Air conditioner

专利摘要:
An air conditioner (100) is provided with: a refrigeration cycle (RC) that has a compressor (32) and an indoor heat exchanger (64); a drain pan (140) that temporarily stores water stuck to the indoor heat exchanger and water falling as drain water; a drain pump (PO) that discharges the drain water stored in the drain pan to the outside; and a control device (20) that controls the operations of the refrigeration cycle and the drain pump. The control device carries out a freezing operation for causing the indoor heat exchanger to function as an evaporator and for setting the surface temperature of the indoor heat exchanger below freezing point, and drives the drain pump so as to satisfy the relationship of "driving time of drain pump after end of normal cooling operation < driving time of drain pump after freezing operation".
公开号:ES2863076A2
申请号:ES201990070
申请日:2018-10-05
公开日:2021-10-08
发明作者:Shinji Takeuchi；Satomi Tokita
申请人:Hitachi Johnson Controls Air Conditioning Inc；
IPC主号:

专利说明:

[0003] TECHNICAL FIELD
[0005] The present invention relates to an air conditioner
[0007] PREVIOUS TECHNIQUE
[0009] A drain pan configured to temporarily accumulate water that adheres to an indoor heat exchanger and is dropped from the indoor heat exchanger in an indoor unit of an air conditioner is provided. Hereinafter, the water accumulated in the drain pan will be called "drain water." The drain water is discharged to the outside through a pipe. However, when such discharge is not performed favorably, the drain water remains in the drain pan. Therefore, it may cause unusual odor or mold. For this reason, indoor units of air conditioners include one that includes a drain pump configured to forcibly discharge the drain water to the outside ( see, for example, Patent Literature 1).
[0011] Air conditioners also include one configured to perform a so-called "freeze wash operation." The "freeze wash operation" is the operation of thawing (melting) the ice (including frost) after the ice has adhered to a surface of the indoor heat exchanger and washing the fine dust that adheres to the heat exchanger. internal heat by means of the impulse to drop water is generated due to the thawing of ice.
[0013] LIST OF APPOINTMENTS
[0014] Patent literature:
[0015] - Patent Literature 1: document JP-A- 2018-25355
[0017] DESCRIPTION OF THE INVENTION
[0019] PROBLEMS TO BE SOLVED BY THE INVENTION
[0021] However, the conventional air conditioner does not take into account the actuation of the drain pump in association with the freeze washing operation. Therefore, in the conventional air conditioner, in the case of performing the freeze-washing operation, it is unknown how to control the drive of the drain pump to reliably reduce the remaining amount of drain water. .
[0023] The present invention has been made to solve the problem described above, and a main object of the present invention is to provide an air conditioner configured to reduce the amount of drain water remaining in the case of performing a freeze washing operation.
[0025] SOLUTIONS TO PROBLEMS
[0027] To achieve the object described above, the present invention relates to an air conditioner that includes a refrigeration cycle that has a compressor configured to compress refrigerant and an indoor heat exchanger, a drain pan configured to temporarily accumulate, such as water from drainage, the water adhering to the indoor heat exchanger and has been dropped from the indoor heat exchanger, a drain pump configured to discharge, to the outside, the accumulated drain water in the drain pan, and a drainage device control configured to control refrigeration cycle and drain pump operation. The control device executes the freezing operation of making the indoor heat exchanger work as an evaporator and bringing the surface temperature of the indoor heat exchanger below zero, and drives the drain pump to satisfy the ratio of " drain pump drive time after completion of normal cooling operation less than drain pump drive time after freeze operation ".
[0029] Other techniques are described later.
[0031] EFFECTS OF THE INVENTION
[0033] According to the present invention, the amount of remaining drain water can be reduced in the case of performing the freeze-washing operation.
[0034] BRIEF DESCRIPTION OF THE DRAWINGS
[0036] Fig. 1 is a system diagram of an air conditioner according to one embodiment.
[0038] Fig. 2 is a sectional side view of an indoor unit of the air conditioner according to the embodiment.
[0040] Fig. 3 is an operation flow chart in the freeze washing operation of the air conditioner according to the embodiment.
[0042] Fig. 4 is an operation time diagram in the freeze washing operation of the air conditioner according to the embodiment.
[0044] Fig. 5 is an operating time diagram of a first variation of the air conditioner.
[0046] Fig. 6 is an operating time diagram of a second variation of the air conditioner.
[0048] DESCRIPTION OF THE EMBODIMENTS
[0050] Next, an embodiment of the present invention (hereinafter referred to as "present embodiment") will be described in detail with reference to the drawings. Note that each figure is simply illustrated schematically to the extent that the present invention can be fully understood. Therefore, the present invention is not limited only to the illustrated examples. Furthermore, in each figure, the same reference numerals are used to represent common or similar components, and the superimposed description thereof will be omitted.
[0052] [Realization]
[0054] <Air conditioning setup>
[0055] Hereinafter, a configuration of an air conditioner 100 according to the present embodiment will be described with reference to Fig. 1. Fig. 1 is a system diagram of the air conditioner 100 according to the present embodiment.
[0057] As illustrated in Figure 1, the air conditioner 100 includes an outdoor unit 30, an indoor unit 60, and a control device 20 configured to control these units. The indoor unit 60 sets, for example, an operation mode (cooling, heating, dehumidification, ventilation, etc.), an indoor air volume (fast wind, strong wind, weak wind, etc.) and a target indoor temperature of according to a signal input from a remote controller 90.
[0059] <Control device setting>
[0061] Control device 20 includes general computer hardware, such as a central processing unit (CPU), a digital signal processor (DSP), a random access memory (RAM), and a read-only memory (ROM). , and for example, a control program to be executed by the CPU and various types of data are stored in ROM. The control device 20 controls each section of the outdoor unit 30 and the indoor unit 60 according to the control program. Note that the details will be described later.
[0063] <Outdoor unit setting>
[0065] The outdoor unit 30 includes a compressor 32, a four-way valve 34, and an outdoor heat exchanger 36. The compressor 32 includes a motor 32a, and has a function of compressing the refrigerant flowing through the four-way valve. 34. A suction side temperature sensor 41 configured to detect the temperature of the refrigerant sucked into the compressor 32 and a suction side pressure sensor 45 configured to detect the pressure of the refrigerant sucked into the compressor 32 are placed in a pipe. a1. Furthermore, a discharge side temperature sensor 42 configured to detect the temperature of the refrigerant discharged from the compressor 32 and a discharge side pressure sensor 46 configured to detect the pressure of the refrigerant discharged from the compressor 32 are placed in a pipe a2. In addition, a compressor temperature sensor 43 configured to detect the temperature of compressor 32 is connected to compressor 32.
[0067] The four-way valve 34 has the function of changing the directions of the refrigerant supplied to the indoor unit 60 depending on whether an indoor heat exchanger 64 of the indoor unit 60 functions as an evaporator or a condenser. In a case where the indoor heat exchanger 64 functions as the evaporator, the four-way valve 34 changes directions, for example, in the cooling operation, so that the pipes a2, a3 connect with each other and the pipes a1 , a6 are connected to each other along a path indicated by a solid line. In this case, the high temperature outdoor refrigerant discharged from the compressor 32 is cooled by the outdoor heat exchanger 36. The cooled refrigerant is supplied to the indoor unit 60 through a pipe a5.
[0069] In a case where the indoor heat exchanger 64 functions as a condenser, the four-way valve 34 changes directions, for example, in the heating operation, so that the pipes a2, a6 are connected to each other and the pipes a1, a3 are connected to each other along a path indicated by a dashed line. In this case, the high-pressure, high-temperature refrigerant discharged from the compressor 32 is supplied to the indoor unit 60 through pipes a2, a6. An outdoor fan 48 includes a motor 48a, and sends air to the outdoor heat exchanger 36.
[0071] The outdoor heat exchanger 36 is a heat exchanger configured to exchange heat between the air sent from the outdoor fan 48 and the refrigerant, and is connected to the compressor 32 through the four-way valve 34. In addition, a temperature sensor input 51 of the outdoor heat exchanger configured to detect the temperature of the air flowing to the outdoor heat exchanger 36, a refrigerant gas temperature sensor 53 of the outdoor heat exchanger configured to detect the temperature of the refrigerant on the gas side of the outdoor heat exchanger 36, and an outdoor heat exchanger refrigerant liquid temperature sensor 55 configured to detect the temperature of the liquid side refrigerant of the outdoor heat exchanger 36 are attached to the outdoor unit 30.
[0072] A power supply section 54 receives three-phase AC voltage from a commercial power supply 22. An energy metering section 58 connects to the power supply section 54, and measures the power consumption of the air conditioner 100 The DC voltage output from the power supply section 54 is supplied to a motor control section 56. The motor control section 56 includes an inverter (not shown), and supplies AC voltage to the motor 32a of the compressor 32 and the motor 48a of the outdoor fan 48. In addition, the motor control section 56 sensorless controls the motors 32a. , 48a to detect the rotational speeds of the motors 32a, 48a.
[0074] <Indoor unit setting>
[0076] Indoor unit 60 includes indoor expansion valve 62, indoor heat exchanger 64, indoor fan 66, motor control section 67, remote controller communication section 68 configured to perform bi-directional communication with remote controller 90. The indoor fan 66 includes a motor 66a, and sends air to the indoor heat exchanger 64. The motor control section 67 includes an inverter (not shown), and supplies AC voltage to the motor 66a. Furthermore, the motor control section 67 sensorless controls the motor 66a to detect the rotational speed of the motor 66a.
[0078] The indoor expansion valve 62 is inserted between the pipes a5, a7, and has the function of adjusting the flow rate of the refrigerant flowing in the pipes a5, a7 and depressurizing the refrigerant on a secondary side of the indoor expansion valve 62. The Indoor heat exchanger 64 is a heat exchanger configured to exchange heat between the indoor air sent from the indoor fan 66 and the refrigerant, and is connected to the indoor expansion valve 62 through pipe a7.
[0080] Furthermore, the indoor unit 60 includes an indoor heat exchanger inlet air temperature sensor 70, an indoor heat exchanger discharged air temperature sensor 72, an indoor heat exchanger inlet humidity sensor 74, a indoor heat exchanger refrigerant liquid temperature sensor 25 and a refrigerant gas temperature sensor 26 of the indoor heat exchanger.
[0082] The inlet air temperature sensor 70 of the indoor heat exchanger described here detects the temperature of the air drawn in by the indoor fan 66. In addition, the discharged air temperature sensor 72 of the indoor heat exchanger detects the temperature of the air discharged from indoor heat exchanger 64.
[0084] In addition, the indoor heat exchanger inlet humidity sensor 74 detects the humidity of the air drawn in by the indoor fan 66. Also, the indoor heat exchanger refrigerant liquid temperature sensor and the refrigerant gas temperature sensor 26 of the indoor heat exchanger are provided at a connection point between the indoor heat exchanger 64 and the pipe a6, and detect the temperature of the refrigerant flowing there. As described above, compressor 32, four-way valve 34, outdoor heat exchanger 36, indoor expansion valve 62, indoor heat exchanger 64, and pipes a1 to a7 form an RC refrigeration cycle.
[0086] <Indoor unit setting>
[0088] Hereinafter, a configuration of the indoor unit 60 will be described with reference to Fig. 2. Fig. 2 is a sectional side view of the indoor unit 60. In the present embodiment, the indoor unit 60 will be described as a device for ceiling module type. The ceiling module type refers to a configuration where the device is embedded in a ceiling 130 and a lower surface of the device is exposed to an air conditioning room. Note that the indoor unit 60 may, for example, be a wall hanging type device, a ceiling recessed type device and a floor type device.
[0090] As illustrated in FIG. 2, the indoor heat exchanger 64 is formed in the form of a substantially V-shaped bent plate, and is positioned in a central portion of the indoor unit 60. The indoor fan 66 is configured such that the fins are arranged in a substantially cylindrical shape, and are arranged at the front of the indoor heat exchanger 64. A drain pan 140 configured to receive the condensation water formed on the surfaces of the indoor heat exchanger 64 and the indoor fan 66 and that has fallen from these surfaces and has temporarily accumulated said water is disposed below the indoor heat exchanger 64 and the indoor fan 66. In Hereafter, the accumulated water in the drain pan 140 will be referred to as "drain water." A PO drain pump configured to forcibly discharge the accumulated drain water in the drain pan 140 to the outside is provided in the indoor unit 60. In the present embodiment, the volume of the drain pan 140 will be described as equal to or slightly less than an expected generation amount of the drain water generated in a short period of time in the freeze washing operation described below. .
[0092] An inclined air filter 142 is provided at the rear of the indoor heat exchanger 64. In addition, a lower surface of the indoor unit 60 is covered with a decorative plate 143. An air suction port 144 formed by the formation of a Slot in the decorative plate 143 is formed below the air filter 142. The inlet air temperature sensor 70 of the indoor heat exchanger is provided between the indoor heat exchanger 64 and the air filter 142.
[0094] An air blowing passage 146 is formed at the front of the indoor fan 66. A right-to-left wind deflector 148 is provided in the middle of the air blowing passage 146, and controls the direction of the air flow in the air. direction from right to left (a direction perpendicular to the plane of the paper). An upper to lower wind deflector 150 is provided at an outlet portion of the air blowing passage 146, and rotates about a pivot point 150a to control the direction of the air flow in an upper to lower direction. The right-to-left wind deflector 148 and the upper to lower wind deflector 150 are rotatably actuated by the control device 20 (see FIG. 1). The upper to lower wind deflector 150 indicated by a solid line in FIG. 2 indicates a position in a fully open state.
[0096] When the air conditioner 100 is stopped, the upper to lower wind deflector 150 is rotated to a fully closed position 152 indicated by a chain line. In addition, when the washing operation described below is executed, the upper to lower wind deflector 150 is rotated to a position 156 indicated by a chain line and then rotated to a washing operation position 154. As the opening degree of the upper to lower wind deflector 150 increases, the resistance of the pipe lines of the blowing passage air 146 decreases. Note that even in a case where the upper to lower wind deflector 150 is closed in the fully closed position 152, a clearance FS is formed between the upper to lower wind deflector 150 and the decorative plate 143, and a little of air flows through the free space FS.
[0098] Note that in the present embodiment, in, for example, a case where it is necessary to wash the interior of the indoor unit 60, a wash lamp (not shown) indicating the need for washing is provided on the decorative plate 143. Furthermore, a suction panel (not shown) to selectively perform suction of air from the air conditioning room is provided between the air suction port 144 and the air filter 142.
[0100] <Operation in the air conditioner freeze wash operation>
[0102] The air conditioner 100 according to the present embodiment can perform the freeze washing operation. The "freeze wash operation" is the operation of thawing (melting) the ice (including frost) after the ice has adhered to a surface of the indoor heat exchanger 64 and washing the fine dust adhering to the heat exchanger interior 64 by means of the impulse of water droplets generated due to thawing of the ice. In "freeze wash operation", more drain water is generated than in normal cooling operation in a short period of time.
[0104] Hereinafter, the operation in the freeze washing operation of the air conditioner 100 will be described with reference to Figs. 3 and 4. Fig. 3 is a flow chart of the operation in the freeze washing operation of the air conditioner. air 100. FIG. 4 is a time diagram of the operation in the freeze washing operation of the air conditioner 100.
[0106] In a case where a user provides an instruction for the execution of the freeze wash operation by the operation of the remote controller 90 or a case where the moment occurs to automatically perform the freeze wash operation, a request for the freeze operation is made and the routine processing illustrated in figure 3 is executed by controlling the control device 20 in response to said request .
[0108] As illustrated in FIG. 3, the processing of the freeze wash operation begins when the request for the freeze operation is made.
[0110] Next, the control device 20 determines whether the freezing operation is available or not (a step S105). In step S105, in a case where it is determined that the freezing operation is not available (in the case of "No"), the freezing washing operation is stopped (a step S110). On the other hand, in step S105, in a case where it is determined that the freezing operation is available (in the case of "Yes"), the control device 20 operates the drain pump PO (a step S115). Note that the drain water can be generated at the beginning of the freeze operation and therefore the PO drain pump can be operated at an early stage of the freeze operation.
[0112] Next, the control device 20 starts the freezing operation (a step S120), and then, after a desired period of time (after enough ice has adhered to the indoor heat exchanger 64), the freezing operation stops (a step S125). Next, the control device 20 begins the defrosting operation to wash the dust on the surface of the indoor heat exchanger 64 (a step S130). Subsequently, after a desired period of time, the drain pump PO is stopped (a step S135) and the drying operation begins (a step S140). Subsequently, after a desired period of time, the control device 20 stops a series of routine processing (the processing of the freeze wash operation). Note that the processing (the processing of stopping the PO drain pump) of step S135 can be skipped according to the operation, and can be moved after the step S140 (the processing of the drying operation).
[0114] Fig. 4 illustrates an example in the case of performing the freeze washing operation interrupting during the normal cooling operation. In the example illustrated in Figure 4, each type of processing that includes "the processing of operation stop (normal cooling operation) ", the" compressor protection "operation, the" air blowing "operation and the" freeze wash "operation are performed in this order. frozen ", each type of processing is performed, including the" freezing "operation, the" thawing "operation and the" drying "operation. In addition, in the" drying "operation, each type of processing is performed, including the "air blowing" operation, the "heating" operation and the "radiation" operation.
[0116] The "compressor protection" operation described herein is the operation of stopping the drive of the compressor 32 to protect the compressor 32. By stopping the drive of the compressor 32, lubricating oil floating in an internal space may fall into the direction of an oil storage section (not shown), and the outflow of the lubricating oil to the outside of the compressor 32 can be prevented. The "air blowing" operation is the operation of driving the indoor fan 66 to make the the wind comes into contact with the indoor heat exchanger 64. The "freezing" operation is the operation of lowering the temperature of the indoor heat exchanger 64 to cause the ice to adhere to the surface of the indoor heat exchanger 64. "Defrost" operation is the operation of increasing the temperature of the indoor heat exchanger 64 to defrost (melt) the ice that adheres to the s surface of the indoor heat exchanger 64 to wash the dust on the surface of the indoor heat exchanger 64. The "drying" operation is the operation of drying the surface of the indoor heat exchanger 64. The "heating" operation is the operation of increasing the temperature of the indoor heat exchanger 64. The "radiation" operation is the operation of releasing heat from the indoor heat exchanger 64 to a space around it.
[0118] In the example illustrated in Figure 4, the following processing is performed. First, the "stop operation" processing from the cooling operation is performed from a time point t0 to a time point t1.
[0120] Furthermore, "compressor protection" operation is performed from time point t1 to time point t2.
[0122] Furthermore, the "air blowing" operation is performed from time point t2 to a point time t3.
[0124] Furthermore, the "freeze" operation is performed from time point t3 to time point t5.
[0126] Furthermore, the "defrost" operation is performed from time point t5 to time point t6.
[0128] Furthermore, the "air blowing" operation is performed from time point t6 to time point t7.
[0130] Furthermore, the "heating" operation is performed from time point t7 to time point t8.
[0132] Furthermore, the "radiation" operation is performed from time point t8 to time point t9.
[0134] Also, the "air blowing" operation is performed after the time point t9. Furthermore, the "freeze wash" operation is performed from time point t3 to time point t9.
[0136] Furthermore, the "drying" operation is performed from time point t6 to time point t9.
[0138] In "stop operation" processing from time point t0 to time point t1, the following state occurs. The driving of the indoor fan 66, the outdoor fan 48, and the compressor 32 that have operated in the cooling operation before the time point t0 is stopped. The top to bottom wind deflector 150 extends downward (opens) at an optional angle. Suction panel (not shown) opens at optional angle. The wash lamp (not shown) lights up. The PO drain pump runs.
[0140] Next, the components whose states change for each type of operation will be described.
[0141] In the "compressor protection" operation from time point t i to time point t2, each of the indoor fan 66 and the outdoor fan 48 is driven at the desired rotational speed. The tilt of the upper to lower wind deflector 150 is set to an upward angle for freezing only. The drain pump PO is driven from time point t1 to time point t1a, and its driving stops at time point t1a. Note that time point t1a is a time point between time point t1 and time point t2.
[0143] In the "air blowing" operation from time point t2 to time point t3, the indoor fan 66 is continuously driven. The rotation speed of the indoor fan 66 in the "air blowing" operation is greater than that which occurs during a period (a period in the "compressor protection" operation) from time point t1 to time point t2 (the same hereinafter).
[0145] In the "freezing" operation from time point t3 to time point t5, the indoor fan 66 is driven up to a time point t4, and its driving is stopped at time point t4. The outdoor fan 48 is driven until time point t5, and its driving stops at time point t5. Compressor 32 is driven up to time point t5, and its drive stops at time point t5. The rotation speed of the indoor fan 66 in "freezing" operation is greater than that of the period (the period in "compressor protection" operation) from time point t1 to time point t2, and is less than in a period (a period in the "air blowing" operation) from time point t2 to time point t3. In addition, the rotating speed of the outdoor fan 48 in the "freezing" operation is greater than a period (a period in the "compressor protection" operation and the "air blowing" operation) of the time point t1. at time point t3.
[0147] In the "defrost" operation from time point t5 to time point t6, the indoor fan 66, the outdoor fan 48, and the compressor 32 are driven.
[0149] In the "air blowing" operation from time point t6 to time point t7, the indoor fan 66 is driven. The tilt of the upper to lower wind deflector 150 is set to a downward angle for freezing only.
[0150] In the "heating" operation from time point t7 to time point t8, the indoor fan 66 is continuously driven, and its driving stops at time point t8. The outdoor fan 48 is driven until time point t8, and its driving stops at time point t8. The rotation speed of the outdoor fan 48 in the "heating" operation is greater than that of the period (the period in the "compressor protection" operation and the "air blowing" operation) from the time point ti to the point time t3, and is less than the same in a period (a period in the "freeze" operation) from time point t3 to time point t5.
[0152] In the "radiation" operation from time point t8 to time point t9, indoor fan 66, outdoor fan 48, and compressor 32 are driven.
[0154] In the "air blowing" operation after the time point t9, the indoor fan 66 is driven.
[0156] Air conditioning main features>
[0158] The air conditioner 100 according to the present embodiment has the following characteristics.
[0160] (1) As illustrated in Fig. 4, the control device 20 executes the freezing operation to make the indoor heat exchanger 64 function as the evaporator and bring the surface temperature of the indoor heat exchanger 64 to less than zero, and drives the drain pump PO to satisfy a relationship of "the drain pump drive time after the completion of the normal cooling operation <the drain pump drive time after the freeze operation".
[0162] Note that in the example illustrated in figure 4, the "drain pump drive time after completion of normal cooling operation" is the time from time point ti to time point aunt. Also, the "drain pump drive time after freeze operation" is the time after the time point t5.
[0163] In "freeze wash operation", more drain water is generated than in normal cooling operation in a short period of time. The air conditioner 100 according to the present embodiment drives the drain pump PO to satisfy the relationship described above, so that the drain water can be efficiently and reliably discharged to the outside. Therefore, the air conditioner 100 according to the present embodiment can reliably reduce a remaining drain water amount in the case of performing the freeze-washing operation. The air conditioner 100 according to the present embodiment as described above can prevent overflow of the drain water from the drain pan 140, and can reduce the appearance of unusual odor and the appearance of mold due to the drain water that remains in the drain pan 140.
[0165] (2) The control device 20 can preferably execute the defrost operation after the completion of the freeze operation, and can operate the drain pump PO for at least part of the time during the defrost operation. Therefore, the air conditioner 100 according to the present embodiment can reduce the amount of remaining drain water in the case of performing the freeze washing operation.
[0167] (3) The control device 20 can preferably execute the drying operation after the completion of the freezing operation, and can drive the drain pump PO for at least part of the time during the defrosting operation and the drying operation. Therefore, the air conditioner 100 according to the present embodiment can more effectively reduce the amount of remaining drain water in the case of performing the freeze washing operation.
[0169] (4) The control device 20 can preferably drive the drain pump PO while the indoor fan 66 is driven in the drying operation.
[0171] In the indoor unit 60, while the indoor fan 66 is being operated, there is a probability that the water generated due to thawing of the ice adhering to the indoor heat exchanger 64 will fall into the drain pan 140 and the drain water will accumulate in the drain pan 140. Therefore, the air conditioner 100 according to the present embodiment drives the drain pump PO while the indoor fan 66 is driven in the drying operation. Therefore, the air conditioner 100 according to the present embodiment can effectively reduce the amount of remaining drain water in the case of performing the freeze-washing operation.
[0173] (5) The control device 20 can continuously drive the drain pump PO for at least part of the time during the freezing operation, the thawing operation and the drying operation.
[0175] The PO drain pump generates a relatively loud sound when turning the drive unit on and off. Therefore, the control device 20 of the air conditioner 100 according to the present embodiment continuously drives the drain pump PO for at least part of the time during the freezing operation, the defrosting operation and the drying operation. Therefore, the air conditioner 100 according to the present embodiment can reduce the appearance of noise due to the PO drain pump.
[0177] (6) The control device 20 can preferably stop the PO drain pump after a lapse equal to or longer than the predetermined time after the completion of the normal cooling operation, and then it can continuously stop the PO drain pump until the freezing operation begins. Therefore, the air conditioner 100 according to the present embodiment can ensure time to stop the drain pump PO. The air conditioner 100 according to the present embodiment can realize a reduction in energy consumption accordingly, that is, it can realize energy saving.
[0179] (7) The control device 20 can preferably continuously drive the PO drain pump for a certain time or more even after completing the drying operation. Note that in the example illustrated in Figure 4, "after completion of the drying operation" means the time point t9 or later. The air conditioner 100 according to the present embodiment continuously drives the drain pump PO for time or more, even after the completion of the drying operation, so that almost all the drain water remaining in the drain pan 140 can be discharged to the outside. Therefore, the air conditioner 100 according to the present embodiment can effectively and reliably reduce the amount of remaining drain water in the case of performing the freeze-washing operation.
[0181] As described above, according to the air conditioner 100 of the present embodiment, the amount of drain water remaining in the case of performing the freeze-washing operation can be reduced.
[0183] Note that the present invention is not necessarily limited to the embodiment described above, and various changes and modifications can be made without departing from the essence of the present invention.
[0185] For example, the embodiment described above has described the details for simplicity in describing the essence of the present invention. Therefore, the present invention is not limited to one that includes all of the components described above. Furthermore, in the present invention, other components can be added to a certain component, or some components can be changed to other components. Furthermore, in the present invention, some components may be omitted.
[0187] For example, in the embodiment described above, the indoor unit 60 has been described as the ceiling module type device. However, the present invention can be applied even, for example, to the wall hanging type device, the ceiling recessed type device and the floor type device.
[0189] For example, the operation of the air conditioner 100 can be modified as in a first variation illustrated in Figure 5 or a second variation illustrated in Figure 6. Figure 5 is an operating time diagram of the first variation of the air conditioner. 100. Fig. 6 is an operating time diagram of the second variation of the air conditioner 100.
[0191] <First variation>
[0193] The operation of the first variation illustrated in Fig. 5 is the operation in the case of receiving the stop operation from the user during the freezing operation.
[0194] The operation of the first variation illustrated in FIG. 5 is different from the operation of the previously described embodiment illustrated in FIG. 4 in that the indoor fan 66 stops in response to the stop operation.
[0196] As illustrated in Figure 5, in the operation of the first variation, the time until the actuation of the drain pump PO begins after the completion of the normal cooling operation (that is, the time of time point t1a at time point t3 while PO drain pump stops) is T11. On the other hand, the time until the actuation of the drain pump PO begins after receiving the stop operation (that is, the time from a time point tA to a time point tB) is T12. Time T12 is a value greater than time T11 (that is, a value that satisfies a relationship of "T12> T11"). That is, in the operation of the first variation, the time until the actuation of the drain pump PO starts after receiving the stop operation in the case of receiving the stop operation from the user during the freezing operation is greater than the time until PO drain pump drive starts after completion of normal cooling operation.
[0198] Such an operation of the first variation can ensure the time for dropping the floating lubricating oil in the internal space of the compressor 32 in the direction of the oil storage section (not shown). Therefore, the operation of the first variation can reduce the decrease in the operating efficiency of the RC refrigeration cycle due to the outflow of the lubricating oil floating in the internal space of the compressor 32 to the outside of the compressor 32.
[0200] <Second variation>
[0202] The operation of the second variation illustrated in FIG. 6 is the operation in a case where the drain pan 140 has a size such that the drain water generated in a short period of time in the freeze-wash operation can accumulate without overflow. . The operation of the second variation illustrated in Figure 6 is different from the operation of the previously described embodiment illustrated in Figure 4 in that the drain pump PO is stopped for at least part of the time during the drying operation.
[0203] Such operation of the second variation can ensure the time to stop the PO drain pump. The operation of the second variation can achieve a reduction in power consumption accordingly, that is, it can achieve energy savings. In addition, the operation of the second variation can reduce the appearance of noise only during the stopping time of the PO drain pump.
[0205] LIST OF REFERENCE NUMBERS
[0207] 20 Control device
[0208] 22 Commercial power supply
[0209] 25 Indoor heat exchanger coolant temperature sensor
[0210] 26 Indoor heat exchanger refrigerant gas temperature sensor 30 Outdoor unit
[0211] 32 Compressor
[0212] 32nd, 48th, 66th Engine
[0213] 34 Four-way valve
[0214] 36 Outdoor heat exchanger
[0215] 41 Suction side temperature sensor
[0216] 42 Discharge side temperature sensor
[0217] 43 Compressor temperature sensor
[0218] 45 Suction side pressure sensor
[0219] 46 Load side pressure sensor
[0220] 48 Outdoor fan
[0221] 51 Outdoor heat exchanger inlet temperature sensor
[0222] 53 Outdoor heat exchanger refrigerant gas temperature sensor 54 Power supply section
[0223] 55 Heat exchanger coolant temperature sensor 56, 67 Engine control section
[0224] 58 Energy Measurement Section
[0225] 60 Indoor unit
[0226] 62 Internal expansion valve
[0227] 64 Outdoor heat exchanger
[0228] 66 Indoor fan
[0229] 68 Remote controller communication section
[0230] 70 Indoor heat exchanger inlet air temperature sensor 72 Outdoor heat exchanger discharged air temperature sensor 74 Outdoor heat exchanger inlet humidity sensor
[0231] 90 Remote controller
[0232] 100 Air conditioner
[0233] 130 Ceiling
[0234] 140 Drain pan
[0235] 142 Air filter
[0236] 143 Decorative plate
[0237] 144 Air intake port
[0238] 146 Air blowing step
[0239] 148 Right-to-left wind deflector
[0240] 150 Upper to lower wind deflector
[0241] 150th pivot point
[0242] 152 Fully closed position
[0243] 154 Position of the washing operation
[0244] 156 Position
[0245] a1, a2, a3, a5, a6, a7 Pipe
[0246] FS Free space
[0247] PO Drain pump
[0248] RC Refrigeration cycle

权利要求:
Claims (9)
[1]
1. An air conditioner comprising:
- a refrigeration cycle including a compressor configured to compress refrigerant and an indoor heat exchanger;
- a drain pan configured to temporarily accumulate, as drain water, the water adhering to the indoor heat exchanger and falling from the indoor heat exchanger; a drain pump configured to discharge, to the outside, the accumulated drain water in the drain pan; and - a control device configured to control the refrigeration cycle and the operation of the drain pump;
where the control device
- performs a freeze operation to make the indoor heat exchanger function as an evaporator and the surface temperature of the indoor heat exchanger to be below zero, and
- drives the drain pump to satisfy a relationship "drain pump drive time after completion of normal cooling operation is less than drain pump drive time after freeze operation".
[2]
The air conditioner according to claim 1, wherein the control device executes the defrosting operation after completing the freezing operation, and drives the drain pump for at least part of the time during the defrosting operation.
[3]
The air conditioner according to claim 2, wherein the control device executes the drying operation after completing the freezing operation, and drives the drain pump for at least part of the time during the defrosting operation and the drying operation.
[4]
The air conditioner according to claim 3, further comprising an indoor fan, wherein the control device drives the drain pump while the indoor fan is driven in the drying operation.
[5]
The air conditioner according to claim 3, wherein the device The control unit continuously drives the drain pump, for at least part of the time, during the freezing operation, the defrosting operation, and the drying operation.
[6]
The air conditioner according to claim 1, wherein the control device stops the drain pump after a predetermined period of time or longer after the completion of the normal cooling operation, and then stops the pump. drain until the freeze operation begins.
[7]
The air conditioner according to claim 4, wherein the control device continuously drives the drain pump for a certain time or more, even after completing the drying operation.
[8]
The air conditioner according to claim 1, wherein the time until the actuation of the drain pump starts after the user stop operation has been received, in case of receiving the stop operation during the freezing operation, it is longer than the time until the drain pump drive starts after the completion of the normal cooling operation.
[9]
9. An air conditioner comprising:
- a refrigeration cycle including a compressor configured to compress refrigerant and an indoor heat exchanger;
- a drain pan configured to temporarily accumulate, as drain water, the water adhering to the indoor heat exchanger and falling from the indoor heat exchanger; a drain pump configured to discharge, to the outside, the accumulated drain water in the drain pan; and - a control device configured to control the refrigeration cycle and the operation of the drain pump,
wherein the control device has the function of performing a freeze washing operation including the freezing operation, the thawing operation and the drying operation;
the drain pan is sized such that the drain water generated in a short period of time in the defrosting operation can accumulate without overflow; and
the control device stops the drain pump for at least part of the time during the drying operation.

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同族专利:

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公开号 | 公开日

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CN111279133A|2020-06-12|

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WO2020070890A1|2020-04-09|

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FR3086999A1|2020-04-10|

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JP6698221B1|2020-05-27|

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TW202014645A|2020-04-16|

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FR3086999B1|2021-05-14|

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CN111279133B|2022-01-25|

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TWI705222B|2020-09-21|

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ES2863076R1|2021-10-14|

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JPWO2020070890A1|2021-02-15|

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法律状态:
2021-10-08| BA2A| Patent application published|Ref document number: 2863076 Country of ref document: ES Kind code of ref document: A2 Effective date: 20211008 |

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优先权:

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申请号 | 申请日 | 专利标题

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PCT/JP2018/037442|WO2020070890A1|2018-10-05|2018-10-05|Air conditioner|

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