• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    SUMMARY 1. A sterilizing device comprising a space for objects to be sterilized, which space is connected to a steam generating device. loop. The friend has a smaller water space than the reservoir and has sufficient friend power to heat some of the water that is circulated from the pump to steam-producing temperatures, but less than what would be required to convert all the water that passes through to steam. The flow cross section of the water inside the heater is small enough to provide a high velocity for the water in the heater in order to prevent or substantially eliminate particle buildup in the heater.
    公开号:SE0900148A1
    申请号:SE0900148
    申请日:2009-02-08
    公开日:2010-08-09
    发明作者:Martin Holmer；Francies Williams；Oerjan Ring
    申请人:Power Steam Generator Ab；
    IPC主号:
    专利说明:

    15 20 25 30 2 The water flow in relation to the heat energy should be sufficient to prevent the water from completely turning into steam. Overheating can otherwise destroy the electric heating and also the flushing away of mineral particles becomes less efficient. In reality, the amount of water that passes during a given time should be many times the amount that can be evaporated by the heating elements at the same time.
    Below the above limit, however, the heating effect can be considerable, especially in relation to the amount of water present in the pipes. This means that in the few seconds it takes for the water to pass through a pipe, a limited percentage of the water will turn to steam before or at the time of leaving the pipe, but since the amount of water passing is considerable, a high steam production will be obtained. This also means that steam production can be started very quickly. The delay time is mainly caused by the inertia in the heating of pipes and heating devices. This is a great advantage because you only have to wait seconds before you have steam, which can be compared to known sterilization devices where you have to wait for minutes. Generation of lime particles will also be concentrated on the heated pipes, which simplifies the collection and removal thereof. In its simplest form, the particles of, for example, lime can be allowed to sink to the bottom in a combined sedimentation tank and water reservoir that can be cleaned at intervals.
    The condensation of steam on the objects to be sterilized transfers heat to said objects very quickly and efficiently.
    In an improved further development of the invention, the separation of water, lime and steam is enhanced by a powerful vortex movement of the water at the top of the water reservoir.
    This rapid vortex motion of the water causes the heavier particles such as lime to pull against the reservoir wall and the steam towards the center thereof. The water outlet to the pump is advantageously arranged in the center of the reservoir and a distance above the bottom of the reservoir so that the amount of lime particles in the water given off for heating will be small. The steam is diverted through an opening in the top of the reservoir.
    In a very advantageous further development of the invention, said combined reservoir and separating sedimentation tank is formed as a cylinder and arranged in the space inside the heating elements, which can be constituted by pipes. This gives a short distance for the water to move from the heater to the separator. When the water from the pipes enters the reservoir through substantially tangential inlets, the water will be subjected to a pressure drop which releases the steam, an effect which is believed to be amplified by the swirling movement in the top of the reservoir.
    At the same time, already precipitated particles in the water as well as particles that fall out at the entrance to the top of the reservoir will move towards the wall of the reservoir at the same time as the evaporation. This means that the lime particles and the like will be removed from the water almost immediately before they have the chance to contaminate the device as a whole unit. As the water sinks to the bottom, the vortex dampens and the lime particles fall along the wall down to the bottom of the reservoir.
    Further developments of the invention appear from the subclaims and the following description of exemplary embodiments of the invention with reference to the drawings. In the drawings, fi g 1 shows a steam producing device for a sterilization apparatus without external thermal insulation or sterilization space, fi g 2 the same view as in fi g 1 but with some parts of the heating pipes removed and Fig. 3 a steam producing device which is slightly different on the inside. The meadow-producing device shown in Figures 1 and 2 is provided with three helical tubes 4 which at their ends are provided with T-shaped connections 14 through which cable-like heating elements 3 extend into the tubes, through them and out into the other ends. The T-shaped connections also connect the pipes with a pump 2 at the lower end and with a separation device arranged centrally inside the pipes.
    The T-connections 14 at the upper ends of the tubes are connected to inlet tubes 15 which open tangentially into the upper end of a central cylindrical reservoir housing 16. Instead of being tangential relative to the inside of the cylindrical housing, these inlet tubes 15 extend into the housing. extend into the housing and be curved slightly downward and tangentially along the inside of the housing.
    From the top of the cylindrical housing 16, a short, vertical central cylinder 9 extends a short distance into the cylindrical housing and terminates just below the inner ends of the inlet pipes and serves as an outlet from the steam to the furnace. Silicone elements 12, 13 or perforated discs are arranged in the cylindrical outlet and serve to collect excess water from the steam.
    When the water together with trapped lime particles and steam comes out of the inlet pipes 15, it will at high speed follow the inside of the cylinder in a swirling or rotating motion which slowly sinks downwards. During this movement, the trapped steam, which is lighter than water, will come out on the inside of the vortex, while the limestone particles having a higher density than water will end up near the inside of the cylinder wall. Gradually the velocity of the water vortex decreases as it continues down towards the bottom of the cylinder, the inside of the water has, where the vortex is, a concave parabolic surface shape at the top.
    The speed at which the water enters the above device is higher than that given by the pump because the successive generation of steam in the spiral tubes 4 increases the volume of the mixture, and thereby its speed continuously increases. This high speed not only provides a good separation but also increases the ability of the water to sweep away particles in the pipes. At least the majority of the lime particles sink down along the inner wall of the cylinder to an annular space between a central outlet pipe 5 and the cylinder wall.
    Pump 2 is a centrifugal pump with three evenly distributed outlets, one for each spiral tube producing the same flow through each tube even though the flow resistance varies, ensuring that the flow in all the cylindrical tubes is sufficient to prevent overheating and destruction.
    The water that condenses on the objects to be sterilized falls to the bottom of the sterilization chamber where it can be led back to the inlet of the pump or to an outlet for dispensing.
    To compensate for the water leaving the steam sterilizing device in the form of condensed used water or steam when the sterilization space is opened, fresh water must be added. This fresh water is added when needed intermittently through one or more inlets 11 to the annular space between the wall of the cylindrical housing 16 and the central outlet 5 to the pump via a valve from a water line. The relatively frequent but low velocity supplied fresh water will continuously stir the collected limestone particles preventing their sintering.
    The supply of water is controlled by a sensor device 6 arranged some distance up in the cylinder.
    The sensor can, for example, be of a resistance measuring type.
    The inlet or inlets may be directed tangentially or alternatively a shield may be provided above to ensure a repeatedly limited agitation of the lime particles with a minimum of lifting of the lime particles.
    In the same annular space as the inlet for the supplied water, a valve-provided outlet 10 or fl are arranged. To the inlet, a further valve with a higher capacity or unthrottled flow is arranged from the water line. Occasionally when heating and circulation are switched off, the lime sludge on the bottom is flushed out by opening the large inlet valve and the outlet valve. A separate inlet for gaming can also be an option.
    I fi g. 3 shows an alternative embodiment shown where no tubular steam outlet extends down into the reservoir, instead an inner spiral fl is 19 arranged on the inner wall of the cylindrical reservoir housing 16 leading the water in a downward spiral.
    If an increased separating centrifugal force is desired, a vortex space of smaller diameter can be arranged at the top of the reservoir, for example in the form of a lid or insert integrated with the inlet pipes.
    The invented steam generating device not only eliminates the problem of agor but also provides a very rapid heating eliminating the need to heat all the water in the whole device and keep it at 70 ° as in the prior art.
    Instead of using pipes in the narrowing channels with a narrow and continuous cross section, channels can be made with an inner cylindrical core provided with external spiral grooves and a surrounding jacket in two halves also provided with corresponding grooves which coincide with the grooves in the central core. The heating can be done with a cable in each channel or with an external heating of the channels.
    权利要求:
    Claims (10)
    [1]
    A sterilizing device comprising a space for objects to be sterilized, which space is connected to a steam-producing device with a water reservoir, characterized in that it comprises a pump and a heater, connected in series in a loop, the heater having a smaller water space than the reservoir .
    [2]
    Device according to claim 1, characterized in that it has sufficient heating power to heat a part of the water circulated by the pump to steam-producing temperatures, but less than would be required to convert all the water passing into steam, and that the flow cross-section for the water on the inside of the heater is small enough to provide high velocity for the water in the heater in order to prevent or substantially eliminate particulate matter accumulation in the heater.
    [3]
    Device according to claim 1 or 2, characterized in that the heater comprises one or more pipes or cylindrical channels in which heating elements in the form of heating cables are arranged.
    [4]
    Device according to one of Claims 1 to 3, characterized in that it comprises pipes or ducts which are heated from the outside by combustion or by electricity.
    [5]
    Device according to one of the preceding claims, characterized in that the reservoir has tangential inlets from the heating elements and a cylindrical shape at the inlets and a section below which causes the incoming water to swirl or rotate causing a separation of steam and lime particles from the water inwards and outwards.
    [6]
    Device according to claim 5, characterized in that the reservoir has a central cylindrical pipe-like outlet for water extending some distance up from the bottom of the water reservoir and an annular space between said cylindrical outlet and the reservoir wall for collecting limescale particles.
    [7]
    Device according to one of the preceding claims, characterized in: of a water inlet for supplying water to replace the steam which after turning has been discharged from the device as water or steam which leaks into the surroundings when the space is opened, which water inlet is arranged at the bottom of a collection space for lime particles so that the fresh water easily stirs lime, preventing it from clumping together.
    [8]
    Device according to one of the preceding claims, characterized in that it comprises valve-provided inlets and outlets for flushing a collecting space for flushing out accumulated limescale particles.
    [9]
    Device according to one of the preceding claims, characterized in that the heating pipes or ducts are wound around the reservoir.
    [10]
    Device according to one of the preceding claims, characterized in that it comprises several pipes and with an outlet from the pump to each pipe or duct.
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    同族专利:
    公开号 | 公开日
    SE535081C2|2012-04-10|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    2016-10-04| NUG| Patent has lapsed|
    优先权:
    申请号 | 申请日 | 专利标题
    SE0900148A|SE535081C2|2009-02-08|2009-02-08|sterilization device|SE0900148A| SE535081C2|2009-02-08|2009-02-08|sterilization device|
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