EP2950009A1 - Procédé de commande d'un dispositif destiné à l'humidification de l'air et dispositif d'humidification de l'air - Google Patents

Procédé de commande d'un dispositif destiné à l'humidification de l'air et dispositif d'humidification de l'air Download PDF

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Publication number
EP2950009A1
EP2950009A1 EP15160771.0A EP15160771A EP2950009A1 EP 2950009 A1 EP2950009 A1 EP 2950009A1 EP 15160771 A EP15160771 A EP 15160771A EP 2950009 A1 EP2950009 A1 EP 2950009A1
Authority
EP
European Patent Office
Prior art keywords
boiler
liquid
heating element
riser
level
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP15160771.0A
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German (de)
English (en)
Other versions
EP2950009B1 (fr
Inventor
Jochen Buschle
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Binder GmbH
Original Assignee
Binder GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Binder GmbH filed Critical Binder GmbH
Priority to PL15160771T priority Critical patent/PL2950009T3/pl
Publication of EP2950009A1 publication Critical patent/EP2950009A1/fr
Application granted granted Critical
Publication of EP2950009B1 publication Critical patent/EP2950009B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/0008—Control or safety arrangements for air-humidification
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
    • F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
    • F24F3/14—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F6/00—Air-humidification, e.g. cooling by humidification
    • F24F6/18—Air-humidification, e.g. cooling by humidification by injection of steam into the air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F6/00—Air-humidification, e.g. cooling by humidification
    • F24F2006/008—Air-humidifier with water reservoir

Definitions

  • the invention relates to a method for controlling a device for humidification and a device for humidification.
  • a room such as a room of a climate or environmental simulation cabinet
  • steam can be supplied to realize a desired humidity in the room.
  • the air humidity in the room should reach a certain value, desirably in the shortest possible time. It is desirable in this case that steam can be made available in sufficient quantity in order to be able to realize rapid increases in the desired humidity value or to be able to compensate for losses in moisture, for example when the door is opened, in a short time.
  • Such a device for humidification is usually operated in continuous operation, with a long life is desirable. Furthermore, a simple structure with as few components as possible in order to reduce the probability of failure.
  • Non-pressurized systems that is systems which are not completely closed and in which no overpressure or only low pressures, for example of less than 0.1 bar, can prevail, are often to be preferred, since the approvals for such systems often require less effort.
  • a substantially pressureless system discloses the DD 208 207 ,
  • the apparatus described there has an evaporator with a stepwise switchable heater and a regulated depending on the humidity steam trap and a dive electron control, wherein at least one heating stage depending on the vapor pressure by means of immersion electrodes is switched on and off to maintain a vapor state in the evaporator with shut-off steam discharge line ,
  • This allows the steam pressure to be increased only slightly during full-load operation and suddenly blocked steam discharge and subsequently only a low vapor pressure is maintained.
  • This system makes it possible to keep the liquid in the evaporator permanently near the boiling point.
  • the object of the invention is to develop a device for air humidification, which in particular has a heatable by a heating element boiler for a liquid to be evaporated, which has a steam valve, through which steam can be discharged from the boiler into a room, to further develop, in particular that a simple structure is achieved. Furthermore, the object of the invention is to provide a method for controlling such a device for humidification, with which in the most energy-efficient manner, the energy loss of such a device during operation can be determined and compensated.
  • the object of the invention is achieved by a method for controlling a device for humidification with the features of patent claim 1 and a device for humidification with the features of claim 11.
  • the inventive method for controlling a device for humidification with a heated by a heating element boiler for a liquid to be evaporated which has a steam valve through which steam from the boiler can be discharged into a room, the boiler in a region which in at Operating conventional filling of the boiler with liquid is arranged below the liquid level, is connected to a first riser, and in the boiler, a device for determining the level of the liquid is arranged, comprises the following steps: Step a): When in the boiler at least up to a predetermined upper level filled liquid, preferably up to a predetermined upper level filled liquid, the steam valve is closed.
  • step b the heating element is switched on and the liquid heated, whereby a vapor pressure is created, which presses liquid from the boiler into the riser.
  • step c) as soon as a predetermined lower level in the boiler is exceeded, the heating element is switched off.
  • step d) the time duration between the switching on and the switching off of the heating element and the time duration between the switching on of the heating element and the time at which after the switching off of the heating element, the predetermined upper level is reached again determined.
  • step e a base load of the device from the ratio of time between switching on and off of the heating element and time between switching on of the heating element and the time at which after reaching the heating element, the predetermined upper level is reached again determined.
  • the base load corresponds to the heat loss of the device or the heating load, which is necessary to compensate for the heat loss of the device.
  • the base load of the device be determined and used for efficient and energy-efficient control of the device.
  • water is used as the liquid.
  • a particularly preferred embodiment of the invention provides that in a standby mode, steps b) and c), preferably steps b) to e), are repeated several times, as long as the standby mode continues.
  • the standby mode in which the steam valve is closed, is In the boiler thus cyclically a minimum pressure built up.
  • the overpressure in the boiler is determined indirectly via the level in the boiler.
  • the steam valve is closed, it is heated until the pressure rise in the boiler has forced so much liquid into the riser that the lower level in the boiler is undershot. Subsequently, the boiler cools down again due to heat losses and the liquid can flow back out of the riser pipe back into the boiler. After reaching the original upper level, the heating element is reactivated and the liquid is reheated.
  • the heat loss of the device for humidification can be determined in the standby mode from the average heating power, characterized in that the percentage duty cycle of the heating element based on the duration of a cycle, ie the time period between two switch-on, is evaluated. Since this percentage duty cycle corresponds to the base load of the device, this makes it possible to keep the boiler at the boiling point.
  • the heating element can be operated with the base load but also with any other heating load, preferably a heating load, which is higher than the base load, for example, a multiple of the base load.
  • a heating load which is higher than the base load, for example, a multiple of the base load. The higher the heat load, the shorter the cycles are usually.
  • the steam valve is opened in an operating mode and the heating element is operated with the last determined base load plus a heat load determined from a request signal.
  • the request signal is advantageously provided by a control device, on which the user has set, for example, what humidity should prevail in the room. Once the moisture in the Room deviates from the desired value and this falls below in particular, the device is transferred in an operating mode and opened the steam valve. If the heating element is determined only with the last determined base load, the liquid is kept in the boiler at the boiling point, but almost no steam generated. In order to generate steam, therefore, the heating element is operated with the last determined base load plus a determined from the request signal heating load.
  • an operating mode is switched on in the presence of a request signal and changed to a standby mode when no further request signal has been received for a predetermined period of time.
  • steps a) to e) are carried out when the device is switched on and preferably steps b) to e) are advantageously repeated several times in order to determine the base load of the device when the device is switched on so that it can be used for further activation of the device.
  • an average value for the base load is advantageously determined in order to increase the accuracy of the determination of the base load.
  • a particularly preferred development of the invention provides that the ambient temperature is determined before, during or after steps b) to e) and linked to the base load ascertained in step e), for example by joint storage or other storage. Since the base load is dependent on the ambient temperature, it is thereby made possible to include the ambient temperature in the control and, when operating the device, for example at other ambient temperatures, adjust the base load that would be required for the operating mode.
  • the ambient temperature is determined and adjusted in case of deviation between the determined ambient temperature and the associated with the applied base load ambient temperature, the applied base load to the determined ambient temperature.
  • the determined base load is normalized to a reference ambient temperature and the normalized base load is stored.
  • the device for determining the level of the liquid is designed as a float switch.
  • Float switches have a hysteresis between the switch-on point and the switch-off point.
  • the switch-on point is correlated with the upper level and the switch-off point with the lower level, so that a single float switch for monitoring the level in the boiler is sufficient and at the same time can switch the heating element accordingly.
  • the steam valve in a purge mode, is closed and an inlet valve is opened to the vessel, through which liquid is filled into the vessel so that liquid is forced out of the vessel through the first riser.
  • the rinsing mode is preferably carried out when the heating element is switched off.
  • the heating element is switched off.
  • fluid is replenished via an inlet valve, not only enough to reach the specified upper level, but additional liquid beyond, so that fluid is forced out of the vessel through the first riser.
  • an inlet valve not only enough to reach the specified upper level, but additional liquid beyond, so that fluid is forced out of the vessel through the first riser.
  • the boiler water is diluted and impurities are removed via the riser.
  • the inventive device for air humidification in particular a climatic cabinet, with a heatable by a heating boiler for a liquid to be evaporated, which has a steam valve, through which steam can be discharged from the boiler into a room, characterized in that the boiler in an area, which is arranged in the usual operating in the boiler filling with liquid below the liquid level, is connected to a first riser, wherein in the arrangement of boiler and riser only in the boiler, a device for determining the level of the liquid is arranged.
  • a device has a small number of components and is therefore simple and inexpensive to manufacture and less prone to failure.
  • a substantially pressureless system is provided.
  • the arrangement of the device for determining the level of the liquid in the boiler has the advantage that on the one hand the absolute level and on the other hand the difference between an upper and a lower level can be determined by means of a single device for determining the liquid level, so that both the liquid inlet into the boiler and the switching on and off of the heating element is controllable.
  • the invention provides that the device for determining the level of the liquid in the boiler is designed as a float switch. Since a float switch has a hysteresis between switch-on and switch-off, it is particularly easy with a float switch, both the switching on and off of the heating element of the heating element as well as a level monitoring to see if liquid must be refilled, with a device which is arranged in the boiler is to perform.
  • the height and the diameter of the riser are dimensioned such that a displaced from the boiler volume, which is dependent on the diameter of the boiler and the difference between an upper level and a lower level, is receivable. This ensures that during a cycle according to the invention between switching on of the heating element and time, to which the upper Level is reached again, the volume of the liquid remains constant.
  • the height and the diameter of the riser are dimensioned such that a static pressure for pressing the steam generated in the boiler through the steam valve can be generated. This allows the steam to be transferred from the boiler to the room when the steam valve is opened without additional components.
  • the apparatus comprises a waste water tank for collecting the condensate accumulating in the space, wherein preferably the waste water tank is connected to a second riser and wherein the first riser and the second riser are connected together at their upper end.
  • condensate can be transferred directly from the room into the waste water tank.
  • the connection between the boiler and the wastewater tank via the two risers in a simple manner allows a rinse mode.
  • a sensor for determining the level of the liquid in particular a float switch, is arranged in the waste water tank in order, for example, to obtain information as to when the waste water tank must be emptied.
  • the waste water tank is connected to a waste water pump for pumping out the waste water from the waste water tank, to allow emptying of the waste water tank in a simple manner.
  • the wastewater pump is adjustable in particular in dependence on the level in the wastewater tank.
  • a particularly preferred embodiment of the invention provides that the first riser and / or the second riser are formed as a riser or riser.
  • the boiler has a closable with an inlet valve fluid inlet.
  • the inlet valve is in particular controllable, preferably in dependence on the level in the boiler.
  • the device has a temperature sensor for determining the ambient temperature and / or a temperature sensor for determining the temperature of the liquid in the boiler.
  • determining the ambient temperature it is possible to adapt the operation of the device to the ambient temperature, since the heat losses are dependent on the ambient temperature.
  • determining the temperature of the liquid in the boiler a more accurate determination of the base load can be made.
  • FIG. 1 shows a schematic representation of a device 10 for air humidification.
  • the device 10 has a boiler 12, in which in operation to be evaporated liquid 24, preferably water, is arranged.
  • a heating element 14 is arranged, by means of which the liquid 24 can be heated and in particular evaporated.
  • the boiler 12 has, in particular in its upper area, for example in the top surface, a steam valve 16, through which steam from the boiler 12 in a room, such as a room of a climate cabinet or environmental simulation cabinet, can be dispensed.
  • the device 10 further comprises a first riser 20, which may be formed as a riser or riser.
  • the lower end of the riser 20 opens into the boiler 12 in a range which is below the liquid level of the liquid 24 in normal operation.
  • a device for determining the level is arranged, which may be designed as a float switch 18. Furthermore, the boiler 12 has a liquid inlet 26, which is ideally shut off by means of an inlet valve 28. In one embodiment, a flow regulator 29 may be arranged in the liquid inlet 26. Instead of the flow regulator 29 may also be arranged a flow restrictor in the liquid inlet 26, which is set to a fixed value.
  • the boiler 12 may comprise a safety valve 22, by means of which at excessively high pressure in the boiler 12 pressure from the boiler 12 can be discharged.
  • the device 10 may include a wastewater container 30.
  • condensate accumulating in particular in the room is collected via a condensate return 38.
  • the waste water tank 30 may have a second riser 32, which is advantageously designed as a riser or riser.
  • the second riser 32 opens at its lower end into the sewage tank 30 and is connected at its upper end to the upper end of the first riser 20.
  • the waste water tank 30 may be arranged a device for determining the level, which is designed in particular as a float switch 36. Furthermore, the sewage tank 30 may have a sewage pump 34 for pumping the sewage from the sewage tank 30 into a drain.
  • the device 10 may further comprise a temperature sensor 42, which in particular detects the ambient temperature.
  • the device 10 may also include a temperature sensor (not shown) for determining the temperature of the liquid 24 in the vessel 12.
  • the device 10 has a control 40.
  • the controller 40 in particular turns the heating element 14 on and off, opens and closes the steam valve 16, opens the inlet valve 28, if applicable regulates the flow regulator 29 if necessary and preferably switches on and off the wastewater pump 34.
  • the controller 40 may continue to control the backup valve 22 if present.
  • these controls are taking into account in particular those of the device for determining the level of the liquid 24 in the boiler 12, the float switch 18 and optionally the temperature sensor 42 detected and transmitted information performed. In a development, the information detected by the device for determining the filling level in the wastewater container 36 can also be included in the regulation.
  • the base load of the device 10 can be determined as follows: When in the boiler 12 at least filled up to a predetermined upper level liquid 24, the steam valve 16 is closed. The heating element 14 is turned on, so that the liquid 24 is heated, whereby a vapor pressure is created, which presses a portion of the liquid 24 from the boiler 12 into the first riser 20. The heating element 14 is switched off as soon as a predetermined lower level in the boiler 12 is reached.
  • the upper level correlates with a first switching point of the float switch 18 and the lower level with a lower switching point of the float switch 18.
  • a Signal given to the control 40 for switching off the heating element 14 upon reaching the lower level by means of the float switch 18 a Signal given to the control 40 for switching off the heating element 14, while reaching the upper level by means of the float switch 18, a signal is given to the control 40 for switching on the heating element.
  • the time duration between switching on and off of the heating element 14 and between switching on the heating element 14 and the time at which after switching off the heating element 14, the predetermined upper level is reached again and in particular the heating element 14 is turned on at several cycles, is determined, for example by the controller 40.
  • the base load ie the heat loss of the device 10 can be determined.
  • Such a determination of the base load can preferably take place by means of several cycles in order to increase the accuracy of the determination of the base load.
  • the base load is determined in particular when the device 10 is switched on for the first time, and preferably during a standby mode.
  • the base load value determined in this cycle is not taken into account or only when the upper level has been reached, otherwise it could falsify the determination of the base load.
  • the steam valve 16 are opened to vent the boiler 12. The permanent closing of the steam valve 16 for determining the base load takes place only after the defined number of cycles.
  • the steam / air mixture can be discharged by opening the steam valve 16 and the liquid 24 from the riser 20 back into the boiler 12 flow. Upon reaching the upper level in the boiler 12, the steam valve 16 is closed again.
  • the temperature in the boiler 12 can be determined and the steam valve 16 is first closed to determine the base load when the boiling temperature is almost or completely reached.
  • the standby mode is switched on in particular when there is no request signal for providing steam into the room and thus the device 10 is operated such that steam could be released into the room at any time in the presence of a renewed request signal.
  • the device 10 is advantageously controlled such that in the boiler 12, the liquid 24 is kept substantially constant at the boiling temperature. As a result, no or only a slight excess pressure is produced in the boiler 12, but the device 10 is kept ready so that a request signal can be generated in the boiler 14 immediately by increasing the heating load of the heating element 14 by a small amount an operating mode can be discharged through the steam valve 16 in the room.
  • the liquid 24 is maintained at substantially the boiling temperature as follows.
  • the steam valve 22 is closed.
  • the heating element 14 is turned on and the liquid 24 is heated, whereby a vapor pressure is generated, which presses liquid 24 from the boiler 12 into the first riser 20.
  • the heating element 14 is switched off again.
  • the boiler 12 is kept substantially depressurized and hardly generates steam in the boiler 12, although the liquid 24 can be maintained at substantially the boiling point.
  • the liquid 24 in the boiler 12 cools down again, so that the liquid 24 flows back out of the riser 20 into the boiler 12 can, whereby the liquid level in the boiler 12 rises again.
  • the heating element 14 can be turned on again.
  • the heating element 14 can be turned on again, and then the base load from the ratio of the time between switching on and off of the heating element 14 and the time between switching on the heating element 14 and the time at which after switching off the heating element 14 of the predetermined upper level again is reached, d. H.
  • the heating element 14 can be turned on again determined. This base load is continuously supplied to the heating element 14 in an operating mode and readjusted, if necessary, to compensate for the heat loss in the boiler 12, respectively.
  • the ambient temperature of the device 10 is determined by means of the temperature sensor 42 and, for example, each time the base load is determined, associated with the corresponding base load, for example, stored together. If the ambient temperature changes during operation, a changed base load is necessary to compensate for the heat loss. For example, as soon as a change in the ambient temperature is detected, the base load to be applied to compensate for the heat loss can be readjusted as a function of the newly determined ambient temperature.
  • liquid is replenished via the liquid feed.
  • the inlet valve 28 is opened and optionally the flow controller 29 is controlled accordingly.
  • the diameter and volume of the first riser 20 are advantageously such that in the standby mode, the volume displaced from the boiler 12 can be taken up by the first riser 20 without leaking liquid at the top of the first riser 20, resulting in a loss would lead to liquid 24 in the boiler 12.
  • the height and the diameter of the riser 20 should be such that a static pressure for pressing the steam generated in the boiler 12 through the steam valve 16 when the steam valve 16 is open is possible.
  • the boiler 12 may have a diameter of about 15 cm and a height of about 20 cm.
  • the boiler 12 may be filled up to half with liquid 24.
  • the difference between the upper level and the lower level in the boiler 12 may be about 1 mm.
  • the diameter of the first riser 20 may be about 1.5 cm.
  • the height of the first riser 20 may be for example about 1 m.
  • the liquid 24 accumulates in the boiler 12 with impurities, since only the liquid vapor is discharged through the steam valve 16, but the impurities remain in the boiler 12.
  • a rinsing mode is provided.
  • the steam valve 16 is closed and preferably the heating element 14 is turned off.
  • the inlet valve 28 is opened and liquid 24 through the liquid inlet 26 introduced into the boiler 12.
  • Flushing or thinning may also occur during operation, for example at the beginning of each standby mode. If liquid 24 is supplied during operation, in particular in several cycles or to a large extent, such a large volume is displaced during the heating phase, that over the first riser 20 liquid is removed from the boiler and in this way rinsing is achieved.
  • the steam valve 16 In an operating mode, which is set in response to a request signal, the steam valve 16 is opened.
  • the heating element 14 is not only applied to the base load, but in addition to a heating load, which the request signal equivalent.
  • the request signal determines what humidity should prevail in the room. By means of a corresponding sensor in the room, the moisture is detected and as long as steam is required until the desired humidity is reached. Only when the desired humidity in the room is established, no further request signal is sent. Then the device 10 can again switch to the standby mode.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Humidification (AREA)
  • Control Of Steam Boilers And Waste-Gas Boilers (AREA)
EP15160771.0A 2014-05-28 2015-03-25 Procédé de commande d'un dispositif destiné à l'humidification de l'air et dispositif d'humidification de l'air Active EP2950009B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL15160771T PL2950009T3 (pl) 2014-05-28 2015-03-25 Sposób sterowania urządzeniem do nawilżania powietrza i urządzenie do nawilżania powietrza

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE201410107553 DE102014107553B3 (de) 2014-05-28 2014-05-28 Verfahren zur Ansteuerung einer Vorrichtung zur Luftbefeuchtung und Vorrichtung zur Luftbefeuchtung

Publications (2)

Publication Number Publication Date
EP2950009A1 true EP2950009A1 (fr) 2015-12-02
EP2950009B1 EP2950009B1 (fr) 2018-05-02

Family

ID=52775476

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15160771.0A Active EP2950009B1 (fr) 2014-05-28 2015-03-25 Procédé de commande d'un dispositif destiné à l'humidification de l'air et dispositif d'humidification de l'air

Country Status (4)

Country Link
EP (1) EP2950009B1 (fr)
CN (1) CN105299823B (fr)
DE (1) DE102014107553B3 (fr)
PL (1) PL2950009T3 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2122573A (en) * 1935-08-14 1938-07-05 Powers Regulator Co Apparatus for evolving water vapor
US2562843A (en) * 1946-11-21 1951-07-31 Bohus Mek Verkst S Aktiebolag Electrical heating apparatus and method
DD208207A1 (de) 1981-11-23 1984-03-28 Anton Prade Vorrichtung zur regelung eines dampfbefeuchters
US20030016952A1 (en) * 2001-07-10 2003-01-23 Elphee David Andrew Low-maintenance humidifier
WO2014071533A1 (fr) * 2012-11-06 2014-05-15 Condair Ag Dispositif d'évaporation

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1450833A (en) * 1921-10-06 1923-04-03 Bergeon Paul Steam-heating appliance
CH489758A (de) * 1968-04-25 1970-04-30 Badertscher Hans Wasserverdampfer
GB2154896B (en) * 1984-03-02 1987-08-12 Atlas Air Australia Air humidifying apparatus
CN2308832Y (zh) * 1997-08-27 1999-02-24 刘文正 蒸气加湿器
CN2711607Y (zh) * 2004-07-16 2005-07-20 古晋光 电热蒸汽加湿器

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2122573A (en) * 1935-08-14 1938-07-05 Powers Regulator Co Apparatus for evolving water vapor
US2562843A (en) * 1946-11-21 1951-07-31 Bohus Mek Verkst S Aktiebolag Electrical heating apparatus and method
DD208207A1 (de) 1981-11-23 1984-03-28 Anton Prade Vorrichtung zur regelung eines dampfbefeuchters
US20030016952A1 (en) * 2001-07-10 2003-01-23 Elphee David Andrew Low-maintenance humidifier
WO2014071533A1 (fr) * 2012-11-06 2014-05-15 Condair Ag Dispositif d'évaporation

Also Published As

Publication number Publication date
EP2950009B1 (fr) 2018-05-02
DE102014107553B3 (de) 2015-04-23
CN105299823A (zh) 2016-02-03
CN105299823B (zh) 2019-02-22
PL2950009T3 (pl) 2018-09-28

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