WO2013046609A1 - 調湿装置 - Google Patents
調湿装置 Download PDFInfo
- Publication number
- WO2013046609A1 WO2013046609A1 PCT/JP2012/005988 JP2012005988W WO2013046609A1 WO 2013046609 A1 WO2013046609 A1 WO 2013046609A1 JP 2012005988 W JP2012005988 W JP 2012005988W WO 2013046609 A1 WO2013046609 A1 WO 2013046609A1
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- WIPO (PCT)
- Prior art keywords
- air
- heat exchanger
- adsorption heat
- humidity control
- path
- Prior art date
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Classifications
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- 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
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- 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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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- 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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
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- 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
- F24F3/1411—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 by absorbing or adsorbing water, e.g. using an hygroscopic desiccant
- F24F3/1429—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 by absorbing or adsorbing water, e.g. using an hygroscopic desiccant alternatively operating a heat exchanger in an absorbing/adsorbing mode and a heat exchanger in a regeneration mode
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/50—Load
Definitions
- the present invention relates to a humidity control apparatus that performs dehumidification and humidification of air using an adsorption heat exchanger carrying an adsorbent.
- Patent Document 1 discloses a humidity control apparatus including an adsorption heat exchanger that supports an adsorbent.
- two adsorption heat exchangers are provided in a refrigerant circuit that performs a refrigeration cycle.
- the refrigerant circuit includes a refrigeration cycle operation in which the first adsorption heat exchanger serves as a radiator and the second adsorption heat exchanger serves as an evaporator, and the first adsorption heat exchanger serves as a radiator.
- the refrigeration cycle operation in which becomes an evaporator is alternately performed every predetermined time (for example, every 3 minutes).
- the humidity control device of Patent Document 1 ventilates the indoor space. That is, this humidity control apparatus supplies outdoor air to the indoor space and discharges indoor air to the outdoor space.
- the humidity control apparatus includes a plurality of open / close dampers. And this humidity control apparatus switches the distribution
- the air flow path in the humidity control apparatus is such that outdoor air is supplied to the indoor space after passing through the first adsorption heat exchanger, and the indoor air passes to the outdoor space after passing through the second adsorption heat exchanger.
- the humidity control apparatus of Patent Document 1 performs switching of the refrigeration cycle operation in the refrigerant circuit and switching of the air flow path in conjunction with each other.
- the humidity control apparatus during the dehumidifying operation supplies the outdoor air dehumidified in the adsorption heat exchanger serving as an evaporator to the indoor space, and removes moisture desorbed from the adsorption heat exchanger serving as a radiator. Exhaust into the outdoor space with room air.
- the humidity control apparatus during the humidifying operation supplies the outdoor air humidified in the adsorption heat exchanger serving as a radiator to the indoor space, and moisture is deprived of the adsorption heat exchanger serving as an evaporator. Exhaust indoor air into the outdoor space.
- humidity control that is, a dehumidification amount and a humidification amount per unit time
- the humidity control capability is controlled by adjusting the operating capacity of the compressor (specifically, the rotational speed of the compressor).
- the compressor in order for the compressor to operate normally, it is necessary to keep the rotational speed of the compressor above a certain level. That is, there is a lower limit in the adjustment range of the operating capacity of the compressor, and the operating capacity of the compressor cannot be set below the lower limit of the adjustment range. For example, when the lower limit of the adjustment range of the operating capacity of the compressor is 20% of the maximum capacity, the operating capacity of the compressor cannot be set to 10% of the maximum capacity. Therefore, in a humidity control apparatus equipped with a compressor, the humidity control capacity cannot be set below a predetermined lower limit value.
- the conventional humidity control apparatus even if the operating capacity of the compressor is set to the minimum capacity, the compressor is stopped when the humidity control capacity is excessive.
- the humidity control apparatus that ventilates the indoor space as well as adjusting the humidity of the air as disclosed in Patent Document 1, it is necessary to continuously ventilate the indoor space even when the compressor is stopped. Therefore, when the humidity control capacity becomes excessive when the compressor is operated, the conventional humidity control device stops the compressor, while supplying the outdoor air to the indoor space and discharging the indoor air to the outdoor space. To continue.
- the conventional humidity control device does not switch the air flow path. Accordingly, during this operation, outdoor air continues to pass through one of the adsorption heat exchangers and indoor air continues to pass through the other adsorption heat exchanger. For this reason, the outdoor air is supplied to the indoor space as it is without adjusting the temperature and humidity, and the comfort of the indoor space may be impaired.
- the present invention has been made in view of such points, and an object of the present invention is to provide a refrigeration cycle operation of the refrigerant circuit in a humidity control apparatus that includes the refrigerant circuit and performs dehumidification and humidification of outdoor air supplied to the indoor space.
- the object is to ensure the comfort of the indoor space by adjusting the temperature and humidity of the outdoor air supplied to the indoor space even in a stopped state.
- the first invention is directed to a humidity control device.
- the compressor (53) includes a first adsorption heat exchanger (51) and a second adsorption heat exchanger (52) each carrying an adsorbent, and the first adsorption heat exchanger (51). Becomes a radiator and the second adsorption heat exchanger (52) becomes an evaporator, and the second adsorption heat exchanger (52) becomes a radiator and the first adsorption heat exchange.
- the switching mechanism (40) alternately sets the air flow path to the first path and the second path, and dehumidifies or humidifies the outdoor air supplied to the indoor space.
- the air supply fan (26) and the exhaust fan (25) are activated, the compressor (53) of the refrigerant circuit (50) is stopped, and the switching mechanism (40) changes the air flow path every predetermined time.
- a second operation that alternately sets the first route and the second route is also performed. It is.
- the humidity controller (10) performs the first operation and the second operation.
- the compressor (53) of the refrigerant circuit (50) is operated, and the refrigerant circuit (50) alternately performs the first refrigeration cycle operation and the second refrigeration cycle operation. . That is, in the refrigerant circuit (50), every time a predetermined time elapses, the first refrigeration cycle operation and the second refrigeration cycle operation are switched to each other.
- the adsorption heat exchanger (51, 52) serving as a radiator the adsorbent carried on the surface is heated by the refrigerant, and moisture is desorbed from the adsorbent.
- the moisture desorbed from the adsorbent is given to the air passing through the adsorption heat exchanger (51, 52).
- the adsorption heat exchanger (51, 52) serving as an evaporator moisture in the air passing therethrough is adsorbed by the adsorbent.
- the refrigerant flowing through the adsorption heat exchanger (51, 52) absorbs the heat of adsorption generated when moisture in the air is adsorbed by the adsorbent and evaporates.
- the switching mechanism (40) switches the air flow path between the first path and the second path. At that time, the switching mechanism (40) switches the air flow path in conjunction with switching of the refrigeration cycle operation in the refrigerant circuit (50). That is, when the operation of the refrigerant circuit (50) is switched from one of the first refrigeration cycle operation and the second refrigeration cycle operation to the other, the air flow path is switched from one of the first path and the second path to the other.
- the switching mechanism (40) sets the air flow path to the second path when the refrigerant circuit (50) performs the first refrigeration cycle operation, and the refrigerant circuit
- the switching mechanism (40) sets the air flow path to the first path when the (50) is performing the second refrigeration cycle operation, the dehumidified outdoor air is supplied to the indoor space and is humidified. Is discharged into the outdoor space.
- the switching mechanism (40) sets the air flow path as the first path when the refrigerant circuit (50) performs the first refrigeration cycle operation,
- the switching mechanism (40) sets the air flow path to the second path while the refrigerant circuit (50) is performing the second refrigeration cycle operation, the humidified outdoor air is supplied to the indoor space and dehumidified. Indoor air is discharged to the outdoor space.
- the humidity controller (10) in the humidity controller (10) during the second operation, the compressor (53) of the refrigerant circuit (50) is stopped, while the air supply fan (26) and the exhaust fan (25) are operated. to continue. Even during the second operation, the switching mechanism (40) alternately sets the air flow path to the first path and the second path. Therefore, in the humidity controller (10) during the second operation, the outdoor air is supplied to the indoor space after passing through the first adsorption heat exchanger (51), and the indoor air passes through the second adsorption heat exchanger (52).
- outdoor air is supplied to the indoor space after passing through the second adsorption heat exchanger (52), and the indoor air is discharged to the outdoor space after passing through the first adsorption heat exchanger (51) Alternately performed.
- the second operation of the humidity control apparatus (10) will be described by taking as an example the case where the temperature and absolute humidity of the outdoor air are slightly higher than the room air (for example, when the room is cooled in late spring or early autumn). .
- the humidity control apparatus (10) during the second operation, the outdoor air supplied to the indoor space is cooled and dehumidified.
- the reason will be described.
- the explanation starts from the state where the air circulation route is set to the first route. In this state, outdoor air passes through the first adsorption heat exchanger (51), and indoor air passes through the second adsorption heat exchanger (52).
- the liquid refrigerant remains in the first adsorption heat exchanger (51).
- the liquid refrigerant present in the first adsorption heat exchanger (51) generates adsorption heat generated when moisture in the outdoor air is adsorbed by the adsorbent. It absorbs and absorbs heat from the outdoor air and evaporates.
- the second adsorption heat exchanger (52) indoor air having a temperature lower than that of the outdoor air flows. For this reason, the refrigerant evaporated in the first adsorption heat exchanger (51) flows into the second adsorption heat exchanger (52) and condenses. In the second adsorption heat exchanger (52), the adsorbent is heated by the heat of condensation released from the refrigerant, and moisture is desorbed from the adsorbent and applied to the room air. Further, in the second adsorption heat exchanger (52), the heat conveyed from the first adsorption heat exchanger (51) by the refrigerant is released to the indoor air.
- the air circulation route is switched from the first route to the second route. That is, the air passing through the first adsorption heat exchanger (51) is switched from outdoor air to room air, and the air passing through the second adsorption heat exchanger (52) is switched from room air to outdoor air.
- moisture is desorbed from the adsorbent of the second adsorption heat exchanger (52) when the air flow path is set to the first path. For this reason, after the air flow path is switched to the second path, moisture contained in the outdoor air is adsorbed to the second adsorption heat exchanger (52).
- the refrigerant present in the second adsorption heat exchanger (52) absorbs adsorption heat generated when moisture in the outdoor air is adsorbed by the adsorbent, and further absorbs heat from the outdoor air and evaporates. Therefore, in the second adsorption heat exchanger (52), the temperature and absolute humidity of the outdoor air passing therethrough are lowered. As a result, the temperature and absolute humidity of the outdoor air approach the temperature and absolute humidity of the air in the indoor space.
- the refrigerant evaporated in the second adsorption heat exchanger (52) flows into the first adsorption heat exchanger (51) and condenses.
- the adsorbent is heated by the condensation heat released from the refrigerant, and moisture is desorbed from the adsorbent. That is, the first adsorption heat exchanger (51) adsorbs moisture in outdoor air when the air circulation path is set to the first path, and the air circulation path is set to the second path. Sometimes releases moisture into room air. Further, in the first adsorption heat exchanger (51), the heat transferred from the second adsorption heat exchanger (52) by the refrigerant is released to the indoor air.
- the air circulation path is switched again from the second path to the first path. That is, the air passing through the first adsorption heat exchanger (51) is switched from room air to outdoor air, and the air passing through the second adsorption heat exchanger (52) is switched from outdoor air to room air.
- the first adsorption heat exchanger (51) the outdoor air is cooled and dehumidified.
- the temperature and absolute humidity of the outdoor air approach the temperature and absolute humidity of the air in the indoor space.
- the second operation of the humidity control apparatus (10) will be described by taking as an example the case where the temperature and absolute humidity of the outdoor air are slightly lower than the room air (for example, when the room is heated in early spring or late autumn). To do.
- the humidity control apparatus (10) in the second operation the outdoor air supplied to the indoor space is heated and humidified.
- the reason will be described.
- the explanation starts from the state where the air circulation route is set to the first route. In this state, outdoor air passes through the first adsorption heat exchanger (51), and indoor air passes through the second adsorption heat exchanger (52).
- the liquid refrigerant remains in the second adsorption heat exchanger (52).
- the liquid refrigerant present in the second adsorption heat exchanger (52) generates adsorption heat generated when moisture in the indoor air is adsorbed by the adsorbent. It absorbs and absorbs heat from room air and evaporates.
- the refrigerant evaporated in the second adsorption heat exchanger (52) flows into the first adsorption heat exchanger (51) and condenses.
- the adsorbent is heated by the heat of condensation released from the refrigerant, and moisture is desorbed from the adsorbent and applied to the outdoor air.
- the heat transferred from the second adsorption heat exchanger (52) by the refrigerant is released to the outdoor air.
- the air circulation route is switched from the first route to the second route. That is, the air passing through the first adsorption heat exchanger (51) is switched from outdoor air to room air, and the air passing through the second adsorption heat exchanger (52) is switched from room air to outdoor air.
- moisture is desorbed from the adsorbent of the first adsorption heat exchanger (51) when the air flow path is set to the first path. For this reason, after the air flow path is switched to the second path, moisture contained in the room air is adsorbed to the first adsorption heat exchanger (51).
- the refrigerant present in the first adsorption heat exchanger (51) absorbs heat of adsorption generated when moisture in the room air is adsorbed by the adsorbent, and further absorbs heat from the room air and evaporates.
- the second adsorption heat exchanger (52) outdoor air having a temperature lower than that of the indoor air flows. For this reason, the refrigerant evaporated in the first adsorption heat exchanger (51) flows into the second adsorption heat exchanger (52) and condenses. In the second adsorption heat exchanger (52), the adsorbent is heated by the condensation heat released from the refrigerant, and moisture is desorbed from the adsorbent. That is, the second adsorption heat exchanger (52) adsorbs moisture in the indoor air when the air circulation path is set to the first path, and the air circulation path is set to the second path. Sometimes releases moisture to outdoor air.
- the heat transferred from the first adsorption heat exchanger (51) by the refrigerant is released to the outdoor air. Therefore, in the second adsorption heat exchanger (52), the temperature and absolute humidity of the outdoor air passing therethrough increase. As a result, the temperature and absolute humidity of the outdoor air approach the temperature and absolute humidity of the air in the indoor space.
- the air circulation path is switched again from the second path to the first path. That is, the air passing through the first adsorption heat exchanger (51) is switched from room air to outdoor air, and the air passing through the second adsorption heat exchanger (52) is switched from outdoor air to room air.
- the adsorbent adsorbs moisture in the room air, and the refrigerant absorbs heat from the room air.
- the humidity control apparatus (10) adjusts the temperature and absolute humidity of the outdoor air supplied to the indoor space.
- the flow rate of the refrigerant flowing between the first adsorption heat exchanger (51) and the second adsorption heat exchanger (52) in the refrigerant circuit (50) during the second operation is the refrigerant circuit ( 50) less than the flow rate of refrigerant circulating.
- the humidity control capability exhibited by the humidity control device (10) during the second operation is smaller than the humidity control capability exhibited by the humidity control device (10) during the first operation.
- a second invention includes a controller (90) that adjusts an operating capacity of the compressor (53) in accordance with a humidity control load during the first operation in the first invention, and the controller (90 ) Determines that the humidity control capacity is excessive with respect to the humidity control load even if the operating capacity of the compressor (53) is set to the minimum capacity during the first operation, the humidity control device (10)
- the operation of the humidity control apparatus (10) is changed to the first operation.
- the second operation is switched to the first operation.
- the controller (90) adjusts the operating capacity of the compressor (53) according to the humidity control load.
- the humidity control capacity of the humidity control device (10) changes.
- the humidity control load means the dehumidification amount or the humidification amount required for the humidity control device (10).
- the controller (90) determines that the humidity adjustment capacity is excessive with respect to the humidity adjustment load even if the operation capacity of the compressor (53) is set to the minimum capacity during the first operation. Then, the compressor (53) is stopped and the operation of the humidity control apparatus (10) is switched to the second operation.
- the humidity control capacity of the humidity control apparatus (10) during the second operation is lower than the humidity control capacity of the humidity control apparatus (10) when the operation capacity of the compressor (53) is the minimum capacity during the first operation.
- the controller (90) activates the compressor (53) and operates the humidity controller (10). Switch to 1 operation.
- the refrigerant circuit (50) has an opening between the first adsorption heat exchanger (51) and the second adsorption heat exchanger (52).
- a variable expansion valve (55) is provided, and the expansion valve (55) is held in a fully open state during the second operation.
- the expansion valve (55) is kept fully open during the second operation.
- the gas refrigerant flows between the first adsorption heat exchanger (51) and the second adsorption heat exchanger (52).
- the switching mechanism (40) alternates the air flow path between the first path and the second path during the second operation.
- the time interval for switching to is less than the time interval for the switching mechanism (40) to alternately switch the air flow path between the first path and the second path during the first operation.
- the time interval at which the switching mechanism (40) switches the air flow path alternately between the first route and the second route is such that the time interval during the second operation is less than or equal to the time interval during the first operation. Is set. For example, when the switching mechanism (40) switches the air flow path alternately between the first path and the second path every 3 minutes during the first operation, the air flow path is switched to the time of 3 minutes or less during the second operation. The first path and the second path are alternately switched at intervals.
- the humidity controller (10) performs the first operation and the second operation.
- the humidity adjustment capability exhibited by the humidity control apparatus (10) during the second operation is smaller than the humidity adjustment capability exhibited by the humidity adjustment capability during the first operation.
- the humidity control apparatus (10) of the present invention can supply dehumidified or humidified outdoor air to the indoor space.
- the temperature and absolute humidity of the outdoor air supplied to the indoor space when the compressor (53) is stopped can be brought close to the temperature and absolute humidity of the air in the indoor space. Therefore, according to the present invention, it is possible to suppress a decrease in comfort caused by supplying outdoor air to the indoor space as it is, and to ensure the comfort of the indoor space even when the compressor (53) is stopped. be able to.
- the controller (90) performs the operation of the humidity control device (10) as the first operation and the second operation in consideration of the relationship between the humidity control capability of the humidity control device (10) and the humidity control load. Decide which mode to use for driving. Then, the controller (90) operates the humidity controller (10) for the first time when the humidity control capacity is excessive even if the humidity control capacity of the humidity controller (10) is minimized during the first operation. The operation is switched to the second operation. As described above, the humidity control capacity of the humidity control apparatus (10) during the second operation is smaller than the humidity control capacity of the humidity control apparatus (10) during the first operation. Therefore, according to the present invention, the adjustment range of the humidity control capability of the humidity control device (10) can be expanded, and the humidity control device (10) can exhibit appropriate humidity control capability according to various operating conditions. be able to.
- the expansion valve (55) is provided in the refrigerant circuit (50), and the expansion valve (55) is kept fully open during the second operation. For this reason, the flow rate of the refrigerant flowing back and forth between the first adsorption heat exchanger (51) and the second adsorption heat exchanger (52) can be sufficiently ensured during the second operation, and can be adjusted during the second operation.
- the humidity control ability exhibited by the humidity device (10) can be enhanced.
- the switching mechanism (40) switches the air flow path alternately between the first path and the second path during the second operation. It is set to be equal to or less than the time interval at which the air circulation route is alternately switched between the first route and the second route.
- the amount of moisture exchanged between the adsorption heat exchanger and the air passing through it increases rapidly in a short time after air begins to be supplied to the adsorption heat exchanger, and then gradually decreases. I will do it.
- the frequency of the switching mechanism (40) alternately switching the air flow path between the first path and the second path is the same during the first operation and during the second operation, or during the first operation. Is higher during the second operation. Therefore, according to this invention, the humidity control capability exhibited by the humidity control apparatus (10) during the second operation can be enhanced.
- FIG. 1 is a plan view, a right side view, and a left side view showing a schematic structure of a humidity control apparatus according to an embodiment.
- FIG. 2 is a piping system diagram showing the configuration of the refrigerant circuit, where (A) shows the operation during the first refrigeration cycle operation, and (B) shows the operation during the second refrigeration cycle operation.
- FIG. 3 is a schematic plan view, right side view, and left side view of the humidity control apparatus showing the air flow during the first batch operation of the dehumidifying operation.
- FIG. 4 is a schematic plan view, right side view, and left side view of the humidity control apparatus showing the air flow during the second batch operation of the dehumidifying operation.
- FIG. 1 is a plan view, a right side view, and a left side view showing a schematic structure of a humidity control apparatus according to an embodiment.
- FIG. 2 is a piping system diagram showing the configuration of the refrigerant circuit, where (A) shows the operation during the first refrigeration cycle operation, and (B)
- FIG. 5 is a schematic plan view, right side view, and left side view of the humidity control apparatus showing the air flow during the first batch operation of the humidification operation.
- FIG. 6 is a schematic plan view, right side view, and left side view of the humidity control apparatus showing the air flow during the second batch operation of the humidification operation.
- FIG. 7 is a schematic plan view, right side view, and left side view of the humidity control apparatus showing a state in which the air flow path is set to the first path during the low-capacity operation.
- FIG. 8 is a schematic plan view, right side view, and left side view of the humidity control apparatus showing a state in which the air flow path is set to the second path during the low-capacity operation.
- FIG. 9 is a piping system diagram of a refrigerant circuit showing the flow of refrigerant during low-capacity operation performed when the temperature and absolute humidity of outdoor air are higher than indoor air, and (A) shows the flow path of the air The refrigerant flow when set to the first path is shown, and (B) shows the refrigerant flow when the air circulation path is set to the second path.
- FIG. 9 shows the flow of refrigerant during low-capacity operation performed when the temperature and absolute humidity of outdoor air are higher than indoor air, and (A) shows the flow path of the air The refrigerant flow when set to the first path is shown, and (B) shows the refrigerant flow when the air circulation path is set to the second path.
- FIG. 10 is a piping system diagram of a refrigerant circuit showing the flow of refrigerant during low-capacity operation performed when the temperature and absolute humidity of outdoor air are lower than indoor air, and (A) shows the flow path of the air The refrigerant flow when set to the first path is shown, and (B) shows the refrigerant flow when the air circulation path is set to the second path.
- FIG. 11 is a flowchart showing the control operation performed by the controller.
- the humidity control apparatus (10) of the present embodiment is for adjusting the humidity of the indoor space and ventilating the indoor space, and adjusting the humidity of the taken outdoor air (OA) to the indoor space and at the same time Exhaust air (RA) into the outdoor space.
- the humidity control device (10) includes a casing (11).
- a refrigerant circuit (50) is accommodated in the casing (11).
- the refrigerant circuit (50) includes a first adsorption heat exchanger (51), a second adsorption heat exchanger (52), a compressor (53), a four-way switching valve (54), and an electric expansion valve (55). It is connected. Details of the refrigerant circuit (50) will be described later.
- the casing (11) is formed in a rectangular parallelepiped shape that is slightly flat and relatively low in height.
- the casing (11) is formed with an outside air suction port (24), an inside air suction port (23), an air supply port (22), and an exhaust port (21).
- the outside air inlet (24) and the inside air inlet (23) are provided in the back panel (13) of the casing (11).
- the outside air inlet (24) is provided in the lower part of the back panel (13).
- the inside air suction port (23) is provided in the upper part of the back panel (13).
- the air supply port (22) is provided in the first side panel (14) of the casing (11). In the first side panel (14), the air supply port (22) is disposed near the end of the casing (11) on the front panel (12) side.
- the exhaust port (21) is provided in the second side panel (15) of the casing (11). In the second side panel portion (15), the exhaust port (21) is disposed near the end portion on the front panel portion (12) side.
- an upstream divider plate (71), a downstream divider plate (72), and a central divider plate (73) are provided in the internal space of the casing (11).
- These partition plates (71 to 73) are all installed upright on the bottom plate of the casing (11), and the internal space of the casing (11) is partitioned from the bottom plate of the casing (11) to the top plate. is doing.
- the upstream divider plate (71) and the downstream divider plate (72) are parallel to the front panel portion (12) and the rear panel portion (13), and are spaced at a predetermined interval in the longitudinal direction of the casing (11). Has been placed.
- the upstream divider plate (71) is disposed closer to the rear panel portion (13).
- the downstream partition plate (72) is disposed closer to the front panel portion (12).
- the arrangement of the central partition plate (73) will be described later.
- the space between the upstream divider plate (71) and the back panel (13) is divided into two upper and lower spaces, and the upper space forms the inside air passage (32).
- the lower space constitutes the outside air passage (34).
- the inside air passage (32) communicates with the indoor space through a duct connected to the inside air suction port (23).
- the outside air passage (34) communicates with the outdoor space via a duct connected to the outside air inlet (24).
- an inside air filter (27), an inside air temperature sensor (91), and an inside air humidity sensor (92) are installed.
- the room air temperature sensor (91) measures the temperature of the room air flowing through the room air side passage (32).
- the room air humidity sensor (92) measures the relative humidity of the room air flowing through the room air side passage (32).
- an outside air filter (28), an outside air temperature sensor (93), and an outside air humidity sensor (94) are installed in the outside air passage (34).
- the outside air temperature sensor (93) measures the temperature of the outdoor air flowing through the outside air passage (34).
- the outside air humidity sensor (94) measures the relative humidity of the outdoor air flowing through the outside air passage (34). 3 to 8, the inside air temperature sensor (91), the inside air humidity sensor (92), the outside air temperature sensor (93), and the outside air humidity sensor (94) are not shown.
- the space between the upstream divider plate (71) and the downstream divider plate (72) in the casing (11) is divided into left and right by the central divider plate (73), and is located on the right side of the central divider plate (73).
- the space constitutes the first heat exchanger chamber (37), and the space on the left side of the central partition plate (73) constitutes the second heat exchanger chamber (38).
- a first adsorption heat exchanger (51) is accommodated in the first heat exchanger chamber (37).
- the second adsorption heat exchanger (52) is accommodated in the second heat exchanger chamber (38).
- the electric expansion valve (55) of a refrigerant circuit (50) is accommodated in the 1st heat exchanger chamber (37).
- Each adsorption heat exchanger (51, 52) has an adsorbent supported on the surface of a so-called cross fin type fin-and-tube heat exchanger.
- Each adsorption heat exchanger (51, 52) is formed in the shape of a rectangular thick plate or a flat rectangular parallelepiped as a whole.
- Each adsorption heat exchanger (51, 52) has a front face and a rear face parallel to the upstream partition plate (71) and the downstream partition plate (72), and the heat exchanger chamber (37, 38). It is installed in a standing state.
- the space along the front surface of the downstream partition plate (72) is partitioned vertically, and the upper portion of the vertically partitioned space is the air supply side passage ( 31), and the lower part constitutes the exhaust side passage (33).
- the upstream partition plate (71) is provided with four open / close dampers (41-44).
- Each of the dampers (41 to 44) is generally formed in a horizontally long rectangular shape. Specifically, in a part (upper part) facing the room air passage (32) in the upstream partition (71), the first room air damper (41) is attached to the right side of the central partition (73). The second inside air damper (42) is attached to the left side of the central partition plate (73). Moreover, in the part (lower part) which faces an external air side channel
- the four dampers (41 to 44) provided on the upstream partition plate (71) constitute a switching mechanism (40) for switching the air flow path.
- the open side damper (72) has four open / close dampers (45 to 48). Each of the dampers (45 to 48) is generally formed in a horizontally long rectangular shape. Specifically, in the part (upper part) facing the supply side passageway (31) in the downstream partition plate (72), the first supply side damper (45) is located on the right side of the central partition plate (73). The second air supply side damper (46) is attached to the left side of the central partition plate (73). Moreover, in the part (lower part) which faces an exhaust side channel
- the four dampers (45 to 48) provided on the downstream partition plate (72) constitute a switching mechanism (40) for switching the air flow path.
- the space between the air supply side passage (31) and the exhaust side passage (33) and the front panel portion (12) is divided into left and right by the partition plate (77).
- the space on the right side of (77) constitutes the air supply fan chamber (36), and the space on the left side of the partition plate (77) constitutes the exhaust fan chamber (35).
- the air supply fan (26) is accommodated in the air supply fan room (36).
- the exhaust fan chamber (35) accommodates an exhaust fan (25).
- the supply fan (26) and the exhaust fan (25) are both centrifugal multiblade fans (so-called sirocco fans).
- the air supply fan (26) blows out the air sucked from the downstream side partition plate (72) side to the air supply port (22).
- the exhaust fan (25) blows out the air sucked from the downstream partition plate (72) side to the exhaust port (21).
- a compressor (53) and a four-way switching valve (54) of the refrigerant circuit (50) are accommodated in the air supply fan chamber (36).
- the compressor (53) and the four-way selector valve (54) are disposed between the air supply fan (26) and the partition plate (77) in the air supply fan chamber (36).
- the refrigerant circuit (50) includes a first adsorption heat exchanger (51), a second adsorption heat exchanger (52), a compressor (53), a four-way switching valve (54), and an electric expansion. It is a closed circuit provided with a valve (55).
- the refrigerant circuit (50) performs a vapor compression refrigeration cycle by circulating the filled refrigerant.
- the refrigerant circuit (50) is provided with a plurality of temperature sensors and pressure sensors.
- the compressor (53) has its discharge side connected to the first port of the four-way switching valve (54) and its suction side connected to the second port of the four-way switching valve (54). .
- a two-adsorption heat exchanger (52) is arranged.
- the four-way switching valve (54) includes a first state (the state shown in FIG. 2A) in which the first port and the third port communicate with each other and the second port and the fourth port communicate with each other.
- the second port and the fourth port can communicate with each other, and the second port and the third port can communicate with each other in the second state (the state shown in FIG. 2B).
- the compressor (53) is a hermetic compressor in which a compression mechanism and an electric motor that drives the compression mechanism are housed in a single casing. Alternating current is supplied to the electric motor of the compressor (53) via an inverter. When the output frequency of the inverter (that is, the operating frequency of the compressor) is changed, the rotational speed of the electric motor and the compression mechanism driven thereby changes, and the operating capacity of the compressor (53) changes.
- the humidity control device (10) is provided with a controller (90) which is a controller (see FIG. 2).
- the controller (90) receives the measured values of the inside air humidity sensor (92), the inside air temperature sensor (91), the outside air humidity sensor (94), and the outside air temperature sensor (93).
- the controller (90) receives measurement values of a temperature sensor and a pressure sensor provided in the refrigerant circuit (50). The controller (90) controls the operation of the humidity controller (10) based on these input measurement values.
- the controller (90) switches the operation of the humidity control device (10) to a dehumidifying operation, a humidifying operation, a low capacity operation and a simple ventilation operation, which will be described later.
- the controller (90) operates the dampers (41 to 48), the fans (25, 26), the compressor (53), the electric expansion valve (55), and the four-way switching valve (54). To control the operation.
- the humidity control apparatus (10) of the present embodiment selectively performs a dehumidifying operation, a humidifying operation, a low-capacity operation, and a simple ventilation operation.
- the dehumidifying operation and the humidifying operation are first operations in which the compressor (53) operates and the switching mechanism (40) switches the air flow path.
- the low-capacity operation is a second operation in which the compressor (53) stops and the switching mechanism (40) switches the air flow path.
- the simple ventilation operation is an operation in which both the compressor (53) and the switching mechanism (40) are stopped.
- the air supply fan (26) and the exhaust fan (25) are operated. Then, the humidity control apparatus (10) supplies the taken outdoor air (OA) to the indoor space as supply air (SA), and discharges the taken indoor air (RA) to the outdoor space as exhaust air (EA).
- ⁇ Dehumidifying operation> In the humidity control apparatus (10) during the dehumidifying operation, outdoor air is taken as first air from the outside air inlet (24) into the casing (11), and indoor air is taken from the inside air inlet (23) into the casing (11). Is taken in as secondary air. In the refrigerant circuit (50), the compressor (53) operates to adjust the opening of the electric expansion valve (55). Then, the humidity control apparatus (10) during the dehumidifying operation alternately repeats a first batch operation and a second batch operation described later for 3 minutes each.
- the switching mechanism (40) sets the air flow path to the second path. Specifically, the first inside air damper (41), the second outside air side damper (44), the second air supply side damper (46), and the first exhaust side damper (47) are opened, and the second inside air The side damper (42), the first outside air damper (43), the first air supply side damper (45), and the second exhaust side damper (48) are closed.
- the refrigerant circuit (50) performs the first refrigeration cycle operation. That is, in the refrigerant circuit (50), the four-way switching valve (54) is set to the first state (the state shown in FIG. 2 (A)), and the first adsorption heat exchanger (51) serves as the condenser and is the second.
- the adsorption heat exchanger (52) serves as an evaporator.
- the second adsorption heat exchanger (52) moisture in the first air is adsorbed by the adsorbent, and the heat of adsorption generated at that time is absorbed by the refrigerant.
- the first air dehumidified in the second adsorption heat exchanger (52) flows through the second air supply damper (46) into the air supply passage (31) and passes through the air supply fan chamber (36). Later, the air is supplied to the indoor space through the air supply port (22).
- the second air given moisture in the first adsorption heat exchanger (51) flows into the exhaust side passage (33) through the first exhaust side damper (47) and passes through the exhaust fan chamber (35). It is discharged to the outdoor space through the exhaust port (21).
- the switching mechanism (40) sets the air flow path to the first path. Specifically, the second inside air damper (42), the first outside air side damper (43), the first air supply side damper (45), and the second exhaust side damper (48) are opened, and the first inside air is discharged. The side damper (41), the second outside air side damper (44), the second air supply side damper (46), and the first exhaust side damper (47) are closed.
- the refrigerant circuit (50) performs the second refrigeration cycle operation. That is, in the refrigerant circuit (50), the four-way switching valve (54) is set to the second state (the state shown in FIG. 2B), and the first adsorption heat exchanger (51) serves as the evaporator and is the second.
- the adsorption heat exchanger (52) serves as a condenser.
- the first adsorption heat exchanger (51) moisture in the first air is adsorbed by the adsorbent, and the adsorption heat generated at that time is absorbed by the refrigerant.
- the first air dehumidified in the first adsorption heat exchanger (51) flows into the supply air passage (31) through the first supply air damper (45) and passes through the supply air fan chamber (36). Later, the air is supplied to the indoor space through the air supply port (22).
- the second adsorption heat exchanger (52) moisture is desorbed from the adsorbent heated by the refrigerant, and the desorbed moisture is given to the second air.
- the second air given moisture in the second adsorption heat exchanger (52) flows into the exhaust side passage (33) through the second exhaust side damper (48) and passes through the exhaust fan chamber (35). It is discharged to the outdoor space through the exhaust port (21).
- the switching mechanism (40) sets the air circulation route to the first route. Specifically, the second inside air damper (42), the first outside air side damper (43), the first air supply side damper (45), and the second exhaust side damper (48) are opened, and the first inside air is discharged. The side damper (41), the second outside air side damper (44), the second air supply side damper (46), and the first exhaust side damper (47) are closed.
- the refrigerant circuit (50) performs the first refrigeration cycle operation. That is, in the refrigerant circuit (50), the four-way switching valve (54) is set to the first state (the state shown in FIG. 2 (A)), and the first adsorption heat exchanger (51) serves as the condenser and is the second.
- the adsorption heat exchanger (52) serves as an evaporator.
- the second adsorption heat exchanger (52) moisture in the first air is adsorbed by the adsorbent, and the heat of adsorption generated at that time is absorbed by the refrigerant.
- the first air deprived of moisture in the second adsorption heat exchanger (52) flows into the exhaust side passage (33) through the second exhaust side damper (48) and passes through the exhaust fan chamber (35). It is discharged to the outdoor space through the exhaust port (21).
- the first adsorption heat exchanger (51) moisture is desorbed from the adsorbent heated by the refrigerant, and the desorbed moisture is given to the second air.
- the second air humidified in the first adsorption heat exchanger (51) flows into the supply air passage (31) through the first supply air damper (45) and passes through the supply air fan chamber (36). Later, the air is supplied to the indoor space through the air supply port (22).
- the switching mechanism (40) sets the air circulation route to the second route. Specifically, the first inside air damper (41), the second outside air side damper (44), the second air supply side damper (46), and the first exhaust side damper (47) are opened, and the second inside air The side damper (42), the first outside air damper (43), the first air supply side damper (45), and the second exhaust side damper (48) are closed.
- the refrigerant circuit (50) performs the second refrigeration cycle operation. That is, in the refrigerant circuit (50), the four-way switching valve (54) is set to the second state (the state shown in FIG. 2B), and the first adsorption heat exchanger (51) serves as the evaporator and is the second.
- the adsorption heat exchanger (52) serves as a condenser.
- the first adsorption heat exchanger (51) moisture in the first air is adsorbed by the adsorbent, and the adsorption heat generated at that time is absorbed by the refrigerant.
- the first air deprived of moisture in the first adsorption heat exchanger (51) flows into the exhaust side passage (33) through the first exhaust side damper (47) and passes through the exhaust fan chamber (35). It is discharged to the outdoor space through the exhaust port (21).
- the second adsorption heat exchanger (52) moisture is desorbed from the adsorbent heated by the refrigerant, and the desorbed moisture is given to the second air.
- the second air humidified in the second adsorption heat exchanger (52) flows into the supply air passage (31) through the second supply air damper (46) and passes through the supply air fan chamber (36). Later, the air is supplied to the indoor space through the air supply port (22).
- the switching mechanism (40) switches the air flow path.
- the switching mechanism (40) switches the air flow path alternately between the first path and the second path every 3 minutes. That is, the time interval at which the switching mechanism (40) switches the air flow path during the low-capacity operation is the same as the time interval at which the switching mechanism (40) switches the air flow path during the dehumidifying operation. Since the compressor (53) is stopped, the four-way switching valve (54) may be in either the first state or the second state.
- the switching mechanism (40) sets the air flow path to the first path
- the air-side damper (45) and the second exhaust-side damper (48) are opened, and the first inside air-side damper (41), the second outside air-side damper (44), the second air-supply-side damper (46), and The first exhaust side damper (47) is closed.
- outdoor air is supplied to indoor space after passing a 1st adsorption heat exchanger (51), and indoor air is discharged
- the switching mechanism (40) sets the air flow path to the second path
- the air supply side damper (46) and the first exhaust side damper (47) are opened, the second inside air side damper (42), the first outside air side damper (43), and the first air supply side damper (45).
- the 2nd exhaust side damper (48) will be in a closed state.
- the outdoor air is supplied to the indoor space after passing through the second adsorption heat exchanger (52), and the indoor air is discharged to the outdoor space after passing through the first adsorption heat exchanger (51).
- the low-capacity operation of the humidity control apparatus (10) will be described by taking as an example a case where the temperature and absolute humidity of the outdoor air are slightly higher than the room air (for example, when the room is cooled in late spring or early autumn). .
- the humidity control apparatus (10) during the low-performance operation, the outdoor air supplied to the indoor space is cooled and dehumidified.
- the reason will be described with reference to FIG.
- the explanation starts from the state where the air circulation route is set to the first route. As shown in FIG. 9A, in this state, outdoor air passes through the first adsorption heat exchanger (51), and indoor air passes through the second adsorption heat exchanger (52).
- the liquid refrigerant remains in the first adsorption heat exchanger (51).
- the liquid refrigerant present in the first adsorption heat exchanger (51) generates adsorption heat generated when moisture in the outdoor air is adsorbed by the adsorbent. It absorbs and absorbs heat from the outdoor air and evaporates.
- the refrigerant evaporated in the first adsorption heat exchanger (51) passes through the electric expansion valve (55), and then flows into the second adsorption heat exchanger (52) to condense.
- the adsorbent is heated by the heat of condensation released from the refrigerant, and moisture is desorbed from the adsorbent and applied to the room air.
- the heat conveyed from the first adsorption heat exchanger (51) by the refrigerant is released to the indoor air.
- the air circulation path is switched from the first path to the second path. That is, as shown in FIG. 9B, the air passing through the first adsorption heat exchanger (51) is switched from the outdoor air to the room air, and the air passing through the second adsorption heat exchanger (52) is changed into the room air. Switch from air to outdoor air.
- the refrigerant evaporated in the second adsorption heat exchanger (52) passes through the electric expansion valve (55), and then flows into the first adsorption heat exchanger (51) to condense.
- the adsorbent is heated by the condensation heat released from the refrigerant, and moisture is desorbed from the adsorbent. That is, the first adsorption heat exchanger (51) adsorbs moisture in outdoor air when the air circulation path is set to the first path, and the air circulation path is set to the second path. Sometimes releases moisture into room air. Further, in the first adsorption heat exchanger (51), the heat transferred from the second adsorption heat exchanger (52) by the refrigerant is released to the indoor air.
- the air circulation path is switched again from the second path to the first path. That is, as shown in FIG. 9A, air passing through the first adsorption heat exchanger (51) is switched from indoor air to outdoor air, and air passing through the second adsorption heat exchanger (52) is outdoor. Switch from air to room air.
- the outdoor air is cooled and dehumidified in the first adsorption heat exchanger (51). That is, the first adsorption heat exchanger (51) that has released moisture to the indoor air in the state shown in FIG. 9B adsorbs moisture in the outdoor air. Moreover, the refrigerant
- the low-capacity operation of the humidity control apparatus (10) will be described by taking as an example the case where the temperature and absolute humidity of the outdoor air are slightly lower than the indoor air (for example, when the room is heated in early spring or late autumn) To do.
- the humidity control apparatus (10) during the low-capacity operation, the outdoor air supplied to the indoor space is heated and humidified.
- the reason will be described with reference to FIG.
- the explanation starts from the state where the air circulation route is set to the first route. As shown in FIG. 10A, in this state, outdoor air passes through the first adsorption heat exchanger (51), and indoor air passes through the second adsorption heat exchanger (52).
- the liquid refrigerant remains in the second adsorption heat exchanger (52).
- the liquid refrigerant present in the second adsorption heat exchanger (52) generates adsorption heat generated when moisture in the indoor air is adsorbed by the adsorbent. It absorbs and absorbs heat from room air and evaporates.
- the refrigerant evaporated in the second adsorption heat exchanger (52) flows into the first adsorption heat exchanger (51) and condenses.
- the adsorbent is heated by the heat of condensation released from the refrigerant, and moisture is desorbed from the adsorbent and applied to the outdoor air.
- the heat transferred from the second adsorption heat exchanger (52) by the refrigerant is released to the outdoor air.
- the air circulation path is switched from the first path to the second path. That is, as shown in FIG. 10B, the air passing through the first adsorption heat exchanger (51) is switched from the outdoor air to the indoor air, and the air passing through the second adsorption heat exchanger (52) is changed into the room air. Switch from air to outdoor air.
- the air flow path is set to the first path (the state shown in FIG. 10A)
- moisture is desorbed from the adsorbent of the first adsorption heat exchanger (51).
- the refrigerant present in the first adsorption heat exchanger (51) absorbs heat of adsorption generated when moisture in the room air is adsorbed by the adsorbent, and further absorbs heat from the room air and evaporates.
- the second adsorption heat exchanger (52) outdoor air having a temperature lower than that of the indoor air flows. For this reason, the refrigerant evaporated in the first adsorption heat exchanger (51) passes through the electric expansion valve (55), and then flows into the second adsorption heat exchanger (52) to condense. In the second adsorption heat exchanger (52), the adsorbent is heated by the condensation heat released from the refrigerant, and moisture is desorbed from the adsorbent. That is, the second adsorption heat exchanger (52) adsorbs moisture in the indoor air when the air circulation path is set to the first path, and the air circulation path is set to the second path. Sometimes releases moisture to outdoor air.
- the heat transferred from the first adsorption heat exchanger (51) by the refrigerant is released to the outdoor air. Therefore, in the second adsorption heat exchanger (52), the temperature and absolute humidity of the outdoor air passing therethrough increase. As a result, the temperature and absolute humidity of the outdoor air approach the temperature and absolute humidity of the air in the indoor space.
- the air circulation path is switched again from the second path to the first path. That is, as shown in FIG. 10 (A), air passing through the first adsorption heat exchanger (51) is switched from indoor air to outdoor air, and air passing through the second adsorption heat exchanger (52) is outdoor. Switch from air to room air.
- the adsorbent adsorbs moisture in the room air, and the refrigerant absorbs heat from the room air. That is, the second adsorption heat exchanger (52) takes moisture and heat from the indoor air.
- the first adsorption heat exchanger (51) imparts moisture taken from the room air to the outdoor air in the state shown in FIG.
- coolant from the 2nd adsorption heat exchanger (52) is provided to outdoor air.
- the temperature and absolute humidity of the outdoor air approach the temperature and absolute humidity of the air in the indoor space.
- the humidity control device (10) adjusts the temperature and absolute humidity of the outdoor air supplied to the indoor space.
- the compressor (53) is operated at the flow rate of the refrigerant flowing between the first adsorption heat exchanger (51) and the second adsorption heat exchanger (52). Less than the flow rate of the refrigerant circulating in the refrigerant circuit (50) during the dehumidifying operation or the humidifying operation.
- the dehumidifying ability exhibited by the humidity control apparatus (10) during the low capacity operation is smaller than the dehumidifying ability exhibited by the humidity control apparatus (10) during the dehumidifying operation.
- the humidifying ability exhibited by the humidity control apparatus (10) during low-capacity operation is smaller than the humidification ability exhibited by the humidity control apparatus (10) during humidification operation.
- the switching mechanism (40) is stopped, and the air flow path is fixed to either the first path or the second path.
- the air circulation path is set to the first path, outdoor air and room air flow in the humidity control apparatus (10) as shown in FIG. That is, the outdoor air is supplied to the indoor space after passing through the first adsorption heat exchanger (51), and the indoor air is discharged to the outdoor space after passing through the second adsorption heat exchanger (52).
- the air circulation path is set to the second path, outdoor air and room air flow in the humidity control apparatus (10) as shown in FIG. That is, outdoor air is supplied to the indoor space after passing through the second adsorption heat exchanger (52), and indoor air is discharged to the outdoor space after passing through the first adsorption heat exchanger (51).
- the switching mechanism (40) switches the air flow path every predetermined time during the low-capacity operation
- the switching mechanism (40) stops and the air flow path is fixed during the simple ventilation operation.
- the adsorption heat exchanger (51, 52) does not exchange moisture or heat with the air passing therethrough. Therefore, the outdoor air is supplied to the indoor space as it is without adjusting the temperature and humidity. Further, the room air is discharged to the outdoor space as it is without adjusting the temperature and humidity.
- Controller control action- A control operation performed by the controller (90) will be described.
- the operation in which the controller (90) selects the operation mode of the humidity controller (10) will be described with reference to the flowchart of FIG.
- the controller (90) repeatedly performs the control operation shown in FIG. 11 every time a predetermined time (for example, 2 minutes) elapses.
- step ST1 the controller (90) calculates a target value (target absolute humidity: X_tg) of the absolute humidity of the air supplied to the indoor space from the air supply port (23). At that time, the controller (90) uses the set value X_set of the absolute humidity of the air in the indoor space, the absolute humidity X_oa of the outdoor air, and the absolute humidity X_ra of the indoor air, and the absolute humidity X_ra of the indoor air is the absolute humidity.
- the value of the target absolute humidity X_tg is set so as to be the set value X_set.
- the controller (90) calculates the absolute humidity X_oa of the outdoor air using the measured values of the outside temperature sensor (93) and the outside air humidity sensor (94), and the inside air temperature sensor (91) and the inside air humidity sensor (92) The absolute humidity X_ra of the indoor air is calculated using the measured value.
- the controller (90) calculates the required operating frequency F_n of the compressor (53). At that time, the controller (90) is supplied to the indoor space from the air supply port (23) using the target absolute humidity X_tg calculated in step ST1, the absolute humidity X_oa of the outdoor air, and the absolute humidity X_ra of the indoor air.
- the operating frequency of the compressor (53) is calculated so that the absolute humidity of the air becomes the target absolute humidity X_tg, and the value is set as the required operating frequency F_n.
- the operating capacity of the compressor (53) increases as the operating frequency increases, and decreases as the operating frequency decreases.
- the mass flow rate of the refrigerant circulating in the refrigerant circuit (50) increases, and the heat absorption amount and heat release amount of the refrigerant per unit time in the adsorption heat exchanger (51, 52) are increased.
- the amount of moisture adsorbed on the adsorption heat exchanger (51, 52) serving as an evaporator increases, and the amount of moisture desorbed from the adsorption heat exchanger (51, 52) serving as a radiator is increased.
- the amount increases. That is, the humidity control capacity of the humidity control apparatus (10) is increased.
- the controller (90) adjusts the operating frequency of the compressor (53) so that the absolute humidity of the air supplied from the humidity controller (10) to the indoor space becomes the target absolute humidity X_tg.
- the controller (90) calculates the minimum operating frequency F_min of the compressor (53). At that time, the controller (90) calculates the lower limit value of the operating frequency of the compressor (53) using the outdoor air temperature T_oa and the absolute humidity X_oa and the indoor air temperature T_ra and the absolute humidity X_ra. Is the minimum operating frequency F_min. In order to ensure the reliability of the compressor (53), it is necessary to keep the operating conditions of the compressor (53) such as the difference between the suction pressure and the discharge pressure within a predetermined range. Therefore, the controller (90) sets the minimum operating frequency F_min of the compressor (53) so that the operating condition of the compressor (53) is within a predetermined range.
- the controller (90) determines whether or not the absolute humidity X_oa of the outdoor air is a value within the set humidity range (that is, whether or not the condition X_set1 ⁇ X_oa ⁇ X_set2 is satisfied).
- X_set1 is a lower limit value of the setting range of the absolute humidity of the air in the indoor space
- X_set2 is an upper limit value of the setting range of the absolute humidity of the air in the indoor space.
- step ST4 When the condition of step ST4 is satisfied, the absolute humidity of the indoor air is kept within the set range even if the outdoor air is supplied to the indoor space as it is. Therefore, when this condition is satisfied, the controller (90) performs the operation of step ST5. That is, in this case, the controller (90) sets the operation of the humidity control device (10) to the simple ventilation operation.
- step ST4 when the condition of step ST4 is not satisfied, if the outdoor air is supplied to the indoor space as it is, the absolute humidity of the air in the indoor space is out of the set range. Therefore, if this condition is not satisfied, the controller (90) performs the operation of step ST6.
- step ST6 the controller (90) compares the required operating frequency F_n of the compressor (53) calculated in step ST2 with the minimum operating frequency F_min of the compressor (53) calculated in step ST3. Specifically, the controller (90) determines whether or not a condition of F_n ⁇ F_min ⁇ A is satisfied.
- A is a constant less than 1.0, and is set to 0.5, for example.
- step ST6 the controller (90) performs the operation of step ST7.
- the absolute humidity X_oa of the outdoor air is out of the set humidity range, and the required operating frequency F_n of the compressor (53) is a relatively high value. It can be determined that the humidity control capacity required for (10) (ie, the humidity control load) is large to some extent. Therefore, in step ST7, the controller (90) sets the operation of the humidity control apparatus (10) to one of the dehumidifying operation and the humidifying operation. At that time, the controller (90) selects either the dehumidifying operation or the humidifying operation based on the setting information input by the user to the remote controller or the like, the absolute humidity of the indoor or outdoor air, and the like.
- step ST6 when the condition of step ST6 is satisfied during the low-capacity operation, it can be determined that the humidity control of the humidity control apparatus (10) is too small with respect to the humidity control load. Therefore, when the condition of step ST6 is satisfied during the low-capacity operation, the controller (90) starts the compressor (53), and the operation of the humidity control device (10) is changed from the low-capacity operation to the dehumidifying operation or the humidifying operation. Switch.
- step ST6 when the condition of step ST6 is not satisfied, the controller (90) performs the operation of step ST8.
- the absolute humidity X_oa of the outdoor air is out of the set humidity range, but the required operating frequency F_n of the compressor (53) is a relatively low value, and the humidity control device ( It can be judged that the humidity control capacity of 10) is excessive with respect to the humidity control load. Therefore, in step ST8, the controller (90) sets the operation of the humidity controller (10) to the low-capacity operation.
- the controller (90) sets the operating frequency F of the compressor (53) to the minimum operating frequency F_min.
- Set (F F_min).
- the controller (90) stops the compressor (53) and switches the operation of the humidity control apparatus (10) from the dehumidifying operation or the humidifying operation to the low-capacity operation.
- the humidity control apparatus (10) of the present embodiment includes a dehumidifying operation and a humidifying operation in which both the compressor (53) and the switching mechanism (40) are operated, and the switching mechanism (40) is stopped when the compressor (53) is stopped. Perform low-capacity operation that operates. As described above, the humidity control capability exhibited by the humidity control device (10) during the low-capacity operation is smaller than the humidity control capability exhibited by the humidity control device (10) during the dehumidification operation or the humidification operation.
- the conventional humidity control device (10) that does not perform the low-capacity operation stops the dehumidification operation or the humidification operation when the humidity adjustment capacity obtained in the dehumidification operation or the humidification operation becomes excessive with respect to the humidity adjustment load.
- Simple ventilation operation was performed.
- the humidity control capacity of the humidity control device (10) is excessive with respect to the humidity control load, there is usually a certain temperature difference and absolute humidity difference between the air in the outdoor space and the air in the indoor space. Exists.
- the humidity control apparatus (10) of the present embodiment can execute the low-capacity operation.
- the humidity control apparatus (10) performs the low capacity operation by stopping the dehumidifying operation and the humidifying operation. Outdoor air is supplied to the indoor space as it is during simple ventilation operation, but outdoor air is supplied to the indoor space after its temperature and absolute humidity are adjusted during low-performance operation.
- the humidity control capability of the humidity control apparatus (10) becomes excessive with respect to the humidity control load, and the dehumidifying operation and the humidifying operation must be stopped.
- the temperature and absolute humidity of the outdoor air supplied to the indoor space can be brought close to the temperature and absolute humidity of the air in the indoor space. Therefore, according to the present embodiment, it is possible to avoid a decrease in comfort caused by supplying outdoor air to the indoor space as it is, and to improve the comfort of the indoor space even under operating conditions where the dehumidifying operation or the humidifying operation must be stopped. Sex can be secured.
- the compressor (53) may be frequently stopped and restarted. That is, when the compressor (53) stops and the humidity control capacity of the humidity control device (10) becomes zero, outdoor air is supplied to the indoor space as it is, and the humidity of the indoor air changes, and the compressor (53) It will be restarted. When the compressor (53) is restarted, the humidity of the room air reaches the target value in a relatively short time, and the compressor (53) is stopped again. And if a stop and restart of a compressor (53) are repeated frequently, possibility that a compressor (53) will be damaged becomes high.
- the humidity control apparatus (10) of the present embodiment is an operation in which the humidity control capacity of the humidity control apparatus (10) becomes excessive with respect to the humidity control load, and the dehumidifying operation and the humidifying operation must be stopped. Even if the conditions are met, the low capacity operation is performed and the outdoor air supplied to the indoor space is continuously dehumidified or humidified. For this reason, even after the compressor (53) is stopped, a rapid change in the humidity of the room air is suppressed, and it is possible to earn time until the compressor (53) needs to be restarted. Therefore, according to this embodiment, frequent start / stop of the compressor (53) can be avoided, and the reliability of the compressor (53) can be improved.
- the electric expansion valve (55) is kept fully open in the refrigerant circuit (50) during the low capacity operation. For this reason, the flow rate of the refrigerant flowing back and forth between the first adsorption heat exchanger (51) and the second adsorption heat exchanger (52) can be sufficiently secured during the low-capacity operation.
- the humidity control ability exhibited by the humidity device (10) can be enhanced.
- the time interval at which the switching mechanism (40) switches the air flow path during the low-performance operation is the time for the switching mechanism (40) to switch the air flow path during the dehumidifying operation. It may be shorter than the interval. That is, in this embodiment, the time interval at which the switching mechanism (40) switches the air flow path during the low-capacity operation may be set to less than 3 minutes.
- the amount of moisture exchanged between the adsorption heat exchanger (51, 52) and the air passing therethrough is a short time after the air starts to be supplied to the adsorption heat exchanger (51, 52). It increases rapidly and then gradually decreases.
- the frequency of the switching mechanism (40) alternately switching the air flow path between the first path and the second path is lower than that during the dehumidifying operation. Is higher. Therefore, according to this modification, the humidity control capability exhibited by the humidity control apparatus (10) during low-capacity operation can be increased.
- the opening degree of the electric expansion valve (55) of the refrigerant circuit (50) does not have to be fully opened during the low capacity operation. That is, the opening degree of the electric expansion valve (55) during the low-capacity operation can sufficiently secure the flow rate of the refrigerant that goes back and forth between the first adsorption heat exchanger (51) and the second adsorption heat exchanger (52). It is only necessary to set the opening degree to a certain degree, and it is not always necessary to maintain the fully opened state.
- the present invention is useful for a humidity control apparatus that performs dehumidification and humidification of air using an adsorption heat exchanger carrying an adsorbent.
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Abstract
Description
調湿装置(10)について、図1を参照しながら説明する。なお、ここでの説明で用いる「上」「下」「左」「右」「前」「後」「手前」「奥」は、特にことわらない限り、調湿装置(10)を前面側から見た場合の方向を意味している。
図2に示すように、冷媒回路(50)は、第1吸着熱交換器(51)、第2吸着熱交換器(52)、圧縮機(53)、四方切換弁(54)、及び電動膨張弁(55)が設けられた閉回路である。この冷媒回路(50)は、充填された冷媒を循環させることによって、蒸気圧縮冷凍サイクルを行う。また、図示しないが、冷媒回路(50)には、複数の温度センサ及び圧力センサが取り付けられている。
調湿装置(10)には、制御器であるコントローラ(90)が設けられている(図2を参照)。コントローラ(90)には、内気湿度センサ(92)、内気温度センサ(91)、外気湿度センサ(94)、及び外気温度センサ(93)の計測値が入力されている。また、コントローラ(90)には、冷媒回路(50)に設けられた温度センサや圧力センサの計測値が入力されている。コントローラ(90)は、入力されたこれらの計測値に基づいて、調湿装置(10)の運転制御を行う。
本実施形態の調湿装置(10)は、除湿運転と、加湿運転と、低能力運転と、単純換気運転とを選択的に行う。除湿運転および加湿運転は、圧縮機(53)が作動し且つ切換機構(40)が空気の流通経路を切り換える第1運転である。低能力運転は、圧縮機(53)が停止し且つ切換機構(40)が空気の流通経路を切り換える第2運転である。単純換気運転は、圧縮機(53)と切換機構(40)の両方が停止する運転である。
除湿運転中の調湿装置(10)では、室外空気が外気吸込口(24)からケーシング(11)内へ第1空気として取り込まれ、室内空気が内気吸込口(23)からケーシング(11)内へ第2空気として取り込まれる。また、冷媒回路(50)では、圧縮機(53)が作動し、電動膨張弁(55)の開度が調節される。そして、除湿運転中の調湿装置(10)は、後述する第1バッチ動作と第2バッチ動作を3分間ずつ交互に繰り返し行う。
加湿運転中の調湿装置(10)では、室外空気が外気吸込口(24)からケーシング(11)内へ第2空気として取り込まれ、室内空気が内気吸込口(23)からケーシング(11)内へ第1空気として取り込まれる。また、冷媒回路(50)では、圧縮機(53)が作動し、電動膨張弁(55)の開度が調節される。そして、加湿運転中の調湿装置(10)は、後述する第1バッチ動作と第2バッチ動作を4分間隔で交互に繰り返し行う。
低能力運転中の調湿装置(10)では、冷媒回路(50)の圧縮機(53)が停止し、電動膨張弁(55)が全開状態に保持される。また、低能力運転中の調湿装置(10)では、切換機構(40)が空気の流通経路を切り換える。切換機構(40)は、空気の流通経路を、3分間毎に第1経路と第2経路に交互に切り換える。つまり、低能力運転中に切換機構(40)が空気の流通経路を切り換える時間間隔は、除湿運転中に切換機構(40)が空気の流通経路を切り換える時間間隔と同じである。なお、圧縮機(53)は停止しているため、四方切換弁(54)は第1状態と第2状態のどちらであっても構わない。
単純換気運転中の調湿装置(10)では、冷媒回路(50)の圧縮機(53)が停止する。また、電動膨張弁(55)は、通常、全閉状態に保持される。
コントローラ(90)が行う制御動作について説明する。ここでは、コントローラ(90)が調湿装置(10)の運転モードを選択する動作について、図11のフロー図を参照しながら説明する。コントローラ(90)は、図11に示す制御動作を、所定の時間(例えば2分間)が経過する毎に繰り返し行う。
本実施形態の調湿装置(10)は、圧縮機(53)と切換機構(40)の両方が作動する除湿運転および加湿運転と、圧縮機(53)が停止して切換機構(40)が作動する低能力運転とを行う。上述したように、低能力運転中に調湿装置(10)が発揮する調湿能力は、除湿運転中や加湿運転中に調湿装置(10)が発揮する調湿能力に比べて小さい。
本実施形態の調湿装置(10)において、低能力運転中に切換機構(40)が空気の流通経路を切り換える時間間隔は、除湿運転中に切換機構(40)が空気の流通経路を切り換える時間間隔よりも短くてもよい。つまり、本実施形態では、低能力運転中に切換機構(40)が空気の流通経路を切り換える時間間隔が3分未満に設定されていてもよい。
25 排気ファン
26 給気ファン
40 切換機構
50 冷媒回路
51 第1吸着熱交換器
52 第2吸着熱交換器
53 圧縮機
55 電動膨張弁(膨張弁)
90 コントローラ(制御器)
Claims (4)
- 圧縮機(53)と、それぞれが吸着剤を担持する第1吸着熱交換器(51)及び第2吸着熱交換器(52)とを有し、上記第1吸着熱交換器(51)が放熱器となって上記第2吸着熱交換器(52)が蒸発器となる第1冷凍サイクル動作と、上記第2吸着熱交換器(52)が放熱器となって上記第1吸着熱交換器(51)が蒸発器となる第2冷凍サイクル動作とを行う冷媒回路(50)と、
室外空気を室内空間へ供給するための給気ファン(26)と、
室内空気を室外空間へ排出するための排気ファン(25)と、
空気の流通経路を、室外空気が上記第1吸着熱交換器(51)を通過後に室内空間へ供給されて室内空気が上記第2吸着熱交換器(52)を通過後に室外空間へ排出される第1経路と、室外空気が上記第2吸着熱交換器(52)を通過後に室内空間へ供給されて室内空気が上記第1吸着熱交換器(51)を通過後に室外空間へ排出される第2経路とに切り換える切換機構(40)とを備え、
上記給気ファン(26)及び上記排気ファン(25)が作動し、上記冷媒回路(50)が上記第1冷凍サイクル動作と上記第2冷凍サイクル動作とを所定時間毎に交互に行い、上記冷媒回路(50)における冷凍サイクル動作の切り換えに連動して上記切換機構(40)が空気の流通経路を上記第1経路と上記第2経路とに交互に設定し、室内空間へ供給される室外空気を除湿し又は加湿する第1運転と、
上記給気ファン(26)及び上記排気ファン(25)が作動し、上記冷媒回路(50)の圧縮機(53)が停止し、上記切換機構(40)が所定時間毎に空気の流通経路を上記第1経路と上記第2経路とに交互に設定する第2運転とを行う
ことを特徴とする調湿装置。 - 請求項1において、
上記第1運転中に上記圧縮機(53)の運転容量を調湿負荷に応じて調節する制御器(90)を備え、
上記制御器(90)は、
上記第1運転中に上記圧縮機(53)の運転容量を最低容量に設定しても調湿能力が調湿負荷に対して過大であると判断すると、上記調湿装置(10)の運転を上記第1運転から上記第2運転へ切り換え、
上記第2運転中に調湿能力が調湿負荷に対して過小であると判断すると、上記調湿装置(10)の運転を上記第2運転から上記第1運転へ切り換える
ことを特徴とする調湿装置。 - 請求項1又は2において、
上記冷媒回路(50)では、上記第1吸着熱交換器(51)と上記第2吸着熱交換器(52)の間に開度可変の膨張弁(55)が設けられ、
上記第2運転中には、上記膨張弁(55)が全開状態に保持される
ことを特徴とする調湿装置。 - 請求項1において、
上記第2運転中に上記切換機構(40)が空気の流通経路を上記第1経路と上記第2経路とに交互に切り換える時間間隔は、上記第1運転中に上記切換機構(40)が空気の流通経路を上記第1経路と上記第2経路とに交互に切り換える時間間隔以下となっている
ことを特徴とする調湿装置。
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CN201280047124.4A CN103827590B (zh) | 2011-09-29 | 2012-09-20 | 调湿装置 |
AU2012313765A AU2012313765B2 (en) | 2011-09-29 | 2012-09-20 | Humidity Control Apparatus |
ES12836318.1T ES2665310T3 (es) | 2011-09-29 | 2012-09-20 | Aparato de control de humedad |
EP12836318.1A EP2767772B1 (en) | 2011-09-29 | 2012-09-20 | Humidity control device |
US14/347,946 US20140230475A1 (en) | 2011-09-29 | 2012-09-20 | Humidity control apparatus |
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JP2011214912A JP5229368B2 (ja) | 2011-09-29 | 2011-09-29 | 調湿装置 |
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US9696735B2 (en) * | 2013-04-26 | 2017-07-04 | Google Inc. | Context adaptive cool-to-dry feature for HVAC controller |
GB2545114C (en) * | 2014-09-26 | 2020-07-29 | Mitsubishi Electric Corp | Dehumidifier |
KR101667979B1 (ko) * | 2015-06-19 | 2016-10-21 | 한국생산기술연구원 | 제습 및 가습 기능을 갖는 공기조화기와 이를 이용한 제습냉방 및 가습난방 방법 |
CN109312939B (zh) * | 2016-06-27 | 2021-07-23 | 大金工业株式会社 | 调湿装置 |
KR101973648B1 (ko) | 2017-08-07 | 2019-04-29 | 엘지전자 주식회사 | 환기장치의 제어방법 |
US11035585B2 (en) | 2018-05-31 | 2021-06-15 | Carrier Corporation | Dehumidification control at part load |
JP2020200985A (ja) * | 2019-06-10 | 2020-12-17 | ダイキン工業株式会社 | 調湿ユニット、及び調湿システム |
CN114623576B (zh) * | 2020-12-10 | 2024-02-20 | 广东美的制冷设备有限公司 | 加湿装置的控制方法、装置、存储介质及空调器 |
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EP2767772A4 (en) | 2016-01-06 |
EP2767772B1 (en) | 2018-03-28 |
EP2767772A1 (en) | 2014-08-20 |
AU2012313765A1 (en) | 2014-05-01 |
AU2012313765B2 (en) | 2015-07-16 |
JP5229368B2 (ja) | 2013-07-03 |
CN103827590A (zh) | 2014-05-28 |
ES2665310T3 (es) | 2018-04-25 |
JP2013076476A (ja) | 2013-04-25 |
US20140230475A1 (en) | 2014-08-21 |
CN103827590B (zh) | 2016-09-21 |
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