CN108472578B - Dehumidifying device - Google Patents
Dehumidifying device Download PDFInfo
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- CN108472578B CN108472578B CN201580084853.0A CN201580084853A CN108472578B CN 108472578 B CN108472578 B CN 108472578B CN 201580084853 A CN201580084853 A CN 201580084853A CN 108472578 B CN108472578 B CN 108472578B
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
- B01D53/0454—Controlling adsorption
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
- B01D53/261—Drying gases or vapours by adsorption
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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
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating 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
- 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
- F24F11/89—Arrangement or mounting of control or safety devices
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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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Analytical Chemistry (AREA)
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- Air Conditioning Control Device (AREA)
Abstract
The dehumidifier performs a dehumidifying operation in which a first operation mode in which moisture held by the moisture adsorbing member is desorbed and a second operation mode in which moisture is adsorbed by the moisture adsorbing member from air passing through the air passage are alternately switched, the opening degree of the throttle device is set to a first opening degree larger than a normal control opening degree before the switching of the operation mode and the refrigerant circuit is operated for a preset first set time when the operation mode is switched, and the opening degree of the throttle device is set to a second opening degree smaller than the first opening degree and the refrigerant circuit is operated for a preset second set time after the first set time elapses.
Description
Technical Field
The present invention relates to a dehumidification device including a refrigerant circuit and a moisture adsorption member.
Background
A dehumidification device including a refrigerant circuit through which a refrigerant circulates and a moisture adsorption member that adsorbs and desorbs moisture has been known (see, for example, patent document 1). The conventional dehumidification device described in patent document 1 alternately switches between a first operation mode in which moisture adsorbed by the moisture adsorbing member is desorbed and a second operation mode in which the moisture adsorbing member adsorbs moisture contained in the air, thereby performing a dehumidification operation.
Prior art documents
Patent document
Patent document 1: japanese patent No. 5452565
Disclosure of Invention
Problems to be solved by the invention
In addition, in the dehumidifying apparatus, obtaining a high dehumidifying effect is an important issue, and further improvement is demanded.
The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a dehumidifier having an improved dehumidifying effect.
Means for solving the problems
The dehumidification device of the present invention comprises: a refrigerant circuit in which a compressor, a flow path switching device, a first heat exchanger, an expansion device, and a second heat exchanger are connected by refrigerant pipes; an air passage in which the first heat exchanger, the moisture adsorbing member that adsorbs and desorbs moisture, and the second heat exchanger are arranged in this order; an air blowing device that causes air in a space to be dehumidified to flow in the order of the first heat exchanger, the moisture adsorbing member, and the second heat exchanger; and a controller that performs a dehumidification operation in which a first operation mode in which the first heat exchanger functions as a condenser or a radiator and the second heat exchanger functions as an evaporator and desorbs moisture held by the moisture adsorbing member, and a second operation mode in which the moisture adsorbing member adsorbs moisture from air passing through the air passage, are alternately switched by switching of a flow path by the flow path switching device, wherein the controller is configured to, when the operation mode is switched from the first operation mode to the second operation mode or when the operation mode is switched from the second operation mode to the first operation mode, the opening degree of the expansion device is set to a first opening degree larger than a normal control opening degree before switching of the operation mode, and the refrigerant circuit is operated for a preset first set time.
Further, the dehumidification device of the present invention includes: a refrigerant circuit in which a compressor, a flow path switching device, a first heat exchanger, an expansion device, a second heat exchanger, and a third heat exchanger are connected by refrigerant pipes; an air passage in which the first heat exchanger, the moisture adsorbing member that adsorbs and desorbs moisture, and the second heat exchanger are arranged in this order; and an air blower that causes air in a space to be dehumidified to flow in the order of the first heat exchanger, the moisture adsorbing member, and the second heat exchanger, wherein the third heat exchanger is disposed between a discharge side of the compressor and the flow path switching device in the refrigerant circuit, and alternately switches between a first operation mode in which the third heat exchanger and the first heat exchanger function as a condenser or a radiator and a second operation mode in which the second heat exchanger functions as an evaporator and desorbs moisture held by the moisture adsorbing member by switching of the flow path switching device, and a second operation mode in which the first heat exchanger functions as an evaporator and the third heat exchanger and the second heat exchanger function as a condenser or a radiator, the moisture adsorbing member adsorbs moisture from air passing through the air passage.
ADVANTAGEOUS EFFECTS OF INVENTION
According to the present invention, since the operation of the refrigerant circuit can be quickly stabilized after the operation mode is switched, the moisture adsorbing member can efficiently adsorb and desorb moisture. Therefore, according to the present invention, a dehumidifying apparatus having an improved dehumidifying effect can be obtained.
Drawings
Fig. 1 is a diagram schematically illustrating an example of the configuration of a dehumidifying apparatus according to embodiment 1 of the present invention.
Fig. 2 is a diagram illustrating the control device shown in fig. 1.
Fig. 3 is a diagram showing an example of a relationship between the adsorption amount and the relative humidity of the moisture adsorbing member shown in fig. 1.
Fig. 4 is a diagram showing an example of a change in the state of air in the first operation mode of the dehumidifier shown in fig. 1.
Fig. 5 is a diagram showing an example of a change in the state of air in the second operation mode of the dehumidifying apparatus shown in fig. 1.
Fig. 6 is a diagram schematically illustrating an example of the configuration of the control device shown in fig. 1.
Fig. 7 is a diagram illustrating an example of the operation of the dehumidifying apparatus shown in fig. 1.
Detailed Description
Embodiments of the present invention will be described below with reference to the drawings. In the drawings, the same or corresponding portions are denoted by the same reference numerals, and the description thereof will be omitted or simplified as appropriate. The configuration described in each drawing can be appropriately modified in shape, size, arrangement, and the like within the scope of the present invention.
[ dehumidification device ]
Fig. 1 is a diagram schematically illustrating an example of the configuration of a dehumidifying apparatus according to embodiment 1 of the present invention, and fig. 2 is a diagram illustrating a control apparatus illustrated in fig. 1. The dehumidifying apparatus 100 shown in fig. 1 is installed in a room inside a room, for example, and dehumidifies the room. The dehumidifier 100 includes a refrigerant circuit a and a moisture adsorbing member 16.
< refrigerant Circuit >
The refrigerant circuit a is formed by connecting the compressor 13, the third heat exchanger 11c, the flow switching device 15, the first heat exchanger 11a, the expansion device 14, and the second heat exchanger 11b in this order by refrigerant pipes, and circulates a refrigerant.
(refrigerant)
The refrigerant to be applied to the refrigerant circuit a of this embodiment is, for example, an HFC-based refrigerant such as R410A, R407C, R404A, or R134 a. The refrigerant to be applied to the refrigerant circuit a in this embodiment may be an HCFC refrigerant such as R22, or may be a natural refrigerant such as hydrocarbon or helium. In addition, for example in the use of CO2When the refrigerant is in operation at a high pressure equal to or higher than the critical pressure, the condenser functions as a radiator.
(compressor)
The compressor 13 sucks and compresses a refrigerant, and discharges the refrigerant in a high-temperature and high-pressure state. The compressor 13 is, for example, an inverter compressor controlled by an inverter, and can change the capacity (the amount of refrigerant sent per unit time) by arbitrarily changing the operating frequency. In the example of fig. 1, one compressor 13 is described, but the dehumidifying apparatus 100 of the example of the present embodiment may include two or more compressors connected in parallel or in series, for example.
(first Heat exchanger, second Heat exchanger, third Heat exchanger)
The first heat exchanger 11a, the second heat exchanger 11b, and the third heat exchanger 11c exchange heat between the refrigerant and air. The first heat exchanger 11a, the second heat exchanger 11b, and the third heat exchanger 11c are fin-tube type heat exchangers including, for example, heat transfer tubes through which a refrigerant flows and a plurality of fins attached to the heat transfer tubes. The first heat exchanger 11a, the throttle device 14, and the second heat exchanger 11b are connected in series. The third heat exchanger 11c is disposed between the discharge side of the compressor 13 and the flow path switching device 15. That is, one of the third heat exchangers 11c is connected to the discharge side of the compressor 13, and the other is connected to the flow switching device 15.
(throttling device)
The expansion device 14 decompresses the refrigerant, and is, for example, an electronic expansion valve capable of adjusting the opening degree of the expansion by a stepping motor. The flow rate of the refrigerant flowing through the refrigerant circuit a is adjusted by adjusting the opening degree of the expansion device 14. The expansion device 14 may be a mechanical expansion valve using a diaphragm in the pressure receiving portion, or may be a capillary tube. The throttle device 14 is disposed between the first heat exchanger 11a and the second heat exchanger 11 b. That is, one side of the expansion device 14 is connected to the first heat exchanger 11a, and the other side is connected to the second heat exchanger 11 b.
(flow channel switching device)
As shown in fig. 1, the flow path switching device 15 switches the flow path to the solid line state or the broken line state, thereby switching the flow direction of the refrigerant flowing through the refrigerant circuit a, and is configured by, for example, a four-way valve or the like. The flow path switching device 15 may be formed by a combination of a plurality of two-way valves, for example. The flow path switching device 15 is connected to the side of the first heat exchanger 11a not connected to the expansion device 14, the side of the second heat exchanger 11b not connected to the expansion device 14, the side of the third heat exchanger 11c not connected to the discharge side of the compressor 13, and the suction side of the compressor 13. When the flow path switching device 15 is switched to the solid line state, the side of the third heat exchanger 11c not connected to the discharge side of the compressor 13 communicates with the side of the first heat exchanger 11a not connected to the expansion device 14, and the side of the second heat exchanger 11b not connected to the expansion device 14 communicates with the suction side of the compressor 13. When the flow path switching device 15 is switched to the state indicated by the broken line, the side of the third heat exchanger 11c not connected to the discharge side of the compressor 13 communicates with the side of the second heat exchanger 11b not connected to the expansion device 14, and the side of the first heat exchanger 11a not connected to the expansion device 14 communicates with the suction side of the compressor 13.
< moisture adsorbing Member >
The moisture adsorbing member 16 adsorbs or desorbs moisture contained in the air. The moisture adsorbing member 16 is formed of, for example, a porous material through which air can pass and an adsorbent covering the surface of the porous material. The adsorbent is attached to the surface of the porous material by, for example, coating, surface treatment, impregnation treatment, or the like. As the adsorbent, for example, a substance having a function of absorbing moisture from air having a relatively high humidity and releasing moisture to air having a relatively low humidity, such as zeolite, silica gel, or activated carbon, is used.
The moisture adsorbing member 16 is disposed in the air passage between the first heat exchanger 11a and the second heat exchanger 11 b. The air passage will be described later. The moisture adsorbing member 16 has, for example, a cross-sectional shape substantially the same as the cross-sectional shape of the air passage so as to be larger in cross-sectional area than the cross-sectional area of the air passage. The moisture adsorbing member 16 is, for example, a plate-like member having a square cross-sectional shape, but may be a plate-like member having a cross-sectional shape other than a square, such as a polygon or a circle. The air passing through the air passage passes through the moisture adsorbing member 16, for example, in the thickness direction of the moisture adsorbing member 16.
< air passage >
The dehumidifier 100 has an air passage between an intake port 102 and an outlet port 104, the intake port 102 taking in indoor air as a dehumidification target space, and the outlet port 104 blowing out dehumidified air obtained by dehumidifying the air taken in from the intake port 102. As shown by arrows in fig. 1, the air passage is formed as follows: the air sucked in from inlet 102 is passed through first heat exchanger 11a, moisture adsorbing member 16, second heat exchanger 11b, and third heat exchanger 11c in this order, and blown out from outlet 104.
The dehumidifier 100 includes temperature sensors 1a to 1h, temperature and humidity sensors 2a to 2e, an air velocity sensor 3, a control device 5, an input device 6, and an air blower 12.
(air supply device)
The blower 12 is disposed in the air passage of the dehumidifier 100, and generates the following air flows: air is sucked in from suction port 102, the sucked air is caused to pass through the air passage, and the air passing through the air passage is blown out from blow-out port 104. By operating the air blower 12, the air sucked in from the air inlet 102 passes through the first heat exchanger 11a, the moisture adsorbing member 16, the second heat exchanger 11b, and the third heat exchanger 11c in this order, and is blown out from the air outlet 104. The blower 12 includes a motor such as a DC fan motor and a fan such as a centrifugal fan or a sirocco fan attached to the motor, and is capable of adjusting the air volume. The blower 12 may be a device that includes an AC fan motor and has a constant air volume, for example. In the example of fig. 1, the air blower 12 is disposed downstream of the third heat exchanger 11c which is the most downstream of the air passage, but the position where the air blower 12 is disposed is not particularly limited. For example, the blower 12 may be disposed upstream of the first heat exchanger 11a that is the most upstream in the air passage.
(temperature sensor)
The temperature sensors 1a to 1h detect the temperature of the refrigerant flowing through the refrigerant circuit a. The temperature sensor 1a detects the temperature of the refrigerant on the discharge side of the compressor 13, the temperature sensor 1b detects the temperature of the refrigerant on the suction side of the compressor 13, the temperature sensors 1c and 1d detect the temperature of the refrigerant flowing into the first heat exchanger 11a or the temperature of the refrigerant flowing out of the first heat exchanger 11a, the temperature sensors 1e and 1f detect the temperature of the refrigerant flowing into the second heat exchanger 11b or the temperature of the refrigerant flowing out of the second heat exchanger 11b, and the temperature sensors 1g and 1h detect the temperature of the refrigerant flowing into the third heat exchanger 11c or the temperature of the refrigerant flowing out of the third heat exchanger 11 c.
(temperature and humidity sensor)
The temperature/humidity sensors 2a to 2e detect the temperature and humidity of the air passing through the air passage. The temperature/humidity sensor 2a detects the temperature/humidity of air flowing into the dehumidification device 100 from the room as the space to be dehumidified and before passing through the first heat exchanger 11a, the temperature/humidity sensor 2b detects the temperature/humidity of air passing through the first heat exchanger 11a and before passing through the moisture adsorbing member 16, the temperature/humidity sensor 2c detects the temperature/humidity of air passing through the moisture adsorbing member 16 and before passing through the second heat exchanger 11b, the temperature/humidity sensor 2d detects the temperature/humidity of air passing through the second heat exchanger 11b and before passing through the third heat exchanger 11c, and the temperature/humidity sensor 2e detects the temperature/humidity of air passing through the third heat exchanger 11 c.
(wind velocity sensor)
The wind speed sensor 3 detects the wind speed of the air passing through the air passage. In the example of fig. 1, the wind speed sensor 3 is disposed downstream of the third heat exchanger 11c which is the most downstream of the air passage, but the position where the wind speed sensor 3 is disposed is not particularly limited. For example, the wind speed sensor 3 may be disposed at a position where the wind speed of the air passing through the air passage can be detected, or may be disposed on the upstream side of the first heat exchanger 11a that is the most upstream side of the air passage.
(input device)
The input device 6 is a sensor that receives an instruction to the dehumidifier 100, for example, from a remote controller not shown. For example, the user can perform instructions on the start and stop of the dehumidification operation, instructions on the intensity of dehumidification, and the like using a remote controller, not shown. The instruction input to the input device 6 is input to the control device 5.
(control device)
The control device 5 performs control of the entire dehumidifying apparatus 100, and is configured to include hardware such as an analog circuit or a digital circuit, or software such as a program executed by an arithmetic device such as a microcomputer or a CPU. As shown in fig. 2, the control device 5 acquires, for example, the detection results of the temperature sensors 1a to 1h, the detection results of the temperature and humidity sensors 2a to 2e, the detection result of the wind speed sensor 3, the instruction input to the input device 6, and the information stored in the storage unit 7, and controls the air blowing device 12, the compressor 13, the throttle device 14, the flow path switching device 15, and the like, using the acquired detection results, instruction, information, and the like. The storage unit 7 is configured to include, for example, a nonvolatile memory, and stores information such as a program for controlling the dehumidifying apparatus 100 and parameters for controlling the dehumidifying apparatus 100.
Fig. 3 is a diagram showing an example of a relationship between the adsorption amount and the relative humidity of the moisture adsorbing member shown in fig. 1. In fig. 3, the horizontal axis represents the relative humidity of the air flowing into the moisture adsorbing member 16, and the vertical axis represents the equilibrium adsorption amount of the moisture adsorbing member 16, that is, the amount of moisture that can be adsorbed by the adsorbent of the moisture adsorbing member 16. As shown in fig. 3, the equilibrium adsorption amount of the moisture adsorption member 16 varies according to the relative humidity of the air flowing into the moisture adsorption member 16. That is, when the relative humidity of the air flowing into the moisture adsorbing member 16 is high, the moisture adsorbed by the moisture adsorbing member 16 is hardly released, and the amount of moisture that can be adsorbed by the moisture adsorbing member 16 increases. On the other hand, when the relative humidity of the air flowing into the moisture adsorbing member 16 is low, the moisture adsorbed by the moisture adsorbing member 16 is easily released, and the amount of moisture that can be adsorbed by the moisture adsorbing member 16 becomes small.
In the example of this embodiment, for example, the moisture adsorbing member 16 having a large difference between the equilibrium adsorption amount when the relative humidity of the air flowing into the moisture adsorbing member 16 is 80% or more and the equilibrium adsorption amount when the relative humidity of the air flowing into the moisture adsorbing member 16 is 40 to 60% is used. That is, the adsorbent used in the moisture adsorbing member 16 is a substance having a large difference between the equilibrium adsorption amount when the relative humidity of the air flowing into the moisture adsorbing member 16 is 80% or more and the equilibrium adsorption amount when the relative humidity of the air flowing into the moisture adsorbing member 16 is 40 to 60%. By using the moisture adsorbing member 16 having a large difference between the equilibrium adsorption amount when the humidity is high and the equilibrium adsorption amount when the humidity is low, the adsorption capacity and desorption capacity of the moisture adsorbing member 16 are improved. Fig. 3 shows a difference h between the equilibrium adsorption amount at a relative humidity of 80% and the equilibrium adsorption amount at a relative humidity of 50%.
[ operation of the dehumidifier ]
Next, an example of the operation of the dehumidifier 100 according to the example of the present embodiment will be described. As described below, the dehumidifier 100 according to the example of the present embodiment alternately executes the first operation mode and the second operation mode to execute the dehumidifying operation. This is because there is a limit to the amount of moisture that can be adsorbed by the moisture adsorbing member 16, and therefore, when the operation in which the moisture adsorbing member 16 adsorbs moisture contained in the air is continued for a long time, the moisture is no longer adsorbed by the moisture adsorbing member 16. Therefore, the dehumidifier 100 according to the example of the present embodiment performs the dehumidifying operation while alternately switching the operation mode in which the moisture held by the moisture adsorbing member 16 is desorbed and the operation mode in which the moisture adsorbing member 16 adsorbs moisture contained in the air.
< first operation mode >
First, the first operation mode is explained. In the first operation mode, moisture held by the moisture adsorbing member 16 is desorbed.
(operation of refrigerant Circuit in first operating mode)
In the first operation mode, the flow path switching device 15 is switched to the state shown by the solid line in fig. 1. That is, the flow path switching device 15 connects the third heat exchanger 11c to the first heat exchanger 11a, and connects the second heat exchanger 11b to the intake side of the compressor 13.
The high-temperature and high-pressure refrigerant sucked and compressed by the compressor 13 flows into the third heat exchanger 11 c. The refrigerant flowing into the third heat exchanger 11c exchanges heat with air to dissipate heat to the air, and is partially condensed and liquefied. A part of the refrigerant condensed and liquefied in the third heat exchanger 11c passes through the flow path switching device 15 and flows into the first heat exchanger 11 a. The refrigerant flowing into the first heat exchanger 11a is condensed and liquefied by heat exchange with air to dissipate heat to the air, and flows into the expansion device 14. The refrigerant flowing into the expansion device 14 is decompressed by the expansion device 14 and flows into the second heat exchanger 11 b. The refrigerant flowing into the second heat exchanger 11b absorbs heat from the air by exchanging heat with the air, and evaporates. The refrigerant evaporated in the second heat exchanger 11b passes through the flow switching device 15, is sucked into the compressor 13, and is compressed again.
(Change of State of air in first operation mode)
Fig. 4 is a diagram showing an example of a change in the state of air in the first operation mode of the dehumidifier shown in fig. 1. In fig. 4, the horizontal axis represents the dry bulb temperature of air, the vertical axis represents the absolute humidity of air, and the graph represents the relative humidity 100% which is saturated air. In fig. 4, point 1-1 indicates a state of air sucked from the suction port 102 into the dehumidifying apparatus 100, point 1-2 indicates a state of air after passing through the first heat exchanger 11a, point 1-3 indicates a state of air after passing through the moisture adsorbing member 16, point 1-4 indicates a state of air after passing through the second heat exchanger 11b, and point 1-5 indicates a state of air after passing through the third heat exchanger 11 c.
The air (point 1-1 in fig. 4) sucked into the space to be dehumidified inside the dehumidifier 100 from the suction port 102 in fig. 1 is heated by heat exchange with the refrigerant in the first heat exchanger 11a functioning as a condenser to become high-temperature and low-relative-humidity air (point 1-2).
The air having a high temperature and a low relative humidity obtained by the first heat exchanger 11a (point 1-2) passes through the moisture adsorbing member 16, and becomes humidified air (point 1-3). That is, as shown in point 1-2, the air passing through the moisture adsorbing member 16 is, for example, air with a low relative humidity having a relative humidity of 40 to 60% RH, and therefore the moisture adsorbing member 16 desorbs (releases) the moisture contained in the moisture adsorbing member 16. In addition, the air is cooled to the state of point 1-3 by taking the desorption heat generated along with the desorption of moisture from the air flowing into the moisture adsorbing member 16.
The air obtained by the moisture adsorbing member 16 (point 1-3) is cooled by heat exchange with the refrigerant in the second heat exchanger 11b functioning as an evaporator (point 1-4). In the first operation mode, the refrigerant circuit a is operated such that the temperature of the refrigerant flowing through the second heat exchanger 11b is lower than the dew point temperature of the air (point 1-3) obtained by the moisture adsorbing member 16, and the air (point 1-3) obtained by the moisture adsorbing member 16 passes through the second heat exchanger 11b, thereby being cooled and dehumidified to become air (point 1-4) having a low temperature and a high relative humidity. The air (point 1-4) obtained by the second heat exchanger 11b is heated (point 1-5) by heat exchange with the refrigerant by the third heat exchanger 11c functioning as a condenser, and is blown out from the blow-out port 104 into the space to be dehumidified.
< second operation mode >
Next, the second operation mode will be described. In the second operation mode, the moisture adsorbing member 16 adsorbs moisture contained in the air.
(operation of the refrigerant Circuit in the second operation mode)
In the second operation mode, the flow path switching device 15 is switched to a state shown by a broken line in fig. 1. That is, the flow path switching device 15 connects the third heat exchanger 11c and the second heat exchanger 11b, and connects the first heat exchanger 11a and the suction side of the compressor 13.
The high-temperature and high-pressure refrigerant sucked and compressed by the compressor 13 flows into the third heat exchanger 11 c. The refrigerant flowing into the third heat exchanger 11c exchanges heat with air to dissipate heat to the air, and is partially condensed and liquefied. A part of the refrigerant condensed and liquefied in the third heat exchanger 11c passes through the flow switching device 15 and flows into the second heat exchanger 11 b. The refrigerant flowing into the second heat exchanger 11b exchanges heat with air to dissipate heat to the air, condenses, liquefies, and flows into the expansion device 14. The refrigerant flowing into the expansion device 14 is decompressed by the expansion device 14 and flows into the first heat exchanger 11 a. The refrigerant flowing into the first heat exchanger 11a exchanges heat with air, absorbs heat from the air, and evaporates. The refrigerant evaporated in the first heat exchanger 11a passes through the flow switching device 15, is sucked into the compressor 13, and is compressed again.
(Change of State of air in second operation mode)
Fig. 5 is a diagram showing an example of a change in the state of air in the second operation mode of the dehumidifying apparatus shown in fig. 1. In fig. 5, the horizontal axis represents the dry bulb temperature of air, the vertical axis represents the absolute humidity of air, and the graph represents the relative humidity 100% which is saturated air. In fig. 5, point 2-1 indicates a state of air sucked from the suction port 102 into the dehumidifying apparatus 100, point 2-2 indicates a state of air after passing through the first heat exchanger 11a, point 2-3 indicates a state of air after passing through the moisture adsorbing member 16, point 2-4 indicates a state of air after passing through the second heat exchanger 11b, and point 2-5 indicates a state of air after passing through the third heat exchanger 11 c.
The air (point 2-1 in fig. 5) sucked into the space to be dehumidified inside the dehumidifier 100 from the suction port 102 in fig. 1 is cooled by heat exchange with the refrigerant in the first heat exchanger 11a functioning as an evaporator (point 2-2). For example, in the second operation mode, the refrigerant circuit a is operated such that the temperature of the refrigerant flowing through the first heat exchanger 11a is lower than the dew point temperature of the air in the space to be dehumidified (point 2-1), and the air in the space to be dehumidified (point 2-1) passes through the first heat exchanger 11a, thereby being cooled and dehumidified to become air having a low temperature and a high relative humidity (point 2-2).
The air having a low temperature and a high relative humidity obtained by the first heat exchanger 11a (point 2-2) passes through the moisture adsorbing member 16 and becomes air to be further dehumidified (point 2-3). That is, as shown in point 2-2, the air passing through the moisture adsorbing member 16 is, for example, air having a high relative humidity of 70 to 90% RH, and therefore the moisture adsorbing member 16 adsorbs moisture contained in the air. The air passing through the moisture adsorbing member 16 is heated by the adsorption heat generated by the adsorption of moisture by the moisture adsorbing member 16, and is in a state of point 2-3.
The air obtained by the moisture adsorbing member 16 is heated by the heat exchange with the refrigerant in the second heat exchanger 11b functioning as a condenser (point 2-4). The air (point 2-4) obtained by the second heat exchanger 11b is heated (point 2-5) by heat exchange with the refrigerant by the third heat exchanger 11c functioning as a condenser, and is blown out from the blow-out port 104 into the space to be dehumidified.
Further, as described above, the direction of the refrigerant flowing through the refrigerant circuit a is switched by switching the flow switching device 15, and the operation mode switching between the first operation mode and the second operation mode is performed. Therefore, when the operation mode is switched, the refrigerant remains in the heat exchanger functioning as a condenser before the operation mode is switched and functioning as an evaporator after the operation mode is switched, and therefore, a long time is required until the distribution of the refrigerant in the refrigerant circuit a is optimized. As a result, after the operation mode is switched, it takes a long time until the operation of the refrigerant circuit a in the switched operation mode is stabilized. Therefore, the dehumidifier 100 of the example of the present embodiment is configured as follows.
[ Structure of control device ]
Fig. 6 is a diagram schematically illustrating an example of the configuration of the control device shown in fig. 1. As shown in fig. 6, the control device 5 includes an opening degree determination unit 51, an operation mode switching determination unit 52, a throttle device control unit 53, and a flow path switching device control unit 54. The opening degree determining unit 51 determines the opening degree of the expansion device 14 using the detection results of the temperature sensor 1c, the temperature sensor 1d, the temperature sensor 1e, and the temperature sensor 1f, the parameters stored in the storage unit 7, the determination result of the operation mode switching determining unit 52, and the like. The throttle device control unit 53 controls the throttle device 14 using the information on the opening degree determined by the opening degree determination unit 51.
The operation mode switching determination unit 52 determines whether to switch the operation mode from the first operation mode to the second operation mode or to switch the operation mode from the second operation mode to the first operation mode. For example, the determination of switching the operation mode between the first operation mode and the second operation mode is made using the temperature difference between the temperature of the air before passing through the moisture adsorbing member 16 and the temperature of the air after passing through the moisture adsorbing member 16. The determination of switching between the first operation mode and the second operation mode is not limited to the above example, and may be performed using, for example, time, a temperature difference between before and after the moisture adsorbing member 16, an absolute humidity difference between before and after the moisture adsorbing member 16, and a change amount of relative humidity between before and after the moisture adsorbing member 16. Further, for example, the switching determination between the first operation mode and the second operation mode may be performed using a variation in pressure loss in the air passage. This is because the moisture adsorbing member 16 swells by adsorbing moisture, and therefore the pressure loss of the air passage fluctuates according to the amount of moisture adsorbed by the moisture adsorbing member 16. The flow path switching device control unit 54 switches the flow path of the flow path switching device 15 using the determination result of the operation mode switching determination unit 52.
[ detailed operation of the dehumidification apparatus ]
Fig. 7 is a diagram illustrating an example of the operation of the dehumidifying apparatus shown in fig. 1. As shown in fig. 7, for example, when the dehumidifying apparatus 100 starts the dehumidifying operation in step S02, the superheat degree of the refrigerant circuit a is controlled in steps S04 to S08. That is, in step S04, the opening degree determination unit 51 shown in fig. 6 acquires the detection result of the temperature sensor. In step S06, the opening degree determining unit 51 determines the normal control opening degree Op of the expansion device 14 so that the degree of superheat is appropriate, using the detection result of the temperature sensor. Then, in step S06, the throttle device control part 53 sets the opening degree of the throttle device 14 to the normal control opening degree Op determined by the opening degree determining part 51.
For example, in the first operation mode, the superheat degree (SH) is calculated using the low-pressure saturation temperature of the refrigerant circuit a, which is the temperature detected by the temperature sensor 1f, and the temperature of the outlet of the second heat exchanger 11b, which is the temperature detected by the temperature sensor 1 e. Specifically, in the first operation mode, the degree of superheat is calculated by subtracting the low-pressure saturation temperature of the refrigerant circuit a, which is the temperature detected by the temperature sensor 1f, from the temperature detected by the temperature sensor 1e, which is the temperature at the outlet of the second heat exchanger 11 b. Then, for example, superheat degree control is performed to determine where the calculated superheat degree is located in an appropriate region centered on an appropriate value of the superheat degree, and control is performed to increase, decrease, or maintain the opening degree of the expansion device 14, thereby bringing the superheat degree of the refrigerant circuit a into an appropriate range.
For example, in the second operation mode, the superheat degree (SH) is calculated using the temperature detected by the temperature sensor 1d, that is, the low-pressure saturation temperature of the refrigerant circuit a, and the temperature detected by the temperature sensor 1c, that is, the temperature at the outlet of the first heat exchanger 11 a. Specifically, in the second operation mode, the degree of superheat is calculated by subtracting the low-pressure saturation temperature of the refrigerant circuit a, which is the temperature detected by the temperature sensor 1d, from the temperature detected by the temperature sensor 1c, which is the temperature at the outlet of the first heat exchanger 11 a. Then, for example, superheat degree control is performed to determine where the calculated superheat degree is located in an appropriate region centered on an appropriate value of the superheat degree, and control is performed to increase, decrease, or maintain the opening degree of the expansion device 14, thereby bringing the superheat degree of the refrigerant circuit a into an appropriate range.
The range in which the degree of superheat is appropriate differs depending on, for example, the configuration of the refrigerant circuit a, and is not a fixed value.
In step S10 of fig. 7, the operation mode switching determination unit 52 of fig. 6 determines whether or not to switch the operation mode. If it is determined that the operation mode is not to be switched, the process returns to step S04 to continue the superheat degree control of the refrigerant circuit a. When it is determined at step S10 that the operation mode is to be switched, the flow path switching device control unit 54 proceeds to step S12, and switches the flow path switching device 15 to perform switching of the operation mode from the first operation mode to the second operation mode or switching of the operation mode from the second operation mode to the first operation mode.
In step S14, the opening degree determiner 51 determines a first opening degree Op1 using a normal control opening degree Op, which is the opening degree of the throttle device 14 before the operation mode is switched, and the first opening degree Op1, which is an opening degree greater than the normal control opening degree Op. Information on the control amount for increasing the opening degree of the throttle device 14 from the normal control opening degree Op to the first opening degree Op1 is set in advance and stored in the storage part 7. For example, the first opening degree Op1 is twice or more the normal control opening degree Op, and is extremely increased from the normal control opening degree Op. The control amount for increasing the opening degree of the expansion device 14 from the normal control opening degree Op to the first opening degree Op1 differs depending on the configuration of the refrigerant circuit a and the like, and is not a fixed value. In step S16, the throttle device control unit 53 sets the opening degree of the throttle device 14 to the first opening degree Op1 determined by the opening degree determination unit 51 in step S14. Then, in step S18, the elapse of the first set time T1 is waited for. The first setting time T1 is set in advance and stored in the storage unit 7. For example, the first set time T1 is 60 seconds. The first set time T1 differs depending on the configuration of the refrigerant circuit a and the like, and is not a fixed value. As described above, when the operation mode is switched, the refrigerant distribution in the refrigerant circuit a is quickly optimized by setting the opening degree of the expansion device 14 to the first opening degree Op1 larger than the normal control opening degree Op before the operation mode is switched and operating the refrigerant circuit a for the first set time T1. This is because the refrigerant that has accumulated in the heat exchanger functioning as a condenser before the operation mode is switched and functioning as an evaporator after the operation mode is switched circulates rapidly in the refrigerant circuit a by increasing the opening degree of the expansion device 14 and operating the refrigerant circuit a.
When the first setting time T1 elapses in step S18, the opening degree decision part 51 decides a second opening degree Op2 using the first opening degree Op1 in step S20, the second opening degree Op2 being a smaller opening degree than the first opening degree Op 1. Information on the control amount for decreasing the opening degree of the throttle device 14 from the first opening degree Op1 to the second opening degree Op2 is set in advance and stored in the storage portion 7. For example, the second opening degree Op2 is less than one third of the first opening degree Op1, and is smaller than the normal control opening degree Op, which is the opening degree of the throttle device 14 before the operation mode is switched. That is, the second opening degree Op2 becomes extremely small from the first opening degree Op 1. Further, the control amount to decrease the opening degree of the throttle device 14 from the first opening degree Op1 to the second opening degree Op2 is different depending on the configuration of the refrigerant circuit a and the like, and is not a fixed value. In step S22, the throttle device control unit 53 sets the opening degree of the throttle device 14 to the second opening degree Op2 determined by the opening degree determination unit 51 in step S20. Then, in step S24, the passage of the second set time T2 is waited for. The second setting time T2 is set in advance and stored in the storage unit 7. For example, the second set time T2 is 60 seconds. The second set time T2 differs depending on the configuration of the refrigerant circuit a and the like, and is not a fixed value. As described above, by setting the opening degree of the expansion device 14 to the second opening degree Op2 smaller than the first opening degree Op1 after the first setting time T1 elapses and operating the refrigerant circuit a for the second setting time T2, the operation of the refrigerant circuit a can be rapidly stabilized.
When the second setting time T2 elapses in step S24, the process returns to step S04, and the superheat control of the refrigerant circuit a is started again.
As described above, the dehumidifying apparatus 100 of the present embodiment includes: a refrigerant circuit a in which the compressor 13, the flow switching device 15, the first heat exchanger 11a, the expansion device 14, and the second heat exchanger 11b are connected by refrigerant pipes; an air passage in which a first heat exchanger 11a, a moisture adsorbing member 16 that adsorbs and desorbs moisture, and a second heat exchanger 11b are arranged in this order; an air blower 12 for causing air in the space to be dehumidified to flow through the first heat exchanger 11a, the moisture adsorbing member 16, and the second heat exchanger 11b in this order; and a controller 5 that performs a dehumidification operation in which the flow path switching device 15 switches between a first operation mode in which the first heat exchanger 11a functions as a condenser or a radiator and the second heat exchanger 11b functions as an evaporator to desorb moisture held by the moisture adsorbing member 16, and a second operation mode in which the first heat exchanger 11a functions as an evaporator and the second heat exchanger 11b functions as a condenser or a radiator and the moisture adsorbing member 16 adsorbs moisture from air passing through the air passage, the controller 5 setting the opening degree of the throttle device 14 to a first opening degree Op larger than a normal control opening degree Op of the throttle device 14 before the switching operation mode when the operation mode is switched from the first operation mode to the second operation mode or when the operation mode is switched from the second operation mode to the first operation mode The opening degree Op1 is set to a first preset time T1, and after the first set time T1 has elapsed, the opening degree of the expansion device 14 is set to a second opening degree Op2 smaller than the first opening degree Op1, and the refrigerant circuit a is operated for a second preset time T2.
In the dehumidifier 100 of the example of the embodiment, the opening degree of the expansion device 14 is set to the first opening degree Op1 larger than the normal control opening degree Op before the operation mode is switched and the refrigerant circuit a is operated for the first set time T1 when the operation mode is switched, so that the distribution of the refrigerant is promptly optimized. This is because the refrigerant retained in the heat exchanger functioning as a condenser before the operation mode is switched and functioning as an evaporator after the operation mode is switched can be quickly circulated in the refrigerant circuit a by operating the refrigerant circuit a with the opening degree of the expansion device 14 increased.
In the dehumidifier 100 of the example of the present embodiment, after the first setting time T1 has elapsed, the opening degree of the expansion device 14 is set to the second opening degree Op2 smaller than the first opening degree Op1, and the refrigerant circuit a is operated for the second setting time T2 set in advance, so that the operation of the refrigerant circuit a can be rapidly stabilized. For example, when the normal control (the superheat degree control described above) of the expansion device 14 is performed from the state in which the opening degree of the expansion device 14 is large at the first opening degree Op1, a long time is required until the opening degree of the expansion device 14 becomes the normal control opening degree Op and the operation of the refrigerant circuit a is stabilized. In the dehumidifier 100 of the example of the embodiment, when the operation mode is switched, the opening degree of the expansion device 14 is set to the first opening degree Op1 larger than the normal control opening degree Op and the refrigerant circuit a is operated for the first set time T1, and after the first set time T1 elapses, the opening degree of the expansion device 14 is set to the second opening degree Op2 smaller than the first opening degree Op1 and the refrigerant circuit a is operated for the second set time T2 set in advance, whereby the operation of the refrigerant circuit a can be rapidly stabilized.
As described above, the dehumidifier 100 of the example of the present embodiment can quickly stabilize the operation of the refrigerant circuit a after switching the operation mode, and therefore the moisture adsorbing member 16 can efficiently adsorb and desorb moisture. Therefore, the dehumidification effect of the dehumidification device 100 of the example of the embodiment is improved.
For example, the second opening degree Op2 is configured to be smaller than the normal control opening degree Op before the operation mode is switched, and the operation of the refrigerant circuit a can be stabilized more quickly.
For example, the dehumidifier 100 further includes a third heat exchanger 11c which is disposed between the discharge side of the compressor 13 and the flow path switching device 15, and functions as a condenser or a radiator in each of the first operation mode and the second operation mode. By having the third heat exchanger 11c that functions as a condenser or a radiator in each of the first operation mode and the second operation mode, the amount of refrigerant that remains in the heat exchanger that functions as a condenser before the operation mode is switched and functions as an evaporator after the operation mode is switched can be reduced, and therefore the distribution of refrigerant after the operation mode is switched can be quickly optimized.
The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the present invention. That is, the structure of the above embodiment can be suitably improved, and at least a part thereof can be replaced with another structure. Further, the components whose arrangement is not particularly limited are not limited to the arrangement disclosed in the embodiment, and may be arranged at positions where the functions can be realized.
For example, the third heat exchanger 11c shown in fig. 1 may be omitted, and a heating device such as an electric heater for heating air may be disposed downstream of the second heat exchanger 11b in the air passage. The third heat exchanger 11c shown in fig. 1 may be simply omitted.
For example, in the above description, the dehumidification device 100 including the temperature sensors 1a to 1h, the temperature/humidity sensors 2a to 2e, and the wind speed sensor 3 has been described, but the sensors included in the dehumidification device 100 are not limited to the above sensors, and the types of sensors are appropriately changed depending on the specification of the dehumidification device 100. For example, the dehumidifier 100 may omit one or more sensors among the temperature sensors 1a to 1h, the temperature/humidity sensors 2a to 2e, and the wind speed sensor 3, and may further include a sensor for detecting temperature, humidity, wind speed, pressure, or the like.
Description of reference numerals
1a to 1h temperature sensors, 2a to 2e temperature and humidity sensors, 3 air velocity sensors, 5 control means, 6 input means, 7 storage means, 11a first heat exchanger, 11b second heat exchanger, 11c third heat exchanger, 12 air blowing means, 13 compressor, 14 throttle means, 15 flow path switching means, 16 moisture adsorbing member, 51 opening degree determining means, 52 operation mode switching determining means, 53 throttle means control means, 54 flow path switching means control means, 100 dehumidifying means, 102 suction port, 104 discharge port, a refrigerant circuit, Op normal control opening degree, Op1 first opening degree, Op2 second opening degree, T1 first setting time, T2 second setting time.
Claims (5)
1. A dehumidification device, comprising:
a refrigerant circuit in which a compressor, a flow path switching device, a first heat exchanger, an expansion device, and a second heat exchanger are connected by refrigerant pipes;
an air passage in which the first heat exchanger, the moisture adsorbing member that adsorbs and desorbs moisture, and the second heat exchanger are arranged in this order;
an air blowing device that causes air in a space to be dehumidified to flow in the order of the first heat exchanger, the moisture adsorbing member, and the second heat exchanger; and
a controller that performs a dehumidification operation in which a first operation mode in which the first heat exchanger functions as a condenser or a radiator and the second heat exchanger functions as an evaporator and desorbs moisture held by the moisture adsorbing member and a second operation mode in which the moisture adsorbing member adsorbs moisture from air passing through the air passage are alternately switched by switching a flow path by the flow path switching device,
the control device sets the opening degree of the expansion device to a first opening degree larger than a normal control opening degree before switching the operation mode and operates the refrigerant circuit for a first set time set in advance, and sets the opening degree of the expansion device to a second opening degree smaller than the first opening degree and operates the refrigerant circuit for a second set time set in advance after the first set time elapses, when the operation mode is switched from the first operation mode to the second operation mode or when the operation mode is switched from the second operation mode to the first operation mode.
2. A dehumidification device, comprising:
a refrigerant circuit in which a compressor, a flow path switching device, a first heat exchanger, an expansion device, and a second heat exchanger are connected by refrigerant pipes;
an air passage in which the first heat exchanger, the moisture adsorbing member that adsorbs and desorbs moisture, and the second heat exchanger are arranged in this order;
an air blowing device that causes air in a space to be dehumidified to flow in the order of the first heat exchanger, the moisture adsorbing member, and the second heat exchanger; and
a controller that performs a dehumidification operation in which a first operation mode in which the first heat exchanger functions as a condenser or a radiator and the second heat exchanger functions as an evaporator and desorbs moisture held by the moisture adsorbing member and a second operation mode in which the moisture adsorbing member adsorbs moisture from air passing through the air passage are alternately switched by switching a flow path by the flow path switching device,
the control device sets the opening degree of the expansion device to a first opening degree larger than a normal control opening degree before switching the operation mode and operates the refrigerant circuit for a preset first set time, and sets the opening degree of the expansion device to a second opening degree smaller than the first opening degree and operates the refrigerant circuit for a preset second set time after the first set time elapses, when the operation mode is switched from the first operation mode to the second operation mode or when the operation mode is switched from the second operation mode to the first operation mode,
the dehumidifier further includes a third heat exchanger disposed between the discharge side of the compressor and the flow path switching device in the refrigerant circuit, and functioning as a condenser or a radiator in each of the first operation mode and the second operation mode.
3. Dehumidification apparatus according to claim 1 or claim 2,
the first opening degree is two times or more the normal control opening degree, and the second opening degree is one third or less the first opening degree.
4. Dehumidification apparatus according to claim 2 wherein,
the third heat exchanger is disposed downstream of the second heat exchanger in the air passage.
5. A dehumidification device, comprising:
a refrigerant circuit in which a compressor, a flow path switching device, a first heat exchanger, an expansion device, a second heat exchanger, and a third heat exchanger are connected by refrigerant pipes;
an air passage in which the first heat exchanger, the moisture adsorbing member that adsorbs and desorbs moisture, and the second heat exchanger are arranged in this order;
an air blowing device that causes air in a space to be dehumidified to flow in the order of the first heat exchanger, the moisture adsorbing member, and the second heat exchanger; and
a control device for controlling the operation of the motor,
the third heat exchanger is disposed in the refrigerant circuit between a discharge side of the compressor and the flow path switching device,
the controller performs a dehumidification operation in which a first operation mode in which the third heat exchanger and the first heat exchanger function as a condenser or a radiator and the second heat exchanger functions as an evaporator and desorbs moisture held by the moisture adsorbing member, and a second operation mode in which the third heat exchanger and the second heat exchanger function as a condenser or a radiator and the moisture adsorbing member adsorbs moisture from air passing through the air passage are alternately switched by switching of the flow path by the flow path switching device,
the control device sets the opening degree of the expansion device to a first opening degree larger than a normal control opening degree before switching of the operation mode and operates the refrigerant circuit for a preset first set time, and sets the opening degree of the expansion device to a second opening degree smaller than the first opening degree and operates the refrigerant circuit for a preset second set time after the first set time elapses, when the operation mode is switched from the first operation mode to the second operation mode or when the operation mode is switched from the second operation mode to the first operation mode.
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| PCT/JP2015/086526 WO2017115421A1 (en) | 2015-12-28 | 2015-12-28 | Dehumidifying device |
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| CN110186150B (en) * | 2019-05-31 | 2021-06-29 | 广东美的制冷设备有限公司 | Operation control method, control device, air conditioner, and computer-readable storage medium |
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| CN1587834A (en) * | 2004-09-07 | 2005-03-02 | 熊晓强 | Integrated dehumidifier |
| CN1795349A (en) * | 2003-05-27 | 2006-06-28 | 大金工业株式会社 | Humidity controller |
| JP2009273963A (en) * | 2008-05-12 | 2009-11-26 | Daikin Ind Ltd | Dehumidifying apparatus |
| CN104955548A (en) * | 2013-01-29 | 2015-09-30 | 三菱电机株式会社 | Dehumidifier |
| CN105142757A (en) * | 2013-04-24 | 2015-12-09 | 三菱电机株式会社 | Dehumidifying device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP3807409B2 (en) * | 2004-04-27 | 2006-08-09 | ダイキン工業株式会社 | Humidity control device |
| JP5452565B2 (en) * | 2011-10-27 | 2014-03-26 | 三菱電機株式会社 | Dehumidifier |
| JP5627721B2 (en) * | 2013-01-23 | 2014-11-19 | 三菱電機株式会社 | Dehumidifier |
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- 2015-12-28 GB GB1806846.0A patent/GB2561308B/en active Active
- 2015-12-28 WO PCT/JP2015/086526 patent/WO2017115421A1/en active Application Filing
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1795349A (en) * | 2003-05-27 | 2006-06-28 | 大金工业株式会社 | Humidity controller |
| CN1587834A (en) * | 2004-09-07 | 2005-03-02 | 熊晓强 | Integrated dehumidifier |
| JP2009273963A (en) * | 2008-05-12 | 2009-11-26 | Daikin Ind Ltd | Dehumidifying apparatus |
| CN104955548A (en) * | 2013-01-29 | 2015-09-30 | 三菱电机株式会社 | Dehumidifier |
| CN105142757A (en) * | 2013-04-24 | 2015-12-09 | 三菱电机株式会社 | Dehumidifying device |
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| CN108472578A (en) | 2018-08-31 |
| GB201806846D0 (en) | 2018-06-13 |
| JP6664413B2 (en) | 2020-03-13 |
| GB2561308A (en) | 2018-10-10 |
| JPWO2017115421A1 (en) | 2018-08-09 |
| WO2017115421A1 (en) | 2017-07-06 |
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