JPWO2017115421A1 - Dehumidifier - Google Patents

Abstract

The dehumidifying device performs a dehumidifying operation for alternately switching between a first operation mode for desorbing moisture held in the moisture adsorbing means and a second operation mode for adsorbing moisture from the air passing through the air passage by the moisture adsorbing means. When the operation mode is switched, the opening of the expansion device is set to a first opening that is larger than the normal control opening before switching the operation mode, and a preset first set time After the refrigerant circuit is operated and the first set time elapses, the opening of the expansion device is set to a second opening smaller than the first opening, and the refrigerant circuit is set for a second preset time. Is to operate.

Description

  The present invention relates to a dehumidifying device provided with a refrigerant circuit and a moisture adsorbing means.

  2. Description of the Related Art Conventionally, a dehumidifying device including a refrigerant circuit in which a refrigerant circulates and a moisture adsorption unit that adsorbs and desorbs moisture is known (for example, see Patent Document 1). The conventional dehumidifying device described in Patent Document 1 includes a first operation mode in which moisture adsorbed by the moisture adsorbing means is desorbed and a second operation mode in which the moisture adsorbing means adsorbs moisture contained in the air. And dehumidifying operation by alternately switching between and.

Japanese Patent No. 5454565

  By the way, in the dehumidifying apparatus, obtaining a high dehumidifying effect is an important issue, and further improvement is required.

  The present invention has been made against the background of the above problems, and an object thereof is to obtain a dehumidifying device having an improved dehumidifying effect.

  A dehumidifying device according to the present invention includes a refrigerant circuit in which a compressor, a flow path switching device, a first heat exchanger, a throttling device, and a second heat exchanger are connected by a refrigerant pipe, the first heat exchanger, moisture The moisture adsorbing means for adsorbing and desorbing the air, and the air passage in which the second heat exchanger is sequentially arranged, and the air in the space to be dehumidified are converted into the first heat exchanger, the moisture adsorbing means, the second heat exchanger The first heat exchanger functions as a condenser or a radiator, and the second heat exchanger functions as an evaporator, and desorbs moisture held in the moisture adsorbing means. And the first heat exchanger functions as an evaporator, the second heat exchanger functions as a condenser or a radiator, and the moisture adsorbing means is from the air passing through the air path. The second operation mode for adsorbing moisture is defined as the channel switching of the channel switching device. And a control device that performs a dehumidifying operation that is alternately switched by the control device, wherein the control device switches the operation mode from the first operation mode to the second operation mode, or from the second operation mode to the first operation mode. When the operation mode is switched to the operation mode, the opening of the expansion device is set to a first opening that is larger than the normal control opening before the operation mode is switched, and a preset first set time, After the refrigerant circuit is operated and the first set time elapses, the opening of the expansion device is set to a second opening that is smaller than the first opening, and a preset second set time. The refrigerant circuit is operated.

  Moreover, the dehumidifying device according to the present invention includes a refrigerant circuit in which a compressor, a flow path switching device, a first heat exchanger, a throttling device, a second heat exchanger, and a third heat exchanger are connected by a refrigerant pipe, The first heat exchanger, the moisture adsorbing means for adsorbing and desorbing moisture, and the second heat exchanger are sequentially arranged, and the air in the dehumidification target space is replaced with the first heat exchanger, the moisture adsorption And a blower that flows in the order of the second heat exchanger, and the third heat exchanger is disposed in the refrigerant circuit between the discharge side of the compressor and the flow path switching device. 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 the moisture retained in the moisture adsorption means A first operation mode for desorbing, and the first heat exchanger functioning as an evaporator, The heat exchanger and the second heat exchanger function as a condenser or a radiator, and the second operation mode in which the moisture adsorbing means adsorbs moisture from the air passing through the air path is defined by the flow path switching device. It is switched alternately by channel switching.

  According to the present invention, since the operation of the refrigerant circuit can be quickly stabilized after the operation mode is switched, the moisture adsorption means can efficiently absorb and desorb moisture. Therefore, according to this invention, the dehumidification apparatus with which the dehumidification effect was improved is obtained.

It is the figure which described typically an example of the structure of the dehumidification apparatus which concerns on Embodiment 1 of this invention. It is a figure explaining the control apparatus of FIG. It is a figure which shows an example of the relationship between the adsorption amount of the water | moisture-content adsorption | suction means of FIG. 1, and relative humidity. It is a figure which shows an example of the state change of the air in the 1st operation mode of the dehumidification apparatus of FIG. It is a figure which shows an example of the state change of the air in the 2nd operation mode of the dehumidification apparatus of FIG. It is the figure which described typically an example of the structure of the control apparatus described in FIG. It is a figure explaining an example of operation | movement of the dehumidification apparatus described in FIG.

  Embodiments of the present invention will be described below with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals, and the description thereof is omitted or simplified as appropriate. Moreover, the shape, size, arrangement, and the like of the configurations described in the drawings can be changed as appropriate within the scope of the present invention.

Embodiment 1 FIG.
[Dehumidifier]
FIG. 1 is a diagram schematically illustrating an example of a configuration of a dehumidifying device according to Embodiment 1 of the present invention, and FIG. 2 is a diagram illustrating the control device illustrated in FIG. A dehumidifying apparatus 100 illustrated in FIG. 1 is installed in a room inside a room, for example, and dehumidifies the room. The dehumidifying device 100 includes a refrigerant circuit A and moisture adsorption means 16.

<Refrigerant circuit>
The refrigerant circuit A is formed by sequentially connecting the compressor 13, the third heat exchanger 11c, the flow path switching device 15, the first heat exchanger 11a, the expansion device 14, and the second heat exchanger 11b with refrigerant pipes. The refrigerant circulates.

(Refrigerant)
The refrigerant applied to the refrigerant circuit A of this embodiment is an HFC refrigerant such as R410A, R407C, R404A, or R134a. Note that the refrigerant applied to the refrigerant circuit A of this embodiment may be an HCFC refrigerant such as R22, or a natural refrigerant such as hydrocarbon or helium. For example, in the case of using a CO ₂ refrigerant, when the high pressure is an operation higher than the critical pressure, the condenser functions as a radiator.

(Compressor)
The compressor 13 sucks in refrigerant, compresses it, and discharges it in a high-temperature and high-pressure state. The compressor 13 is an inverter compressor that is controlled by an inverter, for example, and can change the capacity (the amount of refrigerant sent out per unit time) by arbitrarily changing the operating frequency. In the example of FIG. 1, one compressor 13 is described, but the dehumidifying device 100 of the example of this embodiment includes, for example, two or more compressors connected in parallel or in series. It may be.

(1st heat exchanger, 2nd heat exchanger, 3rd 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, for example, fins configured to include a heat transfer tube through which a refrigerant flows and a large number of fins attached to the heat transfer tube. And tube type heat exchanger. The first heat exchanger 11a, the expansion device 14, and the second heat exchanger 11b are connected in series. The third heat exchanger 11 c 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 11 c is connected to the discharge side of the compressor 13 and the other is connected to the flow path switching device 15.

(Aperture device)
The expansion device 14 is for reducing the pressure of the refrigerant, and is, for example, an electronic expansion valve that can adjust the opening of the expansion by a stepping motor. By adjusting the opening degree of the expansion device 14, the flow rate of the refrigerant flowing through the refrigerant circuit A is adjusted. The throttling device 14 may be a mechanical expansion valve that employs a diaphragm for the pressure receiving portion, or may be a capillary tube. The expansion device 14 is disposed between the first heat exchanger 11a and the second heat exchanger 11b. That is, one of the expansion devices 14 is connected to the first heat exchanger 11a, and the other is connected to the second heat exchanger 11b.

(Flow path switching device)
As shown in FIG. 1, the flow path switching device 15 switches the flow direction of the refrigerant flowing in the refrigerant circuit A by switching the flow path to a solid line state or a broken line state. It is configured. The flow path switching device 15 can also be configured by a combination of a plurality of two-way valves, for example. The flow path switching device 15 includes a side of the first heat exchanger 11a to which the expansion device 14 is not connected, a side of the second heat exchanger 11b to which the expansion device 14 is not connected, and the third heat exchanger 11c. The discharge side of the compressor 13 is connected to the unconnected side and the suction side of the compressor 13. When the flow path switching device 15 is switched to the solid line state, the side to which the discharge side of the compressor 13 of the third heat exchanger 11c is not connected and the expansion device 14 of the first heat exchanger 11a are connected. The side that is not connected is communicated, and the side of the second heat exchanger 11b that is not connected to the expansion device 14 and the suction side of the compressor 13 are communicated. Moreover, when the flow path switching device 15 is switched to the broken line state, the side to which the discharge side of the compressor 13 of the third heat exchanger 11c is not connected and the expansion device 14 of the second heat exchanger 11b. The side to which is not connected is communicated, and the side to which the expansion device 14 of the first heat exchanger 11a is not connected is communicated to the suction side of the compressor 13.

<Moisture adsorption means>
The moisture adsorption means 16 adsorbs or desorbs moisture contained in the air. The moisture adsorbing means 16 is formed of, for example, a porous material through which air can pass and an adsorbent that covers the surface of the porous material. The adsorbent is attached to the surface of the porous material by, for example, coating, surface treatment, or impregnation treatment. As the adsorbent, for example, a material having a function of absorbing moisture from air with relatively high humidity and releasing it into air with relatively low humidity, such as zeolite, silica gel, or activated carbon, is used.

  The moisture adsorbing means 16 is disposed in the air path between the first heat exchanger 11a and the second heat exchanger 11b. The air path will be described later. The moisture adsorbing means 16 has, for example, substantially the same cross-sectional shape as the cross-sectional shape of the air passage so that the cross-sectional area with respect to the cross-sectional area of the air passage becomes large. The moisture adsorbing means 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 such as a polygon or a circle other than a square. For example, the air passing through the air passage passes through the moisture adsorbing means 16 along the thickness direction of the moisture adsorbing means 16.

<Airway>
The dehumidifying apparatus 100 has an air path between a suction port 102 that sucks in indoor air, which is a dehumidifying target space, and a blower outlet 104 that blows out dehumidified air that has been dehumidified from the suction port 102. . As shown by the arrows in FIG. 1, the air path is the air that has been sucked from the suction port 102 in the order of the first heat exchanger 11a, the moisture adsorbing means 16, the second heat exchanger 11b, and the third heat exchanger 11c. It is formed to pass through and blow out from the outlet 104.

  The dehumidifying device 100 includes temperature sensors 1 a to 1 h, temperature and humidity sensors 2 a to 2 e, a wind speed sensor 3, a control device 5, an input device 6, and a blower device 12.

(Blower)
The air blower 12 is disposed in the air passage of the dehumidifying device 100, sucks air from the suction port 102, passes the sucked air through the air passage, and blows out air that has passed through the air passage from the air outlet 104. Is generated. By operating the air blower 12, the air sucked from the suction port 102 passes through the first heat exchanger 11a, the moisture adsorbing means 16, the second heat exchanger 11b, and the third heat exchanger 11c in this order. It blows out from the blower outlet 104. The blower device 12 includes, for example, a motor such as a DC fan motor and a fan such as a centrifugal fan or a multiblade fan attached to the motor, and can adjust the air volume. In addition, the air blower 12 may include an AC fan motor, for example, and may have a constant air volume. Although the air blower 12 is arrange | positioned downstream of the 3rd heat exchanger 11c used as the most downstream of an air path in the example of FIG. 1, the position in which the air blower 12 is arrange | positioned is not specifically limited. For example, the air blower 12 may be arrange | positioned upstream of the 1st heat exchanger 11a used as the most upstream of an air path.

(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, and the temperature sensor 1b detects the temperature of the refrigerant on the suction side of the compressor 13, and includes the temperature sensor 1c and the temperature sensor. 1d detects 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, and the temperature sensor 1e and the temperature sensor 1f are the second heat exchanger 11b. The temperature sensor 1g and the temperature sensor 1h detect the temperature of the refrigerant flowing into the third heat exchanger 11c, or the temperature of the refrigerant flowing out of the second heat exchanger 11b. The temperature of the refrigerant flowing out from the heat exchanger 11c is detected.

(Temperature and humidity sensor)
The temperature and humidity sensors 2a to 2e detect the temperature and humidity of the air passing through the air path. The temperature / humidity sensor 2a detects the temperature / humidity of the air before flowing into the dehumidifying device 100 from the room which is the dehumidifying target space and passing through the first heat exchanger 11a. The temperature / humidity sensor 2b The temperature / humidity sensor 2c passes through the heat exchanger 11a and detects the temperature / humidity of the air before passing through the moisture adsorption means 16, and the temperature / humidity sensor 2c passes through the moisture adsorption means 16 and passes through the second heat exchanger 11b. The temperature / humidity sensor 2d detects the temperature / humidity of the air before passing through the second heat exchanger 11b and before passing through the third heat exchanger 11c. The temperature and humidity sensor 2e detects the temperature and humidity of the air after passing through the third heat exchanger 11c.

(Wind speed sensor)
The wind speed sensor 3 detects the wind speed of the air passing through the wind path. In the example of FIG. 1, the wind speed sensor 3 is disposed on the downstream side of the third heat exchanger 11c, which is the most downstream of the wind path, but the position where the wind speed sensor 3 is disposed is not particularly limited. . For example, the wind speed sensor 3 only needs to be disposed at a position where the wind speed of the air passing through the wind path can be detected, and is disposed on the upstream side of the first heat exchanger 11a which is the most upstream of the wind path. May be.

(Input device)
The input device 6 inputs an instruction to the dehumidifying device 100 and is a sensor that receives a signal from a remote controller (not shown), for example. For example, the user can use a remote controller (not shown) to give instructions for starting and stopping the dehumidifying operation, instructions regarding the strength of dehumidification, and the like. The instruction input to the input device 6 is input to the control device 5.

(Control device)
The control device 5 performs overall control of the dehumidifying device 100, and includes, for example, hardware such as an analog circuit or digital circuit, or software such as a program executed by an arithmetic device such as a microcomputer or CPU. It consists of As shown in FIG. 2, the control device 5 is input to the input device 6, for example, the detection results of the temperature sensors 1 a to 1 h, the detection results of the temperature / humidity sensors 2 a to 2 e, the detection result of the wind speed sensor 3. The instruction and the information stored in the storage unit 7 are acquired, and using the acquired detection result, instruction, information, and the like, the blower device 12, the compressor 13, the expansion device 14, the flow path switching device 15 and the like are set. Control. The storage unit 7 includes, for example, a non-volatile memory, and stores information such as a program for controlling the dehumidifying device 100 and parameters for controlling the dehumidifying device 100.

  FIG. 3 is a diagram illustrating an example of the relationship between the adsorption amount of the moisture adsorption unit illustrated in FIG. 1 and the relative humidity. In FIG. 3, the horizontal axis indicates the relative humidity of the air flowing into the moisture adsorbing means 16, and the vertical axis indicates the equilibrium adsorption amount of the moisture adsorbing means 16, that is, the amount of moisture that can be adsorbed by the adsorbent of the moisture adsorbing means 16. Yes. As shown in FIG. 3, the equilibrium adsorption amount of the moisture adsorption unit 16 varies depending on the relative humidity of the air flowing into the moisture adsorption unit 16. That is, when the relative humidity of the air flowing into the moisture adsorbing means 16 is high, the moisture adsorbed by the moisture adsorbing means 16 becomes difficult to be released, and the amount of moisture that can be adsorbed by the moisture adsorbing means 16 increases. On the other hand, when the relative humidity of the air flowing into the moisture adsorbing means 16 is low, the moisture adsorbed by the moisture adsorbing means 16 is easily released, and the amount of moisture that can be adsorbed by the moisture adsorbing means 16 is reduced.

  In the example of this embodiment, for example, the equilibrium adsorption amount when the relative humidity of the air flowing into the moisture adsorption unit 16 is 80% or more and the relative humidity of the air flowing into the moisture adsorption unit 16 is 40 to 60%. The water adsorption means 16 having a large difference from the equilibrium adsorption amount at the time of is used. That is, the adsorbent applied to the moisture adsorbing means 16 has an equilibrium adsorption amount when the relative humidity of the air flowing into the moisture adsorbing means 16 is 80% or more and the relative humidity of the air flowing into the moisture adsorbing means 16. A thing with a big difference with the equilibrium adsorption amount when it is 40 to 60% is used. By using the moisture adsorption means 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 ability and desorption ability of the moisture adsorption means 16 are improved. FIG. 3 shows a difference h between the equilibrium adsorption amount when the relative humidity is 80% and the equilibrium adsorption amount when the relative humidity is 50%.

[Operation of dehumidifier]
Next, an example of operation | movement of the dehumidification apparatus 100 of the example of this embodiment is demonstrated. The dehumidifying apparatus 100 of the example of this embodiment performs the dehumidifying operation by alternately executing the first operation mode and the second operation mode as described below. This is because the amount of moisture that can be adsorbed by the moisture adsorbing means 16 is limited, and if the operation of adsorbing moisture contained in the air by the moisture adsorbing means 16 is continued for a long time, the moisture adsorbing means 16 receives moisture. Will not be adsorbed. Therefore, the dehumidifying device 100 of the example of this embodiment includes an operation mode for desorbing moisture held in the moisture adsorption means 16, an operation mode for the moisture adsorption means 16 to adsorb moisture contained in the air, Perform dehumidifying operation while alternately switching between.

<First operation mode>
First, the first operation mode will be described. In the first operation mode, the moisture held in the moisture adsorbing means 16 is desorbed.

(Operation of refrigerant circuit in first operation mode)
In the first operation mode, the flow path switching device 15 is switched to the state shown by the solid line in FIG. That is, the flow path switching device 15 connects the third heat exchanger 11c and the first heat exchanger 11a, and connects the second heat exchanger 11b 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 11c. A part of the refrigerant flowing into the third heat exchanger 11c is condensed and liquefied by exchanging heat with air and radiating heat to the air. The refrigerant partially condensed and liquefied in the third heat exchanger 11c passes through the flow path switching device 15 and flows into the first heat exchanger 11a. The refrigerant that has flowed into the first heat exchanger 11a exchanges heat with air and dissipates heat to the air, so that the refrigerant is condensed 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 11b. The refrigerant flowing into the second heat exchanger 11b evaporates by exchanging heat with air and absorbing heat from the air. The refrigerant evaporated in the second heat exchanger 11b passes through the flow path switching device 15, is sucked into the compressor 13, and is compressed again.

(Air state change in the first operation mode)
FIG. 4 is a diagram illustrating an example of air state change in the first operation mode of the dehumidifying device illustrated in FIG. 1. In FIG. 4, the horizontal axis indicates the dry bulb temperature of air, the vertical axis indicates the absolute humidity of air, and the curve indicates saturated air, that is, relative humidity of 100%. Moreover, in FIG. 4, the point 1-1 has shown the state of the air suck | inhaled by the dehumidifier 100 from the suction inlet 102, and the point 1-2 has shown the air after passing the 1st heat exchanger 11a. The point 1-3 shows the state of the air after passing through the moisture adsorption means 16, and the point 1-4 shows the state of the air after passing through the second heat exchanger 11b. The point 1-5 shows the state of the air after passing through the third heat exchanger 11c.

  The air (point 1-1 in FIG. 4) of the dehumidifying target space sucked into the dehumidifying device 100 from the suction port 102 in FIG. 1 passes through the first heat exchanger 11a functioning as a condenser, It is heated by exchanging heat with the refrigerant, and becomes high temperature and low relative humidity air (point 1-2).

  The high-temperature and low-relative-humidity air that has passed through the first heat exchanger 11a (point 1-2) becomes air that has been humidified by passing through the moisture adsorption means 16 (point 1-3). That is, the air passing through the moisture adsorbing means 16 is air having a relative humidity of 40 to 60% RH and a low relative humidity, as indicated by a point 1-2. The moisture contained in 16 is desorbed (released). In addition, the air is cooled by desorption heat accompanying the desorption of moisture from the air that has flowed into the moisture adsorbing means 16, and the state of point 1-3 is obtained.

  The air (point 1-3) that has passed through the moisture adsorption means 16 passes through the second heat exchanger 11b functioning as an evaporator and is cooled by exchanging heat with the refrigerant (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 that has passed through the moisture adsorption means 16 (point 1-3). The air (point 1-3) that has passed through the moisture adsorbing means 16 is cooled and dehumidified by passing through the second heat exchanger 11b, and becomes air with low temperature and high relative humidity (point 1). -4). The air (point 1-4) that has passed through the second heat exchanger 11b passes through the third heat exchanger 11c functioning as a condenser and is heated by exchanging heat with the refrigerant (point 1-5). The air is blown out from the air outlet 104 into the dehumidifying target space.

<Second operation mode>
Next, the second operation mode will be described. In the second operation mode, the moisture adsorbing means 16 adsorbs moisture contained in the air.

(Operation of refrigerant circuit in second operation mode)
In the second operation mode, the flow path switching device 15 is switched to the state indicated by the broken line in FIG. 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 11c. A part of the refrigerant flowing into the third heat exchanger 11c is condensed and liquefied by exchanging heat with air and radiating heat to the air. The refrigerant partially condensed and liquefied in the third heat exchanger 11c passes through the flow path switching device 15 and flows into the second heat exchanger 11b. The refrigerant that has flowed into the second heat exchanger 11b exchanges heat with air and dissipates heat to the air, thereby condensing and flowing 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 11a. The refrigerant flowing into the first heat exchanger 11a evaporates by exchanging heat with air and absorbing heat from the air. The refrigerant evaporated in the first heat exchanger 11a passes through the flow path switching device 15, is sucked into the compressor 13, and is compressed again.

(Air state change in the second operation mode)
FIG. 5 is a diagram illustrating an example of a change in air state in the second operation mode of the dehumidifying device illustrated in FIG. 1. In FIG. 5, the horizontal axis indicates the dry bulb temperature of air, the vertical axis indicates the absolute humidity of air, and the curve indicates saturated air, that is, relative humidity of 100%. Moreover, in FIG. 5, the point 2-1 has shown the state of the air suck | inhaled by the dehumidifier 100 from the suction inlet 102, and the point 2-2 of the air after passing the 1st heat exchanger 11a. The point 2-3 shows the state of the air after passing through the moisture adsorption means 16, and the point 2-4 shows the state of the air after passing through the second heat exchanger 11b. The point 2-5 shows the state of the air after passing through the third heat exchanger 11c.

  The air (point 2-1 in FIG. 5) in the dehumidification target space sucked into the dehumidifying device 100 from the suction port 102 in FIG. 1 passes through the first heat exchanger 11a functioning as an evaporator, It is cooled by exchanging heat with the refrigerant (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 (point 2-1) in the dehumidification target space. The air (point 2-1) in the dehumidification target space is cooled and dehumidified by passing through the first heat exchanger 11a, and becomes air having a low temperature and a high relative humidity (point 2-2).

  The low-temperature and high-relative-humidity air (point 2-2) that has passed through the first heat exchanger 11a passes through the moisture adsorption means 16 and becomes dehumidified air (point 2-3). That is, the air passing through the moisture adsorbing means 16 is air having a relative humidity of 70 to 90% RH and a high relative humidity, as indicated by a point 2-2. Therefore, the moisture adsorbing means 16 is included in the air. Adsorbs moisture. Note that the air passing through the moisture adsorbing means 16 is heated by the heat of adsorption generated by the moisture adsorbing means 16 adsorbing moisture, and is in the state of point 2-3.

  The air that has passed through the moisture adsorbing means 16 passes through the second heat exchanger 11b functioning as a condenser, and is heated by exchanging heat with the refrigerant (point 2-4). The air (point 2-4) that has passed through the second heat exchanger 11b passes through the third heat exchanger 11c functioning as a condenser and is heated by exchanging heat with the refrigerant (point 2-5). The air is blown out from the air outlet 104 into the dehumidifying target space.

  By the way, switching of the operation mode between the first operation mode and the second operation mode is performed by switching the flow path switching device 15 and switching the direction of the refrigerant flowing in the refrigerant circuit A as described above. Therefore, when the operation mode is switched, the refrigerant functions as a condenser before switching the operation mode, and the refrigerant stays in the heat exchanger that functions as the evaporator after the operation mode is switched. It takes a long time to be converted. As a result, it takes a long time for the operation of the refrigerant circuit A in the switched operation mode to stabilize after the operation mode is switched. Therefore, the dehumidifying apparatus 100 of the example of this embodiment is configured as follows.

[Configuration of control device]
FIG. 6 is a diagram schematically illustrating an example of the configuration of the control device illustrated in FIG. 1. As illustrated 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 determination unit 51 uses 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 determination unit 52, and the like. Thus, the opening degree of the expansion device 14 is determined. The expansion device control unit 53 controls the expansion device 14 by using information on the opening determined by the opening 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. The determination of the switching of the operation mode between the first operation mode and the second operation mode is performed by, for example, the temperature of the air before passing through the moisture adsorption means 16 and the temperature of the air after passing through the moisture adsorption means 16 This is done using the temperature difference. The determination of switching between the first operation mode and the second operation mode is not limited to the above example. For example, the time, the temperature difference before and after the moisture adsorption unit 16, and the before and after the moisture adsorption unit 16 are determined. It can be performed using the absolute humidity difference, the amount of change in relative humidity before and after the moisture adsorbing means 16, and the like. In addition, for example, the determination of switching between the first operation mode and the second operation mode can be performed using fluctuations in the pressure loss of the air passage. This is because the moisture adsorbing means 16 swells by adsorbing moisture, so that the pressure loss of the air passage varies depending on the amount of moisture adsorbed by the moisture adsorbing means 16. The flow channel switching device control unit 54 performs flow channel switching of the flow channel switching device 15 using the determination result of the operation mode switching determination unit 52.

[Specific operation of dehumidifier]
FIG. 7 is a diagram illustrating an example of the operation of the dehumidifying device illustrated in FIG. As shown in FIG. 7, for example, when the dehumidifying device 100 starts the dehumidifying operation in step S02, the superheat degree control of the refrigerant circuit A is performed in steps S04 to S08. That is, in step S04, the opening degree determination unit 51 illustrated in FIG. 6 acquires the detection result of the temperature sensor. In step S06, the opening degree determination unit 51 uses the detection result of the temperature sensor to determine the normal control opening degree Op of the expansion device 14 so that the degree of superheat becomes appropriate. In step S06, the expansion device controller 53 sets the opening of the expansion device 14 to the normal control opening Op determined by the opening determination unit 51.
For example, in the first operation mode, 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 1e, are used. The degree of superheat (SH) is calculated. Specifically, in the first operation mode, the low-pressure saturation temperature of the refrigerant circuit A, which is the temperature detected by the temperature sensor 1f, is reduced from the temperature of the outlet of the second heat exchanger 11b, which is the temperature detected by the temperature sensor 1e. Thus, the degree of superheat is calculated. Then, for example, it is determined whether the calculated superheat degree is in an appropriate region centered on the appropriate value of the superheat degree, and the opening degree of the expansion device 14 is increased, decreased, or maintained. By performing the above, superheat degree control is performed so that the superheat degree of the refrigerant circuit A falls within an appropriate range.
Further, for example, in the second operation mode, the low-pressure saturation temperature of the refrigerant circuit A that is the temperature detected by the temperature sensor 1d and the temperature of the outlet of the first heat exchanger 11a that is the temperature detected by the temperature sensor 1c. Using it, the degree of superheat (SH) is calculated. Specifically, in the second operation mode, the low-pressure saturation temperature of the refrigerant circuit A, which is the temperature detected by the temperature sensor 1d, is reduced from the temperature of the outlet of the first heat exchanger 11a, which is the temperature detected by the temperature sensor 1c. Thus, the degree of superheat is calculated. Then, for example, it is determined whether the calculated superheat degree is in an appropriate region centered on the appropriate value of the superheat degree, and the opening degree of the expansion device 14 is increased, decreased, or maintained. By performing the above, superheat degree control is performed so that the superheat degree of the refrigerant circuit A falls within an appropriate range.
The range in which the degree of superheat is appropriate varies depending on, for example, the configuration of the refrigerant circuit A and is not a fixed value.

  In step S10 in FIG. 7, the operation mode switching determination unit 52 in FIG. 6 determines whether or not to switch the operation mode. If it is determined not to switch the operation mode, the process returns to step S04, and the superheat degree control of the refrigerant circuit A is continued. When it is determined in step S10 that the operation mode is to be switched, the process proceeds to step S12, and the flow path switching device control unit 54 switches the flow path switching device 15 so that the operation from the first operation mode to the second operation mode is performed. The mode is switched or the operation mode is switched from the second operation mode to the first operation mode.

  In step S14, the opening degree determination unit 51 uses the normal control opening degree Op that is the opening degree of the expansion device 14 before switching the operation mode, and opens the first opening that is larger than the normal control opening degree Op. The degree Op1 is determined. Information on the control amount for increasing the opening of the expansion device 14 from the normal control opening Op to the first opening Op1 is set in advance and stored in the storage unit 7. For example, the first opening Op1 is twice or more the normal control opening Op, and becomes extremely larger than the normal control opening Op. Note that 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 expansion device control unit 53 sets the opening of the expansion device 14 to the first opening Op1 determined by the opening determination unit 51 in step S14. In step S18, the first set time T1 is awaited. The first set time T1 is set in advance and stored in the storage unit 7. For example, the first set time T1 is 60 seconds. Note that the first set time T1 varies 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 opening of the expansion device 14 is set to the first opening Op1 that is larger than the normal control opening Op before the operation mode is switched, and the first set time T1. By operating the refrigerant circuit A over the entire range, the distribution of the refrigerant in the refrigerant circuit A is quickly optimized. This is because by operating the refrigerant circuit A by increasing the opening of the expansion device 14, it functions as a condenser before switching the operation mode, and stays in the heat exchanger that functions as an evaporator after switching the operation mode. The refrigerant being circulated through the refrigerant circuit A is quickly circulated.

  When the first set time T1 elapses in step S18, in step S20, the opening degree determination unit 51 uses the first opening degree Op1 to set the second opening degree Op2 that is smaller than the first opening degree Op1. To decide. Information on the control amount for reducing the opening of the expansion device 14 from the first opening Op1 to the second opening Op2 is set in advance and stored in the storage unit 7. For example, the second opening Op2 is equal to or less than one third of the first opening Op1, and is smaller than the normal control opening Op that is the opening of the expansion device 14 before switching the operation mode. That is, the second opening Op2 is extremely smaller than the first opening Op1. Note that the control amount for reducing the opening of the expansion device 14 from the first opening Op1 to the second opening Op2 differs depending on the configuration of the refrigerant circuit A and the like, and is not a fixed value. In step S22, the expansion device control unit 53 sets the opening of the expansion device 14 to the second opening Op2 determined by the opening determination unit 51 in step S20. In step S24, the second set time T2 is awaited. The second set time T2 is set in advance and stored in the storage unit 7. For example, the second set time T2 is 60 seconds. Note that the second set time T2 varies depending on the configuration of the refrigerant circuit A and the like, and is not a fixed value. As described above, after the first set 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 over the second set time period T2. By operating, the operation of the refrigerant circuit A can be quickly stabilized.

  When the second set time T2 has elapsed in step S24, the process returns to step S04, and the superheat control of the refrigerant circuit A is resumed.

As described above, the dehumidifying device 100 according to the present embodiment connects the compressor 13, the flow path switching device 15, the first heat exchanger 11a, the expansion device 14, and the second heat exchanger 11b with refrigerant piping. The air path in which the refrigerant circuit A, the first heat exchanger 11a, the moisture adsorption means 16 for adsorbing and desorbing moisture, and the second heat exchanger 11b are sequentially arranged, and the air in the dehumidification target space are converted into the first heat. The blower 12 that flows in the order of the exchanger 11a, the moisture adsorbing means 16, and the second heat exchanger 11b, the first heat exchanger 11a functions as a condenser or a radiator, and the second heat exchanger 11b is an evaporator. The first operation mode for desorbing the moisture held in the moisture adsorbing means 16, the first heat exchanger 11a functions as an evaporator, and the second heat exchanger 11b as a condenser or radiator Function and the moisture adsorption means 16 passes through the air passage. And a control device 5 that performs a dehumidifying operation for alternately switching the second operation mode for adsorbing moisture from the air to be performed by switching the flow path of the flow path switching device 15. When the operation mode is switched 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 14 is set to the normal value of the expansion device 14 before the operation mode is switched. The first opening Op1 that is larger than the control opening Op is set to operate the refrigerant circuit A for a first setting time T1 that is set in advance. After the first setting time T1 has elapsed, the opening of the expansion device 14 Is set to a second opening Op2 smaller than the first opening Op1, and the refrigerant circuit A is operated for a second set time T2 set in advance.
In the dehumidifying device 100 of the example of this embodiment, when the operation mode is switched, the opening of the expansion device 14 is set to the first opening Op1 that is larger than the normal control opening Op before the operation mode is switched. Thus, since the refrigerant circuit A is operated for the first set time T1, the distribution of the refrigerant is promptly optimized. This is because by operating the refrigerant circuit A by increasing the opening of the expansion device 14, it functions as a condenser before switching the operation mode, and stays in the heat exchanger that functions as an evaporator after switching the operation mode. The circulating refrigerant can be quickly circulated through the refrigerant circuit A.
Furthermore, in the dehumidifying device 100 of the example of this embodiment, after the first set time T1 has elapsed, the opening of the expansion device 14 is set to a second opening Op2 that is smaller than the first opening Op1. Since the refrigerant circuit A is operated for the preset second set time T2, the operation of the refrigerant circuit A can be quickly stabilized. For example, when the normal control of the expansion device 14 (the above-described superheat degree control) is performed from the state of the first opening Op1 where the opening of the expansion device 14 is large, the opening of the expansion device 14 becomes the normal control opening Op. Thus, it takes a long time for the operation of the refrigerant circuit A to stabilize. In the dehumidifying device 100 of the example of this embodiment, when the operation mode is switched, the opening of the expansion device 14 is set to the first opening Op1 that is larger than the normal control opening Op, and the first set time After the refrigerant circuit A is operated over T1 and the first set time T1 has elapsed, the opening of the expansion device 14 is set to a second opening Op2 that is smaller than the first opening Op1, By operating the refrigerant circuit A for two set times T2, the operation of the refrigerant circuit A can be quickly stabilized.
As described above, since the dehumidifying apparatus 100 of the example of this embodiment can quickly stabilize the operation of the refrigerant circuit A after switching the operation mode, the moisture adsorption means 16 efficiently absorbs moisture. Can be desorbed. Therefore, the dehumidifying device 100 of the example of this embodiment has an improved dehumidifying effect.

  For example, the second opening Op2 is configured to be smaller than the normal control opening Op before switching the operation mode, and the operation of the refrigerant circuit A can be stabilized more quickly.

  Further, for example, the dehumidifying device 100 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. A third heat exchanger 11c is further provided. In each of the first operation mode and the second operation mode, the configuration having the third heat exchanger 11c that functions as a condenser or a radiator functions as a condenser before switching the operation mode, Since the amount of refrigerant remaining in the heat exchanger that functions as an evaporator after switching can be reduced, the distribution of the refrigerant after switching the operation mode is quickly optimized.

  The present invention is not limited to the above-described embodiment, and various modifications can be made within the scope of the present invention. That is, the configuration of the above embodiment may be improved as appropriate, or at least a part of the configuration may be replaced with another configuration. Further, the configuration requirements that are not particularly limited with respect to the arrangement are not limited to the arrangement disclosed in the embodiment, and can be arranged at a position where the function can be achieved.

  For example, the third heat exchanger 11c illustrated in FIG. 1 may be omitted, and a heating device such as an electric heater for heating air may be disposed on the downstream side of the second heat exchanger 11b in the air path. Moreover, the 3rd heat exchanger 11c described in FIG. 1 may be abbreviate | omitted simply.

  In addition, for example, in the above description, the dehumidifying device 100 including the temperature sensors 1a to 1h, the temperature and humidity sensors 2a to 2e, and the wind speed sensor 3 has been described. However, the sensors included in the dehumidifying device 100 include the dehumidifying device 100. However, the present invention is not limited to the above sensor. For example, the dehumidifying device 100 may be one in which one or more of the temperature sensors 1a to 1h, the temperature and humidity sensors 2a to 2e, and the wind speed sensor 3 are omitted, or the temperature, humidity, and wind speed. Alternatively, a further sensor for detecting pressure or the like may be provided.

  1a to 1h temperature sensor, 2a to 2e temperature and humidity sensor, 3 wind speed sensor, 5 control device, 6 input device, 7 storage unit, 11a first heat exchanger, 11b second heat exchanger, 11c third heat exchanger, 12 air blower, 13 compressor, 14 throttle device, 15 flow path switching device, 16 moisture adsorption means, 51 opening determination unit, 52 operation mode switching determination unit, 53 throttle device control unit, 54 flow channel switching device control unit, DESCRIPTION OF SYMBOLS 100 Dehumidifier, 102 Inlet, 104 Outlet, A Refrigerant circuit, Op Normal control opening degree, Op1 1st opening degree, Op2 2nd opening degree, T1 1st setting time, T2 2nd setting time

A dehumidifying device according to the present invention includes a refrigerant circuit in which a compressor, a flow path switching device, a first heat exchanger, a throttling device, and a second heat exchanger are connected by a refrigerant pipe, the first heat exchanger, moisture The moisture adsorbing means for adsorbing and desorbing the air, and the air passage in which the second heat exchanger is sequentially arranged, and the air in the space to be dehumidified are converted into the first heat exchanger, the moisture adsorbing means, the second heat exchanger The first heat exchanger functions as a condenser or a radiator, and the second heat exchanger functions as an evaporator, and desorbs moisture held in the moisture adsorbing means. And the first heat exchanger functions as an evaporator, the second heat exchanger functions as a condenser or a radiator, and the moisture adsorbing means is from the air passing through the air path. The second operation mode for adsorbing moisture is defined as the channel switching of the channel switching device. And a control device that performs a dehumidifying operation that is alternately switched by the control device, wherein the control device switches the operation mode from the first operation mode to the second operation mode, or from the second operation mode to the first operation mode. When the operation mode is switched to the operation mode, the opening of the expansion device is set to a first opening that is larger than the normal control opening before the operation mode is switched, and a preset first set time, After the refrigerant circuit is operated and the first set time elapses, the opening of the expansion device is set to a second opening that is smaller than the first opening, and a preset second set time. The refrigerant circuit is operated , and the second opening is smaller than the normal control opening before switching the operation mode .

Claims (6)

A refrigerant circuit in which a compressor, a flow path switching device, a first heat exchanger, a throttling device, and a second heat exchanger are connected by a refrigerant pipe;
An air passage in which the first heat exchanger, moisture adsorption means for adsorbing and desorbing moisture, and the second heat exchanger are sequentially arranged;
A blower for flowing air in a dehumidification target space in the order of the first heat exchanger, the moisture adsorption means, and the second heat exchanger;
A first operation mode in which the first heat exchanger functions as a condenser or a radiator, the second heat exchanger functions as an evaporator, and desorbs moisture held in the moisture adsorbing means; A second operation mode in which the first heat exchanger functions as an evaporator, the second heat exchanger functions as a condenser or a radiator, and the moisture adsorption means adsorbs moisture from the air passing through the air passage. And a control device that performs a dehumidifying operation that is alternately switched by channel switching of the channel switching device,
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 control device The opening degree is set to a first opening degree that is larger than the normal control opening degree before switching the operation mode, and the refrigerant circuit is operated for a preset first setting time, and the first setting time has elapsed. Later, the opening of the expansion device is set to a second opening that is smaller than the first opening, and the refrigerant circuit is operated for a preset second setting time.
Dehumidifier. The second opening is smaller than the normal control opening before switching the operation mode,
The dehumidifying device according to claim 1. The first opening is at least twice as large as the normal control opening, and the second opening is at most one-third of the first opening.
The dehumidifying device according to claim 1 or 2. Third heat that is arranged in the refrigerant circuit between the discharge side of the compressor and the flow path switching device and functions as a condenser or a radiator in each of the first operation mode and the second operation mode. Further having an exchanger,
The dehumidification apparatus of any one of Claims 1-3. The third heat exchanger is disposed downstream of the second heat exchanger in the air path.
The dehumidifying device according to claim 4. A refrigerant circuit in which a compressor, a flow path switching device, a first heat exchanger, a throttling device, a second heat exchanger, and a third heat exchanger are connected by refrigerant piping;
An air passage in which the first heat exchanger, moisture adsorption means for adsorbing and desorbing moisture, and the second heat exchanger are sequentially arranged;
An air blower for flowing the air in the dehumidification target space in the order of the first heat exchanger, the moisture adsorption means, and the second heat exchanger;
The third heat exchanger is disposed in the refrigerant circuit between a discharge side of the compressor and the flow path switching device;
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 to desorb moisture held in the moisture adsorption means. The first operation mode, the first heat exchanger functions as an evaporator, the third heat exchanger and the second heat exchanger function as a condenser or a radiator, and the moisture adsorption means is the wind The second operation mode for adsorbing moisture from the air passing through the path is switched alternately by the channel switching of the channel switching device.
Dehumidifier.

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