JP2018115821A - Air conditioning system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To adjust temperature and humidity and efficiently operate a heat pump with a simple configuration.SOLUTION: An air conditioning system controls a flow direction of a medium by route switching means 6 and operation of an opening state and a throttle state of a first expansion valve 3 and a second expansion valve 4, controls latent heat and sensible heat of fluid exchanged by a first heat exchanger 1, a second heat exchanger 2 and a third heat exchanger 7 individually to adjust temperature and humidity, and efficiently operates a heat pump with a simple configuration.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a desiccant heat exchanger and an air conditioning system that adjusts temperature and humidity using a heat pump system.

  Conventionally, an air conditioning system using a desiccant material that adsorbs moisture of a fluid by contacting the fluid under cooling and desorbs moisture adsorbed by contacting the fluid under heating is known (for example, Patent Document 1).

  By combining an air conditioning system using a desiccant material and a heat pump system that compresses the medium and distributes it to the heat exchanger, an air conditioning system that can optimally adjust the humidity can be constructed. Further, by using a temperature adjusting device for adjusting the air temperature, an air conditioning system capable of optimally adjusting the humidity during cooling and heating can be constructed.

  By the way, in the heat pump system, in the cooling operation (for example, summer), the room air is dehumidified and cooled by the refrigerant evaporative heat of the evaporator, and in the heating operation (for example, winter), the indoor air is generated by the refrigerant condensation heat of the condenser. Is warming up. During the cooling operation, it is necessary to set the evaporation temperature of the refrigerant low, so the temperature of the air flowing through the evaporator becomes low, and the air is heated and adjusted to a predetermined temperature (for example, 20 degrees to 25 degrees). There was a need. Also, during the heating operation, it is necessary to increase the condensation temperature of the condenser. Since the evaporating temperature of the refrigerant is set low and the condensing temperature is increased, a device having a high capacity is required to maintain the efficiency of the heat pump.

JP2013-155941A

  The present invention has been made in view of the above situation, and an object thereof is to provide an air conditioning system capable of adjusting temperature and humidity and capable of operating a heat pump efficiently with a simple device configuration.

  In order to achieve the above object, an air conditioner according to a first aspect of the present invention includes a first heat exchanger in which a medium flows through a heat transfer tube, and a second in which a desiccant material is applied to the outside of the heat transfer tube through which the medium flows. A heat exchanger, a first expansion valve provided in a path of the medium on one side of the second heat exchanger, the operation of which is controlled in an open state and a throttled state, and the other side of the second heat exchanger A second expansion valve provided in a path of the medium, the operation of which is controlled in an open state and a throttle state; a compression unit that compresses the medium; and the first heat of the compression medium that is a medium compressed by the compression unit And a path switching means for switching supply to the first expansion valve, the second expansion valve is connected to one side of the first heat exchanger, and the other side of the first heat exchanger And the path switching means is connected to the first switching means. Connected to expansion valve, the first heat exchanger, and the fluid whose heat has been exchanged with at least one of the second heat exchanger, characterized in that it is blown into the air conditioning portion.

In the present invention according to claim 1, the compression medium is supplied to the first heat exchanger or the first expansion valve by the path switching means.
When the compression medium is supplied to the first expansion valve, the temperature of the medium of the second heat exchanger is controlled by the operation of the first expansion valve, and the second heat exchanger operates as an evaporator for evaporating the medium. (In this case, the fluid moisture is adsorbed on the desiccant material of the second heat exchanger: dehumidification), and the situation of operating as a condenser that condenses the medium (in this case, adsorbed on the desiccant material of the second heat exchanger) The released water is released: regeneration of the desiccant). The temperature of the medium is lowered by operating the second expansion valve in the throttle state, and the first heat exchanger is operated as an evaporator (cooling).
When the compressed medium is supplied to the first heat exchanger, the hot medium is sent to the first heat exchanger and operates as a condenser (heating). A situation in which the second heat exchanger operates as an evaporator for evaporating the medium by the operation of the expansion state of the second expansion valve and the operation of the open state (in this case, the moisture of the fluid is the desiccant of the second heat exchanger) Adsorbed to the material: moisture supply for humidification), operating as a condenser to condense the medium and (in this case, the moisture adsorbed to the desiccant material of the second heat exchanger is released: humidification) It is done.

  Therefore, under the control of the path switching means, the first heat exchanger adjusts the temperature of cooling and heating (control of sensible heat), controls the operation of the first expansion valve and the second expansion valve, and controls the second heat. By performing dehumidification and humidification (control of latent heat) with the exchanger, the latent sensible heat of the fluid to be heat-exchanged can be individually controlled. Therefore, the temperature and humidity can be adjusted, and the heat pump can be operated efficiently with a simple device configuration.

  An air conditioning system according to a second aspect of the present invention is the air conditioning system according to the first aspect, wherein the operation mode instruction information, the humidity information of the fluid to be blown to the air-conditioned part, and the air to the air-conditioned part At least one of information on the temperature of the fluid to be operated and information on the operation time of the operation mode is input, and the operation of the path switching means, the first expansion valve, and the second expansion valve is performed based on the input information. Control means for controlling is provided.

  In the second aspect of the present invention, the operation mode instruction information, the humidity information of the fluid blown into the air-conditioned part (room), the temperature information of the fluid blown into the air-conditioned part (room), the operation mode information Based on at least one of the operating time information, the operations of the path switching means, the first expansion valve, and the second expansion valve are controlled. For example, cooling and heating are switched based on the instruction information of the operation mode, and dehumidification and humidification are switched based on information on the absolute humidity of the fluid blown into the room, and the fluid blown into the room Dehumidification and humidification are switched based on the temperature information. Further, cooling and heating are switched based on information on the operation time in the operation mode.

  The air conditioning system of the present invention according to claim 3 is the air conditioning system according to claim 2, wherein the operation mode is the first heat exchanger that is an evaporator, and the desiccant material adsorbs moisture. A cooling / dehumidifying operation mode for circulating the return air of the air-conditioned part to the second heat exchanger, and a cooling operation mode for circulating the return air of the air-conditioned part to the first heat exchanger as an evaporator A heating / humidifying operation mode for circulating the return air of the air-conditioned part to the first heat exchanger to be a condenser, the second heat exchanger to desorb moisture from the desiccant material, and a condenser The first heat exchanger has a heating operation mode in which the return air of the air-conditioned part is circulated.

  In the present invention according to claim 3, it is possible to operate in the cooling / dehumidification operation mode, the cooling operation mode (without dehumidification), the heating / humidification operation mode, and the heating operation mode (without humidification).

  An air conditioning system according to a fourth aspect of the present invention is the air conditioning system according to the third aspect, wherein in the cooling operation mode, outside air is circulated to the second heat exchanger that desorbs moisture from the desiccant material. Then, moisture is discharged as a gas, and in the heating operation mode, water is replenished by passing outside air through the second heat exchanger that adsorbs moisture to the desiccant material.

  In the present invention according to claim 4, in the cooling operation mode, moisture is desorbed from the desiccant material of the second heat exchanger to release moisture to the outside air, the desiccant material is regenerated, and in the heating operation mode, the second heat Adsorb moisture from outside air to the desiccant material of the exchanger to replenish moisture during humidification.

  The air conditioning system of the present invention according to claim 5 is the air conditioning system according to claim 4, wherein when the cooling / dehumidifying operation mode is selected, the control means transfers the compression medium to the first expansion valve. The path switching means is operated so as to send the second heat exchanger, the second expansion valve, and the first heat exchanger in this order, and the first expansion valve and the second expansion valve are in a throttled state. When the cooling operation mode is selected, the path is configured to send the compression medium in the order of the first expansion valve, the second heat exchanger, the second expansion valve, and the first heat exchanger. When the switching means is operated, the first expansion valve is operated in the open state, the second expansion valve is operated in the throttle state, and the heating / humidifying operation mode is selected, the compression medium is Heat exchanger, said second expansion valve, front Operating the path switching means to send the second heat exchanger in the order of the first expansion valve, operating the first expansion valve to a throttle state, operating the second expansion valve to an open state, When the heating operation mode is selected, the path switching means is operated to send the compression medium in the order of the first heat exchanger, the second expansion valve, the second heat exchanger, and the first expansion valve. In addition, the first expansion valve and the second expansion valve are operated in a throttle state.

  In the present invention according to claim 5, by controlling the flow direction of the compression medium by the path switching means, and adjusting the temperature of the compression medium by the operation of the first expansion valve and the second expansion valve, the cooling / dehumidification operation mode, The cooling operation mode, the heating / humidification operation mode, and the heating operation mode can be appropriately switched.

  An air conditioning system according to a sixth aspect of the present invention is the air conditioning system according to any one of the first to fifth aspects, wherein the medium is disposed between the path switching unit and the first expansion valve. A temperature adjusting means for adjusting the temperature is provided.

  In the present invention according to claim 6, the temperature adjusting means can cool the high-temperature medium and use it as a condenser, or heat the low-temperature medium and use it as an evaporator.

  An air conditioning system according to a seventh aspect of the present invention is the air conditioning system according to the sixth aspect, wherein the temperature adjusting means is a third heat disposed between the path switching means and the first expansion valve. It is an exchanger.

  In the present invention according to claim 7, the third heat exchanger can be used as a condenser or an evaporator by switching the flow direction of the medium by the path switching means, and the temperature of the medium is finely controlled. Can do.

  The air conditioning system of the present invention can adjust the temperature and humidity, and can efficiently operate the heat pump with a simple device configuration.

It is a notional block diagram of the air-conditioning system concerning one example of the present invention. It is explanatory drawing of the casing which accommodates a 1st heat exchanger and a 2nd heat exchanger. It is a notional block diagram at the time of cooling. It is explanatory drawing of the casing at the time of air_conditioning | cooling. It is a conceptual block diagram at the time of heating. It is explanatory drawing of the casing at the time of heating.

  Based on FIG. 1, FIG. 2, schematic structure of the air conditioning system which concerns on one Example of this invention is demonstrated.

  FIG. 1 shows a conceptual configuration of an air conditioning system according to an embodiment of the present invention, and FIG. 2 shows a schematic configuration of a casing that houses a first heat exchanger and a second heat exchanger.

  As shown in FIG. 1, the air conditioning system of the present embodiment includes a first heat exchanger 1 in which a medium flows through a heat transfer tube, and a second heat exchanger in which a desiccant material is applied to the outside of the heat transfer tube through which the medium flows. 2 is provided. A path on one side of the second heat exchanger 2 (medium path opposite to the first heat exchanger 1) is provided with a first expansion valve 3, and the first expansion valve 3 is in an open state and a throttled state. Operation is controlled. A second expansion valve 4 is provided on the other path of the second heat exchanger 2 (medium path on the first heat exchanger 1 side), and the second expansion valve 4 is in an open state and a throttled state. The operation is controlled.

  On the other hand, a compression means 5 for compressing the medium is provided, and the medium (compression medium) compressed by the compression means 5 is connected to the first heat exchanger 1 or the first expansion valve 3 via the path switching means 6. Supply is switched to either. The second expansion valve 4 is connected to one side of the first heat exchanger 1 (medium path on the second heat exchanger 2 side), and the other side of the first heat exchanger 1 (second heat exchanger 2). The path switching means 6 is connected to the medium path on the opposite side of the medium. A third heat exchanger 7 serving as a temperature adjusting unit is disposed between the path switching unit 6 and the first expansion valve 3.

  As the temperature adjusting means, means for cooling the high temperature medium and means for raising the temperature of the low temperature medium can be applied instead of the third heat exchanger 7. Further, the third heat exchanger 7 (temperature adjusting means) can be omitted due to the temperature balance of the medium.

  Although specifically described later, the path switching unit 6 includes a port connected to the outlet side of the compression unit 5, a port connected to the inlet side of the compression unit 5, a port connected to the first heat exchanger 1, and a third heat exchanger 7. It is composed of a four-way valve having four ports connected to the (first expansion valve 3). By switching the four-way valve, the compression medium on the outlet side of the compression means 5 is supplied to the third heat exchanger 7 (first expansion valve 3) side, and the medium from the first heat exchanger 1 is compressed. The state of being supplied to the inlet side of the means 5 (operation mode using cooling) is set. Further, by switching the four-way valve, the compression medium on the outlet side of the compression means 5 is supplied to the first heat exchanger 1 side, and the medium from the third heat exchanger 7 (first expansion valve 3) is compressed. The state of being supplied to the inlet side of the means 5 (operation mode using heating) is set.

  For example, in the first heat exchanger 1 (second heat exchanger 2), the return air in the room, which is the air-conditioned part, is heat-exchanged and cooled (dehumidified), and the air is blown into the room to obtain a cooling state. . Alternatively, in the first heat exchanger 1 (second heat exchanger 2), the return air in the room that is the air-conditioned part is heat-exchanged and heated (humidified), and the heated fluid is blown into the room to obtain a heating state. . Also, outside air is sent to the second heat exchanger 2 to adsorb moisture, or moisture is desorbed from the desiccant material.

  Control of the operation of the first expansion valve 3 and the second expansion valve 4 in the throttle state and the open state and the control of the switching state of the path switching means 6 are controlled by commands of the control means 9. The control means 9 is inputted with operation mode instruction information, information on the humidity of the fluid blown into the air-conditioned part (in the room), and information on the temperature of the fluid sent into the air-conditioned part (in the room). In addition, information on the operation time in the operation mode (for example, information on a timer) is input. Based on the information input to the control means 9, the operations of the first expansion valve 3 and the second expansion valve 4 in the throttle state and the open state are controlled, and the switching state of the path switching means 6 is controlled.

  For example, cooling and heating are switched based on the instruction information of the operation mode, and dehumidification and humidification are switched based on information on the absolute humidity of the fluid blown into the room, and the fluid blown into the room Dehumidification and humidification are switched based on the temperature information. Further, the presence / absence of dehumidification is switched based on the operation time information (total dehumidifying operation time) of the operation mode.

  In the air conditioning system described above, the compression medium is supplied to the first heat exchanger 1 or the third heat exchanger 7 (first expansion valve 3) by the path switching means 6. The first heat exchanger 1 and the second heat exchanger 2 are condensers depending on the direction of the flow of the compression medium and the operation state (open state, throttle state) of the first expansion valve 3 and the second expansion valve 4, Or it operates as an evaporator.

  Therefore, under the control of the path switching means 6, the first heat exchanger 1 performs cooling and heating temperature adjustment (sensible heat control), and the second heat exchanger 2 performs dehumidification and humidification (latent heat control). Thus, the latent sensible heat of the fluid to be heat exchanged can be individually controlled. Therefore, the temperature and humidity can be adjusted, and the heat pump can be operated efficiently with a simple device configuration.

  The above-described operation modes include a cooling / dehumidifying operation mode in which indoor return air is circulated in a first heat exchanger 1 that is an evaporator, a second heat exchanger 2 that adsorbs moisture to a desiccant material, and an evaporator. A cooling operation mode in which the indoor return air is circulated in the first heat exchanger 1, a first heat exchanger 1 that is a condenser, and a second heat exchanger 2 that desorbs moisture from the desiccant material in the room The heating / humidifying operation mode for circulating the return air and the heating operation mode for circulating the indoor return air to the first heat exchanger 1 that is a condenser are provided.

  In the cooling operation mode, the desiccant material is regenerated by circulating the outside air through the second heat exchanger 2 that desorbs the moisture from the desiccant material, and the desiccant material is regenerated. Is prevented from accumulating. In the heating operation mode, the outside air is circulated through the second heat exchanger 2 that adsorbs moisture to the desiccant material, and moisture is adsorbed to replenish moisture for humidification.

  As shown in FIG. 2, the first heat exchanger 1 and the second heat exchanger 2 are accommodated in one casing 11, and the inflow of return air RA in the room, the blowing out of the air SA, the inflow of outside air OA, The exhaust EA is switched over. That is, the first heat exchanger 1 is arranged on a wall portion that partitions the case 12 on the inlet side and the case 13 on the outlet side, and the second heat exchanger 2 is a wall portion that partitions the case 14 on the inlet side and the case 15 on the outlet side. It is arranged in. The inlet-side cases 12 and 14 are partitioned by a partition wall 16.

  The case 12 on the inlet side of the first heat exchanger 1 is provided with a return air inlet 21 for sucking the return air RA1, and the case 13 on the outlet side is provided with an air outlet 22 for blowing out the air SA1. The case 14 on the inlet side of the second heat exchanger 2 is provided with a first opening 25 for sucking outside air OA2, and the case 15 on the outlet side has a second opening 26 that opens into the room and blows out the blown air SA2, and A third opening 27 is provided which opens to the outside and exhausts the exhaust gas EA2. The partition wall 16 is provided with a communication opening 28 for sending the return air RA1 flowing into the case 12 on the inlet side of the first heat exchanger 1 to the case 14 on the inlet side of the second heat exchanger 2 as the return air RA2. It has been.

  The first opening 25, the second opening 26, the third opening 27, and the communication opening 28 are provided with a first damper 35, a second damper 36, a third damper 37, and a communication damper 38, which are opened and closed individually. Opening and closing is performed in conjunction. The operations of the first damper 35, the second damper 36, the third damper 37, and the communication damper 38 are controlled by commands from the control means 9 (see FIG. 1).

  In the figure, reference numeral 31 denotes a fan on the first heat exchanger 1 side, and 32 denotes a fan on the second heat exchanger 2 side. 33 is a temperature sensor and 34 is a humidity sensor.

  The temperature sensor 33 detects the temperature of the ventilation SA1 that is heat-exchanged by the first heat exchanger and blown into the room, and outputs the detected temperature to the control means 9 (see FIG. 1). The humidity sensor 34 detects the humidity of the fluid before and after the moisture exchange in the second heat exchanger 2 and outputs it to the control means 9 (see FIG. 1). In the control means 9 (see FIG. 1), the absolute humidity is calculated from the difference in humidity.

  The control means 9 controls the operations of the first expansion valve 3 and the second expansion valve 4 in the throttling state and the open state based on the temperature and absolute humidity information of the blower SA1, and the path switching means 6 is switched. The state is controlled. Then, the operations of the first damper 35, the second damper 36, the third damper 37, and the communication damper 38 are controlled. Thereby, while cooling and heating are switched, dehumidification and humidification are switched.

  In the air conditioning system described above, when the cooling / dehumidifying operation mode is selected, the control means 9 uses the compression medium as the third heat exchanger 7, the first expansion valve 3, the second heat exchanger 2, and the second expansion valve. 4. The path switching means 6 is operated so as to be sent in the order of the first heat exchanger 1. Then, the first expansion valve 3 and the second expansion valve 4 are operated in the throttle state.

  When the cooling operation mode is selected, the compression medium is sent in the order of the third heat exchanger 7, the first expansion valve 3, the second heat exchanger 2, the second expansion valve 4, and the first heat exchanger. The path switching means 6 is operated as described above. Then, the first expansion valve 3 is operated in the open state, and the second expansion valve 4 is operated in the throttle state.

  When the heating / humidifying operation mode is selected, the compression medium is supplied to the first heat exchanger 1, the second expansion valve 4, the second heat exchanger 2, the first expansion valve 3, and the third heat exchanger 7. The path switching means 6 is operated so as to send in order. Then, the first expansion valve 3 is operated in the throttle state, and the second expansion valve 4 is operated in the open state.

  When the heating operation mode is selected, the compression medium is sent in the order of the first heat exchanger 1, the second expansion valve 4, the second heat exchanger 2, the first expansion valve 3, and the third heat exchanger 7. The path switching means 6 is operated. Then, the first expansion valve 3 and the second expansion valve 4 are operated in the throttle state.

  By controlling the flow direction of the compression medium by the path switching means 6 and adjusting the temperature of the compression medium by the operation of the first expansion valve 3 and the second expansion valve 4, the cooling / dehumidifying operation mode, the cooling operation mode (cooling / (Desorption operation mode), heating / humidification operation mode, and heating operation mode (heating / adsorption operation mode) can be appropriately switched.

  Based on FIGS. 3 to 6, a specific situation of the flow of the medium and the air-conditioned fluid in the above-described air-conditioning system will be described.

  FIG. 3 shows, for example, a conceptual configuration of an operation mode using cooling in the summer, and FIG. 4 shows a situation of the casing in the operation mode using cooling in the summer, for example. FIG. 4A shows the state of the cooling / dehumidification operation mode, and FIGS. 3B and 4B show the state of the cooling / desorption operation mode. FIG. 5 shows, for example, a conceptual configuration of an operation mode using heating in winter, and FIG. 6 shows a situation of a casing in an operation mode using heating in winter, for example. FIG. 6A shows the state of the heating / humidification operation mode, and FIGS. 5B and 6B show the state of the heating / adsorption operation mode.

  As shown in FIGS. 3 and 5, the path switching means 6 includes a four-way valve 40 having four ports. That is, the four-way valve 40 of the path switching unit 6 includes a first port 41 connected to the outlet side (compression medium discharge side) of the compression unit 5 and a second port connected to the inlet side (medium inflow side) of the compression unit 5. 42, a third port 43 connected to the first heat exchanger 1, and a fourth port 44 connected to the third heat exchanger 7 (first expansion valve 3).

  As shown in FIG. 3, when the first port 41 and the fourth port 44 are communicated by switching the four-way valve, and the second port 42 and the third port 43 are communicated, the compression on the outlet side of the compression means 5 is performed. A state in which the medium is supplied to the third heat exchanger 7 (first expansion valve 3) side and the medium from the first heat exchanger 1 is supplied to the inlet side of the compression means 5 (operation mode using cooling) ).

  As shown in FIG. 5, when the first port 41 and the third port 43 are communicated by switching the four-way valve, and the second port 42 and the fourth port 44 are communicated, the compression on the outlet side of the compression means 5 is performed. A state in which the medium is supplied to the first heat exchanger 1 side and the medium from the third heat exchanger 7 (first expansion valve 3) is supplied to the inlet side of the compression means 5 (operation mode using heating) ).

  An operation mode (cooling / dehumidification operation mode) during cooling with dehumidification will be described with reference to FIGS.

  As shown in FIG. 3 (a), the compression medium compressed by the compression means 5 flows from the first port 41 of the four-way valve to the fourth port 44, and the third heat exchanger 7, the first expansion valve 3, It sends in order of the 2nd heat exchanger 2, the 2nd expansion valve 4, and the 1st heat exchanger 1. The medium exiting the first heat exchanger 1 flows to the third port 43 and the second port 42 of the four-way valve and is supplied (circulated) to the inlet side of the compression means 5.

  Since the first expansion valve 3 and the second expansion valve 4 are operated in the throttle state, a high-temperature compression medium is supplied to the third heat exchanger 7, and the third heat exchanger 7 is a condenser. 1 The heat exchanger 1 is supplied with a low-temperature medium to serve as an evaporator. The high-temperature and high-pressure compression medium from the compression means 5 is condensed in the third heat exchanger 7, and the outside air OA1 absorbs the heat of condensation and is discharged as exhaust EA1 (condensation heat is released).

  The medium exiting the third heat exchanger 7 is decompressed by the first expansion valve 3 to become a low-temperature / low-pressure medium, and is sent to the second heat exchanger 2.

  The return air RA2 in the room is adsorbed by the desiccant material of the second heat exchanger 2 and is blown into the room (dehumidified air) as dry air (SA2). The second heat exchanger 2 medium evaporates due to adsorption heat accompanying dehumidification, and is further depressurized by the second expansion valve 4 to be sent to the first heat exchanger 1 as a low temperature / low pressure medium. The indoor return air RA1 is cooled by the first heat exchanger 1 and blown into the room (cooling air) (SA1). The medium is sent to the inlet side of the compression means 5 as superheated gas.

  In the state shown in FIG. 3A, as shown in FIG. 4A, the first opening 25 of the case 14 and the third opening 27 of the case 15 are closed by the closing operation of the first damper 35 and the third damper 37. Is closed. With the opening operation of the communication damper 38 and the second damper 36, the communication opening 28 of the partition wall 16 and the second opening 26 of the case 15 are opened.

  Thereby, the indoor return air RA1 is sucked from the return air suction port 21, and the blower SA 1 is blown out from the blower port 22 through the first heat exchanger 1. The return air RA2 is sent from the communication opening 28 to the second heat exchanger 2, the moisture is adsorbed by the desiccant material, becomes dry air, and blown air SA2 is blown out from the second opening 26.

  While the second heat exchanger 2 dehumidifies the return air RA, the desiccant material itself absorbs moisture, so that the desiccant material becomes saturated as the dehumidification continues. For this reason, it shifts to the operation mode (cooling / desorption operation mode) which exhales (desorbs) moisture.

  An operation mode (cooling / desorption operation mode) at the time of cooling accompanied by desorption of moisture will be described based on FIGS. 3 (b) and 4 (b).

  As shown in FIG. 3 (b), the compression medium compressed by the compression means 5 flows from the first port 41 of the four-way valve to the fourth port 44, and the third heat exchanger 7, the first expansion valve 3, It sends in order of the 2nd heat exchanger 2, the 2nd expansion valve 4, and the 1st heat exchanger 1. The medium exiting the first heat exchanger 1 flows to the third port 43 and the second port 42 of the four-way valve and is supplied (circulated) to the inlet side of the compression means 5.

  Since the first expansion valve 3 is operated in the open state and the second expansion valve 4 is operated in the throttle state, a high-temperature compression medium is supplied to the third heat exchanger 7, and the third heat exchanger 7 The first heat exchanger 1 is supplied with a low temperature medium to be an evaporator. The high-temperature and high-pressure compression medium from the compression means 5 is partially condensed in the third heat exchanger 7, and the outside air OA1 absorbs the heat of condensation and is discharged as exhaust EA1 (condensation heat is released).

  Depending on the operating conditions, the high-temperature and high-pressure compression medium from the compression means 5 may pass through the third heat exchanger 7 as it is. In this case, the outside air OA1 is not introduced, so the third heat exchanger 7 It can be omitted. By providing the third heat exchanger 7, it is possible to control the condensation state and adjust the temperature of the medium accompanying the condensation.

  The medium exiting the third heat exchanger 7 is not decompressed by the first expansion valve 3 but is sent to the second heat exchanger 2 as a high-temperature / high-pressure medium, and is condensed until it is supercooled. In the second heat exchanger 2, the adsorbed moisture is desorbed by the heat of condensation of the refrigerant.

  The outside air OA2 absorbs moisture desorbed through the second heat exchanger 2, and is discharged as exhaust EA2 in a high temperature / high humidity state. The refrigerant that has exited the second heat exchanger 2 is reduced in pressure by the second expansion valve 4 and is sent to the first heat exchanger 1 as a low-temperature and low-humidity medium. The indoor return air RA1 is cooled by the first heat exchanger 1 and blown into the room (cooling air) (SA1). The medium is evaporated and sent to the inlet side of the compression means 5.

  In the state shown in FIG. 3B, as shown in FIG. 4B, the second opening 26 of the case 15 is closed by the closing operation of the second damper 36, and the partition wall 16 is closed by the closing operation of the communication damper 38. The communication opening 28 is closed. By the opening operation of the first damper 35 and the third damper 37, the first opening 25 of the case 14 and the third opening 27 of the case 15 are opened.

  Thereby, the indoor return air RA1 is sucked from the return air suction port 21, and the blower SA 1 is blown out from the blower port 22 through the first heat exchanger 1. Outside air OA2 flows in from the first opening 25, is sent to the second heat exchanger 2, absorbs moisture, and is discharged from the third opening 27 as exhaust EA2.

  When the moisture of the second heat exchanger 2 is desorbed (regenerated) in the cooling / desorption operation mode, the cooling / dehumidification operation mode and the cooling / desorption operation are switched to the cooling / dehumidification operation mode as necessary. The mode is repeated. Switching between the cooling / dehumidifying operation mode and the cooling / desorption operation mode can be performed by a threshold based on temperature information and absolute humidity information, for example.

  Thereby, the cooling / dehumidifying operation mode and the cooling / desorption operation mode are repeated, and the first heat exchanger 1 is used as an evaporator (control of sensible heat), and the second heat exchanger 2 performs dehumidification and regeneration (control of latent heat). ), The latent sensible heat of the fluid to be heat-exchanged can be individually controlled. Therefore, the temperature and humidity can be adjusted, and the heat pump can be efficiently operated with a simple device configuration during the cooling operation.

  An operation mode (heating / humidification operation mode) during heating with humidification will be described with reference to FIGS. 5 (a) and 6 (a).

  As shown in FIG. 5 (a), the compression medium compressed by the compression means 5 flows from the first port 41 of the four-way valve to the third port 43, and the first heat exchanger 1, the second expansion valve 4, It sends in order of the 2nd heat exchanger 2, the 1st expansion valve 3, and the 3rd heat exchanger 7. The medium exiting the third heat exchanger 7 flows to the fourth port 44 and the second port 42 of the four-way valve and is supplied (circulated) to the inlet side of the compression means 5.

  Since the first expansion valve 3 is operated in the throttle state and the second expansion valve 4 is operated in the open state, a high-temperature compression medium is supplied to the first heat exchanger 1 and the second heat exchanger 2. The first heat exchanger 1 and the second heat exchanger 2 are condensers, and the decompressed medium is supplied to the third heat exchanger 7, and the third heat exchanger 7 is an evaporator.

  The medium compressed by the compression means 5 is condensed by the first heat exchanger 1. The indoor return air RA1 is heated in the first heat exchanger 1 by the heat of condensation and blown (heated) (SA1). The medium leaving the first heat exchanger 1 passes through the second expansion valve 4 and is sent to the second heat exchanger 2, where it is condensed to a supercooled state, and the indoor return air RA2 is humidified by the condensation heat. . That is, the moisture desorbed by the second heat exchanger 2 is absorbed and humidified and blown (humidified and blown) (SA2). That is, the sensible heat and latent heat of the return air RA in the room are individually processed.

  The medium exiting the second heat exchanger 2 is depressurized by the first expansion valve 3, sent to the third heat exchanger 7, and circulated to the compression means 5. In the third heat exchanger 7, the medium is evaporated by taking heat from the outside air OA1, and the outside air OA1 is discharged as the exhaust EA1.

  In the state shown in FIG. 5A, the first opening 25 of the case 14 and the third opening 27 of the case 15 are closed by the closing operation of the first damper 35 and the third damper 37, as shown in FIG. 6A. Is closed. With the opening operation of the communication damper 38 and the second damper 36, the communication opening 28 of the partition wall 16 and the second opening 26 of the case 15 are opened.

  As a result, the indoor return air RA1 is sucked from the return air suction port 21 and blown air (heating air) SA1 is blown out from the blower port 22 through the first heat exchanger 1. The return air RA2 is sent to the second heat exchanger 2 from the communication opening 28, moisture is absorbed from the desiccant material, becomes humidified air, and air (humidification / air blowing) SA2 is blown out from the second opening 26.

  While the second heat exchanger 2 humidifies the return air RA2, moisture is released from the desiccant material. Therefore, it is necessary to supplement the desiccant material with moisture as the humidification continues. For this reason, it shifts to the operation mode (heating / adsorption operation mode) which replenishes moisture.

  An operation mode (heating / adsorption operation mode) at the time of heating with water replenishment will be described with reference to FIGS. 5 (b) and 6 (b).

  As shown in FIG. 5 (b), the compression medium compressed by the compression means 5 flows from the first port 41 of the four-way valve to the third port 43, and the first heat exchanger 1, the second expansion valve 4, It sends in order of the 2nd heat exchanger 2, the 1st expansion valve 3, and the 3rd heat exchanger 7. The medium exiting the third heat exchanger 7 flows to the fourth port 44 and the second port 42 of the four-way valve and is supplied (circulated) to the inlet side of the compression means 5.

  Since the first expansion valve 3 and the second expansion valve 4 are operated in the throttle state, a high-temperature compression medium is supplied to the first heat exchanger 1, and the first heat exchanger 1 is a condenser. The second heat exchanger 2 and the third heat exchanger 7 are supplied with a decompressed medium so that the second heat exchanger 2 and the third heat exchanger 7 are evaporators.

  The medium compressed by the compression means 5 is condensed by the first heat exchanger 1. The indoor return air RA1 is heated in the first heat exchanger 1 by the heat of condensation and blown (heated) (SA1). The medium exiting the first heat exchanger 1 is decompressed by the second expansion valve 4 to be a low-temperature and low-pressure medium, and is sent to the second heat exchanger 2. The outside air OA2 passes through the second heat exchanger 2, moisture in the air is adsorbed by the desiccant material, becomes low-temperature, low-humidity air, and is discharged as exhaust EA2.

  The medium sent to the second heat exchanger 2 evaporates due to the heat of adsorption, further reduced in pressure by the first expansion valve 3, sent to the third heat exchanger 7, and circulated to the compression means 5. In the third heat exchanger 7, the medium is evaporated by taking heat from the outside air OA1, and the outside air OA1 is discharged as the exhaust EA1.

  In the state shown in FIG. 5B, as shown in FIG. 6B, the second opening 26 of the case 15 is closed by the closing operation of the second damper 36, and the partition wall 16 is closed by the closing operation of the communication damper 38. The communication opening 28 is closed. By the opening operation of the first damper 35 and the third damper 37, the first opening 25 of the case 14 and the third opening 27 of the case 15 are opened.

  As a result, the indoor return air RA1 is sucked from the return air suction port 21 and blown air (heating air) SA1 is blown out from the blower port 22 through the first heat exchanger 1. Outside air OA2 flows in from the first opening 25, is sent to the second heat exchanger 2, is adsorbed by the desiccant material, and is discharged from the third opening 27 as exhaust EA2.

  When moisture is replenished to the second heat exchanger 2 in the heating / adsorption operation mode, the mode shifts to the heating / humidification operation mode as necessary.

  Thus, the heating / humidification operation mode and the heating / adsorption operation mode are repeated, the first heat exchanger 1 is used as a condenser (control of sensible heat), and the second heat exchanger 2 humidifies and replenishes moisture (latent heat). Control), the latent sensible heat of the fluid to be heat-exchanged can be individually controlled. Accordingly, the temperature and humidity can be adjusted, and the heat pump can be efficiently operated with a simple device configuration during the heating operation.

  The above-described air conditioning system controls the flow direction of the medium, the operation of the expansion valve in the open state and the throttle state, and individually controls the latent sensible heat in the heat exchanger, thereby minimizing the heat exchanger. Can be used to adjust the temperature and humidity, and the heat pump can be operated efficiently with a simple device configuration.

  INDUSTRIAL APPLICABILITY The present invention can be used in the industrial field of air conditioning systems that adjust temperature and humidity using a desiccant heat exchanger and a heat pump system.

DESCRIPTION OF SYMBOLS 1 1st heat exchanger 2 2nd heat exchanger 3 1st expansion valve 4 2nd expansion valve 5 Compression means 6 Path switching means 7 3rd heat exchanger 9 Control means 11 Casing 12, 13, 14, 15 Case 16 Partition Wall 21 Return air inlet 22 Air outlet 25 1st opening 26 2nd opening 27 3rd opening 28 Communication opening 31, 32 Fan 33 Temperature sensor 34 Humidity sensor 35 1st damper 36 2nd damper 37 3rd damper 38 Communication damper 40 4-way valve 41 1st port 42 2nd port 43 3rd port 44 4th port

Claims (7)

A first heat exchanger in which the medium flows through the heat transfer tubes;
A second heat exchanger in which a desiccant material is applied to the outside of the heat transfer tube through which the medium flows;
A first expansion valve provided in a path of the medium on one side of the second heat exchanger, the operation of which is controlled in an open state and a throttle state;
A second expansion valve provided in the path of the medium on the other side of the second heat exchanger, the operation of which is controlled in an open state and a throttle state;
Compression means for compressing the medium;
Path switching means for switching supply of the compressed medium, which is a medium compressed by the compressing means, to the first heat exchanger or the first expansion valve;
The second expansion valve is connected to one side of the first heat exchanger;
The path switching means is connected to the other side of the first heat exchanger, and the path switching means is connected to the first expansion valve,
The air-conditioning system, wherein the fluid subjected to heat exchange in at least one of the first heat exchanger and the second heat exchanger is blown to an air-conditioned part. The air conditioning system according to claim 1,
At least one of operation mode instruction information, information on the humidity of the fluid blown to the air-conditioned part, information on the temperature of the fluid blown to the air-conditioned part, and information on the operation time of the operation mode is input and input An air conditioning system comprising: control means for controlling operations of the path switching means, the first expansion valve, and the second expansion valve based on the information obtained. The air conditioning system according to claim 2,
The operation mode is:
A cooling / dehumidifying operation mode in which the first heat exchanger that is an evaporator, the second heat exchanger that adsorbs moisture to the desiccant material, and the return air of the air-conditioned part are circulated;
A cooling operation mode for circulating the return air of the air-conditioned part to the first heat exchanger as an evaporator;
Heating / humidifying operation mode for circulating the return air of the air-conditioned part to the first heat exchanger that is a condenser, the second heat exchanger that desorbs moisture from the desiccant material,
An air-conditioning system comprising: a heating operation mode in which return air from the air-conditioned part is circulated in the first heat exchanger that is a condenser. In the air conditioning system according to claim 3,
In the cooling operation mode,
In the second heat exchanger for desorbing moisture from the desiccant material, the outside air is circulated and the moisture is discharged as a gas.
In the heating operation mode,
An air conditioning system characterized by replenishing moisture by circulating outside air through the second heat exchanger that adsorbs moisture to the desiccant material. The air conditioning system according to claim 4,
The control means includes
When the cooling / dehumidifying operation mode is selected,
Operating the path switching means to send the compression medium in the order of the first expansion valve, the second heat exchanger, the second expansion valve, and the first heat exchanger, and the first expansion valve; , Operating the second expansion valve in the throttle state,
When the cooling operation mode is selected,
The path switching means is operated so as to send the compression medium in the order of the first expansion valve, the second heat exchanger, the second expansion valve, and the first heat exchanger, and the first expansion valve is opened. Operating the second expansion valve to the throttle state,
When the heating / humidifying operation mode is selected,
The path switching means is operated to send the compression medium in the order of the first heat exchanger, the second expansion valve, the second heat exchanger, and the first expansion valve, and the first expansion valve is throttled Operating to a state, operating the second expansion valve to an open state,
When the heating operation mode is selected,
Operating the path switching means to send the compression medium in the order of the first heat exchanger, the second expansion valve, the second heat exchanger, the first expansion valve, and the first expansion valve; And operating the second expansion valve in a throttle state. In the air conditioning system according to any one of claims 1 to 5,
An air conditioning system comprising temperature adjusting means for adjusting the temperature of the medium between the path switching means and the first expansion valve. The air conditioning system according to claim 6,
The temperature adjusting means is
An air conditioning system, wherein the air conditioning system is a third heat exchanger disposed between the path switching means and the first expansion valve.

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