JP2010002118A - Air conditioning system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air conditioning system reducing running cost for adjusting temperature and humidity of a glass house space. <P>SOLUTION: This air conditioning system 10 includes an utilization unit 3, a heat source unit 2, an air introducing means D1, a temperature detecting means Se1, a humidity detecting means Se2, and a control section 7. The air introducing means switches a first introduction state of introducing the air exchanging heat by a heat source-side heat exchanger, to an air-conditioned space, and a first non-introducing state not introducing the air exchanging heat by the heat source-side heat exchanger to the air-conditioned space. The temperature detecting means detects the temperature in the air-conditioned space as a space temperature. The humidity detecting means detects the humidity in the air-conditioned space as a space humidity. The control section performs temperature/humidity control for controlling the utilization unit, the heat source unit and the air introducing means on the basis of the space temperature, the space humidity, a target temperature and a target humidity. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an air conditioning system for adjusting temperature and humidity in a greenhouse space for horticulture such as a vinyl house.

When adjusting the temperature and humidity of the greenhouse space such as the inside of a vinyl house where horticultural plants are cultivated, the humidity of the greenhouse space is always high throughout the year. It is necessary to dehumidify (dehumidify) while performing heating operation in winter. In such a case, conventionally, an air conditioner (cooling dehumidifier) is used as the cooling means, and a hot air heater using a burner or the like that requires fuel such as heavy oil is used as the heating means. (See Patent Document 1). In the technique of Patent Document 1, a cooling dehumidifier (so-called cooling operation of an air conditioner) is used for cooling and dehumidification, and as a result, the temperature is raised by a hot air heater for heating and dehumidification. The technique of lowering is used. Moreover, as heating dehumidification, a warm air heater like patent document 1 and a dehumidifier may be used together.
JP-A-8-308395

  However, when a hot air heater such as Patent Document 1 is used for heating and dehumidification, fuel is required, and thus there is a problem that a running cost is increased due to a tendency of increasing fuel costs in recent years.

  The subject of this invention is providing the air conditioning system which can reduce the running cost concerning the temperature / humidity adjustment of greenhouse space.

  The air conditioning system according to the first aspect of the present invention includes a utilization unit, a heat source unit, air introduction means, temperature detection means, humidity detection means, and a control unit. The usage unit is disposed in the air-conditioning target space and has a usage-side heat exchanger. The heat source unit has a heat source side heat exchanger. The air introduction means switches between the first introduction state and the first non-introduction state. The first introduction state is a state in which air heat-exchanged to the heat source side heat exchanger is introduced into the air-conditioning target space. The first non-introduction state is a state in which the air heat-exchanged to the heat source side heat exchanger is not introduced into the air-conditioning target space. The temperature detecting means detects the temperature in the air conditioning target space as the space temperature. The humidity detecting means detects the humidity in the air-conditioning target space as the spatial humidity. The control unit performs temperature / humidity control for controlling the use unit, the heat source unit, and the air introduction unit so that the space temperature approaches the target temperature and the space humidity approaches the target humidity.

  In the present invention, the control unit controls the utilization unit, the heat source unit, and the air introduction unit so that the space temperature approaches the target temperature and the space humidity approaches the target humidity. For example, in the heating operation state, when the air introduction unit is in the first introduction state, the air in the air-conditioning target space is guided to the heat source side heat exchanger, and the heat-exchanged air is sent to the air-conditioning target space. it can. In this case, since the heat source side heat exchanger functions as a heat absorber (evaporator), the air introduced from the air-conditioning target space can be dehumidified. Therefore, in such a case, the air in the air-conditioning target space can be dehumidified while performing the heating operation. Thereby, even if it does not utilize the apparatus which requires fuel, heating dehumidification can be performed only by utilizing the air conditioning apparatus containing a utilization unit and a heat-source unit. For this reason, the running cost concerning fuel can be reduced and energy consumption can be reduced.

  An air conditioning system according to a second aspect of the present invention is the air conditioning system according to the first aspect of the present invention, further comprising outside air introduction means. The outside air introduction means switches between the second introduction state and the second non-introduction state. The second introduction state is a state in which outside air is introduced into the heat source side heat exchanger. The second non-introduction state is a state in which outside air is not introduced into the heat source side heat exchanger. And a control part further controls an external air introduction means in the case of temperature / humidity control.

  In the present invention, the outside air can be introduced into or shut off from the heat source side heat exchanger by the outside air introduction means being controlled by the control unit. For this reason, when it is desired to exchange heat between the heat source side heat exchanger and the outside air, the control unit can control the outside air introducing means to absorb heat from the outside air or to release heat to the outside air.

  An air conditioning system according to a third aspect of the present invention is the air conditioning system according to the second aspect of the present invention, wherein the control unit uses the use side heat exchanger as a radiator and the heat source side heat exchanger as a heat sink in winter. When the spatial humidity is lower than the target humidity while performing the heating operation to function, the air introduction means is switched to the first non-introduction state and the outside air introduction means is switched to the second introduction state, and the spatial humidity is lower than the target humidity. When the temperature is high, control for switching the air introduction means to the first introduction state and the outside air introduction means to the second non-introduction state is performed as temperature and humidity control.

  In the present invention, in the winter season, when the space-side humidity becomes higher than the target humidity while the heating-side operation of the air-conditioning target space is performed by causing the use-side heat exchanger to function as a radiator, the air introduction means is in the first introduction state. Thus, the air in the air-conditioning target space is dehumidified by sending air in the air-conditioning target space to the heat source side heat exchanger functioning as a heat absorber (evaporator) to exchange heat.

  Therefore, heating and dehumidification can be realized only with an air conditioner configured by a heat source unit and a utilization unit without using a device that requires fuel. Thereby, the running cost concerning fuel can be reduced and energy consumption can be reduced.

  An air conditioning system according to a fourth aspect of the present invention is the air conditioning system according to the second aspect or the third aspect of the present invention, wherein the control unit uses the use side heat exchanger as the heat sink and the heat source side heat exchanger in summer. Control for switching the outside air introduction means to the second introduction state is performed as temperature / humidity control while performing the cooling operation that functions as a condenser.

  In the present invention, in the summer season, the use side heat exchanger functions as a heat absorber (evaporator) to perform the cooling operation of the air-conditioning target space. Thus, in order to make the use side heat exchanger function as a heat sink, the dehumidifying operation is performed by the use side heat exchanger, and only the air conditioner configured by the heat source unit and the use unit is used for cooling and dehumidification. Can be realized.

  An air conditioning system according to a fifth aspect of the present invention is the air conditioning system according to any of the second to fourth aspects of the present invention, wherein the control unit uses the use side heat exchanger as a radiator and the heat source side heat exchanger. The air introduction means is in the first non-introduction state when the heating operation that functions as a heat absorber is performed in an intermediate period that is a period other than winter and summer and the humidity of the air-conditioning target space is lower than the target humidity In addition, when the outside air introduction means is switched to the second introduction state and the heating operation is performed in the intermediate period and the humidity of the air-conditioning target space is higher than the target humidity, the air introduction means is in the first introduction state. In addition, control for switching the outside air introduction means to the second non-introduction state is performed as temperature and humidity control.

  In the present invention, when the heating operation is performed in the intermediate period and the spatial humidity becomes higher than the target humidity, the air introduction means is set to the first introduction state to function as a heat absorber (evaporator). The air in the air-conditioning target space is dehumidified by sending air in the air-conditioning target space to the existing heat source side heat exchanger and causing heat exchange.

  Therefore, heating and dehumidification can be realized only with an air conditioner configured by a heat source unit and a utilization unit without using a device that requires fuel. Thereby, the running cost concerning fuel can be reduced and energy consumption can be reduced.

  An air conditioning system according to a sixth aspect of the present invention is the air conditioning system according to any of the second to fifth aspects of the present invention, wherein the heat source unit is disposed in a predetermined space different from the air-conditioning target space. The air introduction means can introduce air, which is heat-exchanged by the heat-source-side heat exchanger and accumulated in a predetermined space, into the air-conditioning target space. The outside air introducing means can introduce outside air into the predetermined space.

  In the present invention, for example, when the air introduction unit is in the first introduction state in the heating operation state, the air in the air-conditioning target space is guided to the predetermined space, and heat is exchanged by the heat source side heat exchanger in the predetermined space. The sent air can be sent to the air conditioning target space. In this case, since the heat source side heat exchanger functions as a heat absorber (evaporator), the air introduced from the air-conditioning target space can be dehumidified. Therefore, in such a case, the air in the air-conditioning target space can be dehumidified while performing the heating operation. Thereby, even if it does not utilize the apparatus which requires fuel, heating dehumidification can be performed only by utilizing the air conditioning apparatus containing a utilization unit and a heat-source unit. For this reason, the running cost concerning fuel can be reduced and energy consumption can be reduced.

  An air conditioning system according to a seventh aspect is the air conditioning system according to the sixth aspect, wherein the air introducing means is provided between the air conditioning target space and the predetermined space, and between the air conditioning target space and the predetermined space. It is an air introduction damper that can communicate or shut off.

  In the present invention, for example, in the heating operation state, when the air introduction means is in the first introduction state (the air introduction damper is in the open state), the air that has been heat-exchanged through the heat source side heat exchanger is air-conditioned. Can be sent to the target space. In this case, since the heat source side heat exchanger functions as a heat absorber (evaporator), the air introduced from the air-conditioning target space can be dehumidified. Therefore, in such a case, the air in the air-conditioning target space can be dehumidified while performing the heating operation. Thereby, even if it does not utilize the apparatus which requires fuel, heating dehumidification can be performed only by utilizing the air conditioning apparatus containing a utilization unit and a heat-source unit. For this reason, the running cost concerning fuel can be reduced and energy consumption can be reduced.

  An air conditioning system according to an eighth aspect is the air conditioning system according to the sixth aspect or the seventh aspect, wherein the outside air introducing means is provided between the external space and the predetermined space, This is an outside air introduction damper that can communicate or block between the two.

  In the present invention, the outside air can be introduced into or shut off from the predetermined space by controlling the outside air introduction damper as the outside air introduction means. That is, by opening the outside air introduction damper, outside air can be introduced into the predetermined space, and heat energy of the outside air can be taken in or released from the outside air.

  An air conditioning system according to a ninth aspect of the present invention is the air conditioning system according to any of the second to fifth aspects of the present invention, wherein the heat source unit is disposed in an external space outside the air conditioning target space. The air introduction means includes a first air passage, a second air passage, a first damper, and a second damper. The first air path can introduce the air heat-exchanged by the heat source side heat exchanger into the air-conditioning target space. The second air passage can introduce air inside the air-conditioning target space into the heat source side heat exchanger. The first damper can open and close the first air passage. The second damper can open and close the second air passage. The outside air introducing means has a first outside air damper and a second outside air damper. The first outside air damper can introduce outside air into the heat source side heat exchanger. The second outside air damper can discharge the air heat-exchanged by the heat source side heat exchanger to the external space.

  In the present invention, for example, in the heating operation state, when the air introduction means is in the first introduction state (for example, the first damper and the second damper are in the open state), the heat is introduced to the heat source side heat exchanger and heated. The exchanged air can be sent to the air-conditioned space. In this case, since the heat source side heat exchanger functions as a heat absorber (evaporator), the air introduced from the air-conditioning target space can be dehumidified. Therefore, in such a case, the air in the air-conditioning target space can be dehumidified while performing the heating operation. Thereby, even if it does not utilize the apparatus which requires fuel, heating dehumidification can be performed only by utilizing the air conditioning apparatus containing a utilization unit and a heat-source unit. For this reason, the running cost concerning fuel can be reduced and energy consumption can be reduced.

  An air conditioning system according to a tenth aspect of the present invention is the air conditioning system according to the ninth aspect of the present invention, wherein the air introduction means opens the first damper and the second damper as the first introduction state, and sets the first non-introduction state as the first non-introduction state. The first damper and the second damper are closed. The outside air introduction means opens the outside air damper as the second introduction state, and closes the outside air damper as the second non-introduction state.

  In the present invention, for example, in the heating operation state, when the first damper and the second damper are in the open state, the heat exchanged air that is led to the heat source side heat exchanger is sent to the air conditioning target space. it can. In this case, since the heat source side heat exchanger functions as a heat absorber (evaporator), the air introduced from the air-conditioning target space can be dehumidified. Therefore, in such a case, the air in the air-conditioning target space can be dehumidified while performing the heating operation. Thereby, even if it does not utilize the apparatus which requires fuel, heating dehumidification can be performed only by utilizing the air conditioning apparatus containing a utilization unit and a heat-source unit. For this reason, the running cost concerning fuel can be reduced and energy consumption can be reduced.

  An air conditioning system according to an eleventh aspect of the present invention is the air conditioning system according to any of the second to fifth aspects of the present invention, wherein the heat source unit is disposed in the air conditioning target space. The air introduction means has a first damper and a second damper. The first damper can introduce the air heat-exchanged by the heat source side heat exchanger into the air-conditioning target space. The second damper can introduce the air in the air-conditioning target space into the heat source side heat exchanger. The outside air introducing means has a first outside air damper and a second outside air damper. The first outside air damper can introduce outside air into the heat source side heat exchanger. The second outside air damper can discharge the air heat-exchanged by the heat source side heat exchanger to the external space.

  In the present invention, for example, in the heating operation state, when the air introduction means is in the first introduction state (for example, the first damper and the second damper are in the open state), the heat is introduced to the heat source side heat exchanger and heated. The exchanged air can be sent to the air-conditioned space. In this case, since the heat source side heat exchanger functions as a heat absorber (evaporator), the air introduced from the air-conditioning target space can be dehumidified. Therefore, in such a case, the air in the air-conditioning target space can be dehumidified while performing the heating operation. Thereby, even if it does not utilize the apparatus which requires fuel, heating dehumidification can be performed only by utilizing the air conditioning apparatus containing a utilization unit and a heat-source unit. For this reason, the running cost concerning fuel can be reduced and energy consumption can be reduced.

  An air conditioning system according to a twelfth aspect of the present invention is the air conditioning system according to the eleventh aspect of the present invention, wherein the air introduction means opens the first damper and the second damper as the first introduction state, and sets the first non-introduction state as the first non-introduction state. The first damper and the second damper are closed. The outside air introduction means opens the outside air damper as the second introduction state, and closes the outside air damper as the second non-introduction state.

  In the present invention, for example, in the heating operation state, when the first damper and the second damper are in the open state, the heat exchanged air that is led to the heat source side heat exchanger is sent to the air conditioning target space. it can. In this case, since the heat source side heat exchanger functions as a heat absorber (evaporator), the air introduced from the air-conditioning target space can be dehumidified. Therefore, in such a case, the air in the air-conditioning target space can be dehumidified while performing the heating operation. Thereby, even if it does not utilize the apparatus which requires fuel, heating dehumidification can be performed only by utilizing the air conditioning apparatus containing a utilization unit and a heat-source unit. For this reason, the running cost concerning fuel can be reduced and energy consumption can be reduced.

  In the air conditioning system according to the first aspect of the invention, the air in the air-conditioned space can be dehumidified while performing the heating operation. Thereby, even if it does not utilize the apparatus which requires fuel, heating dehumidification can be performed only by utilizing the air conditioning apparatus containing a utilization unit and a heat-source unit. For this reason, the running cost concerning fuel can be reduced and energy consumption can be reduced.

  In the air conditioning system according to the second aspect of the invention, the control unit controls the outside air introduction means, whereby outside air can be introduced into or shut off from the heat source side heat exchanger. For this reason, when it is desired to exchange heat between the heat source side heat exchanger and the outside air, the control unit can control the outside air introducing means to absorb heat from the outside air or to release heat to the outside air.

  In the air conditioning system which concerns on 3rd invention, heating dehumidification is realizable only with the air conditioning apparatus comprised by a heat-source unit and a utilization unit. Thereby, the running cost concerning fuel can be reduced and energy consumption can be reduced.

  In the air conditioning system according to the fourth aspect of the invention, in order to make the use side heat exchanger function as a heat absorber, the dehumidifying operation is performed by the use side heat exchanger, and the air constituted by the heat source unit and the use unit. Heating dehumidification can be achieved with only the harmony device.

  In the air conditioning system according to the fifth aspect of the present invention, heating and dehumidification can be realized only with an air conditioning apparatus constituted by a heat source unit and a utilization unit, without using equipment that requires fuel. Thereby, the running cost concerning fuel can be reduced and energy consumption can be reduced.

  In the air conditioning system according to the sixth aspect of the present invention, for example, in the heating operation state, when the air introduction means is in the first introduction state, the air in the air-conditioning target space is guided to the predetermined space and the heat source side in the predetermined space The air heat-exchanged by the heat exchanger can be sent to the air-conditioning target space. In this case, since the heat source side heat exchanger functions as a heat absorber (evaporator), the air introduced from the air-conditioning target space can be dehumidified. Therefore, in such a case, the air in the air-conditioning target space can be dehumidified while performing the heating operation. Thereby, even if it does not utilize the apparatus which requires fuel, heating dehumidification can be performed only by utilizing the air conditioning apparatus containing a utilization unit and a heat-source unit. For this reason, the running cost concerning fuel can be reduced and energy consumption can be reduced.

  In the air conditioning system according to the seventh aspect of the present invention, for example, in the heating operation state, when the air introduction means is in the first introduction state (the air introduction damper is in the open state), the heat is introduced to the heat source side heat exchanger. The exchanged air can be sent to the air-conditioned space. In this case, since the heat source side heat exchanger functions as a heat absorber (evaporator), the air introduced from the air-conditioning target space can be dehumidified. Therefore, in such a case, the air in the air-conditioning target space can be dehumidified while performing the heating operation. Thereby, even if it does not utilize the apparatus which requires fuel, heating dehumidification can be performed only by utilizing the air conditioning apparatus containing a utilization unit and a heat-source unit. For this reason, the running cost concerning fuel can be reduced and energy consumption can be reduced.

  In the air conditioning system according to the eighth aspect of the present invention, the outside air can be introduced into or shut off from the predetermined space by controlling the outside air introduction damper as the outside air introduction means. That is, by opening the outside air introduction damper, outside air can be introduced into the predetermined space, and heat energy of the outside air can be taken in or released from the outside air.

  In the air conditioning system according to the ninth aspect of the present invention, for example, in the heating operation state, when the air introduction means is in the first introduction state (for example, the first damper and the second damper are in the open state), the heat source side heat Air that has been guided to the exchanger and subjected to heat exchange can be sent to the air-conditioning target space. In this case, since the heat source side heat exchanger functions as a heat absorber (evaporator), the air introduced from the air-conditioning target space can be dehumidified. Therefore, in such a case, the air in the air-conditioning target space can be dehumidified while performing the heating operation. Thereby, even if it does not utilize the apparatus which requires fuel, heating dehumidification can be performed only by utilizing the air conditioning apparatus containing a utilization unit and a heat-source unit. For this reason, the running cost concerning fuel can be reduced and energy consumption can be reduced.

  In the air conditioning system according to the tenth aspect of the invention, for example, in the heating operation state, when the first damper and the second damper are in the open state, the air that has been heat-exchanged by being led to the heat source side heat exchanger is air-conditioned. Can be sent to the target space. In this case, since the heat source side heat exchanger functions as a heat absorber (evaporator), the air introduced from the air-conditioning target space can be dehumidified. Therefore, in such a case, the air in the air-conditioning target space can be dehumidified while performing the heating operation. Thereby, even if it does not utilize the apparatus which requires fuel, heating dehumidification can be performed only by utilizing the air conditioning apparatus containing a utilization unit and a heat-source unit. For this reason, the running cost concerning fuel can be reduced and energy consumption can be reduced.

  In the air conditioning system according to the eleventh aspect of the invention, for example, in the heating operation state, when the air introduction means is in the first introduction state (for example, the first damper and the second damper are in the open state), the heat source side heat Air that has been guided to the exchanger and subjected to heat exchange can be sent to the air-conditioning target space. In this case, since the heat source side heat exchanger functions as a heat absorber (evaporator), the air introduced from the air-conditioning target space can be dehumidified. Therefore, in such a case, the air in the air-conditioning target space can be dehumidified while performing the heating operation. Thereby, even if it does not utilize the apparatus which requires fuel, heating dehumidification can be performed only by utilizing the air conditioning apparatus containing a utilization unit and a heat-source unit. For this reason, the running cost concerning fuel can be reduced and energy consumption can be reduced.

  In the air conditioning system according to the twelfth aspect of the invention, for example, when the first damper and the second damper are in the open state in the heating operation state, the air that has been heat-exchanged by being led to the heat source side heat exchanger is air-conditioned. Can be sent to the target space. In this case, since the heat source side heat exchanger functions as a heat absorber (evaporator), the air introduced from the air-conditioning target space can be dehumidified. Therefore, in such a case, the air in the air-conditioning target space can be dehumidified while performing the heating operation. Thereby, even if it does not utilize the apparatus which requires fuel, heating dehumidification can be performed only by utilizing the air conditioning apparatus containing a utilization unit and a heat-source unit. For this reason, the running cost concerning fuel can be reduced and energy consumption can be reduced.

<Configuration of air conditioning system>
An air conditioning system 10 according to the present embodiment is disposed in a greenhouse space Z1 as an air conditioning target space for horticultural use such as a vinyl house 8, and mainly includes an air conditioner 1 and a house bypass damper as an air introduction unit. D1 and an outside air release damper D2 as outside air introduction means. FIG. 1 is a schematic configuration diagram of an air conditioning system 10 according to the present embodiment.

  The air conditioner 1 has an outdoor unit 2 as a heat source unit and an indoor unit 3 as a utilization unit. In this embodiment, the outdoor unit 2 is provided in a dehumidifying space Z2 adjacent to the greenhouse space Z1 (ie, The vinyl house 8 has a greenhouse space Z1 and a dehumidifying space Z2, and an indoor unit 3 is provided in the greenhouse space Z1. The outdoor unit 2 and the indoor unit 3 are connected by a refrigerant communication pipe 9 to form a refrigerant circuit 5.

  FIG. 2 is a schematic diagram of the refrigerant circuit 5 of the air conditioner 1. The refrigerant circuit 5 is a circuit in which a compressor 21, a four-way switching valve 22, an outdoor heat exchanger 23 as a heat source side heat exchanger 23, an expansion valve 24, and an indoor heat exchanger 31 are connected by a refrigerant pipe 4. Among the devices 21, 22, 23, 24, and 31 constituting the refrigerant circuit 5, the compressor 21, the four-way switching valve 22, the outdoor heat exchanger 23, and the expansion valve 24 are provided in the outdoor unit 2, and the indoor heat An exchanger 31 is provided in the indoor unit 3. In FIG. 2, solid and broken arrows indicate the flow direction of the refrigerant.

  The compressor 21 is a compressor whose operating capacity can be varied. In this embodiment, the compressor 21 is a positive displacement compressor driven by a motor (not shown) whose rotation speed is controlled by an inverter.

  The four-way switching valve 22 is a valve for switching the flow direction of the refrigerant. During the cooling operation, the outdoor heat exchanger 23 is used as a refrigerant condenser compressed by the compressor 21 and the indoor heat exchanger 31. To function as an evaporator for the refrigerant condensed in the outdoor heat exchanger 23, the discharge side of the compressor 21 and the gas side of the outdoor heat exchanger 23 are connected and the intake side of the compressor 21 and the indoor heat exchange are connected. (Refer to the solid line of the four-way switching valve 22 in FIG. 2) and the indoor heat exchanger 31 is used as a refrigerant condenser compressed by the compressor 21 during heating operation. And in order to make the outdoor heat exchanger 23 function as an evaporator of the refrigerant | coolant condensed in the indoor heat exchanger 31, while connecting the discharge side of the compressor 21 and the gas side of the indoor heat exchanger 31, it is a compressor. 21 inhalation side It is possible to connect the gas side of the outdoor heat exchanger 23 (heating operation state: see the broken lines in FIG. 2 four-way switching valve 22).

  The outdoor heat exchanger 23 and the indoor heat exchanger 31 are cross-fin type fin-and-tube heat exchangers constituted by heat transfer tubes and a large number of fins. The outdoor heat exchanger 23 is located inside the dehumidifying space Z2. The indoor heat exchanger 31 exchanges heat with the air inside the greenhouse space Z1. Although not shown, the outdoor unit 2 has an outdoor fan that promotes heat exchange between the outdoor heat exchanger 23 and ambient air (air inside the dehumidifying space Z2). An indoor fan that promotes heat exchange between the heat exchanger 31 and ambient air (air inside the greenhouse space Z1) is provided.

  The expansion valve 24 is an electric expansion valve that is provided between the outdoor heat exchanger 23 and the indoor heat exchanger 31 and adjusts the pressure and flow rate of the refrigerant.

  In the present embodiment, in the refrigerant circuit 5, during the cooling operation, the outdoor heat exchanger 23 becomes a condenser and heats by exchanging heat with the air inside the dehumidifying space Z2, and the indoor heat exchanger 31 becomes an evaporator and becomes a greenhouse. Heat exchange with the air inside the space Z1 is performed to cool the air inside the greenhouse space Z1. On the other hand, during the heating operation, the outdoor heat exchanger 23 serves as an evaporator, performs heat exchange with the air inside the dehumidifying space Z2 to cool the air inside the dehumidifying space Z2, and the indoor heat exchanger 31 serves as a condenser to store the greenhouse space. Heat is exchanged with the air inside Z1. In addition, when the outdoor heat exchanger 23 and the indoor heat exchanger 31 function as an evaporator, the heat exchanged by the heat exchangers 23 and 31 functioning as an evaporator is cooled and dehumidified at the same time. Will be done. This is because the moisture-containing air is cooled to drop below its dew point in most cases, so the moisture contained in the air is removed as condensed water in the heat exchangers 23 and 31 functioning as an evaporator. Because it will be.

  The indoor unit includes a greenhouse temperature sensor Se1 as temperature detecting means for detecting the temperature of the greenhouse space Z1 as the greenhouse temperature T1, and a greenhouse humidity sensor Se2 as humidity detecting means for detecting the humidity of the greenhouse space Z1 as the greenhouse humidity H1. 3, an outside air temperature sensor Se3 that detects the temperature of the outside space Z3 as the outside air temperature T2 is provided in the outside space Z3.

  In the present embodiment, the control unit 7 is configured using, for example, a microcomputer having a CPU, a memory, an input / output interface, and the like. Further, as shown in FIG. 3, the control unit 7 is connected so as to receive detection signals of various sensors Se1, Se2, Se3, and various devices and valves 21 based on these detection signals. , 22, D1, and D2 are connected so that they can be controlled.

<Temperature and humidity control>
In the present embodiment, the air conditioning system 10 performs temperature and humidity control for controlling the greenhouse temperature T1 and the greenhouse humidity H1 of the greenhouse space Z1 of the vinyl house 8 to appropriate target values (target temperature Tt and target humidity Ht). ing. The target temperature Tt and the target humidity Ht are set to optimum values depending on the plant to be horticultured and its growth process. In this embodiment, the vinyl house 8 is used for horticulture. For example, when used for hydroponics, the greenhouse 8 is basically in a state where water is sprayed in the greenhouse space Z1 of the vinyl house 8. The humidity inside the greenhouse space Z1 is high (for example, the relative humidity is about 85 to 90%). Therefore, even when performing the heating operation, the humidity is sufficiently adjusted so that the humidity is adjusted by performing the dehumidifying operation. In the present embodiment, in the air conditioning system 10, heating / dehumidification control in which dehumidification operation is performed in the heating operation state is performed in winter, and cooling / dehumidification control in which dehumidification operation is performed in the cooling operation state is performed in summer. . That is, the temperature and humidity control includes heating dehumidification control and cooling dehumidification control. In the air conditioning system 10, it is determined whether it is summer or winter based on the outside air temperature T2. In general, in the intermediate period that is a period other than winter and summer, it is determined whether it is the above-described winter or summer, and control based on the determined result is performed.

(Heating dehumidification control)
In the heating / dehumidification control, the heating operation is performed so as to reach the target temperature Tt as a premise. And in the state where this heating operation is performed, first, the control unit 7 determines whether or not the greenhouse humidity H1 exceeds the target humidity Ht. When the control unit 7 determines that the greenhouse humidity H1 exceeds the target humidity Ht, the house bypass damper D1 is opened and the outside air release damper D2 is closed (heating dehumidified state: house bypass damper in FIG. 1). D1 and the solid line of open air damper D2). Thereby, the air heat-exchanged and dehumidified by the outdoor heat exchanger 23 discharged | emitted inside the dehumidification space Z2 can be introduce | transduced into the greenhouse space Z1 inside. At this time, air inside the greenhouse space Z1 with high humidity is also introduced into the dehumidifying space Z2 (that is, the air inside the greenhouse space Z1 and the air inside the dehumidifying space Z2 are mixed). ) Therefore, the high-humidity air inside the greenhouse space Z1 is guided to the dehumidifying space Z2 and exchanged with the outdoor heat exchanger 23 functioning as an evaporator, whereby the air can be dehumidified and dehumidified. The air can be reintroduced into the greenhouse space Z1. In this way, heating dehumidification control is performed. When the control unit 7 determines that the greenhouse humidity H1 does not exceed the target humidity Ht, the house bypass damper D1 is closed and the outside air release damper D2 is opened. Inside the dehumidifying space Z2, the outside air (Heating operation state: see broken lines of house bypass damper D1 and outside air release damper D2 in FIG. 1).

(Cooling dehumidification control)
In the cooling / dehumidification control, as in the heating / dehumidification control, the cooling operation is performed so as to reach the target temperature Tt. In this case, the control unit 7 performs the cooling operation with the house bypass damper D1 closed and the outside air release damper D2 opened (cooling dehumidification state: the house bypass damper D1 and the outside air release damper in FIG. 1). (See dashed line D2). By performing this cooling operation, since the indoor heat exchanger 31 functions as an evaporator, the dehumidifying operation is naturally performed in the cooling operation state.

<Features>
(1)
In the air conditioning system 10 according to the present embodiment, in the winter season, the control unit 7 performs the heating operation of the air conditioning apparatus 1 so that the greenhouse temperature T1 of the greenhouse space Z1 approaches the target temperature Tt, and the greenhouse humidity H1 is the target. The control unit 7 controls the house bypass damper D1 and the outside air release damper D2 so as to approach the humidity Ht. Specifically, as heating dehumidification control, when the greenhouse humidity H1 exceeds the target humidity Ht during heating operation, the house bypass damper D1 is opened and the outside air release damper D2 is closed. When the greenhouse humidity H1 does not exceed the target humidity Ht during the heating operation, the house bypass damper D1 is closed and the outside air release damper D2 is open.

  Therefore, the air discharged by the outdoor unit 2 arranged in the dehumidifying space Z2 can be guided to the greenhouse space Z1. That is, the air dehumidified by heat exchange by the outdoor heat exchanger 23 can be sent to the greenhouse space Z1. This is because the outdoor heat exchanger 23 functions as an evaporator in the heating operation, so that the intake air can be cooled and excess water can be removed. By performing such heating dehumidification control, the air in the greenhouse space Z1 can be dehumidified while performing the heating operation. Thereby, heating dehumidification can be performed only by using the air conditioning apparatus 1 without using the apparatus which requires a fuel. For this reason, the running cost concerning fuel can be reduced and energy consumption can be reduced.

(2)
In the air conditioning system 10 according to the present embodiment, the control unit 7 performs the cooling operation of the air conditioning apparatus 1 so that the greenhouse temperature T1 of the greenhouse space Z1 approaches the target temperature Tt in the summer. Thus, since the air conditioning apparatus 1 is performing the cooling operation and the indoor heat exchanger 31 functions as an evaporator, the indoor heat exchanger 31 is dehumidifying the greenhouse space Z1. Even without further providing a dehumidifier, the cooling and dehumidification can be realized only by the air conditioner constituted by the heat source unit and the utilization unit.

<Modification>
(1)
In the above embodiment, the dehumidifying space Z2 different from the greenhouse space Z1 is provided, and switching between the heating operation and the cooling operation based on the greenhouse temperature T1, the outside air temperature T2, and the greenhouse humidity H1, or the house bypass damper D1 and Although the open / close control of the outdoor air release damper D2 is performed as temperature / humidity control, the present invention is not limited to this, and the outdoor unit 2 may not be provided in the dehumidifying space Z2.

  For example, as shown in FIG. 4, the outdoor unit 2 is disposed in the external space Z3, and a dehumidified air discharge duct P1 and a greenhouse air intake duct P2 capable of communicating between the outdoor unit 2 and the greenhouse space Z1 are provided. It is also possible to adopt a form (air conditioning system 10a) in which the air in the greenhouse space Z1 is directly introduced into the outdoor unit 2. In this case, the dehumidified air discharge duct P1 is provided with a first damper D1a capable of communicating or blocking air exchanged by the outdoor heat exchanger 23 into the greenhouse space Z1. The air intake duct P2 is provided with a second damper D1b capable of communicating and blocking air sucked into the outdoor unit 2 from the inside of the greenhouse space Z1. The outdoor unit 2 includes a first outdoor air damper D2a that can be introduced into the outdoor heat exchanger 23, and a second outdoor air damper D2b that can discharge the air after heat exchange by the outdoor heat exchanger 23 to the outside air. Is provided.

  And in the temperature / humidity control in the air conditioning system 10a in the modified example (1), the control unit 7 opens the first damper D1a and the second damper D1b in the heating dehumidification state, and opens the first outside air damper D2a and the second The outside air damper D2b is closed (see the solid lines of the dampers D1a, D1b, D2a, and D2b in FIG. 4). Then, in the heating operation state or the cooling / dehumidifying state, the first damper D1a and the second damper D1b are closed, and the first outside air damper D2a and the second outside air damper D2b are opened (respective dampers D1a, D1b, D2a in FIG. 4). , D2b dashed line).

(2)
In the above embodiment, the dehumidifying space Z2 different from the greenhouse space Z1 is provided, and switching between the heating operation and the cooling operation based on the greenhouse temperature T1, the outside air temperature T2, and the greenhouse humidity H1, or the house bypass damper D1 and Control of opening / closing of the open air damper D2 is performed as temperature / humidity control, and in the modified example (1), the outdoor unit 2 is provided in the external space Z3, but the present invention is not limited thereto.

For example, as shown in FIG. 5, the outdoor unit 2 may be arranged in the greenhouse space Z1 (referred to as an air conditioning system 10b). In this case, the outdoor unit 2 includes, on the suction side of the outdoor unit 2, a first damper D11b capable of introducing air inside the greenhouse space Z1, and a first outdoor air damper D12a capable of introducing air inside the external space Z3. Are provided on the discharge side of the outdoor unit 2, the second damper D 11 b capable of introducing the air heat-exchanged by the outdoor heat exchanger 23 into the greenhouse space Z 1, and the outdoor heat exchanger capable of introducing the outdoor heat exchanger 23 into the outdoor heat exchanger 23. And a second outside air damper D2b capable of discharging the air after heat exchange by 23 to the outside air. And in the temperature and humidity control in the air conditioning system 10b in the modified example (2), the control unit 7 In the heating and dehumidifying state, the first damper D11a and the second damper D11b are opened, and the first outside air damper D12a and the second outside air damper D12b are closed (respective dampers in FIG. 4). (Refer to the solid lines of D11a, D11b, D12a, and D12b). Then, in the heating operation state or the cooling and dehumidifying state, the first damper D11a and the second damper D11b are closed, and the first outside air damper D12a and the second outside air damper D12b are opened (respective dampers D11a, D11b, D12a in FIG. 4). , D12b (see broken line).

(3)
In the above embodiment, in the heating and dehumidifying control, the house bypass damper D1 is provided between the greenhouse space Z1 and the dehumidifying space Z2, and the greenhouse space Z1 is dehumidified by opening and closing the house bypass damper D1, Furthermore, you may install the air blower etc. which promote mixing of the air of the greenhouse space Z1 and the dehumidification space Z2. Thereby, the dehumidified air can be promptly sent into the greenhouse space Z1.

(4)
In the said embodiment, although only the air conditioning apparatus 1 is utilized for heating operation, you may provide not only this but the auxiliary heating apparatus which needs a fuel, for example in case heating capacity is insufficient.

  Even in this case, in the present invention, the auxiliary heating device is used only when the heating capacity is insufficient, so that it is possible to reduce fuel consumption.

  The air conditioning system according to the present invention has an effect of reducing running costs, and is useful as an air conditioning system for adjusting temperature and humidity in a greenhouse space for horticultural use such as a vinyl house.

The schematic block diagram of the air conditioning system which concerns on one Embodiment of this invention. Schematic of a refrigerant circuit. The control block diagram of an air conditioning system. The schematic block diagram of the air conditioning system which concerns on a modification (1). The schematic block diagram of the air conditioning system which concerns on a modification (2).

Explanation of symbols

2 Outdoor unit (heat source unit)
3 Indoor units (units used)
7 Control part 10, 10a Air conditioning system D1 House bypass damper (air introduction means)
D2 Outside air release damper (outside air introduction means)
D1a, D11a First dampers D1b, D11b Second dampers D2a, D12a First outside air dampers D2b, D12b Second outside air dampers H1 Greenhouse humidity Ht Target humidity Se1 Greenhouse temperature sensor (temperature detection means)
Se2 Humidity sensor T1 Greenhouse temperature Tt Target temperature Z1 Greenhouse space (space to be air-conditioned)
Z2 Dehumidification space (predetermined space)
Z3 External space

Claims (12)

A use unit (3) which is arranged in the air-conditioning target space (Z1) and has a use-side heat exchanger;
A heat source unit (2) having a heat source side heat exchanger;
The first introduction state in which the air heat-exchanged to the heat source side heat exchanger is introduced into the air conditioning target space, and the air heat exchanged to the heat source side heat exchanger is not introduced into the air conditioning target space. Air introduction means (D1) for switching between the first non-introduction state;
Temperature detecting means (Se1) for detecting the temperature in the air conditioning target space as the space temperature (T1);
Humidity detection means (Se2) for detecting the humidity in the air-conditioning target space as the spatial humidity (H1);
Temperature / humidity control for controlling the utilization unit, the heat source unit, and the air introduction unit so that the space temperature approaches the target temperature (Tt) and the space humidity approaches the target humidity (Ht). A control unit (7) to perform;
An air conditioning system (10, 10a). An outside air introduction means (D2) for switching between a second introduction state in which outside air is introduced into the heat source side heat exchanger and a second non-introduction state in which outside air is not introduced into the heat source side heat exchanger;
The control unit further controls the outside air introduction means during the temperature and humidity control.
The air conditioning system (10, 10a) according to claim 1. When the control unit performs a heating operation in which the use side heat exchanger functions as a radiator and the heat source side heat exchanger functions as a heat sink in winter, the spatial humidity is lower than the target humidity In addition, when the air introduction means is switched to the first non-introduction state and the outside air introduction means is switched to the second introduction state, and the spatial humidity is higher than the target humidity, the air introduction means is changed to the first introduction state. A control to switch the outside air introduction means to the second non-introduction state in the 1 introduction state as the temperature and humidity control,
The air conditioning system (10, 10a) according to claim 2. In the summer, the control unit performs the cooling operation in which the use side heat exchanger functions as a heat absorber and the heat source side heat exchanger functions as a condenser, and the outside air introduction unit is set to the second introduction state. Switching control is performed as the temperature and humidity control.
The air conditioning system (10, 10a) according to claim 2 or 3. The controller is
In the case where the heating operation in which the use-side heat exchanger functions as a radiator and the heat-source-side heat exchanger functions as a heat absorber is performed in an intermediate period that is a period other than the winter and the summer, the air conditioning When the humidity of the target space is lower than the target humidity, the air introduction unit is switched to the first non-introduction state and the outside air introduction unit is switched to the second introduction state, and the heating operation is performed in the intermediate period. If the humidity of the air-conditioning target space is higher than the target humidity, the air introduction unit is switched to the first introduction state, and the outside air introduction unit is switched to the second non-introduction state. Control as the temperature and humidity control,
The air conditioning system (10, 10a) according to any one of claims 2 to 4. The heat source unit is disposed in a predetermined space (Z2) different from the air-conditioning target space,
The air introduction means (D1) is capable of introducing air that has been heat-exchanged by the heat-source-side heat exchanger and accumulated in the predetermined space into the air-conditioning target space,
The outside air introduction means (D2) can introduce outside air into the predetermined space.
The air conditioning system (10) according to any one of claims 2 to 5. The air introduction means (D1) is an air introduction damper provided between the air-conditioning target space and the predetermined space, and capable of communicating or blocking between the air-conditioning target space and the predetermined space.
The air conditioning system (10) according to claim 6. The outside air introduction means (D2) is an outside air introduction damper that is provided between the external space (Z3) and the predetermined space and can communicate or block between the external space and the predetermined space.
The air conditioning system (10) according to claim 6 or 7. The heat source unit is disposed in an external space (Z3) outside the air conditioning target space,
The air introduction means includes a first air path (P1) capable of introducing the air heat-exchanged by the heat source side heat exchanger into the air conditioning target space, and air inside the air conditioning target space as the heat source side heat exchanger. A second air path (P2) that can be introduced into the first air path, a first damper (D1a) that can open and close the first air path, and a second damper (D1b) that can open and close the second air path,
The outside air introduction means includes a first outside air damper (D2a) capable of introducing outside air into the heat source side heat exchanger, and a second outside air capable of discharging air exchanged by the heat source side heat exchanger to the outside space. A damper (D2b),
The air conditioning system (10a) according to any one of claims 2 to 5. The air introduction means opens the first damper and the second damper as the first introduction state, closes the first damper and the second damper as the first non-introduction state,
The outside air introduction means opens the outside air damper as the second introduction state, and closes the outside air damper as the second non-introduction state.
The air conditioning system (10a) according to claim 9. The heat source unit is disposed in the air conditioning target space (Z1),
The air introduction means introduces air that has been heat-exchanged by the heat source side heat exchanger into the air conditioning target space (D11a), and introduces air in the air conditioning target space into the heat source side heat exchanger. A possible second damper (D11b),
The outside air introduction means includes a first outside air damper (D12a) capable of introducing outside air into the heat source side heat exchanger, and a second outside air capable of discharging air exchanged by the heat source side heat exchanger to the outside space. A damper (D12b),
The air conditioning system (10b) according to any one of claims 2 to 5. The air introduction means opens the first introduction damper and the second introduction damper as the first introduction state, closes the first introduction damper and the second introduction damper as the first non-introduction state,
The outside air introduction means opens the outside air damper as the second introduction state, and closes the outside air damper as the second non-introduction state.
The air conditioning system (10b) according to claim 11.

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