JP2017040431A - Heat pump system, control device, control method, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To restrict cold air delivery to a room at the end of defrosting operation.SOLUTION: A heat pump system comprises: a heat pump system body which includes a compressor, an indoor heat exchanger, an outdoor heat exchanger, a blower fan for blowing the air heat exchanged by the indoor heat exchanger, an air duct having an air supply passage for introducing air to a room and an exhaust passage for introducing air to outdoor, and a damper for switching the air passage to the air supply passage or the exhaust passage; and a control device which includes an operation changeover control part for switching the heat pump system body to a heating operation or a defrosting operation and an air channel changeover control part for introducing air to the air supply passage during the heating operation or to the exhaust passage during the defrosting operation by controlling the damper, in which when the operation changeover control part switches the heat pump system body from the defrosting operation to the heating operation, the air channel changeover control part controls the damper so that the damper switches the air passage from the exhaust passage to the air supply passage with delay from the operation switching.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a heat pump system, a control device, a control method, and a program.

  When the outside air temperature falls during the heating operation of an air heat source heat pump such as a drying heat pump, the outdoor heat exchanger is frosted, and the heat pump may perform a defrosting operation (defrost operation) in order to melt the attached frost. In the defrosting operation, since the heat pump operates in the cooling cycle, the air is cooled by the indoor heat exchanger. When the cooled air flows into the dryer through the air passage for drying air, the temperature in the dryer and the temperature of the air passage are lowered, and the drying temperature is disturbed.

On the other hand, Patent Document 1 describes a technique related to a defrosting operation of a heat pump air conditioner. The air conditioner control device described in Patent Document 1 closes the blown air amount adjusting damper and opens the exhaust damper at the time of defrosting during heating operation. On the other hand, the control device always closes the exhaust damper.
According to Patent Document 1, this prevents the residents in the air conditioning room from feeling uncomfortable due to cold air during defrosting during heating operation.

Japanese Utility Model Publication No. 62-167026

  When the heat pump finishes the defrosting operation and switches to the drying operation or the heating operation, the temperature of the indoor heat exchanger is lowered by the defrosting operation, so that cold air can be sent into the room (drying room or air-conditioning room). There is sex. In the case of a heat pump for drying, the temperature inside the dryer and the temperature of the air path are lowered by the delivery of cold air, which causes the drying temperature to be disturbed. Moreover, in the case of a heat pump type air conditioner, unpleasant feeling is given to the occupant in the air-conditioning room by sending out cold air.

  The present invention provides a heat pump system, a control device, a control method, and a program that can suppress the delivery of cold air to the room when the heat pump finishes the defrosting operation.

  According to the first aspect of the present invention, the heat pump system includes a compressor that compresses a gaseous refrigerant, an indoor heat exchanger that liquefies the refrigerant compressed by the compressor and dissipates heat of condensation, and absorbs the heat of vaporization. An outdoor heat exchanger that vaporizes the liquid refrigerant from the indoor heat exchanger, a blower fan that blows air exchanged by the indoor heat exchanger, an air supply path that guides the air into the room, and the air outside the room A heat pump system main body including a duct having an exhaust path for guiding, and a damper for switching the air path between the air supply path and the exhaust path, and the heat exchanger system radiates heat from the heat pump system main body. An operation switching control unit that switches between a heating operation in which the outdoor heat exchanger absorbs heat and a defrosting operation in which the indoor heat exchanger absorbs heat and the outdoor heat exchanger dissipates, and An air path that controls the damper so that the damper guides the air to the air supply path during the heating operation and controls the damper so that the damper guides the air to the exhaust path during the defrosting operation A control device including a switching control unit, and the air path switching control unit is configured to delay the damper when the operation switching control unit switches the heat pump system body from the defrosting operation to the heating operation. Controls the damper so as to switch the air path from the exhaust path to the air supply path.

  The air path switching control unit is configured such that after the predetermined time has elapsed after the operation switching control unit switches the heat pump system main body from the defrosting operation to the heating operation, the damper moves the air path from the exhaust path. You may make it control the said damper so that it may switch to an air supply path.

  The heat pump system body includes a blown air temperature sensor that measures a blown air temperature from the indoor heat exchanger, and the air path switching control unit is configured so that the operation switching control unit removes the heat pump system body from the defrosting operation. After the switching to the heating operation, when the blown air temperature reaches a predetermined temperature, the damper controls the damper so that the air path is switched from the exhaust path to the air supply path. Good.

  The heat pump system body includes an outdoor heat exchanger temperature sensor that measures the temperature of the outdoor heat exchanger, and the air path switching control unit is configured so that the operation switching control unit removes the heat pump system body from the defrosting operation. After the switching to the heating operation, when the temperature of the outdoor heat exchanger reaches a predetermined temperature, the damper controls the damper to switch the air path from the exhaust path to the air supply path. May be.

  The heat pump system main body includes a pressure sensor that measures the pressure of the refrigerant compressed by the compressor, and the air path switching control unit is configured so that the operation switching control unit moves the heat pump system main body from the defrosting operation to the heating operation. When the pressure of the refrigerant compressed by the compressor becomes higher than a predetermined pressure, the damper controls the damper so that the air path is switched from the exhaust path to the air supply path. You may do it.

  When the operation switching control unit switches the heat pump system main body from the defrosting operation to the heating operation, the blower fan increases the rotation speed of the blower fan, and the air path switching control unit When the rotational speed of the fan becomes larger than a predetermined rotational speed, the damper may control the damper so that the air path is switched from the exhaust path to the air supply path.

  According to the second aspect of the present invention, the control device includes a compressor that compresses a gaseous refrigerant, an indoor heat exchanger that liquefies the refrigerant compressed by the compressor and dissipates heat of condensation, and absorbs the heat of vaporization. An outdoor heat exchanger that vaporizes the liquid refrigerant from the indoor heat exchanger, a blower fan that blows air exchanged by the indoor heat exchanger, an air supply path that guides the air into the room, and the air outside the room A control device that controls a heat pump system main body including a duct having an exhaust path for guiding, and a damper that switches the air path to either the air supply path or the exhaust path, the heat pump system main body, An operation switching control that switches between a heating operation in which the indoor heat exchanger dissipates heat and the outdoor heat exchanger absorbs heat and a defrost operation in which the indoor heat exchanger absorbs heat and the outdoor heat exchanger dissipates heat. And controlling the damper so that the damper guides the air to the air supply path during the heating operation, and controls the damper so that the damper guides the air to the exhaust path during the defrosting operation. The air path switching control unit, and when the operation switching control unit switches the heat pump system main body from the defrosting operation to the heating operation, the damper is delayed from the operation switching. The damper is controlled to switch the air path from the exhaust path to the air supply path.

  According to the third aspect of the present invention, the control method includes a compressor that compresses a gaseous refrigerant, an indoor heat exchanger that liquefies the refrigerant compressed by the compressor and radiates heat of condensation, and vaporization. An outdoor heat exchanger that absorbs heat and vaporizes a liquid refrigerant from the indoor heat exchanger, a blower fan that blows air that has been heat-exchanged by the indoor heat exchanger, an air supply path that guides the air into the room, and A control method for controlling a heat pump system main body comprising a duct having an exhaust path for guiding air to the outside, and a damper for switching the air path to either the air supply path or the exhaust path, the heat pump The system main body is either a heating operation in which the indoor heat exchanger radiates heat and the outdoor heat exchanger absorbs heat, or a defrosting operation in which the indoor heat exchanger absorbs heat and the outdoor heat exchanger radiates heat switching An operation switching control step, and the damper controls the damper so as to guide the air to the air supply path during the heating operation, and the damper guides the air to the exhaust path during the defrosting operation. An air path switching control step for controlling a damper, and in the air path switching control step, the damper causes the air path to be delayed from switching from the defrosting operation to the heating operation in the operation switching control step. The damper is controlled so as to switch from the exhaust path to the air supply path.

  According to the fourth aspect of the present invention, the program compresses a gaseous refrigerant, an indoor heat exchanger that liquefies the refrigerant compressed by the compressor and dissipates the heat of condensation, and absorbs the heat of vaporization. An outdoor heat exchanger that vaporizes the liquid refrigerant from the indoor heat exchanger, a blower fan that blows air that has been heat-exchanged by the indoor heat exchanger, an air supply path that guides the air to the room, and the air to the outdoors A computer having a duct having an exhaust path and a damper that switches a path of the air to either the air supply path or the exhaust path; and a computer that controls the heat pump system body, the indoor heat exchange An operation switching control that switches between a heating operation in which a heat is released and the outdoor heat exchanger absorbs heat and a defrosting operation in which the indoor heat exchanger absorbs heat and the outdoor heat exchanger dissipates heat. And controlling the damper so that the damper guides the air to the air supply path during the heating operation, and controls the damper so that the damper guides the air to the exhaust path during the defrosting operation. The air path switching control step is performed, and in the air path switching control step, the damper causes the air path to be changed after the switching from the defrosting operation to the heating operation in the operation switching control step. This is a program for controlling the damper to switch from the exhaust path to the air supply path.

  According to the above-described heat pump system, control device, control method, and program, it is possible to suppress the delivery of cold air to the room when the heat pump finishes the defrosting operation.

It is a schematic block diagram which shows the apparatus structure of the heat pump system in one Embodiment of this invention. It is explanatory drawing which shows the example of the air path which the ventilation fan in the same embodiment blows. It is a schematic block diagram which shows the function structure of the control apparatus in the embodiment. It is a flowchart which shows the example of the procedure of the process which the control apparatus in the embodiment performs.

Hereinafter, although embodiment of this invention is described, the following embodiment does not limit the invention concerning a claim. In addition, not all the combinations of features described in the embodiments are essential for the solving means of the invention.
FIG. 1 is a schematic configuration diagram showing an apparatus configuration of a heat pump system according to an embodiment of the present invention. As shown in the figure, the heat pump system 1 includes a compressor 11, a four-way valve 12, an indoor heat exchanger 13, a blower fan 14, a throttle 15, an outdoor heat exchanger 16, a pressure sensor 21, An indoor heat exchanger temperature sensor 22, an outdoor heat exchanger temperature sensor 23, a first pipe W11 to a sixth pipe W16, and a control device 300 are provided. The compressor 11 and the four-way valve 12 are connected by a first pipe W11 and a fifth pipe W15. The first pipe W <b> 11 is connected to the refrigerant outlet of the compressor 11, and the sixth pipe W <b> 16 is connected to the refrigerant inlet of the compressor 11. The four-way valve 12 and the indoor heat exchanger 13 are connected by a second pipe W12. The indoor heat exchanger 13 and the throttle 15 are connected by a third pipe W13. The throttle 15 and the outdoor heat exchanger 16 are connected by a fourth pipe W14. The outdoor heat exchanger 16 and the four-way valve 12 are connected by a fifth pipe W15.
The heat pump system 1 further includes a heat exchanger side duct 31, a dryer side duct 32, an outdoor duct 33, and a damper 34, which will be described later with reference to FIG.

In the heat pump system 1, each part other than the control device 300 is collectively referred to as a heat pump system main body 10. The control device 300 controls the heat pump system main body 10.
In addition, although the case where the heat pump system 1 is a heat pump type drying system will be described below as an example, the use of the heat pump system 1 is not limited to drying. For example, the heat pump system 1 may be a heat pump air conditioning system. In this case, the heat pump system 1 supplies air to the air-conditioned room instead of the drying room.

The heat pump system 1 is a system that supplies drying air to a drying chamber. The heat pump system 1 operates by switching between a heating operation (drying operation) and a defrosting operation.
In the heating operation, the gaseous refrigerant compressed by the compressor 11 flows into the indoor heat exchanger 13 through the first pipe W11, the four-way valve 12, and the second pipe W12 in this order. The gaseous refrigerant that has flowed into the indoor heat exchanger 13 dissipates heat and condenses by heat exchange with air. The air around the indoor heat exchanger 13 becomes high temperature (for example, 80 degrees (° C.)) due to heat radiation, and the blower fan 14 blows this high temperature air to the drying chamber as drying air.
The refrigerant that has become liquid by condensation is decompressed by the throttle 15 via the third pipe W13, and then flows into the outdoor heat exchanger 16 via the fourth pipe W14. The refrigerant flowing into the outdoor heat exchanger 16 absorbs heat and evaporates due to heat exchange with the outside air around the outdoor heat exchanger 16. The refrigerant turned into a gas by evaporation flows into the compressor 11 through the fifth pipe W15, the four-way valve 12, and the sixth pipe W16 in this order, and is compressed.

On the other hand, in the defrosting operation, the gaseous refrigerant compressed by the compressor 11 flows into the outdoor heat exchanger 16 via the first pipe W11, the four-way valve 12, and the fifth pipe W15 in this order. The gaseous refrigerant that has flowed into the outdoor heat exchanger 16 dissipates heat and condenses by heat exchange with the outside air around the outdoor heat exchanger 16. The outdoor heat exchanger 16 is heated by this heat radiation, and the frost adhering to the outdoor heat exchanger 16 is melted.
The refrigerant that has become liquid by condensation is decompressed by the throttle 15 via the fourth pipe W14 and then flows into the indoor heat exchanger 13 via the third pipe W13. The refrigerant flowing into the indoor heat exchanger 13 absorbs heat and evaporates by heat exchange with the air around the indoor heat exchanger 13. The refrigerant turned into gas by evaporation flows into the compressor 11 through the second pipe W12, the four-way valve 12, and the sixth pipe W16 in this order, and is compressed.

The compressor 11 compresses a gaseous refrigerant.
The four-way valve 12 switches between the heating operation and the defrosting operation by switching the refrigerant flow path. In the heating operation, the refrigerant from the compressor 11 is caused to flow into the indoor heat exchanger 13 by connecting the first pipe W11 and the second pipe W12, and the fifth pipe W15 and the sixth pipe W16 are connected. Thus, the refrigerant from the outdoor heat exchanger 16 is caused to flow into the compressor 11. On the other hand, in the defrosting operation, the refrigerant from the compressor 11 is caused to flow into the outdoor heat exchanger 16 by connecting the first pipe W11 and the fifth pipe W15, and the second pipe W12 and the sixth pipe W16 Is connected to cause the refrigerant from the indoor heat exchanger 13 to flow into the compressor 11.

The indoor heat exchanger 13 exchanges heat between the refrigerant and the air around the indoor heat exchanger 13. In the heating operation, a high-pressure gaseous refrigerant flows into the indoor heat exchanger 13 and dissipates heat and condenses by heat exchange with indoor air. Therefore, the indoor heat exchanger 13 liquefies the gaseous refrigerant compressed by the compressor 11 and dissipates the heat of condensation to the air around the indoor heat exchanger 13. On the other hand, in the defrosting operation, a low-pressure liquid refrigerant flows into the indoor heat exchanger 13 and absorbs heat and evaporates by heat exchange with indoor air.
The blower fan 14 blows air (air around the indoor heat exchanger 13) that has exchanged heat with the indoor heat exchanger 13.

FIG. 2 is an explanatory diagram illustrating an example of an air path through which the blower fan 14 blows air. As shown in the figure, the air passage through which the blower fan 14 blows air is formed by a duct system 30 in which a heat exchanger-side duct 31, a dryer-side duct 32, and an outdoor duct 33 are combined in a trifurcated manner. Yes. The duct system 30 corresponds to an example of a duct in the present embodiment.
The heat exchanger side duct 31 is provided with an indoor heat exchanger 13 and a blower fan 14. The blower fan 14 is provided on the side opposite to the dryer side duct 32 and the outdoor side duct 33 when viewed from the indoor heat exchanger 13, and the blower fan 14 removes the air around the indoor heat exchanger 13 from the dryer side. The air is sent to the duct 32 and the outdoor duct 33 side.

A damper 34 for switching the air path is provided in a trifurcated portion of the heat exchanger side duct 31, the dryer side duct 32, and the outdoor duct 33. The damper 34 switches the air path according to the control of the control device 300.
When the heat pump system main body 10 is performing a heating operation, the damper 34 closes the path (air path) from the heat exchanger side duct 31 to the outdoor duct 33. In this state, an air path is formed from the heat exchanger side duct 31 through the dryer side duct 32. The dryer-side duct 32 communicates with the drying chamber, and the drying air heated to a high temperature by the indoor heat exchanger 13 is blown into the drying chamber. The blower fan 14 and the indoor heat exchanger 13 are provided in the vicinity of the drying chamber (for example, adjacent to the drying chamber), and the drying air that has become high temperature in the indoor heat exchanger 13 is blown to the drying chamber while the temperature is high. Is done. The air path passing from the heat exchanger side duct 31 to the dryer side duct 32 corresponds to an example of an air supply path. The air path passing from the heat exchanger side duct 31 to the dryer side duct 32 guides the air heat-exchanged by the indoor heat exchanger 13 into the drying chamber.

  On the other hand, when the heat pump system main body 10 is performing the defrosting operation, the damper 34 closes the path from the heat exchanger side duct 31 to the dryer side duct 32. In this state, an air passage is formed from the heat exchanger side duct 31 through the outdoor duct 33. The outdoor duct 33 communicates with the outdoors (atmosphere side), and the air having a low temperature in the indoor heat exchanger 13 is blown to the outdoors. Thereby, cold air can be prevented from flowing into the drying chamber during the defrosting operation. Note that the connection destination of the outdoor duct 33 is not limited to the outside, but may be outside the drying room. For example, the outdoor duct 33 may be connected to a room other than the drying room.

Moreover, the air around the indoor heat exchanger 13 can be replaced because the blower fan 14 continues blowing air during the defrosting operation. Thereby, the indoor heat exchanger 13 can absorb heat from the air supplied by the blower fan 14 during the defrosting operation, and the outdoor heat exchanger 16 generates more heat than when the blower fan 14 is stopped. Therefore, the defrosting operation can be completed earlier than when the blower fan 14 is stopped. Moreover, the temperature drop of the air around the indoor heat exchanger 13 and the indoor heat exchanger 13 can be made relatively small, and after the heat pump system body 10 is switched from the defrosting operation to the heating operation, in a relatively short time. Hot air can be blown.
The air path passing from the heat exchanger side duct 31 to the outdoor duct 33 corresponds to an example of an exhaust path. The air path passing from the heat exchanger side duct 31 to the outdoor duct 33 guides the air heat-exchanged by the indoor heat exchanger 13 to the outside of the drying room (for example, outdoors).

Here, when the heat pump system main body 10 is switched from the defrosting operation to the heating operation, the damper 34 switches the air path with a delay from the operation switching in accordance with the control of the control device 300. Specifically, after the temperature of the indoor heat exchanger 13 rises to a predetermined temperature, the damper 34 is connected to the dryer side from the heat exchanger side duct 31 through the air passage from the heat exchanger side duct 31 to the outdoor duct 33. Switching to the air path to the duct 32 is performed.
Thus, when the heat pump system main body 10 is switched from the defrosting operation to the heating operation, the damper 34 can prevent the inflow of the cold air into the drying chamber by switching the air path with a delay from the operation switching. it can.

The throttle 15 depressurizes the liquid refrigerant flowing through the throttle 15 itself. This decompression facilitates evaporation of the refrigerant.
The outdoor heat exchanger 16 exchanges heat between the refrigerant and the outside air around the outdoor heat exchanger 16. In the heating operation, the low-pressure liquid refrigerant decompressed by the throttle 15 flows into the outdoor heat exchanger 16 and absorbs heat and evaporates by heat exchange with the outside air. Therefore, the outdoor heat exchanger 16 absorbs the heat of vaporization from the outside air and vaporizes the liquid refrigerant. On the other hand, in the defrosting operation, the high-pressure gaseous refrigerant compressed by the compressor 11 flows into the outdoor heat exchanger 16, dissipates heat by heat exchange with the outside air, and condenses.

The pressure sensor 21 is provided in the first pipe W11 and measures the outlet pressure of the compressor 11 (the refrigerant pressure at the outlet of the compressor 11). The pressure measured by the pressure sensor 21 is used for detecting an abnormality such as a failure of the compressor 11. Further, as will be described later, the control device 300 may determine the switching timing of the air path using the pressure measurement value obtained by the pressure sensor 21.
The indoor heat exchanger temperature sensor 22 is installed in the indoor heat exchanger 13 and measures the temperature of the indoor heat exchanger 13. The indoor heat exchanger temperature sensor 22 is installed in a refrigerant pipe in the indoor heat exchanger 13, for example. Or the indoor heat exchanger temperature sensor 22 may be installed in places other than refrigerant | coolant piping, such as being installed in the housing | casing of the indoor heat exchanger 13. FIG.
Based on the temperature of the indoor heat exchanger 13 measured by the indoor heat exchanger temperature sensor 22, the control device 300 determines whether or not to blow air to the drying chamber. Specifically, after the operation switching control unit 391 switches the heat pump system main body 10 from the defrosting operation to the heating operation, the controller 300 determines that the temperature of the indoor heat exchanger 13 is higher than a damper switching indoor heat exchange temperature described later. When it is determined that the air flow has changed, the damper 34 is controlled so that the air path is switched and the air from the indoor heat exchanger 13 is supplied to the drying chamber.
As the indoor heat exchanger temperature sensor 22, for example, a thermistor type temperature sensor can be used. Alternatively, the indoor heat exchanger temperature sensor 22 may be a temperature sensor other than the thermistor, such as a resistance temperature detector type temperature sensor.

The outdoor heat exchanger temperature sensor 23 is installed in the outdoor heat exchanger 16 and measures the temperature of the outdoor heat exchanger 16. The outdoor heat exchanger temperature sensor 23 is installed, for example, in the refrigerant pipe in the outdoor heat exchanger 16. Or the outdoor heat exchanger temperature sensor 23 may be installed in places other than refrigerant | coolant piping, such as installing in the housing | casing of the outdoor heat exchanger 16. FIG.
Based on the temperature of the outdoor heat exchanger 16 measured by the outdoor heat exchanger temperature sensor 23, the control device 300 switches the operation of the heat pump system main body 10. Specifically, when it determines with the temperature of the outdoor heat exchanger 16 being below the defrost start temperature mentioned later, the control apparatus 300 makes the heat pump system main body 10 defrost operation. Moreover, when it determines with the temperature of the outdoor heat exchanger 16 being higher than the defrost completion temperature mentioned later, the control apparatus 300 makes the heat pump system main body 10 heating operation.
As the outdoor heat exchanger temperature sensor 23, for example, a thermistor type temperature sensor can be used. Alternatively, the outdoor heat exchanger temperature sensor 23 may be a temperature sensor of a system other than the thermistor, such as a resistance temperature sensor.

The control device 300 controls the heat pump system main body 10. The control device 300 is configured using a computer, for example.
FIG. 3 is a schematic block diagram illustrating a functional configuration of the control device 300. As shown in the figure, the control device 300 includes a communication unit 310, a storage unit 380, and a control unit 390. The control unit 390 includes an operation switching control unit 391 and an air path switching control unit 392.
The communication unit 310 communicates with other devices. In particular, the communication unit 310 receives sensor signals indicating sensor measurement values from various sensors provided in the heat pump system main body 10. The communication unit 310 transmits a control signal to each unit of the heat pump system main body 10. The communication unit 310 may receive the sensor measurement value and transmit the control signal using the same communication method, or may use different communication methods.
The memory | storage part 380 is comprised using the memory | storage device with which the control apparatus 300 is provided, and memorize | stores various data.

The control unit 390 controls each part of the heat pump system main body 10. The control unit 390 is realized by, for example, a computer including the control device 300 reading out a program from the storage unit 380 and executing the program.
The operation switching control unit 391 performs switching between the heating operation and the defrosting operation. Specifically, when the temperature of the outdoor heat exchanger 16 becomes equal to or lower than a predetermined temperature during the heating operation, the operation switching control unit 391 switches the connection of the four-way valve 12 so that the heat pump system main body 10 is changed from the heating operation. Switch to defrosting operation. Moreover, when the temperature of the outdoor heat exchanger 16 becomes equal to or higher than a predetermined temperature during the defrosting operation, the operation switching control unit 391 switches the heat pump system main body 10 from the defrosting operation to the heating operation.

The air path switching control unit 392 controls the damper 34 to switch the air path. Specifically, when the operation switching control unit 391 switches the heat pump system main body 10 from the heating operation to the defrosting operation, the air path switching control unit 392 controls the damper 34 to change from the heat exchanger side duct 31 to the dryer side duct. The path to 32 is closed.
On the other hand, when the operation switching control unit 391 switches the heat pump system main body 10 from the defrosting operation to the heating operation, the air path switching control unit 392 controls the damper 34 with a delay from the operation switching, and moves from the heat exchanger side duct 31 to the room. The path to the outer duct 33 is closed. Specifically, after the temperature of the indoor heat exchanger 13 rises to a predetermined temperature, the damper 34 is connected to the dryer side from the heat exchanger side duct 31 through the air passage from the heat exchanger side duct 31 to the outdoor duct 33. Switching to the air path to the duct 32 is performed.

Next, the operation of the control device 300 will be described with reference to FIG.
FIG. 4 is a flowchart illustrating an example of a procedure of processing performed by the control device 300.
In the processing of the figure, the communication unit 310 receives the sensor signal (step S111). In particular, the communication unit 310 acquires a sensor signal indicating a temperature measurement value of the outdoor heat exchanger 16 from the outdoor heat exchanger temperature sensor 23.
Next, the operation switching control unit 391 determines whether or not the temperature of the outdoor heat exchanger 16 obtained in step S111 is equal to or lower than the defrosting start temperature (step S112). Here, the defrosting start temperature is a temperature (temperature of the outdoor heat exchanger 16) set as a determination threshold for determining whether or not the defrosting operation is necessary. The defrost start temperature may be a constant. Alternatively, the operation switching control unit 391 may calculate the defrosting start temperature based on a predetermined sensor measurement value such as the outside air temperature.

When it determines with the temperature of the outdoor heat exchanger 16 being higher than defrost start temperature (step S112: NO), it returns to step S111.
On the other hand, when it determines with the temperature of the outdoor heat exchanger 16 being below defrost start temperature (step S112: YES), the operation switching control part 391 makes the heat pump system main body 10 defrost operation, and an air path switching control part 392. Controls the damper 34 to close the air path from the heat exchanger side duct 31 to the dryer side duct 32 (step S121). Specifically, the operation switching control unit 391 controls the four-way valve 12 to allow the refrigerant from the compressor 11 to flow into the outdoor heat exchanger 16 and to allow the refrigerant from the indoor heat exchanger 13 to flow into the compressor 11. Let Further, the air path switching control unit 392 controls the damper 34 to close the air path from the heat exchanger side duct 31 to the dryer side duct 32, so that the air that has become low temperature in the indoor heat exchanger 13 is stored in the room. It is discharged to the outside via the outer duct 33.

  The operation switching and the air path switching in step S121 are performed almost simultaneously. For example, the operation switching control unit 391 notifies the air path switching control unit 392 that the operation is switched in parallel with outputting the control signal to the four-way valve 12 to the communication unit 310 and transmitting it to the four-way valve 12. . Upon receipt of the notification from the operation switching control unit 391, the air path switching control unit 392 immediately outputs a control signal to the damper 34 to the communication unit 310 and transmits it to the damper 34. Alternatively, the operation switching control unit 391 and the air path switching control unit 392 are configured as one function unit, and a control signal common to the four-way valve 12 and the damper 34 is output to the communication unit 310, and the communication unit 310 The control signal may be transmitted to the four-way valve 12 and the damper 34.

Next, the communication unit 310 receives the sensor signal (step S122). In particular, the communication unit 310 receives a sensor signal indicating a temperature measurement value of the outdoor heat exchanger 16 from the outdoor heat exchanger temperature sensor 23.
Next, the operation switching control unit 391 determines whether or not the temperature of the outdoor heat exchanger 16 obtained in step S122 is higher than the defrosting end temperature (step S123). Here, the defrosting end temperature is a temperature (temperature of the outdoor heat exchanger 16) set as a determination threshold value for determining whether or not the defrosting operation can be ended. The defrost end temperature may be the same temperature as the defrost start temperature. Or the frequent occurrence of the operation switching of the heat pump system main body 10 can be suppressed by setting the defrost end temperature higher than the defrost start temperature.
Further, the defrosting end temperature may be a constant (for example, 6 degrees (° C.)). Alternatively, the operation switching control unit 391 may calculate the defrosting end temperature based on a predetermined sensor measurement value such as the outside air temperature.

When it determines with the temperature of the outdoor heat exchanger 16 being below defrost end temperature (step S123: NO), it returns to step S122.
On the other hand, when it determines with the temperature of the outdoor heat exchanger 16 being higher than defrost end temperature (step S123: YES), the operation switching control part 391 sets the heat pump system main body 10 to a heating operation (step S131).
Next, the communication unit 310 receives the sensor signal (step S132). In particular, the communication unit 310 receives a sensor signal indicating a temperature measurement value of the indoor heat exchanger 13 from the indoor heat exchanger temperature sensor 22.
Next, the operation switching control unit 391 determines whether or not the temperature of the indoor heat exchanger 13 obtained in step S132 is higher than the damper switching indoor heat exchange temperature (step S133). Here, the damper switching indoor heat exchange temperature is the temperature of the indoor heat exchanger 13 that is set as a determination threshold value for switching the air passage after the defrosting operation is completed. The damper switching temperature may be a constant (for example, 80 degrees (° C.)). Alternatively, the operation switching control unit 391 may calculate the damper switching temperature based on a predetermined sensor measurement value such as the air temperature (room temperature) in the drying chamber.

When it determines with the temperature of the indoor heat exchanger 13 being below a damper switching indoor heat exchanger temperature (step S133: NO), it returns to step S132.
On the other hand, when it is determined that the temperature of the indoor heat exchanger 13 is higher than the damper-switching indoor heat exchange temperature (step S133: YES), the air path switching control unit 392 controls the damper 34 to move from the heat exchanger side duct 31 to the room. The air path to the outer duct 33 is closed (step S134). The air path switching control unit 392 controls the damper 34 to close the air path from the heat exchanger side duct 31 to the outdoor side duct 33, so that the air heated to high temperature in the indoor heat exchanger 13 becomes the dryer side duct. 32 is sent to the drying chamber.
Thus, after the air path switching control unit 392 determines that the temperature of the indoor heat exchanger 13 is higher than the damper switching temperature, the air flow from the heat exchanger side duct 31 to the outdoor duct 33 is controlled by controlling the damper 34. By closing the path, it is possible to suppress low-temperature air before the indoor heat exchanger 13 is warmed from flowing into the drying chamber.
Further, the blower fan 14 rotates in a state where the damper 34 closes the air path from the heat exchanger side duct 31 to the dryer side duct 32 and releases the air around the indoor heat exchanger 13 to the outside. When 34 closes the air passage from the heat exchanger side duct 31 to the outdoor duct 33, it is possible to reduce the possibility that low temperature air remains around the indoor heat exchanger 13. Thereby, it can suppress that the low temperature air before the indoor heat exchanger 13 warms flows into a drying chamber.
After step S134, the process returns to step S111.

As described above, when the operation switching control unit 391 switches the heat pump system main body 10 from the defrosting operation to the heating operation, the air path switching control unit 392 is delayed from the operation switching, and the damper 34 is an air path (air path). The damper 34 is controlled so as to switch from the exhaust path (the heat exchanger side duct 31 and the outdoor duct 33) to the air supply path (the heat exchanger side duct 31 and the dryer side duct 32).
As described above, the damper 34 switches the air path after the switching of the operation of the heat pump system main body 10, whereby the sending of cold air to the room when the heat pump system main body 10 finishes the defrosting operation can be suppressed. . Specifically, it is possible to prevent cold air from flowing into the drying chamber before the indoor heat exchanger 13 is warmed.

The timing at which the air path switching control unit 392 controls the damper 34 to switch the air path from the exhaust path to the air supply path is not limited to the timing at which the temperature of the indoor heat exchanger 13 becomes higher than the damper switching temperature.
For example, after a predetermined damper switching time has elapsed since the operation switching control unit 391 switched the heat pump system body 10 from the defrosting operation to the heating operation, the air path switching control unit 392 controls the damper 34 to switch the air path. You may make it make it.

Here, the damper switching time is a time set as a timing for switching the air path after the defrosting operation is completed. The air path switching control unit 392 detects the air path switching timing based on the elapsed time from the operation switching, whereby the heat pump system body 10 does not need to include the indoor heat exchanger temperature sensor 22. In this respect, the configuration of the heat pump system main body 10 can be simplified.
The damper switching time may be a constant. Alternatively, the operation switching control unit 391 may calculate the damper switching time based on a predetermined sensor measurement value such as the air temperature in the drying chamber. The damper switching time can be set, for example, by performing a trial operation or an operation simulation of the heat pump system 1.

  Alternatively, when the operation switching control unit 391 switches the heat pump system main body 10 from the defrosting operation to the heating operation, the air path when the temperature of the blown air from the indoor heat exchanger 13 becomes a predetermined damper switching blown air temperature. The switching control unit 392 may control the damper 34 to switch the air path. Specifically, after the operation switching control unit 391 switches the heat pump system main body 10 from the defrosting operation to the heating operation, the air path switching control unit 392 performs the blowing from the indoor heat exchanger 13 measured by the blowing air temperature sensor. It is determined whether or not the air temperature is equal to or higher than the damper switching blowout air temperature. And when it determines with the blowing air temperature from the indoor heat exchanger 13 having become more than a damper switching blowing air temperature, the air path switching control part 392 controls the damper 34 and changes an air path from an exhaust path to an air supply path. Let them switch.

Here, the blown-out air from the indoor heat exchanger 13 is air blown by the air blown from the blower fan 14 around the indoor heat exchanger 13. That is, the blown air from the indoor heat exchanger 13 is air that has been blown by the blower fan 14 and has passed through the vicinity of the indoor heat exchanger 13. Further, the temperature of air blown from the indoor heat exchanger 13 is the temperature of air blown from the indoor heat exchanger 13.
The installation position of the blown air temperature sensor may be a position in the air path (air flow path from the blower fan 14) during the defrosting operation. Therefore, in the air path passing from the heat exchanger side duct 31 to the outdoor side duct 33 in FIG. 2, the blown-out air flows downstream from the indoor heat exchanger 13 (on the side opposite to the blower fan 14 when viewed from the indoor heat exchanger 13). A temperature sensor may be provided. For example, a blown air temperature sensor may be installed immediately downstream of the indoor heat exchanger 13 (for example, a position 10 centimeters from the indoor heat exchanger 13). Or the blowing air temperature sensor may be installed in the blowing outlet from the outdoor duct 33 to the outdoor side.

Further, the damper switching blown air temperature is the blown air temperature from the indoor heat exchanger 13 set as a determination threshold value for switching the air path after the defrosting operation is completed.
The air path switching control unit 392 detects the air path switching timing based on the temperature of the blown air from the indoor heat exchanger 13, so that the cool air flowing into the room when the heat pump system main body 10 finishes the defrosting operation. Sending can be suppressed.

  Alternatively, after the operation switching control unit 391 switches the heat pump system main body 10 from the defrosting operation to the heating operation, when the temperature of the outdoor heat exchanger 16 reaches a predetermined damper switching outdoor exchange temperature, the air path switching control unit 392 may control the damper 34 to switch the air path. Specifically, after the operation switching control unit 391 switches the heat pump system main body 10 from the defrosting operation to the heating operation, the air path switching control unit 392 includes the outdoor heat exchanger 16 measured by the outdoor heat exchanger temperature sensor 23. It is determined whether or not the temperature has reached the damper switching outdoor exchange temperature. When it is determined that the temperature of the outdoor heat exchanger 16 has reached the damper switching outdoor exchange temperature, the air path switching control unit 392 controls the damper 34 to switch the air path from the exhaust path to the air supply path.

Here, the damper switching outdoor exchange temperature is the temperature of the outdoor heat exchanger 16 that is set as a determination threshold for switching the air passage after the defrosting operation is completed. There is a correlation between the temperature of the outdoor heat exchanger 16 and the temperature of the indoor heat exchanger 13, and the temperature of the indoor heat exchanger 13 can be estimated from the temperature of the outdoor heat exchanger 16.
The air path switching control unit 392 detects the air path switching timing based on the temperature of the outdoor heat exchanger 16, thereby eliminating the need for the heat pump system body 10 to include the indoor heat exchanger temperature sensor 22. In this respect, the configuration of the heat pump system main body 10 can be simplified.
The damper switching outdoor exchange temperature may be a constant. Alternatively, the operation switching control unit 391 may calculate the damper switching outdoor exchange temperature based on a predetermined sensor measurement value such as the air temperature in the drying chamber.

  Alternatively, after the operation switching control unit 391 switches the heat pump system main body 10 from the defrosting operation to the heating operation, when the outlet pressure of the compressor 11 becomes higher than a predetermined damper switching pressure, the air path switching control unit 392 The damper 34 may be controlled to switch the air path. Specifically, after the operation switching control unit 391 switches the heat pump system main body 10 from the defrosting operation to the heating operation, the air path switching control unit 392 performs the damper switching of the outlet pressure of the compressor 11 measured by the pressure sensor 21. It is determined whether or not the pressure has become higher. If it is determined that the outlet pressure of the compressor 11 has become higher than the damper switching pressure, the air path switching control unit 392 controls the damper 34 to switch the air path from the exhaust path to the air supply path.

Here, the damper switching pressure is the outlet pressure of the compressor 11 that is set as a determination threshold value for switching the air passage after the defrosting operation is completed. There is a correlation between the outlet pressure of the compressor 11 and the temperature of the indoor heat exchanger 13, and the higher the outlet pressure of the compressor 11, the higher the temperature of the indoor heat exchanger 13. Therefore, the temperature of the indoor heat exchanger 13 can be estimated from the outlet pressure of the compressor 11.
The air path switching control unit 392 detects the air path switching timing based on the outlet pressure of the compressor 11, thereby eliminating the need for the heat pump system body 10 to include the indoor heat exchanger temperature sensor 22. In this respect, the configuration of the heat pump system main body 10 can be simplified.
The damper switching pressure may be a constant. Alternatively, the operation switching control unit 391 may calculate the damper switching pressure based on a predetermined sensor measurement value such as the air temperature in the drying chamber.

  Alternatively, after the operation switching control unit 391 switches the heat pump system main body 10 from the defrosting operation to the heating operation, the blower fan 14 is caused to increase the rotation speed, and the rotation speed of the blower fan 14 is a predetermined damper switching rotation. When the number is higher than the number, the air path switching control unit 392 may control the damper 34 to switch the air path. Specifically, the blower fan 14 rotates at a relatively low rotational speed during the defrosting operation, and when the operation switching control unit 391 switches the heat pump system main body 10 from the defrosting operation to the heating operation, the blower fan 14 gradually increases. Increase the number of revolutions. Then, the air path switching control unit 392 determines whether or not the rotational speed of the blower fan 14 is higher than the damper switching rotational speed. When it is determined that the rotational speed of the blower fan 14 is higher than the damper switching rotational speed, the air path switching control unit 392 controls the damper 34 to exhaust the air path (the heat exchanger side duct 31 and the outdoor duct 33). To the air supply path (heat exchanger side duct 31 and dryer side duct 32).

Here, the damper switching rotation speed is the rotation speed of the blower fan 14 that is set as a determination threshold value for switching the air passage after the defrosting operation is completed. The operation switching control unit 391 can detect the switching timing of the air path based on the rotational speed of the blower fan 14 as the blower fan 14 gradually increases the rotational speed.
The air path switching control unit 392 detects the air path switching timing based on the rotational speed of the blower fan 14, thereby eliminating the need for the heat pump system body 10 to include the indoor heat exchanger temperature sensor 22. In this respect, the configuration of the heat pump system main body 10 can be simplified.
The blower fan 14 may increase the rotational speed of the blower fan 14 itself at the acceleration. Or you may make it the ventilation fan 14 change a rotation speed based on predetermined | prescribed sensor measured values, such as the exit pressure of the compressor 11 which the pressure sensor 21 measures.

Each unit is recorded by recording a program for realizing all or a part of the functions of the control device 300 on a computer-readable recording medium, causing the computer system to read and execute the program recorded on the recording medium. You may perform the process of. Here, the “computer system” includes an OS and hardware such as peripheral devices.
The “computer-readable recording medium” refers to a storage device such as a flexible medium, a magneto-optical disk, a portable medium such as a ROM and a CD-ROM, and a hard disk incorporated in a computer system. The program may be a program for realizing a part of the functions described above, and may be a program capable of realizing the functions described above in combination with a program already recorded in a computer system.

  The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and includes design changes and the like without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 1 Heat pump system 10 Heat pump system main body 11 Compressor 12 Four-way valve 13 Indoor heat exchanger 14 Blower fan 15 Restriction 16 Outdoor heat exchanger 21 Pressure sensor 22 Indoor heat exchanger temperature sensor 23 Outdoor heat exchanger temperature sensor 30 Duct system 31 Heat Exchanger side duct 32 Dryer side duct 33 Outdoor duct 34 Damper 300 Control device 310 Communication unit 380 Storage unit 390 Control unit 391 Operation switching control unit 392 Air path switching control unit

Claims (9)

A compressor that compresses a gaseous refrigerant, an indoor heat exchanger that liquefies the refrigerant compressed by the compressor and dissipates heat of condensation, and an outdoor that absorbs heat of vaporization and vaporizes the liquid refrigerant from the indoor heat exchanger A heat exchanger, a blower fan for blowing air exchanged by the indoor heat exchanger, a duct having an air supply path for guiding the air into the room and an exhaust path for guiding the air to the outside, and a path of the air A heat pump system body comprising a damper that switches to either the air supply path or the exhaust path;
Either the heating operation in which the indoor heat exchanger dissipates the heat pump system main body and the outdoor heat exchanger absorbs heat, or the defrosting operation in which the indoor heat exchanger absorbs heat and the outdoor heat exchanger dissipates heat An operation switching control unit that switches between the two, and the damper controls the damper so that the damper guides the air to the air supply path during the heating operation, and the damper causes the air to flow into the exhaust path during the defrosting operation. A control device including an air path switching control unit for controlling the damper to guide,
When the operation switching control unit switches the heat pump system main body from the defrosting operation to the heating operation, the damper switches the air path from the exhaust path with a delay from the operation switching. A heat pump system that controls the damper so as to switch to an air supply path.   The air path switching control unit is configured such that after the predetermined time has elapsed after the operation switching control unit switches the heat pump system main body from the defrosting operation to the heating operation, the damper moves the air path from the exhaust path. The heat pump system according to claim 1, wherein the damper is controlled to be switched to an air supply path. The heat pump system body includes a blown air temperature sensor for measuring a blown air temperature from the indoor heat exchanger,
The air path switching control unit, when the operation switching control unit switches the heat pump system body from the defrosting operation to the heating operation, when the blown air temperature reaches a predetermined temperature, the damper The heat pump system according to claim 1, wherein the damper is controlled to switch a path from the exhaust path to the air supply path. The heat pump system body includes an outdoor heat exchanger temperature sensor that measures the temperature of the outdoor heat exchanger,
When the temperature of the outdoor heat exchanger reaches a predetermined temperature after the operation switching control unit switches the heat pump system body from the defrosting operation to the heating operation, the air path switching control unit The heat pump system according to claim 1, wherein the damper is controlled to switch the air path from the exhaust path to the air supply path. The heat pump system body includes a pressure sensor that measures the pressure of the refrigerant compressed by the compressor,
When the pressure of the refrigerant compressed by the compressor becomes higher than a predetermined pressure after the operation switching control unit switches the heat pump system main body from the defrosting operation to the heating operation, the air path switching control unit, The heat pump system according to claim 1, wherein the damper controls the damper such that the air path is switched from the exhaust path to the air supply path. When the operation switching control unit switches the heat pump system main body from the defrosting operation to the heating operation, the blower fan increases the rotational speed of the blower fan,
The air path switching control unit controls the damper so that the damper switches the air path from the exhaust path to the air supply path when the rotation speed of the blower fan becomes larger than a predetermined rotation speed. The heat pump system according to claim 1. A compressor that compresses a gaseous refrigerant, an indoor heat exchanger that liquefies the refrigerant compressed by the compressor and dissipates heat of condensation, and an outdoor that absorbs heat of vaporization and vaporizes the liquid refrigerant from the indoor heat exchanger A heat exchanger, a blower fan for blowing air exchanged by the indoor heat exchanger, a duct having an air supply path for guiding the air into the room and an exhaust path for guiding the air to the outside, and a path of the air A control device that controls a heat pump system body including a damper that switches to either the air supply path or the exhaust path,
Either the heating operation in which the indoor heat exchanger dissipates the heat pump system main body and the outdoor heat exchanger absorbs heat, or the defrosting operation in which the indoor heat exchanger absorbs heat and the outdoor heat exchanger dissipates heat An operation switching control unit for switching between
An air path that controls the damper so that the damper guides the air to the air supply path during the heating operation, and controls the damper so that the damper guides the air to the exhaust path during the defrosting operation. A switching control unit,
When the operation switching control unit switches the heat pump system main body from the defrosting operation to the heating operation, the damper switches the air path from the exhaust path with a delay from the operation switching. A control device that controls the damper so as to switch to the air supply path. The control device compresses the gaseous refrigerant, the indoor heat exchanger that liquefies the refrigerant compressed by the compressor and dissipates the heat of condensation, the liquid refrigerant from the indoor heat exchanger that absorbs the heat of vaporization, and An outdoor heat exchanger that vaporizes the air, a blower fan that blows air that has been heat-exchanged by the indoor heat exchanger, a duct having an air supply path that guides the air into the room, and an exhaust path that guides the air to the outdoors, and A control method for controlling a heat pump system main body including a damper that switches a path of air to either the air supply path or the exhaust path,
Either the heating operation in which the indoor heat exchanger dissipates the heat pump system main body and the outdoor heat exchanger absorbs heat, or the defrosting operation in which the indoor heat exchanger absorbs heat and the outdoor heat exchanger dissipates heat An operation switching control step for switching between
An air path that controls the damper so that the damper guides the air to the air supply path during the heating operation, and controls the damper so that the damper guides the air to the exhaust path during the defrosting operation. Switching control step,
In the air path switching control step, the damper switches the air path from the exhaust path to the air supply path behind the switching from the defrosting operation to the heating operation in the operation switching control step. A control method for controlling the damper. A compressor that compresses a gaseous refrigerant, an indoor heat exchanger that liquefies the refrigerant compressed by the compressor and dissipates heat of condensation, and an outdoor that absorbs heat of vaporization and vaporizes the liquid refrigerant from the indoor heat exchanger A heat exchanger, a blower fan for blowing air exchanged by the indoor heat exchanger, a duct having an air supply path for guiding the air into the room and an exhaust path for guiding the air to the outside, and a path of the air To a computer that controls a heat pump system body including a damper that switches to either the air supply path or the exhaust path,
Either the heating operation in which the indoor heat exchanger dissipates the heat pump system main body and the outdoor heat exchanger absorbs heat, or the defrosting operation in which the indoor heat exchanger absorbs heat and the outdoor heat exchanger dissipates heat An operation switching control step for switching between
An air path that controls the damper so that the damper guides the air to the air supply path during the heating operation, and controls the damper so that the damper guides the air to the exhaust path during the defrosting operation. Switching control step, and
In the air path switching control step, the damper switches the air path from the exhaust path to the air supply path behind the switching from the defrosting operation to the heating operation in the operation switching control step. A program for controlling the damper.

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