JP3360430B2 - Heat pump type air conditioner for vehicles - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the present invention.

[0002]

2. Description of the Related Art The flow of refrigerant is reversed by a four-way valve during a heating operation and a cooling operation, and a vehicle exterior heat exchanger (hereinafter referred to as an outdoor unit) is used as a heat absorber during a heating operation. A heat pump type for vehicles that uses a vehicle interior heat exchanger (hereinafter referred to as an indoor unit) as a radiator, and uses an outdoor unit as a radiator and an indoor unit as a heat sink during cooling operation A cooling and heating device is known (for example, see Japanese Patent Application Laid-Open No. 2-290475).

[0003] However, in the above-described conventional heat pump type air conditioner for a vehicle, when the heating operation is performed under climatic conditions such as when the outside air temperature is low, rainfall or snowfall, the amount of heat absorbed in the outdoor unit decreases. There is a problem that the amount of heat radiated in the indoor unit that radiates the total amount of heat absorbed by the outdoor unit and the work amount of the compressor decreases, and the heating capacity decreases. Further, under such climatic conditions, a frosting phenomenon is likely to occur, and the number of times of defrost operation may increase, and the heating operation may become unstable. Also, since the flow of the refrigerant is reversed between the cooling operation and the heating operation,
Both the outdoor unit side and the indoor unit side pipes need to be able to withstand high temperature and high pressure, and there is a problem that the cost is high. Furthermore, during heating operation, waste air from the engine is used to generate warm air for heating the interior of the vehicle, which is not suitable for vehicles that do not have a large heat source, such as solar cars and electric cars.

An object of the present invention is to provide an inexpensive heat pump type air conditioner for a vehicle having a stable air conditioner capacity.

[0005]

In order to achieve the above object, the present invention is directed to a compressor for compressing a refrigerant, a heat exchanger outside a vehicle compartment for exchanging heat between the refrigerant and the outside air, and a refrigerant. A heat exchanger for radiating heat to the air blown by the blower means, an expansion valve for adiabatically expanding the refrigerant flowing out of the heat exchanger for heat dissipation, and the air blown by the blower means A heat absorbing vehicle interior heat exchanger that absorbs the heat of the refrigerant into the refrigerant flowing out of the expansion valve and sends the refrigerant to the refrigerant suction side of the compressor, and the refrigerant discharged from the compressor through the vehicle exterior heat exchanger. A first flow path for supplying the heat release vehicle interior heat exchanger, and a second flow path for supplying the refrigerant discharged from the compressor to the heat release vehicle interior heat exchanger bypassing the external heat exchanger. Inside the heat exchanger outside the vehicle compartment A third flow path for recovering the stopped refrigerant to a refrigerant suction side of the compressor, flow path switching means for switching a refrigerant flow path, a cooling operation mode for performing cooling by the first flow path, Heating operation mode A in which heating is performed only by the second flow path, and heating operation mode B in which heating is performed by the second flow path and the third flow path
Control means for switching the refrigerant flow path by the flow path switching means according to the operation mode, wherein the control means selects the heating operation mode B in an initial state after the start of the heating operation, and After a lapse of time, the heating operation mode A is selected. The invention according to claim 2 is a compressor that compresses a refrigerant, a vehicle exterior heat exchanger that exchanges heat between the refrigerant and the outside air, and a heat radiation vehicle interior that radiates heat of the refrigerant to air blown by blowing means. A heat exchanger; first and second expansion valves for adiabatically expanding the refrigerant flowing out of the heat-radiating vehicle interior heat exchanger; and heat of the air blown by the blowing means flowing out of the first expansion valve. A heat-absorbing vehicle interior heat exchanger that absorbs heat from the compressed refrigerant and sends the refrigerant to the refrigerant suction side of the compressor; and a refrigerant discharged from the compressor to the heat-radiating vehicle interior heat exchanger via the external heat exchanger. A first flow path to be supplied, a second flow path to supply the refrigerant discharged from the compressor to the heat radiation interior heat exchanger bypassing the exterior heat exchanger, and a second flow path. Pass the heat exchanger through the exterior heat exchanger A fourth flow path for flowing a refrigerant to a refrigerant suction side of the presser, a flow path switching means for switching a refrigerant flow path, a cooling operation mode for performing cooling by the first flow path; A heating operation mode A in which heating is performed only by the road; and a heating operation mode C in which heating is performed by the second flow path and the fourth flow path. Control means for switching the refrigerant flow path. According to a third aspect of the present invention, in the heat pump type cooling and heating device for a vehicle, the control unit selects the heating operation mode C in an initial state after the start of the heating operation. In the heat pump type cooling / heating device for a vehicle according to claim 4, the heating operation mode C is selected by the control means if heat can be absorbed by the external heat exchanger after the initial state of the heating operation, and if not, Is such that the heating operation mode A is selected.
The invention according to claim 5 is a compressor that compresses a refrigerant,
An external heat exchanger that exchanges heat between the refrigerant and the outside air,
A heat-radiating vehicle interior heat exchanger that radiates heat of the refrigerant to the air blown by the blowing means, first and second expansion valves that adiabatically expand the refrigerant flowing out of the heat-radiating vehicle interior heat exchanger, The heat of the air blown by the blowing means is transferred to the first
A heat-absorbing vehicle interior heat exchanger that absorbs heat from the refrigerant flowing out of the expansion valve and sends the refrigerant to the refrigerant suction side of the compressor; and the heat-dissipating vehicle discharges refrigerant from the compressor through the vehicle exterior heat exchanger. A first flow path for supplying the indoor heat exchanger, a second flow path for supplying the refrigerant discharged from the compressor to the heat-dissipating interior heat exchanger by bypassing the exterior heat exchanger, and A third flow path for collecting the refrigerant stagnating in the outdoor heat exchanger to the refrigerant suction side of the compressor; and a refrigerant flowing from the second expansion valve to the compressor suction side through the vehicle exterior heat exchanger. A flow path switching means for switching a refrigerant flow path, a cooling operation mode for performing cooling by the first flow path, and a heating operation for heating only by the second flow path; Mode A,
A heating operation mode B in which heating is performed by the second flow path and the third flow path, and a heating operation mode C in which heating is performed by the second flow path and the fourth flow path. And control means for switching the refrigerant flow path by the flow path switching means according to the operation mode. The heat pump type cooling / heating device for a vehicle according to claim 6, wherein in the initial state after the start of the heating operation, the control unit selects the heating operation mode C when the outside air temperature is higher than a predetermined value; The heating operation mode B is selected.
8. The vehicle heat pump cooling and heating apparatus according to claim 7, wherein after the initial state of the heating operation, when the outside air temperature is lower than the predetermined value, the heating operation mode A is selected by the control means, and the outside air temperature is set to the predetermined value. If the temperature is higher and the heat can be absorbed by the outside heat exchanger, the heating operation mode C is selected.If the outside air temperature is higher than the predetermined value and the heat can not be absorbed by the outside heat exchanger, The heating operation mode B is selected. The heat pump type cooling / heating device for a vehicle according to claim 8, wherein a refrigerant flowing side from the refrigerant suction side of the compressor to the refrigerant outflow side of the heat absorbing vehicle interior heat exchanger blocks the flow of refrigerant from the refrigerant absorbing side to the heat absorbing vehicle interior heat exchanger. A stop valve is provided. The invention according to claim 9 is a compressor that compresses a refrigerant, a vehicle exterior heat exchanger that exchanges heat between the refrigerant and the outside air, and a heat radiation vehicle interior that radiates heat of the refrigerant to the air blown by the blowing means. A heat exchanger, a two-way valve connected to one refrigerant inlet / outlet of the heat-radiating vehicle interior heat exchanger, and a refrigerant connected from the two-way valve in parallel and flowing out of the heat-radiating vehicle interior heat exchanger. A first expansion valve for adiabatic expansion, and a second expansion valve connected to the other refrigerant inlet / outlet of the heat dissipation vehicle interior heat exchanger for adiabatically expanding the refrigerant flowing out of the heat dissipation vehicle interior heat exchanger, A heat-absorbing vehicle interior heat exchanger that is connected to the refrigerant outflow side of the second expansion valve and absorbs the heat of the air blown by the blowing means into the refrigerant, and is connected in parallel to the second expansion valve; From the heat absorbing interior heat exchanger to the heat releasing interior heat exchanger A check valve that allows a flow of refrigerant, a first flow path that supplies refrigerant discharged from the compressor to the two-way valve and the first expansion valve via the exterior heat exchanger, and the compressor A second flow path for supplying the refrigerant discharged from the compressor to the two-way valve and the first expansion valve bypassing the external heat exchanger, and the heat exchanger for absorbing the refrigerant discharged from the compressor. A flow path switching means for switching a refrigerant flow path, and switching to the first flow path by the flow path switching means, so that refrigerant discharged from the compressor is exchanged with heat outside the vehicle compartment. A cooling operation mode for supplying to the compressor via a heat exchanger, the two-way valve, the heat-radiating vehicle interior heat exchanger, the second expansion valve, and the heat-absorbing vehicle interior heat exchanger; Switching to the second flow path, the compressor The two-way valve the discharge refrigerant of the heat-radiating inner heat exchanger, the second expansion valve, the heating operation mode A is supplied via said heat-absorbing inner heat exchanger to the compressor
Switching the refrigerant to the fifth flow path by the flow path switching means, and discharging the refrigerant discharged from the compressor to the heat absorbing vehicle interior heat exchanger, the check valve, the heat releasing vehicle interior heat exchanger, A heating operation mode D for supplying to the compressor via the expansion valve and the exterior heat exchanger; and control means for switching the refrigerant flow path by the flow path switching means according to the operation mode.

[0006]

In the cooling operation mode, the refrigerant discharged from the compressor is supplied to the heat-radiating vehicle interior heat exchanger through the vehicle exterior heat exchanger, and the refrigerant refrigerant absorption side of the compressor is transmitted through the expansion valve and the heat-absorbing vehicle interior heat exchanger. In this mode, the refrigerant is recovered. At this time, the conditioned air is cooled mainly by radiating heat from the vehicle exterior heat exchanger to the outside air and absorbing heat from the conditioned air by the heat absorbing vehicle interior heat exchanger. In the heating operation mode A, the refrigerant discharged from the compressor bypasses the exterior heat exchanger and is supplied to the heat radiation interior heat exchanger, and the refrigerant absorbs refrigerant through the expansion valve and the heat absorption interior heat exchanger. This is a mode for collecting the refrigerant to the side. At this time, the heat of the high-temperature refrigerant discharged from the compressor is radiated to the conditioned air from the radiating vehicle interior heat exchanger to warm the conditioned air. The heating operation mode B is a mode in which heating is performed in the same refrigerant flow path as in the above-described mode A while collecting the refrigerant from the exterior heat exchanger to the refrigerant suction side of the compressor. Further, in the operation mode C, the refrigerant discharged from the compressor is supplied to the heat-radiating vehicle interior heat exchanger bypassing the vehicle exterior heat exchanger, and is supplied to the compressor via the first expansion valve and the heat-absorbing vehicle interior heat exchanger. The refrigerant is recovered to the refrigerant heat absorption side, and the refrigerant is recovered from the second expansion valve to the refrigerant suction side of the compressor through the exterior heat exchanger. At this time, the heat of the high-temperature refrigerant discharged from the compressor is radiated from the radiating vehicle interior heat exchanger to the conditioned air to warm the conditioned air, and heat is absorbed from the conditioned air by the heat absorbing vehicle interior heat exchanger, so that the outside of the vehicle is removed. Heat is absorbed from outside air by the heat exchanger. The vehicle heat pump type cooling and heating device according to the first aspect has a cooling operation mode, a heating operation mode A, and a heating operation mode B, and switches the refrigerant flow path according to the operation mode. In the initial state after the start of the heating operation, the heating operation mode B is selected, and after a predetermined time, the heating operation mode A is selected. The vehicle heat pump type cooling and heating device according to claims 2 to 4 has a cooling operation mode, a heating operation mode A, and a heating operation mode C, and switches the refrigerant flow path according to the operation mode. In the initial state after the start of the heating operation, it is preferable to select the heating operation mode C. Further, after the initial state of the heating operation, it is preferable to select the heating operation mode C when heat can be absorbed by the heat exchanger outside the vehicle compartment, and otherwise to select the heating operation mode A. The vehicle heat pump type cooling and heating device according to claims 5 to 7 has a cooling operation mode, a heating operation mode A, a heating operation mode B and a heating operation mode C, and switches the refrigerant flow path according to the operation mode. In the initial state after the start of the heating operation, if the outside air temperature is higher than a predetermined value, the heating operation mode C
Is selected, otherwise the heating operation mode B is preferably selected. After the initial state of the heating operation, if the outside air temperature is lower than the predetermined value, the heating operation mode A is selected. If the outside air temperature is higher than the predetermined value and heat can be absorbed by the vehicle exterior heat exchanger, the heating operation is performed. It is preferable to select the mode C and select the heating operation mode B when the outside air temperature is higher than a predetermined value and the heat absorption by the outside heat exchanger is impossible. In the heat pump type cooling and heating device for a vehicle according to the eighth aspect, the check valve prevents the flow of the refrigerant from the refrigerant suction side of the compressor to the heat absorbing vehicle interior heat exchanger. In the heat pump type cooling / heating device for a vehicle according to the ninth aspect, in the heating operation in the mode D, the flow of the refrigerant is opposite to that in the mode A, and the refrigerant also flows to the outside heat exchanger.

[0007]

【Example】

First Embodiment FIGS. 1 and 2 show the overall configuration of the first embodiment, and FIG.
Shows the configuration of the refrigeration cycle. Note that illustration of control lines from sensors, actuators, and the like to the control device is omitted to avoid complicating the drawing. This vehicle heat pump type air conditioner includes a compressor 31, an outdoor unit (external heat exchanger) 38, a heat radiating indoor heat exchanger (hereinafter referred to as a radiator) 33, a liquid tank 36, an expansion valve 34,
A refrigeration cycle equipped with a heat absorbing vehicle interior heat exchanger (hereinafter referred to as a heat absorbing device) 35 and various valves;
The air conditioner includes an air-conditioning duct 39 that sends air to the radiator 33 and the heat absorber 35 to send air-conditioned air into the vehicle interior, and a control device 43 that controls a cooling and heating device. Compressor 31
Is a compressor of an electric type, a hydraulic drive type, or the like that can control the amount of work by an external signal, and is provided outside the vehicle compartment, for example, in an engine room. The outdoor unit 38 radiates heat of the refrigerant discharged from the compressor 31 to the outside air,
A condenser that flows low-temperature refrigerant and absorbs heat from the outside air.
It is provided outside the cabin.

[0008] An air conditioning duct 39 is provided behind the instrument panel at the front of the vehicle cabin. A radiator 33 and a heat absorber 35 are provided in the air conditioning duct 39. The radiator 33 is a condenser for radiating heat of the high-temperature refrigerant discharged from the compressor 31 to the air blown by the blower fan 37, and the heat absorber 35 absorbs the heat of the air blown by the blower fan 37 to the refrigerant. It is an evaporator. A liquid tank 36 and an expansion valve 34 are provided between the radiator 33 and the heat absorber 35. The liquid tank 36 separates the refrigerant from gas and liquid, and the expansion valve 34 adiabatically expands the liquefied refrigerant to vaporize it. Therefore, the area from the discharge side of the compressor 31 to the expansion valve 34 is called the high pressure side of the refrigeration cycle, and the area from the expansion valve 34 to the refrigerant suction side of the compressor 31 is called the low pressure side of the refrigeration cycle.

On the upstream side of the duct 39, there are provided an inside air inlet 40 for introducing the air in the passenger compartment and an outside air inlet 41 for receiving the running wind to introduce the outside air. Further, an intake door 42 driven by an actuator (not shown) is provided at a branch portion of these inlets 40 and 41, and the inside air inlet 40 and the outside air inlet 41 are adjusted to an arbitrary opening / closing ratio. Blower fan 3 installed upstream of duct 39
7 is driven by a blower motor 44 to introduce air from the inside air inlet 40 and the outside air inlet 41 in accordance with the opening / closing ratio of the intake door 42 and send air to the heat absorber 35 and the radiator 33 arranged downstream of the duct 39. I do. Radiator 3
An air mix door 46 is provided upstream of 3.
The air mix door 46 is opened and closed by an actuator (not shown), and the air passing through the radiator 33 and the radiator 33 are opened.
The ratio with the air bypassing is adjusted. A part of the air cooled by the heat absorption by the heat absorber 35 passes through the radiator 33 and is heated according to the opening degree of the air mix door 46, and the rest is blown out as cool air by bypassing the radiator 33. You.

An air mix chamber 47 is provided downstream of the air mix door 46 of the duct 39, where cold air and hot air are mixed to produce temperature-controlled conditioned air. Downstream of the air mix chamber 47, a ventilator outlet 51 that blows out conditioned air toward the upper body of the occupant, a foot outlet 52 that blows out conditioned air toward the feet of the occupant, and blows out conditioned air toward the windshield. A defroster outlet 53 is provided, and a ventilator door 55, a foot door 56, and a defroster door 57 are respectively provided at the outlets 51 to 53.
And an actuator (not shown) for driving each door. The ventilator outlet 51 is provided at the center of the vehicle instrument at the center vent outlet 5.
1b and 51c and side vent outlets 51a and 51d are provided on both sides of the instrument.

The control device 43 includes a microcomputer, a memory, an A / D converter, an actuator drive circuit,
Various sensors 5 composed of interface circuits, etc.
8 to 60, 67, a room temperature setting device 64, an outlet mode switch 65 for switching the outlet, a blower fan switch 66, a blower motor 44, each door actuator, the compressor 31, various refrigerant flow switching valves, and the like. You. The control device 43 calculates target cooling and heating conditions such as an air mix door opening and a target blow-out air temperature based on the thermal environment information from the sensors and the setting device, and controls the compressor 31 and the blower so that the vehicle interior has the target cooling and heating conditions. Motor 44, various refrigerant flow switching valves,
It controls actuators of each door.

The refrigeration cycle of the first embodiment will be described with reference to FIG. The refrigeration cycle of the first embodiment includes the above-described compressor 31, outdoor unit 38, radiator 33, and heat absorber 35, a four-way valve 101 for switching a refrigerant flow path according to an operation mode, a two-way valve 170, and a reverse valve. Stop valves 70, 16
0 is provided. The refrigerant discharge side of the compressor 31 is connected to the four-way valve 101, and the four-way valve 101 switches the refrigerant flow path according to the operation mode. Four-way valve 101
Are connected to three refrigerant flow paths. The first refrigerant flow path includes the two-way valve 170, the outdoor unit 38, and the check valve 70.
The second flow path is a heating flow path that reaches the radiator 33 through the bypass flow path 150 and the check valve 160. Further, the third flow path is a flow path for refrigerant recovery that reaches the suction side of the compressor 31 through the flow path 151. The check valve 70 prevents the flow of the refrigerant from the radiator 33 to the outdoor unit 38 in the first flow path, and the check valve 160 controls the flow of the refrigerant from the radiator 33 to the four-way valve 101 in the second flow path. To block. In the first embodiment, the four-way valve 101, the two-way valve 170 and the check valves 70 and 160 constitute a flow path switching means, the blower fan 37 constitutes a blowing means, and the control device 43 constitutes a control means. .

In the first embodiment, a cooling operation mode and
There are a heating operation mode A and a heating operation mode B, and the refrigerant flow path is switched by the four-way valve 101 and the two-way valve 170 according to each operation mode. (1) Cooling operation mode In the cooling operation mode, the four-way valve 101 is switched to the broken line side, and the two-way valve 170 is opened. That is, the refrigerant discharge side of the compressor 31 is connected to the above-described first flow path for cooling, and the bypass flow path 150 is connected to the third flow path 15 for refrigerant recovery.
Connect to 1. Thereby, the refrigerant flow path of the compressor 31 → the four-way valve 101 → the two-way valve 170 → the outdoor unit 38 → the check valve 70 → the radiator 33 → the heat absorber 35 → the compressor 31 is formed, and the refrigerant discharged from the compressor 31 The heat is mainly radiated from the outdoor unit 38 to the outside air, and the blower fan 3
The heat of the air blown by 7 is absorbed by the heat absorber 35 to produce cool air. Immediately after switching from the heating operation to the cooling operation, a large amount of refrigerant remains in the bypass passage 150 for heating. The refrigerant stagnating in the bypass flow path 150 is recovered to the suction side of the compressor 31 through the four-way valve 101 and the flow path 151, and a sufficient amount of the refrigerant is secured during the cooling operation, and the high cooling capacity is maintained. can do.

(2) Heating operation mode A In the heating operation mode A, the four-way valve 101 is switched to the side shown by the solid line, and the two-way valve 170 is closed. That is, the refrigerant discharged from the compressor 31 is connected to the above-described second flow path for heating. Thereby, the compressor 31 → the four-way valve 1
01 → bypass channel 150 → check valve 160 → radiator 33
→ The heat absorber 35 → The refrigerant flow path of the compressor 31 is formed, and the heat of the refrigerant discharged from the compressor 31 is radiated from the radiator 33 to the air blown by the blower fan 37 to generate warm air.

(3) Heating operation mode B In the heating operation mode B, the four-way valve 101 is switched to the side shown by the solid line, and the two-way valve 170 is opened. Therefore, in the heating operation mode B, a heating channel similar to that of the mode A described above is formed, and the outdoor unit 38 is further connected to the refrigerant recovery channel 151 via the two-way valve 170. This allows
As in the case of the heating operation mode A, hot air is produced,
Further, the refrigerant remaining in the outdoor unit 38 is recovered to the suction side of the compressor 31. Immediately after switching from the cooling operation to the heating operation, a large amount of refrigerant remains in the outdoor unit 38. Therefore, when switching from the cooling operation to the heating operation, first, the mode B heating operation is performed, and the useless refrigerant remaining in the outdoor unit 38 is collected in the refrigeration cycle, and a sufficient amount of the refrigerant is secured after the heating operation is started. In addition to improving the heating capacity, the mode is switched to the heating operation in mode A, and the outdoor unit 38, which is easily affected by outside air, is separated from the refrigeration cycle, so that a stable high heating capacity can be obtained.

FIG. 4 shows the configuration of a refrigeration cycle according to a second embodiment. The entire configuration of the second embodiment is the same as that of the first embodiment shown in FIGS. 1 and 2 except for the refrigerating cycle, and a description thereof will be omitted. The same devices as those in the first embodiment are denoted by the same reference numerals, and the description will focus on the differences. Second
The refrigeration cycle of this embodiment includes two-way valves 180 and 181 for switching the refrigerant flow path according to the operation mode. Two refrigerant channels are connected to the refrigerant discharge side of the compressor 31. The first refrigerant flow path is a cooling flow path that reaches the radiator 33 through the two-way valve 180, the outdoor unit 38, and the check valve 70, and the second refrigerant flow path is a two-way valve 181, a bypass flow path. This is a heating channel that passes through 150 to the radiator 33. Note that, when the two-way valve 182 is opened during the heating operation, a refrigerant recovery flow path from the outdoor unit 38 to the suction side of the compressor 31 through the flow path 151 is formed. Check valve 7
0 prevents the flow of the refrigerant from the radiator 33 to the outdoor unit 38 in the first flow path. In the second embodiment, the two-way valves 180 to 182 and the check valve 70 serve as flow passage switching means, the blower fan 37 serves as a blower, and the controller 43
Constitute the control means.

In the second embodiment, a cooling operation mode and
There are a heating operation mode A and a heating operation mode B, and the refrigerant flow path is switched by the two-way valves 180 to 182 according to each operation mode. (1) Cooling operation mode In the cooling operation mode, the two-way valve 180 is opened and the two-way valve 1 is opened.
81 and 182 are closed. That is, the compressor 3
1 is connected to the cooling channel described above. Thereby, the compressor 31 → the two-way valve 180 → the outdoor unit 3
8 → check valve 70 → radiator 33 → heat absorber 35 → refrigerant flow path of compressor 31 is formed, heat of the refrigerant discharged from compressor 31 is mainly radiated from outdoor unit 38 to the outside air, and blower fan 37 The heat of the blown air is absorbed by the heat absorber 35 to produce cool air.

(2) Heating operation mode A In the heating operation mode A, the two-way valve 181 is opened and the two-way valves 180 and 182 are closed. That is, the refrigerant discharge side of the compressor 31 is connected to the above-described heating channel. Thereby, a refrigerant flow path of the compressor 31 → the two-way valve 181 → the bypass flow path 150 → the radiator 33 → the heat sink 35 → the compressor 31 is formed, and the heat of the refrigerant discharged from the compressor 31 by the radiator 33 is blower fan. Heat is radiated to the air blown by 37 to produce warm air.

(3) Heating operation mode B In the heating operation mode B, the two-way valves 181 and 182 are opened and the two-way valve 180 is closed. Therefore, in this heating operation mode B, a heating channel similar to that in mode A described above is formed, and the outdoor unit 38 is further connected to the channel 151 via the two-way valve 182. As a result, as in the case of the heating operation mode A, warm air is produced, and the refrigerant remaining in the outdoor unit 38 is further recovered to the suction side of the compressor 31. Immediately after switching from the cooling operation to the heating operation, a large amount of refrigerant remains in the outdoor unit 38. Therefore, when switching from the cooling operation to the heating operation, first, the mode B heating operation is performed, and the useless refrigerant remaining in the outdoor unit 38 is collected in the refrigeration cycle, and a sufficient amount of the refrigerant is secured after the heating operation is started. In addition to improving the heating capacity, the mode is switched to the heating operation in mode A, and the outdoor unit 38, which is easily affected by outside air, is separated from the refrigeration cycle, so that a stable high heating capacity can be obtained.

Third Embodiment FIG. 5 shows a configuration of a refrigeration cycle according to a third embodiment. The entire configuration of the third embodiment is the same as that of the first embodiment shown in FIGS. 1 and 2 except for the refrigeration cycle, and a description thereof will be omitted. The same devices as those in the first embodiment are denoted by the same reference numerals, and the description will focus on the differences. The refrigeration cycle of the third embodiment is the same as the refrigeration cycle of the second embodiment shown in FIG. 4 except that the flow path for refrigerant recovery is different. In the second embodiment, the two-way valve 180 and the outdoor unit 38
Is the starting point of the refrigerant recovery flow path.
In this embodiment, a connection point between the outdoor unit 38 and the check valve 70 is set as a starting point, and a refrigerant recovery flow path is formed from the connection point through the two-way valve 182 and the flow path 151 to the suction side of the compressor 31. . The operation mode and operation of the third embodiment are the same as those of the second embodiment, and the description is omitted. Note that this third
In this embodiment, the two-way valves 180 to 182 and the check valve 70 constitute flow passage switching means, the blower fan 37 constitutes air blowing means, and the control device 43 constitutes control means.

Fourth Embodiment FIG. 6 shows the configuration of a refrigeration cycle according to a fourth embodiment. The entire configuration of the fourth embodiment is the same as that of the first embodiment shown in FIGS. 1 and 2 except for the refrigerating cycle, and a description thereof will be omitted. The same devices as those in the first embodiment are denoted by the same reference numerals, and the description will focus on the differences. The refrigeration cycle of the fourth embodiment is different from the refrigeration cycle of the first embodiment shown in FIG. 3 in that the outdoor unit 38 is checked against the refrigerant outflow side of the liquid tank 36 via the expansion valve 190 and the check valve 162. A flow path to a connection point of the valve 70 is provided. Check valve 1
62 blocks the flow of the refrigerant from the outdoor unit 38 to the expansion valve 190. In the fourth embodiment, the expansion valve 34
Is the first expansion valve, the expansion valve 190 is the second expansion valve, the four-way valve 101, the two-way valve 170, and the check valves 70, 160,
162 constitutes a flow path switching means, the blower fan 37 constitutes a blowing means, and the control device 43 constitutes a control means.

In the fourth embodiment, a cooling operation mode and
There are a heating operation mode A and a heating operation mode C, and the refrigerant flow path is switched by the four-way valve 101 and the two-way valve 170 according to each operation mode. (1) Cooling operation mode In the cooling operation mode, the four-way valve 101 is switched to the broken line side, and the two-way valve 170 is opened. That is, the refrigerant discharge side of the compressor 31 is connected to the above-described cooling channel, and the bypass channel 150 and the channel 151 are communicated. Thereby, the compressor 31 → the four-way valve 101 → the two-way valve 170
→ outdoor unit 38 → check valve 70 → radiator 33 → heat absorber 35 →
A refrigerant flow path of the compressor 31 is formed, heat of the refrigerant discharged from the compressor 31 is mainly radiated to the outside air from the outdoor unit 38, and heat of the air blown by the blower fan 37 is absorbed by the heat absorber 35 to produce the cool air. make. Immediately after switching from the heating operation to the cooling operation, a large amount of refrigerant remains in the bypass passage 150 for heating. The refrigerant stagnating in such a bypass passage 150 is a four-way valve 1
01, and is recovered to the suction side of the compressor 31 through the flow path 151, a sufficient amount of refrigerant is secured during cooling operation, and high cooling capacity can be maintained.

(2) Heating operation mode A In the heating operation mode A, the four-way valve 101 is switched to the side shown by the solid line, and the two-way valve 170 is closed. That is, the refrigerant discharge side of the compressor 31 is switched to the above-described heating channel. Thereby, the compressor 31 → the four-way valve 10
1 → bypass channel 150 → check valve 160 → radiator 33 →
A refrigerant flow path from the heat absorber 35 to the compressor 31 is formed, and the heat of the refrigerant discharged from the compressor 31 is radiated from the radiator 33 to the air blown by the blower fan 37 to generate warm air.

(3) Heating operation mode C In the heating operation mode C, the four-way valve 101 is switched to the side shown by the solid line, and the two-way valve 170 is opened. That is, in the heating operation mode C, a heating flow path similar to that of the above-described mode A is formed, and further, an auxiliary heat absorption refrigerant flow path for operating the outdoor unit 38 as a heat absorber is formed. This auxiliary heat absorbing flow path is provided by the liquid tank 36 → the expansion valve 190 → the check valve 162 → the outdoor unit 38 → the two-way valve 170 → the four-way valve 101 →
The flow path from the flow path 151 to the compressor 31. The high-temperature refrigerant discharged from the compressor 31 is radiated by the radiator 33 to generate warm air, and then diverted to the heat absorber 35 and the auxiliary heat absorbing flow path, where heat is absorbed by both the heat absorber 35 and the outdoor unit 38. Is performed. Therefore, under the environmental conditions in which heat can be absorbed from the outside air, the heating operation can be performed in the mode C to increase the heating capacity more than in the mode A.

Fifth Embodiment FIG. 7 shows a configuration of a refrigeration cycle according to a fifth embodiment. The overall configuration of the fifth embodiment is the same as that of the first embodiment shown in FIGS. 1 and 2 except for the refrigerating cycle, and a description thereof will be omitted. The same devices as those in the first embodiment are denoted by the same reference numerals, and the description will focus on the differences. The refrigeration cycle of the fifth embodiment is the same as the refrigeration cycle of the second embodiment shown in FIG. 4 except that a refrigerant passage for auxiliary heat absorption shown in FIG. 6 is provided. In the fifth embodiment, the expansion valve 34 is the first expansion valve, and the expansion valve 190 is the second expansion valve.
Of the two-way valves 180 to 182 and the check valve 70,
162 constitutes a flow path switching means, the blower fan 37 constitutes a blowing means, and the control device 43 constitutes a control means.

In the fifth embodiment, a cooling operation mode and
There are a heating operation mode A and a heating operation mode C, and the refrigerant flow path is switched by the two-way valves 180 to 182 according to each operation mode. (1) Cooling operation mode In the cooling operation mode, the two-way valve 180 is opened and the two-way valve 1 is opened.
81 and 182 are closed. That is, the compressor 3
1 is connected to the cooling channel described above. Thereby, the compressor 31 → the two-way valve 180 → the outdoor unit 3
8 → check valve 70 → radiator 33 → heat absorber 35 → refrigerant flow path of compressor 31 is formed, heat of the refrigerant discharged from compressor 31 is mainly radiated from outdoor unit 38 to the outside air, and blower fan 37 The heat of the blown air is absorbed by the heat absorber 35 to produce cool air.

(2) Heating operation mode A In the heating operation mode A, the two-way valve 181 is opened and the two-way valves 180 and 182 are closed. That is, the refrigerant discharge side of the compressor 31 is connected to the above-described heating channel. As a result, a compressor 31 → a two-way valve 181 → a bypass flow path 150 → a radiator 33 → a heat sink 35 → a refrigerant flow path of the compressor 31 is formed, and the heat of the refrigerant discharged from the compressor 31 is transferred from the radiator 33 to the blower fan. 37
Heat is dissipated to the air blown by this to create warm air.

(3) Heating operation mode C In the heating operation mode C, the two-way valves 181 and 182 are opened and the two-way valve 180 is closed. That is, in the heating operation mode C, a heating channel similar to that of the above-described mode A is formed, and further, the above-described auxiliary heat absorbing channel for operating the outdoor unit 38 as a heat absorber is formed. The high-temperature refrigerant discharged from the compressor 31 is radiated by the radiator 33 to generate warm air, and then diverted to the heat absorber 35 and the auxiliary heat absorbing flow path, where heat is absorbed by both the heat absorber 35 and the outdoor unit 38. Is performed. Therefore, under the environmental conditions in which heat can be absorbed from the outside air, the heating operation can be performed in the mode C to increase the heating capacity more than in the mode A.

Sixth Embodiment FIG. 8 shows a configuration of a refrigeration cycle according to a sixth embodiment. The overall configuration of the sixth embodiment is the same as that of the first embodiment shown in FIGS. 1 and 2 except for the refrigeration cycle, and a description thereof will be omitted. The same devices as those in the first embodiment are denoted by the same reference numerals, and the description will focus on the differences. The refrigeration cycle of the sixth embodiment is a modification of the refrigeration cycle of the fifth embodiment shown in FIG. That is, from the refrigerant outflow side of the liquid tank 36, the expansion valve 1
90 and a check valve 162 to the outdoor unit 38, and a connection point between the outdoor unit 38 and the check valve 70 to a suction side of the compressor 31 via a two-way valve 182. Check valve 16
2 blocks the flow of the refrigerant from the outdoor unit 38 to the expansion valve 190. In the sixth embodiment, the expansion valve 34 serves as a first expansion valve, the expansion valve 190 serves as a second expansion valve, and the two-way valves 180 to 182 and the check valves 70 and 162 serve as flow switching means. And the blower fan 37 controls
Constitute the control means.

In the sixth embodiment, the cooling operation mode includes:
There are a heating operation mode A and a heating operation mode C, and the refrigerant flow path is switched by the two-way valves 180 to 182 according to each operation mode. (1) Cooling operation mode In the cooling operation mode, the two-way valve 180 is opened and the two-way valve 1 is opened.
81 and 182 are closed. That is, the compressor 3
1 is connected to the cooling channel described above. Thereby, the compressor 31 → the two-way valve 180 → the outdoor unit 3
8 → check valve 70 → radiator 33 → heat absorber 35 → refrigerant flow path of compressor 31 is formed, heat of the refrigerant discharged from compressor 31 is mainly radiated from outdoor unit 38 to the outside air, and blower fan 37 The heat of the blown air is absorbed by the heat absorber 35 to produce cool air.

(2) Heating operation mode A In the heating operation mode A, the two-way valve 181 is opened and the two-way valves 180 and 182 are closed. That is, the refrigerant discharge side of the compressor 31 is connected to the above-described heating channel. As a result, a compressor 31 → a two-way valve 181 → a bypass flow path 150 → a radiator 33 → a heat sink 35 → a refrigerant flow path of the compressor 31 is formed, and the heat of the refrigerant discharged from the compressor 31 is transferred from the radiator 33 to the blower fan. 37
Heat is dissipated to the air blown by this to create warm air.

(3) Heating operation mode C In the heating operation mode C, the two-way valves 181 and 182 are opened and the two-way valve 180 is closed. Therefore, in the heating operation mode C, a heating flow path similar to that of the above-described mode A is formed, and further, an auxiliary heat absorption refrigerant flow path for operating the outdoor unit 38 as a heat absorber is formed. The auxiliary heat absorbing refrigerant flow path is a flow path of the liquid tank 36 → the expansion valve 190 → the check valve 162 → the outdoor unit 38 → the two-way valve 182 → the compressor 31. The high-temperature refrigerant discharged from the compressor 31 is radiated by the radiator 33 to generate warm air, and then diverted to the heat absorber 35 and the auxiliary heat absorbing channel, and is radiated by both the heat absorber 35 and the outdoor unit 38. Endotherm is performed. Therefore, under the environmental conditions in which heat can be absorbed from the outside air, the heating operation can be performed in the mode C to increase the heating capacity more than in the mode A.

Seventh Embodiment FIG. 9 shows a configuration of a refrigeration cycle according to a seventh embodiment. Note that the overall configuration of the seventh embodiment is the same as that of the first embodiment shown in FIGS. 1 and 2 except for the refrigeration cycle, and a description thereof will be omitted. The same devices as those in the first embodiment are denoted by the same reference numerals, and the description will focus on the differences. In the refrigeration cycle of the seventh embodiment, the check valve 162 of the refrigeration cycle of the fourth embodiment shown in FIG. In the seventh embodiment, the expansion valve 34 serves as the first expansion valve, the expansion valve 190 serves as the second expansion valve, and the four-way valves 101, the two-way valves 170 and 183, and the check valves 70 and 160. The flow path switching means, the blower fan 37 constitutes a blowing means, and the control device 43 constitutes a control means.

In the seventh embodiment, a cooling operation mode and
There are a heating operation mode A, a heating operation mode B, and a heating operation mode C, and the refrigerant flow path is switched by the four-way valve 101 and the two-way valves 170 and 183 according to each operation mode. (1) Cooling operation mode In the cooling operation mode, the four-way valve 101 is switched to the broken line side, the two-way valve 170 is opened, and the two-way valve 183 is closed.
That is, the refrigerant discharge side of the compressor 31 is connected to the cooling passage described above, and the bypass passage 150 and the passage 151 are connected.
To communicate. Thereby, the refrigerant flow path of the compressor 31 → the four-way valve 101 → the two-way valve 170 → the outdoor unit 38 → the check valve 70 → the radiator 33 → the heat absorber 35 → the compressor 31 is formed, and the refrigerant discharged from the compressor 31 Heat is mainly radiated from the outdoor unit 38 to the outside air, and the blower fan 37
The heat of the air blown by the above is absorbed by the heat absorber 35 to produce cool air. Immediately after switching from the heating operation to the cooling operation, a large amount of refrigerant remains in the bypass passage 150 for heating. The refrigerant stagnating in the bypass flow path 150 is recovered to the suction side of the compressor 31 through the four-way valve 101 and the flow path 151, and a sufficient amount of the refrigerant is secured during the cooling operation, and the high cooling capacity is maintained. can do.

(2) Heating operation mode A In the heating operation mode A, the four-way valve 101 is switched to the side shown by the solid line, and the two-way valves 170 and 183 are closed. That is, the refrigerant discharge side of the compressor 31 is switched to the above-described heating channel. As a result, the compressor 31 →
A four-way valve 101 → a bypass flow path 150 → a check valve 160 → a radiator 33 → a heat absorber 35 → a refrigerant flow path of the compressor 31 is formed, and the heat of the refrigerant discharged from the compressor 31 is transmitted from the radiator 33 to the blower fan 37. Heat is released to the blown air to create warm air.

(3) Heating operation mode B In the heating operation mode C, the four-way valve 101 is switched to the side shown by the solid line, the two-way valve 170 is opened, and the two-way valve 183 is closed. That is, in the heating operation mode B, a heating passage similar to that in the above-described mode A is formed, and the outdoor unit 3
8 is connected to the channel 151 via the two-way valve 170 and the four-way valve 101. As a result, the warm air is produced as in the heating operation mode A, and the refrigerant remaining in the outdoor unit 38 is further recovered to the suction side of the compressor 31. Immediately after switching from the cooling operation to the heating operation, a large amount of refrigerant remains in the outdoor unit 38. Therefore, when switching from the cooling operation to the heating operation, first, the mode B heating operation is performed, and the useless refrigerant remaining in the outdoor unit 38 is collected in the refrigeration cycle, and a sufficient amount of the refrigerant is secured after the heating operation is started. To improve the heating capacity, and then the mode A
, The outdoor unit 38, which is easily affected by the outside air, is disconnected from the refrigeration cycle, and a stable high heating capacity can be obtained.

(4) Heating operation mode C In the heating operation mode C, the four-way valve 101 is switched to the side shown by the solid line, and the two-way valves 170 and 183 are opened. That is,
In the heating operation mode C, a heating passage similar to the above-described mode A and mode B is formed, and further, the outdoor unit 3
A refrigerant passage for auxiliary heat absorption for operating the heat sink 8 as a heat absorber is formed. This auxiliary heat absorbing channel is connected to the liquid tank 36 →
Expansion valve 190 → two-way valve 183 → outdoor unit 38 → two-way valve 17
0 → the four-way valve 101 → the flow path 151 → the flow path of the compressor 31. The high-temperature refrigerant discharged from the compressor 31 is radiated by the radiator 33 to generate warm air, and then diverted to the heat absorber 35 and the auxiliary heat absorbing flow path, where heat is absorbed by both the heat absorber 35 and the outdoor unit 38. Is performed. Therefore, under the environmental conditions in which heat can be absorbed from the outside air, the heating operation can be performed in the mode C to increase the heating capacity more than in the modes A and B.

Eighth Embodiment FIG. 10 shows the configuration of a refrigeration cycle according to an eighth embodiment. The entire configuration of the eighth embodiment is the same as that of the first embodiment shown in FIGS. 1 and 2 except for the refrigeration cycle, and the description is omitted. The same devices as those in the first embodiment are denoted by the same reference numerals, and the description will focus on the differences. In the refrigeration cycle of the eighth embodiment, the check valve 162 of the refrigeration cycle of the fifth embodiment shown in FIG. 7 is replaced with a two-way valve 183. In the eighth embodiment, the expansion valve 34 serves as a first expansion valve, the expansion valve 190 serves as a second expansion valve, the two-way valves 180 to 183 and the check valve 70 serve as flow path switching means, The blower fan 37 controls the blowing means,
Constitute the control means.

In the eighth embodiment, the cooling operation mode
There are a heating operation mode A, a heating operation mode B, and a heating operation mode C, and two-way valves 180 to 18 according to each operation mode.
3 switches the refrigerant flow path. (1) Cooling operation mode In the cooling operation mode, the two-way valve 180 is opened and the two-way valve 1 is opened.
81 to 183 are closed. That is, the compressor 3
1 is connected to the cooling channel described above. Thereby, the compressor 31 → the two-way valve 180 → the outdoor unit 3
8 → check valve 70 → radiator 33 → heat absorber 35 → refrigerant flow path of compressor 31 is formed, heat of the refrigerant discharged from compressor 31 is mainly radiated from outdoor unit 38 to the outside air, and blower fan 37 The heat of the blown air is absorbed by the heat absorber 35 to produce cool air.

(2) Heating operation mode A In the heating operation mode A, the two-way valve 181 is opened and the two-way valves 180, 182, 183 are closed. That is, the refrigerant discharge side of the compressor 31 is connected to the above-described heating channel. Thereby, the compressor 31 → two-way valve 181
→ bypass flow path 150 → radiator 33 → heat absorber 35 → a refrigerant flow path of compressor 31 is formed, and radiates heat of refrigerant discharged from compressor 31 from radiator 33 to air blown by blower fan 37. Make hot air.

(3) Heating operation mode B In the heating operation mode B, the two-way valves 181 and 182 are opened, and the two-way valves 180 and 183 are closed. In other words, in the heating operation B, the same heating channel as that in the mode A described above is formed, and the outdoor unit 38 is further connected to the channel 151 via the two-way valve 182. As a result, the warm air is produced as in the heating operation mode A, and the refrigerant remaining in the outdoor unit 38 is further recovered to the suction side of the compressor 31. Immediately after switching from the cooling operation to the heating operation, a large amount of refrigerant remains in the outdoor unit 38. Therefore,
When switching from the cooling operation to the heating operation, first, the heating operation in mode B is performed to collect the unnecessary refrigerant remaining in the outdoor unit 38 into the refrigeration cycle, and after starting the heating operation, a sufficient amount of the refrigerant is secured to start the heating operation. In addition to improving the capacity, the mode is switched to the mode A heating operation, and the outdoor unit 38 that is easily affected by the outside air is separated from the refrigeration cycle, so that a high heating capacity can be stably obtained.

(4) Heating operation mode C In the heating operation mode C, the two-way valve 180 is closed and all the other two-way valves 181 to 183 are opened. That is, in the heating operation mode C, the above-described modes A and B
In addition to forming a heating channel similar to that described above, the outdoor unit 38
To form a refrigerant passage for auxiliary heat absorption for operating the heat sink as a heat absorber. This auxiliary heat absorbing flow path is provided by the liquid tank 36 → the expansion valve 190 → the two-way valve 183 → the outdoor unit 38 → the two-way valve 182.
→ Flow path 151 → Flow path of compressor 31. The high-temperature refrigerant discharged from the compressor 31 is supplied to the radiator 33
After the heat is radiated to generate hot air, the heat is diverted to the heat absorber 35 and the auxiliary heat absorption channel, and heat is absorbed by both the heat absorber 35 and the outdoor unit 38. Therefore, under the environmental conditions in which heat can be absorbed from the outside air, the heating operation can be performed in the mode C to increase the heating capacity more than in the modes A and B.

Ninth Embodiment FIG. 11 shows the configuration of a refrigeration cycle according to a ninth embodiment. The entire configuration of the ninth embodiment is the same as that of the first embodiment shown in FIGS. 1 and 2 except for the refrigeration cycle, and a description thereof will be omitted. The same devices as those in the first embodiment are denoted by the same reference numerals, and the description will focus on the differences. The refrigeration cycle of the ninth embodiment is a modification of the refrigeration cycle of the eighth embodiment shown in FIG. That is, the compressor 31 is connected from the refrigerant outflow side of the liquid tank 36 to the outdoor unit 38 via the expansion valve 190 and the two-way valve 183, and from the connection point between the outdoor unit 38 and the check valve 70 via the two-way valve 182. Connect to the suction side of. In the ninth embodiment, the expansion valve 34 functions as a first expansion valve, the expansion valve 190 functions as a second expansion valve, and the two-way valves 180-1.
83 and the check valve 70 constitute a flow path switching means, the blower fan 37 constitutes a blowing means, and the control device 43 constitutes a control means.

In the ninth embodiment, the cooling operation mode
There are a heating operation mode A, a heating operation mode B, and a heating operation mode C, and two-way valves 180 to 18 according to each operation mode.
3 switches the refrigerant flow path. (1) Cooling operation mode In the cooling operation mode, the two-way valve 180 is opened and the two-way valve 1 is opened.
81 to 183 are closed. That is, the compressor 3
1 is connected to the cooling channel described above. Thereby, the compressor 31 → the two-way valve 180 → the outdoor unit 3
8 → check valve 70 → radiator 33 → heat absorber 35 → refrigerant flow path of compressor 31 is formed, heat of the refrigerant discharged from compressor 31 is mainly radiated from outdoor unit 38 to the outside air, and blower fan 37 The heat of the blown air is absorbed by the heat absorber 35 to produce cool air.

(2) Heating operation mode A In the heating operation mode A, the two-way valve 181 is opened and the two-way valves 180, 182, 183 are closed. That is, the refrigerant discharge side of the compressor 31 is connected to the above-described heating channel. Thereby, the compressor 31 → two-way valve 181
→ bypass flow path 150 → radiator 33 → heat absorber 35 → a refrigerant flow path of compressor 31 is formed, and radiates heat of refrigerant discharged from compressor 31 from radiator 33 to air blown by blower fan 37. Make hot air.

(3) Heating operation mode B In the heating operation mode B, the two-way valves 181 and 182 are opened and the two-way valves 180 and 183 are closed. In other words, in the heating operation B, a heating channel similar to the mode A described above is formed, and the outdoor unit 38 is further connected to the channel 152 via the two-way valve 182. As a result, hot air is produced in the same manner as in the heating operation mode A, and the refrigerant remaining in the outdoor unit 38 is further compressed by the compressor 31 through the two-way valve 182.
Is collected to the suction side. Immediately after switching from the cooling operation to the heating operation, a large amount of refrigerant remains in the outdoor unit 38. Therefore, when switching from the cooling operation to the heating operation, first, the heating operation in mode B is performed and the outdoor unit 3
The useless refrigerant stagnating in the refrigerant 8 is collected in the refrigeration cycle, and a sufficient amount of the refrigerant is secured after the heating operation is started to improve the heating capacity, and thereafter, the mode is switched to the mode A heating operation to be easily affected by the outside air. The outdoor unit 38 is separated from the refrigeration cycle, and a high heating capacity can be stably obtained.

(4) Heating operation mode C In the heating operation mode C, the two-way valve 180 is closed and all the other two-way valves 181 to 183 are opened. That is, in the heating operation mode C, the above-described modes A and B
In addition to forming a heating channel similar to that described above, the outdoor unit 38
To form a refrigerant passage for auxiliary heat absorption for operating the heat sink as a heat absorber. This auxiliary heat absorbing flow path is provided by the liquid tank 36 → the expansion valve 190 → the two-way valve 183 → the outdoor unit 38 → the two-way valve 182.
→ The flow path 152 → the flow path of the compressor 31. The high-temperature refrigerant discharged from the compressor 31 is supplied to the radiator 33
After the heat is radiated to generate hot air, the heat is diverted to the heat absorber 35 and the auxiliary heat absorption channel, and heat is absorbed by both the heat absorber 35 and the outdoor unit 38. Therefore, under the environmental conditions in which heat can be absorbed from the outside air, the heating operation can be performed in the mode C to increase the heating capacity more than in the modes A and B.

Tenth Embodiment FIG. 12 shows a configuration of a refrigeration cycle according to a tenth embodiment.
The overall configuration of the tenth embodiment is shown in FIGS.
Except for the refrigerating cycle, and the description is omitted. The same devices as those in the first embodiment are denoted by the same reference numerals, and the description will focus on the differences. The refrigeration cycle of the tenth embodiment includes a four-way valve 101 for switching the refrigerant flow path according to the operation mode, and check valves 70 and 160 to 162. The refrigerant discharge side of the compressor 31 is connected to the four-way valve 101, and the four-way valve 101 switches the refrigerant flow path according to the operation mode. Three refrigerant flow paths are connected to the refrigerant discharge side of the four-way valve 101. The first refrigerant flow path is a cooling flow path that passes through the outdoor unit 38 and the check valve 70 to the radiator 33, and the second flow path passes through the bypass flow path 150 and the check valve 160 to radiate heat. This is a heating flow path leading to the heater 33. further,
The third flow path is a flow path for refrigerant recovery that reaches the suction side of the compressor 31 through the check valve 161 and the flow path 151.
The check valve 70 prevents the flow of the refrigerant from the radiator 33 to the outdoor unit 38 in the cooling flow path, and the check valve 160 prevents the flow of the refrigerant from the radiator 33 to the four-way valve 101 in the heating flow path. I do. The check valve 161 prevents the refrigerant from flowing from the suction side of the compressor 31 to the four-way valve 101 in the refrigerant recovery flow path. Further, a check valve 162 is provided on the refrigerant outflow side of the heat absorber 35 to block the flow of the refrigerant from the suction side of the compressor 31 to the heat absorber 35.

In the tenth embodiment, there are a cooling operation mode and a heating operation mode B, and the refrigerant flow path is switched by the four-way valve 101 according to each operation mode. (1) Cooling operation mode In the cooling operation mode, the four-way valve 101 is switched to the broken line side. That is, the refrigerant discharge side of the compressor 31 is connected to the cooling flow path described above, and the bypass flow path 150 and the flow path 1 are connected.
51 is communicated. Thereby, a refrigerant flow path of the compressor 31 → the four-way valve 101 → the outdoor unit 38 → the check valve 70 → the radiator 33 → the heat absorber 35 → the compressor 31 is formed,
The heat of the refrigerant discharged from the compressor 31 is mainly radiated to the outside air from the outdoor unit 38, and the heat of the air blown by the blower fan 37 is absorbed by the heat absorber 35 to produce cool air. Immediately after switching from the heating operation to the cooling operation, a large amount of refrigerant remains in the bypass passage 150 for heating. The refrigerant stagnating in such a bypass flow path 150 is recovered to the suction side of the compressor 31 through the four-way valve 101, the check valve 161, and the flow path 151, and a sufficient amount of the refrigerant is secured during the cooling operation. High cooling capacity can be maintained.

(2) Heating operation mode B In the heating operation mode B, the four-way valve 101 is switched to the side indicated by the solid line. That is, the refrigerant discharged from the compressor 31 is connected to the above-described heating flow path, and the bypass flow path 150 is connected to the refrigerant recovery flow path 151 via the four-way valve 101 and the check valve 161. As a result, the compressor 31 →
A four-way valve 101 → a bypass flow path 150 → a check valve 160 → a radiator 33 → a heat absorber 35 → a refrigerant flow path of the compressor 31 is formed, and the heat of the refrigerant discharged from the compressor 31 is transmitted from the radiator 33 to the blower fan 37. Heat is released to the blown air to produce warm air. Further, the refrigerant stagnating in the outdoor unit 38 is recovered to the suction side of the compressor 31 via the above-described refrigerant recovery flow path. Immediately after switching from the cooling operation to the heating operation, a large amount of refrigerant remains in the outdoor unit 38. Such a useless refrigerant stagnating in the outdoor unit 38 is collected in the refrigeration cycle, and a sufficient amount of the refrigerant can be secured during the heating operation to exhibit a high heating capacity.

In the tenth embodiment, when the compressor 31 is stopped during the cooling operation, the four-way valve 101 is switched to the solid line side, and the high-pressure refrigerant remaining in the outdoor unit 38 is moved to the suction side of the compressor 31. By recovering, the pressure difference between the suction side and the discharge side of the compressor 31 is reduced, and the starting load when the compressor 31 is restarted can be reduced. At this time, the check valve 162 prevents the recovered high-pressure refrigerant from flowing back to the heat absorber 35, and prevents a decrease in cooling capacity.

FIG. 13 shows a configuration of a refrigeration cycle according to an eleventh embodiment.
The overall configuration of the eleventh embodiment is shown in FIGS.
Except for the refrigerating cycle, and the description is omitted. The same devices as those in the first embodiment are denoted by the same reference numerals, and the description will focus on the differences. The refrigeration cycle of the eleventh embodiment is different from the refrigeration cycle of the ninth embodiment shown in FIG. 11 in that a check valve 162 is provided on the refrigerant outflow side of the heat absorber 35 to allow the refrigerant to flow from the compressor 31 to the heat absorber 35. Is to prevent. The operation mode and operation of the eleventh embodiment are the same as those of the ninth embodiment. Further, in the eleventh embodiment, when the compressor 31 is stopped during the cooling operation, the two-way valve 182 is opened, and the high-pressure refrigerant remaining in the outdoor unit 38 is recovered to the suction side of the compressor 31. Thereby, the pressure difference between the suction side and the discharge side of the compressor 31 is reduced, and the starting load when the compressor 31 is restarted can be reduced. At this time, the check valve 162 prevents the recovered high-pressure refrigerant from flowing back to the heat absorber 35, and prevents a decrease in cooling capacity. In the eleventh embodiment, the expansion valve 34 is the first expansion valve, and the expansion valve 190 is the second expansion valve.
, The two-way valves 180 to 183 and the check valve 70 constitute flow path switching means, the blower fan 37 constitutes air blowing means, and the control device 43 constitutes control means.

In the tenth and eleventh embodiments, the check valves are provided on the refrigerant outflow side of the heat sink 35 of the refrigeration cycle of the first and ninth embodiments, respectively. The same effect can be obtained by providing a check valve on the refrigerant outflow side of the heat absorber 35 of the refrigeration cycle of the example.

Twelfth Embodiment FIG. 14 shows the configuration of a refrigeration cycle according to a twelfth embodiment.
The overall structure of the twelfth embodiment is shown in FIGS.
Except for the refrigerating cycle, and the description is omitted. The same devices as those in the first embodiment are denoted by the same reference numerals, and the description will focus on the differences. The refrigeration cycle of the twelfth embodiment includes a four-way valve 101 for switching the refrigerant flow path according to the operation mode,
Two-way valves 180 to 183 and check valves 160 and 161 are provided.

In the twelfth embodiment, there are a cooling operation mode, a heating operation mode A, and a heating operation mode D,
Four-way valve 101 and two-way valve 180-1 according to each operation mode
83 switches the refrigerant flow path. (1) Cooling operation mode In the cooling operation mode, the four-way valve 101 is switched to the broken line side, the two-way valve 181 is closed, and the other two-way valves 180, 18
Release 2,183. Thereby, the compressor 3
1 → four-way valve 101 → two-way valve 180 → outdoor unit 38 → two-way valve 182 → two-way valve 183 → radiator 33 → liquid tank 36 → expansion valve 34 → heat absorber 35 → four-way valve 101 → check valve 161 →
A refrigerant flow path of the compressor 31 is formed, heat of the refrigerant discharged from the compressor 31 is mainly radiated to the outside air from the outdoor unit 38, and heat of the air blown by the blower fan 37 is absorbed by the heat absorber 35 to produce the cool air. Is made.

(2) Heating operation mode A In the heating operation mode A, the four-way valve 101 is switched to the broken line side, the two-way valves 181 and 183 are opened, and the two-way valves 180 and 1 are opened.
82 is closed. Thereby, the compressor 31 → the four-way valve 101 → the two-way valve 181 → the two-way valve 183 → the radiator 33
→ liquid tank 36 → expansion valve 34 → heat absorber 35 → four-way valve 10
1 → a check valve 161 → a refrigerant flow path of the compressor 31 is formed, and the heat of the refrigerant discharged from the compressor 31 is radiated from the radiator 33 to the air blown by the blower fan 37 to generate warm air.

(3) Heating operation mode D In the heating operation mode D, the four-way valve 101 is switched to the solid line side, the two-way valves 180 and 182 are opened, and the two-way valves 181 and
83 is closed. Thereby, the compressor 31 → the four-way valve 101 → the heat absorber 35 → the check valve 160 → the liquid tank 36
→ radiator 33 → expansion valve 190 → two-way valve 182 → outdoor unit 3
8 → two-way valve 180 → four-way valve 101 → check valve 161 → refrigerant flow path of compressor 31 is formed, and heat of refrigerant discharged from compressor 31 is absorbed by heat absorber 35 and radiator 33
Then, heat is dissipated, and warm air is produced. This heating operation mode D
In the mode A, the flow of the refrigerant is opposite to that in the mode A described above, and the refrigerant also flows to the outdoor unit 38. Therefore, as a result of the heating operation in the mode A, if more refrigerant than necessary is retained in the outdoor unit 38, the mode D And the refrigerant can be recovered by switching to the heating operation.

Next, the operation mode switching control of the control device 43 of each embodiment described above will be described. FIG. 15 is a flowchart illustrating an operation mode switching control example for the embodiment having the heating operation mode A and the heating operation mode B in the above-described embodiment. In step S201, the heating operation operating time Time is compared with the predetermined time Time1, and if less than the predetermined time, the process proceeds to step S202 to select mode B, and if it is equal to or more than the predetermined time, the process proceeds to step S203 to select mode A. . By this switching control, the heating operation is performed while collecting the refrigerant stagnating in the outdoor unit 38 in the mode B for a while after the heating operation is started, and thereafter, the outdoor unit 38 which is easily affected by the outside air in the mode A.
, And the heating operation is continued, so that a sufficient amount of refrigerant can be secured during the heating operation, and high heating performance can be exhibited.

FIG. 16 is a flowchart showing an example of operation mode switching control for the embodiment having the heating operation mode A and the heating operation mode C in the above-described embodiment. In step S301, the heating operation operating time Time is compared with the predetermined time Time1, and if it is less than the predetermined time, the process proceeds to step S301.
The program proceeds to step 303, where the heating operation mode C is selected. Step S302
Then, based on the environmental conditions detected by various sensors such as the outside air temperature sensor 62, the outdoor unit (condenser) 38
It is determined whether or not is capable of absorbing heat from the outside air. If heat absorption is possible, the process proceeds to step S303 to select the heating operation mode C. Otherwise, the process proceeds to step S304 to select the heating operation mode A. By this switching control, for a while after the heating operation is started, a heating operation of absorbing heat from outside air while recovering the refrigerant stagnated in the outdoor unit 38 in the mode C is performed, and the heating immediately after the heating operation is started. Ability can be improved. Thereafter, the suction pressure of the compressor 31 rises from the initial state, and if the outside air temperature is low, heat absorption from the outside air cannot be performed. Therefore, the heating operation is performed in mode A, and if the outside air temperature is high, the heating operation is continued in mode C. In the above embodiment, whether or not the heating operation is in the initial state is determined based on the elapsed time after the start of the heating operation, and the heating operation mode C is selected in the initial state. A determination may be made as to whether or not the heating operation is in the initial state based on thermal environmental conditions such as the temperature of the conditioned air and the temperature in the passenger compartment, and the heating operation mode may be selected based on the determination result. The determination as to whether or not heat absorption by the outdoor unit 38 may be performed may be performed based on, for example, the refrigerant suction temperature of the compressor 31 and the outside air temperature. That is, if the temperature of the suction refrigerant is higher than the outside air temperature, it is determined that heat absorption is impossible. Alternatively, the determination may be made based on the suction pressure of the compressor 31.

FIG. 17 is a flowchart showing an example of operation mode switching control for the embodiment having the heating operation modes A, B, and C in the above-described embodiment. Step S4
At 01, it is determined whether or not the outside air temperature Tamb detected by the outside air temperature sensor 62 is higher than a predetermined temperature Tamb1, and if it is higher than the predetermined temperature, the process proceeds to step S402,
If the temperature is equal to or lower than the predetermined temperature, the process proceeds to step S405. In step S402, it is determined whether the heating operation is in the initial state. That is, the operating time Time of the heating operation is the predetermined time Time
If it is less than 1, the process proceeds to step S406, and the heating operation mode C is selected.
Go to 403. In step S403, it is determined whether or not the environmental condition is such that heat can be absorbed by the outdoor unit (condenser) 38. If the heat can be absorbed, the process proceeds to step S406, and the heating operation mode C is selected.
Go to 04. In step S404, the switching time Time from the heating operation mode C is compared with the predetermined time Time2. If the switching time is less than the predetermined time, the process proceeds to step S407 to select the heating operation mode B. If the switching time is longer than the predetermined time, the process proceeds to step S408. To select the heating operation mode A.

On the other hand, if it is determined in step S401 that the outside air temperature Tamb is equal to or lower than the predetermined temperature Tamb1, the process proceeds to step S401.
At 405, it is determined whether the operation time Time of the heating operation is less than the predetermined time Time1, and if it is less than the predetermined time, the process proceeds to step S407 to select the heating operation mode B, and if it is not less than the predetermined time, step S408. Proceed to and select the heating operation mode A. By this switching control, in an extremely cold environment, the heating operation in the mode B is performed first to
Since the refrigerant inside is recovered, the mode is switched to mode A, and the outdoor unit 38, which is easily affected by the outside air, is separated and the heating operation is continued. Therefore, a sufficient amount of refrigerant is maintained during the heating operation to exhibit high heating performance. be able to. When the environment is not extremely cold, the heating operation in mode C is first performed to recover the refrigerant stagnating in the outdoor unit 38, and the heating operation to absorb heat from the outside air is performed. Ability can be improved. Thereafter, the suction pressure of the compressor 31 rises from the initial state, and if the outside air temperature is low, heat absorption from the outside air cannot be performed. Therefore, the heating operation is performed in mode A, and if the outside air temperature is high, the heating operation is continued in mode C. Perform stable heating operation.

FIG. 18 is a flowchart showing an example of operation mode switching control for the embodiment having the heating operation mode A and the heating operation mode D in the above-described embodiment. In step S501, it is determined whether or not the operation is the dehumidification operation. If the operation is the dehumidification operation, the process proceeds to step S502 to select the heating operation mode A. If the operation is not the dehumidification operation, the process proceeds to step S503 to select the heating operation mode D. With this control, an optimal heating operation mode can be selected according to the necessity of dehumidification.

[0063]

As described above, according to the first aspect of the present invention, cooling is performed in the first flow path for supplying the refrigerant discharged from the compressor to the heat radiating vehicle interior heat exchanger via the vehicle exterior heat exchanger. A cooling operation mode to be performed, and a heating operation mode A in which the refrigerant discharged from the compressor is heated in a second flow path that bypasses the exterior heat exchanger and supplies the heat to the heat radiation interior heat exchanger,
A heating operation mode B for heating by the second flow path and a third flow path for recovering the refrigerant from the exterior heat exchanger to the refrigerant suction side of the compressor; Since the switching is performed, it is possible to provide an inexpensive heat pump type air conditioner that stably exhibits a high air conditioning capacity. In the initial state after the start of the heating operation, the heating operation mode B is selected, so that the waste refrigerant remaining in the heat exchanger outside the vehicle after the start of the heating operation is collected in the refrigeration cycle, and sufficient refrigerant is collected. Heating capacity can be improved by securing the amount. After that, Mode A
And the outside heat exchanger which is easily affected by the outside air is separated from the refrigeration cycle, so that a high heating capacity can be stably obtained. According to the second aspect of the present invention, a cooling operation mode in which cooling is performed in the first flow path for supplying the refrigerant discharged from the compressor to the heat-radiating vehicle interior heat exchanger via the vehicle exterior heat exchanger, and the refrigerant discharged from the compressor Operation mode A in which heating is performed in a second flow path that supplies the heat to the heat-dissipating interior heat exchanger bypassing the exterior heat exchanger, and heating the exterior heat from the second flow path and the second expansion valve. And a fourth flow path for flowing the refrigerant to the refrigerant suction side of the compressor through the exchanger, and a heating operation mode C for performing heating by the fourth flow path,
Since the refrigerant flow path is switched according to the operation mode, it is possible to provide an inexpensive heat pump type air conditioner that exhibits stable and high air conditioning performance. According to the invention of claim 3, since the heating operation mode C is selected in the initial state after the start of the heating operation, in addition to the heat absorption by the heat-absorbing interior heat exchanger, the outside heat exchanger also receives heat from the outside air. Heat is absorbed, and the heating capacity can be increased. According to the invention of claim 4, after the initial state of the heating operation, the heating operation mode C is selected when heat can be absorbed by the external heat exchanger, and otherwise the heating operation mode A is selected. Therefore, the optimal heating operation mode is selected according to the environmental conditions, and a stable high heating capacity can be obtained.
According to the invention of claim 5, a cooling operation mode in which cooling is performed in the first flow path that supplies the refrigerant discharged from the compressor to the heat-radiating vehicle interior heat exchanger through the vehicle exterior heat exchanger, and the refrigerant discharged from the compressor. Operation mode A in which heating is performed in the second flow path that supplies the heat to the heat-dissipating interior heat exchanger bypassing the exterior heat exchanger, and the compressor refrigerant from the second flow path and the exterior heat exchanger. A heating operation mode B in which heating is performed by a third flow path for recovering the refrigerant to the suction side, and refrigerant flowing from the second flow path and the second expansion valve to the suction side of the compressor through the exterior heat exchanger. An inexpensive heat pump air conditioner that has a heating operation mode C in which heating is performed by the fourth flow path and the refrigerant flow path is switched in accordance with the operation mode. Can provide . According to the invention of claim 6, in the initial state after the start of the heating operation, the heating operation mode C is selected when the outside air temperature is higher than the predetermined value, and otherwise, the heating operation mode B is selected. Therefore, an optimal heating operation mode is selected according to environmental conditions, and a stable high heating capacity can be obtained. According to the invention of claim 7, after the initial state of the heating operation, if the outside air temperature is lower than the predetermined value, the heating operation mode A is selected, and the outside air temperature is higher than the predetermined value and heat is absorbed by the vehicle exterior heat exchanger. When heating is possible, the heating operation mode C is selected. When the outside air temperature is higher than a predetermined value and heat absorption by the outside heat exchanger is not possible, the heating operation mode B is selected. An optimal heating operation mode is selected in accordance with this, and a stable high heating capacity can be obtained. According to the invention of claim 8, the check valve for preventing the flow of the refrigerant from the refrigerant suction side of the compressor to the heat absorption interior heat exchanger is provided on the refrigerant outflow side of the heat absorption interior heat exchanger. In addition, when the refrigerant is recovered from the exterior heat exchanger in the heating operation mode B, backflow of the refrigerant to the exterior heat exchanger can be prevented. According to the ninth aspect of the invention, in the heating operation mode D, the flow of the refrigerant is opposite to that in the mode A, and the refrigerant flows also to the heat exchanger outside the vehicle compartment. If more refrigerant than necessary stays inside, the operation can be switched to the heating operation in mode D to recover the refrigerant.

[Brief description of the drawings]

FIG. 1 is a diagram showing an overall configuration of a first embodiment.

FIG. 2 is a diagram showing the overall configuration of the first embodiment following FIG. 1;

FIG. 3 is a diagram illustrating a configuration of a refrigeration cycle according to the first embodiment.

FIG. 4 is a diagram showing a configuration of a refrigeration cycle according to a second embodiment.

FIG. 5 is a diagram illustrating a configuration of a refrigeration cycle according to a third embodiment.

FIG. 6 is a diagram illustrating a configuration of a refrigeration cycle according to a fourth embodiment.

FIG. 7 is a diagram showing a configuration of a refrigeration cycle according to a fifth embodiment.

FIG. 8 is a diagram showing a configuration of a refrigeration cycle according to a sixth embodiment.

FIG. 9 is a diagram illustrating a configuration of a refrigeration cycle according to a seventh embodiment.

FIG. 10 is a diagram showing a configuration of a refrigeration cycle according to an eighth embodiment.

FIG. 11 is a diagram showing a configuration of a refrigeration cycle according to a ninth embodiment.

FIG. 12 is a diagram showing a configuration of a refrigeration cycle according to a tenth embodiment.

FIG. 13 is a diagram showing a configuration of a refrigeration cycle according to an eleventh embodiment.

FIG. 14 is a diagram showing a configuration of a refrigeration cycle according to a twelfth embodiment.

FIG. 15 is a flowchart showing an operation mode switching control example for an embodiment having a heating operation mode A and a heating operation mode B;

FIG. 16 is a flowchart showing an example of operation mode switching control for an embodiment having a heating operation mode A and a heating operation mode C;

FIG. 17 is a flowchart showing an example of operation mode switching control for an embodiment having heating operation modes A, B, and C;

FIG. 18 is a flowchart showing an example of operation mode switching control for an embodiment having a heating operation mode A and a heating operation mode D;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 31 Compressor 33 Heat dissipation heat exchanger (radiator) 34, 190 Expansion valve 35 Heat absorption heat exchanger (heat absorber) 38 Heat exchanger outside the vehicle (outdoor unit) 43 Control device 70, 160, 161, 162 Check valve 101 Four-way valve 150, 151, 152, 153 Flow path 170, 180, 181, 182, 183 Two-way valve

Continuation of the front page (56) References JP-A-6-143992 (JP, A) JP-A-59-21955 (JP, A) JP-A-1-269885 (JP, A) JP-A-3-31640 (JP) , A) Hikaru 2-130808 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) B60H 1/32 615

Claims (9)

(57) [Claims] 1. A compressor for compressing a refrigerant, an external heat exchanger for exchanging heat between the refrigerant and the outside air, and a heat exchanger for heat radiation for radiating heat of the refrigerant to air blown by a blowing means. An expansion valve for adiabatically expanding the refrigerant flowing out of the heat exchanger for heat dissipation, and a refrigerant suction of the compressor by absorbing heat of the air blown by the blowing means to the refrigerant flowing out of the expansion valve. A heat-absorbing vehicle interior heat exchanger for sending refrigerant to the side; a first flow path for supplying refrigerant discharged from the compressor to the heat-radiating vehicle interior heat exchanger via the vehicle exterior heat exchanger; and the compressor. Supplying the discharged refrigerant to the heat radiating vehicle interior heat exchanger bypassing the vehicle exterior heat exchanger.
And flow path, and a third flow path a refrigerant staying in the vehicle exterior heat exchanger to the refrigerant suction side recovered in the compressor, and channel switching means for switching a refrigerant flow path, the first A cooling operation mode in which cooling is performed by one flow path;
It has a heating operation mode A in which heating is performed only by the second flow path, and a heating operation mode B in which heating is performed by the second flow path and the third flow path. Control means for switching the refrigerant flow path by flow path switching means , wherein the control means is configured to control the heating in an initial state after the start of the heating operation.
Chamber operation mode B, and after a predetermined time, the heating operation mode
Vehicular heat pump type cooling and heating apparatus according to claim you to select the over-de A. 2. A compressor for compressing a refrigerant, an external heat exchanger for exchanging heat between the refrigerant and the outside air, and a discharger for radiating heat of the refrigerant to air blown by blowing means.
Heat inner heat exchanger, the refrigerant flowing out of the heat-radiating inner heat exchanger adiabatic expansion
First and second expansion valves for causing the heat of the air blown by the blowing means to flow into the first expansion valve.
Absorbs heat to the refrigerant flowing out of the expansion valve,
A heat-absorbing inner heat exchange exchanger for delivering refrigerant to the refrigerant suction side, the car outdoor heat exchanger refrigerant discharged of the compressor
1st flow path which supplies to the heat exchanger for heat dissipation in the vehicle through
And the refrigerant discharged from the compressor is exchanged for heat outside the vehicle cabin.
Second to supply the heat to the heat-exchange vehicle interior heat exchanger, bypassing the heat exchanger
And the outside heat exchanger from the second expansion valve.
Flow the refrigerant through the refrigerant suction side of the compressor through
Flow path switching means having four flow paths and switching a refrigerant flow path
A cooling operation mode for performing cooling by the first flow path;
Heating operation mode in which heating is performed only by the second flow path
A, and heating by the second flow path and the fourth flow path.
And heating operation mode C to be performed.
Control means for switching the refrigerant flow path by the flow path switching means
A heat pump type air conditioner for a vehicle, comprising: 3. A heat pump type for a vehicle according to claim 2.
In the cooling and heating apparatus, the control means may control the heating in an initial state after the start of the heating operation.
A heat pump type cooling / heating device for a vehicle , wherein the cell operation mode C is selected . 4. The heat pump air conditioner for a vehicle according to claim 3, wherein the control unit is configured to control the vehicle compartment after an initial state of a heating operation.
If the external heat exchanger can absorb heat, the heating operation mode C
Select heating operation mode A if not.
A heat pump type cooling / heating device for a vehicle, comprising: 5. A compressor for compressing a refrigerant, an external heat exchanger for exchanging heat between the refrigerant and the outside air, and a discharger for releasing heat of the refrigerant to air blown by blowing means.
Heat inner heat exchanger, the refrigerant flowing out of the heat-radiating inner heat exchanger adiabatic expansion
First and second expansion valves for causing the heat of the air blown by the blowing means to flow into the first expansion valve.
Absorbs heat to the refrigerant flowing out of the expansion valve,
A heat-absorbing interior heat exchanger for sending refrigerant to the refrigerant suction side, and a refrigerant discharged from the compressor to the exterior heat exchanger.
1st flow path which supplies to the heat exchanger for heat dissipation in the vehicle through
And the refrigerant discharged from the compressor is exchanged for heat outside the vehicle cabin.
Second to supply the heat to the heat-exchange vehicle interior heat exchanger, bypassing the heat exchanger
Flow path and the refrigerant stagnating in the exterior heat exchanger
A third flow path for recovery to a refrigerant suction side of the compressor;
From the second expansion valve through the exterior heat exchanger
A fourth flow path for flowing the refrigerant to the suction side of the compressor.
Channel switching means for switching the refrigerant channel, and a cooling operation mode for performing cooling by the first channel,
Heating operation mode in which heating is performed only by the second flow path
A, and heating by the second flow path and the third flow path.
Heating operation mode B, the second flow path and the fourth
And heating operation mode C in which heating is performed
The refrigerant flow is switched by the flow path switching means according to the operation mode.
A heat pump type air conditioner for a vehicle, comprising: control means for switching a road . 6. A heat pump type for a vehicle according to claim 5.
In the cooling and heating device, the control unit may be configured to control the outside air in an initial state after the heating operation is started.
If the temperature is higher than a predetermined value, the heating operation mode C is selected.
If not, select the heating operation mode B.
Vehicular heat pump type cooling and heating apparatus, characterized in that that. 7. The heat pump type cooling and heating device for a vehicle according to claim 6, wherein the control unit controls the outside air temperature after the initial state of the heating operation.
When the temperature is lower than the predetermined value, the heating operation mode A is selected.
When the outside air temperature is higher than the predetermined value and the outside heat exchange
If the exchanger can absorb heat, select the heating operation mode C
When the outside air temperature is higher than the predetermined value and the outside heat exchange
If the heat exchanger cannot absorb heat, select the heating operation mode B.
A heat pump type cooling / heating device for a vehicle, comprising: The vehicle heat pump type cooling and heating apparatus according to any one of the paragraphs 8. claims 1-7, the refrigerant outlet side of the heat-absorbing inner heat exchanger, the compressor
From the refrigerant suction side of the lesser to the heat absorbing interior heat exchanger
A heat pump type cooling / heating device for a vehicle, comprising a check valve for preventing the flow of refrigerant . 9. A compressor for compressing a refrigerant, an external heat exchanger for exchanging heat between the refrigerant and the outside air, and a discharger for radiating heat of the refrigerant to air blown by blowing means.
A heat exchanger in the vehicle compartment for heat and one refrigerant inlet / outlet of the heat exchanger in the vehicle compartment for heat dissipation.
A two-way valve connected in parallel with the two-way valve,
A first expansion valve for adiabatically expanding the refrigerant flowing out of the heat exchanger, and a first expansion valve connected to the other refrigerant inlet / outlet of the heat-radiating vehicle interior heat exchanger.
And insulates the refrigerant flowing out of the heat exchanger for heat dissipation.
A second expansion valve to be expanded, and a blower connected to the refrigerant outflow side of the second expansion valve;
Heat-absorbing vehicle that absorbs the heat of the air blown by the steps into the refrigerant
An indoor heat exchanger , connected in parallel to the second expansion valve, and
Refrigerant flow from the heat exchanger to the heat-radiating vehicle interior heat exchanger
A check valve allowing the refrigerant and the refrigerant discharged from the compressor to the outside heat exchanger.
A first supply to the two-way valve and the first expansion valve via
And the refrigerant discharged from the compressor is
Bypassing the heat exchanger to the two-way valve and the first expansion valve
A second flow path to be supplied and a refrigerant discharged from the compressor
And a fifth flow path that supplies the heat to the heat absorbing vehicle interior heat exchanger.
Flow path switching means for switching the refrigerant flow path, and switching to the first flow path by the flow path switching means,
The refrigerant discharged from the compressor is supplied to the outside heat exchanger,
A two-way valve, the heat-dissipating interior heat exchanger, and the second expansion
Valve and the compressor through the heat-absorbing interior heat exchanger.
Cooling operation mode to be supplied to the
Switch to the second flow path and discharge the compressor.
The refrigerant is supplied to the two-way valve, the heat-radiating vehicle interior heat exchanger,
2 through the expansion valve and the heat-absorbing interior heat exchanger.
Heating operation mode A to be supplied to the compressor
Switching to the fifth flow path by the switching means,
The refrigerant discharged from the lesser is supplied to the heat absorbing vehicle interior heat exchanger,
Check valve, the heat-dissipating cabin heat exchanger, the first expansion
Valve, to the compressor via the exterior heat exchanger
Has a heating operation mode D to supply, according to the operation mode
Control hand switch more refrigerant flow path in the flow path switching unit Te
A heat pump type cooling and heating device for a vehicle, comprising: a step ;