JP6232592B2 - VEHICLE HEAT PUMP DEVICE AND VEHICLE AIR CONDITIONER - Google Patents

Description

   The present invention relates to a vehicle heat pump device and a vehicle air conditioner.

HEV (Hybrid Electric) equipped with both an internal combustion engine and an electric motor
There is an automobile called Vehicle (PH) or Plug-in Hybrid Vehicle (PHV). In such a vehicle air conditioner mounted on an automobile, it is common to heat the passenger compartment using the heat of the internal combustion engine and the Joule heat generated by the power of the storage battery.

   A vehicle air conditioner that performs a cooling operation using a heat pump cycle is also common. The heat pump cycle is composed of a compressor arranged in the engine room, an outdoor heat exchanger arranged in the front of the vehicle or at a position where wind can be introduced, an evaporator arranged in the intake passage of the vehicle compartment, an expansion valve, and the like. Is done. The high-temperature and high-pressure refrigerant compressed by the compressor is sent to the outdoor heat exchanger and cooled, and the cooled refrigerant is further lowered to low temperature and low pressure by the expansion valve and sent to the evaporator. And the air supplied to a vehicle interior by an evaporator is cooled. The evaporator is provided in an air conditioner (Heating, Ventilation, and Air Conditioning, hereinafter referred to as HVAC) installed in the passenger compartment.

   Conventionally, several proposals have been made on a vehicle air conditioner that heats a vehicle interior using a heat pump so that the power of the storage battery is not wasted (see, for example, Patent Document 1).

JP-A-8-197937

   In a conventional vehicle air conditioner that uses a heat pump cycle only during cooling operation, the refrigerant piping pattern is relatively simple as described above.

   However, a conventional vehicle air conditioner that performs heating operation using a heat pump cycle houses a compressor and a water-refrigerant heat exchanger in the same housing (FIGS. 21 to 21 of Patent Document 1). (See FIG. 24). When changing a conventional vehicle air conditioner that uses a heat pump cycle only during cooling operation so that heating operation using the heat pump cycle can also be performed, a compressor and a water refrigerant heat exchanger are housed in the same housing When is used, there is a problem that the piping pattern of the refrigerant around the compressor is greatly changed.

   In an automobile, various configurations such as an engine, a motor, a transmission, an air conditioning compressor, and an intake passage are mounted in a narrow space. Therefore, the layout flexibility of each configuration is small.

   In the field of automobiles, technical improvements are achieved by so-called minor changes in which the configuration is partially changed without changing the large configuration.

   The vehicle air conditioner may also be improved as a minor change of the vehicle. In this case, the modification of the configuration of the vehicle air conditioner is required to be a modification that does not affect other configurations of the vehicle.

   The vehicle air conditioner using the heat pump cycle is provided with refrigerant piping while avoiding other configurations of the vehicle. For this reason, in order to modify the vehicle air conditioner without affecting other configurations of the vehicle, it is a requirement not to greatly change the refrigerant piping pattern. Unlike the coolant pipe, the coolant pipe is made of aluminum, for example, in order to withstand high pressure. Therefore, it is not easy to change the layout of the refrigerant piping. Further, a large change in the refrigerant piping is not preferable because it greatly affects the layout of other components of the vehicle.

   An object of the present invention is for a vehicle that has fewer changes in the refrigerant piping pattern than a conventional vehicle air conditioner that uses a heat pump cycle only during cooling operation, and that enables heating operation using the heat pump cycle. A heat pump device and a vehicle air conditioner are provided.

   A vehicle heat pump device according to an aspect of the present invention is a vehicle heat pump device that uses a high-temperature and high-pressure refrigerant discharged from a compressor outside a housing and uses the high-temperature and high-pressure refrigerant discharged from the compressor. A first refrigerant introduction part for introducing heat from the outside of the housing, a water refrigerant heat exchanger capable of radiating heat from the high-temperature high-pressure refrigerant introduced from the first refrigerant introduction part to the coolant, and the water refrigerant heat exchange The housing for storing the cooler, the coolant introduction part capable of introducing the coolant from the outside of the housing to the water refrigerant heat exchanger, and the cooling from the water refrigerant heat exchanger to the outside of the housing A configuration including a cooling liquid deriving unit capable of deriving a liquid and a first refrigerant deriving unit for deriving the refrigerant that has passed through the water refrigerant heat exchanger to the outside of the casing is adopted.

   ADVANTAGE OF THE INVENTION According to this invention, heating operation using not only cooling operation but a heat pump cycle can be easily performed by connecting the vehicle heat pump apparatus to an outdoor heat exchanger, a compressor, and an evaporator. Furthermore, compared with a conventional vehicle air conditioner that uses a heat pump cycle during cooling operation, the number of changes in the refrigerant piping pattern is reduced.

1 is a configuration diagram showing a vehicle heat pump device and a vehicle air conditioner according to an embodiment of the present invention. The figure explaining the operation | movement at the time of air_conditionaing | cooling operation in the vehicle air conditioner of embodiment. The figure explaining the operation | movement at the time of the heating operation in the vehicle air conditioner of embodiment. The figure explaining the change of refrigerant piping from the conventional vehicle air conditioner The block diagram explaining the modification of the heat pump apparatus for vehicles and the air conditioner for vehicles of embodiment of this invention The block diagram explaining the modification of the heat pump apparatus for vehicles and the air conditioner for vehicles of embodiment of this invention

   Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

   FIG. 1 is a configuration diagram showing a vehicle heat pump device and a vehicle air conditioner according to an embodiment of the present invention.

The vehicle air conditioner according to the embodiment of the present invention includes a vehicle heat pump device 10, an engine cooler 40 (corresponding to an internal combustion engine cooler), a heater core 44, an evaporator 48, a compressor 12, and an expansion valve 52. The outdoor heat exchanger 56, the on-off valve 60, a coolant pipe connecting them, a refrigerant pipe, a connection portion, and the like. A heater core 44 (corresponding to a heat exchanger for heating) and an evaporator 48 are included in the HVAC 70 mounted in the vehicle interior. Here, the interior side of the firewall is called the vehicle interior.

   The vehicle heat pump device 10 includes a water / refrigerant heat exchanger 14, an accumulator 16, a three-way valve 18, a check valve 20, an on-off valve 22 with an orifice, an on-off valve 24, a casing 26, and a coolant introduction. A pipe 31, a coolant outlet pipe 32, two refrigerant outlet pipes 33 and 35, two refrigerant inlet pipes 34 and 36, and a control unit 38 are provided.

   The compressor 12 compresses the sucked refrigerant to high temperature and high pressure and discharges it. The compressor 12 includes a compression mechanism for compressing and discharging the sucked refrigerant. This compression mechanism is driven by, for example, an electric motor. The refrigerant suction port of the compressor 12 communicates with the outlet of the refrigerant passage of the evaporator 48 through the pipe and the connecting portion 19. Further, the refrigerant suction port of the compressor 12 is also communicated with the refrigerant outlet pipe 35 via the pipe and the connecting portion 19. The connecting portion 19 simply communicates the outlet of the refrigerant passage of the evaporator 48, the refrigerant outlet pipe 35, and the refrigerant inlet of the compressor 12. The refrigerant discharge port of the compressor 12 communicates with the inlet of the refrigerant passage of the water-refrigerant heat exchanger 14 via the refrigerant introduction pipe 36.

   The water-refrigerant heat exchanger 14 has a coolant passage and a coolant passage, and these passages are configured to come into contact with each other so that heat can be exchanged over a large area. The inlet of the refrigerant passage communicates with the discharge port of the compressor 12, and the outlet of the refrigerant passage communicates with a refrigerant outlet pipe 33 provided with an orifice opening / closing valve 22. The inlet of the coolant passage is connected to the three-way valve 18 via a pipe, and the outlet of the coolant is connected to the check valve 20 via a pipe.

   While the compressor 12 is driven, high-temperature and high-pressure refrigerant flows through the water-refrigerant heat exchanger 14, while the coolant is switched between a flow-on state and a stopped state by switching the three-way valve. When the coolant flows, heat is radiated from the high-temperature and high-pressure refrigerant to the coolant, and when the coolant stops, the high-temperature and high-pressure refrigerant passes through the water-refrigerant heat exchanger 14 at almost the same temperature.

   The three-way valve 18 switches the coolant introduced from the coolant introduction pipe 31 to one of the water refrigerant heat exchanger 14 side and the coolant lead-out pipe 32 side by electrical control.

   The check valve 20 prevents the backflow of the coolant to the water refrigerant heat exchanger 14.

   In this embodiment, the three-way valve 18 and the check valve 20 correspond to a coolant switching valve that switches whether to bypass the coolant to the water-refrigerant heat exchanger 14.

   The orifice open / close valve 22 corresponds to an open / close valve with an expansion valve function. The orifice open / close valve 22 is an open / close valve that functions as an expansion valve during heating operation, and its state is switched by electrical control by the control unit 38. The on-off valve 22 with an orifice has, for example, a large-diameter passage and an orifice having a small-diameter passage so that the large-diameter passage can be opened and closed. The on-off valve 22 with the orifice allows the refrigerant to pass through when the large-diameter passage is opened, and allows the high-pressure refrigerant to pass through the small-diameter passage when the large-diameter passage is closed and only the orifice passage is passed. Inflate. The expanded refrigerant becomes a low-temperature and low-pressure refrigerant.

In place of the on-off valve 22 with an orifice, a path that bypasses the on-off valve and the on-off valve is provided, and an orifice is installed in the bypassed path so that the same function as the on-off valve 22 with an orifice can be provided. is there. Alternatively, an electronic expansion valve may be set to allow the refrigerant to pass as it is when fully opened and adjust the opening of the electronic expansion valve to serve as an expansion valve. Both are equivalent to on-off valves with expansion valve function.

   The refrigerant introduction pipe 34 communicates with the input port of the accumulator 16 via the on-off valve 24. The output port of the accumulator 16 communicates with the refrigerant outlet pipe 35. The on-off valve 24 opens and closes a passage between the refrigerant introduction pipe 34 and the input port of the accumulator 16 by electrical control by the control unit 38.

   The accumulator 16 separates the gas-phase and liquid-phase refrigerants and sends only the gas-phase refrigerant to the compressor 12 via the refrigerant outlet pipe 35.

   The three-way valve 18, the orifice-equipped on-off valve 22, and the on-off valve 24 are switched in state by, for example, an electrical signal sent from a control device for a vehicle air conditioner. Alternatively, the three-way valve 18, the orifice open / close valve 22, and the open / close valve 24 are configured such that the control unit 38 of the vehicle heat pump device 10 outputs a signal in response to a command from the vehicle air conditioner control device, and the state is switched. It is good.

   The housing 26 houses the water-refrigerant heat exchanger 14, the accumulator 16, the three-way valve 18, the check valve 20, the on-off valve 22 with an orifice, and the on-off valve 24, and packages these components integrally. The periphery of the housing 26 may be insulated.

   The refrigerant outlet pipe 33 and the refrigerant outlet pipe 35 correspond to a first refrigerant outlet section and a second refrigerant outlet section of the vehicle heat pump device 10, respectively. The refrigerant introduction pipe 36 and the refrigerant introduction pipe 34 correspond to a first refrigerant introduction part and a second refrigerant introduction part of the vehicle heat pump device 10, respectively. One ends of the refrigerant outlet pipes 33 and 35 and the refrigerant inlet pipes 34 and 36 are exposed to the outside of the housing 26 and are connected to the refrigerant pipe of the vehicle air conditioner. One end of each of the refrigerant outlet pipes 33 and 35 and the refrigerant inlet pipes 34 and 36 may be provided with a connector or socket for pipe connection.

   The engine cooler 40 and the heater core 44 are connected in series between the coolant outlet tube 32 and the coolant inlet tube 31. An outdoor heat exchanger 56 and an evaporator 48 are connected in series between the refrigerant outlet tube 33 and the suction port of the compressor 12 in this order.

   Further, the refrigerant passage connecting the evaporator 48 and the suction port of the compressor 12 is also connected to the refrigerant outlet pipe 35. Further, the refrigerant passage between the outdoor heat exchanger 56 and the evaporator 48 is branched and connected to the refrigerant introduction pipe 34. Details will be described below.

   The coolant introduction pipe 31 and the coolant lead-out pipe 32 correspond to the coolant introduction part and the lead-out part of the vehicle heat pump device 10, respectively. One end of the coolant introduction pipe 31 and the coolant discharge pipe 32 is exposed to the outside of the housing 26 and is connected to the coolant pipe of the vehicle air conditioner. A connector or a socket for connecting pipes may be provided at one end of the coolant introduction pipe 31 and the coolant discharge pipe 32.

   The engine cooler 40 includes a water jacket for flowing a coolant around the internal combustion engine and a pump for flowing the coolant to the water jacket, and releases heat from the internal combustion engine to the coolant flowing in the water jacket. The inlet and outlet of the coolant passage of the water jacket communicate with the heater core 44 and the coolant introduction pipe 31 of the vehicle heat pump device 10, respectively.

   The heater core 44 is a device that performs heat exchange between the coolant and air, and is disposed in the intake passage B of the HVAC 70 that supplies air into the vehicle interior. The coolant passage of the heater core 44 communicates with the engine cooler 40 and the coolant outlet tube 32 of the vehicle heat pump apparatus 10. Outside air or the like is introduced into the intake passage B of the HVAC 70 by the fan F2.

   The evaporator 48 is a device that performs heat exchange between the refrigerant expanded to low temperature and low pressure and air, and is disposed in the intake passage B of the HVAC 70. When the refrigerant expanded to low temperature and low pressure passes through the evaporator 48, it absorbs heat from the air and vaporizes. The inlet of the refrigerant passage of the evaporator 48 communicates with the outdoor heat exchanger 56 through a pipe with the expansion valve 52 and the on-off valve 60 interposed therebetween. The outlet of the refrigerant passage of the evaporator 48 communicates with the suction port of the compressor 12 through the pipe and the connecting portion 19.

   The expansion valve 52 expands the high-pressure refrigerant to a low temperature and low pressure and discharges it to the evaporator 48. The expansion valve 52 is connected to a position close to the evaporator 48 outside the vehicle heat pump device 10.

   The outdoor heat exchanger 56 has a passage through which refrigerant flows and a passage through which air flows. For example, the outdoor heat exchanger 56 is disposed near the top of the vehicle in the engine room, and exchanges heat between the refrigerant flowing through each passage and the outside air. Do. The inlet of the refrigerant passage of the outdoor heat exchanger 56 communicates with the refrigerant outlet pipe 33 of the vehicle heat pump device 10 via a pipe. Further, the outlet of the refrigerant passage branches into two pipes in the middle and communicates with the evaporator 48 and one refrigerant introduction pipe 34 of the vehicle heat pump device 10.

   In the outdoor heat exchanger 56, a low-temperature and low-pressure refrigerant flows during the heating operation and absorbs heat from the outside air, and during the cooling operation, a high-temperature and high-pressure refrigerant flows and releases heat to the outside air. Outside air is blown onto the outdoor heat exchanger 56 by, for example, a fan F1.

   The on-off valve 60 is provided in the middle of a pipe for flowing the refrigerant from the outdoor heat exchanger 56 to the evaporator 48, and opens and closes this passage by electrical control.

[Cooling operation]
Drawing 2 is a figure explaining operation at the time of air conditioning operation in the air-conditioner for vehicles of an embodiment. The shaded portion of the piping in the figure indicates that there is no refrigerant or coolant flow.

   During the cooling operation, the on-off valve 24 is closed, the on-off valve 60 is opened, the on-off valve 22 with an orifice is opened, and the water refrigerant heat exchanger 14 side of the three-way valve 18 is switched to closed.

   By this switching, the coolant circulates between the engine cooler 40 and the heater core 44, while the coolant does not flow to the water refrigerant heat exchanger 14. In the intake passage B in the HVAC 70, the air mix damper is switched so that the air does not flow through the heater core 44, so that the air supplied to the passenger compartment is not heated.

   The refrigerant is compressed to a high temperature and a high pressure by the compressor 12, and then passes through the water refrigerant heat exchanger 14 at a high temperature and is sent to the outdoor heat exchanger 56. Thereafter, the refrigerant is cooled by the outdoor heat exchanger 56, passes through the expansion valve 52, expands to a low temperature and a low pressure, and then is sent to the evaporator 48. In the evaporator 48, heat is absorbed from the air sent into the passenger compartment to the refrigerant, thereby cooling the air and vaporizing the refrigerant. The vaporized refrigerant is returned to the compressor 12.

   By such a heat pump cycle, cold air can be sent into the passenger compartment.

[Heating operation]
Drawing 3 is a figure explaining operation at the time of heating operation in an air-conditioner for vehicles of an embodiment. The shaded portion of the piping in the figure indicates that there is no refrigerant or coolant flow.

   During the heating operation, the on-off valve 24 is opened, the on-off valve 60 is closed, the orifice-equipped on-off valve 22 is closed, and the coolant outlet pipe 32 side of the three-way valve 18 is switched to closed.

   By this switching, the coolant circulates through the engine cooler 40, the water / refrigerant heat exchanger 14, and the heater core 44. During this time, the coolant is heated by the engine cooler 40 and the water / refrigerant heat exchanger 14 and radiates heat to the air flowing through the intake passage B in the HVAC 70 by the heater core 44.

   Further, in the vehicle heat pump device 10, the heat generated by the compressor 12 is transmitted to the cooling water by the water / refrigerant heat exchanger 14.

   In the intake passage B, the air mix damper or the like is switched so that the air flows through the heater core 44, and the air sent into the passenger compartment is warmed.

   The refrigerant is compressed to a high temperature and a high pressure by the compressor 12 and then passes through the water refrigerant heat exchanger 14 to radiate heat to the coolant. The high-pressure refrigerant after heat radiation passes through the orifice-equipped on-off valve 22 and expands to a low temperature and low pressure, and is sent to the outdoor heat exchanger 56. In the outdoor heat exchanger 56, heat is absorbed from the outside air to the refrigerant, and the refrigerant is vaporized. The vaporized refrigerant is returned to the compressor 12 via the accumulator 16. No refrigerant flows through the evaporator 48, and no heat exchange is performed there.

   With such an operation, warm air can be sent into the passenger compartment. The warm air effectively uses the heat of the engine, and the heat pump cycle compensates for the lack of engine heat. Further, the exhaust heat of the compressor 12 is also effectively used to warm the air. Since heating of air uses a heat pump cycle, power consumption relative to the amount of heating is kept low.

[Comparison of piping routes]
FIG. 4 is a diagram illustrating a change in refrigerant piping from a conventional vehicle air conditioner. In the figure, a solid line indicates the piping of a conventional vehicle air conditioner.

[In the case of conventional vehicle air conditioners]
In the conventional vehicle air conditioner that uses the heat pump cycle only during the cooling operation, the outdoor heat exchanger 56 is disposed near the top of the vehicle in the engine room, and the intake passage B, the heater core 44, and the evaporator 48 are disposed in the HVAC 70 in the vehicle interior. The Further, the compressor 12 is disposed in the engine room.

   In this configuration, the refrigerant piping is as shown by the solid line in FIG. That is, a pipe P1 connected from the head outdoor heat exchanger 56 in the engine room to the evaporator 48 through the expansion valve 52, a pipe P2 connected from the compressor 12 to the outdoor heat exchanger 56, and a vehicle interior Only the pipe P3 connected from the evaporator 48 to the compressor 12 is provided.

   The pipes P1 to P3 are laid out so as to be as straight as possible so as not to increase the pressure loss of the refrigerant while avoiding each configuration of the vehicle. In particular, the piping P1 provided over a long section may be designed so that it can be preferentially a straight path.

   The coolant pipes W <b> 1 and W <b> 2 are provided between the engine cooler 40 in the engine room and the heater core 44 in the HVAC 70.

Next, the case where the conventional vehicle air conditioner that uses the heat pump cycle only during the cooling operation is changed by using the vehicle heat pump device 10 so that the heating operation using the heat pump cycle can also be performed will be described.

   As a change from the previous pipe, two refrigerant pipes P21 and P22 are added. The refrigerant pipe P21 is connected to the refrigerant outlet pipe 35 of the vehicle heat pump apparatus 10, and the refrigerant pipe P22 is connected to the refrigerant introduction pipe 34 of the vehicle heat pump apparatus 10.

   Further, a part P2b of the long pipe P2 provided across the engine room is removed. After the piping P2b is removed, the refrigerant discharge port side of the compressor 12 of the piping P2 is referred to as piping P2a, and the outdoor heat exchanger 56 side of the piping P2 is referred to as piping P2c.

   The refrigerant pipe P2a is connected to the refrigerant introduction pipe 36 of the vehicle heat pump apparatus 10, and the refrigerant pipe P2c is connected to the refrigerant outlet pipe 33 of the vehicle heat pump apparatus 10.

   Between the vehicle heat pump device 10 and the heater core 44, pipes W21 and W22 for circulating the heated coolant are provided. These pipes W21 and W22 are connected so as to divide and bypass a part W1a of the pipe W1 communicating with the engine cooler 40, for example. The pipe W21 is connected to the coolant introduction pipe 31, and the pipe W22 is connected to the coolant discharge pipe 32.

   Heat is radiated from the high-temperature and high-pressure refrigerant compressed by the compressor 12 to the coolant in the water-refrigerant heat exchanger 14 in the vehicle heat pump device 10. This heat is transmitted to the heater core 44 that warms the air in the intake passage B in the HVAC 70.

   For example, using a compressor disclosed in Patent Document 1 and a water refrigerant heat exchanger housed in the same housing (see FIGS. 21 to 24 of Patent Document 1), the heat pump cycle is performed only during cooling operation. Consider the case of changing the conventional vehicle air conditioner that uses the heat pump so that the heating operation using the heat pump cycle can also be performed.

   In this case, it is necessary to replace the compressor included in the conventional vehicle air conditioner with an apparatus in which the compressor and the water refrigerant heat exchanger are housed in the same casing. For this reason, it is necessary to greatly change the piping pattern around the compressor.

[In the case of this embodiment]
On the other hand, in the configuration of the present embodiment, as can be seen from the comparison between FIG. 1 and FIG. 4, the change in the refrigerant pipe from the conventional vehicle air conditioner is that the refrigerant pipes P21 and P22 are added and the pipe P2 is changed. It is only necessary to arrange the vehicle heat pump device 10 in a portion from which a part of the piping P2b is removed.

   Furthermore, since the arrangement of the compressor is not changed, it is possible to easily perform the heating operation using the heat pump cycle while reducing the change points of the refrigerant piping pattern.

   As described above, according to the vehicle heat pump apparatus 10 and the vehicle air conditioner of the present embodiment, two pipes are added to the pipe of the conventional vehicle air conditioner that uses the heat pump cycle only during the cooling operation, and a part of the pipes It becomes possible to perform the heating operation using the heat pump cycle only by removing the water.

   Therefore, the present embodiment is particularly effective when a vehicle air conditioner capable of heating operation by a heat pump cycle is installed by a minor change or option change on a vehicle in which a conventional vehicle air conditioner is adopted. Become. That is, if only the space for the vehicle heat pump device 10 and the additional refrigerant pipes P21 and P22 is provided, the vehicle air conditioner of the present embodiment is applied without affecting the layout of the other components of the vehicle. Is possible. As will be described later, the vehicle heat pump device 10 can be configured as a relatively small device, and can be easily disposed between components of a conventional vehicle air conditioner.

[Modification 1]
FIG. 5 is a configuration diagram illustrating a modification of the vehicle heat pump device and the vehicle air conditioner according to the embodiment of the present invention.

   As shown in FIG. 5, the vehicle heat pump device 10 according to the embodiment of the present invention includes all or one of the on-off valve 24, the on-off valve 22 with an orifice, the three-way valve 18, and the check valve 20. It may be provided outside.

   The two on-off valves 24 and 60 can be replaced by providing a three-way valve at the branch points d1 and d2 of the refrigerant pipe.

   Furthermore, the configuration for switching whether or not to bypass the coolant to the water-refrigerant heat exchanger 14 is not limited to the three-way valve 18 and the check valve 20, and can be configured using a plurality of on-off valves.

[Modification 2]
FIG. 6 is a configuration diagram illustrating a modification of the vehicle heat pump device and the vehicle air conditioner according to the embodiment of the present invention. The difference from FIG. 5 is that the two on-off valves 24 and 60 in FIG. 5 are replaced with one three-way valve 21.

   The three-way valve 21 is electrically controlled. The three-way valve 21 sends the refrigerant that has passed through the outdoor heat exchanger 56 only to the evaporator 48 side during the cooling operation. In addition, the three-way valve 21 sends the refrigerant that has passed through the outdoor heat exchanger 56 during heating operation only to the side connected to the refrigerant introduction pipe 34 of the vehicle heat pump device 10.

   The embodiment of the present invention has been described above.

   The compressor 12 in the above embodiment may include an electric motor for driving a compression mechanism that compresses and discharges the sucked refrigerant. The compressor 12 in the above embodiment may drive the compression mechanism by transmitting a driving force outside the compressor 12 such as a driving force of the internal combustion engine by a belt or the like.

   In the above embodiment, a tubular configuration has been described as an example of the refrigerant introduction part or the refrigerant lead part of the vehicle heat pump device 10, but the refrigerant introduction part or the refrigerant lead part is, for example, a connector for pipe connection or The socket may be embedded in the wall of the housing 26. The same applies to the inlet or outlet of the coolant.

   In the above-described embodiment, the configuration in which the coolant supplied with heat from the internal combustion engine is supplied to the heater core is described as an example. However, the heater core 44 employs a configuration in which only the coolant of the vehicle heat pump device 10 flows. Also good.

Moreover, the vehicle air conditioner and the vehicle heat pump device according to the above-described embodiment may be newly installed in an automobile. Moreover, the vehicle heat pump of the said embodiment is good also as a structure replaced with a part of conventional vehicle air conditioner which uses a heat pump cycle only at the time of cooling operation as shown in FIG. By this replacement, the vehicle air conditioner of the present embodiment is realized, and the heating operation by the heat pump cycle becomes possible.

   The present invention can be used for a vehicle heat pump device and a vehicle air conditioner mounted on a vehicle.

DESCRIPTION OF SYMBOLS 10 Vehicle heat pump apparatus 12 Compressor 14 Water refrigerant | coolant heat exchanger 16 Accumulator 18 Three-way valve 19 Connection part 20 Check valve 21 Three-way valve 22 Open / close valve with orifice 24 Open / close valve 26 Housing 31 Coolant introduction pipe 32 Coolant outlet pipe 33, 35 Refrigerant outlet tube 34, 36 Refrigerant inlet tube 38 Control unit 40 Engine cooler 44 Heater core 48 Evaporator 52 Expansion valve 56 Outdoor heat exchanger 60 On-off valve B Intake passage F1, F2 Fan

Claims (10)

A vehicle heat pump device that uses and introduces a high-temperature and high-pressure refrigerant discharged from a compressor that compresses the refrigerant sucked outside the housing,
A first refrigerant introduction section for introducing the high-temperature and high-pressure refrigerant discharged from the compressor from the outside of the housing;
A water-refrigerant heat exchanger that is housed in the housing and is capable of radiating heat to the coolant from the high-temperature and high-pressure refrigerant introduced from the first refrigerant introduction part;
A coolant introduction part capable of introducing the coolant from the outside of the housing to the water refrigerant heat exchanger;
A coolant lead-out portion capable of leading the coolant from the water-refrigerant heat exchanger to the outside of the housing;
A first refrigerant deriving unit for deriving the refrigerant that has passed through the water refrigerant heat exchanger to the outside of the housing;
The coolant introduced from the coolant introduction part is sent to the coolant lead-out part through the water refrigerant heat exchanger or sent through the water refrigerant heat exchanger without passing through the water refrigerant heat exchanger. Whether to send to the same coolant outlet as the coolant outlet, or a coolant switching valve that can be switched,
A vehicle heat pump device. The on-off valve with an expansion valve function that can be switched between expanding the refrigerant that has passed through the water-refrigerant heat exchanger and sending it to the first refrigerant deriving unit, or sending it to the first refrigerant deriving unit with high pressure. The vehicle heat pump device according to claim 1, further comprising: A second refrigerant introduction part for introducing a low-pressure refrigerant from the outside of the housing;
An accumulator for separating the low-pressure refrigerant introduced from the second refrigerant introduction part into a gas-phase and liquid-phase refrigerant;
A second refrigerant deriving unit for deriving the gas-phase refrigerant separated by the accumulator to the compressor;
Further comprising
The vehicle heat pump device according to claim 2, wherein the accumulator is housed in the housing. The vehicle heat pump device according to claim 3, further comprising an on-off valve between the second refrigerant introduction portion and the accumulator. The vehicle heat pump device according to claim 4, wherein the on-off valve and the on-off valve with an expansion valve function are housed in the housing. The vehicle heat pump device according to any one of claims 1 to 5, wherein the vehicle heat pump device is exchanged with a part of a vehicle air conditioner that uses a heat pump cycle only during cooling operation to enable heating operation by the heat pump cycle. A compressor for compressing and discharging the sucked refrigerant;
An internal combustion engine cooler that absorbs heat from the internal combustion engine of the vehicle into the coolant;
A heat exchanger for heating that releases heat from the high-temperature coolant to the air sent to the passenger compartment;
An outdoor heat exchanger that performs heat exchange between the refrigerant and air outside the passenger compartment,
The vehicle heat pump device according to claim 1,
Comprising
The internal combustion engine cooler and the heating heat exchanger are connected in series between the coolant outlet and the coolant inlet of the vehicle heat pump device,
The outdoor heat exchanger is connected to the first refrigerant outlet of the vehicle heat pump device;
A vehicle air conditioner in which a discharge port of the compressor is connected to a first refrigerant introduction part of the vehicle heat pump device. A compressor for compressing and discharging the sucked refrigerant;
An internal combustion engine cooler that absorbs heat from the internal combustion engine of the vehicle into the coolant;
A heat exchanger for heating that releases heat from the high-temperature coolant to the air sent to the passenger compartment;
An outdoor heat exchanger that performs heat exchange between the refrigerant and air outside the passenger compartment,
An evaporator that absorbs heat from air sent to the passenger compartment into a low-temperature refrigerant;
A heat pump device for a vehicle according to claim 5;
Comprising
The internal combustion engine cooler and the heating heat exchanger are connected in series between the coolant outlet and the coolant inlet of the vehicle heat pump device,
The outdoor heat exchanger and the evaporator are connected in series between the first refrigerant outlet of the vehicle heat pump device and the suction port of the compressor,
A discharge port of the compressor is connected to the first refrigerant introduction part of the vehicle heat pump device;
Connecting a refrigerant passage connecting the evaporator and the suction port of the compressor to the second refrigerant outlet portion of the vehicle heat pump device;
A vehicle air conditioner in which a refrigerant passage between the outdoor heat exchanger and the evaporator is branched and connected to the second refrigerant introduction unit. Further comprising an expansion valve for expanding the high-pressure refrigerant and sending it to the evaporator;
The vehicle air conditioner according to claim 8, wherein the expansion valve is arranged outside the vehicle heat pump device and upstream of the evaporator. An open / close valve capable of opening and closing a refrigerant passage between the outdoor heat exchanger and the evaporator;
The vehicle air conditioner according to claim 8 or 9.

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