JPH0616031A - Heat pump type air conditioning system - Google Patents

Abstract

PURPOSE:To quickly raise temperature in a carbon by quickening the startup of a heat pump type air conditioning system for an electric automobile to rapidly raise the interior temperature, and thereby to lighten. CONSTITUTION:A basic refrigerant circuit is made up of a compressor 1, a capacitor 2, an expansion valve 3, and of an evaporator 4. An electromagnetic valve 7 at the refrigerant inlet side of the compressor 1 and an electromagnetic valve 8 at the refrigerant outlet side of the capacitor 2 are provided so as to be closed when the operation of the compressor 1 is suspended, and pressurized refrigerant is sealed in a refrigerant passage between the electromagnetic valves, so that a normal operation can immediately be started again. In order to prevent sealed refrigerant from being lowered in pressure, the inlet 6a and the outlet 6b of a ventilation duct 6 are closed by dampers 11 and 12, the inside of the ventilation duct 6 is heated with heat fluid supplied to a heat exchanger 9 from a heat accumulator 13, and refrigerant is kept warm with heat fluid supplied to a warmer 10 covering the refrigerant passage. Additional heat can be supplied by the heat accumulator 13 even while a system is in normal operation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat pump type air conditioner system for an electric vehicle, and more particularly to an air conditioner system of this type suitable for use in cold regions.

[0002]

2. Description of the Related Art In order to prevent air pollution or global warming, electric vehicles equipped with a storage battery and an electric motor have been reexamined as an alternative to vehicles equipped with an internal combustion engine. The heat for air conditioning, especially for heating, in an automobile can be easily obtained by utilizing the waste heat of the internal combustion engine in the case of a vehicle equipped with the internal combustion engine, but it is considered as an alternative to the waste heat of the internal combustion engine in the electric vehicle. The heat generated by the electric motor is insufficient for heating, and cannot be sufficiently heated by itself.Therefore, an electric vehicle uses a so-called heat pump type air conditioner equipped with a refrigeration circuit and is stored in a storage battery. A method of driving the compressor of the heat pump type air conditioner with the electric power to condense the heat of the outside air and take it into the vehicle interior is generally adopted.

[0003]

However, when a heat pump type air conditioner for an electric vehicle is used in a cold region where the outside air temperature is low, when the air conditioner is started, the interior of the vehicle and each part constituting the refrigeration circuit of the air conditioner are completely cooled. In addition to the large heating load, it takes a considerably long time to start up as is the case with heat pump type air conditioners, and since the outside air temperature is low, the efficiency (coefficient of performance) decreases, and when the outside air temperature is high, However, because of the disadvantage that the heating capacity is reduced, it is not possible to quickly raise the temperature in the vehicle interior to a target value, while consuming a large amount of electric power.

In addition, in the case of an electric vehicle, a storage battery for a running electric motor is commonly used as a power source of an electric motor for driving a compressor of a heat pump type air conditioner, but an increase in the weight of the storage battery is avoided as much as possible. Due to the general demand for electric vehicles and the restrictions on the volume of the vehicle body that houses the storage battery, there is a limit to increasing the electric capacity of the storage battery. If one is used to drive the compressor of a heat pump type air conditioner, the mileage of the electric vehicle will be shortened accordingly and the acceleration performance will deteriorate due to the increase in weight. For storage-battery electric vehicles where short cruising distance and low acceleration performance pose problems, heat pump air conditioners Amount of power consumption is that it is a problem that can not be ignored.

As described above, when a heat pump type air conditioner is mounted on an electric vehicle, there are some problems, but nevertheless, the heat pump type air conditioner generates Joule heat from electric power stored in a storage battery by an electric resistor. Compared with the case, the efficiency is also high, and since it has the great feature that it can be used as it is as a cooling device by switching the flow direction of the refrigerant in the refrigeration circuit to the opposite direction, so in general it is a heat pump type in an electric vehicle. It is advisable to use the air conditioner.

Therefore, one of the objects of the present invention is to shorten the time required for starting up a heat pump type air conditioner system used in an electric vehicle equipped with a storage battery as much as possible. And another object of the present invention is to make it possible to quickly raise the temperature inside the compartment of the electric vehicle to the target temperature within a short time, and yet another object is the electric power of the storage battery by the air conditioner. To reduce the electric capacity, weight, and volume of the storage battery installed in the electric vehicle, and thus to increase the cruising range of the electric vehicle as compared with the conventional one, or to improve the acceleration performance. It is to improve than before.

[0007]

As a means for achieving the above-mentioned object, the present invention provides a specific section of a refrigerant passage from the compressor to a condenser when the compressor of the refrigeration circuit is stopped, in addition to the refrigeration circuit. So as to be able to shut off the portion of the condenser, the pair of valves provided on the refrigerant inlet side of the compressor and the refrigerant outlet side of the condenser, and the condenser of the condenser in the ventilation duct for guiding the air heated by the condenser. A heat exchanger provided on the upstream side and a pair of small closed circuits provided on the inlet side and the outlet side of the ventilation duct and selectively closing them to form a small closed circuit in which air circulates in the ventilation duct. A damper and a heat retainer formed to cover the refrigerant passage between the pair of valves including the compressor; and Characterized in that it comprises a heat accumulator capable of storing heat to be supplied to one of the serial heat exchanger or the warmer, provides a heat pump type air conditioner system for an electric vehicle.

[0008]

When the operation of the compressor of the heat pump type air conditioner is stopped, the pair of valves provided on the refrigerant inlet side of the compressor and the refrigerant outlet side of the condenser are closed at the same time, so that the refrigerant passage from the compressor to the condenser is closed. The specific section is cut off from the other parts of the refrigeration circuit, and the high temperature, high pressure refrigerant pressurized during the operation of the compressor is contained in this section. Therefore, close the pair of dampers provided on the inlet and outlet sides of the ventilation duct,
A small closed circuit in which air circulates in the ventilation duct, and the temperature of the condenser is increased by heating the air in the ventilation duct by supplying heat from the heat storage device to the heat exchanger installed on the upstream side of the condenser. Keep it warm so that it does not drop. On the other hand, heat is also supplied from the heat accumulator to the heat retaining device formed to cover the refrigerant passage between the pair of valves, including the compressor, to prevent the temperature of the refrigerant in these parts from decreasing. By operating in this manner, the high temperature, high pressure refrigerant during the operation of the compressor is always retained in the refrigerant passage between the pair of valves while the compressor is stopped.

Next, when the drive of the compressor is started to restart the heating operation of the heat pump type air conditioner system, the pair of valves which are closed before and after the specific section of the refrigerant passage are opened to open the refrigeration circuit. Further, the damper, which has closed the inlet and the outlet of the ventilation duct, is also opened to communicate the ventilation duct with the inside of the vehicle compartment, so that the air to be heated flows into the ventilation duct. As a result, the high-temperature, high-pressure refrigerant held in the specific section of the refrigerant passage immediately heats the air in the ventilation duct in the condenser, which is a drawback of the heat pump air conditioner system, which is long for start-up. Without waiting time, the air heated from the beginning flows into the passenger compartment to raise the temperature.

In this way, even after the rapid start of steady operation, if the inside of the passenger compartment is completely cold, or if the outside temperature is too low and the heat pump type air conditioner system alone causes a slow rise in the inside of the passenger compartment, ventilation is provided. The heat from the heat accumulator is continuously supplied to the heat exchanger in the duct to help raise the temperature in the passenger compartment. In some cases, the heat supply from the heat accumulator can be continued even in the normal operating state, and the work of the compressor can be reduced by that amount, thereby reducing the power consumption of the storage battery that drives the compressor.
In that case, it becomes possible to extend the cruising range of the electric vehicle by reducing the burden on the storage battery.

[0011]

FIG. 2 is a schematic diagram showing the basic structure of a heat pump type air conditioner in the prior art. Reference numeral 1 denotes a compressor for compressing a low-temperature, low-pressure gaseous refrigerant to be sucked into a high-temperature, high-pressure gaseous refrigerant, and 2 for cooling the compressed high-temperature, high-pressure gaseous refrigerant, condensing and liquefying it. The condenser 3 that takes out the condensation heat generated at the time and gives the heat to the air in the passenger compartment to raise the temperature is sprayed from a narrow passage to atomize the liquid refrigerant in order to form a pressure stage in the refrigeration circuit. The expansion valve 4 causes the refrigerant in a gas-liquid mixed state, which is injected from the expansion valve 3, to exchange heat with the outside air and expand until it becomes a gas state. At that time, the evaporator 4 that causes the refrigerant to absorb the heat of the outside air as vaporization heat is used. Shown respectively. The refrigeration circuit of the heat pump type air conditioner has the equipment of each of these parts,
It is composed of a series of pipes that connect them and allow a gaseous or liquid refrigerant to flow in a predetermined direction.

The condenser 2 is installed in a ventilation duct 6 in series with a ventilation fan 5 which is rotationally driven by an electric motor. As shown by the arrow in FIG. 2, the ventilation duct 6 sucks the air in the vehicle compartment from the inlet 6a by the fan 5, or at that time, takes in new air from the outside and sends it to the condenser 2, and in the condenser 2, the compressor By exchanging heat with the high-temperature, high-pressure gaseous refrigerant compressed by 1 (cooling the refrigerant in this case), the heat of condensation of the refrigerant is absorbed by air to raise the temperature,
The hot air is sent from the outlet 6b into the passenger compartment,
Raise the temperature inside the vehicle.

When a heat pump type air conditioner is used in a cold region, etc., when the heat pump type air conditioner is started up and the equipment and the refrigerant of each part constituting the refrigeration circuit are completely cooled, the compressor 1 is initially driven. It is not possible to supply high-temperature, high-pressure refrigerant to the condenser 2, and it takes a considerably long time to start up until the normal heating operation state is reached, and even when the normal heating operation state is entered, the temperature of the outside air remains unchanged. When the temperature is low, the amount of heat that can be absorbed by the refrigerant in the evaporator 4 is small. Therefore, even when the same electric power is consumed to drive the compressor 1 as compared with the case where the outside air temperature is relatively high, the condenser 2 has The amount of heat taken into the air inside the passenger compartment is relatively small, and as a result, it is not possible to exert sufficient heating capacity. It is customary of air conditioners.

An embodiment of the present invention which can solve these problems is shown in FIG. Also in the embodiment of the present invention, the components of the basic refrigeration circuit are indicated by the same reference numerals as those of the conventional one shown in FIG. One of the features of this embodiment is that an electromagnetic valve 7 that can open and close the refrigerant passage is provided between the evaporator 4 and the compressor 1, and a refrigerant passage is also provided between the condenser 2 and the expansion valve 3. A solenoid valve 8 that can be opened and closed is provided. As a result, the solenoid valves 7 and 8 are closed at the same time, not only when the electric vehicle is parked at night, but also when the operation of the compressor 1 is temporarily stopped when the temperature inside the vehicle reaches a predetermined value. The valve shuts off the refrigeration circuit and the refrigerant passage between the solenoid valves 7 and 8 including the compressor 1 and the condenser 2 is disconnected from the rest of the refrigeration circuit and compressed by the compressor 1 therein. It is possible to contain high-pressure refrigerant.

In order to maintain the high pressure by keeping the refrigerant contained in the condenser 2 warm,
Alternatively, a heat exchanger 9 is provided in the ventilation duct 6 on the upstream side of the air flowing into the condenser 2 for the purpose of additionally supplying heat to the air in the vehicle compartment through the condenser 2 to supplement the heating capacity. When the ventilation duct 6 is in a closed circuit, a high-temperature heat fluid from a heat storage device described later is supplied to the heat exchanger 9 to heat the air, thereby indirectly compressing the heat in the condenser 2. The temperature of the generated refrigerant can be maintained relatively high (heat retention). The ventilation duct 6
Is preferably made of synthetic resin having heat insulating properties, or is provided with heat insulating properties by covering with a heat insulating material.

In addition to providing a heat exchanger 9 to indirectly heat the condenser 2, the refrigerant passage extending from the solenoid valve 7 to the solenoid valve 8 and the outside of the compressor 1 between them are further provided with the heat exchanger 9. A cover-shaped heat insulator 10 made of a heat insulating material or the like is provided to supply a high-temperature hot fluid from a later-described heat accumulator also to a gap formed inside, and a high-temperature, high-pressure refrigerant to be confined in this section is supplied. Directly heat and keep warm with hot fluid.

The drive of the compressor 1 is stopped, and the solenoid valve 7
And 8 are closed and the refrigerant enclosed between the solenoid valves 7 and 8 is kept warm by the warmer 10, in order to effectively keep the heat of the condenser 2 by the heat exchanger 9, ventilation is performed. Advantageously, the duct 6 is also separated from the passenger compartment to form a small closed circuit. In that sense, in the illustrated embodiment, dampers 11 and 12 are provided at the inlet and the outlet of the ventilation duct 6 that communicate with the interior of the vehicle. Dampers 11 and 1
2 is rotated about pivots 11a and 11b, respectively, so that the inlet 6 of the ventilation duct 6 is rotated as shown in FIG.
a and the outlet 6b are closed to make the air passage in the ventilation duct 6 into a small closed circuit, or the inlet 6a and the outlet 6b of the ventilation duct 6 are opened to make them as if they were the ventilation duct 6 shown in FIG. To communicate with.

In order to supply a heat fluid such as hot water to the heat exchanger 9 and the heat insulator 10, in the heat pump type air conditioner system of the illustrated embodiment, the heat exchanger 9 and the heat insulator 10 are connected by reciprocating pipes, respectively. Accumulator 1 connected to
3 is provided. Further, pumps 14 or 15 are provided in the respective pipes leading to the heat exchanger 9 and the heat retaining device 10, and can be driven by the electric power of a storage battery (not shown). An electric heater 16 is provided in the heat storage device 13, and when an electric vehicle equipped with this heat pump type air conditioner system is parked at night or the like, at the same time as charging a storage battery (not shown), The electric heater 16 is connected to the external power supply 17 to heat the inside of the heat storage device 13, and the heat storage agent filled therein absorbs heat. Therefore, when the pump 14 or 15 is driven, the heat stored in the heat storage agent in the heat storage device 13 is transferred to the heat exchanger 9 and the heat retainer 10 by using the heat fluid such as hot water as a medium, and the heat of the solenoid valves 7 and 8 is increased. To keep the high-temperature, high-pressure refrigerant enclosed between them, and in some cases, to heat the air flowing through the ventilation duct 6 by the heat exchanger 9 and send it into the passenger compartment even while the compressor 1 is being driven. You can

In order to control the heat pump type air conditioner system of the embodiment shown in FIG. 1, an electronic control unit 1 incorporating, for example, a microcomputer in the system.
8 are provided. The electronic control unit 18 is a well-known one, and includes an input circuit 18a for inputting various signals, a central processing unit (CPU) for arithmetically processing the input signals, and a storage unit (ROM or RAM). ), A clock circuit, etc. (these are generally shown as a block 18b), and an output circuit 18c for outputting a control signal to a device controlled by the operation result. In the embodiment shown in FIG. 1, the input circuit 18a includes a temperature detecting element 19 for detecting the temperature in the heat accumulator 13, a temperature detecting element 20 for detecting the temperature of the thermal fluid discharged after being supplied to the heat retaining device 10, Temperature detection element 2 for detecting the temperature of the air downstream of the condenser 2 in the ventilation duct 6.
1 and the like are connected, and their detected values are input to the control device 18.

The output circuit 18c of the controller 18 has a fan 5, solenoid valves 7 and 8, and an electric heater 1 for the heat accumulator 13.
The switch drive circuit 22 for connecting and disconnecting the external power supply 17 connected to the drive circuit 6, the drive circuits 23 and 24 for controlling the drive of the pumps 14 and 15 are connected, and the operation of these devices is controlled by a command from the control device 18. Although not shown, the control signal from the output circuit 18c is also supplied to the actuator that drives the dampers 11 and 12 to open and close. However, when the dampers 11 and 12 are interlocked with a manual command device for starting and stopping the heating operation of the heat pump type air conditioning system, an actuator that is automatically operated by the output circuit 18c is provided for the dampers 11 and 12. No need.

The heat pump type air conditioner system illustrated in FIG. 1 has a controller 18 when the compressor 1 is stopped.
Automatically closes the solenoid valves 7 and 8 and causes high pressure in those sections including the compressor 1 and the condenser 2,
The temperature of the refrigerant is kept high by containing the high temperature refrigerant, closing the inlet 6a and the outlet 6b of the ventilation duct 6 by the dampers 11 and 12, and further heating and keeping the enclosed refrigerant by the heat exchanger 9 and the heat insulator 10. Eg 6
Maintain at 0 ° C. Thereby, next compressor 1
When the engine is restarted, it will be possible to immediately restore the refrigerant state that was almost the same as when it was stopped the previous time, and the time required to start up the heat pump type air conditioning system will be shortened, and operation that is close to steady operation from the beginning will be possible. It is a state.

Its operation will be explained in more detail by means of the two phase diagrams shown. FIG. 3 shows a state in which the compressor 1 of the heat pump type air conditioner system is stopped while the storage battery of the electric vehicle is being charged at night. In such a case, the control device 18 controls the switch drive circuit 2
2 by the external power supply 17 to the electric heater 1 in the regenerator 13
6, the internal heat storage agent is heated until the temperature detecting element 19 detects a predetermined temperature. When the temperature reaches a predetermined value, for example, a value slightly higher than 60 ° C., the electric heater 16 is intermittently controlled so as to maintain the temperature.

Simultaneously with the closing of the solenoid valves 7 and 8, the dampers 11 and 12 are rotated by an actuator (not shown) to close the inlet 6a and the outlet 6b of the ventilation duct 6 and drive the fan 5 even when the compressor 1 is stopped. By continuing the above, the closed flow of air is generated in the ventilation duct 6 as shown by the broken line in FIG. Further, the pump 14 is driven to supply the heat fluid heated in the regenerator 13 to the heat exchanger 9 to give heat to the air circulating in the ventilation duct 6,
As a result, feedback control is performed on the drive circuit 23 of the pump 14 and the fan 5 so that the refrigerant contained in the condenser 2 maintains 60 ° C. when the compressor 1 is stopped. This control is performed based on the detection value of the temperature detection element 21.

On the other hand, the pump 15 is driven to supply the heat fluid from the heat accumulator 13 into the heat retainer 10, and the refrigerant contained in the section from the solenoid valve 7 to the solenoid valve 8 of the refrigeration circuit is shut off. Similarly, feedback control is performed to maintain the temperature at 60 ° C. This is performed by controlling the drive circuit 24 of the pump 15 so as to keep the temperature detected by the temperature detecting element 20 at a predetermined value.

In this way, the refrigerant contained in the section between the solenoid valves 7 and 8 of the refrigeration circuit always maintains the temperature of 60 ° C., which is almost the same temperature as in the steady operation state, and its pressure remains high. Held in. The above description is for the case of charging the storage battery of an electric vehicle, but the compressor 1 is stopped when the temperature inside the vehicle reaches an appropriate temperature during running or when the vehicle is stopped and it is no longer necessary to perform heating. In such a case, the electric heater 16 cannot supplement the heat to the heat accumulator 13, but the heat stored in the heat accumulator 13 is gradually applied to the refrigerant to maintain the high temperature and high pressure refrigerant. You can

In any case, when starting the heating operation of the heat pump type air conditioner system, as shown in FIG. 4, the inlet 6a and the outlet 6b of the ventilation duct 6 closed by the dampers 11 and 12 are opened. If the air in the passenger compartment is circulated in the ventilation duct 6, the solenoid valves 7 and 8 are opened, and the compressor 1 is started, it takes a long time to start up the system as in a normal heat pump type air conditioner. It is possible to immediately enter a steady operation state without requiring a waiting time, and to give the heat of the condenser 2 to the air in the ventilation duct 6 to send it to the vehicle interior, and to obtain a high heating effect from the beginning.

However, the temperature in the passenger compartment is too low as in the morning in the cold region, and the temperature in the passenger compartment cannot be rapidly raised even with the capacity of the condenser 2 in the steady operation state. In this case, in response to a command from the control device 18 or a manual command, the pump 14 is simultaneously driven while continuing the normal operation of the heat pump type air conditioner system to transfer the heat fluid from the heat storage device 13 to the heat exchanger 9
The heat stored in the heat storage agent in the heat storage device 13 is added to the heat generated by the condenser 2 to heat the air sent into the vehicle interior. In this case, since the heat storage amount of the heat storage unit 13 is limited, it goes without saying that when the temperature of the air in the vehicle compartment reaches the target value, the temperature is controlled only by the heat generation of the condenser 2 thereafter. .

When it is not necessary to leave heat in the heat storage unit 13, the pump 14 is continuously driven to keep the heat storage unit 1.
Dissipate the heat from the inside of the vehicle 3 into the passenger compartment, and the compressor 1
It is also possible to reduce the power consumption of the storage battery for driving the compressor 1 by reducing the power consumption of the capacitor 2 and the heat generation from the capacitor 2. Since the storage battery is commonly used as the power source of the electric motor for running, the amount of electric power required for the heat pump type air conditioner system is reduced, and the cruising range per charge of the electric vehicle is extended accordingly. .

5 (a) and 5 (b) show an embodiment of the heat storage unit 13 which can be used in the heat pump type air conditioner system illustrated in FIG. 1 and the like. As shown in FIG.
The container 25 of the heat storage device 13 has an inlet 26 and an outlet 27 for the thermal fluid.
And the other outer surface is covered with a heat insulating material (not shown) to be thermally shielded from the outside air. In the container 25, a plurality of partition plates 28 and 28 ', which are alternately attached to the left and right wall surfaces in parallel at equal intervals, form a long bent flow path for the thermal fluid from the inlet 26 to the outlet 27. To be done. A large number of heat storage tubes 29 are fixed through the holes that are opened at the corresponding positions of the partition plates 28 and 28 '. Inside each heat storage tube 29, for example, CH ₃ COON
A heat storage agent such as a.3H ₂ O is filled, and the upper and lower ends are closed. Since the above-mentioned heat storage agent has a melting point of 58 ° C and a heat of fusion of 60 cal / g, it can absorb and discharge a large amount of heat by utilizing the latent heat due to the change of state of melting and solidification, and a circulating heat fluid. It is convenient to keep the temperature of about 60 ° C. As the heat storage agent filled in the heat storage tube 29, a sensible heat agent may be used instead of the latent heat agent although the amount of heat storage is reduced.

When the pump 14 or the pump 15 of FIG. 1 is driven, the thermal fluid such as hot water is stored in the heat accumulator 1 shown in FIG.
3 enters into the inlet 26 and flows like a broken line, receives heat from the heat storage agent in the heat storage tube 29 in the meantime, it heats up to the temperature of about 60 degreeC, flows out from the outlet 27, and supplies to the heat exchanger 9. Then, the air circulating in the ventilation duct 6 is heated. Then, the heated air cools the refrigerant in the condenser 2 at 60 ° C.
The temperature is maintained to a certain degree, and in some cases, when the dampers 11 and 12 are opened, the dampers 11 and 12 are discharged into the vehicle interior to directly raise the temperature inside the vehicle interior.

Similarly, FIG. 6A and FIG.
An example of the warmer 10 that can be used for the air conditioner system illustrated in FIG. Reference numeral 30 denotes a metal tube which serves as a refrigerant passage, 31 denotes a tube having a relatively large diameter in which the metal tube 30 is inserted, and a gap 32 between them allows a heat fluid to flow therethrough. ing. Although not shown, the space between the gaps 32 is maintained substantially constant by providing spacers at appropriate intervals in the longitudinal direction. The outer periphery of the pipe 31 is covered with a heat insulating material 33,
The heat of the heat fluid does not escape to the outside. By using such a heat insulator 10, the temperature of the refrigerant enclosed in the refrigerant passage between the solenoid valves 7 and 8 is kept at about 60 ° C. together with the heat exchanger 9, and the pressure before the compressor 1 is stopped To prevent it from dropping significantly.

FIG. 7 shows another embodiment of the warmer 10. This heat retainer 10 has a structure in which a band-shaped electric heater 34 is wound around a metal tube 30 serving as a refrigerant passage, and the periphery thereof is covered with a heat insulating material 33 without using a heat fluid heated by the heat storage device 13. . When the electric vehicle is parked for charging the storage battery, the temperature of the refrigerant enclosed in the refrigerant passage between the solenoid valves 7 and 8 can be very easily controlled by energizing the electric heater 34. Can be kept warm. Needless to say, when the compressor 1 is stopped for a relatively short period of time, electric power can be supplied from the storage battery to heat the electric heater 34.

[0033]

By implementing the present invention, although it is a heat pump type air conditioner that normally takes a long time to start up, it is possible to shift to a steady operation state at the same time as starting, eliminating the time delay of start up, The temperature inside the vehicle can be raised quickly. Further, in some cases, in addition to the heat generated by the condenser of the heat pump type air conditioner, the heat from the heat accumulator is additionally supplied to further accelerate the temperature rise in the passenger compartment. Furthermore, the work load of the compressor is reduced by the amount of heat supplied from the heat accumulator to reduce the burden on the storage battery, and the electric capacity, weight, and volume of the storage battery are reduced, and the cruising range of the electric vehicle is extended. The acceleration performance can also be improved as compared with the conventional one.

[Brief description of drawings]

FIG. 1 is a diagram showing an overall configuration of a heat pump type air conditioner system as an embodiment of the present invention.

FIG. 2 is a schematic diagram showing a basic configuration of a conventional heat pump type air conditioner.

FIG. 3 is a diagram showing a state in which the compressor is stopped in the heat pump type air conditioner system illustrated in FIG. 1.

FIG. 4 is a diagram showing a state in which a compressor is being driven in the heat pump type air conditioner system illustrated in FIG. 1.

5A and 5B show an embodiment of a heat accumulator, wherein FIG. 5A is a plan view and FIG. 5B is a vertical sectional view.

6A and 6B show one embodiment of a heat retaining device, in which FIG. 6A is a vertical sectional view and FIG. 6B is a horizontal sectional view.

FIG. 7 is a perspective view showing another embodiment of the heat retaining device by partially cutting it.

[Explanation of symbols]

 1 ... Compressor 2 ... Condenser 5 ... Fan 6 ... Ventilation duct 7, 8 ... Solenoid valve 9 ... Heat exchanger 10 ... Incubator 11, 12 ... Damper 13 ... Heat storage device 14, 15 ... Pump 16 ... Electric heater 18 ... Control device 19, 20, 21 ... Temperature detecting element 28, 28 '... Partition plate 29 ... Heat storage tube 33 ... Insulating material 34 ... Electric heater

Claims (1)

[Claims] 1. A refrigerant inlet side of the compressor so that a specific section of the refrigerant passage from the compressor to the condenser can be cut off from other parts of the refrigeration circuit when the compressor of the refrigeration circuit is stopped. And a pair of valves provided on the refrigerant outlet side of the condenser, a heat exchanger provided on the upstream side of the condenser in a ventilation duct that guides air heated by the condenser, and an inlet side and an outlet side of the ventilation duct. Is provided in
It is formed to cover the refrigerant passage between the pair of valves including the pair of dampers, which can be a small closed circuit in which air circulates in the ventilation duct by selectively closing them, and the compressor. A heat pump type air conditioner system for an electric vehicle, comprising: a heat insulator and a heat storage device capable of storing heat to be supplied to at least one of the heat exchanger and the heat insulator.