JPH07186709A - Heat pump air-conditioning/heating and dehumidifying equipment for electric vehicle - Google Patents

Abstract

PURPOSE:To improve efficiency of an air conditioner for electric vehicle, prevent reduction of a circulating quantity of refrigerant at low temperature, save the space, and reduce the noise. CONSTITUTION:This heat pump type air-conditioning/heating and dehumidifying equipment for electric vehicle is provided with a first heat exchanger 10 of air in the car interior arranged in a ventilating circuit 9 connecting a fan 6 for a heat exchanger of air in the car interior to a blowdown port 8 in the car interior, a second heat exchanger 11 of air in the interior arranged on the lower stream side of the first heat exchanger 10 arranged in the ventilating circuit 9, a refrigerant throttling device 14 arranged on a refrigerant piping between the first heat exchanger 10 and the second heat exchanger 11, and a refrigerant throttling device 4 and a four-way changeover valve 7 in the car exterior.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat pump cooling and heating dehumidifying device for an electric vehicle that air-conditions the interior of the electric vehicle.

[0002]

2. Description of the Related Art A conventional fuel engine air conditioner for a vehicle, for example, has a compressor 1 for compressing a refrigerant driven by an engine, as shown in FIG. Exchanger 2 and blower 3 for air heat exchanger outside the vehicle
After radiating heat to the air outside the passenger compartment to condense and liquefy the refrigerant, the refrigerant is guided to the passenger compartment air heat exchanger 5 via the expansion valve 4,
Here, the air in the passenger compartment air heat exchanger 5 cools and dehumidifies the air in the passenger compartment to perform cooling operation. In addition, the heating operation was performed by a hot water heater using the engine water temperature. Dehumidifying heating uses the cooling effect and engine water temperature to reheat.

In the air conditioner for an electric vehicle, the cooling action is similar to the above, but the heating action cannot use the engine water temperature, so the dotted line portion of FIG.
As shown in (b), the four-way switching valve 7 is used downstream of the compressor 1 to reverse the refrigerant flow path, and the passenger compartment air heat exchanger 5 radiates heat to the passenger compartment air to condense and liquefy the refrigerant. To the outside air heat exchanger 2 via the expansion valve 3, where it is necessary to perform heat pump heating in which the refrigerant absorbs and evaporates while cooling and dehumidifying the air outside the vehicle.

However, in the case of dehumidifying and heating which requires reheating only with the heat pump cooling and heating device using only one vehicle interior air heat exchanger, the vehicle interior air heat exchanger is made to have a low temperature as in the cooling operation, and then the electricity is not supplied. It is necessary to reheat the air with another heat source such as a heater. Therefore, a second indoor heat exchanger and a second refrigerant expansion device are added, and air is reheated in the second indoor heat exchanger that has become high temperature and high pressure by the refrigerant by switching the refrigerant expansion device to dehumidify the vehicle interior. Japanese Patent Application Laid-Open No. 5-178072 discloses an example of performing air conditioning by heating.

[0005]

When dehumidifying and heating is performed by the heat pump cooling and heating dehumidifying device that reheats with the refrigerant using the second vehicle interior heat exchanger, before the high temperature refrigerant flows into the second vehicle interior heat exchanger. When the outside air heat exchanger exchanges heat with the air, the second inside heat exchanger cannot be sufficiently warmed up, and the reheating necessary for dehumidifying and heating cannot be performed.
If a refrigerant is passed through an unnecessary heat exchanger, problems such as insufficient capacity will occur.

Further, when the outside air temperature is low, the low-temperature air and the refrigerant exchange heat with each other and the refrigerant condenses in the heat exchanger to accumulate and the circulating amount becomes insufficient.

Furthermore, when mounting cycle parts on an electric vehicle, it is necessary to reduce the mounting space and weight.
Since electric vehicles do not have noise sources such as engine noise, it is necessary for each device to have as low noise as possible.

The above has been a problem in using the heat pump dehumidifying and heating operation in the air conditioner for an electric vehicle.

The present invention solves the above-mentioned problems. Improving the efficiency of air conditioners for electric vehicles 2. Prevention of insufficient refrigerant circulation at low temperatures 3. Space saving 4. The purpose is to reduce noise.

[0010]

In order to solve the above-mentioned problems, the present invention provides a compressor, a vehicle exterior air heat exchanger, a vehicle exterior air heat exchanger blower, and a vehicle interior air heat exchanger blower. A ventilation circuit that connects the ventilation device for the vehicle interior air heat exchanger and the vehicle interior air outlet, and a first circuit disposed in the ventilation circuit.
Vehicle interior air heat exchanger, a second vehicle interior air heat exchanger arranged downstream of the first vehicle interior air heat exchanger in the ventilation circuit, a four-way switching valve, and the compression And a refrigerant pipe connecting the heat exchangers to the four-way switching valve, and the first
In a heat pump cooling and heating dehumidifying device for an electric vehicle, which is constituted by a vehicle interior air heat exchanger and a refrigerant expansion device arranged in the refrigerant pipe between the second vehicle interior air heat exchanger, A throttle device and a 4-way switching valve are arranged.

In order to solve the above-mentioned problems, the present invention provides a heat pump cooling and heating dehumidifying device for an electric vehicle according to claim 1, a refrigerant bypass circuit arranged so as to bypass the vehicle exterior air heat exchanger, and a vehicle exterior. A three-way switching valve disposed at the refrigerant inlet of the vehicle exterior heat exchanger for switching the refrigerant flow path between the vehicle exterior air heat exchanger and the refrigerant bypass circuit;
A three-way switching valve is provided outside the vehicle compartment on the refrigerant outlet side of the vehicle exterior heat exchanger to switch the refrigerant flow path between the vehicle exterior air heat exchanger and the refrigerant bypass circuit.

Further, the present invention provides an outside air heat exchanger unit in which the heat pump cooling and heating / dehumidifying device for an electric vehicle, the outside air heat exchanger and the refrigerant bypass circuit are integrated.

Further, the vehicle exterior air heat exchanger unit having the heat pump cooling and heating dehumidifying device for an electric vehicle, the vehicle exterior air heat exchanger, the refrigerant bypass circuit, and the three-way switching valve integrated with each other is provided. Is.

Further, a refrigerant bypass circuit arranged to bypass the heat pump cooling / heating / dehumidifying device for an electric vehicle and the second vehicle interior air heat exchanger according to claim 1, and the second vehicle interior air heat outside the vehicle interior. A three-way switching valve arranged on the refrigerant inlet side of the exchanger for switching the refrigerant flow path of the second vehicle interior air heat exchanger and the refrigerant bypass circuit, and the second vehicle interior air heat exchanger outside the vehicle compartment Is disposed on the refrigerant outlet side of the second
The vehicle interior air heat exchanger and the three-way switching valve for switching the refrigerant flow path of the refrigerant bypass circuit are provided.

Further, the vehicle interior air heat exchanger unit having the heat pump cooling and heating / dehumidifying device for an electric vehicle, the second vehicle interior air heat exchanger and the refrigerant bypass circuit as an integrated structure is provided. .

[0016]

With the above-described means, it is possible to dispose the refrigerant expansion device and the four-way switching valve that generate noise outside the vehicle.

Also, the outside air heat exchanger can be bypassed when necessary. In addition, the vehicle exterior air heat exchanger and the refrigerant bypass circuit can be integrated.

Furthermore, the vehicle exterior air heat exchanger, the refrigerant bypass circuit, and the three-way switching valve can be integrated.

Furthermore, the air heat exchanger in the passenger compartment can be bypassed when necessary. Further, the second vehicle interior air heat exchanger and the refrigerant bypass circuit can be integrated.

[0020]

Embodiments of the present invention will be described below with reference to the drawings.

The present invention according to claim 1 is intended to reduce noise of a heat pump cooling and heating dehumidifying device for an electric vehicle.

FIG. 1 is a block diagram of an embodiment of the heat pump cooling and heating dehumidifying device for an electric vehicle according to the first aspect.

In FIG. 1, a compressor 1, a vehicle exterior air heat exchanger 2, a vehicle exterior air heat exchanger blower 3, a vehicle interior air heat exchanger blower 6, and a vehicle interior air heat exchanger. A ventilation circuit 9 connecting the air blower 6 and the vehicle interior air outlet 8 and a first vehicle interior air heat exchanger 10 arranged in the ventilation circuit 9.
And a second vehicle interior air heat exchanger 11 arranged downstream of the first vehicle interior air heat exchanger 10 in the ventilation circuit 9.
A damper 12 arranged in the ventilation circuit 9 for adjusting the amount of air introduced into the second vehicle interior air heat exchanger 11, a four-way switching valve 7 arranged outside the vehicle compartment, and the compressor 1. The refrigerant pipe 13 connecting each of the heat exchangers 2, 10 and 11 and the four-way switching valve 7, and the first vehicle interior air heat exchanger 10 and the second vehicle interior air heat exchanger 11 described above. Refrigerant pipe 13
The refrigerant expansion device 14 arranged in the above is arranged.

In the heat pump cooling / heating / dehumidifying device for an electric vehicle configured as described above, the above-mentioned 4
One-way switching valve 7 is switched to the position shown by the solid line in FIG.
To the position indicated by the solid line in FIG. 1 to lower the temperature of the first vehicle interior air heat exchanger 10 and to raise the temperature of the vehicle exterior air heat exchanger 2 and the second vehicle interior air heat exchanger 11. Therefore, the dehumidifying and heating operation capable of reheating can be performed. The four-way switching valve 7 is switched to the position shown by the solid line in FIG. 1, and the damper 12 is switched to the position shown by the dotted line in FIG. It is possible to switch the 4-way switching valve 7 to the position shown by the dotted line in FIG.
Heating operation becomes possible by switching to the position indicated by the dotted line.

Since the four-way switching valve 7 and the refrigerant expansion device 14 which generate the refrigerant noise and the switching noise are arranged outside the vehicle compartment, it is possible to reduce the indoor noise.

In FIG. 1, the dehumidifying and heating cycle having the minimum configuration of one four-way switching valve has been described, but a plurality of refrigerant expansion devices, a plurality of refrigerant flow path switching valves, and a plurality of refrigerant flow path opening / closing valves are further provided in the vehicle. The same effect can be obtained by arranging it outdoors.

The present invention according to claim 2 is intended to improve the efficiency of a heat pump cooling and heating dehumidifying device for an electric vehicle and prevent a shortage of the circulating amount at a low temperature.

FIG. 2 is a block diagram of an embodiment of the heat pump cooling and heating dehumidifying device for an electric vehicle according to claim 2 of the exterior heat exchanger unit 15 portion shown by the dotted line in FIG.

Since the basic structure is the same as that shown in FIG. 1, the description other than the exterior heat exchanger unit 15 shown by the dotted line in FIG. 1 will be omitted.

In FIG. 2, the refrigerant bypass circuit 16 arranged to bypass the vehicle exterior heat exchanger 2 and the vehicle exterior air heat exchanger 2 arranged at the refrigerant inlet portion of the vehicle exterior air heat exchanger 2. And a first three-way switching valve 17 for switching the flow path of the refrigerant bypass circuit 16, and the outside air heat exchanger 2 and the refrigerant bypass circuit 16 arranged at the refrigerant outlet portion of the outside air heat exchanger 2 And a second three-way switching valve 18 that switches the flow path.

The two three-way switching valves 17 and 18 are connected to the second
Since switching to the direction of the dotted line in the figure is the same as in claim 1, description of cooling, heating, and dehumidifying heating will be omitted.

According to the first aspect of the present invention, when the vehicle wind speed is present during dehumidification heating, the outside air heat exchanger 2 having a high temperature is exchanged with the outside air so that the second inside air heat exchange shown in FIG. It is not possible to heat the vessel 11 to a high temperature, so
By switching the one-way switching valves 17 and 18 to the solid line portions in FIG. 2, the refrigerant bypass circuit 16 can be used and the second vehicle interior air heat exchange without heat being taken by the vehicle exterior air heat exchanger 2. Since it becomes possible to send a high-temperature and high-pressure refrigerant to the container 11, the efficiency is improved during dehumidifying and heating.

Further, in the structure of claim 1, during dehumidifying and heating at low temperature, the refrigerant exchanges heat with the outside air due to vehicle speed air to be completely condensed, and the refrigerant circulation amount decreases, so that the compressor 1 does not easily reach a high temperature. Therefore, the two 3-way switching valves 17,
By switching 18 to the part indicated by the solid line in FIG. 2 and bypassing the vehicle exterior air heat exchanger 2, the above-mentioned problems are eliminated and the quick warming property is improved.

Although two three-way switching valves are arranged in FIG. 2, the effect of improving the efficiency during dehumidifying and heating and preventing the reduction of the refrigerant circulation amount can be obtained by using only one of them.

It is an object of the present invention to improve the efficiency of a heat pump cooling / heating / dehumidifying device for an electric vehicle, prevent a shortage of the circulating amount at low temperatures, and save space.

FIG. 3 is a block diagram of an embodiment of the heat pump cooling and heating dehumidifying device for an electric vehicle according to claim 3 of the exterior heat exchanger unit 15 portion shown by the dotted line in FIG.

FIG. 4 is a substantive diagram of an embodiment of the heat pump cooling and heating dehumidifying device for an electric vehicle of claim 3 of the exterior heat exchanger unit 15 portion shown by the dotted line in FIG.

Since the basic structure is the same as that of FIG. 1, the description of the components other than the exterior heat exchanger unit 15 shown by the dotted line in FIG. 1 will be omitted.

In FIGS. 3 and 4, the refrigerant bypass circuit 19 which is arranged so as to bypass the vehicle exterior heat exchanger 2 and is integrated with the vehicle exterior heat exchanger 2, and the vehicle exterior air heat exchanger 2 are provided. A first three-way switching valve 17 arranged at the refrigerant inlet portion for switching the flow path between the vehicle exterior air heat exchanger 2 and the refrigerant bypass circuit 19, and a refrigerant outlet portion of the vehicle exterior air heat exchanger 2. The vehicle outside air heat exchanger 2 and the second three-way switching valve 18 for switching the flow path of the refrigerant bypass circuit 16 are configured.

The two three-way switching valves 17 and 18 are shown in FIG.
Since the same as in claim 1 by switching to the direction of the dotted line in FIG. 4, description of cooling, heating, and dehumidifying heating will be omitted.

According to the first aspect of the present invention, when the vehicle wind speed is present during dehumidifying and heating, the outside air heat exchanger 2 having a high temperature is exchanged with the outside air, and the second inside air heat exchange shown in FIG. It is not possible to heat the vessel 11 to a high temperature, so
The refrigerant bypass circuit 19 can be used by switching the one-way switching valves 17 and 18 to the solid line portions in FIGS. 3 and 4, and the second vehicle compartment can be used without heat being taken by the vehicle exterior air heat exchanger 2. Since it becomes possible to send a high-temperature and high-pressure refrigerant to the air heat exchanger 11, the efficiency at the time of dehumidifying and heating is improved.

Further, in the structure of claim 1, during dehumidifying and heating at low temperature, the refrigerant exchanges heat with the outside air due to vehicle speed air and completely condenses, the refrigerant circulation amount decreases, and the compressor 1 does not easily reach a high temperature. Therefore, the two 3-way switching valves 17,
By switching 18 to the solid line portion in FIGS. 3 and 4, and bypassing the outside air heat exchanger 2 of the vehicle, the above-mentioned problems are eliminated and the quick heating property is improved.

Further, since the refrigerant bypass circuit 19 is integrated with the vehicle exterior air heat exchanger 2, space is saved.

Although two three-way switching valves are arranged in FIGS. 3 and 4, the effect of improving the efficiency during dehumidifying heating and preventing the reduction of the refrigerant circulation amount can be obtained by using only one of them.

It is an object of the present invention to improve the efficiency of a heat pump cooling / heating / dehumidifying device for an electric vehicle, prevent the circulation amount from becoming insufficient at low temperatures, and save space.

FIG. 5 is a block diagram of an embodiment of the heat pump cooling and heating dehumidifying device for an electric vehicle according to claim 4 of the exterior heat exchanger unit 15 portion shown by the dotted line in FIG.

FIG. 6 is a substantive view of an embodiment of the heat pump cooling and heating dehumidifying device for an electric vehicle of claim 4 of the exterior heat exchanger unit 15 portion shown by the dotted line in FIG.

Since the basic structure is the same as that shown in FIG. 1, the description other than the exterior heat exchanger unit 15 shown by the dotted line in FIG. 1 will be omitted.

In FIG. 5 and FIG. 6, the refrigerant bypass circuit 20 arranged so as to bypass the vehicle exterior heat exchanger 2 and integrated with the vehicle exterior heat exchanger 2 and the vehicle exterior air heat exchanger 2 are shown. A first three-way switching valve 21 for switching the flow path between the vehicle exterior air heat exchanger 2 and the vehicle exterior heat exchanger 2 which is arranged at the refrigerant inlet portion and is integrated with the vehicle exterior heat exchanger 2; A second three-way for switching the flow paths of the vehicle exterior air heat exchanger 2 and the refrigerant bypass circuit 20 which are arranged at the refrigerant outlet portion of the outdoor air heat exchanger 2 and are integrated with the vehicle exterior heat exchanger 2. It is composed of a switching valve 22.

The two three-way switching valves 21 and 22 are shown in FIG.
6 is the same as in claim 1 by switching to the direction of the dotted line in FIG. 6, and therefore description of cooling, heating, and dehumidifying heating will be omitted.

According to the first aspect of the present invention, when the vehicle wind speed is present during dehumidifying heating, the outside air heat exchanger 2 which has a high temperature is exchanged with the outside air, and the second inside air heat exchange shown in FIG. It is not possible to heat the vessel 11 to a high temperature, so
By switching the one-way switching valves 21 and 22 to the solid line portions in FIGS. 5 and 6, the refrigerant bypass circuit 20 can be used, and heat is not taken by the vehicle exterior air heat exchanger 2 and the second vehicle compartment is used. Since it becomes possible to send a high-temperature and high-pressure refrigerant to the air heat exchanger 11, the efficiency at the time of dehumidifying and heating is improved.

Further, in the constitution of claim 1, during dehumidifying and heating at low temperature, the refrigerant exchanges heat with the outside air due to the vehicle speed air and is completely condensed, the refrigerant circulation amount decreases, and the compressor 1 does not easily reach a high temperature. Therefore, the two 3-way switching valves 21,
By switching 22 to the solid line portion in FIGS. 5 and 6 and bypassing the vehicle exterior air heat exchanger 2, the above problem is eliminated and the quick warming property is improved.

Further, the refrigerant bypass circuit 20 and the two three-way switching valves 21 and 22 are connected to the outside air heat exchanger 2 of the vehicle compartment.
Space saving because it is integrated with.

In FIG. 5 and FIG. 6, two three-way switching valves are arranged for explanation, but even if only one of them is used, the efficiency improvement during dehumidification heating, the prevention of the refrigerant circulation amount reduction, and the space saving can be achieved. can get.

The present invention according to claim 5 is intended to improve the efficiency of a heat pump cooling and heating dehumidifying device for an electric vehicle.

FIG. 7 is a block diagram of an embodiment of the heat pump cooling and heating dehumidifying device for an electric vehicle according to the present invention.

In FIG. 7, a compressor 1, a vehicle exterior air heat exchanger 2, a vehicle exterior air heat exchanger blower 3, a vehicle interior air heat exchanger air blower 6, and a vehicle interior air heat exchanger are shown. A ventilation circuit 9 connecting the air blower 6 and the vehicle interior air outlet 8 and a first vehicle interior air heat exchanger 10 arranged in the ventilation circuit 9.
And a second vehicle interior air heat exchanger 11 arranged downstream of the first vehicle interior air heat exchanger 10 in the ventilation circuit 9.
A damper 12 arranged in the ventilation circuit 9 for adjusting the amount of air introduced into the second vehicle interior air heat exchanger 11, a four-way switching valve 7 arranged outside the vehicle compartment, and the compressor 1. The refrigerant pipe 13 connecting each of the heat exchangers 2, 10 and 11 and the four-way switching valve 7, and the first vehicle interior air heat exchanger 10 and the second vehicle interior air heat exchanger 11 described above. Refrigerant pipe 13
, A refrigerant refrigerant bypass circuit 23 arranged to bypass the second vehicle interior air heat exchanger 11, and the second vehicle interior air heat exchanger 11 outside the vehicle compartment. Three-way switching valve 24 for switching the refrigerant flow path of the second vehicle interior air heat exchanger 11 and the refrigerant bypass circuit 23 arranged on the refrigerant inlet side of the second vehicle interior air heat outside the vehicle compartment. The second vehicle interior air heat exchanger 11 arranged on the refrigerant outlet side of the exchanger 11 and the refrigerant bypass circuit 2
And a three-way switching valve 25 for switching the three refrigerant flow paths.

In the heat pump cooling / heating / dehumidifying device for an electric vehicle configured as described above, the above-mentioned 4
One-way switching valve 7 is switched to the position shown by the solid line in FIG.
To the position indicated by the solid line in FIG. 1 to lower the temperature of the first vehicle interior air heat exchanger 10 and to raise the temperature of the vehicle exterior air heat exchanger 2 and the second vehicle interior air heat exchanger 11. Therefore, the dehumidifying and heating operation capable of reheating can be performed. The four-way switching valve 7 is switched to the position shown by the solid line in FIG. 7, and the damper 12 is switched to the position shown by the dotted line in FIG. Cooling operation is possible because air does not flow in the vehicle interior air heat exchanger 11. By switching the 4-way switching valve 7 to the position shown by the dotted line in FIG. 7 and switching the damper 12 to the position shown by the dotted line in FIG. Heating operation becomes possible.

However, according to the above method, the temperature of the second vehicle interior air heat exchanger 11 is high and the cooling capacity is deteriorated. Therefore, by switching the two 3-way switching valves 24 and 25 to the positions indicated by the solid lines in FIG. 7, high-temperature refrigerant does not flow into the second vehicle interior air heat exchanger 11, and the cooling efficiency is improved.

By arranging the two three-way switching valves 24 and 25 outside the vehicle compartment, the effect of reducing the noise inside the vehicle compartment can be obtained.

Although two three-way switching valves are arranged in FIG. 7, the same effect can be obtained by using only one of them.

The present invention according to claim 6 is intended to improve efficiency and save space of a heat pump cooling and heating dehumidifying device for an electric vehicle.

FIG. 8 is a block diagram of an embodiment of the heat pump cooling and heating dehumidifying device for an electric vehicle according to claim 6.

FIG. 9 shows the interior heat exchanger unit 2 of FIG.
It is a real figure of one example of a heat pump cooling and heating dehumidification device for electric vehicles of an electric car of Claim 6 of seven parts.

In FIG. 8 and FIG. 9, a compressor 1, a vehicle exterior air heat exchanger 2, a vehicle exterior air heat exchanger blower 3,
An air blower 6 for the vehicle interior air heat exchanger, and a ventilation circuit 9 connecting the air blower 6 for the vehicle interior air heat exchanger and the vehicle interior outlet 8.
A first vehicle interior air heat exchanger 10 arranged in the ventilation circuit 9 and a second vehicle interior air heat exchanger 10 arranged in the ventilation circuit 9 downstream of the first vehicle interior air heat exchanger 10. A vehicle interior air heat exchanger 11 and a damper 12 arranged in the ventilation circuit 9 for adjusting the amount of air introduced into the second vehicle interior air heat exchanger 11.
And a four-way switching valve 7 arranged outside the vehicle compartment and the compressor 1
And the heat exchangers 2, 10 and 11 and the four-way switching valve 7
A refrigerant pipe 13, which connects the first vehicle interior air heat exchanger 10 and the second vehicle interior air heat exchanger 11, the refrigerant expansion device 14 arranged in the refrigerant pipe 13, and a second vehicle. The second air is arranged so as to bypass the indoor air heat exchanger 11.
Refrigerant bypass circuit 26, which is integrated with the vehicle interior air heat exchanger 11, and the second vehicle interior air heat exchanger arranged outside the vehicle compartment on the refrigerant inlet side of the second vehicle interior air heat exchanger 11. 11 and the three-way switching valve 24 for switching the refrigerant flow paths of the refrigerant bypass circuit 26, and the second vehicle interior air heat arranged on the refrigerant outlet side of the second vehicle interior air heat exchanger 11 outside the vehicle interior. It comprises an exchanger 11 and a three-way switching valve 25 for switching the refrigerant flow path of the refrigerant bypass circuit 26.

In the heat pump cooling / heating / dehumidifying device for an electric vehicle configured as described above, the description of each mode is omitted because it is the same as in claim 5.

In the cooling operation mode, by switching the two 3-way switching valves 24 and 25 to the positions shown by the solid lines in FIG. 8, high-temperature refrigerant does not flow into the second vehicle interior air heat exchanger 11 and cooling efficiency is improved.

Further, by arranging the two three-way switching valves 24 and 25 outside the vehicle compartment, the effect of reducing the noise inside the vehicle compartment can be obtained.

Further, since the refrigerant bypass circuit 26 is arranged in the vehicle interior unit 27, space is saved.

Although two three-way switching valves are arranged in FIG. 8, the same effect can be obtained by using only one of them.

[0071]

As is apparent from the above means, according to the present invention, the noise can be reduced by disposing the refrigerant expansion device and the four-way switching valve that generate sound outside the vehicle.

Further, since the outside air heat exchanger can be bypassed when necessary, it is possible to improve the efficiency of the dehumidifying and heating operation, etc., and prevent the circulation amount from becoming insufficient at low temperatures.

Further, it is possible to save space because the efficiency of dehumidifying and heating operation can be improved, the circulation amount can be prevented from being insufficient at low temperature, and the outside air heat exchanger and the refrigerant bypass circuit can be integrated.

Further, it is possible to further improve the efficiency of dehumidifying and heating operation, to prevent the shortage of the circulation amount at low temperature, and to integrate the outside air heat exchanger, the refrigerant bypass circuit, and the three-way switching valve into an integrated structure to further save space. Can be realized.

Furthermore, since the air heat exchanger in the passenger compartment can be bypassed when necessary, the efficiency in the cooling operation can be improved.

Further, the efficiency can be improved during the cooling operation and the second vehicle interior air heat exchanger and the refrigerant bypass circuit can be integrated into one structure, so that the space can be saved.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a heat pump cooling and heating dehumidifier for an electric vehicle according to an embodiment of the present invention.

FIG. 2 is a schematic diagram of a main part of the heat pump cooling and heating dehumidifying device for the electric vehicle.

FIG. 3 is a configuration diagram of a main part of the heat pump cooling and heating dehumidifying device for the electric vehicle.

FIG. 4 is a schematic view of a main part of the heat pump cooling and heating dehumidifier for the electric vehicle.

FIG. 5 is a configuration diagram of main parts of the heat pump cooling and heating dehumidifying device for the electric vehicle.

FIG. 6 is a substantial view of a main part of the heat pump cooling and heating dehumidifying device for the electric vehicle.

FIG. 7 is a configuration diagram of a heat pump cooling and heating dehumidifying device for an electric vehicle according to another embodiment of the present invention.

FIG. 8 is a configuration diagram of a heat pump cooling and heating dehumidifying device for an electric vehicle according to another embodiment of the present invention.

FIG. 9 is a schematic view of essential parts of the heat pump cooling and heating dehumidifying device for the electric vehicle.

FIG. 10A is a configuration diagram of a conventional air conditioner for cooling an engine driven by a fuel engine, and FIG. 10B is a configuration diagram of an air conditioner for an electrically driven vehicle in a conventional example.

[Explanation of symbols]

 1 Compressor 2 Outside air heat exchanger for vehicle 3 Air blower for outside air heat exchanger for vehicle 4 Refrigerant expansion device 5 Air heat exchanger for vehicle interior 6 Air blower for air heat exchanger for vehicle interior 7 4-way switching valve 8 Air outlet for vehicle interior 9 Ventilation circuit 10 First vehicle interior air heat exchanger 11 Second vehicle interior air heat exchanger 12 Damper 13 Refrigerant pipe 14 Refrigerant expansion device 15 Vehicle exterior heat exchanger unit 16 Refrigerant bypass circuit 17 First three-way switching valve 18 2nd 3 way switching valve 19 Refrigerant bypass circuit 20 Refrigerant bypass circuit 21 1st 3 way switching valve 22 2nd 3 way switching valve 23 Refrigerant bypass circuit 24 1st 3 way switching valve 25 2nd 3 way Switching valve 26 Refrigerant bypass circuit

Claims (6)

[Claims] 1. A compressor, an outside air heat exchanger, an outside air heat exchanger blower, an inside air heat exchanger blower, the inside air heat exchanger blower and an inside air blower. A ventilation circuit connecting the outlets and a first circuit arranged in the ventilation circuit
Vehicle interior air heat exchanger, a second vehicle interior air heat exchanger arranged downstream of the first vehicle interior air heat exchanger in the ventilation circuit, and four sides arranged outside the vehicle compartment A switching valve, a refrigerant pipe connecting the compressor, the heat exchangers, and the four-way switching valve, a first passenger compartment air heat exchanger and a second passenger compartment air heat disposed outside the passenger compartment. A heat pump cooling and heating dehumidifying device for an electric vehicle, which comprises a refrigerant expansion device arranged in the refrigerant pipe between exchangers. 2. A refrigerant bypass circuit arranged so as to bypass the vehicle outside air heat exchanger, and the vehicle outside air heat exchanger and the refrigerant arranged at the refrigerant inlet side of the vehicle outside heat exchanger outside the vehicle cabin. A three-way switching valve for switching the refrigerant flow path of the bypass circuit, and a refrigerant flow path switching of the vehicle outside air heat exchanger and the refrigerant bypass circuit arranged on the refrigerant outlet side of the vehicle exterior heat exchanger outside the vehicle compartment. The heat pump cooling and heating dehumidifying device for an electric vehicle according to claim 1, which is constituted by a three-way switching valve. 3. The heat pump cooling and heating dehumidifying device for an electric vehicle according to claim 2, wherein the outside air heat exchanger and the refrigerant bypass circuit are integrally structured. 4. The heat pump cooling and heating dehumidifying device for an electric vehicle according to claim 2, wherein the exterior air heat exchanger, the refrigerant bypass circuit, and the three-way switching valve are integrated. 5. A refrigerant bypass circuit arranged to bypass a second vehicle interior air heat exchanger, and the second vehicle outside the vehicle compartment.
A three-way switching valve disposed on the refrigerant inlet side of the vehicle interior air heat exchanger for switching the refrigerant flow path of the second vehicle interior air heat exchanger and the refrigerant bypass circuit; and the second vehicle outside the vehicle compartment. 2. The electricity according to claim 1, which is arranged on the refrigerant outlet side of the indoor air heat exchanger and comprises the second vehicle interior air heat exchanger and a three-way switching valve for switching the refrigerant flow path of the refrigerant bypass circuit. Heat pump cooling and heating dehumidifier for automobiles. 6. The heat pump cooling and heating dehumidifying device for an electric vehicle according to claim 5, wherein the second vehicle interior air heat exchanger and the refrigerant bypass circuit are integrally structured.