JPH08295117A - Air conditioning device for automobile - Google Patents

Abstract

PURPOSE: To enable the stable dehumidifying and heating operation even if the outside air temperature is low by providing a bypass means which can make a refrigerant detour a first condenser and circulative and a refrigerant line which can make the refrigerant circulative to a second evaporator connected to a second condenser in series. CONSTITUTION: A refrigerant compressed by a compressor 8 is bypassed to be introduced into a kid tank 6 without passing through a first condenser 5. After flowing through a three-way connector 10 and an electromagnetic valve 11, the refrigerant of a high-pressure gas is condensed at a second condenser 62 to radiate heat so that the heat exchange is performed to raise the temperature of the passing air. The refrigerant is then throttled with an expansion valve 47 and is made to perform the heat exchange by evaporating and absorbing heat at a second evaporator 60 to cool the air through heat exchange and is again introduced into the compressor 8 via a three-way connector 9 to be circulated. The hot water supplied from an engine 4 is supplied to a heater core 44 and is performed the heat exchange to raise the temperature of the passing air, and is again introduced into the engine 4 to be circulated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dual type automotive air conditioner provided with an independent air conditioning system.

[0002]

2. Description of the Related Art Recently, a so-called one-box car such as some luxury cars and wagon cars has come to be equipped with a dual type air conditioner for an automobile having an independent air conditioner system.

This type of automobile air conditioner, for example, as shown in FIG. 7, has a front seat air-conditioning unit F for air-conditioning the selectively taken inside and outside air and blowing out the front seat to the target. It is composed of a first air conditioning system A and a second air conditioning system B having a rear seat air conditioner unit R for air conditioning the taken inside air and blowing it out to the rear seats.

The first air conditioning system A further has a heater core 44 provided in the air passages of the engine 4 and the front seat air conditioning unit F which are shared with the second air conditioning system B.
A refrigerant line that connects a hot water line A1 that connects to the air conditioner, a compressor 8 and a first condenser 5 that are shared with the second air conditioning system B, and a first evaporator 42 that is provided in the air passage of the front seat air conditioner unit F. A2 and.

On the other hand, the second air conditioning system B also has
A hot water line B1 connecting the engine 4 shared with the first air conditioning system A and the heater core 66 provided in the air passage of the rear seat air conditioning unit R, and the compressor 8 shared with the first air conditioning system A. And a refrigerant line B2 that connects the first condenser 5 and the second evaporator 60 provided in the air passage of the rear seat air conditioner unit R.

Then, for example, the air conditioner control amplifier 1 is controlled based on an input from the front-seat control panel 2 provided on the instrument panel or an input from the remote-control-type rear-seat controller 3
The solenoid valve 11 controls the supply of the refrigerant to the evaporators 42 and 60, and the water valves 50 and 66.
By this, the supply of hot water (cooling water for the engine 4) to the heater cores 44 and 62 is controlled, and the front seat and the rear seat are independently air-conditioned.

[0007]

However, such a conventional dual type air conditioner for an automobile has a three-way connector 17, 1 in the middle of the piping of the hot water line A1, for example.
Although the first condenser 5, the compressor 8 and the like are shared by providing 8, the two hot water lines and the refrigerant lines are required, and the piping configuration becomes complicated and the number of parts and incidental work increase. Therefore, the parts cost and the assembling cost are increased, and there is a problem in productivity.

Further, when the compressor functions as a heating device when the outside air temperature in winter is low, for example, at 0 ° C. or lower, the condensation capacity of the condenser becomes excessive, and liquid backing or the like occurs in the refrigerant line to stabilize the air conditioner. It is difficult to establish a cycle. Therefore, when driving, it is not possible to stably remove moisture generated by passengers from the air, which may cause fog inside the window glass due to the temperature difference between the inside and outside of the vehicle. May be a problem.

Further, since the heat source for raising the temperature used for air conditioning is the cooling water of the engine, there is a possibility that the heating performance becomes insufficient when the outside air temperature in winter is low. Particularly in the case of the combustion (lean burn) engine type, there is a possibility that it may be a problem because the amount of heat of the cooling water of the available engine is small.

The present invention has been made in view of the above-mentioned problems of the prior art, and is a dual type having excellent productivity which enables stable dehumidifying and heating operation even when the outside air temperature is low. It is an object of the present invention to provide an automobile air conditioner.

[0011]

In order to achieve the above object, the present invention provides a first air conditioning system having a first air conditioner unit for air conditioning the selectively taken in and outside air to the first compartment. And a second air conditioning system having a second air conditioning system that air-conditions the taken inside air and supplies the second compartment to the second compartment, in a vehicle air conditioner, the refrigerant is free to bypass the first condenser. By-pass means that can be circulated through the first
A first evaporator and a heater core having expansion means for adiabatically expanding the refrigerant are sequentially arranged in the air passage of the air conditioner unit from the upstream side, and an expansion means for adiabatically expanding the refrigerant in the air passage of the second air conditioner unit. A second evaporator and a second condenser are sequentially arranged from the upstream side, and the first air conditioning system includes a refrigerant line that allows the refrigerant to freely circulate in the first evaporator, and an engine cooling water in the heater core. And a hot water line that allows the refrigerant to freely circulate, and the second air conditioning system has a refrigerant line that allows the refrigerant to freely circulate to the evaporator to which the second condenser is connected in series. It is an air conditioner for automobiles.

The bypass means includes a bypass branch portion provided in the middle of piping between the refrigerant outlet of the compressor and the refrigerant inlet of the first condenser, the refrigerant outlet of the first condenser and the refrigerant inlet of the first evaporator. A bypass line connecting a bypass merging part provided in the middle of the pipe, valve means capable of adjusting the amount of refrigerant to be bypassed, and a first part provided in the middle of the pipe between the bypass branch part and the first condenser. And a valve means capable of adjusting the amount of refrigerant introduced into one condenser, wherein the refrigerant line of the first air conditioning system has the refrigerant outlet of the compressor to which the first evaporator is connected in series. Formed by connecting to the refrigerant inlet of the first condenser and connecting the refrigerant outlet of the first evaporator to the refrigerant inlet of the compressor Valve means for adjusting the amount of refrigerant circulating in the middle of the pipe between the bypass confluence part and the expansion means is provided, and the hot water line of the first air conditioning system is a hot water outlet of a cooling water jacket of an engine. Is connected to the hot water inlet of the heater core, the hot water outlet of the heater core is connected to the hot water inlet of the cooling water jacket, and valve means for adjusting the circulating hot water amount is provided. In the refrigerant line of the harmony system, a branch portion is provided in the middle of piping between the refrigerant outlet of the first evaporator and the refrigerant inlet of the compressor and in the middle of piping between the bypass merging portion and the valve means, and the branch portion is provided. The second evaporator is connected in series to the refrigerant inlet of the second condenser to cool the second evaporator. Is formed by connecting the outlet to the branch portion, further, the valve means may adjust the amount of refrigerant circulating, characterized in that provided in the middle pipe of the second capacitor and the branch portion.

In the automobile air conditioner of the present invention, the third condenser is arranged in the air passage between the first evaporator and the heater core, and
It is characterized in that it is connected in series to a refrigerant line on the refrigerant inlet side of the first evaporator.

Further, according to the present invention, a first air conditioning system having a first air conditioner unit for air-conditioning the selectively taken in / outside air and supplying it to the first section, and air-conditioning the taken-in air. In a vehicle air conditioner including a second air conditioner system having a second air conditioner unit for supplying to a second compartment, a bypass means is provided which allows the refrigerant to circulate freely around the first condenser. In the air passage of the first air conditioner unit, a first evaporator having expansion means for adiabatically expanding the refrigerant and a third condenser are sequentially arranged from the upstream side, and the refrigerant is introduced in the air passage of the second air conditioner unit. A second evaporator having an expansion means for performing adiabatic expansion and a second condenser are sequentially arranged from the upstream side, and the first air conditioning system includes the third condenser. Said capacitor is connected in series with the second
The evaporator has a refrigerant line capable of freely circulating the refrigerant, and the second air conditioning system has a refrigerant line capable of freely circulating the refrigerant to the second evaporator to which the second condenser is connected in series. Is an air conditioner for an automobile.

The bypass means includes a bypass branch portion provided in the middle of piping between the refrigerant outlet of the compressor and the refrigerant inlet of the first condenser, the refrigerant outlet of the first condenser and the refrigerant inlet of the first evaporator. A bypass line connecting a bypass merging part provided in the middle of the pipe, valve means capable of adjusting the amount of refrigerant to be bypassed, and a first part provided in the middle of the pipe between the bypass branch part and the first condenser. And a valve means capable of adjusting the amount of refrigerant introduced into one condenser, wherein the refrigerant line of the first air conditioning system has the refrigerant outlet of the compressor connected with the third condenser in series. The first evaporator connected to the refrigerant inlet of a condenser and the refrigerant outlet of the third condenser connected in series with the compressor. Valve means for adjusting the amount of the refrigerant that is formed by being connected to the refrigerant inlet of the second air-conditioning system and that circulates in the middle of the pipe between the bypass merging portion and the expansion means, and the refrigerant line of the second air conditioning system. Is provided with a branch portion in the middle of piping between the refrigerant outlet of the first evaporator and the refrigerant inlet of the compressor and in the middle of piping between the bypass merging portion and the valve means, and the branch portion is connected in series with the second evaporator. A valve means connected to the refrigerant inlet of the second condenser connected to the second condenser and connected to the refrigerant outlet of the second evaporator to the branch portion, and further capable of adjusting the circulating refrigerant amount; And the second capacitor is provided in the middle of the pipe.

[0016]

The present invention thus constructed operates as follows for each structure.

In the structure described in claims 1 and 2, the bypass means for allowing the refrigerant to circulate around the first condenser and freely circulate, and the second means in which the second condenser is connected in series. Since the evaporator is provided with a refrigerant line or the like that allows the refrigerant to circulate freely, the refrigerant can be used as a heat source for raising the temperature of the air conditioning of the second air conditioning system, and only one hot water line is required.

According to the third aspect of the invention, the third condenser is arranged in the air passage between the first evaporator of the first air conditioner unit and the heater core, and the refrigerant inlet of the first evaporator is arranged. Since it is connected in series to the refrigerant line on the side, the refrigerant can also be used as a heat source for raising the temperature of the air conditioning of the first air conditioning system, and while reducing the load on the hot water line, the main equipment that needs to be added is: There is only one capacitor.

According to the fourth and fifth aspects of the invention, there is provided a bypass means for bypassing the first condenser to circulate the refrigerant freely and a first condenser in which a third condenser is connected in series. A refrigerant line that allows the refrigerant to freely circulate in the evaporator, a refrigerant line that allows the refrigerant to freely circulate in the second evaporator that has a second condenser connected in series, and a second evaporator that has the second condenser connected in series. Since the refrigerant line or the like that allows the refrigerant to circulate freely is provided, the refrigerant can be used as a heat source for raising the temperature of the air conditioning of the first air conditioning system and the second air conditioning system, and thus no hot water line is required.

[0020]

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

FIG. 1 is a schematic configuration diagram for explaining a configuration and a dehumidifying heating operation of a vehicle air conditioner according to a first embodiment of the present invention, and FIG. 2 is a cooling operation in the first embodiment of FIG. 3 is a schematic configuration diagram for explaining the configuration of a vehicle air conditioner according to a second embodiment of the present invention, and FIG. 3 is a schematic configuration diagram for describing dehumidifying and heating operation.
FIG. 5 is a schematic configuration diagram for explaining a cooling operation in a second embodiment of FIG. 5, and FIG. 5 is a schematic configuration diagram for explaining a configuration and a dehumidifying heating operation of a vehicle air conditioner according to a third embodiment of the present invention. FIG. 6 is a schematic configuration diagram for explaining the cooling operation in the third embodiment of FIG.

The same members as those in FIG. 7 are designated by the same reference numerals. Further, the arrows indicate the circulation directions of the refrigerant and the hot water, the solid line indicates the hot water line, and the broken line indicates the refrigerant line.

As shown in FIG. 1, the first embodiment of the dual-type automobile air conditioner according to the present invention is for air-conditioning the selectively taken in / out air to blow out the front seat to the target. It is composed of a first air conditioning system C having a front seat air conditioning unit F and a second air conditioning system D having a rear seat air conditioning unit R for air conditioning the taken inside air and blowing the air to the rear seats. .

The first air conditioning system C further includes a hot water line C1 composed of an engine 4, a heater core 44, and a water valve 50 opened and closed by an actuator 43, three-way connectors 9 and 10, a compressor 8, and a solenoid valve 13. , 14, 15, a first condenser 5, a check valve 16, a liquid tank 6, an expansion valve 47, and a first evaporator 42, and a refrigerant line C2.

Further, in the front seat air conditioner unit F, an air mix whose opening is adjusted by an intake door 46 driven by an actuator 41, the first evaporator 42, and an actuator 43 in order from the upstream side in the air passage. A door 49 and the heater core 44 are arranged.

The second air conditioning system D is further connected to the refrigerant line C2 of the first air conditioning system C via the three-way connectors 9 and 10, the solenoid valve 11, the second condenser 62, the expansion valve 64, and It has a refrigerant line D2 composed of the second evaporator 60.

In the rear seat air conditioner unit R, the second evaporator 6 is arranged in order from the upstream side in the air passage.
0, an air mix door 65 whose opening is adjusted by an actuator 61, and the second condenser 62.

Next, the flow of refrigerant and hot water (engine cooling water) during dehumidifying and heating operation will be described.

With respect to the refrigerant, the solenoid valves 13 and 15 are set to be closed and the solenoid valves 11 and 14 are set to be opened so that only the refrigerant line D2 is operated.

That is, the refrigerant compressed by the compressor 8 is bypassed without passing through the first condenser 5 and introduced into the liquid tank 6. And the three-way connector 10
The refrigerant, which is a high-pressure gas, passes through the solenoid valve 11 and condenses in the second condenser 62 to radiate heat, thereby exchanging heat and raising the temperature of the passing air. Further, the refrigerant is throttled by the expansion valve 47 and evaporated and absorbed by the second evaporator 60 to exchange heat to cool the passing air, and is introduced again into the compressor 8 via the three-way connector 9 and circulated. are doing. Reference numeral 17 represents a pressure switch, for example, which stops the operation of the compressor 8 to protect it when it is detected that the refrigerant pressure is 25 kg / cm 2 or more.

On the other hand, for hot water, the hot water line C1 is functioning.

That is, the hot water (engine cooling water) supplied from the engine 4 is supplied to the heater core 44, heat-exchanges to raise the temperature of the passing air, and is then reintroduced into the engine 4 and circulated. ing.

As a result, in the front seat air conditioner unit F,
Since the first evaporator 42 does not function, the air selectively taken in from the inside and outside air is heated by the heater core 44 without being cooled and dehumidified, and is mixed with the cold air that has not passed through the heater core 44 to reach the target temperature. The air temperature is adjusted to the air temperature, and for example, a door (not shown) is selectively driven by the actuator 45, and the air is blown into the vehicle compartment from the front seat differential outlet, the vent outlet, and the foot outlet.

On the other hand, in the rear seat air conditioner unit R, the inside air taken in by a fan (not shown) is
When passing through the evaporator 60, it is cooled and dehumidified by exchanging heat with the refrigerant, and when passing through the second condenser 62, it is heated by exchanging heat with the refrigerant and passes through the second condenser 62. It is mixed with uncooled cold air and air-conditioned to the target warm air temperature. For example, a door (not shown) is selectively driven by the actuator 63 and blown into the vehicle compartment from the vent outlet and the foot outlet.

Then, for example, based on the input from the front-seat control panel 2 provided on the instrument panel or the input from the remote-control-type rear-seat controller 3, the outside air temperature sensor 12, the vehicle room temperature sensor 51, And the air conditioner control amplifier 1 is controlled according to the detected value of the temperature sensor 68 of the inside air which has passed through the second evaporator 60, and the evaporators 42, 60 are controlled by the solenoid valve 11.
To control the supply of the refrigerant to the heater cores, and to control the supply of hot water (cooling water for the engine 4) to the heater cores 44 and 62 by the water valves 50 and 66, thereby performing air conditioning for the front seat and the rear seats independently. You can

Next, the flow of the refrigerant and hot water (engine cooling water) during the cooling operation will be described with reference to FIG.

With respect to the refrigerant, the solenoid valve 14 is set to be closed and the solenoid valves 11, 13 and 15 are set to be open so that the refrigerant lines C2 and D2 are made to function.

That is, the refrigerant compressed by the compressor 8 passes through the solenoid valve 13 without being bypassed and is introduced into the first condenser 5, and the refrigerant which is a high pressure gas is condensed and radiates heat to exchange heat with the outside air. To do. Further, the refrigerant passes through the check valve 16 and is introduced into the liquid tank 6, where the mixed gas is separated into gas and liquid in order to ensure a stable supply of the liquid refrigerant. Is partially introduced into the refrigerant line D2 described later, and the rest of the refrigerant passes through the solenoid valve 15. Further, the refrigerant is the expansion valve 4
The air is cooled by passing through the three-way connector 9 and cooled by the first evaporator 42 to evaporate and absorb heat in the first evaporator 42 to cool the passing air and merge with the refrigerant from the refrigerant line D2 described later. It is reintroduced into the compressor 8 and circulated. Reference numeral 5 represents a fan, which has a function of promoting heat exchange between the outside air and the refrigerant in the first condenser 5.

The refrigerant, which is a high-pressure gas introduced into the refrigerant line D2, passes through the solenoid valve 11 and is condensed in the second condenser 62 to radiate heat, thereby exchanging heat and raising the temperature of the passing air. To do. Further, the refrigerant is throttled by the expansion valve 47 and evaporated and absorbed by the second evaporator 60 to perform heat exchange to cool the passing air and to cool the three-way connector 9
Via the above, it merges with the refrigerant from the refrigerant line C2 described above, and is introduced again into the compressor 8 and circulated.

On the other hand, for hot water, the actuator 4
3, the water valve 50 is set to be closed, and the hot water line C1 is not functioning.

As a result, in the front seat air conditioner unit F,
The air selectively taken in from the inside and outside air is cooled by the first evaporator 42 to a target cold air temperature, and is not heated by the heater core 44. For example, the actuator 45 selectively selects a door (not shown). Driven to
It is blown into the passenger compartment from the front seat differential outlet, vent outlet, and foot outlet.

On the other hand, in the rear seat air conditioner unit R, the inside air taken in by the fan (not shown) is
When passing through the evaporator 60, it is cooled and dehumidified by exchanging heat with the refrigerant that expands via the expansion valve 64, and when passing through the second condenser 62, it exchanges heat with the refrigerant that condenses and dissipates heat. As a result, the temperature is raised, the air is mixed with the cold air that has not passed through the second condenser 62, and the air is conditioned to the target cold air temperature. For example, the actuator 63 selectively drives the door (not shown), It is blown into the passenger compartment from the foot outlet.

That is, the operating principle of the first embodiment during the cooling operation is the same as the conventional one, but the solenoid valves 11, 13, 14,
The feature is that the opening / closing of 15 is controlled to control the flow of the refrigerant.

As described above, the main feature of the first embodiment of the present invention is that it is connected to the refrigerant line instead of the heater core 62 connected to the conventional hot water line and arranged in the rear seat air conditioner unit R. While the second condenser 62 is arranged, a bypass line that bypasses the first condenser and can circulate the refrigerant is provided.

That is, since the bypass means for allowing the refrigerant to circulate around the first condenser to freely circulate and the refrigerant line for allowing the refrigerant to freely circulate to the second evaporator to which the second condenser is connected in series are provided, The refrigerant can be used as a heat source for raising the temperature of the air conditioning of the second air conditioning system.

Therefore, unlike the conventional dual type automotive air conditioner, only one hot water line is required, the piping configuration can be simplified, and the number of parts can be reduced. Therefore, the component cost and the assembly cost are reduced, and the productivity can be improved.

Further, since the second air conditioning system can perform dehumidification heating operation without using cooling water of the engine, when the outside air temperature in winter is low, for example, it is made to function as a heating device. Even in such a case, it is possible to establish a stable air conditioner cycle, to achieve both heating and dehumidification, and it is possible to stably remove water generated from the occupant or the like from the air.

Next, a second embodiment according to the present invention will be described with reference to FIG.

The feature of the second embodiment is that the refrigerant line C3 of the first air conditioning system C is the warm refrigerant line C of the first embodiment.
2 has a configuration in which a third capacitor 52 is added to improve the heating performance. The refrigerant line C1 of the first air conditioning system C and the refrigerant line D2 of the second air conditioning system D have the same configuration as in the first embodiment.

That is, the refrigerant line C3 of the first air conditioning system C has three-way connectors 9, 10, a compressor 8,
Solenoid valves 13, 14, 15, first condenser 5, check valve 1
6, liquid tank 6, third condenser 52, expansion valve 4
7 and a first evaporator 42.

In the front seat air-conditioning unit F, the intake door 46 driven by the actuator 41 and the first evaporator 4 are arranged in this order from the upstream side in the air passage.
2. An air mix door 49 whose opening is adjusted by the actuator 43, the third condenser 52, and the heater core 44 are arranged.

Next, the flow of the refrigerant and hot water (engine cooling water) during the dehumidifying and heating operation is changed to the front seat air conditioner unit F.
Will be described. The rear air conditioning unit R
The description is omitted because it is similar to the first embodiment.

Regarding the refrigerant, the solenoid valve 13 is set to be closed and the solenoid valves 11, 14 and 15 are set to be open, and the refrigerant lines C3 and D2 are made to function.

That is, the refrigerant compressed by the compressor 8 is bypassed without passing through the first condenser 5 and introduced into the liquid tank 6. Further, the refrigerant is branched by the three-way connector 10, part of which is introduced into the refrigerant line D2 and circulates as in the first embodiment, and the rest of the refrigerant passes through the solenoid valve 15 and is condensed by the third condenser 52 and radiates heat. As a result, heat exchange is performed to raise the temperature of the passing air. And the refrigerant is
The air that has been throttled by the expansion valve 47 and evaporated and absorbed by the first evaporator 42 performs heat exchange to cool the passing air, merge with the refrigerant from the refrigerant line D2 via the three-way connector 9, and It is reintroduced into the compressor 8 and circulated.

On the other hand, as for the hot water, as in the first embodiment, the hot water line C1 functions and the hot water (engine cooling water) supplied from the engine 4 is supplied to the heater core 44 and the passing air is supplied. The heat is exchanged to raise the temperature, and is then reintroduced into the engine 4 for circulation.

As a result, in the front seat air conditioner unit F,
The air selectively taken in from the inside and outside air is cooled by the first evaporator 42 and dehumidified, and then heated by the third condenser 52 and the heater core 44, and the air mix door 49 causes the third condenser 52 and the heater core 44 to move. It is mixed with cold air that has not passed through, air-conditioned to the target warm air temperature, and then blown out into the passenger compartment.

Next, the flow of the refrigerant and the hot water (engine cooling water) during the cooling operation will be described for the front seat air conditioner unit F with reference to FIG.

Regarding the refrigerant, the solenoid valve 14 is set to be closed and the solenoid valves 11, 13, 15 are set to be open, and the refrigerant lines C3 and D2 are made to function.

That is, the refrigerant compressed by the compressor 8 passes through the solenoid valve 13 without being bypassed and is introduced into the first condenser 5, where it is condensed and radiated to exchange heat with the outside air, and the liquid. It is introduced into the tank 6. Further, the refrigerant is branched by the three-way connector 10, part of which is introduced into the refrigerant line D2 and circulates as in the first embodiment, and the remaining part passes through the solenoid valve 15 and the third condenser 52.
The heat is exchanged by condensing and radiating heat to heat the passing air. Then, the refrigerant is throttled by the expansion valve 47 and evaporated and absorbed by the first evaporator 42 to exchange heat to cool the passing air, pass through the three-way connector 9, and come from the refrigerant line D2. And is reintroduced into the compressor 8 and circulated.

The refrigerant introduced into the refrigerant line D2 is circulated as in the dehumidifying and heating operation.

On the other hand, for hot water, the actuator 4
3, the water valve 50 is set to be closed, and the hot water line C1 is not functioning.

As a result, in the front seat air conditioner unit F,
The air selectively taken in from the inside and outside air is cooled by the first evaporator 42 to be dehumidified, then heated by the third condenser 52, and cooled by the air mix door 49 to cool air that has not passed through the third condenser 52. After being mixed and air-conditioned to the target cold air temperature, the air is blown into the passenger compartment.

As described above, the main feature of the second embodiment of the present invention is that the third capacitor is arranged in the air passage between the first evaporator and the heater core of the first air conditioner unit, and Since it is connected in series to the refrigerant line on the refrigerant inlet side of the first evaporator, the load of the hot water line can be reduced by using the refrigerant also as a heat source for raising the temperature of the air conditioning of the first air conditioning system.

That is, it is possible to improve the dehumidifying and heating function as compared with the first embodiment, but the main equipment that needs to be added is only one capacitor, so the productivity is also affected. Few.

Next, a third embodiment according to the present invention will be described with reference to FIG.

The feature of the third embodiment is that the refrigerant line C4 of the first air conditioning system C corresponds to the heater core 4 of the second embodiment.
4 is removed, all hot water lines are abolished, piping parts are reduced, and productivity is improved. The refrigerant line D2 of the second air conditioning system D has the first
It has the same configuration as the embodiment and the second embodiment.

That is, the refrigerant line C4 of the first air conditioning system C is the same as that of the second embodiment. However, in the front seat air conditioner unit F, the intake door 46 driven by the actuator 41, the first evaporator 42, and the actuator 43 are sequentially arranged from the upstream side in the air passage.
The air mix door 49 and the third condenser 52, whose opening degree is adjusted by, are arranged. Unlike the second embodiment, no heater core is arranged and the structure is the same as that of the rear seat air conditioner unit R. There is.

Next, the flow of the refrigerant during the dehumidifying and heating operation will be described with respect to the front seat air conditioner unit F. The rear seat air conditioner unit R is the same as that of the first embodiment, and therefore its explanation is omitted.

Regarding the refrigerant, the solenoid valve 13 is set to be closed and the solenoid valves 11, 14 and 15 are set to be open, and the refrigerant lines C4 and D2 are made to function.

That is, the refrigerant compressed by the compressor 8 is bypassed without passing through the first condenser 5 and introduced into the liquid tank 6. Further, the refrigerant is branched by the three-way connector 10, part of which is introduced into the refrigerant line D2 and circulates as in the first embodiment, and the rest of the refrigerant passes through the solenoid valve 15 and is condensed by the third condenser 52 and radiates heat. As a result, heat exchange is performed to raise the temperature of the passing air. And the refrigerant is
The air that has been throttled by the expansion valve 47 and evaporated and absorbed by the first evaporator 42 performs heat exchange to cool the passing air, merge with the refrigerant from the refrigerant line D2 via the three-way connector 9, and It is reintroduced into the compressor 8 and circulated.

As a result, in the front seat air conditioning unit F,
The air selectively taken in from the inside and outside air is cooled by the first evaporator 42 to be dehumidified, then heated by the third condenser 52, and cooled by the air mix door 49 to cool air that has not passed through the third condenser 52. After being mixed and air-conditioned to the target warm air temperature, it is blown into the vehicle interior.

Next, the flow of the refrigerant during the cooling operation will be described for the front seat air conditioner unit F with reference to FIG.

Regarding the refrigerant, the solenoid valve 14 is set to be closed and the solenoid valves 11, 13, 15 are set to be open, and the refrigerant lines C4 and D2 are made to function.

That is, the refrigerant compressed by the compressor 8 passes through the solenoid valve 13 without being bypassed and is introduced into the first condenser 5, where it is condensed and radiated to perform heat exchange with the outside air, and the liquid. It is introduced into the tank 6. Further, the refrigerant is branched by the three-way connector 10, part of which is introduced into the refrigerant line D2 and circulates as in the first embodiment, and the remaining part passes through the solenoid valve 15 and the third condenser 52.
The heat is exchanged by condensing and radiating heat to heat the passing air. Then, the refrigerant is throttled by the expansion valve 47 and evaporated and absorbed by the first evaporator 42 to exchange heat to cool the passing air, pass through the three-way connector 9, and come from the refrigerant line D2. And is reintroduced into the compressor 8 and circulated.

The refrigerant introduced into the refrigerant line D2 circulates as in the dehumidifying and heating operation.

As a result, in the front seat air conditioner unit F,
The air selectively taken in from the inside and outside air is cooled by the first evaporator 42 to be dehumidified, then heated by the third condenser 52, and cooled by the air mix door 49 to cool air that has not passed through the third condenser 52. After being mixed and air-conditioned to the target cold air temperature, the air is blown into the passenger compartment.

As described above, the main features of the third embodiment according to the present invention are the bypass means for allowing the refrigerant to circulate freely around the first condenser and the first means in which the third condenser is connected in series. A refrigerant line that allows the refrigerant to freely circulate in the evaporator, a second condenser connected in series to allow the refrigerant to freely circulate in the second evaporator, and a second condenser connected in series that allows the refrigerant to freely flow in the second evaporator. That is, a refrigerant line or the like that can be circulated is provided.

That is, since the refrigerant can be used as a heat source for raising the temperature of the air conditioning of the first air conditioning system and the second air conditioning system, no hot water line is required. Therefore, even when the outside air temperature is low, it is possible to perform a stable dehumidifying and heating operation, and it is possible to stably remove water generated by the occupant or the like from the air.

Also, unlike the conventional dual-type automotive air conditioner, since no hot water line is required, the piping structure can be simplified and the number of parts can be reduced. Therefore, the component cost and the assembly cost are reduced, and the productivity can be improved.

[0080]

As described above, according to the present invention, the following effects can be obtained by the configurations described in the respective claims.

According to the first and second aspects of the invention, there is provided a bypass means for bypassing the first condenser to circulate the refrigerant freely, and a second means in which the second condenser is connected in series. Since the evaporator is provided with a refrigerant line or the like that allows the refrigerant to circulate freely, the refrigerant can be used as a heat source for raising the temperature of the air conditioning of the second air conditioning system, and only one hot water line is required. Therefore, even when the outside air temperature is low, it is possible to perform a stable dehumidifying and heating operation, and it is possible to stably remove the water generated by the occupants and the like from the air, while requiring only one hot water line. Therefore, productivity can be improved by simplifying the piping configuration.

In the structure described in claim 3, the third condenser is arranged in the air passage between the first evaporator of the first air conditioner unit and the heater core, and the refrigerant inlet of the first evaporator is arranged. Since it is connected in series to the refrigerant line on the side, the refrigerant can also be used as a heat source for raising the temperature of the air conditioning of the first air conditioning system, and while reducing the load on the hot water line, the main equipment that needs to be added is: There is only one capacitor. Therefore, in the configurations described in claim 4 and claim 5, it is possible to perform a more stable dehumidifying and heating operation, and the effect on productivity is small, and the refrigerant bypasses the first condenser. A bypass means for freely circulating the refrigerant, a refrigerant line for freely circulating the refrigerant to the first evaporator to which the third condenser is connected in series, and a refrigerant line to the second evaporator to which the second condenser is connected in series. Since a refrigerant line that can circulate, a second condenser is connected in series, and a refrigerant line that allows the refrigerant to circulate freely in the second evaporator, etc., are provided, the refrigerant is increased in air conditioning in the first air conditioning system and the second air conditioning system. Since it can be used as a heat source for heating, it does not require a hot water line. Therefore, even when the outside air temperature is low, it is possible to perform a stable dehumidifying and heating operation, and it is possible to stably remove moisture generated from the occupant or the like from the air, while not requiring a hot water line, Productivity can be improved by simplifying the piping configuration.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram for explaining a configuration and a dehumidifying heating operation of a first embodiment of an automobile air conditioner according to the present invention.

FIG. 2 is a schematic configuration diagram for explaining a cooling operation in the first embodiment of FIG.

FIG. 3 is a schematic configuration diagram for explaining a configuration and a dehumidifying and heating operation of a second embodiment of an automobile air conditioner according to the present invention.

FIG. 4 is a schematic configuration diagram for explaining a cooling operation in the second embodiment of FIG.

FIG. 5 is a schematic configuration diagram for explaining a configuration and a dehumidifying and heating operation of a third embodiment of an air conditioner for a vehicle according to the present invention.

FIG. 6 is a schematic configuration diagram for explaining a cooling operation in the third embodiment of FIG.

FIG. 7 is a schematic configuration diagram showing an example of a conventional automobile air conditioner.

[Explanation of symbols]

 5, 52, 62 ... Condenser, 42, 60 ... Evaporator, 44 ... Heater core, 49, 65 ... Air mix door 49, A1, B1, C1 ... Hot water line, A2, B2, C2, C3, C4, D2 ... Refrigerant line , F: first air conditioner unit, R: second air conditioner unit.

Claims (5)

[Claims] 1. A first air conditioning system having a first air conditioner unit (F) for air-conditioning the selectively taken in and outside air and supplying the air to the first section, and first air-conditioning the taken-in air. In a vehicle air conditioner configured with a second air conditioning system having a second air conditioning unit (R) that supplies two compartments, a bypass means that allows the refrigerant to circulate freely around the first condenser (5). A first evaporator (42) having an expansion means (47) for adiabatically expanding the refrigerant and a heater core (44) are arranged in order from the upstream side in the air passage of the first air conditioner unit (F). In the air passage of the second air conditioner unit (R), a second evaporator (60) having an expansion means (64) for adiabatically expanding the refrigerant and a second condenser (62) are installed. The first air conditioning system is arranged in order from the side, and the first air conditioning system includes a refrigerant line that allows the first evaporator (42) to freely circulate a refrigerant, and hot water that allows the heater core (44) to freely circulate engine cooling water. And a second air conditioning system, the second condenser (6)
2. An air conditioner for an automobile, characterized in that 2) has a refrigerant line capable of freely circulating a refrigerant through the evaporator (60) connected in series. 2. The bypass means comprises a bypass branch portion provided in the middle of piping between the refrigerant outlet of the compressor (8) and the refrigerant inlet of the first condenser (5), and the first condenser (5). A bypass line connecting a refrigerant outlet and a refrigerant inlet of the first evaporator (42), which is provided in the middle of the pipe, and valve means (1) capable of adjusting the amount of refrigerant bypassed.
4), and valve means (1) capable of adjusting the amount of refrigerant introduced into the first condenser (5) provided in the middle of the piping between the bypass branch section and the first condenser (5).
3), the refrigerant line of the first air conditioning system is configured such that the refrigerant outlet of the compressor (8) is connected in series with the first evaporator (42) to the first condenser (5). Is formed by connecting the refrigerant outlet of the first evaporator (42) to the refrigerant inlet of the compressor (8), and connecting the bypass junction and the expansion means (47) in the middle of the pipe. Valve means (15) capable of adjusting the amount of refrigerant circulating to the heater core (44) is provided in the hot water line of the first air conditioning system. And a hot water outlet of the heater core (44) connected to the hot water inlet of the cooling water jacket (4) and capable of adjusting the circulating hot water amount. Means (50) are provided, and the refrigerant line of the second air conditioning system is provided in the middle of piping between the refrigerant outlet of the first evaporator (42) and the refrigerant inlet of the compressor (8) and the bypass merging portion. A branch portion (9, 10) is provided in the middle of the piping with the valve means (15), and the branch portion (1
0) is connected to the refrigerant inlet of the second condenser (62) to which the second evaporator (60) is connected in series, and the refrigerant outlet of the second evaporator (60) is connected to the branch portion (9). And a valve means (11) capable of adjusting the amount of circulating refrigerant.
0) and the said 2nd condenser (62) are provided in the middle of piping, The air conditioning apparatus for motor vehicles of Claim 1 characterized by the above-mentioned. 3. A third condenser (52) is arranged in the air passage between the first evaporator (42) and the heater core (44), and a refrigerant inlet of the first evaporator (42). 3. The vehicle air conditioner according to claim 1, wherein the air conditioner is connected in series to the refrigerant line on the side. 4. A first air conditioning system having a first air conditioner unit (F) for air-conditioning the selectively taken in and outside air and supplying the air to the first compartment, and a first air conditioning system for air-conditioning the taken inside air. In a vehicle air conditioner configured with a second air conditioning system having a second air conditioning unit (R) that supplies two compartments, a bypass means that allows the refrigerant to circulate freely around the first condenser (5). A first evaporator (42) provided with an expansion means (47) for adiabatically expanding the refrigerant and a third condenser (52) in the air passage of the first air conditioner unit (F) from the upstream side. A second evaporator (60) and a second condenser (62), which are arranged in order and have expansion means (64) for adiabatically expanding the refrigerant in the air passage of the second air conditioner unit (R). Were placed in order from the upstream side, the first air conditioning system, said third capacitor (5
The second evaporator (60) in which 2) is connected in series
A refrigerant line that allows the refrigerant to freely circulate, and the second air conditioning system includes the second condenser (6
The second evaporator (60) in which 2) is connected in series
An air conditioner for a vehicle, which has a refrigerant line through which a refrigerant can freely circulate. 5. The bypass means includes a bypass branch portion provided in the middle of piping between the refrigerant outlet of the compressor (8) and the refrigerant inlet of the first condenser (5), and the first condenser (5). A bypass line connecting a refrigerant outlet and a refrigerant inlet of the first evaporator (42), which is provided in the middle of the pipe, and valve means (1) capable of adjusting the amount of refrigerant bypassed.
4), and valve means (1) capable of adjusting the amount of refrigerant introduced into the first condenser (5) provided in the middle of the piping between the bypass branch section and the first condenser (5).
4) and the refrigerant line of the first air conditioning system is configured such that the refrigerant outlet of the compressor (8) is connected to the refrigerant of the first condenser (5) in series with the third condenser (52). Connected to the inlet, the third capacitor (5
The refrigerant outlet of 2) is connected to the refrigerant inlet of the first evaporator (42) to which the compressor (8) is connected in series, and the pipe of the bypass merging portion and the expansion means (47) is formed. A valve means (15) capable of adjusting the amount of refrigerant circulating in the middle is provided, and the refrigerant line of the second air conditioning system includes a refrigerant outlet of the first evaporator (42) and a refrigerant inlet of the compressor (8). A branch part (9, 10) is provided in the middle of the piping between the bypass confluence part and the valve means (15), and the branch part (1
0) is connected to the refrigerant inlet of the second condenser (62) to which the second evaporator (60) is connected in series, and the refrigerant outlet of the second evaporator (60) is connected to the branch portion (9). And a valve means (11) which is formed by the above-mentioned method and is capable of adjusting the circulating refrigerant amount.
The air conditioner for a vehicle according to claim 4, wherein the air conditioner is provided in the middle of a pipe between the second condenser (62) and the second condenser (62).