JPH0755613B2 - Air conditioner for vehicle - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a vehicle air conditioner (hereinafter, simply referred to as a vehicle air conditioner), and more particularly to a vehicle air conditioner that cools a vehicle air conditioner control device. Is.

[Conventional technology]

FIG. 2 is a configuration diagram of a conventional vehicle air conditioner, FIG. 3 is a system diagram showing the refrigeration cycle and air flow, and FIG. 4 is a schematic front view of the vehicle air conditioner mounted on a vehicle.

In the figure, 1 is a vehicle air conditioner, 2 is an electric compressor, 3
Is a heat exchanger for a condenser for cooling the high-pressure and high-temperature refrigerant compressed by the electric compressor 2 with the outside air 18, and 4 is a room temperature high-pressure refrigerant cooled by the condenser heat exchanger 3 for rapid expansion. Expansion means for lowering the temperature, 5 is a heat exchanger for an evaporator for exchanging heat of the return air which has been heated and has recirculated from the inside of a passenger car by a refrigerant having a low temperature, and 6 is heat for a condenser. A condenser blower for passing outside air 18 through the exchanger 3, 7 an evaporator blower for sucking and sending return air 16 that recirculates from the passenger compartment of the passenger compartment to be cooled by the evaporator heat exchanger 5, 8 an air conditioner for the vehicle An air-conditioning control device storage box housing the control device 9, 10 is an exhaust fan for discharging the air that has cooled the vehicle air-conditioning control device 9, and 11 is dust-proofing and waterproofing of return air 16 that is circulated from the inside of the vehicle and air-conditioned. Air file for performing It is.

Reference numeral 12 denotes a high-temperature high-pressure refrigerant that has been compressed by the electric compressor 2 and has become high-temperature high-pressure, and the arrow indicates its flow. Further, 13 is a room-temperature high-pressure refrigerant which has been heated by the heat exchanger 3 for condenser to normal temperature and its flow, 14 is a low-temperature low-pressure refrigerant which has been low-temperature and low-pressure by the expansion means 4 and its flow, and 15 is heat exchanger for an evaporator The normal temperature low pressure refrigerant which has finished heat exchange with the return air 16 in the vessel 5 and its flow are shown.

17 is cold air that has undergone heat exchange in the evaporator heat exchanger 5, 18
Is the outside air taken in by the condenser blower 6 to cool the refrigerant in the condenser heat exchanger 3, and 19 is the released outside air that is released after heat exchange.

Reference numeral 20 is a vehicle body, 21 is a partition wall that isolates the vehicle air-conditioning control device 9 from other parts of the vehicle air-conditioning system 1, and this partition wall 21 is sucked with return air 16 before passing through the evaporator heat exchanger 5. An intake port 22 for operating the exhaust gas and an exhaust port 23 communicating with the evaporator blower 7 side are provided. In addition, the air conditioning control device storage box 8
Also, an intake port and an exhaust port for cooling air are provided facing the intake port 22 and the exhaust port 23 of the partition wall 21.

Next, the operation of this conventional device will be described.

In FIG. 2, the high-temperature high-pressure refrigerant 12 compressed by the electric compressor 2 into the high-temperature high-pressure refrigerant is heat-exchanged with the outside air 18 by the condenser blower 6 in the process of passing through the condenser heat exchanger 3. At 13, it is expanded by the expansion means, for example, the capillary type capillary tube 4, and becomes the low temperature low pressure refrigerant 14.

Next, in the process in which the low-temperature low-pressure refrigerant 14 passes through the evaporator heat exchanger 5, the evaporator blower 7 sucks the return air (in-vehicle air) 16, and the return air air filter 11 is used to pass the evaporator heat exchange. The heat is exchanged in the vessel 5 to form the cold air 17 to cool the inside of the vehicle.

Further, a part of the return air 16 is taken in through the partition wall 21 and the intake port 22 of the air conditioning control device storage box 8 and flows in from one side of the vehicle air conditioning control device 9 inside to cool the device 9. After that, the exhaust fan 10 passes through the air-conditioning control device storage box 8 and the exhaust port 23 of the partition wall 21 and flows out to the evaporator blower 7 side, and the remaining return air 16 is cooled with the cool air cooled by the evaporator heat exchanger 5. , Is blown by the evaporator blower 7, and is operated so as to cool the inside of the vehicle as cold air 17.

[Problems to be Solved by the Invention]

Since the conventional vehicular air-conditioning system is configured as described above, there is a problem that if a failure such as equipment burnout occurs in the vehicular air-conditioning control device, smoke is returned to the interior of the vehicle together with return air.

The present invention has been made to solve the above problems, and an object thereof is to obtain a highly safe vehicular air conditioner configured to exhaust smoke to the outside of a vehicle in the event of a failure such as equipment burnout. .

[Means for Solving the Problems]

A vehicle air conditioner according to the present invention, a damper for selecting whether to exhaust the air in the installation space of the vehicle air conditioning control device to the outside of the vehicle or to the evaporator blower side, and to detect smoke generation, and to open the vehicle outside exhaust port. The damper drive means drives the damper so as to close the exhaust port on the side of the blower for the open evaporator.

[Action]

The vehicle air conditioner according to the present invention cools the vehicle air conditioner control device by utilizing the return air that flows back from the inside of the vehicle, so that the cooling can be performed efficiently and economically, and smoke can be detected when a fire occurs. By operating the damper and closing the exhaust port of the return air to the evaporator blower side with this damper to open the exhaust port outside the vehicle, it is possible to prevent smoke from flowing into the vehicle and improve safety.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. First
In the figure, 24 is the return air 16 provided in the main body of the device.
Is an exhaust port to the outside of the vehicle, 25 is a damper for selectively opening and closing the exhaust port 23 of the return air 16 toward the evaporator blower 7 side and the exhaust port 24 to the outside of the vehicle, and 26 is a damper driving means.

The same parts as those in FIG. 2 are designated by the same reference numerals and the description thereof will be omitted.

Next, the operation of the above embodiment will be described. The vehicle air-conditioning controller 9 uses a part of the cooling operation and the return air 16 inside the vehicle.
The operation of cooling is the same as that of the conventional device.

When the vehicle air-conditioning control device 9 has a malfunction such as burnout of the device, for example, a signal from a smoke detection device (not shown),
The damper driving means 26 rotates the damper 25 from the dotted line position to the solid line position in response to a serious failure signal from the vehicle air conditioning control device 9 and a signal from a miscellaneous gas sensor (not shown) that detects O ₂ , cigarette smoke and the like. Then, the discharge port 23 is closed and the discharge port 24 is opened.

For this reason, the return air 16 including smoke is discharged from the discharge port 24 to the outside of the vehicle and does not flow into the vehicle, and it is possible to prevent a factor that causes careless confusion.

Although the detailed structure is not shown in the above-described embodiment, the damper 25 is normally provided with an urging spring (not shown) to close the discharge port 24 to the outside of the vehicle, and the damper driving means 26 is attached only when the driving means 26 is operating. The exhaust port 23 is closed by rotating against the bias spring.

In the above embodiment, the air conditioning control device storage box 8 is provided with an exhaust fan.
Although one provided with 10 is shown, the exhaust fan 10 may be omitted by utilizing the air flow due to the negative pressure of the blower 7 for the evaporator, and the same effect as the above-mentioned embodiment is obtained.

Further, in the above embodiment, the vehicle air conditioning control device 9 is cooled by a part of the return air 16 before passing through the evaporator heat exchanger 5, and as a device therefor, the partition wall 21 and the air conditioning control device storage box 8 are used. Although the intake port 22 installed in the above is communicated with the return air 16 before passing through the evaporator heat exchanger 5, the present invention is not limited to this, and by the cool air 17 that has passed through the evaporator heat exchanger 5 and is being cooled. It may be cooled, and therefore, the intake port 22 may be communicated with the cold air, and the same effect as that of the above-described embodiment is obtained.

〔The invention's effect〕

As described above, according to the present invention, the vehicle air-conditioning control device is cooled by the low-temperature return air or cold air, so that the cooling can be performed efficiently and economically. Also, when the vehicle air-conditioning control device has a failure such as equipment burnout, the air in the vehicle air-conditioning control device storage box is exhausted to the outside of the vehicle, so smoke does not flow into the vehicle and care is taken. It has the effect of preventing such confusion.

[Brief description of drawings]

FIG. 1 is a block diagram showing a vehicle air conditioner according to an embodiment of the present invention, FIG. 2 is a block diagram of a conventional vehicle air conditioner, and FIG. 3 is a system diagram showing the refrigeration cycle and the flow of air. Fourth
The figure is a schematic front view of a vehicle equipped with a vehicle air conditioner. 1 is a vehicle air conditioner, 3 is a condenser heat exchanger, 6 is a condenser blower, 21 is a partition wall, 22 is an intake port, 23 is an exhaust port, 24 is an exhaust port, 25 is a damper, and 26 is a damper driving means. In the drawings, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Claims] 1. An air conditioning control device for a vehicle, a heat exchanger for an evaporator, and a partition wall for isolating an installation space of an evaporator blower installed on the outlet side of the evaporator heat exchanger, and the evaporator heat exchanger. An intake port provided in the partition wall so that either one of the intake side and the discharge side communicates with one side of the vehicle air conditioning control device, the other side of the vehicle air conditioning control device, and the evaporator blower. A first exhaust port provided in the partition wall so as to communicate with the second partition, and a second exhaust port provided in the device main body so as to communicate the installation space of the vehicle air conditioning control device with the outside of the vehicle.
Exhaust port, a damper that selectively opens and closes the first and second exhaust ports, and smoke generation in the installation space of the vehicle air conditioning control device to detect the damper to open the first exhaust port. A vehicle air conditioner comprising: a damper driving unit that closes and rotates the second exhaust port to an open position.