JPH1035268A - On-vehicle air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air conditioner with a simple structure without need for using special refrigerant by conducting switching control of applying to a Peltier element which is between a water cooling heat exchanger and an air cooling heat exchanger. SOLUTION: A heat exchanger 14 is so constructed that a Peltier element 13 can be clamped by a water cooling heat exchanger 11 and an air cooling heat exchanger 12. The first solenoid valve 19 and the second solenoid valve 20 conduct connection switching of a fan radiator 16 and a waste heat recovery device 15 alternatively to the water cooling heat exchanger 11. A switching control means controls the operation of the first solenoid valve 19 and the second solenoid valve 20, and switches voltage applied to the Peltier element 13. When cooling operation is started, a control signal is outputted from the control means to a switching means, thus causing the first solenoid valve 19 to open and the second solenoid valve 20 to close. Therefore, the water cooling heat exchanger 11 is connected to the fan radiator 16. Positive voltage is applied to the Peltier element 13 to cool the air cooling heat exchanger 12 side and operate a pump 17.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner, and more particularly to an air conditioner mounted on a vehicle.

[0002]

2. Description of the Related Art Conventionally, an air conditioner mounted on an electric vehicle or the like has a structure shown in FIG.
The air conditioner 1 includes an air conditioning duct 2 and a duct 2
And an air flow adjusting damper 3 that is provided at an upstream end of the air flow and adjusts the amount of air sucked into the duct 2, and is provided downstream of the air flow adjusting damper 3 to suck air into the duct 2. A blower 4, a heat exchanger 5 provided downstream of the blower 4 and exchanging heat with air sent by the blower 4, a compressor 6 for compressing a refrigerant sent to the heat exchanger 5, This is a vapor compression type air conditioner including a radiator with a fan 7 that performs heat exchange between the refrigerant that has completed heat exchange in the heat exchanger 5 and outside air.

[0003]

However, such a conventional air conditioner 1 is of a vapor compression type and requires a special refrigerant, and depending on the refrigerant used, it has an adverse effect on the environment due to leakage or the like. May be given. In addition, the use of the compressor not only complicates the structure, but also requires a long time for restarting, and the interior of the vehicle may become uncomfortable or the glass surface may become cloudy before a stable operation state is achieved. The present invention has been made in view of such a conventional problem, and has a simple structure, and
It is an object to solve the problem of providing a high-efficiency in-vehicle air conditioner without using a special refrigerant.

[0004]

According to a first aspect of the present invention, in order to solve the above-mentioned problems, a Peltier element is formed by a water-cooled heat exchanger and an air-cooled heat exchanger. A heat exchange unit sandwiched therebetween, a waste heat recovery unit mounted on the vehicle, a radiator with a fan connected in parallel with the waste heat recovery unit, the radiator with a waste heat recovery unit or a fan, and the water cooling unit. A pump for circulating heat exchange water between the heat exchanger and the heat exchanger; a connection switching means for selectively connecting the radiator with fan and the waste heat recovery unit to the water-cooled heat exchanger; and a connection switching means. Control means for controlling the operation of the Peltier element and switching the applied voltage to the Peltier element.

According to a second aspect of the present invention, there is provided an on-vehicle air conditioner comprising: a plurality of heat exchange units each having a Peltier element sandwiched between a water-cooled heat exchanger and an air-cooled heat exchanger; A waste heat recovery device mounted on the radiator with a fan connected in parallel with the waste heat recovery device, and a water circulating heat exchanger between the radiator with the fan and each of the water-cooled heat exchangers. 1 pump, a second pump for circulating water for heat exchange between the waste heat recovery unit and each of the water-cooled heat exchangers, and selectively radiating the radiator with a fan and the waste heat recovery unit to each of the water cooling units. It is characterized by comprising connection switching means connected to the heat exchanger, and control means for controlling the operation of the connection switching means and switching the applied voltage to each of the Peltier elements.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. The on-vehicle air conditioner according to the present embodiment, which is denoted by reference numeral 10 in FIG. 1, includes a heat exchange unit 14 configured with a Peltier element 13 sandwiched between a water-cooled heat exchanger 11 and an air-cooled heat exchanger 12, A waste heat recovery unit 15 mounted on a vehicle, a radiator 16 with a fan connected in parallel with the waste heat recovery unit 15, the waste heat recovery unit 15 or the radiator 16 with a fan and the water-cooled heat exchanger 11 Pump 17 for circulating heat exchange water between the
A first solenoid valve 19 serving as connection switching means for selectively connecting the waste heat recovery unit 15 to the water-cooled heat exchanger 11.
And a second electromagnetic valve 20, and control means (not shown) for controlling the operation of the first electromagnetic valve 19 and the second electromagnetic valve 20 and switching and controlling the voltage applied to the Peltier element 13. ing.

Next, these details will be described.
Air-cooled heat exchange air 12 constituting the heat exchange unit 14
Is located in a duct (not shown) that takes in outside air into the vehicle, and performs heat exchange with the outside air drawn into the duct.

The waste heat recovery unit 15 is, for example, a waste heat recovery unit using heat discharged from a motor when the vehicle is an electric vehicle, and a vehicle using ordinary fossil fuel. In some cases, it is a waste heat recovery unit using waste heat from an internal combustion engine.

A first electromagnetic valve 19 as the connection switching means is provided on the inlet side of the radiator 16 with a fan, and a second electromagnetic valve 20 is provided on the outlet side of the waste heat recovery unit 15. I have.

The operation of the vehicle-mounted air conditioner 10 thus configured will be described below. First, during the cooling operation, a control signal is output from the control means to the switching means 18 to open the first solenoid valve 19 and close the second solenoid valve 20 as shown in FIG. , The water-cooled heat exchanger 11 and the radiator 16 with a fan
And the waste heat recovery unit 15 is disconnected from the circulation path. When a positive voltage is applied to the Peltier element 13, the air-cooled heat exchanger 12 is cooled and the pump 17 is operated.

As a result, water is circulated between the water-cooled heat exchanger 11 and the radiator 16 with a fan. After the circulating water is cooled in the radiator 16 with the fan, the water is cooled. To cool one surface of the Peltier element 13 in the water-cooled heat exchanger 11.

In the Peltier device 13, heat is absorbed by heat exchange with the air-cooled heat exchanger 12 on the other surface, and this heat is transmitted to the circulating water in the water-cooled heat exchanger 11. After being absorbed, it is sent to the radiator with fan 16 and released to the outside air. Accordingly, in the air-cooled heat exchanger 12, the air that is brought into contact with the air-cooled heat exchanger 12 is cooled and sent into the vehicle, thereby performing cooling in the vehicle.

In the heating operation, the first solenoid valve 19 is closed and the second solenoid valve 20 is opened, so that the water-cooled heat exchanger 11 and the waste heat recovery unit 15 are connected. The radiator with fan 16 is disconnected from the circulation path. When a negative voltage is applied to the Peltier element 13, the air-cooled heat exchanger 12 is heated and the pump 17 is operated.

Thus, the heat recovered in the waste heat recovery unit 15 is transmitted to the water-cooled heat exchanger 11 by the circulating water, and flows in the air-cooled heat exchanger 12 in combination with the heating action of the Peltier element 13. After the air is heated, it is sent into the vehicle to heat the vehicle.

As described above, according to the vehicle-mounted air conditioner 10 according to the present embodiment, the air is heated using the heating action of the Peltier device 13 and the Peltier device 13 is heated by waste heat generated in the vehicle. Since the heating of the water-cooled heat exchanger 11 is performed, efficient heating can be performed, and sufficient heating can be performed even when the temperature of the outside air is low. Further, at the time of cooling, the air-cooled heat exchanger 12 is
In the radiator 16 with fan, the heat absorbed is forcibly released to the outside air, so that efficient cooling is performed, and a movable member such as a compressor is not required, thereby simplifying the structure. In addition, by adjusting the voltage applied to the Peltier element 13, the degree of heating and the degree of cooling in the air-cooled heat exchanger 12 are finely controlled.
High-precision temperature adjustment is performed.

Next, another embodiment of the present invention will be described with reference to FIGS. The on-vehicle air conditioner 30 according to the present embodiment includes a first heat exchange unit 14a.
And a second heat exchange unit 14b, and the first heat exchange unit 14a is provided with a radiator 16 with a fan.
The waste heat recovery unit 15 is connected to the second heat exchange unit 14b.

The first pump 17a and the second pump 1 are connected to the outlets of the heat exchange units 14a and 14b, respectively.
7b, and a radiator 1 with a fan.
A check valve 31 is provided on the outlet side of the water-cooled heat exchangers 11 constituting the heat exchange units 14a and 14b.
a and 11b correspond to the pumps 17a and 17b, respectively.
Are communicated with each other on the upstream side by a communication pipe 32, and a second solenoid valve 33 is provided in the middle of the communication pipe 32.

Further, each of the heat exchange units 14a, 14
b on the downstream side of the check valve 31
4, a first solenoid valve 35 is provided in the middle of the communication pipe 34, and the inlet side of the water-cooled heat exchanger 11b of the second heat exchange unit 14b and the waste heat recovery unit A check valve 36 is provided at a position upstream of the communication pipe 34 between the second pump 17 b and the waste heat recovery device 15.
Is provided.

The two heat exchange units 14a, 1
4b each air-cooled heat exchanger 12a, 12b
Are installed in the same duct at intervals in the length direction.

Next, the operation of the present embodiment thus configured will be described with reference to FIG. First, in the case of the cooling operation in which the temperature is relatively high (shown as cooling 1 in FIG. 4), the first solenoid valve 35 and the second solenoid valve 33 are closed, and the first pump 17a is operated. Further, the second pump 17b is stopped, the fan is operated, and the first heat exchange unit 1 is stopped.
By applying a positive voltage to the Peltier element 13a of 4a, the air-cooled heat exchanger 12a side is cooled and the water-cooled heat exchanger 11a side is warmed.

Thus, the air flowing through the duct is cooled only by the air-cooled heat exchanger 12a of the first heat exchange unit 14a, and the heat released from the Peltier element 13a is cooled by the water-cooled heat exchanger 11a and the fan. The air is forcibly discharged to the outside air via the radiator 16. Therefore, cooling only by the first heat exchange unit 14a is performed.

Next, in the case of cooling operation at a relatively low temperature (shown as cooling 2 in FIG. 4), the two solenoid valves 33, 3 which were closed in the setting of cooling 1
5 is released.

Thus, the two heat exchange units 14a,
Each of the water-cooled heat exchangers 11a and 11b of 14b is connected to a radiator 16 with a fan, and heat exchange water is provided between the water-cooled heat exchangers 11a and 11b and the radiator 16 with a fan by a first pump 17a. Is further circulated, and a positive voltage is applied to both the Peltier elements 13a and 13b, so that the two air-cooled heat exchangers 1
The sides 2a and 12b are cooled. Therefore, the outside air cooled in one air-cooled heat exchanger 12a is sent to the other air-cooled heat exchanger 12b to be further cooled, and cooling at a low temperature is performed.

In the case of the dehumidifying and heating operation, both the solenoid valves 33 and 35 are closed so that the heat exchange units 14a and 14b are closed.
And operating them individually, and
A positive voltage is applied to the Peltier element 13a of the first heat exchange unit 14a, and a negative voltage is applied to the Peltier element 13b of the second heat exchange unit 14b.

Thus, the first heat exchange unit 14a
The outside air cooled and dried by the second heat exchange unit 14b is heated by the second heat exchange unit 14b, so that low-humidity air heated to a low temperature is supplied into the vehicle,
Dehumidification is performed while heating.

Further, with the operation of the radiator with fan 16 stopped, the combination of opening and closing the solenoid valves 33 and 35 and the combination of the operation of both pumps 17a and 17b,
Furthermore, by changing the combination of the application of the negative voltage to both Peltier elements 13a and 13b, heating at a low temperature or heating at a high temperature is performed.

The various shapes, dimensions, and the like of each component shown in each of the above embodiments are merely examples, and can be variously changed based on design requirements and the like.

[0028]

As described above, according to the first aspect of the present invention,
According to the on-vehicle air conditioner according to the above, heating using waste heat generated in the vehicle by the waste heat recovery device and heating of the air using the heating action by the Peltier element perform efficient heating. Can be performed, and sufficient heating can be performed even when the temperature of the outside air is low. In addition, during cooling, the heat absorbed in the air-cooled heat exchanger by the Peltier element is forcibly released to the outside air by the radiator with a fan, so that efficient cooling can be performed.
The structure can be simplified by eliminating the need for a movable member such as a compressor. In addition, by adjusting the voltage applied to the Peltier element, the degree of heating and cooling in the air-cooled heat exchanger can be finely controlled, so that high-precision temperature adjustment can be performed and used as a coolant in vehicles. Since the used water is used as heat exchange water, even if a leak or the like occurs, there is no effect on the environment.

According to the vehicle air conditioner according to the second aspect of the present invention, by adjusting the combination of the plurality of heat exchange units, the radiator with the fan and the waste heat recovery unit, the other types can be obtained. Air conditioning function can be realized.

[Brief description of the drawings]

FIG. 1 is a system configuration diagram showing an embodiment of the present invention.

FIG. 2 is a view showing the operation relationship of each component for explaining the operation of the embodiment of the present invention.

FIG. 3 is a system configuration diagram showing another embodiment of the present invention.

FIG. 4 is a view showing an operation relationship of each constituent member for explaining an operation of another embodiment of the present invention.

FIG. 5 is a system configuration diagram of a conventional vehicle air conditioner.

[Explanation of symbols]

 10, 30 In-vehicle air conditioner 11 Water-cooled heat exchanger 12 Air-cooled heat exchanger 13, 13a, 13b Peltier element 14, 14a, 14b Heat exchange unit 15 Waste heat recovery unit 16 Radiator with fan 17, 17a, 17b Pump 19, 20, 33, 35 Solenoid valve (connection switching means)

Claims (2)

[Claims] 1. A heat exchange unit having a Peltier element sandwiched between a water-cooled heat exchanger and an air-cooled heat exchanger, a waste heat recovery device mounted on a vehicle, and a waste heat recovery device arranged in parallel with the waste heat recovery device. A radiator with a fan connected to the pump, a pump for circulating heat exchange water between the waste heat recovery unit or the radiator with a fan and the water-cooled heat exchanger, and the radiator with a fan and the waste heat recovery unit. A connection switching means for selectively connecting to the water-cooled heat exchanger, and a control means for controlling the operation of the connection switching means and switching and controlling the voltage applied to the Peltier element. In-vehicle air conditioner. 2. A plurality of heat exchange units configured with a Peltier element sandwiched between a water-cooled heat exchanger and an air-cooled heat exchanger, a waste heat recovery device mounted on a vehicle, and the waste heat recovery device. A radiator with a fan connected in parallel, a first pump for circulating water for heat exchange between the radiator with the fan and each of the water-cooled heat exchangers, a waste heat recovery unit and each of the water-cooled heat exchangers A second pump for circulating heat exchange water between the heat exchanger, a connection switching unit for selectively connecting the radiator with fan and the waste heat recovery unit to each of the water-cooled heat exchangers, and a connection switching unit Control means for controlling the operation of the Peltier element and switching the applied voltage to each of the Peltier elements.