JPS60255528A - Cooler for car - Google Patents

Abstract

PURPOSE:To permit the cooling for a car interior at a low cost independent from an engine and batteries by allowing the condensed and liqufied coolant to circulate into an evaporator and allowing the cooled absorbing liquid to circulate into an absorber by a pair of pumps operated by solar batteries. CONSTITUTION:When liquefied coolant is sent into an evaporator 1 from a condenser 4 by a pump 6, coolant is jetted-out in mist form from a plurality of nozzles 1a, and the coolant robs heat from the air on the periphery and is evaporated. When absorbing liquid is sent into an absorbing device 2 from the radiator 5 by a pump 7, said absorbing liquid is jetted-out from a plurality of nozzles 2a, and the evaporated coolant is absorbed into the absorbing liquid. Since the cooled air on the periphery of the evaporator 1 circulates in a car interior, when a fan 8 is driven, the car interior is cooled, and the absorbing liquid which absorbs coolant is sent into a regenerator 3, where the absorbing liquid and the coolant are separated, and the coolant is sent in gaseous state into the condenser 4, and the absorbing liquid is sent into the radiator 5. Since the pumps 6 and 7 and the fans 8 and 9 are driven by solar batteries 10, use of an engine and batteries can be obviated.

Description

[Detailed description of the invention] [Technical field of invention] The present invention relates to a cooling device for an automobile.

[Prior art]

Conventional air conditioning systems for automobiles include a compressor driven by the rotation of the engine, which compresses and liquefies refrigerant such as fluorocarbons, and evaporates the liquefied refrigerant in an evaporator installed in the air duct. There is a known structure that cools the air passing through the ventilation duct and cools the inside of the car.The heat released when the refrigerant evaporates and the heat obtained when compressed by the compressor are radiated by the radiator. The radiator was cooled by turning a fan using engine rotation or battery power.

However, when the compressor, etc. is operated while the engine is running, the compressor and radiator cooling fans do not operate when the car is stopped, so if the car is parked outdoors in the hot sun, the car may The temperature inside the car sometimes exceeded 50°C, which was a serious problem.

It is possible to cool the inside of a car by parking the car with the engine running, but in this case, there is a lot of waste of fuel and it is not desirable from a safety point of view.

It is also possible to use a battery to drive the compressor electrically, but in this case a large capacity battery would be required, and current batteries with a capacity of several tens of ampere hours would over-discharge in a short period of time. Then,
It becomes impossible to start the engine.

[Summary of the invention]

The present invention has been made in view of the above-mentioned points, and an object of the present invention is to provide an automobile cooling system that can independently and inexpensively cool the inside of a car without using an engine drive or a battery. After the refrigerant vaporized in the refrigerant is absorbed by the absorption liquid in the absorber, the absorption liquid and refrigerant are separated in the regenerator and sent to the radiator and condenser.
It is characterized by a pair of pumps operated by solar cells that circulate condensed and liquefied refrigerant to the evaporator and cooled absorption liquid to the absorber.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be described in detail based on the drawings.

As shown in the drawings, the automobile cooling device according to the present invention has the following features:
An evaporator 1 installed on the ceiling inside the car, an absorber 2 communicating with the evaporator 1 and containing an absorption liquid, and a regenerator communicating with the absorber 2 with a part protruding outside the car. 3, and is connected to this regenerator 3 via a pipe 3a,
It includes a condenser 4 arranged at the rear of the seat, and a radiator 5 connected to the regenerator 3 via a pipe 3b and arranged near the condenser 4. The condenser 4 is connected to the evaporator l via a pump 6 for circulating the liquefied refrigerant, and the radiator 5 is connected to the absorber 2 via another pump 7 for circulating the cooled absorption liquid. . Fans 8 and 9 for blowing air to the evaporator 1 and condenser 4 are arranged at opposing positions, respectively, and pumps 6 and 7 are provided on the evaporator 1 and absorber 2 outside the vehicle. A solar cell 10 is installed which generates electrical power to drive the fan 8.9. Note that 11 is a switch for driving a pump and a fan.

Next, the operation of the cooling device according to the present invention will be explained.

First, as the refrigerant, for example, water is used, which has a large latent heat of vaporization, is easily absorbed by the absorption liquid, and is easily separated by heating. In this case, the absorption liquid to be used is preferably lithium bromide.

When liquefied refrigerant is fed into the evaporator l from the condenser 4 by the pump 6, this refrigerant is atomized into a mist by a plurality of nozzles la provided in the evaporator l, absorbs heat from the surrounding air, and evaporates. and vaporizes.

In this case, if the evaporator l is formed flat so that its surface area is large, heat absorption of the refrigerant can be promoted. On the other hand, when the absorbent liquid is fed into the absorber 2 from the radiator 5 by the pump 7, this absorbent liquid is similarly sprayed by the plurality of nozzles 2a in the absorber 2. Therefore, the vaporized refrigerant is absorbed into this absorption liquid. As the refrigerant absorption by the absorption liquid progresses, the vapor pressure of the refrigerant decreases, so the refrigerant evaporates more easily and the amount of heat taken from the surroundings increases.

Therefore, when the fan 8 is driven, the cooled air around the evaporator 1 circulates inside the vehicle, thereby cooling the interior of the vehicle.

The absorption liquid that has absorbed the refrigerant is then sent to the regenerator 3. Since the regenerator 3 is heated by solar heat, the absorption liquid and refrigerant are separated, the cold liquid is sent to the condenser 4 in a vaporized state, and the absorption liquid is sent to the radiator 5. Since the refrigerant sent to the condenser 4 is condensed and liquefied, the vapor pressure within the condenser 4 decreases. Therefore, the refrigerant separated in the regenerator 3 is automatically sucked into the condenser 4. Also,
The vapor pressure of the refrigerant in the regenerator 3 also decreases, so
Refrigerant evaporation is accelerated. The liquefied refrigerant is pumped up by the pump 6 and sent to the evaporator 1 again, and the above-mentioned circulation is repeated. On the other hand, the absorption liquid separated in the regenerator 3 and sent into the radiator 5 is cooled by cold air from the fan 9, and returned to the absorber 2 by the pump 7, repeating the above-mentioned circulation.

The power for driving the pump 6.7 and the fan 8.9 is supplied by a solar cell 1O mounted outside the vehicle. That is, solar energy is about IKW per lrn' in midsummer, and if the efficiency of the solar cell 10 is 10%, 100 W of power can be obtained per tm'. Especially when parking under the hot summer sun, the sun's rays are strong and sufficient solar energy can be obtained.

And in pumps 6, -7 and fans 8.9,
Since it is used only for circulating the refrigerant and absorption liquid and for blowing air, the power consumption is also low. Therefore, if this energy is used to generate electricity from the solar cell IO and the power from the solar cell IO is used to drive the pump 6.7 and fan 8.9, the heat inside the car can be heated without driving the engine or using the battery. can be discharged outside the vehicle.

In the above embodiment, the same effect can be obtained by disposing the condenser 4 and the radiator 5 in another location where the temperature is maintained at a relatively low temperature, for example, under the trunk.

Further, it is preferable to form the condenser 4 flat in order to increase the area of contact with the air.

When the switch 11 is turned off, the pumps 6, 7 are stopped, and the refrigerant is no longer supplied to the evaporator 1 and the absorption liquid is no longer supplied to the absorber 2, so that the cooling operation ends. In addition, if the switch 11 is linked with the air conditioner switch on the dash board, it can be operated in parallel with the air conditioner, and if the switch 11 is switched to charge the power from the solar battery IO,
The power can be used for other purposes and is therefore economical.

〔Effect of the invention〕

As explained above, according to the present invention, the refrigerant vaporized in the evaporator is absorbed into the absorption liquid of the absorber, these are separated in the regenerator operated by solar heat, and the vaporized refrigerant is sent to the condenser. The liquid is liquefied, the absorption liquid is sent to a radiator to cool it, and the refrigerant and absorption liquid are returned to the evaporator and absorber, respectively, using a pump operated by solar cells, making it possible to use engine drive or battery power. The heat inside the car can be exhausted to the outside of the car at all times to cool the inside of the car. Therefore, it is possible to provide a cooling device that can safely and economically cool the interior of a vehicle even when the vehicle is parked under the scorching sun.

[Brief explanation of the drawing]

The drawing is an overall configuration diagram of a cooling device according to the present invention. 1---1 evaporator, 2---1---absorber, 3---
1--Regenerator, 3a, 3b--Pipe, 4--
---1 condenser, 5-----1 radiator, 6.7--
-bonp, 8.9-1---fan, l 0---m
-Solar cell, 11------- switch. Agent Masuo Oiwa

Claims (1)

[Claims] 1. An evaporator that is placed inside the vehicle and evaporates and vaporizes the refrigerant;
an absorber communicated with the evaporator and containing an absorption liquid that absorbs the vaporized refrigerant; and an absorber that is partially located outside the vehicle and communicated with the absorber, and receives solar heat to vaporize the refrigerant from the absorption liquid. a regenerator that separates the refrigerant from the regenerator, a condenser that liquefies the vaporized refrigerant sent from the regenerator, a radiator that cools the absorption liquid sent from the regenerator, and a liquefied coolant from the condenser that liquefies the refrigerant. A pump that circulates to the evaporator, another pump that circulates the absorption liquid cooled by the radiator to the absorber, and a solar cell that is installed outside the vehicle and supplies power to both pumps for operation. An automobile cooling device characterized by comprising: