SU1571367A1 - Vehicle air conditioning system - Google Patents

Abstract

The invention relates to air-conditioning devices in vehicle interiors and improves the reliability of the system. The air conditioning system includes a refrigeration machine 1 with the evaporator 3, the condenser 4, the absorber 5, the throttle valve 6, the pump 7 and the generator 8 successively placed in its circuit 2. The generator 8 communicates with the heat source 9 on the exhaust pipe 10 with an additional closed loop 11 ring thermosyphon. On the pipe 12 of the thermosyphon placed a regulating device 13 with a sensitive element 14. 2 Il.

Description

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The invention relates to the device-air conditioning in fat-nqx vehicles, in particular in the cabs of tractors and cars.

The purpose of the invention is to increase the reliability in the operation of the conditioning system by providing automatic control and increasing es-A (efficiency of heat transfer).

Fig. 1 shows a diagram of the proposed air conditioning system of ayxaj in Fig. 2 — an evaporator assembly of a two-phase thermosyphon and an exhaust pipe.

The vehicle air-conditioning system contains an absorptive refrigerating machine 1 with an evaporator 3 placed in circuit 2, a condenser 4, an absorber 5, a throttle valve 6, equipped between the evaporator 3 and a condenser 4, a pump 7 for transferring the working medium and generator 8, communicated with the source 9 of the heat on the exhaust pipe 10 of the vehicle.

The generator 8 is connected to the heat source 9 by an additional closed loop 11 in the form of an annular thermosyphon with pipelines 12 filled with a two-phase heat transfer medium. The thermosyphon is equipped with a regulating device 13 with a sensing element 14 on the steam pipe 12 and the heat source 9 itself is made in the form of a heat exchanger 15 pipe in a pipe whose inner pipe is an exhaust pipe 10. Vertically oriented capillary tubes 1 are fixed to the surface of the exhaust pipe 10 inside the thermosyphon 6. The generator 8 and the absorber 5 are connected by a pipe 17 through which a weak absorbent solution is supplied.

The vehicle air conditioning system works as follows.

In the source 9, the exhaust gases from the engine of the transport vehicle exhaust heat are heated in an additional closed circuit 11 to the heat transfer medium. Steam Laza heat transfer medium through the steam pipe 12 through the regulating device 13 enters the generator 8, where it condenses, transferring the heat of condensation to the working medium circulating in circuit 2. The working medium evaporates

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and its vapors enter the condenser 4, where the working medium is condensed and then directed through the throttle valve 6 to the evaporator 3. In the latter, the working medium is evaporated due to the heat of the air, which is cooled, is fed to the vehicle interior. From the evaporator 3, the working medium enters the absorber 5, where a weak absorbent solution also flows through line 17. The liquid absorbed by the vapor of the working medium is pumped out by the pump 7 to the generator 8, and then the cycle repeats.

The cooling mode of the vehicle cabin can be regulated by means of the regulating device 13. The regulation is carried out by changing the hydraulic resistance of the steam pipe 12, which leads to a change in the amount of heat supplied to the solution in the generator 8 of the absorption chiller 1.

The installation of the regulating device on the steam piping 12 is easy and reliable and allows for the stability of the system during variable engine operating conditions. In addition, there is a rapid heating of the heat transfer medium in the capillary tubes 16, fixed on the surface of the exhaust pipe 10, as a result of the formation of vapor bubbles that, rising through the capillary tubes, improve circulation and increase the heat transfer coefficient. The use of the proposed invention allows to increase the efficiency and reliability in the operation of the entire vehicle air conditioning system and to ensure the possibility of automatic control of its operating modes.

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Claims (1)

Invention Formula A vehicle air conditioning system containing an absorption chiller with an evaporator, a condenser, an absorber, a throttle valve installed between the evaporator and a condenser, a pump for pumping the working medium, and a generator communicated with a heat source on the exhaust pipe of the vehicle, located in the working medium circuit, 515 so that, in order to increase the reliability of its operation by providing automatic regulation of the increase in heat transfer efficiency, the generator is connected to the heat source with an additional closed loop in the form of an annular thermosyphon with pipelines filled with a two-phase heat transfer medium background is provided with a regulating device with a sensing element on the steam pipe, and the heat source is made in the form of a heat exchanger pipe in a pipe whose inner pipe is an exhaust pipe, while vertically oriented capillary tubes are fixed on the surface of the latter inside the thermosyphon. Compiled by E.Egorov Editor S.Lisina Tehred M.Morgental Order 1502 Circulation 59Ј VNIIPI State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, Zh-35, Raushsk nab. 4/5 .".".-.at.- --,- - -. - ---- - - -. - -. - - ---.-- “-. - - - - --- - - - - -. - - - -.---- -.-, Production and publishing plant Patent, Uzhgorod, st. Gagarin, 101 FIG. 2 Proofreader V.Kabatsiy Subscription