KR101667627B1 - Air-conditioning system for vehicles using condensed water - Google Patents

Abstract

The present invention relates to a vehicle air conditioning system using condensed water for increasing the cooling efficiency by using condensed water. The present invention is characterized in that the compressor (10), the condenser (20), the expansion valve (30) and the evaporator (40) are constituted by a single closed circuit and the air flowing into the interior of the vehicle through heat exchange between the refrigerant circulating in the closed circuit Wherein a condensate drain part (50) is formed in an air conditioning case (70) where the evaporator (40) is installed, in which condensed water generated when the evaporator (40) is operated is collected and drained, The first refrigerant passage 60 connecting the refrigerant passage 20 and the expansion valve 30 passes through the condensate drain portion 50. Accordingly, the energy abandoned by the condensed water is recycled to form the subcooling region, so that the cooling ability can be easily improved without forming the dual pipe heat exchanger, thereby simplifying the structure of the air conditioning system and reducing the production cost .

Description

TECHNICAL FIELD [0001] The present invention relates to an air-conditioning system for a vehicle using condensate,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle air conditioning system, and more particularly, to a vehicle air conditioning system using condensed water for increasing cooling efficiency by using condensed water.

2. Description of the Related Art Generally, a cooling system for an automotive vehicle generally compresses a refrigerant by a compressor driven by an engine, sends it to a condenser, condenses a refrigerant by forced blowing of a cooling fan in a condenser, Exchanges heat between the air blown by the blower unit installed at the inlet end of the air conditioning case and the refrigerant passing through the evaporator, and discharges the blown air in the cold state to the interior of the vehicle Thereby cooling the interior of the vehicle.

In addition, in the vehicle cooling system, a dual-pipe heat exchanger for exchanging heat between the high-pressure and high-temperature refrigerant at the outlet of the condenser and the low-temperature and low-pressure refrigerant at the outlet of the evaporator may be installed in order to improve heat exchange efficiency.

1 is a view illustrating a conventional cooling system for a vehicle using a dual pipe heat exchanger.

As shown in the figure, a cooling system for a vehicle includes a compressor 1 driven by a driving force of an engine, a condenser 2 condensing the refrigerant compressed in the compressor 1, a condenser 2 condensed in the condenser 2, An evaporator 4 for evaporating the refrigerant flowing in from the expansion valve 3 and a refrigerant at the outlet of the condenser 2 and a refrigerant at the outlet of the evaporator 4 to each other, And a double pipe heat exchanger (5).

The double pipe heat exchanger 5 is composed of an inner pipe 5a connected to the outlet of the condenser 2 and an outer pipe 5b connected to the outlet of the evaporator 4. [

The refrigerant circulation process of the conventional refrigeration cycle for a vehicle constructed as described above will be described below.

When the cooling switch (not shown) of the vehicle air conditioner is turned on, the compressor 1 sucks and compresses the low-temperature and low-pressure gaseous refrigerant while being driven by the power of the engine and supplies the gaseous refrigerant to the condenser 2 And the condenser 2 heat-exchanges the gaseous refrigerant with the outside air to condense it into a high-temperature, high-pressure liquid.

The liquid refrigerant discharged from the condenser 2 in a high-temperature and high-pressure state rapidly expands due to the throttling action of the expansion valve 3 and is sent to the evaporator 4 in a low-temperature low-pressure humidified state. The blower (not shown) exchanges the refrigerant with the air blowing into the vehicle interior.

The high temperature and high pressure refrigerant at the outlet of the condenser 2 flows to the inner tube 5a of the dual pipe heat exchanger 5 and the low temperature and low pressure refrigerant at the outlet of the evaporator 4 flows into the double pipe heat exchanger 5 And the heat exchanging efficiency can be improved by exchanging heat with the outer tube 5b.

However, in the conventional air-conditioning system using a dual-pipe heat exchanger having the above-described configuration, the dual-pipe heat exchanger needs to be structured to have a complicated structure and an increased production cost. In addition, There is a problem that trade-off occurs in the system in terms of utilizing it as a service.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a vehicle air conditioning system using condensed water which can easily improve a cooling capability without forming a dual pipe heat exchanger.

It is still another object of the present invention to provide a vehicle air conditioning system using condensed water which does not use the input side of the compressor as a cooling source and thus does not cause the occurrence of a tray-off.

In order to achieve the above object, the present invention provides a vehicular air conditioning system comprising a compressor, a condenser, an expansion valve, and an evaporator as one closed circuit, and cooling air flowing into a room of the vehicle through heat exchange between refrigerant circulating in the closed circuit and air Wherein a drain portion through which condensed water generated in operation of the evaporator is collected and drained is formed in an air conditioning case in which the evaporator is installed and a first refrigerant flow path connecting the condenser and the expansion valve is passed through the drain portion, Thereby supercooling the refrigerant flowing into the valve.

Wherein a flange is provided in one side wall of the air conditioning case, the flange being passed through the first refrigerant passage, a second refrigerant passage connecting the evaporator and the compressor, and a third refrigerant passage connecting the expansion valve and the evaporator, The expansion valve is provided on the outer side.

The first refrigerant passage is bypassed without passing through the expansion valve but the refrigerant is not throttled.

And a drain plug for opening and closing the condensed water drain portion is provided on the condensed water drain portion by an opening / closing auxiliary means having elasticity.

According to the vehicle air conditioning system using the condensed water according to the present invention, the energy abandoned by the condensed water is recycled to form the subcooling region, so that the cooling ability can be easily improved without constructing the dual pipe heat exchanger. The structure is simplified, and the production cost can be reduced.

Further, since the input side of the compressor is not used as the cooling source, it is possible to prevent the occurrence of the tray-off in the system unlike the prior art.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram illustrating a cooling system for a vehicle using a dual-pipe heat exchanger according to a related art; FIG.
BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a cooling system for an automotive air conditioning system using condensed water.
3 is a configuration diagram specifically showing a relationship between the evaporator and the expansion valve of Fig. 2; Fig.
4 is a Mollier diagram showing a cooling system of a vehicle air conditioning system using condensed water according to an embodiment of the present invention.

Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings.

2 is a block diagram schematically showing a cooling system of a vehicle air conditioning system using condensed water according to an embodiment of the present invention.

A cooling system of a vehicle air conditioning system using condensed water according to an embodiment of the present invention includes a compressor 10, a condenser 20, an expansion valve 30, an evaporator 40, and a condensate drain portion 50.

The compressor (10) sucks discharged gas refrigerant after evaporation from the evaporator (40) is completed, compresses it into a gas refrigerant of high temperature and high pressure which is liable to be liquefied, and discharges it to the condenser (20). The compressor (10) is driven by receiving the driving force of the engine.

The condenser 20 functions to cool the high-temperature and high-pressure refrigerant gas introduced from the compressor 10 by using a cooling fan, and to liquefy the refrigerant. As the refrigerant gas flows through the tube, heat is released to the outside air, and heat is released to the air passing between the pins.

The expansion valve (30) throttles the condensed refrigerant in the condenser (20). The expansion valve (30) changes the liquid refrigerant transferred from the condenser (20) through a throttling action into a low-temperature low-pressure humidified state.

The condensate drain part 50 collects the condensed water generated on the surface of the evaporator 40 in the process of heat exchange between the refrigerant flowing in the evaporator 40 and the outside air during the operation of the evaporator 40 and drains the condensed water to the outside. The first refrigerant passage (60) connecting the condenser (20) and the expansion valve (30) passes through the condensate drain portion (50).

The refrigerant circulation process of the air conditioning system for a vehicle using condensed water according to an embodiment of the present invention will now be described.

When the cooling switch (not shown) of the air conditioning system of the vehicle is turned on, the compressor 10 sucks and compresses the low-temperature and low-pressure gaseous refrigerant while being driven by the power of the engine and supplies the gaseous refrigerant to the condenser 20 And the condenser 20 heat-exchanges the gaseous refrigerant with the outside air to condense into a high-temperature, high-pressure liquid.

The liquid refrigerant discharged from the condenser 20 in a high-temperature and high-pressure state is subcooled while passing through the condensate drain portion 50 before being transferred to the expansion valve 30. The subcooled liquid refrigerant expands rapidly due to the throttling action of the expansion valve 30 and is sent to the evaporator 40 in a low-temperature low-pressure humidified state, and the evaporator 40 blows the refrigerant to a vehicle interior Heat exchange with air blowing.

FIG. 3 is a block diagram specifically showing the relationship between the evaporator and the expansion valve of FIG. 2;

The evaporator 40 is installed in the air conditioning case 70 and the condensed water drain portion 50 in which condensed water generated in operation of the evaporator 40 is drained is formed below the air conditioning case 70. A drain plug (52) is provided in the condensate drain portion (50) together with an opening / closing auxiliary means (54). The opening and closing assisting means 54 includes a spring having elasticity. When the drain plug 52 closes the condensed-water drain portion 50, the condensed-water drain portion 50 may be filled with condensed water. When the condensed water amount accumulated in the condensed water drain portion 20 exceeds the elasticity of the spring, the drain plug 52 can open the condensed water drain portion 50 to keep the condensed water amount accumulated in the condensed water drain portion 20 constant.

A first refrigerant passage 60 for connecting the condenser 20 and the expansion valve 30 to the side wall of the air conditioning case 70, a second refrigerant passage 80 for connecting the evaporator 40 and the compressor 10, And a flange 100 through which the third refrigerant passage 90 connecting the expansion valve 30 and the evaporator 40 pass.

The expansion valve (30) is installed outside the flange (100).

The first refrigerant passage 60 passes through the expansion valve 30 without bypassing the refrigerant and is bypassed in the air conditioning case 70. The refrigerant passes through the condensate drain portion 50, So that the refrigerant is cooled.

4 is a Mollier diagram showing a cooling system of a vehicle air conditioning system using condensed water according to an embodiment of the present invention.

As shown, the vertical axis represents pressure P and the horizontal axis represents enthalpy h. The refrigerant in the region on the left side of the liquid phase shows a liquid state, the refrigerant in the region on the right side of the gaseous phase indicates a gaseous state, and the refrigerant in the region between the liquidus line and the gaseous phase indicates a two- .

The bc process is a process in which the high-temperature and high-pressure refrigerant is cooled in the condenser 20, and the cd process is a process in which the cooled refrigerant is cooled in the condenser 20. The abc process is a compression process in which the refrigerant is compressed at a high temperature and a high pressure in the compressor 10, Is a throttling process in which the refrigerant is throttled to a low temperature and a low pressure by an expansion valve (30), and a da process is an evaporation process in which the throttled refrigerant is evaporated by the evaporator (40).

In the above, the enthalpy difference from the point d to the point a corresponds to the amount of heat acting on the cooling, and the larger the enthalpy difference is, the larger the cooling capacity becomes.

When the refrigerant conveyed from the condenser 20 to the expansion valve 30 through the first refrigerant passage 60 passes through the condensate drain portion 50, c moves to the point c1 and d moves to the point d1 . That is, from the point c to the point c1, the supercooling area is promoted.

Therefore, the cooling capability is improved by the supercooling region (point d1 at point d).

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, have.

10: compressor 20: condenser
30: expansion valve 40: evaporator
50: Condensate drain part 52: Drain plug
54: opening / closing assist means 60: first refrigerant passage
70: air conditioning case 80: second refrigerant passage
90: Third refrigerant passage 100: Flange

Claims (4)

A refrigeration system for a vehicle which comprises a compressor (10), a condenser (20), an expansion valve (30) and an evaporator (40) as one closed circuit and cools the air flowing into the room through heat exchange between the refrigerant circulating in the closed circuit In an air conditioning system,
The condensing water drain part 50 is formed in the air conditioning case 70 where the evaporator 40 is installed and the condensed water generated when the evaporator 40 is operated is drained. The condenser 20 and the expansion valve 30 ) Passes through the condensate drain portion (50), and the first refrigerant passage
A second refrigerant passage 80 connecting the evaporator 40 and the compressor 10 to the first refrigerant passage 60 and a second refrigerant passage 80 connecting the expansion valve 30 and the evaporator 40, The expansion valve 30 is installed on the outer side of the flange 100, and the expansion valve 30 is installed on the outer side of the flange 100,
Wherein the first refrigerant passage (60) passes through the expansion valve (30) and the refrigerant is bypassed without being throttled.
delete delete The method according to claim 1,
Wherein a drain plug (52) for opening and closing the condensed water drain portion (50) is provided to the condensate drain portion (50) by an opening / closing auxiliary means (54) having elasticity.

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