KR20080025991A - Air conditioning system for a automotive vehicles - Google Patents

Abstract

An air conditioning system for a vehicle is provided to quickly heat the inside of the vehicle during an initial ignition by using high-temperature refrigerant which is separated from bypassed refrigerant of a compressor. An air conditioning system for a vehicle comprises a compressor(10), a condenser(20) and a bypass valve(50) through which refrigerant of the compressor is bypassed during a heating mode. A vortex tube(30) divides the bypassed refrigerant into high-temperature refrigerant and low-temperature refrigerant, and discharges them to a high-temperature outlet(34) and a low-temperature outlet(36), respectively, during the heating mode. An opening/closing valve(60) opens the low-temperature outlet during the heating mode. A return line(62) returns the low-temperature refrigerant to an inlet side of the compressor. An evaporator(40) generates hot air to heat the inside of the vehicle.

Description

AIR CONDITIONING SYSTEM FOR A AUTOMOTIVE VEHICLES}

1 and 2 schematically show a conventional vehicle air conditioning system,

3 is a view showing the configuration of a vehicle air conditioning system according to the present invention, showing a cooling mode state,

Figure 4a is a cross-sectional view showing a vortex tube constituting the air conditioning system of the present invention, showing a cooling mode state,

4B is a cross-sectional view taken along line A-A of FIG. 4A showing the high temperature outlet and the control valve of the vortex tube;

Figure 4c is a cross-sectional view showing a state in which the control valve of the vortex tube moved in the direction of reducing the cross-sectional area of the high temperature outlet,

4D is a cross-sectional view taken along the line B-B of FIG. 4C;

5 is a view showing the configuration of a vehicle air conditioning system according to the present invention, a view showing a heating mode state,

6 is a cross-sectional view showing a vortex tube constituting the air conditioning system of the present invention, showing a heating mode state;

7 is a view showing another embodiment of a vehicle air conditioning system according to the present invention.

♣ Explanation of symbols for main part of drawing ♣

10: compressor 20: condenser

30: Vortex Tube 32: Inlet

34: high temperature outlet 36: low temperature outlet

38: control valve 40: evaporator

50: Bypass Valve 52: Bypass Line

54: air conditioning switch 60: on-off valve

62: Return Line 70: Mixing Device

80: expansion valve

The present invention relates to a vehicle air conditioning system, and more particularly, to a vehicle air conditioning system that can heat the interior of a vehicle even when the vehicle is initially driven, and can initially heat the interior of the vehicle without energy consumption.

The car is equipped with an air conditioning system for cooling and heating the room. This air conditioning system has a compressor 1, a condenser 3, an expansion valve 5 and an evaporator 7, as shown in FIG.

The compressor 1 compresses the vaporized refrigerant into a gas of high temperature and high pressure, the condenser 3 liquefies the refrigerant of high temperature and high pressure, and the expansion valve 5 expands the liquefied refrigerant to low temperature and low pressure. Then, the evaporator 7 introduces the expanded low-temperature and low-pressure refrigerant and heat-exchanges with the surrounding air. In particular, the evaporator 7 heats the low-temperature and low-pressure refrigerant with the surrounding air, thereby generating cold air and supplying the generated cold air to the interior of the vehicle to cool the interior of the vehicle.

The air conditioning system includes a heater core 8. The heater core 8 has a tube (not shown) through which high-temperature engine coolant can flow, and after introducing high-temperature engine coolant, heat is generated by heat exchange with surrounding air to generate heat, and It supplies to the room and heats the inside of the vehicle.

However, such a conventional air conditioning system has a disadvantage in that at the initial stage of engine start-up, cooling water that is not sufficiently heated is supplied to the heater core 8, and thus the heater core 8 does not heat air supplied to the room. Therefore, there is a problem in that the heating effect of the room cannot be expected at the initial stage of starting the vehicle.

On the other hand, as an example of a solution for solving this, "air conditioner" of Japanese Patent Laid-Open No. 5-223357 has been proposed. As shown in FIG. 2, the technique bypasses the high temperature / high pressure refrigerant discharged from the compressor 1 to the bypass line 9, and then introduces the bypassed refrigerant directly into the evaporator 7. to be.

Such an air conditioning apparatus directly bypasses the refrigerant discharged from the compressor 1 to the evaporator 7, whereby the bypassed refrigerant passes through the evaporator 7 to generate heat, and the generated heat passes into the interior of the vehicle. Initially heats the interior of the vehicle as it is supplied. However, such a conventional air conditioner is required to provide a separate pressure reducing device (9a) in order to reduce the pressure of the bypassed high temperature and high pressure refrigerant, so that the evaporator (7) due to the installed pressure reducing device (9a) There is a problem that the temperature of the refrigerant to be introduced is lowered. In particular, since the temperature of the refrigerant introduced into the evaporator 7 is lowered, the heating efficiency in the evaporator 7 is very low, and the heating efficiency in the evaporator 7 is very low, so that a sufficient initial heating effect cannot be expected. have.

On the other hand, as another example for the initial heating, a technique for installing a separate auxiliary heating device, for example, a PTC heater, a combustion heater and the like has been proposed.

However, such a technology has a problem in that the size of the auxiliary heating apparatus to be installed is large and the structure is complicated, requiring a large installation space and a large installation cost. In addition, it is pointed out that additional fuel, electricity is required to drive the auxiliary heating device, so that energy consumption is high.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and an object thereof is to provide a vehicle air conditioning system capable of heating the interior of a vehicle even when the vehicle is initially started.

Another object of the present invention is to provide a vehicle air conditioning system capable of initially heating the interior of a vehicle without energy consumption.

In order to achieve this object, the present invention provides a compressor for compressing a refrigerant; A condenser for liquefying refrigerant introduced from the compressor; A bypass valve for allowing refrigerant flow from the compressor to the condenser in the cooling mode, and bypassing the refrigerant in the compressor in the heating mode; In the cooling mode, the refrigerant introduced from the condenser is decompressed and expanded to be discharged to the high temperature outlet. In the heating mode, the refrigerant bypassed by the bypass valve is separated into a high temperature coolant and a low temperature coolant, respectively. A vortex tube for discharging; In the cooling mode, the low-temperature outlet is blocked so that the vortex tube can decompress and expand the refrigerant introduced from the condenser. In the heating mode, the vortex tube bypasses the refrigerant bypassed by the bypass valve. An on / off valve for opening the low temperature outlet so as to be separated into a refrigerant; A return line for returning the low temperature refrigerant discharged from the low temperature outlet of the vortex tube to the inlet side of the compressor in the heating mode; When the refrigerant decompressed and expanded from the high temperature outlet of the vortex tube is introduced, cool air is generated to cool the interior of the vehicle, and when a high temperature refrigerant is introduced from the high temperature outlet of the vortex tube, heat is generated to heat the interior of the vehicle. It characterized in that it comprises an evaporator.

Preferably, the apparatus may further include a mixing device for mixing the low temperature refrigerant transferred from the return line and the refrigerant transferred from the evaporator and introducing the same into the compressor.

And an expansion valve disposed between the condenser and the vortex tube so as to decompress and expand the refrigerant discharged from the condenser at low temperature and low pressure in the cooling mode.

Hereinafter, a preferred embodiment of a vehicle air conditioning system according to the present invention will be described in detail with reference to the accompanying drawings.

First, referring to FIG. 3, the air conditioning system of the present invention includes a compressor 10 and a condenser 20. The compressor 10 compresses the vaporized refrigerant into a gas of high temperature and high pressure, and the condenser 20 liquefies the refrigerant of high temperature and high pressure.

In addition, the air conditioning system of the present invention includes a vortex tube 30 connected to the condenser 20. The vortex tube 30 has an inlet 32, a high temperature outlet 34 and a low temperature outlet 36, as shown in FIGS. 3 to 6.

The inlet 32 is connected to the condenser 20 and introduces a refrigerant discharged from the condenser 20.

The high temperature outlet 34 is provided with a conical control valve 38, which, when the low temperature outlet 36 side is cut off, from the inlet 32 as shown in FIG. 4A. After the pressure-reduced high pressure refrigerant is depressurized and expanded, it is discharged to the high temperature outlet 34. When the low temperature outlet 36 side is opened, as shown in FIG. 6, among the vortex refrigerants transferred from the inlet 32, the refrigerant having a low pressure in the center portion is returned to the low temperature outlet 36, and the pressure is reduced. The high circumferential refrigerant is discharged to the high temperature outlet 34. Therefore, mutual heat exchange may be performed between the refrigerant in the center and the refrigerant at the circumference, thereby allowing the refrigerant at the circumference to be discharged to the high temperature outlet 34 while maintaining the high temperature, and the refrigerant at the center at a low temperature outlet while maintaining the low temperature To (36).

According to the vortex tube 30 having such a configuration, when the low temperature outlet 36 side is blocked, it performs an expansion valve role of decompressing and expanding the introduced refrigerant and then discharges it, and when the low temperature outlet 36 side is opened, it is introduced. Separate the refrigerant into a high temperature refrigerant and a low temperature refrigerant to serve to discharge.

On the other hand, the control valve 38, as shown in Figures 4a and 4c, is provided to be movable inside the vortex tube 30 by a moving means (not shown). In particular, the position is adjusted as it is movable inside the vortex tube 30, and is configured to variably adjust the cross-sectional area of the hot outlet 34 as the position is adjusted.

4B and 4D, by varying the cross-sectional area of the high-temperature outlet 34, the refrigerant passing through the high-temperature outlet 34 to fit the conditions in the heating mode or the cooling mode is throttled. To expand / separate or separate into hot / cold refrigerants.

Here, the moving means for moving the control valve 38 may be composed of a solenoid (Solenoid) device or a mechanical device.

Referring again to FIG. 3, the air conditioning system of the present invention includes an evaporator 40 connected to the high temperature outlet 34 of the vortex tube 30.

When the low-temperature / low-pressure refrigerant decompressed and expanded from the high-temperature outlet 34 of the vortex tube 30 is introduced into the evaporator 40, the evaporator 40 takes away the surrounding heat to generate cold air, and the high-temperature outlet 34 of the vortex tube 30. When a high temperature coolant flows in from), the surrounding cool air is taken away to generate heat.

Therefore, when the low-temperature and low-pressure refrigerant introduced from the vortex tube 30 flows in, the cool air is generated to cool the interior of the vehicle, and when the high-temperature refrigerant flows from the vortex tube 30, heat is generated to generate the vehicle. Heats the room early.

On the other hand, the evaporator 40 is connected to the compressor 10, and of course introduces the refrigerant passing through the compressor 10.

Referring again to FIG. 3, the air conditioning system of the present invention includes a bypass valve 50 for bypassing the high temperature and high pressure gas refrigerant discharged from the compressor 10, and a bypassed high temperature and high pressure gas refrigerant. The bypass line 52 is introduced into the inlet 32 of the vortex tube 30.

The bypass valve 50 is a solenoid valve. When the air-conditioning switching switch 54 is operated from the "cooling mode" to the "heating mode", the bypass valve 50 switches to the operation position to supply the high-temperature and high-pressure gas refrigerant discharged from the compressor 10. Bypassing and operating the air-conditioning switching switch 54 from the "heating mode" to the "cooling mode", the high-temperature and high-pressure gas refrigerant discharged from the compressor 10 is introduced into the condenser 20 while returning to the recovery position. .

The bypass line 52 introduces a high-temperature, high-pressure gas refrigerant bypassed by the bypass valve 50 into the inlet 32 of the vortex tube 30, and the vortex in the "heating mode". The tube 30 allows the high temperature and high pressure gas refrigerant to be separated into a high temperature refrigerant and a low temperature refrigerant.

Referring again to FIG. 3, the air conditioning system of the present invention includes an on / off valve 60 that opens and closes the low temperature exit 36 side of the vortex tube 30.

The on-off valve 60 is a normally closed solenoid valve that normally closes the low temperature outlet 36 side of the vortex tube 30. The air-conditioning switching switch 54 is changed from the "cooling mode" to the "heating mode". When operating in, the vortex tube 30 is opened from the bypass valve 50 by opening the low temperature outlet 36 side of the vortex tube 30 and opening the low temperature outlet 36 side while being switched to the operating position. The bypassed high temperature and high pressure gas refrigerant can be separated into a high temperature refrigerant and a low temperature refrigerant.

On the contrary, when the cooling / heating switching switch 54 is operated from the "heating mode" to the "cooling mode", the low temperature exit 36 side of the vortex tube 30 is blocked while returning to the original position, and the low temperature exit 36 side is turned off. By blocking, the vortex tube 30 can discharge the high pressure refrigerant introduced from the condenser 20 after decompressing and expanding.

Meanwhile, the low temperature refrigerant discharged from the low temperature outlet 36 is introduced to the inlet side of the compressor 10 through the return line 62, and the refrigerant introduced to the inlet side merges with the refrigerant transferred from the evaporator 40. 10) is introduced into the interior.

Here, the mixing device 70 is installed at the confluence point of the refrigerant transferred from the low temperature outlet 36 and the refrigerant transferred from the evaporator 40. The mixing apparatus 70 has an internal mixing space (not shown) and mixes the low temperature refrigerant transferred from the low temperature outlet 36 and the high temperature refrigerant transferred from the evaporator 40.

Next, an operation example of the present invention having such a configuration will be described with reference to FIGS. 3 to 6. First, the "cooling mode" state will be described with reference to FIGS. 3 and 4.

The cooling / heating changeover switch 54 is operated in the "cooling mode". Then, the high temperature and high pressure refrigerant discharged from the compressor 10 is introduced into the condenser 20, and the high temperature and high pressure refrigerant introduced into the condenser 20 is liquefied and introduced into the inlet 32 of the vortex tube 30. Is introduced.

On the other hand, since the refrigerant introduced into the inlet 32 is in a state where the low temperature outlet 36 is blocked, the refrigerant introduced into the high temperature outlet 34 and the refrigerant introduced into the high temperature outlet 34 are supplied to the control valve 38. It introduce | transduces into the evaporator 40, decompressing and expanding by this.

The refrigerant introduced into the evaporator 40 is vaporized while passing through the internal passage of the evaporator 40, and the vaporized refrigerant deprives surrounding heat to generate cold air. Cool the room.

On the other hand, the refrigerant passing through the evaporator 40 is compressed into a refrigerant having a high temperature and high pressure while being introduced into the compressor 10 again.

Next, the "heating mode" state will be described with reference to FIGS. 5 and 6. First, the air-conditioning changeover switch 54 is operated in "heating mode." Then, the bypass valve 50 and the open / close valve 60 are switched, respectively, and the bypass valve 50 and the open / close valve 60 to be switched bypass the refrigerant of the compressor 10 and the vortex tube 30. The low temperature exit 36 side of the side is opened.

Meanwhile, the refrigerant bypassed from the bypass valve 50 is introduced into the inlet 32 of the vortex tube 30 through the bypass line 52, and the introduced refrigerant is heated at a high temperature by the control valve 38. The refrigerant and the low temperature refrigerant are separated into the high temperature outlet 34 and the low temperature outlet 36.

Here, the vortex tube 30 serves to further increase the temperature of the high temperature refrigerant once more in the process of separating the high temperature / high pressure gas refrigerant heated once in the compressor 10 into a high temperature refrigerant and a low temperature refrigerant. Therefore, the hot refrigerant discharged through the hot outlet 34 is maintained at a very high temperature. According to the test results, the temperature of the refrigerant heated in the compressor 10 was 60 ° C, and the temperature of the high temperature refrigerant separated by the vortex tube 30 was maintained at 70 ° C higher than that.

Meanwhile, the high temperature refrigerant discharged to the high temperature outlet 34 is introduced into the evaporator 40, and the introduced high temperature refrigerant takes heat from surrounding air while passing through the evaporator 40 to generate heat, and the generated heat is generated by the vehicle. Initially heats the vehicle's interior while being supplied indoors.

The low temperature refrigerant discharged to the low temperature outlet 36 is introduced to the inlet side of the compressor 10 through the return line 62, and the refrigerant introduced to the inlet side is mixed with the refrigerant transferred from the evaporator 40, and then again the compressor ( 10) is introduced into the interior.

Next, FIG. 7 is a view showing another embodiment of the air conditioning system according to the present invention. The air conditioning system of another embodiment has a configuration in which an expansion valve 80 is provided between the condenser 20 and the vortex tube 30. The rest of the configuration is the same as that of the above-described embodiment.

The expansion valve 80 serves to depressurize and expand the refrigerant discharged from the condenser 20 at low temperature and low pressure in the "cooling mode". At this time, the control valve 38 provided at the high temperature outlet 34 of the vortex tube 30 completely opens the high temperature outlet 34 to stop the decompression / expansion.

The air conditioning system of this other embodiment increases the cooling efficiency in the evaporator 40 as much as possible by increasing the pressure reduction and expansion efficiency of the refrigerant discharged from the condenser 20 in the "cooling mode".

In the above described exemplary embodiments of the present invention by way of example, the scope of the present invention is not limited only to these specific embodiments, it can be changed appropriately within the scope described in the claims.

As described above, according to the vehicle air conditioning system according to the present invention,

 The gas refrigerant of the bypassed compressor is quickly separated into high temperature and low temperature refrigerant, and then the inside of the vehicle is heated by the separated high temperature refrigerant. Therefore, the interior of the vehicle can be quickly heated even when the vehicle is initially driven. It works.

In addition, the initial driving of the vehicle can quickly heat the interior of the vehicle without any energy consumption, thereby reducing the energy consumption to the maximum.

In addition, since the temperature of the high-temperature gas refrigerant heated once in the compressor is further increased, the structure is used for heating the room, thereby maximizing the initial heating efficiency of the room.

Claims (4)

A compressor 10 for compressing the refrigerant; A condenser (20) for liquefying refrigerant introduced from the compressor (10); A bypass valve (50) for allowing a refrigerant flow from the compressor (10) to the condenser (20) in the cooling mode, and bypassing the refrigerant of the compressor (10) in the heating mode; In the cooling mode, the refrigerant introduced from the condenser 20 is decompressed and expanded to be discharged to the high temperature outlet 34. In the heating mode, the refrigerant bypassed by the bypass valve 50 is converted into a high temperature refrigerant and a low temperature refrigerant. A vortex tube 30 separating and discharging the hot outlet 34 and the cold outlet 36, respectively; In the cooling mode, the vortex tube 30 blocks the low temperature outlet 36 so as to decompress and expand the refrigerant introduced from the condenser 20. In the heating mode, the vortex tube 30 is An on / off valve 60 for opening the low temperature outlet 36 to separate the refrigerant bypassed in the pass valve 50 into a high temperature refrigerant and a low temperature refrigerant; A return line 62 for returning the low temperature refrigerant discharged from the low temperature outlet 36 of the vortex tube 30 to the inlet side of the compressor 10 in the heating mode; When the refrigerant decompressed and expanded from the high temperature outlet 34 of the vortex tube 30 is introduced, cool air is generated to cool the interior of the vehicle, and when high temperature refrigerant is introduced from the high temperature outlet 34, heat is generated. Vehicle air conditioning system comprising an evaporator 40 for heating the interior of the vehicle. The method of claim 1, And a mixing device (70) for mixing the low temperature refrigerant transferred from the return line (62) and the refrigerant transferred from the evaporator (40) and introducing the refrigerant into the compressor (10). The method according to claim 1 or 2, Further comprising an expansion valve (80) provided between the condenser 20 and the vortex tube (30) to reduce the pressure and expand the refrigerant discharged from the condenser 20 at a low temperature, low pressure in the cooling mode. Vehicle air conditioning system characterized in that. The method according to claim 1 or 2, A control valve 38 is installed at the high temperature outlet 38 of the vortex tube 30, and the control valve 38 is installed to be movable inside the vortex tube 30 by a moving means. Vehicle air conditioning system, characterized in that the variable cross-sectional area of (34) can be adjusted.

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