KR102053021B1 - Air conditioner for vehicles - Google Patents

Abstract

The present invention relates to an air conditioner for a vehicle, and more particularly, it is possible to cool and heat using a heat exchanger using a thermoelectric module on a console vent, and during cooling, a part of the refrigerant supplied to the evaporator flows to the high temperature part of the thermoelectric module It relates to a vehicle air conditioner that can effectively cool by increasing the cooling efficiency.

Description

Automotive air conditioning unit {AIR CONDITIONER FOR VEHICLES}

The present invention relates to an air conditioner for a vehicle, and more particularly, it is possible to cool and heat using a heat exchanger using a thermoelectric module on a console vent, and during cooling, a part of the refrigerant supplied to the evaporator flows to the high temperature part of the thermoelectric module. It relates to a vehicle air conditioner that can effectively cool by increasing the cooling efficiency.

In recent years, as the interest in the environment and energy in the vehicle industry is increasing, researches for improving fuel economy have been conducted, and research and development for light weight, miniaturization, and high functionalization have been steadily made to satisfy various consumer needs. In particular, in the vehicle air conditioning system, since it is difficult to secure sufficient space in the engine room, the vehicle air conditioner is required for the vehicle air conditioner that can effectively control the temperature and air volume while being compact.

In general, the vehicle air conditioner maintains the interior of the vehicle at an appropriate temperature in summer or winter, or removes the frost that is caught in the windshield of the vehicle in the rain or winter so that the driver's front and rear view can be secured.

1 is a cross-sectional view showing an example of a conventional vehicle air conditioner, a conventional air conditioner for a vehicle air conditioner (10, 13, 13, 13) is provided with vents 11, 12, 13 whose opening degree is adjusted by each door (11d, 12d, 13d) ), A blower 14 connected to an inlet of the air conditioning case 10 to blow outside air, an evaporator 20 provided in the air conditioning case 10, and a cold air passage of the air conditioning case 10. It is formed including a temporal door 15 for adjusting the opening degree of the P1) and the warmth passage (P2).

In the conventional vehicle air conditioner configured as described above, when the cooling cycle is operated, the temporal door 15 opens the cold air passage P1 and closes the warm air passage P2. Therefore, the air blown by the blower 14 is exchanged with the refrigerant flowing through the evaporator 20 while passing through the evaporator 20 to be changed to cold, and then vented and opened toward the cold air passage P1. Cooling of the vehicle interior is performed by being discharged to the vehicle interior through the 11, 12, 13).

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In addition, when the heating cycle is operated, the temporal door 15 closes the cold air passage P1 and at the same time, the air blown by opening the warm passage P2 is heated by the heater passage P2. Heat is exchanged with the coolant flowing through the inside of the heater core 30 while passing through the core 30 to be turned into warmth and discharged into the vehicle interior through the open vents 11, 12, 13 to perform heating of the vehicle interior. .

In this case, in order to reduce the temperature difference between the front and rear seats, a console vent for supplying air to a console box (not shown), which is a central area of the vehicle interior, may be further formed on the rear side of the floor vent.

The console vent is branched from the face vent and a part of the air introduced into the face vent is supplied to the rear seat side through the console vent.

However, the temperature may be changed while the cooled or heated air moves while passing through the evaporator or the heater core, so that an additional heat exchanger may be provided on the console vent.

In this case, since it is difficult to secure sufficient space, there is a demand for a vehicle air conditioner that can increase the air-conditioning efficiency of the front and rear seats in the vehicle interior while minimizing the temperature comfort of the passengers.

Republic of Korea Patent Publication 2010-0005509 (Invention name: vehicle air conditioner)

The present invention has been made to solve the problems described above, the object of the present invention can be cooled and heated using a heat exchanger using a thermoelectric module on the console vent, it is possible to downsize as a simple configuration, when cooling, Some of the refrigerant supplied to the evaporator flows to provide an air conditioner for a vehicle that can effectively cool the high temperature portion of the thermoelectric module to increase the cooling efficiency.

Particularly, in the vehicle air conditioner of the present invention, since the refrigerant is branched from the pipe between the condenser and the first expansion valve, and the pressure is controlled by the second expansion valve, the refrigerant is supplied to the heat exchanger. It is to provide a vehicle air conditioner that can increase the heat dissipation effect.

In the vehicle air conditioner 1000 of the present invention, a floor vent 110, a defrost vent 120, a face vent 130, and a console vent 140 having an opening degree controlled by doors 110d, 120d, and 130d are formed. Air conditioning case 100; In the vehicle air conditioning apparatus 1000 including an evaporator 200 provided inside the air conditioning case 100 to cool the air, the vehicle air conditioning apparatus 1000 may include some of the refrigerant supplied to the evaporator 200. A heat exchanger 700 including a thermoelectric module 742 that is movable and is provided on the console duct 500 connected to the console vent 140 and cools or heats the air is provided.

In addition, the heat exchanger 700 includes a first header tank 710 and a second header tank 720; A tube 741 having both ends fixed to the first header tank 710 and the second header tank 720, and a thermoelectric module whose temperature is controlled by voltages applied to both sides of the tube 741. 742 and a unit module 740 including a plurality of pins 743 provided on both sides of the thermoelectric module 742; It is characterized in that it comprises an inlet pipe 731 and the outlet pipe 732 is connected to the first header tank 710 or the second header tank 720, the refrigerant flows in.

At this time, the vehicle air conditioner 1000, the compressor 810, the condenser 820, the first expansion valve 830, and the evaporator 200 is connected by the first pipe 800, the refrigerant is circulated sequentially However, one end thereof is branched from the first pipe 800 connecting the condenser 820 and the first expansion valve 830, and the other end 2-1 pipe 901 is connected to the inlet pipe 731 ) And a second end pipe 902 connected to the outlet pipe 732 and the other end connected to the first pipe 800 connecting the evaporator 200 and the compressor 810. Characterized in that.

In addition, the vehicle air conditioner 1000 is further characterized in that the second expansion valve 910 is further provided on the front side of the heat exchanger 700 on the second-first pipe 901 in the refrigerant flow direction.

Accordingly, the vehicle air conditioner of the present invention can be cooled and heated by using a heat exchanger using a thermoelectric module on the console vent, and can be miniaturized as a simple configuration, and during cooling, some of the refrigerant supplied to the evaporator flows to the thermoelectric device. There is an advantage to increase the cooling efficiency by effectively cooling the high temperature of the module.

Particularly, in the vehicle air conditioner of the present invention, since the refrigerant is branched from the pipe between the condenser and the first expansion valve, the pressure is controlled by the second expansion valve, and the pressure is supplied to the heat exchanger. There is an advantage to increase the heat dissipation effect.

1 is a view showing a conventional vehicle air conditioner.
2 is a view showing a vehicle air conditioner according to the present invention.
3 is a view showing a refrigerant movement of the vehicle air conditioner according to the present invention.
4 and 5 are a perspective view and a cross-sectional view showing a heat exchanger of the vehicle air conditioner according to the present invention.
6 is a view for explaining the operation of the thermoelectric module.
7 and 8 is a view showing the heat exchanger operation of the vehicle air conditioner according to the present invention. (FIG. 7 is cooling, FIG. 8 is heating)

Hereinafter, with reference to the accompanying drawings a vehicle air conditioner 1000 of the present invention having the features as described above in detail.

2 is a view showing the vehicle air conditioner 1000 according to the present invention, Figure 3 is a view showing the refrigerant movement of the vehicle air conditioner 1000 according to the present invention. The vehicle air conditioner 1000 of the present invention includes an air conditioner case 100, an evaporator 200, and a heat exchanger 700. The air conditioning case 100 is a space for cooling and heating as air is introduced and moved, and vents 110, 120, 130, and 140 having openings controlled by the doors 110d, 120d, and 130d are formed.

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The vents 110, 120, 130, and 140 may be a floor vent 110, a defrost vent 120, a face vent 130, and a console vent 140 ( Console vent). The floor vent 110 discharges air toward the front seat floor of the vehicle interior, and the defrost vent 120 discharges air toward the vehicle window of the vehicle interior.
And the face vent 130 is a portion for discharging air to the front (front seat) of the vehicle interior, the console vent 140 is connected to the console duct 500 in communication with the console inside the vehicle is connected to the rear side ( Rear seat) to supply air. Here, the floor vent 110, the defrost vent 120, and the face vent 130 have an opening degree adjusted through the doors 110d, 120d, and 130d, respectively.

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Inside the air conditioning case 100, a first blower 400 is provided to inhale and transport air, and a tempor 150 is provided to adjust the opening degree of the cold air passage and the warm air passage. The evaporator 200 is a heat exchanger for cooling air. In more detail, the evaporator 200 is a means for cooling the air provided in the rear side of the first blower 400 in the air flow direction by the first blower 400.

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At this time, the vehicle air conditioner 1000 of the present invention may further be provided with a heater core 300 in the air flow direction, the rear side of the evaporator 200 (see Fig. 2). The heater core 300 is a means for heating the air while the heat exchange medium flows therein. The heat exchanger 700 is a means including a thermoelectric module 742 provided on the console duct 500 connected to the console vent 140 to cool or heat, and part of the refrigerant supplied to the evaporator 200. Is a flexible configuration. On the other hand, as shown in Figure 2, on the console duct 500 may be further provided with a second blower 600 for blowing air to the heat exchanger (700).

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4 and 5 are a perspective view and a cross-sectional view showing a heat exchanger 700 of the vehicle air conditioner 1000 according to the present invention, Figure 6 is a view illustrating the operation of the thermoelectric module 742, Figures 7 and 8 2 is a view showing the operation of the heat exchanger 700 of the vehicle air conditioner 1000 according to the present invention.

The heat exchanger 700 of the present invention includes a first header tank 710 and a second header tank 720, a unit module 740, an inlet pipe 731, and an outlet pipe 732. The first header tank 710 and the second header tank 720 are provided side by side at a predetermined distance. The unit module 740 includes a tube 741, a thermoelectric module 742, and a fin 743, and a plurality of unit modules 740 are provided in the longitudinal direction of the first header tank 710 and the second header tank 720.

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Both ends of the tube 741 are fixed to the first header tank 710 and the second header tank 720 to move the refrigerant. The thermoelectric module 742 is a part of which temperature is controlled by voltages applied to both sides of the tube 741. In addition, the fin 743 is provided on one side (outer side) of the thermoelectric module 742. The air is passed through a region where the fin 743 is formed, and at a temperature of the surface contacted with the fin 743. Are cooled or heated accordingly.

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The thermoelectric module 742 (Thermoelectric Module) is a thermo-electric heat pump using a Peltier effect, means a device made to perform a cooling function similar to a freon compressor or endothermic refrigerator even with a small solid-state device do. Here, the Peltier effect is a phenomenon in which one side is heated and the other side is cooled according to the direction of current when DC power is applied to two different electrical conductors. This phenomenon causes electrons to move from one semiconductor to the other. This occurs because it absorbs thermal energy to raise the level.

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6 is a view illustrating the operation principle of the thermoelectric module 742, and FIG. 6A illustrates a simple circuit that can explain the operation principle of the thermoelectric module 742. Referring to FIG. An N-type semiconductor (a semiconductor whose current carrier is mainly an electron) and a P-type semiconductor (a semiconductor whose current carrier is mainly a hole) are connected with wires 1 and 2 and a power source 3 as shown in FIG. When (3) is applied, electrons get the energy necessary to pass through the system, and as electrons move from the N-type semiconductor to the P-type semiconductor, the electrons passing through the upper surface 5 absorb the thermal energy so that the upper surface 5 Is cooled and the lower surface 4 is heated because electrons emit thermal energy in the lower surface 4. At this time, if proper heat transfer is performed between the upper surface 5 where cooling occurs and the lower surface 4 where heating occurs, the thermoelectric module 742 moves a heat pump from the upper surface 5 to the lower surface 4. Will work as).

6B illustrates a general thermoelectric module 742. As shown, the P-type semiconductor and the N-type semiconductor are arranged to cross each other on a plane, connected to each other by a conductor, and the substrate is covered on the top and bottom. As shown in FIG. 6 (B), when electricity of (+) and (−) is applied from the outside, as shown in FIG. 6, an endothermic phenomenon occurs on one side and a heat dissipation phenomenon occurs on the other side. As shown in FIG. 6 (B), thermoelectric modules 742 which are generally used have a plurality of P-type and N-type semiconductors arranged in a form in which a pair of positive and negative wires are coupled to supply electricity thereto. consist of.

7 and 8 are views illustrating the unit module 740 at the time of cooling and heating, respectively. First, the cooling state will be described with reference to FIG.

When the vehicle air conditioner 1000 of the present invention is cooled, the side with the fin 743 of the thermoelectric module 742 is provided with a low temperature part, and the side with the tube 741 is formed with a high temperature part. At this time, the air passing through the heat exchanger 700 is cooled while being heat-exchanged with the fin 743 forming the low temperature portion, the low-temperature refrigerant is supplied to the inside of the tube 741 forming the high temperature portion can effectively radiate heat, Accordingly, the vehicle air conditioner 1000 of the present invention has an advantage of improving cooling efficiency.

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And the vehicle air conditioner 1000 of the present invention, when heating, the side with the fin 743 of the thermoelectric module 742 is formed a high temperature portion, the side with the tube 741 is formed a low temperature portion, the heat exchange Air passing through the gas 700 is heated while heat-exchanging with the fin 743 forming the hot portion.

The inlet pipe 731 is connected to the first header tank 710 or the second header tank 720 to receive the refrigerant, and the outlet pipe 732 is the first header tank 710 or the first header tank 710. 2 is connected to the header tank 720 is a portion where the refrigerant is discharged.
Referring to the configuration for supplying the refrigerant into the tube 741 of the heat exchanger 700, the vehicle air conditioner 1000 of the present invention is a compressor 810, a condenser 820, the first expansion valve 830 , And the evaporator 200 is connected by the first pipe 800 so that the refrigerant is sequentially circulated, and the second-1 pipe 901 and the second-2 pipe 902 are further formed. (See Figure 3)

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The compressor 810 sucks and compresses the gaseous refrigerant, converts the gaseous refrigerant into a gaseous state of high temperature and high pressure, and discharges the gaseous refrigerant to the condenser 820. The condenser 820 condenses the high-temperature, high-pressure gaseous refrigerant discharged from the compressor 810 to the outside air, condenses it into a high-temperature, high-pressure liquid, and discharges the same to the first expansion valve 830.

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The first expansion valve 830 (Expansion Valve) is provided on the pipe connecting the condenser 820 and the evaporator 200, the throttling action while moving the high temperature and high pressure liquid refrigerant discharged from the condenser 820 By the rapid expansion by the low temperature low pressure wetting state is moved to the evaporator 200.

The evaporator 200 is a means for heat-exchanging the low pressure liquid refrigerant throttled by the first expansion valve 830 with air blown to the inside of the vehicle, and evaporates the refrigerant. The air discharged to the air is cooled.

On the other hand, the 2-1 pipe 901 is one end is branched from the first pipe 800 connecting the condenser 820 and the first expansion valve 830 and the other end is the inlet pipe 731 As a part connected to, the refrigerant passing through the condenser 820 is supplied to the heat exchanger 700 side.

The second-2 pipe 902 is a portion at which one end is connected to the outlet pipe 732 and the other end is connected to the first pipe 800 connecting the evaporator 200 and the compressor 810. The refrigerant passing through the tube 741 of the heat exchanger 700 is supplied to the compressor 810 through the first pipe 800 again.

At this time, it is preferable that the second expansion valve 910 is further provided on the front side of the heat exchanger 700 on the second-first pipe 901 in the refrigerant flow direction. The second expansion valve 910 controls the movement of the refrigerant supplied to the heat exchanger 700, and is rapidly expanded by the throttling action while the liquid refrigerant of the high temperature and high pressure discharged from the condenser 820 is moved, thereby reducing the low pressure. After the wet state is supplied to the heat exchanger (700).

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That is, in the vehicle air conditioner 1000 according to the present invention, the refrigerant is transferred through the first pipe 800 to the compressor 810-> condenser 820-> first expansion valve 830-> evaporator 200. While circulating, cooling of the front side (front seat) of the vehicle interior is performed by air that exchanges heat with the evaporator 200, and the refrigerant between the condenser 820 and the first expansion valve 830 branches (second 2- 1 pipe 901 is circulated through the second expansion valve 910-> heat exchanger 700 and moved between the evaporator 200 and the compressor 810 again (2-2 pipe 902), The vehicle interior rear (rear seat) cooling is performed by the air that exchanges heat with the heat exchanger 700.

Accordingly, the vehicle air conditioner 1000 of the present invention can be cooled and heated by using the heat exchanger 700 using the thermoelectric module 742 on the console vent 140, and can be downsized with a simple configuration and cooled. When some of the refrigerant supplied to the evaporator 200 flows, there is an advantage that the cooling efficiency can be increased by effectively cooling the high temperature part of the thermoelectric module 742.

Particularly, in the vehicle air conditioner 1000 of the present invention, the refrigerant is branched from the pipe between the condenser 820 and the first expansion valve 830 so that the pressure is controlled by the second expansion valve 910 so that the heat exchanger 700 is provided. Since it is supplied to, it is possible to adjust the supply amount and pressure of the refrigerant there is an advantage that can increase the heat dissipation effect of the high temperature portion of the thermoelectric module 742.

The present invention is not limited to the above-described embodiments, and the scope of application is not limited, and various modifications can be made without departing from the spirit of the present invention as claimed in the claims.

1000: vehicle air conditioner
100: air conditioning case
110: floor vent 110d: floor vent door
120: defrost vent 120d: defrost vent door
130: face vent 130d: face vent door
140: console vent
150: tempdoor
200: evaporator
300: heater core
400: first blower
500: console duct
600: second blower
700: heat exchanger
710: first header tank 720: second header tank
731: inlet pipe 732: outlet pipe
740: unit module
(1, 2 wires, 3 power, 4 bottom surface of thermoelectric module, 5 top surface of thermoelectric module)
741: tube 742: thermoelectric module
743: pin
800: first piping
810: Compressor
820: Condenser
830: first expansion valve
901: 2-1 piping 902: 2-2 piping
910: second expansion valve

Claims (4)

An air conditioning case (100) having a floor vent (110), a defrost vent (120), a face vent (130), and a console vent (140) whose openings are adjusted by doors (110d, 120d, 130d), respectively; In the vehicle air conditioner (1000) including an evaporator (200) provided in the air conditioning case (100) to cool the air;
2-1 pipe 901 branched from the first pipe 800 connecting the condenser 820 and the first expansion valve 830, and the first pipe connecting the evaporator 200 and the compressor 810. 2-2 pipe 902 connected to the 800, and the heat exchanger 700 is installed between the 2-1 pipe 901 and the 2-2 pipe 902 and installed in the console duct (500). It includes;
The heat exchanger 700, the first header tank 710 and the second header tank 720, the tube 741 connected to both ends of the first header tank 710 and the second header tank 720, the A plurality of unit modules each comprising a thermoelectric module 742, the temperature is adjusted by the voltage applied to the both sides of the tube 741, and a pin 743 provided on the outer surface of the thermoelectric module 742 740;
The air heat-exchanged while passing through the evaporator 200 of the first pipe 800 and the air heat-exchanged while passing through the heat exchanger 700 installed between the 2-1 pipe 901 and the 2-2 pipe 902 Vehicle air conditioning apparatus, characterized in that each can be supplied to the interior of the vehicle.
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Vehicle air conditioning apparatus further comprises a second expansion valve (910) installed in the front side of the heat exchanger (700) of the second-1 pipe (901) in the refrigerant flow direction.

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