KR101171151B1 - Air-Conditioning System using Exhaustion Heat Recovery Ejector - Google Patents

Abstract

The present invention relates to an exhaust heat recovery ejector air conditioning system, and an object of the present invention is to provide an exhaust heat recovery ejector air conditioning system for improving vehicle fuel efficiency by performing compression of a refrigerant using an exhaust heat recovery heat exchanger and an ejector replacing a compressor. Is in.
Exhaust heat recovery ejector air conditioning system of the present invention, the condenser 110 for discharging the liquefied heat to heat the surrounding air and condensing the refrigerant; An expansion valve 120 for branching the refrigerant discharged from the condenser 110 and receiving one of the refrigerant from the condenser 110 through the first passage 161 to expand the refrigerant; An evaporator 130 which receives the refrigerant discharged from the expansion valve 120, absorbs heat of vaporization, cools the surrounding air, and evaporates the refrigerant; The heterogeneous heat exchange medium includes a first heat exchanger 141 and a second heat exchanger 142, each of which flows therein, and the first heat exchanger 141 is a refrigerant discharged from the condenser 110. Is branched, and the other one of the refrigerant other than the refrigerant flowing into the expansion valve 120 is introduced through the second flow path 162 to be heat-exchanged and then discharged, and the second heat exchanger 142 flows in the exhaust gas. A heterogeneous heat exchanger (140) for compressing the refrigerant at a high temperature and high pressure by exchanging heat after receiving the heat exchanged in the first heat exchange unit (141) and the exhaust gas in the second heat exchange unit (142); The refrigerant discharged from the first heat exchange unit 141 of the heterogeneous heat exchanger 140 is introduced into the nozzle unit 151, and the refrigerant discharged from the evaporator 130 is introduced into the suction unit 152, and the refrigerant is supplied. Ejector 150 to boost the flow into the condenser 110; And a control unit.

Description

Air-Conditioning System using Exhaustion Heat Recovery Ejector}

The present invention relates to an exhaust heat recovery ejector air conditioning system.

In general, a heat exchange system is composed of a condenser that discharges heat from the surroundings, an expansion valve for expanding the heat exchange medium, an evaporator for absorbing heat, and a compressor for compressing the heat exchange medium. Here, the evaporator or the condenser is a representative heat exchanger, and the heat exchanger is a device that absorbs heat from one side and releases heat to the other side between two environments having a temperature difference. In more detail, the gaseous refrigerant flowing from the evaporator into the compressor is compressed at a high temperature and high pressure in the compressor, and liquefied heat is released to the surroundings in the process of liquefying the compressed gaseous refrigerant through the condenser. The liquefied refrigerant passes through the expansion valve again to become a low-temperature and low-pressure wetted vapor state, and then flows back into the evaporator to vaporize to form a cycle. That is, the vaporization heat is absorbed on the evaporator side, and the surrounding air is cooled, and the liquefaction heat is released on the condenser side, and the surrounding air is heated.

1 illustrates a general conventional vehicle air conditioning system. As shown in the drawing, a vehicle air conditioning system, like a general heat exchange system, emits liquefied heat to the surroundings and condensates the heat exchange medium, an expansion valve (2) to expand the heat exchange medium, and heat absorption by absorbing vaporization heat from the surroundings. And an evaporator 3 for vaporizing the medium and a compressor 4 for compressing the heat exchange medium.

In more detail, the condenser 1 makes the refrigerant into a liquid phase by condensing the gaseous refrigerant of high temperature and high pressure with the release of liquefied heat to the outside. The liquid refrigerant discharged from the condenser 1 flows into the expansion valve 2, and after the refrigerant expands in the expansion valve 2, flows into the evaporator 3. In the evaporator 3, the refrigerant absorbs heat of vaporization from the outside, thereby cooling the surrounding air and discharging the refrigerant itself into a low-temperature / low-pressure gas phase. When the low-temperature / low-pressure gaseous refrigerant flows into the compressor 4, the compressor 4 compresses the refrigerant to discharge the high-temperature / high pressure gaseous refrigerant.

At this time, the compressor 4 is generally operated by the power of the engine, and thus there is a problem in that the engine fuel economy is lowered because energy required for the operation of the compressor 4 is consumed.

Accordingly, the present invention has been made to solve the problems of the prior art as described above, an object of the present invention is to improve the vehicle fuel economy by performing the compression of the refrigerant by using an exhaust heat recovery heat exchanger and an ejector to replace the compressor To provide an exhaust heat recovery ejector air conditioning system.

Exhaust heat recovery ejector air conditioning system of the present invention for achieving the above object, the condenser 110 to discharge the liquefied heat to heat the surrounding air to condense the refrigerant; An expansion valve 120 for branching the refrigerant discharged from the condenser 110 and receiving one of the refrigerant from the condenser 110 through the first passage 161 to expand the refrigerant; An evaporator 130 which receives the refrigerant discharged from the expansion valve 120, absorbs heat of vaporization, cools the surrounding air, and evaporates the refrigerant; The heterogeneous heat exchange medium includes a first heat exchanger 141 and a second heat exchanger 142, each of which flows therein, and the first heat exchanger 141 is a refrigerant discharged from the condenser 110. Is branched, and the other one of the refrigerant other than the refrigerant flowing into the expansion valve 120 is introduced through the second flow path 162 to be heat-exchanged and then discharged. A heterogeneous heat exchanger (140) for compressing the refrigerant at a high temperature and high pressure by exchanging heat after receiving the heat exchanged in the first heat exchange unit (141) and the exhaust gas in the second heat exchange unit (142); The refrigerant discharged from the first heat exchange unit 141 of the heterogeneous heat exchanger 140 is introduced into the nozzle unit 151, and the refrigerant discharged from the evaporator 130 is introduced into the suction unit 152, and the refrigerant is supplied. Ejector 150 to boost the flow into the condenser 110; And a control unit.

At this time, the heterogeneous heat exchanger 140 has a plurality of plates 1450 are stacked to form a first medium space 1410 in which a first heat exchange medium flows in a portion facing the front surfaces of the plates 1450. And a second medium space 1420 in which a second heat exchange medium flows in a portion facing the rear surfaces of the plate 1450, and a first medium space 1410 is formed in the plate 1450. A first medium inlet 1411 and a first medium outlet 1412 formed in a through shape so as to introduce and discharge the heat exchange medium, respectively; A first medium tank part 1415 formed in a recessed or protruding region in the vicinity of the first medium inlet 1411 and the first medium outlet 1414 to receive and flow the first heat exchange medium; A second medium inlet 1421 and a second medium outlet 1142 for introducing and discharging a second heat exchange medium into the second medium space 1420, respectively; A second medium tank part 1425 formed to have a recessed or protruding region in the vicinity of the second medium inlet 1421 and the second medium outlet 1142 to accommodate and flow the second heat exchange medium; It is formed in the form of a heat exchanger, the refrigerant and the exhaust gas flows into the first medium space 1410 and the second medium space 1420, respectively. At this time, the heterogeneous heat exchanger 140, it is preferable that the flow of the refrigerant and exhaust gas to form a counter flow.

In addition, the ejector 150 receives the refrigerant discharged from the first heat exchanger 141 of the heterogeneous heat exchanger 140, expands under reduced pressure, and increases the refrigerant flow rate while increasing the refrigerant flow rate, and the nozzle unit 151. From the suction unit 152 to receive and suck the refrigerant discharged from the evaporator 130 by using the increased flow rate of the refrigerant injected from the through, the refrigerant injected from the nozzle unit 151 and the suction unit 152 And a diffuser unit 153 for boosting the pressure of the refrigerant after mixing the refrigerant sucked therein.

Conventional vehicle air conditioning system was composed of a heat exchange system consisting of a general heat exchange system, that is, a condenser-expansion valve-evaporator-compressor, at this time the operation of the compressor has a problem that the engine fuel consumption is consumed to reduce the vehicle fuel economy. However, according to the present invention, the compressor in the conventional heat exchange system is replaced by an ejector and an exhaust heat recovery heat exchanger, thereby compressing the refrigerant and thus consuming no power of the engine, thereby greatly improving the engine fuel efficiency.

1 is a conventional air conditioning system.
2 is an air conditioning system of the present invention.
3 is a heterogeneous heat exchanger provided in the air conditioning system of the present invention.
Figure 4 is an ejector provided in the air conditioning system of the present invention.
5 is an air conditioning system and a ph diagram of the present invention.

Hereinafter, the exhaust heat recovery ejector air conditioning system according to the present invention having the configuration as described above will be described in detail with reference to the accompanying drawings.

Figure 2 shows an exhaust heat recovery ejector air conditioning system according to the present invention. As shown, the air conditioning system of the present invention is similar to the conventional air conditioning system in that it comprises a condenser 110, expansion valve 120, evaporator 130, unlike the conventional air conditioning system, It is omitted, and comprises a heterogeneous heat exchanger 140 and an ejector 150 that can recover the exhaust heat instead. In addition, the refrigerant discharged from the condenser 110 is branched into the first passage 161 and the second passage 162 so that the refrigerant flows into the heterogeneous heat exchanger 140 and the ejector 150, respectively. . Hereinafter, each part will be described in more detail.

The condenser 110, like a condenser in a general air conditioning system, emits liquefied heat to heat ambient air to condense the refrigerant. At this time, the refrigerant discharged from the condenser 110 is branched into the first passage 161 and the second passage 162 as shown in FIG. 2 in the air conditioning system of the present invention.

The expansion valve 120, the refrigerant discharged from the condenser 110 is branched, and receives one of them through the first passage 161, and expands the refrigerant as in the condenser in the general air conditioning system.

The evaporator 130 receives the refrigerant discharged from the expansion valve 120 and, like the condenser in the general air conditioning system, absorbs vaporization heat to cool the surrounding air and evaporates the refrigerant.

Parts replacing the conventional compressor in the air conditioning system of the present invention is the heterogeneous heat exchanger 140 and the ejector 150, which will be described in detail below.

The heterogeneous heat exchanger 140 includes a first heat exchanger 141 and a second heat exchanger 142 through which heterogeneous heat exchange media flow, respectively. At this time, the first heat exchange unit 141 is branched from the refrigerant discharged from the condenser 110, the other of the refrigerant flowing into the expansion valve 120 of the second through the second passage 162. After receiving the heat exchanged and discharged, the second heat exchanger 142 receives the exhaust gas and exchanges the heat. At this time, the refrigerant in the first heat exchanger 141 and the exhaust gas in the second heat exchanger 142 exchange heat, and the exhaust gas of the vehicle has a very high temperature, so the first heat exchanger 141 The refrigerant inside receives heat from the exhaust gas in the second heat exchange unit 142. Accordingly, when the refrigerant in the first heat exchange part 141 and the exhaust gas in the second heat exchange part 142 exchange heat, the refrigerant in the first heat exchange part 141 becomes high temperature and high pressure to obtain the effect of being compressed. do.

A general configuration of a heterogeneous heat exchanger capable of realizing this is as shown in FIG. 3, wherein the heterogeneous heat exchanger 140 has a plurality of plates 1450 stacked to face the front surfaces of the plates 1450. A first medium space 1410 in which the first heat exchange medium flows is formed in the combined portion, and a second medium space 1420 in which the second heat exchange medium flows in the combined portion faces the rear surfaces of the plates 1450. The first medium inlet 1411 and the first medium outlet 1412 are formed in the through-hole to inlet and discharge the first heat exchange medium into the first medium space 1410, respectively. ; A first medium tank part 1415 formed in a recessed or protruding region in the vicinity of the first medium inlet 1411 and the first medium outlet 1414 to receive and flow the first heat exchange medium; A second medium inlet 1421 and a second medium outlet 1142 for introducing and discharging a second heat exchange medium into the second medium space 1420, respectively; A second medium tank part 1425 formed to have a recessed or protruding region in the vicinity of the second medium inlet 1421 and the second medium outlet 1142 to accommodate and flow the second heat exchange medium; It is formed in the form of a heat exchanger. At this time, the refrigerant and the exhaust gas flow into the first medium space 1410 and the second medium space 1420, respectively, so that the refrigerant and the second medium in the first medium space 1410 adjacent to each other. Exhaust gases in the space 1420 are capable of causing heat exchange with each other.

Positions of the first medium inlet 1411, the first medium outlet 1412, the second medium inlet 1421, and the second medium outlet 1142 must be formed in the same manner as illustrated in FIG. 3. There is no. In addition, the shape of the plate 1450 is also not necessarily formed to be the same as shown in FIG. In addition, although the first heat exchange medium is a refrigerant and the second heat exchange medium is exhaust gas in FIG. 3, the two may be interchanged. However, in order to maximize the heat exchange performance between the refrigerant and the exhaust gas, the heterogeneous heat exchanger 140 is preferably configured to arrange the inlet and outlet or to select a medium such that the flow of the refrigerant and the exhaust gas forms an opposite flow.

The ejector 150 receives the refrigerant discharged from the first heat exchange unit 141 of the heterogeneous heat exchanger 140 into the nozzle unit 151, and receives the refrigerant discharged from the evaporator 130 into the suction unit ( The air conditioning cycle is completed by introducing the refrigerant into the condenser 110 by boosting the refrigerant.

4 shows a detailed structure of the ejector 150. The ejector 150 includes a nozzle unit 151, a suction unit 152, and a diffuser unit 153. As shown in FIG. 4, the nozzle unit 151 is formed to have a narrower flow path area, thereby receiving a refrigerant discharged from the first heat exchanger 141 of the heterogeneous heat exchanger 140, and reducing the pressure. Increase the refrigerant flow rate while expanding. The suction unit 152 receives the refrigerant discharged from the evaporator 130 by using the increased flow rate of the refrigerant injected from the nozzle unit 151, and sucks the refrigerant. The diffuser unit 153 mixes the refrigerant injected from the nozzle unit 151 and the refrigerant sucked through the suction unit 152 and then boosts the pressure of the refrigerant.

Fig. 5 shows the air conditioning system and the p-h diagram of the present invention, which are shown in Figs. , Point 7 is also indicated in Fig. 5B. The refrigerant flowing along the first passage 161 is circulated along the path of ①-②-③-④-⑦-① in FIG. 5, and the refrigerant flowing along the second passage 162 is ① in FIG. 5. -②-⑤-⑥-⑦-Circulates along the path of ①.

In summary, in the heterogeneous heat exchanger 140, the refrigerant discharged from the condenser 110 is heated to high temperature and high pressure by heat exchange with a high temperature exhaust gas. In addition, the ejector 150 sucks the refrigerant discharged through the evaporator 130 by using a high temperature / high pressure driving flow discharged from the heterogeneous heat exchanger 140, and the diffuser part of the ejector 150. By mixing and increasing the pressure at 153, the ejector 150 can discharge the high-temperature / high-pressure gaseous refrigerant.

In a conventional conventional air conditioning system, a compressor is used to make the refrigerant discharged from the evaporator into a high temperature and high pressure gas phase. As described above, according to the present invention, the refrigerant can be made into a high temperature and high pressure gas phase without using a compressor. . Accordingly, in the present invention, energy consumption generated by using engine power to drive a compressor in the related art can be saved, and ultimately, an effect of greatly improving engine fuel efficiency can be obtained.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. It goes without saying that various modifications can be made.

100: air conditioning system 110 of the present invention condenser
120: expansion valve 130: evaporator
140: heterogeneous heat exchanger
141: first heat exchanger 142: second heat exchanger
150: ejector 151: nozzle unit
152: suction unit 153: diffuser unit
161: first euro 162: second euro

Claims (3)

A condenser 110 for releasing heat of liquefaction to heat ambient air and condensing the refrigerant;
An expansion valve 120 for branching the refrigerant discharged from the condenser 110 and receiving one of the refrigerant from the condenser 110 through the first passage 161 to expand the refrigerant;
An evaporator 130 which receives the refrigerant discharged from the expansion valve 120, absorbs heat of vaporization, cools the surrounding air, and evaporates the refrigerant;
The heterogeneous heat exchange medium includes a first heat exchanger 141 and a second heat exchanger 142, each of which flows therein.
The first heat exchange part 141 is branched with the refrigerant discharged from the condenser 110, the heat exchanger receives the other one of the refrigerant flowed into the expansion valve 120 through the second passage 162 After discharging, the second heat exchanger 142 is discharged after the heat exchange by receiving the exhaust gas,
A heterogeneous heat exchanger (140) in which the refrigerant in the first heat exchange part (141) and the exhaust gas in the second heat exchange part (142) exchange heat;
The refrigerant discharged from the first heat exchange unit 141 of the heterogeneous heat exchanger 140 is introduced into the nozzle unit 151, and the refrigerant discharged from the evaporator 130 is introduced into the suction unit 152, and the refrigerant is supplied. Ejector 150 to boost the flow into the condenser 110;
Exhaust heat recovery ejector air conditioning system comprising a.
The method of claim 1, wherein the heterogeneous heat exchanger (140)
An exhaust heat recovery ejector air conditioning system, characterized in that the flow of refrigerant and exhaust gas forms an opposite flow.
The method of claim 1, wherein the ejector 150
A nozzle unit 151 for increasing the refrigerant flow rate while expanding under reduced pressure by receiving the refrigerant discharged from the first heat exchange unit 141 of the heterogeneous heat exchanger 140,
Suction unit 152 for receiving and sucking the refrigerant discharged from the evaporator 130 by using the increased flow rate of the refrigerant injected from the nozzle unit 151,
The diffuser unit 153 for mixing the refrigerant injected from the nozzle unit 151 and the refrigerant sucked through the suction unit 152 and then boosting the pressure of the refrigerant.
Exhaust heat recovery ejector air conditioning system comprising a.

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