JP2002081886A - Juxtaposed integral heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance the efficiency of a condenser and a radiator by reducing thermal effect of a condenser for air conditioning and a radiator for cooling internal combustion engine. SOLUTION: The juxtaposed integral heat exchanger comprises a condenser 1 for air conditioning which cools and condenses heating medium delivered from the compressor in refrigeration cycle, and a radiator 4 for cooling internal combustion engine wherein the condenser 1 for air conditioning comprises a high temperature side condenser 2 for cooling high temperature high pressure gaseous heating medium, and a low temperature side condenser 3 for further cooling and condensing heating medium delivered from the high temperature side condenser 2. The low temperature side condenser 3 and the radiator 4 are disposed sequentially from the upstream side toward the downstream side of fluid (cooling air A) being heat exchanged.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a side-by-side integrated heat exchanger, and more particularly, to a side-by-side integrated type heat exchanger equipped with a radiator and an air conditioning condenser mounted on a vehicle such as an automobile. The present invention relates to a heat exchange device.

[0002]

2. Description of the Related Art As a conventional parallel type integrated heat exchanger of this type, an air conditioner condenser for cooling and condensing a heat medium discharged from a compressor of a refrigeration cycle and a radiator for cooling an internal combustion engine are provided. What is known is.

A conventional heat exchange device of this type includes a radiator in front of a radiator (air inflow side) constituting a cooling system of an internal combustion engine.
(See Japanese Utility Model Publication No. 5-40265), or in front of an air conditioning condenser that constitutes a cooling device (air inflow side).
There is known a structure in which a radiator constituting a cooling system of an internal combustion engine is disposed (see JP-A-6-137147 and JP-A-11-304392).

[0004]

However, in the former, that is, the structure described in Japanese Utility Model Publication No. 5-40265, for example, when the outside air temperature is high in summer and the cooling device is operated, cooling air taken in from the front of the vehicle is taken. Is heated by the air-conditioning condenser, the temperature of the cooling air entering the radiator further increases, the cooling performance of the radiator decreases, and the cooling water temperature of the internal combustion engine increases easily.
There has been a problem that the efficiency is reduced and sometimes the internal combustion engine is apt to overheat.

On the other hand, the latter, that is, Japanese Patent Laid-Open No.
No. 7147 and Japanese Patent Application Laid-Open No. 11-304392 disclose that the efficiency of the internal combustion engine does not decrease and the overheating does not easily occur because the cooling air temperature to the radiator is low. There is a problem that the cooling performance of the condenser is insufficient and the performance of the cooling device is reduced.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has a side-by-side integrated heat exchanger in which the thermal effects of an air conditioning condenser and a radiator for cooling an internal combustion engine are reduced, and the efficiency of the condenser and the radiator is increased. The challenge is to provide

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, an invention according to claim 1 is an air-conditioning condenser for cooling and condensing a heat medium discharged from a compressor of a refrigeration cycle, and cooling an internal combustion engine. A parallel-integrated heat exchange device comprising a radiator for
A high-temperature side condenser for cooling a high-temperature and high-pressure gaseous heat medium, and a low-temperature side condenser for further cooling and condensing the heat medium discharged from the high-temperature side condenser,
The low-temperature condenser and the radiator are arranged in order from the upstream side to the downstream side of the flow of the heat exchange fluid.

[0008] With this configuration, the heat exchange fluid is first taken into the low-temperature condenser, and further cools and condenses the cooling heat medium cooled by the high-temperature condenser, and then passes through the low-temperature condenser. The heat exchange fluid cools the cooling water of the radiator, and the heat exchange fluid passing through the radiator cools and flows the high-temperature heat medium of the high-temperature side condenser.

That is, when considering the radiator as a center, when the heat-exchange fluid passes through the conventional condenser having the low-temperature side and the high-temperature side, the temperature of the heat-exchange fluid greatly increases due to the large temperature difference. The efficiency of the radiator is reduced. On the other hand, by dividing the low-temperature side condenser and the high-temperature side condenser, the efficiency of the radiator is minimized because the temperature difference of the heat exchange fluid on the front surface with respect to the low-temperature side condenser is small. Therefore, the thermal effects of the low-temperature side condenser and the radiator, that is, the air conditioning condenser and the radiator can be reduced, and the efficiency of the condenser and the radiator can be increased.

According to a second aspect of the present invention, there is provided an integrated heat exchanger having an air conditioning condenser for cooling and condensing a heat medium discharged from a compressor of a refrigeration cycle and a radiator for cooling an internal combustion engine. The air conditioning condenser is separately formed into a high-temperature condenser for cooling a high-temperature and high-pressure gaseous heat medium and a low-temperature condenser for further cooling and condensing the heat medium discharged from the high-temperature condenser. The low-temperature condenser, the radiator and the high-temperature condenser are arranged in order from the upstream side to the downstream side of the flow of the heat-exchanged fluid, and the low-temperature condenser and the high-temperature condenser are each paired with a header pipe,
A plurality of parallel heat exchange tubes installed between the header pipes, and heat exchange fins disposed between the heat exchange tubes; The width of the fins in the flow direction of the heat exchange fluid is thinner on the low-temperature side condenser side than on the high-temperature side condenser.

With this configuration, the fluid to be heat-exchanged is first taken into the low-temperature condenser, further cooling and condensing the cooling heat medium cooled by the high-temperature condenser, and then passing through the low-temperature condenser. The heat exchange fluid cools the cooling water of the radiator, and the heat exchange fluid passing through the radiator cools and flows the high-temperature heat medium of the high-temperature side condenser.

That is, when considering the radiator as a center, when the heat-exchange fluid passes through the conventional condenser having the low-temperature side and the high-temperature side, the temperature increase of the heat-exchange fluid is large due to the large temperature difference. The efficiency of the radiator is reduced. On the other hand, by dividing the low-temperature condenser and the high-temperature condenser before and after the radiator, the efficiency with respect to the radiator has a small temperature difference between the heat exchange fluid on the front and the low-temperature condenser, and the width of the low-temperature condenser on the front. , The rise in temperature and pressure loss is minimized. Also, when viewed from the condenser side, cooling and condensation at the low-temperature condenser are efficient due to the small pressure loss, that is, the small width, and
Cooling of the high-temperature side condenser can be sufficiently performed with the heat exchange fluid after passing through the radiator because of the large temperature difference.

Therefore, the thermal effects of the low-temperature condenser and the radiator, that is, the air-conditioning condenser and the radiator can be reduced, and the efficiency of the condenser and the radiator can be increased.

According to a third aspect of the present invention, in the side-by-side integrated heat exchanger according to the first or second aspect, the low-temperature condenser includes a cooling section for the heat medium and a subcooling section for condensing the heat medium. It is characterized by having. In this case, it is preferable to interpose a liquid receiver for gas-liquid separation of the heat medium between the cooling unit and the supercooling unit. Further, it is preferable that the liquid receiver is integrally joined to the header pipe of the low-temperature condenser (claim 5).

With this configuration, the heat exchange fluid is first heat-exchanged with the cooling section and the supercooling section of the low-temperature condenser, so that the efficiency of the low-temperature condenser, that is, the air conditioning condenser, can be further increased. (Claim 3). In this case, a liquid receiver for gas-liquid separation of the heat medium is provided between the cooling unit and the supercooling unit, so that the heat medium condensed by the cooling unit passes through the liquid receiver when the heat medium condensed by the cooling unit passes through the liquid receiver. Then, the liquefied heat medium flows to the supercooling section. The heat medium is further condensed (supercooled) by performing heat exchange with the heat exchange fluid and releasing latent heat while passing through the supercooling section, thereby further improving efficiency. (Claim 4). Also, by integrally joining the liquid receiver to the header pipe of the low-temperature condenser, the number of piping members can be reduced and the space can be effectively used (claim 5).

In the present invention, the low-temperature condenser is disposed so as to overlap substantially the entire surface of the radiator, or to overlap the upper or lower part of the radiator.

With such a configuration, the arrangement of the low-temperature side condenser and the radiator can be appropriately set. Also, when the low-temperature condenser is superimposed on the upper or lower part of the radiator, the heat exchange fluid can be directly introduced into the lower or upper part of the radiator.
The cooling performance of the radiator can be improved.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described.
This will be described in detail with reference to the accompanying drawings.

First Embodiment FIG. 1 is a schematic perspective view showing a first embodiment of a side-by-side integrated heat exchanger according to the present invention, and FIG. 2 is a sectional view taken along line II of FIG. FIG. 3 is a configuration diagram showing components of the heat exchange device of the first embodiment in a developed manner.

The heat exchange device is mainly composed of an air conditioning condenser 1 for cooling and condensing a heat medium discharged from a compressor 8 of a refrigeration cycle, and a radiator 4 for cooling an internal combustion engine. In this case, the air-conditioning condenser 1 is a high-temperature condenser 2 for cooling a high-temperature and high-pressure gaseous heat medium.
And a low-temperature condenser 3 for further cooling and condensing the heat medium flowing out of the high-temperature condenser 2. In addition, in order from the upstream side to the downstream side of the flow of the heat exchange fluid (air A), the low-temperature side condenser 3,
A radiator 4 and a high-temperature-side capacitor 2 are provided. The low-temperature-side capacitor 3, the radiator 4, and the high-temperature-side capacitor 2 are connected to upper and lower mounting members 21 and 22.
(Refer to FIG. 2) and are integrally fixed in parallel at appropriate intervals. In this case, the outlet 12 of the high-temperature side condenser 2 and the inlet 11A of the low-temperature side condenser 3 are connected to the pipe 9
Connected by A.

The pipe 9 connecting the inlet 11 of the high-temperature condenser 2 and the outlet 12A of the low-temperature condenser 3
, A liquid receiver 5, an expansion valve 6, an evaporator 7, and a compressor 8 are provided in this order from the low-temperature side condenser 3 side. Therefore, the compressor 8, the high temperature side condenser 2, the low temperature side condenser 3, the liquid receiver 5, the expansion valve 6, and the evaporator 7 form an air conditioning system AC of a refrigeration cycle (see FIG. 3).
In the air-conditioning system AC configured as described above, the high-temperature and high-pressure gaseous heat medium discharged from the compressor 8 passes through the high-temperature side condenser 2 and exchanges heat with the heat exchange fluid such as the cooling air A. By exchanging latent heat by performing exchange, it goes to condensation. The high-temperature heat medium thus cooled flows to the low-temperature condenser 3 through the pipe 9A,
During the passage through the low-temperature condenser 3, heat is exchanged with the cooling air A to release latent heat, so that the cooling air is further cooled and condensed.

The outlet 12A of the low-temperature condenser 3
Liquefied heat medium discharged from is sent to the liquid receiver 5,
Only the liquid heat medium gas-liquid separated in the liquid receiver 5 is sent to the expansion valve 6 and injected from a small hole (not shown) by the expansion valve 6 to be adiabatically expanded to form a low-temperature low-pressure mist. And sent to the evaporator 7. In the evaporator 7, the heat medium evaporates and vaporizes by absorbing heat by exchanging heat with a heat exchange fluid such as air. The low-temperature and low-pressure heat medium thus vaporized is sent to the compressor 8 and adiabatically compressed, becomes a high-temperature and high-pressure gaseous heat medium, and is sent to the high-temperature side condenser 2 of the air conditioning condenser 1 again. By repeating such a series of cycles, the air conditioning system AC can be used for cooling and heating.

The high-temperature condenser 2 configured as described above includes a pair of header pipes 13 and 14, a plurality of parallel heat exchange tubes 15 installed between the header pipes 13 and 14, It mainly comprises a heat exchange fin, for example, a corrugated fin 16 disposed between the tubes 15. In this case, an inlet 11 for the heat medium is provided at the upper end of one (left side in the figure) header pipe 13, and the other (right side in the figure) header pipe 14 is provided.
An outlet 12 for the heat medium is provided in the lower column. In addition, a partition plate 17a is provided at about 2/3 from the lower end of one header pipe 13, and the other header pipe 1
A partition plate 17b is provided at about 1/3 from the lower end of 4 (see FIG. 3). Therefore, the heat medium flowing from the inlet 11 is substantially S-shaped by the partition plates 17a and 17b.
It flows through the heat exchange tube 15 in a letter shape and flows out from the outlet 12. Note that side plates 18 are attached to the upper and lower ends of the high-temperature side condenser 2 in a state of being bridged between the header pipes 13 and 14.

The header pipes 13 and 14 constituting the high-temperature side condenser are formed of, for example, an aluminum electric resistance welded pipe. The heat exchange tube 15 is formed of an extruded aluminum member having a plurality of communication passages (not shown). In addition, corrugated fins 16
Is formed by bending an aluminum strip into a wavy shape. The side plate 18 is formed of an extruded aluminum member similarly to the heat exchange tube 15. These aluminum header pipes 13,1
4. The high-temperature side condenser 2 is formed by brazing the heat exchange tubes 15, the corrugated fins 16 and the side plates 18.

The low-temperature condenser 3 is, like the high-temperature condenser 2, a pair of header pipes 13A, 14A.
And a plurality of parallel heat exchange tubes 15A installed between the header pipes 13A and 14A, and heat exchange fins such as corrugated fins 16A arranged between the heat exchange tubes 15A. I have. In this case, an inlet 11A for the heat medium is provided at the upper end of one (right side in the figure) header pipe 13A, and an outlet 12A for the heat medium is provided in the lower column of the other (left side) header pipe 14A. Is provided. A partition plate 17c is provided at about 2/3 from the lower end of one header pipe 13A.
Is provided, and a partition plate 17d is provided at a location approximately one-third from the lower end of the other header pipe 14A (see FIG. 3). Therefore, the heat medium flowing from the inflow port 11A flows through the heat exchange pipe 15A in a substantially S-shape by the partition plates 17c and 17d, and flows out from the outflow port 12A.

At the upper and lower ends of the low-temperature condenser 3, side plates 18 are provided on both header pipes 13A and 14A.
It is attached to the state where it was erected. The header pipes 13A and 14A, the heat exchange tubes 15A, the corrugated fins 16A, and the side plates 18 are each formed of an aluminum member, and
It is integrally formed by brazing in the same manner as in the above.

The radiator 4 also has a pair of header pipes 13B, 14B and a header pipe 1B, like the high-temperature condenser 2 and the low-temperature condenser 3.
It is mainly composed of a plurality of parallel heat exchange tubes 15B provided between 3B and 14B, and heat exchange fins such as corrugated fins 16B provided between the heat exchange tubes 15B. In this case, an inlet 11B for cooling water is provided at the upper end of one (right side in the figure) header pipe 13B, and an outlet 12B for cooling water is provided in the lower column. A side plate 18 is attached to the upper and lower ends of the radiator 4 so as to extend between the header pipes 13B and 14B. The header pipe 13B,
14B, the heat exchange tubes 15B, the corrugated fins 16B, and the side plates 18 are each formed of an aluminum member, and are integrally formed by brazing similarly to the high-temperature side capacitor 2 and the low-temperature side capacitor 3.

As described above, the high-temperature side condenser 2, the low-temperature side condenser 3 and the radiator 4 configured as described above are arranged such that the heat exchange fluid, for example, the air A flows from the upstream side to the downstream side of the low-temperature side. The capacitor 3, the radiator 4, and the high-temperature-side capacitor 2 are arranged in this order, and the width dimension of the corrugated fins 16 and 16 </ b> A in the high-temperature-side capacitor 2 and the low-temperature-side capacitor 3 in the air flow direction is set to The low temperature side capacitor 3 side is formed thin. That is, as shown in FIG. 2, the width dimension of the corrugated fin 16A of the low-temperature side capacitor 3 is set to T.
a, when the width dimension of the corrugated fin 16 of the high-temperature side capacitor 2 is Tb, the corrugated fin 16 is formed so as to satisfy the relationship of Ta <Tb.

As described above, by arranging the low-temperature condenser 3, the radiator 4, and the high-temperature condenser 2 in order from the upstream side to the downstream side of the flow of the air A (heat exchange fluid), the air A After the cooling medium (heat medium) first taken into the low-temperature condenser 3 and further cooled and condensed by the high-temperature condenser 2, the air A passing through the low-temperature condenser 3 cools the cooling water of the radiator 4. The air A that has cooled and passed through the radiator 4 cools the high-temperature heat medium of the high-temperature condenser 2 and flows. Therefore, the thermal effects of the low-temperature condenser 3, the radiator 4, and the high-temperature condenser 2, that is, the air-conditioning condenser 1 and the radiator 4, can be reduced. When the heat medium passes through the high-temperature condenser 2, the heat medium is exchanged with the air A passing through the radiator 4 and is cooled. Then, the heat medium is sent to the low-temperature condenser 3 and exchanged with the air A to further cool and condense. Therefore, the efficiency of the capacitor can be increased.

Further, by setting the widths Ta and Tb of the corrugated fins 16 and 16A in the flow direction of the air A in the low-temperature condenser 3 and the high-temperature condenser 2 to Ta <Tb, the width (Tb After the high-temperature and high-pressure heat medium is cooled by the high-temperature condenser 2 which can take a large amount), the cooling medium can be further cooled and condensed by the low-temperature condenser 3, so that the efficiency of the air conditioning condenser 1 is not impaired, Side capacitor 2
Pressure loss of the air A flowing through the air can be reduced.

In other words, considering the radiator 4 as a center, when the heat exchange fluid (air A) passes through a conventional condenser having a low temperature side and a high temperature side, the amount of air A is increased by the large temperature difference. The rise in temperature and pressure loss increases, and the efficiency of the radiator 4 decreases. On the other hand, by dividing the low-temperature side condenser 3 and the high-temperature side condenser 2 before and after the radiator 4 as in the present invention, the efficiency of the radiator 4 can be reduced by reducing the temperature difference between the air A on the front side and the low-temperature side condenser 3 and the front side. , The width (Ta) of the low-temperature side capacitor 3 becomes thinner, so that rises in temperature and pressure loss are minimized.

Also, when viewed from the condenser side, the cooling and condensation in the low-temperature condenser 3 is efficient because of the small air pressure loss, that is, the width (Ta) is small, and the cooling of the high-temperature condenser 2 is efficient. Radiator 4 due to large temperature difference
It can be sufficiently performed with the heat exchange fluid (air A) after passing.

Second Embodiment FIG. 4 is a schematic perspective view showing a second embodiment of the heat exchange device of the present invention, and FIG. 5 is a configuration in which the components of the heat exchange device of the second embodiment are developed. FIG.

The second embodiment is a case where the efficiency of the air conditioning condenser 1 is further improved. That is,
The second embodiment is a case in which the cooling efficiency of the low-temperature side condenser 3 is improved to further improve the efficiency of the air conditioning condenser 1 as a whole.

In this case, as shown in FIG. 5, the low-temperature condenser 3 includes first and second header pipes 13A and 13A.
A partition plate 17e is disposed at approximately one third of the lower end of 4A at the same position, and is divided into an upper cooling section 31 and a lower supercooling section 32. Note that a partition plate 17c is provided at about 2/3 from the lower end of the first header pipe 13A, as in the first embodiment. Outflow holes 33 and inflow holes 34 for the heat medium are formed in the upper and lower portions of the first header pipe 13A in the vicinity of the partition plate 17e, respectively.
The liquid receiver 5 is connected via a second connection tube 36 connected to the connection tube 35 and the inflow hole 34.

In the second embodiment, the other parts are the same as those in the first embodiment, and the same parts are denoted by the same reference numerals and description thereof will be omitted.

According to the heat exchanger configured as described above, the heat medium cooled by the high-temperature side condenser 2 is:
It flows into the cooling part 31 of the low-temperature side condenser 3 from the inlet 11A of the low-temperature side condenser 3 through the pipe 9A, and while passing through the cooling part 31, heat exchange with the air A taken into the heat exchange device is performed. After being cooled again, it flows into the receiver 5 through the outlet 33 and the first connection tube 35, and the liquefied heat medium gas-liquid separated by the receiver 5 is supplied to the second connection tube. It flows into the subcooling section 32 through the inlet 36 and the inlet 34. Then, when passing through the supercooling section 32, the air is further condensed (supercooled) by heat exchange with the air A, and the outlet 12 of the second header pipe 14 </ b> A is formed.
Flowed out of A.

Therefore, the heat medium cooled by the high-temperature condenser 2 is cooled again by the cooling section 31 of the low-temperature condenser 3 and then condensed (supercooled) by the super-cooling section 32. The efficiency of the capacitor 1 can be further increased.

Third Embodiment FIG. 6 is an exploded structural view showing components of a third embodiment of the heat exchange apparatus of the present invention, and FIG. 7 is an enlarged side view of a main part of the third embodiment. 8 is a sectional view taken along the line II-II in FIG.

The third embodiment is a case where the heat exchange efficiency can be improved, the installation space can be effectively used, and the number of piping members can be reduced. That is, the first and second embodiments of the second embodiment are described.
In this case, the first header pipe 13A of the low-temperature condenser 3 and the receiver 5 are integrally joined by means of direct brazing or the like without using the connection tubes 35 and 36 described above.

In this case, the liquid receiver 5 is one in which the upper and lower ends of a cylindrical liquid receiver main body 51 are closed by lids 52, and the peripheral surface of the liquid receiver main body 51 has an upper fixed joint portion. 53
And the lower fixed joint portion 54 are integrally formed. The upper fixed joint portion 53 and the lower fixed joint portion 54 are formed in an arc portion 55 having a shape corresponding to the outer peripheral surface of the first header pipe 13A.
And a body portion 56 that integrally connects the arc portion 55 to the liquid receiver main body 51. Also, the lower fixed joint 54
An inflow hole 57 that communicates between the inside of the header pipe 13A above the partition plate 17e disposed in the first header pipe 13A and the inside of the receiver main body 51 penetrates therethrough. An outflow hole 58 that communicates with the inside of the header pipe 13A on the lower side of 17e and the inside of the liquid receiver main body 51 penetrates. The liquid receiver main body 51 thus formed is integrally formed by an extruded aluminum member.
In the liquid receiver 5, other members such as the lid 52 other than the liquid receiver main body 51 are also made of aluminum, and are integrated by brazing.

The low-temperature condenser 3 is constructed by assembling the header pipes 13A and 14A, the heat exchange pipe 15A, the corrugated fin 16A and the like into a predetermined shape, and assembling the liquid receiver 5 in the same manner. In a state where the liquid receiver 5 is held at a predetermined position of the first header pipe 13A, it is put into a furnace and heated, whereby the whole is integrally brazed.

Therefore, according to the heat exchanger of the third embodiment, the first header pipe 1
Since the 3A and the liquid receiver 5 can be integrally joined by means such as brazing, the number of piping members can be reduced, and the installation space can be effectively used.

In the third embodiment, the other parts are the same as those in the first and second embodiments. Therefore, the same parts are denoted by the same reference numerals and description thereof will be omitted.

Fourth Embodiment FIG. 9 is a schematic perspective view showing a fourth embodiment of the heat exchange device of the present invention, and FIG. 10 is a schematic perspective view showing another arrangement example of the fourth embodiment.

The fourth embodiment is a case where the cooling efficiency of the radiator 4 is improved. In this case, the height dimension Ha of the low-temperature condenser 3 is set to about 1/2 of the height dimension Hb of the radiator 4, and the low-temperature condenser 3 is placed in front of the radiator 4, that is, the upper part on the air A inflow side (FIG. 9). Alternatively, it is arranged at the lower part (FIG. 10). The height Ha of the low-temperature condenser 3 does not necessarily have to be about 1/2 of the height Hb of the radiator 4 and can be appropriately set according to the heat exchange efficiency of the low-temperature condenser 3.

As described above, by disposing the low-temperature condenser 3 in the upper or lower part in front of the radiator 4 (air inflow side), the lower or upper part of the radiator 4 is exposed. 4, the cooling performance of the radiator 4 can be improved.

In the fourth embodiment, other parts are the same as those in the first to third embodiments.
The same portions are denoted by the same reference numerals, and description thereof will be omitted.

Fifth Embodiment FIG. 11 is a schematic perspective view showing a fifth embodiment of the heat exchange device of the present invention, and FIG. 12 is a schematic perspective view showing another example of arrangement of the fifth embodiment.

In the fifth embodiment, the cooling efficiency of the radiator 4 is improved, and the efficiency of the air-conditioning condenser 1 is improved and the installation space can be effectively used.

That is, similarly to the fourth embodiment, the height Ha of the low-temperature capacitor 3 is reduced to, for example, about ２ of the height Hb of the radiator 4 so that the low-temperature capacitor 3 is reduced. It is disposed in front of the radiator 4, that is, in the upper or lower part on the inflow side of the air A, and is connected to the cooling section 31 in the first header pipe 13A of the low-temperature condenser 3 as in the second and third embodiments. This is a case where the cooling unit 32 is formed, and the liquid receiver 5 is interposed between the cooling unit 31 and the supercooling unit 32.

In this case, the height Ha of the low-temperature condenser 3 does not necessarily have to be about の of the height Hb of the radiator 4, and is appropriately set according to the heat exchange efficiency of the low-temperature condenser 3. can do. Further, the liquid receiver 5 may be connected to the first header pipe 13A of the low-temperature condenser 3 using the connection tubes 33 and 34, but without using the connection tubes 33 and 34, a means such as brazing is used. It is more preferable that the first header pipe 13A and the liquid receiver 5 are integrally joined together.

By disposing the low-temperature condenser 3 in the upper part (FIG. 11) or the lower part (FIG. 12) in front of the radiator 4 (air inflow side) as described above, the lower part of the radiator 4 is exposed. The air A can be taken directly into the lower part of the radiator 4, and the cooling performance of the radiator 4 can be improved. Further, after the heat medium cooled by the high-temperature side condenser 2 is cooled again by the cooling unit 31 of the low-temperature side condenser 3, it is further condensed (super-cooled) by the supercooling unit 32. Efficiency can be further improved.

Other Embodiments In the above embodiment, the high-temperature side condenser 2 is connected to the radiator 4
Although the case where the height is substantially the same as that described above, the height of the high-temperature side capacitor 2 is made smaller than the height of the radiator 4 in the same manner as in the fourth and fifth embodiments, and the rear side of the radiator 4 (cooling). It may be arranged on the upper or lower side of the air outlet side).

[0055]

As described above, according to the present invention, because of the above-described configuration, the following excellent effects can be obtained.

(1) According to the first aspect of the invention, by dividing the low-temperature condenser and the high-temperature condenser, the efficiency of the radiator with respect to the radiator is such that the temperature difference of the heat exchange fluid on the front surface with respect to the low-temperature condenser is small. Therefore, the temperature rise is minimized. Therefore, the thermal effects of the low-temperature side condenser and the radiator, that is, the air conditioning condenser and the radiator can be reduced, and the efficiency of the condenser and the radiator can be increased.

(2) According to the second aspect of the invention, the low-temperature condenser and the high-temperature condenser, which are separately arranged before and after the radiator, are respectively mounted on a pair of header pipes and between the header pipes. A plurality of heat exchange tubes parallel to each other and heat exchange fins disposed between the heat exchange tubes, and a flow direction of a heat exchange fluid of the heat exchange fins in the low-temperature condenser and the high-temperature condenser. The width dimension of the low-temperature condenser side is made thinner than the high-temperature condenser, so in addition to the above (1), the pressure loss of the heat exchange fluid flowing through the radiator can be reduced without impairing the efficiency of the air conditioning condenser. It is possible to reduce the pressure loss of the heat exchange fluid flowing through the high-temperature side condenser while reducing the pressure loss.

(3) According to the third aspect of the present invention, the low-temperature side condenser includes a cooling section for the heat medium and a supercooling section for condensing the heat medium. Thus, the efficiency of the low-temperature condenser, that is, the air-conditioning condenser, can be further increased.

(4) According to the fourth aspect of the invention, the cooling unit is provided between the cooling unit and the supercooling unit of the low-temperature condenser by separating the heat medium into a liquid and a gas. When the heat medium condensed by the heat medium passes through the receiver, it is separated into gas and liquid, and the liquefied heat medium flows to the subcooling section. Since the latent heat is released by performing the heat exchange in (3), the heat is further condensed (supercooled), so that the efficiency of the air conditioning condenser can be further improved in addition to the above (3).

(5) According to the fifth aspect of the present invention, since the liquid receiver is integrally joined to the header pipe of the low-temperature condenser, the number of piping members can be reduced in addition to (4), and the space can be reduced. Effective use can be achieved.

(6) According to the sixth aspect of the present invention, the low-temperature side condenser is disposed so as to be superposed on substantially the entire surface of the radiator, or is disposed so as to be superposed on the upper or lower part of the radiator. The configuration of the arrangement of the condenser and the radiator can be appropriately set. Also, if the low-temperature condenser is superimposed on the upper or lower part of the radiator,
Since the heat exchange fluid can be directly taken into the lower or upper part of the radiator, the cooling performance of the radiator can be further enhanced in addition to the above (1) to (5).

[Brief description of the drawings]

FIG. 1 is a schematic perspective view showing a first embodiment of a heat exchange device of the present invention.

FIG. 2 is a cross-sectional view taken along the line II of FIG.

FIG. 3 is an exploded configuration diagram showing components of the heat exchange device of the first embodiment.

FIG. 4 is a schematic perspective view showing a second embodiment of the heat exchange device of the present invention.

FIG. 5 is an exploded configuration diagram illustrating components of the heat exchange device according to the second embodiment.

FIG. 6 is an exploded configuration diagram showing components of a third embodiment of the heat exchange device of the present invention.

FIG. 7 is an enlarged side view showing a main part of the third embodiment.

8 is a sectional view taken along the line II-II in FIG.

FIG. 9 is a schematic perspective view showing a fourth embodiment of the heat exchange device of the present invention.

FIG. 10 is a schematic perspective view showing another arrangement example of the fourth embodiment.

FIG. 11 is a schematic perspective view showing a fifth embodiment of the heat exchange device of the present invention.

FIG. 12 is a schematic perspective view showing another arrangement example of the fifth embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Air-conditioning condenser 2 High temperature side condenser 3 Low temperature side condenser 4 Radiator 5 Liquid receiver 11, 11A Inlet 12, 12A Outlet 13, 13A Header pipe 14, 14A Header pipe 15, 15A Heat exchange pipe 16, 16A Corrugated fin ( 31) Cooling part 32 Supercooling part 33, 34 Connection tube 51 Receiver main body 53 Upper fixed joint part 54 Lower fixed joint part Ta Width dimension of low-temperature side condenser Tb Width dimension of high-temperature side condenser A Air ( Heat exchange fluid)

Claims (6)

[Claims] 1. An integrated heat exchange device comprising: an air conditioning condenser for cooling and condensing a heat medium discharged from a compressor of a refrigeration cycle; and a radiator for cooling an internal combustion engine. The condenser is formed separately as a high-temperature condenser that cools the high-temperature and high-pressure gaseous heat medium, and a low-temperature condenser that further cools and condenses the heat medium discharged from the high-temperature condenser. A side-by-side integrated heat exchange device comprising the low-temperature condenser and a radiator arranged in order from the upstream side to the downstream side of the flow. 2. An integrated heat exchange device comprising: an air conditioning condenser for cooling and condensing a heat medium discharged from a compressor of a refrigeration cycle; and a radiator for cooling an internal combustion engine. The condenser is formed separately as a high-temperature condenser that cools the high-temperature and high-pressure gaseous heat medium, and a low-temperature condenser that further cools and condenses the heat medium discharged from the high-temperature condenser. The low-temperature condenser, the radiator, and the high-temperature condenser are arranged in order from the upstream side to the downstream side of the flow, and the high-temperature condenser and the low-temperature condenser are respectively laid between a pair of header pipes and the header pipes. And a plurality of heat exchange tubes parallel to each other, and heat exchange fins disposed between the heat exchange tubes. The heat exchanger fins in the low-temperature condenser have a width dimension in the flow direction of the heat exchange fluid in which the low-temperature condenser is thinner than the high-temperature condenser. Exchange equipment. 3. The side-by-side integrated heat exchanger according to claim 1, wherein the low-temperature side condenser includes a cooling part for the heat medium and a supercooling part for condensing the heat medium. Side-by-side integrated heat exchanger. 4. The side-by-side integrated heat exchange device according to claim 3, wherein a liquid receiver for separating a heat medium into gas and liquid is provided between the cooling unit and the supercooling unit. Side-by-side integrated heat exchanger. 5. The side-by-side integrated heat exchanger according to claim 4, wherein the liquid receiver is integrally joined to a header pipe of the low-temperature side condenser. 6. The side-by-side integrated heat exchanger according to claim 1, wherein the low-temperature side condenser is superimposed on substantially the entire surface of the radiator, or is superposed on the upper or lower part of the radiator. Side-by-side integrated heat exchange apparatus.