JP5985387B2 - Combined heat exchanger - Google Patents

Description

  The present invention relates to, for example, a vehicle-mounted composite heat exchanger, and more particularly, to a composite heat exchanger that can increase the area of a radiator section between a second heat exchanger and a third heat exchanger.

  The automobile has a first heat exchanger that exchanges heat between the first refrigerant and the second refrigerant, and second heat that exchanges heat between the first refrigerant flowing out of the first heat exchanger and the cooling air. A heat exchanger that exchanges heat between the second refrigerant and the cooling air, and flows the second refrigerant out to the first heat exchanger, the second heat exchanger and the third heat exchanger Are arranged adjacent to each other in the vertical direction with the longitudinal direction being the left-right direction (vehicle width direction) and the short direction being the vertical direction (vehicle height direction), and the first heat exchanger is One tank portion of the second heat exchanger and one tank of the third heat exchanger are positioned at the left and right ends of one tank portion of the second heat exchanger and one tank portion of the third heat exchanger. A composite heat exchanger that is mounted across the section is mounted (for example, see Patent Document 1).

JP2012-083014A

  In the conventional composite heat exchanger described above, the first heat exchanger is disposed at the end in the longitudinal direction (left-right direction) of the second heat exchanger and the third heat exchanger, so the length in the longitudinal direction is Is increased by the thickness of the first heat exchanger and the protruding length of the pipe protruding from the first heat exchanger in the left-right direction.

  Therefore, the width (length in the left-right direction) of the second heat exchanger and the third heat exchanger with respect to the mounting width on which the composite heat exchanger can be mounted is shortened, and the second heat exchanger and the third heat exchanger Since the width of the radiator portion was also shortened, the area (cooling effective area) of each radiator portion was narrowed and could not be efficiently cooled.

  The present invention has been made to solve the above-described disadvantages. The width (length in the left-right direction) between the second heat exchanger and the third heat exchanger is increased, and the width of each radiator section is also increased. Accordingly, the area (effective cooling area) of each radiator section is widened, and a composite heat exchanger in which cooling efficiency is improved is provided.

  A composite heat exchanger according to a first aspect of the present invention includes a first heat exchanger that exchanges heat between the first refrigerant and the second refrigerant, and the first refrigerant that flows out of the first heat exchanger and the cooling air. A second heat exchanger that exchanges heat between the second refrigerant and the cooling air, and a third heat exchanger that exchanges heat between the second refrigerant and the cooling air and flows the second refrigerant out to the first heat exchanger. A combined heat exchanger, wherein the second heat exchanger and the third heat exchanger are configured by a radiator part and tank parts positioned on the left and right sides of the radiator part, and the second heat exchanger, The third heat exchanger is disposed adjacent to the vertical direction, and the first heat exchanger is located upstream or downstream of the flow of the cooling air between the second heat exchanger and the third heat exchanger. On the side, both the radiator parts, one tank part of the second heat exchanger and one tank part of the second heat exchanger or Allowed span and one tank portion of the third heat exchanger positioned on the side, characterized in that attached.

  The composite heat exchanger according to a second aspect of the present invention is the composite heat exchanger according to the first aspect of the present invention, wherein the second heat exchanger is provided with a first refrigerant inlet and outlet at the one tank portion, The heat exchanger is characterized in that a second refrigerant inlet / outlet portion is provided in the one tank portion.

  The composite heat exchanger according to a third aspect of the present invention is the composite heat exchanger according to the second aspect, wherein the first heat exchanger is a flow of the cooling air between the second heat exchanger and the third heat exchanger. The first refrigerant inlet portion is disposed on the downstream side, and is provided in one tank portion of the second heat exchanger toward the flow direction of the cooling air, and the second refrigerant inlet and outlet portions are the third heat. It is provided in one tank part of the exchanger toward the flow direction of the cooling air.

  The composite heat exchanger according to a fourth aspect of the present invention is the composite heat exchanger according to claim 3, wherein the first refrigerant inlet, the outlet portion and the second refrigerant inlet, and the outlet portion of the first heat exchanger are the cooling air. It is provided in the direction of the flow.

  According to the composite heat exchanger of the first invention, the second heat exchanger and the third heat exchanger are arranged adjacent to each other in the vertical direction, and the first heat exchanger is connected to the second heat exchanger and the third heat exchanger. On the upstream side or downstream side of the flow of cooling air with the heat exchanger, a radiator portion of the second heat exchanger and the third heat exchanger, one tank portion of the second heat exchanger, and the third heat exchanger Since it was installed across one of the tank sections, the width (length in the left-right direction) of the second heat exchanger and the third heat exchanger with respect to the width capable of mounting the composite heat exchanger is increased. By increasing the width of each radiator portion, the area (cooling effective area) of each radiator portion is increased, and the cooling efficiency is improved.

  According to the composite heat exchanger of the second aspect of the invention, the second heat exchanger is provided with the first refrigerant inlet / outlet part in one tank part, and the third heat exchanger is provided with the second refrigerant in the one tank part. Since the refrigerant inlet / outlet portion is provided, the pipes are concentrated at one place, and the pipe handling performance and the pipe mounting workability are improved.

  According to the composite heat exchanger of the third invention, the first heat exchanger is disposed on the downstream side of the flow of the cooling air between the second heat exchanger and the third heat exchanger, and the first refrigerant inlet portion is the first refrigerant inlet. Two heat exchangers are provided in one tank portion in the direction of cooling air flow, and the second refrigerant inlet and outlet portions are provided in one tank portion of the third heat exchanger in the direction of cooling air flow. Therefore, piping is usually arranged downstream of the cooling air flow between the second heat exchanger and the third heat exchanger, so that the handling of the piping and the mounting workability of the piping are further improved. To do.

  According to the composite heat exchanger of the fourth aspect of the invention, the first refrigerant inlet, the outlet portion and the second refrigerant inlet, and the outlet portion of the first heat exchanger are provided in the cooling air flow direction. Since the piping is arranged on the downstream side of the flow of the cooling air between the second heat exchanger and the third heat exchanger, the handling of the piping and the mounting workability of the piping are further improved.

It is the perspective view which looked at the composite heat exchanger which is one Example of this invention from the downstream (rear side) of the flow of cooling air. FIG. 2 is a partially exploded perspective view of the composite heat exchanger shown in FIG. 1. FIG. 3 is a partial exploded perspective view of a disassembled portion of the composite heat exchanger illustrated in FIG. 2 as viewed from the upstream side (front side) of the flow of cooling air. It is the fragmentary view which looked at the principal part of the composite-type heat exchanger shown in FIG. 1 from the upstream (front side) of the flow of cooling air. It is explanatory drawing which shows the relationship between the mounting width which can mount a composite heat exchanger, and the width | variety of a radiator part. 1 is a configuration diagram of a vehicle heat exchange system to which a composite heat exchanger of the present invention is applied. It is a partial exploded perspective view of the 1st heat exchanger shown in FIG. It is explanatory drawing which shows the junction part of a 1st plate and a 2nd plate. FIG. 4 is a partially exploded perspective view similar to FIG. 3 showing a composite heat exchanger according to another embodiment of the present invention. FIG. 5 is a partially exploded perspective view similar to FIG. 3 showing a composite heat exchanger according to still another embodiment of the present invention.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a perspective view of a composite heat exchanger according to an embodiment of the present invention as viewed from the downstream side (rear (back) side) of the flow of cooling air, and FIG. 2 is a composite heat exchanger shown in FIG. 3 is a partially exploded perspective view, FIG. 3 is a partially exploded perspective view of the exploded portion of the composite heat exchanger shown in FIG. 2 as viewed from the upstream side (front (front side) side) of the flow of cooling air, and FIG. Fig. 5 is a partial view of the main part of the combined heat exchanger shown in Fig. 5 as viewed from the upstream side (front (front) side) of the cooling air flow. Fig. 5 shows the mounting width and the width of the radiator section where the combined heat exchanger can be mounted. FIG. 6 is a configuration diagram of a vehicle heat exchange system to which the composite heat exchanger of the present invention is applied, and FIG. 7 is a partially exploded perspective view of the first heat exchanger shown in FIG. FIG. 8 is an explanatory view showing a joint portion between the first plate and the second plate.

  As shown in FIG. 6, a vehicle heat exchange system 1 to which the composite heat exchanger of the present invention is applied includes a main radiator (heat exchanger) 3 that cools cooling water of the engine 2, a water-cooled charge air cooler ( A sub-radiator (third heat exchanger) 7 that cools the refrigerant for water-cooled CAC 6, a water-cooled condenser (first heat exchanger) 8, and an air-cooled condenser (second heat exchange) that cools the refrigerant for vehicle interior air conditioning 11).

  The main radiator 3 is provided on the upstream side (front side) of the cooling air flow of the motor fan 5.

  The main radiator 3 has a plurality of tubes (not shown) through which cooling water for the engine 2 flows, and performs heat exchange with cooling air flowing outside the tubes.

  Cooling water for the engine 2 is circulated by the pump 4.

  The sub-radiator 7 is disposed on the upstream surface side of the cooling air flow of the main radiator 3 and in the upper half region of the main radiator 3.

  The sub-radiator 7 has a plurality of tubes (not shown) through which cooling water, which is the second refrigerant for the water-cooled charge air cooler 6, flows and exchanges heat with the cooling air flowing outside the tubes. .

  Cooling water for the water-cooled charge air cooler 6 is circulated by a pump 9.

  Since the air (intake air) supplied to the engine 2 is compressed by the turbo unit 12 using the exhaust gas and becomes high temperature, the high-temperature compressed air is cooled by the water-cooled charge air cooler 6.

  As described above, since the air density supplied to the engine 2 can be improved by cooling the intake air, the combustion efficiency of the engine 2 is improved.

  That is, the water-cooled charge air cooler 6 exchanges heat between the compressed intake air supplied to the engine 2 and the cooling water to cool the intake air of the engine 2.

  The air-cooling condenser 11 is disposed on the upstream surface side of the cooling air flow of the main radiator 3 and in the lower half region of the main radiator 3.

  The air-cooling condenser 11 has a plurality of tubes (not shown) through which the air-conditioning refrigerant that is the first refrigerant flows, and performs heat exchange with the cooling air flowing outside the tubes.

  Next, the water-cooled condenser 8 will be described.

  The water-cooled condenser 8 and the air-cooled condenser 11 are connected in series in the refrigeration cycle with the water-cooled condenser 8 as the upstream.

  The air-conditioning refrigerant, which is the first refrigerant at high temperature and high pressure by the compressor (compressor) 10 in the refrigeration cycle, first flows into the water-cooled condenser 8 and then flows out into the air-cooled condenser 11.

  The cooling water that is the second refrigerant cooled by the sub-radiator 7 flows into the water-cooled condenser 8, exchanges heat with the air-conditioning refrigerant, and then flows into the water-cooled charge air cooler 6.

  As shown in FIG. 7 or 8, the water-cooled condenser 8 includes first plates 81 and second plates 82 that are alternately stacked, and first and second plates 82 that are alternately interposed between the first plate 81 and the second plate 82. A spacer 83, a second spacer 84, and an inner fin 86 whose outer periphery is surrounded by the first spacer 83 are provided.

  These parts are fixed by brazing on all contact surfaces.

  The first plate 81 and the second plate 82 have outer peripheral walls 811 and 821 that protrude in the same direction in the stacking direction, and adjacent outer peripheral walls 811 and 821 are stepped portions 812 that come into contact with each other. , 822 are provided.

  Each of the plates 81 and 82 includes a plurality of beats (projections) 813 and 823 that protrude toward the second flow path 8b, which will be described later, and have tips that come into contact with each other. The contact surfaces of these beats 813 and 823 are also brazed. The

  The first plate 81 and the second plate 82 include a pair (two) of first communication holes 814 and 824 through which air-conditioning refrigerant flows, and a pair of (two) second communication holes 815 and 825 through which cooling water flows. Respectively.

  Between the first plate 81 and the second plate 82 adjacent to each other in an alternately stacked state, as shown by a solid line arrow in FIG. As indicated by the dashed arrows, the second flow paths 8b through which the cooling water flows are alternately provided.

  Of the first plate 81 and the second plate 82, annular projecting edge portions 814a and 824a around the first communication holes 814 and 824 project into the second flow path 8b, and the inside of the second flow path 8b. And are joined by brazing in an overlapping state.

  Similarly, the annular projecting edge portions 815a and 825a around the second communication holes 815 and 825 project into the first flow path 8a, and are brazed and joined in a state of overlapping with each other in the first flow path 8a. .

  Further, as shown in FIG. 8, the first plate 81 and the second plate 82 are brazed and joined in an overlapping state.

  As a result, the first communication holes 814 and 824 are opened in the first flow path 8a, and the second communication holes 815 and 825 are closed. The air-conditioning refrigerant that flows into the first flow paths 8a from the first communication holes 814 and 824 and flows through the first flow paths 8a flows out of the other first communication holes 814 and 824, respectively.

  On the other hand, in the second flow path 8b, the second communication holes 815 and 825 are opened, and the first communication holes 814 and 824 are closed. The cooling water that flows into the second flow paths 8b from the two communication holes 815 and 825 and flows through the second flow paths 8b flows out of the other second communication holes 815 and 825, respectively.

  The contact surfaces of the inner fins 86 and the plates 81 and 82 are also brazed.

  The first spacer 83 is disposed in the first flow path 8a.

  The first spacer 83 includes a pair (two pieces) provided at positions corresponding to the fin housing openings 831 for housing the inner fins 86 and the pair (two) first communication holes 814 and 824 of the plates 81 and 82. ) First communication holes 832 and a pair (two) second communication holes 833 provided at positions corresponding to the pair (two) second communication holes 815 and 825 of the plates 81 and 82. doing.

  The first spacer 83 is disposed so as to surround the entire circumference of the inner fin 86.

  Each first communication hole 832 is open to the fin housing opening 831.

  As a result, the air conditioning refrigerant can flow into and out of the first flow path 8a, but does not flow in the both end directions from the positions of the first communication holes 814 and 824.

  Each of the second communication holes 833 is provided with a larger diameter than the protruding edge portions 815 a and 825 a around the second communication holes 815 and 825 of the plates 81 and 82.

  Thus, the first spacer 83 is disposed so as to surround the protruding edge portions 815a and 825a of the second communication holes 815 and 825.

  The second spacer 84 is disposed in the second flow path 8b.

  The second spacer 84 has an annular shape.

  The second spacer 84 is disposed at a corresponding position around the pair of first communication holes 814 and 824 of the plates 81 and 82.

  The inner diameter of the second spacer 84 is larger than the protruding edges 814 a and 824 a around the first communication holes 814 and 824 of the plates 81 and 82.

  Accordingly, the second spacer 84 is disposed so as to surround the protruding edge portions 814a and 824a of the first communication holes 814 and 824.

  In the above-described configuration, the air-conditioning refrigerant that has been changed to a high-temperature and high-pressure gas state by the compressor 10 of the refrigeration cycle is firstly connected to one first communication hole 814 of the water-cooled condenser 8 via the first refrigerant inlet portion of the water-cooled condenser 8. 824, 832.

  Thereafter, the air-conditioning refrigerant flows through the first flow path 8a between the first plate 81 and the second plate 82, and the air-cooled condenser from the other first communication hole 814, 824, 832 through the first refrigerant outlet. 11 will flow out.

  On the other hand, the cooling water cooled by the sub-radiator 7 flows into one of the second communication holes 815, 825, and 833 of the water-cooled condenser 8 through the second refrigerant inlet of the water-cooled condenser 8.

  Thereafter, it flows through the second flow path 8b between the first plate 81 and the second plate 82, flows out from the other second communication holes 815, 825, and 833 through the second refrigerant outlet, and passes through the pump 9. Then flows into the water-cooled charge air cooler 6.

  Next, a composite heat exchanger according to an embodiment of the present invention will be described with reference to FIGS.

  In FIG. 1, the composite heat exchanger 21 includes a first heat exchanger (water-cooled condenser) 8 that exchanges heat between the first refrigerant and the second refrigerant, and a first heat that flows out from the first heat exchanger 8. A second heat exchanger (air-cooled condenser) 11 that exchanges heat between the refrigerant (air-conditioning refrigerant) and the cooling air, heat exchange between the second refrigerant (cooling water) and the cooling air, A third heat exchanger (sub-radiator) 7 that flows out to the first heat exchanger 8 is provided.

  The first heat exchanger 8 described above includes a first flow path 8a (see FIG. 7), a first cylinder portion 8d as a first refrigerant inlet that allows the first refrigerant to flow into the first flow path 8a, A second channel 8b (see FIG. 7) that exchanges heat between the second tube 8e (see FIG. 2) serving as a first refrigerant outlet that allows the first refrigerant to flow out of the first channel 8a and the first channel 8a. And a third cylinder portion 8f as a second refrigerant inlet portion for allowing the second refrigerant to flow into the second flow path 8b, and a second refrigerant outlet portion for allowing the second refrigerant to flow out of the second flow path 8b. The fourth cylindrical portion 8g is provided.

  The first cylinder part 8d, the third cylinder part 8f, and the fourth cylinder part 8g described above are provided from the first heat exchanger 8 toward the rear side (downstream side of the cooling air flow), and the second cylinder part 8e is The first heat exchanger 8 is provided toward the front side (upstream side of the cooling air flow).

  The first heat exchanger 8 has a bracket 8h that protrudes rightward from the first tube portion 8d, a bracket 8j that protrudes downward from the second tube portion 8e, and protrudes upward and forward from the left end. A bracket 8l is provided.

  As shown in FIG. 1, the second heat exchanger 11 described above is arranged with the longitudinal direction being the left-right direction (vehicle width direction) and the short direction being the vertical direction (vehicle height direction), A second heat exchanger radiator section 11a, and a second heat exchanger first tank section 11b and a second heat exchanger second tank section 11c disposed on the left and right sides of the second heat exchanger radiator section 11a. It has been configured.

  And the 2nd heat exchanger 1st tank part 11b and the 2nd heat exchanger 2nd tank part 11c are each provided with the separator 11d in the same height position from the inside lower side.

  Therefore, the 2nd heat exchanger 11 is divided into two heat exchanger parts up and down by separator 11d.

  And the cylindrical recessed part 11e as a 1st refrigerant | coolant inlet part by which the 2nd cylinder part 8e of the 1st heat exchanger 8 is fittingly connected by the 2nd heat exchanger 1st tank part 11b (refer FIG. 2). Is provided on the upper side, and a cylindrical portion 11g as a first refrigerant outlet is provided on the lower left side.

  The cylindrical recess 11e described above is provided from the second heat exchanger first tank portion 11b toward the rear side, and the cylinder portion 11g is provided downward from the second heat exchanger first tank portion 11b. Yes.

  And the bracket 11h is provided in the position corresponding to the bracket 8j of the 1st heat exchanger 8 in the 2nd heat exchanger 1st tank part 11b.

  As shown in FIG. 1, the above-described second heat exchanger second tank portion 11 c is provided with a liquid tank 11 x connected to the upper and lower heat exchanger portions of the second heat exchanger 11.

  The liquid tank 11x is attached and fixed to the second heat exchanger second tank portion 11c by a hose band 31 and a bolt 32.

  Therefore, the heat exchanger part of the second heat exchanger 11 above the separator 11d acts as a condenser that condenses the first refrigerant flowing from the cylindrical recess 11e.

  Then, the first refrigerant condensed in the upper heat exchanger part flows into the liquid tank 11x.

  And the 1st refrigerant | coolant which flowed into the lower heat exchanger part of the 2nd heat exchanger 11 from the liquid tank 11x is cooled by the lower heat exchanger part which acts as a supercooling part, and flows out from the cylinder part 11g. To do.

  As shown in FIG. 1, the third heat exchanger 7 described above is configured so that the longitudinal direction is the left-right direction (vehicle width direction) and the short-side direction is the vertical direction (vehicle height direction). Arranged adjacent to the upper side of the exchanger 11, the third heat exchanger radiator portion 7a located above the second heat exchanger radiator portion 11a, and the left and right sides of the third heat exchanger radiator portion 7a. In addition, the third heat exchanger first tank portion 7b located above the second heat exchanger first tank portion 11b, and the third heat exchanger second located above the second heat exchanger second tank portion 11c. The tank portion 7c is provided.

  The third heat exchanger first tank part 7b is provided with a first cylinder part 7d as a second refrigerant inlet part on the upper side and a second cylinder part 7e as a second refrigerant outlet part on the lower side. It has been.

  The first cylinder part 7d and the second cylinder part 7e described above are provided from the third heat exchanger first tank part 7b toward the rear side.

  The third heat exchanger first tank portion 7b is provided with a separator 7f that partitions the interior into an upper first tank portion and a lower first tank portion.

  Accordingly, the third heat exchanger radiator portion 7a is divided into an upper radiator portion and a lower radiator portion by the separator 7f.

  The 2nd refrigerant | coolant (cooling water) which flowed into the 1st cylinder part 7d of this 3rd heat exchanger 7 is the 3rd heat exchanger radiator part 7a from the upper 1st tank part of the 3rd heat exchanger 1st tank part 7b. Flows into the upper radiator portion of the first heat exchanger and flows out into the third heat exchanger second tank portion 7c.

  The second refrigerant that has flowed into the third heat exchanger second tank portion 7c flows from the lower radiator portion of the third heat exchanger radiator portion 7a to the lower first tank portion of the third heat exchanger first tank portion 7b. And flows out from the second cylindrical portion 7e.

  And the bracket part 7g (refer FIG. 2) is provided in the position corresponding to the bracket 8l of the 1st heat exchanger 8 below the left end of the 3rd heat exchanger 1st tank part 7b.

  Next, an example of connection and assembly of the heat exchangers 8, 11, and 7 will be described.

  First, by fitting and connecting the second cylindrical portion 8e of the first heat exchanger 8 to the cylindrical concave portion 11e of the second heat exchanger 11, the brackets 8j and 11h are fastened with a fastener such as a bolt, The first heat exchanger 8 and the second heat exchanger 11 are connected.

  Next, one end side of the L-shaped connecting pipe 41 is fitted and connected to the third cylindrical portion 8 f of the first heat exchanger 8, and the other end side of the connecting pipe 41 is connected to the second side of the third heat exchanger 7. The first heat exchanger 8 and the third heat exchanger 7 are connected by fitting and connecting to the cylinder portion 7e and fastening the bracket 8l and the bracket portion 7g with a fastener such as a bolt.

  Then, both the second tank portions 11c and 7c of the second heat exchanger 11 and the third heat exchanger 7 are fastened together by using a fastener such as a bolt 32 or a connecting bracket 33, so that the second heat When the exchanger 11 and the third heat exchanger 7 are connected, the heat exchangers 8, 11, and 7 are connected and assembled as shown in FIG.

  In addition, when connecting the 2nd heat exchanger 11 and the 3rd heat exchanger 7, the liquid tank 11x is also attached.

Thus, when each heat exchanger 8, 11, 7 is assembled, as shown in FIG. 5A, the rear side of the second heat exchanger 11 and the third heat exchanger 7 (the flow of the cooling air) The first heat exchanger 8 is located on the downstream side, and the width (the length in the left-right direction) of the second heat exchanger 11 and the third heat exchanger 7 with respect to the width L on which the composite heat exchanger 21 can be mounted. is) and the longer the radiator unit 11a, the width _{L 1} of 7a becomes longer.

On the other hand, when the first heat exchanger 8 is disposed at the longitudinal ends of the second heat exchanger 11 and the third heat exchanger 7 as in the conventional example shown in FIG. The width of the second heat exchanger 11 and the third heat exchanger 7 with respect to the width L on which the heat exchanger 21 can be mounted is shortened, and the width L ₂ (L ₂ <L ₁ ) of each radiator portion 11a, 7a is also shortened. .

  Since the operation of the composite heat exchanger 21 has been described above, a description thereof will be omitted.

As described above, according to the composite heat exchanger 21 of one embodiment of the present invention, the second heat exchanger 11 and the third heat exchanger 7 are arranged adjacent to each other in the vertical direction, and the first heat exchange is performed. On the downstream side of the flow of cooling air between the second heat exchanger 11 and the third heat exchanger 7, and the radiator portions 11 a and 7 a of the second heat exchanger 11 and the third heat exchanger 7. Since it is mounted across the second heat exchanger first tank portion 11b of the second heat exchanger 11 and the third heat exchanger first tank portion 7b of the third heat exchanger 7, it is combined heat exchange the second heat exchanger 11 and the third width of the heat exchanger 7 (the left-right length) is lengthened by the radiator portions 11a to width L can be mounted to the vessel 21, the width L ₁ of 7a by also increases In addition, the area (cooling effective area) of each of the radiator portions 11a and 7a is increased, and the cooling efficiency is improved.

  Further, the second heat exchanger 11 is provided with a cylindrical recess (first refrigerant inlet portion) 11e and a cylindrical portion (first refrigerant outlet portion) 11g in the second heat exchanger first tank portion 11b, so that the third heat The exchanger 7 is provided with a first cylinder part (second refrigerant inlet part) 7d and a second cylinder part (second refrigerant outlet part) 7e in the third heat exchanger first tank part 7b. Concentrates in one place, improving pipe handling and piping installation workability.

  In addition, the first cylinder part (first refrigerant inlet part) 8d, the third cylinder part (second refrigerant inlet part) 8f, and the fourth cylinder part (second refrigerant outlet part) 8g provide cooling air to the first heat exchanger 8. The cylindrical recess (first refrigerant inlet portion) 11e is provided in the second heat exchanger first tank portion 11b of the second heat exchanger 11 so that the cooling air is directed toward the flow direction (downstream of the cooling air flow). The first cylinder part (second refrigerant inlet part) 7d and the second cylinder part (second refrigerant outlet part) 7e are provided in the third heat exchanger 7 toward the flow direction (downstream of the cooling air flow). Is provided in the third heat exchanger first tank portion 7b in the direction of the flow of the cooling air (downstream of the flow of the cooling air). Therefore, normally, on the rear side of each of the heat exchangers 8, 11, and 7. Since the piping is arranged, the handling of the piping and the mounting workability of the piping are further improved.

  Moreover, since the 3rd cylinder part 8f of the 1st heat exchanger 8 and the 2nd cylinder part 7e of the 3rd heat exchanger 7 are connected by the connection pipe 41, the 1st heat exchanger 8 and the 3rd heat Even if the exchanger 7 has a dimensional error, a mounting error, etc., and the positions of the third cylindrical portion 8f and the second cylindrical portion 7e are shifted, the third cylindrical portion 8f and the second cylindrical portion 7e can be easily connected by the connecting pipe 41 In addition, it can be connected with good workability.

  Moreover, since the 2nd cylinder part 8e of the 1st heat exchanger 8 is directly attached to the cylindrical recessed part 11e of the 2nd heat exchanger 11, the piping which connects the heat exchangers 8 and 11 can be decreased.

  Next, a composite heat exchanger according to another embodiment of the present invention will be described with reference to FIG. 9 which is a partially exploded perspective view similar to FIG.

  The composite heat exchanger 21 of the embodiment shown in FIG. 9 is different from the composite heat exchanger 21 of the embodiment shown in FIGS. 1 to 4 in that the third tube portion 8 f is located on the front side of the first heat exchanger 8. A tube in which the third tube portion 8f is fitted and connected to the point provided toward the upstream side of the cooling air flow and the third heat exchanger first tank portion 7b of the third heat exchanger 7. The point is that the concave portion 7h is provided as the second refrigerant outlet portion.

  According to the composite heat exchanger 21 of the embodiment shown in FIG. 9, the same effects as those of the composite heat exchanger 21 shown in FIGS.

  Furthermore, since the 3rd cylinder part 8f of the 1st heat exchanger 8 is directly attached to the cylindrical recessed part 7h of the 3rd heat exchanger 7, the piping which connects each heat exchanger 8 and 7 can be decreased.

  Next, a composite heat exchanger according to still another embodiment of the present invention will be described with reference to FIG. 10 which is a partially exploded perspective view similar to FIG.

  The composite heat exchanger 21 of the embodiment shown in FIG. 10 is different from the composite heat exchanger 21 of the embodiment shown in FIGS. 1 to 4 in that the heat exchangers 8, 11 and 7 are connected and fixed. Therefore, the connection bracket 8p is provided in the first heat exchanger 8, the connection bracket 11p connected to the connection bracket 8p is provided in the second heat exchanger 11, and the connection bracket 7p connected to the connection bracket 8p is the third. This is a point provided in the heat exchanger 7.

  According to the composite heat exchanger 21 of the embodiment shown in FIG. 10, the same effects as those of the composite heat exchanger 21 shown in FIGS. 1 to 4 can be obtained.

  Furthermore, since each heat exchanger 8,11,7 is connected and fixed by connection bracket 8p, 11p, 7p, each heat exchanger 8,11,7 can be connected and fixed firmly.

  In the above-described embodiment, the example in which the second heat exchanger 11 is disposed on the lower side in the vertical direction and the third heat exchanger 7 is disposed on the upper side of the second heat exchanger 11 has been described. It is good also as a structure which arrange | positions the apparatus 7 below the up-down direction, and arrange | positions the 2nd heat exchanger 11 above the 3rd heat exchanger 7. FIG.

  Moreover, although the example which attached the 1st heat exchanger 8 to the downstream (rear side) of the flow of the cooling air of the 2nd heat exchanger 11 and the 3rd heat exchanger 7 was shown, the 1st heat exchanger 8 may be configured to be attached to the upstream side (front side) of the flow of the cooling air between the second heat exchanger 11 and the third heat exchanger 7.

  Moreover, although the 2nd heat exchanger 11 and the 3rd heat exchanger 7 were shown as the 2-pass type | mold which has a radiator part up and down, the 2nd heat exchanger 11 and the 3rd heat exchanger 7 were shown. A one-pass configuration in which the refrigerant flows from one tank part to the other tank part may be employed.

  Moreover, although the cylinder part 11g was shown facing down, it is good also as a structure which orient | assigned the cylinder part 11g to the flow direction of cooling air, especially the downstream (back side) of the flow of cooling air.

7 Third heat exchanger (sub-radiator)
7a 3rd heat exchanger radiator part 7b 3rd heat exchanger 1st tank part 7c 3rd heat exchanger 2nd tank part 7d 1st cylinder part (2nd refrigerant | coolant inlet part)
7e Second cylinder (second refrigerant outlet)
7f Separator 7g Bracket 7h Cylindrical recess (second refrigerant outlet)
7p connecting bracket 8 1st heat exchanger (water-cooled condenser)
8a 1st flow path 8b 2nd flow path 8d 1st cylinder part (1st refrigerant | coolant inlet part)
8e Second cylinder (first refrigerant outlet)
8f 3rd cylinder part (2nd refrigerant | coolant inlet part)
8g Fourth cylinder (second refrigerant outlet)
8h Bracket 8j Bracket 8l Bracket 8p Connection bracket 81 First plate 82 Second plate 86 Inner fin 11 Second heat exchanger (air-cooled condenser)
11a 2nd heat exchanger radiator part 11b 2nd heat exchanger 1st tank part 11c 2nd heat exchanger 2nd tank part 11d Separator 11e Cylindrical recessed part (1st refrigerant | coolant inlet part)
11g cylinder (first refrigerant outlet)
11h Bracket 11p Connection bracket 11x Liquid tank 21 Combined heat exchanger 41 Connecting pipe

Claims (4)

Heat exchange is performed between the first heat exchanger (8) for exchanging heat between the first refrigerant and the second refrigerant, and the first refrigerant flowing out of the first heat exchanger (8) and the cooling air. Heat exchange between the second heat exchanger (11) and the second refrigerant and the cooling air, and the third heat exchanger (7) for flowing the second refrigerant to the first heat exchanger (8) A combined heat exchanger (21) comprising:
The second heat exchanger (11) and the third heat exchanger (7) include a radiator section (11a, 7a) and tank sections (11b, 11c, 7b, 7c),
The second heat exchanger (11) and the third heat exchanger (7) are disposed adjacent to each other in the vertical direction,
The first heat exchanger (8) is connected to the two radiator portions (on the upstream side or the downstream side of the cooling air flow between the second heat exchanger (11) and the third heat exchanger (7). 11a, 7a) and one tank part (11b) of the second heat exchanger (11) and one tank part (11b) of the second heat exchanger (11). Attached across one tank part (7b) of the third heat exchanger (7),
A composite heat exchanger (21) characterized by the above. The combined heat exchanger (21) according to claim 1,
The second heat exchanger (11) is provided with a first refrigerant inlet and outlet (11e, 11g) in the one tank part (11b),
The third heat exchanger (7) is provided with a second refrigerant inlet and outlet (7d, 7e, 7h) in the one tank part (7b).
A composite heat exchanger (21) characterized by the above. In the combined heat exchanger (21) according to claim 2,
The first heat exchanger (8) is arranged on the downstream side of the cooling air flow between the second heat exchanger (11) and the third heat exchanger (7);
The first refrigerant inlet portion (11e) is provided in one tank portion (11b) of the second heat exchanger (11) in the flow direction of the cooling air,
The second refrigerant inlet and outlet portions (7d, 7e, 7h) are provided in one tank portion (7b) of the third heat exchanger (7) in the direction of the cooling air flow,
A composite heat exchanger (21) characterized by the above. In the combined heat exchanger (21) according to claim 3,
The first refrigerant inlet / outlet part (8d, 8e) and the second refrigerant inlet / outlet part (8f, 8g) of the first heat exchanger (8) are provided toward the flow direction of the cooling air,
A composite heat exchanger (21) characterized by the above.

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