JP2009014274A - Heat exchanger - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat exchanger, enabling a refrigerant to smoothly flow from a refrigerant inflow port to a refrigerant outflow port in a receiver. <P>SOLUTION: This heat exchanger includes: the receiver 7; and a desiccant unit 8 having a desiccant storing bag 46 containing a desiccant 45 and a holding frame 47. The receiver 8 is provided with the refrigerant inflow port 32 and the refrigerant outflow port 33, which are formed so that the former is located above the latter, and a partition member 34 partitioning the inside of the receiver 7 into both upper and lower parts 7A, 7B in a position of height of the refrigerant inflow port 32 and the refrigerant outflow port 33 in the receiver 7. A communicating hole 42 for communicating both upper and lower parts 7A, 7B to each other is formed in the partition member 34. A desiccant unit 8 is disposed in the upper part 7A. A support part 35 is provided on the partition member 34 to project upward. The lower end of the holding frame 47 of the desiccant unit 8 is put on the support part 35, thereby preventing the upper end opening of the communicating hole 42 of the partition member 34 from being closed by the desiccant unit 8. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a heat exchanger used in, for example, a refrigeration cycle constituting a car air conditioner.

  In this specification and claims, the top and bottom of FIG.

  In recent years, condensers of a refrigeration cycle constituting a car air conditioner are, for example, spaced apart from each other for the purpose of improving assembling to a vehicle body, saving installation space, and improving the refrigeration capacity of a refrigeration cycle. A pair of tanks extending in the up-down direction, and a plurality of heat exchange tubes arranged in parallel with a space between the tanks in the vertical direction and having both ends connected to the tanks, respectively. A fin disposed between the matching heat exchange tubes, a tubular liquid receiver extending in the vertical direction attached to one of the first tanks, and a desiccant unit disposed in the liquid receiver. Both tanks are partitioned into two headers in the length direction of the tank by partition walls provided at the same height, and have a function as a capacitor in the upper part of both partition walls. A contraction part is provided, and a supercooling part having a function as a supercooler is provided at a lower part than both partition walls. The liquid receiver has a refrigerant inlet and a refrigerant outlet, and the former is upward. The desiccant unit is formed of a rigid bowl-shaped desiccant container and a desiccant filled in the desiccant container. An annular rib portion extending over the entire circumference is integrally provided, and the rib portion is formed in an annular holding groove formed at a height position between the refrigerant inlet and the refrigerant outlet on the inner peripheral surface of the liquid receiver. Is inserted into the receiver, the desiccant unit is fixed in the receiver, and the refrigerant flowing out from the first tank side header of the condensing unit enters the receiver through the refrigerant inlet, in the desiccant unit. After flowing between the desiccant in the desiccant container, the receiver Heat exchanger flows out from the refrigerant outlet port is adapted to flow into the first tank side of the header of the subcooling portion is known (see Patent Document 1).

However, in the heat exchanger described in Patent Document 1, the refrigerant that has flowed out of the first tank side header of the condensing unit enters the liquid receiver through the refrigerant inlet and is dried in the desiccant container in the desiccant unit. After flowing between the agents, it flows out from the refrigerant outlet of the liquid receiver and flows into the header on the first tank side of the supercooling part, so that the desiccant becomes the resistance of the refrigerant flow, The passage resistance when the refrigerant flows between the desiccant in the desiccant container in the desiccant unit is increased. Therefore, there is a problem that the smooth flow of the refrigerant from the refrigerant inlet to the refrigerant outlet in the liquid receiver is hindered, and the performance of the car air conditioner is deteriorated.
European Patent Application No. 1764569

  An object of the present invention is to provide a heat exchanger that solves the above problems and allows the refrigerant to flow smoothly from the refrigerant inlet to the refrigerant outlet in the liquid receiver as compared to the heat exchanger described in Patent Document 1. It is in.

  In order to achieve the above object, the present invention comprises the following aspects.

1) A pair of tanks extending in the vertical direction spaced apart from each other, and a plurality of heats arranged in parallel with a space in the vertical direction between the tanks and both ends connected to both tanks. An exchange pipe, fins arranged between adjacent heat exchange pipes, a cylindrical liquid receiver attached to one of the first tanks and extending in the vertical direction, and a desiccant unit arranged in the liquid receiver In the heat exchanger in which the refrigerant inlet and the refrigerant outlet are formed in the liquid receiver so that the former is positioned above,
A partition member that divides the interior of the liquid receiver into upper and lower side portions is disposed at a height position between the refrigerant inlet and the refrigerant outlet in the receiver, and the upper and lower portions of the partition member are passed through the partition member. The communication hole is formed, and the desiccant unit includes a desiccant container that contains the desiccant and a holding frame that holds the desiccant container. The desiccant unit is located above the partition member in the liquid receiver. The desiccant unit is supported in a lifted state between the partition member and the desiccant unit holding frame to prevent the upper end opening of the communication hole of the partition member from being blocked by the desiccant unit. A heat exchanger provided with a support.

  2) The heat exchanger according to 1), wherein the support part is formed in an upward projecting shape at the center of the partition member, and the lower end of the holding frame of the desiccant unit is placed on the support part.

  3) The support part is cylindrical, and a plurality of concave grooves extending upward from the lower end of the support part and opening at the upper end face of the support part are formed on the peripheral surface of the support part at intervals in the circumferential direction. The heat exchanger according to 2) above, wherein the communication hole is opened on the upper surface of the partition member so that a part of the upper end thereof is located in the concave groove of the support portion.

  4) The support portion is cylindrical, and a plurality of recesses extending from the lower end of the support portion to the vicinity of the upper end portion are formed at intervals in the circumferential direction on the peripheral surface of the support portion, and the upper end of the communication hole is The heat exchanger as described in 2) above, wherein an opening is formed on the upper surface of the partition member so that a part thereof is located in the recess of the support portion.

  5) The support part is formed in a downward projecting shape at the lower end of the holding frame of the desiccant unit, the support part is placed on the upper surface of the partition member, and the support part of the holding frame in the partition member is placed The heat exchanger as described in 1) above, wherein the upper end of the communication hole is opened in a portion excluding the mounted portion.

  6) The heat exchanger according to 5) above, wherein the upper end of the communication hole is opened in the partition member at an interval around the placement portion.

  7) The communication hole is composed of one large hole portion extending upward from the lower end surface of the partition member and a plurality of small hole portions connected to the upper end portion of the large hole portion, and the upper end of the small hole portion is opened on the upper surface of the partition member. The heat exchanger according to any one of 3) to 6) above.

  8) The first tank to which the liquid receiver is attached is partitioned into two headers in the length direction of the first tank by the first partition wall, and the other second tank is also partitioned by the second partition wall. Condensed into two headers in the length direction of the second tank, both partition walls are in the same position with respect to the length direction of both tanks, and functions as a condenser in the upper part of both partition walls And a supercooling part having a function as a supercooler is provided in the lower part of both partition walls, and the refrigerant flowing out from the first tank side header of the condensing part passes through the refrigerant inlet. The refrigerant that enters the liquid receiver and flows out from the refrigerant outlet of the liquid receiver flows into the header on the first tank side of the supercooling section. The described heat exchanger.

  According to the heat exchanger of 1) above, the partition member that divides the interior of the liquid receiver into upper and lower side portions is arranged at a height position between the refrigerant inlet and the refrigerant outlet in the liquid receiver. The member is formed with a communication hole that passes through the upper and lower side portions of the partition member, and the desiccant unit includes a desiccant container that contains the desiccant and a holding frame that holds the desiccant container. Is disposed in the upper part of the partition member in the liquid receiver, and is supported between the partition member and the holding frame of the desiccant unit in a state where the desiccant unit is lifted, and the communication hole of the partition member by the desiccant unit Since the support part for preventing the upper end opening of the liquid crystal from being blocked is provided, the refrigerant flows from the upper part to the lower part from the upper part of the partition member in the liquid receiver to the lower part. Agent unit in the receiver It should not be to the resistance of the medium flow. Therefore, compared with the heat exchanger described in Patent Document 1, the refrigerant flows smoothly from the refrigerant inlet to the refrigerant outlet in the receiver, and the performance of the car air conditioner using this heat exchanger is improved. A decrease can be prevented.

  According to the heat exchangers 2) to 4) above, the drying agent unit can be reliably supported by the support portion of the partition member in a lifted state.

  According to the heat exchanger of 5) above, the desiccant unit can be reliably supported in the lifted state by the support portion of the holding frame of the desiccant unit.

  According to the heat exchanger of 8) above, the desiccant unit does not provide resistance to refrigerant flow in the liquid receiver. Therefore, the refrigerant at the time of entering the liquid receiver from the first tank side header of the condensing unit through the refrigerant inlet and flowing into the first tank side header of the supercooling unit through the refrigerant outlet of the receiver. As a result, the deterioration of the performance of the car air conditioner using this heat exchanger can be prevented.

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

  In this embodiment, the heat exchanger according to the present invention is applied to a heat exchanger in which a condensing part having a condenser function and a supercooling part having a supercooler function are integrated.

  In the following description, the left and right sides in FIG. 1 are referred to as the left and right sides, and the front side of FIG.

  In addition, the same code | symbol is attached | subjected to the same part and the same thing through all drawings, and the overlapping description is abbreviate | omitted.

  FIG. 1 shows the overall configuration of the heat exchanger, and FIGS. 2 to 5 show the configuration of the main part thereof.

  In the following description, the term “aluminum” includes aluminum alloys in addition to pure aluminum.

  In FIG. 1, the heat exchanger (1) has a width between a pair of left and right aluminum tanks (2) and (3) extending in the vertical direction and spaced apart from each other, and both tanks (2) and (3). A plurality of flat aluminum heat exchange tubes (4) with their directions directed in the front-rear direction and arranged in parallel at intervals in the vertical direction, and both left and right ends connected to both tanks (2) (3), respectively And an aluminum corrugated fin (5) brazed to the heat exchange pipe (4) between the adjacent heat exchange pipes (4) and outside the heat exchange pipes (4) at both upper and lower ends, and A pair of upper and lower aluminum side plates (6) disposed outside the corrugated fin (5) and brazed to the corrugated fin (5), and a receiver (7) fixed to the left tank (2) And a desiccant unit (8) disposed in the liquid receiver (7). Here, the left tank (2) is the first tank to which the liquid receiver (7) is attached, and the right tank (3) is the other second tank.

  Both tanks (2) and (3) of the heat exchanger (1) are divided vertically by partition walls (9) and (11) at the same height at the bottom, thereby condensing the gas-phase refrigerant. Function of the condenser (12) having the function of a condenser to be a liquid phase, and the function of the supercooler for supercooling the liquid refrigerant condensed in the condenser (12) to a temperature lower by about 5 to 15 ° C. than the condensation temperature And a supercooling section (13) having a vertical line in the same vertical plane.

  Here, the part above the partition wall (9) in the left tank (2) is the left header (14) of the condensing part (12), and the part above the partition wall (11) in the right tank (3) Is the right header (15) of the condenser (12). Further, the part below the partition wall (9) in the left tank (2) is the left header (16) of the supercooling section (13), and the part below the partition wall (11) in the right tank (3) Is the right header (17) of the supercooling section (13).

  The right header (15) of the condensing part (12) is divided into an upper header part (15a) and a lower header by an aluminum first partition plate (18) for forming a passage group provided at a middle height position in the vertical direction. The left header (14) is divided by an aluminum second partition plate (19) for passage group formation provided at a lower position than the first partition plate (18). The upper header portion (14a) and the lower header portion (14b) are partitioned. The condensing part (12) is divided into a part above the first partition plate (18), a part between the partition plates (18) and (19), and a part below the second partition plate (19), respectively. A passage group (21), (22), (23) is provided which is composed of heat exchange pipes (4) arranged continuously in the vertical direction. The number of heat exchange pipes (4) constituting each of the passage groups (21), (22), and (23) decreases sequentially from the top. Further, the flow direction of the refrigerant in all the heat exchange pipes (4) constituting each passage group (21), (22), and (23) is the same, and two adjacent passage groups (21) (22) And the flow directions of the refrigerant in the heat exchange pipe (4) of (22) and (23) are different.

  An aluminum refrigerant inlet member (24) leading to a refrigerant inlet (not shown) is brazed to the upper end portion of the upper header portion (15a) of the right header (15) of the condensing portion (12). An aluminum refrigerant outlet member (25) that leads to a refrigerant outlet (not shown) is brazed to the right header (17) of the supercooling section (13).

  The liquid receiver (7) is joined to a cylindrical liquid receiver body (26) whose upper and lower ends are open and a lower end of the liquid receiver body (26), and the lower end opening of the receiver body (26) is closed. A lower cap (27), and an upper cap (28) that is detachably attached to the upper end of the receiver body (26) and closes the upper end opening of the receiver body (26). The liquid receiver (7) is connected to the refrigerant inlet pipe (29) for sending the refrigerant from the lower header section (14b) of the condenser left header (14) into the liquid receiver (7), and from the liquid receiver (7). The refrigerant is fixed to the left tank (2) via a refrigerant outflow pipe (31) that sends out the refrigerant into the left header (16). One end of the refrigerant inflow pipe (29) is inserted into the liquid receiver body (26) in a state of being inserted into the refrigerant inlet (32) formed in the liquid receiver body (26) of the liquid receiver (7). The other end is joined to the left tank (2) in a state of being inserted into the refrigerant outlet formed in the lower header part (14b) of the condensing part left header (14) (see FIG. 2). (Not shown). Further, one end of the refrigerant outflow pipe (31) has a refrigerant outlet (33) formed at a height lower than the refrigerant inlet (32) in the liquid receiver body (26) of the liquid receiver (7). ) Inserted into the receiver body (26) (see FIG. 2), and the other end is inserted into the refrigerant inlet formed in the subcooler left header (16) and left It is joined to the tank (2) (not shown).

  As shown in FIG. 2 to FIG. 5, the liquid receiver (7) is moved up and down on the height position between the refrigerant inlet (32) and the refrigerant outlet (33) in the liquid receiver (7). A synthetic resin partition member (34) for partitioning into portions (7A) and (7B) is disposed. The partition member (34) has a disk shape, and a columnar support portion (35) protruding upward is formed concentrically and integrally at the center of the upper surface thereof. On the lower surface of the partition member (34), a columnar downward projecting portion (36) is integrally formed concentrically with the partition member (34). An annular groove (37) is formed on the outer peripheral surface of the partition member (34) over the entire circumference, and an O-ring (38) is fitted in the annular groove (37). Thus, the space between the inner peripheral surface of the liquid receiver body (26) and the peripheral edge portion of the partition member (34) is sealed. The circumferential surface of the support portion (35) has a plurality of cross-sectional arc-shaped concave grooves (39) extending upward from the lower end of the support portion (35) and having an upper end opened to the upper end surface of the support portion (35). It is formed at intervals in the circumferential direction so as to be positioned on the circumference. A strainer (41) is attached to the downward projecting portion (36) of the partition member (34). The strainer (41) is placed on the lower cap (27) of the liquid receiver (7). And by the action of the O-ring (38) interposed between the partition member (34) and the inner peripheral surface of the receiver body (26), and the strainer (41) placed on the lower cap (27) The height position of the partition member (34) is determined.

  The partition member (34) is formed with a communication hole (42) through which both upper and lower portions in the liquid receiver (7) are passed. The communication hole (42) has one cylindrical large hole portion (43) extending upward from the lower end surface of the downward projecting portion (36) of the partition member (34) and having the upper end reaching the lower end portion of the support portion (35). A plurality of openings that are continuous with the upper end of the peripheral edge of the large hole portion (43) and that extend radially outward from the large hole portion (43) and have an upper end opened on the upper surface of the partition member (34). And a cylindrical small hole portion (44). The upper end surface of the large hole portion (43) is a conical surface with a central portion recessed upward. The radially inner portion of the upper end opening of the small hole portion (44) is located in the concave groove (39) of the support portion (35).

  The desiccant unit (8) includes a desiccant-containing bag (46) (desiccant container) formed of a material having air permeability and liquid permeability, for example, a synthetic resin nonwoven fabric and containing the desiccant (45). An aluminum holding frame (47) that holds the desiccant-containing bag (46) is provided, and is disposed in an upper part (7A) of the partition member (34) in the liquid receiver (7). The holding frame (47) has a pair of left and right band plate-like side frames (48) arranged in the vertical direction and facing the width direction in the front-rear direction, and the lower ends of both side frame portions (48). A plate-like lower frame portion (49) that integrally connects, and a belt-like front frame portion (51) integrally formed in a leftward projecting manner on the front edge of the right side frame portion (48), A rear frame part (52) integrally formed in a rightward projecting manner at the rear edge of the left side frame part (48), and the other side frame part (48) at the upper end of each side frame part (48) The upper frame portion (53) is formed of two protruding pieces (53a) that are integrally formed so as to protrude to the side, and the tip portions are in contact with each other. The upper projecting portion (54) is integrally formed and joined to each other. The desiccant-containing bag (46) is disposed between the upper and lower frame portions (53) and (49) in a portion surrounded by the left and right side frame portions (48) and the front and rear frame portions (51) and (52). . Then, the lower frame portion (49) of the lower end of the holding frame (47) in the desiccant unit (8) is placed on the support portion (35) formed on the partition member (34). The unit (8) is supported by the support portion (35) in a lifted state so as not to block the upper end opening of the small hole portion (44) of the communication hole (42) of the partition member (34).

  The heat exchanger (1) constitutes a refrigeration cycle together with a compressor, an expansion valve (decompressor) and an evaporator, and is mounted on a vehicle as a car air conditioner.

  In the heat exchanger (1) described above, during operation of the refrigeration cycle, the high-temperature and high-pressure gas-liquid mixed phase refrigerant compressed by the compressor passes through the inlet member (24) from the refrigerant inlet (not shown) to the condenser (12). It flows into the upper header portion (15a) of the right header (15). The gas-liquid mixed phase refrigerant that has flowed into the upper header portion (15a) of the right header (15) passes through the heat exchange pipe (4) of the upper end passage group (21), and the upper header portion (14a) of the left header (14). ) And then into the lower header section (15b) of the right header (15) through the heat exchange pipe (4) of the intermediate path group (22) and further heat exchange of the lower end path group (23). It flows into the lower header part (14b) of the left header (14) through the pipe (4).

  The gas-liquid mixed phase refrigerant that has flowed into the lower header part (14b) of the left header (14) of the condensing part (12) is sent out from the refrigerant outlet, passes through the refrigerant inlet pipe (29), and passes through the refrigerant inlet (32). Flow into the upper part (7A) in the liquid receiver (7). When the gas-liquid mixed phase refrigerant flows into the upper portion (7A) in the receiver (7), moisture is removed and gas-liquid separation is performed by the desiccant (45) of the desiccant unit (8). The gas-phase refrigerant accumulates in the upper part of the upper part (7A) of the liquid receiver (7), and the liquid-phase refrigerant is stored in the small hole portion (44) and the large hole portion (43) of the communication hole (42) of the partition member (34). ) Through the refrigerant outlet (33), through the refrigerant outlet pipe (31), and from the refrigerant inlet into the left header (16) of the supercooling section (13). . The refrigerant flowing into the left header (16) of the supercooling section (13) flows into the right header (17) through the heat exchange pipe (4), and passes through the refrigerant outlet member (25) from the refrigerant outlet (not shown). It is sent to the evaporator through an expansion valve. When the refrigerant flows from the upper part (7A) in the liquid receiver (7) into the lower part (7B), the desiccant unit (8) receives the refrigerant in the liquid receiver (7). Since there is no flow resistance, the refrigerant flows smoothly from the refrigerant inlet (32) to the refrigerant outlet (33) in the receiver (7), and this heat exchanger (1) is used. It is possible to prevent the deterioration of the performance of the car air conditioner.

  6 and 7 show a first modification of the partition member.

  6 and 7, a plurality of recesses (61) extending from the lower end of the support portion (35) to the vicinity of the upper end portion and having a circular bottom surface on the peripheral surface of the support portion (35) of the partition member (60). Are formed at intervals in the circumferential direction. The upper end surface of the large hole portion (43) of the communication hole (42) through which the upper and lower both side portions (7A) (7B) in the liquid receiver (7) of the partition member (60) is passed is a flat surface. The radially inner portion of the upper end opening of the small hole portion (44) is located in the concave portion (61) of the support portion (35). In addition, the inner peripheral surface of the large hole portion (43) has a plurality of holes extending in the vertical direction and having a lower end opened to a lower end surface of the lower protruding portion (36) so as to be connected to a radially outer portion of the small hole portion (44). A cross-section arc-shaped groove (62) is formed.

  Other configurations are the same as those of the partition member (34) of the above-described embodiment.

  FIG. 8 shows a second modification of the partition member and a first modification of the support portion that supports the desiccant unit in a lifted state.

  In FIG. 8, the partition member (65) has the same configuration as the partition member (60) shown in FIGS. 6 and 7 except that the support portion (35) is not formed. Further, a conical support portion (66) is provided on the lower frame portion (49) of the holding frame (47) of the desiccant unit (8) so as to protrude downward, and the lower end of the support portion (66) is The partition member (65) is placed on the placement portion surrounded by the small hole portion (44) of the communication hole (42), whereby the desiccant unit (8) communicates with the partition member (65). The upper end opening of the hole (42) is supported by the support portion (66) in a lifted state so as not to be blocked.

  9 and 10 show a modified example of the liquid receiver.

  In the case of the liquid receiver (7) shown in FIG. 9, a refrigerant inlet (32) is formed in the upper cap (28), and one end of the refrigerant inlet pipe (70) is inserted into the refrigerant inlet (32). In this state, it is joined to the upper cap (28). The liquid receiver (7) is attached to the left tank (2) via the refrigerant inflow pipe (70) and the refrigerant outflow pipe (31).

  In the case of the liquid receiver (7) shown in FIG. 10, a refrigerant outlet (33) is formed in the lower cap (27), and one end of the refrigerant outlet pipe (71) is inserted into the refrigerant outlet (33). In this state, it is joined to the lower cap (27). The liquid receiver (7) is attached to the left tank (2) via the refrigerant inflow pipe (29) and the refrigerant outflow pipe (71).

It is a front view showing the whole heat exchanger composition of an embodiment of this invention. It is the vertical longitudinal cross-sectional view which abbreviate | omitted and showed the part which expanded and shows the part of the liquid receiver of the heat exchanger shown in FIG. It is a perspective view which shows the partition member arrange | positioned in the liquid receiver of the heat exchanger shown in FIG. It is an AA line expanded sectional view of FIG. FIG. 3 is an enlarged sectional view taken along line B-B in FIG. 2. It is a perspective view which shows the 1st modification of the partition member arrange | positioned in a liquid receiver. It is a vertical longitudinal cross-sectional view of the partition member shown in FIG. It is a figure corresponded to a part of Drawing 2 showing the 2nd modification of a partition member, and the 1st modification of a support part which supports a desiccant unit in the raised state. It is a partial front view which shows the 1st modification of a liquid receiver. It is a partial front view which shows the 2nd modification of a liquid receiver.

Explanation of symbols

(1): Heat exchanger
(2) (3): Tank
(4): Heat exchange pipe
(7): Receiver
(7A): Upper part
(7B): Lower part
(8): Desiccant unit
(9): Partition wall
(11): Partition wall
(12): Condensing part
(13): Supercooling section
(14): Condenser left header
(15): Condenser right header
(16): Supercooler left header
(17): Supercooler right header
(32): Refrigerant inlet
(33): Refrigerant outlet
(34) (60) (65): Partition member
(35) (66): Support part
(39): Groove
(42): Communication hole
(43): Large hole
(44): Small hole
(45): Desiccant
(46): Desiccant-containing bag (desiccant container)
(47): Holding frame
(61): Recess

Claims (8)

A pair of tanks extending in the vertical direction spaced apart from each other, and a plurality of heat exchange tubes arranged in parallel with a space in the vertical direction between both tanks and having both ends connected to both tanks. A fin disposed between adjacent heat exchange tubes, a cylindrical liquid receiver attached to one of the first tanks and extending in the vertical direction, and a desiccant unit disposed in the liquid receiver. A heat exchanger having a refrigerant inlet and a refrigerant outlet formed on the receiver so that the former is positioned above;
A partition member that divides the interior of the liquid receiver into upper and lower side portions is disposed at a height position between the refrigerant inlet and the refrigerant outlet in the receiver, and the upper and lower portions of the partition member are passed through the partition member. The communication hole is formed, and the desiccant unit includes a desiccant container that contains the desiccant and a holding frame that holds the desiccant container. The desiccant unit is located above the partition member in the liquid receiver. The desiccant unit is supported in a lifted state between the partition member and the desiccant unit holding frame to prevent the upper end opening of the communication hole of the partition member from being blocked by the desiccant unit. A heat exchanger provided with a support. 2. The heat exchanger according to claim 1, wherein the support portion is formed in an upward projecting shape at the central portion of the partition member, and the lower end of the holding frame of the desiccant unit is placed on the support portion. The support portion is cylindrical, and a plurality of grooves are formed on the peripheral surface of the support portion, extending upward from the lower end of the support portion and having an upper end opened to the upper end surface of the support portion, spaced in the circumferential direction. The heat exchanger according to claim 2, wherein the communication hole is opened on the upper surface of the partition member so that a part of the upper end thereof is located in the concave groove of the support portion. The support part is cylindrical, and a plurality of recesses extending from the lower end of the support part to the vicinity of the upper end part are formed at intervals in the circumferential direction on the peripheral surface of the support part. The heat exchanger according to claim 2, wherein the heat exchanger is open on the upper surface of the partition member so as to be positioned in the concave portion of the support portion. The support portion is formed in a downward projecting shape at the lower end of the holding frame of the desiccant unit, and the support portion is placed on the upper surface of the partition member, and the support portion of the holding frame on the partition member is placed thereon. The heat exchanger according to claim 1, wherein an upper end of the communication hole is opened in a portion excluding the mounting portion. The heat exchanger according to claim 5, wherein the upper end of the communication hole is opened in the partition member at an interval around the placement portion. The communication hole is composed of one large hole portion extending upward from the lower end surface of the partition member and a plurality of small hole portions connected to the upper end portion of the large hole portion, and the upper end of the small hole portion opens on the upper surface of the partition member. Item 7. The heat exchanger according to any one of Items 3 to 6. The first tank to which the liquid receiver is attached is partitioned into two headers in the longitudinal direction of the first tank by the first partition wall, and the other second tank is also the second by the second partition wall. It is divided into two headers in the length direction of the tank, both partition walls are in the same position with respect to the length direction of both tanks, and a condensing part having a function as a condenser is located above the both partition walls. A supercooling unit having a function as a supercooler is provided in a portion below both partition walls, and the refrigerant flowing out from the first tank side header of the condensing unit receives liquid through the refrigerant inlet. The heat according to any one of claims 1 to 7, wherein the refrigerant entering the vessel and flowing out from the refrigerant outlet of the liquid receiver flows into the header on the first tank side of the supercooling section. Exchanger.

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