JP2007071433A - Desiccant unit and heat exchanger using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a desiccant unit not needing a large space at the side of a heat exchanger in mounting and demounting the desiccant unit to the heat exchanger loaded on an automobile. <P>SOLUTION: This desiccant unit 100 comprises a retaining member, and a plurality of unit components 103 composed of a desiccant 102 retained by the retaining member. The retaining member is composed of a cylindrical body 101 composed of a synthetic resin cloth through which only a refrigerant can pass, and closed at both ends, and the desiccant 102 is filled in the cylindrical body 101. The cylindrical bodies 101 of the adjacent unit components 103 are connected by a connecting portion 105 integrally formed on the both cylindrical bodies 101. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a desiccant unit used for removing moisture in a refrigerant in a refrigeration cycle such as a car air conditioner, and a heat exchanger using the desiccant unit.

  In recent years, as a heat exchanger of a refrigeration cycle that constitutes a car air conditioner, in order to improve the ease of assembling to a vehicle body, a pair of headers that are spaced apart from each other, and both end portions are disposed between both headers. A plurality of heat exchange pipes connected to both headers, and a condensing part composed of corrugated fins arranged between adjacent heat exchange pipes and joined to the heat exchange pipes, and a pair arranged at intervals Headers, a plurality of heat exchange pipes arranged between the headers and having both ends connected to the headers, and corrugated fins arranged between adjacent heat exchange pipes and joined to the heat exchange pipes. A cooling unit, and a vertical liquid receiver fixed across one header of the condensing unit and one header of the supercooling unit, and the inside of a pair of tanks arranged at intervals from each other , Each partition member By partitioning, both headers of the condensing unit and the supercooling unit are formed, and the liquid receiver has a refrigerant inflow passage that leads to one header of the condensing unit and a refrigerant outflow passage that communicates with one header of the supercooling unit. And a block fixed to one tank straddling both headers and a vertical cylindrical liquid receiver body whose lower end is detachably fixed to the block, and a desiccant is placed in the receiver body. What is known is known. In this heat exchanger, in order to improve the refrigeration capacity of the refrigeration cycle, the liquid refrigerant condensed in the condensing unit is further cooled in the subcooling unit to a temperature lower by about 5 to 15 ° C. than the condensation temperature. It has become.

  However, in the heat exchanger described above, the diameter of the liquid receiver body is larger than the width in the ventilation direction of the condensing unit and the supercooling unit. Therefore, when this heat exchanger is arranged in the engine room, useless space is required. There is a problem that occurs. Further, a seal member between the liquid receiver main body and the block, a fixing member for fixing the heat receiver main body to the block, and the like are required, and there is a problem that the number of parts increases.

  Therefore, as a heat exchanger for a car air conditioner that solves such a problem, a pair of headers arranged at intervals from each other, a plurality of heat exchanges arranged between both headers and having both ends connected to both headers A condensing part composed of corrugated fins disposed between adjacent heat exchange pipes and joined to a heat exchange pipe, and a pair of parts disposed above the condensing part and spaced apart from each other Supercooling comprising a header, a plurality of heat exchange pipes arranged between the headers and having both ends connected to both headers, and corrugated fins arranged between adjacent heat exchange pipes and joined to the heat exchange pipes And a gas-liquid separation unit disposed between the condensing unit and the supercooling unit, and the gas-liquid separation unit is disposed between the pair of headers and the two headers spaced from each other. Placed on both headers A pair of tanks that are connected to each other and have a passage cross-sectional area larger than that of the heat exchange pipes of the condensing part and the supercooling part and are spaced apart from each other are partitioned by partition members. The heat exchanger in which both the header of the condensing unit, the supercooling unit, and the gas-liquid separation unit are formed, and the refrigerant flowing out of the condensing unit passes through the gas-liquid separation unit and flows into the supercooling unit. It is known (see Patent Document 1).

  By the way, in a refrigeration cycle, it is necessary to arrange | position the desiccant for removing the water | moisture content contained in a refrigerant | coolant. And also in the refrigerating cycle provided with the heat exchanger of patent document 1, it is necessary to arrange | position a desiccant, for example, putting a desiccant in the straight pipe | tube of a gas-liquid separation part is considered. In this case, a rod-shaped desiccant unit consisting of one long cylindrical holding member closed at both ends and a desiccant closely packed in the holding member and having relatively high rigidity is used. An opening is formed at a height corresponding to the straight pipe in one of the headers, and a closing member for closing the opening can be detachably attached to the header, and the desiccant is passed through the opening into the straight pipe. After inserting the unit, it is conceivable to close the opening by detachably attaching a closing member to the header.

In the case of the desiccant unit described above, a space longer than the entire length of the desiccant unit is required beside the heat exchanger when attaching to and removing from the heat exchanger. However, since there is no extra space in the lateral direction of the heat exchanger in the engine room of the automobile, the desiccant unit is used as the heat exchanger in the state where the heat exchanger described in Patent Document 1 is still attached to the automobile. It cannot be desorbed and the heat exchanger must be removed from the vehicle. Therefore, there is a problem that workability when the desiccant needs to be replaced is poor.
Japanese Patent No. 3158509

  SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problem, and to remove a heat exchanger installed in an automobile, a desiccant unit that does not require a large space on the side of the heat exchanger and a heat exchange using the desiccant unit Is to provide a vessel.

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

  1) A pair of headers arranged at a distance from each other, and a condensing part having a plurality of heat exchange tubes arranged between both headers and having both ends connected to both headers, and arranged at a distance from each other A pair of headers, a supercooling section having a plurality of heat exchange tubes disposed between the headers and having both ends connected to the headers, a pair of headers spaced from each other, and both It has a liquid receiving pipe that is placed between the headers and both ends are connected to both headers, and it has a gas-liquid separation part that is placed between the condensing part and the subcooling part. In the heat exchanger in which the refrigerant passed through the gas-liquid separation unit and flows into the supercooling unit, the desiccant unit used by being inserted into the liquid-receiving pipe of the gas-liquid separation unit, the holding member; A plurality of unit components composed of a desiccant held by a holding member Arranged in columns, connected as unit structure each other adjacent becomes bendable has been that desiccant unit.

  2) The unit structure holding member is a cylindrical body formed of a synthetic resin cloth through which only the refrigerant can pass and closed at both ends. The desiccant unit according to 1) above, wherein the cylindrical bodies are connected by a connecting portion formed integrally with both cylindrical bodies.

  3) The holding member of the unit structure includes a cylindrical body formed of a synthetic resin cloth through which only the refrigerant can pass and closed at both ends, and a frame body surrounding the cylindrical body, and the desiccant is cylinder The desiccant unit according to 1) above, wherein the frames of the holding members of the adjacent unit constituent members are detachably connected to each other by connecting means provided on the frames.

4) A pair of headers spaced apart from each other, and a condensing part having a plurality of heat exchange pipes arranged between both headers and having both ends connected to both headers, and spaced apart from each other A pair of headers, a supercooling section having a plurality of heat exchange tubes disposed between the headers and having both ends connected to the headers, a pair of headers spaced from each other, and both It has a liquid receiving pipe that is placed between the headers and both ends are connected to both headers, and it has a gas-liquid separation part that is placed between the condensing part and the subcooling part. A heat exchanger in which the refrigerant that has passed through the gas-liquid separation unit flows into the supercooling unit,
The unit mounting member is fixed to one of the headers of the gas-liquid separator, the unit mounting member is formed with a unit insertion portion that leads to the insertion hole of the header, and the desiccant unit is connected to the unit insertion portion of the unit mounting member and the header. The heat exchanger is inserted into the receiving tube through the insertion hole.

  5) The heat exchanger according to 4) above, wherein the unit mounting member also serves as a joint member for connecting the refrigerant outlet pipe to the header of the supercooling section.

  6) The unit mounting member is fixed across the header of the gas-liquid separation unit and the header of the supercooling unit, and the unit mounting member has a refrigerant passage leading to a refrigerant outlet formed in the header of the supercooling unit, and a refrigerant A communication hole is formed through the passage and the insertion hole of the header of the gas-liquid separator, a unit insertion portion is formed by a part of the refrigerant passage and the communication hole, and the desiccant unit is a unit from the outer end opening of the refrigerant passage. The heat exchanger according to 5) above, which is inserted into the liquid receiving pipe through the insertion portion and the insertion hole of the header.

  7) The unit mounting member is fixed to the header of the gas-liquid separation unit, and the unit mounting member is connected to the refrigerant outlet formed in the header of the supercooling unit via the tubular communication member, and the refrigerant A communication hole is formed through the passage and the insertion hole of the header of the gas-liquid separator, a unit insertion portion is formed by a part of the refrigerant passage and the communication hole, and the desiccant unit is a unit from the outer end opening of the refrigerant passage. The heat exchanger according to 5) above, which is inserted into the liquid receiving pipe through the insertion portion and the insertion hole of the header.

  8) The heat exchanger according to 6) or 7), wherein a plug is detachably fitted in the communication hole of the unit mounting member, and one end of the desiccant unit is detachably attached to the plug.

  9) The plug is provided with an outward flange portion, and the receiving portion for receiving the outward flange portion of the plug from the header side of the gas-liquid separation portion is provided at the end of the communication hole in the unit mounting member on the refrigerant passage side. 8) The heat exchanger described.

  10) The heat exchanger according to 9) above, wherein a portion of the plug excluding the outward flange portion is detachably fitted into the communication hole of the unit mounting member.

  11) The above-mentioned 4) to 10), in which a pair of tanks arranged at intervals from each other are partitioned by partition members to form both headers of a condensing unit, a supercooling unit, and a gas-liquid separating unit. ).

  12) The heat exchanger according to 11) above, wherein the width of the gas receiving / receiving pipe of the gas-liquid separator is equal to or less than the width of the tank in the ventilation direction.

  13) The heat exchanger according to any one of 4) to 12) above, wherein a condensing unit is disposed above the gas-liquid separation unit and a supercooling unit is disposed below.

  14) A refrigeration cycle comprising a compressor, the heat exchanger according to any one of 4) to 13), a decompressor, and an evaporator.

  15) A vehicle equipped with the refrigeration cycle described in 14) above.

  The desiccant unit of the above 1) to 3) is a condensing unit having a pair of headers spaced apart from each other and a plurality of heat exchange tubes disposed between both headers and having both ends connected to both headers. And a pair of headers spaced apart from each other, and a supercooling part having a plurality of heat exchange pipes arranged between both headers and having both ends connected to both headers, spaced apart from each other A pair of arranged headers, and a gas-liquid separating unit arranged between both headers and having a liquid receiving pipe with both ends connected to both headers, and arranged between the condensing unit and the supercooling unit The refrigerant that has flowed out of the condensing unit passes through the gas-liquid separating unit and flows into the supercooling unit, and is used by being placed in a liquid receiving pipe of the gas-liquid separating unit in the heat exchanger. That is, an insertion hole is formed in one of the headers of the gas-liquid separation part of the heat exchanger, and a unit mounting member in which a unit insertion part leading to the insertion hole of the header is formed is fixed to the header. The desiccant unit is inserted into the liquid receiving pipe of the gas-liquid separator through the unit insertion part and the insertion hole of the header. Then, the desiccant unit is removed from the heat exchanger as follows. That is, the first unit structure is pulled out laterally to the outside of the unit mounting member through the insertion hole of the header and the unit insertion portion of the unit mounting member while maintaining the horizontal orientation, and then the unit structure is connected to the connecting section. Bend and change to a vertical orientation and pull upwards. Then, the remaining unit components are sequentially pulled out to the outside of the unit mounting member through the insertion hole of the header and the unit insertion portion of the unit mounting member in the horizontal orientation, and when the unit structural body comes out of the unit mounting member, It bends at the connecting portion, changes its posture in the vertical direction, and is pulled upward. In this way, the entire desiccant unit can be removed from the heat exchanger. On the contrary, when the desiccant unit is attached to the heat exchanger, the desiccant unit is in a vertical state, one unit structure at the lower end is turned sideways, the unit insertion part of the unit mounting member and the header The entire desiccant unit can be mounted in the heat exchanger by sequentially performing the operation of inserting into the liquid receiving pipe through the insertion hole for all the unit components. Therefore, a space slightly longer than the length of one unit component member is required on the side of the heat exchanger, and the desiccant unit is installed even when the heat exchanger is still mounted on the automobile. It can be removed from the heat exchanger. As a result, workability when it becomes necessary to replace the desiccant unit is improved.

  According to the desiccant unit of 2) above, the material cost is relatively low.

  According to the desiccant unit of 3) above, the total length of the desiccant unit can be appropriately changed according to the length of the liquid receiving pipe of the heat exchanger to be used.

  According to the heat exchanger of 4) above, the desiccant unit is removed from the heat exchanger as follows. That is, the first unit structure is pulled out laterally to the outside of the unit mounting member through the insertion hole of the header and the unit insertion portion of the unit mounting member while maintaining the horizontal orientation, and then the unit structure is connected to the connecting section. Bend and change to a vertical orientation and pull upwards. Then, the remaining unit components are sequentially pulled out to the outside of the unit mounting member through the insertion hole of the header and the unit insertion portion of the unit mounting member in the horizontal orientation, and when the unit structural body comes out of the unit mounting member, It bends at the connecting portion, changes its posture in the vertical direction, and is pulled upward. In this way, the entire desiccant unit can be removed from the heat exchanger. On the contrary, when the desiccant unit is attached to the heat exchanger, the desiccant unit is in a vertical state, one unit structure at the lower end is turned sideways, the unit insertion part of the unit mounting member and the header The entire desiccant unit can be mounted in the heat exchanger by sequentially performing the operation of inserting into the liquid receiving pipe through the insertion hole for all the unit components. Therefore, a space slightly longer than the length of one unit component member is required on the side of the heat exchanger, and the desiccant unit is installed even when the heat exchanger is still mounted on the automobile. It can be removed from the heat exchanger. As a result, workability when it becomes necessary to replace the desiccant unit is improved.

  According to the heat exchanger of 5) above, since the unit mounting member also serves as a joint member that connects the refrigerant outlet pipe to the header of the supercooling section, the number of parts can be reduced and the cost can be reduced. . Moreover, it is not necessary to arrange a seal member for preventing leakage of the refrigerant between the unit mounting member and the desiccant unit, and this also reduces the number of components. That is, a refrigerant outlet pipe is connected to the joint member using a fixing member, but usually a seal member is disposed between the joint member and the fixing member. Therefore, after the desiccant unit is inserted into the liquid receiving pipe from the outer end opening of the refrigerant passage through the unit insertion part and the insertion hole of the header, the refrigerant outlet pipe is connected to the joint member by the fixing member. The leakage of the refrigerant from between the unit mounting member and the desiccant unit can be prevented by the seal member disposed between the fixing member and the fixing member.

  According to the heat exchanger of 6) above, the unit mounting member is fixed across the header of the gas-liquid separation unit and the header of the supercooling unit, and is formed on the header of the supercooling unit on the unit mounting member. A refrigerant passage that leads to the refrigerant outlet, a communication hole that passes through the refrigerant passage and the insertion hole of the header of the gas-liquid separation unit are formed, and a penetrating unit insertion part is formed by part of the refrigerant passage and the communication hole. Since the agent unit is inserted into the liquid receiving pipe from the outer end opening of the refrigerant passage through the unit insertion portion and the insertion hole of the header, the desiccant unit can be attached to and removed from the heat exchanger relatively easily.

  According to the heat exchanger of the above 7), the unit mounting member is fixed to the header of the gas-liquid separation unit, and the unit mounting member is connected to the refrigerant outlet formed in the header of the supercooling unit via the tubular communication member. A refrigerant passage that is communicated, and a communication hole that passes through the refrigerant passage and the insertion hole of the header of the gas-liquid separator are formed, and a penetrating unit insertion portion is formed by a part of the refrigerant passage and the communication hole, and the desiccant Since the unit is inserted into the liquid receiving pipe from the outer end opening of the refrigerant passage through the unit insertion portion and the insertion hole of the header, the desiccant unit can be attached to and removed from the heat exchanger relatively easily.

  According to the heat exchanger of the above 8), when the desiccant unit is pulled out of the unit mounting member, it can be held with a plug, so workability when removing the desiccant unit from the heat exchanger is improved. To do.

  According to the heat exchanger of 9), when the desiccant unit is inserted into the liquid receiving pipe from the outer end opening of the refrigerant passage through the unit insertion part and the insertion hole of the header, the outward flange is received by the receiving part. Therefore, the insertion position of the desiccant unit can be easily determined.

  According to the heat exchanger of the above 10), since the portion excluding the outward flange portion in the plug is detachably fitted into the communication hole of the unit mounting member, it is possible to prevent the desiccant unit from wobbling. .

  According to the heat exchanger of the above 11), the total number of parts can be reduced.

  According to the heat exchanger of the above 12), since the liquid receiving pipe does not protrude in the ventilation direction from the tank, it is possible to prevent a wasteful space from being generated when this heat exchanger is arranged in the engine room. become.

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

  In the following description, the term “aluminum” includes aluminum alloys in addition to pure aluminum. In the following description, the top and bottom, left and right in FIG. 2 are referred to as top and bottom and left and right, and the back side (downstream side in the ventilation direction) in FIG. 2 is the front, and the opposite side is the back.

  FIG. 1 shows a first embodiment of a desiccant unit according to the present invention.

  In FIG. 1, a desiccant unit (100) includes a cylindrical body (101) as a holding member that is formed of, for example, a synthetic resin nonwoven fabric through which only a refrigerant can pass and is closed at both ends, and a cylindrical body (101). A plurality of unit structural bodies (103) composed of the granular desiccant (102) filled therein are arranged in series so that the length direction of the cylindrical body (101) faces the same direction, and are adjacent to each other. The unit structural bodies (103) are connected so as to be bendable. A hook (104) is attached to the free end of the unit structure (103) at one end.

  The cylindrical bodies (101) of the adjacent unit components (103) in the desiccant unit (100) are connected to each other by a connecting portion (105) formed integrally with the cylindrical bodies (101). ing. That is, the desiccant unit (100) is heat-sealed in a transverse manner in a state where the long cylindrical body closed at both ends is sandwiched from both sides in the radial direction at a plurality of positions spaced in the length direction. At the same time, the desiccant is filled between the closed ends of the long cylindrical body and the heat seal portions at both ends and between adjacent heat seal portions.

  FIG. 2 shows the overall configuration of a heat exchanger in which the desiccant unit (100) described above is used, and FIGS. 3 to 6 show the configuration of the main part thereof. FIG. 7 shows how to remove the desiccant unit (100) from the heat exchanger.

  In FIG. 2, the heat exchanger (1) is provided with a condensing part (2) and a supercooling part (3) spaced apart in the vertical direction so that the former is located above in the same vertical plane. A gas-liquid separation unit (4) is provided between the condensation unit (2) and the supercooling unit (3), and the refrigerant flowing out of the condensation unit (2) flows into the gas-liquid separation unit (4). However, it passes through the gas-liquid separation part (4) and flows into the supercooling part (3).

  The condensing part (2) is arranged between the first and second aluminum headers (5) (6), which are arranged in parallel in the left-right direction and extend in the vertical direction, and between the headers (5) (6). In addition, a plurality of aluminum flat heat exchange tubes (7) with the width direction directed in the front-rear direction and spaced apart in the vertical direction and both ends connected to the headers (5) (6), respectively. And an aluminum corrugated fin (8) disposed between adjacent heat exchange tubes (7) and brazed to the heat exchange tubes (7). An aluminum side plate (9) is disposed above the heat exchange pipe (7) at the upper end with a space from the heat exchange pipe (7), and is located between the side plate (9) and the heat exchange pipe (7). Further, an aluminum corrugated fin (8) is disposed and brazed to the side plate (9) and the heat exchange pipe (7).

  The first header (5) is divided into an upper header portion (5a) and a lower header portion (5b) by a plate-like partition member (11) provided at a height slightly below the middle in the vertical direction. A refrigerant inlet (not shown) is formed at the upper end of the upper header portion (5a). Also, an aluminum inlet side joint member (10) having a refrigerant passage (not shown) leading to the refrigerant inlet is brazed to the upper end of the upper header part (5a), and the refrigerant inlet pipe (12) is made of aluminum. It is connected to the upper header part (5a) by being fixed to the inlet side joint member (10) using the made fixing member (13). The condensing unit (2) is composed of a plurality of heat exchange tubes (7) arranged continuously in the vertical direction in a portion above the partition member (11) and a portion below the partition member (11). A passage group (14A) (14B) is provided. The number of heat exchange tubes (7) constituting the upper passage group (14A) is larger than the number of heat exchange tubes (7) constituting the lower passage group (14B). In addition, the flow direction of the refrigerant in all the heat exchange tubes (7) constituting each passage group (14A) (14B) is the same, and the flow direction of the refrigerant in both passage groups (14A) (14B) Is different.

  The supercooling section (3) is disposed between the first and second aluminum headers (15) (16) and the headers (15) (16), which are spaced apart from each other in the left-right direction and extend vertically. Adjacent to a plurality of flat aluminum heat exchange tubes (17) made of aluminum, with the width direction facing in the front-rear direction and spaced apart in the vertical direction, and both ends connected to both headers (15) and (16), respectively And an aluminum corrugated fin (18) disposed between the heat exchange tubes (17) and brazed to the heat exchange tubes (17). A refrigerant outlet (31) is formed in the first header (15) (see FIG. 2). The heat exchange pipe (17) is the same as the heat exchange pipe (7) of the condensing part (2), and below the heat exchange pipe (17) at the lower end is spaced from the heat exchange pipe (17). An aluminum side plate (19) is arranged, and an aluminum corrugated fin (18) is also arranged between the side plate (19) and the heat exchange pipe (17), and the side plate (19) and the heat exchange pipe (17 ) Is brazed.

  The gas-liquid separator (4) includes aluminum first and second headers (21) (22) arranged in parallel in the left-right direction and extending in the vertical direction, and both headers (21) (22). ) Between the two headers (21) and (22), and two aluminum receiving pipes (23) in this case are provided. The liquid receiving pipe (23) is a circular pipe having an outer diameter equal to or smaller than the width in the front-rear direction of the headers (21) and (22). Note that the liquid receiving pipe (23) is not limited to a circular pipe as long as the width in the front-rear direction is equal to or smaller than the width in the front-rear direction of the header (21) (22). The surface shape can be changed, and a square tube or the like can be used. The passage sectional area of each liquid receiving pipe (23) is larger than the passage sectional area of each heat exchange pipe (7) (17). It should be noted that heat between the upper liquid receiving pipe (23) and the heat exchange pipe (7) at the lower end of the condensing part (2) and at the upper end of the lower liquid receiving pipe (23) and the supercooling part (3). Corrugated fins (8) and (18) are respectively arranged between the exchange pipe (17) and brazed to the liquid receiving pipe (23) and the heat exchange pipes (7) and (17).

  As shown in FIGS. 3 to 5, the desiccant unit (100) is placed in the lower liquid receiving pipe (23), and the axial direction of the cylindrical body (101) of all unit components (103) is the left-right direction. It is arranged in a sideways posture facing. The desiccant unit (100) is an aluminum unit mounting member brazed across the first header (15) of the supercooling section (3) and the first header (21) of the gas-liquid separation section (4) ( 28) and is installed in the liquid receiving pipe (23) through the insertion hole (29) formed in the first header (21) of the gas-liquid separator (4). The center of the insertion hole (29) and the center of the lower liquid receiving pipe (23) are at the same height. The unit mounting member (28) also serves as an outlet side joint member that connects the refrigerant outlet pipe (30) to the first header (15) of the supercooling section (3).

  The unit mounting member (28) includes a refrigerant passage (32) communicating with the refrigerant outlet (31) formed in the first header (15) of the supercooling portion (3), and the refrigerant passage (32) and the gas-liquid separator. A communication hole (33) is formed through the insertion hole (29) of the first header (21) of (4). The refrigerant passage (32) is connected to the first portion (32a) extending horizontally from the left side surface of the unit mounting member (28) to the right and the right end of the first portion (32a) and is directed to the refrigerant outlet (31). And a second portion (32b) extending obliquely downward to the right. The communication hole (33) extends horizontally from the right end surface of the first portion (32a) of the refrigerant passage (32) to the right and opens on the right side surface of the unit mounting member (28). The communication hole (33) has a stepped cylindrical shape, and a columnar plug (27) made of, for example, a synthetic resin is detachably inserted into the small diameter portion (33a). The inner diameter of the small diameter portion (33a) of the communication hole (33) is equal to the inner diameter of the first portion (32a) of the refrigerant passage (32) so that the unit component (103) of the desiccant unit (100) can pass through. It is a big size. The centers of the first portion (32a) and the communication hole (33) of the refrigerant passage (32) are at the same height as the center of the insertion hole (29). A unit insertion portion (34) is formed by the first portion (32a) of the refrigerant passage (32) and the communication hole (33).

  The left end portion of the plug (27) protrudes to the left of the small diameter portion (33a), and an outward flange (27a) is integrally formed there. The outward flange (27a) is fitted in the large diameter portion (33b) at the left end of the communication hole (33). The outward flange (27a) is formed on the right side (gas-liquid separation part (4)) by the receiving part (33c) consisting of a step part between the large diameter part (33a) and the small diameter part (33b) in the communication hole (33). From the first header (21) side). An engagement portion (24) that can engage the hook (104) of the desiccant unit (100) is formed on the right end surface of the plug (27). Furthermore, a knob (25) is formed on the left end surface of the plug (27).

  The desiccant unit (100) has the first portion (32a) in the refrigerant passage (32) of the unit mounting member (28) with the hook (104) engaged with the engaging portion (24) of the plug (27). ) Through the insertion hole (29) of the first header (21) of the unit insertion part (34) and the gas-liquid separation part (4) from the left end opening of the gas removably inserted into the lower liquid receiving pipe (23). . The unit structure (103) at the left end is arranged in the first header (21) of the gas-liquid separator (4) outside the liquid receiving pipe (23). The cylindrical part excluding the outward flange part (27a) of the plug (27) is closely fitted in the small diameter part (33a) of the communication hole (33), and the outward flange part (27a) is also the communication hole. It is received by the receiving part (33c) of (33). Here, a screw is formed on the outer peripheral surface of the cylindrical portion excluding the outward flange portion (27a) of the plug (27), and a female screw is attached to the inner peripheral surface of the small diameter portion (33a) of the communication hole (33). The cylindrical portion excluding the outward flange portion (27a) of the plug (27) may be screwed into the small diameter portion (33a) of the communication hole (33).

  The refrigerant outlet pipe (30) is connected to the first header part (15) of the supercooling part (3) by being fixed to the unit mounting member (28) using an aluminum fixing member (35). . A through hole (36) extending in the left-right direction is formed at the lower end of the fixing member (35), and the end of the refrigerant outlet pipe (30) is inserted into the left end of the through hole (36) and fixed. Yes. Further, a portion around the right end opening of the through hole (36) on the right side surface of the fixing member (35) protrudes to the right and the first portion (32a) in the refrigerant passage (32) of the unit mounting member (28). A cylindrical projecting portion (37) inserted into the left end portion is integrally formed. An O-ring (38) as a seal member is mounted on the outer peripheral surface of the cylindrical protrusion (37). Further, a bolt insertion hole (39) extending in the left-right direction is formed in the upper end portion of the fixing member (35) in a penetrating manner. A female screw hole (41) extending in the left-right direction is formed in the upper end of the unit mounting member (28) in a penetrating manner. The fixing member (35) is a bolt insertion hole (37) in a state where the cylindrical protrusion (37) is inserted into the left end of the first portion (32a) in the refrigerant passage (32) of the unit mounting member (28). The bolt (42) passed from the left in 39) is screwed into the female screw hole (41) of the unit mounting member (28), thereby being fixed to the unit mounting member (28). The fixing member (35) and the unit mounting member (28) are sealed by an O-ring (38). Further, the O-ring (38) is provided when refrigerant leaks from between the inner peripheral surface of the communication hole (33) of the unit mounting member (28) and the outer peripheral surface of the plug (27) of the holding container (24). Also seal.

  Both headers (5) and (6) of the condenser section (2), both headers (21) and (22) of the gas-liquid separator (4), and both headers (15) and (16) of the supercooling section (3) are A pair of aluminum tanks (43) (44) that are spaced apart in the direction and extend in the vertical direction are formed by being partitioned by partition members (45) (46) (47) (48), respectively. ing. The partition member (45) between the first header (5) and the first header (5) of the condensing unit (2) and the gas-liquid separation unit (4) is formed with a refrigerant inlet (50) over the entire periphery except for the peripheral portion. The partition member (48) between the second headers (16) and (22) of the supercooling part (3) and the gas-liquid separation part (4) is compared with the refrigerant inlet (50) on the outer side. Thus, a considerably small refrigerant outlet (51) is formed. Further, a partition member (46) between the first headers (15) and (21) of the supercooling section (3) and the gas-liquid separation section (4) is formed integrally with the unit mounting member (28).

  In the heat exchanger (1), the refrigerant flowing from the refrigerant inlet pipe (12) into the upper header part (5a) of the first header (5) of the condensing part (2) passes through the upper passage group (14A). It flows into the second header (6), and further flows into the lower header portion (5b) of the first header (5) through the lower passage group (14B). The refrigerant flowing into the lower header portion (5b) flows into the first header (21) of the gas-liquid separator (4) through the refrigerant inlet (50), and into the gas-liquid separator (4), That is, it accumulates in both headers (21) and (22) and in the liquid receiving pipe (23), and flows into the second header (16) of the supercooling section (3) through the refrigerant outlet (51). The refrigerant flowing into the second header (16) flows into the first header (15) through the heat exchange pipe (17), passes through the refrigerant outlet (31) and the refrigerant passage (32), and passes through the refrigerant outlet pipe. To (30).

  The gas-liquid separation unit (4) is provided with a flow rate reduction means for reducing the flow rate of the refrigerant flowing from the condensation unit (2) into the gas-liquid separation unit (4). The flow velocity reduction means surrounds the refrigerant outlet (51) in the second header (22) and the mesh (52) as a porous member stretched in the refrigerant inlet (50) of the partition member (45). And a flow path length extending member (53) that extends the flow path length from the refrigerant inlet (50) to the refrigerant outlet (51) of the refrigerant that has flowed in.

  As shown in FIG. 6, the flow path length extending member (53) includes an aluminum tubular inner member (54) provided in an upward projecting manner on the partition member (48) so as to communicate with the refrigerant outlet (51), An aluminum hollow outer member provided in an upward projecting shape so as to surround the inner member (54) in the partition member (48) and having an upper end closed and a through hole (56) formed in the lower end of the peripheral wall ( 55). The inner member (54) has its lower end inserted into the refrigerant outlet (51) and fixed to the partition member (48). The outer member (55) is integrally formed with the partition member (48) and protrudes upward and has a substantially semicircular peripheral wall (55a), and is formed integrally with the upper end of the peripheral wall (55a) and is formed on the peripheral wall (55a). A top wall (55b) for closing the upper end opening, and a through hole (56) is formed at the lower end of the flat wall portion of the peripheral wall (55a). The upper end of the outer member (55) is at a lower position than the partition member (47). The flow path length extending member (53) is fitted into the right tank (44) through the through hole (57) formed in the peripheral wall of the right tank (44) together with the partition member (48), and is inserted into the right tank (44). It is brazed.

  The heat exchanger (1) described above constitutes a refrigeration cycle together with a compressor, a decompressor (expansion valve) and an evaporator. Such a refrigeration cycle is used as an air conditioner for vehicles such as automobiles.

  In the heat exchanger (1) described above, the refrigerant passes through the refrigerant inlet (50) from the lower header part (5b) of the first header (5) of the condensing part (2) and enters the gas-liquid separation part (4). When flowing into the first header (21), the flow velocity is reduced by the action of the mesh (52). In addition, the refrigerant flows into the second header (22) through the liquid receiving pipe (23) and then into the gas-liquid separator (4), that is, in both the headers (21) (22) and the liquid receiving pipe ( 23) When passing through the refrigerant outlet (51) and outflowing into the second header (16) of the supercooling section (3), the through-hole (56) of the flow path length extension member (53) After passing through the outer member (55) and flowing upward in the outer member (55), it enters the inner member (54) from the upper end opening, and passes through the refrigerant outlet (51) to the supercooling section ( Since it flows out to the second header (16) of 3), the flow velocity is reduced again here. Accordingly, the flow rate of the refrigerant flowing into the gas-liquid separation unit (4) from the condensing unit (2) is reduced, and the residence time in the gas-liquid separation unit (4) becomes relatively long. The gas-liquid separation effect in the separation part (4) is improved. As a result, the amount of gas-phase refrigerant flowing into the supercooling section (3) is reduced, the supercooling effect in the supercooling section (3) is sufficient, and the cooling effect of the entire refrigeration cycle is improved.

  Removal of the desiccant unit (100) from the heat exchanger (1) when the desiccant unit (100) needs to be replaced is performed as follows.

  First, the fixing member (35) and the refrigerant outlet pipe (30) are removed from the unit mounting member (28) by unscrewing the bolt (42) from the female screw hole (41) of the unit mounting member (28). Next, the knob (25) of the plug (27) is pinched, and the unit structure with hook (103) provided with the hook (104) of the desiccant unit (100) is inserted into the insertion hole (29 ) And the unit insertion portion (34), and is pulled out of the unit mounting member (28). Then, after the unit structure (103) with a hook at the end on the side where the plug (27) is attached comes out of the unit mounting member (28), the plug (27) is pulled upward. Then, the unit structure with hook (103) is bent upward at the connecting portion (105) to change its posture in the vertical direction (see FIG. 7). In this state, when the plug (27) is continuously pulled upward, all the unit components (103) are sequentially placed in the horizontal orientation in the unit mounting member (29) and the unit insertion portion (34) through the insertion holes (29). 28) is pulled out to the outside, and at the outside of the unit mounting member (28), it is bent at the connecting portion (105) to change its posture in the vertical direction and is pulled upward. Thus, the entire desiccant unit (100) is removed from the heat exchanger (1).

  The heat exchanger (1) of the desiccant unit (100) is attached as follows.

  In other words, the desiccant unit (100) is vertically suspended by pinching the knob (25) of the plug (27), and the unit structure (103) at the lower end is bent at the connecting portion (105) to be turned sideways. The posture is changed to and inserted into the liquid receiving tube (23) through the unit insertion portion (34) and the insertion hole (29). Next, all unit components (103) except the unit component (103) at the end where the plug (27) is attached are inserted into the liquid receiving tube (23) in the same manner as described above. The unit structure (103) at the end on the side to which the plug (27) is attached is disposed in the first header (21). Next, the plug (27) is fitted into the communication hole (33). Thereafter, the cylindrical projecting portion (37) of the fixing member (35) is inserted into the left end portion of the first portion (32a) in the refrigerant passage (32) of the unit mounting member (28) and passed through the bolt insertion hole (39). The fixed member (35) and the refrigerant outlet pipe (30) are attached to the unit mounting member (28) by screwing the bolt (42) into the female screw hole (41). Thus, the desiccant unit (100) is attached to the heat exchanger (1).

  8 and 9 show a second embodiment of the desiccant unit according to the present invention.

  In FIG. 8, the desiccant unit (200) includes a plurality of unit components (202) including a holding member (201) and a desiccant (102) held by the holding member (201). The holding member (201) of the unit structural body (202) is formed of a synthetic resin nonwoven fabric through which only the refrigerant can pass, and surrounds the cylindrical body (203) closed at both ends, and the cylindrical body (203). It consists of a synthetic resin frame (204), and a cylindrical desiccant (102) is filled in the cylindrical body (203). Then, the plurality of unit structural bodies (202) are arranged in series so that the length direction of the cylindrical body (203) faces the same direction, so that adjacent unit structural bodies (202) can be bent freely. And detachably connected by connecting means.

  An engagement ring (205) is formed at one end of the frame (204), and a hook (206) that is detachably engaged with the engagement ring (205) is formed at the other end. Adjacent unit components (202) are connected by engaging a hook (206) with an engagement ring (205) of one frame (204), and the engagement ring (205) and the hook are connected. (206) constitutes a connecting means. In the desiccant unit (200) of the second embodiment, the hook (206) not engaged with the engagement ring (205) in the frame (204) of the unit structure (202) at one end is plugged. In the state of being engaged with the engaging portion (205) of (27), it is arranged in the heat exchanger (1) in the same manner as the desiccant unit (100) of the first embodiment.

  When it is necessary to replace the desiccant unit (200), the desiccant unit (200) is removed from the heat exchanger (1) in the same manner as in the case of the desiccant unit (100) of the first embodiment. Mounted on the exchanger (1).

  According to the desiccant unit (200) of the second embodiment, as shown in FIG. 9, the length can be changed by changing the number of unit components (202) to be connected. The length of the desiccant unit (200) can be appropriately changed in accordance with the size in the left-right direction of (1), that is, the length of the liquid receiving pipe (23).

1 is an overall perspective view showing a first embodiment of a desiccant unit according to the present invention. It is a front view which shows the whole structure of the heat exchanger in which the desiccant unit by this invention is used. FIG. 3 is a partially enlarged vertical sectional view showing a part of the heat exchanger shown in FIG. 2. It is a principal part enlarged view of FIG. It is a disassembled perspective view which expands and shows the part of the 1st header of the gas-liquid separation part in the heat exchanger shown in FIG. 2, and a supercooling part. It is a disassembled perspective view which expands and shows the part of the 2nd header of the gas-liquid separation part of the heat exchanger shown in FIG. It is a figure which shows the method of removing a desiccant unit from the heat exchanger shown in FIG. It is a whole perspective view which shows 2nd Embodiment of the desiccant unit by this invention. It is a perspective view which shows the example which changes the length of the desiccant unit shown in FIG.

Explanation of symbols

(1): Heat exchanger
(2): Condensing part
(3): Supercooling section
(4): Gas-liquid separation part
(5) (6): Header
(7): Heat exchange pipe
(15) (16): Header
(17): Heat exchange pipe
(21) (22): Header
(23): Receiver tube
(27): Plug
(27a): outward flange
(28): Unit mounting member
(29): Insertion hole
(30): Refrigerant outlet pipe
(31): Refrigerant outlet
(32): Refrigerant passage
(33): Communication hole
(33c): Receiver
(34): Unit insertion part
(43) (44): Tank
(45) (46) (47) (48): Partition member
(100): Desiccant unit
(101): Cylindrical body (holding member)
(102): Desiccant
(103): Unit component
(105): Connection part
(200): Desiccant unit
(201): Holding member
(202): Unit component
(203): Tubular body
(204): Frame
(205): Engagement ring
(206): Hook

Claims (15)

A pair of headers arranged at a distance from each other, a condensing part having a plurality of heat exchange tubes arranged between both headers and having both ends connected to both headers, and 1 arranged at a distance from each other A pair of headers, a supercooling section having a plurality of heat exchange pipes arranged between the headers and having both ends connected to the headers, a pair of headers spaced from each other, and between the headers And a gas-liquid separation part arranged between the condensing part and the supercooling part, and having a liquid receiving pipe whose both ends are connected to both headers. Is a desiccant unit that is used by being placed in a liquid receiving pipe of the gas-liquid separation unit in a heat exchanger configured to pass through the gas-liquid separation unit and flow into the supercooling unit, the holding member, and the holding member The unit structure consisting of the desiccant Arranged in Jo, connected as unit structure each other adjacent becomes bendable has been that desiccant unit. The holding member of the unit structure is a cylindrical body formed of a synthetic resin cloth through which only the refrigerant can pass and closed at both ends, and is filled with a desiccant in the cylindrical body. The desiccant unit according to claim 1, wherein the shaped bodies are connected to each other by a connecting portion formed integrally with both cylindrical bodies. The holding member of the unit structure includes a cylindrical body that is formed of a synthetic resin cloth through which only the refrigerant can pass and is closed at both ends, and a frame that surrounds the cylindrical body, and the desiccant is contained in the cylindrical body. The desiccant unit according to claim 1, wherein the frame members of the holding members of the adjacent unit constituent members are detachably connected by connecting means provided on the frame members. A pair of headers arranged at a distance from each other, a condensing part having a plurality of heat exchange tubes arranged between both headers and having both ends connected to both headers, and 1 arranged at a distance from each other A pair of headers, a supercooling section having a plurality of heat exchange pipes arranged between the headers and having both ends connected to the headers, a pair of headers spaced from each other, and between the headers And a gas-liquid separation part arranged between the condensing part and the supercooling part, and having a liquid receiving pipe whose both ends are connected to both headers. Is a heat exchanger adapted to pass through the gas-liquid separation part and flow into the supercooling part,
The unit mounting member is fixed to one of the headers of the gas-liquid separator, the unit mounting member is formed with a unit insertion portion that leads to the insertion hole of the header, and the desiccant unit is connected to the unit insertion portion of the unit mounting member and the header. The heat exchanger is inserted into the receiving tube through the insertion hole. The heat exchanger according to claim 4, wherein the unit mounting member also serves as a joint member for connecting the refrigerant outlet pipe to the header of the supercooling section. The unit mounting member is fixed across the header of the gas-liquid separation unit and the header of the supercooling unit, and the unit mounting member has a refrigerant passage that leads to a refrigerant outlet formed in the header of the supercooling unit, and a refrigerant passage. A communication hole is formed through the insertion hole of the header of the gas-liquid separator, a unit insertion part is formed by a part of the refrigerant passage and the communication hole, and the desiccant unit is connected to the unit insertion part from the outer end opening of the refrigerant passage. The heat exchanger according to claim 5, wherein the heat exchanger is inserted into the receiving pipe through an insertion hole of the header. A unit mounting member is fixed to the header of the gas-liquid separation unit, and the unit mounting member is connected to a refrigerant outlet formed in the header of the supercooling unit via a tubular communication member, and a refrigerant passage. A communication hole is formed through the insertion hole of the header of the gas-liquid separator, a unit insertion part is formed by a part of the refrigerant passage and the communication hole, and the desiccant unit is connected to the unit insertion part from the outer end opening of the refrigerant passage. The heat exchanger according to claim 5, wherein the heat exchanger is inserted into the receiving pipe through an insertion hole of the header. The heat exchanger according to claim 6 or 7, wherein a plug is detachably fitted in the communication hole of the unit mounting member, and one end of the desiccant unit is detachably attached to the plug. The plug is provided with an outward flange portion, and a receiving portion for receiving the outward flange portion of the plug from the header side of the gas-liquid separation portion is provided at an end portion of the communication hole in the unit mounting member on the refrigerant passage side. The described heat exchanger. The heat exchanger according to claim 9, wherein a portion of the plug excluding the outward flange portion is detachably fitted into the communication hole of the unit mounting member. The inside of a pair of tank arrange | positioned mutually spaced apart by a partition member, respectively, The header of both a condensation part, a supercooling part, and a gas-liquid separation part is formed among Claims 4-10 The heat exchanger in any one of. The heat exchanger according to claim 11, wherein a width of the liquid receiving pipe of the gas-liquid separation unit is equal to or smaller than a width of the tank in the ventilation direction. The heat exchanger according to any one of claims 4 to 12, wherein a condensing part is arranged on the upper side of the gas-liquid separating part and a supercooling part is arranged on the lower side. A refrigeration cycle comprising a compressor, the heat exchanger according to any one of claims 4 to 13, a decompressor, and an evaporator. A vehicle comprising the refrigeration cycle according to claim 14.

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