JP2018200132A - Condenser - Google Patents

Abstract

To provide a condenser capable of equalizing a flow rate of refrigerant that flows in a total heat exchange pipe leading to a condensation part outlet header, and suppressing an increase in weight.SOLUTION: A condenser 1 has a condensation part 2, a supercooling part 3, and a liquid receiver 4. The condensation part 2 has one condensation heat exchange path P1, a condensation part inlet header 12 formed with a refrigerant inlet 16, and a condensation part outlet header 13. The supercooling part 3 has a supercooling heat exchange path P2, a supercooling part inlet header 14, and a supercooling part outlet header 15. The liquid receiver 4 is formed separately from the supercooling part outlet header 13. The condensation part outlet header 13 and the liquid receiver 4 are brought into communication with each other through two communication parts 21A, 21B that are provided at an interval in a vertical direction. One communication part 21A and the refrigerant inlet 16 of the condensation part inlet header 12 are provided lower than the center X in the vertical direction of the condensation part, and the other communication part 21B is provided at an opposite side to the one communication part 21A and the refrigerant inlet 16 with the center X in the vertical direction of the condensation part 2 interposed therebetween.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a capacitor suitably used for, for example, a car air conditioner mounted on an automobile.

  In this specification and claims, the top and bottom, left and right of each drawing are referred to as top and bottom and left and right, respectively, and the front and back direction of each drawing is the ventilation direction.

  For example, as a condenser of a car air conditioner, a condensing unit, a supercooling unit provided below the condensing unit, and a gas-liquid mixed phase refrigerant provided between the condensing unit and the supercooling unit and flowing in from the condensing unit are used as gas phase refrigerants. And a liquid receiving part that separates the liquid phase refrigerant into the supercooling part, and the condensing part is a single heat exchange tube that is arranged at intervals in the vertical direction. Condensation heat exchange path, condensing section inlet header that is arranged with the longitudinal direction oriented vertically and that forms a refrigerant inlet and leads to the heat exchange pipe of the condensation heat exchange path, and the longitudinal direction faces up and down And a condenser outlet header through which the heat exchange pipe of the heat exchange path for condensation communicates, and the supercooling part is composed of a plurality of heat exchange pipes arranged at intervals in the vertical direction. Heat exchange path and longitudinal direction up and down And a supercooling section inlet header that is connected to the heat exchange pipe of the supercooling heat exchange path at the upstream end in the refrigerant flow direction, the longitudinal direction is arranged in the vertical direction, and a refrigerant outlet is formed. A subcooling section outlet header through which a heat exchange pipe of a heat exchange path for supercooling at the downstream end in the refrigerant flow direction communicates, and a liquid receiving section is formed separately from the condensing section outlet header, and the longitudinal direction is vertically And a condenser in which the condenser outlet header and the liquid receiver are communicated by a single communicating portion are widely known. Hereinafter referred to as a well-known capacitor).

  In order to improve the heat exchange efficiency in the known condenser described above, the height of the refrigerant inlet where the refrigerant flows into the condenser inlet header and the height of the communication part where the refrigerant flows out of the condenser outlet header into the liquid receiver. By adjusting the position, it is effective to equalize the flow rate of the refrigerant flowing through the total heat exchange pipe constituting the heat exchange path leading to the condenser inlet header.

  By the way, in the case of a car air conditioner mounted in an automobile, the height position of the refrigerant inlet to the condenser condensing part inlet header may be limited in consideration of the piping of the pipes connecting the parts constituting the car air conditioner. In the known condenser described above, it may be difficult to equalize the flow rate of the refrigerant flowing through the total heat exchange pipe of the heat exchange path leading to the condenser inlet header.

  As a capacitor capable of equalizing the flow rate of the refrigerant flowing through the total heat exchange pipe of the heat exchange path for condensation without adjusting the height position of the refrigerant inlet and the communication portion, the present applicant has previously described the basic configuration described above. It is the same as a known condenser, and two refrigerant inlets are spaced apart in the vertical direction in the condenser inlet header, and at least one refrigerant inlet is located below the central part in the height direction of the condenser and remains. The refrigerant inlet is formed so as to be positioned above the central portion in the height direction of the condensing unit, and an inlet member having a refrigerant inflow passage for feeding the refrigerant into the condensing unit inlet header through the refrigerant inlet is provided in the condensing unit. While being joined to the condenser inlet header at a height corresponding to one refrigerant inlet formed below the central portion in the height direction, the downstream end of the refrigerant inlet direction of the refrigerant inlet passage of the inlet member is One branch portion is provided which is directly communicated with the refrigerant inlet and allows the inlet member to communicate the refrigerant flow direction intermediate portion of the refrigerant inflow passage to the outside. One end portion is connected to the inlet member and the other end portion is condensed. A condenser in which the branch portion of the inlet member is connected to the other refrigerant inlet except for the refrigerant inlet directly connected to the refrigerant inlet passage in the condenser inlet header by the refrigerant branch pipe connected to the inlet header. Proposed (see Patent Document 1).

  However, in the capacitor described in Patent Document 1, the inlet member is provided with one branch portion that communicates the intermediate portion in the refrigerant flow direction of the refrigerant inflow passage to the outside, which makes the structure complicated and cumbersome to manufacture. is there. Further, since a refrigerant branch pipe is required, the weight increases and the layout is insufficient.

Japanese Patent Laid-Open No. 2015-200478

  The object of the present invention is to solve the above-mentioned problems, and to make the flow rate of the refrigerant flowing through the total heat exchange pipe leading to the condenser outlet header uniform, without complicating the structure of the inlet member, and to suppress the weight increase. It is to provide a capacitor that can.

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

1) A condensing unit, a supercooling unit provided below the condensing unit, and a gas-liquid mixed phase refrigerant that is provided between the condensing unit and the supercooling unit and that flows from the condensing unit are converted into a gas phase refrigerant and a liquid phase refrigerant. And a liquid receiving part for sending the liquid-phase refrigerant to the supercooling part, and the condensing part is one heat exchange path for condensation consisting of a plurality of heat exchange tubes arranged at intervals in the vertical direction And a condenser inlet header that is arranged with the longitudinal direction facing up and down and that forms a refrigerant inlet and leads to the heat exchange pipe of the heat exchange path for condensation, and is arranged and condensed with the longitudinal direction facing up and down. At least one supercooling heat exchange path comprising a plurality of heat exchange pipes having a supercooling section arranged at intervals in the vertical direction. And the longitudinal direction of the refrigerant is Supercooling section inlet header through which the heat exchange pipe of the supercooling heat exchange path at the upstream end in the direction leads, and the supercooling at the downstream end in the refrigerant flow direction, with the longitudinal direction being arranged vertically and the refrigerant outlet being formed A subcooling section outlet header through which the heat exchange pipe of the heat exchange path for communication is connected, and the liquid receiving section is formed separately from the condensing section outlet header, and is arranged with the longitudinal direction thereof directed vertically, and is condensed. A condenser leading to the outlet header and the subcooling inlet header,
The condensing unit outlet header and the liquid receiving unit are communicated with each other by a plurality of communicating units provided at intervals in the vertical direction, and one of the two communicating units in all communicating units and the condensing unit The refrigerant inlet of the inlet header is provided on the same side of either the upper side or the lower side of the center of the condensing part in the vertical direction, and the other communication part of the two communication parts is in the vertical direction of the condensing part. A capacitor provided on the opposite side of the one communicating portion and the refrigerant inlet across the center.

  2) The liquid receiver is disposed outside the condenser outlet header, the lower end of the liquid receiver is located below the lower end of the condenser outlet header, and the upper end of the liquid receiver is lower than the condenser outlet header. Are also located above, and the condensing unit outlet header and a portion located above the lower end of the condensing unit outlet header in the liquid receiving unit communicate with each other through a plurality of communicating portions spaced in the vertical direction. The capacitor described in 1) above.

  3) The communication part is composed of a communication member that is disposed between the condenser outlet header and the liquid receiver, and has a passage through the condenser outlet header and the liquid receiver. The capacitor as described in 1) or 2) above, which is the same.

  4) Two communicating parts are provided at intervals in the vertical direction, and the refrigerant inlet of the condensing part inlet header and one of the communicating parts are above and below the center of the condensing part in the vertical direction. Any one of the above 1) to 3) is provided on the same side, and the other communication part is provided on the opposite side of the one communication part across the center in the vertical direction of the condensation part. Capacitor described in.

  5) The capacitor described in 4) above, wherein the refrigerant inlet of the condenser inlet header and one of the communication parts are provided below the center of the condenser in the vertical direction.

  6) The above-mentioned 1) to 1) in which one supercooling heat exchange path is provided in the supercooling section, and the total heat exchange pipe of the heat exchange path is connected to the supercooling section inlet header and the supercooling section outlet header. The capacitor according to any one of 5).

  7) A first header tank whose longitudinal direction is directed vertically is disposed on either one of the left and right sides, and is separate from the second header tank and the second header tank whose longitudinal direction is directed vertically on the other end. The first and second headers are divided into two upper and lower compartments by a partition member in the first and second header tanks. The total heat exchange pipe of the heat exchange path for condensation is connected to the upper section of the tank, and the total heat exchange pipe of the subcooling heat exchange path of the supercooling section is connected to the lower section, and the upper section of the first header tank A condenser inlet header is provided, a supercooler outlet header is provided in the lower section of the first header tank, a condenser outlet header is provided in the upper section of the second header tank, and an excess header is provided in the lower section of the second header tank. Cooling unit inlet header is provided Capacitor of the above 6), wherein that.

  8) A first header tank whose longitudinal direction is directed vertically is arranged on either the left or right end side, and a second header tank or a third header tank whose longitudinal direction is directed vertically on the other end side is The three header tanks are arranged so as to be located on the outer side in the left-right direction, the lower ends of the first header tank and the third header tank are located below the lower end of the second header tank, and the upper end thereof is lower than the lower end of the second header tank. Is located above, the inside of the first header tank is divided into two upper and lower sections by a partition member, and the total heat exchange pipe of the heat exchange path for condensation is connected to the upper section of the first header tank. Is connected to the total heat exchange pipe of the subcooling heat exchange path, is connected to the total heat exchange pipe of the heat exchange path for condensation is connected to the second header tank, and is lower than the lower end of the second header tank in the third header tank The total heat exchange pipe of the heat exchange path for supercooling is connected to the located part, the condenser inlet header is provided in the upper section of the first header tank, and the supercooler outlet header is provided in the lower section of the first header tank. The second header tank is provided with a condensing part outlet header, and the third header tank also serves as a liquid receiving part, and is supercooled at a portion located below the lower end of the second header tank in the third header tank. The capacitor as described in 6) above, wherein a part inlet header is provided.

  The capacitors 1) to 8) above constitute a refrigeration cycle together with a compressor, an expansion valve (decompressor), and an evaporator, and are mounted on a vehicle as a car air conditioner. In the refrigeration cycle, refrigerant is sucked into the compressor. Has been circulating. According to the capacitors 1) to 8) above, the condenser outlet header and the liquid receiver are communicated by a plurality of communicating portions provided at intervals in the vertical direction. One of the two communicating portions and the refrigerant inlet of the condensing portion inlet header are provided on either the upper side or the lower side of the center in the vertical direction of the condensing portion, and the two communicating portions The other communication part is provided on the opposite side of the one communication part and the refrigerant inlet across the center in the vertical direction of the condensing part, so that the condensing part is arranged at intervals in the vertical direction. Even if it has one heat exchange path for condensation consisting of a plurality of heat exchange pipes, and all the heat exchange pipes of the heat exchange path are connected to the condenser inlet header and condenser outlet header, Total heat of the heat exchange path for condensing the refrigerant flowing into the header The flow can be evenly divided into the exchange pipe, and the performance degradation of the capacitor can be prevented. That is, one of the two communicating parts in all communicating parts and the refrigerant inlet of the condensing part inlet header are provided on either the upper side or the lower side of the condensing part in the vertical direction. If the other communication part of the two communication parts is provided on the opposite side of the one communication part and the refrigerant inlet across the center in the vertical direction of the condensing part, the one communication part is excluded. Also in the communication part, a suction pressure for sucking refrigerant from the condenser outlet header to the liquid receiver is generated, and as a result, a suction pressure for sucking refrigerant from the total heat exchange pipe of the heat exchange path for condensation to the condenser outlet header is generated. . Therefore, the flow of the refrigerant from the condenser inlet header to the total heat exchange pipe of the condenser heat exchange path is promoted, and the refrigerant flowing into the condenser inlet header is equally divided into the total heat exchange pipe of the condenser heat exchange path. can do. In addition, since only the refrigerant inflow path whose downstream end in the refrigerant flow direction communicates directly with the refrigerant inlet needs to be formed in the inlet member, the structure of the inlet member is simplified and manufacture is facilitated. Moreover, since the refrigerant branch pipe is not required, the overall size of the capacitor can be suppressed and the layout can be improved.

  The capacitors 4) and 5) have the following effects. That is, in the above-described well-known capacitor, when one refrigerant inlet and one communication portion are provided on either the upper side or the lower side of the center of the condensing unit in the same direction, Refrigerant in which the amount of refrigerant flowing into the heat exchange pipe disposed on the side where the refrigerant inlet and the communication portion are provided in the total heat exchange pipe of the heat exchange path for condensation flows into the heat exchange pipe disposed on the other side The amount of the refrigerant flowing through the entire heat exchange pipe of the heat exchange path for condensation becomes non-uniform. However, even in this case, like the condensers 4) and 5), two communication parts are provided at intervals in the vertical direction, and either one of the refrigerant inlets of the condenser inlet header and one of the communication parts is connected. Is provided on either the upper side or the lower side of the center in the vertical direction of the condensing part, and the other communication part is connected to the one communication part across the center in the vertical direction of the condensing part. Is provided on the opposite side, the refrigerant flowing into the condenser inlet header is evenly divided into all the heat exchange pipes of the heat exchange path for condensation connected to the condenser inlet header and the condenser outlet header. Will improve.

1 is a front view specifically showing the overall configuration of a first embodiment of a capacitor according to the present invention; FIG. 2 is a front view schematically showing the capacitor of FIG. 1. It is a front view which shows concretely the whole structure of 2nd Embodiment of the capacitor | condenser by this invention. FIG. 4 is a front view schematically showing the capacitor of FIG. 3.

  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.

  Further, the same parts and the same parts are denoted by the same reference symbols throughout the drawings.

  FIG. 1 specifically shows the overall configuration of the first embodiment of the capacitor according to the present invention, and FIG. 2 schematically shows the capacitor of FIG. In FIG. 2, illustration of individual heat exchange tubes is omitted, and illustration of corrugated fins and side plates is also omitted.

  1 and 2, the condenser (1) is condensed with the condenser (2), the supercooling part (3) provided below the condenser (2), and the longitudinal direction thereof being directed vertically. A liquid provided between the section (2) and the supercooling section (3) and storing the liquid phase main refrigerant condensed in the condensing section (2) and supplying the liquid phase main refrigerant to the subcooling section (3). It consists of an aluminum tank receiver (4) (receiver) that has the function of a reservoir, with the width direction oriented in the ventilation direction and the longitudinal direction oriented in the left-right direction, with an interval in the vertical direction. A plurality of flat aluminum heat exchange pipes (5) arranged, and an aluminum first header arranged on the right end side with the longitudinal direction facing the vertical direction and connected to the right end of the heat exchange pipe (5) A tank (6) and an aluminum tube that is arranged on the left end side with its longitudinal direction facing up and down and to which the left end of the heat exchange pipe (5) is connected The second header tank (7) made between the adjacent heat exchange pipes (5) and outside the heat exchange pipes (5) at both upper and lower ends and joined to the heat exchange pipe (5) by brazing material An aluminum corrugated fin (8) and an aluminum side plate (9) disposed outside the corrugated fins (8) at both upper and lower ends and joined to the corrugated fin (8) by a brazing material are provided. Hereinafter, joining with a brazing material is referred to as brazing.

  The condenser (2) and the supercooling section (3) of the condenser (1) are each provided with at least one heat exchange path (here, one heat exchange path ( P1) (P2) is provided, the heat exchange path (P1) provided in the condensing part (2) becomes a heat exchange path for condensation, and the heat exchange path (P2) provided in the supercooling part (3) Is a heat exchange path for supercooling. And the refrigerant | coolant flow direction of all the heat exchange pipe | tubes (5) which comprise each heat exchange path | pass (P1) (P2) is the same, and the heat exchange pipe | tube (5) of two adjacent heat exchange paths | paths The refrigerant flow direction is different. Here, the heat exchange path (P1) of the condensing part (2) is referred to as a first heat exchange path, and the heat exchange path (P2) of the supercooling part (3) is referred to as a second heat exchange path. In this embodiment, since one second heat exchange path (P2) is provided in the supercooling section (3), the second heat exchange path (P2) serves as a refrigerant for the supercooling section (3). It is a heat exchange path on the most upstream side in the flow direction and at the same time a heat exchange path on the most downstream side in the refrigerant flow direction.

  Inside the first and second header tanks (6) and (7) is aluminum provided between the first heat exchange path (P1) and the second heat exchange path (P2) and at the same height on the lower side. It is divided into two compartments arranged in the vertical direction by the partition member (11), and the portion located above the partition members (11) in the capacitor (1) becomes the condensing part (2), and both partition members The part located below (11) is the supercooling part (3). The total heat exchange pipe (5) of the first heat exchange path (P1) is connected to a section above the partition member (11) in both header tanks (6) and (7) by brazing, and the partition member (11) The total heat exchange pipe (5) of the second heat exchange path (P2) is connected to the lower section by brazing. A condensing section inlet header (12) is provided in the entire section above the partition member (11) in the first header tank (6), and is located above the partition member (11) in the second header tank (7). A condensing section outlet header (13) is provided throughout the compartment. In addition, a supercooling section inlet header (14) is provided in the entire section below the partition member (11) in the second header tank (7), and the partition member (11 in the first header tank (6)). The subcooling section outlet header (15) is provided in the whole of the section below.

  One refrigerant inlet (in this case, a portion deviated toward one end from the center (X) in the vertical direction of the condensing portion (2) (the center in the longitudinal direction of the condensing portion inlet header (12)). 16) is formed, and the refrigerant inflow passage (both ends are open to the lower end side of the center (X) of the condensing part (2) in the vertical direction of the condensing part (2) on the outer peripheral surface of the condensing part inlet header (12) An aluminum inlet member (17) having 17a) and allowing the refrigerant to flow into the interior through the refrigerant inlet (16) is brazed. Further, a refrigerant outlet (18) is formed in a portion of the supercooling section outlet header (15) that is biased to the upper end side from the vertical center of the supercooling section (3), and the supercooling section outlet header (15) The outer wall of the peripheral wall has a refrigerant outflow passage (19a) that is open at both ends in a portion that is biased to the upper end side from the longitudinal center portion, and is made of aluminum that allows the refrigerant to flow out from the supercooling section outlet header (15). An outlet member (19) is brazed.

  The liquid receiver (4) is made of aluminum and has a cylindrical shape with the longitudinal direction directed vertically and closed at both the upper and lower ends. The second header tank (7) (condenser outlet header (13) and supercooling) Part header (14)) and is arranged on the outer side (left side) in the left-right direction of the second header tank (7) and fixed to the second header tank (7). The lower end of the receiver (4) is located below the lower end of the condenser outlet header (13), and the upper end of the receiver (4) is higher than the lower end of the condenser outlet header (13). positioned. Here, the upper end of the receiver (4) is at the same height as the upper end of the condenser outlet header (13), and the lower end of the receiver (4) is the same as the lower end of the supercooler inlet header (14). In the height position. Although not shown, a filter and a desiccant for removing foreign substances from the refrigerant are placed in the liquid receiver (4).

  In the condenser (1) described above, the condenser outlet header (13) and the portion located above the lower end of the condenser outlet header (13) in the receiver (4) are spaced apart in the vertical direction. The plurality of, in this case, two communication portions (21A) and (21B) communicate with each other. One communication part (21A) is at a height position near the lower end of the condenser outlet header (13), and the communication part (21A) and the refrigerant inlet (16) of the condenser inlet header (12) It is provided on either the upper side or the lower side of the center (X) in the vertical direction of (2), that is, the lower side here. The height position of the communication part (21A) is in the vicinity of the height position of the refrigerant inlet (16). The other communication part (21B) is at a height position near the upper end of the condenser outlet header (13). That is, the refrigerant inlet (16) of the condensing unit inlet header (12) and the lower communication unit (21A) are below the center (X) in the vertical direction of the condensing unit (2) and on the lower side The other communication part (21B) is provided on the opposite side of the one communication part (21A) across the center (X) in the vertical direction of the condensing part (2). The communication portions (21A) and (21B) are disposed between the condenser outlet header (13) and the receiver (4) and brazed to the second header tank (7) and the receiver (4). And it consists of the aluminum communication member (22) which has the channel | path which lets the inside of a condensation part exit header (13) and the inside of a liquid receiver (4) pass.

  Further, the supercooling section inlet header (14) and the portion located below the lower end of the condensing section outlet header (13) in the liquid receiver (4) are communicated with each other by one communication section (23). . The communication portion (23) is also disposed between the condenser outlet header (13) and the receiver (4), brazed to the second header tank (7) and the receiver (4), and condensed. It consists of an aluminum communication member (22) having a passage through which the inside of the partial outlet header (13) and the liquid receiver (4) pass.

  Therefore, the receiver (4) communicates with the condenser outlet header (13) and the supercooler inlet header (14), and the refrigerant flowing out of the condenser outlet header (13) After passing through 4), it flows into the supercooling section inlet header (14).

  The condenser (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 refrigeration cycle, the refrigerant is sucked into the compressor and circulated.

  In the condenser (1) configured as described above, the high-temperature and high-pressure gas-phase refrigerant compressed by the compressor passes through the refrigerant inflow passage (17a) of the inlet member (17) from the refrigerant inlet (16) to the condenser inlet header ( 12) It flows into the lower part of the inside. The refrigerant flowing into the condenser inlet header (12) enters the heat exchange pipe (5) of the first heat exchange path (P1) and flows through the heat exchange pipe (5) of the first heat exchange path (P1). The road flows to the left and flows into the condenser outlet header (13). The refrigerant that has flowed into the condenser outlet header (13) flows into the liquid receiver (4) through the two upper and lower communicating portions (21A) and (21B).

  At this time, the refrigerant is sucked and circulated by the compressor, and the one communication part (21A) and the refrigerant inlet (16) are located below the center in the vertical direction of the condensing part (2). Since the other communication part (21B) is provided on the opposite side (upper side) of the one communication part (21A) across the center in the vertical direction of the condensing part (2), the communication part ( 21B), a suction pressure for sucking the refrigerant from the condenser outlet header (13) to the receiver (4) is generated, and the condenser outlet outlet header from the total heat exchange pipe (5) of the first heat exchange path (P1). Suction pressure for sucking refrigerant into (13) is generated. Therefore, the flow of the refrigerant from the condenser inlet header (12) to the total heat exchange pipe (5) of the first heat exchange path (P1) is promoted, and the refrigerant flows below the first heat exchange path (P1). It becomes easy to flow into not only the heat exchange pipe (5) positioned but also the heat exchange pipe (5) located on the upper side. As a result, the refrigerant flowing into the condenser inlet header (12) reaches the entire condenser inlet header (12), and all of the first heat exchange path (P1) connected to the condenser inlet header (12). It is evenly divided into the heat exchange pipe (5).

  The refrigerant that has flowed into the liquid receiver (4) is a gas-liquid mixed phase refrigerant, and among the gas-liquid mixed phase refrigerant, the liquid-phase main mixed refrigerant accumulates in the lower part of the liquid receiver (4) due to gravity, and the communication portion ( 23) through the supercooler inlet header (14). The refrigerant that has entered the supercooling section inlet header (14) enters the heat exchange pipe (5) of the second heat exchange path (P2) and enters the heat exchange pipe (5) of the second heat exchange path (P2). After being supercooled while flowing rightward through the flow path, it enters the supercooling section outlet header (15) and flows out through the refrigerant outlet (18) and the refrigerant outlet passage (19a) of the outlet member (19). And sent to the evaporator through the expansion valve.

  3 and 4 show a second embodiment of the capacitor according to the present invention. FIG. 3 specifically shows the overall configuration of the second embodiment of the capacitor according to the present invention, and FIG. 4 schematically shows the capacitor of FIG. In FIG. 4, illustration of individual heat exchange tubes is omitted, and illustration of corrugated fins and side plates is also omitted.

  3 and 4, the condenser (30) is condensed with the condensing part (2), the supercooling part (3) provided below the condensing part (2), and the longitudinal direction thereof being directed vertically. A liquid receiving part (31) provided between the part (2) and the supercooling part (3) and having a gas-liquid separation function.

  The condenser (2) and the supercooling section (3) of the condenser (30) are each provided with at least one heat exchange path (here, one heat exchange path ( P1) (P2) is provided, the heat exchange path (P1) provided in the condensing part (2) becomes a heat exchange path for condensation, and the heat exchange path (P2) provided in the supercooling part (3) Is a heat exchange path for supercooling. And the refrigerant | coolant flow direction of all the heat exchange pipe | tubes (5) which comprise each heat exchange path | pass (P1) (P2) is the same, and the heat exchange pipe | tube (5) of two adjacent heat exchange paths | paths The refrigerant flow direction is different. Here, the heat exchange path (P1) of the condensing part (2) is referred to as a first heat exchange path, and the heat exchange path (P2) of the supercooling part (3) is referred to as a second heat exchange path. In this embodiment, since one second heat exchange path (P2) is provided in the supercooling section (3), the second heat exchange path (P2) serves as a refrigerant for the supercooling section (3). It is a heat exchange path on the most upstream side in the flow direction and at the same time a heat exchange path on the most downstream side in the refrigerant flow direction.

  A first header tank (32) connected to the right end of the condenser (30) is connected to the right end of all heat exchange pipes (5) constituting the first and second heat exchange paths (P1) and (P2). Are arranged with the longitudinal direction directed in the vertical direction. The first header tank (32) is divided into two upper and lower sections by an aluminum partition member (33) provided at a height between the first heat exchange path (P1) and the second heat exchange path (P2). In the condenser (30), the part located above the partition member (33) is the condensing part (2), and the part located below the partition member (33) is the supercooling part (3). It has become. The total heat exchange pipe (5) of the first heat exchange path (P1) is connected to the section above the partition member (33) of the first header tank (32) by brazing, and is also more than the partition member (33). The total heat exchange pipe (5) of the second heat exchange path (P2) is connected to the lower section by brazing. In the first header tank (32), the condenser section inlet header (12) is provided in the entire section above the partition member (33), and the subcooling section outlet header (15) is provided in the entire section below the first header tank (32). It has been.

  On the left end side of the condenser (30), there is a second header tank (34) to which the left end portion of the total heat exchange pipe (5) of the first heat exchange path (P1) provided in the condenser section (2) is connected. The third header tank (35) formed separately from the second header tank (34) and connected to the heat exchange pipe (5) of the second heat exchange path (P2) provided in the supercooling section (3). ) Is arranged such that the third header tank (35) is positioned on the outer side (left side) in the left-right direction with the longitudinal direction thereof directed in the up-down direction. The lower end of the second header tank (34) is substantially at the same height as the partition member (33). The upper end of the third header tank (35) is above the lower end of the second header tank (34), here, at the same height as the upper end of the second header tank (34), and the third header tank (35) Is located below the lower end of the second header tank (34). The total heat exchange pipe (5) of the first heat exchange path (P1) is connected to the second header tank (34) by brazing, and is lower than the lower end of the second header tank (34) in the third header tank (35). The total heat exchange pipe (5) of the second heat exchange path (P2) is connected to the lower part by brazing. The second header tank (34) is provided with a condensing unit outlet header (13), and the third header tank (35) is located below the lower end of the second header tank (34) at the subcooling unit inlet. A header (14) is provided. The third header tank (35) stores a liquid phase main refrigerant condensed in the condensing unit (2) and has a liquid receiving unit functioning as a liquid storage unit for supplying the liquid phase main refrigerant to the supercooling unit (3). 31).

  That is, the lower end of the liquid receiver (31) is positioned below the lower end of the condenser outlet header (13) and at the same height as the lower end of the subcooler inlet header (14), and the liquid receiver The upper end of (31) is located above the lower end of the condenser outlet header (13) and at the same height as the upper end of the condenser outlet header (13).

  In the condenser (30) described above, the condenser outlet header (13) and the portion located above the lower end of the condenser outlet header (13) in the liquid receiver (31) are spaced apart in the vertical direction. The plurality of, in this case, two communication portions (21A) and (21B) communicate with each other. One communication part (21A) is at a height position near the lower end of the condenser outlet header (13), and the communication part (21A) and the refrigerant inlet (16) of the condenser inlet header (12) It is provided on either the upper side or the lower side of the center (X) in the vertical direction of (2), that is, the lower side here. The height position of the communication part (21A) is in the vicinity of the height position of the refrigerant inlet (16). The other communication part (21B) is at a height position near the upper end of the condenser outlet header (13). That is, the refrigerant inlet (16) of the condensing unit inlet header (12) and the lower communication unit (21A) are below the center (X) in the vertical direction of the condensing unit (2) and on the lower side The other communication part (21B) is provided on the opposite side of the one communication part (21A) across the center (X) in the vertical direction of the condensing part (2). The communication portions (21A) and (21B) are disposed between the condenser outlet header (13) and the liquid receiver (31) and brazed to the second header tank (34) and the liquid receiver (31). And it consists of the aluminum communication member (22) which has the channel | path which lets the inside of a condensation part exit header (13) and a liquid receiving part (31) pass. The portion above the supercooling section inlet header (14) in the third header tank (35) and the supercooling section inlet header (14) communicate with each other in the third header tank (35).

  Other configurations are the same as those of the capacitor of the first embodiment.

  The condenser (30) constitutes a refrigeration cycle together with a compressor, an expansion valve (decompressor) and an evaporator, and is mounted on the vehicle as a car air conditioner. In the refrigeration cycle, the refrigerant is sucked into the compressor and circulated.

  In the condenser (30) configured as described above, the high-temperature and high-pressure gas-phase refrigerant compressed by the compressor passes through the refrigerant inflow passage (17a) of the inlet member (17) from the refrigerant inlet (16) to the condenser inlet header ( 12) It flows into the lower part of the inside. The refrigerant flowing into the condenser inlet header (12) enters the heat exchange pipe (5) of the first heat exchange path (P1) and flows through the heat exchange pipe (5) of the first heat exchange path (P1). The road flows to the left and flows into the condenser outlet header (13). The refrigerant flowing into the condenser outlet header (13) passes through the upper and lower two communicating portions (21A) and (21B), and the supercooling portion inlet header in the third header tank (35) that also serves as the liquid receiving portion (31). It flows into the part above (14).

  At this time, the refrigerant is sucked into the compressor and circulates, and the one communication part (21A) and the refrigerant inlet (16) are more than the center (X) in the vertical direction of the condensing part (2). The other communication part (21B) is provided on the opposite side (upper side) of the one communication part (21A) across the vertical center (X) of the condensation part (2). Therefore, also in the communication part (21B), a suction pressure for sucking the refrigerant from the condenser outlet header (13) to the liquid receiver (31) is generated, and the total heat exchange pipe (5 in the first heat exchange path (P1)) ) To suck in the refrigerant into the condenser outlet header (13). Therefore, the flow of the refrigerant from the condenser inlet header (12) to the total heat exchange pipe (5) of the first heat exchange path (P1) is promoted, and the refrigerant flows below the first heat exchange path (P1). It becomes easy to flow into not only the heat exchange pipe (5) positioned but also the heat exchange pipe (5) located on the upper side. As a result, the refrigerant flowing into the condenser inlet header (12) reaches the entire condenser inlet header (12), and all of the first heat exchange path (P1) connected to the condenser inlet header (12). It is evenly divided into the heat exchange pipe (5).

  The refrigerant that has flowed into the portion above the supercooling section inlet header (14) in the third header tank (35) is a gas-liquid mixed phase refrigerant. Among the gas-liquid mixed phase refrigerant, the liquid-phase main mixed phase refrigerant is caused by gravity. It accumulates in the supercooling section inlet header (14) of the third header tank (35) and enters the heat exchange pipe (5) of the second heat exchange path (P2). The liquid phase main mixed refrigerant entering the heat exchange pipe (5) of the second heat exchange path (P2) is supercooled while flowing rightward through the flow path of the heat exchange pipe (5), and then the first header. The refrigerant enters the supercooling section outlet header (15) of the tank (32), flows out through the refrigerant outlet (18) and the refrigerant outlet path (19a) of the outlet member (19), and is sent to the evaporator through the expansion valve.

  In the two embodiments described above, the condenser outlet header (13), the liquid receiver (4), and the liquid receiver (31) are communicated with each other by two communicating portions provided at intervals in the vertical direction. However, the present invention is not limited to this, and may be communicated by three or more communication portions. When three or more communication parts are used, one of the two communication parts in all the communication parts and the refrigerant inlet of the condenser inlet header are above and below the center in the vertical direction of the condenser. The other communication part of the two communication parts is provided on the opposite side to the one communication part and the refrigerant inlet across the center in the vertical direction of the condensing part.

  The capacitor | condenser by this invention is used suitably for the car air conditioner mounted in a motor vehicle.

(1) (30): Capacitor
(2): Condensing part
(3): Supercooling section
(4): Liquid receiver (liquid receiver)
(5): Heat exchange pipe
(6): First header tank
(7): Second header tank
(11): Partition member
(12): Condenser inlet header
(13): Condenser outlet header
(14): Supercooler inlet header
(15): Supercooler outlet header
(16): Refrigerant inlet
(18): Refrigerant outlet
(21A) (21B): Communication part
(22): Communication member
(31): Liquid receiver
(32): First header tank
(33): Partition member
(34): Second header tank
(35): Third header tank

Claims (8)

Separating the condensing unit, the supercooling unit provided below the condensing unit, and the gas-liquid mixed phase refrigerant flowing between the condensing unit and the condensing unit into a gas phase refrigerant and a liquid phase refrigerant And a liquid receiving part for sending the liquid-phase refrigerant to the supercooling part, and the condensing part has one heat exchange path for condensation comprising a plurality of heat exchange tubes arranged at intervals in the vertical direction, Condenser inlet header that is arranged with the longitudinal direction facing up and down and that forms a refrigerant inlet and leads to the heat exchange pipe of the heat exchange path for condensation, and heat that is condensed with the longitudinal direction arranged up and down And a condenser outlet header through which the heat exchange pipe of the exchange path communicates, and the supercooling part includes at least one supercooling heat exchange path composed of a plurality of heat exchange pipes spaced in the vertical direction; The refrigerant flow is arranged with the longitudinal direction facing up and down. A supercooling section inlet header through which the heat exchange pipe of the heat exchange path for supercooling at the improved flow end communicates, and a supercooling at the downstream end in the refrigerant flow direction while being arranged with the longitudinal direction directed vertically and a refrigerant outlet formed A subcooling section outlet header through which the heat exchange pipe of the heat exchange path for communication is connected, and the liquid receiving section is formed separately from the condensing section outlet header, and is arranged with the longitudinal direction thereof directed vertically, and is condensed. A condenser leading to the outlet header and the subcooling inlet header,
The condensing unit outlet header and the liquid receiving unit are communicated with each other by a plurality of communicating units provided at intervals in the vertical direction, and one of the two communicating units in all communicating units and the condensing unit The refrigerant inlet of the inlet header is provided on the same side of either the upper side or the lower side of the center of the condensing part in the vertical direction, and the other communication part of the two communication parts is in the vertical direction of the condensing part. A capacitor provided on the opposite side of the one communicating portion and the refrigerant inlet across the center. The liquid receiver is disposed outside the condenser outlet header, the lower end of the liquid receiver is positioned below the lower end of the condenser outlet header, and the upper end of the liquid receiver is above the lower end of the condenser outlet header. The condensing unit outlet header and a portion located above the lower end of the condensing unit outlet header in the liquid receiving unit are communicated with each other by a plurality of communication units provided at intervals in the vertical direction. The capacitor according to claim 1. The communication portion is a communication member that is disposed between the condensation portion outlet header and the liquid receiving portion and has a passage that allows the inside of the condensation portion outlet header and the liquid reception portion to pass therethrough, and the shape of all the communication members includes the passage. The capacitor according to claim 1 or 2, which is the same. Two communicating portions are provided at intervals in the vertical direction, and the refrigerant inlet of the condensing unit inlet header and any one of the communicating units are either above or below the center in the vertical direction of the condensing unit. The other communication part is provided in the other side with respect to said one communication part on both sides of the center of the up-down direction of a condensation part. Capacitor. The capacitor according to claim 4, wherein the refrigerant inlet of the condenser inlet header and one of the communication parts are provided below the center in the vertical direction of the condenser. The supercooling section is provided with one supercooling heat exchange path, and the total heat exchange pipe of the heat exchange path is communicated with the supercooling section inlet header and the supercooling section outlet header. A capacitor according to any one of the above. A first header tank with the longitudinal direction oriented in the vertical direction is arranged on either one of the left and right sides, and formed separately from the second header tank and the second header tank with the longitudinal direction oriented in the vertical direction on the other end side The liquid receiving part is arranged so that the liquid receiving part is located on the outer side in the left-right direction, and the inside of the first and second header tanks is divided into two upper and lower sections by a partition member, and the first and second header tanks The total heat exchange pipe of the heat exchange path for condensation is connected to the upper section, the total heat exchange pipe of the subcooling heat exchange path of the supercooling section is connected to the lower section, and the condenser section is connected to the upper section of the first header tank. An inlet header is provided, a subcooler outlet header is provided in the lower section of the first header tank, a condenser outlet header is provided in the upper section of the second header tank, and a supercooler is installed in the lower section of the second header tank. Entrance header is provided Capacitor according to claim 6, wherein. A first header tank whose longitudinal direction is directed vertically is arranged on one of the left and right ends, and a second header tank and a third header tank whose longitudinal direction is directed vertically on the other end are third headers The tank is arranged so as to be located on the outer side in the left-right direction, the lower ends of the first header tank and the third header tank are located below the lower end of the second header tank, and the upper end is above the lower end of the second header tank The first header tank is divided into two upper and lower sections by a partition member, and the total heat exchange pipe of the heat exchange path for condensation is connected to the upper section of the first header tank. The total heat exchange pipe of the cooling heat exchange path is connected, the total heat exchange pipe of the condensation heat exchange path is connected to the second header tank, and is below the lower end of the second header tank in the third header tank. The total heat exchange pipe of the heat exchange path for supercooling is connected to the portion to be placed, the condenser inlet header is provided in the upper section of the first header tank, and the supercooler outlet header is provided in the lower section of the first header tank. The second header tank is provided with a condensing part outlet header, and the third header tank also serves as a liquid receiving part, and is supercooled at a portion located below the lower end of the second header tank in the third header tank. The capacitor according to claim 6, further comprising a part inlet header.

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