JP2019027685A - Condenser - Google Patents

Abstract

To provide a condenser capable of making uniform diversion of a coolant to all heat exchange tubes connected to a condensation part inlet header.SOLUTION: A condenser comprises: a condensation part inlet header 12; multiple heat exchange tubes 5 connected to the condensation part inlet header 12; and an inlet member 16 in which a coolant inflow path 17 is formed. The inlet member 16 includes: one inflow port 23 through which a coolant flows in from the outside; and two outflow ports 24 which are formed while being spaced vertically and through which the coolant flows into the condensation part inlet header 12. The coolant inflow path 17 includes one first channel portion 25 communicating to the inflow port 23, and two second channel portions 26 communicating the first channel portion 25 with the outflow ports 24. A full height portion of each of the outflow ports 24 is located outside of a vertical range of one end opening 5a through which the coolant flows in, in the heat exchange tube 5 that is closest to each of the outflow ports 24.SELECTED DRAWING: Figure 3

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, bottom, left and right of FIGS. 1, 2, 7, and 8 are the top and bottom, and the left and right. Moreover, in this specification, it shall be called the ventilation direction of the paper surface front and back of FIG.1, FIG.2, FIG.7 and FIG.

  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 for sending the liquid phase refrigerant to the supercooling part, and the condensing part is arranged with an interval in the left-right direction with the longitudinal direction oriented in the vertical direction. The condensing unit inlet header and the condensing unit outlet header are arranged in parallel in the longitudinal direction between the headers, with the longitudinal direction being set to the left and right, and spaced in the vertical direction. One condensing heat exchange path comprising a plurality of flat straight tubular heat exchange tubes connected to the outlet header and adapted to allow refrigerant to flow from one end connected to the condensing unit inlet header, and to the condensing unit inlet And a supercooling portion that is disposed at intervals in the left-right direction with the longitudinal direction thereof being directed in the vertical direction. The inlet header and the supercooling section outlet header are arranged in parallel in the longitudinal direction between the headers in the left-right direction and spaced apart in the vertical direction, and both ends of the longitudinal direction are the supercooling section inlet header and the supercooling section. One supercooling heat exchange path comprising a plurality of straight tubular heat exchange pipes connected to the outlet header and configured to allow the refrigerant to flow out from one end connected to the subcooler outlet header, and the subcooler outlet header And an outlet member for allowing the refrigerant to flow out of the subcooling section outlet header, and one inlet for allowing the refrigerant to flow from the outside into the inlet section of the condensing section, and the refrigerant flowing into the condensing section inlet header. One refrigerant inflow passage having one outflow port is formed, and the outlet member of the supercooling unit has an inlet port from which the refrigerant flows in from the supercooling unit outlet header, and an outlet port from which the refrigerant flows out to the outside. A capacitor in which a refrigerant outflow path is formed is widely known (see, for example, Patent Document 1).

  By the way, since the refrigerant flowing into the condenser inlet header is a gas phase, the flow passage cross-sectional area of the refrigerant inflow passage of the inlet member is required to be larger than the flow passage cross-sectional area of the refrigerant outflow passage of the outlet member. The As a result, as described in FIG. 2 of Patent Document 1, at least one of the heat exchange paths for condensation, in this case, the entire height portion of the one end into which the refrigerant of the two heat exchange pipes flows is the inlet member. In some cases, the refrigerant is positioned within the vertical range of the outlet, and in this case, the refrigerant easily flows into the two heat exchange tubes from the refrigerant inflow path. Therefore, the amount of refrigerant flowing into the two heat exchange tubes becomes relatively large, and the amount of refrigerant flowing into other heat exchange tubes in the heat exchange path for condensation excluding these two heat exchange tubes becomes relatively small. As a result, it may be difficult to equalize the flow of the refrigerant that has flowed into the condenser inlet header through the refrigerant inlet passage of the inlet member to the total heat exchange pipe connected to the condenser inlet header.

JP 2005-241237 A

  In view of the above circumstances, an object of the present invention is to provide a condenser capable of equalizing the flow of refrigerant flowing into the condenser inlet header to the total heat exchange pipe connected to the condenser inlet header.

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

1) Condenser inlet header arranged with the longitudinal direction facing up and down, and arranged in parallel with the longitudinal direction oriented in the left and right direction and spaced in the vertical direction, and one end in the longitudinal direction is arranged at the condenser inlet header And a heat exchange path composed of a plurality of heat exchange tubes adapted to allow the refrigerant to flow in from an opening at one end connected to the condenser inlet header. The condenser inlet is connected to the condenser inlet header. An inlet member for allowing the refrigerant to flow into the header is joined, and a refrigerant inflow path having an inlet for the refrigerant to flow in from the outside and an outlet for the refrigerant to flow into the condenser inlet header is formed in the inlet member. The refrigerant that has flowed into the condenser inlet header through the refrigerant inlet passage of the inlet member flows into the heat exchanger pipe from the one end opening of the heat exchanger pipe connected to the condenser inlet header. In,
The inlet member includes one inflow port and a plurality of outflow ports formed at intervals in the vertical direction, and the refrigerant inflow path is one first flow path portion communicating with the inflow port, and the first flow There are as many second flow path portions as the outlets through which the downstream end portion of the passage direction in the refrigerant flow direction and the outlets pass, and at least a part of the total height of each outlet is the most in each outlet. A capacitor located outside a range in a vertical direction of the one end opening into which a refrigerant flows in a heat exchange pipe at a close position.

  2) The capacitor according to 1) above, wherein the entire height portion of each outlet is located outside the range in the vertical direction of the one end opening into which the refrigerant flows in the heat exchange pipe located closest to each outlet.

  3) The heat exchange pipe is a straight pipe, the center line of the heat exchange pipe is straight, and the center lines of the first flow path portion and the second flow path portion of the refrigerant inflow path of the inlet member are straight, The capacitor according to 1) or 2) above, wherein the center line of the heat exchange pipe and the center lines of the first flow path portion and the second flow path portion are parallel to each other.

  4) The capacitor according to 3) above, wherein at least one heat exchange pipe is located within a range between the outlets adjacent in the vertical direction.

  5) The flow passage cross-sectional area of the second flow passage portion of the refrigerant inflow passage of the inlet member is the same over the entire length, and the shape of each outlet of the refrigerant flow passage of the inlet member is the cross-sectional shape of the second flow passage portion. Of the above-mentioned 1) to 4), the shape of each outlet and the cross-sectional shape of the second flow path portion are flat with the ventilation direction dimension larger than the vertical dimension. A capacitor according to any one of the above.

  6) The capacitor according to any one of the above 1) to 5), wherein the size of at least one of the outlets of the inlet member is different from the size of the other outlets.

  7) The first flow path portion of the refrigerant inflow passage of the inlet member is formed of a bottomed hole having one end opened on the outer surface of the inlet member, and the one end opening of the bottomed hole is an inflow port, and the second flow path The portion is formed of a through hole having one end opened at the bottom of the bottomed hole that becomes the first flow path portion and the other end opened into the condenser inlet header, and the condenser inlet header side opening of the through hole is the outlet The capacitor according to any one of 1) to 6) above.

  8) The capacitor described in 7) above, wherein the longitudinal direction of the bottomed hole serving as the first flow path portion and the longitudinal direction of the through hole serving as the second flow path portion are directed in the same direction.

  According to the capacitors 1) to 8) above, the inlet member includes one inflow port and a plurality of outflow ports formed at intervals in the vertical direction, and the refrigerant inflow path is connected to the inflow port 1 Two first flow path portions, and the same number of second flow path portions as the outlets through which the downstream end portion of the first flow path portion in the refrigerant flow direction and the outlets pass. Since at least a part of them is located outside the vertical range of the one end opening into which the refrigerant flows in the heat exchange pipes closest to the respective outlets, the inside of the heat exchange pipes closest to the outlets It is difficult for the refrigerant to flow into the refrigerant, and the refrigerant easily flows into other heat exchange pipes except for the heat exchange pipe located closest to the outlet. Therefore, the refrigerant that has flowed into the condenser inlet header through the refrigerant inlet passage of the inlet member can be evenly divided into the total heat exchange pipe connected to the condenser inlet header, thereby preventing deterioration of the condenser performance. It becomes possible.

  According to the capacitors 2) to 4), the refrigerant flowing into the condenser outlet header can be more evenly divided into the total heat exchange pipe connected to the condenser inlet header.

  According to the capacitor of 5) above, assuming that the size of the inlet member is the same, each outlet is compared with the case where the shape of each outlet and the cross-sectional shape of the second flow path portion are circular. And the cross-sectional area of the second flow path portion can be increased, and the flow resistance can be reduced.

  According to the condenser of 6), the amount of refrigerant flowing into the condenser inlet header through the refrigerant inlet passage and outlet of the inlet member into the total heat exchange pipe connected to the condenser inlet header is effective. Can be made uniform.

  According to the capacitor 7), the flow of the refrigerant from the first flow path portion to the second flow path portion becomes smooth, and an increase in flow resistance in the refrigerant inflow passage is suppressed.

  According to the capacitor 8), the processing of the first flow path part and the second flow path part is easy, and the refrigerant inflow path can be formed in the inlet member at a relatively low cost.

It is a front view which shows concretely the whole structure of the capacitor | condenser by this invention. FIG. 2 is a front view schematically showing the capacitor of FIG. 1. FIG. 2 is a vertical sectional view in which a part of the capacitor shown in FIG. 1 is omitted. It is a disassembled perspective view which shows the principal part of the capacitor | condenser of FIG. It is a figure equivalent to FIG. 3 which shows the modification of an inlet member. FIG. 6 is a view corresponding to FIG. 4 showing the inlet member of FIG. 5. It is a front view which shows concretely the whole structure of other embodiment of the capacitor | condenser by this invention. It is a front view which shows the capacitor | condenser of FIG. 7 typically.

  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.

  Moreover, the same code | symbol is attached | subjected to the same thing and the same part through all drawings.

  FIG. 1 specifically shows the overall configuration of the capacitor according to the present invention, FIG. 2 schematically shows the capacitor of FIG. 1, and FIGS. 3 and 4 show the configuration of the main part of the capacitor of FIG. In FIG. 2, illustration of individual heat exchange tubes is omitted, and illustration of corrugated fins, side plates, inlet members, and outlet members 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 tubular heat exchange pipes (5) arranged in parallel with the left and right sides of the heat exchange pipe (5) arranged at intervals in the left-right direction with the longitudinal direction facing the vertical direction Two aluminum header tanks (6) and (7) connected at both ends, and between the adjacent heat exchange pipes (5) and heat exchange pipes at the upper and lower ends ( Aluminum corrugated fins (8) that are placed outside of 5) and joined to the heat exchange pipe (5) with brazing material, and corrugated fins (8) that are placed outside of the corrugated fins (8) at both upper and lower ends. And an aluminum side plate (9) joined by a brazing material. 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.

  Both header tanks (6) and (7) have aluminum partition members (at the same height position between the first heat exchange path (P1) and the second heat exchange path (P2)). 11) is divided into two compartments lined up and down, and the part located above the two partition members (11) in the capacitor (1) becomes the condensing part (2), and from the two partition members (11) The lower part is also the supercooling part (3). Since the first heat exchange path (P1) is provided in the condensing part (2), the section above the partition member (11) in the right header tank (6) becomes the condensing part inlet header (12). In addition, a section above the partition member (11) in the left header tank (7) is a condenser outlet header (13). In addition, since one second heat exchange path (P2) is provided in the supercooling section (3), the section below the partition member (11) in the left header tank (7) is the subcooling section inlet header ( 14) and the section below the partition member (11) in the right header tank (6) is the supercooling section outlet header (15).

  The condenser inlet header (12) has a refrigerant inflow passage (17) open at both ends at a portion of the outer peripheral surface of the peripheral wall that is biased toward one end relative to the longitudinal central portion (X), in this case, that is biased toward the lower end. In addition, an aluminum inlet member (16) for allowing the refrigerant to flow into the condenser inlet header (12) is brazed. The supercooling section outlet header (15) has a refrigerant outflow passage (19a) having both ends open at a portion of the outer peripheral surface of the peripheral wall that is biased toward the upper end side of the longitudinal central portion, and the refrigerant is supplied to the supercooling section outlet header. An aluminum outlet member (19) that flows out through the refrigerant outlet (18) formed in (15) is brazed.

  Accordingly, the condenser (2) of the condenser (1) includes a condenser inlet header (12) and a condenser outlet header (13) that are spaced apart from each other in the left-right direction with the longitudinal direction directed vertically. , Disposed between both headers (12) and (13), and both ends in the longitudinal direction are connected to the condenser inlet header (12) and the condenser outlet header (13) and to the condenser inlet header (12). The first heat exchange path (P1) composed of a plurality of heat exchange tubes (5) through which the refrigerant flows from the opening (5a) at one end, and the condenser inlet header (12) brazed and the condenser And an aluminum inlet member (16) for allowing the refrigerant to flow into the inlet header (12). The supercooling section (3) of the condenser (1) has a supercooling section inlet header (14) and a supercooling section outlet header (15) arranged with a space in the left-right direction with the longitudinal direction thereof directed vertically. Between the headers (14) and (15) and both ends in the longitudinal direction are connected to the supercooling section inlet header (14) and the supercooling section outlet header (15) and the supercooling section outlet header (15 ) Connected to the second heat exchange path (P2) composed of a plurality of heat exchange pipes (5) so that the refrigerant flows out from one end connected to the supercooling part outlet header (15) and the supercooling part And an outlet member (19) for allowing the refrigerant to flow out from the outlet header (15).

  In this embodiment, one heat exchange path is provided for each of the condensing part (2) and the subcooling part (3), but the number of heat exchanging paths is not limited to this, and the condensing part ( Heat exchange between the downstream end of the refrigerant flow direction in the heat exchange pipe (5) of the heat exchange path on the most downstream side in the refrigerant flow direction in (2) and the heat exchange path on the most upstream side in the refrigerant flow direction of the subcooling section (3). If the upstream end of the pipe (5) in the refrigerant flow direction is located on either the left or right side, it can be changed as appropriate. Here, since one heat exchange path (P1) (P2) is provided for each of the condensing unit (2) and the subcooling unit (3), the first heat exchanging path (P1) is used as the condensing unit (2). The heat exchange path on the most upstream side in the refrigerant flow direction and the heat exchange path on the most downstream side in the refrigerant flow direction, and the second heat exchange path (P2) is the most upstream in the refrigerant flow direction in the subcooling section (3) At the same time as the heat exchange path on the side, the heat exchange path is located on the most downstream side in the refrigerant flow direction.

  The liquid receiver (4) is made of aluminum and has a cylindrical shape with the longitudinal direction oriented vertically and closed at both upper and lower ends. The left header tank (7) (condenser outlet header (13) and supercooler It is provided separately from the inlet header (14)) and fixed to the left header tank (7). Although not shown, a filter and a desiccant for removing foreign substances from the refrigerant are placed in the liquid receiver (4). The lower part in the condenser outlet header (13) and the lower part in the receiver (4), and the upper part in the supercooler inlet header (14) and the lower part in the receiver (4) are the left header tank. (7) and the aluminum communication member (21) (22) brazed to the liquid receiver (4), and the refrigerant flowing out from the condenser outlet header (13) is passed through the liquid receiver (4 ) Through the supercooling section inlet header (14).

  As shown in FIGS. 3 and 4, the refrigerant inflow passage (17) of the inlet member (16) is formed with a single inlet (23) through which refrigerant flows in from the outside and is spaced apart in the vertical direction. , And a plurality of, here two, outlets (24) through which the refrigerant flows out into the condenser inlet header (12). The refrigerant inflow passage (17) includes one first flow path portion (25) communicating with the inflow port (23), and the downstream end portion of the first flow path portion (25) in the refrigerant flow direction and the outflow port (24). And the same number of second flow path portions (26).

  The first flow path portion (25) of the refrigerant inflow passage (17) of the inlet member (16) has one end opened to a flat outer surface facing the right side of the inlet member (16) and straightly extended to the left side. It consists of a cylindrical bottomed hole, and one end opening facing the right side of the bottomed hole is an inflow port (23). The cross-sectional shape of the bottomed hole serving as the first flow path portion (25) is the same over the entire length, and the shape of the inflow port (23) is the same as the cross-sectional shape of the bottomed hole. Further, the channel cross-sectional area of the first channel portion (25) is the same over the entire length.

  Both the second flow path portions (26) of the refrigerant inflow passage (17) of the inlet member (16) open to the bottom surface of the bottomed hole whose right end is the first flow path portion (25), and the other end is the inlet. The member (16) consists of a straight through-hole opened in the concave partial cylindrical surface facing the left, and the left end opening of the through-hole serves as an outlet (24). The outlet (24) faces the condenser inlet header (12) through an opening (27) formed in the condenser inlet header (12). The cross-sectional shape of the through hole serving as the second flow path portion (26) and the shape of the outlet (24) are flat with the size in the ventilation direction larger than the size in the vertical direction. The cross-sectional shape of the two second flow path portions (26) is the same over the entire length, and the shape of each outlet (24) is the same as the cross-sectional shape of each second flow path portion (26). Accordingly, the channel cross-sectional areas of the two second channel portions (26) are equal to each other over the entire length, and the sizes of the two outlets (24) are equal to each other.

  The longitudinal direction of the first flow path portion (25) in the refrigerant inflow passage (17) of the inlet member (16) and the longitudinal direction of the second flow path portion (26) are the same direction, in this case, the left-right direction. . Accordingly, the center line (O1) of the heat exchange pipe (5) which is a flat straight tube, and the first flow path part (25) and the second flow path part (26 of the refrigerant inflow path (17) of the inlet member (16). ) Center line (O2) (O3) is straight, the center line (O1) of the heat exchange pipe (5), and the center lines of the first flow path part (25) and the second flow path part (26) (O2) and (O3) are parallel.

  At least one, here, one heat exchange pipe (5) is located between the two outlets (24). That is, at least a part of the total height of each outlet (24), here all, is connected to the condenser inlet header (12) in the heat exchange pipe (5) of the first heat exchange path (P1). And located outside the vertical range of the right end opening (5a) through which the refrigerant flows, and the vertical center of each outlet (24) and the heat exchange pipe (5) of the first heat exchange path (P1) The central portion in the vertical direction of the right end opening (5a) into which the refrigerant flows is shifted in the vertical direction.

  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 condenser (1) having the above-described configuration, the high-temperature and high-pressure gas-phase refrigerant compressed by the compressor enters the refrigerant inflow path (17) from the inlet (23) of the inlet member (16), and the first flow path portion. Enters the second flow path portion (26) via (25), flows into the condenser inlet header (12) through the outlet (24) and the opening (27) of the condenser inlet header (12), and then It flows into the heat exchange pipe (5) of the first heat exchange path (P1) connected to the condenser inlet header (12). At this time, the entire height portion of the outlet (24) is located outside the vertical range of the right end opening (5a) into which the refrigerant of the heat exchange pipe (5) flows, and the vertical direction of each outlet (24) The center part of the heat exchange pipe and the center part of the right end opening (5a) into which the refrigerant flows in the vertical direction are displaced in the vertical direction, so the heat exchange pipe closest to the outlet (24) (5) Other heat exchange pipes (5) excluding the heat exchange pipe (5) located closest to the outlet (24) of the first heat exchange path (P1) while making it difficult for refrigerant to flow into The refrigerant easily flows into the inside. Therefore, the refrigerant flowing into the condenser inlet header (12) through the refrigerant inlet passage (17) of the inlet member (16) can be spread over the entire length in the condenser inlet header (12). Thus, the amount of refrigerant flowing into the total heat exchange pipe (5) of the first heat exchange path (P1) can be made uniform.

  The refrigerant that has flowed into the heat exchange pipe (5) of the first heat exchange path (P1) flows to the left in the heat exchange pipe (5) of the first heat exchange path (P1) and flows into the condenser outlet header (13 ) Flows in. The refrigerant flowing into the condenser outlet header (13) flows into the liquid receiver (4) through the communication member (21). The refrigerant that has flowed into the liquid receiver (4) is a gas-liquid mixed-phase refrigerant, and the liquid-phase main mixed-phase refrigerant of the gas-liquid mixed-phase refrigerant accumulates in the lower part of the liquid receiver (4) due to gravity, and the communication member ( 22) through the supercooling section 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 to the right in the flow path, it enters the supercooling section outlet header (15) and passes through the refrigerant inflow path (17) of the refrigerant outlet (24) (18) and outlet member (23). It flows out through the expansion valve and is sent to the evaporator.

  5 and 6 show a modification of the inlet member (16) used in the capacitor (1) shown in FIGS.

  In the case of the inlet member (30) shown in FIGS. 5 and 6, the area of one outlet (24A) of the refrigerant inlet passage (17) of the inlet member (30) and the second flow path leading to the outlet (24A). The channel cross-sectional area of the part (26A) is equal to each other and smaller than the area of the other outlet (24) and the channel cross-sectional area of the second channel part (26) leading to the outlet (24). Yes. The shape of both outlets (24) and (24A) and the shape of both second flow path portions (26) and (26A) are flat shapes in which the dimension in the ventilation direction is larger than the dimension in the vertical direction.

  The other structure of the inlet member (30) is the same as that of the inlet member (16) shown in FIGS. 3 and 4, and the first flow path portion (25) in the refrigerant inflow passage (17) of the inlet member (30). And the longitudinal direction of both the second flow path portions (26) and (26A) are in the same direction, in this case the left and right direction, and the center line (O1) of the heat exchange pipe (5) and the first direction The flow path part (25) and the center lines (O2) and (O3) of the second flow path parts (26) and (26A) are parallel to each other.

  7 and 8 show another embodiment of the capacitor according to the present invention. FIG. 7 specifically shows the overall configuration of another embodiment of the capacitor according to the present invention, and FIG. 8 schematically shows the capacitor of FIG. In FIG. 8, the illustration of the individual heat exchange tubes (5) is omitted, and the illustration of the corrugated fins and the side plates is also omitted.

  7 and 8, the condenser (40) 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 (41) provided between the part (2) and the supercooling part (3) and having a gas-liquid separation function.

  The condenser section (2) and the supercooling section (3) of the condenser (40) are each provided with at least one heat exchange path (here, one heat exchange path (5) that is continuously arranged vertically. 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 called a first heat exchange path (P1), and the heat exchange path (P2) of the supercooling part (3) is called a second heat exchange path (P2). Shall. In this embodiment, since the condensing part (2) is provided with one first heat exchange path (P1), the first heat exchanging path (P1) is the refrigerant flow direction of the condensing part (2). It is a heat exchange path on the most upstream side and at the same time a heat exchange path on the most downstream side in the refrigerant flow direction.

  The first header tank (42) connected to the right end of the condenser (40) is the right end of all the heat exchange pipes (5) constituting the first and second heat exchange paths (P1) (P2). Is arranged. The first header tank (42) is divided into two upper and lower sections by an aluminum partition member (43) provided at a height between the first heat exchange path (P1) and the second heat exchange path (P2). It is divided into A condensing unit inlet header (12) that communicates with the upstream end of the first heat exchange path (P1) of the condensing unit (2) in the refrigerant flow direction upstream of the partition member (43) of the first header tank (42). ), And a subcooling section outlet header (15) that communicates with the downstream end of the second heat exchange path (P2) of the subcooling section (3) in the refrigerant flow direction.

  On the left end side of the condenser (40) is a second header tank (with the left end of the total heat exchange pipe (5) of the first heat exchange path (P1) provided in the condenser (2) connected by brazing. 44) and a third header tank (45) in which the left end of the heat exchange pipe (5) of the second heat exchange path (P2) provided in the supercooling section (3) is connected by brazing. The three header tanks (45) are provided separately so as to be located on the outer side in the left-right direction. The upper end of the third header tank (45) is above the lower end of the second header tank (44), and here is substantially at the same height as the upper end of the second header tank (44). The lower end of the third header tank (45) is located below the lower end of the second header tank (44), and is located below the second header tank (44) in the third header tank (45). The second heat exchange pipe (5) constituting the second heat exchange path (P2) is connected to the portion to be brazed by brazing. The third header tank (45) stores the liquid phase main refrigerant condensed in the condensing unit (2) and also has a liquid receiving unit functioning as a liquid storage unit for supplying the liquid phase main refrigerant to the supercooling unit (3). 41).

  The second header tank (44) is provided with a condensing unit outlet header (13) through which the downstream end of the first heat exchange path (P1) of the condensing unit (2) passes in the refrigerant flow direction. In the portion of the third header tank (45) located below the lower end of the second header tank (44), the upstream end in the refrigerant flow direction of the second heat exchange path (P2) of the subcooling section (3) A supercooling section inlet header (14) is provided. And the lower end part in the condensation part exit header (13) of a 2nd header tank (44) and the part above the supercooling part inlet header (14) in a 3rd header tank (45) are communication members ( 46). The portion above the supercooling section inlet header (14) in the third header tank (45) and the supercooling section inlet header (14) communicate with each other in the third header tank (45).

  It is used for the capacitor (1) of the first embodiment in a portion that is biased toward one end of the outer peripheral surface of the peripheral wall of the condensing portion inlet header (12), that is, a portion that is biased toward the lower end here. An aluminum inlet member (16) is brazed.

  Other configurations are the same as those of the capacitor of the first embodiment. In this embodiment, the inlet member (30) shown in FIGS. 5 and 6 may be used.

  The condenser (40) 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 condenser (40) having the above-described configuration, the high-temperature and high-pressure gas-phase refrigerant compressed by the compressor enters the refrigerant inflow path (17) from the inlet (23) of the inlet member (16), and the first flow path portion. Enters the second flow path portion (26) via (25), flows into the condenser inlet header (12) through the outlet (24) and the opening (27) of the condenser inlet header (12), and then It flows into the heat exchange pipe (5) of the first heat exchange path (P1) connected to the condenser inlet header (12). At this time, the entire height portion of the outlet (24) is located outside the vertical range of the right end opening (5a) into which the refrigerant of the heat exchange pipe (5) flows, and the vertical direction of each outlet (24) The center part of the heat exchange pipe and the center part of the right end opening (5a) into which the refrigerant flows in the vertical direction are displaced in the vertical direction, so the heat exchange pipe closest to the outlet (24) (5) Other heat exchange pipes (5) excluding the heat exchange pipe (5) located closest to the outlet (24) of the first heat exchange path (P1) while making it difficult for refrigerant to flow into The refrigerant easily flows into the inside. Therefore, the refrigerant flowing into the condenser inlet header (12) through the refrigerant inlet passage (17) of the inlet member (16) can be spread over the entire length in the condenser inlet header (12). Thus, the amount of refrigerant flowing into the total heat exchange pipe (5) of the first heat exchange path (P1) can be made uniform.

  The refrigerant that has flowed into the heat exchange pipe (5) of the first heat exchange path (P1) flows to the left in the heat exchange pipe (5) of the first heat exchange path (P1) and flows into the second header tank (44). ) Flows into the condenser outlet header (13). The refrigerant that has flowed into the condensing unit outlet header (13) of the second header tank (44) passes through the communication member (46) and is above the supercooling unit inlet header (14) in the third header tank (45). Flows into the part.

  The refrigerant that has flowed into the portion above the supercooling section inlet header (14) in the third header tank (45) is a gas-liquid mixed phase refrigerant, and 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 (45) 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 in the second heat exchange pipe (5), and then the first header. The refrigerant enters the supercooling section outlet header (15) of the tank (42), flows out through the refrigerant outlet (18) and the refrigerant outlet passage (19a) of the outlet member (19), and is sent to the evaporator through the expansion valve.

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

(1) (40): Capacitor
(5): Heat exchange pipe
(5a): Opening
(12): Condenser inlet header
(16): Entrance member
(23): Inlet
(24) (24A): Outlet
(25): First flow path part
(26) (26A): Second flow path part
(O1): Center line of heat exchange pipe
(O2): Center line of the first flow path
(O3): Center line of the second flow path
(P1): 1st heat exchange path (heat exchange path for condensation)

Claims (8)

Condenser inlet header arranged with the longitudinal direction facing up and down, and arranged in parallel with the longitudinal direction facing left and right and spaced in the vertical direction, and one end in the longitudinal direction connected to the condenser inlet header And a heat exchange path composed of a plurality of heat exchange tubes adapted to allow refrigerant to flow from an opening at one end connected to the condenser inlet header. An inlet member for allowing the refrigerant to flow into is joined to the inlet member, and a refrigerant inflow passage having an inlet for the refrigerant to flow in from the outside and an outlet for the refrigerant to flow into the condenser inlet header is formed at the inlet member. A condenser in which the refrigerant flowing into the condenser inlet header through the refrigerant inlet passage of the member flows into the heat exchanger pipe from the one end opening of the heat exchanger pipe connected to the condenser inlet header Oite,
The inlet member includes one inflow port and a plurality of outflow ports formed at intervals in the vertical direction, and the refrigerant inflow path is one first flow path portion communicating with the inflow port, and the first flow There are as many second flow path portions as the outlets through which the downstream end portion of the passage direction in the refrigerant flow direction and the outlets pass, and at least a part of the total height of each outlet is the most in each outlet. A capacitor located outside a range in a vertical direction of the one end opening into which a refrigerant flows in a heat exchange pipe at a close position. The capacitor according to claim 1, wherein the entire height portion of each outlet is located outside the range in the vertical direction of the one end opening into which the refrigerant flows in the heat exchange pipe located closest to each outlet. The heat exchange pipe is a straight pipe, the center line of the heat exchange pipe is straight, the center lines of the first flow path portion and the second flow path portion of the refrigerant inflow path of the inlet member are straight, and heat exchange The capacitor according to claim 1 or 2, wherein the center line of the tube is parallel to the center lines of the first flow path portion and the second flow path portion. The capacitor according to claim 3, wherein at least one heat exchange tube is located within a range between the outlets adjacent in the vertical direction. The flow path cross-sectional area of the second flow path portion of the refrigerant inflow path of the inlet member is the same over the entire length, and the shape of each outlet of the refrigerant flow path of the inlet member is the same as the cross-sectional shape of the second flow path section. The shape of each outlet and the cross-sectional shape of the second flow path portion are flat shapes in which the dimension in the ventilation direction is larger than the dimension in the vertical direction. The capacitor described. The capacitor according to any one of claims 1 to 5, wherein a size of at least one outlet among all outlets of the inlet member is different from a size of other outlets. The first flow path portion of the refrigerant inflow passage of the inlet member is composed of a bottomed hole whose one end is open to the outer surface of the inlet member, the one end opening of the bottomed hole is an inflow port, and the second flow path portion is The one end has a through hole that opens to the bottom surface of the bottomed hole that becomes the first flow path portion and the other end has an opening in the condensing unit inlet header, and the condensing unit inlet header side opening of the through hole serves as an outlet. The capacitor according to claim 1. The capacitor according to claim 7, wherein the longitudinal direction of the bottomed hole serving as the first flow path portion and the longitudinal direction of the through hole serving as the second flow path portion are oriented in the same direction.

Images