JP2020046094A - Condenser - Google Patents

Abstract

To provide a condenser in which a base member and a tank member to be brazed in a partially fitted state can be brazed in a predetermined fitted state.SOLUTION: A condenser includes a condensation part, a supercooling part and a liquid receiver 4. The liquid receiver 4 comprises: a base member 23 which is a cylindrical shape in which upper and lower ends are open and which is fixed to one header tank 7; a tank member 24 which is a cylindrical shape in which an upper end is closed and a lower end is open, and which is fixed to the base member 23; and a plug 25 fitted in the base member 23. The base member 23 and the tank member 24 are brazed in a partially fitted state. A protrusion 42 is provided on an outer peripheral surface of the tank member 24 of the liquid receiver 4. A protrusion piece 43 protruding to the tank member 24 side is provided on an outer peripheral surface of the base member 23. At the protrusion piece 43, a fitting recess part 44 is formed which comprises a cutout 45 and in which the protrusion 42 is fitted. The protrusion 42 is engaged with a side edge on the tank member 24 side of the fitting recess part 44.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a condenser used for a car air conditioner which is a refrigeration cycle mounted on an automobile, for example.

  In this specification and the appended claims, the vertical and horizontal directions in FIG. 1 are referred to as vertical and horizontal directions.

  In this specification, the term "liquid-phase refrigerant" includes a liquid-phase main-phase refrigerant mixed with a small amount of a gas-phase refrigerant.

  As a condenser of a car air conditioner, a condenser, a supercooling section provided below the condenser, and a hollow liquid receiver provided between the condenser and the supercooler and having a longitudinal direction directed vertically. Including a plurality of heat exchange tubes arranged in the vertical direction with the longitudinal direction oriented in the left-right direction, and arranged in the left-right direction with the longitudinal direction oriented in the vertical direction, and A condenser comprising a pair of header tanks to which both left and right ends of a heat exchange tube are connected, wherein a condenser is provided with a condenser outlet header arranged with the longitudinal direction facing up and down, and one end in the longitudinal direction. A heat exchange path comprising a plurality of heat exchange tubes connected to the condensing section outlet header, wherein the subcooling section is disposed adjacent to and below the condensing section outlet header, and one side together with the condensing section outlet header. Header tank It is provided with a provided supercooling section inlet header, and a heat exchange path composed of a plurality of heat exchange tubes connected at one end in the longitudinal direction to the supercooling section inlet header. And a female screw forming part having a female screw part formed at the upper part of the inner peripheral surface, and a lower end part is joined to the female screw forming part with the longitudinal direction directed vertically. And a cylindrical main body part whose upper end is closed and whose lower end is opened, and which is formed in a columnar shape, is inserted into the female screw forming part, and has a male screw part which is screwed into the female screw part. Wherein the female screw forming portion is inserted into the body portion and joined to an inner peripheral surface of the body portion, and a non-insertion portion arranged outside the body portion. Wherein the female screw portion is provided in the non-insertion portion, and the main body portion A refrigerant inflow hole through which the refrigerant flows in from the condenser of the condenser is formed, a refrigerant outflow hole through which the refrigerant flows out in the supercooling portion of the condenser is formed in the female screw forming portion, and a female screw portion in the inner peripheral surface of the female screw forming portion is formed. There is known a capacitor in which a portion between a lower portion of the cap and a portion of the outer peripheral surface of the cap below a male screw portion is sealed by sealing means (see Patent Document 1).

  By the way, when the capacitor described in Patent Document 1 is manufactured by a method of collectively brazing by heating a combined body of all parts in a furnace, the insertion portion of the female screw forming portion of the receiver is inserted from the main body portion. The insertion portion of the female screw forming portion may become shallowly fitted into the main body portion of the female screw forming portion, and the insertion portion of the female screw forming portion and the main body may not be brazed in a predetermined fitting state. There is.

JP-A-2005-28394

  SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems and to provide a capacitor capable of brazing a base member and a tank member brazed in a partially fitted state to each other in a predetermined fitted state. is there.

  The present invention has the following aspects to achieve the above object.

1) a condensing section, a subcooling section provided below the condensing section, and a hollow liquid receiver provided between the condensing section and the supercooling section, and having a longitudinal direction directed vertically. A plurality of heat exchange tubes oriented in the left-right direction and arranged at intervals in the vertical direction, and a plurality of heat exchange tubes arranged in the left-right direction with the longitudinal direction oriented in the up-down direction, and It has a pair of header tanks connected at both left and right ends, and the liquid receiver has a cylindrical shape with upper and lower ends open, and a base member fixed to one of the header tanks, and an upper end is closed. In the state where the base member and the tank member are partially fitted, the tank member has a cylindrical shape having an open lower end, and is fixed to the base member, and includes a closing member that closes a lower end opening of the base member. With the capacitor being joined I,
A protrusion is provided on the outer peripheral surface of one of the base member and the tank member of the liquid receiver, and a protruding piece that protrudes toward the one member is also provided on the outer peripheral surface of the other member, A fitting recess in which the projection fits is formed on the protruding piece, and the projection is engaged with a side edge on the one of the upper and lower side edges of the fitting recess, and the projection and the fitting recess are Are provided in such a positional relationship that when the base member and the tank member are relatively rotated about the central axis, the protrusions are fitted into the fitting recesses and disengaged from the fitting recesses. The base member and the tank member are partially fitted together, and the base member is brazed to the tank member in a state where the protrusions are engaged with the one of the upper and lower side edges of the fitting recess on the one member side. Capacitors joined by

  2) A fitting recess is formed in the protruding piece, and one end is formed of a notch opened at a vertical side edge of the protruding piece, and the protrusion is located on the one member side of upper and lower side edges of the notch. The capacitor according to 1) above, which is engaged with the edge.

  3) The projecting piece has a joining surface joined to the outer surface of the one header tank, and the projecting end surface of the projection is flush with the joining surface, or has a notch more than the joining surface. The capacitor according to 2) above, which is located inside.

  4) On the base member, two fixing pieces having a joining surface joined to the outer surface of the one header tank are provided at intervals in the vertical direction, and the protruding pieces are integrally formed with the upper fixing piece. The capacitor according to 3) above, which is provided.

  5) The condensing section includes a condensing section exit header arranged with the longitudinal direction facing up and down, and a heat exchange path including a plurality of heat exchange tubes connected at one end in the longitudinal direction to the condensing section exit header. The supercooling section includes a subcooling section inlet header arranged adjacent to and below the condensing section outlet header, and a heat exchanger including a plurality of heat exchange tubes each having one longitudinal end connected to the subcooling section inlet header. A condensing section outlet header and a subcooling section inlet header are provided in one header tank to which the fixed pieces of the base member are joined, and the condensing section outlet header is provided with refrigerant from the condensing section. A refrigerant outlet for flowing out is formed, a refrigerant inlet for flowing refrigerant from the receiver is formed in the supercooling section inlet header, and a refrigerant for the condenser outlet header of the condensing section is formed in the base member of the receiver. A refrigerant inflow hole leading to the outlet and Refrigerant outflow holes communicating with the refrigerant inflow ports of the cooling unit are formed at intervals in the vertical direction so that the refrigerant inflow holes are located upward, and the inner ends of the refrigerant inflow holes and the refrigerant outflow holes are opened in the base member. The capacitor according to the above item 4), wherein the outer end is open to the joint surface of the fixed piece.

  According to the condensers of 1) to 5) above, the projection is provided on the outer peripheral surface of one of the base member and the tank member of the liquid receiver, and the one side is also provided on the outer peripheral surface of the other member. A protruding piece protruding toward the member side is provided, and a fitting recess is formed in the protruding piece to fit the protrusion, and the protrusion is engaged with a side edge on the one of the upper and lower side edges of the fitting recess. The protrusions and the fitting recesses are adapted to be fitted into and disengaged from the fitting recesses when the base member and the tank member are relatively rotated around the central axis. The base member and the tank member are inserted such that the insertion portion of one member is inserted into the end opening of the other member, and the projections are on the upper and lower sides of the fitting recess. State in which the edge is engaged with the side edge of the one member side Since the base member is joined to the tank member with a brazing material, when the capacitor is manufactured by a method of brazing all together by heating the combination of all parts in a furnace, the liquid It is possible to prevent a part where the base member and the tank member of the container are partially fitted from each other from being disengaged, or prevent the fitted state from becoming shallow. Therefore, the insertion portion and the other member can be brazed in a predetermined fitting state.

  According to the capacitor of the above 2), the fitting concave portion can be formed relatively easily on the projecting piece of the other of the base member and the tank member of the liquid receiver.

  According to the capacitor of the above 3), the projecting piece can be used for brazing the other one of the base member and the tank member of the liquid receiver to the one header tank.

  According to the capacitor of 4), the projecting piece can be provided by using the fixing piece used for joining the base member of the liquid receiver to the header tank, and there is no need to separately provide the projecting piece.

  According to the condenser of the above 5), it is necessary to separately prepare a means for flowing the refrigerant from the condenser outlet header into the receiver and a means for flowing the refrigerant from the receiver to the supercooler inlet header. And the interior of the receiver can be communicated with the outlet header of the condensation section and the header of the subcooling section with a relatively simple configuration.

FIG. 1 is a front view showing an overall configuration of a capacitor according to the present invention. It is a front view which shows the capacitor of FIG. 1 typically. FIG. 2 is a partially cut-away vertical cross-sectional view showing a left header tank and a liquid receiver of the condenser of FIG. 1 as viewed from the front in an enlarged manner. FIG. 2 is a partially cutaway exploded perspective view showing a left header tank and a liquid receiver of the condenser of FIG. 1, in a state before a base member forming the liquid receiver and a main body of the tank member are joined. FIG. 4 is an enlarged sectional view taken along line AA of FIG. 3.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

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

  FIG. 1 specifically shows the overall configuration of the capacitor of the present invention, FIG. 2 schematically shows the capacitor of FIG. 1, and FIGS. 3 to 5 show the configuration of the main part of the capacitor of FIG. In FIG. 2, the illustration of the individual heat exchange tubes is omitted, and the illustration of the corrugated fin, the side plate, the refrigerant inlet member, and the refrigerant outlet member is also omitted.

  In FIG. 1 and FIG. 2, the condenser (1) includes a condenser (2), a supercooler (3) provided below the condenser (2), and a condenser with the longitudinal direction directed vertically. The gas-liquid mixed-phase refrigerant provided between the section (2) and the subcooling section (3) and condensed in the condenser section (2) is separated into a gas-phase refrigerant and a liquid-phase refrigerant, and stores the liquid-phase refrigerant. And an aluminum tank-shaped liquid receiver (4) for supplying a liquid-phase refrigerant to the supercooling section (3). The condenser (1) forms 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.

  The condenser (1) has a plurality of aluminum flat heat exchange tubes (5) arranged in the vertical direction with the width direction oriented in the ventilation direction and the longitudinal direction oriented in the left-right direction, and in the longitudinal direction. Two aluminum header tanks (6) and (7), which are arranged at intervals in the left and right direction with the heat exchanger tubes (5) Aluminum corrugated fins (8) arranged between the exchange tubes (5) and outside the heat exchange tubes (5) at the upper and lower ends and joined to the heat exchange tubes (5) by brazing material, and corrugates at the upper and lower ends An aluminum side plate (9) disposed outside the fin (8) and joined to the corrugated fin (8) by a brazing material. Hereinafter, the joining with the brazing material is referred to as brazing.

  The condenser (2) and the supercooling unit (3) of the condenser (1) each include at least one heat exchanger tube (5), which is arranged in a row one above the other. P1) and (P2) are provided, the heat exchange path (P1) provided in the condensing section (2) becomes a refrigerant condensing path, and the heat exchange path (P2) provided in the subcooling section (3) is a refrigerant. It is a super cooling path. And the refrigerant flow direction of all the heat exchange tubes (5) constituting each heat exchange path (P1) (P2) is the same, and the heat exchange tubes (5) of the two adjacent heat exchange paths The refrigerant flow direction is different. Here, the heat exchange path (P1) of the condensing section (2) is referred to as a first heat exchange path, and the heat exchange path (P2) of the subcooling section (3) is referred to as a second heat exchange path. In this embodiment, one heat exchange path is provided for each of the condenser section (2) and the subcooling section (3), but the number of heat exchange paths is not limited to this, and The downstream end of the heat exchange pipe (5) of the heat exchange path (5) on the most downstream side in the refrigerant flow direction of the section (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 heat exchange tube (5) in the refrigerant flow direction is located on the same side 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 section (2) and the subcooling section (3), the first heat exchange path (P1) is connected to the condensing section (2). At the same time as the heat exchange path on the most upstream side in the refrigerant flow direction, it becomes the heat exchange path on the most downstream side in the refrigerant flow direction, and the second heat exchange path (P2) And at the same time as the heat exchange path on the most downstream side in the refrigerant flow direction.

  Inside the two header tanks (6) and (7), an aluminum partition member provided between the first heat exchange path (P1) and the second heat exchange path (P2) and at the same height on the lower side ( 11) is divided into two sections arranged in the vertical direction, the portion of the condenser (1) located above the two partition members (11) becomes the condensing part (2), from the two partition members (11) The lower part is also a subcooling section (3).

  A refrigerant inlet (12) through which gas-phase refrigerant compressed by the compressor flows is formed in a portion of the peripheral wall of the right header tank (6) above the partition member (11), and a peripheral wall of the right header tank (6) is formed. A refrigerant outlet (13) through which the liquid-phase refrigerant flows out toward the expansion valve is formed below the partition member (11). Further, an aluminum refrigerant inlet member (14) communicating with the refrigerant inlet (12) and an aluminum refrigerant outlet member (15) communicating with the refrigerant outlet (13) are brazed to the right header tank (6). Further, a refrigerant outlet (16) through which the gas-liquid mixed-phase refrigerant flows out into the receiver (4) is formed in a portion of the peripheral wall of the left header tank (7) above the partition member (11), and the left header is formed. A refrigerant inlet (17) through which the liquid-phase refrigerant flows into the supercooling section (3) is formed in a portion of the peripheral wall of the tank (7) below the partition member (11). Therefore, the section above the partition member (11) in the right header tank (6) is the condenser inlet header (18), and the section above the partition member (11) in the left header tank (7). Is the condensing section outlet header (19), the section below the partition member (11) in the left header tank (7) is the subcooling section inlet header (21), and the partition in the right header tank (6). The section below the member (11) is a subcooling unit outlet header (22).

  As shown in FIG. 3 and FIG. 4, the liquid receiver (4) is fixed to the left header tank (7) by brazing in a state where the axial direction is directed vertically, and has a cylindrical shape having upper and lower ends opened. An aluminum base member (23) and a cylindrical aluminum tank member (see FIG. 3) fixed to the base member (23) by brazing in a state where the axial direction is oriented vertically, and having a closed upper end and an open lower end. 24), and a synthetic resin plug (25) as a closing member that is removably fitted into the base member (23) and closes the lower end opening of the base member (23). The internal space communicates with the internal space of the base member (23).

  The base member (23) is formed of, for example, an aluminum bare material such as an extruded aluminum material, and has an internal thread portion (a vertical intermediate portion on the inner peripheral surface, here a portion slightly below the vertical central portion, here). 26) is provided. In a portion of the base member (23) above the female thread portion (26), a refrigerant inflow hole (27) communicating with the refrigerant outlet (16) of the condenser outlet header (19), and a supercooling unit inlet header (21). ) And a refrigerant outflow hole (28) communicating with the refrigerant inflow port (17) are formed at an interval in the vertical direction so that the refrigerant inflow hole (27) is located above. A lower part of the inner peripheral surface of the base member (23) below the female thread (26) is provided with a cylindrical lower sealing surface (29) having a diameter larger than the root diameter of the female thread (26). A cylindrical upper sealing surface (30) having a diameter smaller than the inner diameter of the female screw portion (26) is provided above the female screw portion (26).

  The portions corresponding to the refrigerant inflow holes (27) and the refrigerant outflow holes (28) on the outer peripheral surface of the base member (23) are brazed in tight contact with the outer surface of the left header tank (7) of the condenser (1), respectively. Fixing pieces (31) and (32) having partial cylindrical joint surfaces (31a) and (32a) are provided integrally. Both vertical edges (both vertical edges) of both fixing pieces (32) (32) are vertical. Both ends of the refrigerant inflow hole (27) open to the inner peripheral surface of the base member (23) and the joining surface (31a) of the upper fixing piece (31), and both ends of the refrigerant outflow hole (28) are connected to the base member (23). ) And the joint surface (32a) of the lower fixing piece (32). The upper fixing piece (31) has a joint surface (31a) on the outer surface of the left header tank (7) such that the refrigerant inflow hole (27) matches the refrigerant outlet (16) of the condenser outlet header (19). The lower fixing piece (32) is brazed, and the joining surface (32a) has a left header tank so that the refrigerant outflow hole (28) matches the refrigerant inflow port (17) of the subcooling section inlet header (21). It is brazed on the outer surface of (7).

  The outer peripheral surface of the base member (23) is a cylindrical surface having a smaller diameter than the outer peripheral surface of the other part of the base member (23), and is inserted into the lower end opening of the tank member (24). ) And a flat surface (34) connected to the lower end of the outer peripheral surface of the insertion portion (33). The flat surface (34) is annular, and is formed so as to extend radially outward from the outer peripheral surface of the insertion portion (33). The base member (23) is formed by cutting or threading an extruded shape having the same shape as the outer shape of the cross-sectional shape of the portion where the fixing pieces (31) and (32) are provided.

  The tank member (24) is formed of an aluminum bare material such as an extruded aluminum material, and has a cylindrical main body (35) having a longitudinal direction facing up and down and opening at both upper and lower ends, and a brazing material layer on one surface. And a closing member (36) that is formed from an aluminum brazing sheet and brazed to the upper end of the main body (35) to close the upper end opening of the main body (35).

  At the upper end of the outer peripheral surface of the main body (35) of the tank member (24), a partial cylindrical joint surface (37a) brazed in close contact with the outer surface of the left header tank (7) of the capacitor (1). The spacer portion (37) is integrally provided. The main body (35) is formed by performing a cutting process on an extruded material having the same shape as the outer shape of the cross-sectional shape of the portion where the spacer portion (37) is provided.

  The outer shape of the cross-sectional shape of the portion of the main body (35) of the tank member (24) where the spacer portion (37) is not provided is provided with both fixing pieces (31) and (32) of the base member (23). It has the same shape as the outer shape of the cross-sectional shape of the portion not present. Also, the outer shape of the cross-sectional shape of the portion of the main body (37) of the tank member (24) where the spacer portion (37) is provided, and the two fixing pieces (31) and (32) of the base member (23) are provided. The outer shape of the cross-sectional shape of the portion shown is the same.

  The base member (23) and the main body part (35) of the tank member (24) are configured such that the insertion part (33) of the base member (23) is inserted into the lower end opening of the main body part (35) of the tank member (24). A ring-shaped brazing material (38) shown in FIG. 4 is provided in a gap (39) between the lower end surface of the main body (35) of the tank member (24) and the flat surface (34) of the base member (23). It is brazed by forming the fillet (41).

  As shown in FIGS. 3 to 5, one of the base member (23) and the tank member (24) of the liquid receiver (4), here, the main body (35) of the tank member (24) A projection (42) projecting radially outward of the main body (35) is provided on the outer peripheral surface of the main body (35), and the tank member (24) is provided on the outer peripheral surface of the other member, here, the base member (23). A protruding piece (43) protruding to the side is provided, and a fitting recess (44) in which the protrusion (42) fits is formed on the protruding piece (43).

  The protruding piece (43) of the base member (23) is formed integrally with the upper fixing piece (31) so as to protrude upward, and has the same horizontal cross-sectional shape as the upper fixing piece (31), And, like the upper fixing piece (31), it has a partial cylindrical joining surface (43a) that is brazed in close contact with the outer surface of the left header tank (7), and the vertical side edges are vertical. Has become. The fitting concave portion (44) of the protruding piece (43) is formed in the protruding piece (43), and has one end opened to one of the protruding pieces (43), here, a side edge on the back side of the drawing of FIG. It consists of a notch (45). The upper and lower edges of the notch (45) are horizontal. In the illustrated embodiment, the lower edge of the notch (45) is at the same height position as the upper end of the upper fixing piece (31) and the flat surface (34). The lower edge may be located at a height above the upper end of the upper fixing piece (31) and the flat surface (34).

  The protrusion (42) of the tank member (24) is fitted in a notch (45) which becomes a fitting concave portion (44) of the projecting piece (43) of the base member (23), and the notch (45) Of the base member (23) and the tank member (24), the side edge of one of the tank members (24) on which the protrusion (42) is provided. The protruding end surface of the projection (42) does not interfere with the outer peripheral surface of the left header tank (7). In the illustrated embodiment, the protruding end surface of the projection (42) is a vertical flat surface and is located inside the notch (45). Instead, the protruding end surface of the protruding piece (43) may be flush with the joining surface (43a).

  The plug (25) is formed in a cylindrical shape by a synthetic resin, and a screw portion is provided at a vertically intermediate portion of the cylindrical outer peripheral surface of the plug (25) and below the refrigerant outflow hole (28). (47) is provided, and the male thread (47) is screwed into the female thread (26) of the base member (23), whereby the plug (25) is removably inserted into the base member (23). Have been. The upper end of the plug (25) is located at a height between the refrigerant inflow hole (27) and the refrigerant outflow hole (28). The plug (25) has a bottomed tool hole (48) that extends upward from the lower end face and into which a tool for turning the plug (25) is inserted.

  The plug (25) has a bottomed hole (49) extending downward from the upper end surface and having a lower end positioned below the refrigerant outflow hole (28), and has a bottomed hole (49) in the plug (25). A plurality of communication holes (51) are formed in the peripheral wall portion at intervals in the circumferential direction, and a filter (52) for filtering foreign matter is fixed to the plug (25) so as to cover the communication holes (51). I have. At least a part of the communication hole (51) in the vertical direction is located within the range of the refrigerant outflow hole (28) in the vertical direction. One annular O-ring groove (53) is formed in a portion of the outer peripheral surface of the plug (25) above the communication hole (51), and the O-ring (54) fitted in the O-ring groove (53). Thereby, the space between the upper sealing surface (30) of the base member (23) and the outer peripheral surface of the plug (25) is sealed. Further, two annular O-ring grooves (55) are formed in the outer peripheral surface of the plug (25) below the male thread (47) at intervals in the vertical direction, and the O-ring grooves (55) are formed. The space between the lower sealing surface (29) of the base member (23) and the outer peripheral surface of the plug (25) is sealed by an O-ring (56) fitted into the plug.

  Although not shown in the drawing, a portion above the plug (25) in the liquid receiver (4) is provided with a desiccant that has air permeability and liquid permeability, and has a longitudinal direction oriented vertically. An agent bag is arranged.

  In the car air conditioner having the condenser (1) having the above-described configuration, the high-temperature and high-pressure gas-phase refrigerant compressed by the compressor passes through the refrigerant inlet member (14) and the refrigerant inlet (12), and the right header tank (6) Into the condensing section inlet header (18), and condensed while flowing to the left in the heat exchange pipe (5) of the first heat exchange path (P1), and condensed to the condensing section outlet of the left header tank (7). It flows into the header (19). The refrigerant that has flowed into the condensing section outlet header (19) of the left header tank (7) enters the liquid receiver (4) through the header-side refrigerant outlet (16) and the refrigerant inflow hole (27).

  The refrigerant that has flowed into the receiver (4) is a gas-liquid mixed-phase refrigerant, and the liquid-phase refrigerant among the gas-liquid mixed-phase refrigerant collects in the lower part of the receiver (4) due to gravity, and the gas-phase refrigerant receives the liquid-phase refrigerant. It collects in the upper part of the vessel (4). The liquid-phase refrigerant enters the bottomed hole (49) of the plug (25), passes through the filter (52), passes through the refrigerant outflow hole (28) and the refrigerant inlet (17), and then the left header tank (7) Of the supercooling section entrance header (21).

  The refrigerant that has entered the supercooling section inlet header (21) of the left header tank (7) is supercooled while flowing to the right in the heat exchange pipe (5) of the second heat exchange path (P2). The refrigerant enters the subcooler outlet header (22) of the right header tank (6), flows out through the refrigerant outlet (13) and the refrigerant outlet member (15), and is sent to the evaporator via the expansion valve.

  The above-mentioned capacitor (1) is manufactured by, for example, a method described below.

  First, members constituting the header tanks (6) (7), heat exchange tubes (5), corrugated fins (8), side plates (9), refrigerant inlet members (14), refrigerant outlet members (15), base members (23), a main body (35) of the tank member (24), a closing member (36) of the tank member (24), and a plug (25) are prepared.

  Next, the members constituting the header tanks (6) and (7), the heat exchange tubes (5), the corrugated fins (8), the side plates (9), the refrigerant inlet member (14), and the refrigerant outlet member (15) are provided in a predetermined manner. Place and combine them. In addition, a brazing material is arranged in a predetermined portion.

  After the ring-shaped brazing material (38) is disposed around the insertion portion (33) of the base member (23), the insertion portion (33) of the base member (23) is inserted into the lower end opening of the main body (35). The ring-shaped brazing material (38) is inserted between the flat surface (34) of the base member (23) and the lower end surface of the main body (35). Further, a closing member (36) is arranged at the upper end of the main body (35) of the tank member (24).

  When inserting the insertion portion (33) of the base member (23) into the lower end opening of the main body (35), rotate the main body (35) counterclockwise in FIG. 5 from the position shown by the solid line in FIG. In this state, the projection (42) of the main body (35) is positioned outside the notch (45), which is the fitting recess (44), as shown by the chain line in FIG. Then, the main body (35) is rotated clockwise in FIG. 5, the projection (42) is fitted into the notch (45), which is the fitting concave (44), and the projection (42) is cut out (45). To the upper edge of the

  Next, members constituting the header tanks (6) (7), heat exchange tubes (5), corrugated fins (8), side plates (9), refrigerant inlet members (14), refrigerant outlet members (15), base members (23) The members constituting the header tanks (6) and (7) by heating the main body (35) and the closing member (36) of the tank member (24) and the closing member (36) to a certain temperature and heating the header tank. (6) (7) and heat exchange tube (5), heat exchange tube (5) and corrugated fin (8), corrugated fin (8) and side plate (9), and header tank (6) (7) and refrigerant In addition to brazing the inlet member (14) and the refrigerant outlet member (15), the main body (35) of the tank member (24) and the base member (23) are brazed using the ring-shaped brazing material (38). .

  Thereafter, the plug (25) is screwed into the base member (23). Thus, the capacitor (1) is manufactured.

  In the embodiment described above, the fitting recess (44) into which the projection (42) fits is formed in the protruding piece (43) and has one end opened to one of the side edges of the protruding piece (43). (45), but is not limited thereto, and the protrusion (42) and the fitting recess (44) rotate the base member (23) and the tank member (24) relatively around the central axis. If the projections (42) are provided in such a positional relationship that the projections (42) are fitted into the fitting recesses (44) and disengaged from the fitting recesses (44), the fitting recesses are provided. (44) may be formed of a through hole, or may be formed of a bottomed hole opened only on the projection (42) side.

  The capacitor according to the present invention is suitably used for a car air conditioner mounted on an automobile.

(1): Capacitor
(2): Condensing section
(3): Subcooling section
(4): Liquid receiver
(5): Heat exchange tube
(6) (7): Header tank
(16): Refrigerant outlet
(17): Refrigerant inlet
(19): Condenser outlet header
(21): Subcooling section entrance header
(23): Base member
(24): Tank material
(25): Plug
(27): Refrigerant inlet hole
(28): Refrigerant outflow hole
(31) (32): Fixed piece
(31a) (32a): Joint surface
(42): Projection
(43): Projecting piece
(43a): Joint surface
(44): Mating recess
(45): Notch
(P1) (P2): Heat exchange path

Claims (5)

Condensing section, a supercooling section provided below the condensing section, and a hollow liquid receiver provided between the condensing section and the supercooling section, and having a longitudinal direction oriented in the up-down direction. A plurality of heat exchange tubes oriented in the left-right direction and arranged at intervals in the vertical direction, and left and right ends of the total heat exchange tubes arranged in the left-right direction with the longitudinal direction oriented in the up-down direction The tank has a pair of header tanks connected to each other, and the liquid receiver has a cylindrical shape with upper and lower ends opened, and is fixed to one of the header tanks. A tank member fixed to the base member, and a closing member for closing a lower end opening of the base member. The base member and the tank member are joined in a partially fitted state. Capacitors Te,
A protrusion is provided on the outer peripheral surface of one of the base member and the tank member of the liquid receiver, and a protruding piece that protrudes toward the one member is also provided on the outer peripheral surface of the other member, A fitting recess in which the projection fits is formed on the protruding piece, and the projection is engaged with a side edge on the one of the upper and lower side edges of the fitting recess, and the projection and the fitting recess are Are provided in such a positional relationship that when the base member and the tank member are relatively rotated about the central axis, the protrusions are fitted into the fitting recesses and disengaged from the fitting recesses. The base member and the tank member are partially fitted together, and the base member is brazed to the tank member in a state where the protrusions are engaged with the one of the upper and lower side edges of the fitting recess on the one member side. Capacitors joined by A fitting recess is formed in the protruding piece, and one end is formed of a notch opened at a vertical side edge of the protruding piece, and the protrusion is formed on a side edge on the one member side among upper and lower side edges of the notch. The capacitor of claim 1 engaged. The projecting piece has a joining surface joined to the outer surface of the one header tank, and the projecting end surface of the projection is flush with the joining surface or inside the notch than the joining surface. 3. The capacitor of claim 2, wherein the capacitor is located. The base member is provided with two fixing pieces having a joining surface joined to the outer surface of the one header tank at an interval in the vertical direction, and the projecting piece is provided integrally with the upper fixing piece. 4. The capacitor according to claim 3, wherein: The condensing unit includes a condensing unit outlet header arranged with the longitudinal direction facing up and down, and a heat exchange path including a plurality of heat exchange tubes connected to the condensing unit outlet header at one longitudinal end, A heat exchange path comprising a subcooling section inlet header in which the subcooling section is arranged below the condensing section outlet header, and a plurality of heat exchange tubes having one longitudinal end connected to the subcooling section inlet header. The condenser outlet header and the supercooler inlet header are provided in one header tank to which the fixed piece of the base member is joined, and the refrigerant flows out of the condenser to the condenser outlet header. A coolant outlet is formed, a coolant inlet for allowing the coolant to flow from the receiver is formed in the supercooling section inlet header, and a coolant outlet of the condensing section outlet header of the condenser section is provided in the base member of the receiver. Refrigerant inlet holes and A refrigerant outlet hole communicating with the refrigerant inlet of the cooling part is formed at an interval in the vertical direction so that the refrigerant inlet hole is located upward, and the inner ends of the refrigerant inlet hole and the refrigerant outlet hole are opened in the base member. 5. The capacitor according to claim 4, wherein the outer end is open to the joint surface of the fixing piece.

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