JP2010196930A - Connecting device for heat exchanger - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a connecting device for a heat exchanger reducing the weight and cost. <P>SOLUTION: The connecting device 6 for the heat exchanger includes a first connecting member 46 comprising a forged product and a second connecting member 47 comprising a pressed product. The first connecting member 46 includes two refrigerant passages 48, 49 and screw holes 51. The second connecting member 47 is brazed to the first connecting member 46, and includes two refrigerant passages 54, 55 leading to the refrigerant passages 48, 49 of the first connecting member 46 and a through-hole 56 surrounding opening ends of the screw holes 51. The plurality of screw holes 51 of the first connecting member 46 are formed in the direction orthogonal to a line interconnecting the centers of both refrigerant passages 48, 49 of the first connecting member 46, leaving an interval. The screw holes 51 of the first connecting member 46 are formed between both refrigerant passages 48, 49, and the through-hole 56 of the second connecting member 47 is formed between both refrigerant passages 54, 55 of the second connecting member 47. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a connection device for a heat exchanger used in a heat exchanger such as an evaporator of a car air conditioner that is a refrigeration cycle mounted on an automobile or a condenser, for example.

  For example, as a connecting device for connecting an expansion valve, which is a connected tool, to an evaporator, a device formed by cutting an aluminum extruded product is known (see Patent Document 1). The connecting member described in Patent Document 1 is used by being brazed to an evaporator.

  However, the connection device described in Patent Document 1 has a problem that the weight increases and the cost increases.

JP-A-11-94488

  The objective of this invention is providing the connection apparatus for heat exchangers which can solve the said problem, can achieve weight reduction, and can reduce cost.

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

  1) a first connecting member made of a forged product and having two refrigerant passages and screw holes; and two refrigerants made of a press-formed product and brazed to the first connecting member and communicating with the refrigerant passage of the first connecting member A connection device for a heat exchanger, comprising: a second connection member having a through hole surrounding the opening end of the screw hole of the passage and the first connection member.

  2) The heat exchanger connection device according to 1), wherein a plurality of screw holes of the first connection member are formed at intervals in a direction orthogonal to a line connecting the centers of both refrigerant passages of the first connection member.

  3) The above 1) or 2 in which a screw hole is formed in a portion between both refrigerant passages of the first connecting member, and a through hole of the second connecting member is formed between both refrigerant passages of the second connecting member. The connection device for a heat exchanger as described in).

  4) The through hole of the second connecting member is a long hole extending in a direction orthogonal to the line connecting the centers of both refrigerant passages of the second connecting member, and the length of the through hole is the first connecting member. The heat exchanger connection device according to 3) above, which is longer than the inner diameters of the refrigerant passages and the refrigerant passages of the second connection member.

  5) A recess is formed in the second connecting member so that at least a part of the first connecting member in the thickness direction is fitted into the whole, and the first connecting member is fitted in the recess of the second connecting member. 2. The connection device for a heat exchanger according to any one of 1) to 4), wherein the connection device is brazed to the two connection members.

  6) A male part to be inserted into the female part of the connected device connected to the heat exchanger is provided in a portion around the refrigerant passage on the surface of the second connecting member facing away from the first connecting member. The connection device for a heat exchanger according to any one of 1) to 5) above.

  According to the connecting device of 1) and 2), since the first connecting member made of a forged product and the second connecting member made of a press-formed product are formed, the extruded product described in Patent Document 1 is cut. Compared with the connection device formed by doing so, the material is not wasted, the cost is reduced, and the weight can be reduced. Further, since the second connecting member has a through hole surrounding the open end of the screw hole of the first connecting member, the brazing material brazing the first connecting member and the second connecting member is formed at the peripheral portion of the through hole. As a result, the brazing material is prevented from entering the screw hole of the first connecting member.

  According to the connection device of 3), it is possible to prevent a short circuit of the refrigerant from one refrigerant passage to the other refrigerant passage in the first and second connection members.

  According to the connection device of 4), it is possible to reliably prevent the refrigerant from being short-circuited from one refrigerant passage to the other refrigerant passage in the first and second connection members.

1 is a partially cutaway perspective view showing an overall configuration of a heat exchanger according to an embodiment of the present invention. It is an AA line expanded sectional view of FIG. It is a BB line expanded sectional view of Drawing 1. It is the vertical sectional view seen from the right side cut by the portion of the 1st plate of the refrigerant in / out member. It is the vertical sectional view seen from the right side cut by the part of the 2nd plate of the refrigerant in / out member. It is the vertical sectional view seen from the right side cut by the portion of the intermediate plate of the refrigerant in / out member. It is CC line arrow line view of FIG. FIG. 2 is a partially enlarged exploded perspective view of a refrigerant inlet / outlet member portion of the evaporator of FIG. 1.

  Embodiments of the present invention will be described below with reference to the drawings. In this embodiment, the connection device according to the present invention is applied to the connection of an expansion valve to an evaporator.

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

  In the following description, the downstream side of the air flowing in the ventilation gap between adjacent heat exchange tubes (the direction indicated by the arrow X in FIG. 1, the right side in FIGS. 4 to 6) is the front side, and the opposite side is the front side. The term “rear” refers to the top, bottom, left and right (up and down, left and right in FIG. 1) when looking forward from the rear.

  FIG. 1 shows the overall configuration of the evaporator, and FIGS. 2 to 8 show the configuration of the main part of the evaporator.

  1 to 4, an evaporator (1) used in a car air conditioner using a chlorofluorocarbon refrigerant is composed of an aluminum first header tank (2) and an aluminum second header tank arranged at intervals in the vertical direction. (3), a heat exchange core (4) provided between the header tanks (2) and (3), a refrigerant inlet / outlet member (5) joined to the right end of the first header tank (2), An expansion valve connecting device (6) (heat exchanger connecting device) which is joined to the refrigerant inlet / outlet member (5) and used to attach an expansion valve (E) (connected device) (see the chain line in FIG. 4). Yes.

  The first header tank (2) is integrated with the refrigerant inlet header portion (7) located on the front side (downstream side in the ventilation direction) and the refrigerant inlet header portion (7) located on the rear side (upstream side in the ventilation direction). And a refrigerant outlet header portion (8). A refrigerant inlet (9) is provided at the right end of the refrigerant inlet header (7), and a refrigerant outlet (11) is provided at the right end of the refrigerant outlet header (8). A substantially U-shaped notch (12) is formed in the right end portion of the top wall (8a) of the refrigerant outlet header portion (8) when viewed from above (see FIG. 8). The second header tank (3) includes a first intermediate header portion (13) located on the front side and a second intermediate header portion (14) located on the rear side and integrated with the first intermediate header portion (13). And. The first intermediate header portion (13) and the second intermediate header portion (14) are formed by dividing the interior of the second header tank (5) into two front and rear spaces by a partition member (15). The inside of the first intermediate header portion (13) and the inside of the second intermediate header portion (14) are communicated with the partition member (15) through a plurality of communication ports (16) formed at intervals in the left-right direction. It has been.

  The heat exchange core section (4) has a heat exchange pipe array (18) (19) composed of a plurality of flat aluminum heat exchange pipes (17) with the width direction facing in the front-rear direction and spaced in the left-right direction. ) Are arranged in multiple rows in the front-rear direction, in this case two rows, the ventilation gap between adjacent heat exchange tubes (17) in each heat exchange tube row (18) (19) and heat exchange at both left and right ends Aluminum corrugated fins (21) are arranged on the outside of the pipe (17) so as to straddle the heat exchange pipes (17) of both the front and rear heat exchange pipe rows (18) (19). The aluminum side plates (22) are respectively disposed outside the corrugated fins (21) at the left and right ends and brazed to the corrugated fins (21).

  The heat exchange pipe (17) of the front heat exchange pipe row (18) is formed between the refrigerant inlet header section (7) of the first header tank (2) and the first intermediate header section (13) of the second header tank (3). The both upper and lower end portions are connected to the refrigerant inlet header portion (7) and the first intermediate header portion (13). The heat exchange pipe (17) of the rear heat exchange pipe row (19) includes a refrigerant outlet header section (8) of the first header tank (2) and a second intermediate header section (14) of the second header tank (3). The refrigerant outlet header part (8) and the second intermediate header part (14) are connected to both upper and lower ends thereof. Then, the refrigerant inlet header portion (7) and the refrigerant outlet are formed by the heat exchange tubes (17) of the front and rear heat exchange tube rows (18) and (19) and the first and second intermediate header portions (13) and (14). A refrigerant circulation path is formed through the header portion (8).

  As shown in FIGS. 2 to 8, the refrigerant inlet / outlet member (5) has a vertical aluminum first plate (23) located on the left side (first header tank (2) side) and a vertical shape located on the right side. The aluminum second plate (24) and the vertical aluminum intermediate plate (25) positioned between the first plate (23) and the second plate (24) are laminated and joined together. And joined across the right end of the refrigerant inlet header (7) and the refrigerant outlet header (8) of the first header tank (2). The refrigerant inlet / outlet member (5) has one end leading to the refrigerant inlet (9) of the refrigerant inlet header (7) and the other end opened to the rear edge of the refrigerant inlet / outlet member (5); An outflow path (27) having one end communicating with the refrigerant outlet (11) of the refrigerant outlet header (8) and the other end opened at the rear edge of the refrigerant inlet / outlet member (5) is provided. The opening to the rear edge of the refrigerant inlet / outlet member (5) in the inflow passage (26) is called an inlet (26a), and the opening to the rear edge of the refrigerant inlet / outlet member (5) in the outlet passage (27) is the outlet (27a ).

  The first plate (23) of the refrigerant inlet / outlet member (5) is connected to the first communication port (28) leading to the refrigerant inlet (9) of the refrigerant inlet header (7) and the refrigerant outlet (11) of the refrigerant outlet header (8). ) Leading to the second communication port (29), one end of which is away from the first and second communication ports (28) and (29), and the other end opened to the rear edge of the first plate (23) The road first outer bulge portion (31) and one end at a position away from the first and second communication ports (28) and (29) and the other end at the rear edge of the first plate (23) An outflow passage first outer bulge portion (32) is formed at an upper portion than the other end opening of the first inflow passage bulge portion (31).

  The second plate (24) of the refrigerant inlet / outlet member (5) has one end at a position away from the first and second communication ports (28) and (29) of the first plate (23) and the other end of the first plate (23). (23) the second outward bulging portion for the inflow passage opened at the rear edge of the second plate (24) at the same height as the other end of the first outward bulging portion (31) for the inflow passage ( 33), one end is at a position corresponding to the first communication port (28) of the first plate (23) and the other end is the second communication port (29) of the first plate (23) and the second outside for the inflow passage The third outward bulge portion (34) for the inflow passage located at a position away from the lateral bulge portion (33), and one end thereof is located at a position corresponding to the second communication port (29) of the first plate (23). In addition, the second outer bulge for the outflow passage whose other end is opened at the rear edge of the second plate (24) at the same position as the first outward bulge portion (32) for the outflow passage of the first plate (23). A portion (35) is formed.

  One end on the intermediate plate (25) of the refrigerant inlet / outlet member (5) is located at the rear edge of the intermediate plate (25) at the same position as the first outward bulging portion (31) for the inflow passage of the first plate (23). Open and let the first plate (23) pass through the inflow path first outer bulge part (31) and the second plate (24) through the inflow path second outer bulge part (33). The first notch (36), the first outer bulge portion (31) for the inflow passage of the first plate (23) and the third outer bulge portion (34) for the inflow passage of the second plate (24) ) In the first through hole (37) to be passed through, the first communication port (28) of the first plate (23) and the third outward bulging portion (34) for the inflow passage of the second plate (24) A second through hole (38) through which one end opens at the rear edge of the intermediate plate (25) at the same position as the first outer bulge (32) for the outflow passage of the first plate (23). And the second outer bulge for the outflow passage of the first plate (23) and the second outer bulge for the outflow passage of the second plate (24). A second notch (39) that passes through the inside of the portion (35), and a second communication port (29) of the first plate (23) and a second outward bulging portion for the outflow passage of the second plate (24) A third through hole (41) is formed through the inside of (35).

  The left part of the first plate (23) is inserted into the refrigerant inlet header portion (7) of the first header tank (2) through the refrigerant inlet (9) around the first communication port (28). The part (23a) is integrally formed over the entire circumference. The portion of the first plate (23) around the second communication port (29) except for the upper end portion is provided in the refrigerant outlet header portion (8) of the first header tank (2) through the refrigerant outlet (11). A left projecting portion (23b) inserted into is integrally formed. The first outward bulging portion (31) for the inflow passage of the first plate (23) includes a vertical portion (31a) extending upward from a position slightly above the first communication port (28), and a vertical portion (31a). And a horizontal portion (31b) extending rearward and reaching the rear edge of the first plate (23). The first outer bulging portion (32) for the outflow passage of the first plate (23) is located above the horizontal portion (31b) of the first outer bulging portion (31) for the inflow passage. ) A portion extending horizontally forward from a position above the first outward bulging portion (31) for the inflow passage at the rear edge is inclined forward and obliquely downward. The front end portion of the first outward bulge portion (32) for the outflow passage is located at the center portion in the front-rear direction of the horizontal portion (31b) of the first outward bulge portion (31) for the inflow passage. The first plate (23) is formed with a vertical third outflow bulging portion (42) for the outflow passage that extends upward and continues to the second communication port (29). The upper end of the outflow passage third outer bulge portion (42) is at a height slightly below the horizontal portion (31b) of the first inflow passage bulge portion (31). The shape of the lower edge of the third outward bulging portion (42) for the outflow passage is such that it matches the shape of the notch (12) of the refrigerant outlet header portion (8) of the first header tank (2). It has become. Further, the outer peripheral surface of the lower end of the third outward bulging portion (42) for the outflow passage is connected to and cut off from the left protruding portion (23b) around the second communication port (29) of the first plate (23). A left projecting portion (42a) inserted into the refrigerant outlet header portion (8) through the notch (12) is integrally formed.

  The second outward bulging portion (33) for the inflow passage of the second plate (24) is the same as the horizontal portion (31b) of the first outward bulging portion (31) for the inflow passage of the first plate (23). In the height position, it extends horizontally forward from the rear edge of the second plate (24), and its front end is located slightly behind the second outward bulging portion (35) for the outflow passage. The third outward bulging portion (34) for the inflow passage of the second plate (24) has a vertical shape extending upward from a position corresponding to the first communication port (28) of the first plate (23). The upper end portion of the third outward bulging portion (34) for the inflow passage is located above the lower end of the vertical portion (31a) of the first outward bulging portion (31) for the inflow passage of the first plate (23). positioned. The second outwardly bulging portion (35) for the outflow passage of the second plate (24) extends upward from a position corresponding to the second communication port (29) of the first plate (23), and the second inflow passage second. A vertical portion (35a) extending upward from the outward bulge portion (33), and a horizontal portion (35b) extending to the rear end of the first plate (23) and extending rearward from the upper end of the vertical portion (35a). ). The front edge of the upper part of the vertical part (35a) extends forward to increase the flow path area. The upper edge of the portion near the front end of the horizontal portion (35b) is inclined forward to match the upper edge of the portion of the first plate (23) from the front end of the first outward bulge portion (32) for the outflow passage. Inclined downward.

  The first notch (36) of the intermediate plate (25) extends horizontally forward from the rear edge of the intermediate plate (25), and its front end is the second outer side for the inflow passage of the second plate (24). It is in the same position as the front end of the side bulge (33). The shape of the first notch (36) matches the shape of the second outward bulging portion (33) for the inflow passage as viewed from the side. The first through hole (37) of the intermediate plate (25) has a lower end portion of the vertical portion (31a) of the first outward bulging portion (31) for the inflow passage of the first plate (23) and the second plate (24 ) At the upper end of the third outward bulging portion (34) for the inflow passage when viewed from the side. The second through hole (38) of the intermediate plate (25) is located at a position corresponding to the first communication port (28) of the first plate (23). And the part between the 1st through-hole (37) and the 2nd through-hole (38) in the intermediate | middle plate (25) is excised, and both through-holes (37) ( 38) is communicated, whereby the second through hole (38) is integrated with the first through hole (37). The shape of the first through hole (37), the second through hole (38), and the cut-out portion (43) is the same as that of the third outward bulge portion (34) for the inflow passage of the second plate (24). It matches the shape seen from the above. The second notch (39) of the intermediate plate (25) is horizontally level forward from the same height position as the rear end of the first outflow channel (32) for the outflow passage of the first plate (23). The portion near the front end is inclined forward and obliquely downward, and the front end portion of the second notch (39) is at the same position as the front end portion of the first outward bulge portion (32) for the outflow passage. The shape of the 2nd notch (39) corresponds with the shape which looked at the 1st outside bulge part (32) for outflow passages from the side. The third through hole (41) of the intermediate plate (25) is located at a position corresponding to the second communication port (29) of the first plate (23). The intermediate plate (25) has a second outer bulge for the outflow passage of the second plate (24) and an upper end portion of the third outer bulge portion (42) for the outflow passage of the first plate (23). A fourth through hole (44) is formed through the vertical portion (35a) of the vertical portion (35a) in the portion (35). And the part between the 3rd through-hole (41) and the 4th through-hole (44) in the intermediate | middle plate (25) is excised, and both through-holes are made to pass through the said excision part (45). Thus, the fourth through hole (44) is integrated with the third through hole (41).

  And the 1st communicating port (28) of the 1st plate (23), the 1st outward bulge part for inflow passages (31), and the 2nd outward bulge part for inflow passages of the 2nd plate (24) ( 33) and the third outward bulging portion (34) for the inflow passage, the first notch (36), the first through hole (37), the second through hole (38) and the cut portion of the intermediate plate (25). (43) forms an inflow path (26) in the refrigerant inlet / outlet member (5), the second communication port (29) of the first plate (23), the first outer bulging portion (32) for the outflow path, and Third outflow portion (42) for the outflow passage, second outflow passage portion (35) for the outflow passage of the second plate (24), and second notch (39) of the intermediate plate (25) The third through hole (41), the fourth through hole (44) and the cut portion (45) form an outflow path (27) in the refrigerant inlet / outlet member (5), and the inflow path (26) and the outflow path (27) intersects the interior without communication.

  In the refrigerant inlet / outlet member (5), the left protrusion (23a) around the first communication port (28) of the first plate (23) is inserted into the refrigerant inlet header (7) through the refrigerant inlet (9). In addition, the left protrusion (23b) around the second communication port (29) of the first plate (23) is inserted into the refrigerant outlet header (8) through the refrigerant outlet (11), and further the first plate In the state where the left protruding part (42a) at the lower end edge of the third outward bulging part (42) for the outflow passage of (23) is inserted into the refrigerant outlet header part (8) through the notch (12). The first header tank (2) is brazed.

  The expansion valve connecting device (6) includes a vertically long first connecting member (46) made of an aluminum forged product, and a vertically long circular shape made of an aluminum press-molded product and brazed to the first connecting member (46). It consists of a 2nd connection member (47).

  In the first connecting member (46), an inlet-side refrigerant passage (48) and an outlet-side refrigerant passage (49) are formed at intervals in the vertical direction so that the former is positioned below. The cross-sectional shape of both refrigerant passages (48) and (49) is circular. A space between the refrigerant passages (48) and (49) in the first connection member (46) is perpendicular to the line connecting the centers of the refrigerant passages (48) and (49) of the first connection member (46). A plurality of, here, two through screw holes (51) are formed. In addition, the refrigerant inlet / outlet member (5) is formed on the rear surface of the first connecting member (46) (the surface facing away from the second connecting member (47)) around the refrigerant passages (48) and (49). Entry male part (52) inserted into the inlet (26a) (female part) of the inflow passage (26) and outlet male part inserted into the outlet (27a) (female part) of the outflow passage (27) A portion (53) is formed.

  The second connecting member (47) includes an inlet-side refrigerant passage (54) and an outlet-side refrigerant passage (55) communicating with the inlet-side refrigerant passage (48) and the outlet-side refrigerant passage (49) of the first connecting member (46). However, it is formed at intervals in the vertical direction so that the former is positioned below. Between the refrigerant passages (54) and (55) in the second connecting member (47), the right and left direction (perpendicular to a line connecting the centers of the refrigerant passages (54) and (55) of the second connecting member (47)). A through hole (56) that is long in the direction) and surrounds the two screw holes (51) of the first connecting member (46) is formed. The length in the left-right direction of the through hole (56) is the inner diameter of the refrigerant passages (48) (49) of the first connection member (46) and the refrigerant passages (54) (55) of the second connection member (47). Longer than. The front surface (one surface) of the second connection member (47) is formed with a recess (57) in which a part in the thickness direction of the first connection member (46) fits entirely, and the first connection member (46) The substantially half portion on the rear side is brazed to the second connection member (47) in a state of being fitted in the recess (57) of the second connection member (47). Further, a high-pressure refrigerant of the expansion valve (E) is provided in a portion around the inlet-side refrigerant passage (54) on the rear surface of the second connecting member (47) (the surface facing the opposite side of the first connecting member (46)). An entry-side male part (58) inserted into the flow path (E1) (female part) is formed, and the low-pressure refrigerant flow path (E) of the expansion valve (E) is also formed around the outlet refrigerant path (55). E2) An outgoing male part (59) to be inserted into the female part is formed.

  Then, the expansion valve connecting device (6) is constructed such that the inlet-side male part (52) of the first connecting member (46) is inserted into the inlet (26a) of the inflow path (26) of the refrigerant inlet / outlet member (5). The refrigerant inlet / outlet member (5) is brazed to the inlet / outlet member (5), and the outlet male part is also inserted into the outlet (27a) of the outflow passage (27) and brazed to the refrigerant inlet / outlet member (5). It is fixed to.

The evaporator (1) configured as described above constitutes a refrigeration cycle that uses a chlorofluorocarbon refrigerant together with a compressor, a condenser as a refrigerant cooler, and an expansion valve (E), and is mounted on a vehicle, for example, an automobile, as a car air conditioner. At this time, the expansion valve (E) is connected to the expansion valve connection device (6) such that the low-pressure refrigerant flow path (E2) is located above and the high-pressure refrigerant flow path (E1) is located below. During the cooling operation, the gas-liquid mixed phase two-phase refrigerant that has passed through the high-pressure refrigerant flow path (E1) of the compressor, the condenser, and the expansion valve (E) is connected to both connection members (47) and (46) of the expansion valve connection device (6). ) Enters the inflow path (26) from the inlet (26a) at the rear edge of the refrigerant inlet / outlet member (5) through the inlet side refrigerant path (54), (48), flows through the inflow path (26), The refrigerant flows from the first communication port (28) through the refrigerant inlet (9) of the first header tank (2) into the refrigerant inlet header (7). The refrigerant flowing into the refrigerant inlet header section (7) is divided and flows into the heat exchange pipe (17) of the front heat exchange pipe array (18). The refrigerant that has flowed into the heat exchange pipe (17) of the front heat exchange pipe row (18) flows downward in the heat exchange pipe (17), and the first intermediate header portion (13) of the second header tank (3). Get inside. The refrigerant that has entered the first intermediate header portion (13) passes through the communication port (16) and enters the second intermediate header portion (14). The refrigerant that has entered the second intermediate header (14) is divided and flows into the heat exchange pipe (17) of the rear heat exchange pipe row (19). The refrigerant flowing into the heat exchange pipe (17) of the rear heat exchange pipe row (19) flows upward in the heat exchange pipe (4) and flows into the refrigerant outlet header portion (8) of the first header tank (2). Get inside. The refrigerant that has entered the refrigerant outlet header (8) flows to the right in the refrigerant outlet header (8), passes through the refrigerant outlet (11) of the first header tank (2), and passes through the second communication port (29). ) Enters the outflow path (27) of the refrigerant inlet / outlet member (5). The refrigerant that has entered the outflow passage (27) flows through the outflow passage (27), out of the outlet (27a) at the rear edge of the refrigerant inlet / outlet member (5), and is connected to both connection members of the expansion valve connecting device (6). (46) Enter the low pressure refrigerant flow path (E2) of the expansion valve (E) through the outlet side refrigerant passages (49) and (55) of (47) and pass through the low pressure refrigerant flow path (E2) to the compressor. Sent.
While the refrigerant flows in the heat exchange pipe (17), heat exchange is performed with air (see arrow X in FIG. 1) passing through the ventilation gap between the adjacent heat exchange pipes (17). And then leak.

  The connection device of the present invention includes a refrigerant inlet header section and a refrigerant outlet header section arranged side by side in the front-rear direction, and a refrigerant circulation path that passes through both header sections. Consists of a header part and a plurality of heat exchange tubes, between the refrigerant inlet header part and the intermediate header part arranged opposite to each other, between the refrigerant outlet header part and the intermediate header part arranged opposite to each other, In addition, at least one row of heat exchange tube groups composed of a plurality of heat exchange tubes arranged at intervals is provided between the intermediate header portions arranged to face each other, and these heat exchange tube groups are configured. Both ends of the heat exchange pipe are connected to opposite header sections, a refrigerant inlet is formed at one end of the refrigerant inlet header section, and a refrigerant is installed at the same end as the refrigerant inlet in the refrigerant outlet header section. It is also applicable to an evaporator of a type in which an opening is formed and the refrigerant flowing into the refrigerant inlet header portion from the refrigerant inlet returns to the refrigerant outlet header portion through the refrigerant circulation path and is sent out from the refrigerant outlet. .

  In the connecting device according to the present invention, a plurality of flat hollow bodies formed by brazing the peripheral portions with a pair of plate-shaped plates facing each other are arranged in parallel and arranged side by side in the front-rear direction. A refrigerant inlet header section, a refrigerant outlet header section, a refrigerant turn section that is spaced from both header sections, a plurality of refrigerant forward refrigerant distribution sections that communicate the refrigerant inlet header section and the refrigerant turn section, and a refrigerant A plurality of refrigerant return side refrigerant circulation portions that communicate the outlet header portion and the refrigerant turn portion, and a refrigerant inlet is formed at one end of the refrigerant inlet header portion and at the same end as the refrigerant inlet in the refrigerant outlet header portion A refrigerant outlet is formed, and the refrigerant flowing into the refrigerant inlet header portion from the refrigerant inlet passes through the refrigerant forward refrigerant circulation portion to the refrigerant turn portion, where the flow direction is changed to pass through the refrigerant return side refrigerant circulation portion. Returning to the refrigerant outlet header section Te is also applicable to a so-called laminated evaporator that going on format to be sent out from the refrigerant outlet.

  The connection device for a heat exchanger according to the present invention is suitably used as a connection device for connecting an expansion valve to an evaporator constituting a car air conditioner.

(6): Expansion valve connection device (connection device for heat exchanger)
(46): First connecting member
(47): Second connecting member
(48): Entry side refrigerant passage
(49): Outlet refrigerant passage
(51): Screw hole
(54): Entry side refrigerant passage
(55): Outlet refrigerant passage
(56): Through hole
(57): Recess
(58): Entering male part
(59): Outer male part
(E): Expansion valve (E)
(E1): High-pressure refrigerant flow path (female part)
(E2): Low-pressure refrigerant flow path (female part)

Claims (6)

A first joint member made of a forged product and having two refrigerant passages and screw holes; two refrigerant passages made of a press-formed product and brazed to the first connecting member and communicating with the refrigerant passage of the first joint member; A connection device for a heat exchanger comprising a second connection member having a through hole surrounding an open end of a screw hole of the first connection member. The connection device for a heat exchanger according to claim 1, wherein a plurality of screw holes of the first connection member are formed at intervals in a direction orthogonal to a line connecting the centers of both refrigerant passages of the first connection member. The screw hole is formed in the part between both refrigerant paths of the 1st connection member, The through-hole of the 2nd connection member is formed between both the refrigerant paths of the 2nd connection member. Connection device for heat exchanger. The through hole of the second connection member is a long hole extending in a direction orthogonal to the line connecting the centers of both refrigerant passages of the second connection member, and the length of the through hole is the length of both of the first connection members. The connection device for a heat exchanger according to claim 3, wherein the refrigerant passage and the second connecting member are longer than the inner diameters of the refrigerant passages. The second connection member is formed with a recess in which at least a part of the first connection member in the thickness direction is fitted entirely, and the second connection is made in a state where the first connection member is fitted in the recess of the second connection member. The heat exchanger connection device according to any one of claims 1 to 4, wherein the heat exchanger connection device is brazed to the member. The male part inserted in the female part of the to-be-connected tool connected to a heat exchanger is provided in the circumference | surroundings of the refrigerant path in the surface which faced the opposite side to the 1st connection member of the 2nd connection member. The connection apparatus for heat exchangers in any one of Claims 1-5.

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