JP2011117699A - Heat exchanger - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat exchanger which allows a connecting device therefor to be installed nearby. <P>SOLUTION: An evaporator is equipped with: a refrigerant taking-in/out member 5 having stacked first plate 21 and second plate 22; and an expansion valve mounting member 6 having refrigerant passages 6a, 6b opened at both ends. An inflow passage 24 and an outflow passage 25 are formed between both plates 21, 22 of the refrigerant taking-in/out member 5 by expanding both plates 21, 22 outward. Fitting projecting sections 46, 47 fitted to end openings of the inflow passage 24 and the outflow passage 25 of the refrigerant taking-in/out member 5, are respectively disposed around one end opening of each of the refrigerant passages 6a, 6b of the expansion valve mounting member 6. Engagement projecting sections 44, 45 and engagement recessed sections 48, 49 fitted to each other, are formed between faces facing the inside of the inflow passage 24 and the outflow passage 25 of both plates 21, 22 of the refrigerant taking-in/out member 5, and outer peripheral faces of the fitting projecting sections 46, 47 of the expansion valve mounting member 6. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a heat exchanger suitably used as an evaporator of a car air conditioner that is a refrigeration cycle mounted on an automobile, for example.

  As an evaporator that can be reduced in size, weight, and performance, the applicant previously has a refrigerant inlet header portion and a refrigerant outlet header portion arranged side by side in the ventilation direction, and a refrigerant circulation path that passes through both header portions. A first intermediate header portion disposed opposite to the refrigerant inlet header portion and a second intermediate portion disposed opposite the refrigerant outlet header portion on the rear side of the first intermediate header portion. A plurality of heat exchange tubes disposed between the header portion, the refrigerant inlet header portion and the first intermediate header portion, and between the refrigerant outlet header portion and the second intermediate header portion, A refrigerant inlet is formed at one end of the header part, and a refrigerant outlet is formed at the same end as the refrigerant inlet in the refrigerant outlet header part. The refrigerant flowing from the refrigerant inlet into the refrigerant inlet header part passes through the refrigerant circulation path. The evaporator is configured to return to the refrigerant outlet header and be sent out from the refrigerant outlet, and a pipe joint plate having a short cylindrical refrigerant inflow portion leading to the refrigerant inlet and a short cylindrical refrigerant outflow portion leading to the refrigerant outlet, The refrigerant inlet header and the refrigerant outlet header are joined to each other, the end of the refrigerant inlet pipe is inserted and joined to the refrigerant inflow part, and the refrigerant outlet pipe having a larger diameter than the refrigerant inlet pipe is joined to the refrigerant outflow part. The evaporator which the diameter reduction part formed in the edge part was inserted and joined was proposed (refer patent document 1).

  Although not shown, in the evaporator described in Patent Document 1, the refrigerant inlet pipe and the refrigerant outlet pipe are bent to the upstream side in the ventilation direction, and the expansion valve as a heat exchanger connecting device straddling the distal ends of both pipes An attachment member is joined, and an expansion valve whose opening degree is adjusted is attached to the expansion valve attachment member based on the temperature and pressure of the refrigerant that has flowed out of the refrigerant outlet header portion and has flowed through the refrigerant outlet pipe. ing.

  However, in the evaporator described in Patent Document 1, there is a limit to reducing the bend radii of the refrigerant inlet pipe and the refrigerant outlet pipe for the convenience of bending, so the expansion valve mounting member should be installed near the evaporator. There is a problem that the position of the expansion valve is far from the evaporator.

JP 2005-164226 JP

  The objective of this invention is providing the heat exchanger which can solve the said problem and can install the connection apparatus for heat exchangers near.

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

1) It is provided with a refrigerant inlet header portion and a refrigerant outlet header portion arranged side by side in the ventilation direction, and a refrigerant circulation path through both header portions, and a refrigerant inlet is formed at one end of the refrigerant inlet header portion, A refrigerant outlet is formed at the same end as the refrigerant inlet in the refrigerant outlet header, so that the refrigerant flowing into the refrigerant inlet header from the refrigerant inlet returns to the refrigerant outlet header through the refrigerant circulation path and is sent out from the refrigerant outlet. In the heat exchanger
A refrigerant inlet / outlet member having the first and second plates stacked and joined across the refrigerant inlet header portion and the refrigerant outlet header portion, a refrigerant passage having both ends opened, and the refrigerant inlet / outlet member A connecting device for a heat exchanger that is joined, and between the plates of the refrigerant inlet / outlet member, one end communicates with the refrigerant inlet of the refrigerant inlet header and the other end opens at one side edge of the refrigerant inlet / outlet member. At least one of the inflow path and the outflow path that opens at the side edge where the inflow path of the refrigerant inlet / outlet member is opened and the other end communicates with the refrigerant outlet of the refrigerant outlet header A fitting convex portion is provided around one end opening of each refrigerant passage of the connection device for a heat exchanger, and fitted into the other end opening of the inlet / outlet passage of the refrigerant inlet / outlet member. An engaging convex portion and an engaging concave portion that are fitted to each other are formed between the surfaces of the two plates of the member facing the inflow passage and the outflow passage and the outer peripheral surface of the fitting convex portion of the connection device for a heat exchanger. Heat exchanger.

  2) The first and second plates of the refrigerant inlet / outlet member are respectively formed with an outward bulging portion for the inflow passage and an outward bulging portion for the outflow passage, and the outer peripheral surface of the fitting convex portion of the heat exchanger connecting device. Between both sides in the stacking direction of both plates of the refrigerant inlet / outlet member and the inner surface of the top portion in the bulging direction of the outer bulging portion for the inflow passage and the outer bulging portion for the outflow passage of both plates of the refrigerant inlet / outlet member In addition, the heat exchanger according to 1) above, wherein an engaging convex portion and an engaging concave portion which are fitted to each other are formed.

  3) An intermediate plate is interposed between the first plate and the second plate of the refrigerant inlet / outlet member, and the intermediate plate is joined to the first plate and the second plate, and the inflow passage and the outflow passage are connected to the intermediate plate. Through the outer bulges for the inflow passages of the first and second plates and the outer bulges for the outflow passages of the first and second plates so that they cross each other when viewed from the stacking direction of all the plates. The heat exchanger according to 2) above, wherein a notch and a through hole are formed.

  4) The first plate and the second plate of the refrigerant inlet / outlet member are respectively formed with an outward bulging portion for the inflow passage and an outward bulging portion for the outflow passage, and the outer peripheral surface of the fitting convex portion of the connecting device for heat exchanger In both sides of the refrigerant inlet / outlet member in the direction perpendicular to the stacking direction of both plates, groove-shaped engaging recesses extending in the stacking direction and open at both ends are formed. The heat exchanger according to 1) above, wherein the engagement convex portion is formed so as to straddle the inner surface of the side bulge portion and the inner surface of the outflow passage outer bulge portion.

  5) An intermediate plate is interposed between the first plate and the second plate of the refrigerant inlet / outlet member, and the intermediate plate is joined to the first plate and the second plate, and the inflow passage and the outflow passage are connected to the intermediate plate. Through the outer bulges for the inflow passages of the first and second plates and the outer bulges for the outflow passages of the first and second plates so that they cross each other when viewed from the stacking direction of all the plates. Notches and through-holes to be formed are formed, and on both side edges of the notches forming end portions on the heat exchanger connecting device side of the inflow and outflow passages in the intermediate plate, the fitting convex portions of the heat exchanger connecting device are formed. 4. The heat exchanger according to 4) above, wherein an engagement convex portion that fits into the engagement concave portion is formed.

  6) The first plate and the second plate of the refrigerant inlet / outlet member are respectively formed with an outward bulge portion for the inflow passage and an outward bulge portion for the outflow passage, and the outer peripheral surface of the fitting convex portion of the connecting device for heat exchanger Engaging protrusions are formed on both sides of the refrigerant inlet / outlet member in the direction orthogonal to the stacking direction of both plates, and the inner surfaces of the inlet / outlet bulges of the plates of the refrigerant inlet / outlet member and the outlet bulge The heat exchanger according to 1) above, wherein an engaging recess is formed so as to straddle the inner surface of the protruding portion.

  7) An intermediate plate is interposed between the first plate and the second plate of the refrigerant inlet / outlet member, and the intermediate plate is joined to the first plate and the second plate, and the inflow passage and the outflow passage are connected to the intermediate plate. Through the outer bulges for the inflow passages of the first and second plates and the outer bulges for the outflow passages of the first and second plates so that they cross each other when viewed from the stacking direction of all the plates. Notches and through-holes to be formed are formed, and on both side edges of the notches forming end portions on the heat exchanger connecting device side of the inflow and outflow passages in the intermediate plate, the fitting convex portions of the heat exchanger connecting device are formed. The heat exchanger according to 6) above, wherein an engagement recess into which the engagement projection is fitted is formed.

  8) The fitting convex part is integrally formed in the connecting device for heat exchanger, and the opening of the one end fitting convex part of the refrigerant passage of the connecting device for heat exchanger is opened in the above 1) to 7) a heat exchanger according to any one of the house.

  9) The heat exchanger connecting device includes a block-shaped main body and two cylindrical bodies fixed in a penetrating manner to the block-shaped main body, and the cylindrical body serves as a refrigerant passage, and the block in the cylindrical body. The heat exchanger according to any one of 1) to 7) above, wherein a portion protruding from the main body is a fitting convex portion.

  According to the heat exchangers 1) to 9), the refrigerant inlet / outlet member having the first and second plates stacked and joined across the refrigerant inlet header part and the refrigerant outlet header part, and both ends And a heat exchanger connecting device joined to the refrigerant inlet / outlet member. One end of the refrigerant inlet / outlet member communicates with the refrigerant inlet of the refrigerant inlet header portion. An inflow path whose end is opened at one side edge of the refrigerant inlet / outlet member, and an outflow path whose one end communicates with the refrigerant outlet of the refrigerant outlet header part and whose other end opens at the side edge of the refrigerant inlet / outlet member where the inflow path is opened Is formed by expanding at least one of the plates outward, and the other end opening of the inlet / outlet passage of the refrigerant inlet / outlet member is formed around the one end opening of each refrigerant passage of the connection device for heat exchanger. Fit inside Therefore, it is not necessary to use a bent pipe like the evaporator described in Patent Document 1. Therefore, the connection device for heat exchangers can be installed near the heat exchanger. And when the heat exchanger of said 1) -9) is applied, for example to an evaporator, compared with the evaporator of patent document 1, the expansion valve attachment member as a connection device for heat exchangers is near the evaporator. It becomes possible to install, and the position of the expansion valve is also close to the evaporator.

  In addition, fitting protrusions that fit into the other end openings of the inlet and outlet passages of the refrigerant inlet / outlet member are provided around one end openings of the respective refrigerant passages of the heat exchanger connection device. Between the surface facing the inflow path and the outflow path and the outer peripheral surface of the fitting convex part of the heat exchanger connecting device, the engaging convex part and the engaging concave part that fit each other are formed. At the time of manufacture of the exchanger, it is possible to temporarily fix the heat exchanger connecting device to the refrigerant inlet / outlet member by temporarily fixing both plates of the refrigerant inlet / outlet member with an appropriate means. Compared with the case of temporarily fixing to the refrigerant inlet / outlet member by simple means, the workability is improved.

1 is a partially cutaway perspective view showing an overall configuration of an evaporator to which a heat exchanger according to the present invention is applied. FIG. 2 is a partially cut-away vertical sectional view seen from the right side, cut at a portion of a first plate of a refrigerant inlet / outlet member in the evaporator of FIG. 1. It is the horizontal sectional view which expanded the portion of the fitting convex part of an expansion valve attachment member. It is a disassembled perspective view which shows the refrigerant | coolant inlet / outlet member and expansion valve attachment member of the evaporator of FIG. It is a disassembled perspective view which shows the structure of the principal part of the refrigerant | coolant in / out member and expansion valve attachment member of the evaporator of FIG. It is a figure equivalent to FIG. 3 which shows the 1st modification of a refrigerant | coolant in / out member and an expansion valve attachment member. FIG. 6 is a view corresponding to FIG. 5 illustrating a first modification of the refrigerant inlet / outlet member and the expansion valve mounting member. It is a vertical sectional view showing the composition of the principal part of the 2nd modification of a refrigerant in / out member and an expansion valve attachment member. It is a figure equivalent to FIG. 5 which shows the 2nd modification of a refrigerant | coolant in / out member and an expansion valve attachment member. It is a vertical sectional view showing the composition of the principal part of the 3rd modification of a refrigerant in / out member and an expansion valve attachment member. FIG. 6 is a view corresponding to FIG. 5 and showing a third modification of the refrigerant inlet / outlet member and the expansion valve mounting member. It is a figure equivalent to FIG. 3 which shows the 4th modification of an expansion valve attachment member.

  Embodiments of the present invention will be described below with reference to the drawings. Throughout the drawings, the same parts and the same parts are denoted by the same reference numerals, and redundant description is omitted.

  In the embodiment described below, the heat exchanger according to the present invention is applied to an evaporator of a car air conditioner using a chlorofluorocarbon refrigerant, and the connection device for the heat exchanger is an expansion valve mounting member.

  In the following description, the term “aluminum” includes aluminum alloys in addition to pure aluminum. Further, 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 FIG. 2) is referred to as the front, and the opposite side is referred to as the rear. The up and down, left and right (up and down, left and right in FIG. 1) when viewing the front from the rear are referred to as up and down and left and right.

  FIG. 1 shows the overall configuration of the evaporator, and FIGS. 2 to 5 show the configuration of the main part of the evaporator.

  1 and 2, an evaporator (1) used in a car air conditioner using a chlorofluorocarbon refrigerant has 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), and an aluminum refrigerant inlet / outlet member (5) joined to the right end of the first header tank (2) And an aluminum expansion valve mounting member (6) joined to the refrigerant inlet / outlet member (5).

  The first header tank (2) is located on the front side (downstream side in the ventilation direction) and extends in the left-right direction, and on the rear side (upstream side in the ventilation direction) and extends in the left-right direction. And a refrigerant outlet header portion (8) integrated with the refrigerant inlet header portion (7). 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).

  The second header tank (3) is located on the front side and extends in the left-right direction, and is integrated with the first intermediate header portion (12) located on the rear side and extending in the left-right direction. And a second intermediate header portion (13). The first intermediate header portion (12) and the second intermediate header portion (13) are formed by dividing the inside of the second header tank (3) into two front and rear spaces by a partition member (14). The inside of the first intermediate header portion (12) and the inside of the second intermediate header portion (13) are communicated with the partition member (14) through a plurality of communication holes (15) formed at intervals in the left-right direction. It has been.

  The heat exchange core section (4) is composed of a plurality of heat exchange pipe groups (17) composed of a plurality of heat exchange pipes (16) arranged in parallel at intervals in the left-right direction. Are arranged in two rows, the ventilation gap between adjacent heat exchange tubes (16) of each heat exchange tube group (17), and the heat exchange tubes (16) at the left and right ends of each heat exchange tube group (17). Corrugated fins (18) are arranged on the outside and brazed to the heat exchange pipe (16), and aluminum side plates (19) are arranged on the outside of the corrugated fins (18) on both the left and right ends, respectively. It is configured by brazing to 18). The upper and lower ends of the heat exchange pipe (16) of the front side heat exchange pipe group (17) are connected to the refrigerant inlet header part (7) and the first intermediate header part (12), and the heat of the rear side heat exchange pipe group (17). The upper and lower ends of the exchange pipe (16) are connected to the refrigerant outlet header part (8) and the second intermediate header part (13). Then, the refrigerant inlet header portion (7) and the refrigerant outlet header portion (7) are formed by the heat exchange pipe (16) of the front and rear heat exchange tube group (17) and the first and second intermediate header portions (12) and (13). 8) A refrigerant circulation path is formed through. The heat exchange tube (16) has a flat shape having a plurality of refrigerant passages arranged in the width direction and arranged in the width direction in the front-rear direction. The corrugated fin (18) is formed in a wave shape using an aluminum brazing sheet having a brazing filler metal layer on both sides, and is shared by both the front and rear heat exchange tubes (16) constituting the front and rear heat exchange tube group (17). Has been.

  As shown in FIGS. 2 to 5, the refrigerant inlet / outlet member (5) has a vertical aluminum first plate (21) located on the left side (first header tank (2) side) and a vertical shape located on the right side. The aluminum second plate (22) and the vertical aluminum intermediate plate (23) positioned between the first plate (21) and the second plate (22) are laminated and brazed. It is 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), and an inflow path (24), One end leads to the refrigerant outlet (11) of the refrigerant outlet header (8) and the other end is the rear edge of the refrigerant inlet / outlet member (5) (the side edge where the inflow passage (24) in the refrigerant inlet / outlet member (5) is opened) ) And an outflow passage (25) opened. The opening to the rear edge of the refrigerant inlet / outlet member (5) in the inflow passage (24) is called an inlet (24a), and the opening to the rear edge of the refrigerant inlet / outlet member (5) in the outlet passage (25) is an outlet (25a ).

  A first communication port (26) communicating with the refrigerant inlet (9) of the refrigerant inlet header (7) and the refrigerant outlet (11) of the refrigerant outlet header (8) are connected to the first plate (21) of the refrigerant inlet / outlet member (5). ) Leading to the second communication port (27), one end is located away from the first and second communication ports (26) and (27), and the other end is opened to the rear edge of the first plate (21) A first semi-circular inflow channel first outward bulging portion (28), one end of which is located away from the first and second communication ports (26), (27) and the other end of the first plate (21) The first outer bulging portion (29) for the outflow passage having a semicircular cross section that opens above the other end opening of the first outer bulging portion (28) for the inflow passage at the rear edge, and the lower end portion Vertically located at a position slightly above the second communication port (27) and having an upper end at a height slightly below the other end opening of the first outward bulging portion (28) for the inflow passage A second outward bulging portion (31) for the outflow passage is formed.

  The second plate (22) of the refrigerant inlet / outlet member (5) has one end at a position away from the first and second communication ports (26), (27) of the first plate (21) and the other end at the first plate. The second outside for the inflow passage having a semicircular cross section opened at the rear edge of the second plate (22) at the same height as the other end of the first outward bulge portion (28) for the inflow passage of (21) The side bulge portion (32) has one end at a position corresponding to the first communication port (26) of the first plate (21) and the other end connected to the second communication port (27) of the first plate (21) and the inflow. The third outward bulge portion (33) for the inflow passage having a semicircular cross section at a position away from the second outward bulge portion (32) for the road, and the second communication of the first plate (21) at one end Located at the position corresponding to the opening (27) and the other end opened at the rear edge of the second plate (22) at the same position as the first outward bulging portion (29) for the outflow passage of the first plate (21) A third semi-circular outflow section (34) for the outflow channel is formed To have.

  One end of the refrigerant inlet / outlet member (5) is connected to the rear edge of the intermediate plate (23) at the same position as the first outward bulging portion (28) for the inflow passage of the first plate (21). Open and let it pass through the inside of the first outward bulge portion (28) for the inflow passage of the first plate (21) and the inside of the second outward bulge portion (32) for the inflow passage of the second plate (22). The first notch (35), the inside of the first outward bulge portion (28) for the inflow passage of the first plate (21) and the third outward bulge portion (33 for the inflow passage of the second plate (22)) ) In the first through hole (36) to be passed through, the first communication port (26) of the first plate (21) and the third outward bulging portion (33) for the inflow passage of the second plate (22) The second through hole (37) through which one end is opened at the rear edge of the intermediate plate (23) at the same position as the first outward bulging portion (29) for the outflow passage of the first plate (21) And the third outward bulge for the outflow passage of the first plate (21) and the outflow passage for the outflow passage of the second plate (22). A second notch (38) that passes through the inside of the portion (34), a second communication port (27) of the first plate (21), and a third outward bulge portion for the outflow passage of the second plate (22) ( 34) a third through hole (39) that passes through the inside, and a third outside outlet (31) for the outflow passage of the first plate (21) and a third for the outflow passage of the second plate (22). A fourth through hole (41) is formed through the inside of the outward bulge portion (34).

  The first plate (21) and the second plate (22) are formed using an aluminum brazing sheet having a brazing material layer on both sides. The intermediate plate (23) is formed using an aluminum brazing sheet or an aluminum brazing sheet having a brazing filler metal layer on both sides.

  The first outward bulging portion (28) for the inflow passage of the first plate (21) includes a vertical portion (28a) extending upward from a position slightly above the first communication port (26), and a vertical portion (28a). And a horizontal portion (28b) extending rearward and extending to the rear edge of the first plate (21). The first outward bulging portion (29) for the outflow passage of the first plate (21) is located above the horizontal portion (28b) of the first outward bulging portion (28) for the inflow passage. ) A portion extending horizontally forward from a position higher than the first outward bulging portion (28) for the inflow passage at the rear edge is inclined forward and obliquely downward. The front end portion of the outflow passage first outer bulge portion (29) is positioned at the center in the front-rear direction of the horizontal portion (28b) of the first inflow passage bulge portion (28). The upper end of the second outward bulging portion (31) for the outflow passage of the first plate (21) is slightly lower than the horizontal portion (28b) of the first outward bulging portion (28) for the inflow passage. In position.

  The second outward bulging portion (32) for the inflow passage of the second plate (22) is the same as the horizontal portion (28b) of the first outward bulging portion (28) for the inflow passage of the first plate (21). In the height position, it extends horizontally forward from the rear edge of the second plate (22), and its front end portion is located slightly rearward of the third outward bulging portion (34) for the outflow passage. The third outward bulging portion (33) for the inflow passage of the second plate (22) has a vertical shape extending upward from a position corresponding to the first communication port (26) of the first plate (21). The upper end portion of the third outward bulging portion (33) for the inflow passage is above the lower end of the vertical portion (28a) of the first outward bulging portion (28) for the inflow passage of the first plate (21). positioned. The third outward bulging portion (34) for the outflow passage of the second plate (22) extends upward from a position corresponding to the second communication port (27) of the first plate (21), and the second inflow passage second. A vertical portion (34a) extending upward from the outward bulge portion (32), and a horizontal portion (34b) extending rearwardly to the upper end of the vertical portion (34a) and reaching the rear edge of the first plate (21). ). The front edge of the upper part of the vertical part (34a) extends forward to increase the flow path area. The upper edge of the portion near the front end of the horizontal portion (34b) is inclined forward to match the upper edge of the portion of the first plate (21) near the front end of the first outward bulge portion (29) for the outflow passage. Inclined downward.

  The shape of the first cutout (35) of the intermediate plate (23) matches the shape of the second outward bulging portion (32) for the inflow passage as viewed from the right side. The first through hole (36) of the intermediate plate (23) has a lower end portion of the vertical portion (28a) of the first outward bulging portion (28) for the inflow passage of the first plate (21) and the second plate (22 ) Is in a position where the upper ends of the third outward bulging portion (33) for the inflow passage overlap each other when viewed from the right side. The second through hole (37) of the intermediate plate (23) is located at a position corresponding to the first communication port (26) of the first plate (21). And the part between the 1st through-hole (36) and the 2nd through-hole (37) in the intermediate | middle plate (23) is excised, and both through-holes (36) ( 37) have been vented. The shape of the first through hole (36), the second through hole (37), and the cutout part (42) is the same as that of the third outward bulge part (33) for the inflow passage of the second plate (22). It is consistent with the shape viewed from. The shape of the second notch (38) of the intermediate plate (23) matches the shape of the outflow channel first outward bulge portion (29) viewed from the right side. The third through hole (39) of the intermediate plate (23) is located at a position corresponding to the second communication port (27) of the first plate (21). The fourth through hole (41) of the intermediate plate (23) is the second outer bulge portion (31) for the outflow passage of the first plate (21) and the third outer side for the outflow passage of the second plate (22). The vertical part (34a) of the bulging part (34) is located at the overlapping position when viewed from the right side. And the part between the 3rd through-hole (39) and the 4th through-hole (41) in the intermediate | middle plate (23) is excised, and both through-holes (39) ( 41) are let through.

  Accordingly, the first communication port (26) of the first plate (21) and the first outward bulging portion (28) for the inflow passage and the second outward bulging portion for the inflow passage of the second plate (22) ( 32) and the third outward bulge portion (33) for the inflow passage, the first notch (35), the first through hole (36), the second through hole (37) and the cut portion of the intermediate plate (23). (42) forms an inflow path (24) in the refrigerant inlet / outlet member (5), the second communication port (27) of the first plate (21), the first outer bulging portion (29) for the outflow path, and The second outward bulge portion (31) for the outflow passage, the third outward bulge portion (34) for the outflow passage of the second plate (22), and the second notch (38) of the intermediate plate (23) The third through hole (39), the fourth through hole (41), and the cut portion (43) form an outflow path (25) in the refrigerant inlet / outlet member (5), and the inflow path (24) and the outflow path (25) intersects the entire plate (21), (22), and (23) in the stacking direction, that is, from the left or right side without being communicated with the interior thereof.

  The top (left side portion) of the first outward bulging portion (28) for the inflow passage of the first plate (21) of the refrigerant inlet / outlet member (5) and the second inflow passage for the second plate (22). The inner surface of the inlet (24a) side end of the inflow channel (24) at the top (right side) in the bulging direction of the outward bulge (32) protrudes inward of the inflow channel (24) and crosses each other. An engagement convex portion (44) extending in the tangential direction (vertical direction) of the outward bulge portions (28) and (32) on the surface is formed. Also, the top portion (left side portion) of the first outer bulging portion (29) for the outflow passage of the first plate (21) of the refrigerant inlet / outlet member (5) and the outflow passage of the second plate (22) On the inner surface of the outlet (25a) side end of the outflow passage (25) at the top (right side portion) of the third outward bulge portion (34) in the bulging direction, respectively, protrudes inward of the outflow passage (25), In addition, an engagement convex portion (45) extending in the tangential direction (vertical direction) of the outward bulge portions (29) and (34) in the cross section is formed. These engaging protrusions (44) and (45) are provided with slits extending in the vertical direction slightly in front of the peripheral wall of the outward bulging portions (28), (32), (29) and (34). At the same time, it is formed by deforming the rear portion of the slit.

  The expansion valve mounting member (6) is formed with a high-pressure refrigerant passage (6a) and a low-pressure refrigerant passage (6b) that extend in the front-rear direction and open at both front and rear sides, and are lined up and down so that the former is positioned below. Yes. Around the front end opening (opening on the refrigerant inlet / outlet member (5) side) of each refrigerant passage (6a) (6b) of the expansion valve mounting member (6), the inflow path (24) and the outflow path of the refrigerant inlet / outlet member (5) (25) Cylindrical fitting convex portions (46) and (47) fitting into the inner portion are integrally formed. Refrigerant is provided respectively on the left and right side portions of the outer peripheral surface of each fitting convex portion (46) (47), that is, on both side portions in the stacking direction of the three plates (21), (22) and (23) of the refrigerant inlet / outlet member (5). Engaging recesses (48) and (49) extending in the vertical direction in which the engaging projections (44) and (45) of the input / output member (5) are fitted are formed. The engaging recesses (48) and (49) have a groove shape, and both upper and lower ends thereof are opened both above and below the fitting protrusions (46) and (47). Then, in a state where the engaging convex portions (44) (45) and the engaging concave portions (48) (49) are fitted to each other, the fitting convex portions (46) (47) are connected to the refrigerant inlet / outlet member (5). It is attached.

  The above-described evaporator (1) is manufactured by combining all parts and brazing them together. When the evaporator (1) is manufactured, when the three plates (21), (22) and (23) of the refrigerant inlet / outlet member (5) are stacked, the first outward expansion for the inflow passage of the first plate (21) The outlet portion (28) and the first outward bulge portion (29) for the outflow passage, the second outward bulge portion (32) for the inflow passage of the second plate (22), and the third outward bulge for the outflow passage The projecting portion (34) sandwiches both fitting convex portions (46) (47) of the expansion valve mounting member (6), and the engaging convex portions (44) (45) and the engaging concave portion (48) ( 49) are fitted to each other. In this state, when the three plates (21), (22), and (23) are temporarily fixed by appropriate means, the expansion valve mounting member (6) has three plates (5) constituting the refrigerant inlet / outlet member (5). 21) Temporarily fixed to (22) and (23). Therefore, the expansion valve mounting member (6) is prevented from falling off from the three plates (21), (22) and (23).

The evaporator (1) constitutes a refrigeration cycle using a chlorofluorocarbon refrigerant together with a compressor and a condenser as a refrigerant cooler, and is mounted on a vehicle, for example, an automobile, as a car air conditioner. At this time, the expansion valve (not shown) is attached to the expansion valve mounting member (6) so that the low-pressure refrigerant discharge path is located above and the high-pressure refrigerant supply path is located below. During the cooling operation, the gas-liquid mixed phase two-phase refrigerant that has passed through the high-pressure refrigerant supply passages of the compressor, the condenser, and the expansion valve passes through the high-pressure refrigerant passage (6a) of the expansion valve mounting member (6). ) Enters the inflow path (24) from the rear edge inlet (24a), flows through the inflow path (24), and enters the refrigerant inlet (9) of the first header tank (2) from the first communication port (26). ) Through the refrigerant inlet header (7). The refrigerant that has entered the refrigerant inlet header (7) is divided into the heat exchange pipe (16) of the front heat exchange pipe group (17), the first intermediate header part (12) of the second header tank (3), the partition member ( 14) the communication hole (15), the second intermediate header section (13), the heat exchange pipe (16) of the rear heat exchange pipe group (17) and the refrigerant outlet header section (8) in sequence, The refrigerant enters the outflow path (25) of the refrigerant inlet / outlet member (5) from the second communication port (27) through the refrigerant outlet (11) of (8). The refrigerant that has entered the outflow passage (25) flows through the outflow passage (25), out of the outlet (25a) at the rear edge of the refrigerant inlet / outlet member (5), and flows through the low pressure refrigerant passage of the expansion valve mounting member (6). The refrigerant enters the low-pressure refrigerant discharge path of the expansion valve through (6b), and is sent to the compressor through the low-pressure refrigerant discharge path.
While the refrigerant flows through the heat exchange pipe (16), heat exchange is performed with air (see arrow X in FIG. 1) passing through the ventilation gap between the adjacent heat exchange pipes (16). And then leak.

  6 and 7 show a first modification of the refrigerant inlet / outlet member and the expansion valve mounting member.

  6 and 7, the top portion (left side portion) and the second plate (22) of the first outward bulging portion (28) for the inflow passage of the first plate (21) of the refrigerant inlet / outlet member (5). On the inner surface of the inlet (24a) side end of the inflow passage (24) at the top (right side portion) of the second outward bulge portion (32) for the inflow passage of Is formed. Further, the left side portion of the first outflow passage portion (29) for the outflow passage of the first plate (21) of the refrigerant inlet / outlet member (5) and the third outboard portion for the outflow passage of the second plate (22). Engagement recesses (51) are formed on the inner surface of the outlet (25a) side end portion of the outflow path (25) in the right side portion of (34). All the engagement recesses (50) (51) are formed by deforming the outer wall of the outward bulges (28) (32) (29) (34) outward, and all the engagement recesses The positions in the front-rear direction of (50) and (51) are the same.

  Also, the left and right side portions of the outer peripheral surface of each fitting projection (46) (47) of the expansion valve mounting member (6), that is, the three plates (21), (22), (23) of the refrigerant inlet / outlet member (5). Engaging convex portions (52) and (53) that fit into the engaging concave portions (50) and (51) of the refrigerant inlet / outlet member (5) are integrally formed on both side portions in the stacking direction.

  When the evaporator (1) is manufactured, when the three plates (21), (22) and (23) of the refrigerant inlet / outlet member (5) are stacked, the first outward expansion for the inflow passage of the first plate (21) The outlet portion (28) and the first outward bulge portion (29) for the outflow passage, the second outward bulge portion (32) for the inflow passage of the second plate (22), and the third outward bulge for the outflow passage The fitting part (46) (47) of the expansion valve mounting member (6) is sandwiched between the protruding part (34) and the engaging convex part (52) (53) and the engaging concave part (50) ( 51) fits each other. In this state, when the three plates (21), (22), and (23) are temporarily fixed by appropriate means, the expansion valve mounting member (6) includes the three plates (21) ( 22) Temporarily fixed to (23).

  8 and 9 show a second modification of the refrigerant inlet / outlet member and the expansion valve mounting member.

  8 and 9, the upper and lower sides of the first outward bulging portion (28) for the inflow passage of the first plate (21) of the refrigerant inlet / outlet member (5), that is, the three refrigerant inlet / outlet members (5) Inflow passages on both side portions in the direction perpendicular to the stacking direction of the plates (21), (22), and (23), and on both upper and lower side portions of the second outward bulging portion (32) for the inflow passage of the second plate (22) ( 24) The inner surface of the end of the inlet (24a) side protrudes inward of the inflow channel (24) and extends in the tangential direction (left-right direction) of the outward bulges (28) (32) in the cross section. An engaging convex part (60) is formed. In addition, the upper and lower sides of the first outer bulging portion (29) for the outflow passage of the first plate (21) of the refrigerant inlet / outlet member (5) and the third outer bulge for the outflow passage of the second plate (22). On the inner surface of the outlet (25a) side end portion of the outflow passage (25) in the upper and lower side portions of the portion (34), each protrudes inward of the outflow passage (25), and the outward bulge portion in the cross section (29) An engagement convex portion (61) extending in the tangential direction (left-right direction) of (34) is formed. These engaging projections (60) and (61) are provided with slits extending in the vertical direction slightly in front of the rear end of the peripheral wall of the outward bulging portions (28), (32), (29), and (34). At the same time, it is formed by deforming the rear portion of the slit. Further, the notch (35) (38) is provided at the rear end of both the upper and lower edges of the first notch (35) and the second notch (38) in the intermediate plate (23) of the refrigerant inlet / outlet member (5). Engagement projections (62) and (63) projecting inward are integrally formed. The positions of all the engaging projections (60) (61) (62) (63) in the front-rear direction are the same, and all the engaging projections (60) (61) (62) (63) are arranged in the front-rear direction. width are equal to each other.

  Lamination of three plates (21), (22) and (23) of the upper and lower sides of the outer peripheral surface of each fitting projection (46) and (47) of the expansion valve mounting member (6), that is, the refrigerant inlet / outlet member (5) Engaging protrusions (60), (61), (62), and (63) of the three plates (21), (22), and (23) of the refrigerant inlet / outlet member (5) are fitted to both side portions in the direction orthogonal to the direction, respectively. Engaging recesses (64) and (65) extending in the front-rear direction are formed. The engaging recesses (64) and (65) have a groove shape, and both left and right ends thereof are open on both the left and right sides of the fitting protrusions (46) and (47).

  When the evaporator (1) is manufactured, when the three plates (21), (22) and (23) of the refrigerant inlet / outlet member (5) are stacked, the first outward expansion for the inflow passage of the first plate (21) The outlet portion (28) and the first outward bulge portion (29) for the outflow passage, the second outward bulge portion (32) for the inflow passage of the second plate (22), and the third outward bulge for the outflow passage The projecting portion (34) sandwiches both fitting convex portions (46) (47) of the expansion valve mounting member (6) and is engaged with the engaging convex portions (60) (61) (62) (63). The mating recesses (64) and (65) fit into each other. In this state, when the three plates (21), (22), and (23) are temporarily fixed by appropriate means, the expansion valve mounting member (6) includes the three plates (21) ( 22) it is temporarily fixed in (23). Therefore, the expansion valve mounting member (6) is prevented from falling off from the three plates (21), (22) and (23).

  10 and 11 show a third modification of the refrigerant inlet / outlet member and the expansion valve mounting member.

  10 and 11, the upper and lower sides of the first outward bulging portion (28) for the inflow passage of the first plate (21) of the refrigerant inlet / outlet member (5), that is, the three refrigerant inlet / outlet members (5) Inflow passages on both side portions in the direction perpendicular to the stacking direction of the plates (21), (22), and (23), and on both upper and lower side portions of the second outward bulging portion (32) for the inflow passage of the second plate (22) ( Engagement recesses (70) are formed on the inner surface of the inlet (24a) side end of 24). In addition, the upper and lower sides of the first outer bulging portion (29) for the outflow passage of the first plate (21) of the refrigerant inlet / outlet member (5) and the third outer bulging portion for the outflow passage of the second plate (22). Engagement recesses (71) are formed on the inner surface of the outlet (25a) side end portion of the outflow path (25) in both the upper and lower sides of (34). The engagement recesses (70) (71) of the first plate and the second plate are formed by deforming the outer walls of the outward bulges (28) (32) (29) (34) outward. It opens to the intermediate plate (23) side. Further, engagement recesses (72), (73) are respectively formed at the rear end portions of the upper and lower side edges of the first notch (35) and the second notch (38) in the intermediate plate (23) of the refrigerant inlet / outlet member (5). ) Is formed. The positions of all the engagement recesses (70) (71) (72) (73) in the front-rear direction are the same, and the widths of all the engagement recesses (70) (71) (72) (73) in the front-rear direction are Are equal.

  Lamination of three plates (21), (22) and (23) of the upper and lower sides of the outer peripheral surface of each fitting projection (46) and (47) of the expansion valve mounting member (6), that is, the refrigerant inlet / outlet member (5) It fits in the engaging recesses (70) (71) (72) (73) of the three plates (21) (22) (23) of the refrigerant inlet / outlet member (5) on both side portions in the direction orthogonal to the direction. Engaging convex portions (74) and (75) are formed.

  When the evaporator (1) is manufactured, when the three plates (21), (22) and (23) of the refrigerant inlet / outlet member (5) are stacked, the first outward expansion for the inflow passage of the first plate (21) The outlet portion (28) and the first outward bulge portion (29) for the outflow passage, the second outward bulge portion (32) for the inflow passage of the second plate (22), and the third outward bulge for the outflow passage The fitting part (46) (47) of the expansion valve mounting member (6) is sandwiched between the protruding part (34) and the engaging convex parts (74) (75) and the engaging concave part (70) ( 71) (72) (73) are fitted to each other. In this state, when the three plates (21), (22), and (23) are temporarily fixed by appropriate means, the expansion valve mounting member (6) includes the three plates (21) ( 22) it is temporarily fixed in (23). Therefore, the expansion valve mounting member (6) is prevented from falling off from the three plates (21), (22) and (23).

  FIG. 12 shows a fourth modification of the expansion valve mounting member.

  In FIG. 12, the expansion valve mounting member (80) includes an aluminum block-shaped main body (81) and two aluminum cylindrical bodies (82) (83) fixed to the main body (81) in a penetrating manner. . The block-shaped body (81) is formed with two through holes (84) and (85) having a circular cross section at the top and bottom, and two cylindrical bodies (82) and (83) are formed in the through holes (84) and (85). It is passed through and fixed to the block-shaped body (81). The inside of the lower cylindrical body (82) is a high-pressure refrigerant passage (82a), the inside of the upper cylindrical body (83) is a low-pressure refrigerant passage (83a), and both cylindrical bodies (82) (83) A cylindrical fitting in which the portion protruding from the block-shaped main body (81) to the rear (refrigerant inlet / outlet member (5)) side fits in the inflow path (24) and the outflow path (25) of the refrigerant inlet / outlet member (5) Protrusions (86) (87) are formed.

  The refrigerant inlet / outlet member (5) is as shown in FIGS. 6 and 7, and the left and right side portions of the outer peripheral surface of each fitting projection (86) (87) of the expansion valve mounting member (6), that is, the refrigerant inlet / outlet member ( Engaging protrusions (88) fitted in the engaging recesses (50), (51) of the refrigerant inlet / outlet member (5), respectively, on both side portions in the stacking direction of the three plates (21), (22), (23) of 5). ) (89) are integrally formed.

  At the time of manufacturing the evaporator (1), three plates of the expansion valve mounting member (80) are formed in the same manner as in the second modification of the refrigerant inlet / outlet member and the expansion valve mounting member shown in FIGS. (21) (22) (23) is prevented from falling off.

  In the expansion valve mounting member shown in FIG. 12, the engaging convex portion and the engaging concave portion are fitted to each other as in the case of the above-described embodiment and other modifications of the refrigerant inlet / outlet member and the expansion valve mounting member. As described above, the engaging convex portion may be provided with an engaging concave portion or an engaging convex portion.

  In the heat exchanger according to the present invention, a plurality of flat hollow bodies formed by brazing peripheral edges with a pair of plate-shaped plates facing each other are arranged in parallel, and are arranged side by side in the front-rear direction. A refrigerant inlet header section and a refrigerant outlet header section, a refrigerant turn section disposed at a distance from both header sections, a plurality of refrigerant forward refrigerant circulation sections that communicate the refrigerant inlet header section and the refrigerant turn section, The refrigerant outlet header section and a plurality of refrigerant return-side refrigerant circulation sections that communicate with the refrigerant turn section are provided. A refrigerant inlet is formed at one end of the refrigerant inlet header section, and the same end as the refrigerant inlet in the refrigerant outlet header section A refrigerant outlet is formed in the refrigerant inlet header portion from the refrigerant inlet to the refrigerant turn portion through the refrigerant outlet side refrigerant circulation portion, where the flow direction is changed and the refrigerant return side refrigerant circulation portion is passed. 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 heat exchanger according to the present invention is suitably used for an evaporator of a refrigeration cycle constituting a car air conditioner.

(1): Evaporator (heat exchanger)
(5): Refrigerant input / output member
(6) (80): Expansion valve mounting member (connector for heat exchanger)
(6a) (6b):
(7): Refrigerant inlet header
(8): Refrigerant outlet header
(9): Refrigerant inlet
(11): Refrigerant outlet
(21): First plate
(22): Second plate
(23): Intermediate plate
(24): Inflow channel
(24a): Entrance
(25): Outflow channel
(25a): Exit
(28) (32) (33): Outward bulge for inflow passage
(29) (31) (34): Outward bulge for outlet
(36) (37) (39) (41): Through hole
(35) (38): Notch
(44) (45) (52) (53) (60) (61) (62) (63) (74) (75) (88) (89): Engaging convex
(48) (49) (50) (51) (64) (65) (70) (71) (72) (73): Engaging recess
(46) (47) (86) (87): Mating convex
(82) (83): Tubular body
(82a) (83a): Refrigerant passage

Claims (9)

A refrigerant inlet header section and a refrigerant outlet header section arranged side by side in the ventilation direction, and a refrigerant circulation path through both the header sections, a refrigerant inlet is formed at one end of the refrigerant inlet header section, and a refrigerant outlet A refrigerant outlet is formed at the same end as the refrigerant inlet in the header portion, 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 heat exchanger
A refrigerant inlet / outlet member having the first and second plates stacked and joined across the refrigerant inlet header portion and the refrigerant outlet header portion, a refrigerant passage having both ends opened, and the refrigerant inlet / outlet member A connecting device for a heat exchanger that is joined, and between the plates of the refrigerant inlet / outlet member, one end communicates with the refrigerant inlet of the refrigerant inlet header and the other end opens at one side edge of the refrigerant inlet / outlet member. At least one of the inflow path and the outflow path that opens at the side edge where the inflow path of the refrigerant inlet / outlet member is opened and the other end communicates with the refrigerant outlet of the refrigerant outlet header A fitting convex portion is provided around one end opening of each refrigerant passage of the connection device for a heat exchanger, and fitted into the other end opening of the inlet / outlet passage of the refrigerant inlet / outlet member. An engaging convex portion and an engaging concave portion that are fitted to each other are formed between the surfaces of the two plates of the member facing the inflow passage and the outflow passage and the outer peripheral surface of the fitting convex portion of the connection device for a heat exchanger. Heat exchanger. Refrigerant on the outer peripheral surface of the fitting convex portion of the connection device for heat exchanger, wherein the first plate and the second plate of the refrigerant inlet / outlet member are respectively formed with an outward bulge portion for the inflow passage and an outward bulge portion for the outflow passage. Between both side portions in the stacking direction of both plates of the inlet / outlet member and the inner surface of the top portion in the bulging direction of the outer bulging portion for the inflow passage and the outer bulging portion for the outflow passage of both plates of the refrigerant inlet / outlet member, The heat exchanger according to claim 1, wherein an engaging convex portion and an engaging concave portion that are fitted to each other are formed. An intermediate plate is interposed between the first plate and the second plate of the refrigerant inlet / outlet member, and the intermediate plate is joined to the first plate and the second plate. The intermediate plate has an inflow path and an outflow path. Cut through the outer bulges for the inflow passages of the first and second plates and the outer bulges for the outflow passages of the first and second plates so that they intersect when viewed from the stacking direction of all the plates. The heat exchanger according to claim 2, wherein notches and through holes are formed. Refrigerant on the outer peripheral surface of the fitting convex portion of the connection device for heat exchanger, wherein the first plate and the second plate of the refrigerant inlet / outlet member are respectively formed with an outward bulge portion for the inflow passage and an outward bulge portion for the outflow passage. Groove-shaped engaging recesses that extend in the laminating direction and open at both ends are formed on both side portions in a direction orthogonal to the laminating direction of both plates of the inlet / outlet member. The heat exchanger according to claim 1, wherein the engaging convex portion is formed so as to straddle the inner surface of the outlet portion and the inner surface of the outward bulge portion for the outflow passage. An intermediate plate is interposed between the first plate and the second plate of the refrigerant inlet / outlet member, and the intermediate plate is joined to the first plate and the second plate. The intermediate plate has an inflow path and an outflow path. Cut through the outer bulges for the inflow passages of the first and second plates and the outer bulges for the outflow passages of the first and second plates so that they intersect when viewed from the stacking direction of all the plates. Engagement of the fitting protrusions of the connection device for heat exchangers on both side edges of the notches that form notches and through-holes and form the ends of the inflow and outflow passages on the intermediate plate on the heat exchanger connection device side The heat exchanger according to claim 4, wherein an engagement convex portion that fits into the concave portion is formed. Refrigerant on the outer peripheral surface of the fitting convex portion of the connection device for heat exchanger, wherein the first plate and the second plate of the refrigerant inlet / outlet member are respectively formed with an outward bulge portion for the inflow passage and an outward bulge portion for the outflow passage. Engagement protrusions are formed on both side portions of the inlet / outlet member in the direction orthogonal to the stacking direction of both plates, and the inner surface of the inflow passage outward bulge portion and the outflow passage outward bulge portion of both plates of the refrigerant input / output member The heat exchanger according to claim 1, wherein an engagement recess is formed so as to straddle the inner surface of the heat exchanger. An intermediate plate is interposed between the first plate and the second plate of the refrigerant inlet / outlet member, and the intermediate plate is joined to the first plate and the second plate. The intermediate plate has an inflow path and an outflow path. Cut through the outer bulges for the inflow passages of the first and second plates and the outer bulges for the outflow passages of the first and second plates so that they intersect when viewed from the stacking direction of all the plates. Engagement of the fitting protrusions of the connection device for heat exchangers on both side edges of the notches that form notches and through-holes and form the ends of the inflow and outflow passages on the intermediate plate on the heat exchanger connection device side The heat exchanger according to claim 6, wherein an engagement concave portion into which the convex portion is fitted is formed. The fitting convex part is integrally formed in the connection apparatus for heat exchangers, and it has opened to the front end surface of the one end fitting convex part of the refrigerant path of the connection apparatus for heat exchangers. The heat exchanger according to crab. The connection device for a heat exchanger includes a block-shaped main body and two cylindrical bodies fixed in a penetrating manner to the block-shaped main body, and the cylindrical body serves as a refrigerant passage, and the block-shaped main body in the cylindrical body The heat exchanger according to any one of claims 1 to 7, wherein a protruding portion is a fitting convex portion.

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