JP4012989B2 - Evaporator and car air conditioner equipped with the same - Google Patents

Description

  The present invention relates to an evaporator and a car air conditioner including the evaporator.

  In this specification, the front and rear are based on the air flow direction, the front means the air inlet side, and the rear means the air outlet side. The left and right are the left and right when viewed from the front.

  In the case of a car air conditioner, the air cooled by the evaporator is blown into the vehicle from a plurality of outlets, but the air that has passed through the left half of the evaporator is usually from the left side (for example, the driver's side) outlet. The air that has passed through the right half of the evaporator is blown into the vehicle from the right side (for example, the passenger's side) air outlet, so if there is a temperature difference between the former air and the latter, May give pleasure. In recent years, the distance between the evaporator and the outlet tends to be shortened, and the above problem becomes more obvious. Moreover, the problem of the air temperature difference as described above becomes more prominent as the size of the evaporator in the left-right direction increases.

Therefore, various devices have been devised in the past so as to make the temperature of the air that has passed through the left and right halves of the evaporator uniform, especially the refrigerant distribution pattern in the evaporator. FIG. 13 shows an example thereof, and the evaporator (500) shown in FIG. 13 has a front heat exchange section (500A) and a rear heat exchange section (500B) adjacent to each other. Each heat exchanging part (500A) (500B) has a pair of upper and lower horizontal headers (502) extending in the left-right direction, spaced in the left-right direction, with the upper end at the upper header (502) and the lower end at the lower header A plurality of vertical refrigerant circulation portions (503) respectively connected to (502). A refrigerant inlet (504) is provided at the left end of the upper header (502) of the rear heat exchanger (500B), and a refrigerant outlet (505) is provided at the left end of the upper header (502) of the front heat exchanger (500A). The right end portions of the upper headers (502) of the heat exchange parts (500A) (500B) are communicated with each other by a communication pipe part (506). Then, the refrigerant flow in the refrigerant circulation section (503) in the left half of the rear heat exchange section (500B) is downward, and the refrigerant flow in the refrigerant circulation section (503) in the right half is upward. The upper header (502) of the rear heat exchanging part (500B) is divided into two parts on the left and right by a vertical partition (502A). Further, the refrigerant flow in the refrigerant circulation section (503) in the right half of the front heat exchange section (500A) is downward, and the refrigerant flow in the refrigerant circulation section (503) in the left half is upward. The upper header (502) in the front heat exchanging section (500A) is divided into two on the left and right by the vertical partition (502A).
Japanese Patent Laid-Open No. 10-170098

  The objective of this invention is reducing the pressure loss of the refrigerant | coolant in the turn part from a back heat exchange part to a front heat exchange part in the evaporator used for a car air conditioner.

  The evaporator according to the present invention has a front heat exchange part on the air inlet side and a rear heat exchange part on the air outlet side adjacent to each other, and each heat exchange part has a pair of upper and lower headers extending in the left-right direction, and a left-right direction. And a large number of refrigerant flow sections, the upper end of which is connected to the upper header and the lower end of which is connected to the lower header. A refrigerant outlet is provided at one end of either the upper or lower header of the heat exchange part, and the other end side part of the upper or lower header of the rear heat exchange part and the other end part of the upper or lower header of the front heat exchange part An evaporator communicated by communication means, wherein at least one of the upper and lower headers of the rear heat exchanging section has a refrigerant flow direction in the refrigerant circulation section of the rear heat exchanging section. In the header so that it is turned upside down A vertical partition that divides in the right direction is provided, and the refrigerant flowing into the upward refrigerant circulation section group of the rear heat exchange section that is farthest from the refrigerant inlet is the rear heat that constitutes the refrigerant circulation section group The plurality of refrigerant circulation portions in the lower header of the front and rear heat exchange portions are divided into the plurality of refrigerant circulation portions of the front heat exchange portion adjacent to the plurality of refrigerant circulation portions of the exchange portion and flow upward inside them. Corresponding portions are communicated with each other by the branching communication means.

  Further, another evaporator according to the present invention has a front heat exchange section on the air inlet side and a rear heat exchange section on the air outlet side adjacent to each other, and each heat exchange section is a pair of upper and lower headers extending in the left-right direction. And a plurality of refrigerant flow sections arranged at intervals in the left-right direction and having an upper end connected to the upper header and a lower end connected to the lower header, respectively, and a refrigerant at one end of either the upper or lower header of the rear heat exchange section The inlet is provided with a refrigerant outlet at one end of either the upper or lower header of the front heat exchanging section, and the other end of the upper or lower header of the rear heat exchanging section and the other end of the upper or lower header of the front heat exchanging section. The evaporator is communicated with the side portion by communication means, and at least one of the upper and lower headers of the rear heat exchanging section has a plurality of refrigerant flow directions in the refrigerant circulation section of the rear heat exchanging section. The refrigerant circulation part of each A vertical partition that divides the inside of the header in the left-right direction is provided, and the refrigerant flowing into the downward refrigerant circulation section group of the rear heat exchange section that is farthest from the refrigerant inlet constitutes the refrigerant circulation section group. The plurality of refrigerants in the upper header of the front and rear heat exchange units so as to divert to the plurality of refrigerant circulation units of the front heat exchange unit adjacent to the plurality of refrigerant circulation units of the rear heat exchange unit The parts corresponding to the refrigerant circulation part are communicated by the diversion communication means.

  In this way, after the refrigerant flowing into the upward or downward refrigerant circulation portion group located farthest from the refrigerant inlet in the rear heat exchange portion constitutes the refrigerant circulation portion group via the diversion communication means. By diverting to the plurality of refrigerant circulation portions of the front heat exchange portion adjacent to the plurality of refrigerant circulation portions of the heat exchange portion, the pressure loss of the refrigerant can be reduced.

  In the above, a plurality of refrigerant circulation parts of the rear heat exchange part constituting the upward or downward refrigerant circulation part group farthest from the refrigerant inlet, and a plurality of refrigerant circulation parts of the front heat exchange part adjacent thereto In addition to being independent of each other, they can be integrated so as to communicate with each other. According to the latter, the refrigerant can be caused to flow using the substantially entire width of the evaporator in the turn portion from the rear heat exchanging section to the front heat exchanging section, so that the pressure loss of the refrigerant can be further reduced.

  In the evaporator according to the present invention, the upper and lower headers and the refrigerant circulation part of the front and rear heat exchange part are provided with a pair of upper and lower header forming concave parts on one side and a refrigerant circulation part forming concave part having upper and lower ends connected to the upper and lower header forming concave parts. By joining a pair of plates provided in pairs so that these recesses face each other, and by stacking a large number of the plate pairs, the bottom walls of these header forming recesses are joined together The bottom wall of the header forming recess that is formed and disposed at the position where the refrigerant should pass is formed with a refrigerant passage hole, and the vertical partition is used to form the upper and lower headers on the rear side without the refrigerant passage hole. It may be formed by the bottom wall of the recess.

  Further, in the evaporator according to the present invention, the upper and lower headers of the front and rear heat exchange section are formed by the front and rear tank chambers of a pair of upper and lower tanks, the interior of which is divided into two tank chambers, and the refrigerant circulation section of the front and rear heat exchange section However, the upper and lower ends are formed by a number of front and rear tank chambers connected to the front and rear tank chambers, and a plurality of vertical pipes for forming refrigerant circulation portions, and the vertical partition partitions the rear tank chamber of the upper and lower tanks in the left and right direction In some cases, the vertical wall is formed as described above.

  The present invention also includes a car air conditioner equipped with the above-described evaporator according to the present invention.

  1 to 6 show a first reference example. As shown in FIGS. 1 and 2, the car air conditioner evaporator (1) has a front heat exchange section (1A) on the air inlet side and a rear heat exchange section (1B) on the air outlet side that are adjacent to each other. . Each of the front and rear heat exchangers (1A) and (1B) has a pair of upper and lower headers (2) extending in the left-right direction, arranged at intervals in the left-right direction, with the upper end at the upper header (2) and the lower end at the lower header 17 vertical refrigerant circulation portions (3) connected to (2). A refrigerant inlet (4) is provided at the left end of the upper header (2) of the rear heat exchanger (1B), and a refrigerant outlet (5) is provided at the left end of the upper header (2) of the front heat exchanger (1A). . The right end portions of the upper header (2) of the front and rear heat exchange sections (1A) and (1B) are communicated with each other by a communication pipe section (6) (communication means).

  In the upper and lower headers (2) of the rear heat exchanging section (1B), the direction of the refrigerant flow in the refrigerant circulation section of the rear heat exchanging section (1B) is turned upside down for every four refrigerant circulation sections, A vertical partition (21) is provided to partition the header (2) in the left-right direction so as to form an upward refrigerant circulation section group (3U) one by one in the left half and right half of the exchange section (1B). It has been. Thereby, in the rear heat exchanging section (1B), the upward refrigerant circulation section group (3U) is formed in the second group and the fourth group, counting from the side closer to the refrigerant inlet (4), and the downward refrigerant circulation section is formed. The group (3D) is formed in the first group and the third group, counting from the side closer to the refrigerant inlet (4). The upward refrigerant circulation part group (3U) is constituted by four or five refrigerant circulation parts (3), and the downward refrigerant circulation part group (3D) is constituted by four refrigerant circulation parts (3).

  Further, in the upper header (2) of the front heat exchange section (1A), the refrigerant flow in the eight refrigerant circulation sections (3) on the right side of the front heat exchange section (1A) faces downward, and the remaining nine pieces. A vertical partition (21) that divides the header (2) into two left and right sides is provided so that the flow of the refrigerant in the refrigerant circulation part (3) is upward.

  As shown in FIG. 1, the space between the refrigerant circulation sections (3) adjacent to the left and right in the front and rear heat exchange sections (1A) (1B) is an air circulation section (7). Outer fins (8) are arranged in the air circulation part (7).

  As shown in FIGS. 1 and 3 to 6, the upper and lower headers (2) and the refrigerant circulation portion (3) of the front and rear heat exchange sections (1 A) and (1 B) are arranged with a pair of upper and lower header forming recesses (102). A pair of plates (100) in which a pair of coolant circulation portion forming recesses (103) whose upper and lower ends are connected to the header forming recess (102) are provided on the front and rear sides of the recesses (102) and (103). They are joined together so that they face each other, and a plurality of pairs of the plates (100) are overlapped to join the bottom walls (102A) of these header forming recesses (102). A refrigerant passage hole (104) is formed in the bottom wall (102A) of the header forming recess (102) arranged at a position where the refrigerant should pass. The vertical partition (21) of the upper and lower headers (2) of the rear heat exchange section (1B) is formed by the bottom wall (102A) of the rear upper and lower header forming recesses (102) in which no coolant passage holes are formed. Yes. The vertical partition (21) of the upper header (2) of the front heat exchanging portion (1A) is formed by the bottom wall (102A) of the front header forming recess (102) where no coolant passage hole is formed. . The plate (100) is usually formed from an aluminum or aluminum alloy plate clad with a brazing material on both sides, and the paired plates (100) are usually joined by brazing. Outer fins (8) are interposed between the intermediate lengths of adjacent pairs of plates (100) and joined to the outer surfaces of both plates (100). An end plate (110) is joined to the outside of the plate (100) located at the left and right ends via outer fins (8). The end plate (110) is also usually formed of an aluminum or aluminum alloy plate clad with a brazing material on one or both sides, and joined to the outer surfaces of the plates (100) at both the left and right ends by brazing.

  FIG. 3 shows a normal plate (100) pair. These plates (100) have a coolant passage hole (104) on the bottom wall (102A) of the upper and lower header forming recesses (102) of the respective sets of front and rear. Corrugated inner fins (9) are interposed in two front and rear refrigerant flow sections (3) formed by a pair of front and rear refrigerant flow section forming recesses (103) on both plates (100). Yes. The inner fins (9) are usually formed from corrugated plates made of aluminum or aluminum alloy, and are joined to the inner surfaces of both plates (100) by brazing.

  FIG. 4 shows a pair of plates (100) arranged at a position corresponding to the vertical partition (21) of the header (2). In FIG. 4, a fluid passage hole (104) is formed in the bottom wall (102A) of the rear upper header forming recess (102) among the four header forming recesses (102) of one plate (100). However, the vertical wall (21) of the upper header (2) of the rear heat exchange section (1B) is formed by the bottom wall (102A). The other vertical partition (21) is also formed in the same manner as described above.

  FIG. 5 shows a pair of plates (100) arranged at a position corresponding to the communication pipe section (6). In FIG. 5, a communication pipe portion forming recess (106) extending in the front-rear direction is formed on the inner surface of one plate (100) so that the two front header forming recesses (102) communicate with each other. . The communication pipe part (6) is formed by the communication pipe part forming recess (106) of the one plate (100) and the inner surface part of the other plate (100) opposite to the concave part (106). The other plate (100) may be formed with a communication tube portion forming recess similar to that described above, and the communication tube portion forming recess of both plates (100) may be formed.

  In this reference example, the communication pipe section (6) corresponds to the five refrigerant circulation sections (3) constituting the upward refrigerant circulation section group (3U) on the right side of the rear heat exchange section (1B). Although a total of five are provided, the number may be reduced as long as the pressure loss of the refrigerant does not become a problem. In this reference example, the upper headers (2) of the front and rear heat exchanging parts (1A) (1B) are communicated with each other by the communicating pipe part (6) using the concave part (106) of the pair of plates (100). However, instead of this, for example, a communication pipe portion for communicating the right ends of the upper header (2) may be provided in the end plate. An end plate having such a communication pipe part is formed by, for example, joining a pair of plates having communication pipe part forming recesses extending in the front-rear direction at the upper end of one side so that these recesses face each other. Can be formed. Further, in this reference example, the right end portions of the upper header (2) of the front and rear heat exchange sections (1A) (1B) are communicated with each other by the communication pipe section (6), but depending on the refrigerant flow pattern, The upper header (2) of the rear heat exchanger (1B) and the right end of the lower header (2) of the front heat exchanger (1A), or the lower header (2) of the rear heat exchanger (1B) and the front heat exchanger In some cases, it may be necessary to connect the right ends of the upper header (2) of (1A) with communication means. In such a case, a communication pipe portion extending in an oblique direction may be provided in the end plate so that the right ends of the headers communicate with each other. The end plate can be formed, for example, by joining a pair of plates each having a recess for forming a communicating pipe portion extending obliquely on one side so that these recesses face each other.

  FIG. 6 shows the left end plate (100), the left end plate (110), the outer fin (8), and the refrigerant flow pipe connecting member mounting plate (10). In FIG. 6, a plate (100) is the same as the plate (100) shown in FIG. 3, and a refrigerant passage hole (104) opened in the bottom wall (102A) of the concave portion (102) for forming the upper header later. Serves as a refrigerant inlet (4), and a refrigerant passage hole (104) formed in the bottom wall (102A) of the front upper header forming recess (102) serves as a refrigerant outlet (5). On the outer surface of the end plate (110), recesses (112) similar to these recesses (102) are formed so as to correspond to the four header forming recesses (102) of the plate (100). A hole (114) is formed in the bottom wall (112A) of the two front and rear recesses (112) on the upper side of the end plate (110) so as to overlap the refrigerant inlet (4) and the refrigerant outlet (5). On the other hand, the bottom wall (112A) of the two front and rear recesses (112) on the lower side of the end plate (110) is not perforated, and these bottom walls (112A) serve as the front and rear heat exchange parts (1A) ( 1B) constitutes the left end wall of the lower header (2). The outer fin (8) is usually formed of a corrugated plate made of aluminum or aluminum alloy, and joined to the opposing surfaces of the plate (100) and the end plate (110) by brazing. The refrigerant distribution pipe connecting member mounting plate (10) is usually formed of an aluminum or aluminum alloy plate and joined to the upper end of the outer surface of the end plate (110) by brazing. The plate (10) has two front and rear holes (10A) that communicate with a hole (114) formed in the bottom wall (112A) of the two front and rear recesses on the upper side of the end plate (110). A refrigerant distribution pipe connecting member (not shown) is joined by welding or the like. The right end plate (100), the right end plate (110), and the outer fin (8) interposed therebetween are also the plate (100), end plate (110) and outer fin shown in FIG. It is almost the same as (8).

  When the car air conditioner switch is turned on and the clutch mechanism of the compressor is connected to the crankshaft of the engine, the refrigerant flows through the evaporator (1) as follows, as shown in FIG. . That is, the refrigerant introduced into the evaporator (1) from the refrigerant inlet (4) passes through the upper and lower headers (2) of the rear heat exchanging part (1B) and is directed downward on the left side of the rear heat exchanging part (1B). After sequentially flowing through the circulation section group (3D), the left upward refrigerant circulation section group (3U), the right downward refrigerant circulation section group (3D), and the right upward refrigerant circulation section group (3U), the communication pipe section ( 6) to the front heat exchange section (1A), and through the upper and lower headers (2) of the front heat exchange section (1A), the downward refrigerant distribution section group (3D) on the right side of the front heat exchange section (1A) and The refrigerant flows sequentially through the left upward refrigerant circulation section group (3U) and is discharged from the refrigerant outlet (5). In the above, the temperature of the refrigerant flowing in the interior is lower in the refrigerant circulation section group near the refrigerant inlet (4) in the rear heat exchange section (1B), and the refrigerant circulation near the refrigerant outlet (5) in the front heat exchange section (1A). The temperature of the air (A) that has passed through the left and right halves of the evaporator (1) is substantially uniform because the temperature of the section group is higher. Further, in this reference example, the part where the refrigerant is overheated, that is, the so-called superheat part (30) normally constitutes the upward refrigerant circulation part group (3U) on the left side of the front heat exchange part (1A). It occurs in several refrigerant circulation parts (3) located on the right side among the refrigerant circulation parts (3). Then, an upward refrigerant circulation section (3U) group on the left side of the rear heat exchange section (1B) is arranged so as to correspond to the superheat section (30).

  On the other hand, if the compressor mechanism of the compressor is automatically turned off to prevent the air from becoming too cold with the car air conditioner switched on, the air (A) can still pass through the evaporator (1), The supply of the refrigerant to the evaporator (1) is temporarily stopped. Thus, when the flow of the refrigerant in the evaporator stops, in the conventional evaporator (500) shown in FIG. 13, the upward refrigerant circulation section group (503U) disposed in the right half of the heat exchange section (500B) thereafter. ) Retains a relatively large amount of refrigerant at a relatively low temperature, and does not accumulate so much in the downward refrigerant circulation section group (503D) arranged in the left half, so that it passes through the left and right halves of the evaporator (500). There was a difference in the air temperature. On the other hand, in the case of the evaporator (1) shown in FIG. 2, in the rear heat exchange section (1B), a large amount of refrigerant is accumulated in the upward refrigerant circulation section group (3U) located on the left and right sides. In addition, there is almost no temperature difference between the left and right half of the rear heat exchange section (1B), and the air flow between the superheat section (30) of the front heat exchange section (1A) Since the upward refrigerant circulation section group (3U) on the left side of the rear heat exchange section (1B) is arranged so as to overlap in the direction, the temperature of the air passing through the left and right halves of the evaporator (1) is almost uniform To be kept.

  7 and 8 show a first embodiment of the present invention. The evaporator of this embodiment is the same as the evaporator of the above reference example except for the following points. First, as shown in FIG. 7, the number of the vertical refrigerant circulation portions (3) of the front and rear heat exchange portions (1A) and (1B) is twenty-one. Left-hand downward refrigerant circulation part group (3D), left-hand upward refrigerant circulation part group (3U), right-side downward refrigerant circulation part group (3D), right-side upward refrigerant circulation part group (3U) ) Are constituted by five, six, six and four refrigerant circulation sections (3), respectively.

  And the refrigerant | coolant which flows in into the upward refrigerant | coolant circulation part group (3U) of the right side of a back heat exchange part (1B) is four of the back heat exchange part (1B) which comprises this refrigerant | coolant circulation part group (3U). The front and rear heat exchange parts (1A) (1B) are divided so as to flow into the four refrigerant circulation parts (3) of the front heat exchange part (1A) adjacent to the refrigerant circulation part (3) and flow upward inside them. Portions of the lower header (2) corresponding to the plurality of refrigerant circulation portions (3) are communicated with each other by a diversion communication pipe portion (11) (diversion diversion means). Thereby, the pressure loss of the refrigerant is reduced.

  In the front heat exchange section (1A), the refrigerant flow in the four refrigerant circulation sections (3) on the right side of this is upward, the refrigerant flow in the next eight refrigerant circulation sections (3) is downward, and the remaining The upper and lower headers (2) are each divided into two left and right parts by vertical partitions (21) so that the refrigerant flows in the nine refrigerant flow sections (3).

  FIG. 8 shows a pair of plates (100) arranged at positions corresponding to the communication pipe part (6) and the diversion communication pipe part (11). In FIG. 8, the inner surface of one plate (100) is formed with a communication tube portion forming recess (106) extending in the front-rear direction so that the two front header forming recesses (102) communicate with each other. . A communicating tube portion (6) is formed by the communicating tube portion forming concave portion (106) of the one plate (100) and the inner surface portion of the other plate (100) facing this. In addition, on the inner surface of the other plate (100), a diversion communication pipe portion forming recess (111) extending in the front-rear direction is formed so as to allow the two front and rear lower header forming recesses (102) to communicate with each other. . A diversion communication pipe portion (11) is formed by the diversion communication pipe portion forming concave portion (111) of the other plate (100) and the inner surface portion of the one plate (100) facing this. .

  FIG. 9 shows a second embodiment of the present invention. This embodiment is the same as the first embodiment except for the following points. FIG. 9 shows a pair of plates (100) corresponding to FIG. 8 of the first embodiment, that is, plates (100) arranged at positions corresponding to the communication pipe part (6) and the diversion communication pipe part (11). ) Pairs are shown. The two refrigerant flow portion forming recesses (103) at the front and rear of each plate (100) constituting the plate (100) pair are integrated so as to communicate with each other over the entire length. In other words, on the inner surfaces of both plates (100), there is one large coolant circulation part forming recess (which has a width close to the width of the plate (100) and also serves as two front and rear coolant circulation part formation recesses ( 103A) is formed. That is, in the evaporator according to this embodiment, the four refrigerant circulation sections (3) of the rear heat exchange section (1B) constituting the upward refrigerant circulation section group (3U) on the right side, and the preheater adjacent thereto. The four refrigerant circulation parts (3) of the exchange part (1A) are integrated so as to communicate with each other (see FIGS. 1 and 2). With this configuration, it is possible to further reduce the pressure loss of the refrigerant. Further, the communication pipe part forming concave part (106) and the diversion communication pipe part forming concave part (111) are formed in both plates (100). The inner fin (9) has a width corresponding to the width of the recess (103A).

  10 to 12 show a second reference example. This reference example is the same as the first reference example except for the following points. That is, in the evaporator (1X) of this reference example, as shown in FIGS. 10 and 11, the upper and lower headers (2) of the front and rear heat exchange sections (1A) and (1B) have two tank chambers (121) inside and behind. It is formed by front and rear tank chambers (121) of a pair of upper and lower tanks (12) divided into two. In addition, the refrigerant circulation part (3) of the front and rear heat exchange parts (1A) and (1B) is formed with a large number of refrigerant circulation parts in two rows before and after the upper and lower ends are connected to the front and rear tank chambers (121) of the upper and lower tanks (12). It is formed by a vertical pipe (13) for use. The vertical partition (21) of the upper and lower headers (2) of the rear heat exchange section (1B) is provided by a vertical wall (122) provided so as to partition the rear tank chamber (121) of the upper and lower tanks (12) in the left-right direction. Is formed. The vertical partition (21) of the upper header (2) of the front heat exchange section (1A) is defined by a vertical wall (122) provided so as to partition the front tank chamber (121) of the upper tank (12) in the left-right direction. Is formed.

  Outer fins (8) are interposed between vertical pipes (13) adjacent to the left and right, and are joined to these outer surfaces. The tank (12), the vertical pipe (13), and the outer fin (8) are all made of aluminum or an aluminum alloy. These parts are usually joined by brazing.

  The vertical pipe (13) has a flat shape in which the width in the left-right direction is narrower than the width in the front-rear direction. As shown in FIG. 11, the left and right walls (131) having a flat outer surface and the left and right walls (131) And a plurality of vertical reinforcing walls (132) that are spaced apart from each other in the front-rear direction. Inside the vertical pipe (13), a plurality of refrigerant channels (133) arranged in parallel in the front-rear direction are formed.

  As shown in FIG. 10, the upper and lower tanks (12) are partitioned into two front and rear tank chambers (121) by a vertical partition wall (120) extending in the left-right direction. The right end of the vertical partition wall (120) of the upper tank (12) is provided with a communication hole (123) (communication means) for communicating the right ends of the front and rear tank chambers (121).

  FIG. 12 shows the flow of the refrigerant in the evaporator (1X), which is the same as that shown in FIG. That is, the refrigerant introduced into the evaporator (1X) from the refrigerant inlet (4) passes through the upper and lower headers (2) of the rear heat exchanging section (1B) and flows downward on the left side of the rear heat exchanging section (1B). After sequentially flowing through the circulation section group (3D), the left upward refrigerant circulation section group (3U), the right downward refrigerant circulation section group (3D), and the right upward refrigerant circulation section group (3U), the communication hole (123 ) Through the upper and lower headers (2) of the front heat exchange section (1A) and the left side refrigerant distribution section group (3D) and the left side of the front heat exchange section (1A) The refrigerant flows in the upward refrigerant circulation section group (3U) sequentially and is discharged from the refrigerant outlet (5).

  Each of the above embodiments is merely an example, and it is of course possible to implement the present invention with appropriate modifications without departing from the gist of the present invention described in the claims.

FIG. 2 is a perspective view showing a first reference example and an overall evaporator for a car air conditioner. It is a figure which shows the flow of the refrigerant | coolant in the evaporator of FIG. It is a perspective view which shows the normal plate pair among the components of the evaporator of FIG. It is a perspective view which shows the plate pair distribute | arranged to the position corresponding to the vertical partition of a header among the components of the evaporator of FIG. It is a perspective view which shows the plate pair distribute | arranged to the position corresponding to a communicating pipe part among the components of the evaporator of FIG. It is a perspective view which shows the left end plate, the left end plate, an outer fin, and the refrigerant | coolant distribution pipe connection member attachment plate among the components of the evaporator of FIG. It is a figure which shows the 1st Embodiment of this invention and shows the flow of the refrigerant | coolant in an evaporator. It is a perspective view which shows the plate pair distribute | arranged to the position corresponding to a communicating pipe part and a diversion communicating pipe part among the components of the evaporator by 1st Embodiment. The 2nd Embodiment of this invention is shown, Comprising: It is a perspective view of the plate pair distribute | arranged to the position corresponding to a communicating pipe part and a diversion communicating pipe part. It is a whole perspective view of the evaporator for car air-conditioners which shows the 2nd reference example. It is a partial expanded horizontal sectional view of the evaporator which follows the XI-XI line of FIG. It is a figure which shows the flow of the refrigerant | coolant in the evaporator of FIG. It is a figure which shows the flow of the refrigerant | coolant in the conventional evaporator.

Explanation of symbols

(1) (1X): Evaporator for car air conditioner
(1A): Front heat exchanger
(1B): Rear heat exchanger
(2): Header
(21): Vertical partition
(3): Refrigerant Distribution Department
(3U): Upward refrigerant distribution group
(3D): Downward refrigerant distribution group
(30): Super Heat Department
(4): Refrigerant inlet
(5): Refrigerant outlet
(6): Communication pipe (communication means)
(100): Plate
(102): Header forming recess
(102A): Bottom wall (in the recess)
(103): Recessed portion for forming refrigerant circulation portion
(104): Refrigerant passage hole
(11): Divided communication pipe (divided communication means)
(12): Tank
(121): Tank room
(122): Vertical wall
(123): Communication hole (communication means)
(13): Vertical pipe for forming refrigerant circulation section

Claims (5)

It has a front heat exchange section on the air inlet side and a rear heat exchange section on the air outlet side that are adjacent to each other, and each heat exchange section is arranged with a pair of upper and lower headers extending in the left-right direction and spaced in the left-right direction. And a large number of refrigerant flow sections, each having an upper end connected to the upper header and a lower end connected to the lower header, and a refrigerant inlet at one end of either the upper or lower header of the rear heat exchanging section A refrigerant outlet is provided at one end of each header, and the other end portion of the upper or lower header of the rear heat exchanging portion and the other end portion of the upper or lower header of the front heat exchanging portion are communicated by the communicating means. An evaporator,
At least one of the upper and lower headers of the rear heat exchanging section is arranged in the left and right direction in the header so that the direction of the refrigerant flow in the refrigerant circulation section of the rear heat exchanging section is inverted vertically for each of the plurality of refrigerant circulation sections. There is a vertical partition to partition,
The refrigerant flowing into the upward refrigerant circulation section group of the rear heat exchange section located farthest from the refrigerant inlet is preheated adjacent to the plurality of refrigerant circulation sections of the rear heat exchange section constituting the refrigerant circulation section group. The parts corresponding to the plurality of refrigerant circulation parts in the lower header of the front and rear heat exchange part are communicated by the diversion communication means so as to be diverted to the plurality of refrigerant circulation parts of the exchange part and to flow upward inside these parts. The evaporator. It has a front heat exchange section on the air inlet side and a rear heat exchange section on the air outlet side that are adjacent to each other, and each heat exchange section is arranged with a pair of upper and lower headers extending in the left-right direction and spaced in the left-right direction. And a large number of refrigerant flow sections, each having an upper end connected to the upper header and a lower end connected to the lower header, and a refrigerant inlet at one end of either the upper or lower header of the rear heat exchanging section A refrigerant outlet is provided at one end of each header, and the other end portion of the upper or lower header of the rear heat exchanging portion and the other end portion of the upper or lower header of the front heat exchanging portion are communicated by the communicating means. An evaporator,
At least one of the upper and lower headers of the rear heat exchanging section is arranged in the left and right direction in the header so that the direction of the refrigerant flow in the refrigerant circulation section of the rear heat exchanging section is inverted vertically for each of the plurality of refrigerant circulation sections. There is a vertical partition to partition,
The refrigerant flowing into the downward refrigerant circulation portion group of the rear heat exchange portion located farthest from the refrigerant inlet is preheated adjacent to the plurality of refrigerant circulation portions of the rear heat exchange portion constituting the refrigerant circulation portion group. The parts corresponding to the plurality of refrigerant circulation parts in the upper header of the front and rear heat exchange parts are communicated by the diversion communication means so as to be diverted to the plurality of refrigerant circulation parts of the exchange part and to flow downward inside these parts. The evaporator.   A pair of upper and lower header forming recesses on one side and a pair of upper and lower header forming recesses and upper and lower ends of the coolant circulation portion forming recesses are connected to the front and rear heat exchange units. A pair of plates are joined so that these recesses face each other, and a large number of the plate pairs are stacked to join the bottom walls of these header forming recesses to allow the refrigerant to pass therethrough. A coolant passage hole is formed in the bottom wall of the header forming recess arranged at the power position, and a vertical partition is formed by the bottom wall of the rear upper and lower header forming recess without the coolant passage hole. The evaporator according to claim 1 or 2.   The front and rear headers of the front and rear heat exchange section are formed by two front and rear tank chambers in a pair of upper and lower tanks, and the refrigerant circulation section of the front and rear heat exchange section is front and rear 2 connected to the front and rear tank chambers of the upper and lower tanks. 3. The vertical partition is formed by walls provided so as to divide the rear tank chamber of the upper and lower tanks in the left-right direction. Evaporator.   A car air conditioner comprising the evaporator according to any one of claims 1 to 4.

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