JP6329806B2 - Evaporator with cool storage function - Google Patents

Description

  The present invention relates to an evaporator with a cold storage function.

  For example, for the purpose of protecting the environment and improving the fuel consumption of an automobile, an automobile that automatically stops the engine when the vehicle stops, such as waiting for a signal, has been proposed.

  However, in a normal car air conditioner, when the engine is stopped, the compressor using the engine as a driving source stops, so that the refrigerant (medium for transporting cold heat) is not supplied to the evaporator, and the cooling capacity is rapidly reduced. There is a problem.

  Therefore, in order to solve such problems, the evaporator is provided with a cold storage function, and when the engine stops and the compressor stops, the cold stored in the evaporator is discharged to cool the vehicle interior. Is considered.

  As an evaporator with this kind of cold storage function, two flat refrigerant circulation pipes having a longitudinal direction facing the up-and-down direction and a width direction facing the ventilation direction and spaced apart in the ventilation direction are formed on the heat exchange core portion. A plurality of pipe sets are arranged at intervals in the thickness direction of the refrigerant flow pipe, a gap is formed between adjacent pipe sets, and a regenerator material is provided in each of the plurality of gaps as part of the whole gap. One regenerator material container in which is enclosed is placed and brazed to the refrigerant flow pipe, and one fin is arranged in each remaining gap and brazed to the refrigerant flow pipe, and the regenerator material container is placed in the gap. The fin is located in at least one of the gaps on both sides of the cold storage container, and the cool storage material container is composed of two metal container constituting plates in which peripheral belt-shaped parts having a certain width are brazed to each other. , Both container component plates The portions excluding the brazed belt portions are bulged outward to provide a bulging regenerator enclosing part in the regenerator container, and the regenerator material is placed in the regenerator enclosing part. The regenerator container is entirely located within the range of the air exchange direction of the heat exchange core part, and is composed of strip-like parts of both container component plates brazed to the leeward part and the leeward part of the regenerator container, and A continuous straight vertical belt-shaped brazing portion having a length equal to the vertical length of the cold storage material container and a certain width is provided, and the leeward side edge and the windward side edge of the cold storage material enclosure are vertically linear The leeward end of the leeward refrigerant circulation pipe and the leeward end of the windward refrigerant circulation pipe are the leeward end of the leeward vertical belt brazing part and the windward vertical belt brazing part of the cold storage material container. The same position in the ventilation direction as the windward end of Is an evaporator with a cool storage function in a direction outward position is known (see Patent Document 1, FIGS. 20 to 23, Figure 28).

  However, in the evaporator with a cool storage function described in Patent Document 1, the leeward side edge and the windward side edge of the cool storage material enclosure of the cool storage material container are vertically linear, and the leeward side of the refrigeration coolant pipe of the coolant circulation pipe The side end and the windward end of the windward refrigerant flow pipe are the same in the ventilation direction as the windward end of the leeward vertical belt brazing part and the windward end of the windward vertical belt brazing part of the cool storage material container. Therefore, the width of the portion in contact with the refrigerant flow pipe in the cool storage material enclosure of the cool storage material container is relatively small, and the amount of cool storage material that can be enclosed in the cool storage material enclosure is relatively small. The effect may be insufficient. Also, if the width of the cool storage material enclosure is increased in order to increase the amount of cool storage material that can be enclosed in the cool storage material enclosure, the width of the heat exchange core is increased in the ventilation direction, and the evaporator with the cold storage function is large. There is a risk of becoming.

JP 2011-12947 A

  The objective of this invention is providing the evaporator with a cool storage function which can solve the said problem, can improve the cool storage effect, and can suppress the enlargement of the whole.

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

1) In the heat exchange core portion, a plurality of flat refrigerant flow pipes whose longitudinal direction faces the vertical direction and whose width direction faces the ventilation direction are arranged in parallel at intervals in the thickness direction of the refrigerant flow pipe, A gap is formed between adjacent refrigerant flow pipes, and a cold storage material container in which a cold storage material is sealed is disposed in a part of the entire gap and a plurality of gaps, and brazed to the refrigerant flow pipe, Fins are respectively disposed in the remaining gaps and brazed to the refrigerant flow pipe, and the fins are located in at least one of the gaps on both sides of the gap where the cold storage material container is disposed. Is composed of two metal container constituent plates in which peripheral strips having a certain width are brazed to each other, and brazed strips in at least one of the container constituent plates. The part except the outside The cool storage material container is provided with a swelled cool storage material enclosure, and the cool storage material is placed in the cool storage material enclosure, and the cool storage container is in the range of the ventilation direction of the heat exchange core section. It is an evaporator with a cold storage function having a container body portion located inside,
The leeward side portion and the windward side portion of the container body portion of the cold storage material container are composed of belt-like portions of both container component plates brazed to each other, and have a length of 70% or more of the vertical length of the cold storage material container; A continuous straight vertical belt brazing part having a constant width is provided, and the regenerator material enclosing part has the same width as the straight distance in the ventilation direction between the vertical belt brazing parts and the leeward vertical belt brazing. The main enclosure part having a substantially vertical rectangular shape having a height equal to or greater than the vertical length of the attachment part, the leeward side edge part and the leeward side edge part of the main enclosure part are vertically straight, and the regenerator material enclosure part The dimension in the ventilation direction in the main enclosure part is 85% or more of the dimension in the ventilation direction of the heat exchange core part, and the leeward side end part of the refrigerant flow pipe at the downstream end part in the ventilation direction of the gap is the main enclosure part. A vertical belt-like braze on the leeward side of the leeward side of the cold storage container Located on the leeward side of the leeward side end of the part, and at the upstream end of the gap in the ventilation direction, the leeward end of the refrigerant flow pipe and the windward side end of the windward vertical belt brazing part of the cold storage material container Evaporator with cool storage function at the same position in the ventilation direction.

  2) The leeward end of the leeward vertical belt brazing part and the windward end of the windward vertical belt brazing part of the cold storage material container, and the leeward side edge and the windward end of the fin, respectively, are in the direction of ventilation. The evaporator with a cold storage function according to 1) above, wherein the linear distance between the leeward side end portion and the windward side end portion of the fin is equal to the entire width of the heat exchange core portion in the ventilation direction.

  3) In the vertical strip brazing part on the leeward side and on the windward side of the cold storage material container, one of the two belt parts brazed to each other of the two container constituting plates constituting the cold storage material container The engagement portion that protrudes outward in the ventilation direction from the ventilation direction outer end portion of the other belt-like portion and engages with the ventilation direction outer end portion of the other belt-like portion is provided in the ventilation direction outer end portion. An evaporator with a cold storage function as described in 1) or 2).

  4) At the downstream end in the ventilation direction of the gap where the cool storage material container is disposed, the width in the ventilation direction of the leeward vertical belt-like brazed portion including the engagement portion in the cool storage material container is Zmm, and the engagement portion is included. The linear distance in the ventilation direction between the leeward side end of the leeward vertical belt-like brazed part and the leeward side end of the refrigerant flow pipe is X mm, the leeward side end of the refrigerant flow pipe, and the thickness direction of the refrigerant flow pipe The evaporator with a cool storage function according to 3), wherein the linear distance in the ventilation direction between the leeward side end portions of the flat portions parallel to each other on both side surfaces is Ymm, and satisfies the relationship of Z− (X + Y) <1.

  5) The cold storage according to 4) above, wherein the linear distance X in the ventilation direction between the leeward side end of the leeward vertical belt-like brazed part including the engaging part and the leeward side end of the refrigerant flow pipe is 2 mm or less. Evaporator with function.

  6) A plurality of convex portions having outwardly bulging and flat bulging top walls are formed on both side walls of the refrigerant enclosing portion in the arrangement direction of the refrigerant flow pipes in the main enclosing portion of the regenerator material, At least a part of the top wall is brazed to the refrigerant flow pipe, and the leeward side end of at least a part of the convex part and the leeward side end part of the main enclosure part are in the same position in the ventilation direction, and the convex part The evaporator with a cool storage function according to any one of the above 1) to 5), wherein a fillet is formed between the leeward side end portion and the refrigerant flow pipe.

  7) A plurality of condensate drainage channels are formed at intervals on the outer side surfaces of the side walls of the refrigerant circulation pipes in the main enclosing portion of the regenerator enclosing portion, and at least a part of all the condensate drainage channels is formed. One end of the condensate drainage channel opens to the leeward side of the main enclosing portion of the regenerator material enclosing portion, and each condensate drainage channel is provided on the both side walls of the main enclosing portion and bulges outward. A leeward side end portion of a convex portion that is formed between two convex portions having a flat bulging top wall and has one end opened to the leeward side of the main enclosure portion, and the main enclosure portion The evaporator with a cold storage function as described in 6) above, wherein the leeward side edge portion is at the same position in the ventilation direction.

  8) Condensate drainage channels are gradually lowered from the upper end to the lower end and both ends are open, and the upper end of some of the condensate drainage channels is the regenerator enclosure. The evaporator with a cold storage function according to the above 7), which is open to the leeward side of the main enclosure.

  9) A straight portion of a certain length extending in the vertical direction is provided at the leeward end of the convex portion forming the condensed water drainage channel whose upper end opens to the leeward side of the main enclosure of the regenerator enclosure. When viewed from both sides in the direction in which the refrigerant flow pipes are arranged, the straight part and the leeward side edge of the main enclosure part are located on the same straight line, and the leeward side end part of the convex part and the refrigerant flow pipe The evaporator with a cool storage function as described in 8) above, wherein a fillet is formed therebetween.

  10) A cold storage material is provided with an outward projecting portion that extends to the outside of the refrigerant flow pipe and extends outward in the ventilation direction, continuing to only a part of the total length in the vertical direction at the upper part of the leeward side edge of the container body portion of the cold storage material container. Among the above 1) to 9), the enclosure part is provided across the container body part and the outward projecting part, and the vertical length of the outward projecting part is shorter than the vertical length of the cool storage material container An evaporator with a cold storage function according to any one of the above.

  11) A tube assembly composed of a plurality of flat refrigerant flow tubes arranged in the longitudinal direction and the width direction in the ventilation direction and spaced in the ventilation direction is spaced in the thickness direction of the refrigerant flow tube. The evaporator with a cool storage function according to any one of 1) to 10) above, wherein a plurality of gaps are arranged and a gap is formed between adjacent pipe sets.

According to the evaporator with a cool storage function of the above 1) to 11), the cool storage material is composed of the strip-shaped portions of both container constituent plates brazed to the leeward side portion and the windward side portion of the container main body portion of the cool storage material container, and A continuous linear vertical belt-like brazing part having a length of 70% or more of the vertical length of the container and a certain width is provided, and the regenerator material enclosing part is between the vertical belt-like brazing parts A main enclosure having a substantially vertical rectangular shape having a width equal to the linear distance in the ventilation direction and a height equal to or greater than the vertical length of the leeward vertical belt-like brazing part, and the leeward side edge of the main enclosure The windward side edge is a vertical straight line, and the dimension in the ventilation direction in the main enclosure of the regenerator enclosure is 85% or more of the dimension in the ventilation direction of the heat exchange core, so the regenerator enclosure While the width of the ventilation direction in the heat transfer part is relatively large, the inside of the cool storage material enclosure It is possible to relatively increase the amount of cold accumulating material can be sealed, thereby improving the cold accumulating effect of storing cold energy in the cold accumulating material. Further, at the downstream end portion in the ventilation direction of the gap where the cool storage material container is arranged, the leeward side end portion of the refrigerant circulation pipe is leeward side of the leeward side end portion of the main enclosure and is perpendicular to the leeward side of the cool storage material container. Located on the windward side of the leeward side end of the belt-like brazing part, at the upstream end of the gap in the ventilation direction, the windward side of the windward side of the refrigerant flow pipe and the windward side of the cold storage material container Since the end portion is at the same position in the ventilation direction, the size of the cooling storage material enclosure in the main enclosure is set to 85% or more of the dimension in the ventilation direction of the heat exchange core, and then the heat exchange core Thus, it is possible to prevent a significant increase in the width in the ventilation direction, and it is possible to suppress an increase in the size of the evaporator with a cold storage function.

  According to the evaporator with a cold storage function of 2) above, the work for combining the refrigerant distribution pipe or the material for forming the refrigerant distribution pipe, the container component plate, and the fins during the temporary assembly before brazing of each member in the manufacturing process Can be performed relatively easily.

  According to the evaporator with a cold storage function of 3) above, the combination of the two container constituent plates can be easily performed without misalignment in the temporary assembly before brazing of the respective members in the manufacturing process.

  According to the evaporator with the cold storage function of 4), the improvement of the cold storage effect described in 1) and the suppression of the enlargement of the evaporator with the cold storage function can be effectively performed.

  According to the evaporator with a cold storage function of 5) above, it is possible to effectively prevent a significant increase in the width of the heat exchange core portion in the ventilation direction within a range that does not deteriorate the drainage performance from the leeward side end portion of the fin. Become.

  According to the evaporator with a cool storage function of 6) above, the rounded surface is formed between the outer surface of the bulging top wall of the convex portion and the outer surface of the peripheral wall, so that the outer surface of the bulging top wall of the convex portion and the refrigerant circulation pipe are in contact with each other. Even when the area decreases, it is possible to suppress a decrease in thermal conductivity between the convex portion and the refrigerant flow pipe.

  According to the evaporator with a cool storage function of the above 7), the same effect as the evaporator with a cool storage function of the above 6) can be obtained while ensuring drainage of condensed water.

  According to the evaporator with the cold storage function of 8) above, the condensed water flows downwindward, slows the drainage speed of the condensed water, and the sensible heat of the condensed water itself is the cooling duration time. Contribute to extension. In addition, when the evaporator with a cold storage function is placed in the car air conditioner casing in an inclined posture so that the upper end side is located on the windward side, the condensate drainage channel is almost vertical, ensuring drainage. can do. .

  According to the evaporator with a cold storage function of 9) above, the rounded surface is formed between the outer surface of the bulging top wall of the convex portion and the outer surface of the peripheral wall, so that the outer surface of the bulging top wall of the convex portion and the refrigerant circulation pipe are in contact with each other. Even when the area decreases, it is possible to suppress a decrease in thermal conductivity between the convex portion and the refrigerant flow pipe.

  According to the evaporator with a cool storage function of 10) above, it is possible to reduce the size and weight compared to the case where an outward projecting portion that projects outward from the refrigerant flow pipe is provided over the entire length of the cool storage material container in the vertical direction. Can do. Moreover, it becomes possible to reduce the part which is not in contact with the refrigerant | coolant distribution pipe | tube in a cool storage material container, and can cool many cool storage materials enclosed in the cool storage material container effectively.

1 is a partially cutaway perspective view showing an overall configuration of an evaporator with a cold storage function according to the present invention. It is a left view which shows the cool storage material container used for the evaporator with a cool storage function of FIG. It is an AA line expanded sectional view of FIG. FIG. 4 is a partially enlarged view of FIG. 3.

  Embodiments of the present invention will be described below with reference to the drawings.

  In the following description, the downstream side in the ventilation direction (the direction indicated by the arrow X in FIGS. 1 to 3) is the front side, and the opposite side is the rear side. The upper and lower sides and the right and left sides are called up and down and left and right.

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

  FIG. 1 shows the overall configuration of an evaporator with a cold storage function according to the present invention, and FIGS.

  In FIG. 1, an evaporator with a cold storage function (1) includes an aluminum first header tank (2) and an aluminum second header tank (2) arranged at intervals in the vertical direction with the longitudinal direction directed in the horizontal direction. 3) and a heat exchange core section (4) provided between the header tanks (2) and (3).

  The first header tank (2) is located on the leeward upper header part (5) located on the front side (downstream side in the ventilation direction) and on the leeward side upper header part (5) located on the rear side (upstream side in the ventilation direction). And an integrated upwind header section (6). A refrigerant inlet (7) is provided at the left end of the leeward upper header portion (5), and a refrigerant outlet (8) is provided at the left end of the leeward upper header portion (6). The second header tank (3) includes a leeward lower header portion (9) located on the front side and an upwind lower header portion (11) located on the rear side and integrated with the leeward lower header portion (9). And.

  The heat exchange core section (4) has a plurality of aluminum flat refrigerant flow pipes (12) whose longitudinal direction faces the up-down direction and whose width direction faces the ventilation direction (front-rear direction). (12) in the thickness direction) and arranged in parallel. Here, a plurality of sets (13) consisting of two refrigerant flow pipes (12) arranged at intervals in the front-rear direction are arranged at intervals in the left-right direction, and the front and rear refrigerant flow pipes (12) A gap (14A) (14B) is formed between adjacent members of the set (13). An upper end portion of the front refrigerant flow pipe (12) is connected to the leeward upper header portion (5), and a lower end portion thereof is connected to the leeward lower header portion (9). Further, the upper end portion of the rear refrigerant flow pipe (12) is connected to the windward upper header portion (6), and the lower end portion thereof is connected to the windward lower header portion (11).

  Aluminum in which a regenerator material (not shown) is enclosed in a plurality of gaps (14A) and non-adjacent gaps (14A) of all gaps (14A) (14B) in heat exchange core (4) A cold storage container (15) is disposed across the front and rear refrigerant flow pipes (12), and is disposed across the front and rear refrigerant flow pipes (12) to form both the left and right refrigerant flow pipes (12) forming a gap (14A). It is brazed.

  Of the total gap (14A) (14B) in the heat exchange core part (4), the remaining gap (14B) is made of an aluminum brazing sheet having a brazing filler metal layer on both sides, and the wave crest extends in the front-rear direction, in the front-rear direction. A corrugated outer fin (16) composed of a corrugated bottom portion that extends and a connecting portion that connects the corrugated portion and the wave bottom portion is disposed so as to straddle the front and rear refrigerant flow pipes (12) to form a gap (14B). It is brazed to the front and rear refrigerant flow pipes (12) that constitute the left and right sets (13). In this embodiment, outer fins (16) are respectively arranged in the gaps (14B) adjacent to the left and right sides of the gap (14A) in which the cold storage material container (15) is arranged, and the cold storage materials adjacent in the left-right direction are arranged. A plurality of, here two outer fins (16) are located between the containers (15). The number of outer fins (16) positioned between the cold storage material containers (15) adjacent in the left-right direction is not limited to two, and may be three or more. In addition, outer fins (16) made of an aluminum brazing sheet having brazing filler metal layers on both sides are also arranged outside the set (13) of the refrigerant flow pipes (12) at both left and right ends, and the front and rear refrigerant flow pipes (12). An aluminum side plate (17) is disposed outside the outer fins (16) at both left and right ends and brazed to the outer fins (16).

In the case of the evaporator (1) of this embodiment, the refrigerant passes through the refrigerant inlet (7) and enters the leeward upper header portion (5) of the evaporator (1) and passes through the entire refrigerant circulation pipe (12). It flows out from the refrigerant outlet (8) of the upper upper header section (6).

  As shown in FIGS. 2 to 4, the cool storage material container (15) is a flat hollow shape of a substantially vertical rectangle with the longitudinal direction facing the up-down direction and the width direction facing the front-rear direction, and the heat exchange core portion (4 ) And the container body (18) brazed to the two refrigerant flow pipes (12) before and after each pair (13), and the front edge of the container body (18). A part of the (leeward side edge part), here, the outer projecting part (19) provided so as to project only forward (outward in the ventilation direction) from the front end of the outer fin (16) while continuing to only the upper part. The outward projecting portion (19) is provided over a certain length from the portion slightly lowered from the upper end of the cool storage material container (15), for example, 30% or less of the vertical length of the cool storage material container (15). ing.

  The cold storage material container (15) is formed by pressing an aluminum brazing sheet having a brazing filler metal layer on both sides, and the peripheral strips (23) (24) having a certain width are brazed to each other. It is composed of two substantially vertical rectangular aluminum container constituent plates (21) and (22). In the cool storage material container (15), the parts excluding the strips (23) and (24) of both container component plates (21) and (22) are bulged outwardly, so that a hollow cool storage material enclosing part ( 25) is formed so as to straddle the container main body (18) and the outward projecting portion (19), and a cold storage material (not shown) is placed in the cold storage material enclosing portion (25). The thickness of the cool storage material enclosure (25) in the left-right direction is equal throughout the container body (18) and the outwardly projecting portion (19).

  Consists of strips (23) and (24) of both container component plates (21) and (22) brazed to each of the leeward side and the windward side of the cold storage material container (15) and extending vertically The straight vertical belt-like brazing portions (26) and (27) are provided. In addition, the upper and lower ends of the regenerator container (15) consist of strips (23) and (24) of the two container component plates (21) and (22) brazed to each other, and are continuous straight lines extending in the ventilation direction. A horizontal belt-like brazing part (28) (29) is provided. The leeward vertical belt-like brazing part (26) of the cool storage material container (15) is provided below the outward projecting part (19), and its length is in the vertical direction of the cool storage material container (15). It is 70% or more and less than 100% of the length. The windward vertical belt brazing part (27) of the cold storage material container (15) is provided over almost the entire length in the vertical direction of the cold storage material container (15), and the length thereof is above and below the cold storage material container (15). The length obtained by subtracting the vertical dimension of the roundness provided at the joint of the windward vertical belt brazing part (27) and the upper and lower horizontal belt brazing parts (28) (29) from the length in the direction, that is, It is 70% or more and less than 100% of the vertical length of the cold storage material container (15). Further, in the leeward vertical belt brazing part (26) and the windward vertical belt brazing part (27) of the cool storage material container (15), two container constituting plates (21) constituting the cool storage material container (15) One of the two belt-like portions (23) and (24) brazed to each other (22), here, on the outer end of the belt-like portion (23) of the left-side container constituting plate (21), An engagement portion (31) is provided that protrudes outward from the outer end portion of the strip portion (24) of the plate (22) and engages with the outer end portion of the strip portion (24).

The cold storage material enclosing portion (25) of the cold storage material container (15) has the same width as the straight distance in the ventilation direction between the vertical belt brazing portions (26) and (27) and the leeward vertical belt brazing portion (26). A main enclosing portion (30) having a substantially vertical rectangular shape having a height equal to or greater than the vertical length of the main enclosure (30). Here, the height of the main enclosure (30) is the dimension obtained by subtracting the width of the upper and lower horizontal strip brazing parts (28) (29) from the total height of the cool storage material container (15) except for a part on the leeward side. It has become. The leeward edge and the windward edge of the main enclosure (30) of the cool storage material enclosure (25) are vertically straight, and the width W1 in the ventilation direction in the main enclosure (30) is: It is 85% or more of the total width W in the ventilation direction of the heat exchange core part (4).

  At the downstream end in the ventilation direction of the gap (14A) where the cool storage material container (15) is disposed, the leeward side end of the front refrigerant flow pipe (12) is the cool storage material enclosure (25) of the cool storage material container (15). ) On the leeward side of the leeward side end of the main enclosure portion (30) and on the leeward side of the leeward side end of the leeward vertical belt-like brazing part (26). Here, the width in the ventilation direction of the leeward vertical belt-like brazing part (26) including the engaging part (31) in the cold storage material container (15) is Zmm, and the leeward vertical belt-like shape including the engaging part (31) The linear distance in the ventilation direction between the leeward end of the brazing part (26) and the leeward end of the front refrigerant flow pipe (12) is X mm, the leeward end of the front refrigerant flow pipe (12), Z- (X + Y), where Ymm is the linear distance in the ventilation direction from the leeward side ends of the parallel flat portions (12a) on the left and right side surfaces (both sides in the thickness direction) of the front refrigerant flow pipe (12) It is preferable that the relationship <1 is satisfied. That is, the straight line in the ventilation direction between the windward end of the leeward vertical belt-like brazed part (26) and the leeward end of the flat part (12a) parallel to each other on the left and right side surfaces of the front refrigerant flow pipe (12) The distance k is preferably less than 1 mm. The X is preferably 2 mm or less.

  At the upstream end in the ventilation direction of the gap (14A) where the cool storage material container (15) is arranged, the windward end of the rear refrigerant flow pipe (12) and the windward vertical belt-like brazed portion of the cool storage material container (15) The windward end of (27) is at the same position in the ventilation direction. Further, the leeward side end of the leeward vertical belt-like brazing part (26) and the windward side end part of the windward vertical belt-like brazing part (27) of the cold storage material container (15), and the leeward side of the outer fin (16) The end portion and the windward end portion are in the same position in the ventilation direction, and the width of the outer fin (16), that is, the linear distance between the leeward end portion and the windward end portion is the heat exchange core portion (4). It is equal to the full width W in the ventilation direction.

  On the outer surface of the portion constituting the main enclosure (30) in the left and right side walls (25a) of the cold storage enclosure (25) of the cold storage container (15), the upper and lower ends are gradually lowered from the upper end to the lower end, respectively. A plurality of open condensate drains (32), (33) are formed at intervals. Here, the upper end is the first condensate drainage channel (32) opened to the leeward side of the main enclosure (30) in the regenerator enclosure (25) of the regenerator container (15), and the upper end is the regenerator container. A second condensate drainage channel (33) opened above the main enclosure (30) in the cold storage material enclosure (25) of (15) is provided. The lower end of the first condensate drainage channel (32) opens to the windward side of the main enclosure (30) of the cool storage material enclosure (25) or below the main enclosure (30), and the second condensate drainage channel (32). The lower end of (33) opens to the windward side of the main enclosure (30) of the regenerator enclosure (25).

  Each condensate drainage channel (32) (33) is provided on the outer side of the container body (18) in the left and right side walls (25a) of the cool storage material enclosure (25) of the cool storage material container (15). Is formed between two convex portions (34) bulging in the direction, and at least one of the two convex portions (34) forming one condensed water drainage channel (32) (33) The length of the part (34) is longer than the width in the ventilation direction of the container body (18) of the cool storage material container (15). Two adjacent condensate drainage channels (32) and (33) share a convex portion (34) located between the two condensate drainage channels (32) and (33). The bulging top walls of all the convex portions (34) are flat and located on the same vertical plane, and the flat bulging top walls of the convex portions (34) are in contact with the refrigerant flow pipe (12). It is brazed. Condensate drainage channels (32), (33) and projections (34) on the left side wall (25a) and condensate drainage channels (32) (33) and projections (34) on the right side wall (25a) are partially Are overlapped with each other in the ventilation direction in the same horizontal plane so that they do not overlap with each other. A very small amount of air also flows through the condensed water drainage channels (32) and (33).

  The leeward side end of the convex part (34) forming the first condensed water drainage channel (32) whose upper end is located below the outward projecting part (19) among all the first condensed water drainage channels (32) In addition, a straight portion (34a) of a certain length extending in the vertical direction is provided, and when viewed from the left-right direction (both sides of the direction in which the refrigerant flow pipes (12) are arranged), the straight portion (34a) The cool storage material enclosure part (25) of the regenerator material container (15) is positioned on the same straight line as the leeward side edge of the main enclosure part (30), and the leeward side end part of the convex part (34) and the front refrigerant flow A fillet (35) is formed between the tube (12).

  In the container main body portion (18) of the cool storage material container (15), an offset aluminum inner fin (36) is disposed over substantially the entire vertical direction. The inner fin (36) includes a wave crest portion (37a) extending in the vertical direction, a wave bottom portion (37b) extending in the vertical direction, and a connecting portion (37c) connecting the wave crest portion (37a) and the wave bottom portion (37b). A plurality of corrugated strips (37) are arranged in the vertical direction and are integrally connected to each other, and the wave crests (37a) and the wave bottoms of two corrugated strips (37) adjacent in the vertical direction are formed. (37b) The two are displaced in the front-rear direction. The vertical lengths of the wave crest portion (37a), the wave bottom portion (37b), and the connecting portion (37c) in each corrugated strip (37) are equal. The inner fin (36) is the inner surface of the portion constituting the main enclosure (30) in the left and right side walls (25a) of the regenerator enclosure (25) of the regenerator container (15), that is, the convex section (32). (33) is brazed to the part where it is not formed. The bulging top wall of the convex portions (32), (33) contacts the refrigerant flow pipe (12) but does not contact the inner fin (36), so the cold storage material enclosing portion (25 of the cold storage material container (15)) ) On both the left and right side walls (25a) are provided with a contact portion that contacts the inner fin (36) and a non-contact portion that does not contact the inner fin (36). Will be.

  The outwardly projecting portion (19) of the cold storage material container (15) is provided over a certain length from a portion slightly below the upper end of the front edge of the container body (18), and the outwardly projecting portion ( The vertical length of 19) is shorter than the vertical length of the container body (18). The vertical length of the outwardly projecting portion (19) is preferably 30% or less of the vertical length of the cold storage material container (15). The portion of the cool storage material enclosure (15) of the cool storage material container (15) that swells in the left and right side walls (25a) on the outwardly projecting portion (19) expands in both the left and right directions, and the dimensions in the left and right direction are the cool storage material enclosure An expansion part (19a) larger than the lateral dimension of (25) is provided, and the expansion part (19a) is outside the ventilation direction of the outer fin (16) at the lower end of the ventilation direction (downstream of the ventilation direction). Side).

  As the regenerator material filled in the regenerator material container (15), a paraffin-based latent heat regenerator material whose freezing point is adjusted to about 5 to 10 ° C is used. Specifically, pentadecane, tetradecane, or the like is used. It is preferable that the cold storage material filling ratio, which is the ratio of the volume of the enclosed cold storage material to the internal volume in the cold storage material enclosure (25) of the cold storage material container (15), is 70 to 90%. Here, the upper end of the inner fin (36) is preferably located above the upper end of the regenerator material enclosed in the regenerator material container (15). In this case, the cold storage material is always in contact with the inner fin (36) both in the cold storage in which the cold storage material stores the cold energy and in the cool discharge in which the cold energy stored in the cold storage material is discharged.

  The cool storage material injection member (38) is fixed to the upper end portion of the outwardly projecting portion (19) of the cool storage material container (15), and the cool storage material is passed through the cool storage material injection member (38) and the cool storage material enclosing portion (25 The cool storage material injection member (38) is sealed after the cool storage material is injected into the heat storage material enclosure (25).

  The evaporator with a cold storage function (1) described above includes a compressor that uses a vehicle engine as a drive source, a condenser that cools the refrigerant discharged from the compressor (refrigerant cooler), and an expansion valve that depressurizes the refrigerant that has passed through the condenser ( A refrigeration cycle is configured together with a decompressor, and is mounted as a car air conditioner on a vehicle, such as an automobile, that temporarily stops an engine that is a drive source of a compressor when the vehicle is stopped. When the compressor is operating, the low-pressure gas-liquid mixed-phase two-phase refrigerant compressed by the compressor and passed through the condenser and the expansion valve passes through the refrigerant inlet (7) and the evaporator with the cold storage function (1) Enters the leeward upper header portion (5) and flows out from the refrigerant outlet (8) of the leeward upper header portion (6) through the entire refrigerant flow pipe (12). Then, the refrigerant exchanges heat with the air passing through the gap (14B) while the refrigerant flows in the refrigerant flow pipe (12), and the refrigerant flows out as a gas phase.

  During the operation of the compressor, the cold heat of the refrigerant flowing in the refrigerant flow pipe (12) passes through the main enclosure (30) in the left and right side walls (25a) of the cold storage enclosure (25) of the cold storage container (15). It is transmitted directly to the cool storage material in the cool storage material container (15) through the bulging top wall of the convex part (34) provided in the constituent part, and from the bulging top wall of the convex part (34) to the left and right side walls (25a ) Is transferred to the whole of the regenerator material in the regenerator material container (15) via the portion not brazed to the refrigerant flow pipe (12) and the inner fin (36), and cold energy is stored in the regenerator material.

  In addition, during the operation of the compressor, condensed water is generated on the surface of the cold storage material container (15), the condensed water enters the condensed water drainage channel (32) (33), and the condensed water drainage channel (32) due to surface tension. It accumulates in the condensed water drainage channels (32) and (33) along the convex portions (34) on both sides of (33). When the amount of accumulated condensed water increases, the gravity acting on the accumulated condensed water becomes larger than the surface tension, and flows down in the condensed water drainage channels (32) and (33) and drains downward.

   When the compressor is stopped, the cold energy stored in the regenerator material in the regenerator material container (15) is converted into the main enclosing part (30a) in the left and right side walls (25a) of the regenerator material enclosure part (25) of the regenerator container (15). ) Is directly transmitted to the refrigerant flow pipe (12) through the bulging top wall of the convex part (34) provided in the part constituting the refrigerant flow pipe (12) and the refrigerant flow pipe (12a on the left and right side walls (25a) from the inner fin (36). ) Is transmitted to the refrigerant flow pipe (12) through the bulging top wall of the part and the convex part (34) not brazed, and further passes through the refrigerant flow pipe (12) in the refrigerant flow pipe (12). It is transmitted to the outer fin (16) brazed on the opposite side to the cold storage material container (15). The cold heat transmitted to the outer fin (16) is transmitted to the air passing through the gap (14B) adjacent to the gap (14A) in which the cool storage material container (15) is arranged. The cold heat transmitted to the outer fin (16) is transmitted to the air passing through the gap (14B) adjacent to the gap (14A) in which the cool storage material container (15) is arranged. Therefore, even if the temperature of the wind that has passed through the evaporator (1) rises, the wind is cooled, so that a rapid decrease in the cooling capacity is prevented.

  The evaporator with a cold storage function according to the present invention is suitably used in a refrigeration cycle constituting a car air conditioner for a vehicle that temporarily stops an engine that is a drive source of a compressor when the vehicle is stopped.

(1): Evaporator with cool storage function
(4): Heat exchange core
(12): Refrigerant distribution pipe
(13): Pair
(14A) (14B): Gap
(15): Cold storage container
(16): Outer fin
(18): Container body
(19): Outward projecting part
(21) (22): Container component plate
(23) (24): Peripheral strip
(25): Cooling material enclosure
(25a): Left and right side walls
(26) (27): Vertical strip brazing part
(30): Main enclosure
(31): Engagement part
(32) (33): Condensate drainage channel
(34): Convex
(34a): Straight section
(35): Fillet

Claims (11)

A plurality of flat refrigerant flow pipes whose longitudinal direction faces the up-down direction and whose width direction faces the ventilation direction are arranged in parallel and spaced in the thickness direction of the refrigerant flow pipe, and are adjacent to the heat exchange core portion. A gap is formed between the refrigerant flow pipes, and a cool storage material container in which a cool storage material is sealed is disposed in a part and a plurality of gaps of the entire gap and brazed to the refrigerant flow pipe, and the rest Fins are respectively disposed in the gaps and brazed to the refrigerant flow pipe, and the fins are located in at least one of the gaps on both sides of the gap where the cold storage material container is disposed, It consists of two metal container constituent plates in which peripheral strips having a certain width are brazed to each other, excluding the brazed strips on at least one of the container constituent plates The part is outside By bulging, the cold storage material container is provided with a bulging cold storage material enclosure, the cold storage material is placed in the cold storage material enclosure, and the cold storage container is within the range of the ventilation direction of the heat exchange core section. An evaporator with a cold storage function having a container body located at
The leeward side portion and the windward side portion of the container body portion of the cold storage material container are composed of belt-like portions of both container component plates brazed to each other, and have a length of 70% or more of the vertical length of the cold storage material container; A continuous straight vertical belt brazing part having a constant width is provided, and the regenerator material enclosing part has the same width as the straight distance in the ventilation direction between the vertical belt brazing parts and the leeward vertical belt brazing. The main enclosure part having a substantially vertical rectangular shape having a height equal to or greater than the vertical length of the attachment part, the leeward side edge part and the leeward side edge part of the main enclosure part are vertically straight, and the regenerator material enclosure part The dimension in the ventilation direction in the main enclosure part is 85% or more of the dimension in the ventilation direction of the heat exchange core part, and the leeward side end part of the refrigerant flow pipe at the downstream end part in the ventilation direction of the gap is the main enclosure part. A vertical belt-like braze on the leeward side of the leeward side of the cold storage container Located on the leeward side of the leeward side end of the part, and at the upstream end of the gap in the ventilation direction, the leeward end of the refrigerant flow pipe and the windward side end of the windward vertical belt brazing part of the cold storage material container Evaporator with cool storage function at the same position in the ventilation direction. The leeward end of the leeward vertical strip brazing part and the windward end of the windward vertical strip brazing part of the cool storage material container, and the leeward end part and the windward end part of the fin are respectively the same in the ventilation direction. The evaporator with a cool storage function according to claim 1, wherein the linear distance between the leeward side end portion and the leeward side end portion of the fin is equal to the entire width of the heat exchange core portion in the ventilation direction. Ventilation direction of one of the two band-shaped parts brazed to each other of the two container constituting plates constituting the cold-storage material container in the leeward and upper vertical belt-shaped brazing parts of the cold storage material container 2. An engaging portion that protrudes outward in the ventilation direction from the outer end portion in the ventilation direction of the other belt-shaped portion and engages with the outer end portion in the ventilation direction of the other belt-shaped portion is provided at the outer end portion. Or the evaporator with a cool storage function of 2 description. At the downstream end portion in the ventilation direction of the gap where the cool storage material container is disposed, the width in the ventilation direction of the leeward vertical belt-like brazed portion including the engagement portion in the cool storage material container is Zmm, and the leeward including the engagement portion The linear distance in the ventilation direction between the leeward side end of the side vertical belt-like brazed part and the leeward side end of the refrigerant flow pipe is X mm, the leeward side end part of the refrigerant flow pipe, and both sides in the thickness direction of the refrigerant flow pipe The evaporator with a cool storage function according to claim 3, wherein a linear distance in a ventilation direction between the flat portions parallel to each other in the airflow direction is Ymm and satisfies a relationship of Z− (X + Y) <1. 5. The cold storage function according to claim 4, wherein a linear distance X in a ventilation direction between the leeward side end portion of the leeward vertical belt-like brazing portion including the engaging portion and the leeward side end portion of the refrigerant flow pipe is 2 mm or less. Evaporator. A plurality of convex portions having outwardly bulging and flat bulging top walls are formed on both side walls in the direction in which the refrigerant circulation pipes are arranged in the main sealing portion of the cold storage material sealing portion, and the bulging top walls of the convex portions are formed. Are at least partially brazed to the refrigerant flow pipe, and the leeward side end of at least some of the convex portions and the leeward side end of the main enclosure are at the same position in the ventilation direction, and the leeward of the convex portions The evaporator with a cool storage function according to any one of claims 1 to 5, wherein a fillet is formed between the side end portion and the refrigerant flow pipe. A plurality of condensate drainage channels are formed at intervals on the outer surfaces of both side walls in the direction in which the refrigerant circulation pipes are arranged in the main enclosing portion of the cool storage material enclosing portion, and at least a part of the condensed water drainage channels among all the condensate drainage channels One end of the drainage channel opens to the leeward side of the main enclosing portion of the regenerator material enclosing portion, and each condensed water drainage channel is provided on the both side walls of the main enclosing portion and bulges outward and is flat. A leeward side end portion of a convex portion formed between two convex portions having a bulging top wall and having one end opened to the leeward side of the main enclosure portion, and the leeward side of the main enclosure portion The evaporator with a cool storage function according to claim 6, wherein the side edge portion is at the same position in the ventilation direction. The condensate drainage channels are gradually lowered from the upper end toward the lower end and both ends are open, and the upper end of some of the condensate drainage channels is the main part of the regenerator enclosing part. The evaporator with a cool storage function according to claim 7, wherein the evaporator opens to the leeward side of the enclosing portion. A straight portion of a certain length extending in the vertical direction is provided at the leeward side end of the convex portion that forms the condensed water drainage channel that opens to the leeward side of the main enclosure of the regenerator enclosure. When viewed from both sides in the direction in which the flow pipes are arranged, the straight portion and the leeward side edge of the main enclosing portion are located on the same straight line, and the leeward side end of the convex portion and the refrigerant flow tube The evaporator with a cool storage function according to claim 8, wherein a fillet is formed therebetween. A cold storage material enclosing portion is provided with an outwardly extending portion that extends to the outside of the refrigerant flow pipe in the ventilation direction and continues to only a part of the total length in the vertical direction at the upper part of the leeward side edge portion of the container body portion of the cold storage material container. Is provided straddling the container main body part and the outward projecting part, and the vertical length of the outward projecting part is shorter than the vertical length of the cool storage material container. Evaporator with cool storage function described in 1. A pipe assembly composed of a plurality of flat refrigerant flow pipes whose longitudinal direction faces the up-down direction and whose width direction faces the ventilation direction and is spaced apart in the ventilation direction is spaced apart in the thickness direction of the refrigerant flow pipe. The evaporator with a cool storage function according to claim 1, wherein a plurality of the gaps are arranged and a gap is formed between adjacent pipe sets.

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