JP2013216131A - Cold storage heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase a capacity of a container 5 of a cold storage material without increasing a body size of a heat exchanger.SOLUTION: A cold storage heat exchanger includes: a plurality of flat refrigerant pipes 3 (3L, 3R) arranged in parallel with a prescribed interval with flat sections facing each other; a fin 4 disposed in a gap between the adjoining flat sections of the refrigerant pipes which contact with air flowing in a gap; and a cold storage container 5 disposed in place of the fin in the gap between a part of adjoining flat refrigerant pipes. The cold storage material container 5 has an extension 24 extended to a rear side of a flowing direction of the air longer than the refrigerant 3 and the fin 4. The extension 24 includes an expansion section 25 which expands in a parallel arrangement section of the refrigerant pipes, and the expansion section 25 is located at the back side of the refrigerant pipe.

Description

  The present invention relates to a cold storage heat exchanger that can be used as an evaporator (evaporator) in a refrigeration cycle such as a car air conditioner and can store and cool by a cold storage material.

  Generally, a cold storage heat exchanger is arranged in a gap between a plurality of flat refrigerant tubes arranged in parallel at a predetermined interval with the flat portions facing each other, and the flat portions of adjacent refrigerant tubes, and flows through the gaps. It is comprised including the fin which contacts air, and the cool storage material container which is integrated in the row | line | column of these refrigerant pipes and fins, and the cool storage material is accommodated.

  The cold storage heat exchanger is usually used as an evaporator in a refrigeration cycle such as a car air conditioner. Therefore, the refrigerant supplied via the condenser and the expansion valve by the compressor driven by the engine flows through the refrigerant pipe and evaporates here. And the heat for evaporation is taken from the air which flows through the space | gap between the flat parts of an adjacent refrigerant pipe, and cooling air is cooled. At the same time, the cold storage material in the cold storage material container is stored cold. After that, when the engine stops at an idle stop or the like and the compressor stops, the air is cooled using the cold energy stored in the cold storage material to ensure the cooling capacity.

  In addition, the cold storage heat exchanger (cold storage evaporator) described in Patent Document 1 unites a flat refrigerant pipe and a flat cold storage material container with each other by flat portions, and a plurality of units face each other with the flat portions facing each other. Are arranged in parallel at a predetermined interval. And the fin which contacts the air which flows through this space | gap is arrange | positioned in the space | gap between the flat parts of an adjacent unit. The cool storage material container and the fin are formed to extend rearward in the air flow direction from the refrigerant pipe, and a volume increasing portion located on the rear side of the refrigerant pipe is provided in the extension part of the cool storage material container. Yes.

JP 2010-203748 A

By the way, in the cold storage heat exchanger, it is required to increase the amount of the cold storage material and increase the cold storage capacity without deteriorating the original heat exchange capacity, thereby improving the cooling performance (cooling possible time). Is done.
For this reason, in the cool storage heat exchanger of patent document 1, the cool storage material container is extended and formed, and the volume increase part is provided in the extension part.

However, in the regenerator heat exchanger described in Patent Document 1, the heat transfer fins are also formed in correspondence with the extension formation of the regenerator container, so that the physique of the heat exchanger increases, and the overall weight increases and the vehicle-mounted There was a problem of incurring layout restrictions.
In addition, in the system in which the refrigerant pipe and the cold storage material container are unitized, the number of the cold storage material containers is the same as the number of the refrigerant pipes, so that the cooling performance is improved, but the original heat exchange capacity is reduced, and these adjustments are easy. is not.

  In view of such conventional problems, the present invention can increase the capacity of the regenerator container without increasing the physique of the heat exchanger main body, and the regenerator heat having a high degree of freedom in incorporating the regenerator container. It is an object to provide an exchanger.

  The regenerative heat exchanger according to the present invention is arranged in a space between a plurality of flat refrigerant tubes arranged in parallel at a predetermined interval with the flat portions facing each other, and the flat portions of adjacent refrigerant tubes. A fin that comes into contact with flowing air, and a cold storage material container that is arranged in place of the fin in a gap between flat portions of some adjacent refrigerant pipes and that stores the cold storage material.

And the said cool storage material container has the extension part extended from the said refrigerant | coolant pipe | tube and the said fin at least one side among the flow direction rear side or the front side of the said air.
The extension portion has a bulging portion that bulges in the direction in which the refrigerant tubes are juxtaposed, and the bulging portion is located on the rear side or the front side of the refrigerant tube.

  According to the present invention, the lengths of the refrigerant tubes and the fins in the front-rear direction are substantially the same, and only the regenerator material container is extended in the front-rear direction, without increasing the size of the heat exchanger determined by the refrigerant tubes and fins. The capacity of the cold storage material container can be increased, the cold storage capacity of the cold storage material can be increased, and the cooling performance can be improved.

In addition, even if layout restrictions are caused by the extension of the cool storage material container, since only the cool storage material container is extended, it can be handled by changing the shape of only the cool storage material container, and the degree of freedom is high.
Moreover, since it is the structure which replaces with some fins and arrange | positions a cool storage material container, arrangement | positioning (number, position) of a cool storage material container is arbitrary, and adjustment of heat exchange capability and cooling performance is comparatively easy It is.

The whole perspective view of the cool storage heat exchanger which shows a 1st embodiment of the present invention. Schematic perspective view showing the flow of refrigerant in the cold storage heat exchanger Cross section of the main part of a regenerative heat exchanger Cross section of the principal part of the cool storage heat exchanger which shows 2nd Embodiment Whole perspective view of the cool storage heat exchanger which shows 3rd Embodiment The figure which shows the layout in 3rd Embodiment

Hereinafter, embodiments of the present invention will be described in detail.
1 is an overall perspective view of a cold storage heat exchanger (cold storage evaporator) showing a first embodiment of the present invention, FIG. 2 is a schematic perspective view showing the flow of refrigerant in the cold storage heat exchanger, and FIG. 3 is a cold storage heat exchanger. It is a cross-sectional view of the principal part. The upstream side in the air flow direction with respect to the heat exchanger is referred to as the front side, and the downstream side is referred to as the rear side. Accordingly, FIG. 1 is a view of the heat exchanger as viewed obliquely from the rear side.

  The regenerative heat exchanger of this embodiment includes an upper header tank 1, a lower header tank 2, a plurality of flat refrigerant tubes 3 communicating with the upper header tank 1 and the lower header tank 2, and adjacent refrigerant tubes. 3, the fin 4 arrange | positioned in the space | gap between 3 and 3, the cool storage material container 5 arrange | positioned instead of the fin 4 in a part of space | gap, and the side plates 6 of both sides are comprised.

  The upper header tank 1 extends in the horizontal direction, and is divided into two tanks 1A and 1B in the front-rear direction orthogonal to the extending direction. Here, a refrigerant inlet 7 is formed at one end of the rear tank 1B, and a refrigerant outlet 8 is formed at one end of the front tank 1A adjacent thereto.

  The lower header tank 2 extends in the horizontal direction below the upper header tank 1 in the same manner as the upper header tank 1, and is divided into two tanks 2A and 2B in the front-rear direction orthogonal to the extending direction. .

  The refrigerant pipe 3 has a flat shape, and is arranged in parallel at a predetermined interval with the flat portions facing each other. The refrigerant pipes 3 are here arranged in two front and rear rows, the front first row communicates the upper tank 1A and the lower tank 2A, and the rear second row is the upper tank 1B and the lower tank. Communicate with 2B. In addition, a gap is formed between the flat portions of the refrigerant pipes 3 and 3 adjacent to each other in the juxtaposed direction so as to allow air to exchange heat with the refrigerant in the refrigerant pipes 3 and 3. The refrigerant pipe 3 (3L, 3R) is an extruded product having a cross section as shown in FIG.

  The fins 4 are corrugated fins, and are arranged for improving heat exchange efficiency between the gaps, that is, between the flat portions of the adjacent refrigerant pipes 3 and 3. As shown in FIG. 3, a louver (armor window) 4a is formed on the horizontal plate surface of the fin 4 by cutting and raising.

  The cool storage material container 5 is a flat container filled with a cool storage material, and is disposed in the space between the flat portions of some adjacent refrigerant pipes 3 and 3 instead of the fins 4. For example, for every four gaps, fins 4 are arranged in three of them, and the cold storage material container 5 is arranged in the remaining one.

  In the present embodiment, the refrigerant pipe 3 is divided into a front row and a rear row, the front row is further divided into three groups, and the rear row is further divided into three groups. Therefore, in the overall heat exchanger, as shown in the schematic diagram of FIG. 2, the rear first to third passes (P1 to P3) and the front fourth to sixth passes (P4 to P6). Divided.

In order to realize such first to sixth paths (P1 to P6), the upper header tank 1 (1A, 1B) and the lower header tank 2 (2A, 2B) are partitioned as follows.
Referring to FIG. 2, tanks 1 </ b> A and 1 </ b> B are separated from each other by a partition 11 and are not in communication. Each tank 1A, 1B is provided with a partition 12 near one end in the longitudinal direction.
The tanks 2 </ b> A and 2 </ b> B are separated from each other by a partition 13, but communicate with each other through a communication portion 14 on the other end side. Each tank 2A, 2B is provided with a partition 15 near the other end in the longitudinal direction.

  In such a 6-pass system, the refrigerant is supplied by an engine-driven compressor via a condenser and an expansion valve, flows into the upper tank 1B on the rear side from the refrigerant inlet 7, and enters the first pass (P1). The refrigerant pipe 3 flows downward and reaches the lower tank 2B. Then, the refrigerant pipe 3 flows in the second pass (P2) from the middle portion in the longitudinal direction of the lower tank 2B and reaches the upper tank 1B. Then, the refrigerant flows through the third group (P3) of refrigerant pipes 3 from the other end side in the longitudinal direction of the upper tank 1B and reaches the lower tank 2B. Then, the lower tank 2B reaches the front lower tank 2A via the communication portion 14.

  And it flows upward through the refrigerant pipe 3 group of the 4th pass (P4) from the longitudinal direction other end part side of front lower tank 2A, and reaches upper tank 1A. Then, the refrigerant pipe 3 flows in the fifth pass (P5) from the middle in the longitudinal direction of the upper tank 1A and reaches the lower tank 2A. Then, the sixth pass (P6) flows upward from one end side in the longitudinal direction of the lower tank 2A to reach the upper tank 1A. Then, it flows out from the refrigerant outlet 8. Note that although the 6-pass method has been described here, the present invention is not limited to this.

  Here, when the refrigerant flows through the refrigerant pipe 3, the air passing through the gap is cooled via the fins 4. At this time, cold storage is performed in the cold storage material in the cold storage material container 5 disposed between the flat portions of some of the adjacent refrigerant tubes 3 and 3. Thereafter, when the engine is stopped due to an idle stop or the like and the compressor is stopped, the air is cooled by using the cold energy stored in the cool storage material in the cool storage material container 5 to ensure the cooling capacity.

  Next, the detailed structure of the cool storage material container 5 disposed between some adjacent refrigerant pipes 3 and 3 will be mainly described with reference to FIG. Hereinafter, of the adjacent refrigerant tubes 3 and 3 where the cool storage material container 5 is disposed, one refrigerant tube 3 is referred to as “3L” and the other refrigerant tube 3 is referred to as “3R”.

  The cool storage material container 5 of the present embodiment includes a first side plate 21 on the side of one refrigerant pipe 3L and a second side plate 22 on the side of the other refrigerant pipe 3R. Each of the first side plate 21 and the second side plate 22 has a frame-like flange portion at the outer edge portion, and the flange portions are brazed and joined together, so that the cold storage material is provided between the first side plate 21 and the second side plate 22. A storage space is formed. In addition, the inlet part (not shown) of the cool storage material which can be closed is provided in a part of the 1st side plate 21 and / or the 2nd side plate 22. FIG.

The first side plate 21 has a flat surface 21a and is brazed to the refrigerant pipe 3L on the flat surface 21a.
The second side plate 22 has a plurality of frustoconical projections 22b protruding outward from the flat surface 22a, and is brazed to the refrigerant pipe 3R at the top wall of the projections 22b. The plurality of convex portions 22b are independent from each other. Moreover, although each convex part 22b was shown in the truncated cone shape in the figure, it is not restricted to this. However, it is desirable that the top wall of the protrusion 22b be flat for brazing.
Here, an air passage 23 is formed between the flat surface 22a of the second side plate 22 and the refrigerant pipe 3R by the height of the convex portion 22b.

  The cool storage material container 5 (first and second side plates 21, 22) of the present embodiment has an extended portion 24 that extends to the rear side (leeward side) in the air flow direction from the refrigerant pipe 3 and the fins 4. . Therefore, the space for storing the regenerator material is increased by the extension 24.

  The extension 24 has a bulging portion 25 that bulges in the direction in which the refrigerant pipes 3 are juxtaposed. More specifically, the extended portion 24 of the first side plate 21 is expanded in the direction in which the refrigerant pipes 3 are arranged to form the expanded portion 25. Therefore, the cold storage material accommodation space is further increased by the bulging portion 25.

The bulging portion 25 is positioned on the rear side of the refrigerant pipe 3L. In other words, the bulging portion 25 does not protrude beyond the refrigerant pipe 3L to the rear side of the fin 4 to prevent air flow resistance.
Further, the bulging portion is not formed in the extension portion 24 of the second side plate 22. This prevents the air passage 23 from bulging out and prevents air flow resistance.

  According to this embodiment, the cool storage material container 5 has the extension part 24 extended to the rear side in the air flow direction from the refrigerant pipe 3 and the fin 4, and the extension part 24 includes the refrigerant pipe 3. Swelled in the juxtaposed direction to form the bulging portion 25 located on the rear side of the refrigerant pipe 3, thereby increasing the capacity of the cool storage material container 5, increasing the cool storage capacity of the cool storage material, and allowing it to cool. Can be improved. In addition, since the amount of the regenerator material enclosed per one regenerator material container 5 increases, it is possible to reduce the number of the regenerator material containers 5 in the entire heat exchanger. It is also possible to improve the heat exchange efficiency.

  On the other hand, the lengths of the refrigerant tubes 3 and the fins 4 are made substantially the same, and only the cool storage material container 5 is extended in the front-rear direction, so that the size of the heat exchanger determined by the refrigerant tubes 3 and the fins 4 is increased. Can be implemented.

  In addition, even if layout restrictions are caused by the extension of the cold storage material container 5, only the cold storage material container 5 is extended, so that it is possible to cope with the shape change of only the cold storage material container 5, and the degree of freedom is high.

  Moreover, since it is the structure which replaces with some fins 4 and the cool storage material container 5 is arrange | positioned, arrangement | positioning (number, position) of the cool storage material container 5 can be set arbitrarily, and adjustment of heat exchange capability and cool-down performance Is also relatively easy.

  Further, according to the present embodiment, the regenerator container 5 is in contact with the one refrigerant tube 3L on the surface on the one refrigerant tube 3L side, and is connected to the other refrigerant tube 3R on the surface on the other refrigerant tube 3R side. It is comprised so that the air path 23 may be formed between, and the bulging part 25 is set as the structure located in the back side of said one refrigerant pipe 3L which the cool storage material container 5 contacts, and the cool storage material container 5 is one side Heat exchange with the refrigerant can be performed on the surface, and heat exchange with air can be performed on the other surface, and the bulging portion 25 can be prevented from becoming air resistance.

  In addition, according to the present embodiment, the regenerator container 5 is provided on the other refrigerant tube 3R side, which forms a regenerator storage space between the first side plate 21 on the one refrigerant tube 3L side and the first side plate 21. The first side plate 21 has a flat surface 21a, and is brazed to the one refrigerant pipe 3L at the flat surface 21a. The second side plate 22 Has a plurality of convex portions 22b protruding outward from the flat surface 22a, and is brazed to the other refrigerant pipe 3R at the top wall of the convex portion 22b, and the flat surface 22a of the second side plate 22 By adopting a configuration in which the air passage 23 is formed between the other refrigerant pipe 3R, the following effects can be obtained.

(1) Of the first side plate 21 and the second side plate 22 of both the cold storage material containers 5, one of the first side plates 21 is brazed to the refrigerant pipe 3L on the flat surface 21a, so that the contact area increases. Heat transfer efficiency can be improved. Compared with the method of contacting with the convex portion, the volume of the cool storage material container 5 can be secured, the amount of the cool storage material enclosed can be increased, the cool storage capacity can be increased, and the cooling performance can be improved.
(2) Of the first side plate 21 and the second side plate 22 of both of the cold storage material containers 5, one of the second side plates 22 is brazed and joined to the refrigerant pipe 3R at the protruding portion 22b protruding outward. The air passage 23 can be secured by the height of the convex portion 22b, and the cooling performance can be improved.
(3) The air passage 23 is only on one side of the regenerator container 5, but the passage width (height of the convex portion 22 b) is increased by an amount corresponding to only one side, and the air is directly cooled to air. Performance and reduction of ventilation resistance can be secured. Moreover, by enlarging, it can prevent that dew condensation clogs and can ensure drainage performance.

  Moreover, according to this embodiment, since the said bulging part 25 was formed only in the one 1st side plate 22, it can make a process comparatively easy.

In FIG. 3, the gap (X part) between the bulging part 25 of the regenerator container 5 and the refrigerant pipe 3L is made relatively large so that condensed water is discharged without accumulating, or the gap is made large. It is desirable to eliminate it.
Moreover, you may make it aim at the intensity | strength improvement of a container by accommodating and fixing an inner fin (corrugated fin) in the cool storage material container 5, ie, between the 1st side plate 21 and the 2nd side plate 22. FIG.

Next, a second embodiment of the present invention will be described.
FIG. 4 is a cross-sectional view of a main part of a regenerative heat exchanger showing a second embodiment of the present invention.

  The cool storage material container 5 includes first to fourth side plates 31, 32, 33, 34 arranged in order from one refrigerant tube 3 L side to the other refrigerant tube 3 R side, and the first side plate 31 and the second side plate 32 A cold storage material accommodation space is formed between the third side plate 33 and the fourth side plate 34.

  That is, the first side plate 31 and the second side plate 32 each have a frame-like flange portion at the outer edge portion, and the flange portions are brazed and joined together, so that the first side plate 31 and the second side plate 32 are interposed. A cold storage material accommodation space is formed. Further, the third side plate 33 and the fourth side plate 34 each have a frame-like flange portion at the outer edge portion, and the flange portions are brazed and joined together, so that the third side plate 33 and the fourth side plate 34 are interposed. A cold storage material accommodation space is formed.

The first side plate 31 has a flat surface 31a, and is joined to the refrigerant pipe 3L by brazing on the flat surface 31a.
The second side plate 32 has a plurality of frustoconical convex portions 32b protruding outward from the flat surface 32a.

The third side plate 33 is configured symmetrically with the second side plate 32 and has a plurality of frustoconical convex portions 33b protruding outward from the flat surface 33a.
The fourth side plate 34 is configured symmetrically with the first side plate 31 and has a flat surface 34a. The fourth side plate 34 is brazed and joined to the refrigerant pipe 3R at the flat surface 34a.

  Here, the convex part 32b of the 2nd side board 32 and the convex part 33b of the 3rd side board 33 are provided in the position corresponding to each other, and the top walls are brazed and joined. Therefore, an air passage 35 is formed between the flat surface 32 a of the second side plate 32 and the flat surface 33 a of the third side plate 33.

  As can be seen from the above description, in the present embodiment, as the regenerator material container 5, the first container including the first side plate 31 and the second side plate 32, the third side plate 33 and the fourth side plate 34 are included. And an air passage 35 is formed between the first and second containers.

  In the present embodiment, a concave portion 31 c that protrudes inward from the flat surface 31 a of the first side plate 31 is provided, and the bottom wall of the concave portion 31 c is brazed to the flat surface 32 a of the second side plate 32 to join the second side plate 32. A concave portion 32 c protruding inward from the flat surface 32 a is provided, and the bottom wall of the concave portion 32 c is brazed and joined to the flat surface 31 a of the first side plate 31. As a result, the strength of the first container can be increased.

  Similarly, a recess 33c that protrudes inward from the flat surface 33a of the third side plate 33 is provided, and the bottom wall of the recess 33c is brazed to the flat surface 34a of the fourth side plate 34, so that the flat surface 34a of the fourth side plate 34 is joined. A recess 34 c that protrudes inward from the inner side is provided, and the bottom wall of the recess 34 c is brazed to the flat surface 33 a of the third side plate 33. As a result, the strength of the second container can be increased.

  Here, the first container made up of the first side plate 31 and the second side plate 32 and the second container made up of the third side plate 33 and the fourth side plate 34 are more air-conditioned than the refrigerant pipe 3 and the fins 4. The extension part 36 extended to the rear side (leeward side) of the flow direction. Therefore, the space for storing the regenerator material is increased by the extension portion 36.

Further, the extension 36 has a bulging portion 37 that bulges in the direction in which the refrigerant tubes 3 are juxtaposed.
More specifically, the extended portion 36 of the first side plate 31 constituting the first container is expanded in the direction in which the refrigerant pipes 3 are juxtaposed to form the expanded portion 37. The bulging portion 37 is positioned on the rear side of the refrigerant pipe 3L. In other words, the bulging portion 37 does not protrude beyond the refrigerant pipe 3L to the rear side of the fin 4 to prevent air flow resistance. In addition, the bulging part is not formed in the extension part 36 of the second side plate 32. This prevents the air passage 35 from bulging out and prevents air flow resistance.

  Further, the extended portion 36 of the fourth side plate 34 constituting the second container is expanded in the direction in which the refrigerant pipes 3 are arranged to form the expanded portion 37. The bulging portion 37 is positioned on the rear side of the refrigerant pipe 3R. In other words, the bulging portion 37 does not protrude beyond the refrigerant pipe 3R to the rear side of the fin 4 to prevent air flow resistance. In addition, the bulging part is not formed in the extension part 36 of the third side plate 33. This prevents the air passage 35 from bulging out and prevents air flow resistance.

  By comprising in this way, the effect similar to 1st Embodiment (FIG. 3) can be acquired also in the 4 sheets structure of the 1st side board 31-the 4th side board 34. FIG.

Next, a third embodiment of the present invention will be described.
FIG. 5 is an overall perspective view of a regenerative heat exchanger showing a third embodiment of the present invention. The same elements as those of the first embodiment (FIG. 1) are denoted by the same reference numerals, and different elements will be described.

In the present embodiment, a notch portion 40 is provided at an intermediate portion in the extending direction of the refrigerant pipe 3 with respect to the extension portion 24 with the bulging portion 25 of the cold storage material container 5. That is, with respect to the extension portion 24, the extension amount at each position in the extending direction of the refrigerant pipe 3 is made different, and the extension amount of the intermediate portion is made small.
The reason for this will be described below.

The cold storage heat exchanger is used as an evaporator in an refrigeration cycle of a car air conditioner.
FIG. 6 is a layout diagram of a general car air conditioner.
An air mix door 101 is arranged on the downstream side of the cold storage heat exchanger (cold storage evaporator) 100. The air mix door 101 rotates about a rotation shaft 102 arranged in the horizontal direction, and adjusts the opening ratio between the lower first passage 103 and the upper second passage 104. The first passage 103 guides the air that has passed through the cold storage heat exchanger 100 to the outlet 106 through the heater core 105, and the second passage 104 bypasses the heater core 105 through the air that has passed through the cold storage heat exchanger 100. It is configured to lead to the outlet 106.

  In such a configuration, depending on the layout, the rear extension 24 of the cold storage material container in the cold storage heat exchanger 100 may hinder the operation of the air mix door 101. Therefore, as shown in FIG. 5 or schematically shown in FIG. 6, a cutout portion 40 is provided in the extension portion 24 so as not to interfere with the rotation trajectory of the air mix door 101.

  Here, the cutout portion 40 may be cut out in a circular arc shape as well as in a square shape as shown in the figure. Further, the cold storage material container 5 may be divided into an upper container and a lower container with the notch 40 interposed therebetween. Although an example in which the notch 40 is provided in the extension 24 of the first embodiment (FIG. 3) is shown here, a notch is provided in the extension 36 of the second embodiment (FIG. 4). May be.

  In the above embodiment, the cool storage material container 5 is formed to extend from the refrigerant pipe 3 and the fin 4 to the rear side (leeward side) of the air flow direction, but to be extended to the front side (windward side). Alternatively, an extension may be formed on both the front side and the rear side. However, from the point of storing cold heat of the refrigerant, it is efficient to store cold at the downstream side in the air flow direction, and it can be said that it is desirable to extend at least to the rear side.

  The illustrated embodiments are merely examples of the present invention, and the present invention is not limited to those directly described by the described embodiments, and various improvements and modifications made by those skilled in the art within the scope of the claims. Needless to say, it encompasses changes.

1 (1A, 1B) Upper header tank 2 (2A, 2B) Lower header tank 3 (3L, 3R) Refrigerant pipe 4 Fin 5 Cold storage material container 6 Side plate 11, 12, 13, 15 Partition 14 Communication part 21 1st Side plate 21a Flat surface 22 Second side plate 22a Flat surface 22b Convex portion 23 Air passage 24 Extension portion 25 Swelling portion 31 First side plate 31a Flat surface 31c Recess 32 Second side plate 32a Flat surface 32b Convex portion 32c Concavity 33 Third side plate 33a Flat surface 33b Convex part 33c Concave part 34 Side plate 34a Convex part 34c Concave part 35 Air passage 40 Notch part 100 Regenerative heat exchanger 101 Air mix door 105 Heater core 106 Outlet

Claims (8)

A plurality of flat refrigerant tubes arranged in parallel at a predetermined interval with the flat portions facing each other, fins arranged in a space between the flat portions of adjacent refrigerant tubes and contacting with air flowing through the space; A cold storage heat exchanger comprising a cold storage material container in which a cold storage material is accommodated in place of the fins in a space between flat portions of refrigerant pipes adjacent to each other,
The cold storage material container has an extended portion extended to at least one side of the air flow direction rear side or front side rather than the refrigerant pipe and the fin,
The extension has a bulging portion that bulges in the direction in which the refrigerant pipes are juxtaposed,
The swell part is located on the rear side or the front side of the refrigerant pipe. The cold storage material container is configured to be in contact with the one refrigerant pipe on the surface on one refrigerant pipe side and to form an air passage between the other refrigerant pipe on the surface on the other refrigerant pipe side,
2. The regenerative heat exchanger according to claim 1, wherein the bulging portion is located on a rear side or a front side of the one refrigerant pipe in contact with the regenerator material container. The cold storage material container includes a first side plate on one refrigerant tube side, and a second side plate on the other refrigerant tube side that forms a cold storage material accommodation space between the first side plate,
The first side plate has a flat surface and is brazed to the one refrigerant pipe on the flat surface,
The second side plate has a plurality of convex portions protruding outward from the flat surface, and is brazed and joined to the other refrigerant pipe at the top wall of the convex portion,
The regenerative heat exchanger according to claim 1 or 2, wherein an air passage is formed between the flat surface of the second side plate and the other refrigerant pipe.   The regenerative heat exchanger according to claim 3, wherein the bulging portion is formed on the first side plate. The cold storage material container includes first to fourth side plates arranged in order from one refrigerant tube side to the other refrigerant tube side, between the first side plate and the second side plate, and the third side plate and the fourth side plate. Is configured to form a regenerator storage space between
The first side plate and the fourth side plate each have a flat surface, and are brazed to the refrigerant pipe on the flat surface,
Each of the second side plate and the third side plate has a plurality of convex portions protruding outward from the flat surface, and is brazed and joined to each other by the top walls of the convex portions,
An air passage is formed between the flat surface of the second side plate and the flat surface of the third side plate. The regenerative heat exchanger according to claim 1 or 2.   The regenerative heat exchanger according to claim 5, wherein the bulging portion is formed on the first side plate and the fourth side plate.   The regenerative heat exchanger according to any one of claims 1 to 6, wherein the extension portion has a different extension amount at each position in the extending direction of the refrigerant pipe.   The extension portion is formed to extend to the rear side in the air flow direction, and has a notch portion so as not to interfere with the rotation trajectory of the air mix door disposed on the rear side of the cold storage heat exchanger. The regenerative heat exchanger according to any one of claims 1 to 6, characterized in that: