JP2012102969A - Evaporator with cool storage function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an evaporator with a cool storage function, excelling in both cool storage performance and radiational cooling performance.SOLUTION: The evaporator with the cool storage function includes: a plurality of flat refrigerant flow tubes 13 disposed in a parallel manner at intervals from each other and vertically extending with the width direction oriented to an air-passing direction; a cool storage material container 16 disposed in partial air-passing clearances 15 among all air-passing clearances 15 formed between adjacent refrigerant flow tubes 13; and outer fins 17 disposed in the air-passing clearances 15 on the opposite sides of the cool storage material container 16. In the refrigerant flow tube 13, a plurality of refrigerant flow channels 33 arranged in line in the width direction of the refrigerant flow tube 13 are provided via partitions 34. Representing the thickness of the partition 34 as t mm, the height of the partition 34 as h mm and the tube height which is the dimension of the refrigerant flow tube 13 in the thickness direction as H mm, a relation 0.1≤t≤0.4 and 0.64≤h/H≤0.86 is satisfied.

Description

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

  In this specification and claims, the top and bottom of FIG.

  In recent years, automobiles have been proposed that automatically stop the engine when the vehicle stops, such as when waiting for a signal, for the purpose of environmental protection or improvement in automobile fuel efficiency.

  However, in a normal car air conditioner, when the engine is stopped, the compressor using the engine as a driving source stops, so that there is a problem that the refrigerant is not supplied to the evaporator and the cooling capacity is rapidly reduced.

  Therefore, in order to solve such a problem, the evaporator is provided with a cold storage function, and when the engine stops and the compressor stops, the interior of the vehicle can be cooled using the cold energy stored in the evaporator. It is considered.

  As an evaporator with a cold storage function, the present applicant has previously arranged a plurality of flat refrigerant flow pipes extending in the vertical direction and having the width direction facing the ventilation direction, arranged in parallel at intervals. Ventilation gaps are formed between the matching refrigerant flow pipes, a cool storage material container in which a cool storage material is sealed is arranged in some of the ventilation gaps, and fins are arranged in the remaining ventilation gaps. The regenerator container and the refrigerant distribution pipes arranged on both sides of the regenerator container are brazed, and a plurality of refrigerant flow paths arranged in the width direction of the refrigerant distribution pipe are connected to all the refrigerant distribution pipes through the partitions. The evaporator with the cool storage function provided was proposed (refer patent document 1).

  According to the evaporator with a cool storage function described in Patent Document 1, during normal cooling when the compressor is operating, the cold heat of the coolant flowing in the coolant circulation pipe is transferred from one side of the coolant circulation pipe to the cool storage material in the cool storage material container. When cold energy is stored in the cold storage material and the compressor stops, the cold heat stored in the cold storage material in the cold storage material container passes through the refrigerant distribution pipes arranged on both sides of the cold storage material container to store the cold storage. It is transmitted to the fin arranged in the ventilation gap adjacent to the ventilation gap where the material container is arranged, and is cooled by the air flowing through the ventilation gap from the fin.

  By the way, in the evaporator with a cool storage function of patent document 1, the cool storage performance to the cool storage material in the cool storage material container and the cool storage material container without sacrificing the cooling performance at the time of normal cooling when the compressor is operating. It is required to improve the cooling performance from the inside cold storage material. In order to improve the cold storage performance, cold heat is efficiently transmitted from the refrigerant flowing in the refrigerant flow path of the refrigerant distribution pipe to both sides, and in order to improve the cooling performance, the cold heat of the cold storage material in the cold storage material container is the refrigerant. It is effective to pass through the flow pipe efficiently in the pipe height direction.

  And also in the evaporator with a cool storage function of patent document 1, it is calculated | required to further improve both cool storage performance and cool-down performance.

  The inventor efficiently transmits cold heat to both sides from the refrigerant flowing in the refrigerant flow path of the refrigerant flow pipe during cold storage, and the cold heat of the cold storage material in the cold storage material container increases the pipe height of the refrigerant flow pipe during cooling. In order to efficiently pass in the direction, the thickness of the partition between the adjacent refrigerant flow paths of the refrigerant flow pipe, the height of the partition, and the pipe height of the refrigerant flow pipe are completed, and the present invention is completed. It came to.

JP 2010-149814 A

  In view of the above circumstances, an object of the present invention is to provide an evaporator with a cold storage function that is excellent in both cold storage performance and cooling performance.

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

1) A plurality of flat refrigerant flow pipes that extend in the vertical direction and whose width direction faces the ventilation direction are arranged in parallel with a space between each other, on at least one side of at least one refrigerant flow pipe The regenerator material container in which the regenerator material is sealed is arranged and brought into thermal contact with the refrigerant flow tube, and is aligned in the width direction of the refrigerant flow tube with the refrigerant flow tube in which the regenerator material container is thermally contacted It is an evaporator with a cold storage function in which a plurality of refrigerant flow paths are provided via a partition,
When the thickness of the partition is tmm, the height of the partition is hmm, and the tube height that is the dimension in the thickness direction of the refrigerant flow tube is Hmm, 0.1 ≦ t ≦ 0.4, 0.64 ≦ h / H ≦ An evaporator with a cold storage function that satisfies the relationship of 0.86.

  2) The evaporator with a cold storage function according to the above 1) that satisfies the relationship of 0.07 ≦ (n × t) /W≦0.31, where n is the number of partitions and the width of the refrigerant flow pipe is Wmm.

  3) The evaporator with a cold storage function according to the above 1) or 2), wherein the height H of the refrigerant flow pipe is 12 to 25 mm and the width W of the refrigerant flow pipe is 1.3 to 3.0 mm.

  4) Ventilation gaps are formed between adjacent refrigerant flow pipes, and a cool storage material container in which a cold storage material is sealed is disposed in some of the total ventilation gaps, and the refrigerant flow pipes on both sides are arranged. A plurality of refrigerant flow paths arranged in the width direction of the refrigerant distribution pipe are arranged on the refrigerant distribution pipes arranged on both sides of the cold storage material container through the partition. The evaporator with a cool storage function according to any one of the above 1) to 3) provided.

  5) The cool storage material container is connected to the refrigerant body pipe, and the outwardly projecting part is provided so as to extend outward from the refrigerant circulation pipe while continuing to the leeward side edge of the container main body part. And fins arranged in the ventilation gap adjacent to the ventilation gap where the cool storage material container is arranged are connected to the fin main body portion joined to the refrigerant flow pipe and the leeward side edge portion of the fin main body portion. And an outward projecting portion provided so as to project outward from the refrigerant flow pipe in the ventilation direction, and the outward projecting portion of the fin is in contact with both side surfaces of the outward projecting portion of the cold storage material container. 4) Evaporator with cool storage function.

  6) It is provided with a set of a plurality of flat refrigerant flow pipes that are oriented in the width direction in the ventilation direction and spaced apart in the ventilation direction, and the set forms a right angle with the width direction of the refrigerant flow pipe. With the cold storage function according to the above 4) or 5), which is arranged at intervals in the direction, and the container body of the cold storage material container is joined so as to straddle all the refrigerant flow pipes of the set consisting of a plurality of refrigerant flow pipes Evaporator.

  7) A regenerator container is disposed only on one side of the refrigerant flow pipe and is brought into thermal contact with the refrigerant flow pipe, and the cool storage container is connected to the refrigerant flow pipe, and the lee of the container main body The evaporator with a cold storage function according to any one of the above items 1) to 3), further comprising an outward projecting portion that is connected to the side edge portion and is disposed so as to project outward from the refrigerant circulation pipe in the ventilation direction.

  8) A combination body composed of a refrigerant circulation pipe and a cold storage material container having a container main body joined to the refrigerant circulation pipe is arranged at intervals in a direction perpendicular to the width direction of the refrigerant circulation pipe, and is adjacent to the combination body. A fin body portion in which a gap is defined as a ventilation gap, fins are arranged in the ventilation gap, and one of the two fins arranged on both sides of one combination is joined to the refrigerant flow pipe, and a fin And an outwardly extending portion that is connected to the leeward side edge portion of the main body portion and extends outwardly from the refrigerant flow pipe in the ventilation direction. Similarly, the other fin is connected to the container main body portion of the cold storage material container. A fin body portion that is joined, and an outward projecting portion that is connected to the leeward side edge portion of the fin body portion and that projects outward from the container body portion in the ventilation direction. Square on both sides of the projecting portion, the 7 outward projecting portions on both sides of the fin is in contact with) an evaporator with a cool storage function according.

  9) A plurality of the refrigerant circulation pipes of each combination are arranged at intervals in the ventilation direction, and the container main body portion of the regenerator container of the combination is arranged so as to straddle all the refrigerant circulation pipes of the combination. The evaporator with a cold storage function as described in 8) above, which is joined to the refrigerant flow pipe.

  According to the evaporator with a cold storage function of 1) to 9) above, when the partition thickness is tmm, the partition height is hmm, and the pipe height which is the dimension in the thickness direction of the refrigerant flow pipe is 0.1 mm, Since ≦ t ≦ 0.4 and 0.64 ≦ h / H ≦ 0.86 are satisfied, cold heat is efficiently transmitted from the refrigerant flowing in the refrigerant flow path of the refrigerant flow pipe to both side surfaces during cold storage, At the time of cooling, the cold heat of the cool storage material in the cool storage material container efficiently passes through the refrigerant flow pipe in the pipe height direction, and both the cool storage performance and the cool discharge performance are excellent. Moreover, the cooling performance during normal cooling when the compressor is operating is not sacrificed.

  According to the evaporator with a cold storage function of 2), when the number of partitions is n and the width of the refrigerant flow pipe is Wmm, the relationship of 0.07 ≦ (n × t) /W≦0.31 is satisfied. Therefore, both the cold storage performance and the cooling performance are more excellent.

  According to the evaporator with a cool storage function of 5) above, the cool storage material container is connected to the container main body portion joined to the refrigerant circulation pipe and the leeward side edge of the container main body section, and extends outward from the refrigerant circulation pipe in the ventilation direction. Since it has an outward projecting portion provided to take out, the amount of the regenerator material that can be enclosed in one regenerator material container, compared to the regenerator material container of the evaporator with a regenerator function described in Patent Document 1, It can be increased by the amount of the outward projection. Therefore, even if the amount of cool storage material enclosed in the cool storage material container is increased without changing the dimensions of the heat exchange core, the number of cool storage material containers can be increased or the overall height of the cool storage material container can be increased. There is no need to raise it.

  Furthermore, the fins arranged in the ventilation gap adjacent to the ventilation gap where the cool storage material container is arranged are connected to the fin body part joined to the refrigerant circulation pipe, and the leeward side edge of the fin body part, and from the refrigerant circulation pipe Also has an outwardly extending portion provided so as to protrude outward in the ventilation direction, and since the outwardly extending portion of the fin is in contact with both side surfaces of the outwardly extending portion of the cold storage material container, the compressor When cold energy is stored in the regenerator material in the regenerator container during operation, the regenerator material is cooled by the refrigerant flowing in the refrigerant distribution pipe, and the air flowing through the ventilation gap is lowered in temperature. Therefore, the cool storage material can be efficiently cooled, and the cool storage performance is improved. On the other hand, when the engine stops and the compressor stops, the cold heat of the cool storage material in the container main body of the cool storage material container is transmitted to the air passing through the adjacent ventilation gap via the refrigerant flow pipes on both sides thereof. At the same time, the cold heat of the cool storage material in the outwardly projecting portion of the cool storage material container is transmitted from the both side surfaces of the outwardly projecting portion to the air passing through the ventilation gap via the fins that are in contact with the both side surfaces of the outwardly projecting portion. Therefore, the cooling performance is improved. Since it is transmitted from the outward projecting part to the air passing through the ventilation gap via the fins, the cooling performance is improved.

  According to the evaporator with a cold storage function of 7) above, the cold storage material container is disposed only on one side of the refrigerant flow tube and is brought into thermal contact with the refrigerant flow tube, and the cold storage material container is joined to the refrigerant flow tube. Since it is provided with a container body part and an outwardly extending part that is connected to the leeward side edge part of the container body part and projects outward from the refrigerant circulation pipe in the ventilation direction, the refrigerant circulation pipe and the cold storage material container are provided. The amount of the regenerator material enclosed in the regenerator material container can be increased without increasing the length of the regenerator material or increasing the overall container height, which is the dimension in the thickness direction of the regenerator material container.

  Further, since the outward projecting portion is provided so as to be connected to the leeward side edge portion of the container main body, the container joined to the refrigerant circulation pipe and the refrigerant circulation pipe like the evaporator with a cold storage function of the above 8) Even when the combined body composed of the cool storage material containers having the main body is arranged at intervals in the direction perpendicular to the width direction of the refrigerant flow pipe, and between the adjacent combined bodies is a ventilation gap And the quantity of the cool storage material enclosed with the cool storage material container can be increased, without changing the dimension of a heat exchange core part.

  According to the evaporator with a cold storage function of 8) above, the combination of the refrigerant storage pipe and the cold storage material container having the container main body joined to the refrigerant distribution pipe is spaced in a direction perpendicular to the width direction of the refrigerant distribution pipe. Between the adjacent combination bodies, a ventilation gap is formed between the adjacent combination bodies, fins are arranged in the ventilation gap, and one of the two fins arranged on both sides of one combination body is a refrigerant flow pipe. And a fin body portion joined to the leeward side edge portion of the fin body portion and an outward projecting portion provided so as to project outward from the refrigerant flow pipe in the ventilation direction. Is connected to the container main body portion of the cold storage material container and the leeward side edge portion of the fin main body portion, and is provided so as to project outward from the container main body portion in the ventilation direction. Because the outward projecting parts of the fins on both sides are in contact with both sides of the outer projecting part of the cool storage material container, when the engine stops and the compressor stops, the cool storage material The cold heat of the regenerator material in the outwardly projecting part of the container will be transmitted to the air passing through the ventilation gap through the fins that are in contact with the both side surfaces of the outwardly projecting part from both side surfaces of the outwardly projecting part, Cooling performance is improved.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. It is an AA line expanded sectional view of FIG. FIG. 2 is an enlarged cross-sectional view showing a refrigerant flow pipe of the evaporator with a cold storage function in FIG. 1. It is a disassembled perspective view which shows the cool storage material container of the evaporator with a cool storage function of FIG. It is a graph which shows the result of the computer simulation calculation performed in order to determine the thickness of the partition of a refrigerant | coolant distribution pipe. It is a graph which shows the result of the computer simulation calculation different from FIG. 5 performed in order to determine the thickness of the partition of a refrigerant | coolant distribution pipe. It is a graph which shows the result of the computer simulation calculation performed in order to determine the ratio of the height of the partition with respect to the pipe height which is the dimension of the thickness direction of a refrigerant | coolant flow pipe. It is a graph which shows the result of the computer simulation calculation different from FIG. 7 performed in order to determine the ratio of the height of the partition with respect to the pipe height which is the dimension of the thickness direction of a refrigerant | coolant flow pipe. It is sectional drawing equivalent to FIG. 2 which shows other embodiment of the evaporator with a cool storage function of this invention.

  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 and 2) is the front, and the opposite side is the rear. Further, the left and right when viewing the rear from the front, that is, the left and right in FIG.

  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 (3) extending in the horizontal direction and spaced apart in the vertical direction, and both headers. And a heat exchange core part (4) provided between the tanks (2) and (3).

  The first header tank (2) is integrated with the refrigerant inlet header (5) located on the front side (downstream in the ventilation direction) and the refrigerant inlet header (5) located on the rear side (upstream in the ventilation direction). And a refrigerant outlet header portion (6). A refrigerant inlet (7) is provided at the right end of the refrigerant inlet header (5), and a refrigerant outlet (8) is provided at the right end of the refrigerant outlet header (6). The second header tank (3) includes a first intermediate header portion (9) located on the front side and a second intermediate header portion (11) located on the rear side and integrated with the first intermediate header portion (9). And. The first intermediate header portion (9) and the second intermediate header portion (11) of the second header tank (3) are joined across the right end portions of the intermediate header portions (9) and (11), and The inside is communicated via a communication member (12) that forms a passage.

  As shown in FIG. 1 and FIG. 2, the heat exchange core (4) has a plurality of extruded aluminum flat refrigerant flow pipes that extend in the vertical direction and whose width direction faces the ventilation direction (front-rear direction). 13) are arranged in parallel at intervals in the left-right direction. That is, a plurality of sets (14) composed of a plurality of refrigerant distribution pipes (13) arranged at intervals in the front-rear direction, here two refrigerant distribution pipes (13), are arranged at intervals in the left-right direction. A ventilation gap (15) is formed between adjacent ones of the group (14) consisting of (13). The upper end of the front refrigerant flow pipe (13) is connected to the refrigerant inlet header (5), and the lower end is connected to the first intermediate header (9). The upper end of the rear refrigerant flow pipe (13) is connected to the refrigerant outlet header (6), and the lower end is connected to the second intermediate header (11).

  The refrigerant flow pipe (13) is provided with a plurality of refrigerant flow paths (33) arranged in the width direction (front-rear direction) of the refrigerant flow pipe (13) via a partition (34). Here, as shown in FIG. 3, when the thickness of the partition (34) is tmm, the height of the partition is hmm, and the pipe height, which is the dimension in the thickness direction of the refrigerant flow pipe (13), is Hmm. The relations 1 ≦ t ≦ 0.4 and 0.64 ≦ h / H ≦ 0.86 are satisfied. Further, when the number of partitions (34) of the refrigerant flow pipe (13) is n and the width of the refrigerant flow pipe (13) is Wmm, the relationship of 0.07 ≦ (n × t) /W≦0.31 is established. It is preferable to satisfy. Note that the pipe height H of the refrigerant flow pipe (13) is preferably 12 to 25 mm, and the width W of the refrigerant flow pipe (13) is preferably 1.3 to 3.0 mm.

  An aluminum regenerator container (16) in which a regenerator material (not shown) is sealed in a part of a plurality of air gaps (15) and not adjacent to each other among all the air gaps (15). Further, it is arranged so as to straddle both the front and rear refrigerant flow pipes (13). Further, in the remaining ventilation gap (15), corrugated outer fins (17) made of an aluminum brazing sheet having a brazing filler metal layer on both sides are disposed so as to straddle both the front and rear refrigerant flow pipes (13). The front and rear refrigerant flow pipes (13) constituting the pair (14) on both the left and right sides forming (15) are brazed. That is, the outer fins (17) are arranged in the ventilation gaps (15) on both sides of the ventilation gap (15) in which the cool storage material container (16) is arranged. In addition, outer fins (17) made of an aluminum brazing sheet having a brazing filler metal layer on both sides are also arranged outside the set (14) of the refrigerant flow pipes (13) at the left and right ends, and the front and rear refrigerant flow pipes (13) are arranged. An aluminum side plate (18) is disposed outside the outer fins (17) at both the left and right ends and brazed to the outer fins (17).

  The cool storage material container (16) is located behind the front edge of the front refrigerant flow pipe (13) and is brazed to the two refrigerant flow pipes (13) before and after each pair (14) ( 21) and the outside of the container body (21) connected to the front side edge (leeward side edge) and extending forward (outward in the ventilation direction) from the front side edge of the front refrigerant flow pipe (13) And a projecting portion (22). The thickness direction (left-right direction) dimension of the container main-body part (21) of the cool storage material container (16) is equal to the whole. The outwardly projecting portion (22) of the cold storage material container (16) has the vertical dimension equal to the vertical dimension of the container main body (21) and the horizontal dimension of the container main body (21) in the horizontal direction. And is bulged outwardly in the left-right direction with respect to the container main body (21). The lateral dimension of the outward projecting part (22) is the height obtained by adding the lateral dimension of the container body (21) of the cold storage container (16) to the pipe height H of the refrigerant flow pipe (13). Are equal. As the cool storage material filled in the cool storage material container (16), for example, a water-based, paraffin-based or the like whose freezing point is adjusted to about 3 to 10 ° C is used. Further, the amount of the cold storage material filled in the cold storage material container (16) is preferably set to an amount that fills the entire cold storage material container (16) up to the upper end.

  As shown in FIG. 4, the cold storage material container (16) is formed by pressing an aluminum brazing sheet having a brazing material layer on both sides, and the peripheral portions are brazed to each other. It consists of substantially vertical rectangular aluminum plates (24) and (25). A portion of the right aluminum plate (24) constituting the cool storage material container (16) forming the container main body portion (21), that is, most of the portion excluding the front side portion, is bulged to the right. (26) is provided, and the portion that also forms the outwardly projecting portion (22), that is, the front side portion, is connected to the front side of the first bulging portion (26) and bulges to the right, and the first bulging portion A second bulge portion (27) having a bulge height higher than that of the portion (26) is provided over the entire length in the vertical direction. In addition, lattice-shaped grooves (28) are formed in the portion where the refrigerant flow pipe (13) is brazed on the outer surface of the portion of the right aluminum plate (24) that forms the container body (21). The left aluminum plate (25) constituting the cold storage material container (16) is the right aluminum plate (24) reversed in the left-right direction, and the same parts are denoted by the same reference numerals.

  The two aluminum plates (24) and (25) are brazed in combination so that the openings of the first and second bulge portions (26) and (27) face each other, thereby the cold storage material container (16 ) Is formed. Here, the container body part (21) is formed by the first bulge part (26) of both aluminum plates (24) and (25), and the outwardly projecting part (22) is formed by the second bulge part (27). Has been.

  Inside the cool storage material container (16), aluminum inner fins (29) extending from the rear end of the container main body (21) to the front end of the outwardly projecting portion (22) are arranged over substantially the entire vertical direction. ing. The inner fin (29) has a corrugated shape including a wave crest extending in the front-rear direction, a wave bottom extending in the front-rear direction, and a connecting portion connecting the wave crest and the wave bottom. The fins of the inner fins (29) have the same height, and are brazed to the inner surfaces of the left and right side walls of the container main body (21) of the cold storage material container (16).

  The outer fin (17) has a corrugated shape including a wave crest extending in the front-rear direction, a wave bottom extending in the front-rear direction, and a connecting portion connecting the wave crest and the wave bottom. The outer fin (17) is located behind the front edge of the front refrigerant flow pipe (13) and is finned to the refrigerant flow pipe (13) before and after each set (14) by the fin main body (31) And an outwardly projecting portion (32) provided so as to extend forward of the front side edge of the rear refrigerant flow pipe (13) while continuing to the front side edge of the fin body portion (31). Then, the outwardly projecting portion (32) of the outer fin (17) disposed in the ventilation gap (15) on both sides of the ventilation gap (15) where the cold storage material container (16) is arranged, the cold storage material container (16) Are brazed to the left and right side surfaces of the outwardly projecting portion (22). An aluminum spacer (36) is disposed between the outwardly projecting portions (32) of the adjacent outer fins (17), and is brazed to the outwardly projecting portion (32).

  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 stops. 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 has an evaporator with a cold storage function ( The refrigerant enters the refrigerant inlet header part (5) of 1) and flows into the first intermediate header part (9) through the front all refrigerant circulation pipe (13). The refrigerant that has entered the first intermediate header portion (9) passes through the communication member (12), enters the second intermediate header portion (11), and then passes through the rear refrigerant flow pipe (13). It flows into the outlet header (6) and flows out from the refrigerant outlet (8). While the refrigerant flows in the refrigerant flow pipe (13), heat exchange is performed with the air passing through the ventilation gap (15), and the refrigerant flows out in a gas phase.

  At this time, the cool storage material in the container main body (21) of the cool storage material container (16) is cooled by the refrigerant flowing in the refrigerant flow pipe (13), and the cooled cool storage material in the container main body (21) Is transferred to the cold storage material in the outwardly projecting portion (22) of the cold storage material container (16) through the inner fin (29), and is further cooled by the air cooled by the refrigerant through the ventilation gap (15). The cold storage material in the outward projecting portion (22) of the cold storage material container (16) is cooled, and as a result, cold heat is stored in the entire cold storage material in the cold storage material container (16).

  When the compressor is stopped, the cold heat of the cold storage material in the container main body portion (21) and the outward projecting portion (22) of the cold storage material container (16) is transferred to the container main body portion via the inner fin (29). (21) and the left and right side walls of the outward projection (22). The cold heat transmitted to the left and right side walls of the container body (21) passes through the refrigerant flow pipe (13), and the fin main body (17) of the outer fin (17) brazed to the refrigerant flow pipe (13) ( It is transmitted to the air passing through the ventilation gap (15) adjacent to the ventilation gap (15) where the cool storage material container (16) is arranged via 31). The cold heat transmitted to the left and right side walls of the outward projecting part (22) passes through the outer projecting part (32) of the outer fin (17) brazed to the left and right side surfaces of the outer projecting part (22). It is transmitted to the air passing through the ventilation gap (15). 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.

  When the thickness of the partition (34) of the refrigerant flow pipe (13) is tmm, it is assumed that 0.1 ≦ t ≦ 0.4 is satisfied. This is because the results shown in FIG. In this computer simulation calculation, the width W of the refrigerant flow pipe (13) is 16.95 mm, the pipe height is H = 1.4 mm, the number of partitions (34) is n = 13, and the thickness t of the partition (34) is changed. I went.

  The vertical axis on the left side of the graph shown in FIG. 5 has passed through the heat exchange core section (4) when the compressor is stopped and the cool storage material in the cool storage material container (16) is cooled. Indicates the average temperature of the wind. The vertical axis on the left side of the graph shown in FIG. 6 indicates the ventilation gap (15) in which the cool storage material container (16) is disposed during cold storage in which the compressor is operated to store cold heat in the cool storage material in the cool storage material container (16). ) Shows the amount of moving cold heat transferred from the outer fin (17) disposed in the ventilation gap (15) next to the refrigerant flow pipe (13) to the cool storage material container (16). Further, the vertical axis on the right side of the graphs shown in FIGS. 5 and 6 represents the cold storage container (16) when the compressor is stopped and the cold storage is cooled from the cold storage material in the cold storage container (16). ) From the refrigerant flow pipe (13) to the outer fin (17) arranged in the ventilation gap (15) adjacent to the ventilation gap (15) where the cool storage material container (16) is arranged. Show. From the graph shown in FIG. 5, the range in which the average temperature of the wind that has passed through the heat exchange core portion (4) during cooling is effectively reduced is that the thickness of the partition (34) is 0.1 to 0.4 mm. It turns out that it is. When the thickness of the partition (34) exceeds 0.4 mm, the degree of decrease in the average temperature becomes gradual. Further, from the graph shown in FIG. 6, during the cold storage, the refrigerant circulation pipe (from the outer fin (17) arranged in the ventilation gap (15) adjacent to the ventilation gap (15) in which the cold storage material container (16) is arranged. 13) Passes through the refrigerant storage pipe (13) from the cold storage container (16) through the refrigerant storage pipe (13) when it is allowed to cool, and the amount of mobile cold energy transmitted to the cold storage container (16) is large and has excellent cold storage performance. The range in which the amount of moving cold heat transmitted to the outer fin (17) arranged in the ventilation gap (15) adjacent to the ventilation gap (15) where the cold storage material container (16) is arranged is large and the cooling performance is excellent is It can be seen that the thickness of the partition (34) is 0.1 to 0.4 mm. The reason why the lower limit of the thickness t of the partition (34) is set to 0.1 mm is that if it is thinner than this, it is difficult to manufacture.

  Also, when the pipe height, which is the dimension in the thickness direction of the refrigerant flow pipe (13), is Hmm and the height of the partition is hmm, 0.64 ≦ h / H ≦ 0.86 is satisfied. This is because the results shown in FIGS. 7 and 8 were obtained by computer simulation calculation. This computer simulation calculation shows that the width W of the refrigerant flow pipe (13) is 16.95 mm, the pipe height is H = 1.4 mm, the number of partitions (34) is n = 13, the thickness of the partition (34) is t = 0. It was set to 2 mm, and the ratio of the height h of the partition (34) to the tube height H was changed.

  The vertical axis on the left side of the graph shown in FIG. 7 has passed through the heat exchange core section (4) when the compressor is stopped and the cool storage material in the cool storage material container (16) is cooled. Indicates the average temperature of the wind. The vertical axis on the left side of the graph shown in FIG. 8 indicates the ventilation gap (15) in which the cool storage material container (16) is disposed during cold storage in which the compressor is operated to store cold heat in the cool storage material in the cool storage material container (16). ) Shows the amount of moving cold heat transferred from the outer fin (17) disposed in the ventilation gap (15) next to the refrigerant flow pipe (13) to the cool storage material container (16). The vertical axis on the right side of the graphs shown in FIGS. 7 and 8 indicates the cold storage container (16) when the compressor is stopped and the cold storage is cooled from the cold storage material in the cold storage container (16). ) From the refrigerant flow pipe (13) to the outer fin (17) arranged in the ventilation gap (15) adjacent to the ventilation gap (15) where the cool storage material container (16) is arranged. Show. From the graph shown in FIG. 7, the range in which the average temperature of the wind that has passed through the heat exchange core (4) at the time of cooling is efficiently reduced is the ratio h / H of 0.64 to 0.86. I understand that there is. When the ratio is less than 0.64, the degree of decrease in the average temperature becomes moderate. Further, from the graph shown in FIG. 8, during the cold storage, the refrigerant circulation pipe (from the outer fin (17) arranged in the ventilation gap (15) adjacent to the ventilation gap (15) in which the cold storage material container (16) is arranged. 13) Passes through the refrigerant storage pipe (13) from the cold storage container (16) through the refrigerant storage pipe (13) when it is allowed to cool, and the amount of mobile cold energy transmitted to the cold storage container (16) is large and has excellent cold storage performance. The range in which the amount of moving cold heat transmitted to the outer fin (17) arranged in the ventilation gap (15) adjacent to the ventilation gap (15) where the cold storage material container (16) is arranged is large and the cooling performance is excellent is It can be seen that the ratio h / H is 0.64 to 0.86. The reason why the upper limit of the ratio h / H is set to 0.86 is that it is difficult to manufacture when the ratio h / H is exceeded.

  FIG. 9 shows another embodiment of an evaporator with a cold storage function according to the present invention.

  In the evaporator with a cold storage function shown in FIG. 9, the aluminum cold storage material container (40) has a flat shape in which the cold storage material (not shown) is enclosed and the width direction is directed in the front-rear direction. It is arranged on one side of each set (14) composed of the refrigerant flow pipe (13), here on the left side, so as to straddle the two refrigerant flow pipes (13) of each set (14). Each set (14) composed of two refrigerant flow pipes (13) arranged in the front-rear direction and the regenerator container (40) arranged across the two refrigerant flow pipes (13) of each set (14) A plurality of combinations (41) are configured. The combination body (41) is arranged in the left-right direction with an interval between adjacent combination bodies (41) serving as a ventilation gap (15), and an aluminum outer fin in the ventilation gap (15). (17) is arranged and brazed to the refrigerant flow pipe (13) and the cool storage material container (40). The fin body portion (31) of the outer fin (17) located on the right side of the combination body (41) comprising the refrigerant flow pipe (13) and the cold storage container (40) of each pair (14) The outer projecting portion (32) is brazed to the outer projecting portion (22) of the cool storage material container (16). Further, the fin body portion (31) of the outer fin (17) located on the left side of the combination body (41) composed of the refrigerant flow pipe (13) and the cold storage material container (40) of each set (14) is a cold storage material container ( The container body part (21) of 16) is brazed, and the outwardly projecting part (32) is also brazed to the outwardly projecting part (22) of the cold storage material container (16).

  The cold storage material container (40) is positioned behind the front edge of the front refrigerant flow pipe (13) and is brazed to the refrigerant flow pipe (13) before and after each set (14). ) And the front side edge of the container main body (42), and is provided so as to protrude forward from the front refrigerant flow pipe (13), and the thickness direction (left-right direction) of the container main body (42) It consists of an outward projecting part (43) which became higher than the dimension of the thickness direction (left-right direction). The dimensions of the container main body (42) in the left-right direction are the same as the whole. The dimension of the laterally extending portion (43) in the left-right direction is equal to the height of the refrigerant flow pipe (13) in the thickness direction (left-right direction) of the container body (42) of the regenerator container (40). It is equal to the height with the dimension in the thickness direction added. The outward projecting portion (43) bulges only to the right with respect to the container body portion (42), and the left side surfaces of the container body portion (42) and the outward projecting portion (43) are flush with each other. As the cool storage material filled in the cool storage material container (40), for example, a water-based, paraffin-based or the like whose freezing point is adjusted to about 3 to 10 ° C is used. Further, the amount of the cold storage material filled in the cold storage material container (40) is preferably set so as to fill the entire cold storage material container (16) up to the upper end.

  Inside the cool storage material container (40), an aluminum inner fin (44) extending from the rear edge of the container main body (42) to the front end of the outwardly projecting part (43) is disposed over substantially the entire vertical direction. Has been. The inner fin (44) has a corrugated shape including a wave crest extending in the front-rear direction, a wave bottom extending in the front-rear direction, and a connecting portion connecting the wave crest and the wave bottom. The fin height of the inner fin (44) is the same as the whole, the inner surface of the left side wall of the container body (42) and the outwardly projecting part (43) of the cold storage material container (40), and the right side wall of the container body (42) It is brazed to the inner surface.

  The cool storage material container (40) is composed of two substantially vertical rectangular aluminum plates (45) and (46) in which peripheral portions are brazed to each other.

  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
(13): Refrigerant distribution pipe
(14): A set consisting of front and rear refrigerant distribution pipes
(15): Ventilation gap
(16) (40): Cold storage container
(17): Outer fin
(21) (42): Container body
(22) (43): Outward projecting part
(31): Fin body
(32): Outward projecting part
(33): Refrigerant flow path
(34): Partition
(41): Combination

Claims (9)

A plurality of flat refrigerant flow pipes extending in the vertical direction and having a width direction facing the ventilation direction are arranged in parallel with a space between each other, and at least one side of at least one refrigerant flow pipe has a cold storage A plurality of cold storage tubes arranged in the width direction of the refrigerant circulation pipe are arranged in the refrigerant circulation pipe in which the cold storage container filled with the material is placed and brought into thermal contact with the refrigerant circulation pipe An evaporator with a cold storage function in which the refrigerant flow path is provided via a partition,
When the thickness of the partition is tmm, the height of the partition is hmm, and the tube height that is the dimension in the thickness direction of the refrigerant flow tube is Hmm, 0.1 ≦ t ≦ 0.4, 0.64 ≦ h / H ≦ An evaporator with a cold storage function that satisfies the relationship of 0.86. The evaporator with a cool storage function according to claim 1, wherein the number of partitions is n and the width of the refrigerant flow pipe is Wmm, and satisfies the relationship of 0.07 ≦ (n × t) /W≦0.31. The evaporator with a cold storage function according to claim 1 or 2, wherein a pipe height H of the refrigerant flow pipe is 12 to 25 mm and a width W of the refrigerant flow pipe is 1.3 to 3.0 mm. Ventilation gaps are formed between adjacent refrigerant flow pipes, and a cool storage material container filled with a cool storage material is disposed in some of the ventilation gaps of all the ventilation gaps, and heat is supplied to the refrigerant flow pipes on both sides. A plurality of refrigerant flow paths arranged in the width direction of the refrigerant distribution pipe are provided via a partition in the refrigerant distribution pipes arranged on both sides of the cold storage material container. The evaporator with a cool storage function according to any one of claims 1 to 3. A cold storage material container is connected to a refrigerant body pipe, and a container main body part, and an outward projecting part provided so as to extend outward from the refrigerant circulation pipe to the leeward side edge of the container main body part. The fins arranged in the ventilation gap adjacent to the ventilation gap where the cool storage material container is provided are connected to the fin body part joined to the refrigerant circulation pipe and the leeward side edge part of the fin body part and the refrigerant circulation 5. An outward projecting portion provided so as to project outward from the pipe in the ventilation direction, and the outward projecting portion of the fin is in contact with both side surfaces of the outward projecting portion of the cold storage material container. Evaporator with cold storage function described. It is provided with a set of a plurality of flat refrigerant flow pipes that are oriented in the width direction in the ventilation direction and spaced apart in the ventilation direction, and the set is in a direction perpendicular to the width direction of the refrigerant flow pipe The evaporator with a cool storage function according to claim 4 or 5, wherein the evaporator main body portion of the cool storage material container is joined so as to straddle all the coolant circulation pipes of a set including a plurality of refrigerant circulation pipes. The cool storage material container is disposed only on one side of the refrigerant flow pipe and is brought into thermal contact with the refrigerant flow pipe, and the cool storage material container is joined to the refrigerant flow pipe, and the leeward side edge of the container main body part The evaporator with a cool storage function according to any one of claims 1 to 3, further comprising an outward projecting portion provided so as to project to the outside in the ventilation direction from the refrigerant circulation pipe. A combination body composed of a refrigerant storage pipe and a cold storage material container having a container main body joined to the refrigerant distribution pipe is arranged at intervals in a direction perpendicular to the width direction of the refrigerant distribution pipe, and the adjacent combination bodies A fin body portion in which a gap is formed between the fins, fins are disposed in the ventilation gap, and one of the two fins disposed on both sides of one combination is joined to the refrigerant flow pipe, and a fin body portion And an outward projecting portion provided so as to project outward from the refrigerant flow pipe in the ventilation direction. Similarly, the other fin is joined to the container body of the regenerator container. A fin body portion and an outwardly extending portion that is connected to the leeward side edge portion of the fin body portion and extends outward from the container body portion in the ventilation direction. On both sides of the projecting portion, the both sides of the outer evaporator with a cool storage function according to claim 7, wherein the projecting portion is in contact fins. A plurality of the refrigerant circulation pipes of each combination are arranged at intervals in the ventilation direction, and the container main body of the cold storage material container of the combination is arranged so as to straddle all the refrigerant circulation pipes of the combination. The evaporator with a cool storage function according to claim 8, which is joined to the flow pipe.

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