JP2018044683A - Evaporator with cold storage function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an evaporator with a cold storage function capable of extending a cooling time while suppressing deterioration of cooling performance in normal cooling.SOLUTION: An evaporator with a cold storage function includes a heat exchange core portion 4 which has a plurality of refrigerant circulation pipes 12, 13 made of the same material, a cold storage material container 16, and outer fins 17, and in which clearances 15A, 15B are respectively formed between the refrigerant circulation pipes 12, 13 adjacent to each other. The cold storage material container 16 is disposed in the first clearance 15A, and the outer fins 17 are disposed in the second clearances 15B. In the whole refrigerant circulation pipes 12, 13, the first refrigerant circulation pipes 12 kept into contact with the outer fins 17 at right and left both side walls 12a, and the second refrigerant circulation pipes 13 kept into contact with the cold storage material container 16 at one side wall 13a, and kept into contact with the outer fins 17 at the other side wall 13b, are included. A thickness of the side walls 13a kept into contact with the cold storage material container 16 of the second refrigerant circulation pipes 13 is more than a thickness of the right and left both side walls 12a of the first refrigerant circulation pipes 12.SELECTED DRAWING: Figure 2

Description

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

  In this specification and claims, the top and bottom, left and right (up and down, left and right in FIG. 1) viewed from the downstream side in the ventilation direction indicated by arrow X in FIGS.

  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.

  In the car air conditioner of the automobile, it is considered that 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 passenger compartment. Yes.

  As an evaporator with this type of cool storage function, the present applicant has previously described a plurality of flat refrigerant flow pipes whose longitudinal direction is directed in the vertical direction and the width direction is directed in the ventilation direction, and the cool storage material in which the cool storage material is enclosed. A heat exchange core portion having a container and an outer fin is provided, and in the heat exchange core portion, a plurality of sets of two refrigerant flow tubes arranged in the ventilation direction are arranged at intervals in the left-right direction. Accordingly, a gap is formed between adjacent pipe sets, and the regenerator container is disposed in a part of the total gap and in a plurality of gaps so as to be in contact with the refrigerant flow pipe. The outer fin is disposed in contact with the refrigerant flow pipe in the gap, the gap in which the outer fin is disposed is a ventilation gap, and the material of all the refrigerant flow pipes is the same. Both left and right There are a first refrigerant flow pipe that is in contact with the outer fin, and a second refrigerant flow pipe that has at least one of the left and right side walls in contact with the cold storage material container, and both left and right sides of the first refrigerant flow pipe An evaporator with a cold storage function in which the wall thickness and the wall thickness of the left and right side walls of the second refrigerant distribution pipe are the same has been proposed (see Patent Document 1).

  According to the evaporator with a cold storage function described in Patent Document 1, during normal cooling when the compressor is operating, the cold heat of the refrigerant flowing in the first refrigerant flow pipe is transferred to the outer fins on both sides via the left and right side walls. The air flowing through the ventilation gap is cooled by the cold heat transmitted to the outer fin, and the cooled air is sent into the passenger compartment. Further, during normal cooling when the compressor is operating, the cold heat of the refrigerant flowing in the second refrigerant flow pipe is stored in the cold storage material container via the side walls of the left and right side walls that are in contact with the cold storage material container. It is transmitted to the material and stored in the cold storage material.

  When the compressor is stopped, the cold heat stored in the regenerator material in the regenerator material container is such that one of the left and right side walls is in contact with the regenerator material container and the other side wall is in contact with the outer fin. Cold heat transferred to the second refrigerant flow pipe via the one side wall in contact with the cold storage material container in the refrigerant flow pipe, transferred to the outer fin via the other side wall of the second refrigerant flow pipe, and transferred to the outer fin Thus, the air flowing through the ventilation gap is cooled, and the cooled air is sent into the passenger compartment. Therefore, when the engine is stopped and the compressor is stopped, it is possible to cool the vehicle interior by cooling the cold stored in the evaporator, and the cooling capacity when the engine stops is drastically reduced. It is suppressed.

  By the way, in the evaporator with a cool storage function described in Patent Document 1, it is effective to increase the amount of the cool storage material in order to lengthen the cool cooling time when the engine is stopped and the compressor is stopped. In this case, when the height and the horizontal dimension of the heat exchange core are constant, it is necessary to increase the number of cold storage material containers, and the number of ventilation gaps in which outer fins are arranged is reduced. The cooling performance is reduced.

JP 2014-126307 A

  This invention solves the said problem, and provides the evaporator with a cool storage function which can extend the cooling time, suppressing the fall of the cooling performance at the time of normal cooling.

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

1) A heat exchange core portion having a plurality of flat refrigerant flow pipes whose longitudinal direction is directed in the vertical direction and the width direction is directed in the ventilation direction, a cold storage material container enclosing the cold storage material, and an outer fin. In the heat exchange core portion, a plurality of refrigerant flow pipes are arranged at intervals in the left-right direction, so that a gap is formed between the refrigerant flow pipes adjacent in the left-right direction, and the regenerator container is A part of the entire gap and a plurality of gaps are arranged so as to be in contact with the refrigerant circulation pipe, and an outer fin is arranged so as to be in contact with the refrigerant circulation pipe in a plurality of gaps remaining in the whole gap. An evaporator with a cold storage function,
The material of all the refrigerant circulation pipes is the same, and the first refrigerant circulation pipe whose left and right side walls are in contact with the outer fins and either one of the left and right side walls are the cold storage container. And a second refrigerant circulation pipe whose other side wall is in contact with the outer fin, and the thickness of the side wall in contact with the cold storage material container in the second refrigerant distribution pipe is equal to that of the first refrigerant circulation pipe. Evaporator with cool storage function that is larger than the wall thickness on both sides.

  2) The evaporator with a cool storage function according to 1), wherein the thickness of the side wall in contact with the cool storage material container in the second refrigerant flow pipe is larger than the thickness of the side wall in contact with the outer fin.

  3) The thickness of the left and right side walls of the first refrigerant flow pipe is the same, and the thickness of the side wall in contact with the outer fin in the second refrigerant flow pipe is equal to the thickness of the left and right side walls of the first refrigerant flow pipe. The evaporator with a cold storage function as described in 2) above, which is the same.

  4) The thickness of the left and right side walls of the first refrigerant flow pipe is the same, the thickness of the left and right side walls of the second refrigerant flow pipe is the same, and the thickness of the left and right side walls of the first refrigerant flow pipe The evaporator with a cold storage function as described in 1), which is also larger.

  According to the evaporator with a cold storage function of the above 1) to 4), the material of all the refrigerant circulation pipes is the same, and the first refrigerant circulation pipe whose left and right side walls are in contact with the outer fins in all the refrigerant circulation pipes And a second refrigerant flow pipe in which one of the left and right side walls is in contact with the cold storage material container and the other side wall is in contact with the outer fin, and is in contact with the cold storage material container in the second refrigerant flow pipe. Since the thickness of the side wall is larger than the thickness of the left and right side walls of the first refrigerant flow pipe, the heat capacity of the side wall in contact with the cold storage material container in the second refrigerant flow pipe is the first refrigerant flow pipe. It becomes larger than the heat capacity of the left and right side walls. Therefore, when the wall thickness of the left and right side walls of the first refrigerant flow pipe is equal to the wall thickness of the left and right side walls of the first refrigerant flow pipe of Patent Document 1, when the compressor is stopped, the cold storage material in the cold storage container is used. The time until the stored cold heat is transmitted to the outer fin through the second refrigerant flow pipe can be delayed as compared with the evaporator with the cold storage function described in Patent Document 1, and the air flowing through the ventilation gap is cooled by the outer fin. The cooling time to be extended can be extended. In addition, the thickness of the left and right side walls of the first refrigerant flow pipe can be made thick enough to efficiently transfer the cold heat of the refrigerant flowing in the first refrigerant flow pipe to the outer fin during normal cooling. It is possible to suppress an increase in the number of containers and suppress a decrease in the number of ventilation gaps in which outer fins are arranged, and it is possible to suppress a decrease in cooling performance during normal cooling.

  According to the evaporator with a cold storage function of 2) and 3) above, the thickness of the side wall in contact with the outer fin in the second refrigerant circulation pipe is set to the outer fin with the cold heat of the refrigerant flowing in the second refrigerant circulation pipe during normal cooling. The thickness can be transmitted efficiently, and a decrease in cooling performance during normal cooling can be suppressed.

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 an AA line expanded sectional view of FIG. It is a left view which shows the cool storage material container used for the evaporator with a cool storage function of FIG. FIG. 3 is an enlarged view of a main part of FIG. 2. It is a principal part enlarged view of FIG. 2 which shows a different part from FIG. FIG. 5 shows a modified example of the second refrigerant flow pipe in which one of the left and right side walls of the evaporator with the cold storage function in FIG. 1 is in contact with the cold storage material container and the other side wall is in contact with the outer fin. FIG.

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

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

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

  1 to 3, an evaporator with a cold storage function (1) has an aluminum upper header tank (with an interval in the vertical direction with the longitudinal direction facing the left and right direction and the width direction facing the ventilation direction) 2) and an aluminum lower header tank (3), and a heat exchange core section (4) provided between the header tanks (2) and (3).

  The upper header tank (2) includes a leeward upper header portion (5) located on the leeward side and an upwind header portion (6) located on the leeward side and integrated with the leeward upper header portion (5). And. 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 lower header tank (3) includes a leeward lower header portion (9) located on the leeward side and an upwind lower header portion (11) located on the leeward side and integrated with the leeward lower header portion (9). And.

  In the heat exchanging core part (4), a plurality of, in this case, two aluminum flat refrigerants arranged at intervals in the ventilation direction with the longitudinal direction oriented vertically and the width direction oriented in the ventilation direction A plurality of pipe sets (14) consisting of pipes (12) and (13) are arranged at intervals in the left-right direction, and thereby pipes consisting of two refrigerant flow pipes (12) and (13) aligned in the ventilation direction A gap (15A) (15B) is formed between adjacent ones of the set (14). The upper ends of the refrigerant flow pipes (12) and (13) arranged on the leeward side are connected to the leeward upper header part (5), and the lower ends thereof are connected to the leeward lower header part (9). Further, the upper ends of the refrigerant flow pipes (12) and (13) arranged on the windward side are connected to the windward upper header part (6), and the lower ends thereof are connected to the windward lower header part (11). Yes.

  The materials of all the refrigerant flow pipes (12) and (13) are the same. In all the refrigerant flow pipes (12) and (13), the second gap (15B) adjacent to each other in the left-right direction is located between the left and right side walls (12a) and the outer fin (17). 1 Refrigerant flow pipe (12) and one side wall (13a) of left and right side walls (13a) (13b) located on the left and right sides of the first gap (15A) are connected to the regenerator container (16). There is a second refrigerant flow pipe (13) in contact with the other side wall (13b) in contact with the outer fin (17) (see FIG. 2).

  An aluminum regenerator container (16) in which a regenerator material is sealed in a part of the total gaps (15A) and (15B) in the heat exchange core (4) and in a plurality of first gaps (15A) It arrange | positions so that it may straddle two 2nd refrigerant | coolant flow pipes (13) which comprise a group (14), and is joined to one side wall (13a) of the said both refrigerant | coolant flow pipes (13) by the brazing material. Hereinafter, joining with a brazing material is referred to as brazing. Of the entire gap (15A) (15B) in the heat exchange core (4), the remaining plurality of second gaps (15B) are made of an aluminum brazing sheet having a brazing filler metal layer on both sides, and the wave crest extends in the ventilation direction. The corrugated outer fin (17) comprising the wave bottom portion extending in the ventilation direction and the connecting portion connecting the wave top portion and the wave bottom portion, the two first and second refrigerant circulations constituting each pipe assembly (14) It arrange | positions so that a pipe | tube (12) (13) may be straddled, and the 2nd clearance gap (15B) is a ventilation gap. The outer fins (17) disposed in the second gap (15B) adjacent to the first gap (15A) are one side wall (12a) of the first refrigerant flow pipe (12) and the second refrigerant flow pipe (13). The outer fin (17) disposed in the other second gap (15B) is brazed to the other side wall (13b) of the first refrigerant flow pipe (12) and is brazed to the side wall (12a) of the first refrigerant flow pipe (12). Yes. Outer fins (17) are also arranged outside the pipe assemblies (14) at both left and right ends so as to straddle the two first refrigerant circulation pipes (12) constituting the pipe assembly (14). An aluminum side plate (18) is disposed outside the outer fins (17) at the left and right ends, and is brazed to the outer fins (17).

  There are a plurality of (here, three) second gaps (15B) between two first gaps (15A) adjacent in the left-right direction. The number of second gaps (15B) between two first gaps (15A) adjacent in the left-right direction is preferably 2 or more, and the upper limit is preferably 7. Two first gaps (15A) may be formed side by side in the left-right direction, and two or more second gaps (15B) may be formed between a pair of two first gaps (15A) arranged in the left-right direction. ) May be formed.

  The windward end of the outer fin (17) is in the same position in the ventilation direction as the windward end of the windward refrigerant flow pipe (12) (13), and the leeward end of the outer fin (17) is the leeward refrigerant. It is in a position that protrudes slightly to the leeward side, for example, about 1 mm, with respect to the leeward side end portions of the flow pipes (12) and (13). The width of the outer fin (17) in the ventilation direction is the full width of the heat exchange core (4) in the ventilation direction.

  The cool storage material container (16) is a flat, hollow shape having a substantially vertical rectangular shape in which the longitudinal direction is directed in the vertical direction and the width direction is directed in the ventilation direction, and is within the full width range of the heat exchange core portion (4) in the ventilation direction. A container body part (19) brazed to the two second refrigerant flow pipes (13) of each pipe assembly (14), and a part of the leeward side edge of the container body part (19), here It consists of only an upper part and an outward projecting part (21) provided so as to project to the leeward side from the leeward side end part of the outer fin (17) (see FIG. 3).

  The cold storage material container (16) is formed by pressing an aluminum brazing sheet having a brazing filler metal layer on both sides, and the peripheral strips (22a) (23a) having a certain width are brazed to each other. It is composed of two substantially vertical rectangular aluminum container constituting plates (22) and (23). The cool storage material container (16) has a hollow cool storage material enclosing portion (2) by extruding the portions excluding the strips (22a) and (23a) of the container constituting plates (22) and (23) outward ( 24) is formed from the container body part (19) to the outwardly projecting part (21), and the regenerator material is placed in the regenerator material enclosing part (24).

  On the outer surfaces of the left and right side walls (25) of the portion of the cool storage material enclosure (24) of the cool storage material container (16) on the left and right side walls (25), the upper and lower ends have a fixed channel length in the vertical direction. And a plurality of condensate drain grooves (26) for draining condensate from above to drain from the lower end opening are formed at intervals in the ventilation direction (see FIG. 3). Each condensate drainage groove (26) is provided in a portion of the cooler material enclosure (24) of the cool storage material container (16) on the left and right side walls (25) of the container body (19) and bulges outward. It is formed between the two raised drain groove projections (27). Two adjacent condensate drainage grooves (26) share a drainage groove convex portion (27) located between the two condensate drainage grooves (26). At least a part of the bulging ends of all the drain groove projections (27) is one of the two second refrigerant flow pipes (13) constituting the pipe assemblies (14) on both the left and right sides of the first gap (15A). Are brazed to the side wall (13a). The condensate drain groove (26) and drain groove convex portion (27) on the left side wall (25) and the condensate drain groove (26) and drain groove convex portion (27) on the right side wall (25) So as not to overlap with each other in the same horizontal plane. A very small amount of air also flows in the condensed water drainage groove (26).

  In the container main body portion (19) of the cold storage material container (16), an offset aluminum inner fin (28) is disposed over substantially the entire vertical direction. The inner fin (28) has a plurality of corrugated strips (29) composed of a wave crest portion extending in the vertical direction, a wave bottom portion extending in the vertical direction, and a connecting portion connecting the wave crest portion and the wave bottom portion arranged in the vertical direction. The wave crests and wave crests of two corrugated strips (29) that are formed by being integrally connected to each other in the vertical direction are displaced in the ventilation direction (see FIG. 2). .

  In the outwardly projecting portion (21) of the cold storage material container (16), the expansion portion (21a) swells in both the left and right directions, and the horizontal dimension is equal to or greater than the horizontal dimension of the cold storage material enclosure (24). Is provided, and the expansion part (21a) is positioned on the outer side in the ventilation direction (downstream side in the ventilation direction) than the downstream end of the outer fin (17) in the ventilation direction. A cool storage material injection member (31) is fixed to the upper end portion of the outwardly projecting portion (21) of the cool storage material container (16), and the cool storage material is supplied through the cool storage material injection member (31). The cool storage material injecting member (31) is sealed after the cool storage material is injected into the cool storage material enclosing portion (24).

  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 all the refrigerant flow pipes (12) (13). It flows out from the refrigerant outlet (8) of the upwind header section (6).

  As shown in FIGS. 4 and 5, the thickness (t1) of the left and right side walls (12a) of the first refrigerant flow pipe (12) is the same. The wall thickness (t2) of the side wall (13a) in contact with the cool storage material container (16) in the second refrigerant flow pipe (13) is the thickness of the left and right side walls (12a) of the first refrigerant flow pipe (12). It is larger than the thickness (t1) and the wall thickness (t3) of the side wall (13b) in contact with the outer fin (17) in the second refrigerant flow pipe (13). The thickness (t3) of the side wall (13b) in contact with the outer fin (17) in the second refrigerant flow pipe (13) is the thickness (t1) of the left and right side walls (12a) of the first refrigerant flow pipe (12). ). The wall thickness (t3) of the side wall (13b) in contact with the outer fin (17) in the second refrigerant flow pipe (13) is not necessarily the thickness of the left and right side walls (12a) of the first refrigerant flow pipe (12). It need not be the same as the thickness (t1). Further, a plurality of flow paths (32), (33) arranged in the ventilation direction are formed in both refrigerant flow pipes (12), (13) via partition walls (34), (35).

  The evaporator with a cold storage function (1) is 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 reduces the refrigerant that has passed through the condenser (decompressor) ) And a refrigeration cycle, and is mounted as a car air conditioner on a vehicle, for example, an automobile, that temporarily stops an engine that is a drive source of the compressor when the vehicle stops.

  During normal cooling 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 (1 ) Enters the leeward upper header portion (5), passes through all the refrigerant flow pipes (12) and (13), enters the windward upper header portion (6), and flows out from the refrigerant outlet (8). At this time, the cold heat of the refrigerant flowing in the first refrigerant flow pipe (12) is disposed in the second gap (15B) on both the left and right sides through the left and right side walls (12a) of the first refrigerant flow pipe (12). It is transmitted to the outer fin (17). In addition, the cold heat of the refrigerant flowing in the second refrigerant flow pipe (13) is transferred to the outer fins (15B) on both sides of the first gap (15A) in the second refrigerant flow pipe (13) ( It is transmitted to the outer fin (17) through the side wall (13b) in contact with 17). Then, the air flowing through the second gap (15B) is cooled by the cold heat transmitted to the outer fin (17), and the cooled air is sent into the passenger compartment to be cooled. On the other hand, the refrigerant that has flowed through the refrigerant flow pipes (12) and (13) flows out as a gas phase.

  Further, during normal cooling when the compressor is operating, the cold heat of the refrigerant flowing in the second refrigerant flow pipe (13) is in contact with the cold storage material container (16) in the second refrigerant flow pipe (13). Drainage that is transmitted to the side wall (13a) and is provided in a portion of the left and right side walls (25) of the cool storage material enclosure part (24) of the cool storage material container (16) that exists in the container main body (19) from the side wall (13a). It is transmitted directly to the cold storage material in the cold storage material container (16) through the bulging top wall of the groove convex portion (27) and from the bulging top wall of the drain groove convex portion (27) to the left and right side walls (25). Cold energy is stored in the regenerator material by being transmitted to the whole regenerator material in the regenerator material container (16) via the portion not brazed to the refrigerant flow pipe (13) and the inner fin (28).

  During normal cooling when the compressor is operating, the refrigerant that has flowed through all the refrigerant flow pipes (12) and (13) flows out as a gas phase.

  During normal cooling when the compressor is operating, condensed water is generated on the surface of the cool storage material container (16), and the condensed water enters the condensed water drain groove (26). When the amount of condensed water accumulated in the condensed water drainage groove (26) increases, the gravity acting on the accumulated condensed water becomes larger than the surface tension and flows down in the condensed water drainage groove (26) and drains downward. .

  When the compressor is stopped, the cold energy stored in the regenerator material in the regenerator material container (16) is transferred to the container body (19) on the left and right side walls (25) of the regenerator material enclosing part (24) of the regenerator material container (16). ) Through the bulging top wall of the drain groove convex portion (27) provided in the portion existing in the) and being transmitted to the side wall (13a) in contact with the cold storage material container (16) in the second refrigerant flow pipe (13) The second refrigerant flow pipe passes through the inner fin (28) and the left and right side walls (25) not brazed to the second refrigerant flow pipe (13) and the bulging top wall of the drain groove convex part (27). It is transmitted to the side wall (13a) in contact with the cold storage material container (16) in (13). The cold heat transmitted to the side wall (13a) is transmitted to the outer fin (17) through the side wall (13b) in contact with the partition wall (35) and the outer fin (17), and the second side of the first gap (15A). It is transmitted to the air passing through the two gaps (15B). The cold heat transmitted to the outer fin (17) is transmitted to the air passing through the second gap (15B) adjacent to the first gap (15A) where the cool storage material container (16) is disposed. 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 compressor is stopped, the wall thickness (t2) of the side wall (13a) in contact with the cool storage material container (16) in the second refrigerant flow pipe (13) is the left and right sides of the first refrigerant flow pipe (12). Since it is larger than the wall thickness (t1) of the wall (12a), the heat capacity of the side wall (13a) in contact with the cold storage material container (16) in the second refrigerant flow pipe (13) is the first refrigerant flow pipe ( It becomes larger than the heat capacity of the left and right side walls (12a) of 12). Accordingly, when the compressor is stopped, the time for the cold heat stored in the cold storage material in the cold storage material container (16) to be transmitted to the outer fin (17) through the second refrigerant flow pipe (13) is relatively delayed. The cooling time from the outer fin (17) to the air flowing through the second gap (15B) can be extended. Moreover, the wall thickness (t1) of the left and right side walls (12a) of the first refrigerant flow pipe (12) and the wall thickness (13b) of the second refrigerant flow pipe (13) in contact with the outer fin (17) ( t3) can be made thick enough to efficiently transfer the cold heat of the refrigerant flowing in both refrigerant flow pipes (12) and (13) to the outer fin (17) during normal cooling, and the cold storage container (16 ) To suppress the decrease in the number of second gaps (15B) in which the outer fins (17) are arranged, thereby suppressing the decrease in cooling performance during normal cooling. Can do.

  FIG. 6 shows the evaporator with a cool storage function according to the present invention, which is located on both the left and right sides of the first gap (15A) and one side wall is in contact with the cool storage material container (16) and the other side wall is on the outer fin (17). The modification of the 2nd refrigerant | coolant flow pipe which is in contact is shown.

  The wall thickness (t4) of the left and right side walls (40a) and (40b) of the second refrigerant flow pipe (40) shown in FIG. 6 is the same as each other, and the left and right side walls (12a) of the first refrigerant flow pipe (12). It is larger than the wall thickness. That is, it is located on both the left and right sides of the first gap (15A), and one of the left and right side walls (40a, 40b) is in contact with the cold storage material container (16) and the other side wall ( The wall thickness (t4) of the left and right side walls (40a) and (40b) of the second refrigerant flow pipe (40) in contact with the outer fin (17) is the same as each other, and the first refrigerant flow pipe (12 ) Larger than the wall thickness of the left and right side walls (12a).

  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): First refrigerant distribution pipe
(12a): Left and right side walls
(13) (40): Second refrigerant flow pipe
(13a) (40a): Side wall in contact with cold storage container
(13b) (40b): Side wall in contact with outer fin
(15A): 1st gap (ventilation gap)
(15B): Second gap
(16): Cold storage container
(17): Outer fin

Claims (4)

A plurality of flat refrigerant flow pipes whose longitudinal direction is directed in the vertical direction and the width direction is directed in the ventilation direction, a cold storage material container in which a cold storage material is enclosed, and a heat exchange core portion having an outer fin, In the heat exchange core portion, a plurality of refrigerant flow pipes are arranged at intervals in the left-right direction, so that gaps are formed between the refrigerant flow pipes adjacent in the left-right direction, and the cold storage material container is A cold storage function in which a part of the gap and a plurality of gaps are arranged so as to be in contact with the refrigerant circulation pipe, and an outer fin is arranged so as to be in contact with the refrigerant circulation pipe in a plurality of gaps remaining in the entire gap. With an evaporator,
The material of all the refrigerant circulation pipes is the same, and the first refrigerant circulation pipe whose left and right side walls are in contact with the outer fins and either one of the left and right side walls are the cold storage container. And a second refrigerant circulation pipe whose other side wall is in contact with the outer fin, and the thickness of the side wall in contact with the cold storage material container in the second refrigerant distribution pipe is equal to that of the first refrigerant circulation pipe. Evaporator with cool storage function that is larger than the wall thickness on both sides. The evaporator with a cool storage function according to claim 1, wherein the thickness of the side wall in contact with the cool storage material container in the second refrigerant circulation pipe is larger than the thickness of the side wall in contact with the outer fin. The thickness of the left and right side walls of the first refrigerant flow pipe is the same, and the thickness of the side wall in contact with the outer fin in the second refrigerant flow pipe is the same as the thickness of the left and right side walls of the first refrigerant flow pipe. The evaporator with a cool storage function according to claim 2. The wall thickness of the left and right side walls of the first refrigerant flow pipe is the same, the wall thickness of the left and right side walls of the second refrigerant flow pipe are the same, and larger than the wall thickness of the left and right side walls of the first refrigerant flow pipe. The evaporator with a cool storage function according to claim 1.

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