JP2017116254A - Evaporator with cold storage function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an evaporator with cold storage function, having cold storage function.SOLUTION: Cold storage material containers 15 enclosing a cold storage material are arranged in a plurality of ventilation gaps 14 of part of the whole ventilation gaps 14 of an evaporator 1 with cold storage function, and first outer fins 16 are arranged in the remaining ventilation gaps 14. Second outer fins 16a are arranged outside refrigerant flow pipes 12 on both right and left sides of the evaporator 1 with cold storage function and brazed to the refrigerant flow pipes 12, and side plates 17 are arranged outside the second outer fins 16a on both right and left sides and brazed to the second outer fins 16a. The evaporator 1 with cold storage function includes an arrangement part 20 where the side plates 17, the second outer fins 16a, the refrigerant flow pipes 12 and the cold storage material containers 15 are continuously arranged.SELECTED DRAWING: Figure 2

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

  As an evaporator with a cold storage function, the present applicant has previously made a plurality of flats with a longitudinal direction directed in the vertical direction and a width direction directed in the ventilation direction between a pair of tanks arranged at intervals in the vertical direction. The refrigerant flow pipes are arranged at intervals in the thickness direction of the refrigerant flow pipes, a ventilation gap is formed between the adjacent refrigerant circulation pipes, and a cool storage material is provided in some of the whole ventilation gaps. Is disposed, and the outer fins are disposed in the remaining ventilation gap, and the cool storage material container is connected to the refrigerant body pipe and the leeward side edge portion of the container body portion. And an outer projecting portion provided to extend outward in the ventilation direction from the refrigerant circulation pipe, and an inner portion extending from the container main body portion to the outer projecting portion. Fins are placed An evaporator with a cold storage function, in which an inner fin is offset, and a corrugated belt plate comprising a wave crest extending in the ventilation direction, a wave bottom extending in the ventilation direction, and a connecting portion connecting the wave crest and the wave bottom, An evaporator with a cold storage function formed by a plurality of elements arranged in the direction and integrally connected to each other, wherein wave crests and wave bottoms of two waved strips adjacent to each other in the ventilation direction are displaced in the vertical direction In addition, an evaporator with a cold storage function that includes a corrugated inner fin, a wave crest extending in the ventilation direction, a wave bottom extending in the ventilation direction, and a connecting portion that connects the wave crest and the wave bottom is proposed (see Patent Document 1). ).

  However, when the evaporator with a cold storage function described in Patent Document 1 is used in a car air conditioner for an automobile, when the cold storage material in the cold storage material container is in a liquid phase, the liquid phase cold storage material becomes a cold storage material container due to shaking or vibration of the automobile. There is a risk that abnormal noise may occur due to large movement in the ventilation direction.

JP 2011-149684 A

  The objective of this invention is providing the evaporator with a cool storage function which solves the said problem and can suppress the movement of the liquid phase cool storage material in the ventilation direction in the cool storage material container.

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

1) A plurality of flat refrigerant flow pipes whose longitudinal direction faces the up-down direction and whose width direction faces the ventilation direction are arranged in parallel at intervals in the left-right direction, and between adjacent refrigerant flow pipes Ventilation gaps are formed, and a cool storage material container in which a cool storage material is sealed in a plurality of ventilation gaps among all the ventilation gaps is disposed, inner fins are disposed in the cool storage material container, and the remaining ventilation gaps are One outer fin is disposed and joined to the refrigerant circulation pipe, and second outer fins are arranged outside the refrigerant circulation pipe at the left and right ends and joined to the refrigerant circulation pipe by a brazing material, and the second outer fins at the left and right ends. An evaporator with a cold storage function in which a side plate is disposed outside and joined to the second outer fin by a brazing material,
The evaporator with a cool storage function provided with the part which the side plate, the 2nd outer fin, the refrigerant | coolant distribution pipe, and the cool storage material container are located in a line.

  2) The evaporator with a cold storage function according to the above 1), wherein an end ventilation gap is formed between the refrigerant flow pipes on the left and right ends and the side plate.

  3) The evaporator with a cold storage function according to the above 1) or 2), wherein the line-up portion is provided at either one of the left and right ends.

  4) A side plate, a second outer fin, a refrigerant circulation pipe, a first outer fin, a refrigerant circulation pipe, and a cold storage material container are continuously arranged at an end opposite to the one end where the arrangement portion is provided. The evaporator with a cool storage function as described in 3) above, wherein the second arrangement portion is provided.

  5) A set of a plurality of flat refrigerant flow pipes arranged in the left-right direction are arranged in the left-right direction with the longitudinal direction facing the up-and-down direction and the width direction facing the ventilation direction and spaced in the ventilation direction. The evaporator with a cold storage function according to any one of the above 1) to 4), wherein a ventilation gap is formed between adjacent pairs.

  According to the evaporator with a cold storage function of the above 1) to 5), the generation of abnormal noise due to the large movement of the cold storage material in the cold storage material container is suppressed.

It is a perspective view which shows the whole structure of the evaporator with a cool storage function of this invention. It is the front view seen from the ventilation direction downstream which shows the whole structure of the evaporator with a cool storage function of this invention. It is a left view which shows the cool storage material container used for the evaporator with a cool storage function of FIG. 1 and FIG. It is an AA line expanded sectional view of FIG. It is a figure corresponding to a part of Drawing 3 which shows the upper part of the cool storage material container used for the evaporator with a cool storage function of Drawing 1 and Drawing 2, and cuts off the left metal plate. It is a disassembled perspective view which shows the cool storage material container used for the evaporator with a cool storage function of FIG. 1 and FIG. FIG. 5 is a view corresponding to a part of FIG. 4 showing a state in which the internal pressure of the cool storage material container used in the evaporator with the cool storage function of FIGS. 1 and 2 is abnormally increased. It is a figure equivalent to FIG. 5 which shows the modification of the inner fin arrange | positioned in the cool storage material container used for the evaporator with a cool storage function of FIG. 1 and FIG. It is a figure equivalent to a part of Drawing 6 showing other modifications of an inner fin arranged in a cool storage material container used for an evaporator with a cool storage function of Drawing 1 and Drawing 2.

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

  In the following description, the downstream side in the ventilation direction (the direction indicated by the arrow X in FIGS. 1 to 3) is referred to as the front, and the opposite side is referred to as the rear. Accordingly, when viewed from the front to the rear, the top, bottom, left and right are the top, bottom, left, and right in FIG.

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

  1 and 2 show the overall configuration of an evaporator with a cold storage function according to the present invention, and FIGS. 3 to 7 show the configuration of the main part thereof.

  1 and 2, the evaporator (1) with a cold storage function is composed of an aluminum first header tank (2) and an aluminum second one arranged at intervals in the vertical direction with the longitudinal direction directed in the horizontal direction. A header tank (3) and a heat exchange core part (4) provided between both header tanks (2) and (3) are provided.

  The first header tank (2) is located on the leeward upper header part (5) located on the front side (downstream side in the ventilation direction) and on the leeward side upper header part (5) located on the rear side (upstream side in the ventilation direction). And an integrated upwind header section (6). A refrigerant inlet (7) is provided at the left end of the leeward upper header portion (5), and a refrigerant outlet (8) is provided at the left end of the leeward upper header portion (6). The second header tank (3) includes a leeward lower header portion (9) located on the front side and an upwind lower header portion (11) located on the rear side and integrated with the leeward lower header portion (9). And. The inside of the leeward side lower header portion (9) and the inside of the leeward side lower header portion (11) of the second header tank (3) are communicated by appropriate means (not shown).

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

  Aluminum in which a regenerator (not shown) is enclosed in a plurality of ventilation gaps (14) of the entire ventilation gap (14) in the heat exchange core section (4) and in the ventilation gaps (14) that are not adjacent to each other. The cold storage material container (15) is disposed so as to straddle both the front and rear refrigerant flow pipes (12). Further, the remaining ventilation gap (14) is made of an aluminum brazing sheet having a brazing filler metal layer on both sides, and has a wave crest extending in the front-rear direction, a wave bottom extending in the front-rear direction, and a connection connecting the wave crest and the wave bottom. First and second corrugated outer fins (16) are arranged so as to straddle both front and rear refrigerant flow pipes (12) to form both left and right sets (13) forming a ventilation gap (14) It is brazed (joined by a brazing material) to the refrigerant flow pipe (12). Here, the first outer fins (16) are arranged in the ventilation gaps (14) adjacent to the left and right sides of the ventilation gap (14) in which the cool storage material container (15) is arranged, and are adjacent in the left-right direction. Two first outer fins (16) are located between the cold storage material containers (15). In addition, the outer side of the set (13) of the refrigerant flow pipes (12) at the left and right ends is made of an aluminum brazing sheet having a brazing filler metal layer on both sides, and has a wave crest extending in the front-rear direction, a wave bottom extending in the front-rear direction, A corrugated second outer fin (16a) composed of a connecting portion that connects the top and the wave bottom is disposed and brazed to both the front and rear refrigerant flow pipes (12), and further, the second outer fin (16a) at both left and right ends. An aluminum side plate (17) is disposed outside and is brazed to the second outer fin (16a). An end ventilation gap (14a) is formed between the set (13) of the refrigerant flow pipes (12) at the left and right ends and the side plate (17).

  That is, the evaporator (1) with a cold storage function is a first in which a side plate (17), a second outer fin (16a), a refrigerant circulation pipe (12) set (13), and a cold storage material container (15) are continuously arranged. The arrangement part (20) is provided. The 1st arrangement part (20) is provided in the right end of the evaporator (1) with a cool storage function. In addition, at the left end of the evaporator (1) with a cold storage function, a set (13) of a side plate (17), a second outer fin (16a), a refrigerant flow pipe (12), a first outer fin (16), a refrigerant flow pipe A second arrangement portion (20a) in which the group (13) of (12) and the cold storage material container (15) are continuously arranged is provided.

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

  As shown in FIGS. 3 to 6, the cool storage material container (15) has a flat shape in which the longitudinal direction is directed in the up-down direction and the width direction is directed in the front-rear direction, and from the front side edge of the front side refrigerant circulation pipe (12). And the container body (18) brazed to the front and rear refrigerant flow pipes (12) of each set (13), and the front edge (leeward edge of the container body (18)) ), An outer projecting portion (19) provided so as to project forward (outside in the ventilation direction) from the front edge of the front refrigerant circulation pipe (12). The insides of the container main body (18) and the outward projecting portion (19) of the cold storage material container (15) are communicated with each other. The outward projecting part (19) is provided over a certain length from the upper end of the front side edge of the container body part (18), and the vertical length of the outward projecting part (19) is the container body part ( It is shorter than the vertical length of 18). Further, the outward projecting portion (19) of the cold storage material container (15) is located on the outer side in the ventilation direction from the first and second outer fins (16) and (16a), and the outward projecting portion (19) The lower edge portion (19a) is inclined downward toward the container body portion (18) (upstream side in the ventilation direction). Here, the thickness in the left-right direction of the container body (18) and the outwardly projecting portion (19) is equal.

  A plurality of condensate drainage channels (21), (22), which gradually lower from the upper end to the lower end, are spaced from each other on the outer surfaces of the left and right side walls (18a) of the container body (18) of the cool storage material container (15). Formed. Here, the first condensate drainage channel (21), which is inclined to the windward side from the upper side to the lower side, and the upper and lower sides formed at intervals in the vertical direction and inclined to the windward side from the upper side to the lower side. A second condensate drainage channel (22) comprising a vertical portion (22b) is provided through the inclined portion (22a and the upper inclined portion (22a) and the lower inclined portion (22a). The condensate drainage channel (22) is formed from the upper part to the lower part so as to include the vertical center of the container main body part (18) .The upper end of each condensate drainage channel (21) (22) is the container The lower end of the condensed water drainage channel (21) (22) opened at the upper edge or the leeward edge of the main body (18) and the upper end opened at the upper edge of the container main body (18) is the container main body (18). The lower end of the condensate drainage channel (21) (22) with the upper end opened at the leeward edge of the container body (18) opens at the lower edge of the container body (18). Each condensate drain (21) (22) , Formed on the left and right side walls (18a) of the container body (18) of the cool storage material container (15) and formed between the two protrusions (23) bulging outward, and one condensed water The length of at least one of the two protrusions (23) forming the drainage channels (21) and (22) is the ventilation of the container body (18) of the cold storage material container (15). Note that the two adjacent condensate drains (21) and (22) share the convex part (23) located between the condensate drains (21) and (22). The bulging top walls of all the convex portions (23) are flat and located on the same plane, and the flat bulging top walls of the convex portions (23) are connected to the refrigerant flow pipe (12). The condensate drainage channel (21) (22) and the convex part (23) on the left side wall (18a) of the container body (18) and the condensate drainage on the right side wall (18a) are brazed in contact. Road (21) (22) and convex part (23) are slightly displaced in the ventilation direction so that they partially overlap but do not overlap It is provided.

  In the container main body portion (18) of the cold storage material container (15), an offset aluminum inner fin (24) is disposed over substantially the entire vertical direction. The inner fin (24) includes a wave crest portion (25a) extending in the vertical direction, a wave bottom portion (25b) extending in the vertical direction, and a connecting portion (25c) connecting the wave crest portion (25a) and the wave bottom portion (25b). A plurality of corrugated strips (25) are arranged in the vertical direction and are integrally connected to each other, and are formed by connecting the corrugated strips (25a) adjacent to each other in the vertical direction. (25b) The two are displaced in the front-rear direction. The vertical lengths of the wave crest (25a), the wave bottom (25b), and the connecting portion (25c) in each corrugated strip (25) are equal. The inner fin (24) has inner surfaces of the left and right side walls (18a) of the container main body (18) of the cold storage material container (15), that is, the convex portions (23) of the left and right side walls (18a) of the container main body (18). The part which is not formed is brazed. The bulging top wall of the convex part (23) contacts the refrigerant flow pipe (12) but does not contact the inner fin (24), so each side wall of the container main body part (18) of the cold storage material container (15) (18a) is provided with a contact portion that contacts the inner fin (24) and a non-contact portion that does not contact the inner fin (24).

  The outwardly projecting portion (19) of the cool storage material container (15) swells in both the left and right directions, except for the narrow portion on the inner side (near the rear side) in the ventilation direction, and the dimensions in the left and right direction are the container body (18 ) Is larger than the horizontal dimension of the first and second outer fins 16 and 16a, and the inflating portion 26 is larger than the first and second outer fins 16 and 16a. The left and right side walls (26a) of the expansion portion (26) are flat.

  As the regenerator material filled in the regenerator material container (15), a paraffin-based latent heat regenerator material whose freezing point is adjusted to about 5 to 10 ° C is used. Specifically, pentadecane, tetradecane, or the like is used. It is preferable that the cold storage material filling ratio, which is the ratio of the volume of the enclosed cold storage material to the internal volume of the internal space of the cold storage material container (15), is 70 to 90%. Here, it is preferable that the upper end of the inner fin (24) is located above the upper end of the cool storage material enclosed in the cool storage material container (15). In this case, the cold storage material is always in contact with the inner fin both in the cold storage in which cold energy is stored in the cold storage material and in the cool discharge in which the cold energy stored in the cold storage material is discharged.

  The cold storage material is injected into the cold storage material container (15) through the cold storage material inlet (27) provided at the upper end of the outward projecting portion (19) and opened upward. The cold storage material injection port (27) is provided inside the cylindrical injection member (32) which is fixed to the upper end portion of the outward projecting portion (19) and allows the outward projecting portion (19) to communicate with the outside. The cold storage material inlet (27) is closed by crushing the upper portion of the injection member (32) after the cold storage material is injected into the cold storage material container (15). As a result, the sealing part (28) formed by closing the cold storage material inlet (27) is present at the upper end part of the outward projecting part (19). The sealing part (28) protrudes upward from the upper end of the outwardly projecting part (19), and the container main body part (18) upwards with respect to the ventilation surface (F) of the evaporator (1) with a cold storage function. In this case, it is inclined toward the leeward side (see FIG. 3).

  The strength of the cool storage material container (15) is within the normal operating environment temperature range, for example, in the range of -40 to 90 ° C, and the density of the cool storage material in the liquid phase changes and remains in the cool storage material container (15). Even if the internal pressure rises due to thermal expansion of the air being heated, the strength is designed so as not to break.

  As shown in detail in FIG. 6, the cold storage container (15) is formed by pressing aluminum brazing sheets having brazing filler metal layers on both sides, and the peripheral portions are brazed to each other 2 It is made of a substantially vertical rectangular aluminum plate (29) (31). Each aluminum plate (29) (31) includes a first bulging portion (29a) (31a) having the same bulging height forming a container body portion (18) and an outwardly projecting portion (19), and a first bulging portion. A second bulging portion (29b) (31b) provided on the bulging top wall of the bulging portion (29a) (31a) forming the container body portion (18) and serving as a convex portion (23); 3rd bulging part (29c) (31c) which is provided in the bulging top wall of the part which forms the outward projecting part (19) in 1 bulging part (29a) (31a) and forms an expanding part (26) And a semi-cylindrical fourth bulge that is provided so as to extend upwardly from the upper ends of the third bulges (29c) (31c) and communicates with the upper part of the third bulges (29c) (31c). And an exit portion (29d) (31d). Here, each aluminum plate (29) (31) is made into the 1st condensed water drainage channel (21) which exists above the vertical part (22b) of the 2nd condensed water drainage channel (22), and the 2nd condensed water. The upper mold that forms the upper slope part (22a) and the upper part of the vertical part (22b) of the drainage channel (22), and the lower slope part (22a) and the vertical part (22b) of the second condensed water drainage channel (22) If a press working is performed using a split mold consisting of a lower mold that forms the lower part and a middle mold that forms the remainder of the vertical part (22b) of the second condensate drainage channel (22), only the middle mold is replaced. By doing so, it becomes possible to form aluminum plates having different heights.

  The two swelled aluminum plates (29) and (31) are opposed to each other with the openings of the first bulging portions (29a) and (31a) sandwiched between the inner fins (24), and the fourth bulging portion ( 29d) (31d) is combined so that the small diameter portion (32a) provided at the lower portion of the injection member (32) is sandwiched, in this state the peripheral portions of both aluminum plates (29) (31), and both aluminum The cold storage material container (15) is formed by brazing the plates (29) (31) and the injection member (32). The cold storage material is injected into the cold storage material container (15) through the cold storage material injection port (27) in the injection member (32) before the upper part is crushed, and is adjacent to the vertical direction of the offset inner fin (24). The whole of the regenerator container (15) passes through the gap formed between the two corrugated strips (25). After the cold storage material is injected, the cold storage material injection port (27) is sealed by crushing the upper portion of the injection member (32), thereby forming the sealing portion (28). The cool storage material injected into the cool storage material container (15) through the cool storage material injection port (27) enters the outward projecting portion (19) and then enters the container main body portion (18). And since the lower edge part (19a) of the outward projecting part (19) is inclined downward toward the container body part (18), the cold storage material container (15) of the cold storage material container (15) is passed through the cold storage material injection port (27). The cold storage material injected into the outward projecting portion (19) is likely to flow toward the container main body portion (18).

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

  During the operation of the compressor, the cold heat of the refrigerant flowing in the refrigerant flow pipe (12) will flow into the refrigerant flow pipe (12) on the left and right side walls (18a) of the container body (18) of the cool storage material container (15). The refrigerant in the left and right side walls (18a) from the bulging top wall of the convex part (23) is transmitted directly to the cold storage material in the cold storage material container (15) through the bulging top wall of the convex part (23) attached. Cold energy is stored in the regenerator material by being transmitted to the whole regenerator material in the regenerator material container (15) through the portion not brazed to the flow pipe (12) and the inner fin (24).

  At this time, the condensed water generated on the surface of the regenerator container (15) enters the condensed water drainage channel (21) (22), and convex portions on both sides of the condensed water drainage channel (21) (22) due to surface tension ( It accumulates in the condensate drainage channel (21) (22) along 23). When the amount of accumulated condensed water increases, the gravity acting on the accumulated condensed water becomes larger than the surface tension, and flows down in the condensed water drainage channels (21) and (22) all at once. Therefore, the time for the condensed water to stay in the condensed water drainage channels (21) and (22) is shortened, and the condensed water generated on the outer surface of the cold storage material container (15) can be smoothly drained.

  When the compressor is stopped, the cold energy stored in the cold storage material in the cold storage material container (15) is transferred to the refrigerant distribution pipes on the left and right side walls (18a) of the container body (18) of the cold storage material container (15). (12) is directly transferred to the refrigerant flow pipe (12) through the bulging top wall of the convex portion (23) brazed to the refrigerant flow pipe (12) on the left and right side walls (18a) from the inner fin (24). ) Is transmitted to the refrigerant flow pipe (12) through the part not brazed and the bulging top wall of the convex part (23), and further passes through the refrigerant flow pipe (12) to store the cold in the refrigerant flow pipe (12). It is transmitted to the first outer fin (16) brazed on the opposite side to the material container (15). The cold heat transmitted to the first outer fin (16) passes through the ventilation gap (14) adjacent to the ventilation gap (14) where the cool storage material container (15) is arranged via the first outer fin (16). It is transmitted to the passing air. Moreover, in the 1st arrangement | sequence part (20), the cold energy stored in the cool storage material in a cool storage material container (15) is the right-and-left both-side wall (18a) of the container main-body part (18) of a cool storage material container (15). The refrigerant is transferred directly to the refrigerant flow pipe (12) through the bulging top wall of the projection (23) brazed to the refrigerant flow pipe (12) in the refrigerant, and from the inner fin (24) to the left and right side walls (18a). The refrigerant pipe (12) is transferred to the refrigerant pipe (12) through the bulging top wall of the convex part (23) and the part not brazed to the pipe (12), and further passes through the refrigerant pipe (12). It is transmitted to the second outer fin (16a) brazed on the opposite side to the cold storage material container (15) in 12). The cold heat transmitted to the second outer fin (16a) is transmitted to the air passing through the end ventilation gap (14a) via the second outer fin. 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 ambient temperature is higher than the normal operating environment temperature range, for example, 100 ° C., the density change of the cold storage material in the liquid phase and the thermal expansion of the air remaining in the cold storage container (15) become significant. Thus, the internal pressure of the cool storage material container (15) rises abnormally. In this case, as shown in FIG. 7, the expansion portion (26) provided in the outward projecting portion (19) of the cool storage material container (15). The left and right side walls (26a) are deformed so as to bulge outward, so that the cold storage container (15) is prevented from being damaged due to an increase in internal pressure. In addition, the strength of the outwardly projecting portion (19) projecting to the leeward side of the first and second outer fins (16) and (16a) is such that the container main body portion brazed to the refrigerant flow pipe (12) ( 18) The strength is lower than the strength of 18), so if the ambient temperature becomes even higher, the cool storage material container (15) may be damaged in the outward projecting portion (19), and the cool storage material may leak. Since the circulation pipe (12) is not affected by the damage of the cool storage material container (15), the refrigerant circulation pipe (12) is prevented from being damaged. And since the location where the cool storage material leaks is decided, the countermeasure corresponding to the leaked cool storage material can be taken comparatively easily.

  By the way, even if the regenerator material in the regenerator material container (15) is in the liquid phase, the regenerator material container (15) is obtained by the action of the connecting portion (25c) of the corrugated strip (25) of the inner fin (24). Large movement in the ventilation direction of the regenerator material is suppressed. Therefore, the generation of noise due to the large movement of the cold storage material in the cold storage material container (15) is suppressed.

  FIG. 8 shows a modification of the inner fins arranged in the cool storage material container of the evaporator with the cool storage function according to the present invention.

  The inner fin (24) shown in FIG. 8 is integrally provided with an extension part (35) extending from the container body part (18) to the outward projecting part (19).

  FIG. 9 shows another modification of the inner fin arranged in the cool storage material container of the evaporator with the cool storage function according to the present invention.

  The inner fin (40) shown in FIG. 9 is made of aluminum, and is disposed in the container main body (18) of the cold storage material container (15). The wave crest (40a) extends in the vertical direction, and extends in the vertical direction. The corrugated shape includes a wave bottom part (40b) and a connecting part (40c) connecting the wave peak part (40a) and the wave bottom part (40b). A plurality of louvers (41) extending in the left-right direction are provided in the connecting portion (40c) of the inner fin (40) at intervals in the vertical direction, thereby forming a through hole (42) in the connecting portion (40c). ing. The lengths in the vertical direction of the wave crest portion (40a), the wave bottom portion (40b), and the connecting portion (40c) in the inner fin (40) are equal.

  When the cold storage material is injected into the cold storage material container (15) provided with the inner fin (40) through the cold storage material inlet (27) in the injection member (32) before the upper part is crushed, the corrugated shape The whole of the inside of the cool storage material container (15) passes through the through hole (42) formed in the connecting portion (40c) of the inner fin (40).

  In the inner fin (40) shown in FIG. 9, instead of forming a through hole in the connecting portion (40c) by providing a louver (41), the connecting portion (40c) is partially punched to form a through hole. Also good.

  Although not shown, the inner fin (40) shown in FIG. 9 may be integrally provided with an extension (35) extending from the container body (18) to the outwardly projecting portion (19). Good.

  When the inner fins (24) and (40) shown in FIGS. 8 and 9 are used, the upper ends of the inner fins (24) and (40) are higher than the upper ends of the cool storage materials enclosed in the cool storage material container (15). It is preferable that it is located above.

  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
(12): Refrigerant distribution pipe
(13): Pair
(14): Ventilation gap
(14a): End ventilation gap
(15): Cold storage container
(16): First outer fin
(16a): Second outer fin
(20): First line
(20a): Second line-up part
(24) (40): Inner fin

Claims (5)

A plurality of flat refrigerant flow pipes whose longitudinal direction faces the up-down direction and whose width direction faces the ventilation direction are arranged in parallel at intervals in the left-right direction, and ventilation is performed between adjacent refrigerant flow pipes. A gap is formed, a cool storage material container in which a cool storage material is sealed in a plurality of ventilation gaps among all the ventilation gaps is disposed, inner fins are disposed in the cool storage material container, and the first outer space is disposed in the remaining ventilation gap. Fins are arranged and joined to the refrigerant circulation pipes, and second outer fins are arranged outside the refrigerant circulation pipes at both left and right ends and joined to the refrigerant circulation pipes by the brazing material, and outside the second outer fins at the left and right ends. An evaporator with a cold storage function in which a side plate is arranged and joined to the second outer fin by a brazing material,
The evaporator with a cool storage function provided with the part which the side plate, the 2nd outer fin, the refrigerant | coolant distribution pipe, and the cool storage material container are located in a line. The evaporator with a cool storage function according to claim 1, wherein end ventilation gaps are formed between the refrigerant flow pipes and the side plates at both left and right ends. The evaporator with a cool storage function according to claim 1 or 2, wherein the line-up portion is provided at one of left and right ends. A side plate, a second outer fin, a refrigerant circulation pipe, a first outer fin, a refrigerant circulation pipe, and a cold storage material container are continuously arranged at an end opposite to the one end where the arrangement portion is provided. The evaporator with a cool storage function of Claim 3 provided with the arrangement | positioning part. A set of a plurality of flat refrigerant flow pipes having a longitudinal direction facing the up-and-down direction and a width direction facing the ventilation direction and arranged at intervals in the ventilation direction are arranged at intervals in the left-right direction, The evaporator with a cool storage function according to any one of claims 1 to 4, wherein a ventilation gap is formed between adjacent pairs.

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