JP6205472B2 - Evaporator with cool storage function - Google Patents

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 pipe assembly consisting of two flat refrigerant flow pipes 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 apart in the ventilation direction. A cold storage material container in which a ventilation gap is formed between adjacent pipe sets, and a cold storage material is sealed in a plurality of ventilation gaps among all the ventilation gaps, is in contact with the refrigerant circulation pipe. A plurality of flow paths arranged in the ventilation direction are formed in the refrigerant flow pipe through the partition wall, inner fins are arranged in the cool storage material container, and outer fins are arranged in the remaining ventilation gaps. An evaporator with a cold storage function joined to the refrigerant flow pipe,
The cool storage material container includes a container main body portion located behind the front edge of the front refrigerant flow tube and in front of the rear edge of the rear refrigerant flow tube. Fins are placed,
The inner fin has an offset shape, and a plurality of corrugated strips each having a wave crest extending in the vertical direction, a wave bottom extending in the vertical direction, and a connecting portion that connects the wave crest and the wave bottom are arranged in the vertical direction. Formed by being connected together, and the wave crests and wave crests of two wavy strips adjacent in the vertical direction are displaced in the ventilation direction,
A plurality of condensate drainage channels having a constant channel length in the vertical direction are formed on the outer surfaces of the left and right side walls of the container body portion of the cool storage material container, and each condensate drainage channel is connected to the container body portion of the cool storage material container. The refrigerant flow pipe side in each condensate drainage channel is formed between two convex portions provided on the left and right side walls and bulging outward, and at least part of the bulge end is brazed to the refrigerant flow pipe At least a part of the total length of the opening facing is blocked by the refrigerant flow pipe,
In the closed part where the opening facing the refrigerant flow pipe side in the condensed water drainage channel is closed by the refrigerant flow pipe, there are two or more partition walls of the refrigerant flow pipe within the range of the ventilation direction of the closed part, Further, in the closed portion, the connecting portion of the inner fin is only the portion that becomes the bottom wall of the closed portion of the condensed water drainage groove on either one of the left and right side walls of the container body portion of the cold storage material container. An evaporator with a cold storage function that is attached and separated from the other side wall.

  2) The evaporator with a cool storage function according to 1) above, wherein the upper end of the inner fin is positioned above the upper end of the cool storage material enclosed in the cool storage material container.

  3) The above-described 1), wherein the regenerator container is provided with an outwardly extending portion that is connected to the leeward side edge or the windward side edge of the container main body so as to protrude outwardly in the ventilation direction from the refrigerant flow pipe. Or the evaporator with a cool storage function as described in 2).

  4) The evaporator with a cool storage function according to the above 3), wherein an extension portion extending to the outward projecting portion is integrally provided on the inner fin in the cool storage material container.

  5) The outwardly projecting portion of the regenerator container swells in at least one of the left and right directions with respect to the container main body, and the horizontal dimension is larger than the horizontal dimension of the container main body and the left and right The above-mentioned 3) or 4) in which an inflating portion having flat side walls is provided, the inflating portion is located outside the outer fin in the ventilation direction, and the left and right side walls of the inflating portion are flat. ) Evaporator with cool storage function.

  6) The outwardly projecting portion of the cool storage material container has a shorter vertical length than the vertical length of the container body, and the outwardly projecting portion corresponds to the leeward side edge or wind of the container body. The evaporator with a cold storage function according to any one of the above 3) to 5), which is provided over a certain length from the upper end of the upper edge portion.

  7) The evaporator with a cold storage function according to 6) above, wherein a lower edge portion of the outward projecting portion is inclined downward toward the container main body portion.

  8) The above-described 3) to 3), wherein a sealing part formed by closing the cool storage material inlet used to inject the cool storage material into the cool storage material container is present in the outwardly projecting part of the cool storage material container. The evaporator with a cool storage function according to any one of 7).

  9) The sealing portion is formed so as to protrude upward from the upper end of the outward projecting portion, and the sealing portion is inclined in a direction away from the container main body portion upward with respect to the ventilation surface. 8) Evaporator with cool storage function.

  10) The condensate drainage channel and the convex part on the left side wall of the container main body and the condensate drainage channel and the convex part on the right side wall are provided with a slight deviation in the ventilation direction so that they partially overlap but do not overlap the whole. The evaporator with a cold storage function according to any one of 1) to 9) above.

  According to the evaporator with a cold storage function of the above 1) to 10), the inner fin arranged in the cold storage material container connects the wave crest portion extending in the vertical direction, the wave bottom portion extending in the vertical direction, and the wave crest portion and the wave bottom portion. Since it has the connection part which performs, the big movement of the ventilation direction of the cool storage material in a cool storage material container is suppressed by the effect | action of a connection part. Therefore, generation | occurrence | production of the noise resulting from the big movement of the cool storage material in a cool storage material container is suppressed.

  According to the evaporator with a cool storage function of 1) to 10) above, for example, the cool storage material is injected into the cool storage material container through the cool storage material inlet provided in the outward projecting portion like the evaporator with the cool storage function of 8) above. Then, the whole of the inside of the cold storage material container passes through a gap formed between two corrugated strips adjacent to each other in the vertical direction of the offset inner fin.

  Further, like the evaporator with the cold storage function of 1) to 10) above, the cold storage material container is located behind the front edge of the front refrigerant flow pipe and ahead of the rear edge of the rear refrigerant flow pipe. A liquid phase comprising a container body part and an outwardly extending part that is connected to the leeward side edge or the windward side edge part of the container body part so as to project outward from the refrigerant flow pipe in the ventilation direction; The regenerator material moves not only within the container body, but also between the container body and the outward projecting part, but even in this case, the liquid-phase regenerator moves greatly due to the action of the inner fins. Can be suppressed.

  According to the evaporator with the cold storage function of 2) above, the cold storage material always contacts the inner fin both in the cold storage where the cold storage is stored in the cold storage material and in the cool discharge where the cold stored in the cold storage material is discharged. Therefore, the cold storage efficiency and the cooling efficiency are improved.

  According to the evaporator with a cool storage function of 4) above, the inner fin in the cool storage material container is integrally provided with an extension portion extending to the outward projecting portion. The cool storage material container is located behind the front edge of the front refrigerant flow pipe and forward of the rear edge of the rear refrigerant flow pipe, and the leeward edge or wind of the container main body. Even if it is provided with an outwardly extending part that is connected to the upper edge and protrudes outward from the refrigerant flow pipe in the ventilation direction, it is between the container main body part and the outwardly extending part of the liquid phase regenerator material. It is possible to effectively suppress the movement at.

  According to the evaporator with the cold storage function of 5) above, when the internal pressure of the cold storage material container is abnormally increased, the flat left and right side walls of the expansion portion of the outward projecting portion are deformed so as to expand outward, and the cold storage material container Damage due to an abnormal increase in internal pressure of the pipe is prevented.

  According to the evaporator with a cold storage function of 6) above, it becomes possible to reduce the amount of the cold storage material present in the outwardly extending portion that is not in direct contact with the refrigerant circulation pipe, and is enclosed in the cold storage material container. Moreover, the quantity of the cool storage material which is not cooled effectively among all the cool storage materials can be reduced. That is, the cold storage material filling rate which is the ratio of the volume of the enclosed cold storage material to the inner volume of the internal space of the cold storage material container and the cold storage material container is a normal operating environment temperature range, for example, −40 to 90 ° C. Within the range, the density of the cold storage material in the liquid phase changes, and even if the internal pressure rises due to the thermal expansion of the air remaining in the cold storage material container, the strength and the cold storage material filling rate will not break Designed. Since such a regenerator filling rate is naturally less than 100%, a space near the upper end in the regenerator container has a space where no regenerator material exists, and the leeward side edge of the container body part Or all the inside of the outward projecting part provided over a fixed length from the upper end of the windward edge is not filled with the cold storage material. As a result, the amount of the regenerator material that is not effectively cooled among all the regenerator materials enclosed in the regenerator material container can be reduced.

  According to the evaporator with the cold storage function of 7) above, when the cold storage material is injected into the cold storage material container through the cold storage material inlet provided in the outward projecting portion, for example, as in 8) above, the cold storage material is stored in the container. It becomes easy to flow to the main body side, and the regenerator material can be quickly poured into the regenerator container.

  According to the evaporator with the cold storage function of 9), the workability when the cold storage material is injected into the cold storage material container through the cold storage material inlet and the workability when the cold storage material inlet is sealed are improved.

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 cool storage material container used for the evaporator with a cool storage function of FIG. 1 and FIG.

  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 pipe sets (13) composed 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 ones of the pipe assembly (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). In the refrigerant flow pipe (12), a plurality of flow paths (12a) arranged in the front-rear direction are formed via a partition wall (12b) (see FIG. 4).

  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 container (15) is disposed so as to straddle and contact both the front and rear refrigerant flow pipes (12) constituting each pipe assembly (13). 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. The corrugated outer fins (16) made up of the front and rear refrigerants are arranged so as to straddle the front and rear refrigerant flow pipes (12) to form the left and right pipe assemblies (13) forming the ventilation gap (14). It is brazed to the distribution pipe (12). Here, the outer fins (16) are respectively arranged in the ventilation gaps (14) adjacent to the left and right sides of the ventilation gap (14) where the cold storage material container (15) is arranged, and the cold storage materials adjacent in the left-right direction are arranged. Two outer fins (16) are located between the containers (15). In addition, outer fins (16) made of an aluminum brazing sheet having brazing filler metal layers on both sides are also arranged outside the pipe assembly (13) of the refrigerant flow pipes (12) at both left and right ends, and both the front and rear refrigerant flow pipes (12) Further, an aluminum side plate (17) is disposed outside the outer fins (16) at both left and right ends, and is brazed to the outer fins (16).

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

  As shown in FIGS. 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 a container body portion brazed to the two front and rear refrigerant flow pipes (12) of each pipe assembly (13), and located rearward and forward of the rear edge of the rear refrigerant flow pipe (12). 18) and a part of the front side edge (leeward side edge) of the container body (18), in this case, connected to only the upper part and stretched forward (outer in the ventilation direction) than the front side edge of the front refrigerant flow pipe (12) It consists of the outward projecting part (19) provided so that it may protrude. 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 outwardly projecting portion (19) of the cold storage material container (15) is located on the outer side of the outer fin (16) in the ventilation direction, and the lower edge portion (19a) of the outwardly projecting portion (19) is It inclines downward toward the container body (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. An inclined portion (22a) and a second condensate drainage channel (22) comprising a vertical portion (22b) passing through the lower end of the upper inclined portion (22a) and the upper end of the lower inclined portion (22a) are provided. . The 2nd condensed water drainage channel (22) is formed from the upper part to the lower part so that the central part of the up-and-down direction of the container main-body part (18) may be included. The upper end of each condensate drainage channel (21) (22) opens to the upper edge or leeward side edge of the container body (18), and the upper end opens to the upper edge of the container body (18). (21) (22) The lower end of the condensate drainage channel (21) (22) opens at the leeward edge of the container body (18) and the upper end opens at the leeward edge of the container body (18). The lower end of the container is opened at the lower edge of the container body (18). Each condensate drainage channel (21), (22) is provided on the left and right side walls (18a) of the container body (18) of the cold storage material container (15) and has two protrusions (23) bulging outward. The length of at least one of the two protrusions (23) that form one condensate drainage channel (21) (22) is as follows: It is longer than the width in the ventilation direction of the container body (18) of (15). Two adjacent condensate drains (21), (22) share a convex portion (23) located between the two condensate drains (21), (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 in contact with the refrigerant flow pipe (12). It is brazed. Therefore, at least a part of the total length of the opening facing the refrigerant flow pipe (12) side in both condensed water drainage channels (21) and (22) is closed by the refrigerant flow pipe (12). A closed portion where the opening is blocked by the refrigerant flow pipe (12) in both the condensed water drainage channels (21) and (22) is indicated by (40). Condensate drainage channels (21), (22) and projections (23) on the left side wall (18a) of the container body (18) and condensate drainage channels (21) (22) and projections on the right side wall (18a) (23) is provided with a slight deviation in the ventilation direction so as to partially overlap but not entirely overlap.

  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).

  As shown in FIG. 4, in the condensate drainage channel (21) (22), the opening facing the refrigerant flow pipe (12) side is blocked by the refrigerant flow pipe (12). Two or more partition walls (12b) of the refrigerant flow pipe (12) exist within the range of the portion (40) in the ventilation direction. Further, in the closed portion (40), the connecting portion (25c) of the corrugated strip (25) of the inner fin (24) is a condensed water drainage channel on one of the side walls (18a). (21) Brazed only to the bottom wall of the closed portion (40) of (22), and is separated from the other side wall (27).

  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 left-right dimension, and the inflated part (26) is located on the outside in the ventilation direction (downstream in the ventilation direction) with respect to the outer fin (16). At the same time, the left and right side walls (26a) of the expanding 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, the upper end of the inner fin (24) is preferably located above the upper end (P) 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 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 ( 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 through the refrigerant flow pipe (12), heat exchange is performed with the air passing through the ventilation gap (14), 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 outer fin (16) brazed on the opposite side to the material container (15). And it is transmitted to the air which passes the ventilation gap (14) of the both sides of the ventilation gap (14) where the cool storage material container (15) is arrange | positioned through an outer fin (16). 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. Moreover, the strength of the outwardly projecting portion (19) that projects to the leeward side of the outer fin (16) is lower than the strength of the container body (18) that is brazed to the refrigerant flow pipe (12). If the ambient temperature becomes even higher, the cool storage material container (15) may be damaged in the outwardly projecting portion (19) and the cool storage material may leak, but the refrigerant flow pipe (12) Since the container (15) is not affected by the damage, 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).

  Also when the inner fin (24) shown in FIG. 8 is used, 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). .

  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): Tube assembly
(14): Ventilation gap
(15): Cold storage container
(16): Outer fin
(18): Container body
(19): Outward projecting part
(19a): Lower edge
(24): Inner fin
(25): Wavy strip
(25a): Wave peak
(25b): Wave bottom
(25c): Connection part
(26): Expansion part
(26a): Left and right side walls
(27): Cold storage material inlet
(28): Sealing part
(35): Extension
(40): Blocked part

Claims (10)

A pipe assembly composed of two flat refrigerant flow pipes with the longitudinal direction facing the up-down direction and the width direction facing the ventilation direction and spaced apart in the ventilation direction is spaced apart in the left-right direction of the refrigerant flow pipe. The refrigerant storage pipes are arranged in a parallel manner, a ventilation gap is formed between adjacent pipe sets, and a cool storage material container in which a plurality of ventilation gaps are enclosed in a plurality of ventilation gaps is filled with a cold storage material. Are arranged in contact with each other, a plurality of flow paths arranged in the ventilation direction are formed in the refrigerant flow pipe via partition walls, inner fins are arranged in the cool storage material container, and outer fins are arranged in the remaining ventilation gaps And an evaporator with a cold storage function joined to the refrigerant flow pipe,
The cool storage material container includes a container main body portion located behind the front edge of the front refrigerant flow tube and in front of the rear edge of the rear refrigerant flow tube. Fins are placed,
The inner fin has an offset shape, and a plurality of corrugated strips each having a wave crest extending in the vertical direction, a wave bottom extending in the vertical direction, and a connecting portion that connects the wave crest and the wave bottom are arranged in the vertical direction. Formed by being connected together, and the wave crests and wave crests of two wavy strips adjacent in the vertical direction are displaced in the ventilation direction,
A plurality of condensate drainage channels having a constant channel length in the vertical direction are formed on the outer surfaces of the left and right side walls of the container body portion of the cool storage material container, and each condensate drainage channel is connected to the container body portion of the cool storage material container. The refrigerant flow pipe side in each condensate drainage channel is formed between two convex portions provided on the left and right side walls and bulging outward, and at least part of the bulge end is brazed to the refrigerant flow pipe At least a part of the total length of the opening facing is blocked by the refrigerant flow pipe,
In the closed part where the opening facing the refrigerant flow pipe side in the condensed water drainage channel is closed by the refrigerant flow pipe, there are two or more partition walls of the refrigerant flow pipe within the range of the ventilation direction of the closed part, Further, in the closed portion, the connecting portion of the inner fin is only the portion that becomes the bottom wall of the closed portion of the condensed water drainage groove on either one of the left and right side walls of the container body portion of the cold storage material container. An evaporator with a cold storage function that is attached and separated from the other side wall. The evaporator with a cool storage function according to claim 1, wherein an upper end of the inner fin is positioned above an upper end of the cool storage material enclosed in the cool storage material container. The cool storage material container includes an outward projecting portion provided so as to project outward from the refrigerant flow pipe in the ventilation direction in connection with the leeward edge or the windward edge of the container main body. Evaporator with cold storage function described. The evaporator with a cool storage function according to claim 3, wherein an extension portion extending to the outward projecting portion is integrally provided on the inner fin in the cool storage material container. The outwardly projecting portion of the cool storage material container swells in at least one of the left and right directions with respect to the container main body, and the left and right dimensions are larger than the left and right dimensions of the container main body and the left and right side walls. An inflatable portion is provided, the inflatable portion is located outside the outer fin in the ventilation direction, and the left and right side walls of the inflatable portion are flat. Evaporator with cool storage function. The outwardly projecting portion of the cool storage material container has a length in the vertical direction that is shorter than the length in the vertical direction of the container body, and the outwardly projecting portion is the leeward edge or windward edge of the container body The evaporator with a cool storage function according to any one of claims 3 to 5, wherein the evaporator is provided over a certain length from an upper end of the unit. The evaporator with a cool storage function according to claim 6, wherein a lower edge portion of the outward projecting portion is inclined downward toward the container main body portion. The sealing part formed by closing the cool storage material inlet used for inject | pouring a cool storage material in a cool storage material container exists in the outward projecting part of a cool storage material container of Claims 3-7 The evaporator with a cool storage function as described in any one of them. The said sealing part is protruded and formed upward from the upper end of an outward projecting part, and the said sealing part inclines in the direction away from a container main-body part toward upper direction with respect to a ventilation surface. Evaporator with cold storage function described. The condensate drainage channel and the convex part on the left side wall of the container main body and the condensate drainage channel and the convex part on the right side wall are provided with a slight deviation in the ventilation direction so that they partially overlap but do not overlap all over. The evaporator with a cool storage function in any one of Claims 1-9.

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