JP6286184B2 - 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 stated that a plurality of flat refrigerant flow pipes whose longitudinal direction faces the vertical direction and whose width direction faces the ventilation direction are spaced apart in the thickness direction of the refrigerant flow pipe. Arranged in parallel, a gap is formed between adjacent refrigerant flow pipes, a regenerator container in which a regenerator material is sealed in a part of the whole gap and a plurality of gaps is disposed, and the remaining Fins are arranged in the gap and joined to the refrigerant flow pipe, and the cold storage container is composed of two metal plates joined together. At least one of the two metal plates is attached to the cold storage container. An evaporator with a cold storage function has been proposed in which a cold storage material enclosing portion is provided by bulging outward, and the vertical lengths of both metal plates are equal (see Patent Document 1). In the evaporator with a cool storage function described in Patent Document 1, the two metal plates constituting the cool storage material container are formed by pressing the metal base plate using a dedicated mold.

  However, in the case of the evaporator with a cool storage function described in Patent Document 1, it is necessary to prepare a plurality of types of metal plates with different heights in order to produce a plurality of types of evaporators with different heat storage functions. A plurality of types of dedicated dies that are formed by press working are also required.

JP 2012-42167 A

  The objective of this invention is providing the evaporator with a cool storage function which can further reduce manufacturing cost.

  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 thickness direction of the refrigerant flow pipe, and adjacent refrigerant flow A gap is formed between the pipes, a cool storage material container in which the cool storage material is sealed in a part of the entire gap and a plurality of gaps is arranged, and fins are placed in the remaining gaps to join the refrigerant flow pipe. The cool storage material container is composed of two metal plates joined to each other, and the cool storage material container is made to bulge out at least one of the two metal plates outward from the cool storage material container. Is an evaporator with a cold storage function,
At least one of the upper and lower end portions of either one of the two metal plates constituting the cold storage material container is at least one of the upper and lower end portions of the other second metal plate. It protrudes outward in the vertical direction from the one end, and the vertical outward protrusion is located between the refrigerant flow pipes on both sides of the cold storage material container, and is more vertically outward than the second metal plate of the first metal plate. The outward projecting portion projecting in the direction is provided with a plurality of air vent suppression portions projecting toward the refrigerant circulation pipe located on both sides of the cold storage material container, and the projecting end portions of at least some of the air vent suppression portions are An evaporator with a cold storage function joined to the refrigerant flow pipe.

2) The airflow suppression part is composed of ridges whose longitudinal direction is directed in the vertical direction, and a plurality of airflow suppression parts are provided at intervals in the ventilation direction, and all the ridges are in the vertical direction on the outward protrusions. A plurality of pairs of slits, each having two slits extending in the ventilation direction and spaced apart in the direction of ventilation, are formed, and between the two slits of each slit pair in the outward projecting portion of the first metal plate The evaporator with a cold storage function according to the above 1), which is provided by projecting this portion toward the refrigerant flow pipe side.

3) 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 thickness direction of the refrigerant flow pipe, and adjacent refrigerant flow A gap is formed between the pipes, a cool storage material container in which the cool storage material is sealed in a part of the entire gap and a plurality of gaps is arranged, and fins are placed in the remaining gaps to join the refrigerant flow pipe. The cool storage material container is composed of two metal plates joined to each other, and the cool storage material container is made to bulge out at least one of the two metal plates outward from the cool storage material container. Is an evaporator with a cold storage function,
At least one of the upper and lower end portions of either one of the two metal plates constituting the cold storage material container is at least one of the upper and lower end portions of the other second metal plate. It protrudes outward in the vertical direction from the one end, and the vertical outward protrusion is located between the refrigerant flow pipes on both sides of the cold storage material container, and is more vertically outward than the second metal plate of the first metal plate. A refrigerant gap is formed between the outward projecting portion projecting outward and the refrigerant flow pipes on both sides of the cool storage material container, and the coolant flow located on both sides of the cool storage material container in the outward projecting portion of the first metal plate An evaporator with a cold storage function, in which a plurality of heat transfer promotion portions protruding toward the tube side are provided, and at least a protruding end portion of the heat transfer promotion portion is joined to the refrigerant flow tube.

4) The heat transfer promoting part is composed of a cup-shaped convex part formed by partially bulging the outward projecting part toward the refrigerant flow pipe side, and a plurality of heat transfer promoting parts are formed on the entire outward projecting part. The evaporator with a cold storage function according to the above 3), which is provided so as to be scattered.

5) The heat transfer promotion part is composed of ridges with the longitudinal direction in the ventilation direction, a plurality of heat transfer promotion parts are provided at intervals in the vertical direction, and all the ridges are in the direction of ventilation in the outward projections. A plurality of pairs of slits each formed of two slits extending in the vertical direction are formed at intervals in the vertical direction, and between the slits of each slit pair in the outward projecting portion of the first metal plate The evaporator with a cold storage function as described in 3) above, which is provided by projecting this part toward the refrigerant flow pipe side.

6) The evaporator with a cold storage function according to 5) above, wherein the protrusions serving as the heat transfer promoting portion have a V-shaped cross section, and a plurality of through holes are formed in two wall portions forming the heat transfer promoting portion.

7) The evaporator with a cold storage function according to any one of 1) to 6) , wherein only the lower end portion of the first metal plate protrudes downward from the lower end portion of the second metal plate.

According to the evaporator with a cold storage function of 1) to 7) above, at least one of the upper and lower end portions of either one of the two metal plates constituting the cold storage material container is the same. Since the second metal plate protrudes outward in the vertical direction from at least one of the upper and lower end portions of the second metal plate, even if a plurality of types of evaporators with a cold storage function having different heights are formed, the second As the metal plate, one common to all types of evaporators with a cold storage function can be used. Therefore, compared with the case where the evaporator with a cool storage function described in Patent Document 1 is manufactured, the number of types of press working molds to be prepared is small, and as a result, the manufacturing cost of the evaporator with a cool storage function can be further reduced.

  In addition, the first metal plate is pressed using a split die composed of a first die that forms a portion to be joined to the second metal plate and a second die that forms an outward projection. In this case, it is possible to form a plurality of types of first metal plates having different heights by exchanging only the second mold.

According to the evaporator with a cold storage function of 1) and 2) above, the gap between the outward projection of the first metal plate of the cold storage material container and the refrigerant flow pipes on both sides of the cold storage material container is in operation. Therefore, it is possible to suppress a decrease in the air flowing through the gap where the fins are arranged. Therefore, it is possible to suppress a decrease in heat exchange performance during operation of the compressor.

According to the evaporator with the cold storage function of 3) to 6) above, when the compressor is operated, the first metal plate protrudes outward from the second metal plate in the vertical direction, and both sides of the cold storage material container. The air flows through the ventilation gap formed between the refrigerant flow pipe and the air, and heat transfer between the air and the refrigerant flowing through the refrigerant flow pipe is promoted. Therefore, the air flowing through the ventilation gap can be used for cooling, and the cooling performance can be improved.

According to the evaporator with a cold storage function of 5) above, the following effects can be obtained by appropriately adjusting the interval between the upper and lower ridges. That is, as in 7) above, when the lower end of the first metal plate protrudes below the lower end of the second metal plate, it is cooled by the refrigerant flowing in the refrigerant flow pipe when the compressor is operating. As a result, condensed water is generated on the surface of the cool storage material container, and the condensed water flows down to the outward projecting portion of the first metal plate, and is drained after collecting between adjacent heat transfer promoting portions due to surface tension. . Therefore, immediately after the compressor is stopped, a relatively large amount of condensed water is stored between the heat transfer promoting portions of the outward projecting portions, and the cold heat as the sensible heat of the condensed water is Then, the air is transmitted to the air passing through the ventilation gap formed between the outward projecting portion and the refrigerant circulation pipes on both sides of the cold storage material container, and the air is cooled. As a result, the condensed water contributes to prevention of a rapid decrease in cooling capacity.

It is the perspective view which abbreviate | omitted one part 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. FIG. 4 is an enlarged sectional view taken along line B-B in FIG. 3. 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. It is a figure equivalent to a part of FIG. 3 which shows the modification of the cool storage material container used for the evaporator with a cool storage function of FIG. 1 and FIG. FIG. 9 is an enlarged sectional view taken along the line CC in FIG. 8. It is a figure equivalent to a part of Drawing 3 showing other modifications of a cool storage material container used for an evaporator with a cool storage function of Drawing 1 and Drawing 2. It is the DD sectional view taken on the line of 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.

  Moreover, the same code | symbol is attached | subjected to the same thing and the same part through all drawings, and the overlapping description is abbreviate | omitted.

  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.

  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 gap (14A) (14B) 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).

  A part of the total gap (14A) (14B) in the heat exchange core section (4) and a plurality of gaps (14A) that are not adjacent to each other, in the gap (14A), a cold storage material (not shown) ) Is placed so as to straddle both the front and rear refrigerant flow pipes (12). In addition, the remaining gap (14B) 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 connecting part that connects the wave crest and the wave bottom. The corrugated outer fins (16) are arranged so as to straddle the front and rear refrigerant flow pipes (12) to form a gap (14B) and form a gap (14B). It is brazed to 12). Here, outer fins (16) are respectively disposed in the gaps (14B) adjacent to the left and right sides of the gap (14A) where the cold storage material container (15) is disposed, and the cold storage material containers ( Two outer fins (16) are located between 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 set (13) of the refrigerant flow pipes (12) at both left and right ends, and the front and rear refrigerant flow pipes (12). An aluminum side plate (17) is disposed outside the outer fins (16) at both left and right ends and 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 7, the regenerator 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 flow 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 interiors of the container body (18) and the outwardly projecting portion (19) of the cold storage material container (15) are communicated with each other, so that a hollow cold storage material enclosure (15a) is provided in the cold storage material container (15). ) Is formed. 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). Note that the container body portion (18) and the outwardly projecting portion (19) have the same thickness in the left-right direction.

  A plurality of condensate drains (21) that gradually lower from the upper end to the lower end and open at both upper and lower ends are formed on the outer surfaces of the left and right side walls (18a) of the container main body (18) of the cold storage material container (15). It is formed at intervals. Each condensate drainage channel (21) is provided between two convex portions (23) provided on the left and right side walls (18a) of the container body (18) of the cold storage material container (15) and bulging outward. The two adjacent condensate drains (21) that are formed share a convex portion (23) located between the two condensate drains (21). 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. The condensate drainage channel (21) and the convex portion (23) of the left side wall (18a) of the container body (18) and the condensate drainage channel (21) and the convex portion (23) of the right side wall (18a) are: A portion overlaps but is slightly shifted in the ventilation direction so as not to overlap the whole.

  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).

  In the outwardly projecting portion (19) of the cold storage material container (15), the inflating portion (19a) swells in both the left and right directions and the dimension in the left and right direction is larger than the dimension in the left and right direction of the container body portion (18). Is provided, and the expansion part (19a) is located on the outer side in the ventilation direction (downstream side in the ventilation direction) than the outer fin (16).

  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 a cylindrical injection member (22) that is fixed to the upper end portion of the outward projecting portion (19) and communicates the outward projecting portion (19) to the outside. The cold storage material inlet (27) is closed by crushing the upper part of the injection member (22) 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 outward projecting part (19), and is separated from the container main body part (18) upward with respect to the ventilation surface of the evaporator with a cold storage function (1). Inclined in the direction, here on the leeward side.

  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. 7, the cold storage material container (15) is formed by pressing aluminum brazing sheets having brazing material layers on both sides, and the peripheral portions are brazed to each other 2 Aluminum plate (29) (31) (metal plate) of approximately vertical rectangular shape, and in the regenerator container (15), at least one of the aluminum plates (29) (31) and at least one aluminum plate (29) The cold storage material enclosure part (15a) is provided by bulging (31) outward. In this embodiment, each aluminum plate (29) (31) is provided with a first bulging portion (29a) (31a) having the same bulging height forming the container main body portion (18) and the outwardly projecting portion (19). ) And the second bulging portion (29b) (29b) which is provided on the bulging top wall of the portion forming the container main body portion (18) in the first bulging portion (29a) (31a) and becomes the convex portion (23) 31b) and a third bulging portion (31a) provided on the bulging top wall of the portion of the first bulging portion (29a) (31a) forming the outward projecting portion (19) and forming the expanding portion (19a) 29c) (31c) and a semi-cylinder provided to extend upwardly from the upper ends of the third bulges (29c) (31c) and to communicate with the upper part of the third bulges (29c) (31c) 4th bulging part (29d) (31d) of a shape is provided.

  Of the two aluminum plates (29) and (31), at least one of the upper and lower ends of the first aluminum plate (29), only the lower end here is the other second aluminum plate. Projecting downward (upward and downward) from the lower end of (31). A downward protruding portion (vertical protruding portion in the vertical direction) of the first aluminum plate (29) is indicated by (32). Refrigerant flow pipes (on the left and right sides of the cool storage material container (15)) are formed on the downward projecting portion (32) of the first aluminum plate (29), and are formed with ridges having a V-shaped cross section with the longitudinal direction directed vertically. 12) A plurality of wind passage suppression portions (33) and (34) protruding toward the side are provided at intervals in the ventilation direction. At least a part of the all-ventilation suppressing portions (33) and (34), here, the protruding end portions of all the air-flow suppressing portions (33) and (34) are brazed to the refrigerant flow pipe (12). That is, the first aluminum plate (29) is brazed to the downwardly projecting portion (32) of the left side set (13) of the refrigerant flow pipe (12) projecting leftward and the projecting end portion forming the gap (14A). The air vent suppression portion (33) that is made to be brazed to the refrigerant flow pipe (12) of the right set (13) that protrudes to the right and the protruding end portion forms the gap (14A) ( 34) are alternately arranged in the direction of ventilation. Each of the airflow suppressing portions (33) and (34) is composed of two slits (35) extending in the ventilation direction and spaced apart in the vertical direction on the downward projecting portion (32) of the first aluminum plate (29). A plurality of pairs of slit pairs are formed at intervals in the ventilation direction, and the portion between the slits (35) of each slit pair in the downward projecting portion (32) is connected to the left or right refrigerant flow pipe (12) side. It is provided by bending and projecting in a letter shape.

  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) and 31d are combined so that the small diameter portion (22a) provided at the lower portion of the injection member (22) is sandwiched, and in this state, the first bulge portions (29a) in both aluminum plates (29) (31) ) (31a) and the aluminum plate (29) (31) and the pouring member (22) are brazed to form a cold storage material container (15). The cold storage material is injected into the cold storage material enclosure (15a) of the cold storage material container (15) through the cold storage material inlet (27) in the injection member (22) before the upper part is crushed, and the offset inner fin ( It spreads throughout the cool storage material enclosure (15a) through a gap formed between two corrugated strips (25) adjacent in the vertical direction of 24). 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 (22), thereby forming the sealing portion (28).

  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 the evaporator with the cold storage function (1) Enters the leeward upper header portion (5) and flows out from the refrigerant outlet (8) of the leeward upper header portion (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 gap (14B), 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 downward projecting portion (32) of the first aluminum plate (29) of the cool storage material container (15) and the cool storage material container (15) are arranged by the action of the wind vent suppressing portion (33) (34). The outer fin (16) is arranged because it is possible to prevent a large amount of air from passing through the gap between the refrigerant flow pipes (12) constituting the pair (13) on both the left and right sides of the gap (14A). It is possible to suppress a decrease in the air flowing through the gap (14B), and a decrease in heat exchange performance can be suppressed.

  Also, the condensed water generated on the surface of the regenerator container (15) enters the condensed water drainage channel (21), and along the convex portions (23) on both sides of the condensed water drainage channel (21) due to surface tension. It collects in the condensed water drainage channel (21). When the amount of accumulated condensate increases, the gravity acting on the accumulated condensate becomes greater than the surface tension and flows down in the condensate drainage channel (21), and the outwardly protruding portion of the first aluminum plate (29) It drains downward through (32).

  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 gap | interval (14B) of the both sides of the gap | interval (14A) 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.

  8 and 9 show a modification of the cool storage material container used in the evaporator with the cool storage function according to the present invention.

  The lower protrusion (32) of the first aluminum plate (29) constituting the regenerator container (40) shown in FIGS. 8 and 9 is partially provided on both sides of the regenerator container (15). The heat transfer facilitating portions (41) and (42) formed of cup-shaped convex portions formed by swelling to the refrigerant flow pipe (12) side located at Are provided in plurality. At least a part of all the heat transfer promotion parts (41) and (42), here, the protruding end parts of some of the heat transfer promotion parts (41) and (42) are brazed to the refrigerant flow pipe (12). . That is, a heat transfer promoting part (41) composed of a cup-shaped convex part projecting to the left and a cup-shaped convex part projecting to the right are formed on the lower projecting part (32) of the first aluminum plate (29). The heat promotion parts (42) are provided so as to be scattered all over the downward projecting part (32). A gap between the downward projecting portion (32) and the refrigerant flow pipe (12) located on both sides of the cool storage material container (15) is a ventilation gap (43).

  In the case of the evaporator with the cold storage function provided with the cold storage material container (40) shown in FIGS. 8 and 9, when the compressor is operated, the refrigerant flowing through the refrigerant flow pipe (12) and the air flowing through the ventilation gap (43) Heat exchange is performed between them, and the low-temperature air that is cooled while passing through the ventilation gap (43) is also provided for cooling in the passenger compartment. Therefore, the cooling capacity is improved.

  Further, when the compressor is stopped, the cold energy stored in the cold storage material in the cold storage material container (15) is converted into the downward projecting portion (32) and the heat transfer promotion portion (41) (42) of the first aluminum plate (29). Then, the air is transmitted to the air passing through the ventilation gap (43), and the air is cooled. Therefore, the downward projecting portion (32) and the heat transfer promoting portions (41), (42) contribute to prevention of a rapid decrease in cooling capacity.

  In addition, cold storage of the cold storage material at the time of operation of the compressor, drainage of condensed water generated on the surface of the cold storage material container (40), outer fins of the cold heat stored in the cold storage material when the compressor is stopped ( Heat transfer to the air flowing through the gap (14B) in which 16) is arranged is performed in the same manner as in the above-described embodiment.

  10 and 11 show a modification of the cool storage material container used in the evaporator with the cool storage function according to the present invention.

  10 and FIG. 11, the first aluminum plate (29) constituting the cold storage material container (50) shown in FIG. And the heat transfer promotion part (51) (52) projecting toward the refrigerant circulation pipe (12) located on both sides of the cold storage material container (15) and projecting end parts brazed to the refrigerant circulation pipe (12), A plurality are provided at intervals in the vertical direction. That is, the first aluminum plate (29) is brazed to the downwardly projecting portion (32) of the left side set (13) of the refrigerant flow pipe (12) projecting leftward and the projecting end portion forming the gap (14A). And the heat transfer promotion part (51) that is brazed to the refrigerant flow pipe (12) of the right set (13) that protrudes to the right and forms the gap (14A). 52) are arranged alternately in the vertical direction. Each heat transfer promotion part (51) (52) consists of two slits (53) extending in the ventilation direction formed at intervals in the ventilation direction on the downward projecting part (32) of the first aluminum plate (29). A plurality of pairs of slits are formed at intervals in the vertical direction, and the portion between the slits (53) of each slit pair in the downward projecting portion (32) is connected to either the left or right refrigerant flow pipe (12) side. It is provided by bending and projecting in a letter shape. A gap between the downward projecting portion (32) and the refrigerant flow pipe (12) located on both sides of the cool storage material container (15) is a ventilation gap (54). The two walls (51a) (52a) forming the heat transfer promoting portions (51) (52) are formed so as to be dotted with a plurality of through holes (55).

  In the case of the evaporator with the cold storage function provided with the cold storage material container (50) shown in FIGS. 10 and 11, when the compressor is operated, the refrigerant flowing in the refrigerant flow pipe (12) and the air flowing in the ventilation gap (54) Heat exchange is performed between them, and the low-temperature air cooled while passing through the ventilation gap (54) is also used for cooling the passenger compartment. Therefore, the cooling capacity is improved.

  Further, during the operation of the compressor, the condensed water generated on the surface of the cool storage material container (50) by being cooled by the refrigerant flowing in the refrigerant flow pipe (12) enters the condensed water drainage channel (21), and the surface It accumulates in the condensed water drainage channel (21) along the convex portions (23) on both sides of the condensed water drainage channel (21) by tension. When the amount of accumulated condensate increases, the gravity acting on the accumulated condensate becomes greater than the surface tension, and flows down in the condensate drainage channel (21) to the downward projecting portion of the first aluminum plate (29) ( 32), the heat transfer promotion portions (51) and (52) adjacent to each other due to surface tension, and the two walls (51a) and (52a) forming each heat transfer promotion portion (51) and (52) are relatively It drains after it accumulates a lot. Therefore, the condensed water generated on the surface of the cold storage material container (15) will be drained after collecting a relatively large amount in the downward protrusion (32), and immediately after the compressor stops, the downward protrusion ( Cold heat as sensible heat of the condensed water held in 15) is transmitted to the air passing through the ventilation gap (54) through the heat transfer promoting portions (51) and (52), and the air is cooled. As a result, the condensed water contributes to prevention of a rapid decrease in cooling capacity.

  When the compressor is stopped, the cold energy stored in the regenerator material in the regenerator container (50) passes through the lower protruding portion (32) and the heat transfer promoting portion (51) (52) of the first aluminum plate (29). It is transmitted to the air passing through the ventilation gap (54), and the air is cooled. Therefore, the downward projecting portion (32) and the heat transfer promoting portions (51) and (52) contribute to prevention of a rapid decrease in cooling capacity.

  In addition, cold storage of the cold storage material at the time of operation of the compressor, drainage of condensed water generated on the surface of the cold storage material container (50), outer fins of the cold heat stored in the cold storage material when the compressor is stopped ( Heat transfer to the air flowing through the gap (14B) in which 16) is arranged is performed in the same manner as in the above-described embodiment.

  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
(14A) (14B): Ventilation gap
(15): Cold storage container
(15a): Cooling material enclosure
(16): Outer fin
(29): 1st aluminum plate
(31): Second aluminum plate
(32): Downward protrusion (outward protrusion)
(33) (34): Wind draft suppression part
(35): Slit
(40): Cold storage container
(41) (42): Heat transfer promotion part
(43): Ventilation gap
(50): Cold storage container
(51) (52): Heat transfer promotion part
(51a) (52a): Wall
(53): Slit
(54): Ventilation gap
(55): Hole

Claims (7)

A plurality of flat refrigerant flow pipes whose longitudinal direction faces the vertical direction and whose width direction faces the ventilation direction are arranged in parallel at intervals in the thickness direction of the refrigerant flow pipe, and adjacent refrigerant flow pipes A gap is formed between them, a cool storage material container in which a cool storage material is sealed in a part of all the gaps and a plurality of gaps is disposed, and fins are disposed in the remaining gap and joined to the refrigerant flow pipe. The cool storage material container is composed of two metal plates joined to each other, and the cool storage material container is provided with a cool storage material enclosing portion by bulging at least one of the two metal plates outward. An evaporator with a cold storage function,
At least one of the upper and lower end portions of either one of the two metal plates constituting the cold storage material container is at least one of the upper and lower end portions of the other second metal plate. It protrudes outward in the vertical direction from the one end, and the vertical outward protrusion is located between the refrigerant flow pipes on both sides of the cold storage material container, and is more vertically outward than the second metal plate of the first metal plate. The outward projecting portion projecting in the direction is provided with a plurality of air vent suppression portions projecting toward the refrigerant circulation pipe located on both sides of the cold storage material container, and the projecting end portions of at least some of the air vent suppression portions are An evaporator with a cold storage function joined to the refrigerant flow pipe . The airflow suppression part is composed of ridges whose longitudinal direction is directed in the vertical direction, a plurality of airflow suppression parts are provided at intervals in the ventilation direction, and all the ridges are vertically spaced from the outward protrusions. A plurality of pairs of slits formed by two slits extending in the ventilation direction are formed at intervals in the ventilation direction, and a portion between the slits of each slit pair in the outward projecting portion of the first metal plate The evaporator with a cool storage function according to claim 1, wherein the evaporator is provided by protruding toward the refrigerant flow pipe side . A plurality of flat refrigerant flow pipes whose longitudinal direction faces the vertical direction and whose width direction faces the ventilation direction are arranged in parallel at intervals in the thickness direction of the refrigerant flow pipe, and adjacent refrigerant flow pipes A gap is formed between them, a cool storage material container in which a cool storage material is sealed in a part of all the gaps and a plurality of gaps is disposed, and fins are disposed in the remaining gap and joined to the refrigerant flow pipe. The cool storage material container is composed of two metal plates joined to each other, and the cool storage material container is provided with a cool storage material enclosing portion by bulging at least one of the two metal plates outward. An evaporator with a cold storage function,
At least one of the upper and lower end portions of either one of the two metal plates constituting the cold storage material container is at least one of the upper and lower end portions of the other second metal plate. It protrudes outward in the vertical direction from the one end, and the vertical outward protrusion is located between the refrigerant flow pipes on both sides of the cold storage material container, and is more vertically outward than the second metal plate of the first metal plate. A refrigerant gap is formed between the outward projecting portion projecting outward and the refrigerant flow pipes on both sides of the cool storage material container, and the coolant flow located on both sides of the cool storage material container in the outward projecting portion of the first metal plate An evaporator with a cold storage function, in which a plurality of heat transfer promotion portions protruding toward the tube side are provided, and at least a protruding end portion of the heat transfer promotion portion is joined to the refrigerant flow tube . The heat transfer promoting part is composed of a cup-shaped convex part formed by partially bulging the outward projecting part toward the refrigerant flow pipe side, and a plurality of heat transfer promoting parts are scattered throughout the outward projecting part. The evaporator with a cool storage function according to claim 3, wherein the evaporator is provided. The heat transfer promotion part is composed of ridges extending in the longitudinal direction in the ventilation direction, a plurality of heat transfer promotion parts are provided at intervals in the vertical direction, and all the ridges are spaced apart in the ventilation direction from the outward protrusions. A plurality of pairs of slits each formed of two slits extending in the vertical direction are formed at intervals in the vertical direction, and a portion between the slits of each slit pair in the outward projecting portion of the first metal plate The evaporator with a cool storage function according to claim 3, wherein the evaporator is provided by protruding toward the refrigerant flow pipe side . The evaporator with a cool storage function according to claim 5, wherein the ridge serving as the heat transfer promoting portion has a V-shaped cross section, and a plurality of through holes are formed in the two wall portions forming the heat transfer promoting portion . Only the lower end part of the 1st metal plate protrudes below rather than the lower end part of the 2nd metal plate, The evaporator with a cool storage function in any one of Claims 1-6 .

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