JP2012154595A - Evaporator including cold storage function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an evaporator including a cold storage function capable of extending a cooling time.SOLUTION: The evaporator 1 including a cold storage function has: a plurality of flat refrigerant flowing pipes 13 arranged at intervals while the longitudinal direction is directed in the vertical direction and the width direction is directed toward a ventilation direction; and a plurality of flat cold storage material container 16 having the longitudinal direction directed in the vertical direction and the width direction directed toward the ventilation direction, and filled with a cold storage material therein. Between adjacent refrigerant flowing pipes 13, a ventilation gap 15 is formed, and the cold storage material container 16 is arranged in some of the plurality of ventilation gaps 15 among the entire ventilation gaps 15. Both surfaces of the cold storage material container 16 is set along one side surface of the refrigerant flowing pipes 13 on both sides. Between both surfaces of the cold storage material container 16 and one side surface of the refrigerant flowing pipe 13, a water passage 23 is provided which is longer than the vertical length of the cold storage material container 16, and generates condensed water inside, and through which generated condensed water flows from an upper side to a lower side.

Description

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

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

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

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

  Therefore, in order to solve such 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 this kind of cold storage function, a pair of tanks arranged at intervals in the vertical direction, and between the two tanks, the width direction is directed in the direction of ventilation and the tanks are arranged at intervals in the length direction. And a plurality of flat refrigerant flow pipes whose both ends are respectively communicated with both tanks, and a plurality of cold storage material containers that extend in the vertical direction and are in thermal contact with the refrigerant flow pipes, An evaporator with a regenerator function is proposed in which a latent heat regenerator material is enclosed in a regenerator material container, and the regenerator material in the regenerator material container is cooled by the cold heat of the refrigerant flowing in the refrigerant distribution pipe. (See Patent Document 1).

  According to the evaporator with the cold storage function described in Patent Document 1, during normal cooling when the compressor is operating, the cold heat of the refrigerant flowing in the refrigerant distribution pipe is transmitted to the cold storage material in the cold storage material container and stored in the cold storage material. When the compressor is stopped, the cold energy stored in the cool storage material in the cool storage material container passes through the refrigerant flow pipe in which the cool storage material container is in thermal contact with the fins arranged in the ventilation gap. It is transmitted and it cools to the air which flows through the said ventilation gap from a fin.

  By the way, as a cool storage material enclosed in the cool storage material container of this kind of evaporator with a cool storage function, it is common to use the paraffin-type latent heat storage material in which melting | fusing point was adjusted to 5-10 degreeC. For example, also in the evaporator with a cool storage function described in Patent Document 1, tetradecane having a melting point of 6 ° C. is used as the cool storage material enclosed in the cool storage material container.

  However, in the evaporator with the cold storage function described in Patent Document 1, when the compressor stops, only the cold heat stored in the cold storage material in the cold storage material container is transmitted to the fins arranged in the ventilation gap, and from the fins Since it cools to the air which flows through the said ventilation gap, the cool heat stored in the cool storage material is consumed in a comparatively short time, and there is a possibility that the cool time is shortened. Moreover, since the melting | fusing point of a cool storage material is 5-10 degreeC, when the temperature of the refrigerant | coolant which flows through the inside of the refrigerant | coolant circulation pipe | tube of an evaporator becomes lower than 5 degreeC, the cold heat beyond that cannot be stored.

Japanese Patent No. 4043776

  An object of the present invention is to provide an evaporator with a cold storage function that can solve the above-described problems and extend the cooling time.

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

1) A plurality of refrigerant flow pipes that extend in the vertical direction and are arranged in parallel at intervals from each other, and a plurality of cold storage material containers that extend in the vertical direction and in which the cold storage material is enclosed, The container is disposed so that at least a part thereof is along the refrigerant flow pipe and is brought into thermal contact with the refrigerant flow pipe, and the cold storage material in the cold storage material container is cooled by the cold heat of the refrigerant flowing in the refrigerant flow pipe. In the evaporator with the cold storage function
Between the refrigerant circulation pipe and the portion along the refrigerant circulation pipe in the cold storage material container, the length of the cold storage material container is longer than the vertical direction, and the condensed water generated is generated from the top to the bottom. Evaporator with cool storage function that has a water channel to flow.

  2) The refrigerant circulation pipe and the cold storage material container are each flat in the width direction in the ventilation direction, a ventilation gap is formed between adjacent refrigerant circulation pipes, and the number of the cold storage material containers is the ventilation gap. The regenerator container is disposed in some of the plurality of ventilation gaps, and both sides of the regenerator container are arranged along one side of the refrigerant flow pipes on both sides, so that the regenerator container The evaporator with a cold storage function according to 1) above, wherein a water channel is formed between at least one surface of both surfaces and one surface of the refrigerant circulation pipe, and fins are disposed in the remaining ventilation gap.

  3) The refrigerant distribution pipe and the cold storage material container are each flat in the width direction in the ventilation direction, the cold storage material container is arranged only on one side of each refrigerant distribution pipe, and one side of the cold storage material container is refrigerant distribution A water channel is formed along one side of the pipe, between one side of the cold storage material container and one side of the refrigerant flow pipe, and the combination of the refrigerant flow pipe and the cold storage material container is perpendicular to the width direction of the refrigerant flow pipe. The evaporator with a cool storage function according to 1) above, wherein the evaporator is disposed with a gap in the direction, a gap is provided between adjacent combinations, and fins are disposed in the ventilation gap.

  4) The evaporator with the cold storage function according to any one of the above 1) to 3), wherein the water channel is provided from the upper end portion to the lower end portion of the cold storage material container, and the condensed water flows in a meandering manner. .

  5) On the surface along the refrigerant flow pipe in the cold storage material container, a plurality of water channel forming ridges whose protruding ends are in contact with one side of the refrigerant flow pipe are provided at intervals, and the water channels are formed by all the water channel forming ridges. The evaporator with a cool storage function according to any one of the above 1) to 4).

  6) On the surface along the refrigerant distribution pipe in the cool storage material container, the first water channel forming ridge inclined downward from the windward side toward the leeward side, and the second slope inclined upward from the windward side toward the leeward side Of the first water channel forming ridge, and the leeward side end and the leeward side end of the second water channel forming ridge, and the leeward side end of the second water channel forming ridge. The evaporator with a cool storage function as described in 5) above, wherein each part is displaced in the ventilation direction.

  7) It has a set consisting of a first water channel forming ridge and a second water channel forming ridge spaced immediately below the first water channel forming ridge, and the two water channels In the group consisting of the forming ridges, the windward end and the leeward end of the first waterway forming ridge are respectively more than the windward end and the leeward end of the second waterway forming ridge. The evaporator with a cold storage function as described in 6) above, located on the windward side.

  8) The surface of the cold storage material container along the refrigerant flow pipe is shorter than the two water channel forming ridges and is inclined upward and / or downward from the windward side toward the leeward side, and the protruding end is the refrigerant flow pipe. The evaporator with a cold storage function according to the above 6) or 7), wherein a plurality of short ridges that contact the surface are provided at intervals.

  9) The cold storage function according to any one of the above 1) to 8), wherein the internal spaces of at least some of the plurality of cold storage material containers are communicated with each other through the communication portion. Evaporator.

  According to the evaporator with a cold storage function of 1) to 9) above, the length of the cold storage material container is longer than the vertical length between the refrigerant distribution pipe and the portion along the refrigerant distribution pipe in the cold storage material container. Condensate is generated in the water channel during normal cooling when the compressor is operating because the water channel for generating condensed water and flowing the condensed water from top to bottom is provided. May freeze. And when the compressor stops, not only the cold heat stored in the cold storage material in the cold storage material storage part of the cold storage material enclosure, but also the cold heat as the sensible heat of the condensed water flowing through the water channel, and the condensed water in the water channel In the case of freezing, the cold heat as the latent heat of the frozen condensed water and the cold heat as the sensible heat of the condensed water flowing through the water channel after being melted are cooled down to the air flowing through the ventilation gap via the refrigerant flow pipe. The cooling time can be extended.

  Moreover, when the temperature of the refrigerant | coolant which flows through the inside of the refrigerant | coolant distribution pipe | tube of an evaporator becomes lower than 5 degreeC using the cool storage material whose melting | fusing point is 5-10 degreeC, by condensing the condensed water which generate | occur | produced in the water channel, Cold water as latent heat can be stored in the condensed water.

  According to the evaporator with a cold storage function of the above 2) and 3), it becomes easy to provide a water channel between the refrigerant circulation pipe and the portion along the refrigerant circulation pipe in the cold storage material container.

  According to the evaporator with a cold storage function of 4) above, the length of the water channel can be effectively lengthened, so that the cooling air as the sensible heat of the condensed water flowing through the water channel is passed through the refrigerant flow pipe for a long time to reduce the ventilation gap. The cooling air can be allowed to cool, and the cooling time can be extended.

  According to the evaporator with a cool storage function of 5) to 7) above, the length of the cool storage material container is longer than the vertical length of the cool storage material container between the surface along the coolant circulation pipe in the cool storage material container and one side of the coolant circulation pipe. It is possible to provide a relatively simple water channel that generates condensed water and allows the generated condensed water to flow from top to bottom.

  According to the evaporator with a cool storage function of 8), the contact area between the cool storage material container and the refrigerant circulation pipe can be increased, and the heat transfer between the cool storage and the cool is efficiently performed. Can do. Moreover, since the short ridges are inclined upward and / or downward from the windward side toward the leeward side, it is possible to prevent the inflow of the condensed water into the water channel.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. It is an AA line expanded sectional view of FIG. It is a right view which shows the cool storage material container of the evaporator with a cool storage function of FIG. It is a disassembled perspective view which shows the cool storage material container of the evaporator with a cool storage function of FIG. It is sectional drawing equivalent to FIG. 2 which shows other embodiment of the evaporator with a cool storage function of this invention.

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

  In the following description, the downstream side in the ventilation direction (the direction indicated by the arrow X in FIGS. 1 and 2) is the front, and the opposite side is the rear. Further, the left and right when viewing the rear from the front, that is, the left and right in FIG.

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

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

  In FIG. 1, an evaporator with a cold storage function (1) includes an aluminum first header tank (2) and an aluminum second header tank (3) extending in the horizontal direction and spaced apart in the vertical direction, and both headers. And a heat exchange core part (4) provided between the tanks (2) and (3).

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

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

  Cold storage in the sealed internal space (16a) in some of the plurality of ventilation gaps (15) in the heat exchange core section (4) and in the non-adjacent ventilation gaps (15) An aluminum flat cold storage container (16) in which a material (not shown) is enclosed is disposed so as to straddle the front and rear refrigerant flow pipes (13) with the width direction facing the front and rear. At least a part of both the left and right sides of the container (16) is along one side of the refrigerant flow pipes (13) on both the left and right sides. That is, the evaporator with a cold storage function (1) includes a plurality of cold storage material containers (16) whose number is smaller than the number of ventilation gaps (15). Further, in the remaining ventilation gap (15), corrugated outer fins (17) made of an aluminum brazing sheet having a brazing filler metal layer on both sides are disposed so as to straddle both the front and rear refrigerant flow pipes (13). Ventilation on both sides of the ventilation gap (15) where the cold storage material container (16) is brazed to the front and rear refrigerant flow pipes (13) constituting the pair (14) on both the left and right sides forming (15) Outer fins (17) are respectively disposed in the gaps (15). In addition, outer fins (17) made of an aluminum brazing sheet having a brazing filler metal layer on both sides are also arranged outside the set (14) of the refrigerant flow pipes (13) at the left and right ends, and the front and rear refrigerant flow pipes (13) are arranged. An aluminum side plate (18) is disposed outside the outer fins (17) at both the left and right ends and brazed to the outer fins (17).

  The cold storage material container (16) is located behind the front edge of the front refrigerant flow pipe (13) and is brazed to the two refrigerant flow pipes (13) before and after each pair (14) (21 ) And the front edge (leeward edge) of the main body (21) and the outward protrusion provided to protrude forward (outside the ventilation direction) from the front edge of the front refrigerant flow pipe (13) Part (22), and the left and right sides of the main body part (21) are respectively aligned with one side of the refrigerant flow pipe (13) on both the left and right sides.

  As shown in FIG. 3, the upper and lower sides of the cool storage material container (16) are disposed between the left and right sides along the coolant circulation pipe (13) and the coolant circulation pipe (13) in the main body (21) of the cool storage material container (16). A water channel (23) that is longer than the length of the direction and that generates condensed water inside and allows the generated condensed water to flow from top to bottom is provided. The water channel (23) is provided from the upper end portion to the lower end portion of the cold storage material container (16), and allows the condensed water to flow in a meandering manner. The water channel (23) is a first ridge for forming a water channel that is inclined downward from the windward side (front side) toward the leeward side (rear side) on the left and right sides of the main body (21) of the cold storage material container (16). (24) and second ridges (25) for forming a water channel inclined upward from the windward side toward the leeward side are provided by being alternately formed at intervals in the vertical direction. Both water channel forming ridges (24), (25) are formed by deforming the left and right side walls of the main body (21) so as to protrude outward, and both water channel forming ridges (24) The protruding end of (25) is brought into contact with the refrigerant flow pipe (13) and brazed. The windward end of the first waterway forming ridge (24) is located on the windward side of the windward end of the second waterway forming ridge (25), and the first waterway forming ridge (24) The leeward side end of the ridge (24) is located on the leeward side of the leeward side end of the second waterway forming ridge (25). That is, the main body part (21) of the cold storage material container (16) is spaced apart from the first water channel forming ridge (24) and the first water channel forming ridge (24). Of the first channel forming ridge (24) in the group consisting of the two channel forming ridges (24), (25). The windward end and the leeward end are located on the windward side of the windward end and the leeward end of the second waterway forming ridge (25), respectively. And the condensed water which flowed to the leeward side along the upper surface of the first water channel forming ridge (24) flows down from the leeward side end portion to the upper surface of the second water channel forming ridge (25). It flows to the windward side along the upper surface of the second water channel forming ridge (25), and flows down from the windward end to the upper surface of the first water channel forming ridge (24) and flows to the leeward side. By repeating, the condensed water generated in the water channel (23) flows in a meandering manner through the water channel (23) from the upper end portion to the lower end portion of the cool storage material container (16).

  Further, on both the left and right sides along the refrigerant flow pipe (13) in the main body (21) of the cool storage material container (16), it is shorter than both the water channel forming ridges (24) and (25) and extends from the windward side to the leeward side. A plurality of first short ridges (26) inclined downward and a plurality of second short ridges (27) inclined upward from the windward side toward the leeward side are respectively the main body portions ( The left and right side walls of 21) are deformed so as to protrude outward, and are provided at an interval, and the protruding ends of both short ridges (26) (27) are brought into contact with the refrigerant flow pipe (13). It is brazed. A plurality of first short ridges (26) are provided above the leeward side portion of the first water channel forming ridge (24) at intervals in the vertical direction, and the second short ridges (27) A plurality of water channel forming ridges (25) are provided above and on the windward side of the ridge (25) at intervals in the vertical direction. There are gaps between all the ridges (24), (25), (26), and (27), thereby securing a ventilation portion. Note that the protruding heights of all the ridges (24), (25), (26), and (27) are equal.

  The outwardly projecting portion (22) of the cold storage material container (16) has the vertical dimension equal to the vertical dimension of the main body (21) and the horizontal dimension is the horizontal dimension of the main body (21). It is larger than the main body part (21) and bulges outward in the left-right direction. The lateral dimension of the outward projecting part (22) is twice the pipe height, which is the lateral dimension of the refrigerant flow pipe (13), and the lateral direction of the main body part (21) of the regenerator container (16). And the height obtained by adding the protruding heights of the left and right ridges (24), (25), (26), and (27).

  In the cold storage material container (16), an aluminum inner fin (28) extending from the rear end portion of the main body portion (21) to the front end portion of the outwardly projecting portion (22) is disposed over substantially the entire vertical direction. Yes. The inner fin (28) has a corrugated shape including a wave crest extending in the front-rear direction, a wave bottom extending in the front-rear direction, and a connecting portion connecting the wave crest and the wave bottom. The fins of the inner fins (28) have the same height, and are brazed to the inner surfaces of the left and right side walls of the main body (21) of the cool storage material container (16).

  As the regenerator material filled in the regenerator material container (16), 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. Cold storage material filling rate in the cold storage material container (16) (ratio of the volume of the enclosed cold storage material to the internal volume of the sealed internal space (16a) of the cold storage material container (16)) is preferably 70 to 90%, preferably Is 70-80%.

  As shown in FIG. 4, the cold storage material container (16) is formed by pressing an aluminum brazing sheet having a brazing material layer on both sides, and the peripheral portions are brazed to each other. It consists of substantially vertical rectangular aluminum plates (29) and (31). A portion of the right aluminum plate (29) constituting the cold storage material container (16) forming the main body portion (21), that is, most of the portion excluding the front side portion, is a first bulge portion bulging rightward ( 32) is provided, and the portion that also forms the outwardly projecting portion (22), that is, the front portion, is connected to the front side of the first bulging portion (32) and bulges to the right, and the first bulging portion A second bulging portion (33) having a bulging height higher than (32) is provided over the entire length in the vertical direction. On the bulging top wall (32a) of the first bulging portion (32), both water channel forming ridges (24) and (25) and both short ridges (26) and (27) are formed. The left aluminum plate (31) constituting the cold storage material container (16) is the right aluminum plate (29) reversed in the left-right direction, and the same parts are denoted by the same reference numerals.

  Then, the two aluminum plates (29) and (31) are combined so that the openings of the first and second bulge portions (32) and (33) face each other with the inner fin (28) interposed therebetween. The cold storage material container (16) is formed by brazing in a state. Here, a main body part (21) is formed by the first bulge part (32) of both aluminum plates (29) and (31), and an outwardly projecting part (22) is formed by the second bulge part (33). ing.

  The outer fin (17) has a corrugated shape including a wave crest extending in the front-rear direction, a wave bottom extending in the front-rear direction, and a connecting portion connecting the wave crest and the wave bottom. The outer fin (17) is located behind the front edge of the front refrigerant flow pipe (13) and is finned to the refrigerant flow pipe (13) before and after each set (14) by the fin main body (34) And an outwardly extending portion (35) provided so as to extend forward of the front side edge of the rear refrigerant flow pipe (13) while continuing to the front side edge of the fin body portion (34). Then, the outwardly projecting portion (35) of the outer fin (17) disposed in the ventilation gap (15) adjacent to the ventilation gap (15) where the cold storage material container (16) is disposed is the cold storage material container (16). Are brazed to the left and right side surfaces of the outwardly projecting portion (22). An aluminum spacer (36) is disposed between the outwardly projecting portions (35) of the adjacent outer fins (17), and is brazed to the outwardly projecting portion (35).

  The evaporator with a cold storage function (1) described above includes a compressor that uses a vehicle engine as a drive source, a condenser that cools the refrigerant discharged from the compressor (refrigerant cooler), and an expansion valve that depressurizes the refrigerant that has passed through the condenser ( A refrigeration cycle is configured together with a decompressor, and is mounted as a car air conditioner on a vehicle, such as an automobile, that temporarily stops an engine that is a drive source of a compressor when the vehicle stops. When the compressor is operating, the low-pressure gas-liquid mixed-phase two-phase refrigerant compressed by the compressor and passed through the condenser and the expansion valve passes through the refrigerant inlet (7) and has an evaporator with a cold storage function ( The refrigerant enters the refrigerant inlet header part (5) of 1) and flows into the first intermediate header part (9) through the front all refrigerant circulation pipe (13). The refrigerant that has entered the first intermediate header portion (9) passes through the communication member (12), enters the second intermediate header portion (11), and then passes through the rear refrigerant flow pipe (13). It flows into the outlet header (6) and flows out from the refrigerant outlet (8). While the refrigerant flows in the refrigerant flow pipe (13), heat exchange is performed with the air passing through the ventilation gap (15), and the refrigerant flows out in a gas phase.

  At this time, the cold storage material in the main body (21) of the cold storage material container (16) is cooled by the cold heat of the refrigerant flowing in the refrigerant flow pipe (13), and further the cooled cold storage material in the main body (21) The cold heat of the air is transmitted to the regenerator material in the outwardly projecting portion (22) of the regenerator container (16) via the inner fin (28) and the air cooled by the refrigerant through the ventilation gap (15). The cold heat that has is transmitted to the cold storage material in the outwardly projecting portion (22), and as a result, cold heat is stored in the entire cold storage material in the cold storage material container (16). Further, condensed water is generated in the water channel (23) by the refrigerant flowing in the refrigerant flow pipe (13), and cold heat as sensible heat is stored in the condensed water. Further, at least part of the condensed water generated in the water channel (23) is frozen, and cold heat as latent heat is stored.

  When the compressor is stopped, the cold energy of the cool storage material in the main body (21) and the outwardly projecting portion (22) of the cool storage material container (16) is transferred to the main body (21 through the inner fin (28). ) And the left and right side walls of the outward projecting portion (22). The cold transmitted to the left and right side walls of the main body (21) passes through the refrigerant flow pipe (13) and is finned to the fin main body (34) of the outer fin (17) brazed to the refrigerant flow pipe (13). ) Is transmitted to the air passing through the ventilation gap (15) adjacent to the ventilation gap (15) where the cool storage material container (16) is disposed. The cold heat transmitted to the left and right side walls of the outward projecting part (22) passes through the outer projecting part (35) of the outer fin (17) brazed to the left and right side surfaces of the outer projecting part (22). It is cooled by the air passing through the ventilation gap (15). In addition, when the condensed water flowing through the water channel (23) is cooled as sensible heat, or when the condensed water is frozen in the water channel (23), the cold water as latent heat of ice and the condensed water flowing through the water channel after melting are sensible. Cold heat as heat passes through the refrigerant flow pipe (13), and adjacent to the ventilation gap (15) where the cold storage material container (16) is disposed via the fin body portion (34) of the outer fin (17). It is transmitted to the air passing through the ventilation gap (15). As a result, the cooling time for cooling to the air flowing through the ventilation gap (15) can be extended. 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.

  In the above embodiment, the water channel (23) is provided between both surfaces of the cool storage material container (16) and one surface of the refrigerant circulation pipe (13), but the present invention is not limited to this, and the cool storage material container A water channel (23) may be provided between one side of (16) and one side of the refrigerant flow pipe (13). In this case, on the side where the water channel (23) is not provided, the main body (21) of the regenerator container (16) is a flat surface and brazed in a state of surface contact with the refrigerant flow pipe (13). .

  FIG. 5 shows another embodiment of an evaporator with a cold storage function according to the present invention.

  In FIG. 5, the two refrigerant flow pipes (13) of each set (14) are arranged on one side of each set (14) consisting of two refrigerant flow pipes (13) at the front and rear in the heat exchange core (4), here on the left side. ), An aluminum flat cold storage container (40) in which a cold storage material (not shown) is enclosed in a sealed internal space (40a) is placed with the width direction facing the front-rear direction. In addition, at least a part of the right side of the cool storage material container (40) extends along the left side of the right refrigerant circulation pipe (13).

  The cool storage material container (40) is located behind the front edge of the front refrigerant flow pipe (13) and brazed to the refrigerant flow pipe (13) before and after each set (14). And an outward projecting portion (43) provided to extend forward from the front refrigerant flow pipe (13) and to the front edge of the main body portion (42), and the main body portion (42). The right side of the right side is along the left side of the right refrigerant circulation pipe (13).

  Between the right surface along the refrigerant flow pipe (13) and the refrigerant flow pipe (13) in the main body part (42) of the cold storage material container (40), and longer than the vertical length of the cold storage material container (40), and A water channel (23) is provided in which condensed water is generated and the generated condensed water flows in a meandering manner from top to bottom. Although not shown, the water channel (23) is formed on the right surface of the main body (42) of the regenerator container (40), and is inclined downward from the windward side (front side) toward the leeward side (rear side). The water channel forming ridges (24) and the second water channel forming ridges (25) inclined upward from the windward side toward the leeward side are alternately formed at intervals in the vertical direction. Is provided. The configuration of the water channel (23) and the ridges (24) and (25) for forming both water channels are the same as those of the evaporator (1) with the cold storage function of the first embodiment shown in FIG. 3, and are generated in the water channel (23). The condensed water thus flows in a meandering manner from the upper end to the lower end of the cool storage material container (40) through the water channel (23).

  Further, on the right surface along the refrigerant flow pipe (13) in the main body (42) of the cool storage material container (40), in addition to the double waterway forming ridges (24) and (25), the double waterway forming ridges (24 And a plurality of first short ridges (26) which are shorter than (25) and are inclined downward from the windward side toward the leeward side, and a plurality of first short protrusions (26) which are inclined upwardly from the windward side toward the leeward side A second short ridge (27) is formed. The configuration of both short ridges (26) and (27) is the same as the evaporator (1) with a cold storage function of the first embodiment shown in FIG.

  The outwardly projecting portion (43) of the cold storage material container (40) has the vertical dimension equal to the vertical dimension of the main body (42), and the horizontal dimension is the horizontal dimension of the main body (42). It is larger than the main body portion (42) and bulges outward in the left-right direction. The lateral dimension of the outward projecting part (43) is the same as the lateral dimension of the main body (42) of the cold storage container (40) to the pipe height that is the lateral dimension of the refrigerant flow pipe (13). It is equal to the height obtained by adding the protruding heights of the ridges (24), (25), (26), and (27).

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

  As the cold storage material filled in the cold storage material container (40), a paraffin-based latent heat cold storage material having a freezing point adjusted to about 5 to 10 ° C is used. Specifically, pentadecane, tetradecane, or the like is used. Cool storage material filling rate in the cool storage material container (40) (ratio of the volume of the enclosed cool storage material to the internal volume of the sealed internal space (40a) of the cool storage material container (16)) is preferably 70 to 90%, preferably Is 70-80%.

  The cool storage material container (40) is formed by pressing aluminum brazing sheets having a brazing filler metal layer on both sides, and the peripheral edges of two substantially vertical rectangular aluminum plates whose peripheral portions are brazed to each other. It consists of two substantially vertical rectangular aluminum plates (45) and (46) whose parts are brazed to each other. In the right aluminum plate (45) constituting the cool storage material container (40), the portion (47) forming the main body portion (42), that is, most of the portion excluding the front side portion, both water channel forming ridges (24) ( 25) and both short ridges (26) and (27) are formed. In addition, a bulge portion (48) that bulges rightward is provided over the entire length in the vertical direction at the portion of the right aluminum plate (45) that forms the outward projection (43), i.e., the front portion. Yes.

  A portion of the left aluminum plate (46) forming the cold storage material container (40) forming the main body portion (42), that is, most of the portion excluding the front side portion, has a first bulging portion bulging leftward ( 49) is provided, and the portion that also forms the outwardly projecting portion (43), that is, the front portion, is connected to the front side of the first bulging portion (49) and bulges to the right, and the first bulging portion A second bulging portion (51) having the same bulging height as (49) is provided over the entire length in the vertical direction.

  Then, the two aluminum plates (45), (46) are sandwiched between the inner fins (44), and the opening of the first bulging portion (49) of the left side aluminum plate (46) is opened to the right side aluminum plate (36). The part (47) that forms the main body part (42) of the aluminum plate is closed and the bulging parts (48) and (51) of the aluminum plates (45) and (46) are combined so that the openings face each other. The cold storage container (40) is formed by attaching. Here, the body portion (42) is formed by the portion (47) of the right aluminum plate (45) and the first bulging portion (49) of the left aluminum plate (46), and the bulging portion of the right aluminum plate (46). An outwardly projecting portion (43) is formed by (48) and the second bulging portion (51) of the left aluminum plate (47).

  In the heat exchange core part (4), each pair (14) composed of two refrigerant flow pipes (13) arranged in the front-rear direction and the two refrigerant flow pipes (13) of each set (14) are arranged straddling. The cool storage material container (40) constitutes a plurality of combinations (52). The combination body (52) is arranged at intervals in the left-right direction, and between the adjacent combination bodies (52) becomes a ventilation gap (15), and an aluminum outer fin is provided in the ventilation gap (15). (17) is arranged and brazed to the refrigerant flow pipe (13) and the cool storage material container (40). The fin body (34) of the outer fin (17) located on the right side of the combination body (52) consisting of the refrigerant flow pipe (13) and the regenerator container (40) of each pair (14) The outer projecting portion (35) is brazed to the outer projecting portion (43) of the cold storage material container (40). Further, the fin body portion (34) of the outer fin (17) located on the left side of the combination body (52) composed of the refrigerant flow pipe (13) and the cold storage material container (40) of each set (14) is a cold storage material container ( 40) is brazed to the main body portion (42), and the outwardly projecting portion (35) is also brazed to the outwardly projecting portion (43) of the cool storage material container (40).

  In the above two embodiments, each cool storage material container (16) (40) is independent, but is not limited to this. At least a part of all cool storage material containers (16) (40) is used. The internal spaces (16a) and (40a) of the plurality of cool storage material containers (16) and (40) may be communicated with each other via an appropriate communication portion.

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

(1): Evaporator with cool storage function
(13): Refrigerant distribution pipe
(15): Ventilation gap
(16) (40): Cold storage container
(16a) (40a): Interior space
(17): Outer fin
(23): Waterway
(24): First ridge for water channel formation
(25): Second waterway forming ridge
(26) (27): Short ridge
(52): Combination

Claims (9)

A plurality of refrigerant flow pipes that extend in the vertical direction and are arranged in parallel at intervals from each other, and a plurality of regenerator containers that extend in the vertical direction and in which the regenerator material is enclosed, , At least a portion is disposed along the refrigerant flow pipe and is brought into thermal contact with the refrigerant flow pipe, so that the cold storage material in the cold storage material container is cooled by the cold heat of the refrigerant flowing in the refrigerant flow pipe. In an evaporator with a cold storage function,
Between the refrigerant circulation pipe and the portion along the refrigerant circulation pipe in the cold storage material container, the length of the cold storage material container is longer than the vertical direction, and the condensed water generated is generated from the top to the bottom. Evaporator with cool storage function that has a water channel to flow. The refrigerant circulation pipe and the cold storage material container are each flat in the width direction in the ventilation direction, and a ventilation gap is formed between adjacent refrigerant circulation pipes, and the number of the cold storage material containers is the number of ventilation gaps. The cool storage material containers are arranged in some of the entire ventilation gaps, and both sides of the cool storage material container are arranged along one side of the refrigerant flow pipes on both sides, so that both sides of the cool storage material container The evaporator with a cool storage function according to claim 1, wherein a water channel is formed between at least one side and one side of the refrigerant circulation pipe, and fins are disposed in the remaining ventilation gap. The refrigerant distribution pipe and the cool storage material container are each flat in the width direction in the ventilation direction, the cool storage material container is arranged only on one side of each refrigerant flow pipe, and one side of the cool storage material container is the refrigerant flow pipe A water channel is formed along one side, between one side of the cold storage material container and one side of the refrigerant flow tube, and the combination of the refrigerant flow tube and the cold storage material container is perpendicular to the width direction of the refrigerant flow tube. The evaporator with a cool storage function according to claim 1, wherein the evaporator is disposed at an interval, a gap between adjacent combinations is a ventilation gap, and fins are arranged in the ventilation gap. The evaporator with a cool storage function according to any one of claims 1 to 3, wherein a water channel is provided from an upper end portion to a lower end portion of the cool storage material container, and the condensed water flows in a meandering manner. In the surface of the cool storage material container, a plurality of water channel forming ridges whose protruding ends are in contact with one surface of the refrigerant flow tube are provided at intervals on the surface along the refrigerant flow tube, and a water channel is formed by all the water channel forming ridges. The evaporator with a cool storage function according to any one of claims 1 to 4. On the surface along the refrigerant flow pipe in the cool storage material container, a first water channel forming protrusion that is inclined downward from the windward side toward the leeward side, and a second water channel that is inclined upward from the windward side toward the leeward side And a leeward end and a leeward end of the first waterway forming ridge, and a leeward and leeward end of the second waterway forming ridge. The evaporator with a cool storage function according to claim 5, wherein each of them is displaced in a ventilation direction. A pair of first water channel forming ridges and a second water channel forming ridge spaced immediately below the first water channel forming ridges; In the group consisting of ridges, the windward end and the leeward end of the first waterway forming ridge are on the windward side of the windward end and leeward end of the second waterway forming ridge, respectively. The evaporator with a cool storage function according to claim 6, which is located in The surface of the cool storage material container along the refrigerant flow pipe is shorter than the two water channel forming ridges and is inclined upward and / or downward from the windward side toward the leeward side, and the protruding end contacts the refrigerant flow pipe. The evaporator with a cool storage function according to claim 6 or 7, wherein a plurality of short ridges are provided at intervals. The evaporator with a cool storage function according to any one of claims 1 to 8, wherein internal spaces of at least some of the cool storage material containers among all the cool storage material containers are communicated with each other through a communication portion.

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