JP2011133126A - Evaporator with cold storage function - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an evaporator with a cold storage function capable of efficiently storing cold in a cold storage material. <P>SOLUTION: This evaporator with the cold storage function includes a plurality of flat hollow pipes 4 having refrigerant circulation passages 15 and cold storage material enclosing passages 16, disposed at intervals to each other, and having the width direction toward the ventilating direction, a header section 7 for a refrigerant communicated with the refrigerant circulation passages 15 of the flat hollow pipes 4, and a header section 8 for the cold storage material communicated with the cold storage material enclosing passages 16 of the flat hollow pipes 4. The cold storage material enclosing passages 16 are arranged at a leeward side of the refrigerant circulation passages 15. The cold storage material is enclosed in the cold storage material enclosing passages 16 of the flat hollow bodies 4. <P>COPYRIGHT: (C)2011,JPO&INPIT

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 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.

  By the way, in a normal car air conditioner equipped with a compressor, a refrigerant cooler that cools the refrigerant discharged from the compressor, a decompressor that decompresses the refrigerant that has passed through the refrigerant cooler, and an evaporator that evaporates the decompressed refrigerant 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, as a car air conditioner that solves such problems, the compressor, the condenser that cools the refrigerant discharged from the compressor, the decompressor that decompresses the refrigerant that has passed through the condenser, and the ventilation path in the case, and An evaporator that evaporates the decompressed refrigerant; and a regenerator that is disposed in a ventilation path in the case on the downstream side of the evaporator in the ventilation direction and in which a regenerator material is enclosed. And a plurality of regenerator enclosing tubes in which regenerators are arranged in parallel at intervals from each other, and a plurality of refrigerant flow tubes arranged in a shape and fins arranged between adjacent refrigerant flow tubes And what has the fin arrange | positioned between adjacent cool storage material enclosure tubes is known (refer patent document 1).

  According to the car air conditioner described in Patent Document 1, when the compressor is operating, the refrigerant that has passed through the compressor, the condenser, and the expansion valve enters the evaporator and is adjacent to the evaporator while flowing through the evaporator refrigerant flow pipe. Heat exchange is performed with the air passing through the ventilation gap between the refrigerant flow pipes, and the refrigerant flows out as a gas phase. At this time, the cool storage material existing in the cool storage material enclosure pipe of the regenerator is cooled by the cooling air that has passed through the evaporator, and as a result, the cool storage material is solidified to store cold heat. Further, when the compressor is stopped, the cold heat of the regenerator material in the regenerator material enclosing tube of the regenerator is transmitted to the wind passing through the evaporator and the regenerator. Therefore, even if the temperature of the wind that has passed through the evaporator rises, the wind is cooled by the regenerator, so that a rapid decrease in the cooling capacity is prevented.

  However, in the case of the car air conditioner described in Patent Document 1, when the cold energy is stored in the regenerator material of the regenerator, the cold heat of the refrigerant flowing through the refrigerant refrigerant pipe of the evaporator is stored in the regenerator of the regenerator via the low heat transfer air. Since it is only transmitted to the regenerator material in the material enclosing tube, there is a problem that the cooling rate of the regenerator material of the regenerator becomes low, and cold energy cannot be efficiently stored in the regenerator material.

JP 2002-337537 A

  An object of the present invention is to provide an evaporator with a cold storage function that solves the above problems and can efficiently store cold heat in a cold storage material.

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

  1) A refrigerant having a refrigerant flow path and a regenerator material enclosing path, spaced apart from each other and arranged in the width direction in the ventilation direction, and the refrigerant flow path of the flat hollow body communicated The evaporator with a cool storage function is equipped with the header part for cold storage, and the header part for cool storage materials through which the cool storage material enclosure path of a flat hollow body is connected, and the cool storage material is enclosed in the cool storage material enclosure path of a flat hollow body.

  2) The evaporator with a cold storage function according to the above 1), wherein the cold storage material sealing passage is provided side by side on the leeward side of the refrigerant flow passage.

  3) The evaporator with a cool storage function according to the above 1) or 2), wherein fins shared by the refrigerant flow passage and the cool storage material enclosing passage are arranged in a ventilation gap between adjacent flat hollow bodies.

  4) Two tanks having a header for refrigerant and a header for cold storage material are arranged at intervals, a plurality of flat hollow bodies are arranged between both tanks, and both ends of all flat hollow bodies are The above-mentioned 1) to 3), in which the refrigerant flow passages of the all flat hollow bodies are joined to both tanks and lead to the refrigerant header portions of both tanks, and the cool storage material enclosure passages lead to the cool storage material header portions of both tanks The evaporator with a cool storage function as described in any one of them.

  5) The adjacent flat hollow bodies are meandered as a whole by being alternately connected by U-shaped connecting pipe portions at either end in the length direction, and the adjacent flat hollow bodies are connected to the connecting pipe portions. The first communication passage through which the refrigerant flow passages of the body pass and the second communication passage through which the regenerator material enclosure passages pass are provided, and is opposite to the connection pipe portion in the flat hollow bodies located at both ends in the arrangement direction. Are connected to a tank having a refrigerant header portion and a regenerator header portion, respectively, and the refrigerant flow passages of the flat hollow bodies located at both ends in the alignment direction lead to the refrigerant header portions of both tanks, The evaporator with a cool storage function according to any one of the above items 1) to 3), wherein the material sealing path communicates with the headers for the cool storage material of both tanks.

  6) The flat hollow body is composed of two metal plates joined in a laminated form, and the refrigerant flow passage and the cold storage material enclosing passage are at least one of the two metal plates constituting the flat hollow body. Two refrigerant header forming portions that form the refrigerant header portion and two cold storage material header portions that form the cold storage material header portion are formed in the flat hollow body by bulging the metal plate outward. Any one of the above 1) to 3), wherein the portion is provided by bulging outwardly at least one of the two metal plates constituting the flat hollow body Evaporator with cold storage function described.

  According to the evaporator with a cold storage function of 1) to 6) above, a plurality of flat hollow bodies having a refrigerant flow passage and a cold storage material enclosing passage and spaced apart from each other and arranged in the width direction in the direction of the wind And a refrigerant header portion through which the refrigerant flow passage of the flat hollow body is communicated and a header portion for cold storage material through which the cold storage material enclosure passage of the flat hollow body is communicated, and in the cold storage material enclosure passage of the flat hollow body Since the regenerator material is enclosed, when storing cold heat in the regenerator material in the regenerator material enclosure path, the cold heat of the refrigerant flowing through the refrigerant flow passage is efficiently passed through the flat hollow body wall. It is conveyed to the cold storage material inside. Therefore, the cooling rate of the regenerator material in the regenerator material enclosing passage becomes high, and it becomes possible to efficiently store the cold energy in the regenerator material.

  According to the evaporator with the cold storage function of 2) above, when the air passes through the ventilation gap between the adjacent flat hollow bodies, the hot air is not directly applied to the cold storage material enclosing path. Therefore, the regenerator material in the regenerator material enclosure path is prevented from being heated by high-temperature air, and it is possible to prevent a decrease in the regenerator efficiency. And since it becomes possible to prevent the fall of cool storage efficiency, it becomes possible to reduce the quantity of the cool storage material enclosed in the cool storage material enclosure path, and can achieve weight reduction.

  According to the evaporator with a cold storage function of 3) above, when cold energy is stored in the cold storage material, the cold heat of the cooling air that has passed through the portion where the refrigerant flow passage of the adjacent flat hollow body is provided, the fins To the regenerator material existing in the regenerator material enclosing passage. Therefore, the cooling rate of the regenerator material in the regenerator material enclosing passage becomes high, and it becomes possible to efficiently store the cold energy in the regenerator material. In addition, when the engine stops and the compressor stops, the cold heat of the regenerator material in the regenerator material enclosing passage passes through the ventilation gap between adjacent flat hollow bodies through the fins from the regenerator material enclosing passage. Because it is transmitted to the air that cools, cooling performance improves.

BRIEF DESCRIPTION OF THE DRAWINGS It is a perspective view which notches some parts and shows the whole structure of the evaporator with a cool storage function of Embodiment 1 of this invention. It is an AA line expanded sectional view of FIG. FIG. 3 is a sectional view taken along line B-B in FIG. 2. It is a perspective view which shows the one end part of the flat hollow tube used for the evaporator with a cool storage function shown in FIG. It is a perspective view which shows the whole structure of the evaporator with a cool storage function of Embodiment 2 of this invention. FIG. 6 is an enlarged sectional view taken along the line CC of FIG. 5. It is a perspective view which shows the whole structure of the evaporator with a cool storage function of Embodiment 3 of this invention. It is the DD sectional view taken on the line of FIG. It is a disassembled perspective view which shows the flat hollow body used for the evaporator with a cool storage function shown in FIG.

  Embodiments of the present invention will be described below with reference to the drawings. In addition, the same code | symbol is attached | subjected to the same part and the same thing through all drawings, and the overlapping description is abbreviate | omitted.

  In the following description, the downstream side in the ventilation direction (the direction indicated by the arrow X in FIGS. 1, 5 and 7) is referred to as the front, and the opposite side is referred to as the rear. It is assumed to be up and down and left and right. In the following description, the term “aluminum” includes aluminum alloys in addition to pure aluminum.

Embodiment 1
This embodiment is shown in FIGS.

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

  In FIG. 1, an evaporator with a cold storage function (1) includes an aluminum first tank (2) and an aluminum second tank (3) extending in the left-right direction and spaced apart in the vertical direction, and both tanks (2 ) (3) Flat hollow tubes (4) (flat hollow bodies) made of a plurality of vertical aluminum extruded sections with the width direction facing in the front-rear direction (ventilation direction) and spaced apart in the left-right direction An aluminum corrugated fin (5) disposed between the adjacent flat hollow tubes (4) and outside the flat hollow tubes (4) on both left and right ends and brazed to the flat hollow tubes (4), An aluminum side plate (6) disposed outside the corrugated fins (5) at the left and right ends and brazed to the corrugated fins (5).

  As shown in FIGS. 1 to 3, the first tank (2) has a refrigerant header portion (7) located on the rear side (windward side) and a header portion for the regenerator material located on the front side (leeward side). (8) is provided by dividing the first tank (2) into two front and rear parts by a vertical plate-like partition member (9) extending in the left-right direction. A refrigerant inlet (11) is formed at the right end of the refrigerant header (7). A plurality of first elongated holes (12) that are long in the front-rear direction are formed in the lower wall of the refrigerant header (7) at intervals in the left-right direction. A plurality of second long holes (13) elongated in the front-rear direction are formed in the lower wall of the cool storage material header portion (8) at intervals in the left-right direction. The first elongated hole (12) and the second elongated hole (13) are formed at the same position in the left-right direction. In addition, the length of the 2nd long hole (13) of the header part for cool storage materials (8) is shorter than the 1st long hole (12) of the inlet header part for refrigerant | coolants (7). The cross-sectional area of the refrigerant header portion (7) is larger than the cross-sectional area of the cool storage material header portion (8).

  The second tank (3) has substantially the same configuration as the first tank (2), and is disposed upside down with respect to the first tank (2). .

  The difference between the second tank (3) and the first tank (2) is that a refrigerant outlet (14) is formed at the right end of the rear refrigerant header (7) instead of the refrigerant inlet (11). It has been done.

  As shown in FIGS. 2 to 4, the flat hollow tube (4) has a plurality of refrigerant flow passages (15) arranged in the width direction and a plurality of cold storage materials arranged in the width direction. The enclosure path (16) is provided so that the regenerator material enclosure path (16) is arranged on the leeward side (front side) of the refrigerant flow path (15). The cross-sectional area of the regenerator material enclosing passage (16) is larger than the cross-sectional area of the refrigerant flow passage (15). The partition wall (17) between the refrigerant flow passage (15) at the front end and the regenerator material enclosing passage (16) at the rear end is formed by the partition members (9) of the first and second tanks (2) and (3). Is also thick. On the thick partition wall (17) of the flat hollow tube (4), a notch (18) for fitting the partition member (9) is formed from both ends thereof, and both end portions of the flat hollow tube (4) are formed. The rear side of the notch (18) is inserted into the first elongated hole (12) of the refrigerant header (7) of the first and second tanks (2) (3) and The portion in front of the notch (18) is inserted into the second elongated hole (13) of the regenerator header portion (8) of the first and second tanks (2) (3), and further the first and second With the partition member (9) of the two tanks (2) and (3) fitted into the notch (18), the upper and lower ends of the flat hollow tube (4) are the first and second tanks (2) ( It is brazed to 3). The refrigerant flow passage (15) of the all flat hollow pipe (4) communicates with the refrigerant header (7) of the first and second tanks (2) and (3), and the regenerator material enclosing passage (16). Communicates with the regenerator header portion (8) of the first and second tanks (2) and (3).

  In the regenerator material enclosing passage (16) of the flat hollow tube (4), a regenerator material (not shown) having a freezing point such as water-based or paraffinic is adjusted to about 3 to 10 ° C. 16) It is enclosed so that the inside is filled to the upper end. The cool storage material is sealed in either one of the cool storage material header portion (8) of the first tank (2) and the cool storage material header portion (8) of the second tank (3) (not shown). And the other air vent (not shown) is formed, a predetermined amount of cold storage material is injected from the inlet, and then the inlet and the air outlet are sealed.

  The corrugated fin (5) is disposed in the ventilation gap between the adjacent flat hollow tubes (4) so as to be shared by the refrigerant flow passage (15) and the cold storage material enclosure passage (16).

  The evaporator with a cold storage function (1) described above constitutes a refrigeration cycle that uses a chlorofluorocarbon refrigerant together with a compressor, a condenser as a refrigerant cooler, a gas-liquid separator, and an expansion valve as a decompressor, and as a car air conditioner, It is mounted on a vehicle that temporarily stops an engine that is a drive source of the compressor when the vehicle is stopped, for example, an automobile. When the compressor is operating, the low-pressure gas-liquid mixed phase two-phase refrigerant that has passed through the compressor, the condenser, and the expansion valve flows from the refrigerant inlet (11) to the refrigerant header of the first tank (2). Flows into the section (7). The refrigerant flowing into the refrigerant header portion (7) of the first tank (2) flows downward through the refrigerant flow passage (15) of the flat hollow tube (4), and the refrigerant in the second tank (3). Enters the header section (7) and is discharged through the refrigerant outlet (14). The gas-liquid mixed phase two-phase refrigerant flows through the refrigerant flow passage (15) of the flat hollow tube (4), and the ventilation gap between adjacent flat hollow tubes (4) is indicated by an arrow in FIG. It exchanges heat with the air flowing in the direction indicated by X and flows out as a gas phase.

  At this time, the cold heat of the refrigerant flowing in the refrigerant flow passage (15) is transmitted to the cold storage material in the cold storage material enclosing path (16) through the peripheral wall of the flat hollow tube (4). In addition, the cold heat of the cooling air that has passed through the portion in which the refrigerant flow passageway (15) is provided in the ventilation gap between the adjacent flat hollow tubes (4) is passed through the cold storage material enclosing passage through the corrugated fins (5). (16) It is transmitted to the regenerator material that exists within. As a result, cold energy is stored in the cold storage material.

  When the compressor stops, the cold heat of the regenerator material in the regenerator material enclosing passage (16) of the flat hollow tube (4) is adjacent to the flat hollow tube (4) via the corrugated fin (5). It is transmitted to the wind passing through the ventilation gap between the two. Therefore, even when the compressor is stopped, a rapid decrease in the cooling capacity is prevented.

Embodiment 2
This embodiment is shown in FIG. 5 and FIG.

  FIG. 5 shows the overall configuration of the evaporator with a cold storage function of the second embodiment, and FIG. 6 shows the configuration of the main part thereof.

  5 and 6, the evaporator (20) with a cold storage function includes an aluminum first tank (21) and an aluminum second tank (22) which are spaced apart in the left-right direction, and both tanks (21). (22) A meandering hollow tube (23) made of extruded aluminum and disposed between them.

  The first and second tanks (21) and (22) are cylindrical with the rear ends opened and the front ends closed. The first tank (21) includes a refrigerant header portion (24) located on the rear side (windward side) and a regenerator header portion (25) located on the front side (leeward side). 21) It is provided by dividing the interior into two front and rear parts by a vertical plate-like partition member (26). A refrigerant inlet (27) including a rear end opening of a cylindrical body constituting the first tank (21) is formed at the rear end portion of the first tank (21). A first long hole (28) that is long in the front-rear direction is formed in the lower portion of the peripheral wall of the refrigerant header (24). One second long hole (29) that is long in the front-rear direction is formed in the lower portion of the peripheral wall of the header for cold storage material (25). In addition, the length of the 2nd long hole (29) of the header part for cold storage materials (25) is shorter than the 1st long hole (28) of the header part for refrigerant | coolants (24). The length of the refrigerant header portion (24) in the front-rear direction is longer than the length of the cold storage material header portion (25) in the front-rear direction.

  The second tank (22) has substantially the same configuration as the first tank (21), and the same parts are denoted by the same reference numerals.

  The difference between the second tank (22) and the first tank (21) is that a refrigerant outlet (31) is formed at the rear end of the refrigerant header (24) instead of the refrigerant inlet (27). It is that you are.

  The meandering hollow tube (23) is adjacent to a plurality of vertical flat tube portions (32) (flat hollow bodies) that have a width direction in the front-rear direction (ventilation direction) and are spaced in the left-right direction. The flat tube portions (32) that fit together are U-shaped connection tube portions (33) that alternately and integrally connect at either one end in the length direction. The flat tube portion (32) includes a plurality of refrigerant flow passages (34) arranged in the width direction and a plurality of cool storage material enclosure paths (35) arranged in the width direction. The passage (35) is provided so as to be arranged on the leeward side (front side) of the refrigerant flow passage (34). The cross-sectional area of the regenerator material enclosing passage (35) is larger than the cross-sectional area of the refrigerant flow passage (34). The partition wall (36) between the refrigerant flow passage (34) at the front end and the regenerator material passage (35) at the rear end is formed by the partition members (26) of the first and second tanks (21) and (22). Is also thick. Although not shown in the drawings, the connecting pipe part (33) includes a first communication path through which the refrigerant flow paths (34) of the adjacent flat pipe parts (32) pass, and each cool storage material sealing path (35). And a second communication passage through which the air is passed. That is, the meandering hollow tube (23) has a plurality of refrigerant flow passages (34) provided side by side in the width direction and a plurality of regenerator enclosing passages (35) provided side by side in the width direction. It is formed by bending a long flat aluminum extruded tube into a meandering shape.

  The thick partition walls (36) located at both ends (left and right both ends) in the arrangement direction are notched for fitting the partition member (26) from the end opposite to the connecting pipe (33), here the upper end. (37) is formed, and the portion on the rear side of the notch (37) at the upper end of the flat tube portion (32) at the left and right ends is for the refrigerant of the first and second tanks (21) (22). The header part (24) is inserted into the first elongated hole (28), and the front part of the notch (37) is the header part for the regenerator material of the first and second tanks (21) (22). Inserted into the second elongated hole (29) of (25) and the meandering with the partition member (26) of the first and second tanks (21) and (22) fitted in the notch (37) Both ends of the hollow tube (23) are brazed to the first and second tanks (21) and (22). And the refrigerant | coolant flow path (34) of the flat pipe part (32) located in both right and left ends leads to the refrigerant | coolant header part (24) of a 1st and 2nd tank (21) (22), and a cool storage material enclosure path (35) communicates with the regenerator header portion (25) of the first and second tanks (21), (22).

  Aluminum corrugated fins (38) are arranged between the adjacent flat tube portions (32) of the meandering hollow tube (23) and outside the flat tube portions (32) at both the left and right ends. An aluminum side plate (39) is disposed outside the corrugated fins (38) at both left and right ends and brazed to the corrugated fins (38).

  In the regenerator material enclosing passage (35) of the flat tube portion (32), a regenerator material (not shown) having a freezing point such as water-based or paraffinic is adjusted to about 3 to 10 ° C. ) Is filled to fill the upper end. The cool storage material is sealed in either one of the cool storage material header portion 25 of the first tank 21 and the cool storage header portion 25 of the second tank 22 (not shown). And the other air vent (not shown) is formed, a predetermined amount of cold storage material is injected from the inlet, and then the inlet and the air outlet are sealed.

  The evaporator with a cold storage function described above constitutes a refrigeration cycle using a CFC-based refrigerant together with a compressor, a condenser as a refrigerant cooler, a gas-liquid separator, and an expansion valve as a decompressor. It is mounted on a vehicle that temporarily stops an engine that is a drive source of the machine, for example, an automobile. When the compressor is operating, the low-pressure gas-liquid mixed-phase two-phase refrigerant that has passed through the compressor, the condenser, and the expansion valve flows from the refrigerant inlet (27) to the refrigerant header of the first tank (21). Flows into the section (24). The refrigerant flowing into the refrigerant header portion (24) of the first tank (21) flows through the refrigerant flow passage (34) of the meandering hollow tube (23) and is used for the refrigerant of the second tank (22). It enters the header section (24) and is discharged through the refrigerant outlet (31). The gas-liquid mixed phase two-phase refrigerant flows through the refrigerant flow passage (34) of the flat tube portion (32), and the ventilation gap between the adjacent flat tube portions (32) is indicated by an arrow X in FIG. It exchanges heat with the air flowing through it and flows out as a gas phase.

  At this time, the cold heat of the refrigerant flowing in the refrigerant flow passage (34) is transmitted to the cold storage material in the cold storage material enclosing path (35) through the peripheral wall of the meandering hollow tube (23). Moreover, the cold heat of the cooling air that has passed through the portion where the refrigerant flow passageway (34) is provided in the ventilation gap between the adjacent flat tube portions (32) is the cold heat of the cooling air that has passed through the corrugated fins ( It is transmitted to the cool storage material existing in the cool storage material enclosure path (35) via 38). As a result, cold energy is stored in the cold storage material.

  When the compressor stops, the cold heat of the regenerator material in the regenerator material enclosing passage (35) of the flat tube part (32) is transferred between the adjacent flat tube parts (32) via the corrugated fins (38). It is transmitted to the wind passing through the ventilation gap. Therefore, even when the compressor is stopped, a rapid decrease in the cooling capacity is prevented.

Embodiment 3
This embodiment is shown in FIGS.

  FIG. 7 shows the whole structure of the evaporator with a cool storage function of Embodiment 3, and FIG. 8 and FIG. 9 show the structure of the principal part.

  7 and 8, the evaporator with a cold storage function (40) includes a plurality of vertical rectangular hollow bodies arranged in a stacked manner in the left-right direction with the width direction in the front-rear direction (ventilation direction) and joined to each other. (41) and a pair of refrigerant headers (42) positioned at the rear side (windward side) with an interval in the vertical direction, and a front side (downwind) with a spacing in the vertical direction A pair of regenerator header portions (43) located on the side) and a refrigerant flow passage (44) provided between both refrigerant header portions (42) and communicated with both refrigerant header portions (42) Between the regenerator material enclosing passage (45) provided between the regenerator material header portions (43) and communicated with the regenerator material header portions (43) and the adjacent flat hollow body (41). Aluminum that is disposed in the gap so as to be shared by the refrigerant flow passage (44) and the cold storage material enclosure passage (45) and brazed to the flat hollow body (41). And a manufacturing corrugated outer fins (46). A refrigerant inlet (47) is formed at the right end of the upper refrigerant header (42), and a refrigerant outlet (48) is formed at the right end of the lower refrigerant header (42). The cross-sectional area of the refrigerant header portion (42) is larger than the cross-sectional area of the cool storage material header portion (43). Further, the cross-sectional area of the refrigerant flow passage (44) is larger than the cross-sectional area of the cold storage material enclosing passage (45).

  As shown in FIG. 9, the flat hollow body (41) is composed of two vertically rectangular aluminum plates (50) in which peripheral portions are brazed to each other. All the aluminum plates (50) are made of an aluminum brazing sheet having a brazing filler metal layer on both sides, and have the same outer shape when viewed from the left and right. Between the two aluminum plates (50) constituting the flat hollow body (41), there is a flat tubular refrigerant flow passage (44) extending in the vertical direction, and located in front of the refrigerant flow passage (44) and in the vertical direction. A flat tubular regenerator enclosing passage (45), a swelled refrigerant header forming portion (51) connected to both upper and lower ends of the refrigerant flow passage (44), and both upper and lower ends of the regenerator enclosing passage (45) And a bulging-type regenerator material header forming part (52) connected to each part. The horizontal flow heights of the refrigerant flow passage (44) and the cold storage material enclosure passage (45) of the flat hollow body (41) are equal. Corrugated inner fins (53), (54) made of aluminum are arranged in the refrigerant flow passage (44) and the cold storage material enclosure passage (45) of the flat hollow body (41), respectively, and both aluminum plates (50 ) Is brazed. Also, the horizontal height of the refrigerant header forming portion (51) and the cold storage material header forming portion (52) of the flat hollow body (41) is equal, and the refrigerant flow passage (44) and the cold storage material sealing passage (45 ) And the header forming portions (51) and (52) of the adjacent flat hollow bodies (41) are brazed to each other. Therefore, the portions corresponding to the refrigerant flow passage (44) and the cool storage material sealing passage (45) between the adjacent flat hollow bodies (41) form a ventilation gap.

  The right aluminum plate (50) constituting most of the flat hollow body (41) extends in the vertical direction and bulges to the right, and forms a refrigerant flow passage (44), and a first bulge portion (55). And the right and left ends of the first bulge portion (55) bulge to the right and the bulge height is higher than that of the first bulge portion (55), and the refrigerant header forming portion (51) is A second bulging portion (56) to be formed, a third bulging portion (57) that extends in the vertical direction and bulges to the right and forms a cool storage material enclosing passage (45), and a third bulging portion ( 57) a fourth bulging portion that continues to the right and left ends of the bulging portion and bulges to the right, has a bulging height higher than that of the third bulging portion (57), and forms a regenerator header forming portion (52). (58). Through holes (59) and (61) are formed in the top walls of the second and fourth bulge portions (56) and (58), respectively. The left aluminum plate (50) constituting most flat hollow bodies (41) is the left aluminum plate (50) reversed left and right and upside down. Attached. Note that no through hole is formed in the top wall of the second and fourth bulges (56), (58) of the left aluminum plate (50) of the flat hollow body (41) at the left end. In the top wall of the upper and lower second bulges (56) of the body (41), a refrigerant circulation hole (not shown) communicating with the refrigerant inlet (47) and the refrigerant outlet (48) is formed instead of the through hole. Yes. Then, the two aluminum plates (50) are arranged so that the openings of the first to fourth bulge portions (55) (56) (57) (58) face each other through the inner fins (53) (54). The flat hollow body (41) is formed by brazing in combination.

  The header forming portions (51), (52) of two adjacent flat hollow bodies (41) are connected to through holes (59, 59) of the second and fourth bulge portions (56), (58) of the flat hollow body (41). ) (61) are brazed to each other so that the header forming portions (51) (52) of the adjacent flat hollow bodies (41) are joined in a continuous manner. The header formation parts (51) and (52) of all the flat hollow bodies (41) form the refrigerant header part (42) and the regenerator header part (43), and the upper refrigerant inlet (47) The refrigerant that has flowed into the refrigerant header portion (42) through the refrigerant flow passages (44) of all the flat hollow bodies (41) enters the lower refrigerant header portion (42), and enters the refrigerant outlet ( 48) It is made to flow out.

  In the regenerator material enclosing passage (45) of the flat hollow body (41), a regenerator material (not shown) in which the freezing point such as water or paraffin is adjusted to about 3 to 10 ° C. ) Is filled to fill the upper end. Enclose the regenerator material by forming an inlet (not shown) in either one of the upper and lower regenerator header parts (43) and forming the other air vent (not shown). After injecting a predetermined amount of the cold storage material, the inlet and the air vent are sealed.

  The evaporator with a cold storage function described above constitutes a refrigeration cycle using a CFC-based refrigerant together with a compressor, a condenser as a refrigerant cooler, a gas-liquid separator, and an expansion valve as a decompressor. It is mounted on a vehicle that temporarily stops an engine that is a drive source of the machine, for example, an automobile. When the compressor is in operation, the low-pressure gas-liquid mixed-phase two-phase refrigerant that has passed through the compressor, the condenser, and the expansion valve passes through the refrigerant header (42) above the refrigerant inlet (47). , Flows downward through the refrigerant flow passage (44) of the flat hollow body (41), enters the lower refrigerant header (42), and is discharged through the refrigerant outlet (48). The gas-liquid mixed phase two-phase refrigerant exchanges heat with the air flowing in the direction indicated by the arrow X in FIGS. 7 and 8 while flowing through the refrigerant flow passage (44) of the flat hollow body (41). And flows out in the gas phase.

  At this time, the cold heat of the refrigerant flowing in the refrigerant flow passage (44) is transmitted to the cold storage material in the cold storage material enclosing passage (45) through the aluminum plate (50) forming the flat hollow body (41). In addition, the cooling air having the cooling air that has passed through the portion where the refrigerant flow passageway (44) is provided in the ventilation gap between the adjacent flat hollow bodies (41) has the cooling air that has passed through the ventilation gap between the two. Cold heat is transmitted to the cold storage material existing in the cold storage material enclosing path (45) via the outer fin (46). As a result, cold energy is stored in the cold storage material.

  When the compressor is stopped, the cold heat of the regenerator material in the regenerator material enclosing passage (45) of the flat hollow body (41) is exchanged between the adjacent flat hollow bodies (41) via the outer fins (46). It is transmitted to the wind passing through the ventilation gap. Therefore, even when the compressor is stopped, a rapid decrease in the cooling capacity is prevented.

  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) (20) (40): Evaporator with cool storage function
(2) (21): First tank
(3) (22): Second tank
(4): Flat hollow tube (flat hollow body)
(5) (38): Corrugated fin
(15) (34) (44): Refrigerant flow path
(16) (35) (45): Regenerator enclosure
(32): Flat tube (flat hollow body)
(33): Connecting pipe
(41): Flat hollow body
(46): Corrugated outer fin
(50): Aluminum plate (metal plate)
(51): Refrigerant header forming part
(52): Regenerator header formation
(55) (56) (57) (58): bulge

Claims (6)

A plurality of flat hollow bodies having a refrigerant flow passage and a regenerator passage, and spaced apart from each other and arranged in the width direction in the ventilation direction, and a refrigerant header through which the refrigerant flow passage of the flat hollow body is communicated And an evaporator with a cold storage function in which a cold storage material enclosing passage is connected to the flat hollow body, and a cold storage material is enclosed in the flat hollow body storage passage. The evaporator with a cool storage function according to claim 1, wherein the cool storage material sealing passage is provided side by side on the leeward side of the refrigerant flow passage. The evaporator with a cool storage function according to claim 1 or 2, wherein fins shared by the refrigerant flow passage and the cool storage material enclosing passage are arranged in a ventilation gap between adjacent flat hollow bodies. Two tanks having a header for refrigerant and a header for cold storage material are arranged at intervals, a plurality of flat hollow bodies are arranged between both tanks, and both ends of the whole flat hollow body are both tanks. The refrigerant flow passage of the all flat hollow body communicates with the refrigerant header portions of both tanks, and the regenerator material enclosing passage communicates with the regenerator header portions of both tanks. An evaporator with a cold storage function described in Crab. Adjacent flat hollow bodies are meandered as a whole by being alternately connected by U-shaped connecting pipe portions at either end in the length direction, and adjacent flat hollow bodies are connected to the connecting pipe portions. A first communication passage through which the refrigerant flow passages pass and a second communication passage through which the regenerator enclosing passages pass are provided, and the end opposite to the connection pipe portion in the flat hollow body located at both ends in the arrangement direction Are joined to tanks each having a refrigerant header part and a regenerator header part, and the flat hollow hollow refrigerant flow passages located at both ends in the alignment direction lead to the refrigerant header parts of both tanks and contain a regenerator material The evaporator with a cool storage function according to any one of claims 1 to 3, wherein the path leads to a header for the cool storage material of both tanks. The flat hollow body is composed of two metal plates joined in a laminated form, and the refrigerant flow passage and the cold storage material enclosing passage are at least one of the two metal plates constituting the flat hollow body. Are formed by bulging outward, and in the flat hollow body, two refrigerant header forming portions that form the refrigerant header portion, and two cold storage material header forming portions that form the cold storage material header portion, The cold storage according to any one of claims 1 to 3, which is provided by bulging outwardly at least one of the two metal plates constituting the flat hollow body. Evaporator with function.

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