JP5342914B2 - Cold storage heat exchanger - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cold storage heat exchanger easy to be arranged in cases of an evaporator and a cold storage device. <P>SOLUTION: In the cold storage heat exchanger 1, the evaporator 2 having a plurality of coolant circulation pipe parts 8 arranged to have spaces to each other and the cold storage device 3 having a plurality of cold storage material enclosure pipes 23 arranged to have spaces to each other are arranged in series to the ventilating direction so that the evaporator 2 can be positioned windward. A first block 18 is arranged between the adjacent coolant circulation pipe parts 8 of the evaporator 2, and a second block 26 is arranged between the adjacent cold storage material enclosure pipes 23 in the cold storage device 3 and at a position corresponding to the first block 18. The first block 18 is formed with a female screw hole 19, and the second block 26 is formed with a screw insertion hole 27. A male screw 28 is inserted to the screw insertion hole 19 and is screw-fitted to the female screw hole 19 so as to connect/integrate the evaporator 2 and the cold storage device 3. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a cold storage heat exchanger used for 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 a problem, a compressor, a condenser as a refrigerant cooler that cools the refrigerant discharged from the compressor, a decompressor that decompresses the refrigerant that has passed through the condenser, An evaporator that is disposed in the ventilation path and evaporates the decompressed refrigerant; and a regenerator that is disposed in the ventilation path in the case on the downstream side in the ventilation direction of the evaporator and in which the regenerator material is enclosed. A plurality of refrigerant flow pipe portions arranged in parallel at intervals, and fins arranged between adjacent refrigerant flow pipe portions, and the regenerators are arranged in parallel at intervals from each other. What has the fin arrange | positioned between the several cool storage material enclosure pipe | tube parts and the adjacent cool storage material enclosure pipe | tube parts (refer patent document 1) is known.

  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 passes through the refrigerant circulation pipe portion of the evaporator. Heat exchange is performed with the air passing through the ventilation gap between the matching refrigerant circulation pipe portions, and the air is cooled and the refrigerant flows out as a gas phase. At this time, the cold heat of the cooling air that has passed through the evaporator is transmitted to the cold storage material present in the cold storage material enclosing tube portion through the fins of the cold storage device. As a result, the cold storage material is solidified to store cold heat. In addition, when the compressor is stopped, the cold heat of the regenerator material in the regenerator material enclosing tube portion of the regenerator is transmitted to the wind passing through the evaporator and the regenerator through the fins of 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, the evaporator and the regenerator must be handled separately, and there is a problem that the work of arranging the evaporator and the regenerator in the case is troublesome.

JP 2002-337537 A

  An object of the present invention is to provide a cold storage heat exchanger that solves the above-described problems and that can easily arrange the evaporator and the cold storage in a case.

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

1) An evaporator having a plurality of refrigerant circulation pipe portions arranged at intervals from each other, and a regenerator having a plurality of cold storage material enclosing pipe portions arranged at intervals from each other, the evaporator is located on the windward side Are arranged side by side in the ventilation direction as described above, the first block is arranged between adjacent refrigerant flow pipe parts in the evaporator, and between the adjacent cool storage material enclosing pipe parts in the regenerator at a position corresponding to the first block. A second block is arranged, a female screw hole is formed in one of the first block and the second block, a screw insertion hole is formed in the other, and the male screw is passed through the screw insertion hole. A regenerative heat exchanger in which an evaporator and a regenerator are connected and integrated by being screwed into a screw hole .

2) The cold storage heat exchanger according to the above 1) , wherein the first block of the evaporator and the second block of the cool storage unit are each formed of a heat conductive material, and both blocks are in contact with each other.

3) fin made of thermally conductive material is disposed between the refrigerant flow tube portions adjacent Eva porator, fins made of thermally conductive material is disposed between the cold accumulating material enclosing pipe section adjacent the regenerator, cold storage and fins of the evaporator The regenerative heat exchanger according to 1) or 2) above, which is in contact with the fins of the vessel.

According to the cold storage heat exchangers 1) to 3), the evaporator having a plurality of refrigerant flow pipe portions arranged at intervals from each other, and the plurality of cold storage material enclosing pipe portions arranged at intervals from each other. Since the evaporator and the regenerator are connected and integrated by the connecting means so that the evaporator is positioned on the windward side and the evaporator and the regenerator are connected and integrated, the evaporator and the regenerator are handled integrally. This makes it easy to place in the case. Moreover, since the evaporator and the regenerator are connected and integrated by the connecting means, the strength against vibration when mounted on the vehicle is increased.

According to the cold storage heat exchanger of 1) above, the evaporator and the cold storage can be connected and integrated relatively easily.

According to the regenerator heat exchanger of the above 2) , when storing cold heat in the regenerator material of the regenerator, the cold heat of the refrigerant flowing through the refrigerant refrigerant tube of the evaporator passes through both blocks in the regenerator material enclosing tube part of the regenerator. It is conveyed to the cold storage material. Therefore, the cooling rate of the regenerator of the cold accumulating material is increased, become cold heat can store efficiently regenerator material.

According to the cold storage heat exchanger of 3) above, the fins made of the heat conductive material are arranged between the refrigerant circulation pipe portions adjacent to the evaporator, and the fins made of the heat conductive material are arranged between the cold storage material enclosing pipe portions adjacent to the cold storage device. Since the fins of the evaporator and the fins of the regenerator are in contact with each other, the cold heat of the refrigerant flowing in the refrigerant circulation pipe part of the evaporator is transferred to the cold storage in the regenerator material enclosing pipe part of the regenerator via both fins. I can tell the material. Therefore, the cooling rate of the regenerator material of the regenerator is increased, and cold energy can be efficiently stored in the regenerator material.

It is a disassembled perspective view which shows the cool storage heat exchanger of Embodiment 1 of this invention. It is a right view which shows the cool storage heat exchanger of Embodiment 1 of this invention. It is an AA line expanded sectional view of FIG. It is a figure equivalent to FIG. 3 which shows the cool storage heat exchanger of Embodiment 2 of this invention. It is a disassembled perspective view which shows the cool storage heat exchanger of Embodiment 3 of this invention. It is a horizontal sectional view of the side plate part which shows the cool storage heat exchanger of Embodiment 3 of this invention. It is a disassembled perspective view which shows the cool storage heat exchanger of Embodiment 4 of this invention.

  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 each figure) is referred to as the front, the opposite side is referred to as the rear, and the up and down, left and right in FIGS. To do.

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

Embodiment 1
This embodiment is shown in FIGS.

  1 and 2 show a state in which the regenerative heat exchanger according to the first embodiment is arranged in a case of a car air conditioner, and FIG. 3 shows a configuration of a main part of the regenerative heat exchanger.

  1 to 3, the cold storage heat exchanger (1) includes an evaporator (2) and a cold storage material (not shown) enclosed, and is disposed on the front side of the evaporator (2) (downstream in the ventilation direction). And is arranged in the ventilation path (P) in the case (C). Although not shown, the evaporator (2) 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 decompresses the refrigerant that has passed through the condenser. A refrigeration cycle is configured together with the (reducer).

  The evaporator (2) is referred to as a stacked evaporator, and is provided with a pair of front header tank parts (4) (5) spaced apart in the vertical direction and spaced vertically. A pair of rear header tanks (6) and (7) arranged side by side on the rear side of both front header tanks (4) and (5), between both front header tanks (4) and (5), and both rear The header tank sections (6) and (7) are spaced apart from each other in the left-right direction, and the upper and lower end sections are connected to the upper and lower header tank sections (4) (5) and (6) (7). An aluminum corrugated outer fin (9) disposed between a plurality of refrigerant flow pipe portions (8), between the adjacent refrigerant flow pipe portions (8) and outside the refrigerant flow pipe portions (8) at both left and right ends; An aluminum side plate (11) disposed outside the outer fin (9) disposed at both ends and brazed to the outer fin (9). A refrigerant inlet (12) is formed at the right end of the upper front header tank section (4), and a refrigerant outlet (13) is formed at the right end of the upper rear header tank section (6).

  The header tank portions (4), (5), (6), (7) and the refrigerant flow pipe portion (8) of the evaporator (2) are brazed with a plurality of flat hollow bodies (14) arranged side by side in the left-right direction. It is formed by. The flat hollow body (14) is formed by brazing the peripheral portions of a plate (15) made of an aluminum brazing sheet having a brazing filler metal layer on both sides, and is formed at intervals in the front-rear direction. Two swelled refrigerant flow pipe parts (8) extending in the vertical direction, and connected to the upper and lower ends of each refrigerant flow pipe part (8) and having a bulge height higher than that of the refrigerant flow pipe part (8). And a high bulging header tank forming part (16). An aluminum corrugated inner fin (17) is disposed so as to straddle the refrigerant flow pipe portion (8) before and after the flat hollow body (14), and is brazed to both plates (15).

  Then, all the flat hollow bodies (14) are laminated so that the outer surfaces of the header tank forming portions (16) are in contact with each other and the header tank forming portions (16) of the adjacent flat hollow bodies (14) are communicated with each other. Thus, the header tank portions (4), (5), (6), and (7) and the entire refrigerant flow pipe portion (8) are formed by brazing each other. The outer fin (9) is disposed between adjacent flat hollow bodies (14) so as to be shared by the front and rear refrigerant flow pipe parts (8) and brazed to both the front and rear refrigerant flow pipe parts (8). Yes. The refrigerant flowing in from the refrigerant inlet (12) flows out from the refrigerant outlet (13) through all the header tank parts (4), (5), (6), (7) and all the refrigerant flow pipe parts (8). In addition, the header tank portions (4), (5), (6), and (7) are partitioned into partitions arranged in the left-right direction by partition members (not shown) at necessary portions.

  The evaporator (2) is made of aluminum so as to straddle the front and rear refrigerant flow pipe portions (8) in a part of the entire gap between the refrigerant flow pipe portions (8) of the flat hollow body (14) adjacent in the left-right direction. The first block (18) is disposed and brazed to both the front and rear refrigerant flow pipe portions (8). Here, the first blocks (18) are arranged in both the upper and lower portions of one gap on the right side and the upper and lower portions of one gap on the left side, respectively. In addition, the outer fin (9) is excised in the location where the 1st block (18) is arrange | positioned. Further, the first block (18) is arranged such that the length of the first block (18) in the vertical direction is equal to the length of the refrigerant flow pipe portion (8) in the vertical direction of the flat hollow body (14). The outer fin (9) may not be arranged in the gap. The thickness of the first block (18) in the left-right direction is equal to the interval between the refrigerant flow pipe portions (8) of the flat hollow bodies (14) adjacent in the left-right direction, and the length in the front-rear direction is the length of the flat hollow body (14). It is slightly longer than the width in the front-rear direction. And the front-end part of a 1st block (18) protrudes a little forward rather than the front side edge part of a flat hollow body (14). Each first block (18) is formed with a female screw hole (19) extending backward from the front end face thereof.

  The regenerator (3) is arranged in the width direction between a pair of aluminum header tanks (21) (22) extending in the left-right direction and spaced apart in the vertical direction, and between the header tanks (21) (22). A plurality of flat aluminum regenerator encapsulating pipes made of aluminum (23) with the upper and lower ends connected to the upper and lower header tanks (21) and (22) in a continuous manner ) (Cold storage material enclosure tube) and aluminum brazed to the cold storage material enclosure tube (23) between the adjacent cold storage material enclosure tubes (23) and outside the cold storage material enclosure tubes (23) at both left and right ends It comprises a corrugated fin (24) made of aluminum and an aluminum side plate (25) brazed to the corrugated fin (24) disposed outside the corrugated fins (24) at both left and right ends. As the regenerator material enclosed in the regenerator (3), it is preferable to use a water-based, paraffin-based or the like whose freezing point is adjusted to about 3 to 10 ° C. Further, the amount of the regenerator material enclosed in the regenerator (3) is preferably an amount that fills the entire regenerator material enclosing tube (23) up to the upper end. Here, the pipe height that is the horizontal dimension of the regenerator material enclosing pipe (23) of the regenerator (3) is higher than the pipe height that is the horizontal dimension of the refrigerant flow pipe part (8) of the evaporator. It has become.

  In the regenerator (3), a second block (26) made of aluminum is provided at a position corresponding to the first block (18) in a part of the entire gap between the regenerator enclosing tubes (23) adjacent in the left-right direction. ) Is arranged. In addition, the corrugated fin (24) is excised in the location where the 2nd block (26) is arrange | positioned. Further, the length of the second block (26) in the vertical direction is made equal to the length of the refrigerant flow pipe portion (8) of the flat hollow body (14), and in the gap where the second block (26) is arranged. The corrugated fin (24) may not be arranged. The thickness of the second block (26) in the left-right direction is equal to the interval between the regenerator material enclosure pipes (23) adjacent in the left-right direction, and the length in the front-rear direction is larger than the width in the front-rear direction of the regenerator material enclosure pipe (23). Slightly longer. And the rear-end part of the 2nd block (26) protrudes back a little rather than the rear side edge part of the cool storage material enclosure pipe | tube (23). A screw insertion hole (27) extending in the front-rear direction is formed in each second block (26) in a penetrating manner.

  Then, with the rear end surface of each second block (26) in contact with the front end surface of each first block (18), the aluminum male screw (28) is inserted into the screw insertion hole of each second block (26). It is passed from the front through (27) and is screwed into the female screw hole (19) of the first block (18), whereby the evaporator (2) and the regenerator (3) are connected and integrated. . Both blocks (18) and (26) and male screw (28) constitute a connecting means for connecting and integrating the evaporator (2) and the regenerator (3).

  In the above-described regenerative heat exchanger (1), 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 passes through the refrigerant inlet (12) and the evaporator. The upper rear header tank (4) enters the upper front header tank section (4) and passes through all the header tank sections (4) (5) (6) (7) and all the refrigerant flow pipe sections (8). It flows out from the refrigerant outlet (13) of the section (6). And, while the refrigerant flows in the refrigerant flow pipe part (8), heat exchange is performed with the air (see arrows X in FIGS. 1 to 3) passing through the ventilation gap between the adjacent refrigerant flow pipe parts (8). However, the refrigerant flows out as a gas phase.

  At this time, the regenerator material enclosed in the regenerator (3) is cooled by the cooling air that has passed through the evaporator (2) to cool the regenerator material present in the regenerator material enclosure pipe (23), and the refrigerant circulation pipe of the evaporator (2) The cold heat of the refrigerant flowing in the section (8) is enclosed in the regenerator (3) through the first block (18), the second block (26) and the male screw (28), and the regenerator material enclosing tube (23) The regenerator material existing inside is cooled. As a result, the cold storage material is solidified and cold energy is stored.

  When the compressor stops, the cold heat of the regenerator material in the regenerator (3) is transmitted to the wind passing through the evaporator (2) and the regenerator (3) via the corrugated fins (24). Therefore, even if the temperature of the wind that has passed through the evaporator (2) rises, the wind is cooled by the regenerator (3), so that a rapid decrease in cooling capacity is prevented.

Embodiment 2
This embodiment is shown in FIG.

  In the case of the cold storage heat exchanger (30) of the second embodiment, the front edge of the outer fin (9) of the evaporator (2) protrudes forward from the front edge of the flat hollow body (14), and cool storage The rear edge of the corrugated fin (24) of the vessel (3) protrudes rearward from the rear edge of the cold storage material enclosure tube (23). The front edge of the outer fin (9) of the evaporator (2) is in contact with the rear edge of the corrugated fin (24) of the regenerator (3).

  According to this cold storage heat exchanger (30), the cold heat of the refrigerant flowing in the refrigerant flow pipe portion (8) of the evaporator (2) is transferred to the cold storage (through the outer fin (9) and the corrugated fin (24) ( It can be transmitted to the regenerator material in the regenerator material enclosure tube (23) of 3). Therefore, the cooling rate of the regenerator material of the regenerator (3) is increased, and cold energy can be efficiently stored in the regenerator material.

Embodiment 3
This embodiment is shown in FIG. 5 and FIG.

  In the case of the cold storage heat exchanger (35) of the third embodiment, an outwardly protruding wall (36) protruding outward in the left-right direction is integrally formed on the front side edge of each side plate (11) of the evaporator (2). Yes. Further, on the rear edge of each side plate (25) of the regenerator (3), an outwardly projecting wall (37) projecting outward in the left-right direction and in surface contact with the outwardly projecting wall (36) of the evaporator (2) Are integrally formed. Bolt insertion holes (38) and (39) are formed in the outer projecting walls (36) and (37) of the side plate (11) of the evaporator (2) and the side plate (25) of the regenerator (3), respectively. Has been. Then, the bolt (41) is passed from the front through the bolt insertion holes (38) and (39) of the both outward projecting walls (36) and (37), and the nut (42) is screwed to the tip of the bolt (41). Thus, the evaporator (2) and the regenerator (3) are connected and integrated. Evaporator (2) and regenerator (3) side plates (11) (25) outwardly projecting walls (36) (37), bolts (41) and nuts (42) are connected to evaporator (2) and regenerator ( 3) is connected and integrated.

Embodiment 4
This embodiment is shown in FIG.

  In the case of the regenerative heat exchanger (45) of the fourth embodiment, the front and rear header tank parts (4) (6) on the upper side of the evaporator (2) and the header tank (21) on the upper side of the regenerator (3) (header tank part) ), And the front and rear header tanks (5) and (7) below the evaporator (2) and the header tank (22) (header tank) below the regenerator (3) The evaporator (2) and the regenerator (3) are connected and integrated by being sandwiched between the sandwiching members (46) and (47).

  The upper clamping member (46) is formed integrally with a horizontal plate-like base portion (46a) that is long in the left-right direction when viewed from the plane, and in a downward projecting manner on both front and rear edges of the base portion (46a). It consists of a clamping wall (46b). The lower sandwiching member (47) is formed integrally with a horizontal plate-like base portion (47a) that is a rectangle that is long in the left-right direction when viewed from the top, and on the front and rear side edges of the base portion (47a). And a sandwiching wall (47b). A plurality of drain holes (48) for draining the condensed water generated in the evaporator (2) are formed in the base portion (47a) of the lower sandwiching member (47) in a penetrating manner.

  The front and rear header tank parts (4) (6) on the upper side of the evaporator (2) and the upper header tank (21) of the regenerator (3) are connected to both sandwiching walls (46b) of the upper sandwiching member (46). ) Between the front and rear header tanks (5) (7) on the lower side of the evaporator (2) and the header tank (22) on the lower side of the regenerator (3). The evaporator (2) and the regenerator (3) are connected and integrated by being forcibly inserted between the sandwiching walls (47b) of (47). Both sandwiching members (46) and (47) constitute connecting means for connecting and integrating the evaporator (2) and the regenerator (3).

  According to the cold storage heat exchanger (45), the cold heat of the refrigerant flowing in the header tank portions (4), (5), (6), and (7) of the evaporator (2) is transferred to both sandwiched members (46) (47 ) To the regenerator material in the header tanks (21) and (22) of the regenerator (3). Therefore, the cooling rate of the regenerator material of the regenerator (3) is increased, and cold energy can be efficiently stored in the regenerator material.

  In all the above-described embodiments, as a regenerator, a plurality of flat hollow bodies formed by brazing the peripheral portions with a pair of plate-like plates facing each other are arranged in parallel and arranged at intervals from each other. Between the header tank section and the header tank sections, the width direction is directed in the front-rear direction, and the header tank section is spaced in the length direction, and both end sections are respectively connected to the header tank sections. In addition, one having a plurality of flat regenerator enclosing tube portions, that is, a header tank portion and a regenerator encapsulating tube portion may be used. Further, as an evaporator, a pair of header tanks arranged at a distance from each other, and between the header tanks, the width direction is directed in the front-rear direction and the header tank is arranged at a distance in the length direction, and both ends A portion having a plurality of refrigerant flow pipes connected to both header tanks, that is, a header tank and a refrigerant flow pipe formed separately may be used.

  The cold storage heat exchanger according to the present invention is suitably used for a refrigeration cycle that constitutes 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) (30) (35) (45): Cold storage heat exchanger
(2): Evaporator
(3): Regenerator
(4) (5) (6) (7): Header tank
(8): Refrigerant distribution pipe
(9): Outer fin
(11): Side plate
(18): First block
(19): Female thread hole
(21) (22): Header tank (header tank)
(23): Cold storage material enclosure tube (cold storage material enclosure tube)
(24): Corrugated fin
(25): Side plate
(26): Second block
(27): Screw insertion hole
(28): Male thread
(36) (37): Outwardly protruding wall
(41): Bolt
(42): Nut
(46) (47): Clamping member

Claims (3)

An evaporator having a plurality of refrigerant circulation pipe portions spaced apart from each other and a regenerator having a plurality of cold storage material enclosing pipe portions spaced from each other such that the evaporator is positioned on the windward side It arrange | positions along with the ventilation direction, a 1st block is arrange | positioned between the adjacent refrigerant | coolant circulation pipe parts in an evaporator, and it is 2nd in the position corresponding to a 1st block between the adjacent cool storage material enclosure pipe parts in a cool storage. A block is arranged, a female screw hole is formed in one of the first block and the second block, a screw insertion hole is formed in the other block, and a male screw is passed through the screw insertion hole. A regenerative heat exchanger in which an evaporator and a regenerator are connected and integrated by being screwed to each other. The regenerator heat exchanger according to claim 1 , wherein the first block of the evaporator and the second block of the regenerator are each formed of a heat conductive material, and both the blocks are in contact with each other . A fin made of a heat conductive material is arranged between adjacent refrigerant flow pipe parts of the evaporator, and a fin made of a heat conductive material is arranged between adjacent cool storage material enclosing pipe parts of the regenerator, and the fin of the evaporator and the fin of the regenerator The cold storage heat exchanger according to claim 1 or 2, wherein

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