JP2010243066A - Cold storage heat exchanger - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cold storage heat exchanger capable of efficiently storing cold heat in cold storage material and allowing easy manufacturing works. <P>SOLUTION: The cold storage heat exchanger 1 is composed of an evaporator 2 and a cold accumulator 3 enclosing the cold storage material therein. The evaporator 2 comprises coolant tank parts 4, 5 and a plurality of flat coolant circulation pipe parts 6 with their one ends communicated to the coolant tank parts 4, 5. The cold accumulator 3 comprises tank parts 4, 5 for cold storage material arranged to have distances from the coolant tank parts 4, 5 and arranged outside in the longitudinal direction of the coolant circulation pipe parts 6 from other end parts of the coolant circulation pipe parts 6, and a plurality of flat cold storage material enclosing pipe parts 6 having one end parts communicated to the tank parts 4, 5 for cold storage material and other end parts extending to a side of coolant header parts 4, 5. The coolant circulation pipe parts 6 of the evaporator 2 and the cold storage material enclosing pipe parts 6 of the cold accumulator 3 are aligned in the length direction of the coolant tank parts 4, 5 and the tank parts 4, 5 for cold storage material and are made to contact each other. <P>COPYRIGHT: (C)2011,JPO&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 this specification and claims, the downstream side in the ventilation direction (the direction indicated by the arrow X in FIGS. 1 and 7) is the front, and the opposite side is the rear.

  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, it is arranged in a compressor, a condenser that cools the refrigerant discharged from the compressor, a decompressor that decompresses the refrigerant that has passed through the condenser, and a 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 the regenerator material is enclosed, the evaporators are spaced apart from each other. A plurality of refrigerant flow pipe portions arranged in parallel 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 material enclosure pipe | tube part and the adjacent cool storage material enclosure pipe | tube parts 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 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, when the cold energy is stored in the regenerator material of the regenerator, the cold heat of the refrigerant flowing through the refrigerant distribution pipe portion of the evaporator is transferred to the regenerator through the air having low heat conductivity. Since it is only transmitted to the regenerator material in the regenerator material enclosing tube section, the cooling rate of the regenerator material of the regenerator becomes low, and there is a problem that cold energy cannot be efficiently stored in the regenerator material.

  Moreover, the cold storage heat exchanger of patent document 2 is proposed in order to solve the problem which the car air conditioner of patent document 1 has. The regenerative heat exchanger described in Patent Document 2 has a pair of refrigerant tank portions arranged at a distance from each other and a length of the refrigerant tank portion between the refrigerant tank portions with the width direction facing in the front-rear direction. An evaporator having a plurality of flat refrigerant flow pipe portions arranged at intervals in the vertical direction and having both end portions respectively connected to both refrigerant tank portions, and fixed to one surface of the refrigerant flow pipe portion of the evaporator And a hollow cool storage container in which a cool storage material is enclosed, and a set of a refrigerant circulation pipe part and a cool storage container is provided at intervals in the length direction of the tank part, A fin is disposed between a set of adjacent refrigerant flow pipe portions and a cold storage container. The evaporator of the regenerative heat exchanger described in Patent Document 2 constitutes a refrigeration cycle using a chlorofluorocarbon refrigerant together with a compressor and a condenser as a refrigerant cooler, and is mounted on a vehicle, for example, an automobile, as a car air conditioner.

  According to the cold storage heat exchanger described in Patent Document 2, the cold heat of the low-temperature refrigerant flowing through the refrigerant flow pipe part passes through the wall of the refrigerant flow pipe part and the wall of the cold storage container and is transmitted to the cold storage material in the cold storage container. Therefore, compared to the case of the car air conditioner described in Patent Document 1, it is possible to efficiently store cold heat in the cold storage material.

  However, the cold storage heat exchanger described in Patent Document 2 has a problem that the work of enclosing the cold storage material in a plurality of cold storage containers is extremely troublesome and the manufacturing work is difficult.

JP 2002-337537 A Japanese Patent No. 4043776

  The object of the present invention is to solve the above-mentioned problems, and can store cold heat in the regenerator material more efficiently than the car air conditioner described in Patent Document 1, and the manufacturing work is less than that of the regenerative heat exchanger described in Patent Document 2. It is to provide an easy cold storage heat exchanger.

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

  1) It is composed of an evaporator and a regenerator in which a regenerator material is enclosed, and the evaporator is disposed with an interval in the length direction of the refrigerant tank portion and the refrigerant tank portion and the width direction in the front-rear direction, And a plurality of flat refrigerant flow pipe portions whose one end portions are communicated with the refrigerant tank portion, and the regenerator is spaced apart from the refrigerant tank portion and more than the other end portion of the refrigerant flow pipe portion. The regenerator material tank unit disposed on the outer side in the length direction of the unit, and the regenerator material tank unit having the width direction directed in the front-rear direction and spaced in the length direction of the regenerator material tank unit, and one end portion thereof A plurality of flat regenerator material enclosing tube portions that are communicated with the other end portion and extend to the refrigerant header portion side, and the refrigerant circulation tube portion of the evaporator and the regenerator material enclosing tube portion of the regenerator include the refrigerant Tank and regenerator tank Cold storage heat exchanger which is brought into contact with each other with aligned in the length direction of the.

  2) A set of the refrigerant circulation pipe part of the evaporator and the regenerator material enclosing pipe part of the regenerator that is in contact with the refrigerant circulation pipe part is spaced apart in the length direction of the refrigerant tank part and the regenerator tank part. The regenerative heat exchanger according to 1) above, wherein the air gap is provided between adjacent pairs, and fins are arranged in the air gap.

  3) Front and rear refrigerant flow comprising two refrigerant tanks arranged side by side in the front-rear direction and a plurality of refrigerant flow pipes arranged at intervals in the length direction of the refrigerant tank Each refrigerant tank portion is connected to one end of the refrigerant flow tube portion of each refrigerant flow tube portion group, and the refrigerant flow tube portions of both the front and rear refrigerant flow tube portion groups are arranged in the front-rear direction. In addition, the other end portions of the two refrigerant flow pipe portions arranged in the front-rear direction are communicated with each other via the communication portion, and the regenerators are provided in two regenerator tank portions arranged side by side in the front-rear direction. And two regenerator material enclosing tube groups composed of a plurality of regenerator material enclosing tube portions arranged at intervals in the length direction of the regenerator material tank unit, and each regenerator material tank unit is provided with each regenerator One end of the regenerator material enclosing tube part of the material encapsulated tube part group is connected, and both the front and rear regenerator materials are sealed. The regenerator material enclosing tube part of the tube part group is arranged in the front-rear direction, and the other end parts of the two regenerator material-enclosed tube parts arranged in the front-rear direction are communicated with each other via the communication part. The tank part for the regenerator is disposed on the outer side in the length direction of the regenerator material enclosing pipe part from the communication part of the regenerator, and the tank part for the regenerator material in the regenerator is located outside the communication part of the evaporator in the length direction of the regenerator The cold storage heat exchanger according to 1) or 2) above, which is disposed in

4) The evaporator is formed by laminating a plurality of flat hollow bodies composed of two plates brazed to each other at the periphery, and each flat hollow body is disposed in the front-rear direction between the two plates. Two swelled refrigerant flow pipe parts formed side by side and a bulge that is formed to be connected to one end of both refrigerant flow pipe parts between the two plates and has a higher bulge height than the refrigerant flow pipe parts A protruding header forming portion and a bulging communication portion formed between the two plates so as to be connected to the other ends of both refrigerant flow pipe portions and to be passed through both refrigerant flow pipe portions; The header forming parts of the hollow body are joined together, and the tank part for the refrigerant is formed by the header forming part of the all flat hollow body,
The regenerator is formed by laminating a plurality of flat hollow bodies composed of two plates whose peripheral portions are brazed to each other, and each flat hollow body is arranged in the front-rear direction between the two plates. Are formed so as to be connected to one end of both of the regenerator material enclosing tube parts between the two plates and having a bulge height higher than that of the regenerator material enclosing tube part. It has a high bulge-like header forming part and a bulge-like communicating part formed between the two plates so as to be connected to the other end of both the regenerator material enclosing tube parts and through both the regenerator material enclosing tube parts The cold storage heat exchanger according to 3) above, wherein the header forming portions of adjacent flat hollow bodies are joined together, and the tank portion for the cold storage material is formed by the header forming portions of all flat hollow bodies.

5) The evaporator is composed of a header tank in which the front and rear refrigerant tank parts are integrated, and a U-shaped bent flat tube having both ends connected to each refrigerant tank part of the header tank, and the U-shaped bent flat tube is It is formed by bending one flat tube at the middle part in the length direction, and is composed of two straight pipe parts located in the same plane and a connecting part that connects both straight pipe parts, and is U-shaped bent While both straight pipe parts of the flat tube become the refrigerant flow pipe part, the connecting part is a communicating part,
The regenerator consists of a header tank in which the front and rear regenerator tank parts are integrated, and a U-shaped bent flat tube with both ends connected to each regenerator tank part of the header tank, and the U-shaped bent flat tube is It is formed by bending one flat tube at the middle part in the length direction, and is composed of two straight pipe parts located in the same plane and a connecting part that connects both straight pipe parts, and is U-shaped. The cold storage heat exchanger according to 3) above, wherein both straight pipe portions of the bent flat tube serve as a cold storage material enclosing pipe portion, and the connection portion is a communication portion.

  According to the regenerator heat exchanger of 1) to 5) above, it is composed of an evaporator and a regenerator in which a regenerator material is enclosed, and the evaporator has a refrigerant tank section and a refrigerant tank with the width direction directed in the front-rear direction. A plurality of flat refrigerant flow pipes arranged at intervals in the length direction of the part and having one end communicated with the refrigerant tank part, and the regenerator is spaced apart from the refrigerant tank part The tank portion for the regenerator material disposed on the outer side in the length direction of the refrigerant flow tube portion with respect to the other end portion of the refrigerant flow tube portion, and the width direction is directed in the front-rear direction and the interval in the length direction of the regenerator material tank portion is spaced. And a plurality of flat cold storage material enclosing tube portions whose one end portion is connected to the regenerator material tank portion and the other end portion extends to the refrigerant header portion side, and the refrigerant circulation pipe portion of the evaporator And the regenerator material tube of the regenerator Since the tank portion for cooling and the tank portion for regenerator material are arranged in contact with each other and are in contact with each other, the cold heat of the low-temperature refrigerant flowing through the refrigerant flow tube portion of the evaporator is reduced by the wall of the refrigerant flow tube portion and the regenerator. It will be transmitted to the cool storage material in the cool storage material sealing tube through the wall of the cool storage material sealing tube. Therefore, compared with the car air conditioner described in Patent Document 1, cold energy can be efficiently stored in the cold storage material.

  In addition, the regenerator is spaced from the refrigerant tank part and disposed on the outer side in the length direction of the refrigerant flow pipe part from the other end part of the refrigerant flow pipe part, and the width direction is the front-rear direction. A plurality of flat-type cold accumulators arranged at intervals in the length direction of the regenerator material tank portion and having one end portion connected to the regenerator material tank portion and the other end portion extending to the refrigerant header portion side Since the material enclosure pipe part is provided, the cold storage material can be enclosed in all the cold storage material enclosure pipe parts by putting the cold storage material from the cold storage material tank part. Therefore, compared with the cold storage heat exchanger described in Patent Document 2, the cooling storage material is easily sealed, and the entire manufacturing operation is facilitated.

  Furthermore, the regenerator has a regenerator tank portion that is spaced apart from the refrigerant tank portion of the evaporator and that is disposed outside the other end portion of the refrigerant flow tube portion in the longitudinal direction of the refrigerant flow tube portion. Since the refrigerant tank part and the regenerator material tank part are independent, for example, it is not necessary to separate the inside of one tank into the refrigerant tank part and the regenerator material tank part, and the refrigerating cycle of the regenerator material Can be prevented.

  According to the cold storage heat exchanger of the above 2), when the engine is stopped and the compressor is stopped, the cold heat of the cold storage material in the cold storage material enclosing tube portion of the cold storage passes through the ventilation gap through the fins. Since it is transmitted to the air, the cooling performance is improved.

It is a perspective view which shows the whole structure of the cool storage heat exchanger of Embodiment 1 of this invention. It is the vertical sectional view which looked at the front from the back of the cool storage heat exchanger of Drawing 1. It is an AA line expanded sectional view of FIG. It is a disassembled perspective view which shows the flat hollow body of the evaporator of the cool storage heat exchanger of FIG. It is a perspective view which shows the flat hollow body of the evaporator of the cool storage heat exchanger of FIG. 1, and the flat hollow body of a cool storage device. It is a figure which shows the flow of the refrigerant | coolant in the evaporator of the cool storage heat exchanger of FIG. It is a perspective view which shows the whole structure of the cool storage heat exchanger of Embodiment 2 of this invention. It is the vertical sectional view which looked at the front from the back of the cool storage heat exchanger of Drawing 7. It is a BB line expanded sectional view of Drawing 8. It is a perspective view which expands and shows a part of U-shaped bending flat tube of the evaporator of the cool storage heat exchanger of FIG.

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

  In the following description, the top and bottom, left and right in FIGS. 2 and 8 are referred to as top and bottom 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. 1 and 2 show the overall configuration of the cold-storage heat exchanger of Embodiment 1, and FIGS. 3 to 5 show the configuration of the main part. FIG. 6 shows how the refrigerant flows in the evaporator of the cold storage heat exchanger shown in FIG.

  1 to 3, the regenerator heat exchanger (1) includes an evaporator (2) through which a refrigerant flows and a regenerator (3) in which a regenerator material (not shown) is enclosed.

  The evaporator (2) is provided side by side in the front-rear direction and has two refrigerant tank parts (4) (5) extending in the left-right direction, and the width direction in the front-rear direction and the left-right direction (refrigerant tank part (4) (5) (longitudinal direction) with a plurality of flat refrigerant flow pipe portions (6) arranged at intervals and having upper end portions connected to the front and rear refrigerant tank portions (4) and (5) It has two front and rear refrigerant flow pipe group groups (7). A refrigerant inlet member (8) is provided at the right end of the refrigerant tank portion (4) on the front side of the evaporator (2), and a refrigerant outlet member (9) is provided on the left end of the refrigerant tank portion (5) on the rear side. ing. The refrigerant flow pipe sections (6) of the front and rear refrigerant flow pipe section groups (7) are arranged in the front-rear direction, and the lower ends of the refrigerant flow pipe sections (6) arranged in the front-rear direction are connected via the communication section (11). Through.

  As shown in FIG. 1 to FIG. 5, the evaporator (2) has a plurality of vertical flats for evaporators 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. A hollow body (12) is provided. The flat hollow body (12) is formed by brazing two plates (13) made of an aluminum brazing sheet having a brazing filler metal layer on both sides and having the same outer shape when viewed from the left and right sides. Is. Between the two plates (13) constituting the flat hollow body (12), there are two swelled refrigerant flow pipe parts (6) before and after extending in the vertical direction, and upper ends of both refrigerant flow pipe parts (6). There are provided a bulged tank forming portion (14) continuous with each other, and a bulged communication portion (11) for allowing the lower end portions of both the front and rear refrigerant flow pipe portions (6) to pass through. An aluminum corrugated inner fin (15) is disposed so as to straddle the refrigerant flow pipe portion (6) before and after the flat hollow body (12), and is brazed to both plates (13). The heights in the left-right direction of both refrigerant flow pipe portions (6) of the flat hollow body (12) are equal to each other. Further, the horizontal heights of both tank forming portions (14) of the flat hollow body (12) are equal to each other and higher than the horizontal height of the refrigerant flow pipe portion (6). Further, the horizontal height of the communication part (11) is equal to the horizontal height of the refrigerant flow pipe part (6). The evaporator (2) is formed by brazing the tank forming portions (14) of the adjacent flat hollow bodies (12) in a continuous manner.

  The left plate (13) that constitutes most of the flat hollow body (12) has two pipe-forming bulges (16) that extend in the vertical direction and bulge to the left, and each pipe part. A tank portion forming bulge portion (17) connected to the upper end of the bulge portion (16) and bulging to the left and having a bulge height higher than the bulge portion for pipe portion formation (16); A communicating portion forming bulge portion (18) straddling the lower ends of both pipe portion forming bulge portions (16) and bulging to the left and having the same bulge height as the pipe portion forming bulge portion (16). ). A through hole (19) is formed in the top wall of each bulge portion (17) for forming the tank portion. A reinforcing rib (21) protruding rightward is formed on the top wall of the bulging portion (18) for forming the communication portion. The right plate (13) constituting most of the first flat hollow body (12) is the left plate (13) reversed left and right, and the same portions are denoted by the same reference numerals. Then, the two hollow plates (13) are brazed in combination so that the openings of the bulging portions (16), (17), and (18) face each other through the inner fin (15), so that the flat hollow body (12) is formed. At this time, the reinforcing ribs (21) of both plates (13) are brazed together. In addition, the tank forming portions (14) of two adjacent flat hollow bodies (12) communicate with each other so that the through holes (19) of the bulging portions (17) for forming the tank portions of the flat hollow bodies (12) communicate with each other. The tank forming portions (14) of the adjacent flat hollow bodies (12) are brazed to each other so as to communicate with each other, and both the front and rear tank forming portions (14 of all flat hollow bodies (12) are connected. ) To form both front and rear refrigerant tanks (4) and (5).

  A refrigerant inlet member (8) is provided so as to communicate with the through hole (19) in the top wall of the front tank portion forming bulge portion (17) in the right side plate (13) of the flat hollow body (12) at the right end, A refrigerant outlet member (9) is provided so as to communicate with a through hole (19) in the top wall of the rear tank portion forming bulge portion (17) in the left side plate (13) of the flat hollow body (12) at the left end. ing. In the right side flat plate (13) of the right end flat hollow body (12), the top wall of the rear tank portion forming bulging portion (17) and the left end of the flat hollow body (12) on the left side plate (13) The through-hole (19) is not formed in the top wall of the front tank portion forming bulge portion (17). Also, than the top wall of the front side bulging part (17) in the right side plate (13) of the flat hollow body (12) located on the right side of the central part in the left-right direction, and the central part in the left-right direction The through hole (19) is not formed on the top wall of the rear tank portion forming bulge portion (17) in the right side plate (13) of the flat hollow body (12) located on the left side. The front refrigerant tank (4) and the rear refrigerant tank (5) are divided into two spaces by partitions (22), respectively. The front refrigerant tank portion (4) and the rear refrigerant tank portion (5) are partitioned into two spaces by the partition (22), respectively, so that the front side of the refrigerant inlet member (8) is separated from the front side. The refrigerant that has flowed into the right compartment of the refrigerant tank section (4) passes through all the flat hollow bodies (12) and enters the left compartment of the rear refrigerant tank section (5), and then the refrigerant. It flows out through the outlet member (9).

  The regenerator (3) has substantially the same configuration as that obtained by rotating the evaporator (2) 180 degrees around a straight line extending in the front-rear direction, and the same reference numerals are given to the respective parts. Here, the tank section for refrigerant (4) (5) is a tank section for cold storage material, the refrigerant distribution pipe section (6) is a cold storage material enclosure pipe section, the refrigerant distribution pipe section group (7) is a cold storage material enclosure pipe section group, The communicating portion (11) is a communicating portion that allows the upper end portions of the regenerator material enclosing tube portion (6) to pass through each other. The difference between the regenerator (3) and the evaporator (2) is that a through-hole is formed in the top wall of the front and rear tank forming bulges (17) in the right side plate (13) of the flat hollow body (12) at the right end ( 19) is formed, and cold storage is performed so as to communicate with the through hole (19) in the top wall of the front side bulging portion (17) in the right side plate (13) of the flat hollow body (12) at the right end. A material injection member (23) is provided and communicates with a through hole (19) in the top wall of the rear tank portion forming bulge portion (17) in the right side plate (13) of the flat hollow body (12) at the right end. The air vent member (24) is provided, the refrigerant inlet member (8) and the refrigerant outlet member (9) are not provided, and the left and right flat plates (12) on the left side plate (13) There is no through hole (19) formed on the top wall of the bulging part (17) for forming both tank parts, and the two front and rear regenerator tank parts (4) and (5) are divided into two spaces. It is that it is not turned off. The refrigerant tank section (4) (5) of the evaporator (2) is located above the communication section (11) of the regenerator (3) (outside in the length direction of the regenerator material enclosing pipe section (6)). The regenerator tank part (4) (5) of the regenerator (3) is disposed below the communication part (11) of the evaporator (2) (outside in the length direction of the refrigerant flow pipe part (6)). ing.

  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. In addition, the amount of the regenerator material enclosed in the regenerator (3) should be an amount that fills the entire regenerator material enclosing pipe (6) up to the upper end and the communication part (11). . The regenerator material injection member (23) and the air vent member (24) are closed after the regenerator material is enclosed in the regenerator (3).

  Refrigerant flow pipe part (6) and communication part (11) of flat hollow body (12) of evaporator (2), and regenerator material enclosed pipe part (6) and communication part of flat hollow body (12) of regenerator (3) The parts (11) are aligned in the left-right direction (the length direction of the refrigerant tank parts (4) (5) and the regenerator tank parts (4) (5)) and are mutually in contact with each other. It is attached. Here, the cool storage material enclosing tube portion (6) and the communication portion (11) of the flat hollow body (12) of the regenerator (3) are connected to the cool storage material enclosing tube portion of the flat hollow body (12) of the evaporator (2) ( 6) and the communication part (11) are located on the right side of the refrigerant storage pipe (6) and the communication part (11) on the left side of the refrigerant flow pipe part (6) and the communication part (11) It is brought into contact with the surface and brazed. Then, the refrigerant flow pipe part (6) and the communication part (11) of the flat hollow body (12) of the evaporator (2), and the flat hollow body (12) of the regenerator (3) in contact with the refrigerant flow pipe part (6) ) Of the regenerator material enclosing tube portion (6) and the communication portion (11) (25) are provided in the left-right direction with an interval between them, and between the adjacent sets (25) the ventilation gap ( 26) and an aluminum corrugated outer fin (27) is arranged in the ventilation gap (26), and the refrigerant flow pipe part (6) and the communication part (11), and the regenerator material sealed pipe part (6 ) And the communication part (11). The width of the outer fin (27) in the front-rear direction is almost equal to the width in the front-rear direction of the flat hollow body (12) of the evaporator (2) and the regenerator (3). It straddles the material enclosure tube (6).

  Refrigerant circulation pipe part (6) and communication part (11) of the flat hollow body (12) at the left end of the evaporator (2), and the regenerator material enclosing pipe part of the flat hollow body (12) at the right end of the regenerator (3) ( 6) and the corrugated outer fin (27) made of aluminum are also arranged outside the communication part (11), and the refrigerant storage pipe of the refrigerant flow pipe part (6) and the communication part (11) and the regenerator (3) is enclosed. It is brazed to the pipe part (6) and the communication part (11). In addition, aluminum side plates (28) are disposed outside the outer fins (27) at the left and right ends, and are brazed to the outer fins (27). The upper ends of both side plates (28) are brazed to the outer surface of the tank forming section (14) of the flat hollow body (12) at both the left and right ends of the evaporator (2), and the lower ends are also the left and right of the regenerator (3). It is brazed to the outer surface of the tank forming part (14) of the flat hollow body (12) at both ends. The refrigerant inlet member (8) and the refrigerant outlet member (9) of the evaporator (2), the regenerator material enclosing pipe (6) and the air vent member (24) of the regenerator (3) pass through the side plate (28). Yes.

  The evaporator (2) of the cold storage heat exchanger (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 a refrigerant that has passed through the condenser. A car air conditioner is configured with an expansion valve (pressure reducer) for reducing the pressure of the air conditioner. In the car air-conditioner, when the compressor is operating, as shown in FIG. 6, the low-pressure gas-liquid mixed phase two-phase refrigerant compressed by the compressor and passed through the condenser and the expansion valve becomes a refrigerant inlet member. (8) passes through the right compartment of the front refrigerant tank (4) of the evaporator (2) of the regenerator heat exchanger (1), passes through all flat hollow bodies (12) and is used for the rear refrigerant After entering the left compartment of the tank part (5), it flows out through the refrigerant outlet member (9). Then, while the refrigerant flows through the refrigerant flow pipe portion (6), heat exchange is performed with the air passing through the ventilation gap (26), and the air is cooled and the refrigerant flows out as a gas phase.

  At this time, the cold heat of the refrigerant flowing in the refrigerant flow pipe part (6) and the communication part (11) of the evaporator (2) is converted into the plate (13) (the refrigerant flow pipe part (6) and the regenerator material enclosing pipe part (6 ) Through the wall of the regenerator material (6) and the communication part (11) of the regenerator (3) and the communication part (11). ) Is transmitted to the regenerator material, and as a result, the regenerator material is solidified to store cold energy.

  When the compressor is stopped, the cold energy of the regenerator material in the regenerator material (3) of the regenerator material (3) and the regenerator material in the communication part (11), the regenerator material enclosing pipe part (6) and the communication part ( It is transmitted to the air passing through the ventilation gap (26) through the outer fin (27) brazed to 11). Therefore, even if the temperature of the wind that has passed through the evaporator (2) rises, the wind is cooled, so that a rapid decrease in the cooling capacity is prevented.

Embodiment 2
This embodiment is shown in FIGS. 7 and 8 show the overall configuration of the regenerative heat exchanger of the second embodiment, and FIGS. 9 and 10 show the configuration of the main part thereof.

  7 to 9, the cold storage heat exchanger (30) includes an evaporator (31) through which a refrigerant flows and a cold storage (32) in which a cold storage material (not shown) is enclosed.

  The evaporator (31) is arranged side by side in the front-rear direction and extends in the left-right direction, and has two refrigerant tank parts (33), (34), and the width direction faces in the front-rear direction and the left-right direction (refrigerant tank part (33) (34) in the longitudinal direction), and has a plurality of flat refrigerant flow pipe portions (35) whose upper ends communicate with the front and rear refrigerant tank portions (33) (34). It has two front and rear refrigerant flow pipe group groups (36). A refrigerant inlet member (37) is provided at the right end of the refrigerant tank portion (33) on the front side of the evaporator (31), and a refrigerant outlet member (38) is provided on the left end of the refrigerant tank portion (34) on the rear side. ing. The refrigerant flow pipe portions (35) of both the front and rear refrigerant flow pipe portion groups (36) are arranged in the front-rear direction, and the lower ends of the refrigerant flow pipe portions (35) arranged in the front-rear direction are connected to each other via the communication portion (39). Through.

  The evaporator (31) includes an aluminum header tank (41) in which the front and rear refrigerant tank portions (33) (34) are integrated, and each refrigerant tank portion (33) (34) with both ends of the header tank (41). And a U-shaped bent flat tube (42) made of aluminum.

  The front refrigerant tank portion (33) of the header tank (41) is divided into two left and right spaces by a partition (43) on the right side of the central portion in the left and right direction. ) Is divided into two left and right spaces by a partition (43) on the left side of the central portion in the left-right direction. The front refrigerant tank portion (33) and the rear refrigerant tank portion (34) are divided into two spaces by a partition (43), respectively, so that the front side refrigerant port member (37) is separated from the front side. The refrigerant flowing into the right compartment of the refrigerant tank section (33) passes through all the refrigerant flow pipe sections (35) and the communication section (39), and the left compartment of the rear refrigerant tank section (34). After entering, it flows out through the refrigerant outlet member (38).

  The U-shaped bent flat tube (42) is formed by bending both sides of the central portion in the length direction of one straight aluminum flat element tube in the same direction so as to form a right angle to the original element tube. And two straight pipe portions (44) located in the same vertical plane, and a connecting portion (45) consisting of an unbent remaining portion of the original raw pipe and connecting both straight pipe portions (44). (See FIG. 10). Both straight pipe parts (44) of the U-shaped bent flat tube (42) serve as a refrigerant flow pipe part (35), and the connection part (45) serves as a communication part (39). ) Are brazed to both refrigerant tank portions (33) and (34) of the header tank (41) in a continuous manner.

  The regenerator (32) has substantially the same configuration as that obtained by rotating the evaporator (31) 180 degrees around a straight line extending in the front-rear direction, and the same reference numerals are given to the respective parts. Here, the refrigerant tank parts (33) and (34) are the regenerator material tank parts, the refrigerant flow pipe part (35) is the regenerator material enclosure pipe part, and the communication part (39) is the upper end of the regenerator material enclosure pipe part (35). Each part is a communication part that lets each part through. The difference between the regenerator (32) and the evaporator (31) is that a regenerator material injection member (46) is provided at the right end of the front regenerator material tank unit (33) and a rear regenerator material tank unit ( (34) that the air vent member (47) is provided at the right end, the refrigerant inlet member (37) and the refrigerant outlet member (38) are not provided, and the front and rear regenerator tank portions (33) (34) The inside is not divided into two spaces by a partition. The refrigerant tank section (33) (34) of the evaporator (31) is located above the communication section (39) of the regenerator (32) (outside in the length direction of the regenerator material enclosing pipe section (35)). The regenerator tank part (33) (34) of the regenerator (32) is disposed below the communication part (39) of the evaporator (31) (outside in the length direction of the refrigerant flow pipe part (35)). ing.

  As the regenerator material enclosed in the regenerator (32), it is preferable to use a water-based or paraffinic material whose freezing point is adjusted to about 3 to 10 ° C. In addition, the amount of the regenerator material enclosed in the regenerator (32) should be an amount that fills the entire regenerator material enclosing tube portion (35) up to the upper end and the communication portion (39). . The regenerator material injection member (46) and the air vent member (47) are closed after the regenerator material is enclosed in the regenerator (32).

  Refrigerant circulation pipe part (35) and communication part (39) of U-shaped bent flat tube (42) of evaporator (31) and regenerator enclosing pipe part (35) of U-shaped bent flat tube (42) of regenerator (32) ) And the communication part (39) are arranged in the left-right direction (the length direction of the refrigerant tank parts (33) (34) and the regenerator material tank parts (33) (34)) and in contact with each other. They are brazed together. The regenerator (32) has substantially the same configuration as that obtained by rotating the evaporator (31) by 180 degrees around a straight line extending in the front-rear direction, so the U-shaped bent flat tube (42) of the evaporator (31) The connecting portion (45) of the regenerator (32) and the U-shaped bent flat tube (42) of the regenerator (32) face away from the connecting portion (45). Here, the U-shaped bent flat tube of the evaporator (31) (42 The connecting portion (45) of the regenerator (32) faces the right side, and the connecting portion (45) of the U-shaped bent flat tube (42) faces the left side. The U-shaped bent flat tube (42) of the regenerator (32) is positioned on the left side of the U-shaped bent flat tube (42) of the evaporator (31). Part (44)) and communication part (39) (connecting part (45)) are on the right side of the refrigerant flow pipe part (35) (straight pipe part (44)) and communication part (39) (connecting part (45)) It is brought into contact with the left side of and brazed. Refrigerant flow pipe part (35) and communication part (39) of evaporator (31), and regenerator enclosing pipe part (35) and communication part (39) of regenerator (32) in contact with refrigerant flow pipe part (35) The pair (48) is formed with an interval in the left-right direction, and between the adjacent pairs (48) is a ventilation gap (49), and the refrigerant flow in the ventilation gap (49) Corrugated outer fins (51) made of aluminum are arranged in the part corresponding to the pipe part (35) and the regenerator material enclosing pipe part (35) to the refrigerant flow pipe part (35) and the regenerator material enclosing pipe part (35). It is brought into contact and brazed. The width of the outer fin (51) in the front-rear direction is determined by the refrigerant flow from the front edge of the evaporator (31) and the front refrigerant circulation pipe (35) of the regenerator (32) and the front cold storage material enclosing pipe (35). The distance between the pipe part (35) and the rear edge of the rear regenerator material enclosing pipe part (35) is approximately equal to the distance between the front and rear refrigerant flow pipe parts (35) and the front and rear regenerator material enclosing pipe parts (35). ing.

  Corrugated outer fins (51) made of aluminum are also arranged outside the refrigerant circulation pipe part (35) at the right end of the evaporator (31) and the cold storage material enclosing pipe part (35) at the left end of the regenerator (32). The refrigerant circulation pipe part (35) and the cold storage material sealing pipe part (35) are brazed. Also, aluminum side plates (52) are arranged outside the outer fins (51) at both left and right ends, and are brazed to the outer fins (51).

  The evaporator (31) of the cold storage heat exchanger (30) 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 a refrigerant that has passed through the condenser. A car air conditioner is configured with an expansion valve (pressure reducer) for reducing the pressure of the air conditioner. In the car air conditioner, 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 is stored cold through the refrigerant inlet member (37). Heat exchanger (30) evaporator (31) front refrigerant tank section (33) right compartment, rear refrigerant tank section (34) through all U-shaped bent flat tubes (42) And then flows out through the refrigerant outlet member (38). Then, while the refrigerant flows in the refrigerant circulation pipe part (35), heat exchange is performed with the air passing through the ventilation gap (49), and the air is cooled and the refrigerant flows out as a gas phase.

  At this time, the cold heat of the refrigerant flowing in the refrigerant flow pipe part (35) and the communication part (39) of the evaporator (31) passes through the pipe wall of the U-shaped bent flat tube (42), and the refrigerant flow pipe part (35) and the regenerator material enclosed pipe part (35) of the regenerator (32) and the regenerator material in the communication part (39) and the regenerator material forming a pair (48) with the communicator part (39). Solidifies and cold energy is stored.

  When the compressor stops, the cold heat of the regenerator material in the regenerator (32) and the regenerator material in the communication part (39) is brazed to the regenerator material tube (35). It is transmitted to the air passing through the ventilation gap (49) through the outer fin (51). Therefore, even if the temperature of the wind that has passed through the evaporator (31) rises, the wind is cooled, so that a rapid decrease in the cooling capacity is prevented.

  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): Cold storage heat exchanger
(2) (31): Evaporator
(3) (32): Regenerator
(4) (5) (33) (34): Refrigerant tank (cool storage material tank)
(6) (35): Refrigerant circulation pipe part (cool storage material enclosure pipe part)
(7) (36): Refrigerant circulation pipe group (cool storage material enclosing pipe group)
(11) (39): Communication part
(12): Flat hollow body
(13): Plate
(14): Tank formation part
(25) (48): A set consisting of a refrigerant circulation pipe part and a cold storage material enclosing pipe part
(26) (49): Ventilation gap
(27) (51): Outer fin
(41): Header tank
(42): U-shaped bent flat tube
(44): Straight pipe
(45): Connection part

Claims (5)

The evaporator and the regenerator in which the regenerator material is enclosed, and the evaporator is arranged with the refrigerant tank portion and the width direction in the front-rear direction and at an interval in the length direction of the refrigerant tank portion, and one end A plurality of flat refrigerant flow pipe parts connected to the refrigerant tank part, and the regenerator is spaced apart from the refrigerant tank part and is located closer to the refrigerant flow pipe part than the other end part of the refrigerant flow pipe part. A tank part for the regenerator material arranged on the outer side in the length direction, and a distance direction in the length direction of the tank part for the regenerator material, with the width direction directed in the front-rear direction, and one end portion of the tank part for the regenerator material A plurality of flat regenerator enclosing pipes that are communicated with each other and extending to the refrigerant header part side, and the refrigerant circulation pipe part of the evaporator and the regenerator enclosing pipe part of the regenerator include the refrigerant tank Section and tank section for regenerator material Cold storage heat exchanger which is brought into contact with each other with aligned in the longitudinal direction. A set consisting of the refrigerant circulation pipe part of the evaporator and the regenerator material enclosing pipe part of the regenerator in contact with the refrigerant circulation pipe part is provided at intervals in the length direction of the refrigerant tank part and the regenerator material tank part. The regenerative heat exchanger according to claim 1, wherein between the adjacent pairs is a ventilation gap, and fins are arranged in the ventilation gap. The front and rear refrigerant circulation pipe parts are composed of two refrigerant tank parts provided with evaporators arranged side by side in the front-rear direction and a plurality of refrigerant circulation pipe parts arranged at intervals in the length direction of the refrigerant tank part. One end of each refrigerant flow pipe part group is connected to each refrigerant tank part, and the refrigerant flow pipe parts of both front and rear refrigerant flow pipe part groups are arranged in the front-rear direction. The other end portions of the two refrigerant flow pipe portions arranged in the front-rear direction are communicated with each other through the communication portion, and the regenerator has two regenerator tank portions provided side by side in the front-rear direction, The regenerator material is provided with two or more regenerator material enclosing tube groups composed of a plurality of regenerator material enclosing tube parts arranged at intervals in the length direction of the regenerator material tank part, and each regenerator material is enclosed in each regenerator material tank part One end of the regenerator material enclosing tube part of the tube group is connected, and both front and rear regenerator materials are enclosed The regenerator material enclosing tube portions of the subgroup are arranged in the front-rear direction, and the other end portions of the two regenerator material enclosing tube portions arranged in the front-rear direction are communicated with each other through the communication portion, and for the refrigerant of the evaporator The tank part is arranged on the outer side in the length direction of the regenerator material enclosing pipe part from the communication part of the regenerator, and the regenerator material tank part of the regenerator is located on the outer side in the length direction of the refrigerant circulation pipe part than the communication part of the evaporator. The regenerative heat exchanger according to claim 1 or 2, which is arranged. The evaporator is formed by stacking a plurality of flat hollow bodies made of two plates whose peripheral portions are brazed, and each flat hollow body is arranged in the front-rear direction between the two plates. Two swelled refrigerant circulation pipe portions formed and a bulge shape formed so as to be connected to one end of both refrigerant circulation pipe portions between the two plates and having a bulge height higher than that of the refrigerant circulation pipe portions An adjacent flat hollow body comprising a header forming portion and a bulging communication portion formed so as to be connected to the other end of both refrigerant flow pipe portions and between the two plates and to be passed through both refrigerant flow pipe portions. The header forming portions are joined together, and the refrigerant tank portion is formed by the header forming portion of the all flat hollow body,
The regenerator is formed by laminating a plurality of flat hollow bodies composed of two plates whose peripheral portions are brazed to each other, and each flat hollow body is arranged in the front-rear direction between the two plates. Are formed so as to be connected to one end of both of the regenerator material enclosing tube parts between the two plates and having a bulge height higher than that of the regenerator material enclosing tube part. It has a high bulge-like header forming part and a bulge-like communicating part formed between the two plates so as to be connected to the other end of both the regenerator material enclosing tube parts and through both the regenerator material enclosing tube parts The regenerator heat exchanger according to claim 3, wherein header forming parts of adjacent flat hollow bodies are joined together and a tank part for a regenerator material is formed by the header forming parts of all flat hollow bodies. The evaporator is composed of a header tank in which both front and rear refrigerant tanks are integrated, and a U-shaped bent flat tube having both ends connected to each refrigerant tank portion of the header tank. A U-shaped bent flat tube that is formed by bending a flat tube at an intermediate portion in the length direction, and is composed of two straight pipe portions located in the same plane and a connecting portion that connects both straight pipe portions. Both straight pipe parts of the refrigerant flow pipe part and the connecting part is a communication part,
The regenerator consists of a header tank in which the front and rear regenerator tank parts are integrated, and a U-shaped bent flat tube with both ends connected to each regenerator tank part of the header tank, and the U-shaped bent flat tube is It is formed by bending one flat tube at the middle part in the length direction, and is composed of two straight pipe parts located in the same plane and a connecting part that connects both straight pipe parts, and is U-shaped. 4. The regenerative heat exchanger according to claim 3, wherein both straight pipe portions of the bent flat tube serve as a regenerator material enclosing pipe portion, and the connecting portion serves as a communicating portion.

Images