JP2010139201A - Cold storage device and vehicle air conditioner using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cold storage device improving cold storage performance by increasing the amount of a cold storage medium. <P>SOLUTION: The cold storage device 4 includes a plurality of cold storage medium filling pipes 19 arranged in parallel with each other at intervals and corrugated fins 21 arranged between the adjacent cold storage medium filling pipes 19. The pipe height which is a dimension of the cold storage medium filling pipes 19 in the juxtaposing direction of the cold storage medium filling pipes 19 is set to exceed the fin height which is a dimension of the corrugated fins 21 in the juxtaposing direction of the cold storage medium filling pipes 19. For example, the pipe height is set to be 6-10 mm, and the fin height is set to be 3-6 mm. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a regenerator used in a vehicle that temporarily stops an engine that is a drive source of a compressor when the vehicle is stopped, for example, and a vehicle air conditioner using the regenerator.

  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, a normal vehicle having a refrigerant circulation path including 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. In the air conditioner for air conditioning, when the engine is stopped, the compressor using the engine as a driving source stops, so that the refrigerant is not supplied to the evaporator, and the cooling capacity is abruptly lowered.

  Therefore, as a vehicle air conditioner that has solved such problems, 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 air passage in the case are provided. 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 the regenerator is bent in a meandering manner What consists of an enclosure pipe and the fin arrange | positioned between the adjacent straight pipe parts of a meandering cold storage material enclosure pipe is known (refer patent document 1).

  Usually, as the regenerator material enclosed in the regenerator of the vehicle air conditioner described in Patent Document 1, a material that solidifies and melts at 3 to 7 ° C., such as paraffin, is used to ensure necessary regenerator performance. It is necessary to enclose many regenerator materials in the regenerator.

  By the way, in the vehicle air conditioner described in Patent Document 1, since the evaporator and the regenerator are arranged in one ventilation path in the case, the effective core areas of the evaporator and the regenerator are set to be approximately equal. The However, since the regenerator material enclosing tube is formed by bending a straight tube, there is a limit to reducing the bending radius of the bent part, so that the effective core areas of the evaporator and regenerator are almost equal. As a result, the number of straight pipe portions of the regenerator material enclosing tube is relatively small, and as a result, the amount of the regenerator material enclosed in the regenerator is insufficient, and the required regenerator performance cannot be obtained.

Moreover, it is conceivable to use a regenerator having a plurality of tubes arranged in parallel at intervals and fins arranged between adjacent tubes, similarly to an evaporator. However, in the evaporator, in order to ensure cooling performance, the tube height, which is the dimension in the tube arrangement direction of the tube, is set to 1.5 to 3.0 mm, and the fin height, which is the dimension in the tube arrangement direction of the fin. Is generally set to 4.0 to 7.5 mm or more (see Patent Document 2). However, when the evaporator described in Patent Document 2 is used as a regenerator, the tube height is lower than the fin height. Therefore, when the effective core areas of the evaporator and the regenerator are substantially equal, the number of regenerator enclosing tubes of the regenerator As a result, the amount of the regenerator material enclosed in the regenerator is insufficient, and the necessary regenerative performance cannot be obtained.
JP 2002-337537 A JP 2001-324290 A

  An object of the present invention is to solve the above-described problem and provide a regenerator having improved regenerator performance as compared with the regenerator described in Patent Document 1 and a vehicle air conditioner using the regenerator.

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

  1) A plurality of regenerator material enclosing tube portions arranged in parallel at intervals, and fins disposed between adjacent regenerator material enclosing tube portions, and a regenerator in the regenerator material enclosing tube portion The regenerator in which the pipe part height, which is the dimension in the arrangement direction of the material-enclosed pipe parts, is equal to or greater than the fin height, which is the dimension in the arrangement direction of the regenerator material-enclosed pipe parts in the fins.

  2) The regenerator according to 1) above, wherein the pipe part height is 6 to 10 mm, and the fin height is 3 to 6 mm.

  3) An evaporator disposed in the ventilation path in the case, and a regenerator disposed in the ventilation path on the downstream side in the ventilation direction of the evaporator, wherein the regenerator is the regenerator described in 1) or 2) above The air conditioner for vehicles which consists of, and the effective core area of an evaporator and the effective core area of a cool storage are equal.

  According to the regenerators 1) and 2) described above, when the effective core area is equal to the core area of the regenerator described in Patent Document 1, the amount of the regenerator material enclosed therein is changed to the regenerator described in Patent Document 1. The amount of the regenerator material enclosed in the can be increased. Therefore, compared with the regenerator described in Patent Document 1, the cold storage performance is improved.

  According to the vehicle air conditioner of 3) above, even if the effective core area of the regenerator is equal to the effective core area of the evaporator, the amount of the regenerator material enclosed in the regenerator is described in Patent Document 2. This can be increased compared to a regenerator having the same tube height and fin height as the evaporator. Therefore, compared with the vehicle air conditioner using the regenerator described in Patent Document 1, the cold storage performance is improved.

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

  In the following description, the downstream side in the ventilation direction (the direction indicated by the arrow X in FIGS. 1 and 2) is the front, the opposite side is the rear, and the top, bottom, left and right (FIG. 1, FIG. The top and bottom, left and right in FIGS. 3 and 4 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.

  1 and 2 show a partial configuration of a vehicle air conditioner using a regenerator according to the present invention, FIG. 3 shows an evaporator, and FIGS. 4 and 5 show a regenerator.

  1 and 2, the vehicle air conditioner includes an evaporator (3) disposed in the ventilation path (2) in the case (1) and a case (1) on the downstream side (front side) in the ventilation direction of the evaporator (3). ) And a regenerator (4) in which a regenerator material (not shown) is enclosed. Although not shown, the evaporator (3) 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).

  As shown in FIGS. 1 to 3, the evaporator (3) includes a pair of front header tank portions (5) and (6) that are spaced apart in the vertical direction, A pair of rear header tank portions (7) (8) arranged side by side on the rear side of the front header tank portions (5) (6) and between the front header tank portions (5) (6) and both rear headers Adjacent refrigerants with a plurality of refrigerant flow pipe parts (9) provided between the tank parts (7) and (8) with a space in the left-right direction and having both upper and lower ends communicated with the upper and lower header tank parts. And an aluminum corrugated fin (11) disposed between the flow pipe portions (9). A refrigerant inlet (12) is formed at the right end of the upper front header tank section (5), and a refrigerant outlet (13) is formed at the right end of the upper rear header tank section (7).

  The header tank parts (5), (6), (7), (8) and the refrigerant flow pipe part (9) of the evaporator (3) 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 (9) extending in the vertical direction, and formed at both ends of each refrigerant flow pipe part (9) and having a bulge height higher than that of the refrigerant flow pipe part (9) And a bulging header tank forming part (16). 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. The header tank portions (5), (6), (7), and (8) and the refrigerant flow pipe portion (9) are formed by brazing each other. Note that the refrigerant flowing in from the refrigerant inlet (12) flows out from the refrigerant outlet (13) through all the header tank parts (5) (6) (7) (8) and all the refrigerant flow pipe parts (9). In addition, the header tank portions (5), (6), (7), and (8) are partitioned into partitions arranged in the left-right direction by partition members at necessary portions. The corrugated fin (11) is disposed between the refrigerant flow pipe portions (9) of the adjacent flat hollow bodies (14) and brazed to the flat hollow bodies (14).

  As shown in FIG. 1, FIG. 2, FIG. 4 and FIG. 5, the regenerator (4) is composed of a pair of aluminum header tanks (17), (18) extending in the horizontal direction and spaced apart in the vertical direction. Between the two header tanks (17) and (18) with the width direction facing in the front-rear direction and spaced in the left-right direction, and the upper and lower ends brazed to the upper and lower header tanks (16) and (17). A plurality of flat aluminum regenerator encapsulated pipes (19) (cold regenerator encapsulated pipes) and between the adjacent regenerator encapsulated pipes (19) and outside the regenerator encapsulated pipes (19) at both left and right ends. Aluminum corrugated fins (21) brazed to the cold storage material enclosing pipe (19) and aluminum side plates that are placed outside the corrugated fins (21) at the left and right ends and brazed to the corrugated fins (21) (22) As the regenerator material enclosed in the regenerator (4), it is preferable to use a water-based, paraffin-based or the like whose freezing point is adjusted to about 3 to 7 ° C. Further, the amount of the regenerator material enclosed in the regenerator (4) is preferably an amount that fills the entire regenerator material enclosing pipe (19) up to the upper end.

  Here, the pipe height Ht (pipe part height), which is the dimension in the left-right direction of the regenerator material enclosing pipe (19) of the regenerator (4) (dimension in the arrangement direction of the regenerator material enclosing pipe (19)), is the corrugated It is equal to or greater than the fin height Hf, which is the dimension in the left-right direction of the fin (21) (dimension in the direction in which the regenerator material enclosure pipe (19) is arranged). For example, it is preferable that the tube height Ht is 6 to 10 mm and the fin height Hf is 3 to 6 mm. The tube height Ht 6 to 10 mm and the fin height Hf 3 to 6 mm are preferable because the core width W of the regenerator (4) is 160 to 300 mm, the core height L is 150 to 250, and the regenerator material enclosing tube (19). The width in the front-rear direction: 16 mm, the wall thickness of the peripheral wall of the regenerator material enclosing pipe (19): 0.5 mm, and the wall thickness of the corrugated fin (21) 0.1 mm.

  In addition, the effective core area of the regenerator (4), that is, the core height L (length L in the vertical direction of the corrugated fin (21)) × core width W (between the outer edges of the corrugated fins (21) at the left and right ends) The distance W) is the effective core area of the evaporator (3), that is, the core height L1 (length L1 in the vertical direction of the corrugated fin (11)) × core width W1 (left and right of the refrigerant flow pipe portions (9) at both left and right ends). It is preferably equal to the distance W1) between the directional outer surfaces. The corrugated fins (11) may be disposed outside the refrigerant flow pipe portions (9) at the left and right ends of the evaporator (3). In this case, the effective core area of the evaporator (3) is (corrugated The length (L1 in the vertical direction of the fin (11)) × (distance between the outer edge portions of the corrugated fins (11) at the left and right ends).

  In the vehicle air conditioner described above, 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 (3 ) In the upper front header tank section (5), and through the all header tank sections (5) (6) (7) (8) and all refrigerant flow pipe sections (9), the upper rear header tank section ( It flows out from the refrigerant outlet (13) of 6). Then, while the refrigerant flows in the refrigerant flow pipe part (9), heat exchange is performed with air (see arrows X in FIGS. 1 and 2) passing through the ventilation gap between the adjacent refrigerant flow pipe parts (9). However, the refrigerant flows out as a gas phase.

  At this time, the cooling air that has passed through the evaporator (3) is enclosed in the regenerator (4) to cool the regenerator material present in the regenerator material enclosure pipe (19), and as a result, the regenerator material is solidified to generate cold heat. Stored.

  When the compressor is stopped, the cold heat of the regenerator material in the regenerator (4) is transmitted to the wind passing through the evaporator (3) and the regenerator (4) via the corrugated fin (21). Therefore, even if the temperature of the wind that has passed through the evaporator (3) rises, the wind is cooled by the regenerator (4), so that a rapid decrease in cooling capacity is prevented.

  In the above embodiment, as the 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. A plurality of header tanks and a plurality of header tanks that are provided with a width direction in the front-rear direction and an interval in the length direction of the header tanks, and both ends communicated with both header tanks. A flat regenerator material enclosing tube portion, that is, a header tank portion and a regenerator material enclosing tube portion provided integrally 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 part having a plurality of flat regenerator enclosing pipes connected to both header tanks, that is, a header tank and a regenerator enclosing pipe formed separately may be used.

It is a perspective view which shows the structure of a part of vehicle air conditioner using the cool storage by this invention, separating an evaporator and a cool storage. It is a right view which shows the structure of a part of vehicle air conditioner using the cool storage by this invention. It is a front view which shows the evaporator of the vehicle air conditioner using the regenerator by this invention. It is a front view which shows the cool storage device by this invention. FIG. 5 is an enlarged vertical sectional view showing a part of FIG. 4.

Explanation of symbols

(1): Case
(2): Ventilation path
(3): Evaporator
(4): Regenerator
(19): Cold storage material enclosure tube (cold storage material enclosure tube)
(21): Corrugated fin
Ht: Tube height (tube height)
Hf: Fin height

Claims (3)

It is provided with a plurality of regenerator material enclosing tube parts arranged in parallel at intervals, and fins arranged between adjacent regenerator material enclosing tube parts, and the regenerator material enclosure in the regenerator material enclosing tube part The regenerator in which the pipe part height, which is the dimension in the arrangement direction of the pipe parts, is equal to or greater than the fin height, which is the dimension in the arrangement direction of the regenerator material-enclosed pipe parts in the fins. The regenerator according to claim 1, wherein the pipe part height is 6 to 10 mm, and the fin height is 3 to 6 mm. An evaporator disposed in the ventilation path in the case, and a regenerator disposed in the ventilation path on the downstream side in the ventilation direction of the evaporator, the regenerator comprising the regenerator according to claim 1 or 2, A vehicle air conditioner in which the effective core area of the evaporator is equal to the effective core area of the regenerator.

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