JP2014020663A - Cold storage heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cold storage heat exchanger capable of inhibiting the increase of internal pressure of a cold storage material container while preventing a cold storage material from flowing out to the exterior.SOLUTION: A cold storage heat exchanger includes a cold storage material container 47 which is joined to a tube 45 having a refrigerant passage and defines a room for storing a cold storage material. In the cold storage heat exchanger, the cold storage material container 47 includes a penetration member 53 which allows a gas to pass therethrough and does not allow the cold storage material in a liquid state to pass. Even if a gas occurs due to decay etc. in the cold storage material container 47 and the internal pressure increases, the structure allows the gas to flow out from the penetration member 53 to the exterior. At that time, the cold storage material in the liquid state does not flow out from the penetration member 53. Thus, the cold storage heat exchanger inhibits the increase of the internal pressure of the cold storage material container 47 while preventing the cold storage material from flowing out to the exterior.

Description

  The present invention relates to a cold storage heat exchanger used in a refrigeration cycle apparatus.

  Conventionally, a refrigeration cycle apparatus is used as an air conditioner. Attempts have been made to provide limited cooling even when the refrigeration cycle apparatus is stopped. For example, in a vehicle air conditioner, a compressor of a refrigeration cycle apparatus is driven by a traveling engine. For this reason, if the engine stops while the vehicle is temporarily stopped, the refrigeration cycle apparatus stops.

  In order to provide limited cooling during such a temporary stop, a cold storage heat exchanger in which a cold storage material for storing cold heat is added to the evaporator of the refrigeration cycle apparatus is disclosed (for example, Patent Document 1). reference). The cold storage heat exchanger includes a cold storage material container that is joined to a refrigerant pipe through which the refrigerant flows, and after the cold storage material is sealed in the cold storage material container, the sealed portion is sealed in the cold storage material container. Cold storage material is housed.

  Here, as a conventional sealing technique, the tip portion of the enclosing pipe is crushed into a V-shaped section or a U-shaped section, and the crushed end surface is sealed with welding or solder to completely seal the sealing portion. A technique has been proposed (see, for example, Patent Document 2).

JP 2011-12947 A JP 2003-194649 A

  By the way, in a cool storage heat exchanger (evaporator), a surface treatment process is performed before sealing a cool storage material container, and after that, the cool storage material container is sealed. For this reason, the acid which is a corrosion acceleration | stimulation substance penetrate | invades in a cool storage material container in a surface treatment process etc., and a cool storage material container may be sealed as it is.

  Therefore, when the sealing technique described in Patent Document 2 is applied to the sealing of the cool storage material container, the cool storage material container is completely sealed. The internal pressure of the gas increases and expands and deforms, and in the worst case, there is a risk of damage. Moreover, even if it does not lead to breakage, there is a problem that the outer fin joined to the cold storage tube of the cold storage heat exchanger is crushed by the expansion and deformation of the cold storage material container, and the heat exchange performance is deteriorated.

  An object of this invention is to provide the cool storage heat exchanger which can suppress the raise of the internal pressure of a cool storage material container, preventing the outflow to the exterior of a cool storage material in view of the said point.

  In order to achieve the above object, in the invention described in claim 1, cold storage heat provided with a cold storage material container (47) that is joined to a refrigerant pipe (45) having a refrigerant passage and that partitions a room for storing the cold storage material. In the exchanger, the cool storage material container (47) has pressure relief means (53, 54, 57, 60) through which gas passes but does not pass the liquid cool storage material.

  According to this, pressure relief means (53, 54) is provided in the cold storage container (47) by providing pressure relief means (53, 54, 57, 60) through which gas passes but liquid state cold storage material does not pass. 57, 60), it is possible to prevent the cool storage material in the liquid state from flowing out to the outside while allowing the gas to flow out to the outside. For this reason, even if gas is generated due to corrosion or the like in the cold storage material container (47) and the internal pressure increases, the gas can flow out from the pressure relief means (53, 54, 57, 60). At this time, the cool storage material in the liquid state does not flow out from the pressure relief means (53, 54, 57, 60). Therefore, an increase in the internal pressure of the cool storage material container (47) can be suppressed while preventing the cool storage material from flowing out.

  In addition, the code | symbol in the bracket | parenthesis of each means described in this column and the claim shows the correspondence with the specific means as described in embodiment mentioned later.

It is a block diagram of the refrigerating cycle apparatus which comprises the vehicle air conditioner in 1st Embodiment. It is a top view of the evaporator of a 1st embodiment. It is the figure seen from the arrow X direction of FIG. (A) is the partial transmission top view which looked at the cool storage material container in 1st Embodiment from the tube lamination direction, (b) is the partial transmission front view which looked at the cool storage material container in 1st Embodiment from the air flow direction. is there. It is an expansion perspective view which shows the cool storage material container in 1st Embodiment. It is a perspective view which shows the enclosure part 50 in 1st Embodiment. It is AA sectional drawing of FIG. It is a graph which shows the change of the internal pressure (theoretical value) which balances with the surface tension of the cool storage material in a space | gap part with respect to the change of the hole diameter of a space | gap part. It is an enlarged front view which shows the cool storage material container 47 vicinity in 1st Embodiment. It is an expanded sectional view showing enclosure part 50 in a 2nd embodiment. It is BB sectional drawing of FIG. It is an expanded sectional view showing enclosure part 50 in a 3rd embodiment. It is CC sectional drawing of FIG. It is an expanded sectional view showing the caulking part neighborhood of the pipe for enclosure in a 4th embodiment. It is an expanded sectional view showing the caulking part neighborhood of the pipe for enclosure in a 5th embodiment. It is an expanded sectional view showing enclosure part 50 in a 6th embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following embodiments, the same or equivalent parts are denoted by the same reference numerals in the drawings.

(First embodiment)
The structure of the refrigerating cycle apparatus which comprises the vehicle air conditioner used as 1st Embodiment of this invention is shown in FIG. The refrigeration cycle apparatus 1 constituting the air conditioner includes a compressor 10, a radiator 20, a decompressor 30, and an evaporator (evaporator) 40. These components are connected in an annular shape by piping and constitute a refrigerant circulation path.

  The compressor 10 is driven by an internal combustion engine (or an electric motor or the like) that is a power source 2 for traveling the vehicle. When the power source 2 stops, the compressor 10 also stops. The compressor 10 sucks the refrigerant from the evaporator 40, compresses it, and discharges it to the radiator 20. The radiator 20 cools the high-temperature refrigerant. The radiator 20 is also called a condenser. The decompressor 30 decompresses the refrigerant cooled by the radiator 20. The evaporator 40 evaporates the refrigerant decompressed by the decompressor 30 and cools the passenger compartment air.

  2 and 3, the evaporator 40 includes a first heat exchange unit 48 and a second heat exchange unit 49 arranged in two layers. And the 2nd heat exchange part 49 is arrange | positioned at the air flow upstream, and the 1st heat exchange part 48 is arrange | positioned at the air flow downstream.

  Specifically, the evaporator 40 has a refrigerant passage member branched into a plurality. The refrigerant passage member is provided by a metal passage member such as aluminum. The refrigerant passage member is provided by first to fourth headers 41 to 44 positioned in pairs and a plurality of tubes 45 as refrigerant pipes connecting the headers 41 to 44.

  The first header 41 and the second header 42 form a pair, and are arranged in parallel at a predetermined distance from each other. The third header 43 and the fourth header 44 also form a pair, and are arranged in parallel at a predetermined distance from each other. A plurality of tubes 45 are arranged at equal intervals between the first header 41 and the second header 42. Each tube 45 communicates with the corresponding header 41, 42 at its end. A first heat exchanging portion 48 (see FIG. 3) is formed by the first header 41, the second header 42, and a plurality of tubes 45 arranged therebetween.

  A plurality of tubes 45 are arranged at equal intervals between the third header 43 and the fourth header 44. Each tube 45 communicates with the corresponding header 43, 44 at its end. A second heat exchanging portion 49 (see FIG. 3) is formed by the third header 43, the fourth header 44, and a plurality of tubes 45 arranged therebetween.

  A joint (not shown) serving as a refrigerant inlet is provided at the end of the first header 41. The inside of the first header 41 is partitioned into a first partition and a second partition by a partition plate (not shown) provided substantially at the center in the length direction. Correspondingly, the plurality of tubes 45 are divided into a first group and a second group.

  The refrigerant is supplied to the first section of the first header 41. The refrigerant is distributed from the first section to the plurality of tubes 45 belonging to the first group. The refrigerant flows into the second header 42 through the first group and is collected. The refrigerant is distributed again from the second header 42 to the plurality of tubes 45 belonging to the second group. The refrigerant flows into the second section of the first header 41 through the second group. Thus, in the 1st heat exchange part 48, the flow path which flows a refrigerant | coolant in a U shape is formed.

  A joint (not shown) serving as a refrigerant outlet is provided at the end of the third header 43. The inside of the third header 43 is partitioned into a first partition and a second partition by a partition plate (not shown) provided substantially at the center in the length direction. Correspondingly, the plurality of tubes 45 are divided into a first group and a second group. The first section of the third header 43 is adjacent to the second section of the first header 41. The first section of the third header 43 and the second section of the first header 41 are in communication.

  The refrigerant flows from the second section of the first header 41 into the first section of the third header 43. The refrigerant is distributed from the first section to the plurality of tubes 45 belonging to the first group. The refrigerant flows into the fourth header 44 through the first group and is collected. The refrigerant is distributed again from the fourth header 44 to the plurality of tubes 45 belonging to the second group. The refrigerant flows into the second section of the third header 43 through the second group. Thus, also in the 2nd heat exchange part 49, the flow path which flows a refrigerant | coolant in a U shape is formed. The refrigerant in the second section of the third header 43 flows out from the refrigerant outlet and flows toward the compressor 10.

  In FIG. 2, the plurality of tubes 45 are arranged at substantially constant intervals. A plurality of gaps are formed between the plurality of tubes 45. A plurality of air-side fins 46 and a plurality of cool storage material containers 47 are arranged and brazed with a predetermined regularity in the plurality of gaps. A part of the gap is a cooling air passage 460. The remaining part of the gap is an accommodating part in which the cool storage material container 47 is arranged.

  10% or more and 50% or less of the total interval formed between the plurality of tubes 45 is the accommodating portion. The cool storage material containers 47 are arranged almost uniformly distributed throughout the evaporator 40. The two tubes 45 located on both sides of the cold storage material container 47 define a cooling air passage 460 for exchanging heat with air on the opposite side to the cold storage material container 47.

  The tube 45 is a multi-hole tube formed in a flat shape and having a plurality of refrigerant passages therein. The tube 45 can be obtained by an extrusion manufacturing method. The plurality of refrigerant passages extend along the longitudinal direction of the tube 45 and open at both ends of the tube 45. The plurality of tubes 45 are arranged in a row. In each row, the plurality of tubes 45 are arranged such that their main surfaces (flat surfaces) face each other.

  The evaporator 40 includes air-side fins 46 in the cooling air passage 460 for increasing the contact area with the air supplied to the passenger compartment. The air-side fins 46 are disposed in an air passage that is defined between two adjacent tubes 45. The air side fin 46 is thermally coupled to the two adjacent tubes 45.

  The air-side fins 46 are joined to the two adjacent tubes 45 by a brazing material. The air-side fin 46 is formed by bending a thin metal plate such as aluminum into a wave shape, and includes an armor window-like louver (not shown).

  When the evaporator 40 evaporates the refrigerant in the evaporator 40 and exhibits an endothermic effect, the evaporator 40 solidifies the regenerator material to store the cold energy, and cools the stored heat when the regenerator material melts. It is an exchanger. The evaporator 40 has a cool storage material container 47 that partitions a room for storing a plurality of cool storage materials.

  As shown in FIGS. 4 and 5, the regenerator container 47 is made of metal such as aluminum and is formed in a flat container shape. The cool storage material container 47 divides a room for storing the cool storage material inside by joining a pair of plate members 470 having a substantially U-shaped cross section (bathtub shape) in the middle. The cool storage material container 47 has a wide main surface (flat surface) on both surfaces. The two main walls that provide these two main surfaces are each arranged in parallel with the tube 45. These two main walls have an uneven shape.

  The cool storage material container 47 is disposed between two adjacent tubes 45. The cold storage material container 47 is thermally coupled to the two tubes 45 disposed on both sides thereof by the convex portions 47a.

  The cool storage material container 47 is joined to the two adjacent tubes 45 by a joining material excellent in heat transfer. As the bonding material, a resin material such as a brazing material or an adhesive can be used. The cold storage material container 47 of this example is brazed to the tube 45.

  A brazing material is arranged between the cold storage material container 47 and the tube 45 in order to connect them with a wide cross-sectional area. This brazing material can also be provided by arranging a brazing foil between the cold storage material container 47 and the tube 45. As a result, the cool storage material container 47 performs good heat conduction with the tube 45.

  On the inner side of the cool storage material container 47, an inner fin (not shown) is thermally and mechanically coupled to the cool storage material container 47. This inner fin is joined to the inner wall of the main wall of the cool storage material container 47 by a joining material excellent in heat transfer. This joining is made by brazing. Since the inner fin is coupled to the inner side of the cold storage material container 47, deformation of the cold storage material container 47 is prevented, and pressure resistance is improved.

  On the upper side in the vertical direction of the main wall of the cold storage material container 47, a recessed portion 47 b that is recessed inside the cold storage material container 47 is formed. The recess 47 b functions as a stopper that prevents the inner fin from shifting upward in the cold storage material container 47.

  An enclosing portion 50 for enclosing the regenerator material in the regenerator container 47 is provided at the upper end in the vertical direction of the regenerator container 47. The enclosing unit 50 includes an enclosing pipe 51 as a passage forming member that forms a cool storage material passage 500 through which the cool storage material circulates when sealed. One end side of the enclosing pipe 51 is connected to the regenerator material container 47, and the regenerator material is encapsulated from the other end side of the enclosing pipe 51. As shown in FIG. 4, the enclosing pipe 51 of the enclosing portion 50 is connected to a position where gas exists in the cold storage material container 47 when the evaporator 40 is mounted on a vehicle.

  As shown in FIGS. 6 and 7, the enclosing portion 50 includes a caulking portion 52 in which the tip end portion of the enclosing pipe 51 is crushed into a substantially U-shaped cross section (plastically deformed). The caulking portion 52 is disposed at the other end side of the enclosing pipe 51, that is, at an upstream end portion in the cool storage material flow direction during enclosing in the enclosing pipe 51.

  A permeable member 53 that selectively transmits only the gas out of the liquid state regenerator material and gas is provided inside the enclosing pipe 51 in the caulking portion 52, that is, between the inner wall surfaces of the enclosing pipe 51. . In other words, the enclosing portion 50 has a caulking portion 52 in which the enclosing pipe 51 is plastically deformed by pressing the enclosing pipe 51 from the outside in a state where the transmitting member 53 is disposed in the enclosing pipe 51. doing. The transmissive member 53 has a gap portion that is large enough to allow only a gas to pass between the liquid state regenerator material and the gas.

  Here, if the internal pressure is equal to or lower than the surface tension of the liquid state cold storage material in the gap, the liquid state cold storage material does not flow out of the gap. On the other hand, when the internal pressure becomes larger than the surface tension of the liquid cold storage material in the gap, the liquid cold storage material flows out of the gap.

  Here, FIG. 8 shows the change in internal pressure (theoretical value) that balances the surface tension of the regenerator material in the gap with respect to the change in the hole diameter of the gap. In addition, the square plot in FIG. 8 shows the case where the regenerator material is water (surface tension: 0.073 N / m), and the rhombus plot shows the regenerator material is paraffin (surface tension: 0.026 N / m). Shows the case.

  According to the inventors' experiment, it is known that the internal pressure of the cool storage material container 47 is about 30 to 50 kPa at the maximum. For this reason, as shown in FIG. 8, the hole diameter of the gap portion of the transmission member 53 is preferably set to 10 μM or less, and more preferably set to 3 μM or less.

  As described above, by providing the permeable member 53 having a gap portion of a size that allows only gas out of the liquid state regenerator material and gas to pass through the enclosing portion 50, the gas is supplied from the permeable member 53. It is possible to prevent the liquid state cold storage material from flowing out while flowing out.

  For this reason, even if gas is generated in the cold storage material container 47 due to corrosion or the like and the internal pressure increases, the gas can flow out of the cold storage material container 47 from the transmission member 53. At this time, the liquid cold storage material does not flow out of the transmission member 53. Therefore, an increase in the internal pressure of the cold storage material container 47 can be suppressed while preventing the cold storage material from flowing out, and deformation / breakage of the cold storage material container 47 can be suppressed. For this reason, the transmission member 53 of the present embodiment functions as a pressure relief means.

  By the way, since the space | gap part of the permeation | transmission member 53 is a fine hole which only gas permeate | transmits and does not permeate | transmit a liquid regenerator material, the permeation | transmission member 53 is below the liquid level of the liquid regenerator material in the regenerator container 47. If present on the side, the gas is less likely to leak to the outside from the gap of the transmission member 53, and the function of releasing the pressure is reduced.

  On the other hand, in this embodiment, when the evaporator 40 is mounted on the vehicle, the sealing pipe 51 of the sealing part 50 is connected to the position where the gas in the cold storage material container 47 exists, so that the pressure relief is provided. When the evaporator 40 is mounted on a vehicle, the permeable member 53 as a means is also arranged at a position where gas exists in the cold storage material container 47. For this reason, since gas can be reliably flowed outside from the permeation | transmission member 53, the raise of the internal pressure of the cool storage material container 47 can be suppressed reliably.

  Moreover, in this embodiment, the pipe 51 for enclosure is employ | adopted as a channel | path formation member which forms the cool storage material channel | path through which a cool storage material distribute | circulates at the time of enclosure in the enclosure part 50. FIG. Since the sealing pipe 51 has a circular outer shape and high surface roughness on both the inner surface and the outer surface, it is easy to perform sealing when the regenerator material is encapsulated or when the regenerator material container 47 is inspected for leakage (airtight inspection). Further, since the outer shape of the sealing pipe 51 is circular, stable caulking sealing can be realized.

  By the way, if there is a structure such as an inner fin in the vicinity of the enclosing portion 50 inside the cool storage material container 47, when the cool storage material is sealed from the sealing portion 50, the cool storage material will rebound on the structure, and the enclosure Sexuality gets worse. On the other hand, in the present embodiment, the recess 47b is formed on the upper side in the vertical direction of the main wall of the cool storage material container 47, so that the inner fin is displaced upward in the cool storage material container 47, that is, in the vicinity of the enclosing portion 50. I am trying not to. For this reason, the enclosure property of a cool storage material can be improved.

  By the way, at the time of manufacture of the evaporator 40, the tube 45, the air side fin 46, and the cool storage material container 47 are laminated | assembled as shown in FIG. 2, and a core part (the 1st heat exchange part 48 and the 2nd heat exchange part 49). After assembling, the core portion is inserted into the first to fourth headers 41 to 44 in a state in which the core portion is pressed from both ends in the stacking direction of the tubes 45.

  At this time, since the two tubes 45 are stretched by the air-side fins 46 at a portion where the air-side fins 46 are disposed between the two adjacent tubes 45, the pitch of the tubes 45 can be easily increased. . On the other hand, since the cool storage material container 47 is in contact with the adjacent tube 45 in the convex portion 47a, the contact area with the tube 45 is small. For this reason, when pressing the core portion from both ends in the stacking direction of the tubes 45, the tubes 45 disposed on both sides of the cool storage material container 47 are inclined toward the cool storage material container 47, and it is difficult to obtain a pitch between the tubes 45. Become. For this reason, it becomes difficult to insert the core portion into the first to fourth headers 41 to 44.

  On the other hand, in this embodiment, as shown in FIG. 9, the outer diameter of the sealing pipe 51 is A, the plate thickness of the plate member 470 forming the cold storage material container 47 is B, and between two adjacent tubes 45. When the distance is C, A, B, and C are set so as to satisfy the relationship of A + 2B = C. That is, the dimension of the cool storage material container 47 in the vicinity of the sealing portion 50 is set to be equal to the distance C between two adjacent tubes 45.

  Thereby, since it can suppress that the tube 45 arrange | positioned at the both sides of the cool storage material container 47 leans to the cool storage material container 47 side at the time of a core assembly, a core part is easily inserted in the 1st-4th headers 41-44. be able to. That is, core assemblability can be improved.

  By the way, at the time of manufacture of the evaporator 40, which of the cool storage material container 47 and the air side fin 46 is arrange | positioned between the adjacent tubes 45 is determined by desired cooling performance. When there is only one enclosure for enclosing the regenerator material in the plurality of regenerator containers 47, the plurality of regenerator containers 47 and the enclosure are connected by a regenerator passage through which the regenerator material circulates. Therefore, when changing the cooling performance of the evaporator 40, etc., even if it is going to change one cool storage material container 47 to the air side fin 46 among the plurality of cool storage material containers 47 connected to the cool storage material passage, Since the cold storage material container 47 is connected to the cold storage material passage, it cannot be easily changed.

  On the other hand, in this embodiment, as shown in FIG. 2, each of the plurality of cold storage material containers 47 includes an enclosing portion 50 having a caulking portion 52. According to this, since it is possible to complete the sealing of the cool storage material for each cool storage material container 47, the cool storage material container 47 is easily changed to the air-side fin 46 when the cooling performance of the evaporator 40 is changed. It becomes possible.

  Further, in the present embodiment, as shown in FIG. 3, the enclosing part 50 (enclosing pipe 51) is on the core surface of the evaporator 40, that is, the core part composed of the tube 45, the air side fin 46 and the cold storage material container 47. It is comprised so that it may protrude rather than the end surface of an air flow direction. As a result, the sealing of the encapsulating part 50 is facilitated, and the sealing can be performed with a simple structure, so that the manufacturing cost can be reduced. Furthermore, even when the cool storage material leaks from the sealing portion 50 when the cool storage material is sealed, the cool storage material is unlikely to adhere to the core surface of the evaporator 40, and the quality of the evaporator 40 is easily secured.

(Second Embodiment)
Next, a second embodiment of the present invention will be described based on FIG. 10 and FIG. The second embodiment is different from the first embodiment in the configuration of the pressure relief means. FIG. 10 corresponds to FIG. 7 of the first embodiment.

  As shown in FIGS. 10 and 11, the caulking portion 52 of the sealing pipe 51 is formed with a plurality of through holes 54 that allow the cold storage material passage 500 in the sealing pipe 51 to communicate with the outside. The through-hole 54 is formed in a size that allows only a gas to pass through among the liquid regenerator material and the gas. That is, the through hole 54 is formed to have the same size as the gap portion of the transmission member 53 in the first embodiment.

  Specifically, in the present embodiment, a notch portion 55 extending in the flow direction of the regenerator material is formed at the end of the cooling pipe flow upstream side in the enclosing pipe 51. The caulking portion 52 is formed by pressing the portion of the sealing pipe 51 where the cutout portion 55 is formed from the outside to plastically deform the sealing pipe 51. The through-hole 54 described above is formed by the notch 55 in the caulking portion 52 and the inner wall surface of the sealing pipe 51 facing the notch 55.

  As described above, by providing the caulking portion 52 of the sealing pipe 51 with a through hole 54 having a size that allows only the gas to pass between the liquid regenerator material and the gas, Can be discharged to the outside, and the liquid cold storage material can be prevented from flowing to the outside. For this reason, the through-hole 54 functions as a pressure relief means.

  At this time, in this embodiment, since the transmissive member 53 which is a separate member from the sealing pipe 51 can be eliminated, the same effect as the first embodiment can be obtained while reducing the number of parts. .

(Third embodiment)
Next, a third embodiment of the present invention will be described with reference to FIGS. The third embodiment is different from the second embodiment in the formation method of the through hole 54. FIG. 12 corresponds to FIG. 7 of the first embodiment.

  As shown in FIGS. 12 and 13, in this embodiment, a rod-shaped member 56 as a gas passage forming member that is a separate member from the sealing pipe 51 is disposed inside the sealing pipe 51 in the caulking portion 52. Has been. The rod-shaped member 56 extends in the flow direction of the regenerator material. One end of the rod-shaped member 56 is disposed in the cold storage material passage 500 of the sealing pipe 51, and the other end of the rod-shaped member 56 is disposed outside the sealing pipe 51.

  The caulking portion 52 of the present embodiment is formed by pressing the sealing pipe 51 from the outside in a state where the rod-shaped member 56 is disposed in the sealing pipe 51 and plastically deforming the sealing pipe 51. A through-hole 54 is formed between the outer wall surface of the rod-shaped member 56 and the inner wall surface of the sealing pipe 51 in the crimping portion 52 so as to communicate the cold storage material passage 500 with the outside. The through-hole 54 has such a size that only gas can pass through the liquid state regenerator material and gas.

  Therefore, according to this embodiment, the same effect as the second embodiment can be obtained. Further, it is not necessary to form a notch in the sealing pipe 51 in advance, and when the sealing pipe 51 is caulked, the through hole 54 can be formed by simply inserting the rod-shaped member 56 into the sealing pipe 51. Since it can be formed, the pressure relief means can be configured easily.

(Fourth embodiment)
Next, a fourth embodiment of the present invention will be described with reference to FIG. The third embodiment is different from the second embodiment in the formation method of the through hole 54. FIG. 14 corresponds to FIG. 11 of the second embodiment.

  As shown in FIG. 14, the caulking portion 52 of the sealing pipe 51 is formed with a plurality of through holes 54 that allow the cold storage material passage 500 in the sealing pipe 51 to communicate with the outside. Specifically, by pressing the sealing pipe 51 from the outside in a state where a through hole forming member (not shown) that is a separate member from the sealing pipe 51 is disposed in the sealing pipe 51, A caulking portion 52 is formed by plastically deforming the sealing pipe 51. The through hole 54 is formed by extracting the through hole forming member from the caulking portion 52 after the enclosing pipe 51 is plastically deformed. According to the present embodiment, it is possible to obtain the same effect as the second embodiment.

(Fifth embodiment)
Next, a fifth embodiment of the present invention will be described with reference to FIG. The fourth embodiment is different from the third embodiment in the formation method of the through hole 54. FIG. 15 corresponds to FIG. 13 of the third embodiment.

  As shown in FIG. 15, a through-hole 54 extending in the longitudinal direction is formed in the rod-shaped member 56 of the present embodiment. Through the through hole 54, the cold storage material passage 500 in the sealing pipe 51 communicates with the outside. The through-hole 54 has such a size that only the gas can pass through the liquid state regenerator material and the gas. Therefore, according to the present embodiment, the same effect as that of the third embodiment can be obtained.

(Sixth embodiment)
Next, a sixth embodiment of the present invention will be described with reference to FIG. The fifth embodiment is different from the first embodiment in the configuration of the pressure relief means. FIG. 16 corresponds to FIG. 7 of the first embodiment.

  As shown in FIG. 16, a through hole 60 is formed in the vicinity of the caulking portion 52 in the sealing pipe 51 of the sealing portion 50 so as to communicate the cold storage material passage 500 in the sealing pipe 51 with the outside. The through-hole 60 is formed in a size that allows only a gas to pass through the liquid state regenerator material and the gas. That is, the through hole 60 is formed to have the same size as the gap portion of the transmission member 53 in the first embodiment.

  As described above, by providing the through-hole 60 having a size that allows only gas out of the liquid state regenerator material and gas to pass in the vicinity of the caulking portion 52 of the sealing pipe 51, The gas can be discharged to the outside, and the liquid cold storage material can be prevented from flowing to the outside. Accordingly, the through hole 60 functions as a pressure relief means. For this reason, according to this embodiment, the same effect as the first embodiment can be obtained.

(Other embodiments)
The present invention is not limited to the above-described embodiment, and can be variously modified as follows without departing from the spirit of the present invention.

  (1) In each of the above embodiments, the example in which the caulking portion 52 is formed by compositionally deforming the tip end portion of the enclosing pipe 51 into a substantially U-shaped cross section has been described. You may form by carrying out a composition deformation | transformation of the front-end | tip part of 51 to a cross-sectional substantially V shape.

  (2) In the sixth embodiment, the example in which the through hole 60 is formed in the vicinity of the caulking portion 52 of the enclosing pipe 51 has been described. Alternatively, it may be formed in the cool storage material container 47 main body (plate member 470). At this time, when the through-hole 60 is mounted on the vehicle at the position where the gas exists in the cold storage material container 47 when the evaporator 40 is mounted on the vehicle, the gas can surely flow out from the transmission member 53 to the outside. Therefore, the increase in the internal pressure of the cold storage material container 47 can be reliably suppressed.

45 Tube (refrigerant tube)
47 Cold storage container 50 Enclosing part 51 Enclosing pipe (passage forming member)
52 Caulking part 53 Transmission member (pressure relief means)
54 Through-hole (pressure relief means)
500 Regenerator passage

Claims (9)

A cold storage heat exchanger comprising a cold storage material container (47) joined to a refrigerant pipe (45) having a refrigerant passage and defining a room for storing the cold storage material,
The cold storage material container (47) has pressure relief means (53, 54, 57, 60) through which gas passes but the liquid cold storage material does not pass. The regenerative heat exchanger according to claim 1 mounted on a vehicle,
The said pressure relief means (53, 54, 57, 60) is arrange | positioned in the position where gas exists in the said cool storage material container (47) at the time of mounting to the said vehicle, The cold storage heat exchanger characterized by the above-mentioned. The cold storage material container (47) is provided with an enclosure (50) for enclosing the cold storage material in the cold storage material container (47),
The enclosure (50)
A passage forming member (51) forming a cold storage material passage (500) through which the cold storage material circulates;
In the state where the passage forming member (51) is disposed with a transmission member (53) that selectively permeates only the gas among the liquid state regenerator material and gas, the passage forming member (51) is disposed from the outside. A caulking portion (52) obtained by plastic deformation of the passage forming member (51) by pressing,
The regenerative heat exchanger according to claim 1 or 2, wherein the pressure relief means is the permeable member (53). The cold storage material container (47) is provided with an enclosure (50) for enclosing the cold storage material in the cold storage material container (47),
The enclosure (50)
A passage forming member (51) forming a cold storage material passage (500) through which the cold storage material circulates;
A caulking part (52) obtained by plastically deforming the passage forming member (51) by pressing the passage forming member (51) from the outside;
The caulking portion (52) is formed with a through hole (54) that allows the cold storage material passage (500) to communicate with the outside.
The through hole (54) has a size that allows only the gas to pass through the liquid state regenerator material and gas,
The regenerative heat exchanger according to claim 1 or 2, wherein the pressure relief means is the through hole (54). The passage forming member (51) is formed with a notch (55) extending in the flow direction of the regenerator material,
The caulking portion (52) is formed by pressing the portion of the passage forming member (51) where the notch portion (55) is formed from the outside to plastically deform the passage forming member (51). And
The through hole (54) is formed by the notch (55) in the caulking part (52) and an inner wall surface of the passage forming member (51) facing the notch (55). The regenerative heat exchanger according to claim 4. The caulking part (52) moves the passage forming member (51) into the passage forming member (51) in a state where a through hole forming member which is a member different from the passage forming member (51) is disposed. It is formed by pressing from the outside and plastically deforming the passage forming member,
The said through-hole (54) is formed by extracting the said through-hole formation member from the said crimping | crimped part (52), after deforming the said channel | path formation member (51) plastically. 4. The cold storage heat exchanger according to 4. The caulking part (52) is configured such that the gas passage forming member (56), which is a member different from the passage forming member (51), is disposed in the passage forming member (51). 51) is pressed from the outside to plastically deform the passage forming member (51),
The said through-hole (54) is formed between the said channel | path formation member (51) and the said gas channel | path formation member (56) in the said crimping | crimped part (52), It is characterized by the above-mentioned. Cold storage heat exchanger. The cold storage material container (47) is provided with an enclosure (50) for enclosing the cold storage material in the cold storage material container (47),
The enclosure (50)
A passage forming member (51) forming a cold storage material passage (500) through which the cold storage material circulates;
The passage forming member (51) is pressed from the outside in a state where the through hole forming member (56) which is a member different from the passage forming member (51) is disposed in the passage forming member (51). And a caulking portion (52) obtained by plastic deformation of the passage forming member (51).
The through hole forming member (56) is formed with a through hole (57) for communicating the cold storage material passage (500) with the outside.
The said through-hole (57) is a magnitude | size of the grade which can pass only the said gas among the said cool storage materials and gas of a liquid state,
The regenerative heat exchanger according to claim 1 or 2, wherein the pressure relief means is the through hole (57). The cold storage material container (47) is formed with a through hole (60) for communicating the inside and the outside of the cold storage material container (47),
The through hole (60) has a size that allows only the gas to pass through the liquid state regenerator material and gas,
The regenerative heat exchanger according to claim 2, wherein the pressure relief means is the through hole (60).

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