JP2014196047A - Evaporator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an evaporator capable of ensuring a degree of freedom for an installation position of a cold storage agent tank part.SOLUTION: In an evaporator, a plurality of first tubes each including a refrigerant channel and a plurality of second tubes 21A each including a cold storage agent accommodation path are arranged in parallel, an upper refrigerant tank part 23 and a lower refrigerant tank part 24 are arranged on two end sides of the first tubes and the second tubes 21A arranged in parallel, respectively. Refrigerant channels of the first tubes are opened in the upper and lower refrigerant tank parts 23 and 24, and a cold storage agent tank part 40 whose interior communicates with the cold storage accommodation path of each second tube 21A is provided between the upper refrigerant tank part 23 and the lower refrigerant tank part 24.

Description

  The present invention relates to an evaporator in which a refrigerant is allowed to flow in a tube and a cold storage agent is accommodated in the tube.

  A conventional evaporator of this type is disclosed in Patent Document 1. As shown in FIGS. 15 to 17, the evaporator 100 includes three heat exchange units 101, 110, and 120 that exchange heat between the refrigerant and air along the air flow. The three heat exchange units 101, 110, and 120 include a first heat exchange unit 101 upstream of the air flow, a second heat exchange unit 110 downstream of the first heat exchange unit 101, and a third heat exchange downstream of the air flow. Part 120.

  The 1st heat exchange part 101 and the 2nd heat exchange part 110 have a plurality of tubes 102 and 111 arranged in parallel, and a pair of tank parts 103 and 112 arranged at the both ends of tubes 102 and 111. . Refrigerant flow paths 102a and 111a are formed in the tubes 102 and 111, respectively. In each tank part 103,112, the refrigerant flow paths 102a, 111a of the tubes 102, 111 are opened.

  The third heat exchanging unit 120 includes a plurality of tubes 121 arranged in parallel and a pair of tank units 125 arranged on both ends of the tubes 121. The tube 121 is a double tube, and includes an inner tube 122 and an outer tube 123 disposed so as to cover the outer periphery of the inner tube 122. In each tube 121, the inner circumferential path is formed in the refrigerant flow path 122a, and the outer circumferential path is formed in the cool storage agent accommodation path 122b. A cool storage agent (not shown) is stored in the cool storage agent storage path 122b. As shown in detail in FIG. 18, each tank portion 125 has a refrigerant tank chamber 125a and a regenerator tank chamber 125b inside. A refrigerant flow path 122a of each tube 121 is opened in the refrigerant tank chamber 125a. In each cool storage agent tank chamber 125b, a cool storage agent accommodation path 122b of each tube 121 is opened.

  In the above configuration, the refrigerant flows through the refrigerant flow paths 102a, 112a, and 122a of the first to third heat exchange units 101, 110, and 120, and exchanges heat with air in the flow process. Thereby, air is cooled. A cold storage agent (not shown) exchanges heat with cooled air or a refrigerant, and stores cold heat. For example, when the evaporator 100 is mounted on a vehicle as a cooling source for an air conditioner for a vehicle, the engine is stopped by an idle stop or the like, and even when the refrigerant flow to the evaporator 100 is stopped, the cooled regenerator is air. The cool air can be blown out as much as possible into the passenger compartment. As a result, the cooling state of the passenger compartment can be maintained as much as possible while reducing power.

Special table 2009-525911

  However, in the third heat exchange unit 120 of the conventional example, the regenerator tank chamber 125b is provided in the tank unit 125 together with the refrigerant tank chamber 125a. The position of the tank part 125 is a position where there is little air flow, and is not suitable as an installation position of the regenerator tank chamber 125b. That is, since the refrigerant flows through the tubes 102 and 111, there is no problem even if the refrigerant tank chamber 125a has a small air flow. However, since the regenerator does not basically circulate in the tube 121, the regenerator tank chamber 125b is preferably located at a position with a large air flow.

  Then, this invention is made | formed in order to solve the above-mentioned subject, and it aims at providing the evaporator which has a freedom degree in the installation position of a cool storage agent tank part.

  In the present invention, a plurality of first tubes having a refrigerant flow path and a plurality of second tubes having a regenerator storage path are arranged in parallel, and a pair of refrigerant tanks are provided at both ends of the first tube and the second tube arranged in parallel. The refrigerant flow path of the first tube is opened in each refrigerant tank portion, and the refrigerant storage passage of the second tube is disposed between the pair of refrigerant tank portions. The evaporator is characterized in that a regenerator tank portion communicating with the inside is provided.

  The cold storage agent tank part has a through hole through which the first tube and the second tube pass, respectively, and the second tube has an opening of the cold storage agent accommodation path at a location passing through the inside of the cold storage agent tank part. Including those where the part is formed.

  The second tube includes two divided tube pieces that are butted against each other at a location that penetrates the regenerator tank portion, and includes the one in which the opening is formed by a gap between the butted surfaces.

  The 2nd tube contains what the notch part is formed in the location which penetrates the inside of the said cool storage agent tank part, and the said opening part is formed by the said notch part.

  The second tube includes a tube in which a hole is formed at a location penetrating the regenerator tank portion and the opening is formed by the hole.

  According to the present invention, the cool storage agent tank part is arranged at a position between the pair of refrigerant tank parts, and the arrangement position can be freely selected by adjusting the opening of the cool storage agent flow path of the second tube. Therefore, there is a degree of freedom in the installation position of the regenerator tank unit. And if the installation position of a cool storage agent tank part is installed in a position with many air flows, heat exchange of the cool storage agent in a cool storage agent tank part can be accelerated | stimulated.

1 is a schematic perspective view of an entire evaporator according to a first embodiment of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows a first embodiment of the present invention, in which (a) is a front view of an evaporator, (b) is a plan view of the evaporator, and (c) is a side view of the evaporator. 1 is a partial perspective view of an evaporator according to a first embodiment of the present invention. It is a longitudinal cross-sectional view of the 1st heat exchange part of the evaporator which shows 1st Embodiment of this invention. It is a perspective view for showing the 1st embodiment of the present invention and explaining the arrangement pattern of the tube of the 1st heat exchange part. FIG. 3 shows the first embodiment of the present invention, and is a longitudinal sectional view of the second heat exchange section (A-A line in FIG. 3). The 1st Embodiment of this invention is shown, (a) is a perspective view which shows the arrangement pattern of the tube of a 2nd heat exchange part, (b) is a front view of a 2nd tube. FIG. 7 shows the first embodiment of the present invention and is a cross-sectional view taken along line BB in FIG. 6. It is the schematic of the 2nd heat exchange part seen from the downstream of the air flow for showing the 1st embodiment of the present invention and explaining the refrigerant flow of the 2nd heat exchange part. It is the schematic of the 1st heat exchange part seen from the downstream of the air flow for showing the 1st embodiment of the present invention and explaining the refrigerant flow of the 1st heat exchange part. It is a front view of the 3rd heat exchange part concerning a 2nd embodiment. It is principal part sectional drawing (sectional drawing corresponded in FIG. 8) of the 2nd heat exchange part concerning 2nd Embodiment. It is a front view of the 3rd heat exchange part concerning a 3rd embodiment. It is principal part sectional drawing (sectional drawing corresponded in FIG. 8) of the 3rd heat exchange part concerning 3rd Embodiment. It is a whole perspective view of an evaporator, showing a conventional example. It is a schematic side view of an evaporator showing a conventional example. It is a cross-sectional view of an evaporator showing a conventional example. It is sectional drawing of the tank part of a 3rd heat exchange part which shows a prior art example.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
1 to 10 show a first embodiment of the present invention. 1 and 2, the evaporator 1 constitutes a refrigeration cycle together with a compressor, a condenser, an expansion valve and the like (not shown). The refrigeration cycle is applied to a vehicle air conditioner. The compressor is driven by the rotational force of the engine and stops when the engine stops. That is, at the time of idling stop, the compressor stops and the refrigerant flow to the evaporator 1 also stops. The evaporator 1 is arrange | positioned in the ventilation path of an air-conditioning unit (not shown). The air supplied to the air passage is blown out into the passenger compartment through the evaporator 1 and the like. Hereinafter, the configuration of the evaporator 1 will be described.

  As shown in FIGS. 1 to 7, the evaporator 1 includes a first heat exchange unit 10 and a second heat exchange unit 20 arranged along the air flow, and a second heat exchange from within the first heat exchange unit 10. And a communication part 50 for flowing the refrigerant into the part 20. The first heat exchange unit 10 is disposed on the upstream side of the air flow, and the second heat exchange unit 20 is disposed on the downstream side of the air flow.

  As shown in detail in FIGS. 4 and 5, the first heat exchange unit 10 includes a plurality of tubes 11 arranged at intervals, and a plurality of fins 12 arranged in an air passage between adjacent tubes 11. The upper refrigerant tank portion 13 and the lower refrigerant tank portion 14 disposed on both ends of the plurality of tubes 12, and the refrigerant outlet portion 15 fixed to one end of the upper refrigerant tank portion 13 are provided. The tube 11 has a plurality of refrigerant flow paths 11a extending in the longitudinal direction. The plurality of refrigerant flow paths 11a are partitioned from each other by a partition wall 11b.

  The upper refrigerant tank portion 13 is located at the upper position, and the lower refrigerant tank portion 14 is located at the lower position. The upper refrigerant tank portion 13 and the lower refrigerant tank portion 14 have a lower plate 16 and an upper plate 17 assembled to each other, and longitudinal ends (other than the refrigerant outlet portion 15) of the lower plate 16 and the upper plate 17 are It is closed by a closing plate 37. Thereby, upper refrigerant tank chambers 13a and 13b and lower refrigerant tank chambers 14a and 14b are formed in the upper refrigerant tank portion 13 and the lower refrigerant tank portion 14, respectively. The lower plate 16 has tube insertion holes 18 formed by burring at equal intervals. The end of the tube 11 is inserted into each tube insertion port 18. Accordingly, the upper refrigerant tank chambers 13a and 13b and the lower refrigerant tank chambers 14a and 14b communicate with the refrigerant flow paths 11a of the tubes 11 respectively. The upper refrigerant tank chambers 13a and 13b and the lower refrigerant tank chambers 14a and 14b are each partitioned by a partition wall 19 (see FIGS. 4 and 10). Thereby, the 1st heat exchange part 10 is formed so that a refrigerant | coolant may be flowed by 3 passes.

  As shown in detail in FIGS. 6 and 7, the second heat exchanging unit 20 includes a plurality of first tubes 21 and second tubes 21 </ b> A arranged at intervals, and adjacent first and second tubes 21 and 21 </ b> A. The plurality of fins 22 disposed in the air passage between them, the upper refrigerant refrigerant tank portion 23 and the lower refrigerant refrigerant tank portion 24 disposed on both ends of the plurality of tubes 21 and 21A, and the upper refrigerant refrigerant tank portion 23 And a refrigerant inlet portion 25 fixed to one end of the head.

  As shown to Fig.7 (a), the 1st tube 21 and the 2nd tube 21A are arrange | positioned alternately along the tube lamination direction. The first tube 21 is longer than the second tube 21A and is an integral part. As shown in FIGS. 7A and 7B, the second tube 21A is shorter than the first tube 21 and is formed of two divided tube pieces 21d and 21e. That is, the 2nd tube 21A consists of two division | segmentation tube pieces 21d and 21e mutually faced in the location which penetrates the inside of the cool storage agent tank part 40 mentioned below, and an opening part is formed of the clearance gap 45 of a mutual butting surface. Yes.

  The first tube 21 and the second tube 21A have therein a plurality of flow paths extending in the longitudinal direction. The plurality of flow paths are partitioned from each other by the partition wall 21c. All the flow paths of the first tube 21 are all formed as refrigerant flow paths 21a. All the flow paths of the second tube 21A are formed as cold storage agent accommodation paths 21b.

  As shown in FIG. 6, the upper refrigerant tank portion 23 is located at the upper position, and the lower refrigerant tank portion 24 is located at the lower position. The upper refrigerant tank portion 23 and the lower refrigerant tank portion 24 have a lower plate 26 and an upper plate 27 assembled to each other, and longitudinal ends (except for the refrigerant inlet portion 25) of the lower plate 26 and the upper plate 27 are It is closed by a closing plate 37. Upper refrigerant tank chambers 23a and 23b and lower refrigerant tank chambers 24a and 24b are formed in the upper refrigerant tank portion 23 and the lower refrigerant tank portion 24, respectively.

  Each lower plate 26 is formed with a burring tube insertion port 31 at a position corresponding to each first tube 21. The end portions of the first tubes 21 are inserted into the upper refrigerant tank chambers 23a and 23b and the lower refrigerant tank chambers 24a and 24b through the tube insertion ports 31, respectively. A refrigerant flow path 21a of the first tube 21 is opened in the upper refrigerant tank chambers 23a and 23b and the lower refrigerant tank chambers 24a and 24b.

  Each lower plate 26 has a recess 32 at a position corresponding to each second tube 21A. The end of the second tube 21 </ b> A is fitted in each recess 32, and the end surface of the second tube 21 </ b> A is in contact with the bottom surface of the recess 32. This contact portion is brazed. The open end of the regenerator storage path 21b of the second tube 21A is sealed by brazing.

  The regenerator tank unit 40 is disposed between the upper refrigerant tank unit 23 and the lower refrigerant tank unit 24. In the cool storage agent tank section 40, a cool storage agent tank chamber 40a is formed. Both ends in the longitudinal direction of the regenerator tank chamber 40a are closed by the closing plates 42. The cool storage agent tank section 40 has through holes 41 through which the first tube 21 and the second tube 21 </ b> A pass, respectively, at two locations. The 1st tube 21 and the 2nd tube 21A have penetrated. Each through hole 41 is formed by burring, and a burring protruding wall 41 a is formed around each through hole 41. Each burring protruding wall 41 a is formed toward the inside of the cool storage agent tank portion 40. That is, the two burring protruding walls 41a are in different directions.

  By providing a gap between the upper surface of the cool storage agent tank section 40 and the fins 22, it is possible to improve drainage. Moreover, the cool storage agent tank part 40 can also serve as positioning of the fin 22 itself.

  The inner surface of the through hole 41 and the outer surfaces of the first tube 21 and the second tube 21A are sealed by brazing.

  As for the 2nd tube 21A, as shown in FIG. 8, the location which penetrates the inside of the cool storage agent tank part 40 is a butt | matching position of two division | segmentation tube pieces 21d and 21e, and the cool storage agent accommodation path 21b by the clearance gap 45 which is an opening part. Communicates with the regenerator tank chamber 40a. A cool storage agent is stored in the cool storage agent tank chamber 40a and the cool storage agent storage path 21b of the tube 21A. Since the cool storage agent tank chamber 40a and the cool storage agent accommodation path 21b of the tube 21A communicate with each other to form an integrated space, the cool storage agent can be filled in a single filling operation. The cold storage agent is, for example, paraffin.

  As shown in detail in FIG. 9, the upper refrigerant tank chambers 23 a and 23 b are partitioned by one partition wall 33. The one partition wall 33 partitions the upper refrigerant tank chambers 23a and 23b at a position about one third of the longitudinal direction. The lower refrigerant tank chambers 24 a and 24 b are partitioned by a single partition wall 35. The 2nd heat exchange part 20 is formed so that a refrigerant | coolant may be flowed by 3 passes.

  In the above configuration, the refrigerant that has flowed into the second heat exchange unit 20 from the refrigerant inlet 25 flows in the second heat exchange unit 20 with a refrigerant flow as shown in FIG. 9, passes through the communication unit 50, and the first heat exchange unit. 10 flows in. The refrigerant that has flowed into the first heat exchange unit 10 flows through the first heat exchange unit 10 in a refrigerant flow as shown in FIG. The refrigerant exchanges heat with air in the process of mainly flowing through the tubes 11 and 21 of the first heat exchange unit 10 and the second heat exchange unit 20. Thereby, the air which passes the evaporator 1 is cooled. Moreover, the cool storage agent (not shown) in each short tube 21A heat-exchanges with the cooled air and a refrigerant | coolant, and stores cold heat. For example, when the engine is stopped at an idle stop and the refrigerant flow to the evaporator 1 is thereby stopped, the cooled regenerator can cool the air and blow out cold air as much as possible into the passenger compartment. As a result, the cooling state of the passenger compartment can be maintained as much as possible while reducing power.

  In the second heat exchange unit 20 of the evaporator 1 described above, the regenerator tank unit 40 is disposed at a position between the upper refrigerant tank unit 23 and the lower refrigerant tank unit 24, and this arrangement position is the second tube 21A. It can be freely selected by adjusting the opening (the position of the gap 45) of the cold storage agent passage 21b. That is, there is a degree of freedom in the installation position of the regenerator tank unit 40. And if the installation position of the cool storage agent tank part 40 is installed in a position with many air flows, heat exchange of the cool storage agent in the cool storage agent tank part 40 can be accelerated | stimulated. Thereby, the amount of effective cool storage agents in the same volume increases, the storage capacity of the cool storage agent can be reduced, and the performance of the evaporator can be improved and the size can be reduced.

  The upper refrigerant tank portion 23 and the lower refrigerant tank portion 24 of the second heat exchange unit 20 do not need to form a regenerator tank chamber therein, so that the design of the first heat exchange unit 10 is slightly changed. You can respond in the same way just by adding. Thereby, cost reduction can be aimed at.

(Second Embodiment)
11 and 12 show a second embodiment of the present invention. When comparing the second embodiment and the first embodiment, only the configurations of the second tube 21B and the regenerator tank portion 40A are different. The second tube 21B according to the second embodiment is formed from a single member. In the second tube 21B, a notch 46 is formed at a location penetrating the cool storage agent tank 40A. An opening is formed by the notch 46. The notch 46 opens all the cool storage agent accommodation paths 21b. In the regenerator tank portion 40A, two burring protruding walls 41a protrude in the same upward direction. The second tube 21B and the like are inserted through the through-hole 41 of the cool storage agent tank 40A from below and penetrated. When penetrating the second tube 21B and the like into the regenerator tank portion 40A, the second tube 21B and the tip of the burring protruding wall 41a do not interfere with each other, so that the insertability is good. Regarding the processing of the regenerator tank part 40 itself, it is only necessary to stand the burring projecting wall 41a from one direction.

  The burring protrusion wall 41a protrudes from the upper surface of the cool storage agent tank portion 40, and a gap is formed between the upper surface of the cool storage agent tank portion 40 and the fins 22 by the burring protrusion wall 41a, so that drainage can be improved. Moreover, the cool storage agent tank part 40 burring protrusion wall 41a can also serve as positioning of fin 22 itself.

  Since other configurations are the same as those of the first embodiment, description thereof is omitted. The same components in the drawings are given the same reference numerals for clarification.

  Even in the second embodiment, the installation position of the regenerator tank unit 40 can be freely set for the same reason as in the first embodiment. Since the second tube 21B is an integral part, it is easier to assemble than the first embodiment.

(Third embodiment)
13 and 14 show a third embodiment of the present invention. When the third embodiment is compared with the first embodiment, only the configurations of the second tube 21C and the regenerator tank portion 40A are different. The second tube 21C according to the third embodiment is formed of a single member. A hole 47 is formed in the second tube 21 </ b> C at a location penetrating the cool storage agent tank 40. An opening is formed by the hole 47. The hole 47 opens all the cool storage agent accommodation paths 21b.

  Since the structure of the regenerator tank portion 40A is the same as that of the second embodiment, the same reference numerals are given to the drawings and the description thereof is omitted.

  Since other configurations are the same as those of the first embodiment, description thereof is omitted. The same components in the drawings are given the same reference numerals for clarification.

  Also in the third embodiment, the installation position of the regenerator tank unit 40 can be freely set for the same reason as in the first embodiment. Since the second tube 21C is an integral part, it is easier to assemble than the first embodiment.

  In the third embodiment, for the same reason as in the second embodiment, there is an advantage that the insertability of the second tube 21C and the like into the regenerator tank portion 40A is good.

(Modification)
In each said embodiment, the through-hole 41 is formed in two places of the cool storage agent tank part 40. As shown in FIG. Although the burring protrusion wall 41a surrounding the periphery of each through hole 41 protrudes toward the inside of the cold storage agent tank portion 40, it may protrude toward the outside.

  In each said embodiment, although the evaporator 1 comprised the 1st heat exchange part 10 and the 2nd heat exchange part 20, you may comprise from 3 or more heat exchange parts. Further, the present invention can be applied even if it is constituted by one heat exchange part.

DESCRIPTION OF SYMBOLS 1 Evaporator 21 1st tube 21A-21C 2nd tube 21a Refrigerant flow path 21b Cold storage agent accommodation path 21d, 21e Division | segmentation tube piece 23 Upper refrigerant tank part 24 Lower refrigerant tank part 40 Cold storage agent tank part

Claims (5)

A plurality of first tubes (21A) to (21C) having a first tube (21) having a refrigerant flow path (21a) and second tubes (21A) to (21C) having a regenerator storage path (21b) are arranged in parallel, and the first tubes ( 21) and a pair of refrigerant tanks (23), (24) are arranged at both ends of the second tubes (21A) to (21C), and the refrigerant tanks (23), (24) have the above-mentioned The refrigerant flow path (21a) of the first tube (21) is opened,
Between the pair of refrigerant tank portions (23), (24), a cold storage agent tank portion (40) whose inside communicates with the cold storage agent storage passage (21b) of the second tubes (21A) to (21C). An evaporator (1) characterized in that is provided. An evaporator (1) according to claim 1, comprising:
The cold storage agent tank section (40) has a through hole (41) through which the first tube (21) and the second tubes (21A) to (21C) pass, respectively, and the second tube (21A) to (21C) is characterized in that openings (45), (46), (47) of the regenerator storage passage (21b) are formed at locations passing through the regenerator tank part (40). The evaporator (1). An evaporator (1) according to claim 2, comprising:
The second tube (21A) is composed of two divided tube pieces (21d) and (21e) which are butted against each other at a location penetrating the regenerator tank portion (40), and a gap (45) between the butted surfaces of each other. ), Wherein the opening is formed. An evaporator (1) according to claim 2, comprising:
In the second tube (21B), a notch (46) is formed at a location penetrating the regenerator tank portion (40), and the opening is formed by the notch (46). An evaporator (1) characterized in that. An evaporator (1) according to claim 2, comprising:
In the second tube (21C), a hole (47) is formed at a location penetrating the inside of the regenerator tank portion (40), and the opening is formed by the hole (47). Evaporator (1).

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