JP2014145560A - Liquid storage device and liquid storage device integrated heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the durability against an external pressure and an internal pressure in a liquid storage device formed by laminating and joining plate-like members.SOLUTION: A gas-liquid separation space 12 which separates a refrigerant into a gas phase refrigerant and a liquid phase refrigerant and stores the liquid phase refrigerant is formed between plate-like members 11. Joining means which joins the plate-like members 11 to each other and inhibits deformation of the plate-like members 11 is provided in the gas-liquid separation space 12. For example, the joining means is an intermediate member which is disposed between the plate-like members 11 and is joined to the plate-like members 11.

Description

  The present invention relates to a liquid reservoir that separates the gas-liquid refrigerant and stores the separated liquid-phase refrigerant, and a liquid reservoir-integrated heat exchanger that includes a liquid reservoir and a heat exchanger.

  Conventionally, there are a receiver and an accumulator as a liquid storage device that separates the gas-liquid of the refrigerant and stores the separated liquid-phase refrigerant.

  The receiver is disposed on the high-pressure side of the refrigeration cycle and has a function of separating the refrigerant condensed by the condenser of the refrigeration cycle into a gas-phase refrigerant and a liquid-phase refrigerant and causing the separated liquid-phase refrigerant to flow out. Yes.

  The accumulator is disposed on the low pressure side of the refrigeration cycle, and has a function of separating the refrigerant evaporated by the evaporator of the refrigeration cycle into a gas phase refrigerant and a liquid phase refrigerant, and causing the separated gas phase refrigerant to flow out. Yes.

  The receiver and accumulator also have a function of storing the liquid-phase refrigerant according to the increase or decrease of the necessary refrigerant amount according to the load fluctuation of the refrigeration cycle. Therefore, the receiver and accumulator require a relatively large volume.

  In the receiver and the accumulator, the pressure of the refrigerant acts as an internal pressure. Therefore, conventional general receivers and accumulators are formed in a substantially cylindrical shape with a relatively large thickness in order to ensure the desired pressure resistance.

  On the other hand, Patent Document 1 describes a receiver configured by laminating plate-like members. Similarly, Patent Document 2 describes an accumulator configured by laminating plate-like members.

US Patent Application Publication No. 2012/0222846 US Patent Application Publication No. 2012/0216562

  However, the receivers and accumulators of Patent Documents 1 and 2 are considered to have insufficient durability against external pressure and internal pressure because the plate-like members are merely joined at the outer peripheral edge.

  That is, in the receivers and accumulators of Patent Documents 1 and 2, since the space between the plate members is entirely a space, the plate members may be dented by external pressure. The receivers and accumulators of Patent Documents 1 and 2 have a small bonding area between the plate-like members, and may be easily damaged by internal pressure.

  In view of the above points, an object of the present invention is to improve durability against external pressure and internal pressure in a reservoir configured by laminating and joining plate-like members to each other.

In order to achieve the above object, in the invention described in claim 1,
A plate-shaped member (11) is a liquid reservoir configured by stacking and joining each other,
Between the plate-like members (11), gas-liquid separation spaces (12, 32) for separating the refrigerant into a gas-phase refrigerant and a liquid-phase refrigerant and storing the liquid-phase refrigerant are formed,
The gas-liquid separation space (12, 32) is provided with joining means (17, 111) for joining the plate-like members (11) to suppress deformation of the plate-like member (11). To do.

  According to this, since the plate-like members (11) are joined to each other by the joining means (17, 111) in the gas-liquid separation space (12, 32), the plate-like members are joined only at the outer peripheral edge. Compared with the case, durability against external pressure and internal pressure can be improved.

  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 perspective view which shows the receiver in 1st Embodiment. It is a perspective view which shows typically the receiver and condenser in 1st Embodiment. It is a perspective sectional view showing an internal structure of a receiver and a condenser in a 1st embodiment. It is a perspective sectional view showing the internal structure of the condenser in a 1st embodiment. It is a perspective view which shows typically the lower part of the receiver in 1st Embodiment. It is a perspective sectional view showing the internal structure of the condenser in the 1st modification of a 1st embodiment. It is a perspective sectional view showing the internal structure of the condenser in the 2nd modification of a 1st embodiment. It is a perspective sectional view showing the internal structure of the condenser in the 3rd modification of a 1st embodiment. It is a perspective view which shows the accumulator in 2nd Embodiment. It is a perspective view which shows typically the accumulator in 2nd Embodiment. It is a perspective view which shows typically the accumulator in 3rd Embodiment. It is a perspective view which shows typically the upper tank space of the accumulator in 4th Embodiment. It is a perspective view which shows typically the receiver and condenser in 5th Embodiment. It is a perspective view which shows typically the receiver in 6th Embodiment, a condenser, and an evaporator. It is a perspective view which shows the restraint member in 7th Embodiment.

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

(First embodiment)
1st Embodiment is described based on FIGS. FIG. 1 is a perspective view of a receiver 1 that is a liquid reservoir. FIG. 2 is a perspective view schematically showing the receiver 1 and the condenser 2 constituting the liquid reservoir integrated heat exchanger. In FIG. 1 and FIG. 2, the up and down arrows indicate the up and down direction (gravity direction) in the vehicle mounted state.

  The receiver 1 and the condenser 2 constitute a refrigeration cycle of the vehicle air conditioner. The receiver 1 is a gas-liquid separator for a high-pressure side refrigerant that separates the gas-liquid of the refrigerant that has flowed into the receiver 1 and stores excess refrigerant in the refrigeration cycle. The condenser 2 is a heat exchanger that condenses the high-pressure side refrigerant by exchanging heat between the high-pressure side refrigerant of the refrigeration cycle and cooling water (heat exchange fluid).

  The high-pressure side refrigerant (gas-liquid two-phase refrigerant) condensed by the condenser 2 flows into the receiver 1. The receiver 1 causes the separated liquid phase refrigerant to flow out to the expansion valve side of the refrigeration cycle.

  The receiver 1 and the condenser 2 are integrally formed by laminating and joining a large number of plate-like members 11. Hereinafter, the stacking direction of the plate-like members 11 is referred to as a plate stacking direction.

  The plate-like member 11 is an elongated, substantially rectangular plate material. As a specific material, for example, a double-sided clad material in which a brazing material is clad on both surfaces of an aluminum core material is used.

  On the outer peripheral edge of the substantially rectangular plate-like member 11, an overhanging portion 11 a that protrudes in the plate stacking direction (a direction orthogonal to the plate surface of the plate-like member 11) is formed. A large number of plate-like members 11 are joined to each other by brazing, with the overhanging portions 11a being laminated together.

  The arrangement direction of the large number of plate-like members 11 (the direction in which the protruding tip of the protruding portion 11a faces) is the same. In the example of FIG. 1, a large number of plate-like members 11 are arranged such that the protruding tips of the overhang portions 11 a face the left side of FIG. 1.

  The receiver 1 and the condenser 2 are mounted on the vehicle such that the longitudinal direction of the plate-like member 11 coincides with the vehicle vertical direction.

  Between the plate-like members 11 constituting the receiver 1, a gas-liquid separation space 12 for separating the refrigerant into a gas phase refrigerant and a liquid phase refrigerant and storing the liquid phase refrigerant is formed. A large number of gas-liquid separation spaces 12 are stacked and arranged in parallel in the plate stacking direction. The gas-liquid separation spaces 12 are constituted by communication holes 11 b formed in the plate-like member 11. The communication holes 11 b are formed at the four corners of the plate-like member 11.

  Two upper tank spaces 13 are configured by the two communication holes 11 b formed in the upper part of the plate-like member 11. Two lower tank spaces 14 are constituted by two communication holes 11 b formed in the lower part of the plate-like member 11.

  A refrigerant inlet 15 shown in FIG. 2 is formed in a plate-like member 11A (an inlet-side plate-like member) located at one end (left end in FIG. 1) in the tube stacking direction in the receiver 1. The refrigerant inlet 15 is disposed above the lower tank space 14 and below the upper tank space 13.

  As shown in FIG. 1, a liquid-phase refrigerant outlet 16 is formed in a plate-like member 11 </ b> B (exit-side plate-like member) located at the other end (right end in FIG. 1) in the tube stacking direction in the receiver 1. The liquid refrigerant outlet 16 is formed in a portion of the plate member 11B that forms the lower tank space 14. As shown in FIG. 2, the refrigerant inlet 15 is disposed above the liquid phase refrigerant outlet 16 and below the upper tank space 13.

  The condenser 2 includes a heat exchanging portion 21, an upper refrigerant tank space 22, a lower refrigerant tank space 23, an upper cooling water tank space 24, and a lower cooling water tank space 25. The heat exchange unit 21 includes a plurality of refrigerant channels and a plurality of cooling water channels.

  The plurality of refrigerant flow paths and the plurality of cooling water flow paths are stacked and arranged (parallel arrangement) in the plate stacking direction. The longitudinal direction of the coolant channel and the coolant channel matches the vehicle vertical direction (gravity direction). Therefore, in the heat exchange unit 21, the refrigerant and the cooling water flow in the direction of gravity.

  The upper refrigerant tank space 22 and the upper cooling water tank space 24 are arranged on the upper end side of the heat exchange unit 21. The lower refrigerant tank space 23 and the lower cooling water tank space 25 are arranged on the lower end side of the heat exchange unit 21.

  The upper refrigerant tank space 22 and the lower refrigerant tank space 23 distribute and collect the refrigerant with respect to a plurality of refrigerant flow paths. The upper cooling water tank space 24 and the lower cooling water tank space 25 perform distribution and aggregation of the cooling water to the plurality of cooling water flow paths.

  Although not shown, the upper refrigerant tank space 22, the lower refrigerant tank space 23, the upper cooling water tank space 24 and the lower cooling water tank space 25 are composed of two upper tank spaces 13 of the receiver 1. Similarly to the two lower tank spaces 14, the plate-like member 11 is constituted by communication holes 11 a formed at the four corners.

  The upper refrigerant tank space 22 and the upper cooling water tank space 24 overlap with the two upper tank spaces 13 of the receiver 1 when viewed from the plate stacking direction. The lower refrigerant tank space 23 and the lower cooling water tank space 25 overlap the two lower tank spaces 14 of the receiver 1 when viewed from the plate stacking direction.

The refrigerant outlet of the condenser 2 overlaps with the refrigerant inlet 15 of the receiver 1. Therefore, the refrigerant outlet of the condenser 2 and the refrigerant inlet 15 of the receiver 1 are arranged above the lower refrigerant tank space 23 and below the upper refrigerant tank space 22.

The broken-line arrows in FIG. 2 are arranged adjacent to each other on the most downstream side of the refrigerant flow of the heat exchange unit 21 (the side closest to the receiver 1) among the plurality of refrigerant channels constituting the heat exchange unit 21 of the condenser 2. The refrigerant flow in the refrigerant channel group 21a (hereinafter referred to as the final path) is shown. The final path 21 a is configured by at least a part of the plurality of refrigerant flow paths constituting the heat exchange unit 21 of the condenser 2.

  In the final path 21a, the refrigerant flows from the top to the bottom. In other words, the refrigerant flow is downward in the final path 21a.

  As shown in FIG. 3, inner fins 17 are arranged between the plate-like members 11 constituting the receiver 1 and the condenser 2. The inner fin 17 constitutes an intermediate member interposed between the plate-like members 11. The inner fin 17 is formed in a corrugated plate shape, and is joined to both plate-like members 11.

  Therefore, the inner fin 17 constitutes a joining means for joining the plate-like members 11 in the gas-liquid separation space 12 of the receiver 1. The inner fin 17 constitutes a joining means for joining the plate-like members 11 in the refrigerant flow path of the condenser 2.

  FIG. 4 shows the plate-like member 11 and the inner fin 17 that form the refrigerant flow path in the final path 21 a of the condenser 2. In the final path 21 a of the condenser 2, a large number of small holes 11 c and 17 a are formed in the plate-like member 26 and the inner fin 17.

  By forming the small holes 11 c and 17 a in the inner fin 17 and the plate-like member 11, the refrigerant flowing through the refrigerant flow path in the final path 21 a is allowed to flow above the lower refrigerant tank space 23 of the condenser 2 ( The refrigerant can be collected at the upstream side of the refrigerant flow and flow out toward the refrigerant inlet 15 of the receiver 1.

  As shown in FIG. 5, an insertion hole 18 for inserting a desiccant or a filter into the lower tank space 14 is formed in the plate-like member 11 </ b> B located on the outermost side in the tube stacking direction (the rightmost side in FIG. 5) in the receiver 1. Is formed.

  The insertion hole 18 is closed by the lid member 19 after the plate-like members 11 are brazed. The lid member 19 is detachable from the plate-like member 11B.

  By inserting the desiccant into the lower tank space 14, moisture in the liquid phase refrigerant can be removed. By inserting the filter into the lower tank space 14, dust in the liquid phase refrigerant can be removed.

  According to the above configuration, the high-pressure refrigerant (gas-liquid two-phase refrigerant) that has flowed through the final path 21a of the condenser 2 passes through the refrigerant inlet 15 of the receiver 1 as shown in the broken line arrows and the solid line arrows in FIG. 12 is separated into the gas-liquid separation space 12, and the separated liquid-phase refrigerant flows out from the liquid-phase refrigerant outlet 16. The excess of the separated liquid phase refrigerant is stored in the gas-liquid separation space 12.

  According to the present embodiment, since the plate-like members 11 are joined to each other by the inner fins 17 in the gas-liquid separation space 12, the plate-like members are joined only at the outer peripheral edge as in the above-described prior art. In comparison, the bonding area between the plate-like members 11 can be increased, and as a result, durability against external pressure and internal pressure can be improved.

  That is, the pressure resistance can be ensured in the receiver 1 in which the internal pressure is high. In addition, in the manufacturing process of the receiver 1 (lamination of the plate-like member 11 → additional tightening → brazing), the plate-like member 11 can be prevented from being dented by external pressure.

  FIG. 6 shows a modification of the inner fin 17. The inner fin 17 in FIG. 6 is a plate-like member in which a cut and raised portion 171 that is partially cut and raised is formed. A large number of cut-and-raised portions 171 are formed in the vertical direction (longitudinal direction of the plate-like member 11). The cut and raised portions 171 adjacent in the vertical direction are offset from each other.

  7 and 8 show modifications of the plate member 11. The plate-like member 11 is stamped and formed with a punching portion 111 that contacts the adjacent plate-like member 11. The launching part 111 is joined to the adjacent plate-like members 11. Therefore, the launching part 111 constitutes a joining means for joining the plate-like members 11 in the gas-liquid separation space 12 of the receiver 1.

  In the example of FIG. 7, the launching portion 111 extends in parallel with the longitudinal direction of the plate-like member 11, and the launching portions 111 overlap each other. In the example of FIG. 8, the launching portion 111 extends in a direction inclined by 45 degrees with respect to the longitudinal direction of the plate-like member 11, and the launching portions 111 intersect with each other.

  According to the modified examples of FIGS. 7 and 8, since the plate-like members 11 can be joined without using another member, the configuration can be simplified.

  According to the present embodiment, since the refrigerant inlet 15 is arranged on the upper side in the gravity direction than the liquid-phase refrigerant outlet 16, the gas-liquid is compared with the case where the refrigerant inlet 15 is arranged on the lower side. Separation can be improved.

  Furthermore, since the refrigerant inlet 15 is disposed below the upper refrigerant tank space 22 in the gravity direction, the refrigerant inlet 15 is compared with the case where the refrigerant inlet 15 is disposed further upward than that. It is possible to prevent the liquid level of the liquid-phase refrigerant stored in the gas-liquid separation space 12 from being disturbed by the flow of the refrigerant from.

  According to this embodiment, in the final path 21 a of the condenser 2, the refrigerant flows from the upper side in the gravitational direction toward the lower side in the gravitational direction. The final path 21a can be effectively used as a heat exchange unit.

  According to the present embodiment, the plate-like member 11 that forms the final path 21a is formed with the communication holes 11c that allow the refrigerant paths of the final path 21a to communicate with each other. It is possible to collect the refrigerant flowing through the communication hole 11c and to flow out to the reservoir 1 side.

  For this reason, the refrigerant flowing through each refrigerant flow path of the final path 21a can flow out to the liquid reservoir 1 side without being collected in the lower refrigerant tank space 23, so that the refrigerant inlet 15 is provided in the lower refrigerant tank space. Even if it is arranged on the upper side in the gravitational direction with respect to 23, the refrigerant flowing through each refrigerant flow path in the final path 21a can be satisfactorily discharged to the reservoir 1 side.

  In the present embodiment, the refrigerant inlet 15 is disposed below the lower refrigerant tank space 22 in the gravity direction. However, the refrigerant inlet 15 is located on the lower refrigerant tank space when viewed from the plate stacking direction. 23 may be arranged so as to overlap. In this case, the refrigerant collected in the lower refrigerant tank space 23 in the condenser 2 may be allowed to flow into the liquid reservoir 1, so that the configuration can be simplified.

(Second Embodiment)
A second embodiment will be described with reference to FIGS. FIG. 9 is a perspective view of the accumulator 3 that is a liquid reservoir. FIG. 10 is a perspective view schematically showing the accumulator 3. 9 and 10, the up and down arrows indicate the up and down direction (gravity direction) in the vehicle mounted state.

  The accumulator 3 constitutes the refrigeration cycle of the vehicle air conditioner. The accumulator 3 is a gas-liquid separator for a low-pressure side refrigerant that separates the gas-liquid refrigerant flowing into the accumulator 3 and stores excess refrigerant in the refrigeration cycle.

  More specifically, the accumulator 3 separates the low-pressure side refrigerant (gas-liquid two-phase refrigerant) evaporated by the evaporator of the refrigeration cycle into a gas phase refrigerant and a liquid phase refrigerant, and converts the gas phase refrigerant into the refrigeration cycle. It flows out to the compressor side and stores liquid phase refrigerant. The accumulator 3 functions to prevent liquid compression of the compressor by preventing the liquid phase refrigerant from being sucked into the compressor.

  The accumulator 3 is formed by laminating and joining a large number of plate-like members 11 in the same manner as the receiver 1 in the first embodiment. Hereinafter, the stacking direction of the plate-like members 11 is referred to as a plate stacking direction.

  One part of the accumulator 3 in the plate stacking direction (left side part in FIG. 9) constitutes an accumulator main body 30, and the other part of the accumulator 3 in the plate stacking direction (right side part in FIG. 9). Constitutes an oil return portion 31.

  The accumulator main body 30 separates the gas-liquid two-phase refrigerant into a gas-phase refrigerant and a liquid-phase refrigerant, causes the gas-phase refrigerant to flow out to the oil return unit 31, and stores the liquid-phase refrigerant. The oil return unit 31 has a function of joining the oil in the liquid-phase refrigerant stored in the accumulator main body 30 with the gas-phase refrigerant flowing out of the accumulator main body 30 and returning it to the compressor.

  A gas-liquid separation space 32 is formed between the plate-like members 11 constituting the accumulator main body 30 to separate the refrigerant into a gas phase refrigerant and a liquid phase refrigerant and store the liquid phase refrigerant. A large number of gas-liquid separation spaces 32 are stacked and arranged in parallel in the stacking direction of the plate-like members 11. The gas-liquid separation spaces 32 are configured by communication holes 11 b formed in the plate-like member 11. The communication holes 11 b are formed at the four corners of the plate-like member 11.

  Two upper tank spaces 33 are configured by the two communication holes 11 b formed in the upper part of the plate-like member 11. Two lower tank spaces 34 are constituted by two communication holes 11 b formed in the lower part of the plate-like member 11.

  In the accumulator main body 30, a refrigerant inlet 35 is formed in the plate member 11C (inlet side plate member) located at one end (left end in FIG. 9) in the tube stacking direction. The refrigerant inlet 35 overlaps with one upper tank space 33 (the upper tank space 33 on the front side in FIG. 9) when viewed from the plate stacking direction.

  As shown in FIG. 9, a gas-phase refrigerant outlet 36 and an oil outlet 37 are formed in the plate-like member 11D (exit-side plate-like member) located at the other end (right end in FIG. 9) in the tube stacking direction in the accumulator main body 30. Has been.

  The gas-phase refrigerant outlet 36 is formed in a portion of the plate member 11D that forms the other upper tank space 33. The oil outlet 36 overlaps with the other upper tank space 33 (the upper tank space 33 on the back side in FIG. 9) when viewed from the plate stacking direction.

  The gas-phase refrigerant outlet 36 is formed in an orifice shape that reduces the flow path area. Therefore, the gas phase refrigerant outlet 36 constitutes a pressure loss applying means for applying a pressure loss to the gas phase refrigerant flowing out from the accumulator main body 30.

  As shown in FIG. 10, a barrier 38 is provided between the refrigerant inlet 35 and the gas-phase refrigerant outlet 36 in the gas-liquid separation space 32. The barrier 38 serves to prevent the refrigerant from flowing linearly from the refrigerant inlet 35 to the gas-phase refrigerant outlet 36 in the gas-liquid separation space 32.

  As shown in FIG. 9, the oil return part 31 is comprised by the two plate-shaped members 11E and 11F. A gas-phase refrigerant inlet 41 and an oil inlet 42 are formed on the plate-like member 11E (inlet-side plate-like member) located on the accumulator main body 30 side (left side in FIG. 9) of the two plate-like members 11E and 11F. Has been.

  The gas phase refrigerant inlet 41 overlaps with the gas phase refrigerant outlet 36 of the accumulator main body 30. In other words, the gas-phase refrigerant inlet 41 is arranged at a position that overlaps with one upper tank space 33 (the upper tank space 33 on the front side in FIG. 9) of the accumulator main body 30 when viewed from the plate stacking direction. ing.

  The oil inlet 42 overlaps the oil outlet 37 of the accumulator main body 30. In other words, the oil inlet 42 is disposed at a position overlapping the lower tank space 34 of the accumulator main body 30 when viewed from the plate stacking direction.

  A refrigerant oil outlet 43 is formed on the plate-like member 11F (exit-side plate-like member) located on the opposite side (the right side in FIG. 9) of the two plate-like members 11E and 11F to the accumulator main body 30. .

  The refrigerant oil outlet 43 is disposed at a position overlapping with the other upper tank space 33 (the upper tank space 33 on the back side of FIG. 9) of the accumulator main body 30 when viewed from the plate stacking direction. The refrigerant oil outlet 43 is connected to the suction side of the compressor.

  A gas phase refrigerant flow path 44 extending from the gas phase refrigerant inlet 41 to the refrigerant oil outlet 43 is formed between the two plate-like members 11E and 11F constituting the oil return portion 31. The gas-phase refrigerant channel 44 is formed so as to extend downward from the gas-phase refrigerant inlet 41, further U-turn, and extend upward to reach the refrigerant oil outlet 43.

  Specifically, as shown in FIG. 9, the partition plate 45 is disposed in the internal space formed between the two plate-like members 11E and 11F constituting the oil return portion 31, and the plate-like member 11F. The gas phase refrigerant flow path 44 is formed by forming the punching portion 46 at the lower portion of the gas phase.

  The partition plate 45 partitions an internal space formed between the two plate-like members 11E and 11F into two spaces in the horizontal direction (short direction of the plate-like members 11E and 11F). The launching portion 46 communicates the two spaces partitioned by the partition plate 45.

  Although not shown, like the receiver 1 of the first embodiment, the plate-like member 11C located at one end in the tube stacking direction (left end in FIG. 9) in the accumulator main body 30 has a lower tank space 34. An insertion hole for inserting a desiccant or a filter is formed in the. The insertion hole is closed by the lid member after the plate-like members 11 are brazed. The lid member is detachable from the plate-like member 11C.

  Although not shown, inner fins are arranged between the plate-like members 11 constituting the accumulator 3 as in the receiver 1 of the first embodiment. The inner fin constitutes a joining means for joining the plate-like members 11 together.

  Similar to the receiver 1 of the first embodiment, the plate-like member 11 constituting the accumulator 3 is formed with a punched portion that is brought into contact with and joined to the adjacent plate-like member 11 so that the plate-like members are connected to each other. You may comprise the joining means to join.

  As indicated by solid line arrows in FIG. 10, the refrigerant (gas-liquid two-phase refrigerant) flowing into the accumulator main body 30 from the refrigerant inlet 35 is gas-liquid separated in the gas-liquid separation space 32, and the separated gas-phase refrigerant is It flows out from the phase refrigerant outlet 36. The separated liquid phase refrigerant is stored in the gas-liquid separation space 34.

  The gas phase refrigerant that has flowed out of the accumulator main body 30 flows into the oil return portion 31 from the gas phase refrigerant inlet 41, flows through the gas phase refrigerant flow path 44, and flows out of the refrigerant oil outlet 43.

  At this time, the gas-phase refrigerant flowing in the gas-phase refrigerant channel 44 is decompressed when passing through the orifice-like gas-phase refrigerant outlet 36. Therefore, the pressure of the gas-phase refrigerant flowing through the gas-phase refrigerant channel 44 is lower than the pressure of the liquid-phase refrigerant stored in the accumulator main body 30.

  As a result, the oil in the liquid refrigerant stored in the accumulator body 30 flows into the gas-phase refrigerant flow path 44 through the oil outlet 37 of the accumulator body 30 and the oil inlet 42 of the oil return part 31. Therefore, the oil outlet 37 of the accumulator main body 30 constitutes a merging portion where the oil merges with the gas phase refrigerant flowing in the gas phase refrigerant flow path 44.

  According to the present embodiment, the gas-liquid separation space 32 is provided with the barrier 38 that prevents the refrigerant from flowing linearly from the refrigerant inlet 35 to the gas-phase refrigerant outlet 36. The refrigerant that has flowed into 32 collides with the barrier 38. As a result, it is possible to reliably perform gas-liquid separation of the refrigerant.

  According to the present embodiment, since the orifice-shaped gas-phase refrigerant outlet 36 is disposed between the gas-liquid separation space 32 and the oil inlet 42, the pressure of the gas-phase refrigerant flowing through the gas-phase refrigerant channel 44 is changed to the oil inlet. The oil pressure at 42 is lower. Therefore, oil return can be promoted by utilizing the differential pressure between the gas phase refrigerant flowing in the gas phase refrigerant flow path 44 and the oil at the oil inlet 42.

  In the present embodiment, the gas-phase refrigerant outlet 36 is formed in an orifice shape, but a portion upstream of the oil inlet 42 in the gas-phase refrigerant channel 44 may be formed in an orifice shape.

  According to the present embodiment, the oil return portion 31 is configured by laminating and joining the plate-like members 11E and 11F to each other, and the air return portion 31 is interposed between the plate-like members 11E and 11F constituting the oil return portion 31. Since the phase refrigerant flow path 44 is formed, the oil return portion 31 can be integrated with the accumulator main body portion 30. For this reason, while being excellent in the productivity of the accumulator 3 containing the oil return part 31, the physique of the accumulator 3 containing the oil return part 31 can be compactized.

  According to the present embodiment, the oil inlet 42 of the oil return portion 31 is disposed on the lower side in the gravity direction than the gas phase refrigerant inlet 35, and the gas phase refrigerant flow path 44 extends from the upper side in the gravity direction to the lower side in the gravity direction. Therefore, the oil return part 31 can be satisfactorily configured by laminating the plate-like members 11E and 11F.

  Furthermore, since the gas-phase refrigerant flow path 44 makes a U-turn and extends upward in the gravity direction, the oil return portion 31 is configured by effectively using the internal space formed between the plate-like members 11E and 11F. be able to.

  The oil return part 31 is preferably arranged at a position lower than the compressor. This is because it is possible to effectively prevent the liquid phase refrigerant from being sucked into the compressor and effectively prevent liquid compression of the compressor.

  According to the present embodiment, as in the first embodiment, since the plate-like members 11 are joined to each other by the inner fins or the punched portions in the gas-liquid separation space 32, the joining area of the plate-like members 11 is increased. As a result, durability against external pressure and internal pressure can be improved.

(Third embodiment)
In the second embodiment, the oil return portion 31 is configured by the plate-like members 11E and 11F. However, in the third embodiment, as shown in FIG. 11, the oil return portion 31 includes the refrigerant pipe 51 and the oil pipe. 52.

  One end of the refrigerant pipe 51 is connected to the gas-phase refrigerant outlet 36 of the accumulator main body 30, and the other end is connected to the suction side of the compressor 4. Therefore, the refrigerant pipe 51 forms a gas phase refrigerant flow path through which the gas phase refrigerant flowing out from the gas phase refrigerant outlet 36 of the accumulator main body 30 flows.

  One end of the oil pipe 52 is connected to the oil outlet 37 of the accumulator body 30, and the other end is connected to the intermediate part 51 a of the refrigerant pipe 51. Therefore, the connection part 51 a between the refrigerant pipe 51 and the oil pipe 52 constitutes a joining part where oil joins the gas-phase refrigerant flowing through the refrigerant pipe 51.

  Also in the present embodiment, the same operational effects as those of the second embodiment can be obtained.

  The oil return part 31 is preferably arranged at a position lower than the compressor. This is because it is possible to effectively prevent the liquid phase refrigerant from being sucked into the compressor and effectively prevent liquid compression of the compressor.

  In the second embodiment, the pressure loss applying means is configured by forming the gas-phase refrigerant outlet 36 in an orifice shape. However, in the present embodiment, the refrigerant pipe 51 is connected to the oil pipe 52 from the junction 51a. Alternatively, the pressure loss applying means may be configured by forming the upstream portion in an orifice shape.

(Fourth embodiment)
In the second embodiment, the accumulator main body 30 has two upper tank spaces 33. In the fourth embodiment, as shown in FIG. 12, the accumulator main body 30 has three upper tank spaces 33. Have one.

  FIG. 12 is a view of the three upper tank spaces 33 as viewed from the vertical direction (gravity direction). The three upper tank spaces 33 are arranged side by side in the horizontal direction (a direction perpendicular to both the plate stacking direction and the vertical direction).

  The three upper tank spaces 33 communicate with each other at two locations on one end side and the other end side in the plate stacking direction. Of the three upper tank spaces 33, the upper tank space 33 on one end side in the horizontal direction (the lower side in FIG. 12) communicates with the refrigerant inlet 35. A pipe 55 is inserted into the central upper tank space 33 among the three upper tank spaces 33. The pipe 55 constitutes the gas phase refrigerant outlet 36.

  As shown by the arrows in FIG. 12, the refrigerant flowing from the refrigerant inlet 35 is gas-liquid separated by circulating through the three upper tank portions 33. The separated gas-phase refrigerant flows out from the gas-phase refrigerant outlet 36 through the pipe 55.

  Therefore, in this embodiment, the wall surface 56 that divides the three upper tank spaces 33 constitutes a barrier that prevents the refrigerant from flowing linearly from the refrigerant inlet 35 to the gas-phase refrigerant outlet 36.

(Fifth embodiment)
In the fifth embodiment, as shown in FIG. 13, the receiver 1 and the condenser 2 in the first embodiment are constrained by a strip-shaped constraining member 60. The restraining member 60 extends in the stacking direction of the plate-like members 11.

  The restraint member 60 is arrange | positioned at the up-down direction both ends of the receiver 1 and the condenser 2, and is joined to the board lamination direction both ends of the receiver 1 and the condenser 2 by welding. The restraining member 60 may be disposed at the center in the vertical direction of the receiver 1 and the condenser 2.

  In the example of FIG. 13, the restraining member 60 is divided into two at both ends of the receiver 1 and the condenser 2 in the plate stacking direction, but the restraining member 60 is at both ends of the receiver 1 and the condenser 2 in the plate stacking direction. It may be connected by part.

  According to this embodiment, since the restraining member 60 restrains the receiver 1 and the condenser 2 from the outside in the plate stacking direction, it is possible to suppress the receiver 1 and the condenser 2 from extending in the plate stacking direction. Therefore, durability of the receiver 1 and the condenser 2 against repeated pressurization can be enhanced.

(Sixth embodiment)
In the said 5th Embodiment, although the receiver 1 and the condenser 2 are restrained by the restraint member 60, as shown in FIG. 14, in this 6th Embodiment, the receiver 1, the condenser 2, and the evaporator 5 and Is restrained by the restraining member 60.

  The receiver 1, the condenser 2 and the evaporator 5 are integrally formed by laminating and joining a large number of plate-like members, similarly to the receiver 1 and the condenser 2 of the first embodiment. A receiver integrated heat exchanger is configured. The receiver 1 is sandwiched between the condenser 2 and the evaporator 5.

  The restraining member 60 is disposed at both ends of the receiver 1, the condenser 2 and the evaporator 5 in the vertical direction, and is joined to both ends of the receiver 1, the condenser 2 and the evaporator 5 by welding. . The restraining member 60 may be disposed at the center in the vertical direction of the receiver 1, the condenser 2 and the evaporator 5.

  In the example of FIG. 14, the restraining member 60 is divided into two at both ends of the receiver 1, the condenser 2, and the evaporator 5 in the plate stacking direction. It may be connected at both ends in the plate stacking direction.

  According to the present embodiment, since the restraining member 60 restrains the receiver 1, the condenser 2 and the evaporator 5 from the outside in the plate stacking direction, the receiver 1 and the condenser 2 for repeated pressurization as in the fifth embodiment. And durability of the evaporator 5 can be improved.

(Seventh embodiment)
In the fifth and sixth embodiments, the constraining member 60 is formed in a band plate shape, but in the seventh embodiment, as shown in FIG. 15, the constraining member 61 has a rectangular lid shape (a bottomed corner). It is formed in a cylindrical shape.

  The lid-like restraining member 61 is placed on the liquid reservoir integrated heat exchanger such as the receiver 1 and the condenser 2 from above. In the present embodiment, the restraining member 61 does not need to be joined by welding or the like to the plate-like member constituting the liquid reservoir integrated heat exchanger such as the receiver 1 and the condenser 2.

  Also in this embodiment, the same operational effects as those in the fifth and sixth embodiments can be obtained.

(Other embodiments)
The above embodiments can be combined as appropriate. The above embodiment can be variously modified as follows, for example.

  (1) In the said 1st Embodiment, although the receiver 1 and the condenser 2 are integrally formed by lamination | stacking of a plate-shaped member, and comprise the reservoir integrated heat exchanger, the accumulator 3 and the evaporator are It may be integrally formed by laminating plate-like members to constitute a reservoir-integrated heat exchanger.

  In the fifth embodiment, the receiver 1 and the condenser 2 which are liquid reservoir integrated heat exchangers are restrained by the restraining member 60, but the accumulator 3 and the evaporator which are liquid reservoir integrated heat exchangers are It may be restrained by the restraining member 60.

  (2) In the sixth embodiment, the receiver 1, the condenser 2 and the evaporator 5 are integrally formed by laminating plate members, and the receiver 1 is sandwiched between the condenser 2 and the evaporator 5. However, the receiver 1, the condenser 2, and the supercooler may be integrally formed by stacking plate members, and the receiver 1 may be sandwiched between the condenser 2 and the supercooler. The supercooler is a heat exchanger that supercools the liquid refrigerant flowing out of the condenser 2.

  (3) Although the said embodiment demonstrated the example which applied the refrigerating cycle provided with a liquid storage device (receiver 1, accumulator 3) to the vehicle air conditioner, the refrigerating cycle provided with a liquid storage device (receiver 1, accumulator 3) was demonstrated. The application of is not limited to this. For example, the present invention may be applied to a stationary air conditioner, a cold / hot storage, a cooling / heating device for a vending machine, and the like.

1 Receiver (reservoir)
2 Condenser (heat exchanger)
11 Plate-shaped member 11c Communication hole 12 Gas-liquid separation space 14 Lower tank space (tank space)
15 Refrigerant inlet 16 Liquid phase refrigerant outlet 17 Inner fin (joining means)
21 Heat exchange part (refrigerant flow path)
21a Final pass (refrigerant channel group)
22 Upper refrigerant tank space (refrigerant tank space)

Claims (15)

A plate-shaped member (11) is a liquid reservoir configured by stacking and joining each other,
A gas-liquid separation space (12, 32) for separating the refrigerant into a gas phase refrigerant and a liquid phase refrigerant and storing the liquid phase refrigerant is formed between the plate-like members (11).
The gas-liquid separation space (12, 32) is provided with joining means (17, 111) for joining the plate-like members (11) to suppress deformation of the plate-like member (11). Reservoir characterized by.   The said joining means (17, 111) is an intermediate member (17) interposed between said plate-like members (11) and joined to said plate-like member (11). The reservoir as described in. The plate-like member (11) has a punched portion (111) that is punched and formed so as to come into contact with the adjacent plate-like member (11).
2. The liquid reservoir according to claim 1, wherein the plate member (11) is bonded to each other by the punching portion (111) to form the bonding means. A reservoir (1) according to any one of claims 1 to 3,
A heat exchanger (2) for exchanging heat between the refrigerant and the heat exchange fluid;
The liquid reservoir (1) and the heat exchanger (2) are configured by laminating and joining the plate-like members (11) to each other,
The refrigerant to be heat-exchanged in the heat exchanger (2) is a high-pressure side refrigerant of a refrigeration cycle,
A refrigerant flow path (21) for exchanging heat between the refrigerant and the heat exchange fluid by a space formed between the plate-like members (11) constituting the heat exchanger (2), and the refrigerant flow Refrigerant tank spaces (22, 23) for distributing or collecting the refrigerant to the passage (21) are formed,
In the refrigerant flow path (21), the refrigerant flows in the direction of gravity,
As the refrigerant tank space (22, 23), an upper refrigerant tank space (22) disposed above the refrigerant flow path (21) and a lower side of the refrigerant flow path (21). A lower refrigerant tank space (23),
The liquid reservoir (1) includes a refrigerant inlet (15) for allowing the refrigerant heat-exchanged in the heat exchanger (2) to flow into the gas-liquid separation space (12), and the liquid-phase refrigerant as the gas-liquid. Forming a liquid refrigerant outlet (16) to flow out of the separation space (12);
The refrigerant inlet (15) is disposed above the liquid phase refrigerant outlet (16) in the gravity direction and below the upper refrigerant tank space (22) in the gravity direction. Liquid unit integrated heat exchanger. At least some of the plurality of refrigerant channels (21) constitute a refrigerant channel group (21a) disposed adjacent to each other on the most downstream side of the refrigerant,
5. The liquid reservoir-integrated heat exchanger according to claim 4, wherein the refrigerant flows in the refrigerant flow path group (21 a) from the upper side in the gravitational direction toward the lower side in the gravitational direction. . The refrigerant inlet (15) is disposed above the lower refrigerant tank space (23) in the gravity direction,
The plate-like member (11) forming the refrigerant flow path group (21a) is formed with a communication hole (11c) that allows the refrigerant flow paths of the refrigerant flow path group (21a) to communicate with each other. The liquid reservoir integrated heat exchanger according to claim 5. A reservoir (1) according to any one of claims 1 to 3,
A heat exchanger (2) for exchanging heat between the refrigerant and the heat exchange fluid;
The liquid reservoir (1) and the heat exchanger (2) are configured by laminating and joining the plate-like members (11) to each other,
The refrigerant to be heat-exchanged in the heat exchanger (2) is a high-pressure refrigerant in a refrigeration cycle,
A refrigerant flow path (21) for exchanging heat between the refrigerant and the heat exchange fluid by a space formed between the plate-like members (11) constituting the heat exchanger (2), and the refrigerant flow A refrigerant tank space (23) for collecting the refrigerant with respect to the passage (21) is formed;
The liquid reservoir (1) forms a refrigerant inlet (15) through which the refrigerant heat-exchanged in the heat exchanger (2) flows into the gas-liquid separation space (12),
The refrigerant inlet (15) is disposed so as to overlap the refrigerant tank space (23) when viewed from the stacking direction of the plate-like member (11). Heat exchanger. The plate-like member (11) includes an inlet-side plate-like member (11C) having a refrigerant inlet (35) through which the refrigerant flows into the gas-liquid separation space (32), and the gas-phase refrigerant separated from the gas-liquid. An outlet side plate-like member (11D) in which a gas-phase refrigerant outlet (36) flowing out from the space (32) is formed,
The gas-liquid separation space (12, 32) is provided with a barrier (38) that prevents the refrigerant from flowing linearly from the refrigerant inlet (35) to the gas-phase refrigerant outlet (36). The liquid reservoir according to any one of claims 1 to 3.   The liquid reservoir according to claim 8, further comprising oil return means (31) for joining oil in the liquid phase refrigerant to the gas phase refrigerant flowing out from the gas phase refrigerant outlet (36). Pressure loss applying means (36) for applying pressure loss to the gas-phase refrigerant,
The oil return means (31) has a junction (42) where the gas-phase refrigerant and the oil merge,
The liquid reservoir according to claim 9, wherein the pressure loss applying means (36) is disposed between the gas-liquid separation space (32) and the merging portion (42). The oil return means (31) is configured by laminating and joining the plate-like members (11) to each other,
A gas phase refrigerant flow path (44) through which the gas phase refrigerant flows is formed by a space formed between the plate-like members (11) constituting the oil return means (31). The liquid reservoir according to claim 9 or 10. The plate-like member (11) constituting the oil return means (31) has a gas-phase refrigerant inlet (41) for allowing the gas-phase refrigerant to flow into the gas-phase refrigerant channel (44), and the oil. An oil inlet (42) for flowing into the gas-phase refrigerant channel (44) is formed;
The oil inlet (42) is disposed below the gas-phase refrigerant inlet (35) in the gravity direction,
The liquid reservoir according to claim 11, wherein the gas-phase refrigerant flow path (44) extends from the upper side in the gravity direction toward the lower side in the gravity direction. The plate-like member (11) constituting the oil return means (31) is formed with a refrigerant oil outlet (43) through which the gas-phase refrigerant and the oil flow out from the gas-phase refrigerant channel (44),
The refrigerant oil outlet (43) is disposed above the oil inlet (42) in the gravity direction,
13. The storage according to claim 12, wherein the gas-phase refrigerant flow path (44) extends from the upper side in the gravitational direction toward the lower side in the gravitational direction, and further U-turns and extends upward in the gravitational direction. Liquid container. The gas-liquid separation space (12, 32) has a tank space (14, 34) for collecting the liquid-phase refrigerant,
Of the plurality of plate-like members (11), the plate-like member (11B) located on the outermost side in the stacking direction has a desiccant that removes moisture in the liquid refrigerant in the tank space (14, 34), The reservoir according to any one of claims 1 to 3, wherein an insertion hole (18) for inserting a filter for removing dust in the liquid-phase refrigerant is formed. A reservoir (1, 3) according to any one of claims 1 to 3,
A heat exchanger (2, 5) for exchanging heat between the refrigerant and the heat exchange fluid;
The liquid reservoir (1, 3) and the heat exchanger (2, 5) are configured by laminating and joining the plate-like members (11) to each other,
Furthermore, with respect to the reservoir (1, 3) and the heat exchanger (2, 5), the reservoir (1, 3) and a heat exchanger (2) integrated with a heat exchanger (2), comprising a restraining member (60, 61) for restraining the heat exchanger (2) from the outside in the stacking direction.

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