JP6322982B2 - Refrigerant evaporator - Google Patents

Description

  The present invention relates to a refrigerant evaporator that cools a fluid to be cooled by absorbing heat from the fluid to be cooled and evaporating the refrigerant.

  The refrigerant evaporator functions as a cooling heat exchanger that cools the fluid to be cooled by absorbing heat from the fluid to be cooled (for example, air) flowing outside and evaporating the refrigerant (liquid phase refrigerant) flowing inside. .

  As this type of refrigerant evaporator, the first and second evaporation parts including a heat exchange core part formed by laminating a plurality of tubes and a pair of tank parts connected to both ends of the plurality of tubes are covered. A configuration is known in which the tanks are arranged in series in the flow direction of the cooling fluid, and one tank unit in each evaporation unit is connected via a pair of communication units (see, for example, Patent Document 1).

  In the refrigerant evaporator of Patent Document 1, the refrigerant that has flowed through the heat exchange core portion of the first evaporation portion is secondly passed through one tank portion of each evaporation portion and a pair of communication portions that connect the tank portions. When flowing through the heat exchange core part of the evaporation part, the refrigerant flow is changed in the width direction (left-right direction) of the heat exchange core part. That is, in the refrigerant evaporator, the refrigerant flowing on one side in the width direction of the heat exchange core portion of the first evaporation portion is caused to flow in the width direction of the heat exchange core portion of the second evaporation portion by one of the pair of communication portions. The refrigerant is caused to flow to the other side, and the refrigerant flowing on the other side in the width direction of the heat exchange core part of the first evaporation part is caused to flow to one side in the width direction of the heat exchange core part of the second evaporation part. Yes.

Japanese Patent No. 4124136

  However, like the refrigerant evaporator of Patent Document 1, when the refrigerant flow direction is changed by dividing one tank to which the communicating portion is connected among the pair of tank portions of each evaporation portion in the tube stacking direction, When the refrigerant from the heat exchange core part of the first evaporation part flows to the heat exchange core part of the second evaporation part, the liquid-phase refrigerant is distributed unevenly to a part of the heat exchange core part of the second evaporation part. There is.

  Specifically, the liquid-phase refrigerant that has flowed into the first evaporation section tends to easily flow into a tube located near the introduction section of the liquid-phase refrigerant, and the laminated refrigerant is sufficiently supplied to the tube far from the introduction section. Can't flow. For this reason, while the liquid refrigerant sufficiently flows on one side in the width direction of the heat exchange core part of the second evaporation part, the refrigerant flowing on the other side in the width direction of the heat exchange core part of the second evaporation part passes through the superheated gas region. Become.

  Thus, when the distribution property of the liquid phase refrigerant in the refrigerant evaporator deteriorates, an area where heat exchange between the fluid to be cooled and the refrigerant is not effectively performed occurs in the heat exchange core portion of the second evaporation unit. As a result, when the refrigerant radiator is viewed from the flow direction of the blown air, a temperature distribution is generated in the width direction of the heat exchange core portion.

  In view of the above points, an object of the present invention is to provide a refrigerant evaporator that can suppress deterioration of refrigerant distribution.

In order to achieve the above object, the invention according to claim 1 includes a first evaporator (20) and a second evaporator (10) arranged in series with respect to the flow direction of the fluid to be cooled. Each of the evaporation section (20) and the second evaporation section (10) has a heat exchange core section (11, 21) configured by stacking a plurality of tubes (111, 211) through which a refrigerant flows, and the first evaporation The heat exchange core part (21) in the part (20) is composed of a first core part (21a) constituted by a part of the tube groups and a part of other tube groups among the plurality of tubes (211). The heat exchange core part (11) in the second evaporation part (10) is the first core part in the flow direction of the fluid to be cooled among the plurality of tubes (111). Consists of a tube group facing at least a part of (21a) A third core portion (11a) and a fourth core portion (11b) composed of a tube group facing at least a part of the second core portion (21b) in the flow direction of the fluid to be cooled. In the evaporator (20) and the second evaporator (10), the refrigerant from the first core part (21a) is guided to the fourth core part (11b), and the refrigerant from the second core part (21b) is the first. The first evaporating part (20) is provided with a refrigerant introducing part (220) for introducing the refrigerant into the first evaporating part (20). The heat exchange core part (21) in the first evaporation part (20) is a tube (211) belonging to the first core part (21a) and the second core part (21b) among the plurality of tubes (211). Fifth core part (2) composed of a tube group other than c), and the first core portion (21a), the second core portion (21b), and the fifth core portion (21c) are arranged on the first core portion (21a), the second core portion (21c) from the side closer to the refrigerant introduction portion (220). The two core portions (21b) and the fifth core portion (21c) are arranged in this order, and the fifth core portion (21c) faces at least a part of the fourth core portion (11b) in the flow direction of the fluid to be cooled. And refrigerant distribution means (134, 234) for distributing the refrigerant flowing out of the first core part (21a) to the fourth core part (11b) and the fifth core part (21c). Features.

  According to this, the 5th core part (21c) which opposes at least one part of the 4th core part (11b) in the flow direction of a to-be-cooled fluid to the heat exchange core part (21) in a 1st evaporation part (20). And refrigerant distribution means (134, 234) for distributing the refrigerant flowing out from the first core part (21a) to the fourth core part (11b) and the fifth core part (21c). The refrigerant flowing into the core part (21a) is distributed to the fourth core part (11b) and the fifth core part (21c) by the refrigerant distribution means (134, 234).

  At this time, a 1st core part (21a), a 2nd core part (21b), and a 5th core part (21c) are arrange | positioned in this order from the side close | similar to a refrigerant | coolant introducing | transducing part (220), The liquid-phase refrigerant easily flows into 21a), and the flow rate of the liquid-phase refrigerant distributed to the fourth core part (21b) and the fifth core part (21c) increases.

  When the refrigerant evaporator is viewed from the flow direction of the fluid to be cooled, the fifth core portion (21c) is opposed to at least a part of the fourth core portion (11b) in the flow direction of the fluid to be cooled. The liquid phase refrigerant is allowed to flow through the polymerization portion of the fourth core portion (11b) and the fifth core portion (21c), which is a portion where it is difficult for the liquid phase refrigerant to flow if it is conventional, far from the refrigerant introduction portion (220). it can. For this reason, it is possible to suppress the deterioration of refrigerant distribution.

In the invention according to claim 2 , the first evaporator (20) includes the first evaporator (20) and the second evaporator (10) arranged in series with respect to the flow direction of the fluid to be cooled. Each of the second evaporation section (10) has a heat exchange core section (11, 21) configured by stacking a plurality of tubes (111, 211) through which a refrigerant flows, and in the first evaporation section (20) A heat exchange core part (21) is a 1st core part (21a) comprised by some tube groups among several tubes (211), and the 2nd core part (21b) comprised by the remaining tube groups. The heat exchange core part (11) in the second evaporation part (10) includes at least a part of the first core part (21a) in the flow direction of the fluid to be cooled among the plurality of tubes (111). A third core portion (11 ), And a fourth core portion (11b) composed of a tube group facing at least a part of the second core portion (21b) in the flow direction of the fluid to be cooled. In the second evaporation section (10), the refrigerant from the first core section (21a) is guided to the fourth core section (11b), and the refrigerant from the second core section (21b) flows to the third core section (11a). In the second evaporation section (10), the second evaporation section (10) is closer to the fourth core section (11b) than the third core section (11a) from the inside of the second evaporation section (10). A refrigerant derivation section (120) for deriving the refrigerant is provided, and a refrigerant introduction channel for introducing the refrigerant into the first evaporation section (20) is formed in the first evaporation section (20). The refrigerant introduction flow path forming member (40) is connected, and the refrigerant introduction flow path The refrigerant outlet portion of the component member (40) is connected to the side closer to the first core portion (21a) than the second core portion (21b) in the first evaporation portion (20), and the refrigerant introduction flow path forming member The refrigerant inlet part of (40) is arranged closer to the second core part (21b) than the first core part (21a).

  According to this, the refrigerant from the first core part (21a) is guided to the fourth core part (11b) through the second evaporator part (20) and the second evaporator part (10). In the heat exchange core portion (11, 21), the refrigerant flow from the refrigerant 21b) is guided to the third core portion (11a) in the width direction of the heat exchange core portion (11, 21). (The stacking direction of the tubes 111 and 211) can be changed.

  Here, in the third core portion (11a) and the fourth core portion (11b), the refrigerant is sucked toward the refrigerant outlet portion (120). For this reason, in each of the third core part (11a) and the fourth core part (11b), a part where the liquid-phase refrigerant hardly flows is generated on the side far from the refrigerant outlet part (120). Thereby, when the refrigerant evaporator is viewed from the flow direction of the fluid to be cooled, the first core portion in the heat exchange core portions (11, 21) of the first evaporation portion (20) and the second evaporation portion (10). There is a possibility that a portion in which the liquid-phase refrigerant does not flow easily is generated on the side far from the refrigerant outlet portion (120) where the (21a) and the third core portion (11a) are polymerized, and the temperature distribution may be deteriorated.

  On the other hand, the refrigerant outlet part of the refrigerant introduction flow path forming member (40) for introducing the refrigerant into the first evaporation part (20) is more than the second core part (21b) in the first evaporation part (20). By connecting to the side closer to the one core part (21a), the first core part (21a) and the second core part (21b) are connected to the entire area of the first core part (21a) far from the refrigerant outlet part (120). It becomes easier for the refrigerant to flow.

  Thereby, when the refrigerant evaporator is viewed from the flow direction of the fluid to be cooled, the first core portion in the heat exchange core portions (11, 21) of the first evaporation portion (20) and the second evaporation portion (10). Liquid phase refrigerant can be flown over the entire region where (21a) and the third core portion (11a) are polymerized. For this reason, it is possible to suppress the deterioration of refrigerant distribution.

  At this time, the refrigerant inlet part of the refrigerant introduction flow path forming member (40) is arranged closer to the second core part (21b) than the first core part (21a), so that the refrigerant is introduced in the refrigerant evaporator. The refrigerant inlet part and the refrigerant outlet part (120) of the flow path forming member (40) can be arranged on the same side. Thereby, the manageability of the refrigerant piping connected to the refrigerant evaporator 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 typical perspective view of the refrigerant evaporator concerning a 1st embodiment. It is a disassembled perspective view of the refrigerant evaporator shown in FIG. It is explanatory drawing for demonstrating the flow of the refrigerant | coolant in the refrigerant evaporator which concerns on 1st Embodiment. It is explanatory drawing for demonstrating distribution of the liquid phase refrigerant | coolant which flows through each heat exchange core part of the refrigerant evaporator which concerns on 1st Embodiment. It is a typical exploded perspective view of the refrigerant evaporator concerning a 2nd embodiment. It is explanatory drawing for demonstrating the flow of the refrigerant | coolant in the refrigerant evaporator which concerns on 2nd Embodiment. It is explanatory drawing for demonstrating distribution of the liquid phase refrigerant | coolant which flows through each heat exchange core part of the refrigerant evaporator which concerns on 2nd Embodiment. It is a typical exploded perspective view of the refrigerant evaporator concerning a 3rd embodiment. It is explanatory drawing for demonstrating the flow of the refrigerant | coolant in the refrigerant evaporator which concerns on 3rd Embodiment. It is explanatory drawing for demonstrating distribution of the liquid phase refrigerant | coolant which flows through each heat exchange core part of the refrigerant evaporator which concerns on 3rd Embodiment. It is a typical exploded perspective view of the refrigerant evaporator concerning a 4th embodiment. It is explanatory drawing for demonstrating the flow of the refrigerant | coolant in the refrigerant evaporator which concerns on 4th Embodiment. It is a typical exploded perspective view of the refrigerant evaporator concerning a 5th embodiment. It is explanatory drawing for demonstrating distribution of the liquid phase refrigerant | coolant which flows through each heat exchange core part of the refrigerant evaporator which concerns on 5th 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)
A first embodiment of the present invention will be described with reference to the drawings. The refrigerant evaporator 1 according to the present embodiment is applied to a vapor compression refrigeration cycle of a vehicle air conditioner that adjusts the temperature in the passenger compartment, and absorbs heat from the blown air that is blown into the passenger compartment to form a refrigerant (liquid phase refrigerant). It is a heat exchanger for cooling which cools blowing air by evaporating. In the present embodiment, the blown air corresponds to the “cooled fluid flowing outside” in the claims.

  As is well known, the refrigeration cycle includes a compressor, a radiator (condenser), an expansion valve, and the like (not shown) in addition to the refrigerant evaporator 1, and in this embodiment, liquid is received between the radiator and the expansion valve. It is configured as a receiver cycle in which a device is arranged. The refrigerant of the refrigeration cycle is mixed with refrigeration oil for lubricating the compressor, and a part of the refrigeration oil circulates in the cycle together with the refrigerant.

  Here, in FIG. 2, illustration of the tubes 111 and 211 and the fins 112 and 212 in each heat exchange core part 11 and 21 mentioned later is abbreviate | omitted.

  As shown in FIGS. 1 and 2, the refrigerant evaporator 1 according to the present embodiment includes two evaporators 10 and 20 arranged in series with respect to the flow direction (flow direction of the fluid to be cooled) X of the blown air. It is prepared for. Here, in this embodiment, the evaporation part arrange | positioned among the two evaporation parts 10 and 20 on the windward side (upstream side) of the air flow direction of blowing air is called the windward evaporation part 10, and the flow of blowing air The evaporator disposed on the leeward side (downstream side) in the direction is referred to as a leeward evaporator 20. The upwind evaporator 10 in the present embodiment constitutes the “second evaporator” in the claims, and the downwind evaporator 20 constitutes the “first evaporator” in the claims. Yes.

  The basic configurations of the windward side evaporator 10 and the leeward side evaporator 20 are the same, and the heat exchange core parts 11 and 21 and a pair of tank parts 12 disposed on the upper and lower sides of the heat exchange core parts 11 and 21, respectively. 13, 22, and 23.

  In the present embodiment, the heat exchange core part in the windward evaporator 10 is referred to as the windward heat exchange core part 11, and the heat exchange core part in the leeward evaporator 20 is referred to as the leeward heat exchange core part 21. Of the pair of tank portions 12 and 13 in the windward side evaporation unit 10, the tank portion disposed on the upper side is referred to as a first windward tank portion 12, and the tank portion disposed on the lower side is referred to as the second windward side. This is referred to as a tank portion 13. Similarly, of the pair of tank parts 22 and 23 in the leeward side evaporation part 20, the tank part arranged on the upper side is referred to as the first leeward side tank part 22, and the tank part arranged on the lower side is referred to as the second leeward side. This is referred to as a side tank portion 23.

  Each of the windward side heat exchange core part 11 and the leeward side heat exchange core part 21 of the present embodiment includes a plurality of tubes 111 and 211 extending in the vertical direction and fins 112 and 212 joined between the adjacent tubes 111 and 211. And a laminate in which layers are alternately arranged. Hereinafter, the stacking direction in the stacked body of the plurality of tubes 111 and 211 and the plurality of fins 112 and 212 is referred to as a tube stacking direction.

  Here, the windward side heat exchange core part 11 is the 2nd wind comprised by the 1st windward heat exchange core part 11a comprised by some tube groups among the some tubes 111, and the remaining tube group. It has the upper side heat exchange core part 11b. In addition, the 1st windward heat exchange core part 11a in this embodiment comprises the "3rd core part" in a claim, and the 2nd windward heat exchange core part 11b is the "first" in a claim. 4 core part "is comprised.

  In the present embodiment, when the windward heat exchange core part 11 is viewed from the flow direction of the blown air, the first windward heat exchange core part 11a is configured by a tube group existing on the right side of the tube lamination direction, and the tube lamination direction The second upwind heat exchange core portion 11b is configured by a tube group existing on the left side of the above.

  Moreover, the leeward side heat exchange core part 21 is the 2nd leeward side comprised by the 1st leeward side heat exchange core part 21a comprised by some tube groups among the some tubes 211, and the remaining tube group. It has a heat exchange core portion 21b. In addition, the 1st leeward side heat exchange core part 21a in this embodiment comprises the "1st core part" in a claim, and the 2nd leeward side heat exchange core part 21b is the "first" in a claim. 2 core part "is comprised.

  In this embodiment, when the leeward heat exchange core portion 21 is viewed from the flow direction of the blown air, the first leeward heat exchange core portion 21a is configured by a tube group existing on the right side of the tube lamination direction, and the tube lamination direction The second leeward heat exchange core portion 21b is configured by a tube group existing on the left side of the leeward side. In the present embodiment, the first windward side heat exchange core portion 11a and the first leeward side heat exchange core portion 21a are arranged so as to overlap (opposite) when viewed from the flow direction of the blown air. The second leeward side heat exchange core part 11b and the second leeward side heat exchange core part 21b are arranged so as to overlap (oppose) each other.

  Each of the tubes 111 and 211 includes a flat tube in which a refrigerant passage through which a refrigerant flows is formed and a cross-sectional shape thereof is a flat shape extending along the flow direction of the blown air.

  The tube 111 of the windward side heat exchange core part 11 has one end side (upper end side) in the longitudinal direction connected to the first windward tank part 12, and the other end side (lower end side) in the longitudinal direction is the second windward side. It is connected to the tank unit 13. The tube 211 of the leeward heat exchange core portion 21 has one end side (upper end side) in the longitudinal direction connected to the first leeward tank portion 22 and the other end side (lower end side) in the longitudinal direction is second. The leeward tank unit 23 is connected.

  Each of the fins 112 and 212 is a corrugated fin formed by bending a thin plate material into a wave, joined to the flat outer surface side of the tubes 111 and 211, and heat for expanding the heat transfer area between the blown air and the refrigerant. It constitutes an exchange promoting means.

  In the laminated body of the tubes 111 and 211 and the fins 112 and 212, side plates 113 and 213 that reinforce the heat exchange core parts 11 and 12 are arranged at both ends in the tube lamination direction. The side plates 113 and 213 are joined to the fins 112 and 212 arranged on the outermost side in the tube stacking direction.

  The first upwind tank unit 12 is closed at one end (the left end when viewed from the flow direction of the blown air) and at the other end (the right end when viewed from the flow direction of the blown air). Further, it is composed of a cylindrical member in which a refrigerant outlet 120 for leading the refrigerant from the inside of the tank to the suction side of a compressor (not shown) is formed. The first upwind tank unit 12 has a through hole (not shown) in which one end side (upper end side) of each tube 111 is inserted and joined at the bottom. That is, the first upwind tank unit 12 is configured such that the internal space thereof communicates with each tube 111 of the upwind heat exchange core unit 11, and the core units 11 a and 11 b of the upwind heat exchange core unit 11. It functions as a refrigerant collecting part that collects the refrigerant from.

  The first leeward tank section 22 is closed at one end, and has a cylinder formed with a refrigerant introduction section 220 for introducing low-pressure refrigerant decompressed by an expansion valve (not shown) into the tank at the other end. It is comprised by the shape-shaped member. The first leeward tank portion 22 has a through hole (not shown) in which one end side (upper end side) of each tube 211 is inserted and joined at the bottom. That is, the 1st leeward side tank part 22 is comprised so that the internal space may connect with each tube 211 of the leeward side heat exchange core part 21, and each core part 21a, 21b of the leeward side heat exchange core part 21 is comprised. It functions as a refrigerant distribution unit that distributes the refrigerant.

  The 2nd windward side tank part 13 is comprised with the cylindrical member by which the both end sides were obstruct | occluded. The second upwind tank portion 13 has a through hole (not shown) in which the other end side (lower end side) of each tube 111 is inserted and joined to the ceiling portion. That is, the second upwind tank unit 13 is configured such that its internal space communicates with each tube 111.

  In addition, a first partition member 131 is disposed at a central position in the longitudinal direction inside the second windward tank section 13, and the tank interior space is formed by the first partition member 131 so that the first windward heat exchange core is disposed. It is partitioned into a space where each tube 111 composing the portion 11a communicates and a space where each tube 111 composing the second upwind heat exchange core portion 11b communicates.

  Here, in the inside of the second upwind tank unit 13, the space communicating with each tube 111 constituting the first upwind heat exchange core unit 11a distributes the refrigerant to the first upwind heat exchange core unit 11a. A second refrigerant distributor that constitutes the first refrigerant distributor 13a and that communicates with the tubes 111 constituting the second windward heat exchange core 11b distributes the refrigerant to the second windward heat exchange core 11b. 13b is constituted.

  The 2nd leeward side tank part 23 is comprised with the cylindrical member by which the both end sides were obstruct | occluded. The second leeward tank portion 23 has a through hole (not shown) in which the other end side (lower end side) of each tube 211 is inserted and joined to the ceiling portion. That is, the second leeward tank unit 23 is configured such that the internal space thereof communicates with each tube 211.

  A second partition member 231 is disposed inside the second leeward tank unit 23 at a central position in the longitudinal direction, and the second partition member 231 causes the tank internal space to be in the first leeward heat exchange core unit 21a. Are partitioned into a space in which the tubes 211 composing each other communicate with each other and a space in which each tube 211 constituting the second leeward heat exchange core portion 21b communicates with each other.

  Here, in the inside of the second leeward side tank part 23, the space communicating with each tube 211 constituting the first leeward side heat exchange core part 21a collects the refrigerant from the first leeward side heat exchange core part 21a. The second refrigerant that constitutes the first refrigerant collecting portion 23a to be communicated and in which the space where the tubes 211 constituting the second leeward heat exchange core portion 21b communicate with each other collects refrigerant from the second leeward heat exchange core portion 21b. The aggregation unit 23b is configured.

  Hereinafter, a characteristic configuration of the present embodiment will be described. As shown in FIG. 2, the 1st windward heat exchange core part 11a is the 1st windward comprised by some tube groups among the some tubes 111 which comprise the 1st windward heat exchange core part 11a. It has the 2nd windward small core part 112a comprised by the small core part 111a and the remaining tube group. In addition, the 1st windward small core part 111a in this embodiment comprises the "3rd small core part" in a claim, and the 2nd windward small core part 112a is "4th in a claim." "Small core part".

  In this embodiment, when the 1st windward heat exchange core part 11a is seen from the flow direction of blowing air, the 1st windward small core part 111a is comprised by the tube group which exists in the right side of a tube lamination direction, and tube lamination | stacking is carried out. The second windward small core portion 112a is configured by a tube group existing on the left side in the direction.

  The second upwind heat exchange core portion 11b includes a third upwind small core portion 111b constituted by a part of a tube group among the plurality of tubes 111 constituting the second upwind heat exchange core portion 11b, and the remaining portion. The 4th windward small core part 112b comprised by these tube groups is provided.

  In the present embodiment, when the second upwind heat exchange core portion 11b is viewed from the flow direction of the blown air, the third upwind small core portion 111b is configured by a tube group existing on the right side of the tube stacking direction, and the tube stacking is performed. The fourth windward small core portion 112b is configured by a group of tubes existing on the left side in the direction.

  The 1st leeward side heat exchange core part 21a is the 1st leeward side small core part 211a comprised by some tube groups among the some tubes 211 which comprise the 1st leeward side heat exchange core part 21a, and the remainder. The 2nd leeward side small core part 212a comprised by these tube groups is provided. In addition, the 1st leeward side small core part 211a in this embodiment comprises the "1st small core part" in a claim, and the 2nd leeward side small core part 212a is "2nd in a claim." "Small core part".

  In this embodiment, when the 1st leeward side heat exchange core part 21a is seen from the flow direction of blowing air, the 1st leeward side small core part 211a is comprised with the tube group which exists in the right side of a tube lamination direction, and tube lamination The second leeward small core portion 212a is configured by a tube group existing on the left side in the direction. In the present embodiment, the first downwind small core portion 111a and the first downwind small core portion 211a are arranged so as to overlap (opposite) when viewed from the flow direction of the blown air. The two leeward small core portions 112a and the second leeward small core portion 212a are arranged so as to overlap (oppose) each other.

  The second leeward side heat exchange core part 21b includes a third leeward side small core part 211b constituted by a part of the tube group among the plurality of tubes 211 constituting the second leeward side heat exchange core part 21b, and the remaining part. 4th leeward side small core part 212b comprised by these tube groups.

  In the present embodiment, when the second leeward side heat exchange core portion 21b is viewed from the flow direction of the blown air, the third leeward side small core portion 211b is configured by a tube group existing on the right side in the tube stacking direction, A tube group existing on the left side of the direction constitutes the fourth leeward small core portion 212b. In the present embodiment, the third windward small core portion 111b and the third leeward small core portion 211b are arranged so as to overlap (oppose) when viewed from the flow direction of the blown air, and the first The 4 leeward small cores 112b and the 4th leeward small core 212b are arranged so as to overlap (oppose) each other.

  A third partition member 221 is disposed inside the first leeward tank unit 22, and the third partition member 221 allows the tank internal space to be formed into a first leeward heat exchange core unit 21 a (first leeward side small size). The space where the tubes 211 constituting the core portion 211a and the second leeward small core portion 212a communicate with each other, and the second leeward heat exchange core portion 21b (the third leeward small core portion 211b and the fourth leeward small core). The section 211b) is partitioned into spaces in which the tubes 211 constituting the section 212b) communicate with each other.

  Here, in the inside of the first leeward side tank part 22, the space communicating with each tube 211 constituting the first leeward side heat exchange core part 21a distributes the refrigerant to the first leeward side heat exchange core part 21a. The second refrigerant distribution unit that configures the first refrigerant distribution unit 22a and that communicates with the tubes 211 that configure the second leeward heat exchange core unit 21b distributes the refrigerant to the second leeward heat exchange core unit 21b. 22b is configured.

  A fourth partition member 232 is disposed inside the first refrigerant collecting portion 23a of the second leeward tank portion 23 at the center position in the longitudinal direction of the first refrigerant collecting portion 23a. By the fourth partition member 232, the space in which the tubes 211 constituting the first leeward small core portion 211a communicate with the first refrigerant collecting portion 23a and the tubes 211 constituting the second leeward small core portion 212a are formed. It is partitioned into a communicating space.

  Here, in the first refrigerant collecting portion 23a, the first small set in which the space communicating with each tube 211 constituting the first leeward small core portion 211a collects the refrigerant from the first leeward small core portion 211a. The space that constitutes the portion 231a and communicates with the respective tubes 211 constituting the second leeward small core portion 212a constitutes a second small collecting portion 232a that collects refrigerant from the second leeward small core portion 212a.

  A fifth partition member 233 is disposed inside the second refrigerant collecting portion 23b of the second leeward tank portion 23 at the center position in the longitudinal direction of the second refrigerant collecting portion 23b. By the fifth partitioning member 233, the space in which the tubes 211 constituting the third leeward small core portion 211b communicate with the second refrigerant collecting portion 23b and the tubes 211 constituting the fourth leeward small core portion 212b are formed. It is partitioned into a communicating space.

  Here, in the second refrigerant collecting portion 23b, the third small set in which the spaces communicating with the respective tubes 211 constituting the third leeward small core portion 211b collect the refrigerant from the third leeward small core portion 211b. A space in which the tubes 211 constituting the part 231b and the fourth leeward small core part 212b communicate with each other constitutes a fourth small collecting part 232b that collects the refrigerant from the fourth leeward small core part 212b.

  A sixth partition member 132 is disposed inside the first refrigerant distribution unit 13a of the second upwind tank unit 13 at the center position in the longitudinal direction of the first refrigerant distribution unit 13a. By the sixth partition member 132, the space in which the tubes 111 constituting the first windward small core portion 111a communicate with the first refrigerant distribution portion 13a and the tubes 111 constituting the second windward small core portion 112a are connected. It is partitioned into a communicating space.

  Here, in the first refrigerant distribution part 13a, the space communicating with each tube 111 constituting the first windward small core part 111a distributes the refrigerant to the first windward small core part 111a. A space that communicates with each tube 111 that constitutes 131a and constitutes the second upwind small core portion 112a constitutes a second small distribution portion 132a that distributes the refrigerant to the second upwind small core portion 112a.

  A seventh partition member 133 is disposed inside the second refrigerant distributor 13b of the second upwind tank unit 13 at the center position in the longitudinal direction of the second refrigerant distributor 13b. The seventh partition member 133 allows the second refrigerant distribution portion 13b to communicate with the space where the tubes 111 constituting the third windward small core portion 111b communicate with each tube 111 constituting the fourth windward small core portion 112b. It is partitioned into a communicating space.

  Here, in the second refrigerant distribution unit 13b, a space communicating with each tube 111 constituting the third upwind small core unit 111b distributes the refrigerant to the third upwind small core unit 111b. A space communicating with each tube 111 constituting the fourth upwind small core portion 112b constitutes a fourth small distribution portion 132b that distributes the refrigerant to the fourth upwind small core portion 112b.

  The second leeward tank unit 13 and the second leeward tank unit 23 are connected via a first refrigerant replacement unit 31 and a second refrigerant replacement unit 32, respectively. The first refrigerant replacement unit 31 guides the refrigerant in the first small collection unit 231a in the second leeward tank unit 23 to the second small distribution unit 132a in the second leeward tank unit 13, and the second leeward tank unit The refrigerant in the second small collecting portion 232a at 23 is guided to the first small distribution portion 131a in the second upwind tank portion 13. That is, the 1st refrigerant | coolant replacement | exchange part 31 is comprised so that the flow of a refrigerant | coolant may be replaced in the core width direction in the 1st windward side heat exchange core part 11a and the 1st leeward side heat exchange core part 21a.

  The second refrigerant replacement unit 32 guides the refrigerant in the third small collection unit 231b in the second leeward tank unit 23 to the fourth small distribution unit 132b in the second leeward tank unit 13 and also the second leeward tank unit. The refrigerant in the fourth small collecting portion 232b at 23 is guided to the third small distributing portion 131b in the second upwind tank portion 13. That is, the 2nd refrigerant | coolant replacement | exchange part 32 is comprised so that the flow of a refrigerant | coolant may be replaced in the core width direction in the 2nd leeward side heat exchange core part 11b and the 2nd leeward side heat exchange core part 21b.

  Specifically, the first refrigerant replacement part 31 communicates the first small collecting part 231a in the second leeward tank part 23 and the second small distribution part 132a in the second leeward tank part 13 with each other. And a second connecting member 31b that allows the second small collecting portion 232a in the second leeward tank portion 23 and the first small distribution portion 131a in the second leeward tank portion 13 to communicate with each other.

  Each of the first connecting member 31a and the second connecting member 31b is configured by a cylindrical member in which a refrigerant flow passage through which a refrigerant flows is formed. The first connecting member 31 a and the second connecting member 31 b are joined to each other in a state of being disposed adjacent to the longitudinal direction of the tubes 111 and 211.

  The second refrigerant replacement unit 32 includes a third connecting member 32a that communicates the third small collecting portion 231b in the second leeward tank portion 23 and the fourth small distributing portion 132b in the second leeward tank portion 13, and a second leeward The fourth small collecting portion 232b in the side tank portion 23 and the fourth connecting member 32b for communicating the third small distribution portion 131b in the second upwind tank portion 13 are configured.

  Each of the third connecting member 32a and the fourth connecting member 32b is configured by a cylindrical member in which a refrigerant flow passage through which a refrigerant flows is formed. The 3rd connection member 32a and the 4th connection member 32b are mutually joined in the state arrange | positioned adjacent to the longitudinal direction of the tubes 111 and 211. FIG.

  Next, the flow of the refrigerant in the refrigerant evaporator 1 according to the present embodiment will be described with reference to FIG. In addition, in FIG. 3, illustration of each tank part 12, 13, 22, 23 and each refrigerant | coolant replacement | exchange part 31 and 32 is abbreviate | omitted.

  As shown in FIG. 3, the low-pressure refrigerant decompressed by the expansion valve (not shown) is introduced into the tank from the refrigerant introduction part 220 of the first leeward tank part 22 as indicated by an arrow A. A part of the refrigerant introduced into the first leeward tank unit 22 flows into the first refrigerant distribution unit 22a as shown by an arrow B, and the remaining refrigerant introduced into the first leeward tank unit 22 is As shown by the arrow C, the refrigerant flows into the second refrigerant distributor 22b.

  The refrigerant that has flowed into the first refrigerant distribution portion 22a descends the first leeward side small core portion 211a of the leeward side heat exchange core portion 21 as indicated by an arrow D, and the first small aggregate portion 231a of the second leeward side tank portion 23. As shown by the arrow E, the second leeward small core portion 212a of the leeward heat exchange core portion 21 descends and flows into the second small collecting portion 232a of the second leeward tank portion 23.

  The refrigerant that has flowed into the second refrigerant distribution part 22b descends the third leeward small core part 211b of the leeward heat exchange core part 21 as indicated by the arrow F, and the third small collecting part 231b of the second leeward tank part 23. As shown by the arrow G, the fourth leeward small core portion 212b of the leeward heat exchange core portion 21 descends and flows into the fourth small gathering portion 232b of the second leeward tank portion 23.

  The refrigerant that has flowed into the first small collecting portion 231a flows into the second small distribution portion 132a of the second upwind tank portion 13 through the first connecting member 31a as indicated by an arrow H. The refrigerant that has flowed into the first small collecting portion 231a flows into the first small distribution portion 131a of the second upwind tank portion 13 through the second connecting member 31b as indicated by an arrow I.

  The refrigerant that has flowed into the third small collecting portion 231b flows into the fourth small distributing portion 132b of the second upwind tank portion 13 through the third connecting member 32a as indicated by an arrow J. The refrigerant that has flowed into the fourth small collecting portion 232b flows into the third small distributing portion 131b of the second upwind tank portion 13 through the fourth connecting member 32b as indicated by an arrow K.

  The refrigerant that has flowed into the second small distribution part 132a moves up the second windward small core part 112a of the windward heat exchange core part 11 as indicated by an arrow L and flows into the tank of the first windward tank part 12. The refrigerant that has flowed into the first small distribution part 131a ascends the first windward small core part 111a of the windward heat exchange core part 11 as indicated by an arrow M and flows into the tank of the first windward tank part 12.

  The refrigerant that has flowed into the fourth small distribution portion 132b moves up the fourth windward small core portion 112b of the windward heat exchange core portion 11 as indicated by an arrow N and flows into the tank of the first windward tank portion 12. The refrigerant that has flowed into the third small distribution part 131b moves up the third windward small core part 111b of the windward heat exchange core part 11 as indicated by an arrow O and flows into the tank of the first windward tank part 12.

  The refrigerant that has flowed into the tank of the first upwind tank section 12 is led out from the refrigerant outlet section 120 of the first upwind tank section 12 to the compressor (not shown) suction side as indicated by an arrow P.

  As described above, in the present embodiment, the flow of the refrigerant flowing into the first upwind heat exchange core portion 11a (hereinafter referred to as the first refrigerant flow) is replaced in the core width direction by the first refrigerant replacement portion 31. At the same time, the flow of the refrigerant flowing into the second upwind heat exchange core portion 11b (hereinafter referred to as the second refrigerant flow) is replaced in the core width direction by the second refrigerant replacement portion 32. According to this, when the refrigerant evaporator 1 is viewed from the air flow direction, the liquid-phase refrigerant can be caused to flow over the entire region to be polymerized in the windward side heat exchange core part 11 and the leeward side heat exchange core part 21. . For this reason, it is possible to suppress the deterioration of refrigerant distribution.

  In particular, when the length of the core of the refrigerant evaporator 1 is long, the refrigerant flowing on one side in the width direction of the conventional refrigerant evaporator 1, that is, the leeward side heat exchange core part 21 is changed to the width of the upside heat exchange core part 11. In the refrigerant evaporator 1 configured to flow to the other side in the direction and to flow the refrigerant flowing on the other side in the width direction of the leeward heat exchange core portion 21 to one side in the width direction of the upwind heat exchange core portion 11, When the evaporator 1 is viewed from the air flow direction, there is a possibility that the liquid-phase refrigerant cannot flow over the entire polymerization site in the windward side heat exchange core part 11 and the leeward side heat exchange core part 21.

  On the other hand, as in the present embodiment, the first refrigerant flow is replaced in the core width direction by the first refrigerant replacement unit 31, and the second refrigerant flow is replaced in the core width direction by the second refrigerant replacement unit 32. Even when the core width of the refrigerant evaporator 1 is long, the liquid-phase refrigerant can be caused to flow over the entire region to be polymerized in the windward side heat exchange core part 11 and the leeward side heat exchange core part 21.

  Further, in the present embodiment, the third partition member 221 is arranged inside the first leeward tank unit 22 and the flow of the refrigerant flowing from the refrigerant introduction unit 220 is distributed to the first refrigerant flow and the second refrigerant flow. In addition, refrigerant replacement units 31 and 32 are provided for the first refrigerant flow and the second refrigerant flow, respectively. Thereby, since the refrigerant | coolant flow volume which distribute | circulates each refrigerant | coolant replacement | exchange part 31 and 32 becomes a half compared with the refrigerant | coolant replacement | exchange part of the conventional refrigerant | coolant evaporator 1, the pressure loss of a refrigerant | coolant can be reduced. Thereby, the performance of the refrigerant evaporator 1 can be improved. For this reason, even if the refrigerant | coolant replacement | exchange parts 31 and 32 are reduced in size, the performance equivalent to the conventional refrigerant evaporator 1 is securable.

  Here, FIG. 4 is explanatory drawing for demonstrating distribution of the liquid-phase refrigerant | coolant which flows through each heat exchange core part 11 and 21 of the refrigerant | coolant evaporator 1 which concerns on this 1st Embodiment.

  4A shows the distribution of the liquid phase refrigerant flowing through the leeward heat exchange core portion 21, and FIG. 4B shows the distribution of the liquid phase refrigerant flowing through the windward heat exchange core portion 11, and FIG. (C) has shown the synthesis | combination of distribution of the liquid phase refrigerant | coolant which flows through each heat exchange core part 11 and 21. FIG. 4 shows the distribution of the liquid-phase refrigerant when the refrigerant evaporator 1 is viewed from the direction of the arrow Y in FIG. 1 (the direction opposite to the flow direction Y of the blown air), and is shown by the shaded portion in the figure. A part shows the part in which a liquid phase refrigerant exists.

  First, regarding the distribution of the liquid-phase refrigerant flowing through the leeward heat exchange core portion 21, as shown in FIG. 4A, in each of the first leeward heat exchange core portion 21a and the second leeward heat exchange core portion 21b. The part where the liquid-phase refrigerant hardly flows in a part of the small core part (the second leeward side small core part 212a and the fourth leeward side small core part 212b) far from the refrigerant introduction part 220 (the white part in the figure) Will occur.

  Subsequently, as for the distribution of the liquid-phase refrigerant flowing through the windward side heat exchange core part 11, as shown in FIG. 4B, the first windward side heat exchange core part 11a and the second windward side heat exchange core part 11b, respectively. In FIG. 5, the liquid-phase refrigerant is difficult to flow in the portion excluding a part of the small core portion (the second windward small core portion 112 a and the fourth windward small core portion 112 b) far from the refrigerant lead-out portion 120 (in the drawing). White spots).

  And as shown in FIG.4 (c), when the refrigerant evaporator 1 is seen from the flow direction X of blowing air, the whole region of the superposition | polymerization site | part in the windward side heat exchange core part 11 and the leeward side heat exchange core part 21 Liquid phase refrigerant flows through

(Second Embodiment)
Next, 2nd Embodiment of this invention is described based on drawing. The second embodiment is different from the first embodiment in that only the second refrigerant flow in the first refrigerant flow and the second refrigerant flow is replaced in the core width direction.

  As shown in FIGS. 5 and 6, in the present embodiment, the first upwind heat exchange core portion 11a, the first downwind heat exchange core portion 21a, the first refrigerant distribution portion 13a, and the first refrigerant assembly portion 23a are: It is not divided in the core width direction.

  Each of the second leeward tank unit 13 and the second leeward tank unit 23 is connected via a refrigerant replacement unit 34. The refrigerant replacement unit 34 guides the refrigerant in the first refrigerant collecting unit 23a in the second leeward tank unit 23 to the first refrigerant distribution unit 13a in the second leeward tank unit 13, and further, the second leeward tank unit 23. The refrigerant in the third small collecting portion 231b in the second leeward side tank portion 13 is guided to the fourth small distributing portion 132b in the second leeward side tank portion 13, and the refrigerant in the fourth small collecting portion 232b in the second leeward side tank portion 23 is transferred to the second wind. The upper tank unit 13 is configured to guide the third small distribution unit 131b.

  That is, the refrigerant | coolant replacement | exchange part 34 is comprised so that a 2nd refrigerant | coolant flow may be replaced in the core width direction in the 2nd leeward side heat exchange core part 11b and the 2nd leeward side heat exchange core part 21b.

  Specifically, as shown in FIG. 6, the refrigerant replacement unit of the present embodiment is configured by an intermediate tank unit 34. The intermediate tank part 34 is comprised by the cylindrical member by which the both end sides were obstruct | occluded. The intermediate tank portion 34 is disposed between the second leeward tank portion 13 and the second leeward tank portion 23.

  A first partition member 341 that divides the space inside the tank into two small spaces in the core width direction is disposed at the center in the core width direction inside the intermediate tank portion 34. A second partition member 342 is disposed in a portion located on the upper side in a small space far from the refrigerant introduction portion 220 among the two small spaces of the intermediate tank portion 34. By these partitioning members 341 and 342, the space inside the tank is partitioned into a first refrigerant flow passage 34a, a second refrigerant flow passage 34b, and a third refrigerant flow passage 34c.

  The first refrigerant flow passage 34a constitutes a refrigerant flow passage that guides the refrigerant from the first refrigerant collecting portion 23a to the first refrigerant distribution portion 13a. The second refrigerant flow passage 34b constitutes a refrigerant flow passage that guides the refrigerant from the third small collecting portion 231b to the fourth small distribution portion 132b. The third refrigerant flow passage 34c constitutes a refrigerant flow path that guides the refrigerant from the fourth small collecting portion 232b to the third small distribution portion 131b.

  Here, FIG. 7 is an explanatory diagram for explaining the distribution of the liquid-phase refrigerant flowing through the heat exchange core portions 11 and 21 of the refrigerant evaporator 1 according to the second embodiment.

  FIG. 7A shows the distribution of the liquid phase refrigerant flowing through the leeward heat exchange core portion 21, and FIG. 7B shows the distribution of the liquid phase refrigerant flowing through the windward heat exchange core portion 11. (C) has shown the synthesis | combination of distribution of the liquid phase refrigerant | coolant which flows through each heat exchange core part 11 and 21. FIG. 7 shows the distribution of the liquid-phase refrigerant when the refrigerant evaporator 1 is viewed from the direction of the arrow Y in FIG. 5 (the direction opposite to the flow direction Y of the blown air), and is shown by the shaded portion in the figure. A part shows the part in which a liquid phase refrigerant exists.

  First, regarding the distribution of the liquid refrigerant flowing through the leeward heat exchange core portion 21, as shown in FIG. 7A, in the second leeward heat exchange core portion 21b, the small core on the side far from the refrigerant introduction portion 220 is used. A part (a white spot in the figure) where the liquid refrigerant hardly flows is generated in a part of the fourth leeward side small core part 212b.

  Subsequently, regarding the distribution of the liquid-phase refrigerant flowing through the windward side heat exchange core unit 11, as shown in FIG. A portion where the liquid-phase refrigerant hardly flows in a part of the third windward small core portion 111b which is the core portion and a portion of the fourth windward small core portion 112b which is the small core portion far from the refrigerant outlet portion 120 (in the drawing) White spots).

  And as shown in FIG.7 (c), when the refrigerant evaporator 1 is seen from the flow direction X of blowing air, the whole region of the superposition | polymerization site | part in the windward side heat exchange core part 11 and the leeward side heat exchange core part 21 Liquid phase refrigerant flows through

  As described above, in the present embodiment, of the first leeward side heat exchange core part 21a and the second leeward side heat exchange core part 21b, the second leeward side heat exchange core part 21b far from the refrigerant introduction part 220. Of the first windward heat exchange core portion 11a and the second windward heat exchange core portion 11b and the second windward heat exchange core portion 11b far from the refrigerant derivation portion 220, the refrigerant flow in the core width direction It is configured to be replaced with.

  Thereby, compared with the conventional refrigerant evaporator 1, that is, the refrigerant evaporator 1 configured to replace the refrigerant flow in the core width direction on the entire surface of the windward side heat exchange core portion 11 and the leeward side heat exchange core portion 21. Thus, the area of the portion where the refrigerant flow is exchanged in the core width direction is reduced. For this reason, when the refrigerant evaporator 1 is viewed from the air flow direction, polymerization is performed on the heat exchange core parts 11 and 21 on the side far from the refrigerant introduction part 220 and the refrigerant outlet part 120 having poor liquid phase distribution. The liquid phase refrigerant can surely flow through the entire area. For this reason, it is possible to reliably suppress deterioration in refrigerant distribution.

(Third embodiment)
Next, 3rd Embodiment of this invention is described based on drawing. Compared with the first embodiment, the third embodiment replaces the first refrigerant flow and the second refrigerant flow in the core width direction, and also part of the first refrigerant flow that has flowed into the second upwind tank unit 13. Is different in that it is branched so as to flow again into the leeward heat exchange core portion 21.

  As shown in FIGS. 8 and 9, the leeward heat exchange core portion 21 includes a first leeward heat exchange core portion 21a, a second leeward heat exchange core portion 21b, and a third leeward heat exchange core portion 21c. doing. The 3rd leeward side heat exchange core part 21c is arrange | positioned adjacent to the 2nd leeward side heat exchange core part 21b in the side far from the refrigerant introduction part 220 rather than the 2nd leeward side heat exchange core part 21b. In addition, the 3rd leeward side heat exchange core part 21c in this embodiment comprises the "5th core part" in a claim.

  In the present embodiment, the third leeward heat exchange core portion 21c is arranged so as to overlap (oppose) with a part of the second leeward heat exchange core portion 11b when viewed from the flow direction of the blown air. Yes.

  A partition member 223 is disposed inside the first leeward tank unit 22 on the side far from the refrigerant introduction unit 220 in the longitudinal direction. By this partition member 223, the tank internal space of the first leeward side tank portion 22 communicates with the space where the tubes 211 constituting the first leeward side heat exchange core portion 21a and the second leeward side heat exchange core portion 21b communicate with each other. The three leeward side heat exchange core portions 21c are partitioned into spaces through which the respective tubes 211 are communicated.

  Here, in the inside of the first leeward side tank portion 22, the space communicating with the respective tubes 211 constituting the first leeward side heat exchange core portion 21a and the second leeward side heat exchange core portion 21b is the first leeward side. A space that communicates with each tube 211 that constitutes the refrigerant distribution portion 22a that distributes the refrigerant to the heat exchange core portion 21a and the second leeward side heat exchange core portion 21b, and that constitutes the third leeward side heat exchange core portion 21c, The refrigerant | coolant collection part 22b which collects a refrigerant | coolant from 3 leeward side heat exchange core part 21c is comprised.

  A partition member 232 is disposed inside the second refrigerant collecting portion 23 b of the second leeward tank portion 23. The partition member 232 and the second partition member 231 allow the tank internal space of the second leeward tank portion 23 to communicate with the space where the tubes 211 constituting the first leeward heat exchange core portion 21a communicate with each other, and the second leeward heat. It is partitioned into a space in which each tube 211 constituting the exchange core portion 21b communicates and a space in which each tube 211 constituting the third leeward side heat exchange core portion 21c communicates.

  Here, in the inside of the second leeward side tank part 23, the space communicating with each tube 211 constituting the first leeward side heat exchange core part 21a collects the refrigerant from the first leeward side heat exchange core part 21a. The second refrigerant that constitutes the first refrigerant collecting portion 23a to be communicated and in which the space where the tubes 211 constituting the second leeward heat exchange core portion 21b communicate with each other collects refrigerant from the second leeward heat exchange core portion 21b. A space that constitutes the collecting portion 23b and communicates with the tubes 211 that constitute the third leeward heat exchange core portion 21c constitutes a refrigerant distribution portion 23c that distributes the refrigerant to the third leeward heat exchange core portion 21c.

  Each of the second leeward tank unit 13 and the second leeward tank unit 23 is connected via a refrigerant replacement unit 35. The refrigerant replacement unit 35 guides the refrigerant in the first refrigerant collecting unit 23 a in the second leeward tank unit 23 to the second refrigerant distribution unit 13 b in the second leeward tank unit 13 and also the second leeward tank unit 23. The refrigerant in the second refrigerant collecting portion 23b is guided to the first refrigerant distributing portion 13a in the second upwind tank portion 13. That is, the refrigerant | coolant replacement | exchange part 35 is comprised so that a refrigerant | coolant flow may be replaced in the core width direction in the 2nd leeward side heat exchange core part 11b and the 2nd leeward side heat exchange core part 21b.

  Specifically, as shown in FIG. 9, the refrigerant replacement unit of the present embodiment is configured by an intermediate tank unit 35. The intermediate tank part 35 is comprised by the cylindrical member by which the both end sides were obstruct | occluded. The intermediate tank portion 35 is disposed between the second leeward tank portion 13 and the second leeward tank portion 23.

  Inside the intermediate tank portion 34, a partition member 351 is disposed at a position located on the upper side. The partition member 351 partitions the space inside the tank into a first refrigerant flow passage 35a and a second refrigerant flow passage 35b.

  The first refrigerant flow passage 34 a constitutes a refrigerant flow passage that guides the refrigerant in the first refrigerant assembly portion 23 a in the second leeward tank portion 23 to the second refrigerant distribution portion 13 b in the second leeward tank portion 13. . The second refrigerant flow passage 34b constitutes a refrigerant flow passage that guides the refrigerant in the second refrigerant assembly portion 23b in the second leeward tank portion 23 to the first refrigerant distribution portion 13a in the second leeward tank portion 13. ing.

  A first through hole 134 is formed in the second windward tank 13 at the end on the side far from the refrigerant outlet 120 in the longitudinal direction. The first through hole 134 is provided on a surface facing the second leeward tank portion 23.

  In the second leeward tank portion 23, a second through hole 234 is formed at an end portion on the side far from the refrigerant introduction portion 220 in the longitudinal direction. The second through hole 234 is a surface facing the second upwind tank unit 13 and is provided at a site corresponding to the first through hole 134.

  The peripheral edge of the second through hole 234 is joined to the peripheral edge of the first through hole 134. For this reason, the refrigerant in the second refrigerant distribution portion 13b in the second upwind tank portion 13 passes through the first through hole 134 and the second through hole 234 to the refrigerant distribution portion 23c in the second leeward tank portion 23. Led.

  A third through hole 124 is formed in the first windward tank 12 at the end on the side far from the refrigerant outlet 120 in the longitudinal direction. The third through hole 124 is provided on the surface facing the first leeward tank unit 22.

  A fourth through hole 224 is formed in the first leeward tank portion 22 at an end portion on the side far from the refrigerant introduction portion 220 in the longitudinal direction. The fourth through hole 224 is a surface facing the first upwind tank section 12 and is provided at a site corresponding to the third through hole 124.

  The peripheral edge of the fourth through hole 224 is joined to the peripheral edge of the third through hole 124. For this reason, the refrigerant in the refrigerant distribution portion 22b in the first leeward tank portion 22 is guided to the first leeward tank portion 12 via the third through hole 124 and the fourth through hole 224.

  Next, the flow of the refrigerant in the refrigerant evaporator 1 according to this embodiment will be described.

  The low-pressure refrigerant depressurized by an expansion valve (not shown) is introduced into the tank from a refrigerant introduction part 220 formed on one end side of the first leeward tank part 22. The refrigerant introduced into the first leeward side tank unit 22 descends the first leeward side heat exchange core unit 21 a of the leeward side heat exchange core unit 21 and the second leeward side of the leeward side heat exchange core unit 21. The heat exchange core portion 21b is lowered.

  The refrigerant descending the first leeward heat exchange core portion 21 a flows into the first refrigerant collecting portion 23 a of the second leeward tank portion 23. On the other hand, the refrigerant descending the second leeward heat exchange core portion 21 b flows into the second refrigerant collecting portion 23 b of the second leeward tank portion 23.

  The refrigerant that has flowed into the first refrigerant collecting portion 23 a flows into the first refrigerant flow passage 35 a of the intermediate tank portion 35. Further, the refrigerant that has flowed into the second refrigerant assembly portion 23 b flows into the second refrigerant flow passage 35 b of the intermediate tank portion 35.

  The refrigerant that has flowed into the first refrigerant flow passage 35 a flows into the second refrigerant distribution portion 13 b of the second upwind tank portion 13. Further, the refrigerant that has flowed into the second refrigerant flow passage 35 b flows into the first refrigerant distribution portion 13 a of the second upwind tank portion 13.

  A part of the refrigerant that has flowed into the second refrigerant distribution unit 13b of the second upwind tank unit 13 ascends the second upwind heat exchange core unit 11b of the upwind heat exchange core unit 11. The remaining portion of the refrigerant that has flowed into the second refrigerant distribution portion 13b of the second upwind tank portion 13 flows into the refrigerant distribution portion 23c of the second leeward tank portion 23 via the first through hole 134 and the second through hole 234. To do.

  The refrigerant that has flowed into the refrigerant distribution part 23c of the second leeward tank part 23 rises up the third leeward heat exchange core part 21c of the leeward heat exchange core part 21, and the refrigerant collecting part of the first leeward tank part 22 It flows into 22b. The refrigerant that has flowed into the refrigerant collecting portion 22b of the first leeward tank portion 22 flows into the tank of the first leeward tank portion 12 through the third through hole 124 and the fourth through hole 224.

  On the other hand, the refrigerant that has flowed into the first refrigerant distribution unit 13 a rises in the first upwind heat exchange core unit 11 a of the upwind heat exchange core unit 11.

  The refrigerant that has risen in the second upwind heat exchange core portion 11b and the refrigerant that has risen in the first upwind heat exchange core portion 11a flow into the tank of the first upwind tank portion 12, respectively. The refrigerant that has flowed into the tank of the first upwind tank unit 12 is led out to the compressor (not shown) suction side from the refrigerant lead-out unit 120 formed on one end side of the first upwind tank unit 12.

  As described above, the refrigerant from the first leeward heat exchange core portion 21a of the leeward heat exchange core portion 21 passes through the first through-hole 134 and the second through-hole 234 and the second of the windward heat exchange core portion 11. The windward heat exchange core part 11 b and the third leeward heat exchange core part 21 c of the leeward heat exchange core part 21 are distributed. Therefore, in this embodiment, the 1st through-hole 134 and the 2nd through-hole 234 comprise the "refrigerant distribution means" as described in a claim.

  Here, FIG. 10 is an explanatory diagram for explaining the distribution of the liquid-phase refrigerant flowing through the heat exchange core portions 11 and 21 of the refrigerant evaporator 1 according to the third embodiment.

  FIG. 10A shows the distribution of the liquid phase refrigerant flowing through the leeward heat exchange core portion 21, and FIG. 10B shows the distribution of the liquid phase refrigerant flowing through the windward heat exchange core portion 11. (C) has shown the synthesis | combination of distribution of the liquid phase refrigerant | coolant which flows through each heat exchange core part 11 and 21. FIG. FIG. 10 shows the distribution of the liquid-phase refrigerant when the refrigerant evaporator 1 is viewed from the direction of the arrow Y in FIG. 8, and the portion indicated by the shaded portion in the figure shows the portion where the liquid-phase refrigerant exists. .

  First, regarding the distribution of the liquid-phase refrigerant flowing through the leeward heat exchange core portion 21, as shown in FIG. 10 (a), in the second leeward heat exchange core portion 21b, the second leeward heat exchange core portion 21b A part (a white spot in the figure) where the liquid refrigerant hardly flows is generated in a part of the side far from the refrigerant introduction part 220.

  Subsequently, as to the distribution of the liquid-phase refrigerant flowing through the windward heat exchange core unit 11, as shown in FIG. 10B, the upper side of the second windward heat exchange core unit 11b (the first windward tank unit 12). A portion where the liquid-phase refrigerant is difficult to flow (a white portion in the figure) is generated on the side close to.

  And as shown in FIG.10 (c), when the refrigerant evaporator 1 is seen from the flow direction X of blowing air, the whole region of the superposition | polymerization site | part in the windward side heat exchange core part 11 and the leeward side heat exchange core part 21 Liquid phase refrigerant flows through

  As described above, in the present embodiment, the leeward heat exchange core portion 21 is provided with the third leeward heat exchange core portion 21c facing a part of the second windward heat exchange core portion 11b in the air flow direction. While being provided, the refrigerant flowing out from the first leeward heat exchange core portion 21a is distributed to the second leeward heat exchange core portion 11b and the third leeward heat exchange core portion 21c.

  Furthermore, in the present embodiment, the first leeward side heat exchange core portion 21a, the second leeward side heat exchange core portion 21b, and the third leeward side heat exchange core portion 21c are arranged in this order from the side closer to the refrigerant introduction portion 220. ing. This makes it easier for the liquid-phase refrigerant to flow into the first leeward heat exchange core 21a, and the liquid-phase refrigerant distributed to the second leeward heat exchange core 21b and the third leeward heat exchange core 21c. The flow rate increases.

  And when the refrigerant | coolant evaporator 1 is seen from the flow direction of air by making the 3rd leeward side heat exchange core part 21c oppose a part of 2nd windward side heat exchange core part 11b in the flow direction of air. The liquid phase refrigerant is placed in the superposition part of the second windward side heat exchange core part 11b and the third leeward side heat exchange core part 21c, which is far from the refrigerant introduction part 220 and is difficult to flow in the conventional case. It can flow. For this reason, it is possible to suppress the deterioration of refrigerant distribution.

  By the way, if there is little refrigerant | coolant flow rate which flows in from the refrigerant | coolant introducing | transducing part 220, it will become difficult to flow a refrigerant | coolant to the site | part far from the refrigerant | coolant introducing | transducing part 220 in the heat exchange core parts 11 and 21. Therefore, when the refrigerant flow rate is low, it is particularly effective to adopt the configuration as in this embodiment.

(Fourth embodiment)
Next, 4th Embodiment of this invention is described based on drawing.

  As shown in FIG. 11, the refrigerant outlet 120 of the first upwind tank unit 12 is the end of the first upwind tank unit 12 opposite to the refrigerant introduction unit 220 in the longitudinal direction of the first upwind tank unit 12. Provided in the department.

  One end of a refrigerant pipe 40 through which the refrigerant flows is connected to the refrigerant introduction part 220 of the first leeward tank part 22. That is, the refrigerant outlet portion of the refrigerant pipe 40 is disposed closer to the first leeward heat exchange core portion 21a than the second leeward heat exchange core portion 21b.

  The other end of the refrigerant pipe 40 is disposed in the vicinity of the refrigerant outlet 120. That is, the refrigerant inlet part of the refrigerant pipe 40 is connected to the side closer to the second leeward heat exchange core part 21b than the first leeward heat exchange core part 21a in the leeward evaporation part 20.

  The refrigerant pipe 40 forms a refrigerant introduction channel for introducing the refrigerant into the leeward evaporation unit 20. Therefore, the refrigerant pipe 40 of the present embodiment constitutes a “refrigerant introduction flow path forming member” described in the claims.

  Each of the second leeward tank unit 13 and the second leeward tank unit 23 is connected via a refrigerant replacement unit 30. The refrigerant replacement unit 30 guides the refrigerant in the first refrigerant collecting unit 23 a in the second leeward tank unit 23 to the second refrigerant distribution unit 13 b in the second leeward tank unit 13 and also the second leeward tank unit 23. The refrigerant in the second refrigerant collecting portion 23b is guided to the first refrigerant distributing portion 13a in the second upwind tank portion 13. That is, the refrigerant replacement unit 30 is configured to replace the refrigerant flow in the core width direction in each of the heat exchange core units 11 and 21.

  Specifically, the refrigerant replacement part 30 includes a pair of collecting part connecting members 31a and 31b connected to the first and second refrigerant collecting parts 23a and 23b in the second leeward tank part 23, and a second windward tank. A pair of distributor connecting members 32a and 32b connected to the respective refrigerant distributors 13a and 13b in the portion 13, and a pair of intermediate connecting portions connected to the pair of collecting portion connecting members 31a and 31b and the pair of distributing portion connecting members 32a and 32b, respectively. And a tank portion 33.

  Each of the pair of collecting portion connecting members 31a and 31b is configured by a cylindrical member in which a refrigerant flow passage through which a refrigerant flows is formed, and one end side thereof is connected to the second leeward tank portion 23. The other end side is connected to the intermediate tank portion 33.

  The first collecting portion connecting member 31a constituting one of the pair of collecting portion connecting members 31a and 31b is connected to the second leeward tank portion 23 so that one end side thereof communicates with the first refrigerant collecting portion 23a. The other end side is connected to the intermediate tank portion 33 so as to communicate with a first refrigerant flow passage 33a in the intermediate tank portion 33 described later.

  Further, the second collecting portion connecting member 31b constituting the other is connected to the second leeward tank portion 23 so that one end side thereof communicates with the second refrigerant collecting portion 23b, and the other end side is an intermediate tank portion 33 described later. It is connected to the intermediate tank portion 33 so as to communicate with the second refrigerant flow passage 33b.

  In the present embodiment, one end side of the first collecting portion connecting member 31a is connected to a position near the partition member 231 in the first refrigerant collecting portion 23a, and one end side of the second collecting portion connecting member 31b is the second refrigerant set. The part 23b is connected to a position close to the closed end of the second leeward tank part 23.

  Each of the pair of distribution unit connecting members 32a and 32b is formed of a cylindrical member in which a refrigerant flow passage through which a refrigerant flows is formed, and one end side thereof is connected to the second upwind tank unit 13. The other end side is connected to the intermediate tank portion 33.

  Of the pair of distributor connecting members 32a and 32b, the first distributor connecting member 32a constituting one is connected to the second windward tank 13 so that one end side thereof communicates with the first refrigerant distributor 13a. The other end side is connected to the intermediate tank portion 33 so as to communicate with a second refrigerant flow passage 33b in the intermediate tank portion 33 described later. That is, the 1st distribution part connection member 32a is connected with the above-mentioned 2nd gathering part connection member 31b via the 2nd refrigerant flow passage 33b of intermediate tank part 33.

  Further, the second distribution portion connecting member 32b constituting the other is connected to the second windward tank portion 13 so that one end side communicates with the second refrigerant distribution portion 13b, and the other end side is an intermediate tank portion 33 described later. It is connected to the intermediate tank portion 33 so as to communicate with the first refrigerant flow passage 33a. In other words, the second distribution part connecting member 32 b communicates with the first collecting part connecting member 31 a described above via the first refrigerant flow passage 33 a of the intermediate tank part 33.

  The intermediate tank portion 33 is configured by a cylindrical member whose both ends are closed. The intermediate tank portion 33 is disposed between the second leeward tank portion 13 and the second leeward tank portion 23.

  A partition member 331 is disposed inside the intermediate tank portion 33 at a position located on the upper side, and the partition member 331 allows the space inside the tank to be separated from the first refrigerant flow passage 33a and the second refrigerant flow passage 33b. It is divided into.

  The 1st refrigerant | coolant flow path 33a comprises the refrigerant | coolant flow path which guide | induces the refrigerant | coolant from the 1st gathering part connection member 31a to the 2nd distribution part connection member 32b. On the other hand, the second refrigerant flow passage 33b constitutes a refrigerant flow passage that guides the refrigerant from the second collecting portion connecting member 31b to the first distribution portion connecting member 32a.

  Next, the flow of the refrigerant in the refrigerant evaporator 1 according to this embodiment will be described with reference to FIG.

  As shown in FIG. 12, the low-pressure refrigerant decompressed by the expansion valve (not shown) is formed at one end side of the first leeward tank unit 22 via the refrigerant pipe 40 as indicated by the arrow A. Is introduced into the tank. The refrigerant introduced into the first leeward tank unit 22 descends the first leeward heat exchange core portion 21a of the leeward heat exchange core portion 21 as indicated by an arrow B, and at the same time leeward heat exchange as indicated by an arrow C. The second leeward heat exchange core portion 21b of the core portion 21 is lowered.

  The refrigerant descending the first leeward heat exchange core portion 21a flows into the first refrigerant collecting portion 23a of the second leeward tank portion 23 as indicated by an arrow D. On the other hand, the refrigerant descending the second leeward heat exchange core portion 21b flows into the second refrigerant collecting portion 23b of the second leeward tank portion 23 as indicated by an arrow E.

  The refrigerant flowing into the first refrigerant collecting portion 23a flows into the first refrigerant flow passage 33a of the intermediate tank portion 33 through the first collecting portion connecting member 31a as indicated by the arrow F. Further, the refrigerant flowing into the second refrigerant collecting portion 23b flows into the second refrigerant flow passage 33b of the intermediate tank portion 33 through the second collecting portion connecting member 31b as indicated by an arrow G.

  The refrigerant flowing into the first refrigerant flow passage 33a flows into the second refrigerant distribution portion 13b of the second upwind tank portion 13 through the second distribution portion connecting member 32b as indicated by an arrow H. Further, the refrigerant flowing into the second refrigerant flow passage 33b flows into the first refrigerant distribution portion 13a of the second upwind tank portion 13 through the first distribution portion connecting member 32a as indicated by an arrow I.

  The refrigerant that has flowed into the second refrigerant distribution unit 13b of the second upwind tank unit 13 moves up the second upwind heat exchange core unit 11b of the upwind heat exchange core unit 11 as indicated by an arrow J. On the other hand, the refrigerant that has flowed into the first refrigerant distribution portion 13a rises in the first windward heat exchange core portion 11a of the windward heat exchange core portion 11 as indicated by an arrow K.

  The refrigerant that has risen up the second upwind heat exchange core portion 11b and the refrigerant that has risen up the first upwind heat exchange core portion 11a flow into the tank of the first upwind tank portion 12 as indicated by arrows L and M, respectively. As indicated by the arrow N, the refrigerant is led out to the compressor (not shown) suction side from the refrigerant lead-out portion 120 formed on one end side of the first upwind tank portion 12.

  As described above, in the present embodiment, the refrigerant outlet portion of the refrigerant pipe 40 that introduces the refrigerant into the leeward evaporator 20 is defined as the end of the leeward evaporator 20 on the first leeward heat exchange core 21a side. Connected to. Thereby, a refrigerant | coolant becomes easy to flow through the whole area of the 1st leeward side heat exchange core part 21a farther from the refrigerant | coolant derivation | leading-out part 120 among the 1st leeward side heat exchange core part 21a and the 2nd leeward side heat exchange core part 21b.

  Thus, when the refrigerant evaporator 1 is viewed from the air flow direction, the first leeward heat exchange core portion 21a and the first leeward heat exchange core portion 21a in the heat exchange core portions 11 and 21 of the leeward evaporation portion 20 and the leeward evaporation portion 10 The liquid-phase refrigerant can be caused to flow over the entire region where the one upwind heat exchange core portion 11a is polymerized. For this reason, it is possible to suppress the deterioration of refrigerant distribution.

  At this time, the refrigerant inlet part of the refrigerant pipe 40 and the refrigerant outlet part 120 are arranged in the refrigerant evaporator 1 by arranging the refrigerant inlet part of the refrigerant pipe 40 at the end part on the second leeward side heat exchange core part 21b side. Can be placed on the same side. Thereby, the manageability of the refrigerant piping connected to the refrigerant evaporator 1 can be improved.

(Fifth embodiment)
Next, a fifth embodiment of the present invention will be described with reference to the drawings.

  As shown in FIG. 13, the refrigerant evaporator 1 of the present embodiment is configured such that the flow of the refrigerant is not exchanged in the core width direction in the windward side heat exchange core part 11 and the leeward side heat exchange core part 21. Between the 2nd leeward side tank part 13 and the 2nd leeward side tank part 23, the intermediate | middle tank part 36 comprised by the cylindrical member with which the both end sides were obstruct | occluded is arrange | positioned. The intermediate tank portion 36 is joined to both the second leeward tank portion 13 and the second leeward tank portion 23.

  A plurality of leeward side through holes 235 are formed on the joint surface of the second leeward tank unit 23 with the intermediate tank unit 36. The plurality of leeward side through holes 235 are arranged side by side in the longitudinal direction of the second leeward side tank portion 23 on the joint surface. Specifically, the plurality of leeward side through holes 235 are arranged at substantially equal intervals from one end portion to the other end portion in the longitudinal direction of the second leeward tank portion 23 on the joint surface.

  A first intermediate through hole 361 is formed at a position corresponding to the leeward side through hole 235 on the joint surface of the intermediate tank unit 36 with the second leeward side tank unit 23. As a result, the second leeward tank portion 23 and the intermediate tank portion 36 communicate with each other via the leeward through hole 235 and the first intermediate through hole 361.

  One windward through hole 135 is formed on the joint surface of the second windward tank 13 with the intermediate tank 36. The windward side through-hole 135 is disposed at the end of the joint surface opposite to the refrigerant outlet 120 in the stacking direction of the tubes 111 constituting the windward heat exchange core part 11.

  A second intermediate through hole 362 is formed at a position corresponding to the windward through hole 135 on the joint surface of the intermediate tank unit 36 with the second windward tank unit 13. Thus, the second upwind tank unit 13 and the intermediate tank unit 36 communicate with each other via the upwind through hole 135 and the second intermediate through hole 362.

  Due to the intermediate tank portion 36 configured as described above, the leeward evaporation unit 20 and the leeward evaporation unit 10 use the refrigerant flowing out of the leeward evaporation unit 20 as refrigerant in the stacking direction of the tubes 111 in the leeward evaporation unit 10. It can be led to the end side opposite to the lead-out portion 120. Therefore, the intermediate tank portion 36 constitutes a “communication portion” described in the claims.

  As described above, in the present embodiment, the refrigerant for deriving the refrigerant from the inside of the windward side evaporation unit 10 to the same end side as the refrigerant introduction unit 220 in the stacking direction of the tubes 111 in the windward side evaporation unit 10. A derivation unit 120 is provided. Thereby, the manageability of the refrigerant piping connected to the refrigerant evaporator 1 can be improved.

  However, when the refrigerant evaporator 1 is viewed from the air flow direction, the far side from the refrigerant introduction part 220 in the heat exchange core parts 11 and 21 of the leeward evaporation part 20 and the windward evaporation part 10, that is, the refrigerant outlet part. On the side far from 120, there is a portion where the liquid refrigerant is difficult to flow, and the temperature distribution may be deteriorated.

  On the other hand, in the present embodiment, the refrigerant that has flowed out of the leeward evaporation unit 20 and the leeward evaporation unit 20 from the leeward evaporation unit 20 is used as the refrigerant derivation unit 120 in the stacking direction of the tubes 111 in the upwind evaporation unit 10. It connects via the intermediate tank part 36 led to the edge part side on the opposite side. Thereby, a liquid phase refrigerant | coolant becomes easy to flow to the side far from the refrigerant | coolant derivation | leading-out part 120 in the windward heat exchange core part 11. FIG.

  Therefore, when the refrigerant evaporator 1 is viewed from the air flow direction, the liquid-phase refrigerant can be caused to flow over the entire region of the leeward heat exchange core portion 21 and the windward heat exchange core portion 11 to be polymerized. At this time, since it is not necessary to provide the intermediate tank part 36 with a partition member for partitioning the tank internal space, it is possible to suppress deterioration in refrigerant distribution with a simple configuration.

  Here, FIG. 14 is an explanatory diagram for explaining the distribution of the liquid-phase refrigerant flowing through the heat exchange core portions 11 and 21 of the refrigerant evaporator 1 according to the fifth embodiment.

  14A shows the distribution of the liquid-phase refrigerant flowing through the leeward heat exchange core portion 21, and FIG. 14B shows the distribution of the liquid-phase refrigerant flowing through the leeward heat exchange core portion 11, and FIG. (C) has shown the synthesis | combination of distribution of the liquid phase refrigerant | coolant which flows through each heat exchange core part 11 and 21. FIG. FIG. 14 shows the distribution of the liquid-phase refrigerant when the refrigerant evaporator 1 is viewed from the direction of arrow Y in FIG. 13, and the portion indicated by the shaded portion in the figure indicates the portion where the liquid-phase refrigerant exists. .

  First, regarding the distribution of the liquid-phase refrigerant flowing through the leeward heat exchange core portion 21, as shown in FIG. 14 (a), the refrigerant introduction of the leeward heat exchange core portion 21 in the second leeward heat exchange core portion 21b. A part (a white spot in the figure) where the liquid refrigerant hardly flows is generated in a part of the side far from the portion 220.

  Subsequently, as for the distribution of the liquid-phase refrigerant flowing through the windward heat exchange core unit 11, as shown in FIG. 14B, the liquid phase refrigerant is concentrated on the far side from the refrigerant derivation unit 120 of the windward heat exchange core unit 11. The phase refrigerant flows, and a portion where the liquid phase refrigerant is difficult to flow (a white portion in the figure) is generated in other portions.

  And as shown in FIG.14 (c), when the refrigerant evaporator 1 is seen from the flow direction X of blowing air, the whole region of the superposition | polymerization site | part in the windward side heat exchange core part 11 and the leeward side heat exchange core part 21 Liquid phase refrigerant flows through

(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 the above-described embodiment, as the refrigerant evaporator 1, the first windward side heat exchange core portion 11 a and the first leeward side heat exchange core portion 21 a are superposed when viewed from the flow direction of the blown air. Although the example arrange | positioned so that it may arrange | position and the 2nd leeward side heat exchange core part 11b and the 2nd leeward side heat exchange core part 21b superpose | polymerize was demonstrated, it is not restricted to this. The refrigerant evaporator 1 is arranged so that at least a part of the first windward heat exchange core portion 11a and the first leeward heat exchange core portion 21a are polymerized when viewed from the flow direction of the blown air, You may arrange | position so that at least one part of the 2nd leeward side heat exchange core part 11b and the 2nd leeward side heat exchange core part 21b may superpose | polymerize.

  (2) Although it is desirable to arrange the windward-side evaporator 10 in the refrigerant evaporator 1 on the upstream side in the flow direction X of the blown air as compared with the above-described embodiment, You may make it arrange | position the windward evaporation part 10 in the downstream in the flow direction X of blowing air rather than the leeward evaporation part 20. FIG.

  (3) In the above-described embodiment, the example in which each heat exchange core portion 11 and 21 is configured by the plurality of tubes 111 and 211 and the fins 112 and 212 has been described. The heat exchange core parts 11 and 21 may be configured as described above. Moreover, when each heat exchange core part 11 and 21 is comprised with the some tubes 111 and 211 and the fins 112 and 212, the fins 112 and 212 may employ | adopt a plate fin not only a corrugated fin.

  (4) In the above-described embodiment, the example in which the refrigerant evaporator 1 is applied to the refrigeration cycle of the vehicle air conditioner has been described. However, the present invention is not limited to this example. Good.

11 Upwind heat exchange core (heat exchange core)
11a 1st upwind heat exchange core part (3rd core part)
11b 2nd windward heat exchange core part (4th core part)
21 Downward heat exchange core (heat exchange core)
21a 1st leeward side heat exchange core part (1st core part)
21b 2nd leeward side heat exchange core part (2nd core part)
111b 3rd windward small core part (3rd small core part)
112b 4th windward small core part (4th small core part)
211b 3rd leeward side small core part (1st small core part)
212b 4th leeward side small core part (2nd small core part)

Claims (2)

A refrigerant evaporator that exchanges heat between a cooled fluid flowing outside and a refrigerant,
A first evaporator (20) and a second evaporator (10) arranged in series with respect to the flow direction of the fluid to be cooled;
Each of the first evaporator (20) and the second evaporator (10) has a heat exchange core (11, 21) configured by stacking a plurality of tubes (111, 211) through which a refrigerant flows. ,
The heat exchange core part (21) in the first evaporation part (20) includes a first core part (21a) constituted by a part of a tube group among the plurality of tubes (211), and another one. A second core part (21b) composed of a group of tubes,
The heat exchange core part (11) in the second evaporation part (10) includes at least a part of the first core part (21a) in the flow direction of the fluid to be cooled among the plurality of tubes (111). A third core portion (11a) composed of opposing tube groups, and a fourth core portion composed of a tube group facing at least part of the second core portion (21b) in the flow direction of the fluid to be cooled. (11b)
The first evaporation section (20) and the second evaporation section (10) are configured such that the refrigerant from the first core section (21a) is guided to the fourth core section (11b) and the second core section ( The refrigerant from 21b) is led to the third core part (11a),
The first evaporation part (20) is provided with a refrigerant introduction part (220) for introducing a refrigerant into the first evaporation part (20).
The heat exchange core part (21) in the first evaporation part (20) is a tube belonging to the first core part (21a) and the second core part (21b) among the plurality of tubes (211) ( 211) having a fifth core portion (21c) composed of a tube group other than
The first core part (21a), the second core part (21b), and the fifth core part (21c) are formed from the first core part (21a), the second core part (21c) from the side close to the refrigerant introduction part (220). 2 core portions (21b) and the fifth core portion (21c) are arranged in this order,
The fifth core part (21c) faces at least a part of the fourth core part (11b) in the flow direction of the fluid to be cooled,
Furthermore, the refrigerant | coolant distribution means (134,234) which distributes the refrigerant | coolant which flowed out from the said 1st core part (21a) to the said 4th core part (11b) and the said 5th core part (21c) is provided. Refrigerant evaporator. A refrigerant evaporator that exchanges heat between a cooled fluid flowing outside and a refrigerant,
A first evaporator (20) and a second evaporator (10) arranged in series with respect to the flow direction of the fluid to be cooled;
Each of the first evaporator (20) and the second evaporator (10) has a heat exchange core (11, 21) configured by stacking a plurality of tubes (111, 211) through which a refrigerant flows. ,
The heat exchange core part (21) in the first evaporation part (20) includes a first core part (21a) constituted by a part of a tube group among the plurality of tubes (211), and a remaining tube. Having a second core portion (21b) composed of a group;
The heat exchange core part (11) in the second evaporation part (10) includes at least a part of the first core part (21a) in the flow direction of the fluid to be cooled among the plurality of tubes (111). A third core portion (11a) composed of opposing tube groups, and a fourth core portion composed of a tube group facing at least part of the second core portion (21b) in the flow direction of the fluid to be cooled. (11b)
The first evaporation section (20) and the second evaporation section (10) are configured such that the refrigerant from the first core section (21a) is guided to the fourth core section (11b) and the second core section ( The refrigerant from 21b) is led to the third core part (11a),
In order to extract the refrigerant from the inside of the second evaporation section (10) closer to the fourth core section (11b) than the third core section (11a) in the second evaporation section (10). The refrigerant outlet part (120) is provided,
A refrigerant introduction flow path forming member (40) that forms a refrigerant introduction flow path for introducing the refrigerant into the first evaporation section (20) is connected to the first evaporation section (20),
A refrigerant outlet portion of the refrigerant introduction flow path forming member (40) is connected to a side closer to the first core portion (21a) than the second core portion (21b) in the first evaporation portion (20). And
The refrigerant inlet section of the refrigerant introduction flow path forming member (40) is disposed closer to the second core section (21b) than the first core section (21a). .

Images