JP2020100255A - Condenser and air conditioner for vehicle - Google Patents

Abstract

To suppress accumulation of oil in an indoor condenser having a lateral flow structure.SOLUTION: In a condenser 16, a flow of a heat medium flowing from one header 41 through a plurality of tubes 42 toward the other header 41 is regarded as one path. In the condenser, one-path structures 51A and 51B formed with only one path are provided. A discharge port 45 of a final path, in which a first path formed on the one one-path structure 51A so that the one-path structures 51A and 51B are overlapped with one another in a ventilation direction, and a second path formed on the other one-path structure 51B are connected to each other so that the heat medium sequentially passes therethrough, is provided on the downstream side of the center in a vertical direction in the final path.SELECTED DRAWING: Figure 4

Description

The present invention relates to a condenser and a vehicle air conditioner.

As shown in Patent Document 1, an indoor condenser used in a heat pump system for a vehicle generally has a vertical flow structure in which a header extends laterally and a tube extends vertically.

JP, 2013-204825, A

Some designs require a cross flow structure with the header extending vertically and the tube extending laterally. For example, a heater may be provided on the leeward side of the condenser, and a heat sink for cooling the electronic circuit thereof may be arranged on the leeward side of the lower side portion of the condenser. In order to improve the cooling efficiency, it is desirable to supply the air to the heat sink, but in the case of the vertical flow structure, the header is arranged on the lower side of the condenser, so that the header hinders ventilation to the heat sink. Therefore, in order to allow ventilation at the lower side of the condenser, a cross-flow structure may be required.
In the case of the lateral flow structure, since the height difference occurs in the header, oil is likely to be accumulated in the lower part, which is particularly noticeable in an operating condition where condensation does not occur such as cooling.
An object of the present invention is to suppress oil retention in a cross flow structure.

A condenser according to one aspect of the present invention,
A condenser provided in a supply flow path for supplying air to a vehicle interior, performing heat exchange between air passing through the surroundings and a heat medium passing through the inside, and radiating heat to the heat medium,
A pair of headers extending in the vertical direction and provided at intervals in the horizontal direction,
A plurality of tubes extending in the lateral direction, one end and the other end of which are connected to the header, and a plurality of tubes provided at intervals in the vertical direction,
The flow of heat medium flowing from one header to the other header through multiple tubes is regarded as one path,
The outlet of the final pass is provided below the vertical center of the final pass.

According to the present invention, since the discharge port of the final pass is provided on the lower side, the oil is easily discharged, and the retention of the oil can be suppressed.

It is a figure showing the air harmony device for vehicles of one embodiment. It is a figure which shows heating operation. It is a figure which shows cooling operation. It is a figure which shows the condenser of a two-pass structure. It is a figure which shows the flow of the heat medium in a two-pass structure typically. It is a figure which shows a port block. It is a figure which shows the condenser of a four-pass structure. It is a figure which shows typically the flow of the heat medium in a four-pass structure. It is a figure which shows a condenser and a heater. FIG. 7 shows a condenser with a fourth pass arranged above. It is a figure which shows typically the flow of the heat medium which has arrange|positioned the 4th pass upwards.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The drawings are schematic and may differ from the actual ones. Further, the following embodiments exemplify devices and methods for embodying the technical idea of the present invention, and the configurations are not limited to the following. That is, the technical idea of the present invention can be modified in various ways within the technical scope described in the claims.

<< one embodiment >>
"Constitution"
FIG. 1 is a diagram showing a vehicle air conditioner of an embodiment.
The vehicle air conditioner 11 includes a heat pump system mounted on an automobile, and includes an indoor heat exchange unit 12 (supply channel) provided on the passenger compartment side and a heat exchanger 13 provided outside the passenger compartment. Prepare The vehicle interior side and the vehicle exterior side are separated by, for example, a dash panel.
The indoor heat exchange unit 12 is arranged inside the dashboard, and is formed by a duct that introduces the outside air or the inside air from one end side and supplies the air into the vehicle interior from the other end side. The indoor heat exchange unit 12 is also called HVAC (Heating Ventilation and Air Conditioning). A blower fan 14, an evaporator 15, a condenser 16, an air mix damper 17, and a heater 18 are provided inside the indoor heat exchange unit 12.

The blower fan 14 is provided on one end side of the indoor heat exchange unit 12, and when driven by a motor, sucks outside air or inside air and discharges it to the other end side.
The evaporator 15 is provided on the downstream side of the blower fan 14, and serves as a heat absorber and a dehumidifier between the air passing around the radiation fins and the low-temperature heat medium (refrigerant) passing inside the tube. Heat exchange. That is, by evaporating and evaporating the heat medium in the tube, the air around the radiating fins is cooled, and dew condensation is caused on the surface of the radiating fins to dehumidify. All the air blown out from the blower fan 14 passes through the evaporator 15.

The condenser 16 is provided on the downstream side of the evaporator 15, and serves as a radiator to exchange heat between the air passing around the radiation fins and the high-temperature heat medium (heat medium) passing through the tube. Do. That is, by condensing and liquefying the heat medium in the tube, the air around the radiating fins is heated. The condenser 16 is arranged so as to close approximately half of the cross section of the indoor heat exchange unit 12, so that a passage that passes through the condenser 16 and a passage that bypasses the condenser 16 are formed. ing. That is, a part of the air that has passed through the evaporator 15 passes through the condenser 16 and the rest bypasses the condenser 16.

The air mix damper 17 opens the flow path that passes through the condenser 16 and closes the flow path that bypasses the condenser 16, and closes the flow path that passes through the condenser 16 and bypasses the condenser 16. It is rotatable between the position where the flow path is opened and the position where it is opened. When the air mix damper 17 is located at a position where the flow passage that passes through the condenser 16 is opened and the flow passage that bypasses the condenser 16 is closed, all the air that has passed through the evaporator 15 passes through the condenser 16. When the air mix damper 17 is located at the position where it closes the flow path that passes through the condenser 16 and opens the flow path that bypasses the condenser 16, all air that has passed through the evaporator 15 bypasses the condenser 16. When the air mix damper 17 is in a position to open both the flow path passing through the condenser 16 and the flow path bypassing the condenser 16, a part of the air passing through the evaporator 15 passes through the condenser 16. However, the rest bypasses the condenser 16. Then, on the downstream side of the condenser 16, the air passing through the condenser 16 and the air bypassing the condenser 16 are mixed.
The heater 18 is, for example, a PTC heater (PTC: Positive Temperature Coefficient) whose resistance value changes according to temperature, is provided on the leeward side of the condenser 16, and all the air that has passed through the condenser 16 passes through the heater 18. The heater 18 can be switched ON/OFF, and warms the air passing therethrough when it is ON.

The heat exchanger 13 is provided in the engine room or the motor room, and performs heat exchange between the outside air passing around the radiation fins and the heat medium passing inside the tube. The outside air is mainly a traveling wind, but when a sufficient traveling wind is not obtained, a blower (not shown) is driven to blow the outside air to the radiating fins.
When the operation mode is heating, the heat exchanger 13 is caused to function as an evaporator, that is, a heat absorber, and heat is exchanged between the outside air passing around the radiation fins and the low-temperature heat medium (refrigerant) passing inside the tube. Do. That is, the heat medium in the tube is vaporized and evaporated to absorb heat.
When the operation mode is cooling, the heat exchanger 13 functions as a condenser, that is, a radiator, and heat is exchanged between the outside air passing around the radiation fins and the high-temperature heat medium (heat medium) passing through the tube. Exchange. That is, the heat medium in the tube is condensed and liquefied to release heat.

Next, the circuit configuration of the heat medium will be described.
The outlet of the condenser 16 communicates with the inlet of the heat exchanger 13 via the flow path 21. An expansion valve 31 is provided in the flow path 21.
The expansion valve 31 reduces the pressure of the low-pressure heat medium that is easily vaporized by blowing out the high-pressure heat medium that is the liquid phase into a mist, and the opening degree can be adjusted from fully closed to fully open.
The outlet of the heat exchanger 13 communicates with the inlet of the condenser 16 via the flow path 22. An opening/closing valve 32, a check valve 33, an accumulator 34, and a compressor 35 are sequentially provided in the flow path 22 from the heat exchanger 13 side toward the condenser 16 side.

The opening/closing valve 32 opens or closes the flow path 22.
The check valve 33 allows passage from the opening/closing valve 32 side to the accumulator 34 side and prevents passage in the reverse direction.
The accumulator 34 performs gas-liquid separation of the heat medium and supplies only the gas-phase heat medium to the compressor 35.
The compressor 35 compresses a low-pressure heat medium in a gas phase to increase the pressure to a high-pressure heat medium that is easily liquefied, and is a refueling type in which lubrication is performed by oil circulating with the heat medium. For example, it is a rotary compressor, a swash plate compressor, a scroll compressor, or the like. The oil concentration with respect to the heat medium is about several percent. The drive source of the compressor 35 is an engine or an electric motor.

In the flow path 21, there is a branch point between the heat exchanger 13 and the expansion valve 31, and this branch point communicates with the inlet of the evaporator 15 via the flow path 23. The flow path 23 is provided with an opening/closing valve 36 and an expansion valve 37 in this order from the branch point side toward the evaporator 15 side.
The open/close valve 36 opens or closes the flow path 23.
The expansion valve 37 decompresses a high-pressure heat medium that is a liquid phase into a mist and blows it out to reduce the pressure to a low-pressure heat medium that is easily vaporized, and its opening can be adjusted from fully closed to fully open.

In the flow path 22, there is a branch point between the heat exchanger 13 and the open/close valve 32, and in the flow path 23, there is a branch point between the open/close valve 36 and the expansion valve 37. The points communicate with each other via the flow path 24. A check valve 38 is provided in the flow path 24.
The check valve 38 allows passage from the side of the flow path 22 to the side of the flow path 23 and blocks passage in the reverse direction.
In the flow path 22, there is a branch point between the on-off valve 32 and the check valve 33, and this branch point communicates with the outlet of the evaporator 15 via the flow path 25.

Next, each operation mode will be described.
[Heating operation]
FIG. 2 is a diagram showing a heating operation.
In the figure, the flow path through which the low-pressure heat medium passes is indicated by a thick dotted line, the flow path through which the high-pressure heat medium passes is indicated by a thick solid line, the opened on-off valve is indicated by white, and the closed on-off valve is indicated. It is shown in black.
When the operation mode is heating, the expansion valve 31 is slightly opened, the opening/closing valve 32 is opened, the opening/closing valve 36 is closed, and the expansion valve 37 is closed, and the compressor 35 is driven.

As a result, the heat medium circulates via the compressor 35, the condenser 16, the expansion valve 31, the heat exchanger 13, the opening/closing valve 32, the check valve 33, and the accumulator 34 in order. In this circulation path, the heat medium in the gas phase is compressed by the compressor 35 to have a high pressure, is condensed and liquefied in the condenser 16 and is cooled to a low temperature. The heat medium in the liquid phase is expanded by the expansion valve 31 to a low pressure, evaporated and vaporized in the heat exchanger 13, and becomes high temperature by absorbing heat.
On the other hand, in the indoor heat exchange unit 12, the blower fan 14 is driven, and the air mix damper 17 opens the flow path that passes through the condenser 16. As a result, the introduced air is heated by the condenser 16, and warm air is supplied into the vehicle interior. When the heater 18 is driven, it is further heated.

[Cooling operation]
FIG. 3 is a diagram showing a cooling operation.
In the figure, the flow path through which the low-pressure heat medium passes is indicated by a thick dotted line, the flow path through which the high-pressure heat medium passes is indicated by a thick solid line, the opened on-off valve is indicated by white, and the closed on-off valve is indicated. It is shown in black.
When the operation mode is cooling, the expansion valve 31 is fully opened, the opening/closing valve 32 is closed, the opening/closing valve 36 is closed, and the expansion valve 37 is slightly opened, and the compressor 35 is driven.

Accordingly, the heat medium passes through the compressor 35, the condenser 16, the expansion valve 31, the heat exchanger 13, the check valve 38, the expansion valve 37, the evaporator 15, the check valve 33, and the accumulator 34 in order. Circulate. In this circulation path, the heat medium in the gas phase is compressed by the compressor 35 to have a high pressure, is condensed and liquefied in the condenser 16 and is cooled to a low temperature. The heat medium which is being liquefied is further condensed and liquefied in the heat exchanger 13, and is further cooled by heat radiation. The heat medium in the liquid phase is expanded by the expansion valve 37 to have a low pressure, is vaporized in the evaporator 15, and becomes high temperature by absorbing heat.
On the other hand, in the indoor heat exchange unit 12, the blower fan 14 is driven, and the air mix damper 17 closes the flow path passing through the condenser 16. As a result, after the introduced air is cooled and dehumidified by the evaporator 15, it bypasses the condenser 16 and the dehumidified cool air is supplied into the vehicle interior.

Next, the condenser 16 will be described.
First, the condenser 16 having a two-pass structure (one-pass structure×2) will be described.
FIG. 4 is a diagram showing a two-pass condenser.
(A) in the figure is a view of the condenser 16 seen from above, and (b) in the figure is a view of the condenser 16 seen from the windward side. The condenser 16 includes a pair of headers 41, a plurality of tubes 42, a plurality of fins 43, an inlet 44, and an outlet 45.
The pair of headers 41 extend in the vertical direction and are provided at intervals in the horizontal direction. The header 41 is formed by a cylindrical pipe whose both ends are closed.
Each of the tubes 42 extends in the lateral direction, one end and the other end thereof are connected to the header 41, and are provided at equal intervals in the vertical direction. The tube 42 has a flat shape that is thin in the vertical direction, and has both ends connected to the inside of the header 41 and is brazed to the header 41. Here, as an example, the case where there are 20 pieces is shown.

Each fin 43 is fixed by brazing between adjacent tubes 42. Here, although only a part is shown, it is assumed that it is provided over the entire space between the adjacent tubes 42.
In the condenser 16, the flow of the heat medium flowing from the one header 41 to the other header 41 through the plurality of tubes 42 is one path. Here, two one-path structures 51 each having only one path are provided. The one-pass structures 51 are overlapped with each other in the ventilation direction, and the heat medium sequentially passes through a first pass P1 formed in one one-pass structure 51A and a second pass P2 formed in the other one-pass structure 51B. Are connected (see FIG. 5). That is, in the header 41 on the side where the introduction port 44 is not connected in the one-pass structure 51A and the header 41 on the side where the discharge port 45 is not connected in the one-pass structure 51B, the cylindrical surfaces facing each other form the connecting plate 46. Connected through. The connecting plate 46 and the cylindrical surface to which the connecting plate 46 is connected respectively have communication passages (not shown) formed therein, and the heat medium can pass through these communication passages.

The inlet 44 and the outlet 45 are formed in a common port block 47. The port blocks 47 are connected to the respective headers 41 from one side in the horizontal direction. The inlet 44 communicates with the header 41 of the one-pass structure 51A, and the outlet 45 communicates with the header 41 of the one-pass structure 51B. The axis of the inlet 44 and the axis of the outlet 45 are oriented in the lateral direction, as an example.
FIG. 5 is a diagram schematically showing the flow of the heat medium in the two-pass structure.
The heat medium introduced through the inlet 44 is discharged from the outlet 45 through the first path P1 formed in the one-pass structure 51A and the second path P2 formed in the one-pass structure 51B in order. .. The heat medium exchanges heat with the air flowing around the tubes 42 and the fins 43 when flowing through the first path P1 and the second path P2.
The discharge port 45 is provided below the vertical center of the second pass P2, which is the final pass. Here, as an example, the discharge port 45 is provided at the lower end of the second path P2.

FIG. 6 is a diagram showing a port block.
The inner diameter of the inlet 44 and the inner diameter of the outlet 45 are close to the outer diameter of the header 41, respectively. Therefore, if the inlet 44 and the outlet 45 are arranged at the same height, they will interfere with each other or the wall thickness on the outer side in the radial direction will be insufficient. Therefore, the inlets 44 and the outlets 45 are arranged with their heights shifted. (A) in the figure shows a case where the discharge port 45 is arranged below the introduction port 44. (B) in the figure shows a case where the discharge port 45 is arranged above the introduction port 44.

Next, the condenser 16 having a four-pass structure (two-pass structure×2) will be described.
The same parts as those of the condenser 16 having the two-pass structure are designated by the same reference numerals, and detailed description thereof will be omitted.
FIG. 7 is a diagram showing a condenser having a four-pass structure.
(A) in the figure is a view of the condenser 16 seen from above, and (b) in the figure is a view of the condenser 16 seen from the windward side.
Here, two two-pass structures 52 are provided in which two paths are formed side by side in the vertical direction, and one path and the other path are connected so that the heat medium passes in order. The two-pass structures 52 are overlapped with each other in the ventilation direction, and the first pass P1 and the second pass P2 formed in one two-pass structure 52A, and the third pass P3 and the fourth formed in the other two-pass structure 52A. The path P4 is connected so that the heat medium passes in order (see FIG. 8). The second path P2 is arranged above the first path P1, and the fourth path P4 is arranged below the third path P3.

That is, the inside of the header 41 on the side to which the introduction port 44 is connected in the two-pass structure 52A is partitioned by the partition wall 48, the lower side is the header 41A, and the upper side is the header 41C. Here, as an example, there is shown a case where there are 13 tubes 42 below the partition wall 48 and 7 tubes 42 above the partition wall 48. The side of the two-pass structure 52A to which the introduction port 44 is not connected is referred to as a header 41B. The inside of the header 41 on the side to which the discharge port 45 is connected in the two-pass structure 52B is partitioned by a partition wall 48, and the upper side is a header 41D and the lower side is a header 41F. The side of the two-pass structure 52B to which the discharge port 45 is not connected is referred to as a header 41E. Here, as an example, a case is shown in which there are seven tubes 42 above the partition wall 48 and 13 tubes 42 below the partition wall 48. The header 41C of the two-pass structure 52A and the header 41D of the two-pass structure 52B are connected to each other through their connecting plates 46 at opposite cylindrical surfaces. The connecting plate 46 and the cylindrical surface to which the connecting plate 46 is connected respectively have communication passages (not shown) formed therein, and the heat medium can pass through these communication passages.

The inlet 44 communicates with the header 41A of the two-pass structure 52A, and the outlet 45 communicates with the header 41F of the two-pass structure 52B.
FIG. 8 is a diagram schematically showing the flow of the heat medium in the four-pass structure.
The heat medium is introduced from the introduction port 44 and sequentially passes through the first pass P1 and the second pass P2 formed in the two-pass structure 52A, and the third pass P3 and the fourth pass P4 formed in the two-pass structure 52B. And is discharged from the discharge port 45. The heat medium exchanges heat with the air flowing around the tubes 42 and the fins 43 when flowing through the first path P1, the second path P2, the third path P3, and the fourth path P4.
The discharge port 45 is provided below the vertical center of the fourth pass P4, which is the final pass. Here, as an example, the discharge port 45 is provided at the lower end of the fourth pass P4.

《Action》
Next, the main effects of one embodiment will be described.
FIG. 9 is a diagram showing a condenser and a heater.
A heater 18 is provided on the leeward side of the condenser 16, and a heat sink 18 a (object) for cooling the electronic circuit thereof is arranged on the leeward side of the lower side portion of the condenser 16. In order to improve the cooling efficiency, it is necessary to supply air to the heat sink 18a. However, in the case of the vertical flow structure in which the header extends in the horizontal direction and the tube extends in the vertical direction, the header is arranged on the lower side of the condenser 16, so that the header hinders ventilation to the heat sink 18a. On the other hand, if the header 41 has a lateral flow structure in which the header 41 extends in the vertical direction and the tube 42 extends in the lateral direction, ventilation is not obstructed at the lower side of the condenser 16. Therefore, even when the heater 18 is being operated, it is possible to supply air to the heat sink 18a of the electronic circuit and improve the cooling efficiency.

However, in the case of the lateral flow structure, since the height difference occurs in the header 41, oil is likely to be accumulated in the lower part, which is remarkable especially in an operating condition where condensation does not occur such as cooling.
Further, when a height difference occurs in the header 41, a larger amount of the gas phase heat medium flows through the upper tube 42 than the lower tube 42, and the lower tube 42 is liquefied as compared with the upper tube 42. A large amount of heat medium flows. The temperature of the heat medium in the gas phase does not easily change even when heat is exchanged, and it is possible to maintain a high temperature, but the temperature of the liquefied heat medium decreases due to the heat exchange. Therefore, the upper side of the condenser 16 has a high temperature and the lower side has a low temperature, which causes a temperature difference in the vertical direction.

Therefore, the discharge port 45 of the final pass is provided below the vertical center of the final pass. That is, in the case of the two-pass structure, the discharge port 45 is provided below the second pass P2, and in the case of the four-pass structure, the discharge port 45 is provided below the fourth pass P4. As a result, the oil is easily discharged, and it is possible to suppress the oil from staying. Therefore, it is possible to avoid a situation where the compressor 35 runs out of oil and improve reliability.
Further, in the upper tube 42, the heat medium must first move up the header 41, so that the pressure loss is large, so that the flow rate of the heat medium is smaller than that in the lower tube 42. On the other hand, in the lower tube 42, the heat medium does not have to move up the header 41, so the flow rate of the heat medium increases as compared with the upper tube 42 because the pressure loss is small. Due to this flow rate difference, the temperature difference in the vertical direction can be suppressed. Therefore, the effective condensing area is expanded, and the heating performance is improved.

In the case of the four-pass structure, the fourth pass P4 is arranged below the third pass P3. This makes it easier for the oil to be discharged, and it is possible to suppress the accumulation of oil.
Further, the introduction port 44 and the discharge port 45 are formed in the common port block 47. As a result, the number of parts can be reduced and the workability can be improved as compared with the case where each of the introduction port 44 and the discharge port 45 is formed in different port blocks 47.
Furthermore, since the condenser 16 has a lateral flow structure and the port block 47 is provided on one side in the lateral direction, when the indoor heat exchange unit 12 is assembled from the lateral direction, it is easy to seal and the workability is improved. ..

<Modification>
In the present embodiment, in the case of the four-pass structure, the fourth pass P4 is arranged below the third pass P3, but the present invention is not limited to this. That is, the fourth path P4 may be arranged on the third path P3.
FIG. 10 shows the condenser with the fourth pass arranged above.
FIG. 11: is a figure which shows typically the flow of the heat medium which has arrange|positioned the 4th pass upwards.
The header 41 on the side to which the introduction port 44 is connected in the two-pass structure 52A is partitioned by a partition wall 48, the upper side is the header 41A, and the lower side is the header 41C. The inside of the header 41 on the side to which the discharge port 45 is connected in the two-pass structure 52B is partitioned by the partition wall 48, the lower side is the header 41D, and the upper side is the header 41F. The header 41C of the two-pass structure 52A and the header 41D of the two-pass structure 52B are connected to each other through their connecting plates 46 at their opposing cylindrical surfaces.
Although the fourth pass P4 is arranged above the third pass P3, by providing the discharge port 45 on the lower side of the fourth pass P4, the above-described effects can be obtained.

In the present embodiment, the axis of the discharge port 45 is in the lateral direction, but the present invention is not limited to this, and it may be in the vertical direction.
In the present embodiment, the discharge port 45 is provided at the lower end of the final pass, but the present invention is not limited to this. It may be provided at any height as long as it is below the center in the vertical direction in the final pass.
In the present embodiment, the one-pass structure 51A is on the leeward side and the one-pass structure 51B is on the leeward side, but the present invention is not limited to this, and the one-pass structure 51A is on the leeward side and the one-pass structure 51B is on the leeward side. May be on the side. The same applies to the two-pass structure 52A and the two-pass structure 52B.

In the present embodiment, the introduction port 44 and the discharge port 45 are formed in the common port block 47, but the present invention is not limited to this, and each may be formed in different port blocks 47.
In the present embodiment, the introduction port 44 and the discharge port 45 are formed with the heights shifted, but the present invention is not limited to this. If the inner diameter of the inlet 44 and the inner diameter of the outlet 45 are sufficiently smaller than the outer diameter of the header 41, the inlet 44 and the outlet 45 may have the same height.
In the present embodiment, the axis of the introduction port 44 is in the horizontal direction, but the present invention is not limited to this, and it may be in the vertical direction.
In the present embodiment, the introduction port 44 is provided at the lower end of the first path P1, but the present invention is not limited to this. It may be provided at any position as long as it can communicate with the first path P1.

Although the above description has been made with reference to a limited number of embodiments, the scope of rights is not limited thereto, and modifications of the embodiments based on the above disclosure will be obvious to those skilled in the art.

11... Vehicle air conditioner, 12... Indoor heat exchange unit, 13... Heat exchanger, 14... Blower fan, 15... Evaporator, 16... Condenser, 17... Air mix damper, 18... Heater, 18a... Heat sink, 21... Flow path, 22... Flow path, 23... Flow path, 24... Flow path, 25... Flow path, 31... Expansion valve, 32... Open/close valve, 33... Check valve, 34... Accumulator, 35... Compressor, 36... On-off valve, 37... Expansion valve, 38... Check valve, 41... Header, 41A... Header, 41B... Header, 41C... Header, 41D... Header, 41E... Header, 41F... Header, 42... Tube, 43... Fins, 44... Inlet port, 45... Outlet port, 46... Connection plate, 47... Port block, 48... Partition wall, 51A... One-pass structure, 51B... One-pass structure, 52A... Two-pass structure, 52B... Two-pass structure, P1...first pass, P2...second pass, P3...third pass, P4...fourth pass

Claims (7)

A condenser provided in a supply flow path for supplying air to the vehicle interior, performing heat exchange between air passing through the periphery and a heat medium passing through the inside, and radiating heat to the heat medium,
A pair of headers extending in the vertical direction and provided at intervals in the horizontal direction,
A plurality of tubes extending in the lateral direction, one end and the other end of which are respectively connected to the header, and a plurality of tubes provided at intervals in the vertical direction,
The flow of the heat medium flowing from one of the headers toward the other of the headers through the plurality of tubes is one path,
The outlet of the final pass is provided below the center in the vertical direction of the final pass. Equipped with two one-path structures that form only one path,
The one-pass structures are overlapped with each other in the ventilation direction, and the heat medium passes through the first pass formed in the one-pass structure on one side and the second pass formed in the one-pass structure on the other side in order. The condenser according to claim 1, which is connected to the condenser. Two paths are formed side by side in the vertical direction, and one path and the other path are provided with two two-pass structures in which the heat medium is connected in order.
Overlapping the two-pass structures in the ventilation direction, the first and second passes formed in one of the two-pass structure, and the third pass and the fourth pass formed in the other two-pass structure, The condenser according to claim 1, wherein the heat mediums are connected so as to pass in order. The condenser according to claim 3, wherein the fourth pass is arranged below the third pass. A supply flow path for supplying air to the vehicle interior,
The condenser according to any one of claims 1 to 4, which is provided in the supply flow path, performs heat exchange between air passing through the periphery and a heat medium passing through the inside, and radiates heat to the heat medium. When,
A heat exchanger provided outside the vehicle compartment for exchanging heat between the outside air passing around and the heat medium passing inside,
A compressor for compressing the heat medium,
An expansion valve for expanding the heat medium,
The air conditioner for a vehicle, wherein the heating medium is circulated in the order of the compressor, the condenser, the expansion valve, and the heat exchanger during heating. The vehicle air conditioner according to claim 5, wherein an object requiring supply of air blowing is disposed on the leeward side of the lower side portion of the condenser. On the leeward side of the condenser, a heater for warming the air passing around is provided,
The vehicle air conditioner according to claim 6, wherein the object is a heat sink provided in an electronic circuit of the heater.

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