JPH0645150Y2 - Vehicle heat exchanger - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a vehicle heat exchanger manufactured by stacking tubes, such as an evaporator used in a vehicle air conditioner.

(Prior Art) Conventionally, as a heat exchanger such as an evaporator mounted on a vehicle, an inlet side tank portion and an outlet side tank portion for a refrigerant are provided at one end of a flat tube having a U-shaped flow path, There is a so-called laminated type heat exchanger in which a large number of flat tubes are laminated to form a heat exchanger body.

In this type of heat exchanger, the inlet pipe is arranged on the upstream side so that the expansion valve of the inlet pipe is not cooled by cold air. It is known that an exchanger body is arranged and a refrigerant inlet pipe and an outlet pipe are provided on the side of each tank so as to be orthogonal to the flowing air.

However, in the above heat exchanger, a large amount of the refrigerant flows in the tube near the inlet / outlet pipe, while a small amount of the refrigerant flows in the tube far from the inlet / outlet pipe, resulting in a problem of poor heat exchange rate.

In order to solve this, there is a heat exchanger that distributes the refrigerant supplied from the inlet pipe and supplies it to the inlet tank portion (Japanese Patent Laid-Open No. 62-119373).

In this heat exchanger, the inlet pipes branched to the left and right ends of the inlet tank section are communicated with each other, the central portion of the inlet tank section is partitioned by a partition plate, and the refrigerant is distributed to the left and right of the stacked tubes. The flow rate is made uniform.

(Problems to be solved by the invention) However, according to the heat exchanger described above, although the amount of the refrigerant can be made uniform, a structure in which the inlet pipe is branched to communicate with both left and right sides of the inlet tank is provided. Therefore, there is a problem that the inlet pipe requires a required length, the flow resistance of the refrigerant increases, and the cost increases. Further, if the required length inlet pipe is arranged on the upstream side for the convenience of the expansion valve, there is a problem that the ventilation resistance of the circulating air increases.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a heat exchanger for a vehicle, which can make the amount of refrigerant uniform, reduce the flow resistance of the refrigerant, and reduce the ventilation resistance. And

(Means for Solving Problems) A vehicle heat exchanger according to the present invention has a refrigerant inlet tank portion at one end and a refrigerant outlet tank portion at the other end and is bent in a U shape. The flat tubes that were stacked were sequentially laminated with fins,
A heat exchanger for a vehicle, comprising a heat exchanger body formed by connecting and connecting the inlet side tank section and the outlet side tank section, respectively, wherein the heat exchanger body is arranged in a direction of flowing air. The outlet tank portion is arranged on the upstream side of the inlet tank portion,
An inlet pipe and an outlet pipe of the refrigerant are arranged at substantially right and left central portions of the front surface facing the circulating air of the heat exchanger body,
The inlet pipe is communicated with the left and right substantially central portions of the inlet side tank section, while the outlet pipe is communicated with the left and right substantially central portions of the outlet side tank section, and further between the inlet pipe and the inlet side tank section. In addition, a flow path using tubes located in the left and right central portions of the heat exchanger body is provided.

(Operation) In the vehicle heat exchanger configured as described above, the refrigerant flowing from the inlet pipe passes through the flow path using the tube located at the left and right central portions of the heat exchanger main body, and flows to the left and right in the inlet tank portion. U-turn from the lee of the circulating air in each tube to the windward, and is guided to the outlet pipe through the outlet tank portion.

Therefore, since the refrigerant is distributed to the left and right in the inlet side tank portion, the amount of the refrigerant is made uniform, and since the inlet pipe is communicated with the central portion of the inlet side tank portion, the inlet pipe can be shortened, and the cost, Ventilation resistance and ventilation resistance are reduced. Furthermore, since the refrigerant passes through the tube when flowing from the inlet pipe to the inlet tank portion, the heat exchange rate is further improved.

(Example) Below, one Example of this invention is described based on drawing.

As shown in FIG. 1, the heat exchanger body 10 of the present embodiment is formed by stacking a large number of flat tubes 11 each having a U-shaped flow path 11B formed by combining two tube elements. The corrugated fins 13 are interposed between the respective parts, and the corrugated fins 13 are integrally fixed by brazing. As shown in FIG. 3, each tube 11 includes an inlet side tank portion 11A for refrigerant inflow and an outlet side tank portion 11C for refrigerant outflow at one end side, and each inlet side tank portion 11A and each outlet side tank The portion 11C has communication ports 11a and 11c, respectively, and as shown in FIG. 5, the communication ports 11a and 11c communicate with each other. In FIG. 3, reference numeral 14 is a bulging portion provided obliquely with respect to the flow path so as to increase the surface area of the tube.

A deformed tube 12 is provided at a substantially central portion of the heat exchanger body 10, that is, at a substantially central portion on the left and right of the front surface of the body facing the circulating air W. This tube 12
As shown in FIG. 4, unlike the tube 11 shown in FIG. 3 described above, the refrigerant flow path 12B in the tube 12 is formed in a plate shape, and further, the outlet side tank portion 12C has the above-mentioned flow. Road 12B
The outlet side tank portion 12C is communicated with the tank portions 11C, 11C on both sides through the communication ports 12c, 12c. In addition, the inlet pipe 15 is provided in the upper part of the front facing the circulating air W.
However, outlet pipes 16 are provided so as to project along the flowing air, respectively, on the front surface of the outlet side tank portion 12C.

Deformation tube 12, inlet side tank section 12A, outlet side tank section 1
As shown in FIG. 5, 2C, the inlet pipe 15 and the outlet pipe 16 have an integral structure formed by joining and joining two tube elements.

According to this heat exchanger, the refrigerant supplied from the inlet pipe 15 reaches the inlet tank portion 12A through the flow passage 12B of the deformable tube as shown in FIG. In the inlet tank portion 12A, it is distributed from the central portion to both left and right sides, and is distributed from the inlet tank portion 11A to each tube 11 on both left and right sides. Each tube 1
Within 1, the refrigerant flows through the U-shaped flow path 11B.
In this case, since the inlet tank portion 11A is on the downstream side of the outlet tank portion 11C, when making a U-turn in each tube 11, it will flow in the direction opposite to the flowing air, and the heat exchange rate Can be good.

Furthermore, the refrigerant in each tube 11 merges with the outlet tank portion 12C at the center through each outlet tank portion 11C, and the outlet pipe 1
You will be guided to 6.

Therefore, since the refrigerant supplied from the inlet pipe is distributed to the left and right tubes, the amount of the refrigerant flowing through each tube can be made uniform, and the inlet pipe and the outlet pipe are distributed in the substantially central portion on the front surface of the main body. Since it is installed,
The pipe length can be shortened, the manufacturing cost can be reduced, and the flow resistance of the refrigerant can be reduced. In addition, since the inlet pipe and outlet pipe are arranged in the center of the front and both are arranged so as to follow the flow of the circulating air, the air resistance can be greatly reduced compared to the conventional one, and the heat exchange rate is improved. it can.

The deformable tube is not limited to the one shown in FIG. 4, but may have the structure shown in FIGS. 6 and 7.
The deformable tube 12 shown in FIG. 6 has a bulged portion 18 provided along the flow path, and the deformable tube 12 shown in FIG.
Has a U-shaped flow path 12D, and the inlet pipe 15 can be arranged at any position in the vertical direction according to the convenience of the piping. The flow of the flowing refrigerant is as shown in FIG.

Next, another embodiment of the present invention will be described.

In this embodiment, as shown in FIGS. 9 and 10, an inlet pipe 15 and an outlet pipe 16 are arranged between a deformed tube 12 having a U-shaped channel 12D and an adjacent normal tube 11. It was set up. The flow path 12D of the deformable tube 12 and the outlet side tank portion 12C are partitioned, and the outlet side tank portion 12C and the other outlet side tank portion 11C are provided with a communication port 1 provided in the outlet pipe 16.
6a and 16a communicate with each other. Further, the inlet pipe 15 has a communication port 15a at the base end side thereof connected to a communication port 12c provided in the deformable tube 12. Therefore, the heat exchanger body 10
In the inside, the refrigerant is passed therethrough as in the case of FIG. 8 and has the same effect as that of the previous embodiment.

(Effect of the Invention) As described above, according to the present invention, since the refrigerant is distributed from the inlet pipe to the left and right tank parts, the refrigerant amount in each tube in the heat exchanger body is made uniform and A high heat exchange rate can be expected because a U-turn is made from the leeward side to the upwind side with respect to the circulating air in the tube.

In addition, since the inlet pipe is connected to the center of the inlet tank through the flow path using the tubes located in the left and right center of the heat exchanger body, the inlet pipe itself can be shortened, Since it is possible to reduce the manufacturing cost and the flow resistance of the refrigerant, it is not necessary to dispose the inlet pipe across the front of the heat exchanger body using a branch pipe as in the conventional case. The ventilation resistance of the circulating air can be minimized, and the heat exchange rate can be further improved.

[Brief description of drawings]

1 to 5 relate to an embodiment of the present invention. FIG. 1 is a perspective view of a heat exchanger body, FIG. 2 is a refrigerant flow path diagram, and FIG.
The figure shows a tube as viewed from the direction of arrows AA in FIG. 5, FIG. 4 shows the deformed tube as viewed from the direction of arrows BB in FIG. 5, and FIG. 5 shows a longitudinal section of the main part of the heat exchanger body. FIGS. 6 and 7 are side views showing another embodiment of the deformable tube, respectively, and FIG. 8 is a refrigerant flow path diagram when the deformable tube of FIG. 7 is used, FIG. 9 and FIG. FIG. 10 relates to another embodiment of the present invention, FIG. 9 is a longitudinal sectional view of a main part of a heat exchanger body, and FIG. 10 is a view taken along the line CC in FIG. 9 showing a deformation plate. 10 ... Heat exchanger body, 11 ... Flat tube 11A, 11C ... Inlet tank part, Outlet tank part 11B ... Flat tube flow path 12 ... Deformation tube, 13 ... Fin 15,16 ... Inlet and outlet pipe W ... Through Flowing air

Claims (2)

[Scope of utility model registration request] 1. A flat tube having a U-shaped flow path has a refrigerant inlet side tank section and a refrigerant outlet side tank section at one end side thereof, and the flat tube is sequentially laminated through fins to form the inlet side tank. Section, a heat exchanger for a vehicle comprising a heat exchanger body formed by connecting and connecting the outlet side tank portion to each other, the heat exchanger body, the outlet side tank portion in the direction of the flowing air. Installed on the upstream side of the inlet side tank part, the refrigerant inlet pipe and outlet pipe are arranged at the left and right substantially central portions of the front facing the circulating air of the heat exchanger main body, and the inlet pipe is set to the inlet side. While communicating with the left and right substantially central portions of the side tank portion, the outlet pipe is communicated with the left and right substantially central portions of the outlet side tank portion, and further, a heat exchanger is provided between the inlet pipe and the inlet side tank portion. Flow path using tubes located in the left and right center of the main body A heat exchanger for a vehicle characterized by the above. 2. The heat exchanger for a vehicle according to claim 1, wherein the inlet pipe and the outlet pipe are integrated with the tube in the central portion as a utility model registration.