JPH01167593A - Heat exchanger - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to improvements in various heat exchangers such as evaporators and condensers.

(Prior Art) Conventionally, in this type of heat exchanger, US Pat. No. 461
As disclosed in the specification of No. 5385, a pair of left and right tanks made of metal pipes with a circular cross section are erected in parallel with each other with a distance therebetween, and a plurality of heat transfer tubes with a flat cross section are arranged along the axis of each tank. Some heat transfer tubes have a width that is perpendicular to the direction, and are fitted horizontally between the tanks, and a plurality of fins are interposed between the heat transfer tubes.

(Problem to be Solved by the Invention) However, in such a configuration, the open end of each heat transfer tube is attached to the peripheral wall of each tank so that its width direction is orthogonal to the axis of each tank. Because they are fitted, the diameter of each tank must be larger than the width of each heat transfer tube, and as a result, the wall thickness of each tank must be made unnecessarily large in order to ensure pressure resistance. requested. In addition, in order to fit the open end of each heat transfer tube to the peripheral wall of each tank, it is necessary to drill a plurality of radial elongated holes in the peripheral wall of each tank along the axial direction. It was difficult to perform drilling work accurately. In addition, when assembling each heat transfer tube with each fin stacked on each tank, the thickness of each heat transfer tube, the height of each fin, and the pitch accuracy of each radial slot should be strictly determined. The problem is that it has to be done.

In addition, when attaching joint members to the inlet and outlet of the heat exchange fluid in each tank, the joint members must be attached directly to the outer curved surface of each tank. This becomes extremely difficult when the diameter of the tank is large. In such a case, it is conceivable to attach each joint member after flattening a part of the outer circumferential curved surface of each tank, but such flattening as described above is extremely difficult.

Therefore, in order to deal with the above-mentioned problems, the present invention provides a heat exchanger in which each tank is constructed by effectively utilizing a laminated structure of a plurality of metal pipes having a circular cross section.

(Means for solving the problem) In solving the problem, the structural features of the present invention are as follows:
A pair of longitudinal tanks erected in parallel with each other at intervals, and a pair of longitudinal tanks installed horizontally in parallel to each other so as to have a width perpendicular to the longitudinal direction of each tank. A heat exchanger comprising a plurality of heat transfer tubes with a flat cross section and fins interposed between each of the heat transfer tubes, the plurality of sealed metal pipes having an axis along the width direction of each of the heat transfer tubes. are stacked so that their axes are parallel to each other to form each of the two tanks, and one end opening of each of the heat transfer tubes is stacked so that the one end opening of each of the one side tanks is opposite to the one end opening of each of the heat transfer tubes. Each of the heat transfer tubes is fitted onto the axial circumferential wall of the sealed metal pipe, and the other opening of each of the heat transfer tubes is connected to the axial circumferential wall of each of the sealed metal pipes of the other side tank, which are respectively opposed to the other end opening. A heat exchange fluid is fitted into each of the sealed metal pipes, one end of which is located at one end in the stacking direction, and one end of the sealed metal pipe which is located on the other end in the stacking direction. An opening for introducing the heat exchange fluid into the tank and an opening for leading out the heat exchange fluid in the tank are provided, respectively.

(Function and Effect) Therefore, in the present invention configured in this way, by configuring each of the tanks as described above by effectively utilizing the laminated structure of each of the sealed metal pipes, each of the heat transfer tubes can be Since the width directions of the left end opening and the right end opening respectively coincide with the axial direction of the axial peripheral wall of each of the sealed metal pipes, the diameter of each of the sealed metal pipes can be reduced.

Therefore, the pressure resistance of each tank can be increased while reducing the wall thickness of each sealed metal pipe, and the weight of each tank can be reduced. In addition, when attaching each joint member for inflow and outflow of heat exchange fluid to both or one of the tanks, each joint member is attached in the axial direction to the opening at one end of each of the above-mentioned sealed metal vibrators. Since only the joint members are required, the work of attaching each of these joint members becomes easy.

In addition, when assembling the tanks, each heat transfer tube, and each fin, the left end opening and right end opening of each heat transfer tube should be connected to the axial peripheral wall of each of the corresponding sealed metal pipes. After fitting each fin, it is sufficient to attach each fin to each heat transfer tube, so that the assembly work as a heat exchanger is facilitated.

(Example) Hereinafter, one example of the present invention will be described with reference to the drawings.
Figures 3 to 3 show an example in which the present invention is applied to a heat exchanger employed in a near conditioner for a vehicle. A pair of tanks 10.10 (only the left tank is shown in each figure), and a plurality of heat transfer tubes 20.10 with flat cross-sections installed horizontally in parallel between both tanks 10.10.
....

20 and each fin 30 arranged in parallel to each of these heat transfer tubes 20.

The left side tank 10 includes a plurality of circular cross-sectional metal pipes PL, P2.
+Pn, and each of these metal pipes Pi, P2
*..., Png, and Pn are stacked and fixed in the vertical direction with their respective axial directions horizontal, as shown in FIGS. 1 and 2. A metal pipe P2 is fitted into a circular opening Pla bored in the soil of the peripheral wall of the metal pipe P1 at a burring hole P2a formed in the lower part of the peripheral wall, and communicates with the inside of the metal pipe Pl. This metal pipe P2 includes metal pipes PI, P3 .
~.

The metal pipe P2 has a longer axial length than Pn-U and Pn, and a joint member 40 necessary for the inflow of the heat exchange fluid is coaxially attached to the tip of the metal pipe P2.

The metal pipe P3 communicates with the inside of the metal pipe P2 by fitting into a circular opening P2b formed in the upper part of the peripheral wall of the metal pipe P2 at a burring hole processing part P3a formed in the lower part of the peripheral wall. A metal pipe P4 is welded to the lower part of the peripheral wall of the metal pipe P3. The metal pipe Pn-3 has a burring hole part Pn-3a formed in the lower part of the peripheral wall thereof, and a circular opening pn-q (1-) bored in the upper part of the peripheral wall of the metal pipe Pn-u. The lower part of the peripheral wall of the metal pipe Pn-u is about to be welded to the soil portion of the peripheral wall of the metal pipe Pn-3.

The metal pipe P n-I has the same axial length as the metal pipe P2, and the tip of the metal pipe P n-1 has a
A joint member 50 necessary for the outflow of the heat exchange fluid is coaxially attached. In addition, metal pipe P n-1
is the burring hole part Pn- formed in the lower part of the peripheral wall.
At lit, the metal pipe Pn- is fitted into the two circular holes Pn- which are bored in the upper part of the peripheral wall of the metal pipe Pn-Y.
The metal pipe Pn-1 is connected to the circular opening pn-1b bored in the upper part of the peripheral wall of the metal pipe Pn-l.
n is the burring hole processing part Pn formed at the lower part of the peripheral wall.
It is fitted at point a and communicates with the inside of the metal pipe Pn'-1.

Further, each of the metal pipes P4 to pn-+ is also connected by fitting or welded in substantially the same manner as described above. However, the number of sets of mutually communicating metal pipes in each of the metal pipes P1 to Pn is determined depending on the use and size of the heat exchanger. Further, the openings at both ends of each of the metal vibrators PI, P3 to Pn-U, and Pn are each sealed with a cover body 11, and each metal pipe P
2. One end opening of Pn-+ is also sealed by the lid 11, respectively. In addition, each metal pipe P2. The right tank 10 has substantially the same configuration as the left tank 10, except for the metal pipes corresponding to Pn-+.

As shown in FIGS. 1 to 3, the plurality of heat transfer tubes 20 to 20 are arranged in both tanks 10.1 with their respective width directions horizontal.
It is assembled between 0 and 0, and each heat transfer tube 20~
The left end openings 21 to 21 of the left end openings 20 are connected to the respective metal vibrators Pi, P2 . P
3. ....

Each elongated hole part pH, P21. P31. ....

Pn-1, Pn+ are respectively fitted to each metal pipe PI, P2. P3. ---, Pn-1, is open in Pn. On the other hand, the right end openings (not shown) of each of the heat transfer tubes 20 to 20 are formed into elongated holes bored in the axial direction in the inner circumferential wall of each metal pipe of the right side tank 10 facing the right end openings. The metal pipes are respectively fitted into the metal pipes and opened into the respective metal pipes. In addition, a plurality of fins 30 to 30
Of these, the lowest fin 30 is attached to the bottom surface of the lowest heat transfer tube 20, and the remaining fins 30 to 30 are attached to the top surface of each heat transfer tube 20 to 20. There is.

In this embodiment configured as described above, the openings at both ends of each of the heat transfer tubes 20 to 20 are aligned in the width direction of both tanks 10.
Since the inner circumferential walls of each of the 10 metal pipes coincide with each other in the axial direction, the diameter of each of the metal pipes can be reduced. Therefore, it is possible to increase the pressure resistance of each tank 10 while reducing the wall thickness of each metal pipe.
0 weight reduction can be achieved. Also, both joint members 40°50 are connected to both metal pipes P2. Since the joint members 40, 50 can be attached to Pn-1 in various directions, the work of attaching each joint member 40, 50 becomes easy.

Furthermore, since the longitudinal direction of each elongated hole formed in the inner circumferential wall of each of the metal pipes coincides with the axial direction of each of the inner circumferential walls, the drilling work of each of the elongated holes becomes easy. , promote productivity improvement. In addition, since the axial length of each of the metal pipes is short and the axial direction of each of the metal pipes coincides with the longitudinal direction of each elongated hole, each end surface of each of the metal pipes can be accurately flattened. can be easily processed while maintaining In addition, variations in the thickness of each heat transfer tube 20 to 20 and the height of each fin 30 to 30 are absorbed by the burred hole portion of each metal pipe. Each height tolerance can be increased, which helps reduce costs.

Also, both tanks 10.10. Each heat transfer tube 20~20
When assembling the fins 30 to 30 to each other, the openings at both left and right ends of the heat transfer tubes 20 to 20 are fitted into the elongated holes of both the left and right tanks 10.10, and then each fin 30
30 can be installed along each of the heat transfer tubes 20 to 20, so the assembly work as a heat exchanger becomes easy.

Moreover, when the heat exchange fluid flows into the joint member 40,
Under the heat dissipation action of each fin 30 to 30, this heat exchange fluid is transferred to each communicating metal pipe of the left tank 10, each heat transfer tube communicating with these, and each communicating metal bier of the right tank 10 communicating with these. The water flows out from the joint member 50 by passing alternately from the bottom to the top. In such a case, simply changing the number of communicating sets of metal pipes in each tank 10,
Proper flow of heat exchange fluid can be created to match the heat exchange characteristics.

In addition, in carrying out the present invention, the joint members 40 and 50 may be attached to the right tank 10 instead of the left tank 10 (also, both joint members 40 and 50 may be attached to the right tank 10).
．． 50 may be attached to the right tank 10.

Further, in carrying out the present invention, the stacking and fixing of each metal pipe in each tank 10 may be performed by spot welding, special brackets, etc., without using burring hole processing.

Furthermore, in implementing the present invention, the present invention is not limited to heat exchangers such as condensers, evaporators, and radiators installed in military vehicles (for example, the present invention can be applied to heat exchangers of general household air conditioners, etc.). It may also be carried out.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway sectional view of a heat exchanger according to the present invention taken along line 1-1 in FIG. 2, and FIG. 2 is a partially cutaway sectional view of the heat exchanger taken along line 2-2 in FIG. , and FIG. 3 are partially cutaway perspective views of the heat exchanger. Explanation of symbols 10...Tank, 11...Lid, 20...Heat transfer tube, 21...Left end opening, 30...Fin, P
I, ..., pn... Sealed metal pipe, Pll,
..., Pnl ... Long hole part.

Claims (1)

[Claims] A pair of longitudinal tanks erected in parallel with each other at intervals, and a pair of longitudinal tanks installed horizontally in parallel to each other so as to have a width perpendicular to the longitudinal direction of each tank. A heat exchanger comprising a plurality of heat transfer tubes with a flat cross section and fins interposed between each of the heat transfer tubes, the plurality of sealed metal pipes having an axis along the width direction of each of the heat transfer tubes. are stacked so that their axes are parallel to each other to form each of the two tanks, and one end opening of each of the heat transfer tubes is stacked so that the one end opening of each of the heat transfer tubes is stacked so that the one end opening of each of the one side tanks is opposite to the one end opening of each of the one side tanks. Each of the heat transfer tubes is fitted onto the axial circumferential wall of the sealed metal pipe, and the other end opening of each heat transfer tube is fitted onto the axial circumferential wall of each sealed metal pipe of the other side tank, which faces the other end opening. A heat exchange fluid is fitted into each of the sealed metal pipes, one end of which is located at one end in the stacking direction, and one end of the sealed metal pipe which is located at the other end in the stacked direction. A heat exchanger characterized in that an opening is provided for introducing the heat exchange fluid into the tank, and an opening is provided for leading out the heat exchange fluid in the tank.