JPH04306492A - Structure of coupling for inlet port and outlet port of heat exchanger - Google Patents

Abstract

PURPOSE:To improve the degree of freedom of designing as well as the workability of piping works by a method wherein the title structure is equipped with a union block, having the connecting units of pipelines of inlet side and outlet side of pipes for outlet port and inlet port of a heat exchanger, and a plate coupling, connected and fixed to the connecting units of the union block for external pipelines. CONSTITUTION:A union block 6 is a rectangular parallelpiped substantially and an inlet side pipeline connecting hole 21 as well as an outlet side pipeline connecting hole 22 are provided on the connecting surface 20 of pipelines while an inlet port pipe connecting hole 23 as well as an outlet pipe connecting hole 24 are provided on the side surfaces of the same and these holes are connected in the union block 6. An inlet pipe 8 and an outlet pipe 9 are connected to the pipe connecting holes 23, 24 and are fixed by welding so that heat exchanging medium will never be leaked. A plate coupling 12 is fixed to the pipeline connecting hole 21 of the union block 6 through a screw to connect an inlet side pipeline 10 to the union block 6. The plate coupling 12 is provided with a connecting pipe 25 integrally and the heat medium will never be leaked out by an O-ring 27. An outlet side pipeline is connected in the same manner. Accordingly, piping work effected by single hand can be effected.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention is a parallel flow type heating system in which the inlet and outlet pipes of a header tank are connected to a union block provided at an arbitrary position, and external piping is connected to this union via a plate joint. Regarding the entrance/exit structure of the exchanger.

0002

2. Description of the Related Art In general, a parallel flow type heat exchanger has a plurality of parallel flat tubes stacked one on top of the other with wavy fins interposed therebetween, and a header tank is connected to each end of these tubes. The interior of one of the header tanks is divided into an inflow chamber and an outflow chamber, and an inlet pipe and an outlet pipe, which communicate with each of these chambers and have a union at their tip, are attached to the header tank. External piping is connected through this union, and the heat exchange medium is sent to and received from the heat exchanger. That is, this heat exchange medium is
The heat enters the inflow chamber of the header tank from the piping via the inlet pipe, exchanges heat while passing through the tube, reaches the outflow chamber, and is sent from the heat exchanger to the piping via the outlet pipe.

[0003] However, since the unions are individually provided for each inlet and outlet pipe, when connecting the pipes, the strength of the inlet and outlet pipes alone tends to be insufficient.
There was a risk that the inlet/outlet pipe would be deformed and damaged.

[0004] Therefore, it is known that individual inlet/outlet pipes are integrated into a single block to increase strength and prevent deformation during connection (for example,
Jitsuhei No. 2-13951).

[0005]

However, according to the conventional inlet/outlet joint structure of a heat exchanger, the inlet/outlet pipes are integrated, so that the inflow chamber and outflow chamber of the header tank to which the inlet/outlet pipes are connected are separated. By providing an intermediate chamber between these two chambers, the tubes between both header tanks can be divided into multiple passage groups, allowing the heat exchange medium to flow back and forth between the header tanks multiple times to create multiple passes. This resulted in the inconvenience that the performance of the heat exchanger could not be improved. Further, the position where the union is provided is limited near the boundary between the inflow chamber and the outflow chamber of the header tank, resulting in a disadvantage that the degree of freedom in design is impaired. Furthermore,
When the heat exchanger is installed and external piping is connected to the union, the piping must be held and fixed, requiring both hands to be operated, resulting in the inconvenience that piping work cannot be easily performed.

SUMMARY OF THE INVENTION Therefore, it is an object of the present invention to provide an inlet/outlet joint structure for a heat exchanger that can accommodate multiple passes of the heat exchanger and improve piping workability and flexibility in the design position of the union. .

[0007]

[Means for Solving the Problems] The inlet/outlet joint structure of the heat exchanger of the present invention has a plurality of parallel tubes stacked together via fins, header tanks are connected to both ends of the tubes, and a heat exchange medium is An inlet/outlet joint structure for a parallel flow type heat exchanger in which an inlet/outlet pipe is provided in the header tank, wherein the inlet/outlet pipe is connected to a union block having inlet and outlet piping connections, and connection of external piping. The structure includes a plate joint provided at the end and connected and fixed to the connection part.

[0008]

[Function] Since the header tank is provided with separate inlet and outlet pipes, the inlet and outlet chambers of the header tank can be provided separately from each other, and by providing an intermediate chamber between them, multiple heat exchangers can be used. Can be passed. Furthermore, since the union block is fixed to the header tank via the inlet/outlet pipe, the union block can be set at any desired position by adjusting the inlet/outlet pipe. Further, since a plate joint is provided at the connection end of the external pipe and the pipe is connected to the union block by this plate joint, the connection work can be easily performed with one hand without holding the pipe.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 and 2, the heat exchanger 1 of this embodiment has a plurality of mutually parallel flat tubes 2 stacked together with wavy fins 3 interposed therebetween, and an input/output header tank 4 is provided at one end of these flat tubes 2. On the other hand, an intermediate header tank 5 is connected to the other end. A union block 6 is fixed to the side of this input/output header tank 4 by a bracket 7, and the inlet pipe 8 and outlet pipe 9 of the input/output header tank 4 are connected to this union block 6, and the external input and output sides are connected to each other. The side pipes are connected via plate joints 12 and 13, respectively. Then, the heat exchange medium is supplied from the inlet pipe 10 to the heat exchanger 1 via the inlet pipe 8, and the heat exchange medium is supplied to the heat exchanger 1 via the outlet pipe 9 to the outlet pipe 1.
It is being sent to 1.

The inside of the input/output header tank 4 is provided with an intermediate chamber 15 in the center by a partition plate 14, and has an inflow chamber 16 connected to the inlet pipe 8, and an outflow chamber 17 connected to the outlet pipe 9. On the other hand, the interior of the intermediate header tank 5 is divided into two chambers by a partition plate 14, and the flat tube 2 between both header tanks 4 and 5 is divided into a plurality of flow path groups (four groups in this embodiment). It is divided to form a Therefore, the heat exchange medium that has flowed into the inflow chamber 16 is
The fluid flows back and forth through both header tanks 4 and 5 multiple times (multiple passes) through these divided flat tubes 2, and flows into the outflow chamber 17. Note that 18 indicates a blind cap that closes the openings at both ends of each header tank 4, 5, and 19 indicates a side plate that protects the wavy fins 3.

The union block 6 is fixed to the input/output header tank 4 via a bracket 7, and the bracket 7 is formed into a long plate shape having a plurality of bent portions.
The base end portion is fixed by sandwiching the above-mentioned input/output header tank 4,
The tip part holds and fixes the union block 6 by screwing. Further, as shown in FIGS. 3 and 4, the union block 6 is formed into a substantially rectangular parallelepiped, and the pipe connection surface 20 is provided with an inlet pipe connection hole 21 and an outlet pipe connection hole 22. . Further, an inlet pipe connection hole 2 is provided on the side surface of the union block 6 relative to the pipe connection surface 20.
3 and an outlet pipe connection hole 24 are provided, and are connected to the inlet pipe connection hole 21 and the outlet pipe connection hole 22, respectively, inside the union block 6. The inlet pipe 8 is connected to the inlet pipe connection hole 23, and the outlet pipe connection hole 2
An outlet pipe 9 is connected to each of the outlet pipes 4 and each is securely fixed by welding such as brazing so that the heat exchange medium flowing therein does not leak.

[0012] The input side piping 1 is connected to the input side piping connection hole 21.
0 is connected via a plate joint 12, and this plate joint 12 is fixed to the union block 6 with screws 26, so that the inlet pipe 10 is connected to the union block 6. That is, the plate joint 12 is
It is formed into a substantially long plate shape and is fixed to the connection end of the inlet pipe 10. In addition, at one end of the plate joint 12 to which the inlet pipe 10 is fixed, a connecting pipe 2 communicating with the inlet pipe 10 is attached.
5 is integrally provided, and a screw hole is provided through the other end. This connecting pipe 25 is surrounded by an O-ring 27, and when the inlet pipe 10 of the union block 6 is connected, the O-ring 27 connects the inlet pipe connection hole 21 of the union block 6 and the plate joint. The 12 connecting pipes 25 are connected without any gaps, so that the heat exchange medium can flow without leaking. Therefore, after fitting and positioning the connecting pipe 25 of the plate joint 12 into the inlet pipe connecting hole 21 of the union block 6, the screw 2
6, the plate joint 12 can be fixed to the union block 6 and the inlet pipe 10 can be connected, so piping can be done with one hand.

As explained above, the inlet/outlet joint structure of the heat exchanger of this embodiment allows the heat exchange medium sent from the inlet pipe 10 to pass through the union block 6, as shown by the arrows in FIG. After passing through the inlet pipe 8 and entering the heat exchanger 1 for heat exchange, the flow flows out to the outlet pipe 9 and passes through the union block 6 again to the outlet pipe 1.
1.

[0014] Therefore, since the inlet/outlet pipes provided individually in the inlet/outlet header tank are connected to the union block, the inlet and outlet chambers of the header tank are not adjacent to each other but are provided separately. By providing an intermediate chamber in between, the heat exchanger can have multiple passes, and the performance of the heat exchanger can be improved. Further, since the union block is fixed to the header tank via the inlet/outlet pipe, the fixing position of the union block can be changed by adjusting the inlet/outlet pipe, and the degree of freedom in design can be improved. Further, a plate joint is provided at the connecting end of the pipe, and the pipe is connected and fixed to the union block via the plate joint, so that work can be easily performed with one hand, and piping work efficiency can be improved. Furthermore, since the union block is fixed to the header tank via the inlet and outlet pipes and the bracket, the structural strength is increased and the bracket can be simplified. Since the bracket can be made of aluminum like other members and can be assembled all at once by welding or brazing, production costs are reduced and economical efficiency is improved.

[0015]

[Effects of the Invention] As explained above, according to the inlet/outlet joint structure of the heat exchanger of the present invention, the inlet/outlet pipes provided individually in the header tank are connected to the union block. The outflow chambers can be provided apart from each other, and by providing an intermediate chamber, the heat exchanger can be made to have multiple passes and its performance can be improved. Also,
Since the union block is fixed to the header tank via the inlet/outlet pipe, the union block can be fixed at any position by adjusting the inlet/outlet pipe, increasing the degree of freedom in design. Furthermore, a plate joint is provided at the connection end of the external piping, and the piping is connected to the union block via this plate joint, so connection operations can be easily performed without holding the piping, improving piping work efficiency. can.

[Brief explanation of the drawing]

FIG. 1 is a front view of a heat exchanger according to an embodiment of the present invention.

FIG. 2 is a side view of the heat exchanger of this embodiment.

FIG. 3 is a front view of the union block of this embodiment.

FIG. 4 is a longitudinal sectional view of the union block of this embodiment.

[Explanation of symbols]

1 Heat exchanger 2 Flat tube 3 Wavy fins 4 Input/output header tank 5 Intermediate header tank 6 Union block 8 Inlet pipe 9 Outlet pipe 10 Inlet piping 11 Outlet piping 12, 13 Plate joint 21 Inlet pipe connection hole 22 Outlet piping connection hole

Claims (1)

[Claims] 1. A parallel flow type heat exchanger in which a plurality of tubes parallel to each other are stacked via fins, a header tank is connected to each end of the tube, and an inlet/outlet pipe for a heat exchange medium is provided in the header tank. The inlet/outlet joint structure of the container includes a union block to which the inlet/outlet pipe is connected and has inlet and outlet pipe connections, and a plate joint provided at the connection end of the external piping and connected and fixed to the connection part of the union block. An entrance/exit structure for a heat exchanger characterized by comprising: