JPH0315064B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a four-way valve with a built-in filter.

[Conventional technology]

Regarding the conventional example, if you explain it with FIG. 5, 1
is a two-pass type heat exchanger, consisting of a can body 2, heat transfer tubes 3 and 4, and water chambers 5, 6, and 7. 8 and 9 are filters, and 10 is a four-way valve.

The fluid to be passed through the heat exchanger tubes 3 and 4 is supplied to the supply tube 1.
1, passes through the four-way valve 10, enters the heat exchanger 1 via the filter 8, returns to the four-way valve 10 via the filter 9, and is discharged to the discharge pipe 12.

Since the dust mixed in the supplied liquid accumulates on the upstream side of the filter 8, the four-way valve 10 is switched at an appropriate time as shown by the two-dot chain line to supply the liquid from the filter 9 side.
Backwashing is performed to wash the dust accumulated in the filter 8 and discharge it to a discharge pipe 12 via a four-way valve 10.
Dust accumulated in the filter 9 during backwashing is washed and discharged when the four-way valve 10 is switched again to return to the normal flow.

[Problem that the invention seeks to solve]

However, in such conventional devices, the filters 8 and 9 are formed as separate parts from the four-way valve 10, and the supply pipe 11, the discharge pipe 12,
Since the four-way valve 10, the filters 8, 9, and the heat exchanger 1 must be connected by direct flanges or through pipes, a large space is required for disassembling and reassembling operations, and a lot of effort is required. It was something that required

SUMMARY OF THE INVENTION An object of the present invention is to provide a four-way valve in which a filter is integrated with the four-way valve, the space of the device is reduced, the trouble of disassembling and reassembling is eliminated, and the filter is extremely easy to replace.

[Means for solving problems]

As a means for solving the above-mentioned problems, the present invention includes a cylindrical body divided into two chambers by a partition wall perpendicular to the axial direction. The chamber is provided with two fluid sub-inlets and exits, the partition wall is provided with two communication holes that communicate the first chamber and the second chamber, and the first chamber is provided with two fluid sub-inlets. The second chamber is further divided into two small chambers by a partition wall, and each of the two small chambers has a switching valve that switches the connection of the flow path between the main entrance and exit port and the two communication holes. One of the two communication holes communicates with one of the two fluid sub-inlets, and a filter is installed and removed between the communication hole and the fluid sub-inlet in each of the small chambers. This is a four-way valve characterized by the fact that it can be installed.

〔Example〕

Embodiments of the present invention will be described with reference to FIGS. 1, 2, and 3.

Reference numerals 13 and 14 indicate first and second cylindrical bodies, which are stacked vertically so that their central axes coincide and are connected together by flanges 15 and 16 to form one cylindrical body 1.
It has become 7. The upper surface of the first cylindrical body 13 and the lower surface of the second cylindrical body 14 are covered with removable lids 18 and 19. A partition wall 2 is provided on the upper surface of the second cylindrical body 14.
0 is provided, and the inside of the cylinder 17 is divided into a first chamber 21 of the first cylinder and a second chamber 22 of the second cylinder.

The first chamber 21 has two main fluid inlets and outlets 23,
24 is provided, and the second chamber 22 is provided with two sub-inlets 25 and 26 for fluid. In the partition wall 20,
A communication hole 27 that communicates the first chamber 21 and the second chamber 22,
28 are provided.

The first chamber 21 houses a switching valve 34 formed by attaching valve plates 32 and 33 to a support shaft 31 that is rotatably supported by bearings 29 and 30, and is driven by a motor 35 to reciprocate. It's becoming like that. When the valve plates 32 and 33 are in the position indicated by the solid line in FIG. 2, the main inlet/outlet 23 and the communication hole 27 are communicated with each other, and the main inlet/outlet 24 is communicated with the communication hole 28, and when they are in the position indicated by the two-dot chain line, the main inlet/outlet is communicated with each other. 23 and the communication hole 28, and the main entrance/exit 24 and the communication hole 27 are made to communicate with each other.

The second chamber 22 is divided into two small chambers 3 by a partition wall 36.
Each small chamber 37 and 38 has a communication hole 27, an auxiliary entrance 25, and a communication hole 2.
8, communicates with the sub-entrance 26. Each small room 37,
In 38, filters 39 and 40 are provided between the communication hole 27 and the sub-entrance 25 and between the communication hole 28 and the sub-exit 26, and the partitions 41, 42,
43 and 44 are separated.

Guide grooves 45, 46, 47, and 48 are provided in the partition wall 36 and the second cylindrical body 14 in the axial direction to support the filters 39 and 40, and to allow the filters to be pulled out by removing the lid 19. ing.

In use, a four-way valve 49 as shown in FIGS. 1-3 is connected to the heat exchanger 1 as shown in FIG. 4, for example. That is, the main entrance/exit 23 is connected to the supply pipe 11,
The main inlet/outlet 24 is connected to the discharge pipe 12, the sub-inlet/outlet 25 is connected to the water chamber 5, and the sub-inlet/outlet 26 is connected to the water chamber 7.

Therefore, if the switching valve 34 is placed in the position shown by the solid line in FIG.
It enters the heat exchanger 1 through the heat exchanger 1, passes through this, enters the four-way valve 49 through the sub-inlet/outlet 26, passes through the filter 40 and the communication hole 28, and is discharged from the main inlet/outlet 24 into the discharge pipe 12. At this time, the dust accumulates on the section 42 side of the filter 39.

Thereafter, at an appropriate time, if the switching valve 34 is switched as shown by the two-dot chain line in FIG. 2, the fluid flows back and the filter 39 can be backwashed. Dust accumulated in the filter 40 during backwashing is removed from the switching valve 34.
Backwashing can be performed using the normal flow when returning to normal conditions.

A lid may be provided on the side surface of the second cylindrical body 14, and the filters 39, 40 may be supported by radial guide rails so that the filters 39, 40 can be inserted and removed from the side surface in the radial direction.

In the above embodiment, since the filters 39 and 40 are integrated into the four-way valve 49, the piping or connection between the four-way valve and the filter is omitted, making the device extremely compact and requiring less space. Furthermore, since the filter is housed in a separate chamber from the switching valve, the filter can be easily replaced.

〔Effect of the invention〕

According to the present invention, it is possible to provide a compact four-way valve with a built-in filter, which does not require space for the device, facilitates disassembly and assembly work, and also simplifies the work of replacing the filter, resulting in extremely different effects. .

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of an embodiment of the present invention, FIG.
FIG. 3 is a cross-sectional plan view taken along the - line, - line, FIG. 4 is a flow diagram of an example of use, and FIG. 5 is a conventional flow diagram. 1... Heat exchanger, 2... Can body, 3, 4... Heat exchanger tube, 5, 6, 7... Water chamber, 8, 9... Filter,
10... Four-way valve, 11... Supply pipe, 12... Discharge pipe, 13... First cylindrical body, 14... Second cylindrical body,
15, 16...flange, 17... cylinder, 18,
19... Lid, 20... Partition wall, 21... First chamber,
22...Second room, 23,24...Main entrance, 2
5, 26...Sub-exit, 27, 28...Communication hole,
29, 30... Bearing, 31... Support shaft, 32, 33
... Valve plate, 34 ... Switching valve, 35 ... Motor, 36 ... Partition wall, 37, 38 ... Small chamber, 3
9, 40...Filter, 41, 42, 43, 44
...Division, 45, 46, 47, 48...Guide groove, 49...Four-way valve.

Claims (1)

[Claims] 1. A cylindrical body divided into two chambers by a partition wall perpendicular to the axial direction, the first chamber having two main fluid inlets and outlets, and the second chamber having two sub fluid inlets and outlets. The partition wall is provided with two communication holes that communicate with the first chamber and the second chamber, and the first chamber has two main fluid inlets and outlets and two communication holes that communicate with each other. The second chamber is further divided into two small chambers by a partition wall, and each of the two small chambers has one of the two communication holes. One of the two fluid sub-inlets communicates with each other, and a filter is removably provided in each of the small chambers between the communication hole and the fluid sub-inlet/outlet. Four-way valve. 2. The wall of the second chamber opposite to the partition wall is formed with a removable lid, and the filter is held by a slide guide so that the filter can be taken out when the lid is removed. The four-way valve described in item 1.