JPS60122014A - Strainer - Google Patents

Abstract

PURPOSE:To obtain an inexpensive and convenient strainer capable of preventing deterioration of performance without increasing pressure drop of a fluid passage by forming a conventional screen filter as it is to one body comprising plural large and small cylinder having a lap winding structure. CONSTITUTION:Since a primary filter 2-1 is inserted and fitted to an inlet part 1a of a body 1 of a strainer, introduced dusts accumulate in the primary filter 2-1. When the primary filter causes clogging, the resistance of the passage is increased, so the filter 2-1 is detached as contg. the dust from the passage at the inlet part 1a but is sucked into a secondary filter 2-2 comprising a larger cylinder. Since, in this stage, the screen filter 2 is formed to one body by double winding, the position of the detached primary filter 2-1 is fixed, and is not located at such position causing blockage of the passage. Dust introduced continuously is caught by the filter 2-2, and the increase of pressure drop can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a strainer, and particularly to a strainer suitable for use in a fluid circuit such as a refrigeration cycle.

[Background of the invention]

In recent years, separate air conditioners have become mainstream, and the refrigerant piping between the outdoor and indoor units is rotated during installation, resulting in an increasing proportion of dust getting into the refrigeration cycle. The number of failures due to jamming in moving parts of equipment is increasing.

Conventional strainers for fluid circuits have a structure in which a cylindrical screen filter is provided with an opening in the flow path to collect dust in the circuit, or if there is a large amount of dust in the circuit, the above-mentioned screen filter is installed. There was a drawback that the filter became clogged and the flow path resistance increased, resulting in a decrease in the performance There were problems such as leaking through the circuit and causing equipment failure.

[Purpose of Departure]

The present invention has been made to solve the problems of the prior art described above, and is an extremely simple and inexpensive strainer that prevents performance deterioration without increasing pressure loss in the flow path. [Summary of the Invention] The structure of the strainer according to the present invention is such that the strainer is provided with a cylindrical screen filter that opens into a flow path in a body. The filter is integrally molded into multiple large and small overlapping cylinders, the opening of the large cylinder is fixed inside the body, and the opening of the small cylinder is inserted into the flow passage port of the body. It is something.

Additionally, the idea behind developing the present invention is as follows.

When the screen filter is clogged with dust, the flow path resistance increases, creating a force that moves the screen filter. By using this operating force to move the small cylindrical primary filter out of the flow path, pressure loss in the flow path can be reduced. Therefore, if multiple filters were installed separately, the structure would be complicated and the reliability would be poor, so by integrally molding the conventional screen filter into multiple large and small cylinders in a rolled-up shape, the structure was extremely simple. Even after the -order filter is moved, it is integrated with the large cylindrical secondary filter, so it does not come off from the strainer body, making it possible to provide a highly reliable strainer.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be described with reference to FIGS. 1 to 3.

FIG. 1 is a cross-sectional view showing the initial state of a strainer according to an embodiment of the present invention, FIG. 2 is an external perspective view of the screen filter, and FIG. 3 is a diagram showing the strainer shown in FIG. 1 after use. In FIG. 1, which is a cross-sectional view showing the strainer, 1 is a body of the strainer, 1a is a flow passage opening part of the body, 1btd is a flow passage outlet part, and 1c is an inner wall of the body. Arrows indicate the direction of the flow path.

Reference numeral 2 designates a screen filter, which is integrally molded into large and small overlapping cylinders. 2-1 is a small cylindrical primary filter, 2-2 is a large cylindrical secondary filter, and the screen filter 2 installed inside.

The configuration of the screen filter 2 is shown in FIG.

Screen filter 2 is integrally double-wound,
It has a shape in which a small cylindrical primary filter 2-1 is wound inside a large cylindrical secondary filter 2-2. -Bottom surface 2-1b of the -order filter 2-1 and the secondary filter 2-
Bottom surface 2-21) Vi of No. 2, the end of the screen filter member is bent and spot welded to close it.

Further, the seam 2d in the longitudinal direction of the screen filter 2 is formed by spot bath welding or seam resistance welding. Alternatively, the outer secondary filter 2-2 and the inner primary filter 2-1 may be formed into cylindrical shapes separately and then joined at the seam 2d.

In FIG. 2, 2-1a is a small cylindrical opening of the primary filter 2-1, and 2-2a is a large cylindrical opening of the secondary filter 2-2.

A strainer is constructed by mounting such a screen filter 2 in a body 1 as shown in FIG. That is, the large cylindrical opening 2-2a of the 52nd-order filter 2-2
is fixed to the inner wall IC of the body by means of welding or the like with a suitable close contact part, and the small cylindrical opening 2-1a of the primary filter 2-1 is inserted into the flow passage artificial part 1a of the body 1.

1. Please note that 1 shown in Fig. 2 should be assembled in the state shown in Fig. 1.
This can be easily carried out by pulling the tip 2-10 of the secondary filter 2-1 from the channel artificial part 1a side with a scissors tool.

Next, the function of the strainer having the 1'4 structure will be explained.

Since the primary filter 2-1 (l″tt is inserted into the flow path artificial part 1a of the strainer body 1, the inflowing dust accumulates in the primary filter 2-1. The primary filter 2-1 is clogged. As a result, the flow path resistance becomes large, so that the dust is removed from the flow path artificial part 1a and drawn into the large cylinder of the secondary filter 2-2 while retaining the dust, as shown in FIG. Because it is double wound, the position where the primary filter 2-1 comes off and moves is determined.
Do not go to a position where it will clog the flow path. Therefore, the dust still flowing in can be collected by the secondary filter 2-2 in the state shown in FIG. 3, and an increase in pressure loss in the flow path can be prevented.

According to this embodiment, the dust in the fluid circuit is first collected in the -order filter 2-1, and then the pressure loss in the flow path is reduced until the -order filter 2-1 is automatically removed from Himeji. can be reduced and performance can be improved. In addition, the dust clogged in the primary filter 2-1 does not flow out, and the dust that flows in can be collected by the secondary filter 2-2, which prevents dust from entering the fluid circuit and improves the refrigeration cycle. It is possible to prevent breakdowns due to dust contamination of control equipment used in circuits, etc. In this way, the strainer of this embodiment can be manufactured easily and inexpensively by simply doubling the winding of the screen filter compared to the conventional strainer.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to provide an extremely simple and inexpensive strainer that prevents deterioration in performance without increasing pressure loss in the flow path for a strainer used by being attached to a fluid circuit.

If the strainer of the present invention is used in a fluid circuit such as a refrigeration cycle, the reliability of the refrigeration cycle will be improved and it will also help save energy.

[Brief explanation of the drawing]

Claims (1)

[Claims] 1. In a strainer comprising a cylindrical screen filter that opens into a flow path in the body, the screen filter is integrally molded into a plurality of overlapping large and small cylinders, and the opening of the large cylinder is arranged as described above. A strainer, characterized in that it is solidified in a body, and is configured such that a small cylindrical opening is inserted into a channel section of the body.