JPS5868562A - Reed valve - Google Patents

Abstract

PURPOSE:To improve fatigue-resisting and wear-resisting performance of a reed valve made of a carbon steel that is used for a coolant compressor of a refrigerator and to prevent sticking of oil sludge to the surface thereof, by forming a nickel-phosphor layer and a Teflon layer over the surface of the valve facing an outlet. CONSTITUTION:A reed valve 2 made of a carbon steel or a stainless steel, that is used for a coolant compressor of a refrigerator, is fixed at one end thereof to a valve-seat plate 1 by a screw 4, for instance, together with a backer valve 3 for restricting the opening of the valve 2. Here, over the surface of the reed valve facing an outlet port formed in the valve-seat plate, there are formed a porous nickel-phosphor layer 6 applied by way of electroless plating of nickel- phosphor and a Teflon layer 7 coated over the surface of the rickel-phosphor layer 6 in the manner that it is permeated into pores 5 of the layer 6. By employing such an arrangement, wear-resisting performance of the valve is improved by the nickel-phosphor layer 6 while also improving the fatigue-resisting performance by the electroless plating process, and at the same time, sticking of oil sludge can be prevented by the function of Teflon permeated into the pores 5 of the layer 6.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a reed valve that opens and closes when suctioning or discharging refrigerant in a refrigerant pressure S machine, etc., and the reed valve has the same pumping strength and abrasion resistance as the required characteristics of the reed valve. The purpose is to prevent oysters from forming and adhering to valves, especially foliage.

BACKGROUND ART Conventionally, reed valves used in compressors, etc., which are closed during suction or discharge of refrigerant, are mainly made of carbon steel or stainless steel from the viewpoint of fatigue resistance. However, since the reed valve made of carbon steel is installed in the compression part where the temperature rises the most during operation of the BIB compressor, oil mixed into the refrigerant may be mixed in when the refrigerant is charged or discharged. It's so μ
There was a situation where the particles adhered as suffages, impairing the sealing performance of the reed valve, and rendering the compressor completely unusable.

In order to prevent this problem, there is one that has been improved by applying a surface treatment such as Teflon baking coating to the surface of the reed valve. However, this method has the problem of poor wear resistance, which is a necessary characteristic for a reed valve.

The present invention has been made in view of the above-mentioned drawbacks. 9. Electroless plating of nickel μm phosphorus to form a Bohus shape on the surface of a reed valve made of ferrous steel material. After applying the coating, a Teflon layer is coated to impregnate the nickel-phosphorus layer to create a two-layer structure, which improves the wear resistance of the reed valve.
It solves the problem of fatigue resistance and prevention of fatigue.

The present invention will be explained below based on the embodiment shown in the Vt diagram.

(1) is a valve seat plate, a reed valve (2) and a puff cover that regulates the opening degree of the reed valve (3) T screws (41) are fixedly attached at one end.

The reed valve (2) made of carbon steel has a nickel-phosphorus layer (6) formed by electroless plating of nickel-phosphorus forming a porous shape on its surface, and a porous portion of the nickel-phosphorus layer. (5) A 21111 structure is formed with a Teflon layer (7) coated with K impregnation.

The road valve (2) in the present invention that is $lH as described above
has a two-layer structure in which the surface is electrolessly plated with nickel-phosphorus to form a porous shape, and then a Teflon layer (7) is coated so that the nickel-phosphorus layer is impregnated with Bohus part R511C. y-I
Abrasion resistance is ensured by the J-Nmebuki layer, and the fatigue strength is not reduced because it is treated with electroless plating. Moreover, the Teflon layer (7) is worn out and the nickel-phosphorous layer (
It is possible to provide a useful reed valve that satisfies all the necessary characteristics of a reed valve, such as the porous part (6) (5) K-impregnated Teflon can prevent oil sludge from adhering.

As described above, in a reed valve made of steel or stainless steel, the surface of the reed valve is electrolessly plated with nickel-phosphorus to form a porous shape, and then the 21N-phosphorus layer is applied. 2411 is a surface treatment in which a Teflon layer is applied to impregnate the nickel-phosphorus layer, so even if the Teflon layer is worn out, the Teflon impregnated in the porous part of the nickel-phosphorus layer can prevent oil sludge from adhering to the surface. Nickel-phosphorus plating provides wear resistance of 1R!
[It is possible to provide a useful reed valve that can maintain fatigue strength Jft-M by electroless plating.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a reed valve device according to the present invention, and FIG.
The figure is an enlarged sectional view of the main part. (2)...Reed valve, (5)...Porous part, (6)...Nickel-phosphorus m, (7)
...Teflon layer.

Claims (1)

[Claims] (1) A reed valve made of carbon steel or stainless steel used for refrigerant compression mK for refrigerators. The discharge hole side surface of the reed valve is electrolessly plated with nickel μm phosphorus to form a Bohus shape, and the nickel μm phosphorus layer is impregnated with a Teflon layer to provide a two-layer surface treatment. reed valve.