JPS60150497A - Rotary compressor - Google Patents

Abstract

PURPOSE:To make reductions in part expenses owing to omission of a valve guard as well as in sharp machining expenses owing to a cutback in cover manufacturing processes attainable, by properly selecting the depth of a concaved part of the inner surface of a cover in plate of the conventional valve guard, while making it possible to secure a valve function. CONSTITUTION:A joining form of a discharge valve part cover 24 is formed into a part of a concaved part 21b of a lower bearing 21 assembling parts related to a discharge valve 22, while a discharge gas circulating hole 21g, which leads discharge gas into an upper part of a compressor body by way of the lower bearing 21 and the compressor body, is installed. With this constitution, the concaved part 21b aone is blocked up, therefore a discharge gas flow passage from a discharge port 21c comes possible to be formed, whereby an inner surface of the cover 24 comes possible to display its role equal to a valve guard function in place of the conventional valve guard required so far. In addition, the amount of materials used for the cover 24 is obtainable easily from simple flat plate press punching not from expensive drawing and, what is more, its area is formed into the irreducible minimum of a demand, thus a cost-saving effect is brought into full play, while a sharp reduction in machining expenses owing to a cutback in manufacturing processes for the cover 24 comes to fruition.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a discharge valve part of a rotary compressor that forms a discharge gas port in lubricating oil stored at the bottom of a closed container, and a rotary compressor that can push the lubricating oil out of the compressor without receiving resistance. This invention relates to a structure in which a discharge gas flow path is formed by a cover, leading to the upper part of the main body.

An example of a discharge flow path type *i including a discharge valve mounting structure of a conventional rotary unit compressor will be explained with reference to FIGS. 1 and 2.

FIG. 1 shows an example of the structure of a general rotary compressor, in which 1 is a compressor body, 2 is an electric motor, and these are arranged in a closed container 6 as shown in FIG. Compressor body 1
is cylinder 4. Upper bearing 5, 9 lower bearing 6, rotating shaft 7. It is composed of rollers 8 and the like, and an electric motor rotor 2a is joined to the upper part of the rotating shaft 7 to exhibit the desired compression function. The lower bearing 6 has a discharge valve 9. A discharge valve part 10 is joined with a screw 11, and a cover 12 formed by plastic working of a steel plate is further joined to cover the entire lower bearing 6 with a valve-related part 41.

FIG. 2 shows the lower bearing 6, discharge valve holder, and discharge box presser 10 shown in FIG. Okoji 11. This shows an example of the detailed shape of the cover 12, in which the flange portion 6a of the lower bearing 6
A concave portion 6b is formed in a part of the concave portion 6b, and a discharge cusp port 6C is provided within the concave portion 6b.

A square seat 6d, a valve seat escape portion 6e, a joint screw hole 6f for the discharge valve 9° valve portion 10, etc. are formed.

The housing 6g is a discharge gas circulation hole formed on the flange surface 6a of the lower bearing 6 to guide the waste discharged from the discharge boat 6C to the upper part through the inside of the compressor main body 1. Although not shown, the cylinder 4. of other compressor main body components. The upper bearing 5 also has gas flow holes opened at positions facing the gas flow holes 6g of the lower bearing B, respectively.

On the other hand, in the conventional rotary unit compressor described above, it is necessary to increase the size of the cover 12, which is contrary to resource saving, and also
There is a problem that the plastic working efficiency is low due to the complicated shape.

Although the valve part is quite small, it has disadvantages such as the use of a valve part that requires a high degree of sheathing.

The present invention aims to eliminate the above-mentioned deficiencies of conventional rotary unit compressors. That is, the discharge gas flow hole is opened from the flange of the lower bearing into a concave portion formed at an arbitrary depth from the flange surface on which the discharge valve etc. are attached, and the cover shape is in close contact with the flange surface of the lower bearing. By forming the cover from a press-cut product with the minimum required area and shape to close the concave shape, we are able to save resources for the cover molding material, and the discharge valve is brought into contact with the inner surface of the cover, so that the discharge valve is made of discharge waste. This valve also has the function of preventing the valve from opening too much, and the purpose is to omit the conventional valve part parts.

The present invention will be explained below with reference to an embodiment shown in FIGS. 6 to 4.

21 in Figure 6 is the lower bearing, lower bearing 21
A part of the flange surface 21a forms a concave portion 21b,
Inside the concave portion 2Ib are a discharge gas port 21c and a valve seat 21d similar to the conventional example.

Hole 21 for joining seat relief J1521e and discharge valve 9
In addition to the hole f formed therein, a discharge gas flow hole 21g for guiding the discharge gas to the upper part is also opened in a part of the concave portion 21b. , 22 is a discharge valve, 26 is a screw or rivet on the discharge valve 22, 24 is a cover, and the cover 24 has a flat plate shape having the minimum shape and area necessary to cover the entire concave portion, A portion of the cover 24 extends to form a lower bearing mounting hole 24a through which the compressor body mounting screw 25 of the adjacent lower bearing 21 passes.

FIG. 4 shows a state in which the parts shown in FIG. 6 are joined together. After the discharge valve 22 is INK-jointed at a predetermined position, a cover 25 is placed on top of it at an arbitrary distance from the upper surface of the discharge valve 22. and are joined together. As a result, the discharge gas discharged by the rotation of the compression mechanism causes the discharge valve 22 to open instantaneously, but in this case, if the opened valve opens too much, there will be a closing delay and the compressor efficiency will decrease. A valve part mechanism is required to prevent the valve from opening too much.

In the present invention, instead of the conventional valve part 10, the inner surface of the cover 25 can obtain a valve part function by appropriately selecting the depth of the concave portion 21b.

The joint shape of the discharge valve part cover of a rotary complete compressor is designed to pass through the lower bearing 21 and the compressor body 1 to a part of the concave part 21b of the lower bearing 21 where the discharge valve related parts are assembled. By providing a discharge gas circulation hole 21g in the upper part for guiding the discharge gas, the concave portion 21
By blocking only b, it becomes possible to form a discharge gas flow path from the discharge gunboat 21C, and the cover 25 has a valve part function that replaces the valve part 10, which was necessary in conventionally known rotary compressors. There are benefits that are equally demonstrated within the inner world. , (in this case, cover 25 depending on the compressor specifications)
The shape of the discharge valve contact surface may be any uneven shape on the flat plate. ) The present invention described above eliminates the use of acid in the cover forming material, which has been a drawback in conventional compressors, and can be done manually through drawing and simple flat press punching.Moreover, it saves resources (reduces material costs) by minimizing the necessary area. ] Not only can the effect be fully demonstrated, but also the cover
25 By shortening the manufacturing process, it is possible to significantly reduce processing costs, and by omitting the valve part, it is possible to reduce parts costs.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view showing an example of the structure of a conventionally known rotary complete compressor, FIG. 2 is a perspective view showing an exploded state of valve-related components of the conventionally known rotary complete compressor shown in FIG. 1, and FIG. FIG. 4 is a perspective view showing an example of the shape of a rotary compressor assembly according to the present invention, and FIG. 4 is a perspective view showing an assembled state of each of the components shown in FIG. 21・-rs bearing, 21a...flange surface, 2
1b...Concave shaped part, 21C...Discharge gas port, 2
1d... Valve seat, 21e... Seat relief part, 21
f...discharge well junction hole, 21g...discharge gas distribution hole,
22...Discharge fP, 25...Discharge valve joining screw or rivet, 24...Cover, 24a...Cover 24
Lower bearing mounting type, 25...screws. ′) −; I ro? 1 V, 4 old t) 22 Procedural amendment C method)! JtI'1's Large and Small 1980'1'5', I'l Application No. 15741, Title of Invention Person who makes a rotary complete compressor in the city IF II Il, No I Town R Patent Applicant B +1: ” 5 lsu11(ko(-: n1 11
Subject of amendment by agent Contents of amendment to include all columns of the specification As per the engraving and attachment of the specification attached to the application. "No change in content"

Claims (1)

[Claims] In a rotary complete compressor, where a concave discharge valve mounting part is formed on a part of the flange of the lower bearing that forms the compression mechanism part of the rotary complete compressor, the discharge valve is attached to the discharge valve mounting part with screws, etc. After that, the entire concave part is sealed with a flat cover along with the discharge gas circulation hole that opens in the same gate-shaped discharge valve part and guides the discharge gas to the upper part of the compressor body, and the lower bearing mounting surface side of the cover is closed. A rotary compressor characterized in that a discharge gas flow path is formed by exerting the function of a discharge valve.