JPH08219057A - Rotary compressor - Google Patents

Abstract

PURPOSE: To facilitate assembling work without strictly controlling parts tolerance in order to reduce the dislocation of a valve from the valve seat of a discharge valve device and moreover without causing the increase of material cost in a rotary compressor of such constitution that a motor-driven element is enclosed on the upper side of a closed container while a rotary compression element is enclosed on the lower side and that the discharge valve device is provided at the main frame of the rotary compression element. CONSTITUTION: A discharge valve device is formed into such structure that a protruding part 18b protruding into a recess 18 having a valve fitting part 18a and a valve seat 10 machined at a main frame is provided at the valve fitting part 18a side end part and that a recessed part 19b to be engaged with the protruding part 18b is provided at the fitting part 19a side end part of a valve 19.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention generally relates to rotary compressors for air conditioning and refrigeration, and more particularly to improvement of a discharge valve device of this rotary compressor.

[0002]

2. Description of the Related Art FIG. 4 is a sectional view of a conventional rotary compressor, FIG. 5 is an enlarged plan view of the vicinity of a discharge valve device shown in FIG. 4, FIG. 6 is a sectional view taken along line AA of FIG. 5, and FIG. 5, the positional relationship diagram of the valve and valve seat of the discharge valve device shown in FIG. 6, FIG. 8 (A) is an enlarged plan view of the depression shown in FIG. 5 and FIG. 6, FIG. 8 (B) is an enlarged plan view of the valve, FIG. 9 shows another conventional discharge valve device.
[Fig. 3] is an enlarged plan view of the depression, and (B) is an enlarged plan view of the valve.

In the rotary compressor shown in FIG. 4, an electric element 2 is housed on the upper side of a closed container 1, and a rotary compression element 3 is housed on the lower side.
The refrigerant fluid from the receiver tank 4 is sucked from the inlet 5, compressed by the rotary compression element 3, and discharged from the discharge valve device 7 provided in the main frame 6 of the rotary compression element 3, around the electric element 2 and the electric element. Exit 8 through 2
Emitted from. This discharge valve device 7 is a valve seat 1 provided in a recess 9 of a main frame 6 as shown in FIGS.
0, valve 11, valve retainer 12 and mounting rivet 13.

[0004]

With reference to FIGS. 7 and 8, the deviation of the valve 11 from the valve seat 10 is the width H'of the mounting portion 11a of the valve 11 and the width H of the valve mounting portion 9a of the recess 9. The degree of freedom of rotation is regulated by the gap between and. In order to reduce this degree of freedom, that is, the deviation of the valve 11 from the valve seat 10, it is necessary to reduce the gap, and it becomes necessary to strictly manage the dimensional tolerance of the widths H and H '.
It causes a decrease in productivity.

Further, in the similar example shown in FIG. 9, a protruding recess 14b is provided at the end of the recess 14 on the side of the rivet mounting hole 9b.
The protruding recess 14b is formed at the end of the mounting portion 15a of the valve 15.
The protrusion 15b that engages with the valve 15 is extended, and the rotational displacement regulation dimension 1 (FIG. 8B) of the valve 15 with respect to the mounting rivet 13 (see FIGS. 5 and 6) is 1'as shown in FIG. 9A. Then, the tolerance in the case of FIG. 8 is loosened. However, in this case, the valve becomes large, resulting in an increase in installation space and an increase in valve material cost.

Therefore, there has been a problem that it is necessary to relax the tolerance management and reduce the deviation of the valve from the valve seat without increasing the material cost.

[0007]

According to the present invention, in order to solve the above-mentioned problems, an electric element is housed on the upper side of a closed container and a rotary compression element is housed on the lower side, and the main frame of the rotary compression element is discharged. In a rotary compressor including a valve device, the discharge valve device includes a protrusion projecting into the recess at an end of the recess having a valve seat and a valve mounting part formed in the main frame, on the valve mounting part side. The present invention is intended to provide a rotary compressor in which a concave portion that engages with the protrusion is provided at the end portion on the mounting portion side of the valve.

[0008]

When the valve of the discharge valve device according to the present invention is caulked with the valve retainer together with the valve retainer by the mounting rivet, the valve rotates around the central axis of the rivet and the valve is generated. The gap between the seat and the width h of the protrusion of the depression (Fig. 2
(See (A)), and the dimensional tolerance with respect to the width h'of the valve recess (see FIG. 2B) can be relaxed far more than the dimensional tolerance of the widths H and H'of the conventional FIG. 8 (see FIG. 2B). (1 is larger than 1), the mounting work is easy. Moreover, unlike the case of FIG. 9, it is not necessary to enlarge the size of the valve and the space for the valve mounting portion.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of a rotary compressor according to the present invention will be described below with reference to the drawings. First Embodiment: FIG. 1 is a sectional view of a first embodiment of a rotary compressor provided with a discharge valve device according to the present invention, and FIG.
2 is an enlarged plan view of the recess of the discharge valve device shown in FIG. 2, and FIG. 2B is an enlarged plan view of the valve.

In FIGS. 1 and 2, the same parts as those in FIGS. 4, 5, 6, and 8 are designated by the same reference numerals, and only different points will be described.

As shown in FIGS. 1 and 2, the protrusion 1 is formed at the end of the mounting portion 18a of the recess 18 on the rivet mounting hole 8b side.
8b is provided in the recess, while the end of the mounting portion 19a of the valve 19 is provided with a recess 19b that engages with the projection 18b.

As with the case where the valve 19 is shown in FIGS. 5 and 6,
When caulking the main frame 6 together with the valve retainer 12 by the mounting rivet 13, the valve 19 is provided around the rivet axis.
The deviation caused by the rotation of the valve seat 10 with respect to the valve seat 10 is the distance l from the center of rotation to the position where the projection 18b and the recess 19b contact each other.
Since 1 is much larger than L shown in FIG. 8B, it can be made extremely small, and the valve mounting portion 19a of the valve 19 and the recess 18a, 1
The engagement size control of 8a can be made rough, and the material of the valve 19 is exactly the same as that of the valve 11. Second Embodiment: FIG. 3 is a plan view of a valve according to a second embodiment of the discharge valve device according to the present invention.

In the valve 20 of the second embodiment shown in FIG. 3, the axis of the mounting rivet is made flat, and the rivet mounting hole 20b is made as an elongated hole having two surfaces parallel to the longitudinal direction so that it can be engaged with the flat shaft of the mounting rivet. It was designed to work together.

[0014]

Since the rotary compressor according to the present invention is constructed as described above, it has the following effects. (1) Since the control of the engagement dimension of the valve and the depression in the direction perpendicular to the longitudinal direction of the valve mounting portion and the control of the engagement dimension of the concave portion of the valve and the protrusion of the depression can be roughly performed, productivity improvement is expected. This makes it possible to (2) increase the clearance between the valve and the recess, thereby improving the workability of assembly, and (3) eliminating the need for expanding the valve size and mounting space.

[Brief description of drawings]

FIG. 1 is a sectional view of a first embodiment of a rotary compressor provided with a discharge valve device according to the present invention.

2 (A) is an enlarged plan view of a recess of the discharge valve device shown in FIG. 1, and FIG. 2 (B) is an enlarged plan view of the valve.

FIG. 3 is a plan view of a valve according to a second embodiment of the discharge valve device according to the present invention.

FIG. 4 is a cross-sectional view of a conventional rotary compressor.

5 is an enlarged plan view of the vicinity of the discharge valve device shown in FIG.

6 is a sectional view taken along line AA of FIG.

FIG. 7 is a positional relationship diagram of a valve and a valve seat of the discharge valve device shown in FIGS.

FIG. 8A is an enlarged plan view of the depression shown in FIGS.
(B) is an enlarged plan view of the valve.

FIG. 9 shows another conventional discharge valve device,
(A) is an enlarged plan view of the depression, and (B) is an enlarged plan view of the valve.

[Explanation of symbols]

 1: Airtight container 2: Electric element 3: Rotary compression element 6: Main frame 7: Discharge valve device 10: Valve seat 17: Discharge valve device 18: Recess 18a: Valve mounting portion 18b: Projection portion 19: Valve 19a: Valve mounting Part 19b: recess

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Hitomi Takagi 2-5-5 Keihan Hondori, Moriguchi City, Osaka Sanyo Electric Co., Ltd.

Claims (1)

[Claims] 1. A rotary compressor in which an electric element is housed in an upper side of a hermetic container and a rotary compression element is housed in a lower side thereof, and a discharge valve device is provided in a main frame of the rotary compression element, wherein the discharge valve device is A protrusion projecting into the recess is provided at an end of the recess having a valve seat and a valve mounting portion formed in the main frame on the valve mounting portion side, and the protrusion is engaged with the end of the valve mounting portion side. A rotary compressor, characterized in that it is provided with a recess for fitting.