JPH0353025Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention is based on the mounting structure of the suction filter in a refrigerant compressor, specifically, on the wall forming the suction passage.
The present invention relates to a mounting structure for mounting a suction filter that can be elastically displaced across the suction passage.

(Prior Art) In general, a semi-hermetic refrigerant compressor has a frame containing a compression element and a motor, and a side cover on one side of the frame, on the motor side, which has a refrigerant suction passage formed inside. A suction filter is attached to the suction passage so that the gas refrigerant sucked into the suction passage is supplied to the compression element via the motor, and a suction filter is installed on the suction passage, and the filter leads from the suction passage to the motor side. This removes lubricating oil, dust, etc. that get mixed into the gas refrigerant.

When installing the suction filter, conventionally, as shown in FIG. A locking step 5b is provided on a part of the wall 5a forming the suction passage 5 on the motor 3 side, and has a roughly bowl-shaped cross section and extends radially outward at the open side peripheral edge. An elastically displaceable suction filter 7 provided with a locking portion 7c is formed, and the locking portion 7c of the filter 7 is connected to the wall 5a.
The filter 7 is brought into contact with the locking step portion 5b of the
By fixing the center portion of the filter 7 to a part of the inner wall of the side lid 6 with a fixing bolt B while the filter 7 is elastically deformed in the opposite direction to the side where the locking step portion 5b is formed, the filter 7 is The locking portion 7c of the filter 7 is brought into elastic contact with the locking step portion 5b of the wall 5a, and a seal is formed between the locking step portion 5b and the locking portion 7c of the filter 7.

(Problem to be solved by the invention) By the way, in the above-described mounting structure of the suction filter 7, when starting up the compressor, etc., the suction passage 5
When liquid refrigerant is sucked into the suction filter 7, when a large load is applied to the suction filter 7, the entire filter 7 is largely elastically displaced around the fixing bolt B toward the motor 3, causing the filter 7 to become uncoupled. Stop part 7
c is spaced apart from the locking step 5b of the wall 5a,
This locking step portion 5b and the locking portion 7c of the filter 7
A gap is formed between the refrigerant and the refrigerant, and there is a problem in that dust and the like are sucked into the suction passage 5 together with the refrigerant into the motor 3 side. Furthermore, even during steady operation, if the natural frequency of the filter 7 matches the fundamental frequency of mechanical vibration, it will resonate and generate abnormal noise.
When designing, it was necessary to shift the natural frequency and the fundamental frequency of mechanical vibration to prevent resonance, which was difficult because the design conditions were severe.

The present invention was devised in view of the above problems, and its purpose is to interpose a specific gasket between the peripheral edge of the suction filter and the wall that supports the peripheral edge of the filter. According to
Even if the filter is deformed when a load is applied to it, a gap is prevented from being formed between the peripheral edge of the filter and the wall, thereby preventing dust and the like from being introduced to the motor side. To provide a mounting structure for a suction filter that can reliably prevent the above-mentioned vibrations, absorb vibrations of the filter with the gasket to prevent the generation of abnormal noise, and eliminate the need for setting conditions that take resonance into consideration.

(Means for solving the problem) The present invention, as shown in Figs. 1 and 2,
A suction filter 7 is provided on a wall 5a forming the suction passage 5 and is elastically displaceable across the suction passage 5.
A mounting structure for mounting the filter 7 between the peripheral edge of the filter 7 and the wall 5a.
A ring-shaped gasket 8 having a displacement greater than the maximum elastic displacement at the peripheral edge is interposed so that the filter 7 is attached to the wall 5a and the gasket 8 is within the range of the maximum elastic displacement at the peripheral edge. It is characterized by being attached by bending it.

(Function) Even if the peripheral edge of the filter 7 is elastically displaced when a load is applied to the filter 7, such as when the compressor is started, this peripheral edge and the wall 5a supporting the peripheral edge may In between, there is a gasket 8 having a displacement greater than the maximum elastic displacement of the peripheral portion,
Because it is inserted in a compressed and deformed state,
There is no gap between the peripheral edge and the wall 5a, and therefore it is possible to reliably prevent dust from being introduced from the suction passage 5 to the motor side. Since the gasket 8 acts as a buffer material, it is possible to prevent the generation of abnormal noise, and the design condition of shifting the natural frequency of the filter 7 from the fundamental frequency of mechanical vibration becomes unnecessary.

(Example) The mounting structure of a suction filter in a refrigerant compressor of the present invention will be described below with reference to an example shown in the drawings.

FIG. 1 shows a semi-hermetic compressor, in which a compression element 2 is placed on one side in the length direction of a horizontally elongated frame 1.
Also, a motor 3 is installed internally on the other side in the length direction, and the motor 3 and the compression element 2 are interlocked and connected via the crankshaft 4, and a motor 3 is installed inside the frame 1 on the motor 3 side. A side cover 6 forming a suction passage 5 is attached, and the gas refrigerant sucked into the suction passage 5 is supplied to the compression element 2 via the motor 3 and compressed in the compression element 2.

In addition, a suction filter 7 that can be elastically displaced across the suction passage 5 is attached to the suction passage 5 of the side cover 6, and this suction filter 7 prevents the gas refrigerant from flowing from the suction passage 5 to the motor 3 side. This system separates and removes lubricating oil, dust, etc. that may be mixed in.

The suction filter 7 has a plurality of filter bodies 7b made of a bottomed cylindrical net-like material on the inside of an elastically displaceable support 7a having a roughly arm-shaped cross section.
An annular locking portion 7 is integrally attached with its opening open to the suction passage 5, and extends radially outward on the peripheral edge of the opening side of the support 7a.
c.

A ring-shaped locking step 5b is provided on the motor 3 side of a part of the wall 5a forming the suction passage 5 of the side cover 6, and the locking step 5b is formed as described above. With the locking portion 7c of the filter 7 in contact and the support 7a of the filter 7 being elastically deformed in the opposite direction to the side where the locking step portion 5b is formed, the central portion of the support 7a is By fixing to a part of the inner wall of the side cover 6 with a fixing bolt B, the locking part 7c of the filter 7 is fixed to a part of the inner wall of the side cover 6.
The locking step 5b is brought into elastic contact with the locking step 5b to seal between the locking step 5b and the locking portion 7a.

Therefore, in the above-described mounting structure of the suction filter 7, the maximum elastic displacement at the locking portion 7c of the filter 7 is between the locking portion 7c of the filter 7 and the locking step portion 5b of the wall 5a. A ring-shaped gasket 8 made of an elastic member having a displacement greater than the amount of displacement is interposed, and the filter 7 is attached to the wall 5.
A, the gasket 8 was attached in a state where it was bent more than the maximum elastic displacement of the locking portion 7c.

Specifically, as shown in detail in FIG. 2, when the maximum elastic displacement of the locking portion 7c of the suction filter 7 is, for example, T, the elastic displacement of the gasket 8 is the maximum elastic displacement of the locking portion 7c. setting the displacement amount T to be larger than the displacement amount T, and bending the gasket 8 by more than the maximum displacement amount T at the locking portion 7c;
In other words, it is compressed and deformed in advance so that it has a thickness of t,
It is interposed between the locking portion 7c of the filter 7 and the locking step portion 5b of the wall 5a.

By doing so, liquid refrigerant or the like is sucked into the suction passage 5 when the compressor is started, and a large load is applied to the filter body 7b of the suction filter 7 due to the suction of the liquid refrigerant, and the support body 7a is is elastically deformed toward the motor 3 side around the fixing bolt B, and as a result, the locking portion 7c of the filter 7 locks the wall 5a as shown by the imaginary line in FIG. Even if the filter 7 is elastically deformed in the direction away from the stepped portion 5b,
The gasket 8 is disposed between the locking portion 7c and the locking step portion 5b of the wall 5a, and the gasket 8 is set to have a displacement greater than or equal to the maximum elastic displacement T in the locking portion 7c.
However, since the thickness is restored to the thickness t plus the maximum elastic displacement amount T, a gap will not occur between the locking portion 7c and the locking step portion 5b. It is.

Furthermore, the locking portion 7c of the filter 7 and the wall body 5
Since the gasket 8, which is elastically displaceable, is interposed between the gasket 8 and the
acts as a buffer material and can reliably absorb the vibrations of the filter 7, so it is possible to eliminate the design condition of shifting the natural frequency of the filter 7 and the fundamental frequency of mechanical vibration from each other.

In the semi-hermetic compressor shown in FIG. 1, the compression element 2 includes a plurality of cylinders 21 formed inside the frame 1, and a piston 22 provided in each cylinder 21 so as to be movable forward and backward, A connecting rod 23 is connected between each piston 22 and the crankshaft 4.
The refrigerant is compressed inside the cylinder 21 by moving the piston 22 forward and backward within the cylinder 21 with the rotation of the crankshaft 4.

(Effects of the Invention) As explained above, according to the present invention, in the mounting structure in which the suction filter 7, which is elastically displaceable across the suction passage 5, is attached to the wall 5a forming the suction passage 5, the filter 7 A ring-shaped gasket 8 having a displacement greater than the maximum elastic displacement at the peripheral edge of the filter 7 is interposed between the peripheral edge of the filter 7 and the wall 5a.
Since the gasket 8 is attached to the wall 5a by being bent within the range of the maximum elastic displacement of the peripheral edge, liquid refrigerant or the like is sucked into the suction passage 5 when the compressor is started, etc. Therefore, even if the peripheral edge part is separated from the wall body 5a, the gasket 8 can prevent a gap from forming between the wall body 5a and the peripheral edge part, This makes it possible to reliably prevent dust from being introduced into the motor side from the suction passage 5.

Furthermore, since the gasket 8 serves as a buffer material, it is possible to prevent the filter 7 from generating abnormal noise, and there is no need to consider resonance when designing the filter 7.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a semi-hermetic compressor showing a suction filter mounting structure according to the present invention, FIG. 2 is an enlarged sectional view of the same essential parts, and FIG. 3 is a sectional view of a conventional example. 5...Suction passage, 5a...Wall body, 7...Suction filter, 8...Gasket.

Claims (1)

[Scope of utility model registration request] This is a mounting structure in which a suction filter 7 that can be elastically displaced across the suction passage 5 is attached to a wall 5a forming the suction passage 5, and the suction filter 7 is
A ring-shaped gasket 8 having a displacement greater than the maximum elastic displacement at the peripheral edge of the filter 7 is interposed between the peripheral edge of the filter 7 and the wall 5a, and the filter 7 is attached to the wall 5a. , the gasket 8
A structure for mounting a suction filter in a refrigerant compressor, characterized in that the suction filter is bent by more than the maximum elastic displacement of the peripheral portion.