JPH04353274A - Sealed type compressor - Google Patents

Abstract

PURPOSE:To obtain a compressor with little noise at the time of start stop by suppressing noise of a sealed compressor used in a refrigerator or the like due to Teflon coating of a coil spring. CONSTITUTION:In an internal support means, both ends of snubbers 33, 34 joining with seat members 31, 32 provided in a compressor body 2 and a casing 1 respectively, are fixed at upper ends 50a, 50b respectively, of a Teflon coated coil spring 20 so as to support them elastically.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hermetic compressor used in refrigeration equipment such as refrigerator-freezers and showcases.

0002

[Background Art] In recent years, there has been an increasing demand for lower noise levels for hermetic compressors, and there is a need for ways to reduce not only the noise generated during operation, but also the noise generated when starting and stopping. . Conventional support devices for hermetic compressors are disclosed in Japanese Utility Model Application Publication No. 58-177567 and Japanese Utility Model Application Publication No. 177567.
-66279 Publication, Utility Model Application Publication No. 1984-159789, Publication No. 165981-1981, Publication No. 1987-165981, Publication No. 1987-165981, Publication No. 49-54
No. 106, Japanese Utility Model Publication No. 54-22211, Japanese Utility Model Publication No. 1-33826, etc. all propose structures that elastically support the compressor main body using coil springs.

A conventional internal support device for a hermetic compressor will be described below with reference to the drawings.

As a conventional example, FIGS. 4 and 5 show the
In the internal support device of a hermetic compressor shown in Publication No. 177567, 1 is a casing, 2 is a compressor body, and 3
is a support device. Reference numeral 5 denotes a seat provided on the casing 1 and the compressor main body 2, with a coil spring 4 interposed between them. , it has a close fitting part 9 which is a tight fit with the coil spring 4, and a part formed with a small diameter so that the coil spring 4 is a loose fitting part 8 which is a loose fit. Reference numeral 10 denotes a part of the coil spring 4, which normally does not come into contact with the snubber 6.

FIG. 6 shows a support device for a hermetic compressor shown in Japanese Utility Model Application Publication No. 49-54106, in which 11 is a casing, 12 is a lower mounting plate provided on the casing 11, and 13 is a lower mounting plate. It is connected to the lower mounting plate 12 by a snubber. Reference numeral 14 denotes an upper seat part, which is provided in the compressor main body (not shown), and 15, an upper snubber, which is connected to the upper seat part 14. A coil spring 16 is fixed to the upper and lower snubbers 15 and 13. 17 is a space washer, at least the outer periphery of which is formed of an elastic buffer, and the lower end of the coil spring 16 and the lower mounting plate 12
is sandwiched between.

FIG. 7 is an enlarged sectional view of a main part of a support device for a hermetic compressor disclosed in Japanese Utility Model Publication No. 1-33826, in which 20 is an upper snubber and 21 is a lower snubber. 22 is a coil spring. A bush 23 is integrally formed of synthetic resin, and its shape is press-fitted into the upper part of the coil spring 22 and the flange 23a that comes into contact with a seat (not shown) provided on the compressor body (not shown). It consists of a cylindrical portion 23b that is inserted into the upper snubber 20, and a cylindrical hole 23c that is inserted into the upper snubber 20.

The inner diameter of the cylindrical hole 23c is the same as that of the upper snubber 2.
It has a diameter larger than the outer diameter of 0, making it easier to assemble. The lower end of the coil spring 22 is fixed to the lower snubber 20.

[0008]

[Problems to be Solved by the Invention] However, in the above-mentioned configuration, the collision between the coil spring 4 and the snubber 6, especially the collision between the coil spring 4 and the movement due to the inertial force during starting and stopping of the compressor body 2, is a problem. The lateral movement due to inertia of the portion 10 near the snubber 6 causes a collision with the snubber 6, and the movement of the restoring force of the coil spring is also added, resulting in repeated left and right collisions.

[0009] Furthermore, the portion 8 that is a loose fit is
Due to this clearance, contact and rubbing occur between the seat surface of the seat portion 5 and the snubber 6 during starting and stopping. These collisions, contacts, and scrapes have the problem of generating noise.

In addition, in the case of the conventional example shown in FIG. 6, the coil spring 16 and the lower mounting are used for the elastic buffer of the lower space washer 17 in order to prevent the noise at the time of starting and stopping mentioned in the above-mentioned conventional example. This is an improvement since the contact noise of the plate 12 with the seat surface is reduced, but the contact between the coil spring 16 and the lower snubber 13 remains, so it is not a fundamental improvement, and the work of inserting the space washer 17 is not achieved. Additionally, it is necessary to add additional parts, resulting in an increase in cost.

Furthermore, in the upper snubber 15 provided at the upper end of the coil spring 16 and the compressor body, inserting the space washer 17 is difficult and impractical, and the method shown in FIG. It had the problem of being limited.

Furthermore, in the conventional example shown in FIG. 7, since the inner diameter of the cylindrical hole 23c of the bushing 23 is larger than the outer diameter of the upper snubber 20, a gap (24 in the figure) is created. Due to this gap, collision between the upper snubber 20 and the bush 23 occurs due to the movement of the compressor main body when starting and stopping.
Not only does it generate noise, but depending on the frequency of starting and stopping during long-term operation, the reliability of the synthetic resin bushing 23 is affected by wear and the like.

[0013] Also, by reducing this gap, the bush 23
Press-fitting the snubber into the snubber 20 makes workability difficult. Also, like the second conventional example, the bush 23
This also increases the cost of parts and work.

[0014] Although the improvement effect is recognized as described above,
It is clear that the issues mentioned above still remain.

In view of the above-mentioned problems, the present invention provides an inexpensive and highly reliable internal support device for a hermetic compressor, which reduces the noise generated by movement due to inertial force when the compressor main body starts and stops. It is something to do.

[0016]

[Means for Solving the Problems] In order to solve the above-mentioned problems, a support device for a hermetic compressor of the present invention includes a compressor main body, a casing that houses the compressor main body, and a compressor main body that accommodates the compressor main body. a support device for elastic support within the casing; the support device includes a seat provided on each of the compressor main body and the casing; a snubber portion connected to the seat; and a support device provided at both ends of the seat and the snubber portion. a Teflon-coated coil spring with fixed snubber parts, at least one of the snubber parts has a cylindrical root part protruding from the seat part, a cylindrical base part connected to the root part, and a cylindrical base part connected to the base part. and a tapered part whose diameter is smaller toward the tip end, and the diameter of the cylinder at the root part is smaller than the diameter of the cylinder at the base part, and the Teflon coating is applied to the side to be fixed to the seat part and the snubber part. a side that is smaller than the inner diameter of the end of the coil spring, has a height of the base smaller than the wire diameter of the Teflon-coated coil spring, and fixes the diameter of the cylinder of the base to the seat and the snubber part; The inner diameter of the Teflon-coated coil spring is larger than that of the end of the coil spring, and the spring is tightly fitted at the edge on the root side of the base.

[0017]

[Operation] According to the present invention, the Teflon-coated end of the coil spring enters between the root portion of the snubber portion and the seat surface and is fixed. The diameter of the root of the snubber is smaller than the diameter of the base, so even if the Teflon-coated coil spring end generates a pulling force toward the snubber tip, its movement will be restricted. It's pressed against the surface.

In other words, the movement due to inertia that occurs when the compressor body starts and stops is transmitted to the Teflon-coated coil spring and moves the Teflon-coated coil spring, but the Teflon-coated coil spring end is securely fixed and moves. There is no.

[0019] Also, even if it moves, and even if the Teflon-coated coil spring end collides with the seat surface or the Teflon-coated coil spring end rubs against the snubber part, no sound will be generated in this part. .

Furthermore, since one turn of the Teflon-coated coil spring end is tightly fitted to the snubber, no sound is generated even if the Teflon-coated coil spring end comes into contact with the snubber.

Since the snubber part has a tapered shape, the diameter of which becomes smaller toward the tip, the gap between the snubber part and the outer periphery gradually increases from the second turn onward from the Teflon-coated end of the coil spring.

Furthermore, since the diameter of the second turn of the Teflon-coated coil spring end is larger than that of the first turn, a sufficient clearance between the second turn and the snubber portion can be obtained.

[0023] Also, the compressor body moves due to inertia generated when starting and stopping, and the Teflon-coated coil spring also moves, but there is sufficient clearance as mentioned above from the second turn of the Teflon-coated coil spring. , it will not collide with the snubber, and even if it collides with the snubber, the coil spring is coated with Teflon, so it will not make any noise.

[0024]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A compressor according to an embodiment of the present invention will be described below with reference to the drawings. Note that parts that are the same as those in the conventional example will be described using the same reference numerals, and parts that are the same in structure and operation will be omitted.

In FIGS. 1, 2, and 3, 1 is a casing, 2 is a compressor main body, 3 is an internal support device, 31 is a seat of the compressor main body 2, 32 is a seat of the casing 1, and 33 is a compressor. 34 is a snubber portion of the machine body 2, 34 is a snubber portion of the casing 1, 34a is a base portion, 34b is a base portion, 34c is a tapered portion, and 50 is a Teflon-coated coil spring. 50a is the upper end of the coil spring coated with Teflon, and 50b is the lower end of the coil spring coated with Teflon.

Seats 31 and 32 provided on the casing 1 and the compressor body 2 are provided with snubber portions 33 and 34, respectively, into which a Teflon-coated coil spring 50 is inserted and fixed.

The shape of the snubber portion 34 is composed of a cylindrical base portion 34a protruding from the seat portion 32, a cylindrical seat portion 34b, and a tapered portion 34c whose diameter decreases toward the tip end.

The diameter of the cylindrical portion of the base portion 34a is smaller than that of the cylindrical portion of the base portion 34b, and smaller than the wire diameter of the Teflon-coated coil spring 50. Also, the base 34b
The diameter of the cylinder is larger than the inner diameter of the lower end portion 50b of the Teflon-coated coil spring 50.

In the above structure, both ends 50a and 50b of the Teflon-coated coil spring 50 are fixed to the snubber parts 33 and 34, respectively, to elastically support the compressor body.

Due to the above-mentioned dimensional relationship, the lower end portion 50b of the Teflon-coated coil spring is fixed by being inserted into the gap between the base portion 34a sandwiched between the edge of the base portion 34b of the seat portion 32 and the snubber portion 34. It will be done.

Therefore, the lower end 50b of the Teflon-coated coil spring 50 does not move due to movement due to inertia that occurs when the compressor main body starts and stops, so collision between the Teflon-coated lower end 50b of the coil spring and the seat is prevented. Sound and snubber section 34
and Teflon coated coil spring lower end 5
Since the rubbing noise of 0b is not generated, the noise generated when starting and stopping the compressor main body can be reduced.

The material of the snubber 34 may be the same as the conventional one, and since the Teflon-coated coil spring 50 is made of synthetic resin, there will be no collision noise even if it rubs due to contact or if there is a collision with the seat, so it will be easier to use when starting and The effect can be improved by reducing the noise generated when stopping.

[0033]

Effects of the Invention As described above, the present invention comprises a seat provided on each of the compressor body and casing, a snubber section connected to the seat, and a Teflon-coated coil with both ends fixed to the seat and snubber section, respectively. At least one of the snubber parts includes a cylindrical root part protruding from the seat part, a cylindrical base part connected to the root part, and a tapered part connected to the base part and formed with a diameter smaller toward the tip end. The diameter of the cylinder at the base is smaller than the diameter of the cylinder at the base, and smaller than the inner diameter of the end of the Teflon-coated coil spring that is fixed to the seat and snubber part, and the height of the cylinder at the base is smaller than the diameter of the cylinder at the base. The diameter of the cylinder at the base is smaller than the wire diameter of the Teflon-coated coil spring, and the diameter of the cylinder at the base is larger than the inner diameter of the end of the Teflon-coated coil spring that is fixed to the seat and snubber. By making a tight fit at the edge of the snubber, the end of the Teflon-coated coil spring is sandwiched between the edges of the base of the seat and snubber, and is fixed by being inserted into the gap at the base. The Teflon-coated coil spring end does not move, and there is no collision noise between the Teflon-coated coil spring end and the seat or rubbing noise with the snubber, reducing noise generated when the compressor body starts and stops. Can be done.

[0034] The compressor body and the casing each include a seat section, a snubber section connected to the seat section, and a Teflon-coated coil spring with both ends fixed to the seat section and the snubber section, respectively. The coil spring has a coil spring in which the inner diameter of one turn at at least one end is smaller than the inner diameter of the second turn, and the snubber part on the side that fixes the end is connected to a cylindrical base protruding from the seat part. , consisting of a tapered part connected to the base and formed to have a smaller diameter toward the distal end, or a tapered part that protrudes from the seat and becomes smaller in diameter toward the distal end,
One turn that is smaller than the inner diameter of the end of the Teflon-coated coil spring is an interference fit, and the second and subsequent turns have a gap between the base and the tapered part, so the end of the Teflon-coated coil spring has a tight fit. The first roll is fixed with an interference fit, and the second and subsequent rolls create a space with the snubber part, which eliminates the noise caused by collision, reducing the noise generated when the compressor body starts and stops. .

[Brief explanation of drawings]

FIG. 1 is a sectional view of a support device for a hermetic compressor according to the present invention.

[Figure 2] Enlarged sectional view of main parts in Figure 1

[Fig. 3] Enlarged cross-sectional view of the Teflon-coated coil spring of the present invention

[Fig. 4] A cross-sectional view showing a support device for a conventional hermetic compressor.

[
Figure 5: Enlarged sectional view of main parts of the hermetic compressor in Figure 4

[Fig. 6] A sectional view of the main parts of a hermetic compressor showing another conventional example.

[Figure 7] Cross-sectional view of the main parts of another hermetic compressor equivalent to Figure 6

[Explanation of symbols]

1 Casing 2 Compressor body 3 Internal support device 31 Seat part 32 Seat part 33 Snubber part 34 Snubber part 34a Root part 34b base 34c Taper part 50 Coil spring 50a Upper end 50b Lower end

Claims (1)

[Claims] 1. A compressor main body, a casing that houses the compressor main body, and an internal support device that elastically supports the compressor main body within the casing, the internal support device being provided in the compressor main body. a seat portion provided on each of the casings, a snubber portion connected to the seat portion provided on the compressor main body, and an upper end portion having both ends fixed to the seat portion and the snubber portion provided on the casing, respectively. and a Teflon-coated coil spring consisting of a lower end portion, at least one of the snubber portions has a cylindrical root portion protruding from the seat portion, a cylindrical base portion connected to the root portion, and a cylindrical root portion connected to the base portion. and a tapered part whose diameter is smaller toward the tip end, the diameter of the cylinder at the base part being smaller than the diameter of the cylinder at the base part, and the Teflon coating on the side fixed to the seat part and the snubber part. a side that is smaller than the inner diameter of the end of the coil spring, has a height of the base smaller than the wire diameter of the Teflon-coated coil spring, and fixes the diameter of the cylinder of the base to the seat and the snubber part; A Teflon-coated coil spring having an upper end portion and a lower end portion, the inner diameter of which is larger than the inner diameter of the end portion of the Teflon-coated coil spring, and which are tightly fitted at the edge on the root side of the base. The hermetic compressor used.