CN2307924Y

CN2307924Y - Improved silencer for refrigerator compressor

Info

Publication number: CN2307924Y
Application number: CN 97209728
Authority: CN
Inventors: 弗兰科·费格贾尼; 马西姆·里戈
Original assignee: Zanussi Elettromeccanica SpA
Current assignee: ACC Compressors SpA
Priority date: 1996-03-07
Filing date: 1997-02-27
Publication date: 1999-02-17
Anticipated expiration: 2007-02-27
Also published as: IT241549Y1; ITPN960014U1

Abstract

The utility model relates to a muffler of a motor compressor, which is composed of three separated chambers. Refrigeration air flow passes through the three separated chambers in order. The three separated chambers are separated by a first and a second clapboards; openings used as air passages are arranged in the clapboards. The first chamber is provided with an air inlet pipe; the third chamber is provided with an outlet pipe which can convey air into an air inlet door. The opening between the first chamber and the second chamber is positioned on the crosswise section of the clapboards and is abutted with a zone of the wall of the muffler; the zone is arranged at the vicinity of an inlet of the air inlet pipe. An opening of the air inlet pipe which can enter the muffler faces on the first chamber and a wall corresponding to the opening of the clapboard which is arranged between the first chamber and the second chamber.

Description

The baffler that improved freezer compressor is used

The utility model relates to the baffler that a kind of improved freezer compressor is used, and it comprises the suction tude of special shape, and suction tude is carried refrigerant gas by a seal container, be packaged with a motor in the container, and it is widely used in the domestic refrigerating appts.

In order to be illustrated more clearly in the utility model, to suppose that the work of this suction tude and compressor are closely related, and make by pressure injection or molded plastic.However, do like this and do not mean that certainly this model utility only limits to this type of material and this correlation.

Being particularly useful for the guanidine of positive displacement compressor internal gas pressure of civilian refrigerator moving is a very important problem, influences the size that efficient and compressor send volume because this guanidine is moving.Enter the inside of the airtight casing of compressor at last from the refrigerant gas of sucking pipe.

Compressor body comprises the sucking pipe and some chambers that link to each other with valve through a plurality of passages in the casing the inside, and the gas of suction is sent into cylinder through these chambers.

Because the hot surfaces all with compressor contact, so gas heating and the decline of its density in these passages.

This just causes the filling that reduces cylinder, and thereby its final result be the refrigerating capacity that reduces compressor.

In the applicant's european patent application 93104357, basic mechanism that the control gaseous motion-promotion force is learned and prior art more generally have been described, for for simplicity with reference to above-mentioned patent application, and the utility model has been made improvement to it.

Be subjected to regulations restrict or ecological reason, in fact must use refrigerant R134a and R600a, rather than traditional refrigeration agent R12, do like this and bring following shortcoming: R134a to be operated in, thereby cause a kind of compressor of strong noise than under the much higher working pressure of R12; The refrigerating capacity of R600a is relatively poor, thereby, typically compare with those characteristics that light duty compressor provided with traditional liquid R12 work, what it gave is relatively poor characteristic.

Yet light duty compressor produces lower noise, this means, the normal compressor that is used for identical refrigerating capacity of working from R600a just bigger noise can take place.

The common conclusion that these situations draw is that further the noise level of these compressors of inhibition is reduced to noise and the similar level of traditional compressor, will be conceived to final refrigeration work consumption all the time certainly.

Therefore requirement also is a purpose of this utility model, and the baffler that provides a kind of improved freezer compressor to use makes compressor have the remarkable noise level that reduces under the high efficiency situation.And it is that material and method reliable, economical and that be easy to allow to use with prior art combine.

This purpose is by reaching by means of the non-limiting equipment of giving an example of the conduct of description of drawings.Accompanying drawing comprises:

Fig. 1 is contained in the interior views by baffler part of the present utility model between device air-breathing outside compressor and the cylinder head;

The interior views of this same baffler complimentary body of Fig. 2;

The side view of Fig. 3 part shown in Figure 1;

The side view of Fig. 4 part shown in Figure 2;

Fig. 5 is substantially by the sectional view of part central authorities shown in Figure 1 on section plane A-A, but the following represented part of having taken away; And

Among Fig. 6 Fig. 1 along the amplification profile diagram of section plane B-B by different parts.

Basic ideas of the present utility model are as follows: as touching upon in the patent document, enter the gas of compressor from suction tude, before being inhaled into the sucking pipe that is present in the compressor body, by casing diffusion, but under the situation that does not allow to spread directly by " interception " and the cylinder head that leads.

For this purpose, a kind of baffler of particular design is applicable to the pilot gas flow process, and on the one hand gas is entered the surrounding area, feeding hole of casing and couple together with the suction port that gas on the other hand imports cylinder head.The idiographic flow of gas flow with appointment separated, and the purpose that reaches is to prevent gas superheat, and suppresses by above-mentioned pipeline the noise when air-breathing.

Make comparisons with disclosed baffler in the above-mentioned patent document, baffler resemblance of the present invention resembles the shape of L very much, include expansion chamber in wherein long-armed, galianconism then leads to the helmholtz resonance device, its flange is positioned at contiguous intake valve on the outer pipe of baffler, and also near the hole of leading to the compressor intake valve.

In baffler inside, the propagation of sound wave is interfered and reflects, and these phenomenons have weakened the intensity of sound.

But basic difference is then based on the following fact, promptly, above-mentioned expansion chamber is made up of three chambers that separate, and the cooling flow sequential flow is crossed them, and these three chambers are used dividing plate 9 successively, 10 is separated from each other, suitable mouth as gas channel is arranged in the dividing plate, wherein, first and second Room be included in above-mentioned long-armed in, the first indoor suction tude that is equipped with, the 3rd Room is made up of the outer pipe of gas being transported to intake valve.

The air suction silencer that is connected with compressor cylinder cover is made up of the supporting part 1 and 2 that is illustrated respectively among Fig. 1 and 2.

This baffler is contained in the compressor case inner chamber and gas is imported between the sucking pipe in the cylinder head (not shown), it is designed to L shaped basically, L shaped is long-armed, its central authorities expand into some and resemble box, comprise two

expansion chambers

3,4, and the throttling of galianconism has formed the 3rd Room 5, the inlet 6 that the 3rd Room 5 at first leads to the helmholtz resonance device leads to the outlet 7 that gas is carried from this chamber towards intake valve then.

Suction tude 8 in first expansion chamber is straight basically, and is parallel to dividing plate 9, the second that first Room and second Room are separated and then separates by their dividing plate 10 with the 3rd Room.

The above-mentioned type but different internal structure is arranged and the baffler detailed experiments chamber evidence of dimension scale, many types to baffler have some common characteristic, when using respectively or use different mutually combinations, they have improved and have made and have been more prone to obtain the desired anti noise that suppresses better.

As mentioned above, these characteristics at first are that means are found by experiment, so here will be only based on accompanying drawing and remaining this explanation to their explanation, this explanation only plans to illustrate a kind of accompanying drawing of most preferred embodiment, the general knowledge that does not relate to the Science and Technology aspect, in any case these general knowledge are all within suitable technology and mathematical knowledge scope that this professional technique practician grasps.

Found following characteristics substantially, they separately or appropriate combination make baffler produce significant erasure effect:

A) have only a mouth 11 in the dividing plate between first and second Room, it is positioned on the lateral part of this dividing plate, and with a regional adjacency of noise reduction wall 13, this zone is near the import 14 of the suction tude 8 of gas being imported baffler;

B) best above-mentioned suction tude 8 is straight, and the dividing plate 9 that is parallel between first Room 3 and second Room 4 extends;

C) in the length of the suction tude 8 of first chamber interior between 25 and 35 millimeters;

D) suction tude feeds the import 25 of baffler, towards that relative wall 15 of the mouth 11 with in the dividing plate 9 between first and second Room of first Room;

E) passage between second Room 4 and the 3rd Room 5 is provided by pipe 16, in pipe 16 dividing plates 10 that are inserted between the second and the 3rd Room, and in this dividing plate both sides extension;

F) pipe 16 is unique passages of gas between the second and the 3rd Room, and the length of pipe 16 parts is between 35 and 55 millimeters in second Room;

G) intakeport 17 that is included in second indoor pipe 16 parts expands outwardly flue;

H) pipe 16 is columniform or is made up of two arrangements cylindrical section at angle, and the internal diameter that makes the pipe 16 that interconnects between the second and the 3rd Room is between 5 and 8 millimeters;

I) in order pipe 16 to be installed in be formed in the hole 18 that is fit on the dividing plate 10, pipe 16 has the semi-ring 19 of a protrusion on its outer surface, and is designed to and 20 engagements of a fixing retained part, and retained part 20 is close to second partition near pipe 16.The mutual size and the geometrical shape of described these parts are designed to like this, promptly, make it an end 21 of pipe 16 is inserted in the hole 18 of dividing plate 10, then, swinging head 16, between semi-ring 19 and retained part 20, form a clamping-type engagement, make the remaining part of pipe 16 be in top b basically) in determined state;

L) in a zone of the 3rd locular wall, this zone the inlet 6 of helmholtz resonance device and with gas between the exit orifice 7 of baffler input intake valve, a plurality of steps of arranging transverse to the radial direction of this gas outlet hole 7 22 are arranged;

M) respectively there are a pair of

relative planomural

26,27 and 26a in first and second Room, 27a, and they are substantially parallel to each other, and the axis and the axis that is parallel to suction tude 8 that are in substantially parallel relationship to the pipe 16 between the second and the 3rd Room;

N) for guaranteeing that preceding two the chamber volumes of frequency range from 500 to 630Hz correctly are coupled, find the ratio between the maximum height (that is along substantially perpendicular to Inner Dimension of the chamber of pipe 16 directions) of preceding two chambers, must be between 1.2 and 1.5 to 1, wherein second Room is than the first Room height.

Also can find out referring to accompanying drawing, dividing plate 9 is made one with the part 2 of baffler, when part 1 and 2 when closed together, the outward edge 28 of dividing plate 9 is embedded in the groove 29 in the part 1 automatically, and this groove 29 is made of two parallel projectioies 30 on part 1 internal surface.

In an adiabatic change, carry out (thereby refrigerating efficiency of assurance compressor) for keeping air-breathing, the most handy plastics manufacturing of baffler.

Should be appreciated that referring to the illustrated and represented content of accompanying drawing, provide purely the present invention is described as an example, can make many variations and modification to them without departing from the invention.

Claims

1. baffler (1 that improved freezer compressor is used, 2), it is implemented in the function that reduces noise level in the adiabatic change, baffler is contained in the compressor case inner chamber and gas is imported between the sucking pipe in the cylinder head, it is L shaped that above-mentioned baffler is designed to be essentially, L shaped the suction tude (8) of gas being imported this baffler is housed in long-armed, and galianconism at first feeds the inlet (6) of helmholtz resonance device, feed the outlet (7) that gas is carried towards intake valve then, it is characterized in that: described baffler (1,2) is made up of three chambers that separate, i.e. first Room (3), second Room (4) and the 3rd Room (5), the cooling flow sequential flow is crossed them, and these three chambers use dividing plate (9,10) separated from each other successively, dividing plate (9, suitable mouth and/or hole (11,18) as gas channel are arranged, wherein 10), first and second Room are included in baffler long-armed, and the first indoor suction tude (8) that is equipped with.

2. according to the described baffler of claim 1, it is characterized by: have only a mouth (11) in the dividing plate between first and second chamber (9), it is positioned on the lateral part of this dividing plate, and with a regional adjacency of noise reduction wall (13), this zone is near the import (14) of suction tude (8).

3. according to the described baffler of claim 2, it is characterized by: suction tude (8) is straight, and the dividing plate (9) that is parallel between first and second Room extends.

4. according to the described baffler of claim 3, it is characterized by: in the length of the first indoor suction tude (8) between 25 to 35 millimeters.

5. according to the described baffler of claim 4, it is characterized by: suction tude feeds the import of baffler, mouth (11) relative that wall (15) in first Room and the dividing plates between first and second Room (9).

6. according to any one described baffler of claim 3 to 5, it is characterized by: the passage between the second and the 3rd Room is provided by pipe (16), in the hole (18) in the dividing plate (10) of pipe (16) insertion between the second and the 3rd Room, and in the extension of the both sides of this dividing plate.

7. according to the described baffler of claim 6, it is characterized by: pipe (16) is the unique passage of gas between the second and the 3rd Room, and the length of pipe (16) is between 35 and 55 millimeters in second Room.

8. according to the described baffler of claim 7, it is characterized by: the intakeport (17) at the second indoor pipe (16) expands outwardly flue.

9. according to the described baffler of claim 6, it is characterized by: the internal diameter of the pipe in second Room (16) is between 5 and 8 millimeters.

10. according to the described baffler of claim 6, it is characterized by: the semi-ring (19) that a protrusion is arranged on its outer surface at the second indoor pipe (16), wherein, the contiguous second partition (10) of a fixing retained part (20), this pipe are connected with bayonet socket between the retained part (20) by semi-ring and pass this dividing plate suitably.

11. according to the described baffler of claim 1, it is characterized by: be positioned at the inlet (6) of above-mentioned helmholtz resonance device and gas imported the zone between mouthful (7) of infeeding of intake valve of the 3rd locular wall, a plurality of steps (22) that radially are provided with transverse to mouth (7) are arranged.

12. according to the described baffler of claim 6, it is characterized by: respectively there is a pair of relative planomural (26 first and second Room, 27) (26a, 27a), they are substantially parallel, and be in substantially parallel relationship to axis as the pipe (16) of gas channel between the second and the 3rd Room, and, be parallel to the axis of suction tude (8).

13., it is characterized in that according to the described baffler of claim 12: the height of second Room, i.e. the distance between wall 26a and the 27a and the first Room height, i.e. the ratio of the distance between the wall 26 and 27 is between 1.2 and 1.5 to 1.