CN102720654B - Inspiratory silencer of refrigeration compressor - Google Patents

Abstract

An inspiratory silencer of a refrigeration compressor belongs to fittings of the refrigeration compressor. The inspiratory silencer comprises a main shell and a shell cover, wherein the main shell is provided with an inspiratory cavity of the main shell, an air inlet of the main shell, a silencer chamber of the main shell, an air outlet port of the main shell and a filter screen; the shell cover is provided with an inspiratory cavity of the shell cover and a silencer chamber of the shell cover. The inspiratory silencer is characterized in that a pair of clamp plates is formed in the silencer chamber of the main shell, a plate inserting slot is formed between the pair of the clamp plates, a transition breather pipe and an air leading pipe are formed in an upper silencer chamber of the main shell, and a breather pipe of the main shell is formed in a lower silencer chamber of the main shell; a plug plate is formed in the silencer chamber of the shell cover, the plug plate is inserted into the plate inserting slot, an air inlet pipe of the shell cover is formed in the upper silencer chamber of the shell cover, an air outlet pipe of the shell cover is formed in the lower silencer chamber of the shell cover, and liquid discharge holes are opened in the wall of the air inlet pipe of the shell cover and at the bottom of the inspiratory cavity of the main shell. The inspiratory silencer has advantages that the upper and the lower silencer chambers are enlarged and the route of the whole inspiratory pipe is long so as to reduce inspiratory resistance of the inspiratory pipe to facilitate the efficient operation of the refrigeration compressor; and the inspiratory silencer plays the role of protecting an air cylinder.

Description

The air suction silencer of refrigeration compressor

Technical field

the invention belongs to refrigeration compressor accessory technical field, be specifically related to a kind of air suction silencer of refrigeration compressor.

Background technique

as the industry's knowledge of the reason; hermetically sealed refrigerating compressor unit conventionally within it portion an air suction silencer is installed; during refrigeration compressor work, cylinder sucks refrigerant gas by air suction silencer; by air suction silencer, both played the heat effect of refrigeration agent while weakening compressor inner heat; play again and reduce the noise and vibration that in refrigerant gas flow process, pressure pulsation causes; thereby contribute to reduce the running noises of compressor; can effectively improve the working efficiency of compressor, improve the Energy Efficiency Ratio (COP) of refrigeration compressor simultaneously.Hence one can see that, and air suction silencer is the requisite of at present reciprocal enclosed refrigeration compressor and is one of accessory of outbalance.

just because of air suction silencer, there is aforesaid good effect, therefore receive all the time the concern of industry, and the technical information of utilizing various technological means to use the anti-acoustic capability that improves air suction silencer is no lack of and is seen in the literature, to this, can confirm by being not limited to the following open source literature exemplifying: Chinese patent notice of authorization CN2663663Y recommends there be " muffler shell " for refrigeration compressor, this patent scheme has solved the sealing problem between upper and lower casing, for improving aforesaid COP value, has achievement and can noise reduction; " baffler " that CN2705629Y provides improves the sealing problem of the baffler in prior art equally, has with aforesaid CN2663663Y the effect playing the same tune on different musical instruments; Hook-type connecting vessels is set and by longitudinal baffle Jiang Xia anechoic chamber two the not isometric cavity volumes that are separated into 1: 3 in the feature Shi Xia anechoic chamber of " hermetically sealed compressor air suction silencer " that CN2733037Y introduces, this patent is helpful for reducing air suction and noise band frequency, but whole noise reduction is still not enough to reach the degree of people's expectation; The structure of " New Energy-saving Deadender Of Closed Refrigerant Motor-compressor " that CN2833127Y discloses is due to similar to aforementioned CN2733037Y, so technique effect is also similar; " Semi-direct suction muffler for refrigeration compressor " that CN2886124Y discloses for help is conveniently installed, and can in the transportation process with chiller plant, reduce probability of failure; " air suction sound eliminator for refrigeration compressor " that CN201165957Y recommends solved and prevented that foreign matter from entering the problem of compresser cylinder.

again, the cap of invention patent mandate notification number CN101487461B(air suction silencer of refrigeration compressor and the cooperating structure of housing), the air suction silencer of CN101545472B(refrigeration compressor) and the air suction silencer of CN101545473B(refrigeration compressor) these three patents propose by the applicant's front title, wherein CN101487461B has solved the problems such as uneven and burr between the cap of air suction silencer and housing, makes both combinations reach ultimate attainment degree; CN101545472B has solved the problem of protecting of covering to filter screen dexterously, the objective technique effect that embodies the capable record of Instructions Page 3 15-18; CN101545473B by setting up isolation lid between housing and cap; and cover and be designed with cofferdam in isolation; filter screen is fixed on cofferdam in tiling mode; thereby objective embodied by Instructions Page 3 10-14 capable concluded such as avoiding foreign material to undermine compressor through filter screen, technique effect such as protection compresser cylinder etc.

in the technology contents of the air suction silencer of refrigeration compressor exemplifying on be not limited to, every technological scheme that is intended to reduce noise that relates to roughly can be summarized as the following aspects: the one, increase the quantity of anechoic chamber; The 2nd, the length of lengthening suction line; The 3rd, reduce the effective cross section of suction line; The 4th, the suction line as disclosed in the Chinese invention patent application publication number CN101171424A of international publication number W02006/116830 " for the air suction silencer of refrigeration compressor " of employing complicated shape; The 5th, by increase anechoic chamber with lengthen that suction line is double to be held and get (double hold and use).But these technological means, when strengthening baffler anti-acoustic capability, have also increased the inhalation resistance of baffler, thereby have reduced the ride quality of compressor complete machine.

again, the technical problem that undermines compresser cylinder that the air suction silencer ubiquity that is not limited to exemplify is above caused by liquid hammer, because unavoidably mix and have liquid as the situation of the refrigeration agent of lubricant oil and on-gaseous in the refrigerant gas sucking at air suction silencer, in the institute of air suction silencer has living space, these liquids all can because of suck cylinder to cylinder produce do not wish to occur but the liquid hammer that objectively very easily occurs.

according to common practise, gas is compressible, and liquid is incompressible, so when refrigeration system has liquid refrigerant to enter compressor cylinder Shock Compression machine valve block, cause the damage of the parts such as compressor valve plate, when serious, cause compressor compresses part permanent damage.

owing to causing the reason of liquid hammer can be summarized as the following aspects: refrigeration agent or lubricant oil are too much; Liquid feeding is too fast; The degree of regulation of expansion valve (also can claim modulating valve) is that open degree is excessive; Vaporizer heat load is unstable; Aspirating valves is opened too fast (unloading capacity is too fast); System is lost rationally etc., therefore, industry custom is investigated disposal in the mode of " pin for the treatment of the head when the head aches is cured pin bitterly ", thereby ignored the Rational structure of even at all not expecting by means of air suction silencer and prevented the mentality of designing that liquid hammer occurs, more particularly, industry it has been generally acknowledged that between liquid hit phenomenon and the self structure of air suction silencer and does not have causality.

in view of above-mentioned prior art, be necessary to be further improved, for this reason, the applicant has done long-term and useful design, and taking strict secrecy provision Xia the applicant plant area to do experiment, result proving effect is distinguished, and technological scheme described below produces under this background.

Summary of the invention

task of the present invention is to provide a kind of and contributes to significantly to reduce noise, is conducive to avoid increasing the inhalation resistance of suction line and uses and ensure the efficient operational effect of compressor and be of value to that the on-gaseous material such as lubricant oil and liquid refrigerant that prevents from mixing in the refrigerant gas sucking in self-priming tracheae produces liquid hammer to the cylinder of compressor and the air suction silencer of using the refrigeration compressor of avoiding undermining cylinder.

task of the present invention completes like this, a kind of air suction silencer of refrigeration compressor, comprise a main casing and a cap matching with main casing, main casing has main casing air aspiration cavity, main casing suction port, main casing anechoic chamber, be used for the filter screen of giving vent to anger interface and filtering for the refrigerant gas that main casing suction port is introduced with the suction valve main casing matched and that there is main casing air outlet of refrigeration compressor, cap has cap air aspiration cavity and cap anechoic chamber, wherein: described main casing air aspiration cavity is positioned at one end of main casing, described main casing suction port is between described main casing air aspiration cavity and main casing anechoic chamber, and communicate with main casing anechoic chamber with main casing air aspiration cavity simultaneously, the described main casing interface of giving vent to anger extends on the outer wall of a side of the length direction be formed in main casing, described main casing air outlet communicates with main casing anechoic chamber, filter screen is arranged on the passage between described main casing suction port and main casing air outlet, described cap air aspiration cavity is corresponding with described main casing air aspiration cavity and match, described cap anechoic chamber is corresponding with described main casing anechoic chamber and match, be characterised in that: in described main casing anechoic chamber and from one end of the length direction of main casing anechoic chamber, to the other end, form and have a pair of parallel clamping plate, this is to forming and have a plugboard trough between clamping plate, by a pair of clamping plate, described main casing anechoic chamber is divided into anechoic chamber under the main casing of anechoic chamber and bottom on the main casing on top, on described main casing, in anechoic chamber and in the position of the interface of giving vent to anger corresponding to described main casing, form have one with the main casing transition breathing pipe that interface is connected of giving vent to anger, the transition ventilation tube chamber of this transition breathing pipe communicates with described main casing air outlet, and on main casing in anechoic chamber along the length direction of anechoic chamber on main casing form have one communicate with described main casing suction port for the refrigerant gas of being introduced by main casing suction port being introduced to the air entraining pipe in anechoic chamber on described main casing, and form in anechoic chamber and in the position of the transition breathing pipe corresponding to described, there is a main casing breathing pipe being connected with transition breathing pipe under described main casing, the main casing ventilation tube chamber of this main casing breathing pipe communicates with described transition ventilation tube chamber, and communicate with anechoic chamber under main casing, described filter screen is arranged on the position of the main casing breathing pipe suction port of main casing breathing pipe, in described cap anechoic chamber and in the position of the plugboard trough corresponding to described, form the plate that has the length of a length and plugboard trough to adapt, this plate inserts in described plugboard trough, and by this plate, described cap anechoic chamber is divided into anechoic chamber under the cap of anechoic chamber and bottom on the cap on top, on cap, anechoic chamber matches with anechoic chamber on described main casing, and under cap, anechoic chamber matches with anechoic chamber under described main casing, wherein: on described cap in anechoic chamber and be positioned at plate above form and to have a cap suction tude, the cap air inlet tube chamber of this cap suction tude communicates with anechoic chamber on described cap, under described cap in anechoic chamber and be positioned at plate below in the position of the cap suction tude corresponding to described, form and have a cap steam outlet pipe, the cap of this cap steam outlet pipe tube chamber of giving vent to anger communicates with described cap air inlet tube chamber, and communicate with anechoic chamber under cap, wherein: in the bottom of described main casing air aspiration cavity, on the tube wall of described cap suction tude and be positioned at the bottom of this tube wall and/or offer leakage opening on the wall body of anechoic chamber under described cap.

in a specific embodiment of the present invention, the described main casing interface of giving vent to anger is positioned at the middle position of outer wall of a side of the length direction of described main casing, and is respectively extended with one for the positioning boss with refrigeration compressor assembling in the give vent to anger corresponding both sides of outer wall of interface of this main casing.

in another specific embodiment of the present invention, the shape of cross section of described transition breathing pipe and described main casing breathing pipe is all rectangular or circular.

in another specific embodiment of the present invention, the width of described plugboard trough is suitable with the thickness of described plate, on plate and at the position that borders on corresponding to described transition breathing pipe and main casing breathing pipe, forms the chamber of stepping down.

in another specific embodiment of the present invention, on described cap and in the position of the main casing suction port corresponding to described, form and have one for avoiding, main casing suction port to be produced to the cavity of stepping down of interfering.

of the present invention, also have in a specific embodiment, at described main casing, towards the position, edge of a side of described cap, form the main casing sealed convex edge that has a perforation, and form towards the position, edge of a side of main casing at cap, have a sealed convex edge caulking groove, described main casing sealed convex edge is placed in sealed convex edge caulking groove.

technological scheme provided by the invention is with respect to one of technique effect of prior art institute tool, in the upper anechoic chamber that after the autonomous shell air inlet of refrigerant gas enters, on anechoic chamber and cap, anechoic chamber forms jointly on air entraining pipe enters by main casing, in the lower anechoic chamber that under anechoic chamber and cap, anechoic chamber forms jointly under cap suction tude and cap steam outlet pipe enter by main casing successively again, and then through main casing breathing pipe and transition breathing pipe, by the give vent to anger main casing air outlet of interface of main casing, introduce compressor successively after net filtration after filtration, therefore on, the mentality of designing that the space of lower anechoic chamber and employing in prior art increase pipeline is compared and is enlarged markedly, and the path length of whole suction line, thereby can significantly reduce the inhalation resistance of suction line, be conducive to the efficient operation of refrigeration compressor, two, the on-gaseous material that the setting of leakage opening can be avoided lubricant oil and/or refrigerant liquid and so on produces liquid hammer to the cylinder of compressor, thereby can play the effect of protection cylinder.

Accompanying drawing explanation

fig. 1 is embodiments of the invention structural drawing.

Embodiment

for the auditor that the makes Patent Office especially public can be expressly understood technical spirit of the present invention and beneficial effect more, claimant elaborates the mode with embodiment below, but to embodiment's description, be not all the restriction to the present invention program, any according to the present invention design, done only for pro forma but not substantial equivalent transformation all should be considered as technological scheme category of the present invention.

refer to Fig. 1, preferred use plastics have been provided and by the molded and shaped main casing 1 of mould and a cap 2 matching with main casing 1, claimant it should be noted that: the geometrical shape of main casing 1 is not subject to the restriction of shape shown, it can have other corresponding variation or claim to change, but the geometrical shape of cap 2 should keep the relation of following in sb's footsteps with the shape of main casing 1, to guarantee the reasonable coordination effect of cap 2 and main casing 1.

one end at main casing 1 has main casing air aspiration cavity 11 in the right-hand member formation of current icon location status, in the bottom of this main casing air aspiration cavity 11, offer a leakage opening 3, the location optimization of this leakage opening 3 is positioned on the diapire 111 of main casing air aspiration cavity 11, more preferred position is leakage opening 3 to be positioned to the intersection of the longitudinal wall 112 of diapire 111 and main casing air aspiration cavity 11, the present embodiment is selected the latter, but does not repel the former.At main casing 1, towards one end of aforesaid main casing air aspiration cavity 11, also on aforesaid longitudinal wall 112, offer a main casing suction port 12, this main casing suction port 12 communicates with main casing air aspiration cavity 11.

in a side of the length direction of main casing 1, be on the outer wall of middle position of upside of shown position state, to be extended with the main casing interface 14 of giving vent to anger, this main casing main casing air outlet 141 of interface 14 of giving vent to anger communicates with the main casing anechoic chamber 13 that is about to below describe.Under use state, this main casing air outlet 141 is matched with the suction valve of refrigeration compressor.Preferably, each extends to form on main casing is given vent to anger the outer wall of interface 14 and in the position of corresponding both sides a positioning boss 142, so that assemble with refrigeration compressor.

at the nearly middle part of the short transverse of the aforementioned main casing anechoic chamber 13 of main casing 1 and from one end of the length direction of main casing anechoic chamber 13, to the other end, form and have a pair of parallel clamping plate 16, the space between these a pair of clamping plate 16 is configured to plugboard trough 161.From diagram, by a pair of clamping plate 16, aforesaid main casing anechoic chamber 13 is separated into anechoic chamber 132 under the main casing of 131He bottom, anechoic chamber on the main casing on top, on main casing, in anechoic chamber 131 and along the length direction of anechoic chamber 131 on main casing, form and have an air entraining pipe 1312, the bleed tube chamber 13121 of this air entraining pipe 1312 communicates with aforesaid main casing suction port 12, the right-hand member that is to say air entraining pipe 1312 (be take current icon location status as example, below all left sides that relates to, right, on, lower and so on directionality concept is with example) dock with main casing suction port 12, and the air entraining pipe air outlet 13122 of air entraining pipe 1312 communicates with anechoic chamber 131 on aforesaid main casing.Hence one can see that, and the refrigerant gas that autonomous shell air inlet 12 sucks 13122 is introduced on main casings in anechoic chamber 131 from air entraining pipe air outlet after the bleed tube chamber 13121 of air entraining pipe 1312.

again, on aforesaid main casing, in anechoic chamber 131 and in the position of the base portion of the interface 14 of giving vent to anger corresponding to aforesaid main casing, form and have a transition adapting pipe 1311, the transition of this transition adapting pipe 131 connects tube chamber 13111 and communicates with aforesaid main casing air outlet 141, communicates with the give vent to anger cavity 143 of interface 14 of main casing.

and, under aforesaid main casing, in the anechoic chamber 132 and position that is lower end at the base portion corresponding to aforesaid transition adapting pipe 1311 forms a main casing breathing pipe 1321, the main casing ventilation tube chamber 13211 of this main casing breathing pipe 1321 communicates with bleed tube chamber 13121, and the main casing breathing pipe suction port 13212 of this main casing breathing pipe 1321 communicates with anechoic chamber under main casing 132.

in the present embodiment, for the shape of cross section of transition breathing pipe 1311 and main casing breathing pipe 1321, be preferably rectangle, if but changing circle or other similar shape into, should be considered as so and technological scheme disclosed by the invention equivalence.That is to say, can not limit the scope of the invention because of the change in shape of transition breathing pipe 1311 and main casing breathing pipe 1321.

the filter screen 15 providing in figure comprises a filter screen body 151 and a screen frame 152, owing in the present embodiment the shape of cross section of main casing breathing pipe 1321 being chosen as to rectangle, therefore the screen frame that screen frame 152 is rectangle, and fix with the position of aforesaid main casing breathing pipe suction port 13212.Owing to forming on the outer wall corresponding to main casing breathing pipe suction port 13212, there is a surperficial step 13213 that protrudes from the tube wall of main casing breathing pipe 1321, therefore screen frame 152 is fixing with this step 13213, it is fixed that means of fixation both can have been inserted build-in, step 13213 is inserted and screen frame 152, also can adopt thermofussion welding to fix, when adopting thermofussion welding fixedly, the material of screen frame 152 is plastics, certainly can also adopt other similar mode to fix.The upper end of filter screen body 15 and screen frame 152 are fixing, and lower end formation has the pocket structure with four net walls 1511.So the effective filtration area of the filter screen 15 of structure is considerably beyond the sectional area of main casing breathing pipe 1321, can avoid the foreign material that filter out to be stacked in a short time very soon filter screen body 151 simultaneously, so air suction silencer of refrigeration compressor is unlikely to cause inhalation resistance to increase because filter screen 15 stops up after long-term work.Because just in case the bottom of filter screen body 151 suffers that foreign material adhere to obstruction, the surrounding net wall of filter screen body 151 still can be given full play to desirable ventilatory effect so.

please continue to refer to Fig. 1, in the cap anechoic chamber 22 of the cap 2 of having mentioned in the above and from one end of the length direction of cap anechoic chamber 22, to the other end, form and have a plate 221, this plate 221 is positioned at the middle part of the short transverse of cap anechoic chamber 22 substantially, more precisely the position of corresponding aforesaid plugboard trough 161, and when cap 2 covers mutually with main casing 1, plate 221 is inserted in plugboard trough 161.As preferred scheme, the width of plugboard trough 161 should adapt with the thickness of plate 22, to embody both Tenon effects, so-called tenon is plate 221, and the so-called fourth of the twelve Earthly Branches is plugboard trough 161.

shown in figure, on plate 22, form the chamber 2211 of stepping down, this object of stepping down chamber 2211 is for avoiding the pipeline section of the connected portion of aforesaid transition breathing pipe 1311 and main casing breathing pipe 1321.And then as shown in Figure 1, by plate 22Er Jiang cap anechoic chamber 22, be separated into anechoic chamber 223 under the cap of 222He bottom, anechoic chamber on the cap on top, on cap, anechoic chamber 222 coordinates with anechoic chamber on main casing 131 and is configured to whole Yi Geshang anechoic chamber, with example, under cap, anechoic chamber 223 matches with anechoic chamber under main casing 132 and is configured to whole Yi Gexia anechoic chamber.

on cap, the interior formation in anechoic chamber 222 has a cap suction tude 2221, the cap air inlet tube chamber 22211 of this cap suction tude 2221 communicates with anechoic chamber on cap 22, so the refrigerant gas of being drawn by the air entraining pipe air outlet 13122 of aforesaid air entraining pipe 1312 only just can enter under cap in anechoic chamber 223 by way of cap air inlet tube chamber 22211 is rear.Under cap, in anechoic chamber 223 and in the position corresponding to aforesaid cap suction tude 2221, form and have a cap steam outlet pipe 2231 being connected with cap suction tude 2221, the cap of this cap steam outlet pipe 2231 tube chamber 22311 of giving vent to anger communicates with aforesaid cap air inlet tube chamber 22211, and communicates with anechoic chamber under cap 232.Therefore enter on cap the refrigerant gas in anechoic chamber 222 and give vent to anger that tube chamber 22311 is rear just enters anechoic chamber 223 under cap entering cap by way of cap air inlet tube chamber 22211.

please still see Fig. 1, on cap 2 and in position corresponding to aforesaid main casing suction port 12, form and have or claim to be processed with the cavity 23 of stepping down, by this, step down cavity 23 and play elimination and avoid the effect to main casing suction port 12 generation air inlet obstacles.After cap 2 coordinates with main casing 1, be formed in cap air aspiration cavity on cap 2 21 and aforesaid main casing air aspiration cavity 11 and be jointly configured to a complete air aspiration cavity.

as one of technological points of technological scheme provided by the invention, on the wall body of aforesaid cap suction tude 2221 and be positioned at bottom and also offer a leakage opening 3; And on the diapire of anechoic chamber 223 or sidewall, offer again a leakage opening 3 under cap, in the present embodiment, the leakage opening of offering again 3 is opened on the diapire of anechoic chamber 223 under cap.

claimant it should be noted that: the aforesaid leakage opening 3 that is opened in the bottom of main casing air aspiration cavity 11, be opened on the wall body of cap suction tude 2221 and be positioned at the leakage opening 3 of bottom and be opened in the diapire of anechoic chamber 223 under cap or the leakage opening 3 at 3 these three places of the leakage opening on sidewall all to possess be optimal selection of the present invention; if yet select one of them or two, should not be considered as having dissociated so protection scope of the present invention.The positive effect of these leakage openings 3 is to avoid the refrigerant liquid of lubricant oil and/or non-gasification to cause the liquid hammer to the cylinder of refrigeration compressor, uses protection cylinder.Particularly, these leakage openings 3 guaranteed that air suction silencer mixes in sucking gas such as lubricant oil and liquid refrigerant etc. time, these liquids can be back in compressor body by leakage opening 3, can not be inhaled into cylinder and cause cylinder to occur that liquid hammer damages.

still refer to Fig. 1, at main casing 1, towards the position, edge of a side of cap 2, form and have the main casing sealed convex edge 17 that a ring is logical, and form to have towards the position, edge of a side of main casing 1 at cap 2, encircle logical sealed convex edge caulking groove 24, by main casing sealed convex edge 17, insert sealed convex edge caulking groove 24 and cap 2 is coordinated with main casing 1, aforesaid plate 221 is inserted in plugboard trough 161 simultaneously.Certainly, cap 2 is not limited to aforementioned manner with the mode of being sealed and matched of main casing 1, such as adopting these three Qian Cheng Tianyin Electromechanical Co., Ltd., Changshu by the applicant of invention patent mandate notification number CN101487461B, CN101545472B and CN101545473B(to propose) etc. in the sealing assembling mode of instruction.

during refrigeration compressor work, refrigerant gas is entered the bleed tube chamber 13121 of air entraining pipe 1312 by main casing suction port 12, on the air entraining pipe air outlet 13122 of air entraining pipe 1312 enters by cap, anechoic chamber 222 coordinates in the upper anechoic chamber forming jointly with anechoic chamber on main casing 131, from the cap air inlet tube chamber 22211 of cap suction tude 2221, enter cap steam outlet pipe 2231 again, by the cap of cap steam outlet pipe 2231 tube chamber 22311 of giving vent to anger, entered in the lower anechoic chamber jointly being formed by anechoic chamber 132 under anechoic chamber under cap 223 and main casing, after filtering, filter screen 15 through the main casing ventilation tube chamber 13211 of main casing breathing pipe 1321, enters again the transition ventilation tube chamber 13111 of transition breathing pipe 1311, and then after giving vent to anger the cavity 143 of interface 14, introduced main casing the suction valve of refrigeration compressors by main casing air outlet 141.

in sum, technological scheme provided by the invention has overcome the shortcoming in prior art all sidedly, completed invention task, embodied objectively the technique effect described in the technique effect hurdle that claimant mentions in the above, thereby to can yet be regarded as be a ultimate attainment technological scheme.

Claims (6)

1. a kind of air suction silencer of refrigeration compressor, comprise a main casing (1) and a cap (2) matching with main casing (1), main casing (1) has main casing air aspiration cavity (11), main casing suction port (12), main casing anechoic chamber (13), be used for the filter screen (15) of giving vent to anger interface (14) and filtering for the refrigerant gas that main casing suction port (12) is introduced with the suction valve main casing matched and that there is main casing air outlet (141) of refrigeration compressor, cap (2) has cap air aspiration cavity (21) and cap anechoic chamber (22), wherein: described main casing air aspiration cavity (11) is positioned at one end of main casing (1), described main casing suction port (12) is positioned between described main casing air aspiration cavity (11) and main casing anechoic chamber (13), and communicate with main casing air aspiration cavity (11) and main casing anechoic chamber (13) simultaneously, the described main casing interface (14) of giving vent to anger extends on the outer wall of a side of the length direction be formed in main casing (1), described main casing air outlet (141) communicates with main casing anechoic chamber (13), filter screen (15) is arranged on the passage between described main casing suction port (12) and main casing air outlet (141), described cap air aspiration cavity (21) is corresponding with described main casing air aspiration cavity (11) and match, described cap anechoic chamber (22) is corresponding with described main casing anechoic chamber (13) and match, it is characterized in that: in described main casing anechoic chamber (13) and from one end of the length direction of main casing anechoic chamber (13), to the other end, form and have a pair of parallel clamping plate (16), this is to forming and have a plugboard trough (161) between clamping plate (16), by a pair of clamping plate (16), described main casing anechoic chamber (13) is divided into anechoic chamber (132) under the main casing of anechoic chamber (131) and bottom on the main casing on top, in anechoic chamber on described main casing (131) and in the position of the interface (14) of giving vent to anger corresponding to described main casing, form have one with the main casing transition breathing pipe (1311) that interface (14) is connected of giving vent to anger, the transition ventilation tube chamber (13111) of this transition breathing pipe (1311) communicates with described main casing air outlet (141), and in anechoic chamber on main casing (131) along the length direction of anechoic chamber on main casing (131) form have one communicate with described main casing suction port (12) for introducing the air entraining pipe (1312) in anechoic chamber on described main casing (131) by the refrigerant gas of main casing suction port (12) introducing, and form in anechoic chamber (132) and in the position of the transition breathing pipe (1311) corresponding to described, there is a main casing breathing pipe (1321) being connected with transition breathing pipe (1311) under described main casing, the main casing ventilation tube chamber (13211) of this main casing breathing pipe (1321) communicates with described transition ventilation tube chamber (13111), and communicate with anechoic chamber under main casing (132), described filter screen (15) is arranged on the position of the main casing breathing pipe suction port (13212) of main casing breathing pipe (1321), in described cap anechoic chamber (22) and in the position of the plugboard trough corresponding to described (161), form the plate (221) that has the length of a length and plugboard trough (161) to adapt, this plate (221) inserts in described plugboard trough (161), and by this plate (221), described cap anechoic chamber (22) is divided into anechoic chamber (223) under the cap of anechoic chamber (222) and bottom on the cap on top, anechoic chamber on cap (222) matches with anechoic chamber (131) on described main casing, and under cap, match with anechoic chamber (132) under described main casing anechoic chamber (223), wherein: in anechoic chamber on described cap (222) and the top that is positioned at plate (221) forms a cap suction tude (2221), the cap air inlet tube chamber (22211) of this cap suction tude (2221) communicates with anechoic chamber (222) on described cap, in anechoic chamber under described cap (223) and the below that is positioned at plate (221) forms and has a cap steam outlet pipe (2231) in the position of the cap suction tude (2221) corresponding to described, the cap of this cap steam outlet pipe (2231) tube chamber (22311) of giving vent to anger communicates with described cap air inlet tube chamber (22211), and communicate with anechoic chamber under cap (223), wherein: in the bottom of described main casing air aspiration cavity (11), on the tube wall of described cap suction tude (2221) and be positioned at the bottom of this tube wall and/or offer leakage opening (3) on the wall body of anechoic chamber (223) under described cap.

2. the air suction silencer of refrigeration compressor according to claim 1, it is characterized in that the described main casing interface (14) of giving vent to anger is positioned at the middle position of outer wall of a side of the length direction of described main casing (1), and be respectively extended with one for the positioning boss (142) with refrigeration compressor assembling in the give vent to anger corresponding both sides of outer wall of interface (14) of this main casing.

3. the air suction silencer of refrigeration compressor according to claim 1, the shape of cross section of the transition breathing pipe (1311) described in it is characterized in that and described main casing breathing pipe (1321) is all rectangular or circular.

4. the air suction silencer of refrigeration compressor according to claim 1, the width that it is characterized in that described plugboard trough (161) is suitable with the thickness of described plate (221), at plate (221), above and at the position that borders on corresponding to described transition breathing pipe (1311) and main casing breathing pipe (1321) forms the chamber (2211) of stepping down.

5. the air suction silencer of refrigeration compressor according to claim 1, is characterized in that upper at described cap (2) and in the position of the main casing suction port (12) corresponding to described, forms to have and avoid main casing suction port (12) to produce the cavity (23) of stepping down of interfering.

6. the air suction silencer of refrigeration compressor according to claim 1, it is characterized in that forming and having the main casing sealed convex edge (17) that a ring is logical towards the position, edge of a side of described cap (2) at described main casing (1), and form towards the position, edge of a side of main casing (1) at cap (2), have a sealed convex edge caulking groove (24), described main casing sealed convex edge (17) is placed in sealed convex edge caulking groove (24).