CN217999827U - Suction silencer of small refrigeration compressor - Google Patents

Abstract

A suction muffler for a small refrigeration compressor comprises a housing having a muffler chamber; the shell cover is matched with the upper cover of the shell and seals the upper cavity opening part of the sound-deadening cavity; the air inlet pipe and the air outlet pipe are formed on the shell cover, the air outlet of the air inlet pipe at the lower end of the air inlet pipe is communicated with the silencing cavity, the air inlet of the air inlet pipe at the upper end is matched and connected with the air outlet of the compressor cylinder, the air inlet of the air outlet pipe at the lower end of the air outlet pipe is communicated with the silencing cavity, and the air outlet of the air outlet pipe at the upper end is matched and connected with the air inlet of the compressor cylinder, and the air-conditioning device is characterized in that: the silencer also comprises a silencing and efficiency increasing mechanism which is inserted in the silencing cavity and divides the silencing cavity into a first silencing chamber and a second silencing chamber which are communicated with each other by the silencing and efficiency increasing mechanism, the air outlet of the air inlet pipe is communicated with the second silencing chamber, and the air inlet of the air outlet pipe is communicated with the first silencing chamber. The advantages are that: the installation requirement in the limited space of the steel shell of the small-sized refrigeration compressor is met; the noise reduction effect is improved; the whole structure is simple, the manufacture and the assembly are convenient, and the economy and the low price are reflected.

Description

Suction silencer of small refrigeration compressor

Technical Field

The utility model belongs to the technical field of the compressor accessory, concretely relates to small-size compressor's muffler of breathing in.

Background

The small-sized refrigeration compressor is a compressor used in a refrigeration apparatus having a relatively small cooling capacity, for example, a refrigerator, an ice chest, a supermarket showcase, a vending machine, or the like having a cooling capacity of about 1.5 hp. In order to meet the application requirements of different occasions, the working volume range of different types of refrigeration compressors, such as pistons, is approximately 2-38cm ³ The working volume range of the flowing piston compressor is 3.1-96 cm ³ The working volume range of the scroll compressor is 15.1-243.1 cm ³ However, only models near the lower working volume limit belong to small refrigeration compressors. The refrigerant for the small-sized refrigeration compressor includes R22, R410A, R600A, R134A, R404A, R209, and R744. In addition, the steel shell space of the small-sized refrigeration compressor is relatively narrow. As known in the art, a fully-enclosed refrigeration compressor usually has a suction muffler installed therein, when the refrigeration compressor is in operation, a cylinder sucks refrigerant gas through the suction muffler, and the suction muffler not only reduces the heating effect of the refrigerant when the interior of the compressor generates heat, but also reduces noise and vibration caused by pressure pulsation in the flowing process of the refrigerant gas, thereby being beneficial to reducing noise in the operation process of the compressor, and simultaneously being capable of effectively improving the working efficiency of the compressor, i.e. improving the energy efficiency ratio (COP) of the compressor. It follows that the suction muffler is an indispensable and important accessory for the reciprocating hermetic refrigeration compressors at present.

Typical examples of the suction muffler of the aforementioned small-sized refrigeration compressor are "muffler" recommended in document a. Cn2705629y and "a suction muffler for mobile refrigeration compressor" provided in document b. Cn211448946u. In the above document a, a casing chamber of a muffler casing is divided into a suction chamber and a discharge chamber, and a suction pipe and a discharge pipe are integrally formed with a muffler cover and are each located on an upper surface of the muffler cover, wherein after the muffler cover is fitted to the muffler casing cover, the suction pipe communicates with the suction chamber, and the discharge pipe communicates with the discharge chamber. The working principle is as follows: refrigerant gas from the exhaust port of the cylinder of the refrigeration compressor is sucked into the suction chamber through the suction port of the suction pipe, the gas entering the suction chamber enters the exhaust chamber through the ventilation passage at the upper part of the partition plate between the suction chamber and the exhaust chamber, and the gas entering the exhaust chamber is exhausted through the exhaust pipe and is supplied to the intake port of the cylinder of the refrigeration compressor for suction, so that the purpose of noise reduction is achieved in the whole process (see the last paragraph of the description of the document a). The difference between the above-mentioned document b and document a is that the lower end of the suction pipe is passed through the suction chamber in the form of a flow guide pipe and extended to the discharge chamber as a sound deadening chamber after passing through a partition plate for partitioning the suction chamber and the discharge chamber, and then drawn out by a discharge pipe (referred to as "inlet pipe") and supplied to the cylinder inlet port of the refrigeration compressor for suction.

Although the above two patents have the advantages of good noise reduction effect described in the specification, the requirements for the structure design of the suction muffler are becoming more and more stringent with the increasing requirements for noise reduction of the refrigeration compressor. On the basis of this, there is still a large room for improvement in the silencing effect of the silencers disclosed in the above documents a and b, and the technical solutions described below are made in this context.

SUMMERY OF THE UTILITY MODEL

The task of the utility model is to provide a help satisfying the installation requirement in the finite space of small-size compressor's box hat and be favorable to showing to improve and fall the noise cancelling effect of making an uproar and be of value to the small-size compressor's of simplifying the structure muffler of breathing in.

The task of the utility model is accomplished in this way, a suction muffler of a small-sized refrigeration compressor comprises a shell, a suction muffler body and a suction muffler body, wherein the shell is provided with a silencing cavity; the shell cover is matched with the upper part of the shell in a covering manner and seals the upper cavity opening part of the silencing cavity; the air inlet pipe and the air outlet pipe are directly formed on the shell cover, an air inlet pipe air outlet at the lower end of the air inlet pipe is communicated with the silencing cavity, an air inlet pipe air inlet at the upper end of the air inlet pipe is matched and connected with an air outlet of a compressor cylinder, an air outlet pipe air inlet at the lower end of the air outlet pipe is communicated with the silencing cavity, an air outlet pipe air outlet at the upper end of the air outlet pipe is matched and connected with an air inlet of the compressor cylinder, the air-conditioning and noise-enhancing device is characterized by further comprising a noise-enhancing mechanism, the noise-enhancing mechanism is inserted and matched in the silencing cavity, the silencing cavity is divided into a first silencing chamber I and a second silencing chamber II which are communicated with each other by the noise-enhancing mechanism, the air outlet of the air inlet pipe is communicated with the second silencing chamber II, and the air inlet of the air outlet pipe is communicated with the first silencing chamber I.

In a specific embodiment of the present invention, a pair of parallel left baffle inserts of the muffling chamber are formed on the wall of the muffling chamber left wall of the muffling chamber and along the height direction of the wall of the muffling chamber left wall, and a pair of parallel right baffle inserts of the muffling chamber are formed on the wall of the muffling chamber right wall of the muffling chamber and along the height direction of the wall of the muffling chamber right wall, the positions of the right baffle inserts of the muffling chamber correspond to the positions of the left baffle inserts of the muffling chamber, and the bottom inserts of the muffling chamber formed on the bottom wall of the muffling chamber connect the left baffle inserts of the muffling chamber and the lower ends of the right baffle inserts of the muffling chamber, the space between the left baffle inserts of the muffling chamber is a left baffle slot of the muffling chamber, the space between the right baffle inserts of the muffling chamber is a right baffle of the muffling chamber, and the right baffle of the muffling chamber is connected to the left baffle slot of the muffling chamber, the bottom inserts of the muffling chamber are connected to the right baffle of the muffling chamber and the bottom inserts of the muffling chamber are connected to the right baffle; the silencing synergistic mechanism is simultaneously inserted and matched with the silencing chamber left partition plate slot, the silencing chamber right partition plate slot and the silencing chamber partition plate bottom slot.

In another specific embodiment of the present invention, the silencing synergistic mechanism comprises a silencing communicating vessel left pipe flap and a silencing communicating vessel right pipe flap, wherein a silencing chamber left partition is formed in the middle of the silencing communicating vessel left pipe flap in a longitudinal state, the left side edge portion of the height direction of the silencing chamber left partition is in inserting fit with the silencing chamber left partition slot, the edge portion of the lower end of the silencing chamber left partition is in inserting fit with the left end of the silencing chamber partition bottom slot, the rear end of the silencing communicating vessel left pipe flap is located in the first silencing chamber i, the front end of the silencing communicating vessel left pipe flap is located in the second silencing chamber ii, a silencing hole for communicating the silencing communicating vessel left pipe cavity of the silencing communicating vessel left pipe flap with the side portion of the first silencing chamber i of the silencing chamber of the housing is formed at the rear end of the silencing communicating vessel left pipe flap and at the rear side of the silencing chamber left partition, the air inlet of the left pipe valve of the silencing communicating device is positioned at the upper part of the front end of the left pipe valve of the silencing communicating device, the air outlet of the left pipe valve of the silencing communicating device is positioned at the upper part of the rear end of the left pipe valve of the silencing communicating device, the left side of the right pipe valve of the silencing communicating device is matched with the right side of the left pipe valve of the silencing communicating device, the middle part of the right pipe valve of the silencing communicating device and the position corresponding to the left baffle of the silencing chamber form a right baffle of the silencing chamber in a longitudinal state, the left side edge part of the right baffle of the silencing chamber in the height direction is inserted and matched with the right side of the left baffle of the silencing chamber, the edge part of the right side of the right baffle of the silencing chamber in the height direction is inserted and matched with the slot of the right baffle of the silencing chamber, the edge part of the lower end of the right baffle of the silencing chamber is inserted and matched with the right end of the slot at the bottom of the baffle of the silencing chamber, the rear end of the right pipe flap of the silencing communicating device is positioned in the first silencing chamber I, the front end of the right pipe flap of the silencing communicating device is positioned in the second silencing chamber II, a right pipe flap side air outlet silencing hole for communicating a right pipe flap cavity of the silencing communicating device with the first silencing chamber I of the silencing cavity is formed in the rear end of the right pipe flap of the silencing communicating device and in the rear side of a right partition plate of the silencing chamber, the right pipe flap side air outlet silencing hole corresponds to the left pipe flap side air outlet silencing hole, a right pipe flap air inlet of the silencing communicating device right pipe flap is positioned in the upper front end of the right pipe flap of the silencing communicating device and is matched with the left pipe flap air inlet of the silencing communicating device in a face-to-face manner, a right pipe flap air outlet of the silencing communicating device right pipe flap is positioned in the upper rear end of the right pipe flap of the silencing communicating device and is matched with the left pipe flap air outlet of the silencing communicating device in a face-to-face manner; the shell covers one downward side and is simultaneously matched with the left silencing chamber partition plate and the right silencing chamber partition plate in an embedded mode at the positions corresponding to the upper ends of the left silencing chamber partition plate and the right silencing chamber partition plate of the silencing chamber, the air outlet of the air inlet pipe is communicated with a communicator air inlet formed by matching the left pipe flap air inlet of the silencing communicator and the right pipe flap air inlet of the silencing communicator through the second silencing chamber II, and the air inlet of the air outlet pipe is matched with the left pipe flap air outlet of the silencing communicator and the right pipe flap air outlet of the silencing communicator to form a communicator air outlet matched together; a relief cavity is formed in front of and along the height of the right side wall of the housing.

In another specific embodiment of the present invention, a first silencing chamber oil drip hole i is disposed on the bottom wall of the first silencing chamber i, and a second silencing chamber oil drip hole ii is disposed on the bottom wall of the second silencing chamber ii, an oil leading port is disposed on the outer wall of the bottom of the housing and is extended from a position corresponding to the first silencing chamber oil drip hole i and the second silencing chamber oil drip hole ii, and the first silencing chamber oil drip hole i and the second silencing chamber oil drip hole ii are communicated with the oil leading port.

In another specific embodiment of the present invention, the right side of the height direction of the left baffle of the anechoic chamber is configured with a pair of right baffle left side edge insertion strips, the space between the pair of right baffle left side edge insertion strips is configured as a right baffle left side edge insertion slot, and the left side edge position of the height direction of the right baffle of the anechoic chamber is inserted and embedded with the right baffle left side edge insertion slot.

The utility model discloses a still have a specific embodiment casing lid one side down and corresponding to the position of the outlet duct air inlet of outlet duct extends has a lamella gas outlet to insert the pipe head, the lamella gas outlet that inserts lamella gas outlet insert the pipe head under the state of the face-to-face complex state each other of left lamella gas outlet of amortization linker and right lamella gas outlet of amortization linker inserts the pipe head intracavity.

In a more specific embodiment of the present invention, a filter net limiting step is formed on an inner wall of an air inlet of an outlet pipe of the outlet pipe and at a boundary portion of the pipe joint inserted with the pipe segment air outlet, and a top end surface of the silencing communicating vessel left pipe segment air outlet and the silencing communicating vessel right pipe segment air outlet after face-to-face matching with each other and the filter net limiting step are provided with a filter net therebetween.

In a further specific embodiment of the present invention, a silencing chamber partition caulking groove is formed on the downward side of the housing cover and at a position corresponding to the upper ends of the silencing chamber left and right partitions, respectively, and is fitted to the upper end edge portion of the silencing chamber left and right partitions.

In a still more specific embodiment of the present invention, a mounting seat positioning flange is formed on the outer wall of the lower end of the outlet duct at positions corresponding to each other in the front-rear direction.

In yet another specific embodiment of the present invention, a through-going casing upper end edge caulking groove is formed at a downward side of the casing cover and at a position corresponding to the upper end peripheral edge of the casing, and the casing upper end edge caulking groove is fitted with the casing upper end edge of the casing; the left side and the right side of the outer wall of the shell are respectively provided with a shell embedded foot, the left side and the right side of the shell cover are respectively provided with an embedded foot buckle at the position corresponding to the shell embedded foot, and the shell embedded foot is clamped with the embedded foot buckle.

The technical scheme provided by the utility model the technical effect lie in: because the volumes of the shell and the shell cover are relatively small, and the air inlet pipe and the air outlet pipe are directly formed on the shell cover, the installation requirement in the limited space of the steel shell of the small refrigeration compressor can be met; the silencing synergistic mechanism is arranged in the silencing cavity and divides the silencing cavity into a first silencing chamber I and a second silencing chamber II which are communicated with each other, so that the silencing synergistic mechanism is favorable for obviously improving the noise reduction effect; the whole structure is relatively simple, so that the device can be conveniently manufactured and assembled, and the economic and low-cost effects can be reflected.

Drawings

Fig. 1 is a structural diagram of the embodiment of the present invention.

Fig. 2 is a cross-sectional view of fig. 1.

Detailed Description

In order to make the technical essence and advantages of the present invention more clearly understandable, the applicant below describes in detail embodiments, but the description of the embodiments is not a limitation of the solution of the present invention, and any equivalent changes made according to the inventive concept, which are only formal and not substantial, should be considered as the technical scope of the present invention.

In the following description, all the concepts related to the directions or orientations of up, down, left, right, front and rear are exemplified according to the position state of fig. 1, and thus, it should not be understood as a particular limitation to the technical solution provided by the present invention.

Referring to fig. 1, there is shown a housing 1 molded from plastic, the housing 1 having a sound-deadening chamber 11; a housing cover 2 is shown, which is also molded from plastic, and which housing cover 2 is fitted over the upper part of the housing 1 and closes the upper mouth of the sound-damping chamber 11; an inlet pipe 3 and an outlet pipe 4 are shown, which are also moulded from plastic, the inlet pipe 3 and the outlet pipe 4 being formed directly on the housing cover 2, and an inlet pipe outlet 31 at the lower end of the inlet pipe 3 communicating with the sound-deadening chamber 11, an inlet pipe inlet 32 at the upper end of the inlet pipe 3 being in use coupled to the compressor cylinder outlet, an outlet pipe inlet 41 at the lower end of the outlet pipe 4 communicating with the sound-deadening chamber 11, and an outlet pipe outlet 42 at the upper end of the outlet pipe 4 being in use coupled to the compressor cylinder inlet.

As the utility model provides a technical scheme's technical essential: the structure system of the suction muffler of the small-sized refrigeration compressor also comprises a silencing and efficiency increasing mechanism 5, the silencing and efficiency increasing mechanism 5 is inserted and matched in the silencing cavity 11, the silencing cavity 11 is divided into a first silencing chamber I111 and a second silencing chamber II 112 which are communicated with each other by the silencing and efficiency increasing mechanism 5, the air outlet 31 of the air inlet pipe is communicated with the second silencing chamber II 112, and the air inlet 41 of the air outlet pipe is communicated with the first silencing chamber I111.

A pair of left muffler chamber partition insert pieces 12 parallel to each other are formed on the wall of the left muffler chamber of the aforementioned muffler chamber 11 and along the height direction of the wall of the left muffler chamber, and a pair of right muffler chamber partition insert pieces 13 parallel to each other are formed on the wall of the right muffler chamber of the muffler chamber 11 and along the height direction of the wall of the right muffler chamber, the positions of the right muffler chamber partition insert pieces 13 corresponding to the positions of the pair of left muffler chamber partition insert pieces 12, and the lower ends of the pair of left muffler chamber partition insert pieces 12 and the pair of right muffler chamber partition insert pieces 13 are connected by a pair of bottom muffler chamber partition insert pieces 14 formed on the bottom wall of the muffler chamber 11, the space between the pair of left muffler chamber partition insert pieces 12 is formed as a left muffler chamber partition insert slot 121, the space between the pair of left muffler chamber partition insert pieces 13 is formed as a right muffler chamber partition insert slot 131, and the right muffler chamber insert slot 131 is formed in correspondence with the left muffler chamber insert slot 121, the space between the pair of bottom muffler chamber insert pieces 14 is formed in correspondence with the right muffler chamber insert slot 141, and the right muffler chamber insert slot 141 is formed in communication with the bottom of the muffler chamber insert slot 141, and the right muffler chamber insert slot 141 is formed in communication with the muffler chamber insert piece 141, and the right muffler chamber insert slot 141, and the muffler chamber insert piece 141, and the right end of the muffler chamber insert piece is formed in communication with the muffler chamber insert slot 141; the silencing effect increasing mechanism 5 is inserted into the silencing chamber left partition slot 121, the silencing chamber right partition slot 131 and the silencing chamber partition bottom slot 141 at the same time.

Referring to fig. 2 in combination with fig. 1, the silencing and efficiency increasing mechanism 5 includes a silencing and communicating vessel left pipe 51 and a silencing and communicating vessel right pipe 52, a silencing chamber left partition 511 is formed in the middle of the silencing and communicating vessel left pipe 51 in a longitudinal state, the left side edge of the height direction of the silencing chamber left partition 511 is fitted into the silencing chamber left partition slot 121 in an inserting manner, the edge of the lower end of the silencing chamber left partition 511 is fitted into the left end of the silencing chamber partition bottom slot 141 in an inserting manner, the rear end of the silencing and communicating vessel left pipe 51 is located in the first silencing chamber i 111, the front end of the silencing and communicating vessel left pipe 51 is located in the second silencing chamber ii 112, a silencing and communicating vessel left pipe cavity 512 of the silencing and the left side part 513 of the silencing and communicating vessel partition 511 is provided at the rear end of the silencing and communicating vessel left pipe 51 and the left side part of the silencing and communicating vessel left pipe 111 of the silencing and communicating vessel 11 of the housing 1, a silencing communicating vessel left-hand valve air inlet 514 of the silencing communicating vessel left-hand valve 51 is positioned at the upper front end of the silencing communicating vessel left-hand valve 51, a silencing communicating vessel left-hand valve air outlet 515 of the silencing communicating vessel left-hand valve 51 is positioned at the upper rear end of the silencing communicating vessel left-hand valve 51, the left side of the silencing communicating vessel right-hand valve 52 is fitted to the right side of the silencing communicating vessel left-hand valve 51, a silencing chamber right-hand partition 521 is formed in the middle of the silencing communicating vessel right-hand valve 52 and in the longitudinal direction at a position corresponding to the silencing chamber left-hand partition 511, the left side edge portion in the height direction of the silencing chamber right-hand partition 521 is fitted to the right side of the silencing chamber left-hand partition 511 by insertion, and the edge portion in the right side in the height direction of the silencing chamber right-hand partition 521 is fitted to the silencing chamber right-hand partition slot 131 by insertion, the edge part of the lower end of the silencing chamber right partition plate 521 is inserted and matched with the right end of the silencing chamber partition plate bottom slot 141, the rear end of the silencing communicating device right tube flap 52 is positioned in the first silencing chamber I111, the front end of the silencing communicating device right tube flap 52 is positioned in the second silencing chamber II 112, a right tube flap side air outlet silencing hole 523 for communicating the silencing communicating device right tube flap cavity 522 of the silencing communicating device right tube flap 52 with the first silencing chamber I111 of the silencing chamber 11 is arranged at the rear end of the silencing communicating device right tube flap 52 and at the rear side of the silencing chamber right partition plate 521, the right tube flap side air outlet silencing hole 523 corresponds to the left tube flap side air outlet silencing hole 513, the silencing communicating device right tube flap air inlet 524 of the silencing communicating device right tube flap 52 is positioned at the upper part of the front end of the silencing communicating device right tube flap 52 and is matched with the communicating device left tube flap air inlet face to face, the communicating device right tube flap air outlet hole 514 of the communicating device right tube flap 52 is positioned at the upper part of the silencing communicating device right tube flap 52 and is matched with the left air outlet hole 525 and the left tube flap air outlet hole 515; the downward side of the housing cover 2 is matched with the left baffle 511 and the right baffle 521 of the anechoic chamber at the same time at the positions corresponding to the upper ends of the left baffle 511 and the right baffle 521 of the anechoic chamber, the air inlet pipe air outlet 31 of the air inlet pipe 3 is communicated with a connector air inlet formed by matching the left pipe flap air inlet 514 of the anechoic communicating device and the right pipe flap air inlet 524 of the anechoic communicating device by means of the second anechoic chamber II 112, and the air inlet pipe air inlet 41 of the air outlet pipe 4 is matched with a connector air outlet formed by matching the left pipe flap air outlet 515 of the anechoic communicating device and the right pipe flap air outlet 525 of the anechoic communicating device; a relief recess 16 is formed in front of the right side wall of the housing 1 and along the height direction of the housing 1.

As shown in fig. 1, a first muffling chamber oil drip hole i 1111 is formed in a bottom wall of the first muffling chamber i 111, a second muffling chamber oil drip hole ii 1121 is formed in a bottom wall of the second muffling chamber ii 112, and an oil introduction port 15 (also referred to as "oil drip port") is formed in an outer wall of a bottom portion of the housing 1 at a position corresponding to both the first muffling chamber oil drip hole i 1111 and the second muffling chamber oil drip hole ii 1121, and the first muffling chamber oil drip hole i 1111 and the second muffling chamber oil drip hole ii 1121 are communicated with the oil introduction port 15.

A pair of right partition left edge insertion pieces 5111 is formed on the right side in the height direction of the sound-deadening chamber left partition 511, a space between the pair of right partition left edge insertion pieces 5111 is formed as a right partition left edge insertion groove 51111, and the left edge portion in the height direction of the sound-deadening chamber right partition 521 is fitted into the right partition left edge insertion groove 51111. Specifically, the silencing communicating vessel left and right pipe flaps 51 and 52 are fitted to face each other by the fitting of the left side edge portion in the height direction of the silencing chamber right partition 521 into the right partition left side edge insertion groove 51111, and are defined by the fitting of the silencing chamber left and right partitions 511 and 521 into the silencing chamber left and right partition insertion grooves 121 and 131, respectively.

A flap outlet insert ferrule 21 is extended from the downwardly facing side of the housing cover 2 at a position corresponding to the outlet-pipe inlet 41 of the outlet pipe 4, and the silencing communicating vessel left flap outlet 515 and the silencing communicating vessel right flap outlet 525 are inserted into the flap outlet insert ferrule cavity 211 of the flap outlet insert ferrule 21 in a state of being fitted face-to-face with each other.

A filter screen limiting step 411 is formed on the inner wall of the outlet pipe inlet 41 of the outlet pipe 4 and at the boundary with the pipe flap outlet insert pipe head 21, and a filter screen 6 is provided between the filter screen limiting step 411 and the top end surface of the silencing communicating vessel left pipe flap outlet 515 and the silencing communicating vessel right pipe flap outlet 525 which are fitted face to face with each other.

A silencing chamber partition plate insertion groove 22 is formed in the downward side of the housing cover 2 at a position corresponding to the upper end of the silencing chamber left partition plate 511 and the upper end of the silencing chamber right partition plate 521, respectively, and the silencing chamber partition plate insertion groove 22 is fitted to the upper end edge of the silencing chamber left partition plate 511 and the upper end edge of the silencing chamber right partition plate 521.

A mount positioning flange 43 is formed on the outer wall of the lower end of the outlet pipe 4 at positions corresponding to each other in the front-rear direction.

A through casing upper end edge caulking groove 23 is formed at the downward side of the casing cover 2 and at the position corresponding to the upper end peripheral edge of the casing 1, and the casing upper end edge caulking groove 23 is matched with the casing upper end edge 17 of the casing 1 in a matching way; a case fitting leg 18 is formed on each of the left and right upper portions of the outer wall of the case 1, a fitting leg catch 24 is formed on each of the left and right sides of the case cover 2 at a position corresponding to the case fitting leg 18, and the case fitting leg 18 is fitted to the fitting leg catch 24.

Refrigerant gas from the air outlet of the compressor cylinder enters from an air inlet pipe air inlet 32 of an air inlet pipe 3, is led out to a second silencing chamber II 112 from an air inlet pipe air outlet 31 of the air inlet pipe 3, is silenced by the second silencing chamber II 112, the gas in the second silencing chamber II 112 enters from left and right pipe flap air inlets 514 and 524 of a silencing communicating device into left and right pipe flap cavities 512 and 522 of the silencing communicating device and is silenced by a first silencing chamber I111 under the effect that air outlet silencing holes 513 and 523 on the side parts of the left and right pipe flaps are communicated with the first silencing chamber I111, and the gas is led into an air outlet pipe air inlet 41 from a communicating device air outlet formed by the cooperation of left and right pipe flap air outlets 515 and 525 of the silencing communicating device and is led into the air inlet of the compressor cylinder (namely an air inlet of the compressor cylinder) from an air outlet pipe air outlet 42, and the cycle is carried out.

To sum up, the technical solution provided by the present invention remedies the defects in the prior art, successfully completes the invention task, and faithfully embodies the technical effects mentioned in the above technical effect column by the applicant.

Claims (10)

1. A suction muffler for a small refrigeration compressor, comprising a casing (1), the casing (1) having a muffler chamber (11); the shell cover (2) is matched with the upper part of the shell (1) in a covering way, and the upper cavity opening part of the silencing cavity (11) is sealed; the silencer is characterized by further comprising a silencing and enhancing mechanism (5), the silencing and enhancing mechanism (5) is inserted into the silencing and enhancing mechanism (11) and divides the silencing cavity (11) into a first silencing chamber I (111) and a second silencing chamber II (112) which are communicated with each other by the silencing and enhancing mechanism (5), the air outlet (31) of the air inlet pipe is communicated with the second silencing chamber II (112), and the air outlet pipe (41) is communicated with the first silencing chamber I (111).

2. Suction muffler for a small sized refrigerating compressor according to claim 1, characterized in that a pair of muffling chamber left partition insert (12) parallel to each other is formed on and along the height direction of the muffling chamber left wall of said muffling chamber (11), and a pair of parallel right baffle inserting strips (13) of the silencing chamber are formed on the right wall of the silencing chamber (11) along the height direction of the right wall of the silencing chamber, the position of the right clapboard inserted bar (13) of the anechoic chamber corresponds to the position of the left clapboard inserted bar (12) of the anechoic chamber, and a pair of silencing chamber partition bottom inserts (14) formed on the bottom wall of the silencing chamber (11) connects the lower ends of a pair of silencing chamber left partition inserts (12) and a pair of silencing chamber right partition inserts (13), the space between the pair of silencing chamber left partition inserts (12) is a silencing chamber left partition slot (121), the space between the pair of silencing chamber right partition inserts (13) is a silencing chamber right partition slot (131), the right baffle slot (131) of the anechoic chamber corresponds to the left baffle slot (121) of the anechoic chamber, the space between the pair of bottom inserting strips (14) of the anechoic chamber baffle is formed as a bottom slot (141) of the anechoic chamber baffle, the left end of a bottom slot (141) of the baffle plate of the anechoic chamber is connected and communicated with a left baffle plate slot (121) of the anechoic chamber, the right end of a bottom slot (141) of the sound-deadening chamber partition plate is connected and communicated with a right partition plate slot (131) of the sound-deadening chamber; the silencing synergistic mechanism (5) is simultaneously inserted and matched with the silencing chamber left partition plate slot (121), the silencing chamber right partition plate slot (131) and the silencing chamber partition plate bottom slot (141).

3. The suction muffler for a small refrigerant compressor according to claim 2, wherein the silencing enhancing mechanism (5) comprises a silencing communicating vessel left leg (51) and a silencing communicating vessel right leg (52), a silencing chamber left partition (511) is formed in a longitudinal state in the middle of the silencing communicating vessel left leg (51), the left side edge portion in the height direction of the silencing chamber left partition (511) is fitted in insertion into the silencing chamber left partition insertion groove (121), the edge portion of the lower end of the silencing chamber left partition (511) is fitted in insertion into the left end of the silencing chamber partition bottom insertion groove (141), the rear end of the silencing communicating vessel left leg (51) is located in the first silencing chamber I (111), the front end of the silencing communicating vessel left tube flap (51) is positioned in the second silencing chamber II (112), a left tube flap side air outlet and silencing hole (513) for communicating a silencing communicating vessel left tube flap cavity (512) of the silencing communicating vessel left tube flap (51) with the first silencing chamber I (111) of the silencing cavity (11) of the shell (1) is formed in the rear end of the silencing communicating vessel left tube flap (51) and the rear side of the silencing chamber left partition plate (511), a silencing communicating vessel left tube flap air inlet (514) of the silencing communicating vessel left tube flap (51) is positioned on the upper part of the front end of the silencing communicating vessel left tube flap (51), a silencing communicating vessel left tube flap air outlet (515) of the silencing communicating vessel left tube flap (51) is positioned on the silencing communicating vessel left tube flap (51) A silencing chamber right partition plate (521) is formed in the middle of the silencing communicating device right tube flap (52) and in a longitudinal state at a position corresponding to the silencing chamber left partition plate (511), the left edge part in the height direction of the silencing chamber right partition plate (521) is inserted into the right side of the silencing chamber left partition plate (511), the edge part in the right side in the height direction of the silencing chamber right partition plate (521) is inserted into the silencing chamber right partition plate insertion groove (131), the edge part at the lower end of the silencing chamber right partition plate (521) is inserted into the right end of the silencing chamber partition plate bottom insertion groove (141), the rear end of the right pipe flap (52) of the silencing communicating device is positioned in the first silencing chamber I (111), the front end of the right pipe flap (52) of the silencing communicating device is positioned in the second silencing chamber II (112), a right pipe flap air outlet silencing hole (523) used for communicating a right pipe flap cavity (522) of the right pipe flap (52) of the silencing communicating device with the first silencing chamber I (111) of the silencing chamber (11) is formed in the rear end of the right pipe flap (52) of the silencing communicating device and positioned at the rear side of a right partition plate (521) of the silencing chamber, the right pipe flap air outlet silencing hole (523) corresponds to the left pipe flap air outlet silencing hole (513), and a right pipe flap air inlet (524) of the right pipe flap (52) of the silencing communicating device is positioned in the silencing connecting hole The upper part of the front end of the vent right pipe clack (52) is in face-to-face fit with the silencing communicating device left pipe clack air inlet (514), and the silencing communicating device right pipe clack air outlet (525) of the silencing communicating device right pipe clack (52) is positioned at the upper part of the rear end of the silencing communicating device right pipe clack (52) and is in face-to-face fit with the silencing communicating device left pipe clack air outlet (515); the downward side of the shell cover (2) is matched with the left partition board (511) of the silencing chamber and the right partition board (521) of the silencing chamber at the positions corresponding to the upper ends of the left partition board (511) of the silencing chamber and the right partition board (521) of the silencing chamber at the same time, an air inlet pipe air outlet (31) of the air inlet pipe (3) is communicated with a communicator air inlet formed by matching the silencing communicator left pipe flap air inlet (514) and the silencing communicator right pipe flap air inlet (524) through the second silencing chamber II (112), and an air outlet pipe air inlet (41) of the air outlet pipe (4) is matched with a communicator air outlet formed by matching the silencing communicator left pipe flap air outlet (515) and the silencing communicator right pipe flap air outlet (525); a recess (16) is formed in front of the right side wall of the housing (1) and along the height of the housing (1).

4. The suction muffler of a small-sized refrigerating compressor according to claim 1, 2 or 3, wherein a first muffling chamber oil dropping hole I (1111) is formed in a bottom wall of the first muffling chamber I (111), a second muffling chamber oil dropping hole II (1121) is formed in a bottom wall of the second muffling chamber II (112), an oil guide port (15) is formed in an outer wall of a bottom of the housing (1) at a position corresponding to the first muffling chamber oil dropping hole I (1111) and the second muffling chamber oil dropping hole II (1121), and the first muffling chamber oil dropping hole I (1111) and the second muffling chamber oil dropping hole II (1121) communicate with the oil guide port (15).

5. The suction muffler of a small refrigerant compressor according to claim 3, wherein a pair of right partition left edge insertion beads (5111) are formed at the right side of the sound-deadening chamber left partition (511) in the height direction, a space between the pair of right partition left edge insertion beads (5111) is formed as a right partition left edge insertion groove (51111), and a left edge portion of the sound-deadening chamber right partition (521) in the height direction is fitted into the right partition left edge insertion groove (51111).

6. The suction muffler for a small refrigerant compressor as claimed in claim 3, wherein a valving outlet insert boss (21) is extended at a side of said housing cover (2) facing downward and at a position corresponding to the outlet duct air inlet (41) of said outlet duct (4), and said muffling communicating vessel left-valving outlet (515) and the muffling communicating vessel right-valving outlet (525) are inserted into the valving outlet insert boss chamber (211) of the valving outlet boss (21) in a state of face-to-face engagement with each other.

7. The suction muffler of a small type refrigerating compressor as set forth in claim 6, wherein a filter net defining step (411) is formed on an inner wall of the outlet pipe inlet (41) of said outlet pipe (4) at a boundary portion with said valve outlet insert fitting stub (21), and a filter net (6) is provided between a top end surface of said silencing communicating vessel left valve outlet (515) and silencing communicating vessel right valve outlet (525) which are fitted to each other face to face and said filter net defining step (411).

8. The suction muffler for a small refrigerant compressor according to claim 3, wherein a muffling chamber partition caulking groove (22) is formed in each of the downward-facing side of the housing cover (2) at a position corresponding to the upper ends of the muffling chamber left partition (511) and the muffling chamber right partition (521), respectively, and the muffling chamber partition caulking groove (22) is fitted to the upper end edge portion of the muffling chamber left partition (511) and the muffling chamber right partition (521).

9. Suction muffler for small-sized refrigerating compressors according to claim 1 or 2 or 3 or 6 or 7, characterized in that a mount-positioning flange (43) is formed on the outer wall of the lower end of said outlet duct (4) at positions corresponding to each other in the front-rear direction.

10. Suction muffler for a small refrigeration compressor according to claim 1, characterized in that a through case upper edge caulking groove (23) is formed at a side of said case cover (2) facing downward and at a position corresponding to a peripheral edge of an upper end of said case (1), the case upper edge caulking groove (23) is fitted with the case upper edge (17) of the case (1); the left side and the right side of the outer wall of the shell (1) are respectively provided with a shell embedded foot (18), the left side and the right side of the shell cover (2) are respectively provided with an embedded foot buckle (24) at the position corresponding to the shell embedded foot (18), and the shell embedded foot (18) is matched with the embedded foot buckle (24) in a clamping way.

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