CN101446284A

CN101446284A - Reciprocating sealed compressor

Info

Publication number: CN101446284A
Application number: CNA2008102207523A
Authority: CN
Inventors: 陈忠华; 吴小凌; 陈会平; 沈海波; 吴丽华
Original assignee: GUANGZHOU REFRIGERATION CO Ltd
Current assignee: WanBao Group Compressor Co., Ltd.
Priority date: 2008-12-31
Filing date: 2008-12-31
Publication date: 2009-06-03
Anticipated expiration: 2028-12-31
Also published as: CN101446284B

Abstract

The invention provides a reciprocating sealed compressor, comprising a seal shell, a motor that is arranged in the sealed shell, a gas compressing device and an exhaust system, a cylinder block that fixes the motor, the gas compressing device and the exhaust system and connects the motor, the gas compressing device and the exhaust system with the sealed shell in an installation way by a spring; wherein, the gas compressing device comprises an air cylinder, a valve plate, a piston and a piston-rod, a cylinder head including a cylinder and a cylinder block connecting body. The compressor is characterized in that the exhaust system has a muffling structure with a tertiary expansion chamber; an air cylinder cover is a trilocular cylinder cover that is respectively provided with an induction chamber, an exhaust chamber and a primary expansion chamber which respectively form an induction cavity, an exhaust cavity and a primary expansion cavity after the trilocular cylinder cover is combined with the valve plate; a secondary expansion cavity is formed by a secondary expansion chamber arranged at the cylinder head and the valve plate; the tertiary expansion cavity is arranged on the cylinder block; the primary, secondary and tertiary expansion cavities are communicated mutually; the primary expansion cavity is communicated with the exhaust cavity; an exhaust pipe is communicated with the tertiary expansion cavity. The expansion cavity of the invention has the advantages that the muffling levels are numerous, the gas pulsation is small, the vibration noise of the compressor is low, and the production cost is low.

Description

A kind of reciprocating sealed compressor

Technical field

The present invention relates to a kind of reciprocating hermetic compressor.

Background technique

Existing a kind of reciprocating sealed compressor as shown in Figure 5, it has can 5 and 50, in

can

5 and 50, has the motor of forming by motor stator 32 and rotor 35, gas compressing apparatus and vent systems, one cylinder block 15 is with motor, gas compressing apparatus is fixed with vent systems and is connected with can 50 installations by spring 51, gas compressing apparatus comprises cylinder 3, valve plate 6, piston 1, piston rod 31, include the cylinder head and cylinder block 15 disjunctors of cylinder 3, valve plate 6 is with cylinder 3 glands, the crankshaft installed hole is established at cylinder block 15 middle parts, bent axle 36 passes the crankshaft installed hole, one end of bent axle 36 has eccentric shaft 33, piston rod 31 is connected eccentric shaft 33 with pistons 1 in placing cylinder 3, motor stator 32 is fixedly mounted on the cylinder block 15, rotor 35 is fixedly installed on the bent axle 36, cylinder head 8 is formed air aspiration cavity and exhaust cavity with valve plate 6, valve plate 6 is provided with suction port that is communicated with air aspiration cavity and the exhaust port that is communicated with exhaust cavity, the suction port place establishes suction valve chip, the exhaust port place establishes the outlet valve group, and the vent systems that includes expansion chamber is connected to exhaust cavity.

In existing this sealed refrigeration compressor, adopt one-level or compound expansion chamber vent systems.

Adopt one-level expansion chamber noise reduction vent systems as shown in Figure 1, cylinder head 8 is formed air aspiration cavity 7 and exhaust cavity 11 with valve plate 6, valve plate 6 is provided with suction port 9 that is communicated with air aspiration cavity 7 and the exhaust port 16 that is communicated with exhaust cavity 11, suction port 9 places establish suction valve chip 4, exhaust port 16 places establish outlet valve group 10, open second exhaust passage 12 at the valve plate 6 at exhaust cavity 11 places, establish one-level expansion chamber 14 on the cylinder block 15, cylinder head is established an exhaust passage 13 valve plate second exhaust passage 12 is communicated with one-level expansion chamber 14, the noise reduction lid 17 that is connected with outlet pipe 18 constitutes the one-level expansion chamber with one-level expansion chamber 14 cap seals

During work, the to-and-fro motion of piston 1 is also compressed after exhaust port 16 is discharged from suction port 9 suction gases, the pressurized gas of discharging enter exhaust cavity 11 through valve plate exhaust passage 16, enter one-level expansion chamber 14 again behind valve plate second exhaust passage 12, cylinder head exhaust passage 13, post-decompression gas is discharged compressor through outlet pipe 18 again.

The advantage of this structure is simple in structure, compact, and its shortcoming is: pressurized gas are only just directly discharged compressor by the one-level expansion chamber, and the gas decompression is not enough, and the compressor airflow pulsation is big, and vibration, noise are big.

Adopt compound expansion chamber noise reduction vent systems as shown in Figure 2, on the basis of above-mentioned one-level expansion noise reduction, increase the compound expansion chamber, its structure is: cylinder head 8 is formed air aspiration cavity 7 and exhaust cavity 11 with valve plate 6, valve plate 6 is provided with suction port 9 that is communicated with air aspiration cavity 7 and the exhaust port 16 that is communicated with exhaust cavity 11, suction port 9 places establish suction valve chip 4, exhaust port 16 places establish outlet valve group 10, open second exhaust passage 12 at the valve plate 6 at exhaust cavity 11 places, establish one-level expansion chamber 14 and compound expansion chamber 22 on the cylinder block 15, cylinder head is established an exhaust passage 13 valve plate second exhaust passage 12 is communicated with one-level expansion chamber 14, one-level expansion chamber 14 and compound expansion chamber 22 are communicated with by cylinder block exhaust passage 23, one-level noise reduction lid 17 constitutes the one-level expansion chamber with one-level expansion chamber 14 cap seals, and the secondary noise reduction lid 24 that is connected with outlet pipe 18 constitutes the compound expansion chamber with compound expansion chamber 22 cap seals.

During work, the to-and-fro motion of piston 1 is also compressed after exhaust port 16 is discharged from suction port 9 suction gases, the pressurized gas of discharging enter exhaust cavity 11 through valve plate exhaust passage 16, behind valve plate second exhaust passage 12, cylinder head exhaust passage 13, enter the one-level expansion chamber again, enter second level expansion chamber through cylinder block exhaust passage 23 again, post-decompression gas is discharged compressor through outlet pipe 18 again.

Its shortcoming is: the first, and expansion chamber progression is few, causes gas big easily, and vibration of compressor, noise are big; The second, the cost height has increased the noise reduction lid and has fixed the parts such as screw that noise reduction is covered, and the material of forming the cylinder block part in compound expansion chamber.

Summary of the invention

The purpose of this invention is to provide a kind of reciprocal compressor with three grades of expansion chamber noise reduction vent systems, its can reduce compressor gas, reduce the noise and vibration of compressor, to improve compressor performance.

Purpose of the present invention can realize by following technical solution:

A kind of reciprocating sealed compressor, it has can, in can, has the motor of forming by motor stator and rotor, by above-mentioned electric motor driven gas compressing apparatus and vent systems, one cylinder block is with motor, gas compressing apparatus is fixed with vent systems and is connected with the can installation by spring, gas compressing apparatus comprises cylinder, valve plate, piston, piston rod, include the cylinder head and the cylinder block disjunctor of cylinder, the crankshaft installed hole is established at the cylinder block middle part, bent axle passes the crankshaft installed hole, one end of bent axle has eccentric shaft, piston rod is connected eccentric shaft with piston in placing cylinder, motor stator is fixedly mounted on the cylinder block, rotor is fixedly installed on the bent axle, it is characterized in that described vent systems is a kind of noise-reducing structure with three grades of expansion chambers:

Cylinder head is three Room cylinder head, is respectively equipped with induction chamber, exhaust chamber and one-level expansion chamber, its with constitute air aspiration cavity, exhaust cavity and first order expansion chamber respectively after valve plate combines; Second level expansion chamber is made of compound expansion chamber and the valve plate of being located at cylinder head, third level expansion chamber is by being located on the cylinder block three grades of expansion chambers and three grades of noise reductions lids constitute, first order expansion chamber and exhaust cavity are communicated with by the cylinder cap exhaust port, second level expansion chamber and first order expansion chamber are communicated with by valve plate second exhaust passage, third level expansion chamber is communicated with second level expansion chamber by the cylinder body exhaust passage, and outlet pipe is connected in three grades of noise reductions and covers with third level expansion chamber and be communicated with.

During work, the to-and-fro motion of piston sucks gas from suction port and also compresses after exhaust port is discharged, the pressurized gas of discharging enter exhaust cavity through the valve plate exhaust passage, again through entering first order expansion chamber behind the cylinder cap exhaust passage, enter the compound expansion chamber through valve plate second exhaust passage again, enter third level expansion chamber through the cylinder block exhaust passage again, post-decompression gas is discharged compressor through outlet pipe again.

Substantive distinguishing features of the present invention and remarkable progress are:

1. vent systems of the present invention has three grades of noise reduction expansion chambers, and noise reduction progression is many, and gas is little, and the vibration of compressor, noise are reduced greatly;

2. exhaust system structure of the present invention is reasonable, low cost of manufacture, make full use of cylinder head and cylinder head the noise reduction expansion chamber is set, good muffling effect not only, and compare with the vent systems with the noise reduction of one-level expansion chamber and additionally not increase part, lack than exhaust system part with the noise reduction of compound expansion chamber.

Description of drawings

Fig. 1 is the one-level expansion chamber noise reduction vent systems schematic representation that refrigeration compressor adopts in the prior art;

Fig. 2 is the compound expansion chamber noise reduction vent systems schematic representation that refrigeration compressor adopts in the prior art;

Fig. 3 is three grades of expansion chamber noise reduction vent systems schematic representation that refrigeration compressor of the present invention adopts;

Fig. 4 is a structural representation of the present invention (bow and analyse and observe);

Fig. 5 is a structural representation of the present invention (side is analysed and observe).

Embodiment

With reference to figure 3, Fig. 4 and Fig. 5, a kind of reciprocating sealed compressor provided by the invention, it has the can of being made up of lower shell body 50 and upper shell 5, in can, has the motor of forming by motor stator 32 and rotor 35, by above-mentioned electric motor driven gas compressing apparatus and vent systems, one cylinder block 15 is with motor, gas compressing apparatus is fixed with vent systems and is connected with lower shell body 50 installations of can by spring 51, gas compressing apparatus comprises cylinder 3, valve plate 6, piston 1, piston rod 31, include the cylinder head 2 and cylinder block 15 disjunctors of cylinder 3, the crankshaft installed hole is established at cylinder block 15 middle parts, bent axle 36 passes the crankshaft installed hole, one end of bent axle 36 has eccentric shaft 33, piston rod 31 is connected eccentric shaft 33 with pistons 1 in placing cylinder 3, motor stator 32 is fixedly mounted on the cylinder block 15, rotor 35 is fixedly installed on the bent axle 36, bent axle is provided with equilibrium block 34, it is characterized in that described vent systems is a kind of noise-reducing structure with three grades of expansion chambers:

Cylinder head 8 is three Room cylinder head, is respectively equipped with induction chamber 7, exhaust chamber 11 and one-level expansion chamber 19, its with constitute air aspiration cavity, exhaust cavity and first order expansion chamber respectively after valve plate 6 combines; Second level expansion chamber is made of the compound expansion chamber 21 of being located at cylinder head 2 and valve plate 6, third level expansion chamber is by being located on the cylinder block 15 three grades of expansion chambers 14 and three grades of noise reductions lids 17 constitute, first order expansion chamber and exhaust cavity are communicated with by cylinder cap exhaust port 20, second level expansion chamber and first order expansion chamber are communicated with by valve plate second exhaust passage 12, third level expansion chamber is communicated with second level expansion chamber by cylinder body exhaust passage 13, and outlet pipe 18 is connected on three grades of noise reduction lids 17 and is communicated with third level expansion chamber.

During work, piston 1 to-and-fro motion under the driving of motor, cylinder 3 sucks gas and compression, pressurized gas after compression from suction port 9, enter exhaust cavity 11 through valve plate exhaust passage 16, enter first order expansion chamber (19,6) through cylinder cap exhaust passage 20 again, enter second level expansion chamber (21 through valve plate second exhaust passage 12 again, 6), again by entering third level expansion chamber (14,17) behind the cylinder block exhaust passage 13 again, after outlet pipe 18 is discharged compressor.

Through test because expansion chamber noise reduction progression of the present invention is many, during compressor operating gas little, vibration, noise are little.

Claims

1. reciprocating sealed compressor, it has can, in can, has motor, gas compressing apparatus and vent systems, one cylinder block is with motor, gas compressing apparatus is fixed with vent systems and is connected with the can installation by spring, gas compressing apparatus comprises cylinder, valve plate, piston, piston rod, include the cylinder head and the cylinder block disjunctor of cylinder, the crankshaft installed hole is established at the cylinder block middle part, bent axle passes the crankshaft installed hole, one end of bent axle has eccentric shaft, piston rod is connected eccentric shaft with piston in placing cylinder, motor stator is fixedly mounted on the cylinder block, rotor is fixedly installed on the bent axle, it is characterized in that described vent systems is a kind of noise-reducing structure with three grades of expansion chambers: cylinder head is three Room cylinder head, be respectively equipped with induction chamber, exhaust chamber and one-level expansion chamber, its with constitute air aspiration cavity respectively after valve plate combines, exhaust cavity and first order expansion chamber; Second level expansion chamber is made of compound expansion chamber and the valve plate of being located at cylinder head, third level expansion chamber is located on the cylinder block, first order expansion chamber, second level expansion chamber and third level expansion chamber are interconnected, and first order expansion chamber is communicated with exhaust cavity, and outlet pipe is communicated with third level expansion chamber.

2. reciprocating sealed compressor as claimed in claim 1 is characterized in that: second level expansion chamber and first order expansion chamber are communicated with by valve plate second exhaust passage.

3. reciprocating sealed compressor as claimed in claim 1 or 2, it is characterized in that: third level expansion chamber is made of three grades of expansion chambers and three grades of noise reduction lids of being located on the cylinder block, third level expansion chamber is communicated with second level expansion chamber by the cylinder body exhaust passage, and outlet pipe is connected in three grades of noise reductions and covers with third level expansion chamber and be communicated with.