CN111810378B

CN111810378B - Double-machine compressor and refrigerating system

Info

Publication number: CN111810378B
Application number: CN202010582250.6A
Authority: CN
Inventors: 莫子扬; 冯海; 徐敏; 陈娟娟; 邓聪聪; 何杰伟
Original assignee: Gree Green Refrigeration Technology Center Co Ltd of Zhuhai
Current assignee: Gree Green Refrigeration Technology Center Co Ltd of Zhuhai
Priority date: 2020-06-23
Filing date: 2020-06-23
Publication date: 2022-04-26
Anticipated expiration: 2040-06-23
Also published as: CN111810378A

Abstract

The invention belongs to the field of compressors, and particularly discloses a double-compressor, which comprises a first compressor and a second compressor which are oppositely arranged, wherein: the first compressor comprises a first cylinder cover, the second compressor comprises a second cylinder cover, the first cylinder cover and the second cylinder cover integrally form an integral cylinder cover, and an exhaust passage is formed in the integral cylinder cover; the air inlet end of the exhaust channel is communicated with the exhaust side of the first compressor, and the air outlet end of the exhaust channel is communicated with the air suction side of the second compressor; the exhaust gas of the first compressor can directly enter the second compressor through the exhaust passage; when the first compressor and the second compressor run simultaneously, gas enters the second compressor through the exhaust passage for secondary compression after being subjected to primary compression in the first compressor. The double-machine compressor can realize a structure of freely switching single and double stages along with working conditions, the arrangement directions of the double machines are in an opposite structure, the double-machine cylinder head assemblies are integrally connected, and the structure is compact.

Description

Double-machine compressor and refrigerating system

Technical Field

The invention belongs to the field of compressors, and particularly relates to a double-machine compressor and a refrigerating system.

Background

At present, with the improvement of living standard and quality, more and more refrigerator systems have put forward application requirements such as independent temperature control, deep freezing below-33 ℃, high energy efficiency and the like. The requirement of independent temperature control of the refrigeration system can be realized by independent temperature control of a multi-evaporation temperature system, namely the refrigeration system is required to have a plurality of evaporation pressures, and the compressor is also required to have a corresponding multi-stage compression function. However, related products of double-stage compression are not found in the field of household piston compressors in the industry at present, mainly single-stage double-cylinder compressors are used, and single-stage and double-stage compressors cannot be freely switched along with working conditions.

The present invention has been made in view of the above circumstances.

Disclosure of Invention

The invention aims to solve the technical problem of providing a compressor structure with double-machine double-cylinder double-stage compression, wherein a single-double-stage freely switching structure along with working conditions is adopted, the double-machine arrangement direction is an opposite structure, double-machine cylinder head assemblies are integrally connected, and the structure is compact.

In order to solve the above technical problem, the present invention discloses a dual compressor, comprising

A first compressor and a second compressor disposed in opposition, wherein:

the first compressor comprises a first cylinder cover, the second compressor comprises a second cylinder cover, the first cylinder cover and the second cylinder cover are integrally formed into an integral cylinder cover, and an exhaust passage is formed in the integral cylinder cover; the air inlet end of the exhaust channel is communicated with the exhaust side of the first compressor, and the air outlet end of the exhaust channel is communicated with the air suction side of the second compressor; the exhaust gas of the first compressor can directly enter the second compressor through the exhaust passage;

when the first compressor and the second compressor run simultaneously, gas enters the second compressor through the exhaust passage for secondary compression after being subjected to primary compression in the first compressor.

Further optionally, a second exhaust cavity is formed on one side of the integral cylinder cover close to the second compressor, an exhaust through hole is formed in the second compressor, and the second exhaust cavity is communicated with the exhaust through hole;

when the second compressor operates alone or the first compressor and the second compressor operate simultaneously, the exhaust gas of the second compressor enters the second exhaust cavity and then is discharged out of the secondary compressor through the exhaust through hole.

Further optionally, the first compressor comprises a first cylinder block and a first suction muffler; a first compression cavity is arranged in the first cylinder seat and is communicated with an exhaust port of the first air suction muffler; the first air suction silencer is connected with an air suction pipe; the inlet of the exhaust passage is communicated with the first compression cavity;

when the first compressor and the second compressor run simultaneously, gas entering from the gas suction pipe enters the first compression cavity for first-stage compression after being subjected to silencing treatment by the first gas suction silencer; and the gas after the first-stage compression enters the second compressor through the exhaust passage to be subjected to second-stage compression.

Further optionally, the second compressor comprises a second cylinder block and a second suction muffler; a second compression cavity is arranged in the second cylinder seat and is communicated with a first-stage exhaust inlet of the second suction muffler; the outlet of the exhaust passage is communicated with the secondary suction inlet of the second suction muffler; an air supplementing port is arranged on the second air suction muffler;

when the first compressor and the second compressor run simultaneously, the exhaust gas from the first compressor enters the second suction muffler from the exhaust passage, the exhaust gas and the gas entering the second suction muffler from the air supplementing port are subjected to mixing and silencing treatment in the second suction muffler, and the gas subjected to mixing and silencing treatment enters the second compression cavity for secondary compression; when the second compressor operates independently, the gas entering the second suction muffler from the air supplementing port enters the second compression cavity for compression after being subjected to silencing treatment in the second suction muffler.

Further optionally, the integral cylinder head is formed with a first discharge chamber at an inlet of the discharge passage, and discharge air of the first compression chamber enters the discharge passage through the first discharge chamber.

Further optionally, the one-piece cylinder head is formed with a first avoidance space at an outlet of the exhaust passage;

the second air suction silencer is provided with a gas guide part, an air inlet passage and an air outlet passage are arranged in the gas guide part, the first-stage exhaust inlet is formed in one side, facing the exhaust channel, of the air inlet passage, and the second-stage air suction inlet is formed in one side, facing the second compression cavity, of the air outlet passage; the first-stage exhaust inlet and the second-stage suction inlet are arranged in a back-to-back mode and are connected into a whole;

the first-stage exhaust inlet and the second-stage suction inlet are both positioned in the first avoidance space, the first-stage exhaust inlet faces the outlet of the exhaust channel and is communicated with the exhaust channel, and the second-stage suction inlet faces the second compression cavity and is communicated with the second compression cavity; the second exhaust cavity is formed above the first avoidance space.

Further optionally, a second avoiding space is formed below the first exhaust cavity by the integral cylinder head, the exhaust port is located in the second avoiding space, and the exhaust port faces the first compression cavity and is communicated with the first compression cavity.

Further optionally, a first valve assembly is arranged between the first compressor and the integral cylinder head, and the first valve assembly is provided with a first air flow passage for communicating the exhaust port with the first compression chamber and a second air flow passage for communicating the first compression chamber with the first exhaust chamber;

and the gas exhausted from the exhaust port enters the first compression cavity through the first air flow passage to be compressed and then enters the first exhaust cavity through the second air flow passage.

Further optionally, the first valve assembly includes a first cylinder head gasket, a first valve plate, a first suction valve plate, and a first suction valve plate gasket, which are sequentially arranged along a direction from the integral cylinder head to the first cylinder base;

a first cylinder head gasket air suction port is arranged at the position of the first cylinder head gasket corresponding to the air exhaust port, and a first cylinder head gasket air exhaust port is arranged at the position of the first cylinder head gasket corresponding to the first air exhaust cavity;

a first valve plate air suction port is arranged at a position of the first valve plate corresponding to the first cylinder head gasket air suction port, and a first valve plate air exhaust port is arranged at a position of the first valve plate corresponding to the first cylinder head gasket air exhaust port;

the first air suction valve plate is provided with a first air suction valve plate air suction port, the first air suction valve plate air suction port is provided with a first reed elastic piece capable of opening and closing the first air suction valve plate air suction port, and a first air suction valve plate air outlet is formed in the position, corresponding to the first valve plate air outlet, of the first reed elastic piece;

a first air suction valve plate gasket through hole communicated with the first compression cavity is formed in the first air suction valve plate gasket;

the first cylinder head gasket air suction port, the first valve plate air suction port, the first air suction valve plate air suction port and the first air suction valve plate gasket through hole form the first air flow passage; the first air suction valve plate gasket through hole, the first air suction valve plate air outlet, the first valve plate air outlet and the first cylinder head gasket air outlet form the second air flow passage.

Further optionally, the first valve plate is provided with a first exhaust valve plate for opening and closing the first valve plate exhaust port, and a first lift limiter matched with the first exhaust valve plate.

Further optionally, a second valve assembly is provided between the second compressor and the integral cylinder head; the second valve assembly is provided with a third airflow passage for communicating the secondary suction inlet with the second compression cavity, a fourth airflow passage for communicating the second compression cavity with the second exhaust cavity, and a fifth airflow passage for communicating the second exhaust cavity with the exhaust through hole;

and gas exhausted from the secondary suction inlet enters the second compression cavity through the third airflow passage to be compressed, then enters the second exhaust cavity through the fourth airflow passage, and finally is exhausted from the second compressor through the exhaust through hole through the fifth airflow passage from the second exhaust cavity.

Further optionally, the second valve assembly comprises a second cylinder head gasket, a second valve plate, a second suction valve plate and a second suction valve plate gasket, which are sequentially arranged along the direction from the integral cylinder head to the second cylinder block;

a second cylinder head gasket air suction port is arranged at the position of the second cylinder head gasket corresponding to the secondary air suction inlet, a second cylinder head gasket air exhaust port is arranged at the position corresponding to the second air exhaust cavity, and a second cylinder head gasket vent hole is arranged at the position corresponding to the air exhaust through hole;

a second valve plate air suction port is arranged at the position of the second valve plate corresponding to the second cylinder head gasket air suction port, a second valve plate exhaust port is arranged at the position corresponding to the second cylinder head gasket exhaust port, and a second valve plate vent hole is arranged at the position corresponding to the second cylinder head gasket vent hole;

a second air suction valve plate air suction port is formed in the second air suction valve plate, a second reed elastic piece capable of being opened and closed is arranged on the second air suction valve plate air suction port, a second air suction valve plate air outlet is formed in the position, corresponding to the second valve plate air outlet, of the second reed elastic piece, and a second air suction valve plate air vent is formed in the position, corresponding to the second valve plate air vent;

a second suction valve plate gasket through hole is formed in the position, corresponding to the opening of the second compression cavity, of the second suction valve plate gasket, and a second suction valve plate gasket vent hole is formed in the position, corresponding to the exhaust through hole, of the second suction valve plate gasket;

the second cylinder cover gasket air suction port, the second valve plate air suction port, the second air suction valve plate air suction port and the second air suction valve plate gasket through hole form the third air flow channel; the second suction valve plate gasket through hole, the second suction valve plate exhaust port, the second valve plate exhaust port and the second cylinder head gasket exhaust port form the fourth airflow channel; and the second cylinder cover gasket vent hole, the second valve plate vent hole, the second suction valve plate vent hole and the second suction valve plate gasket vent hole form the fifth airflow channel.

Further optionally, a second exhaust valve plate for opening and closing the second valve plate exhaust port and a second lift limiter matched with the second exhaust valve plate are arranged on the second valve plate.

Further optionally, an exhaust pipe is arranged on the second cylinder seat and communicated with the exhaust through hole.

The invention also provides a refrigerating system, and the refrigerating system is the double-machine compressor. After adopting the technical scheme, compared with the prior art, the invention has the following beneficial effects:

1. the double-machine compressor provided by the invention has a double-machine double-cylinder double-stage compression compressor structure, a single-double-stage freely switching structure along with working conditions, the double-machine arrangement direction is an opposite structure, and double-machine cylinder head assemblies are integrally connected, so that the structure is compact.

2. The integral cylinder cover 4 structure in the double-machine compressor has the advantages that the process of a two-stage gas circuit is simplified, the first-stage exhaust directly enters the second-stage air suction and noise reduction through the integral cylinder cover 4 structure, the structure is simple and easy to implement, and meanwhile, the functions of reducing parts of the compressor and reducing the cost are achieved.

3. The second suction muffler 32 in the dual-compressor of the invention has a brand new design, when the first stage and the second stage operate simultaneously, the first stage exhaust gas directly enters the second stage suction muffler for airflow buffering and expansion, thereby reducing the noise effect, and simultaneously, when the second stage operates independently, the muffler can still work normally.

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention, are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without limiting the invention to the right. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:

FIG. 1: is a structural diagram of the double-machine compressor of the embodiment of the invention;

FIG. 2: is a sectional view of the dual compressor of the embodiment of the invention;

fig. 3 and 4: the cross section of the integral cylinder cover of the double-machine compressor of the embodiment of the invention;

FIG. 5: is an explosion diagram of the dual compressor of the embodiment of the invention;

fig. 6 and 7: is a structural diagram of a second suction muffler of the dual compressor of the embodiment of the invention;

FIG. 8: the first valve component and the second valve component of the double-machine compressor are exploded diagrams;

FIG. 9: is an explosion diagram of the first valve plate and the second valve plate of the double-machine compressor of the embodiment of the invention.

FIG. 10: is a structural diagram of the second compressor of the two-compressor of the embodiment of the invention.

Wherein:

1. a housing; 21. a first cylinder block; 22. a first suction muffler; 23. a first-stage air inlet pipe; 211. a first compression chamber; 221. an exhaust port; 31. a second cylinder block; 32. a second suction muffler; 33. a gas supplementing pipe; 34. an inner calandria; 35. a secondary exhaust pipe; 311. a second compression chamber; 312. an exhaust through hole; 321. a primary exhaust inlet; 322. a secondary suction inlet; 323. an air supplement port; 324. a gas guide portion; 4. an integral cylinder head; 41. an exhaust passage; 42. a first exhaust cavity; 43. a second exhaust chamber; 44. a second avoidance space; 45. a first avoidance space; 5. a first valve assembly; 51. a first cylinder head gasket; 52. a first valve plate; 53. a first suction valve plate; 54. a first air suction valve plate gasket; 511. a first cylinder head gasket air suction port; 512. a first cylinder head gasket exhaust port; 521. a first valve plate suction port; 522. a first valve plate exhaust port; 523. a first exhaust valve plate; 524. a first lift stop; 531. sucking air by a first air sucking valve plate; 532. a first reed spring; 533. an exhaust port of the first air suction valve plate; 541. a gasket through hole of the first air suction valve plate; 6. a second valve assembly; 61. a second cylinder head gasket; 62. a second valve plate; 63. a second suction valve plate; 64. a second suction valve plate gasket; 611. a second head gasket suction port; 612. a second cylinder head gasket exhaust port; 613. a second cylinder head gasket vent; 621. a second valve plate air suction port; 622. a second valve plate exhaust port; 623. a second vent valve plate; 624. a second lift stop; 625. a second valve plate vent; 631. sucking by the second suction valve plate; 632. a second reed spring; 633. a second suction valve plate exhaust port; 634. a second suction valve plate vent hole; 641. a second suction valve plate gasket through hole; 642. and a second suction valve plate gasket vent hole.

It should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but to illustrate it by a person skilled in the art with reference to specific embodiments.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and the following embodiments are used for illustrating the present invention and are not intended to limit the scope of the present invention.

In the description of the present invention, it should be noted that the terms "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "contacting," and "communicating" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The embodiment discloses a double-machine compressor, as shown in fig. 1, fig. 2 and fig. 5, which specifically comprises a shell 1, wherein a first compressor and a second compressor are oppositely arranged in the shell 1, and the exhaust side of the first compressor is communicated with the suction side of the second compressor, so that the exhaust of the first compressor can directly enter the second compressor; when the first compressor and the second compressor run simultaneously, gas enters the second compressor for secondary compression after being subjected to primary compression in the first compressor. Specifically, the first compressor comprises a first cylinder cover, the second compressor comprises a second cylinder cover, the first cylinder cover and the second cylinder cover are integrally formed into an integral cylinder cover 4, and an exhaust passage 41 is formed in the integral cylinder cover 4; the air inlet end of the exhaust channel 41 is communicated with the exhaust side of the first compressor, and the air outlet end is communicated with the air suction side of the second compressor; the discharge air of the first compressor can directly enter the second compressor through the discharge passage 41; when the first compressor and the second compressor are operated simultaneously, the gas is compressed in the first compressor in the first stage and then enters the second compressor through the exhaust passage 41 to be compressed in the second stage.

The first compressor and the second compressor in this embodiment are connected by an integral cylinder head 4; the whole compressor can realize free switching of single and double stages along with working conditions, the second compressor can be independently operated and controlled, and can also be simultaneously operated and controlled with the first compressor, so that the compressor is applicable to different working condition requirements of a refrigeration system.

Further alternatively, the integral cylinder cover 4 is formed with a second exhaust cavity 43 at a side close to the second compressor, the second compressor is provided with an exhaust through hole 312, and the second exhaust cavity 43 is communicated with the exhaust through hole 312; when the second compressor operates alone or the first compressor and the second compressor operate simultaneously, the exhaust gas of the second compressor enters the second exhaust chamber 43 and is discharged out of the second compressor through the exhaust through hole 312. When the second compressor operates alone or the first compressor and the second compressor operate simultaneously, the exhaust gas of the second compressor enters the second exhaust chamber and is discharged out of the second compressor through the exhaust through hole 312.

Further alternatively, the first compressor comprises a first cylinder seat 21 and a first suction muffler 22; a first compression chamber 211 is arranged in the first cylinder seat 21, and the first compression chamber 211 is communicated with an exhaust port 221 of the first suction muffler 22; the first air suction muffler 22 is connected with an air suction pipe; the second compressor includes a second cylinder block 31 and a second suction muffler 32; a second compression cavity 311 is arranged in the second cylinder block 31, and the second compression cavity 311 is communicated with a first-stage exhaust inlet 321 of the second suction muffler 32;

the casing 1 is further provided with an air supply pipe 33, air supply gas entering from the air supply pipe 33 directly enters the cavity of the casing 1, an air supply port 323 on the second air suction muffler 32, and when the second compressor sucks air, the air supply gas is sucked into the second muffler 32 from the casing 1 and the air supply pipe 33 through the air supply port 323 to be mixed.

The inlet of the discharge passage 41 communicates with the first compression chamber 211, and the outlet communicates with the second suction inlet 322 of the second suction muffler 32; as shown in fig. 2-5, when the first compressor and the second compressor operate simultaneously, the gas entering from the gas suction pipe enters the first compression chamber 211 for first-stage compression after being muffled by the first gas suction muffler 22; the gas after the first-stage compression enters the second suction muffler 32 through the exhaust passage 41, and is mixed and silenced with the gas entering the second suction muffler 32 from the gas supplementing port 323 in the second suction muffler 32, and the gas after the mixed and silenced enters the second compression chamber 311 for second-stage compression.

The first compressor and the second compressor in this embodiment are connected by an integral cylinder head 4; when the first compressor and the second compressor are operated simultaneously, the first compressor enters the first suction muffler 22 by directly sucking air from the suction pipe, the suction air of the second compressor enters the second suction muffler 32 through the air supplement port 323 on one hand, and the exhaust air of the first-stage muffler enters the second suction muffler 32 through the exhaust passage 41 of the integral cylinder head 4 on the other hand to be mixed and sucked; when the second compressor operates independently, the air suction of the second compressor enters the second air suction silencer 32 from the air supply port 323, the second compressor operates independently, the whole compressor can realize free switching of single and double stages along with the working condition, the second compressor can operate and control independently, and when the compressor is applied to the field of refrigerators, the function of independent control of freezing and refrigerating of a refrigerator system can be realized.

Further alternatively, the first compressor and the second compressor are symmetrically arranged on two sides of the integral cylinder cover 4, and the exhaust passage 41 is formed by extending from one side close to the first compression cavity 211 to the direction close to the first-stage exhaust inlet 321.

The embodiment can optimize the arrangement space of a second compressor by arranging the first compressor and the second compressor in an opposite mode on two sides of the integral cylinder cover 4, space utilization and layout of the shell 1 are facilitated, meanwhile, the opposite layout is connected with a second stage, stability of the whole machine core is improved, vibration of the compressor can be effectively reduced, and the effect of reducing noise and vibration of the compressor is achieved.

Further alternatively, as shown in fig. 2, 3, 4, and 5, the integral cylinder head 4 is formed with a first discharge chamber 42 at an inlet of the discharge passage 41, and the discharge air of the first compression chamber 211 enters the discharge passage 41 through the first discharge chamber 42. First compressor is through being connected with whole cylinder head 4, the exhaust of first compression chamber 211 can directly pass through first exhaust chamber 42 on whole cylinder head 4, exhaust passage 41 gets into in the muffler of breathing in of second grade, the muffler 32 of breathing in of second like this both regard as one-level exhaust muffler chamber and the use of second muffler 32 of breathing in, thereby reducible exhaust muffler chamber structure, the lightweight design and the reduction material cost that do benefit to the compressor, the expansion of utilizing the second muffler 32 of breathing in mixes the amortization, can effectually reduce the pressure pulsation of one-level exhaust, reduce the exhaust noise of first compressor.

The integral cylinder head 4 is formed with a first escape space 45 at the outlet of the exhaust passage 41; as shown in fig. 6 and 7, the second suction muffler 32 is provided with a gas guide portion 324, a gas inlet passage and a gas outlet passage are provided in the gas guide portion 324, the gas inlet passage has a first-stage exhaust inlet 321 on a side facing the exhaust passage 41, and the gas outlet passage has a second-stage suction inlet 322 on a side facing the second compression chamber 311; the primary exhaust inlet 321 and the secondary suction inlet 322 are arranged oppositely and are connected into a whole; the primary exhaust inlet 321 and the secondary intake inlet 322 are both located in the first avoidance space 45, and the second exhaust chamber 43 is formed above the first avoidance space 45.

The arrangement of the first avoiding space 45 makes the connection between the whole cylinder head 4 and the second air suction muffler 32 and the second cylinder head 4 more compact, saves the internal space of the casing 1, and is beneficial to the space utilization and layout of the casing 1.

And the primary discharge inlet 321 faces the outlet of the discharge passage 41 and communicates with the discharge passage 41, and the secondary suction inlet 322 faces the second compression chamber 311 and communicates with the second compression chamber 311.

When a second compressor operates simultaneously, the exhaust gas of the first compressor enters the first-stage exhaust inlet 321 through the exhaust passage 41 and enters the second suction muffler 32, is mixed with the intermediate gas entering from the gas supplementing inlet in the muffler for muffling, and is sucked into the second compression chamber 311 through the second suction inlet 322 for compression; when the compressor is according to the operating mode demand of electrical apparatus, first compressor does not operate, and the second compressor independently operates, one-level exhaust inlet 321 communicates the first exhaust chamber 42 of whole cylinder head 4, and first exhaust chamber 42 can regard as the expansion volume chamber of the second silencer 32 of breathing in, and the amortization volume of the second silencer 32 of breathing in is increased, is favorable to the reduction of the noise of breathing in of second compressor to reduce the noise of complete machine.

The integral cylinder head 4 is formed with a first escape space 44 below the first exhaust chamber 42, an exhaust port 221 is located in the first escape space 44, and the exhaust port 221 faces the first compression chamber 211 and communicates with the first compression chamber 211. The arrangement of the first avoiding space 44 makes the connection between the integral cylinder head 4 and the first intake silencer 22 and the first cylinder head 4 more compact, saves the internal space of the housing 1, and is favorable for the space utilization and layout of the housing 1.

As shown in fig. 2, 3, 4 and 5, the integral cylinder head 4 is formed with a second discharge chamber 43 above the first escape space 44, the second compressor is provided with a discharge through hole 312, and as shown in fig. 10, the second discharge chamber 43 is respectively communicated with the discharge through hole 312 and the second compression chamber 311.

Further alternatively, as shown in fig. 2 and 5, a first valve assembly 5 is provided between the first compressor and the integral cylinder head 4, and the first valve assembly 5 is provided with a first air flow passage communicating the exhaust port 221 with the first compression chamber 211 and a second air flow passage communicating the first compression chamber 211 with the first exhaust chamber 42; the gas discharged from the gas discharge port 221 enters the first compression chamber 211 through the first gas flow path, is compressed, and then enters the first gas discharge chamber 42 through the second gas flow path.

Specifically, as shown in fig. 8, the first valve assembly 5 includes a first cylinder head gasket 51, a first valve plate 52, a first suction valve plate 53 and a first suction valve plate gasket 54, which are sequentially arranged along the direction from the integral cylinder head 4 to the first cylinder seat 21;

a first cylinder head gasket air suction port 511 is arranged at a position of the first cylinder head gasket 51 corresponding to the air exhaust port 221, and a first cylinder head gasket air exhaust port 512 is arranged at a position corresponding to the first exhaust cavity 42; a first valve plate suction port 521 is provided at a position of the first valve plate 52 corresponding to the first cylinder head gasket suction port 511, and a first valve plate discharge port 522 is provided at a position corresponding to the first cylinder head gasket discharge port 512; the first suction valve plate 53 is provided with a first suction valve plate suction 531, the first suction valve plate suction port 531 is provided with a first reed elastic sheet 532 capable of opening and closing the first suction valve plate suction port 531, and a first suction valve plate discharge port 533 is arranged at a position of the first reed elastic sheet 532 corresponding to the first valve plate discharge port 522; a first suction valve plate gasket through hole 541 communicated with the first compression cavity 211 is formed in the first suction valve plate gasket 54; a first air channel is formed by the first cylinder cover gasket air suction port 511, the first valve plate air suction port 521, the first air suction valve sheet air suction port 531 and the first air suction valve sheet gasket through hole 541; the first suction valve plate gasket through hole 541, the first suction valve plate exhaust port 533, the first valve plate exhaust port 522, and the first cylinder head gasket exhaust port 512 form a second air flow path.

As shown in the air flow direction with arrow lines in fig. 5, the refrigerant enters the first valve plate suction port 521 through the first cylinder head gasket suction port 511, the first reed valve plate opens the first suction valve plate suction port 531 under the action of the pressure difference, and the refrigerant enters the first compression cavity 211 through the first suction valve plate suction port 531 and the first suction valve plate gasket through hole 541. The condition that the first reed valve can be opened is as follows: setting an air suction area S1 of the first air suction valve plate, an air suction pressure P0, a pressure P1 in the first compression cavity and a sealing acting force F1 of the first reed valve plate; and (3) a gas suction process: when P1S 1+ F1< P0S 1, the first reed valve plate can be opened; when P1S 1+ F1 is more than or equal to P0S 1, the first reed valve plate is closed; the first reed valve is in a closed state in other processes (compression and exhaust processes).

As shown in fig. 8 and 9, the first valve plate 52 is provided with a first exhaust valve plate 523 that opens and closes the first valve plate exhaust port 522, and a first lift stopper 524 that engages with the first exhaust valve plate 523. As shown in the flow direction with an arrow line in fig. 5, the refrigerant is compressed into high-temperature and high-pressure gas through the first compression cavity 211, passes through the first suction valve plate gasket through hole 541 and the first-stage suction valve plate exhaust port 221, backs up the first exhaust valve plate to open the first valve plate exhaust port 522, and then enters the first exhaust cavity 42 from the first valve plate exhaust port 522 and the first cylinder head gasket exhaust port 512; the conditions under which the first exhaust valve sheet can be pushed open are: setting the exhaust port area S2, the exhaust pressure P2, the pressure in the first compression cavity P3 and the sealing acting force F2 of the exhaust valve plate; and (3) an exhaust process: when P3S 2> F + P2S 2, the first exhaust valve plate opens exhaust; when P3S 2 is not more than F + P2S 2, the first exhaust valve plate is closed; in other processes (suction process and compression process), the first exhaust valve plate is in a closed state.

The first lift limiter 524 is disposed behind the first exhaust valve plate 523 and is used for preventing the first exhaust valve plate 523 from deforming when the pressure applied to the first exhaust valve plate 523 is too large.

The first valve assembly 5 is arranged to form independent air flow paths for low-pressure refrigerant and high-pressure refrigerant among the first cylinder block 21, the first suction muffler 22 and the integral cylinder head 4, thereby ensuring the compression performance and stable operation of the first compressor. And, first discharge chamber 42 and first compression chamber 211 are not direct intercommunication, need to separate sealed through first valve module 5, only compressor exhaust process just direct intercommunication, first valve module 5 need separate sealed first discharge chamber 42 and first compression chamber 211 in compressor suction process and the compression process.

Further alternatively, as shown in fig. 2 and 5, a second valve assembly is provided between the second compressor and the integral cylinder head 4; the second valve assembly is provided with a third air flow passage for communicating the second-stage suction inlet 322 with the second compression chamber 311, a fourth air flow passage for communicating the second compression chamber 311 with the second discharge chamber 43, and a fifth air flow passage for communicating the second discharge chamber 43 with the discharge through hole 312; the gas discharged from the secondary suction inlet 322 enters the second compression cavity 311 through the third airflow path, is compressed, enters the second discharge cavity 43 through the fourth airflow path, and finally is discharged from the second compressor through the discharge through hole 312 through the fifth airflow path from the second discharge cavity 43.

Specifically, as shown in fig. 8, the second valve assembly includes a second cylinder head gasket 61, a second valve plate 62, a second suction valve plate 63, and a second suction valve plate gasket 64, which are sequentially arranged along the direction from the integral cylinder head 4 to the second cylinder block 31;

a second cylinder head gasket suction port 611 is arranged at a position of the second cylinder head gasket 61 corresponding to the second-stage suction inlet 322, a second cylinder head gasket exhaust port 612 is arranged at a position corresponding to the second exhaust cavity 43, and a second cylinder head gasket vent hole 613 is arranged at a position corresponding to the exhaust through hole 312; a second valve plate suction port 621 is formed in the second valve plate 62 at a position corresponding to the second head gasket suction port 611, a second valve plate exhaust port 622 is formed at a position corresponding to the second head gasket exhaust port 612, and a second valve plate vent hole 625 is formed at a position corresponding to the second head gasket vent hole 613; the second suction valve sheet 63 is provided with a second suction valve sheet suction 631 port, the second suction valve sheet suction 631 port is provided with a second reed elastic sheet 632 capable of opening and closing, a second suction valve sheet exhaust port 633 is arranged at the position of the second reed elastic sheet 632 corresponding to the second valve sheet exhaust port 622, and a second suction valve sheet vent 634 is arranged at the position corresponding to the second valve sheet vent 625; a second suction valve plate gasket through hole 641 is formed in the position, corresponding to the opening of the second compression cavity 311, of the second suction valve plate gasket 64, and a second suction valve plate gasket vent hole 642 is formed in the position, corresponding to the exhaust through hole 312; a third air flow channel is formed by the second cylinder cover gasket air suction port 611, the second valve plate air suction port 621, the second air suction valve sheet air suction 631 port and the second air suction valve sheet gasket through hole 641; a fourth airflow channel is formed by the second suction valve plate gasket through hole 641, the second suction valve plate exhaust port 633, the second valve plate exhaust port 622 and the second cylinder head gasket exhaust port 612; the second cylinder head gasket vent 613, the second valve plate vent 625, the second suction valve plate vent 634, and the second suction valve plate gasket vent 642 form a fifth air flow path.

As shown in the air flow direction with arrow lines in fig. 5, the refrigerant enters the first valve plate suction port 521 through the second cylinder head gasket suction port 611, the second reed valve block 632 opens the second suction valve block suction port 631 under the action of the pressure difference, and the refrigerant enters the second compression cavity 311 through the second suction valve block suction port 631 and the second suction valve block gasket through hole 641. The condition that the second reed valve plate can be opened is the same as the condition that the first reed valve plate can be opened, and the description is omitted here.

Further alternatively, as shown in fig. 8 and 9, the second valve plate 62 is provided with a second exhaust valve plate 623 for opening and closing the second valve plate exhaust port 622, and a second lift stopper 624 engaged with the second exhaust valve plate 623. As shown in the flow direction with an arrow line in fig. 5, after the refrigerant is compressed into high-temperature and high-pressure gas through the second compression cavity 311, the refrigerant passes through the second suction valve sheet gasket through hole 641 and the second suction valve sheet exhaust port 221 to open the second exhaust valve sheet, so as to open the second valve sheet exhaust port 622, and then the refrigerant enters the second exhaust cavity 43 from the second valve sheet exhaust port 622 and the second cylinder head gasket exhaust port 612, under the same condition as the opening condition of the first exhaust valve sheet, and further description thereof is omitted. The first lift limiter 524 is disposed behind the first exhaust valve plate 523 and is used for preventing the first exhaust valve plate 523 from deforming when the pressure applied to the first exhaust valve plate 523 is too large. The gas in the second exhaust chamber 43 sequentially enters the exhaust via 312 through the second cylinder head gasket vent 613, the second valve plate vent 625, the second suction valve plate vent 634 and the second suction valve plate gasket vent 642.

The second valve assembly is arranged to form independent air flow paths for low-pressure refrigerant and high-pressure refrigerant among the second cylinder block 31, the second suction muffler 32 and the integral cylinder head 4, thereby ensuring the compression performance and stable operation of the second compressor.

Further alternatively, as shown in fig. 1, an exhaust pipe is provided on the second cylinder block 31, and the exhaust pipe is communicated with the exhaust through hole 312 of the second cylinder block 31. Preferably, the exhaust pipe comprises an inner exhaust pipe 34 positioned in the shell 1 and a secondary exhaust pipe 35 positioned outside the shell 1; one end of the inner exhaust pipe 34 communicates with the exhaust through hole 312, and the other end communicates with the secondary exhaust pipe 35. The gas in the second compressor is discharged through the discharge through-hole 312, the inner discharge pipe 34, and the outer discharge pipe.

The embodiment also discloses a refrigerating system, which is suitable for the field of refrigerators and air conditioners, the refrigerating system is provided with the double-machine compressor, single-stage and double-stage free switching can be realized according to the working condition of the refrigerators or the air conditioners, the second compressor can be independently operated and controlled and can also be simultaneously operated with the first compressor, so that the independent control of freezing and refrigerating of the refrigerator system is realized, or the control of different refrigerating/heating effects of the air conditioners is realized.

Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A double-machine compressor is characterized by comprising

A first compressor and a second compressor disposed in opposition, wherein:

the first compressor comprises a first cylinder cover, the second compressor comprises a second cylinder cover, the first cylinder cover and the second cylinder cover are integrally formed into a whole cylinder cover (4), and an exhaust passage (41) is formed in the whole cylinder cover (4); the air inlet end of the exhaust channel (41) is communicated with the exhaust side of the first compressor, and the air outlet end of the exhaust channel is communicated with the air suction side of the second compressor; the discharge gas of the first compressor can directly enter the second compressor through the discharge passage (41);

when the first compressor and the second compressor run simultaneously, gas enters the second compressor through the exhaust passage for secondary compression after being subjected to primary compression in the first compressor;

the second compressor comprises a second cylinder block (31) and a second suction muffler (32); a second compression cavity (311) is arranged in the second cylinder seat (31), and the second compression cavity (311) is communicated with a first-stage exhaust inlet (321) of the second suction muffler (32); the outlet of the exhaust passage communicates with a secondary suction inlet (322) of the second suction muffler (32); an air supplementing port (323) is arranged on the second air suction silencer (32);

when the first compressor and the second compressor are operated simultaneously, exhaust gas from the first compressor enters the second suction muffler (32) from the exhaust passage (41), is mixed and muffled in the second suction muffler (32) with gas entering the second suction muffler (32) from the gas supplementing port (323), and the mixed and muffled gas enters the second compression chamber (311) for secondary compression; when the second compressor operates alone, the gas entering the second suction muffler (32) from the gas supplementing port (323) enters the second compression chamber (311) for compression after being subjected to silencing treatment in the second suction muffler (32).

2. The twin-compressor machine as claimed in claim 1, wherein the integral cylinder head (4) is formed with a second discharge chamber (43) on a side close to the second compressor, the second compressor is provided with a discharge through hole (312), and the second discharge chamber (43) is communicated with the discharge through hole (312);

when the second compressor operates alone or the first compressor and the second compressor operate simultaneously, the exhaust gas of the second compressor enters the second exhaust cavity (43) and then is exhausted out of the second compressor through the exhaust through hole (312).

3. -twin compressor according to claim 2, characterised in that the first compressor comprises a first cylinder seat (21) and a first suction muffler (22); a first compression chamber (211) is arranged in the first cylinder seat (21), and the first compression chamber (211) is communicated with an exhaust port (221) of the first suction muffler (22); the first air suction silencer (22) is connected with an air suction pipe; the inlet of the discharge passage (41) communicates with the first compression chamber (211);

when the first compressor and the second compressor run simultaneously, gas entering from the gas suction pipe enters the first compression cavity (211) for first-stage compression after being subjected to silencing treatment by the first gas suction silencer (22); and the gas after the first-stage compression enters the second compressor through the exhaust passage (41) to be subjected to second-stage compression.

4. A twin compressor as claimed in claim 3, characterised in that the one-piece cylinder head (4) is formed with a first discharge chamber (42) at the inlet of the discharge channel (41), the discharge of the first compression chamber (211) entering the discharge channel (41) through the first discharge chamber (42).

5. Double machine compressor according to claim 4, characterised in that the one-piece cylinder head (4) is formed with a first escape space (45) at the outlet of the exhaust channel (41);

the second air suction silencer (32) is provided with a gas guide part (324), an air inlet passage and an air outlet passage are arranged in the gas guide part (324), the primary air outlet inlet (321) is formed in one side, facing the air outlet channel (41), of the air inlet passage, and the secondary air suction inlet (322) is formed in one side, facing the second compression cavity (311), of the air outlet passage; the primary exhaust inlet (321) and the secondary suction inlet (322) are arranged oppositely and connected into a whole;

the primary exhaust inlet (321) and the secondary suction inlet (322) are both positioned in the first avoidance space (45), the primary exhaust inlet (321) faces to the outlet of the exhaust channel (41) and is communicated with the exhaust channel (41), and the secondary suction inlet (322) faces to the second compression cavity (311) and is communicated with the second compression cavity (311); the second exhaust chamber (43) is formed above the first escape space (45).

6. The twin compressor according to claim 5, wherein the integral cylinder head (4) is formed with a second escape space (44) below the first discharge chamber (42), the discharge port (221) is located in the second escape space (44), and the discharge port (221) faces the first compression chamber (211) and communicates with the first compression chamber (211).

7. -twin compressor according to any of claims 4 to 6, characterised in that between the first compressor and the monobloc cylinder head (4) there is a first valve assembly (5), the first valve assembly (5) being provided with a first air flow passage communicating the exhaust port (221) with the first compression chamber (211) and a second air flow passage communicating the first compression chamber (211) with the first exhaust chamber (42);

the gas discharged from the gas outlet (221) enters the first compression chamber (211) through the first gas flow path, is compressed, and then enters the first gas discharge chamber (42) through the second gas flow path.

8. The twin-compressor according to claim 7, characterized in that the first valve assembly (5) comprises a first cylinder head gasket (51), a first valve plate (52), a first suction valve plate (53) and a first suction valve plate gasket (54) arranged in sequence in the direction from the integral cylinder head (4) to the first cylinder block (21);

a first cylinder head gasket air suction port (511) is arranged at a position of the first cylinder head gasket (51) corresponding to the air exhaust port (221), and a first cylinder head gasket air exhaust port (512) is arranged at a position corresponding to the first exhaust cavity (42);

a first valve plate suction port (521) is arranged at a position of the first valve plate (52) corresponding to the first cylinder head gasket suction port (511), and a first valve plate exhaust port (522) is arranged at a position corresponding to the first cylinder head gasket exhaust port (512);

a first air suction valve plate suction port (531) is formed in the first air suction valve plate (53), a first reed elastic sheet (532) capable of opening and closing the first air suction valve plate suction port (531) is arranged on the first air suction valve plate suction port (531), and a first air suction valve plate exhaust port (533) is formed in the position, corresponding to the first valve plate exhaust port (522), of the first reed elastic sheet (532);

a first air suction valve plate gasket through hole (541) communicated with the first compression cavity (211) is formed in the first air suction valve plate gasket (54);

the first cylinder head gasket air suction port (511), the first valve plate air suction port (521), the first air suction valve plate air suction port (531) and the first air suction valve plate gasket through hole (541) form the first air flow passage; the first suction valve plate gasket through hole (541), the first suction valve plate exhaust port (533), the first valve plate exhaust port (522), and the first cylinder head gasket exhaust port (512) form the second airflow passage.

9. The twin-compressor as recited in claim 8, wherein the first valve plate (52) is provided with a first exhaust valve plate (523) for opening and closing the first valve plate exhaust port (522), and a first lift limiter (524) engaged with the first exhaust valve plate (523).

10. -twin compressor according to claim 7, characterised in that between the second compressor and the monobloc cylinder head (4) there is a second valve assembly; a third air flow passage for communicating the second-stage suction inlet (322) with the second compression chamber (311), a fourth air flow passage for communicating the second compression chamber (311) with the second discharge chamber (43), and a fifth air flow passage for communicating the second discharge chamber (43) with the discharge through hole (312) are provided on the second valve assembly;

and gas exhausted from the secondary suction inlet (322) enters the second compression cavity (311) through the third airflow channel for compression, then enters the second exhaust cavity (43) through the fourth airflow channel, and finally is exhausted from the second compressor through the exhaust through hole (312) through the fifth airflow channel from the second exhaust cavity (43).

11. The twin-compressor as defined in claim 10, wherein the second valve assembly comprises a second cylinder head gasket (61), a second valve plate (62), a second suction valve plate (63) and a second suction valve plate gasket (64) arranged in sequence along the direction from the integral cylinder head (4) to the second cylinder block (31);

a second cylinder head gasket suction port (611) is arranged at a position of the second cylinder head gasket (61) corresponding to the secondary suction inlet (322), a second cylinder head gasket exhaust port (612) is arranged at a position corresponding to the second exhaust cavity (43), and a second cylinder head gasket vent hole (613) is arranged at a position corresponding to the exhaust through hole (312);

a second valve plate suction port (621) is arranged at a position of the second valve plate (62) corresponding to the second cylinder head gasket suction port (611), a second valve plate exhaust port (622) is arranged at a position corresponding to the second cylinder head gasket exhaust port (612), and a second valve plate vent hole (625) is arranged at a position corresponding to the second cylinder head gasket vent hole (613);

a second suction valve sheet suction port (631) is formed in the second suction valve sheet (63), a second reed elastic sheet (632) capable of opening and closing is formed in the second suction valve sheet suction port (631), a second suction valve sheet exhaust port (633) is formed in the position, corresponding to the second valve sheet exhaust port (622), of the second reed elastic sheet (632), and a second suction valve sheet vent hole (634) is formed in the position, corresponding to the second valve sheet vent hole (625);

a second suction valve plate gasket through hole (641) is formed in the position, corresponding to the opening of the second compression cavity (311), of the second suction valve plate gasket (64), and a second suction valve plate gasket vent hole (642) is formed in the position, corresponding to the exhaust through hole (312);

the second cylinder head gasket suction port (611), the second valve plate suction port (621), the second suction valve plate suction port (631) and the second suction valve plate gasket through hole (641) form the third air flow channel; the second suction valve piece gasket through hole (641), the second suction valve piece exhaust port (633), the second valve piece exhaust port (622) and the second cylinder head gasket exhaust port (612) form the fourth airflow channel; the second cylinder head gasket vent hole (613), the second valve plate vent hole (625), the second suction valve plate vent hole (634), and the second suction valve plate gasket vent hole (642) form the fifth air flow path.

12. The twin-compressor as recited in claim 11, wherein the second valve plate (62) is provided with a second discharge valve plate (623) for opening and closing the second valve plate discharge port (622), and a second lift stopper (624) engaged with the second discharge valve plate (623).

13. The twin-compressor as defined in claim 6, wherein the second cylinder block (31) is provided with an exhaust pipe, and the exhaust pipe is communicated with the exhaust through hole (312).

14. A refrigeration system comprising the twin compressor of any one of claims 1-13.