CN111810378A - A dual-machine compressor and refrigeration system - Google Patents

Abstract

The invention belongs to the field of compressors, and particularly discloses a dual-machine compressor, comprising a first compressor and a second compressor arranged opposite to each other, wherein: the first compressor includes a first cylinder head, and the second compressor includes a second compressor. Two cylinder heads, the first cylinder head and the second cylinder head are integrated to form an integral cylinder head, and an exhaust passage is formed in the integral cylinder head; the intake end of the exhaust passage is communicated with the exhaust side of the first compressor, and the exhaust end It is communicated with the 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 at the same time, the gas is compressed in the first compressor. The compressor enters the second compressor through the exhaust passage after the first-stage compression for the second-stage compression. The dual-machine compressor of the present invention can realize the free switching structure of single and dual stages according to working conditions, the arrangement direction of the dual-machine is an opposite structure, the cylinder head components of the dual-machine are integrally connected, and the structure is compact.

Description

A dual-machine compressor and refrigeration system

technical field

The invention belongs to the field of compressors, and in particular relates to a dual-machine compressor and a refrigeration system.

Background technique

At present, with the improvement of living standards and quality, more and more refrigerator systems have put forward application requirements such as independent temperature control, deep freezing below -33 °C, and high energy efficiency. For the independent temperature control of the refrigeration system, it can be realized by the independent temperature control of the multi-evaporation temperature system, that is, the refrigeration system needs to have multiple evaporation pressures, and the compressor also needs to have the corresponding multi-stage compression function. However, at present, there are no two-stage compression related products in the field of domestic piston compressors in the industry.

In view of this, the present invention is proposed.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to propose a compressor structure with dual-machine, double-cylinder, and two-stage compression. The single-stage and double-stage can be freely switched according to the working conditions. connection, compact structure.

In order to solve the above technical problems, the present invention discloses a dual-machine compressor, comprising:

Opposite arrangement of a first compressor and a second compressor, wherein:

The first compressor includes a first cylinder head, the second compressor includes a second cylinder head, the first cylinder head and the second cylinder head are integrated to form an integral cylinder head, and the integral cylinder head is inside the cylinder head. An exhaust passage is formed; the inlet end of the exhaust passage is communicated with the exhaust side of the first compressor, and the outlet end is communicated with the suction side of the second compressor; The exhaust gas can directly enter the second compressor through the exhaust passage;

When the first compressor and the second compressor operate at the same time, the gas enters the second compressor through the exhaust passage after the first compressor performs primary compression for secondary compression.

Further optionally, the integral cylinder head is formed with a second exhaust cavity on a side close to the second compressor, the second compressor is provided with an exhaust through hole, and the second exhaust cavity is connected to the second compressor. the exhaust through holes are connected;

When the second compressor operates alone, or the first compressor and the second compressor operate at the same time, the exhaust gas of the second compressor enters the second exhaust chamber and is passed through by the exhaust gas The orifice discharges the secondary compressor.

Further optionally, the first compressor includes a first cylinder block and a first suction muffler; the first cylinder block is provided with a first compression cavity, and the first compression cavity is connected to the first suction muffler. The exhaust port of the air muffler is communicated; the first suction muffler is connected with a suction pipe; the inlet of the exhaust passage is communicated with the first compression chamber;

When the first compressor and the second compressor are running at the same time, the gas entering from the first suction pipe is silenced by the first suction muffler, and then enters the first compression chamber for One-stage compression; the gas after the first-stage compression enters the second compressor through the exhaust passage for two-stage compression.

Further optionally, the second compressor includes a second cylinder seat and a second suction muffler; the second cylinder seat is provided with a second compression chamber, and the second compression chamber is connected to the second suction muffler. The primary exhaust inlet of the air muffler is connected; the outlet of the exhaust passage is communicated with the secondary air inlet of the second suction muffler; the second suction muffler is provided with an air supply port;

When the first compressor and the second compressor operate at the same time, the exhaust gas from the first compressor enters the second suction muffler from the exhaust passage, and the exhaust gas from the air supply port enters the second suction muffler. The gas entering the second suction muffler is subjected to mixed noise reduction treatment in the second suction muffler, and the gas after the mixed noise reduction treatment enters the second compression chamber for secondary compression; the second compression When the machine is running alone, the gas entering the second suction muffler from the air supply port is subjected to silencing treatment in the second suction muffler and then enters the second compression chamber for compression.

Further optionally, the integral cylinder head is formed with a first exhaust cavity at the inlet of the exhaust passage, and the exhaust gas of the first compression cavity enters the exhaust passage through the first exhaust cavity .

Further optionally, the integral cylinder head is formed with a first avoidance space at the outlet of the exhaust passage;

The second suction muffler is provided with a gas guide portion, and an air inlet passage and an air outlet passage are arranged in the gas guide portion, and the first-stage exhaust gas is opened on the side of the air inlet passage facing the exhaust passage. an inlet, the side of the air outlet passage facing the second compression chamber is provided with the secondary suction inlet; the primary exhaust inlet and the secondary suction inlet are arranged facing away and connected integrally;

Both the primary exhaust inlet and the secondary suction inlet are located in the first avoidance space, and the primary exhaust inlet faces the outlet of the exhaust passage and communicates with the exhaust passage , the secondary suction inlet faces the second compression chamber and communicates with the second compression chamber; the second exhaust chamber is formed above the first avoidance space.

Further optionally, the integral cylinder head is formed with a second avoidance space below the first exhaust cavity, the exhaust port is located in the second avoidance space, and the exhaust port faces the The first compression chamber is in communication with the first compression chamber.

Further optionally, a first valve assembly is disposed between the first compressor and the integral cylinder head, and a first valve assembly is disposed on the first valve assembly to communicate the exhaust port with the first compression chamber. a first airflow passage, and a second airflow passage connecting the first compression chamber and the first exhaust chamber;

The gas discharged from the exhaust port enters the first compression chamber through the first airflow passage, and then enters the first exhaust chamber through the second airflow passage for compression.

Further optionally, the first valve assembly includes a first cylinder head gasket, a first valve plate, a first intake valve plate and a first cylinder head gasket, a first valve plate, a first intake valve plate and a first cylinder head gasket arranged in sequence along the direction from the integral cylinder head to the first cylinder seat. Suction valve gasket;

The first cylinder head gasket is provided at the position corresponding to the exhaust port with a first cylinder head gasket suction port, and the position corresponding to the first exhaust cavity is provided with a first cylinder head gasket exhaust vent;

The position of the first valve plate corresponding to the intake port of the first cylinder head gasket is provided with a first valve plate intake port, and the position corresponding to the exhaust port of the first cylinder head gasket is provided with a first valve plate intake port. The first valve plate exhaust port;

The first suction valve sheet is provided with a first suction valve sheet suction port, and the first suction valve sheet suction port is provided with a first suction port that can open and close the first suction valve sheet suction port. a reed spring piece, the position of the first reed spring piece corresponding to the exhaust port of the first valve plate is provided with a first suction valve piece exhaust port;

The first suction valve sheet gasket is provided with a first suction valve sheet gasket through hole that communicates with the first compression chamber;

The first cylinder head gasket intake port, the first valve plate intake port, the first intake valve plate intake port and the first intake valve plate gasket through hole form the first intake valve plate. an air flow passage; the through hole of the first intake valve sheet gasket, the exhaust port of the first intake valve sheet, the exhaust port of the first valve plate and the exhaust port of the first cylinder head gasket The second airflow passage is formed.

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

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 connection between the secondary suction inlet and the second compression chamber. a third airflow passage that communicates, a fourth airflow passage that connects the second compression chamber to the second exhaust chamber, and a fifth airflow that connects the second exhaust chamber to the exhaust through hole path;

The gas exhausted from the secondary suction inlet enters the second compression chamber through the third airflow passage for compression, and then enters the second exhaust chamber through the fourth airflow passage, and finally enters the second exhaust chamber through the second airflow passage. The discharge chamber is discharged from the second compressor from the discharge through hole through the fifth air flow passage.

Further optionally, the second valve assembly includes a second cylinder head gasket, a second valve plate, a second intake valve plate, and a second cylinder head gasket, a second valve plate, a second intake valve plate, and a second cylinder head gasket arranged in sequence along the direction from the integral cylinder head to the second cylinder seat. Suction valve gasket;

The second cylinder head gasket is provided with a second cylinder head gasket at the position corresponding to the secondary suction inlet, and the position corresponding to the second exhaust cavity is provided with a second cylinder head a gasket exhaust port, a second cylinder head gasket vent hole is provided at a position corresponding to the exhaust through hole;

The position of the second valve plate corresponding to the intake port of the second cylinder head gasket is provided with a second valve plate intake port, and the position corresponding to the exhaust port of the second cylinder head gasket is provided with a second valve plate intake port. The second valve plate exhaust port is provided with a second valve plate vent hole at a position corresponding to the second cylinder head gasket vent hole;

The second suction valve sheet is provided with a second suction valve sheet suction port, and the second suction valve sheet suction port is provided with a second reed elastic sheet that can be opened and closed. The position corresponding to the exhaust port of the second valve plate is provided with the exhaust port of the second suction valve sheet, and the position corresponding to the ventilation hole of the second valve plate is provided with the ventilation hole of the second suction valve sheet;

The position of the second suction valve sheet gasket corresponding to the opening of the second compression chamber is provided with a second suction valve sheet gasket through hole, and the position corresponding to the exhaust through hole is provided with a second suction valve sheet gasket. Two suction valve plate gasket vent hole;

The second cylinder head gasket intake port, the second valve plate intake port, the second intake valve sheet intake port and the second intake valve sheet gasket through hole form the first Three airflow passages; the second intake valve sheet gasket through hole, the second intake valve sheet exhaust port, the second valve plate exhaust port and the second cylinder head gasket exhaust port The fourth air flow passage is formed; the vent hole of the second cylinder head gasket, the vent hole of the second valve plate, the vent hole of the second intake valve sheet and the gasket of the second intake valve sheet are communicated with each other. The air hole forms the fifth air flow passage.

Further optionally, the second valve plate is provided with a second exhaust valve plate for opening and closing the exhaust port of the second valve plate, and a second lift limit matched with the second exhaust valve plate. positioner.

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

The present invention also proposes a refrigeration system, which includes the above-mentioned dual-machine compressor.

After adopting the above-mentioned technical scheme, the present invention has the following beneficial effects compared with the prior art:

1. The dual-machine compressor of the present invention proposes a compressor structure with dual-machine, dual-cylinder, and two-stage compression. The single-stage and double-stage can be freely switched according to the working conditions. Integrated connection, compact structure.

2. The structure of the integral cylinder head 4 in the dual-machine compressor of the present invention simplifies the process of the primary and secondary air paths, and the exhaust gas of the primary stage directly enters the secondary suction muffler through the structure of the integral cylinder head 4, and the structure is simple and easy At the same time, it plays a role in reducing compressor parts and reducing costs.

3. The structure of the second suction muffler 32 in the dual-machine compressor of the present invention is newly designed. When the first and second stages operate at the same time, the exhaust gas of the first stage directly enters the suction muffler of the second stage for air flow buffer expansion. The effect of reducing noise, while the muffler still works properly when the second stage operates independently.

The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

Description of drawings

The accompanying drawings, as a part of the present invention, are used to provide further understanding of the present invention, and the exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation of the present invention. Obviously, the drawings in the following description are only some embodiments, and for those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort. In the attached image:

Fig. 1: is the structure diagram of the dual-machine compressor of the embodiment of the present invention;

Fig. 2: is the sectional view of the dual-machine compressor of the embodiment of the present invention;

3 and 4 are sectional views of an integral cylinder head of a dual-engine compressor according to an embodiment of the present invention;

Fig. 5: is the exploded view of the double compressor of the embodiment of the present invention;

6 and 7 are structural diagrams of the second suction muffler of the dual-machine compressor according to the embodiment of the present invention;

FIG. 8 is an exploded view of the first valve assembly and the second valve assembly of the dual-machine compressor according to the embodiment of the present invention;

FIG. 9 is an exploded view of the first valve plate and the second valve plate of the dual-machine compressor according to the embodiment of the present invention.

FIG. 10 is a structural diagram of the second compressor of the dual-machine compressor according to the embodiment of the present invention.

in:

1. Housing; 21. The first cylinder seat; 22. The first suction muffler; 23. The first-level intake pipe; 211. The first compression chamber; 221. The exhaust port; 31. The second cylinder seat; 32. The second suction muffler; 33, the supplementary gas pipe; 34, the inner exhaust pipe; 35, the secondary exhaust pipe; 311, the second compression chamber; 312, the exhaust through hole; 321, the primary exhaust inlet; 322, Secondary suction inlet; 323, air supply port; 324, gas guide; 4, integral cylinder head; 41, exhaust passage; 42, first exhaust chamber; 43, second exhaust chamber; 44, second avoidance space; 45, the first avoidance space; 5, the first valve assembly; 51, the first cylinder head gasket; 52, the first valve plate; 53, the first suction valve plate; 54, the first suction valve plate gasket sheet; 511, the first cylinder head gasket intake port; 512, the first cylinder head gasket exhaust port; 521, the first valve plate intake port; 522, the first valve plate exhaust port; 523, the first Exhaust valve piece; 524, first lift limiter; 531, first suction valve piece suction; 532, first reed spring piece; 533, first suction valve piece exhaust port; 541, first Gasket through hole of suction valve sheet; 6. Second valve assembly; 61, Second cylinder head gasket; 62, Second valve plate; 63, Second suction valve sheet; 64, Second suction valve sheet gasket sheet; 611, the second cylinder head gasket intake port; 612, the second cylinder head gasket exhaust port; 613, the second cylinder head gasket vent hole; 621, the second valve plate intake port; 622, the first Two valve plate exhaust port; 623, second exhaust valve plate; 624, second lift limiter; 625, second valve plate vent hole; 631, second suction valve plate suction; 632, second Reed spring; 633, exhaust port of the second suction valve sheet; 634, ventilation hole of the second suction valve sheet; 641, through hole of the second suction valve sheet gasket; 642, second suction valve sheet gasket Air vent.

It should be noted that these drawings and written descriptions are not intended to limit the scope of the present invention in any way, but to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments.

Detailed ways

In order to make the purposes, 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 to illustrate the present invention , but are not intended to limit the scope of the present invention.

In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "inside", "outside", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, It is not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the invention.

In the description of the present invention, it should be noted that, unless otherwise expressly specified and limited, the terms "installed", "connected", "connected", "contacted" and "connected" should be understood in a broad sense, for example, it may be The fixed connection can also be a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

This embodiment discloses a dual-machine compressor, as shown in Figures 1, 2, and 5, which specifically includes a casing 1, and a first compressor and a second compressor are arranged in the casing 1 opposite to each other. The discharge side of the compressor is communicated with the suction side of the second compressor, so that the discharge of the first compressor can directly enter the second compressor; when the first compressor and the second compressor are running at the same time, the gas is After the first compressor performs first-stage compression, it enters the second compressor for second-stage compression. Specifically, the first compressor includes a first cylinder head, the second compressor includes a second cylinder head, the first cylinder head and the second cylinder head integrally form an integral cylinder head 4, and an exhaust passage is formed in the integral cylinder head 4 41; the intake end of the exhaust passage 41 is communicated with the exhaust side of the first compressor, and the outlet end is communicated with the suction side of the second compressor; the exhaust gas of the first compressor can directly enter the first compressor through the exhaust passage 41. In the second compressor; when the first compressor and the second compressor operate at the same time, the gas enters the second compressor through the exhaust passage 41 after the first compressor is compressed in the first stage for the second stage compression.

In this embodiment, the first compressor and the second compressor are connected through the integral cylinder head 4; the whole compressor can realize free switching between single and double stages according to the working conditions, and the second compressor can be operated and controlled independently, and can also be combined with the first compressor. The compressors are operated and controlled at the same time, so that they can be adapted to different working conditions of the refrigeration system.

Further optionally, the integral cylinder head 4 is formed with a second exhaust cavity 43 on the side close to the second compressor, the second compressor is provided with an exhaust through hole 312, the second exhaust cavity 43 and the exhaust through hole are formed. 312 is connected; when the second compressor operates alone, or when the first compressor and the second compressor operate at the same time, the exhaust gas of the second compressor enters the second exhaust chamber 43 and is discharged to the second stage through the exhaust through hole 312 compressor. 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 from the second-stage compressor through the exhaust through hole 312 .

Further optionally, the first compressor includes a first cylinder block 21 and a first suction muffler 22; the first cylinder block 21 is provided with a first compression chamber 211, the first compression chamber 211 and the first suction muffler The exhaust port 221 of 22 is connected; the first suction muffler 22 is connected with a suction pipe; the second compressor includes a second cylinder base 31 and a second suction muffler 32; Two compression chambers 311, the second compression chamber 311 communicates with the primary exhaust inlet 321 of the second suction muffler 32;

The shell 1 is also provided with a supplementary gas pipe 33, and the supplemental gas entering from the gas supplementation pipe 33 directly enters the cavity of the shell 1, and the gas supplementation port 323 on the second suction muffler 32, when the second compressor inhales , the supplemental gas is sucked into the second muffler 32 from the housing 1 and the supplemental gas pipe 33 through the supplemental gas port 323 for mixing.

The inlet of the exhaust passage 41 is communicated with the first compression chamber 211, and the outlet is communicated with the secondary suction inlet 322 of the second suction muffler 32; When running with the second compressor at the same time, the gas entering from the first suction pipe is silenced by the first suction muffler 22, and then enters the first compression chamber 211 for first-stage compression; The exhaust passage 41 enters the second suction muffler 32, and the gas entering the second suction muffler 32 from the air supply port 323 is subjected to mixed noise reduction treatment in the second suction muffler 32, and the gas after the mixed noise reduction treatment enters The second compression chamber 311 performs two-stage compression.

The first compressor and the second compressor in this embodiment are connected through the integral cylinder head 4; when the first compressor and the second compressor operate at the same time, the first compressor enters through the direct suction from the first suction pipe In the first suction muffler 22, the suction of the second compressor enters the second suction muffler 32 through the air supply port 323 on the one hand, and the exhaust from the first-stage muffler passes through the integral cylinder head 4 on the other hand. The exhaust passage 41 enters the second suction muffler 32 for mixed suction; when the second compressor operates independently, the suction of the second compressor enters the second suction muffler 32 from the supplementary air port 323, and the second compressor To achieve independent operation, the entire compressor can realize free switching between single and double stages according to the working conditions, and the second compressor can operate and control independently.

Further optionally, the first compressor and the second compressor are symmetrically arranged on both sides of the integral cylinder head 4, and the exhaust passage 41 extends from the side close to the first compression chamber 211 to the direction close to the first-stage exhaust inlet 321. .

In this embodiment, by arranging the first compressor and the second compressor oppositely on both sides of the integral cylinder head 4, the arrangement space of the second compressor can be optimized, which is beneficial to the space utilization and layout of the casing 1, while the first and second compressors The connection is opposed to the layout, the stability of the whole machine core can effectively reduce the vibration of the compressor, and it has the effect of reducing the noise and vibration of the compressor.

Further optionally, as shown in FIG. 2 , FIG. 3 , FIG. 4 , and FIG. 5 , the integral cylinder head 4 is formed with a first exhaust chamber 42 at the inlet of the exhaust passage 41 , and the exhaust gas of the first compression chamber 211 is The first exhaust cavity 42 enters the exhaust passage 41 . Through the connection of the first compressor with the integral cylinder head 4, the exhaust gas from the first compression chamber 211 can directly enter the secondary suction muffler through the first exhaust chamber 42 and the exhaust passage 41 on the integral cylinder head 4 In this way, the second suction muffler 32 is used as both the first-stage exhaust muffler cavity and the second suction muffler 32, so that the structure of the exhaust muffler cavity can be reduced, which is beneficial to the lightweight design of the compressor and the reduction of material costs. The expansion and mixing of the second suction muffler 32 can effectively reduce the pressure pulsation of the first-stage exhaust and reduce the exhaust noise of the first compressor.

The integral cylinder head 4 has a first avoidance space 45 formed at the outlet of the exhaust passage 41; as shown in FIG. 6 and FIG. The air inlet passage and the air outlet passage, the air inlet passage is provided with a primary exhaust inlet 321 on the side facing the exhaust passage 41, and the secondary suction inlet 322 is provided on the side of the outlet passage facing the second compression chamber 311; the primary exhaust inlet 321 and the secondary suction inlet 322 are arranged opposite to each other and connected as a whole; the primary exhaust inlet 321 and the secondary suction inlet 322 are both located in the first avoidance space 45, and the second exhaust cavity 43 is formed in the first avoidance space 43. Above space 45.

The arrangement of the first avoidance space 45 makes the connection between the integral cylinder head 4 and the second suction muffler 32 and the second cylinder head 4 more compact, saves the internal space of the casing 1 and facilitates the space utilization and layout of the casing 1 .

The primary exhaust inlet 321 faces the outlet of the exhaust passage 41 and communicates with the exhaust 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 is running at the same time, 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, and is at the same time as the intermediate gas entering from the supplemental gas inlet. Mixing and silencing is carried out in the muffler, and then it is sucked into the second compression chamber 311 through the secondary suction inlet 322 for compression; when the compressor does not operate according to the working conditions of the electrical appliance, and the second compressor operates independently, a The stage exhaust inlet 321 is connected to the first exhaust cavity 42 of the overall cylinder head 4 , and the first exhaust cavity 42 can be used as an expansion volume cavity of the second suction muffler 32 to increase the muffler volume of the second suction muffler 32 , which is beneficial to the reduction of the suction noise of the second compressor, thereby reducing the noise of the whole machine.

The integral cylinder head 4 forms a first avoidance space 44 below the first exhaust chamber 42 , the exhaust port 221 is located in the first avoidance space 44 , and the exhaust port 221 faces the first compression chamber 211 and is connected with the first compression chamber. 211 is connected. The arrangement of the first avoidance space 44 makes the connection between the integral cylinder head 4 and the first suction muffler 22 and the first cylinder head 4 more compact, saves the internal space of the casing 1 and facilitates the space utilization and layout of the casing 1 .

As shown in FIG. 2, FIG. 3, FIG. 4, and FIG. 5, the integral cylinder head 4 is formed with a second exhaust chamber 43 above the first avoidance space 44, and the second compressor is provided with an exhaust through hole 312, as shown in FIG. As shown in 10, the second exhaust chamber 43 communicates with the exhaust through hole 312 and the second compression chamber 311 respectively.

Further optionally, as shown in FIG. 2 and FIG. 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 connection between the exhaust port 221 and the first compression valve. The first airflow path that communicates with the cavity 211, and the second airflow path that connects the first compression cavity 211 to the first exhaust cavity 42; the gas discharged from the exhaust port 221 enters the first compression cavity 211 through the first airflow path After being compressed, it enters the first exhaust chamber 42 through the second airflow passage.

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

The position of the first cylinder head gasket 51 corresponding to the exhaust port 221 is provided with a first cylinder head gasket intake port 511 , and the position corresponding to the first exhaust chamber 42 is provided with a first cylinder head gasket exhaust port Port 512; the position of the first valve plate 52 corresponding to the intake port 511 of the first cylinder head gasket is provided with a first valve plate intake port 521, and the position corresponding to the exhaust port 512 of the first cylinder head gasket is provided There is a first valve plate exhaust port 522; the first suction valve sheet 53 is provided with a first suction valve sheet suction 531, and the first suction valve sheet suction port 531 is provided with a first suction valve that can be opened and closed The first reed spring piece 532 of the valve sheet suction port 531 is provided with a first suction valve sheet exhaust port 533 at the position corresponding to the first tongue spring sheet 532 and the first valve plate exhaust port 522; The valve plate gasket 54 is provided with a first intake valve plate gasket through hole 541 that communicates with the first compression chamber 211; the first cylinder head gasket intake port 511, the first valve plate intake port 521, the A suction valve sheet suction port 531 and a first suction valve sheet gasket through hole 541 form a first airflow passage; the first suction valve sheet gasket through hole 541, the first suction valve sheet exhaust port 533, The first valve plate exhaust port 522 and the first cylinder head gasket exhaust port 512 form a second airflow passage.

As shown in the direction of the airflow with the arrow line in Figure 5, the refrigerant enters the first valve plate suction port 521 through the first cylinder head gasket suction port 511, and under the action of the pressure difference, the first reed valve piece opens the first suction The valve sheet suction port 531, the refrigerant enters the first compression chamber 211 through the first suction valve sheet suction port 531 and the first suction valve sheet gasket through hole 541. The conditions for the first reed valve to be opened are: set the suction port area S1 of the first suction valve, the suction pressure P0, the pressure P1 in the first compression chamber, and the sealing force of the first reed valve. F1; Inhalation process: when P1*S1+F1<P0*S1, the first reed valve can be opened; when P1*S1+F1≥P0*S1, the first reed valve is closed; other processes ( Compression and exhaust process) the first reed valve plate is closed.

As shown in FIG. 8 and FIG. 9 , the first valve plate 52 is provided with a first exhaust valve plate 523 for opening and closing the exhaust port 522 of the first valve plate, and a first lift valve plate 523 matched with the first exhaust valve plate 523 . travel limiter 524. As shown in the direction of the airflow with the arrow line in Figure 5, the refrigerant is compressed into high temperature and high pressure gas through the first compression chamber 211, and then pushed open through the first suction valve gasket through hole 541 and the first-stage suction valve exhaust port 221. The first exhaust valve plate opens the first valve plate exhaust port 522, and then enters the first exhaust chamber 42 from the first valve plate exhaust port 522 and the first cylinder head gasket exhaust port 512; The conditions for the air valve plate to be pushed open are: set the exhaust port area S2 of the first valve plate, the exhaust pressure P2, the pressure P3 in the first compression chamber, and the sealing force F2 of the exhaust valve plate; the exhaust process: When P3*S2>F+P2*S2, the first exhaust valve is opened to exhaust; when P3*S2≤F+P2*S2, the first exhaust valve is closed; other processes (inhalation process and compression process) the first exhaust valve sheets are all closed.

The first lift limiter 524 is disposed behind the first exhaust valve plate 523 to prevent the first exhaust valve plate 523 from being deformed when the pressure on the first exhaust valve plate 523 is too large.

The arrangement of the first valve assembly 5 can form independent airflow paths for low-pressure refrigerant and high-pressure refrigerant between the first cylinder seat 21, the first suction muffler 22 and the integral cylinder head 4, so as to ensure the compression performance of the first compressor and the Stable operation. In addition, the first exhaust chamber 42 is not directly connected to the first compression chamber 211, and needs to be isolated and sealed through the first valve assembly 5. Only the compressor exhaust process is directly connected, and the first valve during the compressor suction process and the compression process is directly connected. The assembly 5 needs to isolate and seal the first exhaust chamber 42 and the first compression chamber 211 .

Further optionally, as shown in FIG. 2 and FIG. 5 , a second valve assembly is provided between the second compressor and the integral cylinder head 4; a third airflow passage connecting the cavity 311, a fourth airflow passage connecting the second compression cavity 311 with the second exhaust cavity 43, and a fifth airflow passage connecting the second exhaust cavity 43 with the exhaust through hole 312; The gas discharged from the secondary suction inlet 322 enters the second compression chamber 311 through the third airflow passage for compression, then enters the second exhaust chamber 43 through the fourth airflow passage, and finally passes through the fifth airflow passage from the second exhaust chamber 43 The second compressor is discharged from the discharge through hole 312 .

Specifically, as shown in FIG. 8 , the second valve assembly includes a second cylinder head gasket 61 , a second valve plate 62 , and a second intake valve plate 63 arranged in sequence along the direction from the integral cylinder head 4 to the second cylinder seat 31 . and the second suction valve plate gasket 64;

The position of the second cylinder head gasket 61 corresponding to the secondary suction inlet 322 is provided with a second cylinder head gasket suction port 611 , and the position corresponding to the second exhaust chamber 43 is provided with a second cylinder head gasket The exhaust port 612 is provided with a second cylinder head gasket ventilation hole 613 at the position corresponding to the exhaust through hole 312; The second valve plate air inlet 621 is provided at the position corresponding to the second cylinder head gasket exhaust port 612, and the second valve plate exhaust port 622 is provided at the position corresponding to the second cylinder head gasket vent hole 613. The second valve plate ventilation hole 625; the second suction valve sheet 63 is provided with a second suction valve sheet suction port 631, and the second suction valve sheet suction port 631 is provided with a second reed spring that can be opened and closed 632, the position of the second reed spring piece 632 corresponding to the exhaust port 622 of the second valve plate is provided with a second suction valve sheet exhaust port 633, and the position corresponding to the vent hole 625 of the second valve plate is provided with a second valve plate exhaust port 633. Suction valve sheet ventilation hole 634; the second suction valve sheet gasket 64 is provided with a second suction valve sheet gasket through hole 641 at the position corresponding to the opening of the second compression chamber 311, which is in line with the exhaust through hole 312 The corresponding position is provided with the second suction valve sheet gasket vent hole 642; the second cylinder head gasket suction port 611, the second valve plate suction port 621, the second suction valve sheet suction port 631 and the second The through hole 641 of the suction valve plate gasket forms the third air flow passage; 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 The cover gasket exhaust port 612 forms a fourth airflow passage; the second cylinder head gasket vent hole 613, the second valve plate vent hole 625, the second intake valve sheet vent hole 634 and the second intake valve sheet gasket communicate with each other. The air holes 642 form a fifth air flow passage.

As shown in the direction of the airflow with the arrow line in Figure 5, the refrigerant enters the first valve plate suction port 521 through the second cylinder head gasket suction port 611, and under the action of the pressure difference, the second reed valve piece 632 opens the second suction port 632. The air valve piece has a suction port 631, and the refrigerant enters the second compression chamber 311 through the suction port 631 of the second suction valve piece and the second suction valve piece gasket through hole 641. The conditions under which the second reed valve piece can be opened are the same as the opening conditions for the first reed valve piece, which will not be repeated here.

Further optionally, as shown in FIG. 8 and FIG. 9 , the second valve plate 62 is provided with a second exhaust valve plate 623 for opening and closing the exhaust port 622 of the second valve plate, and a second exhaust valve plate 623 is provided on the second valve plate 62 . The mating second lift limiter 624 . As shown in the direction of the airflow with the arrow line in Figure 5, the refrigerant is compressed into high temperature and high pressure gas through the second compression chamber 311, and then pushed open through the second suction valve plate gasket through hole 641 and the second suction valve plate exhaust port 221 The second exhaust valve plate opens the exhaust port 622 of the second valve plate, and then the second exhaust gas enters the second exhaust chamber 43 from the exhaust port 622 of the second valve plate and the exhaust port 612 of the second cylinder head gasket The conditions under which the valve plate can be opened are the same as the opening conditions of the first exhaust valve plate, which will not be repeated here. The first lift limiter 524 is disposed behind the first exhaust valve plate 523 to prevent the first exhaust valve plate 523 from being deformed when the pressure on the first exhaust valve plate 523 is too large. The gas in the second exhaust chamber 43 sequentially passes through the second cylinder head gasket vent hole 613 , the second valve plate vent hole 625 , the second intake valve plate vent hole 634 and the second intake valve plate gasket vent hole 642 into the exhaust through hole 312 .

The arrangement of the second valve assembly can form independent airflow paths for low-pressure refrigerant and high-pressure refrigerant between the second cylinder seat 31 , the second suction muffler 32 and the integral cylinder head 4 to ensure the compression performance and stable operation of the second compressor .

Further optionally, as shown in FIG. 1 , an exhaust pipe is provided on the second cylinder base 31 , and the exhaust pipe communicates with the exhaust through hole 312 of the second cylinder base 31 . Preferably, the exhaust pipe includes an inner exhaust pipe 34 located in the casing 1 and a secondary exhaust pipe 35 located outside the casing 1; one end of the inner exhaust pipe 34 is communicated with the exhaust through hole 312, and the other end is connected to the secondary exhaust pipe 312. The exhaust pipe 35 communicates with each other. The gas in the second compressor is discharged through the exhaust through hole 312 , the inner exhaust pipe 34 and the outer exhaust pipe.

This embodiment also discloses a refrigeration system, which is suitable for the fields of refrigerators and air conditioners. The refrigeration system has the above-mentioned dual-machine compressor, and can realize free switching between single and dual stages according to the working conditions of the refrigerator or air conditioner. The second compressor can be It can operate and control independently, and can also run simultaneously with the first compressor, so as to realize the independent control of freezing and refrigerating of the refrigerator system, or realize the control of different cooling/heating effects of the air conditioner.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention in any form. Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Within the scope of the technical solution of the present invention, personnel can make some changes or modifications to equivalent examples of equivalent changes by using the above-mentioned technical content, but any content that does not depart from the technical solution of the present invention is based on the technical solution of the present invention. Substantially any simple modifications, equivalent changes and modifications made to the above embodiments still fall within the scope of the solutions of the present invention.

Claims (15)

1. a double compressor, is characterized in that, comprises Opposite arrangement of a first compressor and a second compressor, wherein: The first compressor includes a first cylinder head, the second compressor includes a second cylinder head, and the first cylinder head and the second cylinder head are integrated to form an integral cylinder head (4). An exhaust passage (41) is formed in the cylinder head (4); the intake end of the exhaust passage (41) is communicated with the exhaust side of the first compressor, and the outlet end is connected with the exhaust side of the second compressor. The suction side is communicated; the exhaust gas of the first compressor can directly enter the second compressor through the exhaust passage (41); When the first compressor and the second compressor operate at the same time, the gas enters the second compressor through the exhaust passage after the first compressor performs primary compression for secondary compression. 2. A dual-engine compressor according to claim 1, characterized in that, a second exhaust chamber (43) is formed on a side of the integral cylinder head (4) 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 by the A discharge through hole (312) discharges the secondary compressor. 3. A dual-engine compressor according to claim 2, wherein the first compressor comprises a first cylinder block (21) and a first suction muffler (22); the first cylinder A first compression chamber (211) is arranged in the seat (21), and the first compression chamber (211) communicates with the exhaust port (221) of the first suction muffler (22); the first suction The air muffler (22) is connected with a suction pipe; the inlet of the exhaust passage (41) is communicated with the first compression chamber (211); When the first compressor and the second compressor operate at the same time, the gas entering from the first suction pipe enters the first suction muffler (22) after being silenced by the first suction muffler (22). The compression chamber (211) performs primary compression; the gas after primary compression enters the second compressor through the exhaust passage (41) for secondary compression. 4. A dual-engine compressor according to claim 3, wherein the second compressor comprises a second cylinder block (31) and a second suction muffler (32); the second cylinder A second compression chamber (311) is arranged in the seat (31), and the second compression chamber (311) communicates with the primary exhaust inlet (321) of the second suction muffler (32); The outlet of the air passage is communicated with the secondary suction inlet (322) of the second suction muffler (32); the second suction muffler (32) is provided with an air supply port (323); When the first compressor and the second compressor operate at the same time, the exhaust gas from the first compressor enters the second suction muffler (32) from the exhaust passage (41), Mixed silencing treatment is performed in the second suction muffler (32) with the gas entering the second suction muffler (32) from the air supply port (323), and the mixed silencing gas enters the second suction muffler (32). Two-stage compression is performed in the second compression chamber (311); when the second compressor operates alone, the gas entering the second suction muffler (32) from the supplemental air port (323) is in the second The suction muffler (32) enters into the second compression chamber (311) for compression after noise reduction. 5. A dual-engine compressor according to claim 4, characterized in that, a first exhaust cavity (42) is formed at the entrance of the exhaust passage (41) in the integral cylinder head (4) , the exhaust gas of the first compression chamber (211) enters the exhaust passage (41) through the first exhaust chamber (42). The dual-engine compressor according to claim 5, characterized in that, the integral cylinder head (4) is formed with a first escape space (45) at the outlet of the exhaust passage (41); The second suction muffler (32) is provided with a gas guide portion (324), and an intake passage and an air outlet passage are arranged in the gas guide portion (324), and the intake passage faces the exhaust passage ( 41) to open the first-stage exhaust inlet (321), and to open the second-stage suction inlet (322) to the side of the air outlet channel toward the second compression chamber (311); The exhaust gas inlet (321) and the secondary suction inlet (322) are arranged opposite to each other and connected integrally; Both the primary exhaust inlet (321) and the secondary suction inlet (322) are located in the first avoidance space (45), and the primary exhaust inlet (321) faces the exhaust The outlet of the passage (41) is communicated with the exhaust passage (41), and the secondary suction inlet (322) faces the second compression chamber (311) and communicates with the second compression chamber (311) The second exhaust cavity (43) is formed above the first avoidance space (45). 7 . The dual-engine compressor according to claim 6 , wherein the integral cylinder head ( 4 ) is formed with a second escape space ( 44 ) below the first exhaust chamber ( 42 ). 8 . , the exhaust port (221) is located in the second avoidance space (44), and the exhaust port (221) faces the first compression chamber (211) and is connected to the first compression chamber (211) ) are connected. 8. A dual-engine compressor according to any one of claims 2-7, wherein a first valve assembly (5) is provided between the first compressor and the integral cylinder head (4) , the first valve assembly (5) is provided with a first air flow passage connecting the exhaust port (221) with the first compression chamber (211), and the first compression chamber (211) a second airflow passage communicating with the first exhaust chamber (42); The gas exhausted from the exhaust port (221) enters the first compression chamber (211) through the first airflow path for compression, and then enters the first exhaust chamber (42) through the second airflow path )middle. 9 . The dual-engine compressor according to claim 8 , wherein the first valve assembly ( 5 ) comprises a direction along the integral cylinder head ( 4 ) to the first cylinder seat ( 21 ). 10 . A first cylinder head gasket (51), a first valve plate (52), a first intake valve plate (53) and a first intake valve plate gasket (54) arranged in sequence; A first cylinder head gasket suction port (511) is provided at a position corresponding to the exhaust port (221) of the first cylinder head gasket (51), which is connected to the first exhaust chamber (42) The corresponding position is provided with a first cylinder head gasket exhaust port (512); The first valve plate (52) is provided with a first valve plate suction port (521) at a position corresponding to the first cylinder head gasket suction port (511), which is connected to the first cylinder head gasket The position corresponding to the exhaust port (512) is provided with a first valve plate exhaust port (522); The first suction valve piece (53) is provided with a first suction valve piece suction port (531), and the first suction valve piece suction port (531) is provided with the first suction valve piece that can be opened and closed. A first reed spring piece (532) of the suction port (531) of the suction valve piece, the position of the first reed spring piece (532) corresponding to the exhaust port (522) of the first valve plate is provided with The first suction valve sheet exhaust port (533); The first suction valve sheet gasket (54) is provided with a first suction valve sheet gasket through hole (541) that communicates with the first compression chamber (211); The first cylinder head gasket intake port (511), the first valve plate intake port (521), the first intake valve sheet intake port (531) and the first intake valve The sheet gasket through hole (541) forms the first airflow passage; the first suction valve sheet gasket through hole (541), the first suction valve sheet exhaust port (533), the first suction valve sheet A valve plate exhaust port (522) and the first cylinder head gasket exhaust port (512) form the second airflow passage. 10. The dual-machine compressor according to claim 9, wherein the first valve plate (52) is provided with a first row for opening and closing the exhaust port (522) of the first valve plate an air valve plate (523), and a first lift limiter (524) matched with the first exhaust valve plate (523). 11. A dual-engine compressor according to claim 8, characterized in that a second valve assembly is provided between the second compressor and the integral cylinder head (4); the second valve assembly There is a third airflow passage connecting the secondary suction inlet (322) with the second compression chamber (311), and connecting the second compression chamber (311) with the second exhaust chamber (311). 43) a fourth airflow passage that communicates, and a fifth airflow passage that communicates the second exhaust cavity (43) with the exhaust through hole (312); The gas discharged from the secondary suction inlet (322) enters the second compression chamber (311) through the third airflow passage for compression, and then enters the second exhaust chamber (311) through the fourth airflow passage. 43), and finally the second compressor is discharged from the exhaust through hole (312) from the second exhaust chamber (43) through the fifth airflow passage. 12 . The dual-engine compressor according to claim 11 , wherein the second valve assembly comprises a series of valves arranged in sequence along the direction from the integral cylinder head ( 4 ) to the second cylinder seat ( 31 ). 13 . a second cylinder head gasket (61), a second valve plate (62), a second intake valve plate (63) and a second intake valve plate gasket (64); The position of the second cylinder head gasket (61) corresponding to the secondary suction inlet (322) is provided with a second cylinder head gasket suction port (611), which is connected to the second exhaust chamber ( 43) A second cylinder head gasket exhaust port (612) is provided at a corresponding position, and a second cylinder head gasket ventilation hole (613) is provided at a position corresponding to the exhaust through hole (312); The second valve plate (62) is provided with a second valve plate suction port (621) at a position corresponding to the second cylinder head gasket suction port (611), which is connected to the second cylinder head gasket The position corresponding to the exhaust port (612) is provided with a second valve plate exhaust port (622), and the position corresponding to the second cylinder head gasket vent hole (613) is provided with a second valve plate vent hole ( 625); The second suction valve sheet (63) is provided with a second suction valve sheet suction (631) port, and the second suction valve sheet suction (631) port is provided with a second openable and closable tongue A reed sheet (632), a position corresponding to the second reed sheet (632) and the second valve plate exhaust port (622) is provided with a second suction valve sheet exhaust port (633), which corresponds to the second valve plate exhaust port (633). The position corresponding to the second valve plate vent hole (625) is provided with a second suction valve sheet vent hole (634); The second suction valve sheet gasket (641) is provided with a second suction valve sheet gasket through hole (641) at the position corresponding to the opening of the second compression chamber (311), which is connected with the exhaust gas. The position corresponding to the through hole (312) is provided with a second suction valve sheet gasket ventilation hole (642); The second cylinder head gasket intake port (611), the second valve plate intake port (621), the second intake valve sheet intake (631) port and the second intake valve The sheet gasket through hole (641) forms the third airflow passage; the second suction valve sheet gasket through hole (641), the second suction valve sheet exhaust port (633), the second suction valve sheet The second valve plate exhaust port (622) and the second cylinder head gasket exhaust port (612) form the fourth airflow passage; the second cylinder head gasket vent hole (613), the second cylinder head gasket The valve plate vent hole (625), the second intake valve sheet vent hole (634) and the second intake valve sheet gasket vent hole (642) form the fifth airflow passage. 13. The dual-machine compressor according to claim 12, wherein the second valve plate (62) is provided with a second row for opening and closing the exhaust port (622) of the second valve plate an air valve plate (623), and a second lift limiter (624) matched with the second exhaust valve plate (623). 14. The dual-engine compressor according to claim 7, wherein an exhaust pipe is provided on the second cylinder block (31), and the exhaust pipe is connected to the exhaust through hole (312). ) are connected. 15. A refrigeration system, characterized in that the refrigeration system comprises a dual-machine compressor of any one of claims 1-14.

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