CN103291624B - A kind of mixing chamber external type single twin-stage hermetically sealed compressor - Google Patents

Abstract

The utility model relates to a single-unit two-stage hermetic refrigeration compressor with a mixing chamber installed, which belongs to the technical field of refrigeration compressors. The motor, low-pressure stage and high-pressure stage form the internal structure of the compressor, which are placed in the compressor shell; the suction pipe is connected to the gas-liquid separator, and the exhaust pipe is connected to the upper part of the compressor shell; the mixing chamber is composed of a mixing chamber cylinder Body, low-pressure stage exhaust pipe, high-pressure stage suction pipe, air supply pipe, and oil return hole; the gas-liquid separator and mixing chamber are placed outside the closed shell of the compressor, and the air supply pipe connected to the system flasher is connected to In the upper part of the mixing chamber, the suction port of the high-pressure stage suction pipe avoids the air supply pipe and the low-pressure stage exhaust pipe, and is connected with the high-pressure stage suction chamber; the low-pressure stage exhaust pipe is connected with the low-pressure stage exhaust chamber. In the present invention, the mixing chamber is arranged outside the compressor, which simplifies the internal structure of the compressor and facilitates fault diagnosis; the exhaust heat of the low-pressure stage is easier to dissipate, which improves the compression efficiency; facilitates the separation and return of lubricating oil, and improves the stability of operation .

Description

A single-unit two-stage hermetic refrigeration compressor with a mixing chamber

technical field

The invention relates to the technical field of refrigeration compressors, in particular to a single-unit two-stage hermetic refrigeration compressor with a mixing chamber.

Background technique

To improve the energy efficiency of the room air conditioner refrigeration system, a single-unit two-stage compression refrigeration cycle with intermediate air supply is an effective way. As shown in Figure 1, it is a flow chart of a single-unit two-stage hermetic refrigeration compressor with a mixing chamber installed in a refrigeration system, including a compressor 101, a four-way reversing valve 102, an outdoor heat exchanger 103, and a first-stage capillary tube 104, flasher 105, secondary capillary 106, indoor heat exchanger 107. When used as refrigeration, the refrigerant flow direction is indicated by the white arrow. The working process is as follows: the exhaust gas from the compressor first enters the outdoor heat exchanger 103 after passing through the four-way reversing valve 102, and then enters the first-stage capillary tube 104 after being turned into a liquid refrigerant. into the flasher 105, the flashed gas enters the mixing chamber through the gas supply line, and the supercooled liquid in the main path enters the secondary capillary tube 106 for secondary throttling, and the throttled gas-liquid two-phase low-pressure refrigerant Enter the indoor heat exchanger 107, and absorb the heat in the indoor air through evaporation to achieve the cooling effect. The low-pressure gaseous refrigerant exiting the indoor heat exchanger 107 enters the compressor through the suction port of the compressor to complete a refrigeration cycle. When used for heating, the refrigerant flow direction is indicated by the black arrow. The working process is as follows: the exhaust gas from the compressor first enters the indoor heat exchanger 107 after passing through the four-way reversing valve 102, and then enters into the secondary capillary tube 106 after being turned into a liquid refrigerant, and then enters the into the flasher 105, the flashed gas enters the compressor through the gas supply line, and the subcooled liquid in the main path enters the first-stage capillary tube 104 for secondary throttling, and the gas-liquid two-phase low-pressure refrigerant after throttling into the outdoor heat exchanger 103 to absorb the heat in the outdoor air through evaporation. The low-pressure gaseous refrigerant exiting the outdoor heat exchanger 103 enters the compressor through the suction port of the compressor to complete a heating cycle.

Among them, the key technology is the type of refrigeration cycle and the design of the mixing chamber. Reasonable type and mixing chamber structure should have the following properties:

1) The heat of the low-pressure stage exhaust can be dissipated conveniently;

2) The gas refrigerant and the lubricating oil in the chamber can be separated in time, and the oil can be returned in time through the high-pressure stage suction;

3) Simplify the internal structure of the main body of the compressor and improve the operation stability of the system.

Contents of the invention

The invention provides a single-unit two-stage fully-enclosed refrigeration compressor with a mixing chamber installed, aiming at improving the energy efficiency of a refrigeration and air-conditioning system with air supplementation in the middle of two-stage compression.

A single-unit two-stage hermetic refrigeration compressor with a mixing chamber, including a low-pressure stage, a vapor-liquid separator, a suction pipe, a motor, an exhaust pipe, a high-pressure stage, a mixing chamber cylinder, a low-pressure stage exhaust pipe, and a high-pressure stage suction pipe. Air pipe, air supply pipe, oil return hole; among them: the motor, low-pressure stage and high-pressure stage form the internal structure of the compressor, which are placed in the compressor shell; the suction pipe is connected to the vapor-liquid separator, and the exhaust pipe is connected to the The upper part of the compressor housing; the mixing chamber is composed of a mixing chamber cylinder, a low-pressure stage exhaust pipe, a high-pressure stage suction pipe, an air supply pipe, and an oil return hole; the vapor-liquid separator and the mixing chamber are placed outside the closed shell of the compressor , there are three connecting pipes on the mixing chamber, the air supply pipe connected to the system flasher is connected to the upper part of the mixing chamber, the suction port of the high-pressure stage suction pipe avoids the air supply pipe and the low-pressure stage exhaust pipe, and is connected with the high-pressure stage The chamber is connected; the exhaust pipe of the low-pressure stage is connected with the exhaust chamber of the low-pressure stage.

The shape of the mixing chamber cylinder includes cylindrical, spherical or elliptical cylinder with and without head.

The compressor is a rotary compressor or a piston compressor with an intermediate air supply device; the rotary compressor includes a single-unit two-stage rolling piston compressor and a sliding vane compressor.

The connection between the low-pressure stage exhaust pipe and the high-pressure stage suction pipe and the mixing chamber, the upper and lower positions are interchanged according to the arrangement of the low-pressure stage and high-pressure stage of the compressor. The high-pressure stage suction pipe is provided with an oil return hole inside the mixing chamber.

The low-pressure stage exhaust pipe is located at the lower part of the mixing chamber cylinder; the high-pressure stage suction pipe enters from the upper part of the mixing chamber cylinder, forming a "U" shape in the mixing chamber cylinder, with an oil return hole at the bottom.

The low-pressure stage exhaust pipe is located in the upper part of the mixing chamber cylinder; the high-pressure stage suction pipe enters from the lower part of the mixing chamber cylinder.

According to another aspect of the present invention, a single-unit two-stage hermetic refrigeration compressor with a mixing chamber is provided, comprising: a compressor casing, a motor, a low-pressure stage, and a high-pressure stage are arranged inside the compressor casing; the mixing chamber, It includes a mixing chamber cylinder with an inner cavity, and the mixing chamber is located outside the compressor housing; a low-pressure stage exhaust pipe, the first end of the low-pressure stage exhaust pipe communicates with the inner cavity of the mixing chamber cylinder, and the second end communicates with the low-pressure stage exhaust pipe. The exhaust chamber of the stage is connected; the air supply pipe, the first end of the air supply pipe is connected with the inner cavity of the mixing chamber cylinder, and the first end of the air supply pipe is located at the upper part of the mixing chamber cylinder; the high pressure level suction pipe, the high pressure level suction The first end of the pipe communicates with the inner cavity of the mixing chamber cylinder, and the second end of the high-pressure stage suction pipe communicates with the high-pressure stage suction cavity.

Further, the single-unit two-stage hermetic refrigeration compressor with a mixing chamber installed further includes a gas-liquid separator communicated with the compressor casing, and a suction pipe is connected to the gas-liquid separator.

Further, the shape of the mixing chamber is cylindrical, or spherical, or elliptical cylindrical.

Further, the compressor is a rotary compressor or a piston compressor with an intermediate air supply device.

Further, the rotary compressor includes a vane compressor, and the piston compressor includes a single-unit two-stage rolling piston compressor.

Further, the part of the high-pressure suction pipe located in the inner cavity of the mixing chamber cylinder is provided with an oil return hole.

Further, the first end of the low-pressure stage exhaust pipe is located at the bottom of the mixing chamber cylinder; the second end of the high-pressure stage suction pipe passes through the upper part of the mixing chamber cylinder, and the high-pressure stage suction pipe is located at the bottom of the mixing chamber cylinder. The part is U-shaped, and the oil return hole is located at the bend of the U-shaped part of the high-pressure stage suction pipe.

Further, the first end of the low-pressure stage exhaust pipe is located at the top of the mixing chamber cylinder; the first end of the high-pressure stage suction pipe is located at the bottom of the mixing chamber cylinder, and the second end of the high-pressure stage suction pipe is connected from the mixing chamber cylinder. The lower part of the body pierces.

The present invention can obtain the following beneficial effects: the mixing chamber is arranged outside the compressor, which simplifies the internal structure of the compressor and facilitates fault diagnosis; after the mixing chamber is installed, the exhaust heat of the low-pressure stage can be dissipated more easily, and at the same time, the heat generated by the motor is avoided. The secondary heating of the compressed working fluid improves the compression efficiency; at the same time, it facilitates the separation and return of lubricating oil and improves the stability of operation.

Description of drawings

The accompanying drawings constituting a part of the present application are used to provide a further understanding of the present invention, and the schematic embodiments and descriptions of the present invention are used to explain the present invention, and do not constitute an improper limitation of the present invention. In the attached picture:

Fig. 1 is a flow chart of the use of a single-unit two-stage hermetic refrigeration compressor with a mixing chamber in a refrigeration system;

Fig. 2 is a structural schematic diagram of a single-unit two-stage hermetic refrigeration compressor with a mixing chamber installed in the present invention, the exhaust pipe of the low-pressure stage is on the bottom, and the suction pipe of the high-pressure stage is on the top;

Fig. 3 is a structural schematic diagram of a single-unit two-stage hermetic refrigeration compressor with a mixing chamber installed in the present invention, the low-pressure stage exhaust pipe is on the top, and the high-pressure stage suction pipe is on the bottom;

In Fig. 2 and Fig. 3, 1. Low pressure stage; 2. Vapor-liquid separator; 3. Suction pipe; 4. Motor; 5. Exhaust pipe; 6. High pressure stage; 7. Mixing chamber cylinder; 8. Low pressure 9. High-pressure suction pipe; 10. Air supply pipe; 11. Oil return hole.

detailed description

It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

Example 1:

As shown in Figure 2, a single-unit two-stage hermetic refrigeration compressor with a mixing chamber installed, the low-pressure stage discharge pipe is at the bottom, and the high-pressure stage suction pipe is at the top. The compressor used is a rolling piston compressor. Including low-pressure stage 1, vapor-liquid separator 2, suction pipe 3, motor 4, exhaust pipe 5, high-pressure stage 6, mixing chamber cylinder 7, low-pressure stage exhaust pipe 8, high-pressure stage suction pipe 9, air supply pipe 10. The oil return hole 11 is formed. Among them: motor 4, low-pressure stage 1 and high-pressure stage 6 constitute the internal structure of the compressor. The suction pipe 3 is connected to the vapor-liquid separator 2, and the exhaust pipe 5 is connected to the upper part of the compressor housing. The mixing chamber is composed of a mixing chamber cylinder 7, a low-pressure exhaust pipe 8, a high-pressure suction pipe 9, an air supply pipe 10, and an oil return hole 11. The vapor-liquid separator 2 and the mixing chamber are placed outside the closed shell of the compressor, and there are three connecting pipes connected to the mixing chamber, which are the low-pressure stage exhaust pipe 8, the air supply pipe 10 and the high-pressure stage suction pipe 9, and the low-pressure stage exhaust pipe. The first end of the air pipe 8 communicates with the inner cavity of the mixing chamber cylinder 7, the second end communicates with the exhaust cavity of the low-pressure stage 1, the first end of the air supply pipe 10 communicates with the inner cavity of the mixing chamber cylinder 7, and The first end of the air pipe 10 is located on the upper part of the mixing chamber cylinder 7; the first end of the high-pressure stage suction pipe 9 communicates with the inner cavity of the mixing chamber cylinder 7, and the second end of the high-pressure stage suction pipe 9 communicates with the high-pressure stage 6 The suction cavity is connected.

Arranging the mixing chamber outside the compressor simplifies the internal structure of the compressor and facilitates fault diagnosis; after the mixing chamber is placed, it makes it easier to dissipate the exhaust heat of the low-pressure stage, and at the same time avoids the secondary heating of the compressed working medium by the heat generated by the motor. Improve compression efficiency; at the same time, it is beneficial to the separation and return of lubricating oil, and improves the stability of operation.

The compressor is a rotary compressor with an intermediate air supply device. In other embodiments the rotary compressor includes a vane compressor. In another embodiment not shown, the compressor is a rolling piston compressor, and the rolling piston compressor includes a single-unit two-stage rolling piston compressor.

The mixing chamber is external and is in the shape of a cylinder with an oval head. In other unshown embodiments, the shape of the mixing chamber is spherical or elliptical cylinder.

The first end of the low-pressure stage exhaust pipe 8 is located at the bottom of the mixing chamber cylinder 7; the second end of the high-pressure stage suction pipe 9 passes through the upper part of the mixing chamber cylinder 7, and the high-pressure stage suction pipe 9 is located at the mixing chamber cylinder. The part inside the body 7 is U-shaped, and the oil return hole 11 is located at the bottom of the U-shaped part of the high-pressure stage suction pipe 9, that is, the bend of the U-shaped part.

The discharge pipe of the low-pressure stage of the compressor is on the bottom, and the suction pipe of the high-pressure stage is on the top. There is a U-shaped bend in the high-pressure stage suction pipe inside the mixing chamber, and three circular oil return holes with a diameter of 1mm are arranged at the U-shaped bend.

Example 2:

As shown in Figure 3, a structural diagram of a single-unit two-stage hermetic refrigeration compressor with a mixing chamber installed, the low-pressure stage exhaust pipe is on the top, and the high-pressure stage suction pipe is on the bottom. The structure is basically the same as that of Example 1, except that the upper and lower positions of the low-pressure stage exhaust pipe and the high-pressure stage suction pipe are interchanged. The first end of the low-pressure stage exhaust pipe 8 is positioned at the top of the mixing chamber shell 7; the first end of the high-pressure stage suction pipe 9 is positioned at the bottom of the mixing chamber shell 7, and the second end of the high-pressure stage suction pipe 9 is connected from the mixing chamber. The lower part of the chamber cylinder body 7 passes out. The high-pressure suction pipe is a straight pipe in the mixing chamber housing, and three circular oil return holes with a diameter of 1mm are arranged on the pipe wall of the straight pipe.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (12)

1. A single-unit two-stage hermetic refrigeration compressor with a mixing chamber, including a low-pressure stage (1), a gas-liquid separator (2), a suction pipe (3), a motor (4), an exhaust pipe (5), High-pressure stage (6), mixing chamber cylinder (7), low-pressure stage exhaust pipe (8), high-pressure stage suction pipe (9), air supply pipe (10), oil return hole (11); among them: motor (4 ), the low-pressure stage (1) and the high-pressure stage (6) form the internal structure of the compressor and are placed in the compressor housing; the suction pipe (3) is connected to the vapor-liquid separator (2), and the exhaust pipe (5 ) is connected to the upper part of the compressor housing; the mixing chamber consists of a mixing chamber cylinder (7), a low-pressure stage exhaust pipe (8), a high-pressure stage suction pipe (9), an air supply pipe (10), and an oil return hole (11) Composition; It is characterized in that the gas-liquid separator (2) and the mixing chamber are placed outside the closed shell of the compressor, and there are three connecting pipes on the mixing chamber, and the air supply pipe (10) connected to the system flasher is connected to the mixing chamber The upper part of the upper part, the suction port of the high-pressure stage suction pipe (9) avoids the air supply pipe (10) and the low-pressure stage exhaust pipe (8), and links to each other with the suction chamber of the high-pressure stage (6); the low-pressure stage exhaust pipe (8 ) is connected to the exhaust cavity of the low-pressure stage (1), the upper and lower positions of the low-pressure stage exhaust pipe (8), the high-pressure stage suction pipe (9) and the connecting pipe of the mixing chamber are connected with the compressor low-pressure stage (1), high-pressure stage The upper and lower positions of the stage (6) correspond, and the high-pressure stage suction pipe (9) is provided with an oil return hole inside the mixing chamber. 2. A single-unit two-stage hermetic refrigeration compressor with a mixing chamber installed according to claim 1, characterized in that: the shape of the mixing chamber cylinder (7) includes a cylindrical shape with or without a head, a spherical shape or elliptical cylinder. 3. A single-unit two-stage hermetic refrigeration compressor with a mixing chamber installed according to claim 1, characterized in that: the compressor is a rotary compressor with an intermediate air supply device; the rotary compressor Machines include single-unit two-stage rolling piston compressors or sliding vane compressors. 4. A kind of mixing room built-in single-unit two-stage hermetic refrigeration compressor according to claim 1, characterized in that: the low-pressure stage exhaust pipe (8) is located at the lower part of the mixing chamber cylinder (7); The stage suction pipe (9) enters from the top of the mixing chamber cylinder body (7), becomes a "U" shape in the mixing chamber cylinder body (7), and the bottom end is provided with an oil return hole (11). 5. A single-unit two-stage hermetic refrigeration compressor with a mixing chamber installed according to claim 1, characterized in that: the low-pressure stage exhaust pipe (8) is located on the upper part of the mixing chamber cylinder (7); The stage suction pipe (9) enters from the bottom of the mixing chamber cylinder (7). 6. A single-unit two-stage hermetic refrigeration compressor with a mixing chamber, characterized in that it includes: A compressor housing, the interior of the compressor housing is provided with a motor (4), a low-pressure stage (1) and a high-pressure stage (6); a mixing chamber comprising a mixing chamber cylinder (7) having an inner cavity, said mixing chamber being located outside said compressor housing; A low-pressure stage exhaust pipe (8), the first end of the low-pressure stage exhaust pipe (8) communicates with the inner cavity of the mixing chamber cylinder (7), and the second end communicates with the low-pressure stage (1) The exhaust cavity is connected; An air supply pipe (10), the first end of the air supply pipe (10) communicates with the inner cavity of the mixing chamber cylinder (7), and the first end of the air supply pipe (10) is located in the mixing chamber cylinder the upper part of (7); A high-pressure stage suction pipe (9), the first end of the high-pressure stage suction pipe (9) communicates with the inner cavity of the mixing chamber cylinder (7), and the first end of the high-pressure stage suction pipe (9) The two ends communicate with the suction cavity of the high-pressure stage (6), and the part of the high-pressure stage suction pipe (9) located in the inner cavity of the mixing chamber cylinder (7) is provided with an oil return hole (11). 7. The single-unit two-stage hermetic refrigerating compressor with an external mixing chamber according to claim 6, characterized in that the external single-unit two-stage hermetic refrigerating compressor with an external mixing chamber further includes a steam compressor connected to the compressor shell. A liquid separator (2), the gas-liquid separator (2) is connected with a suction pipe (3). 8. The single-unit two-stage hermetic refrigeration compressor with a mixing chamber installed according to claim 6, characterized in that, the shape of the mixing chamber is cylindrical, or spherical, or elliptical cylindrical. 9. The single-unit two-stage hermetic refrigeration compressor with a mixing chamber installed according to claim 6, wherein the compressor is a rotary compressor with an intermediate air supply device. 10. The single-unit two-stage hermetic refrigeration compressor with a mixing chamber installed according to claim 9, wherein the rotary compressor comprises a vane compressor or a single-unit two-stage rolling piston compressor. 11. The mixing chamber-mounted single-unit two-stage hermetic refrigeration compressor according to claim 6, characterized in that, The first end of the low-pressure stage exhaust pipe (8) is located at the bottom of the mixing chamber cylinder (7); The second end of the high-pressure stage suction pipe (9) passes through the upper part of the mixing chamber cylinder (7), and the high-pressure stage suction pipe (9) is located in the part inside the mixing chamber cylinder (7) It is U-shaped, and the oil return hole (11) is located at the bend of the U-shaped part of the high-pressure stage suction pipe (9). 12. The mixing chamber-mounted single-unit two-stage hermetic refrigeration compressor according to claim 6, characterized in that, The first end of the low-pressure stage exhaust pipe (8) is located on the upper part of the mixing chamber cylinder (7); The first end of the high-pressure stage suction pipe (9) is located at the lower part of the mixing chamber cylinder (7), and the second end of the high-pressure stage suction pipe (9) is connected from the mixing chamber cylinder (7) ) pierces through the lower part.