Economizer, compressor rotor assembly and compressor

Abstract

The utility model provides an economizer, a compressor rotor assembly and a compressor. The utility model provides an economizer. The economizer comprises an economizer body, a port assembly and a movable part. The economizer body comprises a first gas supply end. The port assembly is connected with the economizer main body; the port assembly is provided with an air supply cavity and a movable cavity communicated with the air supply cavity, the side wall of the port assembly is provided with a first port and a second port which are communicated with the air supply cavity, and the air supply cavity is communicated with the first air supply end. The movable part is movably arranged in the movable cavity, and the movable part has a first state and a second state; in the first state, a gap is formed between the movable part and the second port; in the second state, at least part of the movable part is located in the air supply cavity and is flush with the second port. Through the arrangement, gas leakage is prevented, and when the economizer is applied to the compressor, the overall compression efficiency of the compressor is improved.

Description

Technical Field

[0001] The present application relates to the field of compressors, and in particular to an economizer, a compressor rotor assembly and a compressor. Background Art

[0002] In a refrigeration unit, the role of the compressor is to suck the refrigerant from the evaporator, compress it into a high-temperature and high-pressure gas, and then dissipate the heat through the condenser and cool it into a high-pressure liquid. The compressor is one of the core components to realize the refrigeration cycle. The economizer can realize the air replenishment function in the compressor, increase the gas compression capacity of the compressor, and improve the efficiency of the refrigeration unit under certain conditions.

[0003] In the related art, when the economizer is used in a compressor, the economizer needs to be closed when some structures of the compressor do not need to be replenished with air. However, when the economizer is closed, the gas in some structures of the compressor will leak into the economizer, causing the gas in some structures of the compressor to need to be compressed again, thereby reducing the compression efficiency of the compressor. Utility Model Content

[0004] The present application provides an economizer, a compressor rotor assembly and a compressor which reduce gas leakage and improve compressor efficiency.

[0005] The present application provides an economizer, comprising:

[0006] The economizer body includes a first gas supply end;

[0007] A port assembly is connected to the economizer body; the port assembly is provided with an air supplement chamber and an active chamber connected to the air supplement chamber, a first port and a second port connected to the air supplement chamber are opened on a side wall of the port assembly, and the air supplement chamber is connected to the first air supply end;

[0008] A movable part is movably arranged in the movable cavity, and the movable part includes a first state and a second state; in the first state, there is a distance between the movable part and the second port; in the second state, at least a part of the movable part is located in the air replenishing cavity and is flush with the second port.

[0009] Optionally, it further comprises a switching component, which is arranged on the port component, the switching component comprises a second air supply end communicating with the active cavity, and the switching component and the second port are located on opposite sides of the active part;

[0010] The switching component includes a first mode and a second mode; in the first mode, the airflow pressure provided by the switching component to the active cavity is less than the external airflow pressure connected to the second port, and the movable part is in the first state; in the second mode, the airflow pressure provided by the switching component to the active cavity is greater than the external airflow pressure connected to the second port, and the movable part is in the second state.

[0011] Optionally, the switching component also has a first interface and a second interface connected to the second air supply end, the first interface is used to connect to a first pressure gas whose pressure is less than the external airflow pressure connected to the second port, and the second interface is used to connect to a second pressure gas whose pressure is greater than the external airflow pressure connected to the second port.

[0012] Optionally, the port assembly further includes a port shell and a port cover, the port shell is provided with the air replenishment chamber and the active chamber, the side wall of the port shell is provided with the first port and the second port; the port cover is sealingly connected to the side wall of the port shell away from the second port.

[0013] Optionally, the economizer further includes a sealing member disposed between an outer wall of the movable member and an inner wall of the movable chamber.

[0014] Optionally, the active cavity has a connecting port connected to the air replenishing cavity, the inner wall of the active cavity protrudes from the connecting port to form a limiting portion, at least part of the outer diameter of the movable part is smaller than the caliber of the connecting port, and at least part of the outer diameter of the movable part is larger than the caliber of the connecting port.

[0015] Optionally, the movable member is T-shaped, including a movable thick portion and a movable thin portion connected to the movable thick portion, the outer peripheral wall of the movable thick portion abuts against the inner side wall of the movable cavity, and the inner side wall of the movable thin portion abuts against the inner peripheral wall of the limiting portion.

[0016] When the movable member is in the first state, there is a distance between the movable thick portion and the limiting portion. When the movable member is in the second state, the movable thin portion abuts against the limiting portion.

[0017] Optionally, the economizer further comprises a positioning pin, wherein the positioning pin is fixed to the port assembly, the positioning pin is located on a side of the movable member away from the second port, and extends in a moving direction of the movable member.

[0018] The present application also provides a compressor rotor assembly, comprising:

[0019] shell,

[0020] a rotor, assembled in the housing and including a first side and a second side opposite to each other in the direction of the rotation axis, wherein a peripheral wall of the rotor surrounding the direction of the rotation axis forms an air flow channel between the first side and the second side; an air inlet is provided on the first side, and an air outlet is provided on the second side, and both the air inlet and the air outlet are connected to the air flow channel; and

[0021] In the economizer described in any of the aforementioned items, the port assembly is fixed to the shell, the second port is arranged between the air inlet and the air outlet, and is connected to the air flow channel, when the economizer body is in an open state, the movable part is in the first state, and when the economizer body is in a closed state, the movable part is in the second state.

[0022] Optionally, the first interface is connected to the air inlet, and the second interface is connected to the air outlet.

[0023] Optionally, the circumferential wall of the rotor surrounding the rotation axis includes a plurality of spiral teeth, a spiral groove is formed between two adjacent spiral teeth, and an air flow channel is formed between each spiral groove and the outer shell.

[0024] Optionally, the air supplement cavity is closer to the second side than the first side.

[0025] The port assembly is disposed on the second side, or;

[0026] The port assembly is arranged on the circumferential side of the rotor.

[0027] The present application also provides a compressor, which includes a compressor rotor assembly as described in any one of the above.

[0028] The economizer, compressor rotor assembly and compressor provided by the present application have a first port and a second port connected to the air replenishing chamber on the side wall of the port assembly, and the air replenishing chamber is connected to the first air supply end; when the movable part is in the first state, there is a distance between the movable part and the second port, and air can be replenished to the first air supply end and the air replenishing chamber through the economizer body, and the movable part cannot block the second port, and air can be replenished to the outside; when the movable part is in the second state, at least part of the movable part is located in the air replenishing chamber and is flush with the second port, so that the movable part blocks part of the air replenishing chamber, and the economizer body cannot replenish air to the second port. With such a configuration, when the economizer is applied to the compressor, the compressed gas of the compressor is prevented from leaking through the second port, thereby improving the overall compression efficiency of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0030] Figure 1 The diagram shows an embodiment of a movable part of a compressor rotor assembly of the present application in a first state.

[0031] Figure 2 The diagram shows an embodiment in which the movable part of the compressor rotor assembly of the present application is in the second state.

[0032] Figure 3 Shown is a schematic diagram of yet another embodiment of the present application in which the movable part of the compressor rotor assembly is in a first state.

[0033] Figure 4 Shown is a schematic diagram of yet another embodiment of the present application in which the movable part of the compressor rotor assembly is in the second state.

[0034] Description of reference numerals:

[0035] Compressor 100; compressor rotor assembly 200; housing 1; rotor 2; first side 21; second side 22; spiral teeth 23; spiral grooves 24; air inlet 25; air outlet 26; air supply port 27; air flow channel 28; economizer 3; economizer body 4; first air supply end 41; port assembly 5; air supply cavity 51; movable cavity 52; connecting port 521; limiting portion 522; first port 53; second port 54; port housing 55; port cover 56; movable part 6; movable thick part 61; movable thin part 62; switching assembly 7; second air supply end 71; first interface 72; second interface 73; sealing member 8; positioning pin 9. DETAILED DESCRIPTION

[0036] Here, the technical solutions in the embodiments (or "implementations") of the present application will be described clearly and completely in conjunction with the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0037] If there are terms involving directional indications or positional relationships in the embodiments of the present application (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings); if the specific posture changes, the directional indication or positional relationship will also change accordingly. In addition, the terms "first", "second", etc. involved in the embodiments of the present application are only used for the purpose of convenience of description and cannot be understood as indicating or implying relative importance.

[0038] The present application provides an economizer, including an economizer body, a port assembly and a movable part. The economizer body includes a first air supply end. The port assembly is connected to the economizer body; the port assembly is provided with an air replenishment chamber and an movable chamber connected to the air replenishment chamber, and the side wall of the port assembly is provided with a first port and a second port connected to the air replenishment chamber, and the air replenishment chamber is connected to the first air supply end. The movable part is movably arranged in the movable chamber, and the movable part includes a first state and a second state; in the first state, there is a distance between the movable part and the second port; in the second state, at least a part of the movable part is located in the air replenishment chamber and is flush with the second port. The side wall of the port assembly is provided with a first port and a second port connected to the air replenishing chamber, and the air replenishing chamber is connected to the first air supply end; when the movable part is in the first state, there is a distance between the movable part and the second port, and air can be replenished to the first air supply end and the air replenishing chamber through the economizer body, and the movable part cannot block the second port, and air can be replenished to the outside; when the movable part is in the second state, at least part of the movable part is located in the air replenishing chamber and is flush with the second port, so that the movable part blocks part of the air replenishing chamber, and the economizer body cannot replenish air to the second port. With such a configuration, when the economizer is applied to the compressor, the compressed gas of the compressor is prevented from leaking through the second port, thereby improving the overall compression efficiency of the compressor.

[0039] The present application provides an economizer, a compressor rotor assembly and a compressor. The economizer, the compressor rotor assembly and the compressor of the present application are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the features of the following embodiments and implementations can be combined with each other.

[0040] Figure 1 The schematic diagram of an embodiment of the movable member 6 of the compressor rotor assembly 200 of the present application in the first state is shown. Figure 1In the illustrated embodiment, the compressor 100 includes a compressor rotor assembly 200. The compressor 100 is a driven fluid machine that elevates low-pressure gas to high-pressure gas, and can be applied to fields such as refrigeration and air conditioning. The compressor rotor assembly 200 includes a housing 1, a rotor 2, and an economizer 3. The housing 1 is used to protect other components in the housing 1 of the compressor 100, such as a screw rotor, and the rotor 2 can be a screw rotor. The economizer 3 is used to replenish air to the rotor 2 to improve the compression efficiency of the compressor 100. The economizer 3 is used to control the energy inside the compressor 100. When the compressor 100 is working, the economizer 3 can adjust the intake and exhaust volume according to the load changes in the compressor 100, so as to increase the load and optimize the efficiency. The economizer 3 can be assembled outside the housing 1, and a through hole is provided at a position of the housing 1 close to the economizer 3, and the rotor 2 is connected to the port position of the economizer 3 through the through hole. The rotor 2 is assembled in the housing 1 and includes a first side 21 and a second side 22 opposite to each other in the direction of the rotation axis. The direction of the rotation axis can be the axial direction of the rotor 2, and the first side 21 and the second side 22 are distributed on opposite sides of the axial direction of the rotor 2. The peripheral wall of the rotor 2 surrounding the rotation axis forms an air flow channel 28 between the first side 21 and the second side 22. The air flow is compressed after passing through the air flow channel 28, and is compressed from low-pressure gas to high-pressure gas. In this embodiment, the peripheral wall of the rotor 2 surrounding the rotation axis includes a plurality of spiral teeth 23, and a spiral groove 24 is formed between two adjacent spiral teeth 23. A gas flow channel 28 is formed between each spiral groove 24 and the housing 1, and a compression volume is formed between the spiral groove 24. In this arrangement, the gas can pass through the spiral groove 24 through the air inlet 25 and then flow out through the air outlet 26. The first side 21 is provided with an air inlet 25, and the second side 22 is provided with an air outlet 26. The air inlet 25 and the air outlet 26 are both connected to the air flow channel 28. The air flow enters the air flow channel 28 from the air inlet 25 of the first side 21 in sequence, and then flows out of the air outlet 26 of the second side 22. In the compressor 100 , air flows from the air intake pipe of the compressor 100 into the air inlet 25 of the first side 21 , then into the air flow channel 28 , and then into the air outlet 26 of the second side 22 , and then flows out from the air discharge pipe of the compressor 100 .

[0041] Figure 2 The schematic diagram of an embodiment of the movable member 6 of the compressor rotor assembly 200 of the present application in the second state is shown. Figure 1 and Figure 2In the illustrated embodiment, the economizer 3 includes an economizer body 4, a port assembly 5, and a movable part 6. The economizer body 4 is used to supply air to an external component, the port assembly 5 is located between the economizer body 4 and the external component, and the movable part 6 moves to connect or block the passage between the economizer body 4 and the external component. In this embodiment, the external component may be the rotor 2 of the compressor 100. The economizer body 4 includes a first air supply end 41. The first air supply end 41 is used to supply air. The port assembly 5 is connected to the economizer body 4. The port assembly 5 is provided with an air supply cavity 51 and an movable cavity 52 connected to the air supply cavity 51. The air supply cavity 51 is used to connect the economizer body 4 and the external component, and is used to carry the movable part 6 before being moved. The side wall of the port assembly 5 is provided with a first port 53 and a second port 54 connected to the air supply cavity 51. In this embodiment, the side wall of the port assembly 5 may be the side wall of the top of the port assembly 5 and the side wall of the side of the two sides of the port assembly 5. The side wall of the port assembly 5 may also be the side wall of other parts, but is not limited thereto. The air-filling chamber 51 is connected to the first air supply end 41. The air-filling chamber 51 is connected to the economizer body 4 through the first air supply end 41. In this embodiment, the end of the air-filling chamber 51 close to the economizer body 4 forms a first port 53, and the end of the air-filling chamber 51 close to the external component forms a second port 54. The movable member 6 is movably arranged in the movable chamber 52. The movable member 6 moves in a direction close to or away from the external component. The movable member 6 includes a first state and a second state. In the first state, there is a gap between the movable member 6 and the second port 54. When the movable member 6 is in the first state, the movable member 6 is away from the external component. In this embodiment, the external component can be the rotor 2 of the compressor 100. In the second state, at least part of the movable member 6 is located in the air-filling chamber 51 and is flush with the second port 54. When the movable member 6 is in the second state, the movable member 6 is close to the external component. In this way, the side wall of the port assembly 5 is provided with a first port 53 and a second port 54 connected to the air-filling chamber 51, and the air-filling chamber 51 is connected to the first air supply end 41. When the movable member 6 is in the first state, there is a gap between the movable member 6 and the second port 54, and air can be supplied to the air supply chamber 51 through the first air supply end 41 of the economizer body 4, and the movable member 6 cannot block the second port 54, and air can be supplied to the outside. When the movable member 6 is in the second state, at least part of the movable member 6 is located in the air supply chamber 51 and is flush with the second port 54, so that the movable member 6 blocks part of the air supply chamber 51, and the economizer body 4 cannot supply air to the second port 54. When the economizer 3 is applied to the compressor 100, the compressed gas of the compressor 100 is prevented from leaking through the second port 54, so that the overall compression efficiency of the compressor 100 can be improved.

[0042] exist Figure 1 and Figure 2In the illustrated embodiment, when the economizer 3 is applied to the compressor 100, the economizer body 4 is used to supply air to the rotor 2, the port assembly 5 is located between the economizer body 4 and the rotor 2, and the movable member 6 moves to connect or block the passage between the economizer body 4 and the rotor 2. The air supply chamber 51 is used to connect the economizer body 4 and the rotor 2, and the movable chamber 52 is used to carry the movable member 6. The air supply chamber 51 is connected to the economizer body 4 through the first air supply end 41. In this embodiment, the end of the air supply chamber 51 close to the economizer body 4 forms a first port 53, and the end of the air supply chamber 51 close to the rotor 2 forms a second port 54. The movable member 6 moves in a direction close to or away from the rotor 2. When the movable member 6 is in the first state, the movable member 6 is away from the rotor 2. When the movable member 6 is in the second state, the movable member 6 is close to the rotor 2. In this arrangement, the compressed gas of the compressor 100 is prevented from leaking from the rotor 2 into the economizer 3, thereby improving the compression efficiency of the compressor 100.

[0043] exist Figure 1 and Figure 2 In the illustrated embodiment, the port assembly 5 is fixed to the housing 1, and the second port 54 is disposed between the air inlet 25 and the air outlet 26 and communicates with the air flow channel 28. The port assembly 5 may be disposed inside the housing 1, or outside the housing 1, or part of the port assembly 5 may be disposed inside the housing 1 and part of the port assembly 5 may be disposed outside the housing 1, but the invention is not limited thereto. When the economizer body 4 is in an open state, the movable member 6 is in a first state, and when the economizer body 4 is in a closed state, the movable member 6 is in a second state. The rotor 2 includes an air supply port 27, which is located between the air inlet 25 and the air outlet 26 and communicates with the air flow channel 28, and the second port 54 is disposed relative to the air supply port 27. With such an arrangement, when the economizer body 4 is in an open state, the movable member 6 is in a first state, so that the economizer body 4, the air supply cavity 51 and the air supply port 27 of the rotor 2 are interconnected, and the economizer body 4 can supply air to the rotor 2. When the economizer body 4 is in the closed state, the movable member 6 is in the second state, so that the economizer body 4 , the air supply cavity 51 and the air supply port 27 of the rotor 2 are interconnected, and the economizer body 4 can supply air to the rotor 2 .

[0044] exist Figure 2In the illustrated embodiment, the economizer 3 further includes a switching assembly 7, which is disposed in the port assembly 5. In the present embodiment, the movable member 6 is located between the switching assembly 7 and the second port 54. In the present embodiment, the switching assembly 7 may be a solenoid valve, or other valve structures, but is not limited thereto. The solenoid valve may be controlled by an on-board controller. The switching assembly 7 includes a second air supply end 71 connected to the active chamber 52, and the switching assembly 7 and the second port 54 are located on opposite sides of the movable member 6. Such an arrangement facilitates the control of the position of the movable member 6 by air pressure. The switching assembly 7 includes a first mode and a second mode. In the first mode, the air flow pressure provided by the switching assembly 7 to the active chamber 52 is less than the external air flow pressure connected to the second port 54, and the movable member 6 is in the first state. When the switching assembly 7 is in the first mode, the structure for providing gas externally provides low-pressure gas to the switching assembly 7, and the low-pressure gas is less than the pressure of the external air flow connected to the second port 54. In the present embodiment, the pressure of the external air flow connected to the second port 54 is the air flow pressure flowing through the position of the second port 54 close to the air flow channel 28 of the rotor 2 of the compressor 100. In this configuration, the pressure difference between the airflow pressure provided in the active cavity 52 and the external airflow pressure connected to the second port 54 is such that when the economizer 3 is in the open state, there is a gap between the movable part 6 and the second port 54, which does not affect the air supply of the economizer 3 to the outside. In this embodiment, the air supply of the economizer 3 to the compressor 100 is not affected. In the second mode, the airflow pressure provided by the switching component 7 to the active cavity 52 is greater than the external airflow pressure connected to the second port 54, and the movable part 6 is in the second state. When the switching component 7 is in the second mode, the structure for providing gas externally provides high-pressure gas to the switching component 7, and the high-pressure gas is greater than the external airflow pressure connected to the second port 54. In this embodiment, the external airflow pressure connected to the second port 54 is the airflow pressure flowing through the position of the second port 54 close to the airflow channel 28 of the rotor 2 of the compressor 100. With such arrangement, through the pressure difference between the air flow pressure provided in the active cavity 52 and the external air flow pressure connected to the second port 54, when the economizer 3 is in the closed state, at least a portion of the movable part 6 is located in the air supply cavity 51 and is flush with the second port 54. In this embodiment, the gas of the rotor 2 of the compressor 100 is prevented from leaking into the port assembly 5 of the economizer 3, thereby reducing gas leakage and improving the efficiency of the compressor 100.

[0045] exist Figure 2In the illustrated embodiment, the switching component 7 also has a first interface 72 and a second interface 73 connected to the second air supply end 71, the first interface 72 is used to access a first pressure gas whose pressure is less than the external airflow pressure connected to the second port 54, and the second interface 73 is used to access a second pressure gas whose pressure is greater than the external airflow pressure connected to the second port 54. Among them, the second air supply end 71 can be connected to the first interface 72, or the second air supply end 71 can be connected to the second interface 73. In this way, by switching the connection between different interfaces and the second air supply end 71, the active cavity 52 and different interfaces can be connected or blocked, so as to realize different modes of the switching component 7, which is more convenient and quick, and the method and structure are simple and the cost is low. The first interface 72 is connected to the air inlet 25, and the second interface 73 is connected to the air outlet 26. The air replenishing cavity 51 is close to the second side 22 relative to the first side 21. With such a configuration, it is not necessary to add other air supply structures. It is only necessary to connect the first interface 72 and the air inlet 25, so that the gas pressure of the first interface 72 can be less than the external air flow pressure connected to the second port 54, that is, the gas pressure of the first interface 72 is less than the air flow pressure flowing through the position of the second port 54 near the air flow channel 28 of the rotor 2; the second interface 73 is connected to the air outlet 26, so that the gas pressure of the second interface 73 can be greater than the external air flow pressure connected to the second port 54, that is, the gas pressure of the second interface 73 is greater than the air flow pressure flowing through the position of the second port 54 near the air flow channel 28 of the rotor 2. The structure is simple, and the first gas pressure and the second gas pressure provided by such a configuration are more applicable, so that the movable part 6 can be more stably in the first state and the second state, and the movable part 6 can be prevented from being unable to be in the required first state or second state according to the state of the economizer 3 due to the unstable or inaccurate gas pressure provided by other air supply structures, thereby improving the stability of the movable part 6. In this embodiment, the port assembly 5 is arranged on the second side 22. Such a configuration facilitates the assembly of the port assembly 5 and the rotor 2, and the structure of the port assembly 5 is more flat and easy to manufacture. When the port assembly 5 is arranged on the second side 22, the first interface 72 is connected to the air inlet 25, and the second interface 73 is connected to the air outlet 26. The air replenishment chamber 51 is close to the second side 22 relative to the first side 21. In this way, the gas pressure of the first interface 72 is less than the air flow pressure flowing through the position of the second port 54 close to the air flow channel 28 of the rotor 2 of the compressor 100, so that the movable part 6 is more stably in the first state, reducing the influence of the movable part 6 on the process of replenishing air from the economizer body 4 to the rotor 2.

[0046] exist Figure 2In the illustrated embodiment, the port assembly 5 further includes a port housing 55 and a port cover 56. The port housing 55 and the port cover 56 are used to protect the movable part 6 and other components inside the port assembly 5. Such arrangement facilitates assembly. In this embodiment, the port cover 56 is arranged near the second air supply end 71. The port housing 55 is provided with a gas replenishment chamber 51 and a movable chamber 52, and the side wall of the port housing 55 is provided with a first port 53 and a second port 54. Such arrangement facilitates the assembly of the port assembly 5 and the movable part 6. The port cover 56 is sealedly connected to the side wall of the port housing 55 away from the second port 54. Such arrangement prevents air leakage from the port cover 56 and the side of the port housing 55 away from the second port 54, thereby ensuring sealing. The economizer 3 further includes a sealing member 8, which is arranged between the outer wall of the movable part 6 and the inner wall of the movable chamber 52. The sealing member 8 may be a sealing ring with an O-ring, or may be other sealing members 8, but is not limited thereto. Such arrangement ensures a better sealing effect.

[0047] exist Figure 2 In the illustrated embodiment, the movable cavity 52 has a communication port 521 connected to the air-supplementing cavity 51, and the inner wall of the movable cavity 52 protrudes from the communication port 521 to form a limiting portion 522. The limiting portion 522 is used to limit the moving range of the movable member 6. The outer diameter of at least part of the movable member 6 is smaller than the caliber of the communication port 521. Such a configuration ensures that at least part of the movable member 6 can extend into the air-supplementing cavity 51 through the position of the communication port 521, so that the movable member 6 can extend into the air-supplementing cavity 51. In this embodiment, the outer wall of the movable member 6 contacts the outer wall of the communication port 521, so that the movable member 6 is more stable and less shaking. The outer diameter of at least part of the movable member 6 is larger than the caliber of the communication port 521. Such a configuration ensures that part of the movable member 6 can be restricted in the movable cavity 52, ensuring that the movable member 6 can switch between the first state and the second state more stably. The movable member 6 is T-shaped, including a movable thick portion 61 and a movable thin portion 62 connected to the movable thick portion 61. The outer peripheral wall of the movable thick part 61 abuts against the inner side wall of the movable cavity 52, and the inner side wall of the movable thin part 62 abuts against the inner peripheral wall of the limiting part 522. The movable thick part 61 can move in the movable cavity 52, and the movable thin part 62 can move in the movable cavity 52 and the air replenishing cavity 51. With such an arrangement, the movable part 6 has a simple structure and is easy to assemble. When the movable part 6 is in the first state, there is a spacing between the movable thick part 61 and the limiting part 522, and when the movable part 6 is in the second state, the movable thin part 62 abuts against the limiting part 522. In this embodiment, when the movable part 6 is in the first state, one end of the movable thick part 61 is close to the connecting port 521, and when the movable part 6 is in the second state, the movable thick part 61 is close to one end of the port cover 56. With such an arrangement, the movable part can be easily moved.

[0048] Figure 3FIG. 1 is a schematic diagram showing another embodiment of the movable member 6 of the compressor rotor assembly 200 of the present application in the first state. Figure 4 FIG. 2 is a schematic diagram showing another embodiment of the compressor rotor assembly 200 of the present application in which the movable member 6 is in the second state. Figure 3 and Figure 4 In the illustrated embodiment, the port assembly 5 is arranged on the circumferential side of the rotor 2. In some embodiments, the port assembly 5 can be arranged in the radial direction of the rotor 2. In this way, it can be arranged according to the position of the rotor 2 and the spatial layout of the port assembly 5, and the internal space layout of the compressor 100 is reasonable and more applicable. In some embodiments, when the port assembly 5 is arranged on the circumferential side of the rotor 2, in order to make the movable part 6 fit the rotor 2, the side of the movable part 6 close to the rotor 2 is set to an arc surface adapted to the rotor 2, and the arc surface is recessed toward the side away from the rotor 2. In this embodiment, the economizer 3 also includes a positioning pin 9. The positioning pin 9 is used to prevent the movable part from rotating. The positioning pin 9 is provided with two, and three, four, etc. can also be provided, but not limited to this. The cross-section of the positioning pin 9 can be rectangular, circular, elliptical, etc., but not limited to this. In this way, the possibility of the movable part 6 rotating in the port housing 55 is reduced. In some embodiments, when the positioning pin 9 is provided with one, the cross-section of the positioning pin 9 can be non-circular. The cross-section of the movable part 6 can also be set to be non-circular to prevent it from rotating. The positioning pin 9 is fixed to the port assembly 5. The positioning pin 9 is located on the side of the movable part 6 away from the second port 54 and extends in the moving direction of the movable part 6. In this embodiment, the positioning pin 9 is fixed to the port cover 56. When the port assembly 5 is arranged on the peripheral side of the rotor 2, the side of the movable part 6 close to the rotor 2 is set as an arc surface adapted to the rotor 2. When the movable part 6 includes an arc surface, the positioning pin 9 is located on the side away from the arc surface. In this way, the positioning pin 9 can prevent the movable part 6 from rotating, thereby preventing the movable part 6 from wearing on the rotor 2.

[0049] Combine the following Figure 1 and Figure 2 In the example shown, a compressor 100 using a compressor rotor assembly 200 provided in an embodiment of the present application is taken as an example, and its working principle is as follows:

[0050] During operation of the compressor 100, the air flows from the air intake pipe of the compressor 100 into the air inlet 25 of the first side 21 of the rotor 2, then into the air flow channel 28, then into the air outlet 26 of the second side 22, and then out of the exhaust pipe of the compressor 100. The gas entering from the air intake 25 is low-pressure gas, and the gas flowing out from the second side 22 after being compressed is high-pressure gas. When the rotor 2 needs to be supplemented with air, the economizer body 4 is turned on, the switching assembly 7 is powered on, and the gas is supplemented from the first air supply end 41 of the economizer body 4 to the air supply chamber 51, and flows from the first port 53 of the air supply chamber 51 to the second port 54, and then enters the air flow channel 28 of the rotor 2. In this case, a first pressure gas having a pressure less than that of the external airflow connected to the second port 54 is connected to the first interface 72 of the switching component 7, and the first interface 72 can be connected to the air inlet 25. In this way, the gas pressure on the side of the movable part 6 close to the second port 54 is greater than the gas pressure on the side of the movable part 6 close to the switching component 7. At this time, the movable part 6 is in the first state, and there is a distance between the movable part 6 and the second port 54. In this state, the economizer 3 is connected to the rotor 2, so that the economizer 3 can replenish air to the rotor 2. When there is no need to replenish air in the rotor 2, the economizer 3 is closed, the gas stops the first air supply end 41 of the economizer body 4 to replenish air to the air replenishment chamber 51, the switching component 7 is powered off, and the second port 54 of the switching component 7 is connected to a second pressure gas that is greater than the external air flow pressure connected to the second port 54. The second interface 73 can be connected to the air outlet. In this way, the gas pressure on the side of the movable part 6 close to the second port 54 is less than the gas pressure on the side of the movable part 6 close to the switching component 7. At this time, the movable part 6 is in the second state, and at least a part of the movable part 6 is located in the air replenishment chamber 51 and is flush with the second port 54. In this state, the economizer 3 is not connected to the rotor 2, so that the gas in the multiple spiral grooves 24 of the rotor 2 cannot leak into the economizer, thereby improving the compression efficiency of the compressor 100.

[0051] It should be noted that the technical solutions or technical features described in the above embodiments can be combined or supplemented with each other without causing conflicts. The scope of protection of this application is not limited to the precise structures described in the above embodiments and shown in the drawings; all modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of this application should be included in the scope of protection of this application.

Claims

1. An economizer, characterized in that: include: The economizer body includes a first gas supply end; A port assembly connected to the economizer body; The port assembly is provided with an air supplement cavity and an active cavity communicating with the air supplement cavity, a first port and a second port communicating with the air supplement cavity are opened on a side wall of the port assembly, and the air supplement cavity is communicated with the first air supply end; A movable part is movably arranged in the movable cavity, and the movable part includes a first state and a second state; in the first state, there is a distance between the movable part and the second port; in the second state, at least a part of the movable part is located in the air replenishing cavity and is flush with the second port.

2. The economizer according to claim 1, characterized in that: It also includes a switching component, which is arranged on the port component, the switching component includes a second air supply end communicating with the active cavity, and the switching component and the second port are located on opposite sides of the active part; The switching component includes a first mode and a second mode; in the first mode, the airflow pressure provided by the switching component to the active cavity is less than the external airflow pressure connected to the second port, and the movable part is in the first state; in the second mode, the airflow pressure provided by the switching component to the active cavity is greater than the external airflow pressure connected to the second port, and the movable part is in the second state.

3. The economizer according to claim 2, characterized in that: The switching component also has a first interface and a second interface connected to the second air supply end, the first interface is used to connect to a first pressure gas whose pressure is less than the external airflow pressure connected to the second port, and the second interface is used to connect to a second pressure gas whose pressure is greater than the external airflow pressure connected to the second port.

4. The economizer according to claim 1, characterized in that: The port assembly further comprises a port shell and a port cover, wherein the port shell is provided with the air supplement cavity and the active cavity, and the side wall of the port shell is provided with the first port and the second port; the port cover is sealedly connected to a side wall of the port shell away from the second port; and / or The economizer further includes a sealing member disposed between an outer wall of the movable member and an inner wall of the movable chamber.

5. The economizer according to claim 1, characterized in that: The movable cavity has a connecting port connected to the air replenishing cavity, the inner wall of the movable cavity protrudes from the connecting port to form a limiting portion, the outer diameter of at least part of the movable parts is smaller than the caliber of the connecting port, and the outer diameter of at least part of the movable parts is larger than the caliber of the connecting port.

6. The economizer according to claim 5, characterized in that: The movable part is T-shaped, including a movable thick part and a movable thin part connected to the movable thick part, the outer peripheral wall of the movable thick part abuts against the inner side wall of the movable cavity, and the inner side wall of the movable thin part abuts against the inner peripheral wall of the limiting part. When the movable member is in the first state, there is a distance between the movable thick portion and the limiting portion. When the movable member is in the second state, the movable thin portion abuts against the limiting portion.

7. The economizer according to claim 1, characterized in that: The economizer further includes a positioning pin, which is fixed to the port assembly. The positioning pin is located on a side of the movable member away from the second port and extends in a moving direction of the movable member.

8. A compressor rotor assembly, characterized in that: include: shell, a rotor, assembled in the housing and including a first side and a second side opposite to each other in the direction of the rotation axis, wherein a peripheral wall of the rotor surrounding the direction of the rotation axis forms an air flow channel between the first side and the second side; an air inlet is provided on the first side, and an air outlet is provided on the second side, and both the air inlet and the air outlet are connected to the air flow channel; and The economizer according to any one of claims 1 to 7, wherein the port assembly is fixed to the housing, the second port is arranged between the air inlet and the air outlet and is communicated with the air flow channel, and when the economizer body is in an open state, the movable part is in the first state, and when the economizer body is in a closed state, the movable part is in the second state.

9. The compressor rotor assembly according to claim 8, characterized in that: The first interface is connected to the air inlet, and the second interface is connected to the air outlet.

10. The compressor rotor assembly according to claim 8, characterized in that The peripheral wall of the rotor surrounding the rotation axis includes a plurality of spiral teeth, a spiral groove is formed between two adjacent spiral teeth, and an air flow channel is formed between each spiral groove and the housing.

11. The compressor rotor assembly according to claim 8 or 9, characterized in that: The air supplement cavity is closer to the second side than the first side. The port assembly is disposed on the second side, or; The port assembly is arranged on the circumferential side of the rotor.

12. A compressor, characterized in that: The compressor comprises a compressor rotor assembly as claimed in any one of claims 8 to 11 above.

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