WO2021184612A1 - Compressor, compressor operation control method and refrigeration device - Google Patents

Abstract

A compressor, a compressor operation control method and a refrigeration device. The compressor comprises: a housing (110), which is configured to be a containing cavity provided with an air vent (112); a pump body (120), disposed in the containing cavity and comprising an air suction chamber, a capacity changing chamber and an exhaust chamber which communicate with one another, the exhaust chamber being in communication with the containing cavity; a liquid storage device (130), disposed outside the housing (110) and communicating with the air suction chamber; and a valve module (200), arranged outside the housing (110) and at least comprising a first port, a second port and a third port, the first port being in communication with the capacity changing chamber, the second port being in communication with the air suction chamber, and the third port being in communication with the exhaust chamber or the containing cavity. According to the compressor, the communicating states of the first port, the second port and the third port are switched by means of the valve module so as to adjust the pressure state of the capacity changing chamber in order to achieve a full-capacity operating mode and a partial-capacity operating mode of the compressor. The compressor is simple in structure and low in cost.

Description

Compressor, compressor operation control method and refrigeration equipment

This application claims the priority of a Chinese patent application filed with the Chinese Patent Office on March 18, 2020 with the application number "202010189977.8" and the invention title "Compressor, compressor operation control method and refrigeration equipment", and its entire content Incorporated in this application by reference.

Technical field

This application relates to the technical field of compressors, and in particular to a compressor, a compressor operation control method, and refrigeration equipment.

Background technique

In the current variable capacity compressors, the variable capacity mechanisms mostly rely on changes in gas pressure to achieve capacity changes. For common variable displacement compressors that use sliding vanes or plungers as unloading devices, in order to achieve high pressure or low pressure to the back of the sliding vanes or plungers, a pressure signal tube needs to be provided on the structure of the compressor. This pressure signal tube Lead out from the inside of the compressor housing and split through a three-way pipe to connect to the exhaust pipe and suction pipe of the air conditioning system. In order to switch between high-pressure and low-pressure signals, the two branches of the three-way pipe are also required. Two more valves are added, and the pressure switch behind the sliding vane or plunger is realized through the combination of the open or closed states of the two valves. Due to the existence of the pressure signal tube and the valve, the structure of the compressor is not simple enough, and the cost of the control system is increased.

Summary of the invention

This application aims to solve at least one of the technical problems existing in the prior art or related technologies.

For this reason, the first aspect of the present application proposes a compressor.

The second aspect of the present application proposes a compressor operation control method.

The third aspect of the application proposes a refrigeration equipment.

In view of this, the first aspect of the present application proposes a compressor, including: a casing configured as a containing cavity with an exhaust port; a pump body disposed in the containing cavity, and the pump body includes a communicating The suction chamber, the variable volume chamber and the exhaust chamber. The exhaust chamber is connected to the containing chamber; the accumulator is arranged on the outside of the housing and communicates with the suction chamber; the valve assembly is arranged in Outside of the housing, the valve assembly includes at least a first port, a second port, and a third port. The first port is connected to the variable volume chamber, the second port is connected to the suction chamber, and the third port is connected to the exhaust. The chamber or the accommodating chamber is in communication; wherein the valve assembly is configured to be adapted to switch the communication state of the first port, the second port and the third port.

The compressor provided in the present application includes a casing, a pump body, a liquid reservoir, and a valve assembly. The casing is a containing cavity with an exhaust port. Set inside the accommodating cavity, the pump body includes a connected suction chamber, a variable volume chamber, and an exhaust chamber, wherein the suction chamber is in communication with the accumulator, and the exhaust chamber is in communication with the accommodating chamber , The low-pressure gas is sucked into the accumulator through the suction port of the accumulator, enters the pump body inside the compressor, is compressed into high-pressure gas by the pump body, and is discharged from the housing through the exhaust port through the containing chamber. The valve assembly is provided with a first port that communicates with the variable volume chamber, a second port that communicates with the suction chamber, and a third port that communicates with the exhaust chamber or the accommodating chamber, so that the valve assembly can switch the first port. The communication state of the first port, the second port, and the third port can adjust the pressure state of the variable volume chamber, and then can realize the compressor full capacity operation mode or partial capacity operation mode, so that when the refrigeration load is large, the compressor Work in full capacity operation mode; when the refrigeration load is small, the compressor works in partial capacity operation mode, which can avoid the frequent start and stop of the compressor and the reduction of partial capacity efficiency that exist in the fixed speed air conditioning system in the partial capacity operation mode, so that it has The cooling season energy efficiency ratio of the air conditioning system of the variable capacity compressor is much higher than that of the fixed speed air conditioning system. Compared with the related art through the cooperation of the pressure signal tube and the two valves to realize the switching between the full capacity operation mode and the partial capacity operation mode of the compressor, the structure is simple, easy to assemble, low in cost, and suitable for popularization and application.

Further, on the one hand, the third port communicates with the exhaust chamber of the pump body; on the other hand, the third port communicates with the housing cavity of the housing. The different communication modes of the third port can meet the requirements of different structures and The pump body has a wide range of requirements for different structures and different structures of the casing.

According to the above-mentioned compressor of this application, it may also have the following additional technical features:

In the above technical solution, further, the valve assembly includes: a valve, the valve is provided with at least a first port, a second port, and a third port; a first sealing tube, one end of the first sealing tube communicates with the first port; Two sealed tubes, one end of the second sealed tube communicates with the second port; the pump body is provided with a first sealed hole and a second sealed hole, the first sealed hole communicates with the variable volume chamber, and the second sealed hole communicates with the suction The chamber is in communication; the housing is provided with a first through hole and a second through hole, the first through hole is arranged corresponding to the first sealing hole, and the second through hole is arranged corresponding to the second sealing hole; wherein the first sealing tube The other end passes through the first through hole to communicate with the first sealing hole, and the other end of the second sealing tube passes through the second through hole to communicate with the second sealing hole.

In this technical solution, the valve assembly includes a valve, a first sealing tube, and a second sealing tube. The valve is provided with at least a first port, a second port, and a third port, that is, the first port, the second port, The communication state of the third port is used to adjust the pressure state of the variable volume chamber. The structure is simple and easy to implement, simplifies the number of control valves, and helps reduce control costs.

The pump body is provided with a first sealing hole and a second sealing hole. The first sealing hole is in communication with the variable volume chamber, the second sealing hole is in communication with the suction chamber, and the housing is provided at a position corresponding to the first sealing hole. The first through hole, the housing is provided with a second through hole at a position corresponding to the second sealing hole, one end of the first sealing tube is connected to the first port, and the other end passes through the first through hole to connect to the first sealing hole , The first port of the valve can be sealed to communicate with the variable volume chamber of the pump body, one end of the second sealing tube is connected with the second port, and the other end passes through the second through hole to connect with the second sealing hole, which can realize The second port of the valve is in sealed communication with the suction chamber of the pump body.

Further, the valve is provided with at least a first port, a second port and a third port, that is, the valve may also be provided with a fourth port or other ports, that is, the valve may be a three-way valve, a four-way valve or other valves that meet the requirements, The scope of application is wide. Specifically, when the valve is a four-way valve, the three ports of the four-way valve are correspondingly set as the first port, the second port, and the third port, and the other port is closed, that is, only three of the four-way valves are used. port.

In the above technical solution, further, the valve assembly further includes: a third sealing tube, one end of the third sealing tube is communicated with the third port; based on the third port communicating with the exhaust chamber, the pump body is also provided with The third sealing hole communicating with the exhaust chamber, the housing is provided with a third through hole corresponding to the third sealing hole, and the other end of the third sealing tube passes through the third through hole to connect with the third sealing hole; Or based on the third port communicating with the containing cavity, the housing is provided with a third through hole communicating with the containing cavity, and the other end of the third sealing tube is communicating with the third through hole.

In this technical solution, the valve assembly further includes a third sealing tube. On the one hand, based on the third port communicating with the exhaust chamber, the pump body is provided with a third sealing hole communicating with the exhaust chamber, and the housing is provided with There is a third through hole corresponding to the third sealing hole. One end of the third sealing tube is connected to the third port, and the other end passes through the third through hole to connect with the third sealing hole, so that the third port of the valve can be connected to the pump. The exhaust chamber of the body is in sealed communication.

On the other hand, based on the third port communicating with the accommodating cavity, the housing is provided with a third through hole communicating with the accommodating cavity, one end of the third sealing tube is communicated with the third port, and the other end is communicated with the third through hole , Thereby achieving sealed communication between the third port of the valve and the housing cavity of the housing.

In the above technical solution, further, the valve assembly further includes: a conduit sleeved on the outside of any one of the first sealed tube, the second sealed tube, and the third sealed tube, and the housing and the first sealed tube , Any one of the second sealing tube and the third sealing tube is connected.

In this technical solution, the tube is sheathed outside any one of the first, second, and third sealed tubes, and the housing is sealed with the first, second, and third sealed tubes. The pipe connection can ensure the reliability and tightness of the connection between the valve assembly and the casing and the pump body.

Further, the conduit includes a first conduit, a second conduit, and a third conduit. The first conduit is sheathed on the outside of the first sealed tube, the inside of the first conduit is welded to the first sealed tube, and the outside of the first conduit is connected to the first sealed tube. The housing at the through hole is welded, thereby ensuring the reliability and tightness of the connection between the first conduit, the first through hole and the first sealing tube. The second pipe is sleeved on the outside of the second sealing pipe, the inside of the second pipe is welded to the second sealing pipe, and the outside of the second pipe is welded to the shell at the second through hole, so as to ensure that the second pipe and the second pipe are welded together. The reliability and tightness of the connection between the through hole and the second sealing tube. The third pipe is sleeved on the outside of the third sealing pipe, the inside of the third pipe is welded to the third sealing pipe, and the outside of the third pipe is welded to the shell at the third through hole, thereby ensuring that the third pipe and the third pipe Reliability and tightness of the connection between the through hole and the third sealing tube.

In the above technical solution, further, the first sealing tube includes a body, the body is configured as a cavity with an opening at one end, a connection port communicating with the cavity is provided on the body, and the opening is configured to be connected with the first sealing hole The valve includes a valve body and a connecting pipe, the valve body is provided with a first port, a second port, and a third port, one end of the connecting pipe is connected to the connecting port, and the other end is configured to communicate with the first port; wherein, The structure of the second sealed tube, the third sealed tube and the first sealed tube are the same or different.

In this technical solution, the first sealing tube includes a body. The body is configured as a cavity with an opening at one end. The body is provided with a connection port communicating with the cavity. Port, second port, and third port, wherein the opening of the first sealing tube is connected to the first sealing hole, and the connecting port of the first sealing tube is connected to the first port through the connecting tube, thereby realizing the first port and the first port A sealed hole communicates with each other.

Further, on the one hand, the second sealing tube and the third sealing tube have the same structure as the first sealing tube, which is conducive to mass production, improving the standardization rate of products, and reducing manufacturing costs; on the other hand, the second sealing tube and the third sealing tube have the same structure as the first sealing tube. The structure of the sealing tube is different from that of the first sealing tube, that is, the second sealing tube and the third sealing tube can have other structures that meet the requirements, which is beneficial to expand the scope of application of the product.

In the above technical solution, further, the first sealing hole and the second sealing hole are tapered holes; the end of the first sealing tube away from the first port is a cone structure; the end of the second sealing tube away from the second port is a cone体结构。 Body structure.

In this technical solution, the first sealing hole and the second sealing hole are tapered holes, and the end of the first sealing tube away from the first port is a cone structure, that is, the end of the first sealing tube close to the opening is a tapered tube. The end of the second sealing tube away from the second port is a cone structure, that is, the end of the second sealing tube close to the opening is a tapered tube. On the one hand, when one end of the vertebral body structure of the first sealing tube is inserted into the first sealing hole, the conical surface of the cone-shaped hole of the first sealing hole and the conical outer wall of the first sealing tube forms a sealing surface. , Plays a good sealing effect, and effectively ensures the sealing performance of the connection between the first sealing hole and the first sealing tube. On the other hand, when one end of the vertebral body structure of the second sealing tube is inserted into the second sealing hole, the conical surface of the taper hole of the second sealing hole and the outer wall of the second sealing tube forms a seal. The surface has a good sealing effect, thereby effectively ensuring the sealing performance of the connection between the second sealing hole and the second sealing tube, and improving the reliability of the product.

In the above technical solution, further, the valve further includes: a valve seat, which is arranged outside the housing and connected to the housing, the valve body is connected to the valve seat; the valve stem is connected to the valve body; the valve assembly is also It includes a control element connected with the valve stem, and the control element is configured to drive the valve stem to switch the communication state of the first port, the second port, and the third port.

In this technical solution, the valve further includes a valve seat and a valve stem, and the valve assembly further includes a control member. Are connected to each other, so that the valve body can be reliably and stably installed on the housing, and the reliability of the product is improved. The valve stem is connected with the valve body, and the control piece is connected with the valve stem. The valve stem is driven by the control piece to switch the communication state of the first port, the second port and the third port to adjust the pressure state of the variable volume chamber, and control The method is simple, the control cost is low, and the structure is simple and easy to realize, which simplifies the structure of the compressor and makes the appearance of the compressor simple.

In the above technical solution, further, the control mode of the control element is at least one of the following: mechanical control, pneumatic control, and electric control.

In this technical solution, the control mode of the control element is one of mechanical control, pneumatic control, and electric control. The different control modes of the control element can meet the requirements of different structures and types of valves, and have a wide range of applications.

In the above technical solution, it further includes: a cover body arranged outside the housing, and at least part of the valve assembly is arranged inside the cover body.

In this technical solution, a cover is provided on the outside of the housing, and at least part of the valve assembly is provided inside the cover. The cover has a good protective effect on the valve assembly and can prevent the valve assembly from being exposed to the outside and being easily exposed to other components. Damage to reduce the service life of the valve assembly, thereby helping to improve the reliability of the product and reduce the cost of use.

Further, according to the specific structure of the valve assembly and the specific structure of the cover body, all valve assemblies can be arranged inside the cover body, or some valve assemblies can be arranged inside the cover body (such as key components in the valve assembly). Extend the service life of valve components, improve product reliability, meet the needs of different structures of valve components and cover components, and expand the use range of products. Specifically, the cover body is provided with a communication port for other components to be connected to the valve assembly through the communication hole.

According to a second aspect of the present application, there is provided an operation control method of a compressor, which is used for the compressor of any of the above technical solutions. The operation control method of the compressor includes: obtaining an operation mode command of the compressor; , The control valve assembly switches the communication state of the first port, the second port and the third port.

The compressor operation control method provided in the present application is used for the compressor of any one of the above technical solutions. The compressor control method includes obtaining an operation mode command of the compressor, and controlling the valve assembly to switch the first port and the second port according to the operation mode command. The communication state of the second port and the third port can adjust the pressure state of the variable volume chamber, and then can realize the compressor full capacity operation mode or partial capacity operation mode, so that when the refrigeration load is large, the compressor operates in full capacity mode Work; when the refrigeration load is small, the compressor works in partial capacity operation mode, which can avoid the frequent start and stop of the compressor and the reduction of partial capacity efficiency in the fixed-speed air conditioning system in the partial capacity operation mode, making it possible to have a variable capacity compressor The cooling season energy efficiency ratio of the air-conditioning system is much higher than that of the fixed-speed air-conditioning system.

In the above technical solution, further, the operation mode instruction includes a first operation mode instruction and a second operation mode instruction. According to the operation mode instruction, the control valve assembly switches the communication state of the first port, the second port, and the third port. , Specifically including: according to the first operating mode instruction, the first port and the second port of the control valve assembly are connected, the third port is disconnected from the first port, and the third port is disconnected from the second port; according to the second operating mode instruction , The first port and the third port of the control valve assembly are connected, the second port is disconnected from the first port, and the second port is disconnected from the third port.

In this technical solution, a specific control solution for switching the communication states of the first port, the second port, and the third port according to the operating mode instruction control valve assembly is defined. The operation mode commands include the first operation mode command and the second operation mode command. When the compressor is running, the inside of the compressor housing (ie, the housing cavity) is filled with high-pressure gas, and the pump body performs a suction action, and the suction chamber of the pump body The chamber is in a low-pressure state, and the exhaust chamber of the pump body is also filled with high-pressure gas. Therefore, the third port connected with the containing chamber or the exhaust chamber is in a high-pressure state, and the second port connected with the suction chamber is in a high-pressure state. Low pressure state. On the one hand, when the first operating mode instruction is obtained, according to the first operating mode instruction, the first port and the second port of the control valve assembly are connected, the third port is disconnected from the first port, and the third port is connected to the second port. Disconnected, at this time, the pressure at the first port and the pressure at the second port are the same, that is, the pressure in the variable volume chamber is the same as the pressure in the suction chamber, and both are in a low pressure state, so the pump body is in a partial volume compression state , The compressor works in partial capacity operation mode.

On the other hand, when the second operating mode instruction is obtained, the first port and the third port of the control valve assembly are connected according to the second operating mode instruction, the second port is disconnected from the first port, and the second port is connected to the third port. The port is disconnected. At this time, the pressure at the first port and the pressure at the third port are the same, that is, the pressure in the variable volume chamber is the same as the pressure in the accommodating chamber, and both are in a high-pressure state, so the pump body is in a full-volume compression state , The compressor works in full capacity operation mode.

In the above technical solution, further, the first operation mode command is a compressor partial capacity operation mode command; the second operation mode command is a compressor full capacity operation mode command.

In this technical solution, the first operating mode command is a compressor partial capacity operating mode command, and the second operating mode command is a compressor full capacity operating mode command. Specifically, when the refrigeration load is large, the compressor works in full capacity operation mode, which helps to ensure a good refrigeration effect; when the refrigeration load is small, the compressor is controlled to work in partial capacity operation mode, which can prevent the fixed-speed air conditioning system from working In the partial capacity operation mode, the compressor frequently starts and stops and the partial capacity efficiency is reduced, which in turn improves the cooling season energy efficiency ratio of the air conditioning system.

According to a third aspect of the present application, there is provided a refrigeration equipment, including: a heat exchanger; and the compressor of any one of the above technical solutions, the heat exchanger is connected to the compressor.

The refrigeration equipment provided in this application includes a heat exchanger and a compressor of any of the above technical solutions. The heat exchanger and the compressor are connected to provide a heat exchange system for the refrigeration equipment. Since the refrigeration equipment includes the compressor of any of the above technical solutions, it has all the beneficial effects of the above compressor, which will not be repeated here.

Specifically, the refrigeration equipment is an air conditioner.

The additional aspects and advantages of the present application will become apparent in the following description, or be understood through the practice of the present application.

Description of the drawings

The above and/or additional aspects and advantages of the present application will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, in which:

Fig. 1 shows a schematic structural diagram from a first perspective of the compressor of the first embodiment of the present application;

Fig. 2 shows a schematic structural diagram from a second perspective of the compressor of the embodiment shown in Fig. 1;

Fig. 3 shows a schematic structural diagram of part of the compressor of the embodiment shown in Fig. 2;

Figure 4 shows a schematic structural diagram of a valve assembly according to an embodiment of the present application;

Figure 5 shows a schematic structural view of the valve in the embodiment shown in Figure 4;

Figure 6 shows a schematic structural diagram of a pump body according to an embodiment of the present application;

Fig. 7 shows a schematic structural diagram of a first sealing tube according to an embodiment of the present application;

FIG. 8 shows a schematic structural diagram of the embodiment shown in FIG. 7 from a first perspective;

Fig. 9 shows a cross-sectional view at A-A of the embodiment shown in Fig. 8;

Figure 10 shows a schematic structural diagram of a compressor according to a second embodiment of the present application;

FIG. 11 shows a schematic flowchart of the operation control method of the compressor according to the first embodiment of the present application;

Fig. 12 shows a schematic flow chart of a compressor operation control method according to a second embodiment of the present application.

Among them, the corresponding relationship between the reference signs and component names in Figures 1 to 10 is:

100 compressor, 110 housing, 112 exhaust port, 114 first through hole, 116 second through hole, 118 third through hole, 120 pump body, 122 first sealing hole, 124 second sealing hole, 130 liquid storage Device, 132 suction port, 140 cover, 200 valve assembly, 210 valve, 211 valve body, 212 first connecting pipe, 213 second connecting pipe, 214 third connecting pipe, 215 valve seat, 216 valve stem, 221 A sealed tube, 222 second sealed tube, 223 third sealed tube, 224 body, 225 opening, 226 connection port, 227 cone structure, 232 first tube, 234 second tube, 236 third tube, 240 control element.

Detailed ways

In order to be able to understand the above objectives, features and advantages of the application more clearly, the application will be further described in detail below with reference to the accompanying drawings and specific implementations. It should be noted that the embodiments of the application and the features in the embodiments can be combined with each other if there is no conflict.

In the following description, many specific details are set forth in order to fully understand this application. However, this application can also be implemented in other ways different from those described here. Therefore, the scope of protection of this application is not covered by the specific details disclosed below. Limitations of the embodiment.

Hereinafter, the compressor 100, the operation control method of the compressor, and the refrigeration equipment according to some embodiments of the present application will be described with reference to FIGS. 1 to 12.

Example 1:

As shown in FIGS. 1 to 10, the embodiment of the present application proposes a compressor 100, which includes: a casing 110, a pump body 120, a reservoir 130, and a valve assembly 200. The casing 110 is configured to have an exhaust gas. The accommodating cavity (not shown) of the port 112; the pump body 120 is arranged in the accommodating cavity, and the pump body 120 includes a connected suction chamber (not shown), a variable volume chamber (not shown), and an exhaust chamber Chamber (not shown), the exhaust chamber communicates with the containing chamber; the reservoir 130 is arranged outside the housing 110 and communicates with the suction chamber; the valve assembly 200 is arranged outside the housing 110, The valve assembly 200 includes at least a first port (not shown), a second port (not shown), and a third port (not shown). The first port is connected to the variable volume chamber, and the second port is connected to the suction The chamber is in communication, and the third port is in communication with the exhaust chamber or the accommodating chamber; wherein, the valve assembly 200 is configured to be adapted to switch the communication state of the first port, the second port, and the third port.

Specifically, as shown in Figures 1 and 2, the housing 110 is a containing cavity with an exhaust port 112, the reservoir 130 is provided on the outside of the housing 110 and is provided with a suction port 132, and the pump body 120 is provided in the housing. Inside the cavity, the pump body 120 includes a connected suction chamber, a variable volume chamber, and an exhaust chamber. The suction chamber communicates with the reservoir 130, and the exhaust chamber communicates with the containing chamber. The low-pressure gas is sucked into the accumulator 130 through the suction port 132 of the accumulator 130, enters the pump body 120 inside the compressor 100, is compressed into high-pressure gas by the pump body 120, and is discharged from the housing through the exhaust port 112 through the containing chamber. 110. The passage valve assembly 200 is provided with a first port communicating with the variable volume chamber, a second port communicating with the suction chamber, and a third port communicating with the exhaust chamber or the accommodating cavity, so that the passage of the valve assembly 200 Switching the communication state of the first port, the second port, and the third port can adjust the pressure state of the variable-capacity chamber, thereby realizing the full-capacity operation mode or the partial-capacity operation mode of the compressor 100, so that when the refrigeration load is large, Compressor 100 works in full capacity operation mode; when the refrigeration load is small, compressor 100 works in partial capacity operation mode, which can avoid frequent compressor start and stop and partial capacity efficiency reduction in fixed speed air conditioning system in partial capacity operation mode The problem makes the cooling season energy efficiency ratio of the air conditioning system with the variable capacity compressor 100 much higher than that of the fixed speed air conditioning system. Compared with the related art through the cooperation of the pressure signal tube and the two valves to realize the switching between the full capacity operation mode and the partial capacity operation mode of the compressor, the structure is simple, easy to assemble, low in cost, and suitable for popularization and application.

Further, on the one hand, the third port communicates with the exhaust chamber of the pump body 120; on the other hand, the third port communicates with the accommodating cavity of the housing 110. The different communication modes of the third port can meet the requirements of the valve assembly 200. Different structures, different structures of the pump body 120, and different structures of the casing 110 require a wide range of applications.

Specifically, the suction chamber of the pump body 120 is a low pressure chamber, and the exhaust chamber is a high pressure chamber. The pump body 120 is provided with a suction hole communicating with the suction chamber, and the first port can directly pass through the pipeline It is connected to the suction chamber, or the first port is connected to the suction hole through a pipeline. The different connection modes of the first port can meet the requirements of different structures of the pump body 120 and have a wide range of applications.

Further, when the third port is in communication with the accommodating cavity of the compressor 100, since the compressor 100 is running, the inside of the housing 110 (ie, the accommodating cavity) of the compressor 100 is filled with high-pressure gas. The third port is in a high pressure state. Since the pump body 120 performs a suction action when the compressor 100 is running, the suction chamber of the pump body 120 is in a low pressure state, so that the second port communicating with the suction chamber is in a low pressure state. On the one hand, when the valve assembly 200 is switched to communicate with the first port and the second port, the third port is disconnected from the first port, and the third port is disconnected from the second port. At this time, the pressure at the first port and the second port are disconnected. The pressures at the two ports are the same, that is, the pressure in the variable volume chamber is the same as the pressure in the suction chamber, and both are in a low pressure state. Therefore, the pump body 120 is in a partial capacity compression state, and the compressor 100 works in a partial capacity operation mode. On the other hand, when the valve assembly 200 is switched to communicate with the first port and the third port, the second port is disconnected from the first port, and the second port is disconnected from the third port. At this time, the pressure at the first port and The pressure at the third port is the same, that is, the pressure in the variable volume chamber is the same as the pressure in the accommodating chamber, and both are in a high-pressure state. Therefore, the pump body 120 is in a full-capacity compression state, and the compressor 100 works in a full-capacity operation mode.

This application integrates the pressure signal tube and two valves in the related art into the valve assembly 200, and the communication state of the first port, the second port, and the third port can be switched through the valve assembly 200 to realize the full capacity operation of the compressor 100 The switching between the mode and the partial capacity operation mode simplifies the structure of the compressor 100, improves the degree of integration of the compressor 100, and has a lower cost, is convenient for assembly, and is suitable for popularization and application.

Further, the pump body 120 is also provided with a variable volume channel communicating with the variable volume chamber. For the variable volume compressor 100 that adopts the sliding vane variable volume method, the variable volume channel communicates with the sliding vane cavity on the back of the sliding vane. In the variable-capacity compressor 100 adopting the variable-capacity plunger method, the variable-capacity passage is communicated with the plunger cavity.

Example 2:

As shown in Figures 1 to 10, in an embodiment of the present application, the compressor 100 includes: a housing 110, a pump body 120, a reservoir 130, and a valve assembly 200. The valve assembly 200 includes a valve 210 and a first sealing tube. 221 and the second sealing pipe 222, wherein the valve 210 is provided with at least a first port, a second port and a third port; one end of the first sealing pipe 221 is connected to the first port; one end of the second sealing pipe 222 is connected to the first port The two ports are connected; the pump body 120 is provided with a first sealing hole 122 and a second sealing hole 124, the first sealing hole 122 is in communication with the variable volume chamber, and the second sealing hole 124 is in communication with the suction chamber; the housing 110 is provided with a first through hole 114 and a second through hole 116, the first through hole 114 is arranged corresponding to the first sealing hole 122, and the second through hole 116 is arranged corresponding to the second sealing hole 124; wherein, the first sealing tube 221 The other end of the second sealing tube 222 passes through the first through hole 114 to communicate with the first sealing hole 122, and the other end of the second sealing tube 222 passes through the second through hole 116 to communicate with the second sealing hole 124.

In this embodiment, as shown in FIG. 4, the valve assembly 200 includes a valve 210, a first sealing tube 221, and a second sealing tube 222. The valve 210 is provided with at least a first port, a second port, and a third port. Switching the communication states of the first port, the second port, and the third port of the valve 210 to adjust the pressure state of the variable volume chamber has a simple structure and is easy to implement, simplifies the number of control valves 210, and helps reduce control costs.

As shown in Figure 6, the pump body 120 is provided with a first sealing hole 122 and a second sealing hole 124, the first sealing hole 122 is connected to the variable volume chamber, and the second sealing hole 124 is connected to the suction chamber, such as As shown in FIG. 3, the housing 110 is provided with a first through hole 114 at a position corresponding to the first sealing hole 122, the housing 110 is provided with a second through hole 116 at a position corresponding to the second sealing hole 124, and the first sealing tube 221 One end of the valve is connected to the first port, and the other end passes through the first through hole 114 to connect to the first sealing hole 122, which can realize the sealed communication between the first port of the valve 210 and the variable volume chamber of the pump body 120, and the second seal One end of the tube 222 is connected to the second port, and the other end passes through the second through hole 116 to connect to the second sealing hole 124, so that the second port of the valve 210 can be sealed to communicate with the suction chamber of the pump body 120.

Further, the valve 210 is provided with at least a first port, a second port, and a third port. That is, the valve 210 may also be provided with a fourth port or other ports. That is, the valve 210 may be a three-way valve, a four-way valve, or those that meet the requirements. Other valves have a wide range of applications. Specifically, when the valve 210 is a four-way valve, the three ports of the four-way valve are correspondingly set as the first port, the second port, and the third port, and the other port is closed, that is, only three ports of the four-way valve are used. Ports.

Further, as shown in FIGS. 3 and 4, the valve assembly 200 further includes a third sealing tube 223, one end of the third sealing tube 223 is connected to the third port; based on the third port being connected to the exhaust chamber, the pump The body 120 is also provided with a third sealing hole communicating with the exhaust chamber, the housing 110 is provided with a third through hole 118 corresponding to the third sealing hole, and the other end of the third sealing tube 223 passes through the third through hole. The hole 118 is connected with the third sealing hole; or based on the third port communicating with the containing cavity, the housing 110 is provided with a third through hole 118 communicating with the containing cavity, and the other end of the third sealing tube 223 is connected with the third communicating hole. The holes 118 communicate with each other.

Specifically, the valve assembly 200 further includes a third sealing tube 223. On the one hand, based on the third port communicating with the exhaust chamber, the pump body 120 is provided with a third sealing hole communicating with the exhaust chamber, and the housing 110 A third through hole 118 corresponding to the third sealing hole is provided. One end of the third sealing tube 223 is connected to the third port, and the other end passes through the third through hole 118 to connect to the third sealing hole, which can realize the valve 210 The third port is in sealed communication with the exhaust chamber of the pump body 120.

On the other hand, as shown in Figures 2 and 3, the housing 110 is provided with a third through hole 118 communicating with the accommodating cavity based on the third port communicating with the accommodating cavity, and one end of the third sealing tube 223 is connected to the third The port is in communication, and the other end is in communication with the third through hole 118, so that the third port of the valve 210 is in sealed communication with the accommodating cavity of the housing 110.

Specifically, the first port, the second port, and the third port of the valve 210 can be connected to the variable volume chamber and the suction chamber of the pump body 120 through the first sealed tube 221, the second sealed tube 222, and the third sealed tube 223, respectively. The chamber, the exhaust chamber, or the accommodating cavity of the housing 110 are hermetically connected, so that the connecting pipeline is simple and easy to assemble, and at the same time, it is beneficial to simplify the structure of the compressor 100 and reduce the manufacturing cost.

Example 3:

As shown in FIGS. 1 to 10, the compressor 100 provided by an embodiment of the present application is based on the above-mentioned embodiment 2, and further, the valve assembly 200 further includes: a conduit, which is sleeved on the first sealing tube 221 , The outside of any one of the second sealing pipe 222 and the third sealing pipe 223, and connecting the housing 110 and any one of the first sealing pipe 221, the second sealing pipe 222, and the third sealing pipe 223.

In this embodiment, a catheter is sheathed outside of any one of the first sealing tube 221, the second sealing tube 222, and the third sealing tube 223, and the housing 110 is sealed with the first sealing tube 221 and the second sealing tube 223. The pipe 222 and the third sealing pipe 223 are connected, thereby ensuring the reliability and tightness of the connection between the valve assembly 200 and the housing 110 and the pump body 120.

Further, as shown in FIG. 4, the catheter includes a first catheter 232, a second catheter 234, and a third catheter 236. The first catheter 232 is sleeved on the outside of the first sealed tube 221. The sealing pipe 221 is welded, and the outside of the first pipe 232 is welded to the housing 110 at the first through hole 114, thereby ensuring the reliability and tightness of the connection between the first pipe 232 and the first through hole 114 and the first sealing pipe 221 . The second pipe 234 is sleeved on the outside of the second sealing pipe 222, the inside of the second pipe 234 is welded to the second sealing pipe 222, and the outside of the second pipe 234 is welded to the housing 110 at the second through hole 116, thereby enabling The reliability and tightness of the connection between the second conduit 234 and the second through hole 116 and the second sealing tube 222 are ensured. The third pipe 236 is sleeved on the outside of the third sealing pipe 223, the inside of the third pipe 236 is welded to the third sealing pipe 223, and the outside of the third pipe 236 is welded to the housing 110 at the third through hole 118, thereby enabling The reliability and tightness of the connection of the third conduit 236 with the third through hole 118 and the third sealing tube 223 are ensured.

Example 4:

As shown in Figures 1 to 10, the compressor 100 provided by an embodiment of the present application, on the basis of the above-mentioned embodiment 2 or embodiment 3, further, the first sealing tube 221 includes a body 224, and the body 224 is configured It is a cavity with an opening 225 at one end. The body 224 is provided with a connection port 226 communicating with the cavity. The opening 225 is configured to communicate with the first sealing hole 122; the valve 210 includes a valve body 211 and a connecting pipe. 211 is provided with a first port, a second port, and a third port. One end of the connecting pipe is connected to the connecting port 226, and the other end is configured to communicate with the first port; wherein, the second sealing pipe 222 and the third sealing pipe The structure of 223 is the same as or different from that of the first sealing tube 221.

In this embodiment, as shown in Figures 7, 8 and 9, the first sealing tube 221 includes a body 224, the body 224 is configured as a cavity with an opening 225 at one end, and the body 224 is provided with a cavity communicating with the cavity. The connecting port 226, as shown in FIG. 5, the valve 210 includes a valve body 211 and a connecting pipe. The valve body 211 is provided with a first port, a second port, and a third port. The sealing hole 122 is connected, and the connecting port 226 of the first sealing tube 221 communicates with the first port through the connecting tube, so as to realize the communication between the first port and the first sealing hole 122.

Further, on the one hand, the second sealing tube 222 and the third sealing tube 223 have the same structure as the first sealing tube 221, which is conducive to mass production, improving the standardization rate of products, and reducing manufacturing costs; on the other hand, the second sealing tube The structures of the 222 and the third sealing tube 223 are different from those of the first sealing tube 221, that is, the second sealing tube 222 and the third sealing tube 223 may have other structures that meet the requirements, which is beneficial to expand the scope of application of the product.

Specifically, the second sealing tube 222 and the third sealing tube 223 have the same structure as the first sealing tube 221, and the connecting tube includes a first connecting tube 212, a second connecting tube 213, and a third connecting tube 214. The first connecting tube 212 One end is connected to the first port, and the other end is connected to the connection port 226 of the first sealing tube 221. The opening 225 of the second sealing pipe 222 is connected to the second sealing hole 124, and the connecting port 226 of the second sealing pipe 222 is connected to the second port through the second connecting pipe 213, thereby realizing the second port and the second sealing hole 124 Connected.

Since the third port is connected to the exhaust chamber, the opening 225 of the third sealing pipe 223 is connected to the third sealing hole, and the connecting port 226 of the third sealing pipe 223 is connected to the third port through the third connecting pipe 214, In turn, the third port is communicated with the third sealing hole.

Since the third port is connected to the accommodating cavity, the opening 225 of the third sealing tube 223 is connected to the third through hole 118, and the connecting port 226 of the third sealing tube 223 is connected to the third port through the third connecting tube 214, and then The communication between the third port and the containing cavity is realized.

Specifically, the first sealing hole 122 and the second sealing hole 124 are tapered holes, and the end of the first sealing tube 221 away from the first port is a cone structure 227, that is, the end of the first sealing tube 221 close to the opening 225 is tapered. Tube, the end of the second sealing tube 222 away from the second port is a cone structure 227, that is, the end of the second sealing tube 222 close to the opening 225 is a tapered tube. On the one hand, when one end of the cone structure 227 of the first sealing tube 221 is inserted into the first sealing hole 122, the tapered inner wall of the first sealing hole 122 and the tapered outer wall of the first sealing tube 221 are in contact with each other. The surface forms a sealing surface, which has a good sealing effect, thereby effectively ensuring the sealing performance of the connection between the first sealing hole 122 and the first sealing tube 221. On the other hand, when one end of the cone structure 227 of the second sealing tube 222 is inserted into the second sealing hole 124, the inner wall of the second sealing hole 124 is in contact with the outer wall of the second sealing tube 222. The shaped surface forms a sealing surface, which has a good sealing effect, thereby effectively ensuring the sealing performance of the connection between the second sealing hole 124 and the second sealing tube 222, and improving the reliability of the product.

Example 5:

As shown in Figures 1 to 10, the compressor 100 provided by an embodiment of the present application is based on any one of the above-mentioned embodiments 2 to 4, and further, the valve 210 further includes: a valve seat 215 , Set outside the housing 110 and connected to the housing 110, the valve body 211 is connected to the valve seat 215; the valve stem 216 is connected to the valve body 211; the valve assembly 200 also includes a control member 240, which is connected to the valve stem 216 is connected, and the control member 240 is configured to drive the valve stem 216 to switch the communication state of the first port, the second port, and the third port.

In this embodiment, as shown in Figure 1, Figure 2 and Figure 5, the valve 210 further includes a valve seat 215, a valve stem 216, the valve assembly 200 further includes a control member 240, and the valve body 211 is arranged on the valve seat 215 and connected with The valve seat 215 is connected, and the valve seat 215 is arranged outside the housing 110 and connected to the housing 110, so that the valve body 211 can be reliably and stably installed on the housing 110, which improves the reliability of the product. The valve stem 216 is connected to the valve body 211, the control member 240 is connected to the valve stem 216, and the valve stem 216 is driven to move through the control member 240 to switch the communication state of the first port, the second port and the third port to adjust the variable volume chamber The pressure state of the chamber, the control method is simple, the control cost is low, and the structure is simple and easy to implement, which simplifies the structure of the compressor 100 and makes the appearance of the compressor 100 simple.

Specifically, the valve seat 215 is welded to the outside of the housing 110.

Further, the control method of the control element 240 is one of mechanical control, pneumatic control, and electric control. The different control methods of the control element 240 can meet the requirements of different structures and different types of the valve 210, and have a wide range of applications. Further, the valve 210 is any one of a mechanical three-way valve, a pilot-operated three-way valve, a pilot-operated four-way valve, a pneumatic three-way valve, and an electric three-way valve. The different forms of the valve 210 are conducive to expanding the use of products. Scope.

Specifically, the valve 210 is a pilot-type three-way solenoid valve, and the control element 240 is an electromagnetic coil. At this time, the control element 240 has two control states: the coil is not energized and the coil is energized. For example: when the solenoid coil is not energized, the valve 210 is in the first communication state. At this time, the first port and the second port of the valve body 211 are connected, and the third port and the first port of the valve body 211 are disconnected. The port and the second port are disconnected; when the solenoid coil is energized, the valve 210 is in the second communication state. At this time, the first port and the third port of the valve body 211 are connected, and the second port and the first port are disconnected, The second port and the third port are disconnected. It can be understood that when the solenoid coil is energized, the valve 210 can be configured to be in the first communicating state, and when the solenoid coil is not energized, the valve 210 can be configured to be in the second communicating state.

Example 6:

As shown in Figures 1 to 10, on the basis of any one of the above-mentioned Embodiments 1 to 5, the compressor 100 further includes: a cover 140, which is disposed on the outside of the housing 110, at least partially The valve assembly 200 is provided inside the cover 140.

In this embodiment, as shown in FIG. 10, a cover 140 is provided on the outside of the housing 110, and at least part of the valve assembly 200 is provided inside the cover 140. The cover 140 has a good protective effect on the valve assembly 200. This can prevent the valve assembly 200 from being exposed to the outside and being easily damaged by other components, thereby reducing the service life of the valve assembly 200, thereby helping to improve the reliability of the product and reduce the use cost.

Further, according to the specific structure of the valve assembly 200 and the specific structure of the cover 140, all the valve assemblies 200 can be arranged inside the cover 140, or a part of the valve assemblies 200 can be arranged inside the cover 140 (such as the valve assembly 200). While extending the service life of the valve assembly 200 and improving product reliability, it also meets the needs of different structures of the valve assembly 200 and the cover 140 assembly, and expands the use range of the product. Specifically, the cover 140 is provided with a communication port for other components to be connected to the valve assembly 200 through the communication hole.

Example 7:

In an embodiment of the present application, a compressor operation control method is proposed, which is used for the compressor of any of the above embodiments. As shown in Figure 11, the operation control method of the compressor includes:

Step S302: Obtain the operating mode command of the compressor;

Step S304: According to the operation mode instruction, the control valve assembly switches the communication state of the first port, the second port, and the third port.

The compressor operation control method provided in the present application is used for the compressor of any one of the above technical solutions. The compressor control method includes obtaining an operation mode command of the compressor, and controlling the valve assembly to switch the first port and the second port according to the operation mode command. The communication state of the second port and the third port can adjust the pressure state of the variable volume chamber, and then can realize the compressor full capacity operation mode or partial capacity operation mode, so that when the refrigeration load is large, the compressor operates in full capacity mode Work; when the refrigeration load is small, the compressor works in partial capacity operation mode, which can avoid the frequent start and stop of the compressor and the reduction of partial capacity efficiency in the fixed-speed air conditioning system in the partial capacity operation mode, making it possible to have a variable capacity compressor The cooling season energy efficiency ratio of the air-conditioning system is much higher than that of the fixed-speed air-conditioning system.

Example 8:

In an embodiment of the present application, a method for controlling the operation of a compressor is proposed. As shown in Fig. 12, the operation control method of the compressor includes:

Step S402: Obtain the operating mode command of the compressor;

Step S404, according to the first operating mode instruction, the first port and the second port of the control valve assembly are connected, the third port is disconnected from the first port, and the third port is disconnected from the second port;

Step S406: According to the second operation mode instruction, the first port and the third port of the control valve assembly are connected, the second port is disconnected from the first port, and the second port is disconnected from the third port.

In this embodiment, a specific control scheme for switching the communication state of the first port, the second port, and the third port according to the operating mode instruction control valve assembly is defined. The operation mode commands include the first operation mode command and the second operation mode command. When the compressor is running, the inside of the compressor housing (ie, the housing cavity) is filled with high-pressure gas, and the pump body performs a suction action, and the suction chamber of the pump body The chamber is in a low-pressure state, and the exhaust chamber of the pump body is also filled with high-pressure gas. Therefore, the third port connected with the containing chamber or the exhaust chamber is in a high-pressure state, and the second port connected with the suction chamber is in a high-pressure state. Low pressure state.

On the one hand, when the first operating mode instruction is obtained, according to the first operating mode instruction, the first port and the second port of the control valve assembly are connected, the third port is disconnected from the first port, and the third port is connected to the second port. Disconnected, at this time, the pressure at the first port and the pressure at the second port are the same, that is, the pressure in the variable volume chamber is the same as the pressure in the suction chamber, and both are in a low pressure state, so the pump body is in a partial volume compression state , The compressor works in partial capacity operation mode.

On the other hand, when the second operating mode instruction is obtained, the first port and the third port of the control valve assembly are connected according to the second operating mode instruction, the second port is disconnected from the first port, and the second port is connected to the third port. The port is disconnected. At this time, the pressure at the first port and the pressure at the third port are the same, that is, the pressure in the variable volume chamber is the same as the pressure in the accommodating chamber, and both are in a high-pressure state, so the pump body is in a full-volume compression state , The compressor works in full capacity operation mode.

Specifically, the first operating mode command is a compressor partial capacity operating mode command, and the second operating mode command is a compressor full capacity operating mode command. Specifically, when the refrigeration load is large, the compressor works in full capacity operation mode, which helps to ensure a good refrigeration effect; when the refrigeration load is small, the compressor is controlled to work in partial capacity operation mode, which can prevent the fixed-speed air conditioning system from working In the partial capacity operation mode, the compressor frequently starts and stops and the partial capacity efficiency is reduced, which in turn improves the cooling season energy efficiency ratio of the air conditioning system.

Example 9:

As shown in FIGS. 1 to 10, in an embodiment of the present application, a refrigeration device is proposed, including a heat exchanger and the compressor 100 of any of the above embodiments, the heat exchanger is connected to the compressor 100 for cooling The equipment provides a heat exchange system. Since the refrigeration equipment includes the compressor 100 of any one of the above embodiments, it has all the beneficial effects of the above compressor 100, which will not be repeated here.

Specifically, the refrigeration equipment is an air conditioner.

In specific embodiments:

In the related art, the compressor used in the fixed-speed air-conditioning system operates at a fixed speed. When the indoor thermal load is less than the cooling capacity of the compressor, the compressor must be started and stopped continuously to maintain a substantially constant indoor temperature. The frequent start and stop of the compressor reduces the refrigeration efficiency of the refrigeration system at part of the capacity, and the annual energy efficiency drops.

The variable-capacity refrigeration compressor is a compressor with two or more compression chambers, typically a double-cylinder variable-capacity compressor. When the cooling load is large, the compressor runs at full capacity (two cylinders work at the same time); when the cooling load is small, the compressor runs at partial capacity (only one of the cylinders works, the other does not work). Another type of variable capacity compressor is a single-cylinder variable capacity compressor. The single-cylinder variable capacity compressor has only one cylinder, which can bypass part of the gas (this part of the gas cannot be compressed), when no gas is bypassed The cylinder runs at full capacity, and when part of the gas is bypassed, the cylinder runs at partial capacity. The air-conditioning system using variable capacity compressors can avoid the frequent compressor start and stop problems and the reduction of partial capacity efficiency that exist in the fixed-speed air-conditioning system at certain capacities. Its SEER (refrigeration season energy efficiency ratio) is much higher than that of the fixed-speed air-conditioning system. Although it is still lower than the inverter air-conditioning system, its cost is much lower than that of the inverter air-conditioning system. It can be said that the variable capacity compressor is a compromise solution that takes into account the low cost of the fixed speed compressor and the high efficiency of the variable frequency compressor, and is an important direction for the development of compressor technology in recent years.

Most of the existing variable-capacity compressors have their variable-capacity mechanisms to achieve capacity changes by means of changes in gas pressure. For example, for a common variable displacement compressor that uses a sliding vane or a plunger as an unloading device, when the cavity behind the sliding vane or plunger is connected to the high-pressure side of the air conditioning system, the entire volume of the compressor cylinder participates in gas compression At this time, the variable-capacity compressor is working at full capacity; when the cavity behind the sliding vane or plunger is connected to the low-pressure side of the air-conditioning system, only part of the capacity of the compressor cylinder participates in the compression. At this time, the variable-capacity compressor works at Partial capacity status. In order to achieve high pressure or low pressure to the back of the sliding vane or the plunger, it is necessary to install a pressure signal tube on the structure of the compressor. The pressure signal tube is led out from the inside of the compressor housing, and is divided by a three-way tube to connect to the air conditioner. The exhaust pipe and suction pipe of the system; and for the switching of high-pressure and low-pressure signals, two more valves are added to the two branches of the three-way pipe, and the two valves are combined to achieve sliding Switching of the pressure behind the sheet or plunger. Due to the existence of pressure signal pipes and valves, the structure of the compressor is not concise enough, the pipeline connection on the air conditioning system is complicated, and the cost of the control system is increased, so it is urgent to improve.

As shown in Figures 1 to 10, the compressor 100 provided by the present application includes a housing 110, a valve assembly 200, a reservoir 130, and a pump body 120. The housing 110 is provided with an exhaust port 112, and the reservoir 130 is provided with The suction port 132, the pump body 120 is arranged inside the casing 110, the low-pressure gas is sucked into the gas of the compressor 100 through the suction port 132, enters the pump body 120 inside the compressor 100 through the accumulator 130, and is compressed by the pump body 120 After becoming high-pressure gas, the compressor 100 is discharged from the exhaust port 112.

Further, the casing 110 of the compressor 100 is provided with a first through hole 114, a second through hole 116, and a third through hole 118. The valve assembly 200 includes a valve 210, a first sealing pipe 221, a second sealing pipe 222, a third sealing pipe 223, a first pipe 232, a second pipe 234, a third pipe 236, and a control member 240. Specifically, the valve 210 is a three-way valve. The three-way valve includes a first connecting pipe 212, a second connecting pipe 213, a third connecting pipe 214, a valve body 211, a valve seat 215, and a valve stem 216. The valve body 211 is provided with a One port, second port and third port. The pump body 120 is provided with a first sealing hole 122 and a second sealing hole 124. The first sealing hole 122 is connected to the variable volume channel inside the pump body 120, and the variable volume channel is further communicated with the variable volume chamber. Specifically, for the variable capacity compressor adopting the sliding vane variable capacity method, the variable capacity channel is connected to the sliding plate cavity on the back of the sliding plate; for the variable capacity compressor adopting the plunger variable capacity method, the variable capacity channel and the plunger cavity are connected. Connected. The second sealing hole 124 communicates with the suction chamber inside the pump body 120 or the suction hole of the pump body 120. The first sealing tube 221, the second sealing tube 222, and the third sealing tube 223 are of hollow structure, with an opening 225 at one end and a closed end at the other end, and a connecting port 226 is opened at the end close to the closure.

Specifically, the structure and installation relationship of each component are:

The first pipe 232, the second pipe 234, and the third pipe 236 are welded to the first through hole 114, the second through hole 116, and the third through hole 118 of the housing 110, respectively. After the pump body 120 is fixed in the housing 110, the first sealing hole 122 on the pump body 120 is aligned with the first through hole 114 on the housing 110, and the second sealing hole 124 on the pump body 120 is aligned with the housing 110上的二通孔116。 On the second through hole 116. The three-way valve is fixed on the casing 110 of the compressor 100 through the valve seat 215, and the control member 240 is fixed on the valve stem 216. The first connecting pipe 212, the second connecting pipe 213, and the third connecting pipe 214 of the three-way valve 210 are respectively connected to the connecting port 226 of the first sealing pipe 221, the connecting port 226 of the second sealing pipe 222, and the third sealing pipe 223 In the connection port 226, the connection method is welding.

The first sealing tube 221 and the second sealing tube 222 pass through the first duct 232 and the second duct 234 respectively, and are respectively inserted into the first sealing hole 122 and the second sealing hole 124 on the pump body 120. Specifically, the first sealing hole 122 and the second sealing hole 124 are tapered holes, the part connecting the first sealing tube 221 and the first sealing tube 221 is a tapered tube, and the second sealing tube 222 and the second sealing hole 124 are The connected part is a tapered tube. When the first sealing tube 221 is inserted into the first sealing hole 122 with a certain force, the tapered surface that contacts the inner wall of the first sealing hole 122 and the outer wall of the first sealing tube 221 forms a seal. Surface, which can play a sealing role. In the same way, the tapered surface in contact between the inner wall of the second dense hole and the outer wall of the second sealing tube 222 forms a sealing surface, which has a good sealing effect. Among them, the gap between the first sealing tube 221 and the first duct 232, and the gap between the second sealing tube 222 and the second duct 234 is sealed by welding. The third sealing tube 223 passes through the third duct 236, the third through hole 118, and communicates with the inner space (accommodating cavity) of the housing 110. It can be understood that, in some embodiments, the pump body 120 is provided with a third sealing hole communicating with the exhaust chamber, and the third sealing tube 223 may also pass through the third conduit 236, the third through hole 118 and The third sealing hole communicates with the exhaust chamber of the pump body 120. Wherein, the gap between the third sealing tube 223 and the third conduit 236 is sealed by welding.

The control member 240 has two control states: a first control state and a second control state. Correspondingly, the three-way valve in the valve assembly 200 has two communication states: in the first communication state, the first port is connected to the second port, and the third port is disconnected from the first port and the second port, that is, the first port is disconnected from the first port and the second port. A connecting tube 212 is connected to the second connecting tube 213, and the third connecting tube 214 is disconnected from the first connecting tube 212 and the second connecting tube 213; in the second connected state, the first port and the third port are connected, The second port is disconnected from the first port and the third port, that is, the first connecting tube 212 and the third connecting tube 214 are conducted, and the second connecting tube 213 is disconnected from the first connecting tube 212 and the third connecting tube 214.

When the control element 240 is in the first control state, the three-way valve in the valve assembly 200 is in the first communication state; when the control element 240 is in the second control state, the three-way valve in the valve assembly 200 is in the second communication state. Further, the three-way valve can be any form of three-way valve, such as a mechanical three-way valve, a pilot three-way valve, a pilot four-way valve (only three ports of the pilot four-way valve are used), Any one of pneumatic three-way valve and electric three-way valve.

Specifically, the three-way valve is a pilot solenoid valve, the control element 240 is an electromagnetic coil, and the control element 240 has two control states: the coil is not energized and the coil is energized. When the solenoid coil is not energized, the three-way valve is in the first communicating state; when the solenoid coil is energized, the three-way valve is in the second communicating state (or vice versa).

The pump body 120 can work in two working states: a full-volume compression state and a partial-volume compression state. When the first sealing hole 122 of the pump body 120 is subjected to high pressure, the pump body 120 works in a full capacity compression state; when the second sealing hole 124 of the pump body 120 is subjected to low pressure pressure, the pump body 120 works in a partial capacity compression state.

When the compressor 100 is running, the housing 110 of the compressor 100 is filled with high-pressure gas. At this time, the third through hole 118 of the housing 110 is high pressure, and the third sealing tube 223 is connected to the housing cavity of the housing 110 as For example, the high pressure is transmitted to the third port through the third sealing pipe 223 and the third connecting pipe 214, that is, when the compressor 100 is working, the third connecting pipe 214 is in a high pressure state.

When the compressor 100 is running, due to the suction action of the pump body 120, the suction chamber in the pump body 120 will be in a low pressure state. Since the second sealing hole 124 is connected to the suction chamber in the pump body 120, The insides of the second sealing pipe 222 that is in contact with the second sealing hole 124, the second connecting pipe 213 communicating with the second sealing pipe 222, and the second port communicating with the second connecting pipe 213 are all in a low pressure state .

When the compressor 100 is running, since the inside of the housing 110 is in a high-pressure state, the suction chamber of the pump body 120 is in a low-pressure state. At this time, by changing the state of the control member 240, the compressor 100 can be operated in a full-capacity mode and Switch between partial capacity operation modes. details as follows:

(1) Partial capacity operation mode

When the three-way valve in the valve assembly 200 is in the first communication state, the first port is connected to the second port, and the third port is disconnected from the first port and the second port, that is, the first connecting pipe 212 is connected to the second port. The tube 213 is connected, and the third connecting tube 214 is disconnected from the first connecting tube 212 and the second connecting tube 213. The pressure in the first connecting tube 212 will be the same as the pressure in the second connecting tube 213, that is, the first sealing hole The pressure in 122 is the same as the pressure in the suction chamber, that is, both are in a low pressure state. Therefore, the pump body 120 is in a partial capacity compression state, and the compressor 100 works in a partial capacity operation mode.

(2) Full capacity operation mode

When the three-way valve in the valve assembly 200 is in the second communication state, the first port and the third port are connected, and the second port is disconnected from the first port and the third port, that is, the first connecting pipe 212 is connected to the third port. The tube 214 is connected, and the second connecting tube 213 is disconnected from the first connecting tube 212 and the third connecting tube 214. Taking the third connecting tube 214 connected to the housing cavity of the housing 110 as an example, the inside of the first connecting tube 212 The pressure will be the same as the pressure in the third connecting pipe 214, that is, the pressure in the first sealing hole 122 is the same as the pressure in the housing 110, that is, both are in a high-pressure state. Therefore, the pump body 120 is in a full-capacity compression state, and the compressor 100 Work in full capacity operation mode.

The variable-capacity compressor 100 provided in the present application can be applied to both dual-cylinder variable-capacity compressors and single-cylinder variable-capacity compressors. The dual-cylinder and single-cylinder variable-capacity compressors in the related art require an external pressure signal tube to achieve capacity switching. In comparison, there is no need for additional connection of variable capacity pipelines, and the use of control elements is reduced, thereby improving the degree of structural integration of the compressor 100, making the compressor 100 more compact, lower cost, and more reliable in operation.

In this application, the term "plurality" refers to two or more than two, unless specifically defined otherwise. The terms "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be It is directly connected or indirectly connected through an intermediary. For those of ordinary skill in the art, the specific meanings of the above-mentioned terms in this application can be understood according to specific circumstances.

In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiments or examples are included in this application In at least one embodiment or example. In this specification, the schematic representations of the above-mentioned terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

The above descriptions are only preferred embodiments of the application, and are not intended to limit the application. For those skilled in the art, the application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included in the protection scope of this application.

Claims (13)

1. A compressor, which includes:

   A housing, the housing being configured as a receiving cavity with an exhaust port;

   The pump body is arranged in the containing cavity, and the pump body includes a connected suction chamber, a variable volume chamber, and an exhaust chamber, and the exhaust chamber is in communication with the containing cavity;

   The liquid reservoir is arranged on the outside of the housing and communicates with the suction chamber;

   The valve assembly is arranged on the outside of the housing. The valve assembly at least includes a first port, a second port, and a third port. The first port is in communication with the variable volume chamber, and the second The port is in communication with the suction chamber, and the third port is in communication with the exhaust chamber or the accommodating cavity;

   Wherein, the valve assembly is configured to be adapted to switch the communication state of the first port, the second port, and the third port.
2. The compressor of claim 1, wherein the valve assembly includes:

   A valve, the valve is provided with at least the first port, the second port, and the third port;

   A first sealing tube, one end of the first sealing tube is communicated with the first port;

   A second sealing tube, one end of the second sealing tube communicates with the second port;

   The pump body is provided with a first sealing hole and a second sealing hole, the first sealing hole is in communication with the variable volume chamber, and the second sealing hole is in communication with the suction chamber;

   The housing is provided with a first through hole and a second through hole, the first through hole is arranged corresponding to the first sealing hole, and the second through hole is arranged corresponding to the second sealing hole;

   Wherein, the other end of the first sealing pipe passes through the first through hole to communicate with the first sealing hole, and the other end of the second sealing pipe passes through the second through hole to communicate with the first sealing hole. The two sealing holes are connected.
3. The compressor of claim 2, wherein the valve assembly further comprises:

   A third sealing tube, one end of the third sealing tube communicates with the third port;

   Based on the communication between the third port and the exhaust chamber, the pump body is further provided with a third sealing hole communicating with the exhaust chamber, and the housing is provided with a third sealing hole connected to the exhaust chamber. A third through hole corresponding to the hole, the other end of the third sealing tube passes through the third through hole to be connected to the third sealing hole; or

   Based on the communication between the third port and the accommodating cavity, the housing is provided with a third through hole communicating with the accommodating cavity, and the other end of the third sealing tube is connected with the third through hole Pass.
4. The compressor of claim 3, wherein the valve assembly further comprises:

   A catheter, the catheter is sheathed outside any one of the first sealed tube, the second sealed tube, and the third sealed tube, and connects the housing, the first sealed tube, and the Any one of the second sealing tube and the third sealing tube is connected.
5. The compressor according to claim 4, wherein:

   The first sealing tube includes a body configured as a cavity with an opening at one end, a connection port communicating with the cavity is provided on the body, and the opening is configured to be connected to the first cavity. The sealing hole is connected;

   The valve includes a valve body and a connecting pipe. The valve body is provided with the first port, the second port, and the third port. One end of the connecting pipe is in communication with the connecting port, and the other end is Is configured to communicate with the first port;

   Wherein, the structure of the second sealed tube, the third sealed tube and the first sealed tube are the same or different.
6. The compressor according to any one of claims 2 to 5, wherein:

   The first sealing hole and the second sealing hole are tapered holes;

   The end of the first sealing tube facing away from the first port has a cone structure;

   The end of the second sealing tube away from the second port has a cone structure.
7. The compressor of claim 5, wherein the valve further comprises:

   The valve seat is arranged outside the housing and connected to the housing, and the valve body is connected to the valve seat;

   The valve stem is connected with the valve body;

   The valve assembly further includes a control element connected to the valve stem, and the control element is configured to drive the valve stem to switch between the first port, the second port, and the third port. Connected state.
8. The compressor according to claim 7, wherein the control mode of the control element is at least one of the following:

   Mechanical control, pneumatic control, electric control.
9. The compressor according to any one of claims 1 to 5, further comprising:

   The cover is arranged outside the housing, and at least part of the valve assembly is arranged inside the cover.
10. A compressor operation control method for the compressor according to any one of claims 1 to 9, wherein the compressor operation control method includes:

    Acquiring an operating mode command of the compressor;

    According to the operation mode instruction, the valve assembly is controlled to switch the communication state of the first port, the second port, and the third port.
11. The operation control method of the compressor according to claim 10, wherein the operation mode instruction includes a first operation mode instruction and a second operation mode instruction, and the valve assembly is controlled to switch positions according to the operation mode instruction. The step of the connection state of the first port, the second port, and the third port specifically includes:

    According to the first operating mode command, the first port and the second port of the valve assembly are controlled to communicate, the third port is disconnected from the first port, and the third port is connected to the The second port is disconnected;

    According to the second operating mode instruction, the first port and the third port of the valve assembly are controlled to communicate, the second port is disconnected from the first port, and the second port is connected to the The third port is disconnected.
12. The operation control method of the compressor according to claim 11, wherein:

    The first operation mode command is a compressor partial capacity operation mode command;

    The second operation mode command is a compressor full-capacity operation mode command.
13. A refrigeration equipment, including:

    Heat exchanger; and

    The compressor according to any one of claims 1 to 9, wherein the heat exchanger is in communication with the compressor.

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