CN219014685U - Air conditioner - Google Patents

Abstract

The application provides an air conditioner relates to air conditioner technical field for solve when getting into centrifugal oil separator's gas velocity of flow low, lead to centrifugal oil separator's oil-gas separation effect poor problem. The air conditioner comprises a compressor, a connecting pipeline, a centrifugal oil separator, a first valve for controlling the communication between an air outlet of the compressor and a first air inlet channel, a second valve for controlling the communication between the air outlet of the compressor and a second air inlet channel, a gas flow rate detection device for detecting the gas flow rate in the connecting pipeline, and a controller for controlling the opening or closing of the first valve and the second valve according to the gas flow rate in the connecting pipeline, wherein the centrifugal oil separator comprises the first air inlet channel and the second air inlet channel, and the cross section area of the first air inlet channel along the direction perpendicular to the extending direction is larger than the cross section area of the second air inlet channel along the direction perpendicular to the extending direction; one end of the connecting pipeline is communicated with the air outlet of the compressor, and the other end of the connecting pipeline is communicated with the first air inlet channel and the second air inlet channel.

Description

Air conditioner

Technical Field

The application relates to the technical field of air conditioners, in particular to an air conditioner.

Background

During operation of the oil-containing air conditioning system, the compressor will continuously discharge a mixed fluid of high pressure refrigerant gas and lubricating oil. The heat resistance of heat exchange can be increased when the lubricating oil enters the heat exchanger, and the heat exchange efficiency of the heat exchanger is affected. Meanwhile, excessive lubricating oil is discharged, lubrication among internal parts of the compressor is insufficient, abrasion is increased, and reliability and service life of the compressor are affected.

Therefore, an oil-gas separation device (such as a centrifugal oil separator) is usually added on the exhaust pipeline of the compressor to separate out the lubricating oil and send the lubricating oil back to the compressor, so that the normal lubrication operation of the compressor is ensured, and the stable operation of the refrigerating system is ensured. The centrifugal oil separator works on the principle that a mixture of refrigerant gas and lubricating oil enters the cylinder body in a tangential direction through an air inlet pipe of the oil separator, and then the gas rotates at a high speed along the spiral guide vane and flows from top to bottom. Under the action of centrifugal force, the oil drops with higher density are thrown on the cylinder wall, flow down along the cylinder wall and are accumulated at the bottom of the cylinder body. The refrigerant gas is discharged through the exhaust pipe in the center of the cylinder. Among them, the gas flow rate is an important factor affecting the separation effect of the oil separator.

However, under certain working conditions, the compressor has small displacement, low exhaust speed, low flow rate entering the oil separator, poor oil-gas separation effect, and the majority of oil enters the system along with the airflow, which is unfavorable for efficient heat exchange of the refrigeration system and may affect the stable operation of the compressor.

Disclosure of Invention

The application provides an air conditioner for solve when the gas velocity of flow that gets into centrifugal oil separator is low, lead to centrifugal oil separator's oil-gas separation effect poor technical problem.

The application provides an air conditioner, comprising: the device comprises a compressor, a connecting pipeline, a centrifugal oil separator, a first valve, a second valve, a gas flow rate detection device and a controller; wherein, centrifugal oil separator includes: the air inlet device comprises a first air inlet channel and a second air inlet channel, wherein the cross-sectional area of the first air inlet channel along the direction perpendicular to the extending direction is larger than the cross-sectional area of the second air inlet channel along the direction perpendicular to the extending direction; one end of the connecting pipeline is communicated with the air outlet of the compressor, and the other end of the connecting pipeline is communicated with the first air inlet channel and the second air inlet channel; the first valve is arranged on a connecting pipeline close to one side of the first air inlet channel and used for controlling whether the air outlet of the compressor is communicated with the first air inlet channel or not; the second valve is arranged on a connecting pipeline close to one side of the second air inlet channel and used for controlling whether the air outlet of the compressor is communicated with the second air inlet channel or not; the gas flow rate detection device is arranged on the connecting pipeline close to one side of the compressor and is used for detecting the gas flow rate in the connecting pipeline; the controller is used for controlling the opening or closing of the first valve and the second valve according to the gas flow rate in the connecting pipeline.

The air conditioner in this application includes: a compressor, a connecting pipe, and a centrifugal oil separator comprising: the first air inlet channel and the second air inlet channel, one end of the connecting pipeline is communicated with the air outlet of the compressor, and the other end of the connecting pipeline is communicated with the first air inlet channel and the second air inlet channel. Thus, the mixture (i.e., refrigerant gas and lubricating oil) flowing out of the compressor can flow into the centrifugal oil separator along the connecting pipe.

In addition, the first valve is arranged on the connecting pipeline close to one side of the first air inlet channel and used for controlling whether the air outlet of the compressor is communicated with the first air inlet channel or not; the second valve is arranged on a connecting pipeline close to one side of the second air inlet channel and used for controlling whether the air outlet of the compressor is communicated with the second air inlet channel or not; the gas flow rate detection device is arranged on the connecting pipeline close to one side of the compressor and is used for detecting the gas flow rate in the connecting pipeline; the controller is used for controlling the opening or closing of the first valve and the second valve according to the gas flow rate in the connecting pipeline.

Therefore, when the load of the compressor is large and the discharge amount is large under the normal working condition, the flow rate of the mixed fluid of the refrigerant gas and the lubricating oil discharged by the compressor is high, the controller can control the first valve to be opened and the second valve to be closed, and the centrifugal oil separator can separate the refrigerant gas from the lubricating oil due to the high flow rate of the mixed fluid of the refrigerant gas and the lubricating oil discharged by the compressor. When the air displacement of the compressor is small under certain working conditions, the air flow rate detection device detects that the air flow rate is low, the controller controls the second valve to be opened and the first valve to be closed, and the cross section area of the first air inlet channel along the direction vertical to the extending direction is larger than that of the second air inlet channel along the direction vertical to the extending direction, so that the air flow area is reduced, the flow rate of the mixed fluid of the refrigerant flowing in from the second air inlet pipeline is increased, the refrigerant gas and the lubricating oil are always in a higher speed state, the oil separator is guaranteed to have a better separation effect, and the stable operation of the refrigerating system is facilitated.

In some embodiments of the present application, the first valve and the second valve are each solenoid valves.

In some embodiments of the present application, the controller is configured to: when the gas flow rate in the connecting pipeline is larger than or equal to a first preset value, the first valve is controlled to be opened, and the second valve is controlled to be closed; and when the gas flow rate in the connecting pipeline is smaller than the first preset value, controlling the second valve to be opened and controlling the first valve to be closed.

In some embodiments of the present application, the first valve and the second valve are both normally closed solenoid valves; the controller is configured to: when the gas flow rate in the connecting pipeline is greater than or equal to a first preset value, the first valve is controlled to be opened; and when the gas flow rate in the connecting pipeline is smaller than the first preset value, controlling the second valve to be opened.

In some embodiments of the present application, the first air intake channel and the second air intake channel are circular in cross section along a direction perpendicular to the extending direction, and the radial length of the first air intake channel is greater than the radial length of the second air intake channel.

In some embodiments of the present application, the centrifugal oil separator further comprises: a third air intake passage; the cross-sectional area of the third air inlet channel along the direction perpendicular to the extending direction is larger than the cross-sectional area of the first air inlet channel along the direction perpendicular to the extending direction; the other end of the connecting pipeline is also communicated with the third air inlet channel; the air conditioner further includes: the third valve is arranged on a connecting pipeline close to one side of the third air inlet channel and is used for controlling whether the air outlet of the compressor is communicated with the third air inlet channel or not; the controller is also used for controlling the opening or closing of the third valve.

In some embodiments of the present application, the connecting conduit comprises: one end of the first pipeline is communicated with the air outlet of the compressor; the gas flow rate detection device is arranged on the first pipeline; one end of the second pipeline is communicated with the other end of the first pipeline; the other end of the second pipeline is communicated with the first air inlet channel, and the first valve is arranged on the second pipeline; one end of the third pipeline is also communicated with the other end of the first pipeline; the other end of the third pipeline is communicated with the second air inlet channel, and the second valve is arranged on the third pipeline.

In some embodiments of the present application, the first and second inlet passages are both located in an upper portion of the centrifugal oil separator.

In some embodiments of the present application, the centrifugal oil separator further comprises: an oil separator exhaust port provided at an upper portion of the centrifugal oil separator, for exhausting refrigerant gas; and the oil discharge port of the oil separator is positioned at the bottom of the centrifugal oil separator and is used for discharging lubricating oil.

Drawings

The accompanying drawings are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate and do not limit the utility model.

Fig. 1 is a schematic perspective view of an air conditioner according to an embodiment of the present application;

fig. 2 is a schematic structural diagram of an air conditioner according to an embodiment of the present application;

FIG. 3 is a schematic perspective view of a centrifugal oil separator according to an embodiment of the present disclosure;

FIG. 4 is a second schematic diagram of an air conditioner according to an embodiment of the present disclosure;

fig. 5 is a schematic diagram of a circuit connection structure of an air conditioner according to an embodiment of the present application;

FIG. 6 is a schematic diagram showing a second perspective view of a centrifugal oil separator according to an embodiment of the present disclosure;

FIG. 7 is one of the cross-sectional views of a centrifugal oil separator provided in an embodiment of the present application;

FIG. 8 is a second cross-sectional view of a centrifugal oil separator provided in an embodiment of the present application;

FIG. 9 is a second schematic diagram of a circuit connection structure of an air conditioner according to an embodiment of the present disclosure;

fig. 10 is a third schematic structural diagram of an air conditioner according to an embodiment of the present disclosure.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present application, it should be noted that, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context. In addition, when describing a pipeline, the terms "connected" and "connected" as used herein have the meaning of conducting. The specific meaning is to be understood in conjunction with the context.

In the embodiments of the present application, words such as "exemplary" or "such as" are used to mean serving as examples, illustrations, or descriptions. Any embodiment or design described herein as "exemplary" or "for example" should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion.

For ease of understanding, the basic concepts of some terms or techniques involved in embodiments of the present utility model are first briefly described and illustrated.

Cooling mode: the compressor of the air conditioner sucks the low-temperature low-pressure gaseous refrigerant evaporated by the evaporator into a compressor cavity, compresses the low-temperature low-pressure gaseous refrigerant into a high-temperature high-pressure gaseous refrigerant, and enters the condenser. The high-temperature high-pressure gas refrigerant is condensed into a high-temperature high-pressure liquid refrigerant in the condenser, then the high-temperature high-pressure liquid refrigerant is throttled by a throttling element such as a capillary tube, and then the high-temperature high-pressure gas refrigerant becomes a low-temperature low-pressure liquid refrigerant, and finally the low-pressure liquid refrigerant returns to the compressor after entering the evaporator to evaporate, so that the whole refrigeration cycle is completed. The outdoor heat exchanger in the refrigerating mode is used as a condenser, and the indoor heat exchanger is used as an evaporator.

Refrigerant: a substance which is easily absorbed in heat to become gas and easily released in heat to become liquid. In the air conditioner, heat energy is transferred by evaporation and condensation of a refrigerant, thereby generating a freezing effect.

The air conditioner of the present utility model performs a refrigerating cycle of the air conditioner by using a compressor, a condenser, an expansion valve, and an evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion, and evaporation, and supplies a refrigerant to the air that has been conditioned and heat exchanged. The condenser and the evaporator both belong to the heat exchanger, and are the condenser when the heat exchanger realizes the condensing function, and are the evaporator when the heat exchanger realizes the evaporating function.

The compressor compresses a refrigerant gas in a high-temperature and high-pressure state and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and heat is released to the surrounding environment through the condensation process.

The expansion valve expands the liquid-phase refrigerant in a high-temperature and high-pressure state condensed in the condenser into a low-pressure liquid-phase refrigerant. The evaporator evaporates the refrigerant expanded in the expansion valve and returns the refrigerant gas in a low-temperature and low-pressure state to the compressor. The evaporator may achieve a cooling effect by exchanging heat with a material to be cooled using latent heat of evaporation of a refrigerant. The air conditioner may adjust the temperature of the indoor space throughout the cycle.

Fig. 1 shows a schematic perspective view of an air conditioner according to an embodiment of the present application, and as shown in fig. 1, the air conditioner 1000 includes: the indoor unit 100 and the outdoor unit 200, wherein the outdoor unit 200 of the air conditioner 1000 refers to a portion of a refrigeration cycle including a compressor and an outdoor heat exchanger, the indoor unit 100 of the air conditioner 1000 includes an indoor heat exchanger, and an expansion valve may be provided in the indoor unit 100 or the outdoor unit 200.

The indoor heat exchanger and the outdoor heat exchanger function as a condenser or an evaporator. When the outdoor heat exchanger is used as a condenser in the cooling mode, the indoor heat exchanger is used as an evaporator. When the outdoor heat exchanger is used as an evaporator in the heating mode, the indoor heat exchanger is used as a condenser.

In the present application, the air conditioner 1000 is configured such that a high-temperature and high-pressure refrigerant discharged from a compressor flows into a condenser during a heating operation. In this case, the condenser functions as a radiator. Therefore, the refrigerant flows through the condenser to heat the indoor air by heat exchange with the indoor air, and is cooled by self-heat radiation. The low-temperature high-pressure refrigerant whose temperature is removed by the condenser is depressurized by the expansion valve to be changed into a low-temperature low-pressure refrigerant. The refrigerant flowing into the evaporator through the expansion valve is heated by heat exchange with the outdoor air. The primarily low temperature gaseous refrigerant is then drawn from the evaporator into the compressor via the accumulator.

When the air conditioner 1000 is in operation, the compressor continuously discharges a mixed fluid of high-pressure refrigerant gas and lubricating oil. The heat resistance of heat exchange can be increased when the lubricating oil enters the heat exchanger, and the heat exchange efficiency of the heat exchanger is affected. To avoid the entry of lubricating oil into the heat exchanger, a centrifugal oil separator is typically added to the discharge line of the compressor, which is capable of separating the lubricating oil from the refrigerant gas and returning the lubricating oil to the compressor. The centrifugal oil separator works on the principle that a mixture of refrigerant gas and lubricating oil enters the cylinder body in a tangential direction through an air inlet pipe of the oil separator, and then the gas rotates at a high speed along the spiral guide vane and flows from top to bottom. Under the action of centrifugal force, the oil drops with higher density are thrown on the cylinder wall, flow down along the cylinder wall and are accumulated at the bottom of the cylinder body. The refrigerant gas is discharged through the exhaust pipe in the center of the cylinder. Thus, the gas flow rate is an important factor affecting the separation effect of the centrifugal oil separator.

However, under certain conditions (e.g., light load conditions or boundary conditions), the compressor has a small displacement, a low discharge velocity, and a low flow rate into the oil separator, resulting in poor oil-gas separation of the centrifugal oil separator, and lubricating oil flowing into the heat exchanger, thereby affecting the normal operation of the air conditioner.

The application provides an air conditioner, can improve centrifugal oil separator oil-gas separation effect, guarantee the normal operating of air conditioner.

Fig. 2 shows a schematic structural diagram of an air conditioner according to an embodiment of the present application, and as shown in fig. 2, the air conditioner 1000 includes: a compressor 10, a connecting pipe 20, a centrifugal oil separator 30, a first valve 40, a second valve 50, a gas flow rate detecting device 60, and a controller 70.

The compressor 10 includes: the compressor 10 is a driven fluid machine that lifts low pressure gas to high pressure gas, and is the heart of the air conditioner 1000. The low-temperature low-pressure refrigerant gas is sucked from the gas inlet, the motor is operated to drive the piston to compress the low-temperature low-pressure refrigerant gas, and then the high-temperature high-pressure refrigerant gas is discharged to the gas outlet to provide power for refrigeration cycle.

Fig. 3 shows a schematic perspective view of a centrifugal oil separator according to an embodiment of the present application, and as shown in fig. 3, the centrifugal oil separator 30 includes: the first air intake passage 31 and the second air intake passage 32, wherein a cross-sectional area of the first air intake passage 31 in a direction perpendicular to the extending direction is larger than a cross-sectional area of the second air intake passage 32 in a direction perpendicular to the extending direction. That is, as shown in fig. 3, the diameter of the first air intake passage 31 is larger than the diameter of the second air intake passage 32.

Since the refrigerant gas and the lubricating oil enter the guide vane of the centrifugal oil separator 30 after entering the centrifugal oil separator 30, and flow spirally along the guide vane, the lubricating oil is separated from the working medium gas by centrifugal force and gravity, and flows down along the inner wall of the cylinder. Accordingly, the first intake passage 31 and the second intake passage 32 may each be located at an upper portion (i.e., Y-axis direction in fig. 3) of the centrifugal oil separator 30.

In addition, since the centrifugal oil separator 30 can separate the refrigerant gas and the lubricating oil, as shown in fig. 4, the centrifugal oil separator 30 may further include: an oil separator exhaust port 33 and an oil separator drain port 34; the oil separator exhaust port 33 is provided at an upper portion of the centrifugal oil separator 30 for exhausting refrigerant gas; an oil separator drain 34 is located at the bottom of the centrifugal oil separator 30 and communicates with the compressor 10 for draining lubricant to the compressor 10.

One end of the connecting pipe 20 is communicated with the air outlet of the compressor 10, and the other end of the connecting pipe 20 is communicated with both the first air inlet channel 31 and the second air inlet channel 32. The material and caliber of the connecting pipe 20 are not limited in this application, and may be set according to specific situations.

As shown in fig. 2, the first valve 40 is provided on the connection pipe 20 near the side of the first air inlet passage 31, for controlling whether the air outlet of the compressor 10 communicates with the first air inlet passage 31. I.e., the first valve 40 is used to control whether the refrigerant gas and the lubricating oil discharged from the compressor 10 flow from the first air intake passage 31 into the centrifugal oil separator 30. The second valve 50 is disposed on the connecting pipe 20 near the side of the second air intake passage 32, for controlling whether the air outlet of the compressor 10 communicates with the second air intake passage 32. I.e., the second valve 50 is used to control whether the refrigerant gas and the lubricating oil discharged from the compressor 10 flow from the second air intake passage 32 into the centrifugal oil separator 30.

In one possible implementation, the first valve 40 and the second valve 50 are each solenoid valves. The Solenoid valve (Solenoid valve) is an industrial device controlled by electromagnetic, is an automatic base element for controlling fluid, belongs to an actuator, and is not limited to hydraulic and pneumatic. For use in industrial control systems to adjust the direction, flow, velocity and other parameters of the medium. The electromagnetic valve can be matched with different circuits to realize expected control, and the control precision and flexibility can be ensured. In this way, the control accuracy and flexibility of the controller 70 can be improved.

In addition, a gas flow rate monitoring device 60 is provided on the connection pipe 20 near the side of the compressor 10 for detecting the gas flow rate in the connection pipe 20.

Alternatively, the gas flow rate monitoring device 60 may be a gas flow rate detector, alternatively, the gas flow rate monitoring device 60 may be another device for detecting a gas flow rate, and the gas flow rate monitoring device 60 is not limited in this application.

Fig. 5 shows a schematic circuit connection structure of an air conditioner according to an embodiment of the present application, as shown in fig. 5, the controller 70 is electrically connected to the gas flow rate monitoring device 60, the first valve 40 and the second valve 50, and the controller 70 is configured to control opening or closing of the first valve 40 and the second valve 50 according to a gas flow rate in the connection pipe 20.

In the embodiment shown in the present application, the controller 70 refers to a device that can generate an operation control signal according to a command operation code and a timing signal, and instruct the air conditioner 1000 to execute a control command. By way of example, the controller 70 may be a central processing unit (central processing unit, CPU), a general purpose processor network processor (network processor, NP), a digital signal processor (digital signal processing, DSP), a programmable logic device (programmable logic device, PLD), a microprocessor, a microcontroller, or any combination thereof. The controller 70 may also be any other device having a processing function, such as a circuit, a device, or a software module, which is not limited in any way by the embodiments of the present application.

In some embodiments, the controller 70 may be a micro control unit (microcontroller unit, MCU). The MCU is also called a single chip microcomputer (single chip microcomputer) or a single chip microcomputer, which properly reduces the frequency and specification of a central processing unit (central process unit, CPU), and integrates peripheral interfaces such as a memory (memory), a counter (Timer), USB, A/D conversion, UART, PLC, DMA and the like, and even an LCD driving circuit on a single chip to form a chip-level computer for different application occasions to perform different combination control.

In addition, the controller 70 may be used to control operations of various components within the air conditioner 1000 such that the various components of the air conditioner 1000 operate to perform various predetermined functions of the air conditioner 1000.

By way of example, the controller 70 may execute the following control instructions: when the gas flow rate in the connecting pipeline 20 is greater than or equal to a first preset value, the first valve 40 is controlled to be opened, and the second valve 50 is controlled to be closed; when the gas flow rate in the connecting pipe 20 is less than the first preset value, the second valve 50 is controlled to be opened and the first valve 40 is controlled to be closed. The first preset value is preset, and is also limited by the refrigerant type and the structural shape of the centrifugal separator 30, and can be a value of an inlet speed range of the centrifugal separator 30 with optimal separation effect. The present application is not limited in this regard.

The air conditioner 1000 in the present application includes: a compressor 10, a connecting pipe 20, and a centrifugal oil separator 30, the centrifugal oil separator 30 comprising: the first air inlet channel 31 and the second air inlet channel 32, one end of the connecting pipeline 20 is communicated with the air outlet of the compressor 10, and the other end of the connecting pipeline 20 is communicated with both the first air inlet channel 31 and the second air inlet channel 32. Thus, the mixture (i.e., the refrigerant gas and the lubricating oil) flowing out of the compressor 10 can flow into the centrifugal oil separator 30 along the connection pipe 20.

In addition, a first valve 40 is provided on the connection pipe 20 near one side of the first air inlet channel 31 for controlling whether the air outlet of the compressor 10 is communicated with the first air inlet channel 31; the second valve 50 is disposed on the connecting pipe 20 near one side of the second air inlet channel 32, and is used for controlling whether the air outlet of the compressor 10 is communicated with the second air inlet channel 32; the gas flow rate monitoring device 60 is arranged on the connecting pipeline 20 near one side of the compressor 10 and is used for detecting the gas flow rate in the connecting pipeline 20; the controller 70 is used to control the opening or closing of the first valve 40 and the second valve 50 according to the flow rate of the gas in the connection pipe 20.

Thus, when the load of the compressor 10 is large and the discharge amount is large and the flow rate of the refrigerant gas and lubricant oil mixture discharged from the compressor 10 is high under the normal operation, the controller 70 may control the first valve 40 to be opened and the second valve 50 to be closed, and the centrifugal oil separator 30 may separate the refrigerant gas and lubricant oil due to the high flow rate of the refrigerant gas and lubricant oil mixture discharged from the compressor 10. When the displacement of the compressor 10 is small and the gas flow rate monitoring device 60 detects that the gas flow rate is low under certain working conditions, the controller 70 controls the second valve 50 to open and the first valve 40 to close, and the cross-sectional area of the first air inlet channel 31 along the direction perpendicular to the extending direction is larger than the cross-sectional area of the second air inlet channel 32 along the direction perpendicular to the extending direction, that is, the flow area of the gas is reduced, so that the flow rate of the mixed fluid of the refrigerant flowing into the second air inlet channel is increased, the refrigerant gas and the lubricating oil are always in a higher speed state, the better separation effect of the oil separator is ensured, and the stable operation of the refrigerating system is facilitated.

In some embodiments, the first valve 40 and the second valve 50 are each normally closed solenoid valves; i.e. the first valve 40 and the second valve 50 are in a closed state in a normal state. The controller 70 may be configured to execute the following control instructions: when the gas flow rate in the connecting pipeline 20 is greater than or equal to a first preset value, the first valve 40 is controlled to be opened; when the gas flow rate in the connecting duct 20 is less than the first preset value, the second valve 50 is controlled to be opened. Thus, the controller 70 only needs to control one electromagnetic valve, and the control program of the controller 70 is simple and difficult to cause problems.

Fig. 6 shows a schematic perspective view of a centrifugal oil separator according to an embodiment of the present application, fig. 7 is a cross-sectional view of the centrifugal oil separator according to an embodiment of the present application, and fig. 7 is a cross-sectional view along a line a of fig. 6. In some embodiments, as shown in fig. 6 and 7, the first air intake passage 31 and the second air intake passage 32 are circular in cross section perpendicular to the extending direction, and the radial length of the first air intake passage 31 is greater than the radial length of the second air intake passage 32. I.e. the first inlet channel 31 has a larger caliber than the second inlet channel 32.

Because connecting duct 20 is generally circular, the cross-section of this application along perpendicular to extending direction of first inlet channel 31 and second inlet channel 32 all designs to be circular to this inlet channel and connecting duct 20's cooperation intercommunication is convenient, convenient equipment.

In some embodiments, as shown in fig. 8, the centrifugal oil separator 30 further includes: a third intake passage 35; the cross-sectional area of the third air intake passage 35 in the direction perpendicular to the extending direction is larger than the cross-sectional area of the first air intake passage 31 in the direction perpendicular to the extending direction; the other end of the connecting duct 20 is also communicated with a third air intake passage 35; the air conditioner 1000 further includes: a third valve 80, the third valve 80 being disposed on the connecting pipe 20 near one side of the third air inlet channel, for controlling whether the air outlet of the compressor 10 is communicated with the third air inlet channel 35; as shown in fig. 9, the controller 70 is further electrically connected to the third valve 80, and is further configured to control the opening or closing of the third valve 80.

The controller 70 may also be configured to: when the gas flow rate in the connecting pipeline 20 is larger than or equal to the first preset value and smaller than the second preset value, the first valve 40 is controlled to be opened, and the second valve 50 and the third valve 80 are controlled to be closed; when the gas flow rate in the connecting pipeline 20 is greater than or equal to the second preset value, the third valve 80 is controlled to be opened, and the first valve 40 and the second valve 50 are controlled to be closed; when the gas flow rate in the connecting pipe 20 is less than the first preset value, the second valve 50 is controlled to be opened, and the first valve 40 and the third valve 80 are controlled to be closed.

In this way, by arranging three air inlet channels with different calibers, namely an air inlet channel with a normal caliber, a channel with a reduced caliber and a channel with an enlarged caliber, the influence of the too low and too high gas flow rate on the oil-gas separation effect is avoided.

In some embodiments, the centrifugal oil separator 30 may further include: the fourth air intake channel, the fifth air intake channel, etc. are not described in detail herein, and reference may be made to the third air intake channel.

In addition, in some embodiments, as shown in fig. 10, the connecting duct 20 includes: a first pipe 21, a second pipe 22, and a third pipe 23, wherein one end of the first pipe 21 communicates with an air outlet of the compressor 10; the gas flow rate monitoring device 60 is provided on the first pipe 21; one end of the second pipe 22 communicates with the other end of the first pipe 21; the other end of the second pipe 22 communicates with the first air intake passage 31, and a first valve 40 is provided on the second pipe 22; one end of the third pipe 23 is also communicated with the other end of the first pipe 21; the other end of the third duct 23 communicates with the second intake passage 32, and a second valve 50 is provided on the third duct 23.

The foregoing is merely a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and any changes or substitutions within the technical scope of the present disclosure should be covered in the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (9)

1. An air conditioner, comprising:

a compressor and a connecting pipe;

a centrifugal oil separator, the centrifugal oil separator comprising: a first air intake passage and a second air intake passage, wherein a cross-sectional area of the first air intake passage along a direction perpendicular to the direction of extension is greater than a cross-sectional area of the second air intake passage along a direction perpendicular to the direction of extension; one end of the connecting pipeline is communicated with the air outlet of the compressor, and the other end of the connecting pipeline is communicated with the first air inlet channel and the second air inlet channel;

the first valve is arranged on the connecting pipeline close to one side of the first air inlet channel and used for controlling whether the air outlet of the compressor is communicated with the first air inlet channel or not;

the second valve is arranged on the connecting pipeline close to one side of the second air inlet channel and is used for controlling whether the air outlet of the compressor is communicated with the second air inlet channel or not;

the gas flow rate detection device is arranged on the connecting pipeline close to one side of the compressor and is used for detecting the gas flow rate in the connecting pipeline;

and the controller is used for controlling the opening or closing of the first valve and the second valve according to the gas flow rate in the connecting pipeline.

2. The air conditioner of claim 1, wherein the first valve and the second valve are solenoid valves.

3. The air conditioner of claim 2, wherein the controller is configured to: when the gas flow rate in the connecting pipeline is larger than or equal to a first preset value, the first valve is controlled to be opened, and the second valve is controlled to be closed; and when the gas flow rate in the connecting pipeline is smaller than the first preset value, controlling the second valve to be opened and controlling the first valve to be closed.

4. The air conditioner of claim 2, wherein the first valve and the second valve are both normally closed solenoid valves;

the controller is configured to: when the gas flow rate in the connecting pipeline is greater than or equal to a first preset value, the first valve is controlled to be opened; and when the gas flow rate in the connecting pipeline is smaller than the first preset value, controlling the second valve to be opened.

5. The air conditioner of claim 1, wherein the first air intake passage and the second air intake passage are circular in cross section perpendicular to the extending direction, and the radial length of the first air intake passage is greater than the radial length of the second air intake passage.

6. The air conditioner of claim 1, wherein the centrifugal oil separator further comprises: a third air intake passage; the cross-sectional area of the third air inlet channel along the direction perpendicular to the extending direction is larger than the cross-sectional area of the first air inlet channel along the direction perpendicular to the extending direction; the other end of the connecting pipeline is also communicated with the third air inlet channel;

the air conditioner further includes: the third valve is arranged on a connecting pipeline close to one side of the third air inlet channel and is used for controlling whether the air outlet of the compressor is communicated with the third air inlet channel or not;

the controller is also used for controlling the opening or closing of the third valve.

7. The air conditioner of claim 1, wherein the connection pipe comprises:

one end of the first pipeline is communicated with the air outlet of the compressor; the gas flow rate detection device is arranged on the first pipeline;

one end of the second pipeline is communicated with the other end of the first pipeline; the other end of the second pipeline is communicated with the first air inlet channel, and the first valve is arranged on the second pipeline;

one end of the third pipeline is also communicated with the other end of the first pipeline; the other end of the third pipeline is communicated with the second air inlet channel, and the second valve is arranged on the third pipeline.

8. The air conditioner of claim 1, wherein the first and second intake passages are both located at an upper portion of the centrifugal oil separator.

9. The air conditioner of claim 1, wherein the centrifugal oil separator further comprises:

an oil separator exhaust port provided at an upper portion of the centrifugal oil separator, for exhausting refrigerant gas;

and the oil discharge port of the oil separator is positioned at the bottom of the centrifugal oil separator and is used for discharging lubricating oil.

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