CN217584950U - Magnetic suspension air conditioning unit - Google Patents

Abstract

The utility model discloses a magnetic suspension air conditioning unit, which comprises a compressor, an evaporator, a condenser and an economizer; the upper portion of the economizer is provided with a cooling gas outlet, the compressor is provided with a cooling inlet and a cooling outlet, the cooling gas outlet of the economizer is connected with the cooling inlet of the compressor through a first pipeline, and the cooling outlet of the compressor is connected with the cooling reflux inlet of the evaporator. The utility model discloses magnetic suspension air conditioning unit, the coolant gas export of economizer and the coolant gas entry of compressor are through first tube coupling, the coolant gas of the medium temperature middling pressure in economizer upper portion cools off the higher magnetic suspension bearing of temperature and electric motor rotor in the compressor, the coolant gas that adopts to come from the economizer promptly cools off the compressor, the problem of adopting condenser supercooling liquid cooling to easily make the inside hydrops of compressor take place impeller liquid to hit the damage or to rotor stable suspension cause the interference among the prior art has been solved, the security of compressor operation has been promoted, and stability.

Description

Magnetic suspension air conditioning unit

Technical Field

The utility model relates to an air conditioning technology field, concretely relates to magnetic suspension air conditioning unit's institutional advancement.

Background

The magnetic suspension compressor is one of main structural components of the magnetic suspension air conditioning unit, the magnetic suspension compressor is a compressor applying a magnetic suspension bearing technology, and the magnetic suspension bearing is a compressor which utilizes a magnetic field to suspend a rotor, so that mechanical contact and mechanical friction are not generated during rotation, and a mechanical bearing and a lubrication system required by the mechanical bearing are not required. Therefore, the magnetic suspension bearing is used in the refrigeration compressor, and the trouble caused by lubricating oil is avoided.

As shown in fig. 1, the cooling system generally adopts a refrigerant liquid for cooling in the industry of a bearing and motor winding cooling system (magnetic levitation compressor cooling system for short) of an existing magnetic levitation centrifugal compressor, and includes a compressor 10, an evaporator 20, a condenser 30 and an economizer 40, wherein an exhaust port 11 of the compressor 10 is connected to an air inlet 31 of the condenser 30, a liquid outlet 32 of the condenser 30 is connected to a liquid inlet 41 of the economizer 40, a liquid outlet 42 of the economizer 40 is connected to a liquid inlet 21 of the evaporator 20, an air outlet 22 of the evaporator 20 is connected to an air inlet 12 of the compressor 10, and an air replenishing outlet 43 of the economizer 40 is connected to an air replenishing inlet 13 of the compressor 10; the bottom of the condenser 30 is connected to a cooling pipeline 50, the other end of the cooling pipeline is connected to a cooling inlet 14 on the compressor 10, a cooling return inlet 23 is arranged on the evaporator 20, a cooling outlet 15 on the compressor 10 is connected to the cooling return inlet 23 of the evaporator 20, and a supercooled liquid refrigerant at the bottom of the condenser 30 is introduced into the compressor 10 through the cooling pipeline 50 to cool the magnetic suspension bearing and the motor rotor with higher temperature inside the compressor 10.

The cooling method adopts the cooling medium liquid for cooling because the bearings are directly contacted with the gear shaft in the traditional oil conventional centrifugal machine, the heat generated by the friction of the moving parts of the bearings is large, the temperature of the bearings is large, and the bearings need sufficient cooling to cool the bearings, so the cooling method adopts the cooling medium liquid for cooling, and the cooling method is developed into a magnetic suspension centrifugal compressor and then used. However, such a cooling method may cause a certain amount of refrigerant liquid to accumulate in the compressor, and if the refrigerant liquid is not discharged in time, the impeller may be damaged by liquid impact, or the rotor may be disturbed from stable suspension.

Aiming at the problem, some air conditioner manufacturers in the industry adopt a liquid level acquisition unit and a refrigerant input flow control unit added in the compressor, and a cooling control device is added to solve the problem of liquid accumulation in a cavity of the compressor, but the scheme has higher cost and complex control.

The above information disclosed in this background section is only for enhancement of understanding of the background of the application and therefore it may comprise prior art that does not constitute known to a person of ordinary skill in the art.

SUMMERY OF THE UTILITY MODEL

The utility model provides a magnetic suspension air conditioning unit can solve prior art and adopt the easy hydrops of refrigerant liquid cooling compressor to take place the impeller liquid and hit the damage, perhaps leads to the fact the problem of interference to rotor stable suspension.

In order to realize the purpose of the utility model, the utility model adopts the following technical scheme to realize:

in some embodiments of the present application, a magnetic levitation air conditioning unit is provided, which includes a compressor, an evaporator, a condenser and an economizer; a magnetic suspension bearing and a motor rotor are arranged in the compressor, an air outlet of the compressor is connected with an air inlet of the condenser, a liquid outlet of the condenser is connected with a liquid inlet of the economizer, a liquid outlet of the economizer is connected with a liquid inlet of the evaporator, an air outlet of the evaporator is connected with an air suction port of the compressor, and an air supply outlet of the economizer is connected with an air supply inlet of the compressor; the upper portion of economizer is equipped with the cooling gas export, be equipped with cooling entry and cooling export on the compressor, be equipped with the cooling return inlet on the evaporimeter, the cooling gas export of economizer with the cooling entry of compressor passes through first tube coupling, the cooling export of compressor with the cooling return inlet of evaporimeter is connected.

In some embodiments of the present application, a stop valve is disposed on the cooling gas outlet of the economizer.

In some embodiments of the present application, a first auxiliary refrigerant liquid outlet is disposed at the bottom of the condenser, the first auxiliary refrigerant liquid outlet is connected to the first pipeline through a second pipeline, and a first normally closed solenoid valve is disposed on the second pipeline.

In some embodiments of the present application, a check valve is disposed on the first pipeline and is used for preventing the refrigerant liquid in the second pipeline from entering the economizer along the first pipeline.

In some embodiments of the present application, flow control valves are disposed on the first pipeline and the second pipeline to correspondingly control a flow of the cooling fluid.

In some embodiments of the present application, a second auxiliary refrigerant liquid outlet is provided on the compressor, the second auxiliary refrigerant liquid outlet is connected to the evaporator through a third pipeline, and a second normally closed solenoid valve is provided on the third pipeline and is used for controlling on/off of the third pipeline.

In some embodiments of the present application, the first normally closed solenoid valve and the second normally closed solenoid valve are opened or closed simultaneously.

In some embodiments of the present application, the magnetic suspension air conditioning unit further includes a controller, the magnetic suspension bearing and the motor rotor are both provided with a temperature sensor, and the temperature sensor and the first normally closed solenoid valve are both in communication connection with the controller.

In some embodiments of the present application, the magnetic suspension air conditioning unit further includes a controller, a displacement sensor for detecting the elongation of the bearing rotating shaft is arranged at the magnetic suspension bearing, and the displacement sensor and the first normally closed solenoid valve are both in communication connection with the controller.

In some embodiments of this application, the upper portion of condenser is equipped with gas outlet, be equipped with gas inlet on the evaporimeter, the gas outlet of condenser with gas inlet on the evaporimeter passes through bypass line and connects, be equipped with electrical control valve on the bypass line and be used for controlling bypass line's break-make and aperture.

Compared with the prior art, the utility model discloses an advantage is with positive effect:

the utility model discloses among the magnetic suspension air conditioning unit, be equipped with the cooling gas export on its economic ware upper portion, be equipped with cooling gas entry and cooling gas export on the compressor, be equipped with the cooling return-air mouth on the evaporimeter, the cooling gas export of economic ware and the cooling gas entry of compressor pass through first tube coupling, the cooling gas export of compressor is connected with the cooling return-air mouth of evaporimeter, because of magnetic suspension compressor bearing and electric motor rotor department pressure are less than the pressure in the economic ware, the refrigerant gas of middle temperature middling pressure in economic ware upper portion gets into the compressor through the pressure differential between the two, cool off the higher magnetic suspension bearing of temperature and electric motor rotor in the compressor, gas after the cooling gets back to the evaporimeter through the cooling gas export on the compressor in, form a bearing and rotor circulative cooling process, adopt the refrigerant gas that comes from the middle temperature economic ware as normal operating's cooling means promptly, the problem that adopts condenser liquid cooling to easily make the inside hydrops of compressor take place impeller liquid impact damage or stabilize the suspension and cause the interference to the rotor among the prior art has been solved, the security of compressor operation has been promoted, stability.

Other features and advantages of the present invention will become more apparent from the following detailed description of the invention when read in conjunction with the accompanying drawings.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.

FIG. 1 is a schematic diagram of a prior art magnetic levitation air conditioning unit;

FIG. 2 is a schematic diagram of a magnetic levitation air conditioning unit according to an embodiment I;

fig. 3 is a perspective view of a compressor of a maglev air conditioning unit according to a first embodiment;

FIG. 4 is a front view of FIG. 3;

FIG. 5 is a schematic structural diagram of a magnetic levitation air conditioning unit according to a second embodiment;

FIG. 6 is an enlarged view of portion A of FIG. 5;

FIG. 7 is a schematic structural diagram of a magnetic levitation air conditioning unit according to a third embodiment;

FIG. 8 is an enlarged view of the portion B of FIG. 7;

fig. 9 is a perspective view of a compressor of the maglev air conditioning unit according to the third embodiment;

fig. 10 is a front view of fig. 8.

Reference numbers in fig. 1:

10-a compressor; 11-exhaust port; 12-suction port; 13-inlet for air supplement; 14-a cooling inlet; 15-a cooling outlet;

20-an evaporator; 21-a liquid inlet; 22-air outlet; 23-a cooling reflux inlet;

30-a condenser; 31-an air inlet; 32-a liquid outlet;

40-an economizer; 41-liquid inlet; 42-a liquid outlet; 43-air supply outlet;

50-cooling circuit.

Reference numbers in fig. 2-10:

10-a compressor; 11-an exhaust port; 12-suction port; 13-inlet for air supplement; 14-a cooling inlet; 15-a cooling outlet; 16-a second auxiliary refrigerant liquid outlet;

20-an evaporator; 21-liquid inlet; 22-air outlet; 23-cooling reflux inlet; 24-a gas inlet;

30-a condenser; 31-an air inlet; 32-a liquid outlet; 33-a first auxiliary refrigerant liquid outlet; 34-a gas outlet;

40-a condenser; 41-liquid inlet; 42-a liquid outlet; 43-air supplement outlet; 44-cooling gas outlet; 45-a stop valve;

50-a first conduit; 60-a second conduit; 70-a first normally closed solenoid valve; 80-a one-way valve; 90-a third pipeline; 100-a second normally closed solenoid valve; 110-a bypass line; 120-electric regulating valve.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, merely for convenience of description and simplicity of description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present application.

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

In the description of the present application, it should be noted that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The following disclosure provides many different embodiments or examples for implementing different features of the invention. In order to simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present disclosure may repeat reference numerals and/or reference letters in the various examples for purposes of simplicity and clarity and do not in itself dictate a relationship between the various embodiments and/or arrangements discussed. In addition, the present disclosure provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.

The air conditioner performs a refrigerating cycle of the air conditioner by using a compressor, a condenser, a throttle valve, and an evaporator in the present application. The refrigeration cycle includes a series of processes involving compression, condensation, throttling, and evaporation to cool or heat an indoor space.

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

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

Example one

Referring to fig. 2 to 4, the magnetic levitation air conditioning unit of the present embodiment includes a compressor 10, an evaporator 20, a condenser 30, and an economizer 40, and certainly includes other necessary structural components of the air conditioning unit, such as a throttling device, which are not described herein again. The cooling and heating cycle of the air conditioning unit is performed by using the compressor 10, the evaporator 20, the condenser 30, and the economizer 40.

The compressor 10 is a magnetic suspension compressor, a magnetic suspension bearing and a motor rotor are arranged in the compressor, and an exhaust port 11, an air suction port 12, an air supply inlet 13, a cooling inlet 14 and a cooling outlet 15 are arranged on the compressor 10.

The evaporator 20 is provided with a liquid inlet 21, a gas outlet 22 and a cooling reflux inlet 23.

The condenser 30 is provided with an air inlet 31 and a liquid outlet 32.

The economizer 40 is provided with a liquid outlet 41, a liquid inlet 42 and a gas supplementing outlet 43, and the upper part of the economizer is also provided with a cooling gas outlet 44.

The liquid outlet 32 of the condenser 30 is connected with the liquid inlet 42 of the economizer 40 through a pipeline, the liquid outlet 41 of the economizer 40 is connected with the liquid inlet 21 of the evaporator 20 through a pipeline, the gas outlet 22 of the evaporator 20 is connected with the gas suction port 12 of the compressor 10 through a pipeline, and the gas supplementing outlet 43 of the economizer 40 is connected with the gas supplementing inlet 13 of the compressor 10 through a pipeline, so that a refrigerant circulation loop is formed. Meanwhile, in the present embodiment, the cooling gas outlet 44 of the compressor 40 is connected to the cooling inlet 14 of the compressor 10 through the first pipe 50, and the cooling outlet 15 of the compressor 10 is connected to the cooling return inlet 23 of the evaporator 20.

In the embodiment, the upper part of the economizer 40 is connected with the cooling inlet 14 of the compressor 10 through the first pipeline 50, because the pressure at the magnetic suspension bearing and the motor rotor in the compressor 10 is lower than the pressure in the economizer 40, the medium-temperature and medium-pressure refrigerant gas at the upper part in the economizer 40 enters the compressor 10 through the pressure difference between the two, the magnetic suspension bearing and the motor rotor with higher temperature in the compressor 10 are cooled, and the cooled gas is connected with the evaporator 20 through the cooling outlet 15 at the rear end of the motor, that is, at the rear end of the compressor 10 and returns to the evaporator 20, so that a bearing and rotor circulating cooling process is formed. The cooling medium gas from the medium-pressure economizer 40 is used as a cooling means for normal operation, the problem that the accumulated liquid in the compressor is easy to cause impeller liquid impact damage or interfere with rotor stable suspension due to the fact that the condenser is used for cooling the supercooled liquid in the prior art is solved, and the safety and the stability of the operation of the compressor are improved.

In the embodiment, the stop valve 45 is arranged on the cooling gas outlet 44 of the economizer 40, so that the stop valve 45 can be closed when damaged parts in a pipeline need to be replaced, and the refrigerant does not need to be recycled by the whole economizer; meanwhile, the flow rate of the cooling fluid in the first pipeline 50 may also be roughly adjusted manually by adjusting the opening degree of the shutoff valve 45. The cut-off valve 45 may be an angle valve or other manual valve, and is not limited in particular.

Of course, if the flow rate of the cooling fluid in the first pipeline 50 is to be adjusted more finely, a flow rate adjusting valve, such as a manual valve or an electronic expansion valve, may be separately provided on the first pipeline 50.

Generally, most of the condenser 30 is liquid refrigerant, some uncondensed gaseous refrigerant may exist in the upper space thereof, for a high-speed centrifugal air conditioning unit, the air conditioning unit may surge when the condenser pressure is too high, in order to reduce the possibility of the surge of the air conditioning unit as much as possible, in the present embodiment, the upper portion of the condenser 30 is provided with a gas outlet 34, the evaporator 20 is provided with a gas inlet 24, the gas outlet 34 of the condenser 30 is connected with the gas inlet 24 of the evaporator 20 through a bypass pipe 110, the bypass pipe 110 is provided with an electric control valve 120 for controlling the on-off and the opening of the bypass pipe 110, when the electric control valve 120 is closed, the bypass pipe 110 is disconnected, when the electric control valve 120 is opened, the bypass pipe 110 is connected, at this time, the gaseous refrigerant in the upper portion of the condenser 30 can be introduced into the evaporator 20, the internal pressure of the condenser 30 is reduced, so that the possibility of the surge of the air conditioning unit can be reduced, and the flow rate of the gaseous refrigerant flowing through the bypass pipe 110 can be adjusted by adjusting the opening of the electric control valve 120.

Example two

Referring to fig. 5 and 6, the magnetic levitation air conditioning unit of the present embodiment includes a compressor 10, an evaporator 20, a condenser 30, and an economizer 40, and certainly includes other necessary structural components of the air conditioning unit, such as a throttling device, which are not described herein again. The refrigerating and heating cycle of the air conditioning unit is performed by using the compressor 10, the evaporator 20, the condenser 30, and the economizer 40.

The compressor 10 is a magnetic suspension compressor, a magnetic suspension bearing and a motor rotor are arranged in the compressor, and an exhaust port 11, an air suction port 12, an air supply inlet 13, a cooling inlet 14 and a cooling outlet 15 are arranged on the compressor 10.

The evaporator 20 is provided with a liquid inlet 21, a gas outlet 22 and a cooling reflux inlet 23.

The condenser 30 is provided with an air inlet 31 and a liquid outlet 32.

The economizer 40 is provided with a liquid outlet 41, a liquid inlet 42 and a make-up gas outlet 43, and the upper part of the economizer is also provided with a cooling gas outlet 44.

The liquid outlet 32 of the condenser 30 is connected with the liquid inlet 42 of the economizer 40 through a pipeline, the liquid outlet 41 of the economizer 40 is connected with the liquid inlet 21 of the evaporator 20 through a pipeline, the gas outlet 22 of the evaporator 20 is connected with the gas suction port 12 of the compressor 10 through a pipeline, and the gas supplementing outlet 43 of the economizer 40 is connected with the gas supplementing inlet 13 of the compressor 10 through a pipeline, so that a refrigerant circulation loop is formed. Meanwhile, in the present embodiment, the cooling gas outlet 44 of the economizer 40 is connected to the cooling inlet 14 of the compressor 10 through the first pipe 50, and the cooling outlet 15 of the compressor 10 is connected to the cooling return inlet 23 of the evaporator 20.

The bottom of the condenser 30 is further provided with a first auxiliary refrigerant liquid outlet 33, the first auxiliary refrigerant liquid outlet 33 is connected with the first pipeline 50 through a second pipeline 60, and the second pipeline 60 is provided with a first normally closed solenoid valve 70.

In the present embodiment, the upper portion of the economizer 40 is connected to the cooling inlet 14 of the compressor 10 through the first pipeline 50, because the pressure at the magnetic suspension bearing and the motor rotor in the compressor 10 is lower than the pressure in the economizer 40, the medium-temperature and medium-pressure refrigerant gas at the upper portion of the economizer 40 enters the compressor 10 through the pressure difference therebetween to cool the magnetic suspension bearing and the motor rotor with higher temperature in the compressor 10, and the cooled gas is connected to the evaporator 20 through the cooling outlet 15 at the rear end of the motor, that is, at the rear end of the compressor 10, and returns to the evaporator 20. Meanwhile, when the temperature rise of the magnetic suspension bearing or the motor rotor in the compressor 10 is within a set range, the first normally closed solenoid valve 70 is in a closed state, the second pipeline 60 is not communicated, and the compressor 10 is cooled by gaseous refrigerant only through the first pipeline 50, so that the problem that liquid accumulation in the compressor is damaged by impeller liquid impact or interference is caused to stable suspension of the rotor is solved, and the safety and the stability of the operation of the compressor are improved.

When the temperature rise of the magnetic suspension bearing or the motor rotor in the compressor 10 abnormally exceeds the limit, the first normally closed solenoid valve 70 is opened, the second pipeline 60 is communicated, the supercooled liquid refrigerant from the bottom of the condenser 30 flows to the first pipeline 50 through the second pipeline 60, and is mixed with the gas refrigerant from the economizer 40 to enter the compressor 10 through the cooling inlet 14 on the compressor 10, so that the magnetic suspension bearing and the motor rotor are cooled together.

In this embodiment, the refrigerant gas from the medium-pressure economizer 40 is used as a cooling means for normal operation, and the refrigerant liquid from the high-pressure condenser 30 is used as an auxiliary cooling source for emergency cooling when the temperature of the bearing and the motor rotor abnormally rises, so as to ensure the cooling effect and further improve the reliability of the operation of the compressor 10.

In this embodiment, the check valve 80 is disposed on the first pipeline 50, the check valve 80 is located upstream of a connection point of the first pipeline 50 and the second pipeline 60, that is, the check valve 80 is closer to the cooling gas outlet 44 of the economizer 40 than the connection point, the check valve 80 allows fluid to pass in a direction from the economizer 40 to the compressor 10, and is stopped in the opposite direction, when the second pipeline 60 is connected, the refrigerant liquid in the second pipeline 60 can be prevented from entering the economizer 40 along the first pipeline 50. Once the refrigerant liquid in the second line 60 enters the economizer 40, it may enter the compressor 10 through the make-up air outlet 43 of the economizer 40 and the make-up air inlet 13 of the compressor 10, causing the make-up air to carry liquid and damage the compressor 10, and at the same time, reducing the flow rate of the cooling liquid in the second line 60 and deteriorating the cooling effect.

In this embodiment, each of the first pipeline 50 and the second pipeline 60 may be provided with a flow regulating valve to correspondingly regulate the flow rate of the cooling fluid in the first pipeline 50 and the flow rate of the cooling fluid in the second pipeline 60, and the flow regulating valves may be manual valves or electronic expansion valves.

In order to improve the accuracy and the automation degree of controlling the temperatures of the magnetic suspension bearing and the motor rotor in the compressor 10, the magnetic suspension air conditioning unit in this embodiment further includes a controller (not shown), temperature sensors (not shown) are disposed at the magnetic suspension bearing and the motor rotor, and the temperature sensors and the first normally closed solenoid valve 70 are both in communication connection with the controller. As long as the temperature of either the motor rotor or the magnetic suspension bearing is greater than the warning value, the controller controls the first normally closed solenoid valve 70 on the second pipeline 60 to open, so that the second pipeline 60 is communicated, and liquid refrigerant auxiliary cooling is performed; when the temperatures of the motor rotor and the magnetic suspension bearing are both smaller than the safety threshold (the safety threshold is smaller than the warning value), the first normally closed solenoid valve 70 is closed, the second pipeline 60 is disconnected, and the gas refrigerant is cooled only through the economizer 40.

Alternatively, the on-off of the second pipeline 60 can be controlled by detecting the elongation of the rotating shaft of the magnetic suspension bearing. At this time, the magnetic suspension air conditioning unit still further includes a controller, a displacement sensor (not shown) for detecting the elongation of the bearing rotating shaft is arranged at the magnetic suspension bearing, and the displacement sensor and the first normally closed solenoid valve 70 are both in communication connection with the controller. When the elongation of the rotating shaft of the magnetic suspension bearing is greater than the warning value, the controller controls the first normally closed solenoid valve 70 on the second pipeline 60 to be opened, so that the second pipeline 60 is communicated, and the liquid refrigerant is used for auxiliary cooling; when the elongation of the rotating shaft of the magnetic suspension bearing is smaller than the safety threshold (the safety threshold is smaller than the warning value), the first normally closed solenoid valve 70 is closed, the second pipeline 60 is disconnected, and the gas refrigerant is cooled only through the economizer 40.

In the first embodiment, a gas outlet 34 is disposed at an upper portion of the condenser 30, a gas inlet 24 is disposed on the evaporator 20, the gas outlet 34 of the condenser 30 is connected to the gas inlet 24 of the evaporator 20 through a bypass line 110, an electric control valve 120 is disposed on the bypass line 110 for controlling on/off and opening of the bypass line 110, when the electric control valve 120 is closed, the bypass line 110 is disconnected, when the electric control valve 120 is opened, the bypass line 110 is connected, at this time, the gaseous refrigerant at the upper portion of the condenser 30 can be introduced into the evaporator 20, so as to reduce the internal pressure of the condenser 30, thereby reducing the possibility of surge of the air conditioning unit, and by adjusting the opening of the electric control valve 120, the flow rate of the gaseous refrigerant flowing through the bypass line 110 can be adjusted.

EXAMPLE III

Referring to fig. 9 and 10, in this embodiment, on the basis of the second embodiment, a second auxiliary refrigerant liquid outlet 16 is further disposed on the compressor 10, the second auxiliary refrigerant liquid outlet 16 is connected to the evaporator 20 through a third pipeline 90, and a second normally closed solenoid valve 100 is disposed on the third pipeline 90 and is used for controlling on/off of the third pipeline 90. Through setting up third pipeline 90 and second normally closed solenoid valve 100, then when second pipeline 60 intercommunication carries out refrigerant liquid auxiliary cooling, second normally closed solenoid valve 100 can open and make third pipeline 90 intercommunication, as the supplementary drainage pipeline during liquid cooling, avoids compressor 10 hydrops too much, reduces the possibility of compressor 10 hydrops.

The second normally closed solenoid valve 100 is controlled in linkage with the first normally closed solenoid valve 70 on the second pipeline 60, and both are opened or closed synchronously, so that the amount of the liquid refrigerant in the compressor 10 can be controlled more accurately.

In the foregoing description of embodiments, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The above are only embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. A magnetic suspension air conditioning unit is characterized in that: comprises a compressor, an evaporator, a condenser and an economizer; a magnetic suspension bearing and a motor rotor are arranged in the compressor, an air exhaust port of the compressor is connected with an air inlet of the condenser, a liquid outlet of the condenser is connected with a liquid inlet of the economizer, a liquid outlet of the economizer is connected with a liquid inlet of the evaporator, an air outlet of the evaporator is connected with an air suction port of the compressor, and an air supply outlet of the economizer is connected with an air supply inlet of the compressor; the upper portion of economizer is equipped with the cooling gas export, be equipped with cooling entry and cooling export on the compressor, be equipped with the cooling return inlet on the evaporimeter, the cooling gas export of economizer with the cooling entry of compressor passes through first tube coupling, the cooling export of compressor with the cooling return inlet of evaporimeter is connected.

2. The magnetic levitation air conditioning unit as recited in claim 1, wherein: and a stop valve is arranged on a cooling gas outlet of the economizer.

3. The magnetic levitation air conditioning unit as recited in claim 1, wherein: the bottom of the condenser is provided with a first auxiliary refrigerant liquid outlet, the first auxiliary refrigerant liquid outlet is connected with the first pipeline through a second pipeline, and the second pipeline is provided with a first normally closed electromagnetic valve.

4. The maglev air-conditioning unit of claim 3, wherein: and the first pipeline is provided with a check valve for preventing the refrigerant liquid in the second pipeline from entering the economizer along the first pipeline.

5. The magnetic levitation air conditioning unit as recited in claim 3, wherein: and flow regulating valves are arranged on the first pipeline and the second pipeline respectively so as to correspondingly regulate the flow of the cooling fluid.

6. The magnetic levitation air conditioning unit as recited in claim 3, wherein: the compressor is provided with a second auxiliary refrigerant liquid outlet, the second auxiliary refrigerant liquid outlet is connected with the evaporator through a third pipeline, and a second normally closed solenoid valve is arranged on the third pipeline and used for controlling the on-off of the third pipeline.

7. The magnetic levitation air conditioning unit as recited in claim 6, wherein: the first normally closed electromagnetic valve and the second normally closed electromagnetic valve are opened or closed synchronously.

8. The maglev air-conditioning unit of claim 3, wherein: the magnetic suspension air conditioning unit further comprises a controller, temperature sensors are arranged at the magnetic suspension bearing and the motor rotor, and the temperature sensors and the first normally closed solenoid valve are in communication connection with the controller.

9. The maglev air-conditioning unit of claim 3, wherein: the magnetic suspension air conditioning unit further comprises a controller, a displacement sensor used for detecting the elongation of a bearing rotating shaft is arranged at the magnetic suspension bearing, and the displacement sensor and the first normally closed electromagnetic valve are in communication connection with the controller.

10. The magnetic levitation air conditioning unit as recited in claim 1, wherein: the upper portion of condenser is equipped with the gas outlet, be equipped with gas inlet on the evaporimeter, the gas outlet of condenser with gas inlet on the evaporimeter passes through the bypass pipeline and connects, be equipped with electric control valve on the bypass pipeline and be used for controlling bypass pipeline's break-make and aperture.

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