CN218096660U - Refrigerant circulation system and air conditioning equipment - Google Patents
Refrigerant circulation system and air conditioning equipment Download PDFInfo
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- CN218096660U CN218096660U CN202222300555.0U CN202222300555U CN218096660U CN 218096660 U CN218096660 U CN 218096660U CN 202222300555 U CN202222300555 U CN 202222300555U CN 218096660 U CN218096660 U CN 218096660U
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Abstract
The utility model relates to a refrigerant circulation system and air conditioning equipment, refrigerant circulation system including the compressor that has the gas suspension bearing, be used for condensing the condenser of the refrigerant after the compressor compression, be used for evaporating the evaporimeter of the refrigerant after the condensation in the condenser and be used for carrying the air feed system of gaseous state refrigerant to the gas suspension bearing, air feed system includes: a gaseous refrigerant flow path including an inlet end communicated with the condenser to introduce the gaseous refrigerant and an outlet end for outputting the gaseous refrigerant; the gas storage tank comprises a gas inlet communicated with the outlet end of the gaseous refrigerant flow path and a gas outlet used for providing the gaseous refrigerant for the gas suspension bearing; the one-way valve is arranged in a gaseous refrigerant flow path, the inlet end of the one-way valve is communicated with the condenser, and the outlet end of the one-way valve is communicated with the air storage tank; the first control valve is arranged in a pipeline between the condenser and the evaporator to control the on-off of the condenser and the evaporator; and the controller is in signal connection with the first control valve so as to close the first control valve after the compressor is stopped.
Description
Technical Field
The utility model relates to the field of refrigeration technology, particularly, relate to a refrigerant circulating system and air conditioning equipment.
Background
Centrifugal water chilling units are widely applied to industrial, commercial and residential buildings at present, and the reliability of the centrifugal water chilling units is widely accepted by the market. Generally, a compressor of a centrifugal water chilling unit adopts an oil lubrication bearing, a magnetic suspension bearing and an air suspension bearing, the air suspension bearing which is just started in the refrigeration industry is divided into dynamic pressure air suspension and static pressure air suspension, the former is mature and is put into the market in a large amount compared with the latter, and the static pressure air suspension also becomes a competitive focus in the industry.
The bearing is an easily-worn object in a mechanical part, the replacement and maintenance work is inconvenient, the abrasion of the bearing is avoided or reduced in the running process of the compressor, the service life of the compressor is effectively prolonged, the mechanical loss can be reduced, and the mechanical efficiency is improved. The oil lubricates the bearing compressor, the lubricating oil with high cleanliness enters each bearing of the compressor through the high-level oil tank, and a dynamic pressure oil film is formed in the bearing to support the rotor. When the unit is in a normal shutdown state or a fault shutdown state, after the unit sends a shutdown signal, the oil tank oil pump is delayed to be closed to continue to provide lubricating oil for the bearing until the compressor completely stops rotating; when the power is cut off abnormally or the oil pump stops due to failure, the lubricating oil remained in the high-level oil tank can still play a role in reducing the friction of the bearing although the oil pump stops working, and the lubricating oil has a certain protection effect on the bearing.
The electromagnetic bearing compressor utilizes the principle of electromagnetism generation to suspend a motor shaft by magnetic force. When the unit is in a normal shutdown state or a fault shutdown state, after the unit sends a shutdown signal, the unique electric control system continues to perform suspension control on the motor shaft until the compressor completely stops; when the motor is stopped in abnormal power failure, the unique power generation device in the electromagnetic bearing compressor continues to supply power to the electromagnetic device by utilizing the rotation of the motor when the motor is stopped, so that the motor shaft still has magnetic force to suspend.
At present, a large number of related patent documents mention a scheme of static pressure air suspension bearing suspension, a scheme of taking liquid and supplying liquid by a condenser and an evaporator, a scheme of taking gas and supplying gas by a condenser and a compressor, or an auxiliary system is adopted, and gas taken by a bearing is pressurized and heated by a refrigerant pump and electric heating and is stored in a gas storage tank. The prior art scheme does not solve the problem of how to continue to ensure the air supply of the bearing when a refrigerant circulating system of a compressor adopting the air suspension bearing is stopped or an air supply system fails.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a can be to refrigerant circulating system and air conditioning equipment of gas suspension bearing air feed after refrigerant circulating system shuts down.
According to the utility model discloses an aspect of embodiment, the utility model provides a refrigerant circulation system, refrigerant circulation system including the compressor that has gas suspension bearing, be used for condensing the condenser of the refrigerant after the compressor compression, be used for evaporating the evaporimeter of the refrigerant after the condensation in the condenser and be used for carrying gaseous state refrigerant's air supply system to gas suspension bearing, air supply system includes:
a gaseous refrigerant flow path including an inlet end communicated with the condenser to introduce the gaseous refrigerant and an outlet end for outputting the gaseous refrigerant;
the gas storage tank comprises a gas inlet communicated with the outlet end of the gaseous refrigerant flow path and a gas outlet used for providing the gaseous refrigerant for the gas suspension bearing;
the one-way valve is arranged in a gaseous refrigerant flow path, the inlet end of the one-way valve is communicated with the condenser, and the outlet end of the one-way valve is communicated with the air storage tank;
the first control valve is arranged in a pipeline between the condenser and the evaporator to control the on-off of the condenser and the evaporator;
and the controller is in signal connection with the first control valve so as to close the first control valve after the compressor is stopped.
In some embodiments, the gas supply system further comprises:
a refrigerant pump arranged in the gaseous refrigerant flow path to convey the gaseous refrigerant in the condenser to the gas storage tank;
the controller is in signal connection with the refrigerant pump and is configured to control the refrigerant pump to stop after the compressor stops for a predetermined time, so as to provide gaseous refrigerant to the air suspension bearing before the compressor completely stops rotating.
In some embodiments, the gas supply system further comprises:
the liquid refrigerant flow path comprises an inlet end for introducing the liquid refrigerant condensed by the condenser and an outlet end for outputting the liquid refrigerant;
the liquid storage tank is communicated with the outlet end of the liquid refrigerant flow path and is used for outputting a gaseous refrigerant;
and the communication flow path comprises an inlet end communicated with the liquid storage tank and an outlet end communicated with the gas storage tank.
In some embodiments, the gas supply system further comprises:
the second control valve is arranged in the liquid refrigerant flow path;
a third control valve provided in the communication flow path;
the controller is in signal connection with the second control valve and the third control valve respectively so as to open the second control valve and close the third control valve when the refrigerant circulating system works to enable the liquid storage tank to store refrigerant; or the controller is configured to control the third control valve to be opened when the gaseous refrigerant flow path is failed so that the liquid storage tank provides the gaseous refrigerant for the gas storage tank.
In some embodiments, the air supply system further includes a heating component for heating the refrigerant in the liquid storage tank to vaporize the refrigerant.
In some embodiments, the heating element comprises an electric heating element.
In some embodiments, the gas supply system further comprises:
the liquid storage tank pressure detection component is used for detecting the pressure P3 of the refrigerant in the liquid storage tank;
the controller is in signal connection with the liquid storage tank pressure detection part and the heating part respectively so as to control the heating part to heat the refrigerant in the liquid storage tank when the pressure P3 of the refrigerant in the liquid storage tank is smaller than a preset condition.
In some embodiments, the controller is configured to control the heating component to heat the refrigerant in the liquid storage tank when the pressure P3 of the refrigerant in the liquid storage tank is less than a predetermined condition when the refrigerant circulation system is in operation.
In some embodiments, the air supply system further comprises an air supply pressure detection unit for detecting a pressure P4 of the gaseous refrigerant supplied to the aero-levitation bearing, and the controller is in signal connection with the air supply pressure detection unit to determine whether the pressure P3 of the refrigerant in the liquid storage tank is less than a predetermined condition, wherein the predetermined condition is a sum of the pressure P4 and a predetermined pressure difference P.
In some embodiments, the inlet end of the liquid refrigerant flow path is in communication with the condenser; or the inlet end of the liquid refrigerant flow path is communicated with the evaporator.
In some embodiments, the coolant circulation system further includes an uninterruptible power supply for supplying power to the gas supply system.
In some embodiments, the refrigerant circulation system further includes a check valve disposed in the conduit between the compressor and the condenser, an inlet end of the check valve being in communication with the compressor discharge port, and an outlet end of the check valve being in communication with the condenser.
According to the utility model discloses an on the other hand still provides an air conditioning equipment, and air conditioning equipment includes foretell refrigerant circulation system.
According to another aspect of the present invention, there is provided a method for controlling a refrigerant circulation system, in some embodiments, the method includes:
after the compressor of the refrigerant circulating system is stopped, the first control valve is controlled to be closed so as to prevent or slow down the pressure relief of the condenser.
In some embodiments, the control method further comprises:
after the compressor stops for a preset time, the refrigerant pump in the gaseous refrigerant flow path is controlled to stop so as to provide gaseous refrigerant to the air suspension bearing before the compressor completely stops rotating; or
And controlling the liquid storage tank to provide the gaseous refrigerant to the air storage tank when the gaseous refrigerant flow path is in failure.
Use the technical scheme of this application, the compressor shuts down the gas pressure in the first control valve and the check valve that close after the machine is shut down can keep the condenser, prevents or slows down the condenser pressure release, is favorable to after the machine is shut down and provides gaseous refrigerant to the air suspension bearing with the complete stop motion.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments of the invention, which proceeds with reference to 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, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of a refrigerant circulation system according to an embodiment of the present invention; and
fig. 2 is a schematic structural diagram of a refrigerant circulation system according to another embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
As shown in fig. 1, the refrigerant circulation system of the present embodiment includes a compressor 1 having an air bearing, a condenser 4 for condensing a refrigerant compressed by the compressor 1, an evaporator 21 for evaporating the refrigerant condensed by the condenser 4, and an air supply system for supplying a gaseous refrigerant to the air bearing, wherein the air supply system includes a gaseous refrigerant flow path 23, an air tank 9, a check valve 8, a first control valve 19, and a controller.
The gaseous refrigerant flow path 23 includes an inlet end communicating with the condenser 4 to introduce the gaseous refrigerant and an outlet end for outputting the gaseous refrigerant; the gas storage tank 9 comprises a gas inlet communicated with the outlet end of the gaseous refrigerant flow path 23 and a gas outlet used for providing gaseous refrigerant for the gas suspension bearing; the check valve 8 is arranged in the gaseous refrigerant flow path 23, the inlet end of the check valve 8 is communicated with the condenser 4, and the outlet end gas storage tank 9 of the check valve 8 is communicated; a first control valve 19 is arranged in a pipeline between the condenser 4 and the evaporator 21 to control the on-off of the condenser 4 and the evaporator 21; the controller is in signal connection with the first control valve 19 to close the first control valve 19 after the compressor 1 is stopped.
In this embodiment, the first control valve 19 and the check valve 8 closed after the compressor 1 is stopped can maintain the gas pressure in the condenser 4, and prevent or slow down the pressure relief of the condenser 4, which is beneficial to providing the gaseous refrigerant to the air suspension bearing after the compressor is stopped and before the compressor completely stops moving.
In some embodiments, the air bearing comprises a hydrostatic air bearing.
In some embodiments, the gas supply system further includes a refrigerant pump 7, and the refrigerant pump 7 is disposed in the gaseous refrigerant flow path 23 to deliver the gaseous refrigerant in the condenser 4 to the gas tank 9; the controller is in signal connection with the refrigerant pump 7 and is configured to control the refrigerant pump 7 to stop after the compressor 1 stops for a preset time, so that gaseous refrigerant is provided to the air suspension bearing before the compressor 1 completely stops rotating, and more refrigerant in the condenser 4 is conveyed to the air storage tank 9 and the air suspension bearing.
The gas supply system further comprises a liquid refrigerant flow path 24, a liquid storage tank 10 and a communication pipeline 25. The liquid refrigerant flow path 24 includes an inlet end for introducing the liquid refrigerant condensed by the condenser 4 and an outlet end for outputting the liquid refrigerant; the liquid storage tank 10 is communicated with the outlet end of the liquid refrigerant flow path 24 and is used for outputting a gaseous refrigerant; the communication flow path 25 includes an inlet end communicating with the reservoir tank 10 and an outlet end communicating with the gas tank 9.
The gas supply system also comprises a second control valve 18 and a third control valve 14, wherein the second control valve 18 is arranged in the liquid refrigerant flow path 24; the third control valve 14 is provided in the communication flow path 25; the controller is in signal connection with the second control valve 18 and the third control valve 14 respectively, so that the second control valve 18 is opened and the third control valve 14 is closed when the refrigerant circulating system works, and the liquid storage tank 10 stores the refrigerant; or the controller may be configured to control the third control valve 14 to open to allow the accumulator 10 to provide gaseous refrigerant to the reservoir 9 in the event of a failure of the gaseous refrigerant path 23 (e.g., a refrigerant pump failure).
The gas supply flow path further includes a liquid level detection unit 12 for detecting a liquid level of the liquid storage tank 10, and the controller is in signal connection with the liquid level detection unit 12 to close the second control valve 18 after the liquid level in the liquid storage tank 10 reaches a predetermined value.
The air supply system further includes a heating member 11 for heating the refrigerant in the liquid storage tank 10 to gasify the refrigerant. In some embodiments, the heating member 11 comprises an electric heating member.
The gas supply system also comprises a liquid storage tank pressure detection part 13, wherein the liquid storage tank pressure detection part 13 is used for detecting the pressure P3 of the refrigerant in the liquid storage tank 10; the controller is in signal connection with the liquid storage tank pressure detection part 13 and the heating part 11 respectively, so as to control the heating part 11 to heat the refrigerant in the liquid storage tank 10 when the pressure P3 of the refrigerant in the liquid storage tank 10 is smaller than a preset condition.
In some embodiments, the controller is configured to control the heating component 11 to heat the refrigerant in the liquid storage tank 10 when the pressure P3 of the refrigerant in the liquid storage tank 10 is less than a predetermined condition when the refrigerant circulation system is in operation. In other embodiments, the controller is configured to control the heating member 11 to heat the refrigerant in the tank 10 when the pressure P3 of the refrigerant in the tank 10 is less than a predetermined condition when the gaseous refrigerant flow path 23 fails.
The gas supply system also comprises a gas supply pressure detection part 2 for detecting the pressure of the gaseous refrigerant supplied to the gas suspension bearing, and the controller is in signal connection with the gas supply pressure detection part 2 to judge whether the pressure P3 of the refrigerant in the liquid storage tank 10 is smaller than a preset condition, wherein the preset condition is the sum of P4 and a preset pressure difference P.
In the present embodiment, the inlet end of the liquid refrigerant flow path 24 is communicated with the condenser 4; in other embodiments, as shown in fig. 2, the inlet end of the liquid refrigerant path 24 is connected to the evaporator 21, specifically, when the bottom of the evaporator 21 is lower than the condenser 4, the liquid tank 10 will be supplied by the evaporator 21 by gravity, wherein the energy storage control and the air supply control during shutdown are not changed.
The refrigerant circulating system also comprises an Uninterruptible Power Supply (UPS) for supplying power to the gas supply system, and the gas supply system adopts the UPS for independent power supply, so that the gas supply system can still normally work when the unit is abnormally powered off.
In some embodiments, the refrigerant circulation system further includes a check valve 3 disposed in a pipeline between the compressor 1 and the condenser 4, an inlet end of the check valve 3 is communicated with a discharge port of the compressor 1, and an outlet end of the check valve 3 is communicated with the condenser 4.
The refrigerant circulation system further includes a condenser pressure detecting unit 5 for detecting a pressure of the refrigerant in the condenser 4, a tank pressure detecting unit 15 for detecting a pressure of the refrigerant in the tank 9, and an evaporator pressure detecting unit 22 for detecting a pressure of the refrigerant in the evaporator 21.
The refrigerant cycle further comprises a first filter 6 arranged in the gaseous refrigerant flow path 23, a second filter 16 arranged in the flow path between the liquid reservoir 9 and the gas suspension bearings of the compressor 1, and a third filter 17 arranged in the liquid refrigerant flow path 24.
According to the utility model discloses an on the other hand still provides an air conditioning equipment, and this air conditioning equipment includes foretell refrigerant circulation system.
According to the utility model discloses an on the other hand still provides a refrigerant circulation system's control method, and control method includes:
after the compressor 1 of the refrigerant cycle system is stopped, the first control valve 19 is controlled to close to prevent or slow down the pressure relief of the condenser 4.
Before the refrigerant circulating system operates, an air supply pressure difference value P0 needs to be set, wherein P0= the difference value between the pressure P2 of the refrigerant in the air storage tank 9 and the pressure P4 of the gaseous refrigerant supplied to the air suspension bearing; or before the refrigerant circulating system operates, a set operation air supply pressure difference target value P is set, the minimum air supply pressure difference is P6, wherein P6 is more than or equal to P0 and less than or equal to P.
When the refrigerant circulating system is stopped, the stopping system respectively operates a stopping control mode 1 and a stopping control mode 2 according to different stopping reasons. Before the refrigerant circulating system is started, the second control valve 18 is opened, the third control valve 14 is in a normally closed state, liquid at the bottom of the condenser 4 enters the liquid storage tank 10 under the action of gravity, and when the liquid level reaches a preset height, the second control valve 18 is closed. Meanwhile, when the difference between the pressure P3 of the refrigerant in the liquid storage tank 10 and the pressure P4 of the gaseous refrigerant supplied to the air suspension bearing is smaller than P6, the heating element 11 is controlled to be turned on, and when the difference between the pressure P3 in the liquid storage tank 10 and the pressure P4 of the gaseous refrigerant supplied to the air suspension bearing is larger than P, the heating element 11 is turned off, so that the difference between P3 and P4 is maintained between P0 and P6, and the liquid storage tank still maintains the pressure control after the compressor is started.
The control method further comprises the following steps:
shutdown control mode 1: and after the compressor 1 is stopped for a preset time, controlling the refrigerant pump 7 in the gaseous refrigerant flow path to stop so as to provide the gaseous refrigerant to the air suspension bearing before the compressor 1 completely stops rotating. When the unit is normally stopped, fault-stopped or abnormally power-off stopped, the air supply flow path refrigerant pump of the variable-frequency refrigerant pump 7 is closed in a delayed manner, and the variable-frequency refrigerant pump 7 completely stops working normally before the compressor 1 stops; meanwhile, the first control valve 19 of the refrigeration flow path of the static pressure gas suspension unit is closed, so that the gas in the condenser 4 is kept in a state before the stop to the maximum extent, and the phenomenon that the pressure of the condenser is rapidly released and the gas supply pressure is greatly changed and the pressure is unstable due to the rapid adjustment of a refrigerant pump in a short time is avoided. Therefore, when the unit is stopped, stable gas can still be normally provided for the bearing.
In the shutdown control mode 2, when the gaseous refrigerant passage 23 fails (for example, when the refrigerant pump 7 fails), the receiver tank 10 is controlled to supply the gaseous refrigerant to the gas tank 9. When the refrigerant pump 7 is out of order to cause the unit to stop, the gas refrigerant flow path 23 where the variable frequency refrigerant pump 7 is located is abnormal in gas supply. At this time, the third control valve 14 is opened, and the gas at the target value P of the gas supply pressure difference flows from the top of the liquid storage tank to the gas storage tank, and supplies gas to the bearing together with the residual gas in the gas storage tank before shutdown, so as to avoid insufficient pressure in the gas storage tank after shutdown. After the compressor is completely stopped, the third control valve 14 is closed, and the second control valve 18 is opened, so that the liquid refrigerant is stored in the liquid storage tank 10. Before the liquid storage tank 10 completes the energy storage control, the compressor 1 is prohibited to be started, so that the problem that the refrigerant pump fails after the unit is started in a short time and the energy storage flow path cannot provide normal air supply pressure is avoided. Through the control, the shutdown control mode 1 and the shutdown control mode 2 are matched with each other, so that the bearing is supplied with air all the time when the static pressure air suspension compressor is in normal, fault shutdown, abnormal power failure or refrigerant pump fault shutdown, and the unit is ensured to operate reliably and stably.
The above description is only an exemplary embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (13)
1. The refrigerant circulating system is characterized by comprising a compressor (1) with an air suspension bearing, a condenser (4) used for condensing a refrigerant compressed by the compressor (1), an evaporator (21) used for evaporating the refrigerant condensed in the condenser (4) and an air supply system used for conveying the gaseous refrigerant to the air suspension bearing, wherein the air supply system comprises:
a gaseous refrigerant flow path (23) including an inlet end communicating with the condenser (4) to introduce a gaseous refrigerant and an outlet end for outputting the gaseous refrigerant;
the gas storage tank (9) comprises a gas inlet communicated with the outlet end of the gaseous refrigerant flow path (23) and a gas outlet used for providing gaseous refrigerant for the gas suspension bearing;
the check valve (8) is arranged in the gaseous refrigerant flow path (23), the inlet end of the check valve (8) is communicated with the condenser (4), and the outlet end of the check valve (8) is communicated with the gas storage tank (9);
the first control valve (19) is arranged in a pipeline between the condenser (4) and the evaporator (21) to control the on-off of the condenser (4) and the evaporator (21);
a controller in signal connection with the first control valve (19) to close the first control valve (19) after shutdown of the compressor (1).
2. The refrigerant circulation system of claim 1, wherein the air supply system further comprises:
a refrigerant pump (7) provided in the gaseous refrigerant passage (23) to feed the gaseous refrigerant in the condenser (4) to the gas tank (9);
the controller is in signal connection with the refrigerant pump (7) and is configured to control the refrigerant pump (7) to stop after the compressor (1) stops for a predetermined time, so as to provide gaseous refrigerant to the aerostatic bearing before the compressor (1) completely stops rotating.
3. The refrigerant circulation system as claimed in claim 1, wherein the air supply system further comprises:
the liquid refrigerant flow path (24) comprises an inlet end for introducing the liquid refrigerant condensed by the condenser (4) and an outlet end for outputting the liquid refrigerant;
the liquid storage tank (10) is communicated with the outlet end of the liquid refrigerant flow path (24) and is used for outputting a gaseous refrigerant;
and the communication flow path (25) comprises an inlet end communicated with the liquid storage tank (10) and an outlet end communicated with the gas storage tank (9).
4. The refrigerant circulation system as claimed in claim 3, wherein the air supply system further comprises:
a second control valve (18) provided in the liquid refrigerant passage (24);
a third control valve (14) provided in the communication flow path (25);
the controller is in signal connection with the second control valve (18) and the third control valve (14) respectively, so that the second control valve (18) is opened and the third control valve (14) is closed when the refrigerant circulating system works, and the liquid storage tank (10) stores refrigerant; or the controller is configured to control the third control valve (14) to be opened when the gaseous refrigerant flow path (23) is failed, so that the liquid storage tank (10) provides the gaseous refrigerant to the liquid storage tank (9).
5. The refrigerant circulation system according to claim 3, wherein the air supply system further comprises a heating member (11) for heating the refrigerant in the liquid storage tank (10) to vaporize the refrigerant.
6. The refrigerant circulation system according to claim 5, wherein the heating member (11) comprises an electric heating member.
7. The refrigerant circulation system as claimed in claim 5, wherein the air supply system further comprises:
a liquid storage tank pressure detection unit (13) for detecting the pressure P3 of the refrigerant in the liquid storage tank (10);
the controller is in signal connection with the liquid storage tank pressure detection part (13) and the heating part (11) respectively, so that when the pressure P3 of the refrigerant in the liquid storage tank (10) is smaller than a preset condition, the heating part (11) is controlled to heat the refrigerant in the liquid storage tank (10).
8. The refrigerant circulation system according to claim 7, wherein the controller is configured to control the heating member (11) to heat the refrigerant in the liquid storage tank (10) when the pressure P3 of the refrigerant in the liquid storage tank (10) is less than a predetermined condition while the refrigerant circulation system is in operation.
9. The refrigerant cycle system according to claim 8, wherein the air supply system further comprises an air supply pressure detecting unit (2) for detecting a pressure P4 of the gaseous refrigerant supplied to the air suspension bearing, and the controller is in signal connection with the air supply pressure detecting unit (2) to determine whether a pressure P3 of the refrigerant in the liquid storage tank (10) is less than a predetermined condition, wherein the predetermined condition is a sum of P4 and a predetermined pressure difference P.
10. The refrigerant circulation system according to claim 3, wherein the inlet end of the liquid refrigerant flow path (24) is in communication with the condenser (4); or the inlet end of the liquid refrigerant flow path (24) is communicated with the evaporator (21).
11. The refrigerant circulation system of claim 1, further comprising an uninterruptible power supply for supplying power to the gas supply system.
12. The refrigerant circulation system according to claim 1, further comprising a check valve (3) disposed in a pipeline between the compressor (1) and the condenser (4), an inlet end of the check valve (3) being in communication with a discharge port of the compressor (1), and an outlet end of the check valve (3) being in communication with the condenser (4).
13. An air conditioning apparatus, characterized by comprising the refrigerant circulation system according to any one of claims 1 to 12.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202222300555.0U CN218096660U (en) | 2022-08-31 | 2022-08-31 | Refrigerant circulation system and air conditioning equipment |
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| CN202222300555.0U CN218096660U (en) | 2022-08-31 | 2022-08-31 | Refrigerant circulation system and air conditioning equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115247905A (en) * | 2022-08-31 | 2022-10-28 | 珠海格力电器股份有限公司 | Refrigerant circulation system, air conditioning equipment and refrigerant circulation system control method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115247905A (en) * | 2022-08-31 | 2022-10-28 | 珠海格力电器股份有限公司 | Refrigerant circulation system, air conditioning equipment and refrigerant circulation system control method |
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