Compressor cooling pipeline structure of air suspension centrifugal water chilling unit

Abstract

The utility model discloses a compressor cooling pipeline structure of an air suspension centrifugal water chilling unit, which belongs to the technical field of refrigeration equipment and comprises a condenser, an economizer communicated with the condenser, an evaporator communicated with the economizer, a compressor communicated with the evaporator, and the compressor communicated with the condenser to form a refrigeration cycle loop. The cooling branch comprises a first pipeline, one end of the first pipeline communicates with the condenser, the end, away from the condenser, of the first pipeline communicates with the compressor, the compressor communicates with a second pipeline, and the end, away from the compressor, of the second pipeline communicates with the evaporator, so that the compressor is cooled. The system is simple in structure, complex external cooling equipment and auxiliary systems such as a cooling tower and a cooling water pump are not needed, the number and complexity of system components are reduced, the fault risk and maintenance cost are reduced, and the reliability and operation efficiency of a unit are improved.

Description

Technical Field

[0001] This utility model belongs to the field of refrigeration equipment technology, and in particular relates to a cooling pipe structure for a compressor of an air-suspended centrifugal chiller unit. Background Technology

[0002] Air-suspension centrifugal refrigeration compressors represent a significant development direction in refrigeration technology. Their rotors are supported by air-suspension bearings, eliminating the need for mechanical contact and enabling high-speed, low-power operation, thus significantly improving refrigeration system efficiency. Furthermore, the dynamic pressure air-suspension bearings require no external air supply, simplifying the system structure. Traditional motor cooling methods have shortcomings. For example, methods that directly draw refrigerant from the condenser outlet to the cooling channel within the motor housing suffer from drawbacks. Due to the large pressure difference between the condenser outlet and the motor cavity, the refrigerant rapidly expands into a two-phase state, resulting in high dryness, low heat load, poor cooling performance, and high refrigerant consumption.

[0003] Therefore, it is urgent to design a cooling pipe structure for the compressor of an air-suspended centrifugal chiller unit to solve the problems mentioned above that lead to poor cooling effect and high refrigerant consumption. Utility Model Content

[0004] To address the technical problems mentioned in the background art, which result in poor cooling performance and high refrigerant consumption, a cooling pipe structure for a compressor in an air-suspended centrifugal chiller unit is provided to solve the aforementioned problems.

[0005] To achieve the above objectives, the specific technical solution for the cooling pipe structure of the compressor in the air-suspension centrifugal chiller unit of this utility model is as follows:

[0006] A cooling pipe structure for a centrifugal chiller compressor includes a condenser, an economizer connected to the condenser, an evaporator connected to the economizer, and a compressor connected to the evaporator. The compressor and condenser are connected to form a refrigeration cycle. The cooling branch includes a first pipe, one end of which is connected to the condenser, and the end of the first pipe away from the condenser is connected to the compressor. A second pipe is connected to the compressor, and the end of the second pipe away from the compressor is connected to the evaporator, thereby cooling the compressor.

[0007] Furthermore, a drying filter is installed on the first pipeline to ensure the purity and stability of the refrigerant in the cooling branch.

[0008] Furthermore, a solenoid valve is installed on the first pipeline. The solenoid valve is located downstream of the drying filter barrel and controls the refrigerant flow in the cooling branch.

[0009] Furthermore, an electronic expansion valve is installed on the first pipeline. The electronic expansion valve is located downstream of the solenoid valve, thereby working with the solenoid valve to precisely control the refrigerant flow in the cooling branch.

[0010] Furthermore, a sight glass is installed on the first pipeline, located between the solenoid valve and the solenoid expansion valve, to observe the refrigerant in the cooling pipeline.

[0011] Furthermore, a reducer is installed on the second pipeline, located close to the compressor, so as to work with the solenoid valve and the electronic expansion valve to control the flow and pressure of the refrigerant.

[0012] Furthermore, a cooling circuit for refrigerant circulation is provided on the compressor.

[0013] Furthermore, the cooling circuit includes a first circuit opened outside the motor cavity of the compressor. The first circuit is connected to the intermediate flow channel between the motor cavity and the main shaft of the compressor. An outlet pipe is also opened on the motor cavity, which is connected to the intermediate flow channel. After the refrigerant enters the motor cavity from the first circuit, it passes through the intermediate flow channel and connects to the outlet pipe, thereby exchanging heat with the compressor.

[0014] Furthermore, an inlet pipeline is installed on the first circuit.

[0015] Furthermore, the first circuit is spirally arranged around the motor cavity.

[0016] The air-suspension centrifugal chiller unit compressor cooling pipe structure of this utility model has the following advantages:

[0017] This utility model has a simple system structure and does not require complex external cooling equipment and auxiliary systems, such as cooling towers and cooling water pumps. This reduces the number and complexity of system components, lowers the risk of failure and maintenance costs, and improves the reliability and operating efficiency of the unit.

[0018] This invention makes full use of the refrigerant. The flow and phase change process of the refrigerant in the pipeline can fully utilize its thermodynamic properties. After cooling the motor, the refrigerant can directly participate in the refrigeration cycle, realizing efficient use of energy and improving the refrigeration performance of the entire unit.

[0019] Through precise design and optimization, this invention can ensure that the motor receives stable and reliable cooling under various operating conditions, adapt to different loads and environmental conditions, guarantee continuous and stable operation of the unit, and reduce the number of shutdowns and maintenance caused by motor overheating. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the cooling pipeline structure of the compressor in the air-suspended centrifugal chiller unit of this utility model;

[0021] Figure 2 This is a schematic diagram of the internal piping structure of the compressor of this utility model;

[0022] The markings in the diagram are as follows: 1. Condenser; 2. Economizer; 3. Evaporator; 4. Compressor; 401. Cooling circuit; 100. First circuit; 200. Intermediate flow channel; 300. Outlet pipe; 400. Inlet pipe; 5. Cooling branch; 501. First pipe; 502. Second pipe; 6. Dryer filter; 7. Solenoid valve; 8. Electronic expansion valve; 9. Sight glass; 10. Reducer. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0024] Those skilled in the art will understand that although some embodiments herein include certain features included in other embodiments but not others, combinations of features from different embodiments are intended to be within the scope of this invention and form different embodiments. For example, in the claims, any of the claimed embodiments can be used in any combination.

[0025] The following is a reference to the appendix. Figure 1 To be continued Figure 2 This invention describes the cooling pipe structure of the compressor in an air-suspended centrifugal chiller unit.

[0026] This utility model provides a cooling pipe structure for a compressor in an air-suspended centrifugal chiller unit, such as... Figure 1 As shown, the system includes a condenser 1, an economizer 2 connected to the condenser 1, an evaporator 3 connected to the economizer 2, and a compressor 4 connected to the evaporator 3. The compressor 4 is connected to the condenser 1, forming a refrigeration cycle. It also includes a cooling branch 5, which includes a first pipe 501. One end of the first pipe 501 is connected to the condenser 1, and the end of the first pipe 501 away from the condenser 1 is connected to the compressor 4. A second pipe 502 is connected to the compressor 4, and the end of the second pipe 502 away from the compressor 4 is connected to the evaporator 3, thereby cooling the compressor 4. Specifically, by optimizing the refrigerant flow path, the cooling efficiency is improved, while the refrigerant consumption is reduced, solving the problem of high refrigerant dryness and low heat load caused by large pressure difference in traditional cooling methods.

[0027] Preferably, a drying filter 6 is provided on the first pipeline 501 to ensure the purity and stability of the refrigerant in the cooling branch 5, thereby ensuring the purity and stability of the refrigerant in the cooling branch 5 and preventing equipment failure caused by impurities or moisture.

[0028] Preferably, a solenoid valve 7 is installed on the first pipeline 501. The solenoid valve 7 is located downstream of the drying filter barrel 6. The solenoid valve 7 controls the refrigerant flow rate of the cooling branch 5. By adjusting the opening of the solenoid valve 7, the refrigerant flow rate can be precisely controlled according to actual needs, which improves the flexibility and controllability of the system.

[0029] Preferably, an electronic expansion valve 8 is installed on the first pipeline 501. The electronic expansion valve 8 is located downstream of the solenoid valve 7, so as to work with the solenoid valve 7 to precisely control the refrigerant flow in the cooling branch 5. Through the fine adjustment of the electronic expansion valve 8, the flow state of the refrigerant can be controlled more accurately. Combined with the solenoid valve 7, dual control of refrigerant flow and pressure can be achieved, further optimizing the cooling effect.

[0030] Preferably, a sight glass 9 is provided on the first pipeline 501. The sight glass 9 is located between the solenoid valve 7 and the solenoid expansion valve to observe the refrigerant in the cooling pipeline, so that the operator can monitor the status of the refrigerant in real time and detect abnormalities in a timely manner.

[0031] Preferably, a reducer 10 is provided on the second pipeline 502. The reducer 10 is located close to the compressor 4, so as to work with the solenoid valve 7 and the electronic expansion valve 8 to control the flow and pressure of the refrigerant. By changing the pipe diameter, the flow state of the refrigerant is optimized.

[0032] As a preferred option, such as Figure 2 As shown, a cooling circuit 401 for refrigerant circulation is provided on the compressor 4. By directly utilizing the refrigerant to cool the inside of the compressor 4, the cooling efficiency is improved.

[0033] Preferably, the cooling circuit 401 includes a first circuit 100 opened outside the motor cavity of the compressor 4. The first circuit 100 is connected to the intermediate flow channel 200 between the motor cavity and the main shaft of the compressor 4. An outlet pipe 300 is also opened on the motor cavity, which is connected to the intermediate flow channel 200. After the refrigerant enters the motor cavity from the first circuit 100, it passes through the intermediate flow channel 200 and connects to the outlet pipe 300, thereby exchanging heat with the compressor 4. This optimizes the flow path of the refrigerant inside the compressor 4. The motor cavity undergoes dual heat exchange, that is, the refrigerant undergoes a first heat exchange with the outside of the motor cavity through the first circuit 100, and a second heat exchange with the inside of the motor cavity through the intermediate flow channel 200. This improves the cooling effect, ensures uniform heat dissipation of all parts of the compressor 4, and prevents local overheating.

[0034] Preferably, the first circuit 100 is provided with an inlet pipe 400, through which the refrigerant enters the first circuit 100.

[0035] Preferably, the first loop 100 is spirally arranged on the motor cavity. The spiral design increases the heat exchange area and further improves the cooling efficiency.

[0036] This utility model has a simple system structure and does not require complex external cooling equipment and auxiliary systems, such as cooling towers and cooling water pumps. This reduces the number and complexity of system components, lowers the risk of failure and maintenance costs, and improves the reliability and operating efficiency of the unit.

[0037] This invention makes full use of the refrigerant. The flow and phase change process of the refrigerant in the pipeline can fully utilize its thermodynamic properties. After cooling the motor, the refrigerant can directly participate in the refrigeration cycle, realizing efficient use of energy and improving the refrigeration performance of the entire unit.

[0038] Through precise design and optimization, this invention can ensure that the motor receives stable and reliable cooling under various operating conditions, adapt to different loads and environmental conditions, guarantee continuous and stable operation of the unit, and reduce the number of shutdowns and maintenance caused by motor overheating.

[0039] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A cooling pipe structure for a compressor in an air-suspension centrifugal chiller unit, characterized in that, It includes a condenser, an economizer connected to the condenser, an evaporator connected to the economizer, a compressor connected to the evaporator, and the compressor is connected to the condenser to form a refrigeration cycle loop. It also includes a cooling branch, which includes a first pipe. One end of the first pipe is connected to the condenser, and the end of the first pipe away from the condenser is connected to the compressor. A second pipe is connected to the compressor, and the end of the second pipe away from the compressor is connected to the evaporator, thereby cooling the compressor.

2. The cooling pipe structure of the air-suspended centrifugal chiller compressor according to claim 1, characterized in that, A dryer filter is installed on the first pipeline to ensure the purity and stability of the refrigerant in the cooling branch.

3. The cooling pipe structure of the compressor in the air-suspended centrifugal chiller unit according to claim 2, characterized in that, A solenoid valve is installed on the first pipeline. The solenoid valve is located downstream of the dryer filter barrel and controls the refrigerant flow in the cooling branch.

4. The cooling pipe structure of the air-suspended centrifugal chiller compressor according to claim 3, characterized in that, An electronic expansion valve is installed on the first pipeline. The electronic expansion valve is located downstream of the solenoid valve, so as to work with the solenoid valve to precisely control the refrigerant flow in the cooling branch.

5. The cooling pipe structure of the air-suspended centrifugal chiller compressor according to claim 4, characterized in that, A sight glass is installed on the first pipeline, located between the solenoid valve and the solenoid expansion valve, to observe the refrigerant in the cooling pipeline.

6. The cooling pipe structure of the compressor in the air-suspended centrifugal chiller unit according to claim 4, characterized in that, The second pipeline is equipped with a reducer, which is located close to the compressor, so as to work with the solenoid valve and the electronic expansion valve to control the flow and pressure of the refrigerant.

7. The cooling pipe structure of the compressor in the air-suspended centrifugal chiller unit according to claim 1, characterized in that, The compressor has a cooling circuit for the refrigerant to circulate.

8. The cooling pipe structure of the compressor in the air-suspended centrifugal chiller unit according to claim 7, characterized in that, The cooling circuit includes a first circuit opened outside the motor cavity of the compressor. The first circuit is connected to the intermediate flow channel between the motor cavity and the main shaft of the compressor. An outlet pipe is also opened on the motor cavity, which is connected to the intermediate flow channel. After the refrigerant enters the motor cavity from the first circuit, it passes through the intermediate flow channel and connects to the outlet pipe, thereby exchanging heat with the compressor.

9. The cooling pipe structure of the compressor in the air-suspended centrifugal chiller unit according to claim 7, characterized in that, An inlet pipe is installed on the first circuit.

10. The cooling pipe structure of the compressor in the air-suspended centrifugal chiller unit according to claim 7, characterized in that, The first circuit is spirally arranged around the motor cavity.

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