Cooling pipeline structure of frequency converter of air suspension centrifugal water chilling unit

Abstract

The utility model discloses a cooling pipeline structure of a frequency converter 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. A cooling branch is arranged on the frequency converter and comprises a first pipeline and a second pipeline, one end of the first pipeline communicates with the condenser, the end, away from the condenser, of the first pipeline communicates with the frequency converter, one end of the second pipeline communicates with the frequency converter, and the end, away from the frequency converter, of the second pipeline communicates with the evaporator. Therefore, the frequency converter is cooled. According to the utility model, the heat dissipation efficiency of the frequency converter is improved, and stable operation of the frequency converter under various working conditions is ensured; the layout and structure of a cooling pipeline are optimized, the occupied space is reduced, and the integration degree of the water chilling unit is improved; and the energy consumption and the maintenance cost of the cooling system are reduced.

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 an air-suspended centrifugal chiller inverter. Background Technology

[0002] Currently, the frequency converter, as one of the core components of air-suspended centrifugal chiller units, functions by adjusting the compressor speed through changes in the power supply frequency, thereby achieving precise control of the cooling capacity. This precise control allows the chiller unit to flexibly adjust its cooling capacity according to changes in actual load, improving energy efficiency and reducing operating costs. However, frequency converters generate a significant amount of heat during operation. If this heat cannot be dissipated in time, it will cause the frequency converter temperature to rise, affecting its performance and lifespan, and even leading to malfunctions. Therefore, effective cooling measures are crucial for the normal operation of the frequency converter.

[0003] Early air-suspended centrifugal chiller inverters mostly adopted cooling methods from traditional industrial equipment, such as air cooling and natural cooling. Although air cooling is simple in structure and low in cost, its cooling efficiency is relatively low, especially when the ambient temperature is high or the inverter load is heavy, making it difficult to meet the inverter's heat dissipation requirements. In addition, air cooling requires the use of fans and other equipment, which generates noise and affects the working environment.

[0004] Therefore, it is urgent to design a cooling pipe structure for the inverter of an air-suspended centrifugal chiller to solve the problem of poor heat dissipation of the inverter mentioned above. Utility Model Content

[0005] To address the technical problem of poor heat dissipation in frequency converters mentioned in the background art, a cooling pipe structure for a frequency converter in an air-suspended centrifugal chiller unit is provided to solve the aforementioned problem.

[0006] To achieve the above objectives, the specific technical solution for the cooling pipe structure of the inverter in the air-suspended centrifugal chiller unit of this utility model is as follows:

[0007] A cooling pipe structure for an air-suspended centrifugal chiller inverter includes a condenser, an economizer connected to the condenser, an evaporator connected to the economizer, a compressor connected to the evaporator, and the compressor connected to the condenser to form a refrigeration cycle loop.

[0008] It also includes a frequency converter, which is equipped with a cooling branch. The cooling branch includes a first pipe and a second 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 frequency converter. One end of the second pipe is connected to the frequency converter, and the end of the second pipe away from the frequency converter is connected to the evaporator, thereby cooling the frequency converter.

[0009] Furthermore, a drying filter is installed on the first pipeline to ensure the purity and stability of the refrigerant in the cooling branch.

[0010] 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.

[0011] 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.

[0012] Furthermore, a sight glass is installed on the first pipeline, located downstream of the electromagnetic expansion valve, to observe the refrigerant in the cooling pipeline.

[0013] Furthermore, a first shut-off valve is installed at the end of the first pipeline near the condenser, and a second shut-off valve is installed at the end of the first pipeline near the frequency converter.

[0014] Furthermore, a third shut-off valve is installed at the end of the second pipeline near the inverter, and a fourth shut-off valve is installed at the end of the second pipeline near the evaporator.

[0015] Furthermore, the inverter housing is equipped with a cooling circuit for refrigerant circulation, and the cooling circuit is located on the housing near the heat dissipation module of the inverter.

[0016] Furthermore, the cooling circuit is arranged in an S-shaped loop.

[0017] Furthermore, the cooling circuit has densely packed heat dissipation fins inside its pipes.

[0018] The cooling pipe structure of the frequency converter in the air-suspended centrifugal chiller unit of this utility model has the following advantages:

[0019] This invention improves the heat dissipation efficiency of the frequency converter, ensuring its stable operation under various working conditions; optimizes the layout and structure of the cooling pipeline, reducing space occupation and improving the integration of the chiller unit; reduces the energy consumption and maintenance costs of the cooling system, and improves the performance and economic benefits of the entire air-suspended centrifugal chiller unit.

[0020] This invention has the advantage of efficient heat dissipation: it directly uses refrigerant for cooling, has high heat exchange efficiency, and can quickly and effectively remove the heat from the frequency converter, ensuring that the frequency converter can maintain a low temperature even under high load operation, thereby improving its working performance and stability.

[0021] This utility model has the advantage of compact structure: the optimized pipeline layout reduces the space occupied by the cooling system, making the overall structure of the air-suspended centrifugal chiller unit more compact, which is convenient for installation and maintenance and improves space utilization.

[0022] This invention has the advantages of energy saving and consumption reduction: by observing the refrigerant flow rate, it can be precisely adjusted according to the actual temperature requirements of the frequency converter, avoiding unnecessary energy consumption, reducing the energy consumption of the cooling system, and improving the energy utilization efficiency of the entire chiller unit. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the cooling pipe structure of the frequency converter of the air-suspended centrifugal chiller unit of this utility model;

[0024] Figure 2 This is a schematic diagram of the cooling circuit layout of this utility model;

[0025] Figure 3 This is a schematic diagram of the internal structure of the cooling circuit pipeline of this utility model.

[0026] The markings in the diagram are as follows: 1. Condenser; 2. Economizer; 3. Evaporator; 4. Compressor; 5. Inverter; 51. Cooling branch; 511. First pipe; 512. Second pipe; 501. Cooling circuit; 5011. Heat dissipation fins; 6. Dryer filter; 7. Solenoid valve; 8. Electronic expansion valve; 9. Sight glass; 10. First shut-off valve; 11. Second shut-off valve; 12. Third shut-off valve; 13. Fourth shut-off valve. Detailed Implementation

[0027] 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.

[0028] 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.

[0029] The following is a reference to the appendix. Figure 1 To be continued Figure 3 This invention describes the cooling pipe structure of the frequency converter of an air-suspended centrifugal chiller unit.

[0030] A cooling pipe structure for an air-suspended centrifugal chiller inverter, such as Figure 1As 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 frequency converter 5, which has a cooling branch 51. The cooling branch 51 includes a first pipe 511 and a second pipe 512. One end of the first pipe 511 is connected to the condenser 1, and the end of the first pipe 511 away from the condenser 1 is connected to the frequency converter 5. One end of the second pipe 512 is connected to the frequency converter 5, and the end of the second pipe 512 away from the frequency converter 5 is connected to the evaporator 3, thereby cooling the frequency converter 5. Specifically, by combining the cooling system of the frequency converter 5 with the refrigeration cycle of the chiller unit, efficient resource utilization is achieved. By directly cooling the frequency converter 5 with refrigerant, cooling efficiency and reliability are improved, and dependence on external air-cooled equipment is reduced.

[0031] Preferably, a drying filter 6 is installed on the first pipeline 511 to ensure the purity and stability of the refrigerant in the cooling branch 51, prevent equipment failure caused by impurities or moisture, and improve the reliability and service life of the system.

[0032] Preferably, a solenoid valve 7 is installed on the first pipeline 511. 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 51. By adjusting the opening of the solenoid valve 7, the refrigerant flow rate can be precisely controlled according to actual needs.

[0033] Preferably, an electronic expansion valve 8 is installed on the first pipeline 511. 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 51. Through the fine adjustment of the electronic expansion valve 8, the flow state of the refrigerant can be controlled more accurately. At the same time, in conjunction with the solenoid valve 7, dual control of refrigerant flow and pressure can be achieved, further optimizing the cooling effect.

[0034] Preferably, a sight glass 9 is installed on the first pipeline 511. The sight glass 9 is located downstream of the electromagnetic 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.

[0035] Preferably, a first shut-off valve 10 is provided at the end of the first pipeline 511 near the condenser 1, and a second shut-off valve 11 is provided at the end of the first pipeline 511 near the frequency converter 5, thereby realizing the independent control function of the first pipeline 511 and facilitating maintenance and repair.

[0036] Preferably, a third shut-off valve 12 is provided at the end of the second pipeline 512 near the inverter 5, and a fourth shut-off valve 13 is provided at the end of the second pipeline 512 near the evaporator 3, providing independent control function for the second pipeline 512 and further optimizing the flexibility of the system.

[0037] As a preferred option, such as Figure 2 As shown, the inverter 5 has a cooling circuit 501 on its housing for refrigerant circulation. The cooling circuit 501 is located on the housing near the heat dissipation module of the inverter 5. By directly using the refrigerant to cool the heat dissipation module of the inverter 5, the cooling efficiency is improved, the dependence on external cooling devices is reduced, and the system structure is simplified.

[0038] Preferably, the cooling circuit 501 is arranged in an S-shape, which extends the flow path of the refrigerant inside the inverter 5, increases the heat exchange area, and ensures sufficient heat exchange between the refrigerant and the heat dissipation module of the inverter 5.

[0039] As a preferred option, such as Figure 3 As shown, the cooling circuit 501 has closely spaced heat dissipation fins 5011 inside the pipes to increase the heat exchange area and improve the heat exchange efficiency. Optionally, the shape of the heat dissipation fins 5011 can be L-shaped, I-shaped, T-shaped, etc.

[0040] This invention uses high-quality materials and reliable sealing technology to reduce the risk of leakage in the cooling pipes and improve the reliability and service life of the system.

[0041] This invention improves the heat dissipation efficiency of the frequency converter 5, ensuring its stable operation under various working conditions; optimizes the layout and structure of the cooling pipeline, reduces space occupation, and improves the integration of the chiller unit; reduces the energy consumption and maintenance costs of the cooling system, and improves the performance and economic benefits of the entire air-suspended centrifugal chiller unit.

[0042] This invention has the advantage of efficient heat dissipation: it directly uses refrigerant for cooling, has high heat exchange efficiency, and can quickly and effectively remove the heat from the inverter 5, ensuring that the inverter 5 can maintain a low temperature even under high load operation, thereby improving its working performance and stability.

[0043] This utility model has the advantage of compact structure: the optimized pipeline layout reduces the space occupied by the cooling system, making the overall structure of the air-suspended centrifugal chiller unit more compact, which is convenient for installation and maintenance and improves space utilization.

[0044] This invention has the advantages of energy saving and consumption reduction: by observing the refrigerant flow rate, it can be precisely adjusted according to the actual temperature requirements of the frequency converter 5, avoiding unnecessary energy consumption, reducing the energy consumption of the cooling system, and improving the energy utilization efficiency of the entire chiller unit.

[0045] 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 an air-suspended centrifugal chiller inverter, 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 frequency converter, which is equipped with a cooling branch. The cooling branch includes a first pipe and a second 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 frequency converter. One end of the second pipe is connected to the frequency converter, and the end of the second pipe away from the frequency converter is connected to the evaporator, thereby cooling the frequency converter.

2. The cooling pipe structure of the frequency converter for the air-suspended centrifugal chiller unit 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 frequency converter for 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 frequency converter for the air-suspended centrifugal chiller unit 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 frequency converter for the air-suspended centrifugal chiller unit according to claim 4, characterized in that, A sight glass is installed on the first pipeline, located downstream of the electromagnetic expansion valve, to observe the refrigerant in the cooling pipeline.

6. The cooling pipe structure of the frequency converter for the air-suspended centrifugal chiller unit according to claim 1, characterized in that, A first shut-off valve is installed at the end of the first pipeline near the condenser, and a second shut-off valve is installed at the end of the first pipeline near the frequency converter.

7. The cooling pipe structure of the frequency converter for the air-suspended centrifugal chiller unit according to claim 1, characterized in that, A third shut-off valve is installed at the end of the second pipeline near the inverter, and a fourth shut-off valve is installed at the end of the second pipeline near the evaporator.

8. The cooling pipe structure of the frequency converter for the air-suspended centrifugal chiller unit according to claim 1, characterized in that, The inverter housing is equipped with a cooling circuit for refrigerant circulation, which is located on the housing near the heat dissipation module of the inverter.

9. The cooling pipe structure of the frequency converter for the air-suspended centrifugal chiller unit according to claim 8, characterized in that, The cooling circuit is arranged in an S-shape.

10. The cooling pipe structure of the frequency converter for the air-suspended centrifugal chiller unit according to claim 9, characterized in that, The cooling circuit has densely packed heat dissipation fins inside the pipes.

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