A whole machine cooling system based on air cooling and air conditioner refrigeration intercutting

Abstract

The utility model discloses a kind of whole machine cooling systems based on air cooling and air conditioning refrigeration mutual cutting, it is related to heat dissipation equipment technical field, comprising: frequency converter cabinet;Refrigeration room, the frequency converter cabinet is set in refrigeration room, and air conditioning unit and air cooling unit are also respectively arranged in the refrigeration room;Control unit, the control unit is used to control the operation of air conditioning unit and air cooling unit according to external temperature threshold respectively;The shell of the frequency converter cabinet is with and air conditioning unit import and export respectively intercommunication air conditioning air inlet and air conditioning air outlet, to form internal circulation;The shell of the frequency converter cabinet is also with and air cooling unit import intercommunication air cooling inlet, and air cooling export is communicated with refrigeration room outside, to form external circulation.Using the present scheme, can be set according to temperature threshold, switch air conditioning unit and air cooling unit, to reduce energy consumption, improve cooling efficiency, satisfy refrigeration effect and save cost.

Description

Technical Field

[0001] This utility model relates to the field of heat dissipation equipment technology, specifically to a whole-machine cooling system based on the switching between air cooling and air conditioning refrigeration. Background Technology

[0002] Currently, high-voltage frequency converters, as a major product for energy conservation and emission reduction, have been widely used in power generation, chemical industry, metallurgy, mining, and other fields, playing an increasingly important role. The efficiency of high-voltage frequency converters can generally reach 95% to 97%, with the remainder dissipated as heat. This heat directly affects the lifespan of electronic components and the reliability of equipment operation.

[0003] Currently, the most widely used cooling methods for frequency converter rooms are open-duct cooling and closed-loop air conditioning. Both have certain drawbacks in practical applications. The former has low cooling efficiency and poor heat dissipation in hot weather, while the latter consumes a lot of electricity and has high maintenance costs. In photovoltaic and solar thermal power generation projects, the equipment often needs to be in an environment with hot summers, dry winters, and little rainfall throughout the year, and the efficiency requirement for the frequency converter itself is extremely high, ≥99%. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention aims to provide a whole-machine cooling system based on the switching between air cooling and air conditioning refrigeration. By adopting this solution, the air conditioning unit and the air cooling unit can be switched according to a set temperature threshold, thereby reducing energy consumption, improving cooling efficiency, meeting cooling requirements, and saving costs.

[0005] This utility model is achieved through the following technical solution:

[0006] A whole-unit cooling system based on the switching between air cooling and air conditioning refrigeration includes:

[0007] Inverter cabinet;

[0008] The inverter cabinet is located in the refrigeration room, and the refrigeration room is also equipped with an air conditioning unit and an air-cooling unit.

[0009] A control unit, which is used to control the operation of the air conditioning unit and the air-cooling unit respectively according to the external temperature threshold;

[0010] The inverter cabinet has an air conditioning inlet and an air conditioning outlet that are connected to the air conditioning unit inlet and outlet, respectively, to form an internal circulation; the inverter cabinet also has an air-cooled inlet that is connected to the air-cooled unit inlet, and an air-cooled outlet that is connected to the outside of the refrigeration room, to form an external circulation.

[0011] Compared to existing technologies, which suffer from low cooling efficiency and poor heat dissipation in hot weather due to open-duct cooling, and high power consumption and maintenance costs due to closed-loop air conditioning, this invention provides a whole-unit cooling system based on the switching of air cooling and air conditioning. This solution allows for cooling via an air conditioning unit during extremely hot weather, and fan cooling when the weather is within acceptable temperature limits, based on a set temperature threshold. This method can achieve an inverter efficiency of over 99%, thereby reducing energy consumption, improving cooling efficiency, meeting cooling requirements, and saving costs. Specifically, the system includes a cooling chamber containing an inverter cabinet, an air conditioning unit, and an air-cooling unit. The air conditioning unit uses a built-in air conditioner. The air conditioner's outlet supplies cool air to the air conditioning inlet of the inverter cabinet. The cool air enters the inverter cabinet, carrying away heat from the internal components, and is then discharged from the air conditioning outlet. It is then drawn back in through the air conditioner's inlet to achieve internal circulation. The air-cooled unit can draw in natural air or underground cold air for cooling. The outlet of the air-cooled unit can supply natural air to the air-cooling inlet of the inverter cabinet. This natural air enters the inverter cabinet and carries away heat from the internal components, then is exhausted from the cold air outlet of the inverter cabinet to the outside of the cooling chamber, achieving external circulation. The above cooling method can be switched via a control unit. For example, a temperature threshold of 35 degrees Celsius can be set. When the outside temperature is 35 degrees Celsius or higher, air-cooling can be used; when the outside temperature is below 35 degrees Celsius, air-cooling can be used. Of course, the control unit can also switch manually and according to the season based on GPS time synchronization. The above-described solution for overall heat dissipation, using temperature detection or manual switching to combine air cooling and air-cooling to achieve an overall efficiency >99%, ensures cooling effect, saves costs, and improves efficiency.

[0012] To further optimize the system and achieve internal circulation within the sealed chamber, the cooling room includes a first chamber, in which the inverter cabinet and the air conditioning unit are both located.

[0013] Further optimization involves using a side-intake method for the inverter cabinet itself to remove most of the heat from the internal components. The inverter cabinet and the air conditioning unit are located on opposite sides of the first chamber. The air conditioning inlet of the inverter cabinet is located on the side facing the air conditioning unit, and the air conditioning outlet of the inverter cabinet is located on its top.

[0014] To further optimize the system and prevent interference between the air conditioning unit and the air-cooling unit, the refrigeration chamber is further equipped with a second chamber located below the first chamber. The air-cooling unit is located in the second chamber, and a channel connecting the first chamber and the second chamber to the air-cooling inlet is provided.

[0015] Further optimized, as a specific structure of an air-cooled unit, the air-cooled unit includes several air inlet windows opened on the side wall of the second chamber, and each air inlet window is equipped with a first filter. The air inlet windows are equipped with louvers, have an IP54 protection rating, and are equipped with a removable first filter for sand, dust, and water protection.

[0016] To further optimize the design, the second chamber is located underground to allow in cooler ambient air, and the air intake window is located through a trench.

[0017] Further optimization involves using a bottom-intake airflow method for the inverter cabinet itself to remove most of the heat from the internal components. The inverter cabinet is placed above the passageway, with the air-cooling inlet located at the bottom of the inverter cabinet and the air-cooling outlet located at the top of the inverter cabinet.

[0018] To further optimize the system and control the opening and closing of the air-cooled unit, enabling switching between the air conditioning unit and the air-cooled unit, an electrically controlled baffle is installed at the air-cooled inlet. This baffle is used to open or close the air-cooled inlet. In this design, the electrically controlled baffle can be configured with a sliding drive, such as a telescopic motor. The baffle is slidably connected to the side wall of the air-cooled inlet. By extending or retracting the output end of the telescopic motor, the baffle is pulled back and forth, thus opening and closing the air-cooled inlet.

[0019] To further optimize the system and prevent dust accumulation inside the inverter cabinet, a second filter is installed at the air-cooling inlet.

[0020] To further optimize the system and improve gas flow rate and heat dissipation efficiency, a fan is installed on the top of the inverter cabinet. The air conditioning outlet and the air-cooled outlet are both connected to the inlet of the fan. The fan has a first outlet and a second outlet. The first outlet is connected to the outside of the refrigeration chamber, and the second outlet is connected to the inlet of the air conditioning unit. A first air valve is installed at the first outlet, and a second air valve is installed at the second outlet.

[0021] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0022] This utility model provides a whole-machine cooling system based on the switching of air cooling and air conditioning refrigeration. Using this solution, the air conditioning unit and the air cooling unit can be switched according to the set temperature threshold. Using this method, the efficiency of the inverter body can reach more than 99%, thereby reducing energy consumption, improving cooling efficiency, meeting the cooling effect and saving costs. Attached Figure Description

[0023] The accompanying drawings, which are included to provide a further understanding of the embodiments of the present invention and form part of this application, do not constitute a limitation thereof. In the drawings:

[0024] Figure 1 A schematic diagram of the overall cooling system provided by this utility model during air conditioning refrigeration;

[0025] Figure 2 A schematic diagram of the overall cooling system provided by this utility model in air-cooled mode.

[0026] The attached diagram shows the markings and corresponding component names:

[0027] 1-Inverter cabinet, 2-Refrigeration chamber, 201-First chamber, 202-Second chamber, 3-Air inlet window, 4-Electrically controlled wind deflector, 5-Fan. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of this utility model are only used to explain this utility model and are not intended to limit this utility model.

[0029] Example 1:

[0030] This embodiment 1 provides a whole-machine cooling system based on the switching between air cooling and air conditioning refrigeration, such as Figure 1 and Figure 2 As shown, it includes:

[0031] Inverter cabinet 1;

[0032] The refrigeration chamber 2 is provided with the inverter cabinet 1, and the refrigeration chamber 2 is also provided with an air conditioning unit and an air-cooling unit.

[0033] A control unit, which is used to control the operation of the air conditioning unit and the air-cooling unit respectively according to the external temperature threshold;

[0034] The inverter cabinet 1 has an air conditioning inlet and an air conditioning outlet that are respectively connected to the air conditioning unit inlet and outlet to form an internal circulation; the inverter cabinet 1 also has an air-cooling inlet that is connected to the air-cooling unit inlet and an air-cooling outlet that is connected to the outside of the refrigeration chamber 2 to form an external circulation.

[0035] Compared to existing technologies, which suffer from low cooling efficiency and poor heat dissipation in hot weather due to open-duct cooling, and high power consumption and maintenance costs due to closed-loop air conditioning, this invention provides a whole-unit cooling system based on the switching of air cooling and air conditioning. This solution allows for cooling by the air conditioning unit during extremely hot weather, and by the fan 5 during temperatures within acceptable limits, based on a set temperature threshold. This method can achieve an inverter efficiency of over 99%, thereby reducing energy consumption, improving cooling efficiency, meeting cooling requirements, and saving costs. Specifically, the system includes a cooling chamber 2, within which are installed an inverter cabinet 1, an air conditioning unit, and an air-cooling unit. The air conditioning unit uses a built-in air conditioner. The air conditioner's outlet supplies cool air to the air conditioning inlet of the inverter cabinet 1. The cool air enters the inverter cabinet 1, carrying away heat from the internal components, and is then discharged from the air conditioning outlet. It is then drawn back in through the air conditioner's inlet to achieve internal circulation. The air-cooled unit can be cooled by natural air or underground cold air. The outlet of the air-cooled unit can supply natural air to the air-cooling inlet of the inverter cabinet 1. The natural air enters the inverter cabinet 1 and carries away heat from the internal components, then is exhausted from the cold air outlet of the inverter cabinet 1 to the outside of the cooling chamber 2, achieving external circulation. The above cooling method can be switched via the control unit. For example, a temperature threshold of 35 degrees Celsius can be set. When the outside temperature is 35 degrees Celsius or higher, air-cooling can be used; when the outside temperature is below 35 degrees Celsius, air-cooling can be used. Of course, the control unit can also switch manually and according to the season based on GPS time synchronization. The above-described solution for overall heat dissipation, using temperature detection or manual switching to combine air cooling and air-cooling to achieve an overall efficiency >99%, ensures cooling effect, saves costs, and improves efficiency.

[0036] In some embodiments, to achieve internal circulation in a closed chamber, the refrigeration chamber 2 has a first chamber 201, and the inverter cabinet 1 and the air conditioning unit are both disposed in the first chamber 201.

[0037] In some embodiments, as a side air intake method of the inverter cabinet 1 itself to remove most of the heat of the internal components, the inverter cabinet 1 and the air conditioning unit are respectively located on both sides inside the first chamber 201; the air conditioning air inlet of the inverter cabinet 1 is opened on the side facing the air conditioning unit, and the air conditioning air outlet of the inverter cabinet 1 is opened on the top of itself.

[0038] In some embodiments, to separate the air conditioning unit and the air-cooling unit so that they do not interfere with each other, the refrigeration chamber 2 also has a second chamber 202, which is located below the first chamber 201; the air-cooling unit is disposed in the second chamber 202, and a channel communicating with the air-cooling inlet is opened between the first chamber 201 and the second chamber 202.

[0039] In some embodiments, as a specific structure of an air-cooled unit, the air-cooled unit includes a plurality of air inlet windows 3 opened on the side wall of the second chamber 202, and the air inlet windows 3 are provided with a first filter. The air inlet windows 3 are provided with louvers, have an IP54 protection rating, and are equipped with a removable first filter for sandproofing, dustproofing, and waterproofing.

[0040] In some embodiments, to allow the introduction of cooler ambient natural wind, the second chamber 202 is located underground, and the air inlet window 3 allows air to enter through a trench.

[0041] In some embodiments, as a bottom air intake method of the inverter cabinet 1 itself to remove most of the heat of the internal components, the inverter cabinet 1 is placed above the passage, and the air-cooling inlet is located at the bottom of the inverter cabinet 1, and the air-cooling outlet is located at the top of the inverter cabinet 1.

[0042] In some embodiments, to control the opening and closing of the air-cooled unit and switch between the air conditioning unit and the air-cooled unit, an electrically controlled baffle 4 is provided at the air-cooled inlet. The electrically controlled baffle 4 is used to open or close the air-cooled inlet. In this solution, the electrically controlled baffle 4 can be configured as a sliding drive, such as by setting a telescopic motor. The baffle and the side wall of the air-cooled inlet are slidably connected. By extending and retracting the output end of the telescopic motor, the baffle is pulled back and forth to open and close the air-cooled inlet.

[0043] In some embodiments, a second filter is provided at the air-cooling inlet to prevent dust accumulation inside the inverter cabinet 1.

[0044] In some embodiments, to increase gas flow rate and heat dissipation efficiency, a fan 5 is provided on the top of the inverter cabinet 1, and the air conditioning outlet and the air-cooled outlet are both connected to the inlet of the fan 5; the fan 5 has a first outlet and a second outlet respectively, the first outlet is connected to the outside of the refrigeration chamber 2, and the second outlet is connected to the inlet of the air conditioning unit; a first air valve is provided at the first outlet, and a second air valve is provided at the second outlet.

[0045] How this solution works:

[0046] This solution proposes a hybrid cooling scheme that combines air cooling and air conditioning, which can switch between air cooling and air conditioning based on the external temperature threshold, manual operation, or GPS time synchronization according to the season via a control unit.

[0047] When the temperature sensor detects an outside temperature of 35 degrees Celsius or higher, the control unit controls the electronically controlled baffle 4 to close the air-cooled inlet, starts the fan 5, opens the second air valve, and closes the first air valve. At this time, the air conditioner blows cool air onto the inverter cabinet 1 for heat dissipation, forming an internal circulation. Figure 1 As shown.

[0048] When the temperature sensor detects that the outside temperature is below 35 degrees Celsius, the control unit controls the electronically controlled baffle 4 to open the air-cooling inlet, starts the fan 5, closes the second air valve, and opens the first air valve. At this time, the cold air from the trench blows towards the inverter cabinet 1 for heat dissipation and is discharged to the outside of the cooling chamber 2 through the first air valve to form an external circulation.

[0049] Example 2:

[0050] This embodiment 2 provides a specific implementation method based on embodiment 1.

[0051] In existing technologies, high-voltage frequency converters typically achieve efficiencies of 95% to 97%, generating significant heat that directly impacts the lifespan of electronic components and the reliability of equipment operation. For example, in a certain region in 2024, there were 46 days with temperatures above 35 degrees Celsius and 320 days below 35 degrees Celsius. Using a weighted algorithm, days with temperatures above 35 degrees Celsius had a weight of 0.1, while days below 35 degrees Celsius had a weight of 0.9. Since fan cooling is ineffective above 35 degrees Celsius, air conditioning is used for cooling. The loss data for various components in the high-voltage frequency converter are shown in the table below.

[0052]

[0053] In this project, the rated capacity of the high-voltage frequency converter is 14MVA, then the efficiency of the frequency converter itself is:

[0054]

[0055] Based on the weighting calculations above, the weighted efficiency of the high-voltage frequency converter can be obtained as shown in the table below:

[0056]

[0057] As mentioned above, by setting up switchable air cooling and air conditioning, the inverter's efficiency can reach over 99%, achieving the desired cooling effect and saving costs.

[0058] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A whole-machine cooling system based on the alternation of air cooling and air conditioning refrigeration, characterized in that, include: Inverter cabinet (1); The refrigeration chamber (2) is provided with the inverter cabinet (1) inside the refrigeration chamber (2), and the refrigeration chamber (2) is also provided with an air conditioning unit and an air-cooled unit. A control unit, which is used to control the operation of the air conditioning unit and the air-cooling unit respectively according to the external temperature threshold; The inverter cabinet (1) has an air conditioning air inlet and an air conditioning air outlet that are respectively connected to the air conditioning unit inlet and outlet to form an internal circulation; the inverter cabinet (1) also has an air cooling inlet that is connected to the air cooling unit inlet and an air cooling outlet that is connected to the outside of the refrigeration room (2) to form an external circulation.

2. The whole-machine cooling system based on the alternating switching of air cooling and air conditioning refrigeration according to claim 1, characterized in that, The refrigeration chamber (2) has a first chamber (201), and the inverter cabinet (1) and the air conditioning unit are both located in the first chamber (201).

3. The whole-machine cooling system based on the alternating switching of air cooling and air conditioning refrigeration according to claim 2, characterized in that, The inverter cabinet (1) and the air conditioning unit are located on opposite sides inside the first chamber (201); the air conditioning air inlet of the inverter cabinet (1) is located on the side facing the air conditioning unit, and the air conditioning air outlet of the inverter cabinet (1) is located on its top.

4. The whole-machine cooling system based on the alternating switching of air cooling and air conditioning refrigeration according to claim 2, characterized in that, The refrigeration chamber (2) also has a second chamber (202), which is located below the first chamber (201); the air-cooling unit is located in the second chamber (202), and there is a channel between the first chamber (201) and the second chamber (202) that communicates with the air-cooling inlet.

5. A whole-machine cooling system based on the alternating switching of air cooling and air conditioning refrigeration according to claim 4, characterized in that, The air-cooled unit includes several air inlet windows (3) opened on the side wall of the second chamber (202), and the air inlet windows (3) are provided with a first filter screen.

6. A whole-machine cooling system based on the alternating switching of air cooling and air conditioning refrigeration according to claim 5, characterized in that, The second chamber (202) is located underground, and the air intake window (3) is through a trench for air intake.

7. A whole-machine cooling system based on the alternating switching of air cooling and air conditioning refrigeration according to claim 4, characterized in that, The inverter cabinet (1) is placed above the passage, with the air-cooling inlet located at the bottom of the inverter cabinet (1) and the air-cooling outlet located at the top of the inverter cabinet (1).

8. A whole-machine cooling system based on the alternating switching of air cooling and air conditioning refrigeration according to any one of claims 1 to 7, characterized in that, An electrically controlled baffle (4) is provided at the air-cooled inlet, which is used to open or close the air-cooled inlet.

9. A whole-machine cooling system based on the alternating switching of air cooling and air conditioning refrigeration according to any one of claims 1 to 7, characterized in that, A second filter screen is also provided at the air-cooled inlet.

10. A whole-machine cooling system based on the alternating switching of air cooling and air conditioning refrigeration according to any one of claims 1 to 7, characterized in that, The top of the inverter cabinet (1) is equipped with a fan (5), and the air conditioning outlet and the air-cooled outlet are connected to the inlet of the fan (5); the fan (5) is equipped with a first outlet and a second outlet respectively. The first outlet is connected to the outside of the refrigeration chamber (2), and the second outlet is connected to the inlet of the air conditioning unit; a first air valve is provided at the first outlet, and a second air valve is provided at the second outlet.

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