Efficient direct-current single-phase cooling device
By adopting a DC compressor and chilled water tank design in the air conditioning refrigeration system, combined with proportional valve regulation and driver cold plate cooling, the problems of load return liquid impact and AC compressor are solved, thereby improving system stability and refrigeration efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-31
- Publication Date
- 2026-03-17
AI Technical Summary
In traditional air conditioning refrigeration systems, the impact of liquid return from the load on the heat exchanger is significant, resulting in poor system stability and limited refrigeration efficiency; AC compressors have high starting current, low operating efficiency, and prominent issues with heat generation and noise.
The system employs a DC compressor and chilled water tank design, combined with a return liquid proportional valve, a supply liquid proportional valve, and a bypass proportional valve. Through liquid inlet and outlet heat exchange between the chilled water tank and the heat exchanger, the return liquid and supply liquid are regulated. Combined with the driver's cold plate to cool the drive components, the system stability and refrigeration efficiency are improved.
It achieves reduced compressor energy consumption, smooth start-up, low noise, improved system stability, takes into account load demand fluctuations, ensures the stable and safe use of each drive component, and improves refrigeration efficiency.
Smart Images
Figure CN224003965U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of refrigeration, specifically a high-efficiency DC single-phase cooling device. Background Technology
[0002] In traditional air conditioning refrigeration systems, there are two types of liquid return and supply mechanisms. One type involves direct liquid return to the heat exchanger, with the heat exchanger supplying liquid via a buffer tank. This design causes significant impact on the heat exchanger during liquid return, leading to poor system stability and failure to achieve the set power output under high load conditions. The other type involves direct liquid return to the heat exchanger via a buffer tank, with the heat exchanger supplying liquid directly. In this design, the tank capacity is negatively correlated with refrigeration efficiency; under fluctuating load conditions, the tank capacity directly constrains refrigeration efficiency. Furthermore, many electronic components within the refrigeration system are controlled and driven, and the resulting heat generation affects refrigeration performance and lifespan. Conventionally used AC compressors typically suffer from high starting current, low operating efficiency, heat generation, and noise. Summary of the Invention
[0003] This invention provides a high-efficiency DC unidirectional cooling device with a simple structure, easy to simplify and use with a lightweight design, and high cooling efficiency.
[0004] The technical solution adopted by this utility model is: a high-efficiency DC single-phase cooling device, including a compression refrigeration system and a heat exchanger. The compression refrigeration system is connected to one hot section of the heat exchanger, and the inlet and outlet of the other hot section of the heat exchanger are respectively connected to a heat exchange outlet pipe and a heat exchange inlet pipe. The device is characterized by further including a cold water tank. The lower part of one side of the cold water tank is connected to the lower inlet of the other hot section of the heat exchanger via a heat exchange inlet pipe equipped with a heat exchange inlet pump. The upper outlet of the other hot section of the heat exchanger is connected to the upper part of one side of the cold water tank via a heat exchange outlet pipe. The upper and lower parts of the other side of the cold water tank are respectively connected to a return pipe and a supply pipe. The return pipe is connected to a water collector, a return solenoid valve, a return pressure sensor, and a return liquid... A temperature sensor and a return proportional valve are connected to a cold water tank. The supply pipe, originating from the cold water tank, passes sequentially through a first supply temperature sensor and a cold water proportional valve to a mixing valve. The mixing valve branches out into multiple supply branches. One or more supply branches connect to a distributor, and the other one or more supply branches connect to a collector. The distributor branches out into multiple supply branches and one branch connects to a collector. Each supply branch is equipped with a supply solenoid valve, a supply pump, a supply check valve, and a second supply temperature sensor. A bypass pipe connects the return pipe before the return proportional valve to the supply pipe after the cold water proportional valve, and a bypass proportional valve is installed on the bypass pipe. The compression refrigeration system includes a DC compressor.
[0005] The compression refrigeration system includes one or more compressor units, each compressor unit comprising a compressor, a condenser, a liquid receiver, a dryer filter, and an expansion valve connected in series.
[0006] The compressor is a DC compressor.
[0007] The mixer is equipped with an electric heater.
[0008] The cold water tank is equipped with multiple layers of partitions, and the cold water tank temperature sensors are installed in the multiple labyrinthine interconnected cavities separated by the multiple layers of partitions.
[0009] It also includes a multi-channel driver cooling path, which is connected from the return solenoid valve of the return pipe to any liquid supply branch or to the liquid supply check valve of each of the multiple liquid supply branches. Each driver cooling path is equipped with a driver cooling solenoid valve and a driver cold plate.
[0010] The driver cold plate of multiple driver cooling paths corresponds to the electrical control box, or to the evaporator fan motor, or to the condenser fan motor, or to the compressor drive motor, or to each solenoid valve.
[0011] The upper end of the cold water tank is connected to a water supply pipe, and the lower end is connected to a drain pipe.
[0012] The beneficial effects of this utility model are:
[0013] 1. The compressor uses a DC compressor, which helps to reduce compressor energy consumption, ensure smooth start-up, and reduce noise.
[0014] 2. A cold water tank is used as an intermediate point for the return liquid supply to the load. The heat exchange between the cold water tank and the heat exchanger is achieved through liquid inlet and outlet. Based on the return liquid proportional valve, the supply liquid proportional valve and bypass proportional valve are combined for regulation, which effectively prevents return liquid shock and improves system stability. At the same time, the capacity design of the cold water tank can take into account a wide range of load demand fluctuations, further ensuring the stability of the load refrigeration system.
[0015] 3. After the mixing device on the supply pipe, the supply branch connects to the water collector and the water distributor. The water distributor connects to the water collector and the load supply. It can be regulated by the solenoid valve on it to meet the wide fluctuation requirements of the load.
[0016] 4. The return pipe is connected to the driver cooling passage. The driver cooling passage is equipped with a driver cold plate. The driver cold plate cools the drivers of each driving element in the cooling device, effectively balancing the overall energy saving and consumption reduction of the device while ensuring the stable and safe use of each driving element. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the structure of this utility model.
[0018] In the diagram: 1. Compression refrigeration system; 2. Heat exchanger; 3. Heat exchanger outlet pipe; 4. Heat exchanger outlet pipe solenoid valve; 5. Heat exchanger outlet pipe temperature sensor; 6. Heat exchanger inlet pipe; 7. Heat exchanger inlet pipe solenoid valve; 8. Heat exchanger inlet pump; 9. Cold water tank; 10. Makeup pipe; 11. Drain pipe; 12. Baffle plate; 13. Cold water tank temperature sensor; 14. Water collector; 15. Return pipe; 16. Return solenoid valve; 17. Return pressure sensor; 18. Return temperature sensor; 19. Return proportional valve; 10. Bypass pipe. 20. Bypass proportional valve 21. Liquid supply pipe 22. First liquid supply temperature sensor 23. Liquid supply proportional valve 24. Mixer 25. Electric heater 26. Liquid supply branch 27. Liquid supply solenoid valve 28. Liquid supply pump 29. Liquid supply check valve 30. Second liquid supply temperature sensor 31. Water distributor 32. Driver cooling passage 33. Driver cooling solenoid valve 34. Driver cold plate 35. Electrical control box 36. Evaporator fan motor 37. Compressor drive motor 38. Detailed Implementation
[0019] The following explanation, in conjunction with the accompanying drawings, will provide further details.
[0020] Figure 1 The diagram shows a high-efficiency DC single-phase cooling device, comprising a compression refrigeration system 1, a heat exchanger 2, a heat exchange outlet pipe 3, a heat exchange outlet pipe solenoid valve 4, a heat exchange outlet pipe temperature sensor 5, a heat exchange inlet pipe 6, a heat exchange inlet pipe solenoid valve 7, a heat exchange inlet pump 8, a cold water tank 9, a water supply pipe 10, a drain pipe 11, a partition 12, a cold water tank temperature sensor 13, a water collector 14, a return pipe 15, a return solenoid valve 16, a return pressure sensor 17, and a return temperature sensor. Temperature sensor 18, return liquid proportional valve 19, bypass pipeline 20, bypass proportional valve 21, supply liquid pipeline 22, first supply liquid temperature sensor 23, supply liquid proportional valve 24, mixer 25, electric heater 26, supply liquid branch 27, supply liquid solenoid valve 28, supply liquid pump 29, supply liquid check valve 30, second supply liquid temperature sensor 31, water distributor 32, driver cooling passage 33, driver cooling solenoid valve 34, driver cold plate 35, electrical control box 36.
[0021] The compression refrigeration system 1 uses a DC compressor. One or more compression refrigeration systems 1 are connected to one heat exchanger 2 hot pass. The inlet and outlet of the other hot pass of the heat exchanger 2 are respectively connected to the heat exchange outlet pipe 3 and the heat exchange inlet pipe 6. The lower part of one side of the cold water tank 9 is connected to the lower inlet of the other hot pass of the heat exchanger 2 via the heat exchange inlet pipe 6, which has a heat exchange inlet pipe solenoid valve 7 and a heat exchange inlet pump 8. The upper outlet of the other hot pass of the heat exchanger 2 is connected to the upper part of one side of the cold water tank 9 via the heat exchange outlet pipe 3, which has a heat exchange outlet pipe solenoid valve 4 and a heat exchange outlet pipe temperature sensor 5. The cold water tank 9 is equipped with multiple partitions 12. The cold water tank temperature sensor 13 is installed in the multiple labyrinthine interconnected cavities of the cold water tank separated by the multiple partitions. The upper end of the cold water tank 9 is connected to the water supply pipe 10 and the lower end is connected to the drain pipe 11.
[0022] On the other side of the cold water tank 9, the upper and lower parts are respectively connected to the return pipe 15 and the supply pipe 22. The return pipe 15 is connected to the cold water tank 9 via the water collector 14, the return solenoid valve 16, the return pressure sensor 17, the return temperature sensor 18, and the return proportional valve 19. The supply pipe 22 is connected to the cold water tank 9 via the first supply temperature sensor 23 and the cold water proportional valve 24, and then to the mixing valve 25. The mixing valve 25 contains an electric heater 26. The mixing valve 25 is divided into three... One liquid supply branch 27 connects to a distributor 32, and the other two supply branches connect to a collector 14. The distributor 32 branches out multiple supply lines and one line connects to the collector 14. Each supply branch is equipped with a supply solenoid valve 28, a supply pump 29, a supply check valve 30, and a second supply temperature sensor 31. A bypass pipe 20 connects the return pipe before the return proportional valve to the supply pipe after the cold water proportional valve, and a bypass proportional valve 21 is installed on the bypass pipe. Three driver cooling passages 33 branch off from the return solenoid valve on the return pipe, each connecting to one of the three supply branches 27. Each driver cooling passage 33 is equipped with a driver cooling solenoid valve 34, a driver cold plate 35, and another driver cooling solenoid valve. On the driver cooling passage corresponding to the supply branch connected to the collector, the driver cold plate corresponds to the compressor drive motor and evaporator fan motor of the refrigeration system. On the other driver cooling passage, the driver cold plate corresponds to each solenoid valve.
[0023] In this embodiment, each electrical component is driven and controlled by the electrical control box 36.
[0024] In this embodiment, the compression refrigeration system includes one or more compressor units, each compressor unit comprising a compressor, a condenser, a liquid receiver, a dryer filter, and an expansion valve connected in series. This system structure is conventional prior art and will not be described in detail in this embodiment and the accompanying drawings.
[0025] Based on this embodiment, the driver cold plate can also be connected to the liquid supply branch of the water collector corresponding to each solenoid valve, or the driver cold plate can be adjusted to correspond to different driver electronic components as needed for cooling capacity.
[0026] Based on this embodiment, the driver cold plate can also be used to cool the electrical control box.
Claims
1. A high-efficiency DC single-phase cooling device, comprising a compression refrigeration system and a heat exchanger, wherein the compression refrigeration system is connected to one hot section of the heat exchanger, and the inlet and outlet of the other hot section of the heat exchanger are respectively connected to a heat exchange outlet pipe and a heat exchange inlet pipe, characterized in that: The cold water tank is connected with the other side of the heat exchanger through a return liquid pipe and a liquid supply pipe, the return liquid pipe is connected with the cold water tank through a water collector, a return liquid electromagnetic valve, a return liquid pressure sensor, a return liquid temperature sensor and a return liquid proportional valve in sequence, and the liquid supply pipe is connected with the cold water tank through a first liquid supply temperature sensor and a cold water proportional valve in sequence and then connected with the water mixer, the water mixer is connected with a water distributor through one or more liquid supply branches and connected with the water collector through the other one or more liquid supply branches, the water distributor is connected with the water collector through one or more liquid supply branches and connected with the water collector through one liquid supply branch, a liquid supply electromagnetic valve, a liquid supply pump, a liquid supply check valve and a second liquid supply temperature sensor are arranged on the liquid supply branch, a bypass pipe is arranged between the return liquid pipe before the return liquid proportional valve and the liquid supply pipe after the cold water proportional valve, and a bypass proportional valve is arranged on the bypass pipe.
2. The high efficiency direct current single phase cooling device of claim 1, wherein: The compression refrigeration system comprises one or more compressor groups, and each compressor group comprises a compressor, a condenser, a liquid accumulator, a drying filter and an expansion valve connected in sequence.
3. The high efficiency direct current single phase cooling device of claim 1, wherein: The compressor is a direct-current compressor.
4. The high efficiency direct current single phase cooling device of claim 1, wherein: The water mixer is provided with an electric heater.
5. The high efficiency direct current single phase cooling device of claim 1, wherein: The cold water tank is provided with a plurality of partition plates, and a cold water tank temperature sensor is arranged in each of a plurality of labyrinth-type cavities separated by the partition plates.
6. The high efficiency direct current single phase cooling device of claim 1, wherein: The system further comprises a plurality of driver cooling channels, each of which is connected to any liquid supply branch or connected to a liquid supply check valve of each liquid supply branch after the return liquid electromagnetic valve of the return liquid pipe, and each driver cooling channel is provided with a driver cooling electromagnetic valve and a driver cooling plate.
7. The high efficiency direct current single phase cooling device of claim 6, wherein: The driver cooling plates of the plurality of driver cooling channels correspond to the electric control box, the evaporator fan motor, the condenser fan motor, the compressor driving motor or each electromagnetic valve.
8. The high efficiency direct current single phase cooling device of claim 1, wherein: The cold water tank is connected with a water supplement pipe at the upper end and a drain pipe at the lower end.