A cold air blower system with integrated control valve group
Patent Information
- Application Number
- CN202522212082.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-20
- Publication Date
- 2026-09-11
- Estimated Expiration
- 2035-10-20
AI Technical Summary
造成冷风机和相关阀门设计和施工质量参差不齐，增加施工管理难度和隐患
[0011]本实用新型的有益效果在于：本实用新型一种集成控制阀组的冷风机系统，由于冷风机的控制阀组均集成在了风机外壳内部，现场安装时无需额外配置复杂的控制管路和阀门，减少了安装工作量和安装空间，同时也降低了安装成本和因安装不当导致的系统故障风险；控制阀组能够对冷风机的运行状态进行实时的检测和调整，实时调节制冷剂流量，提高制冷效率，同时精准控制化霜周期和化霜时长，减少库温波动和化霜能耗。
Smart Images
Figure CN224743822U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of cold storage refrigeration technology, and in particular to a cold air blower system with integrated control valve group. Background Technology
[0002] As a core heat exchange device in refrigeration systems, evaporative air coolers play a vital role in the cold chain logistics field. Typical applications include low-temperature warehousing, food pre-processing, and biopharmaceutical cold storage, all operating in low-temperature industrial environments. Because evaporative air coolers need to operate continuously in low-temperature, high-humidity environments, a dense frost layer forms on the surface of the coils and fins during heat exchange with humid air. This leads to a chain of thermal problems, including decreased heat transfer efficiency, increased air-side pressure loss, and escalating energy consumption. Therefore, implementing scientific and efficient periodic defrosting operations is a key technical measure to ensure the stable and efficient operation of evaporative air coolers.
[0003] Current defrosting technologies mainly include electric defrosting, hot gas defrosting, water defrosting, and hot brine defrosting. Currently, medium and large-sized cold storage facilities generally adopt external hot gas defrosting solutions based on considerations of ensuring end-point oil return and optimizing energy efficiency. This solution introduces the high-temperature gaseous refrigerant discharged from the compressor into the air cooler for heat exchange, utilizing the latent heat of phase change to melt the frost layer. However, it has the following drawbacks in large-scale application: 1. The design and installation of evaporative coolers and refrigeration valve assemblies are difficult to standardize into a standardized process system: In typical cold storage facilities, multiple air coolers are connected in parallel, each with its own independent valve assembly and branch piping. Valves and pipes are installed on-site. Although many valves are involved, the refrigeration piping is relatively thin and not included in the pressure piping, thus it is not subject to oversight. Some construction companies use temporary designs and on-site installation to complete the work. This results in inconsistent design and construction quality of the air coolers and related valves, increasing the difficulty of construction management and creating potential risks.
[0004] 2. The control logic of the refrigeration valve assembly cannot be standardized: The form and function of each component of the refrigeration valve assembly are determined by each unit itself, and the relevant control logic cannot be standardized, which can lead to hidden dangers during commissioning and use, resulting in economic losses in the later stage. Utility Model Content
[0005] To address the above issues, a chiller system with an integrated control valve assembly is proposed.
[0006] The technical solution of this utility model is: a cold air blower system with integrated control valve group, including a liquid supply pipe, a hot gas pipe and a return gas pipe. One end of the liquid supply pipe is connected to the liquid refrigerant supply end, and the other end of the liquid supply pipe is connected to the heat exchange coil. A solenoid valve is provided on the liquid supply pipe. An electronic expansion valve is provided on the side of the solenoid valve close to the heat exchange coil, and a first filter is provided on the side of the solenoid valve away from the electronic expansion valve. One end of the hot gas pipe is connected to the compressor exhaust pipe, and the other end of the hot gas pipe is connected to the water receiving pan heating pipe. The other end of the water receiving pan heating pipe is connected to the liquid supply pipe between the electronic expansion valve and the heat exchange coil. A second filter is provided on the hot gas pipe, and a two-position solenoid valve is provided on the side of the second filter near the heat exchange coil. One end of the return pipe is connected to the compressor suction pipe, and the other end is connected to the heat exchange coil. A two-step solenoid valve is installed on the return pipe. A temperature sensor is installed on the side of the two-step solenoid valve near the heat exchange coil, and a pressure sensor is installed on the other side of the temperature sensor.
[0007] Preferably, the return pipe between the two-step solenoid valve and the temperature sensor is connected via a branch pipe to the liquid supply pipe between the first filter and the liquid refrigerant supply end.
[0008] Preferably, a second check valve is provided on the branch pipe.
[0009] Preferably, the pressure-conducting interface on the two-step solenoid valve is connected to the hot gas pipe between the second filter and the two-position solenoid valve.
[0010] Preferably, a first check valve is provided on the pipe between the water receiving pan heating pipe and the liquid supply pipe.
[0011] The beneficial effects of this utility model are as follows: This utility model provides an integrated control valve group for an air cooler system. Since the control valve group of the air cooler is integrated inside the fan casing, there is no need to configure complex control pipelines and valves during on-site installation, which reduces the amount of installation work and installation space, and also reduces installation costs and the risk of system failure due to improper installation. The control valve group can detect and adjust the operating status of the air cooler in real time, adjust the refrigerant flow in real time, improve the cooling efficiency, and accurately control the defrosting cycle and defrosting time, reducing temperature fluctuations and defrosting energy consumption. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the air cooler system structure with integrated control valve group of this utility model; Figure 2 This is a schematic diagram of the air cooler system with integrated control valve group according to this utility model.
[0013] The component names corresponding to the various reference numerals in the diagram are as follows: 1. Liquid supply pipe; 11. First filter; 12. Solenoid valve; 13. Electronic expansion valve; 2. Hot gas pipe; 21. Second filter; 22. Two-position solenoid valve; 23. First check valve; 24. Water tray heating pipe; 3. Gas return pipe; 31. Two-step solenoid valve; 32. Temperature sensor; 33. Pressure sensor; 4. Branch pipe; 41. Second check valve; 5. Air cooler. Detailed Implementation
[0014] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. This embodiment is based on the technical solution of the present invention and provides detailed implementation methods and specific operating procedures; however, the scope of protection of the present invention is not limited to the following embodiments.
[0015] refer to Figure 1 , 2 As shown in the figure, this application discloses an integrated control valve group air cooler system, including a liquid supply pipe 1, a hot gas pipe 2, and a return gas pipe 3. The liquid supply pipe 1 transports the condensed high-temperature and high-pressure liquid refrigerant storage tank to the air cooler 5. One end of the liquid supply pipe 1 is connected to the liquid refrigerant supply end, and the other end of the liquid supply pipe 1 is connected to the air cooler 5. A solenoid valve 12 is provided on the liquid supply pipe 1. An electronic expansion valve 13 is provided on the side of the solenoid valve 12 closest to the air cooler 5, and a first filter 11 is provided on the side of the solenoid valve 12 furthest from the electronic expansion valve 13. The use of the electronic expansion valve 13 provides a wide adjustment range and high adjustment accuracy, ensuring precise liquid supply and improving the heat exchange efficiency of the air cooler 5. Hot gas pipe 2 bypasses the high-temperature and high-pressure refrigerant gas discharged from the compressor to the air cooler 5 to melt the frost layer on its surface. One end of hot gas pipe 2 is connected to the compressor exhaust pipe, and the other end of hot gas pipe 2 is connected to the water receiving pan heating pipe 24 to prevent the defrosting water from freezing. The other end of the water receiving pan heating pipe 24 is connected to the liquid supply pipe 1 between the electronic expansion valve 13 and the heat exchange coil. A second filter 21 is provided on hot gas pipe 2, and a two-position solenoid valve 22 is provided on the side of the second filter 21 near the air cooler. A first check valve 23 is installed on the pipe between the water receiving pan heating pipe 24 and the liquid supply pipe 1; The return pipe 3 transports the low-temperature, low-pressure gaseous refrigerant formed after heat absorption and evaporation inside the air cooler 5 back to the compressor for compression. One end of the return pipe 3 is connected to the compressor suction pipe, and the other end is connected to the air cooler 5. A two-step solenoid valve 31 is installed on the return pipe 3. A temperature sensor 32 is installed on the side of the two-step solenoid valve 31 near the hot coil, and a pressure sensor 33 is installed on the other side of the temperature sensor 32. The temperature sensor 32 and the pressure sensor 33 are used to control the opening of the liquid supply electronic expansion valve and to monitor the operating status of the air cooler 5, control the defrosting time, reduce the useless heat emitted to the cold storage during hot defrosting, and reduce energy consumption. The hot gas pipe 2 solenoid valve adopts a two-position solenoid valve 22, and the return gas pipe 3 solenoid valve adopts a two-step solenoid valve 31. Both can be opened in two steps to eliminate high pressure pulses at the beginning and end of defrosting and stabilize the system operating conditions. The return pipe 3 between the two-step solenoid valve 31 and the temperature sensor 32 is connected to the liquid supply pipe 1 between the first filter 11 and the liquid refrigerant supply end through the branch pipe 4. The liquid refrigerant condensed in the heat exchange coil of the air cooler 5 during defrosting is transported to the liquid supply pipe 1 through the branch pipe 4 and diverted to other air coolers 5. A second check valve 41 is provided on the branch pipe 4. The pressure-conducting interface on the two-step solenoid valve 31 is connected to the hot air pipe 2 between the second filter 21 and the two-position solenoid valve 22 via a pipeline; the pressure introduced into the hot air pipe 2 provides a pressure source for the two-step solenoid valve 31 to open. The specific working method is as follows: 1) During refrigeration operation: Open the liquid supply solenoid valve 12 and the two-step solenoid valve 31; the high-pressure liquid refrigerant enters the heat exchange coil of the air cooler 5 after being throttled by the electronic expansion valve 13, and returns to the compressor through the return pipe after exchanging heat with the air and evaporating; the opening degree of the electronic expansion valve 13 is dynamically adjusted according to the real-time feedback of the temperature sensor 32 and the pressure sensor 33. 2) Once the frost thickness is determined to be within the acceptable range based on data from temperature sensor 32 and pressure sensor 33, the defrosting process is automatically initiated. 3) Close the liquid supply solenoid valve 12, and the axial fan will stop after a delay to ensure that the residual liquid refrigerant in the coil is completely evaporated; 4) Close the two-step solenoid valve 31. The two-position solenoid valve 22 of the hot gas pipe 2 is opened first to preheat by 20%. After the coil pressure is stable, it is fully opened. The high-temperature gaseous refrigerant enters the water receiving pan heating pipe 24 to make the air cooler 5 release heat to defrost. The condensate flows through the first check valve 23 into the liquid supply pipe and is diverted to other air coolers 5. After defrosting and draining are complete, close the two-position solenoid valve 22 and open the two-step solenoid valve 31 in stages (first 10%, then fully open when the pressure difference is ≤1.5 Bar); restart the liquid supply solenoid valve 12 and the system resumes the refrigeration cycle.
[0016] The beneficial effects are: This utility model discloses an integrated control valve group for an air cooler system. Since the control valve group of the air cooler is integrated inside the fan casing, there is no need to configure complex control pipelines and valves during on-site installation, which reduces the amount of installation work and installation space, and also reduces the installation cost and the risk of system failure due to improper installation. The control valve group can detect and adjust the operating status of the air cooler in real time, regulate the refrigerant flow in real time to improve the cooling efficiency, and accurately control the defrosting cycle and defrosting time to reduce temperature fluctuations and defrosting energy consumption.
[0017] It should be noted that the terms "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. The terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. "A plurality of" means two or more. "Installed," "connected," and "joined" should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral connection.
[0018] The above description is merely a preferred embodiment of this utility model and is not intended to limit this utility model in any form or substance. It should be noted that those skilled in the art can make various improvements and additions without departing from this utility model, and these improvements and additions should also be considered within the protection scope of this utility model. Any modifications, alterations, and equivalent changes made by those skilled in the art without departing from the spirit and scope of this utility model using the disclosed technical content are equivalent embodiments of this utility model. Furthermore, any modifications, alterations, and evolutions made to the above embodiments based on the essential technology of this utility model are still within the scope of the technical solution of this utility model.
Claims
1. A chiller system with an integrated control valve assembly, characterized in that, It includes a liquid supply pipe (1), a hot gas pipe (2), and a return gas pipe (3). One end of the liquid supply pipe (1) is connected to the liquid refrigerant supply end, and the other end of the liquid supply pipe (1) is connected to the heat exchange coil. A solenoid valve (12) is provided on the liquid supply pipe (1). An electronic expansion valve (13) is provided on the side of the solenoid valve (12) near the heat exchange coil. A first filter (11) is provided on the side of the solenoid valve (12) away from the electronic expansion valve (13). One end of the hot air pipe (2) is connected to the compressor exhaust pipe, and the other end of the hot air pipe (2) is connected to the water receiving pan heating pipe (24). The other end of the water receiving pan heating pipe (24) is connected to the liquid supply pipe (1) between the electronic expansion valve (13) and the heat exchange coil. A second filter (21) is provided on the hot air pipe (2), and a two-position solenoid valve (22) is provided on the side of the second filter (21) near the heat exchange coil. One end of the return pipe (3) is connected to the compressor suction pipe, and the other end of the return pipe (3) is connected to the heat exchange coil. A two-step solenoid valve (31) is provided on the return pipe (3). A temperature sensor (32) is provided on the side of the two-step solenoid valve (31) near the heat exchange coil, and a pressure sensor (33) is provided on the other side of the temperature sensor (32).
2. The air cooler system with integrated control valve assembly according to claim 1, characterized in that, The return pipe (3) between the two-step solenoid valve (31) and the temperature sensor (32) is connected to the liquid supply pipe (1) between the first filter (11) and the liquid refrigerant supply end via a branch pipe (4).
3. The air cooler system with integrated control valve assembly according to claim 2, characterized in that, The branch pipe (4) is equipped with a second check valve (41).
4. The air cooler system with integrated control valve assembly according to claim 1, characterized in that, The pressure-conducting interface on the two-step solenoid valve (31) is connected to the hot air pipe (2) between the second filter (21) and the two-position solenoid valve (22).
5. The air cooler system with integrated control valve assembly according to claim 1, characterized in that, A first check valve (23) is provided on the pipe between the water receiving pan heating pipe (24) and the liquid supply pipe (1).