CN-121979337-A - Anti-condensation control method for CDU liquid cooling system and CDU liquid cooling system

Abstract

The application provides a condensation prevention control method of a CDU liquid cooling system and the CDU liquid cooling system, wherein the method comprises the steps that a controller receives temperature and humidity data transmitted by a temperature and humidity sensor and liquid supply temperature data transmitted by a first temperature sensor, and calculates the current dew point temperature by utilizing the temperature and humidity data; if the current liquid supply temperature meets the dew point temperature condition according to the liquid supply temperature data, acquiring a dew point comparison temperature corresponding to the current dew point temperature and a liquid supply temperature target value, and controlling the opening of the electric valve according to the comparison result of the dew point comparison temperature and the liquid supply temperature target value, wherein the dew point temperature condition comprises that the current liquid supply temperature is smaller than a dew point temperature threshold value in a preset time period, and the dew point comparison temperature is greater than the dew point temperature threshold value and is greater than the dew point temperature. The embodiment of the application can effectively avoid condensation on the surface of the secondary side pipeline, reduce the risks of electrical short circuit and equipment corrosion and improve the safety of the equipment.

Inventors

• CHEN HONGNIAN
• LI CHENG

Assignees

• 远地(广州)数字科技有限公司

Dates

Publication Date

20260505

Application Date

20260206

Claims (10)

1. 1. The utility model provides a CDU liquid cooling system prevents condensation control method which characterized in that is used for being equipped with primary side, secondary side, the CDU liquid cooling system of controller, the primary side is equipped with the motorised valve that is used for controlling the flow, the secondary side is equipped with the temperature and humidity sensor that is used for detecting ambient temperature and detects the first temperature sensor that supplies liquid temperature, the controller respectively with motorised valve temperature and humidity sensor connects, the method includes: the controller receives temperature and humidity data transmitted by the temperature and humidity sensor and liquid supply temperature data transmitted by the first temperature sensor, and calculates the current dew point temperature by utilizing the temperature and humidity data; If the current liquid supply temperature meets the dew point temperature condition according to the liquid supply temperature data, acquiring a dew point comparison temperature corresponding to the current dew point temperature and a liquid supply temperature target value, and controlling the opening of the electric valve according to a comparison result of the dew point comparison temperature and the liquid supply temperature target value, wherein the dew point temperature condition comprises that the current liquid supply temperature is smaller than a dew point temperature threshold value within a preset time period, and the dew point comparison temperature is more than the dew point temperature threshold value.
2. 2. The CDU liquid cooling system condensation prevention control method according to claim 1, wherein calculating a current dew point temperature using the temperature and humidity data comprises: determining the current dry bulb temperature and relative humidity according to the temperature and humidity data, and calculating the actual water vapor pressure based on the dry bulb temperature and the relative humidity; and calculating the current dew point temperature according to the actual water vapor pressure.
3. 3. The CDU liquid cooling system anti-condensation control method according to claim 2, wherein the calculating the actual water vapor pressure based on the dry bulb temperature and the relative humidity comprises: Calculating the current saturated water vapor pressure according to the dry bulb temperature; The current actual water vapor pressure is calculated based on the relative humidity and the saturated water vapor pressure.
4. 4. The CDU liquid cooling system condensation prevention control method according to claim 1, wherein the CDU liquid cooling system further comprises a display screen, the controller is connected with the display screen, and the judging of the dew point temperature condition comprises: Determining a dew point temperature threshold based on the current dew point temperature; if the current liquid supply temperature is smaller than the dew point temperature threshold value and the time smaller than the dew point temperature threshold value reaches the first preset time, determining that the dew point temperature condition is met, entering an anti-condensation mode, and displaying alarm information by using the display screen.
5. 5. The CDU liquid cooling system condensation prevention control method according to claim 4, wherein controlling the opening degree of the electric valve according to the comparison result between the dew point comparison temperature and the supply liquid temperature target value comprises: And if the dew point comparison temperature is determined to be greater than the liquid supply temperature target value, determining the dew point comparison temperature as a temperature adjustment target value, and adjusting the opening of the electric valve based on the temperature adjustment target value.
6. 6. The CDU liquid cooling system anti-condensation control method according to claim 5, wherein adjusting the opening degree of the electric valve based on the temperature adjustment target value comprises: reducing the opening of the electric valve based on the temperature adjustment target value, and detecting the current liquid supply temperature of the secondary side; and if the current liquid supply temperature meets the exit condition, exiting the anti-condensation mode, and stopping adjusting the opening.
7. 7. The CDU liquid cooling system anti-condensation control method according to claim 6, wherein determining that the current supply temperature satisfies an exit condition comprises: and if the difference value between the current liquid supply temperature and the current dew point temperature in the second preset time is larger than or equal to the dew point control temperature or the current liquid supply temperature exceeds the highest temperature, determining that the exit condition is met.
8. 8. The CDU liquid cooling system condensation prevention control method according to claim 5, wherein controlling the opening degree of the electric valve according to the comparison result of the dew point comparison temperature and the supply liquid temperature target value comprises: and if the dew point comparison temperature is less than or equal to the liquid supply temperature target value, determining the liquid supply temperature target value as a temperature adjustment target value, and controlling the opening of the electric valve based on the temperature adjustment target value.
9. 9. The CDU liquid cooling system condensation prevention control method according to claim 5, wherein the adjusting of the opening degree of the electric valve comprises: reducing the opening lower limit of the electric valve to generate a new opening adjusting range; and gradually adjusting the opening of the electric valve according to the new opening adjusting range and the current liquid supply temperature of the secondary side.
10. 10. A CDU liquid cooling system, characterized in that the CDU liquid cooling system comprises a primary side, a secondary side and a controller, the controller is connected with an electric valve in the primary side, a temperature and humidity sensor in the secondary side and a first temperature sensor, and the CDU liquid cooling system realizes the method according to any one of claims 1-9 through the controller.

Description

Anti-condensation control method for CDU liquid cooling system and CDU liquid cooling system Technical Field The application relates to the technical field of CDU (compact digital unit), in particular to a condensation prevention control method of a CDU liquid cooling system and the CDU liquid cooling system. Background CDU (Cooling Distribution Unit) is an integrated device in the liquid cooling system, which is responsible for cooling liquid circulation, temperature regulation, pressure management, filtration and monitoring. The device is equivalent to a heart and a dispatching center of a liquid cooling system, is connected with a cooling liquid supply object on a primary side, such as a water chilling unit and a load on a secondary side, such as a server cold plate, an immersed liquid cooling tank and other load ends, and realizes efficient, stable and controllable heat transfer. In the prior art, the power of the load end is changed, so that the generated heat is correspondingly changed, and the primary side of the liquid cooling system still provides cooling liquid with fixed flow, so that the temperature of the liquid supply of the secondary side is increased or decreased due to the change of the power of the load end. In the process of reducing the liquid supply temperature, the liquid supply temperature is possibly lower than the dew point temperature in the environment, so that condensation is generated on the surface of a pipeline on the secondary side, and risks such as electrical short circuit and equipment corrosion are caused. Disclosure of Invention The embodiment of the application provides a condensation prevention control method of a CDU liquid cooling system and the CDU liquid cooling system, which can solve the problems that in the existing mode, the primary side flow is fixed, the secondary side liquid supply temperature is easily lower than the dew point temperature, the surface of a secondary side pipeline is exposed, and electrical short circuit and equipment corrosion are caused. In order to achieve the object, embodiments of the present application provide the following solutions. According to an aspect of the embodiment of the present application, there is provided a CDU liquid cooling system condensation preventing control method, for a CDU liquid cooling system provided with a primary side, a secondary side, and a controller, wherein the primary side is provided with an electric valve for controlling flow, the secondary side is provided with a temperature and humidity sensor for detecting ambient temperature and a first temperature sensor for detecting liquid supply temperature, and the controller is respectively connected with the electric valve and the temperature and humidity sensor, the method includes: the controller receives temperature and humidity data transmitted by the temperature and humidity sensor and liquid supply temperature data transmitted by the first temperature sensor, and calculates the current dew point temperature by utilizing the temperature and humidity data; If the current liquid supply temperature meets the dew point temperature condition according to the liquid supply temperature data, acquiring a dew point comparison temperature corresponding to the current dew point temperature and a liquid supply temperature target value, and controlling the opening of the electric valve according to a comparison result of the dew point comparison temperature and the liquid supply temperature target value, wherein the dew point temperature condition comprises that the current liquid supply temperature is smaller than a dew point temperature threshold value within a preset time period, and the dew point comparison temperature is more than the dew point temperature threshold value. In one possible implementation, calculating the current dew point temperature using the temperature and humidity data includes: determining the current dry bulb temperature and relative humidity according to the temperature and humidity data, and calculating the actual water vapor pressure based on the dry bulb temperature and the relative humidity; and calculating the current dew point temperature according to the actual water vapor pressure. In one possible implementation, the calculating the actual water vapor pressure based on the dry bulb temperature and the relative humidity includes: Calculating the current saturated water vapor pressure according to the dry bulb temperature; The current actual water vapor pressure is calculated based on the relative humidity and the saturated water vapor pressure. In one possible implementation manner, the CDU liquid cooling system further includes a display screen, the controller is connected to the display screen, and the judging of the dew point temperature condition includes: Determining a dew point temperature threshold based on the current dew point temperature; if the current liquid supply temperature is smaller than the dew point temperatu