Direct cooling system, refrigerant dryness control method and device thereof and storage medium

By obtaining the current operating conditions of the refrigerant in the direct cooling system and the specific enthalpy of the cold plate branch outlet, the actual refrigerant dryness is calculated and the branch valves are controlled, thus solving the complex problem of refrigerant dryness control and improving the temperature uniformity and energy efficiency of the battery cell module.

CN122348312APending Publication Date: 2026-07-07GD MIDEA HEATING & VENTILATING EQUIP CO LTD +1
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Patent Information

Application Number
CN202510019866.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-01-06
Publication Date
2026-07-07

AI Technical Summary

Technical Problem

In battery heat dissipation, the refrigerant dryness control of direct cooling is complex, requires multiple parameters, and is difficult to commercialize.

Method used

By obtaining the current operating conditions of the direct cooling system, the specific enthalpy of the refrigerant in its gaseous and liquid states under saturated evaporation pressure is calculated. Combined with the specific enthalpy at the outlet of the cold plate branch, the actual refrigerant dryness is obtained, and the branch control valve is controlled to adjust the refrigerant flow rate, thus simplifying the control of refrigerant dryness.

Benefits of technology

This enables simplified control of refrigerant dryness in the direct cooling system, ensuring temperature uniformity of the battery cell modules and improving system energy utilization efficiency.

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Abstract

The invention discloses a direct cooling system, a refrigerant dryness control method and device thereof and a storage medium, the direct cooling system comprises a heat regenerator, a main valve, a heat regeneration control valve and an indoor unit module, the number of cold plate branches of the indoor unit module corresponds to the number of battery cell blocks, each cold plate branch comprises a branch cold plate and a branch control valve, and the branch cold plate is connected with the main valve. The method comprises the steps that the gas-state specific enthalpy of a refrigerant under the saturated evaporation pressure and the liquid-state specific enthalpy of the refrigerant under the saturated evaporation pressure are obtained, the refrigerant specific enthalpy of an outlet of the evaporation side of each cold plate branch is obtained, then the actual refrigerant dryness of each cold plate branch is obtained, and when the current working condition is the refrigeration working condition, the refrigerant on the inlet side of a heat regenerator is supercooled, and the actual refrigerant dryness of each cold plate branch is obtained. And according to the actual refrigerant dryness of each cold plate branch, a branch control valve of each cold plate branch is controlled, so that the refrigerant flow of each cold plate branch is adjusted. Therefore, refrigerant dryness control parameters are simplified, refrigerant dryness control over the direct cooling system is achieved, and therefore temperature uniformity control over the battery cell blocks is achieved.
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