Self-adaptive control method and device for water temperature in water tank

Abstract

The invention discloses an adaptive control method and device of water temperature in a water tank. The adaptive control method comprises the following steps: paraffin for sensing water temperature in the water tank is arranged in a control valve, and the phase change of the paraffin can be changed along with the change of the water temperature to cause the volume of the paraffin to be changed; when the water temperature rises, the volume of the paraffin expands due to the rise of the water temperature to reduce a valve port of the control valve, so as to increase pressure of oil flowing out from the valve port to enable the rotating speed of a fan to be accelerated, so that the cooling down role of the fan can be increased, and accordingly, the water temperature in the water tank drops; after the water temperature drops, the volume of the paraffin reduces along with the dropping of the water temperature to increase the valve port of the control valve, so as to reduce pressure of the oil flowing out from the valve port to enable the rotating speed of the fan to be reduced, and accordingly, the purpose of the adaptive control of the water temperature by the paraffin can be realized. The method endows the control valve with an adaptive function, so that a close-loop control system for measuring and feeding back temperature in a water temperature control system can be omitted. Therefore, the control valve is not easy to damage, simple, convenient and reliable, and can greatly reduce failure rate.

Description

technical field [0001] The invention relates to a cooling control method and device, in particular to an adaptive control method and device for water temperature in a water tank. Background technique [0002] At present, the cooling system of large motor vehicles usually adopts the cooling control method of electric measurement and electronic control and mechanical combination matching. There are two main methods: one is composed of temperature sensors, temperature measuring and Electronic control equipment, although this method is simple, its biggest disadvantage is that the control form is switch value control, which cannot be automatically adjusted with the change of system calorific value; the other is to use proportional cooling control method, which is composed of Compared with the previous method, this method has the advantages of automatic adjustment with the change of system calorific value and high control accuracy. However, due to its many components, the failure...

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Problems solved by technology

[0002] At present, the cooling system of large motor vehicles usually adopts the cooling control method of electric measurement and electronic control and mechanical combination matching. There are two main methods: one is composed of temperature sensors, temperature measuring and Electronic control equipment, although this method is simple, its biggest disadvantage is that the control form is switch value control, which cannot be automatically adjusted with the change of system calorific value; the other is to use proportional cooling control method, which is composed of Compared with the previous method, this method has the advantages of automatic adjustment with the change of system calorific value and high control accuracy. However, due to its many components, the failure rate is also high

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