Phase change cooling device and control method

Abstract

Provided are a phase change cooling device and a control method, whereby stable high-efficiency cooling performance can be obtained according to heat exchange performance. This phase change cooling device includes: a heat receiver which accommodates a coolant and receives heat from a heat generation body which is to be cooled; a heat radiator which radiates the heat of a coolant vapor of the coolant gasified by receiving heat by means of the heat receiver, and recirculates a liquefied liquid coolant to the heat receiver; a valve for controlling the flow rate of the liquid coolant; and a control means for controlling the opening degree of the valve, wherein the control means controls the opening degree of the valve on the basis of an exhaust temperature, which is the temperature after being discharged from the heat receiver, and the temperature in the vicinity of the heat radiator.

1 . A phase change cooling device, comprising:
 a heat receiver for accommodating a coolant and receiving heat from a heat generation body to be cooled;   a heat radiator for radiating heat of a coolant vapor of the coolant gasified by receiving heat in the heat receiver, and recirculating a liquefied liquid coolant to the heat receiver;   a valve for controlling a flow rate of the liquid coolant; and   a control unit that controls an opening degree of the valve, wherein   the control unit controls an opening degree of the valve by referring to an exhaust air temperature being a temperature of air after being discharged from the heat receiver, and a temperature in a vicinity of the heat radiator.   
     
     
         2 . The phase change cooling device according to  claim 1 , wherein
 the control unit controls an opening degree of the valve by further referring to temperatures of air sent through the heat generation body, which are an inflow-side temperature toward the heat generation body and an outflow-side temperature from the heat generation body.   
     
     
         3 . The phase change cooling device according to  claim 1 , wherein
 the control unit controls an opening degree of the valve by stepwise updating a target temperature of the exhaust air temperature of the heat receiver for each temperature in a vicinity of the heat radiator.   
     
     
         4 . The phase change cooling device according to  claim 3 , wherein
 the control unit performs PID control on an opening degree of the valve in such a way that the exhaust air temperature of the heat receiver becomes closer to the target temperature.   
     
     
         5 . The phase change cooling device according to  claim 4 , wherein
 the control unit stepwise increases an opening degree of the valve in such a way that a difference between the exhaust air temperature of the heat receiver and the target temperature becomes equal to or less than a threshold value.   
     
     
         6 . The phase change cooling device according to  claim 4 , wherein
 the control unit stepwise decreases an opening degree of the valve in such a way that a difference between the exhaust air temperature of the heat receiver and the target temperature becomes equal to or less than a threshold value.   
     
     
         7 . A control method of a phase change cooling device that includes a heat receiver for accommodating a coolant and receiving heat from a heat generation body to be cooled, a heat radiator for radiating heat of a coolant vapor of the coolant gasified by receiving heat in the heat receiver, and recirculating a liquefied liquid coolant to the heat receiver, and a valve for controlling a flow rate of the liquid coolant, the control method comprising:
 controlling an opening degree of the valve by referring to an exhaust air temperature being a temperature of air after being discharged from a heat receiver, and a temperature in a vicinity of the heat radiator.