Patent ID: 6945324

Claim:
A controlling method for the discharge of a coolant medium in a heat exchange wind box, comprising the steps of: detecting an environmental heat energy value of a freezing and air-conditioning area and inputting said detected environmental heat energy value into a controller; comparing said detected environmental heat energy value and a set heat energy value and corresponding signals generated by a set mode; and, simultaneously controlling a revolving speed of a fan motor and a discharge volume of an adjustable-discharge pump responsive to a result of said comparison, said step of simultaneously controlling including the steps of: operating said revolving speed of said fan motor and said discharge volume of said adjustable-discharge pump at maximum values when supplying cool air and when said detected environmental heat energy value is larger than said set heat energy value plus a set difference; operating said revolving speed of said fan motor and said discharge volume of said adjustable-discharge pump in direct proportion to said detected environmental heat energy value when supplying cool air and when said detected environmental heat energy value is larger than said set heat energy value but smaller than said set heat energy value plus said set difference; operating said revolving speed of said fan motor and said discharge volume of said adjustable-discharge pump at minimum values when supplying cool air and when said detected environmental heat energy value is smaller than or equal to said set heat energy value; operating said revolving speed of said fan motor and said discharge volume of said adjustable-discharge pump at maximum values when supplying hot air and when said detected environmental heat energy value is smaller than or equal to said set heat energy value minus said set difference; and operating said revolving speed of said fan motor and said discharge volume of said adjustable-discharge pump in inverse proportion to said detected environmental heat energy value when supplying hot air and when said detected environmental heat energy value is larger than said set heat energy value minus said set difference but smaller than said set heat energy value; operating said revolving speed of said fan motor and said discharge volume of said adjustable-discharge pump at minimum values when supplying hot air and when said detected environmental heat energy value is larger than or equal to said set heat energy value.