An outdoor unit of an air-conditioning apparatus includes an outdoor unit main body, a compressor, an outdoor heat exchanger, an outdoor fan, an outdoor air temperature detection unit, and a control unit. The control unit stores an outdoor air temperature that is detected when the outdoor unit main body receives an operation stop signal, a temperature determination unit configured to determine whether the outdoor air temperature stored in the storage unit is less than a temperature threshold value when the outdoor unit main body receives an operation start signal, and an operation timing setting unit configured to select an operation mode of the compressor based on an outdoor air temperature detected by the outdoor air temperature detection unit after operation of the outdoor fan is resumed in a case where the temperature determination unit determines that the outdoor air temperature is less than the temperature threshold value.

An outdoor unit of an air-conditioning apparatus includes an outdoor unit main body, a compressor, an outdoor heat exchanger, an outdoor fan, an outdoor air temperature detection unit, and a control unit. The control unit stores an outdoor air temperature that is detected when the outdoor unit main body receives an operation stop signal, a temperature determination unit configured to determine whether the outdoor air temperature stored in the storage unit is less than a temperature threshold value when the outdoor unit main body receives an operation start signal, and an operation timing setting unit configured to select an operation mode of the compressor based on an outdoor air temperature detected by the outdoor air temperature detection unit after operation of the outdoor fan is resumed in a case where the temperature determination unit determines that the outdoor air temperature is less than the temperature threshold value.

An intelligent temperature adjustment control circuit includes a first, resistance sampling circuit, a second resistance sampling circuit, a current sampling circuit, a voltage sampling circuit and a thermocouple sensor, respectively connected to a heating wire. The thermocouple sensor is connected in turn with an analog-to-digital converter and a signal isolation driving circuit to collect real-time temperature data of the heating wire and then transmit it to a main control unit after being processed. The main control unit is configured to determine the received initial resistance value, the real-time resistance value, the real-time current value, the real-time voltage value and the voltage digital signal, and then send a control signal to a main driving circuit according to a judgment result of the received initial resistance value, the real-time resistance value, the real-time current value, the real-time voltage value and the voltage digital signal, that have been determined.

An intelligent temperature adjustment control circuit includes a first, resistance sampling circuit, a second resistance sampling circuit, a current sampling circuit, a voltage sampling circuit and a thermocouple sensor, respectively connected to a heating wire. The thermocouple sensor is connected in turn with an analog-to-digital converter and a signal isolation driving circuit to collect real-time temperature data of the heating wire and then transmit it to a main control unit after being processed. The main control unit is configured to determine the received initial resistance value, the real-time resistance value, the real-time current value, the real-time voltage value and the voltage digital signal, and then send a control signal to a main driving circuit according to a judgment result of the received initial resistance value, the real-time resistance value, the real-time current value, the real-time voltage value and the voltage digital signal, that have been determined.

A defrosting apparatus includes: a heating unit including a heater case and a heater, where the heater case defines an inner flow path having an inlet and an outlet at ends thereof, and the heater is mounted in the heater case to heat a working fluid within the inner flow path; and a heat pipe inserted into the inside of the heater case through the inlet and the outlet, and which has at least a part thereof disposed to be adjacent to a cooling pipe of an evaporator such that heat is radiated to the cooling pipe of the evaporator by means of the working fluid at a high temperature that is heated by the heater and then is transferred, where the heater is configured to stop emit heat at a preset temperature or higher, since an electric current is suppressed due to a sharp increase in resistance.

The present disclosure relates to a control method of a gas furnace comprising a step for measuring an indoor temperature, a step for comparing the indoor temperature with a set temperature for heating, and a step for operating the gas furnace in weak heating with a predetermined heating capacity which is lower than a maximum heating capacity of the gas furnace, when the set temperature for heating is higher than the indoor temperature by a temperature value which is less than a predetermined temperature value, wherein the predetermined heating capacity for weak heating is maintained at a current heating capacity for weak heating, when the gas furnace operates in weak heating, and when an operating duration with the current heating capacity for weak heating is less than a first time value.

The invention relates to a thermal control system for controlling the temperature of a fluid. In particular, the invention relates to a control system having at least two heating elements, at least one of which is used for directly or indirectly heating a fluid, and at least one of which is used for heating a thermal probe used to determine the temperature of the fluid. The heating systems are controlled by at least one feedback controller.

The invention relates to a thermal control system for controlling the temperature of a fluid. In particular, the invention relates to a control system having at least two heating elements, at least one of which is used for directly or indirectly heating a fluid, and at least one of which is used for heating a thermal probe used to determine the temperature of the fluid. The heating systems are controlled by at least one feedback controller.

The invention relates to a thermal control system for controlling the temperature of a fluid. In particular, the invention relates to a control system having at least two heating elements, at least one of which is used for directly or indirectly heating a fluid, and at least one of which is used for heating a thermal probe used to determine the temperature of the fluid. The heating systems are controlled by at least one feedback controller.

The invention relates to a thermal control system for controlling the temperature of a fluid. In particular, the invention relates to a control system having at least two heating elements, at least one of which is used for directly or indirectly heating a fluid, and at least one of which is used for heating a thermal probe used to determine the temperature of the fluid. The heating systems are controlled by at least one feedback controller.