60results about How to "Lower the outlet temperature" patented technology

The invention provides a control method for slowing down air conditioner defrosting attenuation. The control method comprises the steps: S0, the air conditioner enters a heating mode; S1, the operation frequency of an air conditioner compressor is controlled according to the outdoor coil pipe temperature and the change rate thereof; S2, the rotating speed of an outdoor fan of the air conditioner is controlled according to the difference value between the outdoor environment temperature and the outdoor coil pipe temperature; and S3, whether a defrosting mode is started or not is determined according to the indoor coil pipe temperature. Therefore, under the condition that the cost of the air conditioner is not increased, the frequency of the compressor and the rotating speed of the outdoor fan are set to control defrosting and slow down heating attenuation of the air conditioner through the temperature change rate of the outdoor coil pipe, the difference value between the outdoor environment temperature and the outdoor coil pipe temperature, meanwhile, the air outlet temperature is ensured not to be too low, and the somatosensory comfort is improved.

Provided is a controller for use with a gas turbine engine, which ensures a stable combustion regardless of the deterioration of the catalyst and elevated characteristics of the exhaust gas. The controller 6 is used in the engine which comprises a combustor 2 for combusting a mixture of compressed air from a compressor 1 and a fuel under the existence of catalyst, the combustor having a catalytic combustion unit 21 bearing the catalyst and a pre-burner 7 provided on an upstream side of the catalytic combustion unit with respect to a flow of the compressed air for supplying and combusting a pre-heating fuel PF with the compressed air CA. The controller comprises a memory 6c for memorizing an initial temperature difference D between inlet and outlet temperatures t1, t2 measured at inlet and outlet of the catalytic combustion unit with non-deteriorated catalyst accommodated therein, and a pre-burner control for calculating a present temperature difference between the inlet and outlet temperatures measured in an operation of the gas turbine engine and controlling an amount of the fuel to be supplied to the pre-burner according to a deterioration Δd of the catalyst which is provided by a difference between the initial and present temperature differences D and d.

The invention provides a vertical air conditioner indoor unit. The vertical air conditioner indoor unit comprises a shell, an air duct, a flow guide part and an air inducing channel; the shell is provided with an air supply opening, a first air inlet and a second air inlet; the inner wall, close to an air outlet, of the air duct is in a gradually-shrinking shape with a flow cross section graduallybecoming smaller in the airflow direction; the flow guide part is arranged in the air duct, an annular air outlet gap is defined by the flow guide part and a gradually-reduced part of the air duct, and the flow guide part is used for guiding airflow to the annular air outlet gap so that the airflow can be gradually gathered towards the center of the airflow under the guidance of the inner wall ofthe air duct and flow out of the air outlet and the air supply opening; and the air inducing channel is formed between the shell and the air duct and is provided with an inlet end communicated with the second air inlet and an outlet end communicated with the air supply opening, and indoor air enters the shell through the second air inlet and is guided to the air supply opening through the air inducing channel. The vertical air conditioner indoor unit is stronger in wind power and farther in air supply distance.

An ultraslow-temperature air cooler of circulation type is prepared for setting evaporator of single stage compression refrigerating system and evaporator of cascade refrigerating system at front and back in air dust, arranging air filter at air inlet position of said air dust and fan at air outlet position of said air dust, connecting air inlet of air dust to cold air inlet of corollary device and air inlet of air dust to tail-gas outlet of corollary device.

The invention relates to the technical field of renewable energy, which belongs to an improved water evaporation refrigeration air conditioner, in particular to a progressive indirect evaporative cooler, which comprises a water distributor arranged above the indirect evaporative cooler; a water tank is arranged below the indirect evaporative cooler, wherein, the water tank supplies water to the water distributor via a water pump; the indirect evaporative cooler is provided with a secondary air blowing surface, which is a slanted surface; dry channels are arranged on the slanted surface, and extend forwards to divide sensible cooling primary air flow into primary air and secondary air, wherein, the primary air flows in the through dry channels, and the primary air exhausted from the vents of each phase of the dry channel on the slanted surface is used as the secondary air, which flows into corresponding wet channels. The invention improves the heat transfer efficiency through using less amount of secondary exhaust to obtain lower exhaust temperature of the final primary air after sensible cooling.

The invention discloses a latent heat energy saving device of an outdoor machine of an air conditioning unit. The latent heat energy saving device of the outdoor machine of the air conditioning unit comprises a multi-hole hydrophilic material module, a water circulation system and a monitor, wherein the multi-hole hydrophilic material module comprises multi-hole hydrophilic materials, a water spraying disk, a water collecting disk, a water spray nozzle, a metal plate connection plate or a soft connection plate and a temperature-humidity sensor; the water circulation system comprises a water tank, a pump group, a spraying water supply pipe, a water supply pipe of the water tank, a return water pipe, a draining pipe, a magnetic valve of the spraying water supply pipe, a ball valve of the water supply pipe of the water tank, a magnetic valve of the draining pipe and a float switch; the water circulation system is used for providing circulation water source for the multi-hole hydrophilic material module; the multi-hole hydrophilic material module is used for providing water screens of a wind inlet side of the outdoor machine; and the temperature-humidity sensor, the magnetic valve of the spraying water supply pipe, the magnetic valve of the spraying water supply pipe, the magnetic valve of the draining pipe and the pump group are correspondingly connected with the monitor. The latent heat energy saving device is capable of effectively reducing the air inlet temperature of the outdoor machine of the air conditioning unit after being connected with the outdoor machine, accordingly the operation efficiency of an air conditioner is reduced, electric power is saved, and 18 to 36 % power is saved.

The invention provides a low-grade afterheat recycling type energy-saving dehumidifying unit which can be used in a high-temperature and high-humidity place. The low-grade afterheat recycling type energy-saving dehumidifying unit comprises a dehumidifying rotating wheel, a first driving mechanism for driving the dehumidifying rotating wheel to rotate, a treatment fan, a regeneration fan, a heat recycling rotating wheel, a second driving mechanism for driving the heat recycling rotating wheel to rotate, a surface air cooler arranged on a treatment air flowing channel, a cooling water tower connected to the surface air cooler and a regeneration heater arranged on a regenerated air flowing channel, wherein treatment air flows through a first treatment region of the dehumidifying rotating wheel, a second treatment region of the heat recycling rotating wheel and the surface air cooler in sequence under the driving of the treatment fan to form the treatment air flowing channel; regenerated air flows through a second regeneration region of the heat recycling rotating wheel, the regeneration heater and a first regeneration region of the dehumidifying rotating wheel in sequence under the driving of the regeneration fan to form the regenerated air flowing channel; dehumidifying rotating wheel regeneration is realized by using low-grade afterheat, so that the final air outlet temperature is reduced, and the energy-efficiency ratio of dehumidifying equipment is obviously increased.

The invention provides a control method and system used for fast cooling and a movable air-conditioner. According to the control method used for fast cooling, the purpose of quickly lowering the wind outlet temperature can be achieved by controlling the three parameters including the rotating speed of a lower motor, the rotating speed of a water collecting motor and the opening degree of a throttling valve. Hence, the local space around a wind outlet can be cooled within a shorter time, the fast cooling requirement of users can be met, and the product using comfort of the users is improved.

The invention provides an air-conditioning adjustment method and system based on a smart bracelet. The method include the steps that the smart bracelet worn by a user and a thermal imaging sensor areused for collecting data of the user and sending the collected data to an air conditioner; and the air conditioner processes the received data, and adjusts an operation state of the air conditioner according to processing results of the data. According to the air-conditioning adjustment method and system, the thermal imaging sensor is used for determining the position of a person and the body surface temperature, a current state of the person is determined through the data of the smart bracelet to control the air conditioner to adjust the temperature and air supply angle, when the user is excited, the air outlet temperature can be reduced, and when the user is in deep sleep, the air outlet temperature can be raised appropriately; and combined with a backflow mechanism, cold wind is prevented from directly blowing on a human body. A control method can precisely reduce the temperature around the human body, avoids large-area cooling of a whole room and saves energy, during heating, the temperature can also be precisely controlled to ensure comfort of the environment around the human body.

The invention relates to a dehumidification method for an air conditioner, and the air conditioner. The dehumidification method comprises the following steps: controlling the air conditioner to run under a dehumidification mode; acquiring an air outlet temperature RT at an air outlet port of an indoor unit of the air conditioner, and comparing the air outlet temperature RT with a set temperature ST at the air outlet port to obtain temperature difference E=ST-RT; and controlling to adjust the air outlet temperature RT to enable the temperature difference E to be equal to 0. The dehumidificationmethod aims at solving the problem of fluctuation of the air outlet temperature caused due to dehumidification of an air conditioner in the prior art, realizes uniform and stable air outlet temperature, and increases the comfort degree of a user in a room.

The invention discloses a heat-recovery fresh air ventilator. The heat-recovery fresh air ventilator comprises a heat-recovery ventilator body, an air supply fan and an exhaust fan. The heat-recovery ventilator body is in a long strip shape. An air port of the air supply fan faces the left side of the heat-recovery ventilator body. An air port of the exhaust fan faces the right side of the heat-recovery ventilator body. The heat-recovery fresh air ventilator is characterized by further comprising a condensate pipe, a wet film cooling system and a heat exchange core body. The wet film cooling system comprises a wet film and a water distributor. A water inlet pipe of the condensate pipe is arranged at the top end of the wet film. A condensate plate is arranged at the bottom of the wet film. The bottom end of a drain pipe of the condensate pipe is arranged in the condensate plate. The heat exchange core body is connected to the middle portion of the heat-recovery ventilator body in a clamped mode. The air supply fan and the exhaust fan are arranged on the left side and the right side of the heat exchange core body correspondingly. The heat-recovery fresh air ventilator with the wet film humidifying and cooling functions is applied to a fresh air ventilating system, the air outlet temperature of the fresh air ventilator is decreased, and the fresh air load is reduced; and the cold energy in condensate of an air conditioner is recycled, and the cooling capacity is improved.

The invention discloses a heat recovering fresh air machine which comprises a return air inlet, a return air channel, a fresh air channel, a heat exchange core body, a wet film and a water mist spraying device, wherein the return air channel communicates with the return air inlet; the heat exchange core body is used for realizing heat exchange between return air in the return air channel and fresh air in the fresh air channel; the wet film is arranged in the return air channel and is located in a part between the return air inlet and the heat exchange core body; the water mist spraying device is arranged in the return air channel and is located in a part between the wet film and the heat exchange core body; in the heat exchange core body, fresh air and return air flow in a cross flow manner and are separated through a hydrophilic aluminum foil, the fresh air is in direct contact with one face of the hydrophilic aluminum foil while the return air is in contact with another face of the hydrophilic aluminum foil, and the wet film and water mist generated by the water mist spraying device form a liquid thin layer on the surface of the other surface of the hydrophilic aluminum foil. By adopting wet film pre-cooling combined with indirect evaporative cooling, the heat recovering efficiency is improved. Compared with a conventional sensible heat recovering fan, the all heat recovery efficiency in a refrigerating working condition in summer can be increased from 30% to 80%, and the sensible heat recovery efficiency is increased from 65% to 140%.

The invention relates to a prefabricated duplex block concrete construction mixing ratio which is prepared by uniformly stirring the following raw materials according to the following ratio through a concrete stirring machine, wherein the bulk density is 2300-2500kg / m<3>, and the specific mixing ratio is as follows: 350-370kg / m<3> of cement, 770-790kg / m<3> of sand, 620-650kg / m<3> of broken stones 1, 415-435kg / m<3> of broken stones 2, 8.80-9.20kg / m<3> of a polycarboxylic high-performance water reducer, 60-80kg / m<3> of fly ash and 160-170kg / m<3> of water. A manufacturing technology comprises the following steps: sequentially adding the broken stones 1, the broken stones 2, the cement, the fly ash, the sand and the water in a stirring tank, and finally adding the polycarboxylic high-performance water reducer; and stirring for 90-120s after addition is finished, and finally forming a mixture with the 28d strength greater than or equal to 40MPa, the collapsing degree being 140-160mm and the out-of-machine temperature of a mixture lower than 30 DEG C. The prefabricated duplex block concrete construction mixing ratio can solve the problem of concrete quality such as concrete bubbles, cracking, cracks or the like and is suitable for regions with the temperature being 30-40 DEG C.

The invention discloses a drainage pipe and a dehumidifier. An inner sleeve structure and an outer sleeve structure are adopted by the drainage pipe, and an inner-layer pipeline and an outer-layer pipe each are provided with inlets and outlets. The drainage pipe structure of the condensate water is divided into the inner-layer pipeline and the outer-layer pipeline, the inner-layer pipeline is connected with the exhaust port of the compressor and is used for circulating a high-temperature refrigerant, and the outer-layer pipeline is connected with a water receiving disc of an evaporation heat exchanger of the dehumidifier for circulating condensed water, so that the high-temperature refrigerant at the exhaust port of the low-temperature condensate water and the high-temperature refrigerantof the exhaust port of the compressor are converged and subjected to heat exchange, the exhaust temperature of the compressor can be effectively reduced, and the working load of the condensation heatexchanger is further reduced. On the premise that any energy consumption is not increased, the discharged energy is reused, and the effect of reducing the air outlet temperature of the condensation heat exchanger is achieved. The drainage pipe is simple in structure and easy to produce and apply in batches.

The invention relates to a control method and device of an air conditioning system. The method includes: acquiring the water temperature parameter of the air conditioning system; acquiring a preset value; comparing the water temperature parameter with the preset value, and controlling the operation of the outdoor unit of the air conditioning system according to the comparison result. The method has the advantages that water temperature parameter monitoring is added into the modularized air conditioning system, the normal operation mode is switched into a high-water-temperature operation mode when the water temperature parameter is higher than the preset value, and the system can easily trigger more outdoor units to participate in the operation to increase the area of outdoor heat exchangers; by the method, condensation pressure increasing during heat exchanging can be inhibited effectively, excessively high pressure is avoided, and refrigerant circulating quantity can be effectively improved due to the fact that more outdoor units participate in the system circulation to fast lower the temperature of the air discharged by indoor units.

The invention provides a control method and a device for improving air conditioner heating comfort and an air conditioner, and belongs to the technical field of air conditioners. The control method comprises the steps that a heating mode is opened, a gear signal A of an inner draught fan is received, a temperature Ta of an inner disk is detected and obtained, and a plurality of gear signals are set in the air conditioner; when the anti-cold function of the inner draught fan is closed, comparison and judgment between the temperature Ta of the inner disk and a preset temperature are carried outaccording to the received gear signal A; and then the rotate speed of the inner draught fan is controlled based on the judgment results; and different gear signals A correspond to different contrast judgments and judgment results. The device for improving the air conditioner heating comfort comprises an inner disk temperature sensing package and a controller, and the air conditioner comprises thedevice for improving the air conditioner heating comfort. According to the control method and the device for improving air conditioner heating comfort and the air conditioner, the rotate speed of theinner draught fan can be judged independently and controlled, the thermal comfort of a user is improved, and the heating comfort of the air conditioner is improved.

The invention discloses an UHPC industrial production stirring process. The UHPC industrial production stirring process comprises the following steps that firstly, the components are mounted and debugged, raw materials are fed into a site, quality detection is carried out on the raw materials, and the raw materials are fed into storage bin stations after the raw materials are detected to be qualified; before stirring operation, temperature control is carried out on the storage bin stations of the raw materials; the raw materials are weighed and proportioned correspondingly, and then a stirring device is started; the raw materials are sequentially conveyed, dumped and discharged into the stirring device, the stirring state is observed, and the next disc of raw materials is weighed while stirring; and when the stirring state meets the requirement, discharging is carried out, and meanwhile, the next disc of the raw materials is put into the stirring device. According to the UHPC industrial production stirring process, the whole process is high in working continuity and high in automation degree; and continuous stirring can be carried out during production, so that continuous feeding is guaranteed, and the engineering project requirements that the single-time pouring volume is large and the pouring time is long can be met.

The invention discloses an automobile air conditioning distribution box with a low-flow-resistance air guide piece. The automobile air conditioning distribution box comprises a box body, a heating unit and a cooling unit, wherein a defrosting ventilation orifice, a face blowing ventilation orifice and a foot blowing ventilation orifice are formed on the box body; a temperature-mixing air door is arranged in the box body; the low-flow-resistance air guide piece is arranged on one side of the temperature-mixing air door; an air guide channel is formed in the low-flow-resistance air guide piece and is provided with an air guide inlet facing to the heating unit, a first air guide outlet facing to the defrosting ventilation orifice, and a second air guide outlet facing to the surface blowing ventilation orifice; and the low-flow-resistance air guide piece has low-flow-resistance appearance the windward side of which faces to the cooling unit. As the automobile air conditioning distribution box adopts the structure design, cool air and hot air can be mixed better in the automobile air conditioning distribution box, and the temperature difference of the orifices is reduced; and simultaneously, the air flow resistance in the whole automobile air conditioning distribution box does not increase obviously, so that the comfortableness of an automobile air conditioner is improved remarkably.

The invention discloses an air conditioner, as well as a control method and device thereof. The air conditioner comprises a compressor, a first fan, a second fan, an air guiding mechanism and an air ejection mechanism, wherein the air ejection mechanism can be arranged on the top part of an indoor unit of the air conditioner in an up-and-down movement way; and the air guiding mechanism comprises ahorizontal air guiding bar and a perpendicular air guiding bar. The control method comprises the steps of under a refrigeration mode, receiving a starting command and a wind-grade signal of a bathingwind mode; and according to the wind-grade signal, controlling the first fan, the second fan, the air ejection mechanism, the horizontal air guiding bar, the perpendicular air guiding bar and the compressor. According to the control method provided by the embodiment of the invention, the fans, the air ejection mechanism, the horizontal air guiding bar, the perpendicular air guiding bar and the compressor can be controlled according to the wind-grade signal, so that not only is a comfortable and natural bathing type wind field state created, but also a user can flexibly select a wind grade according to the position where the user is located, and different refrigeration demands of the user can be met.

The invention discloses a high-chamber annular ventilation vertical preheater. The preheater is reasonable in structure and neat in layout, a ventilation system is uniform in exhaust, energy sources can be fully utilized, and the productivity of the preheater can be improved. The preheater comprises a shell and an upper preheater cover plate, wherein a discharging sliding bucket is arranged at a lower outlet of the shell. The preheater is characterized in that a plurality of annularly distributed preheating chamber cavities are formed in the inner periphery of the shell; the preheating chamber cavities are 3000 to 4500mm high; hydraulic pushing systems are symmetrically arranged at positions corresponding to the discharging sliding bucket on the shell; discharging pipes communicated with the preheating chamber cavities are arranged on the upper preheater cover plate; preheater support upright posts are uniformly distributed around the shell; a hoisting brick frame is arranged on the inner middle part of the shell; refractory hoisting bricks are arranged on the lower surface of the hoisting brick frame; a ventilation duct bracket is arranged on the preheater support upright posts; an annular ventilation duct is arranged on the ventilation duct bracket; the preheating chamber cavities are communicated with the annular ventilation duct through ventilation duct joints and preheating chamber air outlet pipes connected with the ventilation duct joints; air outlet pipe adjusting valves are arranged on the preheating chamber air outlet pipes.

The invention relates to a bidirectional flow ventilation and air exchange device with an energy recovery function, in particular to a fresh air ventilator with an energy recovery function. A motor of a fresh air machine and a motor of an exhaust fan are both arranged in a fresh air flow channel or an exhaust flow channel. For an energy recovery device which is applied to buildings in severe cold and cold regions and mainly used for recovery of heat in exhausted air in the heating season, the motor of the fresh air machine and the motor of the exhaust fan are both arranged in the fresh air flow channel, so that heat of the motor of the fresh air machine and heat of the motor of the exhaust fan are both fed in a room along with fresh air, the air output temperature of the fresh air can be improved, and then the energy recovery efficiency of the device under the heating work condition is improved. For the energy recovery device which is applied to buildings in hot summer and warm winter zones and mainly used for recovery of cold in exhausted air in the refrigerating season, the motor of the fresh air machine and the motor of the exhaust fan can be both arranged in the exhaust flow channel, so that heat of the motor of the fresh air machine and heat of the motor of the exhaust fan are both exhausted out of the room along with the exhausted air, the air output temperature of the fresh air can be lowered, and then the energy recovery efficiency of the device under the refrigerating work condition is improved.

The invention discloses a constant-temperature fresh-keeping base station run on the basis of natural energy. The constant-temperature fresh-keeping base station comprises a base station box body, an energy system, an air-conditioning fresh-keeping system and a control system; the energy system comprises a ground source heat pump system and a photovoltaic power generation system; the photovoltaic power generation system is used for supplying power to the base station box body, the ground source heat pump system and the control system; the ground source heat pump system is used for adjusting the temperature atmosphere for a fresh-keeping chamber of the base station box body; the air-conditioning fresh-keeping system is used for adjusting the gas atmosphere for the fresh-keeping chamber of the base station box body; and the control system is used for collecting and adjusting the running parameters of the base station and realizing the normal running of the base station. The base station combines the photovoltaic power generation system with the ground source heat pump system, power and cold or heat are provided for the running of the base station by utilizing natural energy such as solar energy and shallow geothermal energy, the utilization of conventional energy sources is reduced, and a relatively constant temperature and gas atmosphere condition can be maintained in the fresh-keeping chamber.

The invention discloses a photovoltaic coil-dew point indirect and direct evaporative cooling compound water chilling unit. The water chilling unit comprises a unit shell. An air inlet b is formed in one side face of the unit shell. An inner cooling type coil indirect evaporative cooler, a cross flow coil-dew point indirect evaporative cooler and a packing tower type evaporative cooling water chilling device are sequentially arranged in the unit shell in the air flowing direction. An exhaust port a is formed in the corresponding position, above the inner cooling type coil indirect evaporative cooler, of the top wall of the unit shell; an exhaust port b is formed in the corresponding position, above the packing tower type evaporative cooling water chilling device, of the top wall of the unit shell; the water chilling unit further comprises a photovoltaic solar power supply system arranged on the top wall of the unit shell; and the photovoltaic solar power supply system is connected with the inner cooling type coil indirect evaporative cooler, the cross flow coil-dew point indirect evaporative cooler and the packing tower type evaporative cooling water chilling device. Through the photovoltaic coil-dew point indirect and direct evaporative cooling compound water chilling unit, photovoltaic drive can be achieved for assisting while the water outlet temperature of the evaporative cooling water chilling unit can be lowered.

The invention relates to an air centrifugal refrigeration machine which comprises a shell, a motor, fan blades and a propeller boss. The air centrifugal refrigeration machine is characterized in thatthe motor, the fan blades and the propeller boss are arranged in the shell; a rotor shaft of the motor is connected with the propeller boss; the fan blades are arranged on the propeller boss and are hollow bodies; the inner parts of the fan blades are divided into a plurality of runners through a plurality of dividing pieces; the runners are radially distributed on the fan blades; the dividing pieces are straight lines or curve lines; air inlets of the runners are located at the root parts of the back faces of the fan blades; air outlets of the runners are connected with air inlets of throttlepipes; the throttle pipes are located in the end heads of the fan blades; and air outlets of the throttle pipes are located on the front faces of the end heads of the fan blades. Due to the action ofa centrifugal force, air is centrifuged, throttled and diffused, so that the temperature is reduced, and the aim on refrigerating is achieved.

The invention discloses a dehumidifier control method, a dehumidifier control device, a storage medium and a dehumidifier. The method comprises the following steps that: the air outgoing temperatureof the dehumidifier under the condition that the compressor of the dehumidifier operates is obtained; whether the air outgoing temperature of the dehumidifier is larger than or equal to a set temperature threshold value or not is determined; and if the air outgoing temperature of the dehumidifier is larger than or equal to a set temperature threshold value, the condenser of the dehumidifier is subjected to cooling and / or pressure reduction treatment, so that the air outgoing temperature of the dehumidifier can be reduced. According to the prior art, the air outgoing temperature of a dehumidifier is too high, and as a result, the comfort experience of a user is easily reduced when the dehumidifier is used in a humid season, however, with the dehumidifier control method, the dehumidifier control device, the storage medium and the dehumidifier of the invention adopted, the comfort experience of the user is achieved.

The invention discloses a compressor of a direct heat pump system and a PTC control method in the technical field of electric automobile heat pump air conditioners. The compressor comprises an air blower, an evaporation core body, a heat pump core body, a PTC heater, an evaporator temperature sensor, a main driving side temperature sensor, a co-driving side temperature sensor, an air conditioner unit and a heat pump system compressor. The air blower, the evaporation core body, the heat pump core body and the PTC heater are sequentially arranged in the air conditioner box in the airflow direction. The evaporator temperature sensor is arranged in the air conditioner box and located between the evaporation core body and the heat pump core body. The target rotating speed of the heat pump system compressor is controlled through the target air outlet temperature calculated through a comfort degree algorithm and the feedback temperature of the main driving side temperature sensor and the co-driving side temperature sensor; the PTC heater is divided into a left area and a right area to be independently controlled, and the target air outlet temperature of the PTC heater is 1.5 DEG C lower than the target air outlet temperature calculated through a comfort degree algorithm. Due to the fact that the PTC response is fast, the air outlet temperature of the system is made to be close to the target air outlet temperature fast, and the comfort requirement is met.