1351results about "Electric heating system" patented technology

The invention discloses a multi-energy cooperative control method and system with a self-adaptive disturbance discrimination function, and relates to the technical field of energy cooperative control, and the method comprises the following steps: constructing a multi-band phase fingerprint sequence based on the instantaneous voltage response of a photovoltaic array, and forming an initial energy transition baseline through extracting microsecond phase deviation tracks in different bands; and based on the initial energy transition baseline, constructing time series dynamic gradient mapping, converting the phase deviation trajectory into continuous power gradient distribution, and identifying a potential acceleration fragment in the power gradient distribution. According to the method, a high-sensitivity energy identification mechanism is constructed, pre-judgment is carried out in advance before photovoltaic output sharply rises, and power of different frequency bands is guided to enter a layered energy storage path based on a high-risk window, so that energy deposition according to needs is realized, local thermal stress concentration is avoided, and structural damage and energy storage attenuation of a heat storage body are effectively prevented; the stability and safety of electric heating are improved, and the service life of heat storage materials is prolonged.

The utility model provides a multifunctional surrounding furnace. The multifunctional surrounding furnace comprises a supporting base, a heating furnace body and a heating assembly. A plurality of supporting legs distributed at intervals in the circumferential direction are fixed to the lower end of the supporting base, the heating furnace body is fixed to the middle of the upper end of the supporting base, the heating assembly is fixed to the middle of the lower end of the supporting base, and the heat radiation surface of the heating assembly faces downwards. Through the arrangement of the heating furnace body and the heating assembly, the heating furnace body can heat tea water and food, and the heating assembly can heat a user, so that the surrounding furnace has the advantage of multiple functions, and the experience feeling of the user during use can be improved.

The invention relates to an intelligent energy storage electric heating system for heating by using a constant-temperature water mixing technology, belongs to the field of energy storage electric heating, and aims to solve the technical problems that the water outlet temperature fluctuation of the conventional constant-temperature water mixing circulation is large, and the water mixing proportion needs to be continuously and manually adjusted in use. A part of low-temperature return water after heat supply of the radiator is circulated back to the heat storage water tank through the return water diversion tee joint, and the low-temperature return water is uniformly distributed to the lower layer of the heat storage water tank through the lower water distributor installed in the inner opening of the water return pipe connector. The opening degree of the three-way water mixing valve is adjusted in real time according to a temperature signal from the water supply temperature measuring ball valve or a temperature sensing element in the three-way water mixing valve, and the temperature of mixed water is stabilized at the temperature needed by a room to be heated.

The present invention discloses a dry-process floor heating insulation board, comprising a heat-conducting and heat-insulating component; the heat-conducting and heat-insulating component is composed of a graphene heat-conducting board and a polystyrene resin insulation board. The heat of the aluminum alloy plate can be conducted upward through the graphene heat-conducting board and conducted to the polystyrene resin insulation board, and the polystyrene resin insulation board then conducts the heat upward through the graphene heat-conducting coating on its surface, thereby improving the thermal conductivity and the thermal conductivity efficiency. The present invention also discloses a floor heating system, comprising a paved insulation board and a heating pipe; the water inlet end of the pipe and the water outlet end of the pipe are connected to a heating mechanism through a heating pipe. The heating mechanism can form a closed water circulation loop after being connected to the heating pipe through the heating pipe, and the dry-process floor heating insulation board connected to the floor heating system can be heated by the circulation of hot water. The present invention also discloses a control method for the floor heating system, comprising S1-S3. Through the above steps, it is possible to facilitate the convenient control of the floor heating system.

The utility model provides a shell assembly and a ceiling electric appliance with the same, and relates to the technical field of volutes. The shell assembly comprises a shell, the shell is provided with an air duct side plate used for forming an air duct, the shell is provided with an air outlet communicating with the air duct, and the air duct side plate is provided with an opening; the spliced volute is movably connected with the shell, so that the spliced volute is provided with a blocking position where the side, away from the air outlet, of the spliced volute moves to the opening so as to block the opening, and the spliced volute is provided with an avoiding position where the side, close to the air outlet, of the spliced volute moves to the side of the opening; when the spliced volute is located at the blocking position, at least part of the spliced volute protrudes out of the outer side of the opening, and the problem that in the prior art, due to the fact that the size of the volute is limited, the air volume in the volute is small is solved.

The invention provides an electrical oil heater and heating equipment. The electrical oil heater comprises a plurality of heat dissipation assemblies and a plurality of rotating assemblies, and the heat dissipation assemblies are arranged at intervals; each rotating assembly is located between the two adjacent heat dissipation assemblies, the two sides of each rotating assembly are rotationally connected with the two heat dissipation assemblies correspondingly, and the inner space of each rotating assembly communicates with the inner spaces of the two adjacent heat dissipation assemblies. According to the electrical oil heater, the rotating assembly is rotationally connected between every two adjacent heat dissipation assemblies, so that each heat dissipation assembly can rotate freely, the electrical oil heater has the rotating function, and a user can rotate the heat dissipation assemblies according to the actual use scene; according to the electrical oil heater, each heat dissipation assembly is rotated so that each heat dissipation assembly can be rotated to the designated position, and then the form of the electrical oil heater can be freely adjusted, so that the applicability of the electrical oil heater is improved, and the electrical oil heater can be suitable for various use environments.

The present invention comprises: a plate (1), with two meandering grooves (6) that house two carbon fibre heating wires (8), to emit infrared radiation; and a coating (11) fixed to the plate (1) over the grooves (6), to distribute heat from the heating wires (8). The grooves (6) extend longitudinally from a first end (2), without reaching a second opposite end (3), to be able to cut the panel to the desired length, as well as extending transversely in each of the two halves of the plate (1), leaving a free central portion, to be able to cut the panel longitudinally in half.

The off-peak electricity heat storage cold and hot steam combined supply system comprises an electric boiler and a water supplementing device, the steam output end of the electric boiler is connected with a first heat storage tank, a second heat storage tank and a steam output pipe, and a first valve is installed between the steam inlet end of the first heat storage tank and the steam output end of the electric boiler; a second valve is installed between the steam inlet end of the second heat storage tank and the steam output end of the electric boiler. The system has the beneficial effects that through cooperation of the electric boiler, the first heat storage tank, the second heat storage tank, the steam output pipe and the hot water output pipe, steam can be generated through the electric boiler in the valley electricity period, and the steam is released in the peak electricity period to meet the production requirement; and the first heat storage tank and the second heat storage tank alternately store heat and release steam and hot water, and sustainable production is met, so that the electric energy cost of a factory is effectively reduced, the peak-valley difference of a power grid can be balanced, and the energy utilization rate is increased.

The embodiment of the invention provides air conditioning equipment, a warm air blower and a control method, and the air conditioning equipment comprises a shell cover, an air inlet and an air outlet, the heating device is arranged on the inner side of the shell cover; the wind scooper is arranged corresponding to the heating device, and the heating device is used for heating the wind scooper; and at least part of the airflow adjusting assembly is arranged in the shell cover, the airflow adjusting assembly is used for discharging air towards the inner wall face of the air guide cover, and the air guide cover is used for guiding air. According to the technical scheme, strong airflow can be generated under the action of the airflow adjusting assembly, and the airflow is heated when passing through the heated wind scooper and finally exhausted from the front side of the air conditioning equipment, so that the effect of large-air-volume warm air output is achieved.

The utility model provides a shell assembly and a ceiling electric appliance with the same, and relates to the technical field of electric appliances. The shell assembly comprises a main machine shell, an air inlet and an air outlet, the splicing shell assembly is detachably connected with the host shell, the splicing shell assembly is provided with a connection position when the splicing shell assembly is connected with the host shell, and the splicing shell assembly is provided with a separation position when the splicing shell assembly is separated from the host shell; when the splicing shell assemblies are located at the connecting positions, at least part of the splicing shell assemblies and part of the side wall of the main machine shell define part of the side wall of the air duct. According to the technical scheme, the spliced shell assembly and the main machine shell can define the air channel together, the volume of the air channel can be enlarged through the spliced shell assembly while the size of the main machine shell is not increased, the air outlet volume and the performance of the shell assembly can be improved, and the requirement of a user for large air volume is met.

The invention belongs to the technical field of building energy management and energy storage, and provides a building load transfer system and method based on graded phase change heat storage, in an energy storage stage, high-temperature hot water prepared by an electric heating device enters a graded phase change energy storage subsystem through a pipeline; in the heat supply stage, building return water is heated by the high-temperature energy storage unit and the low-temperature energy storage unit and then fed into the heat supply tail end; in the refrigeration stage, hot water output by the high-temperature energy storage unit drives the ammonia water absorption refrigerator to generate chilled water, then cooling is conducted through the heat supply tail end, and the high-temperature energy storage unit and the low-temperature energy storage unit are innovatively arranged in series; during energy storage, hot water sequentially releases heat according to the temperature from high to low, and return water sequentially absorbs heat according to the temperature from low to high during energy release and heat supply, so that temperature alignment and gradient utilization of heat energy are realized, loss in the heat transfer process is greatly reduced, and the overall energy utilization efficiency is remarkably higher than that of a traditional single-stage heat storage system; and the application of the phase change energy storage technology in building energy storage and energy utilization is promoted.

The invention belongs to the technical field of energy collaborative regulation and control, and particularly relates to a ground source heat pump and wind energy heat storage and power grid peak regulation system in a severe cold area. Based on wind speed and temperature two-parameter fluctuation characteristics, a rolling time window sequence is generated through dynamic division of time periods, the limitation of static division under meteorological sudden change in a severe cold area is overcome, dependence of historical heat supply data is abandoned by collecting wind speed data and buried pipe soil temperature gradient data at the moment when a rolling time window is triggered, and heat supply efficiency is improved. Dynamic accurate prediction of wind heat transfer power and ground source heat pump heating power is achieved, a heat supply priority rule is made according to power grid peak and valley characteristics on the basis, and the heat supply proportion of the ground source heat pump and a wind energy heat storage device is dynamically distributed within the upper limit of the heating power in combination with the heat load requirement. Meanwhile, actual heat supply performance is monitored, prediction correction requirements are judged, correction factors are generated and fed back to the next rolling window, dynamic correction of prediction errors is ensured, and the long-term operation precision and stability of the system are improved.

The embodiment of the invention provides a bath heater equipment partition heating method and device, electronic equipment and a storage medium, and the method comprises the steps that after the bath heater equipment is powered on, position information of a user in a bathroom is obtained, and the bath heater equipment comprises a plurality of heating modules which are independently controlled; starting one or more heating modules of the bath heater equipment for heating according to the position information; and when it is detected that the position of the user is updated, a heating module of the bath heater equipment is adjusted. According to the embodiment of the invention, the corresponding heating module is dynamically started to heat the bathroom according to the actual position of the user, the heating area is dynamically adjusted, and accurate heat distribution and efficient energy utilization are realized.

The invention relates to the technical field of household appliances, and discloses a warmer which comprises a shell, a first air outlet is formed in the top of the shell, and a second air outlet is formed in the bottom of the side face of the shell; the wind wheel assembly comprises a wind wheel, a volute tongue and a volute, the volute tongue and the volute are arranged on the peripheral side of the wind wheel in the circumferential direction of the wind wheel at intervals, and a wind wheel air inlet and a wind wheel air outlet are formed in the intervals of the two sides of the volute tongue and the volute correspondingly. And the splitter plate is arranged at the air outlet of the wind wheel and is used for splitting the air flow led out from the air outlet of the wind wheel into two air flows which are respectively communicated with the first air outlet and the second air outlet. By arranging the splitter plate, the effect that air is discharged from the upper face and the side face at the same time is achieved under the condition that the air volume is almost lossless, hot airflow discharged from the side face heats the bottom through axial air supply and slowly and upwards conveys heat through natural convection, the hot airflow discharged from the upper face can enhance the upward heat transfer rate, and therefore the total heat is increased; the heat dissipation range of the warmer is enlarged, and the requirement for warming the feet and the body of a user at the same time can be met.

The invention relates to the technical field of intelligent control, and discloses a flame-imitating effect adjusting method and device, heating equipment and a medium, the flame-imitating effect adjusting method and device are applied to the heating equipment, the heating equipment comprises a heating module, a humidifying module and a light source module, and the light source module is used for irradiating water mist output by the humidifying module to present the flame-imitating effect; the method comprises the steps that the current environment temperature and the current water temperature of the humidifying module are collected in real time; adjusting the heating power based on the current environment temperature to obtain the current heating power; the current atomization humidification power of the humidification module is adjusted based on the current heating power and the current water temperature; and the working state of the light source module is adjusted based on the current heating power and the current atomization humidification power so as to adjust the flame imitation effect. By means of the flame-imitating effect, different current environment temperatures can be self-adapted, meanwhile, the current heating power of the heating equipment can be represented, a user can visually feel the heating intensity of the heating equipment only through the flame-imitating effect, and the interactive experience of the user can be improved.

The invention belongs to the technical field of indoor heat supply, and relates to an indoor far infrared heat supply device which comprises a control system, a photovoltaic power generation device and a heat supply terminal, the photovoltaic power generation device and the heat supply terminal are electrically connected with the control system, and the photovoltaic power generation device is electrically connected with the heat supply terminal; the heating terminal comprises a far infrared floor heating system and an auxiliary heating device, the far infrared heating system is installed below a floor, and the auxiliary heating device is installed on the upper portion of the floor and can move; the far infrared floor heating system sequentially comprises a heating layer, a heat insulation layer and a reflecting layer from top to bottom, the heating layer is used for generating far infrared rays and heating the interior of a room through radiation, the heat insulation layer is used for preventing heat generated by the heating layer from losing downwards, and the reflecting layer is used for reflecting the heat lost downwards back to the interior of the room. The mode of photovoltaic power generation and far infrared heat supply is adopted for indoor heat supply, the remarkable energy-saving and emission-reducing effects are achieved, and meanwhile the comfort degree of indoor heat supply is improved.

This invention relates to the field of heating equipment technology, and discloses an anti-scalding electric heater, a control method, and a device. The anti-scalding electric heater of this invention can accurately and promptly detect human proximity signals and take timely preventative measures to prevent scalding accidents. Furthermore, it will not cause false triggering, will not cause repeated on / off switching of the heater, and will not affect the normal use of the heater. The anti-scalding electric heater of this invention includes: a main body, a radar detection device, and a control unit. The main body has an air outlet, and a heating element is disposed within the main body. The radar detection device is disposed on the main body and is used to detect human signals; the detection range of the radar detection device covers the air outlet. The control unit is disposed on the main body, and the signal output terminal of the radar detection device is electrically connected to the signal input terminal of the control unit. The signal output terminal of the control unit is electrically connected to the heating element and controls the on / off switching of the heating element.

The utility model discloses a four-lamp and double-air-heating warmer which comprises a cover plate, a box body, a heat dissipation piece, a heating air outlet device and a plurality of warming lamps. The heat dissipation piece, the heating air outlet device and the multiple heating lamps are all arranged in the box body. The heat dissipation piece is fixedly connected to the bottom of the middle of the box body and fixedly connected with the heating air outlet device. A gap exists between the heat dissipation piece and the heating air outlet device and is used for conducting heat dissipation on the heating air outlet device. The cover plate is fixedly connected to the opening side of the box body; the multiple heating lamps are symmetrically distributed on the two sides of the heating assembly and penetrate out of the cover plate. The heat dissipation piece comprises a plurality of bottom rings with the inner diameters decreased progressively, a plurality of supporting rings with the inner diameters decreased progressively and a plurality of connecting plates. The supporting ring and the bottom ring are coaxial, the supporting ring is located in the bottom ring, and the supporting ring is fixedly connected with the heating air outlet device; the support ring is higher than the bottom ring; the connecting plate is radially and fixedly connected with the bottom ring and the supporting ring; the plurality of connecting plates are annularly distributed along the bottom ring; a heat dissipation area is formed in the supporting ring with the smallest inner diameter.

The utility model provides a double-heating-body warmer with a heat storage function, belongs to the technical field of warmers, and mainly aims at solving the problem that an existing warmer is poor in warming effect. Comprising a first shell, a second shell is installed on one side of the first shell, a heat storage ceramic heating plate is arranged on the side, close to the second shell, of the first shell, a first air inlet is formed in the position, corresponding to the heat storage ceramic heating plate, of the bottom of the first shell, and a second air inlet is further formed in the bottom of the first shell; a stainless steel string aluminum sheet heating body is arranged on one side of the first shell corresponding to the second air inlet, and an air outlet is formed in the top of the second shell; through the arrangement of the heat storage ceramic heating plate and the stainless steel string aluminum sheet heating body, the heating power of the warmer is improved, heat can be distributed more evenly, and the problem that a traditional warmer is poor in heating effect is solved; meanwhile, when one heating body breaks down, the other heating body can still work continuously, and the reliability of the warmer is improved.

The utility model provides a safety protection structure of a carbon fiber warmer, which belongs to the field of carbon fiber warmers and comprises a warmer body, protection components are arranged on two sides of the warmer body; the protection assembly comprises a protection frame and a plurality of protection rods, a plurality of positioning columns are fixedly arranged at the four corners of the two sides of the warmer body, positioning holes are formed in the four corners of the inner side of the protection frame, the multiple protection rods are fixedly arranged in the protection frame, and spring pieces are fixedly arranged on the warmer body. Clamping blocks are fixedly arranged on the inner sides of the spring pieces, and clamping holes are formed in the two sides of the protection frame. The protection assembly is arranged, the protection effect is achieved, safety is improved, meanwhile, the protection frame can be rapidly and conveniently mounted and dismounted, cleaning and maintenance are convenient, the drying assembly is further arranged, towels, clothes, shoes and other articles can be dried and aired conveniently, the space is not occupied after the drying assembly is folded, and practicability is improved.

The invention provides a photovoltaic power generation off-grid power supply and heat supply control method and system, and the method comprises the steps: collecting multi-dimensional parameters in the operation process of a photovoltaic power generation off-grid system, and the multi-dimensional parameters at least comprise a photovoltaic power generation parameter, an energy storage parameter, a load parameter and an environment parameter; processing the multi-dimensional parameters, analyzing the real-time correlation degree between any two types of parameters, constructing a parameter correlation matrix, and determining a core influence parameter set of the current system; respectively evaluating a power supply priority and a heat supply priority based on the core influence parameter set; determining a basic energy distribution proportion of power supply and heat supply by combining the total distributable energy of the system; and dynamically adjusting the energy distribution proportion of power supply and heat supply according to the deviation condition of the actual load demand and the basic energy distribution proportion. According to the method, the intelligent level and response speed of system energy distribution can be effectively improved, the adaptability of the system to variable operation conditions is enhanced, the energy utilization efficiency is improved, and stable operation of power supply and heat supply loads is ensured.

A warmer comprises a box body, a draught fan installation groove and a heating groove, a draught fan is arranged in the draught fan installation groove, and an air exchange opening is formed in the side wall of the draught fan installation groove; the box body is arranged above the fan mounting groove, and an air blowing opening corresponding to the fan is formed in the bottom surface of the box body; the heating groove is formed in the box body, intervals are formed between the heating groove and the side wall of the box body and between the heating groove and the bottom face of the box body, and a heating device is arranged in the heating groove; a panel covers the top of the box body, an air groove is downwards formed in the panel close to the edge, and an air opening is formed in the side wall of the air groove.

The utility model discloses a warmer which comprises a shell module, a warming module and a control module, the warming module and the control module are both installed on the shell module, the shell module comprises a main body and a front plate, and the front plate is installed on the front portion of the main body; a first fan mounting area, a second fan mounting area and a plurality of foot pads are arranged at the bottom of the main body, and the front plate is provided with an air outlet shutter and a control mounting area. According to the warmer, linkage is achieved through the shell module, the warming module and the control module, and the warmer is small in size, suitable for being placed at an office position, fast and concentrated in warm air output, capable of achieving fast warming and low in energy consumption.

The utility model discloses an NWS type direct current unit which comprises a cylinder body, an electric heating tube, a steel aluminum heat exchange tube, a first annular baffle, an upper annular plate and a lower annular plate, the cylinder body comprises an inner cylinder, an outer cylinder, an upper tube plate and a lower tube plate, a containing cavity is formed between the inner cylinder and the outer cylinder, the electric heating tube is arranged on the upper tube plate in a penetrating mode, and the power connection end of the electric heating tube is located outside the containing cavity. The two ends of the steel-aluminum heat exchange pipe penetrate through the upper pipe plate and the lower pipe plate respectively, the first annular baffle is arranged on the upper pipe plate, the power connection end of the electric heating pipe is wrapped in the first annular baffle, the upper annular plate is arranged on the first annular baffle and the outer cylinder, a water outlet pipeline is defined by the upper annular plate and the outer cylinder, and a water outlet is further formed in the outer cylinder. The lower annular plate is arranged at the bottom of the inner barrel and the bottom of the outer barrel, a water inlet pipeline is defined by the lower annular plate, the outer barrel is further provided with a water inlet, the water inlet is communicated with the port of the steel-aluminum heat exchange pipe, the NWS type direct current unit adopts the steel-aluminum heat exchange pipe to replace a stainless steel spiral coil pipe, and the NWS type direct current unit has better heat exchange efficiency.

The utility model provides a heat preservation structure and a one-way heating element, the heat preservation structure comprises a first panel, a second panel and a supporting layer, and the first panel and the second panel are arranged in parallel; the supporting layer is filled between the first panel and the second panel, and the supporting layer is fixedly connected with the first panel and the second panel; wherein at least one cavity is formed in the supporting layer. According to the heat preservation structure, heat transfer is effectively slowed down through the cavities, the heat preservation effect is achieved, the multiple cavities are formed in the supporting layer, the heat preservation performance is achieved, and meanwhile the supporting layer can be cut at will for various industrial machining.

The swing blade air guide device comprises an air opening plate and a swing blade plate, an air opening is formed in the middle of the air opening plate, and the left end and the right end of the swing blade plate are rotationally arranged in the air opening through swing blade supports respectively. The swinging blade plate is made of metal, one end of the swinging blade support is rotatably connected with the tuyere plate, the other end of the swinging blade support is connected with the swinging blade plate in a buckling mode, the swinging blade plate is made of metal and high in strength, even if the swinging blade plate is made into a thin and long structure, the swinging blade plate is not prone to distortion and deformation, not prone to deformation and aging when used in a high-temperature environment for a long time and more durable. The service life is longer, the flame-retardant effect is better, and the safety performance is improved; and the swing blade bracket is connected with the swing blade plate in a buckling manner, so that compared with the traditional screw fixing scheme, the mounting process is simplified, the use of screws is reduced, the production efficiency is improved, and the production cost is reduced.

The utility model discloses a ceiling type warmer which comprises a lamp shell, a heating device arranged in the lamp shell and a telescopic hanging rod connected with the lamp shell. The telescopic hanging rod comprises a first sleeve and a second sleeve which are suitable for being matched in a sleeved mode. Each of the first sleeve and the second sleeve is provided with a hollow cavity, and the cavity of the first sleeve is communicated with the cavity of the second sleeve; the second sleeve is suitable for being partially inserted into the first sleeve, and when the second sleeve is inserted into the first sleeve by different depths, the total lengths of the corresponding telescopic suspenders are also different; a reflecting cover is further arranged on the side end face, back to the telescopic suspender, of the lamp shell, and the heating device is arranged at the side end, back to the telescopic suspender, of the reflecting cover.

The utility model belongs to the field of floor heating, and particularly relates to a wet paving graphene floor heating system and a floor structure, the wet paving graphene floor heating system comprises a concrete layer, a waterproof layer, a graphene electric heating layer, an insulating layer, a heat preservation layer and a heat insulation layer which are sequentially paved from top to bottom, and aluminum foil is paved on the outer surface of the heat preservation layer. According to the wet laying graphene floor heating system, through the arrangement, the safety and the waterproof performance of the system are improved, and the heat loss is reduced.

This utility model discloses a heater with an upper heating function. The heater body includes support legs and a heating unit. The heating unit includes a control unit, a heating element, and an upper cover. A heating plate is disposed inside the heating element. The heating plate is located on the side near the upper cover. The heating plate and the upper cover are not in contact. A breathable mesh is provided outside the heating element. This utility model has a reasonable structural design. The control unit facilitates user operation. The heating element provides heat generation, and the heating plate allows the heater body to provide heat. The non-contact connection between the heating plate and the upper cover, along with the breathable mesh outside the heating element, improves heat dissipation when the heater is turned off, and the breathable mesh further enhances heat dissipation.

The utility model relates to a bath heater which comprises a panel provided with an air inlet and an air outlet located on at least one side of the air inlet. The lighting assembly is mounted on the panel in a manner of at least partially covering the air inlet, and is provided with a first opening position for exposing the air inlet and a first shielding position for shielding the air inlet; the lighting assembly is movably mounted on the front surface of the panel by virtue of the first driving assembly, so that the lighting assembly can be switched between a first opening position and a first shielding position under the driving of the first driving assembly; the sliding cover is mounted on the panel in a manner of at least partially covering the air outlet, and is provided with a second opening position for exposing the air outlet and a second shielding position for shielding the air outlet; and the sliding cover is movably mounted on the front surface of the panel by virtue of the second driving assembly, so that the sliding cover can be switched between a second opening position and a second shielding position under the driving of the second driving assembly.