55results about How to "Large temperature fluctuations" patented technology

The invention provides a compartment temperature control method of a refrigerator. The compartment temperature control method comprises the following steps of: receiving a first temperature signal detected by a temperature sensor in a compartment of the refrigerator, and judging whether the first temperature signal is in a first temperature interval; if the first temperature signal is in the first temperature interval, judging that the temperature sensor is in a normal state, and controlling a compressor to be started or stopped in a preset way according to the first temperature signal; and if judging that the first temperature signal is not in the first temperature interval, judging that the temperature sensor has a fault, and controlling the compressor to be started and stopped according to a preset stop / start time rate. According to the embodiment of the invention, when the temperature sensor has the fault, the compressor can be controlled to be started and stopped normally so as to prevent the compartment temperature fluctuation from being overlarge, and compartment function failure is avoided.

The invention discloses a catalytic cracking flue gas desulfurization and dust removal process. Catalytic cracking flue gas is subjected to three technical processes of flue gas dust removal and primary desulfurization, flue gas desulfurization and flue gas degassing and glue melting in sequence; the catalytic cracking flue gas is purified and washed by a power wave device; the flue gas is subjected to spraying and washing, and mechanical demisting in an absorption tower, so that wet-process desulfurization and dehumidification are realized; and finally, mist drops are captured by an electric demisting method through high-voltage discharging, so that the dust content in the flue gas is less than or equal to 30mg / Nm<3> and the flue gas emission standard is realized. According to the catalytic cracking flue gas desulfurization and dust removal process, a sodium-alkali-process desulfurization method is used for removing sulfur dioxide in the catalytic cracking flue gas of an oil refinery and high-concentration catalyst dust carried by the flue gas; the requirements that the fluctuation of the temperature and the dust content of the catalytic cracking flue gas of the oil refinery is great, and the operation of a desulfurization device is absolutely reliable are met; and meanwhile, an operation process of the gas desulfurization and dust removal device avoids secondary aerosol pollution and corrosion of conventional wet-process desulfurization flue gas, and the safety operation of a main oil refining device is guaranteed.

The invention belongs to the technical field of air conditioners, and particularly relates to an air conditioner defrosting control method. In order to prevent room temperature fluctuation from beingexcessively high during defrosting, the air conditioner defrosting control method comprises the following steps that in the heating operation process of an air conditioner, whether the air conditionermeets the defrosting condition or not is judged; if yes, the indoor ambient temperature and the outdoor ambient temperature are obtained before the air conditioner enters into a defrosting mode; andthe indoor ambient temperature and the outdoor ambient temperature are compared, and the operating frequency of a compressor, the open degree of a throttle valve and the fan rotational speed of an indoor unit and / or an outdoor unit are selectively controlled according to the comparison result. According to the air conditioner defrosting control method, on the basis of the difference value betweenthe indoor ambient temperature and the outdoor ambient temperature, the operating frequency of the compressor, the open degree of the throttle valve and the fan rotational speed of the indoor unit and / or the outdoor unit are selectively controlled to store a part of energy, and in the defrosting process of the air conditioner, the part of energy is replenished into a room, so that the excessively-high room temperature fluctuation is effectively prevented during defrosting.

The invention belongs to the technical field of air conditioners, and particularly relates to an air conditioner defrosting control method. In order to prevent room temperature from being too high influctuation during defrosting, the method comprises the following steps that in the heating operation process of an air conditioner, whether the air conditioner meets defrosting conditions is judged;in the heating operation process of the air conditioner, whether the air conditioner meets defrosting conditions is judged; if yes, before the air conditioner enters a defrosting mode, the temperaturet of an outdoor coil pipe is obtained, and the temperature t0 of the outdoor coil pipe is obtained again after a preset time; and t and t0 are compared, and the operation frequency of a compressor, throttle opening or the indoor unit and / outdoor unit fan rotating speed are selectively controlled according to the comparison result. Before the air conditioner enters the defrosting mode, some energyis stored, the energy is supplemented into a room in the air conditioner defrosting process, and therefore room temperature fluctuation is prevented from being too high during defrosting.

The invention provides a refrigerator, which comprises a door body, a refrigerator body, a circulating fan, temperature sensors, a refrigerating system and a controller, wherein chambers are defined in the interior of the refrigerator body; the chambers comprise a refrigerating chamber, a freezing chamber and a temperature-variable chamber; the circulating fan is arranged in the temperature-variable chamber, and runs when temperature differences of different areas in the temperature-variable chamber are bigger than a preset value or runs during the refrigerating process of the temperature-variable chamber; the temperature sensors are respectively arranged in the chambers so as to acquire the temperature of each chamber; the refrigerating system is used for refrigerating the chambers; the controller is used for controlling the refrigerating system to be started and stopped and the circulating fan to be started and stopped according to the acquired temperature. The refrigerator provided by the embodiment of the invention has the advantages that the temperature of the temperature-variable chamber can be accurately controlled, and the temperature fluctuation of the temperature-variable chamber is smaller, and therefore, the market competitiveness of the refrigerator is promoted. The invention also provides a control method of the refrigerator.

The invention provides a wall top cutting device for decoration regions for decoration based on water mist dust suppression, and belongs to the field of decoration and cutting protection. The problemthat the water amount is too high to be immersed in wall surfaces of walls are solved. The wall top cutting device comprises a motor, a protective cover, a blocking plate and a T-shaped water distribution pipe, wherein the blocking plate is integrally semicircular, and a rubber sealing ring is adhered to the periphery of the inner side end surface of the blocking plate; a handle frame is locked and supported at the bottom of the motor, and the blocking plate is arranged at the front end of the motor in a locking mode; a center rotating shaft of the motor penetrates through the protruding rotation of the blocking plate to be rotationally arranged in the protective cover, and a cutting blade is locked and clamped and mounted on the head end section of the center rotating shaft of the motor;two water outlet pipes at the front end of the T-shaped water distribution pipe are in locking butt joint with two spray pipes through two water guide hoses to be in communication with the two spray pipes, the two spray pipes can be compressed, two springs can slide along the rotary cutting depth of the cutting blade, so that two spray heads can slide flush with a cutting groove to align and accurately inject the cutting dust, and the dust fall effect is remarkable.

The invention provides a refrigerator. The refrigerator comprises storage rooms and an evaporator used for providing a cooling capacity for the storage rooms. The refrigerator further comprises a liquid storage device, a defrosting box, a liquid inlet pipeline, a heating device and a liquid returning pipeline. Defrosting liquid is contained in the liquid storage device. An inner cavity with an upward opening is defined by the defrosting box, and the evaporator is arranged in the inner cavity of the defrosting box. The liquid inlet pipeline is arranged to guide the defrosting liquid in the liquid storage device to the portion above the evaporator so as to spray the evaporator. The heating device is arranged on the liquid inlet pipeline and arranged to heat the defrosting liquid flowing through the liquid inlet pipeline. The liquid returning pipeline communicates with the inner cavity of the defrosting box and is arranged to convey the defrosting liquid in the defrosting box back to the liquid storage device. Compared with the prior art that a heating device is utilized for heating surrounding air to conduct baking type defrosting on an evaporator through hot air, the defrosting liquid and the evaporator can be subjected to sufficient heat exchange through the defrosting manner, a better heat exchange effect is achieved, accordingly, the defrosting efficiency is improved, and the energy consumption can be reduced.

The invention discloses an air conditioner and a self-cleaning control method thereof, and belongs to the technical field of air conditioners. The control method comprises the following steps: obtaining the current indoor temperature when the air conditioner operates a frosting stage of an indoor unit cleaning mode; adjusting the operating parameter of at least one part of the air conditioner based on the temperature difference between the current indoor temperature and the initial indoor temperature when the air conditioner starts the indoor unit cleaning mode; and after a defrosting switching condition is satisfied, controlling the air conditioner to enter a defrosting stage of the indoor unit cleaning mode, and controlling to start an indoor unit electric heating device. According to the self-cleaning control method for the air conditioner provided by the invention, the operating parameter of the air conditioner is adjusted according to the indoor temperature detected in the frosting stage of the self-cleaning mode so as to maintain the temperature difference between the indoor temperature and the initial indoor temperature when the air conditioner starts the indoor unit cleaning mode within a preset temperature difference range; therefore, the indoor environment cannot produce great temperature fluctuation in the frosting stage of self-cleaning of the air conditioner; and the user experience of a user when the air conditioner executes the self-cleaning mode can be effectively ensured.

The invention belongs to the technical field of air conditioners and particularly relates to a defrosting control method for an air conditioner. In order to prevent excessive room temperature fluctuation during defrosting, the method comprises the following steps that whether the air conditioner meets defrosting conditions or not is judged during heating operation of the air conditioner; if yes, the exhaust temperature t of a compressor is acquired before the air conditioner enters the defrosting mode, and the exhaust temperature t0 of the compressor is acquired again after a preset time interval; and t and t0 are compared, and the operating frequency of the compressor and the throttle valve opening or the fan rotation speed of an indoor unit and / or an outdoor unit are selectively controlled according to the comparison result. According to the defrosting control method for the air conditioner, before the air conditioner enters the defrosting mode, the operating frequency of the compressor and the throttle valve opening or the fan rotation speed of the indoor unit and / or the outdoor unit are selectively controlled according to the comparison result of t and t0 to store a part of energy, and in the defrosting process of the air conditioner, the part of energy is replenished indoors, so that excessive room temperature fluctuation during defrosting is effectively prevented.

The invention belongs to the technical field of air conditioners, in particular to a method for controlling defrosting of an air conditioner. In order to prevent over-large fluctuation of a room temperature during defrosting, the method for controlling the defrosting of the air conditioner disclosed by the invention comprises the following steps: judging whether the air conditioner meets a defrosting condition or not in a heating operation process of the air conditioner; acquiring an indoor ambient temperature and an outdoor ambient temperature before the air conditioner enters into a defrosting mode if the air conditioner meets the defrosting condition; and selectively controlling the operation frequency of a compressor, an opening degree of a throttling valve or rotation speed of an airblower of an indoor unit and / or an outdoor unit according to values of pn and dn, wherein pn is equal to the preset temperature minus the outdoor ambient temperature, and dn is equal to the indoor ambient temperature minus the outdoor ambient temperature. According to the method disclosed by the invention, before the air conditioner enters into the defrosting mode, based on the values of dn and pn, the operation frequency of the compressor, the opening degree of the throttling valve or the rotation speed of the air blower of the indoor unit and / or the outdoor unit are selectively controlled soas to store a part of energy; and in the defrosting process of the air conditioner, the part of energy is supplemented to the inside of a room again, so that the over-large fluctuation of the room temperature during defrosting can be effectively prevented.

The invention provides a heat pump system of an air-conditioner, the air-conditioner and a defrosting control method of the air-conditioner. The heat pump system comprises a compressor, an indoor heatexchanger, a first outdoor heat exchanger, a second outdoor heat exchanger, a first four-way valve and a second four-way valve, wherein the first outdoor heat exchanger and the second outdoor heat exchanger are connected in parallel; a first valve opening of the first four-way valve is connected with the indoor heat exchanger; a second valve opening of the first four-way valve is connected with an air suction opening of the compressor; a third valve opening of the first four-way valve is connected with a fourth valve opening of the second four-way valve; a fourth valve opening of the first four-way valve is connected with an exhausting opening of the compressor; a first valve opening of the second four-way valve is connected with the first outdoor heat exchanger; a second valve opening ofthe second four-way valve is connected with the indoor heat exchanger; and a third valve opening of the second four-way valve is connected with the second outdoor heat exchanger. By means of the heatpump system of the air-conditioner, the air-conditioner and the defrosting control method of the air-conditioner, air-conditioner heating is continuous in the defrosting period, thus the indoor temperature keeps steady, and the user experience is improved.

The invention provides a humidifier humidifying capacity testing device which is used for testing a humidifier to be tested and comprises an environment temperature adjusting box, a first heat exchange assembly and a second heat exchange assembly, and the first heat exchange assembly and the second heat exchange assembly are arranged in the environment temperature adjusting box. The first heat exchange assembly comprises a container, a first heat exchange pipe and a second heat exchange pipe. A first liquid heat exchange medium is accommodated in the container; at least part of the first heatexchange tube is arranged in the container, gas passes through the first heat exchange tube, the second heat exchange tube is used for passing through a first liquid heat exchange medium, the gas canexchange heat with the first liquid heat exchange medium through the first heat exchange tube, the first heat exchange tube is connected with a humidifier to be tested, and the gas can be input into the humidifier to be tested through the first heat exchange tube; the second heat exchange assembly is used for exchanging heat with the first liquid heat exchange medium in the second heat exchange pipe. According to the test device, it can be guaranteed that the flow of gas input into the humidifier to be measured is not limited, and it can be guaranteed that the temperature of the gas input intothe humidifier to be measured is accurately controlled.

The invention discloses an air conditioner and a control method for self-cleaning of the air conditioner, and belongs to the technical field of air conditioners. The control method includes the following steps that the current indoor temperature of the air conditioner in the frosting stage for running the indoor unit cleaning mode is acquired; on the basis of the temperature difference of the current indoor temperature and the initial indoor temperature when the air conditioner starts the indoor unit cleaning mode, running parameters of at least one component of the air conditioner are adjusted; the at least one component comprises an inner fan; and the running parameter of the inner fan includes the air supply duration determined according to the inner fan coil pipe temperature. With thecontrol method for self-cleaning of the air conditioner, according to the indoor temperature detected in the frosting stage of the self-cleaning mode, the running parameters of air conditioner components including the inner fan are adjusted, so that the temperature difference of the indoor temperature and the initial indoor temperature when the air conditioner starts the indoor unit cleaning modeis maintained in the set temperature difference range, the relatively large temperature fluctuation can be avoided in the indoor environment in the frosting stage of self-cleaning of the air conditioner, and the use experience of users when the air conditioner executes the self-cleaning mode can be effectively guaranteed.

The invention discloses steel for nuclear-power containment with thickness of 6 mm and a manufacturing method of the steel. The low-C and low-Mn composition series design for the steel, extra alloyingcomponents are not added, and an irradiation effect is taken into consideration while yield strength stability is guaranteed. According to the manufacturing method, by means of optimization of blanktype, length of a rolled piece is effectively controlled in a rolling process, and larger temperature fluctuation caused by the too long rolled piece is avoided. With the adoption of superhigh-temperature heating mechanism, higher temperature for blanks is obtained during rolling, and higher final rolling temperature for a steel plate is guaranteed after the rolling is finished. By means of control for the rolling process, temperature drop in the process is reduced, and smaller temperature difference fluctuation of the head and the tail of the rolled piece is guaranteed. The length of the rolled piece is optimized and an area with poorer plate cut is cut off, and performance uniformity of a sampling position is ensured. The 6mm nuclear-power steel produced with the method has the advantages that yield strength is controlled stably, the toughness matching is excellent, and requirements for performance are met completely. The performance qualification rate of production reaches 94%, andthe steel is completely applicable to industrial mass production.

The invention discloses a method for strengthening biological phosphorus removal of municipal sewage A / O process through internal reflux of sludge, belongs to the field of advanced sewage treatment, and solves the problem that the phosphorus removal performance of a biological phosphorus removal system becomes poor easily due to conversion of phosphorus accumulation metabolism into glycan metabolism. The method comprises steps: firstly, adjusting the DO concentration ranges of an anaerobic section and an aerobic section to be 0-0.1 mg / L and 2-4 mg / L respectively, the SRT of a system to be 10-12 d, the HRT of the anaerobic section and the HRT of the aerobic section to be 2 h and 5 h respectively, and the MLSS range of the anaerobic section to be 2500-3500 mg / L; secondly, increasing internal reflux of sludge in the anaerobic section, namely refluxing 20% of sludge at the end of the anaerobic section to the beginning of the anaerobic section so as to improve the phosphorus load of the sludge in the aerobic section, and inducing glycan metabolism to be converted into polyphosphate metabolism by promoting excessive phosphorus absorption of the sludge in the aerobic section so as to strengthen the phosphorus removal performance of the system; and meanwhile, controlling SRT to be 10-12 d, and discharging phosphorus from the system in the form of phosphorus-rich sludge; returning the undischarged sludge to the initial stage of the anaerobic section, namely controlling the external reflux ratio of the sludge, stopping internal reflux of the sludge in the anaerobic section after the TP removal rate of the system is greater than 95% and maintaining for two weeks, and considering that the TP removal performance of the system is enhanced.

The invention discloses a wine cabinet and a control method and device thereof. The wine cabinet comprises a first compartment and a second compartment, wherein the first compartment and the second compartment are separated from each other. The control method comprises the steps that the set temperature of the first compartment is acquired, and the set temperature of the second compartment is acquired; when one of the set temperature of the first compartment and the set temperature of the second compartment changes, whether the difference between the set temperature of the first compartment and the set temperature of the second compartment is less than or equal to a preset temperature threshold is determined; and if the difference is greater than the preset temperature threshold, the unchanged set temperature is controlled to synchronously change with the changed set temperature, and the difference is less than or equal to the preset temperature threshold. According to the control method provided by the embodiment of the invention, large temperature fluctuations caused by more temperature transfer generated by large set temperature difference between the first compartment and the second compartment can be effectively prevented, and condensation of a glass separator can be effectively prevented.

The invention discloses a control method for an air conditioning system and belongs to the technical field of air conditioning control. The air conditioning system comprises an electric heating devicearranged in an indoor unit. The control method comprises the following steps of acquiring a mode switching control command comprising a mode type in a self-cleaning mode; analyzing the mode switchingcontrol command to acquire the mode type; and when the mode type is a refrigerating mode, reducing the rotating speed of an indoor fan and / or controlling the electric heating device to be started. According to the embodiment of the invention, discomfort to human body and large temperature fluctuation as the indoor unit blows strong cold air are avoided when the air conditioning system exits the self-cleaning mode, so that the user experience is improved. The invention discloses a control device for the air conditioning system, the air conditioning system, computer equipment and a storage medium.

The invention provides a sulfuryl fluoride reaction device which comprises a reaction chamber and a heat exchange chamber, and the reaction chamber and the heat exchange chamber are arranged at an interval; a gas inlet of the heat exchange chamber is connected with a gas outlet of one reaction chamber, and a gas outlet of the heat exchange chamber is connected with a gas inlet of the other reaction chamber; a filler layer is arranged in the reaction chamber and is detachably connected with the inner wall of the reaction chamber; a vertical heat exchange pipe is arranged in the heat exchange chamber, the top end of the heat exchange pipe is connected with an air inlet pipe, and the bottom end of the heat exchange pipe is connected with an air outlet pipe; filter plates are installed between the vertical heat exchange pipes and detachably connected with the outer walls of the vertical heat exchange pipes. When the device is used for synthesizing sulfuryl chloride, the influence on the activity of the filler layer due to over-high temperature of process gas can be effectively avoided, and the yield of sulfuryl fluoride is ensured; the device can effectively reduce particle impurities in process gas, prevents the particle impurities from entering the next reaction chamber to influence the composition and structure of the filler, ensures consistent quality of sulfuryl fluoride produced by using the synthesis device, and ensures the product quality.

The invention relates to an adjustable and energy-saving constant temperature and humidity unit, comprising a frequency converting type compressor, an evaporator, an expansion valve, a steam adjustable humidifier, a single pipe adjustable heater, a condenser and a centrifugal fan, wherein, the frequency converting type compressor is connected with the condenser; the condenser is connected with the thermal expansion valve; the thermal expansion valve is connected with the evaporator; the evaporator is connected with the frequency converting type compressor; and the single pipe adjustable heater, the steam adjustable humidifier and the centrifugal fan are connected with the evaporator. The technical effect of the invention is that: after adopting the frequency converting type compressor, the power of the compressor can be adjusted by frequency converting, leading to protect the compressor and save large amount of energy. After the single pipe adjustable heater is adopted, the energy consumption arising from excess heat quantities and big temperature fluctuation are avoided. The steam adjustable humidifier utilized can avoid the energy consumption and big ambient humidity fluctuation.

The invention belongs to the technical field of air conditioners, and particularly relates to a defrosting control method of an air conditioner. In order to prevent the room temperature from fluctuating excessively during defrosting, the defrosting control method of the air conditioner comprises the following steps that whether the air conditioner meets defrosting conditions during the heating operation of the air conditioner or not is judged; if so, the indoor ambient temperature is obtained before the air conditioner enters a defrosting mode; and the indoor ambient temperature and the presettemperature are compared, and the operating frequency of the compressor, an opening degree of the throttle valve or the fan rotation speed of an indoor unit and / or an outdoor unit are selectively controlled according to the comparison result. According to the defrosting control method of the air conditioner, the operating frequency of the compressor, the opening degree of the throttle valve or the fan rotation speed of the indoor unit and / or the outdoor unit are selectively controlled based on the difference between the preset temperature and the indoor ambient temperature to store a part ofthe energy, the part of the energy is replenished to the indoor unit during defrosting of the air conditioner, and the room temperature is effectively prevented from fluctuating excessively during defrosting.

The invention discloses a sludge drying and incinerating device and a sludge incinerating method thereof. The sludge drying and incinerating device comprises an incinerator body, a vertical smoke exhaust channel is formed in the top of the incinerator body, a heat recovery device is arranged in the incinerator body in a penetrating mode, a feeding hopper is connected to the smoke exhaust channel through a feeding channel, a first spiral conveyor is arranged in the feeding channel, a spiral sludge drying sliding way is arranged at the top in the incinerator body and matched with the side wall of the incinerator body in a sealed mode, a penetrating and through sludge falling channel is formed in the spiral sludge drying sliding way, and a temperature control cover plate is arranged at the top of the sludge falling channel; the temperature control cover plate is controlled by a temperature control push rod to cover or open the sludge falling channel, so that the temperature in the incinerator body is maintained at a set temperature, the situation that the temperature fluctuation of a hearth is too large due to different sludge components is avoided, the heat recovery device can stably absorb heat, and energy conservation and emission reduction are facilitated.

The invention discloses an electric cabinet cooling structure of a heat pump drying unit. The heat pump drying unit comprises an evaporator. The evaporator is used for cooling and dehumidification onthe return air of the unit, so that the area, on the downstream part of the evaporator, in the circulation direction of air flow is the dry and low-temperature area. The electric cabinet cooling structure comprises a first air channel. The first end of the first air channel communicates with the dry and low-temperature area. The second end of the first air channel communicates with the interior ofan electric cabinet. According to the electric cabinet cooling structure, the dry and cold air in the dry and low-temperature area can be conveniently introduced into the electric cabinet so that cooling on the electric cabinet can be realized, and the operational failure, caused by too high temperature in an electric cabinet, of components can be avoided while it is not needed to arrange the electric cabinet in the dry and low-temperature area. The invention further discloses the heat pump drying unit.

The invention discloses an air conditioner and a control method for self-cleaning of the air conditioner, and belongs to the technical field of air conditioners. The control method includes the following steps that the current indoor temperature of the air conditioner in the frosting stage for running the indoor unit cleaning mode is acquired; on the basis of the temperature difference of the current indoor temperature and the target indoor temperature when the air conditioner starts the indoor unit cleaning mode, running parameters of at least one component of the air conditioner are adjusted; the at least one component comprises an inner fan; and the running parameter of the inner fan includes the air supply duration determined according to the inner fan coil pipe temperature. With the control method for self-cleaning of the air conditioner, according to the indoor temperature detected in the frosting stage of the self-cleaning mode, the running parameters of the air conditioner areadjusted, so that the temperature difference of the indoor temperature and the target indoor temperature when the air conditioner starts the indoor unit cleaning mode is maintained in the set temperature difference range, the relatively large temperature fluctuation can be avoided in the indoor environment in the frosting stage of self-cleaning of the air conditioner, and the use experience of users when the air conditioner executes the self-cleaning mode can be effectively guaranteed.

The invention discloses an online pressure metal thermal treatment process and an online pressure metal thermal treatment device. According to the process, a pressure device is adopted to synchronously heat a workpiece and apply a pressure to the workpiece so as to realize thermal treatment and then discharging and cooling are automatically carried out. The metal thermal treatment device comprises a supporting body, a pressure mechanism, two heating mechanisms, a temperature control device, a time control device and a cooling mechanism, wherein the pressure mechanism comprises first and second pressure bases which are mounted in the supporting body and can be propped against each other and first and second driving mechanisms; first and second profiled grooves are respectively formed in the opposite surfaces of the first and second pressure bases; insulation structures are also arranged on the outer surfaces of the first and second pressure bases; the two heating mechanisms are respectively mounted in the first and second pressure bases; the temperature control accuracy of the temperature control device is 1 DEG C; the temperature control device is mounted outside the supporting body; the time control accuracy of the time control device is 1s; the time control device is mounted outside the supporting body; the cooling mechanism is mounted below the supporting body. According to the online pressure metal thermal treatment process and the online pressure metal thermal treatment device, the fact that the workpiece has qualified performance in the treatment process is guaranteed, and the phenomena of deformation, blowing-out discharging and the like are avoided.

The invention provides a wall top cutting device for dividing decoration areas based on water mist and dust suppression. plate and a T-shaped water distribution pipe, the baffle plate is set in a semicircular shape as a whole, and a rubber sealing ring is pasted on the circumference of its inner end surface; the bottom of the motor is locked and supported by a handle frame, and its front end is locked and installed There is a baffle plate; the central rotating shaft of the motor runs through the baffle plate and protrudes and rotates to be placed in the protective cover, and the cutting piece is locked and clamped and installed on the head end section of the motor central rotating shaft; the front end of the T-shaped water distribution pipe The two outlet pipes are locked and connected with the two spray pipes through the two water guide hoses, and the two spray pipes can be compressed. The two springs follow the rotary cutting of the cutting blade and slide down, so that the two top nozzles can be in contact with the cutting groove. Sliding and leveling, the cutting fume is aligned and precisely sprayed, and the dust reduction effect is remarkable.