50results about How to "Facilitate mass industrial production" patented technology

The invention provides a water-based gel casting method for structural ceramics. Organic monomers, cross-linking agents and dispersing agents are dissolved in deionized water to be prepared into a mixed solution. Plasticizers are added in the mixed solution to be prepared into a raw material solution. Ceramic powder is added in the raw material solution and subjected to ball milling to obtain a ceramic slurry; initiators and stimulation agents are added in the ceramic slurry, bubbles dissolved in the ceramic slurry are removed in vacuum after the mixture is evenly stirred, and the mixture is injected in molds to be molded to obtain solidified wet ceramic blanks; the solidified wet ceramic blanks are dried to obtain dry blanks, and the dry blanks are subjected to processing and thermal treatment to be produced into ceramic products. In the technological process, glycerol or Tween 80 is used as plasticizers, so that the plasticity of the molded blanks is improved, residual stress of the blanks is reduced, defects such as cracking during drying are prevented, the ceramic blanks are high in compactness, good in plasticity, uniform in structure and suitable for batch industrial production.

The invention provides a high hardness wear-resistant fingerprint-proof nano coating for a PC material and a preparation method of the high hardness wear-resistant fingerprint-proof nano coating. Theraw materials formula of the high hardness wear-resistant fingerprint-proof nano coating is prepared from the following components in parts by weight: 20-30 parts of matrix resin, 8-10 parts of a high-functional monomer, 3-5 parts of a low-functional monomer, 2-3 parts of a fluorine-containing functional monomer, 0.5-1.5 parts of an inorganic filler, 2-3 parts of an auxiliary agent, 1-3 parts of aphotoinitiator and 1-3 parts of a composite solvent. The matrix resin is a mixture of at least three polyurethane acrylates with different degrees of functionality, and respectively selected from 6-9functional, 9-10 and 10-15 functional aliphatic polyurethane acrylates; the high-functional monomer is 6 functional dipentaerythritol hexaacrylate, the low-functional monomer is one or two of 2 functional and 3 functional acrylate monomers; and the inorganic filler is nano-diamond particles. According to the high hardness wear-resistant fingerprint-proof nano coating, the preparation process is simple and efficient, mass production is convenient, the prepared coating is high in hardness, wear-resistant, fingerprint-proof, good in weather resistance and long in service life, and has good application prospects in the fields of automobiles and mobile phones.

A method for pickling sour vegetable includes such steps as providing Chinese cabbage, cabbage, radish, etc, immersing in boiling water, immersing in cold water, immersing in lactics liquid, loading bag, holding the temp while souring, water washing, sealing in containers, low-temp souring, and water washing. Its advantages are good taste, low content of nitrite.

The invention discloses a phase change heat storage type electric heating floor. The phase change heat storage type electric heating floor comprises a floor main body and an electric heating assembly. Socket positions which are connected with the adjacent electric heating floor portions during usage are formed on the periphery of the floor. The phase change heat storage type electric heating floor is characterized by also comprising a flat phase change unit; the floor main body comprises a panel component and a base plate; the corresponding positions of the panel component and the base plate in the vertical direction are bonded and fixed together to form the floor main body, wherein the inside of the floor main body comprises the first installation space; the electric heating assembly comprises an electric heating piece, a transmission unit and connection sockets which are located at the front end and the rear end of the electric heating piece respectively and used for performing electrical connection externally; the electric heating piece and the phase change unit are fixedly arranged in the first installation space of the floor main body; the panel component, the electric heating piece, the phase change unit and the base plate are arranged in turn from top to bottom and are in close contact with each other in turn in the vertical direction.

The invention provides a phosphate-containing high-adaptability early-strength polycarboxylate superplasticizer, and a preparation method and application thereof, and relates to the technical field of concrete admixtures. The phosphate-containing high-adaptability early-strength polycarboxylic acid water reducer is prepared by copolymerizing 90 to 110 parts of unsaturated polyether macromonomer, 10 to 20 parts of unsaturated carboxylic acid and 1 to 6 parts of phosphate-containing acrylamide free radical. A polyacrylic acid derivative and a polyether side chain on the molecular chain of the water reducing agent provide dispersing performance, the phosphate ester-containing polyacrylamide improves the adaptability of the water reducing agent due to the existence of a phosphate group on one hand, and amido balances the retarding effect of the phosphate group on the other hand, and also improves the early strength effect of the product. Therefore, the cement early strength agent has better adaptability and early strength effect when being used for mixing different types of cement and high-mud-content aggregate concrete.

The invention relates to the technical field of textile products, in particular to a textile product with a waterproof breathable coating and a method for preparing the textile product. The textile product comprises a base material, the waterproof breathable coating, a cover layer, and a plurality of cords or coarse fiber strips and fine fiber strips. The waterproof breathable coating is coated onthe upper surface of the base material, the cords or the coarse fiber strips and the fine fiber strips are uniformly arranged on the outer surface of the waterproof breathable coating at intervals, the cover layer can breathe and covers the multiple cords or the coarse fiber strips and the fine fiber strips, and protrusions and grooves are formed. The textile product and the method have the advantages that the textile product has excellent waterproof breathable functions and is excellent in thermal insulation property and drainage and long in service life; besides, processes for preparing thetextile product are simple and are high in production efficiency, mass industrial production can be facilitated, and the textile product and the method have broad market prospects.

The invention relates to the technical field of medicinal minimally invasive instruments, in particular to a system for taking an endoscope specimen. The system comprises a taking tool mechanism and a taking executing mechanism. The taking tool mechanism comprises a quick-change connector, a quick-change device sleeve, a pushing rod and an outer sleeve. One end of the pushing rod is connected with the quick-change device sleeve and the quick-change connector, and the pushing rod and the outer side of the quick-change device sleeve are arranged inside the outer sleeve in a sleeved mode; the taking executing mechanism comprises a taking outer sleeve, a taking bag and a cross joint, and the taking bag and the cross joint are arranged inside the taking outer sleeve in a sleeved mode; the quick-change connector of the quick-change device sleeve is connected with the cross joint of the taking bag, and the outer sleeve is connected with the taking outer sleeve. The taking tool mechanism can be repeatedly sterilized for usage, so that the using cost of equipment is substantially lowered. Positioning grooves are formed in the outer side of the quick-change device sleeve, and positioning bosses are arranged on the outer sleeve and clamped to the positioning grooves. The outer sleeve is positioned, the pushing rod and the quick-change device sleeve are effectively prevented from axially moving when the system is used, and therefore a doctor can operate conveniently.

The invention discloses industrialized spicy crawfishes. The spicy crawfishes are spicy, fresh and aromatic, spicy but not dry, and not easy to cause excessive inner heat. The invention also disclosesa manufacturing method of the industrialized spicy crawfishes, wherein the method comprises the following technical steps: cooking crawfishes; and pouring crawfishes seasoning soup base onto the cooked crawfishes. The method has the advantages of simple process and convenient operation, can be used for batch industrial production, and promotes large-scale earnings of the spicy crawfishes.

The invention discloses a spontaneous heating floor, which is characterized by comprising a panel, a soleplate and a spontaneous heating component. The heating body of the spontaneous heating component is an electric heating plate. The panel is adhered on the soleplate from above to form a main floor body with an inner cavity. The electric heating plate of the spontaneous heating component is arranged in the inner cavity of the main floor body. Power supply plug connectors belonging to the spontaneous heating components are arranged on the front and back sides of the main floor body. The power supply plug connectors are reliably limited and fixed in the main floor body and are capable of realizing electric connection and current transmission with an adjacent spontaneous heating floor at an insertion hole position exposed outwards from the power supply plug connectors and provided with copper inserting pins by means of a corresponding electric connecting component; and in the invention, the spontaneous heating floor is installed simply and conveniently, and a technical guarantee for safe and reliable application, high heat efficiency and durable structure is provided.

The invention discloses an energy-saving type air-conditioning shoe with air-conditioning energy generated by weight of a human body. The energy-saving type air-conditioning shoe comprises an air bag, wherein the air bag comprises an elastic wall, an upper heat-insulation sole and a lower heat-insulation sole; the upper heat-insulation sole is hermetically connected with the top of the elastic wall; the lower heat-insulation sole is hermetically connected with the bottom of the elastic wall; an air groove is formed in the upper heat-insulation sole; a heat transfer plate is placed on the air groove; a compressed air outlet and a first air discharging opening are formed in the lower heat-insulation sole; the compressed air outlet is connected with a compressed air inlet formed in a vortex tube through a pipeline; a one-way valve is arranged on a pipeline between the compressed air outlet and the compressed air inlet; the vortex tube is provided with a discharging port and a second air discharging opening; the discharging port is connected with one end of the air groove formed in the upper heat-insulation sole through a pipeline; and a third air discharging opening is formed in the other end of the air groove in the upper heat-insulation sole. The energy-saving type air-conditioning shoe has the advantages of energy conversation, environmental protection, convenience, reliability, low cost and long service life.

The invention relates to a graphite tank for sintering a silicon carbide ceramic tube, a high-performance silicon carbide ceramic tube and a preparation method of the high-performance silicon carbideceramic tube. The graphite tank is a V-shaped graphite tank with an arc vertex angle, the diameter of the arc part of the arc vertex angle is equal to the sum of the outer diameter of the required silicon carbide ceramic tube and (0.1-0.3) mm, the angle alpha of the V-shaped graphite tank is equal to 2*arcsin (m / M)-x, wherein x is larger than or equal to 0 and smaller than or equal to 2, m is themaximum mass per unit length of the corresponding silicon carbide ceramic tube biscuit when the outer diameter roundness of the silicon carbide ceramic tube obtained after degreasing and sintering ofthe silicon carbide ceramic tube biscuit on a planar graphite plate can be kept at + / -0.1 mm, M is the mass per unit length of the to-be-degreased and to-be-sintered silicon carbide ceramic tube biscuit, and M is larger than m and smaller than or equal to 8.0 g / cm. According to the graphite tank, the silicon carbide ceramic tube is attached to the arc vertex angle to the maximum extent when the sintering shrinkage process is finished, and the straightness, the roundness and the strength of the ceramic tube are improved.

The invention relates to the environmental protection field, in particular to a double-layer filter bag for flue gas treatment. The double-layer filter bag is made from a double-layer fabric, which includes an outer filter cloth, an inner filter cloth and connecting lines connecting the inner filter cloth and the outer filter cloth. Gas pressure sensors are arranged between the inner filter clothand the outer filter cloth. The double-layer filter bag provided by the invention not only makes full use of the pressure of flue gas itself, but also increases the filtering efficiency, at the same time does not cause excessive resistance, also eliminates a complex filter bag cage structure, and only uses an ordinary structure filter bag frame. The filter bag also can simply and conveniently judge whether holes exist in the filter bag, and manual tour inspection is not needed. At the same time, the making process of the filter bag provided by the invention is simple, has high production efficiency, and is convenient for mass industrial production.

The invention discloses an integrated spontaneous heating floor board which comprises a floor board main body and a spontaneous heating assembly. The floor board main body comprises a face plate and a bottom main body. The spontaneous heating assembly is arranged between the face plate and the bottom main body. The face plate is fixedly connected with the bottom main body from top to bottom. The integrated spontaneous heating floor board is characterized in that the floor board main body is provided with an internal cavity. Plug-in portions are arranged on the periphery of the floor board main body. The spontaneous heating assembly is a waterproof electric heating assembly which comprises electric heating pieces, a transmission unit and two mounting seats, wherein the two mounting seats are respectively arranged at the left end and the right end of the electric heating pieces. The electric heating pieces are electrically connected with the transmission unit through electrodes of the electric heating pieces and corresponding electric connection components. The electric heating pieces of the spontaneous heating assembly are arranged in the internal cavity of the floor board main body. The mounting seats of the spontaneous heating assembly are fixedly connected and embedded in the floor board main body, and the two mounting seats are respectively exposed out of the left side and the right side of the floor board main body. Therefore, the left mounting seat and the right mounting seat of the spontaneous heating assembly are used as corresponding power supply plug connecting pieces on the left side and the right side of the integrated spontaneous heating floor board.

The invention relates to a preparation method of perovskite material powder. The method mainly comprises the following steps of: mixing a component 1 and a component 2, dissolving in a good solvent A, fully stirring and filtering to obtain a mixed precursor solution, adding an anti-solvent B into the mixed precursor solution, rapidly stirring until perovskite microcrystal precipitate is generated, cleaning the precipitate, and carrying out vacuum drying to obtain perovskite material powder. According to the preparation method disclosed by the invention, high-purity and impurity-phase-free perovskite material powder can be synthesized by using low-purity raw materials and is used for preparing various efficient film devices; and the technological process is simple and rapid, high-temperature heating is not needed, and high-flux industrial synthesis is facilitated.

The invention relates to the technical field of textiles, and specifically relates to a multifunctional non-woven fabric with a high a polymer coating and a production method. The multifunctional non-woven fabric takes super absorbent fiber, low melting point fiber, a graphene sizing agent and the like as raw materials, and is prepared through the steps of opening mixing, carding, lapping, needling, hot melting powder spreading, hot rolling adhesion, coating and the like. According to the multifunctional non-woven fabric with the high a polymer coating prepared with the method, an electromagnetic shielding function, water absorption and moisture prevention functions are smartly combined into one body, so that the range and application of industrial textiles are broadened, and simultaneously, the graphene coating is in wavy distribution, and the service life of the multifunctional non-woven fabric is prolonged. The multifunctional non-woven fabric is simple in manufacturing technology,high in production efficiency and convenient for industrial production on a large scale.

The invention discloses a lower installation base of an installation base and a covering plate of the installation base. The lower installation base is an integrated injection molded piece; the lower installation base comprises a connecting part, a stair flange part and a lower half socket part; the connecting part of the lower installation base is connected with the lower half socket part through the back side; the covering plate is composed of an upper half socket part at the front part of the covering plate and a pressing plate part at the rear part of the covering plate; the upper side plane of the pressing plate part and the upper side plane of the upper half socket part are at the same plane; the lower side plane of the pressing plate is higher than the lower end face of the upper half socket part; and the covering plate is installed at the lower half socket part and on the connecting part of the lower installation base in a manner of being in match from up to bottom so as to compose a corresponding installation base.

The invention provides a monomer cylindrical multi-directional constant-stiffness all-metal vibration absorber which comprises a mounting shaft, an axial lower end limiting stopper, an axial upper end limiting stopper, an axial vibration reduction medium, a first shell, a second shell, a radial limiting stopper and a radial vibration reduction medium, wherein the axial and radial vibration reduction components are of mutually independent structures; the axial vibration reduction component is cylindrical; the radial vibration reduction component is annular; the axial vibration reduction component is arranged in the radial vibration reduction component. By virtue of the unique design method of the vibration reduction components, multi-directional constant stiffness can be realized, the purpose of ensuring mutually-independent axial and radial stiffness regulation can be achieved, and the axial and radial resonant frequency intercoupling problem is radically solved; by virtue of controlling the densities of the vibration reduction media in the vibration reduction components, the resonant frequency points can be accurately controlled, the difference between the axial resonant frequency and the radial resonant frequency is controlled within + / -0.5Hz, and the usage requirements of vehicles, ships, airplanes and rockets in various occasions and the requirements for the multi-directional constant-stiffness vibration isolation and long-term storage of various instruments are met.

The invention discloses a connection seat component of an electric heating floorboard, which comprises two leads. The connection seat component of the electric heating floorboard is characterized by further comprising a connection seat and two conductive connectors; the connection seat comprises a first connection hole, a second connection hole, a first pin hole, a second pin hole, a rear cavity body and a lead hole; the opening of the lead hole is backward and is communicated with the rear cavity; the two conductive connectors are respectively a left-side conductive connector and a right-side conductive connector according to the different left and right location places; both the left-side conductive connector and the right-side conductive connector comprise copper pins and rear-side parts located at the rear parts of the copper pins; the rear section of the copper pin of the left-side conductive connector is located in the first pin hole of the connection seat and the two are matched in a sealing mode; the rear side part of the left-side conductive connector is electrically connected with the first lead of the two leads; the rear section of the copper pin of the right-side conductive connector is located in the second pin hole of the connection seat and the two are matched in a sealing mode; and the rear side part of the right-side conductive connector is electrically covenanted with the second lead of the two leads.

The invention discloses a phase change heat storage type electric heating floor. The phase change heat storage type electric heating floor comprises a floor main body and an electric heating assembly. Socket positions which are connected with the adjacent electric heating floor portions during usage are formed on the periphery of the floor. The phase change heat storage type electric heating floor is characterized by also comprising a flat phase change unit; the floor main body comprises a panel component and a base plate; the corresponding positions of the panel component and the base plate in the vertical direction are bonded and fixed together to form the floor main body, wherein the inside of the floor main body comprises the first installation space; the electric heating assembly comprises an electric heating piece, a transmission unit and connection sockets which are located at the front end and the rear end of the electric heating piece respectively and used for performing electrical connection externally; the electric heating piece and the phase change unit are fixedly arranged in the first installation space of the floor main body; the panel component, the electric heating piece, the phase change unit and the base plate are arranged in turn from top to bottom and are in close contact with each other in turn in the vertical direction.

The invention discloses a self-heating type floor decoration brick, and is characterized by comprising a floor tile panel, a floor tile lower seat and a self-heating assembly. A heating unit of the self-heating assembly is an electric heating piece. The floor tile is stuck and fixed above the floor tile lower seat to form a floor tile main body provided with an inner cavity. The electric heating piece of the self-heating assembly is arranged in the inner cavity of the floor tile main body. Power supply plug connectors of the self-heating assembly are arranged on the front side and the back side of the floor tile main body. The power supply plug connectors are reliably limited and fixed in the floor tile main body and can be used for electric connection with an adjacent electric heating floor tile and transmission of current by externally protruded spliced eye positions provided with copper contain pins through corresponding electric connection assemblies, so that the electric heating floor tile has the advantages of being simple and convenient to install, safe and reliable to use, higher in heat efficiency, durability and structurally providing technical supports.

The invention relates to the environmental protection field, in particular to a flue gas dedusting filter bag. A filter material for preparation of the filter bag has a double-layer structure. The filter material comprises an outer filter cloth, an inner filter cloth and connecting lines connecting the inner filter cloth and the outer filter cloth. The inner filter cloth serves as a dust-ward layer, and includes a base cloth layer and a fiber mesh layer. The base cloth layer has a negative Poisson's ratio, and the fiber mesh layer is compounded on the base cloth layer by needle punching technology. The filter bag provided by the invention has a double-layer structure, not only makes full use of the pressure of flue gas itself, but also increases the filtering efficiency. The base cloth layer of the filter material for preparation of the filter bag has a negative Poisson's ratio, can protect the primary dust from being destroyed as far as possible while fully cleaning secondary dust. Atthe same time, during ash cleaning, secondary dust can be fully cleaned up under the circumstance of small flap force. In addition, the filter bag provided by the invention has the advantages of simple making process, high production efficiency, and convenience for mass industrial production, etc.

The invention discloses a degradable composite nanofiber. The composite nanofiber is prepared from star-shaped poly(L-lactide), poly trimethylene carbonate and poly epsilon-caprolactone through an electrostatic spinning method, wherein the weight ratio of the three components is (40-60) to (10-30) to (20-40). The degradable composite nanofiber is characterized in that the star-shaped poly(L-lactide) takes pentaerythritol as a core. The invention further discloses a preparation method and application of the degradable composite nanofiber. The degradable composite nanofiber is small in diameter, uniform in distribution and large in specific surface area, has excellent mechanical property and biodegradation property, can meet demands of tissue engineering material, and is beneficial to the adhesion, growth and differentiation of cells. Meanwhile, the preparation method is simple and controllable, and is beneficial to batch industrial production.

The invention provides a monomer cylindrical multi-directional constant-stiffness all-metal vibration absorber which comprises a mounting shaft, an axial lower end limiting stopper, an axial upper end limiting stopper, an axial vibration reduction medium, a first shell, a second shell, a radial limiting stopper and a radial vibration reduction medium, wherein the axial and radial vibration reduction components are of mutually independent structures; the axial vibration reduction component is cylindrical; the radial vibration reduction component is annular; the axial vibration reduction component is arranged in the radial vibration reduction component. By virtue of the unique design method of the vibration reduction components, multi-directional constant stiffness can be realized, the purpose of ensuring mutually-independent axial and radial stiffness regulation can be achieved, and the axial and radial resonant frequency intercoupling problem is radically solved; by virtue of controlling the densities of the vibration reduction media in the vibration reduction components, the resonant frequency points can be accurately controlled, the difference between the axial resonant frequency and the radial resonant frequency is controlled within + / -0.5Hz, and the usage requirements of vehicles, ships, airplanes and rockets in various occasions and the requirements for the multi-directional constant-stiffness vibration isolation and long-term storage of various instruments are met.

The invention relates to the environmental protection field, in particular to an ash easily removable filter bag. The filter material for preparation of the filter bag comprises a base cloth layer anda fiber mesh layer, the base cloth layer has a negative Poisson's ratio, and the fiber mesh layer is compounded on the base cloth layer by needle punching technology. Compared with the prior art, theinvention provides the ash easily removable filter bag, when ash removal is conducted on the filter bag, primary dust can be protected from being destroyed as much as possible while secondary dust isfully cleaned up. At the same time, during ash removal, secondary dust can be fully cleaned under the circumstance of a small flap force. According to the filter material used by the filter bag provided by the invention, through cooperation of the base cloth layer with a negative Poisson's ratio and the fiber mesh layer compounded to the same by needle punching, fine adjustment of gaps inside thefilter material can be realized. In addition, the filter bag provided by the invention also has the advantages of simple making process, high production efficiency, convenience for mass industrial production, etc.

The invention discloses energy-saving air-conditioning shoes using the weight of the human body as an air-conditioning energy source. Bottom; said heat-insulating upper bottom is provided with an air groove, and a heat transfer sheet is placed on said air groove; said heat-insulated lower bottom is provided with a compressed air outlet and a first air outlet; said compressed air The outlet is connected to the compressed air inlet provided on the vortex tube through a pipeline, and a check valve is installed on the pipeline between the compressed air outlet and the compressed air inlet; the vortex tube is provided with an output port and a second An air outlet, and the output port is connected to one end of the air groove on the heat-insulating upper bottom through a pipeline, and the other end of the air groove on the heat-insulating upper bottom is provided with a third air outlet. The invention has the characteristics of energy saving and environmental protection, convenience and reliability, low cost and long service life.

The invention discloses a fibre containing nanopore network prepared from high voltage electrostatic spinning. The fibre containing nanopore network is prepared from the following steps: blending the polypropylene carbonate, polycaprolactone and L-polylactide-tetracalcium phosphate at a mass ratio of (40-98):(1-40):(1-20) and a conductive metal salt which accounts for 0.2-0.5% of the total mass of the three materials, and preparing from a high voltage electrostatic spinning method; the electron microscopy image shows that the fibre is formed by a plurality of mutually connected nanopore networks, and the specific surface area is 115.76-180.45 m<2> / g. The invention further discloses application of the nanopore network fibre in the cartilage tissue engineering. The mutually connected nanopore networks can be formed at the surface and interior of the fibre, so that the specific surface area is increased; because of the good biocompatibility and biodegradability, the cartilage growth capability in the cartilage tissue engineering can be well guided. The fibre containing nanopore network is simple in preparation method, controllable and convenient for mass industrial production.

The invention discloses a self-heating assembly, which is characterized by being a waterproof electric heating assembly. The self-heating assembly comprises an electric heating piece, a transmission unit and two mounting seats respectively located on the front and rear ends of the electric heating piece. The front end and the rear end of the electric heating piece are respectively provided with a flaked sealed waterproof electric heating device of an electrode. A fire wire unit of the transmission unit is penetrated by a first penetrating connector thereof and electrically connected to one electrode of the electric heating piece, and a zero wire unit is penetrated by a second penetrating connector thereof and electrically connected to the other electrode of the electric heating piece. Two mounting seats are divided into a front side mounting seat and a rear side mounting seat according to the different locations. Each mounting seat comprises a lower mounting seat located beneath and a cover plate inserted into the lower mounting seat from top to bottom. A part where components of the transmission unit are electrically connected to each other and a part where the transmission unit is electrically connected with the electric heating piece in a penetrating way are respectively arranged in the corresponding mounting seat hermetically.

The invention discloses a self-heating assembly, which is characterized by being a waterproof electric heating assembly. The self-heating assembly comprises an electric heating piece, a transmission unit and two mounting seats respectively located on the front and rear ends of the electric heating piece. The front end and the rear end of the electric heating piece are respectively provided with a flaked sealed waterproof electric heating device of an electrode. A fire wire unit of the transmission unit is penetrated by a first penetrating connector thereof and electrically connected to one electrode of the electric heating piece, and a zero wire unit is penetrated by a second penetrating connector thereof and electrically connected to the other electrode of the electric heating piece. Two mounting seats are divided into a front side mounting seat and a rear side mounting seat according to the different locations. Each mounting seat comprises a lower mounting seat located beneath and a cover plate inserted into the lower mounting seat from top to bottom. A part where components of the transmission unit are electrically connected to each other and a part where the transmission unit is electrically connected with the electric heating piece in a penetrating way are respectively arranged in the corresponding mounting seat hermetically.