Air fryer with stirring function

Abstract

The application relates to an air fryer with a stirring function, which is designed to solve the technical problem that the structure design of a stirrer of the existing similar products is poor, which leads to the occurrence of the conditions of easy reversal, reverse rotation and the like, the linkage, braking and stopping effects are poor, and the service life of the stirrer is short and the stability is poor. The clutch of the air fryer comprises a fixed seat, a compression spring and a coupler, the outer diameter of the coupler is sleeved and fixed to the inner diameter of the fixed seat, the compression spring is arranged at the sleeving position, the coupler is fixed to a screw rod protruding from the bottom of one end of the stirrer through a threaded hole in the top center of the coupler, and the inner wall in the coupler is provided with two limit ribs which are symmetrically arranged and protruded; when the fryer assembly is put into the shell, the transmission gear drives the transmission shaft to protrude and drive the convex rib of the transmission shaft to be separated from the blocking rib of the center hole of the inner lining, meanwhile, the convex rib of the transmission shaft is inserted into the limit rib in the coupler, the limit rib of the coupler is engaged with the convex rib of the transmission shaft to drive the stirrer to rotate.

Description

TECHNICAL FIELD

[0001] The present application relates to an air fryer, and is an air fryer with stirring function. BACKGROUND

[0002] The air fryer is a new type of household appliance that uses high-speed air circulation technology to fry food. It can reduce oil by 80% compared with traditional electric fryers, is easy to clean, safe and economical, and is favored by people. Some air fryers have a single or double stirring rod at the bottom, such as the Chinese patent documents disclosed in Application No. 201420126187.5, granted on October 15, 2014, and Utility Model Name "Air Fryer Pot Structure"; and Application No. 202220372409.6, granted on August 30, 2022, and Utility Model Name "Air Fryer Automatic Lifting and Rotating Structure". However, the above products and similar products have poor stirring structure design, which leads to easy reverse, reverse and other situations, poor linkage, braking and stopping effect, resulting in shorter service life and poor stability of the stirrer. SUMMARY

[0003] To overcome the above shortcomings, the purpose of the present application is to provide an air fryer with stirring function to the field, which solves the technical problem of poor stirring structure design of existing similar products, leading to easy reverse, reverse and other situations, poor linkage, braking and stopping effect, resulting in shorter service life and poor stability of the stirrer. The purpose is achieved through the following technical solutions.

[0004] The application discloses an air fryer with a stirring function, which is characterized in that a fryer assembly is arranged in an opening of one side of a shell, a transmission shaft is arranged in a central hole in the bottom of an inner lining, the bottom of the transmission shaft is sleeved with a gear shaft of a transmission gear, the outer diameter of the sleeve joint of the transmission shaft and the transmission gear is provided with a return spring fixed to the outer diameter of the transmission shaft through a snap spring, the transmission gear is engaged with a driving gear, the center of the driving gear is connected with an output shaft of a speed reducer motor, and the speed reducer motor is arranged in a base of a lower shell base assembly; a stirrer is arranged in the center of the bottom of the fryer, the bottom of one end of the stirrer is provided with a coupling fixed to the stirrer, and the stirrer is connected with the transmission shaft through the coupling. The coupling comprises a fixed seat, a compression spring and a coupler, the outer diameter of the coupler is sleeved and fixed to the inner diameter of the fixed seat, the sleeve joint is provided with the compression spring, the coupler is fixed to a screw rod protruding from the bottom of one end of the stirrer through a threaded hole in the top center of the coupler, and the inner wall of the coupler is provided with two limit ribs which are symmetrically arranged and protruded; when the fryer assembly is put into the shell, the limit ribs of the coupler are engaged with the convex ribs of the outer diameter of the transmission shaft to drive the stirrer to rotate. When the fryer assembly is put into the lower shell base assembly, the driving gear of the lower shell base assembly drives the transmission gear to rotate, the transmission gear drives the transmission shaft to be lifted upward, meanwhile, the transmission shaft is inserted into the coupler of the fryer assembly, the convex ribs of the transmission shaft are inserted into the limit ribs of the coupler and abut against the limit ribs to drive the stirrer to rotate.

[0005] The central hole in the bottom of the inner lining is arranged in one end of a protruded upper plane of the bottom of the inner lining, a lower groove is arranged in the bottom of a fryer cover assembly on one side of the fryer assembly corresponding to the central hole in the bottom of the inner lining, the bottom of the fryer cover assembly is higher than the bottom of the fryer, and a top aperture of the central hole in the bottom of the inner lining is provided with equidistantly distributed blocking ribs; the convex ribs are symmetrically arranged in the top outer diameter of the transmission shaft, the transmission shaft is sleeved into the central hole of the inner lining from above, the convex ribs of the transmission shaft are engaged with the blocking ribs at the central hole of the inner lining, the top of the transmission shaft is provided with an annular ring rib, one side of the symmetrically arranged helical surfaces of the ring rib is respectively provided with a helical starting surface and a helical ending surface which is perpendicular to the protrusion, the end of the gear shaft of the transmission gear is symmetrically provided with a protruded rib column, the two sides of the circular arc surface of the top of the rib column are respectively a circular arc starting surface and a circular arc ending surface, the rib column of the transmission gear is inserted into the ring rib of the transmission shaft, and the speed reducer motor is a forward and reverse stepping motor; when the fryer assembly is put into the shell, the transmission gear drives the transmission shaft to protrude and drives the convex ribs of the transmission shaft to be separated from the blocking ribs at the central hole of the inner lining, meanwhile, the convex ribs of the transmission shaft are inserted into the limit ribs in the coupler, the limit ribs of the coupler are engaged with the convex ribs of the transmission shaft to drive the stirrer to rotate. When the transmission gear drives the transmission shaft to be lifted upward, the circular arc surface of the transmission gear abuts against the helical surface of the transmission shaft to drive the transmission shaft to be lifted upward, and the helical ending surface on the vertical side of the helical surface stops the transmission shaft, the transmission gear drives the transmission shaft to rotate, and the rotation of the stirrer is realized; when the transmission gear stops rotating reversely, the circular arc surface of the transmission gear is separated from the helical surface and returns, the transmission shaft is retracted into the transmission gear and the central hole of the inner lining.

[0006] The end of the rib at the center hole of the inner liner is provided with a slanted tip head for clockwise rotation of the stirrer to be separated, and the groove between the slanted tip heads is a clamping groove for the rib. The above structure prevents the convex rib of the transmission shaft from continuing to reverse when the transmission shaft is retracted into the center hole of the inner liner, facilitating the lifting of the transmission shaft from the clamping groove when it rotates clockwise.

[0007] The top center of the transmission gear is provided with a central groove, the central groove of the transmission gear is sleeved into the transmission shaft, the bottom gear center of the transmission gear is provided with a positioning column, and the positioning column of the transmission gear is inserted into the positioning groove of the base. The above is convenient for air-tight communication between the transmission gear and the transmission shaft, and the stability of the transmission gear rotation.

[0008] One end of the stirring body of the screw of the stirrer is upwardly protruding in a semicircular shape, the outer diameter of the stirring body at this end is provided with a helically curved stirring head, the end of the stirring head is provided with a triangular head which is wider than the helically curved section and is helically curved, the bottom of the triangular head and the bottom of the helically curved section are attached to the inner bottom of the fryer, and the top of the triangular head and the top of the helically curved section are tapered from the center to both sides. The above is a specific structural embodiment of the stirring head of the stirrer.

[0009] The screw of the stirrer is integrally formed and fixed to the stirrer, the screw is fixedly arranged at the inner top center of the semicircular end of the stirring body of the stirrer, and the threaded hole of the coupler is a hexagonal nut center hole integrally formed in the coupler. The above is a specific structural embodiment of the fixation between the stirrer and the coupler.

[0010] The following is a specific structural embodiment of the shell and the upper shell: the shell comprises an upper cover assembly and a lower shell base assembly, the upper cover assembly and the lower shell base assembly are connected to form the shell, the upper cover assembly is provided with a heating and heat insulation body assembly, the top center of the heating and heat insulation body assembly is provided with a fan motor, one side of the fan motor is provided with a circuit board, the bottom of the heating and heat insulation body assembly is provided with a fan and a heating tube in a top groove, the motor shaft of the fan motor is connected with the fan, the heating tube and the fan are connected with the circuit board through a line, the lower shell base assembly on one side of the shell is provided with a fryer assembly in an opening, the top of the upper cover assembly is provided with a circular top cover assembly, the top of the top cover assembly is inclined to the opening side of the shell, and the shell is in a cylindrical shape with a large bottom and a small top.

[0011] The heating and heat insulation body assembly is provided with a partition cover, the partition cover is provided with a partition cavity, one side of the partition cavity is provided with an exhaust hole, and the partition cavity is provided with another fan.

[0012] The center of the top cover assembly is provided with a circular decorative cover, the upper cover assembly on one side of the fryer assembly is provided with a liquid crystal display window with two sides curved in an arc shape, and the center of the liquid crystal display window is provided with a remote control inductor.

[0013] One side of the top cover assembly or upper cover assembly is provided with an oil storage box, the oil storage box is connected with the oil injection assembly on one side of the heating pipe in the heat insulation body assembly through an oil pump and a pipeline, and the oil pump is connected with the circuit board through a line.

[0014] The application has reasonable structure design, convenient assembly and production, long service life, good linkage, braking and stopping effect of the stirrer, good stability and wide application range, and is mainly used as an air fryer with stirring function and is used for structural improvement of similar products. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is an embodiment part explosion structure schematic diagram of the application, and the framed part is an inner lining structure diagram and an inner lining frame part enlargement.

[0016] Figure 2 is a lower shell base assembly cross-sectional structure schematic diagram of Figure 1 .

[0017] Figure 3 is a frame part enlargement structure schematic diagram of Figure 2 .

[0018] Figure 4 is an inner transmission shaft and transmission gear explosion structure schematic diagram, and the framed part is a transmission shaft inner bottom structure schematic diagram. Figure 3

[0019] Figure 5 is a fryer assembly cross-sectional structure schematic diagram of Figure 1 .

[0020] Figure 6 is a frame part enlargement structure schematic diagram of Figure 5 .

[0021] Figure 7 is a fryer assembly explosion structure schematic diagram of Figure 5 .

[0022] Figure 8 is a stirrer bottom structure schematic diagram of Figure 7 .

[0023] Figure 9 is a coupler bottom structure schematic diagram of Figure 7 .

[0024] ​Serial number and name of the attached drawings: 1. Top cover assembly, 2. Upper cover assembly, 3. Heating and heat insulation assembly, 4. Lower shell base assembly, 401. Lining, 4011. Retaining rib, 4012. Upper plane, 402. Transmission shaft, 4021. Convex rib, 4022. Retaining spring groove, 4023. Spiral surface, 4024. Spiral starting surface, 4025. Spiral ending surface, 403. Speed ​​reduction motor, 404. Driving gear, 405. Retaining spring, 406. Transmission gear, 4 061. Arc surface, 4062. Arc starting surface, 4063. Arc ending surface, 407. Return spring, 408. Base, 5. Fryer assembly, 501. Agitator, 5011. Screw, 5012. Agitator, 5013. Agitator head, 502. Fixed seat, 503. Fryer, 504. Compression spring, 505. Coupler, 5051. Limiting rib, 5052. Threaded hole, 506. Fryer cover assembly, 507. Handle assembly. DETAILED DESCRIPTION

[0025] Now, the structure and use of the present invention will be further described in conjunction with the accompanying drawings. Figures 1-9 As shown, the upper cover assembly 2 of the air fryer is connected to the lower shell base assembly 4 to form a shell, a heating and insulating body assembly 3 is provided in the upper cover assembly, a frying pot assembly 5 is provided in the opening of the lower shell base assembly on one side of the shell, a circular top cover assembly 1 is provided on the top of the upper cover assembly, the top of the top cover assembly is inclined toward the opening side of the shell, and the shell is cylindrical with a larger bottom and a smaller top. A frying pot assembly 5 is provided in the opening on one side of the shell, a transmission shaft 402 is provided in the center hole of the bottom of the liner 401 at the opening, the bottom of the transmission shaft is inserted into the gear shaft of the transmission gear 406, the outer diameter of the transmission shaft and the transmission gear is provided with a return spring 407 fixed to the outer diameter of the transmission shaft by a retaining ring 405, the transmission gear is meshed with the driving gear 404, the center of the driving gear is connected to the output shaft of the reduction motor 403, and the reduction motor is arranged in the base of the lower shell base assembly; a stirrer 501 is provided at the bottom center of the frying pot 503 of the frying pot assembly, and a coupling is provided at the bottom of one end of the stirrer that is inserted into and fixed to the stirrer, and the stirrer is connected to the transmission shaft through the coupling. The coupling comprises a fixing seat 502, a compression spring 504 and a coupler 505. The outer diameter of the coupler is fitted and fixed to the inner diameter of the fixing seat. A compression spring is provided at the fitting location. The coupler is fixed to a screw 5011 extending from the bottom of one end of the agitator through a threaded hole 5052 in the center of the top of the coupler. The inner wall of the coupler is provided with two symmetrically arranged and raised limiting ribs 5051. When the fryer assembly is placed in the shell, the limiting ribs of the coupler engage with the rib 4021 on the outer diameter of the drive shaft 402 to drive the agitator to rotate.

[0026] Meanwhile, the center hole of the inner bottom is arranged at one end of the upper plane 4012 of the inner bottom protrusion, and the bottom of the corresponding side of the fryer cover assembly 506 of the fryer assembly is provided with a lower groove. The bottom of the fryer cover assembly is higher than the bottom of the fryer 503, and the top hole of the center hole of the inner bottom is provided with equidistantly distributed blocking ribs 4011. The protruding ribs 4021 are symmetrically arranged at the top outer diameter of the transmission shaft, the transmission shaft is sleeved into the center hole of the inner liner from above, the protruding ribs of the transmission shaft are engaged with the blocking ribs at the center hole of the inner liner, the top of the transmission shaft is provided with an annular ring rib, the helical surfaces 4023 symmetrically arranged on both sides of the ring rib are respectively provided with a helical starting surface 4024 and a helical termination surface 4025 perpendicular to the protrusion, the gear shaft end of the transmission gear 406 is symmetrically provided with a protruding rib column, and the circular arc surface 4061 at the top of the rib column is respectively provided with a circular arc starting surface 4062 and a circular arc termination surface 4063. The rib column of the transmission gear is inserted into the ring rib of the transmission shaft, and the reduction motor is a forward and reverse stepping motor. When the fryer assembly is placed in the shell, the transmission gear drives the transmission shaft to extend and drive the protruding ribs of the transmission shaft to disengage from the blocking ribs of the center hole of the inner liner, and at the same time, the protruding ribs of the transmission shaft are inserted into the limiting ribs 5051 in the coupler, the limiting ribs of the coupler are engaged with the protruding ribs of the transmission shaft to drive the stirrer to rotate.

[0027] The end of the blocking rib at the center hole of the inner liner is provided with a slanting tip head that can be rotated in the clockwise direction of the stirrer to disengage, and the groove between the slanting tip heads is a clamping groove of the blocking rib. The center groove is arranged at the top center of the transmission gear, the transmission gear is sleeved into the transmission shaft, the gear center at the bottom of the transmission gear is provided with a positioning column, and the positioning column of the transmission gear is inserted into the positioning groove of the base 408. The one end of the stirring body of the stirrer protrudes upward in a semicircle, one side of the outer diameter of the end of the stirring body is provided with a helically curved stirring head 5013, the end of the stirring head is provided with a triangular head larger than the width of the helically curved section and helically curved, the bottom of the triangular head and the bottom of the helically curved section are attached to the inner bottom of the fryer, and the top of the triangular head and the top of the helically curved section are tapered from the center to both sides. The screw is integrally formed on the stirrer, and the screw is fixedly arranged at the inner top center of the semicircular end of the stirring body of the stirrer. The threaded hole of the coupler is a hexagonal nut center hole integrally formed in the coupler.

[0028] The implementation method of the air fryer is as follows: 1. When the whole machine is started, the reduction motor starts to drive the driving gear to rotate, the transmission gear meshing with the driving gear also rotates, and the arc surface on the transmission gear also slides on the spiral surface on the transmission shaft, thereby driving the transmission shaft to ascend; since the convex rib on the transmission shaft is clamped in the clamping groove composed of multiple blocking ribs of the inner liner, the transmission shaft cannot rotate, so that the transmission shaft can only move upward, and the transmission shaft also enters the coupler at the same time; when the convex rib of the transmission shaft moves out of the clamping groove of the blocking rib and exceeds the upper plane of the inner liner, the blocking rib also ascends into the coupler, and the arc end surface of the transmission gear also slides to the terminal point of the spiral surface, and the arc end surface of the transmission gear is attached to the spiral end surface of the transmission shaft; at this time, the transmission shaft no longer ascends, but only rotates; when the convex rib of the transmission shaft rotates to the limiting rib of the coupler, the coupler is driven to rotate together; since the stirrer and the coupler are connected together through threads, the stirrer also rotates. The screw of the stirrer and the threaded hole of the coupler are threads opposite to the rotation direction of the stirrer, so that the screw does not loosen during rotation. 2. When the whole machine stops working, the reduction motor rotates reversely, the transmission gear also reverses, the transmission shaft also reverses downward under the action of the return spring, gradually separates from the contact with the coupler, the convex rib of the transmission shaft gradually falls into the clamping groove composed of the blocking rib of the inner liner, and stops moving.

[0029] In summary, the air fryer can make the food heated more evenly, and some food materials that need to be turned over during baking do not need to be turned over, so that the baking is faster and the time is shorter. The transmission shaft of the air fryer is located in the center of the inner liner at the bottom, the convex rib is located in the clamping groove composed of multiple blocking ribs, the clamping groove is a groove between the equidistantly distributed inclined pointed heads in the blocking rib, the return spring is sleeved on the outer cylindrical surface of the transmission shaft, one end of the return spring is abutted against the bottom step of the inner liner center hole, the other end of the return spring is abutted against the snap spring, the snap spring is fixed in the snap spring groove 4022 at one end of the transmission shaft, one end of the transmission gear is arranged in the center hole of the transmission shaft, the other end of the transmission gear is sleeved in the base, the transmission gear is meshed with the driving gear, the driving gear is fixed on the output shaft of the reduction motor, the compression spring is sleeved on the outer cylindrical surface of the coupler, and the compression spring is arranged in the fixed seat together, the fixed seat is fixed on the center hole at the bottom of the air fryer, and the stirrer is fixed on the coupler.

Claims

1. An air fryer with a stirring function, wherein a frying pot assembly (5) is provided in an opening on one side of a shell of the air fryer, a transmission shaft (402) is provided in a central hole at the bottom of an inner lining (401) at the opening, a gear shaft of a transmission gear (406) is inserted into the bottom of the transmission shaft, a return spring (407) is provided on the outer diameter of the part where the transmission shaft and the transmission gear are inserted, and the return spring (407) is fixed to the outer diameter of the transmission shaft through a retaining ring (405), the transmission gear is meshed with a driving gear (404), the center of the driving gear is connected to the output shaft of a reduction motor (403), and the reduction motor is arranged in the base of the lower shell base assembly (4); a stirrer (501) is provided at the center of the bottom of the frying pot (503) of the frying pot assembly, a coupling is provided at the bottom of one end of the stirrer and is inserted into and fixed to the stirrer, and the stirrer is connected to the transmission shaft through the coupling; it is characterized in that The coupling comprises a fixed seat (502), a compression spring (504) and a coupler (505); the outer diameter of the coupler is fitted and fixed to the inner diameter of the fixed seat; a compression spring is provided at the fitting position; the coupler is fixed to a screw (5011) extending from the bottom of one end of the stirrer through a threaded hole (5052) at the top center of the coupler; the inner wall of the coupler is provided with symmetrically arranged and raised limiting ribs (5051); when the fryer assembly (5) is placed in the shell, the limiting ribs of the coupler are aligned with the transmission shaft. The convex ribs (4021) of the outer diameter of (402) are engaged to drive the agitator to rotate; the center hole of the bottom of the lining (401) is set at one end of the upper plane (4012) raised on the bottom of the lining, and the bottom of the frying pot cover assembly (506) on one side of the frying pot assembly (5) corresponding to the upper plane is provided with a lower groove, the bottom of the frying pot cover assembly is higher than the bottom of the frying pot (503), and the top opening of the center hole of the lining bottom is provided with equidistantly distributed retaining ribs (4011); the convex ribs (4021) are symmetrically arranged on the transmission The top outer diameter of the shaft (402) is such that the transmission shaft is inserted into the center hole of the liner from the top of the liner, the convex rib of the transmission shaft engages with the retaining rib at the center hole of the liner, the top of the transmission shaft is provided with an annular ring rib, the spiral surfaces (4023) symmetrically arranged on both sides of the ring rib are provided with a spiral starting surface (4024) and a spiral ending surface (4025) perpendicular to the convex side, the gear shaft end of the transmission gear (406) is symmetrically provided with a raised rib column, and the arc surface (4061) at the top of the rib column is provided with a spiral starting surface (4024) and a spiral ending surface (4025) perpendicular to the convex side. The two side surfaces are respectively an arc starting surface (4062) and an arc ending surface (4063), the rib column of the transmission gear is inserted into the ring rib of the transmission shaft, and the reduction motor (403) is a forward and reverse stepping motor; when the fryer assembly is placed in the shell, the transmission gear drives the transmission shaft to extend and drives the convex rib of the transmission shaft to separate from the retaining rib of the inner lining center hole. At the same time, the convex rib of the transmission shaft is inserted into the limiting rib (5051) in the coupler (505), and the limiting rib of the coupler engages with the convex rib of the transmission shaft to drive the stirrer (501) to rotate.

2. The air fryer with stirring function according to claim 1, characterized in that An oblique pointed end is provided at the end of the retaining rib (4011) at the central hole of the liner (401), which is disengaged when the stirrer (501) rotates clockwise, and a groove between the oblique pointed ends serves as a clamping groove for the retaining rib.

3. The air fryer with stirring function according to claim 1, characterized in that A center groove is provided at the top center of the transmission gear (406), and the center groove of the transmission gear is inserted into the transmission shaft (402). A positioning column is provided at the bottom gear center of the transmission gear, and the positioning column of the transmission gear is inserted into the positioning groove of the base (408).

4. The air fryer with stirring function according to claim 1, characterized in that One end of the stirring body (5012) at the screw (5011) of the stirrer (501) is upwardly protruding in a semicircular shape, and a spirally curved stirring head (5013) is provided on one side of the outer diameter of the stirring body at this end. The end of the stirring head is provided with a triangular head that is larger than the width of the spirally curved section and is spirally curved. The bottom of the triangular head and the bottom of the spirally curved section are attached to the bottom of the fryer (503), and the top of the triangular head and the top of the spirally curved section are tapered from the center to both sides.

5. The air fryer with stirring function according to claim 4, characterized in that The screw (5011) of the stirrer (501) is integrally formed and fixed to the stirrer, and the screw is fixedly arranged at the top center of one semicircular end of the stirring body (5012) of the stirrer, and the threaded hole (5052) of the coupler (505) is the center hole of the hexagonal nut integrally formed in the coupler.

6. The air fryer with stirring function according to claim 1, characterized in that The shell comprises an upper cover assembly (2) and a lower shell base assembly (4), wherein the upper cover assembly and the lower shell base assembly are connected to form the shell, a heating and heat-insulating body assembly (3) is provided in the upper cover assembly, a fan motor is provided at the top center of the heating and heat-insulating body assembly, a circuit board is provided on one side of the fan motor, a fan and a heating tube are provided in the top groove at the bottom of the heating and heat-insulating body assembly, a motor shaft of the fan motor is connected to the fan, and the heating tube and the fan are connected to the circuit board through a line, a frying pot assembly (5) is provided in the opening of the lower shell base assembly on one side of the shell, a circular top cover assembly (1) is provided on the top of the upper cover assembly, the top of the top cover assembly is inclined toward the opening side of the shell, and the shell is cylindrical with a larger bottom and a smaller top.

7. The air fryer with stirring function according to claim 6, characterized in that The heating and heat insulation assembly (3) is provided with an interlayer cover, a interlayer cavity is provided in the interlayer cover, an exhaust hole is provided on one side of the interlayer cavity, another fan blade is provided in the interlayer cavity, and the motor shaft of the fan blade motor is connected to the two fan blades at the same time.

8. The air fryer with stirring function according to claim 6, characterized in that A circular decorative cover is provided at the center of the top cover assembly (1), and an upper cover assembly (2) above one side of the fryer assembly (5) is provided with a liquid crystal display window with curved surfaces on both sides, and a remote control sensor is provided at the center of the liquid crystal display window.

9. The air fryer with stirring function according to claim 6, characterized in that An oil storage box is provided on one side of the top cover assembly (1) or the upper cover assembly (2), and the oil storage box is connected to the oil injection assembly on one side of the heating pipe in the heating insulation assembly (3) through an oil pump and a pipeline, and the oil pump is connected to the circuit board through a line.

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