Safety switch for electric heater and electric heater

Abstract

The invention discloses a safety switch for an electric heater and the electric heater, and belongs to the technical field of electric heaters, the safety switch comprises a mounting shell, a main connector is fixedly mounted at one end in the mounting shell, a secondary connector is arranged at the position, symmetrical to the main connector, in the mounting shell, and a plurality of connecting ends are slidably connected in the secondary connector; a connecting plate is fixedly installed between the connecting ends, the ends, close to the main connector, of the connecting ends are matched with the main connector, a plurality of main heating pipes are fixedly installed on the main connector, a plurality of auxiliary heating pipes are fixedly installed on the auxiliary connector, the auxiliary heating pipes are parallel to the main heating pipes, and an upper installing cover is fixedly installed at the upper end of the installing shell. Ventilation grooves are formed in the lower end of the installation shell and the upper installation cover, an upper movable plug is arranged at the upper end ventilation groove in a sliding mode, and a lower movable plug is arranged at the lower end ventilation groove in a sliding mode. When the safety switch stops running of the electric heater, the possibility of fire occurrence of the electric heater is restrained, the possibility of accident expansion is reduced, and the use safety of the electric heater is improved.

Description

Technical Field

[0001] The invention relates to the technical field of electric heaters, in particular to a safety switch for an electric heater and an electric heater. Background Art

[0002] Electric heaters use electricity as their main energy source and use resistance heating, induction heating, arc heating, electron beam heating, infrared heating and dielectric heating to heat the human body through direct contact, warm air convection, far-infrared radiation and other means.

[0003] The electric heater safety switch is a safety protection device used during the use of the electric heater. When the electric heater operates abnormally, the safety switch can automatically disconnect the electrical connection and quickly stop the operation of the electric heater to avoid causing greater failures. The existing electric heater safety switch can only stop the operation of the electric heater, and cannot prevent the spread of accidents when failures and accidents occur in the electric heater. Summary of the invention

[0004] The technical problem of the present invention is to provide a safety switch for an electric heater and an electric heater, so that when the safety switch stops the operation of the electric heater, the possibility of a fire in the electric heater can be curbed, the possibility of the accident expanding can be reduced, and the safety of the use of the electric heater can be increased.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a safety switch for an electric heater, comprising a mounting shell, a main connector is fixedly mounted at one end of the mounting shell, a secondary connector is arranged at a position symmetrical to the main connector in the mounting shell, a plurality of connection ends are slidably connected in the secondary connector, a connecting plate is fixedly mounted between the connection ends, an end of the connection end close to the main connector is fitted with the main connector, a plurality of main heating tubes are fixedly mounted on the main connector, a plurality of secondary heating tubes are fixedly mounted on the secondary connector, and the secondary heating tubes are connected to the main heating tubes. The device is a parallel device for heating tubes, wherein an upper mounting cover is fixedly mounted on the upper end of the mounting shell, and ventilation slots are arranged on the lower end and the upper mounting cover of the mounting shell, an upper movable plug is slidably arranged at the ventilation slot at the upper end, and a lower movable plug is slidably arranged at the ventilation slot at the lower end, and a transmission assembly is arranged between the upper movable plug, the lower movable plug and the connecting plate, and the transmission assembly can drive the connecting end to disconnect from the main connector and drive the upper movable plug and the lower movable plug to be introduced into the ventilation slot at the same time, and a partition is fixedly mounted between the main connector and the secondary connector, and a temperature sensor is arranged on the side of the partition away from the main heating tube; Furthermore, the transmission assembly includes an extension shaft and a tooth plate, the extension shaft is provided with two groups and both are rotatably mounted on one end of the mounting shell close to the partition, one end of the extension shaft extends into the mounting shell and is fixedly mounted with an internal gear, the tooth plate is fixedly mounted on one side of the connecting plate close to the extension shaft, the tooth plate is provided with two groups and is respectively arranged at the upper and lower ends of the connecting plate, the internal gear is meshed with the tooth plate, and an external transmission member is provided between the extension shaft and one end of the mounting shell.

[0006] Furthermore, an upper gear is fixedly mounted on the extension shaft at the upper end, a fixed shaft is rotatably mounted on one side of the mounting shell corresponding to the upper gear, a side gear is fixedly mounted on the fixed shaft, the side gear is meshed with the upper gear, an upper transmission rod is rotatably mounted on one end of the upper mounting cover close to the side gear, a small guide wheel is fixedly mounted on the upper transmission rod, a large guide wheel is fixedly mounted on the side gear, and a limiting band is engaged with the outer shell of the large guide wheel.

[0007] Furthermore, an upper threaded rod is rotatably mounted on the upper mounting cover, the lower end of the upper threaded rod extends into the mounting shell and is threadedly connected to an upper movable plug, an upper active bevel gear is fixedly mounted on the end of the upper transmission rod away from the small guide wheel, an upper driven bevel gear is fixedly mounted on the end of the upper threaded rod close to the upper transmission rod, the upper active bevel gear is meshed with the upper driven bevel gear, upper ends of the upper threaded rods on both sides are fixedly mounted with upper transmission wheels, and an upper transmission belt is connected to the outer sleeve of the upper transmission wheel.

[0008] Furthermore, a plurality of mounting shafts are rotatably mounted on the upper mounting cover, the lower ends of the mounting shafts extend into the mounting shell and are located below the upper movable plug, a ventilation fan is fixed to the lower ends of the mounting shafts, transmission gears are fixedly mounted on the upper ends of the mounting shafts, a transmission chain is connected to the transmission gear outer sleeve, a rotating motor is fixedly mounted on one side of the mounting shafts, a driven gear is fixedly mounted on the upper end of the mounting shafts close to one end of the upper transmission rod, a driving gear is fixedly mounted on the upper threaded rod close to the side of the driven gear, a telescopic rod is fixedly mounted on the upper mounting cover at a position corresponding to the position between the driving gear and the driven gear, a transition gear is rotatably mounted on the upper end of the telescopic rod, and the transition gear can mesh with the driving gear and the driven gear.

[0009] Furthermore, a lower gear is fixedly installed on the extension shaft at the lower end, and a limiting shaft is rotatably installed on one side of the mounting shell corresponding to the lower gear, and a positioning gear is fixedly installed on the limiting shaft, and the positioning gear is meshed with the lower gear. One end of the limiting shaft passes through the partition and extends between the main heating tube and the secondary heating tube and a lower active bevel gear is fixedly installed. A two-way screw is rotatably installed on the lower end of the mounting shell, and a side transmission member is provided at one end of the two-way screw on the same side. An intermediate shaft is rotatably installed between the two-way screws in the mounting shell corresponding to the two-way screws, and a lower transmission member is provided between the intermediate shafts, and a lower driven bevel gear is fixedly installed on the intermediate shaft at one end close to the partition, and the lower driven bevel gear is meshed with the lower active bevel gear, and lower movable plugs are threadedly connected to both ends of the two-way screw.

[0010] An electric heater includes a main connector, a plug-in slot is provided on the main connector at a position corresponding to the connection end, the connection end is electrically connected to the plug-in slot, the partition cooperates with the main connector and the secondary connector to divide the installation shell into two spaces, and the main heating tube and the secondary heating tube are isolated from the connection end.

[0011] Furthermore, a plurality of heat dissipation plates are fixedly mounted on both sides of the mounting shell, and a protective cover is provided on the upper end of the upper mounting cover and one side of the mounting shell, and the protective cover covers the transmission equipment such as the upper threaded rod, the extension shaft and the mounting shaft inside.

[0012] The beneficial effects of the present invention are: When the temperature inside the electric heater of the present invention is abnormal, the transmission component drives the connecting end to be withdrawn from the main connector, thereby disconnecting the connection between the main connector and the secondary connector, and further disconnecting the connecting path between the main heating tube and the secondary heating tube, thereby quickly stopping the operation of the electric heater. At the same time of disconnection, the lower movable plug and the upper movable plug are driven to move toward the ventilation groove, thereby causing the lower movable plug and the upper movable plug to abut against the inside of the ventilation groove, and the installation shell is sealed by the upper movable plug and the lower movable plug to isolate external oxygen from entering the installation shell, so that the combustion equipment inside the installation shell stops burning due to lack of oxygen, thereby preventing subsequent larger combustion accidents, and increasing combustion protection while disconnecting the operation of the electric heater to prevent the spread of fire.

[0013] When the electric heater of the present invention is working, the rotating motor drives the installation shaft at one end to rotate, and the rotation of the installation shaft drives multiple groups of installation shafts to rotate simultaneously through the transmission gear and the transmission chain, and the rotation of the installation shaft drives multiple groups of ventilation fans to rotate, and the rotation of the ventilation fans assists the electric heater to ventilate. When the electric heater safety switch is enabled, the power supply of the rotating motor is disconnected, and the telescopic rod moves up at this time, driving the transition gear to move up, so that the transition gear is meshed with the driving gear and the driven gear. At this time, the upper threaded rod rotates to drive the driving gear to rotate, and the driving gear rotates to drive the transition gear to rotate, and the transition gear rotates to drive the driven gear to rotate, and the driven gear drives the installation shaft to rotate, so that the ventilation fan can still operate after the power of the electric heater is disconnected, and quickly discharges the air in the electric heater to the outside of the installation shell, so that after the connection end is disconnected from the main connector, the oxygen in the installation shell can be quickly discharged, thereby quickly suppressing the combustion of the ignition point of the electric heater, reducing the possibility of spontaneous combustion in the electric heater, isolating the spread of the fire of the electric heater, and increasing the safety of the electric heater. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 For the present invention Figure 1 A partial schematic diagram of the structure at A in the middle; Figure 3 For the present invention Figure 1 A partial schematic diagram of the structure at B in the middle; Figure 4 For the present invention Figure 1 A partial schematic diagram of the structure at C in the middle; Figure 5 This is a schematic diagram of the side view structure of the present invention; Figure 6 For the present invention Figure 5 A partial schematic diagram of the structure at D in the middle; Figure 7 The internal structure of the present invention is shown in FIG. Figure 1 ; Figure 8 For the present invention Figure 7 A partial schematic diagram of the structure at E in the middle; Fig. 9 The internal structure of the present invention is shown in FIG. Figure 2 ; Fig.10 For the present invention Fig. 9 Partial schematic diagram of the structure at F in the middle; Fig.11 The internal structure of the present invention is shown in FIG. Figure 3 ; Fig.12 For the present invention Fig.11 Partial schematic diagram of the structure at the total G.

[0016] In the accompanying drawings, the components represented by the reference numerals are listed as follows: 1. Installation shell; 2. Heat sink; 3. Lower movable plug; 4. Upper movable plug; 5. Upper transmission belt; 6. Upper installation cover; 7. Upper transmission rod; 8. Upper active bevel gear; 9. Upper driven bevel gear; 10. Upper threaded rod; 11. Upper transmission wheel; 12. Telescopic rod; 13. Installation shaft; 14. Transmission gear; 15. Transmission chain; 16. Driven gear; 17. Transition gear; 18. Limiting belt; 19. Small guide wheel; 20. Rotating motor; 21. External transmission member; 22. Large guide wheel; 23. Side gear; 2 4. Upper gear; 25. Fixed shaft; 26. Extension shaft; 27. Tooth plate; 28. Connection end; 29. ​​Lower gear; 30. Positioning gear; 31. Limiting shaft; 32. Main heating tube; 33. Secondary heating tube; 34. Main connector; 35. Secondary connector; 36. Connecting plate; 37. Internal gear; 38. Partition; 39. Lower transmission member; 40. Ventilation fan; 41. Bidirectional screw; 42. Intermediate shaft; 43. Lower driving bevel gear; 44. Lower driven bevel gear; 45. Side transmission member; 46. Driving gear. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] See also Figure 1-Figure 12The present invention provides a technical solution: a safety switch for an electric heater, comprising a mounting shell 1, a main connector 34 is fixedly mounted at one end of the mounting shell 1, a secondary connector 35 is arranged at a position symmetrical to the main connector 34 in the mounting shell 1, a plurality of connection ends 28 are slidably connected in the secondary connector 35, a connection plate 36 is fixedly mounted between the connection ends 28, one end of the connection end 28 close to the main connector 34 is matched with the main connector 34, a plurality of main heating tubes 32 are fixedly mounted on the main connector 34, a plurality of secondary heating tubes 33 are fixedly mounted on the secondary connector 35, and the secondary heating tubes 33 are parallel to the main heating tubes 32. The equipment is arranged, an upper mounting cover 6 is fixedly mounted on the upper end of the mounting shell 1, ventilation grooves are arranged on the lower end of the mounting shell 1 and the upper mounting cover 6, an upper movable plug 4 is slidably mounted at the upper ventilation groove, and a lower movable plug 3 is slidably mounted at the lower ventilation groove, a transmission component is arranged between the upper movable plug 4, the lower movable plug 3 and the connecting plate 36, the transmission component can drive the connecting end 28 to disconnect from the main connector 34 and drive the upper movable plug 4 and the lower movable plug 3 to be introduced into the ventilation groove, a partition 38 is fixedly mounted between the main connector 34 and the secondary connector 35, and a temperature sensor is arranged on the side of the partition 38 away from the main heating tube 32.

[0019] When the electric heater is transported, one end of the connection end 28 is embedded in the main connector 34, so that the main connector 34 and the secondary connector 35 are electrically connected through the connection end 28, so that the main heating tube 32 and the secondary heating tube 33 on the main connector 34 and the secondary connector 35 are connected, so that the circuit of the heating device of the electric heater is connected, so that the main heating tube 32 and the secondary heating tube 33 are heated and the function of the electric heater is realized. When the temperature in the electric heater is abnormal, the transmission component drives the connection end 28 to be withdrawn from the main connector 34, so as to disconnect the connection between the main connector 34 and the secondary connector 35. , and then disconnect the connection path between the main heating tube 32 and the secondary heating tube 33, so as to quickly stop the operation of the electric heater. At the same time, the lower movable plug 3 and the upper movable plug 4 are driven to move toward the ventilation slot, so that the lower movable plug 3 and the upper movable plug 4 are pressed against the inside of the ventilation slot, and the installation shell 1 is sealed by the upper movable plug 4 and the lower movable plug 3 to isolate external oxygen from entering the installation shell 1, so that the combustion equipment inside the installation shell 1 stops burning due to lack of oxygen, thereby preventing subsequent larger combustion accidents, and increasing combustion protection while disconnecting the operation of the electric heater to avoid the spread of fire.

[0020] When the temperature inside the electric heater of the present invention is abnormal, the transmission component drives the connecting end 28 to be withdrawn from the main connector 34, thereby disconnecting the connection between the main connector 34 and the secondary connector 35, and then disconnecting the connection path between the main heating tube 32 and the secondary heating tube 33, thereby quickly stopping the operation of the electric heater. At the same time, the lower movable plug 3 and the upper movable plug 4 are driven to move toward the ventilation groove, thereby causing the lower movable plug 3 and the upper movable plug 4 to contact the inside of the ventilation groove, and the installation shell 1 is sealed by the upper movable plug 4 and the lower movable plug 3 to isolate external oxygen from entering the installation shell 1, so that the combustion equipment inside the installation shell 1 stops burning due to lack of oxygen, thereby preventing subsequent larger combustion accidents, and while disconnecting the operation of the electric heater, increasing combustion protection to prevent the spread of fire.

[0021] As a further solution of the present invention, the transmission assembly includes an extension shaft 26 and a tooth plate 27. The extension shaft 26 is provided with two groups and is rotatably mounted on one end of the mounting shell 1 close to the partition 38. One end of the extension shaft 26 extends into the mounting shell 1 and is fixedly mounted with an internal gear 37. The tooth plate 27 is fixedly mounted on one side of the connecting plate 36 close to the extension shaft 26. The tooth plate 27 is provided with two groups and is respectively arranged at the upper and lower ends of the connecting plate 36. The internal gear 37 is meshed with the tooth plate 27. An external transmission member 21 is provided between the extension shaft 26 and one end of the mounting shell 1.

[0022] A driving motor is provided on one side of the upper extension shaft 26, and the driving motor drives the extension shaft 26 to rotate. The rotation of the extension shaft 26 drives the upper and lower extension shafts 26 to rotate simultaneously through the action of the external transmission member 21. The rotation of the extension shaft 26 drives the internal gear 37 to rotate, and the rotation of the internal gear 37 interacts with the tooth plate 27, thereby driving the tooth plate 27 to slide toward the secondary connector 35. The tooth plate 27 drives the connecting end 28 to move toward the secondary connector 35 through the connecting plate 36, thereby pulling the connecting end 28 out of the main connector 34, disconnecting the connection between the main heating tube 32 and the secondary heating tube 33, and stopping the operation of the electric heater.

[0023] As a further solution of the present invention, an upper gear 24 is fixedly installed on the upper extension shaft 26, a fixed shaft 25 is rotatably installed on the side of the mounting shell 1 corresponding to the upper gear 24, a side gear 23 is fixedly installed on the fixed shaft 25, the side gear 23 is meshed with the upper gear 24, an upper transmission rod 7 is rotatably installed on one end of the upper mounting cover 6 close to the side gear 23, a small guide wheel 19 is fixedly installed on the upper transmission rod 7, a large guide wheel 22 is fixedly installed on the side gear 23, and a limiting belt 18 is engaged with the outer shell of the large guide wheel 22 and the small guide wheel 19.

[0024] The rotation of the upper extension shaft 26 drives the upper gear 24 to rotate, the rotation of the upper gear 24 drives the side gear 23 meshing therewith to rotate, the rotation of the side gear 23 drives the large guide wheel 22 to rotate, the rotation of the large guide wheel 22 drives the small guide wheel 19 to rotate through the limiting belt 18, the rotation of the small guide wheel 19 drives the upper transmission rod 7 to rotate, the rotation of the upper transmission rod 7 drives the upper active bevel gear 8 to rotate, the rotation of the upper active bevel gear 8 drives the upper driven bevel gear 9 to rotate, the rotation of the upper driven bevel gear 9 drives the upper threaded rod 10 on one side to rotate, the rotation of the upper threaded rod 10 on one side drives the upper threaded rods 10 on both sides to rotate simultaneously through the upper transmission wheel 11 and the upper transmission belt 5, the rotation of the upper threaded rod 10 interacts with the upper movable plug 4, thereby driving the upper movable plug 4 to move upward, so that the upper movable plug 4 is embedded in the upper ventilation groove, and the upper end of the installation shell 1 is sealed.

[0025] As a further solution of the present invention, an upper threaded rod 10 is rotatably mounted on the upper mounting cover 6, the lower end of the upper threaded rod 10 extends into the mounting housing 1 and is threadedly connected to an upper movable plug 4, an upper driving bevel gear 8 is fixedly mounted on the end of the upper transmission rod 7 away from the small guide wheel 19, an upper driven bevel gear 9 is fixedly mounted on the end of the upper threaded rod 10 close to the upper transmission rod 7, the upper driving bevel gear 8 is meshed with the upper driven bevel gear 9, and upper transmission wheels 11 are fixedly mounted on the upper ends of the upper threaded rods 10 on both sides, and an upper transmission belt 5 is connected to the outer sleeve of the upper transmission wheel 11.

[0026] As a further solution of the present invention, a plurality of mounting shafts 13 are rotatably mounted on the upper mounting cover 6, the lower ends of the mounting shafts 13 extend into the mounting housing 1 and are located below the upper movable plug 4, a ventilation fan 40 is fixed to the lower end of the mounting shaft 13, a transmission gear 14 is fixedly mounted on the upper end of the mounting shaft 13, a transmission chain 15 is connected to the outer sleeve of the transmission gear 14, a rotating motor 20 is fixedly mounted on one side of the mounting shaft 13, a driven gear 16 is fixedly mounted on the upper end of the mounting shaft 13 close to the upper transmission rod 7, a driving gear 46 is fixedly mounted on the upper threaded rod 10 close to the side of the driven gear 16, a telescopic rod 12 is fixedly mounted at a position corresponding to the position between the driving gear 46 and the driven gear 16 on the upper mounting cover 6, a transition gear 17 is rotatably mounted on the upper end of the telescopic rod 12, and the transition gear 17 can mesh with the driving gear 46 and the driven gear 16.

[0027] When the electric heater is operating normally, the lower movable plug 3 and the upper movable plug 4 are both away from the ventilation slot, and the external air can enter and exit the installation housing 1 through the ventilation slot. When the electric heater is working, the rotating motor 20 drives the installation shaft 13 at one end to rotate, and the rotation of the installation shaft 13 drives multiple groups of installation shafts 13 to rotate simultaneously through the transmission gear 14 and the transmission chain 15. The rotation of the installation shaft 13 drives multiple groups of ventilation fans 40 to rotate, and the rotation of the ventilation fans 40 assists the electric heater to ventilate. When the safety switch of the electric heater is enabled, the power supply of the rotating motor 20 is disconnected, and at this time the telescopic rod 12 moves up, driving the transition gear 17 to move up, so that the transition gear 17 is aligned with the driving gear 46 and the driven gear 16 The upper threaded rod 10 is engaged, and the rotation of the upper threaded rod 10 drives the driving gear 46 to rotate, and the rotation of the driving gear 46 drives the transition gear 17 to rotate, and the rotation of the transition gear 17 drives the driven gear 16 to rotate, and the driven gear 16 drives the installation shaft 13 to rotate, so that the ventilation fan 40 can still operate after the power of the electric heater is disconnected, and quickly discharge the air in the electric heater to the outside of the installation shell 1, so that after the connection end 28 is disconnected from the main connector 34, the oxygen in the installation shell 1 can be quickly discharged, thereby quickly suppressing the combustion of the ignition point of the electric heater, reducing the possibility of spontaneous combustion in the electric heater, isolating the spread of the fire in the electric heater, and increasing the safety of the electric heater.

[0028] When the electric heater of the present invention is working, the rotating motor 20 drives the installation shaft 13 at one end to rotate, and the installation shaft 13 rotates through the transmission gear 14 and the transmission chain 15 to drive multiple groups of installation shafts 13 to rotate simultaneously, and the rotation of the installation shaft 13 drives multiple groups of ventilation fans 40 to rotate, and the rotation of the ventilation fans 40 assists the electric heater to ventilate. When the electric heater safety switch is enabled, the power supply of the rotating motor 20 is disconnected, and at this time the telescopic rod 12 moves up, driving the transition gear 17 to move up, so that the transition gear 17 is meshed with the driving gear 46 and the driven gear 16, and at this time the upper threaded rod 10 rotates to drive the driving gear 4 6 rotates, the driving gear 46 rotates to drive the transition gear 17 to rotate, the transition gear 17 rotates to drive the driven gear 16 to rotate, and the driven gear 16 drives the installation shaft 13 to rotate, so that the ventilation fan 40 can still operate after the power of the electric heater is disconnected, and quickly discharge the air in the electric heater to the outside of the installation shell 1, so that after the connection end 28 is disconnected from the main connector 34, the oxygen in the installation shell 1 can be quickly discharged, thereby quickly suppressing the combustion of the ignition point of the electric heater, reducing the possibility of spontaneous combustion in the electric heater, isolating the spread of the fire of the electric heater, and increasing the safety of the electric heater.

[0029] As a further solution of the present invention, a lower gear 29 is fixedly installed on the lower end extension shaft 26, and a limiting shaft 31 is rotatably installed on one side of the mounting shell 1 corresponding to the lower gear 29, and a positioning gear 30 is fixedly installed on the limiting shaft 31, and the positioning gear 30 is meshed with the lower gear 29. One end of the limiting shaft 31 passes through the partition 38 and extends between the main heating tube 32 and the secondary heating tube 33 and is fixedly installed with a lower active bevel gear 43. A bidirectional screw 41 is rotatably installed on the lower end of the mounting shell 1, and a side transmission member 45 is provided at one end of the bidirectional screw 41 on the same side. An intermediate shaft 42 is rotatably installed between the corresponding bidirectional screws 41 in the mounting shell 1, and a lower transmission member 39 is provided between the intermediate shafts 42. A lower driven bevel gear 44 is fixedly installed on the intermediate shaft 42 at one end close to the partition 38, and the lower driven bevel gear 44 is meshed with the lower active bevel gear 43. Both ends of the bidirectional screw 41 are threadedly connected with a lower movable plug 3.

[0030] The lower extension shaft 26 rotates to drive the lower gear 29 to rotate, the lower gear 29 rotates to drive the positioning gear 30 to rotate, the positioning gear 30 rotates to drive the limit shaft 31 to rotate, the limit shaft 31 rotates to drive the lower active bevel gear 43 to rotate, the lower active bevel gear 43 rotates to drive the lower driven bevel gear 44 to rotate, the lower driven bevel gear 44 rotates to drive the intermediate shaft 42 to rotate, the intermediate shaft 42 rotates to drive the intermediate shafts 42 on both sides to rotate simultaneously through the lower transmission member 39, the rotation of the intermediate shaft 42 and the side transmission member 45 drive the bidirectional screw 41 to rotate, and the rotation of the bidirectional screw 41 drives the lower movable plug 3 to move toward the ventilation slot.

[0031] An electric heater includes a main connector 34, a plug-in slot is provided on the main connector 34 at a position corresponding to a connection end 28, the connection end 28 is electrically connected to the plug-in slot, a partition 38 cooperates with the main connector 34 and the secondary connector 35, divides the installation shell 1 into two spaces, and isolates the main heating tube 32 and the secondary heating tube 33 from the connection end 28.

[0032] As a further solution of the present invention, multiple heat dissipation plates 2 are fixedly installed on both sides of the mounting shell 1, and protective covers are provided on the upper end of the upper mounting cover 6 and one side of the mounting shell 1, which cover the transmission equipment such as the upper threaded rod 10, the extension shaft 26 and the mounting shaft 13 inside.

[0033] The embodiments of the safety switch for electric heater and the electric heater of the present invention described above are only examples, and a person skilled in the art of the present invention may make various modifications or derive other equivalent embodiments. Therefore, the present invention is not limited to the embodiments mentioned in the above detailed description. Therefore, the true technical protection scope of the present invention should be determined according to the technical concept of the attached invention claims. Furthermore, it should be understood that the present invention includes the concept of the present invention defined by the attached invention claims and all variant technical solutions, equivalent technical solutions and alternative technical solutions within its scope.

Claims

1. A safety switch for an electric heater, comprising a mounting housing (1), characterized in that: A main connector (34) is fixedly mounted at one end of the installation shell (1); a secondary connector (35) is arranged in a position symmetrical to the main connector (34) in the installation shell (1); a plurality of connection ends (28) are slidably connected in the secondary connector (35); a connection plate (36) is fixedly mounted between the connection ends (28); an end of the connection end (28) close to the main connector (34) is engaged with the main connector (34); a plurality of main heating tubes (32) are fixedly mounted on the main connector (34); a plurality of secondary heating tubes (33) are fixedly mounted on the secondary connector (35); the secondary heating tubes (33) are arranged in parallel with the main heating tubes (32); and the installation shell (1) An upper mounting cover (6) is fixedly mounted on the upper end of the mounting shell (1), ventilation slots are arranged on the lower end of the mounting shell (1) and the upper mounting cover (6), an upper movable plug (4) is slidably mounted on the ventilation slot at the upper end, and a lower movable plug (3) is slidably mounted on the ventilation slot at the lower end, a transmission assembly is arranged between the upper movable plug (4), the lower movable plug (3) and the connecting plate (36), the transmission assembly can drive the connecting end (28) to disconnect from the main connector (34) and drive the upper movable plug (4) and the lower movable plug (3) to be introduced into the ventilation slot, a partition (38) is fixedly mounted between the main connector (34) and the secondary connector (35), and a temperature sensor is arranged on the side of the partition (38) away from the main heating tube (32).

2. The safety switch for electric heater according to claim 1, characterized in that: The transmission assembly comprises an extension shaft (26) and a toothed plate (27); the extension shaft (26) is provided with two groups and both are rotatably mounted on one end of the mounting housing (1) close to the partition plate (38); one end of the extension shaft (26) extends into the mounting housing (1) and is fixedly mounted with an internal gear (37); the toothed plate (27) is fixedly mounted on one side of the connecting plate (36) close to the extension shaft (26); the toothed plate (27) is provided with two groups and is respectively arranged at the upper and lower ends of the connecting plate (36); the internal gear (37) is meshed with the toothed plate (27); and an external transmission member (21) is provided between the extension shaft (26) and one end of the mounting housing (1).

3. The safety switch for electric heater according to claim 2, characterized in that: An upper gear (24) is fixedly mounted on the extension shaft (26) at the upper end; a fixed shaft (25) is rotatably mounted on a side of the mounting housing (1) corresponding to the upper gear (24); a side gear (23) is fixedly mounted on the fixed shaft (25); the side gear (23) is meshed with the upper gear (24); an upper transmission rod (7) is rotatably mounted on one end of the upper mounting cover (6) close to the side gear (23); a small guide wheel (19) is fixedly mounted on the upper transmission rod (7); a large guide wheel (22) is fixedly mounted on the side gear (23); and a limiting belt (18) is engaged with the outer surface of the large guide wheel (22) and the small guide wheel (19).

4. The safety switch for electric heater according to claim 3, characterized in that: An upper threaded rod (10) is rotatably mounted on the upper mounting cover (6), the lower end of the upper threaded rod (10) extends into the mounting housing (1) and is threadedly connected to an upper movable plug (4), an upper driving bevel gear (8) is fixedly mounted on the end of the upper transmission rod (7) away from the small guide wheel (19), an upper driven bevel gear (9) is fixedly mounted on the end of the upper threaded rod (10) close to the upper transmission rod (7), the upper driving bevel gear (8) meshes with the upper driven bevel gear (9), upper ends of the upper threaded rods (10) on both sides are fixedly mounted with upper transmission wheels (11), and an upper transmission belt (5) is connected to the outer sleeve of the upper transmission wheel (11).

5. The safety switch for electric heater according to claim 4, characterized in that: The upper mounting cover (6) is rotatably mounted with a plurality of mounting shafts (13), the lower ends of the mounting shafts (13) extending into the mounting housing (1) and being located below the upper movable plug (4), the lower ends of the mounting shafts (13) being fixed with ventilation fans (40), the upper ends of the mounting shafts (13) being fixed with transmission gears (14), the outer shells of the transmission gears (14) being connected with transmission chains (15), and one side of the mounting shafts (13) being fixed with a rotating motor (20), the lower ends of the mounting shafts (13) being close to the upper transmission rod (7) A driven gear (16) is fixedly mounted on the upper end of the mounting shaft (13) at one end, a driving gear (46) is fixedly mounted on the upper threaded rod (10) on the side close to the driven gear (16), a telescopic rod (12) is fixedly mounted on the upper mounting cover (6) at a position corresponding to between the driving gear (46) and the driven gear (16), a transition gear (17) is rotatably mounted on the upper end of the telescopic rod (12), and the transition gear (17) is capable of meshing with the driving gear (46) and the driven gear (16).

6. The safety switch for electric heater according to claim 5, characterized in that: A lower gear (29) is fixedly mounted on the extension shaft (26) at the lower end; a limit shaft (31) is rotatably mounted on one side of the mounting housing (1) corresponding to the lower gear (29); a positioning gear (30) is fixedly mounted on the limit shaft (31); the positioning gear (30) is meshed with the lower gear (29); one end of the limit shaft (31) passes through the partition (38) and extends between the main heating tube (32) and the secondary heating tube (33) and is fixedly mounted with a lower active bevel gear (43); a double-ended gear (43) is rotatably mounted on the lower end of the mounting housing (1); A side transmission member (45) is provided at one end of the bidirectional screw (41) on the same side; an intermediate shaft (42) is rotatably installed between the corresponding bidirectional screws (41) in the mounting housing (1); a lower transmission member (39) is provided between the intermediate shafts (42); a lower driven bevel gear (44) is fixedly installed on the intermediate shaft (42) at one end close to the partition (38); the lower driven bevel gear (44) is meshed with the lower active bevel gear (43); and lower movable plugs (3) are threadedly connected to both ends of the bidirectional screw (41).

7. An electric heater, comprising the safety switch for the electric heater according to any one of claims 1 to 6, characterized in that: The device further comprises a main connector (34), wherein a plug-in slot is provided on the main connector (34) at a position corresponding to the connection end (28), the connection end (28) being electrically connected to the plug-in slot, and the partition plate (38) cooperates with the main connector (34) and the secondary connector (35) to divide the installation housing (1) into two spaces, thereby isolating the main heating tube (32) and the secondary heating tube (33) from the connection end (28).

8. The electric heater according to claim 7, characterized in that: A plurality of heat dissipation plates (2) are fixedly mounted on both sides of the mounting shell (1), and a protective cover is provided on the upper end of the upper mounting cover (6) and one side of the mounting shell (1), wherein the protective cover covers transmission equipment such as the upper threaded rod (10), the extension shaft (26) and the mounting shaft (13) inside the protective cover.

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