Anti-scald heating apparatus for a heating recirculation fan

Abstract

This invention relates to the field of fluid heater technology, and more particularly to an anti-scalding heating device for a heating circulating fan. The device includes a base, a fan module, a shell, a heating element, a positioning heat-conducting element, a protective isolation module, a controllable flow section, a water pumping section, and a control box. The fan module is mounted on the upper side of the base block, and the shell is mounted on the right side of the fan module. The shell includes a heat-insulating shell fixed to the upper side of the base. In this invention, the positioning heat-conducting element, protective isolation module, pipe arrangement, pressure relief valve, and whistle provide multiple protections against overheating, including isolation, warning, and cooling, independent of thermocouple overheat detection protection measures. When the equipment overheats, it can rapidly cool down, protecting the heating element and isolating personnel from the equipment to reduce the risk of burns. It also warns workers to allow for manual handling.

Description

Technical Field

[0001] This invention relates to the field of fluid heater technology, specifically to an anti-scalding heating device for a heating circulating fan. Background Technology

[0002] The heating equipment in a heated circulating fan usually refers to a duct heater. A duct heater is a device specifically designed to heat air. It transfers heat to the air flowing through the duct through electric heating elements or other heating methods, raising the air temperature. In a heated circulating fan system, the duct heater plays a key role, providing the necessary heat to the air delivered by the fan, thereby meeting the heating requirements of a specific space or process.

[0003] In existing duct heaters, to prevent heat transfer to the outer shell and burns to workers, an insulating layer is usually filled inside the shell to reduce heat transfer and provide insulation. However, in actual use, if the operator starts the duct heater first, and the circulating fan fails to start simultaneously due to operational errors or equipment malfunctions, there will be no airflow within the duct heater. Since the electric heating elements inside the duct heater are usually tightly packed to improve heating efficiency, the heat generated by each element cannot be dissipated in time, causing a rapid temperature rise between the elements and heat accumulation. This not only damages the heating elements but also affects their lifespan. Even if the duct heater is stopped in time under overheat detection by a thermocouple, the accumulated heat remains. This heat accumulation may exceed the heat resistance limit of the insulating layer, reducing the insulation effect and causing the outer shell surface to heat up rapidly, increasing the risk of burns to workers. Therefore, to address these problems, an anti-scalding heating device for the circulating fan is proposed. Summary of the Invention

[0004] The purpose of this invention is to provide an anti-scalding heating device for a heating circulating fan, in order to solve the problem that when the heating device of the existing heating circulating fan overheats, the heat insulation performance of the shell may fail or be greatly reduced, thereby causing the surface of the shell to heat up rapidly and increasing the risk of burns to workers.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A scalding-proof heating device for a circulating heating fan includes a base, a fan module, a shell, a heating section, a positioning heat-conducting section, a protective isolation module, a controllable flow section, a water pumping section, and a control box. The fan module is mounted on the upper side of the base block. The shell is mounted on the right side of the fan module. The shell includes a heat-insulating shell fixed to the upper side of the base. An opening is provided on the upper side of the heat-insulating shell. A pair of through holes are provided on both the front and rear sides of the heat-insulating shell. A second through hole is provided on the front side of the heat-insulating shell to the right of the first through hole. A positioning heat-conducting section is installed inside the shell. The heat-conducting part includes a heat-conducting frame shell fixedly connected to the inner wall of the heat-insulating shell. The inner side of the heat-conducting frame shell has several positioning grids arranged at equal intervals. The inner side of the heat-conducting frame shell has a liquid cavity with an upward opening. A float plate is slidably connected to the inner side of the liquid cavity. The lower end face of the heat-conducting frame shell has a pair of interfaces one communicating with the liquid cavity on both the front and rear sides. The lower end face of the heat-conducting frame shell has an interface two communicating with the liquid cavity on the right side. Protective isolation modules are installed on both the front and rear sides of the positioning heat-conducting part. A control box located in front of the fan module is fixedly connected to the upper side of the base.

[0007] Preferably, the protective isolation module includes a pair of transmission pipes connected to interface one. The other end of each transmission pipe passes through a perforation one and is fitted with a transmission unfolding part. The transmission unfolding part includes a seat sleeve connected to the transmission pipe. The upper and lower sides of the seat sleeve are fixedly connected to conduits. A guide channel is opened on the side of the conduits away from the shell. The upper and lower sides of the seat sleeve are fixedly connected to elastic folding airbags located inside the conduits. The side of the elastic folding airbags away from the seat sleeve is fixedly connected to a guide plate that is slidably connected to the guide channel. The side of the guide plate away from the elastic folding airbags is fixedly connected to a spring two located inside the conduits. A middle connecting plate is fixedly connected between the left and right seat sleeves. The upper and lower sides of the middle connecting plate are provided with symmetrically arranged linkage folding plates. The side of the linkage folding plates near the shell is fixedly connected to the protruding end of the guide plate. The upper and lower sides of the middle connecting plate are fixedly connected to folded curtains. The end of the curtains away from the middle connecting plate is fixedly connected to the channel of the linkage folding plate.

[0008] Preferably, a controllable flow section is installed on the lower side of the positioning heat-conducting part. The controllable flow section includes a through pipe fixed inside the second perforation. The upper rear end of the through pipe is connected to the second interface. A rail housing located on the front side of the shell is fixedly connected to the through pipe. A valve plate is slidably connected to the inner side of the rail housing. A one-way valve aligned with the riser of the through pipe is installed in the right opening of the valve plate. A water passage hole located to the left of the one-way valve is opened on the inner side of the valve plate. A liquid filling valve pipe located above the one-way valve is connected to the right side of the through pipe. A drain pipe located above the liquid filling valve pipe is connected to the right side of the through pipe. A pressure relief valve is installed on the riser of the drain pipe. A whistle is connected to the upper end of the drain pipe.

[0009] Preferably, a heating element is installed at the shell portion. The heating element includes a heat insulation plate located inside the inlet, and the heat insulation plate is detachably connected to the heat insulation shell by bolts. A plurality of heating tubes arranged at equal intervals are fixedly connected to the lower side of the heat insulation plate, and the heating tubes are all located inside the heat insulation shell. A plurality of support tubes are fixedly connected to the upper side of the heat insulation plate, and a junction box is fixedly connected to the upper side of the support tubes. A thermocouple is installed inside the junction box, and the detection end of the thermocouple passes through the heat insulation plate and is inserted into the inner side of the heat insulation shell.

[0010] Preferably, the heat insulation shell consists of an outer shell and an inner heat insulation interlayer. The support tubes are all arranged at equal intervals, and each support tube corresponds to a lower heating tube. The heating tubes are all located inside the positioning grid, and the fins of the heating tubes are all in contact with the inner wall of the positioning grid. The positioning heat-conducting part is located in the middle area of ​​the heating tube. The outer end face of the float plate is in close contact with the inner wall of the liquid cavity. The protective isolation modules are all located on the front and rear sides of the shell and the front and rear sides of the heating part. The height of the curtain after unfolding is 0.5 times the height of the shell. The length of the curtain is the same as the length of the middle shell of the heat insulation shell. The folds of the curtain are all pre-pressed with creases.

[0011] Preferably, the outer end face of the valve plate is in contact with the inner wall of the rail housing, the one-way valve is configured for one-way flow from bottom to top, the liquid filling valve pipe is composed of a pipe body and a regulating valve, and the upper end of the drain pipe and the whistle are both set higher than the heating part.

[0012] Preferably, a water pumping unit is installed on the front side of the shell. The water pumping unit includes a storage tank fixedly connected to the front end face of the insulation shell, and the storage tank is connected to the lower left end of the through pipe. A piston rod is slidably connected to the left circular opening of the storage tank. A piston plate located inside the storage tank is fixedly connected to the right end of the piston rod. A spring three is sleeved on the outer side of the piston rod. The fan module includes a volute, a motor, a fan wheel, a drive mechanism one, and a drive mechanism two. The volute includes a wheel housing disposed on the upper side of the seat block. An air inlet is opened on the front side of the wheel housing. An exhaust pipe is fixedly connected to the right side of the wheel housing, and the exhaust pipe is detachably connected to the insulation shell by bolts. An expansion cavity is opened on the lower side of the exhaust pipe, and a track is opened on the upper side of the exhaust pipe. A groove is opened on the right side of the track. The expansion groove includes a motor fixedly connected to the rear side of the wheel housing, a fan wheel fixedly connected to the end of the motor's output shaft inside the wheel housing, a first drive mechanism including a connecting rail plate slidably connected to the track, a guide block fixedly connected to the lower end of the connecting rail plate inside the exhaust pipe, a spring fixedly connected between the right end face of the connecting rail plate and the right inner wall of the expansion groove, a connecting bar fixedly connected to the front side of the connecting rail plate, and the right end of the connecting bar fixedly connected to the left end face of the valve plate, a second drive mechanism including a rotating shaft rotatably connected to the exhaust pipe hole, an impeller fixedly connected to the outer side of the rotating shaft inside the expansion cavity, a take-up reel fixedly connected to the front end of the rotating shaft to the left side of the pumping section, and a pull rope fixedly connected between the inner wall of the take-up groove of the take-up reel and the left end of the piston rod.

[0013] Preferably, the upper end face of the guide block is in contact with the upper inner wall of the exhaust pipe. The guide block is a right-angled trapezoidal block structure with a shorter left side and a longer right side. The bottom of the guide block is set with an arc-shaped curved surface. The guide block is set on the upper side of the impeller. The distance between the right end face of the connecting rail plate and the right inner wall of the rail is the same as the distance between the center of the water passage and the center of the one-way valve. The spring is set between the left inner wall of the reservoir and the left end face of the piston plate. The outer end face of the piston plate is in contact with the inner wall of the reservoir. The piston rod is composed of a right cross rod and a left pull block.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. In this invention, through the design of a positioning heat-conducting part, a protective isolation module, a pipe arrangement, a pressure relief valve, and a whistle, when the equipment is not started according to the correct procedure, the heating pipes in the heating section may experience heat accumulation and overheating. The cooling water in the positioning heat-conducting part can absorb the heat generated by the heating pipes and turn it into water vapor, carrying away the heat while simultaneously deploying the protective isolation module to isolate external personnel from contact with the inner shell of the insulation shell, thereby reducing the risk of burns to workers who touch the outer surface of the insulation shell. Excess water vapor will be discharged through the pipe arrangement, pressure relief valve, and whistle, with the whistle emitting a warning sound to alert the workers. This design enables the anti-scalding heating equipment of the heating circulating fan to provide multiple protections against overheating, including isolation, warning, and cooling, in addition to thermocouple overheat detection and protection measures. When the equipment overheats, it can quickly cool down to protect the heating elements, isolate personnel from the equipment to reduce the risk of burns, and warn personnel to proceed to the manual handling stage. This design solves the problem that when the heating equipment of the existing heating circulating fan overheats, the thermal insulation performance of the shell may fail or be greatly reduced, causing the shell surface to heat up rapidly and increasing the risk of burns to personnel.

[0016] 2. In this invention, through the structure of drive mechanism one, drive mechanism two, water pumping unit, and controllable flow section, when the equipment is started according to the correct steps, the airflow generated by the fan module will drive drive mechanism one and drive mechanism two to operate. The operation of drive mechanism one will change the flow pipe of controllable flow section to a bidirectional passage state. The operation of drive mechanism two will allow the water pumping unit to extract cooling water from the liquid chamber through the flow pipe. In this way, when the heating tube is heating, since the cooling water in the liquid chamber has been pumped into the storage tank, the multiple protection measures of isolation, warning and cooling will not be triggered when the equipment is started correctly, thus ensuring the normal operation of the equipment and avoiding the false activation of protection measures. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 For the present invention Figure 1 A schematic diagram of the structure viewed from below;

[0019] Figure 3 For the present invention Figure 1 A schematic diagram of the left-side view structure;

[0020] Figure 4 For the present invention Figure 1 A schematic diagram of the cross-sectional structure;

[0021] Figure 5 For the present invention Figure 4 A schematic diagram of the structure at point A;

[0022] Figure 6 This is a schematic diagram of the structure of the fan module of the present invention;

[0023] Figure 7 For the present invention Figure 6 A schematic diagram of the frontal sectional view of the structure;

[0024] Figure 8 This is a cross-sectional view of the volute of the present invention;

[0025] Figure 9 This is a schematic diagram of the volute structure of the present invention;

[0026] Figure 10 This is a schematic diagram of the disassembled structure of the shell portion of the present invention;

[0027] Figure 11 This is a schematic diagram of the heating element of the present invention;

[0028] Figure 12 This is a schematic diagram of the structure of the heating part of the present invention;

[0029] Figure 13 This is a schematic diagram of the structure of the heat-conducting part of the present invention;

[0030] Figure 14 For the present invention Figure 13 A schematic diagram of the dissected structure;

[0031] Figure 15 For the present invention Figure 14 A schematic diagram of the structure at point B;

[0032] Figure 16 This is a schematic diagram of the cross-sectional structure of the heat-conducting frame shell of the present invention;

[0033] Figure 17 This is a cross-sectional view of the protective isolation module of the present invention;

[0034] Figure 18 This is a cross-sectional view of the transmission extension section of the present invention;

[0035] Figure 19 This is a schematic diagram of the structure of the connecting plate in this invention;

[0036] Figure 20 This is a cross-sectional view of the controllable flow section of the present invention;

[0037] Figure 21 This is a cross-sectional view of the pumping section of the present invention.

[0038] In the diagram: 1. Base; 2. Fan module; 21. Volute; 211. Wheel housing; 212. Air inlet; 213. Exhaust pipe; 214. Expansion cavity; 215. Track; 216. Expansion groove; 22. Motor; 23. Fan wheel; 24. Drive mechanism one; 241. Linkage rail plate; 242. Guide block; 243. Spring one; 244. Linkage bar; 25. Drive mechanism two; 251. Shaft; 252. Impeller; 253. Winding reel; 254. Pull rope; 3. Shell; 31. Insulation shell; 32. Mounting port; 33. Perforation one; 34. Perforation two; 4. Heating section; 41. Insulation plate; 42. Heating tube; 43. Support tube; 44. Junction box; 45. Thermocouple; 5. Positioning heat-conducting section; 51 52. Heat-conducting frame; 53. Positioning grid; 54. Liquid chamber; 55. Float; 56. Interface 1; 57. Interface 2; 6. Protective isolation module; 68. Transmission pipe; 69. Transmission expansion section; 60. Seat sleeve; 61. Conduit; 62. Guide channel; 62. Elastic folding airbag; 62. Guide plate; 63. Spring 2; 64. Intermediate plate; 65. Linkage folding plate; 76. Partition curtain; 77. Controllable flow section; 78. Through pipe; 79. Rail shell; 70. Valve plate; 71. One-way valve; 72. Water passage hole; 73. Liquid filling valve pipe; 74. Drain pipe; 75. Pressure relief valve; 86. Sentry; 87. Pumping section; 88. Storage tank; 89. Piston plate; 80. Piston rod; 81. Spring 3; 9. Control box. Detailed Implementation

[0039] Please see Figure 1-21 The present invention provides a technical solution:

[0040] A scalding-proof heating device for a heating circulating fan includes a base 1, a fan module 2, a shell 3, a heating section 4, a positioning heat-conducting section 5, a protective isolation module 6, a controllable flow section 7, a water pumping section 8, and a control box 9. The fan module 2 is mounted on the upper side of the base 1. The shell 3 is mounted on the right side of the fan module 2. The shell 3 includes a heat-insulating shell 31 fixed to the upper side of the base 1. An opening 32 is provided on the upper side of the heat-insulating shell 31. A pair of through holes 33 are provided on both the front and rear sides of the heat-insulating shell 31. A second through hole 34 is provided on the front side of the heat-insulating shell 31 to the right of the first through hole 33. A positioning heat-conducting section 5 is installed inside the shell 3. The positioning heat-conducting section 5 includes a heating section 4, a positioning heat-conducting section 5, and a heat-insulating section 6. A heat-conducting frame shell 51 is fixedly connected to the inner wall of the heat-conducting shell 31. Several equidistantly arranged positioning grilles 52 are opened on the inner side of the heat-conducting frame shell 51. A liquid cavity 53 with an upward opening is opened on the inner side of the heat-conducting frame shell 51. A float plate 54 is slidably connected to the inner side of the liquid cavity 53. A pair of interfaces 55 communicating with the liquid cavity 53 are opened on both the front and rear sides of the lower end face of the heat-conducting frame shell 51. An interface 56 communicating with the liquid cavity 53 is opened on the right side of the lower end face of the heat-conducting frame shell 51. Protective isolation modules 6 are installed on both the front and rear sides of the positioning heat-conducting part 5. A control box 9 located in front of the fan module 2 is fixedly connected to the upper side of the base 1. The protective isolation module 6 includes... A pair of transmission pipes 61 connected to interface 55, the other end of each transmission pipe 61 passing through through hole 33 to install a transmission expansion part 62. The transmission expansion part 62 includes a seat 621 connected to the transmission pipe 61. The upper and lower sides of the seat 621 are fixedly connected to conduits 622. The side of the conduits 622 away from the shell 3 has a guide channel 623. The upper and lower sides of the seat 621 are fixedly connected to elastic folding airbags 624 located inside the conduits 622. The side of the elastic folding airbags 624 away from the seat 621 is fixedly connected to a guide plate 625 that is slidably connected to the guide channel 623. The side of the guide plate 625 away from the elastic folding airbags 624 is fixedly connected to a guide plate 625 that is slidably connected to the guide channel 623. A spring 626 is connected to the inner side of the guide tube 622. A middle plate 63 is fixedly connected between the left and right seat sleeves 621. A linkage folding plate 64 is symmetrically arranged on both the upper and lower sides of the middle plate 63. The side of the linkage folding plate 64 closest to the shell 3 is fixedly connected to the protruding end of the guide plate 625. A folded curtain 65 is fixedly connected to both the upper and lower sides of the middle plate 63. The end of the curtain 65 away from the middle plate 63 is fixedly connected to the channel of the linkage folding plate 64. The protective isolation module 6 can isolate external personnel from contact with the inner shell of the heat insulation shell 31 after unfolding, thereby reducing the risk of workers being burned by touching the outer surface of the heat insulation shell 31.A controllable flow section 7 is installed on the lower side of the positioning heat-conducting part 5. The controllable flow section 7 includes a through pipe 71 fixed inside the perforation 34. The upper rear end of the through pipe 71 is connected to the interface 56. A rail housing 72 located on the front side of the shell 3 is fixedly connected to the through pipe 71. A valve plate 73 is slidably connected to the inner side of the rail housing 72. A one-way valve 74, aligned with the riser of the through pipe 71, is installed in the right opening of the valve plate 73. A water passage hole 75 located to the left of the one-way valve 74 is opened on the inner side of the valve plate 73. A liquid filling valve pipe 76 located above the one-way valve 74 is connected to the right side of the through pipe 71. A drain pipe 77 located above the liquid filling valve pipe 76 is connected to the right side of the through pipe 71. A pressure relief valve 78 is installed on the riser of the drain pipe 77. A whistle is connected to the upper end of the drain pipe 77. 79. The controllable flow section 7 can be used as a controllable passage, and its pipe 77 and pressure relief valve 78 can be used for pressure relief. The whistle 79 can be used for warning. A heating section 4 is installed in the shell 3. The heating section 4 includes a heat insulation plate 41 inside the inlet 32. The heat insulation plate 41 and the heat insulation shell 31 are detachably connected by bolts. This setting allows the heating section 4 to be removed from the shell 3. Several heating tubes 42 are fixedly connected to the lower side of the heat insulation plate 41 and are arranged at equal intervals. The heating tubes 42 are all inside the heat insulation shell 31. Several support tubes 43 are fixedly connected to the upper side of the heat insulation plate 41. A junction box 44 is fixedly connected to the upper side of the support tubes 43. A thermocouple 4 is installed inside the junction box 44. 5. The detection end of the thermocouple 45 passes through the insulation plate 41 and is inserted into the inner side of the insulation shell 31. This arrangement allows the thermocouple 45 to detect overheating at the heating tube 42. The insulation shell 31 consists of an outer shell and an inner insulation layer. This arrangement gives the insulation shell 31 the ability to insulate heat. The support tubes 43 are all arranged at equal intervals, and each support tube 43 corresponds to a lower heating tube 42. This arrangement allows the heating tube 42 to be connected to the junction box 44 by passing wires through the support tubes 43. The heating tubes 42 are all located inside the positioning grid 52, and the fins of the heating tubes 42 are all in contact with the inner wall of the positioning grid 52. The positioning heat-conducting part 5 is located in the middle area of ​​the heating tube 42. This arrangement allows the positioning heat-conducting part 5 to be located in the middle area of ​​the heating tube 42. The heat-conducting part 5 can position each heating tube 42 to prevent the heating tube 42 from vibrating when the airflow passes through. The outer end face of the float plate 54 is tightly attached to the inner wall of the liquid cavity 53. This setting prevents the cooling water from leaking. The protective isolation modules 6 are all set on the front and rear sides of the shell 3 and the heating part 4. The height dimension of the curtain 65 after unfolding is 0.5 times the height dimension of the shell 3. The length dimension of the curtain 65 is the same as the length dimension of the middle shell of the heat insulation shell 31. This setting allows the curtain 65 of the protective isolation module 6 to isolate the overheated area after unfolding. The folds of the curtain 65 are all pre-pressed with creases. This setting allows the curtain 65 to return to the folded state after reset.The outer end face of the valve plate 73 fits snugly against the inner wall of the rail housing 72, preventing leakage due to gaps. The one-way valve 74 is designed for unidirectional flow from bottom to top, allowing the flow pipe 71 to flow unidirectionally from bottom to top under normal conditions. The liquid filling valve pipe 76 consists of a pipe body and a regulating valve, allowing for the replenishment of water to the liquid chamber 53. The upper end of the drain pipe 77 and the whistle 79 are both positioned above the heating unit 4, preventing steam from being discharged from a height from causing burns to personnel.

[0041] like Figures 1-3 , Figures 6-9 , Figure 21As shown, a water pumping unit 8 is installed on the front side of the shell 3. The water pumping unit 8 includes a storage shell 81 fixedly connected to the front end face of the heat insulation shell 31, and the storage shell 81 is connected to the lower left end of the through pipe 71. A piston rod 83 is slidably connected to the left circular opening of the storage shell 81. A piston plate 82 located inside the storage shell 81 is fixedly connected to the right end of the piston rod 83. A spring 84 is sleeved on the outer side of the piston rod 83. The fan module 2 includes a volute 21, a motor 22, a fan wheel 23, a drive mechanism 1 24, and a drive mechanism 25. The volute 21 includes a wheel housing 211 set on the upper side of the seat block of the base 1. An air inlet is opened on the front side of the wheel housing 211. 212, an exhaust pipe 213 is fixedly connected to the right side of the wheel housing 211, and the exhaust pipe 213 is detachably connected to the heat insulation shell 31 by bolts. An expansion cavity 214 is provided on the lower side of the exhaust pipe 213, and a track 215 is provided on the upper side of the exhaust pipe 213. An expansion groove 216 is provided on the right side of the track 215. A motor 22 is fixedly connected to the rear side of the wheel housing 211, and a fan wheel 23 located inside the wheel housing 211 is fixedly connected to the end of the output shaft of the motor 22. The drive mechanism 24 includes a linkage rail plate 241 slidably connected to the track 215, and the lower end of the linkage rail plate 241 is fixedly connected to the fan wheel 23 located inside the exhaust pipe 211. The guide block 242 on the inner side of the 3 is fixedly connected to the right end face of the linkage rail plate 241 and the right inner wall of the expansion groove 216 by a spring 243. A linkage bar 244 is fixedly connected to the front side of the linkage rail plate 241, and the right end of the linkage bar 244 is fixedly connected to the left end face of the valve plate 73. The second drive mechanism 25 includes a rotating shaft 251 rotatably connected to the hole of the exhaust pipe 213. An impeller 252 located inside the expansion cavity 214 is fixedly connected to the outer side of the rotating shaft 251. A take-up reel 253 located on the left side of the pumping section 8 is fixed to the front end of the rotating shaft 251. The inner wall of the take-up groove of the take-up reel 253 is fixedly connected to the left end of the piston rod 83. A pull rope 254 is fixedly connected. When the equipment is started according to the correct procedure, the airflow generated by the fan module 2 will drive the drive mechanism 1 24 and drive mechanism 25. The action of drive mechanism 1 24 will make the pipe 71 of the controllable flow section 7 a bidirectional passage. The action of drive mechanism 2 25 will allow the pumping section 8 to draw cooling water from the liquid chamber 53 through the pipe 71. In this way, when the heating tube 42 is heating, the cooling water in the liquid chamber 53 has been drawn into the storage tank 81. Under the condition that all equipment is running and starting correctly, the multiple protection measures of isolation, warning and cooling will not be triggered.The upper end face of the guide block 242 is in contact with the upper inner wall of the exhaust pipe 213. This arrangement improves the stability of the guide block 242 during displacement. The guide block 242 is a right-angled trapezoidal block structure with a shorter left side and a longer right side. The bottom of the guide block 242 is set with an arc-shaped curved surface. This arrangement allows the airflow to push the guide block 242 to move. The guide block 242 is set on the upper side of the impeller 252. The distance between the right end face of the connecting rail plate 241 and the right inner wall of the track 215 is the same as the distance between the center of the water hole 75 and the center of the one-way valve 74. This arrangement ensures that the rightward-moving connecting rail plate 241 and the track 215 are in close contact. When the right inner wall of valve plate 73 contacts the piston plate 82, the valve plate 73 is pushed to the right by the linkage 244. The water passage 75, which moves accordingly, will align and connect with the through pipe 71. Spring 84 is positioned between the left inner wall of the reservoir 81 and the left end face of the piston plate 82. This arrangement allows spring 84 to be used for resetting the piston plate 82. The outer end face of the piston plate 82 is in contact with the inner wall of the reservoir 81. This arrangement prevents cooling water from leaking to the left side of the piston plate 82. The piston rod 83 consists of a right cross rod and a left pull block. This arrangement allows the piston plate 82 to move to the left, venting the gas from the left side of the piston plate 82 inside the reservoir 81.

[0042] Workflow: The protective operation of the anti-scalding heating equipment for the heating circulating fan is as follows: Note 1: All electrical appliances in this application are powered by an external power source and are centrally controlled through the control box 9; Note 2: The liquid chamber 53 inside the positioning heat-conducting part 5 will be pre-filled with distilled water for cooling. After the cooling water is pre-filled, it will lift the float 54. The pre-filling method for the cooling water is to open the liquid filling valve pipe 76, and then connect the external water filling pipe to the liquid filling valve pipe 76, so that the water passes through the liquid filling valve pipe 76 and the connecting pipe 71 into the liquid chamber 53. Since the elastic folding airbag 624 is connected to the liquid chamber 53 through the transmission pipe 61 and the seat sleeve 621, the pre-filling of the cooling water... Whether the replenishment amount is sufficient can be determined by observing the changes in the elastic folding airbag 624. If the elastic folding airbag 624 shows signs of unfolding, it indicates that the liquid chamber 53 is full, and the pre-filling of cooling water is completed. Protective operation: During operation, if the operator, due to operational error or equipment failure, starts the heating unit 4 before starting the fan module 2, the heat generated by the tightly connected and operating heating pipes 42 will not be dissipated in time. This will cause the temperature between the heating pipes 42 to rise rapidly, resulting in heat accumulation and overheating. This overheating may exceed the heat resistance limit of the insulation layer of the insulation shell 31, leading to the insulation... The reduced heat effect causes the surface of the insulation shell 31 to heat up rapidly, increasing the risk of burns to workers. To address this, existing protective measures are implemented: thermocouple 45 detects overheating and transmits a signal to control box 9. Control box 9 then stops the heating tube 42, halting further heating. Subsequently, the heat generated by the heating tube 42 exchanges heat with the cooling water in the liquid chamber 53 through the heat-conducting frame shell 51. The cooling water absorbs a large amount of heat, expands rapidly, and turns into water vapor. The generated water vapor is discharged through the transmission pipes 61 connected to the liquid chamber 53 into the seat sleeves 621 of each transmission extension section 62. Then, it enters the elastic folding airbag 624. As the water vapor continues to increase, the elastic folding airbag 624 will be forced to unfold quickly and push the upper and lower guide plates 625 to move in opposite directions, compressing the second spring 626. This will cause the upper and lower linkage folding plates 64 connected to the guide plates 625 to also move in opposite directions, away from the middle connecting plate 63. The movement of the linkage folding plates 64 away from the middle connecting plate 63 will unfold the folded curtain 65. The unfolded curtain 65 will cover the front and rear sides of the middle shell of the insulation shell 31, isolating external personnel from contact with the middle shell of the insulation shell 31, thereby reducing the risk of workers being burned by touching the outer surface of the insulation shell 31, and completing the isolation operation.When all the elastic folding airbags 624 are fully deployed, and water vapor is still being generated, the pressure will continue to rise. When the pressure reaches a certain level, the water vapor will be discharged through the drain pipe 77 and the pressure relief valve 78. During the discharge process, the water vapor will pass through the whistle 79, emitting a whistle to warn the staff that the heating element 4 is overheating and the fan module 2 has not started properly, thus completing the warning operation. Subsequently, the generation and discharge of water vapor will quickly remove the heat from the heating tube 42, rapidly reducing the overheating at the heating tube 42 and completing the cooling operation. This process can prevent the heating tube 42 from being damaged due to overheating. Even if the heating element 4 fails to shut down immediately due to a malfunction of thermocouple 45, the cooling operation combined with warning measures can still protect the heating element 42 from overheating for a short period of time. As described above, the multiple protection measures of this application can operate independently of the thermocouple 45 overheat detection protection. Even if the thermocouple 45 overheat detection fails, it can still protect the heating element 42 from overheating and warn personnel to manually shut down the equipment. This allows the anti-scalding heating equipment of the heating circulating fan to operate independently of the thermocouple 45 overheating protection. In addition to detection and protection measures, the system provides multiple protections for overheated heating equipment, including isolation, warning, and cooling. When the equipment overheats, it can rapidly cool down to protect the heating elements, isolate personnel from the equipment to reduce the risk of burns, and warn workers to facilitate manual handling. This design solves the problem that existing heating circulating fans may experience insulation failure or significant reduction when the equipment overheats, leading to rapid surface heating and increased risk of burns. Reset Operation: During the reset operation, the water vapor inside the elastic folding airbag 624 will gradually dissipate over time. As the water vapor in the airbag gradually cools and recondenses into liquid water, the second spring 626 will gradually regain its elasticity and unfold, pushing the guide plate 625 to move. This process will cause the elastic folding airbag 624 to continuously contract until it is completely restored to its initial shape. At the same time, the displacement of the guide plate 625 will drive the linkage folding plate 64 to reset, thereby causing the curtain 65 to be compressed again and restored to the folded state, completing the reset operation of the protective isolation module 6. Finally, the staff needs to replenish the cooling water lost due to vaporization in the liquid cavity 53 of the positioning heat conduction part 5 to complete the reset work of the entire positioning heat conduction part 5.Correct Start-up Operation: Under normal operating conditions, first start the fan module 2. At this time, the running motor 22 will drive the fan wheel 23 to rotate at high speed. Then, the airflow enters from the air inlet 212, passes through the exhaust pipe 213 and enters the housing 3, and finally exits from the right end of the housing 3. During this process, the airflow will push the guide block 242 to the right. The rightward movement of the guide block 242 will drive the connecting rail plate 241 and the connecting bar 244 to the right, which in turn will push the valve plate 73 of the controllable flow section 7 to the right. The displacement of the valve plate 73 will cause the water passage hole 75 to move to the right and align with the through pipe 71, thus making the through pipe 71 a bidirectional passage. On the other hand... The airflow continuously drives the impeller 252 to rotate, causing the shaft 251 and the winding reel 253 to rotate. The rotation of the winding reel 253 winds up the pull rope 254, which in turn pulls the piston rod 83 of the pumping section 8 to the left, causing the piston plate 82 to move to the left, squeezing the spring 84. The cooling water in the liquid chamber 53 of the positioning heat-conducting section 5 is then drawn into the storage shell 81 through the pipe 71. As the cooling water in the liquid chamber 53 decreases, the float 54 moves downward, so that no cooling water remains in the liquid chamber 53 of the positioning heat-conducting section 5. After the above operations are completed, the heating pipe 42 of the heating section 4 is activated to heat the airflow penetrating the shell section 3, so that the discharged airflow becomes high-temperature gas. Because the heat is carried away by the airflow, heat accumulation and overheating will not occur inside the shell 3, thus avoiding damage to the heating tube 42. Simultaneously, the insulation layer inside the insulation shell 31 can maximally prevent heat conduction to the outer surface, ensuring that the temperature of the outer surface of the insulation shell 31 will not cause burns to personnel. Since the cooling water in the liquid chamber 53 has been pumped into the storage tank 81, the multiple protection measures of isolation, warning, and cooling will not be triggered when all equipment is operating correctly, thus ensuring the normal operation of the equipment and preventing accidental activation of protection measures. When the equipment stops operating, the fan module 2 will no longer generate airflow, thus losing its function. The airflow propulsion causes spring 243 to reset and unfold, causing the guide block 242, connecting rail 241, and connecting bar 244 to shift to the left. This pulls valve plate 73, water passage 75, and check valve 74 to shift to the left, realigning check valve 74 with pipe 71 and making pipe 71 a one-way passage. Simultaneously, spring 84 resets and unfolds, pushing piston plate 82 to shift to the right. This forces cooling water in reservoir 81 to pass through pipe 71 and check valve 74 back into liquid chamber 53, causing float plate 54 to float again. This completes the reset of drive mechanism 24, drive mechanism 25, controllable flow section 7, pumping section 8, and positioning heat-conducting section 5.

[0043] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only for the purpose of helping to understand the method and core ideas of the present invention. The above descriptions are only preferred embodiments of the present invention. It should be noted that due to the limitations of textual expression, while there are objectively infinite specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of the present invention, and can also combine the above technical features in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of the present invention.

Claims

1. A scalding-proof heating device for a heating circulating fan, comprising a base (1), a fan module (2), a shell (3), a heating part (4), a positioning heat-conducting part (5), a protective isolation module (6), a controllable flow part (7), a water pumping part (8), and a control box (9), characterized in that: A fan module (2) is installed on the upper side of the seat block of the base (1). A shell (3) is installed on the right side of the fan module (2). The shell (3) includes a heat insulation shell (31) fixed on the upper side of the base (1). An installation port (32) is opened on the upper side of the heat insulation shell (31). A pair of through holes (33) are opened on both the front and rear sides of the heat insulation shell (31). A through hole (34) is opened on the front side of the heat insulation shell (31) to the right of the through hole (33). A positioning heat conduction part (5) is installed on the inner side of the shell (3). The positioning heat conduction part (5) includes a heat conduction frame shell (51) fixedly connected to the inner wall of the heat insulation shell (31). A number of positioning parts arranged at equal intervals are opened on the inner side of the heat conduction frame shell (51). The heat-conducting frame (51) has an upper-opening liquid cavity (53) on its inner side. A float plate (54) is slidably connected to the inner side of the liquid cavity (53). A pair of interfaces (55) communicating with the liquid cavity (53) are provided on both the front and rear sides of the lower end face of the heat-conducting frame (51). An interface (56) is provided on the right side of the lower end face of the heat-conducting frame (51), and the interface (56) is connected to the liquid cavity (53). Protective isolation modules (6) are installed on both the front and rear sides of the positioning heat-conducting part (5). A control box (9) located in front of the fan module (2) is fixedly connected to the upper side of the base (1). The protective isolation module (6) includes a pair of transmission pipes (61) communicating with the interface (55). The other end of the transmission tube (61) is installed with a transmission expansion part (62) through the perforation (33). The transmission expansion part (62) includes a seat (621) connected to the transmission tube (61). The upper and lower sides of the seat (621) are fixedly connected with conduits (622). The side of the conduit (622) away from the shell (3) is provided with a guide channel (623). The upper and lower sides of the seat (621) are fixedly connected with elastic folding airbags (624) located inside the conduit (622). The side of the elastic folding airbag (624) away from the seat (621) is fixedly connected with a guide plate (625) that is slidably connected to the guide channel (623). The side of the guide plate (625) away from the elastic folding airbag (624) is fixedly connected with a guide plate (625) that is slidably connected to the guide channel (623). A spring 2 (626) is fixedly connected to the inside of the conduit (622). A middle plate (63) is fixedly connected between the left and right seat sleeves (621). A linkage folding plate (64) is symmetrically arranged on both the upper and lower sides of the middle plate (63). The side of the linkage folding plate (64) closest to the shell (3) is fixedly connected to the protruding end of the guide plate (625). A folded curtain (65) is fixedly connected to both the upper and lower sides of the middle plate (63). The end of the curtain (65) away from the middle plate (63) is fixedly connected to the channel of the linkage folding plate (64). A controllable flow section (7) is installed on the lower side of the positioning heat conduction part (5). The controllable flow section (7) includes a through pipe (71) fixed inside the perforation 2 (34).The upper rear end of the through pipe (71) is connected to the second interface (56). A rail housing (72) located on the front side of the shell (3) is fixedly connected to the through pipe (71). A valve plate (73) is slidably connected to the inner side of the rail housing (72). A one-way valve (74) aligned with the riser of the through pipe (71) is installed in the right opening of the valve plate (73). A water passage hole (75) located on the left side of the one-way valve (74) is opened on the inner side of the valve plate (73). A liquid filling valve pipe (76) located above the one-way valve (74) is connected to the right side of the through pipe (71). A drain pipe (77) located above the liquid filling valve pipe (76) is connected to the right side of the through pipe (71). A pressure relief valve (78) is installed on the riser of the drain pipe (77). A whistle (79) is connected to the upper end of the drain pipe (77).

2. The anti-scalding heating device for a heating circulating fan according to claim 1, characterized in that: A heating element (4) is installed at the shell (3). The heating element (4) includes a heat insulation plate (41) inside the loading port (32). The heat insulation plate (41) and the heat insulation shell (31) are connected by bolts. A number of heating tubes (42) are fixedly connected to the lower side of the heat insulation plate (41) and are arranged at equal intervals. The heating tubes (42) are all located inside the heat insulation shell (31). A number of support tubes (43) are fixedly connected to the upper side of the heat insulation plate (41). A junction box (44) is fixedly connected to the upper side of the support tubes (43). A thermocouple (45) is installed inside the junction box (44). The detection end of the thermocouple (45) passes through the heat insulation plate (41) and is inserted into the inner side of the heat insulation shell (31).

3. The anti-scalding heating device for a heating circulating fan according to claim 2, characterized in that: The heat insulation shell (31) consists of an outer shell and an inner heat insulation interlayer. The support tubes (43) are all arranged at equal intervals. The support tubes (43) and the lower heating tubes (42) are arranged in a one-to-one correspondence. The heating tubes (42) are all located inside the positioning grid (52). The fins of the heating tubes (42) are all in contact with the inner wall of the positioning grid (52). The positioning heat-conducting part (5) is located in the middle area of ​​the heating tubes (42). The float plate (54) The outer end face of the ) is closely fitted to the inner wall of the liquid cavity (53). The protective isolation modules (6) are all set on the front and rear sides of the shell (3). The protective isolation modules (6) are all set on the front and rear sides of the heating part (4). The height dimension of the curtain (65) after unfolding is 0.5 times the height dimension of the shell (3). The length dimension of the curtain (65) is the same as the length dimension of the middle shell of the heat insulation shell (31). The folds of the curtain (65) are all pre-pressed with creases.

4. The anti-scalding heating device for a heating circulating fan according to claim 2, characterized in that: The outer end face of the valve plate (73) is in contact with the inner wall of the rail housing (72). The one-way valve (74) is configured for one-way flow from bottom to top. The liquid filling valve pipe (76) consists of a pipe body and a regulating valve. The upper end of the drain pipe (77) and the whistle (79) are both set higher than the heating part (4).

5. The anti-scalding heating device for a heating circulating fan according to claim 2, characterized in that: A water pumping unit (8) is installed on the front side of the shell (3). The water pumping unit (8) includes a storage shell (81) fixedly connected to the front end face of the heat insulation shell (31), and the storage shell (81) is connected to the lower left end of the connecting pipe (71). A piston rod (83) is slidably connected to the left round opening of the storage shell (81). A piston plate (82) located inside the storage shell (81) is fixedly connected to the right end of the piston rod (83). A spring three (84) is sleeved on the outside of the piston rod (83). The fan module (2) includes a volute (21), a motor (22), a fan wheel (23), and a drive motor. The first structure (24) and the second drive mechanism (25) are described. The volute (21) includes a wheel housing (211) disposed on the upper side of the seat block of the seat body (1). An air inlet (212) is provided on the front side of the wheel housing (211). An exhaust pipe (213) is fixedly connected to the right side of the wheel housing (211), and the exhaust pipe (213) is detachably connected to the heat insulation shell (31) by bolts. An expansion cavity (214) is provided on the lower side of the exhaust pipe (213), and a track (215) is provided on the upper side of the exhaust pipe (213). An expansion groove (214) is provided on the right side of the track (215). 16) A motor (22) is fixedly connected to the rear side of the wheel housing (211). The output shaft of the motor (22) is fixedly connected to a fan wheel (23) inside the wheel housing (211). The drive mechanism (24) includes a connecting rail plate (241) that is slidably connected to the track (215). The lower end of the connecting rail plate (241) is fixedly connected to a guide block (242) inside the exhaust pipe (213). A spring (243) is fixedly connected between the right end face of the connecting rail plate (241) and the right inner wall of the expansion groove (216). A linkage bar (244) is fixedly connected to the front side, and the right end of the linkage bar (244) is fixedly connected to the left end face of the valve plate (73). The second drive mechanism (25) includes a rotating shaft (251) rotatably connected to the hole of the exhaust pipe (213). An impeller (252) located inside the expansion cavity (214) is fixedly connected to the outside of the rotating shaft (251). A take-up reel (253) located on the left side of the pumping part (8) is fixedly connected to the front end of the rotating shaft (251). A pull rope (254) is fixedly connected between the inner wall of the take-up groove of the take-up reel (253) and the left end of the piston rod (83).

6. The anti-scalding heating device for a heating circulating fan according to claim 5, characterized in that: The upper end face of the guide block (242) is in contact with the upper inner wall of the exhaust pipe (213). The guide block (242) is a right-angled trapezoidal block structure with a shorter left side and a longer right side. The bottom of the guide block (242) is set with an arc-shaped curved surface. The guide block (242) is set on the upper side of the impeller (252). The distance between the right end face of the connecting rail plate (241) and the right inner wall of the rail (215) is the same as the distance between the center of the water passage hole (75) and the center of the one-way valve (74). The spring three (84) is set between the left inner wall of the storage shell (81) and the left end face of the piston plate (82). The outer end face of the piston plate (82) is in contact with the inner wall of the storage shell (81). The piston rod (83) is composed of a right cross rod and a left pull block.

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