Steam generator secondary heating structure and steam generator thereof

Abstract

The utility model discloses a steam generator secondary heating structure and steam generator belong to steam technical field, including jar body, the top cover of jar body top has, the top cover has steam exhaust pipe, the steam return air pipe is fixedly connected with the lower extreme of jar body lateral wall, and jar body is connected with the water inlet subassembly, and the water inlet subassembly includes water inlet pipe, water outlet pipe and spiral tube, and spiral tube has water outlet pipe and water inlet pipe, and water inlet pipe and water outlet pipe are fixedly connected with jar body, the top of top cover is connected with cleaning assembly, and cleaning assembly includes rotary drive subassembly and follow -up type scraping subassembly, and rotary drive subassembly is connected with top cover, and rotary drive subassembly is movably connected with follow -up type scraping subassembly, and follow -up type scraping subassembly is slidably connected with spiral tube. The utility model is helpful to the preheating treatment of the water that enters into the steam generator, is helpful to the secondary use of the heat of water vapor after use, greatly shortens steam generator water -boiling time, promotes steam generator in short time rapid heating and produces steam, reaches the energy -conserving and environment -protective effect.

Description

Technical Field

[0001] This utility model relates to the field of steam technology, specifically to a secondary heating structure for a steam generator and a steam generator thereof. Background Technology

[0002] Currently, steam ovens on the market come in two types: electric heating element heating and steam heating. Electric heating element heating works by heating water to boiling using electric heating elements, which raises the temperature inside the oven to achieve the purpose of steaming.

[0003] Chinese Patent CN210961464U discloses an electric steam stewing oven, comprising a cabinet with a door. Multiple vertically spaced supports with ventilation holes are located in the upper middle part of the cabinet. An electric steam generator is located in the lower part of the cabinet, with its outlet facing upwards to heat the stewing container placed on the supports. The water inlet of the electric steam generator is connected to an electromagnetic pump outside the cabinet via a connecting pipe. The electromagnetic pump is also connected to a water container via a connecting pipe, pumping liquid from the water container into the electric steam generator. This electric steam stewing oven saves water, electricity, and time, achieving automated stewing control for tonics.

[0004] However, the structure disclosed in the above patent directly discharges water vapor after use, which easily causes a large amount of heat loss and high energy consumption. At the same time, the steam generator is not designed with a scale removal structure, and the scale generated by heating is easy to fall onto the heating structure, which reduces the heat transfer efficiency of the heating structure and increases energy consumption. In addition, the existing water level detection component is an insertion-type temperature detection component. Insertion-type temperature detection components are in a high-temperature environment for a long time, which can easily cause damage to the detection end of the insertion-type temperature detection component, which is not conducive to long-term use.

[0005] Based on this, the present invention designs a secondary heating structure for a steam generator and a steam generator thereof to solve the above problems. Utility Model Content

[0006] In view of the above-mentioned shortcomings of the existing technology, this utility model provides a secondary heating structure for a steam generator and a steam generator thereof.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A secondary heating structure for a steam generator includes a tank.

[0009] A top cover for steam discharge is fixedly connected to the top of the tank;

[0010] A steam exhaust pipe is fixedly connected to the top of the cover;

[0011] A steam return pipe is fixedly connected to the lower end of the side wall of the tank for the steam to enter the tank after use;

[0012] The tank body is connected to an inlet assembly for cold water circulation. The inlet assembly includes an inlet pipe, an outlet pipe, and a spiral pipe. The outlet pipe and the inlet pipe are fixedly connected to the upper and lower ends of the spiral pipe, respectively, and the inlet pipe and the outlet pipe are fixedly connected to the tank body.

[0013] A cleaning assembly is connected to the top of the top cover. The cleaning assembly includes a rotary drive assembly and a follow-up scraping assembly. The rotary drive assembly is connected to the top cover, and the rotary drive assembly is movably connected to the follow-up scraping assembly. The follow-up scraping assembly is slidably connected to the spiral tube.

[0014] The follow-up scraping assembly includes a straight rod, an annular body, a horizontal plate, and a scraper ring. The rotation drive assembly is fixedly connected to the top of the straight rod, and the horizontal plate is slidably connected to the rotation drive assembly. The annular body and the scraper ring are fixedly connected to both ends of the horizontal plate, respectively. The inner wall of the annular body is slidably connected to the outer wall of the straight rod, the horizontal plate is slidably connected to the straight rod through a straight hole, and the scraper ring is slidably connected to the outer wall of the spiral tube through a spiral sliding hole.

[0015] Furthermore, the rotation drive assembly includes a motor and an L-shaped push rod. The motor is fixedly installed on the top of the cover, and the L-shaped push rod is fixedly connected to the drive end of the motor. The L-shaped push rod is movably connected to the follow-up scraping assembly, and the drive end of the motor is fixedly connected to the follow-up scraping assembly. The straight rod is fixedly installed at the bottom of the output end of the motor, and the horizontal plate is slidably connected to the upright part of the L-shaped push rod through a sliding hole.

[0016] Furthermore, the bottom of the water inlet pipe is set lower than that of the steam return pipe.

[0017] Furthermore, a condensate drain pipe is fixedly connected to the bottom of the tank, and a first control valve is fixedly connected to the condensate drain pipe.

[0018] A steam generator with a secondary heating structure includes a water storage tank, the top of which is fixedly connected to an outlet pipe;

[0019] The side wall of the water storage tank is connected to a descaling water supply assembly for adding water or circulating and removing sludge;

[0020] The descaling water supply unit includes a water supply component and a return water filter component. The input end of the water supply component is fixedly connected to the lower end of the side wall of the water storage tank. The output end of the water supply component is fixedly connected to a steam generator box, and the bottom of the steam generator box is fixedly connected to the water inlet end of the return water filter component. The output end of the return water filter component is connected to the water supply component.

[0021] An electric heating wire for heating is fixedly installed on the inner wall of the steam generator, and a steam outlet pipe for steam discharge and a water level monitoring component for water level monitoring are fixedly connected to the top of the steam generator.

[0022] Furthermore, the water supply assembly includes a water pump, a second pipe, a third pipe, a first three-way valve, and a seventh pipe. The third pipe is fixedly connected to the lower end of the side wall of the water storage tank. The two sets of input ends of the first three-way valve are respectively connected to the third pipe and the return water filter assembly. The output end of the first three-way valve is fixedly connected to the seventh pipe. The seventh pipe is fixedly connected to the input end of the water pump. The output end of the water pump is fixedly connected to the second pipe, and the second pipe is fixedly connected to the upper end of the side wall of the steam generator.

[0023] Furthermore, the return water filtration assembly includes an outer filter cylinder, a first pipe, a fourth pipe, a second control valve, a bottom cover, a fifth pipe, a second three-way valve, a sixth pipe, a filter cartridge, a limiting ring, and support blocks. The fourth pipe is fixedly connected to one set of input ends of the first three-way valve. The fourth pipe is also fixedly connected to the upper end of the side wall of the outer filter cylinder. The first pipe is fixedly connected to the top of the outer filter cylinder, and the first and fifth pipes are respectively fixedly connected to the output ends of the second three-way valve. The sixth pipe is fixedly connected to the input end of the second three-way valve and is fixedly installed at the bottom of the steam generator. The bottom of the fifth pipe is fixedly connected to the lower end of the outer filter cylinder. A limiting ring is fixedly connected to the inner wall of the outer filter cylinder, and the limiting ring is located between the connection points of the fourth pipe and the outer filter cylinder and the connection points of the fifth pipe and the outer filter cylinder. The bottom of the limiting ring is in close contact with the top of the filter cartridge. The bottom of the outer filter cylinder is threadedly connected to the bottom cover, and support blocks are fixedly connected to the inner wall at equal intervals along the circumference. The tops of the support blocks are in close contact with the bottom of the filter cartridge. The second control valve is installed at the bottom of the bottom cover.

[0024] Furthermore, a pressure balancing valve for balancing the air pressure inside the water tank is fixedly connected to the top of the water tank.

[0025] This utility model has the following technical effects:

[0026] After use, the steam from the steamer enters the tank through a steam return pipe. The steam and condensate from the steam heat the spiral tube. Simultaneously, cold water enters the spiral tube through the inlet pipe of the water inlet assembly. The heated spiral tube then heats the water inside. The heated water is discharged through the outlet pipe, which helps preheat the water entering the steam generator and facilitates the reuse of heat from the steam. This significantly shortens the boiling time of the water entering the steam generator and promotes rapid steam generation, achieving energy-saving and environmentally friendly effects. The rotating drive assembly of the cleaning component drives the follow-up scraper assembly to rotate. The follow-up scraper assembly moves along the outer wall of the spiral tube, scraping away impurities to prevent them from affecting heat conduction and maximizing the absorption of heat from the steam after use.

[0027] The secondary heating structure of this utility model steam generator preheats the water into a storage tank for heat preservation. The water level monitoring component monitors the liquid level in the steam generating chamber. When the liquid level is lower than the minimum point, the return water filter component of the descaling water supply component closes. The water supply component draws the hot water stored in the storage tank into the steam generating chamber until the water level monitoring component detects that the liquid level in the steam generating chamber is higher than the maximum point, facilitating automatic water addition. After water addition, the return water filter component opens, and the water supply component draws water from the steam generating chamber into the return water filter component. The return water filter component collects the scale in the steam generating chamber and then draws the filtered water back into the steam generating chamber. This facilitates the collection of scale generated during heating, preventing scale from falling onto the electric heating wire and ensuring the heating and heat transfer efficiency of the electric heating wire. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This utility model provides a three-dimensional secondary heating structure for a steam generator. Figure 1 ;

[0030] Figure 2 This is a front view of a secondary heating structure for a steam generator according to the present invention;

[0031] Figure 3 This is a left view of a secondary heating structure for a steam generator according to the present invention.

[0032] Figure 4 This utility model provides a three-dimensional secondary heating structure for a steam generator. Figure 2 ;

[0033] Figure 5 For along Figure 3 A sectional view along the AA direction;

[0034] Figure 6 This utility model relates to a three-dimensional steam generator with a secondary heating structure. Figure 1 ;

[0035] Figure 7 This is a front view of the steam generator of this utility model, which includes a secondary heating structure for the steam generator.

[0036] Figure 8 This is a right view of the steam generator of this utility model, which includes a secondary heating structure for the steam generator.

[0037] Figure 9 For along Figure 8 BB direction sectional view;

[0038] Figure 10 This is a cross-sectional view of the water level monitoring component;

[0039] Figure 11 This is a schematic diagram of the sixth pipe and its connection structure of this utility model.

[0040] The labels in the diagram represent:

[0041] 1. Tank body 2. Steam return pipe 3. Top cover 4. Condensate drain pipe 5. First control valve 6. Water inlet assembly 61. Water inlet pipe 62. Water outlet pipe 63. Spiral pipe 7. Cleaning assembly 71. Motor 72. Straight rod 73. L-shaped push rod 74. Ring body 75. Horizontal plate 76. Scraper ring 8. Steam exhaust pipe 9. Water storage tank 10. Pressure balance valve 11. Descaling water supply assembly 111. Water pump 112. Filter outer cylinder 113. First pipe 114. Second pipe 115. Third pipe 116. First three-way valve 117. 118. Fourth pipe 119. Second control valve 1110. Bottom cover 1110. Fifth pipe 1111. Second three-way valve 1112. Sixth pipe 1113. Filter cartridge 1114. Seventh pipe 1115. Limiting ring 1116. Support block 12. Steam generator 13. Steam outlet pipe 14. Water level monitoring assembly 141. First ultrasonic receiver 142. Second ultrasonic receiver 143. Second ultrasonic transmitter 144. Mounting cylinder 145. First ultrasonic transmitter 146. Float 147. Slide rod 15. Electric heating wire. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0043] The present invention will be further described below with reference to the embodiments.

[0044] The terms "left," "right," "front," "back," "up," and "down" used in the following description refer to the orientation from the perspective of the front view.

[0045] Example 1: Please refer to Figures 1-5A secondary heating structure for a steam generator includes a tank 1;

[0046] A top cover 3 for steam discharge is fixedly connected to the top of the tank body 1;

[0047] The top cover 3 is fixedly connected to a steam exhaust pipe 8;

[0048] A steam return pipe 2 is fixedly connected to the lower end of the side wall of tank 1 for steam to enter tank 1 after use;

[0049] Steam return pipe 2 is fixedly connected to the steam exhaust hole of the oven;

[0050] The tank body 1 is connected to a water inlet assembly 6 for cold water circulation. The water inlet assembly 6 includes a water inlet pipe 61, a water outlet pipe 62 and a spiral pipe 63. The upper and lower ends of the spiral pipe 63 are respectively fixedly connected to the water outlet pipe 62 and the water inlet pipe 61, and the water inlet pipe 61 and the water outlet pipe 62 are fixedly connected to the tank body 1.

[0051] Water inlet pipe 61 is connected to an external water source;

[0052] The top of the top cover 3 is connected to a cleaning component 7, which includes a rotation drive component and a follow-up scraping component. The rotation drive component is connected to the top cover 3, and the rotation drive component is movably connected to the follow-up scraping component. The follow-up scraping component is in close contact with the spiral tube 63 and is slidably connected.

[0053] After use, the steam from the steam oven enters the tank 1 through the steam return pipe 2. The steam and condensate generated from the steam heat the spiral tube 63. Simultaneously, cold water enters the spiral tube 63 through the inlet pipe 61 of the water inlet assembly 6. The heated spiral tube 63 heats the water inside, and the heated water is discharged through the outlet pipe 62. This process helps preheat the water entering the steam generator, facilitates the reuse of heat from the steam, significantly shortens the boiling time of the water entering the steam generator, and promotes rapid heating and steam generation in a short time, achieving energy-saving and environmentally friendly effects. The rotation drive assembly of the cleaning assembly 7 drives the follow-up scraper assembly to rotate. The follow-up scraper assembly moves along the outer wall of the spiral tube 63, scraping away impurities on the outer wall of the spiral tube 63. This prevents impurities from affecting the heat conduction of the spiral tube 63 and maximizes the absorption of heat from the steam after use.

[0054] The rotation drive assembly includes a motor 71 and an L-shaped push rod 73. The motor 71 is fixedly installed on the top of the top cover 3. The drive end of the motor 71 is fixedly connected to the L-shaped push rod 73. The L-shaped push rod 73 is movably connected to the follow-up scraping assembly, and the drive end of the motor 71 is fixedly connected to the follow-up scraping assembly.

[0055] The follow-up scraping assembly includes a straight rod 72, an annular body 74, a horizontal plate 75, and a scraper ring 76. The straight rod 72 is fixedly installed at the bottom of the output end of the motor 71. The horizontal plate 75 is slidably connected to the upright part of the L-shaped push rod 73 through a sliding hole. The annular body 74 and the scraper ring 76 are fixedly connected to both ends of the horizontal plate 75, respectively. The inner wall of the annular body 74 is slidably connected to the outer wall of the straight rod 72. The horizontal plate 75 is slidably connected to the straight rod 72 through a straight hole. The scraper ring 76 is slidably connected to the outer wall of the spiral tube 63 through a spiral sliding hole.

[0056] The pitch of the spiral sliding hole of the scraper ring 76 is the same as the pitch of the spiral tube 63;

[0057] This ensures that the inner wall of the spiral sliding hole of the scraper ring 76 can always be in close contact with the spiral tube 63.

[0058] The motor 71 of the rotation drive assembly of cleaning component 7 drives the L-shaped push rod 73 and the straight rod 72 of the follow-up scraping assembly to rotate. The L-shaped push rod 73 drives the horizontal plate 75 to rotate, and the straight rod 72 guides the rotation of the annular body 74. The horizontal plate 75 drives the scraping ring 76 to rotate along the spiral tube 63. The scraping ring 76 scrapes away impurities on the outer wall of the spiral tube 63, preventing impurities on the outer wall of the spiral tube 63 from affecting the heat conduction of the spiral tube 63, and facilitating the maximum absorption of heat from water vapor after use.

[0059] The bottom of the water inlet pipe 61 is set lower than that of the steam return pipe 2;

[0060] The condensate in tank 1 with residual heat heats the lower end of the spiral tube 63, and the steam after use heats the upper end of the spiral tube 63, which is conducive to the reuse of the heat of the steam after use and the condensate containing residual heat.

[0061] A condensate drain pipe 4 is fixedly connected to the bottom of the tank body 1, and a first control valve 5 is fixedly connected to the condensate drain pipe 4.

[0062] After use, the water vapor comes into contact with the spiral tube 63 and forms condensate, which falls to the bottom of the tank 1. When it needs to be discharged, the first control valve 5 is opened and the condensate is discharged from the condensate discharge pipe 4.

[0063] Example 2: Please refer to Figures 6-11 A steam generator with a secondary heating structure includes a water storage tank 9, the top of which is fixedly connected to a water outlet pipe 62.

[0064] The side wall of the water storage tank 9 is connected to a descaling water supply assembly 11 for adding water or circulating and removing sludge;

[0065] The descaling water supply assembly 11 includes a water supply assembly and a return water filter assembly. The input end of the water supply assembly is fixedly connected to the lower end of the side wall of the water storage tank 9. The output end of the water supply assembly is fixedly connected to a steam generator 12, and the bottom of the steam generator 12 is fixedly connected to the inlet end of the return water filter assembly. The output end of the return water filter assembly is connected to the water supply assembly.

[0066] An electric heating wire 15 for heating is fixedly installed on the inner wall of the steam generating box 12, and a steam outlet pipe 13 for steam discharge and a water level monitoring component 14 for water level monitoring are fixedly connected to the top of the steam generating box 12.

[0067] The steam outlet pipe 13 is fixedly connected to the steam inlet of the oven;

[0068] After preheating, the water from the secondary heating structure of the steam generator enters the water storage tank 9 for heat preservation. The water level monitoring component 14 monitors the liquid level in the steam generating box 12. When the liquid level is lower than the lowest point, the return water filter component of the descaling water supply component 11 is closed. The water supply component draws the hot water stored in the water storage tank 9 into the steam generating box 12 until the water level monitoring component 14 detects that the liquid level in the steam generating box 12 is higher than the highest point, which facilitates automatic water addition. After water addition, the return water filter component is opened. The water supply component draws water from the steam generating box 12 into the return water filter component through the return water filter component. The return water filter component collects the scale in the steam generating box 12 and then draws the filtered water into the steam generating box 12. This facilitates the collection of scale generated during heating and prevents scale from falling onto the electric heating wire 15, thus ensuring the heating and heat transfer efficiency of the electric heating wire 15.

[0069] A pressure balancing valve 10 for balancing the air pressure inside the water storage tank 9 is fixedly connected to the top of the water storage tank 9.

[0070] The water supply assembly includes a water pump 111, a second pipe 114, a third pipe 115, a first three-way valve 116, and a seventh pipe 1114. The third pipe 115 is fixedly connected to the lower end of the side wall of the water storage tank 9. The two input ends of the first three-way valve 116 are respectively connected to the third pipe 115 and the return water filter assembly. The output end of the first three-way valve 116 is fixedly connected to the seventh pipe 1114. The seventh pipe 1114 is fixedly connected to the input end of the water pump 111. The output end of the water pump 111 is fixedly connected to the second pipe 114, and the second pipe 114 is fixedly connected to the upper end of the side wall of the steam generator 12.

[0071] The return water filtration assembly includes an outer filter cylinder 112, a first pipe 113, a fourth pipe 117, a second control valve 118, a bottom cover 119, a fifth pipe 1110, a second three-way valve 1111, a sixth pipe 1112, a filter cartridge 1113, a limiting ring 1115, and a support block 1116. The fourth pipe 117 is fixedly connected to one set of input ends of the first three-way valve 116. The fourth pipe 117 is also fixedly connected to the upper end of the side wall of the outer filter cylinder 112. The first pipe 113 is fixedly connected to the top of the outer filter cylinder 112. The first pipe 113 and the fifth pipe 1110 are respectively fixedly connected to the output ends of the second three-way valve 1111. The sixth pipe 1112 is fixedly connected to the input end of the second three-way valve 1111. The sixth pipe 1112 is fixedly installed at the bottom of the steam generator 12. The bottom of the fifth pipe 1110 is fixedly connected to the lower end of the filter outer cylinder 112. A limit ring 1115 is fixedly connected to the inner wall of the filter outer cylinder 112. The limit ring 1115 is located between the connection between the fourth pipe 117 and the filter outer cylinder 112 and the connection between the fifth pipe 1110 and the filter outer cylinder 112. The bottom of the limit ring 1115 is in close contact with the top of the filter cylinder 1113. The bottom of the filter outer cylinder 112 is threadedly connected to the bottom cover 119. Support blocks 1116 are fixedly connected at equal intervals along the circumference of the inner wall of 1119. The top of the support blocks 1116 is in close contact with the bottom of the filter cylinder 1113. A second control valve 118 is installed at the bottom of the bottom cover 119.

[0072] The top outer edge of the filter cartridge 1113 is slidably connected to the inner wall of the outer filter cartridge 112;

[0073] When the liquid level is below the minimum point, the first three-way valve 116 of the water supply component of the descaling water supply assembly 11 closes to the fourth pipe 117 of the return water filter assembly, and opens to the third pipe 115. The water pump 111 of the water supply assembly pumps the hot water stored in the water storage tank 9 through the third pipe 115 and the seventh pipe 1114 to the second pipe 114, and then through the second pipe 114 into the steam generator 12, until the water level monitoring component 14 detects that the liquid level in the steam generator 12 is higher than the maximum point, facilitating automatic water filling. After water filling, the first three-way valve 116 of the water supply assembly opens to the fourth pipe 117 of the return water filter assembly, and closes to the third pipe 115. At the same time, the second three-way valve 1111 opens to the fifth pipe 1110, and the water level in the steam generator 12... The heated water enters the outer side of the filter cylinder 112 through the sixth pipe 1112 and the fifth pipe 1110. The filter cylinder 1113 filters the water inside the filter cylinder 112. Scale is located on the outside of the filter cylinder 112. The filtered water enters the seventh pipe 1114 through the fourth pipe 117. The water pump 111 pumps the hot water stored in the water storage tank 9 to the second pipe 114 through the third pipe 115 and the seventh pipe 1114. Then, it enters the steam generating box 12 through the second pipe 114. The filter cylinder 1113 of the return water filter assembly collects the scale in the steam generating box 12 and then pumps the filtered water into the steam generating box 12. This facilitates the collection of scale generated during heating and prevents scale from falling onto the electric heating wire 15, thus ensuring the heating and heat transfer efficiency of the electric heating wire 15.

[0074] When it is necessary to clean the impurities outside the filter cartridge 1113, the second control valve 118 is opened, the second three-way valve 1111 is opened to the first pipe 113, the first three-way valve 116 of the water supply component of the descaling water supply component 11 is closed to the fourth pipe 117 of the return water filter component, and the first three-way valve 116 is connected to the third pipe 115. The water pump 111 of the water supply component draws the hot water stored in the water storage tank 9 to the second pipe 114 through the third pipe 115 and the seventh pipe 1114, and then enters the steam generator 12 through the second pipe 114. The water in the steam generator 12 enters the first pipe 113 through the sixth pipe 1112, and then sprays out from the filter cartridge 1113 to backwash the scale on the outer wall of the filter cartridge 1113. Then the bottom cover 119 discharges the scale, which can realize automatic slag discharge without manual operation.

[0075] When the filter cartridge 1113 needs to be replaced, open the bottom cover 119 and the outer filter cylinder 112. The bottom cover 119 will cause the support block 1116 to separate from the filter cartridge 1113. Take the filter cartridge 1113 out of the outer filter cylinder 112, insert the new filter cartridge 1113 into the bottom of the limiting ring 1115, and then connect the bottom cover 119 to the outer filter cylinder 112. The support block 1116 will abut against the bottom of the filter cartridge 1113 to achieve quick replacement of the filter cartridge 1113.

[0076] The water level monitoring component 14 includes a first ultrasonic receiver 141, a second ultrasonic receiver 142, a second ultrasonic transmitter 143, a mounting cylinder 144, a first ultrasonic transmitter 145, a float 146, and a sliding rod 147. The mounting cylinder 144 is fixedly installed on the top of the steam generator 12. The second ultrasonic receiver 142 and the second ultrasonic transmitter 143 are symmetrically fixedly connected to the upper end of the mounting cylinder 144, and the transmitting end of the second ultrasonic transmitter 143 is opposite to the receiving end of the second ultrasonic receiver 142. The first ultrasonic receiver 141 and the first ultrasonic transmitter 145 are symmetrically fixedly connected to the lower end of the mounting cylinder 144, and the transmitting end of the first ultrasonic transmitter 145 is opposite to the receiving end of the first ultrasonic receiver 141. The sliding rod 147 is slidably connected inside the mounting cylinder 144, and the float 146 is fixedly connected to the bottom of the sliding rod 147.

[0077] The float 146 of the water level monitoring component 14 is in contact with the water in the steam generator 12. When the water level drops, the float 146 moves downward, causing the slide bar 147 to move downward. When the top of the slide bar 147 is lower than the second ultrasonic transmitter 143 and the first ultrasonic transmitter 145, and the first ultrasonic receiver 141 receives the signal emitted by the first ultrasonic transmitter 145, and the second ultrasonic receiver 142 receives the signal emitted by the second ultrasonic transmitter 143, it indicates that the water level in the steam generator 12 is below the lowest point, indicating that water needs to be added to the steam generator 12. The descaling water supply component 11 then adds water. As the water level in the steam generator 12 rises, the float 146 moves upward, causing the slide bar 147 to move upward. The upward movement of the float 146 first blocks the signal generated by the first ultrasonic transmitter 145, and water continues to be added to the steam generator 12 until the slide bar 147 blocks the signal generated by the second ultrasonic transmitter 143. At this point, the water level is at its highest, which is convenient for detecting the water level in the steam generator 12. Compared with the existing insertion-type water temperature detection, this method has a longer service life and is more beneficial for practical use.

[0078] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A secondary heating structure for a steam generator, comprising a tank (1), characterized in that: The top of the tank (1) is fixedly connected to a top cover (3) for steam discharge; The top cover (3) is fixedly connected to a steam exhaust pipe (8); A steam return pipe (2) is fixedly connected to the lower end of the side wall of the tank (1) for steam to enter the tank (1) after use. The tank (1) is connected to a water inlet assembly (6) for cold water circulation. The water inlet assembly (6) includes a water inlet pipe (61), a water outlet pipe (62) and a spiral pipe (63). The upper and lower ends of the spiral pipe (63) are respectively fixedly connected to the water outlet pipe (62) and the water inlet pipe (61), and the water inlet pipe (61) and the water outlet pipe (62) are fixedly connected to the tank (1). The top cover (3) is connected to a cleaning component (7). The cleaning component (7) includes a rotation drive component and a follow-up scraping component. The rotation drive component is connected to the top cover (3). The rotation drive component is movably connected to the follow-up scraping component. The follow-up scraping component is in close contact with the spiral tube (63). The follow-up scraping assembly includes a straight rod (72), an annular body (74), a horizontal plate (75), and a scraper ring (76). The rotation drive assembly is fixedly connected to the top of the straight rod (72), and the horizontal plate (75) is slidably connected to the rotation drive assembly. The annular body (74) and the scraper ring (76) are fixedly connected to both ends of the horizontal plate (75). The inner wall of the annular body (74) is slidably connected to the outer wall of the straight rod (72), the horizontal plate (75) is slidably connected to the straight rod (72) through a straight hole, and the scraper ring (76) is slidably connected to the outer wall of the spiral tube (63) through a spiral sliding hole.

2. The secondary heating structure of the steam generator according to claim 1, characterized in that, The rotation drive assembly includes a motor (71) and an L-shaped push rod (73). The motor (71) is fixedly installed on the top of the top cover (3). The drive end of the motor (71) is fixedly connected to the L-shaped push rod (73). The L-shaped push rod (73) is movably connected to the follow-up scraping assembly. The drive end of the motor (71) is fixedly connected to the follow-up scraping assembly. The straight rod (72) is fixedly installed at the bottom of the output end of the motor (71). The horizontal plate (75) is slidably connected to the upright part of the L-shaped push rod (73) through a sliding hole.

3. The secondary heating structure of the steam generator according to claim 1 or 2, characterized in that, The bottom of the water inlet pipe (61) is set lower than the steam return pipe (2).

4. The secondary heating structure of the steam generator according to claim 3, characterized in that, A condensate drain pipe (4) is fixedly connected to the bottom of the tank (1), and a first control valve (5) is fixedly connected to the condensate drain pipe (4).

5. A steam generator comprising the secondary heating structure of the steam generator according to claim 4, comprising a water storage tank (9), characterized in that, The top of the water storage tank (9) is fixedly connected to the water outlet pipe (62); The side wall of the water storage tank (9) is connected to a descaling water supply assembly (11) for adding water or circulating and removing sludge. The descaling water supply assembly (11) includes a water supply assembly and a return water filter assembly. The input end of the water supply assembly is fixedly connected to the lower end of the side wall of the water storage tank (9). The output end of the water supply assembly is fixedly connected to a steam generator (12). The bottom of the steam generator (12) is fixedly connected to the inlet end of the return water filter assembly. The output end of the return water filter assembly is connected to the water supply assembly. An electric heating wire (15) for heating is fixedly installed on the inner wall of the steam generator (12), and a steam outlet pipe (13) for steam discharge and a water level monitoring component (14) for water level monitoring are fixedly connected to the top of the steam generator (12).

6. The steam generator according to claim 5, characterized in that, The water supply assembly includes a water pump (111), a second pipe (114), a third pipe (115), a first three-way valve (116), and a seventh pipe (1114). The third pipe (115) is fixedly connected to the lower end of the side wall of the water storage tank (9). The two input ends of the first three-way valve (116) are respectively connected to the third pipe (115) and the return water filter assembly. The output end of the first three-way valve (116) is fixedly connected to the seventh pipe (1114). The seventh pipe (1114) is fixedly connected to the input end of the water pump (111). The output end of the water pump (111) is fixedly connected to the second pipe (114), and the second pipe (114) is fixedly connected to the upper end of the side wall of the steam generator (12).

7. The steam generator according to claim 6, characterized in that, The return water filtration assembly includes an outer filter cylinder (112), a first pipe (113), a fourth pipe (117), a second control valve (118), a bottom cover (119), a fifth pipe (1110), a second three-way valve (1111), a sixth pipe (1112), a filter cartridge (1113), a limiting ring (1115), and a support block (1116). The fourth pipe (117) is fixedly connected to one set of input ends of the first three-way valve (116). The fourth pipe (117) is also fixedly connected to the upper end of the side wall of the outer filter cylinder (112). The first pipe (113) is fixedly connected to the top of the outer filter cylinder (112). The first pipe (113) and the fifth pipe (1110) are fixedly connected to the output ends of the second three-way valve (1111), respectively. The sixth pipe (1112) is fixedly connected to the input end of the second three-way valve (1111). The sixth pipe (1112) is fixedly installed at the bottom of the steam generator (12). The bottom of the fifth pipe (1110) is fixedly connected to the lower end of the filter outer cylinder (112). The inner wall of the filter outer cylinder (112) is fixedly connected to a limit ring (1115). The limit ring (1115) is located between the connection between the fourth pipe (117) and the filter outer cylinder (112) and the connection between the fifth pipe (1110) and the filter outer cylinder (112). The bottom of the limit ring (1115) is in close contact with the top of the filter cylinder (1113). The bottom of the filter outer cylinder (112) is threadedly connected to the bottom cover (119). The inner wall of (1119) is fixedly connected with support blocks (1116) at equal intervals along the circumference. The top of the support block (1116) is in close contact with the bottom of the filter cylinder (1113). The bottom of the bottom cover (119) is equipped with a second control valve (118).

8. The steam generator according to claim 7, characterized in that, A pressure balancing valve (10) for balancing the air pressure inside the water tank (9) is fixedly connected to the top of the water tank (9).

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