Deep boiler flue gas waste heat recovery heat pump heat pipe mechanism

Abstract

The utility model provides a deep boiler flue gas waste heat recovery heat pump heat pipe mechanism which comprises a bearing platform. The heat preservation device comprises a heat preservation box, a smoke inlet pipe and a first smoke outlet pipe; the heat recovery device comprises a heat conversion device, and the heat conversion device is installed in the heat preservation box; the input end of the waste heat collecting device is fixedly connected with the first smoke outlet pipe; the conveying device is mounted at the bottom of the waste heat collecting device; and the flat plate spray head is fixedly mounted in the heat preservation box and is positioned right above the heat conversion device. According to the deep boiler flue gas waste heat recovery heat pump heat pipe mechanism, in the working process, cleaning liquid absorbs residual temperature in boiler flue gas again, then the filtered cleaning liquid is guided into the flat plate spray head to clean soot and impurities attached to the surface of the heat pipe set, and the situation that the soot and the impurities are accumulated, and consequently the heat exchange efficiency is reduced is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of depth boiler flue gas waste heat recovery, especially depth boiler flue gas waste heat recovery heat pump heat pipe mechanism. BACKGROUND

[0002] The flue gas produced by boiler combustion contains a large amount of waste heat, which will be directly discharged into the atmosphere if not recovered, causing great waste of energy. Now heat pump heat pipe mechanism is generally used to recover the waste heat in the flue gas. By recovering the waste heat in the flue gas, this part of heat can be reused, improving the overall energy utilization efficiency.

[0003] The heat pipe of the existing waste heat recovery heat pump heat pipe mechanism directly contacts with the flue gas, and the dust and impurities contained in the flue gas are easy to adhere to the heat pipe mechanism, resulting in a decrease in the effective heat exchange area and a reduction in the heat exchange efficiency of the heat pipe. Moreover, after the flue gas passes through the heat pump heat pipe mechanism to recover heat, there will still be a part of heat left, which will lead to the loss of the remaining heat when the flue gas is discharged, causing waste.

[0004] Therefore, it is necessary to provide depth boiler flue gas waste heat recovery heat pump heat pipe mechanism to solve the above technical problems. SUMMARY

[0005] The depth boiler flue gas waste heat recovery heat pump heat pipe mechanism provided by the utility model solves the problem that the dust and impurities contained in the flue gas are easy to adhere to the heat pipe mechanism, resulting in a decrease in the effective heat exchange area and a reduction in the heat exchange efficiency of the heat pipe. Moreover, after the flue gas passes through the heat pump heat pipe mechanism to recover heat, there will still be a part of heat left, which will lead to the loss of the remaining heat when the flue gas is discharged, causing waste.

[0006] To solve the above technical problems, the depth boiler flue gas waste heat recovery heat pump heat pipe mechanism provided by the utility model comprises a bearing platform.

[0007] The heat preservation device comprises a heat preservation box, an inlet pipe and a first outlet pipe. The heat preservation box is installed on the bearing platform. One end of the inlet pipe penetrates through the heat preservation box and is installed on the heat preservation box. The other end of the inlet pipe is connected with the smoke outlet of the boiler for guiding the high-temperature flue gas into the heat preservation box. The first outlet pipe is installed on the heat preservation box.

[0008] The heat recovery device comprises a liquid inlet pipe, a liquid outlet pipe and a heat conversion device. The heat conversion device is installed in the heat preservation box. The liquid inlet pipe is installed on one side of the heat conversion device for guiding the heated medium into the heat conversion device. The liquid outlet pipe is installed on the other side of the heat conversion device for guiding the heated medium out of the heat conversion device.

[0009] A waste heat collecting device is arranged on one side of the bearing platform, and an input end of the waste heat collecting device is fixedly connected with the first smoke outlet pipe;

[0010] A conveying device is installed at the bottom of the waste heat collecting device;

[0011] A flat spray head is fixedly installed in the heat preservation box and located directly above the heat conversion device, and an input end of the flat spray head is fixedly connected with an output end of the conveying device.

[0012] Preferably, the heat conversion device comprises a liquid inlet pipe, a heat pipe group and a liquid outlet pipe, one end of the liquid inlet pipe is installed on one side of the heat pipe group, the other end of the liquid inlet pipe is connected with the liquid inlet pipe, one end of the liquid outlet pipe is installed on the other side of the heat pipe group, and the other end of the liquid outlet pipe is connected with the liquid outlet pipe.

[0013] Preferably, the waste heat collecting device comprises a recovery bucket and a U-shaped connecting pipe, the recovery bucket is placed on one side of the bearing platform, one end of the U-shaped connecting pipe is fixedly connected with the first smoke outlet pipe, and the other end of the U-shaped connecting pipe penetrates through the side wall of the recovery bucket and is inserted into the recovery bucket.

[0014] Preferably, the waste heat collecting device further comprises a filter screen installed in the recovery bucket.

[0015] Preferably, the heat preservation device further comprises a drain pipe and a valve, the drain pipe is installed at the bottom of the heat preservation box and penetrates through the bearing platform, and the valve is installed in the drain pipe.

[0016] Preferably, the conveying device comprises a mounting box, a water pump, a water suction pipe and a water delivery pipe, the mounting box is fixedly installed at the bottom of the recovery bucket, the water pump is installed in the mounting box, one end of the water suction pipe is installed on an input end of the water pump, the other end of the water suction pipe penetrates through the recovery bucket, one end of the water delivery pipe is installed on an output end of the water pump, and the other end of the water delivery pipe penetrates through the heat preservation box and is connected with an input end of the flat spray head.

[0017] Preferably, the deep boiler flue gas waste heat recovery heat pump heat pipe mechanism further comprises an adjusting device, the adjusting device comprises a protection box, a motor, a first gear and a second gear, the protection box is installed on one side of the heat preservation box, the motor is installed in the protection box, an output end of the motor is provided with the first gear, the second gear is installed on the liquid inlet pipe, and the first gear and the second gear are meshingly connected.

[0018] Compared with the related art, the deep boiler flue gas waste heat recovery heat pump heat pipe mechanism has the following beneficial effects:

[0019] The deep boiler flue gas waste heat recovery heat pump heat pipe mechanism provided by the utility model has the advantages that when working, most of the heat in the boiler flue gas is absorbed, the boiler flue gas is guided into the recovery barrel through the U-shaped connecting pipe, the cleaning liquid absorbs the temperature in the boiler flue gas again, meanwhile, part of the smoke dust and impurities in the boiler flue gas are absorbed and captured by the cleaning liquid, when the heat pipe group is cleaned, the water pump is started, the filtered cleaning liquid is guided into the flat plate spray head through the water delivery pipe, the soot and impurities adhered to the surface of the heat pipe group are cleaned, the accumulation of soot on the surface of the heat pipe group is avoided, the heat exchange efficiency is reduced, meanwhile, when the cleaning liquid with relatively high temperature is sprayed, the impact on the heat pipe group can be reduced, the strength and toughness of the heat pipe group are not affected. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 The structure schematic view of a preferred embodiment of the deep boiler flue gas waste heat recovery heat pump heat pipe mechanism provided by the utility model is shown in the figure.

[0021] Figure 2 The front view sectional schematic view of the heat preservation device of the utility model is shown in the figure.

[0022] Figure 3 The side view sectional schematic view of the heat preservation device of the utility model is shown in the figure.

[0023] Figure 4 The front view sectional schematic view of the waste heat collection device of the utility model is shown in the figure.

[0024] Figure 5 The structure schematic view of another preferred embodiment of the utility model is shown in the figure.

[0025] Figure 6 The side view sectional schematic view of the adjusting device of another preferred embodiment of the utility model is shown in the figure.

[0026] Reference numerals in the figure:

[0027] 1, bearing platform;

[0028] 2, heat preservation device; 21, heat preservation box; 22, smoke inlet pipe; 23, first smoke outlet pipe; 24, drain pipe; 241, valve;

[0029] 3, heat recovery device; 31, liquid delivery pipe; 32, liquid discharge pipe; 33, heat conversion device; 331, liquid inlet pipe; 332, heat pipe group; 333, liquid outlet pipe;

[0030] 4, waste heat collection device; 41, recovery barrel; 42, U-shaped connecting pipe; 43, second smoke outlet pipe; 44, filter screen;

[0031] 5, conveying device; 51, mounting box; 52, water pump; 53, water suction pipe; 54, water delivery pipe;

[0032] 6, flat plate nozzle;

[0033] 7, adjusting device; 71, protection box; 72, motor; 73, first gear; 74, second gear. DETAILED DESCRIPTION

[0034] The utility model will be further explained in connection with the drawings and embodiments.

[0035] First embodiment

[0036] Please refer to Figure 1 、 Figure 2 、 Figure 3 And Figure 4 , the depth boiler flue gas waste heat recovery heat pump heat pipe mechanism, include: bearing platform 1;

[0037] Heat preservation device 2, the heat preservation device 2 includes heat preservation box 21, smoke inlet pipe 22 and first smoke outlet pipe 23, the heat preservation box 21 is installed on the bearing platform 1, one end of the smoke inlet pipe 22 is installed on the heat preservation box 21 after penetrating the heat preservation box 21, the other end of the smoke inlet pipe 22 is connected with the smoke outlet of boiler, for the high-temperature flue gas is guided into the heat preservation box 21, the first smoke outlet pipe 23 is installed on the heat preservation box 21;

[0038] Heat recovery device 3, the heat recovery device 3 includes infusion tube 31, liquid discharge pipe 32 and heat conversion device 33, the heat conversion device 33 is installed in the heat preservation box 21, the infusion tube 31 is installed on one side of the heat conversion device 33, for the heated medium is guided into the heat conversion device 33, the liquid discharge pipe 32 is installed on the other side of the heat conversion device 33, for the medium after heating is guided from the heat conversion device 33 inside;

[0039] Waste heat collection device 4, the waste heat collection device 4 is arranged on one side of the bearing platform 1, and the input end of the waste heat collection device 4 is fixedly connected with the first smoke outlet pipe 23;

[0040] Conveying device 5, the conveying device 5 is installed at the bottom of the waste heat collection device 4;

[0041] Flat plate nozzle 6, the flat plate nozzle 6 is fixedly installed in the heat preservation box 21, and is located directly above the heat conversion device 33, and the input end of the flat plate nozzle 6 is fixedly connected with the output end of the conveying device 5;

[0042] In the present embodiment, when heat is recovered, high-temperature boiler flue gas is introduced into the heat preservation box 21 from the smoke inlet pipe 22, and the heat absorption working medium is introduced into the heat conversion device 33 from the liquid conveying pipe 31. The high-temperature flue gas fills the heat preservation box 21, and the working medium absorbs the heat of the high-temperature flue gas in the heat conversion device 33. Then, the working medium is discharged through the liquid discharge pipe 32. The working medium that has absorbed heat is processed subsequently. Most of the heat in the boiler flue gas is absorbed and discharged from the first smoke outlet pipe 23 into the waste heat collection device 4. The waste heat collection device 4 contains cleaning liquid. The cooled flue gas is directly introduced into the cleaning liquid. The cleaning liquid further absorbs the waste heat in the boiler flue gas. When the smoke inlet pipe 22 stops introducing boiler flue gas and the flue gas in the heat preservation box 21 is completely discharged, the conveying device 5 is started to convey the cleaning liquid that has absorbed waste heat in the waste heat collection device 4 to the flat spray head 6. The cleaning liquid is sprayed onto the surface of the heat conversion device 33 to clean the soot and impurities attached to the surface, thereby preventing the soot from accumulating on the surface of the heat conversion device 33 and reducing the heat exchange efficiency. At the same time, the use of cleaning liquid with relatively high temperature can reduce the impact on the heat conversion device 33, thereby avoiding affecting the strength and toughness of the heat conversion device 33.

[0043] Please refer to Figure 2 and Figure 3 , the heat conversion device 33 includes a liquid inlet pipe 331, a heat pipe group 332, and a liquid outlet pipe 333. One end of the liquid inlet pipe 331 is installed on one side of the heat pipe group 332. The other end of the liquid inlet pipe 331 is connected to the liquid conveying pipe 31. One end of the liquid outlet pipe 333 is installed on the other side of the heat pipe group 332. The other end of the liquid outlet pipe 333 is connected to the liquid discharge pipe 32.

[0044] When the high-temperature boiler flue gas is introduced into the heat preservation box 21 for heat recovery, the heat absorption working medium is introduced into the liquid inlet pipe 331 from the liquid conveying pipe 31. The heat pipe group 332 is contacted with the high-temperature boiler flue gas, and the heat is transferred to the inside of the heat pipe group 332. The working medium absorbs the heat in the heat pipe group 332. The working medium that has absorbed heat is discharged from the liquid outlet pipe 333 and the liquid discharge pipe 32 for subsequent processing, thereby achieving the purpose of recovering the heat in the high-temperature boiler flue gas.

[0045] Please refer to Figure 1 and Figure 4 , the waste heat collection device 4 includes a recovery barrel 41 and a U-shaped connecting pipe 42. The recovery barrel 41 is placed on one side of the bearing platform 1. One end of the U-shaped connecting pipe 42 is fixedly connected to the first smoke outlet pipe 23. The other end of the U-shaped connecting pipe 42 penetrates through the side wall of the recovery barrel 41 and is inserted into the recovery barrel 41.

[0046] The top of the recovery bucket 41 is provided with a second smoke outlet pipe 43. When the heat pipe group 332 absorbs the heat in the high-temperature boiler flue gas, the boiler flue gas is discharged from the first smoke outlet pipe 23, introduced into the recovery bucket 41 through the U-shaped connecting pipe 42, and the recovery bucket 41 is pre-stored with cleaning liquid. One end of the U-shaped connecting pipe 42 is inserted into the cleaning liquid. When the boiler flue gas is introduced into the cleaning liquid through the U-shaped connecting pipe 42, the cleaning liquid absorbs the residual temperature in the boiler flue gas again, heats the cleaning liquid, and at the same time, part of the soot and impurities in the boiler flue gas are absorbed and captured by the cleaning liquid. The flue gas introduced into the cleaning liquid floats upwards and is discharged through the second smoke outlet pipe 43 for further treatment. When the heated cleaning liquid is sprayed and cleaned, the temperature difference between the cleaning liquid and the heat pipe group 332 is reduced, so that the high temperature difference does not cause the strength and toughness of the heat pipe group 332 to decrease, thereby reducing the influence on the heat pipe group 332.

[0047] Please refer to Figure 4 , the waste heat collection device 4 further comprises a filter screen 44, and the filter screen 44 is installed in the recovery bucket 41;

[0048] In use, the filter screen 44 is installed at the bottom of the recovery bucket 41, and the input end of the conveying device 5 is located below the filter screen 44. When the conveying device 5 pumps out the cleaning liquid in the recovery bucket 41, the filter screen 44 filters the soot and impurities in the cleaning liquid. When the heat pipe group 332 is sprayed and cleaned, the soot and impurities in the cleaning liquid do not cause secondary pollution to the heat pipe group 332.

[0049] Please refer to Figure 2 and Figure 3 , the heat preservation device 2 further comprises a drain pipe 24 and a valve 241, the drain pipe 24 is installed at the bottom of the heat preservation box 21 and penetrates through the bearing platform 1, and the valve 241 is installed inside the drain pipe 24;

[0050] When the high-temperature flue gas is introduced into the heat preservation box 21, the valve 241 is closed to prevent the high-temperature flue gas from leaking out. When the heat pipe group 332 is sprayed and cleaned with cleaning liquid, the valve 241 is opened to discharge the cleaning liquid containing soot and impurities, so as to avoid accumulation in the heat preservation box 21 and affect the work of the subsequent heat pipe group 332.

[0051] Please refer to Figure 1 and Figure 4The conveying device 5 comprises a mounting box 51, a water pump 52, a water suction pipe 53 and a water delivery pipe 54, the mounting box 51 is fixedly installed at the bottom of the recovery barrel 41, the water pump 52 is installed in the mounting box 51, one end of the water suction pipe 53 is installed on the input end of the water pump 52, the other end of the water suction pipe 53 penetrates through the recovery barrel 41, one end of the water delivery pipe 54 is installed on the output end of the water pump 52, and the other end of the water delivery pipe 54 is connected with the input end of the flat plate spray head 6 after penetrating through the heat preservation box 21.

[0052] In use, the water suction pipe 53 is inserted into the bottom of the recovery barrel 41 and located below the filter screen 44, when it is required to spray and clean the heat pipe group 332, the water pump 52 is started, the filtered cleaning liquid is drawn out from the recovery barrel 41 and introduced into the flat plate spray head 6 through the water delivery pipe 54, so that the heat pipe group 332 is sprayed and cleaned.

[0053] Second embodiment

[0054] Please refer to Figure 5 and Figure 6 The deep boiler flue gas waste heat recovery heat pump heat pipe mechanism further comprises an adjusting device 7, the adjusting device 7 comprises a protection box 71, a motor 72, a first gear 73 and a second gear 74, the protection box 71 is installed at one side of the heat preservation box 21, the motor 72 is installed in the protection box 71, the output end of the motor 72 is provided with the first gear 73, the second gear 74 is installed on the liquid inlet pipe 331, and the first gear 73 and the second gear 74 are in meshing connection.

[0055] In use, since the heat pipe group 332 is arranged in a rectangular array, when the flat plate spray head 6 sprays cleaning liquid, the cleaning liquid is not easy to spray to the heat pipes located in the interior and the bottom of the heat pipes, and the cleaning effect is reduced. In the embodiment, the liquid inlet pipe 331 and the liquid delivery pipe 31 are rotationally connected, the liquid outlet pipe 333 and the liquid discharge pipe 32 are rotationally connected, the motor 72 is arranged to perform reciprocating motion, when spraying and cleaning, the motor 72 is started, the output end drives the first gear 73 to move, the first gear 73 drives the second gear 74 to move, the second gear 74 drives the liquid inlet pipe 331 to move, and the liquid inlet pipe 331 drives the heat pipe group 332 and the liquid outlet pipe 333 to move, so that the heat pipe group 332 is inclined, when the heat pipe group 332 is inclined to a certain angle, the output end of the motor 72 is reversely rotated, the effect that the heat pipe group 332 is shaken left and right is realized, when the heat pipe group 332 is inclined, the sprayed cleaning liquid can clean the heat pipes located in the interior of the heat pipe group 332 and the bottom of the heat pipes, and a better cleaning effect is achieved.

[0056] The working principle of the deep boiler flue gas waste heat recovery heat pump heat pipe mechanism is as follows:

[0057] When working, the high-temperature boiler flue gas is introduced into the heat preservation box 21 from the smoke inlet pipe 22, the heat absorption working medium is introduced into the liquid inlet pipe 331 from the liquid inlet pipe 31, and when the heat pipe group 332 contacts the high-temperature boiler flue gas, heat is transferred to the inside of the heat pipe group 332, the working medium absorbs heat in the heat pipe group 332, and the working medium that has absorbed heat is discharged from the liquid outlet pipe 333 and the liquid discharge pipe 32. After most of the heat in the boiler flue gas is absorbed, the boiler flue gas is discharged from the first smoke outlet pipe 23 and introduced into the recovery barrel 41 through the U-shaped connecting pipe 42. The recovery barrel 41 is pre-stored with cleaning liquid, one end of the U-shaped connecting pipe 42 is inserted into the cleaning liquid, and when the boiler flue gas is introduced into the cleaning liquid through the U-shaped connecting pipe 42, the cleaning liquid absorbs the temperature remaining in the boiler flue gas again, and the cleaning liquid is heated at the same time. Part of the smoke dust and impurities in the boiler flue gas are absorbed and captured by the cleaning liquid. When the smoke inlet pipe 22 stops introducing the boiler flue gas and the smoke in the heat preservation box 21 is completely discharged, the water pump 52 is started to pump the cleaning liquid filtered by the filter screen 44 out of the recovery barrel 41 and into the flat plate spray head 6 through the water inlet pipe 54 to clean the soot and impurities attached to the surface of the heat pipe group 332, avoiding the accumulation of soot on the surface of the heat pipe group 332, which reduces the heat exchange efficiency. At the same time, the use of relatively high-temperature cleaning liquid can reduce the impact on the heat pipe group 332, avoiding affecting the strength and toughness of the heat pipe group 332. The motor 72, the first gear 73 and the second gear 74 are arranged. When spraying and cleaning, the motor 72 is started, the output end drives the first gear 73 to move, the first gear 73 drives the second gear 74 to move, the second gear 74 drives the liquid inlet pipe 331 to move, and the liquid inlet pipe 331 drives the heat pipe group 332 and the liquid outlet pipe 333 to move, so that the heat pipe group 332 is inclined. When the heat pipe group 332 is inclined to a certain angle, the output end of the motor 72 is reversely rotated to realize the effect of left and right shaking of the heat pipe group 332. When the heat pipe group 332 is inclined, the sprayed cleaning liquid can clean the heat pipes and the bottom of the heat pipes inside the heat pipe group 332, achieving better cleaning effect.

[0058] The above is only an embodiment of the present application, and does not limit the patent range of the present application. Any equivalent structure or equivalent process transformation obtained by using the content of the present application specification and drawings, or direct or indirect application in other related technical fields, is also included in the patent protection range of the present application.

Claims

1. A deep boiler flue gas waste heat recovery heat pump heat pipe mechanism, characterized in that, The utility model relates to a deep boiler flue gas waste heat recovery heat pump heat pipe mechanism, including: a bearing platform; a heat preservation device including a heat preservation box, a smoke inlet pipe and a first smoke outlet pipe, the heat preservation box is installed on the bearing platform, one end of the smoke inlet pipe is installed on the heat preservation box after penetrating through the heat preservation box, the other end of the smoke inlet pipe is connected with the smoke outlet of the boiler, is used for guiding high-temperature flue gas into the heat preservation box, and the first smoke outlet pipe is installed on the heat preservation box; a heat recovery device including a liquid inlet pipe, a liquid outlet pipe and a heat conversion device, the heat conversion device is installed in the heat preservation box, the liquid inlet pipe is installed on one side of the heat conversion device, is used for guiding the heated medium into the heat conversion device, and the liquid outlet pipe is installed on the other side of the heat conversion device, is used for guiding the heated medium from the heat conversion device; a waste heat collection device is arranged on one side of the bearing platform, and the input end of the waste heat collection device is fixedly connected with the first smoke outlet pipe; a conveying device is installed at the bottom of the waste heat collection device; a flat plate nozzle is fixedly installed in the heat preservation box and located directly above the heat conversion device, and the input end of the flat plate nozzle is fixedly connected with the output end of the conveying device.

2. The deep boiler flue gas waste heat recovery heat pump heat pipe mechanism according to claim 1, characterized in that, The heat conversion device includes a liquid inlet pipe, a heat pipe group and a liquid outlet pipe, one end of the liquid inlet pipe is installed on one side of the heat pipe group, the other end of the liquid inlet pipe is connected with the liquid inlet pipe, one end of the liquid outlet pipe is installed on the other side of the heat pipe group, and the other end of the liquid outlet pipe is connected with the liquid outlet pipe.

3. The deep boiler flue gas waste heat recovery heat pump heat pipe mechanism according to claim 1, characterized in that, The waste heat collection device includes a recovery barrel and a U-shaped connecting pipe, the recovery barrel is placed on one side of the bearing platform, one end of the U-shaped connecting pipe is fixedly connected with the first smoke outlet pipe, and the other end of the U-shaped connecting pipe is inserted into the recovery barrel after penetrating through the side wall of the recovery barrel.

4. The deep boiler flue gas waste heat recovery heat pump heat pipe mechanism according to claim 3, characterized in that, The waste heat collection device further includes a filter screen installed in the recovery barrel.

5. The deep boiler flue gas waste heat recovery heat pump heat pipe mechanism according to claim 1, characterized in that, The heat preservation device further includes a drain pipe and a valve, the drain pipe is installed at the bottom of the heat preservation box and penetrates through the bearing platform, and the valve is installed in the drain pipe.

6. The deep boiler flue gas waste heat recovery heat pump heat pipe mechanism according to claim 3, characterized in that, The conveying device includes a mounting box, a water pump, a water suction pipe and a water delivery pipe, the mounting box is fixedly installed at the bottom of the recovery barrel, the water pump is installed in the mounting box, one end of the water suction pipe is installed on the input end of the water pump, the other end of the water suction pipe penetrates through the recovery barrel, one end of the water delivery pipe is installed on the output end of the water pump, and the other end of the water delivery pipe penetrates through the heat preservation box and is connected with the input end of the flat plate nozzle.

7. The deep boiler flue gas waste heat recovery heat pump heat pipe mechanism according to claim 2, characterized in that, The deep boiler flue gas waste heat recovery heat pump heat pipe mechanism further includes an adjusting device, the adjusting device includes a protection box, a motor, a first gear and a second gear, the protection box is installed on one side of the heat preservation box, the motor is installed in the protection box, the output end of the motor is provided with the first gear, the second gear is installed on the liquid inlet pipe, and the first gear and the second gear are meshingly connected.

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