Heater with cleaning device

Abstract

The utility model discloses a heater with a cleaning device, the heater is provided with a heating pipe, the cleaning device comprises a dry ice spraying device, the spraying opening of the dry ice spraying device faces the heating pipe, and the dry ice spraying device is used for spraying dry ice to the heating pipe; the output end of the ultrasonic device faces the heating pipe, and the output end of the ultrasonic device transmits ultrasonic waves into the dry ice medium sprayed by the dry ice spraying device. According to the utility model, stains are cleaned in a manner of spraying dry ice and superposing ultrasonic waves, the dry ice can effectively remove oil stains and impurities at low temperature, chemical solvents are not needed, the environment is not polluted, residues are not generated after sublimation, and the cleanliness of the heater is ensured; and high-frequency vibration of the ultrasonic waves can not only vibrate out stains in gaps of the heater, but also promote the reaction between the dry ice and the stains, so that the cleaning effect of the cleaning device is further improved.

Description

Technical Field

[0001] The utility model belongs to the field of dust removal of tobacco heaters, in particular to a heater with a cleaning device. Background Art

[0002] Heaters are often used in tobacco production and processing, such as feeder rehumidifiers used to rehumidify and heat tobacco. The heating tubes are provided with multiple groups of fins for heat dissipation, and in order to increase the heat dissipation area, the fins are often provided with folds. These heaters work for a long time in a circulating air environment, and tobacco oil and dust will accumulate on the fins. The fins of the heaters are numerous and have many folds, making it very difficult to clean the stains attached to them. Therefore, there is a need for an economical, environmentally friendly, and effective cleaning device to clean the heaters.

[0003] In view of this, the present utility model is proposed. Utility Model Content

[0004] The utility model provides a heater with a cleaning device to achieve the purpose of efficiently and thoroughly cleaning the heater.

[0005] In order to achieve the above-mentioned purpose, the basic concept of the technical solution adopted by the utility model is:

[0006] A heater with a cleaning device is provided, wherein a heating tube is installed, and the cleaning device comprises:

[0007] A dry ice blasting device, the blasting port of which is arranged toward the heating tube, and is used for blasting dry ice toward the heating tube;

[0008] The ultrasonic device has an output end disposed toward the heating tube, and the output end transmits ultrasonic waves to the dry ice medium sprayed by the dry ice spraying device.

[0009] Preferably, the heater has a mounting frame, the heating tube is arranged in a frame opening of the mounting frame, and the dry ice blasting device and the ultrasonic device are arranged at the edge of the frame opening of the mounting frame and are located on one side or both sides of the heating tube.

[0010] Preferably, the mounting frame has upper and lower frame bars and left and right frame bars arranged relatively to each other, the heating tube is extended from the upper frame bar toward the lower frame bar, and the dry ice blasting device and the ultrasonic device are arranged on the left frame bar side and / or the right frame bar side.

[0011] Preferably, the dry ice blasting device and the ultrasonic device are arranged on at least one of the left and right frame bars, at least two ultrasonic devices are arranged on a single frame bar, and the dry ice blasting device is arranged between adjacent ultrasonic devices.

[0012] Preferably, the ultrasonic device is provided at the upper and lower ends of the left and right frame bars, respectively, and the dry ice blasting device is provided at the middle area of ​​the left and right frame bars, respectively.

[0013] Preferably, the dry ice blasting device comprises a nozzle, a mixing chamber is formed inside the nozzle, an air inlet and a jet port communicating with the inside and outside of the mixing chamber are respectively provided at both ends of the nozzle, a diverter is provided at the jet port end in the mixing chamber, and a gap is provided between the outer edge of the diverter and the side wall of the mixing chamber.

[0014] Preferably, the flow divider is arranged to gradually contract from the injection port end toward the inner side of the mixing chamber.

[0015] Preferably, the nozzle is a tubular structure, the mixing chamber is formed inside the tubular structure, and the flow divider is coaxially arranged with the tubular structure.

[0016] Preferably, a dry ice inlet is formed in an opening on the side wall of the nozzle and extends in a direction away from the injection port end;

[0017] After the air and the dry ice enter the mixing chamber through the air inlet and the dry ice inlet respectively, the dry ice is driven by the air and ejected from the ejection port.

[0018] Preferably, the cleaning device further comprises a controller, and the controller is respectively connected to the dry ice blasting device and the ultrasonic device;

[0019] The controller controls the dry ice blasting device to blast dry ice onto the heating tube, and controls the ultrasonic device to transmit ultrasonic waves into the dry ice medium during the blasting process of the dry ice and / or after the dry ice is blasted onto the heating tube.

[0020] After adopting the above technical scheme, the utility model has the following beneficial effects compared with the prior art.

[0021] (1) The utility model provides a heater with a cleaning device, which cleans stains by spraying dry ice and superimposing ultrasonic waves. Dry ice can effectively remove oil stains and impurities at low temperatures, and does not require the use of chemical solvents, causing zero pollution to the environment. At the same time, no residue is generated after sublimation, thereby ensuring the cleanliness of the heater. The high-frequency vibration of the ultrasonic wave can not only shake out the stains in the gaps of the heater, but also promote the reaction between the dry ice and the stains, further improving the cleaning effect of the cleaning device.

[0022] (2) The heater with a cleaning device provided by the utility model can ensure that the cleaning device has sufficient spraying and transmission space to avoid being blocked by the components of the heating tube and affecting the cleaning effect; and can realize the spraying of dry ice onto the heating tube from multiple directions to avoid the generation of sanitary dead corners.

[0023] (3) The heater with a cleaning device provided by the utility model can increase the spraying area of ​​the nozzle, reduce the number of nozzles, and reduce costs; and can also avoid the spraying range of the nozzle failing to cover all heating tubes, thereby ensuring the cleaning effect.

[0024] (4) The heater with a cleaning device provided by the utility model can ensure that the impact force does not decay when the air enters the mixing chamber of the nozzle, ensure the pressure during injection, and improve the cleaning effect of the heater.

[0025] (5) The heater with a cleaning device provided by the utility model can accurately control the operation of each part by setting a controller to ensure that the parts work together to achieve the best cleaning effect; it also reduces the manpower burden and saves human resources; it avoids negligence and omissions that may be caused by manpower, and improves the cleaning quality and cleaning efficiency.

[0026] The specific implementation of the utility model is further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation on the present invention. Obviously, the accompanying drawings described below are only some embodiments. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without creative work. In the accompanying drawings:

[0028] Figure 1 It is a schematic diagram of the heater of the utility model;

[0029] Figure 2 It is a schematic diagram of the left frame bar or the right frame bar of the heater of the utility model;

[0030] Figure 3 It is a schematic diagram of the dry ice blasting device of the utility model;

[0031] Figure 4 It is a structural schematic diagram of the heater of the utility model.

[0032] In the figure: 1. dry ice blasting device; 2. ultrasonic device; 3. heating tube; 4. left frame bar; 5. right frame bar; 6. upper frame bar; 7. lower frame bar; 8. nozzle; 9. air inlet; 10. injection port; 11. mixing chamber; 12. diverter; 13. dry ice inlet; 14. high-pressure air source; 15. filter; 16. pressure regulating valve; 17. dry ice storage tank.

[0033] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but rather to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. The following embodiments are used to illustrate the utility model but are not used to limit the scope of the utility model.

[0035] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0036] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] Heaters are often used in tobacco production and processing, such as feeder rehumidifiers used to rehumidify and heat tobacco. The heating tubes are equipped with multiple sets of fins for heat dissipation, and the fins are often wrinkled to increase the heat dissipation area. These heaters work for a long time in a circulating air environment, and tobacco oil and dust will accumulate on the fins. The large number and wrinkles of the heater fins make it very difficult to clean the stains attached to them.

[0038] Therefore, in order to be able to clean the heater efficiently and thoroughly, the utility model provides a heater with a cleaning device, wherein the heater is provided with a heating tube 3, and the heating tube 3 is provided with heat dissipation fins.

[0039] Specifically, the heater is equipped with a plurality of heating tubes 3 , and in order to increase the heat dissipation area, the heating tubes 3 are provided with a plurality of groups of heat dissipation fins which are arranged in a circular and superimposed manner around the heating tubes 3 .

[0040] In order to clean the heating tube 3 of the heater, the cleaning device comprises: a dry ice blasting device 1 , wherein the blasting port 10 is arranged toward the heating tube 3 and is used for blasting dry ice toward the heating tube 3 .

[0041] However, since the heat dissipation fins of the heater have many wrinkles, the sprayed dry ice may not be able to fully contact the stains on all parts, resulting in sanitary dead corners. At the same time, some of the sprayed dry ice may have large particles, making it difficult to have a good cleaning effect on the stains.

[0042] Therefore, in order to enhance the cleaning effect of dry ice on stains, the cleaning device also includes:

[0043] The ultrasonic device 2 has an output end for outputting ultrasonic waves, and the output end is arranged toward the heating tube 3 to transmit the ultrasonic waves to the dry ice medium sprayed by the dry ice spraying device 1 .

[0044] When using dry ice for cleaning, after the dry ice is sprayed onto the area to be cleaned, it collides with the surface of the area to be cleaned. Due to the low temperature of the dry ice, the area to be cleaned will shrink when it is cooled. The stains on the area to be cleaned will also become brittle when they are cooled. The bonding effect between the surface of the area to be cleaned and the stains will be weakened and create gaps, thereby causing the stains to be peeled off the surface of the area to be cleaned.

[0045] Therefore, dry ice has a good cleaning effect on the heat sink fins, reducing a lot of cleaning and maintenance work, especially reducing the manpower consumption caused by disassembling and installing equipment, greatly saving human resource costs; and the hardness of dry ice is lower than that of most industrial materials, and it is non-corrosive, and will not corrode or wear the heat sink fins, avoiding damage to the equipment; when using dry ice for cleaning, no chemical solvents are required, and there is zero pollution to the environment. After spraying, it directly sublimates into gas without producing residue, ensuring the cleanliness of the heater, which is safe, economical and environmentally friendly.

[0046] Ultrasonic waves are further output to the dry ice. The high-frequency vibration of the ultrasonic waves can not only shake out the stains in the gaps of the heater, but also further crush the ejected dry ice particles and promote the reaction between the dry ice and the stains, thereby significantly improving the cleaning effect of the cleaning device.

[0047] To ensure that the cleaning device has the best cleaning effect, the spraying range of the dry ice blasting device 1 covers all the heating tubes 3 , and the ultrasonic action range of the ultrasonic device 2 covers the spraying range of the dry ice blasting device 1 .

[0048] like Figure 1 As shown, the heater has a mounting frame, the heating tube 3 is arranged in the frame opening of the mounting frame, and the dry ice blasting device 1 and the ultrasonic device 2 are arranged at the edge of the frame opening of the mounting frame.

[0049] Optionally, the dry ice blasting device 1 and the ultrasonic device 2 are located on one side or both sides of the heating tube 3 .

[0050] Since the gaps between the heating tubes 3 are small, there may be no installation space. In order to allow the dry ice blasting and ultrasonic output of the cleaning device to have a larger spraying and output space, and to avoid being blocked by the heating tube 3 just after spraying or outputting, the heating tube 3 and the cleaning device are respectively arranged at different positions of the installation frame. Specifically, the installation frame has an upper frame bar 6 and a lower frame bar 7 and a left frame bar 4 and a right frame bar 5 arranged relatively. The heating tube 3 extends from the upper frame bar 6 to the lower frame bar 7, and the two ends of the heating tube 3 are respectively connected to the upper frame bar 6 and the lower frame bar 7; the dry ice blasting device 1 and the ultrasonic device 2 are arranged on the left frame bar 4 side or the right frame bar 5 side, or the dry ice blasting device 1 and the ultrasonic device 2 are arranged on the left frame bar 4 side and the right frame bar 5 side at the same time.

[0051] In order to fix the cleaning device, the dry ice blasting device 1 and the ultrasonic device 2 are both arranged on the mounting frame. Preferably, the dry ice blasting device 1 and the ultrasonic device 2 are at least arranged on any one of the left and right frame bars 5.

[0052] In order to ensure that the ultrasonic action range of the ultrasonic device 2 covers the spraying range of the dry ice blasting device 1 , at least two ultrasonic devices 2 are arranged on a single side frame bar, and the dry ice blasting device 1 is arranged between adjacent ultrasonic devices 2 .

[0053] like Figure 2 As shown, the most preferred solution is that ultrasonic devices 2 are respectively provided at the upper and lower ends of the left and right frame bars 5, and two ultrasonic devices 2 are respectively provided at the upper and lower ends of each frame bar, and the two ultrasonic devices 2 are located at the same horizontal height; dry ice blasting devices 1 are respectively provided in the middle areas of the left and right frame bars 5, and two dry ice blasting devices 1 are respectively provided in the middle areas of each frame bar, and the two dry ice blasting devices 1 are located at the same horizontal height.

[0054] Dry ice blasting devices 1 are arranged on both sides of the heating tube 3, so that dry ice can be blasted in multiple directions on the heating tube 3, and multiple ultrasonic devices 2 are arranged around the dry ice blasting devices 1, so that the ultrasonic action range of the ultrasonic devices 2 covers the blasting range of the dry ice blasting devices 1. The above arrangements effectively ensure the cleaning effect of the cleaning device on the heating tube 3, and reduce the generation of sanitary dead corners.

[0055] Obviously, dry ice is solid, and it is difficult to spray it alone. Therefore, another medium is needed to drive the dry ice particles for spraying.

[0056] Preferably, the spraying of dry ice is driven by the most readily available air.

[0057] Therefore, to achieve the spraying of air and dry ice:

[0058] like Figure 3 , 4 As shown, the dry ice blasting device 1 includes a nozzle 8, a mixing chamber 11 is formed inside the nozzle 8, an air inlet 9 and an injection port 10 are respectively provided at both ends of the nozzle 8 to connect the inside and outside of the mixing chamber 11, and a dry ice inlet 13 is formed by opening in the side wall of the nozzle 8 and extending in a direction away from the injection port 10.

[0059] Preferably, the nozzle 8 is a tubular structure, and a mixing chamber 11 is formed inside the tubular structure.

[0060] After the air and dry ice enter the mixing chamber 11 through the air inlet 9 and the dry ice inlet 13 respectively, the two meet, collide and mix in the mixing chamber, and then the dry ice is driven by the air to be ejected from the ejection port 10 and ejected onto the heating tube 3 for cleaning.

[0061] Preferably, the air entering from the air inlet 9 is high-pressure air with greater kinetic energy.

[0062] When the air enters the mixing chamber 11, a large impact force needs to be ensured to drive the dry ice spray. Therefore, in order to ensure that the kinetic energy of the air does not decay when entering the mixing chamber 11, preferably, the mixing chamber 11 is a cylindrical cavity, which is coaxially arranged with the air inlet 9.

[0063] When dry ice is sprayed, if it is sprayed straight from the spray port 10, the spraying area of ​​a single nozzle 8 is small. If a large area is to be cleaned, more nozzles 8 need to be provided.

[0064] Therefore, in order to increase the spraying area of ​​the nozzle 8, a diverter 12 is provided at the end of the injection port 10 in the mixing chamber 11. The diverter 12 is gradually arranged from the end of the injection port 10 to the inside of the mixing chamber 11, and there is a gap between the outer edge of the diverter 12 and the side wall of the mixing chamber 11.

[0065] Preferably, in order to prevent the kinetic energy of the dry ice and air from being excessively attenuated when passing through the diverter 12, the diverter 12 is coaxially arranged with the tubular structure.

[0066] By providing the diverter 12, when the dry ice and air flow to the diverter 12 in the mixing chamber 11, they are blocked and diverted by the diverter 12. The side surface of the diverter 12 defines the flow direction, and finally they are ejected through the gap between the diverter 12 and the mixing chamber 11. Under the action of inertia, they are still ejected along the diversion direction of the diverter 12, so that the ejection area of ​​the dry ice and air becomes larger.

[0067] The diverter 12 is connected to the nozzle 8 via a fixing member to fix the diverter 12 .

[0068] Preferably, in order to ensure that the diverter 12 is firmly fixed without excessively blocking the spraying of the cleaning medium and air, the fixing parts are symmetrically arranged at two locations about the axis center of the diverter 12 .

[0069] Further preferably, the fixing member is a detachable structure, and the diverter 12 is detachably connected to the nozzle 8 via the fixing member. At this time, by disassembling and replacing the diverter 12, the shape and range of the dry ice spray can be adjusted.

[0070] During the cleaning process of the heater by the cleaning device, the dry ice blasting device 1 needs to cooperate with the ultrasonic device 2 to complete the cleaning. However, if the cleaning device is manually controlled, it will not only waste human resources, but also may affect the cleaning effect.

[0071] Therefore, the cleaning device also includes a controller, which is used to control all components in the cleaning device to cooperate with the device to complete cleaning.

[0072] The controller is connected to the dry ice blasting device 1 and controls the dry ice blasting device 1 to blast dry ice toward the heating tube 3 .

[0073] The controller is also connected to the ultrasonic device 2 and controls the ultrasonic device 2 to transmit ultrasonic waves into the dry ice medium during the spraying process of the dry ice.

[0074] Ultrasonic waves are output during the spraying stage. The high-frequency vibration of ultrasonic waves can further crush the dry ice into more and smaller particles, increasing the contact area with the stains to be cleaned. It can also shake out the stains in the gaps of the heater, thereby enhancing the cleaning effect.

[0075] Alternatively, the controller controls the ultrasonic device 2 to transmit ultrasonic waves into the dry ice medium after the dry ice is sprayed onto the heating tube 3. At this time, the ultrasonic waves can not only further crush the dry ice particles, but also make the dry ice particles and the stains vibrate relative to each other, so that the dry ice and the stains can be more fully contacted and reacted, further improving the cleaning effect of the cleaning medium.

[0076] The most preferred solution is that the controller controls the ultrasonic device 2 to transmit ultrasonic waves into the dry ice medium during the spraying process of dry ice and after the dry ice is sprayed onto the heating tube 3, which has the best cleaning effect.

[0077] The dry ice spraying device further includes a high-pressure gas source 14, a filter 15, and a pressure regulating valve 16, wherein:

[0078] The high-pressure air source 14 is used to inhale air, compress the air to form high-pressure gas, and then transport the high-pressure air out.

[0079] Because the working environment of the cleaning device may contain impurities such as smoke oil and dust, the filter 15 filters the air to obtain clean air without impurities, so as to avoid secondary pollution to the cleaned area caused by the air containing more impurities. Specifically, the filter 15 can be an oil-gas separator for filtering oil in the air.

[0080] The pressure regulating valve 16 can adjust the pressure of the high-pressure air to obtain the desired spraying effect. Specifically, the pressure regulating valve 16 is a gas pressure reducing valve, which reduces the higher gas pressure in the pipeline before the valve to the required level of the pipeline after the valve.

[0081] The high-pressure gas source 14, the filter 15 and the pressure regulating valve 16 are connected in sequence, the pressure regulating valve 16 is connected to the air inlet 9, the air is sucked in and pressurized by the high-pressure gas source 14, and then enters the filter 15, after being filtered by the filter 15, enters the pressure regulating valve 16, and after being pressure-regulated by the pressure regulating valve 16, enters the mixing chamber 11 through the air inlet 9.

[0082] Preferably, the controller is connected to the high-pressure gas source 14, the filter 15 and the pressure regulating valve 16 respectively, and controls the high-pressure gas source 14 to inhale and pressurize air, the filter 15 to filter the air, and the pressure regulating valve 16 to adjust the pressure of the air.

[0083] The dry ice blasting device 1 further comprises a dry ice storage tank 17 , which stores dry ice and is connected to the dry ice inlet 13 . The dry ice particles in the dry ice storage tank 17 enter the mixing chamber 11 through the dry ice inlet 13 .

[0084] After the dry ice is sprayed onto the heater, although some of the stains will be removed from the heater as the dry ice sublimates, some of the stains may still remain. Although they have become brittle or have gaps with the surface of the heating tube 3, they have not been completely peeled off and continue to adhere to the surface, or fall to the bottom of the heater after being peeled off, and manual cleaning is still required at this time.

[0085] Therefore, in order to completely discharge the stains from the heater, the cleaning device also includes a fan, and the controller is connected to the fan.

[0086] The controller controls the fan to start after the dry ice sublimates, driving the dirt to peel off the surface of the heating tube 3.

[0087] Alternatively, the fan is controlled to start when dry ice is sprayed onto the surface of the heat dissipation fins, so as to promote the sublimation of dry ice and drive the dirt to peel off the surface of the heating tube 3.

[0088] The controller also controls the fan to start to generate circulating air, and the circulating air drives the peeled stains (mainly referring to the stains that fall to the bottom of the heater or other positions after being peeled off) to be discharged from the heater.

[0089] Preferably, the fan has either a blowing function or a suction function, or both functions, so as to suck or blow the stripped stains out of the heater.

[0090] By setting up a controller instead of manual control, the operation of each part can be accurately controlled to ensure that each part works together to achieve the best cleaning effect; it also reduces the manpower burden and saves human resources; it avoids negligence and omissions that may occur by manpower and improves cleaning quality and efficiency.

[0091] The above description is only a preferred embodiment of the present invention, and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technician familiar with this patent can make some changes or modifications to equivalent embodiments of equivalent changes using the technical contents suggested above without departing from the scope of the technical solution of the present invention. The implementation schemes in the above embodiments can also be further combined or replaced. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the present invention.

Claims

1. A heater with a cleaning device, which is equipped with a heating tube (3), characterized in that: The cleaning device comprises: A dry ice spraying device (1), wherein the spraying port (10) is arranged toward the heating tube (3) and is used for spraying dry ice toward the heating tube (3); The ultrasonic device (2) has an output end disposed toward the heating tube, and the output end transmits ultrasonic waves to the dry ice medium sprayed by the dry ice spraying device (1).

2. A heater with a cleaning device according to claim 1, characterized in that: The heater has a mounting frame, the heating tube (3) is arranged in a frame opening of the mounting frame, and the dry ice blasting device (1) and the ultrasonic device (2) are arranged at the edge of the frame opening of the mounting frame and are located on one side or both sides of the heating tube (3).

3. A heater with a cleaning device according to claim 2, characterized in that: The mounting frame comprises upper and lower frame bars and left and right frame bars which are arranged opposite to each other, the heating tube (3) is arranged to extend from the upper frame bar (6) toward the lower frame bar (7), and the dry ice blasting device (1) and the ultrasonic device (2) are arranged on the left frame bar (4) side and / or the right frame bar (5) side.

4. A heater with a cleaning device according to claim 3, characterized in that: The dry ice blasting device (1) and the ultrasonic device (2) are arranged on at least one of the left and right frame bars, at least two ultrasonic devices (2) are arranged on a single frame bar, and the dry ice blasting device (1) is arranged between adjacent ultrasonic devices (2).

5. The heater with a cleaning device according to claim 4, characterized in that: The ultrasonic device (2) is respectively arranged at the upper and lower ends of the left and right frame bars, and the dry ice blasting device (1) is respectively arranged at the middle area of ​​the left and right frame bars.

6. A heater with a cleaning device according to any one of claims 1 to 5, characterized in that: The dry ice blasting device (1) comprises a nozzle (8), a mixing chamber (11) is formed inside the nozzle (8), an air inlet (9) and a jet port (10) are respectively provided at two ends of the nozzle (8) for connecting the inside and outside of the mixing chamber (11), a flow divider (12) is provided at the end of the jet port (10) in the mixing chamber (11), and a gap is provided between the outer edge of the flow divider (12) and the side wall of the mixing chamber (11).

7. A heater with a cleaning device according to claim 6, characterized in that: The flow dividing member (12) is arranged to gradually contract from the end of the injection port (10) toward the inner side of the mixing chamber (11).

8. The heater with a cleaning device according to claim 7, characterized in that: The nozzle (8) is a tubular structure, the mixing chamber (11) is formed inside the tubular structure, and the flow divider (12) is arranged coaxially with the tubular structure.

9. The heater with a cleaning device according to claim 8, characterized in that: A dry ice inlet (13) is formed in the side wall of the nozzle (8) and extends in a direction away from the end of the injection port (10); After the air and the dry ice enter the mixing chamber (11) through the air inlet (9) and the dry ice inlet (13) respectively, the dry ice is driven by the air and ejected from the ejection port (10).

10. A heater with a cleaning device according to claim 1, 2, 3, 4, 5, 7, 8 or 9, characterized in that: The cleaning device also includes a controller, which is connected to the dry ice blasting device (1) and the ultrasonic device (2) respectively; The controller controls the dry ice blasting device (1) to blast dry ice onto the heating tube (3), and controls the ultrasonic device (2) to transmit ultrasonic waves into the dry ice medium during the blasting process of the dry ice and / or after the dry ice is blasted onto the heating tube (3).

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