A snowflake nozzle, cleaning machine and application method thereof

Abstract

The present invention relates to the technical field of snowflake cleaning, and proposes a snowflake nozzle, a cleaning machine and an application method thereof, comprising a main body, a mixing component and a guide tube, wherein the main body is provided with a first chamber and a second chamber; the mixing component is used to mix compressed gas and liquid carbon dioxide; the guide tube is sleeved on the mixing component, and a return flow channel is provided between the guide tube and the mixing component, and the return flow channel is connected to the first chamber; the guide tube is fixedly connected to the main body; or, the guide tube is slidably connected to the main body, the guide tube partially penetrates the first chamber and extends into the second chamber, and the hot air flow pressure in the second chamber is used as a damper. The present invention can absorb the falling objects under the sweeping by setting the first chamber to avoid splashing and affecting other components of the equipment; by setting the second chamber, a hot air flow can be sent into the isolation chamber to reduce the generation of condensed water, thereby effectively preventing the influence of falling objects and condensed water on equipment components, and is suitable for cleaning work of precision equipment.

Description

Technical Field

[0001] The invention relates to the technical field of snowflake cleaning, and in particular to a snowflake nozzle, a cleaning machine and an application method thereof. Background Art

[0002] Snow cleaning machine refers to a device that uses snowflake-shaped dry ice particles for cleaning. This cleaning machine achieves the cleaning effect by spraying dry ice (solid carbon dioxide) particles onto the surface to be cleaned. The dry ice particles will quickly sublimate (directly change from solid to gas) when they hit the target surface, thus generating physical and thermal shock, removing dirt, grease, coatings and other unwanted substances.

[0003] The existing utility model patent with authorization announcement number CN219003411U discloses a carbon dioxide snowflake cleaning nozzle and spray gun, which includes a mixed gas base tube, a liquid outlet pipe and a second joint, and also includes a nozzle; the mixed gas base tube is an axially through-tube structure and has a head end and a tail end, and an air cavity is formed inside the mixed gas base tube; the second joint is installed at the head end of the mixed gas base tube, the nozzle is installed at the tail end of the mixed gas base tube and docked with the air cavity, the liquid outlet pipe is installed in the air cavity, and a third joint is provided on the outer peripheral surface of the mixed gas base tube, and the third joint is connected to the air cavity.

[0004] As in the above technical scheme, dry ice particles are output through a mixed gas base tube for cleaning. However, no corresponding protective measures are set. When cleaning, the detached materials will splash everywhere. Therefore, it is not suitable for cleaning precision equipment, which will cause damage to surrounding components and limit the scope of application. Secondly, the above scheme only discloses a single nozzle structure, but does not set a corresponding limit assembly. Therefore, the distance between the nozzle and the workpiece to be cleaned cannot be effectively controlled. When cleaning precision equipment, it is easy to cause damage to the equipment. Summary of the invention

[0005] In view of this, the present invention proposes a snowflake nozzle, a cleaning machine and an application method thereof, which can effectively avoid splashing of cleaning debris and can well control the nozzle distance, so as to solve the problem that the existing snowflake nozzle is not suitable for cleaning precision equipment and has a limited application range.

[0006] The technical solution of the present invention is achieved in this way:

[0007] In one aspect, the present invention provides a snowflake nozzle, comprising a main body, a mixing assembly and a guide tube, wherein:

[0008] The main body is used to support the mixing assembly, and is provided with a first chamber and a second chamber, wherein the first chamber is used to circulate the suction airflow, and the second chamber is used to circulate the hot airflow;

[0009] The mixing assembly is plugged into the main body and is used to mix the compressed gas and liquid carbon dioxide to output snowflakes, and an isolation chamber is provided in the mixing assembly to circulate the hot air flow supplied by the second chamber;

[0010] The guide tube is sleeved on the mixing assembly and extends outside the main body, and a return flow channel is provided between the guide tube and the mixing assembly, and the return flow channel is communicated with the first chamber;

[0011] The guide tube is fixedly connected to the main body; or,

[0012] The guide tube is slidably connected to the main body, and a portion of the guide tube penetrates the first chamber and extends into the second chamber, and uses the hot air flow pressure in the second chamber as a damper.

[0013] On the basis of the above technical solution, preferably, the guide tube is slidably connected to the main body, and the main body includes a lower bracket, an upper bracket and a side plate, wherein:

[0014] The lower bracket and the upper bracket are both rectangular frame structures, the inner space of the lower bracket is the first chamber, and the inner space of the upper bracket is the second chamber;

[0015] The guide tube is slidably connected to the lower bracket;

[0016] Two side plates are arranged opposite to each other, the two side plates are connected with the lower bracket and the upper bracket, and two limiting plates are arranged on the inner sides of the side plates to clamp the lower bracket and the upper bracket.

[0017] On the basis of the above technical solution, preferably, it further comprises an isolating member, the isolating member comprises a ring plate, a magnetic sleeve and an elastic diaphragm, wherein:

[0018] One side of the upper bracket abuts against the lower bracket and is provided with a through hole;

[0019] The ring plate is sleeved on the mixing assembly, and the ring plate is located in the second chamber and corresponds to the through hole;

[0020] The magnetic sleeve is arranged on a surface of the ring plate facing the lower bracket;

[0021] The elastic diaphragm is an annular structure, one end of the elastic diaphragm is connected to the annular plate, and the other end is connected to the lower bracket and passes through the through hole;

[0022] A guide rod is arranged on the top surface of the guide tube, and the guide rod extends into the second chamber. The guide rod is located on the inner side of the elastic diaphragm and is plugged with the magnetic sleeve.

[0023] On the basis of the above technical solution, preferably, it also includes a gas delivery component, the gas delivery component includes a suction tube, an input tube, a solenoid valve and a connecting tube, wherein,

[0024] The suction tube and the input tube are arranged on the same side plate, the suction tube is connected to the first chamber, and the input tube is connected to the second chamber;

[0025] The solenoid valve is arranged on the other side plate and communicated with the second chamber;

[0026] One end of the connecting pipe is connected with the electromagnetic valve, and the other end passes through the main body and is connected with the isolation chamber.

[0027] On the basis of the above technical solution, preferably, it further includes a sealing cover, a first heating coil and a travel sensor, wherein:

[0028] The sealing cover is annular in structure, and one end of the sealing cover is movably connected to the guide tube;

[0029] A first heating coil is disposed on the isolator and surrounds the mixing assembly;

[0030] The travel sensor is arranged on the upper bracket, and the detection end of the travel sensor abuts against the isolation piece.

[0031] On the basis of the above technical solution, preferably, it also includes a purge pipe, wherein:

[0032] The guide tube, guide rod and ring plate are all hollow structures and are interconnected. A plurality of nozzles are arranged at one end of the guide tube away from the ring plate.

[0033] One end of the purge pipe is connected and penetrated with the ring plate, and the other end is led out to the outside of the main body. The purge pipe is a flexible pipe.

[0034] On the basis of the above technical solution, preferably, it further comprises a second heating coil, wherein:

[0035] The guide tube is fixedly connected to the main body;

[0036] The first chamber is connected to the second chamber, the second chamber is closed relative to the isolation chamber, and the second chamber is provided with an exhaust port;

[0037] The second heating coil is buried inside the main body.

[0038] On the other hand, the present invention provides a cleaning machine including the above-mentioned snowflake nozzle.

[0039] In another aspect, the present invention provides an application method of the above-mentioned snowflake nozzle, comprising the following steps:

[0040] S1. Connect the mixing assembly to the gas compression device and the carbon dioxide storage device, connect the first chamber to the negative pressure induced draft fan, and connect the second chamber to the hot air supply device;

[0041] S2, inputting compressed gas and liquid carbon dioxide into the mixing component, and spraying snowflakes after mixing in the mixing component;

[0042] S3, when the snowflakes are being purged and cleaned, the negative pressure induced draft fan is turned on to absorb the fallen objects through the return flow channel and then discharge them through the first chamber.

[0043] At the same time, the hot air supply device supplies hot air into the second chamber to increase the surface temperature of the mixing component and reduce the generation of condensed water.

[0044] In another aspect, the present invention provides an application method of the above-mentioned snowflake nozzle, comprising the following steps:

[0045] P1. Connect the mixing assembly to the gas compression device and the carbon dioxide storage device, connect the first chamber to the negative pressure induced draft fan, and connect the second chamber to the hot air supply device;

[0046] P2, inputting compressed gas and liquid carbon dioxide into the mixing component, and spraying snowflakes after mixing in the mixing component;

[0047] P3. Adjust the solenoid valve to the maximum opening to ensure smooth gas delivery. The hot air supply device delivers hot air into the second chamber through the input pipe. The hot air then enters the isolation chamber through the solenoid valve and the connecting pipe to increase the surface temperature of the mixing component and reduce the generation of condensed water.

[0048] P4. The closure cover is pressed against the workpiece, and the stroke sensor receives force feedback. The opening of the solenoid valve is reduced. At this time, the pressure in the second chamber increases, and the isolation piece is stressed as a whole, generating upward resistance to the guide tube.

[0049] At the same time, the first heating coil is turned on;

[0050] P5. The closure cover remains stationary, and the other components swing relative to the closure cover, so that the mixing assembly can fully clean the space inside the closure cover. Under the pressure of the second chamber and the elasticity of the elastic diaphragm, the mixing assembly can float up and down relative to the guide tube and the closure cover to adjust the distance relative to the workpiece;

[0051] P6. When the snowflakes are being purged and cleaned, the negative pressure induced draft fan is turned on to absorb the fallen objects through the return flow channel and then discharge them through the first chamber;

[0052] P7. After cleaning, the sealing cover leaves the workpiece surface. Under the pressure of the second chamber and the weight of the guide tube and the sealing cover, the guide tube and the sealing cover move away from the main body, and the travel sensor is released from the support of the isolation member.

[0053] P8, the stroke sensor receives force feedback, the solenoid valve is adjusted to the maximum opening, the gas resumes normal circulation, and the first heating coil is closed; then P4~P8 are repeated to achieve continuous cleaning work.

[0054] The snowflake nozzle, cleaning machine and application method of the present invention have the following beneficial effects compared with the prior art:

[0055] (1) The main body is provided for installing the mixing component, and the first chamber and the second chamber are provided on the main body, so that the falling objects under the blowing can be sucked out through the first chamber, so as to avoid splashing and affecting other components of the equipment; the second chamber can be provided to send hot air flow into the isolation chamber, thereby reducing the generation of condensed water, so as to effectively prevent the falling objects and condensed water from affecting the equipment components, and it is suitable for cleaning work of precision equipment;

[0056] (2) By partially extending the guide tube into the second chamber, when the hot air flow flows in the second chamber, the guide tube as a whole forms a piston structure, which can descend by its own weight and air pressure, and when moving upward, it uses the hot air flow as a damper, and resistance will be generated due to air pressure; in this way, when the guide tube contacts the workpiece, the position of the mixing component nozzle from the workpiece surface can be better controlled, which can not only ensure the cleaning effect, but also avoid damage to equipment components;

[0057] (3) An isolator is provided on the guide tube, so that the isolator can seal the mixing assembly and the lower bracket of the main body, thereby ensuring that the air pressure can better act on the guide tube, which further improves the reliability of the nozzle distance control;

[0058] (4) The main body is provided with an upper bracket and a lower bracket, and the upper bracket and the lower bracket are connected and fixed through a side plate, wherein the upper bracket is also provided with a through hole, so that it is convenient to connect the mixing assembly, the isolator and the lower bracket, and then fix the upper bracket and the lower bracket through the side plate; at the same time, the guide tube is plugged into the magnetic sleeve of the isolator through the guide rod, which improves the convenience of disassembly and maintenance;

[0059] (5) The second chamber of the main body is connected to the isolation chamber of the mixing assembly through the solenoid valve and the connecting pipe in the gas transmission assembly. In this way, when cleaning, the solenoid valve can reduce the opening degree and reduce the gas flow to the isolation chamber, thereby increasing the gas pressure in the second chamber, thereby increasing the pressure on the guide tube, which has greater resistance when the guide tube moves upward, realizing an adjustable resistance structure, and making the displacement control of the mixing assembly more reliable;

[0060] (6) By arranging a first heating coil on the isolation member, the air flow temperature can be increased when the air flow into the isolation chamber is reduced, so as to ensure the heating capacity of the surface of the mixing component, thereby reducing the generation of condensed water. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0062] Figure 1 A three-dimensional diagram of the snowflake nozzle of the present invention;

[0063] Figure 2 It is a front view of the snowflake sprinkler of the present invention;

[0064] Figure 3 For the present invention Figure 2 Middle AA section view;

[0065] Figure 4 For the present invention Figure 3 A magnified view of the structure at point A;

[0066] Figure 5 It is a cross-sectional view of a mixing assembly of a snowflake sprinkler of the present invention;

[0067] Figure 6 It is an exploded view of the snowflake nozzle of the present invention;

[0068] Figure 7 It is a structural diagram of a snowflake nozzle provided with a purge pipe of the present invention;

[0069] Figure 8 For the present invention Figure 7 sectional view of

[0070] Fig. 9 This is a cross-sectional view of the fixed arrangement structure of the guide tube of the snowflake sprinkler of the present invention;

[0071] Fig.10 This is a structural diagram of the first chamber and the second chamber of the snowflake nozzle of the present invention being independently arranged;

[0072] In the figure: 1. main body; 11. lower bracket; 12. upper bracket; 13. side plate; 131. limit plate; 101. first chamber; 102. second chamber; 103. return flow channel; 1201. through hole; 2. mixing component; 21. mixing pipe; 22. adapter; 23. control valve; 201. isolation chamber; 202. carbon dioxide channel; 203. compressed gas channel; 204. mixing zone; 3. guide tube; 31. guide rod; 4. isolation member; 41. ring plate; 42. magnetic sleeve; 43. elastic diaphragm; 5. gas transmission component; 51. suction tube; 52. input tube; 53. solenoid valve; 54. connecting tube; 6. closing cover; 7. first heating coil; 8. stroke sensor; 9. purge tube; 10. second heating coil. DETAILED DESCRIPTION

[0073] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0074] like Figure 1 to Figure 10 As shown, the snowflake nozzle of the present invention comprises a main body 1, a mixing assembly 2, a guide tube 3, an isolator 4, a gas delivery assembly 5, a sealing cover 6, a first heating coil 7, a stroke sensor 8, a purge pipe 9 and a second heating coil 10;

[0075] The cleaning machine of the present invention comprises the above-mentioned snowflake spray head.

[0076] like Figure 1~Figure 5 As shown, the main body 1 is used to support the mixing component 2, and is provided with a first chamber 101 and a second chamber 102. The first chamber 101 is used to circulate the suction airflow, and the second chamber 102 is used to circulate the hot airflow; the mixing component 2 is inserted into the main body 1, and is used to mix the compressed gas and the liquid carbon dioxide to output snowflakes, and the mixing component 2 is provided with an isolation chamber 201, which is used to circulate the hot airflow supplied by the second chamber 102; the guide tube 3 is sleeved on the mixing component 2 and extends to the outside of the main body 1, and a return flow channel 103 is provided between the guide tube 3 and the mixing component 2, and the return flow channel 103 is connected to the first chamber 101; the guide tube 3 is fixedly connected to the main body 1; or, the guide tube 3 is slidably connected to the main body 1, and the guide tube 3 partially penetrates the first chamber 101 and extends into the second chamber 102, and the hot airflow pressure in the second chamber 102 is used as a damper;

[0077] As in the above structure, the main body 1, the mixing assembly 2 and the guide tube 3 work together, wherein:

[0078] like Figure 1 and Figure 5 As shown, the mixing assembly 2 is a nozzle assembly, which includes a mixing pipe 21, an adapter 22 and a control valve 23. The mixing pipe 21 has an isolation chamber 201, a carbon dioxide channel 202, a compressed gas channel 203 and a mixing area 204;

[0079] The carbon dioxide channel 202 is connected to the control valve 23, which is used to connect the carbon dioxide supply device and control the supply amount of carbon dioxide. The control valve 23 adopts a solenoid valve; the compressed gas channel 203 is connected to the adapter 22 for inputting compressed gas, and then the compressed gas and carbon dioxide are mixed in the mixing area 204 to form snowflakes, and finally sprayed out through the nozzle;

[0080] The isolation chamber 201 is arranged inside the mixing assembly 2 and surrounds the nozzle assembly. It is coaxially arranged with the carbon dioxide channel 202 and the compressed gas channel 203. In this way, when the hot air flow is circulated, the surface temperature of the inner nozzle assembly can be increased, the generation of condensed water can be reduced, and the components of the equipment can be prevented from being affected.

[0081] like Figure 3 and Figure 4 As shown, the first chamber 101 of the main body 1 is used to circulate the suction airflow, so that when the mixing component 2 sprays snowflakes for cleaning, the return flow channel 103 between the guide tube 3 and the mixing component 2 can form a negative pressure to attract and remove the cleaning detached objects, thereby avoiding affecting other components of the device and reducing the possibility of component damage;

[0082] The guide tube 3 is fixedly connected to the main body 1 and communicated with the first chamber 101 of the main body 1, so as to achieve the suction and discharge of the fallen objects;

[0083] Or the guide tube 3 is slidably connected to the main body 1, and the guide tube 3 is applied to abut against the surface of the workpiece, so as to achieve the sealing of the cleaning part, so that the return flow channel 103 can better absorb the falling objects and avoid the falling objects from splashing;

[0084] When the guide tube 3 is set to a sliding state, a part of the guide tube 3 extends into the second chamber 102. In this way, when a hot air flow flows in the second chamber 102, the guide tube 3 as a whole forms a piston structure, which can descend by relying on its own weight and air pressure, and when moving upward, it will generate resistance due to the air pressure, and the hot air flow is used as a damper; in this way, when the guide tube 3 contacts the workpiece, the position of the nozzle of the mixing component 2 away from the surface of the workpiece can be better controlled, which can not only ensure the cleaning effect, but also avoid damage to equipment components.

[0085] like Figure 4 and Figure 6As shown, the guide tube 3 is slidably connected to the main body 1, and the main body 1 includes a lower bracket 11, an upper bracket 12 and a side plate 13, wherein the lower bracket 11 and the upper bracket 12 are both rectangular frame structures, the inner space of the lower bracket 11 is a first chamber 101, and the inner space of the upper bracket 12 is a second chamber 102; the guide tube 3 is slidably connected to the lower bracket 11; two side plates 13 are relatively arranged, the two side plates 13 are connected to the lower bracket 11 and the upper bracket 12, and two limit plates 131 are arranged on the inner side of the side plate 13 to clamp the lower bracket 11 and the upper bracket 12;

[0086] As in the above structure, the main body 1 is composed of two parts. The inner cavity of the lower bracket 11 is the first chamber 101, which is used to attract the cleaned fallen objects. The upper bracket 12 surrounds the mixing component 2 and is used to circulate the hot air flow. In this way, the upper bracket 12 and the lower bracket 11 are both set as rectangular frame structures to facilitate assembly. Then, the upper bracket 12 and the lower bracket 11 are connected and fixed by the side plate 13. Since the hot air flow is provided by an external component, the integration complexity of the nozzle is reduced, and it is also convenient for later maintenance.

[0087] In order to further ensure the reliability of fixation, a limiting plate 131 is provided on the inner side of the side panel 13, so that the sides of the upper bracket 12 and the lower bracket 11 can be clamped to make the connection between the two more secure. Subsequently, bolts and other fasteners can be used to lock and fix the side panel 13, the upper bracket 12 and the lower bracket 11.

[0088] like Figure 4 , Figure 6 and Figure 8 As shown, the isolating member 4 includes a ring plate 41, a magnetic sleeve 42 and an elastic diaphragm 43, wherein one side of the upper bracket 12 abuts against the lower bracket 11 and is provided with a through hole 1201; the ring plate 41 is sleeved on the mixing assembly 2, the ring plate 41 is located in the second chamber 102 and corresponds to the through hole 1201; the magnetic sleeve 42 is arranged on the side of the ring plate 41 facing the lower bracket 11; the elastic diaphragm 43 is an annular structure, one end of the elastic diaphragm 43 is connected to the ring plate 41, and the other end is connected to the lower bracket 11 and passes through the through hole 1201; a guide rod 31 is arranged on the top surface of the guide tube 3, the guide rod 31 extends into the second chamber 102, the guide rod 31 is located on the inner side of the elastic diaphragm 43, and is plugged with the magnetic sleeve 42;

[0089] As in the above structure, the isolation member 4 is used to improve the relative sealing performance between the first chamber 101 and the second chamber 102, wherein one end of the elastic diaphragm 43 is sealedly connected to the lower bracket 11, and the other end is sealedly connected to the mixing assembly 2 through the ring plate 41;

[0090] The isolating member 4 is connected to the guide rod 31 of the guide tube 3 through the magnetic sleeve 42. When the guide tube 3 is assembled, the guide tube 3 is slidably connected to one side of the lower bracket 11, and the guide rod 31 is slidably connected to the other side opposite thereto, and passes through the through hole 1201 of the upper bracket 12, and then is plugged into the magnetic sleeve 42, so as to be connected by magnetic attraction.

[0091] In this way, when the application is carried out, the air pressure in the second chamber 102 will act on the isolation member 4, and then be transmitted to the guide tube 3, acting as a damper, which further improves the control reliability of the nozzle distance;

[0092] With such a structure, when maintenance is required, the guide tube 3 can be directly pulled out to separate the guide rod 31 from the elastic diaphragm 43, thereby improving the convenience of disassembly and maintenance. Moreover, since the magnetic sleeve 42 is relatively fixed to the mixing assembly 2 through the ring plate 41, there will be no displacement, so it is convenient to reinstall the guide tube.

[0093] like Figure 3 , Figure 4 and Figure 6 As shown, the gas delivery assembly 5 includes a suction pipe 51, an input pipe 52, a solenoid valve 53 and a connecting pipe 54, wherein the suction pipe 51 and the input pipe 52 are arranged on the same side plate 13, the suction pipe 51 is connected to the first chamber 101, and the input pipe 52 is connected to the second chamber 102; the solenoid valve 53 is arranged on another side plate 13 and is connected to the second chamber 102; one end of the connecting pipe 54 is connected to the solenoid valve 53, and the other end passes through the main body 1 and is connected to the isolation chamber 201;

[0094] As in the above structure, when in use, the suction pipe 51 is connected to the negative pressure induced draft fan to suck out the fallen objects, and the fallen objects will enter the first chamber 101 through the return flow channel 103 in the guide tube 3, and then be discharged through the suction pipe 51;

[0095] The input pipe 52 is connected to the hot air supply device, so that after the hot air enters the second chamber 102 through the input pipe 52, it passes through the solenoid valve 53 and the connecting pipe 54, and then enters the isolation chamber 201 of the mixing component 2;

[0096] In this way, when cleaning is performed, the solenoid valve 53 can reduce its opening, reduce the air flow to the isolation chamber 201, and thus increase the air pressure in the second chamber 102, thereby increasing the pressure on the guide tube 3, so that the guide tube 3 has a greater resistance when moving upward, realizing a resistance adjustable structure, and thus making the displacement control reliability of the mixing assembly 2 better;

[0097] Among them, the connecting pipe 54 adopts a hose, which passes through the lower bracket 11, and the guide tube 3 slides through the guide rod 31, so that the connecting pipe 54 can pass through the gap between two adjacent guide rods 31, and then connect with the mixing component 2 to connect with the isolation chamber 201, thereby realizing the transfer of hot air flow and avoiding interference between the components during operation.

[0098] like Figure 3 and Figure 4 As shown, the sealing cover 6 is annular, and one end of the sealing cover 6 is movably connected to the guide tube 3; the first heating coil 7 is arranged on the isolation member 4 and surrounds the mixing assembly 2; the stroke sensor 8 is arranged on the upper bracket 12, and the detection end of the stroke sensor 8 abuts against the isolation member 4;

[0099] As in the above structure, in order to further expand the cleaning range, a sealing cover 6 is movably connected to the guide tube 3, so that when cleaning, other parts except the sealing cover 6 can swing freely to perform comprehensive cleaning work on the area where the sealing cover 6 is buckled;

[0100] Specifically, the closure cover 6 and the guide tube 3 may be connected by a universal ball joint structure, so that the closure cover 6 can swing relative to the guide tube 3 within a certain range.

[0101] Specifically, the sealing cover 6 is made of a transparent material to facilitate observation of the distance between the nozzle of the mixing assembly 2 and the surface of the workpiece;

[0102] In this structure, a stroke sensor 8 is also provided. When the sealing cover 6 abuts against the surface of the workpiece during cleaning, a thrust is applied to the guide tube 3, thereby driving the isolation member 4 to push the stroke sensor 8. At this time, it is judged that the nozzle has entered the working state, and the opening of the solenoid valve 53 is adjusted to the minimum to increase the pressure in the second chamber 102, thereby providing damping for the guide tube 3, which is conducive to achieving a good buffering effect. During manual operation, a good control feel can be provided to facilitate accurate control of the feeding of the nozzle.

[0103] Furthermore, by arranging the first heating coil 7 on the isolation member 4, when the airflow into the isolation chamber 201 is reduced, the airflow temperature can be increased to ensure the heating capacity of the surface of the mixing assembly 2, thereby reducing the generation of condensed water;

[0104] When cleaning is completed, the sealing cover 6 leaves the workpiece surface, and the guide tube 3 and the isolation member 4 fall back under the action of their own weight and air pressure. At this time, the stroke sensor 8 is reset, the opening of the solenoid valve 53 is restored, and the first heating coil 7 stops working, thereby realizing automated control.

[0105] Specifically, the stroke sensor 8 may be a linear sensor.

[0106] In the snowflake nozzle structure, air pressure is used as a damper, and the opening of the electromagnetic valve 53 is adjusted to change the damping force of the guide tube 3 within a larger range, thereby improving the convenience of application.

[0107] like Figure 8 As shown, the guide tube 3, the guide rod 31 and the ring plate 41 are all hollow structures and are interconnected. A plurality of nozzles are provided at one end of the guide tube 3 away from the ring plate 41; one end of the purge tube 9 is connected and penetrated with the ring plate 41, and the other end is led out to the outside of the main body 1, and the purge tube 9 is a flexible tube;

[0108] As in the above structure, when cleaning, the airflow in the isolation chamber 201 becomes smaller, and the snowflake airflow sprayed by the nozzle will impact the surface of the workpiece and spread around, which is not very conducive to the back-absorption of the fallen objects;

[0109] After the guide tube 3, the guide rod 31 and the ring plate 41 are set as a hollow structure, the air supply device can be connected to the purge pipe 9 to supply air to the inside thereof, and blown downward through the inner cavity of the guide tube 3, thereby disturbing the scattered airflow, thereby agitating the fallen objects and improving the convenience of discharge during negative pressure suction;

[0110] Specifically, the purge tube 9 is configured as a flexible tube, which is directly introduced into the suction tube 51 and passed through the suction tube 51 to be led out, thereby avoiding interference with the movement of the isolation member 4 and improving the convenience of assembly.

[0111] like Fig. 9 As shown, the guide tube 3 is fixedly connected to the main body 1; the first chamber 101 and the second chamber 102 are connected, the second chamber 102 is closed relative to the isolation chamber 201, and the second chamber 102 is provided with an exhaust port; the second heating coil 10 is buried inside the main body 1;

[0112] As in the above structure, the guide tube 3 adopts a fixed structure, which is fixedly connected to the lower bracket 11 of the main body 1, and the exhaust port of the second chamber 102 is connected to the negative pressure induced draft fan;

[0113] In this structure, the first chamber 101 for removing the falling objects is connected to the second chamber 102, so that when the falling objects are removed, the falling objects will first enter the first chamber 101 through the return channel 103, then enter the second chamber 102, and then be discharged through the exhaust port of the second chamber 102;

[0114] Furthermore, in this structure, a second heating coil 10 is buried in the main body 1, so that it will be heated when the gas flows, and then the heat is transferred to the mixing component 2 along the airflow, thereby heating the surface of the mixing component 2 to reduce the generation of condensed water; in this structure, the second chamber 102 is not connected to the isolation chamber 201.

[0115] like Fig.10 As shown, in some embodiments, the main body 1 adopts an integrated structure, and is provided with a first chamber 101 and a second chamber 102, wherein the second chamber 102 is directly connected to the isolation chamber 201;

[0116] The first chamber 101 and the second chamber 102 are each provided with an opening. The first chamber 101 is connected to the negative pressure induced draft fan through the opening, and the second chamber 102 is connected to the hot air supply device.

[0117] An application method of the snowflake sprinkler of the present invention comprises the following steps:

[0118] S1, connecting the mixing assembly 2 to the gas compression device and the carbon dioxide storage device, connecting the first chamber 101 to the negative pressure induced draft fan, and connecting the second chamber 102 to the hot air supply device;

[0119] S2, inputting compressed gas and liquid carbon dioxide into the mixing component 2, and spraying snowflakes after mixing in the mixing component 2;

[0120] S3, when the snowflakes are being purged and cleaned, the negative pressure induced draft fan is turned on to absorb the fallen objects through the return flow channel 103, and then discharged through the first chamber 101,

[0121] At the same time, the hot air supply device delivers hot air into the second chamber 102 to increase the surface temperature of the mixing assembly 2 and reduce the generation of condensed water.

[0122] Another application method of the snowflake sprinkler of the present invention comprises the following steps:

[0123] P1. Connect the mixing assembly 2 to the gas compression device and the carbon dioxide storage device, connect the first chamber 101 to the negative pressure induced draft fan, and connect the second chamber 102 to the hot air supply device;

[0124] P2, inputting compressed gas and liquid carbon dioxide into the mixing component 2, and spraying snowflakes after mixing in the mixing component 2;

[0125] P3. Adjust the electromagnetic valve 53 to the maximum opening to ensure smooth gas delivery. The hot air supply device delivers hot air into the second chamber 102 through the input pipe 52. The hot air then passes through the electromagnetic valve 53 and the connecting pipe 54 to irritate the isolation chamber 201 to increase the surface temperature of the mixing component 2 and reduce the generation of condensed water.

[0126] P4. The sealing cover 6 is pressed against the workpiece, and the stroke sensor 8 receives force feedback. The opening of the solenoid valve 53 is reduced. At this time, the pressure in the second chamber 102 increases, and the isolation member 4 is subjected to force as a whole, generating an upward resistance to the guide tube 3.

[0127] At the same time, the first heating coil 7 is turned on;

[0128] P5, the sealing cover 6 remains stationary, and the other components swing relative to the sealing cover 6, so that the mixing component 2 can fully clean the space inside the sealing cover 6. Under the pressure of the second chamber 102 and the elasticity of the elastic diaphragm 43, the mixing component 2 can float up and down relative to the guide tube 3 and the sealing cover 6 to adjust the distance relative to the workpiece;

[0129] P6. When the snowflakes are being purged and cleaned, the negative pressure induced draft fan is turned on to absorb the fallen objects through the return flow channel 103 and then discharge them through the first chamber 101;

[0130] P7. After cleaning, the sealing cover 6 leaves the workpiece surface. Under the pressure of the second chamber 102 and the weight of the guide tube 3 and the sealing cover 6, the guide tube 3 and the sealing cover 6 move away from the main body 1, and the travel sensor 8 is released from the support of the isolation member 4.

[0131] P8, the stroke sensor 8 receives force feedback, the solenoid valve 53 is adjusted to the maximum opening, the gas resumes normal circulation, and the first heating coil 7 is closed; then P4 to P8 are repeated to achieve continuous cleaning work.

[0132] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A snowflake nozzle, characterized in that: It comprises a main body (1), a mixing assembly (2), a flow guide tube (3) and a spacer (4), wherein: The main body (1) is used to support the mixing assembly (2), and is provided with a first chamber (101) and a second chamber (102), wherein the first chamber (101) is used to circulate suction airflow, and the second chamber (102) is used to circulate hot airflow; The mixing component (2) is inserted into the main body (1) and is used to mix compressed gas and liquid carbon dioxide to output snowflakes, and an isolation chamber (201) is provided in the mixing component (2) for circulating the hot air flow supplied by the second chamber (102); The guide tube (3) is sleeved on the mixing assembly (2) and extends outside the main body (1), and a return flow channel (103) is provided between the guide tube (3) and the mixing assembly (2), and the return flow channel (103) is connected to the first chamber (101); The guide tube (3) is slidably connected to the main body (1); the guide tube (3) partially penetrates the first chamber (101) and extends into the second chamber (102), and uses the hot air flow pressure in the second chamber (102) as a damper; The main body (1) comprises a lower bracket (11), an upper bracket (12) and a side plate (13), wherein the lower bracket (11) and the upper bracket (12) are both rectangular frame structures, the inner space of the lower bracket (11) is the first chamber (101), and the inner space of the upper bracket (12) is the second chamber (102); the guide tube (3) is slidably connected to the lower bracket (11); two side plates (13) are arranged opposite to each other, and the two side plates (13) are connected to the lower bracket (11) and the upper bracket (12); The isolating member (4) comprises a ring plate (41), a magnetic sleeve (42) and an elastic diaphragm (43), wherein one side of the upper bracket (12) abuts against the lower bracket (11) and is provided with a through hole (1201); the ring plate (41) is sleeved on the mixing assembly (2), the ring plate (41) is located in the second chamber (102) and corresponds to the through hole (1201); the magnetic sleeve (42) is arranged on the ring plate (41) facing the lower bracket (11). 1); the elastic diaphragm (43) is an annular structure, one end of the elastic diaphragm (43) is connected to the annular plate (41), and the other end is connected to the lower bracket (11) and passes through the through hole (1201); a guide rod (31) is provided on the top surface of the guide cylinder (3), the guide rod (31) extends into the second chamber (102), the guide rod (31) is located on the inner side of the elastic diaphragm (43), and is plugged into the magnetic sleeve (42).

2. The snowflake nozzle according to claim 1, characterized in that: Two limiting plates (131) are arranged on the inner side of the side plate (13) to clamp the lower bracket (11) and the upper bracket (12).

3. The snowflake nozzle according to claim 2, characterized in that: It also includes a gas delivery assembly (5), the gas delivery assembly (5) including a suction tube (51), an input tube (52), a solenoid valve (53) and a connecting tube (54), wherein: The suction tube (51) and the input tube (52) are arranged on the same side plate (13); the suction tube (51) is connected to the first chamber (101), and the input tube (52) is connected to the second chamber (102); The solenoid valve (53) is arranged on the other side plate (13) and is connected to the second chamber (102); One end of the connecting pipe (54) is connected to the solenoid valve (53), and the other end passes through the main body (1) and is connected to the isolation chamber (201).

4. The snowflake nozzle according to claim 3, characterized in that: It also includes a sealing cover (6), a first heating coil (7) and a travel sensor (8), wherein: The sealing cover (6) is an annular structure, and one end of the sealing cover (6) is movably connected to the guide tube (3); The first heating coil (7) is arranged on the isolation member (4) and surrounds the mixing assembly (2); The travel sensor (8) is arranged on the upper bracket (12), and the detection end of the travel sensor (8) abuts against the isolation member (4).

5. The snowflake nozzle according to claim 3 or 4, characterized in that: It also includes a purge pipe (9), wherein: The guide tube (3), the guide rod (31) and the ring plate (41) are all hollow structures and are interconnected; a plurality of nozzles are provided at one end of the guide tube (3) away from the ring plate (41); One end of the purge pipe (9) is connected to and penetrates the ring plate (41), and the other end is led out to the outside of the main body (1); the purge pipe (9) is a flexible pipe.

6. A cleaning machine, characterized in that: It comprises the snowflake nozzle as described in any one of claims 1 to 5.

7. An application method of the snowflake sprinkler according to any one of claims 1 to 5, characterized in that: The following steps are involved: S1, connecting the mixing assembly (2) to a gas compression device and a carbon dioxide storage device, connecting the first chamber (101) to a negative pressure induced draft fan, and connecting the second chamber (102) to a hot air supply device; S2, inputting compressed gas and liquid carbon dioxide into the mixing component (2), and spraying snowflakes after mixing in the mixing component (2); S3, when the snowflakes are being purged and cleaned, the negative pressure induced draft fan is turned on to absorb the fallen matter through the return flow channel (103), and then discharge it through the first chamber (101), At the same time, the hot air supply device supplies hot air into the second chamber (102) to increase the surface temperature of the mixing component (2) and reduce the generation of condensed water.

8. An application method of the snowflake sprinkler as claimed in claim 4, characterized in that: The following steps are involved: P1. Connect the mixing assembly (2) to a gas compression device and a carbon dioxide storage device, connect the first chamber (101) to a negative pressure induced draft fan, and connect the second chamber (102) to a hot air supply device; P2, inputting compressed gas and liquid carbon dioxide into the mixing component (2), and spraying snowflakes after being mixed by the mixing component (2); P3. The solenoid valve (53) is adjusted to the maximum opening to ensure smooth gas delivery. The hot air supply device delivers hot air into the second chamber (102) through the input pipe (52). The hot air then enters the isolation chamber (201) through the solenoid valve (53) and the connecting pipe (54) to increase the surface temperature of the mixing component (2) and reduce the generation of condensed water. P4. The sealing cover (6) is pressed against the workpiece, the travel sensor (8) receives force feedback, and the opening of the solenoid valve (53) is reduced. At this time, the pressure in the second chamber (102) increases, and the isolation member (4) is subjected to force as a whole, generating an upward resistance to the guide tube (3). At the same time, the first heating coil (7) is turned on; P5, the sealing cover (6) remains stationary, and the other components swing relative to the sealing cover (6), so that the mixing component (2) can fully clean the space inside the sealing cover (6), and under the pressure of the second chamber (102) and the elasticity of the elastic diaphragm (43), the mixing component (2) can float up and down relative to the guide tube (3) and the sealing cover (6) to adjust the distance relative to the workpiece; P6. When the snowflakes are being purged and cleaned, the negative pressure induced draft fan is turned on to absorb the fallen matter through the return flow channel (103) and then discharge it through the first chamber (101); P7. After cleaning is completed, the sealing cover (6) leaves the workpiece surface, and under the influence of the pressure of the second chamber (102) and the deadweight of the guide tube (3) and the sealing cover (6), the guide tube (3) and the sealing cover (6) move away from the main body (1), and the travel sensor (8) is released from the abutment against the isolation member (4); P8, the stroke sensor (8) receives force feedback, the solenoid valve (53) is adjusted to the maximum opening, the gas resumes normal circulation, and the first heating coil (7) is closed; then P4 to P8 are repeated to achieve continuous cleaning.

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