Impeller cleaning device for volute fan

Abstract

An impeller cleaning device for a volute fan comprises a spray pipe, the spray pipe sprays cleaning fluid to an impeller, the spray pipe comprises an inner pipe and an outer pipe, the inner pipe comprises a movable pipe and a connecting hose, a closed end face with a thrust hole is formed at the top end of the movable pipe, the tail end of the movable pipe is communicated with the connecting hose, and the pipe diameter of the connecting hose is smaller than that of the movable pipe. The top end of the sleeving section is closed and extends by a certain distance along a straight line, the liquid injection section is bent and extends upwards, and the movable pipe is arranged in the sleeving section and moves left and right in the length direction of the sleeving section. Liquid is injected into a gap formed by the liquid injection section and the connecting hose so that the closed end face of the movable pipe can be pressed to the top end of the sleeving section through the gravity of the liquid, and the closed end face is pushed away from the top end of the sleeving section through the counter-acting force generated when cleaning fluid is sprayed to the top end of the sleeving section. The impeller cleaning device has the advantages that the impeller cleaning device is highly adaptive to pump capacity, the impeller can be cleaned in the whole axial width by connecting points into a line, and the impeller cleaning device is simple in structure and long in service life.

Description

Technical Field

[0001] The utility model relates to the field of cleaning of volute blowers, in particular to an impeller cleaning device for volute blowers. Background Art

[0002] Kitchen exhaust equipment such as range hoods or integrated stoves will continuously accumulate oil stains on the impeller of the volute fan during use. If not handled in time, it will seriously affect the exhaust effect of the range hood or integrated stove. Therefore, many manufacturers have equipped the range hood or integrated stove products with impeller cleaning devices. For example, the Chinese invention applications with application publication numbers CN104421986A and CN109798562A both use a nozzle with a spray hole to spray a cleaning agent on the impeller to complete the cleaning. However, due to the limitation of the pump capacity, only a few spray holes with relatively large spacing can be opened on the nozzle, so that only a few oil stains on the impeller corresponding to the spray holes can be cleaned.

[0003] Due to the problem that the current nozzle can only clean a few oil spots but cannot connect the spots into a line to clean the entire axial width of the impeller, there is an urgent need to develop an impeller cleaning device that can be adapted to the capacity of the pump and can connect the spots into a line to clean the entire axial width of the impeller. Utility Model Content

[0004] In view of the problems of the prior art, the utility model provides an impeller cleaning device for a volute fan, which has strong adaptability to the pump capacity, can connect points into lines to achieve comprehensive cleaning of the entire axial width of the impeller, has a simple and exquisite structure, and has a long service life.

[0005] The utility model mainly adopts the following technical solutions:

[0006] A device for cleaning an impeller of a volute fan, comprising a nozzle, the nozzle spraying a cleaning fluid toward an impeller located in the volute, the nozzle comprising an inner tube and an outer tube sleeved on the inner tube, the inner tube comprising a movable tube and a connecting hose, a top end of the movable tube is formed with a closed end face, a thrust hole is formed on the closed end face, an end of the movable tube is connected with the connecting hose, a diameter of the connecting hose is smaller than that of the movable tube, the outer tube comprises a sleeve section with a closed top and extending a distance in a straight line, and a liquid injection section which is bent and continues to extend upward, the movable tube is installed in the sleeve section and moves left and right along the length direction of the sleeve section, liquid is injected into the gap formed by the liquid injection section and the connecting hose so that the closed end face of the movable tube is pressed to the top end of the sleeve section by the gravity of the liquid, and the closed end face is pushed away from the top end of the sleeve section by the reaction force generated by the cleaning fluid being sprayed from the thrust hole to the top end of the sleeve section.

[0007] The movable tube and the sleeve section are closely spaced in the radial direction of the nozzle.

[0008] Wherein, a sealing ring is sleeved at the end of the movable tube and / or the starting end of the connecting hose, and the sealing ring and the outer tube are interference-fitted in the radial direction of the nozzle.

[0009] The movable tube is provided with inner spray holes on its peripheral wall, and the sleeve section is provided with outer spray holes arranged at intervals along the length direction of the sleeve section. Driven by the movable tube, the inner spray holes move left and right along the length direction of the sleeve section and align with different outer spray holes during the movement. The cleaning fluid enters the movable tube from the connecting hose and passes through the inner spray holes and is sprayed out from the outer spray holes aligned with the inner spray holes.

[0010] Wherein, the aperture of the outer spray hole is not smaller than the aperture of the inner spray hole.

[0011] There is an angle of 40° to 60° between the opening path of the inner spray hole on the peripheral wall of the movable tube and the axial section of the impeller passing through the axis of the movable tube.

[0012] There is also an angle of 40° to 60° between the opening path of the external spray hole on the peripheral wall of the sleeve section and the axial section of the impeller passing through the axis of the sleeve section.

[0013] Wherein, the movable tube and the set section are coaxially arranged.

[0014] There is an angle of 5° to 35° between the opening path of at least part of the external spray holes on the peripheral wall of the sleeve section and the cross section of the impeller passing through the external spray holes.

[0015] Wherein, the sleeve section is further provided with a nozzle protruding outward at the outer spray hole, and an angle of 5° to 35° exists between the nozzle and the cross section of the impeller passing through the outer spray hole.

[0016] Wherein, the sleeve section is arranged transversely along the axial direction of the volute.

[0017] Wherein, the liquid is at least one of amalgam, bromobenzene, silicone oil and water.

[0018] According to the technical scheme described in the utility model, the following beneficial effects are achieved: a thrust hole is provided on the closed end face of the movable tube, and the closed end face can be pushed away from the top of the sleeve section by the reaction force, and the closed end face is pressed to the top of the sleeve section by the gravity of the liquid in the injection section. Compared with the method of resetting the inner tube by a spring in the prior art, the utility model is more durable and has a longer service life; the movable tube moves left and right in the sleeve section and drives the inner spray hole to correspond to the outer spray hole, which solves the problem that if dense spray holes are opened on the full stroke of the sleeve section due to the small pump capacity, it is easy to produce insufficient spray force or too large spray hole spacing to connect the points to clean the entire axial width of the impeller; on the other hand, the movable tube moves left and right in the sleeve section, and the inner spray hole corresponds to different outer spray holes, so that the outer spray holes on the full stroke of the sleeve section can spray sufficiently powerful cleaning fluid at different time points, and the oil cleaning effect of the impeller is remarkable. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the structure of a volute fan using the impeller cleaning device in this application.

[0020] Figure 2 Schematic diagram of the side structure of a volute blower using the impeller cleaning device at the beginning of the cleaning cycle.

[0021] Figure 3 for Figure 2 Enlarged view of part A in the middle.

[0022] Figure 4 Schematic diagram of the side structure of a volute blower using an impeller cleaning device in the middle of a cleaning cycle.

[0023] Figure 5 for Figure 4 Enlarged view of part B in the middle.

[0024] Figure 6 Schematic diagram of the side structure of a volute blower using the impeller cleaning device at the end of the cleaning cycle.

[0025] Figure 7 for Figure 6 Enlarged view of part C in the middle.

[0026] 1 volute, 2 nozzle, 21 inner tube, 211 movable tube, S closed end surface, 2110 thrust hole, 212 connecting hose, 22 outer tube, 221 set section, 222 injection section, 3 impeller, 4 liquid, X inner spray hole, Y outer spray hole, Z nozzle. DETAILED DESCRIPTION

[0027] The technical solution of the utility model is further described below in conjunction with the accompanying drawings:

[0028] See also Figures 1 to 7As shown, an impeller cleaning device for a volute fan includes a nozzle 2, the nozzle 2 sprays a cleaning fluid toward an impeller 3 located in a volute 1, the nozzle 2 includes an inner tube 21 and an outer tube 22 sleeved on the inner tube 21, the inner tube 21 includes a movable tube 211 and a connecting hose 212, the top of the movable tube 211 is formed with a closed end surface S, the closed end surface S is provided with a thrust hole 2110, the end of the movable tube 211 is connected to the connecting hose 212, the diameter of the connecting hose 212 is smaller than the diameter of the movable tube 211, and the outer tube 22 includes a closed top and a straight The movable tube 211 is provided with a sleeve section 221 extending for a distance and a liquid injection section 222 which is bent and continues to extend upward, the movable tube 211 is installed in the sleeve section 221 and moves left and right along the length direction of the sleeve section 221, and liquid 4 is injected into the gap formed by the liquid injection section 222 and the connecting hose 212 to press the closed end surface S of the movable tube 211 to the top of the sleeve section 221 by the gravity of the liquid 4, and the closed end surface S is pushed away from the top of the sleeve section 221 by the reaction force generated by the cleaning fluid sprayed from the thrust hole 2110. In the present application, a thrust hole is opened on the closed end surface of the movable tube, and the reaction force generated by the spraying of the cleaning fluid is used to push the closed end surface away from the top of the sleeve section, and the closed end surface is pressed to the top of the sleeve section by the gravity of the liquid in the liquid injection section. Compared with the method of resetting the inner tube by a spring in the prior art, the movable tube 211 is more durable and has a longer service life. In the present application, the movable tube moves left and right in the suit section and drives the inner spray holes to correspond to the outer spray holes. On the one hand, it solves the problem that if dense spray holes are opened on the full stroke of the suit section due to the small pump capacity, it is easy to produce insufficient spray force or the spray holes on the suit section are too far apart to connect the points into a line to clean the entire axial width of the impeller; on the other hand, the movable tube moves left and right in the suit section, and the inner spray holes correspond to different outer spray holes, so that the outer spray holes on the full stroke of the suit section can spray sufficiently powerful cleaning fluid at different time points, and the oil cleaning effect of the impeller is more significant.

[0029] See also Figures 2 to 7 As shown, the movable tube 211 and the sheath section 221 are closely spaced in the radial direction of the nozzle 2. In the present application, the movable tube and the sheath section are closely spaced in the radial direction of the nozzle, so that the gap between the movable tube and the sheath section is very small but does not affect the sliding of the movable tube in the sheath section. Even if liquid is injected into the liquid injection section, the surface tension of the liquid prevents the liquid from flowing into the gap between the movable tube and the sheath section, and does not affect the pressure of the liquid acting on the end of the movable tube to press the closed end surface against the top of the sheath section.

[0030] In another embodiment, a sealing ring is also sleeved at the end of the movable tube 211 and / or the starting end of the connecting hose 212, and the sealing ring and the outer tube 22 are interference fit in the radial direction of the nozzle 2. In the present application, the setting of the sealing ring can prevent the liquid from flowing into the gap between the movable tube and the sleeve section when the movable tube moves left and right, and the circumferential positioning between the movable tube and the sleeve section can be achieved through the sealing ring. Preferably, the end of the connecting hose 212 is also connected to a steam generator, a booster pump and a water tank, and the water tank is filled with an aqueous solution with a cleaning agent, and the amount of steam is controlled by the amount of water output of the water pump pumped to the steam generator.

[0031] See also Figures 2 to 7 As shown, the peripheral wall of the movable tube 211 is provided with an inner spray hole X, and the peripheral wall of the set section 221 is provided with outer spray holes Y arranged at intervals along the length direction of the set section 221. The inner spray holes X move left and right along the length direction of the set section 221 driven by the movable tube 211 and align with different outer spray holes Y during the movement. The cleaning fluid enters the movable tube 211 from the connecting hose 212 and passes through the inner spray holes X and is sprayed from the outer spray holes Y aligned with the inner spray holes X. Preferably, the inner spray holes X are also arranged at intervals along the length direction of the movable tube 211, so as to achieve the purpose of multiple inner spray holes working simultaneously. Preferably, the inner spray holes X are aligned with the outer spray holes Y arranged at intervals on the set section 221 in sequence during the movement. When a plurality of inner spray holes X arranged at intervals are provided on the movable tube 211, for example, the inner spray holes X near the top of the movable tube 211 cannot move to some outer spray holes Y located at the end opposite to the top of the set section 221 due to the length of the movable tube 211 itself, but the inner spray holes X near the end of the movable tube 211 can reach here, so it does not affect the final effect that the set section can achieve the complete cleaning of the entire axial width of the impeller. Preferably, the number of the inner spray holes X is between 3 and 8, and the cleaning fluid with sufficient force can be sprayed based on the capacity of the pump.

[0032] See also Figures 2 to 7 As shown, the aperture of the outer spray hole Y is not smaller than the aperture of the inner spray hole X.

[0033] See also Figure 1 As shown, there is an angle of 40° to 60° between the opening path of the inner spray hole X on the peripheral wall of the movable tube 211 and the axial section of the impeller 3 passing through the axis of the movable tube 211. With this technical solution, the spray angle of the inner spray hole is offset, which can just clean the inner corner of each blade on the impeller, and the cleaning effect is better and more accurate.

[0034] See also Figure 1As shown, there is also an angle α of 40° to 60° between the opening path of the outer spray hole Y on the peripheral wall of the set section 221 and the axial section of the impeller 3 passing through the axis of the set section 221. In the present application, this structural design is adopted so that the cleaning fluid sprayed from the inner spray hole can be sprayed out from the outer spray hole without turning, which more effectively ensures that the inner corner of the impeller can be cleaned in place and the impeller can be slowly driven to rotate around its axial direction. Especially when the aperture of the outer spray hole is large, the opening path of the outer spray hole has no effect on the spray angle or even the spray force of the cleaning fluid.

[0035] See also Figures 2 to 7 As shown, the movable tube 211 and the sleeve section 221 are coaxially arranged.

[0036] See also Figures 2 to 7 As shown, there is an angle β of 5° to 35° between the opening path of at least part of the external spray holes Y on the peripheral wall of the sleeve section 221 and the cross section of the impeller 3 passing through the external spray holes Y. In the present application, by offsetting the opening path of the external spray holes relative to the cross section of the impeller passing through the external spray holes, the cleaning fluid can be swept to both axial ends of the impeller as much as possible, thereby expanding the cleaning width of the external spray holes in the axial direction of the impeller and cleaning more thoroughly. In addition, there is also an angle α of 40° to 60° between the opening path of the external spray holes and the axial section of the impeller passing through the axis of the sleeve section, so that the impeller cleaning effect is more thorough and clean than in the prior art.

[0037] See also Figure 3 , 5As shown in Figures 7 and 8, the sleeve section 221 is further provided with a nozzle Z protruding outward at the outer spray hole Y, and an angle of 5° to 35° exists between the nozzle Z and the cross section of the impeller 3 passing through the outer spray hole Y. Preferably, the offset angles of the nozzle Z relative to the cross section of the impeller 3 passing through the outer spray hole Y can be the same or opposite, for example, the offset angles between adjacent nozzles Z can be the same or opposite, or the offset angles between a specific number of nozzles Z can be the same or opposite. Preferably, the height of the nozzle Z is at least 1.5 mm. In the present application, the setting of the nozzle can guide the high-temperature steam / water to be discharged from the nozzle without being retained in the gap between the movable tube and the suit section (for example, the narrow nozzle of the nozzle has a Venturi effect, so that according to the principle of the continuity equation in fluid mechanics, the nozzle can quickly guide the high-temperature steam / water to the nozzle), avoiding scaling in the gap between the movable tube and the suit section, and ensuring that the movable tube can effectively move left and right in the suit section for a long time. Moreover, after the life test of the National CNAS Laboratory, when tap water is used as the cleaning water solution, it can still be ensured that the movable tube can still move smoothly left and right in the suit section after 5000 reciprocating movements (for example, the movable tube needs 10 reciprocating movements for one descaling, and the user performs descaling once a week, then 5000 reciprocating movements are equivalent to 10 years of use time of the range hood or integrated stove, which is much longer than the 8 years of use time specified in the national standard).

[0038] See also Figures 1 to 7 As shown, the sleeve section 221 is arranged transversely along the axial direction of the volute 1 .

[0039] See also Figures 2 to 7 As shown, the liquid 4 is at least one of amalgam, bromobenzene, silicone oil and water. Preferably, when the liquid 4 is amalgam, a water seal can be made at the top liquid surface of the amalgam, and the toxicity of the amalgam can be ensured as low as possible. Preferably, when the liquid 4 is bromobenzene, a water seal can be made at the top liquid surface of the bromobenzene to prevent toxic volatilization.

[0040] The working principle of the technical solution described in the present application is as follows: with the start of the cleaning cycle, the amount of steam / water entering the movable tube from the connecting hose gradually increases, causing the steam / water ejected from the thrust hole and impacting the top of the suit section with increasing force, thereby pushing the movable tube away from the top of the suit section. The movable tube moves slowly in the suit section so that the inner spray hole corresponds to the outer spray hole in sequence, and the steam / water sprayed toward the impeller gradually connects the points into a line and eventually runs through the entire axial width of the impeller; when the cleaning cycle is about to end, the amount of steam / water in the movable tube gradually decreases, and the movable tube is gradually pushed back to its original position under the action of the gravity of the liquid, preparing for the next cleaning cycle.

[0041] Although the specific implementation modes of the present invention have been described above, those skilled in the art may modify the implementation modes without departing from the technical solutions described in the present invention. The protection scope of the present invention is defined by the claims and their equivalents.

Claims

1. An impeller cleaning device for a volute fan, comprising a nozzle, wherein the nozzle sprays a cleaning fluid toward the impeller located in the volute, wherein: The nozzle comprises an inner tube and an outer tube sleeved on the inner tube, the inner tube comprises a movable tube and a connecting hose, a closed end face is formed at the top end of the movable tube, a thrust hole is formed on the closed end face, the end of the movable tube is connected with the connecting hose, the diameter of the connecting hose is smaller than the diameter of the movable tube, the outer tube comprises a sleeve section with a closed top end extending a certain distance in a straight line and a liquid injection section which is bent and continues to extend upward, the movable tube is installed in the sleeve section and moves left and right along the length direction of the sleeve section, liquid is injected into the gap formed by the liquid injection section and the connecting hose so that the closed end face of the movable tube is pressed to the top end of the sleeve section by the gravity of the liquid, and the closed end face is pushed away from the top end of the sleeve section by the reaction force generated by the cleaning fluid being sprayed from the thrust hole to the top end of the sleeve section.

2. The impeller cleaning device for a volute fan according to claim 1, characterized in that: The movable tube and the sleeve section are closely spaced apart in a radial direction along the nozzle.

3. The impeller cleaning device for a volute fan according to claim 1, characterized in that: A sealing ring is also sleeved on the end of the movable tube and / or the starting end of the connecting hose, and the sealing ring is interference-fitted with the outer tube in the radial direction of the nozzle.

4. The impeller cleaning device for a volute fan according to any one of claims 1 to 3, characterized in that: The movable tube is provided with an inner spray hole on its peripheral wall, and the sleeve section is provided with outer spray holes arranged at intervals along the length direction of the sleeve section. Driven by the movable tube, the inner spray holes move left and right along the length direction of the sleeve section and align with different outer spray holes during the movement. The cleaning fluid enters the movable tube from the connecting hose and passes through the inner spray hole and is sprayed out from the outer spray hole aligned with the inner spray hole.

5. The impeller cleaning device for a volute fan according to claim 4, characterized in that: The diameter of the outer spray hole is not less than the diameter of the inner spray hole.

6. The impeller cleaning device for a volute fan according to claim 4, characterized in that: An angle of 40° to 60° exists between an opening path of the inner spray hole on the peripheral wall of the movable tube and an axial section of the impeller passing through the axis of the movable tube.

7. The impeller cleaning device for a volute fan according to claim 6, characterized in that: There is also an angle of 40° to 60° between the opening path of the external spray hole on the peripheral wall of the sleeve section and the axial section of the impeller passing through the axis of the sleeve section.

8. The impeller cleaning device for a volute fan according to claim 7, characterized in that: The movable tube and the sleeve section are coaxially arranged.

9. The impeller cleaning device for a volute fan according to any one of claims 6 to 8, characterized in that: There is an angle of 5° to 35° between the opening path of at least part of the external spray holes on the peripheral wall of the sleeve section and the cross section of the impeller passing through the external spray holes.

10. The impeller cleaning device for a volute fan according to claim 9, characterized in that: The sleeve section is further provided with a nozzle protruding outward at the outer spray hole, and an angle of 5° to 35° exists between the nozzle and the cross section of the impeller passing through the outer spray hole.

11. The impeller cleaning device for a volute fan according to any one of claims 1 to 3, 5 to 8, and 10, characterized in that: The sleeve section is arranged transversely along the axial direction of the volute.

12. The impeller cleaning device for a volute fan according to any one of claims 1 to 3, 5 to 8, and 10, characterized in that: The liquid is at least one of amalgam, bromobenzene, silicone oil and water.

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