Cleaning method and cleaning structure of oil fume extraction equipment and oil fume extraction equipment

Abstract

The present application belongs to the technical field of oil fume extraction equipment, and discloses a cleaning method, a cleaning structure and an oil fume extraction equipment. The cleaning method comprises a steam cleaning step: step S101, adding cold water to a heating device; step S102, controlling the heating device to operate to heat the cold water to form hot steam; step S103, controlling the hot steam to be sprayed towards an impeller of the oil fume extraction equipment; after the steps S101 to S103 are repeatedly executed for a preset number of times, the steam cleaning step is ended. The nozzle of the cleaning structure is connected with a steam outlet of the heating device through a cleaning pipe, the cleaning pipe is provided with a steam control valve, a driving pump and a cleaning control valve; a water outlet end of a water supply pipe is connected to the cleaning pipe, a liquid inlet pipe is connected between a liquid inlet and outlet of the heating device and the cleaning pipe, the water supply pipe is provided with a water supply control valve, and the liquid inlet pipe is provided with a liquid inlet control valve. The present application can reduce the cost of the cleaning structure, improve the cleaning efficiency, and reduce the floor space occupied by the cleaning structure.

Description

Technical Field

[0001] The present invention relates to the technical field of oil fume extraction, and in particular to a cleaning method and a cleaning structure of oil fume extraction equipment and the oil fume extraction equipment. Background Art

[0002] During the use of the range hood, a large amount of oil will accumulate in the range hood body and on the impeller. This oil is not conducive to the cleanliness and hygiene of the range hood. Moreover, the oil on the impeller will affect the impeller's rotation speed, the smoke extraction effect and the service life of the motor. In addition, too much oil accumulated on the impeller will cause the range hood's motor to be overloaded, which will cause the motor to heat up, the wires to short-circuit, the motor to burn out and even cause a fire.

[0003] In order to clean the oil stains on the impeller, the existing technology provides a range hood with a cleaning device, which includes a steam generator, a water supply pipe and a steam pipe. The water supply pipe provides cold water to the inside of the steam generator. The steam generator heats the cold water to generate steam, and the steam is sprayed toward the impeller through the steam pipe to achieve steam immersion and cleaning of the impeller.

[0004] However, the cleaning device provided by the prior art has a large impeller size, and a large amount of steam is required to soak the impeller. Therefore, the size requirement of the steam generator is high, resulting in a large space occupation and high cost of the cleaning device. At the same time, since it takes a long time to heat a large amount of water to form steam, the entire cleaning process is time-consuming, which is not conducive to improving the cleaning efficiency. Summary of the Invention

[0005] One of the technical problems solved by the present invention is to provide a cleaning method for oil fume extraction equipment, which can effectively solve the problems of large space occupied by the cleaning structure and low cleaning efficiency caused by existing steam washing, reduce the space occupied by the cleaning structure, improve the cleaning efficiency and reduce the cleaning cost.

[0006] The second technical problem solved by the present invention is to provide a cleaning structure that can effectively solve the problems of large space occupied by the cleaning structure and low cleaning efficiency caused by existing steam washing, reduce the space occupied by the cleaning structure, improve cleaning efficiency and reduce cleaning costs.

[0007] The third technical problem solved by the present invention is to provide an oil fume extraction device, which can effectively solve the problem of large space occupied by the cleaning structure and low cleaning efficiency caused by existing steam washing, reduce the space occupied by the cleaning structure, improve cleaning efficiency and reduce cleaning costs.

[0008] The first technical problem mentioned above is solved by the following technical solution:

[0009] A method for cleaning oil fume extraction equipment, comprising a steam washing step;

[0010] Wherein, the steam washing step comprises:

[0011] Step S101, adding cold water to the heating device;

[0012] Step S102: controlling the heating device to operate and heat the cold water to form hot steam;

[0013] Step S103: Control the hot steam to spray toward the impeller of the oil fume extraction device;

[0014] After repeating steps S101 to S103 for a preset number of times, the steam washing step ends.

[0015] The cleaning method of the oil fume extraction equipment of the present invention has the following beneficial effects compared with the background technology: by performing the steam washing step, steam can be sprayed to the impeller when the impeller needs to be cleaned, so that the impeller is immersed in the steam, thereby facilitating the high temperature of the steam to soften and clean the oil stains attached to the impeller, reducing the adhesion of the oil stains on the impeller, thereby better ensuring the operating efficiency of the impeller and the operating reliability of the fan; at the same time, since the steam washing step includes steps S101, S102 and S103 that are repeatedly performed multiple times, it is not necessary to provide a large amount of steam that can completely immerse the impeller at one time when performing step S103, reducing the number of times step S1 is performed each time. 03, thereby reducing the amount of cold water added to the heating device each time step S101 is executed, thereby reducing the volume requirement for the heating chamber of the heating device and reducing the size requirement for the heating device, thereby reducing the footprint of the entire cleaning structure; secondly, since the amount of cold water added to the heating device each time is small, the time required for the heating device to heat and evaporate the cold water to form hot steam is shorter, thereby effectively shortening the time required to supply steam to the impeller, thereby improving the cleaning efficiency; furthermore, the heating device heats a small amount of cold water each time, which can effectively reduce the power consumption required by the heating device, thereby reducing the power consumption required for the entire cleaning process and reducing the cleaning cost.

[0016] In one embodiment, the cleaning method includes a first rinsing step and / or a second rinsing step;

[0017] Wherein, the first flushing step comprises:

[0018] Step S201: adding a cleaning agent to the heating device;

[0019] Step S202: controlling the heating device to operate and heat the cleaning agent;

[0020] Step S203, controlling the heated cleaning agent to spray toward the impeller;

[0021] Step S204: adding cold water to the heating device;

[0022] Step S205: controlling the heating device to operate and heat the cold water;

[0023] Step S206: Control the heated water to spray toward the impeller;

[0024] The second washing step comprises:

[0025] Step S301: adding cleaning agent and cold water to the heating device;

[0026] Step S302: controlling the heating device to operate and heat the mixture of the cleaning agent and the cold water;

[0027] Step S303: Control the heated mixed liquid to spray toward the impeller.

[0028] In one embodiment, the step S206 specifically includes: after completing the step S203 and after a preset time interval, controlling the heated water to spray toward the impeller, and the sum of the execution time of the step S205 and the step S204 is shorter than the preset time interval.

[0029] In one embodiment, the cleaning method further comprises:

[0030] Determine a selection of a cleaning mode, wherein the cleaning mode includes an enhanced washing mode and a normal washing mode;

[0031] When the enhanced washing mode is selected, the steam washing step and the first rinsing step are performed in sequence;

[0032] When the normal washing mode is selected, the first flushing step or the second flushing step is performed.

[0033] In one embodiment, the selection of the cleaning mode is determined by one of the following methods:

[0034] detecting the oil contamination degree of the impeller, and determining a cleaning mode based on the oil contamination degree;

[0035] Alternatively, obtaining a cleaning interval duration from the most recent cleaning, and determining a cleaning mode based on the cleaning interval duration;

[0036] Alternatively, a user's selection operation input for a cleaning mode is obtained, and the selection of the cleaning mode is determined based on the selection operation input.

[0037] In one embodiment, the cleaning mode further includes a quick-wash mode, and the cleaning method further includes:

[0038] When the normal washing mode is selected, performing the first rinsing step;

[0039] When the quick wash mode is selected, the second flushing step is performed.

[0040] The second technical problem mentioned above is solved by the following technical solution:

[0041] A cleaning structure, characterized in that it includes a controller and a cleaning device, the cleaning device includes a nozzle, a heating device, a water supply pipe, a liquid inlet pipe and a cleaning pipe, the nozzle is connected to the steam outlet of the heating device through the cleaning pipe, and the cleaning pipe is provided with a steam control valve, a drive pump and a cleaning control valve;

[0042] The water outlet end of the water supply pipe is connected to the cleaning pipe, and the liquid inlet pipe is connected between the liquid inlet and outlet of the heating device and the cleaning pipe, and the steam control valve, the water outlet end of the water supply pipe, the driving pump, the water inlet end of the liquid inlet pipe and the cleaning control valve are sequentially arranged along the fluid flow direction of the cleaning pipe, the water supply pipe is provided with a water supply control valve, and the liquid inlet pipe is provided with a liquid inlet control valve;

[0043] The steam control valve, the cleaning control valve, the water supply control valve, the liquid inlet control valve and the driving pump are all electrically connected to the controller;

[0044] The controller is used to perform the steam washing step in the above-mentioned cleaning method, specifically:

[0045] Step S101: Control the steam control valve and the cleaning control valve to be closed, and control the water supply control valve, the liquid inlet control valve, and the driving pump to be opened, so as to add cold water to the heating device;

[0046] Step S102: Control the water supply control valve and the liquid inlet control valve to close and the drive pump to stop working, and control the heating device to operate to heat the cold water to form hot steam;

[0047] Step S103: controlling the steam control valve, the cleaning control valve, and the driving pump to open, so as to control the hot steam to spray toward the impeller of the oil fume extraction device;

[0048] After repeating steps S101 to S103 for a preset number of times, the execution ends.

[0049] Compared with the background technology, the cleaning structure described in the present invention has the following beneficial effects: since the above-mentioned cleaning method is used for steam cleaning, the volume and power requirements of the heating device in the cleaning structure can be reduced, the floor space of the cleaning structure can be reduced, the cleaning efficiency of the cleaning structure for the fan can be improved, and the cleaning cost of the cleaning structure can be reduced; at the same time, since the liquid inlet end of the liquid inlet pipe is connected to the cleaning pipe and is located between the cleaning control valve and the drive pump, the water outlet end of the water supply end is connected to the cleaning pipe and is located between the drive pump and the steam control valve, a drive pump is used to realize the liquid inlet drive of the heating device and the flow drive of the steam to the cleaning pipe, which reduces the drive cost, ensures the drive reliability, and can effectively shorten the total pipeline length of the cleaning structure, better realize the integrated layout of each pipeline, improve the structural compactness of the cleaning structure, and further reduce the floor space of the cleaning structure.

[0050] In one embodiment, the cleaning device further includes a cleaning agent pipe and a liquid outlet pipe, the liquid outlet end of the cleaning agent pipe is connected to the cleaning pipe and is located between the steam control valve and the driving pump, the cleaning agent pipe is provided with a cleaning agent control valve, the liquid inlet end of the liquid outlet pipe is connected to the liquid inlet and outlet, the liquid outlet end of the liquid outlet pipe is connected to the cleaning pipe and is located between the driving pump and the steam control valve, and the liquid outlet pipe is provided with a liquid outlet control valve;

[0051] The cleaning agent control valve and the liquid outlet control valve are both electrically connected to the controller, and the controller is further configured to execute a first flushing step and a second flushing step. The first flushing step specifically includes:

[0052] Step S201: Control the cleaning agent control valve, the liquid inlet control valve, and the driving pump to be open, and the cleaning control valve, the water supply control valve, the steam control valve, and the liquid outlet control valve to be closed, so as to add cleaning agent to the heating device;

[0053] Step S202: Control the cleaning agent control valve, the liquid inlet control valve, and the driving pump to be closed, and control the heating device to operate to heat the cleaning agent;

[0054] Step S203: Control the heating device to stop running, and control the liquid outlet control valve, the cleaning control valve and the driving pump to start, so as to spray the heated cleaning agent toward the impeller;

[0055] Step S204: controlling the water supply control valve, the liquid inlet control valve, and the driving pump to start, and controlling the liquid outlet control valve and the cleaning control valve to close, so as to add cold water into the heating device;

[0056] Step S205: Control the water supply control valve, the liquid inlet control valve, and the drive pump to be closed, and control the heating device to operate to heat the cold water into hot water;

[0057] Step S206: Control the heating device to stop running, and control the liquid outlet control valve, the cleaning control valve, and the driving pump to start, so as to spray the heated water toward the impeller;

[0058] The second flushing step specifically includes:

[0059] Step S301: Control the water supply control valve, the cleaning agent control valve, the liquid inlet control valve, and the driving pump to start, and control the steam control valve, the liquid outlet control valve, and the cleaning control valve to close, so as to add cleaning agent and cold water into the heating device;

[0060] Step S302: Control the water supply control valve, the cleaning agent control valve, the liquid inlet control valve, and the driving pump to be closed, and control the heating device to operate to heat the mixture of cleaning agent and cold water;

[0061] Step S303: Control the liquid outlet control valve, the cleaning control valve, and the driving pump to open, so as to spray the heated mixed liquid toward the impeller.

[0062] In one embodiment, the cleaning device further comprises a drain pipe, wherein a liquid inlet end of the drain pipe is connected to the cleaning pipe and is located between the drive pump and the cleaning control valve, a liquid outlet end of the drain pipe is connected to the water supply pipe and is located upstream of the water supply control valve, and a drain control valve is provided on the drain pipe (, and the drain control valve is communicatively connected to the controller;

[0063] The controller is also used to execute the drainage step, which specifically includes: controlling the drainage control valve, the liquid outlet control valve and the driving pump to start, and controlling the liquid inlet control valve, the steam control valve, the water supply control valve, the cleaning agent control valve and the cleaning control valve to close, so that the liquid inside the heating device is discharged to the water supply pipe through the liquid outlet pipe, the cleaning pipe and the drainage pipe in sequence.

[0064] In one embodiment, the heating chamber of the heating device is connected to a first air pressure balance pipe and a second air pressure balance pipe, the first air pressure balance pipe is provided with an air outlet one-way valve, the air outlet one-way valve only allows the gas in the heating chamber to flow out to the outside, and the second air pressure balance pipe is provided with an air inlet one-way valve, the air inlet one-way valve only allows air to flow from the outside to the heating chamber.

[0065] In one embodiment, the first end of the first gas pressure equalization pipe is connected to the cleaning pipe and is located upstream of the steam control valve;

[0066] And / or, the second end of the first air pressure balance pipe is connected to the water supply pipe and is located upstream of the water supply control valve.

[0067] The third technical problem mentioned above is solved by the following technical solution:

[0068] A fume extraction device comprises a fan and the cleaning structure as described above, wherein the nozzle is arranged toward the impeller of the fan, and the controller controls the cleaning device to clean the impeller.

[0069] Compared with the background technology, the oil fume extraction equipment described in the present invention has the following beneficial effects: by adopting the above-mentioned cleaning structure, the impeller can be cleaned, the long-term performance of the oil fume extraction equipment can be improved, and the safety and reliability of the use of the oil fume extraction equipment can be improved; at the same time, the space occupied by the cleaning structure in the oil fume extraction equipment can be reduced, the overall structural compactness of the oil fume extraction equipment can be improved, and the use cost of the oil fume extraction equipment can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0070] Figure 1 This is a flow chart of the cleaning method provided in Example 1 of the present invention;

[0071] Figure 2 This is a flow chart of the steam washing step in the cleaning method provided in Example 1 of the present invention;

[0072] Figure 3 This is a flow chart of the first rinsing step in the cleaning method provided in Example 1 of the present invention;

[0073] Figure 4 This is a flow chart of the second flushing step in the cleaning method provided in Example 1 of the present invention;

[0074] Figure 5 Schematic diagram of the structure of the cleaning device provided in the second embodiment of the present invention;

[0075] Figure 6 Schematic diagram of the structure of the cleaning device provided in the third embodiment of the present invention;

[0076] Figure 7 This is a schematic diagram of the disassembled structure of the cleaning device provided in the third embodiment of the present invention;

[0077] Figure 8 is a cross-sectional view of a cleaning device provided in a third embodiment of the present invention;

[0078] Figure 9 yes Figure 8 A partial enlarged view of point I in the middle;

[0079] Figure 10This is a schematic structural diagram of a box body provided in the third embodiment of the present invention;

[0080] Figure 11 is a cross-sectional view of a heating box provided in Example 3 of the present invention;

[0081] Figure 12 This is a schematic diagram of the partial structural disassembly of the heating device provided in the third embodiment of the present invention;

[0082] Figure 13 This is a partial structural diagram of the oil fume extraction device provided in the fourth embodiment of the present invention;

[0083] Figure 14 This is a schematic diagram of the disassembled structure of part of the oil fume extraction device provided in the fourth embodiment of the invention;

[0084] Figure 15 This is a structural diagram of a fan and a nozzle provided in a fourth embodiment of the present invention;

[0085] Figure 16 yes Figure 15 Cross-sectional view of the mid-structure;

[0086] Figure 17 yes Figure 16 A partial enlarged view of point J in the middle.

[0087] In the picture:

[0088] 100, cleaning device; 200, fan; 201, impeller; 202, volute; 300, electrical control box; 301, electrical control outer box; 302, control assembly; 400, bellows; 500, water supply box; 600, cleaning agent box;

[0089] 1. Nozzle; 11. Nozzle section; 12. Positioning section;

[0090] 2. Heating device; 21. Heating box; 211. Box body; 2111. Steam outlet; 212. Boss; 2121. Heating port; 213. Connecting pipe; 2131. Liquid inlet and outlet; 214. Steam pipe; 215. Heating chamber; 22. Heating unit; 23. Thermostat; 24. Sealing ring;

[0091] 3. Mounting box; 31. Box body; 311. Main box portion; 312. Mounting cavity; 3121. Heating mounting cavity; 3122. Pipe mounting cavity; 3123. Threading port; 3124. Pipe through hole; 3125. Air hole; 313. Partitioning member; 314. Positioning protruding ring portion; 315. First flange portion; 32. Cover; 321. Main cover portion; 322. Second flange portion; 323. Positioning ring portion;

[0092] 4. Pipeline assembly; 41. Drive pump; 42. Liquid inlet pipe; 43. Water supply pipe; 44. Cleaning pipe; 45. Liquid outlet pipe; 46. Cleaning agent pipe; 47. Drain pipe; 48. First air pressure balance pipe; 49. Second air pressure balance pipe; 401. Steam control valve; 402. Cleaning control valve; 403. Water supply control valve; 404. Liquid inlet control valve; 405. Cleaning agent control valve; 406. Air outlet check valve; 407. Air inlet check valve; 408. Liquid outlet control valve; 409. Drain control valve; 410. Cleaning check valve. DETAILED DESCRIPTION

[0093] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all structures.

[0094] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0095] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0096] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are used to refer to positions or locations based on those shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0097] Example 1

[0098] like Figures 1 to 4 As shown, this embodiment provides a method for cleaning an oil fume exhaust device, which uses a cleaning structure to clean the inside of a fan in the oil fume exhaust device to reduce the adhesion of oil stains inside the fan, thereby ensuring the operating efficiency and reliability of the fan.

[0099] Specifically, in this embodiment, the cleaning method includes a steam cleaning step S100, wherein the steam cleaning step S100 includes:

[0100] Step S101, adding cold water to the heating device;

[0101] Step S102: Control the operation of the heating device to heat the cold water to form hot steam;

[0102] Step S103, controlling the hot steam to spray toward the impeller of the oil fume extraction equipment;

[0103] After repeating steps S101 to S103 for a preset number of times, the steam washing step ends.

[0104] The cleaning method provided in this embodiment, by performing the steam washing step, can spray steam to the impeller when it is necessary to clean the impeller, so that the impeller is immersed in the steam, thereby facilitating the high temperature of the steam to soften and clean the oil stains attached to the impeller, reducing the adhesion of the oil stains on the impeller, thereby better ensuring the operating efficiency of the impeller and the operating reliability of the fan; at the same time, since the steam washing step S100 includes steps S101, S102 and S103 that are repeatedly performed multiple times, when performing step S103, it is not necessary to provide a large amount of steam that can completely immerse the impeller at one time, thereby reducing the amount of steam required for each execution of step S103. This can reduce the amount of cold water added to the heating device each time step S101 is executed, thereby reducing the volume requirement for the heating chamber of the heating device and the size requirement for the heating device, thereby reducing the footprint of the entire cleaning structure; secondly, since the amount of cold water added to the heating device each time is small, the time required for the heating device to heat the cold water and evaporate it to form hot steam is shorter, thereby effectively shortening the time required to supply steam to the impeller, thereby improving the cleaning efficiency; furthermore, the heating device heats a small amount of cold water each time, which can effectively reduce the power consumption required by the heating device, thereby reducing the power consumption required for the entire cleaning process and reducing the cleaning cost.

[0105] In one embodiment, the preset number of times is 2 to 10. It is understood that the preset number of times can be specifically determined according to the volume of the heating chamber of the heating device, the rated heating power of the heating device, and the type of the oil fume extraction device, and the present invention does not limit this.

[0106] In order to realize repeated execution of the steam washing step, the steam washing step further comprises:

[0107] Step S104: determine whether the execution times are less than the preset times. If so, return to step S101; if not, execute step S105;

[0108] Step S105: End the steam washing step.

[0109] It is worth noting that the heating device is an existing device that can heat cold water to generate steam, including but not limited to a steam generator.

[0110] Furthermore, in step S103, the hot steam can be controlled to be sprayed toward the impeller by controlling the steam pressure generated by the heating device so that the hot steam is sprayed toward the impeller driven by the steam pressure. Alternatively, a driving pump can be provided on the steam outflow pipeline of the heating device to drive the steam in the heating device to flow toward the impeller.

[0111] In one embodiment, the steam outlet of the heating device is connected to a nozzle via a cleaning pipe, and the nozzle is positioned directly opposite the impeller. Step S103 specifically includes controlling the pressure and direction of the hot steam ejected from the nozzle so that the impeller rotates in the opposite direction under the pressure of the ejected steam. This configuration increases the contact area between the impeller and the steam through the reverse rotation of the impeller, thereby increasing the uniformity of steam soaking across the impeller and improving the cleaning effect on the impeller.

[0112] Furthermore, the temperature of the hot steam sprayed from the nozzle is not lower than 100° C., and the spraying pressure is not lower than 0.3 MPa, so as to ensure the driving effect on the impeller and the flushing effect on the impeller surface.

[0113] To further improve the cleaning effect of the impeller, in one embodiment, the cleaning method further includes a first rinsing step S200 and a second rinsing step S300, wherein the first rinsing step includes:

[0114] Step S201: adding a cleaning agent to the heating device;

[0115] Step S202: Control the heating device to heat the cleaning agent;

[0116] Step S203, controlling the heated cleaning agent to spray toward the impeller;

[0117] Step S204: adding cold water to the heating device;

[0118] Step S205: Control the heating device to heat the cold water;

[0119] Step S206: Control the heated water to spray toward the impeller;

[0120] The second rinse step includes:

[0121] Step S301: adding cleaning agent and cold water to the heating device;

[0122] Step S302: Control the heating device to heat the mixture of the cleaning agent and cold water;

[0123] Step S303: Control the heated mixed liquid to spray toward the impeller.

[0124] That is, the first flushing step S200 is to first spray hot detergent onto the impeller and then spray hot water onto the impeller to flush the impeller; the second flushing step S300 is to directly spray a mixture of water and detergent onto the impeller to flush the impeller.

[0125] The setting of the first flushing step S200 and the second flushing step S300 enables the impeller surface to be flushed by spraying liquid cleaning fluid onto the impeller, thereby further reducing the adhesion of oil stains on the impeller surface and improving the cleaning effect of the impeller.

[0126] In other embodiments, the cleaning method may also include only the first rinsing step or only the second rinsing step.

[0127] In one embodiment, the cleaning method further comprises:

[0128] Determine the selection of cleaning mode, which includes enhanced washing mode, normal washing mode and fast washing mode;

[0129] When the enhanced wash mode is selected, the steam wash step and the first rinse step are performed in sequence;

[0130] When the normal wash mode is selected, the first rinse step is performed;

[0131] When the quick wash mode is selected, a second rinse step is performed.

[0132] That is, in this embodiment, the oil fume extraction device has at least three cleaning modes:

[0133] When the enhanced washing mode is selected, the cleaning process is to sequentially execute the steam washing step S100 and the first rinsing step S200, that is, firstly, steam is introduced into the impeller to soak the impeller with steam, thereby softening the oil stains on the impeller; secondly, hot cleaning agent is sprayed onto the impeller, so that the grease in the oil stains can react with the high concentration of cleaning agent and gradually melt, thereby promoting the separation of the grease from the impeller surface; finally, hot water is sprayed onto the impeller, so that the hot water flushes and cleans the impeller, thereby promoting the separation of the oil stains on the impeller surface and achieving complete cleaning of the impeller surface.

[0134] When the conventional washing mode is selected, the cleaning process is as follows: first, hot detergent is sprayed onto the impeller, so that the grease in the oil stain can react with the high concentration of detergent and gradually melt, thereby promoting the separation of the grease from the impeller surface; then hot water is sprayed onto the impeller, so that the hot water flushes and cleans the impeller, thereby promoting the separation of the oil stain on the impeller surface and achieving the cleaning of the impeller surface.

[0135] When the quick wash mode is selected, the cleaning process is as follows: first, a mixture of hot detergent and water is formed, and then the mixture is sprayed onto the impeller to flush and clean the impeller.

[0136] From the above, it can be seen that the cleaning effects of the quick wash mode, regular wash mode, and enhanced wash mode are gradually enhanced, but the time and cost required for cleaning also increase. By setting three cleaning modes, the controller or the user can select the appropriate cleaning mode according to actual needs, thereby ensuring that the impeller is completely cleaned while reducing the cleaning cost and improving the flexibility of cleaning.

[0137] In other embodiments, the cleaning mode may also include only the enhanced washing mode and the normal washing mode, that is, the cleaning method includes:

[0138] Determine the selection of cleaning mode, which includes enhanced washing mode and normal washing mode;

[0139] When the enhanced wash mode is selected, the steam wash step and the first rinse step are performed in sequence;

[0140] When the normal wash mode is selected, the first flushing step or the second flushing step is performed.

[0141] To further improve the cleaning effect of the impeller, in one embodiment, the temperature of the heated hot water and / or the temperature of the heated cleaning agent ranges from 70°C to 100°C, preferably from 90°C to 100°C.

[0142] Furthermore, in step S203, step S206 and step S304, the fluid (hot water, detergent or a mixture of water and detergent) sprayed onto the impeller acts on the impeller and drives the impeller to rotate in the opposite direction, which can ensure that the fluid acts on all parts of the impeller, thereby improving the cleaning effect on all parts of the impeller, and further improving the flushing effect and flushing efficiency of the impeller.

[0143] In one embodiment, in order to further improve the flushing effect of the impeller in the first flushing step, step S206 specifically includes: after completing step S203 and after a preset time interval, controlling the heated water to spray onto the impeller, and the sum of the execution time of step S204 and step S205 is shorter than the preset time.

[0144] That is, when spraying hot detergent liquid onto the impeller, it is necessary to wait for a preset time before spraying hot water onto the impeller, so as to better ensure the effect of the detergent on the oil stains on the impeller surface, improve the dissolving effect of the detergent on the oil stains, thereby increasing the probability and efficiency of the oil stains being separated from the impeller surface when spraying hot water, and improving the impeller flushing effect.

[0145] In one embodiment, the selection of the cleaning mode is determined by one of the following methods:

[0146] Detect the oil contamination level of the impeller and determine the cleaning mode based on the oil contamination level;

[0147] Alternatively, the cleaning interval duration from the most recent cleaning is obtained, and the selection of the cleaning mode is determined based on the cleaning interval duration;

[0148] Alternatively, a user's selection operation input for a cleaning mode is obtained, and the selection of the cleaning mode is determined based on the selection operation input.

[0149] That is, the selection of the cleaning mode can be made by the controller in the oil fume extraction equipment according to the need of impeller cleaning, or the user can manually select the cleaning mode.

[0150] Specifically, in one embodiment, when a user triggers a cleaning command, the controller controls the detection device to detect the oil contamination level of the impeller. Based on the detection results, the controller determines the contamination level and thus determines the cleaning mode. In this setting, if the detected oil contamination level is high, the controller selects the enhanced cleaning mode; if the oil contamination level is medium, the controller selects the normal cleaning mode; and if the oil contamination level is low, the controller selects the quick cleaning mode.

[0151] In another embodiment, when a user triggers a cleaning command, the controller obtains the cleaning interval time since the most recent cleaning, thereby roughly judging the degree of impeller contamination based on the cleaning interval time and selecting a cleaning mode. Generally speaking, when the fume extraction device is operating normally, the longer the cleaning interval time, the more oil and dirt will adhere to the impeller, and the greater the need for effective oil cleaning.

[0152] Furthermore, the controller can preset a first interval length and a second interval length, where the second interval length is greater than the first interval length. When the cleaning interval length is greater than or equal to the second interval length, the enhanced cleaning mode is selected; when the cleaning interval length is less than the second interval length and greater than or equal to the first interval length, the normal cleaning mode is selected; and when the cleaning interval length is less than the first interval length, the quick cleaning mode is selected. For example, the first interval length is 5 to 10 days, and the second interval length is 20 to 40 days.

[0153] In another embodiment, the oil fume extraction device is provided with a mode selection component, through which the user can select a cleaning mode. The mode selection component can be, but is not limited to, a button, a knob, a touch panel, or the like that can receive user selection instructions.

[0154] It is worth noting that there are many ways for a user to trigger a command. For example, a user may trigger a cleaning command through a mobile terminal, through a control button set on the fume extraction device, or through a gesture command, voice command, etc. The present invention does not limit the way in which a user triggers a cleaning command.

[0155] Example 2

[0156] This embodiment provides a cleaning structure applied to an oil fume extraction device, which can be used to clean the fan in the oil fume extraction device to better ensure the long-term performance of the fan and improve the safety of the oil fume extraction device.

[0157] like Figure 5 As shown, in this embodiment, the cleaning structure includes a controller and a cleaning device 100 . The cleaning device 100 includes a nozzle 1 , a heating device 2 and a pipeline assembly 4 . The pipeline assembly 4 includes a water supply pipe 43 , a liquid inlet pipe 42 and a cleaning pipe 44 . The nozzle 1 is connected to the steam outlet 2111 of the heating device 2 through a cleaning pipe 44, and a steam control valve 401, a driving pump 41 and a cleaning control valve 402 are provided on the cleaning pipe 44; the water outlet end of the water supply pipe 43 is connected to the cleaning pipe 44, and the liquid inlet pipe 42 is connected between the liquid inlet and outlet 2131 of the heating device 2 and the cleaning pipe 44, and the steam control valve 401, the water outlet end of the water supply pipe 43, the driving pump 41, the water inlet end of the liquid inlet pipe 42 and the cleaning control valve 402 are arranged in sequence along the fluid flow direction of the cleaning pipe 44, a water supply control valve 403 is provided on the water supply pipe 43, and a liquid inlet control valve 404 is provided on the liquid inlet pipe 42; the steam control valve 401, the cleaning control valve 402, the water supply control valve 403, the liquid inlet control valve 404 and the driving pump 41 are all electrically connected to the controller.

[0158] The controller is used to perform the steam washing step of the cleaning method of Example 1, specifically:

[0159] Step S101, controlling the steam control valve 401 and the cleaning control valve 402 to be closed, and controlling the water supply control valve 403, the liquid inlet control valve 404 and the driving pump 41 to be opened, so as to add cold water to the heating device 2;

[0160] Step S102: Control the water supply control valve 403 and the liquid inlet control valve 404 to close and drive the pump 41 to stop working, and control the heating device 2 to operate to heat the cold water to form hot steam;

[0161] Step S103: Control the steam control valve 401 and the cleaning control valve 402 to open and drive the pump 41 to operate, so as to control the hot steam to spray toward the impeller of the oil fume extraction equipment;

[0162] After repeating steps S101 to S103 for a preset number of times, the execution ends.

[0163] The cleaning structure provided in this embodiment adopts the above-mentioned cleaning method for steam cleaning, which can reduce the volume and power requirements of the heating device 2 in the cleaning structure, reduce the floor space of the cleaning structure, improve the cleaning efficiency of the cleaning structure for the fan, and reduce the cleaning cost of the cleaning structure; at the same time, since the liquid inlet end of the liquid inlet pipe 42 is connected to the cleaning pipe 44 and is located between the cleaning control valve 402 and the drive pump 41, the water outlet end of the water supply end is connected to the cleaning pipe 44 and is located between the drive pump 41 and the steam control valve 401, thereby adopting a drive pump 41 to realize the liquid inlet drive of the heating device 2 and the flow drive of the steam to the cleaning pipe 44, reducing the drive cost, ensuring the drive reliability, and effectively shortening the total pipeline length of the cleaning structure, better realizing the integrated layout of each pipeline, improving the structural compactness of the cleaning structure, thereby further reducing the floor space of the cleaning structure.

[0164] In one embodiment, the cleaning device 100 also includes a cleaning agent pipe 46 and a liquid outlet pipe 45. The liquid outlet end of the cleaning agent pipe 46 is connected to the cleaning pipe 44 and is located between the steam control valve 401 and the driving pump 41. A cleaning agent control valve 405 is provided on the cleaning agent pipe 46. The liquid inlet end of the liquid outlet pipe 45 is connected to the liquid inlet and outlet 2131 of the lower part of the heating device 2. The liquid outlet end of the liquid outlet pipe 45 is connected to the cleaning pipe 44 and is located between the driving pump 41 and the steam control valve 401. A liquid outlet control valve 408 is provided on the liquid outlet pipe 45. The cleaning agent control valve 405 and the liquid outlet control valve 408 are both electrically connected to the controller.

[0165] The arrangement of the liquid outlet pipe 45 and the cleaning agent pipe 46 enables the controller to control the cleaning device 100 to perform the first flushing step and the second flushing step. At the same time, the liquid outlet end of the cleaning agent pipe 46 is connected to the cleaning pipe 44 and is located between the driving pump 41 and the steam control valve 401, so that when the cleaning agent is supplied to the heating device 2, the cleaning agent control valve 405 and the liquid inlet control valve 404 are opened, so that the driving pump 41 drives the cleaning agent to flow through the cleaning agent pipe 46, the cleaning pipe 44 and the liquid inlet pipe 42 in sequence to the heating device 2, thereby avoiding the need for an additional driving structure and facilitating the shortening of the length of the cleaning agent pipe 46, thereby realizing an integrated arrangement of the piping structure in the cleaning device 100; furthermore, the liquid outlet end of the liquid outlet pipe 45 is connected to the cleaning pipe 44 and is located between the driving pump 41 and the steam control valve 401, so that steam cleaning, hot water cleaning and cleaning agent spraying can share most of the piping of the cleaning pipe 44, further improving the piping integration in the cleaning device 100, reducing the floor space of the cleaning device 100, and reducing the structural cost of the cleaning device 100.

[0166] It is worth noting that the water inlet end of the water supply pipe 43 is connected to the water supply box 500 , and the liquid inlet end of the detergent pipe 46 is connected to the detergent box 600 .

[0167] The first flushing step specifically includes:

[0168] Step S201: Control the cleaning agent control valve 405, the liquid inlet control valve 404 and the driving pump 41 to be open, and the cleaning control valve 402, the water supply control valve 403, the steam control valve 401 and the drain control valve 409 to be closed, so as to add cleaning agent to the heating device 2;

[0169] Step S202: Control the cleaning agent control valve 405, the liquid inlet control valve 404 and the driving pump 41 to be closed, and control the heating device 2 to operate to heat the cleaning agent;

[0170] Step S203: Control the heating device 2 to stop running, and control the liquid outlet control valve 408, the cleaning control valve 402 and the driving pump 41 to start, so as to spray the heated cleaning agent toward the impeller;

[0171] Step S204: Control the water supply control valve 403, the liquid inlet control valve 404 and the driving pump 41 to start, and control the liquid outlet control valve 408 and the cleaning control valve 402 to close, so as to add cold water into the heating device 2;

[0172] Step S205: Control the water supply control valve 403, the liquid inlet control valve 404 and the driving pump 41 to be closed, and control the heating device 2 to operate to heat the cold water into hot water;

[0173] Step S206: Control the heating device 2 to stop running, and control the liquid outlet control valve 408, the cleaning control valve 402 and the driving pump 41 to start, so as to spray the heated water toward the impeller;

[0174] The second rinsing step specifically includes:

[0175] Step S301: Control the water supply control valve 403, the cleaning agent control valve 405, the liquid inlet control valve 404, and the drive pump 41 to start, and control the steam control valve 401, the liquid outlet control valve 408, and the cleaning control valve 402 to close, so as to add cleaning agent and cold water into the heating device 2;

[0176] Step S302: Control the water supply control valve 403, the detergent control valve 405, the liquid inlet control valve 404, and the drive pump 41 to be closed, and control the heating device 2 to operate to heat the mixture of detergent and cold water;

[0177] Step S303 , controlling the liquid outlet control valve 408 , the cleaning control valve 402 and the driving pump 41 to open, so as to spray the heated mixed liquid toward the impeller.

[0178] After cleaning, if liquid remains in the heating chamber 215 of the heating device 2, it is easy for bacteria to grow inside the heating chamber 215, affecting the use of the device for the next cleaning. In one embodiment, to drain the liquid from the heating device 2, the cleaning device 100 includes a drain pipe 47. The liquid inlet end of the drain pipe 47 is connected to the cleaning pipe 44 and is located between the drive pump 41 and the cleaning control valve 402. The liquid outlet end of the drain pipe 47 is connected to the water supply pipe 43 and is located upstream of the water supply control valve 403. The drain control valve 409 is in communication with the controller.

[0179] The setting of the drain pipe 47 can enable the liquid inside the heating device 2 to be discharged to the water supply pipe 43 through the cleaning pipe 44 and the drain pipe 47, and then flow into the water supply box 500 through the water supply pipe 43, thereby avoiding the accumulation of liquid in and inside the heating device 2, and reducing the probability of bacteria growing inside the heating device 2; at the same time, since the liquid inlet end of the drain pipe 47 is connected to the cleaning pipe 44 and is located between the cleaning control valve 402 and the drive pump 41, the liquid outlet end of the drain pipe 47 is connected to the water supply pipe 43, it can effectively shorten the required length of the cleaning pipe 44 while realizing the drainage drive, further improve the integration of the pipelines in the heating device 2, reduce costs, and reduce floor space.

[0180] The controller is also used to execute the drainage step, which specifically includes: controlling the drainage control valve 409, the liquid outlet control valve 408 and the drive pump 41 to start, and controlling the liquid inlet control valve 404, the steam control valve 401, the water supply control valve 403, the cleaning agent control valve 405 and the cleaning control valve 402 to close, so that the liquid inside the heating device 2 is discharged to the water supply pipe 43 through the liquid outlet pipe 45, the cleaning pipe 44 and the drainage pipe 47 in turn.

[0181] When the heating device 2 heats the cleaning agent or heats cold water to form hot water, since the heating chamber 215 of the heating device 2 is a closed structure, the heating process will cause the air pressure inside the heating chamber 215 to increase. In order to avoid excessive air pressure inside the heating chamber 215, in one embodiment, the heating chamber 215 of the heating device 2 is connected to a first air pressure balance pipe 48, and the first air pressure balance pipe 48 is provided with an air outlet one-way valve 406. The air outlet one-way valve 406 only allows gas to flow out of the heating chamber 215 from the heating chamber 215 through the air outlet one-way valve 406, and the air outlet one-way valve 406 can be opened when the pressure in the heating chamber 215 is greater than the preset pressure.

[0182] According to the above arrangement, when the pressure in the heating chamber 215 increases to a preset pressure, the gas in the heating chamber 215 will flow out through the first air pressure balance pipe 48, avoiding the risk of explosion caused by excessive pressure in the heating chamber 215, thereby improving the reliability and safety of the cleaning device 100; at the same time, this arrangement can also avoid the increase of air pressure in the heating chamber 215 when supplying water to the heating chamber 215 of the heating device 2, which may cause the water flow to be unable to enter the interior of the heating chamber 215, thereby ensuring the smooth water inlet process of the heating chamber 215.

[0183] In one embodiment, the air inlet end of the first air pressure equalization pipe 48 is connected to the cleaning pipe 44 and is located upstream of the steam control valve 401; the air outlet end of the first air pressure equalization pipe 48 is connected to the water supply pipe 43 and is located upstream of the water supply control valve 403. This arrangement allows the first air pressure equalization pipe 48 to be connected between the cleaning pipe 44 and the water supply pipe 43, thereby shortening the length of the first air pressure equalization pipe 48, improving the structural integration of the cleaning device 100, and reducing the number of openings in the heating device 2. Furthermore, because the air outlet end of the first air pressure equalization pipe 48 is connected to the water supply pipe 43, when steam is generated in the heating chamber 215, the steam overflowing through the first air pressure equalization pipe 48 can be directly passed into the water supply pipe 43, preventing the high-temperature steam from escaping. The steam from the escaped area can also be used to heat the inner cavity of the water supply pipe 43, thereby facilitating the preheating of the cold water.

[0184] In another embodiment, the air inlet end of the first air pressure balance tube 48 may be directly connected to the heating chamber 215 , that is, the first air pressure balance tube 48 passes through the heating chamber 215 in a sealed manner.

[0185] Furthermore, the heating chamber 215 of the heating device 2 is also connected to a second air pressure balance pipe 49, and an air intake check valve 407 is provided on the second air pressure balance pipe 49. The air intake check valve 407 only allows external air to enter the heating chamber 215 through the second air pressure balance pipe 49.

[0186] When a fluid such as steam or hot water is supplied to the cleaning pipe 44, the fluid in the heating chamber 215 is pumped into the cleaning pipe 44 by the driving pump 41, causing the air pressure in the heating chamber 215 to decrease. When the air pressure decreases to a certain level, the fluid in the heating chamber 215 cannot flow out of the heating chamber 215, thereby affecting cleaning. However, by providing a second air pressure balancing pipe 49, when the pressure in the heating chamber 215 decreases to a certain level, external air can enter the heating chamber 215 through the second air pressure balancing pipe 49, thereby balancing the air pressure in the heating chamber 215 and ensuring that the fluid in the heating chamber 215 can be smoothly discharged into the cleaning pipe 44, ensuring a smooth cleaning process and improving the cleaning effect and reliability.

[0187] In one embodiment, a cleaning one-way valve 410 is also provided on the cleaning pipe 44. The cleaning one-way valve 410 is located downstream of the cleaning control valve 402, and the cleaning one-way valve 410 only allows the fluid to flow from the cleaning control valve 402 to the nozzle 1, thereby preventing gas or fluid from flowing back into the heating chamber 215 through the cleaning pipe 44, thereby improving the reliability of the cleaning device 100.

[0188] Example 3

[0189] This embodiment provides a cleaning structure, and the cleaning structure provided in this embodiment is a further improvement based on the cleaning structure in the second embodiment. This embodiment will not repeat the same structure as that in the second embodiment.

[0190] like Figures 6 to 8 As shown, in this embodiment, to further achieve the integrated configuration of the cleaning device 100, the cleaning device 100 further includes an installation box 3, comprising an open box body 31 at the upper end of the installation box 3 and a cover body 32 covering the open end of the box body 31. The box body 31 and the solid body together form an installation cavity 312. The pipe assembly 4 and the heating device 2 are both located within the installation cavity 312, and the water inlet end of the water supply pipe 43 and the liquid outlet end of the cleaning pipe 44 extend outside the installation box 3. The provision of the installation box 3 facilitates the modular configuration of the cleaning device 100, thereby facilitating the overall installation, disassembly, and transportation of the cleaning device, thereby improving the integration of the cleaning device 100.

[0191] In one embodiment, the box body 31 has a first mounting slot with an open top, and the cover body 32 has a second mounting slot with an open bottom. The box body 31 and the cover body 32 are fastened together, so that the first mounting slot and the second mounting slot jointly form a mounting cavity. This arrangement allows the upper ends of the pipe assembly 4 and the heating device 2 to extend upward from the box body 31 after the cover body 32 is removed from the box body 31, thereby facilitating disassembly, assembly, and maintenance of the pipe assembly 4 and the heating device 2. In other embodiments, the cover body 32 can be an entire plate-like structure, with the cover body 32 covering the upper opening of the box body 31, which closes the notch of the first mounting slot.

[0192] To better assemble the cover 32 and the box body 31, the box body 31 includes a main box portion 311 with an open top end, and a first flange portion 315 extending outward from the edge of the opening of the main box portion 311. The cover 32 includes a main cover portion 321 with an open bottom end, and a second flange portion 322 extending outward from the edge of the opening of the main cover 321. When the box body 31 and the cover 32 are fastened together, the first flange portion 315 and the second flange portion 322 are abutted. The box body 31 and the cover 32 are connected by fasteners extending through the first flange portion 315 and the second flange portion 322. Multiple fasteners are provided at intervals along the circumference of the box body 31 to ensure reliable assembly of the box body 31 and the cover 32. By arranging the fasteners outside the installation cavity, interference between the fasteners and the pipeline assembly 4 can be better avoided, thereby improving the assembly efficiency of the installation box 3.

[0193] In order to improve the installation convenience of the heating device 2 and the pipeline assembly 4 in the installation box 3, in one embodiment, the installation cavity includes a heating installation cavity 3121 and a pipeline installation cavity 3122 horizontally separated by a partition component 313. The heating device 2 is installed in the heating installation cavity 3121, and the pipeline assembly 4 is installed in the pipeline installation cavity 3122. This enables the heating device 2 and the pipeline assembly 4 to be installed in different areas, which is conducive to the installation positioning of the pipeline assembly 4 and the heating device 2, reduces the probability of mutual interference between the two, and improves the rationality of the layout and compactness of the heating device 2 and the pipeline assembly 4 in the installation cavity.

[0194] In one embodiment, the bottom of the heating installation cavity 3121 is provided with a wire threading port 3123, through which the connecting wires of the heating device 2 pass out of the installation box 3, facilitating wiring of the heating device 2. The wall of the pipe installation cavity 3122 is provided with multiple pipe through-holes 3124, through which the water supply pipe 43 and the cleaning pipe 44 pass out of the installation box 3.

[0195] Furthermore, a plurality of air holes 3125 are provided on the cavity wall of the pipeline installation cavity 3122, and the plurality of air holes 3125 connect the pipeline installation cavity 3122 and the external environment, so as to facilitate the air intake of the second air pressure balance pipe 49. At the same time, it is conducive to the heat dissipation of each valve structure in the pipeline assembly 4, thereby improving the operation safety and reliability of the pipeline assembly 4.

[0196] like Figures 8 to 12 As shown, in one embodiment, the heating device 2 includes a heating box 21, a heating unit 22, and a thermostat 23. The heating box 21 has an open heating chamber 215, with a heating port 2121 defined at the bottom of the chamber. A cover 32 seals and blocks the opening of the heating chamber 215. The heating unit 22 is sealed against and blocks the heating port 2121. The thermostat 23 is located on a side of the heating unit 22 away from the heating chamber 215 and is electrically connected to the heating unit 22. The thermostat 23 is used to control the heating power of the heating unit 22. Specifically, the heating box 21, the heating unit 22, and the cover 32 cooperate to seal the heating chamber 215.

[0197] The structural setting of this type of heating device 2 is conducive to simplifying the structure of the heating device 2, so that the heating device 2 does not need to be additionally configured with an upper cover or other structures, thereby improving the structural integration and compactness of the heating device 2, and further reducing the vertical height of the cleaning device 100; at the same time, by setting the temperature controller 23, it is conducive to temperature control of the start and stop of the heating unit 22 and the heating power, thereby improving the safety and reliability of the use of the heating device 2.

[0198] Furthermore, the heating unit 22 is a disc-shaped structure, the upper end of the heating unit 22 extends into the heating chamber 215, and a sealing ring 24 is provided between the heating device 2 and the bottom of the heating chamber 215 to seal the connection between the heating unit 22 and the bottom of the heating chamber 215.

[0199] In one embodiment, the sealing ring 24 is annular and includes a radial sealing portion, an axial sealing portion, and a positioning inner ring portion, which are sequentially connected from the outside to the inside. The radial sealing portion and the positioning inner ring portion are located above and below the axial sealing portion, respectively. The axial sealing portion is sandwiched between the bottom side of the heating plate and the bottom of the heating chamber 215, the radial sealing portion is sandwiched between the outer wall of the heating plate and the side wall of the heating chamber 215, and the positioning inner ring portion is inserted inside the heating port 2121. This ensures a sealed installation between the heating plate and the heating box 21.

[0200] In one embodiment, the heating box 21 includes a box body 211 with an open top and a boss portion 212 protruding from the bottom of the box body 211. The boss portion 212 has a smaller cross-sectional area than the box body 211, and the bottom of the boss portion 212 is provided with the aforementioned heating port 2121. The heating chamber 215 includes a lower chamber portion enclosed by the boss portion 212 and an upper chamber portion enclosed by the box body 211. The liquid inlet and outlet 2131 is provided on the sidewall of the boss portion 212. This arrangement ensures that liquid entering the heating chamber 215 through the liquid inlet and outlet 2131 enters the lower chamber portion. Because the cross-sectional area of ​​the lower chamber portion is smaller than that of the upper chamber portion, and the heating port 2121 is located at the bottom of the lower chamber portion, when the amount of liquid entering the heating chamber 215 is small, the liquid can be concentrated in the lower chamber portion for centralized heating by the heating unit 22, thereby improving the efficiency of the heating unit 22 in heating the liquid and reducing energy consumption.

[0201] To better facilitate installation of the heating device 2 in the heating installation cavity 3121, an annular positioning collar 314 is provided on the bottom of the heating installation cavity 3121. The positioning collar 314 surrounds the threading opening 3123, and the heating unit 22, the thermostat 23, and the boss 212 are all located inside the positioning collar 314. The bottom of the main box 311 abuts against the end face of the positioning collar 314. Thus, the abutment between the positioning collar 314 and the bottom of the main box 311 allows the heating box 21 to be positioned and limited in its vertical installation position. This also facilitates the spacing of the boss 212 relative to the bottom of the heating installation cavity 3121, thereby facilitating installation of the thermostat 23 in the heating installation cavity 3121 and reducing interference between the thermostat 23 and the bottom of the heating installation cavity 3121.

[0202] In one embodiment, a positioning ring portion 323 is protruded downward from the bottom of the second mounting groove, and the shape of the positioning ring portion 323 is adapted to the opening shape of the heating chamber 215. The positioning ring portion 323 is plugged into and matched with the upper end of the heating box 21, and the bottom of the second mounting groove is in contact with the upper opening of the mounting box 3. Therefore, the heating box 21 is completely limited in the vertical direction through the cooperation between the top of the box body 31 and the positioning protruding ring portion 314, preventing the heating device 2 from shaking in the vertical direction inside the heating mounting chamber 3121, and facilitating the closure of the upper opening of the heating chamber 215 by the cover body 32.

[0203] In one embodiment, the positioning ring 323 is located inside the heating box 21. In another embodiment, the positioning ring 323 may also be located outside the heating box 21. To further seal the upper open end of the heating chamber 215, a sealing structure may be provided between the positioning ring 323 and the upper end of the heating box 21 to seal the assembly gap between the positioning ring 323 and the heating box 21, thereby preventing steam from leaking through the gap.

[0204] In order to improve the connection of the liquid inlet pipe 42 at the steam inlet and outlet, in one embodiment, the heating device 2 also includes a connecting pipe 213, which is arranged at the steam inlet and outlet, and the connecting pipe 213 at least passes through the positioning protruding ring portion 314, and the liquid inlet pipe 42 is connected to the connecting pipe 213.

[0205] Furthermore, a steam pipe portion 214 extends outward from the box body 211 corresponding to the steam outlet 2111 , and the cleaning pipe 44 is connected to the steam pipe portion 214 .

[0206] Example 4

[0207] This embodiment provides an oil fume extraction device, comprising a fan 200 and a cleaning structure, wherein a nozzle 1 of the cleaning structure is disposed toward an impeller 201 of the fan 200, and a controller controls the cleaning device 100 to clean the impeller 201. The cleaning structure adopts the cleaning structure of the second embodiment or the third embodiment.

[0208] like Figure 13 and Figure 14 As shown, specifically, the oil fume extraction equipment includes a bellows 400, the bellows 400 has an air cavity, the fan 200 is installed in the air cavity, the controller and the heating device 2 are both installed on the outside of the bellows 400, and the nozzle 1 is installed on the volute 202 of the impeller 201 to ensure the reliability of the relative position of the nozzle 1 and the impeller 201.

[0209] The oil fume extraction equipment provided in this embodiment can clean the impeller 201 by adopting the above-mentioned cleaning structure, thereby improving the long-term performance of the oil fume extraction equipment and improving the safety and reliability of the use of the oil fume extraction equipment; at the same time, it can reduce the space occupied by the cleaning structure in the oil fume extraction equipment, improve the overall structural compactness of the oil fume extraction equipment, and reduce the use cost of the oil fume extraction equipment.

[0210] In one embodiment, the oil fume extraction device is a range hood, which includes a fume hood having a fume collection chamber, a bellows 400 mounted on the upper side of the fume hood, and a fume hood having a fume inlet communicating with the fume collection chamber. In another embodiment, the oil fume extraction device may also be an integrated stove.

[0211] To improve the installation convenience of heating device 2, in one embodiment, the oil fume extraction device includes an electrical control box 300, which includes an electrical control outer box 301 and a control assembly 302 disposed within electrical control outer box 301. Control assembly 302 includes a controller. Electrical control box 300 is mounted on the top exterior of bellows 400, and heating device 2 is mounted on top of electrical control box 300. This shortens the distance between heating device 2 and the controller, facilitating electrical connection between the electrical components within heating device 2 and the controller. This shortens the wires connecting the electrical components within heating device 2 and the controller, improving the overall compactness of the oil fume extraction device.

[0212] like Figures 15 to 17 As shown, in one embodiment, the nozzle 1 includes a nozzle portion 11 and a positioning portion 12 connected to one end of the nozzle portion 11. The volute 202 of the fan 200 has a mounting opening, into which the nozzle portion 11 is inserted. The side of the positioning portion 12 facing away from the impeller 201 is in contact with the inner surface of the volute 202, thereby achieving stable and reliable installation of the nozzle 1 on the volute 202. The extension direction of the nozzle portion 11 is arranged at an angle relative to the radial direction of the mounting opening, so that the fluid ejected from the nozzle can drive the impeller 201 to rotate.

[0213] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A method for cleaning oil fume extraction equipment, characterized in that: The cleaning method comprises: Determine a selection of a cleaning mode, wherein the cleaning mode includes an enhanced washing mode, a normal washing mode, and a quick washing mode; When the enhanced washing mode is selected, the steam washing step and the first rinsing step are performed in sequence; When the normal washing mode is selected, a first rinsing step is performed; When the quick wash mode is selected, performing a second rinse step; Wherein, the steam washing step comprises: Step S101, adding cold water to the heating device (2); Step S102, controlling the heating device (2) to operate, heating the cold water to form hot steam; Step S103, controlling the hot steam to spray toward the impeller (201) of the oil fume extraction device; After repeating steps S101 to S103 for a preset number of times, the steam washing step ends; The first flushing step comprises: Step S201, adding a cleaning agent to the heating device (2); Step S202, controlling the heating device (2) to operate and heat the cleaning agent; Step S203, controlling the heated cleaning agent to spray toward the impeller (201); Step S204, adding cold water to the heating device (2); Step S205, controlling the heating device (2) to operate and heat the cold water; Step S206, controlling the heated water to spray toward the impeller (201); The second washing step comprises: Step S301, adding cleaning agent and cold water to the heating device (2); Step S302, controlling the heating device (2) to operate and heating the mixture of the cleaning agent and the cold water; Step S303: Control the heated mixed liquid to spray toward the impeller (201).

2. The cleaning method according to claim 1, wherein The step S206 specifically includes: after completing the step S203 and after a preset time, controlling the heated water to be sprayed toward the impeller (201), and the sum of the execution time of the step S205 and the step S204 is shorter than the preset time.

3. The cleaning method according to claim 1, wherein The selection of the cleaning mode is determined by one of the following methods: detecting the oil contamination degree of the impeller (201), and determining the selection of a cleaning mode based on the oil contamination degree; Alternatively, obtaining a cleaning interval duration from the most recent cleaning, and determining a cleaning mode based on the cleaning interval duration; Alternatively, a user's selection operation input for a cleaning mode is obtained, and the selection of the cleaning mode is determined based on the selection operation input.

4. A cleaning structure, characterized in that: The cleaning device (100) comprises a controller and a cleaning device (100), wherein the cleaning device (100) comprises a nozzle (1), a heating device (2), a water supply pipe (43), a liquid inlet pipe (42), and a cleaning pipe (44); the nozzle (1) is connected to the steam outlet (2111) of the heating device (2) via the cleaning pipe (44); and the cleaning pipe (44) is provided with a steam control valve (401), a drive pump (41), and a cleaning control valve (402); The water outlet end of the water supply pipe (43) is connected to the cleaning pipe (44), the liquid inlet pipe (42) is connected between the liquid inlet and outlet (2131) of the heating device (2) and the cleaning pipe (44), and the steam control valve (401), the water outlet end of the water supply pipe (43), the driving pump (41), the water inlet end of the liquid inlet pipe (42) and the cleaning control valve (402) are sequentially arranged along the fluid flow direction of the cleaning pipe (44), the water supply control valve (403) is provided on the water supply pipe (43), and the liquid inlet control valve (404) is provided on the liquid inlet pipe (42); The steam control valve (401), the cleaning control valve (402), the water supply control valve (403), the liquid inlet control valve (404) and the driving pump (41) are all electrically connected to the controller; The controller is used to execute the cleaning method according to any one of claims 1 to 3, wherein the steam washing step is specifically: Step S101, controlling the steam control valve (401) and the cleaning control valve (402) to be closed, and controlling the water supply control valve (403), the liquid inlet control valve (404) and the driving pump (41) to be opened, so as to add cold water to the heating device (2); Step S102, controlling the water supply control valve (403) and the liquid inlet control valve (404) to close and the driving pump (41) to stop working, and controlling the heating device (2) to operate to heat the cold water to form hot steam; Step S103, controlling the steam control valve (401), the cleaning control valve (402) and the driving pump (41) to open, so as to control the hot steam to spray toward the impeller (201) of the oil fume extraction device; After repeating steps S101 to S103 for a preset number of times, the execution ends.

5. The cleaning structure according to claim 4, characterized in that: The cleaning device (100) further comprises a cleaning agent pipe (46) and a liquid outlet pipe (45), wherein the liquid outlet end of the cleaning agent pipe (46) is connected to the cleaning pipe (44) and is located between the steam control valve (401) and the driving pump (41), and the cleaning agent pipe (46) is provided with a cleaning agent control valve (405), the liquid inlet end of the liquid outlet pipe (45) is connected to the liquid inlet and outlet, the liquid outlet end of the liquid outlet pipe (45) is connected to the cleaning pipe (44) and is located between the driving pump (41) and the steam control valve (401), and the liquid outlet pipe (45) is provided with a liquid outlet control valve (408); The cleaning agent control valve (405) and the liquid outlet control valve (408) are both electrically connected to the controller, and the controller is also used to perform a first flushing step and a second flushing step. The first flushing step specifically includes: Step S201, controlling the cleaning agent control valve (405), the liquid inlet control valve (404) and the driving pump (41) to be open, and the cleaning control valve (402), the water supply control valve (403), the steam control valve (401) and the liquid outlet control valve (408) to be closed, so as to add cleaning agent to the heating device (2); Step S202, controlling the cleaning agent control valve (405), the liquid inlet control valve (404) and the driving pump (41) to be closed, and controlling the heating device (2) to operate to heat the cleaning agent; Step S203, controlling the heating device (2) to stop running, and controlling the liquid outlet control valve (408), the cleaning control valve (402) and the driving pump (41) to start, so as to spray the heated cleaning agent toward the impeller (201); Step S204, controlling the water supply control valve (403), the liquid inlet control valve (404) and the driving pump (41) to start, and controlling the liquid outlet control valve (408) and the cleaning control valve (402) to close, so as to add cold water into the interior of the heating device (2); Step S205: Control the water supply control valve (403), the liquid inlet control valve (404) and the driving pump (41) to be closed, and control the heating device (2) to operate to heat the cold water to form hot water; Step S206, controlling the heating device (2) to stop running, and controlling the liquid outlet control valve (408), the cleaning control valve (402) and the driving pump (41) to start, so as to spray the heated water toward the impeller (201); The second flushing step specifically includes: Step S301, controlling the water supply control valve (403), the cleaning agent control valve (405), the liquid inlet control valve (404) and the driving pump (41) to start, and controlling the steam control valve (401), the liquid outlet control valve (408) and the cleaning control valve (402) to close, so as to add cleaning agent and cold water into the heating device (2); Step S302, controlling the water supply control valve (403), the cleaning agent control valve (405), the liquid inlet control valve (404) and the driving pump (41) to be closed, and controlling the heating device (2) to operate to heat the mixed liquid of the cleaning agent and cold water; Step S303: Control the liquid outlet control valve (408), the cleaning control valve (402) and the driving pump (41) to open, so as to spray the heated mixed liquid toward the impeller (201).

6. The cleaning structure according to claim 5, characterized in that: The cleaning device (100) further comprises a liquid discharge pipe (47), wherein a liquid inlet end of the liquid discharge pipe (47) is connected to the cleaning pipe (44) and is located between the driving pump (41) and the cleaning control valve (402), and a liquid outlet end of the liquid discharge pipe (47) is connected to the water supply pipe (43) and is located upstream of the water supply control valve (403). A liquid discharge control valve (409) is provided on the liquid discharge pipe (47), and the liquid discharge control valve (409) is communicatively connected to the controller; The controller is also used to perform a liquid discharge step, which specifically includes: controlling the liquid discharge control valve (409), the liquid outlet control valve (408) and the driving pump (41) to start, and controlling the liquid inlet control valve (404), the steam control valve (401), the water supply control valve (403), the cleaning agent control valve (405) and the cleaning control valve (402) to close, so that the liquid inside the heating device (2) is discharged to the water supply pipe (43) through the liquid outlet pipe (45), the cleaning pipe (44) and the liquid discharge pipe (47) in sequence.

7. The cleaning structure according to any one of claims 4 to 6, characterized in that: The heating chamber (215) of the heating device (2) is connected to a first air pressure balance pipe (48) and a second air pressure balance pipe (49). The first air pressure balance pipe (48) is provided with an air outlet check valve (406), and the air outlet check valve (406) only allows the air in the heating chamber (215) to flow out to the outside. The second air pressure balance pipe (49) is provided with an air inlet check valve (407), and the air inlet check valve (407) only allows air to flow from the outside to the heating chamber (215).

8. The cleaning structure according to claim 7, characterized in that: The first end of the first air pressure balance pipe (48) is connected to the cleaning pipe (44) and is located upstream of the steam control valve (401); And / or, the second end of the first air pressure balance pipe (48) is connected to the water supply pipe (43) and is located upstream of the water supply control valve (403).

9. An oil fume extraction device, comprising a fan (200), characterized in that: It also comprises the cleaning structure according to any one of claims 4 to 8, wherein the nozzle (1) is arranged toward the impeller (201) of the fan (200), and the controller controls the cleaning device (100) to clean the impeller (201).

Images