CN114110693A - Range hood cleaning system and automatic cleaning method - Google Patents

Abstract

The invention discloses a cleaning system and a cleaning method for a range hood, which comprise a water box, a foam pump, a spray head, a water pipe, a volute, an impeller and a motor, wherein the water box is fixed on a shell of the range hood, the lower part of the water box is provided with an outlet connected with the water pipe, and the other end of the water pipe is connected with a water pump; the motor is arranged on the volute, and the impeller is fixed on a shaft at the upper part of the motor; the water pump is a gas-liquid double-inlet foam pump and is fixed on the volute through a foam pump fixing frame, the spray head is a section of hollow bent pipe, the spray head is aligned to the root part of the impeller blade, and the inner diameter of the spray head is 2-2.5 mm. The invention has the advantages of small volume, low failure rate and good cleaning effect.

Description

Range hood cleaning system and automatic cleaning method

Technical Field

The invention relates to the field of range hoods, in particular to a cleaning system with a self-cleaning function for a range hood.

Background

The range hood is a household appliance for exhausting oil smoke generated by cooking on a cooking bench, the cleaning function of the range hood gradually receives attention of users in recent years, and the range hood with various cleaning functions also gradually appears on the market. The mainstream technology in the current market is to wash the inside of the range hood by directly washing or heating, atomizing and the like by taking water as a medium; or heating the internal volute, the impeller and other parts to melt the oil stains and then flow down along the surface.

The cleaning structure using water as a medium generally has large usage amount, and oil stains are adsorbed on the surface and are difficult to wash clean because of strong adhesion force of the oil stains; the cleaning device is cleaned in a heating mode, a heating device needs to be installed, once a fault occurs, the heating device has a fire hazard, oil stains can still be adsorbed on the surface after being melted, and the oil stains are difficult to clean. The cleaning function is used, because the water consumption is large, the operation steps of a user are complicated, the oil cup needs to be disassembled and assembled, the collecting device needs to be replaced, cleaning liquid needs to be poured and the like, and actions except the use are added for the user.

In the prior art, a range hood which adopts foam to automatically clean is also available, the foam can prolong the contact time of the foam and a surface to be cleaned, and the contact tension of the foam and the surface to be cleaned is larger, so that the oil stain on the surface of the surface to be cleaned can be favorably soaked and decomposed and then removed. For example, chinese patent application No. CN 201711344668.8, application publication No. CN 109931639, application publication No. 2017.12.15, and application publication No. 2019.06.25, it relates to a range hood with self-cleaning function, which comprises a housing, a fan, a bubbling seat, a first liquid conduit, a second liquid conduit, a third liquid conduit, and a driving member, wherein the bubbling seat is hollow to form a mixing chamber, the first liquid conduit has a first port for water input, a second port of the first liquid conduit is communicated with the mixing chamber of the bubbling seat, the second liquid conduit has a first port for detergent input, a second port of the second liquid conduit is connected with the mixing chamber of the bubbling seat, a first port of the third liquid conduit is connected with an output port of the mixing chamber, and a second port of the third liquid conduit extends into the fan. The water flow is sprayed into the mixing cavity of the foam seat through the first liquid guide pipe and atomized to a certain extent to generate negative pressure in the mixing cavity, the detergent is sucked into the mixing cavity through the second liquid guide pipe and mixed with the water flow to form a cleaning medium with foam, the foam can prolong the contact time with the inner surface of the fan and play an emulsification role on oil stains, and the cleaning effect is further improved.

Although the automatic cleaning can be realized, the cleaning effect cannot meet the ideal requirement due to the fact that the cleaning medium is not adapted to the position and the angle in the fan and even the rotating speed of the fan impeller, and a space is still provided.

The above is only for the purpose of assisting understanding of the technical solution of the present invention, and does not represent an admission that all of the above is prior art.

Disclosure of Invention

Aiming at the problems in the prior art, the invention aims to provide a range hood cleaning system which is small in size, low in cost and good in cleaning effect.

The invention also aims to provide an automatic cleaning method of the range hood with the effect.

In order to achieve the purpose, the invention adopts the following technical scheme.

A cleaning system of a range hood comprises a water box, a foam pump, a spray head, a water pipe, a volute, an impeller and a motor, wherein the water box is fixed on a shell of the range hood, an outlet is formed in the lower part of the water box and is connected with the water pipe, and the other end of the water pipe is connected with a water pump; the motor is arranged on the volute, and the impeller is fixed on a shaft at the upper part of the motor; the water pump is a gas-liquid double-inlet foam pump and is fixed on the volute through a foam pump fixing frame, the spray head is a section of hollow bent pipe, the spray head is aligned to the root part of the impeller blade, and the inner diameter of the spray head is 2-2.5 mm.

As a further explanation of the scheme, the spray head is fixed on a metal plate part in the volute or the range hood by the spray head bracket, and the distance between the outlet of the spray head and the bottom of the impeller is 1-100 mm.

Furthermore, a reticular small hole structure is arranged at the water outlet end in the cavity of the foam pump, the diameter of the small hole is 0.7-0.9mm, the optimal diameter is 0.8mm, and the distance is 1.1 mm.

Further, the impeller axis is inclined at an angle of 30 ° ± 5 ° to the horizontal. Preferably 30 degrees, and the optimal rotating speed of the impeller is 60 +/-5 r/min by combining the angle and the small hole size of the spray head.

The invention also provides an automatic cleaning method adopting the cleaning system, which is characterized by comprising the following steps.

And S1, automatically starting the cleaning function after the range hood is closed after the user uses the range hood for 10-20 hours.

S2, after the cleaning function is started, the motor is electrified for 0.3S and is powered off for 5S to run for a period; at the moment, the motor drives the impeller to rotate, so that the impeller has an initial speed of about 60 r/min.

S3, the motor runs for 35S in a cycle of powering on for 0.2S and powering off for 5S, and the water pump runs for 35S at the same time; the foam pump sucks gas and liquid into the interior, converts the gas and the liquid into foam, flows out of the outlet in a foam state, flows along the pipeline and is sprayed out of the spray head; the motor rotates periodically at the moment, the average rotating speed is 60r/min, the impeller is driven to rotate at the same speed, and the impeller is uniformly sprayed on the root of the impeller blade.

S4, stopping the water pump, and periodically operating the motor for 80S by powering on for 0.2S and powering off for 5S; the foam condenses at the root of the impeller and starts to slide along the root of the blade under the action of centrifugal force and gravity, during which the blades of the entire impeller are cleaned, dissolving and adsorbing the oil stains in the foam.

S5, operating the motor at a high speed, namely, a stir-frying gear for 60S; at the moment, the residual liquid mixture is thrown out, and the residual cleaning agent can be used for cleaning the interior of the volute and finally flows into the oil cup along the inner wall of the inner wall.

And S6, automatically shutting down.

The invention has the beneficial effects.

The invention has simple structure and does not need excessive structural support function; water is not needed to be used as a main cleaning medium, and less solvent is needed for cleaning, and the using amount of the solvent is 30ml each time; the user experience is good, other parts do not need to be disassembled and assembled when the cleaning function is used every time, and only the cleaning agent needs to be added periodically; the volume is small, the installation position is not limited, and the failure rate is low.

The parameters adopted by the invention can enable the cleaning to achieve the best effect.

Drawings

The invention is further described below with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of a cleaning system according to an embodiment of the present invention.

Fig. 2 to 3 are schematic structural views of a foam pump according to an embodiment of the present invention.

Fig. 4-5 are schematic views of the reticulated pore structure of the foam pump.

Fig. 6-7 are views showing the impeller in a tilted state in a normal mounting state.

FIG. 8 is a state diagram of two blade sections being selected.

Wherein:

。

Detailed Description

The following further describes the embodiments of the present invention, so that the technical solutions and the advantages thereof of the present invention are more clear and definite. The following described embodiments are exemplary and are intended to be illustrative of the invention, but are not to be construed as limiting the invention.

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout.

Examples are given.

As shown in fig. 1, the cleaning system of the range hood of the present invention mainly comprises a foam pump 3, a spray head 6, a water box 1, a volute 7, an impeller 11, a motor 10, a water pipe 4 and other core components; the range hood shell 9 is a sheet metal part outside the range hood and comprises but is not limited to a front plate, a rear plate, a left side plate and a right side plate, and the volute 7 is obliquely fixed on the range hood shell 9; the motor 10 is arranged on the volute, the impeller 11 is fixed on a shaft at the upper part of the motor, and the impeller can rotate in the volute together with the motor under the drive of the motor; the water box 1 is fixed on the shell of the range hood and mainly has the function of containing cleaning agent for cleaning, the lower part of the water box is provided with an outlet which is connected with a water pipe 4, and the other end of the water pipe 4 is connected with a water pump 3; as shown in fig. 2 and 3, the water pump 3 is a gas-liquid double-inlet foam pump, and is fixed on the volute 7 through the foam pump fixing frame 2, and in the working state, the liquid inlet end 3.3 sucks in liquid, the gas inlet end 3.1 sucks in gas, the gas and the liquid are fully mixed in the pump, and pass through the internal mesh-shaped small hole 3.4 structure, as shown in fig. 4 and 5, the diameter of the small hole 3.4 is 0.8mm, and the distance is 1.1 mm; the pore diameter of the small pores 3.4 influences the quality of the foam, the larger the pore diameter of the small pores 3.4 is, the smaller the resistance of the mixed liquid is, and the larger the diameter of the foam is, so that the foam of the invention has the required smaller diameter, can increase the contact area with oil stains and can be fully dissolved. Because the surfactant in the detergent weakens the surface tension of water, when the detergent and the air pass through the small mesh holes 3.4, the detergent and the air form tiny foams and flow out of the outlet 3.2; the water flows into the spray head 6 through the water pipe 3, the spray head 6 is a section of hollow bent pipe and plays a role in guiding, the inner diameter is 2-2.5mm, the inner diameter of the spray head also influences the foam quality, the foam is transported through the guide pipe, part of the foam is broken and fused in the middle of the foam, the foam with the larger diameter is formed, the caliber from the guide pipe to the spray head is suddenly reduced, the larger foam is split into smaller foam or broken, the secondary guarantee that the foam output from the spray head has smaller diameter and higher density. The nozzle 6 is fixed on the volute 7 by the nozzle bracket 5, and foam is sprayed on the root C of the blade of the impeller 11 under the guiding action of the nozzle 6.

Fig. 6 and 7 show the impeller in the installed state, the axis and the horizontal plane are 30 degrees, fig. 8 shows the state of two blades on the selected impeller, and A, B shows two adjacent blades on the impeller. The shower nozzle is aimed at blade root C, when the foam is by the blowout, the point of falling is at the root C of blade, because the spiral case slope installation when the cigarette machine is inside, the foam has the trend of drippage downwards under the action of gravity, nevertheless under the centrifugal force effect that the impeller rotation brought, can not drippage, change and become to slide to the top D of blade slowly from blade root C, the partial foam of period breaks, fully contacts with the greasy dirt on the blade, dissolves, and is adsorbed by the foam that flows, accomplish until whole blade washs. Because the foam has viscosity, the foam fills the gap between the blade A and the blade B when being accumulated at the bottom of the blade, and the whole front and back surfaces of the blade are cleaned when sliding, so that the comprehensive cleaning is realized. After cleaning is completed, the cleaning solution flows into the oil cup 8. When the inclination angle is too small, the distance from the bottom of each blade to the top D is short, the action of gravity is weak, foams hardly slide, and the whole blade cannot be cleaned; when the inclination is too big, the action of gravity is too strong, and the rotational speed needs to be increased to ensure that the foam can not drip vertically, and the rotational speed is too fast, so that the melted cleaning solution can not fully dissolve the oil stain and can be thrown away from the impeller, and the cleaning effect is greatly reduced.

The range hood cleaning function of the control system comprises the following steps.

1. After the user uses the range hood for 10-20 hours, the cleaning function is automatically started after the range hood is closed.

2. After the cleaning function is started, the motor is powered on for 0.3s and powered off for 5s, and the motor runs for a period. At the moment, the motor drives the impeller to rotate, so that the impeller has an initial speed of about 60 r/min.

3. The motor runs for 35s in a period of powering on for 0.2s and powering off for 5s, and the water pump runs for 35s at the same time. The foam pump sucks gas and liquid into the interior, converts the gas and the liquid into foam, flows out of the outlet in a foam state, flows along the pipeline and is sprayed out of the spray head; the motor rotates periodically at the moment, the average rotating speed is 60r/min, the impeller is driven to rotate at the same speed, and the motor is uniformly sprayed on the root C of the impeller blade.

4. The water pump stops working, and the motor runs for 80s with the period of 0.2s power-off and 5s power-off. The foam condenses at the root C of the impeller and starts to slide along the root C of the blade under the action of centrifugal force and gravity, during which the blades of the entire impeller are cleaned, dissolving and adsorbing the oil stains in the foam.

5. The motor is run at high speed (stir fry) for 60 seconds. At the moment, the residual liquid mixture is thrown out, and the residual cleaning agent can be used for cleaning the interior of the volute and finally flows into the oil cup along the inner wall of the inner wall.

6. And automatically shutting down.

The control system of the invention solves the problem that the user needs to frequently operate the pain point when using the cleaning function from the user perspective, does not need to touch any key, does not need to replace or clean any structure, and does not need to wait for the operation of a program and the structure; from the aspect of structure, the control system has simpler component composition, no other redundant structure and smaller volume, and ensures low failure rate and installability; from the aspect of functions, the control system completes the processes of changing the form of the cleaning agent, uniformly covering the whole impeller, dissolving and removing oil stains and completely drying the impeller, ensures that the whole blade of the impeller can be fully contacted with the cleaning agent in the cleaning process, and can truly remove the oil stains on the impeller.

In the embodiment, the diameter of the small hole 3.4 can be 0.7-0.9mm, so that the fineness of foam can be ensured, the resistance borne by the mixed liquid cannot be too large, and the final outlet speed is ensured; the inclination angle of the impeller is 30 degrees, so that the foam can be ensured to completely clean the whole blade; the material of the spray head is stainless steel or plastic, so that the structure can be prevented from being corroded and deformed by the cleaning agent.

The nozzle is aligned to the root C of the blade, so that the blade can be cleaned from end to end; the rotating speed of the impeller is 60 +/-5 r/min, so that the cleaning solution can not drip and the foam can smoothly slide down; the used cleaning agent adopts alkalescence, and can effectively remove oil stains.

In addition, in the embodiment, the spray head can be fixed at a circle position on the periphery of the volute; the water pump fixing range is not limited to a volute, and the water pump fixing range can be fixed on a sheet metal part inside the range hood; the spray head bracket and the spray head can be made into an integrated structure (made into a part); the position of the water box is not limited, and the water box can be made into an embedded type; the length of the spray head is variable, and the distance between the spray head outlet and the bottom of the impeller is 1-100 mm.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above-described terms should not be understood to necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.

Although embodiments of the present invention have been shown and described, it will be understood that the above embodiments are exemplary and not to be construed as limiting the present invention, and that those skilled in the art may make changes, modifications, substitutions and alterations to the above embodiments within the scope of the present invention, the scope of which should be defined by the appended claims and their equivalents. The details not described in the detailed description are prior art or common general knowledge.

Claims (10)

1. A cleaning system of a range hood comprises a water box, a foam pump, a spray head, a water pipe, a volute, an impeller and a motor, wherein the water box is fixed on a shell of the range hood, an outlet is formed in the lower part of the water box and is connected with the water pipe, and the other end of the water pipe is connected with a water pump; the motor is arranged on the volute, and the impeller is fixed on a shaft at the upper part of the motor; the water pump is a gas-liquid double-inlet foam pump and is fixed on the volute through a foam pump fixing frame, the spray head is a section of hollow bent pipe, the spray head is aligned to the root part of the impeller blade, and the inner diameter of the spray head is 2-2.5 mm.

2. The range hood cleaning system of claim 1, wherein the spray head is fixed on the volute or the sheet metal part inside the range hood by the spray head bracket, and the distance between the outlet of the spray head and the bottom of the impeller is 1-100 mm.

3. The range hood cleaning system of claim 1, wherein the water outlet end in the cavity of the foam pump is provided with a mesh-shaped small hole structure, and the diameter of the small hole is 0.7-0.9 mm.

4. The range hood cleaning system of claim 3, wherein the apertures have a diameter of 0.8mm and a pitch of 1.1 mm.

5. The extractor hood cleaning system of claim 1, wherein the impeller axis is inclined at an angle of 30 ° ± 5 ° to the horizontal.

6. The range hood cleaning system of claim 5, wherein the angle of inclination is 30 °.

7. The extractor hood cleaning system of claim 5, wherein the impeller speed is 60 r/min.

8. The range hood cleaning system according to claim 1, wherein the material of the spray head is stainless steel or plastic, and the cleaning agent used in the water box is a weak alkaline cleaning agent.

9. The range hood cleaning system of claim 2, wherein the spray head bracket and the spray head are of an integrated structure, and the water box is installed in an embedded manner.

10. An automatic cleaning method using the cleaning system according to any one of claims 1 to 9, characterized by comprising the steps of:

s1, automatically starting a cleaning function after the range hood is closed after a user uses the range hood for 10-20 hours;

s2, after the cleaning function is started, the motor is electrified for 0.3S and is powered off for 5S to run for a period; at the moment, the motor drives the impeller to rotate, so that the impeller has an initial speed of about 60 r/min;

s3, the motor runs for 35S in a cycle of powering on for 0.2S and powering off for 5S, and the water pump runs for 35S at the same time; the foam pump sucks gas and liquid into the interior, converts the gas and the liquid into foam, flows out of the outlet in a foam state, flows along the pipeline and is sprayed out of the spray head; the motor rotates periodically at the moment, the average rotating speed is 60r/min, the impeller is driven to rotate at the same speed, and the impeller is uniformly sprayed on the root of the impeller blade;

s4, stopping the water pump, and periodically operating the motor for 80S by powering on for 0.2S and powering off for 5S; the foam is condensed at the root part of the impeller and starts to slide along the root part of the blade under the action of centrifugal force and gravity, and the blade of the whole impeller is cleaned in the period, so that the oil stain is dissolved and absorbed in the foam;

s5, operating the motor at a high speed, namely, a stir-frying gear for 60S; then, the residual liquid mixture is thrown out, the residual cleaning agent can clean the interior of the volute and finally flows into the oil cup along the inner wall of the inner wall;

and S6, automatically shutting down.

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