CN220215982U - Steam cleaning system and range hood - Google Patents

Abstract

The application relates to the technical field of kitchen appliances, in particular to a steam cleaning system and a range hood. The steam cleaning system comprises a water tank, a heater and a spray head. The heater is communicated with the water tank and is used for heating water. The water tank is provided with a highest liquid level line, and the position height of the highest liquid level line is more than or equal to the position height of the heater. The spray head is communicated with the heater. The one-way valve is arranged between the water tank and the heater and is used for preventing water in the heater from flowing back into the water tank. The heater is arranged at a position lower than the highest liquid level line of the water tank, so that water in the water tank can automatically flow into the heater under the action of gravity, water can be stably supplied to the heater, noise in the use process of the system can be reduced, and user experience is improved; meanwhile, the failure rate of the steam cleaning system can be reduced, and the maintenance cost is reduced.

Description

Steam cleaning system and range hood

Technical Field

The application relates to the technical field of kitchen appliances, in particular to a steam cleaning system and a range hood.

Background

The range hood can collect and discharge the oil smoke generated in the cooking process to the outside rapidly, and purify the air environment of the kitchen. The range hood is often attached with a large amount of viscous oil on the inside spare part after using a period, influences the operation of range hood, and the noise increases when using. The manual work washs the inside of range hood and need dismantle range hood structure, washs the degree of difficulty and waste time and energy.

The existing range hood automatically cleans the interior by spraying steam, the steam of the range hood is usually absorbed by a water pump, the water is heated and vaporized into steam after entering a heating body, and then the steam is sprayed onto impeller blades from a spray head, so that the self-cleaning function of the range hood is realized. The water pump is overlarge in starting noise, the user experience is poor, the water pump is a loss part, the failure rate is high, and the overall material and maintenance cost are also high. In addition, the water supply amount has fluctuation by means of water supply of the water pump, thereby affecting the steam function.

Disclosure of Invention

The application provides a steam cleaning system and range hood for solve among the prior art steam cleaning system noise big, the fault rate is high, the maintenance cost is high, steam clear water device passive water supply leads to the undulant defect of big of supply volume, realize reducing steam cleaning system noise, reduce steam cleaning system's fault rate in order to reduce maintenance cost, stable water yield in order to improve the cleaning performance.

The present application provides a steam cleaning system, comprising:

a water tank;

the heater is used for heating water in the heating cavity, and the highest liquid level line of the water tank is higher than the heating cavity;

and the spray head is communicated with the heater.

According to the steam cleaning system provided by the application, the steam cleaning system further comprises a one-way valve, wherein the one-way valve is arranged between the water tank and the heater and is used for preventing fluid in the heater from flowing back into the water tank.

According to the steam cleaning system provided by the application, the position height of the spray head is larger than the position height of the highest liquid level line.

According to the steam cleaning system provided by the application, the lowest liquid level line of the water tank is higher than the heating cavity.

According to the steam cleaning system provided by the application, the spray head is communicated with the heater through a hose;

alternatively, the water tank is connected with the heater through a hose.

The application also provides a range hood, including:

a first housing;

the second shell is connected with the first shell and is positioned at the bottom of the first shell;

the impeller is rotatably arranged in the first shell;

the steam cleaning system is the steam cleaning system, and at least a spray head of the steam cleaning system is arranged in the first shell.

According to the range hood provided by the application, the heater is arranged in the second shell, the spray head is arranged in the first shell, and the heater is suitable for spraying cleaning fluid towards the impeller; the water tank is arranged on the first shell or the second shell, and the vertical distance between the water tank and the bottom of the second shell is larger than the vertical distance between the heater and the bottom of the second shell.

According to the range hood provided by the application, the water tank is arranged at the top of the second shell.

According to the range hood that this application provided, still include the fixing base, the fixing base install in the second casing, the one end of fixing base with water tank detachably connects and communicates, the other end of fixing base with the heater is connected and communicates.

According to the range hood provided by the application, the water tank is arranged on the inner side of the first shell;

the first shell is provided with a front plate, a water receiving port is arranged on the front plate, and a water inlet of the water tank is communicated with the water receiving port through a communicating pipe.

According to the range hood provided by the application, the water tank is arranged on the outer side of the first shell, the water tank is provided with the pipe joint, the pipe joint is communicated with the heater through the connecting pipe, the one-way valve is arranged between the water tank and the heater, and the one-way valve is arranged in the pipe joint.

According to the steam cleaning system disclosed by the embodiment of the application, the heater is arranged at the position lower than the highest liquid level line of the water tank, so that water in the water tank can automatically flow into the heater under the action of gravity, water can be stably supplied to the heater, noise in the using process of the system can be reduced, and user experience is improved; meanwhile, the failure rate of the steam cleaning system can be reduced, and the maintenance cost is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the related art, the drawings that are required to be used in the embodiments or the related technical descriptions will be briefly described, and it is apparent that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the drawings without inventive effort for those skilled in the art.

FIG. 1 is a schematic view of a steam cleaning system according to an embodiment of the present application;

fig. 2 is one of schematic structural views of a range hood according to an embodiment of the present application, in which a water tank is not shown;

fig. 3 is a perspective view of a bottom view of the range hood provided in an embodiment of the present application, wherein one side plate of the second housing is not shown;

FIG. 4 is an enlarged view I of a portion of FIG. 3;

fig. 5 is one of schematic cross-sectional views of a range hood provided in an embodiment of the present application;

fig. 6 is a perspective view of a top view of a range hood provided in an embodiment of the present application;

fig. 7 is a second schematic cross-sectional view of a range hood according to an embodiment of the present disclosure;

FIG. 8 is an enlarged partial view II of FIG. 7;

fig. 9 is a schematic structural view of a water tank provided in an embodiment of the present application;

fig. 10 is one of the heating state change diagrams of the heater provided in the embodiment of the present application;

FIG. 11 is a second diagram of a change in heating state of a heater according to an embodiment of the present disclosure;

fig. 12 is a third view showing a change in the heating state of the heater according to the embodiment of the present application.

Reference numerals:

100. a range hood;

110. a first housing; 1101. a front plate; 1102. a back plate; 111. an impeller; 112. a second housing;

120. a water tank; 1201. a connection part; 121. a heater; 122. a spray head; 123. a one-way valve; 124. a water receiving port; 125. an end cap; 126. a pipe joint;

130. a fixing seat.

Detailed Description

Embodiments of the present utility model are described in further detail below with reference to the accompanying drawings and examples. The following examples are illustrative of the utility model but are not intended to limit the scope of the utility model.

In the description of the embodiments of the present utility model, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the embodiments of the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the embodiments of the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In describing embodiments of the present utility model, it should be noted that, unless explicitly stated and limited otherwise, the terms "coupled," "coupled," and "connected" should be construed broadly, and may be either a fixed connection, a removable connection, or an integral connection, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in embodiments of the present utility model will be understood in detail by those of ordinary skill in the art.

In embodiments of the utility model, unless expressly specified and limited otherwise, a first feature "up" or "down" on a second feature may be that the first and second features are in direct contact, or that the first and second features are in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means 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 embodiments of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed 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, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

The steam cleaning system and range hood of the present application are described below with reference to fig. 1-12. It can be understood that the range hood can collect and discharge the oil smoke generated in the cooking process to the outside rapidly, and purify the kitchen air environment. After the range hood is used for a period of time, a large amount of viscous oil is often attached to parts inside the range hood, so that the operation of the range hood is affected, the power consumption is increased, and the noise is increased during use. The manual work washs the inside of range hood and need dismantle range hood structure, washs the degree of difficulty and waste time and energy. In the related art, the range hood automatically cleans the interior of the range hood in a steam spraying mode, water is usually supplied to the range hood by a water pump, and the water is heated and vaporized into steam after entering a heating body and then sprayed onto impeller blades from a spray head, so that the self-cleaning function of the range hood is realized. However, this cleaning device has problems of large noise and unstable water quantity.

In view of the above problems, as described with reference to fig. 1, the steam cleaning system according to the embodiment of the present application includes a water tank 120, a heater 121, and a shower head 122.

Specifically, the water tank 120 is used to store a cleaning fluid, such as clear water. The heater 121 is in communication with the water tank 120, the heater 121 is for heating water, and the shower head 122 is in communication with the heater 121. The water tank 120 may supply water to the heater 121, the water is heated in the heater 121 and converted into steam at a certain pressure, the steam is sprayed from the spray head 122, and the air outlet of the spray head 122 faces the surface to be cleaned, so that the steam contacts the surface to be cleaned for cleaning.

The water tank 120 and the heater 121, and the heater 121 and the nozzle 122 may be directly connected, or may be indirectly connected through an intermediate structure. For example, the shower head 122 and the heater 121 may communicate through a hose, so that flexibility in installation of the shower head 122 may be improved; the water tank 120 may be directly connected to the heater 121. In some embodiments, an on-off valve may be provided between the spray head 122 and the heater 121 to prevent water in the heating chamber from escaping from the spray head 122 in the non-operating state.

The steam has the effects of soaking and softening stains on the surface to be cleaned, the steam is condensed on the surface to be cleaned, and when the condensed water on the surface to be cleaned is accumulated to a certain amount, the condensed water is converged into a jet and flows relative to the surface to be cleaned, so that the greasy dirt on the surface to be cleaned is removed. When the cleaning object of the steam cleaning system is a movable part, the cleaning object can rotate or swing in the cleaning process so as to throw out stains and sewage, and the cleaning effect is improved.

The water tank 120 is provided with a highest liquid level line, a heating cavity is formed inside the heater 121, the heating cavity is communicated with the water tank 120, and the heater 121 is used for heating water in the heating cavity and generating steam. The height of the highest liquid level line is higher than that of the heating cavity, as shown in fig. 1, the vertical distance between the highest liquid level line and the heater 121 is h1, and h1 is equal to or greater than 0. Thus, when the liquid level in the water tank 120 is at the highest level line, the liquid in the water tank 120 can automatically flow to the heating chamber, thereby realizing automatic water supply.

The sidewall of the water tank 120 may be made of a transparent material, or a communicating vessel may be provided on the sidewall of the water tank 120 to facilitate the external observation of the liquid level in the water tank 120. The highest level line may be provided on the outer side surface of the sidewall of the water tank 120, and the highest level line may be provided on the communicating vessel. The water tank 120 is provided with a water outlet, the heater 121 is provided with a water supply port, the water outlet and the water supply port can be connected through a hose, and water in the water tank 120 flows out of the water tank 120 through the water outlet and flows into the heater 121 from the water inlet. It will be appreciated that the height of the water outlet is lower than the height of the highest level line so that water in the water tank 120 can automatically flow out of the water tank 120 under the action of gravity.

Thus, as long as the liquid level in the water tank 120 is at the highest liquid level line, water in the water tank 120 can automatically flow to the heater 121 under the action of pressure, noise generated by water supply to the heater 121 by using a water pump is avoided, and the steam cleaning system has low failure rate and low maintenance cost. A throttle valve may be further provided between the water tank 120 and the heater 121 to adjust the flow rate of water flowing to the heater 121 to accommodate the heating power of the heater 121. In some embodiments, the lowest level line of the water tank 120 is at a height higher than the height of the heating chamber, so that water can be automatically supplied to the heating chamber when the liquid level in the water tank 120 is lower than the highest level line, thereby improving the utilization rate of water in the water tank 120.

According to the steam cleaning system of the embodiment of the application, the heater 121 is arranged at the position lower than the highest liquid level line of the water tank 120, so that water in the water tank 120 can automatically flow into the heater 121 under the action of gravity, water can be stably supplied to the heater 121, noise in the using process of the system can be reduced, and user experience is improved; meanwhile, the failure rate of the steam cleaning system can be reduced, and the maintenance cost is reduced.

In some embodiments, the steam cleaning system further includes a check valve 123, the check valve 123 being disposed between the water tank 120 and the heater 121, the check valve 123 being configured to prevent fluid within the heater 121 from flowing into the water tank 120. The heater heats and makes the pressure in the heating chamber rise, under the effect of pressure, hot water or steam in the heater can flow back into the water tank through the connecting channel between water tank and the heater in, damages the water tank like this easily, causes the safety problem. By arranging the one-way valve 123 between the water tank 120 and the heater 121, water and steam can only flow from the water tank 120 to the heater 121, so that the water tank 120 is prevented from being damaged due to the fact that water or steam with higher temperature flows into the water tank 120 reversely; at the same time, the pressure in the heater 121 is prevented from decreasing, so that the pressure of the steam sprayed from the spray head 122 is increased, thereby facilitating cleaning of stains on the surface to be cleaned and improving the cleaning effect of the steam.

According to some embodiments of the present application, the positional height of the spray head 122 is greater than the positional height of the highest level line. The spray head 122 is mounted at a position above the maximum level line so that water overflow from the spray head 122 due to the spray head 122 being below the water level in the tank 120 is avoided. Referring to FIG. 1, the vertical distance between the showerhead 122 and the highest level line is h2, h2 > 0.

Referring to fig. 2, the range hood 100 according to the embodiment of the present application includes a first housing 110, a second housing 112, an impeller 111, and a steam cleaning system.

Specifically, the second housing 112 is connected to the first housing 110 and is located at the bottom of the first housing 110. The impeller 111 is rotatably provided in the first housing 110, and draws the oil smoke into the first housing 110 and the second housing 112 by driving the impeller 111 to rotate, and discharges the oil smoke into the room by the power provided by the impeller 111. In some embodiments, the interiors of the first and second housings 110 and 112 are each provided with a flow passage for gas flow, and the first and second housings 110 and 112 are in communication, and the second housing 112 is located at the bottom of the first housing 110, and oil smoke may enter the first housing 110 from the second housing 112 and be discharged from the first housing 110 through the impeller 111.

Referring to fig. 2 and 3, the first housing 110 and the first housing 110 are both in a cube shape, the cross-sectional area of the second housing 112 is larger than that of the first housing 110, and the middle portion of the bottom plate of the second housing 112 protrudes toward the first housing 110, so that the bottom of the second housing 112 forms a groove. The first housing 110 is connected with the bottom plate of the second housing 112, and the inside of the first housing 110 is communicated with the bottom groove of the second housing 112, and the oil smoke enters the first housing 110 through the groove at the bottom of the second housing 112 and is discharged outdoors.

The steam cleaning system is a steam cleaning system as described above, at least the shower head 122 of the steam cleaning system is provided in the first housing 110, for example, the shower head 122 of the steam cleaning system may be provided in the first housing 110. The steam washing system may wash the inner wall of the first housing 110, the inner wall of the second housing 112, or the impeller 111. It will be appreciated that during the cooking of the range hood 100, the cooking fumes contact the impeller 111 and the oil droplets in the cooking fumes adhere to the impeller 111. After long-term use, the oil stains attached to the surface of the impeller 111 cause the impeller 111 to become heavy, which on one hand causes the power consumption of the range hood 100 to increase; on the other hand, the vibration during the rotation of the impeller 111 is reinforced, the service life of the impeller 111 is affected, and noise is generated.

The heater 121 is supplied with water through the water tank 120, and the heater 121 heats the water and generates steam. The spray head 122 of the steam cleaning system is arranged in the first shell 110 or the second shell 112 to spray steam to the surface to be cleaned for cleaning, so that automatic cleaning is realized, labor is saved, and cleaning efficiency is improved. Wherein, the highest liquid level line position on the water tank 120 is higher than the position of the heater 121, and the water in the water tank 120 is automatically supplied to the heater 121 under the action of gravity, thereby ensuring the stability of the water quantity in the heater 121, reducing the use of power components and reducing the noise in the working process of the steam cleaning system.

According to the range hood 100 disclosed by the embodiment of the application, the range hood 100 is automatically cleaned by the steam cleaning system, so that the manpower is saved, and the cleaning efficiency is improved. In the steam cleaning system, the height of the position of the heater 121 is lower than the height of the position of the highest liquid level line of the water tank 120, water in the water tank 120 is automatically supplied into the heater 121 under the action of gravity, the water in the heater 121 is ensured to be stable, the use of power components is reduced by the water supply mode, and the noise of the steam cleaning system in the working process is reduced.

According to some embodiments of the present application, the heater 121 is provided in the second housing 112, i.e., the heater 121 is positioned at a low position on the range hood 100, so that the settable space of the water tank 120 and the shower head 122 can be increased. The nozzle 122 is disposed in the first housing 110 and is adapted to spray a cleaning fluid toward the impeller 111 to clean the impeller 111. It will be appreciated that the cleaning fluid may comprise hot water and steam which atomizes after heating. As shown in fig. 2, wherein the top plate of the second housing 112 is not shown, one side plate of the first housing 110 is not shown. The heater 121 is embedded in the second housing 112 and is located on a sidewall of the second housing 112. In some embodiments, the heater 121 may also be provided at the bottom of the second housing 112. The spray head 122 is positioned in the first housing 110 with the outlet of the spray head 122 facing the impeller 111, and the spray head 122 may be mounted on a sidewall of the first housing 110. The nozzle 122 is connected to the heater 121 via a hose, and steam generated in the heater 121 is supplied into the nozzle 122 via the hose and is discharged from the nozzle 122.

The water tank 120 is disposed on the first housing 110, and the water tank 120 is detachably disposed on the first housing 110, or the water tank 120 and the first housing 110 are integrally formed. The vertical distance between the water tank 120 and the bottom of the second housing 112 is greater than the vertical distance between the heater 121 and the bottom of the second housing 112, so that water in the water tank 120 automatically flows to the heater 121 under the action of gravity, and the water replenishing amount of the heater 121 is kept stable. In some embodiments, the water tank 120 may also be disposed on the second housing 112.

Referring to fig. 3, a water tank 120 is provided on top of the second housing 112, according to some embodiments of the present application, which facilitates the routing of pipes. The water tank 120 and the heater 121 may be disposed adjacent to each other, as shown in fig. 3 and 4, and both the water tank 120 and the heater 121 are located on one side wall of the second housing 112, wherein the side wall is hidden for convenience in displaying the connection structure of the heater 121 and the water tank 120. The water tank 120 and the heater 121 are connected by a pipe, which is arranged in the second housing 112.

As shown in fig. 3, in some embodiments, the range hood 100 further includes a fixing base 130, and the fixing base 130 is mounted on the second housing 112. Specifically, the fixing base 130 may be fixedly connected to the top plate of the second housing 112. One end of the fixing base 130 is detachably connected and communicated with the water tank 120, for example, the water tank 120 may be inserted on the fixing base 130, or the water tank 120 may be connected on the fixing base 130 through a screw structure; the other end of the fixing base 130 is connected and communicated with the heater 121. In the example of fig. 4, one end of the fixing base 130 is directly connected to the bottom of the water tank 120, and the other end of the fixing base 130 is connected to the heater 121 through a pipe. Thus, the water tank 120 is convenient to disassemble, the water tank 120 can be a plug-in type water cup, the structure of connecting a tap water pipe is avoided, the applicability of the steam cleaning system is improved, and the structure of the range hood 100 is simplified.

Referring to fig. 5, according to some embodiments of the present application, a water tank 120 is provided within the first housing 110. In the example of fig. 5, the end of the impeller 111 faces the inner sidewall of the first housing 110, and the oil smoke enters the impeller 111 from the end of the impeller 111, and the water tank 120 is fixedly connected to the inner sidewall of the first housing 110 and located below the impeller 111 (in the direction shown in fig. 5) to avoid the water tank 120 blocking the flow of the oil smoke.

Referring to fig. 5, according to some embodiments of the present application, the first housing 110 has a front plate 1101 and a rear plate 1102 opposite to the front plate 1101, and it is understood that after the range hood 100 is installed in a kitchen or a specific space, a space for a user to operate is provided on a side of the front plate 1101. One end of the impeller 111 faces the front plate 1101, the other end of the impeller 111 faces the back plate 1102, the front plate 1101 is provided with a water receiving port 124, and the water inlet of the water tank 120 is communicated with the water receiving port 124 through a communicating pipe, so that a user can conveniently add water to the water tank 120. In some embodiments, the water tank 120 may be disposed below the backplate 1102 (in the orientation shown in fig. 5) and below the impeller 111 to avoid the water tank 120 from affecting the impeller 111 to draw oil fumes. The water receiving port 124 may be provided at an upper side (in the direction shown in fig. 5) of the water inlet of the water tank 120. The water receiving port 124 may be in communication with a municipal water supply through which the tank 120 is replenished with water. This facilitates replenishing the water tank 120 and an electromagnetic valve may be provided between the water tank 120 and the municipal water supply system to automatically replenish water to the water tank 120 according to the amount of water in the water tank 120 during the cleaning process, improving the degree of automation of the steam cleaning system.

As shown in fig. 6, in some embodiments, an end of the water receiving port 124 outside the first housing 110 may be provided with an end cap 125, the end cap 125 being movable relative to the water receiving port 124, the end cap 125 being configured to cover the water receiving port 124 and function as a device. The user can fill water into the water tank 120 from the water receiving port 124 through a hose or a vial.

Referring to fig. 7 and 8, according to some embodiments of the present application, a water tank 120 is provided at an outer side of the first housing 110. In the example of fig. 7, the water tank 120 is provided on one side wall of the first housing 110, and the water tank 120 is detachably connected to the first housing 110, or the water tank 120 is integrally formed with the first housing 110. In some embodiments, the water tank 120 is detachably disposed on the first housing 110. As shown in fig. 9, the water tank 120 is provided with a plurality of connection parts 1201 provided at intervals, and the connection parts 1201 are detachably connected to the first housing 110. The connecting portion 1201 may be a cylinder, and a blind hole is formed in the first housing 110, and the cylinder may be embedded in the blind hole to fix the water tank 120; alternatively, the connection portion 1201 may be a sliding block, and the first housing 110 is provided with a sliding groove adapted to the sliding block, and the sliding block is cooperatively connected with the sliding groove to fix the water tank 120.

Referring to fig. 7 and 8, according to some embodiments of the present application, a pipe joint 126 is provided on the water tank 120, and the pipe joint 126 communicates with the heater 121 through a connection pipe. As shown in fig. 8, a pipe joint 126 is provided on a side wall of the water tank 120 connected to the first housing 110, and one end of the pipe joint 126 is extended to a bottom wall of the inside of the water tank 120 and spaced apart from an inner bottom wall of the water tank 120. It will be appreciated that when the water level in the tank 120 is below the position of the pipe joint 126, steam formed by the heater 121 is ejected through the nozzle 122, the pressure in the heater 121 is reduced, the tank 120 and the heater 121 form a pressure difference, and water in the tank 120 is sucked into the heater 121. In some embodiments, the one-way valve 123 may be disposed within the tube fitting 126.

The steam cleaning method according to the embodiment of the present application is applied to the range hood 100 as described above, and the steam cleaning method includes:

s10: supplying water to the heater 121;

s20: the heater 121 heats water and generates steam to spray the steam to the impeller 111.

In step S10, water in the water tank 120 is automatically supplied to the heater 121 by gravity so that the amount of water in the heater 121 is kept stable. In some embodiments, a throttle valve is provided between the heater 121 and the water tank 120, and the amount of water supplied from the water tank 120 to the heater 121 may be controlled by adjusting the opening degree of the throttle valve, or the water tank 120 may be controlled to start supplying water to the heater 121.

In step S20, the heater 121 heats the water in the heating chamber and generates steam, and the heater 121 may be heated according to a certain rule by the heating power and the heating time of the heater 121 to obtain a desired cleaning effect. The steam generated in the heater 121 is ejected from the nozzle 122 under pressure.

In some embodiments, a plurality of spray heads 122 may be provided, which are spaced apart along the circumference of the impeller 111 to spray steam from a plurality of directions to clean the surface to be cleaned; or, the steam is sprayed from the spray head 122 to the impeller 111, and in the process of spraying the steam by the spray head 122, the impeller 111 keeps rotating, so that the steam is uniformly sprayed on the impeller 111, and oil stains and sewage on the impeller 111 are thrown out by centrifugal force generated by rotation of the impeller 111, so that the cleaning effect is improved; in addition, the number of the nozzles 122 can be reduced, and the structure of the range hood 100 can be simplified.

According to the steam cleaning method, water is supplied to the heater 121 through the water tank 120, the heater 121 heats the water in the heating cavity to generate steam, and the spray head 122 sprays the steam to the surface to be cleaned, so that automatic cleaning of the interior of the range hood 100 is realized, cleaning steps are simplified, cleaning efficiency is improved, and manpower is saved.

As described with reference to fig. 10, according to some embodiments of the present application, in the step of heating water and generating steam by the heater 121 to spray steam to the impeller 111, that is, in the step S20, the heater 121 is always maintained in a heated state. In fig. 10 to 12, each of graphs showing a change in the state of the heater 121 with time, the ordinate "off" showing that the heater 121 is in a stopped heating state, and "on" showing that the heater 121 is in a heating state, wherein the heating power of the heater 121 is not limited. In the example of fig. 10, the state curve of the heater 121 is a horizontal straight line, that is, the heater 121 is always kept in a heated state during the cleaning process. In this way, the steam can reach a higher temperature in the continuous heating process, which is beneficial to softening the greasy dirt on the surface of the impeller 111 and improving the cleaning effect.

Referring to fig. 11, according to some embodiments of the present application, in the step of heating water and generating steam by the heater 121 to spray the steam to the impeller 111, the heater 121 is intermittently heated. In this way, overheating of the water in the heater 121 can be avoided, so that the cleaning liquid ejected from the ejection head 122 contains steam and liquid water. The greasy dirt on the surface of the impeller 111 is softened by the steam, and the surface of the impeller 111 is flushed by the liquid water, so that the cleaning effect is improved. For example, the heater 121 stops heating after heating for a period of time, and maintains a heating stop state until the predetermined period ends, wherein the length of time for single heating of the heater 121 and the length of time for single heating stop may be the same or different.

Referring to fig. 11, according to some embodiments of the present application, the heater 121 stops heating after continuously heating for a period of time, and then stops heating after continuing to heat for a period of time. The single heating duration of the heater 121 is A, and the single heating stopping duration of the heater 121 is B, wherein A is more than or equal to B. In this way, it is possible to ensure that the steam generated by the heater 121 reaches a sufficient pressure to be ejected from the ejection head 122, and that the steam is continuously supplied for a period of time in which the heater 121 stops heating.

According to some embodiments of the present application, in the step of heating the water and generating steam by the heater 121 to spray the steam to the impeller 111, that is, in the step S20, the heater 121 is continuously heated first and then intermittently heated. As shown in fig. 12, the heater 121 is continuously heated for a period of time first, and thereafter, the heater 121 is alternately changed between a heating-stopped state and a heating state. It is to be understood that the number of times the heater 121 is adjusted to the heating state and the number of times the heater is adjusted to the heating-stopped state in the intermittent heating period may be set according to actual demands; and, the continuous heating may be performed again after the intermittent heating for a while, and then the intermittent heating may be performed, that is, the above-mentioned heating step may be performed cyclically.

Referring to FIG. 12, according to some embodiments of the present application, the duration of continuous heating of heater 121 is T, the duration of single heating of heater 121 is A, and the duration of single stopping heating of heater 121 is B, where A.gtoreq.B, A < T, during the intermittent heating phase. In this way, the heater 121 is continuously heated to generate high temperature steam (herein and hereinafter referred to as "high temperature" is a temperature of steam generated during a predetermined period, and in contrast, steam generated during the intermittent heating stage may be referred to as "low temperature steam") which has a good softening effect on the oil stain on the impeller 111 so as to remove the oil stain; the low-temperature steam generated in the intermittent heating stage contains liquid water, so that the greasy dirt on the impeller 111 can be washed, and the cleaning effect is improved.

In the example of fig. 12, the heater 121 continues to heat for a time T, after which the heater 121 stops heating for a time B first, then heats for a time a, and intermittent heating is repeated in this cycle. Wherein, during the intermittent heating, the single heating-stop period B of the heater 121 is less than or equal to the single heating period a of the heater 121 to ensure that the heater 121 can supply continuous steam during the heating-stop period; the duration T of the continuous heating of the heater 121 is longer than the duration a of the single heating in the intermittent heating stage, so that the heater 121 can heat the water sufficiently to generate steam with higher temperature and pressure, and soften the greasy dirt sufficiently in the period T, so as to clean the greasy dirt on the surface to be cleaned in the intermittent heating stage, thereby improving the cleaning effect.

Finally, it should be noted that the above-mentioned embodiments are merely illustrative of the utility model, and not limiting. Although the utility model has been described in detail with reference to the embodiments, those skilled in the art will understand that various combinations, modifications, or equivalent substitutions can be made to the technical solutions of the present utility model without departing from the spirit and scope of the technical solutions of the present utility model.

Claims (11)

1. A steam cleaning system, comprising:

a water tank (120);

the heater (121), the said heater (121) forms the heating cavity, the said heating cavity is communicated with said water tank (120), the said heater (121) is used for heating the water in the said heating cavity, the highest liquid level line of the said water tank is higher than the said heating cavity is located in the height;

a spray head (122), the spray head (122) being in communication with the heater (121).

2. The steam cleaning system of claim 1, further comprising a one-way valve (123), the one-way valve (123) being disposed between the water tank (120) and the heater (121), the one-way valve (123) being configured to prevent fluid within the heater (121) from pouring into the water tank (120).

3. The steam cleaning system of claim 1, wherein a positional height of the spray head (122) is greater than a positional height of the highest level line.

4. The steam cleaning system of claim 1, wherein a lowest level line of the tank is at a higher elevation than the heating chamber.

5. The steam cleaning system of claim 1, wherein the spray head (122) is in communication with the heater (121) via a hose;

alternatively, the water tank (120) is connected with the heater (121) through a hose.

6. A range hood (100), comprising:

a first housing (110);

a second housing (112), the second housing (112) being connected to the first housing (110) and being located at the bottom of the first housing (110);

an impeller (111), the impeller (111) being rotatably provided within the first housing (110);

a steam cleaning system according to any one of claims 1-5, at least a spray head (122) of the steam cleaning system being arranged in the first housing (110).

7. The range hood (100) of claim 6, wherein the heater (121) is disposed within the second housing (112), the spray head (122) is disposed within the first housing (110), and is adapted to spray cleaning fluid toward the impeller (111); the water tank (120) is arranged on the first shell (110) or the second shell (112), and the vertical distance between the water tank (120) and the bottom of the second shell (112) is larger than the vertical distance between the heater (121) and the bottom of the second shell (112).

8. The range hood (100) of claim 7, wherein the water tank (120) is disposed on top of the second housing (112).

9. The range hood (100) of claim 8, further comprising a fixing base (130), wherein the fixing base (130) is mounted on the second housing (112), one end of the fixing base (130) is detachably connected and communicated with the water tank (120), and the other end of the fixing base (130) is connected and communicated with the heater (121).

10. The range hood (100) of claim 7, wherein the water tank (120) is provided inside the first housing (110);

the first shell (110) is provided with a front plate, a water receiving port (124) is arranged on the front plate, and a water inlet of the water tank (120) is communicated with the water receiving port (124) through a communicating pipe.

11. The range hood (100) according to claim 7, wherein the water tank (120) is disposed at an outer side of the first housing (110), the water tank (120) is provided with a pipe joint (126), the pipe joint (126) is communicated with the heater (121) through a connecting pipe, a check valve (123) is disposed between the water tank (120) and the heater (121), and the check valve (123) is disposed in the pipe joint (126).