Heating type air inlet ring, self-cleaning fan and range hood

Abstract

The utility model relates to a heating type air inlet ring, a self-cleaning fan and a range hood, which can reduce the cost, improve the heat utilization rate and realize the self-cleaning of the air inlet ring while performing jet cleaning on an impeller and / or a volute. The heating type air inlet ring comprises an annular ring body which is provided with an air inlet hole, a heating cavity arranged around the air inlet hole, a pressure maintaining cavity communicated with the heating cavity and arranged around the air inlet hole, a liquid inlet communicated with the heating cavity and a nozzle set communicated with the pressure maintaining cavity; and the heating body is integrated in the annular ring body, is positioned in the heating chamber and is used for generating heat in the heating chamber.

Description

Technical Field

[0001] The utility model relates to the technical field of kitchen equipment, in particular to a heating type air inlet ring, a self-cleaning fan and a range hood. Background Art

[0002] With the continuous advancement of range hood self-cleaning technology, steam cleaning or water cleaning has been widely used in the field of range hood self-cleaning. The basic principle is that the steam generator generates steam or the water pump pumps water, and the steam or water is transported to the nozzle at the end of the nozzle. The steam or water is quickly ejected from the nozzle to flush the impeller and volute for cleaning.

[0003] At present, in the existing range hood cleaning technology, the heating module is usually an independent module equipped with a heat insulation layer and a metal shell to be placed outside the volute, and the cleaning pipeline is used to transport steam or hot water to the inside of the volute for spraying to achieve self-cleaning of the range hood. However, after each user finishes cooking, the inside of the existing range hood will enter a natural cooling state, which will cause the fluidity of the oil droplets flowing in the volute, impeller and air duct to decrease, resulting in problems such as dripping on the volute tongue and oil stains adhering to the inner wall of the volute and the surface of the impeller; this results in the existing range hood needing to frequently start the heating module outside the volute to spray hot water or steam into the volute for cleaning, which not only has high costs, but also has problems such as low heat utilization and inability to clean the air inlet ring. Utility Model Content

[0004] In view of the fact that existing range hoods need to frequently start the heating module outside the volute to spray hot water or steam into the volute for cleaning, which is not only costly but also has problems such as low heat utilization and inability to clean the air inlet ring, the present application provides a heated air inlet ring, a self-cleaning fan and a range hood.

[0005] In order to achieve at least one of the above advantages or other advantages and purposes of the utility model, the utility model provides a heated air inlet ring, comprising:

[0006] an annular ring body, comprising an air inlet, a heating chamber arranged around the air inlet, a pressure-maintaining chamber connected to the heating chamber and arranged around the air inlet, a liquid inlet connected to the heating chamber, and a nozzle group connected to the pressure-maintaining chamber; and

[0007] The heating element is integrated into the annular ring body and located in the heating chamber, and is used for generating heat in the heating chamber.

[0008] According to an embodiment of the present application, the heating chamber extends in a curved manner around the air inlet.

[0009] According to one embodiment of the present application, the heating element is an electric heating tube embedded in the annular ring body and partially exposed in the heating chamber.

[0010] According to one embodiment of the present application, the liquid inlet is located at the lower part of the annular ring body, and the connecting passage between the heating chamber and the pressure maintaining chamber is located at the upper part of the annular ring body.

[0011] According to one embodiment of the present application, the nozzle group includes one or more first nozzles arranged on the inner side wall of the annular ring body, and is used to spray hot water or steam toward the impeller.

[0012] According to an embodiment of the present application, the first nozzle is located on the inner side wall of the annular ring body at a position adjacent to the air inlet hole, and extends obliquely along the axial direction of the annular ring body.

[0013] According to one embodiment of the present application, the nozzle group further includes a plurality of second nozzles arranged at intervals on the outer peripheral wall of the annular ring body around the air inlet hole, and used for spraying hot water or steam toward the volute.

[0014] According to one embodiment of the present application, the second nozzle is located on the outer peripheral wall of the annular ring body close to the inner side wall.

[0015] According to another aspect of the present application, the present application further provides a self-cleaning blower, comprising:

[0016] snail shell;

[0017] an impeller rotatably disposed within the volute; and

[0018] Any of the above-mentioned heating air inlet rings is fixed to the volute and arranged corresponding to the impeller.

[0019] According to another aspect of the present application, the present application further provides a range hood, comprising:

[0020] a housing; and

[0021] The self-cleaning blower is assembled on the housing.

[0022] In summary, the range hood of the present application not only does not require an additional insulation layer and metal shell outside the volute, which helps to reduce costs and improve integration, but also can heat the cleaning medium to generate steam or hot water for cleaning, while heating the air inside the volute by thermal radiation, so that the oil stains on the volute and impeller are heated to maintain good fluidity, achieving 100% utilization of heat, greatly improving cleaning efficiency, and avoiding problems such as dripping from the volute tongue.

[0023] In addition, the annular ring body integrated with the heating element can maintain a relatively high temperature itself, so that the oil stains on the annular ring body can be directly heated to have better fluidity and flow back into the oil cup; at the same time, the steam or hot water sprayed by the nozzle group opened in the annular ring body can also take away part of the oil stains, thereby realizing self-cleaning of the air inlet ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a three-dimensional schematic diagram of a self-cleaning blower according to an embodiment of the utility model;

[0025] Figure 2 A cross-sectional schematic diagram of a self-cleaning blower according to the above embodiment of the utility model is shown;

[0026] Figure 3 Shows Figure 2 An enlarged schematic diagram of a part C in the self-cleaning blower shown;

[0027] Figure 4 An example of a heated air inlet ring in a self-cleaning blower according to the above embodiment of the utility model is shown;

[0028] Figure 5 A schematic structural diagram of the heating air inlet ring according to the above example of the utility model at another viewing angle is shown;

[0029] Figure 6 A three-dimensional cross-sectional schematic diagram of a heated air inlet ring according to the above example of the utility model is shown;

[0030] Figure 7 A schematic side view of the heated air inlet ring according to the above example of the utility model is shown;

[0031] Figure 8 Shows Figure 7 AA cross-sectional view of the heated air inlet ring shown;

[0032] Fig. 9 Shows Figure 7 The BB cross-sectional diagram of the heated air inlet ring is shown.

[0033] Explanation of the main component symbols: 1. Self-cleaning fan; 10. Volute; 11. Annular wall; 12. Volute tongue; 13. End cover; 20. Impeller; 21. Blade; 30. Heating air inlet ring; 31. Annular ring body; 3101. Inner wall; 3102. Outer wall; 310. Air inlet hole; 311. Heating chamber; 312. Pressure maintaining chamber; 313. Liquid inlet; 314. Nozzle group; 3141. First nozzle; 3142. Second nozzle; 32. Heating element; 320. Electric heating tube; 33. Indicator mark.

[0034] The above main component symbols are combined with the accompanying drawings and specific implementation methods to further illustrate the present invention in detail. DETAILED DESCRIPTION

[0035] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0036] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0037] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0038] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0040] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0041] Considering that the existing range hoods need to frequently start the heating module outside the volute to spray hot water or steam into the volute for cleaning, it is not only costly, but also has problems such as low heat utilization and inability to clean the air inlet ring. Therefore, the present application provides a heating air inlet ring, a self-cleaning fan and a range hood, which can reduce costs, improve heat utilization, and can realize self-cleaning of the air inlet ring while spraying and cleaning the impeller and / or volute.

[0042] Specifically, according to another aspect of the present application, Figure 1 and Figure 2 As shown, one embodiment of the present application provides a range hood, which may include a housing (not shown) and a self-cleaning fan 1 assembled on the housing for absorbing oil smoke. It is understandable that the range hood of the present application may also include, but is not limited to, a water tank, a water receiving box and / or a sensor to assist in completing the oil smoke absorbing function, which will not be described in detail in the present application.

[0043] More specifically, if Figures 1 to 9As shown, the self-cleaning fan 1 of the present application may include a volute 10, an impeller 20 rotatably disposed in the volute 10, and a heating air inlet ring 30 fixed to the volute 10 and arranged corresponding to the impeller 20. The heating air inlet ring 30 includes an annular ring body 31 and a heating element 32; the annular ring body 31 has an air inlet hole 310, a heating chamber 311 arranged around the air inlet hole 310, a pressure-maintaining chamber 312 connected to the heating chamber 311 and arranged around the air inlet hole 310, a liquid inlet 313 connected to the heating chamber 311, and a nozzle group 314 connected to the pressure-maintaining chamber 312; the heating element 32 is integrated in the annular ring body 31 and located in the heating chamber 311, and is used to generate heat in the heating chamber 311. It is understandable that the self-cleaning fan 1 mentioned in the present application may also include a driving member for driving the impeller 20 to rotate, such as a motor, etc., which will not be described in detail in the present application.

[0044] In this way, when the user finishes cooking, the heating air inlet ring 30 can intermittently start the heating element 32 to heat the annular ring body 31, so as to radiate heating to the volute 10 and the impeller 20, so that the temperature inside the volute 10 is stably between 50°C and 75°C, and then cooperates with the low-speed rotation of the impeller 20 to ensure that the oil droplets on the inner wall surface of the volute 10, the surface of the impeller 20 and the air duct (not shown in the figure) can maintain fluidity for a long time, so that more oil droplets can flow back into the oil cup, realize daily cleaning, so as to keep the inside of the fan clean as much as possible. In addition, when the user starts the automatic cleaning function of the range hood, the cleaning liquid (such as water) flows into the heating chamber 311 through the liquid inlet 313 under the transportation of the water pump, and is heated into hot water or steam by the heating element 32, and then flows from the heating chamber 311 into the pressure holding chamber 312 to be sprayed out through the nozzle group 314, so that the inner wall surface of the volute 10 and the surface of the impeller 20 are washed with high temperature and high pressure, and cooperate with the heat radiation of the annular ring body 31 to achieve regular cleaning, so as to double clean the oil stains adhered to the inner wall surface of the volute 10 and the surface of the impeller 20, which helps to improve the cleaning efficiency and facilitate energy saving and consumption reduction.

[0045] In particular, when the range hood runs a cleaning program, the heating element 32 can be controlled to heat for dry burning, and the oil stains adhered to the volute 10 and the impeller 20 can be radiated with heat to reduce the viscosity of the oil stains; water is then supplied to the heating chamber 311 through the liquid inlet 313 to perform steam or hot water flushing, which helps to improve the oil removal efficiency of the range hood.

[0046] It is worth noting that, since the heating element 32 is integrated into the heating chamber 311 of the annular ring body 31, the range hood of the present application not only does not need to set an additional insulation layer and metal shell outside the volute, which helps to reduce costs and improve integration, but also can heat the air inside the volute 10 by heat radiation while heating the cleaning medium to generate steam or hot water for cleaning, so that the oil stains on the volute 10 and the impeller 20 are heated to maintain good fluidity, achieve 100% utilization of heat, greatly improve cleaning efficiency, and avoid problems such as volute tongue dripping. In addition, the annular ring body 31 integrated with the heating element 32 can maintain a high temperature itself, so that the oil stains on the annular ring body 31 can be directly heated to have good fluidity and flow back to the oil cup; at the same time, the steam or hot water sprayed by the nozzle group 314 opened in the annular ring body 31 can also take away part of the oil stains, realizing the self-cleaning of the air inlet ring.

[0047] For example, Figure 1 and Figure 2 As shown, the volute 10 of the self-cleaning fan 1 may include an annular wall 11, a volute tongue 12 protruding outward from the annular wall 11, and a pair of end covers 13 fixedly connected to the axial ends of the annular wall 11; the annular ring body 31 of the heating air inlet ring 30 is fixedly connected to the end cover 13 to define the air inlet of the self-cleaning fan 1. It can be understood that the end cover 13 of the present application is provided with a through hole that connects the space outside the volute 10 with the air inlet cavity in the impeller 20, so as to correspond to the air inlet hole 310 of the annular ring body 31 to form the air inlet of the self-cleaning fan 1 together.

[0048] Alternatively, if Figure 2 As shown, the impeller 20 is provided with a plurality of blades 21 extending in the axial direction at intervals along the circumferential direction. It is understood that the inner edges of all blades 21 on the impeller 20 cooperate to form the air inlet cavity of the impeller 20; at the same time, the outer edges of all blades 21 on the impeller 20 cooperate with the volute to form the air outlet cavity of the impeller 20. In addition, the axial direction mentioned in the present application refers to the direction parallel to the central axis of the impeller 20; the radial direction mentioned in the present application refers to the direction perpendicular to the central axis of the impeller 20; and the circumferential direction mentioned in the present application refers to the direction surrounding the central axis of the impeller 20.

[0049] Alternatively, if Figure 8 and Fig. 9 As shown, the heating chamber 311 of the annular ring body 31 extends in a curved manner around the air inlet hole 310 to increase the overall length of the heating chamber 311, which not only extends the flow path of the cleaning medium in the heating chamber 311 to increase the heating time of the heating element 32 for the cleaning medium, but also increases the disturbance of the cleaning medium flowing in the heating chamber 311 to improve the heat exchange efficiency, thereby improving the heating efficiency.

[0050] Alternatively, if Figure 4 , Figure 5 as well as Figure 8 As shown, the liquid inlet 313 is located at the lower part of the annular ring body 31, and the communication channel between the heating chamber 311 and the pressure-maintaining chamber 312 is located at the upper part of the annular ring body 31. In this way, the cleaning medium input through the liquid inlet 313 will first flow into the lower part of the heating chamber 311, and then flow upward into the upper part of the heating chamber 311 to flow into the pressure-maintaining chamber 312 after forming hot water or steam, so as to ensure that the cleaning medium can fully contact the heating element 32 to improve the heating efficiency.

[0051] Preferably, if Figure 8 and Fig. 9 As shown, the liquid inlet 313 is located at the lowest point of the heating chamber 311, and the highest point of the heating chamber 311 is connected to the pressure-maintaining chamber 312, so that the cleaning medium will flow into the pressure-maintaining chamber 312 only after filling the heating chamber 311, ensuring that the cleaning medium is fully heated to form the required hot water or steam before entering the pressure-maintaining chamber 312 for high-temperature and high-pressure flushing.

[0052] Alternatively, if Figure 6 and Fig. 9 As shown, the heating element 32 is implemented as an electric heating tube 320 embedded in the annular ring body 31 and partially exposed in the heating chamber 311, so that while the heating element 32 is firmly integrated into the annular ring body 31, the annular ring body 31 and the cleaning medium located in the heating chamber 311 are directly heated simultaneously, which is beneficial to efficiently heating the annular ring body 31 and the cleaning medium.

[0053] According to the above embodiments of the present application, Figure 3 , Figure 5 as well as Figure 6 As shown, the nozzle group 314 of the annular ring body 31 may include one or more first nozzles 3141 extending toward the impeller 20. The one or more first nozzles 3141 are arranged on the inner wall 3101 of the annular ring body 31, and are used to spray high-temperature and high-pressure hot water or steam toward the impeller 20 for high-temperature and high-pressure flushing.

[0054] Alternatively, if Figure 3 , Figure 5 as well as Figure 6 As shown, the first nozzle 3141 is located on the inner wall 3101 of the annular ring body 31 adjacent to the air inlet 310, and extends obliquely along the axial direction of the annular ring body 31 so as to spray high-temperature and high-pressure hot water or steam toward the concave surface of the impeller 20 (i.e., the inner concave side of the blade 21) to improve the cleaning efficiency.

[0055] Alternatively, if Figure 3 , Figure 5 , Figure 6 as well as Figure 7 As shown, the nozzle group 314 of the annular ring body 31 further includes a plurality of second nozzles 3142 extending toward the volute 10. The plurality of second nozzles 3142 are arranged at intervals on the outer peripheral wall 3102 of the annular ring body 31 around the air inlet hole 310, and are used to spray high-temperature and high-pressure hot water or steam toward the volute 10 for high-temperature and high-pressure flushing.

[0056] Alternatively, if Figure 3 , Figure 6 as well as Figure 7 As shown, the second nozzle 3142 is located on the outer peripheral wall 3102 of the annular ring body 31 close to the inner wall 3101 so as to spray hot water or steam toward the middle of the annular wall 11 and the volute tongue 12 to improve the cleaning quality.

[0057] It is worth noting that since the impeller 20 will rotate relative to the annular ring body 31 during the cleaning process, even if the annular ring body 31 of the present application is only provided with one first nozzle 3141, it is possible to achieve comprehensive cleaning of the impeller 20; in particular, a plurality of first nozzles 3141 are arranged on the inner wall 3101 of the annular ring body 31 of the present application, and the inclination angles of the plurality of first nozzles 3141 are different, so as to spray hot water or steam to different parts of the impeller 20, thereby facilitating better cleaning of the impeller.

[0058] In addition, since the volute 10 is fixed relative to the annular ring body 31, the multiple second nozzles 3142 of the present application need to be arranged at intervals on the outer peripheral wall 3102 of the annular ring body 31 around the air inlet hole 310, wherein the multiple second nozzles 3142 can be evenly spaced around the air inlet hole 310, or unevenly spaced, so as to reasonably arrange the distribution density of the second nozzles 3142 according to the adhesion law of oil stains. For example, the distribution density toward the volute tongue 12 is greater than the distribution density toward the annular wall 11, so as to focus on cleaning the volute tongue 12 where oil stains are easy to adhere and drip. Of course, in other examples of the present application, multiple circles of second nozzles 3142 can be axially arranged on the outer peripheral wall 3102 of the annular ring body 31, so as to spray hot water or steam to different axial positions of the annular wall 11 and the volute tongue 12, which helps to increase the cleaning area and improve the cleaning effect.

[0059] According to the above embodiments of the present application, Figure 4 and Figure 5As shown, the heating air inlet ring 30 may further include an indicator mark 33 fixed to the annular ring body 31 for indicating the installation direction of the annular ring body 31 so as to ensure that when the annular ring body 31 is installed to the volute 10, the liquid inlet 313 is located at the lowest point of the heating chamber 311.

[0060] Alternatively, if Figure 4 and Figure 5 As shown, the indicator mark 33 is implemented as an upward arrow hole opened on the top of the annular ring body 31. It is understandable that in other examples of the present application, the indicator mark 33 can also be implemented as other types of marks such as patterns, words or symbols, as long as they can indicate the installation direction of the annular ring body 31, and the present application will not repeat them.

[0061] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0062] The above embodiments only express several implementation methods of the utility model, and the descriptions are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model.

Claims

1. Heating air inlet ring, characterized in that: include: An annular ring body, comprising an air inlet, a heating chamber arranged around the air inlet, a pressure-maintaining chamber connected to the heating chamber and arranged around the air inlet, a liquid inlet connected to the heating chamber, and a nozzle group connected to the pressure-maintaining chamber; and The heating element is integrated into the annular ring body and located in the heating chamber, and is used for generating heat in the heating chamber.

2. The heated air inlet ring according to claim 1, characterized in that: The heating chamber extends in a curved manner around the air inlet.

3. The heated air inlet ring according to claim 2, characterized in that: The heating element is an electric heating tube embedded in the annular ring body and partially exposed in the heating chamber.

4. The heated air inlet ring according to claim 1, characterized in that: The liquid inlet is located at the lower part of the annular ring body, and the communication channel between the heating chamber and the pressure-maintaining chamber is located at the upper part of the annular ring body.

5. The heated air inlet ring according to any one of claims 1 to 4, characterized in that: The nozzle group includes one or more first nozzles arranged on the inner side wall of the annular ring body, and is used for spraying hot water or steam toward the impeller.

6. The heated air inlet ring according to claim 5, characterized in that: The first nozzle is located on the inner side wall of the annular ring body at a position adjacent to the air inlet hole, and extends obliquely along the axial direction of the annular ring body.

7. The heated air inlet ring according to claim 5, characterized in that: The nozzle group further includes a plurality of second nozzles which are arranged at intervals on the outer peripheral wall of the annular ring body around the air inlet hole and are used for spraying hot water or steam toward the volute.

8. The heated air inlet ring according to claim 7, characterized in that: The second nozzle is located on the outer peripheral wall of the annular ring body at a position close to the inner side wall.

9. Self-cleaning fan, characterized in that: include: snail shell; an impeller rotatably disposed within the volute; as well as The heating air inlet ring as described in any one of claims 1 to 8 is fixed to the volute and arranged corresponding to the impeller.

10. A range hood, characterized in that: include: case; and The self-cleaning blower according to claim 9, wherein the self-cleaning blower is assembled to the housing.

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