Impeller and range hood

Abstract

The application relates to the technical field of kitchen appliances, in particular to an impeller and a range hood. The impeller comprises a first mounting plate, a second mounting plate and a plurality of blades, the blades are arranged between the first mounting plate and the second mounting plate, a sealing channel is arranged on the blade, the sealing channel is used for placing refrigeration medium, and the arrangement shape of the sealing channel is net-shaped. The refrigeration medium in the sealing channel is self-flowed due to temperature difference, the local heat of the impeller is quickly and evenly dispersed to the surface of the whole impeller, the effect of quickly cooling the oil fume mixture is achieved, the separation effect of the oil fume is improved, and the environmental pollution caused by the smoke to the outdoor air is reduced. The range hood can effectively improve the smoke suction effect by applying the above-mentioned impeller, the weight load of the impeller is reduced, the power of the range hood is reduced, and the air volume and air pressure performance of the range hood are ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of kitchen appliances, in particular to a kind of impeller and range hood. BACKGROUND

[0002] Range hood is a kind of kitchen appliance for purifying kitchen environment, range hood is usually installed above kitchen stove to quickly suck away waste of stove combustion and oil fume harmful to human body generated during cooking process and discharge outdoor.

[0003] In prior art, range hood includes main machine, smoke collecting cover, smoke guide structure and filter plate, main machine includes air duct, air duct includes volute, impeller and motor, impeller is arranged in volute, motor is used to drive impeller rotation, smoke collecting cover is arranged below air duct, smoke guide structure is arranged at air inlet position of smoke collecting cover, filter plate is arranged between smoke guide structure and air duct. Impeller rotation generates negative pressure, under the guidance of smoke guide structure, oil fume mixture generated during cooking process and waste of stove combustion can be separated into oil and clean gas after passing through filter plate, and clean gas is discharged to outdoor through air duct.

[0004] But the temperature of inhaled oil fume mixture is high, oil fume mixture is difficult to separate or not completely separated under the centrifugal force of filter plate and impeller, and a large amount of gas containing oil fume causes environmental pollution to outdoor air. In addition, because the temperature of oil fume mixture is too high, the flow speed of oil fume particles is faster, and oil fume particles are more likely to escape from the periphery of smoke collecting cover, polluting the environment in kitchen. In addition, long-term accumulation of oil dirt on impeller leads to excessive load of impeller, which increases the power of range hood, resulting in loss of air volume and air pressure of range hood.

[0005] Therefore, it is urgent to design a new impeller and range hood to improve the above problems. SUMMARY

[0006] One object of the present application is to provide an impeller, which can improve the separation effect of oil fume, reduce the environmental pollution of oil fume to outdoor air, and improve the environmental quality in kitchen; can reduce the weight load of impeller, reduce the power of range hood, and ensure the air volume and air pressure performance of range hood.

[0007] To achieve this object, the present application adopts the following technical solutions:

[0008] An impeller, comprising a first mounting plate, a second mounting plate and a plurality of blades, the blades are arranged between the first mounting plate and the second mounting plate, a sealing channel is formed on the blades, the sealing channel is used to place refrigeration medium, and the arrangement shape of the sealing channel is mesh shape.

[0009] As a preferred solution, the vane comprises a first plate and a second plate which are attached to each other, and at least the first plate is provided with a plurality of communication grooves which are arranged in a mesh shape, and the communication grooves and the second plate form the sealing channel.

[0010] As a preferred solution, the second plate is a flat plate, and the communication grooves and the flat plate form the sealing channel.

[0011] As a preferred solution, the second plate is provided with a plurality of communication grooves which correspond to the communication grooves, and the communication grooves and the communication grooves form the sealing channel.

[0012] As a preferred solution, the impeller further comprises:

[0013] The connecting piece is provided with an accommodation space, the vane is connected to the connecting piece, the sealing channels of the plurality of vanes are communicated with the accommodation space, and the refrigerant flows in the sealing channels and the accommodation space.

[0014] As a preferred solution, the connecting piece is integrally formed with the vane.

[0015] As a preferred solution, the accommodation space is arranged in a mesh shape.

[0016] As a preferred solution, the connecting piece comprises a third plate and a fourth plate, and at least the third plate is provided with a plurality of accommodation grooves which are arranged in a mesh shape, and the accommodation grooves and the fourth plate form the accommodation space.

[0017] As a preferred solution, the communication grooves surround a plurality of solid regions, each of the solid regions is provided with at least three other solid regions, a first flow channel is formed between the solid region and the other solid regions, a second flow channel is formed between adjacent other solid regions, and the first flow channel and the second flow channel are communicated with each other.

[0018] As a preferred solution, the plurality of solid regions are arranged in an array, and adjacent two rows of solid regions are staggered, and the solid regions are circular or regular hexagonal.

[0019] As a preferred solution, the communication grooves surround a plurality of solid region groups which are arranged in a plurality of rows along a first direction, and adjacent solid region groups are mirror arranged, the solid region group comprises a plurality of regular triangular solid regions which are arranged along a second direction, the first direction is perpendicular to the second direction, the regular triangular solid regions of the same row of solid region groups are alternately arranged along the second direction, and the side edges of adjacent regular triangular solid regions of the same row are arranged in parallel.

[0020] Preferably, the first protrusion is provided with the first plate, and the first protrusion is formed with the communication groove on the side away from the protruding direction, and the cross section of the first protrusion is arc-shaped.

[0021] Preferably, the impeller is made of a heat-conducting material.

[0022] Another object of the present application is to provide an extractor hood, which can improve the effect of rapid cooling of the oil fume mixture, so as to achieve a better separation effect of the oil fume, reduce the environmental pollution caused by the oil fume to the outdoor air, and also improve the environmental quality in the kitchen. The air in the smoke gathering cavity can be sucked away without very large suction force or smoke gathering area, the phenomenon of oil fume escaping is solved, and the smoke suction effect is effectively improved. The weight load of the impeller is reduced, the power of the extractor hood is reduced, the air volume and air pressure performance of the extractor hood are ensured to be better. The harmonic sound generated when the extractor hood shifts gears is effectively reduced, and the sound quality of the extractor hood is improved.

[0023] To achieve this purpose, the present application adopts the following technical solutions:

[0024] An extractor hood comprises a main machine, the main machine comprises an air duct, the air duct comprises a volute and an impeller as described above, and the impeller is arranged in the volute.

[0025] The present application has the following advantages:

[0026] The present application provides an impeller, which comprises a first mounting plate, a second mounting plate and a plurality of blades, the blades are arranged between the first mounting plate and the second mounting plate, a sealing channel is formed in the blades, the sealing channel is used for placing a refrigeration medium, and the arrangement shape of the sealing channel is mesh-shaped. The refrigeration medium flows in the sealing channel due to temperature difference, so that the local heat of the impeller is quickly and evenly distributed to the surface of the whole impeller, the effect of rapid cooling of the oil fume mixture is achieved, a better separation effect of the oil fume is achieved, the environmental pollution caused by the oil fume to the outdoor air is reduced, and the environmental quality in the kitchen is improved. The condensate oil can be quickly and efficiently thrown out of the blades, the long-term cleanliness of the blades on the impeller can be effectively improved, the blades are prevented from being firmly adhered by the oil due to long-term use of the extractor hood, the weight load of the impeller is reduced, the power of the extractor hood is reduced, the air volume and air pressure performance of the extractor hood are ensured to be better.

[0027] The extractor hood provided by the present application applies the above-mentioned impeller, so as to achieve the effect of rapid cooling of the oil fume mixture, achieve a better separation effect of the oil fume, reduce the environmental pollution caused by the oil fume to the outdoor air, and improve the environmental quality in the kitchen. The air in the smoke gathering cavity can be sucked away without very large suction force or smoke gathering area, the phenomenon of oil fume escaping is solved, and the smoke suction effect is effectively improved. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a structural schematic diagram of the range hood provided by the embodiment of the present application Figure 1 ;

[0029] Figure 2 is a structural schematic diagram of the range hood provided by the embodiment of the present application Figure 2 ;

[0030] Figure 3 is a structural schematic diagram of the impeller provided by the embodiment of the present application

[0031] Figure 4 is a sectional view of the impeller provided by the embodiment of the present application Figure 1 ;

[0032] Figure 5 is a sectional view of the blade (excluding refrigerant medium) provided by the embodiment of the present application

[0033] Figure 6 is a sectional view of the blade (including refrigerant medium) provided by the embodiment of the present application

[0034] Figure 7 is a structural schematic diagram of the first plate provided by the embodiment of the present application

[0035] Figure 8 is a sectional view of the impeller provided by the embodiment of the present application Figure 2 ;

[0036] Figure 9 is Figure 8 a local enlarged view of A in FIG. 8.

[0037] in the figure:

[0038] 100 - range hood

[0039] 10 - smoke guide structure

[0040] 20 - main machine; 21 - air duct; 211 - volute; 212 - impeller; 213 - motor; 231 - first mounting plate; 232 - second mounting plate; 233 - blade; 2331 - first plate; 23311 - first protrusion; 233111 - communication groove; 23312 - solid area; 2332 - second plate; 2333 - sealing channel; 2335 - refrigerant medium; 234 - connecting piece; 2341 - weight-reducing hole; 2342 - accommodating space; 2343 - third plate; 2344 - fourth plate

[0041] 30 - filter plate

[0042] 40 - smoke collecting cover; 41 - air inlet DETAILED DESCRIPTION

[0043] The technical solutions of the present application will be further described below in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, but not to limit the present application. In addition, it should be noted that, for the convenience of description, only the parts related to the present application are shown in the drawings, but not all.

[0044] In the description of the present application, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or detachably connected, or integrated; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0045] In the present application, unless otherwise explicitly specified and limited, the "upper" or "lower" of the first feature to the second feature can include 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 through another feature between them. Moreover, the "upper", "above" and "on" of the first feature to the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The "below", "under" and "under" of the first feature to the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0046] In the description of the present embodiment, the terms "upper", "lower", "left", "right", and other orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used to distinguish in the description, and have no special meaning.

[0047] As Figure 1 and Figure 2As shown, this embodiment provides a range hood 100, which includes a main unit 20, a smoke collection hood 40, a smoke guiding structure 10, and a filter plate 30. The main unit 20 includes an air duct 21, which includes a volute 211, an impeller 212, and a motor 213. The impeller 212 is disposed inside the volute 211, and the motor 213 drives the impeller 212 to rotate. The smoke collection hood 40 is disposed below the air duct 21, and the smoke guiding structure 10 is disposed at the air inlet 41 of the smoke collection hood 40. The filter plate 30 is disposed between the smoke guiding structure 10 and the air duct 21. The rotation of the impeller 212 generates negative pressure, which allows the mixture of combustion waste and cooking fumes to be separated from the grease under the guidance of the smoke guiding structure 10 and filtered through the filter plate 30. The clean gas is then discharged outdoors through the air duct 21.

[0048] Combination Figure 3 and Figure 4 The structure of impeller 212 is described as follows: Figure 3 and Figure 4 As shown, the impeller 212 includes a first mounting plate 231, a second mounting plate 232, and a plurality of blades 233. The blades 233 are disposed between the first mounting plate 231 and the second mounting plate 232, and the plurality of blades 233 are evenly distributed around the center line of the first mounting plate 231. When the impeller 212 rotates, the blades 233 agitate the air to create a negative pressure. The blades 233 can be straight or curved.

[0049] As a preferred option, such as Figures 5-7 As shown, the blade 233 has a sealed channel 2333 for holding the refrigerant 2335. The sealed channel 2333 is arranged in a mesh shape. In this embodiment, the blade 233 can achieve the flow of the refrigerant 2335 without the use of external power. Through the mesh-like sealed channel 2333, the refrigerant 2335 flows by itself inside the sealed channel 2333 due to the temperature difference, thereby quickly and evenly dispersing the local heat of the blade 233 to the entire surface of the blade 233. This achieves the effect of rapid cooling of the oil fume mixture, improving the separation effect of oil fumes, reducing the environmental pollution caused by oil fumes to outdoor air, and improving the environmental quality in the kitchen. Specifically, the refrigerant 2335 can be water, refrigerant, etc.

[0050] Furthermore, according to the ideal gas law pV=nRT, the pressure of a gas is p=nRT / V. The pressure of a gas in a region is proportional to its temperature. Here, p refers to the pressure of the ideal gas, V is the volume of the ideal gas, n represents the amount of gas, T represents the thermodynamic temperature of the ideal gas, and R is the ideal gas constant.

[0051] The oil fume generated by the user during cooking and the environment above the cooktop increase the air pressure in the smoke collecting cavity of the range hood, so that the atmospheric pressure in the smoke collecting cavity is greater than the atmospheric pressure of the external normal temperature, thereby accelerating the speed of the oil fume gas flowing to the low pressure area. Once the suction force or the smoke collecting area of the range hood 100 is not large enough, the oil fume escape phenomenon is easily caused. The blade 233 with the mesh-shaped sealing channel 2333 of the embodiment can quickly conduct and radiate heat from the air temperature above the cooktop, thereby reducing the temperature of the smoke collecting cavity area of the range hood 100, i.e. reducing the pressure in the area and the pressure difference with the external normal temperature air, thereby reducing the speed of the gas flow in the smoke collecting cavity. At this time, the range hood 100 can not need a very large suction force or smoke collecting area to suck away the air in the smoke collecting cavity, solving the oil fume escape phenomenon and effectively improving the smoke suction effect.

[0052] In addition, the refrigeration medium 2335 in the sealing channel 2333 is distributed on the outermost side of the blade 233 due to the centrifugal force while the impeller 212 rotates at high speed, and the inertia of the impeller 212 is increased. When the motor 213 switches gears, the speed of the impeller 212 will also decrease as the output speed of the motor 213 decreases, but the impeller 212 with increased inertia will be slower and smoother when the speed changes, which will reduce the fluctuation noise generated when the motor 213 shifts gears, effectively reducing the harmonic noise generated when the range hood 100 shifts gears and improving the sound quality of the range hood 100. The refrigeration medium 2335 can effectively improve the condensation oil speed of the impeller 212, and the centrifugal force of the high-speed rotation of the impeller 212 can quickly and efficiently throw out the condensed oil from the blade 233. The long-term cleanliness of the blade 233 on the impeller 212 can be effectively improved, avoiding the blade 233 being stuck by oil due to long-term use of the range hood 100, causing the weight load of the impeller 212 to increase, reducing the power of the range hood 100, and ensuring better air volume and air pressure performance of the range hood 100.

[0053] Although existing range hoods also have structures that enable rapid heat exchange of the blades 233, for example, range hoods also include compressors, condensers, and capillary tubes. The blades 233 are provided with channels that are distributed in a tortuous manner. The compressor, condenser, capillary tube, and blades 233 are sequentially and sealed together through pipelines to form a refrigerant circulation system. When the compressor works, the refrigerant 2335 flows in the refrigerant circulation system, thereby achieving the effect of cooling the blades 233 and also playing a certain role in separating grease. However, the above-mentioned refrigerant circulation system has the following problems: 1) An additional compressor is required to provide flow to the refrigerant 2335, and the pipeline structure is complex and costly; 2) The compressor, condenser, capillary tube and blades 233 need to be connected by pipelines. The blades 233 cannot be disassembled and cleaned, which affects the filtration effect of the range hood on oil fumes. In severe cases, the oil accumulated on the blades 233 will drip onto the kitchen stove, thus polluting the kitchen environment; 3) The meandering channel is a single-channel form, the refrigerant 2335 flows in one direction, the path is single, the heat dissipation efficiency of the blades 233 is low, resulting in the blades 233 not being effective in separating grease.

[0054] Compared to existing refrigerant circulation systems, the blade 233 of this application has several advantages. First, it eliminates the need for external power to flow the refrigerant 2335. It also eliminates the compressor, condenser, capillary tube, and piping found in existing range hoods, resulting in a simpler structure and lower cost. Second, by eliminating these components, the blade 233 is an independent structure, allowing for quick and easy assembly and disassembly of the blade 233 from the smoke collection hood 40. This facilitates timely cleaning of the blade 233, ensuring effective separation of grease from the fumes and preventing grease buildup on the blade, thus avoiding oil dripping onto the kitchen stove and maintaining a clean kitchen environment. Secondly, because the heat carried by the fumes and the time it takes to generate them are dynamic and not uniformly stable, this causes a localized temperature increase in the blades 233 that come into contact with the fumes. Since this temperature increase accelerates the movement of molecules in the flowing material, the cooling medium 2335 in the blades 233 will rapidly move between different areas with temperature differences, i.e., from areas with relatively higher temperatures to areas with relatively lower temperatures. Figure 7 As shown, the sealed channels 2333 are distributed in a network. The refrigerant 2335 in each relatively high temperature area can quickly transfer heat to the entire blade 233 through multiple paths, thus achieving a rapid cooling effect on the oil fumes. Compared with the traditional single channel with a tortuous distribution, the blade 233 in this embodiment has a high heat dissipation efficiency, and the blade 233 of the network sealed channel 2333 has a more obvious effect on the separation of grease.

[0055] Now combined Figures 5-7 The specific structure of blade 233 is explained, such as...Figures 5-7 As shown, the leaf 233 comprises a first plate 2331 and a second plate 2332 that are attached to each other, the first plate 2331 is provided with a communication groove 233111, the communication groove 233111 is arranged in a mesh shape, the second plate 2332 is a curved flat plate, and the communication groove 233111 cooperates with the second plate 2332 to form a sealed channel 2333. The assembly of such a leaf 233 does not need to consider the alignment problem, so the processing and production efficiency of such a leaf 233 is high. Specifically, the part of the first plate 2331 and the second plate 2332 that are attached to each other is tightly attached to form a whole through a special high-pressure heating equipment, so as to achieve the effect of stable connection of the first plate 2331 and the second plate 2332. In other embodiments, the part of the first plate 2331 and the second plate 2332 that are attached to each other can also be fixed as a whole through high-pressure riveting, which can also achieve the effect of stable connection of the first plate 2331 and the second plate 2332.

[0056] As shown in Figure 5 , the first plate 2331 of the embodiment is a thin plate, the first plate 2331 is provided with a first protrusion 23311, the side of the first protrusion 23311 away from the protruding direction is formed with a communication groove 233111, and the first protrusion 23311 and the communication groove 233111 can be quickly formed through the processing method of engraving. Figure 5 and Figure 6 As shown, the cross section of the first protrusion 23311 is arc-shaped, and the oil droplets condensed and gathered on the leaf 233 flow better on the curved surface, and the collection and gathering of the oil droplets are more easily realized.

[0057] In other embodiments, the second plate 2332 is provided with a communication groove corresponding to the communication groove 233111, and the communication groove 233111 and the communication groove are connected to form a sealed channel 2333. The cross-sectional area of such a sealed channel 2333 is larger than that of the sealed channel 2333 in Figure 6 , so the sealed channel 2333 can store more refrigerant 2335, so the effect of rapid cooling of oil fume is better, and the smoke suction effect and oil separation degree of the range hood 100 are more effectively improved.

[0058] The first plate 2331 and the second plate 2332 are made of a heat-conducting material, so that the oil fume can be quickly exchanged with the refrigerant 2335, the oil fume can be quickly cooled, and the separation effect of the oil is further improved. Specifically, the heat-conducting material can be an aluminum plate. The thermal conductivity of aluminum is 237 W / mK, which is three times the thermal conductivity of iron (80 W / mK). The heat-conducting effect is good and the cost is low. In addition, the ductility of aluminum material is excellent, the processing is simple, it is not easy to rust and oxidize, the mechanical strength is excellent, the appearance surface treatment process is mature, and it is convenient for batch production and processing of the blade 233. In other embodiments, a material with higher heat-conducting effect can also be used in high-end models, such as gold (317 W / mK), silver (429 W / mK), copper (401 W / mK), etc.

[0059] As shown in Figure 7 , the sealing channel 2333 surrounds a plurality of solid areas 23312, and the plurality of solid areas 23312 are uniformly distributed on the first plate 2331. The sealing channel 2333 has the same width at different positions, so as to ensure the uniformity of the flow speed of the refrigerant 2335 at different positions of the sealing channel 2333, avoid the blockage of the local position of the sealing channel 2333, and ensure that the local heat of the blade 233 is quickly and uniformly dispersed to the surface of the whole blade 233.

[0060] As shown in Figure 7 , the communication groove 233111 surrounds a plurality of solid areas 23312, and the outer periphery of the solid area 23312 is provided with at least three other solid areas 23312. The solid area 23312 and the other solid area 23312 form a first flow channel, the adjacent other solid areas 23312 form a second flow channel, and the first flow channel and the second flow channel are communicated. The refrigerant 2335 near the relatively high temperature area of each solid area 23312 can quickly transfer heat to the whole smoke guide structure 10 through at least three second flow channels, so that the quick cooling effect of the oil fume is realized.

[0061] Further, as shown in Figure 7 , the plurality of solid areas 23312 are arranged in an array, and the solid areas 23312 between the adjacent two rows are staggered. The solid area 23312 is circular or regular hexagonal. The refrigerant 2335 near the relatively high temperature area of each solid area 23312 can quickly transfer heat to the whole smoke guide structure 10 through a plurality of paths, so that the quick cooling effect of the oil fume is realized. Among them, the more the number of sides of the regular polygon, the better the quick diffusion effect of the refrigerant 2335. Of course, in other embodiments, the solid area 23312 can also be a regular triangle, a square, a regular pentagon, etc.

[0062] When the entity area 23312 is a regular triangle, in order to realize the establishment of more branches in limited space, improve the rapid flow of refrigerant 2335, the communication groove 233111 is arranged around the group of entity areas arranged in the first direction, the adjacent entity area groups are mirror image arranged, the entity area group includes a plurality of regular triangles arranged in the second direction, the first direction is perpendicular to the second direction, the regular triangles of the same row are alternately arranged in the second direction, and the side edges of the adjacent regular triangles of the same row are arranged in parallel.

[0063] As shown in Figure 8 and Figure 9 , the impeller 212 further includes a connecting piece 234, a receiving space 2342 is formed in the connecting piece 234, the sealing channels 2333 of the plurality of blades 233 are connected with the connecting piece 234, the sealing channels 2333 are communicated with the receiving space 2342, and the refrigerant 2335 flows in the sealing channels 2333 and the receiving space 2342. The sealing channels 2333 on all the blades 233 are communicated through the receiving space 2342 to form a whole passage of the impeller 212, the refrigerant 2335 can transfer the temperature of each blade 233 in the whole passage of the impeller 212, so that a more optimal heat dissipation and cooling efficiency is achieved, the condensation efficiency of the impeller 212 is greatly improved, and the cleaning frequency of the impeller 212 is reduced. As a preferred solution, as shown in Figure 3 , the connecting piece 234 is provided with a weight-reducing hole 2341, so that the whole impeller 212 can be designed to be lightweight. As a preferred solution, the connecting piece 234 is integrally formed with the blade 233, so that the assembly efficiency of the impeller 212 can be effectively improved. As a preferred solution, the arrangement shape of the receiving space 2342 is mesh-shaped, so that the flow efficiency of the refrigerant 2335 between the connecting piece 234 and the blade 233 is further improved, the condensation efficiency of the impeller 212 is further improved, and the cleaning frequency of the impeller 212 is further reduced.

[0064] As shown in Figure 9 , the connecting piece 234 includes a third plate 2343 and a fourth plate 2344, at least the third plate 2343 is provided with a receiving groove, the arrangement shape of the receiving groove is mesh-shaped, and the receiving groove cooperates with the fourth plate 2344 to form the receiving space 2342. The connecting piece 234 of this structure is convenient for processing and manufacturing of the connecting piece 234.

[0065] As shown in Figure 9 , the third plate 2343 of the embodiment is a thin plate, the third plate 2343 is provided with a protrusion, the receiving groove is formed on the side of the protrusion away from the protrusion direction, and the protrusion and the receiving groove can be quickly formed by the processing mode of engraving.

[0066] In other embodiments, the fourth plate 2344 is provided with a receiving groove corresponding to the receiving slot, and the fourth plate 2344 and the receiving groove are in communication to form a receiving space 2342. The cross-sectional area of the receiving space 2342 is larger than that of the receiving space 2322, and the cross-sectional area of the receiving space 2342 is larger than that of the receiving space 2332. Figure 9 The cross-sectional area of the receiving space 2342 is larger than that of the receiving space 2322, and the cross-sectional area of the receiving space 2342 is larger than that of the receiving space 2332.

[0067] Obviously, the above embodiments of the present application are only examples for clearly illustrating the present application, and are not intended to limit the embodiments of the present application. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. Here, all the embodiments are not required to be exhausted. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. An impeller with the function of generating internal refrigerant self-flow due to temperature difference, comprising a first mounting plate (231), a second mounting plate (232), and a plurality of blades (233), wherein the blades (233) are disposed between the first mounting plate (231) and the second mounting plate (232), characterized in that, The impeller is configured for use in a range hood. The blades (233) have a sealed channel (2333) for placing a cooling medium (2335). The sealed channel (2333) is arranged in a mesh shape. The mesh-like sealed channel (2333) allows the cooling medium (2335) to flow freely inside the sealed channel (2333) due to the temperature difference, so that the local heat of the impeller can be quickly and evenly distributed to the entire surface of the impeller, so that the impeller can cool the oil and smoke mixture in the range hood.

2. The impeller with the function of self-flowing internal refrigerant due to temperature difference as described in claim 1, characterized in that, The blade (233) includes a first plate (2331) and a second plate (2332) that are attached to each other. At least the first plate (2331) is provided with a connecting groove (233111). The connecting groove (233111) is arranged in a mesh shape. The connecting groove (233111) and the second plate (2332) cooperate to form the sealing channel (2333).

3. The impeller with the function of self-flowing internal refrigerant due to temperature difference as described in claim 2, characterized in that, The second plate (2332) is a flat plate, and the sealing channel (2333) is formed between the connecting groove (233111) and the flat plate.

4. The impeller with the function of self-flowing internal refrigerant due to temperature difference as described in claim 2, characterized in that, The second plate (2332) is provided with a communicating groove corresponding to the communicating groove (233111), and the communicating groove (233111) and the communicating groove are connected to form the sealing channel (2333).

5. The impeller with the function of self-flowing internal refrigerant due to temperature difference as described in any one of claims 1 to 4, characterized in that, The impeller also includes: A connector (234) has an accommodating space (2342) inside. The blades (233) are connected to the connector (234). The sealing channels (2333) of the multiple blades (233) are all connected to the accommodating space (2342). The refrigerant (2335) flows in the sealing channels (2333) and the accommodating space (2342).

6. The impeller with the function of self-flowing internal refrigerant due to temperature difference as described in claim 5, characterized in that, The connector (234) is integrally formed with the blade (233).

7. The impeller with the function of self-flowing internal refrigerant due to temperature difference as described in claim 5, characterized in that, The arrangement of the accommodating space (2342) is mesh-like.

8. The impeller with the function of self-flowing internal refrigerant due to temperature difference as described in claim 5, characterized in that, The connector (234) includes a third plate (2343) and a fourth plate (2344). At least the third plate (2343) is provided with a receiving groove. The receiving groove is arranged in a mesh shape. The receiving groove and the fourth plate (2344) cooperate to form the receiving space (2342).

9. The impeller with the function of self-flowing internal refrigerant due to temperature difference as described in any one of claims 2 to 4, characterized in that, The connecting channel (233111) surrounds and forms a plurality of solid regions (23312). At least three other solid regions (23312) are arranged around the outer periphery of the solid region (23312). A first flow channel is formed between the solid region (23312) and the other solid regions (23312), and a second flow channel is formed between adjacent other solid regions (23312). The first flow channel and the second flow channel are connected.

10. The impeller with the function of self-flowing internal refrigerant due to temperature difference as described in claim 9, characterized in that, Multiple physical regions (23312) are arranged in an array, with adjacent rows of physical regions (23312) staggered. The physical regions (23312) are circular or regular hexagonal.

11. The impeller with the function of self-flowing internal refrigerant due to temperature difference as described in claim 9, characterized in that, The connecting groove (233111) surrounds and forms multiple rows of solid regions arranged at intervals along a first direction. Adjacent solid regions are mirror images of each other. Each solid region group includes multiple equilateral triangle solid regions (23312) arranged at intervals along a second direction. The first direction is perpendicular to the second direction. The equilateral triangles of the solid region groups in the same row are arranged alternately in opposite directions along the second direction. The sides of adjacent equilateral triangles in the same row are parallel.

12. The impeller with the function of self-flowing internal refrigerant due to temperature difference as described in any one of claims 2 to 4, characterized in that, The first plate (2331) is provided with a first protrusion (23311), and the first protrusion (23311) has a connecting groove (233111) formed on the side opposite to the protrusion direction. The cross-section of the first protrusion (23311) is arc-shaped.

13. The impeller with the function of self-flowing internal refrigerant due to temperature difference as described in any one of claims 1 to 4, characterized in that, The impeller is made of a thermally conductive material.

14. A range hood, comprising a main unit (20), said main unit (20) including an air duct (21), characterized in that, The air duct (21) includes a volute (211) and an impeller as described in any one of claims 1 to 13, which has the function of generating internal cooling medium self-flow due to temperature difference, and the impeller is disposed in the volute (211).

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