CN108592129B - Internal circulation type fume exhaust fan - Google Patents

Abstract

The invention discloses an internal circulation type range hood, which comprises: the shell is internally provided with a filter cavity, and the filter cavity is provided with an air inlet and an air outlet which are communicated with the indoor environment; the wind wheel assembly is rotatably arranged in the filter cavity to drive air to flow from the air inlet to the air outlet; the filter screen assembly is arranged in the filter cavity and comprises a first filter piece and a second filter piece, air entering the filter cavity is sequentially filtered by the first filter piece and the second filter piece and then discharged through the air outlet, the first filter piece is used for filtering oil smoke and water vapor in the air, and the second filter piece is used for filtering PM particulate matters and/or formaldehyde in the air. According to the range hood disclosed by the invention, not only can the oil smoke and water vapor in the air be filtered, but also PM particles and formaldehyde in the air can be filtered, and the air purifying effect is good.

Description

Internal circulation type fume exhaust fan

Technical Field

The invention relates to the technical field of range hoods, in particular to an internal circulation type range hood.

Background

The range hood in the related art can only generally realize the filtration of oil smoke and water vapor in the air, and cannot further filter the air, such as PM particles and formaldehyde in the air.

Disclosure of Invention

The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, an object of the present invention is to provide an internal circulation type range hood, which can filter not only oil smoke and water vapor in air, but also PM particles and formaldehyde in air, and has a good air purifying effect.

According to an embodiment of the invention, an internal circulation type range hood comprises: the filter chamber is defined in the shell and is provided with an air inlet and an air outlet which are communicated with the indoor environment; the wind wheel assembly is rotatably arranged in the filter cavity to drive air to flow from the air inlet to the air outlet; the filter screen assembly is arranged in the filter cavity and comprises a first filter piece and a second filter piece, air entering the filter cavity sequentially passes through the first filter piece and the second filter piece and is discharged through the air outlet after being filtered, wherein the first filter piece is used for filtering oil smoke and water vapor in the air, and the second filter piece is used for filtering PM particulate matters and/or formaldehyde in the air.

According to the internal circulation type range hood provided by the embodiment of the invention, not only can the oil smoke and water vapor in the air be filtered, but also PM particles and formaldehyde in the air can be filtered, and the air purifying effect is good.

In addition, the internal circulation type range hood according to the embodiment of the invention can also have the following additional technical characteristics:

according to one embodiment of the invention, the first filter element is a metal screen or a PP screen.

According to one embodiment of the invention, the second filter is an activated carbon filter screen or a HEPA high efficiency filter screen.

According to one embodiment of the invention, the air inlet and/or the air outlet are/is formed as an annular structure extending circumferentially along the housing, and when the air inlet is formed as an annular structure extending circumferentially around the housing, the first filter element and the second filter element are each formed as an annular structure opposite the air inlet, the second filter element being provided within the first filter element.

According to one embodiment of the invention, the screen assembly is removably disposed within the filter cavity.

According to one embodiment of the invention, the first filter element is detachably connected to the second filter element.

According to one embodiment of the invention, an ultraviolet lamp is further arranged in the filter cavity.

According to one embodiment of the invention, the ultraviolet lamp is arranged adjacent to the air inlet, the ultraviolet lamp comprises a lamp panel and ultraviolet lamp beads arranged on the lamp panel, and the ultraviolet lamp beads are arranged towards the air inlet.

According to one embodiment of the invention, the ultraviolet lamp is arranged adjacent to the air outlet, the ultraviolet lamp comprises a lamp panel and ultraviolet lamp beads arranged on the lamp panel, and the ultraviolet lamp beads are arranged towards the air outlet.

According to one embodiment of the invention, the ultraviolet lamp is a UVC-LED lamp.

According to one embodiment of the invention, a flow guiding component is arranged between the wind wheel component and the air outlet so as to guide the air filtered by the filter screen component towards the air outlet.

According to one embodiment of the invention, the air guide assembly comprises an upper air channel plate and a lower air channel plate which are oppositely arranged along the up-down direction, an air guide channel is defined between the upper air channel plate and the lower air channel plate, the air guide channel comprises an inlet arranged towards the wind wheel assembly and an outlet communicated with the air outlet, and the cross section area of the air guide channel is reduced along the direction from the inlet to the outlet.

According to one embodiment of the invention, the wind wheel assembly comprises a wind wheel and a motor for driving the wind wheel to rotate, at least one part of the upper air duct plate forms a cambered surface structure protruding downwards, and the lowest point of the cambered surface structure is lower than the highest point of the wind wheel.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

Fig. 1 is a schematic view of an internal circulation type range hood according to an embodiment of the present invention;

fig. 2 is a partial structural sectional view of an internal circulation type range hood according to an embodiment of the present invention;

Fig. 3 is a partial structural sectional view of an internal circulation type range hood according to another embodiment of the present invention;

FIG. 4 is a schematic view of a screen assembly according to an embodiment of the invention;

FIG. 5 is an exploded view of the screen assembly shown in FIG. 4;

Fig. 6 is a schematic view of an ultraviolet lamp according to an embodiment of the invention.

Reference numerals:

A smoke machine 100; a filter chamber 101; an air inlet 102; an air outlet 103; a sling 104;

A housing 1; an upper housing assembly 11; an upper housing 111; an air inlet grille 112;

a lower housing assembly 12; a lower housing 121; decorative panel 122;

A wind wheel assembly 2; a wind wheel 21; a motor 22;

a screen assembly 3; a first filter 31; a second filter 32;

an ultraviolet lamp 4; a lamp panel 41; ultraviolet UVC-LED lamp beads 42;

A lighting assembly 5;

An upper mounting cover 61; a lower mounting cover 62; a mounting cavity 601;

an upper duct plate 71; a lower duct plate 72; and a diversion tunnel 701.

Detailed Description

Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.

The present application has been made based on the findings and knowledge of the inventors regarding the following facts and problems:

The range hood in the related art can only generally realize the filtration of oil smoke and water vapor in the air, and cannot further filter the air, such as PM particles and formaldehyde in the air.

In order to further filter the air, an air purifier for removing PM particles and formaldehyde is generally required to be installed in the room, thereby increasing the cost of air purification.

In addition, the prior air purifier mainly takes a desk type, and the use is inconvenient because of the large occupied area of the desk type air purifier.

Further, the range hood 100 may grow bacteria, generate bad smell, develop mold phenomenon, etc. during its long-term use, thereby endangering people's health.

In order to solve at least one of the technical problems in the prior art, the application provides an internal circulation type range hood 100, wherein the internal circulation type range hood 100 not only can filter oil smoke and water vapor in air, but also can filter PM particles and formaldehyde in air, and has good air purifying effect. Therefore, an air purifier for purifying PM particles and formaldehyde does not need to be independently arranged, so that the air purification cost is reduced, and meanwhile, the space for installing the air purifier is saved.

An internal circulation type range hood 100 according to an embodiment of the present invention is described below with reference to fig. 1 to 6.

Referring to fig. 1 to 6, an internal circulation type range hood 100 according to an embodiment of the present invention includes: a housing 1, a rotor assembly 2 and a screen assembly 3.

The filter cavity 101 is defined in the shell 1, the filter cavity 101 is provided with an air inlet 102 and an air outlet 103 which are communicated with the indoor environment, the wind wheel assembly 2 is rotatably arranged in the filter cavity 101 to drive air to flow from the air inlet 102 to the air outlet 103, the filter screen assembly 3 is arranged in the filter cavity 101, the filter screen assembly 3 comprises a first filter piece 31 and a second filter piece 32, air entering the filter cavity 101 is sequentially filtered by the first filter piece 31 and the second filter piece 32 and then is discharged through the air outlet 103, the first filter piece 31 is used for filtering oil smoke and water vapor in the air, and the second filter piece 32 is used for filtering PM particles and/or formaldehyde in the air.

Specifically, the wind wheel assembly 2 rotates in the filter cavity 101 to form negative pressure air draft, air enters the filter cavity 101 from the air inlet 102, and the air is filtered by the first filter element 31 and the second filter element 32 in the filter cavity 101 to form clean air, and then is discharged from the air outlet 103. Specifically, the first filter 31 filters out soot and water vapor in the air, and the second filter 32 filters out PM particles and/or formaldehyde in the air.

From the above, the internal circulation type range hood 100 of the present application sucks indoor air into the filter cavity 101, and after the filter screen assembly 3 filters and removes soot and water vapor, PM particulate matters and/or formaldehyde, etc. in the air, the air is returned to the indoor environment from the air outlet 103, and a smoke pipe communicating with the external environment is not required, so that the kitchen becomes more beautiful and the space layout is more flexible.

According to the internal circulation type range hood 100 provided by the embodiment of the application, not only can the oil smoke and water vapor in the air be filtered, but also PM particles and/or formaldehyde in the air can be filtered, and the air purifying effect is good. Therefore, an air purifier for purifying PM particles and/or formaldehyde does not need to be independently arranged, so that the air purification cost is reduced, and meanwhile, the space for installing the air purifier is saved. The internal circulation type range hood 100 of the present application is particularly suitable for being hung on a mounting base (e.g., a ceiling) by the hanging members 104, thereby saving space.

It should be noted that the internal circulation type range hood 100 of the present application may be installed in a kitchen (e.g., lifted on a ceiling of the kitchen) to purify air in the kitchen, and is particularly suitable for an open kitchen, and the kitchen is more beautiful and flexible in space layout due to the elimination of a smoke tube, and may be used in a closed kitchen. In addition, the internal circulation type range hood 100 of the present application is not limited to being installed in a kitchen, and may be installed in other places where air purification is required.

For example, when a user eats, particularly when eating a hot pot, a lot of oil smoke or steam is generated in the restaurant, so the internal circulation type range hood 100 may be installed in the restaurant (e.g., hung on the ceiling of the restaurant) to purify the air in the restaurant.

In the chessboard room or the mahjong room, second-hand smoke is usually generated, so the internal circulation type range hood 100 can also be installed in the chessboard room or the mahjong room (for example, hung on the ceiling of the chessboard room or the mahjong room) to purify the air in the chessboard room or the mahjong room.

In one embodiment of the present invention, the first filtering member 31 is a metal filter screen or a PP filter screen, and the metal filter screen or the PP filter screen filters the oil smoke and the water vapor in the air, so that the structure is simple, the cost is low, and the filtering effect is good.

Preferably, the first filter 31 is a high-density metal filter screen or a high-density PP filter screen, so that the first filter 31 has better filtering effect on the oil smoke and water vapor.

In one embodiment of the present invention, the second filter 32 is an activated carbon filter or a HEPA high efficiency filter, and when the second filter 32 is an activated carbon filter, the second filter 32 can filter PM particles in air and formaldehyde in air, so that the air purifying effect is good. When the second filter 32 is a HEPA high efficiency filter, it can well remove PM particles in the air, the diameter of the PM particles in the air is generally in the range of 0.1 to 10 microns, the effective removal efficiency of the HEPA high efficiency filter for PM particles of 0.1 to 0.3 microns reaches 99.7%, and the air filtered by the HEPA high efficiency filter can be considered as air which is clean without PM particles.

Advantageously, the second filter 32 comprises an activated carbon filter screen and a HEPA high efficiency filter screen, i.e. when air is filtered through the second filter 32, it is not only filtered through the activated carbon filter screen, but also filtered through the HEPA high efficiency filter screen, i.e. the activated carbon filter screen and the HEPA high efficiency filter screen jointly filter the air, thereby making the purifying effect of the air better.

In one embodiment of the invention, the air inlet 102 and/or the air outlet 103 are formed as a ring-shaped structure extending along the circumference of the housing 1, i.e. in some examples only the air inlet 102 is formed as a ring-shaped structure extending along the circumference of the housing 1; in some examples, only the air outlets 103 form an annular structure extending circumferentially along the housing 1; in some examples, referring to fig. 1-5, the air inlet 102 and the air outlet 103 each form an annular structure extending circumferentially along the housing 1. Through constructing air intake 102 into the annular structure that extends along casing 1 circumference, so, be favorable to expanding the area of air intake 102 to increase the cage cigarette area, and then can accelerate the circulation rate of air, improve the purification efficiency of air. By constructing the air outlet 103 into an annular structure extending along the circumferential direction of the casing 1, the area of the air outlet 103 is advantageously enlarged, thereby increasing the air outlet quantity, facilitating the circulating flow of air and improving the air purifying efficiency. Advantageously, referring to fig. 2-3, the air inlet 102 is disposed on the side of the housing 1, and the air outlet 103 is disposed above the air inlet 102 (e.g., may be disposed on the top of the housing 1), so that the air flow is further accelerated by the side air inlet and top air outlet of the smoke machine 100.

Further, referring to fig. 1 to 5, when the air inlet 102 is formed in a ring-shaped structure extending circumferentially around the housing 1, the first filter member 31 and the second filter member 32 are each formed in a ring-shaped structure opposite to the air inlet 102, and the second filter member 32 is disposed in the first filter member 31, so that air entering from the air inlet 102 sequentially passes through the first filter member 31 and the second filter member 32 in a radial direction of the air inlet 102, and is then driven to be discharged to the air outlet 103 by the wind wheel assembly 2. Specifically, the first filter 31 primarily filters air to filter out soot and water vapor in the air as the air passes through the first filter 31, and the second filter 32 secondarily filters air to filter out PM particles and/or formaldehyde in the air as the air passes through the second filter 32. The filter screen assembly 3 is simple in structure, convenient to manufacture and high in filtering efficiency.

It will be appreciated that large particulate matters such as water droplets, grease, PM particulate matters and dust in the air are intercepted in the filter screen assembly 3, as the service time increases, more and more particulate matters are accumulated in the filter screen assembly 3, the holes on the filter screen assembly 3 will be blocked by the large particulate matters such as oil smoke, PM particulate matters and dust, or the adsorption material in the filter screen assembly 3 reaches a saturated state, that is, the filtering capability of the filter screen assembly 3 gradually decreases as the service time increases. The screen assembly 3 is required to be cleaned or replaced periodically, however, the disassembly process of the screen assembly 3 in the related art is complicated, which causes a problem that the screen assembly 3 is difficult to clean and replace.

To solve the above problems, the screen assembly 3 of the present application is detachably provided in the filter chamber 101, thereby facilitating cleaning and replacement of the screen assembly 3.

The first filter element 31 and the second filter element 32 may be separately assembled in the filter cavity 101 and separately disassembled from the filter cavity 101, and of course, the first filter element 31 and the second filter element 32 may be assembled and connected together to form a whole, and the first filter element 31 and the second filter element 32 may be integrally assembled in the filter cavity 101 or the first filter element 31 and the second filter element 32 may be integrally disassembled from the filter cavity 101, so that the assembly and the disassembly are convenient.

Further, the first filter member 31 is detachably connected to the second filter member 32, whereby the first filter member 31 and the second filter member 32 can be separated for separate cleaning or replacement.

Since the range hood 100 may grow bacteria, generate bad smell, and develop a mold phenomenon during its long-term use, etc., it may endanger people's health. In order to solve the problem, the filter chamber 101 of the internal circulation type range hood 100 of the present application is further provided with the ultraviolet lamp 4, the ultraviolet lamp 4 can emit ultraviolet rays, when the ultraviolet rays irradiate odor molecules, the inorganic or organic molecular chain structure of the odor can be changed, so that the odor molecules are degraded and converted into low molecular compounds, thereby eliminating malodorous smell, and microorganisms such as mold and bacteria can lose activity under the irradiation of ultraviolet rays, namely, the ultraviolet lamp 4 has the functions of sterilizing and removing odor, preventing products from breeding bacteria for a long time, and by arranging the ultraviolet lamp 4 in the filter chamber 101, the air entering the filter chamber 101 can be subjected to radiation sterilization and purification, thereby avoiding the bacteria breeding and the mold generation phenomenon in the filter chamber 101, and simultaneously removing the odor in the filter chamber 101, so that the air discharged from the air outlet 103 is cleaner.

In an alternative embodiment of the present invention, referring to fig. 2 and 3, the ultraviolet lamp 4 is disposed adjacent to the air inlet 102, and the ultraviolet lamp 4 includes a lamp panel 41 and ultraviolet lamp beads disposed on the lamp panel 41, the ultraviolet lamp beads being disposed toward the air inlet 102. Therefore, after the indoor air enters the filter cavity 101 from the air inlet 102, the indoor air is subjected to radiation sterilization and purification by the ultraviolet lamp 4 and then is filtered by the filter screen assembly 3, and the sterilization and purification effect is good.

In an alternative embodiment of the present invention, referring to fig. 2 and 3, the ultraviolet lamp 4 is disposed adjacent to the air outlet 103, the ultraviolet lamp 4 includes a lamp panel 41 and ultraviolet lamp beads disposed on the lamp panel 41, and the ultraviolet lamp beads are disposed toward the air outlet 103, so that the air in the filter cavity 101 is sterilized and purified by the radiation of the ultraviolet lamp 4 before being discharged from the air outlet 103, and thus the sterilizing and purifying effects are good.

In a preferred embodiment of the present invention, referring to fig. 2 and 3, the filter cavity 101 is provided with the ultraviolet lamp 4 adjacent to the air inlet 102 and the filter cavity 101 is provided with the air outlet 103, so that when the smoke machine 100 is operated, the wind wheel assembly 2 rotates to form negative pressure exhaust, indoor air enters the filter cavity 101 from the air inlet 102, the air is firstly subjected to radiation sterilization and purification by the ultraviolet lamp 4 adjacent to the air inlet 102 in the filter cavity 101, then is filtered by the filter screen assembly 3 to filter out oil smoke, water vapor, PM particles, formaldehyde and other harmful substances in the air, and then is subjected to radiation sterilization and purification by the ultraviolet lamp 4 adjacent to the air outlet 103, and then flows back to the indoor environment from the air outlet 103, thereby being capable of well avoiding bacterial growth and mold generation phenomena of the air outlet 103 and the air inlet 102, and being well removed of peculiar smell, and being good in air purification effect of the smoke machine 100.

Advantageously, the ultraviolet lamp 4 is a UVC-LED lamp, which can generate UVC ultraviolet rays of a stable wave band, and has good performance of sterilizing, removing peculiar smell and preventing bacteria from breeding, thereby making the air purifying effect of the cigarette making machine 100 better. In addition, it is harmless to the environment and has little corrosiveness to plastic products. Of course, the present application is not limited to this, and the ultraviolet lamp 4 may be an ultraviolet mercury lamp.

In a specific embodiment of the present invention, referring to fig. 6, the ultraviolet lamp 4 is a UVC-LED lamp, the ultraviolet lamp 4 includes a lamp panel 41 and ultraviolet UVC-LED beads 42 disposed on the lamp panel 41, the wavelength of the ultraviolet UVC-LED beads 42 is 265nm to 275nm, the radiation angle of the ultraviolet UVC-LED beads 42 is 120 °, and the number and arrangement of the ultraviolet UVC-LED beads 42 are determined according to the shape and area of the air inlet 102 or the air outlet 103, and advantageously, the radiation range of the ultraviolet lamp 4 covers the air inlet 102 or the air outlet 103, so that the sterilizing and purifying effects of the smoke machine 100 on air are better. Advantageously, the distance between the ultraviolet UVC-LED lamp beads 42 and the air outlet 103 or the air inlet 102 is in the range of 10 mm-100 mm, and the sterilization effect is better.

Further, in the example shown in fig. 1-3, the air inlet 102 and the air outlet 103 are both formed into an annular structure extending circumferentially around the housing 1, at this time, the lamp panel 41 may be formed into an annular plate opposite to the air inlet 102 or the air outlet 103, the uv-UVC-LED lamp beads 42 include a plurality of uv-UVC-LED lamp beads 42, and the plurality of uv-UVC-LED lamp beads 42 are circumferentially spaced on the lamp panel 41, so that the radiation range of the uv lamp 4 covers the air inlet 102 or the air outlet 103, and the sterilization and purification are good.

Of course, the lamp panels 41 may also be formed into a cambered surface plate shape or a planar plate shape, the lamp panels 41 include a plurality of lamp panels arranged at intervals along the circumferential direction, and at least one (three as shown in fig. 6) ultraviolet UVC-LED lamp bead 42 is arranged on each lamp panel 41, so that the radiation range of the ultraviolet lamp 4 covers the air inlet 102 or the air outlet 103, and the sterilization and purification are good.

In one embodiment of the present invention, referring to fig. 2-3, a flow guiding assembly is provided between the wind wheel assembly 2 and the air outlet 103 to guide the air filtered by the filter screen assembly 3 toward the air outlet 103. Thereby facilitating the acceleration of the flow of air and improving the purification efficiency of the air.

Further, referring to fig. 2-3, the air guiding assembly includes an upper air channel plate 71 and a lower air channel plate 72 which are disposed opposite to each other in the up-down direction, an air guiding channel 701 is defined between the upper air channel plate 71 and the lower air channel plate 72, the air guiding channel 701 includes an inlet disposed toward the wind wheel assembly 2 and an outlet communicating with the air outlet 103, the cross-sectional area of the air guiding channel 701 is reduced in the direction from the inlet toward the outlet, the air guiding assembly is simple in structure, and the air guiding effect is good. Preferably, referring to fig. 2-3, the ultraviolet lamp 4 is arranged in the diversion air duct 701, so that the air from the wind wheel 21 is discharged from the air outlet 103 after being sterilized and purified by the ultraviolet lamp 4, and the air purifying effect of the smoke machine 100 is better.

Further, referring to fig. 3, the wind wheel assembly 2 includes a wind wheel 21 and a motor 22 driving the wind wheel 21 to rotate, at least a portion of the upper duct plate 71 forms a downwardly protruding cambered surface structure, and the lowest point of the cambered surface structure is lower than the highest point of the wind wheel 21. The air flow is enabled to flow to the air outlet 103 by being stuck to the wall surface of the upper air duct plate 71 after exiting from the wind wheel 21, and the flow guiding effect is better.

Referring to fig. 2 to 3, the lower duct plate 72 is formed in an arc-shaped structure to guide the air flow coming out of the wind wheel 21 to the air outlet 103, with good flow guiding effect.

In one embodiment of the present invention, referring to fig. 2-3, the smoke ventilator 100 further comprises a lighting assembly 5, and by arranging the lighting assembly 5, not only has the functions of removing oil smoke and purifying air, but also has a lighting function, the smoke ventilator 100 and the indoor lamp are integrated into a whole, and the smoke ventilator 100 can be used as a general indoor lighting lamp, so that the indoor lighting lamp is not required to be separately installed.

Further, referring to fig. 2-3, the air inlet 102 is disposed at a side of the housing 1, the air outlet 103 is disposed above the air inlet 102 (e.g. may be disposed at a top of the housing 1), and the lighting assembly 5 is disposed at a bottom of the housing 1, so that a size and a mounting position of the lighting assembly 5 may not be limited by the air inlet 102 and the air outlet 103, and the lighting assembly 5 is flexibly mounted. And meanwhile, the problem that the shadow is generated below the smoke machine 100 to influence the sight line due to the high installation height and large volume of the smoke machine 100 can be avoided.

In one embodiment of the present invention, and referring to fig. 2-3, a mounting hood assembly is provided on the extractor 100, the mounting hood assembly defining a mounting cavity 601 therein, and the lighting assembly 5 disposed within the mounting cavity 601. By locating the lighting assembly 5 within the mounting cup assembly, it is possible to avoid oil droplets, dust or water droplets in the air adhering to the lighting assembly 5, affecting the lighting effect of the lighting assembly 5 and damaging the lighting assembly 5.

Further, referring to fig. 2-3, at least a portion of the mounting cap assembly extends into the filter cavity 101 and is configured to: the air filtered by the filter screen assembly 3 is guided toward the wind wheel assembly 2 and then discharged to the air outlet 103 by the driving of the wind wheel assembly 2. Therefore, the overall structure of the smoke machine 100 is more compact, the miniaturization development of the smoke machine 100 is facilitated, and the installation cover component has a flow guiding effect on air in the filter cavity 101, so that the air purifying efficiency of the smoke machine 100 can be improved.

Further, referring to fig. 2 to 3, the air inlet 102 is formed in a ring-shaped structure extending along the circumferential direction of the housing 1, the filter screen assembly 3 is formed in a ring-shaped structure opposite to the air inlet 102, at least a portion of the installation cover assembly is located in the filter screen assembly 3 and opposite to the wind wheel assembly 2, the portion of the installation cover assembly located in the filter screen assembly 3 forms a cambered surface shape protruding toward the wind wheel assembly 2, and air filtered by the filter screen assembly 3 flows toward the wind wheel assembly 2 under the guidance of the cambered outer wall surface of the installation cover assembly. The internal smoke machine 100 of the smoke machine 100 is reasonable and compact in layout, simple in structure of the installation cover component and good in flow guiding effect.

An internal circulation type range hood 100 according to an embodiment of the present invention is described below with reference to fig. 1 to 6.

Referring to fig. 1-6, a smoke machine 100 according to one embodiment of the present invention includes: the device comprises a shell 1, a wind wheel assembly 2, a filter screen assembly 3, an ultraviolet lamp 4, a lighting assembly 5, a mounting cover assembly and a flow guiding assembly.

Wherein, casing 1 includes upper casing subassembly 11 and lower casing subassembly 12, and upper casing subassembly 11 includes the open upper cover shell 111 in bottom, annular center support and annular air inlet grille 112, and lower casing subassembly 12 includes annular lower cover shell 121 and locates the annular decorative board 122 of lower cover shell 121 bottom center department, is equipped with the grid on the decorative board 122. The upper cover shell 111 is arranged above the lower cover shell 121 at intervals, an annular air inlet 102 is defined between the upper cover shell 111 and the lower cover shell 121, an air outlet 103 is also formed into an annular structure, the air outlet 103 is arranged above the air inlet 102, the air outlet 103 is formed on the upper cover shell 111, an air outlet grid can be arranged on the air outlet 103, an air inlet grid 112 is arranged at the air inlet 102 and covers the air inlet 102, the air inlet grid 112 is arranged between the upper cover shell 111 and the lower cover shell 121, the upper cover shell 111, the air inlet grid 112 and the lower cover shell 121 jointly define a filter cavity 101, and a central bracket is arranged between the upper cover shell 111 and the air inlet grid 112.

The wind wheel assembly 2 comprises a wind wheel 21 and a motor 22, the wind wheel 21 is arranged in the filter cavity 101, the motor 22 is connected with the wind wheel 21 to drive the wind wheel 21 to rotate, the wind wheel 21 rotates to form negative pressure draft, and driving air flows from the air inlet 102 to the air outlet 103. The rotation axis of the wind wheel 21 extends vertically, and the wind wheel 21 is a centrifugal wind wheel 21, and the wind wheel assembly 2 is disposed in the upper housing 111 and adjacent to the air outlet 103.

The filter screen assembly 3 is disposed in the filter cavity 101 and between the wind wheel assembly 2 and the air inlet grille 112, and the filter screen assembly 3 is formed in an annular structure opposite to the air inlet 102. The screen assembly 3 includes the first filter element 31 and the second filter element 32 described above.

The mounting cover assembly comprises an upper mounting cover 61 and a lower mounting cover 62, the upper mounting cover 61 is fixed in the filter cavity 101 and is positioned in the filter screen assembly 3, the lower mounting cover 62 is arranged below the upper mounting cover 61 and together with the upper mounting cover 61 defines a mounting cavity 601, the lighting assembly 5 is arranged in the mounting cavity 601, the lower mounting cover 62 is arranged at the center of the annular decorative plate 122 and at least one part of the lower mounting cover 62 extends downwards out of the filter cavity 101, and the lower mounting cover 62 is formed into a lampshade. The upper mounting cover 61 is located below the wind wheel assembly 2, and is formed in a convex arc shape toward the wind wheel assembly 2 to guide the air filtered by the filter screen assembly 3 toward the wind wheel assembly 2, and may also play a certain role in rectifying (avoiding vortex), and the lower mounting cover 62 is formed in a downward convex arc shape.

The upper air duct plate 71 and the lower air duct plate 72 of the air guide assembly define an air guide duct 701 between the upper air duct plate 71 and the lower air duct plate 72, the air guide duct 701 comprises an inlet arranged towards the wind wheel assembly 2 and an outlet communicated with the air outlet 103, and the cross section area of the air guide duct 701 is reduced in the direction from the inlet to the outlet, so that the air guide effect is good. At least a part of the upper air duct plate 71 forms a cambered surface structure protruding downwards, and the lowest point of the cambered surface structure is lower than the highest point of the wind wheel 21, so that air flows out of the wind wheel 21 and then flows to the air outlet 103 against the wall surface of the upper air duct plate 71 to form a diversion effect. The lower duct plate 72 forms an arc-shaped structure to guide the air flow coming out of the wind wheel 21 to the air outlet 103.

The filter cavity 101 is provided with ultraviolet lamps 4 at positions adjacent to the air inlet 102 and the air outlet 103, and the ultraviolet lamps 4 adjacent to the air outlet 103 are arranged in the diversion air duct 701.

The air cleaning process of the smoke machine 100 in the above embodiment is as follows (in which the air flow direction is shown with reference to fig. 3):

The smoke machine 100 is hoisted on the ceiling through the hoisting piece 104, the wind wheel assembly 2 works to form negative pressure air draft, smoke flows towards the smoke machine 100, in the process of smoke rising flow, as the lower mounting cover 62 forms a downward convex cambered surface shape, after the smoke reaches the bottom of the smoke machine 100 from bottom to top, the smoke diffuses to the decorative plate 122 from the periphery along the circular arc surface of the lower mounting cover 62, after preliminary filtration of grid strips on the decorative plate 122, the smoke rises to the periphery of the side surface of the smoke machine 100 along the arc-shaped outer surface of the lower cover 121, and then is pumped into the filter cavity 101 from the air inlet 102 at the side part of the smoke machine 100, and when flowing through the air inlet 102, the smoke is subjected to secondary filtration of the air inlet grid 112.

The flue gas enters the filter cavity 101 after being filtered by the air inlet grille 112, is sterilized and purified by the ultraviolet lamp 4 adjacent to the air inlet 102 in the filter cavity 101, enters the filter screen assembly 3 after being filtered and purified by the filter screen assembly 3, enters the wind wheel assembly 2 under the guidance of the arc-shaped outer surface of the upper mounting cover 61, and then the air coming out of the wind wheel assembly 2 flows to the air outlet 103 under the guidance of the air guide duct 701 and returns to the indoor environment through the air outlet 103. And when the air flows through the diversion air duct 701, the ultraviolet lamp 4 adjacent to the air outlet 103 performs sterilization and purification on the air again.

By the above, according to the smoke machine 100 of the embodiment of the application, various purifying and compounding modes are adopted, so that not only can the oil smoke, the water vapor and harmful substances in the air be removed, but also PM particulate matters and formaldehyde in the air can be removed, and meanwhile, the smoke machine also has the functions of sterilizing, removing peculiar smell and preventing bacteria from breeding, and the air purifying effect is good. In addition, the smoke machine 100 of the present application is hung on the installation base (e.g., ceiling) through the hanging piece 104, which is convenient for the user to use and does not occupy space.

By forming the air inlet 102 and the air outlet 103 into annular structures arranged around the casing 1 of the smoke machine 100, the air inlet 102 is arranged on the side wall of the casing 1, and the air outlet 103 is arranged above the air inlet 102, so that the air purifying efficiency of the smoke machine 100 is improved.

Through setting up lighting assembly 5, make it not only have the effect of getting rid of oil smoke, air-purifying, still have the illumination function, fuse range hood 100 and indoor lamps and lanterns into one body, range hood 100 can be used as general indoor lighting lamp to make indoor no longer install lighting lamp alone, can avoid simultaneously because the installation height of range hood 100 is high, the volume is big and cause the range hood 100 below to produce the shadow and influence the problem of sight. In addition, the lighting assembly 5 is flexible to install and is not affected by the air inlet 102 and the air outlet 103.

In addition, in the working process of the smoke machine 100, the smoke is filtered through the filter screen assembly 3 after being filtered by the grids twice, so that the load of the filter screen assembly 3 can be reduced, the service life of the filter screen assembly 3 is prolonged, and the frequency of replacing and cleaning the filter screen assembly 3 is reduced.

In the description of the present invention, it should be understood that the terms "upper," "lower," "top," "bottom," "inner," "outer," "circumferential," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.

In the description of the present invention, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature.

In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of the present invention, unless explicitly specified and limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, and may also include both the first and second features not being in direct contact but being in contact with each other by way of additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative 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 invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.

Claims (13)

1. An internal circulation range hood, comprising:

The filter chamber is defined in the shell and is provided with an air inlet and an air outlet which are communicated with the indoor environment; the housing includes:

an upper housing assembly comprising an upper casing with an open bottom and an annular air inlet grille;

The lower shell assembly comprises an annular lower housing and an annular decorative plate arranged at the center of the bottom of the lower housing, and grid strips are arranged on the decorative plate;

The upper housing is arranged above the lower housing at intervals, an annular air inlet is defined between the upper housing and the lower housing, and the air inlet is formed into an annular structure;

the air outlet is formed on the upper housing, and the air outlet is formed into an annular structure;

The upper housing, the air inlet grille and the lower housing together define the filter cavity;

The wind wheel assembly is rotatably arranged in the filter cavity to drive air to flow from the air inlet to the air outlet;

The filter screen assembly is arranged in the filter cavity and comprises a first filter piece and a second filter piece, the first filter piece and the second filter piece are respectively formed into annular structures opposite to the air inlet, wherein air entering the filter cavity is discharged through the air outlet after being filtered by the first filter piece and the second filter piece in sequence, the first filter piece is used for filtering oil smoke and water vapor in the air, and the second filter piece is used for filtering PM particles and/or formaldehyde in the air;

a mounting cup assembly, the mounting cup assembly comprising:

The upper mounting cover is fixed in the filter cavity, is positioned in the filter screen assembly, is positioned below the wind wheel assembly, and is formed into a cambered surface shape protruding towards the wind wheel assembly so as to guide the air filtered by the filter screen assembly towards the wind wheel assembly;

The lower mounting cover is arranged below the upper mounting cover, is arranged at the center of the annular decorative plate and forms a cambered surface shape protruding downwards;

the upper mounting cover and the lower mounting cover define a mounting cavity, and the lighting assembly is arranged in the mounting cavity.

2. The internal circulation type range hood according to claim 1, wherein the first filter is a metal screen or a PP screen.

3. The internal circulation range hood of claim 1, wherein the second filter is an activated carbon filter screen or a HEPA high efficiency filter screen.

4. The internal circulation range hood of claim 1, wherein the second filter is disposed within the first filter.

5. The internal circulation range hood of claim 1, wherein the screen assembly is removably disposed within the filter cavity.

6. The internal circulation type range hood according to claim 1, wherein the first filter member is detachably connected to the second filter member.

7. The internal circulation type range hood according to any one of claims 1 to 6, wherein an ultraviolet lamp is further provided in the filter chamber.

8. The internal circulation range hood of claim 7, wherein the ultraviolet lamp is disposed adjacent the air inlet, the ultraviolet lamp comprising a lamp panel and an ultraviolet lamp bead disposed on the lamp panel, the ultraviolet lamp bead disposed toward the air inlet.

9. The internal circulation type range hood according to claim 7, wherein the ultraviolet lamp is arranged adjacent to the air outlet, the ultraviolet lamp comprises a lamp panel and ultraviolet lamp beads arranged on the lamp panel, and the ultraviolet lamp beads are arranged towards the air outlet.

10. The internal circulation type range hood according to claim 7, wherein the ultraviolet lamp is a UVC-LED lamp.

11. The internal circulation type range hood according to claim 1, wherein a flow guiding assembly is provided between the wind wheel assembly and the air outlet to guide the air filtered by the filter assembly toward the air outlet.

12. The internal circulation type range hood according to claim 11, wherein the guide assembly includes an upper duct plate and a lower duct plate disposed opposite to each other in an up-down direction, a guide duct is defined between the upper duct plate and the lower duct plate, the guide duct includes an inlet disposed toward the wind wheel assembly and an outlet communicating with the air outlet, and a sectional area of the guide duct decreases in a direction from the inlet toward the outlet.

13. The internal circulation type range hood according to claim 12, wherein the wind wheel assembly comprises a wind wheel and a motor for driving the wind wheel to rotate, at least a part of the upper air duct plate forms a cambered surface structure protruding downwards, and the lowest point of the cambered surface structure is lower than the highest point of the wind wheel.