CN220506849U

CN220506849U - Fume exhaust fan

Info

Publication number: CN220506849U
Application number: CN202322045290.9U
Authority: CN
Inventors: 刘静
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2023-07-31
Filing date: 2023-07-31
Publication date: 2024-02-20
Anticipated expiration: 2033-07-31

Abstract

The utility model relates to a range hood, comprising: the front side wall of the air inlet cavity is provided with an air inlet; the shell is arranged above the air inlet cavity and is in fluid communication with the air inlet cavity, and a smoke blocking part for gathering smoke is formed in a region, which is positioned at the front side of the air inlet cavity, on the bottom wall of the shell; the upper edge of the air inlet on the air inlet cavity is lower than the smoke blocking part of the shell, the air inlet cavity further comprises a guide plate extending obliquely upwards towards the air inlet cavity, the distance between the upper edge of the air inlet and the guide plate is recorded as d, and the value range of d is as follows: 30mm-300mm. The advantages are that: on the basis that the air inlet of the air inlet cavity is reduced to be close to a smoke source as much as possible, the effective ventilation area of the air inlet cavity is ensured, so that the oil smoke can enter the smoke inlet cavity more smoothly, the escape of the oil smoke is reduced, and the oil smoke absorbing effect is improved.

Description

Fume exhaust fan

Technical Field

The utility model relates to the technical field of kitchen appliances, in particular to a range hood.

Background

The kitchen appliance is installed above a kitchen stove, and can quickly pump away waste burnt by the stove and smoke harmful to human bodies in the cooking process, and discharge the smoke out of a room, so that air pollution is reduced. When the range hood is installed, if the range hood is higher from the kitchen range, the use space is increased, the cooking vision is spacious, the operation is convenient, and the oil smoke absorbing effect is poor. If the fume collecting hood is close to the kitchen range, the fume absorbing effect is improved, but the space and the visual field are limited, and the operation is inconvenient.

In order to solve the technical problem, the Chinese patent application with the application number of CN201821783223.X (the authorized bulletin number is CN 209355322U) discloses a hidden range hood, which comprises a fume collecting cabinet and a fume collecting hood, wherein the fume collecting hood is communicated with the fume collecting cabinet, a first lifting mechanism is arranged between the fume collecting hood and the fume collecting cabinet, one end of the first lifting mechanism is connected with the fume collecting hood, the other end of the first lifting mechanism is connected with the fume collecting cabinet, and the first lifting mechanism drives the fume collecting hood to move up and down. The bottom surface of the fume collecting hood is provided with a channel communicated with the inner cavity of the fume collecting hood, the fume collecting hood further comprises a movable fume collecting hood, the front surface of the movable fume collecting hood is provided with a second fume inlet, the movable fume collecting hood is arranged in the channel, the inner cavity of the fume collecting hood is provided with a second lifting mechanism, the second lifting mechanism is connected with the movable fume collecting hood, and the second lifting mechanism drives the movable fume collecting hood to move up and down along the channel to shield or expose the second fume inlet. The fume collecting hood can move up and down relative to the air cabinet under the drive of the first lifting mechanism, the distance between the fume collecting hood and the cooking range is adjusted, the adjustment of the fume sucking area is realized, the volume of the fume extractor is adjusted, the kitchen space occupied by the fume extractor is reduced, the user can operate the fume extractor more flexibly in a kitchen, and the practicability of the fume extractor is improved. On this basis, the movable fume collecting hood arranged in the passage of the fume collecting hood can be driven by the second lifting mechanism to extend out of the fume collecting hood, when the fume amount is large, the movable fume collecting hood extends out of the fume collecting hood to lower the fume sucking area, and the fume can enter the fume collecting hood along the second fume inlet of the movable fume collecting hood, so that the fume sucking effect of the fume exhauster is improved.

However, the above-mentioned range hood has a certain disadvantage, because the movable fume collecting hood is provided with the air inlet on the front side wall, the basic flow condition of the fume is that the fume near the air inlet side is sucked into the range hood in the fume upward transpiration process, the fume far away from the air inlet side is transpired upward and impacted on the fume baffle plate, the fume is diffused to the front and rear sides, and the backward diffused fume climbs down to the air inlet along the supporting plate and is finally sucked into the range hood. Due to the influence of the flow velocity of the air inlet, the forward-diffused oil smoke falls downwards and then is collected into the oil smoke collecting area, and finally is sucked into the smoke machine. The applicant finds that the opening position of the air inlet on the front side wall of the movable smoke collecting cover, in particular, the distance between the air inlet and the smoke baffle plate of the body of the range hood and the arrangement state of the flow guide part at the air inlet of the movable smoke collecting cover have important influence on whether the smoke can be quickly sucked into the smoke collecting cavity or not and the escape problem caused by the fact that the smoke impacts the smoke baffle plate can be effectively reduced, so that reasonable design is needed.

Therefore, the existing range hood needs to be further improved.

Disclosure of Invention

The utility model aims to solve the technical problem of providing a range hood capable of effectively improving the smoking effect and reducing the escape of oil smoke aiming at the current state of the art.

The technical scheme adopted for solving the technical problems is as follows: a range hood, comprising:

the air inlet cavity is internally provided with an air inlet cavity, and the front side wall of the air inlet cavity is provided with an air inlet;

the shell is arranged above the air inlet cavity and is in fluid communication with the air inlet cavity, and a smoke blocking part for gathering smoke is formed in a region, which is positioned at the front side of the air inlet cavity, on the bottom wall of the shell;

the upper edge of the air inlet on the air inlet cavity is lower than the smoke blocking part of the shell, and the air inlet device further comprises a guide plate extending upwards from the lower edge of the air inlet cavity to the air inlet cavity, the distance between the upper edge of the air inlet and the guide plate is recorded as d, and the value range of d is as follows: 30mm-300mm.

The distance d between the upper edge of the air inlet and the guide plate can be understood as the shortest distance between the upper edge of the air inlet and the guide plate.

Under the condition that the power of the fan system is stable and unchanged, the larger the effective ventilation area at the air inlet is, the smaller the flow velocity is; the smaller the effective ventilation area, the greater the flow rate. When the cooking fume is sucked into the fume chamber, the effective ventilation area of the air inlet needs to be ensured not to be too small, otherwise, the range hood cannot suck the fume in the rising time. The effective ventilation area of the air inlet cannot be too large, when the area is too large, the flow speed of the inlet is reduced, the suction force is too small, and the generated oil smoke is sucked into the range hood without enough suction force. In order to better balance the two conditions, under the condition that the length dimension (i.e. dimension in the left-right direction) of the air inlet of the range hood is certain, the distance d between the upper edge of the air inlet and the guide plate is an important factor affecting the effective ventilation area of the air inlet, for this purpose, the d value is further reasonably designed, and specifically, the value range of d is preferably: 70mm-200mm.

On the basis that the air inlet is close to the smoke source in order to enable the air inlet to be detected as underground as possible, the effective ventilation area of the air inlet is guaranteed to be in a proper design range, and then the oil smoke absorbing effect is guaranteed, the vertical distance between the upper edge of the air inlet and the smoke blocking part of the shell is marked as X, and the value range of X is as follows: 5mm-50mm.

In order to achieve better diversion effect at the air inlet, an included angle formed between the diversion plate and the horizontal plane is denoted as alpha, wherein the value range of the alpha is as follows: alpha is more than or equal to 15 degrees and less than 90 degrees. The inclined arrangement mode of the guide plates ensures that the guide plates have a certain shielding effect on the front surface, the attractive appearance of the air inlet can be ensured, the appearance surface of the guide plates is smooth, redundant protruding features are avoided, and the easy cleanliness of the air inlet is ensured.

In order to realize the installation and fixation with the air inlet cavity, the lower edge of the guide plate is provided with a first flanging which extends backwards and is used for being connected with the air inlet cavity.

In order to realize the purpose of smoothly guiding oil on the air inlet cavity, an oil cup is further arranged at the bottom of the main body of the air inlet cavity, the first flange of the guide plate is connected to the bottom wall of the main body of the air inlet cavity, and an oil leakage hole for allowing oil to flow downwards into the oil cup is formed in the bottom wall of the main body of the air inlet cavity, corresponding to the area positioned in the front of the guide plate.

In order to ensure the oil guiding effect, the oil leakage holes are provided with at least two oil leakage holes which are sequentially arranged along the left-right direction.

As another possible improvement, the deflector and the main body of the air inlet cavity are integrally designed. If the guide plate can also be used as a part of the main body of the air inlet cavity to extend, corresponding flanges are additionally arranged on the left side and the right side of the guide plate to be fixed on the air inlet cavity.

In order to avoid the shaking problem of the guide plate under the influence of air flow, a rest on which the upper edge part of the guide plate is placed is also arranged on the rear side wall of the air inlet cavity opposite to the air inlet.

In order to facilitate the disassembly of the guide plate, the upper edge part of the guide plate is connected with the rest in a mutually clamping way.

In order to further improve the convenience of guide plate dismouting, have at least two racks that set gradually along left and right directions on the back lateral wall of air inlet cavity, every have open-top's draw-in groove on the rack, the upper edge part department of guide plate still has the hem towards the lower turn over extension of back, the hem card is gone into in the draw-in groove of each rack.

In order to ensure the overall strength of the air inlet cavity, the air inlet cavity comprises a first side wall, a second side wall and a supporting plate, wherein the first side wall and the second side wall are opposite in the left-right direction, the supporting plate is connected between the front side edge of the first side wall and the front side edge of the second side wall, and the lower edge of the supporting plate is the upper edge of an air inlet of the air inlet cavity. The structural strength of the whole air inlet area is guaranteed by the design of the supporting plate, and under the condition that the supporting plate is not arranged, the air inlet box body is of a structure with an open front end face, and the structural strength of the whole air inlet box body is far from enough. After the supporting plate is added, the air inlet box body encloses a four-end-face closed structure, and the structural strength is greatly improved.

In order to prevent oil from directly flowing down from the upper edge of the air inlet, the inner side of the lower edge of the supporting plate is also provided with an oil guide groove for guiding the oil to the left and the right sides. Oil gathered on the air inlet cavity can fall to the oil guide groove of the supporting plate along the wall surface and drop into the oil cup from the left side and the right side of the supporting plate.

In order to form the oil guide groove, the structure of the air inlet cavity is simplified, and in consideration of cost reduction, the lower edge of the supporting plate is provided with a second flanging which is turned towards the air inlet cavity and extends upwards, and the oil guide groove is defined between the second flanging and the corresponding part of the main body of the supporting plate.

In order to make the volume of the range hood smaller and more compact in the non-use state, and thus the range hood can be better hidden in a kitchen cabinet, the air inlet cavity is connected to the machine shell in a mode of being capable of lifting up and down relative to the machine shell, and has a closing state of moving up into the machine shell to close the air inlet and an opening state of moving down to expose out of the machine shell to open the air inlet.

In order to further ensure the aesthetic property of the range hood in a non-use state, the bottom wall of the air inlet cavity is basically flush with the bottom wall of the shell when the air inlet cavity is in a closed state.

The shell comprises a first shell and a second shell which are connected together in a relatively lifting mode, the inner cavity of the first shell is in fluid communication with the inner cavity of the second shell, and the air inlet cavity can be connected to the second shell in a vertically lifting mode relative to the second shell. Above-mentioned structural design for the whole of range hood forms two-stage telescopic lift structure, and second casing and air inlet cavity can rise in place simultaneously when rising, reaches the assigned position, reaches and beats the effect of inlaying with the cupboard, and when descending, more that rely on the big stroke of two-stage driven to make the air intake of air inlet cavity visit downwards, promotes the oil absorption effect.

The fan system of the range hood can be arranged in the shell or outside the shell (such as an external fan arranged at a kitchen suspended ceiling), and preferably further comprises a fan system which is arranged in the first shell. In general, the first housing may be fixed as a fan frame on a wall of a kitchen, and the fan system is fixed with respect to the first housing, so that the weight of the second housing is reduced, and the lifting process of the second housing is more stable and operable.

Compared with the prior art, the utility model has the advantages that: because the height position of the upper edge of the air inlet on the air inlet cavity is lower than the height position of the smoke blocking part of the shell, and the distance between the upper edge of the air inlet and the obliquely arranged guide plate is set within the range of 30mm-300mm, the air inlet of the air inlet cavity is enabled to be reduced to the basis of being close to a smoke source as much as possible, the effective ventilation area of the air inlet cavity is ensured, rising smoke can be smoothly introduced into the smoke inlet cavity, escape of the smoke is reduced, and the smoke absorbing effect is improved. On the other hand, the height of the air inlet is reduced due to the structural design, so that the oil smoke is sucked when still having a certain distance with the bottom of the shell, the condensed oil generated by the bottom of the shell due to contact with the oil smoke is reduced, and the use experience of a user is improved.

Drawings

Fig. 1 is a schematic perspective view of a range hood according to an embodiment of the present utility model (in a retracted state);

fig. 2 is a schematic view illustrating a perspective view of a range hood according to another embodiment of the present utility model;

fig. 3 is a vertical sectional view of the range hood according to the embodiment of the present utility model, taken along the front-rear direction;

fig. 4 is a schematic perspective view of a range hood according to an embodiment of the present utility model (in an extended state);

fig. 5 is a vertical sectional view of the range hood shown in fig. 4 taken in a front-rear direction;

FIG. 6 is an enlarged view of a portion of the cross-sectional view shown in FIG. 5;

FIG. 7 is a schematic perspective view of an air intake cavity;

fig. 8 is a vertical cross-sectional perspective view of the air intake cavity taken in a front-to-rear direction.

Detailed Description

The utility model is described in further detail below with reference to the embodiments of the drawings.

In the description and claims of the present utility model, terms indicating directions, such as "front", "rear", "upper", "lower", "left", "right", "side", "top", "bottom", etc., are used to describe various example structural parts and elements of the present utility model, but these terms are used herein for convenience of description only and are determined based on the example orientations shown in the drawings. Because the disclosed embodiments of the utility model may be arranged in a variety of orientations, the directional terminology is used for purposes of illustration and is in no way limiting, such as "upper" and "lower" are not necessarily limited to being in a direction opposite or coincident with the direction of gravity.

Referring to fig. 1-8, a preferred embodiment of the range hood of the present embodiment is shown, the range hood comprising a housing, a fan system 40 disposed within the housing, and a lifting device 20.

Referring to fig. 1 and 4, the machine body includes an air inlet cavity 13 connected to the machine shell, and the machine shell includes a first shell 11 and a second shell 12. The inner cavity of the first shell 11, the inner cavity of the second shell 12 and the inner cavity of the air inlet cavity 13 are communicated. The first shell 11, the second shell 12 and the air inlet cavity 13 realize relative lifting movement through the lifting device 20, so that the air inlet cavity 13 can be ensured to be detected down to a position closer to a smoke source, and the smoke absorbing effect is improved. The first housing 11 is fixed relative to the wall surface, and the fan system 40 is arranged in the first housing 11 and is used for providing negative pressure for exhausting oil smoke. The first shell 11 and the second shell 12 are sleeved with each other in an up-down relative mode, and the air inlet cavity 13 and the second shell 12 are sleeved with each other in an up-down relative mode. The left-right dimension of the first housing 11 is smaller than the left-right dimension of the second housing 12, and the front-rear dimension of the first housing 11 substantially coincides with the front-rear dimension of the second housing 12 (specifically, the front-rear dimension of the first housing 11 is slightly smaller than the front-rear dimension of the second housing 12). The left-right dimension of the air intake cavity 13 is substantially identical to the left-right dimension of the second housing 12 (specifically, the left-right dimension of the air intake cavity 13 is slightly smaller than the left-right dimension of the second housing 12), and the front-rear dimension of the air intake cavity 13 is smaller than the front-rear dimension of the second housing 12, which is substantially about one third of the front-rear dimension of the second housing 12. More specifically, the bottom of the first housing 11 has a first opening 111, the top of the second housing 12 has a second opening 121, and the bottom rear side of the second housing 12 has a third opening 122. The first opening 111 of the first housing 11 is opposite to the second opening of the second housing 12 in the up-down direction. The first housing 11 can extend downwardly into the second housing 12 through the second opening 121 into and out of the second housing 12, wherein the second opening 121 of the second housing 12 is shaped and sized to substantially conform to the cross-sectional shape and size (cross-section in the horizontal direction) of the first housing 11. The air intake cavity 13 can extend into the second housing 12 through a third opening 122 at the bottom of the second housing 12 in the up-down direction, wherein the shape and size of the third opening 122 are substantially identical to the shape and size of the cross section (cross section in the horizontal direction) of the air intake cavity 13. Since the third opening 122 is provided at the bottom rear side of the second housing 12, the air intake chamber 13 is also provided at a rear side with respect to the second housing 12, and thus, a portion of the bottom area of the second housing 12 located at the air intake chamber 13 forms a smoke blocking portion 123 for collecting smoke. An air inlet 131 for external flue gas to enter is formed in the front side wall of the air inlet cavity 13, and specifically, the air inlet 131 extends in the left-right direction. The bottom of the main body of the air inlet cavity 13 is provided with an oil cup 132 extending leftwards and rightwards for containing the oil flowing down on the main body of the air inlet cavity 13.

As shown in fig. 5, in order to better attach to the wall and to ensure the overall fixing stability of the range hood, the rear side wall of the air intake cavity 13 and the rear side wall of the first housing 11 are both disposed close to the rear side wall of the second housing 12, that is, the rear side wall of the air intake cavity 13, the rear side wall of the first housing 11 and the rear side wall of the second housing 12 are substantially located in the same vertical extending direction.

Referring to fig. 1 and 4, when the range hood is folded (typically, when the range hood is turned off), the air inlet cavity 13 moves from bottom to top, enters the inner cavity of the second casing 12 through the third opening 122 at the bottom of the second casing 12, and after moving in place, the air inlet 131 on the air inlet cavity 13 is covered by the second casing 12 to be closed, and the bottom of the air inlet cavity 13 (i.e., the bottom wall of the oil cup 132) is substantially flush with the bottom wall of the second casing 12. Similarly, during the upward movement of the second housing 12 relative to the first housing 11, the first housing 11 enters the inner cavity of the second housing 12 from the second opening 121 at the top of the second housing 12, and after the movement is in place, most (lower part) of the first housing 11 is accommodated in the second housing 12, and the upper part is exposed relative to the second housing 12, so that the fixing frame is hung on the wall surface. After the second shell 12 and the air inlet cavity 13 rise in place at the same time and reach the designated position, the effect of being embedded with the bottom surface of the cabinet can be achieved, namely, the whole cabinet can be hidden in the cabinet, and the whole aesthetic property is improved. When the range hood is unfolded, the second housing 12 and the air inlet cavity 13 arranged on the second housing 12 move downwards relative to the first housing 11, and simultaneously, the air inlet cavity 13 moves downwards relative to the second housing 12, exposing the bottom of the second housing 12 and exposing the air inlet 131. After the second housing 12 and the air inlet cavity 13 move in place, the height position of the second housing 12 is lower than that of the first housing 11, and the height position of the air inlet cavity 13 is lower than that of the second housing 12. The range hood can effectively improve the oil fume suction effect because the range hood depends on the large stroke of two-stage driving to enable the air inlet 131 of the air inlet cavity 13 to go down more.

As shown in fig. 3 and 5, in order to achieve lifting of the second housing 12 relative to the first housing 11 and lifting of the air intake cavity 13 relative to the second housing 12, the lifting device 20 of this embodiment may be implemented by two independent lifting mechanisms (such as electric push rods), or may be implemented by a lifting mechanism with two-stage telescopic function in the prior art, where the lifting mechanism generally has two power output ends, one power output end 21 may be connected to the second housing 12 to drive the second housing 12 to lift relative to the first housing 11, and the other power output end 22 may be connected to the air intake cavity 13 to drive the air intake cavity 13 to lift relative to the second housing 12. There is a movement gap between the first housing 11 and the second housing 12, where a sealing member 30 is provided, wherein the sealing member 30 may be fixed to the first housing 11, and the sealing member 30 is in sealing contact with the second housing 12 during the up-and-down movement with the first housing 11.

Referring to fig. 8, the air intake chamber 13 in this embodiment includes first and second side walls 1301 and 1302 opposite in the left-right direction, a third side wall 1303 located at the rear side, a fourth side wall 1304 located at the bottom, and a support plate 134 connected between the front sides of the first and second side walls 1301 and 1302. The open area between the support plate 134 and the fourth sidewall 1304 at the bottom of the air intake cavity 13 forms the air intake 131 of the air intake cavity 13, and the air intake 131 extends in the left-right direction. The structural strength of the whole air inlet 131 area is ensured by the design of the supporting plate 134, and under the condition that the supporting plate 134 is not provided, the air inlet 131 box body is of a structure with an open front end face, and the structural strength of the whole air inlet 131 box body is far from sufficient. After the supporting plate 134 is added, the air inlet 131 box body encloses a four-end-face closed structure, and the structural strength is greatly improved.

The inside of the air intake cavity 13 is provided with a deflector 133 inclined upward from front to back at a lower edge adjacent to the air intake 131 (i.e., at a fourth side wall 1304 at the bottom of the air intake cavity 13), and in order to achieve a better flow guiding effect at the air intake 131, an included angle formed between the deflector 133 and a horizontal plane is denoted as α, where a has a value ranging from: alpha is more than or equal to 15 degrees and less than 90 degrees. The above-mentioned slope arrangement mode of guide plate 133 for guide plate 133 has certain shielding effect in the front, can guarantee the aesthetic measure of air intake 131 department, and this guide plate 133 outward appearance face is comparatively smooth, does not have unnecessary outstanding characteristics, has guaranteed the easy cleanliness of air intake 131 department.

The lower edge of the baffle 133 of this embodiment has a first flange 1331 extending horizontally and backward, and the first flange 1331 may be connected to the fourth side wall 1304 of the air intake cavity 13 by a screw. The upper edge of the deflector 133 extends to a third side wall 1303 of the rear side of the air intake chamber 13. In order to avoid the shaking problem of the baffle 133 under the influence of the air flow, a corresponding rest stand 14 is provided at the third side wall 1303 of the air inlet cavity 13, and when the baffle 133 is installed, the upper edge portion of the baffle 133 may be rested on the rest stand 14. More specifically, two or more placing frames 14 may be sequentially disposed on the rear sidewall of the air intake cavity 13 along the left-right direction, where each placing frame 14 has a clamping slot 141 with an open top, a hook 142 protruding forward is disposed at the open top of the clamping slot 141, correspondingly, a folded edge 1332 extending towards the lower rear is further disposed at the upper edge of the baffle 133, and a bayonet 13320 is disposed on the folded edge 1332. In the process of inserting the folded edge 1332 of the baffle 133 into the clamping groove 141 of the shelf 14, the clamping hook 142 on the shelf 14 can be correspondingly clamped into the bayonet 13320 of the folded edge 1332, so that the baffle 133 can be limited to move upwards, and firm fixing of the baffle 133 can be realized.

With continued reference to fig. 8, the bottom of the main body of the air intake cavity 13 (i.e., on the fourth side wall 1304) is further provided with oil leakage holes 130, where the oil leakage holes 130 have a row, and are specifically arranged in sequence along the left-right direction. The above-mentioned opening position of the oil drain hole 130 on the fourth side wall 1304 corresponds to the area located at the front of the deflector 133, and is preferably opposite to the support plate 134 of the air intake chamber 13 in the up-down direction.

The lower edge of the support plate 134 of the air intake cavity 13 has a second flange 1341 turned inwardly toward the air intake cavity 13 and extending upwardly, and an oil guide groove 1340 extending in the left-right direction is defined between the second flange 1341 and a corresponding portion of the main body of the support plate 134. The oil collected on the air inlet cavity 13 can fall to the oil guide groove 1340 of the supporting plate 134 along the wall surface, flow to the left and right ends of the oil guide groove 1340, and then drop into the oil cup 132 from the left and right sides of the supporting plate 134.

As shown in fig. 6, in the state that the air inlet chamber is moved down to the low position, the upper edge of the air inlet 131 (i.e., the lower edge of the support plate 134) is located at a height position lower than that of the smoke blocking portion 123 of the housing. Specifically, the vertical distance between the upper edge of the air inlet 131 and the smoke blocking portion 123 of the casing is denoted as X, where the range of the value of X is: the optimal value of 5mm-50mm is 18mm, so design can make the air intake 131 of air intake cavity 13 visit as underground on the basis near the smoke source as far as possible, guarantee that the effective ventilation area of air intake 131 is in suitable design scope, and then guarantee the oil smoke absorbing effect. On the other hand, the supporting plate 134 can reduce the height of the air inlet 131, so that the oil smoke is sucked when a certain distance is still kept between the bottom of the second housing 12, on one hand, the condensed oil generated by contacting the oil smoke at the bottom of the second housing 12 can be reduced, and on the other hand, the oil smoke leakage can be reduced.

The distance between the upper edge of the air inlet 131 and the baffle 133 in this embodiment is denoted as d, where the range of d is as follows: 30mm-300mm. Currently on the marketThe left and right size range of the double-stove gas stove: 700mm-900mm, the left-right dimension of the range hood is slightly larger than the dimension of the gas stove, and correspondingly, the left-right dimension (length) of the air inlet 131 is basically consistent, and the left-right dimension (length) of the air inlet 131 can be marked as L. Under the condition that the power of the fan system 40 is stable, the larger the effective ventilation area at the air inlet 131 is, the smaller the flow speed is; the smaller the effective ventilation area, the greater the flow rate. The need to suck all the oil smoke generated during the cooking process into the smoke chamber requires to ensure that the effective ventilation area of the air inlet 131 cannot be too small, otherwise, the range hood cannot suck all the oil smoke in during the rising time. The effective ventilation area of the air inlet 131 cannot be too large, and when the area is too large, the inlet flow speed becomes small, the suction force is too small, and the generated oil smoke is not sucked into the range hood by the suction force. In order to better balance the above two situations, in the case that the length dimension (i.e. the dimension in the left-right direction) of the air inlet 131 of the range hood is fixed, the distance d between the upper edge of the air inlet 131 and the baffle 133 is an important factor affecting the effective ventilation area of the air inlet 131, and in addition, the effective ventilation area of the air inlet 131 of the smoke inlet chamber of the embodiment is denoted as S, where s=l×d, in order to adapt to the existing fan system 40 and ensure the smoke absorbing effect, the preferred range of the effective ventilation area S is as follows: 30000mm ² ＜S＜100000mm ² On the basis, d is further reasonably designed, and the value range of d is preferably: 70mm-200mm.

Because the height position of the upper edge of the air inlet 131 on the air inlet cavity 13 is lower than the height position of the smoke blocking part 123 of the shell, and the distance between the upper edge of the air inlet 131 and the obliquely arranged guide plate 133 is set within the range of 30mm-300mm, the effective ventilation area of the air inlet 131 of the air inlet cavity 13 is ensured on the basis that the air inlet 131 of the air inlet cavity 13 is reduced as much as possible and is close to a smoke source, rising smoke can enter the smoke inlet cavity more smoothly, escape of the smoke is reduced, and the smoke absorbing effect is improved.

Other embodiments can be obtained by replacing and improving the related technical features on the basis of the above embodiments. For example, the deflector 133 and the main body of the air inlet cavity 13 may be integrally designed. For example, the baffle 133 may also be extended as a part of the main body of the air inlet cavity 13, and corresponding flanges are added on the left and right sides of the baffle 133 to fix the baffle to the air inlet cavity 13.

The term "fluid communication" as used herein refers to a spatial positional relationship between two components or parts (hereinafter collectively referred to as a first part and a second part, respectively), that is, a fluid (gas, liquid, or a mixture of both) can flow along a flow path from the first part to the second part or/and be transported to the second part, or the first part and the second part may be directly communicated with each other, or the first part and the second part may be indirectly communicated with each other through at least one third party, and the third party may be a fluid channel such as a pipe, a channel, a conduit, a flow guiding member, a hole, a groove, or the like, or a chamber allowing the fluid to flow through, or a combination thereof.

Claims

1. A range hood, comprising:

an air inlet cavity (13) is defined in the air inlet cavity, and an air inlet (131) is formed in the front side wall of the air inlet cavity (13);

a casing which is arranged above the air inlet cavity (13) and is in fluid communication with the air inlet cavity, wherein a smoke blocking part (123) for gathering smoke is formed in a region of the bottom wall of the casing, which is positioned at the front side of the air inlet cavity (13);

the method is characterized in that: the upper edge of the air inlet (131) on the air inlet cavity (13) is lower than the smoke blocking part (123) of the shell, and the air inlet device further comprises a guide plate (133) extending upwards in an inclined way from the lower edge of the air inlet (131) of the air inlet cavity (13) towards the air inlet cavity (13), the distance between the upper edge of the air inlet (131) and the guide plate (133) is recorded as d, and the value range of d is as follows: 30mm-300mm.

2. The range hood of claim 1, wherein: d has the following value range: 70mm-200mm.

3. The range hood of claim 1, wherein: the vertical distance between the upper edge of the air inlet (131) and the smoke blocking part (123) of the shell is denoted as X, wherein the value range of X is as follows: 5mm-50mm.

4. The range hood of claim 1, wherein: the included angle formed between the guide plate (133) and the horizontal plane is denoted as alpha, wherein the value range of alpha is as follows: alpha is more than or equal to 15 degrees and less than 90 degrees.

5. The range hood of claim 1, wherein: the lower edge of the guide plate (133) is provided with a first flanging (1331) which extends backwards and is used for being connected with the air inlet cavity (13).

6. The range hood of claim 5, wherein: the bottom of the main body of the air inlet cavity (13) is also provided with an oil cup (132), a first flanging (1331) of the guide plate (133) is connected to the bottom wall of the main body of the air inlet cavity (13), and an oil leakage hole (130) for oil to flow downwards into the oil cup (132) is formed in the bottom wall of the main body of the air inlet cavity (13) in a region corresponding to the front part of the guide plate (133).

7. The range hood of claim 6, wherein: the oil leakage hole (130) has at least two arranged in order in the left-right direction.

8. The range hood of claim 1, wherein: the guide plate (133) and the main body of the air inlet cavity (13) are integrally designed.

9. The range hood of claim 1, wherein: and a rest (14) on which the upper edge part of the guide plate (133) is placed is also arranged on the rear side wall, opposite to the air inlet (131), of the air inlet cavity (13).

10. The range hood of claim 9, wherein: the upper edge part of the guide plate (133) is connected with the rest (14) in a mutually clamping way.

11. The range hood of claim 10, wherein: the rear side wall of the air inlet cavity (13) is provided with at least two shelves (14) which are sequentially arranged along the left-right direction, each shelf (14) is provided with a clamping groove (141) with an opening at the top, the upper edge part of the guide plate (133) is also provided with a folded edge (1332) which is folded and extended towards the rear lower part, and the folded edge (1332) is clamped into the clamping groove (141) of each shelf (14).

12. The range hood of claim 1, wherein: the air inlet cavity (13) comprises a first side wall (1301) and a second side wall (1302) which are opposite in the left-right direction, and a supporting plate (134) connected between the front side edge of the first side wall (1301) and the front side edge of the second side wall (1302), wherein the lower edge of the supporting plate (134) is the upper edge of an air inlet (131) of the air inlet cavity (13).

13. The range hood of claim 12, wherein: the inner side of the lower edge of the supporting plate (134) is also provided with an oil guiding groove (1340) for guiding oil to the left and right sides.

14. The range hood of claim 13, wherein: the lower edge of the supporting plate (134) is provided with a second flanging (1341) which is turned inwards towards the air inlet cavity (13) and extends upwards, and the second flanging (1341) and the corresponding part of the main body of the supporting plate (134) define an oil guide groove (1340).

15. The range hood according to any one of claims 1 to 11, wherein: the air inlet cavity (13) is connected to the machine shell in a mode of being capable of lifting up and down relative to the machine shell, and has a closing state of moving up into the machine shell to close the air inlet (131) and an opening state of moving down to expose out of the machine shell to open the air inlet (131).

16. The range hood of claim 15, wherein: when the air inlet cavity (13) is in a closed state, the bottom wall of the air inlet cavity (13) is flush with the bottom wall of the shell.

17. The range hood of claim 15, wherein: the shell comprises a first shell (11) and a second shell (12) which are sleeved outside and connected together in a relatively lifting mode, the inner cavity of the first shell (11) is in fluid communication with the inner cavity of the second shell (12), and the air inlet cavity (13) can be connected to the second shell (12) in a vertically lifting mode relative to the second shell (12).

18. The range hood of claim 17, wherein: the fan system (40) is arranged in the first shell (11).