Range hood

Abstract

The present invention relates to the technical field of kitchen appliances, and discloses a range hood, comprising a range hood housing, an air duct formed therein, and a fan assembly disposed in the air duct; a particle concentration detection device, disposed on the range hood housing, for detecting the particle concentration of the external environment of the range hood; the particle concentration detection device comprises a shell, and a detection element disposed in the shell; an air inlet and an air outlet are provided on the shell, and a flow channel connecting the air inlet and the air outlet is disposed in the shell; the detection element is used to detect the particle concentration in the flow channel; the air inlet is connected to the air duct through an air induction channel, and the air flow in the flow channel is driven by the fan assembly. In the above-mentioned range hood, the particle concentration detection device configured therein adopts a fanless design inside, and the air flow inside the range hood is driven by the fan assembly inside the range hood through the air induction channel, and no fan is required inside, which reduces maintenance costs and energy consumption; at the same time, the detection device structure is made more compact, and the manufacturing cost is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of kitchen appliances, and in particular to a range hood. Background Art

[0002] With the continuous advancement of smart home technology, the intelligence of kitchen equipment has become an important means to improve the quality of life. The range hood plays a key role in the kitchen, and its performance is directly related to the quality of the kitchen environment and the health of the user. However, the traditional range hoods on the market are still relatively simple and rigid in operation mode, mainly relying on manual operation by the user or control based on preset programs.

[0003] This method has several significant problems: first, it is impossible to adjust the smoking intensity according to the kitchen air quality in real time, which may result in insufficient smoking when the fume concentration is high, or excessive smoking when the fume concentration is low, causing energy waste; second, users are required to intervene frequently to make adjustments, which is not only inconvenient but also affects the user experience of the equipment.

[0004] In order to solve these problems, the industry has begun to explore intelligent control solutions. Among them, it is an important technical direction to monitor the kitchen air quality in real time by installing a particle concentration detection device and automatically adjust the smoking mode accordingly. This type of particle concentration detection device is usually equipped with core components such as optical sensors, fans, and circuit boards. Among them, the fan plays a key role. It drives the external airflow into the detection device, allowing the optical sensor to measure the particle concentration in the air.

[0005] However, this design has some problems: the fan is prone to accumulate dust and oil after long-term operation, and needs regular cleaning and maintenance to keep it running normally. However, cleaning the fan may require disassembling part of the detection device, which increases the complexity and difficulty of maintenance. At the same time, the fan may wear out or fail after long-term operation, which not only affects the accuracy and stability of the detection device, but also may increase the maintenance cost and trouble of the user; in addition, the fan and its related components usually occupy a certain space, making the entire detection device larger in size, which not only increases the production cost, but also limits the flexibility of its application scenarios to a certain extent. Summary of the invention

[0006] Based on the technical problems in the prior art that the fan in the particle concentration detection device configured for the range hood is difficult to clean after long-term operation, the fan is easily damaged, and the detection device is large in size, the present invention provides a range hood, wherein the particle concentration detection device utilizes a fan assembly inside the range hood to drive the internal airflow, and no fan is required inside, thereby reducing maintenance costs. At the same time, the detection device structure is more compact, thereby reducing manufacturing costs.

[0007] The present invention provides a range hood, comprising: A range hood housing, an air duct formed therein, and a fan assembly is arranged in the air duct; A particle concentration detection device, disposed on the range hood housing, for detecting the particle concentration of the external environment of the range hood; The particle concentration detection device comprises a shell and a detection element arranged in the shell; the shell is provided with an air inlet and an air outlet, and a flow channel connecting the air inlet and the air outlet is arranged in the shell; the detection element is used to detect the particle concentration in the flow channel; The air inlet is connected to the air duct through an air induction channel, and the air flow in the flow channel is driven by the fan assembly.

[0008] In some embodiments, the fan assembly includes a volute and an impeller disposed in the volute; the volute is connected to the air inlet of the particle concentration detection device through an air duct, and the air duct forms the air duct channel.

[0009] In some embodiments, an airflow blocking structure is disposed in the flow channel, and along the airflow direction, the airflow blocking structure is located upstream of the detection element.

[0010] In some embodiments, the airflow blocking structure includes a plurality of columnar structures, and the plurality of columnar structures are arranged in an interlaced manner in the flow channel.

[0011] In some embodiments, the airflow blocking structure further comprises an open baffle plate having a plurality of openings, and multiple layers of open baffle plates are sequentially arranged in the flow channel along the airflow direction, and the openings on adjacent open baffle plates are staggered.

[0012] In some embodiments, the aperture baffle is tilted relative to the airflow direction.

[0013] In some embodiments, the airflow blocking structure includes a plurality of staggered baffles arranged in a staggered manner, and the plurality of staggered baffles form an S-shaped circuitous flow channel.

[0014] In some embodiments, the staggered baffles are arranged obliquely relative to the air flow direction.

[0015] In some embodiments, the flow channel has a detection cavity; one side of the detection cavity is provided with a detection element installation cavity; The detection element comprises a light emitter and a light receiver, wherein the light emitter is arranged in the detection element installation cavity and is used to emit light into the detection cavity, and the light receiver is arranged in the detection cavity and is used to receive light scattered by particles; At least one reflective component is disposed in the detection element installation cavity, and the light emitted by the light emitter is reflected into the detection cavity by the reflective component.

[0016] In some embodiments, at least one layer of oil baffle is disposed between the light emitter and the detection cavity, and a small hole for light to pass through is opened on the oil baffle.

[0017] Compared with the prior art, the advantages and positive effects of the present invention are: The particle concentration detection device configured in the above-mentioned range hood adopts a fanless design internally, and uses the fan assembly inside the range hood to drive the internal airflow through the air duct. No fan is required inside, which reduces maintenance costs and energy consumption; at the same time, it makes the detection device structure more compact and reduces manufacturing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0019] Figure 1 This is a schematic diagram of the internal structure of the range hood in the front view of the first embodiment of the present invention; Figure 2 This is a schematic diagram of the internal structure of the range hood in the first embodiment of the present invention as viewed from the side; Figure 3 Schematic diagram of the internal structure of the particle concentration detection device in the first embodiment of the present invention; Figure 4 This is a flow diagram of oil smoke airflow in the second embodiment of the present invention, where the airflow blocking structure is a staggered baffle; Figure 5 for Figure 4 A side cross-sectional view of Figure 6 for Figure 4 Schematic diagram of the opening baffle structure in FIG. Figure 7 In the third embodiment of the present invention, the flow diagram of the oil smoke airflow in which the airflow blocking structure is a staggered baffle; Description of reference numerals: 1- Particle concentration detection device; 100-housing; 111-air inlet; 112-air outlet; 133-oil baffle; 300-detection element; 310-light transmitter; 320-light receiver; 500-airflow blocking structure; 510-column structure; 520-perforated baffle; 530-staggered baffle; 600-reflective parts; Flow channel F; air inlet section f1; detection section f2; air outlet section f3; detection chamber C.

[0020] Detection element installation cavity D; extinction trap cavity E; 2-hood housing; 21-smoke hood; 3- fan assembly; 4-Air duct. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 invention.

[0023] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In the description of the above embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0024] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0025] Reference Figure 1-Figure 7 , are some embodiments of the range hood of the present invention. Example

[0026] like Figure 1 and Figure 2As shown, the range hood includes a range hood housing 2 and a particle concentration detection device 1 disposed on the range hood housing 2. The particle concentration detection device 1 is used to detect the particle concentration of the environment in which the range hood is located. An air duct is formed in the range hood housing 2, and a fan assembly 3 is disposed in the air duct to drive the air flow in the air duct.

[0027] See also Figure 3 The particle concentration detection device includes a shell 100 and a detection element 300 arranged in the shell.

[0028] An air inlet 111 and an air outlet 112 are provided on the housing 100 , and a flow channel F is provided inside the housing. The flow channel F is used to connect the air inlet 111 and the air outlet 112 .

[0029] The detection element 300 is used to detect the concentration of particles in the airflow entering the device. The airflow enters from the air inlet 111, is detected by the detection element 300, and is discharged through the air outlet 112 (such as Figure 3 The direction indicated by the arrow is the direction of oil smoke airflow).

[0030] In this embodiment, the air inlet of the particle concentration detection device 1 is connected to the air duct in the range hood housing 2 through the air inlet passage, and the air flow in the flow channel F is driven by the fan assembly 3.

[0031] The particle concentration detection device configured in the above-mentioned range hood adopts a fanless design internally, and uses the fan assembly inside the range hood to drive the internal airflow through the air duct. No fan is required inside, which reduces maintenance costs and energy consumption; at the same time, it makes the detection device structure more compact and reduces manufacturing costs.

[0032] In this embodiment, the fan assembly 3 is a centrifugal fan assembly, including a volute and an impeller disposed in the volute. The volute is connected to the air inlet 111 of the particle concentration detection device 1 through the induced draft pipe 4, and an induced draft channel is formed inside the induced draft pipe 4. The volute is directly connected to the induced draft pipe 4, and the air flow in the particle concentration detection device 1 can be directly driven by the fan assembly 3. In other embodiments, the induced draft pipe 4 can also be connected to the air duct outside the fan assembly 3.

[0033] See also Figure 2 The housing 2 of the range hood includes a smoke hood 21, and the particle concentration detection device 1 is arranged in the smoke hood 21. The air inlet 111 of the particle concentration detection device 1 is opened on the front side of the housing, and the air outlet 112 is arranged on the back of the housing. The smoke hood 21 has an air inlet hole corresponding to the air inlet 111, and the air outlet 112 is connected to the air duct 4. The particle concentration detection device 1 is hidden in the smoke hood 21, which can improve the appearance of the whole machine. The particle concentration detection device 1 can be arranged at the front side or the left and right sides of the smoke collecting hood 21 according to actual needs.

[0034] In this embodiment, a detection cavity C is provided in the flow channel F, and a detection element installation cavity D is provided on one side of the detection cavity C.

[0035] Specifically, the detection element 300 is an optical sensor, including a light emitter 310 and a light receiver 320 .

[0036] Optical sensors measure the concentration of particles in the air based on the principle of scattered light. When light passes through air containing particles, the particles scatter the light, and the optical sensor infers the concentration of the particles by detecting the intensity of the scattered light.

[0037] The light emitter 310 is disposed in the detection element mounting cavity D, and is used to emit light into the detection cavity C. The light emitter 310 emits light to illuminate the particles in the air. The light emitter 310 can be an infrared light emitting diode (IR LED) or a laser diode. A laser light source is preferred, which has higher accuracy and stability and can meet the needs of high-precision measurement.

[0038] The light emitted by the light emitter 310 enters the detection cavity C through the through hole opened on the flow channel F.

[0039] The optical receiver 320 is disposed in the detection cavity C, and is used to receive light scattered by particles. The optical receiver 320 is usually a photoelectric conversion device such as a photodiode or a phototransistor, which can convert the received optical signal into an electrical signal, and then obtain the concentration information of the particles through circuit processing.

[0040] Since the light emitting window of the light emitter 310 is relatively sensitive, once oil smoke, water vapor or particulate matter directly contacts the light emitter 310 , it is easy to cause deviations in the emission intensity and angle of the light, thereby affecting the accuracy of the detection result.

[0041] In order to prevent oil smoke, water vapor, etc. from affecting the light emitter 310 and affecting its detection accuracy, in this embodiment, Figure 3 As shown, at least one reflective component 600 is disposed in the detection element installation cavity D, and the light emitted by the light emitter 310 is reflected into the detection cavity by the reflective component 600. The reflective component 600 can change the optical path of the light emitter, changing the direct light into reflected light, so that the light emitter can be away from the detection cavity, which can reduce the risk of oil deposition on the surface of the light emitter, thereby improving the accuracy of the detection result, and at the same time reducing the performance degradation of the light emitter due to pollution, thereby increasing the service life.

[0042] The above-mentioned particulate matter concentration detection device isolates the light emitter 310 from the oil fume airflow by setting a detection element mounting cavity D on one side of the detection cavity C, thereby avoiding direct exposure of the light emitter 310 to the oil fume airflow; at the same time, by setting a reflective component 600 in the detection element mounting cavity D, the optical path of the light emitter 310 is changed, and the risk of oil stains deposited on the surface of the light emitter 310 is reduced, thereby improving the accuracy of the detection result, and at the same time reducing the performance degradation of the light emitter 310 due to pollution, thereby increasing the service life.

[0043] Furthermore, at least one layer of oil-blocking baffle 133 is disposed between the light emitter 310 and the detection cavity C, and a small hole for light to pass through is opened on the oil-blocking baffle 133 .

[0044] By setting at least one layer of oil baffle 133, the small holes on the oil baffle 133 can not only allow light to pass through smoothly, but also effectively block the invasion of most oil fume particles, further preventing the oil fume airflow from entering the detection element installation cavity D and directly contacting the light emitter 310, thereby greatly improving the anti-pollution ability of the device, allowing the light emitter 310 to maintain normal operation for a long time in a relatively harsh oil fume environment, thereby ensuring the accuracy and reliability of the detection.

[0045] In this embodiment, an extinction trap cavity E is provided on the other side of the detection cavity C, which is used to absorb or deflect the light passing through the detection cavity to prevent it from being reflected back into the detection cavity C. By providing an absorbing material or a special geometric shape in the extinction trap cavity E, the light is guided or scattered to the point where it can no longer be reflected back into the detection cavity C, thereby reducing the interference of stray light on the detection accuracy.

[0046] In this embodiment, an airflow blocking structure 500 is provided in the flow channel F, and along the airflow direction, the airflow blocking structure 500 is located upstream of the detection cavity. The airflow blocking structure 500 can cause the oil fume airflow in the flow channel F to collide multiple times, and through the collision, larger particles in the oil fume airflow can be decomposed into smaller particles before entering the detection area.

[0047] The cross-sectional area of ​​the flow channel F gradually decreases at the airflow blocking structure 500 to guide the airflow to pass through the airflow blocking structure at an accelerated speed.

[0048] The detection device can prevent large particles from settling and accumulating oil in the detection cavity through the collision and decomposition effect of the airflow blocking structure 500, thereby avoiding contamination of the detection element 300 and affecting the detection accuracy of the detection element. At the same time, after the large particles are mechanically collided with the airflow blocking structure, they are split into small particles with similar diameters, which are more evenly distributed when passing through the detection element 300, thereby improving the accuracy and efficiency of the detection. In addition, the cross-sectional area of ​​the flow channel F gradually decreases at the airflow blocking structure, which can increase the airflow velocity, further improve the collision effect of the airflow blocking structure, and improve the oil filtering effect.

[0049] In this embodiment, see Figure 3 The flow channel F includes an air inlet section f1, a detection section f2 and an air outlet section f3 in sequence. The air inlet section f1 is connected to the air inlet 111, the detection section f2 has a detection cavity C, and the detection element 300 detects the concentration of particles in the airflow through the detection cavity C. The air outlet section f3 is connected to the air outlet 112 for discharging the detected airflow.

[0050] In this embodiment, the airflow blocking structure 500 includes a plurality of columnar structures 510, which are arranged in a staggered manner in the flow channel F. The cross-section of the columnar structure 510 is not specifically limited, and may be circular, elliptical, diamond-shaped, etc. The columnar structures 510 are arranged in a staggered manner inside the flow channel F, so that the particles in the oil smoke airflow can undergo multiple collision and separation processes when passing through, thereby effectively improving the decomposition efficiency of large particles.

[0051] The airflow blocking structure 500 is an integrated structure with the flow channel F, or a detachable installation structure. The integrated structure can improve the overall stability of the device and reduce the assembly process; while the detachable structure is convenient for maintenance and cleaning. The user can disassemble and replace the airflow blocking structure 500 according to the actual use situation to ensure that the device is always in the best working condition. Example

[0052] In this embodiment, if Figure 4-Figure 6 As shown, the airflow blocking structure 500 may use a perforated baffle 520 with a plurality of openings, and the perforated baffles 520 are sequentially arranged in the flow channel F along the airflow direction. The plurality of perforated baffles 520 are staggered, wherein the openings on adjacent baffles do not completely overlap, so that the particles in the oil smoke airflow collide and separate multiple times when passing through the perforated baffles 520, further enhancing the decomposition effect of large particles. Figure 5 As shown, the perforated baffle 520 can be tilted downward at an angle α relative to the airflow direction so that the oil droplets accumulated on the baffle can drip smoothly. Example

[0053] In this embodiment, if Figure 7 As shown, the airflow blocking structure 500 is designed with staggered baffles 530. Multiple staggered baffles 530 form an S-shaped circuitous flow channel in the flow channel F. Through this structure, the oil smoke airflow undergoes multiple turns in the flow channel F, and the particles will continuously collide and separate in the flow channel F, reducing the presence of large particles. The staggered baffles 530 can be set obliquely relative to the airflow direction so that the oil droplets accumulated on the baffles can drip smoothly. Example

[0054] In this embodiment, the airflow blocking structure can be a labyrinth flow channel structure (not shown). The labyrinth flow channel has multiple tortuous paths. When the oil fume airflow passes through the labyrinth flow channel, the airflow direction changes continuously, causing the particles to collide in different directions, thereby decomposing smaller particles and reducing the deposition of particles. At the same time, the tortuous path in the labyrinth structure can effectively reduce airflow turbulence, while ensuring that the particles are evenly distributed in the flow channel F, and finally when entering the detection chamber, efficient and accurate detection can be ensured.

[0055] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for a person skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to replace some of the technical features therein by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions claimed to be protected by the present invention.

Claims

1. A range hood, characterized in that: include: A range hood housing, an air duct formed therein, and a fan assembly is arranged in the air duct; A particle concentration detection device, disposed on the range hood housing, for detecting the particle concentration of the external environment of the range hood; The particle concentration detection device comprises a shell and a detection element arranged in the shell; the shell is provided with an air inlet and an air outlet, and a flow channel connecting the air inlet and the air outlet is arranged in the shell; the detection element is used to detect the particle concentration in the flow channel; The air inlet is connected to the air duct through an air induction channel, and the air flow in the flow channel is driven by the fan assembly.

2. The range hood according to claim 1, characterized in that: The fan assembly includes a volute and an impeller arranged in the volute; the volute is connected to the air inlet of the particle concentration detection device through an air induced air duct, and the air induced air channel is formed inside the air induced air duct.

3. The range hood according to claim 1, characterized in that: An airflow blocking structure is arranged in the flow channel, and along the airflow direction, the airflow blocking structure is located upstream of the detection element.

4. The range hood according to claim 3, characterized in that: The airflow blocking structure includes a plurality of columnar structures, and the plurality of columnar structures are arranged in an interlaced manner in the flow channel.

5. The range hood according to claim 3, characterized in that: The airflow blocking structure also includes an open hole baffle with a plurality of openings. The multiple layers of open hole baffles are sequentially arranged in the flow channel along the airflow direction, and the openings on adjacent open hole baffles are staggered.

6. The range hood according to claim 5, characterized in that: The opening baffle is arranged obliquely relative to the airflow direction.

7. The range hood according to claim 3, characterized in that: The airflow blocking structure includes a plurality of staggered baffles arranged in a staggered manner, and the plurality of staggered baffles form an S-shaped circuitous flow channel.

8. The range hood according to claim 7, characterized in that: The staggered baffles are arranged obliquely relative to the air flow direction.

9. The range hood according to any one of claims 1 to 8, characterized in that: The flow channel has a detection cavity in it; one side of the detection cavity is provided with a detection element installation cavity; The detection element comprises a light emitter and a light receiver, wherein the light emitter is arranged in the detection element installation cavity and is used to emit light into the detection cavity, and the light receiver is arranged in the detection cavity and is used to receive light scattered by particles; At least one reflective component is disposed in the detection element installation cavity, and the light emitted by the light emitter is reflected into the detection cavity by the reflective component.

10. The range hood according to claim 9, characterized in that: At least one layer of oil baffle is arranged between the light emitter and the detection cavity, and a small hole for light to pass through is opened on the oil baffle.

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