Range hood with gas leakage detection function

Abstract

The utility model is suitable for kitchen appliance field, disclose a kind of range hood with gas leakage detection function, including shell, the centrifugal fan for being arranged in this shell and being used for extracting wind and the control module for controlling this centrifugal fan.This range hood further include the laser detection module for detecting gas concentration, the emergent laser of laser detection module and horizontal direction form first angle A, and its range is in [20 °, 90 °].This range hood integrates the laser detection module for detecting gas concentration, without additional installation can realize gas leakage detection function.Because the gas existing on laser detection path can be detected, so its detection range is larger.At the same time, laser detection module is arranged in the shell inside this range hood, and external oil fume is not easy to affect its detection function, it is favorable to keep detection accuracy under long-term use condition.

Description

Technical Field

[0001] This utility model relates to the field of kitchen appliances, and in particular to a range hood with a gas leak detection function. Background Technology

[0002] A range hood is a household appliance used to purify the kitchen environment, typically installed above the stove. Its core function is to promptly extract and remove combustion fumes and cooking fumes. However, most range hoods on the market currently lack gas leak detection capabilities, usually relying on a separate combustible gas detector. This presents several problems in practical use: first, suitable installation locations for combustible gas detectors may not have available power outlets, requiring additional wiring and making installation cumbersome; second, its sensing mechanism relies on gas molecules diffusing to the detector's location (a single point) and entering the device for detection, resulting in a "point-based" sensing range; third, after prolonged use, cooking fumes can clog the detector's vents, and accumulated fumes are difficult to clean, reducing detection accuracy. Laser gas leak detection devices are also available, but these are usually separate devices from the range hood and require additional installation. Utility Model Content

[0003] This application provides a range hood with a gas leak detection function, which aims to solve the aforementioned technical problems.

[0004] One embodiment of this application provides a range hood with a gas leak detection function, including a housing, a centrifugal fan disposed within the housing for exhaust, and a control module for controlling the centrifugal fan. The range hood also includes a laser detection module disposed within the housing for detecting gas concentration, wherein the laser emitted by the laser detection module forms a first angle A with the horizontal direction, and the angle A is within the range of [20°, 90°].

[0005] In one embodiment, with the user's direction when the range hood is in normal operation as the forward coordinate, the housing includes a front panel facing forward, and the laser emitted by the laser detection module passes through the plane of the front panel and is emitted outward.

[0006] In one embodiment, the front panel includes a non-transparent mounting plate with a light-transmitting hole; a laser detection module is located behind the front panel, and its emitted laser passes through the light-transmitting hole into the front panel.

[0007] In one embodiment, the front panel further includes a decorative panel covering the front side of the mounting plate, the decorative panel being made of a transparent material and without openings corresponding to the light-transmitting hole.

[0008] In one embodiment, the angle between the emitted laser of the laser detection module and the horizontal direction is in the range of [25°, 45°].

[0009] In one embodiment, the housing further includes a mounting base fixed to the housing, and the laser detection module is at least partially housed in the mounting base.

[0010] In one embodiment, the mounting base includes a stop portion and a mounting portion connected to the stop portion; the stop portion has a stop surface that abuts against the rear side of the front panel; the laser detection module is at least partially housed in the mounting portion.

[0011] In one embodiment, the abutting portion includes an abutting piece abutting against the rear side of the front panel and a protrusion extending outward from the abutting piece. The protrusion includes an inclined surface that forms a second included angle B with the abutting surface, and the angle of the second included angle is equal to that of the first included angle.

[0012] In one embodiment, the abutment is fixed to the rear side of the front panel, and the mounting part is rotatable relative to the abutment; when the mounting part rotates, the angle between the emitted laser of the laser detection module and the horizontal direction changes.

[0013] In one embodiment, the abutment abuts against a position off-center from the rear side of the front panel; the mounting portion has two opposing sides, one of which, off-center from the front panel, has at least one through hole, through which the laser detection module is connected to the outside of the mounting base.

[0014] In one embodiment, the abutment abuts against a position off-center from the rear side of the front panel; the mounting portion has two opposing sides, and the mounting base includes a heat sink disposed on the side away from the center of the front panel, the heat sink being at least partially made of a metal material.

[0015] In one embodiment, the heat sink is thermally connected to the heat source of the laser detection module.

[0016] In one embodiment, the heat sink has at least one through hole, through which the laser detection module is connected to the outside of the mounting base.

[0017] In one embodiment, the range hood further includes an alarm device; the laser detection module sends the detected gas concentration value to the control module; when the gas concentration value exceeds a predetermined value, the control module activates the alarm device.

[0018] The range hood with gas leak detection function according to the above embodiment integrates a laser detection module for detecting gas concentration, enabling gas leak detection without the need for separate installation. Since all gas present in the laser detection path can be detected, its detection range is large. Furthermore, the laser detection module is located inside the range hood's casing, minimizing the impact of external fumes on its detection function and helping to maintain detection accuracy over long-term use. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0020] Figure 1 This is a three-dimensional schematic diagram of a range hood with gas detection function provided in one embodiment of the present invention.

[0021] Figure 2 yes Figure 1 A three-dimensional structural diagram of the mounting base for a range hood, which houses a laser detection module.

[0022] Figure 3 yes Figure 2 A partially exploded view of the mounting bracket.

[0023] Figure 4 yes Figure 2 Mounting base and Figure 1 Side view of the front panel of the range hood.

[0024] Figure 5 yes Figure 4 A front view of the mounting plate of the front panel.

[0025] Figure 6 yes Figure 1 The diagram shows the connection of the internal modules of the range hood on the front panel.

[0026] Explanation of icon numbers:

[0027] 100. Range hood; 10. Outer shell; 20. Front panel; 22. Mounting plate; 222. Light transmission hole; 24. Decorative panel; 30. Laser detection module; 40. Centrifugal fan; 50. Mounting base; 51. Backing plate; 511. Exposure hole; 52. Backing part; 522. Backing surface; 53. Protrusion; 532. Sloping surface; 54. Mounting part; 56. Housing; 57. Through hole; 58. Cover; 59. Accommodation space; 60. Control module; 70. Alarm device.

[0028] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture. If the specific posture changes, the directional indicator will also change accordingly.

[0031] It should also be noted that when a component is described as "fixed to" or "set on" another component, it can be directly on the other component or there may be an intervening component present. When a component is described as "connected to" another component, it can be directly connected to the other component or there may be an intervening component present.

[0032] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0033] Please combine Figures 1 to 6This utility model provides a range hood 100 with a gas leak detection function. The range hood 100 includes a housing 10, a centrifugal fan 40 disposed within the housing 10 for ventilation, a control module 60 for controlling the centrifugal fan 40, and a laser detection module 30 for detecting gas concentration. The laser detection module 30 is disposed within the housing 10, but its emitted laser S can be emitted outside the range hood 100, and the emitted laser S is perpendicular to the horizontal direction (e.g.,...). Figure 4 The X direction (represented by X) forms the first included angle A, which ranges from [20°, 90°], i.e., 20°≤A≤90°. Figure 4 The included angle A shown is approximately 40 degrees. Setting the first included angle A so that the detection direction is towards the top of the kitchen, which helps to detect leaking gas more quickly.

[0034] A centrifugal fan mainly consists of three parts: an impeller, a volute, and a motor. The impeller is shaped like a multi-bladed turbine, with blades typically designed as backward-curved arcs or airfoils, densely arranged on a disc; the impeller is mounted on the motor shaft. The volute is usually a helical metal casing that tightly encloses the impeller and ultimately connects to the exhaust duct outlet. The motor provides the power source, driving the impeller to rotate at high speed. The control module accepts user input to control the centrifugal fan's on / off state, speed settings, etc.

[0035] Since the main gaseous component in the fuel gas is methane, and methane molecules have unique absorption peaks for specific wavelengths of infrared laser light (e.g., methane at 1.65 μm), the laser detection module is based on Tunable Diode Laser Absorption Spectroscopy (TDLAS) technology. The laser scanning device emits a narrowband semiconductor laser (with built-in wavelength locking to ensure test accuracy). Through current tuning, its wavelength is rapidly scanned near the target gas absorption peak. When the laser passes through the test area, if the target gas is present, the light intensity at the corresponding wavelength will be absorbed and attenuated. Based on Beer-Lambert's law, by detecting the degree of attenuation (the ratio of received light intensity to background light intensity), the known gas absorption coefficient, and the optical path length, the integral value of the gas concentration in the test area can be accurately calculated.

[0036] The control module can be a control circuit built around a chip with control functions, such as a microcontroller / microprocessor / central processing unit, and peripheral functional modules such as those for sensing user operations / external environment (e.g., gas concentration). It is equipped with necessary storage modules for storing control commands and can run on languages ​​such as C / C++ / JAVA. The aforementioned centrifugal fan, laser detection module, and control module are well-known in this technical field and will not be described further in this application.

[0037] The range hood with gas leak detection function according to the above embodiment integrates a laser detection module 30 for detecting gas concentration, enabling gas leak detection without the need for separate installation. Since all gas present along the laser detection path can be detected, its detection range is large. Furthermore, the laser detection module 30 is located inside the range hood's casing, minimizing the impact of external fumes on its detection function and helping to maintain detection accuracy over long-term use.

[0038] Specifically, the housing 10 may include a front panel 20 facing forward, through which the laser S emitted by the laser detection module 30 passes and exits outward; wherein, "forward" refers to the direction in which the user is located when the range hood is normally operated (e.g., ...). Figure 1 (as shown in the "front" position). With the above-described configuration, the laser detection module 30 will not protrude onto the plane of the front panel 20. Since the user's head is close to the front panel 20 when cooking in front of the range hood, the aforementioned configuration ensures that the laser detection module 30 will not cause the user any additional pressure; at the same time, it is also more aesthetically pleasing.

[0039] Specifically, please combine Figure 4-5 The front panel 20 may include a non-transparent mounting plate 22, which has a light-transmitting hole 222. The laser detection module 30 is located behind the front panel 20, and its emitted laser S passes through the light-transmitting hole 222 and through the front panel 20. The mounting plate 22 is made of a non-transparent material, which can serve as a shield and make the overall appearance simpler.

[0040] Furthermore, the front panel 20 may also include a decorative panel 24 covering the front side of the mounting plate 22. The decorative panel 24, corresponding to the light-transmitting hole 222, is made of transparent material and has no openings. The decorative panel 24, based on the aforementioned structure, serves to block the light-transmitting hole 222, further reducing the entry of external oil fumes into the housing 10. Simultaneously, the absence of openings in the decorative panel 24 makes it easier to clean, less prone to dirt accumulation, and more conducive to maintaining the detection accuracy of the laser detection module 30 during long-term use. The portion of the decorative panel 24 not corresponding to the light-transmitting hole 222 may also be made of transparent material.

[0041] Preferably, the angle between the emitted laser S of the laser detection module 30 and the horizontal direction X is within the range of [25°, 45°]. Taking into account factors such as the material of the decorative panel 24, the hanging height of the range hood, the user's height, the length or width of the kitchen, and the height of the kitchen, the applicant, through demonstration and experimentation, concluded that this angle range can meet the usage scenarios of most families and has high versatility.

[0042] Specifically, the housing 10 may also include a mounting base 50 fixed to the housing 10, and the laser detection module 30 is at least partially housed in the mounting base 50. For example, the mounting base 50 is fixed to the mounting plate 22 of the housing 10. Since the ambient temperature of the range hood 100 is relatively high, housing the laser detection module 30 at least partially within the mounting base 50 can minimize the impact of the relatively high temperature on the normal operation of the laser detection module 30.

[0043] Furthermore, the mounting base 50 includes abutment portion 52 and mounting portion 54 connected to abutment portion 52; abutment portion 52 has abutment surface 522 abutting against the rear side of front panel 20. Laser detection module 30 is at least partially housed in mounting portion 54. After installation, abutment surface 522 is substantially perpendicular to the horizontal direction X. With abutment surface 522 of abutment portion 52 abutting against the rear side of front panel 20, the orientation of laser detection module 30 is fixed. This arrangement not only facilitates the installation of laser detection module 30 but also improves installation accuracy.

[0044] Specifically, the abutment portion 52 includes an abutment piece 51 abutting the rear side of the front panel 20 and a protrusion 53 extending outward from the abutment piece 51. The side of the abutment piece 51 facing away from the protrusion 53 forms the aforementioned abutment surface 522, and an exposure hole 511 is provided in the middle of the abutment piece 51. The protrusion 53 includes a slope 532 forming a second included angle B with the abutment surface 522, and the second included angle B is equal to the angle A of the first included angle. The mounting portion 54 is connected to the slope 532, and the mounting portion 54 includes a housing 56 and a cover 58, which together form an accommodating space 59 for accommodating the laser detection module 30. In a cross-section perpendicular to the abutment surface 522, the mounting portion 54 is generally rectangular. After the laser detection module 30 is accommodated in the accommodating space 59, its emitted laser S is emitted through the exposure hole 511 and forms an angle of (90-A) degrees with the abutment surface 522. In this embodiment, the laser detection module 30 is completely housed within the mounting portion 54. However, it should be understood that in other embodiments, it may be partially housed therein.

[0045] Specifically, the abutment part 52 abuts against the rear side of the front panel 20, offset from the center of the front panel 20; the mounting part 54 has two opposing sides, one of which, away from the center of the front panel 20, has at least one through hole 57, through which the laser detection module 30 is connected to the outside of the mounting base 50. Figure 1As shown, the abutment part 52 is located slightly to the left of the range hood 100. This arrangement keeps the laser detection module 30 away from the heat source generated by the gas stove located directly below the range hood. Simultaneously, a through hole 57 is provided on the side away from the center of the front panel 20 (i.e., the cover 58), through which the laser detection module 30 connects to the outside of the mounting base 50, further reducing the impact of heat generated by the gas stove on the laser detection module 30. Furthermore, since the laser detection module 30 itself generates heat during operation, the through hole 57 allows heat to dissipate outwards. It should be understood that the abutment part 52 can also be located slightly to the right of the range hood.

[0046] Furthermore, the cover 58 is at least partially made of metal, which further facilitates the dissipation of heat generated during the operation of the laser detection module 30. In this case, the cover 58 is equivalent to a heat sink. Even further, the cover 58 is in thermally conductive contact with the heat source of the laser detection module 30.

[0047] Specifically, the abutment part 52 can be fixed to the rear side of the front panel 20, and the mounting part 54 can rotate relative to the abutment part 52. When the mounting part 54 rotates, the angle between the emitted laser S of the laser detection module 30 and the horizontal direction X changes. In this embodiment, the mounting part 54 is provided with a first hinge part, such as a screw hole 55 on the cover 58, and the abutment part 52 is provided with a corresponding second hinge part, such as a hole (not shown) on the abutment piece 51. Thus, the mounting part 54 can be rotatably mounted to the abutment part 52 through the cooperation of the first hinge part and the second hinge part, for example, by screw mounting. With this configuration, the angle between the emitted laser S and the horizontal direction X can be adjusted by rotating the mounting part 54, thereby making the range hood 100 more suitable for special occasions and enhancing its versatility. It should be noted that the way in which the mounting part 54 can rotate relative to the abutment part 52 is not limited to the aforementioned embodiment; any method commonly used in the art can be used. It should also be noted that the rotatable connection between the mounting part 54 and the abutment part 52 is not limited to the position described in the previous embodiment. For example, it can also be located on the opposite side of the inclined surface 532 and the screw hole 55. Figure 4 Point C in the diagram.

[0048] In the aforementioned embodiment, the laser detection module 30 is located behind the front panel 20. However, it should be understood that in other embodiments, the location of the laser detection module 30 is not limited to this; for example, it can also be located on the side of the range hood, as long as the angle between the emitted laser S and the horizontal direction is within the range of [20°, 90°].

[0049] Specifically, the range hood 100 also includes an alarm device 70. The laser detection module 30 sends the detected gas concentration value to the control module 60. When the gas concentration value exceeds a predetermined value, the control module 60 activates the alarm device 70. The alarm device 70 can emit alarm signals through sound and / or light signals, such as playing a buzzer or voice message through a speaker, flashing an alarm light reserved on the control panel of the range hood 100, or a combination of both, to attract the user's attention.

[0050] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A range hood with gas leak detection function, comprising a housing, a centrifugal fan disposed within the housing for exhaust, and a control module for controlling the centrifugal fan, characterized in that: The range hood also includes a laser detection module for detecting gas concentration, which is installed inside the housing. The laser emitted by the laser detection module forms a first angle A with the horizontal direction, and its range is [20°, 90°].

2. The range hood with gas leak detection function as described in claim 1, characterized in that, In a coordinate system with the user's direction as the front when the range hood is in normal operation, the housing includes a front panel facing forward, and the laser emitted by the laser detection module passes through the plane of the front panel and is emitted outward.

3. The range hood with gas leak detection function as described in claim 2, characterized in that, The front panel includes a non-transparent mounting plate with a light-transmitting hole; the laser detection module is located behind the front panel, and its emitted laser passes through the light-transmitting hole into the front panel.

4. The range hood with gas leak detection function as described in claim 3, characterized in that, The front panel also includes a decorative panel covering the front side of the mounting plate, which is made of transparent material and has no openings corresponding to the light-transmitting hole.

5. The range hood with gas leak detection function as described in claim 4, characterized in that, The angle between the emitted laser of this laser detection module and the horizontal direction is in the range of [25°, 45°].

6. The range hood with gas leak detection function as described in claim 2, characterized in that, The housing also includes a mounting base to which the laser detection module is at least partially housed.

7. The range hood with gas leak detection function as described in claim 6, characterized in that, The mounting base includes a backing portion and a mounting portion connected to the backing portion; the backing portion has a backing surface that abuts against the rear side of the front panel; the laser detection module is at least partially housed in the mounting portion.

8. The range hood with gas leak detection function as described in claim 7, characterized in that, The abutting part includes an abutting piece abutting against the rear side of the front panel and a protrusion extending outward from the abutting piece. The protrusion includes an inclined surface that forms a second angle B with the abutting surface, and the angle of the second angle is equal to that of the first angle.

9. The range hood with gas leak detection function as described in claim 7, characterized in that, The abutment is fixed to the rear side of the front panel, and the mounting part can rotate relative to the abutment; when the mounting part rotates, the angle between the emitted laser of the laser detection module and the horizontal direction changes.

10. The range hood with gas leak detection function as described in claim 7, characterized in that, The abutting part abuts against the rear side of the front panel, which is off-center from the front panel; the mounting part has two opposing sides, one of which is far from the center of the front panel and has at least one through hole, through which the laser detection module is connected to the outside of the mounting base.

11. The range hood with gas leak detection function as described in claim 7, characterized in that, The abutment abuts against the rear side of the front panel at a position off-center from the center of the front panel; the mounting part has two opposite sides, and the mounting base includes a heat sink plate disposed on the side away from the center of the front panel, the heat sink plate being at least partially made of metal.

12. The range hood with gas leak detection function as described in claim 11, characterized in that, The heat sink makes thermally conductive contact with the heat source of the laser detection module.

13. The range hood with gas leak detection function as described in claim 12, characterized in that, The heat sink has at least one through hole, through which the laser detection module is connected to the outside of the mounting base.

14. The range hood with gas leak detection function as described in claim 1, characterized in that, It also includes an alarm device; the laser detection module sends the detected gas concentration value to the control module; when the gas concentration value exceeds a predetermined value, the control module activates the alarm device.

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