Smoke detector and range hood

Abstract

The present invention provides a smoke detector and a range hood, wherein the smoke detector comprises a detection light emitting mechanism and a detection light receiving mechanism, the detection light emitting mechanism comprises an emission protection device and a light emitting device, the emission protection device comprises an emission fixing piece and an emission straightening piece, the emission fixing piece is provided with a first through hole through which the detection light emitted by the light emitting device can pass, the emission straightening piece comprises a first baffle, a second baffle and a third baffle, the first baffle is provided with a second through hole opposite to the first through hole, the second baffle is provided with a first recess opposite to the second through hole, the third baffle is provided with a second recess opposite to the second through hole, wherein the areas formed by the projections of the first recess and the second recess on the first baffle respectively surround the second through hole, the structure is novel, the material cost is reduced, and the collimation of the detection light is effectively guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of smoke detection, and in particular to a smoke detector and a range hood. Background Art

[0002] The range hood is one of the indispensable appliances in the family kitchen. It is mainly used to absorb the fumes generated during cooking. When the kitchen is full of fumes, the air containing the fumes is drawn into the hood and discharged through the flue to achieve the purpose of exhausting the fumes and improving the air. In addition, the existing range hoods can be intelligently controlled, for example, by using sensors to detect the concentration of fumes to achieve automatic control of the fan speed of the range hood, thereby improving the efficiency of exhausting fumes.

[0003] For example, the patent application number is CN201610402906.5, and the patent name is an invention patent for a range hood capable of detecting oil fume concentration. It discloses that a detection light emitting device and a detection light receiving device are installed on the fan housing, and the intersection area of ​​the straight line where the emission direction of the detection light emitting device is located and the straight line where the reception direction of the detection light receiving device is located is located below the air inlet of the fan housing, so as to detect the amount of oil fume entering the fan to control the speed of the fan. The detection light emitting device includes a light emitting part and a protective structure, and the detection light receiving device also includes a light receiving part and a protective structure. The protective structure includes a closed protective cover, and the protective cover has a tubular cavity inside. A blocking plate with the same cross-sectional shape as the tubular cavity is provided in the middle of the tubular cavity, and a through hole is opened on the blocking plate to eliminate the non-collimated light emitted by the light emitting part through the internal emission of the blocking plate, thereby ensuring the collimation of the emitted light.

[0004] However, since the existing blocking plate is arranged in the tubular cavity of the closed protective cover, and the shape of the blocking plate is the same as the cross-sectional shape of the tubular cavity, not only the material cost is increased, but also the weight is heavy, resulting in limited application of the product and failure to be widely promoted in a timely manner. Summary of the invention

[0005] In order to solve the above problems, the present invention provides a smoke detector and a range hood with novel structure and effectively reduced cost.

[0006] A smoke detector comprising:

[0007] The detection light emitting mechanism comprises an emission protection device and a light emitting device, the emission protection device comprises an emission fixing piece and an emission straightening piece, the two ends of the emission fixing piece are an emission closed end and an emission open end respectively, the light emitting device is installed in the emission fixing piece through the emission open end, a first through hole is provided on the emission closed end so that the detection light emitted by the light emitting device can pass through, the emission straightening piece comprises a first baffle, a second baffle and a third baffle, the first baffle is located at one side of the emission closed end, and a second through hole opposite to the first through hole is provided on the first baffle, the second baffle is located between the emission closed end and the first baffle, and a first recess opposite to the second through hole is provided on the second baffle, the third baffle is located on the side of the first baffle away from the second baffle, and a second recess opposite to the second through hole is provided on the third baffle, wherein the areas formed by the projections of the first recess and the second recess on the first baffle respectively surround the second through hole;

[0008] The detection light receiving mechanism comprises a receiving protection device and a light receiving device, the receiving protection device comprises a receiving fixing part and a receiving straightening part, the two ends of the receiving fixing part are a receiving closed end and a receiving open end respectively, the light receiving device is installed in the receiving fixing part through the receiving open end, a third through hole is provided on the receiving closed end so that the light receiving device can receive the light refracted by the smoke to be measured, the receiving straightening part comprises a fourth baffle, a fifth baffle and a sixth baffle, the fourth baffle is located at one side of the receiving closed end, and a fourth through hole opposite to the third through hole is provided on the fourth baffle, the fifth baffle is located between the receiving closed end and the fourth baffle, and a third recess opposite to the fourth through hole is provided on the fifth baffle, the sixth baffle is located on the side of the fourth baffle away from the fifth baffle, and a fourth recess opposite to the fourth through hole is provided on the sixth baffle, wherein the areas formed by the projections of the third recess and the fourth recess on the fourth baffle respectively surround the fourth through hole.

[0009] Furthermore, the receiving and straightening member further includes a seventh baffle, the seventh baffle is located between the fourth baffle and the sixth baffle, and a fifth recess opposite to the fourth through hole is provided on the seventh baffle.

[0010] Further, the areas of the regions formed by the projections of the second baffle and the third baffle on the first baffle are both less than or equal to half of the area of ​​the first baffle;

[0011] The areas of the regions formed by the projections of the fifth baffle, the sixth baffle and the seventh baffle on the fourth baffle are all smaller than or equal to half of the area of ​​the fourth baffle.

[0012] Furthermore, the emission straightening part also includes a first support portion and a second support portion, the first support portion extends along the edge of the emission closed end to the edge of the first baffle, the second baffle is arranged on the first support portion, the second support portion extends along the edge of the first baffle to the edge of the third baffle, and the first support portion and the second support portion are both arc-shaped.

[0013] Furthermore, the receiving and straightening member also includes a third support portion and a fourth support portion, the third support portion extends along the edge of the receiving closed end to the edge of the fourth baffle, the fifth baffle is arranged on the third support portion, the fourth support portion extends from the edge of the fourth baffle to the sixth baffle, the seventh baffle is installed on the fourth support portion, and the third support portion and the fourth support portion are both arc-shaped.

[0014] Furthermore, it also includes:

[0015] The first sleeve device comprises a first cylinder, one end of the first cylinder is closed and the other end is open, the detection light emitting mechanism is inserted into the first cylinder through the open end, a fifth through hole is formed on the closed end of the first cylinder, and the fifth through hole is coaxial with the second through hole;

[0016] The second sleeve device includes a second cylinder, one end of which is closed and the other end is open. The detection light receiving mechanism is inserted into the interior of the second cylinder through the open end. A sixth through hole is opened on the closed end of the second cylinder. The sixth through hole is coaxial with the fourth through hole so that the light refracted by the smoke to be detected can pass through the sixth through hole.

[0017] Furthermore, it also includes a fixing seat, and the first sleeve device and the second sleeve device are installed on the fixing seat.

[0018] Furthermore, the first sleeve device also includes a first insert tube, which is connected to the first cylinder and the two are set at an angle, and the second sleeve device also includes a second insert tube, which is connected to the second cylinder and the two are set at an angle, wherein the first insert tube and the second insert tube are respectively plugged into the fixing seat.

[0019] Furthermore, first plug plates are respectively provided on both sides of the first plug pipe, and a first plug portion matching with the first plug plates is provided on the fixing seat and connected by fasteners;

[0020] Second plug plates are respectively arranged on both sides of the second plug pipe, and a second plug portion matching with the second plug plates is arranged on the fixing seat and connected by fasteners.

[0021] A range hood comprises the smoke detector and a fan, wherein the smoke detector is used to detect smoke concentration and control the fan speed according to the smoke concentration.

[0022] Compared with the prior art, this technical solution has the following advantages:

[0023] The emission protection device is sleeved inside the first sleeve device, and the detection light receiving mechanism is sleeved inside the second sleeve device. The first sleeve device and the second sleeve device are fixed on a fixed seat so that the detection light emitting mechanism and the detection light receiving mechanism are arranged at an angle, wherein the detection light emitting mechanism emits detection light, and the detection light receiving mechanism is used to receive the detection light refracted by the smoke to obtain the concentration of the smoke to be measured. In the emission protection device structure, the area formed by the projection of the first concave portion and the second concave portion on the first baffle respectively surrounds the second through hole, and the area formed by the projection of the second baffle and the third baffle on the first baffle respectively is less than or equal to half of the area of ​​the first baffle, which is novel in structure, reduces material cost, is light in weight, and effectively ensures the collimation of the detection light. Similarly, in the receiving protection device structure, the area formed by the projection of the third concave portion and the fourth concave portion on the fourth baffle respectively surrounds the fourth through hole, and the area formed by the projection of the fifth baffle and the sixth baffle on the fourth baffle respectively is less than or equal to half of the area of ​​the fourth baffle.

[0024] The present invention is further described below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic structural diagram of a preferred embodiment of the smoke detector according to the present invention;

[0026] Figure 2 is an exploded view of the above preferred embodiment of the smoke detector according to the present invention;

[0027] Figure 3 is a schematic diagram of a preferred embodiment of the launch protection device according to the present invention;

[0028] Figure 4 is based on Figure 3 A schematic diagram of another direction of the launch protection device shown;

[0029] Figure 5 is based on Figure 3 A schematic diagram of another direction of the launch protection device shown;

[0030] Figure 6is a schematic diagram of a preferred embodiment of the receiving protection device according to the present invention;

[0031] Figure 7 is based on Figure 6 A schematic diagram of another direction of the receiving protection device shown;

[0032] Figure 8 is based on Figure 6 A schematic diagram of another direction of the receiving protection device shown;

[0033] Fig. 9 is a schematic diagram of a preferred embodiment of the first sleeve device according to the present invention;

[0034] Fig.10 is based on Fig. 9 A schematic diagram of the first sleeve device in another direction shown;

[0035] Fig.11 is a schematic diagram of a preferred embodiment of the second sleeve device according to the present invention;

[0036] Fig.12 is based on Fig.11 Another schematic diagram of the second sleeve device is shown. DETAILED DESCRIPTION

[0037] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations. The basic principles of the present invention defined in the following description can be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not deviate from the spirit and scope of the present invention.

[0038] Those skilled in the art should understand that, in the disclosure of the present invention, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the above terms should not be understood as limiting the present invention.

[0039] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0040] like Figure 1 to Figure 2 The figure is a schematic diagram of a smoke detector according to a preferred embodiment of the present invention, comprising a detection light emitting mechanism 100 and a detection light receiving mechanism 200, wherein the detection light emitting mechanism 100 is used to emit detection light, and the detection light receiving mechanism 200 is used to receive detection light. After the received detection light is refracted by the smoke to be detected, the light intensity will change, and the light intensity will be further converted into an electrical signal with the help of a photoelectric element to obtain the concentration of the smoke to be detected.

[0041] like Figures 2 to 5 As shown, the detection light emitting mechanism 100 includes an emission protection device 110 and a light emitting device 120, the emission protection device 110 includes an emission fixing member 111 and an emission straightening member 112, the two ends of the emission fixing member 111 are respectively an emission closed end 1111 and an emission open end 1112, the light emitting device 120 is installed in the emission fixing member 111 through the emission open end 1112, and a first through hole 11111 is provided on the emission closed end 1111 to allow the detection light emitted by the light emitting device 120 to pass through. The emission straightening member 112 includes a first baffle 1121, a second baffle 1122 and a third baffle 1123, wherein the first baffle 1121 is located at one side of the emission closed end 1111, and the first baffle 1121 is provided with a second through hole 11211 opposite to the first through hole 11111, the second baffle 1122 is located between the emission closed end 1111 and the first baffle 1121, and the second baffle 1122 is provided with a first recess 11221 opposite to the second through hole 11211, the third baffle 1123 is located at a side of the first baffle 1121 away from the second baffle 1122, and the third baffle 1123 is provided with a second recess 11231 opposite to the second through hole 11211, wherein the areas formed by the projections of the first recess 11221 and the second recess 11231 on the first baffle 1121 surround the second through hole 11211.

[0042] Specifically, the cross section of the second through hole 11211 is circular, the cross sections of the first recess 11221 and the second recess 11231 are both semicircular, and the first recess 11221 and the second recess 11231 are arranged opposite to each other, so that the two form a closed annular ring around the second through hole 11211 in the projection area. The arc lengths of the first recess 11221 and the second recess 11231 are consistent, both being half of the arc length of the second through hole 11211, so that the first recess 11221 and the second recess 11231 can surround the second through hole 11211, of course, the arc length of the first recess 11221 is half of the arc length of the second through hole 11211, and the arc length of the second recess 11231 is longer than that of the first recess 11221, that is, there is an overlap between the two.

[0043] The light emitting device 120 emits detection light through the first through hole 11111. The detection light is firstly straightened by the second baffle plate 1122 and passes through the first recess 11221 on the second baffle plate 1122. Then, the detection light is straightened by the first baffle plate 1121 and passes through the second through hole 11211 on the first baffle plate 1121. Finally, the detection light is straightened by the third baffle plate 1123 and passes through the second recess 11231 on the third baffle plate 1123 until it is irradiated on the smoke to be detected, thereby reflecting and eliminating the non-collimated light, thereby ensuring the collimation of the detection light and improving the detection accuracy.

[0044] like Figure 3 and Figure 4 As shown, the area formed by the projections of the second baffle 1122 and the third baffle 1123 on the first baffle 1121 is less than or equal to half of the area of ​​the first baffle 1121. For example, the first baffle 1121 is circular, the second baffle 1122 and the third baffle 1123 are semicircular, the second through hole 11211 is located at the center of the first baffle 1121, the first recess 11221 is located at the center of the second baffle 1122, the second recess 11231 is located at the center of the third baffle 1123, and the centers of the first baffle 1121, the second baffle 1122 and the third baffle 1123 are all on the same straight line. It can be seen that the area formed by the projections of the second baffle 1122 and the third baffle 1123 on the first baffle 1121 is semicircular, and its area is less than or equal to half of the area of ​​the first baffle 1121. The structure is simple and novel, the cost is reduced, the weight is light, and the collimation of the detection light is effectively guaranteed.

[0045] It should be noted that the shapes of the second baffle 1122 and the third baffle 1123 can be appropriately deformed, as long as the shape formed by the first recess 11221 and the second recess 11231 thereon can surround the second through hole 11211. For example, the second baffle 1122 is semicircular, and the third baffle 1123 is square, etc., which are not limited here.

[0046] like Figure 3 and Figure 4 As shown, the emission straightening member 112 also includes a first support portion 1124 and a second support portion 1125, the first support portion 1124 extends along the edge of the emission closed end 1111 to the edge of the first baffle 1121, the second baffle 1122 is arranged on the first support portion 1124, and the second support portion 1125 extends along the edge of the first baffle 1121 to the edge of the third baffle 1123.

[0047] Specifically, the cross-sectional shape of the launch fixture 111 is consistent with that of the first baffle 1121, and both are circular. The first support portion 1124 and the second support portion 1125 are both arc-shaped and are located on opposite sides of the first baffle 1121, so that the second baffle 1122 and the third baffle 1123 are arranged opposite to each other. Since the first support portion 1124 and the second support portion 1125 are both arc-shaped and arranged opposite to each other, the cost is effectively reduced. Of course, the first support portion 1124 and the second support portion 1125 can be annular.

[0048] More specifically, the first support portion 1124 and the second baffle 1122 have the same curvature, which is half of the curvature of the first circular baffle 1121. Of course, the curvature of the first support portion 1124 may be greater than the curvature of the second baffle 1122. The second support portion 1125 and the third baffle 1123 have the same curvature, which is half of the curvature of the first circular baffle 1121. Preferably, the curvature of the second support portion 1125 and the third baffle 1123 is smaller than half of the curvature of the first baffle 1121, so that the end of the emission straightening member 112 away from the emission fixing member 111 is smaller, thereby reducing materials and reducing costs.

[0049] like Figure 3 and Figure 4 As shown, the distance from the second baffle 1122 to the first baffle 1121 is greater than the distance from the third baffle 1123 to the first baffle 1121 .

[0050] In addition, the number of the second baffles 1122 and the third baffles 1123 can be multiple. For example, when the first support portion 1124 is long and in order to improve the collimation of the detection light, the number of the second baffles 1122 can be increased, wherein the multiple second baffles 1122 are arranged at intervals along the length direction of the first support portion 1124, and the projection areas of the multiple second baffles 1122 on the first baffle 1121 overlap. Of course, the multiple second baffles 1122 can be arranged in a spiral along the axis of the second through hole 11211. Similarly, the projection areas of the multiple third baffles 1123 on the first baffle 1121 can overlap, or can be arranged in a spiral along the axis of the second through hole 11211.

[0051] In addition, the second through hole 11211 and the first through hole 11111 are coaxially arranged, and the diameter of the second through hole 11211 may be greater than the diameter of the first through hole 11111. It is worth noting that the ring-shaped projection of the first recess 11221 and the second recess 11231 on the first baffle 1121 may coincide with the second through hole 11211.

[0052] like Figure 5 As shown, at least one first slot 1113 is provided on the inner wall of the emission fixture 111, so that the light emitting device 120 can slide into the emission fixture 111 along the first slot 1113. Preferably, there are two first slots 1113, which are arranged opposite to each other. By providing the first slots 1113, the emission fixture 111 can be firmly fixed on the emission fixture 111, and the assembly is convenient.

[0053] like Figure 3 As shown, the light emitting device 120 includes an emitting control board 121 and an emitting unit 122. The emitting unit 122 is electrically connected to the emitting control board 121 for emitting detection light. The emitting control board 121 is plugged into the first slot 1113 so that the emitting unit 122 is arranged opposite to the first through hole 11111.

[0054] like Figure 3 and Figure 5 As shown, the emitting fixture 111 may be provided with a first notch 1114 as long as it does not affect the setting of the first slot 1113 and the installation of the light emitting device 120, which not only reduces weight but also achieves the purpose of reducing costs.

[0055] The launch fixing member 111 and the launch straightening member 112 can be formed in one piece, and can also be assembled and connected by means of sleeve connection or fasteners.

[0056] like Figure 2 , Figures 6 to 8 As shown, the detection light receiving mechanism 200 includes a receiving protection device 210 and a light receiving device 220. The shape of the receiving protection device 210 and the transmitting protection device 110 may be consistent, or may be inconsistent. For example, the receiving protection device 210 includes a receiving fixture 211 and a receiving straightening member 212. The two ends of the receiving fixture 211 are respectively a receiving closed end 2111 and a receiving open end 2112. The light receiving device 220 is installed in the receiving fixture 211 through the receiving open end 2112. A third through hole 21111 is provided on the receiving closed end 2111 so that the light receiving device 220 can receive light refracted by the smoke to be measured. The receiving and straightening member 212 includes a fourth baffle 2121, a fifth baffle 2122 and a sixth baffle 2123. The fourth baffle 2121 is located at one side of the receiving closed end 2111, and the fourth baffle 2121 is provided with a fourth through hole 21211 opposite to the third through hole 21111. The fifth baffle 2122 is located between the receiving closed end 2111 and the fourth baffle 2121, and the fifth baffle 2122 is provided with a fourth through hole 21211 opposite to the third through hole 21111. The third recess 21221 is opposite to the fourth through hole 21211, and the sixth baffle 2123 is located on the side of the fourth baffle 2121 away from the fifth baffle 2122. The sixth baffle 2123 is provided with a fourth recess 21231 opposite to the fourth through hole 21211, wherein the areas formed by the projections of the third recess 21221 and the fourth recess 21231 on the fourth baffle 2121 respectively surround the fourth through hole 21211.

[0057] Specifically, the cross section of the fourth through hole 21211 is circular, the cross sections of the third recess 21221 and the fourth recess 21231 are both semicircular, and the third recess 21221 and the fourth recess 21231 are arranged opposite to each other, so that the two form a closed annular ring around the fourth through hole 21211 in the projection area. The arc lengths of the third recess 21221 and the fourth recess 21231 are consistent, and both are half of the arc length of the fourth through hole 21211, so that the third recess 21221 and the fourth recess 21231 can surround the fourth through hole 21211. Of course, the arc length of the third recess 21221 is half of the arc length of the fourth through hole 21211, and the arc length of the fourth recess 21231 can be longer than the arc length of the third recess 21221, that is, there is an overlap between the two.

[0058] like Figure 8As shown, the receiving and straightening member 212 further includes a seventh baffle 2124 , which is located between the fourth baffle 2121 and the sixth baffle 2123 , and a fifth recess 21241 opposite to the fourth through hole 21211 is disposed on the seventh baffle 2124 .

[0059] Specifically, the projections of the fifth recess 21241 and the fourth recess 21231 on the fourth baffle 2121 overlap. For example, the cross-sections of the fifth recess 21241 and the fourth recess 21231 are both semicircular, and the arc lengths of the two are consistent. Of course, the arc length of the fifth recess 21241 can be longer than the arc length of the fourth recess 21231, which is not limited here.

[0060] The light refracted by the smoke to be measured is firstly straightened by the sixth baffle plate 2123 and passes through the fourth recess 21231 on the sixth baffle plate 2123, and then straightened by the seventh baffle plate 2124 and passes through the fifth recess 21241 on the seventh baffle plate 2124, and then straightened by the fourth baffle plate 2121 and passes through the fourth through hole 21211 on the fourth baffle plate 2121, and then straightened by the fifth baffle plate 2122 and passes through the third recess 21221 on the fifth baffle plate 2122, and finally passes through the third through hole 21111 on the receiving closed end 2111 and is received by the light receiving device 220, so as to emit and eliminate the non-collimated light after the refraction, thereby ensuring the collimation of the detection light and improving the detection accuracy.

[0061] like Figures 6 to 8 As shown, the areas formed by the projections of the fifth baffle 2122 , the sixth baffle 2123 and the seventh baffle 2124 on the fourth baffle 2121 are all smaller than or equal to half of the area of ​​the fourth baffle 2121 . For example, the fourth baffle 2121 is circular, the fifth baffle 2122, the sixth baffle 2123 and the seventh baffle 2124 are semicircular, the fourth through hole 21211 is located at the center of the fourth baffle 2121, the third recess 21221 is located at the center of the fifth baffle 2122, the fourth recess 21231 is located at the center of the sixth baffle 2123, the fifth recess 21241 is located at the center of the seventh baffle 2124, and the centers of the fourth baffle 2121, the fifth baffle 2122, the sixth baffle 2123 and the seventh baffle 2124 are located on the same straight line, and it can be seen that the projections of the fifth baffle 2122, the sixth baffle 2123 and the seventh baffle 2124 on the fourth baffle 2121 are all semicircular, and their areas are all less than or equal to half of the fourth baffle 2121. The structure is simple and novel, the cost is reduced, and the weight is light.

[0062] Specifically, the fifth baffle 2122 and the sixth baffle 2123 are respectively located on both sides of the fourth baffle 2121 so that the third recess 21221 and the fourth recess 21231 are opposite to each other, wherein the seventh baffle 2124 and the sixth baffle 2123 are located on the same side of the fourth baffle 2121 so that the fifth recess 21241 and the third recess 2122 are opposite to each other.

[0063] It should be noted that the shapes of the fifth baffle 2122, the sixth baffle 2123 and the seventh baffle 2124 can be appropriately deformed, as long as the shapes formed by the third recess 21221, the fourth recess 21231 and the fifth recess 21241 thereon can surround the fourth through hole 21211. For example, the fifth baffle 2122 and the seventh baffle 2124 are both semicircular, and the sixth baffle 2123 is square.

[0064] like Figures 6 to 8 As shown, the receiving straightening member 212 also includes a third support portion 2125 and a fourth support portion 2126, the third support portion 2125 extends along the edge of the receiving closed end 2111 to the edge of the fourth baffle 2121, the fifth baffle 2122 is arranged on the third support portion 2125, the fourth support portion 2126 extends from the edge of the fourth baffle 2121 to the sixth baffle 2123, and the seventh baffle 2124 is installed on the fourth support portion 2126.

[0065] Specifically, the receiving fixing member 211 and the fourth baffle 2121 have the same cross-sectional shape, both of which are circular, etc. The third support portion 2125 and the fourth support portion 2126 are both arc-shaped, and are located on opposite sides of the fourth baffle 2121, so that the sixth baffle 2123 and the seventh baffle 2124 are located on the same side of the fourth baffle 2121 and are arranged opposite to the fifth baffle 2122. Since the third support portion 2125 and the fourth support portion 2126 are both arc-shaped and arranged opposite to each other, the cost is effectively reduced. Of course, the third support portion 2125 and the fourth support portion 2126 can also be annular.

[0066] More specifically, the curvature of the third support portion 2125 is consistent with that of the fourth support portion 2126, and both are half of the curvature of the fourth baffle 2121 in a circular shape. Of course, the curvature of the third support portion 2125 may be greater than that of the fourth support portion 2126. The curvature of the fifth baffle 2122 may be consistent with that of the third support portion 2125, and both are half of the curvature of the fourth baffle 2121 in a circular shape. Of course, the curvature of the third support portion 2125 may be greater than that of the fifth baffle 2122. The curvature of the seventh baffle 2124 may be consistent with that of the fourth support portion 2126, and both are half of the curvature of the fourth baffle 2121 in a circular shape. The curvature of the sixth baffle 2123 may be less than half of the curvature of the fourth baffle 2121, so that the end of the receiving straightening member 212 away from the receiving fixing member 211 is smaller, thereby reducing materials and reducing costs.

[0067] like Figures 6 to 8 As shown, the distance between the fifth baffle 2122 and the fourth baffle 2121, the distance between the fourth baffle 2121 and the seventh baffle 2124, and the distance between the seventh baffle 2124 and the sixth baffle 2123 are all equal. Of course, the corresponding distances can be adjusted as needed.

[0068] In addition, the number of the fifth baffle 2122 and the seventh baffle 2124 can be multiple. For example, multiple seventh baffles 2124 are arranged at intervals along the axis of the fourth through hole 21211, and the projection areas of the multiple seventh baffles 2124 on the fourth baffle 2121 overlap. Of course, the multiple seventh baffles 2124 are arranged in a spiral along the axis of the fourth through hole 21211.

[0069] In addition, the fourth through hole 21211 and the third through hole 21111 are coaxially arranged, and the diameter of the fourth through hole 21211 may be greater than the diameter of the third through hole 21111. It is worth noting that the third recess 21221, the fourth recess 21231 and the fifth recess 21241 are projected on the fourth baffle 2121 to form a ring shape, which coincides with the fourth through hole 21211.

[0070] like Figure 6 and Figure 7 As shown, at least one second slot 2113 is provided on the inner wall of the receiving fixture 211, so that the light receiving device 220 can slide into the receiving fixture 211 along the second slot 2113. Preferably, there are two second slots 2113, which are arranged opposite to each other. By providing the second slots 2113, the light receiving device 220 can be firmly fixed in the receiving fixture 211, and the assembly is convenient.

[0071] like Figure 3 As shown, the light receiving device 220 includes a receiving control board 221 and a receiving part 222. The receiving part 222 is electrically connected to the receiving control board 221 for receiving the refracted detection light. The receiving control board 221 is plugged into the second slot 2113 so that the receiving part 222 is arranged opposite to the third through hole 21111.

[0072] like Figure 6 and Figure 7 As shown, the receiving fixture 211 may be provided with a second notch 2114 as long as it does not affect the arrangement of the second slot 2113 and the installation of the light receiving device 220 , which not only reduces weight but also achieves the purpose of reducing costs.

[0073] The receiving fixing member 211 and the receiving straightening member 212 can be integrally formed, and can also be assembled and connected by means of sleeve connection or fasteners.

[0074] like Figure 2 As shown, the smoke detector further includes a first sleeve device 300 and a second sleeve device 400, the detection light emitting mechanism 100 is sleeved inside the first sleeve device 300, and the detection light receiving mechanism 200 is sleeved inside the second sleeve device 400. By providing the first sleeve device 300 and the second sleeve device 400, the oil smoke adhering to the detection light emitting mechanism 100 and the detection light receiving mechanism 200 is reduced.

[0075] like Fig. 9 and Fig.10 As shown, the first sleeve device 300 includes a first cylinder 310, one end of the first cylinder 310 is closed, and the other end is open, the detection light emitting mechanism 100 is inserted into the first cylinder 310 through the open end, and a fifth through hole 311 is opened on the closed end of the first cylinder 310, and the fifth through hole 311 is coaxial with the second through hole 11211, so that the detection light emitted by the light emitting device 120 on the detection light emitting mechanism 100 is irradiated on the smoke to be detected through the fifth through hole 311.

[0076] Specifically, refer to Figures 2 to 4 One end of the launch straightening member 112 having a third baffle 1123 is inserted into the first cylinder 310 so that the third baffle 1123 abuts against the closed end of the first cylinder 310. At this time, the end of the launch fixing member 111 facing away from the launch straightening member 112 is located at the open end of the first cylinder 310.

[0077] like Figure 4 and Fig.10As shown, at least one first slot 312 is provided on the inner wall of the first cylinder 310, and a first clip 1115 cooperating with the first slot 312 is provided on the launch fixing member 111. Through the cooperation of the two, the launch protection device 110 can be clamped in the first cylinder 310 and prevented from rotating.

[0078] Specifically, refer to Figures 3 to 5 The number of the first clamping strip 1115 is one, the first clamping strip 1115 and the first notch 1114 are arranged opposite to each other, and the center line connecting the two is perpendicular to the center line connecting the two first slots 1113.

[0079] like Fig.11 and Fig.12 As shown, the second sleeve device 400 includes a second cylinder 410, one end of the second cylinder 410 is closed and the other end is open, the detection light receiving mechanism 200 is inserted into the second cylinder 410 through the open end, and a sixth through hole 411 is opened on the closed end of the second cylinder 410, and the sixth through hole 411 is coaxial with the fourth through hole 21211, so that the light refracted by the smoke to be detected passes through the sixth through hole 411 and is received by the light receiving device 220.

[0080] Specifically, refer to 2. Figures 6 to 8 One end of the sixth baffle 2123 of the receiving and straightening member 212 is inserted into the second cylinder 410 so that the sixth baffle 2123 abuts against the closed end of the second cylinder 410. At this time, the end of the receiving fixing member 211 facing away from the receiving and straightening member 212 is located at the open end of the second cylinder 410.

[0081] like Figure 8 and Fig.12 As shown, at least one second slot 412 is provided on the inner wall of the second cylinder 410, and a second clip 2115 cooperating with the second slot 412 is provided on the receiving fixture 211. The two cooperate to enable the receiving protection device 210 to be clamped in the second cylinder 410 and prevent the receiving protection device 210 from rotating.

[0082] refer to Figure 8 The number of the second card strips 2115 is two, and by increasing the number, the connection strength between the two is improved.

[0083] like Figure 1 As shown, the smoke detector also includes a fixing base 500, and the first sleeve device 300 and the second sleeve device 400 are installed on the fixing base 500, so that the detection light emitting mechanism 100 and the detection light receiving mechanism 200 are set at an angle so that the intersection point of the two can be on the smoke to be detected.

[0084] like Figure 1 and Figure 2 As shown, the first sleeve device 300 and the second sleeve device 400 are respectively detachably mounted on the fixing seat 500 .

[0085] like Fig. 9 and Fig.10 As shown, the first sleeve device 300 further includes a first inserting tube 320, and the first inserting tube 320 is connected to the first cylinder 310, and the two are arranged at an angle. Fig.11 and Fig.12 As shown, the second sleeve device 400 further includes a second insert 420, and the second insert 420 is connected to the second cylinder 410, and the two are set at an angle. The first insert 320 and the second insert 420 are respectively plugged into the fixing seat 500. The surface of the fixing seat 500 on which the first sleeve device 300 and the second sleeve device 400 are respectively installed is a plane. Since the first insert 320 and the first cylinder 310 are set at an angle, and the second insert 420 and the second cylinder 410 are set at an angle, the first cylinder 310 and the second cylinder 410 are set at an angle. Figure 1 , so that the detection light emitting mechanism 100 and the detection light receiving mechanism 200 installed thereon are arranged at an angle.

[0086] For example, the angle between the first cannula 320 and the first cylinder 310 is 45°, the angle between the second cannula 420 and the second cylinder 410 is 45°, and the angle between the first cylinder 310 and the second cylinder 410 is 90°.

[0087] like Figure 2 As shown, the fixing seat 500 is provided with a first plug hole 510 and a second plug hole 520 , the first plug tube 320 is plugged into the first plug hole 510 , and the second plug tube 420 is plugged into the second plug hole 520 .

[0088] Specifically, the first sleeve device 300 and the second sleeve device 400 may be fixedly secured by fasteners in addition to being plugged in. Fig. 9 and Fig.10 , first plug plates 330 are respectively provided on both sides of the first plug pipe 320, and first mounting holes 331 are opened on the first plug plates 330. Figure 2The fixing seat 500 is provided with a first plug part 530 that cooperates with the first plug plate 330. When the first plug tube 320 is inserted into the first plug hole 510, the first plug plate 330 is embedded in the first plug part 530 to prevent the first sleeve device 300 from rotating so as to facilitate subsequent fastener fixation. The fastener can pass through the first mounting hole 331 and be threadedly connected to the fixing seat 500. The fastener includes a screw or a bolt. In addition, a first positioning column 531 is provided in the first plug part 530, and a first positioning hole 332 that cooperates with the first positioning column 531 is provided on the first plug plate 330, so that the two are first positioned and then fixed by the fastener. Reference Fig.11 and Fig.12 As shown, the second plug plate 430 is respectively provided on both sides of the second plug pipe 420, and the second plug plate 430 is provided with a second mounting hole 431. Figure 2 The fixing seat 500 is provided with a second plug part 540 that matches with the second plug plate 430. When the second plug tube 420 is plugged into the second plug hole 520, the second plug plate 430 is embedded in the second plug part 540 to prevent the second sleeve device 400 from rotating so as to facilitate subsequent fastener fixation. The fastener can pass through the second mounting hole 431 and be threadedly connected with the fixing seat 500. In addition, a second positioning column 541 is provided in the second plug part 540, and a second positioning hole 432 that matches with the second positioning column 541 is provided on the second plug plate 430, so that the two are first positioned and then strengthened and fixed by the fastener.

[0089] More specifically, the number of the first plugging plates 330 and the number of the first plugging parts 530 are both two, and they correspond one to one. Similarly, the number of the second plugging plates 430 and the number of the second plugging parts 540 are both two, and they correspond one to one.

[0090] To summarize, the emission protection device 110 is sleeved inside the first sleeve device 300, the detection light receiving mechanism 200 is sleeved inside the second sleeve device 400, and the first sleeve device 300 and the second sleeve device 400 are fixed on the fixing seat 500 so that the detection light emitting mechanism 100 and the detection light receiving mechanism 200 are arranged at an angle, wherein the detection light emitting mechanism 100 emits detection light, and the detection light receiving mechanism 200 is used to receive the detection light after refraction by the smoke to be measured, so as to obtain the concentration of the smoke to be measured. In the structure of the transmitting protection device 110, the area formed by the projections of the first recess 11221 and the second recess 11231 on the first baffle 1121 surrounds the second through hole 11211, and the area formed by the projections of the second baffle 1122 and the third baffle 1123 on the first baffle 1121 is less than or equal to half of the area of ​​the first baffle 1121. The structure is novel, and the material cost is reduced, the weight is light, and the collimation of the detection light is effectively guaranteed. Similarly, in the structure of the receiving protection device 210, the area formed by the projections of the third recess 21221 and the fourth recess 21231 on the fourth baffle 2121 surrounds the fourth through hole 21211, and the area formed by the projections of the fifth baffle 2122 and the sixth baffle 2123 on the fourth baffle 2121 is less than or equal to half of the area of ​​the fourth baffle 2121.

[0091] The present invention also provides a range hood, comprising the smoke detector of the above embodiment. The range hood adopts the smoke detector of the above embodiment, so the beneficial effects of the range hood brought by the smoke detector refer to the above embodiment.

[0092] The range hood also includes a fan, and the smoke detector is located at the air inlet of the fan, and is used to detect the concentration of smoke, and then control the speed of the fan. For example, when the smoke concentration exceeds a threshold, the fan is controlled to start. For example, when the smoke is large, the fan speed is increased.

[0093] In addition, those skilled in the art may also change the shape, structure and material of the transmitting protection device 110 and the receiving protection device 210 according to actual conditions. As long as, on the basis of the above disclosure of the present invention, the same or similar technical solutions as the present invention are adopted, the same or similar technical problems as the present invention are solved, and the same or similar technical effects as the present invention are achieved, they are all within the protection scope of the present invention, and the specific implementation methods of the present invention are not limited to this.

[0094] That is to say, as long as, on the basis of the above disclosure of the present invention, the same or similar technical solutions as the present invention are adopted, the same or similar technical problems as the present invention are solved, and the same or similar technical effects as the present invention are achieved, they all fall within the protection scope of the present invention, and the specific implementation methods of the present invention are not limited to this.

[0095] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0096] It should be understood by those skilled in the art that the embodiments of the present invention described above and shown in the accompanying drawings are only examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functional and structural principles of the present invention have been demonstrated and explained in the embodiments, and the embodiments of the present invention may be deformed or modified in any way without departing from the principles.

Claims

1. A smoke detector, characterized in that: include: A detection light emitting mechanism, comprising an emission protection device and a light emitting device, the emission protection device comprising an emission fixing piece and an emission straightening piece, the two ends of the emission fixing piece are respectively an emission closed end and an emission open end, the light emitting device is installed in the emission fixing piece through the emission open end, a first through hole is provided on the emission closed end so that the detection light emitted by the light emitting device can pass through, the emission straightening piece comprises a first baffle, a second baffle and a third baffle, the first baffle is located at one side of the emission closed end, and a second through hole opposite to the first through hole is provided on the first baffle, the second baffle is located between the emission closed end and the first baffle, and a first recess opposite to the second through hole is provided on the second baffle, the third baffle is located on the side of the first baffle away from the second baffle, and a second recess opposite to the second through hole is provided on the third baffle, wherein the areas formed by the projections of the first recess and the second recess on the first baffle respectively surround the second through hole; A detection light receiving mechanism comprises a receiving protection device and a light receiving device, the receiving protection device comprises a receiving fixture and a receiving straightening member, the two ends of the receiving fixture are a receiving closed end and a receiving open end respectively, the light receiving device is installed in the receiving fixture through the receiving open end, a third through hole is provided on the receiving closed end so that the light receiving device can receive the light refracted by the smoke to be detected, the receiving straightening member comprises a fourth baffle, a fifth baffle and a sixth baffle, the fourth baffle is located at one side of the receiving closed end, a fourth through hole opposite to the third through hole is provided on the fourth baffle, the fifth baffle is located between the receiving closed end and the fourth baffle, a third recess opposite to the fourth through hole is provided on the fifth baffle, the sixth baffle is located on the side of the fourth baffle away from the fifth baffle, a fourth recess opposite to the fourth through hole is provided on the sixth baffle, wherein the areas formed by the projections of the third recess and the fourth recess on the fourth baffle respectively surround the fourth through hole.

2. The smoke detector according to claim 1, characterized in that The receiving and straightening member further includes a seventh baffle, the seventh baffle is located between the fourth baffle and the sixth baffle, and a fifth recessed portion opposite to the fourth through hole is disposed on the seventh baffle.

3. The smoke detector according to claim 2, characterized in that The areas of the regions formed by the projections of the second baffle and the third baffle on the first baffle are both less than or equal to half of the area of ​​the first baffle; The areas of the regions formed by the projections of the fifth baffle, the sixth baffle and the seventh baffle on the fourth baffle are all smaller than or equal to half of the area of ​​the fourth baffle.

4. The smoke detector according to claim 2, characterized in that The emission straightening part also includes a first support portion and a second support portion, the first support portion extends along the edge of the emission closed end to the edge of the first baffle, the second baffle is arranged on the first support portion, the second support portion extends along the edge of the first baffle to the edge of the third baffle, and the first support portion and the second support portion are both arc-shaped.

5. The smoke detector according to claim 2, characterized in that The receiving and straightening member also includes a third support portion and a fourth support portion, the third support portion extends along the edge of the receiving closed end to the edge of the fourth baffle, the fifth baffle is arranged on the third support portion, the fourth support portion extends from the edge of the fourth baffle to the sixth baffle, the seventh baffle is installed on the fourth support portion, and the third support portion and the fourth support portion are both arc-shaped.

6. The smoke detector according to claim 1, characterized in that Also includes: The first sleeve device comprises a first cylinder, one end of the first cylinder is closed and the other end is open, the detection light emitting mechanism is inserted into the first cylinder through the open end, a fifth through hole is formed on the closed end of the first cylinder, and the fifth through hole is coaxial with the second through hole; The second sleeve device includes a second cylinder, one end of which is closed and the other end is open. The detection light receiving mechanism is inserted into the interior of the second cylinder through the open end. A sixth through hole is opened on the closed end of the second cylinder. The sixth through hole is coaxial with the fourth through hole so that the light refracted by the smoke to be detected can pass through the sixth through hole.

7. The smoke detector according to claim 6, characterized in that It also includes a fixing seat, and the first sleeve device and the second sleeve device are installed on the fixing seat.

8. The smoke detector according to claim 7, characterized in that The first sleeve device also includes a first insert tube, which is connected to the first cylinder and the two are set at an angle. The second sleeve device also includes a second insert tube, which is connected to the second cylinder and the two are set at an angle, wherein the first insert tube and the second insert tube are respectively inserted into the fixing seat.

9. The smoke detector according to claim 8, characterized in that First plug plates are respectively arranged on both sides of the first plug pipe, and a first plug portion cooperating with the first plug plates is arranged on the fixing seat and connected by fasteners; Second plug plates are respectively arranged on both sides of the second plug pipe, and a second plug portion matching with the second plug plates is arranged on the fixing seat and connected by fasteners.

10. A range hood, comprising the smoke detector according to any one of claims 1 to 9; It also includes a fan, and the smoke detector is used to detect the smoke concentration and control the fan speed according to the smoke concentration.

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