Range hood

Abstract

The utility model discloses a range hood which comprises a main machine body, a first detection hole and a second detection hole, the telescopic panel assembly is driven by the driving assembly and slidably connected into the telescopic inner cavity, and a first detection hole is formed in the top of the telescopic panel assembly; the PM2.5 detection unit is arranged in the mounting cavity of the telescopic panel assembly; compared with the prior art, the range hood has the advantages that the telescopic panel assembly extends out of the telescopic inner cavity; the PM2.5 detection unit is communicated with the outside through the first detection hole, external air can enter the PM2.5 detection unit through the first detection hole, and the PM2.5 detection unit can detect the content of PM2.5 in gas in the cooking environment in real time; when the telescopic panel assembly retracts into the telescopic inner cavity, the PM2.5 detection unit is communicated with the second detection hole through the first detection hole, the second detection hole is communicated with the outside, the PM2.5 detection unit continues to detect the PM2.5 content in the ambient air, oil smoke can be prevented from flowing backwards and being not perceived by a user, and the ambient air quality is guaranteed.

Description

Technical Field

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

[0002] In daily life, range hoods have entered the kitchens of thousands of households, solving the problem of oil fume in the kitchen for users; with the improvement of living standards, the PM2.5 index has become a health indicator, and users' requirements for range hoods are not just basic oil fume removal. How to improve the intelligence of range hoods to ensure the health of cooking personnel has become an urgent problem to be solved. In order to save kitchen space, the existing range hoods are equipped with a telescopic panel assembly. The range hood is arranged on the telescopic panel assembly. When the user is cooking, the exhaust fan of the range hood works, and the telescopic panel assembly extends out of the telescopic cavity. The range hood extends out of the telescopic cavity with the telescopic panel assembly and detects the air quality of the cooking environment. However, after cooking, the telescopic panel assembly retracts out of the telescopic cavity, and the range hood cannot detect the PM2.5 content in the ambient air. When oil fume flows back, the user cannot get a prompt. Utility Model Content

[0003] The purpose of the utility model is to provide a range hood and an integral cabinet having the same, which are used to solve the above-mentioned technical problems.

[0004] A range hood, comprising:

[0005] A main body, which has a telescopic inner cavity, and a second detection hole is provided on the top of the telescopic inner cavity;

[0006] A telescopic panel assembly is slidably connected in the telescopic inner cavity and has a first detection hole on the top;

[0007] A PM2.5 detection unit, which is disposed in the mounting cavity of the telescopic panel assembly;

[0008] A driving assembly, which is disposed in the telescopic inner cavity and connected to the telescopic panel assembly, and is used to drive the telescopic panel assembly to extend or retract into the telescopic inner cavity;

[0009] Among them, when the telescopic panel assembly extends out of the telescopic inner cavity, the PM2.5 detection unit is connected to the outside through the first detection hole; when the telescopic panel assembly retracts into the telescopic inner cavity, the PM2.5 detection unit is connected to the second detection hole through the first detection hole, and the second detection hole is connected to the outside.

[0010] According to one embodiment of the utility model, when the telescopic panel assembly extends out of the telescopic inner cavity, the second detection hole is sealed; when the telescopic panel assembly retracts into the telescopic inner cavity, the second detection hole is opened and connected to the outside, and the first detection hole is connected to the second detection hole.

[0011] According to one embodiment of the utility model, a detection hole switch assembly is provided in the telescopic inner cavity. When the telescopic panel assembly extends out of the telescopic inner cavity, the detection hole switch assembly seals the second detection hole; when the telescopic panel assembly retracts into the telescopic inner cavity, the detection hole switch assembly opens the second detection hole and connects the second detection hole with the first detection hole.

[0012] According to one embodiment of the utility model, the detection hole switch assembly includes a switch seat, an extension seat, a switch slider and an extension seat spring. The switch seat is provided with an airway aligned with the second detection hole, the extension seat is provided with an extension airway connected to the airway, an extension seat spring is provided between the extension seat and the switch seat, and the rear end of the switch slider is connected to the switch slider spring; when the telescopic panel assembly extends out of the telescopic inner cavity, the switch slider acts on the extension seat and seals the airway, and the extension seat spring is compressed; when the telescopic panel assembly retracts into the telescopic inner cavity, the switch slider leaves the extension seat and opens the airway, the switch slider spring is compressed, the extension seat spring is reset and drives the extension seat to move downward, and the second detection hole is connected to the first detection hole through the airway and the extension airway.

[0013] According to one embodiment of the utility model, the air duct includes an air inlet duct and an exhaust duct which are aligned with the second detection hole at the same time, and the extended air duct includes an air inlet extension duct and an exhaust extension duct which are respectively connected to the air inlet duct and the exhaust duct, and when the telescopic panel assembly retracts the telescopic inner cavity and squeezes the switch slider backward, the switch slider leaves the extension seat and opens the air inlet duct and the exhaust duct, and the extension seat spring resets and drives the air inlet extension duct and the exhaust extension duct to slide downward along the air inlet duct and the exhaust duct and abut against the second detection hole.

[0014] According to one embodiment of the utility model, a first notch is provided on the rear wall surface of the air inlet duct, and a second notch is provided on the rear wall surface of the exhaust duct; a first sealing plate, a second sealing plate and a first starting member are extended forward on the front wall surface of the switch slider; when the switch slider acts on the extension seat, the first sealing plate extends into the air inlet duct through the first notch and seals the air inlet duct, and the second sealing plate enters the exhaust duct through the second notch and seals the exhaust duct, and the first starting member acts on the extension seat and compresses the extension seat spring; when the switch slider is pushed and moved away from the user side by the rear wall surface of the telescopic panel assembly, the first starting member leaves the extension seat, the first sealing plate and the second sealing plate withdraw from the air inlet duct and the exhaust duct, the switch slider spring is compressed, the extension seat spring resets and drives the air inlet extension duct and the exhaust extension duct to slide upward.

[0015] According to one embodiment of the utility model, extension seat spring sliding grooves are provided on both sides of the extension seat, an extension seat spring seat corresponding to the extension seat spring sliding groove is provided on the switch seat, the extension seat spring is connected to the extension seat spring seat, and the extension seat spring seat is slidably connected to the extension seat spring sliding groove.

[0016] According to one embodiment of the utility model, a sealing component is also included, the first detection hole is located on the front side of the sealing component, and the sealing component is used to seal at least the gap between the lower surface of the telescopic panel assembly and the opening of the telescopic inner cavity when the telescopic panel assembly extends out of the telescopic inner cavity.

[0017] According to one embodiment of the utility model, the PM2.5 detection unit includes a detection shell and a PM2.5 detection component arranged in the detection shell. The detection shell is provided with a detection air intake channel and a detection exhaust channel which are independent of each other. The openings of the detection air intake channel and the detection exhaust channel abut the top surface of the telescopic panel assembly and are aligned with the first detection hole. The air intake side of the PM2.5 detection component is connected to the detection air intake channel, and the exhaust side of the PM2.5 detection component is connected to the detection exhaust channel.

[0018] According to one embodiment of the utility model, the main body includes a frame assembly and a cover assembly, the cover assembly is connected to the frame assembly, and a telescopic inner cavity is formed therebetween. The main body also includes an air collecting box assembly, and a smoke exhaust fan is provided in the air collecting box assembly. The smoke exhaust fan, a PM2.5 detection unit and a drive assembly are connected to the control system of the smoke exhaust fan, and the control system links the smoke exhaust fan and the PM2.5 detection unit.

[0019] Compared with the prior art, the range hood of the present invention has the following advantages:

[0020] In the range hood of the utility model, when the telescopic panel assembly extends out of the telescopic inner cavity, the first detection hole is connected with the outside, and the outside air can enter the PM2.5 detection unit through the first detection hole. The PM2.5 detection unit can detect the PM2.5 content in the air in the cooking environment in real time to clearly understand the purification effect of the smoke exhaust fan on the oil fume when the range hood is working, thereby providing users with a healthy cooking environment; when the telescopic panel assembly is retracted into the telescopic inner cavity, the PM2.5 detection unit is connected with the second detection hole through the first detection hole, and the second detection hole is connected with the outside, and the PM2.5 detection unit continues to detect the PM2.5 content in the ambient air, thereby preventing the backflow of oil fume without being noticed by the user, thereby ensuring the quality of ambient air. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is an exploded view of the range hood of the utility model;

[0022] Figure 2 for Figure 1 An exploded view of the PM2.5 detection unit;

[0023] Figure 3 for Figure 1 A schematic diagram of the structure of the middle detection hole switch assembly;

[0024] Figure 4 for Figure 3 Exploded view of the middle detection hole switch assembly;

[0025] Figure 5 It is a cross-sectional view of the telescopic panel assembly of the range hood of the utility model after it is retracted into the telescopic inner cavity;

[0026] Figure 6 It is a cross-sectional view of the telescopic panel assembly of the range hood of the utility model after extending out of the telescopic inner cavity;

[0027] Figure 7 for Figure 5 A partial enlarged view of middle A;

[0028] Figure 8 for Figure 6 A partial enlarged view of B in the middle;

[0029] In the figure: a. telescopic inner cavity, a1. second detection hole, 1. telescopic panel assembly, 11. first detection hole, 2. PM2.5 detection unit, 21. detection shell, 211. detection air intake channel, 212. detection exhaust channel, 22. PM2.5 detection part, 3. detection hole switch assembly, 31. switch seat, 311. air intake channel, 3111. first notch, 312. exhaust channel, 3121. second notch, 313. first front and rear slide grooves, 314. front and rear guide blocks, 315. extension seat spring seat, 3151. extension seat limit block, 32. extension Seat, 321. Inlet extension duct, 322. Exhaust extension duct, 323. Second starting member, 324. Extension seat spring sliding groove, 3241. Extension seat limiting groove, 33. Switch slider, 331. First sealing plate, 332. Second sealing plate, 333. First starting member, 334. Front and rear guide grooves, 34. Extension seat spring, 35. Switch slider spring, 36. Sealing sponge, 4. Sealing assembly, 41. First sealing strip, 42. Second sealing strip, 5. Drive assembly, 6. Frame assembly, 7. Cover assembly, 8. Wind box assembly, 81. Smoke exhaust fan.

[0030] The realization of the functions and advantages of the utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0031] The following will disclose multiple embodiments of the present invention with drawings. For the purpose of clear description, many practical details will be described together in the following description. However, it should be understood that these practical details should not be used to limit the present invention. In other words, in some embodiments of the present invention, these practical details are not necessary. In addition, in order to simplify the drawings, some conventional structures and components will be depicted in a simple schematic manner in the drawings.

[0032] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0033] In addition, in the present utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present utility model. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0034] In order to further understand the content, features and effects of the present invention, the following embodiments are given as examples and described in detail with reference to the accompanying drawings:

[0035] See also Figures 1 to 8The utility model discloses a range hood, which comprises a main body, a telescopic panel assembly 1, a PM2.5 detection unit 2 and a driving assembly. The main body has a telescopic inner cavity a, a second detection hole a1 is provided at the top of the telescopic inner cavity, the telescopic panel assembly 1 is slidably connected in the telescopic inner cavity a, a first detection hole 11 is provided at the top, and a second detection hole a1 is provided at the bottom; the PM2.5 detection unit 2 is arranged in the installation cavity of the telescopic panel assembly 1; the driving assembly 5 is arranged in the telescopic inner cavity a and connected to the telescopic panel assembly 1, and is used to drive the telescopic panel assembly 1 to extend or retract into the telescopic inner cavity a; wherein, when the telescopic panel assembly 1 extends out of the telescopic inner cavity a, the PM2.5 detection unit 2 is connected to the outside through the first detection hole 11; when the telescopic panel assembly 1 retracts into the telescopic inner cavity a, the PM2.5 detection unit 2 is connected to the second detection hole a1 through the first detection hole 11, and the second detection hole a1 is connected to the outside. The range hood of the present invention, when the range hood is working, the driving component 5 drives the telescopic panel component 1 to extend out from the telescopic inner cavity a, and the first detection hole 11 is connected to the outside, and the outside air can enter the PM2.5 detection unit 2 through the first detection hole 11 and be detected by the PM2.5 detection unit 2. The result of the detection by the PM2.5 detection unit 2 is the content of PM2.5 in the air of the cooking environment after the range hood is working and the oil smoke in the cooking environment is sucked. Through the PM2.5 content value, the user can clearly understand the purification effect of the range hood on the oil smoke, and when the PM2.5 detection unit 2 is linked with the control system of the range hood, when the PM2.5 content detected by the PM2.5 detection unit 2 exceeds the standard, the control system of the range hood automatically increases the power of the exhaust fan 81 of the range hood to extract and discharge the oil smoke as quickly as possible, so as to reduce the PM2.5 content in the air of the cooking environment, so that the user has a healthy cooking environment; the user cooks After the end, the smoke exhaust fan 81 of the range hood is turned off, the driving component 5 drives the telescopic panel component 1 to retract the telescopic inner cavity a, the PM2.5 detection unit 2 is connected with the second detection hole a1 through the first detection hole 11, the second detection hole a1 is connected with the outside, and the outside air can enter the PM2.5 detection unit 2 through the second detection hole a1, and the PM2.5 detection unit 2 continues to detect the PM2.5 content in the ambient air outside the telescopic inner cavity a, which can avoid the backflow of oil smoke without being noticed by the user, thereby ensuring the quality of ambient air; when the PM2.5 content in the air outside the telescopic inner cavity a detected by the PM2.5 detection unit 2 exceeds the standard, the control system of the range hood will start the smoke exhaust fan 81 of the range hood again, and make the smoke exhaust fan 81 suck the air in the environment, and when the PM2.5 content in the ambient air detected by the PM2.5 detection unit 2 reaches the standard value, the control system of the range hood will turn off the smoke exhaust fan 81 again.

[0036] See also Figure 6 and Figure 8In the range hood of the present invention, when the telescopic panel assembly 1 extends out of the telescopic inner cavity a, the second detection hole a1 is sealed; when the telescopic panel assembly 1 retracts into the telescopic inner cavity a, the second detection hole a1 is opened and connected to the outside, and the first detection hole 11 is connected to the second detection hole a1. When the smoke exhaust fan 81 of the range hood is started, the driving assembly 5 drives the telescopic panel assembly 1 to extend out of the telescopic inner cavity a. If the second detection hole a1 is in an open state, the air in the cooking environment will enter the telescopic inner cavity a through the second detection hole a1. If the air in the cooking environment contains oil smoke, the oil smoke will pollute the telescopic inner cavity a. Therefore, when the telescopic panel assembly 1 extends out of the telescopic inner cavity a, the second detection hole a1 is sealed, and the air in the cooking environment cannot enter the telescopic inner cavity a through the second detection hole a1. At this time, the air detected by the PM2.5 detection unit 2 comes from the air in the cooking environment that enters through the first detection hole 11. This air is the purified air when the range hood is working. The PM2.5 content value in this air can actually reflect the air quality of the cooking environment and give The control system of the range hood controls the power of the smoke exhaust fan to provide a basis; and when the driving component 5 drives the telescopic panel component 1 to retract the telescopic inner cavity a, the second detection hole a1 is opened and connected to the outside, the first detection hole 11 is connected to the second detection hole a1, and the air detected by the PM2.5 detection unit 2 comes from the air of the environment outside the telescopic inner cavity a. The PM2.5 content value in the air is the PM2.5 content in the ambient air after the range hood is turned off. When the user is not cooking and the PM2.5 content in the ambient air exceeds the standard, it indicates that there is a possibility of backflow of oil smoke, or other factors affect the ambient air quality. At this time, the control system of the range hood will start the smoke exhaust fan 81 of the range hood again, and make the smoke exhaust fan 81 purify the ambient air.

[0037] See also Figure 1 , Figure 5 and Figure 6In the range hood of the present invention, a detection hole switch assembly 3 is provided in the telescopic inner cavity a. When the telescopic panel assembly 1 extends out of the telescopic inner cavity a, the detection hole switch assembly 3 seals the second detection hole a1. When the telescopic panel assembly 1 retracts into the telescopic inner cavity a, the detection hole switch assembly 3 opens the second detection hole a1 and connects the second detection hole a1 with the first detection hole 11. When the telescopic panel assembly 1 retracts into the telescopic inner cavity, if the detection hole switch assembly 3 only opens the second detection hole a1, but does not directly connect the second detection hole a1 with the first detection hole 11, when the PM2.5 detection unit 2 is started, the PM2.5 detection unit 2 first draws the air in the telescopic inner cavity a. It takes a certain amount of time for the external air to enter the telescopic inner cavity a through the second detection hole a1. The detection result of the PM2.5 detection unit 2 has a lag and may have an error with the detection result when the PM2.5 detector is directly used to detect the air quality in the environment. In order to make the PM2.5 detection unit 2 detect the air quality when the telescopic panel assembly 1 retracts into the telescopic inner cavity a, the PM2.5 detection unit 2 will detect the air quality when the PM2.5 detection unit 2 is activated. The PM2.5 detection unit 2 can still detect the ambient air quality in real time. The range hood of the utility model is provided with a detection hole switch assembly 3 that directly connects the second detection hole a1 and the first detection hole 11. In this way, when the PM2.5 detection unit 2 is started, the external air enters the detection hole switch assembly 3 through the second detection hole a1, and then enters the first detection hole 11 through the detection hole switch assembly 3, and then enters the PM2.5 detection unit 2 from the first detection hole 11 and is detected. The PM2.5 detection unit 2 detects the air outside the telescopic inner cavity a when the telescopic panel assembly 1 retracts the telescopic inner cavity a. The detection result truly reflects the ambient air quality.

[0038] See also Figures 3 to 8In the range hood of the present invention, the detection hole switch assembly 3 includes a switch seat 31, an extension seat 32, a switch slider 33 and an extension seat spring 34. The switch seat 31 is provided with an airway aligned with the second detection hole a1, the extension seat 32 is provided with an extension airway sleeved with the airway, an extension seat spring 34 is provided between the extension seat 32 and the switch seat 31, and a switch slider spring 35 is connected to the rear end of the switch slider 33; when the switch slider 33 acts on the extension seat 32 and seals the airway, the extension seat spring 34 is compressed; when the switch slider 33 leaves the extension seat 32 and opens the airway, the switch slider spring 35 is compressed, the extension seat spring 34 is reset and drives the extension seat 32 to move downward, and the second detection hole a1 is connected to the first detection hole 11 through the airway and the extension airway. When the telescopic panel assembly 1 moves into the telescopic inner cavity a, the rear wall of the telescopic panel assembly 1 acts on the switch slider 33 and pushes the switch slider 33 to move away from the user side. When the switch slider 33 moves away from the user side, the switch slider 33 opens the airway, and at the same time, the switch slider 33 compresses the switch slider spring 35 backwards. After the telescopic panel assembly 1 is completely retracted into the telescopic inner cavity a, the switch slider 33 completely leaves the extension seat 32, and the airway on the switch seat 31 is opened. The extension seat 32 moves downward under the action of the extension seat spring 34, so that the extended airway descends along the airway and abuts against the top of the telescopic panel assembly 1, and the extended airway is aligned with the first detection hole 11. At this time The second detection hole a1, the airway, the extended airway and the first detection hole 11 are connected in sequence, and the external air passes through the second detection hole a1, the airway, the extended airway and the first detection hole 11 in sequence and enters the PM2.5 detection unit 2; when the telescopic panel assembly 1 extends out of the telescopic inner cavity a, the action of the rear wall of the telescopic panel assembly 1 on the switch slider 33 disappears, the switch slider spring 35 resets and pushes the switch slider 33 to move toward the user side, the switch slider 33 acts on the extension seat 32 again and presses the extension seat 32 upward, the extension seat spring 34 is compressed, and when the telescopic panel assembly 1 is fully extended out of the telescopic inner cavity a, the extension seat spring 34 is fully reset, and the switch slider 33 seals the airway.

[0039] See also Figures 3 to 8In the range hood of the utility model, the air duct includes an air inlet duct 311 and an exhaust duct 312 which are aligned with the second detection hole a1 at the same time, and the extended air duct includes an air inlet extension duct 321 and an exhaust extension duct 322 which are respectively sleeved with the air inlet duct 311 and the exhaust duct 312. When the telescopic panel assembly 1 retracts the telescopic inner cavity a and squeezes the switch slider 33 backward, the switch slider 33 leaves the extension seat 32 and opens the air inlet duct 311 and the exhaust duct 312. The extension seat spring 34 resets and drives the air inlet extension duct 321 and the exhaust extension duct 322 to slide downward along the air inlet duct 311 and the exhaust duct 312 and abut against the second detection hole a1. The air duct is divided into an air intake duct 311 and an exhaust duct 312, and the extended air duct is divided into an air intake extension duct 321 and an exhaust extension duct 322. The air intake duct 311 is connected to the air intake extension duct 321, and the exhaust duct 312 is connected to the exhaust extension duct 322. When the switch slider 33 leaves the extension seat 32, its extended air duct moves downward and abuts against the top of the telescopic panel assembly 1, the air intake extension duct 321 is aligned with part of the first detection hole 11, and the exhaust extension duct 322 is aligned with another part of the first detection hole 11. In this way, when the PM2.5 detection unit 2 is working, part of the air enters the air intake duct 311 through the part of the second detection hole a1 that is aligned with the air intake duct 311, flows along the air intake duct 311 and enters the air intake extension duct 322. 1, then enters the first detection hole 11 and the part aligned with the intake extension duct 321 through the intake extension duct 321, then enters the PM2.5 detection unit 2 through the first detection hole 11, and after being detected by the PM2.5 detection unit 2, it is discharged into the exhaust extension duct 322 through the exhaust extension duct 322 and the part aligned with the first detection hole 11, and then enters the exhaust duct 312 through the exhaust extension duct 322, and finally discharged from the part aligned with the exhaust duct 312 through the second detection hole a1, which can separate the channel of the airflow entering the PM2.5 detection unit 2 from the channel of the airflow discharged from the PM2.5 detection unit 2, so that the PM2.5 detection unit 2 detects the real-time ambient air, and the detection result is more meaningful for reference. When the telescopic panel assembly 1 extends out of the telescopic inner cavity a, the switch slider spring 35 pushes the switch slider 33 to move toward the user side, and presses the extension seat 32 upward, and the extension airway moves upward along the airway and leaves the top of the telescopic panel assembly 1. When the telescopic panel assembly 1 leaves the telescopic inner cavity a, it will not interfere with the movement of the telescopic panel assembly 1.

[0040] See also Figures 3 to 8In the range hood of the utility model, the rear side wall of the air inlet duct 311 is provided with a first notch 3111, and the rear side wall of the exhaust duct 312 is provided with a second notch 3121; the front side wall of the switch slider 33 is provided with a first sealing plate 331, a second sealing plate 332 and a first starting member 333 extending forward; when the switch slider 33 acts on the extension seat 32, the first sealing plate 331 extends into the air inlet duct 311 through the first notch 3111 and seals the air inlet duct 311, and the second sealing plate 332 enters the exhaust duct through the second notch 3121 312 and seals the exhaust duct 312, the first starting member 333 acts on the extension seat 32 and compresses the extension seat spring 34; when the switch slider 33 is pushed and moved by the rear side wall of the telescopic panel assembly 1 facing away from the user side, the first starting member 333 leaves the extension seat 32, the first sealing plate 331 and the second sealing plate 332 withdraw from the inlet duct 311 and the exhaust duct 312, the switch slider spring 35 is compressed, the extension seat spring 34 resets and drives the inlet extension duct 321 and the exhaust extension duct 322 to slide downward.When the telescopic panel assembly 1 extends out of the telescopic inner cavity a, the switch slider spring 35 is reset and pushes the switch slider 33 to move toward the user side, so that the switch slider 33 acts on the extension seat 32, the first sealing plate 331 extends into the air inlet 311 through the first notch 3111 and seals the air inlet 311, the second sealing plate 332 enters the exhaust duct 312 through the second notch 3121 and seals the exhaust duct 312, the first starting member 333 acts on the extension seat 32 and compresses the extension seat spring 34, at this time, the external air passes through the telescopic panel assembly 1, The first detection hole 11 at the top portion enters the PM2.5 detection unit 2; when the telescopic panel assembly 1 retracts the telescopic inner cavity a, the rear wall surface of the telescopic panel assembly 1 acts on the switch slider 33 and applies a force away from the user side to the switch slider 33, the switch slider 33 is driven and retreats, the first starting member 333 leaves the extension seat 32, the first sealing plate 331 and the second sealing plate 332 withdraw from the inlet duct 311 and the exhaust duct 312, the switch slider spring 35 is compressed, the extension seat spring 34 is reset, and the inlet extension duct 311 is driven to extend. 21 and the exhaust extension channel 322 slide downward along the air inlet channel 311 and the exhaust channel 312, the air inlet extension channel 321 and the exhaust extension channel 322 abut against the top of the telescopic panel assembly 1 and align with the first detection hole 11 on the top of the telescopic panel assembly 1. When the PM2.5 detection unit 2 located in the installation cavity of the telescopic panel assembly 1 is working, the external air enters the air inlet channel 311 through the second detection hole a1 at the top of the telescopic inner cavity a and the part aligned with the air inlet channel 311, and then enters the air inlet extension channel 321 along the air inlet channel 311, and then enters the air inlet extension channel 321 along the air inlet channel 311. The air flows through the intake extension duct 321 and enters the PM2.5 detection unit 2 through the first detection hole 11 at the top of the telescopic panel assembly 1 and the part that is aligned with the intake extension duct 321. After being detected by the PM2.5 detection unit 2, the air enters the exhaust extension duct 322 through the first detection hole 11 at the top of the telescopic panel assembly 1 and the part that is aligned with the exhaust extension duct 322. The air flows along the exhaust extension duct 322 and enters the exhaust duct 312 through the exhaust extension duct 322. Finally, the air is discharged from the part that is aligned with the exhaust duct 312 through the second detection hole a1 at the top of the telescopic inner cavity a.

[0041] See also Figure 3 and Figure 4In the range hood of the present invention, the rear wall of the extension seat 32 is provided with a second actuating member 323, the second actuating member 323 has an inclined surface facing the switch slider 33, the inclined surface is arranged upwardly inclined from the side away from the switch slider 33 to the side close to the switch slider 33, the first actuating member 333 has an inclined surface facing the second actuating member 323, and the inclined direction of the inclined surface on the first actuating member 333 is opposite to the inclined direction of the inclined surface on the second actuating member 323. When the telescopic panel assembly 1 extends out of the telescopic inner cavity a, the force exerted on the switch slider 33 by the rear wall of the telescopic panel assembly 1 disappears, and when the switch slider spring 35 is reset and pushes the switch slider 33 to slide toward the user side, the inclined surface of the first actuating member 333 slides along the inclined surface of the second actuating member 323 and moves the extension seat 32 upward, the extension seat 32 leaves the bottom of the telescopic panel assembly 1 and compresses the extension seat spring 34 upward.

[0042] See also Figure 3 and Figure 4 In the range hood of the present invention, the left and right sides of the switch base 31 are provided with first front and rear slide grooves 313, and the outer sides of the first sealing plate 331 and the second sealing plate 332 are respectively slidably connected to the first front and rear slide grooves 313 on the corresponding sides. When the telescopic panel assembly 1 extends out of the telescopic inner cavity a, the force exerted by the telescopic panel assembly 1 on the switch slider 33 disappears, and when the switch slider spring 35 is reset and pushes the switch slider 33 to slide toward the user side, the first sealing plate 331 and the second sealing plate 332 slide along the first front and rear slide grooves 313 on the corresponding sides, which can avoid the movement direction of the switch slider 33 from being offset, and ensure the linear movement of the switch slider 33.

[0043] See also Figure 3 and Figure 4 In the range hood of the present invention, a front-to-back guide groove 334 is formed between the first sealing plate 331 and the second sealing plate 332. The switch seat 31 is provided with a front-to-back guide block 314 located between the air inlet duct 311 and the exhaust duct 312. The front-to-back guide block 314 is slidably connected in the front-to-back guide groove 334. When the telescopic panel assembly 1 extends out of the telescopic inner cavity a, the force exerted on the switch slider 33 by the rear wall of the telescopic panel assembly 1 disappears. When the switch slider spring 35 is reset and pushes the switch slider 33 to slide toward the user side, the first sealing plate 331 and the second sealing plate 332 slide along the first front-to-back slide groove 313 on the corresponding side, and at the same time, the front-to-back guide block 314 slides along the front-to-back guide groove 334, which can avoid the movement direction of the switch slider 33 from being offset and ensure the linear movement of the switch slider 33. And because the air inlet duct 311 and the exhaust duct 312 are independent of each other, a front and rear guide groove 334 must be formed between the first sealing plate 331 and the second sealing plate 332 so that the first sealing plate 331 and the second sealing plate 332 can seal or open the air inlet duct 311 and the exhaust duct 312 respectively.

[0044] See also Figure 3and Figure 4 In the range hood of the present invention, both sides of the extension seat 32 are provided with extension seat spring sliding grooves 324, and the switch seat 31 is provided with an extension seat spring seat 315 corresponding to the extension seat spring sliding grooves 324, and the extension seat spring 34 is connected to the extension seat spring seat 315, and the extension seat spring seat 315 is slidably connected to the extension seat spring sliding grooves 324. When the switch slider 33 acts on the extension seat 32, the air intake extension channel 321 and the exhaust extension channel 322 slide upward along the air intake channel 311 and the exhaust channel 312, and the extension seat spring sliding groove 324 slides along the extension seat spring seat 315 and compresses the extension seat spring 34 upward. Under the limiting action of the extension seat spring sliding groove 324 and the extension seat spring seat 315, the extension seat spring 34 can only be deformed in the vertical direction in the lower extension seat spring sliding groove 324 and the extension seat spring seat 315, but cannot be twisted.

[0045] See also Figure 3 and Figure 4 In the range hood of the present invention, an extension seat limiting groove 3241 is provided on the side wall of the extension seat spring sliding groove 324, and an extension seat limiting block 3151 is provided on the extension seat spring seat 315, and the extension seat limiting block 3151 is slidably connected to the extension seat limiting groove 3241. When the switch slider 33 acts on the extension seat 32, the intake extension duct 321 and the exhaust extension duct 322 slide upward along the intake duct 311 and the exhaust duct 312, the intake extension duct 321 and the exhaust extension duct 322 slide upward along the intake duct 311 and the exhaust duct 312, the extension seat limit block 3151 slides along the extension seat limit groove 3241, and the extension seat spring 34 is compressed; after the switch slider 33 leaves the extension seat 32, the extension seat spring 34 resets, the extension seat spring 34 pushes the extension seat 32 to move downward, and the extension seat limit block 3151 limits the extension seat spring sliding groove 324 through the extension seat limit groove 3241 to prevent the extension seat spring sliding groove 324 from detaching from the extension seat spring seat 315.

[0046] See also Figure 3 and Figure 4The sponge 36 is provided with openings corresponding to the air intake extension channel 321 and the exhaust extension channel 322. After the switch slider 33 leaves the extension seat 32, the extension seat spring 34 is reset and pushes the extension seat 32 to move downward. When the air intake extension channel 321 and the exhaust extension channel 322 move upward along the air intake channel 311 and the exhaust channel 312 and act on the top surface of the telescopic panel assembly 1, the sealing sponge 36 is squeezed between the extension seat 32 and the top surface of the telescopic panel assembly 1, and the gap between the extension seat 32 and the top surface of the telescopic panel assembly 1 is sealed, so that the air intake can only enter the first detection hole 11 on the top surface of the telescopic panel assembly 1 through the air intake extension channel 321, and the exhaust of the PM2.5 detection unit 2 can only enter the exhaust extension channel 322 through the first detection hole 11 on the top surface of the telescopic panel assembly 1 and the part of the exhaust extension channel 322 that is aligned, and then discharged through the exhaust extension channel 322, the exhaust channel 312 and the second detection hole a1 at the top of the telescopic inner cavity in sequence.

[0047] See also Figure 1 , Figures 3 to 8 The range hood of the present invention further comprises a sealing assembly 4, wherein the first detection hole 11 is located at the front side of the sealing assembly 4, and the sealing assembly 4 is used to seal the gap between the lower surface of the telescopic panel assembly 1 and the opening of the telescopic inner cavity a when the telescopic panel assembly 1 extends out of the telescopic inner cavity a. The gap between the lower surface of the telescopic panel assembly 1 and the opening of the telescopic inner cavity a faces the cooking utensils, and when the oil smoke moves toward the air intake of the range hood, the escaping oil smoke may enter the telescopic inner cavity a through the gap between the lower surface of the telescopic panel assembly 1 and the opening of the telescopic inner cavity a. The sealing assembly 4 is provided to seal the gap between the lower surface of the telescopic panel assembly 1 and the opening of the telescopic inner cavity a, thereby preventing the oil smoke from entering the telescopic inner cavity a through the gap between the lower surface of the telescopic panel assembly 1 and the opening of the telescopic inner cavity a.

[0048] In some embodiments, the sealing assembly 4 includes a first sealing strip 41, which is located on the lower wall surface of the telescopic panel assembly 1. After the telescopic panel assembly 1 extends out of the telescopic inner cavity a, the first sealing strip 41 is squeezed by the lower edge of the opening of the telescopic inner cavity a, and the first sealing strip 41 is squeezed between the lower wall surface of the telescopic panel assembly 1 and the lower edge of the opening of the telescopic inner cavity a, thereby sealing the gap between the lower surface of the telescopic panel assembly 1 and the opening of the telescopic inner cavity a.

[0049] See also Figures 5 to 8In the illustrated embodiment, when the telescopic panel assembly 1 extends out of the telescopic inner cavity a, the sealing assembly 4 seals the front opening of the telescopic inner cavity a, and the fumes generated when the user cooks will not enter the telescopic inner cavity a through the gap between the opening of the telescopic inner cavity a and the telescopic panel assembly 1, and will not pollute the telescopic inner cavity a. The sealing assembly 4 includes a first sealing strip 41 and a second sealing strip 42. The first sealing strip 41 is located on the lower wall surface of the telescopic panel assembly 1, and the second sealing strip 42 is located on the upper wall surface of the telescopic panel assembly 1. The first detection hole 11 is located on the front side of the second sealing strip 42. After the telescopic panel assembly 1 extends out of the telescopic inner cavity a, the first detection hole 11 is located on the outside of the telescopic inner cavity a. The first sealing strip 41 is squeezed by the lower edge of the opening of the telescopic inner cavity a, and the first sealing strip 41 is squeezed between the lower wall surface of the telescopic panel assembly 1 and the lower edge of the opening of the telescopic inner cavity a. The second sealing strip 42 is squeezed by the upper edge of the opening of the telescopic inner cavity a, and the second sealing strip 42 is squeezed between the upper wall surface of the telescopic panel assembly 1 and the upper edge of the opening of the telescopic inner cavity a, thereby sealing the gap between the telescopic panel assembly 1 and the opening of the telescopic inner cavity a.

[0050] See also Figure 1 , Figure 2 , Figures 5 to 8In the range hood of the present invention, the PM2.5 detection unit 2 includes a detection shell 21 and a PM2.5 detection member 22 disposed in the detection shell 21. The detection shell 21 is provided with a detection air intake channel 211 and a detection air exhaust channel 212 that are independent of each other. The openings of the detection air intake channel 211 and the detection air exhaust channel 212 abut against the top surface of the telescopic panel assembly 1 and are aligned with the first detection hole 11. The air intake side of the PM2.5 detection member 22 is communicated with the detection air intake channel 211, and the exhaust side of the PM2.5 detection member 22 is communicated with the detection exhaust channel 212. When the range hood is working, the driving component 5 drives the telescopic panel component 1 to extend out of the telescopic inner cavity a. At this time, the first detection hole 11 is located outside the telescopic inner cavity a. The sealing component 4 seals the gap between the lower surface of the telescopic panel component 1 and the opening of the telescopic inner cavity a. When the smoke exhaust fan of the range hood is started, the PM2.5 detection component 22 detects the air above the telescopic panel component 1. The air enters the detection air inlet channel 211 through the first detection hole 11 and the part aligned with the detection air inlet channel 211. After being detected by the PM2.5 detection component 22, the air is discharged into the detection exhaust channel 212 and discharged. After the smoke exhaust fan is turned off, the driving component 5 drives the telescopic panel 1 to extend out of the telescopic inner cavity a. Component 1 retracts the telescopic inner cavity a, and the detection hole switch component 3 connects the second detection hole a1 with the first detection hole 11. After the PM2.5 detection component 22 is started, the air outside the telescopic inner cavity a passes through the second detection hole a1, the air inlet duct 311, the air inlet extension duct 321, and the second detection hole a1 in sequence and enters the opening of the detection air inlet channel 211, then flows along the detection air inlet channel 211 and is detected by the PM2.5 detection component 22. After being detected by the PM2.5 detection component 22, it is discharged into the detection exhaust channel 212, and then is discharged through the second detection hole a1, the exhaust extension duct 322, the exhaust duct 312 and the second detection hole a1 in sequence. After the telescopic panel assembly 1 is retracted into the telescopic inner cavity a, the detection hole switch assembly 3 connects the second detection hole a1 and the first detection hole 11. The air detected by the PM2.5 detection component 22 comes from above the telescopic inner cavity a. When oil fume backflow occurs, the PM2.5 detection unit 2 can promptly detect that the PM2.5 content in the air exceeds the standard, and enable the control system of the range hood to promptly start the smoke exhaust fan 81.

[0051] See also Figure 1 , Figure 5 and Figure 6The range hood of the utility model comprises a main body including a frame assembly 6 and a cover assembly 7. The frame assembly 6 is connected to the cover assembly 7 and forms a telescopic inner cavity a. The main body also comprises an air collecting box assembly 8. A smoke exhaust fan 81 is arranged in the air collecting box assembly 8. The smoke exhaust fan 81, the PM2.5 detection unit 2 and the driving assembly 5 are connected to the control system of the range hood. The control system links the smoke exhaust fan 81 and the PM2.5 detection unit 2. When the range hood is working, the smoke exhaust fan 81 of the range hood is started, and at the same time, the driving component 5 is started and drives the telescopic panel component 1 to extend out of the telescopic inner cavity a, the first detection hole 11 extends out of the telescopic inner cavity a, the sealing component 4 seals the gap between the telescopic panel component 1 and the opening of the telescopic inner cavity a, and the second detection hole a1 is sealed by the detection hole switch component 3. The oil smoke generated by cooking cannot enter the telescopic inner cavity through the gap between the telescopic panel component 1 and the opening of the telescopic inner cavity a, and the air in the cooking environment cannot enter the telescopic inner cavity a through the second detection hole a1. The air detected by the PM2.5 detection unit 2 is the air above the telescopic panel component 1. The PM2.5 content value in the air represents the escape of oil smoke when the smoke exhaust fan is started, and can truly feedback the purification effect of the smoke exhaust fan on oil smoke. The PM2.5 detection unit 2 is linked to the control system of the range hood, and the control system of the range hood can adjust the power of the smoke exhaust fan 81 according to the PM2.5 content value detected by the PM2.5 detection unit 2. When cooking is finished and the smoke exhaust fan 81 is turned off, the driving assembly 5 drives the telescopic panel assembly 1 to retract the telescopic inner cavity a, and the detection hole switch assembly 3 connects the second detection hole a1 with the first detection hole 11. The ambient air enters the first detection hole 11 through the second detection hole a1, the air inlet duct 311, and the air inlet extension duct 321, and then enters the detection air inlet channel 211 from the first detection hole 11, and is discharged into the detection exhaust channel 212 after being detected by the PM2.5 detection element 22, and then enters the exhaust extension duct 322 and the exhaust duct 312 in turn through the first detection hole 11, and is finally discharged from the second detection hole a1.

[0052] The driving component 5 of the range hood of the present invention can adopt an electric push rod, the driving end of the electric push rod is connected to the telescopic panel component 1, and the two side walls of the telescopic inner cavity a are provided with slide rail components. The two sides of the telescopic panel component 1 are connected to the movable rails of the slide rail component. When the electric push rod is started, the telescopic panel component 1 slides along the guide rail component in the telescopic inner cavity.

[0053] In other embodiments, the driving assembly 5 of the range hood of the utility model may also adopt a motor-driven screw method, the driving end of the motor is connected to the screw, a nut is connected to the screw, the nut is connected to the telescopic panel assembly 1, and the two side walls of the telescopic inner cavity a are provided with slide rail assemblies, and the two sides of the telescopic panel assembly 1 are connected to the movable rails of the slide rail assembly. When the motor is started, the screw rotates, and the screw nut slides along the screw and drives the telescopic panel assembly 1 to slide along the guide rail assembly in the telescopic inner cavity.

[0054] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions or improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A range hood, characterized in that: include: A main body, which has a telescopic inner cavity (a), and a second detection hole (a1) is provided on the top of the telescopic inner cavity; A telescopic panel assembly (1) is slidably connected in the telescopic inner cavity (a), and a first detection hole (11) is provided on the top thereof; A PM2.5 detection unit (2), which is arranged in the installation cavity of the telescopic panel assembly (1); A driving assembly (5), which is disposed in the telescopic inner cavity (a) and connected to the telescopic panel assembly (1), and is used to drive the telescopic panel assembly (1) to extend or retract into the telescopic inner cavity (a); When the telescopic panel assembly (1) extends out of the telescopic inner cavity (a), the PM2.5 detection unit (2) is connected to the outside through the first detection hole (11); when the telescopic panel assembly (1) is retracted into the telescopic inner cavity (a), the PM2.5 detection unit (2) is connected to the second detection hole (a1) through the first detection hole (11), and the second detection hole (a1) is connected to the outside.

2. The range hood according to claim 1, characterized in that: When the telescopic panel assembly (1) extends out of the telescopic inner cavity (a), the second detection hole (a1) is sealed; when the telescopic panel assembly (1) retracts into the telescopic inner cavity (a), the second detection hole (a1) is opened and connected to the outside, and the first detection hole (11) is connected to the second detection hole (a1).

3. The range hood according to claim 1, characterized in that: The telescopic inner cavity (a) is provided with a detection hole switch assembly (3); when the telescopic panel assembly (1) extends out of the telescopic inner cavity (a), the detection hole switch assembly (3) seals the second detection hole (a1); when the telescopic panel assembly (1) retracts into the telescopic inner cavity (a), the detection hole switch assembly (3) opens the second detection hole (a1) and connects the second detection hole (a1) with the first detection hole (11).

4. The range hood according to claim 3, characterized in that: The detection hole switch assembly (3) comprises a switch seat (31), an extension seat (32), a switch slider (33) and an extension seat spring (34); the switch seat (31) is provided with an air passage aligned with the second detection hole (a1); the extension seat (32) is provided with an extension air passage sleeved with the air passage; an extension seat spring (34) is provided between the extension seat (32) and the switch seat (31); and a switch slider spring (35) is connected to the rear end of the switch slider (33); when the telescopic panel assembly (1) extends out of the telescopic inner cavity (a), When the switch slider (33) acts on the extension seat (32) and seals the airway, the extension seat spring (34) is compressed; when the telescopic panel assembly (1) retracts into the telescopic inner cavity (a), the switch slider (33) leaves the extension seat (32) and opens the airway, the switch slider spring (35) is compressed, the extension seat spring (34) is reset and drives the extension seat (32) to move downward, and the second detection hole (a1) is connected to the first detection hole (11) through the airway and the extension airway.

5. The range hood according to claim 4, characterized in that: The air duct comprises an air inlet duct (311) and an exhaust duct (312) which are aligned with the second detection hole (a1) at the same time, and the extended air duct comprises an air inlet extension duct (321) and an exhaust extension duct (322) which are respectively sleeved with the air inlet duct (311) and the exhaust duct (312). When the telescopic panel assembly (1) retracts the telescopic inner cavity and presses the switch slider (33) backward, the switch slider (33) leaves the extension seat (32) and opens the air inlet duct (311) and the exhaust duct (312), and the extension seat spring (34) resets and drives the air inlet extension duct (321) and the exhaust extension duct (322) to slide downward along the air inlet duct (311) and the exhaust duct (312) and abut against the second detection hole (a1).

6. The range hood according to claim 5, characterized in that: The rear side wall of the air inlet duct (311) is provided with a first notch (3111), and the rear side wall of the air exhaust duct (312) is provided with a second notch (3121); the front side wall of the switch slider (33) is provided with a first sealing plate (331), a second sealing plate (332) and a first starting member (333) extending forward; when the switch slider (33) acts on the extension seat (32), the first sealing plate (331) extends into the air inlet duct (311) through the first notch (3111) and seals the air inlet duct (311), and the second sealing plate (332) enters the air exhaust duct (312) through the second notch (3121) and seals the air exhaust duct (312). The air passage (312) is sealed, and the first starting member (333) acts on the extension seat (32) to compress the extension seat spring (34); when the switch slider (33) is pushed and moved by the rear side wall of the telescopic panel assembly (1) facing away from the user side, the first starting member (333) leaves the extension seat (32), the first sealing plate (331) and the second sealing plate (332) withdraw from the air inlet passage (311) and the exhaust passage (312), the switch slider spring (35) is compressed, and the extension seat spring (34) is reset and drives the air inlet extension passage (321) and the exhaust extension passage (322) to slide downward.

7. The range hood according to claim 5, characterized in that: Extension seat spring sliding grooves (324) are provided on both sides of the extension seat (32); an extension seat spring seat (315) corresponding to the extension seat spring sliding groove (324) is provided on the switch seat (31); the extension seat spring (34) is connected to the extension seat spring seat (315); and the extension seat spring seat (315) is slidably connected to the extension seat spring sliding groove (324).

8. The range hood according to claim 1, characterized in that: It also includes a sealing component (4), wherein the first detection hole (11) is located on the front side of the sealing component (4), and the sealing component (4) is used to seal at least the gap between the lower surface of the telescopic panel component (1) and the opening of the telescopic inner cavity (a) when the telescopic panel component (1) extends out of the telescopic inner cavity (a).

9. The range hood according to claim 1, characterized in that: The PM2.5 detection unit (2) comprises a detection shell (21) and a PM2.5 detection component (22) disposed in the detection shell (21); the detection shell (21) is provided with a detection air intake channel (211) and a detection air exhaust channel (212) which are independent of each other; the openings of the detection air intake channel (211) and the detection air exhaust channel (212) abut against the top surface of the telescopic panel assembly (1) and are aligned with the first detection hole (11); the air intake side of the PM2.5 detection component (22) is in communication with the detection air intake channel (211); and the air exhaust side of the PM2.5 detection component (22) is in communication with the detection air exhaust channel (212).

10. The range hood according to claim 1, characterized in that: The main body comprises a frame assembly (6) and a cover assembly (7), wherein the cover assembly (7) is connected to the frame assembly (6) to form the telescopic inner cavity (a) therebetween, and the main body further comprises an air collecting box assembly (8), wherein a smoke exhaust fan (81) is arranged in the air collecting box assembly (8), and the smoke exhaust fan (81), the PM2.5 detection unit (2) and the drive assembly (5) are connected to a control system of the smoke exhaust fan, and the control system enables the smoke exhaust fan (81) and the PM2.5 detection unit (2) to be linked.

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