Pm2.5 measurement module and range hood with same

Abstract

The present application relates to the technical field of range hoods. Disclosed are a PM2.5 measurement module and a range hood with same. The PM2.5 measurement module comprises: a main machine body, which comprises a telescopic inner cavity enclosed by a frame assembly and a cover plate assembly, wherein a third measurement hole is provided in the bottom of the frame assembly; a telescopic panel assembly, which is driven by a driving assembly and is slidably connected into the telescopic inner cavity, wherein a first measurement hole is provided in the top of the telescopic panel assembly, and a second measurement hole is provided in the bottom of the telescopic panel assembly; and a PM2.5 measurement unit, which is arranged in a mounting cavity of the telescopic panel assembly.

Description

A PM2.5 detection module and a smoke exhaust fan having the same

[0001] This application claims priority to a Chinese patent application filed with the Patent Office of China on December 4, 2023, with application number 202311647074.X and invention name “A PM2.5 detection module and a range hood having the same”, the entire contents of which are incorporated by reference into the application. Technical Field

[0002] The present application relates to the technical field of range hoods, and in particular, to a PM2.5 detection module and a range hood having the same. Background Art

[0003] In daily life, range hoods have entered the kitchens of thousands of households, solving the problem of cooking fumes for users. However, with the continuous improvement of living standards, the PM2.5 index has become a health indicator, and users' requirements for range hoods are no longer limited to basic fume removal. How to improve the intelligence of range hoods to ensure the health of cooks has become a pressing issue. To save kitchen space, existing range hoods are equipped with a retractable panel assembly. The PM2.5 detection module is located on the retractable panel assembly. When the user is cooking, the range hood's exhaust fan operates, and the retractable panel assembly extends out of the retractable cavity. The PM2.5 detection module extends with the retractable panel assembly and monitors the air quality of the cooking environment. However, after cooking is completed, the retractable panel assembly retracts out of the retractable cavity, and the PM2.5 detection module can no longer detect PM2.5 levels in the ambient air. The user is not notified when fume backflow occurs. Technical issues

[0004] The purpose of this application is to provide a PM2.5 detection module and a range hood having the same, which are used to solve the above-mentioned technical problems. Technical Solutions

[0005] A PM2.5 detection module for a range hood, comprising:

[0006] The main body includes a frame assembly and a cover assembly, the frame assembly and the cover assembly are connected to form a telescopic inner cavity, and a third detection hole is provided at the bottom of the frame assembly;

[0007] A telescopic panel assembly is slidably connected to the telescopic inner cavity, and has a first detection hole on its top and a second detection hole on its bottom;

[0008] a PM2.5 detection unit, which is located in the mounting cavity of the telescopic panel assembly;

[0009] A driving assembly is provided in the telescopic inner cavity, the driving assembly is connected to the telescopic panel assembly, and is used to drive the telescopic panel assembly to extend or retract into the telescopic inner cavity;

[0010] 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 third detection hole through the second detection hole, and the third detection hole is connected to the outside.

[0011] In one embodiment, when the telescopic panel assembly extends out of the telescopic inner cavity, the third detection hole is sealed and the second detection hole is sealed within the telescopic inner cavity; when the telescopic panel assembly retracts into the telescopic inner cavity, the first detection hole is sealed, the second detection hole is connected to the third detection hole, and the third detection hole is connected to the outside.

[0012] In one embodiment, 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 third detection hole. When the telescopic panel assembly retracts into the telescopic inner cavity, the detection hole switch assembly opens the third detection hole and connects the third detection hole with the second detection hole.

[0013] In one embodiment, 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 air duct aligned with the third detection hole, the extension seat is provided with an extension air duct connected to the air duct, 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 switch slider acts on the extension seat and seals the air duct, the extension seat spring is compressed; when the switch slider leaves the extension seat and opens the air duct, the switch slider spring is compressed, the extension seat spring resets and drives the extension seat to move upward.

[0014] In one embodiment, the air duct includes an air intake duct and an exhaust duct that are simultaneously aligned with the third detection hole, and the extended air duct includes an air intake extension duct and an exhaust extension duct that are respectively connected to the air intake duct and the exhaust duct. 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 intake duct and the exhaust duct. The extension seat spring resets and drives the air intake extension duct and the exhaust extension duct to slide upward along the air intake duct and the exhaust duct and abut against the second detection hole.

[0015] In one embodiment, a sealing assembly is further included, wherein the first detection hole is located on the front side of the sealing assembly, and the second detection hole is located on the rear side of the sealing assembly. The sealing assembly 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.

[0016] In one embodiment, a detection hole sealing assembly is provided in the telescopic inner cavity, and when the telescopic panel assembly is retracted into the telescopic inner cavity, the detection hole sealing assembly seals the first detection hole.

[0017] In one embodiment, the detection hole sealing assembly includes a sealing seat, a sealing block and a sealing slider. The sealing seat is connected to the top of the telescopic inner cavity, the sealing block is connected to the sealing seat by sliding up and down, a sealing block spring is provided between the sealing block and the sealing seat, the sealing slider is connected to the sealing seat by sliding back and forth, and the rear end of the sealing slider is connected to the sealing slider spring; when the sealing slider acts on the sealing block, the sealing block spring is compressed; when the sealing slider leaves the sealing block, the sealing slider spring is compressed, the sealing block spring resets and pushes the sealing block to move downward.

[0018] In one embodiment, 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 mutually independent detection air intake channel and a detection exhaust channel. The upper end 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 lower end openings of the detection air intake channel and the detection exhaust channel abut the bottom surface of the telescopic panel assembly and are aligned with the second 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.

[0019] A range hood adopts the above-mentioned PM2.5 detection module. A wind collecting box assembly is also provided in the main body, and a smoke exhaust fan is provided in the wind collecting box assembly. The smoke exhaust fan, PM2.5 detection unit and drive assembly are connected to the control system of the range hood. The control system links the smoke exhaust fan and PM2.5 detection unit. Beneficial effects

[0020] Compared with the existing technology, the PM2.5 detection module of this application has the following advantages:

[0021] The PM2.5 detection module of the present application is that 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, and the external air can enter the PM2.5 detection unit through the first detection hole. The PM2.5 detection unit detects 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, so that the user can have a healthy cooking environment; when the telescopic panel assembly is retracted into the telescopic inner cavity, the PM2.5 detection unit is connected to the third detection hole through the second detection hole, and the third detection hole is connected to the outside. The PM2.5 detection unit continues to detect the PM2.5 content in the ambient air, which can avoid the backflow of oil fume without being noticed by the user, thereby ensuring the quality of the ambient air. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] FIG1 is an exploded view of a range hood having a PM2.5 detection module according to the present application;

[0023] FIG2 is a schematic structural diagram of the telescopic panel assembly in FIG1 from another direction;

[0024] FIG3 is an exploded view of the PM2.5 detection unit in FIG1 ;

[0025] FIG4 is a schematic structural diagram of the detection hole switch assembly in FIG1 ;

[0026] FIG5 is an exploded view of the detection hole switch assembly in FIG4 ;

[0027] FIG6 is a schematic structural diagram of the detection hole sealing assembly in FIG1 ;

[0028] FIG7 is an exploded view of the detection hole sealing assembly in FIG6 ;

[0029] FIG8 is a cross-sectional view of the telescopic panel assembly of the range hood having the PM2.5 detection module of the present application after being retracted into the telescopic inner cavity;

[0030] FIG9 is a cross-sectional view of the telescopic panel assembly of the range hood having the PM2.5 detection module of the present application after extending out of the telescopic inner cavity;

[0031] FIG10 is a partial enlarged view of A in FIG8 ;

[0032] FIG11 is a partial enlarged view of B in FIG9 .

[0033] Figure: a. Telescopic cavity, a1. Third detection hole, 1. Telescopic panel assembly, 11. First detection hole, 12. Second detection hole, 2. PM2.5 detection unit, 21. Detection housing, 211. Detection air intake channel, 212. Detection exhaust channel, 22. PM2.5 detection element, 3. Detection hole switch assembly, 31. Switch base, 311. Air intake channel, 3111. First notch, 312. Exhaust channel, 3121. Second notch, 313. First front and rear slide groove, 314 front and rear guide blocks, 315 extension seat spring seat, 3151 extension seat limit block, 32 extension seat, 321 intake extension duct, 322 exhaust extension duct, 323 second actuator, 324 extension seat spring slide groove, 3241 extension seat limit groove, 33 switch slider, 331 first sealing plate, 332 second sealing plate, 333 first actuator, 334 front and rear guide grooves, 34 extension seat spring , 35. Switch slider spring, 36. First sealing sponge, 4. Sealing assembly, 41. First sealing strip, 42. Second sealing strip, 5. Detection hole sealing assembly, 51. Sealing seat, 511. First upper and lower guide blocks, 512. Second front and rear slide grooves, 513. Upper and lower slide grooves, 514. Sealing block spring seat, 5141. Sealing block limit block, 52. Sealing block, 521. Upper and lower guide grooves, 522. Extension plate, 5221. First starting block, 522 2. Second upper and lower guide blocks, 523. Sealing block spring sliding groove, 5231. Sealing block limiting groove, 53. Sealing slider, 531. Main body, 5311. Sealing slider spring seat, 532. Sliding connection part, 5321. Second starting block, 533. Starting part, 54. Sealing block spring, 55. Sealing slider spring, 56. Second sealing sponge, 6. Frame assembly, 7. Cover assembly, 8. Drive assembly, 9. Air collecting box assembly, 91. Smoke exhaust fan.

[0034] The implementation and advantages of the functions of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. Modes for Carrying Out the Invention

[0035] The following diagrams illustrate various embodiments of the present application. For clarity, many practical details will be included in the following description. However, it should be understood that these practical details are not intended to limit the present application. In other words, in some embodiments of the present application, these practical details are not essential. Furthermore, to simplify the drawings, some conventional structures and components are depicted in a simplified schematic manner.

[0036] It should be noted that all directional indications in the embodiments of the present application (such as up, down, left, right, front, back, etc.) 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.

[0037] In addition, in this application, descriptions such as "first" and "second" are only used for descriptive purposes and do not specifically refer to the order or ranking, nor are they used to limit this application. 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 such feature. 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 this application.

[0038] In order to further understand the content, features and effects of the present application, the following embodiments are given as examples and described in detail with reference to the accompanying drawings:

[0039] Please refer to Figures 1 to 11. This application discloses a PM2.5 detection module. The PM2.5 detection module disclosed in this application is used for a range hood, including a main body, a telescopic panel assembly 1, a PM2.5 detection unit 2, and a drive assembly 8. The main body includes a frame assembly 6 and a cover assembly 7. The frame assembly 6 and the cover assembly 7 are connected to form a telescopic inner cavity a. The bottom of the frame assembly 6 is provided with a third detection hole a1; the telescopic panel assembly 1 is slidably connected to the telescopic inner cavity a, and its top is provided with a first detection hole 11, and its bottom is provided with a second detection hole 12. ; The PM2.5 detection unit 2 is arranged in the installation cavity of the telescopic panel assembly 1; the driving assembly 8 is arranged in the telescopic inner cavity a, and the driving assembly 8 is connected to the telescopic panel assembly 1, and is used to drive the telescopic panel assembly 1 to extend or retract 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 third detection hole a1 through the second detection hole 12, and the third detection hole a1 is connected to the outside. The PM2.5 detection module of the present application, when applied to the range hood, when the range hood is working, the driving component 8 drives the telescopic panel component 1 to extend from the telescopic inner cavity a, and the first detection hole 11 is connected to the outside, and the external 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. Through the M2.5 content value detected by the PM2.5 detection unit 2, the user can clearly understand the purification effect of the range hood on the oil fume, 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 of the range hood to extract and discharge the oil fume as quickly as possible to reduce the PM2.5 content in the cooking environment air, so that the user has a healthy cooking environment; after the user finishes cooking, the exhaust fan of the range hood is turned off, and the driving component 8 drives The dynamic telescopic panel assembly 1 retracts the telescopic inner cavity a, and the PM2.5 detection unit 2 is connected to the third detection hole a1 through the second detection hole 12. The third detection hole a1 is connected to the outside. The external air can enter the second detection hole 12 through the third detection hole a1, and then enter the PM2.5 detection unit 2 through the second detection hole 12. 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 of the range hood again and make the smoke exhaust fan draw air in the environment. 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 again.

[0040] Please refer to Figure 1. In the PM2.5 detection module of the present application, when the telescopic panel assembly 1 extends out of the telescopic inner cavity a, the third detection hole a1 is sealed and the second detection hole 12 is sealed in the telescopic inner cavity a; when the telescopic panel assembly 1 retracts into the telescopic inner cavity a, the first detection hole 11 is sealed, the second detection hole 12 is connected to the third detection hole a1, and the third detection hole a1 is connected to the outside. When used in a range hood, when the smoke exhaust fan of the range hood is started, the driving component 8 drives the telescopic panel component 1 to extend out of the telescopic inner cavity a. The oil smoke generated when the user cooks is located below the telescopic panel component 1. If the third detection hole a1 is in an open state, the oil smoke generated by cooking will enter the second detection hole 12 through the third detection hole a1, and then be detected by the PM2.5 detection unit 2. The detection result of the PM2.5 detection unit 2 cannot represent the purification effect of the smoke exhaust fan, so when the telescopic panel component 1 extends out of the telescopic inner cavity a, the third detection hole a1 is sealed, and the second detection hole 12 is sealed in the telescopic inner cavity a. The oil smoke generated by cooking cannot enter the PM2.5 detection unit 2 through the third detection hole a1 and the second detection hole 12. The air detected by the PM2.5 detection unit 2 comes from the external air entering through the first detection hole 11, which is the clean air when the range hood is working. The PM2.5 content value in the air after cooking can actually reflect the air quality of the cooking environment and provide a basis for the range hood control system to control the power of the smoke exhaust fan; and after the driving component 8 drives the telescopic panel component 1 to retract the telescopic inner cavity a, the first detection hole 11 is sealed, the third detection hole a1 is connected to the outside, and the second detection hole 12 is connected to the third detection hole a1. 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 range hood control system will start the smoke exhaust fan of the range hood again and make the smoke exhaust fan purify the ambient air.

[0041] Please refer to Figures 1, 8 and 9. The PM2.5 detection module of the present application has a detection hole switch assembly 3 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 third detection hole a1. When the telescopic panel assembly 1 retracts into the telescopic inner cavity a, the detection hole switch assembly 3 opens the third detection hole a1 and connects the third detection hole a1 with the second detection hole 12. When the telescopic panel assembly 1 retracts into the telescopic inner cavity, if the detection hole switch assembly 3 only opens the third detection hole a1, and does not directly connect the third detection hole a1 with the second detection hole 12, when the PM2.5 detection unit 2 is started, the PM2.5 detection unit 2 first draws in 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 through the third detection hole a1. The detection result of the PM2.5 detection unit 2 has a hysteresis and may have errors compared 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 The detection unit 2 can still detect the ambient air quality in real time. The PM2.5 detection module of the present application is provided with a detection hole switch assembly 3 that directly connects the third detection hole a1 and the second detection hole 12. In this way, when the PM2.5 detection unit 2 is started, the external air enters the detection hole switch assembly 3 through the third detection hole a1, and then enters the second detection hole 12 through the detection hole switch assembly 3, and then enters the PM2.5 detection unit 2 through the second detection hole 12 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.

[0042] Please refer to Figures 4, 5, 8 to 11. The PM2.5 detection module of the present application, 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 third detection hole a1, and the extension seat 32 is provided with an extension airway connected to the airway. An extension seat spring 34 is provided between the extension seat 32 and the switch seat 31, and the rear end of the switch slider 33 is connected to the switch slider spring 35; 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 resets and drives the extension seat 32 to move upward. When the telescopic panel assembly 1 moves into the telescopic inner cavity a, the rear side 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 backward. 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 upward under the action of the extension seat spring 34, causing the extended airway to rise along the airway and abut against the bottom of the telescopic panel assembly 1, and the extended airway is aligned with the second detection hole 12. At this time The third detection hole a1, the air duct, the extended air duct and the second detection hole 12 are connected in sequence, and the external air passes through the third detection hole a1, the air duct, the extended air duct and the second detection hole 12 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 downward, 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 air duct.

[0043] Please refer to Figures 4, 5, 8 to 11. The PM2.5 detection module of the present application, the air duct includes an intake duct 311 and an exhaust duct 312 that are aligned with the third detection hole a1 at the same time, and the extended air duct includes an intake extension duct 321 and an exhaust extension duct 322 that are respectively connected to the intake 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 intake duct 311 and the exhaust duct 312. The extension seat spring 34 resets and drives the intake extension duct 321 and the exhaust extension duct 322 to slide upward along the intake duct 311 and the exhaust duct 312 and abut against the second detection hole 12. The air duct is divided into an intake duct 311 and an exhaust duct 312, and the extended air duct is divided into an intake extension duct 321 and an exhaust extension duct 322. The intake duct 311 is connected to the 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 upward and abuts against the bottom of the telescopic panel assembly 1, the intake extension duct 321 is aligned with part of the second detection hole 12, and the exhaust extension duct 322 is aligned with another part of the second detection hole 12. In this way, when the PM2.5 detection unit 2 is working, part of the air enters the intake duct 311 through the part of the third detection hole a1 that is aligned with the intake duct 311, flows along the intake duct 311 and enters the intake extension duct 32 1, then enters the portion of the second detection hole 12 aligned with the intake extension duct 321 through the air inlet extension duct 321, then enters the PM2.5 detection unit 2 through the second detection hole 12. After being detected by the PM2.5 detection unit 2, the air is discharged into the exhaust extension duct 322 through the portion of the exhaust extension duct 322 aligned with the second detection hole 12, then enters the exhaust duct 312 through the exhaust extension duct 322, and finally is discharged through the portion of the third detection hole a1 aligned with the exhaust duct 312. This separates the airflow path entering the PM2.5 detection unit 2 from the airflow path exiting the PM2.5 detection unit 2. In this way, the PM2.5 detection unit 2 detects real-time ambient air, making the detection results more meaningful. When the telescopic panel assembly 1 extends out of the telescopic inner cavity a, the switch slider spring 35 pushes the switch slider 33 toward the user and presses the extension seat 32 downward, causing the extended airway to move downward along the airway and leave the bottom of the telescopic panel assembly 1. When the telescopic panel assembly 1 leaves the telescopic inner cavity a, it does not interfere with the movement of the telescopic panel assembly 1.

[0044] 4, 5, 8 to 11, the PM2.5 detection module of the present application has a first notch 3111 on the rear side wall of the air inlet duct 311, and a second notch 3121 on the rear side wall of the exhaust duct 312; a first sealing plate 331, a second sealing plate 332 and a first starting member 333 are extended forward on the front side wall of the switch slider 33; 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 extends through the second notch The opening 3121 enters the exhaust duct 312 and seals the exhaust duct 312, and 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, and the first sealing plate 331 and the second sealing plate 332 withdraw from the intake duct 311 and the exhaust duct 312, the switch slider spring 35 is compressed, and the extension seat spring 34 resets and drives the intake extension duct 321 and the exhaust extension duct 322 to slide upward.When the telescopic panel assembly 1 extends out of the telescopic inner cavity a, the switch slider spring 35 resets 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, and the external air passes through the third detection member at the bottom of the telescopic inner cavity a. After the hole a1 enters the air inlet duct 311, the air cannot continue to flow along the air inlet duct 311 toward the air inlet extension duct 321; when the telescopic panel assembly 1 retracts the telescopic inner cavity a, the rear side wall 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 air inlet duct 311 and the exhaust duct 312, the switch slider spring 35 is compressed, and the extension seat spring 34 is reset. Drive the air intake extension duct 321 and the exhaust extension duct 322 to slide upward along the air intake duct 311 and the exhaust duct 312, and the air intake extension duct 321 and the exhaust extension duct 322 abut against the bottom plate of the telescopic panel assembly 1 and align with the second detection hole 12 on the bottom plate 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 intake duct 311 through the third detection hole a1 at the bottom of the telescopic inner cavity a and the part aligned with the air intake duct 311, and then enters the air intake extension duct 311 along the air intake duct 311. 21, flows along the air intake extension duct 321 and enters the PM2.5 detection unit 2 through the part that is aligned with the air intake extension duct 321 through the second detection hole 12 at the bottom of the telescopic panel assembly 1. After being detected by the PM2.5 detection unit 2, it enters the exhaust extension duct 322 through the part that is aligned with the exhaust extension duct 322 through the second detection hole 12 at the bottom of the telescopic panel assembly 1. It flows along the exhaust extension duct 322 and enters the exhaust duct 312 through the exhaust extension duct 322. Finally, it is discharged from the part that is aligned with the exhaust duct 312 through the third detection hole a1 at the bottom of the telescopic inner cavity a.

[0045] Referring to Figures 4 and 5 , the PM2.5 detection module of the present application has a second actuator 323 disposed on the rear wall of the extension seat 32. The second actuator 323 has an inclined surface facing the switch slider 33, and the inclined surface is arranged to slope downward from the side away from the switch slider 33 to the side closer to the switch slider 33. The first actuator 333 has an inclined surface facing the second actuator 323, and the inclined surface of the first actuator 333 is inclined in the opposite direction to the inclined surface of the second actuator 323. When the telescopic panel assembly 1 extends out of the telescopic inner cavity a, the force exerted by the rear wall of the telescopic panel assembly 1 on the switch slider 33 disappears. When the switch slider spring 35 resets and pushes the switch slider 33 toward the user, the inclined surface of the first actuator 333 slides along the inclined surface of the second actuator 323, causing the extension seat 32 to move downward. The extension seat 32 leaves the bottom of the telescopic panel assembly 1 and compresses the extension seat spring 34 downward.

[0046] Referring to Figures 4 and 5 , the PM2.5 detection module of the present application has first front-rear grooves 313 on the left and right sides of the switch base 31. The outer sides of the first sealing plate 331 and the second sealing plate 332 are respectively slidably connected to the first front-rear grooves 313 on the corresponding sides. When the telescopic panel assembly 1 extends out of the telescopic inner cavity a, the force applied by the telescopic panel assembly 1 to the switch slider 33 disappears. When the switch slider spring 35 resets and pushes the switch slider 33 toward the user, the first sealing plate 331 and the second sealing plate 332 slide along the first front-rear grooves 313 on the corresponding sides, thereby preventing the switch slider 33 from shifting in its direction of movement and ensuring the linear movement of the switch slider 33.

[0047] Referring to Figures 4 and 5 , the PM2.5 detection module of the present application has a front-to-rear guide groove 334 formed between the first sealing plate 331 and the second sealing plate 332. The switch base 31 is provided with a front-to-rear guide block 314 located between the air inlet duct 311 and the exhaust duct 312. The front-to-rear guide block 314 is slidably connected within the front-to-rear 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 resets and pushes the switch slider 33 to slide toward the user, the first sealing plate 331 and the second sealing plate 332 slide along the first front-to-rear guide groove 313 on the corresponding side. At the same time, the front-to-rear guide block 314 slides along the front-to-rear guide groove 334. This can prevent the movement direction of the switch slider 33 from deviating, ensuring the linear movement of the switch slider 33. And because the intake 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 intake duct 311 and the exhaust duct 312 respectively.

[0048] Referring to Figures 4 and 5 , the PM2.5 detection module of the present application has extension seat spring sliding slots 324 on both sides of the extension seat 32. An extension seat spring seat 315 corresponding to the extension seat spring sliding slots 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 slots 324. When the switch slider 33 acts on the extension seat 32, the intake extension duct 321 and the exhaust extension duct 322 slide downward along the intake duct 311 and the exhaust duct 312. The extension seat spring sliding slots 324 slide along the extension seat spring seat 315 and compress the extension seat spring 34 downward. Under the restraining action of the extension seat spring sliding slots 324 and the extension seat spring seat 315, the extension seat spring 34 can only deform vertically within the lower extension seat spring sliding slot 324 and the extension seat spring seat 315, and cannot deform in a twisting direction.

[0049] Please refer to Figures 4 and 5. In the PM2.5 detection module of the present application, 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. 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 downward along the intake duct 311 and the exhaust duct 312, and the intake extension duct 321 and the exhaust extension duct 322 slide downward 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, and the extension seat spring 34 pushes the extension seat 32 to move upward, 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.

[0050] 4 and 5 , in the PM2.5 detection module of the present application, a first sealing sponge 36 is provided on a side of the extension seat 32 away from the switch seat 31 , and the first sealing sponge 36 is provided with openings corresponding to the intake extension duct 321 and the exhaust extension duct 322 . After the switch slider 33 leaves the extension seat 32, the extension seat spring 34 resets and pushes the extension seat 32 to move upward. When the intake extension duct 321 and the exhaust extension duct 322 move upward along the intake duct 311 and the exhaust duct 312 and act on the bottom surface of the telescopic panel assembly 1, the first sealing sponge 36 is squeezed between the extension seat 32 and the bottom surface of the telescopic panel assembly 1, sealing the gap between the extension seat 32 and the bottom surface of the telescopic panel assembly 1, so that the intake air can only enter the second detection hole 12 on the bottom surface of the telescopic panel assembly 1 through the intake extension duct 321, and the exhaust of the PM2.5 detection unit 2 can only enter the exhaust extension duct 322 through the part of the second detection hole 12 on the bottom surface of the telescopic panel assembly 1 that is aligned with the exhaust extension duct 322, and then be discharged through the exhaust extension duct 322, the exhaust duct 312 and the third detection hole a1 at the bottom of the telescopic inner cavity in turn.

[0051] Please refer to Figures 1, 2, 8 to 11. The PM2.5 detection module of the present application also includes a sealing assembly 4. The first detection hole 11 is located on the front side of the sealing assembly 4, and the second detection hole 12 is located on the rear side of the sealing assembly 4. 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 stove. 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. In this embodiment, the sealing assembly 4 includes a first sealing strip 41, which is located on the lower side wall of the telescopic panel assembly 1. The second detection hole 12 is located on the rear side of the first sealing strip 41. 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 side wall of the telescopic panel assembly 1 and the lower edge of the opening of the telescopic inner cavity a, sealing the gap between the lower surface of the telescopic panel assembly 1 and the opening of the telescopic inner cavity a.

[0052] In one 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 contaminate 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 side wall of the telescopic panel assembly 1, the second detection hole 12 is located on the rear side of the first sealing strip 41, the second sealing strip 42 is located on the upper side wall of the telescopic panel assembly 1, and 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 outside 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 side wall 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 side wall of the telescopic panel assembly 1 and the upper edge of the opening of the telescopic inner cavity a, sealing the gap between the telescopic panel assembly 1 and the opening of the telescopic inner cavity a.

[0053] Please refer to Figures 1 and 8 to 11. In the PM2.5 detection module of the present application, a detection hole sealing assembly 5 is provided in the telescopic inner cavity a. When the telescopic panel assembly 1 is retracted into the telescopic inner cavity a, the detection hole sealing assembly 5 seals the first detection hole 11. When the telescopic panel assembly 1 is retracted into the telescopic inner cavity a, the first detection hole 11 enters the telescopic inner cavity a. If the first detection hole 11 is not sealed, when the PM2.5 detection unit 2 is working, the air in the telescopic inner cavity a will enter the PM2.5 detection unit 2 through the first detection hole 11. At this time, the air detected by the PM2.5 detection unit 2 includes both the air in the telescopic inner cavity a and the external air that enters through the third detection hole a1, the air inlet duct 311, the air inlet extension duct 321, and the second detection hole 12 in sequence. The air quality of this air cannot represent the external air quality. Therefore, when the telescopic panel assembly 1 retracts the telescopic inner cavity a, the detection hole sealing assembly 5 seals the first detection hole 11, and only external air can enter the PM2.5 detection unit 2 through the third detection hole a1, the air inlet duct 311, the air inlet extension duct 321 and the second detection hole 12. The detection value of the PM2.5 detection unit 2 can represent the external air quality.

[0054] Please refer to Figures 6 to 11. The PM2.5 detection module of the present application, the detection hole sealing assembly 5 includes a sealing seat 51, a sealing block 52 and a sealing slider 53. The sealing seat 51 is connected to the top of the telescopic inner cavity a, and the sealing block 52 is connected to the sealing seat 51 by sliding up and down. A sealing block spring 54 is provided between the sealing block 52 and the sealing seat 51. The sealing slider 53 is connected to the sealing seat 51 by sliding back and forth, and the rear end of the sealing slider 53 is connected to the sealing slider spring 55; when the sealing slider 53 acts on the sealing block 52, the sealing block spring 54 is compressed; when the sealing slider 53 leaves the sealing block 52, the sealing slider spring 55 is compressed, and the sealing block spring 54 resets and pushes the sealing block 52 to move downward. When the telescopic panel assembly 1 extends out of the telescopic inner cavity a, the first detection hole 11 on the top of the telescopic panel assembly 1 extends out of the telescopic inner cavity a, and the external air enters the PM2.5 detection unit 2 through the first detection hole 11 on the top of the telescopic panel assembly 1 and is detected by the PM2.5 detection unit 2; when the telescopic panel assembly 1 retracts into the telescopic inner cavity a, the rear side wall of the telescopic panel assembly 1 acts on the sealing slider 53 and moves the sealing slider 53 away from the user side, and the sealing slider 53 leaves the sealing block 52, and the sealing block spring 54 resets and pushes the sealing block 52 to move downward. When the telescopic panel assembly 1 retracts into place in the telescopic inner cavity a, the sealing block spring 54 is fully reset and presses the sealing block 52 against the top of the telescopic panel assembly 1. The sealing block 52 seals the first detection hole 11 at the top of the telescopic panel assembly 1. The air in the telescopic inner cavity a cannot enter the PM2.5 detection unit 2 in the telescopic panel assembly 1 through the first detection hole 11 at the top of the telescopic panel assembly 1, thereby preventing the air detected by the PM2.5 detection unit 2 from being mixed with the air in the telescopic inner cavity a, so that the detection result of the PM2.5 detection unit 2 can truly reflect the external air quality.

[0055] Referring to Figures 6 and 7 , the PM2.5 detection module of the present application has a sealing seat 51 of the detection hole sealing assembly 5, which is provided with a first upper and lower guide block 511 and a second front-rear slide groove 512. The sealing block 52 is provided with an upper and lower guide groove 521. The first upper and lower guide block 511 is slidably connected to the upper and lower guide groove 521, and the sealing slider 53 is slidably connected to the second front-rear slide groove 512. When the telescopic panel assembly 1 retracts into the telescopic inner cavity a, the rear wall surface of the telescopic panel assembly 1 acts on the sealing slider 53 and drives the sealing slider 53 to move along the second front-rear slide groove 512 away from the user side. The sealing slider 53 leaves the sealing block 52, and the sealing block spring 54 resets and drives the sealing block 52 downward. During the downward movement of the sealing block 52, the upper and lower guide groove 521 moves along the first upper and lower guide block 511, which can ensure the linear movement of the sealing block 52. When the telescopic panel assembly 1 extends from the telescopic inner cavity a, the force exerted by the rear wall of the telescopic panel assembly 1 on the sealing slider 53 disappears. When the sealing slider spring 55 resets and drives the sealing slider 53 to move toward the user side, the sealing slider 53 slides along the second front and rear slide grooves 512, which can ensure the linear movement of the sealing slider 53. The sealing block spring 54 drives the sealing block 52 to move downward, and the upper and lower guide grooves 521 move along the first upper and lower guide blocks 511, which can ensure the linear movement of the sealing block 52.

[0056] Please refer to Figures 6 and 7. In the PM2.5 detection module of the present application, the sealing block 52 of the detection hole sealing assembly 5 is provided with an extension plate 522 on the side facing the sealing slider 53, and the extension plate 522 is provided with a first starting block 5221. The first starting block 5221 is inclined on the side facing the sealing slider 53, and the inclined surface is inclined downward from the side away from the sealing slider 53 to the side close to the sealing slider 53. When the sealing slider 53 slides toward the user side, it acts on the first starting block 5221, causing the sealing block 52 to move upward and compress the sealing block spring 54. When the telescopic panel assembly 1 extends from the telescopic inner cavity a, the force exerted by the rear wall of the telescopic panel assembly 1 on the sealing slider 53 disappears, the sealing slider spring 55 resets and drives the sealing slider 53 to slide toward the user side, and when the sealing slider 53 slides toward the user side, its lower surface first acts on the first starting block 5221 and cuts into from the lowest end of the inclined surface of the first starting block 5221. In the process of the sealing slider 53 sliding toward the user side, the lower surface of the sealing slider 53 gradually approaches the higher end of the inclined surface of the first starting block 5221 and squeezes the first starting block 5221. The sealing block 52 moves toward the sealing seat 51 and compresses the sealing block spring 54 during the movement.

[0057] Please refer to Figures 6 and 7. The PM2.5 detection module of the present application, the sealing slider 53 of the detection hole sealing assembly 5 includes a main body 531, and a sliding connection part 532 and a starting part 533 are provided on the main body 531. The sliding connection part 532 is provided at the lower end of the main body 531 and is slidably connected in the second front and rear slide grooves 512. The starting part 533 is provided above the sliding connection part 532, and a second starting block 5321 is provided on its lower surface. The side of the second starting block 5321 facing the first starting block 5221 is a slope, and the inclination direction of the slope on the second starting block 5321 is opposite to the inclination direction of the slope on the first starting block 5221. When the telescopic panel assembly 1 extends from the telescopic inner cavity a, the force exerted by the rear wall of the telescopic panel assembly 1 on the sealing slider 53 disappears, the sealing slider spring 55 resets and drives the sealing slider 53 to slide toward the user side, and when the sealing slider 53 slides toward the user side, the sliding connection part 532 slides along the second front and rear slide grooves 512, and the highest end of the inclined surface of the second starting block 5321 on the lower surface of the starting part 533 acts on the lowest end of the inclined surface of the first starting block 5221. In the process of the sealing slider 53 sliding toward the user side, the inclined surface of the second starting block 5321 slides along the inclined surface of the first starting block 5221 and squeezes the inclined surface of the first starting block 5221. Under the action of the second starting block 5321, the sealing block 52 moves upward and compresses the sealing block spring 54.

[0058] Please refer to Figures 6 and 7. In the PM2.5 detection module of the present application, second upper and lower guide blocks 5222 are provided on both sides of the extension plate 522 of the detection hole sealing assembly 5. The sealing seat 51 is provided with upper and lower sliding grooves 513 corresponding to the second upper and lower guide blocks 5222. The second upper and lower guide blocks 5222 are slidably connected in the upper and lower sliding grooves 513. When the telescopic panel assembly 1 is extended from the telescopic inner cavity a, the force exerted on the sealing slider 53 by the rear wall of the telescopic panel assembly 1 disappears, the sealing slider spring 55 resets and drives the sealing slider 53 to slide toward the user side. When the sealing slider 53 slides toward the user side, the sliding connection part 532 slides along the second front and rear sliding grooves 512, and the inclined surface of the second starting block 5321 slides along the inclined surface of the first starting block 5221 and squeezes the inclined surface of the first starting block 5221. Under the action of the second starting block 5321, the sealing block 52 moves upward, and the second upper and lower guide blocks 5222 slide along the upper and lower sliding grooves 513. When the telescopic panel assembly 1 is retracted into the telescopic inner cavity a, the rear wall of the telescopic panel assembly 1 acts on the sealing slider 53 and drives the sealing slider 53 to slide away from the user side, and the sliding connection part 532 slides along the second front and rear slide grooves 512, and the inclined surface of the second starting block 5321 retreats along the inclined surface of the first starting block 5221, and the squeezing force on the inclined surface of the first starting block 5221 gradually decreases, and the sealing block spring 54 gradually resets and drives the sealing block 52 to move downward, and the second upper and lower guide blocks 5222 slide along the upper and lower sliding grooves 513.

[0059] Please refer to Figures 6 and 7. In the PM2.5 detection module of the present application, a sealing slider spring seat 5311 is provided on the side of the main body 531 of the detection hole sealing assembly 5 away from the first starting block 5221, and the front and rear slider springs 5 ​​are arranged in the sealing slider spring seat 5311. When the rear wall of the telescopic panel assembly 1 acts on the sealing slider 53 and drives the sealing slider 53 to move on the sealing seat 51 away from the user side, the front and rear slider springs 5 ​​are compressed; when the external force disappears, the front and rear slider springs 5 ​​reset and drive the sealing slider 53 to move on the sealing seat 51 toward the user side. When the telescopic panel assembly 1 is extended from the telescopic inner cavity a, the force exerted by the telescopic panel assembly 1 on the sealing slider 53 disappears, the front and rear slider springs 5 ​​are reset and drive the sealing slider 53 to move toward the user side, so that the sealing slider 53 acts on the sealing block 52; when the telescopic panel assembly 1 is retracted into the telescopic inner cavity a, the rear side wall of the telescopic panel assembly 1 acts on the front and rear sliders 2 and pushes the sealing slider 53 to move away from the user side, and the sealing slider 53 compresses the front and rear slider springs 5, so that the front and rear slider springs 5 ​​accumulate force, so as to drive the sealing slider 53 to reset when the telescopic panel assembly 1 is extended from the telescopic inner cavity a.

[0060] Referring to Figures 6 and 7 , the PM2.5 detection module of the present application has sealing block spring sliding grooves 523 on both sides of the sealing block 52 of the detection hole sealing assembly 5. A sealing block spring seat 514 corresponding to the sealing block spring sliding grooves 523 is provided on the sealing seat 51. The sealing block spring 54 is connected to the sealing block spring seat 514, and the sealing block spring seat 514 is slidably connected to the sealing block spring sliding grooves 523. When the sealing slider 53 acts on the sealing block 52 and moves the sealing block 52 toward the sealing seat 51, or when the sealing slider 53 leaves the sealing block 52, the sealing block spring 54 drives the sealing block 52 to move away from the sealing seat 51, the sealing block spring sliding grooves 523 slide along the sealing block spring seat 514, thereby ensuring the linear movement of the sealing block 52. At the same time, the sealing block spring seat 514 and the sealing block spring sliding grooves 523 limit the sealing block spring 54, so that the sealing block spring 54 can only deform in the vertical direction and cannot be twisted or deformed.

[0061] Please refer to Figures 6 and 7. In the PM2.5 detection module of the present application, a sealing block limiting groove 5231 is provided on the side wall of the sealing block spring sliding groove 523 of the detection hole sealing assembly 5, and a sealing block limiting block 5141 is provided on the sealing block spring seat 514. The sealing block limiting block 5141 is slidably connected to the sealing block limiting groove 5231. When the sealing slider 53 acts on the sealing block 52, the sealing block spring sliding groove 523 slides along the sealing block spring seat 514, and the sealing block limiting block 5141 slides along the sealing block limiting groove 5231, and the sealing block spring 54 is compressed. After the sealing slider 53 leaves the sealing block 52, the sealing block spring 54 resets, and the sealing block spring 54 pushes the sealing block 52 downward. The sealing block limiting block 5141 limits the sealing block spring sliding groove 523 through the sealing block limiting groove 5231, preventing the sealing block spring sliding groove 523 from detaching from the sealing block spring seat 514.

[0062] Please refer to Figures 6 and 7. In the PM2.5 detection module of the present application, a second sealing sponge 56 is provided on the side of the sealing block 52 of the detection hole sealing assembly 5 away from the sealing seat 51. After the sealing slider 53 leaves the sealing block 52, the sealing block spring 54 resets and pushes the sealing block 52 to move downward. The upper and lower guide grooves 521 move downward along the first upper and lower guide blocks 511 and act on the top plate of the telescopic panel assembly 1. The second sealing sponge 56 is squeezed between the sealing block 52 and the top surface of the telescopic panel assembly 1, sealing the gap between the sealing block 52 and the top surface of the telescopic panel assembly 1, so that the air in the telescopic inner cavity a cannot enter the PM2.5 detection unit 2 through the first detection hole 11 on the top plate of the telescopic panel assembly 1.

[0063] Please refer to Figures 3, 8 to 11. The PM2.5 detection module of the present application, the PM2.5 detection unit 2 includes a detection shell 21 and a PM2.5 detection component 22 arranged in the detection shell 21. The detection shell 21 is provided with a mutually independent detection air intake channel 211 and a detection exhaust channel 212. The upper end openings of the detection air intake channel 211 and the detection exhaust channel 212 abut the top surface of the telescopic panel assembly 1 and are aligned with the first detection hole 11. The lower end openings of the detection air intake channel 211 and the detection exhaust channel 212 abut the bottom surface of the telescopic panel assembly 1 and are aligned with the second detection hole 12. The air intake side of the PM2.5 detection component 22 is connected to the detection air intake channel 211, and the exhaust side of the PM2.5 detection component 22 is connected to the detection exhaust channel 212. The PM2.5 detection module of the present application, after being used on the range hood, when the range hood is working, the telescopic panel assembly 1 extends out of the telescopic inner cavity a, at this time the first detection hole 11 is located outside the telescopic inner cavity a, the second detection hole 12 is located inside the telescopic inner cavity a, the sealing assembly 4 seals the gap between the lower surface of the telescopic panel assembly 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 assembly 1, and the air enters the detection air inlet channel 211 through the part of the first detection hole 11 that is aligned with the detection air inlet channel 211, and after being detected by the PM2.5 detection component 22, it is discharged into the detection exhaust channel 212 and discharged; after the smoke exhaust fan is turned off, the PM2.5 detection component 22 extends out of the telescopic inner cavity a, and the second detection hole 11 is located outside the telescopic inner cavity a, and the second detection hole 12 is located inside the telescopic inner cavity a, and the sealing assembly 4 seals the gap between the lower surface of the telescopic panel assembly 1 and the opening of the telescopic inner cavity a. The retractable panel assembly 1 retracts the telescopic inner cavity a, the detection hole sealing assembly 5 seals the first detection hole 11, and the detection hole switch assembly 3 connects the third detection hole a1 with the second detection hole 12. After the PM2.5 detection component 22 is started, the air outside the telescopic inner cavity a passes through the third detection hole a1, the air inlet duct 311, the air inlet extension duct 321, and the second detection hole 12 in sequence into the lower end opening of the detection air inlet channel 211, and 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 12, the exhaust extension duct 322, the exhaust duct 312 and the third 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 is connected to the third detection hole a1 and the second detection hole 12. The air detected by the PM2.5 detection component 22 comes from the bottom of the telescopic inner cavity a, which is close to the air intake of the range hood. 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 exhaust fan.

[0064] In the PM2.5 detection module of the present application, the driving component 8 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 a slide rail component. The two sides of the telescopic panel component 1 are connected to the movable rail 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.

[0065] In one embodiment, the driving component 8 of the PM2.5 detection module of the present application can also adopt the method of a motor-driven screw. The driving end of the motor is connected to the screw, and a nut is connected to the screw. The nut is connected to the telescopic panel assembly 1. The two side walls of the telescopic inner cavity a are provided with a slide rail assembly. The two sides of the telescopic panel assembly 1 are connected to the movable rail 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.

[0066] Please refer to Figures 1, 8 and 9. The present application also discloses a range hood. The range hood disclosed in the present application adopts the above-mentioned PM2.5 detection module. An air collecting box assembly 9 is also provided in the main body. A smoke exhaust fan 91 is provided in the air collecting box assembly 9. The smoke exhaust fan 91, the PM2.5 detection unit 2 and the drive assembly 8 are connected to the control system of the range hood. The control system links the smoke exhaust fan 91 and the PM2.5 detection unit 2. When the range hood is working, the smoke exhaust fan 91 of the range hood is started, and at the same time the driving assembly 8 is started and drives the telescopic panel assembly 1 to extend from the telescopic inner cavity a, the first detection hole 11 extends out of the telescopic inner cavity a, the sealing assembly 4 seals the gap between the telescopic panel assembly 1 and the opening of the telescopic inner cavity a, and the connecting channel between the third detection hole a1 and the second detection hole 12 is sealed by the detection hole switch assembly 3. The oil smoke generated by cooking cannot enter the telescopic inner cavity through the gap between the telescopic panel assembly 1 and the opening of the telescopic inner cavity a, and the oil smoke cannot enter the second detection hole 12 through the third detection hole a1. The air detected by the PM2.5 detection unit 2 is the air above the telescopic panel assembly 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. When the PM2.5 detection unit 2 is linked with the control system of the range hood, the control system of the range hood can adjust the power of the smoke exhaust fan according to the PM2.5 content value detected by the PM2.5 detection unit 2. After cooking is finished and the smoke exhaust fan 91 is turned off, the driving assembly 8 drives the telescopic panel assembly 1 to retract the telescopic inner cavity a, the detection hole sealing assembly 5 seals the first detection hole 11 on the top of the telescopic panel assembly 1, and the detection hole switch assembly 3 connects the third detection hole a1 and the second detection hole 12. The air below the telescopic inner cavity a enters the second detection hole 12 through the third detection hole a1, the air inlet duct 311, and the air inlet extension duct 321, and then enters the detection air inlet duct 211 from the second detection hole 12. After being detected by the PM2.5 detection element 22, it is discharged into the detection exhaust duct 212, and then enters the exhaust extension duct 322 and the exhaust duct 312 in sequence through the second detection hole 12, and is finally discharged from the third detection hole a1.

[0067] The above are merely embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, or improvements made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A PM2.5 detection module for a range hood, wherein: The PM2.5 detection module includes: A main body, comprising a frame assembly (6) and a cover assembly (7), wherein the frame assembly (6) and the cover assembly (7) are connected to form a telescopic inner cavity (a), and a third detection hole (a1) is provided at the bottom of the frame assembly (6); A telescopic panel assembly (1) is slidably connected in the telescopic inner cavity (a), a first detection hole (11) is provided on the top, and a second detection hole (12) is provided on the bottom; A PM2.5 detection unit (2), which is arranged in the installation cavity of the telescopic panel assembly (1); A driving assembly (8) disposed in the telescopic inner cavity (a), the driving assembly (8) being connected to the telescopic panel assembly (1) and being used to drive the telescopic panel assembly (1) to extend out of 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 third detection hole (a1) through the second detection hole (12), and the third detection hole (a1) is connected to the outside.

2. The PM2.5 detection module according to claim 1, wherein: When the telescopic panel assembly (1) extends out of the telescopic inner cavity (a), the third detection hole (a1) is sealed, and the second detection hole (12) is sealed in the telescopic inner cavity (a); when the telescopic panel assembly (1) retracts into the telescopic inner cavity (a), the first detection hole (11) is sealed, the second detection hole (12) is connected to the third detection hole (a1), and the third detection hole (a1) is connected to the outside.

3. The PM2.5 detection module according to claim 1, wherein: 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 third detection hole (a1); when the telescopic panel assembly (1) retracts into the telescopic inner cavity (a), the detection hole switch assembly (3) opens the third detection hole (a1) and connects the third detection hole (a1) with the second detection hole (12).

4. The PM2.5 detection module according to claim 3, wherein: 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 third 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 switch slider (33) acts on the extension seat (32) and seals the air passage, the extension seat spring (34) is compressed; when the switch slider (33) leaves the extension seat (32) and opens the air passage, the switch slider spring (35) is compressed, the extension seat spring (34) is reset and drives the extension seat (32) to move upward.

5. The PM2.5 detection module according to claim 4, wherein: The air duct comprises an air inlet duct (311) and an exhaust duct (312) which are aligned with the third 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 into 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 upward along the air inlet duct (311) and the exhaust duct (312) and abut against the second detection hole (12).

6. The PM2.5 detection module according to claim 1, wherein: The PM2.5 detection module further comprises a sealing component (4), wherein the first detection hole (11) is located at the front side of the sealing component (4), and the second detection hole (12) is located at the rear side of the sealing component (4), and the sealing component (4) is used for sealing at least a gap between a lower surface of the telescopic panel component (1) and an opening of the telescopic inner cavity (a) when the telescopic panel component (1) extends out of the telescopic inner cavity (a).

7. The PM2.5 detection module according to claim 1, wherein: A detection hole sealing component (5) is provided in the telescopic inner cavity (a); when the telescopic panel component (1) is retracted into the telescopic inner cavity (a), the detection hole sealing component (5) seals the first detection hole (11).

8. The PM2.5 detection module according to claim 7, wherein: The detection hole sealing assembly (5) comprises a sealing seat (51), a sealing block (52) and a sealing slider (53); the sealing seat (51) is connected to the top of the telescopic inner cavity (a); the sealing block (52) is connected to the sealing seat (51) by sliding up and down; a sealing block spring (54) is provided between the sealing block (52) and the sealing seat (51); the sealing slider (53) is connected to the sealing seat (51) by sliding forward and backward; a sealing slider spring (55) is connected to the rear end of the sealing slider (53); when the sealing slider (53) acts on the sealing block (52), the sealing block spring (54) is compressed; when the sealing slider (53) leaves the sealing block (52), the sealing slider spring (55) is compressed, and the sealing block spring (54) is reset and pushes the sealing block (52) to move downward.

9. The PM2.5 detection module according to claim 1, wherein: 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 upper end 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 lower end openings of the detection air intake channel (211) and the detection air exhaust channel (212) abut against the bottom surface of the telescopic panel assembly (1) and are aligned with the second detection hole (12); 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. A range hood, using the PM2.5 detection module according to any one of claims 1 to 9, wherein: The main body is also provided with an air collecting box assembly (9), wherein a smoke exhaust fan (91) is provided in the air collecting box assembly (9), and the smoke exhaust fan (91), the PM2.5 detection unit (2) and the drive assembly (8) are connected to a control system of the smoke exhaust fan, and the control system enables the smoke exhaust fan (91) and the PM2.5 detection unit (2) to be linked.

Images