Sensor assembly for measuring air pressure change and air purifier

Abstract

The sensor assembly for measuring the air pressure change comprises a cylinder body, a supporting piece, a force detection assembly and a cover body assembly, the cylinder body has rigidity and is provided with a containing cavity and an opening communicated with the containing cavity, the supporting piece is arranged in the containing cavity and connected with the cylinder body, and the force detection assembly is arranged on the supporting piece. The force detection assembly is arranged in the containing cavity and comprises an elastic body and a strain gauge arranged on the elastic body, one end of the elastic body is connected with the supporting piece, the strain gauge is used for detecting the deformation quantity of the elastic body, and the cover body assembly comprises a first connecting piece, a second connecting piece and a flexible piece arranged between the first connecting piece and the second connecting piece. The first connecting piece is connected to the opening, and the second connecting piece is connected with the other end of the elastic body, so that the number of the sensors can be reduced, and the detection error of the force detection assembly can be reduced.

Description

Technical Field

[0001] The present invention relates to the field of sensor technology, and in particular to a sensor component for measuring air pressure changes and an air purifier. Background Art

[0002] After long-term use, the filter inside the existing air purifier is easily clogged with pollutants, and the filter needs to be replaced in time. The existing air purifier detects the air quality through an air quality sensor to determine whether the filter has reached its service life. The air quality sensor can be a dust sensor or a VOC sensor. Taking the dust sensor as an example, it is necessary to set dust sensors at the front and rear ends of the filter respectively, and compare and analyze the difference in the values ​​obtained by the front dust sensor and the rear dust sensor to determine whether the filter has reached its service life. The above method of measuring whether the filter has reached its service life leads to an increase in the number of air quality sensors used and a high production cost. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a sensor assembly for measuring air pressure changes, which can reduce the number of sensors and reduce the detection error of the force detection assembly.

[0004] The present invention also provides an air purifier having the sensor assembly for measuring air pressure changes.

[0005] A sensor assembly for measuring air pressure changes according to a first aspect of the present invention includes:

[0006] A cylinder body, provided with a receiving cavity and an opening communicating with the receiving cavity;

[0007] A support member, disposed in the accommodating cavity and connected to the cylinder;

[0008] A force detection component is arranged in the accommodating cavity, the force detection component comprises an elastic body and a strain gauge arranged on the elastic body, one end of the elastic body is connected to the supporting member, and the strain gauge is used to detect the deformation amount of the elastic body;

[0009] The cover assembly comprises a first connecting member, a second connecting member and a flexible member arranged between the first connecting member and the second connecting member, wherein the first connecting member is connected to the opening, and the second connecting member is connected to the other end of the elastic body.

[0010] The sensor assembly for measuring air pressure changes according to the first aspect of the present invention has at least the following beneficial effects:

[0011] The filter element of the air purifier is a cylindrical structure. The interior of the filter element is hollow. A fan is arranged at one end of the filter element. The sensor component for measuring air pressure changes blocks the other end of the filter element. The interior of the filter element is connected with the outside of the filter element through the mesh of the filter element. The outside air is introduced into the interior of the filter element from all sides of the filter element through the fan. When the sensor component for measuring air pressure changes is used, the cover assembly is located on the outside of the filter element. When the filter screen has not reached the service life limit, the outside air can enter the inner cavity normally. The air pressure in the inner cavity is balanced with the air pressure of the outside air. The movement of the second connecting piece is small, that is, the elastic body The deformation amount is small. When the filter reaches the service life limit, the outside air cannot enter the inner cavity normally. The inner cavity is in a negative pressure state on the left and right sides of the fan. Since the second connecting member is connected to the first connecting member through a flexible member, the second connecting member can move relative to the first connecting member. The second connecting member directly transmits the collision force to the elastomer, causing the elastomer to undergo elastic deformation. The strain gauge can obtain the deformation amount of the elastomer. The size of the deformation amount of the elastomer can be used to determine whether the filter has reached the service life limit. This can not only reduce the number of sensors, but also reduce the detection error of the force detection component.

[0012] According to some embodiments of the present invention, a through hole is provided in the middle of the support member, and the other end of the elastic body extends to the inner side of the through hole.

[0013] According to some embodiments of the present invention, the other end of the elastic body is connected to a middle position of the second connecting member.

[0014] According to some embodiments of the present invention, the flexible member is provided with an annular groove, the annular groove is arranged around the axis of the accommodating cavity, and the annular groove is located between the first connecting member and the second connecting member.

[0015] According to some embodiments of the present invention, the flexible member includes a first annular portion, a second annular portion, and a deformation portion arranged between the first annular portion and the second annular portion, the first annular portion is connected to the first connecting member, the second annular portion is connected to the second connecting member, and the annular groove is arranged in the deformation portion.

[0016] According to some embodiments of the present invention, the first connecting member is detachably connected to the cylinder, the first connecting member and the cylinder form a first installation groove, and the first annular portion is installed in the first installation groove.

[0017] According to some embodiments of the present invention, the cover body assembly also includes a fixing plate, which is detachably connected to the second connecting member, the second connecting member is provided with a second mounting groove, the second annular portion is installed in the second mounting groove, and the fixing plate cover is arranged in the second mounting groove.

[0018] According to some embodiments of the present invention, a circuit board is further included. The circuit board is provided with a data processing module. The strain gauge is electrically connected to the data processing module. The data processing module is used to convert the deformation data obtained by the strain gauge into service life data.

[0019] According to some embodiments of the present invention, a power supply module is further included, and the power supply module is used to supply power to the circuit board.

[0020] An air purifier according to an embodiment of the second aspect of the present invention includes the sensor assembly for measuring air pressure changes as described in the above embodiment.

[0021] The air purifier according to the second aspect of the present invention has at least the following beneficial effects:

[0022] The filter element of the air purifier is a cylindrical structure. The interior of the filter element is hollow. A fan is provided at one end of the filter element. A sensor component for measuring air pressure changes blocks the other end of the filter element. The interior of the filter element is connected to the outside of the filter element through the mesh of the filter element. The outside air is introduced into the interior of the filter element from all sides of the filter element through the fan. When the filter has not reached the service life limit, the outside air can enter the inner cavity normally. The air pressure in the inner cavity is balanced with the air pressure of the outside air. The movement of the second connecting piece is small, that is, the deformation of the elastic body is small. When the filter reaches the service life limit, the outside air cannot enter the inner cavity normally. On the left and right of the fan, the inner cavity is in a negative pressure state. Since the second connecting piece is connected to the first connecting piece through a flexible piece, the second connecting piece can move relative to the first connecting piece. The second connecting piece directly transmits the collision force to the elastic body, causing the elastic body to undergo elastic deformation. The strain gauge can obtain the deformation of the elastic body. The deformation of the elastic body can be used to determine whether the filter has reached the service life limit. This can reduce the number of sensors and reduce the detection error of the force detection component.

[0023] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0025] Figure 1 A schematic diagram of the structure of a sensor assembly for measuring air pressure changes according to an embodiment of the present invention;

[0026] Figure 2 It is an exploded schematic diagram of a sensor assembly for measuring air pressure changes according to an embodiment of the present invention;

[0027] Figure 3 for Figure 1A top view of

[0028] Figure 4 for Figure 3 Sectional view along line AA;

[0029] Figure 5 is an exploded schematic diagram of a cover assembly according to an embodiment of the present invention;

[0030] Figure 6 It is a structural schematic diagram of a cylinder according to an embodiment of the present invention;

[0031] Figure 7 It is a structural schematic diagram of a cover assembly according to an embodiment of the present invention;

[0032] Figure 8 for Figure 7 Bottom view of

[0033] Fig. 9 for Figure 8 Cross-sectional view along line BB.

[0034] Reference numerals:

[0035] The cylinder 100, the accommodating cavity 110, the opening 111, the first groove 120, the first hook 130, the support member 200, the through hole 210, the elastomer 300, the cover body assembly 400, the first connecting member 410, the second groove 411, the second connecting member 420, the second mounting groove 421, the second hook 422, the flexible member 430, the annular groove 431, the first annular portion 432, the second annular portion 433, the deformation portion 434, the fixing plate 440, the circuit board 500, and the power supply module 600. DETAILED DESCRIPTION

[0036] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0037] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0038] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0039] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0040] In the related art, the existing air purifier detects the air quality through an air quality sensor to determine whether the filter has reached its service life. The air quality sensor can be a dust sensor or a VOC sensor. Taking the dust sensor as an example, it is necessary to set dust sensors at the front and rear ends of the filter respectively, and compare and analyze the difference between the values ​​obtained by the front dust sensor and the rear dust sensor to determine whether the filter has reached its service life. The above method of measuring whether the filter has reached its service life leads to an increase in the number of air quality sensors used and a high production cost.

[0041] Reference Figures 1 to 4 According to the first embodiment of the present invention, the sensor assembly for measuring air pressure changes includes a cylinder 100, a support member 200, a force detection assembly and a cover assembly 400. The cylinder 100 has rigidity. The cylinder 100 is provided with a receiving cavity 110 and an opening 111 communicating with the receiving cavity 110. The support member 200 is disposed in the receiving cavity 110 and connected to the cylinder 100. The force detection assembly is disposed in the receiving cavity 110. The force detection assembly includes an elastic body 300 and a strain gauge disposed on the elastic body 300. One end of the elastic body 300 is connected to the support member 200. The strain gauge is used to detect the elastic body 300. 00, the cover body assembly 400 includes a first connecting member 410, a second connecting member 420 and a flexible member 430 arranged between the first connecting member 410 and the second connecting member 420, the first connecting member 410 is connected to the opening 111, and the second connecting member 420 is connected to the other end of the elastomer 300. In this way, the sensor assembly for measuring the air pressure change can obtain the force exerted on the elastomer 300 through the deformation of the elastomer 300, and then determine whether the filter has reached the service life limit, which can not only reduce the number of sensors, but also reduce the detection error of the force detection assembly.

[0042] Specifically, the filter element of the air purifier is a cylindrical structure, the interior of the filter element is hollow, a fan is arranged at one end of the filter element, a sensor component for measuring air pressure changes blocks the other end of the filter element, the interior of the filter element is connected with the outside of the filter element through the mesh of the filter element, and the outside air is introduced into the interior of the filter element from all sides of the filter element through the fan. When the filter has not reached the limit of its service life, the outside air can enter the inner cavity normally, and the air pressure in the inner cavity is balanced with the air pressure of the outside air. The movement of the second connecting piece is small, that is, the deformation of the elastic body 300 is small. When the filter reaches the limit of its service life, the outside air cannot enter the inner cavity normally. It often enters the inner cavity. On the left and right sides of the fan, the inner cavity is in a negative pressure state. Since the second connecting member 420 is connected to the first connecting member 410 through the flexible member 430, the second connecting member 420 can move relative to the first connecting member 410. The second connecting member 420 directly transmits the collision force to the elastomer 300, causing the elastomer 300 to undergo elastic deformation. The strain gauge can obtain the deformation amount of the elastomer 300. The deformation amount of the elastomer 300 can be used to determine whether the filter has reached its service life limit, which can reduce the number of sensors and reduce the detection error of the force detection component.

[0043] Reference Figure 2 In some embodiments of the present invention, a through hole 210 is provided in the middle of the support member 200, and the other end of the elastomer 300 extends to the inner side of the through hole 210, so that the end of the elastomer 300 connected to the second connecting member 420 is suspended relative to the support member 200, which can increase the deformation of the elastomer 300, which is beneficial for the strain gauge to detect the deformation of the elastomer 300, thereby reducing the detection error.

[0044] Specifically, along the axial direction of the cylinder 100, the through hole 210 passes through the support member 200, one end of the elastomer 300 is connected to the support member 200, and the other end of the elastomer 300 protrudes from the hole wall of the through hole 210, so that the end of the elastomer 300 connected to the second connecting member 420 is suspended relative to the support member 200, which can increase the deformation of the elastomer 300, which is beneficial to the strain gauge to detect the deformation of the elastomer 300, thereby reducing the detection error.

[0045] Reference Figure 4 In some embodiments of the present invention, the other end of the elastic body 300 is connected to the middle position of the second connecting member 420, so that the other end of the elastic body 300 is evenly stressed, which can reduce the detection error of the force detection component.

[0046] Reference Figure 4 , Figure 8 and Fig. 9In some embodiments of the present invention, the flexible member 430 is provided with an annular groove 431, which is arranged around the axis of the accommodating cavity 110. The annular groove 431 is located between the first connecting member 410 and the second connecting member 420, so that the width of the annular groove 431 can be increased or decreased, which can increase the deformation of the flexible member 430 and facilitate the movement of the second connecting member 420 in a direction close to or away from the elastomer 300.

[0047] Specifically, the annular groove 431 is an annular structure. Along the radial direction of the second connecting member 420, the annular groove 431 is located between the first connecting member 410 and the second connecting member 420. When the second connecting member 420 moves in a direction close to the elastomer 300, the width of the annular groove 431 increases and the depth decreases. When the second connecting member 420 moves in a direction away from the elastomer 300, the width of the annular groove 431 decreases and the depth increases, which is beneficial for the second connecting member 420 to move in a direction close to or away from the elastomer 300.

[0048] It should be noted that the flexible member 430 is also elastic and is made of rubber or silicone material so that the flexible member 430 can automatically return to its original state.

[0049] Reference Figure 4 , Figure 5 In some embodiments of the present invention, the flexible member 430 includes a first annular portion 432, a second annular portion 433, and a deformation portion 434 disposed between the first annular portion 432 and the second annular portion 433. The first annular portion 432 is connected to the first connecting member 410, the second annular portion 433 is connected to the second connecting member 420, and an annular groove 431 is disposed on the deformation portion 434, which can facilitate the assembly of the flexible member 430.

[0050] Specifically, on the cross section passing through the axis of the first annular portion 432, the contour line of the deformation portion 434 is a U-shaped structure, the outer side of the deformation portion 434 is connected to the inner side of the first annular portion 432, the outer side of the first annular portion 432 is connected to the first connecting member 410, the inner side of the deformation portion 434 is connected to the outer side of the second annular portion 433, and the inner side of the second annular portion 433 is connected to the outer side of the second connecting member 420, which can facilitate the assembly of the flexible part 430.

[0051] It should be noted that the first annular portion 432 , the second annular portion 433 and the deformable portion 434 are an integrated structure, which can reduce the number of molds to reduce the production cost of the molds, thereby reducing the production cost of the cover assembly 400 , which will not be repeated here.

[0052] Reference Figure 4 , Figure 6In some embodiments of the present invention, the first connecting member 410 is detachably connected to the barrel 100, and the first connecting member 410 and the barrel 100 are enclosed to form a first installation groove, and the first annular portion 432 is installed in the first installation groove, which can facilitate the assembly of the flexible member 430.

[0053] Specifically, a first groove 120 is provided at the end of the side wall of the accommodating cavity 110, a first hook 130 is provided at the periphery of the notch of the first groove 120, and a second groove 411 is provided on the outer peripheral surface of the first connecting member 410. The first groove 120 and the second groove 411 are enclosed to form a first installation groove. When the first connecting member 410 is connected to the cylinder body 100, the first annular portion 432 is accommodated in the first installation groove, and the side of the first connecting member 410 away from the elastomer 300 abuts against the hook portion of the first hook 130 to limit the first connecting member 410 from withdrawing from the first groove 120, which can facilitate the assembly of the flexible member 430.

[0054] It should be noted that the first connecting member 410 can also be detachably connected to the cylinder body 100 by bolting, which is not limited here.

[0055] Reference Figure 4 , Figure 5 and Figure 7 In some embodiments of the present invention, the cover body assembly 400 also includes a fixing plate 440, which is detachably connected to the second connecting member 420. The second connecting member 420 is provided with a second mounting groove 421, and the second annular portion 433 is installed in the second mounting groove 421. The fixing plate 440 covers the second mounting groove 421 and can limit the second annular portion 433 from withdrawing from the second mounting groove 421, thereby facilitating the assembly of the second connecting member 420 and the flexible member 430.

[0056] Specifically, the second mounting groove 421 is an annular structure, and the second connecting member 420 is provided with a second hook 422. The hook portion of the second hook 422 abuts against the side of the fixing plate 440 away from the second mounting groove 421 to limit the second annular portion 433 from withdrawing from the second mounting groove 421, thereby facilitating the assembly of the second connecting member 420 and the flexible member 430.

[0057] Reference Figures 2 to 4 In some embodiments of the present invention, a circuit board 500 is further included. The circuit board 500 is provided with a data processing module. The strain gauge is electrically connected to the data processing module. The data processing module is used to convert the deformation data obtained by the strain gauge into service life data, which can intuitively determine whether the filter has reached its service life, thereby improving the user experience.

[0058] Reference Figures 2 to 4In some embodiments of the present invention, a power supply module 600 is further included. The power supply module 600 is used to supply power to the circuit board 500. The power supply module 600 can be a battery or an external power supply, which can ensure that the force detection component can work normally.

[0059] The air purifier according to the second embodiment of the present invention includes the sensor component for measuring air pressure changes according to the first embodiment of the present invention, which can reduce the number of sensors and reduce the detection error of the force detection component.

[0060] Specifically, the filter element of the air purifier is a cylindrical structure. The interior of the filter element is hollow. A fan is provided at one end of the filter element. A sensor component for measuring air pressure changes blocks the other end of the filter element. The interior of the filter element is connected to the outside of the filter element through the mesh of the filter element. The outside air is introduced into the interior of the filter element from all sides of the filter element through the fan. When the filter has not reached the limit of its service life, the outside air can enter the inner cavity normally. The air pressure in the inner cavity is balanced with the air pressure of the outside air. The movement of the second connecting piece is small, that is, the deformation of the elastomer 300 is small. When the filter reaches the limit of its service life, the outside air cannot enter the inner cavity normally. It often enters the inner cavity. On the left and right sides of the fan, the inner cavity is in a negative pressure state. Since the second connecting member 420 is connected to the first connecting member 410 through the flexible member 430, the second connecting member 420 can move relative to the first connecting member 410. The second connecting member 420 directly transmits the collision force to the elastomer 300, causing the elastomer 300 to undergo elastic deformation. The strain gauge can obtain the deformation amount of the elastomer 300. The deformation amount of the elastomer 300 can be used to determine whether the filter has reached its service life limit, which can reduce the number of sensors and reduce the detection error of the force detection component.

[0061] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0062] The present embodiment is described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiment, and various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the present purpose.

Claims

1. A sensor assembly for measuring air pressure changes, characterized in that: include: The cylinder (100) is provided with a receiving cavity (110) and an opening (111) communicating with the receiving cavity (110); A support member (200) is disposed in the accommodating cavity (110) and connected to the cylinder (100); a force detection component, disposed in the accommodating cavity (110), the force detection component comprising an elastic body (300) and a strain gauge disposed on the elastic body (300), one end of the elastic body (300) being connected to the support member (200), and the strain gauge being used to detect the deformation amount of the elastic body (300); The cover assembly (400) includes a first connecting member (410), a second connecting member (420), and a flexible member (430) disposed between the first connecting member (410) and the second connecting member (420), wherein the first connecting member (410) is connected to the opening (111), and the second connecting member (420) is connected to the other end of the elastomer (300).

2. The sensor assembly for measuring air pressure changes according to claim 1, characterized in that: A through hole (210) is provided in the middle of the support member (200), and the other end of the elastic body (300) extends to the inner side of the through hole (210).

3. The sensor assembly for measuring air pressure changes according to claim 1, characterized in that: The other end of the elastic body (300) is connected to the middle position of the second connecting member (420).

4. The sensor assembly for measuring air pressure changes according to claim 1, characterized in that: The flexible member (430) is provided with an annular groove (431), the annular groove (431) is arranged around the axis of the accommodating cavity (110), and the annular groove (431) is located between the first connecting member (410) and the second connecting member (420).

5. The sensor assembly for measuring air pressure changes according to claim 4, characterized in that: The flexible member (430) includes a first annular portion (432), a second annular portion (433), and a deformation portion (434) disposed between the first annular portion (432) and the second annular portion (433), the first annular portion (432) being connected to the first connecting member (410), the second annular portion (433) being connected to the second connecting member (420), and the annular groove (431) being disposed on the deformation portion (434).

6. The sensor assembly for measuring air pressure changes according to claim 5, characterized in that: The first connecting member (410) is detachably connected to the cylinder (100), the first connecting member (410) and the cylinder (100) are combined to form a first installation groove, and the first annular portion (432) is installed in the first installation groove.

7. The sensor assembly for measuring air pressure changes according to claim 5, characterized in that: The cover assembly (400) further comprises a fixing plate (440), wherein the fixing plate (440) is detachably connected to the second connecting member (420), the second connecting member (420) is provided with a second mounting groove (421), the second annular portion (433) is installed in the second mounting groove (421), and the fixing plate (440) is covered in the second mounting groove (421).

8. The sensor assembly for measuring air pressure changes according to claim 1, characterized in that: It also includes a circuit board (500), the circuit board (500) being provided with a data processing module, the strain gauge being electrically connected to the data processing module, and the data processing module being used to convert deformation data obtained by the strain gauge into service life data.

9. The sensor assembly for measuring air pressure changes according to claim 8, characterized in that: It also includes a power supply module (600), and the power supply module (600) is used to supply power to the circuit board (500).

10. An air purifier, characterized in that: A sensor assembly for measuring air pressure changes comprising the sensor assembly as claimed in any one of claims 1 to 9.

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