Sensor assembly for measuring air pressure change and air purifier

Abstract

The utility model discloses a sensor assembly for measuring air pressure change and discloses an air purifier, the sensor assembly for measuring air pressure change comprises a cylinder body, a support member, a force detection assembly and a cover body assembly, the cylinder body has rigidity, the cylinder body is provided with an accommodating cavity and an opening communicated with the accommodating cavity, the supporting piece is arranged in the containing cavity and connected with the barrel, 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, and the strain gauge is used for detecting the deformation quantity of the elastic body. 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, the second connecting piece is connected with the other end of the elastic body, 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 utility model relates to sensor technical field, especially a kind of sensor assembly of measuring air pressure change and air purifier. BACKGROUND

[0002] The filter screen inside the air purifier is easily blocked by pollutants after long-term use, and the filter screen needs to be replaced in time. The existing air purifier detects air quality through an air quality sensor to determine whether the filter screen has reached its service life. The air quality sensor can be a dust sensor or a VOC sensor, etc. For example, a dust sensor is needed at the front end and rear end of the filter screen. The difference between the values obtained by the dust sensor at the front end and the dust sensor at the rear end is compared and analyzed to determine whether the filter screen has reached its service life. The above-mentioned method of measuring whether the filter screen has reached its service life increases the number of air quality sensors used and has a high production cost. SUMMARY

[0003] The utility model aims at at least one of the technical problems existing in the prior art. To this end, the utility model 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 utility model further provides an air purifier with the above-mentioned sensor assembly for measuring air pressure changes.

[0005] According to the first aspect embodiment of the utility model, the sensor assembly for measuring air pressure changes comprises:

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

[0007] The support is arranged in the receiving cavity and connected with the cylinder body;

[0008] The force detection assembly is arranged in the receiving cavity, and the force detection assembly comprises an elastic body and a strain gauge arranged on the elastic body. One end of the elastic body is connected with the support, and the strain gauge is used to detect the deformation amount of the elastic body.

[0009] The cover 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 to the other end of the elastic body.

[0010] According to the first aspect embodiment of the utility model, the sensor assembly for measuring air pressure changes has at least the following beneficial effects:

[0011] The filter element of the air purifier is in a cylindrical structure, the inside of the filter element is hollow, one end of the filter element is provided with a fan, a sensor assembly for measuring air pressure change blocks the other end of the filter element, the inside of the filter element is communicated with the outside of the filter element through the mesh of the filter element, outside air is introduced into the inside of the filter element from the periphery of the filter element through the fan, the cover assembly is located outside the filter element when the sensor assembly for measuring air pressure change is used, when the filter screen does not reach the service life limit, outside air can normally enter the inner cavity, the air pressure in the inner cavity is balanced with the air pressure of the outside air, the moving amount of the second connecting piece is small, that is, the deformation amount of the elastic body is small, when the filter screen reaches the service life limit, outside air cannot normally enter the inner cavity, under the action of the fan, the inner cavity is in a negative pressure state, since the second connecting piece is connected with the first connecting piece through the flexible piece, the second connecting piece can move relative to the first connecting piece, the second connecting piece directly transmits the impact force to the elastic body, so that the elastic body elastically deforms, the strain gauge can obtain the deformation amount of the elastic body, whether the filter screen reaches the service life limit can be judged by the size of the deformation amount of the elastic body, the number of sensors can be reduced, and the detection error of the force detection assembly can be reduced.

[0012] According to some embodiments of the present application, the middle position of the supporting member is provided with a through hole, and the other end of the elastic body extends to the inside of the through hole.

[0013] According to some embodiments of the present application, the other end of the elastic body is connected with the middle position of the second connecting piece.

[0014] According to some embodiments of the present application, the flexible piece 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 piece and the second connecting piece.

[0015] According to some embodiments of the present application, the flexible piece comprises a first annular part, a second annular part, and a deformation part arranged between the first annular part and the second annular part, the first annular part is connected with the first connecting piece, the second annular part is connected with the second connecting piece, and the annular groove is arranged in the deformation part.

[0016] According to some embodiments of the present application, the first connecting piece is detachably connected with the barrel, the first connecting piece and the barrel form a first mounting groove, and the first annular part is mounted in the first mounting groove.

[0017] According to some embodiments of the present application, the cover assembly further comprises a fixed plate, the fixed plate is detachably connected with the second connecting piece, the second connecting piece is provided with a second mounting groove, the second annular part is mounted in the second mounting groove, and the fixed plate covers the second mounting groove.

[0018] According to some embodiments of the present invention, a circuit board is also 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 also included, which is used to supply power to the circuit board.

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

[0021] An air purifier according to a second aspect embodiment of the present invention has at least the following features:

[0022] Beneficial effects:

[0023] The air purifier's filter has a cylindrical structure with a hollow interior. A fan is located at one end of the filter, while a sensor assembly measuring air pressure changes seals the other end. The interior of the filter is connected to the outside world through its mesh. Outside air is introduced into the filter from all sides by the fan. When the filter hasn't reached its lifespan limit, outside air can enter the inner cavity normally, and the air pressure inside the cavity is balanced with the outside air pressure. The movement of the second connector is small, meaning the deformation of the elastic body is small. When the filter reaches its lifespan limit, outside air cannot enter the inner cavity normally. Under the influence of the fan, the inner cavity is under negative pressure. Because the second connector is connected to the first connector via a flexible component, the second connector can move relative to the first connector. The second connector directly transmits the impact force to the elastic body, causing elastic deformation. Strain gauges can measure the deformation of the elastic body. The magnitude of this deformation can be used to determine whether the filter has reached its lifespan limit. This reduces the number of sensors and lowers the detection error of the force detection component.

[0024] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0025] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0026] Figure 1 This is a schematic diagram of the sensor assembly for measuring air pressure changes according to an embodiment of the present invention;

[0027] Figure 2 This is an exploded view of the sensor assembly for measuring air pressure changes according to an embodiment of the present invention;

[0028] Figure 3 for Figure 1 Top view;

[0029] Figure 4 for Figure 3 Sectional view of line AA in the middle;

[0030] Figure 5 This is an exploded view of the cover assembly according to an embodiment of the present utility model;

[0031] Figure 6 This is a schematic diagram of the structure of the cylinder according to an embodiment of the present utility model;

[0032] Figure 7 This is a schematic diagram of the structure of the cover assembly according to an embodiment of the present utility model;

[0033] Figure 8 for Figure 7 A bottom view;

[0034] Figure 9 for Figure 8 A cross-sectional view along the BB line.

[0035] Figure label:

[0036] The components include: cylinder 100, receiving cavity 110, opening 111, first groove 120, first hook 130, support member 200, through hole 210, elastic body 300, cover assembly 400, first connector 410, second groove 411, second connector 420, second mounting groove 421, second hook 422, flexible member 430, annular groove 431, first annular part 432, second annular part 433, deformable part 434, fixing plate 440, circuit board 500, and power supply module 600. Detailed Implementation

[0037] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0038] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0039] In the description of the utility model, if several meanings are one or more, the meaning of multiple is two or more, greater than, less than, more than, etc. Understand as not including the number, above, below, within, etc. Understand as including the number. If it is described to the first, the second is only used for distinguishing the purpose of technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the relationship between the indicated technical features.

[0040] In the description of the utility model, unless otherwise explicitly limited, the words such as setting, installation, connection, etc. Should be broadly understood, and the person skilled in the art can reasonably determine the specific meaning of the above words in the utility model combined with the specific content of the technical scheme.

[0041] In the related art, the existing air purifier detects air quality through an air quality sensor to determine whether the filter screen reaches the service life, and the air quality sensor can be a dust sensor or a VOC sensor, etc. Taking the dust sensor as an example, the dust sensor needs to be arranged at the front end and the rear end of the filter screen respectively, and the difference between the values obtained by the dust sensor at the front end and the dust sensor at the rear end is compared and analyzed to determine whether the filter screen reaches the service life. The above-mentioned method for measuring whether the filter screen reaches the service life causes the number of air quality sensors to increase, and the production cost is higher.

[0042] Reference Figures 1 to 4 According to the sensor assembly for measuring air pressure change, the force detection assembly can obtain the force borne by the elastic body 300 through the deformation amount of the elastic body 300, and then determine whether the filter screen reaches the service life limit, which can not only reduce the number of sensors, but also reduce the detection error of the force detection assembly.

[0043] Specifically, the filter core of the air purifier is a cylindrical structure, the inside of the filter core is hollow, one end of the filter core is provided with a fan, a sensor assembly for measuring air pressure change blocks the other end of the filter core, the inside of the filter core is in communication with the outside of the filter core through the mesh of the filter core, external air is introduced into the inside of the filter core from the periphery of the filter core through the fan, when the filter screen does not reach the service life limit, the external air can normally enter the inner cavity, the air pressure in the inner cavity is balanced with the air pressure of the external air, the moving amount of the second connecting piece is small, that is, the deformation amount of the elastic body 300 is small, when the filter screen reaches the service life limit, the external air cannot normally enter the inner cavity, under the action of the fan, the inner cavity is in a negative pressure state, since the second connecting piece 420 is connected with the first connecting piece 410 through the flexible piece 430, the second connecting piece 420 can move relative to the first connecting piece 410, the second connecting piece 420 directly transmits the impact force to the elastic body 300, so that the elastic body 300 elastically deforms, the strain gauge can obtain the deformation amount of the elastic body 300, whether the filter screen reaches the service life limit can be judged by the size of the deformation amount of the elastic body 300, both the number of sensors and the detection error of the force detection assembly can be reduced.

[0044] With reference to Figure 2 In some embodiments of the present application, the middle position of the support piece 200 is provided with a through hole 210, the other end of the elastic body 300 extends to the inside of the through hole 210, so that the end of the elastic body 300 connected with the second connecting piece 420 is suspended relative to the support piece 200, which can increase the deformation amount of the elastic body 300 and is beneficial to the strain gauge detecting the deformation amount of the elastic body 300, thereby reducing the detection error.

[0045] Specifically, along the axial direction of the cylinder body 100, the through hole 210 penetrates the support piece 200, one end of the elastic body 300 is connected with the support piece 200, and the other end of the elastic body 300 protrudes from the hole wall of the through hole 210, so that the end of the elastic body 300 connected with the second connecting piece 420 is suspended relative to the support piece 200, which can increase the deformation amount of the elastic body 300 and is beneficial to the strain gauge detecting the deformation amount of the elastic body 300, thereby reducing the detection error.

[0046] With reference to Figure 4 In some embodiments of the present application, the other end of the elastic body 300 is connected with the middle position of the second connecting piece 420, so that the other end of the elastic body 300 is uniformly stressed, which can reduce the detection error of the force detection assembly.

[0047] With reference to Figure 4 , Figure 8 and Figure 9In some embodiments of the utility model, flexible piece 430 is equipped with annular groove 431, annular groove 431 is arranged around the axis of accommodation cavity 110, annular groove 431 is between first connecting piece 410 and second connecting piece 420, so that the width of annular groove 431 can increase or decrease, can increase the deformation of flexible piece 430, and the second connecting piece 420 is moved along the direction of approaching or moving away from the elastomer 300.

[0048] Specifically, annular groove 431 is annular structure, along the radial direction of second connecting piece 420, annular groove 431 is between first connecting piece 410 and second connecting piece 420, when second connecting piece 420 is moved along the direction of approaching elastomer 300, the width of annular groove 431 increases and the depth decreases, when second connecting piece 420 is moved along the direction of moving away from elastomer 300, the width of annular groove 431 decreases and the depth increases, and the second connecting piece 420 is moved along the direction of approaching or moving away from elastomer 300.

[0049] It should be noted that flexible piece 430 also has elasticity, and flexible piece 430 is made of rubber or silicone material, so that flexible piece 430 can automatically restore to the original state.

[0050] Referring to Figure 4 、 Figure 5 In some embodiments of the utility model, flexible piece 430 includes first annular part 432, second annular part 433 and deformation part 434 arranged between first annular part 432 and second annular part 433, first annular part 432 is connected with first connecting piece 410, second annular part 433 is connected with second connecting piece 420, annular groove 431 is arranged in deformation part 434, which can facilitate the assembly of flexible piece 430.

[0051] Specifically, on the cross section passing through the axis of first annular part 432, the contour line of deformation part 434 is U-shaped structure, the outer side of deformation part 434 is connected with the inner side of first annular part 432, the outer side of first annular part 432 is connected with first connecting piece 410, the inner side of deformation part 434 is connected with the outer side of second annular part 433, and the inner side of second annular part 433 is connected with the outer side of second connecting piece 420, which can facilitate the assembly of flexible piece 430.

[0052] It should be noted that first annular part 432, second annular part 433 and deformation part 434 are one-piece structure, which can reduce the number of molds to reduce the production cost of the mold, thereby reducing the production cost of cover assembly 400, which will not be described here.

[0053] Referring to Figure 4 、 Figure 6In some embodiments of the utility model, first connecting piece 410 and barrel 100 are detachably connected, first connecting piece 410 and barrel 100 enclose to form first installation groove, first annular part 432 is installed in first installation groove, and flexible piece 430 can be conveniently assembled.

[0054] Specifically, the end of the side wall of the accommodating cavity 110 is provided with a first groove 120, the periphery of the slot of the first groove 120 is provided with a first hook 130, the outer periphery of the first connecting piece 410 is provided with a second groove 411, the first groove 120 and the second groove 411 enclose to form a first installation groove, when the first connecting piece 410 is connected with the barrel 100, the first annular part 432 is accommodated in the first installation groove, and the side of the first connecting piece 410 away from the elastic body 300 abuts against the hook part of the first hook 130, so as to limit the first connecting piece 410 from exiting the first groove 120, which can facilitate the assembly of the flexible piece 430.

[0055] It should be noted that the first connecting piece 410 can also be detachably connected with the barrel 100 by means of bolting, which is not limited herein.

[0056] Referring to Figure 4 , Figure 5 and Figure 7 In some embodiments of the utility model, the cover assembly 400 further comprises a fixed plate 440, the fixed plate 440 is detachably connected with the second connecting piece 420, the second connecting piece 420 is provided with a second installation groove 421, the second annular part 433 is installed in the second installation groove 421, and the fixed plate 440 covers the second installation groove 421, which can limit the second annular part 433 from exiting the second installation groove 421, and facilitate the assembly of the second connecting piece 420 and the flexible piece 430.

[0057] Specifically, the second installation groove 421 is annular structure, the second connecting piece 420 is provided with a second hook 422, the hook part of the second hook 422 abuts against the side of the fixed plate 440 away from the second installation groove 421, so as to limit the second annular part 433 from exiting the second installation groove 421, which can facilitate the assembly of the second connecting piece 420 and the flexible piece 430.

[0058] Referring to Figures 2 to 4 In some embodiments of the utility model, further comprising a circuit board 500, the circuit board 500 is provided with a data processing module, the strain gauge is electrically connected with the data processing module, and the data processing module is used for converting the deformation data obtained by the strain gauge into service life data, so that whether the filter screen reaches the service life can be directly judged, thereby improving the use experience of the user.

[0059] Referring to Figures 2 to 4In some embodiments of the utility model, still include power module 600, power module 600 is used for the power supply for circuit board 500, power module 600 can be battery or external power supply, can guarantee that force detection assembly can work normally.

[0060] According to the air purifier of the second aspect of the utility model, the sensor assembly for measuring air pressure changes comprises the sensor assembly for measuring air pressure changes of the first aspect of the utility model, which can reduce the number of sensors and reduce the detection error of the force detection assembly.

[0061] Specifically, the filter element of the air purifier is in a cylindrical structure, the inside of the filter element is hollow, one end of the filter element is provided with a fan, the other end of the filter element is blocked by the sensor assembly for measuring air pressure changes, the inside of the filter element is in communication with the outside of the filter element through the mesh of the filter element, and the outside air is introduced into the inside of the filter element from the periphery of the filter element through the fan. When the filter screen does not reach the use limit, the outside air can normally enter the inner cavity, the air pressure in the inner cavity is balanced with the air pressure of the outside air, the moving amount of the second connecting piece is small, that is, the deformation amount of the elastic body 300 is small, when the filter screen reaches the use limit, the outside air cannot normally enter the inner cavity, and under the action of the fan, the inner cavity is in a negative pressure state. Since the second connecting piece 420 is connected with the first connecting piece 410 through the flexible piece 430, the second connecting piece 420 can move relative to the first connecting piece 410, the second connecting piece 420 directly transmits the impact force to the elastic body 300, so that the elastic body 300 elastically deforms, the strain gauge can obtain the deformation amount of the elastic body 300, and whether the filter screen reaches the use limit can be judged by the deformation amount of the elastic body 300. The number of sensors can be reduced, and the detection error of the force detection assembly can be reduced.

[0062] The technical features of the above-described embodiments can be combined in any manner. To make the description concise, all possible combinations of the technical features in the above-described embodiments are not described, but as long as the combinations of the technical features do not contradict each other, they should be considered within the scope of the present disclosure.

[0063] The above embodiments have been described in detail in combination with the drawings, but the utility model is not limited to the above embodiments, and various changes can be made within the knowledge of ordinary skilled persons in the technical field without departing from the true spirit of the utility model.

Claims

1. A sensor assembly for measuring changes in air pressure, characterized by The application relates to a force detection device, which comprises the following components: a cylinder (100) provided with a containing cavity (110) and an opening (111) communicating with the containing cavity (110); a support (200) arranged in the containing cavity (110) and connected with the cylinder (100); a force detection assembly arranged in the containing cavity (110), which comprises an elastic body (300) and a strain gauge arranged on the elastic body (300), one end of the elastic body (300) is connected with the support (200), and the strain gauge is used for detecting the deformation amount of the elastic body (300); a cover assembly (400) comprising a first connecting piece (410), a second connecting piece (420) and a flexible piece (430) arranged between the first connecting piece (410) and the second connecting piece (420), the first connecting piece (410) is connected at the opening (111), and the second connecting piece (420) is connected with the other end of the elastic body (300).

2. The sensor assembly for measuring changes in air pressure of claim 1, wherein, A through hole (210) is arranged at the middle position of the support (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 changes in air pressure of claim 1, wherein, The other end of the elastic body (300) is connected with the middle position of the second connecting piece (420).

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

5. The sensor assembly for measuring changes in air pressure of claim 4, wherein, The flexible piece (430) comprises a first annular part (432), a second annular part (433) and a deformation part (434) arranged between the first annular part (432) and the second annular part (433), the first annular part (432) is connected with the first connecting piece (410), the second annular part (433) is connected with the second connecting piece (420), and the annular groove (431) is arranged in the deformation part (434).

6. The sensor assembly for measuring changes in air pressure of claim 5, wherein, The first connecting piece (410) is detachably connected with the cylinder (100), the first connecting piece (410) and the cylinder (100) enclose a first mounting groove, and the first annular part (432) is mounted in the first mounting groove.

7. The sensor assembly for measuring changes in air pressure of claim 5, wherein, The cover assembly (400) further comprises a fixing plate (440), the fixing plate (440) is detachably connected with the second connecting piece (420), the second connecting piece (420) is provided with a second mounting groove (421), the second annular part (433) is mounted in the second mounting groove (421), and the fixing plate (440) covers the second mounting groove (421).

8. The sensor assembly for measuring changes in air pressure of claim 1, wherein, The application further comprises a circuit board (500) provided with a data processing module, the strain gauge is electrically connected with the data processing module, and the data processing module is used for converting deformation data obtained by the strain gauge into service life data.

9. A sensor assembly for measuring changes in air pressure according to claim 8, wherein, The application further comprises a power supply module (600) used for supplying power for the circuit board (500).

10. An air cleaner characterized by comprising: A sensor assembly for measuring changes in gas pressure as claimed in any one of claims 1 to 9.

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