Housing assembly for pressure sensor, pressure sensor and packaging method

Abstract

The present invention provides a shell assembly for a pressure sensor, a pressure sensor and a packaging method, wherein the shell assembly for the pressure sensor comprises a shell body, a partition, and a plurality of air intake structures, wherein the shell body has a accommodating cavity penetrating along a first direction, the partition is arranged in the accommodating cavity and divides the accommodating cavity into a front cavity and a rear cavity along the first direction, and the plurality of air intake structures, each of which comprises a pressure interface installed on the bottom wall of the shell body, a connecting hole penetrating the partition, a frame arranged on the partition and surrounding the connecting hole, and a stop structure arranged on the partition, the frame is located in the rear cavity and has an inlet connected to the pressure interface, and the stop structure is arranged in the frame and between the connecting hole and the inlet, and is used to limit the detection medium flowing in from the inlet from directly impacting the connecting hole.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of pressure sensors, and in particular to a housing assembly for a pressure sensor, a pressure sensor, and a packaging method. Background Art

[0002] A pressure sensor is a device or apparatus that can sense pressure signals and convert them into usable output electrical signals according to certain rules. The detection medium of a pressure sensor is usually the detection medium. When the detection medium enters the pressure sensor and directly impacts the pressure chip, the instantaneous impact pressure is too large and can easily damage the pressure chip and other internal devices. Summary of the invention

[0003] The purpose of the embodiments of the present invention is to provide a shell assembly, a pressure sensor and a packaging method for a pressure sensor, aiming to solve the problem that when the detection medium enters the pressure sensor and directly impacts the pressure chip, the instantaneous impact pressure is too large and easily damages the internal components of the pressure sensor.

[0004] In order to solve the above technical problems, an embodiment of the present invention provides a housing assembly for a pressure sensor, comprising:

[0005] The housing body has a receiving cavity penetrating along a first direction;

[0006] A partition, disposed in the accommodating cavity, and dividing the accommodating cavity into a front cavity and a rear cavity along a first direction;

[0007] A plurality of air intake structures, each of which includes a pressure interface installed on the bottom wall of the shell body, a connecting hole penetrating the partition, a frame arranged on the partition and surrounding the connecting hole, and a stop structure arranged on the partition, the frame is located in the rear cavity and has an inlet connected to the pressure interface, and the stop structure is blocked in the frame and located between the connecting hole and the inlet, and is used to limit the detection medium flowing in from the inlet from directly impacting the connecting hole.

[0008] The present invention provides a stop structure, which is arranged in the frame and between the connecting hole and the inlet. On the one hand, it can block the medium flow that directly impacts the connecting hole to avoid damaging the internal components of the pressure sensor (such as the pressure chip); on the other hand, it can divert the medium flow formed by the detection medium to reduce the impact force, thereby protecting the internal components.

[0009] Preferably, in the housing assembly for the pressure sensor, the stop structure includes a first stop plate, which is arranged on the partition and located in the frame, and the first stop plate is arranged between the connecting hole and the inlet to separate the channel of the detection medium from the inlet to the connecting hole into a first channel and a second channel.

[0010] Preferably, in the shell assembly for the pressure sensor, the first stop plate includes a first section extending along the second direction, and a second section extending from the second end of the first section along the third direction away from the connecting hole, and the first end of the first section is spaced apart from the bottom wall of the frame to form the second channel.

[0011] Preferably, in the housing assembly for the pressure sensor, the first section and the second section are provided with rounded corners at the connection.

[0012] Preferably, in the shell assembly for the pressure sensor, the stop structure also includes a second stop plate, the second stop plate is arranged on the partition and is located between the inlet and the first stop plate, the second stop plate and the first stop plate are respectively spaced apart along the second direction and the third direction to form the first channel together with the first stop plate.

[0013] Preferably, in the housing assembly for the pressure sensor, the second stop plate extends from the side wall of the surrounding frame, and a portion where the second stop plate is connected to the side wall of the surrounding frame is rounded.

[0014] Preferably, in the shell assembly for the pressure sensor, the surrounding frame includes a lower frame arranged opposite to the pressure interface along the second direction, the lower frame has the inlet, and the inner surface of the lower frame is inclined along the second direction and the third direction to form a guide structure.

[0015] Preferably, in the housing assembly for the pressure sensor, the number of the air intake structures is two, and the two air intake structures are arranged at intervals along the second direction or the third direction.

[0016] In order to achieve the above object, the present invention further provides a pressure sensor, comprising the above housing assembly for the pressure sensor.

[0017] Preferably, in the pressure sensor, the number of the air intake structures is two, including a first air intake structure and a second air intake structure arranged at intervals, and the communicating hole of the second air intake structure is communicated with the front cavity;

[0018] The pressure sensor also includes:

[0019] A circuit board is mounted on the partition and located in the front cavity, the circuit board is provided with a pressure hole, and the pressure hole is arranged opposite to the communication hole of the first air intake structure in the second direction;

[0020] A pressure chip, the back side of which is mounted on the circuit board and covers the pressure hole.

[0021] Preferably, in the pressure sensor, the pressure sensor further comprises an upper cover and a first sealing member, the upper cover having a first surface facing the pressure chip, a convex rib extending from the first surface along a first direction, the convex rib being sealed and connected to the partition and / or the circuit board to separate the front cavity into a first cavity and a second cavity along a third direction, the upper cover having a vent hole extending therethrough, the vent hole being connected to the second cavity, and the vent hole being sealed with the first sealing member;

[0022] The pressure chip is located in the first cavity, and the communicating hole of the second air intake structure is communicated with the first cavity.

[0023] Preferably, in the pressure sensor, the pressure sensor also includes a second seal, which covers the pressure chip and is sealed to the partition or the circuit board, the connecting hole of the second air intake structure is connected to the inner cavity of the second seal, and the second seal is sealed in the first cavity.

[0024] In order to achieve the above object, the present invention further provides a packaging method of the pressure sensor as described above, and the packaging method of the pressure sensor comprises the following steps:

[0025] Bonding the pressure chip to the circuit board, and covering the pressure chip with a second sealing member and bonding the second sealing member to the circuit board to form a pressure core body;

[0026] bonding the pressure core to the partition;

[0027] The upper cover is bonded to the partition plate, and the convex rib is bonded to the partition plate and / or the circuit board to form a sealed first cavity and a sealed second cavity.

[0028] Preferably, in the pressure sensor,

[0029] When the first sealing member is a steel ball, after the step of bonding the upper cover to the shell body and bonding the convex rib to the partition and / or the circuit board, the method further includes:

[0030] Pressing the first seal into the vent hole; or,

[0031] The first sealing member is a waterproof and breathable membrane. Before the step of bonding the upper cover to the housing body and bonding the convex rib to the partition and / or the circuit board, the method further includes:

[0032] The waterproof breathable membrane is bonded to the outer edge of the vent hole located on the first surface to make the vent hole waterproof and breathable. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0034] Figure 1 A three-dimensional diagram of an embodiment of a pressure sensor is provided for this embodiment;

[0035] Figure 2 for Figure 1 An exploded schematic diagram of the pressure sensor in the first embodiment;

[0036] Figure 3 for Figure 1 An exploded schematic diagram of the pressure sensor in the second embodiment;

[0037] Figure 4 for Figure 1 An exploded schematic diagram of the pressure sensor in the third embodiment;

[0038] Figure 5 for Figure 4 A partial schematic diagram of the structure in the middle;

[0039] Figure 6 for Figure 1 A perspective view of an embodiment of a housing assembly for a pressure sensor;

[0040] Figure 7 for Figure 6 The enlarged schematic diagram of the X in the middle;

[0041] Figure 8 for Figure 6 A partial schematic diagram of the middle shell assembly from another viewing angle.

[0042] Description of the accompanying drawings of the present invention:

[0043] Label name Label name 100 Housing assemblies for pressure sensors 342a, 342b Second stop plate 1 Shell body 343a, 343b The third stop plate 11 Front cavity 351a, 351b First Channel 12 Back cavity 352a, 352b Second channel 2 Partition 200 Circuit Board 3 Air intake structure 210 Pressure hole 3a First air intake structure 300 Pressure chip 3b Second air intake structure 400 Lower cover 31a, 31b Pressure port 500 Upper cover 32a, 32b Connecting hole 510 First side 33a, 33b Frame 520 ribs 331a, 331b Bottom border 531 First cavity 3311a, 3311b import 532 Second cavity 3312a, 3312b Diversion structure 541 Ventilation holes 34a, 34b Stop structure 610 First seal 341a, 341b First stop plate 611 Waterproof breathable membrane 3411a, 3411b Paragraph 1 612 Steel Ball 3412a, 3412b Paragraph 2 620 Second seal

[0044] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0047] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0048] The present invention provides a housing assembly for a pressure sensor. Figure 1 shows a perspective view of an embodiment of a pressure sensor, Figures 6 to 8 Shows Figure 1 For a schematic diagram of an embodiment of a housing assembly for a pressure sensor, see Figures 6 to 8The housing assembly 100 for the pressure sensor includes a housing body 1, a partition 2, and a plurality of air intake structures 3. The housing body 1 has an accommodating cavity that is arranged along a first direction (in this embodiment, the first direction is the front-to-back direction). The partition 2 is arranged in the accommodating cavity and divides the accommodating cavity into a front cavity 11 and a rear cavity 12 along the first direction. The plurality of air intake structures 3 each include a pressure interface 31a, 31b installed on the bottom wall of the housing body 1, a communicating hole 32a, 32b that is arranged on the partition 2, and a pressure interface 31a, 31b that is arranged on the bottom wall of the housing body 1 and surrounds the communicating hole 32a. , 32b, and a stop structure 34a, 34b provided on the partition 2, the surrounding frames 33a, 33b are located in the rear cavity 12 and have inlets 3311a, 3311b connected to the pressure interfaces 31a, 31b, the stop structures 34a, 34b are blocked in the surrounding frames 33a, 33b and located between the connecting holes 32a, 32b and the inlets 3311a, 3311b, and are used for limiting the detection medium flowing in from the inlets 3311a, 3311b from directly impacting the connecting holes 32a, 32b.

[0049] When the housing assembly 100 for the pressure sensor provided by the present invention has only one air intake structure 3 (not shown in the figure), the pressure sensor can be a pressure sensor that senses pressure from the back and measures absolute pressure; see Figures 6 to 8 When there are two air intake structures 3, the pressure sensor may be a differential pressure sensor for measuring differential pressure, and no specific limitation is made here.

[0050] In this embodiment, the shell body 1, the partition plate 2, and the plurality of air intake structures 3 are integrally arranged, or may be separately arranged, which is not specifically limited here.

[0051] The present invention provides a stop structure 34a, 34b, which is arranged in the frame 33a, 33b and between the connecting holes 32a, 32b and the inlet 3311a, 3311b. On the one hand, the stop structure 34a, 34b can block the medium flow that directly impacts the connecting holes 32a, 32b to avoid damaging the internal components of the pressure sensor (such as the pressure chip 300); on the other hand, the medium flow formed by the detection medium (usually the detection medium is gas, and the medium flow is gas flow) can be diverted to reduce the instantaneous impact force, thereby protecting the internal components.

[0052] Specifically, the stop structure 34a, 34b includes a first stop plate 341a, 341b, which is disposed on the partition plate 2 and located in the surrounding frame 33a, 33b, and the first stop plate 341a, 341b is disposed between the connecting holes 32a, 32b and the inlet 3311a, 3311b to separate the passage of the detection medium from the inlet 3311a, 3311b to the connecting holes 32a, 32b into a first passage 351a, 351b and a second passage 352a, 352b. Figure 6 , Figure 6 The middle arrow shows the flow direction of the medium flow. The medium flow can enter from two channels. The instantaneous large pressure medium flow does not face the connecting holes 32a and 32b to avoid impacting the internal components of the pressure sensor. Taking the pressure chip 300 as an example, it avoids directly impacting the pressure chip 300, damaging the pressure chip 300, and even causing temperature drift.

[0053] In this embodiment, the first stop plates 341a, 341b include first sections 3411a, 3411b extending along a second direction (in this embodiment, the second direction is the up and down direction), and second sections 3412a, 3412b extending from the second ends of the first sections 3411a, 3411b along a third direction (in this embodiment, the third direction is the left and right direction) away from the connecting holes 32a, 32b. The first ends of the first sections 3411a, 3411b are spaced apart from the bottom walls of the surrounding frames 33a, 33b to form the second channels 352a, 352b. In this way, if water or the like enters the cavity, most of the water will be discharged along the second channels 352a, 352b.

[0054] In order to make the detection medium flow more smoothly in the channel, the first sections 3411a, 3411b and the second sections 3412a, 3412b are rounded at the connection.

[0055] For further information, see Figure 6 The stop structures 34a, 34b also include second stop plates 342a, 342b, which are arranged on the partition 2 and between the inlets 3311a, 3311b and the first stop plates 341a, 341b. The second stop plates 342a, 342b are spaced apart from the first stop plates 341a, 341b along the second direction and the third direction, respectively, so as to be jointly formed with the first stop plates 341a, 341b to form the first channels 351a, 351b. By setting the second stop plates 342a, 342b, on the one hand, the flow path of the medium flow can be increased, and on the other hand, a small channel can be formed, which can further reduce the instantaneous impact force of the medium flow.

[0056] Specifically, the second stopper plates 342a, 342b extend from the side walls of the enclosure 33a, 33b, and are chamfered at the connection with the side walls of the enclosure 33a, 33b. In this embodiment, the second stopper plates 342a, 342b and the side walls of the enclosure 33a, 33b may be integrated.

[0057] In order to further prevent the medium flow from directly impacting the connecting holes 32a, 32b, the stop structure 34a, 34b also includes a third stop plate 343a, 343b, which is arranged on the partition 2 and blocks the second channels 352a, 352b, and is spaced apart from the side walls of the frames 33a, 33b and the first sections 3411a, 3411b of the first stop plates 341a, 341b along the third direction, respectively, to divide the medium flow flowing through the second channels 352a, 352b into two flows, thereby further reducing the impact; on the other hand, by setting the third stop plates 343a, 343b. The third stop plates 343a and 343b are extended along the third direction, and have receiving surfaces facing the connecting holes 32a and 32b. The heights of the receiving surfaces along the second direction from the middle to both ends are gradually lowered, so as to facilitate drainage and prevent water from accumulating and freezing on the receiving surfaces.

[0058] In this embodiment, the surrounding frames 33a, 33b include lower frames 331a, 331b arranged opposite to the pressure interfaces 31a, 31b along the second direction, the lower frames 331a, 331b have the inlets 3311a, 3311b, and the inner surfaces of the lower frames 331a, 331b are inclined along the second direction and the third direction (in this embodiment, they can be inclined rightward and upward) to form guide structures 3312a, 3312b, so that the water vapor generated by the detection medium can be condensed into liquid and guided into the inlets 3311a, 3311b through the guide structures 3312a, 3312b, and then enter the pressure interfaces 31a, 31b and flow out, so that the liquid condensed by the water vapor can be prevented from accumulating and freezing in the pressure sensor.

[0059] Specifically, the inner surface of the lower frame 331a, 331b has an inclination angle A relative to the third direction. If A is too large, it will affect the overall size. In this embodiment, 0<A≤15°. Preferably, 10°≤A≤15°. Preferably, 10°≤A≤15°. Preferably, A is 12°.

[0060] Specifically, in this embodiment, the number of the air intake structures 3 is two, and the two air intake structures 3 are arranged at intervals along the second direction or the third direction. Of the two air intake structures 3, one (the first air intake structure 3a) can be connected to the back of the pressure chip 300, so that the back of the pressure chip 300 senses pressure, and the other (the second air intake structure 3b) can enter the front of the pressure chip 300, so that the front of the pressure chip 300 senses pressure, so that it can be used as a differential pressure sensor.

[0061] The present invention also provides a pressure sensor. Figures 1 to 4 A schematic diagram showing an embodiment of a pressure sensor is shown in Figures 1 to 4 , the pressure sensor includes the above-mentioned housing assembly 100 for a pressure sensor. The pressure sensor includes all embodiments of the above-mentioned housing assembly 100 for a pressure sensor. When the pressure sensor is installed, the pressure interfaces 31a and 31b are arranged downward, the medium flow enters from the pressure interfaces 31a and 31b, passes through the inlets 3311a and 3311b, enters the cavity formed by the surrounding frames 33a and 33b, and is diverted by the first stop plates 341a and 341b. The instantaneous impact force formed by the medium flow is reduced for the first time, and most of the medium flow enters the first channels 351a and 351b. In the first channels 351a and 351b, the medium flow passes through the second stop plates 342a and 342b and the first stop plates 341a and 341b, and the instantaneous impact force of the medium flow is reduced for the second time;

[0062] For further information, see Figures 2 to 4 The number of the air intake structures 3 is two, including a first air intake structure 3a and a second air intake structure 3b arranged at intervals, and the communication hole 32b of the second air intake structure 3b is connected to the front cavity 11; the pressure sensor also includes a circuit board 200 and a pressure chip 300, the circuit board 200 is mounted on the partition 2 and located in the front cavity 11, the circuit board 200 is provided with a pressure hole 210, and the pressure hole 210 is arranged opposite to the communication hole 32a of the first air intake structure 3a in the second direction, and the back of the pressure chip 300 is mounted on the circuit board 200 and covers the pressure hole 210. In this way, the pressure sensor can be used to measure the pressure difference.

[0063] Since pressure sensors for measuring pressure difference are usually used in automobiles and other fields, and the measuring environment is relatively humid, in order to prevent water from penetrating into the protective pressure chip 300 and causing damage to the pressure chip 300, it is usually necessary to ensure that the cavity where the pressure chip 300 is located is sealed. The present invention may adopt the first embodiment, please refer to Figure 3 , Figure 3 The embodiment of the pressure sensor upper cover 500 using ribs 520 is shown. Figure 3The diagram in the figure may be a schematic diagram after the top of the second seal 620 is cut off for the convenience of observation (i.e., a schematic diagram after the top of the second seal 620 is cut off in the second embodiment), or a schematic diagram of a pressure sensor provided with an open structure instead of the second seal 620 (i.e., a schematic diagram of the first embodiment). The pressure sensor further comprises an upper cover 500 and a first seal 610, wherein the upper cover 500 has a first surface 510 facing the pressure chip 300, and a convex rib 520 is formed extending from the first surface 510 along a first direction, wherein the convex rib 520 is sealedly connected to the partition 2 and / or the circuit board 200 to separate the front cavity 11 into a first cavity 531 and a second cavity 532 along a third direction, wherein the upper cover 500 is provided with a vent hole 541, wherein the vent hole 541 is connected to the second cavity 532, and wherein the vent hole 541 is sealedly provided with the first seal 610; the pressure chip 300 is located in the first cavity 531, and the connecting hole 32b of the second air intake structure 3b is connected to the first cavity 531. In this embodiment, a sealed first cavity 531 is formed by the convex rib 520 and the partition 2 and / or the circuit board 200, so that the detection medium enters the back of the pressure chip 300 through the connecting hole 32a of the first air intake structure 3a, and the detection medium reaches the first cavity 531 through the connecting hole 32b of the second air intake structure 3b, so that the front of the pressure chip 300 is pressure-sensitive. In this way, the pressure difference between the detection medium entering the first air intake structure 3a and the second air intake structure 3b can be measured. In this embodiment, the first sealing member 610 is a steel ball 612;

[0064] Alternatively, the second implementation may be adopted, see Figure 2 and Figure 3The second embodiment is an optimization based on the first embodiment. In the first embodiment, the front cavity 11 is defined as a sealed first cavity 531 by the convex rib 520 of the upper cover 500 to prevent water vapor in the detection environment from entering the pressure chip 300, thereby damaging the pressure chip 300. The difference between the second embodiment and the first embodiment is that the pressure sensor further includes a second seal 620, the second seal 620 covers the pressure chip 300 and is sealed and connected to the partition 2 or the circuit board 200, the connecting hole 32b of the second air intake structure 3b is connected to the inner cavity of the second seal 620, and the second seal 620 is sealed in the first cavity 531. In this embodiment, the second seal 620 is a sealing cover. The sealing cover can be bonded to the circuit board 200 to form a small cavity seal, which effectively prevents the failure of the sealing connection between the convex rib 520 and the partition 2 and / or the circuit board 200. The small cavity seal uses less sealant, and the risk of sealing failure is significantly reduced. Furthermore, in the second embodiment, on the one hand, a small cavity seal is used, and on the other hand, a sealed first cavity 531 is formed by sealing through the rib 520 and the like, and the sealing cover is located in the first cavity 531. In this way, a double seal is formed, thereby reducing the probability of the traditional pressure sensor being scrapped due to sealing failure.

[0065] A third implementation method may also be adopted, see Figure 4 and Figure 5 The difference between the third embodiment and the second embodiment is that the convex rib 520 is not provided on the upper cover 500, that is, the sealing is only performed by the small cavity formed by the second sealing member 630, and the first sealing member 610 is a waterproof breathable membrane 611.

[0066] The pressure sensor also includes a lower cover 400 and the like, which will not be introduced one by one here.

[0067] The present invention also provides a packaging method for the pressure sensor, the packaging method for the pressure sensor comprising the following steps:

[0068] Step S710: bonding the pressure chip 300 to the circuit board 200, and covering the pressure chip 300 with a second sealing member 620 and bonding the second sealing member 620 to the circuit board 200 to form a pressure core;

[0069] Step S720: bonding the pressure core to the partition 2;

[0070] Step S730 : bonding the upper cover 500 to the partition 2 , and bonding the convex rib 520 to the partition 2 and / or the circuit board 200 , so as to form a sealed first cavity 531 and a sealed second cavity 532 .

[0071] In specific implementation, adhesive is applied on the partition 2 at positions corresponding to the edge of the upper cover 500 and the convex rib 520, and then the upper cover 500 is pressed in for bonding.

[0072] When the first sealing member 610 is a steel ball 612, after the step of bonding the upper cover 500 to the housing body 1 and bonding the rib 520 to the partition 2 and / or the circuit board 200, the method further includes:

[0073] Step S740: Press the first sealing member 610 into the vent hole 541;

[0074] Since the second cavity 532 forms a closed cavity after the upper cover 500 is covered, air is released by setting the vent hole 541. After the upper cover 500 is installed, the vent hole 541 is sealed by the first sealing member 610 to prevent water vapor from entering the interior of the pressure sensor.

[0075] The first sealing member 610 is a waterproof breathable membrane 611. Before the step of bonding the upper cover 500 to the housing body 1 and bonding the rib 520 to the partition 2 and / or the circuit board 200, the method further includes:

[0076] Step S750: bonding the waterproof breathable membrane 611 to the outer edge of the vent hole 541 located on the first surface 510 to make the vent hole 541 waterproof and breathable.

[0077] In specific implementation, since the waterproof breathable film 611 needs to be bonded to the first surface 510 to cover the vent hole 541, exhaust can be performed during installation. Usually, after the upper cover 500 is installed, a label will be bonded to the side of the upper cover 500 opposite to the first surface 510, and the label covers the vent hole 541. In this way, the waterproof effect of the waterproof breathable film 611 can be avoided to a certain extent, and the waterproof effect can be enhanced. In other embodiments, other stickers can also be bonded to the side of the upper cover 500 opposite to the first surface 510, and no specific limitation is made here.

[0078] It should be noted that the embodiment of the packaging method of the pressure sensor provided by the present invention is an embodiment of the packaging method corresponding to the above-mentioned pressure sensor assembly, so the packaging method of the pressure sensor provided by the present invention can be implemented in conjunction with the embodiment of the pressure sensor. The relevant technical details mentioned in the embodiment of the packaging method of the pressure sensor are still valid in the structure of the pressure sensor, and the technical effects that can be achieved in the embodiment of the packaging method of the pressure sensor can also be achieved in the embodiment of the pressure sensor provided by the present invention. In order to reduce repetition, they will not be repeated. Accordingly, the relevant technical details mentioned in the embodiment of the pressure sensor provided by the present invention can also be applied in the embodiment of the packaging method of the pressure sensor.

[0079] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A housing assembly for a pressure sensor, characterized in that: include: The housing body has a receiving cavity penetrating along a first direction; A partition, disposed in the accommodating cavity, and dividing the accommodating cavity into a front cavity and a rear cavity along a first direction; A plurality of air intake structures, each of which comprises a pressure interface mounted on the bottom wall of the housing body, a communication hole penetrating the partition, a frame disposed on the partition and surrounding the communication hole, and a stopper structure disposed on the partition, the frame being located in the rear cavity and having an inlet communicating with the pressure interface, the stopper structure being disposed in the frame and between the communication hole and the inlet, and being used to limit the detection medium flowing in from the inlet from directly impacting the communication hole; Wherein, the stop structure comprises a first stop plate, which is arranged on the partition and located in the enclosure, and the first stop plate is arranged between the connecting hole and the inlet to separate the channel of the detection medium from the inlet to the connecting hole into a first channel and a second channel; the stop structure also comprises a second stop plate, which is arranged on the partition and located between the inlet and the first stop plate, and the second stop plate and the first stop plate are respectively arranged at intervals along the second direction and the third direction to enclose the first channel together with the first stop plate; the stop structure also comprises a third stop plate, which is arranged on the partition and blocks the second channel; The first direction, the second direction and the third direction are arranged orthogonally in pairs.

2. The housing assembly for a pressure sensor according to claim 1, characterized in that: The first stop plate includes a first section extending along the second direction, and a second section extending from the second end of the first section along the third direction away from the connecting hole. The first end of the first section is spaced apart from the bottom wall of the surrounding frame to form the second channel.

3. The housing assembly for a pressure sensor according to claim 2, characterized in that: The first section and the second section are provided with rounded corners at the connection.

4. The housing assembly for a pressure sensor according to claim 1, characterized in that: The second stop plate extends from the side wall of the surrounding frame, and is chamfered at a connection with the side wall of the surrounding frame.

5. The housing assembly for a pressure sensor according to claim 1, characterized in that: The third stop plate and the side wall of the surrounding frame and the first section of the first stop plate are respectively arranged at intervals along the third direction to divide the medium flow flowing through the second channel into two flows.

6. The housing assembly for a pressure sensor according to claim 1, characterized in that: The surrounding frame includes a lower frame arranged opposite to the pressure interface along the second direction, the lower frame has the inlet, and the inner surface of the lower frame is inclined along the second direction and the third direction to form a guide structure.

7. A pressure sensor, characterized in that: A housing assembly for a pressure sensor comprising any one of claims 1 to 6.

8. A method for packaging a pressure sensor as claimed in claim 7, characterized in that: The steps include: Bonding the pressure chip to the circuit board, and covering the pressure chip with a second sealing member and bonding the second sealing member to the circuit board to form a pressure core body; bonding the pressure core to the partition; The upper cover is bonded to the partition plate, and the convex rib is bonded to the partition plate and / or the circuit board to form a sealed first cavity and a sealed second cavity.

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