CN113266964A - Valve assembly and sensor - Google Patents
Valve assembly and sensor Download PDFInfo
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- CN113266964A CN113266964A CN202110481252.0A CN202110481252A CN113266964A CN 113266964 A CN113266964 A CN 113266964A CN 202110481252 A CN202110481252 A CN 202110481252A CN 113266964 A CN113266964 A CN 113266964A
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- sensor
- filter screen
- filter
- sensing module
- shell
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- 238000009434 installation Methods 0.000 claims abstract description 6
- 238000001914 filtration Methods 0.000 claims description 16
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- 239000012530 fluid Substances 0.000 abstract description 31
- 239000012535 impurity Substances 0.000 abstract description 15
- 230000000694 effects Effects 0.000 abstract description 8
- 239000003507 refrigerant Substances 0.000 description 11
- 239000000463 material Substances 0.000 description 7
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- XUIMIQQOPSSXEZ-UHFFFAOYSA-N silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 238000004378 air conditioning Methods 0.000 description 2
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- 239000000853 adhesive Substances 0.000 description 1
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Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
- F25B43/003—Filters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K13/00—Thermometers specially adapted for specific purposes
- G01K13/02—Thermometers specially adapted for specific purposes for measuring temperature of moving fluids or granular materials capable of flow
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L11/00—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K2201/00—Application of thermometers in air-conditioning systems
Abstract
The present application provides a valve assembly and a sensor, the valve assembly comprising a valve body and a sensor; the valve body is provided with an installation cavity, and at least part of the sensor is accommodated in the installation cavity; the sensor comprises a shell and a detection unit; the sensor has a first flow channel; the detection unit comprises a plate component and a sensing module; the valve body is also provided with a second flow passage; the valve assembly further comprises a filter member; the filter component comprises a filter screen part and a fixing part, wherein the filter screen part is fixedly connected with the fixing part or the filter screen part and the fixing part are of an integral structure; the first flow channel and the second flow channel are respectively positioned on different sides of the filter screen part along the height direction of the sensor; the fixing part is fixedly connected or in limited connection with at least one of the valve body, the shell and the plate part; the filter screen part is provided with a plurality of meshes, the meshes are communicated with the first flow passage, and the meshes are communicated with the second flow passage. The application provides a valve module and sensor are better to fluid impurity's filter effect.
Description
Technical Field
The application relates to the technical field of signal detection devices, in particular to a valve assembly and a sensor.
Background
A valve assembly in the related art includes a valve body having a flow passage through which refrigerant can flow, and a sensor capable of detecting an important parameter such as a pressure signal or a temperature signal of the refrigerant in the flow passage.
In air conditioning systems, however, there are inevitable impurities that may flow with the refrigerant in the system or stay in a component. If these impurities enter the sensor, they may affect the detection accuracy, response time, and even service life of the sensor, and therefore, the related art needs to be improved.
Disclosure of Invention
The application aims to provide a valve component and a sensor which have good filtering effects on fluid impurities.
In one aspect, the present application provides a valve assembly comprising a valve body and a sensor; the valve body is provided with an installation cavity, and at least part of the sensor is accommodated in the installation cavity;
the sensor comprises a shell and a detection unit; the sensor has a first flow channel; the detection unit comprises a plate component and a sensing module; the sensing module is connected with the plate component; the valve body is also provided with a second flow passage; the first flow channel is located at least partially between the second flow channel and the plate member in a height direction along the sensor;
the valve assembly further comprises a filter member; the filter component comprises a filter screen part and a fixing part, wherein the filter screen part is fixedly connected with the fixing part or the filter screen part and the fixing part are of an integral structure; the first flow channel and the second flow channel are respectively positioned on different sides of the filter screen part along the height direction of the sensor; the fixing part is fixedly connected or in limited connection with at least one of the valve body, the shell and the plate part; the filter screen section is provided with a plurality of meshes, the meshes are communicated with the first flow channel, and the meshes are communicated with the second flow channel.
Compared with the related art, the arrangement of the filtering part in the valve component is beneficial to the situation that impurities in the fluid are not easy to enter the first flow channel of the sensor, and correspondingly, the valve component can achieve a good fluid impurity filtering effect.
In another aspect, the present application further provides a sensor including a housing, a detection unit, and a filter member; the sensor has a first flow channel, the detection unit includes a plate member and a sensing module; the sensing module is connected with the plate component;
the filter component comprises a filter screen part and a fixing part, wherein the filter screen part is fixedly connected with the fixing part or the filter screen part and the fixing part are of an integral structure; the first flow channel is at least partially located between the screen section and the detection unit in a height direction along the sensor;
the fixing part is fixedly connected or in limited connection with at least one of the plate part and the shell; the filter screen part protrudes relative to the fixing part in the direction far away from the inner cavity; the filter screen part is provided with a plurality of meshes which are communicated with the first flow passage.
Compared with the related art, the arrangement of the filtering part in the sensor is beneficial to the fact that impurities in fluid are not easy to enter the first flow channel of the sensor, and correspondingly, the sensor can achieve a good fluid impurity filtering effect.
Drawings
FIG. 1 is a perspective view of a valve assembly of the present application;
FIG. 2 is a cross-sectional structural schematic view of the valve assembly shown in FIG. 1;
FIG. 3 is a schematic view of another angular cross-section of the valve assembly shown in FIG. 1;
FIG. 4 is an exploded view of a portion of the valve assembly shown in FIG. 1;
FIG. 5 is a schematic perspective view of a sensor of the present application;
FIG. 6 is a schematic perspective view of the sensor shown in FIG. 5 at another angle;
FIG. 7 is an exploded view of the sensor shown in FIG. 5;
FIG. 8 is another exploded perspective view of the construction of the sensor shown in FIG. 5;
FIG. 9 is a schematic perspective cross-sectional view of the sensor of FIG. 5;
FIG. 10 is a schematic cross-sectional view of a portion of the assembly of the sensor shown in FIG. 9;
FIG. 11 is an enlarged view of a portion of the structure of the sensor shown in FIG. 10;
FIG. 12 is an enlarged schematic view of a portion of another sensor of the present application;
FIG. 13 is an enlarged schematic view of a portion of a further sensor of the present application;
FIG. 14 is a schematic perspective view of a portion of the assembly of the sensor shown in FIG. 10;
FIG. 15 is a schematic view of another angular perspective of a portion of the assembly of the sensor shown in FIG. 10;
FIG. 16 is a schematic view of an assembled structure of a detection unit and a filter member according to an embodiment of the present application;
FIG. 17 is an exploded schematic view of the sensor shown in FIG. 16;
FIG. 18 is a schematic cross-sectional view of another sensor of the present application;
FIG. 19 is a schematic view, partially in cross-section, of another valve assembly of the present application.
Detailed Description
In the fields of automobile air conditioners, household air conditioners, commercial air conditioners and the like, refrigerants are important heat exchange fluids in such heat management systems, and the pressure change and/or the temperature change of the refrigerants generally need to be monitored through sensors. The refrigerant may also contain particulate impurities, which may be from debris left by processing various components of the air conditioning system, or from substances peeled off from the surfaces of the components by the high-temperature and high-pressure fluid during long-term use, or from the fluid itself, and so on. The presence of these impurities can have a significant effect on the operation of the system components, and for valve assemblies, if impurities in the fluid enter the interior of the sensor, they can potentially affect the accuracy, response time, measurement range, and even the useful life of the sensor. Therefore, the sensors of the valve assembly place high demands on the cleanliness of the fluid they sense.
Referring to fig. 1-19, the present application provides a valve assembly 8 including a valve body 80 and a sensor 100. The valve body 80 is provided with a mounting cavity 801, and the sensor 100 is at least partially accommodated in the mounting cavity 801.
The sensor 100 includes a housing 1 and a detection unit 2. The sensor 100 has an internal cavity 200 and a first flow channel 400. The inner chamber 200 and the first flow channel 400 do not communicate. The detection unit 2 includes a plate member 21 and a sensing module 23. The sensing module 23 is connected with the plate member 21. At least parts of the cavity 200 and the first flow channel 400 are respectively located on different sides of the plate member 21 in the height direction H of the sensor 100. Please refer to fig. 1 to 3, and fig. 5 with a double arrow in the schematic direction (i.e. the up-down direction in fig. 5).
The valve body 80 is also provided with a second flow passage 800, and the first flow passage 400 is closer to the plate member 21 than the second flow passage 800. In the schematic manner of fig. 1 to 4, the first flow passage 400 and the second flow passage 800 axially intersect and are disposed substantially perpendicularly. The valve body 80 is further provided with a third flow passage 802, and the third flow passage 802 and the second flow passage 800 may be arranged in parallel in the axial direction.
The valve assembly 8 further includes a filtering component 3, the filtering component 3 includes a filtering net portion 31 and a fixing portion, the fixing portion may be a component of an integrated structure, or the fixing portion includes a plurality of components fixedly connected or connected in a limiting manner, the filtering net portion 31 and the fixing portion are fixedly connected or integrated, and the first flow channel 400 and the second flow channel 800 are respectively located on different sides of the filtering net portion 31 along the height direction H of the sensor 100. The fixing portion is fixedly connected or connected in a limited manner to at least one of the valve body 80, the housing 1, and the plate member 21. In the manner illustrated with reference to fig. 2 and 3, the fixed part of the filtering element 3 (in particular the bracket 32 and the sleeve 33) is fixedly connected to the plate element 21. In the manner illustrated with reference to fig. 18, the fixing portion of the filter element 3, in particular the bracket 32, is fixedly and/or captively connected to the housing 1. In the manner illustrated with reference to fig. 19, the fixed part of the filter element 3, in particular the bracket 32, is fixedly and/or captively connected to the valve body 80.
The mesh unit 31 is provided with a plurality of meshes 311, the meshes 311 communicate with the first flow channel 400, and the meshes 311 communicate with the second flow channel 800.
Of course, the valve assembly 8 may further include a flow regulating unit, the flow regulating unit includes a coil assembly 81, a valve core assembly 82, and the like, the valve body 80 is provided with a mounting cavity 801 and a valve cavity 803, the sensor 100 is at least partially accommodated in the mounting cavity 801, and the valve core assembly 82 is at least partially accommodated in the valve cavity 803. The coil assembly 81 comprises a stator coil and the like, the valve core assembly 82 comprises a valve seat, a valve core, a rotor assembly and the like, the stator coil is sleeved on the outer peripheral side of the rotor assembly, the rotor assembly can drive the valve core to move, the valve core can move relative to the valve seat, the valve seat is provided with a valve port, and the valve core is close to and far away from the valve port so as to change the opening degree of the valve port and further form throttling at the valve port. The flow regulating unit may be embodied as an electronic expansion valve.
The valve assembly 8 may further include a pressing nut 88 and a main control board 86, the pressing nut 88 presses the sensor 100 in the mounting cavity 801, the main control board 86 is electrically connected to the conductive member 7 of the sensor 100, the conductive member 7 may be a conductive spring as illustrated in fig. 5, a portion of the conductive spring is received in the inner cavity of the sensor 100 and electrically connected to the detecting unit 2, and another portion of the conductive spring is exposed out of the housing 1 through the through hole 121. Thus, the main control board 86 can receive the electrical signal of the detecting unit 2 by contacting with the conductive spring. The conductive member 7 may also be a conductive wire as illustrated in fig. 18, and the electrical signal of the sensing module 23 may also be transmitted to the main control board 86 through the conductive wire.
The structure of the sensor 100 is described in detail below, and the sensor 100 includes a housing 1, a detection unit 2, and a filter member 3. The sensor 100 has an internal cavity 200 and a first flow channel 400 that do not communicate. The housing 1 encloses at least part of the inner cavity.
In some embodiments, the housing 1 includes a first case 11 and a second case 12, and the first case 11 and the second case 12 are assembled and fixed. Part of the housing of the first shell 11 is arranged circumferentially around the detection unit 2.
The first housing 11 is provided with a receiving hole 13, and the filter element 3 is at least partially received in the receiving hole 13.
The detection unit 2 includes a plate member 21 and a sensing module 23. The sensing module 23 is fixed to the plate member 21. The sensing module 23 may have a fluid signal sensing region 231 exposed to the first flow channel 400. At least part of the second housing 12 and the filter member 3 are respectively located on different sides of the plate member 21 in the height direction H of the sensor.
The sensing module 23 may be a separate component type sensing chip, specifically, the sensing chip may be a back pressure type pressure chip, or a positive pressure type pressure chip or a MEMS pressure chip using a flip chip bonding method, and a sensing area of the sensing chip may be in direct contact with a fluid such as a refrigerant to sense pressure. Of course, the sensing chip can also integrate the temperature and pressure sensing functions at the same time, and the fluid signal sensing area 231 thereof includes a temperature sensing area and a pressure sensing area.
Alternatively, the sensing module 23 includes a sensing chip and a structure cooperating with the sensing chip, for example, when the sensing chip is a positive pressure chip, the sensing module 23 further includes other structural members such as a gel material covering the surface of the sensing chip, so that on one hand, the fluid contacts the gel material, the gel material contacts the fluid signal sensing area 231 of the sensing chip, and the pressure signal of the fluid can be indirectly transmitted to the sensing chip through the gel material. On the other hand, the gel material can also protect the sensing chip, especially the binding wires of the sensing chip, from falling off or being damaged by the fluid impact, and the sensing chip is not easily corroded by the fluid.
The board member 21 may be a PCB circuit board, and specifically, the board member 21 may be a flexible circuit board or a hard board having a certain thickness. Or the plate member 21 may be a generally flat plate structure that may function to support and secure the sensing module 23.
The plate member 21 includes a first surface 211 and a second surface 212 respectively located on different sides in a thickness direction thereof, and the plate member 21 may be a ceramic circuit board or a general ceramic plate of a circular or rectangular or other shape. The first surface 211 is an upper side surface of the plate member 21 illustrated in fig. 10, and the second surface 212 is a lower side surface illustrated in fig. 10.
The filter member 3 may function to filter impurities of a working medium such as a refrigerant. The filter member 3 includes a screen portion 31 and a fixing portion, the screen portion 31 is provided with a plurality of meshes 311, and a working medium such as a refrigerant can pass through the meshes 311. The first flow channel 400 is located on the side of the screen portion 31 near the plate member 21 in the height direction H of the sensor. The mesh 311 communicates with the first flow channel 400.
Alternatively, the sensing module 23 and the filter member 3 are located on different sides of the plate member 21 in the height direction H of the sensor, respectively. As illustrated in fig. 10, the sensing module 23 is located on the side of the first surface 211 of the plate member 21, and the filter member 3 is located on the side of the second surface 212 of the plate member 21. Of course, the sensing module 23 and the filter member 3 may both be located on the same side of the plate member 21 in the height direction H of the sensor, as shown in fig. 18, the sensing module 23 and the filter member 3 are both located on the side of the second surface 212 of the plate member 21, and at least part of the screen portion 31 of the filter member 3 is further away from the plate member 21 than the sensing module 23. Therefore, when fluid enters the sensor 100, the fluid can more easily pass through the meshes 311 of the filter screen part 31, and then contact with the sensing module 23 through the first flow channel 400, so that impurities are more difficult to contact with the sensing module 23, and a better impurity filtering effect can be realized.
As described with reference to fig. 10, the plate member 21 is provided with the guide hole 26, the guide hole 26 penetrates the plate member 21 in the thickness direction, and the sensing module 23 and the filter member 3 are respectively located at different sides in the axial direction of the guide hole 26. The axial direction of the guide hole 26 is the vertical direction in fig. 10. The guide hole 26 is a part of the first flow channel 400.
In the embodiment shown in fig. 10, the sensor 100 further includes the main circuit board 22, the main circuit board 22 may be a common resin circuit board, the main circuit board 22 is located on the side of the first surface 211 of the board member 21, the main circuit board 22 is a plate-shaped member having a certain thickness, the main circuit board 22 has a third surface 221 and a fourth surface 222 located on different sides in the thickness direction thereof, the main circuit board 22 may be provided with circuit components on both the third surface 221 and the fourth surface 222, and the board member 21 may be a corrosion-resistant ceramic plate, which is low in cost and less likely to cause corrosion and damage to the board member 21 after the refrigerant contacts the board member 21. The board member 21 may also be provided with a small number of conductive traces on the first surface 211 side thereof. The board member 21 is fixed to the fourth surface 222 side of the main circuit board 22, and the board member 21 is electrically connected to the main circuit board 22, and referring to fig. 15, the board member 21 and the main circuit board 22 may be fixed and electrically connected by using the conductive pins 29, for example, the conductive pins 29 simultaneously penetrate the board member 21 and the main circuit board 22 so that the board member 21 and the main circuit board 22 are laminated together, and the conductive pins 29 and the board member 21 are fixed by soldering, and the conductive pins 29 and the main circuit board 22 are fixed by soldering.
The main circuit board 22 is provided with a notch portion 28, the notch portion 28 penetrates through the third surface 221 and the fourth surface 222 of the main circuit board 22, the sensing module 23 is at least partially accommodated in the notch portion 28, and the sensing module 23 is fixed to the board member 21 at the periphery of the guide hole 26. The plate member 21 may be formed with a sensing module 23 as an integral sensing module that may be separately manufactured and sold. This has the advantage that the product assembly process of the sensor 100 is more convenient. More customization needs can be achieved. Particularly, when the size requirements of the sensor 100 are not uniform, for example, the size of the main circuit board 22 is not uniform, and the size of the housing 1 is not uniform, the sensing module with uniform size and uniform specification can be processed and prepared, as long as the plate member 21 of the sensing module can be fixedly connected with the main circuit board 22. The same sensing module can be used for adapting to other structures of different types and specifications of the sensor 100. The adaptability and the application range of the sensor product are increased.
The sensing module 23 may be a back pressure type pressure sensing element, the sensing module 23 may be manufactured by a Micro Electro Mechanical System (MEMS) technology, a size of the sensing element manufactured by the MEMS technology is small, and a size of a corresponding product is generally in a millimeter level or even smaller. The sensing module 23 has a sensing cavity 27, and a signal sensing region 231 of the sensing module 23 is exposed to the sensing cavity 27, the signal sensing region 231 including a pressure sensing region. The mesh 311 of the screen section 31 communicates with the sensing chamber 27. Of course, the signal sensing region 231 of the sensing module 23 may include both a pressure sensing region and a temperature sensing region.
The core body part of the sensing module 23 is a three-layer structure, and includes a substrate layer, an intermediate layer, and a top layer, the substrate layer and the intermediate layer enclose and form a sensing cavity 27 with an opening, the sensing module 23 may further include a vacuum cavity, the vacuum cavity may be enclosed by the top layer and the intermediate layer, the vacuum cavity is disposed on the other side of the sensing cavity 27 away from the guide hole 26, the vacuum cavity is not communicated with the sensing module 23, and the vacuum cavity is favorable for ensuring that the fluid pressure sensed by the signal sensing region 231 is absolute pressure, of course, some sensing modules 23 may not be provided with a vacuum cavity, and accordingly, the fluid pressure sensed by the signal sensing region 231 is. The substrate layer can be a glass substrate, the middle layer can be a silicon crystal cell material, and the top layer can also be a glass material. The signal sensing region 231 is used for detecting pressure by a piezoresistive wheatstone bridge, and when no pressure acts on the thin film of the silicon cell when the circuit is switched on, the wheatstone bridge is balanced and the output voltage is 0. When pressure is applied to the thin film of the silicon cell, the balance of the Wheatstone bridge is broken and a voltage is output. Therefore, the pressure change can be reflected by the change of the electric signal in the detection circuit, so that the pressure detection function is realized.
The fixing manner of the sensing module 23 to the plate member 21 includes one of bonding, eutectic bonding, sintering fixing, and glass micro-melting fixing. In actual processing and manufacturing, the sensing module 23 and the plate body part can be fixed and sealed by selecting a sealant adhesive and a eutectic welding mode, and the process is simple and easy to implement. Fluid does not readily leak out of the guide bore 26 and sensing chamber 27.
Referring to fig. 16, in some embodiments, the main circuit board 22 may not be provided, the board member 21 is a ceramic circuit board or a common resin circuit board, and the first surface 211 of the board member 21 is electrically connected to a component outside the sensor 100 through a conductive structural member. The conductive structure may be embodied as the conductive spring 7 shown in fig. 5, the sensing module 23 and the filtering component 3 are respectively located at different sides of the plate component 21 along the height direction H of the sensor, and other embodiments of the sensing module 23 are similar to those in fig. 10, and are not described herein again.
The fixing portion of the filter member 3 can be fixedly connected or position-limited to at least one of the plate member 21 and the housing 1.
In the embodiment shown in fig. 10 and 16, the fixing portion includes a stent 32 and a sleeve portion 33. The sleeve portion 33 has a cylindrical cavity 331, and the first flow passage 400 includes at least part of the cylindrical cavity 331. The sleeve portion 33 has a main body portion 332 and a connecting portion 333 that are axially connected along the sleeve portion 33. The connecting portion 333 of the support 32 and the sleeve portion 33 is fixedly connected, connected in a limited manner, or integrated.
The end of the main body 332 away from the connecting part 333 is fixed to the plate member 21, and the main body 332 is hermetically connected to the plate member 21. Specifically, referring to fig. 17, the board member 21 may include a metal bonding portion 24 covered on the second surface 212 thereof by a copper-clad process, where the copper-clad process is a process of using an empty space on the second surface 212 of the board member 21 as a reference surface and then filling the empty space with solid copper, and the copper-clad process is a mature technology and is not described in detail herein. The body portion 332 and the plate member 21 may be sealed and fixed by soldering, laser welding, adhesion, or the like, so that one end of the sleeve portion 33 in the axial direction has a sealing position with respect to the second surface 212 of the plate member 21.
Alternatively, the sleeve portion 33 may be fixed to both the plate member 21 and the housing 1, and as shown in fig. 9 and 13, the outer peripheral side of the sleeve portion 33 and the hole wall of the first case 11 forming the receiving hole 13 may be connected in a sealing manner, specifically, the first case 11 includes a peripheral wall portion 14 forming the receiving hole 13, and the outer wall of the sleeve portion 33 and the peripheral wall portion 14 are fixed in a sealing manner by one of soldering, laser welding, bonding, and ultrasonic welding at least in a partial region. The sleeve portion 33 and the tubular portion 112 are welded by filling solder at, for example, a position M in fig. 13.
Thus, by sealing at the two critical positions, fluid is not easy to enter the accommodating cavity from between the sleeve portion 33 and the first shell 11 and from between the sleeve portion 33 and the plate member 21, and the sealing effect is good, so that the sleeve portion 33, the plate member and the first shell 11 are mutually matched to enable the fluid to contact the sensing module 23 after passing through the filtering component 3 and the cartridge cavity 331.
Of course, the sleeve portion 33 and the first shell 11 may be loosely fitted at the position of the receiving hole 13, i.e., not sealed therebetween, while the plate member 21 and the bottom wall of the first shell 11 may be sealingly fitted by a seal ring.
The support 32 is a hollow ring-shaped member, the support 32 circumferentially surrounds at least a portion of the filter screen portion 31, and the support 32 can play a certain supporting and shaping role on the filter screen portion 31.
The projection of the screen portion 31 and the projection of the barrel cavity 331 at least partially coincide on a plane perpendicular to the axial direction of the sleeve portion 33. Thus, the flow path of the fluid is relatively straight, and the fluid such as the working medium such as the refrigerant more easily passes through the screen portion 31.
In some embodiments, the screen portion 31 is at least partially exposed at a side of the accommodating hole 13 away from the detection unit 2. As shown in fig. 11, the screen portion 31 protrudes in a direction away from the sleeve portion 33 with respect to the holder 32 in the axial direction along the sleeve portion 33. At least a portion of screen portion 31 may be exposed to the exterior of housing 1, and screen portion 31 may be exposed to fluid earlier than other internal structural components of sensor 100, and impurities may not readily enter the interior of sensor 100. In addition, the screen part 31 protrudes to the outside of the sensor 100, so that the screen part does not occupy too much inner space of the sensor 100, and thus the first flow channel 400 of the sensor 100 can be correspondingly reduced in size, which is beneficial to the miniaturization of the sensor product.
The mesh number of the filter screen part 31 is between 200 meshes and 500 meshes. Within this range, the filtering accuracy of the filter member 3 can be ensured, and the flow resistance requirement of the sensor 100 can be satisfied. In some embodiments, the mesh size of the screen portion 31 is 350 mesh. The holder 32 and the screen unit 31 may be made of metal or plastic. The filter screen part 31 is fixed to the bracket 32 or the bracket 32 and the filter screen part 31 are integrated, and when one of the bracket 32 and the filter screen part 31 is made of plastic, the bracket 32 and the filter screen part 31 are integrated by using the filter screen part 31 as an insert injection molding. When the bracket 32 and the screen part 31 are made of metal, the bracket 32 and the screen part 31 may be fixed by welding.
In some embodiments, referring to fig. 11, the connecting portion 333 includes a first position limiting portion 34, a second position limiting portion 36, and an intermediate portion 35. The first stopper portion 34 and the second stopper portion 36 are respectively located on different sides of the intermediate portion 35 in the axial direction of the sleeve portion 33. The first stopper portion 34 is connected between the main body portion 332 and the intermediate portion 35.
The first stopper portion 34 and the second stopper portion 36 each protrude in the axial direction of the sleeve portion 33 with respect to the intermediate portion 35. The bracket 32 is at least partially positioned between the first and second stops 34, 36. The bracket 32 abuts against the inner wall of the intermediate portion 35. Therefore, the holder 32 and the sleeve portion 33 are in an interference fit relationship at the position of the intermediate portion 35, and the first stopper portion 34 and the second stopper portion 36 respectively position the holder 32 in the vertical direction, so that the holder 32 does not move in the axial direction of the sleeve portion 33, and the position of the holder 32 is relatively stable and is not easily detached from the sleeve portion 33.
The above-mentioned stopper may be processed in various manners, and in one embodiment provided in the present application, the first stopper 34 is formed with a recess 37 at the outer circumferential surface of the sleeve portion 33, and the second stopper 36 is formed with a recess at the outer circumferential surface of the sleeve portion 33, as shown in fig. 12, the first stopper 34 is prepared by notching, and correspondingly, a recess 37 is formed at the outer circumferential surface of the sleeve portion 33, the second stopper 36 is formed by riveting the end of the sleeve portion 33, that is, the end of the sleeve portion 33 is kept in a vertical state, the stent 32 is inserted into the cylindrical cavity 331 of the sleeve portion 33 from the bottom of the sleeve portion 33, and after the stent 32 contacts the first stopper 34 and cannot move upward, the end of the sleeve portion 33 is riveted and bent by a riveting tool, so that the second stopper 36 is formed, and the stent 32 cannot be removed from the cylindrical cavity 331. Of course, the second position-limiting portion 36 may be formed by notching similar to the first position-limiting portion 34, which is not limited in this application. The tubular portion 112 of the first shell 11 includes a first extension portion 115 and a second extension portion 116, and the second extension portion 116 projects in the sleeve portion axial line direction with respect to the first extension portion 115. The second extending portion 116 may also be formed by a riveting process, and the second extending portion 116 and the second limiting portion 36 may be attached together to further limit the position of the sleeve 33.
In other embodiments, referring to fig. 18, the sensing module 23 and the filter member 3 are respectively located on the same side of the plate member 21 in the height direction H of the sensor, that is, the sensing module 23 and the filter member 3 are both located on the side of the second surface 212 of the plate member 21, the sensing module 23 may be fixed to the second surface 212 of the plate member 21 by flip-chip bonding, or the sensing module 23 is electrically connected to the plate member 21 by an elongated binding line. The filter element 3 is fixedly or limitedly connected to the housing 1. Specifically, the filter element 3 only includes the bracket 32, and the bracket 32 of the filter element 3 is fixedly connected or connected in a limited manner with the first housing 11. The first housing 11 includes a bottom wall portion 111 and a tubular portion 112, the bottom wall portion 111 and the tubular portion 112 are of an integral structure, and the receiving hole 13 is provided in the tubular portion 112. The detection unit 2 is fixed between the bottom wall portion 111 and the second case 12. The holder 32 is fixedly connected or connected to the tubular portion 112 in a position-limited manner, and the receiving hole 13 is connected to the mesh 311 of the filter portion 31 at a portion of the filter member 3 on the side closer to the detection unit 2.
The first shell 11 further includes a longitudinal wall 113 and a bending portion 114, the longitudinal wall 113 is circumferentially disposed around the detection unit 2, the bending portion 114 and the bottom wall portion 111 are respectively located on different sides of the longitudinal wall 113 along the height direction H of the sensor, the bending portion 114 extends towards the direction close to the axial line of the sensor 100 relative to the longitudinal wall 113, the second shell 12 abuts against the detection unit 2, and the bending portion 114 abuts against the second shell 12.
The second shell 12 has a plurality of through holes 121 penetrating through the shell, the sensor 100 further includes a conductive member 7 matching with the through holes 121, the conductive member 7 may be a conductive spring, a portion of the conductive spring is accommodated in the inner cavity of the sensor 100 and electrically connected to the detecting unit 2, and another portion of the conductive spring is exposed out of the housing 1 through the through holes 121. Thus, the external element can receive the electrical signal of the detecting unit 2 by contacting with the conductive spring. The conductive member 7 may be a conductive wire as illustrated in fig. 18, and an electric signal of the sensing module 23 may be transmitted to an external element through the conductive wire.
The first housing 11 is made of metal to facilitate the processing of the flange structure, and the second housing 12 may be made of plastic, so that the weight and cost of the sensor 100 can be reduced.
In some embodiments, the sensor 100 further includes a temperature sensing element 5, as shown in fig. 18, the temperature sensing element 5 includes a temperature sensing head 51 and a pin 52, the temperature sensing head 51 may be located outside the housing 1, a surface of the temperature sensing head 51 has a temperature sensing area capable of directly contacting with the fluid to sense a temperature signal of the fluid, and the pin 52 penetrates through the housing and is electrically connected to the circuit module of the detection unit 2. The pins 52 may be sintered, bonded, or slightly melted with glass to the first housing 11.
In some embodiments, as shown in fig. 7, 8, and 10, the detection unit 2 further includes a protective cover 25, the protective cover 25 is located on the side of the first surface 211 of the board member 21, a side wall of the protective cover 25 is fixed to the board member 21, the sensing module 23 is located between a top wall of the protective cover 25 and the first surface 211 of the board member 21, a portion of the protective cover 25 may be received in the notch portion 28 of the main circuit board 22, and the protective cover 25 may prevent dust, moisture, and the like from contacting the surface of the sensing module 23 to some extent.
In the embodiment illustrated in fig. 18, the sensor 100 further comprises a gasket 6. A gasket 6 is located in the cavity. The gasket 6 is compressed between the second surface 212 of the plate member 21 and the bottom wall portion 111 of the first case 11. The provision of the gasket 6 serves to seal the plate member 21 and the first housing 11, and also to provide a cushioning effect when the detecting unit 2 is press-fitted to the bottom wall portion 111, thereby reducing the risk of damage to the plate member 21 due to hard contact between the detecting unit 2 and the inner wall surface of the bottom wall portion 111 facing the cavity. In the embodiment shown in fig. 18, a sealing ring with certain elasticity may be used as the gasket 6, and of course, the gasket 6 may not be provided in the sensor 100, which is not described in detail herein.
The above embodiments are only used for illustrating the present application and not for limiting the technical solutions described in the present application, and the present application should be understood based on the descriptions of directions such as "front", "back", "left", "right", "upper", "lower", etc. for those skilled in the art, and although the present application has been described in detail in the present application with reference to the above embodiments, those skilled in the art should understand that those skilled in the art can still make modifications or equivalent substitutions on the present application, and all technical solutions and modifications thereof that do not depart from the spirit and scope of the present application should be covered within the scope of the claims of the present application.
Claims (10)
1. A valve assembly comprising a valve body and a sensor; the valve body is provided with an installation cavity, and at least part of the sensor is accommodated in the installation cavity;
the sensor comprises a shell and a detection unit; the sensor has a first flow channel; the detection unit comprises a plate component and a sensing module; the sensing module is connected with the plate component; the valve body is also provided with a second flow passage; at least a part of the first flow passage is located between the second flow passage and the plate member in a height direction along the sensor;
the valve assembly further comprises a filter component, the filter component comprises a filter screen part and a fixing part, and the filter screen part and the fixing part are fixedly connected or are of an integrated structure; the fixing part is fixedly connected or in limited connection with at least one of the valve body, the shell and the plate part; the first flow channel and the second flow channel are respectively positioned on different sides of the filter screen part along the height direction of the sensor; the filter screen section is provided with a plurality of meshes, the meshes are communicated with the first flow channel, and the meshes are communicated with the second flow channel.
2. The valve assembly of claim 1, wherein the sensing module and the filter member are respectively located on different sides of the plate member in a sensor height direction; alternatively, the sensing module and the filter member are both located on the same side of the plate member in the sensor height direction, and at least a portion of the screen section is farther from the plate member than the sensing module.
3. The valve assembly of claim 1, wherein the outer housing comprises a first shell and a second shell, the first shell and the second shell being assembled and secured; a partial shell of the first shell is circumferentially disposed around the detection unit; at least a part of the second case and the filter member are respectively located on different sides of the plate member in the height direction of the sensor;
the first shell is provided with an accommodating hole, and at least part of the filter component is accommodated in the accommodating hole.
4. The valve assembly of claim 3, wherein the securing portion comprises a stent and a sleeve portion, the stent and the sleeve portion are fixedly connected, connected or both in an integral structure, and the filter screen portion is fixedly connected or both in an integral structure with the stent;
the sleeve portion has a barrel cavity, the first flow passage including at least a portion of the barrel cavity; the sleeve portion has a main body portion and a connecting portion that are axially connected along the sleeve portion;
one side of the main body part, which is far away from the connecting part, is fixed with the plate part, and the main body part is connected with the plate part in a sealing way; the bracket is an annular part and is fixedly connected or in limited connection with the connecting part;
the projection of the screen part and the projection of the cartridge cavity at least partially coincide on a plane perpendicular to the axial direction of the cartridge part.
5. The valve assembly of claim 4, wherein the connecting portion includes a first position-limiting portion, a second position-limiting portion, and an intermediate portion; the first stopper portion and the second stopper portion are respectively located on different sides of the intermediate portion in an axial direction of the sleeve portion; the first limiting part is connected between the main body part and the middle part;
the first stopper portion and the second stopper portion each protrude toward the axial line direction of the sleeve portion with respect to the intermediate portion; the bracket is at least partially positioned between the first limiting portion and the second limiting portion.
6. The valve assembly according to claim 5, wherein the first stopper portion is formed with a recess at an outer peripheral surface of the sleeve portion, and/or the second stopper portion is formed with a recess at an outer peripheral surface of the sleeve portion.
7. The sensor of claim 5, wherein the screen portion is at least partially exposed at a side of the receiving hole away from the detection unit;
the bracket is abutted with the inner wall of the middle part; the support and the filter screen part are of an integrated structure formed by injection molding by taking the filter screen part as an insert, or the support and the filter screen part are fixed by welding;
the filter screen part is a filter screen made of metal; the mesh number of the filter screen part is between 200 meshes and 500 meshes; the filter mesh portion protrudes in a direction away from the sleeve portion with respect to the holder in an axial direction along the sleeve portion.
8. The valve assembly of claim 2, wherein the plate member is provided with a guide hole, and the sensing module and the filter member are respectively located at different sides in an axial direction of the guide hole; the sensing module has a sensing cavity with a signal sensing region exposed to the sensing cavity, the signal sensing region including a pressure sensing region and/or a temperature sensing region.
9. The valve assembly of claim 3, wherein the first housing includes a bottom wall portion and a tubular portion, the receiving hole being provided in the tubular portion; the detection unit is fixed between the bottom wall portion and the second case; the filtering component is fixedly connected or in limited connection with the tubular part.
10. A sensor comprising a housing, a detection unit and a filter member; the sensor has a first flow channel, the detection unit includes a plate member and a sensing module; the sensing module is connected with the plate component;
the filter component comprises a filter screen part and a fixing part, wherein the filter screen part is fixedly connected with the fixing part or the filter screen part and the fixing part are of an integral structure; the first flow channel is at least partially located between the screen section and the detection unit in a height direction along the sensor;
the fixing part is fixedly connected or in limited connection with at least one of the plate part and the shell; the filter screen part protrudes relative to the fixing part in the direction far away from the inner cavity; the filter screen part is provided with a plurality of meshes which are communicated with the first flow passage.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110481252.0A CN113266964A (en) | 2021-04-30 | 2021-04-30 | Valve assembly and sensor |
| PCT/CN2022/088898 WO2022228361A1 (en) | 2021-04-30 | 2022-04-25 | Valve assembly and sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110481252.0A CN113266964A (en) | 2021-04-30 | 2021-04-30 | Valve assembly and sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113266964A true CN113266964A (en) | 2021-08-17 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110481252.0A Pending CN113266964A (en) | 2021-04-30 | 2021-04-30 | Valve assembly and sensor |
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| Country | Link |
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| CN (1) | CN113266964A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022228361A1 (en) * | 2021-04-30 | 2022-11-03 | 杭州三花研究院有限公司 | Valve assembly and sensor |
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