CN111593533A - Method for installing detection sensor for washing machine and detection sensor for washing machine - Google Patents
Method for installing detection sensor for washing machine and detection sensor for washing machine Download PDFInfo
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- CN111593533A CN111593533A CN202010480071.1A CN202010480071A CN111593533A CN 111593533 A CN111593533 A CN 111593533A CN 202010480071 A CN202010480071 A CN 202010480071A CN 111593533 A CN111593533 A CN 111593533A
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
- D06F34/14—Arrangements for detecting or measuring specific parameters
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- Engineering & Computer Science (AREA)
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- Control Of Washing Machine And Dryer (AREA)
Abstract
The invention belongs to the technical field of washing machine sensors, and particularly relates to a detection sensor mounting method for a washing machine and a detection sensor for the washing machine. The method comprises the steps of providing a shell, wherein the bottom of the shell is provided with a bottom opening; providing a pressure conducting elastic membrane, installing the pressure conducting elastic membrane in the shell, and enabling the pressure conducting elastic membrane to seal the bottom opening; providing a pressure detection PCB, installing the pressure detection PCB in the shell, enabling a cavity to exist between the pressure detection PCB and the pressure conduction elastic membrane, and enabling a detection end of the pressure detection PCB to extend into the cavity; providing a pressure conducting medium, and injecting the pressure conducting medium into a cavity between the pressure detection PCB and the pressure conducting elastic membrane. The installation method disclosed by the invention has the advantages that the whole installation process is simple and easy to operate, the installation is convenient, and the installation efficiency is greatly improved.
Description
Technical Field
The invention belongs to the technical field of washing machine sensors, and particularly relates to a detection sensor mounting method for a washing machine and a detection sensor for the washing machine.
Background
At present, the washing machine is switched by three-level pressure intensity, and only 2 inserting pieces are needed. When the water pressure is not applied, the contact points of the two inserting pieces are disconnected. After the washing program is selected and the water level is selected, the washing machine starts to work. Water is firstly fed, when the water level reaches a certain height, the air pressure in the air chamber of the water containing barrel reaches a certain value, the air pressure is transmitted to the rubber sealing ring of the water level pressure switch through the air guide tube, the rubber sealing ring is pushed to act by overcoming the force of a spring and a torsional spring of the water level pressure switch, and the two inserting pieces are connected with each other through the contact point, so that a signal is given to the microcomputer to indicate that the selected water level is reached.
However, the structure of the sensor for detecting the water level pressure intensity is similar to that of most sensors on the market, and the sensors belong to a relatively complex type, so that the installation process is extremely troublesome, great energy consumption is brought to manufacturers, the production cost is greatly improved, and the problem of low installation efficiency is caused. Therefore, it is necessary to design a method for installing a detection sensor for a washing machine and a detection sensor for a washing machine.
Disclosure of Invention
The invention aims to provide a method for installing a detection sensor for a washing machine and the detection sensor for the washing machine, and aims to solve the technical problems of installation trouble and low installation efficiency caused by complex structure of the sensor in the washing machine in the prior art.
In order to achieve the above object, an embodiment of the present invention provides a method for installing a detection sensor for a washing machine, including the following steps;
s100: providing a shell, wherein the bottom of the shell is provided with a bottom opening;
s200: providing a pressure conducting elastic membrane, installing the pressure conducting elastic membrane in the shell, and enabling the pressure conducting elastic membrane to seal the bottom opening;
s300: providing a pressure detection PCB, installing the pressure detection PCB in the shell, enabling a cavity to exist between the pressure detection PCB and the pressure conduction elastic membrane, and enabling a detection end of the pressure detection PCB to extend into the cavity;
s400: providing a pressure conducting medium, and injecting the pressure conducting medium into a cavity between the pressure detection PCB and the pressure conducting elastic membrane.
Optionally, the step S100 further includes:
extending the periphery of the bottom of the shell towards the center direction of the bottom opening and forming an elastic membrane mounting part;
in step S200, the installing the pressure conducting elastic membrane in the housing specifically includes:
and connecting the periphery of the pressure conduction elastic membrane with the elastic membrane mounting part.
Optionally, the elastic membrane mounting part comprises a receiving platform, and the periphery of the receiving platform is curled into the shell to form a fixing convex rib;
the connecting the periphery of the pressure conduction elastic membrane with the elastic membrane mounting part specifically comprises:
and attaching the inner surface of the fixed convex edge to the periphery of the pressure conducting elastic membrane.
Optionally, in step S200, the method further includes: an elastic membrane pressing piece is further provided, and a clearance hole for avoiding the pressure conduction elastic membrane is formed in the middle of the elastic membrane pressing piece; the elastic membrane pressing member is installed in the housing such that a bottom surface of a periphery of the elastic membrane pressing member is pressed against a top surface of a periphery of the pressure conducting elastic membrane.
Optionally, the step S100 further includes:
arranging a pressing part mounting part at the bottom of the shell, and enabling the pressing part mounting part to be matched with the elastic membrane pressing part;
said mounting said elastomeric film compression member within said housing specifically comprises: and clamping the elastic membrane pressing piece in the pressing piece mounting part.
Optionally, in step S300, the pressure detection PCB includes a PCB fixing member and a detection PCB; installing the pressure detection PCB in the shell specifically includes:
the detection PCB is partially clamped on the PCB fixing piece, and then the PCB fixing piece is installed in the shell.
Optionally, the installing the PCB board fixing member in the housing further includes:
a fixing part support is further provided, the fixing part support comprises a support frame, and a plurality of support columns are arranged at the bottom of the support frame; in the step S300, the bottom of the supporting column is pressed on the elastic film pressing member, and then the upper surface of the supporting frame is contacted with the PCB fixing member.
Optionally, the PCB fixing member is provided with a plurality of medium guide holes, and the bottom of each medium guide hole is outwardly expanded to form a medium outwardly expanded groove; the step S400 specifically includes:
providing a pressure conducting medium;
and injecting the pressure conducting medium into the shell through the medium guide hole until the pressure conducting medium fills the cavity between the pressure detection PCB and the pressure conducting elastic membrane.
Optionally, in the step S400, a silica gel fixing member is further provided, the silica gel fixing member is first disposed in the casing and is used for plugging each of the dielectric guiding holes, and then the silica gel fixing member is connected to the detection PCB and is used for wrapping a local portion of the detection PCB.
One or more technical schemes in the method for installing the detection sensor for the washing machine provided by the embodiment of the invention at least have one of the following technical effects: according to the invention, the pressure conducting elastic membrane is firstly installed in the shell, the pressure conducting elastic membrane is sealed with the bottom opening, the pressure detection PCB is installed in the shell, a cavity is formed between the pressure detection PCB and the pressure conducting elastic membrane, the detection end of the pressure detection PCB extends into the cavity, and finally the pressure conducting medium is injected into the cavity between the pressure detection PCB and the pressure conducting elastic membrane, so that the assembly is completed.
In order to achieve the above object, an embodiment of the present invention further provides a detection sensor for a washing machine, wherein the detection sensor for a washing machine is installed and formed by the installation method of the detection sensor for a washing machine.
One or more technical schemes in the detection sensor for the washing machine provided by the embodiment of the invention at least have one of the following technical effects: the detection sensor for the washing machine is formed by installation by using the installation method of the detection sensor for the washing machine, so the detection sensor for the washing machine also has the advantages of simple and easy installation process, convenient installation and greatly improved installation efficiency.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a schematic overall structure diagram of a detection sensor for a washing machine according to an embodiment of the present invention;
fig. 2 is an exploded view of a detection sensor for a washing machine according to an embodiment of the present invention;
fig. 3 is a schematic cross-sectional view of a detection sensor for a washing machine according to an embodiment of the present invention;
FIG. 4 is a schematic view of the structure of FIG. 3 from another perspective;
fig. 5 is a schematic cross-sectional view illustrating a casing of a detection sensor for a washing machine according to an embodiment of the present invention;
fig. 6 is a schematic view of an overall structure of a pressure conductive elastic membrane of a detection sensor for a washing machine according to an embodiment of the present invention;
FIG. 7 is a schematic view illustrating another structure of a pressure conductive elastic membrane of the detecting sensor for washing machine of FIG. 6;
fig. 8 is a schematic view illustrating an overall structure of a pressure conductive elastic membrane of a detection sensor for a washing machine according to another embodiment of the present invention;
FIG. 9 is a schematic cross-sectional view of the pressure conductive elastic membrane of the detecting sensor for washing machine of FIG. 8;
fig. 10 is a sectional view of a pressure conductive elastic membrane of a detecting sensor for a washing machine according to another embodiment of the present invention;
fig. 11 is a sectional view of a pressure conductive elastic membrane of a detecting sensor for a washing machine according to another embodiment of the present invention;
fig. 12 is a schematic cross-sectional view illustrating a detecting sensor for a washing machine according to another embodiment of the present invention;
fig. 13 is a schematic cross-sectional view illustrating a casing of a detection sensor for a washing machine according to another embodiment of the present invention;
fig. 14 is a schematic circuit diagram of a detection circuit of a detection sensor for a washing machine according to an embodiment of the present invention;
fig. 15 is a circuit block diagram of a detection circuit of a detection sensor for a washing machine according to an embodiment of the present invention;
FIG. 16 is a schematic circuit diagram of a water pressure and temperature detection circuit of the detection circuit according to another embodiment of the present invention;
fig. 17 is a circuit block diagram of a detection circuit of a detection sensor for a washing machine according to another embodiment of the present invention;
fig. 18 is a flowchart of a method for installing a detecting sensor in a washing machine according to another embodiment of the present invention.
Wherein, in the figures, the respective reference numerals:
a detection circuit 100, an interface circuit 110, a voltage conversion circuit 120, an input protection circuit 121, a main control circuit 130, a water pressure and temperature detection circuit 140, an internal detection circuit 141, an external detection circuit 142, a vibration detection circuit 150, a washing machine main control panel 180, a pressure conduction elastic membrane 200, a pressure conduction internal concave portion 210, a middle external convex portion 220, a first convex close-fitting portion 230, a front convex close-fitting portion 241, a back convex close-fitting portion 242, a single-side convex close-fitting portion 250, a housing 300, a bottom opening 310, an upper opening 320, an elastic membrane mounting portion 330, a receiving platform 331, a fixing rib 332, a pressing piece mounting portion 340, a fixing piece mounting table 350, a pressure conduction medium 400, a pressure detection PCB 500, a PCB fixing piece 510, a medium guide hole 511, a medium external expanding groove 512, a detection PCB 520, a fixing piece bracket 530, a support frame 531, a support column 532, an elastic membrane pressing piece 600, clearance hole 610, annular laminated plate 620, tight fit column 630, silica gel mounting 700.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be illustrative of the embodiments of the present invention, and should not be construed as limiting the invention.
In the description of the embodiments of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of the present invention, "a plurality" means two or more unless specifically limited otherwise.
In the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. Specific meanings of the above terms in the embodiments of the present invention can be understood by those of ordinary skill in the art according to specific situations.
In another embodiment of the present invention, as shown in fig. 18, a detecting sensor mounting method for a washing machine includes the steps of;
s100: providing a shell 300, wherein the bottom of the shell 300 is provided with a bottom opening 310;
s200: providing a pressure conducting elastic membrane 200, installing the pressure conducting elastic membrane 200 in the housing 300, and enabling the pressure conducting elastic membrane 200 to seal the bottom opening 310;
s300: providing a pressure detection PCB 500, installing the pressure detection PCB 500 in the housing 300, and enabling the pressure detection PCB 500 and the pressure conduction elastic membrane 200 to exist between
A cavity, into which the detection end of the pressure detection PCB 500 extends;
s400: providing a pressure conducting medium, and injecting the pressure conducting medium 400 into a cavity between the pressure detection PCB 500 and the pressure conducting elastic membrane 200.
According to the invention, the pressure conduction elastic membrane 200 is firstly installed in the shell 300, the pressure conduction elastic membrane 200 is sealed and provided with the bottom opening, the pressure detection PCB 500 is installed in the shell 300, a cavity is formed between the pressure detection PCB 500 and the pressure conduction elastic membrane 200, the detection end of the pressure detection PCB 200 extends into the cavity, and finally the pressure conduction medium 400 is injected into the cavity between the pressure detection PCB 500 and the pressure conduction elastic membrane 200, so that the assembly is completed.
In another embodiment of the present invention, the step S100 further includes:
extending the periphery of the bottom of the housing 300 toward the center of the bottom opening 310 to form an elastic film mounting part 30;
in step S200, the mounting of the pressure conducting elastic membrane 200 inside the housing 300 includes:
the peripheral edge of the pressure conductive elastic membrane 200 is connected to the elastic membrane mounting part 330.
Specifically, the elastic membrane mounting part 330 is used to conveniently mount the pressure conductive elastic membrane 200. After the installation, the bottom surface of the periphery of the pressure conducting elastic membrane 200 contacts the top surface of the elastic membrane installation part 330 and is tightly connected with the elastic membrane installation part through an external force, so that the pressure conducting elastic membrane 200 seals the bottom opening 310. Meanwhile, due to the elastic arrangement of the pressure conduction elastic membrane 200, when the pressure conduction elastic membrane 200 is tightly connected with the elastic membrane mounting part 330 by an external force, the periphery of the pressure conduction elastic membrane 200 is elastically deformed, so that under the action of the external force, on one hand, the tight connection between the pressure conduction elastic membrane 200 and the elastic membrane mounting part is realized, on the other hand, the sealing performance of the pressure conduction elastic membrane 200 after being sealed with the bottom opening is ensured, and the dual effects of connection and sealing are realized. Specifically, in the present embodiment, an ordinary person skilled in the art may select an adhesive or a pressing member such as glue to press the pressure-conducting elastic membrane 200 onto the elastic membrane mounting portion 330 according to actual requirements, so as to connect the periphery of the pressure-conducting elastic membrane 200 with the elastic membrane mounting portion 330 by using the adhesive or pressing force of the glue.
In another embodiment of the present invention, the elastic membrane mounting portion 330 includes a receiving platform 331, and the periphery of the receiving platform 331 is curled toward the inside of the housing 300 to form a fixing protrusion 332;
the connecting the periphery of the pressure conducting elastic membrane 200 with the elastic membrane mounting part 330 specifically includes:
the inner surface of the fixing protrusion 332 is attached to the circumference of the pressure conductive elastic membrane 200.
Specifically, the upper surface of the receiving platform 331 is disposed in a planar manner, and when the pressure conducting elastic membrane 200 is mounted, the pressure conducting elastic membrane 200 is directly disposed on the receiving platform 331, so that the bottom surface of the periphery of the pressure conducting elastic membrane 200 is attached to the upper end surface of the receiving platform 331, and then the two are pressed together by using an external force. After the press-fitting, the inner surface of the fixing rib 332 is attached to the periphery of the pressure-conducting elastic membrane 200, so that not only the upper end surface of the receiving platform 331 is in contact with the elastically deformed portion of the pressure-conducting elastic membrane 200, but also the inner surface of the fixing rib of the pressure-conducting elastic membrane 200 is in contact, thereby increasing the contact area between the pressure-conducting elastic membrane 200 and the elastic membrane mounting portion 330, and improving the sealing performance in a manner of simultaneous close contact of two portions.
In another embodiment of the present invention, in step S200, the method further includes: an elastic membrane pressing piece 600 is further provided, and a clearance hole 610 for avoiding the pressure conduction elastic membrane 200 is formed in the middle of the elastic membrane pressing piece 600; the elastic membrane pressing member 600 is installed in the housing 300 such that the bottom surface of the peripheral edge of the elastic membrane pressing member 600 is pressed against the top surface of the peripheral edge of the pressure-conducting elastic membrane 200.
Specifically, the clearance hole 610 is used for not affecting the conduction of the pressure from the outside along the pressure conduction elastic membrane 200 to the inside of the housing 300. The periphery of the elastic membrane pressing piece 600 is pressed on the top surface of the periphery of the pressure conduction elastic membrane 200, so that the pressure conduction elastic membrane 200 is only in peripheral contact with the elastic membrane pressing piece 600, the pressure conduction elastic membrane 200 is guaranteed to be fixed on the premise that the function of pressure conduction of the pressure conduction elastic membrane 200 is not affected, the structural design is ingenious, the bottom surface of the periphery of the pressure conduction elastic membrane 200 is attached to the bearing platform 331 and the fixing protruding edge 332 after pressing, and the sealing performance is guaranteed.
In another embodiment of the present invention, the step S100 further includes:
arranging a pressing member mounting part 340 at the bottom of the housing 300, and arranging the pressing member mounting part 340 to be matched with the elastic film pressing member 600;
the mounting of the elastic film pressing member 600 in the housing 300 includes: the elastic membrane compression member 600 is snapped into the compression member mounting portion 340.
Further, in this embodiment, the lateral wall of casing 300 bottom to the interior indent of casing 300 forms compress tightly an installation department 340, compress tightly an installation department 340 with elasticity membrane pressing piece 600 phase-match sets up, so that external force will elasticity membrane pressing piece 600 install in when compressing tightly an installation department 340, elasticity membrane pressing piece 600 just block in the casing 300 and fixed pressure conduction elastic membrane 200 makes pressure conduction elastic membrane 200 take place elastic deformation and make its peripheral bottom surface and side respectively with accept platform 331 with the laminating of fixed bead 332.
Further, the elastic film pressing member 600 comprises an annular pressing plate 620, the periphery of the annular pressing plate 620 extends in a direction perpendicular to the annular pressing plate 620 to form a tight fitting column 630, the bottom surface of the tight fitting column 630 is abutted to the bearing platform 331, and the outer side of the tight fitting column 630 is tightly fitted and connected with the inner surface of the pressing member mounting part 340. In this embodiment, the area and the shape of the annular pressing plate 620 are both matched with the area and the shape of the periphery of the pressure conducting elastic membrane 200, so that the annular pressing plate 620 is exactly pressed on the periphery of the pressure conducting elastic membrane 200, and the pressure conducting effect of the pressure conducting elastic membrane 200 is not affected when the pressure conducting elastic membrane 200 is fixed. In addition, the bottom surface of the tight fitting column 630 is abutted to the bearing platform 331, and the outer side of the tight fitting column 630 is tightly connected with the inner surface of the pressing part mounting part 340 in a tight fit manner, so that the elastic film pressing part 600 can be mounted, and meanwhile, the possibility that other outside or liquid permeates into the shell can be sealed, and the sealing performance is further improved.
In another embodiment of the present invention, in the step S300, the pressure detection PCB 500 includes a PCB fixing member 510 and a detection PCB 520; the mounting of the pressure detection PCB 500 in the housing 300 includes:
the detection PCB 520 is partially clamped on the PCB fixing member 510, and then the PCB fixing member 510 is installed in the housing 300.
In this embodiment, the PCB fixing member 510 is made of rubber, and the PCB fixing member 510 and the detection PCB 520 are connected by low-temperature injection molding. After the bottom of the PCB fixing member 510 is attached to the upper end surface of the pressure conducting medium 400, the pressure conducting medium 400 is filled in the cavity between the PCB fixing member 510 and the pressure conducting elastic membrane 200 without any excess liquid or gas, so that the external pressure is completely conducted to the detection PCB 520 after passing through the pressure conducting elastic membrane 200 and then the pressure conducting medium 400, and the influence of excess substances in the pressure conducting medium 400 on the conduction of the pressure is avoided, thereby ensuring the high efficiency and accuracy of the conduction of the pressure to the detection PCB 520, and further improving the pressure detection precision.
In another embodiment of the present invention, the mounting the PCB board holder 510 in the housing 300 further comprises:
a fixing piece bracket 530 is further provided, the fixing piece bracket 530 comprises a supporting frame 531, and a plurality of supporting columns 532 are arranged at the bottom of the supporting frame 531; in the step S300, the bottom of the supporting column 532 is pressed on the elastic film pressing member 600, and then the upper surface of the supporting frame 532 contacts the PCB fixing member 510.
The fixing bracket 530 is used for fixing the PCB fixing member 510, and simultaneously, the PCB fixing member 510 is installed behind the fixing bracket 530, the PCB fixing member 510 gives the pressure on the fixing bracket 530 and the gravity of the fixing bracket 530 all fall on the elastic film pressing member 200, thereby fixing the PCB fixing member 510 and simultaneously having the pressing effect on the elastic film pressing member 600, which has extremely high practicability.
In another embodiment of the present invention, as shown in fig. 2 to 5, the fixing member bracket 530 includes a supporting frame 531, and a plurality of supporting columns 532 are disposed at the bottom of the supporting frame 531; the upper surface of the support frame 531 contacts the PCB fixing member 510, and the bottom of the support column 532 is pressed against the elastic film pressing member 600. In this embodiment, the support frame 531 is disposed in a flat plate shape, and an upper surface of the flat plate-shaped support frame 531 contacts and adheres to the PCB fixing member 510, so as to improve the relative stability of the two. The supporting columns 531 are arranged at equal intervals to ensure the balance of the overall stress of the fixing piece bracket 530. In addition, each of the supporting columns 532 is disposed in a cylindrical shape, and is matched with the flat-plate-shaped supporting frame 531, so that while the supporting function is ensured, the volume occupied by the fixing member bracket 530 in the cavity between the PCB fixing member 510 and the pressure conduction elastic membrane 200 is reduced, so as to ensure that the cavity occupied by the pressure conduction medium 400 between the PCB fixing member 510 and the pressure conduction elastic membrane 200 occupies a larger volume, thereby ensuring the high efficiency and stability of the internal and external pressure conduction.
In another embodiment of the present invention, the PCB fixing member 510 is provided with a plurality of medium guiding holes 511, and the bottom of each medium guiding hole 511 is outwardly expanded to form a medium outwardly expanded groove 512; the step S400 specifically includes:
providing a pressure conducting medium 400;
the pressure conducting medium 400 is injected into the housing 300 through the medium guide hole 511 until the pressure conducting medium 400 fills the cavity between the pressure detection PCB 500 and the pressure conducting elastic membrane 200.
Specifically, each of the medium guide holes 511 is used to inject the pressure conductive medium 400 into a cavity between the PCB board fixture 510 and the pressure conductive elastic membrane 200. During actual assembly, the PCB board fixing member 510 is installed in the housing 300, the pressure conducting medium 400 is injected through the medium guide holes 511, and after the pressure conducting medium 400 is filled, a vacuum pumping process is performed on a cavity between the PCB board fixing member 510 and the pressure conducting elastic membrane 200, so as to extract excessive gas. In the process of injecting the pressure conducting medium 400, the medium outward-expanding groove is used for accelerating the outflow of the pressure conducting medium 400, so that the liquid injection efficiency is improved, and the problem of blockage during liquid injection is prevented.
In another embodiment of the present invention, in the step S400, a silicone fixing member 700 is further provided, the silicone fixing member 700 is firstly disposed in the housing 300, the silicone fixing member 700 is made to block each medium guiding hole 511, the silicone fixing member 700 is then connected with the detection PCB 520, and the silicone fixing member 700 is made to cover a part of the detection PCB 520.
In this embodiment, the silicone fixing member 700 is made of silicone. After the pressure conducting medium 400 is injected and vacuumized, silica gel is injected into the housing 300, and the housing is kept still for a preset time until the silica gel is solidified, so that the silica gel fixing member 400 is formed, the medium guide hole 512 is blocked after the silica gel fixing member 400 is solidified, so that the pressure conducting medium 400 is ensured to be located in a sealed cavity, and in addition, the silica gel fixing member 700 is adhered to the inner side wall of the PCB fixing member 510 and the inner side wall of the housing 300 in the solidification process, so that the pressure conducting medium 400 is fixed in the housing 300 and the PCB fixing member 510 is fixed at the same time.
In an embodiment of the present invention, as shown in fig. 1 to 5, there is also provided a detection sensor for a washing machine, which is installed and formed by the above-mentioned method for installing the detection sensor for a washing machine.
The detection sensor for the washing machine includes a housing 300, a pressure conductive elastic membrane 200, a pressure conductive medium 400, and a pressure detection PCB 500.
The bottom of the housing 300 is provided with a bottom opening 310, the top of the housing 300 is provided with an upper opening 320, and the pressure conducting elastic membrane 200, the pressure conducting medium 400 and the pressure detection PCB 500 are sequentially installed in the housing 300 from the upper opening 320. The pressure conducting elastic membrane 200 is installed in the housing 300 and then seals the bottom opening 310, the pressure conducting medium 400 is accommodated in the housing 300 and is arranged to press the pressure conducting elastic membrane 200, the pressure detecting PCB 500 is installed in the housing 300 and is arranged to press the pressure conducting medium 400, and the detecting end of the pressure detecting PCB 500 extends into the pressure conducting medium 400, so that external pressure is conducted to the detecting end of the pressure detecting PCB 500 after sequentially passing through the pressure conducting elastic membrane 200 and the pressure conducting medium 400, and then the pressure detecting PCB 500 detects the external pressure.
In the invention, by arranging the housing 300, the pressure conducting elastic membrane 200, the pressure conducting medium 400 and the pressure detecting PCB 500, accommodating the pressure conducting medium 400 in the housing, installing the pressure detecting PCB 500 in the housing 300 and pressing the pressure conducting medium 400, and arranging the detecting end of the pressure detecting PCB 500 to extend into the pressure conducting medium 400, when detecting external pressure, the external pressure can sequentially pass through the pressure conducting elastic membrane 200 and the pressure conducting medium 400 and then be conducted to the detecting end of the pressure detecting PCB 500, so that the pressure detecting PCB 500 detects the external pressure, compared with the prior art, the present application arranges the pressure conducting medium 400 between the pressure conducting elastic membrane 200 and the pressure detecting PCB 500, the external pressure is conducted to the pressure detection PCB board 500 through the pressure conduction elastic membrane 200 and the pressure conduction medium 400, so that the high-efficiency, fast and low-loss conduction of the pressure can be realized due to the elasticity of the pressure conduction elastic membrane 200 and the fluidity of the pressure conduction medium 400, the pressure detection precision is improved, the subsequent accurate control of the washing machine according to the pressure detection is realized, and the user experience is improved.
In another embodiment of the present invention, as shown in fig. 14-17, a detection circuit is disposed on the detection PCB, and the detection circuit 100 includes an interface circuit 110, a voltage conversion circuit 120, a main control circuit 130, and a water pressure and temperature detection circuit 140.
Wherein, the interface circuit 110 is connected with a washing machine main control panel 180 of the washing machine;
the voltage conversion circuit 120 is connected to the interface circuit 110;
the master control circuit 130 is connected to the voltage conversion circuit 120 and the interface circuit 110;
the water pressure and temperature detection circuit 140 is connected to the voltage conversion circuit 120 and the main control circuit 130, and the water pressure and temperature detection circuit 140 is configured to detect water pressure and temperature information in the washing machine and transmit the detected water pressure and temperature information to the main control circuit 130, so that the main control circuit 130 transmits the water pressure and temperature information to the washing machine main control board 130 through the interface circuit 110.
According to the invention, by arranging the interface circuit 110, the voltage conversion circuit 120, the main control circuit 130 and the water pressure and temperature detection circuit 140, and connecting the water pressure and temperature detection circuit 140 with the voltage conversion circuit 120 and the main control circuit 130, the water pressure and temperature detection circuit 140 detects the water pressure and temperature reaching the water pressure and temperature detection circuit 140 after being sequentially transmitted to the pressure transmission medium 400 through the pressure transmission elastic membrane 200, and transmits the detected water pressure and temperature information to the main control circuit 130, so that the main control circuit 130 transmits the water pressure and temperature information to the main control board 180 of the washing machine through the interface circuit 110, therefore, the water temperature and water pressure can be detected by the water pressure and temperature detection circuit 140, without arranging a plurality of branch sensors, the production cost is reduced, and simultaneously, compared with a mechanical structure, the water temperature and the water pressure are measured, the accuracy rate of the measured water pressure and temperature information is higher, and the practicability is high.
In another embodiment of the present invention, as shown in fig. 14, the main control circuit 130 includes a main control chip U2, and the main control chip U2 is connected to the voltage conversion circuit 120, the interface circuit 110 and the water pressure and temperature detection circuit 140. Specifically, the model of the main control chip U2 in this embodiment is preferably STM8S003 or the same type of chip is selected by a person skilled in the art according to actual needs.
In another embodiment of the present invention, as shown in fig. 14, the water pressure and temperature detecting circuit 140 includes a water pressure and temperature detecting chip U3, the water pressure and temperature detecting chip U3 is connected to the voltage converting circuit 120, a data transmission pin of the temperature detecting chip U3 is connected to a data transmission pin of the main control chip U2, and a clock control pin of the temperature detecting chip U3 is connected to a clock control pin of the main control chip U2. Specifically, the data transmission pin of the temperature detection chip U3 is an SDA pin, and the clock control pin of the temperature detection chip U3 is an SCL pin. In this embodiment, the third pin of the temperature detecting chip U3 is connected to the eleventh pin of the main control chip U2, and the fourth pin of the temperature detecting chip U3 is connected to the twelfth pin of the main control chip U2. The model of the water pressure and temperature detection chip U3 is preferably DPS 310.
The DPS310 digital pressure sensor is a miniature atmospheric pressure sensor with high accuracy and low current consumption. The sensor is based on the principle of capacitive sensing, and is capable of measuring pressure and temperature. This guarantees to have high accuracy in the temperature variation process, through adopting this sensor, has greatly improved the precision and the accuracy of data measurement.
The internal signal processor of the DPS310 converts the output of the pressure and temperature sensor elements into a 24-bit result, each cell is individually calibrated, and calibration coefficients calculated in this process are stored in a calibration register, and these coefficients are used for applications of converting the measurement results into high-precision pressure and temperature values, so that temperature and water pressure can be measured at a time by one of the temperature sensing chips U3, which is efficient and convenient.
In another embodiment of the present invention, as shown in fig. 14, the voltage converting circuit 120 includes a voltage stabilizing chip U1, an input pin of the voltage stabilizing chip U1 is connected to a power supply output terminal of the main control board 180 of the washing machine, and an output pin of the voltage stabilizing chip U1 is connected to a power supply pin of the main control chip U2 and a power supply pin of the water pressure and temperature detecting chip U3, respectively, and supplies power to the main control chip U2 and the water pressure and temperature detecting chip U3. In this embodiment, the reference numeral of the power supply output terminal of the main control board 180 of the washing machine is VIN. An input pin of the voltage regulation chip U1 is a second pin of the voltage regulation chip U1, an output pin of the voltage regulation chip U1 is a third pin of the voltage regulation chip U1, and voltage output by a power supply output end of the washing machine main control board 180 is converted by the voltage regulation chip U1 and then is output by 3.3V from the third pin. The power supply pin of the main control chip U2 is a ninth pin, and the power supply pin of the water pressure and temperature detection chip U3 is an eighth pin. The model of the voltage stabilizing chip U1 is preferably TLV 70433.
In another embodiment of the present invention, as shown in fig. 14 to 15, the voltage converting circuit 120 further includes an input protection circuit 121, and the input protection circuit 121 is disposed between the power supply output terminal of the main control board 180 of the washing machine and the input pin of the regulator chip U1.
In another embodiment of the present invention, as shown in fig. 14, the input protection circuit 121 includes a self-healing fuse JZ1, and two ends of the self-healing fuse JZ1 are respectively connected to the power supply output terminal of the main control board 180 of the washing machine and the input pin of the voltage regulation chip U1. When the current passing through the self-recovery fuse JZ1 is too large, the resistance of the self-recovery fuse JZ1 becomes large, thereby functioning as a protection circuit.
In another embodiment of the present invention, as shown in fig. 14, the input protection circuit 121 further includes a protection diode D1, a cathode of the protection diode D1 is connected to the input pin of the zener chip U1, and an anode of the protection diode D1 is grounded. The protection diode D1 is used to prevent the subsequent circuit from being damaged by the surge or spike of the voltage output from the power supply output terminal of the main control board 180 of the washing machine.
In another embodiment of the present invention, as shown in fig. 14, the interface circuit 110 includes a connection port J4, a first pin of the connection port J4 is connected to a serial input pin of the main control chip U2, a third pin of the connection port J4 is connected to a serial output pin of the main control chip U2, a second pin of the connection port J4 is grounded, and a fourth pin of the connection port J4 is connected to a power supply output terminal of the main control board 180 of the washing machine.
Specifically, a serial port input pin of the main control chip U2 is an RX pin, and a serial port output pin of the main control chip U2 is a TX pin, in this embodiment, the first pin of the connection port J4 is connected to the third pin of the main control chip U2, and the third pin of the connection port J4 is connected to the second pin of the main control chip U2. Thus, parameters of the water pressure and temperature detection chip U3 are configured through the communication mode of I2C, the main control chip U2 obtains water pressure and temperature information detected by the water pressure and temperature detection chip U3 through the communication mode of I2C, and the main control chip U2 analyzes the water pressure information to obtain water level height information in a water tub of the washing machine through the received water pressure and temperature information and obtains water temperature information through analyzing the temperature information. Then, the main control chip U2 sends the water level height information and the water temperature information to the washing machine main control board 180 through the connection port J4, so that the washing machine main control board 180 controls the washing machine to work according to the water level height information and the water temperature information.
In another embodiment of the present invention, as shown in fig. 14-15, the detection circuit 100 further includes a vibration detection circuit 150, the vibration detection circuit 150 is connected to the main control circuit 130 and the voltage conversion circuit 120, the vibration detection circuit 150 is configured to detect vibration information of the washing machine, transmit the vibration information to the main control circuit 130, and transmit the vibration information to the main control board 180 of the washing machine through the interface circuit 110 by the main control circuit 130.
Specifically, the vibration detection circuit 150 includes a vibration detection chip U4, the first pin of the vibration detection chip U4 is connected to the third pin of the voltage stabilization chip U1, the fourteenth pin of the vibration detection chip U4 is connected to the twelfth pin of the main control chip U2, and the thirteenth pin of the vibration detection chip U4 is connected to the eleventh pin of the main control chip U2. In this embodiment, the model of the vibration detection chip U4 is preferably ADXL345 or the same model thereof.
In another embodiment of the present invention, as shown in fig. 16 to 17, the water pressure and temperature detecting circuit 140 includes an internal detecting circuit 141 and an external detecting circuit 142, and both the internal detecting circuit 141 and the external detecting circuit 142 are connected to the main control circuit 130; the built-in detection circuit 141 is used for detecting the water pressure in the water tub of the washing machine, and the external detection circuit 142 is used for detecting the atmospheric pressure outside the water tub of the washing machine.
Specifically, the internal detection circuit 141 and the external detection circuit 142 respectively include a water pressure and temperature detection chip. In this embodiment, the reference number of the water pressure and temperature detecting chip of the built-in detecting circuit 141 is U3, that is, the built-in detecting circuit 141 includes a water pressure and temperature detecting chip U3. The external detection circuit has a water pressure and temperature detection chip labeled as U5, i.e., the external detection circuit 142 includes a water pressure and temperature detection chip U5.
The water pressure and temperature detection chip U3 and the third pin and the fourth pin of the water pressure and temperature detection chip U5 are respectively connected with the eleventh pin and the twelfth pin of the main control chip U2.
Wherein, the fifth pin of water pressure and temperature detection chip U3 is unsettled, makes I2C of water pressure and temperature detection chip U3 is 1 from the most significant bit of address, the fifth pin ground connection of water pressure and temperature detection chip U5 makes I2C of water pressure and temperature detection chip U5 is 0 from the least significant bit of address, thereby makes main control chip U2 can distinguish according to following the address water pressure and temperature detection chip U3 with water pressure and temperature detection chip U5, and can realize alone main control chip U2 with water pressure and temperature detection chip U3 with water pressure and temperature detection chip U5 communication.
Further, in practical applications, the detection end of the water pressure and temperature detecting chip U3 of the built-in detection circuit 141 is located at the bottom of the water tub of the washing machine, that is, the pressure of the water in the water tub is opposite to the detection end of the water pressure and temperature detecting chip U3 of the built-in detection circuit 141, the pressure is actually the pressure of the water plus the pressure of the atmospheric pressure, and the main control chip U2 converts the sum of the pressure of the water and the atmospheric pressure into water level height information in the water tub and sends the information to the main control board of the washing machine.
If the washing machine is located on a higher floor, such as twenty-first floor, the difference between the atmospheric pressure of twenty-first floor and the atmospheric pressure of twenty-second floor is too large, and if the sum of the water pressure and the atmospheric pressure is directly converted into the height information of the water level in the water bucket in the twenty-first floor, a large error is generated, so that the detection of the water level in the washing machine is inaccurate, and the work of the washing machine is influenced. Therefore, in the present application, by providing the external detection circuit 142 and making the water pressure and temperature detection chip U5 of the external detection circuit 142 be outside the region covered by the water level of the water tub, so that the external detection circuit 142 detects the atmospheric pressure outside the water tub of the washing machine, the main control chip U2 subtracts the pressure value detected by the water pressure and temperature detection chip U3 of the internal detection circuit 141 from the pressure value detected by the water pressure and temperature detection chip U5 of the external detection circuit 142, so as to obtain the pressure value of the actual water level, and then converts the pressure value of the actual water level to obtain the height information of the actual water level inside the water tub, so that the internal detection circuit 141 and the external detection circuit 142 are provided to eliminate the influence of the external atmospheric pressure change on the water level detection inside the water tub in the washing machine, thereby realizing accurate measurement, the practicability is extremely high.
In another embodiment of the present invention, as shown in fig. 6-7, a side of the pressure conducting elastic membrane 210 facing away from the pressure conducting medium 400 is expanded in a direction facing the pressure conducting medium 400 and extended to form a plurality of pressure conducting concave parts 210.
According to the invention, the pressure conducting elastic membrane 200 is arranged, and one side of the pressure conducting elastic membrane 200, which is far away from the pressure conducting medium, is extended towards the direction of the pressure conducting medium 400 and extends to form the plurality of pressure conducting inner concave parts 210, so that when the detection sensor for the washing machine is used, the pressure of water can be transmitted to the other side of the pressure conducting elastic membrane 200 along the plurality of pressure conducting inner concave parts 210 which are concave inwards, namely transmitted into the shell 300 from the outside of the shell, compared with a plane type membrane structure in the prior art, the pressure conducting inner concave parts 210 in the application have a better guiding effect on the pressure conduction on one hand and have a high-efficiency pressure conducting effect on the other hand, thereby improving the detection efficiency and accuracy and having extremely high practicability.
In another embodiment of the present invention, as shown in FIG. 8, each of the pressure conducting inner recesses 210 is disposed in a ring shape. When the detection sensor for the washing machine is used, one side surface of the pressure conduction elastic membrane 200 bears the pressure of water in a washing tub of the washing machine, and the pressure is conducted to the inside of the shell 300 through the pressure conduction elastic membrane 200 after being conducted to the other side surface of the pressure conduction elastic membrane 200. That is, when water is present in the water tub of the washing machine, the pressure of the water acts on each of the pressure conduction concave parts 210, and the pressure conduction concave parts 210 are set to have a ring shape, so that the water is conducted to the other side surface of the pressure conduction elastic membrane 200 along the ring shape of the pressure conduction concave parts 210 during pressure conduction, thereby better conducting the pressure caused by the water, and further ensuring the accuracy of subsequent pressure measurement. In this embodiment, each of the pressure conducting inner concave portions 210 is disposed in a circular ring shape. In this embodiment, the number of the pressure conducting inner recesses 210 is one.
In another embodiment of the present invention, as shown in fig. 6-7, the pressure conducting inner recesses 210 in the shape of a ring are equally spaced. Therefore, when the pressure of water acts on the pressure conduction concave part 210, the water can be uniformly conducted into the shell along the pressure conduction concave part 210, so that a high pressure conduction effect is ensured. In this embodiment, the number of the pressure conducting inner recesses 210 is two.
In another embodiment of the present invention, the center of each of the pressure conducting inner recesses 210 having a ring shape is the same as the center of the pressure conducting elastic membrane 200. That is, the center of each of the annular pressure conduction inner recesses 210 is the center of the pressure conduction elastic membrane 200, so that the stability of the overall structure of the pressure conduction elastic membrane 200 is ensured, the pressure of water is better supported, and the service life is prolonged.
In another embodiment of the present invention, as shown in fig. 6 to 9, each of the pressure conduction inner concave portions 210 is arranged in a stepped-down manner from the outer edge of the pressure conduction elastic membrane 200 toward the center of the pressure conduction elastic membrane 200. That is, the inward concave degree of each of the pressure conduction inner concave portions 210 decreases in sequence from the outer edge of the pressure conduction elastic film 200 to the center direction of the pressure conduction elastic film, and it can be understood that the inward concave surface of the pressure conduction inner concave portion 210 beside the center of the pressure conduction elastic film 200 is the lowest surface of the inward concave surface of each of the pressure conduction inner concave portions 210. Compared with the prior art, the planar structure has the advantages that the pressure conducting concave parts 210 are arranged in a step-down mode, so that the pressure can be transferred step by step along the pressure conducting concave parts 210 during pressure conduction, and the pressure conducting efficiency is improved. On the other hand, the pressure conducting elastic membrane 200 is integrally in a shape that one surface is recessed towards the other surface, when the pressure conducting elastic membrane 200 contacts water, each pressure conducting concave portion 210 has a flow guiding function, and in the flow guiding process, the pressure of the water also acts on each pressure conducting concave portion 210 along with the flow guiding function, and then is conducted to the other side surface of the pressure conducting elastic membrane 200, so that the pressure conduction is realized.
In another embodiment of the present invention, as shown in fig. 8, the middle portion of the pressure conductive elastic membrane 200 extends toward the opposite direction of the concavity of the pressure conductive inner concave portion 210 and forms a middle convex portion 220. That is, the whole structure of the pressure conducting elastic membrane 200 is not arranged with one side inclined to the other side, but the middle convex part 220 opposite to the concave direction of each pressure conducting concave part 210 is convexly arranged in the middle, so that when water pressure acts on each pressure conducting concave part 210, the middle convex part 220 provides an elastic force, thereby ensuring the stability of the pressure conducting elastic membrane 200 when two sides of the structure are stressed, further ensuring that the pressure conducting elastic membrane 200 is not deformed due to continuous stress, and improving the stability of the whole structure of the elastic membrane. Specifically, the elastic force provided by the middle protruding portion 220 is a force that is diffused in the direction of the circumference of the pressure conductive elastic membrane 200 toward each of the pressure conductive inner concave portions 210 with the middle protruding portion 220 as the center.
In another embodiment of the present invention, as shown in fig. 6 to 7, the peripheral ring of the pressure-conducting elastic membrane 200 is provided with a first convex fitting part 230. In this embodiment, the first protruding close-fitting portion 230 is disposed in a circular ring shape, and when the first protruding close-fitting portion 230 is used for fixing the pressure conducting elastic membrane 200, the elastic membrane pressing member presses the first protruding close-fitting portion 230, so as to seal the bottom opening 310.
In another embodiment of the present invention, as shown in fig. 10, the peripheral edges of the two side surfaces of the pressure conducting elastic membrane 200 extend in the direction away from the pressure conducting elastic membrane 200 and form a front convex close-fitting portion 241 and a back convex close-fitting portion 242, respectively; the front protrusion close-fitting portion 241 and the back protrusion close-fitting portion 242 are symmetrically arranged. In this embodiment, protruding tight-fitting portion 241 of front with protruding tight-fitting portion 242 of reverse side is the setting of protruding form, just protruding tight-fitting portion 241 of front with protruding tight-fitting portion 242 of reverse side all is the elasticity setting, so, through protruding form protruding tight-fitting portion 241 of front with protruding tight-fitting portion 242 of reverse side makes fixedly during pressure conduction elastic membrane 200, compress tightly protruding tight-fitting portion 241 of front with protruding tight-fitting portion 242 of reverse side makes protruding tight-fitting portion 241 of front with the bellying of protruding tight-fitting portion 242 of reverse side takes place elastic deformation to guarantee the leakproofness.
In another embodiment of the present invention, as shown in fig. 11, a peripheral edge of one side surface of the pressure conducting elastic membrane 200 extends in a direction away from the pressure conducting elastic membrane 200 and forms a single-sided convex fitting portion 250, and the other side surface of the pressure conducting elastic membrane 200 is arranged in a planar manner. Specifically, a side is planar pressure conduction elastic membrane 200 be convenient for with accept platform 331 and closely laminate, another side sets up protruding tight fitting portion 250 of unilateral is so that elastic membrane pressure spare 600 is pressed and is located make it take place elastic deformation on the protruding tight fitting portion 250 of unilateral to leakproofness when keeping the installation, so, the facility and the sealing of installation are realized to the difference through two-sided setting, and is high-efficient swift.
In another embodiment of the present invention, the pressure conducting elastic membrane 200 is made of silica gel, that is, the pressure conducting elastic membrane 200 is made of elastic silica gel, and the silica gel material is adopted, so that the pressure conducting elastic membrane 200 has excellent elasticity, and when the pressure conducting elastic membrane 200 bears pressure, elastic deformation occurs rapidly, which greatly alleviates the obstruction of the hard structure of the detection material to the pressure conducting process, thereby ensuring a high-efficiency pressure conducting effect, and thus realizing accurate measurement of the pressure. Of course, the material of the pressure conducting elastic membrane 200 may also be selected from other materials as long as the requirement for conducting the pressure of the pressure conducting elastic membrane 200 can be met, and the application is not limited specifically.
In addition, this application pressure conduction elastic membrane 200 sets up for integrated into one piece, so, guarantees the high efficiency in the production process, and integrated into one piece sets up and makes pressure conduction elastic membrane 200 keeps as a whole, and the structure is more stable, improves indirectly the life of pressure conduction elastic membrane 200 to provide higher user experience for the user.
In another embodiment of the present invention, the pressure conducting medium 400 is made of silicone oil. The silicone oil has heat resistance, electrical insulation, weather resistance, hydrophobicity, physiological inertia and smaller surface tension, and also has low viscosity-temperature coefficient and higher compression resistance. On one hand, since the silicone oil has compression resistance, it can efficiently conduct the pressure conducted through the pressure conducting elastic membrane 200, and further conducted to the pressure detecting PCB 500, so as to improve the pressure conducting efficiency. On the other hand, silicone oil is also an excellent heat transfer oil, so that it can efficiently transfer water temperature by providing the silicone oil as the pressure conducting medium 400, thereby enabling the pressure detecting PCB 500 to detect the temperature of water in the tub within the washing machine. In addition, the electrical insulation of the silicone oil enables the detection end of the pressure detection PCB 500 to be soaked in the silicone oil for a long time without damaging the circuit structure on the pressure detection PCB 500, thereby ensuring that the service time and the service life of the pressure detection PCB 500 are not influenced.
In another embodiment of the present invention, the housing 300 is made of stainless steel. In production, the housing 300 is made of stainless steel by drawing. Since the stainless steel treatment process in the prior art is becoming mature, the mature process on the market can be utilized to reduce the research and development cost when manufacturing the housing 300. The case 300 made of stainless steel has a certain strength, so that the stability of the overall structure of the detection sensor for the washing machine can be ensured. In addition, the housing 300 made of stainless steel has extremely strong thermal conductivity, and thus high-efficiency heat conduction when detecting water temperature is ensured.
In another embodiment of the present invention, as shown in fig. 12-13, a partial sidewall of the middle portion of the housing 300 extends toward the outside of the housing 300 to form a fixture mounting table 350, and the fixture mounting table 350 is configured to match with the PCB board fixture 510 so that the PCB board fixture 510 is mounted on the fixture mounting table 510. In this embodiment, when the PCB fixing member 510 is installed on the fixing member installation platform 350, the sidewall of the PCB fixing member 510 is clamped on the fixing member installation platform 350, so that other fixing structures are not needed, the PCB fixing member 510 can be fixed by processing the casing 300 itself, and the production cost for producing other fixing components is saved while the fixing member is convenient and fast.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A method for installing a detection sensor for a washing machine is characterized by comprising the following steps;
s100: providing a shell, wherein the bottom of the shell is provided with a bottom opening;
s200: providing a pressure conducting elastic membrane, installing the pressure conducting elastic membrane in the shell, and enabling the pressure conducting elastic membrane to seal the bottom opening;
s300: providing a pressure detection PCB, installing the pressure detection PCB in the shell, enabling a cavity to exist between the pressure detection PCB and the pressure conduction elastic membrane, and enabling a detection end of the pressure detection PCB to extend into the cavity;
s400: providing a pressure conducting medium, and injecting the pressure conducting medium into a cavity between the pressure detection PCB and the pressure conducting elastic membrane.
2. The method of installing a detecting sensor for a washing machine according to claim 1, wherein the step S100 further comprises:
extending the periphery of the bottom of the shell towards the center direction of the bottom opening and forming an elastic membrane mounting part;
in step S200, the installing the pressure conducting elastic membrane in the housing specifically includes:
and connecting the periphery of the pressure conduction elastic membrane with the elastic membrane mounting part.
3. The detecting sensor mounting method for washing machine as claimed in claim 2,
the elastic membrane mounting part comprises a bearing platform, and the periphery of the bearing platform is curled towards the inside of the shell to form a fixed convex rib;
the connecting the periphery of the pressure conduction elastic membrane with the elastic membrane mounting part specifically comprises:
and attaching the inner surface of the fixed convex edge to the periphery of the pressure conducting elastic membrane.
4. The method of installing a detecting sensor for a washing machine according to claim 2 or 3, wherein in the step S200, further comprising: an elastic membrane pressing piece is further provided, and a clearance hole for avoiding the pressure conduction elastic membrane is formed in the middle of the elastic membrane pressing piece; the elastic membrane pressing member is installed in the housing such that a bottom surface of a periphery of the elastic membrane pressing member is pressed against a top surface of a periphery of the pressure conducting elastic membrane.
5. The detecting sensor mounting method of claim 4, wherein the step S100 further comprises:
arranging a pressing part mounting part at the bottom of the shell, and enabling the pressing part mounting part to be matched with the elastic membrane pressing part;
said mounting said elastomeric film compression member within said housing specifically comprises: and clamping the elastic membrane pressing piece in the pressing piece mounting part.
6. The installation method of the detecting sensor for the washing machine according to claim 2 or 3, wherein in the step S300, the pressure detecting PCB comprises a PCB fixing member and a detecting PCB; installing the pressure detection PCB in the shell specifically includes:
the detection PCB is partially clamped on the PCB fixing piece, and then the PCB fixing piece is installed in the shell.
7. The detecting sensor mounting method of claim 6, wherein said mounting said PCB board fixing member in said housing further comprises:
a fixing part support is further provided, the fixing part support comprises a support frame, and a plurality of support columns are arranged at the bottom of the support frame; in the step S300, the bottom of the supporting column is pressed on the elastic film pressing member, and then the upper surface of the supporting frame is contacted with the PCB fixing member.
8. The mounting method of the detecting sensor for the washing machine as claimed in claim 7, wherein the PCB board fixing member is provided with a plurality of medium guiding holes, and the bottom of each of the medium guiding holes is outwardly expanded to form a medium outwardly expanded groove; the step S400 specifically includes:
providing a pressure conducting medium;
and injecting the pressure conducting medium into the shell through the medium guide hole until the pressure conducting medium fills the cavity between the pressure detection PCB and the pressure conducting elastic membrane.
9. The method as claimed in claim 8, wherein in step S400, a silicone fixing member is further provided, the silicone fixing member is first disposed in the housing and is used to block the medium guiding holes, and then the silicone fixing member is connected to the detection PCB, and is used to cover a part of the detection PCB.
10. A detecting sensor for a washing machine, characterized in that the detecting sensor for a washing machine is installed by the method for installing a detecting sensor for a washing machine according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010480071.1A CN111593533A (en) | 2020-05-30 | 2020-05-30 | Method for installing detection sensor for washing machine and detection sensor for washing machine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010480071.1A CN111593533A (en) | 2020-05-30 | 2020-05-30 | Method for installing detection sensor for washing machine and detection sensor for washing machine |
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| CN111593533A true CN111593533A (en) | 2020-08-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010480071.1A Pending CN111593533A (en) | 2020-05-30 | 2020-05-30 | Method for installing detection sensor for washing machine and detection sensor for washing machine |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0768083A (en) * | 1993-09-01 | 1995-03-14 | Sharp Corp | Water level-detecting device for washing machine |
| CN202530301U (en) * | 2012-05-04 | 2012-11-14 | 合肥市宏键精工模具有限责任公司 | Direct insertion type water level sensor |
| CN107692944A (en) * | 2016-08-08 | 2018-02-16 | 迪尔阿扣基金两合公司 | Sensor device and the electrical equipment for being used to wash provided with the sensor device |
| CN108844595A (en) * | 2018-04-24 | 2018-11-20 | 胜利油田大源节能设备有限公司 | A kind of called putting-into-type liquid level meter |
| CN109706698A (en) * | 2019-02-27 | 2019-05-03 | 芜湖乐佳电器有限公司 | Water level sensor of washing machine |
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2020
- 2020-05-30 CN CN202010480071.1A patent/CN111593533A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0768083A (en) * | 1993-09-01 | 1995-03-14 | Sharp Corp | Water level-detecting device for washing machine |
| CN202530301U (en) * | 2012-05-04 | 2012-11-14 | 合肥市宏键精工模具有限责任公司 | Direct insertion type water level sensor |
| CN107692944A (en) * | 2016-08-08 | 2018-02-16 | 迪尔阿扣基金两合公司 | Sensor device and the electrical equipment for being used to wash provided with the sensor device |
| CN108844595A (en) * | 2018-04-24 | 2018-11-20 | 胜利油田大源节能设备有限公司 | A kind of called putting-into-type liquid level meter |
| CN109706698A (en) * | 2019-02-27 | 2019-05-03 | 芜湖乐佳电器有限公司 | Water level sensor of washing machine |
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