CN212645842U

CN212645842U - Detection sensor for washing machine

Info

Publication number: CN212645842U
Application number: CN202020959684.9U
Authority: CN
Inventors: 胡波清
Original assignee: Guangdong Lanshuihua Intelligent Electronic Co ltd
Current assignee: Guangdong Lanshuihua Intelligent Electronic Co ltd
Priority date: 2020-05-30
Filing date: 2020-05-30
Publication date: 2021-03-02
Anticipated expiration: 2030-05-30

Abstract

The utility model belongs to the technical field of washing machine sensor, especially, relate to a detection sensor for washing machine, including casing, pressure conduction elastic membrane, pressure conduction medium and pressure detection PCB board, the bottom of casing is equipped with the bottom opening, and pressure conduction elastic membrane installs in the casing and shutoff bottom opening, and pressure conduction medium holding is in the casing and is pressed and cover pressure conduction elastic membrane setting, and pressure detection PCB board install in the casing and press and cover pressure conduction medium setting, the sense terminal of pressure detection PCB board stretches into in the pressure conduction medium. The utility model discloses a will pressure conduction medium set up in pressure conduction elastic membrane with pressure detects between the PCB board, makes outside pressure earlier through pressure conduction elastic membrane, passes through pressure conduction medium again, and then the conduction extremely pressure detects the PCB board to realized the high-efficient conduction of pressure, and then improved pressure and detected the precision, detect the follow-up accurate control to washing machine according to pressure in order to realize, improve user experience.

Description

Detection sensor for washing machine

Technical Field

The utility model belongs to the technical field of washing machine sensor, especially, relate to a washing machine is with detecting sensor.

Background

The washing machine consists of mainly casing, washing and dewatering tub, transmission and control system, heating unit, etc. Washing machines are generally exclusively intended to use water as the main washing liquid, as opposed to the use of a specially prepared cleaning solution, and dry cleaning, which is usually carried out by a person skilled in the art.

The water level detection mechanism adopted by the washing machine on the market at present mostly transmits the pressure of water through a mechanical structure, and then converts the pressure information into water level height information after the pressure information is detected by an electric control device. However, the existing mechanical structure for detecting the water level has certain disadvantages, that is, the mechanical structure has poor pressure conduction effect due to the limitation of the hard structure of the mechanical structure when water pressure is conducted to the electric control device, so that the technical problem of inaccurate subsequent pressure detection is caused, and the precision of high detection of the water level is further reduced, thereby influencing the use of the washing machine. Therefore, it is necessary to design a detecting sensor for a washing machine.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a washing machine is with detecting sensor aims at solving among the prior art detecting sensor who uses among the washing machine and leads to pressure conduction effect not good because of structural design's limitation to and consequently lead to the inaccurate technical problem of pressure detection.

In order to achieve the above object, the embodiment of the utility model provides a detection sensor for washing machine, detect the PCB board including casing, pressure conduction elastic membrane, pressure conduction medium and pressure, the bottom of casing is equipped with the bottom opening, pressure conduction elastic membrane install in the casing and the shutoff bottom opening, pressure conduction medium holding in the casing and press and cover pressure conduction elastic membrane sets up, pressure detection PCB board install in the casing and press and cover pressure conduction medium sets up, the sense terminal of pressure detection PCB board stretches into in the pressure conduction medium to make external pressure pass through in proper order pressure conduction elastic membrane with behind the pressure conduction medium conduction extremely the sense terminal of pressure detection PCB board, and then make the pressure detection PCB board detects external pressure.

The embodiment of the utility model provides a washing machine has one of following technological effect with above-mentioned one or more technical scheme among the detection sensor at least: the utility model discloses a set up the casing, pressure conduction elastic membrane, pressure conduction medium and pressure detection PCB board, and make the pressure conduction medium holding in the casing, and make the pressure detection PCB board install in the casing and press and cover the setting of pressure conduction medium, and set up the sense terminal of pressure detection PCB board to stretch into in the pressure conduction medium, thus when detecting external pressure, external pressure can be in proper order through after pressure conduction elastic membrane and pressure conduction medium, the reconveying to the sense terminal of pressure detection PCB board, and then make the pressure detection PCB board detect external pressure, compare with prior art, this application makes external pressure pass through pressure conduction elastic membrane earlier through setting up the pressure conduction medium between pressure conduction elastic membrane and the pressure detection PCB board, and then the pressure intensity is transmitted to the pressure intensity detection PCB board through the pressure intensity transmission medium, and due to the elasticity of the pressure intensity transmission elastic membrane and the fluidity of the pressure intensity transmission medium, the high-efficiency, quick and low-loss transmission of the pressure intensity can be realized, so that the pressure intensity detection precision is improved, the follow-up accurate control of the washing machine according to the pressure intensity detection is realized, and the user experience is improved.

Drawings

The drawings in the following description are only some embodiments of the invention, and other drawings can be obtained by those skilled in the art without inventive exercise.

Fig. 1 is a schematic view of an overall structure 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 structure 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 structure view of 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 conducting 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 of 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 cross-sectional view of a pressure conductive elastic membrane of a detection sensor for a washing machine according to another embodiment of the present invention;

fig. 11 is a cross-sectional view of a pressure conductive elastic membrane of a detection sensor for a washing machine according to another embodiment of the present invention;

fig. 12 is a schematic cross-sectional view of a detection sensor for a washing machine according to another embodiment of the present invention;

fig. 13 is a schematic cross-sectional view of 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 a 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.

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 reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below by referring to the drawings are exemplary and intended to explain the embodiments of the present invention and are not to 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," and "fixed" are to be construed broadly, e.g., as fixed or detachable connections or as an integral part; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the embodiments of the present invention can be understood by those skilled in the art according to specific situations.

In an embodiment of the present invention, as shown in fig. 1 to 5, there is provided a detection sensor for a washing machine, including 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 seals the bottom opening 310, the pressure conducting medium 400 is accommodated in the housing 300 and is arranged to cover the pressure conducting elastic membrane 200, the pressure detecting PCB 500 is installed in the housing 300 and is arranged to cover 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 passing through the pressure conducting elastic membrane 200 and the pressure conducting medium 400 in sequence, and the pressure detecting PCB 500 detects the external pressure.

The utility model discloses a set up the casing 300, pressure conduction elastic membrane 200, pressure conduction medium 400 with pressure detection PCB board 500, and make pressure conduction medium 400 hold in the casing, and make pressure detection PCB board 500 install in casing 300 and press and cover pressure conduction medium 400 sets up, and will the sense terminal of pressure detection PCB board 500 sets up to stretch into in the pressure conduction medium 400 to when detecting external pressure, external pressure can be in proper order through behind pressure conduction elastic membrane 200 and pressure conduction medium 400, conduct again to the sense terminal of pressure detection PCB board 500, and then makes pressure detection PCB board 500 detect external pressure, compare with prior art, this application through with pressure conduction medium 400 set up in pressure conduction elastic membrane 200 with between pressure detection PCB board 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. 2 to 5, the periphery of the bottom of the housing 300 extends toward the center of the bottom opening 310 to form an elastic membrane mounting portion 330, and the periphery of the pressure conduction elastic membrane 200 is connected to the elastic membrane mounting portion 330. 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 blocks 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 the bottom opening is sealed 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, as shown in fig. 5, the elastic membrane mounting portion 330 includes a receiving platform 331, the periphery of the receiving platform 331 is curved into the housing 300 to form a fixed protruding rib 332, and the inner surface of the fixed protruding rib 332 is attached to the periphery of the pressure conduction elastic membrane 200. The upper surface of the receiving platform 331 is disposed in a plane, 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, as shown in fig. 2 to 4, the detection sensor for a washing machine further includes an elastic film pressing member 600, and the elastic film pressing member 600 is installed in the housing 300; the middle of the elastic membrane pressing piece 600 is provided with a clearance hole 610 for avoiding the pressure conduction elastic membrane 200, and the bottom surface of 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 bottom surface of the periphery of the pressure conduction elastic membrane 200 is attached to the bearing platform 331 and the fixing rib 332. The clearance hole 610 is used for not influencing the conduction of the pressure from the outside to the inside of the housing 300 along the pressure conduction elastic membrane 200. 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, as shown in fig. 2 and 4, the bottom of the housing 300 is provided with a pressing member mounting portion 340 matching with the elastic film pressing member 600, so that the elastic film pressing member 600 is engaged with the inside of the pressing member mounting portion 340. In this embodiment, the lateral wall of casing 300 bottom to inwards concave formation in the casing 300 compress tightly an installation department 340, compress tightly an installation department 340 with elasticity membrane pressure piece 600 phase-match sets up, so that external force will elasticity membrane pressure piece 600 install in when compressing tightly an installation department 340, elasticity membrane pressure 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 fixed bead 332 laminates.

In another embodiment of the present invention, the elastic film pressing member 600 comprises an annular pressing plate 620, the periphery of the annular pressing plate 620 is perpendicular to the direction of the annular pressing plate 620 extends to form a tight fitting column 630, the bottom surface of the tight fitting column 630 is abutted against the receiving platform 331, and the outside of the tight fitting column 630 is tightly fitted and connected with the inner surface of the pressing member mounting portion 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, as shown in fig. 6-7, a side of the pressure conducting elastic membrane 210 facing away from the pressure conducting medium 400 is extended and extended in a direction of the pressure conducting medium 400 to form a plurality of pressure conducting inner recesses 210.

The utility model discloses a set up pressure conduction elastic membrane 200, and make pressure conduction elastic membrane 200 deviates from a side of pressure conduction medium towards the direction extension of pressure conduction medium 400 and extension form a plurality of pressure conduction interior recess 210, thereby make washing machine is when using, and a plurality of the indent can be followed to the pressure of water pressure conduction interior recess 210 to the another side transmission of pressure conduction elastic membrane 200, promptly to the follow the casing is outward transmission in the casing 300, compared with planar membrane structure among the prior art, in this application interior recess 210 one side has the guide effect of preferred to the pressure conduction, and on the other hand has efficient pressure conduction effect to improve detection efficiency and rate of accuracy, have high practicality.

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 conduction inner recesses 210 having a ring shape is the same as the center of the pressure conduction 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 step-down manner from the outer edge of the pressure conduction elastic membrane 200 to the center direction 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 conducting elastic membrane 200 extends toward the opposite direction of the inner recess of the pressure conducting inner recess 210 and forms a middle outer protrusion 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. 6-7, the peripheral ring of the pressure conducting elastic membrane 200 is provided with a first convex close-fitting portion 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 to fix 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 peripheries of the two side surfaces of the pressure conduction elastic membrane 200 extend in the direction away from the pressure conduction elastic membrane 200 and respectively form a front convex close-fitting portion 241 and a back convex close-fitting portion 242; 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 periphery of one side of the pressure conduction elastic membrane 200 extends in a direction away from the pressure conduction elastic membrane 200 to form a single-sided convex tight fitting portion 250, and the other side of the pressure conduction elastic membrane 200 is in a planar arrangement. 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.

The utility model discloses a further embodiment, the material of pressure conduction elastic membrane 200 is silica gel, promptly pressure conduction elastic membrane 200 is made for having elastic silica gel, through adopting the silica gel material, makes pressure conduction elastic membrane 200 has splendid elasticity when pressure conduction elastic membrane 200 bears pressure, takes place elastic deformation rapidly, slows down the hindrance that brings for the pressure conduction in-process because of the rigid structure of detecting material itself in very big degree, and then guarantees efficient pressure conduction effect to the realization is to the accurate measurement of 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. 1-4, the pressure detecting PCB 500 comprises a PCB fixing member 510 and a detecting PCB 520, the detecting PCB is partially clamped on the PCB fixing member 510, and a portion of the detecting PCB 520 is immersed in the pressure conducting medium 400; the PCB fixing member 510 is installed in the housing 300, and the bottom of the PCB fixing member 510 is attached to the upper end surface of the pressure conducting medium 400. 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, as shown in fig. 2 to 4, the detection sensor for a washing machine further includes a fixing member support 530, the fixing member support 530 is erected on the elastic film pressing member 600, and the PCB board fixing member 510 is installed on the fixing member support 530. 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. 2-5, 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, as shown in fig. 12-13, the partial side wall of the middle portion of the housing 300 extends toward the outside of the housing 300 to form a fixing member mounting table 350, and the fixing member mounting table 350 is matched with the PCB fixing member 510 to enable the PCB fixing member 510 to be mounted on the fixing member 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.

In another embodiment of the present invention, as shown in fig. 2-5 and 12-13, the PCB fixing member 510 is provided with a plurality of medium guiding holes 511, and the bottom of each of the medium guiding holes 511 is outwardly expanded to form a medium outwardly expanded groove 512. 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, as shown in fig. 2-4, the detection sensor for washing machine further includes a silicone fixing member 700, the silicone fixing member 700 is disposed in the housing 300 and located above the detection PCB fixing member 510, the silicone fixing member 700 is further connected with and covers the detection PCB 520 to detect the local arrangement of the 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 effects of fixing the pressure conducting medium in the housing 300 and fixing the PCB fixing member 510 are achieved.

In another embodiment of the present invention, as shown in fig. 14-17, the detection PCB is provided with a detection circuit, 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.

The utility model discloses a set up interface circuit 110, voltage conversion circuit 120, master control circuit 130 and water pressure and temperature detection circuit 140, and make water pressure and temperature detection circuit 140 with voltage conversion circuit 120 with master control circuit 130 connects, thereby make water pressure and temperature detection circuit 140 detect reach the water pressure and the temperature of water pressure and temperature detection circuit 140 department and reach water pressure and temperature after the pressure conduction elastic membrane 200 conducts to pressure conduction medium 400 in proper order and pass detected water pressure and temperature information to master control circuit 130, so that master control circuit 130 passes water pressure and temperature information to washing machine main control board 180 through interface circuit 110, so, can realize the dual detection of temperature and water pressure through water pressure and temperature detection circuit 140, need not to set up a plurality of branch sensors, when reducing manufacturing cost, compare mechanical structure measurement temperature and water pressure, 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, 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 and the voltage converting circuit 120 are connected, the data transmission pin of the temperature detecting chip U3 and the data transmission pin of the main control chip U2 and the connection, the clock control pin of the temperature detecting chip U3 and the clock control pin of the main control chip U2 are connected. 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 conversion circuit 120 includes a voltage stabilizing chip U1, the input pin of the voltage stabilizing chip U1 is connected to the power supply output terminal of the main control board 180 of the washing machine, the output pin of the voltage stabilizing chip U1 is connected to the power supply pin of the main control chip U2 and the power supply pin of the water pressure and temperature detecting chip U3 respectively, and is the power supply of 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. 14-15, 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 voltage stabilizing 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 both 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 stabilization 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, the first pin of the connection port J4 is connected to the serial input pin of the main control chip U2, the third pin of the connection port J4 is connected to the serial output pin of the main control chip U2, the second pin of the connection port J4 is grounded, and the fourth pin of the connection port J4 is connected to the 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 used to detect the vibration information of the washing machine, and transmit the vibration information to the main control circuit 130, so that the main control circuit 130 transmits the vibration information to the main control board 180 of the washing machine through the interface circuit 110.

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. 16-17, the water pressure and temperature detecting circuit 140 includes a built-in detecting circuit 141 and an external detecting circuit 142, and both the built-in 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.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. A detection sensor for a washing machine is characterized by comprising a shell, a pressure conduction elastic membrane, a pressure conduction medium and a pressure detection PCB, wherein a bottom opening is formed in the bottom of the shell, the pressure conduction elastic membrane is installed in the shell and blocks the bottom opening, the pressure conduction medium is contained in the shell and is arranged to be pressed on the pressure conduction elastic membrane, the pressure detection PCB is installed in the shell and is arranged to be pressed on the pressure conduction medium, and a detection end of the pressure detection PCB extends into the pressure conduction medium, so that external pressure is transmitted to the detection end of the pressure detection PCB after sequentially passing through the pressure conduction elastic membrane and the pressure conduction medium, and the pressure detection PCB detects the external pressure.

2. The detecting sensor for washing machine as claimed in claim 1, wherein the bottom of the housing has a peripheral edge extending in a direction of a center of the bottom opening to form an elastic membrane mounting portion, and the peripheral edge of the pressure conductive elastic membrane is connected to the elastic membrane mounting portion.

3. The detecting sensor for washing machine as claimed in claim 2, wherein the elastic membrane mounting portion includes a receiving platform, a peripheral edge of the receiving platform is curled toward the inside of the housing to form a fixing rib, and an inner surface of the fixing rib is attached to a peripheral edge of the pressure conductive elastic membrane.

4. The detecting sensor for washing machine as claimed in claim 3, further comprising an elastic film pressing member installed in the housing; elastic membrane pressing piece middle part is equipped with keeps away the sky hole of keeping away of pressure conduction elastic membrane, the peripheral bottom surface pressure of elastic membrane pressing piece is located the peripheral top surface of pressure conduction elastic membrane, so that the peripheral bottom surface of pressure conduction elastic membrane with accept the platform with fixed bead laminating.

5. The detecting sensor for washing machine as claimed in claim 4, wherein the bottom of the housing is provided with a pressing member mounting portion to be fitted with the elastic film pressing member so that the elastic film pressing member is engaged with the pressing member mounting portion.

6. The detecting sensor for the washing machine as claimed in claim 5, wherein the elastic film pressing member includes an annular pressing plate, a peripheral edge of the annular pressing plate extends in a direction perpendicular to the annular pressing plate to form a tight fitting column, a bottom surface of the tight fitting column abuts against the receiving platform, and an outer side of the tight fitting column is tightly fitted and connected with an inner surface of the pressing member mounting portion.

7. The detecting sensor for washing machine as claimed in claim 6, wherein the peripheral ring of the pressure conducting elastic membrane is provided with a first protruding fitting portion, and two sides of the first protruding fitting portion are respectively attached to the annular pressing plate and the receiving platform.

8. The detecting sensor for washing machine as claimed in claim 7, wherein the side of the pressure conducting elastic membrane facing away from the pressure conducting medium is expanded in the direction of the pressure conducting medium and extended to form a plurality of pressure conducting concave parts.

9. The detecting sensor for washing machine as claimed in any one of claims 2-8, wherein the pressure conducting elastic membrane is made of silicone.

10. The detecting sensor for washing machine as claimed in any one of claims 4-8, wherein the pressure detecting PCB comprises a PCB fixing member and a detecting PCB, the detecting PCB is partially clamped on the PCB fixing member, and the detecting PCB is partially immersed in the pressure conducting medium; the PCB fixing piece is arranged in the shell, and the bottom of the PCB fixing piece is attached to the upper end face of the pressure conducting medium.

11. The detecting sensor for washing machine as claimed in claim 10, further comprising a fixing member bracket mounted on the elastic film pressing member, wherein the PCB board fixing member is mounted on the fixing member bracket.

12. The detecting sensor for washing machine as claimed in claim 11, wherein the fixing member support includes a support frame having a plurality of support posts provided at a bottom thereof; the upper surface of carriage with PCB board mounting contact, the bottom pressure of support column is located on the elastic membrane clamping piece.

13. The detecting sensor for washing machine as claimed in claim 10, wherein a partial side wall of the middle portion of the housing extends in a direction of the outside of the housing to form a fixing member mounting table, and the fixing member mounting table is disposed to match with the PCB fixing member so that the PCB fixing member is mounted on the fixing member mounting table.

14. The detecting sensor for washing machine as claimed in claim 13, wherein the PCB board fixing member is provided with a plurality of medium guiding holes, and a bottom of each of the medium guiding holes is outwardly expanded to form a medium outwardly expanded groove.

15. The detecting sensor for washing machine as claimed in any one of claims 2-8, further comprising a silicone fixing member, wherein the silicone fixing member is disposed in the housing and above the detecting PCB fixing member, and the silicone fixing member is further connected to the detecting PCB and covers a part of the detecting PCB.

16. The detecting sensor for washing machine as claimed in any one of claims 2-8, wherein the detecting PCB board is provided with a detecting circuit, the detecting circuit comprises:

the interface circuit is connected with a washing machine main control board of the washing machine;

a voltage conversion circuit connected to the interface circuit;

the master control circuit is connected with the voltage conversion circuit and the interface circuit;

and the pressure and temperature detection circuit is connected with the voltage conversion circuit and the main control circuit and is used for detecting pressure and temperature information in the washing machine and transmitting the detected pressure and temperature information to the main control circuit, so that the main control circuit transmits the pressure and temperature information to the washing machine main control board through the interface circuit.

17. The detecting sensor for washing machine as claimed in claim 16, wherein the pressure and temperature detecting circuit comprises a built-in detecting circuit and an external detecting circuit, both of which are connected to the main control circuit; the built-in detection circuit is used for detecting the pressure inside a water containing barrel of the washing machine, and the external detection circuit is used for detecting the atmospheric pressure outside the water containing barrel of the washing machine.

18. The detecting sensor for washing machine as claimed in claim 16, wherein the detecting circuit further comprises a vibration detecting circuit, the vibration detecting circuit is connected to the main control circuit and the voltage converting circuit, the vibration detecting circuit is used for detecting vibration information of the washing machine and transmitting the vibration information to the main control circuit, and the main control circuit transmits the vibration information to the main control board of the washing machine through the interface circuit.

19. The detecting sensor for washing machine as claimed in any one of claims 2 to 8, wherein the pressure conducting medium is made of silicone oil.

20. The detecting sensor for washing machine as claimed in any one of claims 2 to 8, wherein the casing is made of stainless steel.