A detection sensor for washing machine

Abstract

The present invention belongs to the technical field of washing machine sensors, and in particular, relates to a detection sensor for a washing machine, comprising a housing, a pressure-conducting elastic membrane, a pressure-conducting medium, and a pressure-detecting PCB board, wherein a bottom opening is provided at the bottom of the housing, the pressure-conducting elastic membrane is installed in the housing and seals the bottom opening, the pressure-conducting medium is contained in the housing and covers the pressure-conducting elastic membrane, the pressure-detecting PCB board is installed in the housing and covers the pressure-conducting medium, and the detection end of the pressure-detecting PCB board extends into the pressure-conducting medium. The present invention arranges the pressure-conducting medium between the pressure-conducting elastic membrane and the pressure-detecting PCB board, so that the external pressure first passes through the pressure-conducting elastic membrane, then passes through the pressure-conducting medium, and then is transmitted to the pressure-detecting PCB board, thereby realizing efficient pressure transmission, thereby improving the pressure detection accuracy, so as to realize subsequent precise control of the washing machine according to the pressure detection, and improve the user experience.

Description

Technical Field

[0001] The invention belongs to the technical field of washing machine sensors, and in particular relates to a detection sensor for a washing machine. Background Art

[0002] Washing machines are mainly composed of a cabinet, a washing and dehydrating barrel (some have separate washing and dehydrating barrels), a transmission and control system, and some are also equipped with a heating device. Washing machines generally refer to machines that use water as the main cleaning liquid, which is different from dry cleaning, which uses special cleaning solutions and is usually done by a dedicated person.

[0003] The water level detection mechanism used by washing machines on the market currently mostly conducts water pressure through a mechanical structure, and then converts the pressure information into water level information after the pressure information is detected by the electronic control device. However, the mechanical structures currently used to detect water levels all have certain disadvantages, that is, the mechanical structure has a poor pressure transmission effect when transmitting water pressure to the electronic control device due to the limitations of its own rigid structure. This leads to technical problems such as inaccurate subsequent pressure detection, and even reduces the accuracy of water level detection, thereby affecting the use of washing machines. Therefore, it is necessary to design a detection sensor for washing machines. Summary of the invention

[0004] The object of the present invention is to provide a detection sensor for a washing machine, aiming to solve the technical problem that the detection sensors used in washing machines in the prior art have poor pressure conduction effect due to the limitations of the structural design, and thus lead to inaccurate pressure detection.

[0005] To achieve the above-mentioned purpose, an embodiment of the present invention provides a detection sensor for a washing machine, comprising a shell, a pressure-conducting elastic membrane, a pressure-conducting medium and a pressure-detecting PCB board, wherein a bottom opening is provided at the bottom of the shell, the pressure-conducting elastic membrane is installed in the shell and seals the bottom opening, the pressure-conducting medium is accommodated in the shell and covers the pressure-conducting elastic membrane, the pressure-detecting PCB board is installed in the shell and covers the pressure-conducting medium, and a detection end of the pressure-detecting PCB board extends into the pressure-conducting medium, so that the external pressure is sequentially transmitted through the pressure-conducting elastic membrane and the pressure-conducting medium to the detection end of the pressure-detecting PCB board, thereby enabling the pressure-detecting PCB board to detect the external pressure.

[0006] The above one or more technical solutions in the detection sensor for washing machines provided by the embodiment of the present invention have at least one of the following technical effects: the present invention arranges the shell, the pressure-conducting elastic membrane, the pressure-conducting medium and the pressure-detecting PCB board, and the pressure-conducting medium is accommodated in the shell, and the pressure-detecting PCB board is installed in the shell and covers the pressure-conducting medium, and the detection end of the pressure-detecting PCB board is arranged to extend into the pressure-conducting medium, so that when detecting the external pressure, the external pressure can pass through the pressure-conducting elastic membrane and the pressure-conducting medium in sequence, and then The pressure is transmitted to the detection end of the pressure detection PCB board, so that the pressure detection PCB board detects the external pressure. Compared with the prior art, the present application sets the pressure transmission medium between the pressure transmission elastic membrane and the pressure detection PCB board, so that the external pressure first passes through the pressure transmission elastic membrane, then passes through the pressure transmission medium, and then is transmitted to the pressure detection PCB board. Due to the elasticity of the pressure transmission elastic membrane and the fluidity of the pressure transmission medium, the pressure can be efficiently, quickly and with low loss transmitted, thereby improving the pressure detection accuracy, so as to realize the subsequent precise control of the washing machine according to the pressure detection, and improve the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] The drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0008] Figure 1 A schematic diagram of the overall structure of a detection sensor for a washing machine provided by an embodiment of the present invention;

[0009] Figure 2 An exploded diagram of a detection sensor for a washing machine provided by an embodiment of the present invention;

[0010] Figure 3 A schematic cross-sectional structure diagram of a detection sensor for a washing machine provided by an embodiment of the present invention;

[0011] Figure 4 for Figure 3 Another perspective structural diagram of;

[0012] Figure 5 A schematic cross-sectional structure diagram of a housing of a detection sensor for a washing machine provided by an embodiment of the present invention;

[0013] Figure 6 A schematic diagram of the overall structure of a pressure-conducting elastic membrane of a detection sensor for a washing machine provided by an embodiment of the present invention;

[0014] Figure 7 for Figure 6Another perspective structural diagram of the pressure-conducting elastic membrane of the detection sensor for the washing machine;

[0015] Figure 8 A schematic diagram of the overall structure of a pressure-conducting elastic membrane of a detection sensor for a washing machine provided by another embodiment of the present invention;

[0016] Fig. 9 for Figure 8 A schematic cross-sectional view of a pressure-conducting elastic membrane of a detection sensor for a washing machine;

[0017] Fig.10 A cross-sectional view of a pressure-conducting elastic membrane of a detection sensor for a washing machine provided by another embodiment of the present invention;

[0018] Fig.11 A cross-sectional view of a pressure-conducting elastic membrane of a detection sensor for a washing machine provided by another embodiment of the present invention;

[0019] Fig.12 A schematic cross-sectional structure diagram of a detection sensor for a washing machine provided by another embodiment of the present invention;

[0020] Fig.13 A schematic cross-sectional structure diagram of a housing of a detection sensor for a washing machine provided by another embodiment of the present invention;

[0021] Fig.14 A circuit schematic diagram of a detection circuit of a detection sensor for a washing machine provided by an embodiment of the present invention;

[0022] Fig.15 A circuit block diagram of a detection circuit of a detection sensor for a washing machine provided by an embodiment of the present invention;

[0023] Fig.16 A circuit schematic diagram of a water pressure and temperature detection circuit of a detection circuit provided by another embodiment of the present invention;

[0024] Fig.17 A circuit block diagram of a detection circuit of a detection sensor for a washing machine provided in another embodiment of the present invention.

[0025] Among them, the reference numerals in the figure are:

[0026] Detection circuit 100, interface circuit 110, voltage conversion circuit 120, input protection circuit 121, main control circuit 130, water pressure and temperature detection circuit 140, built-in detection circuit 141, external detection circuit 142, vibration detection circuit 150, washing machine main control board 180, pressure-conducting elastic membrane 200, pressure-conducting inner concave portion 210, middle outer convex portion 220, first convex tight-fitting portion 230, front convex tight-fitting portion 241, back convex tight-fitting portion 242, single-side convex tight-fitting portion 250, shell 300, bottom opening 3 10, upper opening 320, elastic membrane mounting portion 330, receiving platform 331, fixing ridge 332, clamping member mounting portion 340, fixing member mounting platform 350, pressure conducting medium 400, pressure detection PCB board 500, PCB board fixing member 510, medium guide hole 511, medium outer expansion groove 512, detection PCB board 520, fixing member bracket 530, support frame 531, support column 532, elastic membrane clamping member 600, air avoidance hole 610, annular pressing plate 620, tight fitting column 630, silicone fixing member 700. DETAILED DESCRIPTION

[0027] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the embodiments of the present invention, and should not be construed as limiting the present invention.

[0028] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0029] In the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0030] In one embodiment of the present invention, Figure 1-Figure 5As shown, a detection sensor for a washing machine is provided, which includes a housing 300 , a pressure-conducting elastic membrane 200 , a pressure-conducting medium 400 and a pressure-detecting PCB board 500 .

[0031] The bottom of the housing 300 is provided with a bottom opening 310, and the top of the housing 300 is provided with an upper opening 320. The pressure-conducting elastic membrane 200, the pressure-conducting medium 400, and the pressure-detecting PCB board 500 are sequentially installed in the housing 300 from the upper opening 320. After the pressure-conducting elastic membrane 200 is installed in the housing 300, the bottom opening 310 is sealed. The pressure-conducting medium 400 is accommodated in the housing 300 and covers the pressure-conducting elastic membrane 200. The pressure-detecting PCB board 500 is installed in the housing 300 and covers the pressure-conducting medium 400. The detection end of the pressure-detecting PCB board 500 extends into the pressure-conducting medium 400, so that the external pressure is sequentially transmitted through the pressure-conducting elastic membrane 200 and the pressure-conducting medium 400 to the detection end of the pressure-detecting PCB board 500, so that the pressure-detecting PCB board 500 detects the external pressure.

[0032] The present invention sets the shell 300, the pressure-conducting elastic membrane 200, the pressure-conducting medium 400 and the pressure-detecting PCB board 500, and the pressure-conducting medium 400 is accommodated in the shell, and the pressure-detecting PCB board 500 is installed in the shell 300 and covers the pressure-conducting medium 400, and the detection end of the pressure-detecting PCB board 500 is set to extend into the pressure-conducting medium 400, so that when detecting external pressure, the external pressure can be sequentially transmitted through the pressure-conducting elastic membrane 200 and the pressure-conducting medium 400, and then transmitted to the detection end of the pressure-detecting PCB board 500. end, thereby enabling the pressure detection PCB board 500 to detect the external pressure. Compared with the prior art, the present application sets the pressure conduction medium 400 between the pressure conduction elastic membrane 200 and the pressure detection PCB board 500, so that the external pressure first passes through the pressure conduction elastic membrane 200, then passes through the pressure conduction medium 400, and then is transmitted to the pressure detection PCB board 500. Due to the elasticity of the pressure conduction elastic membrane 200 and the fluidity of the pressure conduction medium 400, the pressure can be efficiently, quickly and with low loss transmitted, thereby improving the pressure detection accuracy, so as to realize the subsequent precise control of the washing machine according to the pressure detection, and improve the user experience.

[0033] In another embodiment of the present invention, Figure 2-Figure 5As shown, the periphery of the bottom of the housing 300 extends toward the center direction of the bottom opening 310 to form an elastic film mounting portion 330, and the periphery of the pressure-conducting elastic membrane 200 is connected to the elastic film mounting portion 330. The elastic film mounting portion 330 is used to conveniently mount the pressure-conducting elastic membrane 200. After installation, the bottom surface of the periphery of the pressure-conducting elastic membrane 200 contacts the top surface of the elastic film mounting portion 330 and the two are tightly connected by external force, so as to achieve the purpose of sealing the bottom opening 310 by the pressure-conducting elastic membrane 200. At the same time, due to the elastic setting of the pressure-conducting elastic membrane 200, when the pressure-conducting elastic membrane 200 is tightly connected to the elastic film mounting portion 330 by external force, the periphery of the pressure-conducting elastic membrane 200 will undergo elastic deformation, so that under the action of external force, on the one hand, the two are tightly connected, and on the other hand, the sealing of the pressure-conducting elastic membrane 200 after sealing the bottom opening is ensured, so as to achieve the dual functions of connection and sealing. Specifically, the external force in this embodiment can be selected by ordinary technicians in this field according to actual needs by using an adhesive such as glue or a pressing member to press the pressure-conducting elastic membrane 200 to the elastic membrane mounting portion 330, so as to utilize the adhesion or pressing force of the glue to connect the periphery of the pressure-conducting elastic membrane 200 with the elastic membrane mounting portion 330.

[0034] In another embodiment of the present invention, Figure 5 As shown, the elastic membrane mounting portion 330 includes a receiving platform 331, the periphery of the receiving platform 331 is curled into the housing 300 to form a fixed ridge 332, and the inner surface of the fixed ridge 332 is in contact with the periphery of the pressure-conducting elastic membrane 200. The upper surface of the receiving platform 331 is arranged in a planar shape, and when installing the pressure-conducting elastic membrane 200, the pressure-conducting elastic membrane 200 is directly placed on the receiving platform 331 so that the bottom surface of the periphery of the pressure-conducting elastic membrane 200 is in contact with the upper end surface of the receiving platform 331, and then the two are pressed together using external force. After pressing, the inner surface of the fixed ridge 332 fits with the periphery of the pressure-conducting elastic membrane 200, so that not only the upper end surface of the receiving platform 331 contacts the part of the pressure-conducting elastic membrane 200 where elastic deformation occurs, but also the inner surface of the fixed ridge of the pressure-conducting elastic membrane 200 contacts, thereby increasing the contact area between the pressure-conducting elastic membrane 200 and the elastic membrane mounting portion 330, thereby improving the sealing performance by simultaneously and closely contacting two parts.

[0035] In another embodiment of the present invention, Figure 2-Figure 4As shown, the detection sensor for washing machine further includes an elastic film pressing member 600, and the elastic film pressing member 600 is installed in the housing 300; a hole 610 is provided in the middle of the elastic film pressing member 600 for avoiding the pressure-conducting elastic film 200, and the bottom surface of the periphery of the elastic film pressing member 600 is pressed against the top surface of the periphery of the pressure-conducting elastic film 200, so that the bottom surface of the periphery of the pressure-conducting elastic film 200 is in contact with the receiving platform 331 and the fixing ridge 332. The hole 610 is used to prevent the pressure from being transmitted from the outer edge of the pressure-conducting elastic film 200 to the inside of the housing 300. The periphery of the elastic membrane clamping piece 600 is pressed onto the top surface of the periphery of the pressure-conducting elastic membrane 200, so that the pressure-conducting elastic membrane 200 and the elastic membrane clamping piece 600 are in contact only at the periphery, thereby ensuring that the pressure-conducting elastic membrane 200 is fixed without affecting the pressure-conducting elastic membrane 200's function of conducting pressure. The structural design is ingenious, and after pressing, the bottom surface of the periphery of the pressure-conducting elastic membrane 200 is also in contact with the receiving platform 331 and the fixing ridge 332, thereby ensuring the sealing.

[0036] In another embodiment of the present invention, Figure 2 and Figure 4 As shown, the bottom of the housing 300 is provided with a pressing member installation portion 340 matching the elastic film pressing member 600, so that the elastic film pressing member 600 is engaged in the pressing member installation portion 340. In this embodiment, the side wall of the bottom of the housing 300 is concave inwardly of the housing 300 to form the pressing member installation portion 340, and the pressing member installation portion 340 is matched with the elastic film pressing member 600, so that when the elastic film pressing member 600 is installed in the pressing member installation portion 340 by external force, the elastic mold pressing member 600 is just engaged in the housing 300 and fixes the pressure-conducting elastic membrane 200, so that the pressure-conducting elastic membrane 200 undergoes elastic deformation and the bottom surface and side surface of the peripheral edge thereof are respectively in contact with the receiving platform 331 and the fixing convex ridge 332.

[0037] In another embodiment of the present invention, the elastic film clamping member 600 includes 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 abuts against the receiving platform 331, and the outer side of the tight-fitting column 630 is tightly connected to the inner surface of the clamping member mounting portion 340. In this embodiment, the area and shape of the annular pressing plate 620 are matched with the area and shape of the periphery of the pressure-conducting elastic film 200, so that the annular pressing plate 620 is just pressed against the periphery of the pressure-conducting elastic film 200, thereby ensuring that the pressure-conducting elastic film 200 is not affected when the pressure-conducting elastic film 200 is fixed. In addition, the bottom surface of the tight-fitting column 630 is arranged to abut against the receiving platform 331, and the outer side of the tight-fitting column 630 is arranged to be tightly connected with the inner surface of the clamping member mounting portion 340, so that while the elastic membrane clamping member 600 can be installed, the possibility of other external objects or liquids penetrating into the interior of the shell can also be blocked, thereby further improving the sealing performance.

[0038] In another embodiment of the present invention, Figure 6-Figure 7 As shown, the side of the pressure-conducting elastic membrane 210 facing away from the pressure-conducting medium 400 expands and extends in the direction of the pressure-conducting medium 400 to form a plurality of pressure-conducting inner recesses 210 .

[0039] The present invention sets a pressure-conducting elastic membrane 200, and expands and extends the side of the pressure-conducting elastic membrane 200 away from the pressure-conducting medium in the direction of the pressure-conducting medium 400 to form a plurality of pressure-conducting inner recesses 210, so that when the detection sensor for the washing machine of the present invention is in use, the water pressure can be transmitted along the plurality of concave pressure-conducting inner recesses 210 to the other side of the pressure-conducting elastic membrane 200, that is, from the outside of the shell to the inside of the shell 300. Compared with the planar membrane structure in the prior art, the pressure-conducting inner recesses 210 in the present application have a better guiding effect on pressure conduction on the one hand, and have a high-efficiency pressure conduction effect on the other hand, thereby improving the detection efficiency and accuracy, and having extremely high practicality.

[0040] In another embodiment of the present invention, Figure 8As shown, each of the pressure-conducting inner recesses 210 is arranged in a ring shape. When the detection sensor for the washing machine described in the present application is in use, one side of the pressure-conducting elastic membrane 200 bears the pressure of the water in the washing machine water tub, and the pressure is transmitted to the other side of the pressure-conducting elastic membrane 200 through the pressure-conducting elastic membrane 200 and then transmitted to the inside of the shell 300. That is, when there is water in the washing machine water tub, the water pressure acts on each of the pressure-conducting inner recesses 210. By setting the pressure-conducting inner recesses 210 in a ring shape, the pressure is transmitted along the ring shape of the pressure-conducting inner recesses 210 to the other side of the pressure-conducting elastic membrane 200 during pressure transmission, thereby better transmitting the pressure brought by the water, thereby ensuring the accuracy of subsequent pressure measurement. In this embodiment, each of the pressure-conducting inner recesses 210 is arranged in a circular ring shape. In this embodiment, the number of the pressure-conducting inner recesses 210 is one.

[0041] In another embodiment of the present invention, Figure 6-Figure 7 As shown, the annular pressure-conducting inner recesses 210 are arranged at equal intervals. In this way, when the water pressure acts on the pressure-conducting inner recesses 210, it can be evenly conducted along the pressure-conducting inner recesses 210 into the shell to ensure a high pressure conduction effect. In this embodiment, the number of the pressure-conducting inner recesses 210 is two.

[0042] In another embodiment of the present invention, the center of each of the annular pressure-transmitting recessed portions 210 is the same as the center of the pressure-transmitting elastic membrane 200. That is, the center of each of the annular pressure-transmitting recessed portions 210 is the center of the pressure-transmitting elastic membrane 200, thereby ensuring the stability of the overall structure of the pressure-transmitting elastic membrane 200, so as to better withstand the water pressure and increase the service life.

[0043] In another embodiment of the present invention, Figure 6-Figure 9As shown, each of the pressure-conducting inner concave portions 210 is arranged in a step-down manner from the outer edge of the pressure-conducting elastic membrane 200 to the center direction of the pressure-conducting elastic membrane 200. That is, from the outer edge of the pressure-conducting elastic membrane 200 to the center direction of the pressure-conducting elastic membrane, the degree of concavity of each of the pressure-conducting inner concave portions 210 decreases in sequence, which can also be understood as that the inner concave surface of the pressure-conducting inner concave portion 210 beside the center of the pressure-conducting elastic membrane 200 is the lowest surface of the inner concave surface of each of the pressure-conducting inner concave portions 210. Compared with the planar structure in the prior art, by arranging each of the pressure-conducting inner concave portions 210 in a step-down manner, the pressure can be transmitted step by step along each of the pressure-conducting inner concave portions 210 during pressure conduction, thereby improving the pressure conduction efficiency. On the other hand, the pressure-conducting elastic membrane 200 as a whole is in a shape in which one side is concave toward the other side. When the pressure-conducting elastic membrane 200 contacts water, each of the pressure-conducting inner recesses 210 has a diversion effect. During the diversion process, the water pressure also acts on each of the pressure-conducting inner recesses 210 along with the diversion effect, and is then transmitted to the other side of the pressure-conducting elastic membrane 200, thereby realizing pressure conduction.

[0044] In another embodiment of the present invention, Figure 8 As shown, the middle of the pressure-conducting elastic membrane 200 extends in the opposite direction of the inner concave portion 210 of the pressure-conducting inner concave portion 210 and forms a middle outer convex portion 220. That is, the overall structure of the pressure-conducting elastic membrane 200 is not arranged with one side inclined to the other side, but the middle outer convex portion 220 is convexly arranged in the middle in the opposite direction of the inner concave portion 210 of each pressure-conducting inner concave portion 210, so that when the water pressure acts on each pressure-conducting inner concave portion 210, the middle outer convex portion 220 provides an elastic force, thereby ensuring the stability of the structure of the pressure-conducting elastic membrane 200 when the two sides are subjected to force, thereby ensuring that the pressure-conducting elastic membrane 200 will not be deformed due to continuous force, thereby improving the stability of the overall structure of the elastic membrane. Specifically, the elastic force provided by the middle outer convex portion 220 is a force that diffuses from the middle outer convex portion 220 to each pressure-conducting inner concave portion 210 toward the circumference of the pressure-conducting elastic membrane 200.

[0045] In another embodiment of the present invention, Figure 6-Figure 7 As shown, the periphery of the pressure-conducting elastic membrane 200 is provided with a first protruding tight-fitting portion 230. In this embodiment, the first protruding tight-fitting portion 230 is provided in a circular ring shape, and when the first protruding tight-fitting portion 230 is used to fix the pressure-conducting elastic membrane 200, the elastic membrane pressing member presses the first protruding tight-fitting portion 230 to seal the bottom opening 310.

[0046] In another embodiment of the present invention, Fig.10As shown, the peripheries of the two side surfaces of the pressure-conducting elastic membrane 200 extend in a direction away from the pressure-conducting elastic membrane 200 and respectively form a front convex tight-fitting portion 241 and a back convex tight-fitting portion 242; the front convex tight-fitting portion 241 and the back convex tight-fitting portion 242 are symmetrically arranged. In this embodiment, the front convex tight-fitting portion 241 and the back convex tight-fitting portion 242 are arranged in a convex shape, and the front convex tight-fitting portion 241 and the back convex tight-fitting portion 242 are both arranged elastically, so that when the pressure-conducting elastic membrane 200 is fixed, the front convex tight-fitting portion 241 and the back convex tight-fitting portion 242 are pressed, so that the convex portions of the front convex tight-fitting portion 241 and the back convex tight-fitting portion 242 are elastically deformed, thereby ensuring sealing.

[0047] In another embodiment of the present invention, Fig.11 As shown, the periphery of one side of the pressure-conducting elastic membrane 200 extends in a direction away from the pressure-conducting elastic membrane 200 and forms a single-sided raised tight-fitting portion 250, and the other side of the pressure-conducting elastic membrane 200 is arranged in a plane. Specifically, the pressure-conducting elastic membrane 200 with a plane on one side is convenient for tightly fitting with the receiving platform 331, and the single-sided raised tight-fitting portion 250 is arranged on the other side so that the elastic membrane pressing member 600 is pressed on the single-sided raised tight-fitting portion 250 to cause elastic deformation to maintain the sealing during installation. In this way, the convenience and sealing of the installation are achieved through the different settings on both sides, which is efficient and fast.

[0048] In another embodiment of the present invention, the material of the pressure-conducting elastic membrane 200 is silicone, that is, the pressure-conducting elastic membrane 200 is made of elastic silicone. By using silicone material, the pressure-conducting elastic membrane 200 has excellent elasticity. When the pressure-conducting elastic membrane 200 is subjected to pressure, elastic deformation occurs rapidly, which greatly reduces the obstacles caused by the hard structure of the detection material itself to the pressure conduction process, thereby ensuring an efficient pressure conduction effect, thereby achieving accurate measurement of pressure. Of course, the material of the pressure-conducting elastic membrane 200 can also be selected as other materials, as long as it can meet the above-mentioned pressure conduction requirements of the pressure-conducting elastic membrane 200, and this application does not make specific limitations on this.

[0049] In addition, the pressure-conducting elastic membrane 200 described in the present application is an integrated molding setting, thus ensuring high efficiency in the production process. The integrated molding setting allows the pressure-conducting elastic membrane 200 to remain as a whole, with a more stable structure, which indirectly increases the service life of the pressure-conducting elastic membrane 200 to provide users with a higher user experience.

[0050] In another embodiment of the present invention, the material of the pressure conducting medium 400 is silicone oil. Silicone oil has heat resistance, electrical insulation, weather resistance, hydrophobicity, physiological inertness and low surface tension, and also has a low viscosity-temperature coefficient and high compression resistance. On the one hand, because silicone oil has compression resistance, it can efficiently conduct the pressure conducted through the pressure conducting elastic membrane 200, and then conduct it to the pressure detection PCB board 500 to improve the pressure conduction efficiency. On the other hand, silicone oil is also an excellent heat transfer oil. By setting the silicone oil as the pressure conducting medium 400, it can efficiently transmit water temperature, so that the pressure detection PCB board 500 can detect the temperature of the water in the water tub in the washing machine. In addition, the electrical insulation of silicone oil allows the detection end of the pressure detection PCB board 500 to be immersed in it for a long time without damaging the circuit structure on the pressure detection PCB board 500, thereby ensuring that the service life and service life of the pressure detection PCB board 500 are not affected.

[0051] In another embodiment of the present invention, the shell 300 is made of stainless steel. During production, the shell 300 is made of stainless steel after stretching. Since the processing technology of stainless steel in the prior art has become increasingly mature, the mature technology on the market can be used to manufacture the shell 300 to reduce the research and development cost. The shell 300 made of stainless steel has a certain strength, which can ensure the stability of the overall structure of the detection sensor for the washing machine. In addition, the shell 300 made of stainless steel also has extremely strong thermal conductivity, thereby ensuring efficient heat conduction when detecting water temperature.

[0052] In another embodiment of the present invention, Figure 1-Figure 4As shown, the pressure detection PCB board 500 includes a PCB board fixing part 510 and a detection PCB board 520, the detection PCB board is partially clamped on the PCB board fixing part 510, and the detection PCB board 520 is partially immersed in the pressure conductive medium 400; the PCB board fixing part 510 is installed in the housing 300, and the bottom of the PCB board fixing part 510 is in contact with the upper end surface of the pressure conductive medium 400. In this embodiment, the PCB board fixing part 510 is made of rubber material, and the connection between the PCB board fixing part 510 and the detection PCB board 520 is achieved by low-temperature injection molding. After the bottom of the PCB board fixing part 510 is fitted with the upper end surface of the pressure conducting medium 400, the cavity between the PCB board fixing part 510 and the pressure conducting elastic membrane 200 is filled with the pressure conducting medium 400 without any excess liquid or gas, thereby ensuring that the external pressure is first transmitted through the pressure conducting elastic membrane 200 and then through the pressure conducting medium 400 to the detection PCB board 520, avoiding the influence of the pressure transmission on the pressure due to the excess material in the pressure conducting medium 400, thereby ensuring the high efficiency and accuracy of the pressure transmission to the detection PCB board 520, thereby improving the pressure detection accuracy.

[0053] In another embodiment of the present invention, Figure 2-Figure 4 As shown, the detection sensor for washing machine further includes a fixing bracket 530, and the fixing bracket 530 is mounted on the elastic film pressing member 600, and the PCB board fixing member 510 is installed on the fixing bracket 530. The fixing bracket 530 is used to fix the PCB board fixing member 510. At the same time, after the PCB board fixing member 510 is installed on the fixing bracket 530, the pressure applied by the PCB board fixing member 510 to the fixing bracket 530 and the gravity of the fixing bracket 530 both fall on the elastic film pressing member 200, so that the elastic film pressing member 600 is pressed while the PCB board fixing member 510 is fixed, which has extremely high practicality.

[0054] In another embodiment of the present invention, Figure 2-Figure 5As shown, the fixing bracket 530 includes a support frame 531, and a plurality of support columns 532 are provided at the bottom of the support frame 531; the upper surface of the support frame 531 contacts the PCB board fixing member 510, and the bottom of the support column 532 is pressed on the elastic film pressing member 600. In this embodiment, the support frame 531 is arranged in a flat plate shape, and the upper surface of the flat plate-shaped support frame 531 contacts and fits with the PCB board fixing member 510 to improve the relative stability of the two. The support columns 531 are also arranged at equal intervals to ensure the overall force balance of the fixing bracket 530. In addition, each of the support columns 532 is arranged in a columnar shape and cooperates with the flat support frame 531, so that while ensuring the supporting function, the volume occupied by the fixing bracket 530 in the cavity between the PCB fixing component 510 and the pressure-conducting elastic membrane 200 is reduced, so as to ensure that the pressure-conducting medium 400 occupies a larger volume in the cavity between the PCB fixing component 510 and the pressure-conducting elastic membrane 200, thereby ensuring the high efficiency and stability of the internal and external pressure conduction.

[0055] In another embodiment of the present invention, Figure 12-13 As shown, the partial side wall of the middle part of the housing 300 extends toward the outside of the housing 300 to form a fixing member mounting platform 350, and the fixing member mounting platform 350 is matched with the PCB board fixing member 510 so that the PCB board fixing member 510 is mounted on the fixing member mounting platform 510. In this embodiment, when the PCB board fixing member 510 is mounted on the fixing member mounting platform 350, the side wall of the PCB board fixing member 510 is clamped on the fixing member mounting platform 350, so that no other fixing structure is required, and the PCB board fixing member 510 can be fixed by processing the housing 300 itself, which is convenient and fast and also saves the production cost of producing other fixing components.

[0056] In another embodiment of the present invention, Figure 2-Figure 5 as well as Figure 12-13As shown, the PCB board fixing part 510 is provided with a plurality of medium guide holes 511, and the bottom of each medium guide hole 511 is expanded outward to form a medium expansion groove 512. Each medium guide hole 511 is used to inject the pressure-conducting medium 400 into the cavity between the PCB board fixing part 510 and the pressure-conducting elastic membrane 200. During actual assembly, the PCB board fixing part 510 is first installed in the housing 300, and then the pressure-conducting medium 400 is injected through each medium guide hole 511. After the pressure-conducting medium 400 is injected into the cavity between the PCB board fixing part 510 and the pressure-conducting elastic membrane 200, a vacuum treatment is performed to extract excess gas. During the process of injecting the pressure-conducting medium 400, the medium expansion groove is used to accelerate the outflow of the pressure-conducting medium 400, improve the injection efficiency, and prevent the problem of blockage during injection.

[0057] In another embodiment of the present invention, Figure 2-Figure 4 As shown, the detection sensor for washing machine further includes a silicone fixing member 700, which is arranged in the housing 300 and located above the detection PCB board fixing member 510. The silicone fixing member 700 is also connected to the detection PCB board 520 and covers the local arrangement of the detection PCB board 520. In this embodiment, the silicone fixing member 700 is made of silicone. After the pressure conducting medium 400 is injected and vacuumized, silicone is injected into the housing 300, and the silicone is left to stand for a preset time until the silicone solidifies, thereby forming the silicone fixing member 400. After the silicone fixing member 400 solidifies, the medium guide hole 512 is blocked to ensure that the pressure conducting medium 400 is in the sealed cavity. In addition, the silicone fixing member 700 will adhere to the PCB fixing member 510 and the inner side wall of the housing 300 during the solidification process, thereby playing the role of fixing itself in the housing 300 and fixing the PCB fixing member 510 at the same time.

[0058] In another embodiment of the present invention, Figure 14-17 As shown, a detection circuit is provided on the detection PCB board, 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.

[0059] Wherein, the interface circuit 110 is connected to the washing machine main control board 180 of the washing machine;

[0060] The voltage conversion circuit 120 is connected to the interface circuit 110;

[0061] The main control circuit 130 is connected to the voltage conversion circuit 120 and the interface circuit 110;

[0062] The water pressure and temperature detection circuit 140 is connected to the voltage conversion circuit 120 and the main control circuit 130. The water pressure and temperature detection circuit 140 is used to detect the 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 via the interface circuit 110.

[0063] The present invention sets an interface circuit 110, a voltage conversion circuit 120, a main control circuit 130 and a water pressure and temperature detection circuit 140, and connects the water pressure and temperature detection circuit 140 with the voltage conversion circuit 120 and the main control circuit 130, so that the water pressure and temperature detection circuit 140 detects the water pressure and temperature that are sequentially transmitted to the pressure transmission medium 400 through the pressure transmission elastic membrane 200 and reach the water pressure and temperature detection circuit 140, 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 washing machine main control board 180 through the interface circuit 110. In this way, the water pressure and temperature detection circuit 140 can realize dual detection of water temperature and water pressure without setting a plurality of branch sensors, thereby reducing production costs. Compared with the mechanical structure for measuring water temperature and water pressure, the water pressure and temperature information measured has a higher accuracy rate, and has extremely high practicality.

[0064] In another embodiment of the present invention, Fig.14 As shown, 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 a chip of the same type can be selected by ordinary technicians in this field according to actual needs.

[0065] In another embodiment of the present invention, Fig.14As shown, the water pressure and temperature detection circuit 140 includes a water pressure and temperature detection chip U3, the water pressure and temperature detection chip U3 is connected to the voltage conversion circuit 120, the data transmission pin of the temperature detection chip U3 is connected to the data transmission pin of the main control chip U2, and the clock control pin of the temperature detection chip U3 is connected to the clock control pin of the main control chip U2. Specifically, the data transmission pin of the temperature detection chip U3 is the SDA pin, and the clock control pin of the temperature detection chip U3 is the SCL pin. In this embodiment, the third pin of the temperature detection chip U3 is connected to the eleventh pin of the main control chip U2, and the fourth pin of the temperature detection 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 DPS310.

[0066] The DPS310 digital pressure sensor is a miniature atmospheric pressure sensor with high precision and low current consumption. The sensor is based on the principle of capacitive sensing and can measure pressure and temperature. This ensures high accuracy during temperature changes. By using this sensor, the precision and accuracy of data measurement are greatly improved.

[0067] The internal signal processor of DPS310 converts the output of the pressure and temperature sensor elements into 24-bit results. Each unit is calibrated individually. The calibration coefficients calculated in this process are stored in the calibration registers. These coefficients are used to convert the measurement results into high-precision pressure and temperature values. In this way, the temperature and water pressure can be measured at one time through the temperature detection chip U3, which is efficient and convenient.

[0068] In another embodiment of the present invention, Fig.14 As shown, 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 end of the washing machine main control board 180, and the output pin of the voltage stabilizing chip U1 is respectively connected to the power supply pin of the main control chip U2 and the power supply pin of the water pressure and temperature detection chip U3, and supplies power to the main control chip U2 and the water pressure and temperature detection chip U3. In this embodiment, the power supply output end of the washing machine main control board 180 is labeled VIN. The input pin of the voltage stabilizing chip U1 is the second pin of the voltage stabilizing chip U1, and the output pin of the voltage stabilizing chip U1 is the third pin of the voltage stabilizing chip U1. The voltage output from the power supply output end of the washing machine main control board 180 is converted by the voltage stabilizing chip U1 and outputs 3.3V from its third pin. The power supply pin of the main control chip U2 is the ninth pin, and the power supply pin of the water pressure and temperature detection chip U3 is the eighth pin. The model of the voltage stabilizing chip U1 is preferably TLV70433.

[0069] In another embodiment of the present invention, Figure 14-15 As shown, the voltage conversion circuit 120 further includes an input protection circuit 121, and the input protection circuit 121 is arranged between the power supply output end of the washing machine main control board 180 and the input pin of the voltage stabilizing chip U1.

[0070] In another embodiment of the present invention, Fig.14 As shown, the input protection circuit 121 includes a resettable fuse JZ1, and the two ends of the resettable fuse JZ1 are respectively connected to the power supply output end of the washing machine main control board 180 and the input pin of the voltage stabilizing chip U1. When the current passing through the resettable fuse JZ1 is too large, the resistance of the resettable fuse JZ1 will increase, thereby playing a role in protecting the circuit.

[0071] In another embodiment of the present invention, Fig.14 As shown, the input protection circuit 121 also includes a protection diode D1, the cathode of the protection diode D1 is connected to the input pin of the voltage stabilizing chip U1, and the anode of the protection diode D1 is grounded. The protection diode D1 is used to prevent the surge or spike of the voltage output from the power supply output end of the washing machine main control board 180 from damaging the subsequent circuit.

[0072] In another embodiment of the present invention, Fig.14 As shown, the interface circuit 110 includes a connection port J4, a first pin of the connection port J4 is connected to the serial port input pin of the main control chip U2, a third pin of the connection port J4 is connected to the serial port 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 the power supply output terminal of the washing machine main control board 180.

[0073] Specifically, the serial port input pin of the main control chip U2 is the RX pin, and the serial port output pin of the main control chip U2 is the 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. In this way, the parameters of the water pressure and temperature detection chip U3 are configured through the I2C communication method, and the main control chip U2 obtains the water pressure and temperature information detected by the water pressure and temperature detection chip U3 through the I2C communication method. The main control chip U2 analyzes the water pressure information through the received water pressure and temperature information to obtain the water level information in the water tub of the washing machine, and obtains the water temperature information by analyzing the temperature information. Then, the main control chip U2 sends the water level information and 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 can control the operation of the washing machine according to the water level information and water temperature information.

[0074] In another embodiment of the present invention, Figure 14-15 As shown, the detection circuit 100 also includes a vibration detection circuit 150, which 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, and the main control circuit 130 transmits the vibration information to the washing machine main control board 180 through the interface circuit 110.

[0075] Specifically, the vibration detection circuit 150 includes a vibration detection chip U4, a first pin of the vibration detection chip U4 is connected to a third pin of the voltage stabilizing chip U1, a fourteenth pin of the vibration detection chip U4 is connected to a twelfth pin of the main control chip U2, and a thirteenth pin of the vibration detection chip U4 is connected to an eleventh pin of the main control chip U2. In this embodiment, the model of the vibration detection chip U4 is preferably ADXL345 or a model of the same type.

[0076] In another embodiment of the present invention, Figure 16-Figure 17 As shown, the water pressure and temperature detection circuit 140 includes a built-in detection circuit 141 and an external detection circuit 142, and both the built-in detection circuit 141 and the external detection circuit 142 are connected to the main control circuit 130; the built-in detection circuit 141 is used to detect the water pressure in the water tub of the washing machine, and the external detection circuit 142 is used to detect the atmospheric pressure outside the water tub of the washing machine.

[0077] Specifically, the built-in detection circuit 141 and the external detection circuit 142 each include a water pressure and temperature detection chip. In this embodiment, the water pressure and temperature detection chip of the built-in detection circuit 141 is labeled U3, that is, the built-in detection circuit 141 includes the water pressure and temperature detection chip U3. The water pressure and temperature detection chip of the external detection circuit is labeled U5, that is, the external detection circuit 142 includes the water pressure and temperature detection chip U5.

[0078] The third pin and the fourth pin of the water pressure and temperature detection chip U3 and the water pressure and temperature detection chip U5 are connected to the eleventh pin and the twelfth pin of the main control chip U2 respectively.

[0079] Among them, the fifth pin of the water pressure and temperature detection chip U3 is suspended, so that the highest bit of the I2C slave address of the water pressure and temperature detection chip U3 is 1, and the fifth pin of the water pressure and temperature detection chip U5 is grounded, so that the lowest bit of the I2C slave address of the water pressure and temperature detection chip U5 is 0, so that the main control chip U2 can distinguish the water pressure and temperature detection chip U3 and the water pressure and temperature detection chip U5 according to the slave address, and can independently realize the communication between the main control chip U2 and the water pressure and temperature detection chip U3 and the water pressure and temperature detection chip U5.

[0080] Furthermore, in actual applications, the detection end of the water pressure and temperature detection 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 detection end of the water pressure and temperature detection chip U3 of the built-in detection circuit 141 is facing the water pressure in the water tub, which is actually the water pressure plus the atmospheric pressure. The main control chip U2 converts the sum of the water pressure and the atmospheric pressure into the water level information in the water tub and sends it to the main control board of the washing machine.

[0081] If the washing machine is located on a higher floor, such as the 20th floor, the difference between the atmospheric pressure on the 20th floor and the atmospheric pressure on the 1st floor is too large. If the sum of the water pressure and the atmospheric pressure is directly converted into the water level height information in the water tub on the 20th floor, a large error will occur, resulting in inaccurate water level detection in the washing machine, which will affect the operation of the washing machine. Therefore, in the present application, by setting the external detection circuit 142 and making the water pressure and temperature detection chip U5 of the external detection circuit 142 outside the area covered by the water level of the water tub, the external detection circuit 142 detects the atmospheric pressure outside the water tub of the washing machine. In this way, the main control chip U2 subtracts the pressure value detected by the water pressure and temperature detection chip U5 of the external detection circuit 142 from the pressure value detected by the water pressure and temperature detection chip U3 of the built-in detection circuit 141 to obtain the pressure value of the actual water level, and then converts the pressure value of the actual water level to obtain the actual water level height information in the water tub. In this way, by setting the built-in detection circuit 141 and the external detection circuit 142 to eliminate the influence of the change of the external atmospheric pressure on the water level detection in the water tub of the washing machine, accurate measurement of the water level is achieved, which is extremely practical.

[0082] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A detection sensor for a washing machine, characterized in that: The device comprises a shell, a pressure-conducting elastic membrane, a pressure-conducting medium and a pressure-detecting PCB board, wherein a bottom opening is provided at the bottom of the shell, the pressure-conducting elastic membrane is installed in the shell and seals the bottom opening, the pressure-conducting medium is accommodated in the shell and covers the pressure-conducting elastic membrane, the pressure-detecting PCB board is installed in the shell and covers the pressure-conducting medium, and a detection end of the pressure-detecting PCB board extends into the pressure-conducting medium, so that the external pressure is sequentially transmitted through the pressure-conducting elastic membrane and the pressure-conducting medium to the detection end of the pressure-detecting PCB board, thereby enabling the pressure-detecting PCB board to detect the external pressure; The periphery of the bottom of the shell extends toward the center of the bottom opening to form an elastic membrane mounting portion, and the periphery of the pressure-conducting elastic membrane is connected to the elastic membrane mounting portion; The elastic membrane mounting portion includes a receiving platform, the periphery of the receiving platform is curled into the shell to form a fixed ridge, and the inner surface of the fixed ridge is in contact with the periphery of the pressure-conducting elastic membrane; The pressure detection PCB board is provided with a detection circuit, and the detection circuit comprises: An interface circuit connected to a washing machine main control board of the washing machine; A voltage conversion circuit, wherein the voltage conversion circuit is connected to the interface circuit; A main control circuit, the main control circuit is connected to the voltage conversion circuit and the interface circuit; A pressure and temperature detection circuit, the pressure and temperature detection circuit is connected to the voltage conversion circuit and the main control circuit, the pressure and temperature detection circuit is used to detect the pressure and temperature information in the washing machine and transmit 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 main control board of the washing machine via the interface circuit; The pressure and temperature detection circuit includes a built-in detection circuit and an external detection circuit, both of which are connected to the main control circuit; the built-in detection circuit is used to detect the pressure in the water tub of the washing machine, and the external detection circuit is used to detect the atmospheric pressure outside the water tub of the washing machine; The detection end of the water pressure and temperature detection chip of the built-in detection circuit is located at the bottom of the water tub of the washing machine, that is, the detection end of the water pressure and temperature detection chip of the built-in detection circuit is facing the water pressure in the water tub, which is actually the water pressure plus the atmospheric pressure. The main control chip in the main control circuit converts the sum of the water pressure and the atmospheric pressure into the water level height information in the water tub and sends it to the main control board of the washing machine.

2. The detection sensor for a washing machine according to claim 1, characterized in that: The detection sensor for the washing machine also includes an elastic membrane pressing part, which is installed in the shell; a clearance hole for avoiding the pressure-conducting elastic membrane is provided in the middle of the elastic membrane pressing part, and the bottom surface of the periphery of the elastic membrane pressing part is pressed against the top surface of the periphery of the pressure-conducting elastic membrane so that the bottom surface of the periphery of the pressure-conducting elastic membrane fits with the receiving platform and the fixed ridge.

3. The detection sensor for a washing machine according to claim 2, characterized in that: A pressing member installation portion matching the elastic film pressing member is provided at the bottom of the shell, so that the elastic film pressing member is engaged in the pressing member installation portion.

4. The detection sensor for a washing machine according to claim 3, characterized in that: The elastic membrane clamping piece includes an annular clamping plate, the periphery of which extends in a direction perpendicular to the annular clamping plate to form a tight-fitting column, the bottom surface of the tight-fitting column abuts against the receiving platform, and the outer side of the tight-fitting column is tightly connected to the inner surface of the clamping piece mounting portion.

5. The detection sensor for a washing machine according to claim 4, characterized in that: A first protruding tight-fitting portion is provided on the peripheral ring of the pressure-conducting elastic membrane, and two sides of the first protruding tight-fitting portion are respectively fitted with the annular pressing plate and the receiving platform.

6. The detection sensor for a washing machine according to claim 5, characterized in that: The side of the pressure-conducting elastic membrane facing away from the pressure-conducting medium expands and extends in the direction of the pressure-conducting medium to form a plurality of pressure-conducting inner recesses.

7. The detection sensor for a washing machine according to any one of claims 1 to 6, characterized in that: The material of the pressure-conducting elastic membrane is silica gel.

8. The detection sensor for a washing machine according to any one of claims 2 to 6, characterized in that: The pressure detection PCB board includes a PCB board fixing part and a detection PCB board, the pressure detection PCB board is partially clamped on the PCB board fixing part, and the pressure detection PCB board is partially immersed in the pressure conduction medium; the PCB board fixing part is installed in the shell, and the bottom of the PCB board fixing part is in contact with the upper end surface of the pressure conduction medium.

9. The detection sensor for a washing machine according to claim 8, characterized in that: The detection sensor for the washing machine further comprises a fixing bracket, wherein the fixing bracket is mounted on the elastic film pressing member, and the PCB board fixing member is installed on the fixing bracket.

10. The detection sensor for a washing machine according to claim 9, characterized in that: The fixing bracket includes a support frame, and a plurality of support columns are arranged at the bottom of the support frame; the upper surface of the support frame contacts the PCB board fixing member, and the bottom of the support column is pressed on the elastic film clamping member.

11. The detection sensor for a washing machine according to claim 8, characterized in that: A partial side wall in the middle of the shell extends toward the outside of the shell to form a fixing member mounting platform, and the fixing member mounting platform is matched with the PCB board fixing member so that the PCB board fixing member is mounted on the fixing member mounting platform.

12. The detection sensor for a washing machine according to claim 11, characterized in that: The PCB board fixing member is provided with a plurality of medium guide holes, and the bottom of each of the medium guide holes is expanded outwards to form a medium outward expansion groove.

13. The detection sensor for a washing machine according to any one of claims 1 to 6, characterized in that: The detection sensor for the washing machine also includes a silicone fixing part, which is arranged in the shell and located above the pressure detection PCB board fixing part. The silicone fixing part is also connected to the pressure detection PCB board and covers a partial setting of the pressure detection PCB board.

14. The detection sensor for a washing machine according to claim 1, characterized in that: The detection circuit also includes a vibration detection circuit, which is connected to the main control circuit and the voltage conversion circuit. The vibration detection circuit is used to detect vibration information of the washing machine and transmit 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.

15. The detection sensor for a washing machine according to any one of claims 1 to 6, characterized in that: The material of the pressure transmission medium is silicone oil.

16. The detection sensor for a washing machine according to any one of claims 1 to 6, characterized in that: The shell is made of stainless steel.

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