Pressure sensing device and electric water heater

Abstract

The utility model relates to a pressure sensing device and electric water heater. Wherein pressure sensing device includes: first contact piece, with detection circuit electricity is connected, second contact piece can move under the action of external force and contact first contact piece, second contact piece is connected when with first contact piece detection circuit, elastic member is used for having the gap between first contact piece and second contact piece under the condition that the external force that second contact piece received is less than preset value. The pressure sensing device and electric water heater provided by the utility model can detect the water shortage of electric water heater in time, can find the water shortage of electric water heater in time, thereby are favorable to take the measure in advance to prevent electric water heater dry burning, improve the reliability and security of electric water heater.

Description

Technical Field

[0001] This utility model relates to the field of detection technology, and in particular to a pressure sensing device and an electric water heater. Background Technology

[0002] Electric water heaters convert electrical energy into heat energy through a heating element to heat the water in the tank. A thermostat controls the water temperature, ensuring a continuous supply of hot water. They are a widely used household appliance. If an electric water heater malfunctions and the water level drops below the heating element, it may dry-burn if it remains powered on. Dry-burning not only shortens the water heater's lifespan but can also pose safety hazards.

[0003] In existing technologies, temperature sensors are generally used to collect the operating parameters of electric water heaters to determine if they are dry-burning. A dry-burning protection module is integrated into the control circuit to disconnect the heating circuit when a dry-burning fault is suspected, thus improving the safety performance of the water heater. However, temperature sensors are typically installed in a blind tube near the heating element, resulting in a certain time delay (heat from the heating element is first transferred to the blind tube through the water, and then to the temperature sensor through the blind tube or the air inside the blind tube). This means that the above methods usually only provide protection when the heating element has already overheated or is dry-burning. Utility Model Content

[0004] The first technical problem solved by this utility model is to provide a pressure sensing device that can effectively detect the water shortage of an electric water heater in real time and effectively prevent the water heater from burning dry.

[0005] The second technical problem solved by this utility model is to provide an electric water heater that can effectively detect water shortage in real time and effectively avoid dry burning.

[0006] The first technical problem mentioned above is solved by the following technical solution:

[0007] A pressure sensing device, comprising:

[0008] First installation component;

[0009] A first contact element is disposed on the first mounting element and is used for electrical connection with the detection circuit;

[0010] A trigger module is slidably connected to a first mounting component. The trigger module protrudes from the first mounting component and is capable of moving and contacting the first contact component under external force. When the trigger module contacts the first contact component, the detection circuit is activated.

[0011] An elastic element is disposed between the first contact and the trigger module, and is used to create a gap between the first contact and the trigger module when the external force on the second contact is less than a preset value;

[0012] A snap-fit ​​structure is provided on the first mounting component.

[0013] The pressure sensing device described in this utility model has the following advantages compared with the prior art:

[0014] When the aforementioned pressure sensing device is applied to an electric water heater, it is conveniently and quickly installed on the water heater via a snap-fit ​​structure. It is understood that when the water level in the water heater exceeds the heating element, the trigger module protrudes from the first mounting component. Under the weight of the water heater, the trigger module contacts the first contact component, and the water heater can control the heating element to start heating. When the water level in the water heater is lower than the heating element, the trigger module separates from the first contact component under the action of the elastic component, and the water heater can control the heating element to stop heating. The detection is fast and timely, improving the delay problem and effectively preventing the water heater from dry-burning. In summary, this utility model provides a hardware device that, when applied to an electric water heater, can effectively prevent the water heater from dry-burning, improving the reliability and safety of the electric water heater.

[0015] In one embodiment, a mounting portion is provided on one side of the first mounting member, and the snap-fit ​​structure is located on this side and spaced apart from the mounting portion; wherein, the mounting portion forms a groove with one end open, the trigger module and the elastic member are mounted in the groove, and the trigger module protrudes from the groove, and the first contact member is disposed on the mounting portion.

[0016] In one embodiment, the triggering module includes a second contact and a second mounting member, the second contact being disposed on the second mounting member, the second mounting member protruding from the first mounting member, and the elastic member being disposed between the first contact and the second mounting member.

[0017] In one embodiment, the first mounting member includes an annular protrusion, the second mounting member is provided with a groove, and the second contact member and the elastic member are disposed inside the annular protrusion; the annular protrusion is inserted into the groove and can slide relative to it.

[0018] In one embodiment, the snap-fit ​​structure includes a main body and a snap-fit ​​portion, wherein a first end of the main body is connected to the first mounting member, the snap-fit ​​portion is disposed at a second end of the main body, and the main body is capable of elastic deformation.

[0019] In one embodiment, a snap-fit ​​hole is formed on the bottom surface of the groove, and a snap-fit ​​arm is provided on the first mounting member. A fastening part is provided at the end of the snap-fit ​​arm away from the first mounting member. The length of the snap-fit ​​arm is greater than the depth of the groove, and the snap-fit ​​arm can generate elastic deformation, so that the fastening part passes through the snap-fit ​​hole and fastens with the second mounting member. The fastening part is provided with a guide slope.

[0020] In one embodiment, the second mounting member is provided with a connecting end, the length of which is greater than the height of the annular protrusion. The second contact member includes a fixing part and a contact part. The fixing part is located on both sides of the contact part and extends in a direction perpendicular to the contact surface of the contact part. The fixing part is used to connect the connecting end.

[0021] In one embodiment, the elastic element is a spring, which is sleeved on the outside of the snap-fit ​​arm and the connecting end.

[0022] In one embodiment, the first contact is welded or injection molded to the first mounting member.

[0023] In one embodiment, the second mounting member has a wire hole for threading a wire.

[0024] The second technical problem mentioned above is solved by the following technical solution:

[0025] An electric water heater includes a pressure sensing device as described in any of the above embodiments. The water heater is provided with a mounting plate, which is detachably connected to the pressure sensing device via a snap-fit ​​structure. The top of the mounting plate has a hanging hole, the pressure sensing device is located at the bottom of the mounting plate, and the trigger module protrudes from the mounting plate.

[0026] The electric water heater of this utility model has the following advantages compared with the prior art:

[0027] The pressure sensing device of this electric water heater is conveniently and quickly installed on the water heater via a snap-fit ​​structure. As can be understood, when the water level in the water heater exceeds the heating element, the trigger module protrudes from the first mounting part. Under the weight of the water heater, the trigger module contacts the first contact part, and the water heater can control the heating element to start heating. When the water level in the water heater is lower than the heating element, the trigger module separates from the first contact part under the action of the elastic element, and the water heater can control the heating element to stop heating. This timely detection effectively prevents the water heater from dry-burning. In summary, the electric water heater provided by this utility model can effectively prevent dry-burning and improve the reliability and safety of the electric water heater. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 A cross-sectional view of a pressure sensing device provided in an embodiment of the present invention;

[0030] Figure 2 A side view of a pressure sensing device provided in an embodiment of this utility model;

[0031] Figure 3 An exploded structural diagram of a pressure sensing device provided in an embodiment of this utility model;

[0032] Figure 4 A top view of a pressure sensing device provided in an embodiment of this utility model;

[0033] Figure 5 This is a schematic diagram showing the installation position of the pressure sensing device and the water heater according to an embodiment of the present invention.

[0034] To make the above and other objects, features, advantages and embodiments of this utility model more apparent and understandable, the appended symbols are explained as follows:

[0035] 1. Second mounting component; 11. Annular protrusion; 12. Connecting end; 2. Elastic component; 31. Fixing part; 32. Contact part; 4. First mounting component; 41. Groove; 42. Snap-fit ​​hole; 5. First contact component; 6. Snap-fit ​​structure; 61. Main body; 62. Snap-fit ​​part; 7. Thread hole; 8. Snap-fit ​​arm; 81. Fastening part; 9. Hanging plate. Detailed Implementation

[0036] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0037] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0038] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0039] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0040] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0041] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0042] Figure 1 A cross-sectional view of a pressure sensing device provided in an embodiment of this utility model; Figure 2 A side view of a pressure sensing device provided in an embodiment of this utility model; Figure 3 An exploded structural diagram of a pressure sensing device provided in an embodiment of this utility model; Figure 4 A top view of a pressure sensing device provided in an embodiment of this utility model; see also Figures 1-4 An embodiment of the present invention provides a pressure sensing device, comprising:

[0043] First mounting component 4;

[0044] The first contact 5 is disposed on the first mounting part 4 and is used for electrical connection with the detection circuit;

[0045] A trigger module is slidably connected to the first mounting part 4. The trigger module protrudes from the first mounting part 4 and can move and contact the first contact part 5 under the action of external force. When the trigger module contacts the first contact part 5, the detection circuit is turned on.

[0046] The elastic element 2 is disposed between the first contact element 5 and the trigger module, and is used to create a gap between the first contact element 5 and the trigger module when the external force on the second contact element is less than a preset value.

[0047] The snap-fit ​​structure 6 is disposed on the first mounting component 4.

[0048] The first mounting component 4 provides a mounting base for the first contact component 5. The first contact component 5 and the trigger module can serve as the static and moving contacts of the pressure sensing device, respectively. The first contact component 5 is a fixed conductive part that forms an electrical connection with the detection circuit. The trigger module is a movable conductive part positioned opposite the first contact component 5 and can move towards the first contact component 5 under external force. The trigger module triggers the response of the detection circuit through physical contact with the first contact component 5, thereby detecting changes in pressure. The first contact component 5 and the trigger module can be in a guided fit, meaning that the fit between the first contact component 5 and the trigger module allows the trigger module to move only along a specific path relative to the first contact component 5. For example, the fit can be a sliding guided fit or a cylindrical guided fit.

[0049] The detection circuit detects whether the two contacts are conductive and converts the signal into a recognizable output such as a voltage change or a digital signal. This can be achieved through switching circuits, voltage divider circuits, and signal processing circuits. The elastic element 2 primarily functions to reset the trigger module when the pressure value is lower than a preset pressure value, causing the trigger module and the first contact 5 to separate, thus disconnecting the detection circuit. This allows for real-time reflection of pressure changes and also provides a buffer when the trigger module moves towards the first contact 5. The elastic element 2 can be a spring, rubber component, or similar structure. The trigger pressure threshold can be precisely controlled by adjusting the stiffness and initial compression of the elastic element 2. This pressure sensing device can be used to detect changes in the gravity of a wall-mounted electric water heater. When the water heater is working normally, the water stored inside is higher than the safe water level, and its weight is greater than a preset threshold. The force applied to the trigger module compresses the elastic element 2, overcoming the rebound force of the elastic element 2, so that the first contact element 5 keeps in contact with the trigger module, and the detection circuit is turned on. When the water heater is short of water, its overall weight is reduced, and the pressure applied to the trigger module is reduced. When the pressure is reduced to less than or equal to the preset threshold, the detection circuit is turned off. Thus, the presence or absence of water in the water heater can be determined by the on / off state of the detection circuit.

[0050] The snap-fit ​​structure 6 can be achieved through the elastic deformation of the material and the cooperation of the protrusion and groove structure. By setting the snap-fit ​​structure 6, the pressure sensing device can form a reliable connection with other external structures without additional fasteners, which facilitates the installation and maintenance of the pressure sensing device.

[0051] When the aforementioned pressure sensing device is used in an electric water heater, it is conveniently and quickly installed on the water heater via a snap-fit ​​structure 6. It is understood that when the water level in the water heater exceeds the heating element, the trigger module protrudes from the first mounting part 4. Under the weight of the water heater, the trigger module contacts the first contact part 5, and the water heater can control the heating element to start heating. When the water level in the water heater is lower than the heating element, under the action of the elastic part 2, the trigger module separates from the first contact part 5, and the water heater can control the heating element to stop heating. This timely detection effectively prevents the water heater from dry-burning. In summary, this utility model provides a hardware device that, when used in an electric water heater, can effectively prevent the water heater from dry-burning, improving the reliability and safety of the electric water heater.

[0052] In one embodiment, a mounting portion protrudes outward on one side of the first mounting member 4, and a snap-fit ​​structure 6 is located on this side and spaced apart from the mounting portion. The mounting portion forms a groove 41 with an open end. The trigger module and the elastic member 2 are mounted within the groove 41, with the trigger module protruding from the groove 41. A first contact member 5 is located on the mounting portion. Mounting the trigger module and the elastic member 2 within the groove 41 facilitates positioning and installation of the trigger module and provides sufficient sliding distance for the trigger module. Simultaneously, the snap-fit ​​structure 6 is located on the protruding side of the mounting portion on the first mounting member 4 and spaced apart from the mounting portion, which helps reduce the overall thickness and volume. Optionally, the opening direction of the groove 41 is opposite to that of the snap-fit ​​structure 6.

[0053] In an exemplary embodiment, the trigger module includes a second contact and a second mounting member 1. The second contact is disposed on the second mounting member 1, which protrudes from the first mounting member 4. The elastic member 2 is disposed between the first contact and the second mounting member 1. The second mounting member 1 is used to mount the second contact. The first mounting member 4 and the second mounting member 1 can be made of materials such as engineering plastics. The second mounting member 1 protrudes from the groove 41. The elastic member 2 is disposed between the first contact and the second mounting member 1. When the second mounting member 1 and the first mounting member 4 are installed together, the second mounting member 1, under the action of an external force, can move towards the first mounting member 4 and compress the elastic member 2, ultimately enabling the second contact to reliably contact the first contact and achieve the conduction of the detection circuit. When the external force is less than a preset value, the elastic member 2 can use its own restoring force to push the second mounting member 1 away from the first mounting member 4 and disconnect the detection circuit.

[0054] In an exemplary embodiment, the first mounting member 4 includes an annular protrusion 11, and the second contact member and the elastic member 2 are disposed inside the annular protrusion 11. The annular protrusion 11 is inserted into the groove 41 and can slide relative to it. The annular protrusion 11 provides mounting space for the second contact member and the elastic member 2, ensuring their fixed positions. The outer diameter of the annular protrusion 11 is smaller than the inner diameter of the groove 41, allowing its outer contour to form an insertion fit with the groove 41 of the second mounting member 1. This provides guidance for their relative sliding, restricts the direction of movement, and prevents displacement under external force that could affect the movement trajectory of the first contact member 5, or cause poor contact between the second and first contact members 5 due to radial wobble. The outer wall of the annular protrusion 11 and the inner wall of the groove 41 can be relatively smooth to reduce sliding friction, and can be made of wear-resistant materials to extend sliding life. The second mounting component 1 and the first mounting component 4 can protect the second contact component and the first contact component 5. External forces can be transmitted to the first contact component 5 through the first mounting component 4. When the first mounting component 4 is under force, it drives the first contact component 5 to move and contact the second contact component. This structure can ensure the structural strength of the pressure sensing device, and the circumferential constraint can offset the lateral forces caused by equipment shaking or installation deviation, ensuring that only axial pressure triggers the action of the contact component, thereby reducing the risk of false alarms. When the pressure sensing device is used to measure the weight of the electric water heater, the second mounting part 1 can be fixed on the mounting surface, and the first mounting part 4 faces the direction of the water heater and contacts the surface of the water heater, so that the weight of the electric water heater can act on the first mounting part 4. When there is no water shortage, under the action of the weight of the electric water heater, the elastic part 2 is compressed, and the first mounting part 4 drives the first contact part 5 to slide along the inner wall of the groove 41 and contact the second contact part, thereby connecting the detection circuit. The detection circuit can feed back a normal water level signal to the control unit of the electric water heater. When the weight of the electric water heater decreases due to water shortage, the elastic part 2 resets and pushes the first contact part 5 away to disconnect the detection circuit.

[0055] In one embodiment, the first mounting member 4 is provided with a snap-fit ​​structure 6, which is located on both sides of the first mounting member 4 and extends in a direction away from the second mounting member 1.

[0056] In one embodiment, the snap-fit ​​structure 6 includes a main body 61 and a snap-fit ​​part 62. The first end of the main body 61 is connected to the first mounting member 4, and the snap-fit ​​part 62 is disposed at the second end of the main body 61. The main body 61 is capable of elastic deformation. The snap-fit ​​structure 6 and the first mounting member 4 can be integrally formed. The main body 61 of the snap-fit ​​structure 6 can be one or more cantilever beams. One end of each cantilever beam is connected to the first mounting member 4, and the other end forms the snap-fit ​​part 62, which can be a buckle or hook. When the snap-fit ​​structure 6 consists of two cantilever beams, the hooks or buckles can both face the position between the two cantilever beams. When the pressure sensing device is installed, the two cantilever beams can deform to both sides, allowing the mounting components such as the water heater's mounting plate to enter between the two cantilever beams. The mounting components are clamped by restoring force, and the snap-fit ​​part 62 engages with the surface of the mounting component away from the first mounting member 4, thereby achieving reliable fixation with the mounting component.

[0057] In an exemplary embodiment, a snap-fit ​​hole 42 is formed on the bottom surface of the groove 41, and a snap-fit ​​arm 8 is provided on the second mounting member 1. A fastening portion 81 is provided at the end of the snap-fit ​​arm 8 away from the second mounting member 1. The length of the snap-fit ​​arm 8 is greater than the depth of the groove 41, and the snap-fit ​​arm 8 is capable of elastic deformation, allowing the fastening portion 81 to pass through the snap-fit ​​hole 42 and fasten with the first mounting member 4. The fastening portion 81 is provided with a guide slope. The number of snap-fit ​​holes 42 and snap-fit ​​arms 8 can be one or more. The snap-fit ​​hole 42 can be formed at the center of the bottom surface of the groove 41, or symmetrically arranged around the center. It can be a circular, square, rectangular, or oblong hole, and its diameter must be greater than the minimum size of the fastening portion 81 to ensure that the fastening portion 81 can pass through. The snap-fit ​​arm 8 is a deformable mechanical connector. One end is fixedly connected to the second mounting part 1, and can be integrally formed with the second mounting part 1. The other end is a free end that extends towards the groove 41 of the first mounting part 4, forming a cantilever beam structure. Its length must be greater than the depth of the groove 41 to ensure that the snap-fit ​​part 81 can extend out of the snap-fit ​​hole 42 to achieve snap-fit. The snap-fit ​​part 81 can be a hemispherical, hook-shaped, or wedge-shaped protrusion for engaging with the snap-fit ​​hole 42. The guide slope is a slope provided on the side of the snap-fit ​​part 81 that first contacts the snap-fit ​​hole 42 during installation, serving a guiding function. After the guide slope contacts the edge of the snap-fit ​​hole 42, the guiding effect of the slope can reduce installation resistance. During installation, first align the fastening part 81 with the snap-fit ​​hole 42, then push the first mounting member 4 so that the fastening part 81 enters the snap-fit ​​hole 42. Through the interaction between the snap-fit ​​hole 42 and the guide slope, the snap-fit ​​arm 8 undergoes elastic deformation, allowing the fastening part 81 to pass through the snap-fit ​​hole 42. After installation, the fastening part 81 and the snap-fit ​​hole 42 can be fastened and fixed by the elastic restoring force of the snap-fit ​​arm 8. The snap-fit ​​method allows the connection between the second mounting member 1 and the first mounting member 4 without the need for tools, facilitating installation and maintenance.

[0058] In an exemplary embodiment, the second mounting member 1 is provided with a connecting end 12, the length of which is greater than the height of the annular protrusion 11. The second contact member includes a fixing part 31 and a contact part 32. The fixing part 31 is located on both sides of the contact part 32 and extends in a direction perpendicular to the contact surface of the contact part 32. The fixing part 31 is used to connect the connecting end 12. The connecting end 12 is the connecting carrier between the second contact member and the second mounting member 1. It can be a plate-shaped or columnar structure, and can be integrally formed with the second contact member. Its length is greater than the height of the annular protrusion 11, allowing the second contact member to contact the first contact member 5. The fixing part 31 of the second contact has a symmetrical structure. By setting the fixing part 31, the contact area between the second contact and the connecting end 12 can be increased. The connecting end 12 can be clamped by the fixing parts 31 on both sides, thereby playing a preliminary fixing role. The fixing part 31 can also restrict the lateral movement of the contact part 32, ensuring that the contact surface of the contact part 32 is always aligned with the second contact, avoiding poor contact due to positional misalignment. The connecting end 12 can be provided with slots or other structures corresponding to the fixing part 31. The contact surface of the contact part 32 can be plated with gold or silver to reduce contact resistance and improve the reliability of signal transmission.

[0059] In an exemplary embodiment, the elastic element 2 is a spring, which is sleeved on the outside of the snap-fit ​​arm 8 and the connecting end 12. The spring has stable elasticity and strong controllability, and since springs are mostly standard parts, they are easy to procure in bulk and replace quickly, reducing maintenance costs. The spring is sleeved on the outside of the snap-fit ​​arm 8 and the connecting end 12, and located inside the annular protrusion 11. The inner wall of the annular protrusion 11, the snap-fit ​​arm 8, and the connecting end 12 can guide the spring, preventing it from twisting and ensuring that the elastic force is uniformly transmitted along the spring axis, thereby improving the accuracy of detection. Furthermore, no additional guiding structure is needed for the spring, improving the overall compactness of the device.

[0060] In one exemplary embodiment, the first contact 5 is welded or injection molded to the first mounting member 4. Welding or injection molding provides a high degree of stability in the connection between the two.

[0061] In one exemplary embodiment, the first mounting member 4 has a wire-passing hole 7 for threading a wire. By providing the wire-passing hole 7, the wire routing can be fixed, guide wear can be reduced, reliable connection between the wire and the second contact member can be ensured, electrical faults can be reduced, and installation efficiency can be improved.

[0062] In one exemplary embodiment, an electric water heater is also provided, including a pressure sensing device as described in the above embodiments. The electric water heater is provided with a mounting plate 9, which is detachably connected to the pressure sensing device via a snap-fit ​​structure. The top of the mounting plate 9 has a hanging hole, the pressure sensing device is located at the bottom of the mounting plate 9, and a first mounting member 1 protrudes from the mounting plate 9. The electric water heater is mounted on a wall through the hanging hole on the mounting plate 9, and the pressure sensing device is detachably connected to the mounting plate 9 via the snap-fit ​​structure 6. This pressure sensing device can be located below or to the side of the electric water heater and is in contact with the surface of the electric water heater. By detecting the pressure applied by the electric water heater, the water storage level of the electric water heater can be directly determined, helping to detect water shortage in a timely manner and avoid dry burning that could cause the inner tank to burn through and damage the electric water heater or pose a safety hazard, thereby improving the safety of the electric water heater.

[0063] In one exemplary embodiment, a gravity sensor structure is provided, including a base plate, a spring, an upper contact piece, a mounting plate, a lower contact piece, an anti-detachment clip, a wire hole, and a buckle. The lower contact piece is mounted on the mounting plate and fixed by welding or injection molding and assembly. The spring and upper contact piece are installed inside the base plate and fixedly mounted with the mounting plate by the clip. After water is injected into the water heater mounting plate, the gravity sensor is compressed by the spring, and the upper and lower contact pieces make contact signals to the computer board, which conducts the default water flow inside the water heater and prevents perforation of the plastic inner tank. The base plate structure is designed with clips to assemble and install with the mounting plate to prevent detachment. The mounting plate is designed with anti-detachment clips to assemble and install with the mounting plate, and also includes a wire hole through which the wire passes, as well as an assembly and installation structure with the upper contact piece to prevent detachment.

[0064] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0065] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A pressure sensing device, characterized in that, include: First mounting component (4); The first contact (5) is disposed on the first mounting member (4) and is used to be electrically connected to the detection circuit; The trigger module is slidably connected to the first mounting part (4). The trigger module protrudes from the first mounting part (4) and can move and contact the first contact part (5) under the action of external force. When the trigger module contacts the first contact part (5), the detection circuit is turned on. An elastic element (2) is disposed between the first contact element (5) and the trigger module, and is used to create a gap between the first contact element (5) and the trigger module when the external force on the second contact element is less than a preset value; A snap-fit ​​structure (6) is provided on the first mounting component (4).

2. The pressure sensing device according to claim 1, characterized in that, The first mounting member (4) has a mounting part protruding outward on one side, and the snap-fit ​​structure (6) is located on this side and is spaced apart from the mounting part; wherein, the mounting part forms a groove (41) with one end open, the trigger module and the elastic member (2) are installed in the groove (41), and the trigger module protrudes out of the groove (41), and the first contact member (5) is disposed on the mounting part.

3. The pressure sensing device according to claim 2, characterized in that, The triggering module includes a second contact and a second mounting member (1). The second contact is disposed on the second mounting member (1). The second mounting member (1) protrudes from the groove (41). The elastic member (2) is disposed between the first contact (5) and the second mounting member (1).

4. The pressure sensing device according to claim 3, characterized in that, The first mounting member (4) includes an annular protrusion (11), the second contact member and the elastic member (2) are disposed inside the annular protrusion (11); the annular protrusion (11) is inserted into the groove (41) and can slide relative to it.

5. The pressure sensing device according to claim 1, characterized in that, The snap-fit ​​structure (6) includes a main body (61) and a snap-fit ​​part (62), wherein the first end of the main body (61) is connected to the first mounting member (4), the snap-fit ​​part (62) is disposed at the second end of the main body (61), and the main body (61) is capable of elastic deformation.

6. The pressure sensing device according to claim 4, characterized in that, The bottom surface of the groove (41) has a snap-fit ​​hole (42), and the first mounting member (4) is provided with a snap-fit ​​arm (8). The end of the snap-fit ​​arm (8) away from the first mounting member (4) is provided with a fastening part (81). The length of the snap-fit ​​arm (8) is greater than the depth of the groove (41), and the snap-fit ​​arm (8) can generate elastic deformation, so that the fastening part (81) passes through the snap-fit ​​hole (42) and fastens with the second mounting member (1). The fastening part (81) is provided with a guide slope.

7. The pressure sensing device according to claim 4, characterized in that, The second mounting member (1) is provided with a connecting end (12), the length of the connecting end (12) is greater than the height of the annular protrusion (11), the second contact member includes a fixing part (31) and a contact part (32), the fixing part (31) is located on both sides of the contact part (32) and extends in a direction perpendicular to the contact surface of the contact part (32), and the fixing part (31) is used to connect the connecting end (12).

8. The pressure sensing device according to claim 3, characterized in that, The first contact (5) is welded or injection molded to the first mounting part (4).

9. The pressure sensing device according to claim 3, characterized in that, The second mounting component (1) has a wire hole (7) for threading wires.

10. An electric water heater, characterized in that, The electric water heater includes a pressure sensing device as described in any one of claims 1-9. The electric water heater is provided with a mounting plate (9). The mounting plate (9) is detachably connected to the pressure sensing device through the snap-fit ​​structure (6). The top of the mounting plate (9) is provided with a hanging hole. The pressure sensing device is located at the bottom of the mounting plate (9), and the trigger module protrudes from the mounting plate (9).

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