Dry-burning-resistant water heater
The anti-dry-burning component, which combines a float ball and a micro switch, solves the problem of dry burning of water heaters at low water levels, achieves safe and reliable water level detection and heating control, and reduces costs and failure rates.
Patent Information
- Application Number
- CN202520342325.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-28
- Publication Date
- 2026-01-30
- Estimated Expiration
- 2035-02-28
AI Technical Summary
Existing water heaters are prone to dry burning when the water level is low, which poses a safety hazard. Furthermore, existing anti-dry burning technologies are susceptible to water quality and electromagnetic interference, or have complex structures and high costs.
The anti-dry-burning component uses a combination of a float and a micro switch. The float is connected to the micro switch via a connecting rod to monitor water level changes in real time. When the water level is lower than the safe water level, the heating circuit is cut off.
It achieves accurate and reliable water level detection, avoids dry burning, reduces costs and failure rate, has a simple structure, is easy to install, and is suitable for existing water heaters.
Smart Images
Figure CN223855880U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to domestic appliance technical field especially relates to a dry burning prevention water heater. BACKGROUND
[0002] At present, the water heater on the market has the risk of dry burning in the use process. When the water level in the water heater is too low, if the heating device continues to work, it is easy to cause safety accidents, such as damaging the inner liner of the water heater, causing fire, etc. The existing dry burning prevention technology mainly has electronic induction type and mechanical type, but the electronic induction type is easy to be affected by water quality, electromagnetic interference and other factors, leading to misjudgment or failure;And the traditional mechanical structure is often relatively complex, the safety is not high, and the cost is high. Therefore, it is necessary to develop a dry burning prevention water heater with simple structure, high reliability and low cost. SUMMARY
[0003] In view of this, the present application aims to at least solve the problems in the related art, and the purpose of the present application is to provide a dry burning prevention water heater, which can accurately and reliably detect water level change and timely cut off the heating circuit.
[0004] The dry burning prevention water heater provided by the present application comprises an outer shell and a dry burning prevention assembly;The inner shell is arranged in the outer shell;The inner shell is internally provided with a heater;The dry burning prevention assembly comprises a micro switch and an indicating piece for indicating water level;The indicating piece is movably connected with the micro switch;The micro switch is connected in series with the heater;When the indicating piece indicates high position, the micro switch is triggered to be in closed state, and the heater works normally;When the indicating piece indicates low position, the micro switch is triggered to be in open state, and the power supply of the heater is cut off.
[0005] When hot water is needed, the power supply of the heater is turned on, and the heater starts to heat the water in the inner shell. The dry burning prevention assembly monitors the water level in the inner shell in real time. The water level in the inner shell higher than or equal to the safe water level range belongs to "high position", and the water level lower than the safe water level range belongs to "low position". When the water level is higher than or equal to the safe water level, the indicating piece is in high position, and the micro switch is in closed state, so that the heater can work normally;When the water level is lower than the safe water level, the indicating piece is in low position, so that the micro switch is in open state. Since the circuit of the heater and the micro switch is in series, the heater is in open circuit state at this time, and the heating work is stopped.
[0006] The application guarantees the use safety of the water heater through the dry burning prevention assembly, adopts the combination of the indicating element and the micro switch, replaces the traditional complicated electronic induction type or mechanical type dry burning prevention assembly, and reduces the cost and the failure rate.
[0007] In the preferable technical scheme of the utility model, the indicating element includes a floating ball and a connecting rod; the floating ball is located inside the inner container; the micro switch is located outside the inner container; the floating ball is connected with the micro switch through the connecting rod; when the water level in the inner container is higher than or equal to the safe water level, the floating ball is in a high position, the micro switch is in a closed state through the connecting rod, and the heater works normally; when the water level in the inner container is lower than the safe water level, the floating ball is in a low position, the micro switch is opened through the connecting rod, and the power supply of the heater is cut off.
[0008] When the water level is higher than or equal to the safe water level, the floating ball is in a high position under the action of the buoyancy, at this time, the connecting rod presses the micro switch, the micro switch is kept in a closed state, and the heater is kept in a heating state. When the water level drops to a certain degree, the floating ball drops with the water level, the micro switch is opened through the connecting rod, the power supply of the heater is cut off, the dry burning phenomenon is avoided, and the use safety is guaranteed. When the water level gradually recovers to the safe water level, the floating ball rises with the water level, the connecting rod moves upward, the micro switch returns to the closed state, the heating circuit is conducted again, and the water heater continues to heat.
[0009] In the preferable technical scheme of the utility model, one end of the connecting rod is connected with the top of the floating ball; the other end of the connecting rod is provided with a movable joint; and the trigger part of the micro switch is connected with the movable joint.
[0010] The shape of the connecting rod has diversity, can be in an L shape or other shapes, one end of the connecting rod is connected with the top of the floating ball, and the other end is connected with the micro switch through the movable joint. The movable joint mainly has the function of movably contacting the micro switch, so that the micro switch is in a closed state when the water level is higher than or equal to the safe water level, and the micro switch is in an open state when the water level is too low.
[0011] In the preferable technical scheme of the utility model, the movable joint is a rotatable spherical joint, when the water level in the inner container is higher than or equal to the safe water level, the floating ball is at the high position, the spherical joint is pressed to touch the micro switch, the micro switch is in the closed state, and the heater normally works, when the water level in the inner container drops to a certain degree, the floating ball drops with the water level, the spherical joint drives the micro switch to disconnect, and the heater power supply is cut off.
[0012] The spherical joint can rotate freely relative to the connecting rod, reduces the frictional resistance with other components, facilitates the disengagement and pressing touch of the connecting rod to the micro switch, realizes the quick control of the connecting rod to the micro switch, and improves the sensitivity of the dry-burning prevention assembly to the water level monitoring in the inner container.
[0013] In the preferable technical scheme of the utility model, the floating ball is a hollow spherical structure.
[0014] Specifically, the floating ball is made of high-temperature-resistant and corrosion-resistant polypropylene plastic material, has good chemical stability and mechanical properties, and can be used in the high-temperature water environment of the water heater for a long time without damage. The floating ball adopts a hollow spherical structure and has a low density, and has good suspensibility in water.
[0015] In the preferable technical scheme of the utility model, the diameter of the floating ball is 50-100mm.
[0016] The diameter of the floating ball is designed according to the size of the inner container of the water heater and the water level monitoring requirement, and is generally 50-100mm. The floating ball with the diameter has good universality.
[0017] In the preferable technical scheme of the utility model, the heat preservation assembly further comprises a heat preservation layer and a reflective layer, the heat preservation layer is wrapped outside the inner container, and the reflective layer is arranged outside the heat preservation layer.
[0018] The heat preservation material of the heat preservation layer is polyurethane foam, which is wrapped outside the inner container, can block the heat emitted by the inner container, and reduces the heat loss of the inner container to the outside. The reflective layer is made of high-reflectivity metal foil and is arranged outside the heat preservation layer. Its function is to reflect the heat radiated by the inner container back to the inner container, further reduce the heat loss, and improve the energy utilization efficiency.
[0019] In the preferable technical scheme of the utility model, the inner container comprises an inner layer and an outer layer, and a vacuum heat insulation layer is formed between the inner layer and the outer layer.
[0020] The vacuum heat insulation layer is formed between the inner layer and the outer layer, which can further reduce the heat loss, so that the hot water can maintain a certain temperature for a long time, and the heat preservation performance of the water heater is improved.
[0021] In the preferable technical scheme of the utility model, the heater is a spiral heating pipe.
[0022] The spiral heating pipe has a large surface area and is in more sufficient contact with water, so that the water can be heated quickly.
[0023] In the preferable technical scheme of the utility model, the surface of the shell is provided with a plurality of cooling fins.
[0024] When the water heater generates excess heat during the heating process, the cooling fins can increase the heat dissipation area, can quickly dissipate the heat in time, prevent the shell from being damaged due to overheating, and prolong the service life of the shell.
[0025] The utility model has at least the following beneficial effects:
[0026] The application guarantees the use safety of the water heater through the dry burning prevention assembly, adopts the combination of the indicating part and the micro switch, replaces the traditional complex electronic induction type or mechanical type dry burning prevention assembly, reduces the cost and the failure rate. The indicating part directly detects the water level and is not affected by factors such as water quality and electromagnetic interference, can accurately and reliably detect the water level change, and the combination with the micro switch can cut off the heating circuit in time. The various components of the application have simple structure and are convenient to install, can be directly installed on the existing inner container of the water heater, do not need to make large-scale transformation to the water heater, provide a high-efficiency, safe and durable dry burning prevention water heater for users. BRIEF DESCRIPTION OF DRAWINGS
[0027] The drawings incorporated into the description and forming a part of the description show embodiments consistent with the application and, together with the description, serve to explain the principles of the application.
[0028] In order to more clearly illustrate the technical scheme in the embodiments of the application or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced as follows, and obviously, other drawings can also be obtained by those skilled in the art without creative labor.
[0029] Figure 1 It is a schematic view of a dry burning prevention water heater in the embodiment;
[0030] Reference signs:
[0031] Inner container; 111, vacuum heat insulation layer; 12, floating ball; 121, connecting rod; 122, micro switch; 13, heater; 131, heater power supply. DETAILED DESCRIPTION
[0032] In order to make the technical features, objectives and effects of the present application more clearly understood, the specific embodiments of the present application will be described in detail with reference to the drawings. In the following description, it should be understood that the "front", "back", "upper", "lower", "left", "right", "vertical", "horizontal", "vertical", "horizontal", "top", "bottom", "inner", "outer", "head", "tail" and other indicated orientation or positional relationships are based on the orientation or positional relationships shown in the drawings, constructed and operated in a particular orientation, and are only for the convenience of describing the technical solutions, and do not indicate that the indicated mechanisms or elements must have a particular orientation, therefore, it cannot be understood as a limitation on the present application.
[0033] It should also be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing", "setting" and the like should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements or the interaction relationship between two elements. When an element is referred to as "on" or "under" another element, the element can be "directly" or "indirectly" located on the other element, or there can be one or more intervening elements. The terms "first", "second", "third" and the like are only for the convenience of describing the technical solutions, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features, therefore, the features with "first", "second", "third" and the like can be explicitly or implicitly include one or more of the features. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0034] In the following description, specific details such as specific system structures, technologies, etc. are presented for the purpose of thorough understanding of the embodiments of the present application, but those skilled in the art should understand that the present application can also be implemented in other embodiments without these specific details. In other cases, detailed description of well-known systems, mechanisms, circuits and methods is omitted to avoid unnecessary details that hinder the description of the present application. Embodiment 1
[0035] As Figure 1As shown, the embodiment provides a dry-burning prevention water heater, the application provides a dry-burning prevention water heater, which comprises a shell and a dry-burning prevention assembly; the shell is provided with an inner container 11; the inner container 11 is internally provided with a heater 13; the dry-burning prevention assembly comprises a micro switch 122 and an indicating piece for indicating water level; the indicating piece is movably connected with the micro switch 122; the micro switch 122 is connected in series with the heater 13; when the indicating piece indicates high position, the micro switch 122 is triggered to be in closed state, and the heater 13 normally works; when the indicating piece indicates low position, the micro switch 122 is triggered to be in open state, and the heater power supply 131 is cut off.
[0036] When hot water is needed, the power supply of the heater 13 is turned on, and the heater 13 starts to heat the water in the inner container 11, and the dry-burning prevention assembly monitors the water level in the inner container 11 in real time. When the water level in the inner container 11 is higher than or equal to the safe water level, the range belongs to "high position", and when the water level is lower than the safe water level, the range belongs to "low position". When the water level is higher than or equal to the safe water level, the indicating piece is in high position, and the micro switch 122 is pressed to be in closed state, and the heater 13 can normally work; when the water level is lower than the safe water level, the indicating piece is in low position, and the micro switch 122 is in open state, and since the circuit of the heater 13 and the micro switch 122 is in series, the heater 13 is in open circuit state at this time, and then the heating work is stopped.
[0037] The application guarantees the use safety of the water heater through the dry-burning prevention assembly, adopts the combination of the indicating piece and the micro switch 122, replaces the traditional complex electronic induction type or mechanical type dry-burning prevention assembly, reduces the cost and failure rate. The indicating piece can directly detect the water level and is not affected by water quality, electromagnetic interference and other factors, can accurately and reliably detect the change of the water level, and can timely cut off the heating circuit in combination with the micro switch 122. The various components of the application have simple structure and are convenient to install, can be directly installed on the existing inner container 11 of the water heater, do not need to make large-scale transformation to the water heater, and provide a high-efficiency, safe and durable dry-burning prevention water heater for users. Embodiment 2
[0038] As Figure 1As shown, the embodiment provides a dry-burning prevention water heater, the application provides a dry-burning prevention water heater, which comprises a shell and a dry-burning prevention assembly; an inner container 11 is arranged in the shell; a heater 13 is arranged inside the inner container 11; the dry-burning prevention assembly comprises a micro switch 122 and an indicating piece for indicating water level; the indicating piece is movably connected with the micro switch 122; the micro switch 122 is connected in series with the heater 13; when the indicating piece indicates high position, the micro switch 122 is triggered to be in closed state, and the heater 13 normally works; when the indicating piece indicates low position, the micro switch 122 is triggered to be in open state, and the heater power supply 131 is cut off.
[0039] Preferably, the indicating piece comprises a floating ball 12 and a connecting rod 121; the floating ball 12 is located inside the inner container 11; the micro switch 122 is located outside the inner container 11; the floating ball 12 is connected with the micro switch 122 through the connecting rod 121; the micro switch 122 is connected in series with the heater 13; when the water level in the inner container 11 is higher than or equal to the safe water level, the floating ball 12 is in high position, the micro switch 122 is in closed state through the connecting rod 121, and the heater 13 normally works; when the water level in the inner container 11 is lower than the safe water level, the floating ball 12 is in low position, the micro switch 122 is disconnected through the connecting rod 121, and the heater power supply 131 is cut off.
[0040] When the water level is higher than or equal to the safe water level, the floating ball 12 is in high position under the action of buoyancy, at this time the connecting rod 121 presses the micro switch 122 to keep it in closed state, and the heater 13 keeps heating state. When the water level drops to a certain degree, the floating ball 12 drops with the water level, the micro switch 122 is disconnected through the connecting rod 121, the power supply of the heater 13 is cut off, and the dry-burning phenomenon is avoided, which ensures the safety in use. When the water level gradually recovers to the safe water level, the floating ball 12 rises with the water level, the connecting rod 121 moves upward, the micro switch 122 returns to closed state, the heating circuit is turned on again, and the water heater continues to heat.
[0041] Preferably, one end of the connecting rod 121 is connected with the top of the floating ball 12; the other end of the connecting rod 121 is provided with a movable joint; the trigger part of the micro switch 122 is connected with the movable joint.
[0042] The shape of the connecting rod 121 has diversity, which can be "L" shape or other shapes, one end of the connecting rod 121 is connected with the top of the floating ball 12, and the other end is connected with the micro switch 122 through the movable joint. The main function of the movable joint is to movably contact the micro switch 122, so that when the water level is higher than or equal to the safe water level, the micro switch 122 is in closed state, and when the water level is too low, the micro switch 122 is in open state.
[0043] Preferably, the movable joint is a rotatable spherical joint, when the water level in the inner container 11 is higher than or equal to the safe water level, the floating ball 12 is in the high position, the micro switch 122 is pressed through the spherical joint, so that the micro switch 122 is in the closed state, and the heater 13 works normally; when the water level in the inner container 11 drops to a certain extent, the floating ball 12 drops with the water level, and the micro switch 122 is disconnected through the spherical joint, so that the heater power supply 131 is cut off.
[0044] The spherical joint can rotate freely relative to the connecting rod 121, which reduces the frictional resistance with other components, facilitates the disengagement and pressing of the connecting rod 121 from the micro switch 122, realizes quick control of the connecting rod 121 on the micro switch 122, and improves the sensitivity of the dry burning prevention assembly in monitoring the water level in the inner container 11. Embodiment 3
[0045] As shown in Figure 1 The embodiment provides a dry burning prevention water heater, and the dry burning prevention water heater comprises a shell and a dry burning prevention assembly; the shell is internally provided with an inner container 11; the inner container 11 is internally provided with a heater 13; the dry burning prevention assembly comprises a micro switch 122 and an indicating piece for indicating a water level; the indicating piece is movably connected with the micro switch 122; the micro switch 122 is connected in series with the heater 13; when the indicating piece indicates a high position, the micro switch 122 is triggered to be in a closed state, and the heater 13 works normally; when the indicating piece indicates a low position, the micro switch 122 is triggered to be in an open state, and the heater power supply 131 is cut off.
[0046] Preferably, the floating ball 12 is a hollow spherical structure.
[0047] Specifically, the floating ball 12 is made of high-temperature-resistant and corrosion-resistant polypropylene plastic material, has good chemical stability and mechanical properties, and can be used in the high-temperature water environment of the water heater for a long time without being damaged. The floating ball 12 adopts a hollow spherical structure and has a relatively low density, and has good suspensibility in water.
[0048] Preferably, the diameter of the floating ball 12 is 50-100 mm.
[0049] The diameter of the floating ball 12 is designed according to the size of the inner container 11 of the water heater and the water level monitoring requirement, and is generally 50-100 mm. The floating ball 12 with the diameter has good universality.
[0050] Preferably, the dry burning prevention water heater further comprises a heat preservation assembly; the heat preservation assembly comprises a heat preservation layer and a reflecting layer; the heat preservation layer is wrapped outside the inner container 11; and the reflecting layer is arranged outside the heat preservation layer.
[0051] The heat preservation material of the heat preservation layer is polyurethane foam, which is wrapped outside the inner container 11 and can block the heat emitted by the inner container 11 to reduce the heat loss of the inner container 11 to the outside. The reflective layer is arranged outside the heat preservation layer and is made of a high-reflectivity metal foil. Its function is to reflect the heat radiated by the inner container 11 back to the inner container 11, further reducing heat loss and improving energy utilization efficiency.
[0052] Preferably, the inner container 11 comprises an inner layer and an outer layer; a vacuum heat insulation layer 111 is formed between the inner layer and the outer layer.
[0053] The vacuum heat insulation layer 111 is formed between the inner and outer layers, which can further reduce heat loss, so that the hot water can maintain a certain temperature for a longer period of time, improving the heat preservation performance of the water heater.
[0054] Preferably, the heater 13 is a spiral heating pipe.
[0055] Compared with the ordinary shape of the heating pipe, the spiral heating pipe has a larger surface area and more complete contact with water, which can quickly heat the water.
[0056] Preferably, the surface of the shell is provided with a plurality of cooling fins.
[0057] When the water heater generates excess heat during the heating process, the cooling fins can increase the heat dissipation area, quickly dissipate the heat in time, prevent the shell from being damaged due to overheating, and prolong the service life of the shell.
[0058] It can be understood that the above embodiments only express the preferred embodiments of the present application, and the description is more specific and detailed, but it cannot be understood as a limitation on the scope of the patent of the present application; it should be pointed out that for ordinary skilled in the art, the above technical features can be freely combined without departing from the concept of the present application, and some modifications and improvements can be made, which belong to the protection scope of the present application; therefore, any equivalent transformation and modification within the scope of the claims of the present application shall belong to the scope of the claims of the present application.
Claims
1. A dry-burn prevention water heater characterized by comprising: It comprises a shell and a dry-burn prevention assembly; an inner container (11) is arranged in the shell; a heater (13) is arranged inside the inner container (11); the dry-burn prevention assembly comprises a micro switch (122) and an indicating member for indicating water level; the indicating member is movably connected with the micro switch (122); the micro switch (122) is connected in series with the heater (13); The indicating member comprises a floating ball (12) and a connecting rod (121); the floating ball (12) is arranged inside the inner container (11); the micro switch (122) is arranged outside the inner container (11); the floating ball (12) is connected with the micro switch (122) through the connecting rod (121); when the water level in the inner container (11) is higher than or equal to a safe water level, the floating ball (12) is in a high position, the micro switch (122) is in a closed state through the connecting rod (121), and the heater (13) works normally; when the water level in the inner container (11) is lower than the safe water level, the floating ball (12) is in a low position, the micro switch (122) is disconnected through the connecting rod (121), and the heater power supply (131) is cut off.
2. A dry-fire protection water heater as defined in claim 1, wherein One end of the connecting rod (121) is connected with the top of the floating ball (12); the other end of the connecting rod (121) is provided with a movable joint; a triggering part of the micro switch (122) is connected with the movable joint.
3. A dry-fire protection water heater as defined in claim 2 wherein, The movable joint is a rotatable spherical joint; when the water level in the inner container (11) is higher than or equal to the safe water level, the floating ball (12) is in the high position, the micro switch (122) is pressed through the spherical joint, the micro switch (122) is in the closed state, and the heater (13) works normally; when the water level in the inner container (11) is lower than the safe water level, the floating ball (12) is in the low position, the micro switch (122) is disconnected through the spherical joint, and the heater power supply (131) is cut off.
4. A dry-fire safe water heater as claimed in any one of claims 1 to 3, wherein, The floating ball (12) is a hollow spherical structure.
5. A dry-fire protection water heater as claimed in any one of claims 1 to 3, wherein the heater includes a controller which is arranged to monitor the temperature of the heater and to control the operation of the heater in response to the monitored temperature. The diameter of the floating ball (12) is 50-100 mm.
6. A dry-fire protection water heater as defined in claim 1, wherein It further comprises a heat preservation assembly; the heat preservation assembly comprises a heat preservation layer and a reflecting layer; the heat preservation layer is wrapped outside the inner container (11); the reflecting layer is arranged outside the heat preservation layer.
7. A dry fire protection water heater as claimed in claim 1 wherein, The inner container (11) comprises an inner layer and an outer layer; a vacuum heat insulation layer (111) is formed between the inner layer and the outer layer.
8. A dry fire protection water heater as claimed in claim 1 wherein, The heater (13) is a spiral heating pipe.
9. A dry fire protection water heater as claimed in claim 1 wherein, A plurality of cooling fins are arranged on the surface of the shell.