CN216114666U - Dry burning prevention electric water heater - Google Patents

Abstract

The utility model relates to an anti-dry heating electric water heater. Comprises a water storage tank body, a heating element arranged in the tank body and a controller used for controlling the heating element to be opened or closed; the water storage tank further comprises a detection module and an electronic anode rod arranged in the water storage tank body, wherein the electronic anode rod is vertically arranged; the lower part of the electronic anode rod is wrapped with an insulating layer, and the upper part of the electronic anode rod is exposed; the heating element is positioned below the top end of the insulating layer; the electronic anode bar is electrically connected with the detection module, and the detection module is electrically connected with the controller. The utility model judges whether the water in the water storage tank is lower than the threshold value by utilizing the difference of the electric signals generated by the fact that whether the exposed end of the electronic anode rod is positioned in the water storage tank, has simple principle, can not damage the parts in the inner container of the electric water heater when being detected before starting up, and has better dry burning prevention effect; the electron anode bar is arranged at the sewage draining port, so that no opening is required to be added on the inner container, the water leakage risk is reduced, and the cost is saved.

Description

Dry burning prevention electric water heater

Technical Field

The utility model belongs to the technical field of water heaters, and particularly relates to an anti-dry-heating electric water heater.

Background

The problem of dry burning is always a big pain point of a user of the water storage type water heater, and is also related to the problems of liner protection, water quality health, water and electricity consumption and the like. Once dry burning happens, the electric heating tube is damaged slightly, the safety valve is blocked by the internal parts of the burning and melting, and the life and property safety is caused by fire disasters seriously. At present, the dry burning prevention method mainly comprises the following methods, wherein firstly, a temperature controller is adopted, the characteristic of rapid temperature rise during dry burning is utilized to judge the dry burning, and the shutdown is controlled; secondly, a temperature limiter is adopted, and the temperature of the inner container is detected, so that the temperature limiter is automatically disconnected when reaching the set temperature; thirdly, the inner container is provided with an opening, a liquid level sensor is installed, and whether the inner container can be turned on or off is controlled by detecting the water level, so that the dry burning prevention effect is achieved.

Although the mode of adopting temperature controller and temperature limiter can reach the protection effect of preventing dry combustion, the protection is to take the protection after taking place to dry combustion, before it takes place to protect, the high temperature that the electrothermal tube produced may burn the spare part of melting electric water heater inner bag and block up the relief valve, causes other potential safety problems. Although the mode of installing the liquid level sensor by adding the inner container and opening the hole can protect the inner container before dry burning, the newly added hole increases the water leakage risk and has high cost, and the sensor is easily influenced by water scale and is easy to lose efficacy.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome at least one defect in the prior art, and provides the dry-heating-preventing electric water heater which can effectively prevent dry heating, avoid the occurrence of dry heating, cannot damage parts in the inner container of the electric water heater, and can protect the inner container.

In order to solve the technical problems, the utility model adopts the technical scheme that: an anti-dry heating electric water heater comprises a water storage tank body, a heating element arranged in the tank body and a controller used for controlling the heating element to be opened or closed; the water storage tank further comprises a detection module and an electronic anode rod arranged in the water storage tank body, wherein the electronic anode rod is vertically arranged; the lower part of the electronic anode rod is wrapped with an insulating layer, and the upper part of the electronic anode rod is exposed; the heating element is positioned below the top end of the insulating layer; the electronic anode bar is electrically connected with the detection module, and the detection module is electrically connected with the controller. The utility model is realized by a detection module and an electronic anode rod arranged in a water storage tank body, whether the water in the water storage tank body is lower than a threshold value is judged by utilizing the difference of electric signals generated by whether the exposed end of the electronic anode rod is positioned under the water surface, different electric signals sent by the electronic anode rod are fed back to the detection module, the detection module processes the signals and sends the processed signals to a controller, and the controller judges whether a heating element is started to heat according to the received different signals. The principle of the scheme is simple, the detection is carried out before the starting, the damage to parts in the inner container of the electric water heater can be avoided, and the dry burning prevention effect is better. Wherein the electric signal that sends when the one end that electron anode bar parcel had the insulating layer is located aquatic is different with the exposed end, thereby sets up the minimum of water level through the length value that sets up the insulating layer to prevent dry combustion method.

In one embodiment, the bottom of the water storage tank body is provided with a sewage discharge outlet communicated with the inside of the water storage tank body, and the electronic anode rod is arranged at the sewage discharge outlet; and one end wrapped with the insulating layer faces the sewage draining outlet. The electronic anode bar is arranged at the sewage draining port, so that an opening is not required to be additionally formed in the inner container, the water leakage risk is reduced, and the cost is saved.

In one embodiment, the distance between the horizontal plane of the top end of the insulating layer of the electronic anode rod and the horizontal plane of the heating element is at least more than 1 cm.

In one embodiment, the electron anode rod is a titanium anode. The titanium anode is adopted to detect signals, so that the influence caused by scale problems is avoided; in addition, the electronic anode rod can replace a magnesium rod to protect the inner container, the service life is long, the inner container is protected by utilizing the polarization current required by the electronic anode rod to emit the inner container, harmful substances are not generated, the water in the inner container can be cleaner, the service life is long, and the inner container basically does not need to be replaced.

In one embodiment, the water storage tank body comprises a shell and a liner with a cavity inside, and the shell is wrapped outside the liner; the heating element and the electronic anode bar are both positioned in the cavity.

In one embodiment, the water storage tank body is provided with a water inlet and a water outlet which are communicated with the cavity of the inner container, a water inlet pipe is connected with the water inlet, and a water outlet pipe is connected with the water outlet.

In one embodiment, an electricity-proof wall is arranged at the joint of the water inlet pipe and the water inlet, and an electricity-proof wall is also arranged at the joint of the water outlet pipe and the water outlet.

In one embodiment, the water storage tank body is also provided with a pressure release valve communicated with the cavity of the inner container.

In one embodiment, a check valve is further arranged on the water inlet pipe; the sewage draining port is provided with a detachable filter, and the filter is positioned outside the water storage tank body. The check valve can prevent water in the water storage tank body from flowing back from the water inlet.

In one embodiment, an insulating layer is filled between the outer shell and the inner container.

Compared with the prior art, the beneficial effects are: according to the dry-heating-preventing electric water heater provided by the utility model, whether the water in the water storage tank is lower than a threshold value is judged by utilizing the difference of electric signals generated by whether the exposed end of the electronic anode rod is positioned under the water surface, the principle is simple, the detection is carried out before the water heater is started, the damage to parts in the inner container of the electric water heater is avoided, and the dry-heating-preventing effect is better; the electronic anode bar is arranged at the sewage draining port, so that no opening is required to be added on the inner container, the water leakage risk is reduced, and the cost is saved; in addition, the electronic anode rod can replace a magnesium rod to protect the inner container, the inner container is protected by utilizing the polarization current required by the electronic anode rod to emit the inner container, harmful substances are not generated, water in the inner container can be cleaner, the service life is long, and the inner container basically does not need to be replaced.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Reference numerals: 1. a water storage tank body; 2. a heating element; 3. a controller; 4. a sub-anode control plate; 5. an electronic anode rod; 6. an insulating layer; 7. a sewage draining outlet; 8. a water inlet pipe; 9. a water outlet pipe; 10. an electricity-proof wall; 11. a housing; 12. an inner container.

Detailed Description

The drawings are for illustration purposes only and are not to be construed as limiting the utility model; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationships depicted in the drawings are for illustrative purposes only and are not to be construed as limiting the utility model.

As shown in fig. 1, an anti-dry heating electric water heater comprises a water storage tank 1, a heating element 2 arranged in the tank, and a controller 3 for controlling the heating element 2 to be turned on or off; the water storage tank further comprises a detection module 4 and an electronic anode bar 5 arranged inside the water storage tank body 1, wherein the electronic anode bar 5 is vertically arranged; the lower part of the electronic anode rod 5 is wrapped with an insulating layer 6, and the upper part is exposed; the heating element 2 is positioned below the top end of the insulating layer 6; the electronic anode bar 5 is electrically connected with the detection module 4, and the detection module 4 is electrically connected with the controller 3. The utility model is realized by a detection module and an electronic anode rod 5 arranged in a water storage tank body 1, whether the water in the water storage tank body 1 is lower than a threshold value is judged by utilizing the difference of electric signals generated by whether the exposed end of the electronic anode rod 5 is positioned under the water surface, different electric signals sent by the electronic anode rod 5 are fed back to the detection module 4, the detection module processes the signals and sends the processed signals to a controller 3, and the controller 3 judges whether a heating element 2 is started for heating according to the received different signals. The principle of the scheme is simple, the detection is carried out before the starting, the damage to parts in the inner container 12 of the electric water heater is avoided, and the dry burning prevention effect is better. Wherein the electric signal that sends when the one end that electron anode rod 5 parcel has insulating layer 6 is located the aquatic with the exposed end is different, thereby sets up the minimum of water level through the length value that sets up insulating layer 6 to prevent dry combustion method.

In one embodiment, a sewage draining outlet 7 communicated with the inside of the water storage tank body 1 is arranged at the bottom of the water storage tank body 1, the electronic anode rod 5 is arranged at the sewage draining outlet 7, and one end wrapped with the insulating layer 6 faces the sewage draining outlet. The electronic anode bar 5 is arranged at the sewage draining outlet 7, so that the inner container 12 is not required to be additionally provided with holes, the water leakage risk is reduced, and the cost is saved.

In some embodiments, the top end of the insulating layer 6 of the electron anode rod 5 is located at a horizontal plane at least more than 1cm from the horizontal plane at which the heating element 2 is located.

In one of the embodiments, the electron anode rod 5 is a titanium anode. The titanium anode is adopted to detect signals, so that the influence caused by scale problems is avoided; in addition, the electronic anode rod 5 can also replace a magnesium rod to protect the inner container 12, the service life is long, the inner container 12 is protected by utilizing the polarization current required by the electronic anode rod 5 to emit the inner container 12, harmful substances are not generated, the water in the inner container 12 can be cleaner, the service life is long, and the replacement is basically not needed.

In some embodiments, the water storage tank body 1 comprises a shell 11 and an inner container 12 with a cavity inside, and the shell is wrapped outside the inner container 12; the heating element 2 and the electron anode rod 5 are both positioned in the cavity. The water storage tank body 1 is provided with a water inlet and a water outlet which are communicated with the cavity of the inner container 12, a water inlet pipe 8 is connected with the water inlet, and a water outlet pipe 9 is connected with the water outlet. An electricity-proof wall 10 is arranged at the joint of the water inlet pipe 8 and the water inlet, and an electricity-proof wall 10 is also arranged at the joint of the water outlet pipe 9 and the water outlet.

In one embodiment, a pressure relief valve communicated with the cavity of the inner container 12 is further arranged on the water storage tank body 1.

In another embodiment, a check valve is also arranged on the water inlet pipe 8; a detachable filter is arranged at the sewage outlet 7 and is positioned outside the water storage tank body 1. The check valve can prevent water in the water storage tank body 1 from flowing back from the water inlet.

In one embodiment, an insulating layer is filled between the outer shell 11 and the inner container 12.

The working principle is as follows:

experiments have shown that when a certain metal is immersed in an electrolyte solution, a natural corrosion potential is established between the metal surface and the solution. The potentials of different metals in a certain solution are different, while the potential of the same metal is different due to the heterogeneity of its parts to generate a certain potential difference, and it is this potential difference that causes the electrochemical corrosion of the metal in the electrolyte solution. If a direct current is applied to a metal intended to be immersed in an electrolytic solution, the natural corrosion potential of the metal changes, a phenomenon known as polarization. When the current is positive, the process of the metal acting as an anode and changing the potential to the square is called anodic polarization, and vice versa called cathodic polarization. When the metal with the passivity tendency is subjected to anodic polarization, if the current reaches a sufficient value, a passivation film with high corrosion resistance can be formed on the metal surface, so that the current is reduced, and the metal surface is in a passivity state. This passive state is achieved by continuing to apply a small current, which results in a small amount of passive metal surface dissolution, thereby preventing corrosion of the metal. The utility model utilizes the principle and is provided with the electronic anode rod 5, the anti-corrosion effect of the utility model is better than that of the prior physical anode such as a magnesium rod, and the utility model effectively protects the inner container 12.

In addition, the principle of detecting water level changes by the electron anode rod 5: when the electronic anode rod 5 works, the electronic anode rod is electrically connected with the detection module 4, if the exposed end of the electronic anode rod 5 is contacted with water in the water storage tank body 1, electrochemical reaction can be continuously generated, and a current loop is formed. A certain voltage is correspondingly formed on the electronic anode rod 5, so that the voltage is detected by the detection module 4; if the exposed end of the electronic anode rod 5 is separated from the water surface, the voltage fed back to the detection module 4 by the electronic anode rod 5 can be suddenly changed from high to low or even from high to low, or the current fed back to the detection module 4 by the electronic anode rod 5 can be suddenly changed from high to low or even from high to low, and the detection module 4 judges whether the water level reaches the preset water level or not by detecting two different signals, namely, the large current when the water surface is positioned at the exposed end or the small current when the water surface is positioned at the end of the insulating layer 6, so that the start-up can be controlled.

When the electric water heater is filled with water, the water enters the cavity of the inner container 12 from the water inlet pipe 8, if the water amount is below the preset water level, namely below the horizontal plane where the boundary of the insulating layer 6 wrapped by the electronic anode rod 5 and the exposed end is located, after the electric water heater is powered on, the detection module 4 detects an electric signal sent by the electronic anode rod 5, then the detection module 4 detects the electric signal and generates a corresponding high-level or low-level signal through a processor of the detection module 4 to send to the controller 3, and after receiving the signal, the controller 3 controls the electric water heater not to be started, namely the heating element 2 is not started to heat. If the water injection amount is above the preset liquid level, namely the water level reaches the exposed end of the electronic anode rod 5, after the electric water heater is powered on, the electronic anode rod 5 sends out another electric signal, the detection module 4 detects the electric signal and generates a corresponding low-level or high-level signal through a processor of the detection module 4 to send to the controller 3, the controller 3 controls the electric water heater to be started, and the heating element 2 starts to heat water. In addition, when the water level exceeds the preset liquid level, under the power-on condition, the detection module 4 emits the polarization current required by the protection of the liner 12 through the electronic anode rod 5, so that the liner 12 is protected, the corrosion liner 12 can be placed instead of a magnesium rod, and the used water is cleaner.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the utility model.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (10)

1. An anti-dry heating electric water heater comprises a water storage tank body (1), a heating element (2) arranged in the water storage tank body (1), and a controller (3) for controlling the heating element (2) to be opened or closed; the device is characterized by also comprising a detection module (4) and an electronic anode bar (5) arranged in the water storage tank body (1); the electronic anode bar (5) is vertically arranged; the lower part of the electronic anode rod (5) is wrapped with an insulating layer (6), and the upper part is exposed; the heating element (2) is positioned below the top end of the insulating layer (6); the electronic anode rod (5) is electrically connected with the detection module (4), and the detection module (4) is electrically connected with the controller (3).

2. The dry-heating preventing electric water heater according to claim 1, wherein a drain outlet (7) communicated with the inside of the water storage tank (1) is arranged at the bottom of the water storage tank (1), the electronic anode rod (5) is arranged at the drain outlet (7), and one end wrapped with the insulating layer (6) faces the drain outlet (7).

3. The dry-heating prevention electric water heater according to claim 2, characterized in that the top end of the insulating layer (6) of the electronic anode bar (5) is located at a distance of at least more than 1cm from the horizontal plane of the heating element (2).

4. The dry-heating prevention electric water heater according to claim 2, characterized in that the electronic anode rod (5) is a titanium anode.

5. The dry-heating preventing electric water heater according to any one of claims 2 to 4, characterized in that said water storage tank (1) comprises a casing (11) and a liner (12) having a cavity therein, said casing (11) being wrapped outside said liner (12); the heating element (2) and the electronic anode bar (5) are both positioned in the cavity.

6. The electric water heater for preventing dry heating according to claim 5, characterized in that the water storage tank body (1) is provided with a water inlet and a water outlet which are communicated with the cavity of the inner container (12), the water inlet is connected with a water inlet pipe (8), and the water outlet is connected with a water outlet pipe (9).

7. The electric water heater against dry burning of claim 6, wherein the junction between the water inlet pipe (8) and the water inlet is provided with an electricity-proof wall (10), and the junction between the water outlet pipe (9) and the water outlet is also provided with an electricity-proof wall (10).

8. The dry-heating prevention electric water heater according to claim 5, characterized in that a pressure relief valve communicated with the cavity of the inner container (12) is further provided on the water storage tank body (1).

9. The electric water heater against dry heating of claim 6, characterized in that a check valve is further provided on the water inlet pipe (8); the sewage draining exit (7) is provided with a detachable filter which is positioned outside the water storage tank body (1).

10. The dry-heating prevention electric water heater according to claim 5, characterized in that an insulating layer is filled between the outer shell (11) and the inner container (12).

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