CN112128967A - Electric water heater capable of preventing inner container from being over-pressurized - Google Patents
Electric water heater capable of preventing inner container from being over-pressurized Download PDFInfo
- Publication number
- CN112128967A CN112128967A CN202011039386.9A CN202011039386A CN112128967A CN 112128967 A CN112128967 A CN 112128967A CN 202011039386 A CN202011039386 A CN 202011039386A CN 112128967 A CN112128967 A CN 112128967A
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- Prior art keywords
- water heater
- flange
- electric water
- electric
- liner
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 47
- 238000001514 detection method Methods 0.000 claims abstract description 14
- 238000005485 electric heating Methods 0.000 claims abstract description 4
- 239000002184 metal Substances 0.000 claims description 15
- 238000010438 heat treatment Methods 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 7
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 abstract description 4
- 238000004891 communication Methods 0.000 abstract description 2
- 238000009434 installation Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 3
- 238000004880 explosion Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000003303 reheating Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
- F24H1/18—Water-storage heaters
- F24H1/20—Water-storage heaters with immersed heating elements, e.g. electric elements or furnace tubes
- F24H1/201—Water-storage heaters with immersed heating elements, e.g. electric elements or furnace tubes using electric energy supply
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
- F24H9/2014—Arrangement or mounting of control or safety devices for water heaters using electrical energy supply
- F24H9/2021—Storage heaters
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Resistance Heating (AREA)
Abstract
The invention discloses an electric water heater for preventing the inner container from overlarge pressure, which comprises: the electric heating device comprises a liner, an electric heater, a flange plate and a flange plate pressing plate, wherein the electric heater is fixed with the flange plate, and the flange plate is sealed on a liner opening of the liner and is fixed by the flange plate pressing plate; the alarm device is characterized in that a flange deformation detection device is arranged on the flange and connected with a main controller of the electric water heater, and an alarm prompt device for alarming the overlarge pressure of the inner container is connected to the main controller. Because the too big detection of inner bag pressure is realized through the deformation of judging the ring flange, because main control unit all installs at electric water heater right side maintenance intracavity with ring flange deformation detection device, ring flange deformation detection device is direct to be connected with main control unit, and the communication is more convenient, also need not to change inner bag inner structure, and the installation maintenance is very convenient, and judges the accuracy.
Description
Technical Field
The invention relates to the technical field of electric water heaters, in particular to an electric water heater capable of preventing an inner container from being overlarge in pressure.
Background
In the prior art, the most important pressure relief mode of the water storage type electric water heater is to perform pressure relief, drainage and air release under the condition that the pressure intensity is greater than 0.8MPa by utilizing the working principle of a pressure relief valve so as to prevent the pressure of an inner container from being overlarge. However, when the relief valve is damaged or clogged, the pressure gradually increases as the electric heater of the inner container is repeatedly heated, and there is a risk of serious accidents such as water leakage or explosion. At present, users cannot detect the fault and take correct measures under daily observation or normal use. Under the condition that heating is not stopped in time or pressure is relieved manually, the accident possibility of water leakage or explosion is increased rapidly due to overlarge pressure, and the later such fault is found, the greater the danger is.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide the electric water heater which does not change the internal structure of the liner, is convenient to install and maintain, has accurate judgment and prevents the liner from having overlarge pressure.
In order to achieve the purpose, the invention adopts the following technical scheme.
An electric water heater for preventing the inner container from being over-pressurized comprises: the electric heating device comprises a liner, an electric heater, a flange plate and a flange plate pressing plate, wherein the electric heater is fixed with the flange plate, and the flange plate is sealed on a liner opening of the liner and is fixed by the flange plate pressing plate; the alarm device is characterized in that a flange deformation detection device is arranged on the flange and connected with a main controller of the electric water heater, and an alarm prompt device for alarming the overlarge pressure of the inner container is connected to the main controller.
More preferably, the flange deformation detecting device is a resistance strain gauge, a displacement sensor or a vibration sensor.
More preferably, the flange deformation detection device is connected with the main controller in a wireless connection or signal line connection manner.
More preferably, the alarm prompting device includes one or more of an operation display, a buzzer, a background server and an intelligent terminal.
More preferably, the flange is bowl-shaped, and an outward flange is formed on the periphery of the flange; and a sealing ring is arranged between the flange plate and the liner opening, and the flange plate pressing plate is tightly pressed on the edge of the flange plate and is fixed with the liner through bolts.
More preferably, the resistance strain gauge is composed of two insulating sheets and a grid-shaped metal sheet arranged between the two insulating sheets, and both ends of the grid-shaped metal sheet are connected with the main controller through leads.
More preferably, the method for determining whether the pressure of the inner container is too high by detecting the voltage change at the two ends of the resistance strain gauge comprises the following specific steps: 1) after the electric water heater is installed, the electric water heater is electrified for the first time, and the voltage value Uc of the resistance strain gauge is recorded for the first time; 2) detecting the voltage value Us of the resistance strain gauge at intervals; 3) judging whether Us is equal to Uc; if yes, returning to the step 2); if not, the electric heater is stopped from heating, and an alarm instruction is sent to the alarm prompting device.
More preferably, in step 2), the period of time is 0.5 to 1.5 hours.
More preferably, in step 3), the voltage values Us and Uc have an error range, and no alarm command is issued within the error range; or, there is a time length threshold when the voltage values Us and Uc are unequal, and the alarm instruction is sent only when the time length of the voltage values Us and Uc is unequal exceeds the time length threshold.
More preferably, in step 3), after the heating of the electric heater is stopped, the operation display of the electric water heater is kept inoperable.
The invention has the beneficial effects that:
when the electric water heater provided by the invention detects that the pressure of the inner container is too high, a user is prompted to overhaul, the relay is automatically switched off to stop the electric heater to heat, an important source that the pressure of the inner container continuously rises is cut off, and the safety is good; simultaneously, because the too big detection of inner bag pressure is realized through the deformation of judging the ring flange, because main control unit all installs at electric water heater right side maintenance intracavity with ring flange deformation detection device, ring flange deformation detection device is direct to be connected with main control unit, and the communication is more convenient, also need not to change inner bag inner structure, and installation maintenance is very convenient, and judges the accuracy.
And secondly, whether the pressure value is too large is judged by detecting the deformation of the flange plate through a resistance strain gauge, the application is simple and convenient, the actual operation is simple, and the cost is low. In addition, when the electric heater is disconnected due to overlarge pressure of the inner container, the main controller keeps the operation display incapable of being operated, so that the phenomenon that the pressure of the inner container is increased by reheating due to the fact that a user operates in a mess is effectively avoided, and the safety is better.
Drawings
Fig. 1 is a schematic structural diagram of an electric water heater provided by the present invention.
Fig. 2 is a schematic structural view of the electrothermal heater in fig. 1.
Fig. 3 is a schematic structural diagram of a resistance strain gauge.
Fig. 4 is a control schematic diagram of the electric water heater provided by the invention.
Fig. 5 is a schematic structural view of the flange after deformation.
Fig. 6 is a flowchart illustrating the operation of the electric water heater according to the present invention.
Description of reference numerals:
1: inner container, 2: electric heater, 3: flange plate, 4: flange plate, 5: a resistance strain gauge,
6: main controller, 7: an alarm prompting device.
5-1: insulating sheet, 5-2: grid-shaped metal sheet, 5-3: and (7) leading wires.
Detailed Description
In the description of the present invention, it should be noted that, for the terms of orientation, such as "central", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., it indicates that the orientation and positional relationship shown in the drawings are based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated without limiting the specific scope of protection of the present invention.
Furthermore, if the terms "first" and "second" are used for descriptive purposes only, they are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features. Thus, a definition of "a first" or "a second" feature may explicitly or implicitly include one or more of the feature, and in the description of the invention, "at least" means one or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly specified or limited, the terms "assembled", "connected", and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; or may be a mechanical connection; the two elements can be directly connected or connected through an intermediate medium, and the two elements can be communicated with each other. The specific meanings of the above terms in the present invention can be understood by those of ordinary skill in the art according to specific situations.
In the present invention, unless otherwise specified and limited, "above" or "below" a first feature may include the first and second features being in direct contact, and may also include the first and second features not being in direct contact but being in contact with each other through another feature therebetween. Also, the first feature being "above," "below," and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply an elevation which indicates a level of the first feature being higher than an elevation of the second feature. The first feature being "above", "below" and "beneath" the second feature includes the first feature being directly below or obliquely below the second feature, or merely means that the first feature is at a lower level than the second feature.
The following describes the embodiments of the present invention with reference to the drawings of the specification, so that the technical solutions and the advantages thereof are more clear and clear. The embodiments described below are exemplary and are intended to be illustrative of the invention, but are not to be construed as limiting the invention.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
As shown in fig. 1-4, an electric water heater for preventing the inner container from being over-pressurized comprises: the electric heating device comprises a liner 1, an electric heater 2, a flange 3 and a flange pressing plate 4, wherein the electric heater 2 is fixed with the flange 3, and the flange 3 is sealed on a liner opening of the liner 1 and fixed by the flange pressing plate 4; the electric water heater is characterized in that the flange plate 3 is provided with a resistance strain gauge 5, the resistance strain gauge 5 is connected with a main controller 6 of the electric water heater, and the main controller 6 is connected with an alarm prompting device 7 for alarming when the pressure of the inner container is too high. The connection mode of the resistance strain gauge 5 and the main controller 6 can be wireless connection or signal line connection.
In the embodiment, the flange 3 is bowl-shaped, and an outward flange is formed on the periphery of the flange 3; and a sealing ring is arranged between the flange plate 3 and the liner opening, and the flange plate pressing plate 4 is tightly pressed on the edge of the flange plate 3 and is fixed with the liner 1 through bolts. Therefore, the bottom of the flange 3 is suspended from the flange pressing plate 4, and the flange 3 has enough deformation space when the pressure of the inner container is overlarge.
Referring to fig. 3 again, the resistance strain gauge 5 comprises an insulating sheet 5-1 and a grid-shaped metal sheet 5-2 disposed on the insulating sheet 5-1, and both ends of the grid-shaped metal sheet 5-2 are connected to the main controller 6 through leads 5-3. During actual operation, whether the pressure of the inner container is overlarge is judged by detecting the voltage change at the two ends of the resistance strain gauge 5. In this embodiment, the main controller 6 is preferably a single chip, and the design of the peripheral circuit on the main controller 6 for detecting the resistance change of the resistance strain gauge 5 is common technical knowledge known to those skilled in the art and will not be described herein.
The electric water heater provided by the embodiment for preventing the inner container from being overlarge in pressure has the working principle that: because the inner container of the water storage type electric water heater is an integral cylinder, the pressure is uniform, the pressure intensity in unit area is small, and the whole body is not easy to deform. However, the flange 3 installed at the mouth of the bladder is smaller in unit area due to its smaller diameter, and is subjected to a greater pressure under the same pressure. Therefore, after the pressure generated by heating in the inner container exceeds the stress limit of the metal of the flange 3, the outward convex metal deformation can occur, as shown in fig. 5.
When the flange 3 continues to deform, the gap between the sealing ring and the flange 3 becomes larger and larger, and water leakage at the opening of the container is easy to occur; the deformation position of the flange plate 3 does not affect the sealing effect of the sealing ring, the inner container is always in a sealing state, and the serious accident of complete machine explosion can occur after the pressure reaches a certain degree.
Under the condition of general use, the flange 3 of the electric heater 2 is a metal smooth plane, and the flange 3 is actually changed in shape due to the outward bulge phenomenon caused by the excessive pressure. Therefore, the present embodiment measures whether the flange 3 is deformed or not by using the resistance strain gauge 5. The main detection mechanism of the resistance strain gauge 5 is that a grid-shaped metal sheet is fully distributed inside, if the shape is not changed, the resistance value is not changed, and the current value obtained after power-on or the voltage value obtained after voltage drop is fixed. And the resistance value is changed due to the change of the length or the cross section area of the deformed metal sheet, and the detected current value or the voltage value after voltage drop is changed after the voltage or the current with the same condition is passed. The surface of the resistance strain gage 5 is provided with two insulating sheets 5-1 which can be tightly attached to the surface of metal, and as long as the shape of the metal is changed, the metal sheet in the resistance strain gage 5 is also changed correspondingly. The current or voltage values before and after can be measured through the inconsistent resistance values caused by the change, so that whether the shape of the flange plate 3 is changed due to the overlarge pressure of the inner container is judged by comparison.
As shown in fig. 6, a specific method for determining whether the inner container pressure is excessive is: 1) after the electric water heater is installed, the electric water heater is electrified for the first time, and the voltage value Uc of the resistance strain gauge is recorded for the first time; 2) detecting the voltage value Us of the resistance strain gauge every other one hour; 3) judging whether Us is equal to Uc; if yes, returning to the step 2); if not, the heating of the electric heater is stopped, and an alarm instruction is sent to the alarm prompting device 7.
Of course, in step 2), the time interval may be adjusted as appropriate according to different actual needs, for example, to 0.5 hour, 1.5 hours, and so on.
In step 3), the voltage values Us and Uc may have an error range, and no alarm command is issued within the error range. Or, there are time length thresholds, such as 15s, 30s, 60s, etc., when the voltage values Us, Uc are not equal, the alarm command is issued only when the time length of the voltage values Us, Uc is not equal exceeds the time length threshold. Therefore, false alarm caused by voltage and current fluctuation can be better avoided.
In this embodiment, the alarm prompting device 7 is an operation display of the electric water heater, an alarm prompting module is arranged on the operation display, and when an alarm instruction is received, the alarm prompting module displays a text prompt and an icon flickers. As a conversion implementation manner of this embodiment, the alarm prompting device may further include a buzzer, a background server, an intelligent terminal APP, and the like, which are connected to the main controller.
In addition, when the electric heater 5 is turned off due to an excessive inner container pressure, the main controller 6 keeps the operation display from being operated, so as to prevent the user from increasing the inner container pressure due to reheating caused by an operation disorder.
As a variation of this embodiment, the resistance strain gauge 5 is replaced by other flange deformation detection devices such as a displacement sensor and a vibration sensor, which can achieve similar technical effects of the present invention, and will not be described herein again.
It will be appreciated by those skilled in the art from the foregoing description of construction and principles that the invention is not limited to the specific embodiments described above, and that modifications and substitutions based on the teachings of the art may be made without departing from the scope of the invention as defined by the appended claims and their equivalents. The details not described in the detailed description are prior art or common general knowledge.
Claims (10)
1. An electric water heater for preventing the inner container from being over-pressurized comprises: the electric heating device comprises a liner, an electric heater, a flange plate and a flange plate pressing plate, wherein the electric heater is fixed with the flange plate, and the flange plate is sealed on a liner opening of the liner and is fixed by the flange plate pressing plate; the alarm device is characterized in that a flange deformation detection device is arranged on the flange and connected with a main controller of the electric water heater, and an alarm prompt device for alarming the overlarge pressure of the inner container is connected to the main controller.
2. The electric water heater for preventing the liner from having excessive pressure according to claim 1, wherein the flange deformation detection device is a resistance strain gauge, a displacement sensor or a vibration sensor.
3. The electric water heater capable of preventing the inner container from being under the overlarge pressure as claimed in claim 1, wherein the flange deformation detection device is connected with the main controller in a wireless connection or a signal wire connection manner.
4. The electric water heater capable of preventing the inner container from being over-pressurized according to claim 1, wherein the alarm prompting device comprises one or more of an operation display, a buzzer, a background server and an intelligent terminal.
5. The electric water heater for preventing the liner from being over-pressurized as claimed in claim 1, wherein the flange is bowl-shaped, and a flange is formed on the periphery of the flange; and a sealing ring is arranged between the flange plate and the liner opening, and the flange plate pressing plate is tightly pressed on the edge of the flange plate and is fixed with the liner through bolts.
6. The electric water heater according to claim 2, wherein the resistance strain gauge is composed of two insulating sheets and a grid-shaped metal sheet arranged between the two insulating sheets, and both ends of the grid-shaped metal sheet are connected with the main controller through leads.
7. The electric water heater according to claim 6, wherein the electric water heater is configured to detect a voltage change across the resistance strain gauge to determine whether the inner pressure is too high, and the specific determination method is: 1) after the electric water heater is installed, the electric water heater is electrified for the first time, and the voltage value Uc of the resistance strain gauge is recorded for the first time; 2) detecting the voltage value Us of the resistance strain gauge at intervals; 3) judging whether Us is equal to Uc; if yes, returning to the step 2); if not, the electric heater is stopped from heating, and an alarm instruction is sent to the alarm prompting device.
8. The electric water heater of claim 7, wherein the period of time is 0.5-1.5 hours in step 2).
9. The electric water heater for preventing the liner pressure from being too high as claimed in claim 7, wherein in the step 3), the voltage values Us and Uc have an error range, and no alarm command is issued in the error range; or, there is a time length threshold when the voltage values Us and Uc are unequal, and the alarm instruction is sent only when the time length of the voltage values Us and Uc is unequal exceeds the time length threshold.
10. The electric water heater of claim 7, wherein the operation display of the electric water heater is kept inoperable after the electric heater stops heating in step 3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011039386.9A CN112128967A (en) | 2020-09-28 | 2020-09-28 | Electric water heater capable of preventing inner container from being over-pressurized |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011039386.9A CN112128967A (en) | 2020-09-28 | 2020-09-28 | Electric water heater capable of preventing inner container from being over-pressurized |
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| Publication Number | Publication Date |
|---|---|
| CN112128967A true CN112128967A (en) | 2020-12-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011039386.9A Pending CN112128967A (en) | 2020-09-28 | 2020-09-28 | Electric water heater capable of preventing inner container from being over-pressurized |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010078276A (en) * | 2008-09-29 | 2010-04-08 | Panasonic Corp | Hot water storage tank |
| CN201652767U (en) * | 2010-02-22 | 2010-11-24 | 佛山市高明万和电气有限公司 | Electric water heater |
| CN103216941A (en) * | 2013-04-12 | 2013-07-24 | 蒋浩 | Heating pipe connection structure of electrical water heater |
| CN106440373A (en) * | 2016-10-31 | 2017-02-22 | 济南丰源塑料有限公司 | Single-flange inner container for water heater |
| CN110425745A (en) * | 2019-07-25 | 2019-11-08 | 芜湖美的厨卫电器制造有限公司 | Method, apparatus and water heater for water heater |
| CN213578082U (en) * | 2020-09-28 | 2021-06-29 | 广东万家乐燃气具有限公司 | Electric water heater capable of preventing inner container from being over-pressurized |
-
2020
- 2020-09-28 CN CN202011039386.9A patent/CN112128967A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010078276A (en) * | 2008-09-29 | 2010-04-08 | Panasonic Corp | Hot water storage tank |
| CN201652767U (en) * | 2010-02-22 | 2010-11-24 | 佛山市高明万和电气有限公司 | Electric water heater |
| CN103216941A (en) * | 2013-04-12 | 2013-07-24 | 蒋浩 | Heating pipe connection structure of electrical water heater |
| CN106440373A (en) * | 2016-10-31 | 2017-02-22 | 济南丰源塑料有限公司 | Single-flange inner container for water heater |
| CN110425745A (en) * | 2019-07-25 | 2019-11-08 | 芜湖美的厨卫电器制造有限公司 | Method, apparatus and water heater for water heater |
| CN213578082U (en) * | 2020-09-28 | 2021-06-29 | 广东万家乐燃气具有限公司 | Electric water heater capable of preventing inner container from being over-pressurized |
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