CN207395210U - A kind of control system of electric water heater with temperature sensor fault detection - Google Patents
A kind of control system of electric water heater with temperature sensor fault detection Download PDFInfo
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- CN207395210U CN207395210U CN201721295847.2U CN201721295847U CN207395210U CN 207395210 U CN207395210 U CN 207395210U CN 201721295847 U CN201721295847 U CN 201721295847U CN 207395210 U CN207395210 U CN 207395210U
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- temperature sensor
- control system
- water heater
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- microcontroller
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- 238000001514 detection method Methods 0.000 title claims abstract description 41
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 36
- 230000005611 electricity Effects 0.000 claims description 4
- 239000000523 sample Substances 0.000 abstract description 4
- 238000010438 heat treatment Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 238000009841 combustion method Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
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Abstract
The utility model discloses a kind of control system of electric water heater with temperature sensor fault detection, including：Control system of electric water heater and temperature sensor detection circuit；The control system of electric water heater includes microcontroller, the thermal circuit beraker being connected with microcontroller, relay and temperature sensor；The temperature sensor detection circuit is connected to I/O mouthfuls of the power supply of microcontroller and detects I/O mouthfuls between the thermistor of temperature sensor；Microcontroller gives I/O mouthfuls of high level of power supply after the power is turned on, temperature sensor detection circuit is made to be powered, electric current is used for reading the voltage on thermistor through thermistor to GND, I/O mouthfuls of the detection, and microcontroller converses temperature value with detection temperature sensor fault according to the voltage value detected.In the case that the constant failure of temp probe resistance value occurs in temperature sensor, control system of electric water heater disconnects the electric heater of electric heater, ensures the safety of user.
Description
Technical field
The utility model is related to electric heater technical field more particularly to a kind of control system of electric water heater.
Background technology
Existing electric heater connected by comparing temperature value and the setting value of liner temperature sensor as electric heater and
The condition of disconnection.When the temperature value for occurring detecting is higher or lower, control system can provide corresponding warning.Such as：Electric heating
During hydrophone dry combustion method, according to temperature rising curve, screen reports E2；When electric heater temperature sensor open circuit or short circuit, screen report
E3；When overtemperature failure occurs in electric heater, i.e., liner temperature T1 >=90 DEG C, screen report E4 to represent overtemperature failure；
But if temperature sensor occur the constant failure of resistance value or temperature sensor installation malposition when, then
Control system of electric water heater can not accurately read liner water temperature.At this moment, if the temperature value≤set that temperature sensor fault measures
When constant temperature is spent, electric heater is always in heated condition, and there are security risks.
Utility model content
For problems of the prior art, the purpose of this utility model is to provide a kind of band temperature sensor faults
The control system of electric water heater of detection function, in the case that there is the constant failure of temp probe resistance value in temperature sensor, electricity
Water heater control system disconnects the electric heater of electric heater, ensures the safety of user.
To achieve the above objectives, the utility model adopts the following technical solution.
A kind of control system of electric water heater with temperature sensor fault detection, which is characterized in that including：Electric heater control
System processed and temperature sensor detection circuit；The control system of electric water heater includes microcontroller, and the heat being connected with microcontroller is broken
Road device, the first relay, the second relay and temperature sensor, the thermal circuit beraker are connected in the supply line of electric heater
For controlling the break-make of electric heater power supply, first relay and the second relay are used for controlling the electrical heating of electric heater
Device works, and the temperature sensor is used for detecting inner container of electric water heater water temperature；The temperature sensor detection circuit is connected to list
I/O mouthfuls of I/O mouthfuls of the power supply of piece machine and detection are between the thermistor of temperature sensor；Microcontroller gives I/O mouthfuls of power supply after the power is turned on
High level makes temperature sensor detection circuit be powered, and electric current is used for reading temperature-sensitive through thermistor to GND, I/O mouthfuls of the detection
Ohmically voltage；The microcontroller converses temperature value according to the voltage value detected.
As a further illustration of the above scheme, the temperature sensor detection circuit includes：Resistance R1, resistance R2, electricity
Holding C1 and capacitance C2, resistance R1, resistance R2 are connected to I/O mouthfuls of power supply, I/O mouthfuls of detection between one end of thermistor,
And the end of thermistor is grounded by capacitance C1, the other end of thermistor is connected for I/O mouthfuls by capacitance C2 with detection.
As a further illustration of the above scheme, the control system of electric water heater includes the display being connected with microcontroller
Device.
As a further illustration of the above scheme, the control system of electric water heater includes the master control being connected with microcontroller
Plate is connected with electric heater control button on master control borad.
The beneficial effects of the utility model are：
Judge whether temperature sensor breaks down by the voltage at detection temperature sensor thermistor both ends, work as temperature
When degree sensor, which breaks down, causes resistance value constant or temp probe installation site is incorrect, control system of electric water heater control
Electric heater is stopped and warning reminding user fixes a breakdown in time, ensures the safety of user.
Description of the drawings：
Fig. 1 show control system of electric water heater structure diagram provided by the utility model.
Fig. 2 show the temp probe connection circuit diagram of microcontroller and temperature sensor.
Reference sign：
1：Microcontroller, 2：Thermal circuit beraker, 3：First relay, 4：Second relay, 5：Temperature sensor, 6：Electrical heating
Device.
Specific embodiment
In the utility model, except as otherwise clear stipulaties and restriction, if any term " assembling ", " connected ", " connection " term
It should go to understand as broad sense, for example, it may be being fixedly connected or being detachably connected or be integrally connected；It can also be machine
Tool connects；It can be directly connected or be connected by intermediary, can be connected inside two elements.For
For those of ordinary skill in the art, it can understand that specific in the utility model of above-mentioned term containing as the case may be
Justice.
In utility model, unless otherwise prescribed and limit, fisrt feature second feature it " on " or it " under " can be with
It is contacted directly including the first and second features, it is not to contact directly but pass through it that can also include fisrt feature and second feature
Between other characterisation contact.Moreover, fisrt feature second feature " on ", " under " and " above " include fisrt feature
Directly over second feature and oblique upper or be only to represent that fisrt feature level height is higher than the height of second feature.First
Feature second feature " on ", " under " and " below " include fisrt feature immediately below second feature or obliquely downward or only
Only represent that fisrt feature level height is less than second feature.
With reference to the attached drawing of specification, by being further described to specific embodiment of the present utility model, make
The technical solution of the utility model and its advantage are clearer, clear and definite.It is to show to describe embodiment below with reference to attached drawing
Example property, it is intended to explain the utility model, and it is not intended that limitation to the utility model.
As shown in Figure 1 and Figure 2, a kind of control system of electric water heater with temperature sensor fault detection, including：Electric hot water
Device control system and temperature sensor detection circuit.
Wherein, the control system of electric water heater include microcontroller 1, the thermal circuit beraker 2, first being connected with microcontroller 1 after
Electric appliance 3, the second relay 4 and temperature sensor 5, the thermal circuit beraker 2, which is connected in the supply line of electric heater, to be used for controlling
The break-make of electric heater power supply processed, 3 and second relay 4 of the first relay are used for controlling the electric heater 6 of electric heater
Work, the temperature sensor 5 are used for detecting inner container of electric water heater water temperature.
The temperature sensor detection circuit is connected to I/O mouthfuls of power supply and detection I/O mouthfuls and the temperature sensor of microcontroller 1
Thermistor between.Microcontroller 1 to I/O mouthfuls of high level of power supply, makes temperature sensor detection circuit be powered after the power is turned on, electric current warp
Thermistor is described to detect I/O mouthfuls for reading the voltage on thermistor to GND；Microcontroller is according to the voltage value detected
Converse temperature value.
Specifically, the temperature sensor detection circuit includes：Resistance R1, resistance R2, capacitance C1 and capacitance C2, resistance
R1, resistance R2 are connected to I/O mouthfuls of power supply, I/O mouthfuls of detection between one end of thermistor, and the end of thermistor leads to
Capacitance C1 ground connection is crossed, the other end of thermistor is connected for I/O mouthfuls by capacitance C2 with detection.
In actual work, the temperature for electric heater being contained in microcontroller memory rises slope range value.When electric heater normally adds
When hot, the temperature rise curve of liner is often linear preferable straight line, thus, the higher value in the slope range value is according to specific electricity
The different routine experiments that carry out are available to the heating power of water heater with liner volume.With the use of electric heater, electrical heating
Device surface can grow incrustation scale, influence electric heater heat dissipation, ultimately result in extending heating time, and slope declines, the slope range value
In smaller value be slope decline limiting value, also can be by testing or being manually set.
When electric heater is in running order, as long as meeting any one in following two conditions, microcontroller is just controlled
Electric heater processed is stopped, to ensure the safe to use of electric heater.
1) microcontroller detects a temperature value at regular intervals, obtains multiple times-temperature coordinate points, and adjacent two sit
Punctuate obtains a temperature rate of rise, calculates the average value of the temperature rate of rise；If the average value of the temperature rate of rise falls
It is risen in temperature outside slope range value, then electric heater is controlled to be stopped.
2) the limit time value of 1 DEG C of the temperature liter of electric heater is contained in microcontroller memory；If electric heater operation duration
Time oversteps the extreme limit time value, and electric heater water temperature temperature rises not up to 1 DEG C, then electric heater is controlled to be stopped, and is reminded
User temperature sensor breaks down.
In the present embodiment, the interval time of adjacent twice-temperature coordinate points is 15 seconds, calculates the temperature rate of rise
During average value, microcontroller continued detection time not less than 10 minutes.Herein, by taking the average value of the temperature rate of rise and setting
Fixed longer temperature rises detection time, is addressed temperature rebound, ensures the accuracy that temperature judges.In other embodiment
In, the interval time of adjacent twice-temperature coordinate points arbitrarily adjusted in 10-60 seconds, was not limited to the present embodiment.
Further, the control system of electric water heater includes the display and master control borad that are connected with microcontroller 1, in master control borad
On be connected with electric heater control button, artificially to change electric heater working condition.
The essence of the utility model is described in detail in more than specific embodiment, but can not be come with this to this reality
It is limited with new protection domain.It should be evident that under the enlightenment of the utility model in essence, the common skill of the art
Art personnel can also carry out many improvement and modification, it should be noted that these improvement and modification all fall the power in the utility model
Within the scope of profit is claimed.
Claims (4)
1. a kind of control system of electric water heater with temperature sensor fault detection, which is characterized in that including：Electric heater controls
System and temperature sensor detection circuit；The control system of electric water heater includes microcontroller, the thermal cut-out being connected with microcontroller
Device, the first relay, the second relay and temperature sensor, the thermal circuit beraker are connected in the supply line of electric heater and use
Control the break-make of electric heater power supply, first relay and the second relay are used for controlling the electric heater of electric heater
Work, the temperature sensor are used for detecting inner container of electric water heater water temperature；The temperature sensor detection circuit is connected to monolithic
I/O mouthfuls of I/O mouthfuls of the power supply of machine and detection are between the thermistor of temperature sensor；Microcontroller is I/O mouthfuls high to power supply after the power is turned on
Level makes temperature sensor detection circuit be powered, and electric current is used for reading temperature-sensitive electricity through thermistor to GND, I/O mouthfuls of the detection
Voltage in resistance；The microcontroller converses temperature value according to the voltage value detected.
2. a kind of control system of electric water heater with temperature sensor fault detection according to claim 1, feature exist
In the temperature sensor detection circuit includes：Resistance R1, resistance R2, capacitance C1 and capacitance C2, resistance R1, resistance R2 difference
I/O mouthfuls of power supply, I/O mouthfuls of detection are connected between one end of thermistor, and the end of thermistor is grounded by capacitance C1,
The other end of thermistor is connected for I/O mouthfuls by capacitance C2 with detection.
3. a kind of control system of electric water heater with temperature sensor fault detection according to claim 1, feature exist
In the control system of electric water heater includes the display being connected with microcontroller.
4. a kind of control system of electric water heater with temperature sensor fault detection according to claim 1, feature exist
In the control system of electric water heater includes the master control borad being connected with microcontroller, and electric heater control is connected on master control borad
Button.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721295847.2U CN207395210U (en) | 2017-10-10 | 2017-10-10 | A kind of control system of electric water heater with temperature sensor fault detection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721295847.2U CN207395210U (en) | 2017-10-10 | 2017-10-10 | A kind of control system of electric water heater with temperature sensor fault detection |
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| Publication Number | Publication Date |
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| CN207395210U true CN207395210U (en) | 2018-05-22 |
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| CN201721295847.2U Expired - Fee Related CN207395210U (en) | 2017-10-10 | 2017-10-10 | A kind of control system of electric water heater with temperature sensor fault detection |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107606800A (en) * | 2017-10-10 | 2018-01-19 | 广东万家乐燃气具有限公司 | A kind of control system of electric water heater with temperature sensor fault detection |
| CN109724205A (en) * | 2018-12-25 | 2019-05-07 | 新奥数能科技有限公司 | A method of the electric heating tube temp probe of installation air-conditioning |
| CN113357823A (en) * | 2021-06-07 | 2021-09-07 | 珠海格力电器股份有限公司 | Water heater water tank temperature compensation method and device, storage medium and water heater |
| CN113551370A (en) * | 2021-07-12 | 2021-10-26 | 珠海格力电器股份有限公司 | Dry burning detection method of air conditioner and air conditioner |
| TWI751539B (en) * | 2019-05-17 | 2022-01-01 | 日商阿自倍爾股份有限公司 | Temperature regulator and abnormal judgment method |
-
2017
- 2017-10-10 CN CN201721295847.2U patent/CN207395210U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107606800A (en) * | 2017-10-10 | 2018-01-19 | 广东万家乐燃气具有限公司 | A kind of control system of electric water heater with temperature sensor fault detection |
| CN109724205A (en) * | 2018-12-25 | 2019-05-07 | 新奥数能科技有限公司 | A method of the electric heating tube temp probe of installation air-conditioning |
| CN109724205B (en) * | 2018-12-25 | 2021-03-02 | 新奥数能科技有限公司 | Method for installing temperature probe of electric heating pipe of air conditioner |
| TWI751539B (en) * | 2019-05-17 | 2022-01-01 | 日商阿自倍爾股份有限公司 | Temperature regulator and abnormal judgment method |
| CN113357823A (en) * | 2021-06-07 | 2021-09-07 | 珠海格力电器股份有限公司 | Water heater water tank temperature compensation method and device, storage medium and water heater |
| CN113357823B (en) * | 2021-06-07 | 2022-03-15 | 珠海格力电器股份有限公司 | Water heater water tank temperature compensation method and device, storage medium and water heater |
| CN113551370A (en) * | 2021-07-12 | 2021-10-26 | 珠海格力电器股份有限公司 | Dry burning detection method of air conditioner and air conditioner |
| CN113551370B (en) * | 2021-07-12 | 2022-07-26 | 珠海格力电器股份有限公司 | Dry burning detection method of air conditioner and air conditioner |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180522 |