CN206459363U - A kind of electric heater water outlet automatically powers off safety guard and electric heater - Google Patents
A kind of electric heater water outlet automatically powers off safety guard and electric heater Download PDFInfo
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- CN206459363U CN206459363U CN201720013551.0U CN201720013551U CN206459363U CN 206459363 U CN206459363 U CN 206459363U CN 201720013551 U CN201720013551 U CN 201720013551U CN 206459363 U CN206459363 U CN 206459363U
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- electric heater
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Abstract
The utility model belongs to the technical field of water heater, more particularly to a kind of electric heater water outlet automatically powers off safety guard and electric heater；The technical scheme used for：Including：Master controller, signal adapter, water-flow signal detection means and can auto switching three extremely break earth leakage protective devices; described three extremely disconnected earth leakage protective devices are arranged on input live wire, zero line and the ground wire of electric heater; the output end of the water-flow signal detection means is electrically connected by the input of the signal adapter and the master controller, and the control signal output of the master controller is electrically connected with described three control signal inputs for extremely breaking earth leakage protective device；The utility model is applied to field of water heaters.
Description
Technical field
The utility model belongs to the technical field of water heater, more particularly to a kind of electric heater water outlet automatically powers off safe guarantor
Protection unit and electric heater.
Background technology
Electric heater is a kind of water heater heated using electricity as the energy, to ensure using safety, it will usually in electricity
Earth leakage protective control system is set on water heater, to realize that water outlet is powered off.Existing earth leakage protective control system includes water-carrying capacity
Sensor and electronic control circuit, when water flow sensor detects user's water, the automatically controlled system acquisition analysis current of water heater
Signal is measured, the power-off of electrothermal tube is controlled by electronic control circuit, it is ensured that during user's water, will not be because electrothermal tube leaks electricity and touches
Electricity.But it is due to that leakage protecting plug, electric-control system etc. are still powered, so electric heater still has electric leakage, electric shock
Possibility, it is impossible to user's water safety is completely secured.
Utility model content
The utility model overcomes the shortcomings of that prior art is present, and technical problem to be solved is：There is provided one kind can control
Electric heater processed is integrally powered off, and a kind of electric heater water outlet so that user's water safety is completely secured automatically powers off safeguard protection dress
Put and electric heater.
In order to solve the above-mentioned technical problem, the technical solution adopted in the utility model is：A kind of electric heater water outlet is automatic
Power cut-off safety protector, including：Master controller, signal adapter, water-flow signal detection means and can auto switching three poles
Disconnected earth leakage protective device, described three extremely disconnected earth leakage protective devices are arranged on input live wire, zero line and the ground wire of electric heater, the water
The output end for flowing signal supervisory instrument is electrically connected by the input of the signal adapter and the master controller, the master
The control signal output of controller is electrically connected with described three control signal inputs for extremely breaking earth leakage protective device.
Preferably, the water-flow signal detection means is arranged on water inlet or the water outlet of electric heater, the water
Stream signal supervisory instrument is water flow sensing unit, or is water flow switch, or is current valve.
Correspondingly, a kind of electric heater, including above-mentioned electric heater water outlet automatically power off safety guard.
Preferably, the electric heater also includes：Standby power supply module, display control module and display screen, it is described standby
Power module is bi-directionally connected with the master controller, the output end of the master controller and the input of the display control module
Electrical connection, the output end of the display control module and the input of the display screen are electrically connected.
Preferably, multiple first temperature sensors, described multiple first temperature sensors are provided with the electric heater
Output end be electrically connected respectively with the input of the master controller.
Preferably, the electric heater also includes：Wireless communication module, the wireless communication module and the master controller
It is bi-directionally connected, the output end of the master controller and the input of projection arrangement are electrically connected, and the projection arrangement is arranged on institute
State on electric heater.
Preferably, second temperature sensor and heat abstractor, the second temperature sensing are additionally provided with the projection arrangement
The output end of device and the input of the master controller are electrically connected, the output end of the master controller and the heat abstractor
Input is electrically connected.
Preferably, warning device, the input of the warning device and the main control are additionally provided with the electric heater
The output end electrical connection of device.
Preferably, camera device, the output end of the camera device and the master are provided with the inner bag of the electric heater
The input electrical connection of controller.
Preferably, the outermost layer of the electric heater is provided with layer of plastic film.
The utility model has the advantages that compared with prior art：
1st, three extremely disconnected earth leakage protective devices are arranged on input live wire, zero line and the ground wire of electric heater, water-flow signal detection
Device detects the water-flow signal of electric heater in real time, and sends master controller to by signal adapter, and master controller is according to water
Stream signal come control three extremely break earth leakage protective devices action, three extremely break earth leakage protective devices according to the control signal of master controller come pair
Input live wire, zero line and the ground wire of electric heater carry out break-make, so as to realize that the water outlet of electric heater is automatically powered off, it is ensured that user
With safety during water, after user stops using water, the water-flow signal that master controller is detected according to water-flow signal detection means leads to
Cross the three earth leakage protective devices control electric heaters that extremely break to automatically reset upper electricity, water heater is recovered normal work；When user's water,
The utility model can not only power off electrothermal tube, and three three poles (live wire, zero line, ground wire) for extremely breaking earth leakage protective device can be made to break
Open so that electric heater is integrally powered off, prevented electric leakage, the possibility got an electric shock, user's water safety is completely secured.
2nd, the electric heater in the utility model may also include standby power supply module, display control module and display screen, when
Three extremely break earth leakage protective device Operating In Persistent Current Mode when, main power source is charged by master controller to standby power supply module, when three extremely disconnected
During earth leakage protective device disconnection work, main power source is disconnected, and standby power supply module is supplied to master controller and other operational modules
Electricity, both ensure that the water safety of user, in turn ensure that the normal operation of other functional modules of electric heater.
3rd, the electric heater in the utility model, it is interior provided with the first temperature sensor, first temperature sensor
Quantity can be multiple；Because electric heater is that waterside is used on side, in general, the water temperature in electric heater be it is upper it is cold under
Hot, skewness, the temperature only set shown by a temperature sensor is imprecise, easily misleads user, causes user to make
Hot water runs out of and is forced to interrupt situation about using and happens occasionally during；This programme is provided with multiple first in electric heater
Temperature sensor, described multiple first temperature sensors detect water temperature in real time, and water temperature signal is sent to master controller, main
Controller is handled and analyzed to the water temperature signal received, is shown and is controlled according to final analysis result, greatly
It is big to improve display and control performance.
4th, can be set on the electric heater in the utility model has projection arrangement, and user is in the process using electric heater
In, TV signal or vision signal, projection dress described in main controller controls can be received by master controller and wireless communication module
Put and video pictures are projected on metope, so that user can watch TV programme, video when using electric heater
Deng making full use of the times such as bathing.
5th, in the utility model, second temperature sensor and heat abstractor, described can be set on the projection arrangement
Two temperature sensors detect the temperature in use of projection arrangement in real time, when temperature is too high, and main controller controls heat abstractor is to throwing
Image device is radiated, and ensure projection arrangement uses safety, extends its service life；In addition, can also be set on electric heater
Warning device is put, when the temperature in use of projection arrangement exceedes certain threshold value, main controller controls warning device is alarmed,
User is reminded to close projection arrangement in time or take projection arrangement certain cooling measure.
6th, camera device can be provided with the inner bag of the electric heater in the utility model, by the camera device, can be clapped
Dirt in the depth of situation about taking the photograph in electric heater, such as water, the operation conditions of content part, internal environment, camera device
The picture photographed can be displayed on the display screen of electric heater, and user or maintenance personal can be straight without taking electric heater apart
The situation it was observed that inside water heater is connect, whether accurately judge that needs to carry out water, renewal part or to water heater inside
Progress such as cleans at the action.
7th, the shell of existing electric heater is mostly metal shell, and water heater generally all can be with electricity during use
Source is connected so that metal shell is also powered, therefore, and user is the presence of certain Danger Electric shock risk if imprudence is encountered；
And the outermost layer of electric heater is provided with layer of plastic film in the utility model, because plastics have good electrical insulating property
Can, so as to avoid because dangerous caused by outer casing electrification, further, since eliminating metal or plastic casing, greatly reduce
The generation manufacturing cost of electric heater.
Brief description of the drawings
The utility model is described in more detail below in conjunction with the accompanying drawings.
Fig. 1 is the knot that a kind of electric heater water outlet that the utility model embodiment one is provided automatically powers off safety guard
Structure schematic diagram；
Fig. 2 is a kind of structural representation for electric heater that the utility model embodiment one is provided；
Fig. 3 is a kind of structural representation for electric heater that the utility model embodiment two is provided；
Fig. 4 is a kind of structural representation for electric heater that the utility model embodiment three is provided；
A kind of structural representation for electric heater that Fig. 5 provides for the utility model example IV；
Fig. 6 is a kind of structural representation for electric heater that the utility model embodiment five is provided；
Fig. 7 is a kind of structural representation for electric heater that the utility model embodiment six is provided；
The workflow signal that a kind of water outlet for electric heater that Fig. 8 provides for the utility model embodiment one is automatically powered off
Figure；
In figure：101 be master controller, and 102 be signal adapter, and 103 be water-flow signal detection means, and 104 be three extremely disconnected
Earth leakage protective device, 105 be standby power supply module, and 106 be display control module, and 107 be display screen, and 108 be the first TEMP
Device, 109 be wireless communication module, and 110 be projection arrangement, and 111 be second temperature sensor, and 112 be heat abstractor, and 113 be report
Alarm device, 114 be camera device.
Embodiment
It is new below in conjunction with this practicality to make the purpose, technical scheme and advantage of the utility model embodiment clearer
Accompanying drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that retouched
The embodiment stated is a part of embodiment of the present utility model, rather than whole embodiments；Based on the reality in the utility model
Example is applied, the every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made all belongs to
The scope protected in the utility model.
Fig. 1 is the knot that a kind of electric heater water outlet that the utility model embodiment one is provided automatically powers off safety guard
Structure schematic diagram, as shown in figure 1, a kind of electric heater water outlet automatically powers off safety guard, including：Master controller 101, signal
Converter 102, water-flow signal detection means 103 and can auto switching three extremely break earth leakage protective devices 104, described three extremely break electric leakage
Protector 104 is arranged on input live wire, zero line and the ground wire of electric heater, the output of the water-flow signal detection means 103
End is electrically connected by the input of the signal adapter 102 and the master controller 101, the control of the master controller 101
Signal output part processed is electrically connected with described three control signal inputs for extremely breaking earth leakage protective device 104.
Further, the water-flow signal detection means 103 is arranged on water inlet or the water outlet of electric heater, institute
Water-flow signal detection means 103 is stated for water flow sensing unit, or is water flow switch, or is current valve.
In the present embodiment, water-flow signal detection means 103 detects the water-flow signal of electric heater in real time, and passes through signal turn
Parallel operation 102 sends master controller 101 to, and master controller 101 controls the dynamic of three extremely disconnected earth leakage protective devices 104 according to water-flow signal
Make, three extremely break earth leakage protective devices 104 according to the control signal of master controller 101 come to the input live wire of electric heater, zero line and
Ground wire carries out break-make, so as to realize that the water outlet of electric heater is automatically powered off, it is ensured that safety during user's water, when user stops using
After water, the water-flow signal that master controller 101 is detected according to water-flow signal detection means 103 passes through three extremely disconnected earth leakage protective devices
104 control electric heaters automatically reset upper electricity, water heater is recovered normal work；When user's water, the present embodiment can not only
Electrothermal tube is powered off, and can disconnect three three poles (live wire, zero line, ground wire) for extremely breaking earth leakage protective device 104 so that electric hot water
Device is integrally powered off, and has prevented electric leakage, the possibility got an electric shock, user's water safety is completely secured.
Fig. 2 is a kind of structural representation for electric heater that the utility model embodiment one is provided, as shown in Fig. 2 a kind of
Electric heater, including above-mentioned electric heater water outlet automatically power off safety guard.
Further, the electric heater may also include：Standby power supply module 105, display control module 106 and display screen
107, the standby power supply module 105 is bi-directionally connected with the master controller 101, the output end of the master controller 101 and institute
State the input electrical connection of display control module 106, the output end of the display control module 106 and the display screen 107
Input electrical connection.
In the present embodiment, when three extremely disconnected 104 Operating In Persistent Current Modes of earth leakage protective device, main power source is by master controller 101 to standby
Charged with power module 105, when three extremely disconnected earth leakage protective devices 104 disconnect work, main power source is disconnected, stand-by power supply mould
Block 105 is powered to master controller 101 and other operational modules, both ensure that the water safety of user, in turn ensure that electric heating
The normal operation of other functional modules of hydrophone.
Fig. 3 is a kind of structural representation for electric heater that the utility model embodiment two is provided, as shown in figure 3, in reality
Apply on the basis of example one, multiple first temperature sensors 108 can be provided with the electric heater, described multiple first temperature are passed
The output end of sensor 108 is electrically connected with the input of the master controller 101 respectively.
Because electric heater is that waterside is used on side, in general, the water temperature in electric heater is upper cold and lower heat, distribution
Uneven, the temperature only set shown by a temperature sensor is imprecise, easily misleads user, causes user in use
Hot water runs out of and is forced to interrupt situation about using and happens occasionally；The present embodiment is passed in electric heater provided with multiple first temperature
Sensor 108, described multiple first temperature sensors 108 detection water temperature, and water temperature signal is sent to master controller in real time
101,101 pairs of water temperature signals received of master controller are handled and analyzed, and are shown according to final analysis result
And control, substantially increase display and control performance.
Fig. 4 is a kind of structural representation for electric heater that the utility model embodiment three is provided, as shown in figure 4, in reality
Apply on the basis of example one, the electric heater may also include：Wireless communication module 109, the wireless communication module 109 with it is described
Master controller 101 is bi-directionally connected, and the output end of the master controller 101 is electrically connected with the input of projection arrangement 110, described
Projection arrangement 110 is arranged on the electric heater.
Specifically, the wireless communication module 109 can be bluetooth module, or WIFI module, or Zigbee moulds
Block.
Specifically, the projection arrangement 110 can be made up of water proof and dust proof material.
More specifically, the projection lens of the projection arrangement 110 are provided with demister.
User can receive TV during using electric heater by master controller 101 and wireless communication module 109
Signal or vision signal, master controller 101 control the projection arrangement 110 to project video pictures on metope, thereby using
Family can watch TV programme, video etc. when using electric heater, make full use of the times such as bathing.
The structural representation for a kind of electric heater that Fig. 5 provides for the utility model example IV, as shown in figure 5, in reality
On the basis of applying example three, second temperature sensor 111 and heat abstractor 112 can be also provided with the projection arrangement 110, described the
The input of the output end of two temperature sensors 111 and the master controller 101 is electrically connected, the master controller 101 it is defeated
Go out end and the input of the heat abstractor 112 is electrically connected.
Specifically, the heat abstractor 112 can be liquid cooling heat radiator.
In the present embodiment, the second temperature sensor 111 detects the temperature in use of projection arrangement 110 in real time, works as temperature
When too high, the control heat abstractor 112 of master controller 101 radiates to projection arrangement 110, ensures the use of projection arrangement 110
Safety, extends its service life.
Fig. 6 is a kind of structural representation for electric heater that the utility model embodiment five is provided, as shown in fig. 6, in reality
Apply on the basis of example four, warning device 113, the input of the warning device 113 and institute can be also provided with the electric heater
State the output end electrical connection of master controller 101.
When the temperature in use of projection arrangement 110 exceedes certain threshold value, the control warning device 113 of master controller 101 enters
Row alarm, reminds user to close projection arrangement 110 in time or take projection arrangement 110 certain cooling measure.
Fig. 7 is a kind of structural representation for electric heater that the utility model embodiment six is provided, as shown in fig. 7, in reality
Apply on the basis of example two, camera device 114, the output end of the camera device 114 can be provided with the inner bag of the electric heater
It is electrically connected with the input of the master controller 101.
By the camera device 114, the situation in electric heater, the depth of such as water, the operation of content part can be shot
Dirt in situation, internal environment etc., the picture that camera device 114 is photographed can be displayed on the display screen 107 of electric heater,
User or maintenance personal can observe directly the situation inside water heater without taking electric heater apart, accurately judge that whether
Need to carry out water, renewal part or water heater inside is carried out the action such as to clean.
In addition, layer of plastic film can be provided with by stating on the outermost layer of electric heater.
The shell of existing electric heater is mostly metal shell, and water heater generally all can be with power supply during use
Connection so that metal shell is also powered, therefore, user is the presence of certain Danger Electric shock risk if imprudence is encountered；And
The outermost layer of electric heater is provided with layer of plastic film in the utility model, because plastics have good electrical insulation capability,
So as to avoid because dangerous caused by outer casing electrification, further, since eliminating metal or plastic casing, electric heating is greatly reduced
The generation manufacturing cost of hydrophone.
The workflow signal that a kind of water outlet for electric heater that Fig. 8 provides for the utility model embodiment one is automatically powered off
Figure, as shown in figure 8, the electric heater follows the steps below work：
S101, electric heater water filling.
S102, electric heater work on power.
S103, water-flow signal detection means have detected whether water-flow signal, in this way, perform step S104, otherwise, return to step
Rapid S102.
S104, master controller receive and analyze water-flow signal, export logic control signal.
Three poles (live wire, zero line, ground wire) of the extremely disconnected earth leakage protective device of S105, three disconnect.
S106, electric heater power-off are stopped.
A kind of electric heater water outlet that the utility model is provided automatically powers off safety guard and electric heater, no matter electric
Whether water heater is powered and can perceive user and use water behavior, and accurately control three extremely break earth leakage protective devices 104 three poles disconnect and
Closure, so as to control the break-make of three poles (live wire, zero line, ground wire) of electric heater input power, is realized in user's water, three
Three extremely automatic disconnections of extremely disconnected earth leakage protective device 104, it is ensured that user's bathing safety, when user stops using water, three, which extremely break, leaks
The extremely automatic closure of the three of non-electricity protector 104, electric heater continues electrified regulation, safer, intelligent, reliable body is brought to user
Effect is tested, with very big practicality, and substantive distinguishing features and progress.
Finally it should be noted that：Various embodiments above is only limited to illustrate the technical solution of the utility model, rather than to it
System；Although the utility model is described in detail with reference to foregoing embodiments, one of ordinary skill in the art should
Understand：It can still modify to the technical scheme described in foregoing embodiments, or to which part or whole
Technical characteristic carries out equivalent substitution；And these modifications or replacement, the essence of appropriate technical solution is departed from this practicality newly
The scope of each embodiment technical scheme of type.
Claims (10)
1. a kind of electric heater water outlet automatically powers off safety guard, it is characterised in that：Including：Master controller (101), signal
Converter (102), water-flow signal detection means (103) and can auto switching three extremely break earth leakage protective devices (104), three pole
Disconnected earth leakage protective device (104) is arranged on input live wire, zero line and the ground wire of electric heater, the water-flow signal detection means
(103) output end is electrically connected by the input of the signal adapter (102) and the master controller (101), described
The control signal output of master controller (101) and the control signal input of described three extremely disconnected earth leakage protective devices (104) are electric
Connection.
2. a kind of electric heater water outlet according to claim 1 automatically powers off safety guard, it is characterised in that：It is described
Water-flow signal detection means (103) is arranged on water inlet or the water outlet of electric heater, the water-flow signal detection means
(103) it is water flow sensing unit, or is water flow switch, or is current valve.
3. a kind of electric heater, it is characterised in that：It is automatic including any described electric heater water outlet of the claims 1 to 2
Power cut-off safety protector.
4. a kind of electric heater according to claim 3, it is characterised in that：Also include：It is standby power supply module (105), aobvious
Show control module (106) and display screen (107), the standby power supply module (105) and the master controller (101) two-way company
Connect, the output end of the master controller (101) is electrically connected with the input of the display control module (106), the display
The output end of control module (106) is electrically connected with the input of the display screen (107).
5. a kind of electric heater according to claim 4, it is characterised in that：Provided with the multiple first temperature in the electric heater
Spend sensor (108), the output ends of described multiple first temperature sensors (108) respectively with the master controller (101)
Input is electrically connected.
6. a kind of electric heater according to claim 3, it is characterised in that：Also include：Wireless communication module (109), institute
State wireless communication module (109) to be bi-directionally connected with the master controller (101), the output end of the master controller (101) and throwing
The input electrical connection of image device (110), the projection arrangement (110) is arranged on the electric heater.
7. a kind of electric heater according to claim 6, it is characterised in that：Is additionally provided with the projection arrangement (110)
Two temperature sensors (111) and heat abstractor (112), output end and the main control of the second temperature sensor (111)
The input electrical connection of device (101), the output end of the master controller (101) and the input of the heat abstractor (112)
Electrical connection.
8. a kind of electric heater according to claim 7, it is characterised in that：Warning device is additionally provided with the electric heater
(113), the output end of the input of the warning device (113) and the master controller (101) is electrically connected.
9. a kind of electric heater according to claim 4, it is characterised in that：Provided with shooting in the inner bag of the electric heater
Device (114), the output end of the camera device (114) is electrically connected with the input of the master controller (101).
10. a kind of electric heater according to claim 3, it is characterised in that：The outermost layer of the electric heater is provided with
Layer of plastic film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720013551.0U CN206459363U (en) | 2017-01-06 | 2017-01-06 | A kind of electric heater water outlet automatically powers off safety guard and electric heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720013551.0U CN206459363U (en) | 2017-01-06 | 2017-01-06 | A kind of electric heater water outlet automatically powers off safety guard and electric heater |
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| Publication Number | Publication Date |
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| CN206459363U true CN206459363U (en) | 2017-09-01 |
Family
ID=59695687
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| Application Number | Title | Priority Date | Filing Date |
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| CN201720013551.0U Expired - Fee Related CN206459363U (en) | 2017-01-06 | 2017-01-06 | A kind of electric heater water outlet automatically powers off safety guard and electric heater |
Country Status (1)
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108224789A (en) * | 2018-02-10 | 2018-06-29 | 佛山市顺德区澳骏电子科技有限公司 | A kind of control system of electric water heater |
| CN108899990A (en) * | 2018-05-15 | 2018-11-27 | 芜湖美的厨卫电器制造有限公司 | The method of water heater and control water heater power supply |
| CN109028597A (en) * | 2018-05-15 | 2018-12-18 | 芜湖美的厨卫电器制造有限公司 | The method of water heater and control water heater power supply |
| CN109028596A (en) * | 2018-05-15 | 2018-12-18 | 芜湖美的厨卫电器制造有限公司 | For controlling the method and water heater of water heater |
| CN109269122A (en) * | 2018-12-03 | 2019-01-25 | 李汉中 | A kind of low-power battery accumulation of energy low pressure electric instant-heating type constant temperature water outlet electric water heater system |
| CN109709614A (en) * | 2019-02-25 | 2019-05-03 | 安徽瑞迪工程科技有限公司 | The method of three pole precise measurement refuse landfill geomembranes infiltration hole |
| CN109945506A (en) * | 2019-03-29 | 2019-06-28 | 广东万博电气有限公司 | A kind of electric heater with water outlet power down function |
-
2017
- 2017-01-06 CN CN201720013551.0U patent/CN206459363U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108224789A (en) * | 2018-02-10 | 2018-06-29 | 佛山市顺德区澳骏电子科技有限公司 | A kind of control system of electric water heater |
| CN108899990A (en) * | 2018-05-15 | 2018-11-27 | 芜湖美的厨卫电器制造有限公司 | The method of water heater and control water heater power supply |
| CN109028597A (en) * | 2018-05-15 | 2018-12-18 | 芜湖美的厨卫电器制造有限公司 | The method of water heater and control water heater power supply |
| CN109028596A (en) * | 2018-05-15 | 2018-12-18 | 芜湖美的厨卫电器制造有限公司 | For controlling the method and water heater of water heater |
| CN109269122A (en) * | 2018-12-03 | 2019-01-25 | 李汉中 | A kind of low-power battery accumulation of energy low pressure electric instant-heating type constant temperature water outlet electric water heater system |
| CN109709614A (en) * | 2019-02-25 | 2019-05-03 | 安徽瑞迪工程科技有限公司 | The method of three pole precise measurement refuse landfill geomembranes infiltration hole |
| CN109709614B (en) * | 2019-02-25 | 2020-09-04 | 安徽瑞迪工程科技有限公司 | Method for accurately measuring geomembrane permeation holes of refuse landfill by three poles |
| CN109945506A (en) * | 2019-03-29 | 2019-06-28 | 广东万博电气有限公司 | A kind of electric heater with water outlet power down function |
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