CN201181411Y - Safety power-off controller of electric water heater - Google Patents

Safety power-off controller of electric water heater Download PDF

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Publication number
CN201181411Y
CN201181411Y CNU2008200201782U CN200820020178U CN201181411Y CN 201181411 Y CN201181411 Y CN 201181411Y CN U2008200201782 U CNU2008200201782 U CN U2008200201782U CN 200820020178 U CN200820020178 U CN 200820020178U CN 201181411 Y CN201181411 Y CN 201181411Y
Authority
CN
China
Prior art keywords
electric heater
controller
state relay
solid
water heater
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CNU2008200201782U
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Chinese (zh)
Inventor
单昕
Original Assignee
单昕
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 单昕 filed Critical 单昕
Priority to CNU2008200201782U priority Critical patent/CN201181411Y/en
Application granted granted Critical
Publication of CN201181411Y publication Critical patent/CN201181411Y/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model discloses a safety control device for an electric water heater, particularly to a safety power off controller for an electric water heater, which comprises a master controller, a solid-state relay and a water flow sensor arranged in a water outlet passage of the electric water heater, wherein the master controller comprises an operation amplifier comparator with the input end thereof connected with the water flow sensor and the output end thereof connected with the base electrode of a NPN triode D, and the collector electrode of the triode is connected with the control end negative terminal of the solid-state relay for controlling the power supply on-off of the electric water heater. The safety power off controller has low cost and can automatically power off the electric water heater if water flow flows out from the water outlet of the electric water heater, so as to effectively protect a user.

Description

Electric heater safety circuit breaking controller
(1) technical field
The utility model relates to a kind of electric heater safety control, especially relates to a kind of electric heater safety circuit breaking controller.
(2) background technology
Electric heater has been come into huge numbers of families as a kind of electrical equipment commonly used, safety problem in its use, also just day by day become the focus that people pay close attention to, the electric heater new standard is with the lay special stress on safety problem of leaking electricity, and safety standard, performance standard, 3 motions of installation specification enter the review stage.Electric leakage is that this safety problem compares distinct issues at present when wherein having a bath.On the electric leakage reason, mainly contain the power lead electric leakage, the heating tube insulating property are bad, imperfect earth etc.When people open the effluent switch of water heater, just might cause personal injury.People mainly add electricity-preventing wall device for solving the electric leakage problem, but its cost is than higher.Also have a kind of water heater that provides with safe voltage, but low excessively voltage adds thermal effect, and transformer need be set, also increased cost.For the common electrical water heater, generally be that the user pulls out attaching plug in use, it is loaded down with trivial details doing one like this, the 2nd, if forget, still can be dangerous.People also can select to install earth leakage protective device, but the earth leakage protective device insufficient sensitivity, that is to say in the moment of electric leakage in time to cut off the power supply, and equally also can cause danger.
(3) summary of the invention
The utility model causes electric leakage to hurt sb.'s feelings at electric heater easily, hurts sb.'s feelings though perhaps can solve electric leakage, and defect of high cost provides a kind of and can effectively avoid electric leakage to hurt sb.'s feelings, and the lower electric heater safety circuit breaking controller of cost.
The technical solution adopted in the utility model is:
The utility model electric heater safety circuit breaking controller, comprise controller, solid-state relay and be located at the water flow sensing unit that electric heater goes out water passage, wherein master controller comprises the computing amplifier comparator that input end links to each other with above-mentioned water flow sensing unit, its output terminal is connected to NPN type triode D base stage through resistance R, this transistor collector is connected to above-mentioned solid-state relay control end negative terminal, is used to control the electric heater on/off.
Above-mentioned electric heater safety circuit breaking controller, described controller also comprises transformer T and rectifier bridge D1, power supply is the controller power supply through above-mentioned two devices; Wherein the transformer prime also is connected to above-mentioned solid-state relay voltage input end, and the solid-state relay output terminal then joins with the feed circuit of electric heater.
Above-mentioned electric heater safety circuit breaking controller is characterized in that: the electric heater main circuit is connected with time-delay double-pole list and casts aside pass K, and this time-delay double-pole list is cast aside to close and is controlled by described solid-state relay.
The utility model electric heater safety circuit breaking controller, be provided with the water flow sensing unit that the monitoring electric heater goes out water passage water outlet situation, if current are arranged, then can signal, amplify through the computing amplifier comparator, the action of control solid-state relay, solid-state relay is then controlled the action of electric heater main circuit switch, thereby outage can not damage the user automatically.Even if not being cut off also, power supply can not influence use.The utility model adopts components and parts such as the cheap computing comparison amplifier of price comparison, rectifier bridge, electric capacity, resistance, and cost is lower, and is easy to utilize.
(4) description of drawings
Fig. 1 is the utility model electric heater safety circuit breaking controller theory diagram.
Fig. 2 is the utility model embodiment electrical schematic.
(5) embodiment
Specify technical scheme below in conjunction with Figure of description utility model:
With reference to the attached Fig. 1 and 2 of explanation, the utility model electric heater safety circuit breaking controller, comprise controller, solid-state relay and be located at the water flow sensing unit that electric heater goes out water passage, wherein master controller comprises the computing amplifier comparator that input end links to each other with above-mentioned water flow sensing unit, its output terminal is connected to NPN type triode D base stage through resistance R, this transistor collector is connected to above-mentioned solid-state relay control end negative terminal, is used to control the electric heater on/off.
Described controller also comprises transformer T and rectifier bridge D1, and power supply is the controller power supply through above-mentioned two devices; Wherein the transformer prime also is connected to above-mentioned solid-state relay voltage input end, and the solid-state relay output terminal then joins with the feed circuit of electric heater.Thereby by solid-state relay the electric heater power supply is controlled, solid-state relay can be provided with delay time, such as the time-delay pass of opening or delay time.The electric heater main circuit is connected with time-delay double-pole list and casts aside pass K, and this time-delay double-pole list is cast aside to close and is controlled by described solid-state relay.

Claims (3)

1. electric heater safety circuit breaking controller, it is characterized in that: comprise controller, solid-state relay and be located at the water flow sensing unit that electric heater goes out water passage, wherein master controller comprises the computing amplifier comparator that input end links to each other with above-mentioned water flow sensing unit, its output terminal is connected to NPN type triode D base stage through resistance R, this transistor collector is connected to above-mentioned solid-state relay control end negative terminal, is used to control the electric heater on/off.
2. electric heater safety circuit breaking controller according to claim 1 is characterized in that: described controller also comprises transformer T and rectifier bridge D1, and power supply is the controller power supply through above-mentioned two devices; Wherein the transformer prime also is connected to above-mentioned solid-state relay voltage input end, and the solid-state relay output terminal then joins with the feed circuit of electric heater.
3. electric heater safety circuit breaking controller according to claim 1 and 2 is characterized in that: the electric heater main circuit is connected with time-delay double-pole list and casts aside pass K, and this time-delay double-pole list is cast aside to close and is controlled by described solid-state relay.
CNU2008200201782U 2008-04-07 2008-04-07 Safety power-off controller of electric water heater Expired - Fee Related CN201181411Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNU2008200201782U CN201181411Y (en) 2008-04-07 2008-04-07 Safety power-off controller of electric water heater

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNU2008200201782U CN201181411Y (en) 2008-04-07 2008-04-07 Safety power-off controller of electric water heater

Publications (1)

Publication Number Publication Date
CN201181411Y true CN201181411Y (en) 2009-01-14

Family

ID=40250909

Family Applications (1)

Application Number Title Priority Date Filing Date
CNU2008200201782U Expired - Fee Related CN201181411Y (en) 2008-04-07 2008-04-07 Safety power-off controller of electric water heater

Country Status (1)

Country Link
CN (1) CN201181411Y (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102944070A (en) * 2012-12-12 2013-02-27 王娇 Automatic power-off protection device for water heater
CN104764188A (en) * 2015-03-31 2015-07-08 芜湖美的厨卫电器制造有限公司 Water heater and heating control method thereof
CN104990273A (en) * 2015-07-21 2015-10-21 晋江市永铭电子科技有限公司 Buckle type water heater protection device with wireless sensing cutoff function

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102944070A (en) * 2012-12-12 2013-02-27 王娇 Automatic power-off protection device for water heater
CN104764188A (en) * 2015-03-31 2015-07-08 芜湖美的厨卫电器制造有限公司 Water heater and heating control method thereof
CN104990273A (en) * 2015-07-21 2015-10-21 晋江市永铭电子科技有限公司 Buckle type water heater protection device with wireless sensing cutoff function

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Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
C17 Cessation of patent right
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20090114

Termination date: 20100407