CN2136423Y

CN2136423Y - Electric water heater

Info

Publication number: CN2136423Y
Application number: CN 92216982
Authority: CN
Inventors: 赵普信
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-09-12
Filing date: 1992-09-12
Publication date: 1993-06-16
Anticipated expiration: 2002-09-12

Abstract

The utility model provides an electric water heater with the function of cutting off power by the flowing water. The utility model is characterized in that a reed pipe is arranged under a magnetic float, an added control circuit and a heating main circuit are connected in parallel, the control circuit is formed by the concatenation of the reed pipe and a relay, a power rectifier supplies power, and the normally closed contact of the relay is connected into the main circuit in series. When the utility model is used, the magnetic float descends to approach to the reed pipe following the descending of the water level. The reed pipe is switched on under the action of the magnetic field to switch on the control circuit and switch off the normally closed contact in the main circuit, and then the utility model works under the condition that the power is switched off. The utility model which has the advantages of safety and reliability is suitable for serving as a water heater of shower.

Description

Electric water heater

The utility model belongs to a kind of electric heater.

The applicant has applied for " a kind of electric heater " utility model patent on May 30th, 92 to Patent Office of the People's Republic of China, and application number is 92216073.2, and this water heater mainly is made up of water tank and the heating that is positioned at water tank bottom.During use power switch is opened, major loop is connected, and the heating heating heats up the water in the water tank, opens discharge outlet again, for people's shower.Obviously, the power supply of this moment is opened, and promptly this electric heater is charged work, and dangerous suspicion is arranged.

The purpose of this utility model provides a kind of electric heater with auto-power-off device, and water is once the delivery port that flows out water tank, and it can cut off the power supply automatically.

The technical solution of the utility model is on the basis of 92216073.2 technical schemes at application number, has increased following technical characterictic:

1, fix a movable chamber at tank wall, the magnetic float is arranged in the chamber, the magnetic float is made up of float and magnet, and magnet places in the float, and the equal up and down opening in movable chamber is communicated with water tank, and tongue tube is placed on the bottom between movable chamber and the tank wall.

2, increase control loop, in parallel with the heating major loop, control loop is made up of rectifier power source, tongue tube and two DC relays, after two relay parallel connections, connect with tongue tube, the normally closed node of two relays seals in the two ends of major loop heating respectively.

Operation principle is: when shower, water flows out from delivery port, and water level descends in the case, and the magnetic float descends thereupon, near tongue tube, tongue tube is closed under the effect of magnetic field, and control loop is connected, and two relays get, two normally-closed contacts that drive them disconnect, cut off major loop, so the utility model can be cut off the electricity supply automatically when the flowing water shower; Close delivery port, water level rises in the case, and the magnetic float also rises thereupon, away from tongue tube, magnetic field is ineffective, and tongue tube recovers reset condition again, promptly be off-state, cut off control loop, the relay power down recovers reset condition, normally-closed contact is closed, connect major loop, heating element heater continues feedwater heats, and finishes one-period.

The utility model is that 92216073.2 technology are compared with application number, has increased the flowing water breaker device, when using the utility model, can cut off the power supply automatically, and unsafe factor has thoroughly been eliminated in not charged work.

Further specify the utility model below in conjunction with accompanying drawing.

Fig. 1 is the utility model partial structurtes schematic diagrames.

Fig. 2 is the utility model electrical schematic diagram.

Referring to Fig. 1, fix a movable chamber 2 at water tank wall 1, the magnetic float is made up of float 3 and magnet 4, and magnet places in the float, and float is made of plastic, and the equal up and down opening in movable chamber is communicated with water tank, and tongue tube 5 is placed on the bottom between movable chamber and the tank wall.The 6th, delivery port.

Referring to Fig. 2, increase control loop, in parallel with the heating major loop, control loop is made up of rectifier power source, tongue tube hole and two DC relay J1, J2, after J1 and the J2 parallel connection, connects with tongue tube, the normally closed node of J1 and J2 seals in the two ends of major loop heating R respectively.At the two ends of heating, the neon bulb of incorporating into is used for the major loop break-make and shows.

Claims

1, a kind of electric heater is made up of water tank and heating major loop, it is characterized in that:

(1), fix a movable chamber, the magnetic float is arranged in the chamber, the magnetic float is made up of float and magnet, and magnet places in the float, and movable chamber is equal openings up and down, are communicated with water tank, and tongue tube is placed on the bottom between movable chamber and the tank wall at tank wall;

(2), increase control loop, in parallel with the heating major loop, control loop is made up of rectifier power source, tongue tube and two DC relays, after two relay parallel connections, connect with tongue tube, the normally closed node of two relays seals in the two ends of major loop heating respectively.