CN2438058Y

CN2438058Y - Water boiling heater

Info

Publication number: CN2438058Y
Application number: CN 00247569
Authority: CN
Inventors: 王树礼
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-09-11
Filing date: 2000-09-11
Publication date: 2001-07-04
Anticipated expiration: 2010-09-11

Abstract

The utility model relates to an electric heating water boiling heater which comprises a water tank with a water inlet and a water outlet, a heating tube arranged in the water tank, a high and low water lever sensor, and a temperature sensor, wherein, the water inlet is provided with a water inlet electromagnetic valve, a control circuit is connected with the heating tube, sensors, and the water inlet electromagnetic valve, and the temperature sensor and the heating tuber are both positioned under the water outlet. The utility model is only provided with the heating tube and eliminates a heat insulating tube, and thereby, the utility model has the advantages of simple structure and low cost; in addition, the heating tube and the temperature sensor are arranged under the water outlet, which can control the heating tube to work in time according to the detected temperature condition and ensure that the water in the water tank is boiling water so that the purpose of sterilization can be achieved.

Description

Boiler

The utility model is a kind of electricallly heated water boiling vessels.

Existing boiler generally has heating tube and insulating tube, not only structure is comparatively complicated, cost is higher, and when temperature was lower than certain setting value, heating tube could start wherein water is heated, but when water level hangs down, magnetic valve is water inlet automatically just, and wherein temperature is often still on design temperature after the water inlet, and at this moment, heating tube can not heat, and the water in the water tank is the mixed liquor of unboiled water and boiling water, thereby can not reach the requirement of sterilization.

The purpose of this utility model is: design a kind of simple in structure, with low cost, boiler that Disinfection Effect is good.

The utility model comprises the water tank that has intake-outlet and is installed in water tank interior heating tube, high low water level sensor and temperature sensor, the water inlet is equipped with entering water electromagnetic valve, and having control circuit to be connected with heating tube, each sensor and entering water electromagnetic valve, temperature sensor and heating tube all are positioned at the delivery port below.

Heating tube only has been installed in the utility model, and removed insulating tube, thereby it is simple in structure, cost is lower, in addition, heating tube and temperature sensor are installed in the below of delivery port, can in time control heating tube work according to detected temperature conditions, guarantee that the water in the water tank is boiling water, thereby reach the purpose of sterilization.

Said control circuit comprises transformer and the regulator rectifier circuit that is attached thereto, the output termination main control circuit of regulator rectifier circuit, the output control entering water electromagnetic valve of this circuit, heating tube, and its input is connected with temperature sensing circuit and height water level detection circuit, the height water level detection circuit is connected to the output of transformer, utilize the height water level detection circuit of Alternating Current Power Supply, make it can not be split into current potential, thereby prevent the water tank fouling.

It is the central control circuit of core that above-mentioned main control circuit can adopt with CPU, also can adopt the circuit of other version, as: said main control circuit comprises output, three NAND gate U2A that input connects successively, U2B, U2C, a nor gate U3A and two NAND gate U1A, first branch road that U1B constitutes, U2A wherein, U2C, two input parallel connections of U1A, the output of this branch road connects transistor amplifier by resistance R 12, the output of amplifying circuit and the output of regulator rectifier circuit tap into the control end of water solenoid valve, and have diode E6 to be connected between the two ends, be connected to the input of this branch road behind the low water level sensor series diode E5; Output termination second branch road of temperature sensor, it comprises the NAND gate U5C that comparator U4A and two inputs are connected with comparator U4A output by resistance, the vacant input of the output termination NAND gate U2B of NAND gate U5C and the input of nor gate U3B, the input of the output termination U3C of U3B, node between U2A and the U2B connects two inputs of NAND gate U2D, another input of its output termination U3C; NAND gate U1C, the U1D of the output termination input parallel connection two series connection, separately of U3C and resistance R 13 backs connect the relay J 2 of control heating tube by drive circuit; Connect the 3rd branch road behind the high water level sensor series diode E4, this branch road comprises two NAND gate U5A and U5B, connects two inputs of U5B behind the output series diode E10 of U5A, and connects the vacant input of nor gate U3A in first branch road.

Under foregoing circuit control, after the utility model powers up, if cistern water level is lower than low water line, control circuit detects this signal, and control heating relay normally open contact disconnects the heating tube no-voltage, do not heat with anti-dry this moment, controls the entering water electromagnetic valve action simultaneously, begins water inlet.When water level rises to low water level, control circuit detects signal, into water of control entering water electromagnetic valve outage stopping, control simultaneously adds electrothermal relay connection heating tube and begins heating, carrying out along with heating process, water temperature rises gradually, when water temperature reaches design temperature, control circuit control entering water electromagnetic valve action beginning water inlet, the water temperature that enters with cold water is reduced to design temperature, and control circuit is controlled entering water electromagnetic valve again and stopped into water, continues heating, when water level did not reach the high water level of setting, this process circulation was carried out.

For preventing the maloperation of circuit, can pass through resistance R 7 and swept resistance RW1 ground connection at the output of comparator U4A, make the action of relay that be arranged certain lag time.

Below in conjunction with accompanying drawing embodiment of the present utility model is elaborated.

Fig. 1 is the cutaway view of the utility model embodiment;

Fig. 2 is the block diagram of present embodiment control circuit;

Fig. 3 is the line map of present embodiment control circuit;

Wherein, 1-control circuit, 2-power line, 3-water inlet pipe, 4-entering water electromagnetic valve, 5-water tank, 6-heating tube, 7-temperature sensor, 8-outlet pipe, 9-overflow pipe.

As shown in the figure, present embodiment comprises the water tank 5 that has water inlet pipe 3, outlet pipe 8 and is installed in high low water level sensor, temperature sensor 7 and heating tube 6 in the water tank 5, on the water inlet pipe 3 of water tank 5, entering water electromagnetic valve 4 is housed, and heating tube 6, temperature sensor 7 are installed in the below of water tank 5 outlet pipes 6, have a control circuit 1 to be connected with each sensor, entering water electromagnetic valve 4 and heating tube 6.This control circuit 1 comprises transformer, regulator rectifier circuit and the main control circuit that is connected with electrothermal tube 6, each sensor and entering water electromagnetic valve 4.Main control circuit comprises three NAND gate U2A, U2B, U2C, a nor gate U3A and two first branch roads that NAND gate U1A, U1B constitute that output, input connect successively, wherein two of U2A, U2C, U1A input parallel connections, the output of this branch road connects transistor amplifier by resistance R 12, the output of amplifying circuit and the output of regulator rectifier circuit tap into the control end of water solenoid valve 4, and have diode E6 to be connected between the two ends; Be connected to the input of this branch road behind the low water level sensor series diode E5.Output termination second branch road of temperature sensor 7, it comprises the NAND gate U5C that comparator U4A and two inputs are connected with comparator U4A output by resistance, the vacant input of the output termination NAND gate U2B of NAND gate U5C and the input of nor gate U3B, the input of the output termination U3C of U3B, node between U2A and the U2B connects two inputs of NAND gate U2D, another input of its output termination U3C; NAND gate U1C, the U1D of the output termination input parallel connection two series connection, separately of U3C and resistance R 13 backs connect the relay J 2 of control heating tube 6 by drive circuit.Connect the 3rd branch road behind the high water level sensor series diode E4, this branch road comprises two NAND gate U5A and U5B, connects two inputs of U5B behind the output series diode E10 of U5A, and connects the vacant input of nor gate U3A in first branch road.

Claims

1, a kind of boiler, comprise the water tank (5) that has intake-outlet and be installed in water tank (5) interior heating tube (6), high low water level sensor and temperature sensor (7), the water inlet is equipped with entering water electromagnetic valve (4), and have control circuit (1) to be connected with heating tube (6), each sensor and entering water electromagnetic valve (4), it is characterized in that: temperature sensor (7) and heating tube (6) all are positioned at the delivery port below.

2, boiler according to claim 1, it is characterized in that: said control circuit (1) comprises transformer and the regulator rectifier circuit that is attached thereto, the output termination main control circuit of regulator rectifier circuit, the output control entering water electromagnetic valve (4) of this circuit, heating tube (6), and its input is connected with the output of temperature sensing circuit and height water level detection circuit, and the other end of height water level detection circuit is connected to the output of transformer.

3, boiler according to claim 2, it is characterized in that: said main control circuit comprises output, three NAND gate U2A that input connects successively, U2B, U2C, a nor gate U3A and two NAND gate U1A, first branch road that U1B constitutes, U2A wherein, U2C, two input parallel connections of U1A, the output of this branch road connects transistor amplifier by resistance R 12, the output of amplifying circuit and the output of regulator rectifier circuit tap into the control end of water solenoid valve (4), and have diode E6 to be connected between the two ends, be connected to the input of this branch road behind the low water level sensor series diode E5; Output termination second branch road of temperature sensor (7), it comprises the NAND gate U5C that comparator U4A and two inputs are connected with comparator U4A output by resistance, the vacant input of the output termination NAND gate U2B of NAND gate U5C and the input of nor gate U3B, the input of the output termination U3C of U3B, node between U2A and the U2B connects two inputs of NAND gate U2D, another input of its output termination U3C; NAND gate U1C, the U1D of the output termination input parallel connection two series connection, separately of U3C and resistance R 13 backs connect the relay J 2 of control heating tube (6) by drive circuit: connect the 3rd branch road behind the high water level sensor series diode E4, this branch road comprises two NAND gate U5A and U5B, connect two inputs of U5B behind the output series diode E10 of U5A, and connect the vacant input of nor gate U3A in first branch road.

4, boiler according to claim 3 is characterized in that: the output of comparator U4A is by resistance R 7 and swept resistance RW1 ground connection.