CN201488238U - an electric heater - Google Patents

Abstract

The utility model is an electric heater, comprising a control circuit (9), a water tank (1), a water pump (2), a thick film heater (4) with a water inlet (5) and a water outlet (8) and a water outlet The nozzle (7), the water tank (1) and the water pump (2) are connected through water pipes, the water outlet of the water pump (2) is connected with the water inlet (5) of the thick film heater (4), and the outlet of the thick film heater (4) The water port (8) is connected with the water outlet nozzle (7), and it is characterized in that at least one temperature sensor is arranged on the electric heater, and the temperature sensor is connected with the control circuit (9). In the utility model, since a temperature sensor is installed on the heater, the working power of the thick-film heater can be adjusted and controlled. When the water temperature in the water tank is too low, the temperature sensor transmits the temperature signal of the water entering the thick-film heater to the control circuit. , the control circuit will make it meet the requirement of constant temperature according to the program, so that the water can be boiled quickly, not only the product is safer, but also more convenient to use.

Description

an electric heater

technical field

The utility model relates to an electric heater, in particular to an electric heater for rapidly heating liquid, which belongs to the improvement technology of the existing electric heater.

Background technique

At present, electric heating products that are professionally used for liquid heating include water dispensers, electric kettles, electric water bottles, electric tea stoves and other products. In these products, a lot of water is placed in the heating chamber in advance, and then all the water inside is completely heated. In this way, If there is not much hot water needed, it is obviously a waste of energy.

Therefore, someone proposes to separate the heating chamber from the water storage tank, burn as much water as you want, and separate the water storage tank from the heating chamber. Water, just pump as much water. A certain energy-saving effect can be achieved.

However, for the above-mentioned heaters, the working power of the thick film heater is fixed, and the working power cannot be automatically adjusted according to the temperature change of the water to be heated. Because the temperature of the water tank is different in different places, in different seasons and different weather conditions, the temperature difference may reach about 20 degrees. When heating, the thick film heater cannot sense the change of water temperature, or according to a certain power In this way, when the air temperature is low and the original water temperature is too low, the heating speed is slow, and the temperature of the water may not meet the requirements of the user.

Utility model content

The purpose of this utility model is to solve the above problems and provide an electric heater that can adjust the power of the thick film heater to the value that can quickly boil the water according to the water temperature, so that it can quickly heat to the temperature required by the user.

The technical solution to realize the purpose of this utility model is: an electric heater, including a control circuit, a water tank, a water pump, a thick film heater with a water inlet and a water outlet, and a water outlet. The water tank and the water pump are connected through a water pipe, and the outlet of the water pump The water port is connected to the water inlet of the thick film heater, and the water outlet of the thick film heater is connected to the water outlet. It is characterized in that at least one temperature sensor is arranged on the electric heater, and the temperature sensor is connected with the control circuit. The temperature sensor is used to monitor the water temperature inside or around the thick film heater of the electric heater, and feed back the water temperature to the control circuit to realize the adjustment and control of the heating power of the thick film heater.

The above temperature sensor adopts a thermistor.

The above-mentioned thermistor is arranged in the water tank or in the connecting pipe between the water tank and the thick film heater as the water inlet thermistor. Used to detect the temperature of the water entering the tank.

In order to accurately detect the water outlet temperature so that the utility model can also control the heating power of the heater according to the water outlet temperature, a water outlet thermistor connected with the control circuit is also arranged near the water outlet of the thick film heater.

The water outlet of the above-mentioned thick film heater is provided with a water outlet switch, and the water outlet switch communicates with the water outlet and is electrically connected with the control circuit.

The above water outlet switch is an electronically controlled electromagnetic valve.

A water return pipe is provided between the water outlet of the thick film heater and the water tank, and a water outlet return control switch is installed on the return water pipe, and the water outlet return control switch is electrically connected to the control circuit.

The above-mentioned water pump is also connected with the control circuit to realize the control of the water intake of the thick film heater by the control circuit.

The water outlet of the thick film heater is located at the periphery or bottom of the thick film heater.

In order to be safe and avoid dry burning of the thick film heater, an anti-dry burning thermistor is also arranged at the bottom of the thick film heater, which is electrically connected with the control circuit. Used to monitor the surface temperature of thick film heaters and prolong the service life of thick film heaters.

The beneficial effect of the utility model is that since the temperature sensor is installed on the heater, the working power of the thick film heater can be controlled, and can work according to the user's needs. Not only the product is safer, but also the use is more convenient. When the water temperature in the water tank is too low, the temperature sensor transmits the temperature signal of the water entering the thick film heater to the control circuit, and the control circuit adjusts the power of the thick film heater to a value that enables the water to boil quickly according to the program. It can meet the requirement of constant temperature.

Description of drawings

Fig. 1 is the structural representation of the utility model embodiment 1;

Fig. 2 is a schematic diagram of the circuit connection of the utility model.

Fig. 3 is a schematic diagram of another embodiment of the utility model.

Detailed ways

The specific real-time mode of the utility model will be further described below in conjunction with the accompanying drawings and embodiments.

Example 1:

As shown in Figure 1, in this embodiment, the electric heater includes a control circuit 9, a water tank 1, a water pump 2, a thick film heater 4 with a water inlet 5 and a water outlet 8, a water outlet switch 6 and a water outlet 7, and the water tank 1 and the water pump 2 are connected through water pipes, the water outlet of the water pump 2 is connected to the water inlet 5 of the thick film heater 4, the water outlet switch 6 is installed on the water outlet 8 of the thick film heater 4, and the water outlet switch 6 is connected to the water outlet 7. In specific implementation, the water outlet switch 6 adopts a solenoid valve, two thermistors 3 are respectively arranged on the positions of the water inlet 5 and the water outlet 8 of the thick film heater 4, and an anti-dry burning thermistor 3 is arranged on the thick film heater 4. The bottom of the heater 4 (not shown in the figure), three thermistors 3 and the water outlet switch 6 are electrically connected to the control circuit 9 respectively. From Figure 1, we can clearly know the direction of water flow and the matching connection of various parts. When these parts are placed in any designed shell, the actual product will be formed.

The circuit connection schematic diagram of the utility model is shown in Figure 2. The control circuit includes an input power supply L/N, which outputs a voltage through a step-down circuit and other circuits to supply the central control unit, because the step-down circuit and the central control unit belong to household appliances The mature technology of the product, so I won't go into details.

The water inlet 5, the water outlet 8 and the three thermistors 3 of the thick-film heater 4 are electrically connected to the central control unit to provide the three real-time temperatures detected, and K1, K2, and K3 are respectively connected to the central control unit. The units are electrically connected, and the central control unit is powered by a step-down circuit. K1, K2, and K3 respectively control the thick film heater 4, the water pump 2, and the water outlet switch 6.

The flow direction of the water flow when the utility model is working is: the user puts water in the water storage tank 1, and through the action of the water pump 2, the water in the water tank 1 is pumped into the thick film heater 4 by the water pump 2, and then, the water is pumped into the thick film heater 4. Slowly flow in the pipeline in the thick film heater 4, the shape of the pipeline can be spiral or linear, which can be easily realized by means of the prior art, and the utility model will not go into details; then the thick film heater The water in 4 enters the water outlet switch 6 from its outlet; the water inlet thermistor 3 transmits the measured temperature value to the control circuit 9, and the control circuit 9 sends a signal to adjust the power of the thick film heater 4. In addition, the water outlet The thermistor 3 transmits the measured temperature value to the control circuit 9, and when the measured temperature meets the requirements, the water outlet switch 6 is opened, and the boiling water flows out from the outlet of the water outlet switch 6 to the water outlet nozzle 7.

The above-mentioned thick film heater 4 is to screen-print the heating resistor on the surface of stainless iron or stainless steel, and heat it up quickly after being energized. Its thermal efficiency and safety are higher than ordinary heating tubes. Therefore, it is currently being used in electric kettle superior.

Example 2:

As shown in Figure 3, the electric heater in this embodiment is different from Embodiment 1 in that: the water outlet 8 of the thick film heater 4 is not equipped with a water outlet switch 6, but the water outlet of the thick film heater 4 8 and the water tank 1 are provided with a return pipe 11, and the return pipe 11 is provided with a water outlet return control switch 10, and the outlet water return control switch 10 is electrically connected with the control circuit 9. When the thick-film heater 4 stopped heating, the control circuit 9 gave a signal to the water return control switch 10 to turn it on, and the hot water in the thick-film heater 4 flowed back into the water tank 1. When in use, the thick-film heater 4 was heated and water was discharged The backflow control switch 10 is closed, and the hot water in the thick film heater 4 flows out from the outlet nozzle 7 normally.

Claims (10)

1. An electric heater, comprising a control circuit (9), a water tank (1), a water pump (2), a thick film heater (4) with a water inlet (5) and a water outlet (8) and a water outlet ( 7), the water tank (1) and the water pump (2) are connected through a water pipe, the water outlet of the water pump (2) is connected with the water inlet (5) of the thick film heater (4), and the water outlet of the thick film heater (4) ( 8) Connected to the spout (7), characterized in that at least one temperature sensor is arranged on the electric heater, and the temperature sensor is connected to the control circuit (9). 2. The electric heater according to claim 1, characterized in that said temperature sensor adopts a thermistor (3). 3. The electric heater according to claim 2, characterized in that the thermistor (3) is set in the water tank (1) as the water inlet thermistor or the water tank (1) and the thick film heater (4) in the connecting pipeline. 4. The electric heater according to claim 3, characterized in that a water outlet thermistor ( 3). 5. The electric heater according to claim 1, characterized in that the water outlet (8) of the thick film heater (4) is equipped with a water outlet switch (6), and the water outlet switch (6) is connected to the water outlet (7) And be electrically connected with the control circuit (9). 6. The electric heater according to claim 5, characterized in that the water outlet switch (6) is an electronically controlled solenoid valve. 7. The electric heater according to claim 1, characterized in that a return water pipe (11) is provided between the water outlet (8) of the thick film heater (4) and the water tank (1), and the return water pipe (11) is equipped with a water outlet backflow control switch (10), and the water outlet backflow control switch (10) is electrically connected to the control circuit (9). 8. The electric heater according to claim 1, characterized in that the water pump (2) is electrically connected to the control circuit (9). 9. The electric heater according to claim 1, characterized in that the water outlet (8) of the thick film heater (4) is located at the periphery or bottom of the thick film heater (4). 10. The electric heater according to claim 3 or 4, characterized in that an anti-dry temperature sensor (3) is provided at the bottom of the thick film heater (4), which is electrically connected to the control circuit (9).

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