A kind of electric heater
Technical field
The present invention relates to electric heater, particularly a kind of electric heater that is used for Fast Heating liquid belongs to the improvement technology that has electric heater now.
Background technology
The electrical heating product that present specialty is used for the liquid heating has for example products such as water dispenser, insulating pot, electric water bottle, electric water boiler, these products all are to place a lot of water in heating chamber in advance, whole water with the inside heat fully then, like this, hot water if desired is not a lot, obviously is to waste energy.
Therefore, the someone proposes, and heating chamber is separated with storage tank, wants to burn how much water and just burns how much water, and storage tank separates with heating chamber, when needs add hot water, by water pump with the water pump in the storage tank in heating chamber, need how much water, with regard to how much water of pump.Can reach certain energy-saving effect.
But for above-mentioned heater, the operating power of thick film heater is fixed, and can not regulate its operating power automatically according to the variations in temperature of water to be heated.Because the temperature of water tank is different in different places, under different seasons and different state of weather, temperature differs and may reach about 20 degree, in when heating, and the variation that thick film heater can't the perception water temperature, still heat according to certain power, like this, when temperature is low, original water temperature is crossed when low, firing rate is slow, and the temperature of water may not reach the requirement that requires the user.
Summary of the invention
The objective of the invention is to address the above problem and provide a kind of can be according to water temperature with the power adjusting of thick film heater to making the water can boiled fast value, make it to satisfy the electric heater of the temperature that quickly heats up to customer requirements.
The technical scheme that realizes the object of the invention is: a kind of electric heater, comprise control circuit, water tank, water pump, the thick film heater that has water inlet and delivery port and faucet, water tank is connected by water pipe with water pump, the delivery port of water pump is connected with the water inlet of thick film heater, the delivery port of thick film heater is connected with faucet, it is characterized in that at least one temperature sensor is set on the electric heater, and temperature sensor is connected with control circuit.Temperature sensor is used to monitor the inner or peripheral water temperature of electric heater thick film heater, and water temperature is fed back to control circuit, realizes the adjusting control to the thick film heater heating power.
The said temperature sensor adopts thermistor.
Above-mentioned thermistor be arranged in the water tank as the water inlet thermistor or the connecting pipe of water tank and thick film heater in.Be used to detect the temperature that enters water in the water tank.
In order accurately to detect coolant-temperature gage, so that the present invention can also also be provided with a delivery port thermistor that is connected with control circuit according to the heating power of leaving water temperature control heater near the delivery port of thick film heater.
The delivery port of above-mentioned thick film heater is equipped with effluent switch, and effluent switch is communicated with faucet and is electrically connected with control circuit.
Above-mentioned effluent switch is by electronically controlled magnetic valve.
Be provided with water return pipeline between the delivery port of above-mentioned thick film heater and the water tank, water return pipeline is provided with and is equiped with the effluent recycling gauge tap, and the effluent recycling gauge tap is electrically connected with control circuit.
Above-mentioned water pump also is connected with control circuit, to realize the control of control circuit to the thick film heater inflow.
The delivery port of above-mentioned thick film heater is in the position of thick film heater periphery or bottom.
For safety, avoid thick film heater generation dry combustion method, in the bottom of thick film heater an anti-dry thermistor is set also, it is electrically connected with control circuit.Be used to monitor the surface temperature of thick film heater, prolong the service life of thick film heater.
The invention has the beneficial effects as follows that because temperature sensor is set on heater, the operating power of thick film heater becomes and can control, and can carry out work according to user's needs, not only product is safer, uses also more convenient.When the water temperature of water tank is crossed when low, the temperature signal that temperature sensor will enter the water of thick film heater is delivered to control circuit, control circuit according to program with the power adjusting of thick film heater to making the water can boiled fast value, make it the constant requirement of satisfied temperature.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention 1;
Fig. 2 is a circuit connection diagram of the present invention.
Fig. 3 is that of the present invention another implemented structural representation.
The specific embodiment
Below in conjunction with drawings and Examples concrete real-time mode of the present invention is described further.
Embodiment 1:
As shown in Figure 1, in the present embodiment, electric heater comprises control circuit 9, water tank 1, water pump 2, the thick film heater 4 that has water inlet 5 and delivery port 8, effluent switch 6 and faucet 7, water tank 1 and water pump 2 are connected by water pipe, the delivery port of water pump 2 is connected with the water inlet 5 of thick film heater 4, effluent switch 6 is installed on the delivery port 8 of thick film heater 4, and effluent switch 6 is communicated with faucet 7.In concrete enforcement, effluent switch 6 adopts magnetic valve, two thermistors 3 are separately positioned on the position of the water inlet 5 of thick film heater 4 and delivery port 8, an anti-dry thermistor 3 is located at thick film heater 4 bottom (not shown)s, and three thermistors 3 and effluent switch 6 are electrically connected with control circuit 9 respectively.Can know the direction of current and being connected of each part clearly from Fig. 1, when these parts being placed in any one shell that designs, just form actual product.
Circuit connection diagram of the present invention as shown in Figure 2, control circuit comprises input power supply L/N, this power supply is used to supply with central control unit through voltage of circuit such as reduction voltage circuit output, because of reduction voltage circuit and central control unit belong to the mature technology of household appliances product, so do not give unnecessary details.
Water inlet 5 on the thick film heater 4, delivery port 8 and three thermistors 3 of anti-dry are electrically connected so that detected three place's real-time temperatures to be provided with central control unit respectively, K1, K2, K3 are electrically connected with central control unit respectively, and central control unit provides power supply by reduction voltage circuit.K1, K2, K3 control thick film heater 4, water pump 2, effluent switch 6 respectively.
The flow direction of current was when the present invention worked: the user is placed on water in the storage tank 1, effect through water pump 2, water in the water tank 1 is extracted in the thick film heater 4 by water pump 2, then, slowly flow in the pipeline of these water in thick film heater 4, the shape of pipeline can be spiral, also can be linear, can can realize easily that the present invention does not give unnecessary details by prior art; Water in the thick film heater 4 enters effluent switch 6 from its outlet then; Water inlet thermistor 3 passes to control circuit 9 with the temperature value that records, control circuit 9 sends signal the power of thick film heater 4 is regulated, in addition, delivery port thermistor 3 passes to control circuit 9 with the temperature value that records, when its temperature that records meets the demands, effluent switch 6 is opened, and boiling water flows to faucet 7 backs from effluent switch 6 outlets and flows out.
Above-mentioned thick film heater 4 is that heating resistance wire is imprinted on stainless iron or stainless steel surfaces, energising back Fast Heating, and its thermal efficiency and security are more taller than common heat-generating pipe, therefore, have at present to begin to be applied on the insulating pot.
Embodiment 2:
As shown in Figure 3, the electric heater difference from Example 1 is in the present embodiment: the delivery port 8 of thick film heater 4 is not installed effluent switch 6, but between the delivery port 8 of described thick film heater 4 and water tank 1, be provided with water return pipeline 11, water return pipeline 11 is provided with and is equiped with effluent recycling gauge tap 10, and effluent recycling gauge tap 10 is electrically connected with control circuit 9.When thick film heater 4 stops to heat, control circuit 9 opens it to water outlet backflow gauge tap 10 signals, hot water in the thick film heater 4 is back in the water tank 1, during use, thick film heater 4 heating, effluent recycling gauge tap 10 cuts out, and the hot water in the thick film heater 4 normally flows out from faucet 7.