CN201285177Y - Feeding water automatic controller for solar water heater - Google Patents

Abstract

A solar water heater water supply control device, including an electric valve installed in the water supply pipeline, a directional rotating spring piece embedded with a magnetic cylinder on the back of the return water pipeline, and a return spring is installed on the rotating shaft of the spring piece. Hall sensors corresponding to the magnetic cylinders are installed on the outside of the water pipeline, and the electric valves and Hall sensors are also connected to the control circuit respectively. The utility model detects the signal that the water in the water tank is full through the Hall sensor and inputs the signal into the control circuit, and the control circuit drives the opening and closing of the electric valve, thereby realizing the automatic control of the water supply of the solar water heater, and the detection of the utility model The components are all installed in the indoor pipeline, which effectively solves the high failure rate caused by the harsh working environment of the sensor, and greatly shortens the length of the signal line, ensuring the reliability of the entire system and extending the service life.

Description

Solar Water Heater Water Supply Automatic Control Device

technical field

The invention relates to an automatic control device for water supply of a water heater, in particular to an automatic control device for water supply of a solar water heater which automatically shuts off the water supply through the information of the overflow and return water after the water tank is full.

Background technique

With the depletion of primary energy and the dual pressure of reducing environmental pollution, solar water heaters, the application products of solar energy in low and medium temperatures, are going to millions of households, and the control method of water supply is also gradually improving and perfecting. At present, the common solar water heater water supply control systems have several forms such as electric fully automatic, electric semi-automatic, mechanical semi-automatic, etc., although each has its advantages and disadvantages, there are shortcomings and deficiencies. For example, the fully automatic electric water supply control system is exempt from operation and has a high degree of automation; however, the automatic water supply control device provides the signal of the water level through the liquid level sensor of the water tank, and adjusts the opening and closing of the electric valve connected in series in the water supply pipeline. In order to maintain the water level in the water tank, the water level sensor in the water tank of the solar water heater on the top of the building is controlled by the way of closing the water supply, and the electric valve installed in the bathroom of the house is generally at a distance of more than ten meters to tens of meters, especially on the roof part. The harsh working environment of the water level sensor and the outdoor signal line (such as the sun's blazing in summer and the freezing of ice and snow in winter) not only makes the failure rate higher but also seriously affects the life of the device. At the same time, the control system is always on The continuous working state of monitoring the water level of the water tank consumes electric energy. In the electric semi-automatic water supply control system, after manually connecting the circuit, the electric valve is driven to automatically open the water supply, and when the water level in the water tank reaches the required height signal, a closing signal is sent to drive the electromagnetic valve to automatically close, and then the power supply is automatically disconnected. , although the problem of waste of electric energy in the fully automatic control mode is effectively solved, the installation mode of the sensor for collecting water level information of the water tank and the electromagnetic valve of the control mechanism are still the same as the fully automatic mode, so the problems of high failure rate and short life still exist. The main reason is that the sensor for collecting the water level information of the water tank in the above system is still installed in the water tank of the solar water heater on the roof. The outdoor working environment is harsh, and it is far away from the signal processing circuit and electric valve installed in the bathroom. The aging or mechanical damage of the signal line of more than ten meters is the cause of the failure.

Contents of the invention

The purpose of the present invention is to overcome the above-mentioned shortcoming of prior art, provide a kind of can thoroughly improve the harsh working environment of the sensor, and greatly shorten the length of the signal line, thereby ensuring the reliability of the sensor, prolonging the service life; and installation A convenient and easy-to-operate solar water heater water supply control device.

In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: including an electric valve installed in the water supply pipeline, a directional rotating spring piece of a magnetic cylinder is embedded on the back of the return water pipeline, and a reset valve is installed on the rotating shaft of the spring piece. The spring is also equipped with a Hall sensor corresponding to the magnetic cylinder on the outside of the return pipe, and the said electric valve and the Hall sensor are also connected with the control circuit respectively.

The diameter of the copper reed in the invention is smaller than that of the return water pipeline; the control circuit is a comparator with drive output.

Since the present invention is equipped with a directional rotating spring sheet inlaid with a magnetic cylinder on the back in the return water pipeline, and a Hall sensor corresponding to the magnetic cylinder is also installed on the outside of the return water pipeline, the Hall sensor detects that the water in the water tank is full. The signal and input the signal into the control circuit, and the control circuit controls the opening and closing of the electric valve, thereby realizing the automatic control of the solar water heater, and the detection components of the present invention are all installed in the indoor pipeline, thereby effectively solving the problem of The working environment of the sensor is harsh, and the length of the signal line is shortened to about 0.1 meters, which ensures the reliability of the system and prolongs the service life.

Description of drawings

Fig. 1 is a structural schematic diagram of an automatic water supply control device for a solar water heater.

Detailed ways

The present invention will be described in detail below in conjunction with the accompanying drawings.

As shown in Figure 1, the present invention includes an electric valve 2 installed in the water supply pipeline 1, and a directional rotating spring piece 6 with a magnetic cylinder 7 embedded in the back of the return water pipeline 4. The diameter of the spring piece 6 is smaller than that of the return water pipe. The diameter of the road, and the return spring 5 is installed on the rotating shaft of the spring leaf 6, and the Hall sensor 8 corresponding to the magnetic cylinder 7 is also installed on the outside of the return pipe 4. The said electric valve 2 and the Hall sensor 8 are also respectively connected with a control circuit 3 with a comparator with drive output, and the section of the return pipe where the magnetic cylinder 7 and Hall sensor 8 are installed is required to be made of copper.

Its working principle is as follows: when the solar water heater is not filled with water, the power supply is in the disconnected state, and the device does not work; in a horizontal position. When the solar water heater needs to be filled with water, when the power supply is turned on manually, the control circuit 3 sends a signal to drive the electric valve 2 to open, and the water supply starts. At this time, the leaf spring 6 is still in a horizontal position, and the Hall sensor 8 is in a normal working condition; Turn from the horizontal position to the vertical position under punching. At this time, the magnetic cylinder 7 is close to the inner wall of the return water pipeline 4, and the magnetic force line of the magnetic cylinder 7 passes through the copper tube and is received by the Hall sensor 8 and outputs an electrical signal. At this time, the water tank full information is converted into an electrical signal; The signal is compared and processed by the control circuit 3 and drives the electric valve 2 to close. At the same time, the main power supply is cut off, the entire control system stops working, and the water supply is over. After the overflow of the return pipe 4 ends, the spring leaf 6 returns to the horizontal position under the action of the return spring 7 .

If after the water supply is finished, the overflow and return water will also be produced due to the increase in the volume due to the rise of the water temperature, but its flow rate is very small. Since the diameter of the spring leaf 6 of the present invention is smaller than the diameter of the return pipe 4, the flow rate is very small The overflow water flows out through the gap between the spring leaf 6 and the inner wall of the return water pipe 4 without accumulating in the return water pipe. Even if the return water accumulates in the return water pipe for some reason, it will not cause the occurrence of water supply error or the change of the system state, because the power is turned off during these times, so the work of the system is reliable.

Claims (3)

1. A solar water heater water supply control device, characterized in that it includes an electric valve (2) installed on the water supply pipeline (1), and a magnetic cylinder (7) is embedded on the back of the return water pipeline (4). Directional rotation spring leaf (6), return spring (5) is installed on the rotating shaft of this spring leaf (6), is also installed with the hall sensor ( 8), said electric valve (2) and Hall sensor (8) are also connected with the control circuit (3) respectively. 2. The solar water heater water supply control device according to claim 1, characterized in that the diameter of the copper reed (6) is smaller than the diameter of the return water pipeline. 3. The water supply control device for solar water heater according to claim 1, characterized in that said control circuit (3) is a comparator with drive output.

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