CN201715742U - Automatic pipe emptying device of solar water heater - Google Patents

Abstract

The utility model is an automatic emptying device for pipelines of solar water heaters. A normally closed electromagnetic valve is provided at the outlet hole of the solar water tank, and a three-way air inlet is arranged under it, and a one-way check valve is arranged at an interface of the three-way inlet. , a drain tee is set on the water pipe at the lower part of the intake tee, and a normally open solenoid valve is set at one interface of the drain tee. There is a water supply tee, one interface of the water supply tee is provided with a normally closed solenoid valve, and a water flow switch is provided at the lower part of the water supply tee, and the water stop solenoid valve and the drain solenoid valve are connected in parallel to a 12V DC through the water flow switch The power supply, the water supply solenoid valve is connected in series with a one-way diode and then connected in parallel with the drain solenoid valve, and the water supply solenoid valve is connected to the water supply power supply of the tester. The purpose of the utility model is to provide a device with simple structure, low cost and automatic emptying.

Description

Solar water heater pipeline automatic emptying device

technical field

The utility model relates to the technical field of solar water heater devices, in particular to an automatic emptying device for solar water heater pipelines.

Background technique

At present, the technology for emptying solar water heater pipelines basically stays in a semi-automatic state, requiring people to open or close the emptying valve. If it is not fully automatic, even if it is fully automatic, it cannot be popularized and used due to the high cost. Therefore, the current winter is relatively cold. When installing solar water heaters in the region, the method of combining thermal insulation materials and heating cables is used to ensure the smooth flow of the upper and lower water pipes.

The combination of traditional thermal insulation materials and heating cables to ensure the smooth flow of pipelines is also a common technology at present. It is the part of the pipeline exposed to the outdoors that lays an electric heating heating cable along the pipeline, and then wraps it with thermal insulation cotton. When the pipeline is frozen, use the heating cable to energize and melt the pipeline before use. The disadvantages of this technology are as follows: a. After freezing, the user cannot use hot water in time and needs to wait for the pipeline to clear. b. After the pipeline is connected, the user forgets to turn off the heating cable, which is prone to fire after a long time. This is also a major problem with solar water heaters in the north, and it is also a major safety hazard.

The Chinese utility model patent No. 200820072224.3 discloses an automatic emptying device for a solar water heater.

This technology provides an emptying device for the upper and lower water pipes of a solar water heater, which includes an emptying valve, an emptying pipe, a tee, an upper and lower water pipe, a water heater switch, an insulated water tank, an inner liner of the insulated water tank, an extension pipe for the upper and lower water pipes, etc. constitute. Its main technology is that the emptying pipeline, the upper and lower water pipelines are respectively connected with the extension pipes of the upper and lower water pipelines through a three-way and artificial bending. Installed at the end of the emptying pipe, the tee is connected to the upper and lower water pipes by bending, and connected to the water heater switch at its end. When the water heater is used up when it is cold, open the emptying valve, the air enters the mouth of the upper and lower water pipes, and the water heater is cut off Connect with the water in the upper and lower water pipes, turn on the switch of the water heater, drain all the water in the pipe, close the emptying valve for the next bath, and inject water first, so that the water in the upper and lower water pipes can be connected to the water in the water heater insulation tank before use.

Its disadvantages are as follows:

1. It is not fully automatic, and the user's operation is cumbersome. If you forget any operation steps, the water pipe will freeze to death.

2. It needs to be used in conjunction with corresponding instruments, and the cost is high, so it is difficult to widely promote and use it.

The Chinese utility model patent No. 01262489.6 provides an automatic emptying device for solar water heaters, which mainly includes a controller, an upper emptying valve located on the upper part of the water inlet and outlet pipes, and a vent hole. The lower emptying valve, the upper emptying valve and the lower emptying valve are all electric control valves, and their electric control terminals are respectively connected to the corresponding control output ports of the controller; the pipeline between the upper emptying valve and the lower emptying valve A temperature sensor is arranged inside or on the outer wall of the pipeline, and the output end of the temperature sensor is connected with the temperature detection interface of the controller. In the actual use of the utility model, its controller can make a judgment according to the temperature signal transmitted by the temperature sensor. When the temperature of the pipeline is too low and close to the freezing point, the controller sends an instruction to close the upper emptying valve and open the lower emptying valve. drain pipe

Its disadvantages are as follows:

1. It needs to be controlled by the combination of instruments and sensors. If there is a failure, it cannot be emptied, and the pipeline will be frozen. When installing, it is necessary to install a heating cable just in case.

2. The cost is too high, and it is difficult to widely promote and use it.

Utility model content

The purpose of the utility model is to provide a solar water heater pipeline automatic emptying device with simple structure, low cost and automatic emptying.

The technical scheme that realizes the above-mentioned purpose of the invention is as follows:

The automatic emptying device of the solar water heater pipeline is equipped with a tee, a solenoid valve and a one-way check valve on the water pipe between the water outlet hole of the solar water tank and the hot water outlet of the user, and a normally closed solenoid valve is installed at the water outlet hole of the solar water tank As a water-stop solenoid valve, there is an air intake tee under it, and a one-way check valve is set at an interface of the air intake tee as an air inlet, and a drain tee is set on the water pipe at the lower part of the air intake tee. One interface of the tee is provided with a normally open solenoid valve as a drain solenoid valve. The position of the drain tee is on the indoor part of the water pipe. There is a normally closed solenoid valve as the water supply solenoid valve at one interface, and a water flow switch is provided at the lower part of the water supply tee. After the water stop solenoid valve and the drain solenoid valve are connected in parallel, they are connected to a 12V DC power supply through the water flow switch. The water supply solenoid valve A one-way diode is connected in series and connected in parallel with the drain solenoid valve, and the water supply solenoid valve is connected to the water supply power supply of the tester.

The utility model has the following advantages:

1. Divide the pipeline into three sections, use the self-weight of water to empty the pipeline and turn on the water flow switch to realize the automatic emptying function, use water to empty the pipeline when not in use, and completely separate the use of thermal insulation cotton and heating tape .

2. Low cost, suitable for promotion and use;

Description of drawings

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

Fig. 2 is the electrical schematic diagram of the utility model.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment the utility model is further described.

As shown in Figure 1, a solar water heater pipeline automatic emptying device, which is mainly to set a tee on the water pipe between the solar water tank 1 water outlet 2 and the user's hot water outlet 8, and through a check valve, a solenoid valve , the water flow switch and the one-way two-way pipe form the air inlet, the drain port and the upper water outlet, and realize automatic drainage through the opening and closing of the water flow switch. One of the normally closed solenoid valves is connected to the water outlet hole 2 of the solar water tank as a water stop Solenoid valve 3, connect a non-return valve 4 as the air intake hole through the intake tee, and then connect the lower (upper) water pipe, and the water pipe connects a normally open solenoid valve with a drain tee to the user's roof 9 as Drain electromagnetic valve 5 is used for draining, and the position of just draining tee can make the water in the outdoor part water pipe empty. Then connect a normally closed solenoid valve as the water supply solenoid valve 6 of the solar water heater by a water supply tee, and the other end is connected to a water flow switch (so that it is ensured from There is water in the pipe from the roof to the water flow switch on the ground. When installing solar energy and maintenance, there is no water in the pipe, so it must be artificially poured in, and the water pressure of this section of water should be used to connect the water flow switch), the solenoid valve and The one-way intake valve should be wrapped with insulation material. After the waterway is connected, use a 12V DC power supply 11 (this power supply can use the water supply power supply 12 of the tester) to connect the water stop solenoid valve and the drain solenoid valve in parallel through the water flow switch, and connect the water supply solenoid valve in parallel through a one-way diode 13 In the circuit, the water supply power supply 12 of the tester is connected to the water supply solenoid valve. When the faucet is turned on, the water in the pipeline from the roof to the water flow switch will turn on the water flow switch, the water stop valve will be opened, and the drain valve will be closed. Due to the cut-off current of the one-way diode, the water supply solenoid valve will not operate. In the solar water tank The water flows out from the faucet through the pipe, and the water in the water flow switch of the faucet does not flow, the water flow switch is disconnected, the water stop valve is closed, and the drain valve is opened, because air can enter from the intake valve, from the water stop valve to the drain valve The water in the pipeline is just discharged from the drain valve (the drain pipe of the drain valve can be inserted into the toilet or other water-using equipment to reduce the waste of water), and the automatic emptying function of the pipeline leaking outside has been realized. When the solar energy is watering, the power supply of the test instrument is powered, the water stop valve is opened, the drain valve is closed, the water supply solenoid valve is used to supply water to the solar energy through the pipeline, the water is full, the power of the test instrument is turned off, the water stop valve is closed, and the drain valve is opened drain. Just realized that the pipeline exposed to the outside is in the empty state for a long time.

Claims (2)

1. The automatic emptying device of the solar water heater pipeline, which is characterized in that: a tee, a solenoid valve and a one-way check valve are arranged on the water pipe between the water outlet hole of the solar water tank and the hot water outlet of the user, and the water outlet hole of the solar water tank is set There is a normally closed solenoid valve as the water stop solenoid valve, under which there is an air inlet tee, and a one-way check valve is set at one interface of the air inlet tee as the air inlet, which is set on the water pipe at the lower part of the air inlet tee. A drain tee, a normally open solenoid valve is set at one interface of the drain tee as a drain solenoid valve, the position of the drain tee is on the indoor part of the water pipe, and a water supply three One interface of the water supply tee is provided with a normally closed solenoid valve as the water supply solenoid valve, and a water flow switch is provided at the lower part of the water supply tee. After the water stop solenoid valve and the drain solenoid valve are connected in parallel, they are connected to a 12V DC through the water flow switch The power supply, the water supply solenoid valve is connected in series with a one-way diode and then connected in parallel with the drain solenoid valve, and the water supply solenoid valve is connected to the water supply power supply of the tester. 2. The solar water heater pipeline automatic emptying device according to claim 1, characterized in that: the 12V DC power supply connected through the water flow switch after the water stop solenoid valve and drain solenoid valve are connected in parallel is the water supply power supply of the tester.

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