CN201819436U - New emptying device - Google Patents

Abstract

The utility model discloses a novel emptying device for emptying retained water in a water inlet-outlet pipe of a solar water heater, wherein a section of water inlet-outlet pipe which is not smaller than the maximal height of a water level in an inner water tank stretches into the bottom of the inner water tank of the solar water heater; a ventilating switch is communicated with the water inlet-outlet pipe stretching into the inner water tank; the height of the joint between the ventilating switch and the water inlet-outlet pipe is not smaller than the maximal height of the water level in the inner water tank; and the ventilating switch is arranged in a heat insulation layer between the inner water tank and an outer water tank of the solar water heater. In emptying, the ventilating switch is in an open state, at the moment, a water discharge switch is turned on, the water in the water inlet-outlet pipe flows out downwards under the action of the gravity, and the external air enters the water inlet-outlet pipe through the ventilating switch to supplement air, thereby realizing the purpose of emptying the retained water in the water inlet-outlet pipe.

Description

New emptying device

technical field

The utility model relates to a device for emptying the stagnant water in the inlet and outlet pipes of a solar water heater.

Background technique

At present, the known method of the emptying valve is that an electric switch and a one-way valve are connected on the water inlet and outlet pipes below the water heater water tank, and the one-way valve communicates with the water inlet and outlet pipes. When emptying, the electric switch cuts off the communication between the water inlet and outlet pipes and the solar water heater water tank , and then turn on the drain switch under the water inlet and outlet pipes, the stagnant water in the water inlet and outlet pipes under the electric switch will flow downward under the action of gravity, and the outside air will enter into the water inlet and outlet pipes through the one-way valve, thereby emptying the water in the water inlet and outlet pipes stagnant water. However, since the electric switch is outside, when the air is cold, the water film adhering to the electric switch freezes, causing the electric switch to be often damaged by freezing in winter.

Contents of the invention

In order to overcome the deficiency that the existing emptying valve is often damaged by freezing in winter, the utility model provides a new type of emptying device, which can not only realize the emptying function conveniently but also not be damaged by freezing.

The technical scheme adopted by the utility model to solve the technical problem is: one end of the water inlet and outlet pipe is connected with the water supply switch and the water discharge switch, and the other end extends into the inner water tank of the solar water heater, and the height of the water inlet and outlet pipe extending into the inner water tank is not less than that of the inner water tank. The maximum height of the water level in the water tank, and the port of the inlet and outlet pipes extending into the inner water tank is at the bottom of the inner water tank, there is a vent switch connected with the inlet and outlet pipes extending into the inner water tank, and the height of the connection between the vent switch and the inlet and outlet pipes Not less than the maximum height of the water level in the inner water tank, the ventilation switch is placed in the inner water tank of the solar water heater.

The beneficial effects of the utility model are: since the ventilation switch is arranged in the inner water tank of the solar water heater, the water film adhering to the ventilation switch will not freeze, and because of its simple structure and low cost, the new emptying device can stabilize Realize the emptying function.

Description of drawings

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

Fig. 1 is the structure schematic diagram of the utility model.

In the figure 1. Inner water tank, 2. Insulation layer, 3. Outer water tank, 4. Water inlet and outlet pipes, 5. Normally closed solenoid valve, 6. Water, 7. Exhaust port, 8. Water supply switch, 9. Water discharge switch.

Detailed ways

In the embodiment shown in Figure 1, one end of the water inlet and outlet pipe 4 communicates with the water supply switch 8 and the water discharge switch 9, and the other end extends into the inner water tank 1 of the solar water heater, and the height of the water inlet and outlet pipe 4 extending into the inner water tank 1 is higher than The maximum height of the water level in the inner water tank 1, and the port of the water inlet and outlet pipe 4 extending into the inner water tank 1 is at the bottom of the inner water tank 1, the normally closed solenoid valve 5 is connected with the water inlet and outlet pipe 4 at the highest point of the water inlet and outlet pipe 4, normally closed Solenoid valve 5 is in the inner water tank 1 of solar water heater. When emptying, the normally closed solenoid valve 5 is energized and is in the open state. At this time, the water release switch 9 is opened again, and the water in the water inlet and outlet pipe 4 flows downward under the action of gravity, and the outside air enters and exits through the opened normally closed solenoid valve 5. In the water pipe 4, the purpose of emptying the stagnant water in the water pipe 4 has been realized. When using the water 6 in the water tank, the normally closed solenoid valve 5 is in a closed state, and the water supply switch 8 is opened, so that after a part of water flows into the water inlet and outlet pipes 4, the water supply switch 8 can be closed, and the water outlet switch 9 is opened again at this time, and the water inlet and outlet pipes The water in 4 flows downward under the action of gravity, causing the pressure in the water inlet and outlet pipe 4 to be lower than the external atmospheric pressure, so the water 6 in the inner water tank 1 crosses the highest point of the water inlet and outlet pipe 4 and then goes down under the pressure of the external atmospheric pressure Flow out into and out of the water pipe 4, thereby reaching the purpose of using the water 6 in the water tank 1 in the water heater.

Claims (2)

1. A new type of emptying device, one end of the water inlet and outlet pipe is connected with the water supply switch and the water discharge switch, and its characteristics are: the other end of the water inlet and outlet pipe extends into the inner water tank of the solar water heater, and the height of the water inlet and outlet pipe extending into the inner water tank Not less than the maximum height of the water level in the inner water tank. The port of the water inlet and outlet pipes extending into the inner water tank is at the bottom of the inner water tank. There is a ventilation switch connected with the water inlet and outlet pipes extending into the inner water tank, and the connection between the ventilation switch and the water inlet and outlet pipes The height is not less than the maximum height of the water level in the inner water tank, and the ventilation switch is placed in the inner water tank of the solar water heater. 2. The novel emptying device according to claim 1, characterized in that: said ventilation switch is a normally closed solenoid valve.

Images