CN200993493Y - Top type constant pressure top water type double-tube emptying anti-freezing solar water heater - Google Patents

Abstract

A "top-type constant pressure top-water type double-tube emptying and antifreezing solar water heater" is characterized in that: an insulation constant pressure automatic water replenishment tank is provided on the top of the insulated water tank of the solar water heater, and an end-face sealed large-flow float valve is provided inside the tank. A siphon hot water pipe is provided, and the siphon pipe mouth of the siphon hot water pipe is placed on the top of the insulated water tank of the solar water heater. A drainage and sewage pipe and a drainage and sewage valve are provided on the lower part of the side of the insulated water tank of the solar water heater. The drainage and sewage pipe is connected to the middle part of the siphon hot water pipe through the drainage and sewage valve. The utility model integrates the automatic constant pressure water replenishment of the solar water heater and the emptying and antifreezing of the upper and lower water pipes, truly realizing the effective emptying and antifreezing of the solar water heater, thereby not only ensuring the normal operation of the solar water heater in the cold season and saving energy; but also achieving the purpose of not having to drain the cold water in the pipeline before using hot water, saving a large amount of water resources.

Description

Top type constant pressure top water type double pipe emptying antifreeze solar water heater

Technical field

The utility model relates to a solar water heater with automatic constant-pressure water replenishment and double-tube emptying and anti-freezing, and provides a "top-type constant-pressure top-water type double-pipe emptying and anti-freezing solar water heater".

Background technique

As we all know, solar energy is the omnipotent mother on the earth, and it is an inexhaustible clean energy source. A solar water heater is an effective device that directly converts sunlight energy into heat energy. At present, solar water heaters have entered thousands of households, and there are thousands of solar water heater manufacturers in China alone. However, more than 95% of the solar water heater products produced by all manufacturers are open, non-pressure-bearing and water-injected products, and a small amount of them are closed-mouth pressure-bearing. style products. The so-called open non-pressurized falling water type product, that is, the thermal insulation water tank of the solar water heater has inlet and exhaust ports connected to the atmosphere. The thermal insulation water tank is filled with cold water at one time, and the water supply valve is closed. The water outlet at the bottom flows out for use. Because solar water heaters are generally all installed on the top of the house, the longer upper and lower water pipes in the outdoor environment are always in a state of full water. When using hot water, at first it is necessary to drain more cold water in the sewer pipe before using hot water, which not only wastes a lot of water resources, but also brings a lot of inconvenience to use. When the cold winter comes, the water in the upper and lower water pipes is completely blocked by freezing due to the lack of thermal insulation function or poor thermal insulation function of the upper and lower water pipes, resulting in the failure of the solar water heater to work normally. At present, the existing technical solutions for solving the above-mentioned existing problems are: 1. Do a good job of thermal insulation of the upper and lower water pipes; but the cost of thermal insulation is very high, and the construction is difficult, and the cold water in the pipeline still needs to be released before using hot water ; 2. Install an electric or electromagnetic emptying valve at the water outlet of the solar thermal insulation water tank; but this device is not only expensive, but also has malfunctions due to the instability of the electronic components themselves and the safety factors of the power supply used. Potential safety hazards; 3. Three-valve top-water double-pipe evacuation is adopted; although this solution solves the disadvantage of draining cold water first when using hot water, due to the constant change of tap water pressure during water supply and the high floor and bottom water The unequal change of the head makes it difficult to balance the water flow of the upper and lower water: when the water flow of the upper water is greater than the water flow of the outlet, the water in the thermal insulation tank of the solar water heater will overflow; when the water flow of the upper water is smaller than the water flow of the outlet When using hot water, there will be a phenomenon of poor water flow; and, although the technical scheme can be emptied by double pipes at that time, because the solar thermal insulation water tank is in a state of full water, the next day, the water in the thermal insulation water tank will After being heated by the solar collector, the gap between water molecules increases, and the volume continues to expand (according to the daily temperature rise of 60°C, the volume of water increases by about 2-3%, and 2-3% of the water will overflow), according to 100 liters of thermal water tank calculation, will slowly overflow about 2-3 liters of water in the upper and lower water pipes. If in the cold winter, the amount of water overflowing slowly is enough to freeze the upper and lower water pipes, thus losing the practical significance of emptying.

To sum up, as far as the inventors know, the two generations of products of "flat solar water heater" and "vacuum collector tube solar water heater" released after the "stuffy solar water heater" in my country have been used by users for nearly 50 years. All are looking forward to the double-pipe solar water heater products that can be emptied with mature technology, reliable performance, stable and long-term operation, easy to use, and low price. Many manufacturers, organizations and individuals who research and develop solar energy have also paid a lot of hard work for this, and have introduced generations of various double-tube emptying technologies and products, but they have not been able to "break through" due to deviations in thinking. This layer of "window paper".

Contents of the invention

In order to solve the above-mentioned practical problems, the utility model provides a "top type constant pressure top water type double-pipe emptying antifreeze solar water heater".

The technical scheme adopted by the utility model to solve the technical problem is: an automatic water supply device for heat preservation and constant pressure and a siphon hot water pipe are added on the top of the existing water-falling solar water heater heat preservation water tank. The heat preservation and constant pressure automatic water supply device consists of a heat preservation and constant pressure automatic water supply tank, an end-face sealed large-flow float valve (the valve is a newly designed end-face seal large-flow float valve, and the buoyancy of the float only needs to overcome the friction of the valve body itself. , and the friction force is small and relatively constant, not affected by water pressure, therefore, the floating ball can be designed to be relatively small, so the volume of the replenishment tank can be made quite small and beautiful, and it can ensure that the water flow of different floors can be met Requirements, not affected by different floor heights.) and connected to take over and so on. The top of the heat preservation water tank of the solar water heater is equipped with a heat preservation constant pressure automatic water replenishment tank. With siphon hot water pipe. The lower part of the side of the heat preservation water tank of the solar water heater is provided with drainage, sewage connection pipes, drainage and sewage valves (when the valve is opened, it can be used for sewage discharge, and can also be used according to the operation mode of the existing water-falling solar water heater, except that the valve is closed). The heat preservation and constant pressure automatic water replenishment tank is equipped with a large flow float valve with end face sealing. The siphon mouth of the siphon hot water pipe is placed on the top in the thermal water tank of the solar water heater. Drainage, blowdown connecting pipe is connected with the middle part of siphon hot water pipe through draining, blowdown valve. The bottom of the thermal insulation constant pressure automatic water replenishment box body is connected with the top of the solar water heater thermal insulation water tank by a connecting pipe. When the program is running: open the tap water inlet valve, and the cold water is injected into the thermal insulation automatic constant pressure replenishment water tank from the upper water pipe through the end-face-sealed large-flow float valve, and enters the solar water heater thermal insulation water tank through the connecting pipe. When the solar water heater insulation water tank and the insulation constant pressure automatic water replenishment tank are full of water, the floating ball is floated to close the valve. This completes the initial hydration. At this time, close the water inlet valve, and then open the double-pipe emptying valve to empty the pipe. When the siphon hot water pipe is empty, open the hot water valve, and when the water level in the thermal insulation water tank of the solar water heater drops to the mouth of the siphon pipe, the siphon pipe is communicated with the atmosphere, and the inside of the pipe is emptied; When it is lowered to the end-face sealing float valve port, the upper water pipe is communicated with the atmosphere, and the upper water pipe is emptied. When using hot water, close the drain valve of the upper water pipe, open the water inlet valve, and the cold water will enter the solar water heater insulation water tank from the thermal insulation constant pressure automatic water supply tank through the connecting pipe, and the hot water in it will be pushed into the siphon hot water pipe, and the hot water will be released immediately. The siphon that has been emptied flows out for use, thereby solving the practical problem of needing to drain the cold water before using the hot water. At this time, the float valve is automatically adjusted to maintain constant pressure water supply: because the large flow float valve is used, the water flow in the fully open state of the valve is far greater than the water flow of the solar water heater, so that the float automatically adjusts the valve. The opening degree, so as to realize the demand of constant pressure water replenishment. After emptying, because the set siphon mouth is lower than the space volume in the system between the potential difference between the siphon ridges (referring to the volume that the thermal insulation constant pressure automatic water replenishment tank and the solar water heater thermal water tank are emptied.) The water storage capacity is equal to Or slightly larger than the water volume that the water in the heat preservation water tank of the solar water heater heats up and expands throughout the day, so when the double pipes are emptied, no overflowing water will enter the pipes and freeze the upper and lower water pipes. That is to say, the utility model "top type constant pressure top water type double pipe emptying antifreeze solar water heater" has been formed.

The beneficial effects of the utility model are: the existing solar water heater is equipped with simple physical and mechanical devices to make a new solar water heater, which can truly realize double-pipe emptying and antifreezing, and ensures the safety of the solar water heater in cold seasons. Normal operation and use saves energy; it also realizes the purpose of not needing to drain the cold water in the channel before using hot water, saving a lot of water resources. The implementation and application of the utility model will bring greater social and economic benefits to the society, benefit the people, and bring benefits and convenience to the majority of users.

Description of drawings

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

Accompanying drawing is the structural principle diagram of the utility model.

In the figure 1, water inlet valve, 2, upper water pipe emptying valve, 3, upper water pipe, 4, solar water heater heat preservation water tank, 5, connecting pipe, 6, floating ball, 7, end face sealing large flow floating ball valve, 8, heat preservation Constant pressure automatic water supply tank, 9. Inlet and exhaust pipes of thermal insulation constant pressure automatic water supply tank, 10. Intake and exhaust pipes of solar water heater insulation water tank, 11. Thermal insulation sleeve, 12. Siphon ridge, 13. Siphon mouth, 14. Siphon heat Water pipe, 15, drainage, sewage valve, 16, drainage, sewage connection, 17, hot water valve, 18, shower.

Detailed ways

In the accompanying drawings, (1) is a water inlet valve, and the inlet and exhaust pipes (9) of the heat preservation constant pressure automatic water replenishment tank are located on the top of the heat preservation constant pressure automatic water replenishment tank (8), and the solar water heater heat preservation water tank inlet and exhaust pipes (10 ) is located on the top of the solar water heater insulation water tank (4). When closing the upper water pipe emptying valve (2), drainage, sewage valve (15) and hot water valve (17), and opening the water inlet valve (1), tap water enters the heat preservation constant pressure automatic water replenishment tank ( 8), flow into the solar water heater insulation water tank (4) through the connecting pipe (5). Along with the continuous injection of water yield, the water level rises constantly to float (6) floats, and closes the large flow float valve (7) of end face sealing. At this time, the initial hydration is achieved. At this time, close the water inlet valve (1), you can open the upper water pipe emptying valve (2) and the hot water valve (17), and the double pipes are emptied. When the siphon hot water pipe (14) is empty, open the hot water valve (17), and when the water level in the solar water heater insulation tank (4) drops to the siphon mouth (13), the siphon hot water pipe (14) communicates with the atmosphere, and the siphon The hot water pipe (14) is emptied; when the upper water pipe (3) is emptied, when the water level in the thermal insulation constant pressure automatic water replenishment tank (8) drops to the end face sealing float valve port, the upper water pipe (3) communicates with the atmosphere, and the upper water pipe (3) Empty. When using hot water, close the drain valve (2) of the upper water pipe, open the water inlet valve (1), and the cold water will enter the thermal insulation water tank (4) of the solar water heater through the connecting pipe (5) through the end-face sealed large-flow float valve (7) Hot water wherein pushes into siphon hot water pipe (14), and hot water promptly empties siphon hot water pipe (14) to flow out from shower (18) and use. And at this moment, the end face sealing large flow ball float valve (7) promptly automatically adjusts to keep the constant pressure replenishing water. [When opening drainage, blowdown valve (15), solar water heater can be used as falling water type operation, and can carry out blowdown to solar water heater insulation water tank (4). ] After emptying, since the siphon mouth (13) is lower than the space volume in the system between the siphon ridges (12) (referring to the thermal insulation constant pressure automatic replenishment water tank (8) and the solar water heater insulation water tank (4) are Empty volume.) The water storage capacity is equal to or slightly greater than the water volume that the water in the solar water heater insulated water tank (4) heats up and expands throughout the day, so, after the siphon hot water pipe (14) and the upper water pipe (3) are emptied, There will no longer be overflowing water entering the pipe, ensuring that the double pipes will not be blocked by freezing, and ensuring the normal operation and use of the solar water heater throughout the year. Thereby realized the utility model " top type constant pressure top water type double pipe emptying antifreeze solar water heater ".

Claims (4)

1, a kind of " formula constant voltage top, top ability of swimming double pipe evacuation and anti-freezing solar water heater ", it is characterized in that: heat-preserving water tank for solar water heater (4) top is provided with insulation constant voltage automatic water supply tank (8), be provided with siphon hot-water line (14), heat-preserving water tank for solar water heater (4) bottom, side is provided with draining, blowdown connection (16), draining, blowoff valve (15).

2, " side formula constant voltage top ability of swimming double pipe evacuation and anti-freezing solar water heater " according to claim 1 is characterized in that: be provided with end face seal large flow ball float valve (7) in the insulation constant voltage automatic water supply tank (8).

3, " side formula constant voltage top ability of swimming double pipe evacuation and anti-freezing solar water heater " according to claim 1 is characterized in that: the siphon nozzle (13) of siphon hot-water line (14) places the top in the heat-preserving water tank for solar water heater (4).

4, according to claim 1 or 3 described " side formula constant voltage top ability of swimming double pipe evacuation and anti-freezing solar water heater ", it is characterized in that: draining, blowdown connection (16) are connected with the middle part of siphon hot-water line (14) through draining, blowoff valve (15).

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