CN201043818Y - Constant pressure top water type double pipe emptying antifreeze solar water heater - Google Patents

Abstract

A "constant pressure top water type double pipe emptying antifreeze solar water heater" involving automatic constant pressure water replenishment and double pipe emptying antifreeze of solar water heaters, which integrates the automatic constant pressure water replenishment of solar water heaters and the emptying and antifreeze of upper and lower water pipes, truly realizing the effective emptying and antifreeze of solar water heaters, thereby not only ensuring the normal operation of solar water heaters in cold seasons 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 lot of water resources. This new solar water heater is a transformation and upgrade of the old fall-type solar water heater.

Description

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 antifreezing, and provides a "constant-pressure top water type double-pipe emptying and antifreezing 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 existing practical problems, the utility model provides a "constant pressure top water type double-pipe emptying antifreeze solar water heater".

The technical solution adopted by the utility model to solve the technical problems is: the heat preservation constant pressure replenishing water tank is provided with an end-face sealing large-flow floating ball valve (this valve is a newly designed end-face sealing large-flow floating ball valve, and the buoyancy of the floating ball only needs to overcome The friction force of the valve body itself is relatively small and relatively constant, and is not affected by water pressure. Therefore, the floating ball can be designed to be relatively small, so the volume of the water supply tank can be made quite small and beautiful, and it can ensure Satisfy the requirements of the water flow of different floors, not affected by the different heights of the floors.). A siphon hot water pipe is provided, and the siphon mouth of the siphon hot water pipe is placed in the inlet and exhaust pipes of the heat preservation water tank of the solar water heater. The middle part of the siphon hot water pipe is connected with the lower part of the side of the thermal insulation water tank of the solar water heater through the drainage and sewage connection pipes. The operation mode of solar water heater is used, except that the valve is closed). When the program is running: open the tap water inlet valve, the cold water is injected into the thermal insulation constant pressure automatic water replenishment tank from the upper water pipe through the end-face sealed large-flow float valve, and enters the bottom of the solar water heater thermal insulation tank through the connecting pipe and the water inlet 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 inlet and exhaust pipes of the solar water heater heat preservation water tank drops to the mouth of the siphon pipe, the siphon hot water pipe is connected to the atmosphere and the inside of the pipe is emptied; when the upper water pipe is empty, the heat preservation constant When the water level in the automatic replenishment tank drops 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 bottom of the solar water heater insulation water tank from the thermal insulation constant pressure automatic water supply tank through the connecting pipe and the water inlet connecting pipe, and the hot water in it will be pushed into the siphon heat Water pipes, hot water flows out of the siphon that has been emptied for use, thus solving the practical problem of needing to drain cold water before using 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, since 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 thermal 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 "constant pressure top water type double pipe evacuation antifreeze solar water heater" is constituted.

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. water inlet connecting pipe, 6. connecting pipe, 7. floating ball, 8. end face seal Large flow float valve, 9. Insulation and constant pressure automatic water supply tank, 10. Inlet and exhaust pipes of heat preservation and constant pressure automatic water supply tank, 11. Inlet and exhaust pipe of solar water heater insulation water tank, 12. Insulation sleeve, 13. Siphon hot water pipe , 14, siphon ridge, 15, siphon mouth, 16, drainage, sewage valve, 17, drainage, sewage connection, 18, hot water valve, 19, shower.

Detailed ways

In the accompanying drawings, (1) is a water inlet valve, and the inlet and exhaust pipes (10) of the heat preservation constant pressure automatic water replenishment tank (10) are located on the top of the heat preservation constant pressure automatic water replenishment tank (9), and the solar water heater heat preservation water tank inlet and exhaust pipes (11 ) is located on the top of the solar water heater thermal water tank (4), and the siphon mouth (15) of the siphon hot water pipe (13) is placed in the solar water heater thermal water tank intake and exhaust pipe (11). When closing the upper water pipe emptying valve (2), drainage, sewage valve (16) and hot water valve (18), and opening the water inlet valve (1), tap water enters the heat preservation constant pressure automatic water replenishment tank ( 9), flow into the bottom of the solar water heater insulation water tank (4) through the connecting pipe (6) and the water inlet connecting pipe (5). Along with the continuous injection of water yield, the water level constantly rises until the floating ball (7) floats, and closes the end face sealing large flow floating ball valve (8). 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 (18), and the double pipes are emptied. When the siphon hot water pipe (13) was empty, the hot water valve (18) was opened, and when the water level in the inlet and outlet pipes (11) of the solar water heater thermal water tank dropped to the siphon mouth (15), the siphon hot water pipe (13) and The atmosphere is connected, and the siphon hot water pipe (13) is emptied; when the upper water pipe (3) is emptied, when the water level in the heat preservation constant pressure automatic water replenishment tank (9) drops to the end face sealing float valve port, due to the heat preservation constant pressure automatic water replenishment tank The effect of air inlet and outlet (10), upper water pipe (3) communicates with atmosphere, upper water pipe (3) is emptied. When using hot water at night, close the drain valve (2) of the upper water pipe, open the water inlet valve (1), and the cold water will be sealed by the end face of the large flow float valve (8) through the connecting pipe (6) and the water inlet connecting pipe (5) Enter the bottom of the solar water heater insulation water tank (4), push the hot water wherein into the siphon hot water pipe (13), and the hot water flows out and uses by the emptied siphon hot water pipe (13). And at this moment, the end face sealing large flow ball float valve (8) promptly automatically adjusts and keeps the constant pressure replenishing water. [When opening drainage, blowdown valve (16), solar water heater can be used as falling water formula operation, and can carry out blowdown to solar water heater insulation water tank (4). ] After emptying, since the siphon mouth (15) is lower than the space volume in the system between the siphon ridges (14) (referring to the heat preservation constant pressure automatic water replenishment tank (9) 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 (13) and the upper water pipe (3) are emptied, There will no longer be overflowing water entering the pipes, 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 " constant pressure top water type double-pipe evacuation antifreeze solar water heater ".

Claims (4)

1. one kind " constant voltage 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) upper side top is provided with insulation constant voltage automatic water supply tank (9), heat-preserving water tank for solar water heater (4) top is provided with siphon hot-water line (13), heat-preserving water tank for solar water heater air inlet-outlet pipe (11), and heat-preserving water tank for solar water heater (4) opposite side bottom is provided with draining, blowdown connection (17), draining, blowoff valve (16).

2. " 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 (8) in the insulation constant voltage automatic water supply tank (9).

3. " constant voltage top ability of swimming double pipe evacuation and anti-freezing solar water heater " according to claim 1, it is characterized in that: the siphon nozzle (15) of siphon hot-water line (13) is located in the heat-preserving water tank for solar water heater air inlet-outlet pipe (11).

4. according to claim 1 or 3 described " constant voltage top ability of swimming double pipe evacuation and anti-freezing solar water heater ", it is characterized in that: draining, blowdown connection (17) are connected with siphon hot-water line (13) through draining, blowoff valve (16).

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