A water tankless vacuum solar collector

Abstract

The present invention relates to a novel water tankless vacuum solar collector, comprising a plurality of all-glass vacuum solar collector tubes, a pressure relief pipe is arranged on the pressure bearing cover of several or one all-glass vacuum solar collector tubes, a pressure relief safety valve is connected to the pressure relief pipe, a connecting channel inlet is correspondingly connected to the pressure relief safety valve, and the connecting channel outer port is divided into two ways to respectively connect an upper pressure relief channel and a lower pressure relief channel, the upper pressure relief channel is inclined upward and opens directly to the atmosphere from the upper end face of the upper insulation layer, and the lower pressure relief channel is inclined downward and opens directly to the atmosphere from any side of the upper insulation layer. It has a simple structure, is easy to empty, maintain and clean, can effectively prevent the water tankless vacuum solar collector from freezing and blocking the pressure relief outlet and causing an overpressure accident when used in a cold environment, and is safe and reliable to use.

Description

Technical Field

[0001] The invention relates to a solar water heater, in particular to a water tank-free vacuum solar thermal collector. Background Art

[0002] The applicant's previously obtained patent ZL200510095034.4 disclosed the all-weather tankless pressurized solar water heater) and the patent ZL200910181645.9 disclosed the tankless solar water heater heat collection module. After years of use experience, it has been proved that when the vacuum pipe mouth is tilted upside down or downward, the natural downward transfer capacity of the heat in the pipe is very limited; especially in severe cold weather, once the power is cut off, it is very easy to cause the pressure relief pipe and control parts in the vacuum tube sealing cover to freeze, resulting in the inability to discharge the pressure increase caused by the temperature rise in the sealed vacuum tube, causing overpressure and explosion damage; and because the product is a special structure of several tubes connected in series, the traditional method of setting a sewage outlet for water tank water heaters cannot be applied. The water or precipitated dirt in the tube is not easy to be discharged, which will cause trouble for cleaning and maintenance in the future. Summary of the invention

[0003] The present invention provides a water tankless vacuum solar thermal collector with a simple structure, which is convenient for emptying, maintenance and cleaning, and can effectively prevent pipe burst accidents caused by freezing and overpressure of the pressure relief outlet when the water tankless vacuum solar thermal collector is used in a cold environment, thereby ensuring safe and reliable use.

[0004] The technical solution adopted by the present invention is: a water tankless vacuum solar collector, comprising multiple full-glass vacuum solar collector tubes, upper and lower insulation layers, multiple full-glass vacuum solar collector tubes are arranged in parallel and their upper and lower parts are respectively placed in the upper and lower insulation layers, the upper ends of the multiple full-glass vacuum solar collector tubes are all packaged by a pressure-bearing cover placed in the upper insulation layer, long tubes and short tubes are passed through the two sides of the pressure-bearing cover, and the multiple full-glass vacuum solar collector tubes are connected in series through the short tube of the previous pressure-bearing cover and the long tube of the rear pressure-bearing cover in sequence, characterized in that: a pressure relief pipe is provided on the pressure-bearing cover of the full-glass vacuum solar collector tube, the upper end of the pressure relief pipe is connected to the inlet of the pressure relief safety valve, the outlet of the pressure relief safety valve in the upper insulation layer is connected to the inlet of the connecting channel, the outlet of the connecting channel is divided into two ways to respectively connect the upper pressure relief channel and the lower pressure relief channel, the upper pressure relief channel is inclined upward and connected to the atmosphere through the upper end face opening of the upper insulation layer, and the lower pressure relief channel is inclined downward and connected to the atmosphere through any side opening of the upper insulation layer.

[0005] Furthermore, the pressure-bearing cover and the upper insulation layer are a foamed combined structure.

[0006] Furthermore, the long conduit extends to the lower part of the all-glass vacuum solar heat collecting tube, the lower part of the long conduit is connected to a plastic hose, and the plastic hose is attached to the bottom of the all-glass vacuum solar heat collecting tube.

[0007] Furthermore, the short conduit is inserted into the all-glass vacuum solar heat collecting tube at the lower end and maintained at a certain length.

[0008] Furthermore, the plurality of all-glass vacuum solar heat collecting tubes are sequentially connected in series through a front pressure-bearing cover short conduit through a connecting pipe and a rear pressure-bearing cover long conduit.

[0009] Furthermore, the plurality of all-glass vacuum solar heat collecting tubes are supported by the lower insulation layer and are placed horizontally or with the tube openings facing upwards.

[0010] Furthermore, the long conduit of the first all-glass vacuum solar heat collecting tube of the plurality of all-glass vacuum solar heat collecting tubes is externally connected to the water inlet pipe, and the short conduit of the last all-glass vacuum solar heat collecting tube is externally connected to the water outlet pipe.

[0011] The beneficial effects of the present invention are:

[0012] 1. Multiple all-glass vacuum solar collector tubes are supported by the lower insulation layer and placed horizontally or with the tube mouth facing upward. The solar vacuum tube collector has an overall installation angle. After the all-glass vacuum solar collector tube is sealed and pressurized, it should be installed with the tube tail as the origin, and the angle between the tube body and the horizontal plane should be installed within the range of 0-90 degrees; the water storage heat in the vacuum collector tube is normally transferred upward, and its own heat protects the pipe fittings and functional parts on its pressure cover from freezing and failure, ensuring the normal and safe use of the collector, which is conducive to extending the service life.

[0013] 2. The inlet of the short conduit extends into the all-glass vacuum solar collector tube and maintains a certain length, forming a small buffer air chamber in the collector tube; when connected to an adjacent long conduit through a connecting pipe, it is normally used to discharge hot water from each all-glass vacuum solar collector tube. The length of the short conduit extending into the all-glass vacuum solar collector tube is determined by the size of the required air chamber. When the collector is in a pressure-free state as a whole, its lower port is level with the water storage level in the all-glass vacuum solar collector tube. When the collector is in water supply or water use, pressurized cold water enters from the first long conduit, and in turn flows from the top of the short conduit to the next long conduit, until the hot water outlet is discharged from the top of the short conduit of the last vacuum tube. By limiting the length of the short conduit, when the collector is filled with water or heated under pressure, the air chamber can buffer the instantaneous impact force or heating expansion pressure from the tap water, and play a protective role of the expansion tank.

[0014] 3. The long conduit is normally used as the water inlet of each all-glass vacuum solar collector tube. It is connected to a high-temperature and aging-resistant plastic hose near the bottom of the vacuum tube. The plastic hose is safely close to the bottom of the all-glass vacuum solar collector tube. When it is necessary to inspect and drain the sewage or empty the water in the collector after long-term use, pressurized tap water can be added from the hot water outlet of the collector to push out all the dirt from the hot water inlet and keep it clean; if pressurized air is added from the water outlet, the water can be emptied from the hot water inlet of the collector.

[0015] 4. The all-glass vacuum solar collector tube is equipped with a pressure relief safety valve, whose outlet is connected to the connecting channel and the inlet is connected to the pressure relief pipe. The pressure relief safety valve is pre-set with the pressure value for automatic opening and closing, and is installed on the pressure-bearing cover. The pressure relief safety valve releases pressure to the pressure relief connecting channel and then splits into two paths. When the overall collector is horizontal and the pipe mouth is tilted upward or vertically installed, the upper pressure relief channel is upward and the lower pressure relief channel is downward. The exhaust gas is discharged upward through the upper pressure relief channel, and the condensed water is discharged downward through the lower pressure relief channel. The structure of the upper and lower double outlets can meet the normal and safe pressure relief use under different installation angles and use environments, effectively preventing the occurrence of water vapor adsorption and freezing blockage at the outlet in severe cold environments, which is conducive to improving the safety of use and service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the present invention;

[0017] Figure 2 for Figure 1 Left view of;

[0018] Figure 3 for Figure 2 Medium AA view.

[0019] In the figure: lower insulation layer 1, upper insulation layer 2, all-glass vacuum solar collector tube 3, long conduit 4, plastic hose 5, short conduit 6, connecting pipe 7, pressure relief pipe 8, pressure relief safety valve 9, connecting channel 10, upper pressure relief channel 11, lower pressure relief channel 12. DETAILED DESCRIPTION

[0020] The invention is further described below with reference to the accompanying drawings and embodiments.

[0021] Figure 1-3As shown: a water tankless vacuum solar collector comprises a lower insulation layer 1, an upper insulation layer 2, an all-glass vacuum solar heat collection tube 3, a long guide tube 4, a plastic hose 5, a short guide tube 6, a connecting tube 7, and a pressure relief safety valve 9. A plurality of all-glass vacuum solar heat collection tubes 3 are arranged in parallel and their upper and lower parts are placed in the upper and lower insulation layers 2 and 1 respectively. The plurality of all-glass vacuum solar heat collection tubes are supported by the lower insulation layer and are placed horizontally or with the tube mouths inclined or facing upwards; the upper ends of the plurality of all-glass vacuum solar heat collection tubes 3 are all packaged with the pressure-bearing cover structure in the upper insulation layer 2, and the long guide tube 4 and the short guide tube 6 extending into the all-glass vacuum solar heat collection tube 3 are connected on both sides of the pressure-bearing cover structure, the long guide tube 4 extends to the lower part of the all-glass vacuum solar heat collection tube 2, the lower part of the long guide tube 4 is connected to the plastic hose 5, and the plastic hose is attached to the bottom of the all-glass vacuum solar heat collection tube, the lower end of the short guide tube 6 is inserted into the all-glass vacuum solar heat collection tube and retains a certain length, and the plurality of all-glass vacuum solar heat collection tubes 3 are connected to the pressure-bearing cover structure. The long conduit of the first all-glass vacuum solar collector tube of the heat pipe is connected to the water inlet pipe, and the short conduit of the last all-glass vacuum solar collector tube is connected to the water outlet pipe; multiple all-glass vacuum solar collector tubes 3 are connected in series through the short conduit of the previous pressure cover through the connecting pipe 7, and the long conduit of the rear pressure cover is passed through the connecting pipe 7. A pressure relief pipe 8 is provided on the pressure cover structure of the all-glass vacuum solar collector tube. The pressure relief pipe 8 is connected to the pressure relief safety valve 9. The pressure relief safety valve 9 in the upper insulation layer is connected to the connecting channel 10. The connecting channel 10 is connected with the upper pressure relief channel 11 and the lower pressure relief channel 12 respectively. The upper pressure relief channel is inclined upward and opens from the upper end surface of the upper insulation layer to the atmosphere, and the lower pressure relief channel is inclined downward and opens from any side of the upper insulation layer to the atmosphere.

[0022] In the above embodiment, a pressure relief safety valve is arranged on the all-glass vacuum solar collector tube. In actual use, other collector tubes or all of them can be selected as needed.

[0023] Finally, it should be noted that in the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on this patent.

[0024] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A water tankless vacuum solar collector, comprising a plurality of all-glass vacuum solar collector tubes, upper and lower insulation layers, wherein the plurality of all-glass vacuum solar collector tubes are arranged in parallel and the upper and lower parts thereof are respectively placed in the upper and lower insulation layers, the upper ends of the plurality of all-glass vacuum solar collector tubes are all packaged by a pressure-bearing cover placed in the upper insulation layer, the two sides of the pressure-bearing cover are connected with a long conduit and a short conduit, and the plurality of all-glass vacuum solar collector tubes are connected in series by sequentially passing through the short conduit of the previous pressure-bearing cover and the long conduit of the next pressure-bearing cover, characterized in that: A pressure relief pipe is provided on the pressure cover of several or one all-glass vacuum solar collector tubes, the upper end of the pressure relief pipe is connected to the inlet of the pressure relief safety valve, the outlet of the pressure relief safety valve in the upper insulation layer is connected to the inlet of the connecting channel, and the outlet of the connecting channel is divided into two ways to respectively connect the upper pressure relief channel and the lower pressure relief channel, the upper pressure relief channel is inclined upward and opens from the upper end surface of the upper insulation layer to the atmosphere, and the lower pressure relief channel is inclined downward and opens from any side of the upper insulation layer to the atmosphere; the long conduit extends to the lower part of the all-glass vacuum solar collector tube, the lower part of the long conduit is connected to a plastic hose, and the plastic hose is attached to the bottom of the all-glass vacuum solar collector tube; the multiple all-glass vacuum solar collector tubes are sequentially connected in series through the short conduit of the previous pressure cover and the connecting pipe through the long conduit of the rear pressure cover.

2. The tankless vacuum solar collector according to claim 1 is characterized in that: The pressure-bearing cover and the upper thermal insulation layer are a combined structure.

3. The tankless vacuum solar collector according to claim 1 is characterized in that: The lower end of the short guide tube is inserted into the full-glass vacuum solar heat collecting tube to maintain a certain length.

4. The tankless vacuum solar collector according to claim 1 is characterized in that: The multiple all-glass vacuum solar heat collecting tubes are supported by the lower insulation layer, and the tube openings are placed horizontally or tilted upwards.

5. The tankless vacuum solar collector according to claim 1 is characterized in that: The long conduit of the first all-glass vacuum solar heat collecting tube of the plurality of all-glass vacuum solar heat collecting tubes is externally connected to the water inlet pipe, and the short conduit of the last all-glass vacuum solar heat collecting tube is externally connected to the water outlet pipe.

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