CN114484896A - Flat integrated solar water heater - Google Patents

Abstract

The invention discloses a flat-plate integrated solar water heater, which comprises a water tank, a support, a flat-plate solar collector, a water inlet pipeline, a water outlet pipeline and a copper heat pipe, wherein the flat-plate solar collector, the water inlet pipeline and the water outlet pipeline are fixed on the support, a blind pipe is welded at the lower part of a liner of the water tank, the blind pipe extends into the liner, the flat-plate solar collector comprises a shell, a glass cover plate, a heat absorber and a heat insulator arranged between the heat absorber and the shell, the heat absorber comprises an upper collecting pipe, a lower collecting pipe, a calandria and a heat absorbing plate, a plurality of sleeves which vertically penetrate through the upper collecting pipe and correspond to the blind pipes are arranged on a pipe section of the upper collecting pipe, an evaporation section of the copper heat pipe is inserted into the sleeves, and a condensation section of the copper heat pipe is inserted into the blind pipe.

Description

Flat integrated solar water heater

technical field

The invention relates to the field of solar thermal utilization, in particular to a closed solar water heater.

Background technique

In the existing residential buildings, most of the solar water heaters installed on the roof are vacuum tube type compact solar water heaters, which have the characteristics of not occupying indoor space and excellent thermal performance, but the water outlet pressure depends on the floor drop. Inside, a booster pump needs to be installed to prevent the water outlet pressure from being too low. When the vacuum tube is accidentally damaged, the water heater cannot be used. It is necessary to close the valves of the water supply pipeline and the water pipeline for maintenance. Flat-plate solar collectors are more and more used in the balcony split solar water heating systems of high-rise buildings, which have the characteristics of impact resistance, beautiful appearance and easy building integration. The balcony split solar water heating system has the characteristics of high water outlet pressure and frost resistance, but the system is a split structure, the water tank occupies indoor space, the pipeline connecting the water tank and the collector is long, and the balcony wall needs to be embedded with steel casing , the installation inclination of the collector is limited, the heat gain of the system is low, and the thermal performance is poor.

To sum up, how to combine the advantages of both compact solar water heaters and flat-panel solar collectors to design a flat-panel integrated solar water heater with compact structure, anti-freezing and shock resistance, good system thermal performance and high water outlet pressure, become an urgent problem to be solved in the industry.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to provide a flat-panel integrated solar water heater with compact structure, impact resistance, frost resistance, good system thermal performance and water outlet pressure, aiming at the above-mentioned deficiencies of the prior art.

In order to solve the above technical problems, the technical solution adopted in the present invention is: including a water tank, a bracket, a flat-plate solar collector fixed on the bracket, a water inlet pipeline and a water outlet pipeline, and also a copper heat pipe, and the water tank shell is provided with a There is a closed inner tank, the lower part of the inner tank is welded with a blind pipe, the blind pipe extends into the inner tank, the top of the blind pipe is closed, and the bottom opening faces the flat-type solar collector, the flat-type solar collector It includes a shell, a glass cover, a heat sink and an insulator arranged between the heat sink and the shell. The heat sink includes an upper header, a lower header, a row pipe and a heat absorption plate. The headers are arranged in parallel with the lower headers, the headers are connected with the upper headers and the lower headers by vertical welding, the heat absorbing plate is welded on the headers, one end of the upper header is provided with a liquid inlet, and the pipe section of the upper header There are a plurality of sleeves corresponding to the dead pipes vertically penetrating the upper header, the sleeves are not communicated with the upper header, the lower end of the sleeve is constricted, and the upper end opening faces the outside of the casing, and the upper end of the casing is open. A socket corresponding to the sleeve is opened, the evaporation section of the copper heat pipe is inserted into the sleeve, and the condensation section of the copper heat pipe is inserted into the blind pipe. The medium is injected into the heat-absorbing body, and the heat absorbed by the heat-absorbing plate is transferred to the exhaust pipe, and then transferred to the casing.

Preferably, the other end of the upper header is provided with an exhaust port, and an expansion tank is connected to the liquid inlet. The exhaust port is used for exhaust during the medium injection process, and the expansion tank is used to absorb the expansion of the medium to prevent the pressure from being too high.

Preferably, the heat sink further includes a return pipe, the return pipe is disposed on one side or both sides of the heat sink, and the return pipe is connected to the upper header and the lower header by welding. No heat absorbing plates or selective absorbing coatings are provided on the return line.

The beneficial effects of the present invention are:

1. The inner tank is closed, the water outlet pressure is close to the tap water supply pressure, the bathing is comfortable, the water circuit and the heat collection circuit are separated, and the water quality is clean;

2. Blind pipes and sleeves are used for heat exchange between the heat sink and the water tank, with two heat transfer forms of convection and conduction, and the heat exchange is efficient. The copper heat pipe directly transfers the heat absorbed by the flat-panel solar collector to the water tank. The connected pipes are omitted, the structure is compact, and the cost is saved;

3. The return pipe is arranged on one side or both sides of the heat absorbing body. The heat absorbed by the heat absorbing plate is transferred to the exhaust pipe. The temperature of the exhaust pipe is relatively high. The effect of thermosiphon improves the efficiency of the natural circulation of the medium in the endothermic body.

Description of drawings

FIG. 1 is a schematic structural diagram of a flat-panel integrated solar water heater of the present invention.

FIG. 2 is a schematic structural diagram of a flat-plate solar heat collector of a flat-plate integrated solar water heater of the present invention.

In the figure, 1: water tank; 2: bracket; 3: flat-plate solar collector; 4: copper heat pipe; 5: expansion tank; 101: inner tank; 102: blind pipe; 301: shell; 302: glass cover 303: liquid inlet; 304: upper header; 305: exhaust pipe; 306: return pipe; 307: lower header; 308: heat absorption plate; 309: casing; 310: exhaust port.

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings.

As shown in Figures 1 and 2, the flat-panel integrated solar water heater includes a water tank 1, a bracket 2, a flat-plate solar collector 3 fixed on the bracket 2, a water inlet pipeline and a water outlet pipeline, and also includes a copper heat pipe 4. The outer shell of the water tank 1 is provided with a closed inner bladder 101, the lower part of the inner bladder 101 is welded with a blind tube 102, the blind tube 102 extends into the inner bladder 101, the top of the blind tube 102 is closed, and the bottom opening faces the flat plate type. Solar thermal collector 3, the flat-plate solar thermal collector 3 includes a casing 301, a glass cover 302, a heat sink and an insulator disposed between the heat sink and the casing 301, the heat sink includes The upper header 304, the lower header 307, the row pipe 305 and the heat absorbing plate 308, the upper header 304 and the lower header 307 are arranged in parallel, and the row pipe 305 is in vertical welding communication with the upper header 304 and the lower header 307, The heat absorbing plate 308 is welded on the pipe 305, one end of the upper header 304 is provided with a liquid inlet 303, and the pipe section of the upper header 304 is provided with a plurality of vertically penetrating the upper header 304 corresponding to the dead pipe 102 The sleeve 309 is not communicated with the upper header 304, the lower end of the sleeve 309 is constricted, and the upper end is open to the outside of the casing 301, and the casing 301 is provided with a socket corresponding to the sleeve 309 The evaporating section of the copper heat pipe 4 is inserted into the casing 309 , and the condensation section of the copper heat pipe 4 is inserted into the dead pipe 102 . The medium is injected into the heat sink, and the heat absorbed by the heat sink 308 is transferred to the exhaust pipe 305, and then transferred to the sleeve 309. Through the action of the copper heat pipe 4, the heat is transferred to the blind pipe 102, and then the inner tank 101 is heated. of water.

Further, the other end of the upper header 304 is provided with an exhaust port 310 , and an expansion tank 5 is connected to the liquid inlet 303 . The exhaust port 310 is used for exhaust during the medium injection process, and the expansion tank 5 is used for absorbing the expansion of the medium to prevent the pressure from being too high.

Further, the heat sink further includes a return pipe 306 , the return pipe 306 is disposed on one side or both sides of the heat sink, and the return pipe 306 is connected to the upper header 304 and the lower header 307 by welding. No heat absorbing plate 308 or selective absorbing coating is provided on the return line 306 . During the heat collection operation, after the medium in the exhaust pipe 305 absorbs heat, the temperature rises, enters the upper header 304, exchanges heat in the upper header 304 and sinks, passes through the return pipe 306, and returns to the lower header 307 to This cycle repeats.

Claims (3)

1. A flat-panel integrated solar water heater, including a water tank, a bracket, a flat-plate solar collector fixed on the bracket, a water inlet pipeline and a water outlet pipeline, and is characterized in that: it also includes a copper heat pipe, and the water tank shell is provided with a closed The bottom of the inner tank is welded with a blind tube, the blind tube extends into the inner tank, the top of the blind tube is closed, and the bottom opening faces the flat-plate solar collector, and the flat-type solar collector includes a shell body, a glass cover, a heat absorbing body and an insulator disposed between the heat absorbing body and the shell, the heat absorbing body includes an upper header, a lower header, a row pipe and a heat absorbing plate, the upper header It is arranged in parallel with the lower header, the drain is connected with the upper header and the lower header by vertical welding, the heat absorption plate is welded on the drain, one end of the upper header is provided with a liquid inlet, and the pipe section of the upper header is provided with a liquid inlet. There are a plurality of sleeves corresponding to the dead pipes vertically penetrating the upper header. The sleeves are not communicated with the upper header. The socket corresponding to the casing, the evaporation section of the copper heat pipe is inserted into the casing, and the condensation section of the copper heat pipe is inserted into the blind pipe. 2 . The flat plate integrated solar water heater according to claim 1 , wherein the other end of the upper header is provided with an exhaust port, and an expansion tank is connected to the liquid inlet. 3 . 3 . The flat plate integrated solar water heater according to claim 1 , wherein the heat absorbing body further comprises a return pipe, the return pipe is arranged on one side or both sides of the heat absorbing body, and the return pipe is connected to the upper collector. 4 . The tube and the lower header are welded and communicated.

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