CN111664598A - Solar water heating system - Google Patents

Solar water heating system Download PDF

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Publication number
CN111664598A
CN111664598A CN202010558494.0A CN202010558494A CN111664598A CN 111664598 A CN111664598 A CN 111664598A CN 202010558494 A CN202010558494 A CN 202010558494A CN 111664598 A CN111664598 A CN 111664598A
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CN
China
Prior art keywords
heat
solar
pipe
tank
collector
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202010558494.0A
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Chinese (zh)
Inventor
范伟锋
陈平
叶妮
黄斌
雷卫良
伍志国
王金勇
陈业庚
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhuhai China Construction Xingye Green Building Design Institute Co ltd
China Shuifa Xingye Energy Group Co ltd
Shuifa Xingye Energy Zhuhai Co Ltd
Zhuhai Singyes Renewable Energy Technology Co Ltd
Zhuhai Singyes Green Building Technology Co Ltd
Original Assignee
Zhuhai China Construction Xingye Green Building Design Institute Co ltd
China Shuifa Xingye Energy Group Co ltd
Shuifa Xingye Energy Zhuhai Co Ltd
Zhuhai Singyes Renewable Energy Technology Co Ltd
Zhuhai Singyes Green Building Technology Co Ltd
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Publication date
Application filed by Zhuhai China Construction Xingye Green Building Design Institute Co ltd, China Shuifa Xingye Energy Group Co ltd, Shuifa Xingye Energy Zhuhai Co Ltd, Zhuhai Singyes Renewable Energy Technology Co Ltd, Zhuhai Singyes Green Building Technology Co Ltd filed Critical Zhuhai China Construction Xingye Green Building Design Institute Co ltd
Priority to CN202010558494.0A priority Critical patent/CN111664598A/en
Publication of CN111664598A publication Critical patent/CN111664598A/en
Pending legal-status Critical Current

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24SSOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S60/00Arrangements for storing heat collected by solar heat collectors
    • F24S60/30Arrangements for storing heat collected by solar heat collectors storing heat in liquids
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24SSOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S50/00Arrangements for controlling solar heat collectors
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00Integration of renewable energy sources in buildings
    • Y02B10/20Solar thermal
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/40Solar thermal energy, e.g. solar towers

Abstract

The application provides a solar water heating system, includes: a solar heat collector; the circulating pipeline is connected with the solar heat collector and is provided with a circulating pump for circulating the heat medium in the solar heat collector; the household heat storage water tank is arranged on a circulation path of the circulation pipeline and exchanges heat with a heat medium circulating in the circulation pipeline; the liquid storage tank is arranged above the solar heat collector and communicated with the outside, and is used for storing a heat medium; one end of the expansion pipe is connected to the liquid storage tank, the other end of the expansion pipe is respectively communicated with the circulating pipeline and the solar thermal collector, the expansion pipe is used for allowing heat medium in the circulating pipeline and/or the solar thermal collector to expand and enter the liquid storage tank, and the heat medium in the liquid storage tank can enter the circulating pipeline and the solar thermal collector through the expansion pipe. The solar water heating system of this embodiment can the normal pressure operation, and operating pressure is little, and heat exchange efficiency is high, and the volatilization of heat medium and heat dissipation are low, and cost and operation cost are low, and system safe and reliable.

Description

Solar water heating system
Technical Field
The application belongs to the technical field of solar equipment, and more specifically relates to a solar water heating system.
Background
Aiming at a solar centralized heat collection household heat storage hot water system, the two types are mainly used at present:
the open type normal-pressure hot water system is composed of a solar heat collector, a buffer water tank, a household heat storage water tank, a circulating pipeline and a circulating water pump, and has the main defects that the buffer water tank, the corresponding circulating pipeline and the circulating water pump are added, the manufacturing cost of the hot water system is increased, and meanwhile, the power consumption of the hot water system is also increased. In addition, the buffer water tank also participates in heat exchange work, the heat medium in the buffer water tank is easy to vaporize and volatilize when the temperature rises, the heat medium needs to be added continuously, and the later-stage operation cost is increased. And, buffer tank's setting has increased thermal giving off, and in the course of the work, buffer tank is heated earlier to the heat that solar collector collected, and rethread buffer tank and branch family heat storage water tank heat transfer, and heat exchange efficiency is very low, has caused very big energy waste.
The other type is a closed pressure-bearing hot water system consisting of a solar heat collector, an expansion tank, a household heat storage water tank, a circulating pipeline and a circulating water pump, when the solar heat collector is heated in the daytime, the temperature of a heat medium in the solar heat collector rises and the volume of the heat medium increases, expansion pressure can be generated on the solar heat collector and the circulating pipeline, the expansion tank can only absorb part of the increased pressure, the whole hot water system still has the danger of high temperature and high pressure, the problems of pipe explosion of the system, heat medium leakage, heat collection failure and the like are easily generated, the use risk is very high, and the service life of the hot water system. In addition, the expansion tank has higher manufacturing cost and increases the cost.
Disclosure of Invention
One of the purposes of the embodiment of the application is as follows: the utility model provides a solar water heating system, aims at solving among the prior art, hot water system's heat medium volatilizees fast, heat exchange efficiency is low and the technical problem that the use risk is high.
In order to solve the technical problem, the embodiment of the application adopts the following technical scheme:
there is provided a solar water heating system comprising:
a solar heat collector;
the circulating pipeline is connected with the solar heat collector and is provided with a circulating pump for circulating the heat medium in the solar heat collector;
the household heat storage water tank is arranged on a circulation path of the circulation pipeline and exchanges heat with a heat medium circulating in the circulation pipeline;
the liquid storage tank is arranged above the solar heat collector and communicated with the outside, and is used for storing a heat medium;
one end of the expansion pipe is connected with the liquid storage tank, the other end of the expansion pipe is communicated with the circulating pipeline and the solar thermal collector respectively, the expansion pipe is used for supplying the circulating pipeline and/or the heat medium in the solar thermal collector enters the liquid storage tank during expansion, and the heat medium in the liquid storage tank can enter the circulating pipeline and the solar thermal collector through the expansion pipe.
In one embodiment, the liquid storage tank is provided with an anti-volatilization tube which is respectively communicated with the inside and the outside of the liquid storage tank, and an opening at one end, far away from the liquid storage tank, of the anti-volatilization tube is arranged downwards.
In one embodiment, the anti-volatilization tube extends spirally upward.
In one embodiment, the solar heat collector has a first liquid outlet end and a first liquid inlet end, the circulation pipeline is connected to the first liquid inlet end and the first liquid outlet end respectively, and one end of the expansion pipe far away from the liquid storage tank is connected to the circulation pipeline and arranged at the first liquid outlet end.
In one embodiment, the solar water heating system further comprises:
the first detection device is arranged on the circulating pipeline and positioned at the first liquid outlet end so as to obtain the temperature of the first liquid outlet end;
the second detection device is arranged on the circulating pipeline and is positioned at the first liquid inlet end so as to obtain the temperature of the first liquid inlet end;
and the electric controller is respectively and electrically connected with the circulating pump, the first detection device and the second detection device, and can judge the temperature difference between the temperature obtained by the first detection device and the temperature obtained by the second detection device to control the circulating pump.
In one embodiment, the circulation pipe includes:
the water supply pipe is connected with the solar heat collector and the expansion pipe and is connected with the household heat storage water tank so as to output a heat medium to the household heat storage water tank;
the same-pass pipe is connected with the household heat storage water tank to receive the heat medium output from the household heat storage water tank;
and the two ends of the water return pipe are respectively connected to one end of the same-path pipe and the solar heat collector.
In one embodiment, the household heat storage water tank comprises a first tank body and a heat exchange tube arranged in the first tank body, the heat exchange tube is provided with a second liquid inlet end and a second liquid outlet end, the second liquid inlet end is connected to the water feeding tube, and the second liquid outlet end is connected to the co-path tube.
In one embodiment, a first exhaust valve is arranged on the water supply pipe, and a second exhaust valve is arranged on the same-path pipe.
In one embodiment, the number of the circulating pumps is two, and the two circulating pumps are connected to the circulating pipeline in parallel.
In one embodiment, the liquid storage tank comprises a second tank body, a liquid supplementing port for injecting a heating medium is formed in the second tank body, and a tank cover is arranged on the liquid supplementing port in a covering mode.
The application provides a solar water heating system's beneficial effect lies in: compared with the prior art, this application sets up the liquid reserve tank through the top at solar collector, the liquid reserve tank passes through the expansion pipe and connects in circulating line and solar collector, can get into in the liquid reserve tank through expansion pipe upflow during the heat medium pressure boost expansion in solar collector and/or the circulating line, realize solar collector and/or circulating line's pressure release, and the liquid reserve tank communicates in the external world, thereby make solar collector can work under the ordinary pressure state, solar collector and circulating line's operating pressure has been reduced, avoid appearing the system and explode the pipe, heat medium reveals and the thermal-arrest inefficacy scheduling problem, whole system's security performance is improved. In addition, the circulating pump is used for driving the heating medium in the circulating pipeline to forcibly heat and exchange heat between the solar thermal collector and the household heat storage water tank, the heat exchange efficiency is high, the liquid storage tank does not exchange heat with the solar thermal collector, the temperature of the heating medium in the liquid storage tank is low, the condition of vaporization and volatilization of the heating medium is reduced, the heat emission of the system is reduced, the heat exchange efficiency is improved, and the manufacturing cost and the operation cost are reduced.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of a solar water heating system provided in an embodiment of the present application;
fig. 2 is a schematic structural diagram of a liquid storage tank of a solar water heating system provided in an embodiment of the present application.
Wherein, in the figures, the respective reference numerals:
10-a solar heat collector; 11-a first liquid outlet end; 12-a first inlet end; 20-a circulation pipe; 21-a water supply pipe; 22-a co-pass tube; 23-a water return pipe; 30-household heat storage water tanks; 31-a first box; 32-heat exchange tubes; 321-a second liquid inlet end; 322-second liquid outlet end; 40-a liquid storage tank; 41-a second box; 411-fluid infusion port; 42-box cover; 50-an expansion pipe; 60-anti-volatilization tube; 61-opening; 70-a first detection device; 80-a second detection device; 90-an electric controller; 100-a circulating pump; 110-a first exhaust valve; 120-a second exhaust valve; 130-gate valve.
Detailed Description
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application.
In the description of the present application, it is to be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present application.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," "connected," and the like are to be construed broadly and can, for example, be fixedly connected or detachably connected or integrated; can be mechanically or electrically connected; the two components can be directly connected or indirectly connected through an intermediate medium, and can be communicated with each other inside the two components or in an interaction relationship of the two components; similarly, "communication" may be direct communication or indirect communication through an intermediate medium. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In order to explain the technical solutions of the present application, the following detailed descriptions are made with reference to specific drawings and examples.
Referring to fig. 1, a solar water heating system provided by an embodiment of the present application will be described. The embodiment of the application provides a solar water heating system is an open normal pressure hot water system, and comprises a solar heat collector 10, a circulating pipeline 20, a household hot water storage tank 30, a liquid storage tank 40 and an expansion pipe 50. The solar collector 10 is used for collecting solar energy and generating heat to heat the heat medium in the solar collector 10. Both ends of the circulation pipe 20 are respectively connected to the solar thermal collector 10, a circulation pump 100 is provided on the circulation pipe 20, and the circulation pump 100 is used for circulating the heat medium in the circulation solar thermal collector 10 between the circulation pipe 20 and the solar thermal collector 10. The household heat storage water tank 30 is disposed on the circulation path of the circulation pipeline 20, and when the heat medium circulates between the circulation pipeline 20 and the solar heat collector 10, the heat medium can exchange heat with the cold water in the household heat storage water tank 30 through the household heat storage water tank 30, that is, the heat medium circulates between the solar heat collector 10 and the household heat storage water tank 30 through the circulation pipeline 20. Liquid storage tank 40 is located solar collector 10 and circulating line 20's top, and liquid storage tank 40 is used for storing heat medium, and expansion pipe 50 one end is connected in liquid storage tank 40, and the expansion pipe 50 other end is connected in circulating line 20 and solar collector 10, and heat medium in the liquid storage tank 40 can get into in circulating line 20 and the solar collector 10 through expansion pipe 50. During operation, the heat medium in the liquid storage tank 40 flows through the expansion pipe 50 under the action of gravity to fill the solar heat collector 10 and the circulation pipeline 20, after the heat medium in the solar heat collector 10 is heated, the circulation pump 100 drives the heat medium to flow in the circulation pipeline 20 and pass through the household heat storage water tank 30 so as to exchange heat with cold water in the household heat storage water tank 30, the heat medium after heat exchange flows back to the solar heat collector 10 for reheating, and the circulation can realize that the heat medium in the circulation pipeline 20 circulates between the solar heat collector 10 and the household heat storage water tank 30 to heat or exchange heat.
Specifically, in this embodiment, the heating medium is heated by the solar thermal collector 10 and then is easily heated and expanded, the heating medium expanded in the solar thermal collector 10 and/or the circulation pipeline 20 can enter the liquid storage tank 40 through the expansion pipe 50 to be stored, so that the pressure relief effect of the solar thermal collector 10 and/or the circulation pipeline 20 is realized, the liquid storage tank 40 is communicated with the outside, and the conditions that the liquid storage tank 40 is exploded and the heating medium leaks due to the collection of the expanded heating medium are avoided. Here, the liquid storage tank 40 is connected to the outside, that is, the solar collector 10 is indirectly connected to the atmosphere, so that the solar collector 10 can operate under a normal pressure state. The heat medium stored in the liquid storage tank 40 does not exchange heat, and the liquid storage tank 40 is communicated with the outside, so that the heat medium in the liquid storage tank 40 is not gasified and volatilized.
In the embodiment of the application, the liquid storage tank 40 is arranged above the solar thermal collector 10, the liquid storage tank 40 is connected to the circulating pipeline 20 and the solar thermal collector 10 through the expansion pipe 50, when the heat medium in the solar thermal collector 10 and/or the circulating pipeline 20 is pressurized and expanded, the heat medium flows upwards through the expansion pipe 50 and enters the liquid storage tank 40, the pressure relief of the solar thermal collector 10 and/or the circulating pipeline 20 is realized, because the liquid storage tank 40 is used for bearing the effect of the volume change caused by the expansion and contraction of the heat medium, no pressure is applied to the circulating pipeline 20 and the solar thermal collector 10 when the heat medium is expanded, and the liquid storage tank 40 is communicated with the outside, so that the solar thermal collector 10 can work under the normal pressure state, the working pressure of the solar thermal collector 10 and the circulating pipeline 20 is reduced, and the problems of pipe explosion, heat medium leakage, heat collection, the damage probability of the solar heat collector 10 and the circulating pipeline 20 is reduced, and the safety performance of the whole hot water system is improved. In addition, the circulating pump 100 is used for driving the heat medium in the circulating pipeline 20 to forcibly heat and exchange heat between the solar thermal collector 10 and the household heat storage water tank 30, that is, the heat medium in the solar thermal collector 10 directly exchanges heat with the household heat storage water tank 30 through the circulating pipeline, the heat exchange efficiency is very high, the liquid storage tank 40 does not participate in the heat exchange work of the solar thermal collector 10, the temperature of the heat medium in the liquid storage tank 40 is low, even if the liquid storage tank 40 is communicated with the outside, the evaporation and volatilization condition of the heat medium can be reduced, and the heat loss of the system is reduced, thereby reducing the waste of the heat medium and heat, improving the utilization rate of the heat medium and heat, improving the heat exchange efficiency of the solar thermal collector 10, and reducing the manufacturing cost and the operation cost. More than, the solar water heating system that this embodiment provided, system safe and reliable, economy reasonable, the heat transfer is high-efficient, and application scope is very wide, and need not set up unnecessary equipment such as expansion tank, buffer tank alone on circulating line 20, greatly reduced hot water system's cost, also avoided solar collector 10 to heat the heat medium in the buffer tank earlier and cause the heat medium gasification serious phenomenon of volatilizing simultaneously, greatly reduced the operation cost.
In general, in the present embodiment, the solar thermal collector 10 is installed on the roof, the household hot water storage tanks 30 are installed in each floor of the house, and the liquid storage tank 40 is installed above the solar thermal collector 10.
Specifically, in the present embodiment, the expansion pipe 50 is provided with the gate valve 130, in a working state, the gate valve 130 is in an open state, and when the heat medium is replenished, the heat medium in the liquid storage tank 40 flows into the solar heat collector 10 and the circulation pipe 20 through the expansion pipe 50, so that the solar heat collector 10 can heat the heat medium, and the heat medium can also flow in the circulation pipe 20 in a circulating manner; when the heat medium in the solar collector 10 and/or the circulating water pump is pressurized and expanded, the heat medium can smoothly flow into the reservoir 40 through the expansion pipe 50. When the solar heat collector 10 or the circulation pipeline 20 needs to be overhauled, the gate valve 130 is closed, and the heat medium in the liquid storage tank 40 is prevented from leaking outwards during overhauling.
In one embodiment, the top of the liquid storage tank 40 is provided with an exhaust hole which is communicated with the inside and the outside of the liquid storage tank 40 so as to realize the normal pressure state work of the liquid storage tank 40 and the solar heat collector 10, and the arrangement of the exhaust hole reduces the inner diameter of a channel communicated with the outside of the liquid storage tank 40, thereby effectively reducing the vaporization and volatilization and heat dissipation of the heat medium in the liquid storage tank 40.
Specifically, referring to fig. 2, the liquid storage tank 40 is provided with a volatilization prevention pipe 60 respectively communicating the inside of the liquid storage tank 40 with the outside, the volatilization prevention pipe 60 is disposed at the top of the liquid storage tank 40, and one end of the volatilization prevention pipe 60 is connected to the exhaust hole and communicates with the inside of the liquid storage tank 40 through the exhaust hole, so that the liquid storage tank 40 communicates with the outside through the volatilization prevention pipe 60, and the solar thermal collector 10 communicates with the outside atmosphere. When the expanded heat medium of pressure boost passes through in expansion pipe 50 gets into liquid reserve tank 40 in solar collector 10 and/or circulating line 20, the heat medium after the gasification can't directly volatilize to the external world, and can only volatilize through volatilization prevention pipe 60, volatilization prevention pipe 60's setting has reduced the internal diameter of the passageway that the heat medium volatilizees away, the volatile route of heat medium has also been prolonged simultaneously, consequently, the heat medium volatilizees through volatilization prevention pipe 60 and goes the phenomenon that the in-process can appear condensation liquefaction, can flow back to liquid reserve tank 40 through volatilization prevention pipe 60 at last, then under the condition that guarantees liquid reserve tank 40 intercommunication atmospheric, the volatilization of heat medium and thermal scattering and disappearing have been reduced, the waste of heat medium is reduced, and the cost is reduced.
More specifically, referring to fig. 2, the opening 61 of the volatilization prevention pipe 60 is disposed at an end of the volatilization prevention pipe 60 away from the exhaust hole, and the opening 61 of the volatilization prevention pipe 60 is disposed downward, so that on the basis that the liquid storage tank 40 is communicated with the outside atmosphere, the heat medium in the liquid storage tank 40 is prevented from being diluted or damaged due to the fact that outside water or other substances enter the liquid storage tank 40 through the volatilization prevention pipe 60.
In one embodiment, referring to fig. 2, the anti-volatilization tube 60 extends spirally upward to form a coil, and the spiral arrangement greatly extends the length of the anti-volatilization tube 60, thus extending the path of the heat medium to be volatilized and increasing the complexity of the path of the heat medium to be volatilized. When the heat medium gasification in the liquid reserve tank 40 volatilizees through the pipe 60 that volatilizees, the trend that the spiral of the pipe 60 that volatilizees that upwards extends of gasification heat medium must be along preventing volatilizing upwards volatilizees, the design that the spiral of the pipe 60 that volatilizees upwards extends, make the heat medium route that volatilizees upwards very complicated, make the heat medium can cool off gradually and the condensation liquefaction in the process of volatilizing upwards, at last still flow back to the liquid reserve tank 40 along preventing volatilizing pipe 60, then prevent volatilizing pipe 60 and played the effect of preventing heat medium gasification and volatilizing, can also play the effect of collecting heat medium simultaneously, the volatilization of heat medium has been reduced, the operation cost is reduced.
In one embodiment, referring to fig. 1, a solar heat collector 10 has a first liquid outlet end 11 and a first liquid inlet end 12, two ends of a circulation pipe 20 are respectively connected to the first liquid inlet end 12 and the first liquid outlet end 11, and a household heat storage water tank 30 is connected to the circulation pipe 20 and is disposed between the first liquid outlet end 11 and the first liquid inlet end 12 of the solar heat collector 10. The heat medium heated in the solar heat collector 10 enters the circulation pipeline 20 through the first liquid outlet end 11, exchanges heat with cold water in the household heat storage water tank 30, and then flows back to the solar heat collector 10 through the first liquid inlet end 12, so that primary circulation is realized.
Specifically, one end of the expansion pipe 50 is connected to the liquid storage tank 40, one end of the expansion pipe 50 away from the liquid storage tank 40 is connected to the circulation pipeline 20 and communicated with the circulation pipeline 20, and one end of the expansion pipe 50 away from the liquid storage tank 40 is arranged near the first liquid outlet end 11, so that the expansion pipe 50 is communicated with the first liquid outlet end 11 of the solar collector 10. Therefore, the heat medium in the liquid storage tank 40 can enter the circulation pipeline 20 through the expansion pipe 50, and can also enter the solar thermal collector 10 through the first liquid outlet end 11, when the heat medium in the solar thermal collector 10 is pressurized and expanded, the heat medium flows out from the first liquid outlet end 11 and enters the liquid storage tank 40 through the expansion pipe 50, and similarly, the heat medium pressurized and expanded in the circulation pipeline 20 can directly enter the liquid storage tank 40 through the expansion pipe 50.
In one embodiment, referring to fig. 1, the solar water heating system further includes a first detection device 70, a second detection device 80, and an electric controller 90. The first detecting device 70 is disposed on the circulation pipe 20 and located near the first liquid outlet end 11 to detect the temperature of the first liquid outlet end 11, so as to obtain the temperature of the heat medium in the solar heat collector when the heat medium is output from the first liquid outlet end 11, that is, the temperature of the heated heat medium before heat exchange with the cold water in the household heat storage water tank 30 is the first temperature. The second detecting device 80 is disposed on the circulating pipe 20 and located near the first liquid inlet end 12 to detect the temperature of the near the first liquid inlet end 12, so as to obtain the temperature of the heat medium flowing back from the first liquid inlet end 12 to the solar thermal collector 10, that is, the temperature of the heat medium after heat exchange with the cold water in the household heat storage water tank 30, which is the second temperature. The electric controller 90 is electrically connected to the circulation pump 100, the first detection device 70, and the second detection device 80, respectively, and the electric controller 90 can obtain a temperature difference between a first temperature detected by the first detection device 70 and a second temperature detected by the second detection device 80 to determine whether the cold water in the household heat storage water tank 30 is heated, and control whether the circulation pump 100 continues to circulate the heat medium according to the temperature difference.
Specifically, in this embodiment, when the temperature difference between the first temperature and the second temperature is greater than or equal to the first preset value, it indicates that the cold water in the household heat storage water tank 30 after heat exchange with the heat medium does not reach the preset temperature, and the electric controller 90 controls the circulating pump 100 to continue circulating the heat medium according to the temperature difference, so that the heat medium heated in the solar thermal collector 10 continues to circulate between the household heat storage water tank 30 and the solar thermal collector 10 to exchange heat with the cold water in the household heat storage water tank 30; when the temperature difference between the first temperature and the second temperature is less than or equal to the second preset value, which indicates that the cold water in the household heat storage water tank 30 after heat exchange with the heat medium reaches the preset temperature, the electric controller 90 controls the circulation pump 100 to be turned off, so as to turn off the circulation heat exchange work of the heat medium. When the temperature difference between the first temperature and the second temperature is greater than or equal to the first preset value again, the circulation pump 100 is continuously started, and when the temperature difference between the first temperature and the second temperature is less than or equal to the second preset value again, the circulation pump 100 is closed again, so that the circulation is performed, the automation degree is very high, and the energy waste is reduced.
In one embodiment, referring to fig. 1, the circulation pipe 20 includes a water supply pipe 21, a cocurrent pipe 22, and a water return pipe 23. One end of the water supply pipe 21 is connected to the first liquid outlet end 11 of the solar heat collector 10, and one end of the expansion pipe 50 far away from the liquid storage tank 40 is connected to the water supply pipe 21 and communicated with the water supply pipe 21. The input end of the household heat storage water tank 30 is connected to the water supply pipe 21, and the water supply pipe 21 outputs the heat medium before heat exchange to the household heat storage water tank 30. The on-path pipe 22 is connected to an output end of the household heat storage water tank 30 to receive the heat-exchanged heat medium output from the household heat storage water tank 30. One end of the water return pipe 23 is connected to the co-range pipe 22 and communicated with the co-range pipe 22, and the other end of the water return pipe 23 is connected to the first liquid inlet end 12 of the solar thermal collector 10. When the solar heat collector 10 works, the heated heat medium in the solar heat collector 10 is output from the first liquid outlet end 11 and flows into the household heat storage water tank 30 through the water supply pipe 21 to exchange heat with cold water in the household heat storage water tank 30, and the heat medium after heat exchange is output to the same-path pipe 22 from the output end of the household heat storage water tank 30 and sequentially flows back to the solar heat collector 10 through the water return pipe 23 and the first liquid inlet end 12.
The solar water heating system in this embodiment is in a working mode of centralized heat collection and individual heat storage, the number of the individual heat storage water tanks 30 is at least two, the input end of each individual heat storage water tank 30 is connected to the water supply pipe 21, the water supply pipe 21 outputs a heat medium to each individual heat storage water tank 30, the output end of each individual heat storage water tank 30 is connected to the same-pass pipe 22, and the same-pass pipe 22 is used for receiving the heat-exchanged heat medium output from each individual heat storage water tank 30 and returning the heat medium to the solar heat collector 10 through the water return pipe 23.
In one embodiment, referring to fig. 1, the household heat storage water tank 30 includes a first tank 31 and a heat exchange pipe 32 disposed in the first tank 31, and the first tank 31 is used for storing water. The heat exchange tube 32 has a second liquid inlet end 321 and a second liquid outlet end 322, the second liquid inlet end 321 is connected to the water supply tube 21 so that the heat exchange tube 32 is communicated with the water supply tube 21, and the second liquid outlet end 322 is connected to the co-channel tube 22 so that the heat exchange tube 32 is communicated with the co-channel tube 22. The heat medium in the water supply pipe 21 enters the heat exchange pipe 32 through the second liquid inlet end 321 of the heat exchange pipe 32, the cold water in the first tank 31 exchanges heat with the heat medium in the heat exchange pipe 32, the heat medium after heat exchange is output to the same-path pipe 22 through the second liquid outlet end 322 of the heat exchange pipe 32 and flows back to the solar heat collector 10 through the water return pipe 23, and the whole heat exchange process is very simple.
Specifically, the heat exchange tube 32 is a spiral coil, which can increase the contact area between the heat exchange tube and the cold water in the first tank 31, and improve the heat exchange efficiency between the heat medium in the heat exchange tube 32 and the cold water.
In one embodiment, referring to fig. 1, a first exhaust valve 110 is disposed on the water supply pipe 21, the first exhaust valve 110 is disposed near the first liquid outlet end 11 of the solar thermal collector 10 and near the expansion pipe 50, and the first exhaust valve 110 is used for exhausting the water supply pipe 21 to deflate and protect the water supply pipe 21.
The on-stroke pipe 22 is provided with a second exhaust valve 120 for exhausting and decompressing the on-stroke pipe 22, so as to protect the on-stroke pipe 22.
In one embodiment, please refer to fig. 1, two circulation pumps 100 are provided, the two circulation pumps 100 are connected in parallel to the circulation pipeline 20, and the two circulation pumps 100 are connected in parallel to the water return pipe 23 and located near the first liquid inlet end 12 of the solar thermal collector 10, and are configured to drive the heat medium output from the first liquid outlet end 11 of the solar thermal collector 10 to flow back into the solar thermal collector 10, so as to realize circulation of the heat medium between the solar thermal collector 10 and the household heat storage water tanks 30, and facilitate heat exchange between the household heat storage water tanks 30 and the heat medium.
Wherein, the two circulation pumps 100 are connected to the return pipe 23 to play a standby role.
In one embodiment, referring to fig. 2, the liquid storage tank 40 includes a second tank 41 and a tank cover 42, the second tank 41 is used for storing a heat medium, the exhaust hole is formed in the top of the second tank 41, the volatilization prevention pipe 60 is formed in the top of the second tank 41, a liquid supplement port 411 for injecting the heat medium is formed in the top of the second tank 41, so as to facilitate supplement of the heat medium into the second tank 41, and the tank cover 42 is covered on the liquid supplement port 411, so as to protect the heat medium in the second tank 41 and prevent external water or other substances from entering the second tank 41 to dilute or damage the heat medium.
In one embodiment, the operating principle of the solar water heating system is as follows: the liquid storage tank 40 is filled with a heat medium in the circulating pipeline 20 and the solar heat collector 10, when the sun exists in the daytime, the solar heat collector 10 heats the heat medium to raise the temperature of the heat medium, the electric controller 90 controls the circulating pump 100 according to the temperature difference between the first temperature acquired by the first detection device 70 and the second temperature acquired by the second detection device 80, when the temperature difference between the first temperature and the second temperature is greater than or equal to a first preset value, the electric controller 90 controls the circulating pump 100 to start, the high-temperature heat medium in the solar heat collector 10 is conveyed into the heat exchange pipes 32 of the household heat storage water tank 30 through the water supply pipes 21 to exchange heat, and the heat medium after heat exchange in the heat exchange pipes 32 sequentially flows back to the solar heat collector 10 through the same-path pipes 22 and the water return pipes 23; and when the temperature difference between the first temperature and the second temperature is smaller than or equal to a second preset value, the electric controller 90 controls the circulation pump 100 to be closed, and the circulation work of the heat medium is stopped. When the temperature difference between the first temperature and the second temperature is greater than or equal to the first preset value again, the circulation pump 100 is turned on again, and when the temperature difference between the first temperature and the second temperature is less than or equal to the second preset value again, the circulation pump 100 is turned off again, so that the operation is performed in a reciprocating cycle. Wherein, the heating medium is heated by the solar heat collector 10 and then is heated and expanded in the daytime, and the expanded heating medium flows into the liquid storage tank 40 through the expansion pipe 50 to be stored; at night or in rainy days, the temperature of the heat medium in the liquid storage tank 40 is reduced, the volume is reduced, and the heat medium flows back into the solar collector 10 and the circulation pipeline 20 through the expansion pipe 50.
The above description is only directed to the working principle of the solar water heating system, and is not taken as the only limitation to the working process of the solar water heating system.
The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims (10)

1. A solar water heating system, comprising:
a solar heat collector;
the circulating pipeline is connected with the solar heat collector and is provided with a circulating pump for circulating the heat medium in the solar heat collector;
the household heat storage water tank is arranged on a circulation path of the circulation pipeline and exchanges heat with a heat medium circulating in the circulation pipeline;
the liquid storage tank is arranged above the solar heat collector and communicated with the outside, and is used for storing a heat medium;
one end of the expansion pipe is connected with the liquid storage tank, the other end of the expansion pipe is communicated with the circulating pipeline and the solar thermal collector respectively, the expansion pipe is used for supplying the circulating pipeline and/or the heat medium in the solar thermal collector enters the liquid storage tank during expansion, and the heat medium in the liquid storage tank can enter the circulating pipeline and the solar thermal collector through the expansion pipe.
2. The solar water heating system of claim 1, wherein the liquid storage tank is provided with a volatilization prevention pipe which is respectively communicated with the inside and the outside of the liquid storage tank, and an opening of the volatilization prevention pipe, which is far away from one end of the liquid storage tank, is arranged downwards.
3. A solar water heating system as claimed in claim 2, wherein the anti-evaporation pipe extends spirally upwards.
4. The solar water heating system of claim 1, wherein the solar collector has a first liquid outlet end and a first liquid inlet end, the circulation pipe is connected to the first liquid inlet end and the first liquid outlet end, respectively, and an end of the expansion pipe away from the liquid storage tank is connected to the circulation pipe and disposed at the first liquid outlet end.
5. The solar water heating system of claim 4, further comprising:
the first detection device is arranged on the circulating pipeline and positioned at the first liquid outlet end so as to obtain the temperature of the first liquid outlet end;
the second detection device is arranged on the circulating pipeline and is positioned at the first liquid inlet end so as to obtain the temperature of the first liquid inlet end;
and the electric controller is respectively and electrically connected with the circulating pump, the first detection device and the second detection device and can control the circulating pump according to the temperature difference between the temperature obtained by the first detection device and the temperature obtained by the second detection device.
6. A solar water heating system as claimed in claim 1, wherein the circulation pipe comprises:
the water supply pipe is connected with the solar heat collector and the expansion pipe and is connected with the household heat storage water tank so as to output a heat medium to the household heat storage water tank;
the same-pass pipe is connected with the household heat storage water tank to receive the heat medium output from the household heat storage water tank;
and the two ends of the water return pipe are respectively connected to one end of the same-path pipe and the solar heat collector.
7. The solar water heating system of claim 6, wherein the household heat storage water tank comprises a first tank body and a heat exchange pipe arranged in the first tank body, the heat exchange pipe is provided with a second liquid inlet end and a second liquid outlet end, the second liquid inlet end is connected to the water supply pipe, and the second liquid outlet end is connected to the co-route pipe.
8. The solar water heating system of claim 6, wherein the water supply pipe is provided with a first exhaust valve, and the in-line pipe is provided with a second exhaust valve.
9. A solar water heating system as claimed in any one of claims 1 to 8, wherein there are two circulation pumps, and two circulation pumps are connected in parallel to the circulation pipe.
10. The solar water heating system according to any one of claims 1 to 8, wherein the liquid storage tank comprises a second tank body, a liquid supplementing port for injecting a heating medium is formed in the second tank body, and a tank cover is arranged on the liquid supplementing port in a covering manner.
CN202010558494.0A 2020-06-18 2020-06-18 Solar water heating system Pending CN111664598A (en)

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