Household heating system of vacuum tube type solar collection and storage all-in-one machine heating module

Abstract

The utility model discloses a household heating system of a vacuum tube type solar collection and storage all-in-one machine heating module. The household heating system comprises a vacuum tube type solar thermosyphon microcirculation collection and storage all-in-one heating module, a circulating pipeline, a circulating heat exchange pipe-in-pipe, a pipe-in-pipe connecting pipe fitting, a control part, a heating circulating pump, a heating radiator, an electromagnetic valve and a water level probe. According to the system, the vacuum tube type solar energy collection and storage integrated module is adopted as a heat collection part, the thermosyphon water molecule microcirculation principle is adopted, heat collection is completed without depending on temperature difference circulation of a circulating pump in the heat collection process, the open type operation pressure of the system is small, balance, safety and reliability are achieved, and the integrated module is provided with the heat storage water tank for collecting heat energy. The system also adopts pipe-in-pipe heat exchange, so that the supply of domestic hot water is ensured while heating is realized.

Description

Technical Field

[0001] This utility model belongs to the field of solar heating technology, specifically relating to a household heating system with a vacuum tube type solar energy storage integrated heating module. Background Technology

[0002] Currently, the standard solar heating systems on the market typically use manifold-type vacuum tube solar collector modules for residential heating systems, such as... Figure 1 As shown, the system mainly consists of manifold vacuum tube solar collector modules, circulation pipes, an intelligent controller, a solar collector circulation pump, a heating circulation pump, a heating and hot water storage tank, and radiators. This is a direct heat exchange open system. The solar collector operates in an open manner, using direct water circulation as the working fluid. A circulation pump uses temperature difference to exchange heat between the indoor water tank and the manifold vacuum tube solar collector modules, and then a heating circulation pump circulates heat between the indoor water tank and the radiators. The system uses automatic temperature difference circulation for the solar collectors. When T1-T2 ≥ 8℃ (adjustable), the temperature difference circulation pump P1 starts. When T1-T2 ≤ 3℃ (adjustable), the temperature difference circulation pump P1 stops. In manual mode, the pump P1 can be forcibly activated via the controller. During heating operation, when the indoor thermostat temperature is ≤ 15℃ (adjustable lower heating limit), the heating circulation pump P4 starts. When the indoor thermostat temperature is ≥ 18℃ (adjustable upper heating limit), the heating circulation pump P4 stops. The system's heating and hot water storage tank replenishment is automatically controlled by a float switch and is independently controlled. The system uses outdoor main pipeline frost protection; when T1 ≤ 1℃ (adjustable), the electric frost protection cable BR activates for heating and frost protection.

[0003] The manifold-type vacuum tube solar collector module is the heat collection component of the entire solar collector system. It requires a circulating pump, a hot water storage tank, circulating pipes, a controller, and other components to complete the entire heat collection process. The manifold-type vacuum tube solar collector module mainly consists of solar glass vacuum tubes, a manifold, a vacuum tube support, and a bracket. The solar glass vacuum tube is horizontally inserted into the manifold, with the sealed bottom end of the vacuum tube placed in the hole of the vacuum tube support, forming a whole and fixed to an adjustable bracket with screws. The bracket is connected to a prefabricated foundation on the roof or ground. The water tank, vacuum tube, and support are then fixed to the bracket, which is installed parallel to the mounting plane. When cold water in the manifold passes through the manifold outlet—the solar glass vacuum tube—due to gravity, it is irradiated by the sun. The solar glass vacuum tube converts solar radiation energy into heat energy, which is transferred to the water molecules inside the tube. The water molecules, becoming less dense after being heated, rise to the water tank. The cooler water molecules in the tank, due to their higher density, sink to the bottom of the glass tube due to gravity, creating a thermosiphon effect. This process repeats, raising the water temperature in the tank. Utility Model Content

[0004] Purpose of the utility model: In order to overcome the shortcomings of the existing technology, this utility model provides a household heating system with a vacuum tube type solar energy storage integrated heating module.

[0005] Technical solution: A household heating system with a vacuum tube type solar thermal siphon micro-circulation integrated heating module, including a vacuum tube type solar thermal siphon micro-circulation integrated heating module, circulation pipes, circulation heat exchange tube-in-tube, tube-in-tube connecting fittings, control unit, heating circulation pump, heating radiators, solenoid valves and water level probes;

[0006] The system is a direct heat exchange open system, with the solar collector operating in an open manner and a direct water circulation working fluid used within the collector system. The vacuum tube type solar energy storage unit is directly connected to the heating radiator network via a heating circulation pump for indoor heating. The hot water storage tank of the vacuum tube type solar energy storage unit has a built-in circulating heat exchange tube for heat exchange, using the pressure of the tap water end to exchange for clean hot water for domestic hot water supply.

[0007] The vacuum tube type solar thermal siphon micro-circulation integrated heating module consists of several vacuum tube type solar energy storage units connected in series. Each vacuum tube type solar energy storage unit includes a glass vacuum collector tube, a heat storage and insulation water tank, a vacuum tube tail support, and an adjustable bracket. The glass vacuum collector tube, heat storage and insulation water tank, and vacuum tube tail support are assembled as a whole and fixed on the adjustable bracket. The adjustable bracket forms an angle with the installation plane that is close to the local latitude. The angle of the adjustable bracket can be adjusted by screws for different regions and latitudes.

[0008] The aforementioned heat storage and insulation water tank has a built-in closed loop-shaped tube-in-tube heat exchanger. The opening of the tube-in-tube heat exchanger is located outside the heat storage and insulation water tank. The heat exchanger can be connected to the tap water through the tube-in-tube connecting fittings, providing clean heat energy for domestic hot water while ensuring heating demand.

[0009] The vacuum tube type solar energy collection and storage unit adopts the thermosiphon principle, with micro-circulation inside water molecules, which can complete the process of water temperature rise without other kinetic energy. After the water temperature rises, it is automatically stored in the collection and storage insulated water tank.

[0010] The hot water in the vacuum tube solar energy storage unit is connected to the inlet and outlet of the heating radiator through a circulation pipe and a heating circulation pump. It automatically starts and stops according to the temperature difference between indoors and outdoors to achieve the purpose of raising the indoor temperature. After the radiator dissipates heat and the water temperature drops, the kinetic energy of the heating circulation pump returns to the storage and heat preservation water tank to continue micro-circulation heat collection.

[0011] As an optimization, the automatic control process of the system is as follows: when T1≤18℃ (the upper and lower limits of heating temperature are adjustable), the heating circulation pump P1 starts; when T1≥22℃ (the upper limit of heating temperature is adjustable), the heating circulation pump P1 stops; in manual mode, the pump P1 can be forcibly controlled to operate by operating the controller.

[0012] As an optimization: the system uses an external heating cable and low-temperature circulating antifreeze. When T3≤2℃, the heating cable automatically starts to protect the outdoor pipeline from freezing.

[0013] As an optimization: the aforementioned insulated water tank is equipped with heat exchange metal pipes. The circulation pipe has a pipe-in-pipe heat exchange structure. The inlet and outlet of the heat exchange pipe are connected to the tap water and domestic hot water inlets. When the domestic hot water outlet is opened, the tap water enters the pipe-in-pipe and exchanges heat with the hot water in the storage tank through the metal pipe wall. The outlet temperature continues to rise until it reaches the required temperature for use, making it ready to use immediately. The pipe-in-pipe structure not only has a good heat exchange effect but also separates the domestic hot water from the heating hot water, ensuring the cleanliness of the domestic hot water. Furthermore, the pipe-in-pipe structure can effectively utilize the temperature of the circulating return water in the outer pipe to prevent the pipe from freezing.

[0014] As an optimization: the glass vacuum collector tube is inserted into the heat storage water tank at a certain angle. The heat storage water tank is provided with a hole with an inclined angle. The inclined angle ensures that the closed end of the bottom of the glass vacuum collector tube is lower than the open end. The closed end of the bottom of the glass vacuum collector tube is placed in the vacuum tube tail support hole, forming a whole and fixed to an adjustable bracket with screws. The adjustable bracket is connected to the prefabricated foundation of the roof or ground.

[0015] As an optimization: the water outlet inside the heat storage tank is located at 2 / 3 of the tank's height, and is connected to the radiator or underfloor heating inlet. This helps the high-temperature water inside the tank enter the radiator, ensuring heating performance. The water inlet is specifically located at the bottom of the tank, and is connected to the radiator or underfloor heating outlet. This helps the low-temperature return water from the radiator enter the bottom of the tank and the bottom of the vacuum tube, enabling faster heat collection and circulation.

[0016] Beneficial effects: The system of this utility model adopts a vacuum tube type solar energy storage module as the heat collection part, and adopts the principle of thermosiphon water molecule microcirculation. The heat collection process no longer needs to rely on the temperature difference circulation of the circulation pump to complete the heat collection. The system operates in open mode with low pressure, balanced and safe and reliable. In addition, the integrated module has a built-in hot water storage tank to collect heat energy. The system also adopts a pipe-in-pipe heat exchange to solve the problem of heating while ensuring the supply of domestic hot water. Attached Figure Description

[0017] Figure 1 This is a structural diagram of a conventional manifold vacuum tube solar collector module residential heating system;

[0018] Figure 2 This is a structural schematic diagram of the household heating system of the vacuum tube type solar energy storage integrated heating module of this utility model;

[0019] Figure 3 This is a schematic diagram of the main structure of the vacuum tube type solar energy collection and storage integrated machine of this utility model;

[0020] Figure 4 This is a top view schematic diagram of the vacuum tube type solar energy collection and storage integrated machine of this utility model;

[0021] Figure 5 This is a schematic diagram of the west side structure of the vacuum tube type solar energy collection and storage integrated machine of this utility model;

[0022] Figure 6 This is a schematic diagram of the south-facing structure of the vacuum tube type solar energy collection and storage integrated machine of this utility model;

[0023] Figure 7 This is a schematic diagram of the main structure of the insulated water tank of this utility model. Detailed Implementation

[0024] Example

[0025] like Figure 2 As shown, a household heating system using a vacuum tube type solar thermal siphon micro-circulation integrated heating module includes a vacuum tube type solar thermal siphon micro-circulation integrated heating module, circulation pipes, circulation heat exchange tube-in-tube, tube-in-tube connecting fittings, control unit, heating circulation pump, heating radiators, solenoid valves, and water level probes.

[0026] The aforementioned vacuum tube solar thermosiphon micro-circulation integrated heating module consists of several vacuum tube solar energy storage units connected in series, such as... Figure 3-6 As shown, the vacuum tube type solar energy collection and storage integrated machine includes a glass vacuum collector tube 1, a heat storage and insulation water tank 2, a vacuum tube tail support 3, and an adjustable bracket 4. The glass vacuum collector tube 1, the heat storage and insulation water tank 2, and the vacuum tube tail support 3 are assembled as a whole and fixed on the adjustable bracket 4. The adjustable bracket 4 forms an angle with the installation plane that is close to the local latitude, which is more conducive to receiving solar radiation energy. The angle of the adjustable bracket can be adjusted by screws for different regions and latitudes.

[0027] like Figure 7 As shown, the insulated water tank 2 has a built-in closed-loop tube-in-tube heat exchanger 7, with the opening located outside the tank for easy connection. The tube-in-tube heat exchanger can be connected to the tap water supply using the tube-in-tube connecting fitting 6, thus providing clean heat energy for domestic hot water while ensuring heating needs are met. Furthermore, it separates heating hot water from domestic hot water, ensuring safer and healthier water quality.

[0028] To ensure a certain height difference between the glass vacuum collector tube 1 and the heat storage and insulation water tank 2, the tilt angle of the glass vacuum collector tube 1 towards the bottom of the heat storage and insulation water tank 2 is crucial. The glass vacuum collector tube 1 is inserted into the heat storage and insulation water tank 2 at a certain angle. The heat storage and insulation water tank 2 is provided with a hole with an inclined angle. The tilt angle is important to ensure that the closed end of the vacuum tube is lower than the open end. The closed end of the vacuum tube is placed in the vacuum tube tail support hole 3, forming a whole and fixed to the adjustable bracket 4 with screws. The adjustable bracket 4 is connected to the prefabricated foundation 5 of the roof or ground.

[0029] The outlet 21 inside the insulated water tank 2 is located at 2 / 3 of the tank's height. This outlet 21 ultimately connects to the radiator or underfloor heating inlet, facilitating the entry of high-temperature water from the tank into the radiator and ensuring heating efficiency. The inlet 22 is specifically located at the very bottom of the tank. This inlet 22 ultimately connects to the radiator or underfloor heating outlet, further facilitating the entry of low-temperature return water from the radiator into the bottom of the tank and the vacuum tubes, enabling faster heat collection and circulation.

[0030] When cold water in the storage and insulation water tank passes through the tilted outlet of the water tank—the vacuum glass heat collector tube—due to gravity, it is irradiated by the sun. The glass vacuum tube converts the solar radiation energy into heat energy and transfers it to the water molecules inside the tube. The water molecules become less dense after being heated and float to the water tank. The water molecules in the tank, which are colder, sink to the bottom of the glass tube due to their greater density and gravity, forming a thermosiphon phenomenon. This process is repeated to raise the water temperature in the tank. The whole process is called thermosiphon microcirculation.

[0031] Compared with conventional manifold type vacuum tube solar thermal siphon micro-circulation integrated heating and storage module, the advantages of this utility model are as follows:

[0032] 1. This product uses a large-diameter water tank to store heat. Because the diameter is large enough, the insulation layer can be made thicker, more than twice as thick as the insulation layer of the manifold type. This can better reduce heat loss and improve thermal efficiency.

[0033] 2. The vacuum tube of this product is inserted at an angle to ensure a sufficient height difference between hot and cold water, which is more conducive to thermosiphon microcirculation. The manifold type product is inserted horizontally without a height difference.

[0034] 3. This product is equipped with an adjustable angle bracket, allowing for flexible installation in various regions and occasions.

[0035] 4. This product features a built-in tube-in-tube heat exchanger in the water tank, which is more conducive to the heating system's ability to also provide domestic hot water. The water tank (where hot water is always at the top and cold water at the bottom) also has a height device to ensure a stable supply of hot water, making it more suitable for the temperature difference requirements of the heating system's supply and return water. These features are not found in conventional manifold vacuum tube modules.

[0036] This invention relates to a direct heat exchange open system, where the solar collector operates in an open manner and uses direct water circulation as the working fluid. The vacuum tube solar energy storage unit is directly connected to the heating radiator network via a heating circulation pump for indoor heating. The hot water storage tank of the vacuum tube solar energy storage unit incorporates a circulating heat exchange tube-to-tube heat exchange system, utilizing the pressure of the tap water supply to produce clean hot water for domestic hot water supply.

[0037] The heat collection process of this utility model system is as follows: The vacuum tube type solar energy storage unit adopts the thermosiphon principle, and the water molecules circulate internally. The water temperature can be raised without other kinetic energy. After the water temperature rises, it is automatically stored in its own water tank.

[0038] The heating process of this utility model system is as follows: the hot water in the integrated unit is connected to the inlet and outlet of the indoor radiator (heating radiator or floor heating) through the circulation pipe and the circulation water pump. It automatically starts and stops according to the temperature difference between indoor and outdoor, so as to achieve the purpose of raising the indoor temperature. After the radiator dissipates heat and the water temperature drops, the kinetic energy of the water pump returns to the hot water storage tank of the integrated unit to continue micro-circulation heat collection.

[0039] The automatic control process of this system is as follows: When T1 ≤ 18℃ (the upper and lower limits of the heating temperature are adjustable), the heating circulation pump P1 starts. When T1 ≥ 22℃ (the upper limit of the heating temperature is adjustable), the heating circulation pump P1 stops; in manual mode, the pump P1 can be forcibly controlled to operate through the controller.

[0040] This utility model's heating system also provides 24-hour domestic hot water supply. The process involves: a heat exchange metal pipe installed inside the integrated hot water storage tank; a pipe-in-pipe heat exchange structure within the circulation pipe; and the inlet and outlet of the heat exchange pipe connected to the tap water and domestic hot water inlets. When the domestic hot water outlet is opened, tap water enters the pipe-in-pipe and exchanges heat with the hot water in the storage tank through the metal pipe wall. The outlet temperature continuously rises until it reaches the required temperature for immediate use. The pipe-in-pipe design provides excellent heat exchange while separating domestic hot water from heating hot water, ensuring the cleanliness of the domestic hot water. Furthermore, the pipe-in-pipe design effectively utilizes the temperature of the circulating return water in the outer pipe, preventing the pipe from freezing.

[0041] This invention provides a system for preventing pipe freezing: the system uses an external heating cable and low-temperature circulating freezing protection. When T3 ≤ 2℃, the heating cable automatically activates to protect the outdoor pipes from freezing.

[0042] Compared with conventional manifold vacuum tube solar thermal collector module heating systems, the advantages of this invention are as follows:

[0043] This system uses a vacuum tube solar energy storage module as the heat collection component and employs the thermosiphon water molecule microcirculation principle. The heat collection process no longer relies on a circulating pump for temperature difference circulation. The system operates in open mode with low pressure, balanced operation, and high reliability. Furthermore, this integrated module has its own built-in hot water storage tank for collecting heat energy. The advantages of this approach are as follows:

[0044] 1. Reducing the number of circulating pumps saves the electrical energy required for the circulating pumps, simplifies the heat circulation piping, reduces system heat loss, and improves thermal efficiency.

[0045] 2. It comes with a built-in hot water storage tank, which reduces the need for a large indoor water tank, thus indirectly increasing the indoor building area and avoiding the impact of a high-temperature water tank on the room temperature in summer.

[0046] 3. The heat collection process of the manifold vacuum tube system uses a water pump for circulating heat exchange. Because the circulating pump is prone to bursting due to excessive pressure kinetic energy when it is frequently started, this integrated module does not use the kinetic energy of the circulating pump, thus effectively avoiding this problem.

[0047] This system uses a pipe-in-pipe heat exchanger to ensure the supply of domestic hot water while providing heating. The advantages of this approach are:

[0048] 1. A heating system that also provides domestic hot water can greatly improve the overall system's heat energy utilization, especially during the non-heating season. This not only solves the problem of energy saving for domestic hot water but also reduces the problem of excessively high temperatures in solar thermal systems during the summer.

[0049] 2. The heating system uses circulating water, which is repeatedly recycled within the system. If the water is not clean and comes into direct contact with the skin as hot water, it can easily cause health problems. Using a pipe-in-pipe secondary heat exchanger extracts heat from the solar energy system instead of directly heating the water, thus ensuring healthier water quality.

[0050] 3. Pipe-in-pipe heat exchange utilizes the pressure of the municipal water supply network to deliver hot water on demand. For domestic water use, no other power source is required, making it a non-powered pressurized water supply system. This greatly simplifies use and reduces energy consumption.

[0051] 4. The circulation pipe adopts a pipe-in-pipe heat exchange structure, which helps to utilize the heat in the large and small pipes to insulate and prevent freezing, and reduces the original two pipes into one. This reduces the materials and labor required for external pipe insulation, saving system costs. It also reduces heat loss caused by two pipes and improves thermal efficiency.

[0052] The foregoing description clearly and completely illustrates the technical solutions in the embodiments of this utility model, enabling those skilled in the art to better understand the advantages and features of this utility model, thereby providing a clearer definition of the scope of protection of this utility model. The embodiments described in this utility model are merely some embodiments of this utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

Claims

1. A household heating system using a vacuum tube type solar energy storage integrated heating module, characterized in that: The system is a once direct heat exchange open system, the solar heat collection part is open operation, and the direct water circulation working medium is used in the heat collection system; the vacuum tube type solar collection and storage integrated machine is directly connected with the pipe network of the heating radiator through the heating circulating pump to provide indoor heating; the built-in circulating heat exchange pipe-in-pipe heat exchanger of the vacuum tube type solar collection and storage integrated machine exchanges heat by using the tap water end pressure to exchange clean hot water for life hot water supply; The vacuum tube type solar heat siphon microcirculation collection and storage integrated heating module is composed of a plurality of vacuum tube type solar collection and storage integrated machines which are connected in series, the vacuum tube type solar collection and storage integrated machine comprises a glass vacuum heat collection pipe, a collection and storage heat preservation water tank, a vacuum pipe tail support and an adjustable support, the glass vacuum heat collection pipe, the collection and storage heat preservation water tank and the vacuum pipe tail support are fixed on the adjustable support after being integrated, the adjustable support and the installation plane form an included angle close to the local dimension angle, and the adjustable support in different regions and different dimensions can be adjusted in angle through screws; The collection and storage heat preservation water tank is internally provided with a closed return type pipe-in-pipe heat exchanger, the opening part of the pipe-in-pipe heat exchanger is arranged outside the collection and storage heat preservation water tank, the heat exchanger can be connected with tap water through the pipe-in-pipe connecting pipe, and clean heat energy is provided for life hot water supply when the heating demand is ensured; The vacuum tube type solar collection and storage integrated machine adopts the heat siphon principle, the water molecules are internally microcirculated, and the process of water temperature rising can be completed without other kinetic energy, and the water temperature is automatically stored in the collection and storage heat preservation water tank after rising; The hot water in the vacuum tube type solar collection and storage integrated machine is connected with the inlet and outlet of the heating radiator through the circulating pipe and the heating circulating pump, is automatically started and stopped according to the indoor and outdoor temperature difference, and the purpose of indoor temperature rising is achieved, and the water temperature is reduced after the radiator radiates heat, and then the water is returned to the collection and storage heat preservation water tank through the kinetic energy of the heating circulating pump to continue microcirculation heat collection. The automatic control process of the system is as follows: when T1 is less than or equal to 18 DEG C, the heating circulating pump P1 is started; when T1 is greater than or equal to 22 DEG C, the heating circulating pump P1 is stopped; in the manual mode, the pump P1 can be forcibly controlled to act by operating the controller.

2. The vacuum tube type solar energy collection and storage integrated heating module household heating system according to claim 1, characterized in that: The system adopts an external heating tape and low-temperature circulation anti-freezing, and when T3 is less than or equal to 2 DEG C, the heating tape is automatically started to protect the outdoor pipe from freezing.

3. The vacuum tube type solar energy collection and storage integrated heating module household heating system according to claim 1, characterized in that: The collection and storage heat preservation water tank is provided with a heat exchange metal pipe, the circulating pipe is provided with a pipe-in-pipe heat exchange structure, the inlet and outlet of the heat exchange pipe are connected with tap water and life hot water, when the life hot water use port is opened, tap water enters the inner pipe of the pipe-in-pipe, exchanges heat with the hot water in the heat preservation water tank through the metal pipe wall, and the outlet end temperature continuously rises to reach the required temperature, so that the pipe-in-pipe can be used immediately after being opened, the pipe-in-pipe can have good heat exchange effect, and can separate the life hot water from the heating hot water to ensure the cleanliness of the life hot water, and the pipe-in-pipe can well utilize the circulating return water temperature in the outer pipe to prevent the pipe from being frozen.

4. The vacuum tube type solar energy collection and storage integrated heating module household heating system according to claim 1, characterized in that: ​ 5. The vacuum tube type solar energy collection and storage integrated heating module household heating system according to claim 1, characterized in that: The glass vacuum heat collecting tube is inserted into the heat collecting and storing water tank at a certain angle, the heat collecting and storing water tank is provided with a hole with an inclined angle, the inclined angle ensures that the bottom closed end of the glass vacuum heat collecting tube is lower than the open end, the bottom closed end of the glass vacuum heat collecting tube is arranged in the tail bracket hole of the vacuum tube, and the vacuum tube is fixed on the adjustable support as a whole by screws.

6. The vacuum tube type solar energy harvesting and heating integrated module household heating system according to claim 1, characterized in that: The water outlet of the heat collecting and storing water tank is arranged at the position of 2 / 3 of the height of the water tank, the water outlet is connected with the inlet of the heating radiator or the floor heating, the high-temperature water in the water tank can enter the heating radiator, the inlet of the water tank is arranged at the bottom of the water tank, the inlet is connected with the outlet of the heating radiator or the floor heating, the low-temperature return water of the heating radiator can enter the bottom of the water tank and the bottom of the vacuum tube, and the heat collecting and circulating can be faster.

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