CN210951918U - Hot water return system for improving solar energy utilization rate - Google Patents
Hot water return system for improving solar energy utilization rate Download PDFInfo
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- CN210951918U CN210951918U CN201921053812.7U CN201921053812U CN210951918U CN 210951918 U CN210951918 U CN 210951918U CN 201921053812 U CN201921053812 U CN 201921053812U CN 210951918 U CN210951918 U CN 210951918U
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
- Y02E10/44—Heat exchange systems
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Abstract
The utility model discloses a hot water return system for improving the utilization rate of solar energy, which comprises a solar heat collection circulating pipeline, a heat collection and constant temperature water tank, an auxiliary heating circulating system and a hot water supply and return circulating pipeline; the utility model discloses an intelligence control by temperature change three-way valve through the judgement to hot water return temperature, switches the hot water return to heat supply or thermal-arrest water pitcher, is applicable to all solar water heating system who adopts two water pitchers at present. When the temperature of the hot water return water is lower than that of the heat collecting water tank, the hot water return water flows into the heat collecting water tank through automatic switching of the three-way valve, and solar energy is fully utilized to heat the hot water return water.
Description
Technical Field
The utility model relates to a solar energy, auxiliary heating equipment and heat transfer technical field specifically are an improve solar energy utilization ratio's hot water return system.
Background
The use of solar energy coupled with auxiliary heating devices is now widely accepted in hot water systems. The discontinuity of solar hot water needs the supplementary of auxiliary heat source, and auxiliary heating equipment can guarantee constant temperature hot water as supplementary energy, has better compensatied the instability of solar energy. However, the hot water return positions of all the existing hot water systems are single, the solar energy in fine weather cannot be utilized when the hot water returns to the constant-temperature water tank, and the energy of the auxiliary heating equipment can be wasted when the hot water returns to the heat collection water tank in rainy days. The system well solves the problem of hot water circulation, fully and effectively utilizes solar energy, saves energy of auxiliary heating equipment, and is simple in structure, convenient and fast.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an improve solar energy utilization's hot water return system to solve the problem that proposes in the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme: a hot water return system for improving the utilization rate of solar energy comprises a solar heat collection circulating pipeline, an auxiliary heating circulating system, a hot water supply and return circulating pipeline and a controller;
the solar heat collection circulating pipeline comprises a solar heat collector 1, a heat collection circulating pump 4, a first heat exchange pipe 10, an air-cooled radiator 7 and an electric three-way valve 8, wherein the solar heat collector 1, the heat collection circulating pump 4 and the first heat exchange pipe 10 are sequentially connected in series through a pipeline to form the circulating pipeline, the air-cooled radiator 7 is connected in parallel on the pipeline between the solar heat collector 1 and the first heat exchange pipe 10, the inlet of the air-cooled radiator 7 is connected with the pipeline between the solar heat collector 1 and the first heat exchange pipe 10 through the electric three-way valve 8, the inlet of the solar heat collector 1 is connected with a second temperature sensor T3583, and the outlet of the solar heat collector 1 is connected with;
the hot water supply and return circulation pipeline comprises a heat collection water tank 2, a heat collection water tank temperature sensor T2, a constant temperature water tank 3, a constant temperature water tank temperature sensor T3, a hot water return temperature sensor T4, a hot water return circulation pump 5 and a temperature control three-way valve 9, wherein the bottom inlet of the heat collection water tank 2 is connected with a municipal water supply pipeline and a hot water return pipe, and the top outlet of the heat collecting water tank 2 is connected with the bottom inlet of the constant temperature water tank 3 through a pipeline, a hot water return circulating pump 5 and a hot water return temperature sensor T4 are arranged on the hot water return pipe, the hot water return temperature sensor T4 is positioned at the input end of the hot water return circulating pump 5, the pipeline between the heat collecting water tank 2 and the constant temperature water tank 3 is connected with a hot water return pipe through a temperature control three-way valve 9, the joint of the temperature control three-way valve 9 and the hot water return pipe is positioned between the hot water return circulating pump 5 and the heat collecting water tank 2, and the top outlet of the constant temperature water tank 3 is connected with a hot water supply pipe;
the auxiliary heating circulating system comprises a second heat exchange tube 11 and an auxiliary heating circulating pump 6, and the second heat exchange tube 11 and the auxiliary heating circulating pump 6 are connected in series and externally connected with auxiliary heating equipment;
first heat exchange tube 10 is installed in the inside of thermal-arrest water pitcher 2, second heat exchange tube 11 is installed in the inside of constant temperature water pitcher 3, controller electric connection thermal-arrest circulating pump 4, electronic three-way valve 8, first temperature sensor T1, second temperature sensor T5, thermal-arrest water pitcher temperature sensor T2, constant temperature water pitcher temperature sensor T3, hot water return water temperature sensor T4, hot water return water circulating pump 5 and auxiliary heating circulating pump 6 respectively.
Preferably, the auxiliary heating device is a heat pump, a boiler or a steam boiler. Preferably, the hot water return pipe and the solar heat collection circulating pipeline are both provided with expansion valves.
Compared with the prior art, the beneficial effects of the utility model are that: the automatic switching device is adopted, namely, the temperature control three-way valve is additionally arranged on the position of the hot water return pipeline, the hot water return temperature T4 is compared with the temperature T2 of the heat collection water tank and the temperature T3 of the constant temperature water tank, the hot water return lower than the temperature of the heat collection water tank is switched to the heat collection water tank, or the hot water return higher than the temperature of the heat collection water tank is switched to the constant temperature water tank, and the solar energy is fully utilized to heat the return water. The solar water heater is suitable for all the existing water heating systems adopting double-water-tank solar energy coupling auxiliary heating equipment. When the temperature of the hot water return water is lower than that of the heat collecting water tank, the hot water return water flows into the heat collecting water tank through automatic switching of the three-way valve.
The utility model provides a hot water circulating return water can not make full use of solar energy, the problem of the extravagant auxiliary heating equipment energy promptly.
Drawings
Fig. 1 is a schematic diagram of the system of the present invention.
Reference numbers in the figures: the solar heat collector comprises a solar heat collector 1, a heat collection water tank 2, a constant temperature water tank 3, a heat collection circulating pump 4, a hot water return circulating pump 5, an auxiliary heating circulating pump 6, an air cooling radiator 7, an electric three-way valve 8, a temperature control three-way valve 9, a first heat exchange tube 10, a second heat exchange tube 11, a first temperature sensor T1, a temperature sensor T2 of the heat collection water tank, a temperature sensor T3 of the constant temperature water tank, a hot water return temperature sensor T4 and a second temperature sensor T5.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1, the present invention provides a technical solution: a hot water return system for improving the solar energy utilization rate comprises a solar heat collection circulating pipeline, an auxiliary heating circulating system, a hot water supply and return circulating pipeline and a controller;
the solar heat collection circulating pipeline comprises a solar heat collector 1, a heat collection circulating pump 4, a first heat exchange pipe 10, an air-cooled radiator 7 and an electric three-way valve 8, wherein the solar heat collector 1, the heat collection circulating pump 4 and the first heat exchange pipe 10 are sequentially connected in series through a pipeline to form the circulating pipeline, the air-cooled radiator 7 is connected in parallel on the pipeline between the solar heat collector 1 and the first heat exchange pipe 10, the inlet of the air-cooled radiator 7 is connected with the pipeline between the solar heat collector 1 and the first heat exchange pipe 10 through the electric three-way valve 8, the inlet of the solar heat collector 1 is connected with a second temperature sensor T3583, and the outlet of the solar heat collector 1 is connected with;
the hot water supply and return circulation pipeline comprises a heat collection water tank 2, a heat collection water tank temperature sensor T2, a constant temperature water tank 3, a constant temperature water tank temperature sensor T3, a hot water return temperature sensor T4, a hot water return circulation pump 5 and a temperature control three-way valve 9, wherein the bottom inlet of the heat collection water tank 2 is connected with a municipal water supply pipeline and a hot water return pipe, and the top outlet of the heat collecting water tank 2 is connected with the bottom inlet of the constant temperature water tank 3 through a pipeline, a hot water return circulating pump 5 and a hot water return temperature sensor T4 are arranged on the hot water return pipe, the hot water return temperature sensor T4 is positioned at the input end of the hot water return circulating pump 5, the pipeline between the heat collecting water tank 2 and the constant temperature water tank 3 is connected with a hot water return pipe through a temperature control three-way valve 9, the joint of the temperature control three-way valve 9 and the hot water return pipe is positioned between the hot water return circulating pump 5 and the heat collecting water tank 2, and the top outlet of the constant temperature water tank 3 is connected with a hot water supply pipe;
the auxiliary heating circulating system comprises a second heat exchange tube 11 and an auxiliary heating circulating pump 6, and the second heat exchange tube 11 and the auxiliary heating circulating pump 6 are connected in series and externally connected with auxiliary heating equipment;
first heat exchange tube 10 is installed in the inside of thermal-arrest water pitcher 2, second heat exchange tube 11 is installed in the inside of constant temperature water pitcher 3, controller electric connection thermal-arrest circulating pump 4, electronic three-way valve 8, first temperature sensor T1, second temperature sensor T5, thermal-arrest water pitcher temperature sensor T2, constant temperature water pitcher temperature sensor T3, hot water return water temperature sensor T4, hot water return water circulating pump 5 and auxiliary heating circulating pump 6 respectively.
The auxiliary heating equipment is a heat pump, a boiler or a steam boiler. And expansion valves are arranged on the hot water return pipe and the solar heat collection circulating pipeline.
The utility model discloses a theory of operation: 1. heat collection circulation: when the temperature difference between the outlet temperature of the heat collector and the temperature of the heat collection water tank is more than or equal to 8 ℃, the solar heat collection circulating pump is started, and the solar system heats the solar heat storage water tank; and when the temperature T1-T2 is less than or equal to 2 ℃, stopping the solar heat collection circulating pump.
2. Auxiliary heating: when the temperature T3 of the constant-temperature water tank is less than the set water supply temperature 60 ℃ (adjustable), the auxiliary heating circulating pump is started, and when the water tank is circularly heated to the set temperature, the circulating pump is stopped; when the temperature T3 of the constant-temperature water tank is more than or equal to the set water supply temperature of 60 ℃ (adjustable), the auxiliary heating circulating pump is not started. The temperature parameters can be set.
3. And (3) system water return control: the system is designed to have hot water supply temperature of 60 ℃ and return water temperature of 40 ℃. When the return water temperature T4 is less than 40 ℃, the return water circulating pump is started; and when the return water temperature T4 is higher than 45 ℃, the return water circulating pump is stopped.
4. Controlling a water return three-way valve: when the backwater temperature T4 is not less than T2, the three-way valve is switched to backwater to the constant-temperature water tank; when the backwater temperature T4 is less than T2, the three-way valve is switched to backwater to the solar heat collection water tank.
5. Overheat prevention function
(1) Overheat protection of the heat collector: an air-cooled radiator and a three-way electric valve are installed on a roof heat collection circulating pipeline, when the temperature T2 of a solar heat collection water tank is more than or equal to 65 ℃ and the temperature T1 of a heat collector is more than 90 ℃, the three-way switching valve is automatically switched to the d-f direction, an air-cooled radiating unit is started, when the temperature T2 of the solar heat collection water tank is less than 60 ℃, the radiating is stopped, the three-way switching valve is automatically switched to the d-c direction, and the air-cooled radiating unit is closed.
(2) And (3) water outlet overheating protection: when the temperature of the outlet water is controlled not to exceed 60 ℃ (can be set), scalding is prevented.
6. Pipeline freeze protection: the system adopts glycol antifreeze as a heat exchange medium. Meanwhile, an anti-freezing circulation is designed, when the temperature T5 at the lowest point of the heat collecting pipeline is less than 4 ℃, the solar heat collecting circulation pump is started, and when the temperature T5 reaches 8 ℃, the solar heat collecting circulation pump is closed, so that the heat collector is effectively protected from working normally in severe cold seasons in winter.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (3)
1. The utility model provides an improve hot water return system of solar energy utilization ratio which characterized in that: the solar energy heat collection system comprises a solar energy heat collection circulating pipeline, an auxiliary heating circulating system, a hot water supply and return circulating pipeline and a controller;
the solar heat collection circulating pipeline comprises a solar heat collector (1), a heat collection circulating pump (4), a first heat exchange pipe (10), an air-cooled radiator (7) and an electric three-way valve (8), wherein the solar heat collector (1), the heat collection circulating pump (4) and the first heat exchange pipe (10) are sequentially connected in series through a pipeline to form the circulating pipeline, the air-cooled radiator (7) is connected in parallel on the pipeline between the solar heat collector (1) and the first heat exchange pipe (10), the inlet of the air-cooled radiator (7) is connected with the pipeline between the solar heat collector (1) and the first heat exchange pipe (10) through the electric three-way valve (8), the inlet of the solar heat collector (1) is connected with a second temperature sensor (T5), and the outlet of the solar heat collector (1) is connected with the first temperature;
the hot water supply and return circulation pipeline comprises a heat collection water tank (2), a heat collection water tank temperature sensor (T2), a constant temperature water tank (3), a constant temperature water tank temperature sensor (T3), a hot water return water temperature sensor (T4), a hot water return water circulating pump (5) and a temperature control three-way valve (9), wherein the bottom inlet of the heat collection water tank (2) is connected with a municipal water supply pipeline and a hot water return water pipe, the top outlet of the heat collection water tank (2) is connected with the bottom inlet of the constant temperature water tank (3) through a pipeline, the hot water return water circulating pump (5) and the hot water return water temperature sensor (T4) are installed on the hot water return water pipe, the hot water return water temperature sensor (T4) is located at the input end of the hot water return water circulating pump (5), the pipeline between the heat collection water tank (2) and the constant temperature water tank (3) is connected with the hot water return water pipe through the temperature control (2) The top outlet of the constant temperature water tank (3) is connected with a hot water supply pipe;
the auxiliary heating circulating system comprises a second heat exchange pipe (11) and an auxiliary heating circulating pump (6), and the second heat exchange pipe (11) and the auxiliary heating circulating pump (6) are connected in series and externally connected with auxiliary heating equipment;
first heat exchange tube (10) are installed in the inside of thermal-arrest water pitcher (2), the inside at constant temperature water pitcher (3) is installed in second heat exchange tube (11), controller electric connection thermal-arrest circulating pump (4), electronic three-way valve (8), first temperature sensor (T1), second temperature sensor (T5), thermal-arrest water pitcher temperature sensor (T2), constant temperature water pitcher temperature sensor (T3), hot water return temperature sensor (T4), hot water return circulating pump (5) and auxiliary heating circulating pump (6) respectively.
2. The hot water backwater system for improving the solar energy utilization rate according to claim 1, characterized in that: the auxiliary heating equipment is a heat pump, a boiler or a steam boiler.
3. The hot water backwater system for improving the solar energy utilization rate according to claim 1, characterized in that: and expansion valves are arranged on the hot water return pipe and the solar heat collection circulating pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921053812.7U CN210951918U (en) | 2019-07-08 | 2019-07-08 | Hot water return system for improving solar energy utilization rate |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921053812.7U CN210951918U (en) | 2019-07-08 | 2019-07-08 | Hot water return system for improving solar energy utilization rate |
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| CN210951918U true CN210951918U (en) | 2020-07-07 |
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| CN201921053812.7U Active CN210951918U (en) | 2019-07-08 | 2019-07-08 | Hot water return system for improving solar energy utilization rate |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112377976A (en) * | 2020-11-28 | 2021-02-19 | 北京派捷暖通环境工程技术有限公司 | Heating system and method |
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2019
- 2019-07-08 CN CN201921053812.7U patent/CN210951918U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112377976A (en) * | 2020-11-28 | 2021-02-19 | 北京派捷暖通环境工程技术有限公司 | Heating system and method |
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