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Solar thermal collector freezing prevention system

A technology of solar collectors and antifreeze systems, applied in the field of collector antifreeze systems, can solve the problems of large initial investment in antifreeze systems, cracks in valves and pipes, residual moisture in the system, etc., to solve the problem of cracks in pipes and valves , Put an end to environmental pollution problems, and reduce the effect of initial investment costs

Inactive Publication Date: 2010-06-02
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of large initial investment of the antifreeze system and the problem of easy environmental pollution caused by the residual water in the system easily caused by the return and emptying system, and the freezing and cracking of valves and pipelines. Solar collector antifreeze system

Method used

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  • Solar thermal collector freezing prevention system
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  • Solar thermal collector freezing prevention system

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specific Embodiment approach 1

[0007] Specific implementation mode one: combine figure 1 Describe this embodiment, a kind of solar heat collector antifreeze system of this embodiment includes the first sewage heat exchanger 1, the solar heat collector 2, the first circulating water pump 4, the first heat user terminal 5, the high temperature sewage pipe 6, Low-temperature sewage pipe 7, circulating working fluid inlet pipe 8, circulating working medium return pipe 9, first valve 10, second valve 11 and first connecting pipe 12, the first sewage heat exchanger 1, solar heat collector 2 Arranged side by side with the first heat user terminal 5, the first sewage heat exchanger 1, the solar heat collector 2 and the first heat user terminal 5 are connected in turn through the circulating working fluid inlet pipe 8, and the first sewage heat exchanger 1 communicates with the first heat user terminal 5 through a circulating working medium return pipe 9, and the first circulating water pump 4 is installed on the ci...

specific Embodiment approach 2

[0008] Specific implementation mode two: combination figure 1 To illustrate this embodiment, the antifreeze system of this embodiment is also added with a first expansion tank 3 and a second communication pipe 13, the first expansion tank 3 communicates with the circulating working fluid inlet pipe 8 through the second communication pipe 13, and the second The two connecting pipes 13 are located on the circulating working fluid inlet pipe 8 between the solar heat collector 2 and the first circulating water pump 4 . Such setting plays the role of constant pressure supply. Other compositions and connections are the same as in the first embodiment.

[0009] The non-antifreeze operation mode of the antifreeze system in this embodiment: At this time, the circulating working medium in the antifreeze system of the solar collector is higher than its freezing point by more than 3°C. Since the system does not need antifreeze at this time, the first valve 10 is opened, and the second va...

specific Embodiment approach 3

[0011] Specific implementation mode three: combination figure 2 Describe this embodiment, the antifreeze system and sewage source heat pump coupling system of this embodiment consists of a sewage source heat pump system, a first sewage heat exchanger 1, a solar heat collector 2, a first expansion tank 3, a first circulating water pump 4, a first A hot user terminal 5, high temperature sewage pipe 6, low temperature sewage pipe 7, circulating working fluid inlet pipe 8, circulating working medium return pipe 9, first valve 10, second valve 11, first communicating pipe 12 and second communicating pipe 13 composition; the first sewage heat exchanger 1, solar heat collector 2 and first heat user terminal 5 are arranged side by side, and the first sewage heat exchanger 1, solar heat collector 2 and first heat user terminal 5 The first sewage heat exchanger 1 and the first heat user terminal 5 are connected in series through the circulating working medium return pipe 9 in turn, and...

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Abstract

The invention discloses a solar thermal collector freezing prevention system and relates to a thermal collector freezing prevention system. The invention solves the problem of frost cracks of valves and pipelines due to residual water in the system by a backflow and exhaust system and the problems of large initial investment and easy environmental pollution of a freezing prevention liquid system. A sewage heat exchanger, a solar thermal collector and the terminal of a heat user are sequentially communicated by a cycle working medium charge pipe; the sewage heat exchanger is communicated with the terminal of the heat user by a cycle working medium backflow pipe; a circulating water pump is installed on the cycle working medium charge pipe; one end of a first communicating pipe is communicated with the cycle working medium charge pipe, and the other end of the first communicating pipe is communicated with the cycle working medium backflow pipe; a first valve is installed on the first communicating pipe, a second valve is installed on the cycle working medium backflow pipe, and a high-temperature sewage pipe and a low-temperature sewage pipe are installed on the sewage heat exchanger. The invention reduces the initial investment of a freezing prevention liquid system of the solar thermal collector and solves the problems of environmental pollution and frost cracks of the pipelines and the valves.

Description

technical field [0001] The invention relates to a heat collector antifreeze system. Background technique [0002] Due to the low outdoor temperature in winter in some areas of our country, when using solar energy, the problem of antifreezing of solar collectors must be considered. In the antifreeze design of solar collectors, national standards generally recommend emptying systems, draining systems and antifreeze systems. Due to improper installation and equipment problems, the drainage and emptying system can easily cause residual water in the system, resulting in cracking of valves and pipelines, affecting the safe operation of the system. The antifreeze system, especially the high-concentration antifreeze system, has a relatively large initial investment, and its price is about 150 to 200 yuan per square meter of solar collectors, and because the solar collectors are located outdoors, they are easily affected by external forces and cause leakage , thus causing environme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24J2/42F24S90/00
CPCY02E10/40
Inventor 姜益强姚杨柴永金
Owner HARBIN INST OF TECH
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