A jacketed flat plate solar water heater

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By setting a guide plate in the jacket cavity to form an S-shaped flow channel, the problem of insufficient medium flow in traditional flat-plate solar water heaters is solved, the heat exchange efficiency is improved, free installation is achieved, and the contact time and area between the medium and the outer wall of the inner tank are enhanced.

CN224534515UActive Publication Date: 2026-07-21SUNRAIN GRP CO LTD +1

Patent Information

Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner: SUNRAIN GRP CO LTD
Filing Date: 2025-08-14
Publication Date: 2026-07-21

AI Technical Summary

Technical Problem

Traditional flat-plate solar water heaters suffer from insufficient medium flow in the jacketed tank, resulting in slow heat circulation, low heat exchange efficiency, and high installation dependence, which limits installation flexibility.

Method used

A guide plate is installed inside the jacket cavity to divide the jacket cavity into S-shaped flow channels with gradually changing width. The guide plate causes the medium to form a vertical drop in the jacket cavity, driving the medium to form a pressure difference. The cross-sectional area of the guide channel decreases along the flow direction of the medium to accelerate the flow.

Benefits of technology

It significantly improves the flow velocity and heat exchange efficiency of the medium in the jacket cavity, reduces the dependence on high elevation difference, and enables free installation and more efficient heat exchange.

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Figure CN224534515U_ABST

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Abstract

The utility model relates to solar water heater technical field, concretely relates to a jacketed flat plate solar water heater, including jacketed sleeve heat exchange water tank, jacketed sleeve heat exchange water tank includes inner bag, and the outer wrapping of inner bag jacketed sleeve, and the inner wall of jacketed sleeve and the outer wall of inner bag constitute the jacketed cavity between, one side of jacketed cavity is equipped with cold medium import, and the other end of jacketed cavity is equipped with hot medium export, and the baffle of being close to hot medium export one side is equipped with in jacketed cavity, and the baffle surrounds in jacketed cavity middle and lower part, and the baffle separates jacketed cavity into the flow guide flow channel of forced medium along extension flow path, and the flow guide flow channel is the S type flow channel of width gradual change, and the baffle makes medium form vertical fall difference in jacketed cavity, and drives medium to form pressure difference, and the S type flow channel forces to extend the flow distance and heat exchange area of medium in jacketed cavity, and the cross -sectional area change of flow guide flow channel produces the venturi effect, promotes medium flow rate, ensures that medium flows fully in jacketed cavity, and significantly improves heat exchange effect.

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Claims

1. A jacketed flat-plate solar water heater, characterized in that, The device includes a jacketed hot water exchanger tank, which includes an inner tank (1) and a jacketed sleeve (2) wrapped around the inner tank. The inner wall of the jacketed sleeve and the outer wall of the inner tank form a jacketed cavity (3). A cold medium inlet (201) is provided on one side of the jacketed cavity, and a hot medium outlet (202) is provided at the other end of the jacketed cavity. A guide plate (5) is provided in the jacketed cavity near the hot medium outlet. The guide plate surrounds the lower part of the jacketed cavity and divides the jacketed cavity into a guide channel (4) that forces the medium to flow along an extended path. The guide channel is an S-shaped channel with a gradually changing width. The guide plate causes the medium to form a vertical drop in the jacketed cavity, driving the medium to form a pressure difference. The cross-sectional area of the guide channel decreases along the flow direction of the medium to accelerate the flow.

2. The jacketed flat-plate solar water heater according to claim 1, characterized in that, The guide plate (5) is disposed on the front of the jacket cavity. The guide plate extends from the bottom of the jacket cavity to the upper part of the jacket cavity, and the cross-sectional area of the guide channel decreases by 5%-30% along the direction of medium flow.

3. The jacketed flat-plate solar water heater according to claim 2, characterized in that, The guide plate (5) is inclined in the jacket cavity, forming an angle of 70°-90° with the bottom wall of the jacket cylinder in the horizontal direction.

4. The jacketed flat-plate solar water heater according to claim 3, characterized in that, The guide plate (5) is made of carbon steel plate with a thickness of 1.5mm-2mm. The guide plate is shaped to match the inner wall of the jacket and is fixedly installed vertically or inclined to the jacket body. The guide plate is shaped to match the outer wall of the inner liner and is fixedly installed to the outer wall of the inner liner.

5. The jacketed flat-plate solar water heater according to claim 4, characterized in that, The distance between the jacket sleeve (2) and the inner liner (1) is 15mm-20mm.

6. The jacketed flat-plate solar water heater according to claim 5, characterized in that, The cold medium inlet (201) and the hot medium outlet (202) are connected to the collector tube (6) via a connecting pipe.

7. The jacketed flat-plate solar water heater according to claim 6, characterized in that, The inner liner (1) is a stainless steel cylinder with an enamel layer (101) on the inner surface.