Solar water heater with built-in water inlet preheating device

Abstract

The utility model discloses a solar water heater with a built-in water inlet preheating device. The solar water heater comprises a water storage tank; the preheating pipe is arranged in the water storage tank; the water inlet connector is fixedly arranged on the tank body of the water storage tank, and one end is connected with the preheating pipe; and the preheating pipe extends for a certain length in the box body. The preheating pipe is connected to the water inlet connector, so that cold water entering the water storage tank firstly flows through the preheating pipe and then enters the water storage tank, the cold water is preliminarily preheated through heat in the water storage tank in the process of flowing through the preheating pipe, and the temperature difference between water flowing out of the preheating pipe and the vacuum pipe is reduced; therefore, the phenomenon that the vacuum pipe is exploded after suddenly touching cold water is avoided, and the use safety of the water heater is improved.

Description

Technical Field

[0001] The utility model belongs to the field of solar water heaters, and in particular relates to a solar water heater with a built-in water preheating device. Background Art

[0002] Solar water heaters are heating devices that convert sunlight energy into thermal energy, heating water from low temperature to high temperature to meet people's hot water needs in life and production, including vacuum tube solar water heaters and flat plate solar water heaters. Among them, vacuum tube solar water heaters are mainly composed of collectors, water tanks, brackets and other related parts and accessories, and are fixedly installed on the roof or balcony. However, the vacuum tube is made of glass. When the water heater is replenished with cold water, the inlet water temperature is low and the temperature inside the vacuum tube is high. The high temperature difference can easily cause the vacuum tube to burst, which in turn causes the water in the water tank to flow out, making the water heater unusable. At the same time, the bursting of the vacuum tube also poses a risk of injury and a safety hazard.

[0003] In view of this, the present utility model is proposed. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a solar water heater with a built-in water preheating device, which can preheat the water entering the water tank to avoid a high temperature difference with the vacuum tube.

[0005] In order to solve the above technical problems, the basic concept of the technical solution adopted by the utility model is:

[0006] A solar water heater with a built-in water preheating device is provided, comprising:

[0007] Water storage tanks;

[0008] A preheating pipe is arranged in the water storage tank;

[0009] A water inlet interface is fixedly arranged on the body of the water storage tank, and one end of the water inlet interface is connected to the preheating pipe;

[0010] The preheating tube extends a certain length in the box.

[0011] In the above solution, a plurality of vacuum tubes are arranged in the water storage tank, and the preheating tube is arranged close to at least part of the vacuum tubes.

[0012] In the above scheme, one end of the vacuum tube is located at the bottom of the water tank, a plurality of the vacuum tubes are arranged horizontally and evenly distributed in the water tank, and the preheating tube is arranged along the direction in which the vacuum tubes are arranged.

[0013] In the above scheme, the preheating tube is distributed in the water storage tank along the bottom, and the preheating tube is arranged parallel to the vacuum tube and has basically the same height.

[0014] In the above solution, the preheating tube overlaps laterally with at least half of the vacuum tubes in the projection direction.

[0015] In the above solution, the water inlet interface is arranged at the bottom of the water storage tank and is located at the same horizontal plane as the preheating tube.

[0016] In the above scheme, the preheating tube is one or more of a spiral tube, a straight tube, and a serpentine coil, and the preheating tube is made of metal.

[0017] In the above solution, the preheating tube is a straight tube extending laterally at the water outlet end.

[0018] In the above scheme, the preheating tube and the water inlet interface are fixed by welding, or the preheating tube and the water inlet interface are fixed by spirals, or the preheating tube and the water inlet interface are fixed by plugging.

[0019] In the above solution, a sealing ring is provided on the outer periphery of the water inlet interface to seal between the water inlet interface and the water storage tank.

[0020] After adopting the above technical scheme, the utility model has the following beneficial effects compared with the prior art.

[0021] A preheating pipe is connected to the water inlet interface so that the cold water entering the water tank first flows through the preheating pipe and then enters the water tank. In the process of the cold water flowing through the preheating pipe, it is preliminarily preheated by the heat in the water tank. The temperature difference between the water flowing out of the preheating pipe and the vacuum tube is reduced, thereby avoiding the phenomenon of the vacuum tube exploding after suddenly encountering cold water, thereby increasing the safety of the water heater.

[0022] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation on the present invention. Obviously, the accompanying drawings described below are only some embodiments. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without creative work. In the accompanying drawings:

[0024] Figure 1 It is a partial cross-sectional view of the right side of the solar water heater with a built-in water preheating device of the utility model;

[0025] Figure 2 yes Figure 1 AA section view;

[0026] Figure 3 The utility model is a schematic diagram of the structure of the water inlet interface and the preheating pipe of the solar water heater with a built-in water inlet preheating device.

[0027] In the figure: 10, water storage tank; 11, water inlet interface; 20, preheating pipe; 30, sealing ring; 40, exhaust port; 50, water outlet joint; 60, vacuum tube.

[0028] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but rather to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. The following embodiments are used to illustrate the utility model but are not used to limit the scope of the utility model.

[0030] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0031] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] like Figures 1 to 3 As shown, the utility model provides a solar water heater with a built-in water preheating device, including: a water tank 10; a preheating pipe 20, which is arranged in the water tank 10; a water inlet interface 11, which is fixedly arranged on the box body of the water tank 10 and connected to the preheating pipe 20 at one end; the preheating pipe 20 extends a certain length in the box body.

[0033] The utility model connects the preheating pipe 20 at the water inlet interface 11, so that the cold water entering the water storage tank 10 first flows through the preheating pipe 20, and then enters the water storage tank 10. In the process of the cold water flowing through the preheating pipe 20, it is preliminarily preheated by the heat in the water storage tank 10, and the temperature difference between the water flowing out of the preheating pipe 20 and the vacuum tube 60 is reduced, thereby avoiding the phenomenon of the vacuum tube 60 bursting after suddenly encountering the cold water, thereby increasing the safety of the water heater.

[0034] The preheating pipe 20 can be set at any position in the water tank 10, such as the bottom, middle or top. The heat inside the water tank 10 can be used to heat the cold water in the preheating pipe 20 or the hot water remaining at the bottom of the water tank 10 can be used for preheating.

[0035] In this embodiment, preferably, a plurality of vacuum tubes 60 are provided in the water storage tank 10, and the preheating tube 20 is provided close to at least part of the vacuum tubes 60. Since the preheating tube 20 can isolate the incoming cold water from the vacuum tube 60, a large temperature difference will not be generated between the vacuum tube 60 when the cold water is introduced, and the vacuum tube 60 can be better adapted to the preheated cold water, further reducing the temperature difference between the cold water entering the water storage tank 10 after preheating and the vacuum tube 60.

[0036] Furthermore, one end of the vacuum tube 60 is located at the bottom of the water tank 10, and a plurality of vacuum tubes 60 are arranged horizontally and evenly in the water tank 10, and the preheating tube 20 is arranged along the direction in which the vacuum tubes 60 are arranged. The direction in which the vacuum tubes 60 are arranged is the length direction of the water tank 10, and the preheating tube 20 is also arranged along the length direction of the water tank 10, so that the preheating tube 20 can be better extended in the water tank 10 and is easy to design.

[0037] Furthermore, the preheating tube 20 is distributed along the bottom of the water tank 10, and the preheating tube 20 is arranged in parallel with the vacuum tube 60 and has substantially the same height. When the water in the water tank 10 is insufficient and cold water needs to be added, there will be a small amount of residual hot water at the bottom of the water tank 10. The preheating tube 20 is arranged at the bottom, and the cold water in the preheating tube 20 can be preheated by relying on the heat of the residual hot water in the water tank 10, so that the heating effect is better and the speed is faster.

[0038] Furthermore, the preheating tube 20 overlaps with at least half of the vacuum tube 60 in the projection direction. Since the preheating tube 20 and the vacuum tube 60 are arranged in parallel, the preheating tube 20 and the vacuum tube 60 can overlap in one projection direction, and the length of the preheating tube 20 is long enough to fully preheat the cold water in the preheating tube 20 and enable the vacuum tube 60 to better adapt to the temperature at the preheating tube 20.

[0039] Furthermore, the water inlet interface 11 is arranged at the bottom of the water storage tank 10 and is located at the same horizontal plane as the preheating pipe 20. It is convenient for the water to flow at the water inlet, and the water inlet interface 11 is horizontally connected to the preheating pipe 20, which is convenient for connection and the connection structure is more stable.

[0040] In this embodiment, the preheating tube 20 can be a spiral structure, a straight tube or a serpentine coil or a pipe of other structures. The shape of the preheating tube 20 can be designed according to actual conditions and is not limited here. The longer the preheating tube 20 is, the better the preheating effect is. Therefore, the length of the preheating tube 20 can also be selected according to actual conditions.

[0041] In this embodiment, the preheating tube 20 is preferably made of metal. It has good thermal conductivity. Furthermore, the preheating tube 20 is made of copper or stainless steel, which has good thermal conductivity, so it can effectively preheat the cold water. The preheating tube 20 is not easy to corrode, so it is not easy to be damaged, has a long service life, and can reduce replacement and maintenance.

[0042] In this embodiment, the preheating pipe 20 is preferably a straight pipe extending transversely at the water outlet end, so that the cold water flows out transversely after being preheated, and the straight pipe structure makes the water flow stable and the flow rate uniform.

[0043] In this embodiment, the preheating tube 20 and the water inlet interface 11 can be fixed by welding, or the preheating tube 20 and the water inlet interface 11 are respectively provided with matching external threads and internal threads, and the preheating tube 20 and the water inlet interface 11 are spirally fixed, or the preheating tube 20 and the water inlet interface 11 are plugged and fixed. The fixing method of the preheating tube 20 and the water inlet interface 11 is not limited, as long as the fixing structure is stable, and can be selected according to actual conditions.

[0044] The solar water heater with built-in water preheating device provided by the utility model further includes: a sealing ring 30, which is arranged on the outer periphery of the water inlet interface 11, so as to seal the water inlet interface 11 and the water storage tank 10; an exhaust port 40, which is arranged on the body of the water storage tank 10, and is used to balance the air pressure difference between the water storage tank 10 and the outside; and a water outlet joint 50, which is arranged on the body of the water storage tank 10, and is used to discharge water. Similarly, the water outlet joint 50 and the water storage tank 10 are also sealed.

[0045] The preheating process of the solar water heater with built-in water preheating device provided by the utility model is as follows:

[0046] When the water storage tank 10 needs to be replenished with water, cold water is introduced through the water inlet interface 11. After passing through the water inlet interface 11, the cold water first flows through the preheating pipe 20. The cold water in the preheating pipe 20 is preliminarily preheated by the heat in the water tank, and then flows out of the preheating pipe 20 into the water storage tank 10.

[0047] The utility model connects a preheating pipe at the water inlet interface so that cold water entering the water tank first flows through the preheating pipe and then enters the water tank. In the process of the cold water flowing through the preheating pipe, it is preliminarily preheated by the heat in the water tank, and the temperature difference between the water flowing out of the preheating pipe and the vacuum tube is reduced, thereby avoiding the phenomenon of the vacuum tube bursting after suddenly contacting the cold water, thereby increasing the safety of the water heater.

[0048] The above is only a preferred embodiment of the present invention, and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technician familiar with this patent can make some changes or modifications to equivalent embodiments of equivalent changes using the technical content suggested above without departing from the scope of the technical solution of the present invention. The implementation schemes in the above embodiments can also be further combined or replaced. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the present invention.

Claims

1. A solar water heater with a built-in water preheating device, characterized in that: include: Water storage tanks; A preheating pipe is arranged in the water storage tank; A water inlet interface is fixedly arranged on the body of the water storage tank, and one end of the water inlet interface is connected to the preheating pipe; The preheating tube extends a certain length in the box.

2. The solar water heater with built-in water preheating device according to claim 1, characterized in that: There are multiple vacuum tubes in the water storage tank, and the preheating tube is arranged close to at least part of the vacuum tubes.

3. The solar water heater with built-in water preheating device according to claim 2, characterized in that: One end of the vacuum tube is located at the bottom of the water tank, a plurality of the vacuum tubes are arranged horizontally and evenly in the water tank, and the preheating tube is arranged along the direction in which the vacuum tubes are arranged.

4. The solar water heater with built-in water preheating device according to claim 3, characterized in that: The preheating tube is distributed in the water storage tank along the bottom, and the preheating tube is arranged in parallel with the vacuum tube and has substantially the same height.

5. The solar water heater with built-in water preheating device according to claim 4, characterized in that: The preheating tube laterally overlaps with at least half of the vacuum tube in the projection direction.

6. The solar water heater with built-in water preheating device according to claim 5, characterized in that: The water inlet interface is arranged at the bottom of the water storage tank and is located at the same horizontal plane as the preheating pipe.

7. The solar water heater with a built-in water preheating device according to any one of claims 1 to 6, characterized in that: The preheating tube is one or more of a spiral tube, a straight tube, and a serpentine coil, and the preheating tube is made of metal.

8. The solar water heater with built-in water preheating device according to claim 7, characterized in that: The preheating pipe is a straight pipe extending transversely at the water outlet end.

9. The solar water heater with a built-in water preheating device according to any one of claims 1 to 6, characterized in that: The preheating tube and the water inlet interface are fixed by welding, or the preheating tube and the water inlet interface are fixed by spirals, or the preheating tube and the water inlet interface are fixed by plugging.

10. The solar water heater with a built-in water preheating device according to any one of claims 1 to 6, characterized in that: A sealing ring is provided on the outer periphery of the water inlet interface to seal the water inlet interface and the water storage tank.

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