A rapid heating water heater

Abstract

The application discloses a kind of fast heating water heater.It includes heating pipe, metal sleeve that is sleeved in the periphery of heating pipe and the flow channel for making fluid flow formed between heating pipe and metal sleeve, metal sleeve is provided with several half-ring recesses staggered arrangement to make flow channel form spiral flow channel to increase the flow distance of fluid.The advantages are: can be heated fully, greatly improve the thermal efficiency, furthermore, by setting two groups of half-ring recesses on the outer surface of metal sleeve, which are oppositely arranged along the center line of its cross section, thereby the fluid is divided into two ways, more sufficient heating can be obtained, the thermal efficiency is further improved, in addition, each group of half-ring recesses is pressed on the outer surface of heating pipe to form a heating structure, the structure design is compact, so that the volume of the heater can be greatly reduced while achieving the effect of fast heating, which can be applied to fast water heater, water dispenser and other aspects, and has wide application.

Description

TECHNICAL FIELD

[0001] The present application relates to a water heater, in particular to a fast heating water heater. BACKGROUND

[0002] Water heating electric heating elements are widely used in various fields of heating water, and some applications particularly pursue fast heating, such as fast water heater, instant hot water dispenser, instant coffee machine, etc. These application occasions are generally small in size, and if the size of the heater is reduced, the size of these electrical appliances can be correspondingly reduced. At present, the demand for these electrical appliances is in the hundreds of millions, therefore, how to reduce the size of the heater to the greatest extent will have important application prospects. In addition, the current fast water heater and water dispenser mostly adopt a tank structure, that is, a tank body is made of stainless steel or plastic, and the heating pipe is placed in the tank as a whole. The whole tank of water is heated together when heating, which has a certain delay from the start of heating to the output of hot water, and it is difficult to realize the instant heating function. The usual way is to increase the power of the electric heating pipe, but the current also increases, which has many limitations in application. SUMMARY

[0003] The technical problem to be solved by the present application provides a fast heating water heater which not only saves space but also has high heating efficiency.

[0004] In order to solve the above technical problems, the fast heating water heater of the present application comprises a heating pipe, a metal sleeve sleeved on the periphery of the heating pipe, and a flow passage formed between the heating pipe and the metal sleeve for the flow of fluid. The metal sleeve is provided with a plurality of half-ring recesses arranged staggered to form a spiral flow channel for the flow passage to increase the flow distance of the fluid.

[0005] The metal sleeve is provided with a water inlet and a water outlet respectively located at both ends of the heating pipe, and each of the half-ring recesses is located between the water inlet and the water outlet.

[0006] The outer surface of the metal sleeve has two groups of half-ring recesses arranged oppositely along the center line of the cross section, and the two groups of half-ring recesses are uniformly staggered along the length direction of the metal sleeve to form the spiral flow channel.

[0007] Each group of half-ring recesses is pressed on the outer surface of the heating pipe.

[0008] The two ends of the metal sleeve are provided with necked sections, and the two ends of the heating pipe extend out of the necked sections.

[0009] The metal sleeve is a stainless steel pipe.

[0010] The water inlet is connected with a water inlet pipe, and the water outlet is connected with a water outlet pipe.

[0011] After adopting the above structure, a plurality of staggered semi-annular recesses are provided on the metal sleeve to form a spiral flow channel to increase the circulation distance of the fluid, so that it can be fully heated and the thermal efficiency is greatly improved. Furthermore, two groups of semi-annular recesses are provided on the outer surface of the metal sleeve and are relatively arranged along the center line of its cross section, thereby dividing the fluid into two paths, which can be more fully heated and further improve the thermal efficiency. In addition, each group of semi-annular recesses is pressed onto the outer surface of the heating tube to form a heating structure. Its structural design is compact, so that the volume of the heater can be greatly reduced while achieving a rapid heating effect. It can be applied to instant water heaters, water dispensers, etc., and is extremely widely used. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the main structure of the rapid water heating heater of the present invention;

[0013] Figure 2 This is a schematic top view of the structure of the rapid water heating heater of the present invention;

[0014] Figure 3 for Figure 2 Schematic diagram of the structure of the AA section;

[0015] Figure 4 This is a schematic diagram of the main structure of the metal sleeve in the present invention;

[0016] Figure 5 It is a schematic diagram of the top structure of the metal sleeve in the present invention. Implementation Method

[0017] The rapid water heating heater of the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0018] As shown in the figure, the rapid heating water heater of the present invention includes a heating tube 1, a metal sleeve 2 sleeved on the outer periphery of the heating tube, and a circulation channel 3 formed between the heating tube 1 and the metal sleeve 2 for fluid circulation. It can be seen from the figure that the left and right ends of the metal sleeve 2 are provided with a necking section 7, the heating tube 1 is connected in series in the metal sleeve so that the left and right ends of the heating tube extend out of the necking section, the metal sleeve and the internal heating tube are connected at both ends by argon arc welding or laser welding, etc., the metal sleeve 2 is provided with a water inlet 5 and a water outlet 6 respectively close to the left and right ends of the heating tube, the water inlet 5 is connected to the water inlet pipe 8, and the water outlet 6 is connected to the water outlet pipe 9, the water inlet pipe and the water outlet pipe are welded to the metal sleeve by nickel-based brazing or argon arc welding, laser welding, etc., and a plurality of semi-annular recesses 4 are provided on the metal sleeve 2, thereby making the outer surface of the metal sleeve have a concave-convex structure, and the cross-sectional shape of the semi-annular recess 4 is as follows: Figure 3As shown, each semi-annular recessed portion 4 is located between the water inlet and the water outlet. In this embodiment, the outer surface of the metal sleeve 2 has two groups of semi-annular recessed portions (such as Figure 5 As shown in the figure, six semi-annular recesses are provided on the upper side, and six semi-annular recesses are also provided on the lower side). Each group of semi-annular recesses has multiple semi-annular recesses uniformly arranged along the length direction of the metal sleeve. The semi-annular recesses of the two groups are staggered with each other. The two groups of semi-annular recesses uniformly arranged along the length direction of the metal sleeve are staggered with each other so that the flow channel forms a spiral flow channel as a water flow channel, that is, a flow space with a semi-annular cross-section is formed between adjacent semi-annular recesses to increase the flow distance of the fluid. During heating, water flows in from the water inlet at one end of the metal sleeve, and is divided into two paths when passing through the flow channel. The surface of the internal heating tube is quickly and fully heated, and hot water is obtained when it flows out from the water outlet at the other end of the metal sleeve.

[0019] Furthermore, each group of semi-annular recesses 4 is pressed onto the outer surface of the heating tube 1, that is, the inner wall of the semi-annular recess 4 of the metal sleeve 2 is completely in contact with the outer surface of the electric heating tube. On the one hand, it can prevent the water flow from moving in a straight line, so that the water flow can be heated more fully. On the other hand, it can support the electric heating tube. In addition, the metal sleeve 2 is a stainless steel tube.

[0020] During assembly, the outside of the heating tube is sheathed into the stainless steel tube, and the left and right ends of the heating tube and the stainless steel tube ( Figure 1 The two components (shown in the left and right directions) are welded together using methods such as argon arc welding and laser welding. After assembly, water flows through the inlet pipe and through the circulation space within the semi-circular cross-section (the water passage formed between two adjacent semi-circular recesses). This is fully heated by the internal heating tubes, causing the water to swirl, significantly increasing the distance it travels and thus providing more complete heating. After being heated, the water flows out of the outlet. Because it has been fully heated, the water temperature is raised to a higher level, achieving rapid heating. Adjusting the power and length of the heating tubes can achieve different heating effects.

Claims

1. A rapid heating water heater, comprising a heating tube (1), a metal sleeve (2) sleeved on the outer periphery of the heating tube, and a circulation channel (3) formed between the heating tube (1) and the metal sleeve (2) for circulating a fluid, wherein the metal sleeve (2) is provided with a plurality of staggered semi-annular recesses (4) so ​​that the circulation channel forms a spiral flow channel to increase the circulation distance of the fluid; the semi-annular recesses (4) include two groups, and are arranged on the outer surface of the metal sleeve (2) and arranged relative to each other along the center line of its cross section, and the two groups of the semi-annular recesses (4) are evenly staggered along the length direction of the metal sleeve to form the spiral flow channel; the metal sleeve (2) is provided with a water inlet (5) and a water outlet (6) respectively located at both ends of the heating tube, and each semi-annular recess (4) is located between the water inlet and the water outlet.

2. The rapid heating water heater according to claim 1, characterized in that: Each group of semi-annular recessed portions (4) is pressed onto the outer surface of the heating tube (1).

3. The rapid heating water heater according to claim 1 or 2, characterized in that: Neck sections (7) are provided at both ends of the metal sleeve (2), and both ends of the heating tube (1) extend outside the neck sections.

4. The rapid water heater according to claim 3, characterized in that: The metal sleeve (2) is a stainless steel tube.

5. The rapid water heater according to claim 1, characterized in that: The water inlet (5) is connected to a water inlet pipe (8), and the water outlet (6) is connected to a water outlet pipe (9).

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