Three-coil-pipe heat exchange and heat preservation water tank

Abstract

The utility model provides a three-coil-pipe heat exchange heat preservation water tank which comprises a water tank shell, a first inner container and a second inner container, the first inner container and the second inner container are arranged in the water tank shell, a first heating coil pipe is arranged in the first inner container, a second heating coil pipe is arranged in the second inner container, and heat exchange coil pipes are arranged in the first inner container and the second inner container. The water inlet end of the heat exchange coil pipe is arranged in the first heating coil pipe in a spiral structure, the water outlet end of the heat exchange coil pipe is arranged in the second heating coil pipe in a spiral structure, and the double-inner-container structure (the first inner container and the second inner container) is arranged, so that a cold water area and a hot water area can be effectively separated, and the contact area between the cold water area and the hot water area is reduced; therefore, the heat diffusion speed is reduced, the heat preservation effect is improved, and meanwhile, the heating efficiency and the water temperature can be improved through the three-coil heat exchange system (the first heating coil, the second heating coil and the heat exchange coil); each heating coil works independently, and proper heat can be provided in different areas, so that the temperature field of the whole water tank is more uniform.

Description

Technical Field

[0001] The utility model relates to the technical field of water tanks, in particular to a three-coil heat exchange and thermal insulation water tank. Background Art

[0002] At present, a heat exchange water tank generally consists of a shell and a heat exchange coil placed in the shell. The shell is fixedly connected with an inlet and outlet water pipe to achieve heat exchange between the heat exchange coil and the water flowing out of the shell. The heat exchange coil is located between the inlet pipe and the outlet pipe.

[0003] In the existing water exchange water tanks, most of them use single-stage single-layer coil heating, which is simple in process and low in cost. It is the mainstream structural mode of the existing water tanks. However, the heating water temperature of such single-stage single-layer coil heat exchange water tanks is generally not high, the temperature field in the water tank is uneven and it is difficult to achieve good feedback control, and there are generally problems such as insufficient water supply at one time; and most of the small household water tanks use single-liner water tanks, which occupy a large area. Since cold water and hot water are stored in the same water tank, according to the pressure bearing principle, the hot water is in the upper part of the water tank and the cold water is in the lower part of the water tank. There is a large contact area between the cold water and the hot water, and the heat always diffuses to the cold place. The greater the temperature difference between the cold water and the hot water, the faster and more the hot water heat diffuses, so the insulation effect is poor. In addition, the water in the cold water inlet pipe suddenly pours in a large amount, and the water in the cold water inlet pipe will form a water flow that rushes directly to the hot water above, causing the hot water at the outlet of the hot water outlet pipe in the shell to rapidly cool, causing the outlet water temperature to drop suddenly, and the user's experience is poor. Utility Model Content

[0004] The utility model aims to provide a three-coil heat exchange and insulation water tank, aiming to solve the problems that the existing single-stage single-layer coil heat exchange water tank of the existing heat exchange water tank has insufficient performance in heating water temperature, resulting in uneven temperature field inside the water tank, affecting the quality and stability of hot water; and the existing heat exchange water tank generally has the problem of insufficient one-time water supply; in the single-tank water tank design, cold water and hot water are stored in one water tank. When a large amount of water from the cold water inlet pipe flows in, it will directly impact the hot water area, causing the water temperature at the hot water outlet pipe to drop rapidly, affecting the stability of the outlet water temperature, and the heat diffusion phenomenon caused by the temperature difference makes the insulation effect of the hot water poor.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A three-coil heat-exchange insulation water tank is provided, comprising a water tank shell and a first inner tank and a second inner tank arranged in the water tank shell, the first inner tank is connected to the second inner tank, an insulation layer is filled between the first inner tank, the second inner tank and the water tank shell, a first heating coil is arranged in the first inner tank, a second heating coil is arranged in the second inner tank, heat exchange coils are penetrated inside the first inner tank and the second inner tank, a circulation device is arranged on the top of the water tank shell, a water outlet of the circulation device is communicated with a water inlet end of the heat exchange coil, a water inlet of the circulation device is communicated with a water outlet end of the heat exchange coil, the water inlet end of the heat exchange coil is spirally arranged on the inner side of the first heating coil, the water outlet end of the heat exchange coil is spirally arranged on the inner side of the second heating coil, and the heat exchange coil is located at the bottom of the second inner tank and extends toward the periphery to form a disc-shaped structure.

[0007] Preferably, a hot water outlet, a cold water inlet and a sewage outlet are respectively connected to one side of the water tank shell, the hot water outlet is connected to the first inner tank, the cold water inlet is connected to the second inner tank, the sewage outlet is connected to the bottom of the second inner tank, and the bottom of the second inner tank is an arc-shaped slope.

[0008] Preferably, the cold water inlet is connected to a one-way valve.

[0009] Preferably, the hot water outlet is located inside the first inner tank and is connected to a water outlet pipe, and the water outlet of the water outlet pipe is bent upward.

[0010] Preferably, the cold water inlet is located inside the second inner tank and is connected to a water inlet pipe, and the water inlet of the water inlet pipe is bent downward.

[0011] Preferably, one side of the water tank shell is provided with temperature detection blind tubes corresponding to the first inner tank and the second inner tank respectively.

[0012] Preferably, a negative pressure valve and an exhaust valve are connected to the top of the water tank shell, and both the negative pressure valve and the exhaust valve are connected to the first inner tank.

[0013] Preferably, a water inlet section is formed between the water inlet end of the heat exchange coil and the bottom end of the heat exchange coil, and a water outlet section is formed between the water outlet end of the heat exchange coil and the bottom end of the heat exchange coil, the water inlet section is located in the first inner tank and is provided with a first spiral coil, the first spiral coil is arranged on the inner side of the first heating coil, the water outlet section is located in the second inner tank and is provided with a second spiral coil, and the second spiral coil is arranged on the inner side of the second heating coil.

[0014] Preferably, the bottom of the heat exchange coil is a wavy annular structure.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] The utility model provides a three-coil heat exchange and insulation water tank, which can effectively separate the cold water and hot water areas by setting a double inner tank structure (first inner tank and second inner tank), reduce the contact area between them, thereby reducing the heat diffusion rate and improving the insulation effect. At the same time, the double inner tank design also helps to reduce the floor space; the use of a three-coil heat exchange system (first heating coil, second heating coil and heat exchange coil) can improve the heating efficiency and water temperature; each heating coil works independently and can provide appropriate heat in different areas, so that the temperature field of the entire water tank is more uniform; the heat exchange coil located at the bottom of the second inner tank extends to the periphery to form a disc-shaped structure, which helps to collect and transfer heat more effectively, and also enhances the stability and durability of the structure; due to the improvement of the uniformity of the temperature field and the insulation effect, the user experience is improved, the outlet water temperature is more stable, and the problem of rapid cooling caused by cold water shock in the prior art is avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 It is a structural schematic diagram of the utility model;

[0019] Figure 2 It is a top view of the utility model.

[0020] In the figure: 1. water tank shell; 2. first inner tank; 3. second inner tank; 4. insulation layer; 5. first heating coil; 6. second heating coil; 7. heat exchange coil; 8. circulation device; 9. hot water outlet; 10. cold water inlet; 11. sewage outlet; 12. one-way valve; 13. outlet pipe; 14. inlet pipe; 15. temperature detection blind pipe; 16. negative pressure valve; 17. exhaust valve; 18. first spiral coil; 19. second spiral coil; 20. wavy ring structure; 21. water inlet section; 22. water outlet section. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and 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 orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0023] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0024] Combine the following Figure 1 to Figure 2 The utility model describes a three-coil heat exchange and thermal insulation water tank.

[0025] like Figure 1 to Figure 2As shown, the utility model provides a three-coil heat exchange and insulation water tank, comprising a water tank shell 1 and a first inner tank 2 and a second inner tank 3 arranged in the water tank shell 1, the first inner tank 2 is connected to the second inner tank 3, and an insulation layer 4 is filled between the first inner tank 2 and the second inner tank 3 and the water tank shell 1. By setting a double inner tank structure (the first inner tank 2 and the second inner tank 3), the cold water and hot water areas can be effectively separated, and the contact area between them can be reduced, thereby reducing the heat diffusion speed and improving the insulation effect. The first inner tank 2 is provided with a first heating coil 5, The first heating coil 5 is used to maintain the temperature of the water in the first inner tank. The second inner tank 3 is provided with a second heating coil 6, which heats the water entering the second inner cavity. The first inner tank 2 and the second inner tank 3 are provided with a heat exchange coil 7. The three-coil heat exchange system (the first heating coil 5, the second heating coil 6 and the heat exchange coil 7) can improve the heating efficiency and water temperature. Each heating coil works independently and can provide appropriate heat in different areas, so that the temperature field of the entire water tank is more uniform. The top of the water tank shell 1 is provided with a circulation The water outlet of the circulation device 8 is connected to the water inlet end of the heat exchange coil 7, and the water inlet of the circulation device 8 is connected to the water outlet end of the heat exchange coil 7. The water inlet end of the heat exchange coil 7 is arranged on the inner side of the first heating coil 5 in a spiral structure. Since one end of the water inlet of the heat exchange coil 7 is arranged on the inner side of the first heating coil 5 in a spiral structure, the heat of the water in the first heating coil 5 and the first inner tank can be effectively absorbed, and then the heat is diffused through the disc-shaped coil at the bottom of the heat exchange coil 7 to preheat the cold water at the water inlet. The water outlet end of the heat exchange coil 7 is a spiral structure. It is arranged on the inner side of the second heating coil 6, and the liquid that loses heat in the heat exchange coil 7 is heated again by the second heating coil 6 or reduces the heat loss. When the heat exchange coil 7 returns to the first inner tank, it can prevent the water in the first inner tank from excessively reducing the heat due to the liquid in the heat exchange coil 7. The heat exchange coil 7 is located at the bottom of the second inner tank 3 and extends toward the periphery to form a disc-shaped structure. The heat exchange coil 7 located at the bottom of the second inner tank 3 extends toward the periphery to form a disc-shaped structure, which helps to collect and transfer heat more effectively, and also enhances the stability and durability of the structure.

[0026] Preferably, a hot water outlet 9, a cold water inlet 10 and a drain outlet 11 are connected to one side of the water tank shell 1, respectively. The hot water outlet 9 is connected to the first inner tank 2, and the cold water inlet 10 is connected to the second inner tank 3. The separated hot water outlet 9 and cold water inlet 10 are connected to the first inner tank 2 and the second inner tank 3, respectively, to optimize the stratification and thermal insulation performance of the water temperature. Hot water is extracted in the first inner tank 2, while cold water enters the second inner tank 3, which helps to maintain the temperature difference of the water in the two tanks and reduce the temperature loss caused by mixing. The drain outlet 11 is connected to the bottom of the second inner tank 3, and the drain outlet 11 is connected to the bottom of the second inner tank 3, which is convenient for discharging impurities or sediments deposited at the bottom of the water tank. The bottom of the second inner tank 3 is an arc slope. The arc slope designed at the bottom of the second inner tank 3 is conducive to guiding the sediment to slide toward the drain outlet 11, making the sewage discharge more thorough.

[0027] Preferably, the cold water inlet 10 is connected to a one-way valve 12, which only allows water to flow into the second inner tank 3 from the cold water inlet 10 but does not allow water to flow in the opposite direction, thereby effectively preventing the water in the second inner tank 3 from flowing back out of the cold water inlet 10 after the external pipe of the cold water inlet 10 is disassembled.

[0028] Preferably, the hot water outlet 9 is located inside the first inner tank 2 and is connected to a water outlet pipe 13. The water outlet of the water outlet pipe 13 is curved upward. Since the density of hot water is less than that of cold water, it naturally tends to the upper part of the water tank. Disposing the hot water outlet 9 inside the first inner tank 2 is conducive to maintaining the stratification of hot water and cold water, reducing the mixing of the two, thereby improving the thermal insulation performance; when the water flow in the water outlet pipe 13 is suddenly closed, the upward curved water outlet can slow down the water hammer phenomenon (water hammer) caused by the conversion of kinetic energy of water into pressure energy, thereby protecting the pipeline from damage.

[0029] Preferably, the cold water inlet 10 is located inside the second inner tank 3 and is connected to a water inlet pipe 14. The water inlet of the water inlet pipe 14 is bent downward. Since cold water has a greater density than hot water, it naturally tends to the bottom of the water tank. The water inlet of the water inlet pipe 14 is bent downward to guide the cold water to the bottom of the second inner tank 3, which helps to maintain a good water temperature stratification and avoid rapid mixing of cold and hot water, thereby improving the insulation effect; the water inlet that is bent downward slows down the impact of the water flow, thereby reducing the direct impact on the hot water area of ​​the second inner tank 3, and avoiding the temperature fluctuation and heat energy loss caused by it.

[0030] Preferably, a temperature detection blind tube 15 is provided on one side of the water tank shell 1 corresponding to the first inner tank 2 and the second inner tank 3 respectively. By detecting the temperatures of the first inner tank 2 (hot water area) and the second inner tank 3 (cold water area) respectively, more precise temperature control can be achieved; accurate temperature monitoring helps to avoid overheating or insufficient heating, save energy consumption, and improve overall heating efficiency.

[0031] Preferably, a negative pressure valve 16 and an exhaust valve 17 are connected to the top of the water tank shell 1, and both the negative pressure valve 16 and the exhaust valve 17 are connected to the first inner tank 2. The function of the exhaust valve 17 is to automatically open when the internal pressure of the system exceeds a set value to release excess pressure, thereby preventing the inner tank from being damaged or causing a safety accident due to excessive pressure; the function of the exhaust valve 17 is to automatically open when the internal pressure of the inner tank exceeds a set value to release excess pressure, thereby preventing the inner tank from being damaged or causing a safety accident due to excessive pressure.

[0032] Preferably, a water inlet section 21 is formed between the water inlet end of the heat exchange coil 7 and the bottom end of the heat exchange coil 7, and a water outlet section 22 is formed between the water outlet end of the heat exchange coil 7 and the bottom end of the heat exchange coil 7. The water inlet section 21 is located in the first inner tank and is provided with a first spiral coil 18, and the first spiral coil 18 is arranged on the inner side of the first heating coil 5. The water outlet section 22 is located in the second inner tank 3 and is provided with a second spiral coil 19, and the second spiral coil 19 is arranged on the inner side of the second heating coil 6.

[0033] Preferably, the bottom of the heat exchange coil 7 is in a wavy annular structure, which increases the surface area of ​​the coil in contact with water, improves the heat exchange efficiency, and enables heat to be transferred from the coil to the water more quickly and effectively.

[0034] The utility model provides a three-coil heat exchange and insulation water tank, which can effectively separate the cold water and hot water areas by setting a double inner tank structure (the first inner tank 2 and the second inner tank 3), reduce the contact area between them, thereby reducing the heat diffusion rate and improving the insulation effect. At the same time, the double inner tank design also helps to reduce the floor space; the use of a three-coil heat exchange system (the first heating coil 5, the second heating coil 6 and the heat exchange coil 7) can improve the heating efficiency and water temperature; each heating coil works independently and can provide appropriate heat in different areas, so that the temperature field of the entire water tank is more uniform; the heat exchange coil 7 located at the bottom of the second inner tank 3 extends to the periphery to form a disc-shaped structure, which helps to collect and transfer heat more effectively, and also enhances the stability and durability of the structure; due to the improvement of the uniformity of the temperature field and the insulation effect, the user's experience is improved, the outlet water temperature is more stable, and the problem of rapid cooling caused by cold water shock in the prior art is avoided.

[0035] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A three-coil heat exchange and insulation water tank, comprising a water tank shell and a first inner tank and a second inner tank arranged in the water tank shell, wherein the first inner tank is connected to the second inner tank, and an insulation layer is filled between the first inner tank, the second inner tank and the water tank shell, characterized in that: A first heating coil is arranged in the first inner tank, and a second heating coil is arranged in the second inner tank. Heat exchange coils are penetrated inside the first inner tank and the second inner tank. A circulation device is arranged on the top of the water tank shell. The water outlet of the circulation device is communicated with the water inlet end of the heat exchange coil, and the water inlet of the circulation device is communicated with the water outlet end of the heat exchange coil. The water inlet end of the heat exchange coil is arranged on the inner side of the first heating coil in a spiral structure, and the water outlet end of the heat exchange coil is arranged on the inner side of the second heating coil in a spiral structure. The heat exchange coil is located at the bottom of the second inner tank and extends toward the periphery to form a disc-shaped structure.

2. A three-coil heat exchange and insulation water tank according to claim 1, characterized in that: A hot water outlet, a cold water inlet and a sewage outlet are respectively connected to one side of the water tank shell. The hot water outlet is connected to the first inner tank, the cold water inlet is connected to the second inner tank, and the sewage outlet is connected to the bottom of the second inner tank. The bottom of the second inner tank is an arc-shaped slope.

3. A three-coil heat exchange and insulation water tank according to claim 2, characterized in that: The cold water inlet is connected with a one-way valve.

4. A three-coil heat exchange and insulation water tank according to claim 2, characterized in that: The hot water outlet is located inside the first inner tank and is connected to a water outlet pipe, and the water outlet of the water outlet pipe is bent upward.

5. The three-coil heat exchange and insulation water tank according to claim 2, characterized in that: The cold water inlet is located inside the second inner tank and is connected to a water inlet pipe, and the water inlet of the water inlet pipe is bent downward.

6. A three-coil heat exchange and insulation water tank according to claim 1, characterized in that: One side of the water tank shell is provided with temperature detection blind tubes corresponding to the first inner tank and the second inner tank respectively.

7. The three-coil heat exchange and insulation water tank according to claim 1, characterized in that: A negative pressure valve and an exhaust valve are connected to the top of the water tank shell, and both the negative pressure valve and the exhaust valve are connected to the first inner tank.

8. The three-coil heat exchange and insulation water tank according to claim 1, characterized in that: A water inlet section is formed between the water inlet end of the heat exchange coil and the bottom end of the heat exchange coil, and a water outlet section is formed between the water outlet end of the heat exchange coil and the bottom end of the heat exchange coil. The water inlet section is located in the first inner tank and is provided with a first spiral coil, and the first spiral coil is arranged on the inner side of the first heating coil. The water outlet section is located in the second inner tank and is provided with a second spiral coil, and the second spiral coil is arranged on the inner side of the second heating coil.

9. The three-coil heat exchange and insulation water tank according to claim 1, characterized in that: The bottom of the heat exchange coil is in a wavy annular structure.

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