An energy regulation and recovery type high-efficiency water heater

Abstract

The present invention provides an energy-regulating and recycling high-efficiency water heater, comprising: an inner tank, a hot water outlet pipe and a cold water inlet pipe. A water-dispersing heat-exchanging slow-flow box communicated with the inner tank is arranged inside the inner tank. The hot water outlet pipe extends into the inner tank and is at least partially arranged inside the water-dispersing heat-exchanging slow-flow box. The cold water inlet pipe is communicated with the water-dispersing heat-exchanging slow-flow box. Cold water enters the water-dispersing heat-exchanging slow-flow box through the cold water inlet pipe and exchanges heat with the hot water inside the hot water outlet pipe in the water-dispersing heat-exchanging slow-flow box. The present invention uses the water-dispersing heat-exchanging slow-flow box, the cold water inlet pipe and the hot water outlet pipe to form a convection heat exchanger, and uses the surplus heat of the hot water at a higher temperature in the hot water outlet pipe to heat the cold water in the water-dispersing heat-exchanging slow-flow box, so that while reducing the output hot water of the water heater within a safe range, the temperature of the cold water inlet is increased, the heating efficiency is improved, the hot water output is increased, a heat cycle transfer is formed inside the water heater, and the maximum utilization of energy is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of water heaters, and more particularly to an energy-adjusting and recycling high-efficiency water heater. Background Art

[0002] Currently, electric water heaters mainly include storage electric water heaters and emerging instant-heating volumetric water heaters. Their common feature is that they have a water-containing inner tank. By preheating the water in the inner tank, when in use, cold water enters the water heater and pushes out the hot water in the inner tank, and the hot water is mixed with the cold water outside the water heater to form warm water for use. When the temperature of the cold water entering the inner tank drops to a certain temperature, the electric heating tube inside the water heater starts to heat. Due to the influence of the installation environment circuit, the power of the storage electric water heater is generally 3.2 kW or less, and that of the instant-heating volumetric water heater is generally 5.2 kW or less. The heating speed is difficult to heat the cold water into warm water in a timely manner. Therefore, only the high-temperature water preheated in the inner tank is used as the main body to mix with cold water to form the warm water for use. The temperature of the water in the inner tank of the water heater seriously affects the temperature of the mixed warm water and the amount of warm water that can be output. And due to the volume limitation, the output amount of the mixed warm water of the storage electric water heater and the instant-heating volumetric water heater often cannot meet the usage requirements.

[0003] Moreover, due to safety factors, the technical standard of the water heater restricts the maximum outlet water temperature. As a result, the maximum outlet water temperature of the current water heaters on the market cannot be set too high, usually set at 75 °C, that is, the heating power is restricted. However, since the existing water heater structure still adopts the method of directly discharging the high-temperature water at the top of the water heater and mixing it with cold water, for example, when the high-temperature water inside the water heater exceeds 85 °C, even if it is mixed with the external cold water, the resulting warm water is still super-warm water that does not meet the requirements, and there is a risk of scalding and it cannot meet the user's needs.

[0004] There is a Chinese utility model patent with the application number 2021205801228, which discloses a water heater structure based on double-zone heat exchange and a device having the same. The heat exchange block communicated with the cold water pipeline is used to divide the inner tank of the water heater into a heat exchange area and a heat storage area. The cold water in the heat exchange area is heated by an external heat medium pipeline, and the heat storage area is heated by the heat medium pipeline in the heat exchange area. Although the hot water outlet efficiency is improved, it mainly uses the external heat medium pipeline to heat the heat exchange area, with a complex structure, requiring additional external energy, low thermal energy utilization rate, a small increase in the hot water output, and its safety is also difficult to guarantee. Summary of the Invention

[0005] The present invention aims to solve at least one of the technical problems in the prior art, such as insufficient warm water output, low thermal energy utilization rate, and certain safety hazards due to the relatively high hot water outlet temperature.

[0006] To this end, the present invention provides an energy-adjusting and recycling high-efficiency water heater.

[0007] The present invention provides an energy - regulating and recycling high - efficiency water heater, comprising: an inner tank, a hot - water outlet pipe, and a cold - water inlet pipe. A water - dispersing heat - exchange slow - flow box communicated with the inner tank is arranged inside the inner tank. The hot - water outlet pipe extends into the inner tank and is at least partially arranged inside the water - dispersing heat - exchange slow - flow box. The cold - water inlet pipe is communicated with the water - dispersing heat - exchange slow - flow box. Cold water enters the water - dispersing heat - exchange slow - flow box through the cold - water inlet pipe and exchanges heat with the hot water inside the hot - water outlet pipe in the water - dispersing heat - exchange slow - flow box.

[0008] For the energy - regulating and recycling high - efficiency water heater proposed by the present invention, the inner tank is used to store hot water. The cold - water inlet is connected to cold water, and the hot - water outlet pipe is used to output the hot water inside the inner tank. The water - dispersing heat - exchange slow - flow box is arranged in the inner tank. The hot - water outlet pipe passes through the water - dispersing heat - exchange slow - flow box and is communicated with the inner tank. The cold - water inlet pipe is communicated with the water - dispersing heat - exchange slow - flow box. After the cold water enters the water - dispersing heat - exchange slow - flow box through the cold - water inlet pipe, under the action of water pressure, the cold water spreads out in the water - dispersing heat - exchange slow - flow box and fully contacts the part of the hot - water outlet pipe located inside the water - dispersing heat - exchange slow - flow box, and conducts forced heat exchange with the hot water in the hot - water outlet pipe. Part of the heat of the hot water in the hot - water outlet pipe is transferred to the cold water in the water - dispersing heat - exchange slow - flow box, increasing the temperature of the cold water. Then the cold water flows into the inner tank through the water - dispersing heat - exchange slow - flow box. At this time, the water heater heats the relatively warmer cold - water inlet, reducing the heating time and increasing the temperature of the hot water in the inner tank. At the same time, the temperature of the high - temperature hot water in the hot - water outlet pipe also decreases accordingly, avoiding over - heating of the hot - water outlet. Using the excess heat of the hot water in the hot - water outlet pipe to heat the cold - water inlet forms a cyclic conduction of heat, improving the thermal energy utilization rate and increasing the output of warm and hot water of the water heater.

[0009] According to the above - mentioned technical solution of the present invention, an energy - regulating and recycling high - efficiency water heater may also have the following additional technical features:

[0010] In the above - mentioned technical solution, a relatively air - tight space is formed inside the water - dispersing heat - exchange slow - flow box. After the cold water enters the relatively air - tight space through the cold - water inlet pipe, it exchanges heat with the hot water inside the hot - water outlet pipe under the restriction of the water - dispersing heat - exchange slow - flow box.

[0011] In this technical solution, a relatively air - tight space is formed inside the water - dispersing heat - exchange slow - flow box. The forced heat exchange between the cold - water inlet pipe and the hot - water outlet pipe mainly occurs inside the relatively air - tight space. Due to the restriction of the relatively air - tight space, the cold - water inlet is filled with water under the action of pressure inside the relatively air - tight space and fully contacts the hot - water outlet pipe, making the water - dispersing heat - exchange slow - flow box form a convection heat exchanger.

[0012] In the above - mentioned technical solution, the output end of the hot - water outlet pipe and the input end of the cold - water inlet pipe are arranged on the same side of the inner tank, and the water - dispersing heat - exchange slow - flow box is arranged on one side of the inner tank close to the output end of the hot - water outlet pipe.

[0013] In this technical solution, the output end of the hot water outlet pipe and the input end of the cold water inlet pipe are both arranged at the bottom of the inner tank. The water-dispersing heat-exchanging slow-flow box is arranged at the lower end of the inner tank, so that the cold water exchanges heat with the hot water near the output position at the moment near the input position, minimizing the influence of the unexchanged cold water on the water temperature inside the inner tank, and ensuring that the hot water is output outside the inner tank immediately after exchanging heat with the cold water, thus ensuring the effectiveness of reducing the hot water outlet temperature.

[0014] In the above technical solution, the hot water outlet pipe includes a diversion section, a heat-exchanging section, and an output section connected in sequence. A hot water outlet is provided at the end of the output section. The heat-exchanging section is arranged inside the water-dispersing heat-exchanging slow-flow box. The diversion section extends towards the other end of the inner tank opposite to the position where the water-dispersing heat-exchanging slow-flow box is arranged, and a hot water inlet is provided at the end of the diversion section.

[0015] In this technical solution, the diversion section is used to keep the hot water inlet away from the water-dispersing heat-exchanging slow-flow box. Specifically, the diversion section extends upwards towards the upper end of the inner tank. That is, when the water-dispersing heat-exchanging slow-flow box is arranged on the lower side of the inner tank, the hot water inlet is arranged on the upper side of the inner tank. The hot water inside the inner tank enters the diversion section through the hot water inlet, flows towards the heat-exchanging section, exchanges heat with the cold water in the water-dispersing heat-exchanging slow-flow box in the heat-exchanging section, then flows towards the output section, and is discharged from the inner tank through the output section.

[0016] In any of the above technical solutions, a water-dispersing area is provided on the side of the water-dispersing heat-exchanging slow-flow box close to the cold water inlet pipe. The water-dispersing area is used to connect the water-dispersing heat-exchanging slow-flow box with the inner tank and input the cold water that has been heat-exchanged in the water-dispersing heat-exchanging slow-flow box into the inner tank.

[0017] In this technical solution, the water-dispersing area can be arranged at the bottom of the water-dispersing heat-exchanging slow-flow box and / or the lower side of the side wall of the water-dispersing heat-exchanging slow-flow box. The cold water flows towards the top of the water-dispersing heat-exchanging slow-flow box under the action of pressure and flows reversely under the constraint of the top. During the flow, it passes through the hot water outlet pipe twice, completes heat exchange and then reaches the water-dispersing area and enters the inner tank. The cold water inside the water-dispersing heat-exchanging slow-flow box is discharged horizontally or downwards, which can ensure the heat exchange efficiency and also inhibit the formation of turbulence.

[0018] In the above technical solution, a number of water-dispersing holes are provided in the water-dispersing area. The number of the water-dispersing holes is arranged along the circumferential and / or radial direction of the water-dispersing heat-exchanging slow-flow box, and the diameters of the number of the water-dispersing holes show a decreasing trend in the direction close to the cold water inlet pipe.

[0019] In this technical solution, the water-dispersing area can be provided with an annular through-hole or a number of water-dispersing holes. The number of the water-dispersing holes is arranged along the circumferential and / or radial direction of the water-dispersing heat-exchanging slow-flow box, so that the cold water flowing from the water-dispersing heat-exchanging slow-flow box into the inner tank forms a laminar flow, inhibiting the formation of turbulence.

[0020] In any of the above technical solutions, according to the specified range of the temperature drop of the hot water outlet, design the pipe surface area of the hot water outlet pipe in the water-dispersing heat exchange slow-flow box.

[0021] In this technical solution, the range of the temperature drop of the hot water outlet can be set between 5°C and 15°C. For example, when the hot water in the inner tank is at the highest temperature of 75°C, the temperature of the hot water in the hot water outlet pipe after heat exchange should be at least 5°C lower than the highest temperature, but should be higher than 60°C; when the hot water in the inner tank is at the highest temperature of 90°C, the temperature of the hot water in the hot water outlet pipe after heat exchange should be around 80°C; when the temperature of the hot water in the inner tank is lower than 45°C, the temperature of the hot water in the hot water outlet pipe after heat exchange should be higher than 40°C; even if the temperature of the hot water outlet is reduced to a suitable range, while ensuring safety, it also ensures a sufficient temperature for mixing with the external cold water; since the heat transfer coefficient and the temperature of the cold water inlet are fixed values, the pipe surface area of the hot water outlet pipe in the water-dispersing heat exchange slow-flow box can be controlled, that is, the heat exchange area can be controlled to ensure that the temperature is reduced within a reasonable range.

[0022] In the above technical solution, the method for designing the pipe surface area of the hot water outlet pipe in the water-dispersing heat exchange slow-flow box is as follows:

[0023] According to the range of the temperature drop of the hot water outlet, calculate the numerical range of the heat energy that should be exchanged between the hot water and the cold water in the hot water outlet pipe;

[0024] According to the magnitude of the heat energy that should be exchanged, calculate the numerical range of the pipe surface area of the hot water outlet pipe in the water-dispersing heat exchange slow-flow box.

[0025] In this technical solution, when the range of the temperature drop of the hot water outlet is between 5°C and 15°C, taking a temperature change of 5°C as the lower limit of the heat energy that should be exchanged between the hot water and the cold water in the hot water outlet pipe, and a temperature change of 15°C as the upper limit of the heat energy that should be exchanged between the hot water and the cold water in the hot water outlet pipe, then the heat energy that should be exchanged between the hot water and the cold water in the hot water outlet pipe can be calculated by the following formula:

[0026] Q = CM(t2 - t1);

[0027] Wherein, C is the mass of the hot water in the heat exchange section of the hot water outlet pipe, M is the specific heat of the object, t2 is the temperature of the hot water in the hot water outlet pipe before heat exchange, and t1 is the temperature of the hot water in the outlet pipe after heat exchange.

[0028] After obtaining the numerical range of the heat energy that should be exchanged between the hot water and the cold water in the hot water outlet pipe, the numerical range of the pipe surface area of the hot water outlet pipe in the water-dispersing heat exchange slow-flow box can be calculated according to the following formula:

[0029] Q = KS(T2 - T1);

[0030] Among them, K is the heat transfer coefficient, S is the pipe surface area of the hot water outlet pipe in the water-dispersing heat exchange slow-flow box, T2 is the temperature of the hot water in the hot water outlet pipe before heat exchange, and T1 is the temperature of the cold water inlet before heat exchange.

[0031] According to the calculation results, select the appropriate pipe surface area of the hot water outlet pipe in the water-dispersing heat exchange slow-flow box.

[0032] In the above calculation method, during the calculation, usually the highest hot water temperature of the water heater is used for the calculation. After determining the surface area of the heat exchange section, when the temperature of the hot water in the hot water outlet pipe before heat exchange drops to a lower temperature, the heat exchange area and the heat transfer coefficient remain unchanged. Due to the decrease in the temperature difference between the cold water inlet and the hot water, the heat transfer amount between the two also decreases synchronously. Therefore, even when the hot water temperature in the inner tank is relatively low, the hot water outlet will not cause the outlet water temperature to drop sharply under the influence of the water-dispersing heat exchange slow-flow box, suppressing the fluctuation of the outlet water temperature and ensuring the stable temperature performance of the hot water output of the water heater.

[0033] In any of the above technical solutions, the pipe of the hot water outlet pipe provided in the water-dispersing heat exchange slow-flow box is a coil structure.

[0034] In this technical solution, the heat exchange section is a coil structure. Through the coil structure, the cold water in the water-dispersing heat exchange slow-flow box is in full contact with the hot water outlet pipe, and it is convenient to adjust the pipe area of the heat exchange section. Preferably, the coil of the heat exchange section is preferably 1-2 turns.

[0035] In any of the above technical solutions, it further includes an electric heating tube, and the water-dispersing heat exchange slow-flow box is fixedly connected to the electric heating tube and / or the inner tank.

[0036] In this technical solution, the electric heating tube is used to heat the water in the inner tank. Since the heat exchange capacity of the water-dispersing heat exchange slow-flow box increases with the increase of the temperature difference, it suppresses the output of ultra-high temperature hot water. When there is cold water inlet, the electric heating tube can be started to heat immediately, increasing the heating time during the whole use process and improving the warm water output of the whole water heater; and it can also increase the highest temperature that the hot water in the inner tank of the water heater can reach, such as setting it to 90°C. However, to ensure the service life of the water heater, 90°C can be set as the maximum heating mode. When the maximum mode is started until it is heated to 90°C, it will automatically and forcibly exit to the normal heating mode of 75°C until the maximum heating mode is restarted manually.

[0037] Specifically, the maximum heating mode is set manually and no more than 3 times every 24 hours.

[0038] In summary, due to the adoption of the above technical features, the beneficial effects of the present invention are:

[0039] The present invention utilizes a water-dispersing heat exchange slow-flow box, a cold water inlet pipe, and a hot water outlet pipe to form a convection heat exchanger. The excess heat of the relatively high-temperature hot water in the hot water outlet pipe is used to heat the cold water in the water-dispersing heat exchange slow-flow box, reducing the output hot water of the water heater within a safe range while increasing the temperature of the cold water inlet, improving the heating efficiency, increasing the hot water output, forming a heat cycle transfer inside the water heater, and maximizing energy utilization. At the same time, the maximum temperature that the water heater can reach is increased, that is, the power that the heating device of the water heater can output is increased, further increasing the warm and hot water output.

[0040] The additional aspects and advantages of the present invention will become apparent in the following description section or be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The above and / or additional aspects and advantages of the present invention will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, wherein:

[0042] Figure 1 is a structural diagram of an energy-regulating and recycling high-efficiency water heater according to an embodiment of the present invention;

[0043] Figure 2 is a schematic diagram of an energy-regulating and recycling high-efficiency water heater according to an embodiment of the present invention.

[0044] Wherein, Figures 1 to 2 The corresponding relationship between the reference numerals and the component names in the drawings is as follows:

[0045] 1, inner tank; 2, hot water outlet pipe; 3, cold water inlet pipe; 4, water-dispersing heat exchange slow-flow box; 5, electric heating tube;

[0046] 21, diversion section; 22, heat exchange section; 23, output section;

[0047] 211, hot water inlet; 231, hot water outlet;

[0048] 41, water-dispersing area;

[0049] 411, water-dispersing holes. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0050] In order to more clearly understand the above objects, features, and advantages of the present invention, the present invention will be further described in detail below in conjunction with the drawings and specific embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0051] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, the present invention may be practiced in other ways than those described herein, and thus, the scope of the present invention is not limited by the specific embodiments disclosed below.

[0052] The following refers to Figures 1 to 2 to describe an energy - regulating and recycling high - efficiency water heater provided according to some embodiments of the present invention.

[0053] Some embodiments of the present application provide an energy - regulating and recycling high - efficiency water heater.

[0054] As Figures 1 to 2 shown, the first embodiment of the present invention proposes an energy - regulating and recycling high - efficiency water heater, including: an inner tank 1, a hot - water outlet pipe 2, and a cold - water inlet pipe 3. A water - dispersing heat - exchange slow - flow box 4 is arranged inside the inner tank 1 and is in communication with it. The hot - water outlet pipe 2 extends into the inner tank 1 and is at least partially arranged inside the water - dispersing heat - exchange slow - flow box 4. The cold - water inlet pipe 3 is in communication with the water - dispersing heat - exchange slow - flow box 4. Cold water enters the water - dispersing heat - exchange slow - flow box 4 through the cold - water inlet pipe 3 and exchanges heat with the hot water inside the hot - water outlet pipe 2 in the water - dispersing heat - exchange slow - flow box 4.

[0055] For the energy - regulating and recycling high - efficiency water heater proposed in this embodiment, the inner tank 1 is used to store hot water, the cold - water inlet is connected to cold water, and the hot - water outlet pipe 2 is used to output the hot water inside the inner tank 1. The water - dispersing heat - exchange slow - flow box 4 is arranged in the inner tank 1. The hot - water outlet pipe 2 passes through the water - dispersing heat - exchange slow - flow box 4 and is in communication with the inner tank 1. The cold - water inlet pipe 3 is in communication with the water - dispersing heat - exchange slow - flow box 4. After the cold water enters the water - dispersing heat - exchange slow - flow box 4 through the cold - water inlet pipe 3, under the action of water pressure, the cold water spreads out in the water - dispersing heat - exchange slow - flow box 4 and makes full contact with the part of the hot - water outlet pipe 2 located inside the water - dispersing heat - exchange slow - flow box 4, and conducts forced heat exchange with the hot water in the hot - water outlet pipe 2. Part of the heat of the hot water in the hot - water outlet pipe 2 is transferred to the cold water in the water - dispersing heat - exchange slow - flow box 4, increasing the temperature of the cold water. Then the cold water flows into the inner tank 1 via the water - dispersing heat - exchange slow - flow box 4. At this time, the water heater heats the relatively warmer cold - water inlet, reducing the heating time and increasing the temperature of the hot water in the inner tank 1. At the same time, the temperature of the high - temperature hot water in the hot - water outlet pipe 2 also decreases accordingly, avoiding over - heating of the hot - water outlet. Utilizing the excess heat of the hot water in the hot - water outlet pipe 2 to heat the cold - water inlet forms a cyclic conduction of heat, improving the thermal energy utilization rate and increasing the output of warm and hot water of the water heater.

[0056] The second embodiment of the present invention proposes an energy - regulating and recycling high - efficiency water heater, and on the basis of the first embodiment, as Figures 1 to 2As shown, a relatively sealed space is formed inside the water-dispersing heat-exchanging slow-flow box 4. After the cold water enters the relatively sealed space through the cold water inlet pipe 3, it exchanges heat with the hot water inside the hot water outlet pipe 2 under the restriction of the water-dispersing heat-exchanging slow-flow box 4.

[0057] In this embodiment, a relatively sealed space is formed inside the water-dispersing heat-exchanging slow-flow box 4. The forced heat exchange between the cold water inlet pipe 3 and the hot water outlet pipe 2 mainly occurs inside the relatively sealed space. Due to the restriction of the relatively sealed space, the cold water inlet fills the relatively sealed space under the action of pressure, making full contact with the hot water outlet pipe 2, and enabling the water-dispersing heat-exchanging slow-flow box 4 to form a convection heat exchanger.

[0058] The third embodiment of the present invention proposes an energy-regulating and recycling high-efficiency water heater. Based on any of the above embodiments, as Figures 1 to 2 shown, the output end of the hot water outlet pipe 2 and the input end of the cold water inlet pipe 3 are arranged on the same side of the inner tank 1, and the water-dispersing heat-exchanging slow-flow box 4 is arranged on one side of the inner tank 1 close to the output end of the hot water outlet pipe 2.

[0059] In this embodiment, the output end of the hot water outlet pipe 2 and the input end of the cold water inlet pipe 3 are both arranged at the bottom of the inner tank 1, and the water-dispersing heat-exchanging slow-flow box 4 is arranged at the lower end of the inner tank 1, enabling the cold water to exchange heat with the hot water near the output position at the moment near the input position, minimizing the influence of the unexchanged cold water on the water temperature inside the inner tank 1, and ensuring that the hot water is output outside the inner tank 1 immediately after exchanging heat with the cold water, guaranteeing the effectiveness of the reduction in the hot water outlet temperature.

[0060] The fourth embodiment of the present invention proposes an energy-regulating and recycling high-efficiency water heater. Based on any of the above embodiments, as Figures 1 to 2 shown, the hot water outlet pipe 2 includes a diversion section 21, a heat-exchanging section 22, and an output section 23 connected in sequence. A hot water outlet 231 is provided at the end of the output section 23. The heat-exchanging section 22 is arranged inside the water-dispersing heat-exchanging slow-flow box 4. The diversion section 21 extends towards the other end of the inner tank 1 opposite to the position where the water-dispersing heat-exchanging slow-flow box 4 is arranged. A hot water inlet 211 is provided at the end of the diversion section 21.

[0061] In this embodiment, the diversion section 21 is used to keep the hot water inlet 211 away from the water-dispersing heat-exchanging slow-flow box 4. Specifically, the diversion section 21 extends upwards inside the inner tank 1. That is, when the water-dispersing heat-exchanging slow-flow box 4 is arranged on the lower side of the inner tank 1, the hot water inlet 211 is arranged on the upper side of the inner tank 1. The hot water inside the inner tank 1 enters the diversion section 21 through the hot water inlet 211, flows towards the heat-exchanging section 22, exchanges heat with the cold water inside the water-dispersing heat-exchanging slow-flow box 4 in the heat-exchanging section 22, then flows towards the output section 23, is discharged from the inner tank 1 through the output section 23, and is discharged through the hot water outlet 231.

[0062] The fifth embodiment of the present invention proposes an energy-regulating and recycling high-efficiency water heater, and on the basis of any of the above embodiments, as Figures 1 to 2 shown, a water-dispersing heat-exchanging slow-flow box 4 is provided with a water-dispersing area 41 on one side close to the cold water inlet pipe 3. The water-dispersing area 41 is used to connect the water-dispersing heat-exchanging slow-flow box 4 with the inner tank 1 and input the cold water after heat exchange in the water-dispersing heat-exchanging slow-flow box 4 into the inner tank 1.

[0063] In this embodiment, the water-dispersing area 41 can be arranged at the bottom of the water-dispersing heat-exchanging slow-flow box 4 and / or the lower side of the side wall of the water-dispersing heat-exchanging slow-flow box 4. The cold water flows towards the top of the water-dispersing heat-exchanging slow-flow box 4 under the action of pressure and flows reversely under the constraint of the top. During the flowing process, it passes through the hot water outlet pipe 2 twice, completes heat exchange and then reaches the water-dispersing area 41 and enters the inner tank 1. The cold water inside the water-dispersing heat-exchanging slow-flow box 4 is discharged horizontally or downward, which can ensure the heat exchange efficiency and also inhibit the formation of turbulence.

[0064] The sixth embodiment of the present invention proposes an energy-regulating and recycling high-efficiency water heater, and on the basis of any of the above embodiments, as Figures 1 to 2 shown, a number of water-dispersing holes 411 are provided in the water-dispersing area 41. The number of the water-dispersing holes 411 is arranged along the circumferential and / or radial direction of the water-dispersing heat-exchanging slow-flow box 4, and the aperture diameters of the number of the water-dispersing holes 411 show a decreasing trend along the direction close to the cold water inlet pipe 3.

[0065] In this embodiment, the water-dispersing area 41 can be provided with an annular through hole or a number of water-dispersing holes 411. The number of the water-dispersing holes 411 is arranged along the circumferential and / or radial direction of the water-dispersing heat-exchanging slow-flow box 4, so that the cold water flowing from the water-dispersing heat-exchanging slow-flow box 4 into the inner tank 1 forms a laminar flow, inhibiting the formation of turbulence.

[0066] The seventh embodiment of the present invention proposes an energy-regulating and recycling high-efficiency water heater, and on the basis of any of the above embodiments, as Figures 1 to 2 shown, according to the specified range of the hot water outlet temperature drop, the surface area of the pipeline of the hot water outlet pipe 2 in the water-dispersing heat-exchanging slow-flow box 4 is designed.

[0067] In this embodiment, the range of the temperature drop of the hot water outlet can be set between 5°C and 15°C. For example, when the hot water in the inner tank 1 is at the highest temperature of 75°C, the temperature of the hot water in the hot water outlet pipe 2 after heat exchange should be at least less than 5°C but higher than 60°C compared to the highest temperature. When the hot water in the inner tank 1 is at the highest temperature of 90°C, the temperature of the hot water in the hot water outlet pipe 2 after heat exchange should be around 80°C. When the temperature of the hot water in the inner tank 1 is lower than 45°C, the temperature of the hot water in the hot water outlet pipe 2 after heat exchange should be higher than 40°C. Even when the temperature of the hot water outlet is reduced to a suitable range, while ensuring safety, it also ensures a sufficient temperature for mixing with the external cold water. Since the heat transfer coefficient and the cold water inlet temperature are constant values, the surface area of the pipeline of the hot water outlet pipe 2 in the water-dispersing heat exchange slow-flow box 4 can be controlled, that is, the heat exchange area can be controlled to ensure that the temperature is reduced within a reasonable range.

[0068] The eighth embodiment of the present invention proposes an energy-regulating and recycling high-efficiency water heater, and on the basis of any of the above embodiments, as Figures 1 to 2 shown, the method for designing the surface area of the pipeline of the hot water outlet pipe 2 in the water-dispersing heat exchange slow-flow box 4 is as follows:

[0069] According to the range of the temperature drop of the hot water outlet, calculate the numerical range of the heat energy that should be exchanged between the hot water and the cold water in the hot water outlet pipe 2;

[0070] According to the magnitude of the heat energy that should be exchanged, calculate the numerical range of the surface area of the pipeline of the hot water outlet pipe 2 in the water-dispersing heat exchange slow-flow box 4.

[0071] In this embodiment, when the range of the temperature drop of the hot water outlet is between 5°C and 15°C, taking a temperature change of 5°C as the lower limit of the heat energy that should be exchanged between the hot water and the cold water in the hot water outlet pipe 2, and taking a temperature change of 15°C as the upper limit of the heat energy that should be exchanged between the hot water and the cold water in the hot water outlet pipe 2, then the heat energy that should be exchanged between the hot water and the cold water in the hot water outlet pipe 2 can be calculated by the following formula:

[0072] Q = CM(t2 - t1);

[0073] Among them, C is the mass of the hot water in the heat exchange section 22 of the hot water outlet pipe 2, M is the specific heat of the object, t2 is the temperature of the hot water in the hot water outlet pipe 2 before heat exchange, and t1 is the temperature of the hot water in the outlet pipe after heat exchange.

[0074] After obtaining the numerical range of the heat energy that should be exchanged between the hot water and the cold water in the hot water outlet pipe 2, the numerical range of the surface area of the pipeline of the hot water outlet pipe 2 in the water-dispersing heat exchange slow-flow box 4 can be calculated according to the following formula:

[0075] Q = KS(T2 - T1);

[0076] Among them, K is the heat transfer coefficient, S is the surface area of the pipeline of the hot water outlet pipe 2 in the water-dispersing heat exchange slow-flow box 4, T2 is the temperature of the hot water in the hot water outlet pipe 2 before heat exchange, and T1 is the temperature of the cold water inlet before heat exchange.

[0077] According to the calculation results, select the pipe surface area of the hot water outlet pipe 2 in the water-dispersing heat exchange slow-flow box 4 appropriately.

[0078] In the above calculation method, the calculation is usually carried out at the highest hot water temperature of the water heater. After determining the surface area of the heat exchange section 22, when the hot water temperature in the hot water outlet pipe 2 before heat exchange drops to a lower temperature, the heat exchange area and the heat transfer coefficient remain unchanged. Since the temperature difference between the cold water inlet and the hot water decreases, the heat transfer amount between the two also decreases synchronously. Therefore, even when the hot water temperature in the inner tank 1 is relatively low, the hot water outlet will not cause the outlet water temperature to drop sharply under the influence of the water-dispersing heat exchange slow-flow box 4, suppressing the fluctuation of the outlet water temperature and ensuring the stable temperature performance of the hot water output of the water heater.

[0079] The ninth embodiment of the present invention proposes an energy-regulating and recycling high-efficiency water heater, and on the basis of any one of the above embodiments, as Figures 1 to 2 shown, the pipe of the hot water outlet pipe 2 arranged in the water-dispersing heat exchange slow-flow box 4 is of a coil structure.

[0080] In this embodiment, the heat exchange section 22 is of a coil structure. Through the coil structure, the cold water in the water-dispersing heat exchange slow-flow box 4 is in full contact with the hot water outlet pipe 2, and it is convenient to adjust the pipe area of the heat exchange section 22. Preferably, the coil of the heat exchange section 22 is preferably 1-2 turns.

[0081] The tenth embodiment of the present invention proposes an energy-regulating and recycling high-efficiency water heater, and on the basis of any one of the above embodiments, as Figures 1 to 2 shown, it further includes an electric heating tube 5, and the water-dispersing heat exchange slow-flow box 4 is fixedly connected to the electric heating tube 5 and / or the inner tank 1.

[0082] In this embodiment, the electric heating tube 5 is used to heat the water in the inner tank 1. Since the heat exchange capacity of the water-dispersing heat exchange slow-flow box 4 increases with the increase of the temperature difference, the output of ultra-high temperature hot water is suppressed. When there is cold water inlet, the electric heating tube 5 can be started to heat immediately, increasing the heating time during the whole use process and improving the warm water output of the whole water heater; and it can also increase the highest temperature that the hot water in the inner tank 1 of the water heater can reach, such as setting it to 90 °C. However, to ensure the service life of the water heater, 90 °C can be set as the maximum heating mode. When the maximum mode is started and heated to 90 °C, it will automatically and forcibly exit to the normal heating mode of 75 °C until the maximum heating mode is restarted manually.

[0083] Specifically, the maximum heating mode is set manually and no more than 3 times every 24 hours.

[0084] In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0085] Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An energy regulation and recovery type high-efficiency water heater, characterized in that, Including: Inner tank (1), hot water outlet pipe (2) and cold water inlet pipe (3). A water-dispersing heat-exchanging slow-flow box (4) communicating with the inner tank (1) is arranged inside the inner tank (1). The hot water outlet pipe (2) extends into the inner tank (1) and is at least partially arranged inside the water-dispersing heat-exchanging slow-flow box (4). The cold water inlet pipe (3) communicates with the water-dispersing heat-exchanging slow-flow box (4). Cold water enters the water-dispersing heat-exchanging slow-flow box (4) through the cold water inlet pipe (3) and exchanges heat with the hot water inside the hot water outlet pipe (2) in the water-dispersing heat-exchanging slow-flow box (4).

2. The high-efficiency water heater with energy regulation and recovery according to claim 1, characterized in that, A relatively closed space is formed inside the water-dispersing heat-exchanging slow-flow box (4). After the cold water enters the relatively closed space through the cold water inlet pipe (3), it exchanges heat with the hot water inside the hot water outlet pipe (2) under the restriction of the water-dispersing heat-exchanging slow-flow box (4).

3. The energy regulation and recovery type high-efficiency water heater according to claim 2, characterized in that, The output end of the hot water outlet pipe (2) and the input end of the cold water inlet pipe (3) are arranged on the same side of the inner tank (1). The water-dispersing heat-exchanging slow-flow box (4) is arranged on one side of the inner tank (1) close to the output end of the hot water outlet pipe (2).

4. The high-efficiency water heater with energy regulation and recovery according to claim 3, characterized in that The hot water outlet pipe (2) includes a diversion section (21), a heat-exchanging section (22) and an output section (23) connected in sequence. A hot water outlet (231) is arranged at the end of the output section (23). The heat-exchanging section (22) is arranged inside the water-dispersing heat-exchanging slow-flow box (4). The diversion section (21) extends towards the other end of the inner tank (1) opposite to the position where the water-dispersing heat-exchanging slow-flow box (4) is arranged. A hot water inlet (211) is arranged at the end of the diversion section (21).

5. An energy regulation and recovery type high-efficiency water heater according to any one of claims 1 to 4, characterized in that, A water-dispersing area (41) is arranged on one side of the water-dispersing heat-exchanging slow-flow box (4) close to the cold water inlet pipe (3). The water-dispersing area (41) is used to communicate the water-dispersing heat-exchanging slow-flow box (4) with the inner tank (1) and input the cold water after heat exchange in the water-dispersing heat-exchanging slow-flow box (4) into the inner tank (1).

6. The energy regulation and recovery type high-efficiency water heater according to claim 5, characterized in that A plurality of water-dispersing holes (411) are arranged in the water-dispersing area (41). The plurality of water-dispersing holes (411) are arranged along the circumferential and / or radial direction of the water-dispersing heat-exchanging slow-flow box (4), and the aperture of the plurality of water-dispersing holes (411) shows a decreasing trend along the direction close to the cold water inlet pipe (3).

7. An energy regulation and recovery type high-efficiency water heater according to any one of claims 1 to 4, characterized in that, According to the specified range of hot water outlet temperature drop, design the pipe surface area of the hot water outlet pipe (2) inside the water-dispersing heat-exchanging slow-flow box (4).

8. The energy regulation and recycling type high-efficiency water heater according to claim 7, wherein The method for designing the pipe surface area of the hot water outlet pipe (2) inside the water-dispersing heat-exchanging slow-flow box (4) is as follows: According to the range of hot water outlet temperature drop, calculate the numerical range of the heat energy that should be exchanged between the hot water and the cold water inside the hot water outlet pipe (2). According to the magnitude of the heat energy that should be exchanged, calculate the numerical range of the pipe surface area of the hot water outlet pipe (2) inside the water-dispersing heat-exchanging slow-flow box (4).

9. An energy regulation and recovery type high-efficiency water heater according to any one of claims 1 to 4, characterized in that, The pipe of the hot water outlet pipe (2) arranged inside the water-dispersing heat-exchanging slow-flow box (4) is of a coil structure.

10. A high-efficiency water heater with energy regulation and recovery according to any one of claims 1 to 4, characterized in that, It further includes an electric heating pipe (5). The water-dispersing heat-exchanging slow-flow box (4) is fixedly connected with the electric heating pipe (5) and / or the inner tank (1).

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