Inner and outer barrel type spiral long waterway heat pump water heater water tank

Abstract

This invention relates to a spiral-shaped long-channel heat pump water heater tank with inner and outer barrels, belonging to the technical field of heat pump water heaters. It includes a heat pump unit and a hot water storage tank. The hot water storage tank has an outer barrel and an inner barrel heat exchange baffle. The inner barrel heat exchange baffle divides the interior of the outer barrel into an outer barrel water flow channel and an inner barrel water flow channel. A spiral baffle forms a spiral descending channel within the outer barrel water flow channel. The inner barrel heat exchange baffle has a meandering flow channel composed of a refrigerant inlet main channel, a refrigerant outlet main channel, and several annular micro-channels. The annular micro-channels are divided into alternating counter-clockwise and clockwise flow segments, achieving a double-sided heat exchange process where cold water first spirals down and is heated by the outer wall of the inner barrel heat exchange baffle, then rises and is heated a second time by the inner wall of the inner barrel heat exchange baffle. This ensures that the heat released by the refrigerant is fully absorbed, significantly improving heat exchange efficiency. The extended total water flow path minimizes the impact of cold water entering the thermal stratification, greatly increasing the hot water output rate.

Description

Technical Field

[0001] This invention relates to the field of heat pump water heater technology, and more specifically, to a water tank for a heat pump water heater with an inner and outer tank type spiral long water circuit. Background Technology

[0002] Household air source heat pump water heaters have been widely used in the field of domestic hot water supply due to their advantages such as energy saving, environmental protection and safety. Existing air source heat pump water heaters usually consist of a heat pump system and a hot water storage tank. The heat pump system absorbs heat from the air and transfers the heat to the water in the hot water storage tank through refrigerant circulation for heating and storage, so that users can use it at any time.

[0003] However, most mainstream air source heat pump water heaters on the market currently adopt a single-tank structure. The heat exchangers are mostly microchannel heat exchangers or coil heat exchangers attached to the outer wall of the inner tank or wrapped inside the inner tank. The microchannel heat exchanger only has one side in contact with the water for heat exchange, while the other side faces the insulation layer or the outside of the tank and cannot participate in heat exchange. This results in the heat exchange area not being fully utilized, leading to low heating efficiency. At the same time, the non-heat exchange surface of the heat exchanger is exposed to the insulation layer, which easily causes heat to be lost to the external environment, increasing the insulation burden and reducing the overall energy efficiency of the unit. More importantly, during the user's water use, cold water enters directly from the bottom of the tank and mixes extensively with the hot water at the top, destroying the thermal stratification structure inside the tank and causing the hot water temperature to drop rapidly. The hot water output rate is low. The hot water output rate of existing single-tank water tanks is generally only 75% to 85%. A large amount of heat is diluted and wasted by the incoming cold water, resulting in a shortage of hot water. To ensure their water needs are met, users are often forced to choose larger-capacity water tanks, which increases costs and occupies more installation space.

[0004] In recent years, to address the issue of low hot water output from single-tank water tanks, a solution of connecting two small tanks in series has been introduced. This approach attempts to extend the water flow path and reduce the mixing of hot and cold water by connecting two independent tanks in series. However, two independent tanks require two sets of shells, insulation layers, inlet and outlet pipes, significantly increasing material and manufacturing costs. Furthermore, the series arrangement of two tanks occupies a large amount of space, and the connection between the two tanks via pipes results in heat loss during transmission. Additionally, each tank needs to be heated separately, failing to effectively improve heating efficiency. More importantly, this solution still cannot effectively address the issue of the maximum hot water output during peak evening water usage periods and the high energy consumption in actual use.

[0005] Therefore, there is an urgent need for a type of water tank for heat pump water heaters with an inner and outer barrel spiral long water circuit to solve the above technical problems. Summary of the Invention

[0006] The purpose of this invention is to provide a water tank for a heat pump water heater with an inner and outer barrel type spiral long water circuit, thereby solving the above-mentioned technical problems.

[0007] To achieve the above objectives, the present invention provides the following technical solution: A water tank for a spiral long-circuit heat pump water heater with inner and outer tanks includes: A heat pump unit is used to absorb heat from the air and transfer it to a hot water storage tank. A hot water storage tank, located below the heat pump unit, is used to receive heat from the heat pump unit. The hot water storage tank includes a vertical cylindrical insulated outer shell and a long-flow inner tank located inside the insulated outer shell. The long-flow inner tank includes an outer barrel and an inner barrel heat exchange baffle. The outer barrel is a pressure vessel sealed on all four sides. The inner barrel heat exchange baffle is a cylindrical structure with openings at the top and bottom and is coaxially disposed inside the outer barrel. The upper end of the inner barrel heat exchange baffle is fixed to the top of the inner side of the outer barrel, and the lower end of the inner barrel heat exchange baffle has a gap with the bottom of the outer barrel. The inner barrel heat exchange baffle divides the interior of the long-flow inner tank into an outer barrel water flow channel located between the outer side of the inner barrel heat exchange baffle and the inner side of the outer barrel, and an inner barrel water flow channel located inside the inner side of the inner barrel heat exchange baffle. The inner cylinder heat exchanger baffle has a refrigerant flow channel inside. The inlet end of the refrigerant flow channel is connected to the refrigerant outlet of the heat pump unit through a refrigerant inlet pipe, and the outlet end of the refrigerant flow channel is connected to the refrigerant inlet of the heat pump unit through a refrigerant outlet pipe. The outer barrel water flow channel has a spiral baffle. The inner edge of the spiral baffle is fixed to the outer wall of the inner cylinder heat exchanger baffle, and the outer edge is fixed to the inner wall of the outer barrel. The spiral baffle divides the space between the outer barrel and the inner cylinder heat exchanger baffle into a single continuous spiral downward channel. The outer barrel has a water inlet and a water outlet. The water inlet is connected to the input end of the outer barrel water flow channel for introducing cold water, and the water outlet is connected to the output end of the inner cylinder water flow channel for outputting hot water. A control mechanism for the automated control of the water tank of the inner and outer barrel-type spiral long water circuit heat pump water heater.

[0008] Furthermore, the outer barrel includes a barrel body, a top cover, and a bottom cover, wherein the barrel body is a cylindrical shape with openings at the top and bottom, the top cover is welded to the upper end of the barrel body, and the bottom cover is welded to the lower end of the barrel body to form a pressure-bearing container sealed on all sides. The inner barrel heat exchanger is a cylindrical shape with openings at the top and bottom, and the upper end of the inner barrel heat exchanger is welded to the top cover.

[0009] Furthermore, the refrigerant flow channel includes a main refrigerant inlet channel and a main refrigerant outlet channel extending axially along the inner cylinder heat exchanger baffle, and a plurality of annular micro-channels extending circumferentially along the inner cylinder heat exchanger baffle. The main refrigerant inlet channel is connected to the refrigerant inlet pipe, and the main refrigerant outlet channel is connected to the refrigerant outlet pipe. The plurality of annular micro-channels are arranged sequentially from top to bottom along the axial direction of the inner cylinder heat exchanger baffle, and are sequentially divided into a plurality of flow channel segments from top to bottom. The annular micro-channels within each flow channel segment are connected in series end to end, and adjacent flow channel segments are connected in series. The flow channels are connected by a transition channel, wherein the annular microchannels in the odd-numbered flow channels are arranged counterclockwise, causing the refrigerant to flow counterclockwise in the odd-numbered flow channels, and the annular microchannels in the even-numbered flow channels are arranged clockwise, causing the refrigerant to flow clockwise in the even-numbered flow channels, forming a meandering flow path with alternating counterclockwise and clockwise flow. The refrigerant inlet main channel is connected to the first annular microchannel of the first flow channel, and the last annular microchannel of the last flow channel is connected to the refrigerant outlet main channel.

[0010] Furthermore, the number of flow channel sections is set according to the height of the inner cylinder heat exchange baffle and the heat exchange requirements, and is at least two; the cross-section of the annular microchannel is a square with a side length of less than 1.5mm.

[0011] Furthermore, the spiral direction of the spiral spacer is either counterclockwise or clockwise.

[0012] Furthermore, a flow meter is installed at the water inlet to detect water flow data; a first temperature sensor, a second temperature sensor, and a third temperature sensor are installed along the water flow direction on the long flow inner tank. The first temperature sensor is located in the upper section of the water flow channel of the outer tank and is used to detect the water temperature of the outer tank in the inlet section. The second temperature sensor is located in the middle section of the water flow channel of the outer tank and is used to detect the water temperature of the middle section of the outer tank. The third temperature sensor is located in the upper section of the water flow channel of the inner tank and is used to detect the water temperature of the end section of the inner tank.

[0013] Furthermore, the bottom of the outer barrel is provided with a drain outlet for cleaning sediment.

[0014] Furthermore, the heat pump unit includes a compressor, a fan, a finned evaporator, an electronic throttle, and refrigerant piping. The fan is located on top of the heat pump unit, and an air outlet is provided on the top of the heat pump unit corresponding to the air outlet position of the fan. The finned evaporator is cylindrical and located on the outer circumference of the heat pump unit. The output end of the finned evaporator is connected to the air inlet of the fan, and the input end is connected to the outside air. A grille air inlet is provided on the outer circumference of the heat pump unit corresponding to the input end position of the finned evaporator. The compressor, the electronic throttle, and the refrigerant piping are all located inside the heat pump unit and below the fan. The refrigerant piping connects the compressor, the... The finned evaporator, the electronic throttle, and the refrigerant channels within the inner cylinder heat exchange baffle are sequentially connected to form a closed refrigerant circulation loop. The compressor is used to compress the low-temperature, low-pressure gaseous refrigerant into a high-temperature, high-pressure gaseous refrigerant and deliver it to the refrigerant channels within the inner cylinder heat exchange baffle. The refrigerant channels are used to exchange heat between the high-temperature, high-pressure gaseous refrigerant and water. After condensing and releasing heat, the high-temperature, high-pressure gaseous refrigerant becomes a high-pressure liquid refrigerant. The electronic throttle is used to throttle and reduce the pressure of the condensed high-pressure liquid refrigerant into a low-temperature, low-pressure liquid refrigerant. The finned evaporator is used to absorb heat from the outside air and evaporate the throttled, low-pressure liquid refrigerant into a low-temperature, low-pressure gaseous refrigerant and deliver it to the compressor.

[0015] A dynamic control method for the water tank of an internal and external tank-type spiral long water circuit heat pump water heater, used for the aforementioned internal and external tank-type spiral long water circuit heat pump water heater, includes the following steps: S1. Initialization and Safety Detection: Upon initial power-on, the control mechanism reads the temperature values ​​detected by the first, second, and third temperature sensors and determines whether all three temperature values ​​have reached the user-set target temperature T0. If all three have reached the target temperature, the control mechanism keeps the heat pump unit in standby mode and does not start heating. If there is a temperature point that has not reached the target temperature T0, the control mechanism enters the heating preparation program. Before heating starts, the control mechanism checks whether all three temperature values ​​are lower than the preset safe temperature T1. If there is a temperature point that is higher than the safe temperature T1, the control mechanism keeps the heat pump unit in standby mode and waits for the temperature point to drop below the safe temperature T1 before starting heating. S2. Water usage data collection and storage: When the water tank reaches the target temperature T0 for the first time, the control mechanism monitors the water usage data of the flow meter at the inlet in real time. When water usage is detected, recording begins. The water usage period and the corresponding water usage curve are recorded in a preset period S1. The water usage period is divided into hours. The water usage curve records the cumulative water usage and instantaneous water usage in each water usage period. S3. Water Use Feature Factor Extraction: The control mechanism extracts features from the collected water use data, recording and processing the data using five feature factors, as detailed below: Factor 1: 24-hour time period characteristics, dividing the day into peak water usage periods, off-peak water usage periods, and periods of low water usage by hour; Factor 2: Weekday characteristics, recording water usage patterns from Monday to Friday; Factor 3: Weekend characteristics, recording water usage patterns on Saturdays and Sundays; Factor 4: Holiday characteristics, recording water usage patterns during national statutory holidays and user-defined holidays; Factor 5: Seasonal characteristics, recording water usage patterns under different ambient temperatures in the four seasons of spring, summer, autumn, and winter; Based on the above five characteristic factors, the control mechanism constructs a user water demand prediction model using a time series prediction algorithm. The time series prediction algorithm includes, but is not limited to, the ARIMA model, the Prophet model, or the LSTM long short-term memory neural network model. The weight coefficients of each characteristic factor are obtained by training with historical water use data, and a water use curve prediction model is generated in units of 24 hours, weekdays, weekends, holidays, and four seasons. S4. Real-time environmental data acquisition and dynamic heating capacity calculation: The control mechanism acquires the ambient temperature of the user's location in real time through the network module and uses the ambient temperature as factor 7; The control mechanism calculates the dynamic heating capacity at the ambient temperature of the day based on the ambient temperature data of factor 7 and the performance curve of the heat pump host, and uses it as factor 8. The dynamic heating capacity is the product of the rated heating capacity of the heat pump host at a specific ambient temperature and the attenuation coefficient. S5. Adaptive Heating Strategy Formulation: The control mechanism integrates the water demand prediction model constructed by factors 1 to 5, the ambient temperature data of the day by factor 7, and the dynamic heating capacity by factor 8 to make adaptive heating predictions for user hot water demand. This includes the following sub-steps: S51: Based on the water demand prediction model, predict the predicted water consumption V1 for each period in the next 24 hours; S52: Calculate the required hot water reserve V2 based on the predicted water consumption V1, wherein the hot water reserve is equal to the predicted water consumption V1 multiplied by the safety factor x; S53: Calculate the current effective hot water storage capacity V2' based on the temperature values ​​detected by the first temperature sensor, the second temperature sensor, and the third temperature sensor; S54: When the current effective hot water storage V2' is lower than the predicted water consumption V1, calculate the required additional heat value Q, satisfying the following relationship:

[0016] In the formula, Q represents the required heat value, in J; T0 represents the target temperature set by the user, in °C; T′ represents the average temperature of the current effective hot water, which is calculated by weighted average of the temperature values ​​detected by the first, second, and third temperature sensors, in °C; c represents the specific heat capacity of water, with a value of 4186 J / (kg·°C); ρ represents the density of water, with a value of 1000 kg / m³; V1 represents the predicted water consumption, in m³; and V2′ represents the predicted water consumption, in m³. S55: Calculate the optimal heating start-up time and heating duration based on the required heat value Q, the dynamic heating capacity of the heat pump host, and the predicted water usage period. The optimal heating start-up time ensures that heating is completed before the peak water usage period. The heating duration is equal to the required heat value Q divided by the dynamic heating capacity. S6. Operation control of the heat pump host: The control mechanism generates operation instructions for the heat pump host according to the adaptive heating strategy formulated in step S5. The operation instructions include start / stop instructions and frequency conversion instructions. The control mechanism starts the heat pump host for heating during periods of low water consumption, completes heating before peak water consumption and keeps it in standby mode. When the predicted water consumption is large, the control mechanism controls the heat pump host to operate at high frequency to increase heating capacity. When the predicted water consumption is small, the control mechanism controls the heat pump host to operate at low frequency to reduce energy consumption, thereby achieving on-demand heating. S7. Adaptive Update: After each water usage cycle, the control mechanism compares the actual water usage data with the predicted water usage data, calculates the prediction error, and corrects the model parameters in real time so that the model can continuously adapt to changes in user water usage habits. The control mechanism records the execution effect of each heating strategy, including actual energy consumption, water temperature holding time, and user satisfaction feedback, which are used to optimize the calculation logic of the safety factor x and the start-up timing of the heating strategy.

[0017] Furthermore, the preset period S1 is 7 days, the target temperature T0 is 55℃, and the safe temperature T1 is 80℃.

[0018] In summary, compared with the prior art, the beneficial effects of the present invention are: The water inlet, outer barrel water flow channel, inner barrel water flow channel, and outlet of this invention are sequentially connected to form a U-shaped water path, which fully considers the internal thermal stratification protection mechanism of the water tank. After entering through the water inlet, cold water is guided by the spiral partition to spirally descend in the outer barrel water flow channel. During this process, the cold water is always confined to the outside of the inner barrel heat exchange partition, and is physically isolated from the hot water layer inside the inner barrel heat exchange partition, avoiding damage to the thermal stratification structure caused by the direct impact of cold water on the hot water layer. After the water reaches the bottom of the outer barrel, it flows upward into the inner barrel water flow channel through the gap, taking advantage of the natural upward floating characteristic of hot water, so that hot water is preferentially output from the outlet, thereby maximizing the protection of the internal thermal stratification structure of the water tank and significantly improving the hot water output rate.

[0019] Meanwhile, the inner cylinder heat exchange baffle of this invention performs both heat exchange and isolation functions. Its outer wall contacts the cold water in the outer barrel water flow channel, while its inner wall contacts the hot water in the inner cylinder water flow channel. The refrigerant flows in the microchannels inside the inner cylinder heat exchange baffle wall, achieving single-wall double-sided heat exchange. The heat exchange area is doubled compared to the traditional single-sided heat exchange structure, allowing the heat released by the refrigerant to be transferred to the water more efficiently. Furthermore, the water is first heated by the outer wall of the inner cylinder heat exchange baffle during the spiral descent of the outer barrel, and then heated again by the inner wall of the inner cylinder heat exchange baffle during the ascent of the inner barrel, forming a two-stage heating process. The total water flow path length is much greater than the axial height of the water tank, effectively extending the contact time between the water and the heat exchange surface.

[0020] The synergistic effect of double-sided heat exchange and the long water path ensures that the heat released by the refrigerant is fully absorbed, significantly improving heat exchange efficiency. The synergistic effect of the U-shaped water path and the thermal stratification protection mechanism minimizes the impact of cold water entering on thermal stratification, greatly increasing hot water output. These two elements work together to achieve a dual improvement in the two core performance indicators of heat exchange efficiency and hot water output. With the same tank volume, more effective hot water can be provided; with the same hot water demand, a smaller tank volume can be used, thereby reducing product cost and installation space requirements. Simultaneously, it reduces heat loss and energy consumption, achieving highly efficient and energy-saving technical effects. Attached Figure Description

[0021] Figure 1 This is a cross-sectional schematic diagram of the water tank of the inner and outer barrel type spiral long water circuit heat pump water heater of the present invention; Figure 2 This is a schematic diagram of the long-flow inner liner of the present invention; Figure 3 This is a schematic diagram of the hot water storage tank of the present invention; Figure 4 This is a schematic diagram of the internal flow path of the heat exchange diaphragm of the inner cylinder of the present invention; Among them, 1-hot water storage tank, 11-insulation shell, 12-long flow inner tank, 121-outer tank, 1211-water inlet, 1212-water outlet, 1213-drain outlet, 122-inner cylinder heat exchange baffle, 13-refrigerant flow channel, 131-refrigerant inlet main channel, 132-refrigerant outlet main channel, 2-heat pump host, 21-fan, 22-air outlet, 23-grid air inlet, 3-fluorine inlet pipe, 4-fluorine outlet pipe, 5-spiral baffle, 6-flow meter, 7-first temperature sensor, 8-second temperature sensor, 9-third temperature sensor. Detailed Implementation

[0022] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments given herein are for illustration and explanation only and are not intended to limit the present invention.

[0023] like Figures 1 to 4 As shown, a water tank for an inner and outer tank type spiral long water circuit heat pump water heater includes: The heat pump unit 2 is used to absorb heat from the air and transfer the heat to the hot water storage tank 1; A hot water storage tank 1, located below the heat pump unit 2, is used to receive heat from the heat pump unit 2. The hot water storage tank 1 includes a vertical cylindrical insulated outer shell 11 and a long-flow inner tank 12 located inside the insulated outer shell 11. The long-flow inner tank 12 includes an outer barrel 121 and an inner cylinder heat exchange baffle 122. The outer barrel 121 is a pressure vessel sealed on all four sides. The inner cylinder heat exchange baffle 122 is a cylindrical structure with openings at the top and bottom and is coaxially located inside the outer barrel 121. The upper end of the inner cylinder heat exchange baffle 122 is fixed to the top of the inner side of the outer barrel 121, and the lower end of the inner cylinder heat exchange baffle 122 has a gap with the bottom of the outer barrel 121. The inner cylinder heat exchange baffle 122 divides the interior of the long-flow inner tank 12 into an outer barrel water flow channel located between the outer side of the inner cylinder heat exchange baffle 122 and the inner side of the outer barrel 121, and an inner cylinder water flow channel located inside the inner side of the inner cylinder heat exchange baffle 122. The inner drum water flow channel has a refrigerant flow channel 13 inside the inner drum heat exchanger 122. The inlet end of the refrigerant flow channel 13 is connected to the refrigerant outlet of the heat pump host 2 through the refrigerant inlet pipe 3, and the outlet end of the refrigerant flow channel 13 is connected to the refrigerant inlet of the heat pump host 2 through the refrigerant outlet pipe 4. The outer drum water flow channel has a spiral baffle 5. The inner edge of the spiral baffle 5 is fixed to the outer wall of the inner drum heat exchanger 122, and the outer edge is fixed to the inner wall of the outer drum 121. The spiral baffle 5 divides the space between the outer drum 121 and the inner drum heat exchanger 122 into a single continuous spiral downward channel. The outer drum 121 has a water inlet 1211 and a water outlet 1212. The water inlet 1211 is connected to the input end of the outer drum water flow channel for introducing cold water, and the water outlet 1212 is connected to the output end of the inner drum water flow channel for outputting hot water. The control mechanism is used for the automated control of the water tank in an internal and external barrel-type spiral long water circuit heat pump water heater.

[0024] The inlet 1211, the outer barrel water flow channel, the inner barrel water flow channel, and the outlet 1212 of the present invention are sequentially connected to form a U-shaped water channel, and its specific working process is as follows: 1) Initial heat exchange: Cold water enters the long-flow inner tank 12 through the inlet 1211 and first flows into the outer tank water flow channel. The outer tank water flow channel is divided into a single continuous spiral downward channel by the spiral baffle 5. Guided by the spiral baffle 5, the cold water flows downward in a spiral shape along the space between the inner wall of the outer tank 121 and the outer wall of the inner tank heat exchange baffle 122. During the spiral downward process, the cold water maintains continuous contact with the outer wall of the inner tank heat exchange baffle 122. At this time, the water flows through the inner tank heat exchange baffle... The high-temperature and high-pressure gaseous refrigerant in the internal refrigerant flow channel 13 of the inner cylinder transfers heat to the outer wall through the wall of the inner cylinder heat exchange baffle 122. As the cold water flows downward, it is heated for the first time by the outer wall of the inner cylinder heat exchange baffle 122. The spiral baffle 5 not only extends the flow path of the cold water in the water flow channel of the outer cylinder, greatly increasing the contact time between the cold water and the heat exchange surface, but also makes the cold water flow evenly across the entire outer wall surface through the spiral guiding effect, avoiding the phenomenon of water flow short circuit or uneven local heat exchange. 2) Water flow reversal and secondary heat exchange: After cold water reaches the bottom of the outer barrel 121 along the spiral baffle 5, it enters the inner barrel water flow channel through the gap between the lower end of the inner barrel heat exchange baffle 122 and the bottom of the outer barrel 121. The water flow direction changes from downward spiral flow to upward axial flow and enters the inner side of the inner barrel heat exchange baffle 122. During the upward flow, the water flow is in continuous contact with the inner wall of the inner barrel heat exchange baffle 122. While the water flow is upward, it is heated for the second time by the inner wall of the inner barrel heat exchange baffle 122. After being heated twice, the water temperature is close to or reaches the target temperature set by the user. Finally, it flows out as hot water from the outlet 1212 for the user to use.

[0025] The U-shaped water circuit design of this invention fully considers the protection of internal thermal stratification in the water tank. Due to the higher density of cold water and the lower density of hot water, in a traditional single-tank water tank, when cold water enters from the bottom, it directly impacts the hot water layer, causing a large-scale mixing of cold and hot water, destroying the thermal stratification structure, and resulting in a significant reduction in hot water output. In this invention, however, cold water enters from the upper part of the outer tank 121 and flows downward along the spiral descending channel in the water flow channel of the outer tank. During this process, the cold water is always confined to the outside of the heat exchange partition 122 of the inner cylinder, and is physically isolated from the hot water layer of the water flow channel of the inner cylinder by the heat exchange partition 122 of the inner cylinder. The cold water cannot directly impact the hot water layer of the water flow channel of the inner cylinder. At the same time, as the cold water is gradually heated during the spiral descent, its temperature has increased when it reaches the bottom of the outer tank 121, further reducing the temperature difference with the hot water in the water flow channel of the inner cylinder. When the water flows upward through the bottom gap into the water flow channel of the inner cylinder, the mixing and impact with the hot water is minimized. In addition, the outlet 1212 is located at the upper end of the inner cylinder water flow channel. Hot water flows out from the upper end of the inner cylinder heat exchange baffle 122, taking advantage of the natural upward floating characteristic of hot water, so that hot water is output first, while cold water is always confined in the outer cylinder water flow channel, thus protecting the internal thermal stratification structure of the water tank to the greatest extent.

[0026] Furthermore, the outer barrel 121 includes a barrel body, a top cover, and a bottom cover. The barrel body is a cylindrical shape with openings at the top and bottom. The top cover is welded to the upper end of the barrel body, and the bottom cover is welded to the lower end of the barrel body to form a pressure vessel that is sealed on all sides. The inner barrel heat exchanger 122 is a cylindrical shape with openings at the top and bottom. The upper end of the inner barrel heat exchanger 122 is welded to the top cover.

[0027] Furthermore, the refrigerant flow channel 13 includes a refrigerant inlet main channel 131 and a refrigerant outlet main channel 132 extending axially along the inner cylinder heat exchanger 122, as well as several annular micro-channels extending circumferentially along the inner cylinder heat exchanger 122. The refrigerant inlet main channel 131 is connected to the refrigerant inlet pipe 3, and the refrigerant outlet main channel 132 is connected to the refrigerant outlet pipe 4. The several annular micro-channels are arranged sequentially from top to bottom along the axial direction of the inner cylinder heat exchanger 122, and are divided into several flow channel segments from top to bottom. The annular micro-channels in each flow channel segment are connected in series end to end. Adjacent flow channels are connected by transition channels. The annular microchannels in the odd-numbered flow channels are arranged counterclockwise, allowing the refrigerant to flow counterclockwise in the odd-numbered flow channels. The annular microchannels in the even-numbered flow channels are arranged clockwise, allowing the refrigerant to flow clockwise in the even-numbered flow channels. This forms a meandering flow path with alternating counterclockwise and clockwise flow. The refrigerant inlet main channel 131 is connected to the first annular microchannel of the first flow channel, and the last annular microchannel of the last flow channel is connected to the refrigerant outlet main channel 132.

[0028] The refrigerant flow channel 13 of this invention adopts a combined layout of "axial main channel + circumferential micro-channel". The refrigerant inlet main channel 131 and the refrigerant outlet main channel 132 are respectively responsible for introducing high-temperature and high-pressure gaseous refrigerant from the refrigerant inlet pipe 3 into the flow channel section, and for exporting the high-pressure liquid refrigerant after heat exchange to the refrigerant outlet pipe 4. Several annular micro-channels extend circumferentially along the inner cylinder heat exchange partition 122 and are arranged sequentially from top to bottom along the axial direction to form a multi-layer annular heat exchange structure. Each layer of annular micro-channels is in close contact with the wall surface of the inner cylinder heat exchange partition 122. When the refrigerant flows in the annular micro-channels, heat is transferred to the wall surface of the inner cylinder heat exchange partition 122 through the wall surface of the annular micro-channels, thereby heating the water flowing through the outer cylinder water flow channel and the inner cylinder water flow channel.

[0029] To further extend the heat exchange path of the refrigerant, this invention divides several annular microchannels arranged along the axial direction into multiple flow channel segments connected end to end. The refrigerant must flow through all the annular microchannels in each flow channel segment in sequence before entering the next flow channel segment, so that the refrigerant obtains an extremely long flow path in a limited space. Its total flow length is much greater than the axial height of the inner cylinder heat exchange baffle 122, which significantly extends the heat exchange time between the refrigerant and the wall.

[0030] Meanwhile, the refrigerant flows in opposite directions in adjacent flow channels. In odd-numbered flow channels, the refrigerant flows counterclockwise, while in even-numbered flow channels, the refrigerant flows clockwise. Each time the flow direction reverses, the refrigerant's flow state changes abruptly, generating strong secondary flow and eddies. This promotes the redistribution and uniform mixing of heat within the refrigerant, effectively preventing local overheating or undercooling. This makes the overall temperature distribution of the inner cylinder heat exchange baffle 122 more uniform, improving heat exchange efficiency and heat exchange uniformity.

[0031] Furthermore, the number of flow channel sections is set according to the height of the inner cylinder heat exchange baffle 122 and the heat exchange requirements, and is at least two; the cross-section of the annular microchannel is a square with a side length of less than 1.5mm.

[0032] When there are four flow channel sections, they are arranged from top to bottom as the first flow channel section, the second flow channel section, the third flow channel section and the fourth flow channel section. The annular microchannels in the first and third flow channel sections are arranged in a counterclockwise direction, while the annular microchannels in the second and fourth flow channel sections are arranged in a clockwise direction. When there are six flow channel segments, from top to bottom they are the first flow channel segment, the second flow channel segment, the third flow channel segment, the fourth flow channel segment, the fifth flow channel segment and the sixth flow channel segment. The annular microchannels in the odd-numbered flow channel segments are arranged in a counterclockwise direction, and the annular microchannels in the even-numbered flow channel segments are arranged in a clockwise direction.

[0033] Furthermore, the spiral direction of the spiral spacer 5 is either counterclockwise or clockwise.

[0034] Furthermore, a flow meter 6 is installed at the water inlet 1211 to detect water flow data; a first temperature sensor 7, a second temperature sensor 8, and a third temperature sensor 9 are installed along the water flow direction on the long flow inner tank 12. The first temperature sensor 7 is located in the upper section of the outer tank water flow channel to detect the water temperature of the outer tank 121 in the water inlet section. The second temperature sensor 8 is located in the middle section of the outer tank water flow channel to detect the water temperature of the middle section of the outer tank 121. The third temperature sensor 9 is located in the upper section of the inner tank water flow channel to detect the water temperature of the end section of the inner tank.

[0035] At different locations along the U-shaped water flow path, a first temperature sensor 7, a second temperature sensor 8, and a third temperature sensor 9 are respectively installed. The first temperature sensor 7 is located in the upper section of the outer tank water flow channel and is used to detect the inlet water temperature before the initial heat exchange after the cold water enters. The second temperature sensor 8 is located in the middle section of the outer tank water flow channel and is used to detect the intermediate temperature of the cold water after the first heating during the spiral descent. The third temperature sensor 9 extends into the upper section of the inner tank water flow channel through a temperature-sensing blind tube and is used to detect the temperature of the hot water about to flow out after two heating cycles. The three temperature sensors are arranged sequentially along the water flow direction to collect dynamic temperature change data of the entire U-shaped water flow path in real time. This provides the control mechanism with temperature information for the entire process, enabling the control mechanism to accurately calculate the current effective hot water storage and formulate the optimal heating strategy accordingly.

[0036] Furthermore, the bottom of the outer barrel 121 is provided with a drain outlet 1213 for cleaning sediment.

[0037] Furthermore, the heat pump unit 2 includes a compressor, a fan 21, a finned evaporator, an electronic throttle, and refrigerant piping. The fan 21 is located on top of the heat pump unit 2, and an air outlet 22 is provided on the top of the heat pump unit 2 corresponding to the air outlet position of the fan 21. The finned evaporator is cylindrical and located on the outer circumference of the heat pump unit 2. The output end of the finned evaporator is connected to the air inlet of the fan 21, and the input end is connected to the outside air. A grille air inlet 23 is provided on the outer circumference of the heat pump unit 2 corresponding to the input end position of the finned evaporator. The compressor, electronic throttle, and refrigerant piping are all located inside the heat pump unit 2 and below the fan 21. The refrigerant piping connects the compressor, finned evaporator, and air outlet. The compressor, electronic throttle, and refrigerant flow channel 13 within the inner cylinder heat exchange baffle 122 are sequentially connected to form a closed refrigerant circulation loop. The compressor is used to compress the low-temperature, low-pressure gaseous refrigerant into a high-temperature, high-pressure gaseous refrigerant and deliver it to the refrigerant flow channel 13 within the inner cylinder heat exchange baffle 122. The refrigerant flow channel 13 is used to exchange heat between the high-temperature, high-pressure gaseous refrigerant and water. After the high-temperature, high-pressure gaseous refrigerant condenses and releases heat, it becomes a high-pressure liquid refrigerant. The electronic throttle is used to throttle and reduce the pressure of the condensed high-pressure liquid refrigerant into a low-temperature, low-pressure liquid refrigerant. The finned evaporator is used to absorb heat from the outside air and evaporate the throttled and reduced-pressure low-temperature, low-pressure liquid refrigerant into a low-temperature, low-pressure gaseous refrigerant and deliver it to the compressor.

[0038] In another implementation scheme, the lower end of the inner cylinder heat exchange baffle 122 is welded and fixed to the bottom cover of the outer cylinder 121, and a gap is left between the upper end of the inner cylinder heat exchange baffle 122 and the top cover of the outer cylinder 121, forming a cantilever beam structure with the lower end fixed and the upper end free. Correspondingly, the inlet 1211 is located on the lower side wall of the outer cylinder 121 and communicates with the lower end of the outer cylinder water flow channel for introducing cold water; the outlet 1212 is located on the lower side wall or bottom cover of the outer cylinder 121 and communicates with the lower end of the inner cylinder water flow channel for outputting hot water; the spiral baffle 5 divides the space between the outer cylinder 121 and the inner cylinder heat exchange baffle 122 into a single continuous spiral upward channel. After entering through the inlet 1211, the cold water flows upward in the outer cylinder water flow channel along the spiral upward channel formed by the spiral baffle 5. During the process, the water exchanges heat with the outer wall of the inner cylinder heat exchange partition 122. After the water reaches the top of the outer cylinder 121, it enters the inner cylinder water flow channel through the gap between the upper end of the inner cylinder heat exchange partition 122 and the top cover, and flows downward in the inner cylinder water flow channel. During the flow, it exchanges heat again with the inner wall of the inner cylinder heat exchange partition 122. Finally, the hot water flows out from the outlet 1212. This solution places both the inlet and outlet 1212 at the bottom of the water tank, which facilitates the centralized arrangement of the bottom pipes. It is suitable for floor-mounted installations or application scenarios where the inlet and outlet pipes need to be led out from the bottom.

[0039] A dynamic control method for the water tank of an internal and external tank-type spiral long water circuit heat pump water heater, comprising the following steps: S1. Initialization and Safety Detection: Upon initial power-on, the control mechanism reads the temperature values ​​detected by the first temperature sensor 7, the second temperature sensor 8, and the third temperature sensor 9, and determines whether all three temperature values ​​have reached the user-set target temperature T0. If all three have reached the target temperature, the heat pump host 2 is kept in standby mode and heating is not started. If there is a temperature point that has not reached the target temperature T0, the heating preparation program is entered. Before heating starts, the control mechanism checks whether all three temperature values ​​are lower than the preset safe temperature T1. If there is a temperature point that is higher than the safe temperature T1, the heat pump host 2 is kept in standby mode and waits for the temperature point to drop below the safe temperature T1 before starting heating. S2. Water usage data collection and storage: When the water tank reaches the target temperature T0 for the first time, the control mechanism monitors the water usage data of the flow meter 6 at the inlet 1211 in real time. When water usage is detected, recording begins. The water usage period and the corresponding water usage curve are recorded in a preset period S1. The water usage period is divided into hours, and the water usage curve records the cumulative water usage and instantaneous water usage in each water usage period. S3. Water Use Feature Factor Extraction: The control unit extracts features from the collected water use data, recording and processing the data using five feature factors, as detailed below: Factor 1: 24-hour time period characteristics, dividing the day into peak water usage periods, off-peak water usage periods, and periods of low water usage by hour; Factor 2: Weekday characteristics, recording water usage patterns from Monday to Friday; Factor 3: Weekend characteristics, recording water usage patterns on Saturdays and Sundays; Factor 4: Holiday characteristics, recording water usage patterns during national statutory holidays and user-defined holidays; Factor 5: Seasonal characteristics, recording water usage patterns under different ambient temperatures in the four seasons of spring, summer, autumn, and winter; Based on the above five characteristic factors, the control agency uses time series prediction algorithms to construct a user water demand prediction model. The time series prediction algorithm includes, but is not limited to, ARIMA model, Prophet model or LSTM long short-term memory neural network model. The weight coefficients of each characteristic factor are obtained by training with historical water use data, and water use curve prediction models are generated in units of 24 hours, weekdays, weekends, holidays and four seasons. S4. Real-time environmental data acquisition and dynamic heating calculation: The control mechanism acquires the ambient temperature of the user's location in real time through the network module and uses the ambient temperature as factor 7. Based on the ambient temperature data of factor 7 and the performance curve of the heat pump host 2, the control mechanism calculates the dynamic heating at the ambient temperature of the day and uses it as factor 8. The dynamic heating is the product of the rated heating of the heat pump host 2 at a specific ambient temperature and the attenuation coefficient. S5. Adaptive Heating Strategy Formulation: The control mechanism integrates the water demand prediction model constructed from factors 1 to 5, the ambient temperature data of the day (factor 7), and the dynamic heating capacity (factor 8) to predict the user's hot water demand for adaptive heating. This includes the following sub-steps: S51: Based on the water demand forecasting model, predict the predicted water consumption V1 for each period in the next 24 hours; S52: Calculate the required hot water reserve V2 based on the predicted water consumption V1. The hot water reserve is equal to the predicted water consumption V1 multiplied by the safety factor x. S53: Calculate the current effective hot water storage capacity V2' based on the temperature values ​​detected by the first temperature sensor 7, the second temperature sensor 8, and the third temperature sensor 9; S54: When the current effective hot water storage V2' is lower than the predicted water consumption V1, calculate the required additional heat value Q, satisfying the following relationship:

[0040] In the formula, Q is the required heat value, in J; T0 is the target temperature set by the user, in °C; T′ is the average temperature of the current effective hot water, which is calculated by weighted average of the temperature values ​​detected by the first temperature sensor 7, the second temperature sensor 8, and the third temperature sensor 9, in °C; c is the specific heat capacity of water, with a value of 4186 J / (kg·°C); ρ is the density of water, with a value of 1000 kg / m³; V1 is the predicted water consumption, in m³; V2′ is the predicted water consumption, in m³. S55: Calculate the optimal heating start-up time and heating duration based on the required heat value Q, the dynamic heating capacity of the heat pump unit 2, and the predicted water usage period. The optimal heating start-up time ensures that heating is completed before the peak water usage period. The heating duration is equal to the required heat value Q divided by the dynamic heating capacity. S6. Heat pump unit 2 operation control: The control mechanism generates operation instructions for the heat pump unit 2 according to the adaptive heating strategy formulated in step S5. The operation instructions include start-stop instructions and frequency conversion instructions. The control mechanism starts the heat pump unit 2 for heating during the low water consumption period, completes heating before the peak water consumption period and keeps it in standby mode. When the predicted water consumption is large, the control mechanism controls the heat pump unit 2 to operate at high frequency to increase the heating capacity. When the predicted water consumption is small, the control mechanism controls the heat pump unit 2 to operate at low frequency to reduce energy consumption, so as to achieve on-demand heating. S7. Adaptive Update: After each water usage cycle, the control mechanism compares the actual water usage data with the predicted water usage data, calculates the prediction error, and makes real-time corrections to the model parameters, so that the model can continuously adapt to changes in users' water usage habits. The control mechanism records the execution effect of each heating strategy, including actual energy consumption, water temperature holding time, and user satisfaction feedback, which are used to optimize the calculation logic of the safety factor x and the start-up timing of the heating strategy.

[0041] Furthermore, the preset cycle S1 is 7 days, the target temperature T0 is 55℃, and the safe temperature T1 is 80℃.

[0042] The dynamic control method of this invention constructs a complete intelligent control closed-loop system. Three temperature sensors are arranged along a U-shaped water path to collect real-time water temperature data throughout the entire process. Combined with the water flow monitoring of flow meter 6, it provides accurate dynamic sensing capability for hot water reserves, enabling the system to accurately determine the difference between the current effective hot water storage and the predicted water consumption, avoiding misjudgments caused by traditional water tanks relying solely on single-point temperature. Secondly, by constructing a user water demand prediction model through algorithms, the system can accurately learn users' water usage habits, achieving on-demand heating rather than blind heating, effectively avoiding energy waste caused by excessive hot water storage. Furthermore, by acquiring real-time ambient temperature through network connection and calculating dynamic heating capacity based on the performance curve of the heat pump host 2, the system can adaptively adjust the heating strategy according to environmental changes, ensuring early heating in low-temperature environments and delayed heating in high-temperature environments, further improving energy efficiency. This achieves a staggered operation strategy of heating during off-peak water usage periods and completing heating before peak water usage periods, significantly reducing actual energy consumption while ensuring a comfortable user experience.

[0043] It should be understood that the above embodiments are one or more embodiments of the present invention. There are many other embodiments and variations based on the present invention. Any variations and modifications made by those skilled in the art without making pioneering innovations are within the protection scope of the present invention.

Claims

1. A water tank for a spiral long-circuit heat pump water heater with inner and outer barrels, characterized in that, include: A heat pump unit is used to absorb heat from the air and transfer it to a hot water storage tank. A hot water storage tank, located below the heat pump unit, is used to receive heat from the heat pump unit. The hot water storage tank includes a vertical cylindrical insulated outer shell and a long-flow inner tank located inside the insulated outer shell. The long-flow inner tank includes an outer barrel and an inner barrel heat exchange baffle. The outer barrel is a pressure vessel sealed on all four sides. The inner barrel heat exchange baffle is a cylindrical structure with openings at the top and bottom and is coaxially disposed inside the outer barrel. The upper end of the inner barrel heat exchange baffle is fixed to the top of the inner side of the outer barrel, and the lower end of the inner barrel heat exchange baffle has a gap with the bottom of the outer barrel. The inner barrel heat exchange baffle divides the interior of the long-flow inner tank into an outer barrel water flow channel located between the outer side of the inner barrel heat exchange baffle and the inner side of the outer barrel, and an inner barrel water flow channel located inside the inner side of the inner barrel heat exchange baffle. The inner cylinder heat exchanger baffle has a refrigerant flow channel inside. The inlet end of the refrigerant flow channel is connected to the refrigerant outlet of the heat pump unit through a refrigerant inlet pipe, and the outlet end of the refrigerant flow channel is connected to the refrigerant inlet of the heat pump unit through a refrigerant outlet pipe. The outer barrel water flow channel has a spiral baffle. The inner edge of the spiral baffle is fixed to the outer wall of the inner cylinder heat exchanger baffle, and the outer edge is fixed to the inner wall of the outer barrel. The spiral baffle divides the space between the outer barrel and the inner cylinder heat exchanger baffle into a single continuous spiral downward channel. The outer barrel has a water inlet and a water outlet. The water inlet is connected to the input end of the outer barrel water flow channel for introducing cold water, and the water outlet is connected to the output end of the inner cylinder water flow channel for outputting hot water. A control mechanism for the automated control of the water tank of the inner and outer barrel-type spiral long water circuit heat pump water heater.

2. The water tank of the inner and outer barrel type spiral long water circuit heat pump water heater according to claim 1, characterized in that: The outer barrel includes a barrel body, a top cover, and a bottom cover. The barrel body is a cylindrical shape with openings at the top and bottom. The top cover is welded to the upper end of the barrel body, and the bottom cover is welded to the lower end of the barrel body to form a pressure vessel that is sealed on all sides. The inner barrel heat exchanger is a cylindrical shape with openings at the top and bottom, and the upper end of the inner barrel heat exchanger is welded to the top cover.

3. The water tank of the inner and outer barrel type spiral long water circuit heat pump water heater according to claim 1, characterized in that: The refrigerant flow channel includes a main refrigerant inlet channel and a main refrigerant outlet channel extending axially along the inner cylinder heat exchanger baffle, and several annular micro-channels extending circumferentially along the inner cylinder heat exchanger baffle. The main refrigerant inlet channel is connected to the refrigerant inlet pipe, and the main refrigerant outlet channel is connected to the refrigerant outlet pipe. The several annular micro-channels are arranged sequentially from top to bottom along the axial direction of the inner cylinder heat exchanger baffle, and are divided into several flow channel segments from top to bottom. The annular micro-channels within each flow channel segment are connected in series end to end, and adjacent flow channel segments are connected by a... The flow channels are connected, wherein the annular microchannels in the odd-numbered flow channel segments are arranged counterclockwise, causing the refrigerant to flow counterclockwise in the odd-numbered flow channel segments, and the annular microchannels in the even-numbered flow channel segments are arranged clockwise, causing the refrigerant to flow clockwise in the even-numbered flow channel segments, forming a meandering flow path with alternating counterclockwise and clockwise flow. The refrigerant inlet main channel is connected to the first annular microchannel of the first flow channel segment, and the last annular microchannel of the last flow channel segment is connected to the refrigerant outlet main channel.

4. The water tank of the inner and outer barrel type spiral long water circuit heat pump water heater according to claim 3, characterized in that: The number of flow channel sections is set according to the height of the inner cylinder heat exchange baffle and the heat exchange requirements, and is at least two; the cross-section of the annular microchannel is a square with a side length of less than 1.5mm.

5. The inner and outer barrel type spiral long water circuit heat pump water heater tank according to claim 1, characterized in that: The spiral direction of the spiral spacer is either counterclockwise or clockwise.

6. The inner and outer barrel type spiral long water circuit heat pump water heater tank according to claim 1, characterized in that: A flow meter is installed at the water inlet to detect water flow data; a first temperature sensor, a second temperature sensor, and a third temperature sensor are installed along the water flow direction on the long flow inner tank. The first temperature sensor is located in the upper section of the water flow channel of the outer tank and is used to detect the water temperature of the outer tank in the inlet section. The second temperature sensor is located in the middle section of the water flow channel of the outer tank and is used to detect the water temperature of the middle section of the outer tank. The third temperature sensor is located in the upper section of the water flow channel of the inner tank and is used to detect the water temperature of the end section of the inner tank.

7. The water tank of the inner and outer barrel type spiral long water circuit heat pump water heater according to claim 1, characterized in that: The bottom of the outer barrel is equipped with a drain outlet for cleaning sediment.

8. The water tank of the inner and outer barrel type spiral long water circuit heat pump water heater according to claim 1, characterized in that: The heat pump unit includes a compressor, a fan, a finned evaporator, an electronic throttle, and refrigerant piping. The fan is located on top of the heat pump unit, and an air outlet is provided on the top of the heat pump unit corresponding to the fan's outlet position. The finned evaporator is cylindrical and located on the outer circumference of the heat pump unit. The output end of the finned evaporator is connected to the air inlet of the fan, and the input end is connected to the outside air. A grille air inlet is provided on the outer circumference of the heat pump unit corresponding to the input end of the finned evaporator. The compressor, the electronic throttle, and the refrigerant piping are all located inside the heat pump unit and below the fan. The refrigerant piping connects the compressor, the finned evaporator, and the fan. The evaporator, the electronic throttling device, and the refrigerant channels within the inner cylinder heat exchange baffle are sequentially connected to form a closed refrigerant circulation loop. The compressor is used to compress the low-temperature, low-pressure gaseous refrigerant into a high-temperature, high-pressure gaseous refrigerant and deliver it to the refrigerant channels within the inner cylinder heat exchange baffle. The refrigerant channels are used to exchange heat between the high-temperature, high-pressure gaseous refrigerant and water. After condensing and releasing heat, the high-temperature, high-pressure gaseous refrigerant becomes a high-pressure liquid refrigerant. The electronic throttling device is used to throttle and reduce the pressure of the condensed high-pressure liquid refrigerant into a low-temperature, low-pressure liquid refrigerant. The finned evaporator is used to absorb heat from the outside air and evaporate the throttled, low-pressure liquid refrigerant into a low-temperature, low-pressure gaseous refrigerant and deliver it to the compressor.

9. A dynamic control method for a water tank of an internal and external tank-type spiral long water circuit heat pump water heater, used for the water tank of the internal and external tank-type spiral long water circuit heat pump water heater as described in claim 6, characterized in that... Includes the following steps: S1. Initialization and Safety Detection: Upon initial power-on, the control mechanism reads the temperature values ​​detected by the first, second, and third temperature sensors and determines whether all three temperature values ​​have reached the user-set target temperature T0. If all three have reached the target temperature, the control mechanism keeps the heat pump unit in standby mode and does not start heating. If there is a temperature point that has not reached the target temperature T0, the control mechanism enters the heating preparation program. Before heating starts, the control mechanism checks whether all three temperature values ​​are lower than the preset safe temperature T1. If there is a temperature point that is higher than the safe temperature T1, the control mechanism keeps the heat pump unit in standby mode and waits for the temperature point to drop below the safe temperature T1 before starting heating. S2. Water usage data collection and storage: When the water tank reaches the target temperature T0 for the first time, the control mechanism monitors the water usage data of the flow meter at the inlet in real time. When water usage is detected, recording begins. The water usage period and the corresponding water usage curve are recorded in a preset period S1. The water usage period is divided into hours. The water usage curve records the cumulative water usage and instantaneous water usage in each water usage period. S3. Water Use Feature Factor Extraction: The control mechanism extracts features from the collected water use data, recording and processing the data using five feature factors, as detailed below: Factor 1: 24-hour time period characteristics, dividing the day into peak water usage periods, off-peak water usage periods, and periods of low water usage by hour; Factor 2: Weekday characteristics, recording water usage patterns from Monday to Friday; Factor 3: Weekend characteristics, recording water usage patterns on Saturdays and Sundays; Factor 4: Holiday characteristics, recording water usage patterns during national statutory holidays and user-defined holidays; Factor 5: Seasonal characteristics, recording water usage patterns under different ambient temperatures in the four seasons of spring, summer, autumn, and winter; Based on the above five characteristic factors, the control mechanism constructs a user water demand prediction model using a time series prediction algorithm. The time series prediction algorithm includes, but is not limited to, the ARIMA model, the Prophet model, or the LSTM long short-term memory neural network model. The weight coefficients of each characteristic factor are obtained by training with historical water use data, and a water use curve prediction model is generated in units of 24 hours, weekdays, weekends, holidays, and four seasons. S4. Real-time environmental data acquisition and dynamic heating capacity calculation: The control mechanism acquires the ambient temperature of the user's location in real time through the network module and uses the ambient temperature as factor 7; The control mechanism calculates the dynamic heating capacity at the ambient temperature of the day based on the ambient temperature data of factor 7 and the performance curve of the heat pump host, and uses it as factor 8. The dynamic heating capacity is the product of the rated heating capacity of the heat pump host at a specific ambient temperature and the attenuation coefficient. S5. Adaptive Heating Strategy Formulation: The control mechanism integrates the water demand prediction model constructed by factors 1 to 5, the ambient temperature data of the day by factor 7, and the dynamic heating capacity by factor 8 to make adaptive heating predictions for user hot water demand. This includes the following sub-steps: S51: Based on the water demand prediction model, predict the predicted water consumption V1 for each period in the next 24 hours; S52: Calculate the required hot water reserve V2 based on the predicted water consumption V1, wherein the hot water reserve is equal to the predicted water consumption V1 multiplied by the safety factor x; S53: Calculate the current effective hot water storage capacity V2' based on the temperature values ​​detected by the first temperature sensor, the second temperature sensor, and the third temperature sensor; S54: When the current effective hot water storage V2' is lower than the predicted water consumption V1, calculate the required additional heat value Q, satisfying the following relationship: In the formula, Q represents the required heat value, in J; T0 represents the target temperature set by the user, in °C; T′ represents the average temperature of the current effective hot water, which is calculated by weighted average of the temperature values ​​detected by the first, second, and third temperature sensors, in °C; c represents the specific heat capacity of water, with a value of 4186 J / (kg·°C); ρ represents the density of water, with a value of 1000 kg / m³; V1 represents the predicted water consumption, in m³; and V2′ represents the predicted water consumption, in m³. S55: Calculate the optimal heating start-up time and heating duration based on the required heat value Q, the dynamic heating capacity of the heat pump host, and the predicted water usage period. The optimal heating start-up time ensures that heating is completed before the peak water usage period. The heating duration is equal to the required heat value Q divided by the dynamic heating capacity. S6. Operation control of the heat pump host: The control mechanism generates operation instructions for the heat pump host according to the adaptive heating strategy formulated in step S5. The operation instructions include start / stop instructions and frequency conversion instructions. The control mechanism starts the heat pump host for heating during periods of low water consumption, completes heating before peak water consumption and keeps it in standby mode. When the predicted water consumption is large, the control mechanism controls the heat pump host to operate at high frequency to increase heating capacity. When the predicted water consumption is small, the control mechanism controls the heat pump host to operate at low frequency to reduce energy consumption, thereby achieving on-demand heating. S7. Adaptive Update: After each water usage cycle, the control mechanism compares the actual water usage data with the predicted water usage data, calculates the prediction error, and corrects the model parameters in real time so that the model can continuously adapt to changes in user water usage habits. The control mechanism records the execution effect of each heating strategy, including actual energy consumption, water temperature holding time, and user satisfaction feedback, which are used to optimize the calculation logic of the safety factor x and the start-up timing of the heating strategy.

10. The dynamic control method for the water tank of an inner and outer barrel type spiral long water circuit heat pump water heater according to claim 9, characterized in that: The preset period S1 is 7 days, the target temperature T0 is 55℃, and the safe temperature T1 is 80℃.

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