A water temperature regulating system for an electric water heater

Abstract

The application provides a water temperature adjusting system of an electric water heater, which adjusts the water mixing proportion of a thermostatic valve for the first time according to the current hot water temperature and cold water temperature before the mixed water is output, and immediately outputs the mixed water at the target temperature with the current water mixing proportion when a water switch is opened, so as to shorten the waiting time of a user; meanwhile, in order to avoid the change of the temperature of the mixed water during the output process, the outlet water temperature of the mixed water is detected in real time during the output process of the mixed water, and if the outlet water temperature is inconsistent with the target temperature, the water mixing proportion of the thermostatic valve is adjusted for the second time, so that the outlet water temperature is consistent with the target temperature; meanwhile, the water mixing proportion is adjusted for the first time according to the target temperature, the temperature difference between the outlet water temperature and the target temperature is small, and then the output temperature of the mixed water is close to the target temperature before the water mixing proportion is adjusted for the second time, so that the use experience is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of thermostatic valve regulating water temperature, in particular to a water temperature regulating system of an electric water heater. BACKGROUND

[0002] The traditional water heater has the problem of water temperature changing from cold to hot due to pressure change and temperature change during bathing. The existing technology controls the outlet water temperature through a thermostatic valve, adjusts the mixing ratio of cold and hot water, ensures that the outlet water temperature is constant within the preset range, improves user experience and achieves the effect of energy saving and environmental protection. For the mixing ratio of cold and hot water, the existing technology only collects the outlet water temperature and adjusts the water temperature according to the outlet water temperature.

[0003] As disclosed in the patent literature with Chinese application number 202011353459.1 and publication date of February 12, 2021, an intelligent temperature control valve and its water temperature regulating method are disclosed, which controls the output of mixed cold and hot water through a valve core, collects the water temperature data of the outlet, compares whether the outlet water temperature is consistent with the target temperature, and adjusts the mixing ratio. In this method, the water temperature can only be collected after the valve is opened, the mixing ratio is calculated after the valve is opened, and then the water temperature is adjusted. The user needs to wait for a long time to get hot water at the target temperature. Since the water temperature is not adjusted when the water is output, the temperature difference between the outlet water temperature and the target temperature is large during the waiting period for water temperature adjustment, and the user experience is poor. This method cannot obtain the available time of the remaining hot water at the target temperature, so the user does not know the continuous use time of the hot water. SUMMARY

[0004] Therefore, the purpose of the present application is to provide a water temperature regulating system of an electric water heater, which adjusts the mixing ratio of a thermostatic valve for the first time before the mixed water is output, and immediately outputs mixed water at the target temperature with the current mixing ratio when the water use switch is opened, thereby shortening the waiting time of the user.

[0005] To solve the above technical problems, the technical solution used by the present application is:

[0006] The water temperature regulating method according to the present application comprises the following steps:

[0007] S1, preset a target temperature.

[0008] S2, detect the hot water temperature and the cold water temperature, and adjust the mixing ratio of the thermostatic valve according to the target temperature, the current hot water temperature and the current cold water temperature.

[0009] S3, after opening the water use switch, the hot water and the cold water are mixed at the current mixing ratio and output mixed water.

[0010] S4, detecting the outlet water temperature of the mixed water, judging whether the outlet water temperature is consistent with the target temperature, if yes, judging that the water temperature adjustment is completed, if no, adjusting the mixed water proportion of the thermostatic valve to make the outlet water temperature consistent with the target temperature.

[0011] S5, judging whether the hot water temperature is greater than the current target temperature, if no, prompting the user that the hot water is insufficient, if yes, performing S6;

[0012] S6, calculating the sustainable output time of the mixed water under the current target temperature, and prompting the user.

[0013] Preferably, S4 further comprises judging whether the user modifies the target temperature, if no, the thermostatic valve continues to output the mixed water, if yes, adjusting the mixed water proportion of the thermostatic valve to make the outlet water temperature consistent with the modified target temperature.

[0014] Preferably, S6 further comprises that after the water switch is closed, the thermostatic valve keeps the current mixed water proportion, and the current target temperature and the current mixed water proportion of the thermostatic valve are sent to the storage area for storage.

[0015] Preferably, S3 further comprises presetting a variation threshold of the hot water temperature, detecting the hot water temperature again, if the temperature variation of the hot water temperature is greater than the temperature threshold, adjusting the mixed water proportion of the thermostatic valve according to the target temperature, the current hot water temperature and the current cold water temperature.

[0016] Preferably, the variation threshold is 5 DEG C.

[0017] Preferably, the calculation method of the sustainable output time of the mixed water comprises:

[0018] A1, determining the total energy of the hot water;

[0019] A2, calculating the energy consumption of the hot water per minute;

[0020] A3, calculating the sustainable use time of the hot water by the total energy of the hot water and the energy consumption of the hot water per minute.

[0021] The application further provides a water temperature adjustment system of an electric water heater, comprising a thermostatic valve and a control system, the thermostatic valve is arranged on the electric water heater, the thermostatic valve comprises a thermostatic valve body and a thermostatic valve core with a mixed water cavity, the control system drives a stepping motor to act to adjust the mixed water proportion of the thermostatic valve core.

[0022] The thermostatic valve body is provided with a cold water inlet, a mixed water outlet, a hot water inlet, a cold water outlet, a first insulated water path and a second insulated water path, the first insulated water path is communicated with the cold water inlet, the cold water outlet and a water inlet of the thermostatic valve core, the second insulated water path is communicated with the hot water inlet and another water inlet of the thermostatic valve core, the two water inlets of the thermostatic valve core are communicated with the mixed water cavity and the mixed water outlet, the cold water inlet is connected with a cold water source, the cold water outlet is connected with a water inlet of the electric water heater, and the hot water inlet is connected with a water outlet of the electric water heater, a part of the cold water is input into the mixed water cavity of the thermostatic valve through the first insulated water path, a part of the cold water is input into the mixed water cavity of the thermostatic valve through the second insulated water path after being heated by the electric water heater, and the cold water and the hot water are mixed in the mixed water cavity of the thermostatic valve and then output through the mixed water outlet, before the mixed water is output, the control system collects the mixed water proportion of the thermostatic valve according to the hot water temperature and the cold water temperature, and when the mixed water is output, the control system compares the mixed water outlet temperature with the target temperature of the mixed water to control the mixed water proportion of the thermostatic valve.

[0023] Preferably, the control system comprises a processor, an outlet water temperature sensor, an outlet water flow sensor, an inlet water flow sensor, an inlet water temperature sensor, a hot water temperature sensor and a display.

[0024] The outlet water temperature sensor and the outlet water flow sensor are arranged inside the mixed water outlet, the outlet water temperature sensor is used for collecting the outlet water temperature of the mixed water, and the outlet water flow sensor is used for collecting the output flow of the mixed water.

[0025] The inlet water flow sensor and the inlet water temperature sensor are arranged at the water inlet of the electric water heater, and the hot water temperature sensor is arranged at the water outlet of the electric water heater, the inlet water temperature sensor is used for collecting the cold water temperature, the hot water temperature sensor is used for collecting the hot water temperature in the electric water heater, and the display is arranged on the electric heater.

[0026] The processor is in signal connection with the inlet water temperature sensor, the inlet water flow sensor, the hot water temperature sensor, the outlet water temperature sensor, the outlet water flow sensor and the display, the processor outputs a signal to drive the stepping motor to act, and the display is used for displaying the sustainable output time of the mixed water at the current target temperature.

[0027] Preferably, the first insulated water path and the second insulated water path are each provided with more than one, the adjacent first insulated water paths are communicated with each other, and the adjacent second insulated water paths are communicated with each other.

[0028] Preferably, a first partition is arranged in the first insulated water path, the first partition divides the first insulated water path into two first channels, and the diameter of the first channel is smaller than that of the first insulated water path, and a second partition is arranged in the second insulated water path, the second partition divides the second insulated water path into two second channels, and the diameter of the second channel is smaller than that of the second insulated water path.

[0029] The beneficial effects of the water temperature adjusting method according to the present application mainly include: before the mixed water is output, the mixed water proportion of the thermostatic valve is adjusted for the first time according to the current hot water temperature and cold water temperature, and the mixed water at the target temperature is immediately output at the current mixed water proportion when the water switch is opened, so as to shorten the waiting time of the user; at the same time, in order to avoid the change of the temperature of the mixed water during the output process, the outlet water temperature of the mixed water is detected in real time during the output process of the mixed water, and if the outlet water temperature is inconsistent with the target temperature, the mixed water proportion of the thermostatic valve is adjusted for the second time, so that the outlet water temperature is consistent with the target temperature; at the same time, the mixed water proportion is adjusted for the first time according to the target temperature, the temperature difference between the outlet water temperature and the target temperature is small, and then before the mixed water proportion is adjusted for the second time, the output temperature of the mixed water is close to the target temperature, so as to improve the use experience.

[0030] By calculating the sustainable output time of the mixed water, the user can clearly know the remaining use time of the mixed water at the current target temperature and flow rate, so as to further improve the use experience.

[0031] If the target temperature is modified during use, the mixed water proportion of the thermostatic valve is re-adjusted, so as to meet different adjusting requirements.

[0032] By monitoring the temperature change of the hot water, the mixed water proportion of the thermostatic valve is adjusted, so as to avoid the influence of the temperature change of the hot water on the temperature of the mixed water; and the temperature of the mixed water is consistent with the target temperature.

[0033] Compared with the prior art, the water temperature adjusting method according to the present application adjusts the mixed water proportion of the thermostatic valve for the first time before the mixed water is output, and the mixed water at the target temperature is immediately output at the current mixed water proportion when the water switch is opened, so as to shorten the waiting time of the user.

[0034] The beneficial effects of the water temperature adjusting system of the electric water heater according to the present application mainly include: the first insulating water path and the second insulating water path are arranged to respectively convey cold water and hot water, and a part of the cold water enters the electric water heater to heat the hot water in the electric water heater, so as to prolong the use time of the mixed water; at the same time, the mixed water proportion is adjusted according to the current hot water temperature and cold water temperature before the mixed water is output, so as to shorten the waiting time of the user; and the mixed water proportion is adjusted for the second time according to the current outlet water problem when the mixed water is output, so that the outlet water temperature is consistent with the target temperature. By arranging more than one first insulating water path, the inlet amount of the cold water is increased; by arranging more than one second insulating water path, the inlet amount of the hot water is increased. The first channel is formed to accelerate the flow rate of the cold water, and the second channel is formed to accelerate the flow rate of the hot water. BRIEF DESCRIPTION OF DRAWINGS

[0035] The above and other objects, features and advantages of the present application will become more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which: Like reference numerals are used to refer to like elements throughout. And, as used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. Further, to the extent that the Figures illustrate diagrams, the

[0036] Figure 1 A perspective view of the thermostatic valve according to the present application.

[0037] Figure 2 An exploded view of the thermostatic valve according to the present application.

[0038] Figure 3 A sectional view of the thermostatic valve according to the present application.

[0039] Figure 4 A schematic view of the thermostatic valve according to the present application with the thermostatic valve core removed.

[0040] Figure 5 A schematic view of the thermostatic valve according to the present application with the plug removed.

[0041] Figure 6 A schematic view of the thermostatic valve according to the present application installed in an electric water heater.

[0042] Figure 7 A flow chart of the water temperature adjustment method of the electric water heater according to the present application.

[0043] Figure 8 A schematic block diagram of the water temperature adjustment system of the electric water heater according to the present application. BRIEF DESCRIPTION OF DRAWINGS

[0045] Thermostatic valve 1, thermostatic valve body 11, thermostatic valve core 12, stepper motor 13, sealing gasket 14 with water passage hole, sealing gasket 15, hard flat gasket 16, plug 17, cold water end 118, hot water end 117, cold water inlet 111, mixed water outlet 112, hot water inlet 113, cold water outlet 114, first insulated water passage 115, second insulated water passage 116, hot water end 117, cold water end 118, valve core base 120, motor support 130.

[0046] Control system 2, processor 21, water inlet flow sensor 22, water inlet temperature sensor 23, hot water temperature sensor 24, water outlet temperature sensor 25, water outlet flow sensor 26, display 27, upper computer 28.

[0047] Electric water heater 3. DETAILED DESCRIPTION

[0048] The technical solutions of the present application will be described in further detail below with reference to the drawings and specific embodiments, so that those skilled in the art can better understand the present application and implement it. However, the embodiments are not intended to limit the present application. In the embodiments, it should be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0049] It should be noted that when an element is considered to be "connected" to another element, it can be directly connected to the other element and integrated as a whole, or a middle element can exist at the same time. The terms "mount", "one end", "the other end" and the like used in the present application are only for the purpose of illustration.

[0050] A water temperature regulating system, as shown in the figure, comprises a thermostatic valve 1 and a control system 2, the thermostatic valve 1 is arranged to be used on an electric water heater 3, and the control system 2 is used to regulate the water mixing ratio of the thermostatic valve 1. Figures 1-7

[0051] The thermostatic valve 1 comprises a thermostatic valve body 11, a thermostatic valve core 12 with a water mixing cavity and a stepper motor 13. The thermostatic valve body 11 is provided with a cold water inlet 111, a water mixing outlet 112, a hot water inlet 113, a cold water outlet 114, a first insulated water path 115 and a second insulated water path 116. The thermostatic valve body 11 is made of insulating material, and the insulated thermostatic valve body 11 realizes the performance of electric wall protection, and is safe; in a preferred embodiment, the thermostatic valve body 11 is made of rubber.

[0052] The first insulated water path 115 is communicated with the cold water inlet 111, the cold water outlet 114 and one water inlet of the thermostatic valve core 12; the second insulated water path 116 is communicated with the hot water inlet 113 and the other water inlet of the thermostatic valve core 12; the two water inlets of the thermostatic valve core 12 are communicated with the water mixing cavity and the water mixing outlet 112.

[0053] The cold water inlet 111 is connected with a cold water source (not shown in the figure), the cold water outlet 114 is connected with the water inlet of the electric water heater 3, the hot water inlet 113 is connected with the water outlet of the electric water heater 3, a part of the cold water is input into the water mixing cavity of the thermostatic valve 1 through the first insulated water path 115, a part of the cold water is input into the electric water heater 3 for heating and then input into the water mixing cavity of the thermostatic valve 1 through the second insulated water path 116, and the cold water and the hot water are mixed in the water mixing cavity of the thermostatic valve 1 and then output through the water mixing outlet.

[0054] ​The first and second insulation water channels 115 and 116 are respectively provided with one or more than one, and the adjacent first insulation water channels 115 are communicated with each other; the adjacent second insulation water channels 116 are communicated with each other. By providing one or more than one first insulation water channel 115, the water inflow of cold water is increased; by providing one or more than one second insulation water channel 116, the water inflow of hot water is increased.

[0055] In a preferred embodiment, a first partition 1152 is arranged in the first insulation water channel 115, and the first partition 1152 divides the first insulation water channel 115 into two first passages 1153, and the diameter of the first passage 1153 is smaller than that of the first insulation water channel 115, so that the flow rate of cold water is increased.

[0056] Referring to Figure 4 In a preferred embodiment, a second partition 62 is arranged in the second insulation water channel 116, and the second partition 62 divides the second insulation water channel 116 into two second passages 63, and the diameter of the second passage 63 is smaller than that of the second insulation water channel 116, so that the flow rate of hot water is increased.

[0057] The hot water end 117 of the thermostatic valve body 11 is bolted and compressedly sealed by the motor support 130, and a water channel hole sealing gasket 14 is arranged between the hot water end 117 and the motor support 130, the thermostatic valve core 12 is located between the water channel hole sealing gasket 14 and the motor support 130, one end of the thermostatic valve core 12 close to the water channel hole sealing gasket 14 is provided with a valve core base 120, two water inlets of the thermostatic valve core 12 are arranged close to the water channel hole sealing gasket 14, a through hole is arranged on the valve core base 120, and the through hole is communicated with the water inlets of the thermostatic valve core 12 and the water channel hole of the water channel hole sealing gasket 14. The rotating shaft of the stepping motor 13 passes through the motor support 130 and is connected with the thermostatic valve core 12; the rotating shaft of the stepping motor 13 is concentrically assembled with the rotating shaft of the thermostatic valve core 12; the stepping motor adjusts the water mixing ratio of the thermostatic valve core, which is not repeated here.

[0058] In a preferred embodiment, the cold water end 118 of the thermostatic valve body 11 is threadedly connected with the plug cover 17, and the sealing gasket 15 and the hard flat gasket 16 are arranged between the cold water end 118 and the plug cover 17, and the sealing is realized by the sealing gasket 15, the hard flat gasket 16 and the plug cover 17, so that the outflow of cold water is avoided.

[0059] The electric water heater 3 is a prior art electric water heater, which comprises an inner container (not shown in the figure), a control circuit (not shown in the figure) and a heat preservation layer (not shown in the figure), and a heating pipe (not shown in the figure) is arranged in the inner container; the water inlet of the electric water heater 3 is the water inlet of the inner container, the water outlet of the electric water heater 3 is the water outlet of the inner container, and the hot water inlet 113 and the cold water outlet 114 are respectively connected with the inner container of the electric water heater 3.

[0060] The control system comprises a processor 21, a display 27, an upper computer 28, a water inflow sensor 22 and a water inflow temperature sensor 23 arranged at the water inflow of the electric water heater 3, a hot water temperature sensor 24 arranged at the water outflow of the electric water heater 3, a water outflow temperature sensor 25 and a water outflow sensor 26 arranged inside the mixed water outlet 112.

[0061] The processor 21 is signal connected with the water inflow sensor 22, the water inflow temperature sensor 23, the hot water temperature sensor 24, the water outflow temperature sensor 25, the water outflow sensor 26, the display 27 and the upper computer 28 respectively.

[0062] The water inflow sensor 22 is used for collecting the cold water inflow amount input to the inner container; the water inflow temperature sensor 23 is used for collecting the temperature of the cold water; the hot water temperature sensor 24 is used for collecting the temperature of the hot water stored in the inner container. The water outflow temperature sensor 25 is used for collecting the mixed water outflow temperature; the water outflow sensor 26 is used for collecting the mixed water output flow. The processor 21 receives the hot water temperature data, the cold water temperature data, the mixed water outflow temperature data and the target temperature data to adjust the mixed water proportion of the thermostatic valve.

[0063] The display 17 is arranged in the electric water heater 3, and the display 17 is used for displaying the sustainable output time of the mixed water at the current target temperature, and the upper computer is used for inputting the target temperature.

[0064] The water temperature adjusting method comprises the following steps:

[0065] S1, presetting a target temperature.

[0066] S2, a part of the cold water is input to the mixed water cavity of the thermostatic valve 1 through the first insulated water path, and a part of the cold water is input to the mixed water cavity of the thermostatic valve 1 through the second insulated water path after being heated by the electric water heater through the cold water outlet; the hot water temperature and the cold water temperature are detected, and the mixed water proportion of the thermostatic valve 1 is adjusted according to the target temperature, the current hot water temperature and the current cold water temperature. Specifically, the cold water temperature is detected by the water inflow temperature sensor 23, and the hot water temperature is detected by the hot water temperature sensor 24.

[0067] S2.1, presetting a change threshold of the hot water temperature, detecting the hot water temperature again, if the temperature change of the hot water temperature is greater than the temperature threshold, then the mixed water proportion of the thermostatic valve 1 is adjusted again according to the target temperature, the current hot water temperature and the current cold water temperature. In this embodiment, the change threshold is 5℃. In order to prolong the extension time of the mixed water, a part of the cold water is input to the electric heater to heat and supplement the hot water; when the cold water is input, the temperature of the hot water in the electric water heater changes; in order to keep the accuracy of the mixed water temperature, the mixed proportion is adjusted according to the change temperature of the hot water.

[0068] S3, after opening the water switch, hot water and cold water are mixed and outputted according to the current mixing ratio.

[0069] S4, detecting the current output water temperature, judging whether the output water temperature is consistent with the target temperature, if yes, judging that the water temperature adjustment is completed; if no, adjusting the mixing ratio of the thermostatic valve 1 to make the output water temperature consistent with the target temperature.

[0070] judging whether the user modifies the target temperature, if no, the thermostatic valve 1 continues to output mixed water; if yes, adjusting the mixing ratio of the thermostatic valve 1 to make the output water temperature consistent with the modified target temperature.

[0071] S5, judging whether the hot water temperature is greater than the current target temperature, if no, prompting the user that the hot water is insufficient; if yes, proceeding to S6;

[0072] S6, calculating the sustainable output time of mixed water at the current target temperature and prompting the user. In the embodiment, the processor sends the sustainable output time of mixed water at the current target temperature to the display for display. After closing the water switch, the thermostatic valve 1 keeps the current mixing ratio, and the data of the current target temperature and the current mixing ratio of the thermostatic valve 1 are sent to the storage area for storage.

[0073] In the above method,

[0074] Adjusting the mixing ratio of the thermostatic valve 1 specifically includes that the processor sends corresponding pulse signals to the stepper motor. If the output water temperature is lower than the target temperature, the controller sends forward pulse signals to make the stepper motor drive the valve core to rotate in the direction of increasing the hot water ratio; otherwise, if the output water temperature is higher than the target temperature, the controller sends reverse pulse signals to reduce the hot water ratio.

[0075] The calculation method of the sustainable output time of mixed water;

[0076] A1, determining the total energy of hot water. In the embodiment, the total energy of hot water is calculated according to the mass of hot water, the specific heat capacity of per unit mass of hot water, and the temperature change of hot water;

[0077] A2, calculating the energy consumption of hot water per minute. In the embodiment, the energy consumption of hot water per minute is calculated according to the target temperature of mixed water, the output flow of mixed water, and the mixing ratio of the thermostatic valve 1.

[0078] A3, calculating the sustainable use time of hot water according to the total energy of hot water and the energy consumption of hot water per minute. Specifically, the sustainable use time of hot water = the total energy of hot water / the energy consumption of hot water per minute.

[0079] The method, before outputting the mixed water, adjusts the water mixing ratio of the thermostatic valve 1 according to the current hot water temperature and cold water temperature for the first time, and immediately outputs the mixed water at the target temperature at the current water mixing ratio when the water switch is opened, thereby shortening the waiting time of the user; at the same time, in order to avoid the change of the temperature of the mixed water during the output process, the outlet water temperature of the mixed water is detected in real time during the output process of the mixed water, and if the outlet water temperature is inconsistent with the target temperature, the water mixing ratio of the thermostatic valve 1 is adjusted for the second time, so that the outlet water temperature is consistent with the target temperature; at the same time, the first adjustment of the water mixing ratio is carried out according to the target temperature, the temperature difference between the outlet water temperature and the target temperature is small, and then before the second adjustment of the water mixing ratio is carried out, the output temperature of the mixed water is close to the target temperature, thereby improving the use experience.

[0080] By calculating the sustainable output time of the mixed water, the user can clearly know the remaining use time of the mixed water at the current target temperature and flow, thereby further improving the use experience.

[0081] If the target temperature is modified during use, the water mixing ratio of the thermostatic valve 1 is re-adjusted, so that different adjustment requirements can be met.

[0082] In order to prolong the extension time of the mixed water, a part of the cold water is input into the electric heater to heat and supplement the hot water; when the cold water is input, the temperature of the hot water in the electric heater changes; in order to keep the temperature of the mixed water accurate, the water mixing ratio of the thermostatic valve 1 is adjusted by monitoring the temperature change of the hot water, so that the temperature change of the hot water does not affect the temperature of the mixed water; and the temperature of the mixed water is consistent with the target temperature.

[0083] In the present specification, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0084] In the description of the specification, the description using the terms "preferred embodiment", "still another embodiment", "other embodiments", "specific example" or the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the specification, the illustrative expressions of the above terms are not necessarily directed to the same embodiment or example. Also, the specific features, structures, materials or characteristics described can be combined in an appropriate manner in any one or more embodiments or examples. In addition, the person skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of the different embodiments or examples, without contradiction.

[0085] Although the embodiments of the present application have been shown and described above, it is understood that the above-described embodiments are exemplary and are not to be construed as limiting the present application, and the person skilled in the art can make changes, modifications, replacements and variations to the above-described embodiments within the scope of the present application.

Claims

1. A water temperature regulation system for an electric water heater, characterized in that: The system includes a thermostatic valve and a control system. The thermostatic valve is installed on the electric water heater. The thermostatic valve includes a thermostatic valve body and a thermostatic valve core with a mixing chamber. The control system drives a stepper motor to adjust the mixing ratio of the thermostatic valve core. The thermostatic valve body is provided with a cold water inlet, a mixing outlet, a hot water inlet, a cold water outlet, a first insulated water path, and a second insulated water path. The first insulated water path is connected to the cold water inlet, the cold water outlet, and one inlet of the thermostatic valve core. The second insulated water path is connected to the hot water inlet and the other inlet of the thermostatic valve core. The two inlets of the thermostatic valve core are connected to the mixing chamber and the mixing outlet. The cold water inlet is connected to a cold water source, the cold water outlet is connected to the inlet of an electric water heater, and the hot water inlet is connected to the outlet of an electric water heater. A portion of the cold water is input into the mixing chamber of the thermostatic valve through the first insulated water path, and a portion of the cold water is input into the electric water heater through the cold water outlet, heated, and then input into the mixing chamber of the thermostatic valve through the second insulated water path. The cold water and hot water are mixed in the mixing chamber of the thermostatic valve and then output through the mixing outlet. Before the mixed water is output, the control system collects the hot water temperature and cold water temperature to determine the mixing ratio of the thermostatic valve. When the mixed water is output, the control system compares the outlet temperature of the mixed water with the target temperature of the mixed water to determine the mixing ratio of the thermostatic valve. The method for adjusting the water temperature of an electric water heater includes the following steps: S1, preset target temperature; S2. Detect the hot water temperature and cold water temperature, and adjust the mixing ratio of the thermostatic valve according to the target temperature, the current hot water temperature and the current cold water temperature; S3. After turning on the water switch, hot and cold water are mixed in the current mixing ratio and the mixed water is output. S4. Detect the current outlet temperature of the mixed water and determine whether the outlet temperature is consistent with the target temperature. If yes, the water temperature adjustment is considered complete; otherwise, adjust the mixing ratio of the thermostatic valve to make the outlet temperature consistent with the target temperature. S5. Determine if the hot water temperature is higher than the current target temperature. If not, prompt the user that the hot water supply is insufficient; if yes, proceed to S6. S6. Calculate the sustainable output time of the mixed water at the current target temperature and prompt the user.

2. The water temperature regulation system for an electric water heater according to claim 1, characterized in that: The control system includes a processor, an outlet water temperature sensor, an outlet water flow sensor, an inlet water flow sensor, an inlet water temperature sensor, a hot water temperature sensor, and a display. Both the outlet water temperature sensor and the outlet water flow sensor are located inside the mixing outlet; the outlet water temperature sensor is used to collect the outlet water temperature of the mixed water; the outlet water flow sensor is used to collect the output flow rate of the mixed water. Both the inlet water flow sensor and the inlet water temperature sensor are located at the inlet of the electric water heater, while the hot water temperature sensor is located at the outlet of the electric water heater. The inlet water temperature sensor is used to collect the cold water temperature, and the hot water temperature sensor is used to collect the hot water temperature inside the electric water heater. The display is located on the electric water heater. The processor is connected to the inlet water temperature sensor, inlet water flow sensor, hot water temperature sensor, outlet water temperature sensor, outlet water flow sensor, and display. The processor outputs a signal to drive the stepper motor. The display shows the continuous output time of the mixed water at the current target temperature.

3. The water temperature regulation system for an electric water heater according to claim 1, characterized in that: The first insulating water channel and the second insulating water channel are each provided with one or more, and adjacent first insulating water channels are interconnected; adjacent second insulating water channels are interconnected.

4. The water temperature regulation system for an electric water heater according to claim 3, characterized in that: A first insulating water channel is provided with a first separator, which divides the first insulating water channel into two first channels, the diameter of which is smaller than the diameter of the first insulating water channel; a second insulating water channel is provided with a second separator, which divides the second insulating water channel into two second channels, the diameter of which is smaller than the diameter of the second insulating water channel.

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