Efficient and energy-saving water storage tank sterilization method and device

Abstract

The invention discloses an efficient and energy-saving water storage tank sterilization method and device, and relates to the technical field of water dispensers. In the water storage tank sterilization process, a sterilization calculation unit and a control unit are arranged, the real-time water level value of a water tank is detected through a water level sensor, and the newly-added water volume V is calculated; the sterilization duration t of the UV sterilizer is calculated by adopting a formula according to the newly added water quantity, the control unit controls the UV sterilizer to conduct sterilization operation according to the sterilization duration, and due to the fact that the sterilization duration is calculated and controlled according to the newly added water quantity, water in the water tank can reach the standard of drinking water, the service time of the UV sterilization lamp is shortened, the service life is prolonged, and energy conservation and high efficiency are achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water dispensers, and particularly relates to a high-efficiency and energy-saving water tank sterilization method and device. BACKGROUND

[0002] Water in a water tank is usually stored for a long time, and bacteria may breed in the water tank, affecting health. In order to reach the drinking water standard, ultraviolet rays of a UV sterilizer are used to inhibit the growth of bacteria in the water tank. However, long-time operation of the sterilizer may reduce the service life of the sterilizer, cause damage to the sterilizer, increase the use cost, and increase energy consumption.

[0003] At present, the following problems exist in the use mode of most water tank sterilization technologies.

[0004] 1. The sterilization lamp is continuously turned on for 24 hours for sterilization, which may cause the sterilizer to work for a long time, reduce the service life of the sterilizer, reduce the sterilization effect, and increase the maintenance cost.

[0005] 2. The state of the water inlet valve is combined to determine whether the water tank is replenished with water, so as to control whether the sterilization lamp is turned on. When the valve is closed, the sterilization lamp is also turned off, which may cause the sterilization effect to be insufficient and fail to reach the drinking water standard.

[0006] 3. In a static water tank, liquid does not flow, and the sterilizer cannot start the sterilization action on deep water. SUMMARY

[0007] The present application aims to provide a high-efficiency and energy-saving water tank sterilization method and device, reduce the working time of the sterilizer, prolong the service life of the sterilizer, reduce energy consumption, and enable the sterilizer to work more efficiently and energy-savingly.

[0008] To solve the above technical problems, the present application provides a high-efficiency and energy-saving water tank sterilization device, which comprises a UV sterilizer, a water level sensor, a sterilization calculation unit and a control unit arranged in a water tank. The water level sensor is used to detect the real-time water level value of the water tank and calculate the added water volume V. The sterilization calculation unit is used to calculate the sterilization time t of the UV sterilizer according to the added water volume by using formula (1). The control unit is connected with the UV sterilizer, the water level sensor and the sterilization calculation unit, and is used to control the sterilization operation of the UV sterilizer according to the sterilization time.

[0009] wherein, (1);

[0010] is a target dose, is an effective UV power of the UV sterilizer, is a wavelength correction coefficient, k is a system constant.

[0011] The control unit further comprises a second sterilization unit, which is configured to sterilize all water in the water tank when the sterilization time is longer than the predetermined time.

[0012] The control unit further comprises a parameter setting unit, which is configured to set the target dose, the effective UV power, the wavelength correction coefficient, the quartz sleeve transmittance, and the system constant.

[0013] The water tank further comprises a stirrer, which is configured to stir the water in the water tank to make the water circulate.

[0014] The control unit, the parameter setting unit, the UV sterilizer, and the water level sensor are connected to a display panel, which is configured to display the real-time water level value, the added water volume, the UV power, the target dose, the effective UV power, the wavelength correction coefficient, the quartz sleeve transmittance, the system constant, and the running speed and time of the stirrer.

[0015] The water level sensor can be a water level probe, a float type liquid level transmitter, a magnetic liquid level transmitter, a drop-in liquid level transmitter, or an electrically driven internal float liquid level transmitter.

[0016] In addition, the embodiment of the present application also provides a high-efficiency and energy-saving water tank sterilization method, which comprises the following steps:

[0017] S1: determining whether the water tank is refilled;

[0018] If yes, S2: calculating the sterilization operation time of the added water volume according to formula (1) and performing sterilization operation according to the water refilling volume of the water tank; if no, S3: determining whether the time from the current water tank to the last sterilization operation is longer than the predetermined time; if yes, S4: calculating the overall sterilization time according to formula (1) according to the sterilization of all water in the water tank and performing overall sterilization operation.

[0019] wherein, (1);

[0020] the target dose, the effective UV power of the UV sterilizer, the wavelength correction coefficient, is the quartz sleeve transmittance, k is a system constant, and V is the volume of water corresponding to the sterilization.

[0021] wherein, after the S2 or the S4, further comprising:

[0022] Turning on the agitator in the water tank to perform an agitating operation on the water in the water tank, so that the water in the water tank flows in a circulating manner.

[0023] wherein, before the S1, further comprising:

[0024] Setting the target dose, the effective UV power, the wavelength correction coefficient, the quartz sleeve transmittance, and the system constant.

[0025] wherein, after the S2 or the S4, further comprising:

[0026] Displaying the real-time water level value, the added water volume, the UV power, the target dose, the effective UV power, the wavelength correction coefficient, the quartz sleeve transmittance, and the system constant, and the running speed and duration of the agitator.

[0027] The high-efficiency and energy-saving water tank sterilization method and device provided by the embodiments of the present application have the following advantages compared with the prior art:

[0028] The high-efficiency and energy-saving water tank sterilization method and device provided by the embodiments of the present application have the following advantages compared with the prior art: BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0030] Fig. 1 The structure diagram of one embodiment of the high-efficiency and energy-saving water tank sterilization device provided by the present application;

[0031] Fig. 2A step flow structure schematic diagram of one embodiment of the high-efficiency and energy-saving water tank sterilization method provided by the application;

[0032] Among them, 1 is a water tank, 2 is a stirrer, 3 is a water level probe, 4 is a UV sterilizer, and 5 is a water inlet. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the application.

[0034] Please refer to Figs. 1-2 , Fig. 1 A structure schematic diagram of one embodiment of the high-efficiency and energy-saving water tank sterilization device provided by the application; Fig. 2 A step flow structure schematic diagram of one embodiment of the high-efficiency and energy-saving water tank sterilization method provided by the application.

[0035] In one specific embodiment, the high-efficiency and energy-saving water tank sterilization device comprises a UV sterilizer 4, a water level sensor, a sterilization calculation unit and a control unit arranged in the water tank 1. The water level sensor is used to detect the real-time water level value of the water tank 1 and calculate the new water volume V. The sterilization calculation unit is used to calculate the sterilization time t of the UV sterilizer 4 according to the new water volume by using formula (1). The control unit is connected with the UV sterilizer 4, the water level sensor and the sterilization calculation unit, and is used to control the sterilization operation of the UV sterilizer 4 according to the sterilization time.

[0036] Among them, (1);

[0037] The target dose is, The effective UV power of the UV sterilizer is, The wavelength correction coefficient is, The quartz sleeve transmittance is k, and k is a system constant.

[0038] In the sterilization process of the water tank 1, the sterilization calculation unit and the control unit are arranged. The water level sensor detects the real-time water level value of the water tank 1 and calculates the new water volume V. The sterilization time t of the UV sterilizer 4 is calculated according to the new water volume by using formula. The control unit controls the sterilization operation of the UV sterilizer 4 according to the sterilization time. Since the sterilization time is calculated and controlled according to the new water volume, the water in the water tank 1 can reach the standard of drinking water, the use time of the UV sterilization lamp is reduced, the service life is prolonged, and the energy saving is high.

[0039] The above is mainly for disinfection when new water is injected, and in the case of no new water injection, if the storage time is long enough, disinfection is also needed to achieve safe drinking water. In an embodiment, the high-efficiency and energy-saving water storage tank 1 disinfection device further comprises a second disinfection unit connected to the control unit, which is used to detect the time length of disinfection that exceeds the predetermined time length, and to disinfect all the water in the water tank 1. The overall disinfection time is calculated according to formula (1), and the control unit controls the UV disinfection device 4 to perform overall disinfection operation according to the overall disinfection time.

[0040] By detecting the time length of the last disinfection, automatic disinfection operation is performed after a certain time length to ensure the reliability of drinking water.

[0041] The interval time without new water injection in this application is not limited, which can be freely set or set based on the last disinfection time, etc. For example, it can be timed disinfection every hour, or the last disinfection time is 5 minutes, and the disinfection time of the next interval of half an hour is also 5 minutes. If the last disinfection time is 10 minutes, the interval disinfection time can be increased to 50 minutes, or even one hour, etc. to achieve safe drinking water protection, etc.

[0042] In order to increase the flexibility of the equipment, the parameters are flexibly set according to different needs and equipment types. In an embodiment, the high-efficiency and energy-saving water storage tank 1 disinfection device further comprises a parameter setting unit connected between the water tank 1 and the control unit, which is used to set the target dose, the effective UV power, the wavelength correction coefficient, the quartz sleeve transmittance, and the system constant.

[0043] By freely setting various parameters, different disinfection needs and different UV disinfection device 4 equipment can be freely set to improve the accuracy of disinfection and reduce the use time.

[0044] The parameter setting method in this application is not limited, which can be achieved by actively inputting numbers to the parameters, or by using automatic import, or by remote automatic input, or by automatically importing parameters after equipment recognition, or by using other parameter import, etc.

[0045] Further, in order to improve the management efficiency, in an embodiment, the high-efficiency and energy-saving water tank 1 sterilization device further comprises a display panel connected with the control unit, the parameter setting unit, the UV sterilizer 4 and the water level sensor, for displaying the real-time water level value, the added water volume, the UV power, the target dose, the effective UV power, the wavelength correction coefficient, the quartz sleeve transmittance and the system constant, and the running speed and time length of the agitator 2.

[0046] Through the display panel, the parameter display during the device running process and the parameter display during the parameter setting process are realized, and the management efficiency is improved.

[0047] The structure and display mode of the display panel are not limited in the present application.

[0048] Further, in order to improve the sterilization efficiency and avoid the insufficient sterilization effect due to the limited processing range of the UV sterilizer 4, in an embodiment, the high-efficiency and energy-saving water tank 1 sterilization method and device further comprises an agitator 2 arranged in the water tank 1, for stirring the water in the water tank 1 to make the water in the water tank 1 flow in a circulation mode.

[0049] Through the stirring of the agitator 2, the water in the water tank 1 flows in a circulation mode, so that all the water flows into the sterilization range of the UV sterilizer 4 through the circulation flow, and the water in the specified range is sterilized and disinfected efficiently.

[0050] The structure and control mode of the agitator 2 are not limited in the present application, and a general agitator or an agitator pump can be used.

[0051] In the present application, the water level sensor is used for liquid level detection, and the structure thereof is not limited. The water level sensor can be a water level probe 3, a floating ball type liquid level transmitter, a magnetic liquid level transmitter, a drop-in type liquid level transmitter or an electrically driven internal floating ball liquid level transmitter, or other types of water level sensors.

[0052] The structure, type and installation mode of the water level sensor are not limited in the present application.

[0053] In an embodiment, the high-efficiency and energy-saving water tank 1 sterilization device comprises:

[0054] The water inlet 5 is used for the water source to enter the water tank 1;

[0055] The UV sterilizer 4 is used for sterilizing and killing the microorganisms in the tank through ultraviolet rays;

[0056] Water level probe 3, through the water level probe 3 detects the water level information in the tank, thereby obtaining the water quantity information;

[0057] Stirring pump, stirring the water flow in the water tank 1, making the water flow circulate, benefiting the sterilizer uniform sterilization, preventing the deep water from being unable to be sterilized;

[0058] Water storage tank 1, storing drinking water.

[0059] Sterilization time calculation formula:

[0060] (1);

[0061] Parameter value explanation:

[0062] Target dose ( ): Drinking water standard (kill 99.99% of E. coli): ≥40 mJ / cm².

[0063] Effective UV power ( ): The measured value of the present application is ≥140 mW.

[0064] Wavelength correction coefficient ( ): The ultraviolet wavelength used in the sterilizer of the present application is 270-280 nm, and the sterilization efficiency is lower than that of the standard 253.7 nm mercury lamp: the efficiency at 275 nm is about 70-80% of that at 253.7 nm (reference light biological action spectrum). Take the intermediate value: = 0.75;

[0065] Quartz sleeve transmittance ( ): The transmittance of the new sleeve is about 90-95%, and the intermediate value is taken = 0.9; System constant (k): The sterilization efficiency of the sterilization lamp is also related to the mixing degree of the water flow, the water quality, and the geometry of the tank.

[0066] In the present application, the stirring pump drives the water flow to circulate, improves the uniformity of the dose distribution, and the water quality is considered to be pure water, but the geometry is still not ideal. According to the experimental data, the correction is:

[0067] When the water quality is good and fully stirred, k ≈0.04-0.06 (L·mJ / cm²) / (mW·s), and the intermediate value k =0.05 is taken;

[0068] Volume of water to be sterilized (V): obtained according to the water level probe 3 measured water quantity.

[0069] The water level probe 3 detects that the water quantity is 1L.

[0070] Bring into the sterilization time calculation formula (Second); turn on the sterilization lamp, and time for 8.5 seconds; turn off the sterilization lamp after 8.5 seconds; if the water is not replenished for more than 2 hours; turn on the stirring pump to start circulating the water; and bring in the sterilization time calculation formula (Second);

[0071] Turn on the sterilization lamp, and time for 25.4 seconds; turn off the sterilization lamp after 25.4 seconds, and turn off the stirring pump.

[0072] The opening time of the stirring pump is the time of periodic sterilization, for example, if the time of two hours has arrived, first turn on the stirring pump for 10 seconds to make the water flow stable and circulate, then turn on the sterilization lamp, turn off the sterilization lamp after the sterilization lamp is turned off, and the stirring pump is turned off synchronously, so the time length is 10 seconds + the calculated time length of the sterilization lamp working.

[0073] The current opening power is running according to the rated power, and the power needs to be referred to the electrical parameters of the motor, which can be optimized to run at full power before the water flow reaches stable circulation, for example, 10 seconds at full power, and after stable circulation, control the motor output duty cycle to reduce power operation.

[0074] An NTC temperature detection sensor is added in the water tank 1, and the frequency of sterilization when the water tank 1 is stationary is adjusted according to the feedback temperature value, which is currently set to 2 hours for simplicity, for example, less than 5℃ to inhibit bacterial reproduction, 24 hours of periodic disinfection of the water tank 1, 30℃, adjustment to 4 hours of disinfection once, 6 times of disinfection per day. The periodic sterilization frequency is dynamically adjusted according to the temperature, thereby optimizing the working time of the sterilizer.

[0075] The sterilization lamp in the application refers to its data manual, and the service life of the lamp bead is 1000 hours of continuous work. The sterilization lamp does not run at rated power, which will affect the sterilization effect. The application calculates the time required to achieve the fastest sterilization effect of drinking water standard through known parameters. The sterilization lamp works at full power, voltage DC 24V, and current 150-190mA.

[0076] The water in the water tank 1 can reach the standard of drinking water, reduce the use time of the UV sterilization lamp, prolong the service life, save energy and be efficient. The sterilizer can uniformly sterilize the entire water tank 1, and prevent bacteria from breeding in deep water.

[0077] In addition, the embodiment of the application also provides a high-efficiency and energy-saving water tank sterilization method, which comprises:

[0078] S1: judging whether the water tank is replenished with water;

[0079] If yes, S2: according to the water supplement amount of the water tank, the new water amount sterilization operation time length is calculated according to formula (1) and sterilization operation is performed, if no, S3, whether the current water tank distance from the last sterilization operation time length is greater than the predetermined time length; if yes, S4, according to the water tank, the whole water is sterilized, and the whole sterilization time length is calculated according to the formula (1) and the whole sterilization operation is performed.

[0080] wherein, (1);

[0081] is the target dose, is the effective UV power of the UV sterilizer, is the wavelength correction coefficient, is the quartz sleeve transmittance, k is the system constant, and V is the volume of the water corresponding to the sterilization and disinfection.

[0082] Since the high-efficiency energy-saving water tank sterilization method is the method corresponding to the high-efficiency energy-saving water tank sterilization device described above, it has the same beneficial effects, and this application will not be repeated here.

[0083] In order to further improve the disinfection and sterilization efficiency of the water stored in the water tank, in one embodiment, after S2 or S4, it further comprises:

[0084] Turning on the agitator in the water tank to stir the water in the water tank, so that the water in the water tank circulates.

[0085] By stirring the water in the water tank through the agitator after starting disinfection and sterilization, the water in the water tank circulates, and the water that has not been disinfected and sterilized can flow to the position of the UV sterilizer for disinfection and sterilization, improving the efficiency of disinfection and sterilization.

[0086] The position, structure and installation method of the agitator in the application are not limited.

[0087] In order to improve the adaptability to various devices, before S1, it further comprises:

[0088] Setting the target dose, the effective UV power, the wavelength correction coefficient, the quartz sleeve transmittance, and the system constant.

[0089] By setting the target dose, the effective UV power, the wavelength correction coefficient, the quartz sleeve transmittance, and the system constant, the parameters corresponding to different devices can be realized, the precision of disinfection and sterilization is improved, and the energy consumption is reduced.

[0090] The way of parameter setting, position is not limited in the application, can be on-site setting, also can be remote setting, also can be other setting, setting mode also can be direct digital setting, also can be setting automatically according to model and age, etc.

[0091] In order to improve the management efficiency, in one embodiment, after the S2 or the S4, further comprising:

[0092] Display real-time water level value, new water volume, the UV power, the target dose, the effective UV power, the wavelength correction coefficient, the quartz sleeve transmittance and the system constant, the running speed and length of the stirrer.

[0093] Through the display device operation data, the running state is monitored, and the reliability of operation is improved.

[0094] By using the water level probe, the new water just entering the water tank is calculated according to the amount of water, and the sterilization time required for drinking water is calculated, and the sterilization treatment of the new water is efficiently completed. Reduce the working time of the sterilizer, increase the service life, save energy consumption.

[0095] For the old water stored in the water tank for a long time, the stirring pump is started, the water in the water tank starts to circulate, and the water level probe is combined to sterilize the whole tank according to the volume of the water tank, so that the whole tank of drinking water can be uniformly sterilized.

[0096] In summary, the efficient and energy-saving water tank sterilization method and device provided by the embodiment of the application, by setting the sterilization calculation unit and the control unit in the sterilization process of the water tank, the real-time water level value of the water tank is detected by the water level sensor and the new water volume V is calculated, the sterilization time t of the UV sterilizer is calculated according to the new water volume, and the control unit controls the sterilization operation of the UV sterilizer according to the sterilization time. Since the sterilization time is calculated and controlled according to the new water volume, the water in the water tank can reach the standard of drinking water, the use time of the UV sterilization lamp is reduced, the service life is increased, and energy is saved.

[0097] The efficient and energy-saving water tank sterilization method and device provided by the application are described in detail. In this paper, specific examples are applied to describe the principles and implementation modes of the application. The above description of the embodiments is only used to help understand the method and its core idea. It should be pointed out that for ordinary skilled persons in the technical field, without departing from the principles of the application, some improvements and modifications can be made to the application, and these improvements and modifications also fall within the protection scope of the claims of the application.

Claims

1. A high-efficiency and energy-saving water tank sterilization device, characterized in that, The device includes a UV sterilizer, a water level sensor, a sterilization calculation unit, and a control unit installed in a water tank. The water level sensor is used to detect the real-time water level of the water tank and calculate the new water volume V. The sterilization calculation unit is used to calculate the sterilization time t of the UV sterilizer according to the new water volume using formula (1). The control unit is connected to the UV sterilizer, the water level sensor, and the sterilization calculation unit and is used to control the UV sterilizer to perform sterilization operation according to the sterilization time. in, (1); For the target dose, The effective UV power of the UV sterilizer, This is the wavelength correction factor. denoted as , where is the transmittance of the quartz sleeve, and k is a system constant.

2. The high-efficiency and energy-saving water tank sterilization device as described in claim 1, characterized in that, It also includes a second sterilization unit connected to the control unit. The second sterilization unit is used to sterilize all the water in the water tank after detecting that the time without sterilization exceeds a predetermined time. The overall sterilization time is calculated according to the formula (1). The control unit controls the UV sterilizer to perform overall sterilization operation according to the overall sterilization time.

3. The high-efficiency and energy-saving water tank sterilization device as described in claim 2, characterized in that, It also includes a parameter setting unit connected to the water tank and the control unit, the parameter setting unit being used to set the target dose, the effective UV power, the wavelength correction coefficient, the quartz tube transmittance, and the system constant.

4. The high-efficiency and energy-saving water tank sterilization device as described in claim 3, characterized in that, It also includes a stirrer installed in the water tank for stirring the water in the tank, so that the water in the tank circulates.

5. The high-efficiency and energy-saving water tank sterilization device as described in claim 4, characterized in that, It also includes a display panel connected to the control unit, the parameter setting unit, the UV sterilizer, and the water level sensor, for displaying the real-time water level value, the newly added water volume, the UV power, the target dose, the effective UV power, the wavelength correction coefficient, the transmittance of the quartz sleeve, the system constant, and the operating speed and duration of the stirrer.

6. The high-efficiency and energy-saving water tank sterilization device as described in claim 5, characterized in that, The water level sensor is a water level probe, a float-type liquid level transmitter, a magnetic liquid level transmitter, an immersion-type liquid level transmitter, or an electric internal float liquid level transmitter.

7. A highly efficient and energy-saving method for sterilizing water storage tanks, characterized in that, include: S1: Determine if the water tank needs to be replenished; If yes, S2: Calculate the sterilization operation time of the newly added water volume according to the formula (1) based on the water replenishment amount of the water tank and perform sterilization operation; if no, S3: Determine whether the current water tank is longer than the predetermined time since the last sterilization operation. If so, S4, sterilize all the water in the tank according to the formula (1) to obtain the overall sterilization time and perform the overall sterilization operation; in, (1); For the target dose, The effective UV power of the UV sterilizer, This is the wavelength correction factor. denoted as quartz tube transmittance, k as system constant, and V as the volume of water corresponding to disinfection and sterilization.

8. The high-efficiency and energy-saving water tank sterilization method as described in claim 7, characterized in that, Following S2 or S4, the following is also included: Turn on the agitator in the water tank to agitate the water in the tank, so that the water in the tank circulates.

9. The high-efficiency and energy-saving water tank sterilization method as described in claim 8, characterized in that, Before S1, it also includes: The target dose, the effective UV power, the wavelength correction factor, the quartz tube transmittance, and the system constant are set.

10. The high-efficiency and energy-saving water tank sterilization method as described in claim 9, characterized in that, Following S2 or S4, the following is also included: The system displays real-time water level, new water volume, UV power, target dose, effective UV power, wavelength correction factor, quartz tube transmittance, system constant, and the operating speed and duration of the stirrer.

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