JP5681941B2 - Water purifier - Google Patents

Description

  The present invention relates to a water purifier, and more particularly to a water purifier having a sterilizing ability.

  In recent years, interest in water quality such as drinking water has increased, and water purifiers have become popular in the home. Moreover, in order to secure clean water, sterilization is a problem in addition to filtration, and a water purifier equipped with a germicidal lamp has been proposed.

Japanese Patent Laid-Open No. 10-192893

  However, many problems still remain in providing a water purifier having a sterilizing ability in a form that can be used generally at home and the like.

  In view of the above, an object of the present invention is to provide a water purifier having a sterilizing ability that can be used generally in homes and the like.

  In order to solve the above problems, the present invention provides a water inflow part, an ultraviolet sterilization part that sterilizes water flowing from the water inflow part using a deep ultraviolet LED as a light source, and a water outflow that causes the purified water sterilized by the ultraviolet sterilization part to flow out. The water purifier which has a cooling part which cools deep-UV LED with the water which flowed in from the water inflow part from the water inflow part is provided. Although the luminous efficiency of the LED decreases due to heat generation, according to the above configuration of the present invention, the deep ultraviolet LED can be cooled with water flowing in for the purpose of water purification, so it is possible to make purified water effectively without reducing the sterilizing effect. It becomes.

  According to a specific feature of the present invention, the cooling part cools the deep ultraviolet LED by the water itself flowing in from the water inflow part and flowing out of the water outflow part. As a result, a configuration in which the sterilization of water by the deep ultraviolet LED and the cooling of the deep ultraviolet LED by the water are organically combined is possible. According to a more specific feature of the present invention, the cooling unit has a series of water channels that guide water that is irradiated with ultraviolet rays generated from the deep ultraviolet LEDs for cooling the deep ultraviolet LEDs. According to a more specific feature of the present invention, the deep ultraviolet LED has an ultraviolet light emitting part and a heat radiating part, and the series of water channels are arranged around the ultraviolet light generating part and the heat radiating part.

  According to another specific feature of the present invention, the cooling unit has a cooling water channel that guides cooling water that flows in from the water inflow unit and that does not mix with purified water that flows out of the water outflow channel. According to this feature, water necessary for cooling can be secured independently of the necessary amount of sterilized purified water, and the cooling water thus secured is not mixed with purified water, so sterilization is insufficient. There is no problem.

  According to the more specific feature of the present invention based on the above, the cooling unit cools the deep ultraviolet LED by the water itself flowing in from the water inflow portion and out of the water outflow portion, and when this cooling is insufficient It has a hydration part which guides water from a water inflow part to a cooling channel. Thus, the water to be sterilized is effectively cooled first, and when this is insufficient, the cooling capacity of the cooling water channel can be additionally mobilized. According to a more specific feature of the present invention, whether to introduce water from the water inflow portion into the cooling water channel is determined based on the water temperature of the water outflow portion.

  According to another aspect of the present invention, there is provided a water storage unit and a heat dissipation structure that sterilizes water stored in the water storage unit using the deep ultraviolet LED as a light source and cools the deep ultraviolet LED by the water stored in the water storage unit itself. A water purifier having an ultraviolet sterilization unit is provided. Accordingly, it is possible to organically combine the sterilization of water by submerging the deep ultraviolet LED structure in the water storage unit and the cooling by submerging the deep ultraviolet LED structure in the water storage unit.

  According to a more specific feature of the present invention, a metal heat radiating plate connected to the deep ultraviolet LED is employed as the heat radiating structure. According to a more specific feature of the present invention, the metal heat sink is coated so as not to directly contact the water stored in the water storage section. This prevents contamination of purified water by submerging the sterilizing structure in the water storage section. According to another specific feature of the present invention, the deep ultraviolet LED is controlled in accordance with the water level stored in the water storage section. As a result, for example, it is possible to prevent the sterilization structure portion coming out of the water surface from being driven in a meaningless and uncoolable state when the water level is low.

  According to another aspect of the present invention, an ultraviolet sterilization unit that sterilizes water using a deep ultraviolet LED as a light source, a cooling unit that cools the deep ultraviolet LED with water, an ultraviolet generation period and an ultraviolet non-generation cooling period for the deep ultraviolet LED A water purifier having a drive unit that is driven to be repeated is provided. As a result, the installation of the UV-free cooling period from the deep UV LED and the cooling of the deep UV LED with water are organically linked in the water purifier for water, and the water purifier having a sterilizing effect is effectively provided. be able to. According to a specific feature of the present invention, it has a water inflow portion and a water outflow portion for allowing the purified water sterilized by the ultraviolet sterilization portion to flow out, and the cooling portion flows in from the water inflow portion and out of the water outflow portion. The deep ultraviolet LED is cooled by water itself. As a result, it is possible to provide a specific configuration taking advantage of the above characteristics. According to a more specific feature of the present invention, the driving part of the deep ultraviolet LED changes the ultraviolet energy generated from the deep ultraviolet LED, so that these ratios are set using the ultraviolet generation period and the non-ultraviolet generation cooling period. change.

  According to other features of the present invention, a water inflow portion, an ultraviolet sterilization portion that sterilizes water flowing from the water inflow portion using a deep ultraviolet LED as a light source, and a water outflow portion that causes the water sterilized by the ultraviolet sterilization portion to flow out And a controller for controlling the ultraviolet energy generated from the deep ultraviolet LED based on the amount of water flowing out from the water outflow unit. This makes it possible to sterilize according to the required clean water.

  According to another aspect of the present invention, an ultraviolet sterilization unit that sterilizes water using a deep ultraviolet LED as a light source, and a secondary battery that receives power from the outside and is charged by the supplied power to drive the deep ultraviolet LED. A power supply unit having power and normally supplying power supplied from the outside to the deep ultraviolet LED and supplying power from the secondary battery to the deep ultraviolet LED in a state where power is supplied from the outside based on a predetermined condition A water purifier having a controller is provided. Accordingly, the function of the secondary battery can be checked every time the predetermined condition is satisfied, and a situation where the secondary battery does not function can be prevented in advance when power is to be supplied from the secondary battery to the deep ultraviolet LED due to a power failure or the like. According to a specific feature of the present invention, a water outflow part that causes the water sterilized by the ultraviolet sterilization part to flow out is provided, and the control unit is a deep ultraviolet LED from the secondary battery according to the water outflow situation from the water outflow part. To supply power. This is a reasonable example of the predetermined condition.

  As mentioned above, according to this invention, the water purifier provided with the ultraviolet sterilization capability suitable for general use at home etc. can be provided.

It is a block diagram which shows the Example of the water purifier system which concerns on embodiment of this invention. It is a flowchart which shows the basic function of the control part of FIG. It is a flowchart which shows the detail of the test process in step S2 of FIG. It is a flowchart which shows the detail of the flowing water process in step S26 of FIG. It is a flowchart which shows the detail of the water storage process in step S34 of FIG. It is a block diagram which shows the detailed structure of the sterilizer in the Example of FIG. 1, and a purified water storage tank.

  FIG. 1 is a block diagram illustrating an example of a water purifier system according to an embodiment of the present invention. In the water purifier 2, the raw water inflow portion 7 is connected to a water pipe branched from a main plug 6 of a domestic water pipe 4 drawn from the outside. In addition, the number 2 in FIG. 1 also means the outer wall part of the water purifier. On the other hand, another water pipe branched from the main plug 6 is directly connected to the switching plug 8 as a bypass for the water purifier 2. The switch tap 8 is provided, for example, in a kitchen sink of a home, and can switch the raw water directly guided from the main plug 6 and the purified water guided from the water purifier 2 to discharge water. In FIG. 1, the flow of water is indicated by white arrows as described above, and this point is the same in the following. In addition, although the operation which drains water from the water purifier 2 with the switch tap 8 can be performed manually, this can also be performed by control from the water purifier 2 side. At this time, when the switch tap 8 is manually operated, the information is transmitted to the water purifier 2 side.

  The raw water guided to the water purifier 2 enters the filtration tank 14 through the water pressure meter 10 and the flow meter 12. The filtration tank 14 filters out relatively large impurities in water. The water that has passed through the filtration tank 14 further enters the adsorption tank 16, and molecular level impurities are removed by adsorption. The water that has passed through the adsorption tank 16 further enters the sterilization tank 20 of the sterilization apparatus 18, where microorganisms are killed.

  The sterilization tank 20 is provided with a deep ultraviolet LED group 22, and the water path of the sterilization tank 20 is configured to circulate between these deep ultraviolet LED groups 22. This deep ultraviolet LED group 22 can generate UV-B or UV-C level deep UV rays. Further, in order to transmit deep ultraviolet light, the water channel around the deep ultraviolet LED group 22 is made of quartz glass. The deep ultraviolet LED group 22 is driven by a drive circuit 26 controlled by the control unit 24.

  Driving by the drive circuit 26 is based on pulse width modulation control (hereinafter referred to as “PWM control”) having a relatively low frequency. This is because the energy amount of deep ultraviolet rays is changed according to the amount of water to be sterilized as described later. One of its purposes. Another purpose of the PWM control is to increase luminous efficiency by preventing overheating of the deep ultraviolet LED due to continuous lighting. In other words, PWM control is performed to turn on the deep ultraviolet LED, wait for it to cool down before the deep ultraviolet LED lights up and its temperature increases and the luminous efficiency deteriorates, and then turns on again. .

  In addition, according to the present invention, since the deep ultraviolet LED is cooled by the water guided to the water purifier as described later, the effect of providing a cooling period that is turned off by PWM is high. As the ultraviolet light source, a mercury lamp or a xenon lamp is generally used, but in this embodiment, a deep water purifier having a high bactericidal effect and suitable for home use is realized by using a deep ultraviolet LED. Since deep ultraviolet rays are also dangerous for the human body, various safety measures are taken in this embodiment as will be described later. The control unit 24 that controls the drive circuit 26 includes a computer, and functions thereof are executed by a program stored in the storage unit and an arithmetic circuit.

  A part of the outer wall of the sterilization tank 20 is a fluorescence observation window 28 made of ordinary glass that is coated with a fluorescent material that converts deep ultraviolet light into visible light and does not allow deep ultraviolet light to pass through. The light emitted from the deep ultraviolet LED can be visually confirmed from the outside of the water purifier 2 by the visible fluorescence guided from the fluorescence observation window 28. Further, the sterilization tank 20 is provided with a water passage transmitted light receiving unit 30 that receives light emitted from the deep ultraviolet LED group 22 and transmitted through the quartz glass water channel in the sterilization tank 20, and outputs the light to the control unit 24. By sending the light, the emission of the deep ultraviolet LED group 22 can be confirmed without relying on visual observation. The water passage transmitted light receiving unit 30 may use a light receiving element having sensitivity to deep ultraviolet rays, or may detect fluorescence converted by a fluorescent material with a light receiving element having sensitivity on a longer wavelength side. The water passage transmitted light receiving unit 30 is not only for confirming the light emission of the deep ultraviolet LED group 22, but also for detecting dirt inside the water channel of the quartz glass and detecting a decrease in sterilization effect.

  Although the luminous efficiency of the deep ultraviolet LED group 22 decreases due to heat generation, the embodiment of the present invention adopts a configuration in which the deep ultraviolet LED group 22 is water-cooled by water itself that goes around the sterilization tank 20. The water temperature gauge 32 detects the water temperature of the water that circulates around the sterilization tank 20 and transmits this to the control unit 24. The control unit 24 instructs the cooling and adding unit 34 when the water temperature becomes equal to or higher than a predetermined temperature, and guides water to another series of additional water cooling paths in the deep ultraviolet LED group 22. Increase inflow. However, since the water flowing through the additional water cooling path is not sufficient for sterilization time, it is discarded from the drain port 36 without being mixed into the purified water.

  The purified water sterilized in the sterilization tank 20 can be used as running water from the switching tap 8 connected to the purified water outflow portion 37, and the water tap 38 is opened and stored in the purified water storage tank 40. It is also possible to open and remove the water faucet 42 of another series. In addition, when storing in the purified water storage tank 40, compared with the case where it supplies water in real time from the switch tap 8, the amount of flowing water of the sterilization tank 20 can be decreased and the energy intensity of the deep ultraviolet LED group 22 can be reduced. Further, since the safety of the purified water stored in the purified water storage tank 40 for a long time cannot be guaranteed, when the storage time exceeds a predetermined time, the drain plug 44 is opened and the water in the purified water storage tank 40 is discarded. It can be replaced with fresh water. Control of the water tap 38 and the drain plug 44 is automatically performed by the control unit 24 that detects the water level of the purified water storage tank 40 and its temporal change. A deep ultraviolet LED group 46 is also provided in the purified water storage tank 40 to further sterilize the purified water in the stored water. The deep ultraviolet LED group 46 is controlled by the control unit 24. In addition, although illustration is abbreviate | omitted, the fluorescence observation window and transmitted light light-receiving part similar to the sterilization tank 20 are provided also in the purified water storage tank 40, and visual observation of the lighting state of the deep ultraviolet LED group 46 of the purified water storage tank 40 is carried out. Further, confirmation by the control unit 24 is possible.

  It is performed by opening the part replacement opening / closing part 50 for performing maintenance such as replacement, cleaning, and the like of each part of the filtration tank 14, the adsorption tank 16, the sterilization tank 20, and the purified water storage tank 40. At this time, since there is a risk of exposure to deep ultraviolet rays, the control unit 24 monitors the open / close state of the component replacement opening / closing unit 50, and prohibits lighting of the deep ultraviolet LED group 22 and the deep ultraviolet LED group 46 when it is in the open state. To do. Here, the “open state” includes not only a clear open state but also all states that may cause ultraviolet leakage such as not being properly closed. Further, the light tightness sensor 52 checks whether the component replacement opening / closing part 50 is not closed securely or whether any part of the outer wall of the water purifier 2 is damaged to cause light leakage from the outside to the inside. When light leakage from the outside is detected, there is a risk of ultraviolet leakage from the inside to the outside. Therefore, the control unit 24 turns on the deep ultraviolet LED group 22 and the deep ultraviolet LED group 46 accordingly. Ban.

  When the water purifier 2 is not in use and no water pressure is applied to the water pressure gauge 10, or when the flowmeter 12 does not detect a predetermined flow rate, the control unit 24 prohibits the lighting of the deep ultraviolet LED group 22 respectively. . The control unit 24 prohibits lighting of the deep ultraviolet LED group 46 when the water purification tank 40 is empty. These prevent unexpected situations caused by exposure to deep ultraviolet rays. When the abnormal state that should prohibit the lighting of the deep ultraviolet LED group 22 or the deep ultraviolet LED group 46 occurs as described above, the warning unit 54 uses an optical signal or a sound signal such as a warning sound or an announcement outside the water purifier. Warning.

  Each component of the water purifier 2 as described above is supplied with power by a power supply unit 58 connected to the outlet of the electric light line 56. The power source 58 is provided with a secondary battery 60, which is maintained in a fully charged state by trickle charging, and is prepared for clean water sterilization at the time of power failure. The power supply unit 58 is switched to power feeding by the secondary battery 60 in a state where power is supplied from the lamp line for a short time each time the switching plug is opened and closed a predetermined number of times. As a result, the performance deterioration of the secondary battery 60 is tested, and a situation in which the secondary battery 60 cannot be sterilized in an emergency is prevented in advance. In addition, since the deep ultraviolet light source for sterilization of the present embodiment is an LED with low power consumption, the power source can be completely battery driven.

  FIG. 2 is a flowchart showing the basic functions of the control unit 24. The water purifier 2 is installed and the power source unit 56 is connected to the outlet of the electric light line 54, or in the case of battery-powered driving, the process starts with battery installation. When the flow starts, a test process is performed in step S2 to check whether the water purifier 2 is correctly installed. Details thereof will be described later.

  When the test process in step S2 ends, the flow proceeds to step S4, and all deep ultraviolet LEDs inside the water purifier 2 are first turned off. Specifically, both the deep ultraviolet LED group 22 of the sterilization tank 20 and the deep ultraviolet LED group 46 of the purified water storage tank 40 are turned off. Next, in step S6, it is checked whether or not the component replacement opening / closing part 50 remains open. If there is no abnormality, the process proceeds to step S8, and it is checked whether or not light leakage is detected by the light tightness sensor 52. If this is not abnormal, the process proceeds to step S10, and the deep ultraviolet transmitted light detected by the water passage transmitted light receiving unit 30 of the sterilization tank 20 and the deep ultraviolet transmitted light detected by the light receiving unit (not shown) of the purified water storage tank 40 are appropriate. Check if it is. If so, the process proceeds to step S12. In step S10, transmitted light is not detected when the deep ultraviolet LED is not turned on, but in this case, it is determined to be appropriate. That is, step S10 is a check item when the deep ultraviolet LED is turned on. This is common to the following similar steps.

  On the other hand, it is detected in step S6 that the component replacement opening / closing part 50 is in the open state, or it is detected in step S8 that it is not in the light tight state, or any transmitted light is not appropriate in step S10. In any case, the process proceeds to step S14, where a warning of the corresponding abnormal state is given. And a flow returns to step S4 and all deep ultraviolet LED is turned off. Hereinafter, step S4 to step S10 and step S14 are repeated unless the abnormality is corrected. When an abnormality is detected in any of steps S6 to S10, if the deep ultraviolet LED is already off, step S4 is redundant. However, as will be described later, steps S6 to S10 are detected in various situations. In order to turn off the deep ultraviolet LED, which is the purpose, the process goes through step S4.

  In step S12, it is checked whether the water pressure applied to the water purifier 2 is appropriate based on the information of the water pressure gauge 10. The case where the water pressure is appropriate means that the main plug 6 is opened and the water pressure of the water pipe 4 is applied to the water purifier. If the water pressure is not appropriate, the process returns to Step S6, and Steps S6 to S12 are repeated until the opening of the main plug 6 is detected in Step S12.

  When the main plug 6 is opened and the water pressure gauge 10 detects that the water pressure is applied to the water purifier 2, if it is detected that the water pressure is appropriate in step S 12, the process proceeds to step S 16, and the purified water storage tank 40 is installed. It is checked whether it is empty. If it is not empty, it will progress to step S18 and will turn on the deep ultraviolet LED group 46 of the purified water storage tank 40, and will transfer to step S20. On the other hand, when it is detected in step S16 that the purified water storage tank 40 is empty, the process proceeds to step S22, the deep ultraviolet LED group 46 of the purified water storage tank 40 is turned off, and the process proceeds to step S20. In either case, when the deep ultraviolet LED group 46 is on or off, the original state is continued.

  In step S20, based on the output of the flow meter 12, it is checked whether or not a flow rate of “level 1” or higher is flowing into the water purifier 2, and if applicable, the process proceeds to step S24. “Level 1” is the lowest level flow rate that can be regarded as the switch tap 8 being opened, and the flow rate when the water tap 38 is fully opened as described later is set smaller than this. Even if the stopper 38 is opened, the process does not proceed from step S20 to step S24. In addition, the identification of whether the cause of the water flow detected by the flow meter 12 is due to the opening of the switching tap 8 or the water storage valve 38 is determined by the control unit in addition to the case of determining by the magnitude of the flow rate as in step S20. 24 may be used to obtain direct information as to which of the switching tap 8 and the water storage tap 38 has been opened. In the case of such a configuration, step S20 is read as "the switching tap is switched to the water purifier side and opened and there is a water flow?"

  When a water flow of level 1 or higher is detected in step S20, the process proceeds to step S24, the deep ultraviolet LED group 22 in the sterilization tank 20 is turned on, and the flow proceeds to the water flow process of step S26. The outline of the running water treatment is control of the energy amount of the deep ultraviolet LED 22 according to the water flow rate, and the details will be described later. When the running water process of step S26 is completed, the process returns to step S6, and the processes from step S6 are repeated.

  On the other hand, if the flow rate of level 1 or higher is not detected in step S20, it is considered that there is no water flowing out from the switch tap 8. Therefore, the process proceeds to step S28, and it is checked whether the water stored in the purified water storage tank 40 has been kept for a long time. For example, if it is detected that the water level in the water purification tank 40 has not changed for more than a day, it is considered that the water has been stored for a long period of time. If it does not correspond to long-term water storage, it will progress to step S30 and it will be checked whether the water level of the purified water storage tank 40 will become below predetermined, and water storage is insufficient. If it does not correspond to the shortage of water storage, it returns to step S6 and repeats the process from step S6 below.

  If long-term water storage is detected in step S28 or water shortage is detected in step S30, the process proceeds to step S32, the deep ultraviolet LED group 22 in the sterilization tank 20 is turned on, and the process proceeds to the water storage process in step S34. The outline of the water storage process is replacement or replenishment of the water storage, details of which will be described later. When the running water process in step S34 is completed, the process returns to step S6, and the processes from step S6 are repeated.

  FIG. 3 is a flowchart showing details of the test process in step S2 of FIG. When the flow starts, first, in step S42, all deep ultraviolet LEDs are turned off and the process proceeds to step S44. Then, steps S42 and S44 are repeated to wait for a manual operation for lighting the deep ultraviolet LEDs. During this time, it is desirable to display or announce a manual operation. If there is a manual operation, the process proceeds to step S46, and it is checked whether or not the part replacement opening / closing part 50 remains open. If there is no abnormality, the process proceeds to step S48, and it is checked whether or not light leakage is detected by the light tightness sensor 52. If there is no abnormality, the process proceeds to step S50, and a display is performed in which all deep ultraviolet LEDs are test-lit for 5 seconds.

  Then, the process proceeds to step S52, where the deep ultraviolet transmitted light detected by the water passage transmitted light receiving unit 30 of the sterilization tank 20 and the depth detected by the light receiving unit (not shown) in the purified water storage tank 40 in the state where the deep ultraviolet LED is on. Check whether each UV light is appropriate. In this case, it is assumed that water has not yet been introduced into the water purifier 2, and “appropriate” in step S 52 is simply the presence / absence of lighting, and it is lit without determining to that level. If it is appropriate. In addition, for 5 seconds when all the deep ultraviolet LEDs are turned on, it is possible to confirm the lighting of the deep ultraviolet LED group 22 and the deep ultraviolet LED group 46 by visual observation from the fluorescence observation window. If it is determined in step S52 that the transmitted light is appropriate, the process proceeds to step S54.

  On the other hand, after an abnormality is detected in any of step S46, step S48, and step S52, a warning of the corresponding abnormality is made after step S56, and the process returns to step S42 to turn off the all deep ultraviolet LED 42. Thereafter, if the lighting operation is not performed again in step S44, the flow repeats step S42 and step S44. On the other hand, if the warning abnormality is corrected and the lighting operation is performed, the check from step S46 is performed again.

  When it is detected that the transmitted light is appropriate and the process proceeds to step S54, guidance for prompting the opening operation of the main plug 6 is performed here, and then the switching plug 8 is switched to the water purifier side and opened in step S58. wait. During this time, it is desirable to display or announce the manual operation of the switch tap 8. When the water purification opening operation of the switch tap 8 is detected in step S58, the process proceeds to step S60, where it is checked whether the water pressure is appropriate. If the water pressure is appropriate, it is checked whether the flow rate is level 1 or higher in step S62. Here, if the flow rate is equal to or higher than level 1, it means that the main plug 6 and the switching plug 8 are correctly opened, so that the process proceeds to step S64, and the deep ultraviolet LED group 22 of the sterilization tank 20 is turned on. Note that it is assumed that, until this time, the lighting of all deep ultraviolet LEDs for 5 seconds instructed in step S50 has ended, and all of them are in the off state.

  Next, in step S66, it is checked whether or not the deep ultraviolet transmitted light detected by the water passage transmitted light receiving unit 30 of the sterilization tank 20 is appropriate when the deep ultraviolet LED group 22 is on. In this case, it is a check in a state where water is actually introduced into the sterilization tank 20, and “appropriate” does not only mean that the deep ultraviolet LED group 22 is lit but also passes through the water channel containing the water. Also check whether the transmitted light level is appropriate. If it is determined in step S66 that the water passage transmitted light is appropriate, the process proceeds to step S54. In this case as well, lighting of the deep ultraviolet LED group 22 can be confirmed by visual observation from the fluorescence observation window 28. The check in step S66 is a check of whether or not the transmitted light is appropriate, and also a check of whether or not the deep ultraviolet LED group 22 is automatically turned on when a flow rate of level 1 or higher is detected.

  If it is determined in step S66 that the transmitted light is appropriate, the process proceeds to step S68 and waits for the closing operation of the switching plug opened on the water purifier side. During this time, it is desirable to display or announce a manual operation. If there is a manual operation, the flow ends. On the other hand, if it is determined in step S66 that the transmitted light from the sterilization tank 20 is not appropriate, the process proceeds to step S70, the deep ultraviolet LED group 22 is turned off, and the process proceeds to step S72 to give a warning to that effect. Return. If it is determined in step S60 that the water pressure is not appropriate, or if it is determined in step S62 that the flow rate is not level 1 or higher, the flow proceeds to step S72, a corresponding warning is given, and the flow returns to step S54. Accordingly, it is possible to perform the test after step S54 again in the corrective action taken to the heart.

  FIG. 4 is a flowchart showing details of the running water treatment in step S26 of FIG. When the flow starts, it is checked in step S82 whether the flow rate level is equal to or lower than level 2 (where level 2> level 1). Since entering the flow of FIG. 4 is a case where the flow rate is higher than level 1, it is determined whether or not the flow rate is between level 1 and level 2 in step S82. If applicable, the process proceeds to step S84, and the lighting duty of the deep ultraviolet LED group 22 that is PWM-controlled by the drive circuit 26 of FIG. 1 is set small, and the process proceeds to step S86. In addition, since the deep ultraviolet LED group 22 is exclusively controlled in running water treatment, in FIG. 4, for the sake of simplicity, “sterilization tank deep ultraviolet LED (deep ultraviolet LED group 22)” is simply “deep ultraviolet LED” as in step S84. Called. The same applies to the following steps in FIG.

  On the other hand, when the flow rate is higher than level 2 in step S82, the process proceeds to step S88, and it is checked whether the flow rate is lower than level 3 (however, level 3> level 2). If applicable, the process proceeds to step S90, the lighting duty of the deep ultraviolet LED group 22 is set to medium, and the process proceeds to step S86. On the other hand, when the flow rate is larger than level 3 in step S88, the process proceeds to step S92, the lighting duty of the deep ultraviolet LED group 22 is set large, and the process proceeds to step S86. As described above, Step S82, Step S84 and Step S88 to Step S92 are for increasing the lighting duty of the deep ultraviolet LED group 22 and increasing the irradiation energy as the flow rate increases. In FIG. 4, the adjustment is performed in three steps. However, the number of adjustments may be increased or may be adjusted continuously in a stepless manner.

  In step S86, it is checked whether or not the water temperature of the sterilization tank 20 is above a predetermined level. If the temperature is higher than the predetermined level, the process proceeds to step S94 to instruct cooling and adding to step S96. Based on the instruction in step S 94, the cooling and adding unit 34 starts the process of guiding the cooling water to another series of additional water cooling paths in the deep ultraviolet LED group 22 and discarding the water after the heat exchange from the drain port 36. If cooling water has already been added, continue it. On the other hand, if the water temperature not lower than the predetermined value is not detected in step S86, the process proceeds to step S98, an instruction is given for no hydration, and the process proceeds to step S96. Based on the instruction in step S98, the cooling water adding unit 34 stops the cooling water addition. If cooling water is not added at this time, the state without water addition is continued.

  In step S96, it is checked whether or not the component replacement opening / closing part 50 remains open. If there is no abnormality, the process proceeds to step S100, and it is checked whether or not light leakage is detected by the light tightness sensor 52. If this is not abnormal, the process proceeds to step S102, where it is checked whether the deep ultraviolet transmitted light detected by the water passage transmitted light receiving unit 30 is appropriate. If appropriate, the process proceeds to step S104.

  In step S104, it is checked whether the flow rate is level 1 or higher. And if it is level 1 or more, it is considered that the water discharge state continues due to the opening of the switch tap 8. Therefore, the process returns to step S82, and thereafter, unless the flow rate becomes level 1 or less, steps S82 to S104 are repeated to change the flow rate. Responding to water temperature changes and various abnormalities. On the other hand, when it is detected in step S104 that the flow rate has become level 1 or less, the flow proceeds to step S106, the deep ultraviolet LED group 22 is turned off, and the flow is terminated.

  In addition, it is detected in step S96 that the component replacement opening / closing unit 50 is in the open state, or in step S100, it is detected that the component is not light tight, or in step S102, the deep ultraviolet water passage light is not appropriate. In any case, the process proceeds to step S108, and a warning of the corresponding abnormal state is given. Next, the process proceeds to step S110, where the control plug 24 is forcibly closed under the control of the control unit 24, and the process proceeds to step S106. In step S106, the deep ultraviolet LED group 22 is turned off to end the flow.

  FIG. 5 is a flowchart showing details of the water storage process in step S34 of FIG. When the flow starts, it is checked in step S122 whether the water storage process has been started for a long period of water storage. If the storage time is long, the process proceeds to step S124, and the deep ultraviolet LED group 22 and the deep ultraviolet LED group 46 are turned off. Next, drainage of the purified water storage tank 40 is started by opening the drain plug 44 in step S126, and the process waits until the purified water storage tank 40 becomes empty by repeating step S128.

  When it is detected in step S128 that the purified water storage tank 40 is empty, the process proceeds to step S130, the deep ultraviolet LED group 22 and the deep ultraviolet LED group 46 are turned on, and the drain plug 44 is closed. And it progresses to step S132 and it is checked whether the water level of the purified water storage tank 40 is more than predetermined. If the process proceeds from step S130 to step S132, the water level is naturally below a predetermined level, so the process proceeds to step S134, and the lighting duty of the deep ultraviolet LED group 22 is set small. Next, in step S136, the water tap 38 is fully opened, and the process proceeds to step S138. Here, the flow rate of the flow meter 12 when the water tap 38 is fully opened is level 1 or less. Therefore, even if the water tap 38 is opened, the running water process is not started from step S20 of FIG.

  On the other hand, if the water level in the purified water storage tank 40 is greater than or equal to the predetermined level in step S132, the process proceeds to step S140, the lighting duty of the deep ultraviolet LED group 22 is set to a slight value, and the water tap 38 is half-opened in step S136. The process proceeds to S138. Thus, when the water level of the purified water storage tank 40 is a predetermined level or more, the water storage speed is made smaller, and the energy of the deep ultraviolet LED group 22 is also minimized.

  In step S138, it is checked whether or not the water temperature in the sterilization tank 20 is above a predetermined level. The details of cooling and water addition are as described above. Moreover, as above-mentioned, when cooling water is already performed, it is continued. On the other hand, if the water temperature not lower than the predetermined value is not detected in step S138, the process proceeds to step S146, an instruction is given for no addition, and the process proceeds to step S148. As described above, if no cooling water is added at this point, the state without water addition is continued.

  In step S148, it is checked whether the water level of the purified water storage tank 40 is full. If it is not full, the process returns to step S132, and steps S132 to S148 are repeated to continue the water storage according to the water level and the water temperature. On the other hand, if it is detected in step S148 that the water level of the purified water storage tank 40 is full, the flow proceeds to step S150, the water tap 38 is closed, and the deep ultraviolet LED group 22 is turned off in step S152, and the flow is ended. In addition, the ON state of the deep ultraviolet LED group 46 in the purified water storage tank 40 is continued as long as there is storage in the purified water storage tank 40.

  FIG. 6 is a block diagram showing the detailed configuration of the sterilizer 18 and the purified water storage tank 40 in the embodiment of FIG. Common parts are given common numbers, and explanations are omitted unless necessary. First, the detailed configuration of the sterilizing apparatus 18 will be described. The specific configuration of the sterilizing tank 20 flows from the adsorption tank 16 as shown in FIG. The quartz glass channel 120 is directed to 38. For reference, the direction of water flow in the channel is indicated by short arrows at important points. The same applies to other configurations described below. Further, the deep ultraviolet LED group 22 is provided at a position where the bent quartz glass water channel 120 is sandwiched between the deep ultraviolet LED groups 22 as shown in FIG. This water is arranged so as to flow in the vicinity and cool the deep ultraviolet LED group.

  The deep ultraviolet LED group 22 is arranged side by side on a metallic heat dissipation substrate 122 and the outside thereof is covered with a quartz glass package 124. At this time, the back side of the heat dissipation substrate 122 is configured to be exposed from the quartz glass package. Thus, the quartz glass 120 water channel can be brought into close contact with the back side of the heat dissipation substrate 122, and the cooling effect on the back side of the heat dissipation substrate 122 by the water flowing inside the quartz glass 120 water channel is enhanced. Further, the water passage transmitted light receiving unit 30 receives the ultraviolet rays generated from the deep ultraviolet LED group 22 and transmitted through the quartz glass water passage 120 as described above. As a result, the generation of ultraviolet rays from the deep ultraviolet LED 22 can be confirmed, and if there is dirt or the like inside the quartz glass water channel 120, the transmitted light is weakened, which can be detected. The water temperature gauge 32 is provided in the vicinity of the exit of the quartz glass water channel 120 where the heating state of the water by the radiator plate 122 accumulates.

  The cooling water unit 34 includes a water tap 126 and a cooling tank 128 controlled by the control unit 24. The cooling bath 128 is for allowing water flowing in from the water faucet 126 to immerse and cool the quartz glass package 124 and the heat sink substrate 122 of the deep ultraviolet LED group 22 directly. The cooled water is drained from the rear outlet 36. As described above, the water in the cooling water portion directly touches the back side of the heat dissipation substrate 122 and has a high cooling effect and is not mixed with the purified water flowing through the quartz glass water channel 120.

  The deep ultraviolet LED group 46 of the purified water storage tank 40 is arranged side by side on the metallic heat dissipation substrate 130 in the same manner as the deep ultraviolet LED group 22 of the sterilizer 18, but the quartz glass package 132 is also on the back side of the heat dissipation substrate 130. The deep ultraviolet LED group 46 is covered. The deep ultraviolet LED group surrounded by the lower quartz glass package 134 has the same configuration. In this way, in the purified water storage tank 40, the units of the deep ultraviolet LED group whose unit is the structure entirely covered with the quartz glass package are directly immersed in the purified water in a stacked form. The quartz glass package covers the back side of the heat radiating substrate 130 as described above. This is to prevent the purified water in the stored water from being directly touched and contaminated by the heat radiating plate. The quartz glass package is extremely thin, and heat dissipation is efficiently performed from the back side of the heat dissipation plate 130 into the water storage through the thin quartz glass package layer.

  The water level meter 136 detects the water level of the stored purified water and transmits it to the control unit 24. The control unit 24 instructs the drive circuit 48 to control the deep ultraviolet LED group 46 based on the transmitted water level. Specifically, when only the deep ultraviolet LED group covered by the lower quartz glass package 134 has a low water level soaking in purified water, only the unit of the lower deep ultraviolet LED group is turned on, and the quartz When the water level is so high as to be immersed in purified water up to the unit of the upper deep ultraviolet LED group covered with the glass package 132, the deep ultraviolet LED group of both units is turned on. As a result, it is possible to prevent the upper deep ultraviolet LED group coming out of the water surface when the water level is low from continuing to be driven in a meaningless and uncoolable state. In FIG. 6, for the sake of simplicity, the units of the two deep UV LED groups in the horizontal direction are illustrated, but the number of the rows may be large, and the ON / OFF thereof may be finely controlled according to the water level.

  The fluorescence observation window 138 is omitted in FIG. 1, and the lighting state of the deep ultraviolet LED group 46 in the purified water storage tank 40 can be visually observed. The transmitted light receiving unit 140 is also omitted in FIG. 1, and the ultraviolet light generated from the deep ultraviolet LED group 46 having the above configuration and transmitted through the purified water stored in the purified water storage tank 40 is also transmitted. The light is received and transmitted to the control unit 24.

  As described above, in the present invention, since a water purifier using a new ultraviolet LED is used for general use such as home use, various safety measures are taken as a water purifier so as not to cause an unexpected situation due to ultraviolet exposure. In addition to this, in the embodiment of the present invention, the deep ultraviolet LED separated from the water purifier 2 is considered in consideration of an accident when the water purifier 2 is disassembled and the deep ultraviolet LED group 22 or 46 is taken out and misused. The group 22 or 46 alone is configured not to generate ultraviolet rays. Specifically, a diversion prevention contact is provided at the contact of the quartz glass package covering the deep ultraviolet LED group, and a diversion prevention judgment circuit is provided in the quartz glass package, and an encryption key signal is sent to the diversion prevention contact from the water purifier 2 side. As long as the diversion prevention determination circuit does not determine that the input is input, the deep ultraviolet LED group 22 or 46 does not generate ultraviolet rays. In addition, a diversion-preventing internal wiring portion is also provided in each deep ultraviolet LED connected to the heat dissipation substrate 122 or 130, and the machine can be obtained by inadvertently removing the individual deep ultraviolet LED group 22 or 46 from the heat dissipation substrate 122 or 130. As a result, the diversion-preventing internal wiring section is disconnected, so that each individual deep ultraviolet LED group 22 or 46 cannot be used.

The present invention provides a water purifier having a sterilizing ability that can be used generally in homes and the like.

7 Water inlet 22 Deep UV LED
DESCRIPTION OF SYMBOLS 20 Ultraviolet sterilization part 37 Water outflow part 120 Cooling part 120 A series of water channels 22 Ultraviolet light emission part 122 Radiation part 128 Cooling water path 126 Water addition part 24 Control part 40 Water storage part 46 Ultraviolet LED
130 Heat Dissipation Structure 132, 134 Cover 26, 48 Drive Unit 60 Secondary Battery 58 Power Supply Unit

Claims (14)

Water that sterilizes water flowing in from the water inflow portion using a deep ultraviolet LED as a light source, and has an ultraviolet sterilization portion having a heat radiating portion of the deep ultraviolet LED, and water that causes purified water sterilized by the ultraviolet sterilization portion to flow out A water purifier comprising: an outflow part; and a cooling part that cools the heat radiation part of the deep ultraviolet LED with water flowing in from the water inflow part. Inflow from the water inflow part, an ultraviolet sterilization part for sterilizing water flowing from the water inflow part using a deep ultraviolet LED as a light source, a water outflow part for flowing out purified water sterilized by the ultraviolet sterilization part, and an inflow from the water inflow part A cooling unit that cools the deep ultraviolet LED with the water, and the cooling unit cools the deep ultraviolet LED with water itself that flows in from the water inflow portion and flows out of the water outflow portion , and The cooling unit has a series of water channels that guide water for receiving the ultraviolet rays generated from the deep ultraviolet LEDs to cool the deep ultraviolet LEDs . 3. The water purifier according to claim 2, wherein the deep ultraviolet LED has an ultraviolet light emitting part and a heat radiating part, and the series of water passages are arranged around the ultraviolet light generating part and the heat radiating part. Inflow from the water inflow part, an ultraviolet sterilization part for sterilizing water flowing from the water inflow part using a deep ultraviolet LED as a light source, a water outflow part for flowing out purified water sterilized by the ultraviolet sterilization part, and an inflow from the water inflow part A cooling unit that cools the deep ultraviolet LED with the water that has been cooled , and the cooling unit includes a cooling channel that guides cooling water that flows in from the water inflow unit and does not mix with purified water that flows out of the water outflow channel. Features a water purifier. The cooling unit cools the deep ultraviolet LED with water itself flowing in from the water inflow portion and out of the water outflow portion, and when the cooling is insufficient, water from the water inflow portion is placed in the cooling water channel. The water purifier according to claim 4 , further comprising a hydration part that guides the water. The water purifier according to claim 5 , further comprising a control unit that determines whether or not to guide water from the water inflow portion to the cooling water channel based on a water temperature of the water outflow portion. While having a water storage part and an ultraviolet sterilization part having a heat dissipation structure for sterilizing water stored in the water storage part using a deep ultraviolet LED as a light source and cooling the deep ultraviolet LED by water stored in the water storage part itself , The water purifier , wherein the heat dissipation structure is a metal heat dissipation plate connected to the deep ultraviolet LED . The water purifier according to claim 7, wherein the metal heat radiating plate is coated so as not to be in direct contact with water stored in the water storage section. The water purifier according to claim 7 or 8, further comprising a control unit that controls the deep ultraviolet LED in accordance with a water level of water stored in the water storage unit.   An ultraviolet sterilization unit that sterilizes water using a deep ultraviolet LED as a light source, a cooling unit that cools the deep ultraviolet LED with water, and a drive that drives the deep ultraviolet LED so that an ultraviolet generation period and an ultraviolet non-generation cooling period are repeated. The water purifier characterized by having a part. The deep ultraviolet LED has a water inflow portion and a water outflow portion for flowing out the purified water sterilized by the ultraviolet sterilization portion, and the cooling portion flows in from the water inflow portion and flows out of the water outflow portion. The water purifier according to claim 10 , wherein the water purifier is cooled. The water purifier according to claim 10 or 11 , wherein the driving unit is capable of changing a ratio between an ultraviolet generation period and an ultraviolet non-generation cooling period. 12. The water purifier according to claim 1, further comprising a control unit that controls ultraviolet energy generated from the deep ultraviolet LED based on a water outflow amount from the water outflow unit. An ultraviolet sterilization unit that sterilizes water using a deep ultraviolet LED as a light source, a power supply unit that has a secondary battery that is charged by the supplied power while receiving power supply from outside to drive the deep ultraviolet LED, and the ultraviolet sterilization A water outflow part that causes the water sterilized by the part to flow out, and normally the electric power supplied from the outside is supplied to the deep ultraviolet LED, and the electric power supplied from the outside is cut off from the secondary battery. together provided to supply control for supplying power to the deep-ultraviolet LED from despite the secondary battery electric power from the outside is supplied when the water outflow conditions from the outflow section has reached a predetermined condition The water purifier characterized by having a part.

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