CN111693805A - Detection circuit and detection method for detecting operating state of sterilization device - Google Patents
Detection circuit and detection method for detecting operating state of sterilization device Download PDFInfo
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- CN111693805A CN111693805A CN202010465404.3A CN202010465404A CN111693805A CN 111693805 A CN111693805 A CN 111693805A CN 202010465404 A CN202010465404 A CN 202010465404A CN 111693805 A CN111693805 A CN 111693805A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L9/00—Disinfection, sterilisation or deodorisation of air
- A61L9/16—Disinfection, sterilisation or deodorisation of air using physical phenomena
- A61L9/18—Radiation
- A61L9/20—Ultra-violet radiation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/26—Testing of individual semiconductor devices
- G01R31/2607—Circuits therefor
- G01R31/2632—Circuits therefor for testing diodes
- G01R31/2635—Testing light-emitting diodes, laser diodes or photodiodes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/52—Testing for short-circuits, leakage current or ground faults
Abstract
The invention relates to a detection circuit and a detection method for detecting the operation state of a sterilization device, wherein the sterilization device comprises a plurality of sterilization devices, and the detection circuit comprises: the main circuit is provided with a VCC power supply and a constant current source, and the VCC power supply provides a driving voltage for the constant current source; the constant current source provides constant current for the main circuit; the branch circuit comprises a first branch circuit and a second branch circuit, and the first branch circuit is provided with a plurality of standard resistors connected in series; the plurality of sterilizing devices are connected in series on the second branch circuit; the first branch circuit and the second branch circuit are connected in parallel and then are connected in series with the main circuit; the detection module is used for detecting the input voltage of any standard resistor or the current value of the second branch circuit, and the operation state of the sterilization device is judged according to the detection result of the detection module. The technical scheme of the invention can accurately judge the operation mode and the fault state of the sterilization device, ensure that a user or maintenance personnel cannot be damaged due to the opening of the UVC when the sterilization device is dismounted, and simultaneously can quickly judge the fault and take corresponding maintenance measures.
Description
Technical Field
The invention belongs to the technical field of sterilization, and particularly relates to a detection circuit and a detection method for detecting the operation state of a sterilization device.
Background
At present, with the improvement of the scientific and technological level, the quality of life of the people is gradually improved, the consciousness on health is also gradually increased, indoor air sterilization products are also gradually increased, but for products which utilize invisible light to sterilize such as UVC sterilization functions, ultraviolet light generated by the products is invisible, and if a fault occurs, the ultraviolet light is difficult to be perceived by a user, so that the sterilization effect is influenced. Meanwhile, the ultraviolet rays are harmful to the skin, when a user cleans an air conditioner or a maintenance worker maintains the air conditioner, the user may not know that the UVC function is started, and the ultraviolet rays irradiate the skin of the user to cause certain damage and influence the experience effect.
The present invention has been made in view of the above circumstances.
Disclosure of Invention
The invention aims to solve the technical problems of accurately judging the operation mode and the fault state of the sterilization device, ensuring that a user or maintenance personnel cannot be damaged due to the opening of the UVC when the sterilization device is dismounted, and simultaneously quickly judging the fault and taking corresponding maintenance measures.
In order to solve the above technical problem, the present invention provides a detection circuit for detecting an operation state of a sterilization apparatus, wherein the sterilization apparatus comprises a plurality of sterilization devices, including
The main circuit is provided with a VCC power supply and a constant current source, and the VCC power supply provides a driving voltage for the constant current source; the constant current source provides constant current for the main circuit;
the branch circuit comprises a first branch circuit and a second branch circuit, wherein the first branch circuit is provided with a plurality of standard resistors connected in series; the plurality of sterilizing devices are connected in series on the second branch circuit; the first branch circuit and the second branch circuit are connected in parallel and then are connected in series with the main circuit;
and the detection module is used for detecting the input voltage of any standard resistor or the current value of the second branch circuit, and judging the operating state of the sterilization device according to the detection result of the detection module.
Further optionally, the sterilizing device is an ultraviolet LED lamp.
The invention also provides a method for detecting the operating state of the sterilizing device,
the detection module is a sampling circuit, and the sampling circuit is used for detecting the input voltage of any standard resistor; setting n standard resistors which are respectively R1 and R2 … Rn in series on the first branch circuit, wherein n is more than or equal to 2; the constant current source generates a constant current I, and the sampling circuit detects an input voltage U of Rn;
the detection method comprises the following steps: and judging the working mode and/or the fault state of the sterilization device according to the magnitude of the input voltage U of the Rn detected by the sampling circuit.
Further optionally, the operation modes of the sterilization apparatus include a low power mode, a normal power mode and a high power mode, the current flowing through the plurality of sterilization devices in the low power mode is Ia, the current flowing through the plurality of sterilization devices in the normal power mode is Ib, the current flowing through the plurality of sterilization devices in the high power mode is Ic, Ia < Ib < Ic;
when U is equal to (I-Ia) Rn, judging that the current sterilization device operates at low power;
when U is equal to (I-Ib) Rn, judging that the current sterilization device operates at normal power;
and when U is equal to (I-Ic) Rn, judging that the current sterilization device operates at high power.
Further optionally, m sterilizing devices are set to be connected in series on the second branch circuit, and the equivalent resistance of each sterilizing device is RL;
when U is I Rn, judging that the sterilization device has an open circuit fault;
and when U is equal to Rn I, (m-k) RL/(R1+ R2+ … + Rn + (m-k) RL)), judging that k sterilizing devices in the sterilizing device have short circuit faults, wherein k is more than 0 and less than or equal to m.
The invention also provides a method for detecting the operating state of the sterilization device, wherein the detection module is a current detection device which is used for detecting the current value on the second branch circuit; setting the constant current generated by the constant current source as I, and setting the detection value of the current detection device as I2;
the detection method comprises the following steps: and judging whether the sterilization device normally works or not according to the current value I2 of the second branch circuit detected by the current detection device.
Further optionally, the operation modes of the sterilization apparatus include a low power mode, a normal power mode and a high power mode, the current flowing through the plurality of sterilization devices in the low power mode is Ia, the current flowing through the plurality of sterilization devices in the normal power mode is Ib, the current flowing through the plurality of sterilization devices in the high power mode is Ic, Ia < Ib < Ic;
and when the detection Ia is more than or equal to I2 and less than or equal to Ic, judging that the sterilization device normally operates, otherwise, judging that the sterilization device has a fault.
Further preferably, when Ia is less than or equal to I2 is less than or equal to Ic, the working mode of the sterilization device is judged according to the current value I2 of the second branch circuit;
if the I2 is equal to Ia, the sterilization device is judged to be operated at low power;
if I2 is Ib, judging that the sterilization device operates at normal power;
if I2 is Ic, the sterilization device is determined to be operating at high power.
Further, m sterilizing devices are set to be connected in series on the second branch circuit, and the equivalent resistance of each sterilizing device is RL;
when I2 < Ia or I2 > Ic, the fault state of the sterilization device is judged according to the current value I2 of the second branch circuit;
if I2 is equal to 0, judging that the sterilizing device has an open circuit fault;
and if I2 is I-I ((m-k) RL/(R1+ R2+ … + Rn + (m-k) RL)), determining that k sterilizing devices in the sterilizing device have short circuit faults, and the k is more than 0 and less than or equal to m.
Further optionally, the sterilization device includes a display screen, and when the sterilization device is detected to be in different working modes or different fault states, the display screen displays corresponding working mode information or fault state information.
Further preferably, the sterilization device further comprises a control key for controlling the display screen to display the working mode or the fault information of the sterilization device, wherein the control key is a combined key or an independent key.
The invention also provides a sterilization device which adopts the detection circuit or the detection method.
The invention also provides electric equipment which comprises the sterilizing device.
After adopting the technical scheme, compared with the prior art, the invention has the following beneficial effects:
1. the sterilization device can carry out self-checking on the fault condition, and once the UVC fails, the UVC can be visually perceived by a user and corresponding maintenance measures can be taken so as to ensure the sterilization quality.
2. The sterilization device provided by the invention can judge whether the sterilization device normally works or not by detecting the running state of the sterilization device, so that a user or maintenance personnel can be ensured not to be injured due to the opening of the UVC when the sterilization device is dismounted.
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention, are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without limiting the invention to the right. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:
FIG. 1: the detection circuit diagrams of embodiment 1 and embodiment 2 of the invention are shown.
FIG. 2: is a control flow chart of embodiment 3 of the present invention.
FIG. 3: is a schematic view of a display interface in embodiment 4 of the present invention.
FIG. 4: is a schematic view of a display interface control key in embodiment 4 of the present invention.
Wherein: 1. is an air conditioner; 11. is a display screen; 2. is a remote controller; 21. and (6) combining the keys.
It should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but to illustrate it by a person skilled in the art with reference to specific embodiments.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and the following embodiments are used for illustrating the present invention and are not intended to limit the scope of the present invention.
In the description of the present invention, it should be noted that the terms "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "contacting," and "communicating" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1
The embodiment provides a detection circuit for the operating state of a sterilization device, and the sterilization device of the embodiment comprises a plurality of sterilization devices, and the sterilization device performs sterilization through the plurality of sterilization devices. The sterilizing device in this embodiment is a plurality of ultraviolet LED lamps, and as shown in fig. 1, the detection circuit includes a main circuit, on which a VCC power supply and a constant current source are provided, the VCC power supply providing a driving voltage for the constant current source; the constant current source provides constant current for the main circuit and is used for driving the whole sterilization device; the circuit also comprises two branch circuits, namely a first branch circuit and a second branch circuit, wherein the first branch circuit is provided with a plurality of standard resistors connected in series, and the resistance value of each standard resistor is known; the second branch circuit is provided with a plurality of ultraviolet LED lamps which are connected in series, and the sterilization device performs sterilization by emitting ultraviolet light through the ultraviolet LED lamps in the sterilization process; the first branch circuit and the second branch circuit are connected in parallel and then are connected in series with the main circuit; the detection module is used for detecting the input voltage of any standard resistor or detecting the current value of the second branch circuit. The sterilization device judges the running state of the sterilization device according to the detection result of the detection module.
In one embodiment, the detection circuit in fig. 1 is provided with an ADC sampling circuit for detecting a resistance value of one of the standard resistors, and the sterilization apparatus determines an operation state of the sterilization apparatus according to a detection result of the ADC sampling circuit. In another embodiment, a current detection device is disposed on the second branch circuit for detecting a value of current flowing through the second branch circuit, and the sterilization device determines an operation state of the sterilization device according to a detection result of the current detection device.
Example 2
The present embodiment is a detection method for detecting an operating state of a sterilization apparatus based on the detection circuit of embodiment 1.
The detection module is an ADC sampling circuit which is used for detecting the input voltage of any standard resistor; setting n standard resistors which are respectively R1 and R2 … Rn in series on the first branch circuit, wherein n is more than or equal to 2; the constant current generated by the constant current source is I, and the sampling circuit detects the input voltage of Rn as U; the detection method comprises the following steps: and determining the working mode and/or the fault state of the sterilization device according to the magnitude of the input voltage U of Rn detected by the sampling circuit.
Further optionally, the operating mode of the sterilization device includes a low power mode, a normal power mode and a high power mode, the current flowing through the plurality of ultraviolet LED lamps in the low power mode is Ia, the current flowing through the plurality of ultraviolet LED lamps in the normal power mode is Ib, the current flowing through the plurality of ultraviolet LED lamps in the high power mode is Ic, Ia < Ib < Ic; when U is equal to (I-Ia) Rn, judging that the current sterilization device operates at low power; when U is equal to (I-Ib) Rn, judging that the current sterilization device operates at normal power; and when U is equal to (I-Ic) Rn, judging that the current sterilization device operates at high power.
Specifically, as shown in the circuit diagram of fig. 1, two standard resistors, R1 and R2, are disposed in the first branch. I1 is the current through resistors R1, R2, I2 is the current through the plurality of uv lamp LEDs, I — I1+ I2, where I is constant. The ADC sampling circuit monitors the input voltage of the R2, and transmits voltage data to a main board of the sterilization device at any time. The sterilizing device has three power operation modes, and the corresponding currents flowing through the ultraviolet LED lamp are respectively as follows: low power Ia, normal power Ib, high power Ic. Wherein I2 is I-U/R2. When all the ultraviolet LEDs in the sterilizing device work normally, namely the current I2 actually flowing through the ultraviolet LED lamp meets the condition that Ia is less than or equal to I2 is less than or equal to Ic.
a. When the ultraviolet LED lamp is operated at the minimum power, I2 ═ Ia, I1 ═ I-Ia, and U ═ I1 ═ R2, and the detected voltage U ═ I-Ia) × R2, it is proved that the ultraviolet LED lamp is operated at the minimum power.
b. When the ultraviolet LED lamp operates at normal power, I2 is Ib, I1 is I-Ib, U is I1 is R2, and when the detection voltage U is (I-Ib) R2, the ultraviolet LED lamp is proved to operate at normal power.
c. When the ultraviolet LED lamp runs at the maximum power, I2 ═ Ic, I1 ═ I-Ic, U ═ I1 ═ R2, and the detection voltage U ═ I-Ic) × (R2, the ultraviolet LED lamp is proved to run at the maximum power.
On the basis of the scheme, m ultraviolet LED lamps are further optionally set to be connected in series on the second branch circuit, and the equivalent resistance of each ultraviolet LED lamp is RL;
when U is I Rn, judging that the sterilization device has an open circuit fault;
and when U is equal to Rn I, (m-k) RL/(R1+ R2+ … + Rn + (m-k) RL)), judging that k ultraviolet LED lamps in the sterilizing device have short circuit faults, wherein k is more than 0 and less than or equal to m.
Specifically, when any one of the m ultraviolet LED lamps is open-circuited, I2 ═ 0, I1 ═ I, and U ═ I1 × Rn, and when the detection voltage U ═ I ═ Rn), it is determined that the LED has an open-circuit fault.
When k ultraviolet LED lamps in the m ultraviolet LED lamps are short-circuited, the equivalent resistance of the k ultraviolet LED lamps is 0, the total resistance of the branch circuit through which I2 flows is (m-k) × RL, because the parallel voltage is equal,
i.e., I1 ═ (R1+ R2+ … + Rn) ═ I2 × (m-k) × RL, and I ═ I1+ I2,
i1 ═ I (m-k) × RL/((R1+ R2+ … + Rn) + (m-k) × RL)), U ═ I1 ═ Rn,
u ═ Rn × (m-k) × RL/((R1+ R2+ … + Rn) + (m-k) × RL)), and it is determined that the ultraviolet LED lamp has k short circuits;
as shown in fig. 2, it is assumed that three ultraviolet LED lamps, i.e., LED1, LED2, and LED3, are disposed on the second branch circuit, the equivalent resistances of the three ultraviolet LED lamps are RL,
a. when any one ultraviolet LED lamp in the LED is broken, I2 is 0, I1 is I, and U1 is R2, and when the detection voltage U is (I R2), the LED is judged to have broken fault.
b. When the ultraviolet LED lamp has a short circuit, the equivalent resistance RL of the short-circuited ultraviolet LED lamp is 0, the total resistance of the branch circuits through which I2 flows is 2 RL, because the parallel circuit voltage is equal,
i.e., I1 ═ I2 ═ I2 ×, R1+ R2, and I ═ I1+ I2,
i1 ═ I (2 × RL/(R1+ R2+2 × RL)), I2 ═ I-I1 can be obtained,
then U-R2I (2 RL/(R1+ R2+2 RL)), and it is determined that there is a short circuit in the UV LED lamp;
c. when the ultraviolet LED lamp has two short circuits, the equivalent resistance RL of the two short circuits is 0, and the total resistance of the branch circuits through which I2 flows is RL, because the parallel circuit voltages are equal,
i.e., I1 ═ I2 ═ RL, (R1+ R2), and I ═ I1+ I2,
i1 ═ I (RL/(R1+ R2+ RL)), I2 ═ I1,
then U-R2I, (RL/(R1+ R2+ RL)), the uv LED lamp is judged to have two short circuits.
d. When all the ultraviolet LED lamps are short-circuited, I2 is equal to I, I1 is equal to 0, and U is equal to I1 and R2, and when the detection voltage U is equal to 0, all the ultraviolet LED lamps are judged to be short-circuited.
e. When the current does not accord with the complaint judgment, the UVC module is judged to be other faults, and 'UU' is displayed by 'double eight'.
Further optionally, the sterilization apparatus includes a display screen, and when it is detected that the sterilization apparatus is in a different operation mode or a different fault state, the display screen displays corresponding operation mode information or fault state information.
For example, the display screen displays the "I0" code when the germicidal device is detected to be operating at low power; when the sterilization device is detected to run at normal power, the display screen displays 'I1'; when the sterilization device is operated at the maximum power, the display screen displays 'I2'
Open circuit fault, display screen shows "-"; when the sterilization device is detected to have a short circuit, the display screen displays '01'; when two ultraviolet LED lamps in the detection sterilizing device are short-circuited, the display screen displays '02'; judging whether all the LED lamps are short-circuited, and displaying '03' on a display screen; and when the detection result does not accord with any judgment result, judging that the UVC module is in other faults, and displaying the UU on the display screen.
In a specific implementation process, the state information displayed on the display screen in the fault states of different working states on the display screen is not limited to this, and can be set according to actual requirements. User or maintainer can learn sterilizing equipment's running state and fault information fast according to the state information that the display screen shows, can not receive the injury because UVC opens when avoiding ensureing that user or maintainer tear the machine, and user or maintenance are arbitrary can audio-visually be perceived corresponding fault state and take corresponding maintenance measure simultaneously to guarantee the quality of disinfecting.
On the basis of the above scheme, further optionally, the sterilization device further comprises a control key for controlling the display screen to display the working mode or the fault information of the sterilization device, and the control key is a combined key or an independent key. When a user or any overhaul needs to know whether the sterilization device works normally or fails, the operating state of the sterilization device is displayed on the display screen directly by pressing the control key of the display screen, after the user presses the key, when the sterilization device operates normally, the display screen displays the operating mode (low, normal and high power) of the sterilization device, and when the sterilization device fails, the failure information is correspondingly displayed. And when the condition that the display screen needs to exit the running state is displayed, the user presses any other key to exit the mode.
The key can be a control key directly arranged on the sterilization device or a remote controller for controlling the sterilization device to open and close. The key can be a combined key based on the existing key or a special key is arranged to control the display screen to display the running state of the sterilization device.
Furthermore, when the operation mode or the fault state of the sterilization device is detected, the detection result is transmitted to the intelligent terminal bound with the sterilization device for the user to check. Simultaneously, the user can select simultaneously that sterilizing equipment opens or closes through intelligent terminal to and the power of opening, can select high-power degerming when the degerming needs to be strengthened to the user.
Example 3
The present embodiment is another detection method for detecting the operating state of the sterilization apparatus based on the detection circuit of embodiment 1.
The detection module is a current detection device, such as an ammeter arranged on the second branch circuit. The current detection device is used for detecting the current value on the second branch circuit; setting the constant current generated by the constant current source as I, and setting the detection value of the current detection device as I2; the detection method comprises the following steps: and determining whether the sterilization device works normally according to the current value I2 of the second branch circuit detected by the current detection device.
Further optionally, the operating mode of the sterilization device includes a low power mode, a normal power mode and a high power mode, the current flowing through the plurality of ultraviolet LED lamps in the low power mode is Ia, the current flowing through the plurality of ultraviolet LED lamps in the normal power mode is Ib, the current flowing through the plurality of ultraviolet LED lamps in the high power mode is Ic, Ia < Ib < Ic; and when the detection Ia is more than or equal to I2 and less than or equal to Ic, judging that the sterilization device normally operates, otherwise, judging that the sterilization device has a fault. Whether sterilizing equipment is in operation can be judged through the size that detects the electric current that flows through the second branch circuit to this embodiment to can avoid user or maintainer can not open and receive the injury because of UVC when tearing open the machine.
Specifically, when Ia is less than or equal to I2 and less than or equal to Ic, the working mode of the sterilization device is judged according to the current value I2 of the second branch circuit; if the I2 is equal to Ia, the sterilization device is judged to be operated at low power; if I2 is Ib, judging that the sterilization device operates at normal power; if I2 is Ic, the sterilization device is determined to be operating at high power.
Further optionally, m ultraviolet LED lamps are set to be connected in series on the second branch circuit, and the equivalent resistance of each ultraviolet LED lamp is RL; when I2 < Ia or I2 > Ic, the fault state of the sterilization device is judged according to the current value I2 of the second branch circuit; if I2 is equal to 0, judging that the short-circuit fault occurs in the sterilization device; and if I2 is I-I ((m-k) RL/(R1+ R2+ … + Rn + (m-k) RL)), determining that k ultraviolet LED lamps in the sterilizing device have short circuit fault, and the k is more than 0 and less than or equal to m.
Specifically, when any one of the m ultraviolet LED lamps is turned off, I2 is 0, and it is determined that an open-circuit fault has occurred in the LED.
If the current flowing through the first branch is I1, I1+ I2. When k ultraviolet LED lamps in the m ultraviolet LED lamps are short-circuited, the equivalent resistance of the k ultraviolet LED lamps is 0, the total resistance of the branch circuit through which I2 flows is (m-k) × RL, because the parallel voltage is equal,
i.e., I1 ═ (R1+ R2+ … + Rn) ═ I2 × (m-k) × RL, and I ═ I1+ I2,
i1 ═ I (RL/(R1+ R2+ RL)), I2 ═ I1,
and if the I2 is I-I ((m-k) RL/(R1+ R2+ … + Rn + (m-k) RL)), the k ultraviolet LED lamps are judged to be short-circuited.
On the basis of the above scheme, further optionally, the sterilization device further comprises a control key for controlling the display screen to display the working mode or the fault information of the sterilization device, and the control key is a combined key or an independent key. When a user or any overhaul needs to know whether the sterilization device works normally or fails, the operating state of the sterilization device is displayed on the display screen directly by pressing the control key of the display screen, after the user presses the key, when the sterilization device operates normally, the display screen displays the operating mode (low, normal and high power) of the sterilization device, and when the sterilization device fails, the failure information is correspondingly displayed. And when the condition that the display screen needs to exit the running state is displayed, the user presses any other key to exit the mode.
The key can be directly arranged on a control key of the sterilizing device or on a remote controller for controlling the opening and closing of the sterilizing device. The key can be a combined key based on the existing key or a special key is arranged to control the display screen to display the running state of the sterilization device.
Furthermore, when the operation mode or the fault state of the sterilization device is detected, the detection result is transmitted to the intelligent terminal bound with the sterilization device for the user to check. Simultaneously, the user can select simultaneously that sterilizing equipment opens or closes through intelligent terminal to and the power of opening, can select high-power degerming when the degerming needs to be strengthened to the user.
Two resistors R1 and R2 are arranged in the first branch circuit, three ultraviolet LED lamps are arranged in the second branch circuit, and the equivalent resistors of the three LED lamps are all RL. As shown in the flow chart of FIG. 2, when the current value I2 of the second branch circuit is detected to fall within the range Ia ≦ I2 ≦ Ic, the sterilization apparatus is determined to be operating normally, otherwise, the sterilization apparatus is determined to be malfunctioning.
When Ia is not more than I2 is not more than Ic, when I2 is detected as Ia, the sterilization device is judged to be operated at low power, and 'double eight' on the display screen displays 'I0'.
When the detected I2 is Ib, the sterilization device is judged to be operated at normal power, and the ' double eight ' display ' on the display screen is I1;
when the detection result is that I2 is Ic, the sterilization device is judged to be operated at high power, and the display screen displays I2 in a double eight mode;
when I2 is less than Ia or I2 is more than Ic, when I2 is detected to be 0, at least one ultraviolet LED is judged to be disconnected, and double eight display on the display screen is displayed.
When I2 is I-I, (2 × RL/(R1+ R2+2 × RL)), it is determined that one ultraviolet LED is short-circuited, and "double eight" on the display screen indicates "01".
When I2 is I-I (× RL/(R1+ R2+ × RL)), it is determined that there is a short circuit between the two ultraviolet LEDs, and "double eight" on the display screen displays "02".
And when the detection result does not accord with any judgment result, judging that the UVC module is in other faults, and displaying the UU on the display screen.
Example 4
As shown in fig. 3, the air conditioner 1 is provided with a sterilization device, and the sterilization device adopts the detection circuit of embodiment 1 or adopts the detection methods of embodiments 2 and 3. The air conditioner 1 comprises a cabinet body, wherein a display screen 11 is arranged on the cabinet body, and the display screen 11 is used for displaying the temperature, the operation mode and the operation state of a sterilization device. In addition, the air conditioner 1 further comprises a remote controller 2 for controlling the opening and closing of the air conditioner, as shown in fig. 4, a plurality of keys are arranged on the remote controller 2, and the display screen 11 is controlled to display the operating state of the sterilization device by arranging an independent key for controlling the display screen 11 to display the operating state of the sterilization device on the remote controller 2 or arranging a combined key 21 on the basis of the existing keys. In practical implementation, the combination key is not limited to the combination mode in fig. 4, and may also be other key combination modes.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (13)
1. A detection circuit for detecting the operation state of a sterilization apparatus, the sterilization apparatus including a plurality of sterilization devices, is characterized by comprising
The main circuit is provided with a VCC power supply and a constant current source, and the VCC power supply provides a driving voltage for the constant current source; the constant current source provides constant current for the main circuit;
the branch circuit comprises a first branch circuit and a second branch circuit, wherein the first branch circuit is provided with a plurality of standard resistors connected in series; the plurality of sterilizing devices are connected in series on the second branch circuit; the first branch circuit and the second branch circuit are connected in parallel and then are connected in series with the main circuit;
and the detection module is used for detecting the input voltage of any standard resistor or the current value of the second branch circuit, and judging the operating state of the sterilization device according to the detection result of the detection module.
2. The detection circuit of claim 1, wherein the germicidal device is an ultraviolet LED lamp.
3. A sterilization apparatus operation state detection method based on the detection circuit of claim 1 or 2,
the detection module is a sampling circuit, and the sampling circuit is used for detecting the input voltage of any standard resistor; setting n standard resistors which are respectively R1 and R2 … Rn in series on the first branch circuit, wherein n is more than or equal to 2; the constant current source generates a constant current I, and the sampling circuit detects an input voltage U of Rn;
the detection method comprises the following steps: and judging the working mode and/or the fault state of the sterilization device according to the magnitude of the input voltage U of the Rn detected by the sampling circuit.
4. The detection method as claimed in claim 3, wherein the operation modes of the sterilization apparatus include a low power mode, a normal power mode and a high power mode, wherein the current flowing through the plurality of sterilization devices in the low power mode is Ia, the current flowing through the plurality of sterilization devices in the normal power mode is Ib, the current flowing through the plurality of sterilization devices in the high power mode is Ic, and Ia < Ib < Ic;
when U is equal to (I-Ia) Rn, judging that the current sterilization device operates at low power;
when U is equal to (I-Ib) Rn, judging that the current sterilization device operates at normal power;
and when U is equal to (I-Ic) Rn, judging that the current sterilization device operates at high power.
5. The detection method according to claim 3, wherein m sterilizing devices are set in series on the second branch circuit, and the equivalent resistance of each sterilizing device is RL;
when U is I Rn, judging that the sterilization device has an open circuit fault;
and when U is equal to Rn I, (m-k) RL/(R1+ R2+ … + Rn + (m-k) RL)), judging that k sterilizing devices in the sterilizing device have short circuit faults, wherein k is more than 0 and less than or equal to m.
6. A method for detecting the operating status of a sterilization apparatus based on the detection circuit of claim 1 or 2, wherein the detection module is a current detection device, and the current detection device is used to detect the current value of the second branch circuit; setting the constant current generated by the constant current source as I, and setting the detection value of the current detection device as I2;
the detection method comprises the following steps: and judging whether the sterilization device normally works or not according to the current value I2 of the second branch circuit detected by the current detection device.
7. The detection method according to claim 6, wherein the operation modes of the sterilization apparatus include a low power mode in which the current flowing through the plurality of sterilization devices is Ia, a normal power mode in which the current flowing through the plurality of sterilization devices is Ib, and a high power mode in which the current flowing through the plurality of sterilization devices is Ic, Ia < Ib < Ic;
and when the detection Ia is more than or equal to I2 and less than or equal to Ic, judging that the sterilization device normally operates, otherwise, judging that the sterilization device has a fault.
8. The detection method according to claim 7, wherein when Ia ≦ I2 ≦ Ic, the operation mode of the sterilization apparatus is further determined according to the magnitude of the current value I2 of the second branch circuit;
if the I2 is equal to Ia, the sterilization device is judged to be operated at low power;
if I2 is Ib, judging that the sterilization device operates at normal power;
if I2 is Ic, the sterilization device is determined to be operating at high power.
9. The detection method according to claim 7, wherein m sterilizing devices are set in series on the second branch circuit, and the equivalent resistance of each sterilizing device is RL;
when I2 < Ia or I2 > Ic, the fault state of the sterilization device is judged according to the current value I2 of the second branch circuit;
if I2 is equal to 0, judging that the sterilizing device has an open circuit fault;
and if I2 is I-I ((m-k) RL/(R1+ R2+ … + Rn + (m-k) RL)), determining that k sterilizing devices in the sterilizing device have short circuit faults, and the k is more than 0 and less than or equal to m.
10. The monitoring method according to any one of claims 3 to 9, wherein the sterilization apparatus includes a display screen, and when the sterilization apparatus is detected to be in a different operation mode or a different fault state, the display screen displays corresponding operation mode information or fault state information.
11. The detecting method according to claim 10, wherein the sterilization device further comprises a control button for controlling the display screen to display the operation mode or failure information of the sterilization device, and the control button is a combination button or an independent button.
12. A sterilization apparatus using the detection circuit according to claim 1 or 2 or the detection method according to any one of claims 3 to 11.
13. An electrical appliance characterized in that it comprises a sterilisation apparatus according to claim 12.
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Application publication date: 20200922 |