CN114681634A - Control method of sterilization module and household appliance with sterilization module - Google Patents

Abstract

The invention provides a sterilization module control method and a household appliance with the same, wherein the sterilization module control method comprises the following steps: acquiring the intensity of ultraviolet light when the ultraviolet light source works; obtaining the concentration of negative ions generated by the photocatalyst structure; and if the ultraviolet light intensity is lower than a first threshold value or the negative ion concentration is lower than a second threshold value, an alarm is given out.

Description

Control method of sterilization module and household appliance having the same

technical field

The invention relates to a sterilization module, in particular to a sterilization module capable of detecting the performance of the sterilization module and a home appliance having the sterilization module.

Background technique

In order to improve the quality of life, sterilization modules are widely used in refrigerators. For example, photocatalytic technology is used for sterilization, and the combination of UVA or UVC ultraviolet light and photocatalytic materials can greatly improve the preservation performance of refrigerators such as sterilization, odor removal, and pesticide residue removal.

However, the sterilization effect of the sterilization module decreases with use. For example, traditional photocatalytic materials have two main defects, low purity and easy oxide fall off. The reason is that when the photocatalytic titanium dioxide powder is processed into a coating, the dispersant and binder used are wrapped on the photocatalytic surface. , reducing its reaction efficiency, and with the photocatalytic reaction, the released strong oxygen radicals not only decompose pollutants, but also decompose the coating substrate used as a binder, so with use, the photocatalysis will gradually fall off, and the efficiency will be further reduce.

However, none of the currently used sterilization modules have an effect feedback function.

In view of this, it is necessary to provide a new sterilization module and a household appliance having the sterilization module to solve the above problems.

SUMMARY OF THE INVENTION

The present invention aims to solve at least one of the technical problems existing in the prior art, thereby providing a sterilization module and a home appliance having the sterilization module.

For realizing one of the above-mentioned purposes of the invention, the present invention adopts the following technical solutions:

A control method of a sterilization module, comprising the following steps:

Obtain the ultraviolet light intensity when the ultraviolet light source is working;

Obtain the negative ion concentration generated by the photocatalyst structure;

If the intensity of ultraviolet light is lower than the first threshold, or the concentration of negative ions is lower than the second threshold, an alarm is issued.

Further, if the ultraviolet light intensity is lower than the first threshold value, and the negative ion concentration is not lower than the second threshold value, the distance control unit is activated to reduce the distance between the ultraviolet light source and the photocatalyst structure until the ultraviolet light intensity is not lower than the second threshold value. first threshold.

Further, if the distance between the ultraviolet light source and the photocatalyst structure is adjusted to a minimum distance, and the ultraviolet light intensity is still lower than the first threshold, the ultraviolet light source is prompted to be replaced.

Further, if the intensity of the ultraviolet light is not lower than the first threshold, and the concentration of negative ions is lower than the second threshold, the fan is adjusted to a full-power air volume state.

Further, the fan works for a predetermined time under the state of full power and air volume. If the negative ion concentration is still lower than the second threshold, it will prompt to replace or clean the photocatalyst structure; if the negative ion concentration is not lower than the second threshold, reduce the fan power to The sterilization module is in the normal sterilization state.

Further, if the ultraviolet light intensity is lower than the first threshold value and the negative ion concentration is lower than the second threshold value, the distance control unit is activated to reduce the distance between the ultraviolet light source and the photocatalyst structure until the ultraviolet light intensity is not lower than the first threshold. A threshold, continue to work for a predetermined time.

Further, if the distance between the ultraviolet light source and the photocatalyst structure is adjusted to a minimum distance, and the ultraviolet light intensity is still lower than the first threshold, the ultraviolet light source is prompted to be replaced.

Further, the ultraviolet light intensity is not lower than the first threshold value, and after continuing to work for a predetermined time, if the negative ion concentration is still lower than the second threshold value, the fan is adjusted to the full power air volume state.

Further, the fan works for a predetermined time under the state of full power and air volume. If the negative ion concentration is still lower than the second threshold, it will prompt to replace or clean the photocatalyst structure; if the negative ion concentration is not lower than the second threshold, reduce the fan power to The sterilization module is in the normal sterilization state.

Further, the intensity of the ultraviolet light is not lower than the first threshold, and after continuing to work for a predetermined time, if the concentration of negative ions is not lower than the second threshold, it indicates that the sterilization module is in a normal state.

A household appliance includes the control method of the above-mentioned sterilization module.

The beneficial effects of the present invention are: the sterilization module of the present invention can timely feedback the working state of the sterilization module by detecting the performance of the ultraviolet light source and the amount of negative ions generated by the photocatalyst structure under the ultraviolet light source, so as to judge the ultraviolet light source and the photocatalyst. The performance of the structure should be cleaned or replaced in time so as not to affect the sterilization effect.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only It is an embodiment of the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to the provided drawings without creative work.

1 is a schematic structural diagram of a sterilization module in a preferred embodiment of the present invention;

2 is a schematic structural diagram of a sterilization module in another preferred embodiment of the present invention;

3 is a schematic diagram of the cooperation between the distance control unit and the ultraviolet light source according to a preferred embodiment of the present invention;

FIG. 4 is a schematic diagram of the cooperation between the distance control unit and the ultraviolet light source according to another preferred embodiment of the present invention.

100-sterilization module, 1-ultraviolet light source, 2-ultraviolet light intensity sensor, 3-photocatalyst structure, 4-negative ion sensor, 5-distance control unit, 51-conveyor belt, 52-adjustment frame, 53-card slot, 54-card Firmware, 55-fixed frame, 56-elastic part, 6-shell, 61-air inlet, 62-air outlet, M-fan M

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Referring to FIGS. 1 to 4 , the sterilization module 100 of the present invention includes an ultraviolet light source 1 , an ultraviolet light intensity sensor 2 for detecting the performance of the ultraviolet light source 1 , a photocatalyst structure 3 , and a negative ion sensor located around the photocatalyst structure 3 . 4. Fan M and control unit. The ultraviolet light source 1, the ultraviolet light intensity sensor 2, the photocatalyst structure 3, the negative ion sensor 4, and the fan M are all connected in communication with the control unit, and the operation of the entire sterilization module 100 is controlled by the control unit.

The ultraviolet light source 1 is any light source that can emit UVA or UVC ultraviolet light, such as an ultraviolet lamp.

The ultraviolet light intensity sensor 2 detects the ultraviolet light emitted by the ultraviolet light source 1, and can judge its sterilization effect. Preferably, the ultraviolet light intensity sensor 2 is located between the ultraviolet light source 1 and the photocatalyst structure 3, and detects the ultraviolet light irradiated by the ultraviolet light source 1 to the photocatalyst module, so as to detect whether the photocatalyst structure 3 is effective Works under UV light.

Further, the distance between the ultraviolet light intensity sensor 2 and the photocatalyst structure 3 is smaller than the distance between the ultraviolet light intensity sensor 2 and the ultraviolet light source 1 , and the distance between the ultraviolet light intensity sensor 2 and the photocatalyst structure 3 is smaller than that of the ultraviolet light intensity sensor 2 . The smaller the distance is, the smaller the gap between the measured ultraviolet light intensity and the ultraviolet light intensity reaching the photocatalyst structure 3 is, and the judgment of the sterilization performance of the photocatalyst structure 3 is more accurate.

The photocatalyst structure 3 is located on the light-emitting side of the ultraviolet light source 1, and the photocatalyst structure 3 is located on the air outlet side of the fan M. The photocatalyst structure 3 generates strong oxygen radicals, also called negative ions, under ultraviolet light. Under the action of the fan M, the air passing through it is sterilized and deodorized.

Preferably, the light touch structure includes a bracket and a photocatalytic material coated on the bracket, the photocatalytic material is a titanium dioxide graphene composite material, and the titanium dioxide graphene composite material is mainly made of the titanium dioxide, Adding graphene to enhance the photocatalytic effect, compared with the traditional titanium dioxide photocatalyst, the sterilization effect is better.

The negative ion sensor 4 is located on the side of the photocatalyst structure 3 away from the fan M, that is, the negative ion sensor 4 is located at the downwind of the photocatalyst structure 3, and detects the negative ions generated after the ultraviolet lamp irradiates the photocatalytic composite material. concentration.

Preferably, the negative ion sensor 4 is placed in the center relative to the photocatalyst structure 3, and the distance from the photocatalyst structure 3 is preferably within 2cm to 4cm. The distance is small, which can reduce the negative ions generated by harmful substances in the air How much influence to ensure the accuracy of the test. Take the number when the negative ion sensor 4 starts to work, calculate the average number of negative ions within 1 minute, and record it as M1, and the negative ion sensor 4 can be started once a day. When the average number of negative ions within 1 minute of the test is less than 70% of M1, it is considered that the amount of negative ions generated by the photocatalyst structure 3 under the current ultraviolet light source 1 is insufficient.

The inventor found in the research that the intensity of the ultraviolet light emitted by the ultraviolet light source 1 varies with the distance between the ultraviolet light source 1 and the ultraviolet light source 1 , and the luminous intensity of the ultraviolet light source 1 will weaken after working for a period of time. In view of this, on the basis of the above-mentioned embodiment, the sterilization module 100 further includes a distance regulating unit 5 communicatively connected with the control unit, for regulating at least one of the ultraviolet light source 1 and the photocatalyst structure 3 position to adjust the distance between the two, so as to ensure that the ultraviolet light reaching the photocatalyst structure 3 has the necessary light intensity, so that the photocatalyst structure 3 is in the best sterilization effect, and when judging the performance of the photocatalyst structure 3 , by adjusting the distance between the two to eliminate the interference factor of the ultraviolet light source 1.

In one type of embodiment, the distance control unit 5 includes a conveyor belt 51 that is communicatively connected to the control unit, one of the photocatalyst structure 3 and the ultraviolet light source 1 is fixed on the conveyor belt 51, and the other is located on the conveyor belt 51. on the side of the conveying direction of the conveying belt 51 . When the conveyor belt 51 is activated, the distance between the photocatalyst structure 3 and the ultraviolet light source 1 can be adjusted steplessly.

Preferably, the ultraviolet light source 1 is fixed on the conveyor belt 51 , the structure design is simple, and damage to the photocatalyst structure 3 is avoided during the moving process. Further, a power supply socket (not shown) is provided on the conveyor belt 51, and the ultraviolet light source 1 is electrically connected to the power supply socket, and the ultraviolet light source 1 is directly powered by the conveyor belt 51, avoiding the need for wires. Drawbacks.

Alternatively, the photocatalyst structure 3 is fixed on the conveyor belt 51, which can avoid wiring of wires, and the structure is simple.

In another type of embodiment, the distance control unit 5 includes an adjustment frame 52 and a plurality of card slots 53 arranged at intervals on the adjustment frame 52, and one of the photocatalyst structure 3 or the ultraviolet light source 1 has a The other one of the fasteners 54 fixed with the card slot 53 is located on the first side of the adjustment frame 52; the distance between the two can be adjusted by manual movement.

The distance regulating unit 5 further includes electromagnetic coils (not shown) disposed in the adjusting frame 52 and corresponding to the card slots 53 one-to-one; the fasteners 54 are magnetic parts. When the photocatalyst structure 3 or the ultraviolet light source 1 is fixed in one of the card slots 53, the electromagnetic coil corresponding to the card slot 53 is energized to generate a magnetic field to magnetically attract the magnetic member; it is necessary to move the photocatalyst structure 3 or When the ultraviolet light source 1 is turned off, the electromagnetic coil corresponding to the card slot 53 is powered off, the magnetic field disappears, and the card member 54 can move.

Further, the distance regulating unit 5 further includes a fixing frame 55 located on the second side of the adjusting frame 52 , and an elastic member 56 whose one end is fixed on the fixing frame 55 , and the other end of the elastic member 56 is connected to the fixing frame 55 . The photocatalyst structure 3 or the ultraviolet light source 1 is fixed or abutted, and the photocatalyst structure 3 or the ultraviolet light source 1 fixed on the adjusting frame 52 is located in the card slot farthest from the fixing frame 55 At 53, the spring is in a free or compressed state. In a specific embodiment, the elastic member 56 is a spring.

When the photocatalyst structure 3 or the ultraviolet light source 1 moves to a certain card slot 53, the electromagnetic coil corresponding to the card slot 53 is energized, and a magnetic field is generated to magnetically attract the magnetic member, and the card member 54 is under the magnetic attraction force. Under the action, it overcomes the elastic thrust of the spring and is fixed in the card slot 53; when the photocatalyst structure 3 or the ultraviolet light source 1 needs to be moved, the electromagnetic coil corresponding to the card slot 53 is powered off, and the magnetic field disappears. The clamping member 54 can move to the target slot 53 to be fixed by itself under the elastic thrust of the spring, and then energizes the electromagnetic coil corresponding to the target slot 53 .

Of course, the sterilization module 100 further includes a casing 6, and the above structures are all located in the casing 6, and the casing 6 has an air inlet 61 and an air outlet 62 to facilitate air circulation.

The present invention also provides a control method for the sterilization module 100, comprising the following steps:

Obtain the ultraviolet light intensity when the ultraviolet light source 1 is working,

Obtain the negative ion concentration that described photocatalyst structure 3 produces;

If the ultraviolet light intensity is lower than the first threshold value, the sterilization ability of the ultraviolet light emitted by the ultraviolet light source 1 will decrease, and the amount of negative ions generated by the photocatalyst structure 3 under the ultraviolet light intensity will also be affected; and/or negative ions When the concentration is lower than the second threshold, the amount of negative ions generated by the photocatalyst structure 3 under the current ultraviolet light intensity decreases, and its sterilization ability is insufficient; at this time, an alarm is issued to prompt the user to deal with it.

Among them, the acquisition time points of ultraviolet light intensity and negative ion concentration are: every time the sterilization module is started, at a fixed time period, such as every day; after the sterilization module runs for a period of time, such as every 10 hours, etc.

If the intensity of the ultraviolet light is lower than the first threshold and the concentration of negative ions is not lower than the second threshold, the ultraviolet light source 1 is abnormal, and 5 pieces of distance control units are activated to reduce the distance between the ultraviolet light source 1 and the photocatalyst structure 3 , to enhance the intensity of the ultraviolet light irradiated on the surface of the photocatalyst structure 3, until the ultraviolet light intensity is not lower than the first threshold, and the alarm is eliminated.

Further, if the distance between the ultraviolet light source 1 and the photocatalyst structure 3 is adjusted to the minimum distance, and the ultraviolet light intensity is still lower than the first threshold value, it means that the ultraviolet light source 1 can no longer be used, and then it is prompted to replace the ultraviolet light source. 1.

If the intensity of ultraviolet light is not lower than the first threshold, and the concentration of negative ions is lower than the second threshold, it means that the photocatalyst structure 3 is abnormal, adjust the fan M to the full-power air volume state, run it for a predetermined time, and blow away the photocatalyst structure with strong wind 3 Surface dust.

Further, the fan M works for a predetermined time under the state of full power and air volume. If the negative ion concentration is still lower than the second threshold, the photocatalyst structure 3 is prompted to be replaced or cleaned; if the negative ion concentration is not lower than the second threshold, the fan is reduced. M power to the normal sterilization state of the sterilization module 100 .

If the ultraviolet light intensity is lower than the first threshold value and the negative ion concentration is lower than the second threshold value, 5 pieces of distance control unit are activated to reduce the distance between the ultraviolet light source 1 and the photocatalyst structure 3 until the ultraviolet light intensity is not lower than the first threshold value. A threshold, continue to work for a predetermined time. In this method, the influence factors of the ultraviolet light source 1 are excluded first, and then the performance of the photocatalyst structure 3 is judged, which is more reasonable.

Further, if the distance between the ultraviolet light source 1 and the photocatalyst structure 3 is adjusted to the minimum distance, and the ultraviolet light intensity is still lower than the first threshold value, it means that the ultraviolet light source 1 can no longer be used, and then it is prompted to replace the ultraviolet light source. 1.

Further, the ultraviolet light intensity is not lower than the first threshold value, and after continuing to work for a predetermined time, if the negative ion concentration is still lower than the second threshold value, it means that the photocatalyst structure 3 is abnormal, and the fan M is adjusted to the full power air volume state, and the operation is scheduled to be performed. Over time, the dust on the surface of the photocatalyst structure 3 is blown away with a strong wind.

Further, the fan M works for a predetermined time under the state of full power and air volume. If the negative ion concentration is still lower than the second threshold, the photocatalyst structure 3 is prompted to be replaced or cleaned; if the negative ion concentration is not lower than the second threshold, the fan is reduced. M power to the normal sterilization state of the sterilization module 100 .

Further, if the intensity of ultraviolet light is not lower than the first threshold, and after continuing to work for a predetermined time, if the concentration of negative ions is not lower than the second threshold, it indicates that the sterilization module 100 is in a normal state.

To sum up, the sterilization module 100 of the present invention, on the one hand, directly sterilizes the ultraviolet light emitted by the ultraviolet light source 1, and at the same time, the photocatalyst structure 3 generates strong oxygen free radicals under the ultraviolet light to enhance the sterilization effect. On the other hand, the performance of the ultraviolet light source 1 is detected by the ultraviolet light intensity sensor 2, and the amount of negative ions generated by the photocatalyst structure 3 under the ultraviolet light source 1 is detected by the negative ion sensor 4, so that the working state of the sterilization module 100 can be fed back to the control unit in time. , to judge the performance of the ultraviolet light source 1 and the photocatalyst structure 3, and clean or replace them in time to avoid affecting the sterilization effect.

It should be understood that although this specification is described in terms of embodiments, not every embodiment only includes an independent technical solution, and this description in the specification is only for the sake of clarity, and those skilled in the art should take the specification as a whole, and each The technical solutions in the embodiments can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

The series of detailed descriptions listed above are only specific descriptions for the feasible embodiments of the present invention, and they are not used to limit the protection scope of the present invention. Changes should all be included within the protection scope of the present invention.

Claims (11)

1. A control method of a sterilization module is characterized by comprising the following steps:

acquiring the intensity of ultraviolet light when the ultraviolet light source works;

obtaining the concentration of negative ions generated by the photocatalyst structure;

and if the ultraviolet light intensity is lower than a first threshold value or the negative ion concentration is lower than a second threshold value, an alarm is given.

2. The method for controlling a sterilization module according to claim 1, wherein if the intensity of the ultraviolet light is lower than a first threshold and the concentration of the negative ions is not lower than a second threshold, the distance control unit is activated to decrease the distance between the ultraviolet light source and the photocatalyst structure until the intensity of the ultraviolet light is not lower than the first threshold.

3. The method as claimed in claim 2, wherein if the distance between the uv light source and the photocatalyst structure is adjusted to a minimum distance and the uv light intensity is still lower than a first threshold, then the uv light source is prompted to be replaced.

4. The method for controlling the sterilization module according to claim 1, wherein if the ultraviolet light intensity is not lower than the first threshold value and the negative ion concentration is lower than the second threshold value, the blower is adjusted to a full power air volume state.

5. The method as claimed in claim 4, wherein the fan is operated for a predetermined time in a full power air volume state, and if the concentration of negative ions is still lower than a second threshold value, the photocatalyst structure is prompted to be replaced or cleaned; and if the concentration of the negative ions is not lower than the second threshold value, reducing the power of the fan to the normal sterilization state of the sterilization module.

6. The method for controlling a sterilization module according to claim 1, wherein if the intensity of the ultraviolet light is lower than a first threshold and the concentration of the negative ions is lower than a second threshold, the distance control unit is activated to decrease the distance between the ultraviolet light source and the photocatalyst structure until the intensity of the ultraviolet light is not lower than the first threshold, and the operation is continued for a predetermined time.

7. The method as claimed in claim 6, wherein if the distance between the UV light source and the photocatalyst structure is adjusted to a minimum distance and the UV light intensity is still lower than a first threshold, then the UV light source is prompted to be replaced.

8. The method as claimed in claim 6, wherein the ultraviolet light intensity is not lower than the first threshold, and after the operation is continued for a predetermined time, if the negative ion concentration is still lower than the second threshold, the blower is adjusted to the full power air volume state.

9. The method of claim 8, wherein the fan is operated for a predetermined time in a full-power air volume state, and if the concentration of negative ions is still lower than a second threshold, the photocatalyst structure is prompted to be replaced or cleaned; and if the concentration of the negative ions is not lower than the second threshold value, reducing the power of the fan to a normal sterilization state of the sterilization module.

10. The method as claimed in claim 6, wherein the intensity of the ultraviolet light is not lower than a first threshold, and after the operation is continued for a predetermined time, if the concentration of the negative ions is not lower than a second threshold, the sterilization module is indicated to be in a normal state.

11. An electric home appliance comprising the method for controlling the sterilization module according to any one of claims 1 to 10.

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