Dust removal device, refrigerator and refrigerator dust removal control method

Abstract

The invention discloses a dust removal device, a refrigerator and a refrigerator dust removal control method. According to the dust removal device, the ion generator is arranged in the refrigerator, the ion generator releases negative ions into the cavity needing dust removal, dust in the refrigerator carries negative charges, the grounded metal piece is further arranged in the refrigerator, the metal piece can adsorb the dust with the negative charges, and when the dust in the refrigerator is swept, the dust in the refrigerator can be removed through the metal piece. Only the metal piece needs to be cleaned, and operation is convenient and fast. The invention further provides a refrigerator dust removal control method, the negative ion concentration in the refrigerator is monitored in real time, the power of the ion generator is dynamically adjusted according to the change of the negative ion concentration, and it is ensured that the dust removal effect is always kept in the optimal state.

Description

Technical Field

[0001] The present invention relates to the field of refrigerators, and in particular to a dust removal device, a refrigerator and a refrigerator dust removal control method. Background Art

[0002] In the fast-paced life of modern society, refrigerators are indispensable electrical appliances in family life. Their main function is to preserve and store food, which plays a vital role in ensuring the food safety and convenience of family members. However, with the accumulation of daily use time, the internal environment of the refrigerator gradually deteriorates and becomes a gathering place for dust, bacteria and other pollutants. These pollutants not only directly threaten the quality and safety of food stored in the refrigerator, but may also affect human health through the food chain. In addition, the dust accumulated inside the refrigerator will also adhere to the refrigeration system, affecting its heat dissipation effect, thereby reducing the refrigerator's refrigeration efficiency and energy utilization, and increasing household energy consumption.

[0003] Most refrigerators currently on the market do not fully consider the cleaning and maintenance needs of the internal environment in their designs, and lack an effective automatic dust removal system. Users generally rely on regular manual cleaning to reduce dust accumulation, which is not only cumbersome, time-consuming and labor-intensive, but also difficult to completely remove fine dust and bacteria inside the refrigerator. Especially when the refrigerator door is frequently opened and closed, external dust and microorganisms can easily take the opportunity to invade, further exacerbating the deterioration of the internal environment of the refrigerator. At the same time, changes in temperature and humidity in different seasons will also affect the adsorption capacity of dust and the growth rate of bacteria, making it difficult for traditional manual cleaning methods to respond to these dynamically changing environmental factors in real time.

[0004] As consumers pay more and more attention to the quality of life and health standards, the requirements for the cleanliness and air quality of the refrigerator's internal environment are also constantly increasing. Consumers increasingly expect to have a refrigerator product that can automatically and efficiently remove dust and pollutants inside the refrigerator while maintaining good air quality. However, the refrigerator products currently on the market still have obvious shortcomings in this regard and cannot meet consumers' high standards for the cleanliness and air quality of the refrigerator's internal environment.

[0005] Therefore, in view of the above background, it is particularly important to develop a refrigerator internal dust removal system that integrates advanced dust removal technology. Summary of the invention

[0006] In order to solve the technical problem of complicated dust cleaning inside a refrigerator in the prior art, the present invention provides a dust removal device, a refrigerator and a refrigerator dust removal control method.

[0007] The technical solution adopted by the present invention is:

[0008] The present invention provides a dust removal device, comprising:

[0009] An ion generator is arranged in the dust removal chamber, and releases negative ions into the dust removal chamber, so that the dust in the refrigeration chamber has a negative charge;

[0010] The metal piece is grounded and arranged in the dust removal chamber to absorb dust with negative charge.

[0011] Furthermore, a grounding contact is provided in the dust removal chamber, and the metal part is in contact with the grounding contact.

[0012] Furthermore, a dust sensor is provided in the chamber to be dust-removed for detecting the amount of dust in the chamber to be dust-removed.

[0013] A refrigerator comprises the dust removal device described in any one of the above, wherein the dust removal device is arranged in a refrigerating chamber of the refrigerator.

[0014] Furthermore, the metal member surrounds the shelf of the refrigerator.

[0015] A refrigerator dust removal control method, when the refrigerator dust removal control method is executed, using the refrigerator, comprising the steps of:

[0016] Calculate the current negative ion concentration C based on the refrigerator door opening time and the amount of dust;

[0017] The adjustment factor F is calculated according to the current negative ion concentration C, and the power P of the ion generator is adjusted according to the size of the adjustment factor F, so that the current negative ion concentration C returns to the target negative ion concentration range.

[0018] Furthermore, the refrigerator recalculates the current negative ion concentration C every first time period.

[0019] Furthermore, the calculation method of the negative ion concentration C is: C=k*C0*(1+α*t*D / C0), C0 is the initial negative ion concentration, α is the gain coefficient of negative ions in the current first time period, T is the length of time the refrigerator door is opened in the current first time period, D is the amount of dust per unit volume of the refrigerator in the current first time period, and K is the proportional constant.

[0020] Furthermore, the calculation method of the adjustment factor F is: F=(Ctarget-C) / Ctarget, Ctarget is the middle value of the target negative ion concentration range, if the current negative ion concentration C≥Ctarget, then F=0.

[0021] Furthermore, the power P of the ion generator is adjusted according to the adjustment factor F, comprising the steps of:

[0022] Preset a plurality of adjustment factor ranges whose corresponding range values ​​decrease in sequence, and set a plurality of adjustment powers Ppreset corresponding to the plurality of adjustment factor ranges;

[0023] Get the adjustment factor range where the adjustment factor F is located, and the adjustment power Ppre of the ion generator corresponding to the adjustment factor range. The adjusted power P is equal to the current power P plus the adjustment power Ppre. The smaller the range value of the preset range corresponding to the adjustment factor F, the smaller the corresponding adjustment power Ppre.

[0024] Compared with the prior art, the present invention proposes a dust removal device, in which an ion generator is arranged in the refrigerator, and the ion generator releases negative ions into the dust chamber to be removed, so that the dust in the refrigerator has a negative charge. A grounded metal part is also arranged in the refrigerator, and the metal part can absorb the dust with negative charge. When cleaning the dust in the refrigerator, only the metal part needs to be cleaned, and the operation is convenient and fast. The present invention also proposes a refrigerator dust removal control method, which monitors the negative ion concentration inside the refrigerator in real time, and dynamically adjusts the power of the ion generator according to the change of the negative ion concentration, so as to ensure that the dust removal effect is always kept in the best state. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0026] Figure 1 It is a schematic diagram of the three-dimensional structure of an embodiment of the present invention;

[0027] Figure 2 It is a schematic diagram of the process of an embodiment of the present invention;

[0028] Figure 3 This is a flow chart for calculating the negative ion concentration C according to an embodiment of the present invention;

[0029] Figure 4 This is a flow chart of calculating the adjustment factor F according to an embodiment of the present invention;

[0030] Figure 5 This is a power P regulation flow chart of an embodiment of the present invention;

[0031] 1. Door switch detector;

[0032] 2. Ion generator;

[0033] 3. Ground contact;

[0034] 4. Dust sensor;

[0035] 5. Metal parts;

[0036] 6. Shelves. DETAILED DESCRIPTION

[0037] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0038] The principle and structure of the present invention are described in detail below with reference to the accompanying drawings and embodiments.

[0039] In the fast-paced life of modern society, refrigerators are indispensable electrical appliances in family life. Their main function is to preserve and store food, which plays a vital role in ensuring the food safety and convenience of family members. However, with the accumulation of daily use time, the internal environment of the refrigerator gradually deteriorates and becomes a gathering place for dust, bacteria and other pollutants. These pollutants not only directly threaten the quality and safety of food stored in the refrigerator, but may also affect human health through the food chain. In addition, the dust accumulated inside the refrigerator will also adhere to the refrigeration system, affecting its heat dissipation effect, thereby reducing the refrigerator's refrigeration efficiency and energy utilization, and increasing household energy consumption.

[0040] Most refrigerators currently on the market do not fully consider the cleaning and maintenance needs of the internal environment in their designs, and lack an effective automatic dust removal system. Users generally rely on regular manual cleaning to reduce dust accumulation, which is not only cumbersome, time-consuming and labor-intensive, but also difficult to completely remove fine dust and bacteria inside the refrigerator. Especially when the refrigerator door is frequently opened and closed, external dust and microorganisms can easily take the opportunity to invade, further exacerbating the deterioration of the internal environment of the refrigerator. At the same time, changes in temperature and humidity in different seasons will also affect the adsorption capacity of dust and the growth rate of bacteria, making it difficult for traditional manual cleaning methods to respond to these dynamically changing environmental factors in real time.

[0041] As consumers pay more and more attention to the quality of life and health standards, the requirements for the cleanliness and air quality of the refrigerator's internal environment are also constantly increasing. Consumers increasingly expect to have a refrigerator product that can automatically and efficiently remove dust and pollutants inside the refrigerator while maintaining good air quality. However, the refrigerator products currently on the market still have obvious shortcomings in this regard and cannot meet consumers' high standards for the cleanliness and air quality of the refrigerator's internal environment.

[0042] Therefore, in view of the above background, it is particularly important to develop a refrigerator internal dust removal system that integrates advanced dust removal technology.

[0043] like Figure 1 As shown, the present invention proposes a dust removal device, including: an ion generator 2 and a metal part 5.

[0044] The ion generator 2 is arranged in the dust removal chamber. The ion generator 2 is an existing device. The ion generator 2 releases negative ions into the dust removal chamber, so that the dust in the refrigeration chamber has a negative charge. The ion generator is arranged at the top of the dust removal chamber to ensure that negative ions can be uniformly released into the dust removal chamber. These negative ions will interact with dust particles in the air. Dust particles are usually positively charged or electrically neutral. Under the action of negative ions, they will be given a negative charge.

[0045] The metal part 5 is grounded. The metal part 5 is arranged in the dust removal chamber. Since the dust carries a negative charge, a current difference is generated between the metal part 5 and the dust carrying the negative charge, so that the dust carrying the negative charge is adsorbed on the metal part 5. The shape of the metal part 5 is not limited, and it can be a metal frame or a metal plate. The metal part 5 is usually made of a material with good electrical conductivity, such as stainless steel or aluminum alloy. The metal frame is connected to the metal grounding contact 3 to ensure that it can be safely grounded or connected to the refrigerator shell. Thereby, it is ensured that the dust particles carrying the negative charge are gradually deposited on the metal part 5 under the action of the electrostatic force, so as to achieve the adsorption of dust.

[0046] The dust removal device can automatically adapt to environmental changes during the use of the dust removal chamber and effectively remove dust inside the refrigerator in real time.

[0047] The ion generator 2 continuously releases negative ions, and can automatically adapt to environmental changes during the use of the refrigerator without human intervention. This automatic adaptability ensures the continuity and stability of the dust removal effect. The interaction between negative ions and dust particles causes the dust particles to be given negative charges, which are then adsorbed to the grounded metal part 5 under the action of electrostatic force. This electrostatic adsorption method is not only highly efficient, but also can cover every corner inside the refrigerator, ensuring comprehensive removal of dust.

[0048] There is no restriction on the shape of the metal part 5, and it can be flexibly adjusted according to the layout inside the dust removal chamber, which improves the applicability and flexibility of the device. The grounding design of the metal part 5 ensures the safety of the entire dust removal process. Even if there is static electricity accumulation inside the dust removal chamber, it can be released in time through grounding, avoiding the harm that may be caused by static electricity discharge. Since the dust is concentrated on the metal part 5, it is only necessary to clean the metal part 5 regularly during cleaning, and there is no need to perform tedious cleaning work on the entire dust removal chamber. This greatly reduces maintenance costs and time costs. The dust removal device does not need to consume a lot of energy, the operating power of the ion generator 2 is low, and the entire dust removal process does not produce any harmful substances or noise pollution, which meets the environmental protection and energy-saving requirements of modern household appliances.

[0049] In a further embodiment, a grounding contact 3 is provided in the dust removal chamber, and the metal member 5 is in contact with the grounding contact 3. Even if static electricity is accumulated inside the dust removal chamber, it can be released in time through grounding, thus avoiding the harm caused by static electricity discharge.

[0050] In a further embodiment, a dust sensor 4 is provided in the dust removal chamber for detecting the amount of dust in the dust removal chamber, and the power of the ion generator 2 or the switch of the ion generator 2 is selected according to the vertical value detected by the dust sensor 4. The urgency of the dust removal demand can be accurately judged by detecting the dust concentration in the chamber in real time by the dust sensor 4. When the dust concentration is high, the power of the ion generator 2 is automatically increased to enhance the dust removal effect; otherwise, the power is reduced or the ion generator 2 is turned off in time to avoid unnecessary energy consumption. This intelligent adjustment mechanism ensures the dual optimization of dust removal efficiency and energy efficiency.

[0051] In a further embodiment, a door switch detector 1 is provided in the chamber to be dust-removed. The door switch detector 1 can detect the door opening time of the chamber to be dust-removed, and the power of the ion generator 2 is selected according to the door opening time.

[0052] The door switch detector 1 can accurately grasp the door opening and closing time, and automatically adjust the power of the ion generator 2 according to the door opening time to cope with the possible increase in dust entering. This intelligent response mechanism not only ensures the dust removal effect, but also avoids unnecessary energy consumption and achieves the goal of energy conservation and emission reduction. The extension of the door opening time usually causes more dust to enter the refrigerator. Based on the data of the door switch detector 1, the system can more accurately judge the dust removal needs and optimize the dust removal strategy. For example, after the door is opened for a long time, the system can automatically increase the power of the ion generator 2 to quickly remove the newly entered dust.

[0053] like Figure 1 As shown, the present invention further provides a refrigerator, comprising the dust removal device of the present invention, which is arranged in the refrigerator compartment. The metal member 5 is annularly surrounded by the shelf 6 of the refrigerator. A grounding contact point is arranged in the refrigerator compartment, and the grounding contact point has good conductivity and elasticity to ensure close contact with the metal member 5 around the shelf 6. The number and position of the metal member 5 can be reasonably arranged according to the size and shape of the metal member 5 to ensure the grounding effect.

[0054] like Figure 2-5 As shown, the present invention also proposes a refrigerator dust removal control method. When the refrigerator dust removal control method is executed, the refrigerator of the present invention is used.

[0055] The refrigerator dust removal control method comprises the steps of:

[0056] Calculate the current negative ion concentration C based on the refrigerator door opening time and the amount of dust;

[0057] The adjustment factor F is calculated according to the current negative ion concentration C, and the power P of the ion generator is adjusted according to the size of the adjustment factor F, so that the current negative ion concentration C returns to the target negative ion concentration range.

[0058] By real-time monitoring of the negative ion concentration inside the refrigerator, the method can accurately reflect the air quality and dust removal requirements inside the refrigerator. According to the change of negative ion concentration, the power of the ion generator 2 is dynamically adjusted to ensure that the dust removal effect is always maintained at the best state. The problem of excessive dust removal or insufficient dust removal that may exist in traditional dust removal methods is avoided, and the dust removal efficiency is improved. By intelligently adjusting the power of the ion generator 2, the method can reasonably allocate energy according to actual needs and avoid unnecessary energy consumption.

[0059] In a further embodiment, the refrigerator recalculates the current negative ion concentration C every first time period, so that the power of the ion generator can be adjusted accordingly according to the change in each time period, ensuring that the dust removal effect is always maintained in the best state.

[0060] In a further embodiment, the calculation method of the negative ion concentration C is: C = k*C0*(1+α*t*D / C0), C0 is the initial negative ion concentration in the current first time period, α is the gain coefficient of negative ions in the current first time period, T is the length of time the refrigerator door is opened in the current first time period, D is the amount of dust per unit volume in the current first time period, and K is the proportional constant.

[0061] This formula not only takes into account the initial negative ion concentration C0, but also introduces multiple variables such as the negative ion gain coefficient α, the refrigerator door opening time t, and the amount of dust per unit volume D, so as to more comprehensively reflect the changes in the negative ion concentration inside the refrigerator. The air quality inside the refrigerator can be more accurately evaluated, and the power of the ion generator 2 can be adjusted accordingly to achieve the best dust removal effect. The proportional constant K in the formula can be calibrated according to actual conditions to ensure the accuracy of the calculation. By introducing the gain coefficient α, the changing trend of negative ions inside the refrigerator can be reflected, making the calculation result more in line with the actual situation.

[0062] In a further embodiment, the power P of the ion generator 2 is adjusted according to the adjustment factor F, and the calculation steps of the adjustment factor F are: F = (Ctarget-C) / Ctarget, Ctarget is the middle value of the target negative ion concentration range, if the current negative ion concentration C≥Ctarget, then F=0.

[0063] The introduction of the adjustment factor F makes the power adjustment of the ion generator 2 more precise. The calculation formula of F is directly related to the intermediate value Ctarget of the current negative ion concentration C and the target negative ion concentration range, and can reflect the gap between the current concentration and the target concentration in real time. By accurately calculating the value of F, the fine-tuning of the power of the ion generator 2 can be realized, ensuring that the negative ion concentration always remains within the target range, neither too high nor too low. This adjustment strategy has the characteristics of dynamic response. When the internal environment of the refrigerator changes, such as the negative ion concentration drops due to opening the door, the system can quickly calculate the new F value and adjust the power of the ion generator 2 accordingly. This dynamic response mechanism ensures the stability of the negative ion concentration inside the refrigerator and can maintain a good dust removal effect even under adverse conditions such as frequent door opening.

[0064] Adjust the power P of the ion generator 2 according to the adjustment factor F, including the steps of: presetting multiple adjustment factor ranges with sequentially decreasing range values, and setting multiple adjustment powers Ppre corresponding to the multiple adjustment factor ranges;

[0065] Obtain the adjustment factor range where the adjustment factor F is located, and the adjustment power P of the ion generator corresponding to this adjustment factor range 预 , the adjusted power P is equal to the current power P plus the adjustment power P 预 , and the smaller the range value of the preset range corresponding to the adjustment factor F, the corresponding adjustment power P 预 is smaller.

[0066] If F > 0.2, P = P + P 预， P 预 = 0.5P;

[0067] When 0.1 < F ≤ 0.2, P = P + P 预， P 预 = 0.2P;

[0068] When 0.05 < F ≤ 0.1, P = P + P 预， P 预 = 0.1P;

[0069] When -0.05 ≤ F ≤ 0.05, P = P + P 预， P 预 = 0;

[0070] When -0.1 < F ≤ -0.05, P = P + P 预， P 预 = -0.1P;

[0071] When -0.2 < F ≤ -0.1, P = P + P 预， P 预 = -0.2P;

[0072] When F≤-0.2, P=P+P 预， P 预 =-0.5P.

[0073] By setting multiple F value intervals and corresponding power adjustment rules, this strategy can achieve precise adjustment of the power of ion generator 2. This accuracy helps to ensure that the negative ion concentration always remains within the target range and improves the dust removal effect. At the same time, this strategy also has a certain degree of flexibility. When the gap between the negative ion concentration and the target value is large, the system can quickly increase the power of ion generator 2 to quickly reach the target concentration; when the gap is small, fine-tuning is performed to maintain stability.

[0074] Compared with the prior art, the present invention proposes a dust removal device, wherein an ion generator 2 is arranged in the refrigerator, and the ion generator 2 releases negative ions into the dust removal chamber to make the dust in the refrigerator negatively charged. A grounded metal part 5 is also arranged in the refrigerator, and the metal part 5 can absorb the dust with negative charge. When cleaning the dust in the refrigerator, only the metal part 5 needs to be cleaned, and the operation is convenient and fast. The present invention also proposes a refrigerator dust removal control method, which monitors the negative ion concentration inside the refrigerator in real time, and dynamically adjusts the power of the ion generator 2 according to the change of the negative ion concentration, so as to ensure that the dust removal effect is always kept in the best state.

[0075] It should be noted that the terms used above are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0076] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0077] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0078] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0079] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0080] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A dust removal device, characterized in that: include: An ion generator is arranged in the dust removal chamber, and releases negative ions into the dust removal chamber, so that the dust in the refrigeration chamber has a negative charge; The metal piece is grounded and arranged in the dust removal chamber to absorb dust with negative charge.

2. The dust removal device according to claim 1, characterized in that: A grounding contact is arranged in the dust removal chamber, and the metal piece contacts the grounding contact.

3. The dust removal device according to claim 1, characterized in that: A dust sensor is arranged in the chamber to be dust-removed for detecting the amount of dust in the chamber to be dust-removed.

4. A refrigerator, characterized in that: It comprises the dust removal device as described in any one of claims 1 to 3, and the dust removal device is arranged in the refrigerating chamber of the refrigerator.

5. The refrigerator according to claim 4, characterized in that: The metal member surrounds the shelves of the refrigerator.

6. A refrigerator dust removal control method, characterized in that: Using the refrigerator according to any one of claims 4-5 comprises the steps of: Calculate the current negative ion concentration C based on the refrigerator door opening time and the amount of dust; The adjustment factor F is calculated according to the current negative ion concentration C, and the power P of the ion generator is adjusted according to the size of the adjustment factor F, so that the current negative ion concentration C returns to the target negative ion concentration range.

7. The refrigerator dust removal control method according to claim 6, characterized in that: The refrigerator recalculates the current negative ion concentration C every first time period.

8. The refrigerator dust removal control method according to claim 7, characterized in that: The calculation method of the negative ion concentration C is: C=k*C0*(1+α*t*D / C0), C0 is the initial negative ion concentration, α is the gain coefficient of negative ions in the current first time period, T is the length of time the refrigerator door is opened in the current first time period, D is the amount of dust per unit volume of the refrigerator in the current first time period, and K is the proportional constant.

9. The refrigerator dust removal control method according to claim 6, characterized in that: The calculation method of the adjustment factor F is: F=(Ctarget-C) / Ctarget, Ctarget is the middle value of the target negative ion concentration range, and if the current negative ion concentration C≥Ctarget, F=0.

10. The refrigerator dust removal control method according to claim 7, characterized in that: The method of adjusting the power P of the ion generator according to the adjustment factor F comprises the following steps: Preset a plurality of adjustment factor ranges whose corresponding range values ​​decrease in sequence, and set a plurality of adjustment powers Ppreset corresponding to the plurality of adjustment factor ranges; Get the adjustment factor range where the adjustment factor F is located, and the adjustment power Ppre of the ion generator corresponding to the adjustment factor range. The adjusted power P is equal to the current power P plus the adjustment power Ppre. The smaller the range value of the preset range corresponding to the adjustment factor F, the smaller the corresponding adjustment power Ppre.

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