Air treatment equipment and air purification device

Abstract

The invention relates to air treatment equipment and an air purification device. The air purification device comprises a first electrode and a second electrode, the second electrode and the first electrode are arranged at an interval; the insulating part is at least partially arranged between the first electrode and the second electrode so as to separate the first electrode from the second electrode; the power supply is electrically connected to the first electrode and the second electrode; wherein the power supply is configured to alternately apply high voltage to the first electrode and the second electrode, and when the high voltage is applied to one of the first electrode and the second electrode, the other one of the first electrode and the second electrode is grounded, so that the first electrode and the second electrode generate dielectric barrier discharge. The technical problem to be solved by the invention is how to prolong the service life of an electrode.

Description

Technical Field

[0001] The present invention relates to the field of electrical equipment technology, and in particular to an air treatment device and an air purification device. Background Art

[0002] Some existing air conditioners are equipped with air purification devices. The air purification device usually includes a ground electrode, a high voltage electrode, a high voltage package and a glass tube. The high voltage electrode is respectively arranged on the outside of the glass tube, and the ground electrode is arranged on the inside of the glass tube. The ground electrode is connected to the reference ground, and then the high voltage package is loaded with an AC voltage on the high voltage electrode to achieve dielectric barrier discharge. When the air purification device performs dielectric barrier discharge, some active substances that can kill bacteria are generated.

[0003] However, the discharge area of ​​this air purifier is small, and the sterilization and deodorization effects are poor. At the same time, the high voltage pole is discharged for a long time, and the high voltage pole will be in a high temperature state for a long time. The material of the high voltage pole is easy to age, which leads to a decrease in the active substances produced by the air purifier and a further decrease in the sterilization and deodorization effects.

[0004] However, if the sterilization and deodorization effects are improved by simply increasing the discharge voltage of the high-voltage package, the manufacturing cost of the high-voltage package will directly increase. At the same time, the increase in voltage on the high-voltage pole will also lead to an increase in by-products such as ozone, which can easily cause ozone to exceed the standard and reduce user experience. Summary of the invention

[0005] The technical problem to be solved by this application is how to prolong the service life of the electrode.

[0006] The present application provides an air purification device, which comprises:

[0007] a first electrode;

[0008] a second electrode, spaced apart from the first electrode;

[0009] an insulating member, at least partially disposed between the first electrode and the second electrode to separate the first electrode from the second electrode;

[0010] a power source electrically connected to the first electrode and the second electrode;

[0011] The power supply is configured to alternately apply high voltage to the first electrode and the second electrode, and when one of the first electrode and the second electrode is applied with a high voltage, the other of the first electrode and the second electrode is grounded, so that dielectric barrier discharge occurs between the first electrode and the second electrode.

[0012] In an exemplary embodiment, the high voltage applied by the power supply to one of the first electrode and the second electrode is a positive voltage, and the high voltage applied by the power supply to the other of the first electrode and the second electrode is a negative voltage.

[0013] In an illustrative embodiment, the high voltages applied by the power supply to the first electrode and the second electrode are both positive voltages or both negative voltages.

[0014] In an exemplary embodiment, the alternating frequency at which the power source alternately applies the high voltage to the first electrode and the second electrode is negatively correlated with the peak value of the high voltage.

[0015] In an exemplary embodiment, the power source alternately applies a high voltage to the first electrode and the second electrode at an alternating frequency of 1 to 20 Hz; and / or

[0016] The peak voltage of the high voltage is 3.6 kV to 5 kV.

[0017] In an illustrative embodiment, the insulating member is configured in a cylindrical shape, the first electrode is disposed inside the insulating member, and the second electrode is disposed outside the insulating member.

[0018] In an exemplary embodiment, the first electrode is configured as a straight strip structure coaxial with the insulating member;

[0019] The second electrode is configured in a solenoid shape or a cylindrical shape coaxial with the first electrode.

[0020] In an exemplary embodiment, the insulating member has a uniform thickness.

[0021] In an illustrative embodiment, the second electrode is mounted on the outer peripheral wall of the insulating member.

[0022] The present application also proposes an air treatment device, which includes the air purification device as described above.

[0023] When a high voltage is applied to the first electrode, the first electrode discharges, and when a high voltage is applied to the second electrode, the second electrode discharges. Since the power supply applies a high voltage to the first electrode and the second electrode alternately, the first electrode and the second electrode discharge alternately, the temperature on the first electrode and the second electrode is lower, and the service life of the first electrode and the second electrode is longer; at the same time, a discharge area is formed near the first electrode, and a discharge area is also formed near the second electrode, which increases the total area of ​​the discharge area, thereby producing more active substances and improving the sterilization and deodorization effects.

[0024] Other features and advantages of the present application will be described in the following description, and partly become apparent from the description, or be understood by implementing the present application. Other advantages of the present application can be realized and obtained by the schemes described in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings are used to provide an understanding of the technical solution of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solution of the present application and do not constitute a limitation on the technical solution of the present application.

[0026] Figure 1 is a three-dimensional schematic diagram of an air purification device in an embodiment of the present application;

[0027] Figure 2 is a cross-sectional schematic diagram of an air purification device in an embodiment of the present application;

[0028] Figure 3 Schematic diagram of waveforms of voltages applied to the first electrode and the second electrode in the embodiment of the present application. DETAILED DESCRIPTION

[0029] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0030] This embodiment proposes an air treatment device, which can take in and out air, and has unlimited air treatment functions, for example, it can perform at least one of the following treatment functions: temperature adjustment, humidification, purification, circulation, etc. The air treatment device includes but is not limited to an air conditioner, and the air treatment device can also be a purifier, a humidifier, a fan, etc. After the specific type of the air treatment device is determined, those skilled in the art can know the composition of the air treatment device to realize the air treatment function, which will not be described in detail here.

[0031] The air treatment equipment includes a housing, a fan and an air purification device 100. The housing is provided with an air inlet, an air outlet and an air duct. The two ends of the air duct are respectively connected to the air inlet and the air outlet. The fan is arranged in the air duct. The fan can be a cross-flow fan or a centrifugal fan. After the fan is started, it can drive the air in the air duct to move from the air inlet to the air outlet, so that the air inlet sucks the air in the surrounding environment into the air duct, and the air is discharged from the air outlet to the surrounding environment after flowing through the air duct. The air purification device 100 is arranged at the air inlet, in the air duct or at the air outlet. The air outlet can be openable and closable, for example, a movable damper or air guide plate can be arranged at the air outlet to open or close the air outlet.

[0032] like Figure 1 , 2 As shown, Figure 1 ,2 The structure of an air purification device 100 in this embodiment is shown. The air purification device 100 includes a first electrode 1 , a second electrode 3 , an insulating member 2 and a power source 4 .

[0033] The first electrode 1 is a conductor. The first electrode 1 can be made of metal or carbon fiber, such as copper, aluminum, iron and alloys thereof. The shape of the first electrode 1 is not limited, and can be cylindrical, annular, strip, sheet, block or plate.

[0034] The second electrode 3 is a conductor. The second electrode 3 can be made of metal or carbon fiber, such as copper, aluminum, iron and alloys thereof. The shape of the second electrode 3 is not limited, and can be cylindrical, annular, strip, sheet, block or plate. A gap is set between the first electrode 1 and the second electrode 3.

[0035] The insulating member 2 is made of insulating material and has a very high resistivity. The insulating member 2 can be made of a polymer insulating material such as vinyl chloride, polyethylene, silicone, rubber, etc., or it can be made of an inorganic non-metallic material such as quartz glass, ceramic, apatite, mica, etc. The insulating member 2 is at least partially arranged in the gap between the first electrode 1 and the second electrode 3 to separate the first electrode 1 and the second electrode 3. The shape of the insulating member is not limited, and it can be constructed in a plate-like, cylindrical, coated or block-like shape. The insulating member 2 can be a surface covering the first electrode 1 close to the second electrode 3, and a gap is formed between the second electrode 3. The insulating member 2 can also be a surface covering the second electrode 3 close to the first electrode 1, and a gap is formed between the first electrode 1. The insulating member 2 can also be located between the first electrode 1 and the second electrode 3 and spaced from the first electrode 1 and the second electrode 3 respectively.

[0036] The power supply 4 includes a first output port and a second output port. The first output port and the second output port are electrically connected to the first electrode 1 and the second electrode 3, respectively. The first output port can be electrically connected to the first electrode 1 through a wire. The second output port can be electrically connected to the second electrode 3 through a wire. Figure 3 As shown, the power supply 4 is configured to alternately apply a high voltage to the first electrode 1 and the second electrode 3, and ground the other of the first electrode 1 and the second electrode 3 when the high voltage is applied to one of the first electrode 1 and the second electrode 3. The potential of the grounded electrode is zero. The high voltage output by the power supply 4 is less than the breakdown voltage of the insulating member 2. The peak voltage of the high voltage can be 1 kV to 8 kV. The peak value of the high voltage applied by the power supply 4 to the first electrode 1 and the peak value of the high voltage applied by the power supply 4 to the second electrode 3 can be the same or different.

[0037] In this way, the power supply 4 applies a high voltage to the first electrode 1 while grounding the second electrode 3, there is a voltage difference between the first electrode 1 and the second voltage, and an electric field is formed between the first electrode 1 and the second electrode 3, which can ionize the air so that dielectric barrier discharge occurs between the first electrode 1 and the second electrode 3. The power supply 4 applies a high voltage to the second electrode 3 while grounding the first electrode 1, there is a voltage difference between the first electrode 1 and the second voltage, and an electric field is formed between the first electrode 1 and the second electrode 3, which can also ionize the air so that dielectric barrier discharge occurs between the first electrode 1 and the second electrode 3. Dielectric barrier discharge can generate active substances such as positive and negative ions, plasma, and hydroxyl free radicals in the air. These charged particles can kill microorganisms such as bacteria in the air, and can also decompose odor molecules to remove odors.

[0038] At the same time, when a high voltage is applied to the first electrode 1, the first electrode 1 discharges, and when a high voltage is applied to the second electrode 3, the second electrode 3 discharges. Since the power supply 4 applies a high voltage to the first electrode 1 and the second electrode 3 alternately, the first electrode 1 and the second electrode 3 discharge alternately, the temperature on the first electrode 1 and the second electrode 3 is lower, and the service life of the first electrode 1 and the second electrode 3 is longer; at the same time, a discharge area is formed near the first electrode 1, and a discharge area is also formed near the second electrode 3, which increases the total area of ​​the discharge area, thereby producing more active substances and improving the sterilization and deodorization effects.

[0039] In an illustrative embodiment, the high voltage applied by the power supply 4 to one of the first electrode 1 and the second electrode 3 is a positive voltage, and the high voltage applied by the power supply 4 to the other of the first electrode 1 and the second electrode 3 is a negative voltage. A positive voltage is a voltage having a potential greater than a zero potential, and a negative voltage is a voltage having a potential less than a zero potential. That is, when the high voltage applied by the power supply 4 to the first electrode 1 is a positive voltage, the high voltage applied by the power supply 4 to the second electrode 3 is a negative voltage, and when the high voltage applied by the power supply 4 to the second electrode 3 is a positive voltage, the high voltage applied by the power supply 4 to the first electrode 1 is a negative voltage.

[0040] In an illustrative embodiment, the first output port of the power supply 4 is used to output a voltage with periodic positive and negative changes, and the second output port is used to provide a ground voltage. The first output port and the second output port can be switched to be connected to the first electrode 1 and the second electrode 3. By switching the connection mode between the first output port, the second output port and the first electrode 1 and the second electrode 3 when the voltage outputted by the first output port of the power supply 4 changes in positive and negative, the power supply 4 can alternately apply high voltages with opposite positive and negative to the first electrode 1 and the second electrode 3, and when one of the first electrode 1 and the second electrode 3 is applied with a high voltage, the other of the first electrode 1 and the second electrode 3 is grounded. The voltage with periodic positive and negative changes can be a sine waveform or a pulse waveform.

[0041] For example, when the first output port outputs a positive voltage, the first output port and the first electrode 1 are electrically connected, and the second output port and the second electrode 3 are electrically connected; when the first output port outputs a negative voltage, the first output port and the second electrode 3 are electrically connected, and the second output port and the first electrode 1 are electrically connected.

[0042] When the power source 4 applies high voltages of different polarities to the first electrode 1 and the second electrode 3 , both the first electrode 1 and the second electrode 3 can perform dielectric barrier discharge.

[0043] In an illustrative embodiment, the high voltages applied by the power source 4 to the first electrode 1 and the second electrode 3 are both positive voltages, or the high voltages applied by the power source 4 to the first electrode 1 and the second electrode 3 are both negative voltages.

[0044] When the power source 4 applies a high voltage with the same polarity to the first electrode 1 and the second electrode 3 , both the first electrode 1 and the second electrode 3 can perform dielectric barrier discharge.

[0045] In an illustrative embodiment, the alternating frequency at which the power source 4 alternately applies a high voltage to the first electrode 1 and the second electrode 3 is negatively correlated with the high voltage applied to the first electrode 1 by the power source 4. The alternating frequency at which the power source 4 alternately applies a high voltage to the first electrode 1 and the second electrode 3 is negatively correlated with the high voltage applied to the second electrode 3 by the power source 4.

[0046] The higher the frequency of alternating discharge between the first electrode 1 and the second electrode 3, the more times the air is ionized per unit time, the more active substances are produced, and the better the sterilization and deodorization effects. Therefore, the voltage peak of the high voltage can be appropriately reduced to reduce the concentration of ozone.

[0047] In an illustrative embodiment, the alternating frequency of the high voltage applied by the power supply 4 to the first electrode 1 and the second electrode 3 alternately ranges from 1 to 20 Hz. The peak value of the high voltage applied by the power supply 4 to the first electrode 1 ranges from 3.6 kV to 5 kV. The peak value of the high voltage applied by the power supply 4 to the second electrode 3 ranges from 3.6 kV to 5 kV.

[0048] In this way, the sterilization rate of the air purification device 100 is relatively high, reaching at least 97% or more, the service life of the first electrode 1 and the second electrode 3 is relatively long, reaching more than 1000 hours, and the concentration of the generated ozone is relatively low.

[0049] This application also proposes a set of comparative experiments:

[0050] Experiment 1

[0051] An existing air purification device 100 includes a first electrode 1, a second electrode 3, a power supply 4, and an insulating member 2 arranged between the first electrode 1 and the second electrode 3. The first electrode 1 is grounded, the power supply 4 continuously outputs an alternating current with a peak voltage of 5 kV to the second electrode 3, the sterilization rate is 90%, and the service life of the second electrode 3 is 720 hours.

[0052] Experiment 2

[0053] An air purification device 100 designed according to the technical solution of the present application includes a first electrode 1, a second electrode 3, a power supply 4, and an insulating member 2 arranged between the first electrode 1 and the second electrode 3. The power supply 4 alternately outputs a high voltage with a peak voltage of 5 kV to the first electrode 1 and the second electrode 3. The power supply 4 alternately applies the high voltage to the first electrode 1 and the second electrode 3 at an alternating frequency of 1 Hz. The sterilization rate is 98%, and the service life of the first electrode 1 and the second electrode 3 are both 1000 hours.

[0054] Experiment 3

[0055] An air purification device 100 designed according to the technical solution of the present application includes a first electrode 1, a second electrode 3, a power supply 4, and an insulating member 2 arranged between the first electrode 1 and the second electrode 3. The power supply 4 alternately outputs a high voltage with a peak voltage of 4.5 kV to the first electrode 1 and the second electrode 3. The power supply 4 alternately applies the high voltage to the first electrode 1 and the second electrode 3 at an alternating frequency of 5 Hz. The sterilization rate is 97%, and the service life of the first electrode 1 and the second electrode 3 are both 1000 hours.

[0056] Experiment 4

[0057] An air purification device 100 designed according to the technical solution of the present application includes a first electrode 1, a second electrode 3, a power supply 4, and an insulating member 2 arranged between the first electrode 1 and the second electrode 3. The power supply 4 alternately outputs a high voltage with a peak voltage of 4.2 kV to the first electrode 1 and the second electrode 3. The power supply 4 alternately applies a high voltage to the first electrode 1 and the second electrode 3 at an alternating frequency of 10 Hz, and the sterilization rate is 99%. The service life of the first electrode 1 and the second electrode 3 are both 1000 hours.

[0058] Experiment 5

[0059] An air purification device 100 designed according to the technical solution of the present application includes a first electrode 1, a second electrode 3, a power supply 4, and an insulating member 2 arranged between the first electrode 1 and the second electrode 3. The power supply 4 alternately outputs a high voltage with a peak voltage of 3.6 kV to the first electrode 1 and the second electrode 3. The power supply 4 alternately applies a high voltage to the first electrode 1 and the second electrode 3 at an alternating frequency of 20 Hz, and the sterilization rate is 98%. The service life of the first electrode 1 and the second electrode 3 are both 1000 hours.

[0060] In an exemplary embodiment, the insulating member 2 is configured to be cylindrical, preferably a straight cylindrical shape. The first electrode 1 is disposed inside the insulating member 2 . The second electrode 3 is disposed outside the insulating member 2 .

[0061] The insulating member 2 is cylindrical and simple in structure. The first electrode 1 can discharge inside the insulating member 2, and the second electrode 3 can discharge outside the insulating member 2. The insulating member 2 has discharge areas inside and outside, and has good sterilization and deodorization effects.

[0062] In an exemplary implementation, the first electrode 1 is configured as a strip, preferably a cylinder. The second electrode 3 is configured as a cylinder or a spiral tube. The first electrode 1 is disposed inside the second electrode 3 , and the second electrode 3 is coaxially disposed with the first electrode 1 .

[0063] In this way, the second electrode 3 surrounds the first electrode 1, and the distance between the second electrode 3 and the first electrode 1 is uniform, a relatively uniform electric field can be formed between the first electrode 1 and the second electrode 3, and the first electrode 1 and the second electrode 3 can discharge uniformly at various locations, the discharge area is large, and the active material generation rate is high.

[0064] In an exemplary embodiment, the thickness of the insulating member 2 is uniform. The thickness of the insulating member 2 is the same at all locations, and the influence of the insulating member 2 on the electric field is the same at all locations. The electric field strength of the annular electric field between the first electrode 1 and the second electrode 3 is more uniform, and dielectric barrier discharge can be performed more uniformly.

[0065] In an illustrative embodiment, the second electrode 3 is sleeved on the outer peripheral wall of the insulating member 2 , and the inner side of the second electrode 3 abuts against the outer peripheral wall of the insulating member 2 .

[0066] Since the second electrode 3 is sleeved on the outer peripheral wall of the insulating member 2 , the insulating member 2 can support the second electrode 3 , and no additional fixing device is needed to fix the second electrode 3 .

[0067] In an illustrative embodiment, the air purification device 100 further includes a support structure (not shown in the figure). The support structure is made of an insulating material. The support structure is connected to one end of the insulating member 2, the first electrode 1 and the second electrode 3, and the support structure relatively fixes the insulating member 2, the first electrode 1 and the second electrode 3, and the support structure supports the insulating member 2, the first electrode 1 and the second electrode 3.

[0068] The present application describes multiple embodiments, but the description is exemplary rather than restrictive, and it is obvious to those skilled in the art that there may be more embodiments and implementations within the scope of the embodiments described in the present application. Although many possible feature combinations are shown in the drawings and discussed in the specific embodiments, many other combinations of the disclosed features are also possible. Unless specifically limited, any feature or element of any embodiment may be used in combination with any other feature or element in any other embodiment, or may replace any other feature or element in any other embodiment.

[0069] The present application includes and contemplates combinations of features and elements known to those of ordinary skill in the art. The embodiments, features and elements disclosed in the present application may also be combined with any conventional features or elements to form a unique invention scheme defined by the claims. Any features or elements of any embodiment may also be combined with features or elements from other invention schemes to form another unique invention scheme defined by the claims. Therefore, it should be understood that any feature shown and / or discussed in the present application may be implemented individually or in any appropriate combination. Therefore, except for the limitations made according to the attached claims and their equivalents, the embodiments are not subject to other restrictions. In addition, various modifications and changes may be made within the scope of protection of the attached claims.

[0070] In addition, when describing representative embodiments, the specification may have presented the method and / or process as a specific sequence of steps. However, to the extent that the method or process does not rely on the specific order of the steps described herein, the method or process should not be limited to the steps of the specific order described. As will be understood by those of ordinary skill in the art, other sequences of steps are also possible. Therefore, the specific sequence of the steps set forth in the specification should not be interpreted as a limitation to the claims. In addition, the claims for the method and / or process should not be limited to the steps of performing them in the order written, and those skilled in the art can easily understand that these sequences can be changed and still remain within the spirit and scope of the embodiments of the present application.

Claims

1. An air purification device, characterized in that: include: a first electrode; a second electrode, spaced apart from the first electrode; an insulating member, at least partially disposed between the first electrode and the second electrode to separate the first electrode from the second electrode; a power source electrically connected to the first electrode and the second electrode; The power supply is configured to alternately apply high voltage to the first electrode and the second electrode, and when one of the first electrode and the second electrode is applied with a high voltage, the other of the first electrode and the second electrode is grounded, so that dielectric barrier discharge occurs between the first electrode and the second electrode.

2. The air purification device according to claim 1, characterized in that: The high voltage applied by the power supply to one of the first electrode and the second electrode is a positive voltage, and the high voltage applied by the power supply to the other of the first electrode and the second electrode is a negative voltage.

3. The air purification device according to claim 1, characterized in that: The high voltages applied by the power supply to the first electrode and the second electrode are both positive voltages or both negative voltages.

4. The air purification device according to claim 1, characterized in that: The alternating frequency at which the power source alternately applies the high voltage to the first electrode and the second electrode is negatively correlated with the peak value of the high voltage.

5. The air purification device according to any one of claims 1 to 4, characterized in that: The power source alternately applies high voltage to the first electrode and the second electrode at an alternating frequency of 1 to 20 Hz; and / or The peak voltage of the high voltage is 3.6 kV to 5 kV.

6. The air purification device according to any one of claims 1 to 4, characterized in that: The insulating member is configured in a cylindrical shape, the first electrode is disposed inside the insulating member, and the second electrode is disposed outside the insulating member.

7. The air purification device according to claim 6, characterized in that: The first electrode is configured as a straight strip structure coaxial with the insulating member; The second electrode is configured in a solenoid shape or a cylindrical shape coaxial with the first electrode.

8. The air purification device according to claim 7, characterized in that: The insulating member has a uniform thickness.

9. The air purification device according to claim 7, characterized in that: The second electrode is sleeved on the outer peripheral wall of the insulating member.

10. An air treatment device, characterized in that: The invention comprises an air purification device as claimed in any one of claims 1 to 9.

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