Air purification device and air conditioner

Abstract

The utility model discloses an air purification device and an air conditioner. The air purification device comprises a formaldehyde concentration detection unit and a control unit, the fan driving unit is used for driving the fan to operate; the anion generator is provided with an ion emission needle and is used for emitting anions at the emission tip of the ion emission needle when the power supply unit applies negative high voltage to the ion emission needle; the main control unit is respectively connected with the formaldehyde concentration detection unit, the fan driving unit and the negative ion generator; the zero level area is provided with a plurality of step surfaces, and the distances between the step surfaces and the emission tip are different; the driving end of the moving driving unit is connected with the zero-level area, and the main control unit controls the position of the zero-level area to remain unchanged or drives the zero-level area to move in the direction of changing the distance between the step surface of the zero-level area and the emission tip according to the received formaldehyde concentration. The air purification device can achieve closed-loop control of formaldehyde concentration, air purification is achieved, and meanwhile potential safety hazards of a user are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of air purification, in particular to an air purification device and an air conditioner with the air purification device. Background Art

[0002] At present, the ion output device of the ion module used on an air purification device (for example, an air conditioner) is a fixed structure, and the distance between two or more output ion poles is fixed. Therefore, under the same current input, the ion module can only achieve one ion concentration and ozone concentration output, and cannot meet the different ion concentration / ozone concentration requirements in different usage scenarios. Moreover, the positive and negative ion output and ozone generation of the positive and negative ion module are greatly affected by the pole pitch.

[0003] When the pole pitch between the positive and negative output poles is small, at this time, more positive and negative ions are neutralized, and more high-energy and active substances are generated. At this time, the disinfection effect is better. However, in this case, the remaining positive and negative ions are less, the spatial transmission distance is short, and the ability of the positive and negative ions themselves to combine with and settle dust in the air is poor. When the pole pitch between the positive and negative output poles is small, the generated ozone concentration is high, and the surface disinfection effect is good, but it is easy to cause the accumulation of ozone concentration in the space and cause discomfort to users.

[0004] When the pole pitch between the positive and negative output poles is large, the contact between the positive and negative ions is less, and the remaining positive and negative ions after neutralization are more. The remaining positive and negative ions contact and settle with microscopic substances such as dust in the air. Therefore, the space dust removal effect is good, and the generated ozone concentration is low at the same time. However, at this time, the settled microscopic substances, such as bacteria and viruses, are only settled and not effectively removed, so there is a risk of secondary pollution.

[0005] Therefore, how to balance the disinfection effect and the user experience is a problem that needs to be solved. Summary of the Utility Model

[0006] In view of the problems pointed out in the background art, some embodiments of the present application relate to an air purification device. The control module controls the distance between the zero-level region and the emission tip of the negative ion generator according to the received formaldehyde concentration, generates ozone with a changing concentration, and realizes the closed-loop control of the formaldehyde concentration, which not only effectively eliminates formaldehyde, but also does not leave too much ozone remaining, avoiding potential safety hazards to users.

[0007] To achieve the above-mentioned utility model purpose, the present utility model adopts the following technical solutions to be implemented:

[0008] An embodiment of the present application provides an air purification device, including:

[0009] A formaldehyde concentration detection unit for detecting the formaldehyde concentration in the environment where the air purification device is located;

[0010] A fan driving unit that drives the fan to operate;

[0011] A negative ion generator having ion emission needles for emitting negative ions at the emission tips of the ion emission needles when a negative high voltage is applied to the negative ion generator by a power supply unit;

[0012] A main control unit connected to a formaldehyde concentration detection unit, a fan driving unit, and a negative ion generator respectively;

[0013] A zero - level region having a plurality of stepped surfaces, and the distances between each stepped surface and the emission tip are different;

[0014] A moving driving unit whose driving end is connected to the zero - level region. The main control unit controls the position of the zero - level region to remain unchanged or drives the zero - level region to move in a direction that changes the distance between its stepped surface and the emission tip according to the formaldehyde concentration detected by the formaldehyde concentration detection unit.

[0015] Some embodiments of the present application relate to an air purification device. When negative ions are emitted at the emission tip, a leakage current is formed between the negative ions and the zero - level of the zero - level region to decompose oxygen in the air into oxygen atoms. The oxygen atoms combine with oxygen to form ozone, thereby using ozone to decompose and eliminate formaldehyde. The air purification device can adjust the distance between the emission tip and the stepped surface of the zero - level region according to different formaldehyde concentrations in the environment, thereby adjusting the leakage current intensity between the negative ions and the zero - level to adjust the amount of ozone generated, so as to match different formaldehyde concentrations for decomposition and elimination.

[0016] Matching different formaldehyde concentrations with corresponding amounts of ozone can achieve the sterilization and purification effect while avoiding the generation of excessive ozone, which poses a safety hazard to the human body.

[0017] In some embodiments of the present application, the length direction of the ion emission needle is parallel to the moving direction of the zero - level region;

[0018] After the moving driving unit drives the zero - level region to move in place, the emission tip is facing a stepped surface.

[0019] The emission tip facing the stepped surface facilitates the effective contact between the negative ions and the zero - level, generating available oxygen atoms, and then generating ozone.

[0020] In some embodiments of the present application, the air purification device further includes:

[0021] An insulating part, with the moving driving unit and the zero - level region arranged on one side and the ion emission needles arranged on the other side;

[0022] The emission tip extends beyond the insulating part;

[0023] When the moving drive unit drives the zero - level region to move in the positive moving direction, each step surface of the zero - level region continuously moves beyond the insulating part;

[0024] When the moving drive unit drives the zero - level region to move in the negative moving direction, the remaining step surfaces inside the outermost step surface continuously move to be shielded by the insulating part.

[0025] An insulating part is provided to separate both the zero - level region and the moving drive unit from the ion emission needle, avoiding damage to the moving drive unit and the zero - level region caused by negative high voltage, and by moving the zero - level region, the distance between the emission tip and the step surface is changed, and the magnitude of the generated leakage current is changed.

[0026] In some embodiments of the present application, the power supply module includes:

[0027] A power circuit that provides a DC voltage;

[0028] A first boost module connected to the output of the power circuit for boosting the voltage;

[0029] A first rectification module connected to the output end of the first boost module for rectifying the high voltage output by the first boost module to a negative high voltage.

[0030] In some embodiments of the present application, the power supply module includes:

[0031] A second boost module for boosting the voltage;

[0032] A power control module that can adjust the voltage of the AC power input to the second boost module;

[0033] A second rectification module connected to the output end of the second boost module for rectifying the high voltage output by the second boost module to a negative high voltage.

[0034] The negative - ion generator involved in the present application can adjust the voltage input to the ion emission needle through the power control module, thereby changing the ion concentration of the ion emission needle, and can meet the different requirements of users for the negative - ion concentration in different spaces or different scenarios.

[0035] In some embodiments of the present application, the main control unit configures different step surfaces corresponding to different formaldehyde concentration ranges;

[0036] When the main control unit receives the detected formaldehyde concentration, according to the formaldehyde concentration range where the formaldehyde concentration is located, the main control unit controls the moving drive unit to drive the zero-level area to move, so that the end of the emission tip faces the step surface corresponding to the formaldehyde concentration range;

[0037] Among them, the distance between the step surface corresponding to a larger formaldehyde concentration range and the emission tip is smaller, and the distance between the step surface corresponding to a smaller formaldehyde concentration range and the emission tip is larger.

[0038] The closer the distance between the emission tip and the step surface, the greater the leakage current generated, and thus the more ozone is generated, which is suitable for an environment with a higher formaldehyde concentration. The farther the distance between the emission tip and the step surface, the smaller the leakage current generated, and thus the less ozone is generated, which is suitable for an environment with a lower formaldehyde concentration. Adjust the amount of ozone generated according to the formaldehyde concentration to flexibly meet the needs of multiple environmental scenarios.

[0039] In some embodiments of the present application, the moving drive unit is a drive motor, and the air purification device further includes:

[0040] A power transmission unit, which is used to convert the driving force output by the drive motor into a linear reciprocating motion of the zero-level area.

[0041] In some embodiments of the present application, the power transmission unit includes:

[0042] An embedding area, which is formed on the zero-level area, and an internal thread is formed inside the embedding area. An external thread that mates with the internal thread is formed on the output shaft of the drive motor. When the drive motor operates, it drives the zero-level area to move linearly along the output shaft.

[0043] Some embodiments of the present application further relate to an air conditioner, including:

[0044] An indoor machine case, on which an air return opening and an air outlet are formed;

[0045] A formaldehyde concentration detection unit, which is used to detect the formaldehyde concentration in the environment where the air conditioner is located;

[0046] An air purification device, which is located inside the indoor machine case and installed at the air outlet. The air purification device includes:

[0047] A negative ion generator, which has an ion emission needle and is used to emit negative ions at the emission tip of the ion emission needle when the power supply unit applies a negative high voltage to the negative ion generator;

[0048] A zero-level area, which has a plurality of step surfaces, and the distances between each step surface and the emission tip are different;

[0049] A moving drive unit, whose drive end is connected to the zero - level area. The indoor main control unit controls the position of the zero - level area to remain unchanged or drives the zero - level area to move in a direction that changes the distance between its stepped surface and the emission tip according to the formaldehyde concentration detected by the formaldehyde concentration detection unit received.

[0050] An indoor fan, which is connected to the indoor main control unit and is used to send the indoor return air out from the air outlet after passing through the air purification device.

[0051] In some embodiments of the present application, the air conditioner further includes:

[0052] A wired controller, the formaldehyde concentration detection unit is arranged in the wired controller and is connected to the main board in the wired controller. The wired controller is communicatively connected to the indoor main control unit.

[0053] After reading the specific embodiments of the present utility model in conjunction with the accompanying drawings, other features and advantages of the present utility model will become clearer. Brief Description of the Drawings

[0054] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following - described drawings are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0055] Figure 1 It is a principle block diagram of an air conditioner embodiment according to the present application;

[0056] Figure 2 It is a structural block diagram of an air purification device embodiment according to the present application;

[0057] Figure 3 It is a power supply diagram of a negative - ion emission needle in an air purification device embodiment according to the present application;

[0058] Figure 4 It is the principle of the power supply unit in an air purification device embodiment according to the present application Figure 1 ;

[0059] Figure 5 It is the principle of the power supply unit in an air purification device embodiment according to the present application Figure 2 ;

[0060] Figure 6 It is a schematic diagram when the zero - level area in an air purification device embodiment according to the present application is in the initial position;

[0061] Figure 7 Schematic diagram when the zero - level region is in the first position in the embodiment of the air purification device according to the present application;

[0062] Figure 8 Schematic diagram when the zero - level region is in the second position in the embodiment of the air purification device according to the present application;

[0063] Figure 9 Schematic flow chart when the air purification device embodiment according to the present application is operating;

[0064] Figure 10 Structural block diagram of the air conditioner embodiment according to the present application;

[0065] Reference numerals:

[0066] 100 / 300, air purification device; 110, main control unit; 120, fan drive unit; 130 / 320, mobile drive unit; 131, output shaft; 140 / 330, zero - level region; 141, first step surface; 142, second step surface; 143, third step surface; 144, embedding area; 150 / 240, formaldehyde concentration detection unit; 160 / 310, negative ion generator; 161, ion emission needle; 170, power supply unit; 171, power circuit; 172, first boost module; 173, first rectification module; 174, power control module; 175, second boost module; 176, second rectification module; 180, insulation part; 200, indoor unit; 210, indoor main control unit; 220, indoor fan; 230, remote controller. Detailed implementation manners

[0067] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0068] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.

[0069] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0070] In the description of the present application, it should be noted that, unless otherwise clearly specified and defined, the terms "mounted", "connected" and "coupled" shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection or an integral connection; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0071] In the present utility model, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "below" and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely means that the horizontal height of the first feature is lower than that of the second feature.

[0072] The following disclosure provides many different embodiments or examples for implementing different structures of the present utility model. To simplify the disclosure of the present utility model, the components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit the present utility model. In addition, the present utility model may repeat reference numerals and / or reference letters in different examples. Such repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present utility model provides examples of various specific processes and materials, but those of ordinary skill in the art may be aware of the application of other processes and / or the use of other materials.

[0073] In order to monitor the concentration of substances such as formaldehyde in the air, the present application relates to an air purification device 100 / 300, which uses negative ions generated by an ion emission needle, and the leakage current that can be generated between it and the zero level. The leakage current can ionize oxygen to generate oxygen atoms, which then combine with oxygen in the air to generate ozone to eliminate and decompose formaldehyde in the environment, so as to achieve the purpose of air purification.

[0074] In some embodiments of the present application, the air purification device can be used in an air conditioner. After the return air flow passes through the air purification device, oxygen atoms are ionized. Then, under the action of the indoor fan, the air flow containing oxygen atoms is blown into the room, so that the oxygen atoms can combine with the indoor air flow to generate ozone.

[0075] In some embodiments of the present application, the air purification device can also be used in combination with an air purifier.

[0076] As follows, first describe the basic working principle of the air conditioner.

[0077] Refer to Figure 1 , which shows a schematic structural diagram of the air conditioner.

[0078] The air conditioner performs a refrigeration cycle of the air conditioner by using a compressor, a condenser, an expansion valve, and an evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion, and evaporation to cool or heat the indoor space.

[0079] The low-temperature and low-pressure refrigerant enters the compressor, and the compressor compresses it into a refrigerant gas in a high-temperature and high-pressure state and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and the heat is released to the surrounding environment through the condensation process.

[0080] The expansion valve expands the high-temperature and high-pressure liquid-phase refrigerant formed by condensation in the condenser into a low-pressure liquid-phase refrigerant. The evaporator evaporates the refrigerant expanded in the expansion valve and returns the refrigerant gas in a low-temperature and low-pressure state to the compressor. The evaporator can achieve a refrigeration effect by using the latent heat of evaporation of the refrigerant for heat exchange with the material to be cooled. In the whole cycle, the air conditioner can adjust the temperature of the indoor space.

[0081] The outdoor unit of the air conditioner refers to the part of the refrigeration cycle including the compressor and the outdoor heat exchanger. The indoor unit of the air conditioner includes the indoor heat exchanger, and the expansion valve can be provided in the indoor unit or the outdoor unit.

[0082] The indoor heat exchanger and the outdoor heat exchanger are used as condensers or evaporators. When the indoor heat exchanger is used as a condenser, the air conditioner serves as a heater in the heating mode. When the indoor heat exchanger is used as an evaporator, the air conditioner serves as a cooler in the cooling mode.

[0083] In some embodiments of the present application, refer to Figures 2 to 9 , first describe the structure of the air purification device 100.

[0084] Refer to Figure 1, the air purification device 100 includes a formaldehyde concentration detection unit 150 and a main control unit 110. The main control unit 110 is the main control center of the air purification device 100. The formaldehyde concentration detection unit 150 is used to detect the formaldehyde concentration in the surrounding environment and send the formaldehyde concentration to the main control unit 110 in real time.

[0085] The formaldehyde concentration detection unit 150 can select a formaldehyde concentration sensor, and one or more can be installed in the environment. When multiple are installed, the average value of the formaldehyde concentrations detected by the multiple formaldehyde concentration detection units 150 is finally used to measure the formaldehyde concentration of the environment.

[0086] In some embodiments of the present application, the air purification device 100 includes a fan drive unit 120. The fan drive unit 120 is connected to the main control unit 110 through a communication circuit and is used to control the operation of the fan to generate a flowing air current. The flowing air current disturbs the air current in the environment, facilitating the rapid dispersion of the oxygen atoms generated by ionization and the combination with oxygen in the air to form ozone.

[0087] In some embodiments of the present application, see Figure 2 and Figure 3 , the air purification device 100 includes a negative ion generator 160. The negative ion generator 160 has an ion emission needle 161. When the power supply unit 170 applies a negative high voltage to the ion emission needle 161, negative ions are emitted at the emission tip of the ion emission needle 161.

[0088] The negative ions generated are mixed with the air and can play a role in purifying the air (such as sterilization and disinfection).

[0089] In some embodiments of the present application, see Figure 4 , the power supply unit 170 includes a first boost module 172 and a first rectification module 173.

[0090] The power supply circuit 171 is connected to the first boost module 172, and the output end of the first boost module 172 is connected to the ion emission needle 161 through the first rectification module 173.

[0091] The power supply circuit 171 may include a DC power supply, a voltage regulator chip and its peripheral circuits.

[0092] The first boost module 172 is connected to the output of the power supply circuit 171 and is used to boost the DC voltage to a high voltage signal, and then rectify it to a negative high voltage through the first rectification module 173 to supply power to the ion emission needle 161.

[0093] In some embodiments of the present application, see Figure 5 , the power supply unit 170 includes a power control module 174, a second boost module 175 and a second rectification module 176.

[0094] The power control module 174 can adjust the input voltage to the second boost module 175. The second boost module 175 boosts the input voltage to the required high-voltage signal, and this high-voltage signal is rectified to a negative voltage by the second rectification module 176 to supply power to the ion emission needle 161.

[0095] In some embodiments of the present application, refer to Figure 5 , the power control module 174 has a built-in sliding rheostat RT, which is adjustable by the user. By adjusting the resistance value of the sliding rheostat RT, the voltage input to the second boost module 175 can be adjusted, so that the voltage input to the second boost module 175 varies within a certain range.

[0096] In some embodiments of the present application, the power control module 174 controls and adjusts the output voltage of the emission tip of the ion emission needle 161, which can vary between -1 KV and -5 KV.

[0097] The live wire L of the AC power supply is connected to the second boost module 175 after passing through the series-connected first current-limiting resistor R1 and the sliding rheostat RT, and the neutral wire N of the AC power supply is connected to the ground terminal of the second boost module 175 through the second current-limiting resistor R2

[0098] The output terminal of the second boost module 175 is connected to the ion emission needle 161 through the second rectification module 176, and the ground terminal of the second boost module 175 is connected to the ground terminal through the series-connected first safety isolation resistor R3 and the second safety isolation resistor R4.

[0099] Wherein the ground terminal can be the ground wire of the device using the negative ion generator 160 or on the grounding sheet metal.

[0100] By adjusting the resistance value of the sliding rheostat RT, the voltage input to the second boost module 175 can be changed, thereby changing the negative high voltage supplied to the ion emission needle 161, and further adjusting the negative ion concentration emitted by the ion emission needle 161.

[0101] In some embodiments of the present application, the adjustment of the resistance value of the sliding rheostat RT can be operated by the user, which is convenient for the user to flexibly adjust the negative ion concentration according to different requirements or different scenarios.

[0102] The second boost module 175 as described above can be a transformer.

[0103] In some embodiments of the present application, refer to Figure 2 、 Figures 6 to 8 , the air purification device 100 further includes a zero-level region 140 and a mobile drive unit 130. The mobile drive unit 130 is connected to the main control unit 110 and is used to drive the zero-level region 140 to move when the main control unit 110 issues a drive signal.

[0104] This zero - level region 140 has multiple stepped surfaces, and the distances of each stepped surface from the emission tip are different. Refer to Figures 6 to 8 .

[0105] In some embodiments of the present application, the zero - level region 140 provides a grounding function. When negative ions are generated at the emission tip, the negative ions come into contact with the zero - level region 140 for reflux to generate a leakage current. The leakage current ionizes oxygen in the air to generate oxygen atoms, and the oxygen atoms combine with oxygen in the air to form ozone, thereby achieving the elimination and decomposition of formaldehyde.

[0106] The stepped surfaces corresponding to the emission tip are different, the magnitudes of the generated leakage currents are different, and the corresponding amounts of generated ozone are also different.

[0107] The greater the distance between the emission tip and the stepped surface, the fewer the negative ions in effective contact with the stepped surface, the smaller the leakage current generated by reflux, and the smaller the corresponding amount of generated ozone; the smaller the distance between the emission tip and the stepped surface, the more the negative ions in effective contact with the stepped surface, the greater the leakage current generated by reflux, and the greater the corresponding amount of generated ozone.

[0108] Therefore, in order to achieve closed - loop control of the formaldehyde concentration, that is, when the formaldehyde concentration is high, make the amount of generated ozone large, so as to be able to eliminate and decompose more formaldehyde, thus reducing the formaldehyde concentration; when the formaldehyde concentration is low, make the amount of generated ozone small, so as to be able to eliminate and decompose less formaldehyde, thus ensuring that the formaldehyde concentration is at a certain level.

[0109] In some embodiments of the present application, according to the magnitude of the formaldehyde concentration, the main control unit 110 controls the moving drive unit 130 to drive the zero - level region 140 to move, so as to change the distance between the emission tip and the stepped surface.

[0110] For example, the distances between each continuous stepped surface and the emission tip gradually decrease along the direction in which the zero - level region 140 moves away from the moving drive unit 130 (refer to the solid single - arrow direction shown in Figure 6 ), and gradually increase along the direction in which the zero - level region 140 moves closer to the moving drive unit 320 (refer to the dashed single - arrow direction shown in Figure 6 ).

[0111] When the main control unit 110 detects that the formaldehyde concentration increases, it drives the zero - level region 140 to move along the direction away from the moving drive unit 130. Refer to the movement change from Figures 6 to 8 ; when the main control unit 110 detects that the formaldehyde concentration decreases, it drives the zero - level region 140 to move along the direction closer to the moving drive unit 130. Refer to the movement change from Figures 8 to 6 .

[0112] In some embodiments of the present application, refer toFigures 6 to 8 , the length direction of the ion emission needle 161 is parallel to the moving direction of the zero-level region 140 and has a certain distance, providing space for the leakage current to ionize oxygen in the air.

[0113] After the moving drive unit 130 drives the zero-level region 140 to move in place, the emission tip faces a step surface. In this way, the negative ions generated at the emission tip can effectively make electrical contact with the step surface.

[0114] In some embodiments of the present application, the moving drive unit 130 can be a drive motor, which converts the rotational force into a linear reciprocating motion of the zero-level region 140 through a power transmission unit (not shown).

[0115] The power transmission unit can be a gear-rack assembly, a screw assembly, etc.

[0116] In some embodiments of the present application, see Figures 6 to 8 , the power transmission unit includes an embedding area 144.

[0117] The embedding area 144 is formed on the zero-level region 140, and an internal thread is formed inside the embedding area 144. An external thread that mates with the internal thread is formed on the output shaft 131 of the drive motor. When the drive motor works, it drives the zero-level region 140 to move linearly back and forth along the output shaft 131.

[0118] In some embodiments of the present application, in order to make the air purification device 100 work more reliably, the air purification device 100 further includes an insulating part 180.

[0119] One side of the insulating part 180 is provided with the moving drive unit 130 and the zero-level region 140, and the other side is provided with the ion emission needle 161.

[0120] See Figures 6 to 8 , the emission tip extends beyond the insulating part 180, that is, the negative ions emitted by the emission tip are not isolated by the insulating part 180 and thus not transmitted to the zero-level region 140.

[0121] When the moving drive unit 130 drives the zero-level region 140 to move in a direction away from the moving drive unit 130, each step surface of the zero-level region 140 continuously moves beyond the insulating part 180. See Figures 6 to 8 for the change.

[0122] When the moving drive unit 130 drives the zero-level region 140 to move in a direction close to the moving drive unit 130, the remaining step surfaces inside the outermost step surface continuously move to be shielded by the insulating part 180, that is, the step surfaces shielded by the insulating part 180 cannot receive negative ions. See Figures 8 to 6 for the change.

[0123] Refer to Figures 6 to 8 , in some embodiments of the present application, three consecutive stepped surfaces are provided, which are respectively denoted as the first stepped surface 141, the second stepped surface 142, and the third stepped surface 143 according to the distance from the moving drive unit 130.

[0124] When the first stepped surface 141, the second stepped surface 142, and the third stepped surface 143 face the emission tip, the distances from the emission tip to the first stepped surface, the second stepped surface 142, and the third stepped surface 143 decrease in sequence.

[0125] Refer to Figure 6 , at the initial position of the zero-level region 140, the first stepped surface 141 extends beyond the insulating portion 180, and both the second stepped surface 142 and the second stepped surface 142 are shielded by the insulating portion 180. At this time, only the first stepped surface 141 contacts a small amount of negative ions, and the leakage current generated by forming a loop is also small.

[0126] Refer to Figure 7 , when the moving drive unit 130 drives the zero-level region 140 to move in the direction away from the moving drive unit 130, the second stepped surface 142 moves beyond the insulating portion 180 (the third stepped surface 143 is shielded by the insulating portion 180, and the first stepped surface 141 has exceeded the insulating portion 180). At this time, most of the negative ions mainly contact the second stepped surface 142 and at the same time a small amount of negative ions contact the first stepped surface 141.

[0127] Since the distance L1 from the emission tip to the first stepped surface 141 is greater than the distance L2 to the second stepped surface 142, therefore, the number of negative ions flowing back through the second stepped surface 142 is relatively large, and the generated leakage current is relatively large. At the same time, some negative ions will also flow back through the first stepped surface 141, generating partial leakage current.

[0128] Refer to Figure 8 , when the moving drive unit 130 drives the zero-level region 140 to continue moving in the direction away from the moving drive unit 130, the third stepped surface 143 moves beyond the insulating portion 180 (both the first stepped surface 141 and the second stepped surface 142 have exceeded the insulating portion 180). At this time, most of the negative ions mainly contact the third stepped surface 143 and at the same time a small amount of negative ions contact the first stepped surface 141 and the second stepped surface 142.

[0129] Since the distances L1, L2, and L3 from the emission tip to the first stepped surface 141, the second stepped surface 142, and the third stepped surface 143 decrease in sequence, therefore, the number of negative ions flowing back through the third stepped surface 143 is even more, and the generated leakage current is even greater. At the same time, some negative ions will also flow back through the first stepped surface 141 and the second stepped surface 142, generating partial leakage current.

[0130] It is directly proportional to the magnitude of the leakage current generated, the number of oxygen atoms generated by ionization, and the amount of ozone. That is, the larger the leakage current, the more oxygen atoms are generated by ionization, and the larger the amount of ozone; the smaller the leakage current, the fewer oxygen atoms are generated by ionization, and the smaller the amount of ozone.

[0131] The distances L1 / L2 / L3 as described above all refer to the vertical distance between the emission tip and the step surface (see Figures 6 to 8 shown in), that is, the line connecting the emission tip to the step surface is perpendicular to the step surface, and the middle position between the emission tip and the step surface is directly opposite, ensuring that the negative ions generated by the emission tip are in effective contact with the step surface.

[0132] In some embodiments of the present application, for the case where the zero - level region 140 moves to different distances from the step surface to the emission tip, different formaldehyde concentration ranges can be set.

[0133] For the zero - level region 140 with three step surfaces as above, three different formaldehyde concentration ranges can be set, which are respectively denoted as the first formaldehyde concentration range, the second formaldehyde concentration range, and the third formaldehyde concentration range. Among them, the first formaldehyde concentration range, the second formaldehyde concentration range, and the third formaldehyde concentration range increase in sequence.

[0134] See Figure 9 , when the air purification device 100 is working and the air purification function is turned on, first, the main control unit 110 controls both the negative ion generator 160 and the fan drive unit 120 to work, and simultaneously receives in real - time the formaldehyde concentration detected by the formaldehyde concentration detection unit 150.

[0135] When the formaldehyde concentration detected by the formaldehyde concentration detection unit 150 is within the first formaldehyde concentration range, that is, the current formaldehyde concentration is relatively low. At this time, the main control unit 110 controls the movement drive unit 130 not to work, and the zero - level region 140 is in the initial position (that is, Figure 6 the position shown), maintaining only the first step surface 141 opposite to the emission tip, that is, the distance between the first step surface 141 and the emission tip is L1.

[0136] At this time, a first leakage current is generated, and then a first amount of ozone is generated to eliminate and decompose formaldehyde in the current environment.

[0137] When the formaldehyde concentration detected by the formaldehyde concentration detection unit 150 is within the second formaldehyde concentration range, that is, the current formaldehyde concentration is relatively high. At this time, the main control unit 110 controls the movement drive unit 130 to work, and the zero - level region 140 is driven to move away from the movement drive unit 130 until the middle position between the second step surface 142 and the emission tip is directly opposite, that is, the distance between the second step surface 142 and the emission tip is L2 (that is, Figure 7 the position shown, and the position where the zero - level region 140 is located at this time is called the first position).

[0138] At this time, a second leakage current is generated, and then a second amount of ozone is generated to eliminate and decompose formaldehyde in the current environment.

[0139] When the formaldehyde concentration detected by the formaldehyde concentration detection unit 150 is within the third formaldehyde concentration range, that is, the current formaldehyde concentration is higher. At this time, the main control unit 110 controls the mobile drive unit 130 to work, and the zero-level region 140 is driven to move away from the mobile drive unit 130 until the middle position of the third step surface 143 is directly opposite to the emission tip, that is, the distance between the third step surface 143 and the emission tip is L3 (that is, Figure 8 the position shown in the figure, and the position where the zero-level region 140 is located at this time is called the second position).

[0140] At this time, a third leakage current is generated, and then a third amount of ozone is generated to eliminate and decompose formaldehyde in the current environment.

[0141] Among them, the first leakage current, the second leakage current, and the third leakage current increase in sequence, and the first amount of ozone, the second amount of ozone, and the third amount of ozone also increase in sequence.

[0142] As described above, by detecting the formaldehyde concentration in real time and moving the zero-level region 140 to perform closed-loop control on the formaldehyde concentration, while realizing the air purification effect, it also avoids potential safety hazards caused by excessive formaldehyde and ozone amounts to users.

[0143] As above, the working time required for the mobile drive unit 130 to move the zero-level region 140 from the initial position to the first position can be set as T1, and the working time required for the mobile drive unit 130 to move from the first position to the second position can be set as T2. Then, the working time required for the mobile drive unit 130 to move from the initial position to the second position is T1 + T2.

[0144] In some embodiments of the present application, more than three step surfaces can also be provided on the zero-level region 140. Correspondingly, multiple different formaldehyde concentration ranges are set, so as to perform refined control on the formaldehyde concentration.

[0145] In some embodiments of the present application, referring to Figure 10 ..., it also relates to an air conditioner.

[0146] The air conditioner includes an indoor unit 200, and the indoor unit 200 includes an indoor main control unit 210, an indoor fan 220, and an indoor casing (not shown).

[0147] An air return opening and an air outlet are formed on the indoor casing. The air return opening is used to return the indoor air flow, and the air outlet is used to discharge the air flow with adjusted temperature into the indoor environment via the indoor fan 220 for adjusting the indoor temperature.

[0148] In order to implement the formaldehyde purification function of the air conditioner on the basis of the original air conditioner, the air conditioner further includes a formaldehyde concentration detection unit and an air purification device 300.

[0149] Among them, the air purification device 300 is located inside the indoor casing and installed at the air outlet. Before the air flow to be discharged passes through the air outlet, the air flow to be discharged will first pass through the air purification device 300 for purification and then be discharged into the indoor environment.

[0150] As described above, the formaldehyde concentration detection unit is used to detect the formaldehyde concentration in the indoor environment where the air conditioner is located.

[0151] In some embodiments of the present application, the air purification device 300 includes a negative ion generator 310, a zero-level region 330, and a moving drive unit 320.

[0152] The structures of the negative ion generator 310, the zero-level region 330, and the moving drive unit 320 as described above can all refer to Figures 2 to 9 The negative ion generator 160, the zero-level region 140, and the moving drive unit 130 as described above and their designs will not be elaborated here.

[0153] And both the negative ion generator 310 and the moving drive unit 320 are connected to the indoor main control unit 210.

[0154] In some embodiments of the present application, the formaldehyde concentration detection unit can be set in the indoor environment and is communicatively connected to the indoor main control unit 210, and is used to send the real-time detected formaldehyde concentration to the indoor main control unit 210 for processing.

[0155] In some embodiments of the present application, referring to Figure 10 , the air conditioner further includes a wired controller 230. The formaldehyde concentration detection unit 240 can be set inside the wired controller 230, and the formaldehyde concentration detection unit 240 is connected to the main board inside the wired controller 230.

[0156] Since the wired controller 230 itself is communicatively connected to the indoor main control unit 210, therefore, the formaldehyde concentration detection unit 240 can send the real-time detected formaldehyde concentration to the indoor main control unit 210 for processing.

[0157] In the description of the above embodiments, specific features, structures, materials, or characteristics can be combined in a suitable manner in any one or more embodiments or examples.

[0158] The above are only specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present utility model should be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.

Claims

1. An air purification device, characterized in that: include: A formaldehyde concentration detection unit, which is used to detect the formaldehyde concentration in the environment where the air purification device is located; A fan driving unit, which drives the fan to operate; A negative ion generator having an ion emitting needle for emitting negative ions at an emitting tip of the ion emitting needle when a power supply unit applies a negative high voltage to the ion emitting needle; A main control unit, which is respectively connected to the formaldehyde concentration detection unit, the fan drive unit and the negative ion generator; a zero level region having a plurality of step surfaces, and each step surface has a different distance from the emission tip; A mobile driving unit, whose driving end is connected to the zero-level area, controls the position of the zero-level area to remain unchanged, or drives the zero-level area to move in a direction that changes the distance between its step surface and the emission tip according to the formaldehyde concentration detected by the formaldehyde concentration detection unit.

2. The air purification device according to claim 1, characterized in that: The length direction of the ion emission needle is parallel to the moving direction of the zero level area; After the mobile driving unit drives the zero-level area to move to a position, the emission tip faces a step surface.

3. The air purification device according to claim 2, characterized in that: The air purification device also includes: An insulating part, one side of which is provided with the mobile driving unit and the zero-level area, and the other side of which is provided with the ion emitting needle; The emitting tip extends beyond the insulating portion; When the mobile driving unit drives the zero-level region to move in a direction away from the mobile driving unit, each step surface of the zero-level region continuously moves beyond the insulating portion; When the mobile driving unit drives the zero-level area to move closer to the mobile driving unit, the remaining step surfaces inside the outermost step surface continuously move until they are shielded by the insulating portion.

4. The air purification device according to claim 1, characterized in that: The power supply unit comprises: a power supply circuit that provides a DC voltage; A first boost module, connected to the output of the power supply circuit and used for boosting the voltage; The first rectifier module is connected to the output end of the first boost module and is used for rectifying the high voltage output by the first boost module into a negative high voltage.

5. The air purification device according to claim 1, characterized in that: The power supply unit comprises: A second boost module, which is used to boost the voltage; A power control module capable of adjusting the voltage of the AC power input to the second boost module; The second rectifier module is connected to the output end of the second boost module and is used for rectifying the high voltage output by the second boost module into a negative high voltage.

6. The air purification device according to claim 1, characterized in that: The main control unit is configured with different formaldehyde concentration ranges corresponding to different step surfaces; When the main control unit receives the detected formaldehyde concentration, according to the formaldehyde concentration range in which the formaldehyde concentration is located, the main control unit controls the mobile driving unit to drive the zero level area to move so that the end of the emission tip is opposite to the step surface corresponding to the formaldehyde concentration range; Among them, the larger the formaldehyde concentration range, the smaller the distance between the corresponding step surface and the emission tip, and the smaller the formaldehyde concentration range, the larger the distance between the corresponding step surface and the emission tip.

7. The air purification device according to claim 1, characterized in that: The mobile driving unit is a driving motor, and the air purification device also includes: A power transmission unit is used to convert the driving force output by the driving motor into a linear reciprocating motion in the zero level area.

8. The air purification device according to claim 7, characterized in that: The power transmission unit comprises: An embedded area is formed on the zero-level area, and an internal thread is formed inside the embedded area. An external thread matching the internal thread is formed on the output shaft of the drive motor. When the drive motor is working, it drives the zero-level area to move linearly along the output shaft.

9. An air conditioner, characterized in that: include: An indoor casing having an air return port and an air outlet formed thereon; A formaldehyde concentration detection unit, which is used to detect the formaldehyde concentration in the environment where the air conditioner is located; An air purification device, which is located in the indoor casing and installed at the air outlet, and includes: A negative ion generator having an ion emitting needle for emitting negative ions at an emitting tip of the ion emitting needle when a power supply unit applies a negative high voltage to the negative ion generator; a zero level region having a plurality of step surfaces, and each step surface has a different distance from the emission tip; A mobile driving unit, wherein a driving end of the mobile driving unit is connected to the zero-level area, and an indoor main control unit controls the position of the zero-level area to remain unchanged, or drives the zero-level area to move in a direction to change the distance between the step surface and the emission tip according to the formaldehyde concentration detected by the formaldehyde concentration detection unit; The indoor fan is connected to the indoor main control unit and is used to send the indoor return air out from the air outlet after passing through the air purification device.

10. The air conditioner according to claim 9, characterized in that: The air conditioner also includes: A wire controller, wherein the formaldehyde concentration detection unit is arranged in the wire controller and connected to a main board in the wire controller, and the wire controller is communicatively connected to the indoor main control unit.

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