CN215724459U - Purification module, purification device and refrigerator - Google Patents

Abstract

The utility model relates to refrigerator odor purification and discloses a purification module which comprises a plate electrode (1), a catalytic medium (2) and a wire electrode (3); the catalytic medium (2) is arranged between the plate-shaped electrode (1) and the wire electrode (3), and the peripheries of the plate-shaped electrode (1) and the wire electrode (3) are provided with insulating covered edges (4). Can prevent abnormal discharge of the plate-like electrode (1) or the wire-like electrode (3) and reduce ozone generation. The utility model also discloses a purification device, wherein the power module (6) is arranged at the air inlet (83) of the module, so that the heat dissipation effect of the power module is improved, the reliability of the power module (6) is improved, and the service life of the power module is prolonged. In addition, the utility model also discloses a refrigerator.

Description

Purification module, purification device and refrigerator

Technical Field

The utility model relates to refrigerator deodorization, in particular to a purification module. In addition, the utility model also relates to a purification device and a refrigerator.

Background

When a user uses the refrigerator, various food materials are put into the refrigerator. In the using process of the refrigerator, due to long-time sealing, a large amount of odor can be generated on food stored in the refrigerator, and the odor generated by different foods is mixed, so that unpleasant odor can be generated, and the using experience of a user is influenced. In order to remove the bad smell in the refrigerator, more and more smell-clearing technologies are used in the refrigerator.

The plasma purification technology has better smell removal effect, and the plasma purification module is increasingly used for removing smell in the refrigerator. But the survival time of the plasma is shorter, the generation amount of the plasma of the traditional purification module is less, the contact time of the plasma and the peculiar smell molecules is shorter, and the capability of decomposing the peculiar smell molecules is poorer.

With the development of technology, a technology of disposing a catalytic medium in a high-voltage discharge field of a plasma purification module has appeared. The plasma generated by high-voltage discharge promotes the decomposition of the peculiar smell molecules under the action of the catalyst, improves the retention time of the peculiar smell molecules and the decomposition speed of the peculiar smell molecules, and effectively increases the smell purification speed of the purification module. Meanwhile, the purification module is usually provided with a fan for active air circulation, so that the effect of odor purification and sterilization of the whole space in the refrigerator is realized conveniently.

In the existing ion purification module, because the curvature of the periphery of the high-voltage electrode is usually larger, abnormal discharge is easily formed to generate ozone, so that the concentration of the ozone is increased; the plasma is usually generated by asymmetric discharge from the wire electrode to the plate electrode, and the generation amount of the plasma is not enough, so that the speed of decomposing odor molecules is influenced; in addition, a large amount of heat can be generated when the high-voltage power supply operates, and the aging of the electric device can be accelerated after the heat is gathered to a certain degree, so that the service life is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a purification module which generates more plasma and generates less ozone.

The utility model further aims to solve the technical problem of providing a purification device, which has less ozone generation, more plasma generation and long service life of components.

The utility model further aims to solve the technical problem of providing the refrigerator which is good in smell purification effect and long in service life of the purification device.

In order to solve the above technical problems, an aspect of the present invention provides a purification module, including a plate electrode 1, a catalytic medium 2, and a wire electrode 3; the catalytic medium is arranged between the plate-shaped electrode and the wire electrode, and the peripheries of the plate-shaped electrode and the wire electrode are provided with insulating covered edges.

Preferably, the wire electrode is frame-shaped, the wire electrode comprises a frame, a discharge wire arranged between different sides of the frame and a discharge needle arranged inside the frame, and the insulating wrapping edge is arranged on the outer side of the frame. In the preferred technical scheme, the discharge wires arranged between different sides of the frame can form asymmetric discharge on the plate-shaped electrode in a larger range, the range of generating plasma is wider, and the decomposition of odor molecules can be formed in a larger area; the asymmetric discharge to the sheet electrode that sets up the formation of the discharge needle of frame inboard, the effect of discharging is better, and the concentration of the plasma that produces is higher, also better to the decomposition effect of peculiar smell molecule.

Further preferably, the number of the discharge wires is several, the several discharge wires are arranged in parallel on the opposite sides of the frame, the discharge needles are arranged in pairs on the frame between the discharge wires, and the needle points are arranged oppositely. In the preferred technical scheme, a plurality of discharge wires which are arranged on the opposite sides of the frame of the wire electrode in parallel have longer length, wider distribution range and more uniform distribution, and can generate plasmas with wider distribution range and more uniform distribution; the discharge needles arranged in pairs between the discharge wires on the frame of the wire electrode can generate larger discharge amount at a far point to generate a plurality of high-concentration plasma regions, so that the high-concentration plasma can be conveniently diffused, and the decomposition effect of odor molecules is improved.

Preferably, the catalytic media is a porous structure formed by coating the surface of a porous ceramic block with a noble metal catalyst. Through the preferable technical scheme, the noble metal catalyst can better improve the decomposition effect of the plasma on the peculiar smell molecules. And the surface area of the catalytic medium with the porous structure is larger, so that the coating amount of the noble metal catalyst and the contact area of the peculiar smell molecules and the noble metal catalyst can be improved.

As a preferred scheme, the outer sides of the plate-shaped electrode and the wire-shaped electrode are both provided with limiting clamping grooves. In this preferred technical scheme, the position of plate electrode and filar electrode can be fixed in the setting of spacing draw-in groove, ensures the interval between plate electrode and the filar electrode, improves the stability of the distance between plate electrode and the filar electrode to guarantee the production effect of plasma.

Preferably, there are two wire electrodes, and the two wire electrodes are respectively arranged on two sides of the plate-shaped electrode; the two catalytic media are respectively arranged on two sides of the plate-shaped electrode and between the plate-shaped electrode and the wire electrode. According to the preferable technical scheme, the two wire electrodes can respectively discharge to the plate electrode through one catalytic medium to generate plasma, and the generation amount of the plasma is larger. When the gas with the peculiar smell molecules passes through the purification module, the contact between the peculiar smell molecules and the catalytic medium is wider, and the decomposition effect on the peculiar smell molecules is better.

The second aspect of the utility model provides a purification device, which comprises a power module, a fan, a shell and the purification module provided by the first aspect of the utility model; the air purifier is characterized in that an air inlet and an air outlet are formed in the shell, the power module, the fan and the purification module are installed in the shell, the fan is electrically connected with a low-voltage output port of the power module, and the purification module is electrically connected with a high-voltage output port of the power module.

Preferably, the power supply module and the electrical connection points between the fan and the purification module are sealed by insulating materials. Through the preferred technical scheme, the output voltage of the power supply module can be ensured to be transmitted in an insulating environment, and the voltage on the connecting circuit is prevented from discharging other circuits or shells in a humid environment, so that ozone is generated and the output voltage of the power supply module is reduced.

Preferably, the casing includes lower cover and upper cover, power module, purification module and fan are installed in proper order in the lower cover, the air outlet sets up the lower cover is close to the one end of fan, the air intake sets up on the upper cover with power module relative position. In the preferred technical scheme, the fan drives air to enter the shell from the air inlet, and the air is discharged out of the shell from the air outlet after passing through the purification module. On the one hand, the circulation purification of the outside air of the shell is formed, on the other hand, the heat generated by the power module is taken away by the air flow from the power module at the air inlet, the cooling effect on the power module is formed, the temperature of the power module is prevented from rising, the reliability of the power module is improved, and the service life of the power module is prolonged.

Further preferably, the purification module comprises two catalytic media and two wire electrodes, the two wire electrodes are respectively arranged at two sides of the plate electrode, and the two catalytic media are respectively arranged between one wire electrode and the plate electrode; the plate-shaped electrode is electrically connected with the grounding output of the high-voltage output port of the power module, and the two wire-shaped electrodes are respectively and electrically connected with the two reverse high-voltage outputs of the high-voltage output port of the power module. Through the preferred technical scheme, when the airflow flows through the purification module under the driving of the fan, the airflow flows through the high-voltage ion field formed between the two wire electrodes and the plate electrode in sequence and contacts with plasma and a catalytic medium in the high-voltage ion field, and the decomposition effect of odor molecules in the airflow is better.

The third aspect of the present invention provides a refrigerator in which the purification apparatus provided by the second aspect of the present invention is used.

According to the technical scheme, the periphery of the plate-shaped electrode and the periphery of the wire electrode are provided with the insulating wrapping edges, the peripheral parts of the plate-shaped electrode and the wire electrode are wrapped in the insulating material, and the phenomenon that the part with larger edge curvature of the plate-shaped electrode and the wire electrode generates point discharge on other circuits or shells under the action of high voltage is prevented, so that ozone is generated, the concentration of ozone in the purification module is not controllable, the high-voltage output of the power supply module is reduced, and the generation effect of plasma is influenced. The structure for placing the electric wire and the discharge needle is simultaneously arranged on the wire electrode, so that the point discharge with better discharge effect can be formed while the large-range discharge is formed between the wire electrode and the plate electrode, and the plasma generation amount and the plasma concentration in the gas are improved. The arrangement that the two catalytic media are arranged in the two-stage high-voltage ion field formed by the two wire electrodes and the plate electrode improves the generation amount of plasma and the contact range of peculiar smell molecules with the plasma and the catalytic media, and improves the peculiar smell purification effect. The purification device has the technical effects, and meanwhile, the power supply module is arranged at the air inlet, so that the heat dissipation effect of the power supply module is good, the temperature rise caused by the heat generated by the work of the power supply module can be prevented, the reliability of the power supply module is improved, and the service life of the power supply module is prolonged; the purification modules of the two catalytic media and the two wire electrodes are used, so that air passing through the purification device can pass through the two high-voltage ion fields in a single circulation mode, the contact time of odor molecules with the catalytic media and plasma is prolonged, and the effect of removing the odor molecules in the circulating air is better. The refrigerator provided by the utility model adopts the purification device, the ozone generation amount is small, the peculiar smell purification effect is good, and the service life of the purification device is long.

Other technical features and advantages of the present invention will be further described in the following detailed description.

Drawings

FIG. 1 is a schematic view of a plate electrode in one embodiment of a purification module of the present invention;

FIG. 2 is a schematic illustration of a catalytic media in one embodiment of a purification module of the present invention;

FIG. 3 is a schematic representation of a wire electrode in one embodiment of a purification module of the present invention;

fig. 4 is a schematic structural view of one embodiment of the purification apparatus of the present invention.

Description of the reference numerals

1 plate electrode 11 air vent

12 plate electrode wiring card slot 2 catalytic medium

21 ventilation hole 3 wire electrode

31 discharge wire 32 discharge needle

33 clamping groove for wiring of 34-shaped wire electrode on frame

4 insulating 5 spacing draw-in grooves of borduring

6 power module 7 blower

8 lower cover of shell 81

82 upper cover

Detailed Description

In the present invention, unless otherwise specified, the use of the directional terms such as "upper" and "lower" indicate orientations or positional relationships that are based on the orientation or positional relationship shown in the drawings of the described device or component.

In the description of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "mounted" and "connected" are to be interpreted broadly, for example, the term "connected" may be a fixed connection, a detachable connection, or an integral connection; either directly or indirectly through intervening media, either internally or in any combination thereof. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The following detailed description of the present invention is provided in conjunction with the accompanying drawings, and it is to be understood that the detailed description is provided for purposes of illustration and explanation and is not intended to limit the scope of the utility model.

As shown in fig. 1, one embodiment of the purification module of the present invention comprises plate electrodes 1, catalytic media 2 and wire electrodes 3. The plate-shaped electrode 1 can be made of stainless steel, aluminum alloy or other metal plates with good conductivity, and the surface of the plate-shaped electrode is provided with a plurality of ventilation holes 11, so that airflow can pass through the ventilation holes 11 and pass through the plate-shaped electrode 1. The wire electrode 3 can also be made of stainless steel, aluminum alloy or other metal materials with better conductivity, and the wire electrode 3 is provided with a wire-shaped or strip-shaped discharge electrode so as to generate asymmetric discharge with the plate-shaped electrode 1 under the action of high voltage and generate plasma capable of decomposing peculiar smell molecules. The catalytic medium 2 is arranged between the plate-shaped electrode 1 and the wire-shaped electrode 3, the surface of the catalytic medium is provided with a catalyst capable of promoting the decomposition of the peculiar smell molecules, and the plasma contacts the peculiar smell molecules on the surface of the catalytic medium 2, so that the decomposition speed of the peculiar smell molecules can be accelerated under the action of the catalyst. The catalyst on the catalytic medium 2 may be copper manganese oxide or noble metal catalyst. The plate-shaped electrode 1 and the wire electrode 3 are provided with insulating covering edges 4 at their peripheries, and the insulating covering edges 4 are usually formed by using a plastic material, and may be formed by using a material such as insulating rubber or insulating silica gel. The insulating covering edge 4 covers the peripheral parts of the plate-shaped electrode 1 and the wire electrode 3, and the covering depth is 0.5-3 mm. The insulating covering edge 4 covers the plate-like electrode 1 and the wire electrode 3 with a portion having a large curvature in the peripheral portion thereof, and can prevent the portion having a large curvature from generating a point discharge in a humid atmosphere and generating a strongly oxidizing ozone gas. In addition, the abnormal discharge of the electrode also causes the output voltage of the high-voltage power supply providing high voltage for the purification module to drop, thereby affecting the generation effect of the plasma.

In some embodiments of the purification module of the present invention, as shown in fig. 3, the wire electrode 3 is a frame-shaped structure, the periphery of the wire electrode 3 is a closed frame 33, and the insulating covering 4 is disposed outside the frame 33 of the wire electrode 3, so as to cover the outside of the frame 33 inside the insulating covering 4. The discharge wires 31 are provided between different sides of the frame 33, and a plurality of discharge wires 31 may be provided, and the plurality of discharge wires 31 are electrically connected to the wire electrode 3, so that a large-scale asymmetric discharge can be formed between the discharge wires and the plate electrode 1 under the action of a high voltage, and plasma can be generated in a larger range. The discharge needles 32 are arranged inside the frame 33, a plurality of discharge needles 32 can be arranged, the plurality of discharge needles 32 are electrically connected with the wire electrode 3, high-intensity asymmetric discharge can be formed between the discharge needles and the plate electrode 1 under the action of high voltage, more plasmas can be generated, and the concentration of the plasmas in the area is improved.

As one embodiment of the purification module of the present invention, as shown in fig. 3, the wire electrode 3 may be formed in a rectangular shape, the frame 33 around the wire electrode 3 may also be formed in a rectangular shape, and a plurality of discharge wires 31 may be provided on a pair of opposite sides of the frame 33. The plurality of discharge wires 31 are arranged in parallel on the inner sides of a group of opposite sides of the frame 33, and the plurality of discharge wires 31 are uniformly distributed in the frame 33, so that the discharge between the discharge wires 31 and the plate-shaped electrode 1 is more uniform. The discharge needles 32 are arranged in pairs on a set of opposite sides of the frame 33 where the discharge filaments 31 are located, and can be generally arranged inside the frame 33 between two adjacent discharge filaments 31, and the tips of the discharge needles 32 are arranged opposite to each other, so that the distribution of efficient discharge points of the discharge needles 32 formed in the range of the frame 33 of the wire electrode 3 is more reasonable. Of course, the wire electrode 3 may be formed in various reasonable shapes such as a square, a prism, an oval, etc., and the plate-shaped electrode 1 and the catalytic medium 2 are generally formed in the same shape as the wire electrode 3.

As one embodiment of the purification module of the present invention, as shown in fig. 2, the catalytic media 2 is a porous structure formed by coating the surface of the porous ceramic block skeleton with a noble metal catalyst. Generally, the thickness of the catalytic medium 2 is set to be 5-20mm, a plurality of ventilation holes 21 with the equivalent diameter of 1-5mm are arranged on the catalytic medium 2, the ventilation holes 21 penetrate through the thickness direction of the catalytic medium, and the thickness of the inner wall between the ventilation holes 21 is 0.3 mm-3 mm. The cross-sectional shape of the ventilation holes 21 may be circular, square, polygonal, and other possible shapes, which is not limited by the utility model. The arrangement of the ventilation holes 21 can improve the surface area of the framework on one hand, so that the noble metal catalyst has larger contact area with air, and more peculiar smell molecules mixed in the air are catalytically decomposed; on the other hand, the plate-shaped electrode 1 and the wire electrode 3 can generate discharge in a larger range along the surface of the porous structure, and the generated plasma is also distributed along the surface of the porous structure, so that the effect of decomposing odor molecules is better generated under the catalytic action of the noble metal catalyst. Of course, a porous catalyst skeleton may be formed by molding a material such as clay and sintering the molded material. The noble metal catalyst is usually a catalyst with oxides of metals such as titanium, silver, platinum and the like as main components, and the catalytic medium 2 is usually obtained by coating the surface of a porous framework with nanoscale noble metal oxides and calcining at high temperature.

In some embodiments of the purification module of the present invention, as shown in fig. 1 and 3, the plate-shaped electrode 1 and the wire-shaped electrode 3 are provided with a position-limiting slot 5 at the outer side. The limiting clamping groove 5 can be directly formed by the material of the insulating wrapping edge 4, and can also be formed by wrapping the insulating wrapping edge 4 outside the electrode material. The limiting clamping groove 5 can facilitate the installation and positioning of the plate electrode 1 and the wire electrode 3, so that a set distance is formed between the plate electrode 1 and the wire electrode 3, the stability of the distance is kept, and the discharge amount and the plasma generation effect between the plate electrode 1 and the wire electrode 3 are ensured.

In some embodiments of the purification module according to the utility model, there are two wire electrodes 3, two wire electrodes 3 being arranged on each side of the plate-like electrode 1 and three electrodes being arranged parallel to each other. There are also two catalytic media 2, two catalytic media 2 are disposed on two sides of the plate electrode 1, each positioned between the plate electrode 1 and one wire electrode 3, and the direction of the ventilation holes on the catalytic media 2 is kept pointing to the electrodes on two sides respectively.

One embodiment of the purification apparatus of the present invention is shown in fig. 4, and includes a power module 6, a blower 7, a housing 8, and a purification module according to any embodiment of the present invention. The power module 6, the blower 7 and the purification module are all installed in the housing 8, and the housing 8 is provided with an air inlet 83 and an air outlet (not shown in the figure). The low-voltage output port of the power module 6 is electrically connected with the fan 7 and can provide low-voltage power supply required by the operation of the fan 7. When the fan 7 works, air can be driven to enter the shell 8 from the air inlet 83, and the air flows through the purification module and then is discharged out of the shell 8 from the air outlet. And a high-voltage output port of the power supply module 6 is electrically connected with the purification module so as to provide a high-frequency alternating current power supply required by the operation of the purification module. Specifically, two output points of the high-voltage output port of the power module 6 are connected to the plate-shaped electrode wiring card slot 12 on the plate-shaped electrode 1 and the wire-shaped electrode wiring card slot 34 on the wire-shaped electrode 3, respectively, by wires. The peak voltage of the high-frequency alternating current power supply is 1-5KV, and high-voltage discharge can be formed between the plate-shaped electrode 1 and the wire electrode 3, so that air is ionized to generate plasma. The inner wall of the shell 8 can be provided with an electrode potential groove to facilitate the installation and positioning of the plate-shaped electrode 1 and the wire electrode 3 in the shell 8. The air is driven by the fan 7 to continuously circulate through the purification module, and the odor molecules in the air are rapidly decomposed on the surface of the catalytic medium 2 under the action of the plasma, so that the odor in the air is removed.

In some embodiments of the purification apparatus of the present invention, the electrical connection point between the power module 6 and the blower 7 and the wire connection point between the power module 6 and the purification module are sealed with an insulating material. The insulating material can use any suitable insulating glue that can also seal a certain length of the end of the electrical connection line, even the entire electrical connection line. The use of the sealant can prevent the electric discharge between the electric connection points or between the electric connection points and the shell from generating ozone.

In some embodiments of the purification apparatus of the present invention, as shown in fig. 4, the housing 8 includes a lower cover 81 and an upper cover 82. The power module 6, the purification module and the fan 7 are sequentially installed in the lower cover 81, an air outlet is formed in one end, close to the fan 7, of the lower cover 81, and an air inlet 83 is formed in the position, opposite to the power module 6, of the upper cover 82. When the fan 7 works, air entering from the air inlet 83 firstly flows through the power module 6 and takes away heat generated by the work of the power module 6, so that the working temperature of the power module 6 is reduced, the power module 6 works at a lower temperature all the time, and the working stability and the service life of the power module 6 are improved.

As an embodiment of the purification apparatus of the present invention, the purification module comprises two catalytic media 2 and two wire electrodes 3, as illustrated in fig. 4. Two wire electrodes 3 are respectively arranged on both sides of the plate-shaped electrode 1, and two catalytic media 2 are each arranged between one wire electrode 3 and the plate-shaped electrode 1. When air flows through the purification device under the driving of the fan 7, the air passes through two high-voltage ion fields formed by the discharge of the wire electrodes 3 and the plate electrodes 1 and contacts with the catalytic medium 2 twice, so that the decomposition of odor molecules in the air is more thorough, the decomposition efficiency of the odor molecules and the odor purification effect are improved, and the volume of the purification device can be reduced. The grounding output point of the high-voltage output port of the power module 6 is electrically connected to the plate electrode wiring clamping groove 12 on the plate electrode 1, and the two reverse high-voltage output points of the high-voltage output port of the power module 6 are respectively electrically connected to the wire electrode wiring clamping grooves 34 on the two wire electrodes 3, so that opposite voltages are formed on the wire electrodes 3 on the two sides of the plate electrode 1, and a voltage value which is 2 times that of the input voltage is formed in the purification module, thereby forming a high-voltage ion field with higher voltage.

According to the technical scheme, the insulating covered edge 4 is arranged on the peripheries of the plate-shaped electrode 1 and the wire-shaped electrode 3, so that the condition that the part with larger curvature of the peripheries of the plate-shaped electrode 1 and the wire-shaped electrode 3 generates high-voltage discharge to other electric conductors or shells to generate ozone under a humid environment can be prevented, and the concentration of the ozone in the purification module is unreliable. Be provided with discharge wire 31 and discharge needle 32 simultaneously on filar electrode 3, when guaranteeing the relatively large range even discharge in the purification module, still increased the effect of discharging through discharge needle 32's point discharge, the concentration of the plasma of production is higher, has improved peculiar smell purification effect. According to the purification device, the power module 6 is arranged at the air inlet 83, heat generated by the power module 6 during working is taken away by circulating air flow formed by the fan 7, the working temperature of the power module 6 is reduced, the reliability of the power module 6 is improved, and the service life of the power module 6 is prolonged. The double-layer plasma purification structure formed by the plate-shaped electrode 1, the two catalytic media 2 and the two wire-shaped electrodes 3 prolongs the total retention time of the peculiar smell molecules in the reaction medium, has better decomposition effect on the peculiar smell molecules, improves the clearance rate of the peculiar smell molecules and has better peculiar smell purification effect. The purification device can be arranged in the air duct of the refrigerator for circulating odor purification and sterilization, and can also be arranged in other places of the refrigerator, such as a drawer and a fruit and vegetable box, so that the arrangement is more flexible.

The refrigerator provided by the utility model uses the purification device of the utility model and also has the advantages.

In the description of the present invention, reference to the description of "one embodiment," "some embodiments," "a specific implementation," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In the present disclosure, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Within the scope of the technical idea of the utility model, simple modifications may be made to the technical solution of the utility model, including combinations of the individual specific technical features in any suitable manner. Such simple modifications and combinations should be considered within the scope of the present disclosure as well.

Claims (11)

1. A purification module, characterized by comprising a plate-like electrode (1), a catalytic medium (2) and a wire-like electrode (3); the catalytic medium (2) is arranged between the plate-shaped electrode (1) and the wire electrode (3), and the peripheries of the plate-shaped electrode (1) and the wire electrode (3) are provided with insulating covered edges (4).

2. Purification module according to claim 1, wherein the wire electrode (3) is frame-shaped, the wire electrode (3) comprising a frame (33), a discharge wire (31) arranged between different sides of the frame (33) and a discharge needle (32) arranged inside the frame (33), the insulating border (4) being arranged at an outer portion of the frame (33).

3. The purification module according to claim 2, wherein the discharge wires (31) are provided in a plurality of numbers, the plurality of discharge wires (31) are arranged in parallel on opposite sides of the frame (33), the discharge needles (32) are arranged in pairs on the frame (33) between the discharge wires (31), and the tips of the discharge needles are arranged opposite to each other.

4. The purification module according to claim 1, wherein the catalytic media (2) is a porous structure formed by coating the surface of a porous ceramic block with a noble metal catalyst.

5. Purification module according to any one of claims 1 to 4, wherein the plate-like electrode (1) and the wire-like electrode (3) are provided with a limiting slot (5) on the outside.

6. Purification module according to any one of claims 1 to 4, wherein there are two of said filiform electrodes (3), two of said filiform electrodes (3) being arranged on either side of said plate-shaped electrode (1); the number of the catalytic mediums (2) is two, and the two catalytic mediums (2) are arranged on two sides of the plate-shaped electrode (1) and are positioned between the plate-shaped electrode (1) and the wire-shaped electrode (3).

7. Purification device, characterized in that it comprises a power module (6), a fan (7), a housing (8) and a purification module according to any one of claims 1 to 6; be provided with air intake (81) and air outlet on casing (8), power module (6), fan (7) and purification module are all installed in casing (8), fan (7) with the low pressure output port electricity of power module (6) is connected, purify the module with the high pressure output port electricity of power module (6) is connected.

8. Purification device according to claim 7, wherein the electrical connection points between the power module (6) and the fan (7) and purification module are sealed with an insulating material.

9. The purification apparatus according to claim 7, wherein the housing (8) comprises a lower cover (81) and an upper cover (82), the power module (6), the purification module and the fan (7) are sequentially mounted in the lower cover (81), the air outlet is provided at an end of the lower cover (81) adjacent to the fan (7), and the air inlet (83) is provided at a position on the upper cover (82) opposite to the power module (6).

10. Purification device according to claim 9, wherein the purification module comprises two of said catalytic media (2) and two of said wire electrodes (3), the two wire electrodes (3) being respectively arranged on both sides of the plate electrode (1), the two catalytic media (2) being respectively arranged between one of said wire electrodes (3) and the plate electrode (1); the plate-shaped electrode (1) is electrically connected with the grounding output of the high-voltage output port of the power module (6), and the two wire electrodes (3) are respectively and electrically connected with the two reverse high-voltage outputs of the high-voltage output port of the power module (6).

11. A refrigerator characterized by comprising the purification apparatus as claimed in any one of claims 7 to 10.

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