Negative ion generating device and range hood with same

Abstract

The utility model discloses a negative ion generating device and a range hood with the negative ion generating device, the negative ion generating device comprises a cyclone assembly, the cyclone assembly comprises a cyclone engine lower cover and a fan, the fan is arranged on the cyclone engine lower cover, and the fan sucks air and exhausts air downwards through the cyclone engine lower cover; the negative ion generating device is arranged in the exhaust direction of the cyclone assembly; compared with the prior art, the negative ion generating device is provided with the cyclone assembly and the negative ion generating device is arranged in the air exhaust direction of the cyclone assembly, and when the cyclone assembly works, if the negative ion generating device is started, the negative ion generating device can be started; a large number of anions gathered by an accessory at the transmitting end of the anion generating device flow downwards under the action of airflow conveyed to the lower portion of the lower cover of the cyclone engine by the cyclone assembly, the downward diffusion distance is larger than the diffusion distance generated by the anions only depending on the anions, and the purification range is enlarged; when the negative ions flow through the corresponding positions of the mouth and nose of the user, air in the corresponding range can be purified, and the user is prevented from inhaling lampblack.

Description

Technical Field

[0001] The utility model relates to the technical field of range hoods, and in particular to a negative ion generating device and a range hood having the same. Background Art

[0002] When users are cooking, a lot of oil smoke will be generated. When the range hood is started, the exhaust fan of the range hood forms a negative pressure at the air intake port. The oil smoke generated by cooking flows toward the air intake port of the range hood under the action of the negative pressure, and enters the air collecting box of the range hood through the air intake port of the range hood, and then is discharged outdoors. In the process of the oil smoke flowing toward the air intake port, part of the air flow surface formed by the oil smoke will escape outward and be inhaled by the user. Long-term inhalation of oil smoke will affect the health of the user. For this reason, there are A range hood with an air curtain. When the range hood is in operation, the main body of the range hood discharges air curtain wind downwards between the user and the stove. The air curtain formed by the air curtain wind can, to a certain extent, block the escape of oil fume. However, when the escaped oil fume passes through the air curtain and is blocked by the air curtain, it will mix into the air curtain and flow downwards with the air curtain, causing the air curtain wind to be contaminated by the oil fume. If the user disturbs the air curtain by walking or stir-frying during cooking, the air curtain wind contaminated by the oil fume will also escape to the user's mouth and nose and be inhaled by the user. Utility Model Content

[0003] The purpose of the utility model is to provide a negative ion generating device and a range hood having the same, which are used to solve the above-mentioned technical problems.

[0004] A negative ion generating device, used in a range hood, comprising:

[0005] The cyclone assembly comprises a cyclone engine lower cover and a fan, wherein the fan is arranged on the cyclone engine lower cover, and the fan sucks air and exhausts air downward through the cyclone engine lower cover;

[0006] The negative ion generating device is arranged in the exhaust direction of the cyclone component.

[0007] According to one embodiment of the utility model, the emission end of the negative ion generating device extends downward to below the lower cover of the cyclone engine.

[0008] According to one embodiment of the utility model, the distance that the emission end of the negative ion generating device extends downward from the lower surface of the lower cover of the cyclone engine is x, and the head diameter of the emission end of the negative ion generating device is D1, and x≥D1.

[0009] According to one embodiment of the utility model, a accommodating groove with an opening facing downward is provided on the lower cover of the cyclone engine, and a negative ion generating device is placed in the accommodating groove, and an emitting end of the negative ion generating device extends downward to below the lower cover of the cyclone engine.

[0010] According to one embodiment of the present invention, the head diameter of the emission end of the negative ion generating device is D1, the lower edge diameter of the receiving groove is D2, D2≥5mm>D1, 2mm<D1<5mm.

[0011] According to one embodiment of the utility model, at least one vent hole is opened on the top of the accommodating groove, the diameter of the lower edge of the accommodating groove is D2, D2≥5mm>D1, 2mm<D1<5mm, and the diameter of the vent hole is D3, 1mm≤D3≤(D2-D1) / 2.

[0012] According to one embodiment of the utility model, the containing tanks are arranged around the negative ion generating device array.

[0013] According to one embodiment of the utility model, a wind curtain exhaust port is provided on the lower cover of the cyclone engine, and the fan sucks air and exhausts air downward through the wind curtain exhaust port.

[0014] A range hood adopts the above-mentioned negative ion generating device, which includes a range hood body, the range hood body having a cover plate, a top plate and an installation cavity located between the cover plate and the top plate, the negative ion generating device is arranged in the installation cavity, the cover plate is provided with a wind curtain suction port corresponding to the fan, the cyclone engine lower cover is installed on the top plate, and the top plate is provided with an avoidance port corresponding to the cyclone engine lower cover.

[0015] According to one embodiment of the utility model, two groups of negative ion generating devices are arranged in the installation cavity, and the lower covers of the cyclone engines of the two groups of negative ion generating devices are arranged along the width direction of the top plate.

[0016] Compared with the prior art, the negative ion generating device of the utility model has the following advantages:

[0017] The negative ion generating device of the utility model is provided with a cyclone component and the negative ion generating device is arranged in the exhaust direction of the cyclone component, so that when the cyclone component is working, if the negative ion generating device is turned on, a large number of negative ions gathered in the emission end attachment of the negative ion generating device will flow downward under the action of the airflow transported by the cyclone component to the bottom of the lower cover of the cyclone engine, and the downward diffusion distance is greater than the distance that can be diffused when it is emitted by itself, and the purification range is expanded; when the negative ions flow through the corresponding positions of the user's mouth and nose, the air in the corresponding range can be purified to prevent the user from inhaling oil smoke. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a front view of the negative ion generating device of the utility model;

[0019] Figure 2 It is a bottom view of the negative ion generating device of the utility model;

[0020] Figure 3 It is an exploded view of the negative ion generating device of the utility model;

[0021] Figure 4 for Figure 3 Exploded view of the negative ion generating device;

[0022] Figure 5 It is a front view of a range hood having a negative ion generating device of the utility model;

[0023] Figure 6 for Figure 5 Sectional view in the AA direction;

[0024] Figure 7 for Figure 6 A magnified view of middle;

[0025] Figure 8 The exploded view of a range hood having the negative ion generating device of the utility model;

[0026] In the figure: 1. cyclone assembly, 11. cyclone engine lower cover, 111. accommodating tank, 112. vent, 113. wind curtain exhaust port, 12. fan, 2. negative ion generator, 21. carbon fiber head, 22. metal cladding, 23. wire, 3. range hood body, 31. cover plate, 311. wind curtain air intake port, 32. top plate.

[0027] The realization of the functions and advantages of the utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0028] The following will disclose multiple embodiments of the present invention with drawings. For the purpose of clear description, many practical details will be described together in the following description. However, it should be understood that these practical details should not be used to limit the present invention. In other words, in some embodiments of the present invention, these practical details are not necessary. In addition, in order to simplify the drawings, some conventional structures and components will be depicted in a simple schematic manner in the drawings.

[0029] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0030] In addition, in the present utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present utility model. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0031] In order to further understand the content, features and effects of the present invention, the following embodiments are given as examples and described in detail with reference to the accompanying drawings:

[0032] See also Figures 1 to 4The utility model discloses a negative ion generating device. The negative ion generating device disclosed in the utility model is used for a range hood, and comprises a cyclone component 1 and a negative ion generating device 2. The cyclone component 1 comprises a cyclone engine lower cover 11 and a fan 12. The fan 12 is arranged on the cyclone engine lower cover 11. The fan 12 sucks air and exhausts air downward through the cyclone engine lower cover 11. The negative ion generating device 2 is arranged in the exhaust direction of the cyclone component 1. When the negative ion generating device of the utility model is applied to the range hood, the cyclone component 1 can generate wind curtain wind. When the cyclone component 1 is working, the fan 12 is started, the air inlet side of the fan 12 sucks air, and the exhaust side of the fan 12 exhausts air. The exhaust air of the fan 12 passes through one side of the cyclone engine lower cover 11 and the other side of the cyclone engine lower cover 11 and is discharged downward. The downwardly discharged airflow forms a wind curtain. The wind curtain is located between the user and the stove, and is used to prevent the oil smoke generated by the user when cooking from escaping to the user side, so as to prevent the user from inhaling the escaped oil smoke; when the negative ion generating device 2 is working, the emitting end of the negative ion generating device 2 discharges and ionizes the surrounding air to generate negative ions. The generated negative ions come into contact with pollutants in the air during the diffusion process, purify the pollutants in the air, and can play a role in purifying the air. If there is only a negative ion generating device 2, the diffusion distance of the negative ions emitted by the emitting end of the negative ion generating device 2 is limited, and it may not diffuse to the inhalation range corresponding to the user's mouth and nose, but may have interacted with the surrounding air and been consumed, and the effect of purifying the air in the inhalation range corresponding to the user's mouth and nose can not be achieved; therefore, the negative ion generating device of the utility model is provided with a cyclone component 1, and the negative ion generating device 2 is arranged in the exhaust direction of the cyclone component 1, so that when the cyclone component 1 is working, if the negative ion generating device 2 is turned on, a large number of negative ions gathered around the emitting end of the negative ion generating device 2 will flow downward under the action of the airflow transported by the cyclone component 1 to the bottom of the cyclone engine lower cover 11, and the downward diffusion distance is greater than the distance that can be diffused when it is emitted by itself, and the purification range is expanded; when the negative ions flow through the corresponding position of the user's mouth and nose, the air in the corresponding range can be purified to prevent the user from inhaling oil smoke.

[0033] The negative ion generating device of the utility model, when applied to the range hood, has multiple matching modes between the negative ion generating device 2 and the cyclone component 1. When the range hood has a smoke sensor, the cyclone component 1 and the negative ion generating device 2 can be linked with the smoke sensor. When the user is cooking, the cyclone component 1 and the negative ion generating device 2 are both started, the cyclone component 1 can exhaust air downward and generate a wind curtain to block the fumes generated by cooking from escaping outward, and the negative ions generated by the negative ion generating device 2 are driven downward by the wind curtain wind when the wind curtain wind flows through, and the negative ions flow downward with the wind curtain wind, and the downward diffusion distance becomes larger, and can flow through the corresponding inhalation range of the user's mouth and nose, purify the air at the corresponding position, and prevent the user from inhaling the escaped fumes, and when flowing downward with the wind curtain wind, they will also diffuse in the left and right directions in the wind curtain wind, purify the fumes mixed in the wind curtain wind, and provide the user with a healthy cooking environment. When the user finishes cooking, the smoke exhaust fan of the range hood is turned off, the cyclone component 1 and the negative ion generator 2 are turned off, and the smoke sensor is started to monitor the backflow of oil smoke. The detection value of the smoke sensor is a range, and the detection range is set to ab, where a<c<b. The smoke sensor detects the oil smoke in the flue in real time when the smoke exhaust fan is turned off, and sends a signal to the control system of the range hood. When the smoke sensor detects that the oil smoke concentration is greater than a and less than c, the control system of the range hood starts the negative ion generator 2. After the backflow of oil smoke escapes through the air intake port of the range hood, it will be purified by the negative ions produced by the negative ion generator 2, which can make the kitchen air clean; when the smoke sensor detects that the concentration of oil smoke is greater than c and less than b, The control system of the range hood starts the cyclone component 1 and the negative ion generating device 2. The cyclone component 1 exhausts air downward to form a wind curtain to prevent the backflow of oil smoke from escaping outward. The negative ion generating device 2 generates negative ions, which flow downward with the wind curtain wind and diffuse in the wind curtain wind to purify the oil smoke flowing through the wind curtain. When the smoke sensor detects that the oil smoke concentration is greater than b, the control system of the range hood starts the smoke exhaust fan of the range hood and turns off the cyclone component 1 and the negative ion generating device 2. The smoke exhaust fan works and sucks the air in the environment to discharge the backflow of oil smoke from the environment.

[0034] See also Figures 1 to 3In the negative ion generating device of the present invention, the emission end of the negative ion generating device 2 extends downward to below the lower cover 11 of the cyclone engine. First, the emitting end of the negative ion generating device 2 extends downward from the bottom of the cyclone engine lower cover 11, so that the negative ion generating device 2 is as close as possible to the inhalation range corresponding to the user's mouth and nose, so that when the negative ions are blown downward by the wind curtain wind generated by the cyclone component 1 and flow downward, they can quickly reach the inhalation range corresponding to the user's mouth and nose, and the negative ions are consumed less, which can improve the purification effect of the air in the inhalation range corresponding to the user's mouth and nose; secondly, if the emitting end of the negative ion generating device 2 is placed in the cyclone engine lower cover 11 or above the cyclone engine lower cover 11, in terms of distance, the distance from the negative ion generating device 2 to the inhalation range corresponding to the user's mouth and nose is increased, and the negative ions generated by the negative ion generating device 2 may be mostly consumed when flowing through the inhalation range corresponding to the user's mouth and nose, and the purification effect of the air in the inhalation range corresponding to the user's mouth and nose is weakened; in addition, if the emitting head of the negative ion generating device 2 does not pass through the cyclone engine lower cover 11, the air flow at the emitting head of the negative ion generating device 2 is not smooth, which affects the generation of negative ions.

[0035] Metal can make negative ions annihilate, affecting the purification effect of negative ions. In use, the cyclone engine lower cover 11 adopts plastic parts, which can reduce the elimination of negative ions.

[0036] See also Figure 4 The negative ion generating device of the utility model includes a carbon fiber head 21 and a metal cladding 22. The metal cladding 22 wraps one end of the carbon fiber head 21. The metal cladding 22 is connected to a high-voltage package through a wire 23, and the high-voltage package is connected to the circuit board of the range hood. When the negative ion generating device 2 is required to generate negative ions, the circuit board connects the high-voltage package to the circuit, and the current of the high-voltage package is transmitted to the metal cladding 22 through the wire 23. The current transmitted to the metal cladding 22 is transmitted along the metal cladding 22 and transmitted to the surface of the carbon fiber head 21, and then transmitted along the surface of the carbon fiber head 21 to the tip of the carbon fiber head 21. The tip of the carbon fiber head 21 discharges, ionizes the air and generates negative ions. The tip of the carbon fiber head 21 is one end away from the metal cladding 22, so that the negative ions generated by the discharge of the tip of the carbon fiber head 21 are not easily extinguished by the metal cladding 22.

[0037] In the negative ion generating device of the utility model, at least the tip of the carbon fiber head 21 is wrapped with PDG organic gel, and the hydrophilic polymer chains and solvent molecules on the surface of the gel can effectively capture gaseous water molecules in the air, and then the water molecules are liquefied and further quickly conducted to the inside of the polymer gel network by the solvent molecules. Since the polymer gel can swell in a large size under the action of water, the volume hidden by itself can swell several times while still maintaining good strength, the water molecules adsorbed inside can be effectively bound to the inside by the polymer chain without obvious leakage and leakage, so the diluted polymer organic gel can effectively capture water molecules in the air and well accommodate and store water molecules. The polymer hygroscopic gel on the surface of the carbon fiber head 21 transfers the adsorbed water molecules to the surface of the carbon fiber head 21 through the hydrophilic effect of the surface of the carbon fiber head 21, and then transfers them to the top of the carbon fiber head 21 by using the water absorption and capillary action of the carbon fiber head 21, and enriches at the tip of the carbon fiber head 21, and then generates negative oxygen ions under voltage.

[0038] In the negative ion generating device of the utility model, the resistance at the metal cladding 22 is R1, the resistance of the metal cladding 22 connecting one end of the wire 23 to the tip of the carbon fiber head 21 is R2, the resistance at the wire 23 is R3, and the resistance of the metal cladding 22 connecting one end of the wire 23 to the middle of the carbon fiber head 21 is R4, then: R3<R1<R2<R4, 2Ω<R1<3.5Ω, 8Ω<R2<13Ω, 1Ω<R3<2Ω, 15Ω<R4<18Ω. The resistance at the carbon fiber head 21 is the smallest, and the voltage flowing therethrough is the largest. When the tip of the carbon fiber head 21 is discharged, more negative ions are generated by ionizing the air.

[0039] In the negative ion generating device of the utility model, the distance that the emitting end of the negative ion generating device 2 extends downward from the lower surface of the cyclone engine lower cover 11 is x, and the head diameter of the emitting end of the negative ion generating device 2 is D1, and x≥D1. The longer the emitting end of the negative ion generating device 2 extends to the lower surface of the cyclone engine lower cover 11, the smaller the distance from the user's mouth and nose to the corresponding inhalation range is, and the larger the effective contact area with the air, the more negative ions are generated, and the better the air purification effect is. However, the reality is that the distance that the negative ion generating device 2 extends downward from the lower surface of the cyclone engine lower cover 11 is as high as , which will affect the user's operation and the overall appearance of the range hood. Therefore, in the present embodiment, the emitting end of the negative ion generating device 2 is extended downward from the lower surface of the cyclone engine lower cover 11 by a distance greater than or equal to the head diameter of the emitting end of the negative ion generating device 2. In this way, the emitting end of the negative ion generating device 2 can be sufficiently distant from the cyclone engine lower cover 11 to reduce the consumption of negative ions by the cyclone engine lower cover 11. The emitting end of the negative ion generating device 2 can also be fully in contact with the air to generate a large amount of negative ions.

[0040] See also Figures 1 to 3 In the negative ion generating device of the utility model, a receiving groove 111 with an opening facing downward is provided on the lower cover 11 of the cyclone engine, and the negative ion generating device 2 is placed in the receiving groove, and the emission end of the negative ion generating device 2 extends downward to the bottom of the lower cover 11 of the cyclone engine. After the negative ion generating device 2 is powered on, when the portion of the carbon fiber head 21 of the negative ion generating device 2 extending out of the metal cladding 22 contacts the air, the air can be ionized and negative ions can be generated. The receiving groove 111 with an opening facing downward is provided on the lower cover 11 of the cyclone engine, and the portion of the carbon fiber head 21 of the negative ion generating device 2 placed in the receiving groove 111 will also contact the air in the receiving groove 111, ionize the air and generate negative ions, and the amount of negative ions generated can be increased.

[0041] In the negative ion generating device of the present invention, the head diameter of the emitting end of the negative ion generating device 2 is D1, and the lower edge diameter of the containing groove 111 is D2, where D2≥5mm>D1, and 2mm<D1<5mm. The lower edge diameter of the containing groove 111 is larger than the head diameter of the emitting end of the negative ion generating device 2, and the emitting end of the negative ion generating device 2 will not contact the wall surface of the containing groove 111. The larger the space of the containing groove 111 surrounding the negative ion generating device 2, the more negative ions are generated, and the less negative ions are eliminated when flowing out of the containing groove 111, so that the purification effect of the negative ions generated by the negative ion generating device 2 can be improved.

[0042] See also Figures 1 to 3In the negative ion generating device of the present invention, at least one vent hole 112 is provided on the top of the receiving tank 111, the diameter of the lower edge of the receiving tank 111 is D2, D2≥5mm>D1, 2mm<D1<5mm, and the diameter of the vent hole 112 is D3, 1mm≤D3≤1mm≤D3≤(D2-D1) / 2. When the cyclone assembly 1 is started, the fan 12 discharges air downward through the cyclone engine lower cover 11, and the air on the exhaust side of the fan 12 can enter the receiving tank 111 through the vent hole 112, blowing the negative ions in the receiving tank 111 and the negative ions at the emission end of the negative ion generating device 2 downward, thereby increasing the diffusion distance of the negative ions. Furthermore, the negative ion generating device 2 generates negative ions by discharging the tip of the carbon fiber head 21 of the negative ion generating device 2 to ionize the air, so that the air on the exhaust side of the fan 12 enters the receiving groove 111 through the vent 112, so that the carbon fiber head 21 in the receiving groove 111 partially ionizes the air and generates negative ions, thereby increasing the amount of negative ions generated. After the negative ions are generated, new air enters the receiving groove, and while being ionized by the carbon fiber head 21, the negative ions generated by the ionization are blown downward, so that the negative ions can move to the corresponding inhalation range of the user's mouth and nose, and purify the air in the range, so that the user has a healthy cooking environment. When the negative ion generating device 2 is installed in the receiving tank 111, the top of the receiving tank 111 has an installation channel, and the carbon fiber head 21 of the negative ion generating device 2 passes through the installation channel and is placed in the receiving tank 111, and the emission end extends from the receiving tank 111. At this time, the width of the ring around the installation channel is D2-D1, and the diameter D3 of the vent 112 must satisfy D3≤(D2-D1) / 2. When D3=(D2-D1) / 2, the vent 112 can form an installation channel, and the carbon fiber head 21 directly passes through the vent 112 into the receiving tank 111, and the emission end extends out of the receiving tank 111. When the direct D3 of the vent hole 112 is less than (D2-D1) / 2, the vent hole 112 is a hole arranged on a ring around the installation channel and connected to the receiving groove 111. The larger the aperture of the vent hole 112, the smaller the wind resistance when the air on the exhaust side of the fan 12 enters the receiving groove 111 through the vent hole 112, the smaller the speed of the air flow entering the receiving groove 111, and the smaller the distance that the air flow out of the receiving groove 111 blows the negative ions. The smaller the aperture of the vent hole 112, the faster the air on the exhaust side of the fan 12 enters the receiving groove through the vent hole 112. The greater the wind resistance at 111, the greater the speed of the air flow entering the receiving groove 111, and the greater the distance that the air flow out of the receiving groove 111 blows the negative ions. However, if the aperture of the vent 112 is too small, it will affect the amount of air entering the receiving groove 111 and generate noise. Therefore, in this embodiment, the aperture D3 of the vent 112 satisfies 1mm≤D3, which can not only ensure the amount of air entering the receiving groove 111, but also make the air entering the receiving groove 111 have sufficient wind speed to blow the negative ions to the corresponding inhalation range of the user's mouth and nose.

[0043] See also Figure 2 and Figure 3 In the negative ion generating device of the utility model, the receiving grooves 111 are arranged in an array around the negative ion generating device 2. When the fan 12 is started, the air on the exhaust side of the fan 12 enters the receiving groove 111 through the vent 112, and a plurality of air flows surrounding the carbon fiber head 21 are uniformly formed. The carbon fiber head 21 located in the receiving groove 111 partially ionizes the air entering the receiving groove 111 to generate negative ions. The generated negative ions flow downward with the air entering the receiving groove 111 and blow downward a large number of negative ions generated by the ionized air at the tip of the carbon fiber head 21.

[0044] See also Figure 2 and Figure 3 In the negative ion generating device of the utility model, a wind curtain exhaust port 113 is provided on the lower cover 11 of the cyclone engine, and the fan 12 sucks air and exhausts air downward through the wind curtain exhaust port 113. The fan of the utility model adopts a perfusion fan. When the cross-flow fan is started, the wind comes in from the blades, leaves the blades and blows toward the lower cover 11 of the cyclone engine, and then is discharged downward through the wind curtain exhaust port 113, forming a wind curtain arranged along the width direction of the lower cover 11 of the cyclone engine, and the cross-flow fan has low noise, and when the wind curtain is produced, the noise of the smoke machine operation will not be increased excessively.

[0045] See also Figure 2 and Figure 3 The wind curtain exhaust port 113 is composed of a plurality of strip air holes, the strip air holes include a first strip air hole and a second strip air hole, the length of the first strip air hole is greater than the length of the second strip air hole, the first strip air hole and the second strip air hole are alternately arranged in sequence to form a row of exhaust ducts, and the cyclone engine lower cover 11 has at least two rows of exhaust ducts, and the two rows of exhaust ducts are projected forward or backward to form a continuous line, so that the wind curtain formed downward maintains continuity in the width direction of the cyclone engine lower cover 11.

[0046] The negative ion generating device of the utility model is provided with a negative ion generating device 2 in the exhaust direction of the cyclone component 1. When the wind curtain generated by the cyclone component 1 is discharged downward, the negative ions generated by the negative ion generating device 2 can be blown downward, thereby increasing the diffusion distance of the negative ions. The negative ions generated by the negative ion generating device 2 can be effectively diffused to the inhalation range corresponding to the user's mouth and nose, thereby purifying the air in the corresponding range and providing the user with a healthy cooking environment.

[0047] See also Figures 5 to 8The utility model also provides a range hood, which adopts the above-mentioned negative ion generating device, including a range hood body 3, the range hood body 3 has a cover plate 31, a top plate 32 and an installation cavity between the cover plate 31 and the top plate 32, the negative ion generating device is arranged in the installation cavity, the cover plate 31 is provided with a wind curtain suction port 311 corresponding to the fan 12, the cyclone engine lower cover 11 is installed on the top plate 32, and the top plate 32 is provided with an avoidance port corresponding to the cyclone engine lower cover 11. When the user is cooking, the range hood is turned on and operated, and the cyclone component 1 and the negative ion generating device 2 are in operation. The fan 12 of the cyclone component 1 draws air through the wind curtain air intake port 311 and exhausts air downward through the cyclone engine lower cover 11. The wind is discharged downward from the wind curtain air exhaust port 113 on the cyclone engine lower cover 11 to form a wind curtain. The wind curtain can, to a certain extent, block the fumes produced by cooking from escaping outward when flowing toward the air intake port of the range hood, thereby reducing the possibility of users inhaling fumes. When the negative ion generating device 2 is in operation, the circuit board connects the high-voltage package to the circuit, and the current of the high-voltage package is transmitted to the metal cladding 22 through the wire 23. The current transmitted to the metal cladding 22 is transmitted along the metal cladding 22 and transmitted to the surface of the carbon fiber head 21, and then transmitted along the surface of the carbon fiber head 21 to the tip of the carbon fiber head 21. The tip of the carbon fiber head 21 discharges, ionizes the air and generates negative ions. During the process of generating negative ions, when the fan 12 sucks air through the air curtain suction port 311 and exhausts air downward through the cyclone engine lower cover 11, part of the air flow enters the receiving tank 111 through the vent 112, and then is discharged downward from the receiving tank 111, blowing the negative ions in the receiving tank 111 and the negative ions at the emission end of the negative ion generating device 2 downward, thereby increasing the diffusion distance of the negative ions. In addition, the negative ion generating device 2 generates negative ions by discharging the tip of the carbon fiber head 21 of the negative ion generating device 2 to ionize the air, so that the air on the exhaust side of the fan 12 enters the receiving tank 111 through the vent 112, so that the carbon fiber head 21 can partially ionize the air in the receiving tank 111 and generate negative ions, thereby increasing the amount of negative ions generated. After the negative ions are generated, new air enters the receiving tank, and while being ionized by the carbon fiber head 21, the negative ions generated by the ionization are blown downward, so that the negative ions can move to the corresponding inhalation range of the user's mouth and nose, and purify the air in the range, so that the user has a healthy cooking environment.

[0048] See also Figure 8 In the range hood of the utility model, two groups of negative ion generating devices are arranged in the installation cavity, and the cyclone engine lower covers 11 of the two groups of negative ion generating devices are arranged along the width direction of the top plate 32. When the range hood is running, the negative ion generating devices generate wind curtains on both sides of the range hood along the width direction of the range hood. The wind curtains contain negative ions, which diffuse downward with the wind of the wind curtains and purify the oil smoke mixed in the wind curtains, so that users have a healthy cooking environment.

[0049] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions or improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A negative ion generating device for a range hood, characterized in that: include: A cyclone assembly (1), comprising a cyclone engine lower cover (11) and a fan (12), wherein the fan (12) is arranged on the cyclone engine lower cover (11), and the fan (12) sucks air and discharges air downward through the cyclone engine lower cover (11); A negative ion generating device (2) is arranged in the exhaust direction of the cyclone component (1).

2. The negative ion generating device according to claim 1, characterized in that: The emission end of the negative ion generating device (2) extends downward to below the lower cover (11) of the cyclone engine.

3. The negative ion generating device according to claim 1, characterized in that: The distance that the emission end of the negative ion generating device (2) extends downward from the lower surface of the cyclone engine lower cover (11) is x, and the head diameter of the emission end of the negative ion generating device (2) is D1, and x≥D1.

4. The negative ion generating device according to claim 1, characterized in that: The cyclone engine lower cover (11) is provided with a receiving groove (111) with an opening facing downwards, the negative ion generating device (2) is placed in the receiving groove (111), and the emission end of the negative ion generating device (2) extends downwards to below the cyclone engine lower cover (11).

5. The negative ion generating device according to claim 4, characterized in that: The head diameter of the emission end of the negative ion generating device (2) is D1, the lower edge diameter of the containing groove (111) is D2, D2≥5mm>D1, 2mm<D1<5mm.

6. The negative ion generating device according to claim 4, characterized in that: At least one vent hole (112) is provided at the top of the containing groove (111), the diameter of the lower edge of the containing groove (111) is D2, D2≥5mm>D1, 2mm<D1<5mm, and the diameter of the vent hole (112) is D3, 1mm≤D3≤(D2-D1) / 2.

7. The negative ion generating device according to claim 6, characterized in that: The containing grooves (111) are arranged in an array around the negative ion generating devices (2).

8. The negative ion generating device according to claim 1, characterized in that: The cyclone engine lower cover (11) is provided with an air curtain exhaust port (113), and the fan (12) sucks air and exhausts air downward through the air curtain exhaust port (113).

9. A range hood, using the negative ion generating device according to any one of claims 1 to 8, characterized in that: The range hood body (3) comprises a cover plate (31), a top plate (32) and an installation cavity located between the cover plate (31) and the top plate (32); the negative ion generating device is arranged in the installation cavity; the cover plate (31) is provided with an air curtain suction port (311) corresponding to the fan (12); the cyclone engine lower cover (11) is installed on the top plate (32); and the top plate (32) is provided with an avoidance port corresponding to the cyclone engine lower cover (11).

10. The range hood according to claim 9, characterized in that: Two groups of negative ion generating devices are arranged in the installation cavity, and the cyclone engine lower covers (11) of the two groups of negative ion generating devices are arranged along the width direction of the top plate (32).

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