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, and the negative ion generating device comprises an air duct which is provided with an air inlet and an air outlet; the fan is arranged at the air inlet, and the exhaust side of the fan faces the interior of the air duct; the negative ion generation module is arranged in the air duct and comprises a negative ion generator and a driving assembly, and the driving assembly is used for driving the transmitting end of the negative ion generator to extend below the air outlet; compared with the prior art, according to the negative ion generating device, when a user conducts cooking operation, the user starts the range hood, the negative ion generating module is started, the driving assembly drives the transmitting end of the negative ion generator to stretch out to the position below the air outlet, the negative ion generator is started and generates negative ions, and when the range hood is turned off, the draught fan is turned off; meanwhile, the driving assembly drives the transmitting end of the negative-ion generator to retract to the position above the exhaust outlet, and oil stains and dust can be prevented from adhering to the transmitting end of the negative-ion generator to affect negative ion generation of the negative-ion generator.

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] an air duct having an air inlet and an air outlet;

[0006] A fan is arranged at the air inlet, with its exhaust side facing the air duct;

[0007] The negative ion generating module is arranged in the air duct and comprises a negative ion generator and a driving component. The driving component is used for driving the emission end of the negative ion generator to extend below the air outlet.

[0008] According to one embodiment of the utility model, the driving assembly includes a driving box, a driving member, a gear and a rack. The driving member is arranged on the driving box, the gear is rotatably connected in the driving box and connected to the driving end of the driving member, the rack is slidably connected in the driving box and meshes with the gear, and the negative ion generator is arranged on the rack.

[0009] According to an embodiment of the utility model, sliding grooves are provided on both sides of the driving box, sliding blocks are provided on both sides of the rack, and the sliding blocks are slidably connected in the sliding grooves.

[0010] According to one embodiment of the utility model, the driving component includes a driving member, a slider seat, front and rear sliders, upper and lower sliders and a reset member. The front and rear sliders are connected to the slider seat for forward and backward sliding, the upper and lower sliders are connected to the slider seat for upward and downward sliding, the reset member is arranged between the slider seat and the upper and lower sliders, the driving end of the driving member is connected to the front and rear sliders, the driving member drives the front and rear sliders to move forward so that the front and rear sliders act on the upper and lower sliders, drive the upper and lower sliders to move downward and compress the reset member; or the driving member drives the front and rear sliders to move backward so that the front and rear sliders leave the upper and lower sliders, the reset member resets and drives the upper and lower sliders to move upward; the negative ion generating module is arranged on the upper and lower sliders.

[0011] According to one embodiment of the utility model, a force-bearing portion is provided on the rear side of the upper and lower sliders, and the upper surface of the force-bearing portion is a first inclined surface, which is inclined downward from front to back; a force-applying portion is provided on the front side of the front and rear sliders, and the lower surface of the force-applying portion is provided with a second inclined surface, which is inclined downward from front to back, and the inclination of the first inclined surface is adapted to the inclination of the second inclined surface. When the driving member drives the front and rear sliders to move forward and backward, the second inclined surface slides along the first inclined surface.

[0012] According to one embodiment of the utility model, a guide column is provided on the slider seat, and a guide sleeve is provided on the upper and lower sliders, and the guide sleeve is sleeved on the guide column; an installation cavity is provided on the guide column, and a reset member is provided in the installation cavity, the lower end of the reset member abuts the bottom of the installation cavity, and the upper end of the reset member abuts the top of the guide sleeve.

[0013] According to an embodiment of the utility model, a guide block is provided on the guide column, a guide groove is provided on the guide sleeve, and the guide block is slidably connected in the guide groove.

[0014] According to one embodiment of the utility model, the slider seat is provided with front and rear sliding grooves, and the front and rear sliders are slidably connected in the front and rear sliding grooves.

[0015] A range hood adopts the above-mentioned negative ion generating device, including 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 air duct is installed on the top plate, and the top plate is provided with a avoidance port corresponding to the air duct.

[0016] According to one embodiment of the utility model, two groups of negative ion generating devices are arranged in the installation cavity, and the air ducts of the two groups of negative ion generating devices are arranged along the width direction of the top plate.

[0017] Compared with the prior art, the negative ion generating device of the utility model has the following advantages:

[0018] When the negative ion generating device of the utility model is applied to the range hood, when the user performs cooking operations, the user starts the range hood, the negative ion generating module starts, the driving component drives the emitting end of the negative ion generator to extend below the exhaust port, the negative ion generator starts and generates negative ions, and the fan runs at the same time. The fan introduces air into the air duct through the air inlet, the air entering the air duct flows along the air duct, and then is discharged downwardly through the exhaust port through the wind curtain. The wind curtain discharged downward blows the negative ions generated by the negative ion generator and blows the negative ions downward. The negative ions generated by the negative ion generator diffuse downward under the action of the wind of the wind curtain, and the diffusion range covers the position corresponding to the user's mouth and nose. When the oil smoke escapes outward, it is first blocked by the wind curtain. When part of it passes through the wind curtain, it is purified by the negative ions in the wind curtain. The user inhales air purified by negative ions, which will not affect the user's health. This part of the air is disturbed and diffused by the user and will not pollute the walls of the kitchen. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the first embodiment of the negative ion generating device of the utility model;

[0020] Figure 2 is a cross-sectional view of a negative ion generating device according to a first embodiment;

[0021] Figure 3 It is an exploded view of the first embodiment of the negative ion generating device of the utility model;

[0022] Figure 4 An exploded view of a first embodiment of a drive assembly;

[0023] Figure 5 is a schematic structural diagram of a second embodiment of a driving assembly;

[0024] Figure 6 is an exploded view of a second embodiment of a drive assembly;

[0025] Figure 7 This is an exploded view of the negative ion generator;

[0026] Figure 8 A front view of a range hood having a negative ion generating device according to the first embodiment;

[0027] Fig. 9 for Figure 8 Cross-sectional view in the middle AA direction (the emission head of the negative ion generator is retracted to the upper part of the exhaust port);

[0028] Fig.10 for Fig. 9 A magnified view of middle;

[0029] Fig.11 for Figure 8Cross-sectional view in the middle AA direction (the emission head of the negative ion generator extends below the exhaust port);

[0030] Fig.12 for Fig.11 Enlarged view of middle B;

[0031] In the figure: 1. air duct, 11. air inlet, 12. air outlet, 2. fan, 3. negative ion generating module, 31. negative ion generator, 311. carbon fiber head, 312. metal cladding, 313. wire, 32. drive assembly, 321. drive box, 3211. sliding groove, 322. driving member, 323. gear, 324. rack, 3241. sliding block, 325. slider seat, 3251. guide column, 3252. guide block, 3253. front and rear sliding grooves, 326. front and rear sliders, 3261. force applying part, 327. upper and lower sliders, 3271. force receiving part, 3272. guide sleeve, 3273. guide groove, 328. reset part, 4. range hood body, 41. cover plate, 411. air curtain suction port, 42. top plate.

[0032] 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

[0033] 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.

[0034] 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.

[0035] 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.

[0036] 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:

[0037] See also Figures 1 to 6 The utility model discloses a negative ion generating device, which is used for a range hood, and includes an air duct 1, a fan 2 and a negative ion generating module 3. The air duct 1 has an air inlet 11 and an air outlet 12; the fan 2 is arranged at the air inlet 11, and its exhaust side faces the air duct 1; the negative ion generating module 3 is arranged in the air duct 1, and includes a negative ion generator 31 and a driving component 32. The driving component 32 is used to drive the emission end of the negative ion generator 31 to extend below the air outlet 12. When the negative ion generating device of the utility model is applied to the range hood, when the user performs cooking operations, the user starts the range hood, the negative ion generating module 3 starts, the driving component 32 drives the emitting end of the negative ion generator 31 to extend below the exhaust port 12, the negative ion generator 31 starts and generates negative ions, and at the same time the fan 2 runs, the fan 2 introduces air into the air duct 1 through the air inlet 11, the air entering the air duct 1 flows along the air duct 1, and then is discharged downwardly through the exhaust port 12 through the wind curtain, the downwardly discharged wind curtain blows the negative ions generated by the negative ion generator 31, and blows the negative ions downward, the negative ions generated by the negative ion generator 31 diffuse downward under the action of the wind of the wind curtain, and the diffusion range covers the position corresponding to the user's mouth and nose, when the oil smoke escapes outward, it is first blocked by the wind curtain, and when part of it passes through the wind curtain, it is purified by the negative ions in the wind curtain, and the user inhales the air purified by the negative ions, which will not affect the user's health, and this part of the air is disturbed and diffused by the user, and will not pollute the walls of the kitchen. When the range hood is turned off, the fan 2 is turned off, and at the same time, the driving component 32 drives the emitting end of the negative ion generator 31 to retract above the exhaust port 12, which can prevent oil and dust from adhering to the emitting end of the negative ion generator 31 and affecting the negative ion generator 31 from generating negative ions.

[0038] When the fan 2 is running, the emitting end of the negative ion generator 31 extends downward to below the exhaust port 12, so that the negative ion generator 31 is as close as possible to the inhalation range corresponding to the user's mouth and nose. In this way, when the negative ions are blown downward by the wind curtain wind generated by the fan 2 through the air duct 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 generator 31 is placed in the air duct, in terms of distance, the distance from the negative ion generator 31 to the inhalation range corresponding to the user's mouth and nose is increased. When the negative ions generated by the negative ion generator 31 flow through the inhalation range corresponding to the user's mouth and nose, most of them may be consumed, 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 generator 31 does not extend from the exhaust port 12, the air flow at the emitting head of the negative ion generator 31 is not smooth, which affects the generation of negative ions.

[0039] When the negative ion generating device of the utility model is applied to the range hood, the negative ion generator 31 and the fan 2 can cooperate in a variety of ways. When the range hood has a smoke sensor, the fan 2 and the negative ion generator 31 can be linked with the smoke sensor. When the user is cooking, the fan 2 and the negative ion generator 31 are both started, and the fan 2 can exhaust air downward through the air duct and generate a wind curtain to block the fumes generated by cooking from escaping outward. When the wind curtain wind flows through, the negative ions generated by the negative ion generator 31 are driven downward by the wind curtain wind, and the negative ions flow downward with the wind curtain wind. 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. 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 exhaust fan of the range hood is turned off, the fan 2 and the negative ion generator 31 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 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 31. 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 31, 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 c, the smoke sensor will start the negative ion generator 31, and the negative ions generated by the negative ion generator 31 can be used to purify the kitchen air. At b, the control system of the range hood starts the fan 2 and the negative ion generator 31. The fan 2 exhausts air downward to form a wind curtain to prevent the backflow of oil smoke from escaping outward. The negative ion generator 31 generates negative ions, which flow downward with the wind curtain wind and diffuse in the wind curtain wind to purify the oil smoke passing 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 start fan 2 and the negative ion generator 31. The smoke exhaust fan works and sucks the air in the environment to discharge the backflow of oil smoke from the environment.

[0040] See also Figure 7The negative ion generator 31 of the utility model includes a carbon fiber head 311 and a metal cladding 312. The metal cladding 312 wraps one end of the carbon fiber head 311. The metal cladding 312 is connected to a high-voltage package through a wire 313, and the high-voltage package is connected to the circuit board of the range hood. When the negative ion generator 31 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 312 through the wire 313. The current transmitted to the metal cladding 312 is transmitted along the metal cladding 312 and transmitted to the surface of the carbon fiber head 311, and then transmitted along the surface of the carbon fiber head 311 to the tip of the carbon fiber head 311. The tip of the carbon fiber head 311 discharges, ionizes the air and generates negative ions. The tip of the carbon fiber head 311 is one end away from the metal cladding 312, so that the negative ions generated by the discharge of the tip of the carbon fiber head 311 are not easily extinguished by the metal cladding 312.

[0041] In the negative ion generating device of the utility model, at least the tip of the carbon fiber head 311 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 311 transfers the adsorbed water molecules to the surface of the carbon fiber head 311 through the hydrophilic effect of the surface of the carbon fiber head 311, and then transfers them to the top of the carbon fiber head 311 by using the water absorption and capillary action of the carbon fiber head 311, and enriches at the tip of the carbon fiber head 311, and then generates negative oxygen ions under voltage.

[0042] In the negative ion generating device of the utility model, the resistance at the metal cladding 312 is R1, the resistance at the tip of the metal cladding 312 connecting one end of the wire 313 to the carbon fiber head 311 is R2, the resistance at the wire 313 is R3, and the resistance at the part of the metal cladding 312 connecting one end of the wire 313 to the middle of the carbon fiber head 311 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 311 is the smallest, and the voltage flowing therethrough is the largest. When the tip of the carbon fiber head 311 is discharged, more negative ions are generated by ionizing the air.

[0043] See also Figure 5 and Figure 6The negative ion generating device of the present invention, the driving assembly 32 includes a driving box 321, a driving member 322, a gear 323 and a rack 324, the driving member 322 is arranged on the driving box 321, the gear 323 is rotatably connected in the driving box 321 and is connected to the driving end of the driving member 322, the rack 324 is slidably connected in the driving box 321 and meshes with the gear 323, and the negative ion generator 31 is arranged on the rack 324. When the fan 2 is started, the driving member 322 is started. The driving member 322 adopts a reduction motor. The output end of the reduction motor is connected to the gear 323. When the reduction motor is started, the gear 323 rotates. The gear 323 rotates and drives the rack 324 to slide downward along the driving box 321. The rack 324 slides downward and drives the negative ion generator 31 from the exhaust port 12; when the smoke machine is turned off, the fan 2 is closed, and the driving member 322 is started again. The driving member 322 drives the gear 323 to rotate in the opposite direction. The gear 323 rotates and drives the rack 324 to slide upward along the driving box 321. The rack 324 slides upward and drives the negative ion generator 31 to retract above the exhaust port 12.

[0044] See also Figure 5 and Figure 6 In the negative ion generating device of the utility model, sliding grooves 3211 are provided on both sides of the driving box 321, and sliding blocks 3241 are provided on both sides of the rack 324, and the sliding blocks 3241 are slidably connected in the sliding grooves 3211. When the gear 323 drives the rack 324 to slide along the driving box 321, the sliding blocks 3241 on both sides of the rack 324 slide along the sliding grooves 3211, and the sliding grooves 3211 can guide the movement of the rack 324 to ensure the linear movement of the rack 324; and sliding blocks 3241 are provided on both sides of the rack 324, and the sliding blocks 3241 are in contact with the sliding grooves 3211, so as to reduce the contact area between the rack 324 and the sliding grooves 3211, thereby reducing the friction force and making the rack 324 slide more smoothly along the sliding grooves 3211.

[0045] See also Figures 1 to 4In some other embodiments of the negative ion generating device, the driving assembly 32 includes a driving member 322, a slider seat 325, a front and rear slider 326, an upper and lower slider 327 and a reset member 328. The front and rear slider 326 is connected to the slider seat 325 in a front-rear sliding manner, and the upper and lower sliders 327 are connected to the slider seat 325 in an up-and-down sliding manner. The reset member 328 is arranged between the slider seat 325 and the upper and lower sliders 327. The driving end of the driving member 322 is connected to the front and rear sliders 326. The driving member 322 drives the front and rear sliders 326 to move forward so that the front and rear sliders 326 act on the upper and lower sliders 327, driving the upper and lower sliders 327 to move downward and compress the reset member 328; or the driving member 322 drives the front and rear sliders 326 to move backward so that the front and rear sliders 326 leave the upper and lower sliders 327, and the reset member 328 resets and drives the upper and lower sliders 327 to move upward; the negative ion generating module 3 is arranged on the upper and lower sliders 327. When the fan 2 is started, the driving member 322 is started. The driving member 322 adopts an electric push rod. The output end of the electric push rod is connected to the front and rear sliders 326. The electric push rod pushes the front and rear sliders 326 to slide forward along the slider seat 325. The front and rear sliders 326 act on the upper and lower sliders 327 and squeeze the upper and lower sliders 327 downward, so that the upper and lower sliders 327 slide downward along the slider seat 325. When the upper and lower sliders 327 slide downward along the slider seat 325, the reset member 328 is compressed, and the negative ion generator 31 moves downward with the upper and lower sliders 327 And it extends to the bottom of the exhaust port 12; when the smoke machine is turned off, the fan 2 is turned off, and the driving member 322 is started again. The driving member 322 pulls the front and rear sliders 326 to slide backward along the slider seat 325, and the front and rear sliders 326 gradually leave the upper and lower sliders 327. The reset member 328 resets and pushes the upper and lower sliders 327 upward, so that the upper and lower sliders 327 slide upward along the slider seat 325. When the upper and lower sliders 327 slide upward along the slider seat 325, the negative ion generator 31 moves upward with the upper and lower sliders 327 and retracts to above the exhaust port 12.

[0046] exist Figures 1 to 4In the embodiment of the negative ion generating device shown, a force-bearing portion 3271 is provided on the rear side of the upper and lower sliders 327, and the upper surface of the force-bearing portion 3271 is a first inclined surface, which is inclined downward from front to back; a force-applying portion 3261 is provided on the front side of the front and rear sliders 326, and a second inclined surface is provided on the lower surface of the force-applying portion 3261, which is inclined downward from front to back, and the inclination of the first inclined surface is adapted to the inclination of the second inclined surface. When the driving member 322 drives the front and rear sliders 326 to move forward and backward, the second inclined surface slides along the first inclined surface. When the fan 2 is started, the driving member 322 is started, and the driving member 322 pushes the front and rear sliders 326 to slide forward along the slider seat 325. The force-applying parts 3261 of the front and rear sliders 326 act on the force-bearing parts 3271 of the upper and lower sliders 327, and the second inclined surface begins to slide along the first inclined surface. During the sliding process of the second inclined surface along the first inclined surface, the front and rear sliders 326 press the force-bearing parts 3271 of the upper and lower sliders 327 downward through the force-applying parts 3261, and press the upper and lower sliders 327 downward, so that the upper and lower sliders 327 slide downward along the slider seat 325. When the upper and lower sliders 327 slide downward along the slider seat 325, the reset member 328 is compressed, and the negative ion generator 31 moves downward with the upper and lower sliders 327 and extends to the exhaust port. 12 below; when the smoke machine is turned off, the fan 2 is turned off, and the driving member 322 is started again, and the driving member 322 pulls the front and rear sliders 326 to slide backward along the slider seat 325, and the force-applying parts 3261 of the front and rear sliders 326 gradually leave the force-bearing parts 3271 of the upper and lower sliders 327, and the second inclined surface slides down along the first inclined surface, and the front and rear sliders 326 press the force-bearing parts 3271 of the upper and lower sliders 327 downward through the force-applying parts 3261 to reduce the force, and the reset member 328 resets and lifts the upper and lower sliders 327 upward, so that the upper and lower sliders 327 slide upward along the slider seat 325. When the upper and lower sliders 327 slide upward along the slider seat 325, the negative ion generator 31 moves upward with the upper and lower sliders 327 and retracts to above the exhaust port 12.

[0047] exist Figures 1 to 4 In the embodiment of the negative ion generating device shown, a guide column 3251 is provided on the slider seat 325, and a guide sleeve 3272 is provided on the upper and lower sliders 327, and the guide sleeve 3272 is sleeved on the guide column 3251; a mounting cavity is provided on the guide column 3251, and a reset member 328 is provided in the mounting cavity, and the lower end of the reset member 328 abuts against the bottom of the mounting cavity, and the upper end of the reset member 328 abuts against the top of the guide sleeve 3272. In the process of the upper and lower sliders 327 sliding up and down along the slider seat 325, the reset member 328 can only expand and contract up and down in the mounting cavity, and cannot be twisted and deformed, so that the linearity of the movement of the upper and lower sliders 327 can be ensured.

[0048] exist Figures 1 to 4In the embodiment of the negative ion generating device shown, a guide block 3252 is provided on the guide column 3251, a guide groove 3273 is provided on the guide sleeve 3272, and the guide block 3252 is slidably connected in the guide groove 3273. In the process of the upper and lower sliders 327 sliding up and down along the slider seat 325, the guide block 3252 slides along the guide groove 3273, which can ensure the linear movement of the guide column 3251 in the guide sleeve 3272. At the same time, when the front and rear sliders 326 leave the upper and lower sliders 327 and the reset member 328 is reset, the limit of the guide block 3252 can prevent the upper and lower sliders 327 from bouncing off the slider seat 325.

[0049] exist Figures 1 to 4 In the embodiment of the negative ion generating device shown, the slider seat 325 is provided with a front and rear slide groove 3253, and the front and rear sliders 326 are slidably connected in the front and rear slide grooves 3253. When the driving member 322 pushes or pulls the front and rear sliders 326 to slide along the slider seat 325, the front and rear sliders 326 slide along the front and rear slide grooves 3253, which may include a linear sliding line of the front and rear sliders 326 along the slider seat 325, so that the second inclined surface on the force applying portion 3261 of the front and rear sliders 326 can just act on the first inclined surface of the force receiving portion 3271 of the upper and lower sliders 327.

[0050] See also Figures 8 to 12The utility model also discloses a range hood, which adopts the negative ion generating device mentioned above. The range hood disclosed in the utility model includes a range hood body 4, which has a cover plate 41, a top plate 42 and an installation cavity between the cover plate 41 and the top plate 42, the negative ion generating device is arranged in the installation cavity, the cover plate 41 is provided with an air curtain suction port 411 corresponding to the fan 2, the air duct 1 is installed on the top plate 42, and the top plate 42 is provided with an avoidance port corresponding to the air duct 1. When the user is cooking, the range hood is turned on and the negative ion generating module 3 is running. The driving component 32 drives the emitting end of the negative ion generator 31 to extend below the exhaust port 12, and the negative ion generator 31 is started. When the negative ion generator 31 is running, 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 312 through the wire 313. The current transmitted to the metal cladding 312 is transmitted along the metal cladding 312 and transmitted to the surface of the carbon fiber head 311, and then transmitted along the surface of the carbon fiber head 311 to the tip of the carbon fiber head 311. The tip of the carbon fiber head 311 discharges, ionizes the air and generates negative ions. At the same time, the fan 2 is running, and the external air passes through the air curtain suction port 4 11 enters the air inlet side of the fan 2, and then the fan 2 introduces air into the air duct 1 through the air inlet 11. The air entering the air duct 1 flows along the air duct 1, and then is discharged downward through the exhaust port 12 through the wind curtain. The wind curtain discharged downward blows the negative ions generated by the negative ion generator 31, and blows the negative ions downward. The negative ions generated by the negative ion generator 31 diffuse downward under the action of the wind curtain, and the diffusion range covers the position corresponding to the user's mouth and nose. When the oil smoke escapes to the outside, it is first blocked by the wind curtain. When part of it passes through the wind curtain, it is purified by the negative ions in the wind curtain. The user inhales air purified by negative ions, which will not affect the user's health. This part of the air is disturbed and diffused by the user, and will not pollute the walls of the kitchen. When the smoker is turned off, the fan 2 is turned off, and the circuit board disconnects the high-voltage package from the circuit. The negative ion generator 31 no longer generates negative ions, and the drive component 32 drives the emitting end of the negative ion generator 31 to retract above the exhaust port 12, which can prevent oil and dust from adhering to the emitting end of the negative ion generator 31 and affecting the generation of negative ions by the negative ion generator 31.

[0051] See also Figures 8 to 12In the range hood of the utility model, two groups of negative ion generating devices are arranged in the installation cavity, and the air ducts 1 of the two groups of negative ion generating devices are arranged along the width direction of the top plate 42. When the range hood is started, the two groups of negative ion generating devices on both sides of the range hood are started at the same time, and the fans 2 and negative ion generating modules 3 of the two groups of negative ion generating devices are running, and the fan 2 discharges air into the air duct 1, and the air in the air duct 1 flows along the air duct 1 and is discharged downward through the exhaust port 12. In the process of the air in the air duct 1 being discharged downward through the exhaust port 12, the tip of the carbon fiber head 311 of the negative ion generator 31 discharges, ionizes the air and generates negative ions, and the air in the air duct 1 is discharged downward through the exhaust port 12 to form a wind curtain that blows the negative ions generated by the negative ion generator 31 downward, and forms a wind curtain containing negative ions on both sides of the range hood, which has a better effect of blocking and purifying oil smoke.

[0052] 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: An air duct (1) having an air inlet (11) and an air outlet (12); A fan (2) is arranged at the air inlet (11), with its exhaust side facing the inside of the air duct (1); A negative ion generating module (3) is arranged in the air duct (1), comprising a negative ion generator (31) and a driving component (32), wherein the driving component (32) is used to drive the emission end of the negative ion generator (31) to extend below the air outlet (12).

2. The negative ion generating device according to claim 1, characterized in that: The driving assembly (32) comprises a driving box (321), a driving member (322), a gear (323) and a rack (324); the driving member (322) is arranged on the driving box (321); the gear (323) is rotatably connected to the driving box (321) and is connected to the driving end of the driving member (322); the rack (324) is slidably connected to the driving box (321) and is meshed with the gear (323); and the negative ion generator (31) is arranged on the rack (324).

3. The negative ion generating device according to claim 2, characterized in that: Sliding grooves (3211) are provided on both sides of the driving box (321), and sliding blocks (3241) are provided on both sides of the rack (324), and the sliding blocks (3241) are slidably connected in the sliding grooves (3211).

4. The negative ion generating device according to claim 1, characterized in that: The driving assembly (32) comprises a driving member (322), a slider seat (325), a front and rear slider (326), an upper and lower slider (327) and a reset member (328), wherein the front and rear slider (326) is connected to the slider seat (325) in a front-rear sliding manner, the upper and lower sliders (327) are connected to the slider seat (325) in an up-and-down sliding manner, the reset member (328) is arranged between the slider seat (325) and the upper and lower sliders (327), the driving end of the driving member (322) is connected to the front and rear sliders (326), and the driving member (322 ) drives the front and rear sliders (326) to move forward so that the front and rear sliders (326) act on the upper and lower sliders (327), drive the upper and lower sliders (327) to move downward and compress the reset member (328); or the driving member (322) drives the front and rear sliders (326) to move backward so that the front and rear sliders (326) leave the upper and lower sliders (327), the reset member (328) resets and drives the upper and lower sliders (327) to move upward; the negative ion generating module (3) is arranged on the upper and lower sliders (327).

5. The negative ion generating device according to claim 4, characterized in that: The rear side of the upper and lower sliders (327) is provided with a force-bearing portion (3271), the upper surface of the force-bearing portion (3271) is a first inclined surface, and the first inclined surface is inclined downward from front to back; the front side of the front and rear sliders (326) is provided with a force-applying portion (3261), the lower surface of the force-applying portion (3261) is provided with a second inclined surface, and the second inclined surface is inclined downward from front to back, the inclination of the first inclined surface is adapted to the inclination of the second inclined surface, and when the driving member (322) drives the front and rear sliders (326) to move forward and backward, the second inclined surface slides along the first inclined surface.

6. The negative ion generating device according to claim 4, characterized in that: The slider seat (325) is provided with a guide column (3251), and the upper and lower sliders (327) are provided with a guide sleeve (3272), and the guide sleeve (3272) is sleeved on the guide column (3251); the guide column (3251) is provided with a mounting cavity, and the reset member (328) is arranged in the mounting cavity, and the lower end of the reset member (328) abuts against the bottom of the mounting cavity, and the upper end of the reset member (328) abuts against the top of the guide sleeve (3272).

7. The negative ion generating device according to claim 6, characterized in that: The guide column (3251) is provided with a guide block (3252), the guide sleeve (3272) is provided with a guide groove (3273), and the guide block (3252) is slidably connected in the guide groove (3273).

8. The negative ion generating device according to claim 4, characterized in that: The slider seat (325) is provided with front and rear sliding grooves (3253), and the front and rear sliding blocks (326) are slidably connected in the front and rear sliding grooves (3253).

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 (4) comprises a cover plate (41), a top plate (42) and an installation cavity located between the cover plate (41) and the top plate (42); the negative ion generating device is arranged in the installation cavity; the cover plate (41) is provided with an air curtain suction port (411) corresponding to the fan (2); the air duct (1) is installed on the top plate (42); and the top plate (42) is provided with an avoidance port corresponding to the air duct (1).

10. The range hood according to claim 9, characterized in that: Two groups of the negative ion generating devices are arranged in the installation cavity, and the air ducts (1) of the two groups of the negative ion generating devices are arranged along the width direction of the top plate (42).

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