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 a mounting plate which is provided with a containing groove; a transmitting end of the negative-ion generator penetrates through the mounting channel and extends into the accommodating groove, and a gap between the part, arranged in the mounting channel, of the negative-ion generator and the inner wall surface of the mounting channel forms a first air inlet channel; the driving assembly is used for driving the transmitting end of the negative ion generator to extend out of or retract into the accommodating groove; compared with the prior art, when the negative ion generating device is applied to the range hood, a user starts the range hood, the driving assembly drives the transmitting end of the negative ion generator to extend out of the first side of the mounting plate, and part of air enters the containing groove through the first air inlet channel and flows in the direction away from the first side of the mounting plate; the negative ions are blown in the direction away from the first side of the mounting plate, and when oil fume escapes outwards, the oil fume is purified by the negative ions, so that a healthy cooking environment is provided for a user.

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] A mounting plate, on which a receiving groove is provided, the opening of the receiving groove faces the first side of the mounting plate, and a mounting channel penetrating the receiving groove is provided at the bottom of the receiving groove;

[0006] A negative ion generator, the emission end of which extends into the receiving groove through the installation channel, and the gap between the portion of the negative ion generator placed in the installation channel and the inner wall surface of the installation channel constitutes a first air inlet channel, and air flowing from the second side of the installation plate to the first side of the installation plate can enter the receiving groove through the first air inlet channel and flow in a direction away from the first side of the installation plate;

[0007] The driving component is arranged on the mounting plate and is used for driving the emission end of the negative ion generator to extend from or retract into the accommodating groove.

[0008] According to one embodiment of the utility model, when the driving component drives the emitting end of the negative ion generator to extend out of the accommodating groove, the distance that the emitting end of the negative ion generator extends out of the first side of the mounting plate is x, and the head diameter of the emitting end of the negative ion generator is D1, x≥D1.

[0009] According to an embodiment of the present invention, the head diameter of the emission end of the negative ion generator is D1, the lower edge diameter of the receiving groove is D2, D2≥5mm>D1, 2mm<D1<5mm.

[0010] According to one embodiment of the utility model, a vent hole is provided at the top of the accommodating groove, and the vent hole is connected to the channel of the accommodating groove to form a second air inlet channel. The air on the second side of the mounting plate can enter the accommodating groove through the first air inlet channel and the second air inlet channel and flow from the accommodating groove toward the direction away from the first side of the mounting plate.

[0011] According to one embodiment of the present invention, the head diameter of the emission end of the negative ion generator is D1, the lower edge diameter of the accommodating groove is D2, D2≥5mm, 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 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, and its emitting end passes through the installation channel and extends into the accommodating groove.

[0013] 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 generator is arranged on the upper and lower sliders.

[0014] According to one embodiment of the present invention, an air supply device is further included, and the air supply device transports air from the second side of the mounting plate to the first side of the mounting plate.

[0015] According to one embodiment of the utility model, the air supply device includes a fan and an air duct, one side of the air duct has an air inlet, the fan is installed at the air inlet, the bottom of the air duct is connected to the second side of the mounting plate, and the mounting plate is provided with a plurality of wind curtain exhaust holes, and the incoming air in the air duct is discharged to the first side of the mounting plate through the wind curtain exhaust holes.

[0016] 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 top plate is provided with a avoidance opening corresponding to the installation plate, an air supply device is also provided in the installation cavity, the air supply device is installed on the second side of the installation plate, the cover plate is provided with a wind curtain suction port corresponding to the air supply device, the air supply device sucks air from the wind curtain suction port and transports the air downward through the installation 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 driving component starts, and the driving component drives the emitting end of the negative ion generator to move along the installation channel and extend from the receiving groove, so that the emitting end of the negative ion generator extends to the first side of the mounting plate, and then the negative ion generator starts and generates negative ions, and the airflow on the second side of the mounting plate flows to the first side of the mounting plate through the mounting plate. In the process of flowing to the first side, part of the air enters the receiving groove through the first air inlet channel and flows in the direction away from the first side of the mounting plate, and the negative ions are blown in the direction away from the first side of the mounting plate. The diffusion range of the negative ions generated by the negative ion generator covers the position corresponding to the user's mouth and nose. When the oil smoke escapes outward, it is purified by the negative ions, avoiding the user from inhaling the oil smoke, and providing a healthy cooking environment for the user. When the range hood is turned off, the driving component drives the emitting end of the negative ion generator to retract into the receiving groove, which can avoid oil stains and dust adhering to the emitting end of the negative ion generator and affecting the generation of negative ions by the negative ion generator. 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 It is an exploded view of the first embodiment of the negative ion generating device of the utility model;

[0021] Figure 3 It is a structural schematic diagram of a mounting plate of a first embodiment of the negative ion generating device of the utility model;

[0022] Figure 4 An exploded view of a driving assembly of the first embodiment of the negative ion generating device of the utility model;

[0023] Figure 5 An exploded view of a negative ion generator of the novel negative ion generating device;

[0024] Figure 6 It is a cross-sectional view of a second embodiment of the negative ion generating device of the present utility model;

[0025] Figure 7 It is a structural schematic diagram of a driving component of a second embodiment of the negative ion generating device of the utility model;

[0026] Figure 8 An exploded view of a driving assembly of a second embodiment of the negative ion generating device of the utility model;

[0027] Fig. 9 An exploded view of a range hood having a negative ion generating device according to the first embodiment;

[0028] Fig.10 It is a cross-sectional view of a range hood having a negative ion generating device according to the first embodiment (the negative ion generator is hidden in the receiving tank);

[0029] Fig.11 for Fig.10 A magnified view of middle;

[0030] Fig.12 It is a cross-sectional view of a range hood having a negative ion generating device according to the first embodiment (the negative ion generator extends below the receiving tank);

[0031] Fig.13 for Fig.12 Enlarged view of middle B;

[0032] In the figure: 1. mounting plate, 11. receiving groove, 12. mounting channel, 13. vent, 14. air curtain exhaust hole, 2. negative ion generator, 21. carbon fiber head, 22. metal cladding, 23. wire, 3. drive assembly, 31. drive box, 311. sliding groove, 32. drive member, 33. gear, 34. rack, 341. sliding block, 35. slider seat, 351. guide column, 352. guide block, 353. front and rear slide grooves, 36. front and rear sliders, 361. force-applying part, 37. upper and lower sliders, 371. force-bearing part, 372. guide sleeve, 373. guide groove, 38. reset part, 4. air supply device, 41. fan, 42. air duct, 421. air inlet, 5. range hood body, 51. cover plate, 511. air curtain air inlet, 52. top plate.

[0033] 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

[0034] 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.

[0035] 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.

[0036] 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.

[0037] 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:

[0038] See also Figures 1 to 8The utility model discloses a negative ion generating device, which is used for a range hood, and includes a mounting plate 1, a negative ion generator 2 and a driving assembly 3. A receiving groove 11 is provided on the mounting plate 1, and an opening of the receiving groove 11 faces a first side of the mounting plate 1. A mounting channel 12 penetrating the receiving groove 11 is provided at the bottom of the receiving groove 11; an emitting end of the negative ion generator 2 extends into the receiving groove 11 through the mounting channel 12, and a gap between a portion of the negative ion generator 2 placed in the mounting channel 12 and an inner wall surface of the mounting channel 12 constitutes a first air intake channel, and air flowing from the second side of the mounting plate 1 to the first side of the mounting plate 1 can enter the receiving groove 11 through the first air intake channel and flow in a direction away from the first side of the mounting plate 1; the driving assembly 3 is provided on the mounting plate 1, and is used to drive the emitting end of the negative ion generator 2 to extend from or retract into the receiving groove 11. 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 driving component 3 starts, and the driving component 3 drives the emitting end of the negative ion generator 2 to move along the installation channel 12 and extend from the receiving groove 11, so that the emitting end of the negative ion generator 2 extends to the first side of the mounting plate 1, and then the negative ion generator 2 starts and generates negative ions, and the airflow on the second side of the mounting plate 1 flows toward the first side of the mounting plate 1. In the process of flowing toward the first side, part of the air enters the receiving groove 11 through the first air inlet channel and flows in the direction away from the first side of the mounting plate 1, blowing the negative ions in the direction away from the first side of the mounting plate 1, and the diffusion range of the negative ions generated by the negative ion generator 2 covers the position corresponding to the user's mouth and nose. When the oil smoke escapes outward, it is purified by the negative ions, avoiding the user from inhaling the oil smoke, thereby providing the user with a healthy cooking environment. When the cigarette smoke machine is turned off, the driving component 3 drives the emitting end of the negative ion generator 2 to retract into the accommodating groove 11, which can prevent oil and dust from adhering to the emitting end of the negative ion generator 2 and affecting the negative ion generator 2 to generate negative ions.

[0039] The negative ion generating device of the utility model, when the negative ion generating device is applied to the range hood, the first side of the mounting plate 1 is the lower side of the mounting plate 1, the second side of the mounting plate 1 is the upper side of the mounting plate 1, and the emitting end of the negative ion generator 2 is extended to the first side of the mounting plate 1 under the action of the driving component 3, so that the negative ion generator 2 is as close as possible to the inhalation range corresponding to the mouth and nose of the user. In this way, when the airflow on the second side of the mounting plate 1 flows to the first side and blows the negative ions downward, the negative ions can quickly reach the inhalation range corresponding to the mouth and nose of the user, and the negative ions are consumed less, which can improve the inhalation range of the user's mouth. The purification effect of the air in the inhalation range corresponding to the nose is reduced; secondly, if the emission end of the negative ion generator 2 is placed in the receiving groove 11, in terms of distance, the distance from the negative ion generator 2 to the inhalation range corresponding to the user's mouth and nose is increased, and the negative ions generated by the negative ion generator 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 emission head of the negative ion generator 2 does not extend from the receiving groove 11, the air flow at the emission head of the negative ion generator 2 is not smooth, affecting the generation of negative ions.

[0040] See also Figure 5 The negative ion generator 2 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 generator 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.

[0041] 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.

[0042] 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.

[0043] The negative ion generating device of the utility model can ionize the air and generate negative ions when the portion of the carbon fiber head 21 of the negative ion generator 2 extending out of the metal cladding 22 contacts the air after the negative ion generator 2 is powered on. A receiving groove 11 with an opening facing downward is provided on the mounting plate 1. The portion of the carbon fiber head 21 of the negative ion generator 2 placed in the receiving groove 11 will also contact the air in the receiving groove 11, ionize the air and generate negative ions, and the amount of negative ions generated can be increased.

[0044] In the negative ion generating device of the utility model, when the driving component 3 drives the emitting end of the negative ion generator 2 to extend out of the receiving groove 11, the distance that the emitting end of the negative ion generator 2 extends out of the first side of the mounting plate 1 is x, and the head diameter of the emitting end of the negative ion generator 2 is D1, and x≥D1. The longer the length of the emitting end of the negative ion generator 2 extending to the lower surface of the mounting plate 1, the smaller the distance from the user's mouth and nose to the corresponding inhalation range, 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 generator 2 extends downward from the lower surface of the mounting plate 1 is as high as 100%, which will affect the user's operation and the overall appearance of the smoke machine. Therefore, in this embodiment, the distance that the emitting end of the negative ion generator 2 extends downward from the lower surface of the mounting plate 1 is greater than or equal to the head diameter of the emitting end of the negative ion generator 2, so that the distance between the emitting end of the negative ion generator 2 and the mounting plate 1 can be sufficient to reduce the consumption of negative ions by the mounting plate 1, and the emitting end of the negative ion generator 2 can also be fully in contact with the air to generate a large amount of negative ions.

[0045] In the negative ion generating device of the utility model, the head diameter of the emitting end of the negative ion generator 2 is D1, and the lower edge diameter of the containing tank 11 is D2, D2≥5mm>D1, 2mm<D1<5mm. The lower edge diameter of the containing tank 11 is larger than the head diameter of the emitting end of the negative ion generator 2, and the emitting end of the negative ion generator 2 will not contact the wall surface of the containing tank 11. The larger the space of the containing tank 11 surrounding the negative ion generator 2, the more negative ions are generated, and the less negative ions are eliminated when flowing out of the containing tank 11, which can improve the purification effect of the negative ions generated by the negative ion generator 2.

[0046] See also Figure 3 In the negative ion generating device of the present invention, a vent hole 13 is provided at the top of the receiving tank 11. The vent hole 13 is connected to the channel of the receiving tank 11 to form a second air inlet channel. The air on the second side of the mounting plate 1 can enter the receiving tank 11 through the first air inlet channel and the second air inlet channel and flow from the receiving tank 11 to the direction away from the first side of the mounting plate 1. When the airflow on the second side of the mounting plate 1 flows toward the first side of the mounting plate 1, the airflow enters the receiving tank 11 through the gap between the part of the negative ion generator 2 placed in the mounting channel 12 and the inner wall surface of the mounting channel 12 to form the first air inlet channel and the second air inlet channel formed by the vent hole 13, and blows the negative ions generated by the negative ion generator 2 toward the mounting plate 1 for the first time, so that the negative ions diffuse farther.

[0047] The negative ion generating device of the utility model is characterized in that the head diameter of the emission end of the negative ion generator 2 is D1, the lower edge diameter of the receiving groove 11 is D2, D2≥5mm, 2mm<D1<5mm, and the diameter of the vent hole 13 is D3, 1mm≤D3≤(D2-D1) / 2. When the negative ion generating device is applied to the range hood, when the range hood is working, the air on the second side of the mounting plate 1 is discharged to the first side of the mounting plate 1, and the air discharged to the first side can enter the receiving groove 11 through the vent hole 13, blowing the negative ions in the receiving groove 11 and the negative ions at the emission end of the negative ion generator 2 downward, thereby increasing the diffusion distance of the negative ions. Furthermore, the negative ion generator 2 generates negative ions by discharging the tip of the carbon fiber head 21 of the negative ion generator 2 to ionize the air, so that the air on the second side of the mounting plate 1 enters the receiving groove 11 through the vent hole 13, so that the carbon fiber head 21 can partially ionize the air in the receiving groove 11 and generate 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 generator 2 is installed in the receiving tank 11, the top of the receiving tank 11 has an installation channel 12, and the carbon fiber head 21 of the negative ion generator 2 passes through the installation channel 12 and is placed in the receiving tank 11, and the emission end extends from the receiving tank 11. At this time, the width of the ring around the installation channel 12 is D2-D1, and the diameter D3 of the vent 13 must satisfy D3≤(D2-D1) / 2. When D3=(D2-D1) / 2, the vent 13 can form the installation channel 12, the carbon fiber head 21 directly passes through the vent 13 into the receiving tank 11, and the emission end extends out of the receiving tank 11. When the direct D3 of the vent hole 13 is less than (D2-D1) / 2, the vent hole 13 is a hole arranged on a ring around the installation channel 12 and connected to the receiving groove 11. The larger the aperture of the vent hole 13, the smaller the wind resistance when the air on the second side of the installation plate 1 enters the receiving groove 11 through the vent hole 13, the smaller the speed of the airflow entering the receiving groove 11, and the smaller the distance that the airflow flowing out of the receiving groove 11 blows the negative ions. The smaller the aperture of the vent hole 13, the smaller the air on the second side of the installation plate 1 enters the receiving groove through the vent hole 13. The greater the wind resistance at 11, the greater the speed of the air flow entering the receiving tank 11, and the greater the distance that the air flow out of the receiving tank 11 blows the negative ions. However, if the aperture of the vent 13 is too small, it will affect the amount of air entering the receiving tank 11 and generate noise. Therefore, in this embodiment, the aperture D3 of the vent 13 satisfies 1mm≤D3, which can not only ensure the amount of air entering the receiving tank 11, but also make the air entering the receiving tank 11 have sufficient wind speed to blow the negative ions to the corresponding inhalation range of the user's mouth and nose.

[0048] See also Figures 6 to 8 ,exist Figures 6 to 8 In the embodiment of the negative ion generating device shown, the driving assembly 3 includes a driving box 31, a driving member 32, a gear 33 and a rack 34. The driving member 32 is arranged on the driving box 31, the gear 33 is rotatably connected in the driving box 31 and is connected to the driving end of the driving member 32, the rack 34 is slidably connected in the driving box 31 and meshes with the gear 33, and the negative ion generator 2 is arranged on the rack 34, and its emitting end passes through the installation channel 12 and extends into the accommodating groove 11. The driving member 32 adopts a reduction motor. When the driving component 3 is started, the driving member 32 is started, and the output end of the reduction motor is connected to the gear 33. When the reduction motor is started, the gear 33 rotates, and the gear 33 rotates and drives the rack 34 to slide downward along the driving box 31. The rack 34 slides downward and drives the negative ion generator 2 to extend from the installation channel 12 to the accommodating groove 11; when the cigarette smoke machine is turned off, the driving member 32 is started again, and the driving member 32 drives the gear 33 to rotate in the opposite direction. The gear 33 rotates and drives the rack 34 to slide upward along the driving box 31. The rack 34 slides upward and drives the negative ion generator 2 to retract into the accommodating groove 11 along the installation channel 12.

[0049] See also Figures 6 to 8 ,exist Figures 6 to 8 In the embodiment of the negative ion generating device shown, sliding grooves 311 are provided on both sides of the driving box 31, and sliding blocks 341 are provided on both sides of the rack 34, and the sliding blocks 341 are slidably connected in the sliding grooves 311. When the gear 33 drives the rack 34 to slide along the driving box 31, the sliding blocks 341 on both sides of the rack 34 slide along the sliding grooves 311, and the sliding grooves 311 can guide the movement of the rack 34 to ensure the linear movement of the rack 34; and sliding blocks 341 are provided on both sides of the rack 34, and the sliding blocks 341 are in contact with the sliding grooves 311, reducing the contact area between the rack 34 and the sliding grooves 311, which can reduce friction and make the rack 34 slide more smoothly along the sliding grooves 311.

[0050] See also Figures 1 to 4 ,exist Figures 1 to 4In the embodiment of the negative ion generating device shown, the driving assembly 3 includes a driving member 32, a slider seat 35, a front and rear sliders 36, an upper and lower sliders 37 and a reset member 38. The front and rear sliders 36 are connected to the slider seat 35 in a front-rear sliding manner, and the upper and lower sliders 37 are connected to the slider seat 35 in an up-and-down sliding manner. The reset member 38 is arranged between the slider seat 35 and the upper and lower sliders 37. The driving end of the driving member 32 is connected to the front and rear sliders 36. The driving member 32 drives the front and rear sliders 36 to move forward so that the front and rear sliders 36 act on the upper and lower sliders 37, drive the upper and lower sliders 37 to move downward and compress the reset member 38; or the driving member 32 drives the front and rear sliders 36 to move backward so that the front and rear sliders 36 leave the upper and lower sliders 37, and the reset member 38 resets and drives the upper and lower sliders 37 to move upward; the negative ion generator 2 is arranged on the upper and lower sliders 37. When the driving assembly 3 is started, the driving member 32 is started. The driving member 32 adopts an electric push rod. The output end of the electric push rod is connected to the front and rear sliders 36. The electric push rod pushes the front and rear sliders 36 to slide forward along the slider seat 35. The front and rear sliders 36 act on the upper and lower sliders 37 and squeeze the upper and lower sliders 37 downward, so that the upper and lower sliders 37 slide downward along the slider seat 35. When the upper and lower sliders 37 slide downward along the slider seat 35, the reset member 38 is compressed, and the negative ion generator 2 moves downward with the upper and lower sliders 37 and extends to the bottom of the accommodating groove 11; when the cigarette smoke machine is turned off, the driving member 32 is started again, and the driving member 32 pulls the front and rear sliders 36 to slide backward along the slider seat 35, and the front and rear sliders 36 gradually leave the upper and lower sliders 37. The reset member 38 resets and pushes the upper and lower sliders 37 upward, so that the upper and lower sliders 37 slide upward along the slider seat 35. When the upper and lower sliders 37 slide upward along the slider seat 35, the negative ion generator 2 moves upward with the upper and lower sliders 37 and retracts into the accommodating groove 11.

[0051] See also Figures 1 to 4 ,exist Figures 1 to 4In the embodiment of the negative ion generating device shown, a force-bearing portion 371 is provided on the rear side of the upper and lower sliders 37, and the upper surface of the force-bearing portion 371 is a first inclined surface, which is inclined downward from front to back; a force-applying portion 361 is provided on the front side of the front and rear sliders 36, and a second inclined surface is provided on the lower surface of the force-applying portion 361, 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 32 drives the front and rear sliders 36 to move forward and backward, the second inclined surface slides along the first inclined surface. When the negative ion generating device is started, the driving member 32 is started, and the driving member 32 pushes the front and rear sliders 36 to slide forward along the slider seat 35. The force-applying parts 361 of the front and rear sliders 36 act on the force-bearing parts 371 of the upper and lower sliders 37, 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 36 press the force-bearing parts 371 of the upper and lower sliders 37 downward through the force-applying parts 361, and press the upper and lower sliders 37 downward, so that the upper and lower sliders 37 slide downward along the slider seat 35. When the upper and lower sliders 37 slide downward along the slider seat 35, the reset member 38 is compressed, and the negative ion generator 2 moves downward with the upper and lower sliders 37 and extends to Below the accommodating groove 11; when the negative ion generating device is turned off, the driving member 32 is started again, and the driving member 32 pulls the front and rear sliders 36 to slide backward along the slider seat 35, and the force-applying parts 361 of the front and rear sliders 36 gradually leave the force-bearing parts 371 of the upper and lower sliders 37, and the second inclined surface slides down along the first inclined surface, and the front and rear sliders 36 press the force-bearing parts 371 of the upper and lower sliders 37 downward through the force-applying parts 361, and the force becomes smaller, and the reset member 38 resets and lifts the upper and lower sliders 37 upward, so that the upper and lower sliders 37 slide upward along the slider seat 35. When the upper and lower sliders 37 slide upward along the slider seat 35, the negative ion generator 2 moves upward with the upper and lower sliders 37 and retracts into the accommodating groove 11.

[0052] See also Figures 1 to 4 ,exist Figures 1 to 4 In the embodiment of the negative ion generating device shown, a guide column 351 is provided on the slider seat 35, and a guide sleeve 372 is provided on the upper and lower sliders 37, and the guide sleeve 372 is sleeved on the guide column 351; a mounting cavity is provided on the guide column 351, and a reset member 38 is provided in the mounting cavity, and the lower end of the reset member 38 abuts against the bottom of the mounting cavity, and the upper end of the reset member 38 abuts against the top of the guide sleeve 372. In the process of the upper and lower sliders 37 sliding up and down along the slider seat 35, the reset member 38 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 37 can be ensured.

[0053] See also Figures 1 to 4 ,exist Figures 1 to 4In the embodiment of the negative ion generating device shown, a guide block 352 is provided on the guide column 351, a guide groove 373 is provided on the guide sleeve 372, and the guide block 352 is slidably connected in the guide groove 373. In the process of the upper and lower sliders 37 sliding up and down along the slider seat 35, the guide block 352 slides along the guide groove 373, which can ensure the linear movement of the guide column 351 in the guide sleeve 372. At the same time, when the front and rear sliders 36 leave the upper and lower sliders 37 and the reset member 38 is reset, the limit of the guide block 352 can prevent the upper and lower sliders 37 from bouncing off the slider seat 35.

[0054] See also Figures 1 to 4 ,exist Figures 1 to 4 In the embodiment of the negative ion generating device shown, the slider seat 35 is provided with a front and rear slide groove 353, and the front and rear sliders 36 are slidably connected in the front and rear slide grooves 353. When the driving member 32 pushes or pulls the front and rear sliders 36 to slide along the slider seat 35, the front and rear sliders 36 slide along the front and rear slide grooves 353, which may include a linear sliding line of the front and rear sliders 36 along the slider seat 35, so that the second inclined surface on the force applying portion 361 of the front and rear sliders 36 can just act on the first inclined surface of the force receiving portion 371 of the upper and lower sliders 37.

[0055] See also Figure 1 , Figure 2 and Figure 6 The negative ion generating device of the utility model further comprises an air supply device 4, which transports air from the second side of the mounting plate 1 to the first side of the mounting plate 1. When the negative ion generating device is working, the air supply device 4 is started, and the air supply device 4 sucks air from the second side of the mounting plate 1 and transports the air to the first side of the mounting plate 1. The air supply device 4 actively supplies air to the first side of the mounting plate 1, and transports the negative ions generated by the negative ion generator 2 to the first side of the mounting plate 1, which can expand the diffusion distance of the negative ions.

[0056] See also Figure 1 and Figure 2The negative ion generating device of the utility model, the air supply device 4 includes a fan 41 and an air duct 42, one side of the air duct 42 has an air inlet 421, the fan 41 is installed at the air inlet 421, the bottom of the air duct 42 is connected to the second side of the mounting plate 1, and the mounting plate 1 is provided with a plurality of air curtain exhaust holes 14, and the air in the air duct 42 is discharged to the first side of the mounting plate 1 through the air curtain exhaust holes 14. In the negative ion generating device of the utility model, the fan 41 is an axial flow fan, and the wind and the rotating shaft direction of the fan 41 are the same. Under the same power, the axial flow fan has the largest air suction volume and the highest wind speed, but the air supply distance of the axial flow fan is small. Therefore, when the fan 41 adopts the axial flow fan, the air inlet 421 is arranged on the side of the air duct 42; the fan 41 is arranged at the air inlet 421, and the axial flow fan directly draws air through the air inlet 421 and discharges the wind into the air duct 42, and after entering the air duct 42, the wind is discharged downward through the wind curtain exhaust hole 14 to form a wind curtain. After the fan 41 sucks the wind into the air duct 42, it flows along the air duct 42. If the cross-section of the air duct 42 is uniform, since the air volume and wind speed are relatively large on the side close to the air duct 42, after the wind enters the air duct 42, the air volume gradually decreases from the side close to the air duct 42 to the side far away from the air duct 42. The air volume and wind speed of the part of the air duct 42 far away from the fan 41 are the smallest. When the air duct 42 is exhausted downward through the air curtain exhaust hole 14, the wind curtain wind is uneven. The part of the air duct 42 close to the fan 41 has a large air volume and a better effect of blocking oil smoke. The part of the air duct 42 far away from the fan 41 has a thin airflow and a poor effect of blocking oil smoke. Oil smoke can easily escape from the thin airflow of the wind curtain. In order to make the wind curtain formed by the air duct 42 exhausting air downward through the wind curtain exhaust holes 14 have uniform wind speed and air volume in the left and right directions, the cross-section of the air duct 42 gradually decreases from the end close to the fan 41 to the end far away from the fan 41. The air in the air duct 42 forms a uniform wind curtain when it is discharged downward through the wind curtain exhaust holes 14, which has a better effect in blocking oil smoke.

[0057] See also Figure 1 and Figure 2 ,exist Figure 1 and Figure 2 In the embodiment of the negative ion generating device shown, the top surface of the air duct 42 is tilted downward from the end close to the fan 41 to the end far from the fan 41. The part of the air duct 42 closer to the fan 41 has a higher top surface height and a larger cross-sectional area; the part of the air duct 42 farther away from the fan 41 has a lower top surface height and a smaller cross-sectional area. When the airflow in the air duct 42 is discharged through the uniform air hole 15, a uniform air curtain is formed, which has a better effect of blocking oil smoke.

[0058] The negative ion generating device of the utility model, when applied to a range hood, has multiple matching modes between the negative ion generator 2 and the fan 41. When the range hood has a smoke sensor, the fan 41 and the negative ion generator 2 can be linked with the smoke sensor. When the user is cooking, both the fan 41 and the negative ion generator 2 are started, and the fan 41 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 passes through, the negative ions generated by the negative ion generator 2 are driven downward by the wind curtain wind, 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. 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 41 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 exhaust fan is turned off, and sends a signal to the control system of the range hood. When the smoke concentration detected by the smoke sensor 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 When , the control system of the range hood starts the fan 41 and the negative ion generator 2. The fan 41 exhausts air downward to form a wind curtain to prevent the backflow of oil smoke from escaping outward. The negative ion generator 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 start fan 41 and the negative ion generator 2. The smoke exhaust fan works and sucks the air in the environment to discharge the backflow of oil smoke from the environment.

[0059] See also Figures 9 to 13The utility model also discloses a range hood, which adopts the negative ion generating device of the first embodiment described above, including a range hood body 5, the range hood body 5 having a cover plate 51, a top plate 52 and an installation cavity between the cover plate 51 and the top plate 52, the negative ion generating device is arranged in the installation cavity, the top plate 52 is provided with a avoidance opening corresponding to the installation plate 1, an air supply device 4 is also arranged in the installation cavity, the air supply device 4 is installed on the second side of the installation plate 1, the cover plate 51 is provided with an air curtain suction port 511 corresponding to the air supply device 4, the air supply device 4 sucks air from the air curtain suction port 511, and transports the air downward through the installation plate 1. When the user is cooking, the range hood is turned on and operated, and the fan 41 and the negative ion generator 2 are in operation. The wind in the air duct 42 is exhausted downward through the wind curtain exhaust holes 14 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 the user inhaling fumes. When the negative ion generator 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 to the surface of the carbon fiber head 21, and then is 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 41 draws air through the air curtain suction port 511 and exhausts air downward through the air curtain exhaust hole 14, part of the air flows through the gap between the part of the negative ion generator 2 placed in the installation channel 12 and the inner wall surface of the installation channel 12 to form a first air inlet channel to enter the receiving tank 11, and part of the air flows through the second air inlet channel formed by the vent 13 to enter the receiving tank 11, and then is discharged downward from the receiving tank 11, blowing the negative ions in the receiving tank 11 and the negative ions at the emission end of the negative ion generator 2 downward, increasing the diffusion distance of the negative ions. In addition, the negative ion generator 2 generates negative ions by discharging the tip of the carbon fiber head 21 of the negative ion generator 2 to ionize the air, so that the air on the exhaust side of the fan 41 enters the receiving tank 11 through the first air inlet channel and the second air inlet channel, so that the carbon fiber head 21 located in the receiving tank 11 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 tank and is ionized by the carbon fiber head 21, blowing the generated negative ions 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 this range, so that the user has a healthy cooking environment.

[0060] See also Figures 9 to 13 ,exist Figures 9 to 13In the embodiment of the range hood shown, two groups of negative ion generating devices are arranged in the installation cavity, the mounting plates 1 of the two groups of negative ion generating devices are arranged along the width direction of the top plate 52, the fans 41 of the two groups of negative ion generating devices are arranged on the side of the air duct 42 close to each other, and the parts of the cover plate 51 corresponding to the two groups of negative ion generating devices are provided with air curtain suction ports 511. 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, the fans 41 of the two groups of negative ion generating devices and the negative ion generator 2 are running, the fans 41 suck air through the air curtain suction ports 511 and exhaust air into the air duct 42, the air flow in the air duct 42 flows along the air duct 42 and is discharged downward through the uniform air curtain exhaust holes 14, in the process of the air in the air duct 42 being discharged downward through the air curtain exhaust holes, the air enters the containing groove 11 through the first air inlet channel and the second air inlet channel, and the negative ions generated by the negative ion generator 2 are blown downward, forming air curtains containing negative ions on both sides of the range hood, which has a better effect of blocking and purifying oil smoke.

[0061] The utility model also discloses another range hood. In this embodiment, the range hood adopts the negative ion generating device of the second embodiment. Except for the different way in which the driving component 3 drives the negative ion generator 2 to extend and retract, the other ways are the same as the structure and function of the range hood adopting the first embodiment. In order to make the text brief, they are not repeated here.

[0062] 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 mounting plate (1) having a receiving groove (11) formed thereon, the opening of the receiving groove (11) facing the first side of the mounting plate (1), and a mounting channel (12) penetrating the receiving groove (11) being formed at the bottom of the receiving groove (11); A negative ion generator (2), the emission end of which passes through the installation channel (12) and extends into the containing groove (11); a gap between the portion of the negative ion generator (2) placed in the installation channel (12) and the inner wall surface of the installation channel (12) forms a first air inlet channel; air flowing from the second side of the installation plate (1) to the first side of the installation plate (1) can enter the containing groove (11) through the first air inlet channel and flow in a direction away from the first side of the installation plate (1); A driving component (3) is arranged on the mounting plate (1) and is used to drive the emission end of the negative ion generator (2) to extend from the containing groove (11) or retract into the containing groove (11).

2. The negative ion generating device according to claim 1, characterized in that: When the driving component (3) drives the emitting end of the negative ion generator (2) to extend out of the containing groove (11), the distance by which the emitting end of the negative ion generator (2) extends out of the first side of the mounting plate (1) is x, and the head diameter of the emitting end of the negative ion generator (2) is D1, where x≥D1.

3. The negative ion generating device according to claim 2, characterized in that: The head diameter of the emission end of the negative ion generator (2) is D1, and the lower edge diameter of the containing groove (11) is D2, where D2≥5mm>D1, and 2mm<D1<5mm.

4. The negative ion generating device according to claim 1, characterized in that: A vent hole (13) is provided at the top of the accommodating groove (11), and the vent hole (13) is connected to a channel of the accommodating groove (11) to form a second air inlet channel, so that air on the second side of the mounting plate (1) can enter the accommodating groove (11) through the first air inlet channel and the second air inlet channel and flow from the accommodating groove (11) in a direction away from the first side of the mounting plate (1).

5. The negative ion generating device according to claim 4, characterized in that: The head diameter of the emission end of the negative ion generator (2) is D1, the lower edge diameter of the containing groove (11) is D2, D2 ≥ 5 mm, 2 mm < D1 < 5 mm, and the diameter of the ventilation hole (13) is D3, 1 mm ≤ D3 ≤ (D2-D1) / 2.

6. The negative ion generating device according to claim 1, characterized in that: The driving assembly (3) comprises a driving box (31), a driving member (32), a gear (33) and a rack (34); the driving member (32) is arranged on the driving box (31); the gear (33) is rotatably connected to the driving box (31) and is connected to a driving end of the driving member (32); the rack (34) is slidably connected to the driving box (31) and is meshed with the gear (33); the negative ion generator (2) is arranged on the rack (34), and an emission end thereof passes through the installation channel (12) and extends into the accommodating groove (11).

7. The negative ion generating device according to claim 1, characterized in that: The driving assembly (3) comprises a driving member (32), a slider seat (35), a front and rear slider (36), an upper and lower slider (37) and a reset member (38); the front and rear slider (36) is connected to the slider seat (35) in a front-rear sliding manner; the upper and lower slider (37) is connected to the slider seat (35) in an up-and-down sliding manner; the reset member (38) is arranged between the slider seat (35) and the upper and lower slider (37); a driving end of the driving member (32) is connected to the front and rear sliders (36); the driving member (32) The front and rear sliders (36) are driven to move forward, so that the front and rear sliders (36) act on the upper and lower sliders (37), drive the upper and lower sliders (37) to move downward and compress the reset member (38); or the driving member (32) drives the front and rear sliders (36) to move backward, so that the front and rear sliders (36) leave the upper and lower sliders (37), the reset member (38) is reset and drives the upper and lower sliders (37) to move upward; the negative ion generator (2) is arranged on the upper and lower sliders (37).

8. The negative ion generating device according to claim 1, characterized in that: It also comprises an air supply device (4), wherein the air supply device (4) supplies air from the second side of the mounting plate (1) to the first side of the mounting plate (1).

9. The negative ion generating device according to claim 8, characterized in that: The air supply device (4) comprises a fan (41) and an air duct (42); one side of the air duct (42) is provided with an air inlet (421); the fan (41) is installed at the air inlet (421); the bottom of the air duct (42) is connected to the second side of the mounting plate (1); a plurality of air curtain exhaust holes (14) are provided on the mounting plate (1); the air in the air duct (42) is discharged to the first side of the mounting plate (1) through the air curtain exhaust holes (14).

10. A range hood, using the negative ion generating device according to any one of claims 1 to 9, characterized in that: The range hood body (5) comprises a cover plate (51), a top plate (52) and a mounting cavity located between the cover plate (51) and the top plate (52); the negative ion generating device is arranged in the mounting cavity; the top plate (52) is provided with a avoidance opening corresponding to the mounting plate (1); an air supply device (4) is also arranged in the mounting cavity; the air supply device (4) is installed on the second side of the mounting plate (1); the cover plate (51) is provided with an air curtain suction port (511) corresponding to the air supply device (4); the air supply device (4) sucks air from the air curtain suction port (511) and transports the air downward through the mounting plate (1).

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