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 cyclone engine lower cover which is provided with an electromagnetic relay module; the sliding block assembly comprises a sliding block and a sliding block reset piece, the sliding block is connected with the lower cover of the cyclone engine in a sliding mode, the sliding block reset piece is arranged between the sliding block and the lower cover of the cyclone engine, and a magnet is arranged at the position, corresponding to the electromagnetic relay module, of the sliding block; the negative ion generator is connected with the sliding block; compared with the prior art, when the negative ion generating device and the electromagnetic relay module are electrified, magnetic attraction force is generated on the magnet, so that the sliding block slides along the lower cover of the cyclone engine, and after the magnet and the electromagnetic relay module are magnetically attracted, the negative ion generator extends out of the lower surface of the lower cover of the cyclone engine and is started; air flow on the upper side of the cyclone engine lower cover flows towards the lower side of the cyclone engine lower cover and blows negative ions generated by the negative ion generator, so that the diffusion distance of the negative ions is increased.

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 cyclone engine lower cover, on which an electromagnetic relay module is provided;

[0006] A slider assembly, comprising a slider and a slider reset member, wherein the slider is slidably connected to the cyclone engine lower cover, the slider reset member is disposed between the slider and the cyclone engine lower cover, and a magnet is disposed at a position on the slider corresponding to the electromagnetic relay module;

[0007] The negative ion generator is connected to the slider and can move with the slider and extend under the lower cover of the cyclone engine when the electromagnetic relay module is energized.

[0008] According to one embodiment of the utility model, a mounting channel and a mounting groove are provided on the lower cover of the cyclone engine, a slider is slidably connected in the mounting groove, a negative ion generator is connected to the slider, and an emission end thereof is slidably connected in the mounting channel.

[0009] According to an embodiment of the present invention, the slider reset member is placed in the mounting groove and below the slider.

[0010] According to one embodiment of the utility model, a guide column is provided in the lower cover of the cyclone engine, a guide sleeve corresponding to the guide column is provided on the slider, the guide column is sleeved in the guide sleeve, the slider reset member is installed in the cavity of the guide column, and its upper end abuts against the top surface of the guide sleeve.

[0011] According to an embodiment of the utility model, a guide block is provided on the guide column, a guide groove is provided on the wall surface of the guide sleeve, and the guide block is slidably connected in the guide groove.

[0012] According to one embodiment of the utility model, a connecting portion is provided on the slider, a negative ion generator is provided on the connecting portion, a side wall of the installation groove is provided with a avoidance opening corresponding to the connecting portion, and a mounting channel is provided on the side of the cyclone engine lower cover corresponding to the avoidance opening.

[0013] According to one embodiment of the utility model, a plurality of air curtain exhaust holes are provided at the bottom of the lower cover of the cyclone engine, and the installation channel runs through one of the air curtain exhaust holes.

[0014] 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, and the top plate is provided with an avoidance opening corresponding to the lower cover of the cyclone engine.

[0015] According to one embodiment of the utility model, an air supply device is also provided in the installation cavity, and the air supply device is installed on the lower cover of the cyclone engine. A wind curtain air suction port corresponding to the air supply device is provided on the cover plate. The air supply device sucks air from the wind curtain air suction port and transports the air downward through the lower cover of the cyclone engine.

[0016] According to one embodiment of the utility model, the air supply device is a cross-flow fan, a wind curtain duct is provided on the lower cover of the cyclone engine, a slider assembly is provided in the wind curtain duct, the cross-flow fan is provided on the lower cover of the cyclone engine, and its exhaust side is sealed in the wind curtain duct. The cross-flow fan sucks air and exhausts air to the bottom of the lower cover of the cyclone engine through the wind curtain duct.

[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 started, the electromagnetic relay module is energized, and the electromagnetic relay module generates a magnetic attraction force on the magnet. Under the action of the magnetic attraction force of the electromagnetic relay module, the slider slides along the cyclone engine lower cover, so that the magnet and the electromagnetic relay module are magnetically attracted together and compress the slider reset part. In the process of the magnet approaching the electromagnetic relay module with the slider, the negative ion generator moves with the slider and extends to the lower surface of the cyclone engine lower cover. Thereafter, the negative ion generator is started and generates negative ions. In the process of the negative ion generator generating negative ions, the airflow on the upper side of the cyclone engine lower cover flows to the lower side of the cyclone engine lower cover, and the airflow blows the negative ions generated by the negative ion generator, thereby increasing the diffusion distance of the negative ions. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is an exploded view of the negative ion generating device of the utility model;

[0020] Figure 2 It is a structural schematic diagram of the lower cover of the cyclone engine of the negative ion generating device of the utility model;

[0021] Figure 3 A bottom view of the lower cover of the cyclone engine of the negative ion generating device of the utility model;

[0022] Figure 4 An exploded view of a negative ion generator of the negative ion generating device of the utility model;

[0023] Figure 5 The exploded view of a range hood having the negative ion generating device of the utility model;

[0024] Figure 6 It is a cross-sectional view of a range hood having a negative ion generating device of the utility model (the generating end of the negative ion generator does not extend below the lower cover of the cyclone engine);

[0025] Figure 7 for Figure 6 A magnified view of middle;

[0026] In the figure: 1. cyclone engine lower cover, 11. electromagnetic relay module, 12. installation channel, 13. installation groove, 131. guide column, 1311. guide block, 14. wind curtain exhaust hole, 15. wind curtain air duct, 2. slider assembly, 21. slider, 211. guide sleeve, 2111. guide groove, 212. connecting part, 22. slider reset part, 23. magnet, 3. negative ion generator, 31. carbon fiber head, 32. metal cladding, 33. wire, 4. air supply device, 5. range hood body, 51. cover plate, 511. wind curtain air inlet, 52. top plate.

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

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

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

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

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

[0032] See also Figures 1 to 3The utility model discloses a negative ion generating device, which is used for a range hood, and includes a cyclone engine lower cover 1, a slider assembly 2 and a negative ion generator 3. The cyclone engine lower cover 1 is provided with an electromagnetic relay module 11; the slider assembly 2 includes a slider 21 and a slider reset member 22, the slider 21 is slidably connected to the cyclone engine lower cover 1, the slider reset member 22 is arranged between the slider 21 and the cyclone engine lower cover 1, and a magnet 23 is arranged at a position on the slider 21 corresponding to the electromagnetic relay module 11; the negative ion generator 3 is connected to the slider 21, and can move with the slider 21 and extend to the bottom of the cyclone engine lower cover 1 when the electromagnetic relay module 11 is powered on. When the negative ion generating device of the utility model is started, the electromagnetic relay module 11 is energized, and the electromagnetic relay module 11 generates a magnetic attraction force on the magnet 23. Under the action of the magnetic attraction force of the electromagnetic relay module 11, the slider 21 slides along the cyclone engine lower cover 1, so that the magnet 23 and the electromagnetic relay module 11 are magnetically attracted together and compress the slider reset member 22. In the process that the magnet 23 approaches the electromagnetic relay module 11 with the slider 21, the negative ion generator 3 moves with the slider 21 and extends to the lower surface of the cyclone engine lower cover 1. Thereafter, the negative ion generator 3 is started and generates negative ions. In the process of the negative ion generator 3 generating negative ions, the airflow on the upper side of the cyclone engine lower cover 1 flows to the lower side of the cyclone engine lower cover 1, and the airflow blows the negative ions generated by the negative ion generator 3, so that the diffusion distance of the negative ions becomes larger. After the negative ion generating device of the present invention is applied to the range hood, when the user performs cooking operations, the user starts the range hood, the electromagnetic relay module 11 is energized and generates a magnetic attraction force on the magnet 23, and under the action of the magnetic attraction force, the slider 21 slides downward along the cyclone engine lower cover 1, and drives the negative ion generator 3 to move downward, and the emitting end of the negative ion generator 3 begins to extend toward the lower surface of the cyclone engine lower cover 1. After the magnet 23 and the electromagnetic relay module 11 are magnetically attracted together, the negative ion generator 3 extends into place, and then the negative ion generator 3 starts and generates negative ions, and the airflow on the upper side of the cyclone engine lower cover 1 flows toward the lower side of the cyclone engine lower cover 1 through the air, blowing the negative ions downward, and the diffusion range of the negative ions generated by the negative ion generator 3 covers the corresponding position of 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 smoker is turned off, the electromagnetic relay module 11 is powered off, the slider reset member 22 is reset and pushes the slider 21 to move upward along the cyclone engine lower cover 1, and the emitting end of the negative ion generator 3 is retracted to above the lower surface of the cyclone engine lower cover 1, which can prevent oil and dust from adhering to the emitting end of the negative ion generator 3 and affecting the generation of negative ions by the negative ion generator 3.

[0033] See also Figure 4The negative ion generator 3 of the utility model includes a carbon fiber head 31 and a metal cladding 32. The metal cladding 32 wraps one end of the carbon fiber head 31. The metal cladding 32 is connected to a high-voltage package through a wire 33, and the high-voltage package is connected to the circuit board of the range hood. When the negative ion generator 3 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 32 through the wire 33. The current transmitted to the metal cladding 32 is transmitted along the metal cladding 32 and transmitted to the surface of the carbon fiber head 31, and then transmitted along the surface of the carbon fiber head 31 to the tip of the carbon fiber head 31. The tip of the carbon fiber head 31 discharges, ionizes the air and generates negative ions. The tip of the carbon fiber head 31 is one end away from the metal cladding 32, so that the negative ions generated by the discharge of the tip of the carbon fiber head 31 are not easily extinguished by the metal cladding 32.

[0034] In the negative ion generating device of the utility model, at least the tip of the carbon fiber head 31 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 31 transfers the adsorbed water molecules to the surface of the carbon fiber head 31 through the hydrophilic effect of the surface of the carbon fiber head 31, and then transfers them to the top of the carbon fiber head 31 by using the water absorption and capillary action of the carbon fiber head 31, and enriches at the tip of the carbon fiber head 31, and then generates negative oxygen ions under voltage.

[0035] In the negative ion generating device of the utility model, the resistance at the metal cladding 32 is R1, the resistance at the tip of the metal cladding 32 connecting one end of the wire 33 to the carbon fiber head 31 is R2, the resistance at the wire 33 is R3, and the resistance at the part of the metal cladding 32 connecting one end of the wire 33 to the middle of the carbon fiber head 31 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 31 is the smallest, and the voltage flowing therethrough is the largest. When the tip of the carbon fiber head 31 is discharged, more negative ions are generated by ionizing the air.

[0036] See also Figure 2 and Figure 3In the negative ion generating device of the present invention, a mounting channel 12 and a mounting groove 13 are provided on the lower cover 1 of the cyclone engine, a slider 21 is slidably connected in the mounting groove 13, a negative ion generator 3 is connected to the slider 21, and its emission end is slidably connected in the mounting channel 12. When the electromagnetic relay module 11 is powered on, the electromagnetic relay module 11 magnetically attracts the magnet 23, the slider 21 slides along the mounting groove 13, and compresses the slider reset member 22. The mounting groove 13 can guide the slider 21 so that the slider 21 can only slide up and down relative to the mounting groove 13; in the process of the slider 21 moving downward along the mounting groove 13, the negative ion generator 3 moves with the slider 21, and the negative ion generator 3 slides along the mounting channel 12 and extends downward to the lower surface of the cyclone engine lower cover 1; when the electromagnetic relay module 11 is powered off, the magnetism of the electromagnetic relay module 11 disappears, and no longer generates magnetic attraction to the magnet 23, the slider 21 no longer generates pressure on the slider reset member 22, the slider reset member 22 resets and lifts the slider 21 upward along the mounting groove 13, the negative ion generator 3 moves upward with the slider 21, and its emitting end retracts above the lower surface of the cyclone engine lower cover 1.

[0037] In the negative ion generating device of the present invention, the slider reset member 22 is placed in the mounting groove 13 and below the slider 21. Since the mounting groove 13 limits the moving direction of the slider 21, the slider 21 can only move up and down in the mounting groove 13. The slider reset member 22 is arranged in the mounting groove 13, which can reduce the occupied position of the slider assembly 2 on the lower cover 1 of the cyclone engine.

[0038] See also Figures 1 to 3 In the negative ion generating device of the utility model, a guide column 131 is provided in the lower cover 1 of the cyclone engine, a guide sleeve 211 corresponding to the guide column 131 is provided on the slider 21, the guide column 131 is sleeved in the guide sleeve 211, and the slider reset member 22 is installed in the cavity of the guide column 131, and its upper end abuts against the top surface of the guide sleeve 211. In the process of the slider 21 sliding up and down along the mounting groove 13, the slider reset member 22 can only expand and contract up and down in the cavity, and cannot be twisted and deformed. The force of the slider reset member 22 on the slider 21 is always in the vertical direction, which can ensure the linear movement of the slider 21.

[0039] See also Figures 1 to 3 In the negative ion generating device of the utility model, a guide block 1311 is provided on the guide column 131, a guide groove 2111 is provided on the wall surface of the guide sleeve 211, and the guide block 1311 is slidably connected in the guide groove 2111. When the slider 21 slides up and down along the installation groove 13, the guide block 1311 slides along the guide groove 2111, which can ensure the linear movement of the guide column 131 in the guide sleeve 211. At the same time, when the electromagnetic relay module 11 is powered off and loses its magnetic attraction to the magnet 23, when the slider reset member 22 is reset, the limit of the guide block 1311 can prevent the slider 21 from popping out of the installation groove 13.

[0040] See also Figures 1 to 3 In the negative ion generating device of the utility model, a connecting portion 212 is provided on the slider 21, and the negative ion generator 3 is arranged on the connecting portion 212. A side wall of the mounting groove 13 is provided with an avoidance port corresponding to the connecting portion 212, and a mounting channel 12 is provided on the side corresponding to the avoidance port of the cyclone engine lower cover 1. When the electromagnetic relay module 11 is powered on, the electromagnetic relay module 11 generates a magnetic attraction force on the magnet 23, and the magnet 23 drives the slider 21 to move in the direction of the electromagnetic relay module 11. The slider 21 slides downward along the mounting groove 13, and the connecting portion 212 slides downward with the slider 21. The notch on the side wall of the mounting groove 13 will not interfere with the downward sliding of the connecting portion 212. In the process of the connecting portion 212 sliding downward, the negative ion generator 3 slides downward along the mounting channel 12, and its generating end extends out of the lower surface of the cyclone engine lower cover 1.

[0041] See also Figure 2 and Figure 3 In the negative ion generating device of the utility model, a plurality of air curtain exhaust holes 14 are provided at the bottom of the cyclone engine lower cover 1, and the installation channel 12 runs through one of the air curtain exhaust holes 14. When the negative ion generating device is started, an airflow will flow through the upper side of the cyclone engine lower cover 1 through the air curtain exhaust holes 14 to the lower side of the cyclone engine lower cover 1. When the airflow flows through the air curtain exhaust holes 14 through the installation channel 12, the airflow blows the negative ions generated by the negative ion generator 3 downward, so that the diffusion distance of the negative ions becomes larger; in addition, when the airflow on the upper side of the cyclone engine lower cover 1 flows toward the lower side of the cyclone lower cover 1 through the air curtain exhaust holes 14, a wind curtain will be formed. When the negative ions diffuse downward, they flow downward with the wind curtain. When the negative ion generating device is applied to the range hood, the negative ions in the wind curtain can purify the oil smoke escaping outward through the wind curtain, providing users with a healthy cooking environment.

[0042] See also Figures 5 to 7The utility model also discloses a range hood, which adopts the above-mentioned negative ion generating device, including a range hood body 5, the range hood body 5 has a cover plate 51, a top plate 52 and an installation cavity located between the cover plate 51 and the top plate 52, the negative ion generating device is arranged in the installation cavity, and the top plate 52 is provided with an avoidance opening corresponding to the cyclone engine lower cover 1. When the user is cooking, the range hood is turned on and the negative ion generating device is started, the electromagnetic relay module 11 is energized, the electromagnetic relay module 11 sucks the magnet 23 downward, the magnet 23 drives the slider 21 to move downward along the mounting slot 13, the emitting end of the negative ion generator 3 extends to the lower surface of the cyclone engine lower cover 1, the negative ion generator 3 is running, the airflow on the upper side of the cyclone engine lower cover 1 flows downward through the wind curtain exhaust hole 14 and forms a wind curtain, the wind curtain can to a certain extent block the fumes produced by cooking from escaping outward when flowing to the air intake of the range hood, reducing the possibility of users inhaling fumes; when the negative ion generator 3 is running, the circuit board connects the high-voltage package to the circuit, the current of the high-voltage package is transmitted to the metal cladding 32 through the wire 33, the current transmitted to the metal cladding 32 is transmitted along the metal cladding 32, and is transmitted to the surface of the carbon fiber head 31, and then is transported along the surface of the carbon fiber head 31 to the tip of the carbon fiber head 31, the tip of the carbon fiber head 31 discharges, ionizes the air and generates negative ions. During the process of generating negative ions, when the airflow on the upper side of the cyclone engine lower cover 1 is exhausted downward through the wind curtain exhaust hole 14, part of the air is discharged downward through the air intake channel formed by the gap between the part of the negative ion generator 3 placed in the installation channel 12 and the inner wall surface of the installation channel 12, and the negative ions in the installation channel 12 and the negative ions at the emission end of the negative ion generator 3 are blown downward to increase the diffusion distance of the negative ions. After the negative ions are generated, new air enters the installation channel 12, and while being ionized by the carbon fiber head 31, 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 this range, so that the user has a healthy cooking environment.

[0043] See also Figures 5 to 7In the smoke exhaust fan of the utility model, an air supply device 4 is also provided in the installation cavity. The air supply device 4 is installed on the lower cover 1 of the cyclone engine. The cover plate 51 is provided with a wind curtain air inlet 511 corresponding to the air supply device 4. The air supply device 4 sucks air from the wind curtain air inlet 511 and transmits the air downward through the lower cover 1 of the cyclone engine. When the negative ion generating device is working, the air supply device 4 is started, and the air supply device sucks air through the wind curtain air inlet 511 and discharges air downward through the wind curtain air outlet 14. Part of the air is discharged downward through the air channel formed by the gap between the part of the negative ion generator 3 placed in the installation channel 12 and the inner wall surface of the installation channel 12, and the negative ions in the installation channel 12 and the negative ions at the emission end of the negative ion generator 3 are blown downward, thereby increasing the diffusion distance of the negative ions. After the negative ions are generated, new air enters the installation channel 12, and while being ionized by the carbon fiber head 31, the negative ions generated by the ionization are blown downward, so that the negative ions can move to the inhalation range corresponding to the user's mouth and nose, and purify the air in this range, so that the user has a healthy cooking environment.

[0044] See also Figure 5 In the negative ion generating device of the utility model, the air supply device 4 is a cross-flow fan, a wind curtain duct 15 is provided on the lower cover 1 of the cyclone engine, the slider assembly 2 is arranged in the wind curtain duct 15, the cross-flow fan is arranged on the lower cover 1 of the cyclone engine, and its exhaust side is sealed in the wind curtain duct 15. The cross-flow fan sucks air and exhausts air to the bottom of the lower cover 1 of the cyclone engine through the wind curtain duct 15. When the air supply device 4 is started, the air outside the installation cavity enters the installation cavity through the wind curtain air suction port 511. Under the action of the cross-flow fan, the wind comes in from the blades of the cross-flow fan, leaves the blades and enters the wind curtain duct 15, and then flows along the wind curtain duct 15 and is discharged downward through the wind curtain exhaust hole 14. The noise is low, which can improve the user experience.

[0045] See also Figure 5 The negative ion generating device of the utility model has two groups of negative ion generating devices arranged in the installation cavity. The lower cover 1 of the cyclone engine of the two groups of negative ion generating devices is arranged along the width direction of the top plate 52. Each group of negative ion generating devices has an air supply device 4 cooperating therewith. The portion of the cover plate 51 corresponding to each group of air supply devices 4 is provided with a wind curtain air suction port 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 air supply device 4 and the negative ion generator 3 are running, the air supply device 4 discharges air into the wind curtain duct 15, the air in the wind curtain duct 15 flows along the wind curtain duct 15 and is discharged downward through the uniform wind curtain exhaust hole 14. In the process of the air in the wind curtain duct 15 being discharged downward through the wind curtain exhaust hole 14, part of the air is discharged downward through the installation channel 12, and the negative ions generated by the negative ion generator 3 are blown downward, forming a wind curtain containing negative ions on both sides of the range hood, which has a better effect of blocking and purifying oil smoke.

[0046] In the range hood of the utility model, the negative ion generator 3 of the negative ion generating device and the air supply device 4 can cooperate in a variety of ways. When the range hood has a smoke sensor, the air supply device 4 and the negative ion generator 3 can be linked with the smoke sensor. When the user is cooking, the air supply device 4 and the negative ion generator 3 are both started, and the air supply device 4 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 3 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 escaping fumes. When flowing downward with the wind curtain wind, it 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 completes the cooking operation, the exhaust fan of the range hood is turned off, the air supply device 4 and the negative ion generator 3 are turned off, and the smoke sensor is started, and the smoke sensor monitors the backflow of fumes. 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 3. 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 3, so that the kitchen air can be cleaned; when the smoke sensor detects that the concentration of oil smoke is greater than c and less than b, The control system of the range hood starts the air supply device 4 and the negative ion generator 3. The air supply device 4 exhausts air downward to form a wind curtain to prevent the backflow of oil smoke from escaping outward. The negative ion generator 3 generates negative ions, which flow downward with the wind of the wind curtain and diffuse in the wind of the wind curtain 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 air supply device 4 and the negative ion generator 3. The smoke exhaust fan works and sucks the air in the environment to discharge the backflow of oil smoke from the environment.

[0047] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions or improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A negative ion generating device for a range hood, characterized in that: include: A cyclone engine lower cover (1) on which an electromagnetic relay module (11) is provided; A slider assembly (2), comprising a slider (21) and a slider reset member (22), wherein the slider (21) is slidably connected to the cyclone engine lower cover (1), the slider reset member (22) is disposed between the slider (21) and the cyclone engine lower cover (1), and a magnet (23) is disposed at a position on the slider (21) corresponding to the electromagnetic relay module (11); A negative ion generator (3) is connected to the slider (21) and can move with the slider (21) and extend below the cyclone engine lower cover (1) when the electromagnetic relay module (11) is powered on.

2. The negative ion generating device according to claim 1, characterized in that: The cyclone engine lower cover (1) is provided with a mounting channel (12) and a mounting groove (13); the slider (21) is slidably connected in the mounting groove (13); the negative ion generator (3) is connected to the slider (21), and its emission end is slidably connected in the mounting channel (12).

3. The negative ion generating device according to claim 2, characterized in that: The slider reset member (22) is placed in the mounting groove (13) and is located below the slider (21).

4. The negative ion generating device according to claim 1, characterized in that: A guide column (131) is provided in the cyclone engine lower cover (1), a guide sleeve (211) corresponding to the guide column (131) is provided on the slider (21), the guide column (131) is sleeved in the guide sleeve (211), and the slider reset member (22) is installed in the cavity of the guide column (131), with the upper end thereof abutting against the top surface of the guide sleeve (211).

5. The negative ion generating device according to claim 4, characterized in that: A guide block (1311) is provided on the guide column (131), a guide groove (2111) is provided on the wall surface of the guide sleeve (211), and the guide block (1311) is slidably connected in the guide groove (2111).

6. The negative ion generating device according to claim 2, characterized in that: The slider (21) is provided with a connecting portion (212), the negative ion generator (3) is arranged on the connecting portion (212), a side wall surface of the installation groove (13) is provided with a avoidance opening corresponding to the connecting portion (212), and the side of the cyclone engine lower cover (1) corresponding to the avoidance opening is provided with the installation channel (12).

7. The negative ion generating device according to claim 2, characterized in that: A plurality of wind curtain exhaust holes (14) are provided at the bottom of the cyclone engine lower cover (1), and the installation channel (12) passes through one of the wind curtain exhaust holes (14).

8. A range hood, using the negative ion generating device according to any one of claims 1 to 7, 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; and the top plate (52) is provided with a relief opening corresponding to the lower cover (1) of the cyclone engine.

9. The range hood according to claim 8, characterized in that: An air supply device (4) is also provided in the installation cavity. The air supply device (4) is installed on the cyclone engine lower cover (1). The cover plate (51) is provided with a wind curtain air suction port (511) corresponding to the air supply device (4). The air supply device (4) draws air from the wind curtain air suction port (511) and transports the air downward through the cyclone engine lower cover (1).

10. The range hood according to claim 9, characterized in that: The air supply device (4) is a cross-flow fan. A wind curtain duct (15) is provided on the cyclone engine lower cover (1). The slider assembly (2) is arranged in the wind curtain duct (15). The cross-flow fan is arranged on the cyclone engine lower cover (1), and its exhaust side is sealed in the wind curtain duct (15). The cross-flow fan sucks air and exhausts air to the bottom of the cyclone engine lower cover (1) through the wind curtain duct (15).

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