Range hood

Abstract

The utility model relates to the technical field of kitchen utensils, in particular to a range hood. Comprising a range hood main body and a negative ion assembly, the range hood main body comprises an air curtain assembly, a range hood shell and an oil smoke channel, the range hood shell is provided with an air suction opening, the air suction opening is communicated with the oil smoke channel, and the air curtain assembly is detachably installed on the range hood shell and located at the top of the air suction opening; the negative ion assembly is provided with a first negative ion emission head and a second negative ion emission head, the installation end of the first negative ion emission head is detachably installed on the air curtain assembly, and the free end of the first negative ion emission head is located on the side close to the air suction opening. The installation end of the second anion emission head is detachably installed in the range hood shell, and the free end of the second anion emission head is located in the oil smoke channel. The utility model aims to solve the problem that the existing range hood is easy to cause smoke leakage, so that oil smoke and peculiar smell appear in a kitchen.

Description

Technical Field

[0001] The utility model relates to the technical field of kitchen appliances, in particular to a range hood. Background Art

[0002] The existing range hood is arranged above the kitchen stove and is used to extract the oil smoke from the kitchen to the outside through the volute component in the range hood when the user cooks food.

[0003] At present, during the operation of the range hood, the blades of the impeller in the range hood continuously work on the air, and the grease in the oil smoke also continuously contaminates the surface of the oil smoke duct. As the grease accumulates, the oil smoke adheres to the surface of the oil smoke duct, gradually leading to a decrease in the suction air volume and a slowdown in the oil smoke air flow rate, which will affect the oil smoke extraction effect of the range hood, making the existing range hood unable to cleanly absorb a small amount of oil smoke, and the range hood is prone to smoke leakage, which causes oil smoke odor in the kitchen. Utility Model Content

[0004] The purpose of the utility model is to provide a range hood for solving the problem that the existing range hoods cannot completely absorb a small amount of oil smoke, the range hoods are prone to smoke leakage, and the kitchen has an oil smoke odor.

[0005] To achieve the above-mentioned purpose, the present invention adopts the following technical solution: a range hood, comprising:

[0006] The range hood body comprises an air curtain assembly, a range hood housing, and an oil fume duct. The range hood housing is provided with an air suction port, the air suction port being in communication with the oil fume duct. The air curtain assembly is detachably mounted on the range hood housing and is located on top of the air suction port.

[0007] A negative ion component, wherein the negative ion component has a first negative ion emitter head and a second negative ion emitter head, the mounting end of the first negative ion emitter head is detachably mounted on the wind curtain assembly, the free end of the first negative ion emitter head is located on the side close to the air intake port, the mounting end of the second negative ion emitter head is detachably mounted in the range hood housing, and the free end of the second negative ion emitter head is located in the oil fume channel.

[0008] According to one embodiment of the present invention, the first negative ion emitter head and the second negative ion emitter head are both wrapped with carbon filaments, and the negative ion assembly further includes a plurality of fixed brackets, and the mounting end of each of the first negative ion emitter heads is mounted on the air curtain assembly through each of the fixed brackets, and the mounting end of each of the second negative ion emitter heads is mounted in the range hood housing through each of the fixed brackets.

[0009] According to one embodiment of the present invention, the free end of the first negative ion emitter is perpendicular to or faces the flow direction of the airflow at the air inlet, and the free end of the second negative ion emitter is perpendicular to or faces the flow direction of the airflow in the oil fume channel.

[0010] According to one embodiment of the present invention, a plurality of first negative ion emission heads are provided, and the mounting ends of the plurality of first negative ion emission heads can be detachably mounted in the air duct of the air curtain assembly.

[0011] According to one embodiment of the present invention, the range hood body further includes a bellows, a fan, a smoke exhaust pipe, a baffle and an oil cup;

[0012] The bellows is detachably mounted on the top of the range hood housing, and the blower is detachably mounted in the bellows. When the blower is in a closed state, the second negative ion emitter is in an operating state.

[0013] The smoke exhaust pipe is detachably mounted on the top of the bellows. Two baffles are provided, which are respectively mounted on the left and right sides of the range hood housing. The oil cup is detachably mounted on the bottom of the range hood housing.

[0014] According to one embodiment of the present invention, a plurality of second negative ion emitter heads are provided, and the free ends of the plurality of second negative ion emitter heads are all located in the oil fume channel, and the second negative ion emitter head is detachably installed at at least one position of the bellows, the exhaust port of the fan and the exhaust pipe.

[0015] According to one embodiment of the present invention, a negative ion circuit is further included, wherein the negative ion circuit is electrically connected to the negative ion generator of the negative ion component, and the first negative ion emission head and the second negative ion emission head are electrically connected to the negative ion circuit respectively.

[0016] According to one embodiment of the present utility model, the negative ion circuit includes a filter circuit and a transient suppression diode, the voltage output end of the filter circuit is electrically connected to the voltage input end of the transient suppression diode, and the voltage output end of the transient suppression diode is electrically connected to the voltage input end of the negative ion generator of the negative ion component.

[0017] According to one embodiment of the present invention, the negative ion circuit further includes a switching circuit and a comparison circuit;

[0018] The voltage input end of the switching circuit is electrically connected to the voltage output end of the negative ion generator of the negative ion component, and the voltage output end of the switching circuit is electrically connected to the voltage input end of the comparison circuit;

[0019] The first negative ion emitting head and the second negative ion emitting head are both electrically connected to the output end of the comparison circuit.

[0020] According to one embodiment of the present invention, the negative ion circuit further includes a power supply anti-reverse connection circuit, and the first negative ion emission head and the second negative ion emission head are both electrically connected to the power supply anti-reverse connection circuit.

[0021] Compared with the prior art, the range hood of the present invention has the following advantages:

[0022] The utility model provides a range hood, through the arrangement of the range hood main body and the negative ion component. During the installation of the range hood, the first negative ion emitting head is installed on the air curtain component, and the second negative ion emitting head is installed in the oil fume duct in the range hood housing. During the use of the range hood, oil fume is sucked into the air intake port, the air curtain component and the negative ion component are started, and the first negative ion emitting head emits negative ions to adsorb the oil fume at the air intake port; at the same time, the negative ions emitted by the second negative ion emitting head adsorb and inhibit bacteria on the oil fume in the oil fume duct, thereby reducing the accumulation of oil fume in the oil fume duct, improving the exhaust efficiency of the oil fume in the oil fume duct, and thus reducing the occurrence of oil fume odor in the kitchen. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific embodiments of the present invention, the following briefly introduces the drawings required for use in the specific embodiments. In all the drawings, each element or part is not necessarily drawn according to the actual scale.

[0024] Figure 1 This is a structural diagram of a range hood according to the present invention;

[0025] Figure 2 This is a side sectional view of a range hood according to the present invention;

[0026] Figure 3 This is a structural diagram of an air curtain assembly in a range hood according to the present invention;

[0027] Figure 4 This is a structural diagram of an air box in a range hood of the present utility model;

[0028] Figure 5 This is a schematic structural diagram of a fan in a range hood according to the present invention;

[0029] Figure 6 This is a schematic structural diagram of a smoke exhaust pipe in a range hood according to the present invention;

[0030] Figure 7 This is a schematic structural diagram of a negative ion component in a range hood of the present invention;

[0031] Figure 8 This is a circuit diagram of a negative ion circuit in a range hood according to the present invention;

[0032] In the figure: range hood body 1, air curtain assembly 11, range hood housing 12, oil fume duct 13, bellows 14, fan 15, exhaust pipe 16, baffle 17, oil cup 18, negative ion assembly 2, first negative ion emission head 21, second negative ion emission head 22, and fixing bracket 23.

[0033] The realization of the functions and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0034] The following diagrams illustrate various embodiments of the present invention. For clarity, many practical details will be included in the following description. However, it should be understood that these practical details are not intended to limit the present invention. In other words, in some embodiments of the present invention, these practical details are not essential. Furthermore, to simplify the drawings, some commonly used structures and components are depicted in simplified schematic form.

[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 various 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 invention, descriptions such as "first" and "second" are only used for descriptive purposes and do not specifically refer to the order or sequence, nor are they used to limit the present invention. 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 such feature. 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 invention.

[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 8 The utility model provides a range hood, comprising a range hood body 1 and a negative ion component 2.

[0039] The range hood body 1 comprises an air curtain assembly 11, a range hood housing 12, and an oil fume duct 13. The range hood housing 12 defines an air intake, which communicates with the oil fume duct 13. The air curtain assembly 11 is removably mounted on the range hood housing 12 and positioned above the intake. With the arrangement of the air curtain assembly 11, range hood housing 12, and oil fume duct 13, when the user uses the range hood, oil fume enters the oil fume duct 13 through the intake. Upon activation of the air curtain assembly 11, an air curtain is formed, preventing oil fume from escaping from the intake.

[0040] The negative ion assembly 2 includes a first negative ion emitter head 21 and a second negative ion emitter head 22. The mounting end of the first negative ion emitter head 21 is detachably mounted on the air curtain assembly 11, and the free end of the first negative ion emitter head 21 is located on a side close to the air inlet. The mounting end of the second negative ion emitter head 22 is detachably mounted within the range hood housing 12, and the free end of the second negative ion emitter head 22 is located within the oil fume passage 13. Through the configuration of the negative ion assembly 2, after the negative ion assembly 2 is started, the first negative ion emitter head 21 emits negative ions to adsorb the oil fume at the air inlet, and the negative ions emitted by the second negative ion emitter head 22 adsorb and inhibit bacteria from the oil fume in the oil fume passage 13, thereby reducing the accumulation of oil fume in the oil fume passage 13 and thereby reducing the adhesion of oil fume to the surface of the oil fume passage 13. In this embodiment, when the negative ion component 2 stops, the duty cycle of the air curtain fan 15 is 50ms, and when the negative ion component 2 starts, the duty cycle of the air curtain fan 15 is 125ms; thereby, the air curtain fan 15 blows out the negative ions at the maximum wind speed.

[0041] During the installation process of the present invention, the first negative ion emitter 21 is installed on the air curtain assembly 11, and the second negative ion emitter 22 is installed in the oil fume duct 13 in the range hood housing 12; when the range hood is in use, the oil fume is sucked into the air intake port, the air curtain assembly 11 and the negative ion assembly 2 are started, and the air curtain assembly 11 forms an air curtain after being started to prevent the oil fume at the air intake port from escaping, and the air curtain fan 15 blows out the negative ions to prevent the negative ions from being adsorbed on the air curtain fan 15; at the same time, the first negative ion emitter 21 emits negative ions to adsorb pollutants such as PM2.5 in the oil fume at the air intake port; at the same time, the negative ions emitted by the second negative ion emitter 22 adsorb the oil fume in the oil fume duct 13, and inhibit the pollutants in the oil fume located in the oil fume duct 13, thereby reducing the appearance of oil fume odor in the kitchen.

[0042] Based on the above examples, please refer to Figures 1 to 7The first negative ion emitter 21 and the second negative ion emitter 22 of the present invention are both bundled with carbon filaments. The negative ion assembly 2 also includes a plurality of fixing brackets 23. The mounting end of each first negative ion emitter 21 is mounted on the air curtain assembly 11 through each fixing bracket 23, and the mounting end of each second negative ion emitter 22 is mounted in the range hood housing 12 through each fixing bracket 23. The first negative ion emitter 21 and the second negative ion emitter 22 are both bundled with carbon filaments. When the range hood is in use, the bundled carbon filaments are used as the first negative ion emitter 21 to emit negative ions, thereby enhancing the adsorption of pollutants such as PM2.5 in the oil smoke at the air intake port. At the same time, the carbon filaments are bundled in the oil smoke passage 13 to emit negative ions, which can also enhance the antibacterial effect of the oil smoke passage 13. The first negative ion emitter 21 and the second negative ion emitter 22 are respectively fixed by fixing brackets 23 to prevent the first negative ion emitter 21 and the second negative ion emitter 22 from loosening during operation.

[0043] Based on the above examples, please refer to Figures 1 to 7 In the present invention, the free end of the first negative ion emitter 21 is perpendicular to or faces the flow direction of the airflow at the air inlet, and the free end of the second negative ion emitter 22 is perpendicular to or faces the flow direction of the airflow in the oil fume passage 13. By aligning the free end of the first negative ion emitter 21 with or faces the flow direction of the airflow at the air inlet, and aligning the free end of the second negative ion emitter 22 with or faces the flow direction of the airflow at the air inlet, the first negative ion emitter 21 and the second negative ion emitter 22 can better contact the oil fume, thereby allowing the oil fume to come into contact with more negative ions.

[0044] Based on the above examples, please refer to Figure 1 and Figure 3 The present invention includes multiple first negative ion emitting heads 21, and the mounting ends of each of the multiple first negative ion emitting heads 21 can be detachably mounted in the air duct of the air curtain assembly 11. In this embodiment, two first negative ion emitting heads 21 are provided, and the mounting ends of the two first negative ion emitting heads 21 are detachably mounted at the left and right ends of the air duct of the air curtain assembly 11 by screws. When a user uses the range hood, negative ions are emitted by the two first negative ion emitting heads 21, thereby absorbing the oil smoke on both sides of the air curtain assembly 11 and preventing smoke from escaping.

[0045] Based on the above examples, please refer to Figure 1 and Figure 2 The range hood body 1 of the present invention further includes a bellows 14 , a fan 15 , a smoke exhaust pipe 16 , a baffle 17 and an oil cup 18 .

[0046] The bellows 14 is detachably mounted on the top of the range hood housing 12, and the fan 15 is detachably mounted within the bellows 14. When the fan 15 is in the off state, the second negative ion emitter 22 is in the operating state. In this embodiment, the bellows 14 is detachably mounted on the top of the range hood housing 12 by screws, and the fan 15 is detachably mounted within the bellows 14 by screws. When the user uses the range hood, after the fan 15 is started, the outwardly discharged wind generated by the fan 15 creates a negative pressure at the air intake port, thereby facilitating the entry of oil smoke into the air intake port. At the same time, when the fan 15 is turned off, the negative ions emitted by the second negative ion emitter 22 inhibit the oil smoke in the oil smoke passage 13, thereby reducing the growth of bacteria in the oil smoke passage 13.

[0047] The exhaust pipe 16 is detachably mounted on the top of the bellows 14. Two baffles 17 are provided, one on the left and one on the right side of the range hood housing 12. The oil cup 18 is detachably mounted on the bottom of the range hood housing 12. Specifically, the exhaust pipe 16 is detachably mounted on the top of the bellows 14 by means of a snap-fit ​​connection, and the oil cup 18 is detachably mounted on the bottom of the range hood housing 12 by means of a snap-fit ​​connection. The oil cup 18 collects oil dripping from the range hood. When the user uses the range hood, oil smoke in the oil smoke passage 13 enters the exhaust pipe 16, which then exhausts the oil smoke in the kitchen to the outside. At the same time, the two baffles 17 block the oil smoke on the left and right sides of the range hood housing 12, preventing the oil smoke from escaping from the left or right side of the range hood housing 12.

[0048] Based on the above examples, please refer to Figure 1 、 Figure 4 、 Figure 5 and Figure 6 The utility model is provided with a plurality of second negative ion emitter heads 22, and the free ends of the plurality of second negative ion emitter heads 22 are all located in the oil fume passage 13, and the second negative ion emitter head 22 is detachably mounted at at least one position of the exhaust port of the bellows 14, the fan 15, and the exhaust pipe 16. In the present embodiment, three second negative ion emitter heads 22 are provided, and the free ends of the three second negative ion emitter heads 22 are all located in the oil fume passage 13. Specifically, the second negative ion emitter heads 22 are detachably mounted at the exhaust port of the bellows 14, the fan 15, and the exhaust pipe 16 by means of screw fixation. When the user uses the range hood, the oil fume entering the exhaust port of the bellows 14, the fan 15, and the exhaust pipe 16 is antibacterial, thereby reducing the growth of bacteria in the exhaust port of the bellows 14, the fan 15, and the exhaust pipe 16.

[0049] Based on the above examples, please refer to Figure 8The present invention further includes a negative ion circuit, which is electrically connected to the negative ion generator of the negative ion assembly 2, and the first negative ion emission head 21 and the second negative ion emission head 22 are electrically connected to the negative ion circuit respectively. By setting the negative ion circuit, after the negative ion generator CN12 is started, the first negative ion emission head 21 and the second negative ion emission head 22 are respectively emitted negative ions through the negative ion circuit.

[0050] Based on the above examples, please refer to Figure 8 The negative ion circuit of the present invention includes a filter circuit and a transient suppression diode (TVS1). The voltage output of the filter circuit is electrically connected to the voltage input of the transient suppression diode, which is in turn electrically connected to the voltage input of the negative ion generator of the negative ion component 2. In this embodiment, the filter circuit is an LC filter circuit. The LC filter circuit, composed of inductor L, capacitor C1, and capacitor C2, reduces the high-frequency ripple generated by the negative ion component 2 from affecting the front-end circuit when the negative ion component 2 is activated. At the same time, to protect the downstream circuit from the surge pulse impact of the 3KV negative voltage generated by the negative ions, a transient suppression diode (TVS1) is added to the voltage input. When its two poles are subjected to a reverse transient high-energy impact, it can convert the high impedance between the two poles into a low impedance at a speed of 10 to the negative 12th power of seconds, absorbing surge power of up to several kilowatts and clamping the voltage between the two poles to a predetermined value, effectively protecting the downstream circuit from interference and damage.

[0051] Based on the above examples, please refer to Figure 8 The negative ion circuit of the present utility model also includes a switching circuit and a comparison circuit.

[0052] The voltage input end of the switching circuit is electrically connected to the voltage output end of the negative ion generator of the negative ion component 2 , and the voltage output end of the switching circuit is electrically connected to the voltage input end of the comparison circuit.

[0053] The first negative ion emitting head 21 and the second negative ion emitting head 22 are both electrically connected to the output end of the comparison circuit.

[0054] Specifically, since the negative ion component 2 cannot be started for a long time, a switching circuit needs to be added to control the negative ion component 2, wherein the switching circuit includes R1, R2, Q1, and C5. By turning on the transistor Q1, both the first negative ion emission head 21 and the second negative ion emission head 22 emit negative ions.

[0055] When negative ion component 2 is activated, it generates a negative ion charge exceeding 3kV. Some negative ions will be attracted to the range hood surface, causing a shock sensation when cleaning the negative ion output area with your hands. An electric shock protection circuit has been added to the circuit to prevent human contact by immediately cutting off the 12V output. The comparator circuit includes U5, R4, R5, and R7. Resistors R4 and R5 form a reference voltage, which determines whether the voltage across the sampling resistor is greater than the reference voltage. When the voltage across the sampling resistor is greater than or equal to the reference voltage, the output is high. When the voltage across the sampling resistor is less than the reference voltage, the output is low.

[0056] In this embodiment, the signal output terminal of U5 is connected in parallel with C10 to suppress signal ripple, and R10 is connected in series with the control pin of transistor Q2. The Q2 control pin is connected to ground with a pull-down resistor R11 in parallel. When U5 outputs a high level, Q2 conducts and is grounded, pulling the signal at the Q3 control pin low. Q3 is cut off and disconnected, and the 12V input stops supplying power to the negative ions. When U5 outputs a low level, Q2 is not conducting, and the VGS voltage at the Q3 control pin remains high, allowing the 12V input to supply power to the negative ions. This provides electric shock protection. When an electric shock occurs, the operating current of the negative ion component 2 suddenly increases, immediately cutting off the input of the negative ion 12V power supply. When the negative ion component resumes normal operating current, the 12V power supply input to the negative ion component is restored.

[0057] Based on the above examples, please refer to Figure 8 The negative ion circuit of the present invention further includes a power supply anti-reverse connection circuit, and the first negative ion emission head 21 and the second negative ion emission head 22 are both electrically connected to the power supply anti-reverse connection circuit.

[0058] Specifically, to prevent the 12V power supply input from being connected in reverse, potentially damaging the negative ion component 2, a reverse power protection circuit has been added. This circuit includes Q3, R13, C11, and D1. When the 12V power supply is connected correctly, Q3 is a P-MOS transistor, and resistor R13 is connected in parallel with Q3's G and S terminals. When the power is turned on, Q3 receives the VGS turn-on voltage, causing it to saturate and conduct. The negative ion component 2 has a 12V input. C11, connected in parallel with Q3's G and S terminals, provides a slow start-up. When the negative ion component is turned on, a large inrush current is generated, causing electromagnetic interference and impacting the negative ions. Therefore, a "slow" power-up is required to control the input current's rising slope and amplitude. D1 is a voltage regulator diode, connected in parallel with C11 and R13, to prevent excessive 12V voltage from breaking down Q3. When the 12V voltage is reversed, resistor R13 cannot make the G pole of Q3 generate the VGS conduction voltage, and Q3 cannot be turned on, so it plays the role of power-on reverse connection protection.

[0059] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and description of the present invention.

Claims

1. A range hood, characterized in that: include: A range hood body (1), the range hood body (1) comprising an air curtain assembly (11), a range hood housing (12) and an oil fume passage (13), the range hood housing (12) being provided with an air suction port, the air suction port being in communication with the oil fume passage (13), the air curtain assembly (11) being detachably mounted on the range hood housing (12) and being located on top of the air suction port; A negative ion component (2) is provided, wherein the negative ion component (2) comprises a first negative ion emitting head (21) and a second negative ion emitting head (22), wherein the mounting end of the first negative ion emitting head (21) is detachably mounted on the air curtain component (11), the free end of the first negative ion emitting head (21) is located on a side close to the air inlet, the mounting end of the second negative ion emitting head (22) is detachably mounted in the range hood housing (12), and the free end of the second negative ion emitting head (22) is located in the oil fume passage (13).

2. The range hood according to claim 1, characterized in that: The first negative ion emitting head (21) and the second negative ion emitting head (22) are both bundled with carbon filaments. The negative ion assembly (2) further comprises a plurality of fixing brackets (23). The mounting end of each of the first negative ion emitting heads (21) is mounted on the air curtain assembly (11) via each of the fixing brackets (23), and the mounting end of each of the second negative ion emitting heads (22) is mounted in the range hood housing (12) via each of the fixing brackets (23).

3. The range hood according to claim 1, characterized in that: The free end of the first negative ion emission head (21) is perpendicular to or faces the flow direction of the airflow at the air inlet, and the free end of the second negative ion emission head (22) is perpendicular to or faces the flow direction of the airflow in the oil fume channel (13).

4. The range hood according to claim 1, characterized in that: A plurality of the first negative ion emission heads (21) are provided, and the mounting ends of the plurality of the first negative ion emission heads (21) can be detachably mounted in the air duct of the air curtain assembly (11).

5. The range hood according to claim 1, characterized in that: The smoke exhaust fan body (1) further includes a bellows (14), a fan (15), a smoke exhaust pipe (16), a baffle (17) and an oil cup (18); The wind box (14) is detachably mounted on the top of the smoke exhaust fan housing (12), and the fan (15) is detachably mounted in the wind box (14). When the fan (15) is in a closed state, the second negative ion emission head (22) is in an operating state. The smoke exhaust pipe (16) is detachably mounted on the top of the wind box (14); two baffles (17) are provided, and the two baffles (17) are respectively mounted on the left and right sides of the range hood housing (12); and the oil cup (18) is detachably mounted on the bottom of the range hood housing (12).

6. The range hood according to claim 5, characterized in that: A plurality of the second negative ion emission heads (22) are provided, and the free ends of the plurality of the second negative ion emission heads (22) are all located in the oil fume channel (13), and the second negative ion emission head (22) is detachably mounted at at least one position of the bellows (14), the exhaust port of the fan (15), and the exhaust pipe (16).

7. The range hood according to any one of claims 1 to 6, characterized in that: It also includes a negative ion circuit, which is electrically connected to the negative ion generator of the negative ion component (2), and the first negative ion emission head (21) and the second negative ion emission head (22) are electrically connected to the negative ion circuit respectively.

8. The range hood according to claim 7, characterized in that: The negative ion circuit comprises a filter circuit and a transient suppression diode, wherein the voltage output end of the filter circuit is electrically connected to the voltage input end of the transient suppression diode, and the voltage output end of the transient suppression diode is electrically connected to the voltage input end of the negative ion generator of the negative ion component (2).

9. The range hood according to claim 7, characterized in that: The negative ion circuit also includes a switch circuit and a comparison circuit; The voltage input end of the switch circuit is electrically connected to the voltage output end of the negative ion generator of the negative ion component (2), and the voltage output end of the switch circuit is electrically connected to the voltage input end of the comparison circuit; The first negative ion emission head (21) and the second negative ion emission head (22) are both electrically connected to the output end of the comparison circuit.

10. The range hood according to claim 7, characterized in that: The negative ion circuit further comprises a power supply anti-reverse connection circuit, and the first negative ion emission head (21) and the second negative ion emission head (22) are both electrically connected to the power supply anti-reverse connection circuit.

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