Range hood

Abstract

An oil filtering assembly is installed in a water tank, so that when a water pump sucks cleaning liquid in the water tank, oil in liquid flowing to the water inlet end of the water pump can be filtered by the oil filtering assembly, and oil stains in the water tank are prevented from being sprayed back to a mesh plate after being sucked by the water pump. Therefore, the oil stain is prevented from influencing the formation of a foam layer on the mesh plate, the adsorption effect of the foam layer on oil is improved, and the filtering effect of the range hood on the oil in oil smoke is improved. In addition, oil contamination is prevented or reduced from being sucked by the water pump, the oil contamination can be prevented from adhering and accumulating in the water pump and the spray pipe to block the water pump and the spray pipe, and therefore the continuous working effect of the water pump and the spray pipe can be guaranteed.

Description

Technical Field

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

[0002] In the prior art, the first step in treating oil fumes in range hoods is to form a foam layer on a mesh plate to absorb the oil in the fumes. A water tank is located below the mesh plate to allow the oil-absorbed foam to flow back into the tank. Cleaning liquid mixed with a foaming agent in the tank is then pumped through a water pump and nozzle and sprayed onto the surface of the mesh plate to form a new foam layer. However, the water pump tends to suck up the cleaning liquid from the tank along with the oil, causing it to be sprayed onto the mesh plate, affecting the formation of the foam layer and resulting in poor oil fume absorption. Utility Model Content

[0003] The main purpose of the utility model is to provide a range hood, aiming to solve the technical problem of how to improve the adsorption effect of oil in the smoke.

[0004] To achieve the above-mentioned purpose, the range hood proposed by the present invention comprises:

[0005] A housing, the housing being provided with a water tank, an oil fume treatment channel, and a smoke inlet, the oil fume treatment channel being located above the water tank, a smoke passage area being formed between the water tank and the oil fume treatment channel, the oil fume treatment channel being in communication with the smoke inlet through the smoke passage area; the water tank being used to hold a cleaning liquid mixed with a foaming agent;

[0006] A mesh plate, the mesh plate being installed at the inlet end of the oil fume treatment channel, the mesh plate being provided with a plurality of flow holes;

[0007] a first water pump, the first water pump being installed in the housing, and a water inlet end of the first water pump being communicated with the bottom of the water tank;

[0008] a spray pipe, one end of which is connected to the water outlet of the first water pump and the other end of which is located above the mesh plate to spray cleaning liquid onto the mesh plate;

[0009] An oil filter assembly is installed in the water tank, the side of the oil filter assembly close to the water inlet end of the first water pump is the rear filter side, and the side away from the water inlet end of the first water pump is the front filter side. The oil filter assembly is used to filter the oil in the liquid flowing from the front filter side to the rear filter side.

[0010] Optionally, the oil filter assembly includes an oil separator, which separates the water tank into at least two tank bodies, and forms a flow gap between the bottom side of the oil separator and the bottom of the water tank, and the flow gap connects two adjacent tank bodies. The top side of the oil separator protrudes from the highest liquid level of the water tank to intercept the oil floating on the liquid surface of the water tank; the water inlet end of the first water pump is connected to one of the tank bodies.

[0011] Optionally, the number of the oil separators is at least two, and at least two oil separators are spaced apart along the length direction of the water tank.

[0012] Optionally, the distance between two adjacent oil separators is set to 50 mm to 150 mm.

[0013] Optionally, the height of the flow gap is set to 20 mm to 40 mm.

[0014] Optionally, the length of the water tank is greater than the length of the mesh plate, at least two of the oil separators include a first oil separator, the water inlet end of the first water pump is located on the rear filter side of the first oil separator, and the projection of the mesh plate on the bottom of the water tank is located on the front filter side of the first oil separator.

[0015] Optionally, the range hood further includes a water supply pipe, the water outlet end of the water supply pipe is connected to the water tank to replenish water into the water tank; an overflow port is provided in the water tank, and the overflow port is higher than the bottom of the water tank and lower than the top side of the grease separator.

[0016] Optionally, the overflow port is located on the front filter side of the oil filter assembly.

[0017] Optionally, the range hood further includes a controller, a water supply valve and a water level sensor, wherein the water supply valve is installed on the water supply pipeline to control the on-off of the water supply pipeline; the water level sensor is installed on the casing to detect the water level in the water tank; the water supply valve and the water level sensor are both electrically connected to the controller, and the controller is used to control the water supply valve to open the water supply pipeline when the water level in the water tank is lower than the overflow port.

[0018] Optionally, the range hood further includes a detergent adding device installed in the casing, the detergent adding device including a liquid storage container and a second water pump, the liquid storage container is used to store detergent mixed with a foaming agent, the water inlet end of the second water pump is connected to the liquid storage container, and the water outlet end is connected to the water sink.

[0019] In the technical solution of the range hood of this utility model, an oil filter assembly is installed in the water tank. When the water pump draws cleaning liquid from the water tank, the oil in the liquid flowing to the water inlet of the water pump can be filtered by the oil filter assembly. This prevents or reduces the oil in the water tank from being sucked by the water pump and sprayed back into the mesh plate. This prevents the oil from affecting the formation of the foam layer on the mesh plate, thereby enhancing the foam layer's adsorption of oil, thereby improving the range hood's ability to filter oil from oil smoke. In addition, preventing or reducing oil from being drawn into the water pump can also prevent oil from adhering to and accumulating inside the water pump and nozzle, which could cause blockage of the water pump and nozzle, thereby ensuring the continued operation of the water pump and nozzle. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0021] Figure 1 This is a structural diagram of an embodiment of the range hood of the present utility model;

[0022] Figure 2 This is a structural cross-sectional view of an embodiment of the range hood of the present utility model;

[0023] Figure 3 This is a cross-sectional schematic diagram of an embodiment of the range hood of the present utility model;

[0024] Figure 4 This is a schematic diagram of the local structure of the range hood of the present invention.

[0025] Description of Figure Numbers:

[0026] Label name Label name Label name 10 chassis 11 sink 12 Oil fume treatment channel 13 Smoke inlet 14 Smoke-passing area 20 Mesh plate 30 First water pump 40 nozzle 50 Oil filter assembly 51 Grease separator 111 Overflow 52 First oil separator 53 Filter front side 54 Post-filter side

[0027] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications 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 indications will also change accordingly.

[0030] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the meaning of "and / or" appearing throughout the text is to include three parallel solutions. Taking "A and / or B as an example", it includes solution A, or solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually 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.

[0031] In the prior art, the first step in treating oil fumes in range hoods is to form a foam layer on a mesh plate to absorb the oil in the fumes. A water tank is located below the mesh plate to allow the oil-absorbed foam to flow back into the tank. Cleaning liquid mixed with a foaming agent in the tank is then pumped through a water pump and nozzle and sprayed onto the surface of the mesh plate to form a new foam layer. However, the water pump tends to suck up the cleaning liquid from the tank along with the oil, causing it to be sprayed onto the mesh plate, affecting the formation of the foam layer and resulting in poor oil fume absorption.

[0032] The utility model provides a range hood, aiming to solve the technical problem of how to improve the adsorption effect of oil in the smoke.

[0033] In the embodiment of the present utility model, Figures 1 to 4As shown, the range hood comprises: a housing 10, the housing 10 is provided with a water tank 11, an oil fume treatment channel 12 and a smoke inlet 13, the oil fume treatment channel 12 is located above the water tank 11, a smoke passage area 14 is formed between the water tank 11 and the oil fume treatment channel 12, the oil fume treatment channel 12 is connected to the smoke inlet 13 through the smoke passage area 14; the water tank 11 is used to contain a cleaning liquid mixed with a foaming agent; a mesh plate 20, the mesh plate 20 is installed at the inlet end of the oil fume treatment channel 12, the mesh plate 20 is provided with a plurality of flow holes; a first water pump 30, the first water pump 30 is installed at the In the casing 10, the water inlet end of the first water pump 30 is connected to the bottom of the water tank 11; the nozzle 40, one end of the nozzle 40 is connected to the water outlet end of the first water pump 30, and the other end is located above the mesh plate 20 to spray cleaning liquid onto the mesh plate 20; the oil filter assembly 50, the oil filter assembly 50 is installed in the water tank 11, the side of the oil filter assembly 50 close to the water inlet end of the first water pump 30 is the rear filter side 54, and the side away from the water inlet end of the first water pump 30 is the front filter side 53, the oil filter assembly 50 is used to filter the oil in the liquid flowing from the front filter side 53 to the rear filter side 54.

[0034] In this embodiment, the housing 10 forms the overall appearance of the range hood. The specific shape of the housing 10 is not limited, as long as it is provided with a smoke inlet 13 and an oil fume treatment passage 12. The smoke inlet 13 can be located on the front side wall of the housing 10 or on the bottom wall of the housing 10. This is not limited here, as long as the upward-flowing oil fume can enter the oil fume treatment passage 12 from the smoke inlet 13. The range hood may also include a smoke exhaust fan, which is mounted in the oil fume treatment passage 12 to drive airflow from the smoke inlet 13 to the oil fume treatment passage 12, thereby driving oil fume near the smoke inlet 13 into the oil fume treatment passage 12. The smoke passage area 14 is located within the housing 10 downstream of the smoke inlet 13 in the airflow direction. After the oil fume enters the smoke inlet 13, it first flows through the smoke passage 14 and then flows upward into the oil fume treatment passage 12. When the oil smoke enters the oil smoke treatment channel 12, it first flows through the mesh plate 20. The mesh plate 20 has a plurality of flow holes distributed thereon. The oil smoke can pass through the mesh plate 20 through the flow holes and then continue to flow upward.

[0035] The first water pump 30 draws cleaning liquid from the water tank 11 and delivers it to the nozzle 40, which then sprays the cleaning liquid onto the upper surface of the mesh plate 20. Because the cleaning liquid contains a foaming agent, it forms a foam layer on the upper surface of the mesh plate 20. This causes cooking fumes to flow through the foam layer as they pass through the mesh plate 20. The foam absorbs the oil in the cooking fumes, filtering them out. The foam and oil combine to form oil liquid, which flows back into the water tank 11 through the flow holes. Because oil liquid has a lower density than water, it floats on the water surface, forming oil stains.

[0036] It should be noted that the combination of foam and oil flowing back into the water tank 11 will cause a decrease in the amount of foam on the mesh plate 20. Therefore, the first water pump 30 needs to continuously pump the liquid in the water tank 11 and spray it onto the mesh plate 20 through the nozzle 40 to continuously form a new layer of foam, thereby filtering the oil fume that continues to flow into the oil fume treatment channel 12. After the initially formed foam combines with the oil and flows back into the water tank 11, oil will float on the surface of the liquid in the water tank 11. Since the water inlet end of the first water pump 30 is close to the bottom of the water tank 11, it can preferentially pump clean cleaning liquid, ensuring that the cleaning liquid delivered to the nozzle 40 forms a new layer of foam after being sprayed onto the mesh plate 20.

[0037] The specific form of the oil filter assembly 50 is not limited, and it only needs to be able to intercept oil and dirt flowing toward the water inlet of the first water pump 30. Under the suction force of the water inlet of the first water pump 30, the liquid in the water tank 11 has a clear flow path. For example, if the water inlet of the first water pump 30 is close to the left wall of the water tank 11, the liquid in the water tank 11 will flow from right to left. At this time, the front filter side 53 of the oil filter assembly 50 is located to the right of the rear filter side 54 of the oil filter assembly 50, so that when the liquid in the water tank 11 flows, it can flow from the front filter side 53 of the oil filter assembly 50, through the oil filter assembly 50, then flow to the rear filter side 54, and finally flow to the water inlet of the first water pump 30. When liquid flows through the oil filter assembly 50, floating oil residue on the water surface is intercepted and filtered by the oil filter assembly 50, thereby reducing or preventing the oil residue from being drawn into the first water pump 30 along with the cleaning liquid. This ensures that the liquid delivered to the nozzle 40 by the first water pump 30 is primarily clean cleaning liquid, effectively forming a foam layer upon spraying onto the mesh plate 20. This prevents oil residue from interfering with the formation of the foam layer on the mesh plate 20, enhancing the foam layer's ability to absorb oil, and thus improving the range hood's ability to filter oil from oil fumes. Furthermore, preventing or reducing the amount of oil residue drawn into the water pump prevents oil residue from adhering to and accumulating within the water pump and nozzle 40, potentially blocking them and ensuring their continued operation.

[0038] In one embodiment, the oil filter assembly 50 may be a flow device having a liquid inlet on the front side 53 and a liquid outlet on the rear side 54. When the liquid in the water tank 11 flows through the oil filter assembly 50, it flows from the liquid inlet into the flow channel of the oil filter assembly 50 and then flows out from the liquid outlet. Oil is also intercepted and filtered within the oil filter assembly 50. Of course, the oil filter assembly 50 may also be an open structure without a flow channel.

[0039] Specifically, such as Figure 4As shown, the oil filter assembly 50 includes an oil separator 51, which separates the water tank 11 into at least two tank bodies. A flow gap is formed between the bottom side of the oil separator 51 and the bottom of the water tank 11. The flow gap connects the two adjacent tank bodies. The top side of the oil separator 51 protrudes from the highest liquid level of the water tank 11 to intercept the oil floating on the liquid surface of the water tank 11; the water inlet end of the first water pump 30 is connected to one of the tank bodies.

[0040] The front side of the oil separator 51 is connected to the front wall of the water tank 11, and the rear side of the oil separator 51 is connected to the rear wall of the water tank 11. Because the top side of the oil separator 51 is above the liquid level, the liquid in the water tank 11 can only pass through the flow gap below the oil separator 51 when flowing through the oil separator 51. Since oil floats on the liquid surface of the water tank 11, the oil is intercepted by the oil separator 51 and cannot pass through. Only when the liquid level in the water tank 11 drops to the flow gap can the oil pass through the flow gap. However, the liquid in the water tank 11 does not continuously decrease after being pumped by the first water pump 30. The oil flowing back into the water tank 11 from the mesh plate 20 creates a dynamic balance in the liquid volume in the water tank 11, thus ensuring that the liquid level in the water tank 11 is maintained above the flow gap. Therefore, the oil floating on the liquid surface is unable to flow through the flow gap to the water inlet of the first water pump 30, thus achieving long-term interception of the oil. By intercepting the oil dirt floating on the liquid surface of the water tank 11 by the oil separator 51, the form of the oil filter assembly 50 can be simplified, thereby simplifying the internal structure of the range hood and reducing the structural cost of the range hood.

[0041] The number of the oil separator 51 may be one, or two or more.

[0042] In practical applications, such as Figure 4 As shown, the number of the oil separators 51 is at least two, and at least two oil separators 51 are spaced apart along the length direction of the water tank 11. One oil separator 51 can separate the water tank 11 into two tank bodies, two oil separators 51 can separate the water tank 11 into three tank bodies, and so on, n oil separators 51 can separate the water tank 11 into n+1 tank bodies. The water inlet end of the first water pump 30 can be connected to any one of the tank bodies, so that when the liquid in the other n tank bodies flows to the water inlet end of the first water pump 30, it needs to pass through at least one oil separator 51 to intercept the oil floating on the liquid surface. Setting the number of oil separators 51 to two or more can reduce the burden of a single oil separator 51 on intercepting oil and improve the overall interception effect of the oil filter assembly 50 on oil.

[0043] For example, Figure 4As shown, the length of the water tank 11 is greater than the length of the mesh plate 20, at least two of the oil separators 51 include a first oil separator 5251, the water inlet end of the first water pump 30 is located at the rear filter side 54 of the first oil separator 5251, and the projection of the mesh plate 20 on the bottom of the water tank 11 is located at the front filter side 53 of the first oil separator 5251.

[0044] The water inlet end of the first water pump 30 and the projection of the mesh plate 20 on the bottom of the water tank 11 are respectively located on both sides of the first oil separator 5251. In this way, it can be ensured that the oil on the mesh plate 20 is always on the front filter side 53 of the first oil separator 5251 when it just flows back to the water tank 11. That is, after the oil on the mesh plate 20 flows back to the water tank 11, when it flows to the water inlet end of the first water pump 30, it needs to at least flow through the first oil separator 5251, so that the oil on the liquid surface will at least be intercepted by the first oil separator 5251 to ensure that the water inlet end of the first water pump 30 sucks clean cleaning liquid.

[0045] Specifically, the distance between two adjacent oil separators 51 is set to 50mm to 150mm, for example, it can be 50mm, 60mm, 70mm, 80mm, 90mm, 100mm, 110mm, 120mm, 130mm, 140mm or 150mm, etc. In this way, the distribution density of the oil separator 51 in the water tank 11 can be reasonably controlled, and the oil separator 51's ability to intercept oil pollution can be guaranteed.

[0046] In practical applications, the height of the flow gap is set to 20 mm to 40 mm, for example, it can be 20 mm, 25 mm, 30 mm, 35 mm or 40 mm, etc. In this way, the flow rate of the liquid flowing to the water inlet end of the first water pump 30 can be guaranteed, and the liquid level can be prevented from easily dropping to the flow gap.

[0047] For example, Figure 3 and Figure 4 As shown, the range hood also includes a water supply pipe, the water outlet end of the water supply pipe is connected to the water tank 11 to replenish water into the water tank 11; an overflow port 111 is provided in the water tank 11, and the overflow port 111 is higher than the bottom of the water tank 11 and lower than the top side of the oil separator 51.

[0048] The highest water level in the water tank 11 is the height of the overflow port 111. When the water level reaches the height of the overflow port 111, the liquid will begin to flow out of the overflow port 111, and the liquid on the liquid surface will first flow to the overflow port 111. Since oil and dirt float on the liquid surface, the oil and dirt floating on the liquid surface will be discharged from the overflow port 111 first, thereby achieving the drainage of oil and dirt in the water tank 11. The water supply pipe can replenish water into the water tank 11 to ensure that the liquid level in the water tank 11 is always maintained at the highest water level equal to the height of the overflow port 111. In this way, the oil on the mesh plate 20 will flow back into the water tank 11, causing the water level in the water tank 11 to be higher than the overflow port 111, so that the oil and dirt on the liquid surface can be discharged through the overflow port 111.

[0049] Specifically, such as Figure 4 As shown, the overflow port 111 is located on the front filter side 53 of the oil filter assembly 50. Clean cleaning liquid near the bottom of the water tank 11 can flow to the water inlet of the first water pump 30 through the flow gap. After the oil floating on the liquid surface is intercepted at the front filter side 53 of the oil filter assembly 50, it can first flow to the overflow port 111 when the water level in the water tank 11 is higher than the overflow port 111, and finally be discharged through the overflow port 111. In this way, the flow direction of the cleaning liquid to the water inlet of the first water pump 30 can be opposite to the flow direction of the oil to the overflow port 111, thereby reducing the clean cleaning liquid from flowing out of the overflow port 111 and reducing the oil to flow to the water inlet of the first water pump 30, thereby avoiding the waste of clean cleaning liquid and further reducing the oil suctioned by the first water pump 30.

[0050] In actual application, the range hood also includes a controller, a water supply valve and a water level sensor. The water supply valve is installed on the water supply pipeline to control the on-off of the water supply pipeline; the water level sensor is installed on the casing 10 to detect the water level in the water tank 11; the water supply valve and the water level sensor are both electrically connected to the controller, and the controller is used to control the water supply valve to open the water supply pipeline when the water level in the water tank 11 is lower than the overflow port 111.

[0051] The controller includes a main control board, which is provided with a comparison circuit, a trigger circuit and a water supply control circuit. The water supply pipeline can be connected to a water source (such as a faucet or a water tank), and the water supply valve is an electrically controlled valve, which is electrically connected to the water supply control circuit. The water level sensor is electrically connected to the comparison circuit. The comparison circuit is set with a preset water level, which is equal to the height of the overflow port 111. The water level sensor monitors the current water level in the water tank 11 in real time and transmits the signal of the current water level to the comparison circuit for comparison with the preset water level. When the current water level is lower than the overflow port 111 due to the suction of the first water pump 30, that is, lower than the preset water level, the comparison circuit triggers the trigger circuit, and the trigger circuit triggers the water supply control circuit, so that the water supply control circuit controls the water supply valve to conduct the water supply pipeline, thereby causing the water supply pipeline to replenish water into the water tank 11. When the water level in the water tank 11 is replenished to a preset level by the water supply pipeline, the water supply control circuit controls the water supply valve to cut off the water supply pipeline based on the same control logic, thereby stopping the water supply to the water tank 11. In this way, the water tank 11 can be automatically replenished with water, thereby automatically draining grease, thereby improving the convenience of using the range hood.

[0052] Exemplarily, the range hood further includes a detergent adding device installed within the housing 10. The detergent adding device includes a liquid storage container and a second water pump. The liquid storage container is used to store detergent mixed with a foaming agent. The water inlet of the second water pump is connected to the liquid storage container, and the water outlet of the second water pump is connected to the water tank 11. The detergent adding device is installed above the water tank 11. The detergent adding device can add detergent to the water tank 11 via the second water pump to effectively update the cleaning liquid in the water tank 11 and ensure that the cleaning liquid can effectively form a foam layer after being sprayed onto the mesh plate 20. The detergent adding device can add water after each water replenishment of the water supply pipeline or after each water replenishment of the water tank 11. There is no limitation here.

[0053] The above description is merely an optional embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by utilizing the contents of the present invention specification and drawings under the inventive concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A range hood, characterized in that: include: A housing, the housing being provided with a water tank, an oil fume treatment channel, and a smoke inlet, the oil fume treatment channel being located above the water tank, a smoke passage area being formed between the water tank and the oil fume treatment channel, the oil fume treatment channel being in communication with the smoke inlet through the smoke passage area; the water tank being used to hold a cleaning liquid mixed with a foaming agent; A mesh plate, the mesh plate being installed at the inlet end of the oil fume treatment channel, the mesh plate being provided with a plurality of flow holes; a first water pump, the first water pump being installed in the housing, and a water inlet end of the first water pump being communicated with the bottom of the water tank; a spray pipe, one end of which is connected to the water outlet of the first water pump and the other end of which is located above the mesh plate to spray cleaning liquid onto the mesh plate; An oil filter assembly is installed in the water tank, the side of the oil filter assembly close to the water inlet end of the first water pump is the rear filter side, and the side away from the water inlet end of the first water pump is the front filter side. The oil filter assembly is used to filter the oil in the liquid flowing from the front filter side to the rear filter side.

2. The range hood according to claim 1, wherein: The oil filter assembly includes an oil separator, which separates the water tank into at least two tank bodies. A flow gap is formed between the bottom side of the oil separator and the bottom of the water tank. The flow gap connects two adjacent tank bodies. The top side of the oil separator protrudes above the highest liquid level of the water tank to intercept the oil floating on the liquid surface of the water tank. The water inlet end of the first water pump is connected to one of the tank bodies.

3. The range hood according to claim 2, wherein: The number of the oil separators is at least two, and the at least two oil separators are spaced apart along the length direction of the water tank.

4. The range hood according to claim 3, wherein: The distance between two adjacent oil separators is set to 50mm to 150mm.

5. The range hood according to claim 2, wherein: The height of the overflow gap is set to 20 mm to 40 mm.

6. The range hood according to claim 3, wherein: The length of the water tank is greater than the length of the mesh plate, and at least two of the oil separators include a first oil separator. The water inlet end of the first water pump is located on the rear filter side of the first oil separator, and the projection of the mesh plate on the bottom of the water tank is located on the front filter side of the first oil separator.

7. The range hood according to claim 2, wherein: The range hood also includes a water supply pipe, the water outlet of which is connected to the water tank to replenish water into the water tank; an overflow port is provided in the water tank, and the overflow port is higher than the bottom of the water tank and lower than the top side of the grease separator.

8. The range hood according to claim 7, wherein: The overflow port is located on the front filter side of the oil filter assembly.

9. The range hood according to claim 7, wherein: The range hood also includes a controller, a water supply valve and a water level sensor. The water supply valve is installed on the water supply pipeline to control the on-off of the water supply pipeline; the water level sensor is installed on the casing to detect the water level in the water tank; the water supply valve and the water level sensor are both electrically connected to the controller, and the controller is used to control the water supply valve to conduct the water supply pipeline when the water level in the water tank is lower than the overflow port.

10. The range hood according to any one of claims 1 to 9, characterized in that: The range hood also includes a detergent adding device installed in the casing, and the detergent adding device includes a liquid storage container and a second water pump. The liquid storage container is used to store detergent mixed with a foaming agent. The water inlet end of the second water pump is connected to the liquid storage container, and the water outlet end is connected to the water tank.

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