Washing type smoke hood

Abstract

The invention discloses a water washing type smoke hood which comprises an oil smoke extraction frame used for installing a filter screen. The water spraying system is used for spraying water; the water tank is used for bearing water sprayed by the water spraying system; the water baffle is mounted on the outer side of the oil fume extraction frame, and a flushing channel is reserved between the water baffle and the oil fume extraction frame; the water baffle extends into the water tank, a first smoke inlet channel is reserved between the water baffle and the water tank, the first smoke inlet channel is communicated with the flushing channel, and the water baffle can guide water sprayed by the water spraying system to flow to the water tank; the water spraying system can spray water to the flushing channel. Therefore, the water spraying system sprays water to the water flushing channel, so that the temperature of the water baffle is low, and oil smoke enters the first smoke inlet channel, is quickly deposited on the water baffle and flows into the water tank along the water baffle; and water in the water tank forms a water curtain under the action of negative pressure to dissolve the oil fume. The oil smoke in the process cannot cause blockage of a water spraying system and a pipeline, and meanwhile, the temperature of the oil smoke is reduced, so that the risk of a fire in a subsequent pipeline is effectively avoided.

Description

Technical Field

[0001] This application relates to the field of kitchen fume treatment equipment technology, and in particular to a water-washable fume hood. Background Technology

[0002] In the existing field of household and commercial kitchen fume treatment technology, the range hood, as a core device, primarily functions to capture and expel cooking fumes during cooking to ensure indoor air quality and user health. Currently, the nozzles of the water spray system in water-washable range hoods come into direct contact with the fumes. Over time, oil droplets gradually accumulate at the nozzles, leading to clogging. Furthermore, the gentle water flow of traditional water-washable range hoods makes it difficult to thoroughly remove grease from the fumes, resulting in a large accumulation of grease in the hood ducts and even blockages. Summary of the Invention

[0003] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes a water-washable fume hood that can prevent the water spray system from being blocked by oil droplets and has a better effect on removing oil fumes.

[0004] According to an embodiment of this application, a water-washable fume hood includes a fume extraction frame for mounting a filter screen; a water spray system for spraying water; a water tank for holding the water sprayed by the water spray system; and a baffle plate installed on the outside of the fume extraction frame with a gap between it and the frame, forming a flushing channel. One end of the baffle plate extends into the water tank, and a gap between the baffle plate and the tank forms a first smoke inlet channel, which connects to the flushing channel. The baffle plate guides the water sprayed by the water spray system to the water tank. The water spray system sprays water into the flushing channel.

[0005] According to an embodiment of this application, the range hood frame includes a first frame and a second frame connected to the first frame. The first frame has the same structural dimensions as the second frame, and the first frame and the second frame are symmetrically distributed about the connection point between the first frame and the second frame, which extends into the water tank.

[0006] According to an embodiment of this application, a gap is left between the first frame and the second frame, and the gap forms a second smoke inlet channel, which is connected to a flushing channel through a filter screen.

[0007] According to an embodiment of this application, a water-washable fume hood includes an inner side plate, which is fixedly connected to the side of the fume extraction frame and the side of the water baffle. The inner side plate, the water baffle, and the fume extraction frame together form a flushing channel, and the inner side plate and the fume extraction frame together form a second smoke inlet channel.

[0008] According to an embodiment of this application, the water-washable fume hood includes a front panel, a back panel, and outer panels. The outer panels are all located outside the inner panel. The front panel is connected to the outer panels, and the back panel is connected to the outer panels. The outer panels and the front panel form a third smoke inlet channel, and the outer panels and the back panel form a fourth smoke inlet channel. The fumes can enter the first smoke inlet channel through the third smoke inlet channel and / or the fourth smoke inlet channel.

[0009] According to an embodiment of this application, the outer side plate is provided with a guide groove on the inner side, one end of which extends into the water tank. The guide groove can receive the oil droplets deposited on the outer side plate and guide the oil droplets into the water tank.

[0010] According to an embodiment of this application, the water spraying system includes a water supply pipe and a plurality of nozzles. The water supply pipe is capable of supplying water to the nozzles, and the plurality of nozzles are located in a first direction of the water spraying channel, with the nozzles spaced apart.

[0011] According to an embodiment of this application, the water spraying system includes a washing tank connected to a water supply pipe. The washing tank contains washing liquid, which can flow through the water supply pipe to a nozzle and be sprayed into the flushing channel through the nozzle.

[0012] According to an embodiment of this application, a water-washable fume hood includes a fan installed in a first direction on the fume extraction frame. The fan is capable of drawing gas from the fume extraction frame to create a negative pressure at the fume extraction frame.

[0013] According to an embodiment of this application, the water tank includes a drain pipe for draining water from the water tank.

[0014] The water-washable fume hood according to the embodiments of this application has at least the following beneficial effects: a baffle plate is installed on the outside of the fume extraction frame and extends into the water tank, forming a first smoke inlet channel between the baffle plate and the water tank, and a flushing channel between the baffle plate and the fume extraction frame. Thus, after entering the fume hood, the fumes need to flow sequentially through the first smoke inlet channel and the flushing channel to the filter screen. During this process, on the one hand, the water spray system sprays water into the flushing channel, and the side of the baffle plate near the flushing channel contacts the water and cools down, resulting in a lower temperature for the baffle plate. When the fumes enter the first smoke inlet channel, the high-temperature fumes touch the low-temperature baffle plate, and some of the fumes quickly deposit on the baffle plate and eventually flow slowly along the baffle plate into the water tank. On the other hand, the water in the water tank forms a vortex-like water curtain under the negative pressure of the fume hood, and some of the fumes entering the flushing channel dissolve into the water curtain. Thus, only a small portion of the fumes remains after being filtered by the filter screen. The oil fume content after this process is extremely low, which will not cause blockage of the water spray system and pipes. At the same time, the temperature of the oil fume also drops significantly, effectively avoiding the risk of fire in the pipes later.

[0015] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0016] The present application will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 This is a schematic diagram of the overall structure of a water-washable fume hood according to one embodiment of this application; Figure 2 for Figure 1 A schematic diagram of an explosion involving a water-washable fume hood; Figure 3 for Figure 1 A top view of a water-washable fume hood; Figure 4 for Figure 3 A cross-sectional view of the AA section line of a water-washable fume hood; Figure 5 This is a schematic diagram of the outer side panel of a water-washable fume hood.

[0017] Figure label: 100. Fume extraction frame; 110. Filter screen; 120. First frame; 130. Second frame; 200. Water spray system; 210. Water supply pipe; 220. Nozzle; 230. Washing tank; 300. Water tank; 310. Drain pipe; 400. Water baffle; 510. Flushing channel; 520. First smoke inlet channel; 530. Second smoke inlet channel; 540. Third smoke inlet channel; 550. Fourth smoke inlet channel; 610. Inner side panel; 620. Front panel; 630. Back panel; 640. Outer side panel; 650. Top panel; 651. Ventilation opening; 700. Lamp cover assembly. Detailed Implementation

[0018] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0019] In the description of this application, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0020] In the description of this application, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0021] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.

[0022] In the description of this application, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0023] In the existing field of household and commercial kitchen fume treatment technology, the fume hood, as the core equipment of the fume control system, primarily functions to capture and expel cooking fumes in a timely manner during cooking to ensure indoor air quality and the health of users. With the rapid development of the catering industry and the increasing demands of residents for a better kitchen environment, the technical performance and reliability of fume purification equipment are receiving growing attention.

[0024] Currently, water-washable fume hoods, which are commonly found on the market, have been used to some extent in small and medium-sized catering establishments and some family kitchens due to their relatively simple structure and certain ability to cool down and initially purify oil fumes.

[0025] However, traditional water-washable fume hoods have revealed numerous technical defects in actual operation, severely hindering their promotion and application. Firstly, existing water-washable fume hoods typically employ an open or semi-open design for their spray systems, with the nozzles directly exposed to the oil fume airflow channel. This makes it extremely easy for grease particles from the oil fume to adhere to the nozzle surface. Over long-term use, these oil droplets gradually accumulate and condense at the nozzle opening, eventually causing nozzle blockage, significantly reducing spray efficiency, and even completely losing the ability to cover the water curtain, resulting in a substantial decrease in oil fume capture efficiency.

[0026] More seriously, the water flow generated by traditional water-washing fume hoods is mostly laminar or weakly turbulent, with low flow velocity and insufficient kinetic energy. This makes it difficult to effectively impact and trap the tiny oil droplets and particles in the fumes. A large amount of unremoved grease enters the exhaust duct with the airflow and gradually condenses and deposits on the inner wall of the duct, forming a stubborn layer of grease. Over time, this grease thickens, significantly increasing system resistance, reducing exhaust efficiency, and potentially causing safety hazards such as fires.

[0027] To address the aforementioned issues, this application proposes a water-washable fume hood that can prevent the water spray system from being clogged by oil droplets and has a better effect on removing oil fumes.

[0028] The following is for reference. Figures 1 to 5 Describes a washable fume hood according to an embodiment of this application.

[0029] It is worth noting that, please refer to Figure 1 and Figure 2 In the spatial rectangular coordinate system shown in the figure, the X-axis of the coordinate system points to the right of the washable smoke hood, the Y-axis points to the rear of the washable smoke hood, and the Z-axis points to the first direction, that is, the top of the washable smoke hood. The positional relationship of the components in the following embodiments is based on the direction pointed to by this spatial rectangular coordinate system.

[0030] One embodiment of this application discloses a washable fume hood; please refer to... Figure 2 and Figure 4 The water-washable fume hood includes a fume extraction frame 100, a water spray system 200, a water tank 300, and a baffle plate 400. The fume extraction frame 100 is used to install a filter screen 110; the water spray system 200 is used to spray water; the water tank 300 is used to hold the water sprayed by the water spray system 200; the baffle plate 400 is installed on the outside of the fume extraction frame 100 with a gap between it and the frame 100, forming a flushing channel 510; one end of the baffle plate 400 extends into the water tank 300, and the gap between the baffle plate 400 and the tank 300 forms a first smoke inlet channel 520, which connects to the flushing channel 510. The baffle plate 400 can guide the water sprayed by the water spray system 200 to the water tank 300; the water spray system 200 can spray water into the flushing channel 510.

[0031] like Figure 2 and Figure 4As shown, the water-washable fume hood includes a fume extraction frame 100, on which a filter screen 110 is installed. The filter screen 110 filters the fumes passing through it, reducing the grease and particulate matter content of the fumes. The filter screen 110 is well known to those skilled in the art and will not be described in detail here. A water spray system 200 is provided above the fume extraction frame 100, which sprays water downwards. A water tank 300 is provided below the fume extraction frame 100 to collect the water sprayed by the water spray system 200. A baffle plate 400 is provided on the outside of the fume extraction frame 100. Figure 4 Water baffles 400 are installed on both the front and rear sides of the central fume extraction frame 100. The water baffles 400 are inclined, and the lower edge of the water baffles 400 extends into the water tank 300, guiding the water sprayed by the water spray system 200 into the water tank 300. There is a certain gap between the water baffles 400 and the fume extraction frame 100, forming a flushing channel 510. The gap is approximately in the range of 4 to 9 cm. Similarly, there is a certain gap between the water baffles 400 and the side wall of the water tank 300, forming a first smoke inlet channel 520. A water-washable fume hood is connected to an external exhaust pipe above the fume extraction frame 100. The exhaust pipe can discharge the gas inside the water-washable fume hood to create a negative pressure at the fume extraction frame 100.

[0032] Please see Figure 4During the operation of the water-washable fume hood, a negative pressure is created inside the hood. Oily fumes enter the hood from the outside of the baffle plate 400, passing sequentially through the first smoke inlet channel 520 and the flushing channel 510 to reach the filter screen 110. In this process, on one hand, the spray system 200 sprays water into the flushing channel 510, and the side of the baffle plate 400 near the flushing channel 510 contacts the water and cools down, resulting in a lower temperature for the baffle plate 400. When the oily fumes enter the first smoke inlet channel 520, the high-temperature fumes contact the low-temperature baffle plate 400, and some of the fumes quickly deposit on the baffle plate 400 and eventually flow slowly along the baffle plate into the water tank 300. On the other hand, the water in the water tank 300 forms a vortex-like water curtain under the negative pressure of the water-washable fume hood, creating a turbulent flow. The water creates multiple violently rolling ripples that flow up and down on the side of the baffle plate 400 near the flushing channel 510 to impact and dissolve the fumes. Some of the fumes entering the flushing channel 510 dissolve into the water curtain. Only a small portion of the fumes remains, filtered by the filter screen 110, and then directly discharged from the exhaust hood through the external exhaust pipe. The fumes processed in this way have extremely low grease and particulate matter content, preventing blockage of the water spray system 200. Simultaneously, the temperature of the fumes drops significantly, effectively avoiding the risk of subsequent fires in the pipes. Furthermore, if a fire does occur in the exhaust duct, the water in the sink 300 can effectively prevent the fire from spreading into the kitchen.

[0033] In some embodiments, such as Figure 2 and Figure 4As shown, the range hood frame 100 includes a first frame 120 and a second frame 130 connected to the first frame 120. The structural dimensions of the first frame 120 are the same as those of the second frame 130, and the first frame 120 and the second frame 130 are symmetrically distributed about the connection point of the first frame 120 and the second frame 130, which extends into the water tank 300. A gap is left between the first frame 120 and the second frame 130, and the gap forms a second smoke inlet channel 530. The second smoke inlet channel 530 is connected to the flushing channel 510 through the filter screen 110. In other words, the range hood frame 100 includes a first frame 120 and a second frame 130. The lower edge of the first frame 120 is fixedly connected to the lower edge of the second frame 130. This fixed connection can be achieved by welding, snap-fitting, etc. The first frame 120 and the second frame 130 are symmetrically distributed about the connection point of the first frame 120 and the second frame 130. A gap is left between the first frame 120 and the second frame 130, which forms a second smoke inlet channel 530. Thus, the first frame 120 and the second frame 130 together form a "V" shaped structure, that is, the second smoke inlet channel 530 gradually narrows from the upper part to the lower part of the range hood frame 100. The connection point of the first frame 120 and the second frame 130 extends into the water tank 300 to cooperate with the baffle plate 400 extending into the water tank 300. The range hood frame 100 and the baffle plate 400 together form a flushing channel 510. It is understood that the fume extraction frame 100 includes a first frame 120 and a second frame 130. The first frame 120 is located in front of the second frame 130. There are two baffles 400, which are located in front of the first frame 120 and behind the second frame 130, respectively, thus forming two flushing channels 510 and two first smoke inlet channels 520. In other words, during the operation of the water-washable fume hood, fumes can enter the water-washable fume hood from both the front and rear directions, thereby improving the efficiency of the water-washable fume hood in absorbing fumes.

[0034] Furthermore, the water-washable range hood also includes an inner side plate 610, which is fixedly connected to the side of the fume extraction frame 100 and the side of the water baffle 400. The inner side plate 610, the water baffle 400, and the fume extraction frame 100 together form a flushing channel 510, and the inner side plate 610 and the fume extraction frame 100 together form a second smoke inlet channel 530. Please refer to... Figure 2 and Figure 4The inner side plate 610 is roughly formed as a triangular structure. There are two inner side plates 610, which can be fixedly connected to the side of the fume extraction frame 100 and the side of the baffle plate 400 to close the flushing channel 510 and the second smoke inlet channel 530 from the left and right sides. This fixed connection method can be welding, snap-fit, etc. It can be understood that the fume extraction frame 100 and the baffle plate 400 can also be formed with left and right side plates. That is to say, the inner side plate 610 is integrally formed with the fume extraction frame 100 and the baffle plate 400 respectively, or the inner side plate 610, the fume extraction frame 100 and the baffle plate 400 are integrally formed together. In this arrangement, the flushing channel 510 and the second smoke inlet channel 530 can also be formed.

[0035] Further, please see Figure 1 and Figure 2 The water-washable fume hood includes a front panel 620, a back panel 630, and outer panels 640. The outer panels 640 are all located outside the inner panel 610. The front panel 620 connects to the outer panels 640, and the back panel 630 connects to the outer panels 640. The outer panels 640 and the front panel 620 form a third smoke inlet channel 540, and the outer panels 640 and the back panel 630 form a fourth smoke inlet channel 550. Fumes can enter the first smoke inlet channel 520 through the third smoke inlet channel 540 and / or the fourth smoke inlet channel 550. In other words, a front panel 620, a back panel 630, and outer panels 640 are also provided outside the inner panel 610 and the baffle plate 400. The outer panels 640 connect to the front panel 620 and the back panel 630 on their front and rear sides, respectively. Please refer to... Figure 4 It is understood that the outer side panel 640, the front panel 620, and the baffle plate 400 together form the third smoke inlet channel 540, and the outer side panel 640, the back panel 630, and the baffle plate 400 together form the fourth smoke inlet channel 550. The third smoke inlet channel 540 is located at the front of the water-washable fume hood, and the fourth smoke inlet channel 550 is located at the rear of the water-washable fume hood. When the water-washable fume hood is working, the third smoke inlet channel 540 and the fourth smoke inlet channel 550 absorb oil fumes at the front and rear of the fume hood, respectively. The oil fumes enter the first smoke inlet channel 520 through the third smoke inlet channel 540 and the fourth smoke inlet channel 550, then enter the flushing channel 510, and finally enter the second smoke inlet channel 530 through the filter screen 110 of the first frame 120 and the second frame 130, and are finally discharged to the external exhaust pipe.

[0036] In some embodiments, please refer to Figure 4The cross-sectional area of ​​the air inlet of the third smoke inlet channel 540 is smaller than that of the fourth smoke inlet channel 550. This means that cooking fumes can enter the range hood simultaneously from both the third and fourth smoke inlet channels 540 and 550. Both channels 540 and 550 are connected to external exhaust ducts. The external exhaust ducts carry away the gas from the range hood at a constant rate. Because the cross-sectional area of ​​the air inlet of the third smoke inlet channel 540 is smaller than that of the fourth smoke inlet channel 550, the negative pressure at the air inlet of the fourth smoke inlet channel 550 is greater than that at the third smoke inlet channel 540. Therefore, the gas flow rate entering from the fourth smoke inlet channel 550 per unit time is faster. Under the guidance of this negative pressure, the cooking fumes tend to flow towards the fourth smoke inlet channel 550. As a result, the cooking fumes generated by the user flow towards the fourth smoke inlet channel 550, i.e., away from the user. The third smoke inlet channel 540 is used to collect the cooking fumes that are not completely absorbed by the fourth smoke inlet channel 550, preventing the user from inhaling the fumes and protecting their respiratory health.

[0037] Furthermore, such as Figure 5 As shown, the outer side plate 640 has a guide groove on its inner side, with one end extending into the water tank 300. The guide groove can collect oil droplets deposited on the outer side plate 640 and guide them into the water tank 300. In other words, the outer side plate 640 has a guide groove at its inner lower edge, extending from the front end of the outer side plate 640 rearward and sloping downwards from front to back, with the rear end extending into the water tank 300. It is understood that... (See...) Figure 4 When fumes enter the range hood through the third smoke inlet channel 540, some of the fumes will deposit on the inner side of the outer panel 640 and form oil droplets. As the range hood is used for a longer period of time, the oil droplets gradually increase in size and slowly flow downward to the guide channel. The guide channel tilts downward and guides the oil droplets into the water tank 300 to achieve self-cleaning of the inner side of the outer panel 640. This can reduce the need for cleaning the inside of the outer panel 640 and provide users with a good cooking environment.

[0038] In addition, in some embodiments, the outer side plate 640 is provided with a guide groove at the lower edge of the inner side plate. The guide groove extends forward from the rear end of the outer side plate 640 and slopes downward from back to front. The front end of the guide groove extends into the water tank 300. When the oil fumes enter the fume hood from the fourth smoke inlet channel 550, some of the oil fumes will be deposited on the inner side of the outer side plate 640 and form oil droplets. As the fume hood is used for a longer period of time, the oil droplets gradually increase in size and slowly flow downward to the guide groove. The guide groove slopes downward and guides the oil droplets into the water tank 300 to achieve self-cleaning of the rear inner side of the outer side plate 640.

[0039] Further, please see Figure 2 and Figure 4The water spray system 200 includes a water supply pipe 210 and multiple nozzles 220. The water supply pipe 210 provides water to the nozzles 220. The multiple nozzles 220 are located in the first direction of the flushing channel 510, and the nozzles 220 are arranged at intervals. That is, in order to increase the contact area between water and oil fumes, the water spray system 200 is provided with multiple nozzles 220. In order to accommodate the two flushing channels 510, the nozzles 220 are arranged in two rows, respectively located above the two flushing channels 510, and the nozzles 220 are evenly distributed. The water spray system 200 is also provided with a water supply pipe 210, which provides water to each nozzle 220.

[0040] Additionally, in some embodiments, such as Figure 2 As shown, the water spray system 200 includes a washing tank 230, which is connected to a water supply pipe 210. The washing tank 230 contains washing liquid, which can flow through the water supply pipe 210 to the nozzle 220 and be sprayed into the flushing channel 510. It can be understood that water containing washing liquid is sprayed out through the nozzle 220 and flows into the water tank 300. Under the negative pressure of the fume hood, the water containing washing liquid forms ripples that move up and down, cleaning the baffle plate 400, the water tank 300, and the fume extraction frame 100, thus removing residual grease.

[0041] Furthermore, the water-washable fume hood includes a fan installed in a first direction on the fume extraction frame 100. The fan is capable of drawing gas from the fume extraction frame 100 to create a negative pressure at the fume extraction frame. That is, as... Figure 1 , Figure 2 and Figure 3 As shown, for the sake of simplicity in the drawing, the fan is not shown. The water-washable fume hood is equipped with a top plate 650 above the water spray system 200, which is above the second smoke inlet channel 530. The top plate 650 has a vent 651, which is used to connect the fan and the external smoke exhaust pipe. When the fan is working, it draws the gas from the second smoke inlet channel 530 and discharges it to the external smoke exhaust pipe. The second smoke inlet channel 530 forms a negative pressure, and the oil fumes enter the fume hood through the third smoke inlet channel 540 or the fourth smoke inlet channel. Then, they pass through the first smoke inlet pipe, the flushing channel 510, the filter screen 110, and the second smoke inlet channel 530 in sequence, and are finally discharged from the fume hood into the external smoke exhaust pipe.

[0042] In some embodiments, such as Figure 4 As shown, the water tank 300 includes a drain pipe 310, which is used to drain water from the water tank 300. The following describes the working process of the water-washable fume hood in detail: S1. Turn on the water-washable fume hood. The water-washable fume hood sprays water into the flushing channel 510. The water flows along the inner side of the baffle plate 400 and gathers into the water tank 300. Under the negative pressure of the water-washable fume hood, the water in the water tank 300 forms a vortex-like water curtain and impacts and dissolves the grease and oil fume particles in the fumes. After the water-washable fume hood operates in this manner for a first preset time, the water spraying device stops spraying water. S2. Under the negative pressure of the water-washing fume hood, the water in the water tank 300 continuously forms a water curtain and impacts and dissolves the grease and oil fume particles in the fumes. After the water-washing fume hood operates in this manner for a second preset time, the drain valve in the drain pipe 310 opens to discharge the wastewater in the water tank 300. S3. After the drain valve in the drain pipe 310 is opened to discharge the wastewater in the water tank 300, the washing liquid of the spray system 200 is sprayed into the flushing channel 510 through the nozzle 220. Under the negative pressure of the water-washing fume hood, the washing liquid moves up and down to flush the baffle plate 400, the water tank 300 and the fume extraction frame 100 to clean the inside of the fume hood. At the same time, the fumes can continue to enter the fume hood. After the water-washing fume hood has been running in this manner for a third preset time, the spray system 200 stops spraying. S4. Under the negative pressure of the water-washing fume hood, the washing liquid in the water tank 300 continuously forms a water curtain and impacts and dissolves the grease and oil fume particles in the fumes. After the water-washing fume hood operates in this manner for a fourth preset time, the drain valve in the drain pipe 310 opens to discharge the wastewater in the water tank 300. Then the water-washing fume hood repeats the steps of S1 above.

[0043] It is understood that in some embodiments, the washable fume hood is also provided with a cleaning button. Pressing the cleaning button can start step S3 so that the user can clean the fume hood as needed.

[0044] In some embodiments, such as Figure 1 , Figure 2 and Figure 3 As shown, the washable fume hood also includes a lampshade assembly 700, which is mounted behind the front panel 620. The lampshade assembly 700 illuminates the area below the washable fume hood. Please refer to [link / reference]. Figure 3 The lampshade assembly 700 is located at the upper front of the washable range hood, and the light emitted by it can pass through the third smoke inlet duct 540 to reach the bottom of the washable range hood so that the user can cook.

[0045] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this application. Furthermore, unless otherwise specified, the embodiments and features described in the embodiments of this application can be combined with each other.

Claims

1. A water-washable fume hood, characterized in that, include: Range hood frame, used to install the filter screen; A water spray system is used for spraying water. Water tanks are used to hold the water sprayed by the sprinkler system; A baffle plate is installed on the outside of the fume extraction frame and a gap is left between the baffle plate and the fume extraction frame, which forms a flushing channel. Wherein, one end of the baffle plate extends into the water tank, and there is a gap between the baffle plate and the water tank, which forms a first smoke inlet channel. The first smoke inlet channel is connected to the flushing channel, and the baffle plate can guide the water sprayed by the water spraying system to the water tank. The water spray system is capable of spraying water into the flushing channel.

2. The water-washable fume hood according to claim 1, characterized in that, The range hood frame includes a first frame and a second frame connected to the first frame. The first frame has the same structural dimensions as the second frame, and the first frame and the second frame are symmetrically distributed about the connection point between the first frame and the second frame, which extends into the water tank.

3. The water-washable fume hood according to claim 2, characterized in that, A gap is left between the first frame and the second frame, forming a second smoke inlet channel, which is connected to the flushing channel through the filter screen.

4. The water-washable fume hood according to claim 3, characterized in that, It includes an inner side plate, which is fixedly connected to the side of the fume extraction frame and the side of the water baffle. The inner side plate, the water baffle, and the fume extraction frame together form the flushing channel, and the inner side plate and the fume extraction frame together form the second smoke inlet channel.

5. The water-washable fume hood according to claim 4, characterized in that, It includes a front panel, a back panel, and an outer panel. The outer panels are all located outside the inner panel. The front panel is connected to the outer panels, and the back panel is connected to the outer panels. The outer panels and the front panel form a third smoke inlet channel, and the outer panels and the back panel form a fourth smoke inlet channel. Oil fumes can enter the first smoke inlet channel through the third smoke inlet channel and / or the fourth smoke inlet channel.

6. The water-washable fume hood according to claim 5, characterized in that, The cross-sectional area of ​​the air inlet of the third smoke inlet channel is smaller than that of the air inlet of the fourth smoke inlet channel.

7. The water-washable fume hood according to claim 5, characterized in that, The outer side plate has a guide groove on its inner side, one end of which extends into the water tank. The guide groove can receive the oil droplets deposited on the outer side plate and guide the oil droplets into the water tank.

8. The water-washable fume hood according to claim 1, characterized in that, The water spraying system includes a water supply pipe and multiple nozzles. The water supply pipe can supply water to the nozzles. The multiple nozzles are located in a first direction of the flushing channel, and the nozzles are spaced apart.

9. The water-washable fume hood according to claim 8, characterized in that, The water spray system includes a washing tank connected to the water supply pipe. The washing tank contains washing liquid, which can flow through the water supply pipe to the nozzle and be sprayed into the flushing channel through the nozzle.

10. The water-washable fume hood according to claim 1, characterized in that, Includes a fan, which is installed in a first direction of the fume extraction frame, and the fan is capable of drawing gas from the fume extraction frame to create a negative pressure at the fume extraction frame.

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