A range hood

Abstract

The present application relates to a kind of range hood, including machine body, installation cavity is formed in machine body, fan system is equipped in installation cavity, oil fume entrance is equipped on machine body, filter screen module assembly is equipped at oil fume entrance, it is characterized in that: one side of filter screen module assembly is equipped with for cleaning filter screen module self-cleaning module, the self-cleaning module includes cleaning support, inlet and outlet are equipped on cleaning support;Cleaning support is equipped with cleaning water outlet;Cleaning support is equipped with cleaning assembly, cleaning assembly has following two working conditions: the first working condition of blocking water flow so that water flow cannot flow through the cleaning water outlet, and the second working condition of making water flow flow through the cleaning water outlet;Water tank and water pump.Compared with prior art, the advantages of the present application are that: by being equipped with self-cleaning module in one side of filter screen module assembly, filter screen module can be cleaned;The cleaning assembly in the cleaning support in self-cleaning module makes filter screen cleaning function control more convenient.

Description

Technical Field

[0001] This invention relates to a range hood. Background Technology

[0002] As an essential kitchen appliance in every household, range hoods are used very frequently, their main function being to remove the fumes produced during cooking. Over time, grease accumulates on the impeller surface, volute, and inside the fan frame. This grease buildup affects the performance of the fan system, leading to reduced fume extraction and increased noise. Furthermore, the grease buildup can cause unpleasant odors, impacting the kitchen environment. Therefore, range hoods require regular cleaning and maintenance every one to two years.

[0003] Currently, the main technical solution to reduce pollution inside range hoods is to design relatively efficient filters for static filtration at the front end of the hood. This primarily involves installing a static, high-density, small-pore filter, a double-layer filter, or a snap-fit ​​S-shaped filter at the air inlet. However, with this static filtration solution, the probability of oil fumes colliding with the filter is fixed and low because the filter is statically installed. Therefore, the filtration efficiency is relatively low. Even with specialized design, the filter's thickness is limited by the structure, resulting in a short filtration path and thus limited filtration effectiveness. Furthermore, the filtration effect of static filters decreases significantly at higher temperatures and when oil fume particles are smaller.

[0004] Another solution is to install a rotating dynamic mesh disc at the front end of the fan system's air inlet to filter and intercept most of the oil and grease before it reaches the fan system. There are typically two types of drive mechanisms for this dynamic mesh disc: one connects the dynamic mesh disc to the motor shaft of the main motor of the range hood. This type of dynamic mesh disc rotates at a high speed, resulting in noticeable noise during operation. Additionally, the dynamic mesh disc is relatively thin and lacks rigidity, making it prone to deformation and collisions with the volute casing. Furthermore, it requires a high degree of coaxiality from the rotating mesh disc. The other type uses a separate drive motor to drive the dynamic mesh disc. While a separate motor drive can control the rotation speed, it requires a control circuit and increases the overall energy consumption of the machine.

[0005] In addition, few existing range hoods are equipped with a self-cleaning device that can clean the dynamic filter module. Summary of the Invention

[0006] The first technical problem to be solved by the present invention is to provide a range hood that can clean and control the filter module assembly in accordance with the above-mentioned prior art.

[0007] The second technical problem to be solved by the present invention is to provide a range hood that uses the same drive mechanism to both start cleaning the filter module assembly and drive the filter module assembly to rotate, in contrast to the above-mentioned prior art.

[0008] The technical solution adopted by the present invention to solve the first technical problem mentioned above is as follows: a range hood, including a body, an installation cavity formed in the body, a fan system installed in the installation cavity, an oil fume inlet communicating with the installation cavity on the body, and a filter module assembly installed at the oil fume inlet, characterized in that: a self-cleaning module for cleaning the filter module is provided on one side of the filter module assembly, the self-cleaning module comprising:

[0009] The cleaning bracket has a water flow channel inside, and an inlet and an outlet connected to the water flow channel. The cleaning bracket also has a cleaning spray nozzle connected to the water flow channel and facing the filter module assembly. A cleaning component is installed inside the water flow channel of the cleaning bracket. The cleaning component has two working states: a first working state that blocks the water flow so that the water cannot flow through the cleaning spray nozzle, and a second working state that allows the water to flow through the cleaning spray nozzle.

[0010] A water tank, which has an inlet and an outlet.

[0011] The water pump has its inlet connected to the outlet of the water tank, its outlet connected to the inlet of the cleaning bracket, and its outlet connected to the inlet of the water tank. After the water pump is started, water is pumped from the water tank into the water flow channel of the cleaning bracket and sprayed out through the cleaning nozzle.

[0012] As an improvement, the cleaning assembly includes:

[0013] A cleaning fixing plate is installed at the cross-section of the water flow channel of the cleaning bracket, and water flow perforations are provided on the cleaning fixing plate.

[0014] The cleaning sliding plate is sealed at the cross-section of the water flow channel of the cleaning bracket. The cleaning sliding plate and the cleaning fixed plate are spaced apart. Water entering the water flow channel from the water inlet of the cleaning bracket can flow into the space between the cleaning fixed plate and the cleaning sliding plate through the water flow perforation on the cleaning fixed plate, but cannot cross the cleaning sliding plate.

[0015] The temperature-sensitive elastic element has two ends connected to the cleaning fixed plate and the cleaning sliding plate, respectively.

[0016] When the water temperature in the water flow channel is less than or equal to the deformation temperature of the temperature-sensitive elastic element, the temperature-sensitive elastic element is in its normal state, and the cleaning nozzle is located outside the area enclosed by the cleaning fixed plate and the cleaning sliding plate. At this time, the cleaning sliding plate blocks the water flow entering the water flow channel, preventing the water flow from passing through the cleaning nozzle. When the water temperature in the water flow channel is greater than the deformation temperature of the temperature-sensitive elastic element, the temperature-sensitive elastic element deforms under the action of water pressure. At this time, the cleaning nozzle is located within the area enclosed by the cleaning fixed plate and the cleaning sliding plate, and the water flow passes through the cleaning nozzle and is sprayed out.

[0017] In a further improvement, the self-cleaning module is located on the upper side of the filter module assembly, and the cleaning spray nozzle is located on the lower side of the cleaning bracket and directly opposite the filter module assembly; the upper side of the cleaning bracket is provided with a water mist spray nozzle that communicates with the water flow channel, and an atomizing spray head is installed inside the water mist spray nozzle.

[0018] Further improvements include the addition of a spray assembly within the water flow channel of the cleaning bracket, which has the following two operating states:

[0019] First working state: Blocking water flow to prevent water from flowing through the water mist spray nozzle;

[0020] Second working state: Water flows through the water mist spray nozzle.

[0021] Further improvements include:

[0022] A spray fixing plate is installed at the cross-section of the water flow channel of the cleaning bracket, and the spray fixing plate is provided with water flow perforations;

[0023] The spray sliding plate is sealed at the cross-section of the water flow channel of the cleaning bracket. The spray sliding plate and the spray fixed plate are spaced apart. Water entering the water flow channel from the water inlet of the cleaning bracket can flow into the space between the spray fixed plate and the spray sliding plate through the water flow perforation on the spray fixed plate, but cannot cross the spray sliding plate.

[0024] The elastic element has two ends connected to the spray fixing plate and the spray sliding plate, respectively.

[0025] When the water pressure in the water flow channel is less than the preset value, the elastic element is in its normal state, and the water mist nozzle is located outside the area enclosed by the spray fixing plate and the spray sliding plate. At this time, the spray sliding plate blocks the water flow entering the water flow channel, preventing the water flow from passing through the water mist nozzle. When the water pressure in the water flow channel is greater than the preset value, the elastic element deforms under the action of water pressure. At this time, the water mist nozzle is located within the area enclosed by the spray fixing plate and the spray sliding plate, and the water flow passes through the water mist nozzle and is sprayed out.

[0026] In a further improvement, the cleaning bracket includes a hollow first cleaning tube, with the water inlet of the cleaning bracket located in the middle of the first cleaning tube. Inside the first cleaning tube, a set of cleaning components and a set of spray components are respectively arranged on both sides of the water inlet. The cleaning fixing plate of the cleaning component is located near the water inlet in the middle, and the spray fixing plate of the spray component is also located near the water inlet in the middle.

[0027] In a further improvement, the cleaning bracket also includes a hollow second cleaning tube, which is arranged parallel to and spaced apart from the first cleaning tube. The outlet of the cleaning bracket is located in the middle of the second cleaning tube, and the second cleaning tube and the first cleaning tube are connected by a hollow branch pipe. Inside the first cleaning tube, a set of cleaning components and a set of spray components are respectively arranged on both sides of the outlet. The inlet of the cleaning sliding plate of the cleaning component is located in the middle, and the spray sliding plate of the spray component is also located near the inlet in the middle.

[0028] Further improvements include the provision of multiple cleaning nozzles, spaced apart along the length of the first and second cleaning pipes; and multiple water mist spray nozzles, also spaced apart along the length of the first and second cleaning pipes.

[0029] Further improvements include arranging the cleaning nozzles on the first and second cleaning pipes diagonally to the water mist nozzles on the first and second cleaning pipes.

[0030] In a further improvement, the branch pipe is provided with two pipes, which together with the first cleaning pipe and the second cleaning pipe form an installation cavity, and a driving device is provided in the installation cavity.

[0031] The filter module assembly is connected to a filter rotation shaft;

[0032] The drive device is connected to the filter rotation shaft of the filter module assembly and is used to drive the filter module assembly to rotate around the filter rotation shaft.

[0033] The technical solution adopted by the present invention to solve the second technical problem mentioned above is as follows: the driving device includes:

[0034] A water turbine drive assembly is provided, with a water turbine shaft connected to it, and an inlet and an outlet connected to it. The outlet of the water pump is connected to the inlet of the water turbine drive assembly, and the outlet of the water turbine drive assembly is connected to the inlet of the cleaning bracket.

[0035] The water turbine shaft is connected to the transmission gear set, and the filter screen rotation shaft is also connected to the transmission gear set.

[0036] After the water pump starts, water is pumped out of the water tank and first enters the water turbine drive assembly, which drives the water turbine shaft of the water turbine drive assembly to rotate. After the water turbine shaft on the water turbine drive assembly rotates, it drives the filter screen rotating shaft to rotate through the transmission gear set. At the same time, the water flows through the outlet of the water turbine drive assembly into the inlet of the cleaning bracket, and then flows back to the water tank through the outlet of the cleaning bracket.

[0037] In a further improvement, the drive device also includes an overflow valve, which is installed on the pipeline connecting the outlet of the cleaning bracket and the inlet of the water tank.

[0038] In a further improvement, the drive device also includes a heating module, which is installed on the pipeline between the outlet of the water pump and the inlet of the water turbine drive assembly.

[0039] Further improvements include an oil fume concentration sensor located on the lower side of the machine body, and a control board located inside the machine body; the water pump's operating flow rate includes full speed and half speed; the overflow valve's opening angle includes small and large settings; the oil fume concentration sensor, water pump, and heating components are all communicatively connected to the control board, and their operating status is controlled by the control board.

[0040] When the filter module needs to be cleaned, the control board controls the heating component to turn on, and at the same time, the control board turns on the water pump to run at half speed or full speed. The control board also turns on the overflow valve to set the overflow valve to low or high position.

[0041] Furthermore, during the operation of the aforementioned range hoods:

[0042] If the oil fume concentration detected by the oil fume concentration sensor is less than the first preset value, the control board will shut down both the water pump and the overflow valve.

[0043] If the oil fume concentration is greater than or equal to the first preset value but less than the second preset value, the control panel will turn on the water pump and make it run at half speed. The control panel will also control the overflow valve to open and make the overflow valve open at the low setting.

[0044] If the oil fume concentration is greater than or equal to the second preset value, the control panel will turn on the water pump to make the water pump run at full flow rate, and the control panel will control the overflow valve to open, and the opening position of the overflow valve will be set to the high position.

[0045] Further improvements include the addition of a first airflow sensor and a second airflow sensor on the front and rear sides of the filter module assembly, which are also connected to the control board. During operation, the degree of blockage in the filter module assembly is determined based on the airflow difference between the two airflow sensors. When the blockage reaches a certain value, the cleaning process of the filter module assembly is initiated. At this time, the control board controls the heating component to turn on and simultaneously activates the water pump, allowing it to operate at half or full flow rate. The control board also activates the overflow valve, setting its opening position to either low or high.

[0046] Compared with the prior art, the advantages of the present invention are: by providing a self-cleaning module on one side of the filter module assembly, the filter module can be cleaned; the cleaning component in the cleaning bracket of the self-cleaning module has the following two working states: a first working state that blocks the water flow so that the water flow cannot pass through the cleaning nozzle, and a second working state that allows the water flow to pass through the cleaning nozzle, making the filter cleaning function more convenient to control. Attached Figure Description

[0047] Figure 1 This is a schematic diagram of the structure of the range hood in an embodiment of the present invention.

[0048] Figure 2 This is a schematic diagram of the internal structure of the range hood in an embodiment of the present invention.

[0049] Figure 3 This is a schematic diagram of the filter module assembly in an embodiment of the present invention.

[0050] Figure 4 This is a structural schematic diagram of the filter module assembly from another perspective in an embodiment of the present invention.

[0051] Figure 5 This is a schematic diagram of the structure of the filter module assembly, self-cleaning module, and drive device in an embodiment of the present invention.

[0052] Figure 6 This is a partial structural diagram of the filter module assembly, self-cleaning module, and drive device in an embodiment of the present invention.

[0053] Figure 7 This is a cross-sectional view of the connection between a portion of the driving device and the filter module assembly in an embodiment of the present invention.

[0054] Figure 8 This is a schematic diagram of the cleaning bracket in an embodiment of the present invention.

[0055] Figure 9 This is a schematic diagram of the internal structure of the cleaning bracket in an embodiment of the present invention.

[0056] Figure 10This is a schematic diagram of the water circuit principle in the first cleaning pipe of the present invention, showing the water mist spray nozzle partially open and partially closed, and the cleaning spray nozzles fully closed.

[0057] Figure 11 This is a schematic diagram of the water circuit principle in the second cleaning pipe of the present invention, showing the water mist spray nozzle partially open and partially closed, and the cleaning spray nozzle fully closed.

[0058] Figure 12 This is a schematic diagram of the water mist spray range when the water mist nozzle is partially open and partially closed in an embodiment of the present invention.

[0059] Figure 13 This is a schematic diagram of the water circuit principle when all water mist spray nozzles and all cleaning spray nozzles in the first cleaning pipe are open in an embodiment of the present invention.

[0060] Figure 14 This is a schematic diagram of the water circuit principle when all water mist spray nozzles and all cleaning spray nozzles in the second cleaning pipe are open in an embodiment of the present invention.

[0061] Figure 15 This is a schematic diagram showing the water mist spray range and cleaning spray range when both the water mist spray nozzle and the cleaning spray nozzle are fully open in an embodiment of the present invention. Detailed Implementation

[0062] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0063] like Figure 1 , 2 The range hood shown includes a body 100, an installation cavity 101 formed within the body 100, a fan system 102 installed within the installation cavity 101, an oil fume inlet communicating with the installation cavity 101 on the body 100, a filter module assembly 1 installed at the oil fume inlet, a smoke guide plate 103 and an oil cup 104 connected to the body on the lower side of the filter module assembly 1, a filter rotation shaft 2 connected to the upper side of the filter module assembly 1, a drive device for driving the filter module assembly 1 to rotate, and a self-cleaning module for cleaning the filter module assembly.

[0064] In this embodiment, the filter module assembly 1 includes a first-stage filter 11 disposed on the lower side, and a second-stage filter 12 disposed above the first-stage filter and spaced apart from it. See [link to documentation]. Figure 3 , 4As shown, the middle parts of the first-stage filter 11 and the second-stage filter 12 are both fixedly connected to the filter rotation shaft 2, which is connected to the drive device. The first-stage filter 11 is fan-shaped, comprising multiple sets of blades radiating outwards from the center. The second-stage filter 12 is circular. The filter rotation shaft has external threads, and the second-stage filter 12 is fixedly connected to the filter rotation shaft 2 via a washer 13 and a nut 14. The middle part of the first-stage filter 11 has a connecting groove with internal threads, allowing the first-stage filter 11 to be directly threaded to the filter rotation shaft 2, with the thread tightening direction between the first-stage filter 11 and the filter rotation shaft 2 opposite to the rotation direction of the filter rotation shaft 2. The upper and / or lower surfaces of the second-stage filter 12 are provided with a support frame 15. Due to the support frame 15, the material of the second-stage filter 12 can be foamed sponge or a porous metal plate, while the material of the first-stage filter 11 can be porous metal or a machined metal part.

[0065] The driving device in this embodiment is referred to as follows. Figure 5 , 6 As shown in Figure 7, it includes:

[0066] A water turbine drive assembly 31 is provided, on which a water turbine shaft 311 is connected, and an inlet and an outlet are connected.

[0067] The transmission gear set includes a first bevel gear 32 and a second bevel gear 33. The first bevel gear 31 is connected to the water turbine shaft 311, and the first bevel gear 32 and the second bevel gear 33 mesh. The filter screen rotating shaft 2 is connected to the second bevel gear 33. The water turbine drive assembly 31 drives the water turbine shaft 311 to rotate under the water flow pressure. After the water turbine shaft 311 rotates, it drives the filter screen rotating shaft 2 to rotate through the transmission of the first bevel gear 32 and the second bevel gear 33, thereby driving the filter screen module assembly 1 to rotate.

[0068] The water turbine drive mounting box 34, the water turbine drive assembly 31 and the transmission gear set are all installed inside the water turbine drive mounting box 34;

[0069] Water tank 35, which is equipped with an inlet and an outlet;

[0070] Water pump 36 has its inlet end connected to the outlet end of the water tank, and its outlet end connected to the inlet end of the water turbine drive assembly 3. The outlet end of the water turbine drive assembly 3 is connected to the inlet end of the water tank 7. After the water pump 36 is started, water is pumped out of the water tank and into the water turbine drive assembly 3, driving the water turbine shaft 31 of the water turbine drive assembly 3, and flowing back to the water tank through the outlet end of the water turbine drive assembly.

[0071] Overflow valve 37 is installed on the pipeline connecting the outlet of the water turbine drive assembly 31 and the inlet of the water tank 35.

[0072] Heating module 38 is installed on the pipeline between the outlet of water pump 36 and the inlet of water turbine drive assembly 31. Heating module 38 can be a miniature boiler with heating tube or heating film inside.

[0073] The self-cleaning module in this embodiment is referred to Figure 5 , 6 As shown in 8 and 9, it includes:

[0074] The cleaning bracket 4 includes a hollow first cleaning pipe 41 and a hollow second cleaning pipe 42. The second cleaning pipe 42 and the first cleaning pipe 41 are of the same length and are arranged in parallel at intervals. Both the second cleaning pipe 42 and the first cleaning pipe 41 are square tubes, and both ends of the second cleaning pipe 42 and the first cleaning pipe 41 are sealed with end caps. The water inlet B of the cleaning bracket is set in the middle of the first cleaning pipe 41, and the water outlet C of the cleaning bracket is set in the middle of the second cleaning pipe 42. The water outlet of the water turbine drive assembly 3 is connected to the water inlet B of the cleaning bracket 4, and the water outlet C of the cleaning bracket is connected to one end of the overflow valve 37. The other end of the overflow valve 37 is connected to the water inlet of the water tank 35. After the water pump 36 is started, it pumps water out of the water tank, first through the heating module 38, then into the water turbine drive assembly 3, and then into the cleaning bracket 4. The water coming out of the cleaning bracket flows back to the water tank after passing through the overflow valve 37 to achieve water circulation. The second cleaning pipe 42 and the first cleaning pipe 41 are connected by two parallel, spaced-apart hollow branch pipes 43 and 44; the two branch pipes 43 and 44 together with the first cleaning pipe 41 and the second cleaning pipe 42 form an installation cavity A, and the water turbine drive installation box 34 is fixedly installed in the installation cavity A; the water turbine drive installation box 34 is generally located at the upper middle part of the filter module assembly 1.

[0075] The first cleaning pipe 41 has multiple cleaning nozzles 411 arranged along the length of the first cleaning pipe 41 below the water inlet B side. In this embodiment, there are three nozzles. See [link to relevant documentation]. Figure 8 , 9 As shown in Figure 10, the first cleaning pipe 41 has multiple water mist spray nozzles distributed along its length direction above the opposite side of the inlet B. In this embodiment, there are three nozzles. Atomizing nozzles 45 are installed inside each water mist spray nozzle. Correspondingly, the second cleaning pipe 42 has multiple cleaning nozzles 421 distributed along its length direction below the outlet C. In this embodiment, there are three nozzles. The second cleaning pipe 42 also has multiple water mist spray nozzles distributed along its length direction above the opposite side of the outlet C. In this embodiment, there are also three nozzles. Atomizing nozzles 45 are also installed inside each water mist spray nozzle. See [reference needed]. Figure 8 , 9As shown in Figure 11, the cleaning nozzles 411 on the first cleaning pipe 41 and the cleaning nozzles 421 on the second cleaning pipe 42 are arranged diagonally to the water mist spray nozzles on the first and second cleaning pipes. Furthermore, a set of cleaning components 5 and a set of spray components 6 are respectively installed on both sides of the inlet of the first cleaning pipe 41, and a set of cleaning components 5 and a set of spray components 6 are also respectively installed on both sides of the outlet of the second cleaning pipe 42. The cleaning components 5 in the first cleaning pipe 41 and the second cleaning pipe 42 are also arranged diagonally to the spray components 6 in the first and second cleaning pipes.

[0076] Cleaning component 5 includes:

[0077] Cleaning fixing plate 51 is fixedly installed at the inner section of the first cleaning pipe 41 or the second cleaning pipe 42. Water flow perforation 511 is provided on the cleaning fixing plate 51.

[0078] The cleaning sliding plate 52 is sealed and slidably disposed at the internal cross section of the first cleaning pipe 41 or the second cleaning pipe 42. The cleaning sliding plate 52 is spaced apart from the cleaning fixed plate 51. Water entering from the water inlet B of the cleaning bracket can flow into the space between the cleaning fixed plate 51 and the cleaning sliding plate 52 through the water flow perforation 511 on the cleaning fixed plate 51, but cannot cross the cleaning sliding plate 52.

[0079] Temperature-sensitive elastic element 53, with its two ends connected to the cleaning fixed plate and the cleaning sliding plate, respectively;

[0080] When water enters the cleaning bracket 4 through inlet B, and the water temperature flowing between the cleaning fixed plate 51 and the cleaning sliding plate 52 is less than or equal to the deformation temperature of the temperature-sensitive elastic element 53, the temperature-sensitive elastic element 53 is in its normal state. The cleaning nozzles 411 on the first cleaning pipe 41 and 421 on the second cleaning pipe 42 are respectively located outside the area enclosed by the cleaning fixed plate 51 and the cleaning sliding plate 52 in the two sets of cleaning components 5. At this time, the cleaning sliding plate 52 blocks the water flow between the cleaning fixed plate 51 and the cleaning sliding plate 52, preventing the water from flowing through. The first cleaning pipe 41 has a cleaning nozzle 411, and the second cleaning pipe 42 has a cleaning nozzle 421. When the water temperature flowing between the cleaning fixed plate 51 and the cleaning sliding plate 52 is greater than the deformation temperature of the temperature-sensitive elastic element 53, the temperature-sensitive elastic element 53 deforms under the action of water pressure. The cleaning nozzles 411 on the first cleaning pipe 41 and 421 on the second cleaning pipe 42 are respectively set in the area enclosed by the cleaning fixed plate 51 and the cleaning sliding plate 52 in the two sets of cleaning components 5. Water can flow through the cleaning nozzles 411 and spray out.

[0081] The spray assembly 6 includes:

[0082] A spray fixing plate 61 is fixedly installed at the internal section of the first cleaning pipe 41 or the second cleaning pipe 42. The spray fixing plate is provided with water flow perforations 611.

[0083] The spray sliding plate 62 is sealed and slidably disposed at the internal cross section of the first cleaning pipe 41 or the second cleaning pipe 42. The spray sliding plate 62 is spaced apart from the spray fixing plate 61. Water entering from the water inlet B of the cleaning bracket can flow into the space between the spray fixing plate 61 and the spray sliding plate 62 through the water flow perforation 611 on the spray fixing plate 61, but cannot cross the spray sliding plate 62.

[0084] The elastic element 63 has two ends connected to the spray fixing plate 61 and the spray sliding plate 62, respectively.

[0085] When water enters the cleaning bracket 4 through the inlet B, and the water pressure inside the cleaning bracket 4 is less than a preset value, the elastic element 63 is in its normal state, and the water mist spray nozzle is located outside the area enclosed by the spray fixing plate 61 and the spray sliding plate 62. At this time, the spray sliding plate 62 blocks the water flow, preventing the water flow from passing through the water mist spray nozzle. When the water pressure inside the cleaning bracket 4 is greater than the preset value, the elastic element 63 deforms under the action of water pressure. At this time, the water mist spray nozzle is located within the area enclosed by the spray fixing plate 61 and the spray sliding plate 62, and the water flow passes through the water mist spray nozzle and is sprayed out.

[0086] In this embodiment, the self-cleaning module can spray water mist upwards or water streams downwards depending on different working conditions. Spraying water mist filters oil fumes, while spraying water streams cleans the filter module components. Since the water mist nozzles and cleaning nozzles are arranged diagonally on the cleaning bracket 4, and the water inlet directions on the first cleaning pipe 41 and the second cleaning pipe 42 are different, the cleaning component in the first cleaning pipe 41 has water inlet from the left side, and the cleaning component in the second cleaning pipe 42 has water inlet from the right side. Similarly, the spray component 6 has water inlet from the right side in the first cleaning pipe 41, and the spray component 6 has water inlet from the left side in the second cleaning pipe 42. (Refer to...) Figure 8 This arrangement is designed to achieve cleaner cleaning with less water.

[0087] Taking the spray assembly 6 in the second cleaning pipe 42 at the lower left corner and the spray assembly 6 in the first cleaning pipe 41 at the upper right corner as examples, when the water pressure is low, the elastic element 63 will move along the water flow direction under the action of the water pressure. At this time, the two water mist spray nozzles near the middle of the cleaning bracket 4 will first enter the area enclosed by the spray fixing plate 61 and the spray sliding plate 62. See Figure 10 , 11As shown, at this time, the two atomizing nozzles 45 near the middle of the cleaning bracket 4 will spray upwards. The spray range of the two atomizing nozzles 45 is shown in the figure. Figure 12 The circle shown indicates the area of ​​the spray; as the water pressure increases, the spray range gradually expands. Further increasing the pressure causes all water mist nozzles to enter the area enclosed by the spray fixing plate 61 and the spray sliding plate 62. (See [reference needed]). Figure 13 , 14 As shown, the spray range that the six atomizing nozzles 45 can spray at this time is shown in the figure. Figure 15 As shown.

[0088] The setting principle of the cleaning component is roughly the same as that of the spray component. The only difference is that the cleaning component 5 and the spray component 6 need to be activated under different working conditions. The main principle is that the temperature-sensitive elastic element 53 and the ordinary elastic element 63 are activated based on the difference in the temperature they sense. When the oil fume concentration is high and the spray component needs to be activated, the water flow pressure is changed. In this way, the elastic element 63 of the spray component will move under the force of water pressure, so that the spray hole is connected to the water channel and water mist is generated. When the filter module does not need to be cleaned by spraying water, the heating module is not activated. The water temperature entering the cleaning bracket is insufficient to cause deformation of the temperature-sensitive elastic element 53 (or the deformation is insufficient to connect the cleaning nozzle 411 to the water path). When the cleaning assembly is needed, it is usually for cleaning the filter module assembly. At this time, the heating module will activate, and the water temperature in the water tank and water path will be heated to a temperature greater than the deformation temperature of the temperature-sensitive elastic element 53 through water pump circulation. At this time, the temperature-sensitive elastic element 53 in the cleaning assembly will displace under high temperature as the water pressure increases, thereby connecting the water path to the cleaning nozzle 411 to clean the filter assembly. The cleaning range of the cleaning assembly can also be found in [reference needed]. Figure 11 , 14 As shown. Under the action of high-pressure water, the water mist component will also start. At this time, the fan can be controlled to operate at intervals, so that the hot water mist adheres to the impeller, softening the oil stains on the impeller. Combined with the rotation of the impeller, it will have a certain cleaning effect on the impeller.

[0089] In this embodiment, a water circuit drive mechanism consisting of the same water tank, water pump, and overflow valve is used to control the opening and closing of the heating module. This mechanism can both start cleaning the filter module assembly and drive the filter module assembly to rotate. It is convenient to use, easy to control, and cost-effective.

Claims

1. A range hood, comprising a body, an installation cavity formed within the body, a fan system disposed within the installation cavity, an oil fume inlet communicating with the installation cavity on the body, a filter module assembly disposed at the oil fume inlet, and an oil cup connected to the body on the lower side of the filter module assembly, characterized in that: One side of the filter module assembly is provided with a self-cleaning module for cleaning the filter module, the self-cleaning module comprising: The cleaning bracket has a water flow channel inside, and an inlet and an outlet connected to the water flow channel. The cleaning bracket also has a cleaning spray nozzle connected to the water flow channel and facing the filter module assembly. A cleaning component is installed inside the water flow channel of the cleaning bracket. The cleaning component has two working states: a first working state that blocks the water flow so that the water cannot flow through the cleaning spray nozzle, and a second working state that allows the water to flow through the cleaning spray nozzle. A water tank, which has an inlet and an outlet. The water pump has its inlet connected to the outlet of the water tank, its outlet connected to the inlet of the cleaning bracket, and its outlet connected to the inlet of the water tank. After the water pump is started, water is pumped from the water tank into the water flow channel of the cleaning bracket and sprayed out through the cleaning nozzle. The cleaning assembly includes: A cleaning fixing plate is installed at the cross-section of the water flow channel of the cleaning bracket, and water flow perforations are provided on the cleaning fixing plate. The cleaning sliding plate is sealed at the cross-section of the water flow channel of the cleaning bracket. The cleaning sliding plate and the cleaning fixed plate are spaced apart. Water entering the water flow channel from the water inlet of the cleaning bracket can flow into the space between the cleaning fixed plate and the cleaning sliding plate through the water flow perforation on the cleaning fixed plate, but cannot cross the cleaning sliding plate. The temperature-sensitive elastic element has two ends connected to the cleaning fixed plate and the cleaning sliding plate, respectively. When the water temperature in the water flow channel is less than or equal to the deformation temperature of the temperature-sensitive elastic element, the temperature-sensitive elastic element is in its normal state, and the cleaning nozzle is located outside the area enclosed by the cleaning fixed plate and the cleaning sliding plate. At this time, the cleaning sliding plate blocks the water flow entering the water flow channel, preventing the water flow from passing through the cleaning nozzle. When the water temperature in the water flow channel is greater than the deformation temperature of the temperature-sensitive elastic element, the temperature-sensitive elastic element deforms under the action of water pressure. At this time, the cleaning nozzle is located within the area enclosed by the cleaning fixed plate and the cleaning sliding plate, and the water flow passes through the cleaning nozzle and is sprayed out.

2. The range hood according to claim 1, characterized in that: The self-cleaning module is located on the upper side of the filter module assembly, and the cleaning spray nozzle is located on the lower side of the cleaning bracket and directly facing the filter module assembly; the upper side of the cleaning bracket is provided with a water mist spray nozzle that communicates with the water flow channel, and an atomizing spray head is installed inside the water mist spray nozzle.

3. The range hood according to claim 2, characterized in that: The cleaning bracket is equipped with a spray assembly within its water flow channel. The spray assembly has the following two operating states: First working state: Blocking water flow to prevent water from flowing through the water mist spray nozzle; Second working state: Water flows through the water mist spray nozzle.

4. The range hood according to claim 3, characterized in that: The spray assembly includes: A spray fixing plate is installed at the cross-section of the water flow channel of the cleaning bracket, and the spray fixing plate is provided with water flow perforations; The spray sliding plate is sealed at the cross-section of the water flow channel of the cleaning bracket. The spray sliding plate and the spray fixed plate are spaced apart. Water entering the water flow channel from the water inlet of the cleaning bracket can flow into the space between the spray fixed plate and the spray sliding plate through the water flow perforation on the spray fixed plate, but cannot cross the spray sliding plate. The elastic element has two ends connected to the spray fixing plate and the spray sliding plate, respectively. When the water pressure in the water flow channel is less than the preset value, the elastic element is in its normal state, and the water mist nozzle is located outside the area enclosed by the spray fixing plate and the spray sliding plate. At this time, the spray sliding plate blocks the water flow entering the water flow channel, preventing the water flow from passing through the water mist nozzle. When the water pressure in the water flow channel is greater than the preset value, the elastic element deforms under the action of water pressure. At this time, the water mist nozzle is located within the area enclosed by the spray fixing plate and the spray sliding plate, and the water flow passes through the water mist nozzle and is sprayed out.

5. The range hood according to claim 4, characterized in that: The cleaning bracket includes a hollow first cleaning tube with a water inlet in the middle. Inside the first cleaning tube, a cleaning assembly and a spray assembly are respectively arranged on both sides of the water inlet. The cleaning fixing plate of the cleaning assembly is located near the water inlet in the middle, and the spray fixing plate of the spray assembly is also located near the water inlet in the middle.

6. The range hood according to claim 5, characterized in that: The cleaning bracket also includes a hollow second cleaning tube, which is arranged parallel to and spaced apart from the first cleaning tube. The outlet of the cleaning bracket is located in the middle of the second cleaning tube, and the second cleaning tube and the first cleaning tube are connected by a hollow branch pipe. Inside the first cleaning tube, a set of cleaning components and a set of spray components are respectively arranged on both sides of the outlet. The inlet of the cleaning sliding plate of the cleaning component is located in the middle, and the spray sliding plate of the spray component is also located near the inlet in the middle.

7. The range hood according to claim 6, characterized in that: Multiple cleaning nozzles are provided, spaced apart along the length of the first and second cleaning pipes; multiple water mist spray nozzles are also provided, similarly spaced apart along the length of the first and second cleaning pipes.

8. The range hood according to claim 7, characterized in that: The cleaning nozzles on the first cleaning pipe and the cleaning nozzles on the second cleaning pipe are arranged diagonally to the water mist spray nozzles on the first cleaning pipe and the water mist spray nozzles on the second cleaning pipe.

9. The range hood according to claim 6, characterized in that: The branch pipe has two branches, and the two branch pipes, together with the first cleaning pipe and the second cleaning pipe, form an installation cavity, in which a driving device is installed. The filter module assembly is connected to a filter rotation shaft; The drive device is connected to the filter rotation axis of the filter module assembly and is used to drive the filter module assembly to rotate around the filter rotation axis.

10. The range hood according to claim 9, characterized in that... The driving device includes: A water turbine drive assembly is provided, with a water turbine shaft connected to it, and an inlet and an outlet connected to it. The outlet of the water pump is connected to the inlet of the water turbine drive assembly, and the outlet of the water turbine drive assembly is connected to the inlet of the cleaning bracket. The water turbine shaft is connected to the transmission gear set, and the filter screen rotation shaft is also connected to the transmission gear set. After the water pump starts, water is pumped out of the water tank and first enters the water turbine drive assembly, which drives the water turbine shaft of the water turbine drive assembly to rotate. After the water turbine shaft on the water turbine drive assembly rotates, it drives the filter screen rotating shaft to rotate through the transmission gear set. At the same time, the water flows through the outlet of the water turbine drive assembly into the inlet of the cleaning bracket, and then flows back to the water tank through the outlet of the cleaning bracket.

11. The range hood according to claim 10, characterized in that: It also includes an overflow valve, which is installed on the pipeline between the outlet of the cleaning bracket and the inlet of the water tank.

12. The range hood according to claim 11, characterized in that: It also includes a heating module, which is installed on the pipeline between the outlet of the water pump and the inlet of the water turbine drive assembly.

13. The range hood according to claim 12, characterized in that: A fume concentration sensor is installed on the lower side of the machine body, and a control board is installed inside the machine body; the water pump has a flow rate of full speed and half speed; the overflow valve has an opening angle of small speed and large speed; the fume concentration sensor, water pump and heating components are all connected to the control board and their working status is controlled by the control board. When the filter module needs to be cleaned, the control board controls the heating component to turn on, and at the same time, the control board turns on the water pump to run at half speed or full speed. The control board also turns on the overflow valve to set the overflow valve to low or high position. Furthermore, during the operation of the aforementioned range hoods: If the oil fume concentration detected by the oil fume concentration sensor is less than the first preset value, the control board will shut down both the water pump and the overflow valve. If the oil fume concentration is greater than or equal to the first preset value but less than the second preset value, the control panel will turn on the water pump and make it run at half speed. The control panel will also control the overflow valve to open and make the overflow valve open at the low setting. If the oil fume concentration is greater than or equal to the second preset value, the control panel will turn on the water pump to make the water pump run at full flow rate, and the control panel will control the overflow valve to open, and the opening position of the overflow valve will be set to the high position.

14. The range hood according to claim 13, characterized in that: The filter module assembly is equipped with a first airflow sensor and a second airflow sensor on its front and rear sides, respectively. The first and second airflow sensors are also connected to the control board. When the range hood is running, the degree of blockage of the filter module assembly is determined based on the airflow difference between the two airflow sensors. When the degree of blockage of the filter module assembly reaches a certain value, the cleaning of the filter module assembly is initiated. At this time, the control board controls the heating component to turn on, and at the same time, the control board turns on the water pump to run at half speed or full speed. The control board also opens the overflow valve to set the opening position to low or high.

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