A range hood

Abstract

The present invention discloses a range hood, comprising a shell, a lower panel arranged at the front side of the shell, and a cleaning device, wherein the cleaning device comprises a water box assembly, wherein the water box assembly is hidden in the shell and covered by the lower panel, wherein the water box assembly comprises a fixing frame fixedly arranged in the shell and a water box that can slide relative to the fixing frame, wherein the water box is used to store a cleaning medium; when the lower panel is closed relative to the shell, the water box is in a first position, which is a position for use during cleaning; when the lower panel is opened relative to the shell, the water box can slide forward to a second position relative to the fixing frame, which is a position for adding cleaning medium; the cleaning device also comprises a water suction pan assembly placed in the water box, wherein the water suction pan assembly sucks the cleaning medium in the water box and supplies it to an object to be cleaned.

Description

Technical Field

[0001] The invention relates to an oil fume purification device, in particular to a range hood. Background Art

[0002] Range hoods have become one of the indispensable kitchen appliances in modern families. Range hoods work based on the principle of fluid dynamics. A centrifugal fan installed inside the range hood absorbs and exhausts oil fumes, and uses a filter to filter out some grease particles. The centrifugal fan includes a volute, an impeller installed in the volute, and a motor that drives the impeller to rotate. When the impeller rotates, negative pressure suction is generated at the center of the fan, sucking the oil fumes under the range hood into the fan. After being accelerated by the fan, the fumes are collected by the volute and guided to be discharged outdoors.

[0003] With the continuous advancement of range hood self-cleaning technology, steam cleaning or water cleaning has been widely used in the field of range hood self-cleaning. The basic principle is that the steam generator generates steam or the water pump pumps water, and the steam or water is transported to the nozzle at the end of the nozzle. The steam or water is quickly ejected from the nozzle to flush the impeller and volute for cleaning.

[0004] There are usually three ways to install the water box used to supply water to the steam generator or water pump. One is to divide a water box into two areas, clean water and waste water. When cleaning, take down the oil cup and then hang the water box at the original oil cup position. When installing, you need to hold the water box with two hands and then hang it on the hook. The matching water intake structure uses rubber interference fit to achieve the connection between the internal water intake pipe of the water box and the built-in joint of the range hood. The water box taking experience is poor; the other is to be equipped with a water cup and a connecting hose separately. When in use, you need to add water to the water cup and connect the hose to the range hood. After cleaning, put away the water cup and the hose; another is to use two silicone gels. When the water cup is installed, the two silicone gels are used to achieve sealing.

[0005] Although the use of a heating module can quickly heat cold water, the complex piping system and the scale generated during the heating process will pose a risk of clogging the nozzle, which will increase the failure rate of the self-cleaning system and increase the cost; with the external water box method, the water box needs to be found when it is used again, which is at risk of being lost, and the disassembly experience is not good. The interference fit rubber of the joint will leak (no water can be sucked up) after long-term use (wear); with a separate water cup method, the interface of the range hood is in a leaking hole when not in use, which is extremely easy to be contaminated in the kitchen fume environment, and is prone to aging and reduced elasticity over time, resulting in a reduction in the interference fit, and there will be risks of leakage; with the interference fit of two silicones, the feel is poor during installation, and you need to hold both ends of the water box with both hands and press hard to achieve docking.

[0006] Therefore, further improvements are needed. Summary of the invention

[0007] The technical problem to be solved by the present invention is to provide a range hood with a built-in water box to facilitate connection, addition and supply of cleaning medium in view of the deficiencies in the above-mentioned prior art.

[0008] The technical solution adopted by the present invention to solve the above technical problems is: a range hood, comprising a housing, a lower panel arranged on the front side of the housing, and a cleaning device, wherein the cleaning device comprises a water box assembly, characterized in that:

[0009] The water box assembly is hidden in the shell and covered by the lower panel, and comprises a fixing frame fixedly arranged in the shell and a water box that can slide relative to the fixing frame, and the water box is used to store the cleaning medium;

[0010] When the lower panel is closed relative to the housing, the water box is in a first position, which is a position for use during cleaning;

[0011] When the lower panel is opened relative to the housing, the water box can slide forward relative to the fixing frame to a second position, where the second position is a position where cleaning medium can be added;

[0012] The cleaning device further comprises a water suction plate assembly placed in the water box, and the water suction plate assembly sucks the cleaning medium in the water box and supplies it to the object to be cleaned.

[0013] Preferably, to facilitate the linkage between the water box and the lower panel, the lower end of the lower panel is rotatably connected to the shell, and the upper end of the lower panel is detachably connected to the shell, and an elastic member is connected between the water box and the lower panel, so that the water box can slide with the lower panel when the lower panel is opened.

[0014] Preferably, in order to facilitate the linkage between the water box and the lower panel when the cleaning medium is insufficient, the lower end of the lower panel is rotatably connected to the shell, and the upper end of the lower panel is detachably connected to the shell, and an elastic member is connected between the water box assembly and the lower panel. When the amount of cleaning medium stored in the water box is not greater than a preset value, the pulling force of the elastic member enables the water box to overcome the friction with the fixing frame and open with the lower panel. When the amount of cleaning medium stored in the water box is greater than the preset value, the friction between the water box and the fixing frame is greater than the pulling force of the elastic member and the water box remains in the first position when the lower panel is opened.

[0015] Furthermore, to facilitate the resetting of the water box, the cleaning device also includes a moving mechanism for returning the water box from the second position to the first position, the moving mechanism including a fixed bracket fixed in the shell, a first connecting rod rotatably connected to the fixed bracket, a second connecting rod rotatably connected to the first connecting rod, and a push rod fixedly connected to the first connecting rod, the rotation axes of the first connecting rod and the second connecting rod are both parallel to the rotation axis of the lower panel, and the push rod extends in the direction of the lower panel and can act on the lower panel; the moving mechanism also includes a water box pull baffle plate arranged at the end of the second connecting rod, and the water box pull baffle plate is located on the front side of the water box facing the lower panel, thereby pushing the water box to slide backward.

[0016] In order to enable the movement mechanism to pop out when the lower panel is opened to avoid interference with the water box, one end of the first connecting rod is rotatably connected to the fixed bracket through the first connecting rod shaft, and a first torsion spring is arranged on the first connecting rod shaft, one end of the first torsion spring abuts against the first connecting rod and the other end abuts against the fixed bracket;

[0017] One end of the second connecting rod is partially rotatably connected to the two ends of the first connecting rod through the second connecting rod shaft, and a second torsion spring is arranged on the second connecting rod shaft, one end of the second torsion spring abuts against the second connecting rod and the other end abuts against the first connecting rod;

[0018] This maintains the tendency for the push rod and the water box to pull the baffle plate out in the direction of the lower panel.

[0019] In order to ensure smooth movement of the water box, the movement mechanism further includes a second limit block disposed on the first connecting rod for limiting the downward rotation position of the second connecting rod.

[0020] In order to better act on the push rod and prevent the push rod from slipping, a soft pad that contacts the push rod is arranged on the side of the lower panel facing the inside of the shell.

[0021] To facilitate the sliding connection between the water box and the fixed frame, the water box assembly also includes a water box bracket. The water box is in a shape with an open upper end. The fixed frame is located above the water box. The water box bracket is annular and is clamped on the upper end of the water box. The water box bracket is slidably connected to the fixed frame, so that the water box bracket and the water box can slide back and forth relative to the fixed frame.

[0022] In order to prevent the water box from being opened excessively and detached from the fixing frame, first limit blocks are provided at the front and rear ends of the fixing frame, and a support is provided on the top of the water box bracket. A guide rod is passed through the support, and the guide rod extends in the front and rear directions. Both ends of the guide rod are respectively connected to the first limit blocks, and the support is located between the two first limit blocks.

[0023] In order to prompt the user to add the amount of cleaning medium, a pressure sensor capable of detecting the liquid level in the water box is provided at the position where the water box bracket and the water box are connected, and an indicator light capable of indicating the liquid level is provided on the water box bracket.

[0024] To facilitate the removal of the water suction pan assembly when the water box is opened, the cleaning device also includes a water pump. The water suction pan assembly includes a water suction pan shell supported at the bottom of the water box and a hose. The upper end of the hose extends out of the water box and supplies cleaning medium to the water pump through a water inlet pipe. A water suction channel is formed in the water suction pan shell. The upper end of the water suction channel is fluidically connected to the lower end of the hose, and the lower end of the water suction channel is fluidically connected to the water box.

[0025] In order to facilitate the water absorption tray assembly to be adsorbed on other parts of the range hood when it is taken out, and to absorb impurities and act as a counterweight when in use, the water absorption tray assembly also includes a magnet, which is arranged on the water absorption tray housing.

[0026] In order to facilitate the water absorption tray housing to be placed at the bottom of the water box, the cross-sectional area of ​​the lower end of the water absorption tray housing is larger than that of the upper end, and the magnet is arranged at the lower end of the water absorption tray housing.

[0027] In order to prevent impurities in the cleaning medium from clogging the nozzle, the water suction disc assembly further includes a filter screen and a filter screen fixing gasket. The filter screen is arranged in the water suction channel, and the filter screen fixing gasket passes through the water suction channel to fix the filter screen.

[0028] In order to facilitate the water absorption channel to absorb the cleaning medium, the bottom of the water absorption tray shell is concave upward, the outer peripheral wall of the water absorption tray shell is supported on the bottom surface of the water box, and a hole is opened on the outer peripheral wall of the water absorption tray shell, and the cleaning medium in the water box is sucked into the water absorption channel through the hole.

[0029] In order to facilitate prompting the temperature of the added cleaning medium, a temperature sensor for detecting the temperature of the cleaning medium in the water box is arranged on the water absorption tray housing, and an indicator light capable of indicating the temperature of the cleaning medium in the water box is arranged on the water box assembly.

[0030] Preferably, the lower panel and the shell are connected by a connecting structure, which includes a support arm, a shaft and a parent-child buckle, the shaft is arranged in the shell, the bottom of the support arm is rotatably connected to the shell via the shaft, and the support arm is fixed to the lower part of the lower panel; the parent-child buckle makes the upper part of the lower panel detachably connected to the shell.

[0031] In order to provide appropriate damping when operating on the lower panel and improve the operating feel, the connecting structure also includes a third connecting rod and a fourth connecting rod. The third connecting rod is rotatably connected to the lower panel, one end of the fourth connecting rod is rotatably connected in the shell and the other end is rotatably connected to the position between the two ends of the third connecting rod, the rotation axes of the third connecting rod and the fourth connecting rod are parallel to the axis, and the third connecting rod and the fourth connecting rod are connected by a damping nut.

[0032] In order to prevent the lower panel from opening excessively, a bending portion is formed at the end of the third connecting rod away from the lower panel, and the bending portion is located behind the fourth connecting rod.

[0033] Compared with the prior art, the advantages of the present invention are: by providing a water suction tray assembly, the position of the water box is easily changed, so that the water box does not need to be repeatedly connected to the water inlet pipe when it is built-in, thereby eliminating the need for a heating module. The user directly heats the water during use, thereby reducing the failure rate and cost of the self-cleaning system; and the built-in water box eliminates the worry of losing it; a liquid level reminder is provided, so that when adding cleaning media, it can be intuitively judged whether the demand is met; a temperature reminder is provided, so that the temperature can be better controlled when adding cleaning media, thereby improving the cleaning efficiency; the water suction tray assembly has a magnetic shell that can be sucked on the bottom of the water box. When the water box is opened, the water suction tray assembly can be freely adsorbed on the shell of the range hood, which is more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 A schematic diagram of a range hood according to an embodiment of the present invention (the water box has water and the upper and lower panels are open);

[0035] Figure 2 for Figure 1 A schematic diagram of the partial enlargement of Ⅰ;

[0036] Figure 3 is a schematic diagram of a lower panel of a range hood according to an embodiment of the present invention and a connection structure between the lower panel and the housing;

[0037] Figure 4 for Figure 1 A schematic diagram of a water box assembly, a motion mechanism, an elastic member and a water inlet pipe of a cleaning device of a range hood;

[0038] Figure 5 It is a partial schematic diagram of the motion mechanism of the cleaning device of the range hood according to the embodiment of the present invention;

[0039] Figure 6 A schematic diagram of a water box assembly of a range hood cleaning device according to an embodiment of the present invention;

[0040] Figure 7 It is a schematic diagram of the exploded structure of the water box assembly of the range hood cleaning device according to an embodiment of the present invention;

[0041] Figure 8 for Figure 7 A partial II enlarged schematic diagram of

[0042] Fig. 9 for Figure 6 A cross-sectional view of a water box assembly;

[0043] Fig.10 for Fig. 9 A partial III enlarged schematic diagram of

[0044] Fig.11 A schematic diagram of a water suction plate of a water box assembly of a cleaning device according to an embodiment of the present invention;

[0045] Fig.12 A schematic diagram of a range hood according to an embodiment of the present invention (the lower and upper panels are open when the water box is empty);

[0046] Fig.13 is a schematic diagram of a range hood according to an embodiment of the present invention (with the lower panel closed);

[0047] Fig.14 It is a partial cross-sectional view of a range hood according to an embodiment of the present invention (the lower panel is closed). DETAILED DESCRIPTION

[0048] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions.

[0049] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Since the embodiments disclosed in the present invention can be set in different directions, these terms indicating directions are only for illustration and should not be regarded as limitations. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features.

[0050] See also Figure 1A range hood is a side suction range hood, comprising a housing 1 and a fan system (not shown) arranged above the housing 1. The range hood also includes a cleaning device, which can be mainly used to clean the fan system, and of course can also clean the inner cavity or other components of the range hood.

[0051] The cleaning device includes a water box assembly 21 and a motion mechanism 22 for moving the water box assembly 21. In this embodiment, the water box assembly 21 is arranged at the lower part of the housing 1. For the convenience of display, the drawings in the specification relate to the structural drawings of the whole machine, and do not show the panel or smoke shield of the housing 1 above the water box assembly 21. The front side of the housing 1 is provided with a lower panel 3, and the lower panel 3 is also located at the front side of the water box assembly 21.

[0052] Since the water box assembly 21 is arranged at the lower part of the housing 1 and hidden behind the lower panel 3, the lower panel 3 needs to be opened first when adding water or cleaning the water box assembly 21. To this end, the lower part of the lower panel 3 needs to be rotatably connected to the housing 1, and the upper part needs to be detachably connected to the housing 1, such as by snapping, magnetic attraction, etc., so that the lower panel 3 can be opened by rotating the upper end forward. Figure 1 to Figure 3 The connection structure between the lower panel 3 and the shell 1 includes a lower panel bracket 31, a support arm 32, a third connecting rod 33 and a fourth connecting rod 34. The lower panel bracket 31 is arranged on the surface of the lower panel 3 facing the inside of the shell 1. The lower panel bracket 31 may have two pieces arranged at intervals on the left and right, and may be fixed to the lower panel 3 by gluing. The lower panel bracket 31 is connected to the support arm 32 and the third connecting rod 33 respectively, and the connection position of the support arm 32 is lower than the connection position of the third connecting rod 33. The support arm 32 and the lower panel bracket 31 are fixedly connected. A shaft 35 is provided at the bottom of the shell 1. The bottom of the support arm 32 is sleeved on the shaft 35 and can rotate relative to the shaft 35, so that the lower panel 3 can rotate around the shaft 35 at the bottom of the support arm 32. Alternatively, it can also be set that the shaft 35 is rotatably connected to the shell 1, and the support arm 32 is fixed to the shaft 35, as long as the support arm 32 can rotate relative to the shell 1, and the rotation axis of the support arm 32 extends in the left and right directions.

[0053] The third connecting rod 33 is rotatably connected to the lower panel bracket 31, one end of the fourth connecting rod 34 is rotatably connected to the housing 1, and the other end is rotatably connected to the position between the two ends of the third connecting rod 33, and the rotation axes of the third connecting rod 33 and the fourth connecting rod 34 are both extended in the left-right direction. The rotation axes of the lower panel 3, the third connecting rod 33 and the fourth connecting rod 34 are parallel. The third connecting rod 33 and the fourth connecting rod 34 can be connected by a damping nut 36. The end of the third connecting rod 33 away from the lower panel bracket 31 is formed with a bent portion 331, and the bent portion 331 is located behind the fourth connecting rod 34.

[0054] The connection structure also includes a female buckle 37 and a sub-buckle 38 for connecting the upper part of the lower panel 3 to the housing 1, wherein the female buckle 37 is fixed in the housing 1, and the sub-buckle 38 is fixed on the side of the lower panel 3 facing the inside of the housing 1 and close to the upper end of the lower panel 3. Through the cooperation of the female buckle 37 and the sub-buckle 38, the upper end of the lower panel 3 is snap-fitted with the housing 1. The positions of the female buckle 37 and the sub-buckle 38 are interchangeable.

[0055] The third connecting rod 33 and the fourth connecting rod 34 play a damping and limiting role in the opening process of the lower panel 3. When the lower panel 3 rotates forward and opens to a certain angle, the bent portion 331 of the third connecting rod 33 will contact the fourth connecting rod 34 to prevent the lower panel 3 from continuing to open to a large angle. This angle satisfies the water box assembly 21 and the oil cup (not shown, located below the water box assembly 21, at the bottom of the housing 1) for taking and placing, and will not interfere with the high pot on the stove. When the lower panel 3 needs to be closed, push the lower panel 3 to rotate inward. When the closed state is reached, the sub-buckle 38 on the lower panel 3 will be engaged with the female buckle 37 on the housing 1 to achieve a tight closure.

[0056] See also Figures 4 to 11 The water box assembly 21 includes a water box 211, a fixing frame 212, a first limit block 213 and a water box bracket 214. The water box 211 is used to store a cleaning medium, such as water or a cleaning agent, etc. In this embodiment, water is used as an example for explanation. Other structures of the cleaning device, such as a water pump, a nozzle, etc., the nozzle sprays the cleaning medium onto the object to be cleaned for cleaning, which can be the same as the prior art and will not be repeated here. When using the cleaning device for self-cleaning, the user can directly add hot water to the water box assembly 21, which eliminates the need for a heating module, can reduce the failure rate and cost, and avoid the risk of scale clogging the nozzle and the heating module.

[0057] The water box 211 is in an open shape at the top, and the fixing frame 212 is located above the water box 211 and is installed on the inner cavity of the range hood, such as the housing 1 of this embodiment. The first limit blocks 213 are provided at the front and rear ends of the fixing frame 212. The first limit blocks 213 can play a supporting and limiting role to prevent the water box 211 from being pushed forward too much and causing the water box 211 to fall off. The method of pushing out and resetting the water box 211 is described below.

[0058] The water box bracket 214 is arranged at the upper end of the water box 211. The water box bracket 214 is annular to prevent the open part of the water box 211 from being blocked. A card slot 2111 is formed on the outer peripheral wall of the water box 211 near the upper end. The card slot 2111 is formed by the outer peripheral walls of the left and right sides and the rear side of the water box 211 being recessed inward. The water box bracket 214 is engaged with the water box 211 through the card slot 2111, so that the water box bracket 214 and the water box 211 are fixed.

[0059] A support 215 is provided on the top of the water box bracket 214, and a guide rod 216 is passed through the support 215. The guide rod 216 extends in the front-to-back direction, and both ends of the guide rod 216 are respectively connected to the first limit blocks 213, and the support 215 is located between the two first limit blocks 213. Slide grooves 2121 are formed on the left and right sides of the inner peripheral wall of the fixed frame 212, and the outer edge of the water box bracket 214 is slidably connected to the slide grooves 2121, so that the water box bracket 214 and the water box 211 can slide forward and backward relative to the fixed frame 212 within a preset range.

[0060] In the present invention, the water box 211 is usually not taken out when in use, and the user can directly add water to the water box 211. Because the water needs to be heated in the water box 211, if the water box 211 needs to be manually pushed in after adding hot water, there will be a risk of scalding. Therefore, the water box assembly 21 is preferably linked with the lower panel 3. In this embodiment, an elastic member 23 is provided between the lower panel 3 and the water box assembly 21. Preferably, the elastic member 23 is a tension spring. A fixing ring 216 is provided on the water box bracket 214 of the water box assembly 21. One end of the elastic member 23 is fixed to the fixing ring 216, and the other end is fixed to the side of the lower panel 3 facing the housing 1.

[0061] When the lower panel 3 is opened (it can be to observe the oil content of the oil cup, or to pour out the waste oil in the oil cup, or to check whether there is water in the water box), if the amount of water in the water box 211 is large (not less than the amount required to complete one self-cleaning, and the amount required to complete one self-cleaning can be set as a preset value), then due to the large friction force generated by gravity, the friction force between the water box bracket 214 and the slide groove 2121 of the fixed frame 212 will be greater than the pulling force of the elastic member 23, and the water box bracket 214 will not be pulled out of the fixed frame 212 by the elastic member 23. In other words, when there is enough water in the water box 211 and the lower panel 3 is open, see Figure 1 and Figure 2 , the water box 211 will not be pulled out and is in the first position, which is the position for use during cleaning; if the water in the water box 211 is less (not enough to complete one self-cleaning), the friction between the water box bracket 214 and the slide groove 2121 of the fixing frame 212 will be less than the pulling force of the elastic member 23, and the water box 211 will be pulled out and in the second position, at which time the cleaning medium can be added, see Fig.12 The elastic force of the elastic member 23 can be adjusted in advance according to the above requirements.

[0062] When the water box 211 is pulled out and water is added, the water box 211 and the lower panel 3 can be linked together through the motion mechanism 22. Figure 2 , Figure 4 and Figure 5The motion mechanism 22 includes a fixed bracket 221 fixed in the housing 1, a first connecting rod 222 rotatably connected to the fixed bracket 221, a second connecting rod 223 rotatably connected to the first connecting rod 222, a second stopper 224 provided on the first connecting rod 222, and a push rod 225 fixedly connected to the first connecting rod 222. The rotation axes of the first connecting rod 222 and the second connecting rod 223 both extend in the left-right direction and are parallel to the rotation axis of the lower panel 3. One end of the first connecting rod 222 is rotatably connected to the fixed bracket 221 through a first connecting rod shaft 226, and a first torsion spring 227 is provided on the first connecting rod shaft 226, one end of the first torsion spring 227 abuts against the first connecting rod 222, and the other end abuts against the fixed bracket 221. One end of the second connecting rod 223 is partially rotatably connected to the first connecting rod 222 via a second connecting rod shaft 228. A second torsion spring 229 is disposed on the second connecting rod shaft 228. One end of the second torsion spring 229 abuts against the second connecting rod 223, and the other end abuts against the first connecting rod 222. The push rod 225 extends from the end of the first connecting rod 222 toward the lower panel 3.

[0063] The above components of the motion mechanism 22 have two groups, which are respectively arranged on the left and right sides of the water box 211 . A water box pull baffle 230 is connected between the other ends of the two second connecting rods 223 and is located at the front side of the water box 211 .

[0064] A soft pad 39, such as a silicone pad, is provided on the side of the lower panel 3 facing the inside of the housing 1. As the lower panel 3 rotates toward the housing 1 (such as Fig.13 The cushion 39 on the lower panel 3 will first contact the left and right push rods 225, and the push rods 225 will drive the first connecting rod 222 to rotate clockwise, while driving the second connecting rod 223 to move inside the shell 1, and drive the water box 221 to move inside the shell 1 through the water box pull baffle 230. In order to prevent the water box baffle 230 and the second connecting rod 223 from contacting the water box 221 too downward due to their own weight, thereby preventing the uneven force from affecting the inward movement of the water box 221, a second limit block 224 is provided to limit the lower limit of the end of the second connecting rod 223 connected to the water box baffle 230 during the rotation process, thereby ensuring that the contact position of the water box baffle 230 and the water box 211 is moderate, and the second torsion spring 229 enables the second connecting rod 223 to drive the water box baffle 230 to have an upward trend, thereby ensuring that the contact position with the water box 211 is upward, so as to facilitate pushing the water box 211 to move inward until it is closed, see Fig.13 and Fig.14 , the water box 211 is in the first position.

[0065] When the lower panel 3 is opened, the first torsion spring 227 between the first connecting rod 222 and the fixing bracket 221 will drive the entire mechanism to pop out, so that the push rod 225 and the water box pull baffle 230 are both forward, and the movement of the water box pull baffle 230 can avoid blocking the water box 211 from being pulled out. Figure 1 When the lower panel 3 is closed, the lower panel 3 and the sub-clasp on the housing 1 will be locked together to ensure safety.

[0066] The above linkage technical solution does not require electric tools, has high reliability, low cost, and is safe. Alternatively, the lower panel 3 can also be driven to rotate by an electric drive mechanism.

[0067] See also Figure 7 to Figure 11 A pressure sensor 217 is provided at the front end of the water box bracket 214, and the pressure sensor 217 is located at the clamping position of the water box bracket 214 and the water box 211. The water level in the water box 211 is judged by the pressure sensing value of the pressure sensor 217. The more water is stored in the water box 211 and the inside, the greater the force applied at the clamping position of the water box 211 and the water box bracket 214, and the force can be sensed by the pressure sensor 217. When the water box 211 needs to be taken out from the inside of the housing 1, the water box bracket 214 can be pressed by hand, and then the water box 211 can be pulled out from the water box bracket 214 by force.

[0068] The cleaning device also includes a water suction tray assembly 24 disposed in the water box 21, including a water suction tray housing 241, a filter screen 242, a filter screen fixing gasket 243, a magnet 244 and a temperature sensor 245. The upper end of the water suction tray housing 241 is connected to a hose 246, the upper end of the hose 246 extends out of the water box 211 and is connected to the water inlet pipe 4 (only part of the water inlet pipe 4 is shown in the drawings of the specification) for supplying water to the water pump and using the negative pressure of the water pump to absorb water. By setting the hose 246, the water box 211 is pushed out and returned to its original position without affecting the water suction tray assembly 24.

[0069] The cross-sectional area of ​​the lower end of the water suction tray housing 241 is larger than that of the upper end. A water suction channel 2411 is formed in the water suction tray housing 241, which penetrates the upper and lower end surfaces of the water suction tray housing 241. The upper end of the water suction channel 2411 is connected to the lower end of the above-mentioned hose 246, and a filter screen 242 is arranged at the connection point. The filter screen fixing gasket 243 passes through the water suction channel 2411 and is threadedly connected to the water suction tray housing 241. The filter 242 is fixed to the upper end of the filter fixing gasket 243, and the lower end of the filter fixing gasket 243 passes through the water absorption channel 2411. The magnet 244 is sleeved on the outer periphery of the part of the filter fixing gasket 243 extending out of the water absorption channel 2411, which has three functions: one is to absorb impurities such as iron filings in the water quality, the other is that when the water box is removed, the water absorption plate assembly 24 can be freely absorbed on the housing 1 of the range hood, and the other is that after the water box 211 is installed, the magnet 244 will play a certain counterweight role and can be absorbed at the bottom of the water box 211, so as to ensure that the water at the bottom of the water box 211 can be absorbed. The outer peripheral wall of the water absorption plate housing 241 is lower than the lower end of the filter fixing filter 243, that is, the bottom of the water absorption plate housing 241 is in an upward concave shape. The outer peripheral wall of the water absorption tray housing 241 is supported on the bottom surface of the water box 211. The water in the water box 211 enters from the lower end of the filter screen fixing gasket 243, passes through the water absorption channel 2141 and the filter screen 242, and then enters the hose 246. A hole 2412 is provided on the outer peripheral wall of the water absorption tray housing 241. Preferably, there are a plurality of holes 2412, which are evenly arranged in the circumferential direction. The position of the hole 2412 is preferably not higher than the lower end of the water absorption channel 2411. Thus, the water in the water box 211 can be sucked in through the hole 2412, and large impurities can be filtered at the same time. The filter screen 242 can filter small impurities, and when the filter screen 242 is blocked, the filter screen 242 can be taken out for cleaning by simply unscrewing the filter screen fixing gasket 243.

[0070] When you want to take out the water box 211, you can operate it with one hand and absorb the water absorption tray assembly 24 on any metal surface of the range hood. When you need to use the water in the water box 211, the water absorption tray assembly 24 can be placed with one hand. Since the water absorption tray has a large lower end and a small upper end, it will be directly placed on the bottom of the water box 211, and the water absorption tray assembly 24 has a magnet 244. The water absorption tray housing 241 and the bottom of the water box 211 (the water box 211 is made of metal materials such as iron that can be absorbed by the magnet 244) can be in close contact, thereby ensuring the reliability of water absorption.

[0071] Since it is difficult to know the water temperature when pouring hot water into the water box 211, and it is also difficult to see the water level clearly when looking down, three indicator lights 218 are provided on the top of the water box bracket 214, indicating different colors, such as blue, green and red. Therefore, three indicator lights 218 are provided on the left side of the water box bracket, and the flashing of the indicator lights 218 represents the temperature in the water box at that time. The impeller of the fan system needs to be flushed with water of a certain temperature to be effective. If the temperature is too low, the grease cannot melt after acting on the blades. If the water temperature is too high, it will affect the valve plate of the pump and damage its service life. Therefore, the temperature of adding water is also very important. The water adding temperature of the water box is defined according to the temperature required for the grease on the blades to melt and the maximum temperature that the water pump valve plate can withstand. For example, the lowest temperature at which the blades can melt and be easily cleaned is T1, and the highest temperature that the pump valve can withstand is T2. When the temperature T detected by the temperature sensor 245 is: T1<T<T2, the temperature displays a suitable temperature, and the indicator light 218 flashes green, which means the temperature is appropriate; T≥T2, the indicator light 218 flashes red, which means the temperature is too high; T1≥T, the indicator light 218 flashes blue, which means the temperature is too low. The value of T1 can be measured based on the test data.

[0072] The indicator light 218 is always on to indicate the water level. Therefore, the indicator light 218 can be divided into 9 situations:

[0073] If the red light flashes and the blue light is on, it means that the water temperature is too high and the water level in the water box 211 is at a low level. At this time, the user needs to add some cold water in the water box 211 to make the blue light flash; if the red light flashes and the green light is on, it means that the water temperature is too high and the water level in the water box 211 is at a medium level. At this time, the user needs to add some cold water in the water box 211 to make the blue light flash.

[0074] If the green light flashes and the red light is on, it means that the water temperature is appropriate and the water level in the water box 211 is high. At this time, the user needs to stop adding water, return the water box 211 to its original position, and perform self-cleaning after closing the lower panel 3. If the green light flashes and the blue light is on, it means that the water temperature is appropriate and the water level in the water box 211 is low, and water needs to be added.

[0075] If the blue light flashes and the green light is on, it means that the water temperature is low and the water level in the water box 211 is at a medium level. At this time, the user needs to add some hot water and wait for the green light to flash; if the blue light flashes and the red light is on, it means that the water temperature is low and the water level in the water box 211 is at a high level. At this time, the user needs to stop adding water, the water pump will start to spray some clean water to flush the impeller, and then the user needs to add some hot water and wait for the green light to flash.

[0076] In the above embodiment, the range hood is a side suction type, and the cleaning device of the present invention and the lower panel 3 can also be used in other forms, such as a top suction range hood, in which case the housing 1 can be a fan frame or other components of the range hood. It is only necessary to form an inner cavity with the housing 1 to accommodate the cleaning device.

Claims

1. A range hood, comprising a housing (1), a lower panel (3) arranged at the front side of the housing (1), and a cleaning device, wherein the cleaning device comprises a water box assembly (21), characterized in that: The water box assembly (21) is hidden in the housing (1) and covered by the lower panel (3), the water box assembly (21) comprises a fixing frame (212) fixedly arranged in the housing (1) and a water box (211) capable of sliding relative to the fixing frame (212), and the water box (211) is used to store a cleaning medium; When the lower panel (3) is closed relative to the housing (1), the water box (211) is in a first position, which is a position for use during cleaning; When the lower panel (3) is opened relative to the housing (1), the water box (211) can slide forward relative to the fixing frame (212) to a second position, wherein the second position is a position where a cleaning medium can be added; The cleaning device further comprises a water suction disc assembly (24) placed in the water box (211), wherein the water suction disc assembly (24) sucks the cleaning medium in the water box (211) and supplies it to the object to be cleaned; The lower end of the lower panel (3) is rotatably connected to the shell (1), and the upper end of the lower panel (3) is detachably connected to the shell (1). An elastic member (23) is connected between the water box (211) and the lower panel (3), so that the water box (211) can slide along with the lower panel (3) when the lower panel (3) is opened. The lower end of the lower panel (3) is rotatably connected to the shell (1), and the upper end of the lower panel (3) is detachably connected to the shell (1). An elastic member (23) is connected between the water box assembly (21) and the lower panel (3). When the amount of cleaning medium stored in the water box (211) is not greater than a preset value, the pulling force of the elastic member (23) enables the water box (211) to overcome the friction force with the fixing frame (212) and open along with the lower panel (3). When the amount of cleaning medium stored in the water box (211) is greater than a preset value, the friction force between the water box (211) and the fixing frame (212) is greater than the pulling force of the elastic member (23), and the water box (211) is kept in the first position when the lower panel (3) is opened. The cleaning device further comprises a moving mechanism (22) for causing the water box (211) to return from the second position to the first position, the moving mechanism (22) comprising a fixed bracket (221) fixed in the housing (1), a first connecting rod (222) rotatably connected to the fixed bracket (221), a second connecting rod (223) rotatably connected to the first connecting rod (222), and a push rod (225) fixedly connected to the first connecting rod (222), the rotation axes of the first connecting rod (222) and the second connecting rod (223) are both parallel to the rotation axis of the lower panel (3), the push rod (225) extends in the direction of the lower panel (3) and can act on the lower panel (3); the moving mechanism (22) further comprises a water box pull baffle (230) arranged at the end of the second connecting rod (223), the water box pull baffle (230) being located on the front side of the water box (211) facing the lower panel (3), thereby being able to push the water box (211) to slide backwards.

2. The range hood according to claim 1, characterized in that: One end of the first connecting rod (222) is rotatably connected to the fixed bracket (221) via a first connecting rod shaft (226); a first torsion spring (227) is provided on the first connecting rod shaft (226); one end of the first torsion spring (227) abuts against the first connecting rod (222) and the other end abuts against the fixed bracket (221); One end of the second connecting rod (223) is partially rotatably connected to the two ends of the first connecting rod (222) via a second connecting rod shaft (228); a second torsion spring (229) is provided on the second connecting rod shaft (228); one end of the second torsion spring (229) abuts against the second connecting rod (223) and the other end abuts against the first connecting rod (222); This maintains the tendency for the push rod (225) and the water box pull baffle (230) to be pushed out in the direction of the lower panel (3).

3. The range hood according to claim 1, characterized in that: The motion mechanism (22) further comprises a second limit block (224) arranged on the first connecting rod (222) and used for limiting the downward rotation position of the second connecting rod (223).

4. The range hood according to claim 1, characterized in that: A soft pad (39) that contacts the push rod (225) is provided on one side of the lower panel (3) facing the inside of the housing (1).

5. The range hood according to claim 1, characterized in that: The water box assembly (21) further comprises a water box bracket (214); the water box (211) is in a shape with an open upper end; the fixing frame (212) is located above the water box (211); the water box bracket (214) is in a ring shape and is clamped on the upper end of the water box (211); the water box bracket (214) is slidably connected to the fixing frame (212), so that the water box bracket (214) and the water box (211) can slide forward and backward relative to the fixing frame (212).

6. The range hood according to claim 5, characterized in that: First limit blocks (213) are arranged at the front and rear ends of the fixing frame (212), a support (215) is arranged at the top of the water box bracket (214), a guide rod (216) is passed through the support (215), the guide rod (216) extends in the front and rear directions, the two ends of the guide rod (216) are respectively connected to the first limit blocks (213), and the support (215) is located between the two first limit blocks (213).

7. The range hood according to claim 5, characterized in that: A pressure sensor (217) capable of detecting the liquid level in the water box (211) is provided at the position where the water box bracket (214) and the water box (211) are clamped together, and an indicator light (218) capable of indicating the liquid level is provided on the water box bracket (214).

8. The range hood according to claim 1, characterized in that: The cleaning device further comprises a water pump. The water suction pan assembly (24) comprises a water suction pan housing (241) supported at the bottom of the water box (211) and a hose (246). The upper end of the hose (246) extends out of the water box (211) and supplies cleaning medium to the water pump through the water inlet pipe (4). A water suction channel (2411) is formed in the water suction pan housing (241). The upper end of the water suction channel (2411) is fluidically connected to the lower end of the hose (246), and the lower end of the water suction channel (2411) is fluidically connected to the water box (211).

9. The range hood according to claim 8, characterized in that: The water absorption tray assembly (24) further comprises a magnet (244), wherein the magnet (244) is arranged on the water absorption tray housing (241).

10. The range hood according to claim 9, characterized in that: The cross-sectional area of ​​the lower end of the water absorption tray housing (241) is larger than that of the upper end, and the magnet (244) is arranged at the lower end of the water absorption tray housing (241).

11. The range hood according to claim 8, characterized in that: The water absorption tray assembly (24) further comprises a filter screen (242) and a filter screen fixing gasket (243); the filter screen (242) is arranged in the water absorption channel (2411); and the filter screen fixing gasket (243) passes through the water absorption channel (2411) to fix the filter screen (242).

12. The range hood according to claim 8, characterized in that: The bottom of the water absorption tray housing (241) is in an upwardly concave shape, and the outer peripheral wall of the water absorption tray housing (241) is supported on the bottom surface of the water box (211). A hole (2412) is opened on the outer peripheral wall of the water absorption tray housing (241), and the cleaning medium in the water box (211) is sucked into the water absorption channel (2411) through the hole (2412).

13. The range hood according to claim 8, characterized in that: The water absorption tray housing (241) is provided with a temperature sensor (245) for detecting the temperature of the cleaning medium in the water box (211), and the water box assembly (21) is provided with an indicator light (218) capable of indicating the temperature of the cleaning medium in the water box (211).

14. The range hood according to claim 1, characterized in that: The lower panel (3) and the shell (1) are connected via a connecting structure, wherein the connecting structure comprises a support arm (32), a shaft (35) and a sub-clasp, wherein the shaft (35) is arranged in the shell (1), the bottom of the support arm (32) is rotatably connected to the shell (1) via the shaft (35), and the support arm (32) is fixed to the lower part of the lower panel (3); the sub-clasp enables the upper part of the lower panel (3) to be detachably connected to the shell (1).

15. The range hood according to claim 14, characterized in that: The connection structure also includes a third connecting rod (33) and a fourth connecting rod (34), wherein the third connecting rod (33) is rotatably connected to the lower panel (3), one end of the fourth connecting rod (34) is rotatably connected in the shell (1) and the other end is rotatably connected to a position between the two ends of the third connecting rod (33), the rotation axes of the third connecting rod (33) and the fourth connecting rod (34) are parallel to the shaft (35), and the third connecting rod (33) and the fourth connecting rod (34) are connected via a damping nut (36).

16. The range hood according to claim 15, characterized in that: A bending portion (331) is formed at the end of the third connecting rod (33) away from the lower panel (3), and the bending portion (331) is located behind the fourth connecting rod (34).

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