Integrated cooking appliance and control method thereof

Abstract

The present invention discloses an integrated cooking appliance and a control method thereof, wherein the integrated cooking appliance comprises a range hood, a stove body and a cleaning device, wherein the stove body comprises a cabinet, a stove arranged on the top of the cabinet and a steamer arranged in the cabinet, wherein the steamer comprises a box body and a steam generator arranged outside the box body, and wherein the cleaning device comprises a water inlet pipeline connected to an external tap water pipe, wherein the water inlet pipeline passes under the stove body to realize heat exchange and is connected to the steam generator, wherein the steam generator is respectively in fluid communication with the interior of the box body and the interior of the range hood. Compared with the prior art, the present invention has the advantages that water can be supplied to the steamer by arranging water inlet and outlet pipelines, thereby eliminating the water tank of the steamer, and no manual water addition is required, thereby reducing the labor of the user, and at the same time, the water is heated by utilizing the waste heat of the stove body, thereby reducing the power consumption of the steam generator and extending its service life.

Description

Technical Field

[0001] The invention relates to kitchen equipment, in particular to an integrated cooking appliance and a control method of the integrated cooking appliance. 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] During the use of the range hood, a large amount of oil will accumulate on the fan, which can easily cause blockage, increase load, etc., affecting the use of the range hood. For this reason, some range hoods with self-cleaning functions are now available. 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] The existing steam cleaning or water cleaning methods usually adopt the form of an external water box or water cup. For example, a range hood disclosed in the Chinese patent application number 201620368078.3 includes a fume filter box, an air intake box, a fan system installed inside, the fan system includes an air duct housing, a fan and an impeller installed in the air duct housing, a spray device toward the impeller is installed on the air duct housing, including a shower head, a water inlet interface of the shower head is connected to an external water tank and a water pump, and the water pump is connected to the water inlet interface through a pipeline to provide cleaning liquid or water for the shower head.

[0005] This self-cleaning range hood uses a water tank to store cleaning water, which greatly limits the time, range and cleanliness of the range hood's self-cleaning, making it impossible to effectively solve the problem. Moreover, once the user loses the water box or cup, the self-cleaning function cannot be used.

[0006] In addition, there is also a way of externally connecting a water pipe, such as a range hood disclosed in a Chinese patent with application number 202022554882.X, which includes a shell, a water inlet switch valve, a water outlet switch valve and a conveying power component. The shell surrounds a smoke collecting chamber, and the smoke collecting chamber has a water storage area for storing the liquid required for washing. The shell is provided with a water inlet interface and a water outlet interface respectively connected to the water storage area, the water inlet switch valve is used to control the opening and closing of the water inlet interface, and the water outlet switch valve is used to control the opening and closing of the water outlet interface, and a spray arm is provided in the smoke collecting chamber; when it is necessary to discharge the oil, the water outlet switch valve is opened, the water outlet interface is connected, and the oil in the water storage area is discharged from the water outlet interface.

[0007] This kind of external water pipe solution will cause the oil to be too viscous when draining. If it is simply drained by gravity, the oil pipe will be blocked over time, causing drainage failure. Summary of the invention

[0008] The first technical problem to be solved by the present invention is to provide an integrated cooking utensil in view of the deficiencies of the above-mentioned prior art, which can save a whole water tank, simplify the structure, and eliminate the need for manual water addition, thereby reducing the workload.

[0009] The second technical problem to be solved by the present invention is to provide a control method using the above-mentioned integrated cooking appliance.

[0010] The technical solution adopted by the present invention to solve the above-mentioned first technical problem is: an integrated cooking appliance, including a range hood, a stove body and a cleaning device, the stove body including a cabinet body, a stove arranged on the top of the cabinet body and a steamer arranged in the cabinet body, the steamer including a box body and a steam generator arranged outside the box body, characterized in that: the cleaning device includes a water inlet pipeline connected to an external tap water pipe, the water inlet pipeline passes through the stove to realize heat exchange and is connected to the steam generator, and the steam generator is respectively connected to the fluid inside the box body and the inside of the range hood.

[0011] In order to facilitate cooling of the electrical box of the steamer and simplify the heat dissipation system, the steamer also includes an electrical box arranged outside the box, and the water inlet pipeline includes a water inlet pipe, one end of which extends out of the cabinet and is used to be connected to a tap water pipe, and the water inlet pipe also passes under the electrical box to achieve heat exchange.

[0012] Preferably, in order to fully dissipate the heat of the electrical box, the water inlet pipe and the position corresponding to the electrical box are in a parallel reflux shape.

[0013] In order to absorb the waste heat of the stove as much as possible, the water inlet pipeline also includes a first conduit and a second conduit, the first conduit is used to communicate with the water inlet pipe, and the second conduit is used to communicate with the steam generator. The stove includes a stove panel, a stove head and a switch arranged on the stove panel, and an energy gathering ring is arranged on the periphery of the stove head. The first conduit and the second conduit as a whole exchange heat with the above-mentioned stove head, switch and energy gathering ring.

[0014] Preferably, the cleaning device also includes a first valve and a second valve, the water inlet pipe is connected to the input end of the first valve, one end of the first conduit is connected to the output end of the first valve, the first conduit passes through the bottom of the stove and the switch in sequence and extends to the energy gathering circle, one end of the second conduit is connected to the energy gathering circle, and the other end of the second conduit is connected to the input end of the second valve, the energy gathering circle is hollow in shape, and the first conduit and the second conduit are respectively connected to the internal fluid of the energy gathering circle; the output end of the second valve is connected to the steam generator of the steamer through a third conduit.

[0015] In order to facilitate the separate supply of cleaning water for the range hood and steam for the steamer, the cleaning device also includes a third valve and a water outlet pipe. The outlet of the steam generator is connected to the third valve. One output of the third valve is connected to the interior of the range hood through the water outlet pipe, and the other output of the third valve is directly connected to the interior of the steamer.

[0016] In order to facilitate the discharge of oil stains in the fan system and the sewage mixed with oil and water after cleaning, the range hood includes an air inlet assembly arranged above the cabinet and a fan system arranged in the cabinet, and an air inlet is opened on the air inlet assembly. The cleaning device also includes a sewage discharge assembly, and the sewage discharge assembly includes an oil collecting box and a sewage pipe arranged below the fan system for collecting sewage flowing down from the fan system. The sewage pipe is used to discharge the sewage in the oil collecting box to the sewer.

[0017] To facilitate the collection of sewage, the sewage discharge assembly also includes an oil collecting tray, which is arranged on the top surface of the oil collecting tank. The oil collecting tray is in the shape of a truncated cone that gradually sinks from the periphery to the middle, and an oil leakage hole is opened at the lower end of the oil collecting tray, so that the outside of the oil collecting tray is connected to the internal fluid of the oil collecting tank through the oil leakage hole.

[0018] In order to facilitate the discharge of sewage in the oil collecting box to the sewage pipe through fluid pressure, the range hood also includes an air outlet cover arranged at the air outlet of the fan system, and the sewage discharge component also includes a ventilation pipe, which is connected between the air outlet cover and the oil collecting box of the sewage discharge component so that the inside of the air outlet cover and the oil collecting box are fluidly connected. The sewage discharge component also includes a sealing member, which is rotatably arranged in the oil collecting box through a laterally extending rotating shaft. The sealing member can flip over and seal the oil leakage hole when subjected to pressure from the air outlet cover, and the sealing member maintains a tendency to open the oil leakage hole.

[0019] Preferably, the blocking member includes an integrally formed first flap and a second flap, the top of the first flap is open, and the end of the ventilation pipe extends into the oil collecting tank and is located above the first flap.

[0020] To facilitate heating of sewage in the oil collecting tank and reduce viscosity, the cleaning device also includes a fourth conduit and a shell, one end of the fourth conduit is connected to the outlet of the steam generator, and the other end is connected to the shell and communicated with the gap fluid between the shell and the oil collecting tank.

[0021] In order to facilitate the control of the operation of the sewage discharge component, a fourth valve for controlling the on-off of the fluid passage between the air outlet cover and the oil collecting tank is arranged on the ventilation pipe. The sewage discharge component also includes a liquid level sensor and a viscosity sensor arranged in the oil collecting tank.

[0022] The technical solution adopted by the present invention to solve the second technical problem is: a control method of the integrated cooking appliance as described above, wherein the air outlet cover of the integrated cooking appliance includes a check valve plate, characterized in that the control method includes the following steps:

[0023] 1) After the start, the liquid level H in the oil collecting tank is detected by the liquid level sensor and recorded; the integrated cooking appliance is preset with a first height threshold h1, a second height threshold h2 and a third height threshold h3, and h3>h2>h1 is satisfied, h1 is the low oil discharge height of the oil collecting tank, h3 is the high oil discharge height of the oil collecting tank, and h2 is between h1 and h3; the number of oil discharges from high position to low position is set to i, initially i=0, and each time the oil is discharged from high position to low position, it will be accumulated once, i=i+1;

[0024] 2) Compare the detected current liquid level H with h1. If H>h1, start the viscosity sensor to detect the viscosity of the sewage in the oil collecting tank (371), and enter step 3); if H≤h1, do not start the viscosity detection;

[0025] 3) Determine whether h2>H>h1 is established. If so, it means that the current liquid level is at the lower position between h1 and h2, and go to step 4). If not, go to step 10);

[0026] 4) Determine whether the range hood needs to be cleaned at this time. If it does, proceed to step 5); if it does not need to be cleaned, there is no need to start the sewage discharge component.

[0027] 5) Determine the cleaning mode required by the range hood. If it is determined to be the first cleaning mode, after the cleaning is completed, the sewage discharge component is not started; if it is determined to be the second cleaning mode, proceed to step 6); the intensity of the first cleaning mode is less than that of the second cleaning mode.

[0028] 6) Determine whether the viscosity of the sewage in the oil collection tank exceeds a preset threshold value. If not, control the opening angle of the check valve flap of the air outlet mask of the range hood to be θ1; if the viscosity of the sewage exceeds the preset threshold value, proceed to step 7).

[0029] 7) Start the steam generator. The hot water after heat exchange of the cooker will be heated to a preset temperature again by the steam generator and transported to the gap between the oil collection tank and the housing through the fourth conduit to heat the sewage in the oil collection tank to reduce the viscosity of the sewage; then close the check valve flap and discharge the sewage by using the static pressure of the pressure.

[0030] 8) When discharging the sewage, determine whether the difference between the pressure of the fourth valve and the pressure in the oil collection tank exceeds a preset pressure difference threshold value. If it does, start the steam generator, spray high-temperature steam, transport it to the oil collection tank through the air outlet mask, and then proceed to step 9); if not, directly proceed to step 9).

[0031] 9) When the liquid level sensor detects that the current liquid level height H < h1, the sewage discharge program ends.

[0032] 10) Determine whether h3 > H > h2 holds. If it does, it means that the current liquid level height is at a high level, and proceed to step 11).

[0033] 11) Determine whether the range hood needs to be cleaned at this time. If it does, proceed to step 12); if not, proceed to step 13).

[0034] 12) Determine the cleaning mode required by the range hood. If it is determined to be the first cleaning mode, after the cleaning is completed, after the cleaning is completed, proceed to step 13); if it is determined to be the second cleaning mode, proceed to step 16); the intensity of the first cleaning mode is less than that of the second cleaning mode.

[0035] 13) The sewage discharge component is started to discharge the sewage to a low level so that H is between h1 and h2; then make i = i + 1.

[0036] 14) Determine whether i ≤ n holds. If it does, proceed to step 15); if not, proceed to step 17); n is the threshold value of the preset number of times of discharging from a high level to a low level.

[0037] 15) The check valve is controlled to open at an angle of θ2, and θ2>θ1 is satisfied. The fourth valve is opened, the fan system is operated, and sewage is discharged. When the liquid level H is detected to satisfy h2>H>h1, the sewage discharge procedure is terminated;

[0038] 16) Start the sewage discharge component to drain the sewage in the oil collection tank. At this time, the check valve will first open the angle θ2, the fourth valve will open, and the fan system will run to discharge the sewage to a low position, so that h2>H>h1 is satisfied, and enter step 17);

[0039] 17) Detect the viscosity of the current sewage in the oil collection tank. If the detected sewage viscosity does not exceed the preset threshold, open the non-return valve of the air outlet cover of the range hood by an angle of θ1, and at the same time open the fourth valve, start the fan system, continue to discharge sewage, and enter step 19); if the detected liquid viscosity exceeds the preset threshold, enter step 18);

[0040] 18) Start the steam generator. The hot water after the stove heat exchange will be heated to a preset temperature again by the steam generator and passed into the gap between the shell and the oil collecting tank through the fourth conduit to heat the sewage in the oil collecting tank to reduce the viscosity of the sewage. Then close the check valve, and keep the fourth valve open to discharge the sewage by using the static pressure.

[0041] 19) When discharging sewage, determine whether the difference between the pressure of the fourth valve and the pressure in the oil collecting tank exceeds the preset pressure difference threshold. If yes, start the steam generator to heat the water to a preset temperature, spray high-temperature steam to quickly dredge the pipeline, and then enter step 20); if no, directly enter step 20);

[0042] 20) The liquid level sensor detects the current liquid level H and determines whether 0≤H

[0043] Compared with the prior art, the advantages of the present invention are: by arranging water inlet and outlet pipes, water can be supplied to the steamer, the water tank of the steamer is omitted, and there is no need to add water manually, which reduces the labor of users; at the same time, the waste heat of the stove is used to heat the water, which can reduce the power consumption of the steam generator and extend its service life; the cleaning of the range hood and the steamer share a steam generator with a simple structure; the range hood can select two modes of steam washing and hot water washing, and the overall layout is compact, which reduces the production cost; the fan system of the range hood can achieve low-level oil discharge, which solves the problem that the integrated stove cannot rely solely on gravity to discharge oil due to the low position of the oil collecting tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 ​is a schematic diagram of an integrated cooking appliance according to an embodiment of the present invention;

[0045] Figure 2 A schematic diagram of a cabinet in which an integrated cooking appliance hides a stove body according to an embodiment of the present invention;

[0046] Figure 3 A schematic diagram of an integrated cooking appliance according to an embodiment of the present invention, in which an air inlet assembly, a cabinet and a steam box are hidden;

[0047] Figure 4 A schematic diagram of a cooker and pipelines of an integrated cooking appliance according to an embodiment of the present invention;

[0048] Figure 5 is a partial schematic diagram of an integrated cooking appliance according to an embodiment of the present invention;

[0049] Figure 6 A schematic diagram of a fan system and a sewage discharge assembly of an integrated cooking appliance according to an embodiment of the present invention;

[0050] Figure 7 A cross-sectional view of a sewage discharge assembly of an integrated cooking appliance according to an embodiment of the present invention (in an open state);

[0051] Figure 8 is a cross-sectional view of a sewage discharge assembly of an integrated cooking appliance according to an embodiment of the present invention (closed state);

[0052] Fig. 9 A schematic diagram of a sealing member of a sewage discharge assembly of an integrated cooking appliance according to an embodiment of the present invention;

[0053] Fig.10 A schematic diagram of the oil drainage principle of the integrated cooking appliance according to an embodiment of the present invention;

[0054] Fig.11 Schematic diagram of the integrated cooking appliance with hidden air inlet assembly, cabinet and steam box according to the embodiment of the present invention (the angle of the check valve of the fan system is Figure 3 );

[0055] Fig.12 The figure is a flow chart of a control method of an integrated cooking appliance according to an embodiment of the present invention. DETAILED DESCRIPTION

[0056] 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.

[0057] 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.

[0058] See also Figure 1 to Figure 5 An integrated cooking appliance includes a range hood 1 and a stove body 2, wherein the range hood 1 includes an air inlet assembly 11 and a fan frame 12 disposed below the air inlet assembly 11, a fan system 13 is disposed in the fan frame 12, and an air inlet 111 is provided on the air inlet assembly 11. The air inlet assembly 11 and the fan frame 12 form an inner cavity in fluid communication.

[0059] The stove body 2 is arranged below the range hood 1, and includes a cabinet 21, a stove 22 arranged on the top of the cabinet 21, and a steam box 23 arranged inside the cabinet 21. The stove 22 includes a stove panel 221, a stove head 222 arranged on the stove panel 221, and a knob-type switch 223. The stove head 222 has two stove heads 222 arranged at intervals on the left and right. The switch 223 is used to control the operation of the stove head 222. An energy-gathering ring 224 is arranged on the periphery of each stove head 222 to reflect the heat generated by the stove head 222 and improve the heating efficiency. The steam box 23 includes a box 231, a steam generator 232 and an electrical box 233, wherein the steam generator 232 and the electrical box 233 are both arranged outside the box 231.

[0060] The air inlet assembly 11 is arranged on the upper rear side of the cabinet 21, and the fan frame 12 and the fan system 13 are arranged in the cabinet 21. Since the fan frame 12 and the fan system 13 are arranged in the cabinet 21, cleaning the inner cavity of the range hood 1 of the integrated cooking appliance has always been a headache for users. To this end, the integrated cooking appliance of the present invention also includes a cleaning device, including a water inlet pipe 31, a water outlet pipe 32 and a sewage pipe 33, wherein one end of the water inlet pipe 31 extends out of the cabinet 21 to facilitate connection with an external tap water pipe, and can also be connected to other cleaning medium sources, such as cleaning agents. The water inlet pipe 31 extends from this end to the bottom of the electrical box 233 of the steamer 23, and is in a parallel reflux shape at a position corresponding to the electrical box 233. When the steamer 23 is working, the electrical box 233 of the steamer 23 will have an overly high temperature due to heat radiation and its own heat generation, and a heat dissipation system needs to be set up. However, an unnecessary heat dissipation system will not only increase costs, but also cause energy waste. Therefore, in the present invention, cold water from the tap water pipe first passes through the electrical box 233 for heat exchange, so that the electrical box 233 is cooled, and at the same time, the cold water in the water inlet pipe 31 is heated here.

[0061] The cleaning device further includes a first valve 341, a second valve 342, a third valve 343, a first conduit 351 and a second conduit 352. In the present embodiment, preferably, the three valves are solenoid valves. The other end of the water inlet pipe 31 is connected to the input end of the first valve 341. There are two first conduits 351 and two second conduits 352, respectively, and each set of first conduits 351 and second conduits 352 is used to correspond to the stove 222 and the switch 223 on one side. One end of each first conduit 351 is connected to the output end of the first valve 341. After extending from the first valve 341, it first spirals through the bottom of the stove 222, then extends to the bottom of the switch 223 and also spirals under the switch 223, and then extends to the energy gathering ring 224. The energy gathering ring 224 is hollow, and the first conduit 351 is in fluid communication with the internal portion of the energy gathering ring 224. One end of the second conduit 352 is connected to the energy-gathering ring 224 and is in fluid communication with the inner fluid of the energy-gathering ring 224, and the other end of the second conduit 352 is connected to the input end of the second valve 342. The connection points of the first conduit 351 and the second conduit 352 with the energy-gathering ring 224 can be centrally symmetrically arranged relative to the bottom of the energy-gathering ring 224. Since the temperature of the stove head 222 and the switch 223 is relatively low, while the temperature inside the energy-gathering ring 224 is relatively high, the water from the water inlet pipe 31 finally passes through the energy-gathering ring 224 and then reaches the input end of the second valve 342.

[0062] When water flows into the water inlet pipe 31 and reaches the first valve 341 , the temperature sensor can be used to detect whether the left stove head 222 or the right stove head 222 is working, and then the first conduit 351 on the corresponding side is connected through the first valve 341 .

[0063] The cleaning device also includes a third conduit 353, and both ends of the third conduit 353 are respectively connected between the output end of the second valve 342 and the steam generator 232 of the steam box 23, so that the water after heat exchange between the electrical box 233 and the stove 22 will be directly connected to the steam generator 232, and the outlet of the steam generator 232 has the above-mentioned third valve 343, which can control three water outlets: 1) One way can realize steam cleaning or hot water cleaning of the range hood, and the steam and hot water can be realized by the flow of water. Specifically, one end of the above-mentioned water outlet pipe 32 is connected to one of the output ends of the third valve 343. 1) The outlet of the steam generator 232 is connected to the inner cavity of the range hood 1, and the other end extends to the inner cavity of the range hood 1. As a supply pipe for cleaning media (including water, cleaning agents, etc.), it can be combined with common cleaning mechanisms such as nozzles to clean the inner cavity of the range hood 1, including cleaning the fan system 13, filter screen, etc.; 2) The steam of another route can be directly supplied to the box body 231 of the steam box 23; 3) There is another route. When the sewage discharge component detects that the sewage is more viscous or the sewage discharge pipe 33 is blocked, the steam generator 232 will generate steam or hot water according to the actual working conditions to heat the sewage (oil-water mixture) in the sewage discharge component. This route will be described in detail below. Therefore, the power of the steam generator 233 is reduced through the heat exchange between tap water and the electrical box 233 stove 22, which reduces energy consumption, and one heating device can switch between three functions.

[0064] The water inlet pipe 31 , the first conduit 351 , the second conduit 352 and the third conduit 353 constitute a water inlet pipeline of the steam generator 232 of the steam box 23 .

[0065] See also Figure 2 , Figure 5 and Figure 6 The cleaning device further comprises a fourth conduit 354, a shell 36 and a sewage discharge assembly, wherein the sewage discharge assembly comprises an oil collecting box 371, the shell 36 is arranged at the periphery of the oil collecting box 371, and there is a certain gap between the two, one end of the fourth conduit 354 is connected to one of the output ends of the third valve 343, and the other end is connected to the shell 36, and is in fluid communication with the gap between the shell 36 and the oil collecting box 371. Since the water outlet of the external tap water is a technical problem to be solved, and since the integrated cooking appliance is relatively low and the fan system 13 is placed at the lower end, it is impossible to discharge the sewage or the waste water of the range hood cleaning to the sewer by gravity alone, so if it is desired to achieve low-level sewage discharge, a sewage discharge assembly is provided in the present invention, and its specific structure will be described in detail below.

[0066] The range hood 1 further comprises an air outlet cover 14 arranged at the air outlet of the fan system 13. The air outlet cover 14 comprises a cover body 141, a check valve plate 142 and a driving mechanism 143 for driving the check valve plate 142 to rotate. In this embodiment, the driving mechanism 143 is preferably a motor. The structure of the air outlet cover 14 is the same as that of the prior art. In addition, in this embodiment, the fan system 13 is arranged in such a way that its air outlet direction is horizontal, such as Figure 6 As shown, the air is discharged to the left, the air outlet cover 14 is arranged on the left side of the fan system 13, and the rotation axis of the non-return valve plate 142 also extends in the horizontal direction (such as the front-to-back direction).

[0067] See also Figure 6 to Figure 9 The sewage discharge assembly also includes a ventilation pipe 377, which is connected between the air outlet cover 14 and the oil collecting tank 371 of the sewage discharge assembly, so that the fluid inside the air outlet cover 14 and the oil collecting tank 371 are in communication. A fourth valve 372 is provided on the ventilation pipe 377 to control the on-off of the fluid passage between the air outlet cover 14 and the oil collecting tank 371, and the ventilation pipe 377 constitutes a booster pipeline. The sewage discharge assembly also includes a blocking member 373, an oil collecting plate 374, a liquid level sensor 375 and a viscosity sensor 376, wherein the oil collecting plate 374 is arranged on the top surface of the oil collecting tank 371, and is in a truncated cone shape that gradually sinks from the periphery to the middle, and an oil leakage hole 3741 is opened at the lower end of the oil collecting plate 374, thereby allowing the outside of the oil collecting plate 374 to communicate with the internal fluid of the oil collecting tank 371 through the oil leakage hole 3741. The above-mentioned liquid level sensor 375 and viscosity sensor 376 are arranged in the oil collecting tank 371. The blocking member 373 includes an integrally formed first flap 3731 and a second flap 3732. The top of the first flap 3731 is open to accommodate a certain amount of air. The end of the ventilation pipe 377 extends into the oil collecting tank 371 and is located above the first flap 3731. Thus, the gas introduced from the air outlet cover 14 can be pressurized and enter the first flap 3731. The blocking member 373 can be rotatably connected to the oil collecting tank 371 via a rotating shaft 3711. The rotating shaft 3711 is lateral, such as Figure 7 As shown, the first flap 3731 and the second flap 3732 extend in the front-to-back direction, and are respectively located on both sides of the rotating shaft 3711. Thus, the blocking member 373 can rotate relative to the oil collecting box 371. The position of the second flap 3732 corresponds to the oil leakage hole 3741 of the oil collecting plate 374, and the second flap 3732 can be located at the bottom of the oil leakage hole 3741 to block the oil leakage hole 3741 of the oil collecting plate 374, see Figure 8 , the second flap 3732 can rotate away from the oil collecting plate 374 after being subjected to force, thereby opening the oil leakage hole 3741, see Figure 7 In the absence of external force, the weight of the first flap 3711 and the second flap 3732 on both sides of the rotating shaft 3711 is balanced, and the balance state is located at Figure 7 and Figure 8 An intermediate state between the two states shown.

[0068] One end of the sewage pipe 33 is connected to the oil collecting tank 371 and communicates with the fluid in the oil collecting tank 371 , and the other end extends out of the cabinet 21 and is connected to the sewer.

[0069] The fan system 13 includes a volute 131 and an impeller 132 disposed at the volute 131. The oil collecting box 371 is disposed below the fan system 13. An oil drain hole can be provided at a position of the volute 131 directly above the oil collecting plate 374, so that the sewage in the volute 131 can drip directly onto the oil collecting plate 374. If the sewage does not drip vertically but contacts other positions on the top surface of the oil collecting box 371, it can also be collected in the oil collecting plate 374 due to the shape of the oil collecting plate 374. When the sewage in the oil collecting plate 374 increases and breaks the balance of the blocking member 373, the second flap 3732 will drop, and the sewage will smoothly enter the oil collecting box 371 through the oil leakage hole 3741.

[0070] When the oil needs to be discharged, the range hood 1 is started, the fourth valve 372 is opened, and high-pressure gas will enter the oil collecting box 371 through the fifth conduit 377. The air with speed will first impact the first flap 3731 of the blocking member 373, breaking the balance, so that the second flap 37 rotates upward and forms a seal with the oil leakage hole 3741 of the oil collecting plate 374. Since high-pressure gas continues to enter the oil collecting box 371, the pressure in the oil collecting box 371 will continue to increase. When the pressure inside the oil collecting box 371 reaches a level that overcomes the gravity of the sewage discharged from the oil collecting box 371, the sewage in the oil collecting box 371 can be discharged.

[0071] The fourth conduit 354 mentioned above can pass steam or hot water into the gap between the shell 36 and the oil collecting tank 371 to heat the sewage in the oil collecting tank 371, thereby increasing the fluidity of the sewage in the oil collecting tank 371 and facilitating the discharge of the sewage in the oil collecting tank 371.

[0072] See also Fig.12 , is a flow chart of a control method of an integrated cooking appliance of the present invention, specifically, comprising the following steps:

[0073] 1) After the start, the liquid level H in the oil collecting tank 371 is detected by the liquid level sensor 375 and recorded in the system of the integrated cooking appliance; the system of the integrated cooking appliance is preset with a first height threshold h1, a second height threshold h2 and a third height threshold h3, and h3>h2>h1, h1 is the low oil discharge height of the oil collecting tank 371, h3 is the high oil discharge height of the oil collecting tank 371, and h2 is between h1 and h3; the number of oil discharges from high to low is set to i, initially i=0, each time the oil is discharged from high to low, it will be accumulated once, i=i+1, because of the height difference, it is much easier to discharge from high to low than to empty from low, but if the low position is emptied every time, due to the viscosity of grease, it will be difficult to discharge over time, so a threshold of the number is set, and when the number threshold n is reached, such as 5 times, the sewage will be emptied to prevent too much viscous grease from accumulating at the bottom of the oil collecting tank 371;

[0074] 2) Compare the detected current liquid level H with h1. If H>h1, the viscosity sensor 376 will be activated to detect the viscosity of the sewage in the oil collecting tank 371, and enter step 3); if H≤h1, the viscosity detection will not be activated;

[0075] 3) Determine whether h2>H>h1 is established. If so, it means that the current liquid level is at the lower position between h1 and h2, and go to step 4). If not, go to step 10);

[0076] 4) It is judged whether the range hood needs to be cleaned at this time, which can be achieved by setting a fume sensor and detecting the accumulated amount of fume. Of course, it can also be judged by other existing methods, such as detecting the weight of the filter, the accumulated working time, etc.; when it is detected that the accumulated amount of fume reaches the threshold value that needs to be cleaned, the range hood needs to be cleaned at this time, and the process goes to step 5); if it does not need to be cleaned, there is no need to start the sewage discharge component;

[0077] 5) Since the ease of cleaning of grease varies under the same amount of oil smoke, mainly due to the difference in time, the longer the interval between oil smoke, the harder it is to clean. Therefore, under the same amount of oil smoke, the last cleaning time of the range hood can be used to determine whether the range hood needs the first cleaning mode (normal cleaning) or the second cleaning mode (powerful cleaning). Normal cleaning requires less water, so not much water flows into the oil collection tank. Powerful cleaning requires more water, so a lot of water flows into the oil collection tank 371. If it is determined to be the first cleaning mode, the sewage discharge component will not be started after the cleaning is completed. If it is determined to be the second cleaning mode, go to step 6);

[0078] 6) After the cleaning is completed, since there is more sewage generated in the second cleaning mode and there is a risk of overflow in the oil collecting tank 371, it is necessary to start the sewage discharge component. At this time, first detect the viscosity of the current sewage in the oil collecting tank 371. Because the greater the viscosity, the greater the resistance of the liquid flowing in the pipeline. If the detected sewage viscosity does not exceed the preset threshold, then the check valve piece 142 of the air outlet mask 14 of the range hood 1 needs to be opened by an angle θ1, see Figure 3 , and go to step 8); here θ1 can be calculated according to H, see Fig.10 , P = ρgH p , Hp is the height of the sewage discharge pipe 33 from the bottom surface of the oil collecting tank 371, and the performance of the fan system 13 can be measured by the PQ curve in the laboratory, and then the PQ curve of the range hood can be obtained. This curve shows that as the flow rate Q increases, the pressure P decreases. When the flow rate is 0, the pressure is the largest, but the noise will increase. The flow rate is related to the outlet wind speed V and the outlet cross-section S, Q = SV. According to S, the angle θ1 of the check valve piece 142 can be calculated; if the detected liquid viscosity exceeds the preset threshold, then it is very difficult to discharge the sewage only relying on the dynamic pressure of the fan system 13, so enter step 7);

[0079] 7) Start the steam generator 232. The hot water after heat exchange of the cooking appliance 22 will be heated to the preset temperature again by the steam generator 232, and then it is passed through the fourth conduit 354 into the gap between the housing 36 and the oil collecting tank 371 to heat the sewage in the oil collecting tank 371 to reduce the viscosity of the sewage; then the check valve piece 142 will be closed, and the sewage will be discharged by using the static pressure. It can be seen from the PQ curve that under the same conditions, as the flow rate increases, the outlet pressure of the fan will decrease. When the flow rate is 0, the pressure is the largest, but the noise will also increase;

[0080] 8) When discharging the sewage, judge whether the difference between the pressure of the fourth valve 372 and the pressure in the oil collecting tank 371 exceeds the preset pressure difference threshold. If so, for example where Pd is the pressure at the fourth valve 372 and Pq is the pressure in the oil collecting tank 371, it means that the sewage discharge pipe 33 is blocked. At this time, the steam generator 232 will be started to heat the water to the preset temperature, spray high-temperature steam, and send it into the oil collecting tank 371 through the air outlet 14 to quickly dredge the pipeline, and then enter step 9); if not, directly enter step 9);

[0081] 9) When the liquid level sensor 375 detects that the current liquid level height H < h1, the sewage discharge program ends;

[0082] 10) Judge whether h3 > H > h2 holds. If so, it means that the current liquid level height is at a high level, and enter step 11);

[0083] 11) Determining whether the range hood needs to be cleaned at this time can be achieved by setting a smoke sensor and detecting the accumulated smoke volume as in step 4). Of course, it can also be determined by other existing methods, such as detecting the filter weight, the accumulated working time, etc. When it is detected that the accumulated smoke volume reaches the threshold value requiring cleaning, the range hood needs to be cleaned at this time, and the process goes to step 12); if it does not need to be cleaned, the process goes to step 13);

[0084] 12) Determine whether the range hood 1 needs ordinary cleaning or strong cleaning. The determination method can be the same as step 5). If it is determined to be the first cleaning mode, then after the cleaning is completed, proceed to step 13); if it is determined to be the second cleaning mode, proceed to step 16);

[0085] 13) The sewage discharge component is started to discharge the sewage to a low position (H is between h1 and h2); then i=i+1;

[0086] 14) Determine whether i≤n (n may be equal to 5, for example). If yes, proceed to step 15); if no, proceed to step 17); n is a preset threshold value of the number of times from high to low;

[0087] 15) Check valve opening angle θ2, θ2 is calculated in the same way as θ1, and θ2>θ1, see Fig.11 , the fourth valve 372 is opened, the fan system 13 is running, and sewage begins to be discharged. When it is detected that the liquid level H reaches a low level (h2>H>h1), the sewage discharge procedure is terminated;

[0088] 16) Start the sewage discharge assembly to drain the sewage in the oil collecting tank 371. At this time, the check valve 142 will first open at an angle θ2, see Fig.11 , the fourth valve 372 is opened, the fan system 13 is running, and the sewage is discharged to a low level (h2>H>h1), and the process goes to step 17);

[0089] 17) Detect the viscosity of the current sewage in the oil collecting box 371. If the detected sewage viscosity does not exceed the preset threshold, the non-return valve plate 142 of the air outlet cover 14 of the range hood 1 needs to be opened by an angle θ1, see Figure 3 At the same time, the fourth valve 372 is opened, the fan system 13 is opened, and the sewage is continued to be discharged, and the process proceeds to step 19); if the detected liquid viscosity exceeds the preset threshold, it is difficult to discharge the sewage by relying solely on the dynamic pressure of the fan system 13, and the process proceeds to step 18);

[0090] 18) Start the steam generator 232. The hot water after heat exchange in the cooker 22 will be heated to a preset temperature again through the steam generator 232, and will be passed into the gap between the shell 36 and the oil collecting tank 371 through the fourth conduit 354 to heat the sewage in the oil collecting tank 371 to reduce the viscosity of the sewage. Then the check valve plate 142 will be closed, and the fourth valve 372 will still be opened to discharge the sewage by the static pressure. It can be seen from the PQ curve that under the same conditions, as the flow rate increases, the outlet pressure of the fan will decrease. When the flow rate is 0, the pressure is the maximum, but the noise will also increase.

[0091] 19) When discharging sewage, detect whether the difference between the pressure of the fourth valve 372 and the pressure in the oil collecting tank 371 exceeds the preset pressure difference threshold. If so, for example Wherein Pd is the pressure at the fourth valve 372, and Pq is the pressure in the oil collecting tank 371, which means that the sewage pipe 33 is blocked. At this time, the steam generator 232 will be started to heat the water to a preset temperature and spray high-temperature steam to quickly dredge the pipeline, and then enter step 20); if not, directly enter step 20);

[0092] 20) The liquid level sensor 375 detects the current liquid level H and determines whether 0≤H

[0093] The "fluid connection" referred to in the present invention refers to the spatial position relationship between two parts or parts (hereinafter collectively referred to as the first part and the second part respectively), that is, the fluid (gas, liquid or a mixture of the two) can flow from the first part along the flow path or / and be transported to the second part. The first part and the second part can be directly connected, or the first part and the second part can be indirectly connected through at least one third party. The third party can be a fluid channel such as a pipe, channel, duct, guide member, hole, groove, etc., or it can be a chamber allowing fluid to flow through, or a combination of the above.​

Claims

1. An integrated cooking appliance, comprising a range hood (1), a stove body (2) and a cleaning device, wherein the stove body (2) comprises a cabinet (21), a stove (22) arranged on the top of the cabinet (21) and a steam box (23) arranged in the cabinet (21), wherein the steam box (23) comprises a cabinet (231) and a steam generator (232) arranged outside the cabinet (231), characterized in that: The cleaning device comprises a water inlet pipeline connected to an external water pipe, the water inlet pipeline passes through the stove (22) to achieve heat exchange and is connected to the steam generator (232), the steam generator (232) is in fluid communication with the interior of the box (231) and the interior of the range hood (1); The range hood (1) comprises an air inlet assembly (11) arranged above a cabinet (21) and a fan system (13) arranged inside the cabinet (21); an air inlet (111) is provided on the air inlet assembly (11); the cleaning device further comprises a sewage discharge assembly, the sewage discharge assembly comprises an oil collecting box (371) arranged below the fan system (13) for collecting sewage flowing down from the fan system (13) and a sewage discharge pipe (33); the sewage discharge pipe (33) is used to discharge sewage in the oil collecting box (371) to a sewer; The sewage discharge assembly also includes an oil collecting plate (374), which is arranged on the top surface of the oil collecting tank (371), and is in the shape of a truncated cone that gradually sinks from the periphery to the middle, and an oil leakage hole (3741) is opened at the lower end of the oil collecting plate (374), so that the outside of the oil collecting plate (374) is in fluid communication with the inside of the oil collecting tank (371) through the oil leakage hole (3741); The range hood (1) further comprises an air outlet cover (14) arranged at the air outlet of the fan system (13); the sewage discharge assembly further comprises a ventilation pipe (377); the ventilation pipe (377) is connected between the air outlet cover (14) and the oil collecting box (371) of the sewage discharge assembly, so that the interior of the air outlet cover (14) and the oil collecting box (371) are fluidically connected; the sewage discharge assembly further comprises a blocking member (373); the blocking member (373) is rotatably arranged in the oil collecting box (371) via a transversely extending rotating shaft (3711); the blocking member (373) can be turned over and blocked from the oil leakage hole (3741) when subjected to pressure from the air outlet cover (14); the blocking member (373) maintains a tendency to open the oil leakage hole (3741); The blocking member (373) comprises a first flap (3731) and a second flap (3732) formed in one piece, the top of the first flap (3731) is open, and the end of the ventilation pipe (377) extends into the oil collecting tank (371) and is located above the first flap (3731); The cleaning device further comprises a fourth conduit (354) and a shell (36), wherein one end of the fourth conduit (354) is connected to the outlet of the steam generator (232), and the other end is connected to the shell (36) and is in fluid communication with a gap between the shell (36) and the oil collecting tank (371).

2. The integrated cooking appliance according to claim 1, characterized in that: The steam box (23) further comprises an electrical box (233) arranged outside the box body (231); the water inlet pipeline comprises a water inlet pipe (31); one end of the water inlet pipe (31) extends outside the box body (21) and is used to be connected to a tap water pipe; the water inlet pipe (31) also passes under the electrical box (233) to achieve heat exchange.

3. The integrated cooking appliance according to claim 2, characterized in that: The positions corresponding to the water inlet pipe (31) and the electrical box (233) are in a parallel reflux shape.

4. The integrated cooking appliance according to claim 2, characterized in that: The water inlet pipeline further comprises a first conduit (351) and a second conduit (352); the first conduit (351) is used to communicate with the water inlet pipe (31); the second conduit (352) is used to communicate with the steam generator (232); the stove (22) comprises a stove top panel (221), a stove head (222) and a switch (223) arranged on the stove top panel (221); an energy gathering ring (224) is arranged on the periphery of the stove head (222); the first conduit (351) and the second conduit (352) as a whole exchange heat with the stove head (222), the switch (223) and the energy gathering ring (224).

5. The integrated cooking appliance according to claim 4, characterized in that: The cleaning device further comprises a first valve (341) and a second valve (342); the water inlet pipe (31) is connected to the input end of the first valve (341); one end of the first conduit (351) is connected to the output end of the first valve (341); the first conduit (351) passes through the bottom of the stove head (222) and the switch (223) in sequence and extends to the energy gathering ring (224); one end of the second conduit (352) is connected to the energy gathering ring (224); the other end of the second conduit (352) is connected to the input end of the second valve (342); the energy gathering ring (224) is hollow in shape; the first conduit (351) and the second conduit (352) are respectively in communication with the internal fluid of the energy gathering ring (224); the output end of the second valve (342) is connected to the steam generator (232) of the steam box (23) through the third conduit (353).

6. The integrated cooking appliance according to claim 5, characterized in that: The cleaning device also includes a third valve (343) and a water outlet pipe (32); the outlet of the steam generator (232) is connected to the third valve (343); one output of the third valve (343) is connected to the interior of the range hood (1) through the water outlet pipe (32); and the other output of the third valve (343) is directly connected to the interior of the box (231) of the steam box (23).

7. The integrated cooking appliance according to claim 1, characterized in that: The ventilation pipe (377) is provided with a fourth valve (372) for controlling the on-off of the fluid passage between the air outlet cover (14) and the oil collecting tank (371), and the sewage discharge assembly also includes a liquid level sensor (375) and a viscosity sensor (376) arranged in the oil collecting tank (371).

8. A control method for an integrated cooking appliance according to claim 7, wherein the air outlet cover (14) of the integrated cooking appliance comprises a non-return valve plate (142), characterized in that: The control method comprises the following steps: 1) After starting, the liquid level H in the oil collecting tank (371) is detected by a liquid level sensor (375) and recorded; the integrated cooking appliance is preset with a first height threshold h1, a second height threshold h2 and a third height threshold h3, and h3>h2>h1 is satisfied, h1 is the low oil discharge height of the oil collecting tank (371), h3 is the high oil discharge height of the oil collecting tank (371), and h2 is between h1 and h3; the number of times of oil discharge from high position to low position is set to i, initially i=0, and each time oil is discharged from high position to low position, it is accumulated once, i=i+1; 2) Compare the detected current liquid level height H with h1. If H > h1, start the viscosity sensor (376) to detect the viscosity of the sewage in the collection tank (371), and proceed to step 3); if H ≤ h1, do not start the viscosity detection; 3) Determine whether h2 > H > h1 holds. If so, it means the current liquid level height is at a low level between h1 and h2, and proceed to step 4); if not, proceed to step 10); 4) Determine whether the range hood needs to be cleaned at this time. If so, proceed to step 5); if not, there is no need to start the sewage discharge component; 5) Determine the cleaning mode required for the range hood (1). If it is determined to be the first cleaning mode, after the cleaning is completed, the sewage discharge component is not started; if it is determined to be the second cleaning mode, proceed to step 6); the intensity of the first cleaning mode is less than that of the second cleaning mode; 6) Determine whether the viscosity of the sewage in the collection tank (371) exceeds the preset threshold. If not, control the opening angle of the check valve piece (142) of the air outlet mask (14) of the range hood (1) to be θ1; if the sewage viscosity exceeds the preset threshold, proceed to step 7); 7) Start the steam generator (232). The hot water after heat exchange of the cooker (22) will be heated to the preset temperature again by the steam generator (232) and conveyed to the gap between the collection tank (371) and the housing (36) through the fourth conduit (354) to heat the sewage in the collection tank (371) to reduce the viscosity of the sewage; Then close the check valve piece (142) and discharge the sewage using the static pressure of the pressure; 8) When discharging the sewage, determine whether the difference between the pressure of the fourth valve (372) and the pressure in the collection tank (371) exceeds the preset pressure difference threshold. If so, start the steam generator (232) to spray high-temperature steam, convey it into the collection tank (371) through the air outlet mask (14), and then proceed to step 9); if not, directly proceed to step 9); 9) When the liquid level sensor (375) detects that the current liquid level height H < h1, the sewage discharge program ends; 10) Determine whether h3 > H > h2 holds. If so, it means the current liquid level height is at a high level, and proceed to step 11); 11) Determine whether the range hood (1) needs to be cleaned at this time. If so, proceed to step 12); if not, proceed to step 13); 12) Determine the cleaning mode required for the range hood (1). If it is determined to be the first cleaning mode, after the cleaning is completed, after the cleaning is completed, proceed to step 13); if it is determined to be the second cleaning mode, proceed to step 16); the intensity of the first cleaning mode is less than that of the second cleaning mode; 13) Start the sewage discharge component to discharge the sewage to a low level so that H is between h1 and h2; then make i = i + 1; 14) Determine whether i ≤ n holds. If so, proceed to step 15); if not, proceed to step 17); n is the threshold value of the preset number of times of discharging from the high level to the low level; 15) Control the opening angle of the check valve plate (142) to be θ2, and satisfy θ2>θ1, the fourth valve (372) is opened, the fan system (13) is operated, and sewage is discharged. When it is detected that the liquid level H satisfies h2>H>h1, the sewage discharge procedure is terminated; 16) Start the sewage discharge assembly to drain the sewage in the oil collecting tank (371). At this time, the check valve plate (142) will first open the angle θ2, the fourth valve (372) will open, and the fan system (13) will operate to discharge the sewage to a low position, so that h2>H>h1 is satisfied, and then proceed to step 17); 17) Detect the viscosity of the current sewage in the oil collecting box (371); if the detected sewage viscosity does not exceed the preset threshold, open the non-return valve plate (142) of the air outlet cover (14) of the range hood (1) by an angle θ1, and at the same time open the fourth valve (372), open the fan system (13), continue to discharge sewage, and enter step 19); if the detected liquid viscosity exceeds the preset threshold, enter step 18); 18) starting the steam generator (232), the hot water after heat exchange in the cooker (22) is heated again to a preset temperature by the steam generator (232), and is passed through the fourth conduit (354) into the gap between the housing (36) and the oil collecting tank (371), thereby heating the sewage in the oil collecting tank (371) to reduce the viscosity of the sewage; then closing the check valve plate (142), while keeping the fourth valve (372) open, and using the static pressure to discharge the sewage; 19) When discharging sewage, determine whether the difference between the pressure of the fourth valve (372) and the pressure in the oil collecting tank (371) exceeds a preset pressure difference threshold value. If yes, start the steam generator (232), heat the water to a preset temperature, spray high-temperature steam to quickly dredge the pipeline, and then enter step 20); if no, directly enter step 20); 20) The liquid level sensor (375) detects the current liquid level H and determines whether 0≤H<h1 is established. If so, the sewage discharge procedure ends; if not, return to step 17).

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