An integrated cooking appliance and its control method

Abstract

The present invention discloses an integrated cooking appliance and a control method thereof. The integrated cooking appliance includes a range hood, a cooking range body, and a cleaning device. The range hood includes an air inlet assembly at least partially located above the cooking range body. An air inlet is formed on the air inlet assembly, and an air inlet flow channel is formed inside the air inlet assembly. It is characterized in that: the cleaning device includes a water tank arranged inside the air inlet assembly. The water tank has a wall surface in contact with the air inlet flow channel, and the water tank can be in fluid communication with a cold water source. Compared with the prior art, the advantages of the present invention are as follows: by arranging a water tank connected to the cold water source, it can condense and filter the oil fume in the air inlet flow channel, eliminating the filter screen, ensuring the oil separation degree, and at the same time reducing the flow channel resistance.

Description

Technical Field

[0001] The present invention relates to kitchen appliances, in particular to an integrated cooking appliance and a control method thereof. Background Art

[0002] The range hood has become one of the indispensable kitchen appliances in modern families. The range hood works based on the principle of fluid dynamics. It sucks and discharges oil fumes through a centrifugal fan installed inside the range hood, and uses a filter screen to filter some oil particle. 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, a negative pressure suction is generated at the center of the fan, sucking the oil fumes below the range hood into the fan. After being accelerated by the fan, the oil fumes are collected by the volute and guided out of the room.

[0003] During the use of the range hood, a large amount of oil stains will accumulate on the fan. These oil stains are likely to cause blockage, increased load, etc., affecting the use effect of the range hood. For this reason, there are already some range hoods with self-cleaning functions. With the continuous progress of the self-cleaning technology of range hoods, steam cleaning or water cleaning has been widely used in the self-cleaning field of range hoods. Its basic principle is that a steam generator generates steam or a water pump pumps water, and the steam or water is transported to the nozzle at the end of the spray pipe. The steam or water quickly sprays out from the nozzle to wash the impeller and the 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 a Chinese patent with the application number 201620368078.3 includes an oil fume filtering box body and an air suction box body, with 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 spraying device facing the impeller is installed on the air duct housing, including a shower head. The water inlet interface of the shower head is externally connected to a water tank and a water pump. 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 kind of self-cleaning range hood uses a water tank to store cleaning water, which greatly limits the self-cleaning time, range and cleaning cleanliness of the range hood, making it unable to effectively solve the problem. Moreover, once the user loses the water box or water cup, the self-cleaning function cannot be applied; only the fan (or the impeller of the fan) is cleaned, and the inner cavity of the range hood is not comprehensively cleaned; in order to reduce the cleaning frequency of the impeller, a filter screen is often placed in the inner cavity of the range hood to filter and intercept the oil fumes, but the cleaning of the filter screen is relatively troublesome, and the placement of the filter screen will also generate a certain resistance, affecting the air volume. Summary of the Invention

[0006] The first technical problem to be solved by the present invention is to provide an integrated cooking appliance in view of the deficiencies of the above-mentioned prior art, ensuring the oil separation degree and reducing the flow channel resistance at the same time.

[0007] The second technical problem to be solved by the present invention is to provide a control method applied to the above integrated cooking device.

[0008] The technical solution adopted by the present invention to solve the above first technical problem is: an integrated cooking appliance, including a range hood, a stove body and a cleaning device. The range hood includes an air inlet component at least partially located above the stove body. An air inlet is formed on the air inlet component, and an air inlet flow channel is formed in the air inlet component. It is characterized in that: the cleaning device includes a water tank arranged in the air inlet component. The water tank has a wall surface in contact with the air inlet flow channel, and the water tank can be in fluid communication with a cold water source.

[0009] To facilitate the operation of water inlet into the water tank and avoid frequent manual addition, the first chamber is connected to a water supply pipe through a first water inlet pipe, and a first water inlet valve is arranged on the first water inlet pipe to make the first water inlet pipe communicate with or disconnect from the first chamber.

[0010] To facilitate the cleaning of the range hood, a partition is arranged in the water tank. The partition divides the space in the water tank into a first chamber close to the air inlet flow channel and a second chamber far from the air inlet flow channel. The first chamber can be in fluid communication with a cold water source, and the second chamber can be in fluid communication with a hot water source for cleaning the range hood.

[0011] To heat the water for cleaning, the stove body includes a cooking appliance, and the cleaning device further includes a water inlet pipeline. The water inlet pipeline passes through the cooking appliance for heat exchange and is connected to the second chamber.

[0012] Preferably, to make full use of the waste heat of the cooking appliance, the cooking appliance includes a stove top panel, a burner head arranged on the stove top panel and a switch. A heat collecting ring is arranged on the outer periphery of the burner head. The water inlet pipeline includes a second water inlet pipe connected to an external water supply pipe, and a first conduit and a second conduit that pass under the burner head, the switch and the heat collecting ring for heat exchange.

[0013] More preferably, to make full use of the waste heat of the cooker, the water inlet pipeline further includes a second water inlet valve, a first water outlet valve, a first water outlet pipe and a third conduit. The second water inlet pipe is connected to the input end of the second water inlet valve; one end of the first conduit is connected to the output end of the second water inlet valve. The first conduit extends through the burner head and below the switch and then reaches the energy-gathering ring. One end of the second conduit is connected to the energy-gathering ring, and the other end of the second conduit is connected to the input end of the first water outlet valve. The energy-gathering ring is in a hollow shape, and the first conduit and the second conduit are respectively in fluid communication with the inside of the energy-gathering ring; the output end of the first water outlet valve is used as a hot water source and is connected to the second chamber through the third conduit.

[0014] To facilitate the hot water cleaning of the fan system in the second chamber, the range hood includes a fan system, and the cleaning device further includes a first water outlet pipe. One end of the first water outlet pipe is connected to the second chamber and is in fluid communication with the inside of the second chamber, and the other end of the first water outlet pipe extends to the fan system of the range hood.

[0015] To facilitate the hot water cleaning of the air inlet channel in the second chamber, the cleaning device further includes a second water outlet pipe. One end of the second water outlet pipe is connected to the second chamber and is in fluid communication with the inside of the second chamber, and the other end of the second water outlet pipe extends into the air inlet channel. The cleaning device further includes a spray pipe arranged in the air inlet channel and a nozzle arranged on the spray pipe. The spray pipe is connected to the second water outlet pipe and is in fluid communication, and the nozzle is in fluid communication with the spray pipe to clean the air inlet channel.

[0016] To facilitate oil removal and water drainage in the air inlet channel, an oil removal and water drainage device is arranged in the air inlet channel. The oil removal and water drainage device includes a flap assembly that can rotate in the air inlet channel. One side of the flap assembly is in contact with the inner side of the front side wall surface of the air inlet assembly, and the other side of the flap assembly is in contact with the outer side of the wall surface of the water tank facing the air inlet channel, so as to scrape off the oil stains on the outer peripheral wall surface of the air inlet assembly in the air inlet channel and reflect the cleaning medium sprayed by the nozzle into the air inlet channel.

[0017] Preferably, to make the hot water sprayed by the nozzle evenly distributed in the air inlet channel, the flap fixing frame and the nozzle are respectively arranged on the left and right sides in the air inlet channel. The flap fixing frame can move in the left-right direction. The flap assembly includes an upper flap and a lower flap, and both the upper flap and the lower flap are rotatably connected to the flap fixing frame and can rotate around an axis extending in the front-rear direction.

[0018] To facilitate the entry of hot water into the first chamber to melt the oil stains on the wall surface facing the air inlet channel, a valve is arranged on the partition plate to connect or close the first chamber and the second chamber.

[0019] To facilitate the cleaning of the air inlet flow passage, the cleaning device further includes a spray pipe disposed in the air inlet flow passage and a nozzle disposed on the spray pipe. The spray pipe is used to input a cleaning medium, and the nozzle is in fluid communication with the spray pipe to clean the air inlet flow passage.

[0020] The technical solution adopted by the present invention to solve the above second technical problem is as follows: A control method for an integrated cooking appliance as described above, characterized in that it includes the following steps:

[0021] 1) After starting, determine whether the air inlet flow passage needs to be cleaned. If so, proceed to step 2); if not, repeat this step.

[0022] 2) Determine whether the water temperature in the second chamber has reached the temperature at which oil stains can be cleaned. If not, proceed to step 3); if so, proceed to step 4).

[0023] 3) Detect the temperature of the water in the cooking appliance. If the temperature of the cooking appliance reaches the preset threshold, transfer the temperature in the cooking appliance to the second chamber of the water tank and proceed to step 4); if the temperature of the cooking appliance does not reach the preset threshold, wait until the next cooking ends and then detect again.

[0024] 4) The nozzles in the air inlet flow passage start to spray water, and the upper flap and the lower flap rotate in cooperation with the nozzles; meanwhile, the hot water in the second chamber enters the first chamber to heat the wall surface where the water tank contacts the air inlet flow passage, and then proceed to step 5).

[0025] 5) Detect the pollution conditions on the left and right sides in the air inlet flow passage, and perform control according to the detection results, so that the flap fixing frame moves towards the nozzle, and the upper flap and the lower flap rotate.

[0026] 6) After a rough cleaning, detect and record the cleanliness of the surface of the air inlet flow passage.

[0027] 7) Control the flap fixing frame to continue to move, and cooperate with the rotation of the upper flap and the lower flap for precise cleaning. After the cleaning is completed, the upper flap and the lower flap return to their original positions.

[0028] Preferably, in step 5), perform corresponding control according to different pollution conditions:

[0029] 5.1) If the pollution on the left side is relatively heavy, control the flap fixing frame within the range of 0 - A. For every 90° rotation of the upper flap and the lower flap, the flap fixing frame moves horizontally towards the nozzle by △L; control the flap fixing frame within the range of A - B. For every 90° rotation of the upper flap and the lower flap, the flap fixing frame moves horizontally towards the nozzle by 2△L; A and B are respectively the distances between the flap fixing frame and the initial positions far from the nozzle, and B > A, 0 is the initial position of the flap fixing frame, and △L is the moving distance.

[0030] 5.2) If the pollution on the right side is relatively heavy, control the flap fixing bracket within the A-B section. For every 90° rotation of the upper flap and the lower flap, the flap fixing bracket moves horizontally towards the nozzle by ΔL; control the flap fixing bracket within the 0-A section. For every 90° rotation of the upper flap (42) and the lower flap, the flap fixing bracket moves horizontally towards the nozzle by 2ΔL;

[0031] 5.3) If the pollution conditions on the left and right are comparable, control the flap fixing bracket within the 0-B section. For every 90° rotation of the upper flap (42) and the lower flap, the flap fixing bracket moves horizontally towards the nozzle by ΔL.

[0032] Compared with the prior art, the advantages of the present invention are as follows: By providing a water tank connected to a cold water source, it is possible to condense and filter the oil fume in the air inlet channel, eliminating the need for a filter screen, ensuring the oil separation degree, and reducing the flow channel resistance at the same time; By arranging a water inlet pipe connected to a water supply pipe, manual water addition is not required, and the operation is convenient; Using the waste heat of the cooking appliance to heat the water and transfer it to the water tank, it can be used to clean the fan system and the air inlet channel of the range hood; The water tank is arranged in the air inlet channel of the range hood, and cold and hot water switching can be achieved to realize the condensation of oil fume and the cleaning of grease; An oil removal and water backflow device is arranged in the air inlet channel, which can not only clean the oil stain, but also expand the cleaning area through angle adjustment, making the internal cleaning of the range hood more thorough, eliminating the need for manual cleaning of oil stains, and having a high degree of automation. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 Schematic diagram of the integrated cooking appliance according to an embodiment of the present invention;

[0034] Figure 2 Schematic diagram of the cabinet body of the integrated cooking appliance hiding the stove body according to an embodiment of the present invention;

[0035] Figure 3 Schematic diagram of the integrated cooking appliance hiding the cabinet body and the fan bracket according to an embodiment of the present invention;

[0036] Figure 4 Schematic diagram of the cooking appliance and the pipeline of the integrated cooking appliance according to an embodiment of the present invention;

[0037] Figure 5 For Figure 3 Cross-sectional view;

[0038] Figure 6 Schematic diagram of the cleaning device and the oil removal and water backflow device of the integrated cooking appliance according to an embodiment of the present invention (initial state);

[0039] Figure 7 Schematic diagram of the pipeline principle of the integrated cooking appliance according to an embodiment of the present invention;

[0040] Figure 8Schematic diagram of the cleaning device and oil removal and backwater prevention device of the integrated cooking appliance according to an embodiment of the present invention (heavy pollution on the left side, first rotation of the upper and lower flaps);

[0041] Figure 9 Schematic diagram of the cleaning device and oil removal and backwater prevention device of the integrated cooking appliance according to an embodiment of the present invention (heavy pollution on the left side, second rotation of the upper and lower flaps);

[0042] Figure 10 Schematic diagram of the cleaning device and oil removal and backwater prevention device of the integrated cooking appliance according to an embodiment of the present invention (heavy pollution on the right side, first rotation of the upper and lower flaps);

[0043] Figure 11 Schematic diagram of the cleaning device and oil removal and backwater prevention device of the integrated cooking appliance according to an embodiment of the present invention (heavy pollution on the right side, second rotation of the upper and lower flaps);

[0044] Figure 12 Flowchart of the control method of the integrated cooking appliance according to an embodiment of the present invention. Detailed implementation manners

[0045] The embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions.

[0046] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These are 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 by the present invention can be arranged in different directions, these terms indicating directions should only be regarded as illustrative and not as limiting. For example, "upper" and "lower" are not necessarily limited to the directions opposite to or consistent with the direction of gravity. In addition, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0047] See Figure 1 and Figure 2, An integrated cooking appliance, comprising a range hood 1 and a stove body 2. Among them, 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 (not shown) is configured to be disposed within the fan frame 12, and an air inlet 111 is formed on the air inlet assembly 11. An inner cavity that is fluidly connected is formed inside the air inlet assembly 11 and the fan frame 12. A fan system 13 is disposed within the fan frame 12.

[0048] The stove body 2 is disposed below the air inlet assembly 11 and includes a cabinet body 21 and a cooking appliance 22 disposed on the top of the cabinet body 21. The cooking appliance 22 includes a stove top panel 221, stove burners 222 disposed on the stove top panel 221, and a rotary switch 223. There are two stove burners 222 arranged at intervals left and right, and the switch 223 is used to control the operation of the stove burners 222. A heat concentrator 224 is disposed on the outer periphery of each stove burner 222 to reflect the heat generated by the stove burner 222 and improve the heating efficiency.

[0049] See Figures 3 to 7 , The integrated cooking appliance of the present invention further includes a cleaning device and an oil removal and backwater prevention device. The cleaning device includes a water tank 31 disposed within the air inlet assembly 11. A partition 32 is disposed within the water tank 31, thereby dividing the space within the water tank 31 into a first chamber 311 located at the front side and a second chamber 312 located at the rear side. The cleaning device further includes a first water inlet pipe 331, a second water inlet pipe 332, a first water inlet valve 341, and a second water inlet valve 342. Among them, the first water inlet pipe 331 extends outside the cabinet body 21 to facilitate connection to a water supply pipe. The other end of the first water inlet pipe 331 extends to the bottom of the first chamber 311 and is in fluid communication with the inside of the first chamber 311. A first water inlet valve 341 is disposed on the first water inlet pipe 331 to enable communication or disconnection between the first water inlet pipe 331 and the first chamber 311. A circulation pump 345 may be disposed between the first water inlet valve 341 and the first chamber 311 to pump the water in the first water inlet pipe 311 into the first chamber 311. One end of the second water inlet pipe 332 is connected to the first water inlet pipe 331 and is in fluid communication inside the pipeline. The connection between the first water inlet pipe 331 and the second water inlet pipe 332 may be located upstream of the first water inlet valve 341. The other end of the second water inlet pipe 332 is connected to the input end of the second water inlet valve 342. A main solenoid valve may be disposed upstream of the connection between the first water inlet pipe 331 and the second water inlet pipe 332 to control the on-off of the tap water.

[0050] The cleaning device further includes a first water outlet valve 343, a first water outlet pipe 351, a second water outlet pipe 352, a first conduit 361, a second conduit 362, and a third conduit 363. The above two inlet valves and the first water outlet valve 343 are preferably solenoid valves. There are two first conduits 361 and two second conduits 362 respectively. Each group of the first conduit 361 and the second conduit 362 is used to correspond to a burner 222, a switch 223, and a heat concentrating ring 224 on one side. One end of each first conduit 361 is connected to the output end of the second inlet valve 342. After extending from the second inlet valve 342, it first spirally passes through the bottom of the burner 222, then extends below the switch 223 and is also in a spiral shape below the switch 223, and then extends to the heat concentrating ring 224. The heat concentrating ring 224 is in a hollow shape, and the first conduit 361 is in fluid communication with the inside of the heat concentrating ring 224. One end of the second conduit 362 is connected to the heat concentrating ring 224 and is in fluid communication with the inside of the heat concentrating ring 224. The other end of the second conduit 362 is connected to the input end of the first water outlet valve 343. The connection points of the first conduit 361 and the second conduit 362 with the heat concentrating ring 224 can be symmetrically arranged with respect to the bottom of the heat concentrating ring 224. Since the temperatures of the burner 222 and the switch 223 are relatively low, while the temperature inside the heat concentrating ring 224 is relatively high, the water coming from the second inlet pipe 342 finally passes through the heat concentrating ring 224 and then reaches the first water outlet valve 343. Thus, the tap water is heated by the waste heat of the cooking appliance 22 and its temperature is increased.

[0051] One end of the third conduit 363 is connected to the output end of the first water outlet valve 343, and the other end is connected to the bottom of the second chamber 312 and is in fluid communication with the inside of the second chamber 312. A valve 344 is provided on the partition 32. Preferably, the valve 344 is a solenoid valve, whereby the first chamber 311 and the second chamber 312 can be in fluid communication or closed.

[0052] One end of the first water outlet pipe 351 is connected to the bottom of the second chamber 312 and is in communication with the inside of the second chamber 312. The other end of the first water outlet pipe 351 extends into the inside of the range hood 1, such as inside the fan frame 12. It serves as a supply pipe for cleaning media (including water, steam, cleaning agents, etc.) and can be combined with common cleaning mechanisms such as nozzles to clean the fan system 13. One end of the second water outlet pipe 352 is connected to the bottom of the second chamber 312 and is in communication with the inside of the second chamber 312. The other end of the second water outlet pipe 352 extends to the front side of the water tank 31 in the air inlet assembly 11. Since this is the air inlet flow path Q through which the oil fume passes, the water discharged from the second water outlet pipe 352 can clean the air inlet flow path Q. A second water outlet valve 346 can be provided on the first water outlet pipe 351 and the second water outlet pipe 352 (it can be provided separately, or two water outlet pipes can be connected and provided at the connection point) to control the connection and disconnection of the pipeline.

[0053] The cleaning device further includes a spray pipe 371 disposed in the incoming air flow channel Q and a nozzle 372 disposed on the spray pipe 371. The spray pipe 371 is connected to and in fluid communication with the second water outlet pipe 352. The nozzle 372 is in fluid communication with the spray pipe 371. Thus, the water in the spray pipe 371 can be sprayed into the flow channel to clean the incoming air flow channel Q. To make the cleaning more uniform, at least two nozzles 372 can be provided and arranged at intervals vertically.

[0054] Thus, when the user finishes cooking, tap water will enter the cooker 22 for heat exchange, and the heated water will enter the water tank 31. The front surface of the first chamber 311 is the incoming air flow channel Q. In this way, the valve 344 in the water tank 31 can be used to control the three modes of the first chamber 311, namely, entering hot water, entering cold water, and not entering water, to achieve oil removal, rapid condensation of large amounts of oil fume, and condensation of small amounts of oil fume. When the range hood 1 is operating, the oil fume will first enter the air inlet 11. Because it needs to turn, according to the Coanda effect, the oil fume will flow along the front side wall surface of the air inlet assembly 11. A smoke sensor can be provided to detect the oil fume concentration, and thus control the switching mode of the water path in the first chamber 311. If the oil fume concentration is in the range of small amounts of oil fume, then the circulation pump 345 and the valve 344 will not operate, and the condensation will be carried out solely by the normal temperature water in the front layer and the wall surface of the incoming water flow channel. If the oil fume concentration is relatively large, then the first water inlet valve 341 and the circulation pump 345 will be opened to carry out cold water circulation to condense the oil fume.

[0055] The oil removal and water reverse device is disposed in the incoming air flow channel Q and includes a flap fixing frame 41, an upper flap 42, a lower flap 43, a first driving mechanism 44, a second driving mechanism 45, and a guide post 46. The flap fixing frame 41 is longitudinally extended. The upper flap 42 is disposed above the lower flap 43, and the two form a flap assembly. One end of the upper flap 42 and one end of the lower flap 43 are connected to each other and their respective ends are also connected to the flap fixing frame 41. The connection point can be located in the middle of the upper and lower positions of the flap fixing frame 41, and the upper flap 42 and the lower flap 43 can be symmetrically arranged. In this embodiment, the flap fixing frame 41 is disposed on the left side in the incoming air flow channel Q, and the two flaps are located on the right side of the flap fixing frame 41. The first driving mechanism 44 is a rotational driving module for driving the upper flap 42 and the lower flap 43 to rotate respectively around the axis extending in the front and rear directions of the connection point. The first driving mechanism 44 is preferably a motor.

[0056] The second driving mechanism 45 is a linear driving module, and its output end is connected to the flap fixing frame 41, so as to drive the flap fixing frame 41 to move left and right. In this embodiment, the second driving mechanism 45 includes a motor 451, a lead screw 452 and a nut 453. The nut is used as the output end of the second driving mechanism 45 and is connected to the upper end of the flap fixing frame 41. The lead screw 452 extends in the left-right direction, and the output end of the motor 451 is directly or indirectly connected to the lead screw 452 to drive the lead screw 452 to rotate around its own axis. The nut 453 is sleeved on the outer periphery of the lead screw 452 and is threadedly connected to the lead screw 452. Thus, when the lead screw 452 rotates, the nut 453 can move left and right along the axis of the lead screw 452. Alternatively, the second driving mechanism 45 can also adopt other existing forms of linear driving modules, such as electric push rods, combinations of motor gears and racks, etc. The front sides of the upper flap 42 and the lower flap 43 are respectively in contact with the inner side of the front side wall surface of the air inlet assembly 11, and the rear sides of the upper flap 42 and the lower flap 43 are respectively in contact with the outer side of the front side wall surface of the water tank 31 to scrape off oil stains. The guide posts 46 are arranged parallel to the lead screw 452 at the bottom of the flap fixing frame 41, and the flap fixing frame 41 and the guide posts 46 are in sliding fit to guide the movement of the flap fixing frame 41.

[0057] When there is a lot of grease on the inner side of the front side wall surface of the air inlet assembly 11 or the outer side of the front side wall surface of the water tank 31, the upper flap 42 and the lower flap 43 can be driven to rotate to scrape the oil. During cleaning, in order to increase the cleaning area, the two flaps need to be rotated at an angle. In this way, the water sprayed from the nozzle 372 will be evenly distributed in the air inlet flow channel Q under the reflection of the two flaps, and the function of cleaning all directions with fewer nozzles 372 can be achieved.

[0058] See Figure 12 , which is a flowchart of the control method of the integrated cooking appliance of the present invention. Specifically, it includes the following steps:

[0059] 1) After starting, it is judged whether the air inlet flow channel Q needs to be cleaned. A plurality of ultrasonic sensors can be arranged at the upper end of the oil removal and water return mechanism to detect the thickness of the oil stains adhered in the air inlet flow channel Q. If the thickness of the oil stains reaches the preset threshold value, cleaning is required, and step 2) is entered; if not, this step is repeated;

[0060] 2) It is judged whether the water temperature in the second chamber 312 has reached the temperature at which the oil stains can be cleaned, generally the melting temperature of the oil stains is 40 - 50 °C. If the temperature has not reached, step 3) is entered; if the temperature has reached, step 4) is entered;

[0061] 3) Detect the temperature of the water in the cooking appliance 22. If the temperature of the cooking appliance 22 reaches the preset threshold value, the first water inlet valve 341, the second water inlet valve 342, and the second water outlet valve 346 are opened. At this time, the circulation pump 345 works to transfer the heat of the temperature in the cooking appliance 22 to the second chamber 312 of the water tank 31, and then enter step 4). If the temperature of the cooking appliance 22 does not reach the preset threshold value, wait until the next cooking ends and then detect again.

[0062] 4) The nozzle 372 in the air inlet channel Q starts to spray water, and the upper flap 42 and the lower flap 43 cooperate with the nozzle 372 to rotate to expand the sprinkling area and moisten the periphery of the air inlet channel Q. At the same time, the valve 344 in the water tank 31 is opened, and the hot water in the second chamber 312 enters the first chamber 311 to heat the front side wall surface of the water tank 31, melt the grease, and reduce the viscosity. This process can last for 3 - 5 minutes, and then enter step 5).

[0063] 5) Due to different cooking habits of users, it may occur that the oil pollution on one side in the air inlet channel Q is heavier and the oil pollution on the other side is lighter. If the same cleaning method is used, it will inevitably take a long time and consume a lot of water. Therefore, it is necessary to detect the pollution conditions on both the left and right sides and perform corresponding control according to the detection results. The detection can be completed by the above ultrasonic sensor:

[0064] 5.1) If the pollution on the left side is heavier, then when the flap fixing frame 41 is in the 0 - A section, every time the upper flap 42 and the lower flap 43 rotate 90°, the flap fixing frame 41 moves horizontally by △L. For example, from the initial position shown in Figure 6 to the position shown in Figure 8 , the upper flap 42 and the lower flap 43 rotate 90°, and the flap fixing frame 41 moves to the right by △L; in the A - B section, every time the upper flap 42 and the lower flap 43 rotate 90°, the flap fixing frame 41 moves horizontally by 2△L. For example, from the position shown in Figure 8 to the position shown in Figure 9 , the upper flap 42 and the lower flap 43 rotate 90°, and the flap fixing frame 41 moves to the right by 2△L; A and B are the distances between the flap fixing frame 41 and the initial position on the left side respectively, and B > A. The above two parameters can be preset in advance; 0 is the initial position where the flap fixing plate 41 is far from the nozzle 372, and △L is the moving distance.

[0065] 5.2) If the pollution on the right side is heavier, then when the flap fixing frame 41 is in the A - B section, every time the upper flap 42 and the lower flap 43 rotate 90°, the flap fixing frame 41 moves horizontally by △L; when the flap fixing frame 41 is in the 0 - A section, every time the upper flap 42 and the lower flap 43 rotate 90°, the flap fixing frame 41 moves horizontally (to the right) by 2△L; from the initial state shown in Figure 6 to Figure 9As shown, the upper flap 42 and the lower flap 43 are rotated by 90°, and the flap fixing bracket 41 is moved 2△L to the right. From Figure 9 shown in Figure 10 shown to

[0066] shown, the upper flap 42 and the lower flap 43 are rotated by 90°, and the flap fixing bracket 41 is moved 2△L to the right, with a total movement of 4△L;

[0067] 5.3) If the pollution conditions on the left and right are equivalent, within the 0 - B section of the flap fixing bracket 41, every time the upper flap 42 and the lower flap 43 are rotated by 90°, the flap fixing bracket 41 moves horizontally by △L;

[0068] 6) After a rough wash, the ultrasonic sensor is activated to detect the cleanliness of the surface of the intake air flow channel Q, and the position coordinates of the contaminated areas are recorded in the system;

[0069] As used in the present invention, "fluid communication" refers to the spatial positional relationship between two components or parts (hereinafter uniformly referred to as the first part and the second part respectively), that is, a fluid (gas, liquid, or a mixture of both) can flow along a flow path from the first part and / or be transported to the second part. It can be that the first part and the second part are directly connected, or the first part and the second part are indirectly connected through at least one third party. The third party can be a fluid channel such as a pipe, a passage, a conduit, a flow guide, a hole, a groove, etc., or a chamber allowing the fluid to flow through, or a combination of the above.

Claims

1. An integrated cooking appliance, comprising a range hood (1), a cooking range body (2) and a cleaning device, wherein the range hood (1) comprises an air inlet assembly (11) at least partially located above the cooking range body (2), an air inlet (111) is formed in the air inlet assembly (11), and an air inlet flow channel (Q) is formed in the air inlet assembly (11), and is characterized in that: The cleaning device includes a water tank (31) disposed within the air inlet assembly (11). The water tank (31) has a wall surface in contact with the air inlet flow passage (Q), and the water tank (31) is capable of being in fluid communication with a cold water source; A partition (32) is disposed within the water tank (31). The partition (32) divides the space within the water tank (31) into a first chamber (311) close to the air inlet flow passage (Q) and a second chamber (312) far from the air inlet flow passage (Q). The first chamber (311) is capable of being in fluid communication with a cold water source, and the second chamber (312) is capable of being in fluid communication with a hot water source for cleaning the range hood (1). A valve (344) is disposed on the partition (32) to enable or cut off the communication between the first chamber (311) and the second chamber (312); The cleaning device further includes a spray pipe (371) disposed within the air inlet flow passage (Q) and nozzles (372) disposed on the spray pipe (371). The spray pipe (371) is used for inputting a cleaning medium, and the nozzles (372) are in fluid communication with the spray pipe (371) to clean the air inlet flow passage (Q); An oil removal and water return device is disposed within the air inlet flow passage (Q). The oil removal and water return device includes a flap fixing frame (41) and a flap assembly capable of rotating within the air inlet flow passage (Q). The flap fixing frame (41) and the nozzles (372) are respectively disposed on the left and right sides within the air inlet flow passage (Q). The flap fixing frame (41) is capable of moving in the left-right direction. The flap assembly includes an upper flap (42) and a lower flap (43). Both the upper flap (42) and the lower flap (43) are rotatably connected to the flap fixing frame (41) and can rotate about an axis extending in the front-rear direction. One side of the flap assembly is in contact with the inner side of the front side wall surface of the air inlet assembly (11), and the other side of the flap assembly is in contact with the outer side of the wall surface of the water tank (31) facing the air inlet flow passage (Q), thereby scraping off the oil stains on the outer peripheral wall surface of the air inlet assembly (11) within the air inlet flow passage (Q) and the cleaning medium sprayed by the nozzles (372) reflected into the air inlet flow passage (Q).

2. The integrated cooking appliance according to claim 1, wherein: The first chamber (311) is connected to a water supply pipe through a first water inlet pipe (331). A first water inlet valve (341) is disposed on the first water inlet pipe (331) to enable or cut off the communication between the first water inlet pipe (331) and the first chamber (311).

3. The integrated cooking appliance according to claim 1, wherein: The stove body (2) includes a cooking appliance (22). The cleaning device further includes a water inlet pipeline that passes through the cooking appliance (22) for heat exchange and is connected to the second chamber (312).

4. The integrated cooking appliance according to claim 3, wherein: The cooking appliance (22) includes a stove top panel (221), a burner head (222) disposed on the stove top panel (221), and a switch (223). A heat collecting ring (224) is disposed on the outer periphery of the burner head (222). The water inlet pipeline includes a second water inlet pipe (332) connected to an external water supply pipe and a first conduit (361) and a second conduit (362) that pass under the burner head (222), the switch (223), and the heat collecting ring (224) for heat exchange.

5. The integrated cooking appliance according to claim 4, wherein; The water inlet pipeline further includes a second water inlet valve (342), a first water outlet valve (343), a first water outlet pipe (351) and a third conduit (363). The second water inlet pipe (332) is connected to the input end of the second water inlet valve (342); one end of the first conduit (361) is connected to the output end of the second water inlet valve (342), and the first conduit (361) extends to the energy-gathering ring (224) after passing under the cooking hob (222) and the switch (223) in sequence. One end of the second conduit (362) is connected to the energy-gathering ring (224), and the other end of the second conduit (362) is connected to the input end of the first water outlet valve (343). The energy-gathering ring (224) is in a hollow shape, and the first conduit (361) and the second conduit (352) are respectively in fluid communication with the interior of the energy-gathering ring (224); the output end of the first water outlet valve (343) is connected to the second chamber (312) as a hot water source through the third conduit (353).

6. The integrated cooking appliance according to claim 5, characterized in that: The range hood (1) includes a fan system (13). The cleaning device further includes a first water outlet pipe (351). One end of the first water outlet pipe (351) is connected to the second chamber (312) and is in fluid communication with the interior of the second chamber (312), and the other end of the first water outlet pipe (351) extends to the fan system (13) of the range hood (1).

7. The integrated cooking appliance according to claim 5, wherein: The cleaning device further includes a second water outlet pipe (352). One end of the second water outlet pipe (352) is connected to the second chamber (312) and is in fluid communication with the interior of the second chamber (312), and the other end of the second water outlet pipe (352) extends into the air inlet channel (Q). The spray pipe (371) is connected to and in fluid communication with the second water outlet pipe (352), and the nozzle (372) is in fluid communication with the spray pipe (371) to clean the air inlet channel (Q).

8. A control method for an integrated cooking appliance as claimed in claim 1, characterized in that: It includes the following steps: 1) After starting, determine whether the air inlet channel (Q) needs to be cleaned. If so, go to step 2); if not, repeat this step; 2) Determine whether the water temperature in the second chamber (312) has reached the temperature at which oil stains can be cleaned. If not, go to step 3); if so, go to step 4); 3) Detect the water temperature in the cooking appliance (22). If the temperature of the cooking appliance (22) reaches the preset threshold, transfer the temperature in the cooking appliance (22) to the second chamber (312) of the water tank (31), and go to step 4); if the temperature of the cooking appliance (22) does not reach the preset threshold, wait until the next cooking ends and then detect again; 4) The nozzle (372) in the air inlet channel (Q) starts to spray water, and the upper flap (42) and the lower flap (43) rotate in cooperation with the nozzle (372); meanwhile, the hot water in the second chamber (312) enters the first chamber (311) to heat the wall surface of the water tank (31) in contact with the air inlet channel (Q), and then go to step 5); 5) Detect the pollution conditions on the left and right sides in the air inlet flow channel (Q), and perform control according to the detection results, so that the flap fixing frame (41) moves towards the nozzle (372), and the upper flap (42) and the lower flap (43) rotate; 6) After a rough cleaning, detect and record the cleanliness of the surface of the air inlet flow channel (Q); 7) Control the flap fixing frame (41) to continue moving, and cooperate with the rotation of the upper flap (42) and the lower flap (43) to perform precise cleaning. After the cleaning is completed, the upper flap (42) and the lower flap (43) return to their original positions.

9. The control method of the integrated cooking appliance according to claim 8, wherein: In step 5), perform corresponding control according to different pollution conditions: 5.1) If the pollution on the left side is relatively heavy, control the flap fixing frame (41) within the range of 0-A. Every time the upper flap (42) and the lower flap (43) rotate 90°, the flap fixing frame (41) horizontally moves △L towards the nozzle (372); control the flap fixing frame (41) within the range of A-B. Every time the upper flap (42) and the lower flap (43) rotate 90°, the flap fixing frame (41) horizontally moves 2△L towards the nozzle (372); A and B are respectively the distances between the flap fixing frame (41) and the initial position far from the nozzle (372), and B > A, 0 is the initial position of the flap fixing frame (41); 5.2) If the pollution on the right side is relatively heavy, control the flap fixing frame (41) within the range of A-B. Every time the upper flap (42) and the lower flap (43) rotate 90°, the flap fixing frame (41) horizontally moves △L towards the nozzle (372); control the flap fixing frame (41) within the range of 0-A. Every time the upper flap (42) and the lower flap (43) rotate 90°, the flap fixing frame (41) horizontally moves 2△L towards the nozzle (372); 5.3) If the pollution conditions on the left and right are equivalent, control the flap fixing frame (41) within the range of 0-B. Every time the upper flap (42) and the lower flap (43) rotate 90°, the flap fixing frame (41) horizontally moves △L towards the nozzle (372).

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