A range hood and a control method thereof

Abstract

The application discloses an extractor hood and a control method thereof. The extractor hood comprises a first box body and a second box body, an air inlet is formed in the front side of the first box body, and a fan is arranged in the second box body. The extractor hood further comprises a refrigeration device which is arranged outside the first box body and the fan frame, and the refrigeration device comprises a compressor, a condenser and an evaporator. The extractor hood further comprises a third box body which is arranged in front of the first box body. The condenser is arranged in the third box body, and the refrigeration device further comprises a first air supplement opening which is arranged at the bottom of the third box body and a second air supplement opening which is arranged at the side of the third box body, and the second air supplement opening is higher than the first air supplement opening. The third box body and the refrigeration device can at least be in the following states: only exhaust fume state, the air inlet is opened, and the first air supplement opening and the second air supplement opening are closed; only condenser heat dissipation state, the air inlet is closed, the first air supplement opening is opened, and the second air supplement opening is closed; exhaust fume and condenser heat dissipation state, the air inlet is opened, the first air supplement opening is closed, and the second air supplement opening is opened.

Description

TECHNICAL FIELD

[0001] The present application relates to an oil fume purification device, in particular to an extractor hood and a control method of the extractor hood. BACKGROUND

[0002] The kitchen is the main place for people to cook, and the air environment of the kitchen directly affects the cooking experience. The kitchen is hot in summer and cold in winter, and there is a demand for cooling and heating. In order to provide cool wind for the kitchen in summer and warm wind in winter, people have invented various air conditioner type extractor hoods, that is, integrating the air conditioner assembly with the extractor hood, and opening an air conditioner air outlet on the shell of the extractor hood. The air conditioner hood can work in multiple different modes. As long as the mode with the air conditioner is turned on, the air conditioner air outlet will blow out cold or hot air, which can be directly blown to the cook or blown to the indoor kitchen, thereby effectively improving the cooking experience of the cook.

[0003] At present, the condenser of the refrigeration system is usually cooled in two ways. One way is to use an independent fan to cool the condenser. This way is divided into two types: one is to use a public chimney. This exhaust cooling requires a large pressure to be discharged into the public chimney, which requires a large independent fan, resulting in high cost and heavy weight of the whole machine. The other way is to exhaust and cool separately, which will cause installation inconvenience, and users also do not want to drill holes in the walls of the room.

[0004] Another way is to use the fan of the extractor hood to cool the condenser, such as a kind of refrigeration extractor hood equipment disclosed in Chinese patent application No. 201920460790.X, which comprises an extractor hood system, a refrigeration system and a shell. The inside of the shell forms a cavity, and the extractor hood system and the refrigeration system are installed in the cavity. The refrigeration system has a cold air passage and an exhaust passage, the extractor hood system is provided with a smoke exhaust passage, the refrigeration system is connected with an air outlet device, and the cold air passage is communicated with the air outlet device. This kind of refrigeration extractor hood, the condenser is arranged in the oil fume passage, and the oil fume flow is used to cool the condenser. After a long time, the condenser is easy to be dirty, which reduces the cooling efficiency of the condenser. SUMMARY

[0005] The first technical problem to be solved by the present application is to provide an extractor hood for the above-mentioned deficiencies in the prior art, which uses the fan of the extractor hood itself to cool the refrigeration device, without the need for additional fans, and also avoids oil fume pollution of the condenser.

[0006] The second technical problem to be solved by the present application is to provide a control method for the above-mentioned extractor hood.

[0007] The application solves the first technical problem by adopting the technical scheme of a range hood, comprising a first box body and a second box body arranged above the first box body, a first air inlet is arranged on the front side of the first box body, a fan frame in fluid communication with the first box body is arranged in the second box body, and a fan is arranged in the fan frame.

[0008] The range hood further comprises a refrigeration device arranged outside the first box body and the fan frame, the refrigeration device comprises a compressor, a condenser and an evaporator, and is characterized in that:

[0009] The range hood further comprises a third box body arranged in front of the first box body, the condenser is arranged in the third box body, and the third box body comprises a valve enabling the third box body and the fan frame to be in communication when the condenser dissipates heat;

[0010] The refrigeration device further comprises a first air supplementing opening arranged at the bottom of the third box body and a second air supplementing opening arranged at the side of the third box body, the second air supplementing opening is higher than the first air supplementing opening;

[0011] The third box body and the refrigeration device can at least be in the following states:

[0012] Only the oil fume exhaust state, the first air inlet is open, and the first air supplementing opening and the second air supplementing opening are closed;

[0013] Only the condenser heat dissipation state, the first air inlet is closed, the first air supplementing opening is open, and the second air supplementing opening is closed;

[0014] The oil fume exhaust and condenser heat dissipation state, the first air inlet is open, the first air supplementing opening is closed, and the second air supplementing opening is open.

[0015] The fan of the range hood is used for dissipating heat of the condenser of the refrigeration device, and an additional heat dissipation fan is not needed, and the oil fume does not flow through the condenser to pollute the condenser and cause the refrigeration efficiency to decrease; in the steaming and cooking environment, air can directly flow through the exhaust passage of the condenser, which can realize exhaust and condenser heat dissipation under small air volume and sterilize the inside of the condenser and remove part of the dust by using steam; even in the case of needing to exhaust and dissipate heat, since the first air supplementing opening closest to the first air inlet is closed and the open second air supplementing opening is much higher than the first air inlet, the oil fume will be sucked into the third box body through the first air inlet, so the oil fume will not enter the third box body through the second air supplementing opening to pollute the condenser.

[0016] Preferably, to realize opening and closing of the first air supplementing opening, the refrigeration device comprises an air supplementing assembly arranged at the bottom of the third box body, the first air supplementing opening is formed on the air supplementing assembly, and part of the air supplementing assembly forming the first air supplementing opening can move up and down to realize opening and closing of the first air supplementing opening.

[0017] Further, the air supplement assembly comprises a first frame, a first baffle and a cover plate, the first frame is annular and fixed at the bottom of the third cabinet, the top of the first frame is open, the cover plate is movably matched with the first frame, and the first baffle is arranged below the cover plate in a spaced manner, so that the gap between the first baffle and the cover plate constitutes a first air supplement opening;

[0018] When the first air supplement opening is at least partially exposed below the first frame, the first air supplement opening is opened and in fluid communication with the third cabinet through the annular interior of the first frame; when the first air supplement opening is located in the first frame, the first air supplement opening is closed, so that the opening and closing of the first air supplement opening can be conveniently realized.

[0019] Further, in order to facilitate the driving of the air supplement assembly, the range hood further comprises a movement mechanism, the movement mechanism comprises a driving mechanism, a second baffle driven by the driving mechanism to move up and down, and a fork arranged at the bottom of the second baffle, the fork extends downward from the bottom of the second baffle and can press the cover plate downward, and the cover plate and the first baffle have a tendency to move upward.

[0020] Further, in order to facilitate the resetting of the air supplement assembly when the movement mechanism is reset, the air supplement assembly further comprises a guide column and an elastic member, the guide column extends downward from the bottom surface of the cover plate, the elastic member is sleeved on the outer periphery of the guide column, the upper end of the elastic member abuts against the bottom surface of the cover plate, and the lower end of the elastic member abuts against the bottom surface of the first frame, so that the elastic member makes the cover plate and the first baffle have a tendency to move upward and reset.

[0021] Further, in order to facilitate the opening and closing of the second air supplement opening, a third air supplement opening adapted to the second air supplement opening is formed on the second baffle, when the third air supplement opening is at least partially aligned with the second air supplement opening, the second air supplement opening is opened, and when the third air supplement opening is completely misaligned with the second air supplement opening, the second air supplement opening is closed by the part of the second baffle other than the third air supplement opening, through the linkage of the two air supplement openings, one driving mechanism can realize mode switching under multiple working conditions, and the movement mechanism is not in the oil fume environment, so that the movement mechanism is more reliable, and the cost of oil-proofing of the movement mechanism is saved.

[0022] Further, in order to facilitate the opening and closing of the air inlet, a smoke baffle capable of reversibly opening and closing the air inlet is arranged at the air inlet.

[0023] Further, the movement mechanism further comprises a connecting rod, one end of the connecting rod is rotatably connected to the second baffle, the other end of the connecting rod is rotatably connected to the smoke baffle after penetrating through the first frame of the air supplementing assembly, the existing smoke baffle driving mechanism is arranged in the oil fume flow channel, oil fume can pass through the position of the rotating part and adhere to the position of the rotating part after a long time, causing the smoke baffle to be inconvenient to open, and the movement mechanism of the smoke baffle in the present application is not in the oil fume environment, so that the movement mechanism is more reliable, and the cost of preventing oil of the movement mechanism is saved.

[0024] Further, in order to avoid oil fume entering the third box through the position of the connecting rod penetrating through the air supplementing assembly, a sealing strip is arranged at the position of the first frame through which the connecting rod penetrates.

[0025] Further, the refrigeration device further comprises a flow distribution plate, the flow distribution plate is arranged at a position corresponding to the second air supplementing opening and is rotatably connected to the third box, when the first air supplementing opening is opened, the flow distribution plate is in a vertical state, and when the second air supplementing opening is opened, the flow distribution plate is in a horizontal state, so that the flow distribution plate does not affect the uniform air supplementing when the first air supplementing opening is opened, and the flow distribution plate can distribute the flow of the supplemented air when the second air supplementing opening is opened.

[0026] Further, the second baffle is provided with a rack, and the flow distribution plate is provided with a gear engaged with the rack, so that the flow distribution plate and the opening and closing of the two air supplementing openings are linked.

[0027] Further, in order to facilitate opening and closing of the second air supplementing opening, a second baffle capable of moving up and down is arranged in the third box, the second baffle is provided with a third air supplementing opening matched with the second air supplementing opening, when the third air supplementing opening is at least partially aligned with the second air supplementing opening, the second air supplementing opening is opened, and when the third air supplementing opening is completely misaligned with the second air supplementing opening, the second air supplementing opening is closed by the part of the second baffle other than the third air supplementing opening.

[0028] Further, the refrigeration device further comprises a flow distribution plate, the flow distribution plate is arranged at a position corresponding to the second air supplementing opening and is rotatably connected to the third box, the flow distribution plate is provided with through holes, the through holes on the left and right sides have the smallest area, and the through hole in the middle has the largest area; when the first air supplementing opening is opened, the flow distribution plate is in a vertical state, and when the second air supplementing opening is opened, the flow distribution plate is in a horizontal state. Since the air supplemented by the second air supplementing opening passes through the flow distribution plate from the left and right sides, the flow distribution plate has a large flow area in the middle and a small flow area on the left and right sides, so that the cold air is uniformly distributed on the condenser, the heat dissipation efficiency of the condenser is improved, and the refrigeration efficiency of the refrigeration device is improved.

[0029] Further, a guide plate is arranged at the rear side of the first or second cabinet opposite to the valve, the guide plate is in an arc shape protruding forward, and the guide plate can accelerate the oil fume at the lower end, increase the negative pressure, and promote the flow of the heat dissipation air flow.

[0030] Further, the bottom of the fan frame extends to the bottom of the second cabinet, and the bottom of the fan frame is matched with the top of the first cabinet, so that the oil fume is prevented from leaking to the space outside the fan frame in the second cabinet and polluting the refrigeration device.

[0031] Further, in order to quickly guide the oil fume into the fan, the fan frame comprises an upper fan frame and a lower fan frame, and the lower fan frame is in a state of gradually inclining from the left and right sides to the middle from bottom to top.

[0032] Preferably, the compressor and the evaporator are arranged in the second cabinet, the front side of the second cabinet is provided with a cold air outlet for blowing the cold air after heat exchange with the evaporator, and the top of the second cabinet is provided with an air inlet for air supply of the evaporator.

[0033] The technical scheme adopted by the present application to solve the second technical problem is a control method of the extractor hood, and the control method comprises the following steps.

[0034] 1) Start, judge whether the refrigeration device needs to be started, if yes, start the refrigeration device, and enter step 2), if not, do not start the refrigeration device, then the air inlet is normally opened when the extractor hood works, the air inlet is closed when the extractor hood does not work, and then the process is ended;

[0035] 2) Detect the real-time temperature T of the condenser, judge whether heat dissipation is needed, when T>Tz, it is judged that heat dissipation is needed at this time, then judge whether it is in a cooking state, if yes, enter step 3), if not, enter step 4); wherein Tz is the normal working temperature of the condenser preset;

[0036] 3) Perform corresponding operation according to the detected real-time oil fume concentration C;

[0037] 3.1) If C≤C1 is met, C1 is a first preset oil fume threshold value, the air inlet is closed, the first air supply inlet is opened, the second air supply inlet is closed, and the condenser is in a heat dissipation state;

[0038] 3.2) If C>C1 is met, the air inlet is opened, the first air supply inlet is closed, the second air supply inlet is opened, and the oil fume is discharged and the condenser is in a heat dissipation state;

[0039] 4) Start the extractor hood, the air inlet is closed, and the first air supply inlet is opened, and the condenser is in a heat dissipation state.

[0040] Further, the air inlet is provided with a smoke baffle capable of reversibly opening and closing the air inlet; if C1 Z , the opening angle of the smoke baffle ranges from θ D , and θ D is not less than θ Z .Thus, higher refrigeration efficiency is achieved with lower fan energy consumption while ensuring the oil fume suction effect.

[0041] Preferably, the value range of θ Z is 15-45°, and the value range of θ D is 45-80°.

[0042] Preferably, if C1 Z , the rotating speed of the fan is n D , and n D is not less than n Z .

[0043] Compared with the prior art, the advantages of the present application are as follows: the fan of the range hood is used to dissipate heat for the condenser of the refrigeration device, and no additional heat dissipation fan is needed; the oil fume does not flow through the condenser, so that the condenser is not polluted and the refrigeration efficiency is not reduced; in the steaming cooking environment, air can directly flow through the exhaust passage of the condenser, which can realize exhaust and condenser heat dissipation under small air volume, and can use steam to sterilize the inside of the condenser and remove part of the dust; even in the case of both exhaust and heat dissipation, since the first air supplement opening closest to the air inlet is closed and the opened second air supplement opening is much higher than the air inlet, the oil fume will be sucked into the air inlet at a lower position in the instant of generation, so the oil fume will not enter the third box through the second air supplement opening to pollute the condenser; by arranging the flow distribution plate, when the first air supplement opening is opened, the flow distribution plate is in a vertical state, and when the second air supplement opening is opened, the flow distribution plate is in a horizontal state, so that when the first air supplement opening is opened, the flow distribution plate does not affect the uniform air supplement, and when the second air supplement opening is opened, the flow distribution plate can distribute the flow of the supplemented air. BRIEF DESCRIPTION OF DRAWINGS

[0044] Figure 1 is a schematic view of the range hood of the embodiment of the present application;

[0045] Figure 2 is a schematic view of the range hood of the embodiment of the present application; Figure 1

[0046] Figure 3 for Figure 1 A schematic diagram showing the concealed front wall of the second housing and the evaporator in a range hood;

[0047] Figure 4 for Figure 1 A sectional view;

[0048] Figure 5 This is a schematic diagram of the condenser of the range hood according to an embodiment of the present invention;

[0049] Figure 6 This is a schematic diagram of the air supply component of a range hood according to an embodiment of the present invention;

[0050] Figure 7 This is an exploded structural diagram of the air supply component of the range hood according to an embodiment of the present invention;

[0051] Figure 8 This is a cross-sectional view of the air supply component of the range hood according to an embodiment of the present invention;

[0052] Figure 9 This is a schematic diagram of the air supply component, smoke baffle, and their movement mechanism of a range hood according to an embodiment of the present invention;

[0053] Figure 10 This is a schematic diagram of the motion mechanism of a range hood according to an embodiment of the present invention;

[0054] Figure 11 This is a schematic diagram of a range hood according to an embodiment of the present invention (in a smoke-free state);

[0055] Figure 12 for Figure 11 A schematic diagram of the front side wall of the concealed part of a range hood;

[0056] Figure 13 for Figure 11 A schematic diagram of the air supply component, smoke baffle and its movement mechanism of a range hood;

[0057] Figure 14 This is a schematic diagram of a range hood according to an embodiment of the present invention (in the state of oil fume).

[0058] Figure 15 for Figure 14 A schematic diagram of the air supply component, smoke baffle and its movement mechanism of a range hood;

[0059] Figure 16 This is a schematic diagram of a range hood according to an embodiment of the present invention (in a state of heavy oil smoke);

[0060] Figure 17 for Figure 16 A schematic diagram of the air supply component, smoke baffle and its movement mechanism of a range hood;

[0061] Figure 18 Control flow chart of the range hood according to an embodiment of the present application. DETAILED DESCRIPTION

[0062] Embodiments of the present application are described in detail below with reference to the attached drawings, wherein the same or similar components have the same or similar designations and functions. The embodiments of the present application described herein are exemplary and explanatory in all aspects. Therefore, the scope of the present application is not limited to the embodiments described herein, but covers all modifications and changes derived from or equivalent to the embodiments described herein without departing from the spirit of the present application.

[0063] In the description of the present application, it needs to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, since the disclosed embodiments of the present application can be disposed in different directions, so these orientation-indicating terms are only illustrative and should not be regarded as limiting, such as "upper", "lower" are not necessarily limited to the direction opposite or consistent with the direction of gravity. In addition, the features defined as "first", "second" can explicitly or implicitly include one or more of the features.

[0064] Referring to Figures 1-10 A range hood includes a first cabinet 1, a second cabinet 2 disposed above the first cabinet 1, and a third cabinet 3 disposed in front of the first cabinet 1. The three cabinets can be a one-piece structure or a split structure.

[0065] The first cabinet 1 has an air inlet 11 formed on the front side thereof for sucking in oil fumes, and a smoke baffle 12 is disposed at the air inlet 11 to open and close the air inlet 11 in a flip-up manner. A fan frame 21 is disposed in the second cabinet 2, and a fan 22 is disposed in the fan frame 21. The bottom of the fan frame 21 extends to the bottom of the second cabinet 2 and is in fluid communication with the first cabinet 1, and the top of the fan frame 21 extends to the top of the second cabinet 2. The bottom of the fan frame 21 is adapted to the top of the first cabinet 1, so that the oil fumes from the first cabinet 1 can only enter the fan frame 21. The fan frame 21 includes a fan frame upper portion 211 and a fan frame lower portion 212. The fan frame upper portion 211 can be a cuboid, and the fan frame lower portion 212 can be gradually inclined from the left and right sides to the middle from bottom to top, thereby guiding the oil fume flow from the first cabinet 1 to quickly enter the fan frame upper portion 211.

[0066] The range hood further comprises a refrigeration device including a compressor 41, a condenser assembly 42 and an evaporator 43, a refrigerant circulation passage being formed between the compressor 41, the condenser assembly 42 and the evaporator 43 to perform refrigeration in the same manner as the prior art. The compressor 41 and the evaporator 43 can be arranged in the second box body 2 and located outside the fan frame 21. The front side of the second box body 2 is provided with a cold air outlet 23, and the evaporator 43 is arranged correspondingly to the cold air outlet 23. The top front side of the second box body 2 is provided with an air inlet 24 to supply air to the evaporator 43 for heat exchange.

[0067] The condenser assembly 42 is arranged in the third box body 3, so that the oil fume is isolated from the condenser assembly 42 and the condenser assembly 42 is cooled by the fan 22 of the range hood. For the prior art solution of cooling the condenser by the fan of the range hood, a valve plate is turned to one way of the condenser when the condenser needs to be cooled, and an electrostatic device is arranged at the air inlet of the condenser. However, this electrostatic treatment method can only solve a part of the problem of the condenser fin being contaminated by oil dirt in a short time. On the one hand, the electrostatic device cannot completely remove the oil dirt, and on the other hand, the fin of the electrostatic module will be contaminated by oil dirt after a few months, reducing the purification effect, and the cost of the electrostatic module is relatively high.

[0068] In the present application, the condenser assembly 42 is arranged in the third box body 3, and clean air or water vapor flows through the third box body 3. The bottom of the third box body 3 is open and provided with an air supply assembly 44 at the opening. The air supply assembly 44 includes a first frame 441, a guide column 442, a first baffle 443, an elastic member 444 and a sealing strip 445.

[0069] The first frame 441 is annular rectangular with an open top, fixed to the bottom of the third cabinet 3, and a cover plate 446 can be arranged inside the first frame 441. The cover plate 446 can be shaped to match the first frame 441, and the cover plate 446 is at least partially arranged in the first frame 441 and moves in cooperation with the first frame 441. The first baffle 443 can be arranged below the cover plate 446 by the connecting support 447, and the gap between the first baffle 443 and the cover plate 446 forms the first air supplement port 448. The guide column 442 can extend downward from the bottom surface of the cover plate 446, and the elastic member 444, which is preferably a spring, is sleeved on the outer periphery of the guide column 442. The upper end of the elastic member 444 abuts against the bottom surface of the cover plate 446, and the lower end of the elastic member 444 abuts against the bottom surface of the first frame 441. Thus, the elastic member 444 makes the cover plate 446 (together with the first baffle 443) have a tendency to return to the upward movement. In the closed state of the first air supplement port 448, i.e., the initial state, the bottom surface of the first baffle 443 is not lower than the bottom surface of the first frame 441. In the open state of the first air supplement port 448, the first baffle 443 is at least partially lower than the bottom surface of the first frame 441, so that the first air supplement port 448 is at least partially exposed to the bottom surface of the first frame 441. At this time, the air outside the range hood can pass through the first air supplement port 448, the middle of the first frame 441, and then enter the third cabinet 3.

[0070] The condenser assembly 42 includes a condenser 421, a mounting support 422, and a flow distribution plate 423. The condenser 421 is mounted in the third cabinet 3 by the mounting support 422, and the flow distribution plate 423 is arranged below the condenser 421 and is rotatably connected to the third cabinet 3 by a rotating shaft. The rotating axis of the flow distribution plate 423 extends in the left-right direction. The flow distribution plate 423 is provided with through holes 4231, and the through holes 4231 on the left and right sides have the smallest area, and the through hole 4231 in the middle has the largest area. When the first air supplement port 448 is open, the air inlet is uniform, so the flow distribution plate 423 is in a vertical state at this time, and does not affect the air inlet and heat dissipation of the condenser 421.

[0071] The second air supplementing port 31 is formed on the left and right side walls of the third box 3. The position of the flow distribution plate 423 can correspond to the second air supplementing port 31. When the flow distribution plate 423 is in the horizontal state, the second air supplementing port 31 is below the flow distribution plate 423, and the air supplementing air needs to pass through the flow distribution plate 423 to reach the condenser 421. The top of the third box 3 can partially extend into the fan frame 21 and / or the first box 1. The valve 32 is arranged on the part of the top of the third box 3 located in the fan frame 21 and / or the first box 1. The valve 32 is above the condenser 421 and can be rotatably opened and closed, so as to make the third box 3 and the fan frame 21 in fluid communication or disconnected. When the condenser 421 needs to dissipate heat, once the fan 22 is started, a negative pressure area is formed at the lower end position of the fan 22. When the first air supplementing port 448 or the second air supplementing port 31 is opened, the atmospheric pressure outside pushes the valve 32 away, so as to realize the heat dissipation of the condenser 421. The rear side of the first box 1 or the second box 2, which is opposite to the valve 32, can be provided with the flow guide plate 13 which is in the form of an arc protruding forward. The flow guide plate 13 can accelerate the oil fume at the lower end, increase the negative pressure, and promote the flow of the heat dissipation air flow. When the fan 22 stops, the valve 32 is in the closed state under the action of gravity, so as to prevent the oil fume from flowing backward.

[0072] In order to open and close the first air supplementing port 448 and the second air supplementing port 31, open and close the smoke baffle 12, and rotate the flow distribution plate 423, the range hood further comprises a movement mechanism for realizing the above state changes. The movement mechanism can have two, which are arranged on the left and right sides of the third box 3. Each movement mechanism comprises a driving mechanism 51, a second frame 52, a second baffle 53, a connecting rod 54 and a yoke 55. The second frame 52 is fixedly arranged in the third box 3. The second baffle 53 is movably arranged in the second frame 52. The driving mechanism 51 is arranged on the second frame 52, and the output end thereof is in transmission connection with the second baffle 53, so as to drive the second baffle 53 to move up and down. The driving mechanism 51 is a linear driving module. In the embodiment, an electric push rod is preferred. Alternatively, other existing linear driving modules can also be used, such as a motor screw nut pair, a motor worm and gear pair, etc. One end of the connecting rod 54 is rotatably connected to the second baffle 53, in particular, the bottom of the second baffle 53. The other end of the connecting rod 54 is rotatably connected to the side of the smoke baffle 12 after passing through the first frame 441 of the air supplementing assembly 44. Thus, the two connecting rods 54 can make the left and right sides of the smoke baffle 12 rotate synchronously. The position of the first frame 441 through which the connecting rod 54 passes is provided with the sealing strip 445, so as to avoid pressure leakage. The sealing strip 445 can prevent the oil fume from entering the third box 3 through the position of the first frame 441 through which the connecting rod 54 passes, so as to pollute the internal environment of the third box 3. Preferably, the sealing strip 445 is a toothed rubber strip.

[0073] The fork 55 is arranged at the bottom of the second baffle 53 and extends downward from the bottom of the second baffle 53 to cooperate with the cover plate 446 of the air supplement assembly 44. When the second baffle 53 is driven to move downward, the fork 55 contacts the cover plate 446 to push the cover plate 446 and the first baffle 443 downward, so that the first air supplement port 448 is exposed below the first frame 441 to realize the opening of the first air supplement port 448. At this time, the elastic member 444 is compressed, so that when the second baffle 53 is driven by the driving mechanism 51 to move upward, the cover plate 446 and the first baffle 443 are reset upward under the action of the elastic member 444 when the fork 55 no longer applies force to the cover plate 446, so that the first air supplement port 448 returns to the first frame 441 to realize the sealing of the first air supplement port 448.

[0074] The second baffle 53 is provided with a third air supplement port 531 matched with the second air supplement port 31, and a rack 56 is arranged on the second baffle 53. A gear 424 matched with the rack 56 is arranged on the rotating shaft of the flow distribution plate 423. During the upward and downward movement of the second baffle 53, the second baffle 53 and the gear 424 cooperate to drive the flow distribution plate 423 to rotate.

[0075] When the second baffle 53 is in the initial state, the third air supplement port 531 is at least partially aligned with the second air supplement port 31, so that the second air supplement port 31 is opened, and at this time, the first air supplement port 448 is in the closed state, and the smoke baffle 12 is opened. When the second baffle 53 is moved upward from this position by a certain distance, the third air supplement port 531 on the second baffle 53 is higher than the second air supplement port 31 on the third cabinet 3, so that the second air supplement port 31 is in the closed state. When the second baffle 53 is moved downward from the initial state by a certain distance, the first air supplement port 448 is opened, and the second air supplement port 31 is closed. In the above different states, when the second air supplement port 31 is completely misaligned with the third air supplement port 531, the second air supplement port 31 is closed by being blocked by the part of the second baffle 53 except the third air supplement port 531.

[0076] During the above process, when the first air supplement port 448 is closed and air supplement is supplemented from the second air supplement port 31, the flow distribution plate 423 is in a horizontal state. If the flow distribution plate 523 is not arranged, air supplement will be blown through the fins of the condenser 421 from the nearest positions on the left and right, and the air flow is small in the middle position. Therefore, the gear 424 is arranged to enable the flow distribution plate 423 to rotate to the horizontal position at this time, as shown in Figure 13 Due to the large flow area in the middle of the flow distribution plate 423 and the small flow area on the left and right, the cold air is evenly distributed on the condenser 421, the heat dissipation efficiency of the condenser 421 is improved, and the refrigeration efficiency of the refrigeration device is improved.

[0077] The oil extractor hood of the present application has a heat dissipation mode and an extractor hood working mode (in this mode, heat dissipation is not required).

[0078] When the range hood is in working mode, i.e. only need to exhaust fume, see Figure 2 and Figure 3 The driving mechanism 51 drives the second baffle 53 to move upward from the initial position, so that the third air inlet 531 on the second baffle 53 is higher than the second air inlet 31 on the third box 3, thus the second air inlet 31 and the first air inlet 448 are both in the closed state, and the linkage 54 drives the smoke baffle 12 to open to the maximum position, i.e. in the horizontal state, and the air inlet 11 is opened.

[0079] When the condenser 421 needs to be cooled, there are two cases, one is that no fume needs to be exhausted, and the other is that fume needs to be exhausted. When no fume needs to be exhausted, see Figures 11-13 The output end of the driving mechanism 51 moves downward, the second baffle 53 is driven downward, the smoke baffle 12 is closed under the drive of the linkage 54, and when the smoke baffle 12 completely closes the air inlet 11, the fork 55 will abut against the first baffle 443 of the air inlet assembly 44, and the first air inlet 448 around the first baffle 443 will be exposed downward below the first frame 441 under the compression of the elastic member 444, thus air inlet is realized. Because the smoke baffle 12 is closed and the first air inlet 448 is opened, the atmospheric pressure will push the valve 32 of the condenser 421 away under the negative pressure of the fan 22, so that the fan 22 will suck the air in the kitchen, and then realize the cooling of the condenser 421. At this time, the flow distribution plate 423 is in the vertical state, and does not affect the air inlet.

[0080] The second case is that both fume and cooling are needed, so the driving mechanism 51 drives the second baffle 53 to move and the smoke baffle 12 opens to different angles according to the size of the fume. See Figure 14 and Figure 15 For small fume, the smoke baffle 12 opens to a small angle, see Figure 16 and Figure 17 For large fume, the smoke baffle 12 opens to a large angle. In the above two states, the second air inlet 31 is opened (may be completely opened or partially opened), the first air inlet 448 is closed, and the flow distribution plate 423 is in the horizontal state.

[0081] In the above case of both fume and cooling, because the first air inlet 448 closest to the air inlet 11 is closed, and the opened second air inlet 31 is much higher than the air inlet 11, the fume will rise in the moment of generation and will be sucked into the air inlet 11 at the lower position, so the fume will not enter the third box 3 from the second air inlet 31.

[0082] In order to realize automatic control, the range hood further comprises an oil fume sensor arranged at left and right positions or upper and lower positions of the air inlet 11, and the temperature sensor of the condenser 421 is arranged on the fin of the condenser 421, and two or more. The above two sensors are not shown in the figure, and the structure and detection mode thereof can adopt the prior art.

[0083] Referring to Figure 18 , the control method of the range hood of the present application comprises the following steps:

[0084] 1) Start, judge whether the refrigeration device needs to be started at this time, if yes, start the refrigeration device, and enter step 2), if no, do not start the refrigeration device, then the smoke baffle 12 is normally opened horizontally when the range hood works, and the smoke baffle 12 is closed when the range hood does not work, and then the process ends; in this step, whether the refrigeration is needed can be judged according to the indoor environment temperature in the kitchen, such as starting when it is higher than about 28 degrees, or starting according to the current season, such as starting in summer;

[0085] 2) The temperature sensor attached to the condenser 421 records the temperature of the condenser 421, and judges whether the temperature at this time needs to be dissipated, the normal working temperature of the condenser 421 is Tz, and the real-time temperature is T; at the same time, the cooking state of the kitchen is judged, if yes, enter step 3); if no, enter step 4);

[0086] 3) According to the detected different real-time oil fume concentration C, corresponding operations are performed:

[0087] 3.1) If the real-time oil fume concentration C is less than or equal to C1, C1 is a first preset oil fume threshold, and is preferably 1.0 mg / m 3 , it can be determined that it is light cooking (no oil fume state), such as steaming food, at this time only water vapor is generated, at this time the system will start the range hood at a low speed according to the condenser 421 needing to dissipate heat, the driving mechanism 51 drives the second baffle 53 to move downward, the smoke baffle 12 is closed, and is in a condenser 421 heat dissipation state, air is taken in from the first air inlet 448 at the bottom of the third box 3, and at the same time the water vapor is taken in to cool the condenser 421, see Figures 11-13 ;

[0088] 3.2) If the real-time oil fume concentration satisfies C1 3 , it can be determined that it is a small and medium oil fume working condition such as stewing, clear frying and frying, at this working condition, the fan 22 will be operated at a medium speed (to ensure that the noise of the whole machine is small and to improve the user experience), the rotating speed of the fan 22 is n Z , and the driving mechanism 51 will be in a state of n Z1 ~n Z2 (optimally n Z1 ~nZ2 The opening angle of the smoke baffle 12 is θ Z in the range of θ Z1 ~ θ Z2 , and the value of θ Z1 may be given by test results, and the value is determined by the thought that when the oil fume concentration is in the range of C1~C2, the fan 22 reaches the upper limit speed of the middle-grade noise (52-56 dB is the noise range under the middle grade), and the smoke baffle 12 opens the minimum angle θ Z1 , and no oil fume escapes, which can ensure the oil fume suction effect, and the value of θ Z2 is that when the fan 22 reaches the lower limit speed n Z1 of the middle-grade noise, the flow rate allocated by the opening angle θ Z2 of the smoke baffle 12 does not affect the continuous refrigeration state of the condenser 421; this is because the fan 22 speed is determined, and the flow rate is also determined under the same working condition, the angle of the opening of the smoke baffle 12 is large, and the flow rate of the air inlet 11 is large, and the condenser 421 gets small amount of cooling air, and if the condenser 421 continues to have poor heat dissipation, it will reach the critical temperature and affect the refrigeration function; preferably, θ Z1 ~ θ Z2 is 15~45°, and in this angle range, the opening angle of the smoke baffle 12 is adjusted according to the temperature △T (T-Tz) required by the condenser 421 to be cooled, to realize the flow rate distribution of the fan 22, that is, to realize high refrigeration efficiency (the better the condenser 421 cools, the higher the efficiency) with low fan energy consumption (low speed), see Figure 14 and Figure 15 ;

[0089] 3.3) If the real-time oil fume concentration C≥C2, it is a large oil fume working condition, usually in cooking such as stir-frying, and in this working condition, the opening angle of the smoke baffle 12 is θ D , in the range of θ D1 ~ θ D2 , and the value can be given by test results, and the value is determined by the thought that when the oil fume concentration reaches C2 or above, the fan 22 speed is n D under this working condition, which is in high-grade operation (to ensure the oil fume suction effect of the whole machine and improve the user experience), and the fan 22 speed is in the range of n D1 ~ n D2 (n D is not less than n z , and preferably n D1 ~ n D2 is 1300~1500r / min), and the fan 22 reaches the upper limit speed n D2(58-62dB is high under the noise range), and the smoke baffle 12 open minimum angle θ D1 , there will be no oil smoke escape, so you can guarantee the effect of oil fume suction, θ D2 The value is when the fan reaches the lower limit of high noise speed n D1 , the smoke baffle 12 open angle θ D2 The flow allocated will not affect the condenser 421 continue to cool state; θ D Not less than θ Z , preferably θ D1 ~ θ D2 45~80°; then according to the condenser 421 need to cool temperature △T (T-Tz) to adjust the opening angle of the smoke baffle 12, the flow distribution of the fan 22, that is, to achieve the effect of oil fume suction while ensuring the lower fan energy consumption to achieve higher cooling efficiency, see Figure 16 And Figure 17 ; step 3.2) and step 3.3) are in the state of oil fume exhaust and condenser 421 heat dissipation, the difference is the size of the opening angle of the smoke baffle 12 and the size of the fan 22 speed;

[0090] 4) The suction hood is started, and then the output end of the drive mechanism 51 is driven downward, so that the smoke baffle 12 is closed, and the first air inlet 448 is in the condenser 421 heat dissipation state.

[0091] The "fluid communication" referred to in the present application refers to the spatial relationship between two components or parts (hereinafter referred to as the first part, the second part), that is, the fluid (gas, liquid or mixture of the two) can flow or / and be transported from the first part to the second part along the flow path, which can be directly connected between the first part and the second part, or indirectly connected between the first part and the second part through at least one third party, which can be a fluid passage such as pipe, channel, conduit, flow guide, hole, groove, etc., or a chamber allowing fluid flow or a combination thereof.

Claims

1. A range hood, comprising a first cabinet (1) and a second cabinet (2) arranged above the first cabinet (1), the first cabinet (1) being provided with an air inlet (11) on the front side, the second cabinet (2) being provided with a fan frame (21) in fluid communication with the first cabinet (1), and the fan frame (21) being provided with a fan (22); the range hood further comprising a refrigeration device outside the first cabinet (1) and the fan frame (21), the refrigeration device comprising a compressor (41), a condenser (421) and an evaporator (43); characterized in that: the range hood further comprises a third cabinet (3) arranged in front of the first cabinet (1); the condenser (421) is arranged in the third cabinet (3), and the third cabinet (3) comprises a valve (32) enabling the third cabinet (3) to be in communication with the fan frame (21) when the condenser (421) is dissipating heat; the refrigeration device further comprises a first air supplementing opening (448) arranged at the bottom of the third cabinet (3) and a second air supplementing opening (31) arranged on the side of the third cabinet (3), the second air supplementing opening (31) being higher than the first air supplementing opening (448); the third cabinet (3) and the refrigeration device can at least be in the following states: only exhaust state, the air inlet (11) is open, and the first air supplementing opening (448) and the second air supplementing opening (31) are closed; only condenser (421) heat dissipation state, the air inlet (11) is closed, the first air supplementing opening (448) is open, and the second air supplementing opening (31) is closed; exhaust and condenser (421) heat dissipation state, the air inlet (11) is open, the first air supplementing opening (448) is closed, and the second air supplementing opening (31) is open. the refrigeration device comprises an air supplementing assembly (44) arranged at the bottom of the third cabinet (3), the first air supplementing opening (448) is formed on the air supplementing assembly (44), and part of the air supplementing assembly (44) forming the first air supplementing opening (448) is movable up and down to realize opening and closing of the first air supplementing opening (448). the air supplementing assembly (44) comprises a first frame (441), a first baffle (443) and a cover plate (446), the first frame (441) is annular and fixed at the bottom of the third cabinet (3), the top of the first frame (441) is open, the cover plate (446) is movable up and down in cooperation with the first frame (441), and the first baffle (443) is arranged below the cover plate (446) in a spaced manner, so that the gap between the first baffle (443) and the cover plate (446) constitutes the first air supplementing opening (448); 2. The hood according to claim 1, characterized in that: when the first air supplementing opening (448) is at least partially exposed below the first frame (441), the first air supplementing opening (448) is open and in fluid communication with the third cabinet (3) through the annular interior of the first frame (441); when the first air supplementing opening (448) is located in the first frame (441), the first air supplementing opening (448) is closed.

3. The hood according to claim 2, characterized in that: ​ ​ 4. The hood according to claim 3, characterized in that: The range hood further comprises a moving mechanism, the moving mechanism comprising a driving mechanism (51), a second baffle (53) driven by the driving mechanism (51) to move up and down, and a yoke (55) provided at the bottom of the second baffle (53), the yoke (55) extending downward from the bottom of the second baffle (53) to press the cover plate (446) downward, the cover plate (446) and the first baffle (443) maintaining a tendency to move upward.

5. The hood according to claim 4, characterized in that: The air supplement assembly (44) further comprises a guide column (442) extending downward from the bottom surface of the cover plate (446), and an elastic member (444) sleeved on the outer periphery of the guide column (442), the upper end of the elastic member (444) abutting against the bottom surface of the cover plate (446), and the lower end of the elastic member (444) abutting against the bottom surface of the first frame (441), so that the elastic member (444) makes the cover plate (446) and the first baffle (443) maintain a tendency to reset to move upward.

6. The hood according to claim 4, characterized in that: The second baffle (53) is provided with a third air supplement opening (531) matched with the second air supplement opening (31), when the third air supplement opening (531) is at least partially aligned with the second air supplement opening (31), the second air supplement opening (31) is opened, and when the third air supplement opening (531) is completely misaligned with the second air supplement opening (31), the second air supplement opening (31) is blocked by the part of the second baffle (53) other than the third air supplement opening (531) to be closed.

7. The hood according to claim 4, characterized in that: The air inlet (11) is provided with a smoke baffle (12) capable of reversibly opening and closing the air inlet (11).

8. The hood according to claim 7, characterized in that: The moving mechanism further comprises a connecting rod (54), one end of the connecting rod (54) being rotatably connected to the second baffle (53), and the other end of the connecting rod (54) being rotatably connected to the smoke baffle (12) after penetrating through the first frame (441) of the air supplement assembly (44).

9. The hood according to claim 8, characterized in that: The position of the first frame (441) through which the connecting rod (54) penetrates is provided with a sealing strip (445).

10. The hood according to claim 4, characterized in that: The refrigeration device further comprises a flow distribution plate (423), the flow distribution plate (423) being provided at a position corresponding to the second air supplement opening (31) and being rotatably connected to the third box body (3), when the first air supplement opening (448) is opened, the flow distribution plate (423) is in a vertical state, and when the second air supplement opening (31) is opened, the flow distribution plate (423) is in a horizontal state.

11. The hood according to claim 10, characterized in that: The second baffle (53) is provided with a rack (56), and the flow distribution plate (423) is provided with a gear (424) engaged with the rack (56).

12. The hood according to claim 1, characterized in that: The third box (3) is provided with a second baffle (53) capable of moving up and down, the second baffle (53) is provided with a third air supplement opening (531) matched with the second air supplement opening (31), when the third air supplement opening (531) is at least partially aligned with the second air supplement opening (31), the second air supplement opening (31) is opened, when the third air supplement opening (531) is completely misaligned with the second air supplement opening (31), the second air supplement opening (31) is blocked by the part of the second baffle (53) other than the third air supplement opening (531) and is closed.

13. The hood according to claim 1, characterized in that: The refrigeration device further comprises a flow distribution plate (423) provided at a position corresponding to the second air supplement opening (31) and rotationally connected with the third box (3), the flow distribution plate (423) is provided with through holes (4231), the through holes (4231) on the left and right sides have the smallest area, and the through holes (4231) in the middle have the largest area; when the first air supplement opening (448) is opened, the flow distribution plate (423) is in a vertical state, and when the second air supplement opening (31) is opened, the flow distribution plate (423) is in a horizontal state.

14. The hood according to any one of claims 1-13, characterized in that: The rear side of the first box (1) or the second box (2) is provided with a guide plate (13) opposite to the valve (32), and the guide plate (13) is in an arc shape protruding forward.

15. The hood according to any one of claims 1-13, characterized in that: The bottom of the fan frame (21) extends to the bottom of the second box (2), and the bottom of the fan frame (21) is matched with the top of the first box (1).

16. The hood according to claim 15, characterized in that: The fan frame (21) comprises a fan frame upper part (211) and a fan frame lower part (212), and the fan frame lower part (212) is in a state of gradually inclining from the left and right sides to the middle from bottom to top.

17. The hood according to any one of claims 1-13, characterized in that: The compressor (41) and the evaporator (43) are arranged in the second box (2), the front side of the second box (2) is provided with a cold air outlet (23) for blowing cold air after heat exchange with the evaporator (43), and the top of the second box (2) is provided with an air inlet (24) for air supplement of the evaporator (43).

18. A control method for a range hood as defined in claim 1, characterized by: The method comprises the following steps: 1) Start, judge whether the refrigeration device needs to be started, if yes, the refrigeration device is started, and step 2) is entered, if not, the refrigeration device is not started, then the air inlet (11) is normally opened when the range hood is working, the air inlet (11) is closed when the range hood is not working, and then the process is ended; 2) Detect the real-time temperature T of the condenser (421), judge whether heat dissipation is needed, when T>Tz, it is judged that heat dissipation is needed at this time, then it is judged whether it is in a cooking state, if yes, step 3) is entered, if not, step 4) is entered, wherein Tz is the normal working temperature of the condenser (421) preset; 3) Perform corresponding operation according to the detected real-time oil fume concentration C; 3.1) if C≤C1, C1 is a first preset oil fume threshold value, the air inlet (11) is closed, the first air supplement opening (448) is opened, and the second air supplement opening (31) is closed, in a condenser (421) heat dissipation state only; 3.2) If C > C1 is satisfied, the air inlet (11) is opened, the first air supplement inlet (448) is closed, the second air supplement inlet (31) is opened, and the state is that of oil fume extraction and condenser (421) heat dissipation; 4) The range hood is started, the air inlet (11) is closed, and the first air supplement inlet (448) is opened, and the state is that of condenser (421) heat dissipation only.

19. The control method of claim 18, wherein: The air inlet (11) is provided with a smoke baffle (12) capable of reversibly opening and closing the air inlet (11); if C1 Z , C2 is a second preset oil fume threshold, and C2>C1, the opening angle of the smoke baffle (12) is θ D . D , and θ Z is not less than θ .

20. The control method of claim 19, wherein: θ Z is in the range of 15-45°, and θ D is in the range of 45-80°.

21. The control method of claim 19, wherein: If C1 < C < C2 is satisfied, the rotational speed of the fan (22) is n Z If C ≥ C2 is satisfied, the rotational speed of the fan (22) is n D , and n D is not less than n Z .

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