Range hood

Abstract

The application provides a smoke machine, and relates to the technical field of kitchen appliances, which comprises a smoke collecting hood, an inlet opening being arranged on the smoke collecting hood, and an ejector connected with the smoke collecting hood, wherein the ejector comprises an air outlet mechanism, the air outlet mechanism is located below the smoke collecting hood, the air outlet mechanism is provided with an air outlet opening facing the smoke collecting hood, and the air outlet mechanism can generate an air flow with a flow rate greater than that of the smoke at the position of the air outlet opening. When a large amount of smoke is generated during cooking, the ejector can be started, the air outlet opening of the air outlet mechanism sprays a high-speed air flow towards the smoke collecting hood, so that the surrounding air is gathered to the position of the high-speed air flow, therefore, when the smoke generated by the cooking utensil rises to a certain height and is about to start to diffuse, the high-speed air flow can guide the smoke, the smoke flows laterally to the position of the air outlet mechanism, and then is sucked into the inlet opening together with the high-speed air flow, thereby avoiding the escape of the smoke from the outside of the smoke machine.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of kitchen appliances, in particular to a range hood. BACKGROUND

[0002] At present, the range hood on the market has the problem of smoke leakage, and the smoke leakage and incomplete smoke suction have become the main problems complained by consumers.

[0003] In order to solve the problem of smoke leakage, in the prior art, opposite fluid flow is used around the range hood to form a wind curtain wall to block the escape of smoke, and the disadvantage is that when the auxiliary fluid and the cooking smoke flow oppositely, mutual interference is easy to occur, and the diffusion of smoke is accelerated. SUMMARY

[0004] The purpose of the present application is to provide a range hood to alleviate the technical problem that when the auxiliary fluid and the cooking smoke flow oppositely in the existing curtain wall type anti-overflow range hood, mutual interference is easy to occur, and the diffusion of smoke is accelerated.

[0005] The range hood provided by the embodiment of the present application comprises:

[0006] A smoke collecting hood is provided with a smoke inlet;

[0007] An ejector is connected with the smoke collecting hood;

[0008] The ejector comprises:

[0009] An air outlet mechanism is located below the smoke collecting hood, and the air outlet mechanism has an air outlet towards the smoke collecting hood, and the air outlet mechanism can generate an air flow at the air outlet with a flow rate greater than the flow rate of the smoke at the position.

[0010] Further, the ejector is movably connected with the smoke collecting hood, so that the position of the air outlet relative to the smoke inlet is adjustable.

[0011] Further, the ejector comprises:

[0012] A driving mechanism is connected with the smoke collecting hood and the air outlet mechanism respectively, and the driving mechanism is used to drive the air outlet mechanism to move vertically towards or away from the smoke collecting hood.

[0013] Further, a smoke detection mechanism is connected with the ejector;

[0014] When the smoke concentration detected by the smoke detection mechanism is greater than a preset value, the air outlet mechanism is switched to the working state and air is ejected.

[0015] Further, the smoke detection mechanism is fixedly connected with the smoke collecting hood;

[0016] Alternatively, the flue gas detection mechanism is detachably connected with the smoke collecting hood, and the flue gas detection mechanism is wirelessly connected with the ejector.

[0017] Further, a hidden groove is arranged on the surface of the smoke collecting hood, and the air outlet mechanism has a working state and a non-working state, in the non-working state, the air outlet mechanism is located in the hidden groove, and in the working state, the air outlet mechanism is located below the smoke collecting hood.

[0018] Further, the air outlet mechanism has an air inlet and a gas guide channel communicating the air inlet and the air outlet, and a fan is arranged in the gas guide channel.

[0019] Further, the number of the smoke inlets on the smoke collecting hood is two, and the ejector is located between the two smoke inlets.

[0020] Alternatively, the ejector is located at the rear side of the smoke inlet.

[0021] Further, the air outlet mechanism and the lower surface of the smoke collecting hood are both inclined relative to the horizontal plane, and the directions of the inclinations are consistent.

[0022] Further, the number of the smoke inlets on the smoke collecting hood is two, and the smoke collecting hood is equipped with oil nets corresponding to the smoke inlets.

[0023] The lower surface of the smoke collecting hood has a mounting area between the two oil nets, the ejector is mounted in the mounting area, and the plane where the mounting area is located is higher than the lower surface of the oil nets.

[0024] The smoke machine provided by the embodiment of the application comprises a smoke collecting hood, the smoke collecting hood is provided with a smoke inlet, an ejector is connected with the smoke collecting hood, and the ejector comprises an air outlet mechanism, the air outlet mechanism is located below the smoke collecting hood, the air outlet mechanism has an air outlet facing the smoke collecting hood, and the air outlet mechanism can generate an airflow with a flow velocity greater than the flow velocity of flue gas at the position of the air outlet. When a large amount of flue gas is generated during cooking, the ejector can be started, the air outlet of the air outlet mechanism sprays a high-speed airflow towards the smoke collecting hood, the speed of the airflow is much greater than the upward speed of flue gas at the same position, according to Bernoulli's principle, the high-speed flowing gas generates a pressure difference, thereby driving the surrounding air to gather to the position of the high-speed airflow, therefore, when the flue gas generated by the cooking utensil rises to a certain height and is about to begin to diffuse, the flue gas can be guided by the high-speed airflow, the flue gas flows laterally to the position of the air outlet mechanism, and then is sucked into the smoke inlet together with the high-speed airflow, thereby avoiding the escape of the flue gas from the outside of the smoke machine. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to illustrate the technical solutions in the specific embodiments of the present application or the prior art more clearly, the attached drawings needed in the description of the specific embodiments or the prior art will be briefly introduced. Obviously, the attached drawings in the following description are some embodiments of the present application, and other attached drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0026] Figure 1 A schematic view of an air outlet mechanism of a smoke machine in a non-working state according to an embodiment of the present application;

[0027] Figure 2 A schematic view of an air outlet mechanism of a smoke machine in a working state according to an embodiment of the present application;

[0028] Figure 3 A schematic view of smoke flow when an air outlet mechanism of a smoke machine is in a non-working state according to an embodiment of the present application;

[0029] Figure 4 A schematic view of smoke flow when an air outlet mechanism of a smoke machine is in a working state according to an embodiment of the present application;

[0030] Figure 5 A schematic view of an air outlet mechanism of a smoke machine according to an embodiment of the present application;

[0031] Figure 6 A schematic view of an air outlet mechanism of another smoke machine in a non-working state according to an embodiment of the present application;

[0032] Figure 7 A schematic view of an air outlet mechanism of a smoke machine in a working state according to an embodiment of the present application; Figure 6

[0033] A schematic view of smoke flow when an air outlet mechanism of a smoke machine is in a working state according to an embodiment of the present application. Figure 8 Figure 6

[0034] Figure legend: 100 - smoke hood; 110 - oil screen;

[0035] 200 - air outlet mechanism; 210 - air outlet part; 211 - air outlet; 220 - linkage part; 230 - fan;

[0036] 300 - smoke detection mechanism. DETAILED DESCRIPTION

[0037] ​​The technical solutions of the present application will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of, rather than all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present application.

[0038] As shown in Figures 1-8 , the smoke machine provided by the embodiment of the present application comprises a smoke collecting hood 100, and an air inlet is arranged on the smoke collecting hood 100. The air inlet is located on the lower surface of the smoke collecting hood 100, and the number of the smoke collecting hoods 100 can be two, corresponding to the left and right two cookers of the cooker.

[0039] As shown in Figure 2 , Figure 4 and Figure 5 , the smoke machine further comprises an ejector connected with the smoke collecting hood 100. The ejector can be fixedly connected with the smoke collecting hood 100 or movably connected with the smoke collecting hood 100. The ejector comprises an air outlet mechanism 200 located below the smoke collecting hood 100. The air outlet mechanism 200 has an air outlet 211 facing the smoke collecting hood 100, so as to generate an airflow from bottom to top. The air outlet mechanism 200 can generate an airflow with a flow rate greater than the flow rate of the smoke at the position of the air outlet 211. Generally, in the existing cooking environment, the rising speed of the smoke is approximately in the range of 1.5 m / s-2 m / s, and the flow rate of the airflow generated by the air outlet mechanism 200 in the embodiment can be greater than 5 m / s.

[0040] When a large amount of smoke is generated during cooking, the ejector can be started. The air outlet 211 of the air outlet mechanism 200 sprays high-speed airflow towards the smoke collecting hood 100. The flow rate of the airflow is much greater than the rising speed of the smoke at the same position. According to Bernoulli's principle, the high-speed flowing gas will generate a pressure difference, so as to drive the surrounding air to gather to the position of the high-speed airflow. Therefore, when the smoke generated by the cooking utensil rises to a certain height and is about to begin to diffuse, the high-speed airflow can guide the smoke. The smoke flows transversely to the position of the air outlet mechanism 200, and then is sucked into the air inlet together with the high-speed airflow, thereby avoiding the escape of the smoke from the outside of the smoke machine.

[0041] As shown in Figure 1 and Figure 2 , the ejector is movably connected with the smoke collecting hood 100, so that the position of the air outlet 211 relative to the air inlet is adjustable.

[0042] By changing the position of the air outlet mechanism 200 on the ejector, the position of the air outlet 211 is changed, on the one hand, the air outlet mechanism 200 can be switched between the working state and the non-working state, for example, in the working state, the air outlet mechanism 200 is located at a position below the fume hood 100 at a distance D, the value of D is in the range of 200mm-400mm, and in the non-working state, the air outlet mechanism 200 can be moved to a position that is attached to the lower surface of the fume hood 100, thereby avoiding interference with cooking.

[0043] In an implementable scheme, the ejector can be connected with the fume hood 100 through a rocker arm, the rocker arm has freedom in the vertical and horizontal directions, and a damping structure is arranged at the joint of the rocker arm, and the user can manually move the air outlet mechanism 200 to the position and keep it stationary.

[0044] In this embodiment, the ejector includes a driving mechanism, which is connected with the fume hood 100 and the air outlet mechanism 200 respectively, and is used to drive the air outlet mechanism 200 to move vertically towards or away from the fume hood 100.

[0045] As shown in Figures 1-4 , the driving mechanism can drive the air outlet mechanism 200 to move in the vertical direction towards or away from the fume hood 100, thereby automatically realizing free switching of the air outlet mechanism 200 between the working state and the non-working state. The maximum descending distance D of the air outlet mechanism 200 can be set to 300mm in advance, and the high-speed airflow reaches the lower surface of the fume hood 100 through 300mm, the high-speed airflow is slowed down to a certain extent, thereby avoiding secondary interference with the induced flue gas, and reaching the critical point of flue gas diffusion.

[0046] The driving mechanism can be, but is not limited to, a motor screw rod module, a motor gear rack module or an electric telescopic cylinder module. The driving mechanism is located inside the shell of the range hood.

[0047] The range hood can further include a flue gas detection mechanism 300, which is connected with the ejector, and when the flue gas concentration detected by the flue gas detection mechanism 300 is greater than a preset value, the air outlet mechanism 200 is switched to the working state and blows air.

[0048] When the range hood is working normally, the flue gas rises from the cooking utensil to a certain distance, the flue gas starts to diffuse, and part of the flue gas escapes from the outside of the range hood without being sucked away, when the amount of flue gas generated by the cooking utensil increases to a certain preset value, it is captured by the flue gas detection mechanism 300, an output signal is output, the air outlet mechanism 200 descends vertically to the horizontal plane, and the air outlet mechanism 200 starts to work, the fan starts to work, and the fluid is ejected from the air outlet 211, the ejection airflow speed is much greater than the rising speed of the flue gas at the same position. Thus, the purpose of automatically assisting the overflow function is achieved.

[0049] In the embodiment, the flue gas detection mechanism 300 is fixedly connected with the smoke hood 100.

[0050] The flue gas detection mechanism 300 can be installed at a position close to the front side of the lower surface of the smoke hood 100, and can also be placed at other positions. The flue gas detection mechanism 300 and the ejector can be connected by a cable.

[0051] In some implementable solutions, the flue gas detection mechanism 300 is detachably connected with the smoke hood 100, and the flue gas detection mechanism 300 and the ejector are connected in a wireless communication manner.

[0052] The flue gas detection mechanism 300 can be set as a movable independent module, and a user can place the flue gas detection mechanism 300 module according to a specific cooking environment. For example, in a general cooking scene, the flue gas detection mechanism 300 can be fixed on the installation position of the smoke hood 100. The installation position can be on the lower surface of the smoke hood 100 and can be connected by a buckle or magnetic attraction. The user can place the flue gas detection mechanism 300 on the circumferential side wall of the smoke hood 100, for example, hanging on the left side wall, the right side wall or the front side wall, or placing the flue gas detection mechanism 300 on the table beside the cooktop, so as to change the position of flue gas detection. In this case, the diversion function is started only when the flue gas has overflowed and the overflow concentration is large, so that the diversion function can be prevented from being started in advance and affecting the user's cooking.

[0053] The surface of the smoke hood 100 can be provided with a hidden groove, and the air outlet mechanism 200 has a working state and a non-working state. In the non-working state, the air outlet mechanism 200 is located in the hidden groove; and in the working state, the air outlet mechanism 200 is located below the smoke hood 100.

[0054] In the non-working state, the air outlet mechanism 200 can be hidden in the hidden groove, and the lower surface of the air outlet mechanism 200 can be flush with the lower surface of the smoke hood 100. The air outlet mechanism 200 after being stored is more beautiful and easier to clean; and in the working state, the air outlet mechanism 200 moves downward and slides out of the hidden groove to a preset position in the working state.

[0055] The air outlet mechanism 200 has an air inlet and a gas guide channel communicating the air inlet and an air outlet 211, and a fan 230 is arranged in the gas guide channel.

[0056] After the fan 230 is started, a high-speed airflow can be formed at the air outlet 211, and the flow rate is above 5 m / s. In the embodiment, the flow rate of the air outlet 211 can be 18 m / s. With the rising of the high-speed airflow, the flow rate of the high-speed airflow gradually decreases. The flow rate at a position 200 mm away from the ejector can be 14 m / s, and the flow rate at a position 400 mm away from the ejector can be 10 m / s.

[0057] The fan can be of various motor forms such as axial flow, centrifugal flow, mixed flow, etc., and the axial flow motor is preferred in this case.

[0058] The air outlet 211 of the air outlet mechanism 200 can be provided in a strip shape, a circular shape or other shapes, and the strip shape is preferred in this case, with the width of the narrow side being less than 5 mm, for example, 3 mm.

[0059] The air outlet mechanism 200 can include an air outlet portion 210 and a linkage portion 220, the air outlet 211 is provided on the air outlet portion 210, the first flow channel is provided in the air outlet portion 210, the first flow channel is in communication with the air outlet 211, the linkage portion 220 is movably connected with the smoke hood 100, and the linkage portion 220 is pushed and pulled to realize the lifting and lowering of the air outlet mechanism 200. The second flow channel in communication with the first flow channel can be provided in the linkage portion 220, the fan 230 is provided in the second flow channel, the top end of the linkage portion 220 has an opening for external airflow to enter the second flow channel, and then under the action of the fan 230, the airflow enters the first flow channel and then flows out from the air outlet 211.

[0060] Specifically, the extension direction of the air outlet portion 210 and the extension direction of the linkage portion 220 can be perpendicular to each other.

[0061] The bottom end of the linkage portion 220 can be connected to one end of the air outlet portion 210, so that the air outlet mechanism 200 is in the shape of "L", or it can be connected to the middle position of the air outlet portion 210, so that the air outlet mechanism 200 is in the shape of "T". When the linkage portion 220 is connected to the middle position of the air outlet portion 210, the air outlet 211 can be provided on the air outlet portion 210 on both sides of the linkage portion 220.

[0062] The number of linkage portions 220 can also be two, the bottom ends of the two linkage portions 220 are respectively connected to the two ends of the air outlet portion 210, thereby forming a structure similar to "U", and the fan 230 can be provided in each linkage portion 220, thereby improving the air volume.

[0063] As shown in Figure 2 In an implementable scheme, the number of smoke inlets on the smoke hood 100 is two, the ejector is located between the two smoke inlets, and the length direction of the air outlet 211 of the air outlet mechanism 200 can be the same as the front-rear direction. The length direction of the air outlet mechanism 200 is perpendicular to the wall surface and is placed in the middle of the range hood, which forms a low pressure field perpendicular to the wall surface at the lower end of the middle of the range hood, and the smoke gas is introduced to the middle of the range hood, avoiding the escape of the smoke gas.

[0064] As shown in Figures 6-8As shown, in another feasible embodiment, the injector is located behind the smoke inlet, and the length direction of the air outlet 211 of the air outlet mechanism 200 can be aligned with the left-right direction. After the injector is activated, it can guide the smoke from the left and right sides to the rear, thereby preventing the smoke from escaping from the left and right sides of the smoke collection hood 100.

[0065] The lower surfaces of both the air outlet mechanism 200 and the smoke collection hood 100 are inclined relative to the horizontal plane, and the inclination direction is the same.

[0066] When the air outlet mechanism 200 is not in operation, it can be hidden in the hidden groove on the lower surface of the smoke hood 100. At this time, the lower surface of the air outlet mechanism 200 is flush with the lower surface of the smoke hood 100, and the oil stains on the lower surface of the air outlet mechanism 200 can flow into the oil cup along the lower surface of the smoke hood 100.

[0067] like Figure 2 As shown, the number of smoke inlets on the smoke hood 100 is two, and the smoke hood 100 is equipped with oil mesh 110 corresponding to the smoke inlets; the lower surface of the smoke hood 100 has an installation area located between the two oil meshes 110, the injector is installed in the installation area, and the plane of the installation area is higher than the lower surface of the oil mesh 110.

[0068] The two oil filters 110 on the left and right and the installation area can form a stepped structure. The stepped structure can form a secondary cavity. Some of the guided flue gas enters the flue gas inlet inside the oil filter 110 through this secondary cavity to prevent escape.

[0069] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A range hood, characterized in that, include: A smoke collection hood (100) is provided with a smoke inlet; The injector is connected to the smoke hood (100); The injector includes: An air outlet mechanism (200) is located below the smoke hood (100). The air outlet mechanism (200) has an air outlet (211) facing the smoke hood (100). The air outlet mechanism (200) is capable of generating an airflow at the air outlet (211) with a flow velocity greater than that of the smoke at that location. The number of smoke inlets on the smoke collection hood (100) is two, and the smoke collection hood (100) is equipped with an oil mesh (110) corresponding to the smoke inlets. The lower surface of the smoke hood (100) has an installation area located between two oil meshes (110), the injector is installed in the installation area, and the plane of the installation area is higher than the lower surface of the oil meshes (110).

2. The range hood according to claim 1, characterized in that, The injector is movably connected to the smoke hood (100) so that the position of the air outlet (211) relative to the smoke inlet is adjustable.

3. The range hood according to claim 2, characterized in that, The injector includes: The driving mechanism is connected to the smoke hood (100) and the air outlet mechanism (200) respectively. The driving mechanism is used to drive the air outlet mechanism (200) to move vertically toward or away from the smoke hood (100).

4. The range hood according to claim 3, characterized in that, Includes a flue gas detection mechanism (300), which is connected to the injector; When the flue gas concentration detected by the flue gas detection mechanism (300) is greater than a preset value, the air outlet mechanism (200) is switched to working state and air is sprayed.

5. The range hood according to claim 4, characterized in that, The flue gas detection mechanism (300) is fixedly connected to the smoke collection hood (100); Alternatively, the flue gas detection mechanism (300) can be detachably connected to the smoke hood (100), and the flue gas detection mechanism (300) can be wirelessly connected to the injector.

6. The range hood according to any one of claims 2-5, characterized in that, The smoke hood (100) has a hidden groove on its surface. The air outlet mechanism (200) has a working state and a non-working state. In the non-working state, the air outlet mechanism (200) is located in the hidden groove. In the working state, the air outlet mechanism (200) is located below the smoke hood (100).

7. The range hood according to any one of claims 1-5, characterized in that, The air outlet mechanism (200) has an air inlet and an air guide channel connecting the air inlet and the air outlet (211), and a fan (230) is installed in the air guide channel.

8. The range hood according to any one of claims 1-5, characterized in that, The smoke hood (100) has two smoke inlets, and the injector is located between the two smoke inlets; Alternatively, the injector may be located behind the smoke inlet.

9. The range hood according to any one of claims 1-5, characterized in that, The lower surfaces of the air outlet mechanism (200) and the smoke collection hood (100) are both inclined relative to the horizontal plane, and the inclination directions are the same.

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