High-air-pressure range hood with air duct provided with anti-backflow structure

Abstract

The utility model discloses a high air pressure range hood with an air duct provided with an anti-backflow structure, which belongs to the technical field of range hoods and comprises a range hood shell, the front side of the range hood shell is an inclined plane, a switch touch screen interface is arranged above the front side of the range hood shell, a case is arranged on the rear side of the range hood shell, and the case is provided with an anti-backflow structure. An air duct body is connected and mounted above the case, an automatic door is arranged on the front side of the range hood shell, an oil fume filter tank is arranged below the front side of the range hood shell, a fan shell is arranged in the case, an exhaust fan is arranged in the fan shell, and a three-phase direct-current brushless motor is connected and mounted on a filter element on the right side of the exhaust fan; according to the high-air-pressure range hood with the air duct provided with the anti-backflow structure, the problem that the cooking environment is affected due to the fact that oil smoke flows backwards easily in an existing range hood is solved, the high-air-pressure range hood is suitable for various kitchen environments, and a fresh cooking space is provided for a user.

Description

TECHNICAL FIELD

[0001] The utility model relates to range hood technical field, concretely is a high wind pressure range hood with anti-backflow structure. BACKGROUND

[0002] The high wind pressure range hood is born to solve the complex smoke exhaust problem, the maximum static pressure is more than 800Pa, far more than ordinary range hood, when working, the motor drives the wind wheel to rotate at high speed, forms the strong negative pressure area on the stove, quickly gathers and absorbs the oil smoke, even if being in high-rise, facing the public flue long distance, high resistance, or the cooking peak flue congestion, can also rely on the strong wind pressure, break through the obstruction, and the oil smoke is smoothly exhausted, and the backflow is eliminated, and the partial high-end version also carries the intelligent frequency conversion technology, adjusts the wind pressure automatically, adapts to different smoke exhaust conditions, and creates the fresh kitchen environment for you, but the existing high wind pressure range hood still has certain problems when using.

[0003] For example, the high wind pressure range hood with the application number 201520247641.7, the technical scheme is that: using the three-phase direct-current brushless motor drives the fan wheel of the spiral type unequal pitch blade structure with the spiral angle of 35 degrees to 55 degrees, generates the wind pressure greater than 600 pascal to overcome the wind resistance generated by the complex flue environment of high-rise building, and the harmful gas generated by the stove and the cooking utensil is effectively exhausted outside the kitchen, in order to ensure the oil smoke absorption efficiency of the range hood, the gap between the fan wheel and the fan shell is less than 2.5mm, the suction port of the range hood is provided with the guide wind channel inclined to the center of the cooking bench, the wind pressure of the range hood is greater than 300 pascal when the air volume is 7m3 / s, and the total pressure efficiency is greater than 30% when the air volume is 7m3 / s, but the existing range hood has limited wind pressure, during the cooking peak period, the pressure in the flue increases sharply, when the wind pressure of the range hood is insufficient to overcome the flue resistance, the oil smoke will backflow into the kitchen, and in addition, the traditional range hood check valve is simple in design, is easy to be closed tightly due to oil stains adhesion and component aging after long-term use, and the external oil smoke enters.

[0004] In view of this, in view of the above problems, the present case is generated through in-depth research.

[0005] In view of the above problems, the original high wind pressure range hood is innovatively designed. INVENTION CONTENTS

[0006] The utility model aims at providing a high wind pressure range hood with an anti-backflow structure to solve the problem of oil smoke backflow during cooking.

[0007] To achieve the above object, the utility model provides the following technical scheme:

[0008] The utility model provides a kind of high wind pressure range hood with anti-backflow structure, comprising range hood shell, the front side of the range hood shell is inclined, and the front side of the range hood shell is provided with switch touch screen interface, the rear side of the range hood shell is provided with machine box, and the machine box is connected and installed with air duct body above, the front side of the range hood shell is provided with automatic door, and the front side of the range hood shell is provided with oil fume filtering groove below, the inside of the machine box is provided with fan shell, and the inside of the fan shell is provided with exhaust fan, and the filter element of the exhaust fan right side is connected and installed with three-phase direct-current brushless motor, the fan shell is connected with smoke pipe above, and the smoke pipe is provided with anti-backflow device shell inside.

[0009] Preferably, the automatic door is electrically connected to the switch touch screen interface, and the automatic door constitutes an automatic rotating structure.

[0010] The automatic door is electrically connected to the switch touch screen interface and constitutes an automatic rotating structure, so that the user can conveniently control the opening and closing of the automatic door through the switch touch screen interface without manual operation, improving the convenience of use. The range hood can be conveniently and quickly turned on and off before and after cooking, and the product also has a sense of technology.

[0011] Preferably, the automatic door is provided with an oil fume separation net at the rear side, and the oil fume separation net is installed on the front side of the range hood shell.

[0012] The oil fume separation net at the rear side of the automatic door is installed on the front side of the range hood shell, which can preliminarily filter the sucked oil fume and separate most of the oil, reducing the adhesion of oil to other components inside the range hood, reducing the cleaning difficulty, and prolonging the service life of the internal parts of the range hood.

[0013] Preferably, a center rod is fixedly installed in the middle of the anti-backflow device shell, and a plurality of shaft rods are fixedly connected around the center rod.

[0014] The center rod in the anti-backflow device shell and the shaft rods fixedly connected around the center rod provide a stable support structure for the subsequently installed fan blade group and other components, ensuring that the anti-backflow device can stably work in the smoke pipe and ensuring the reliability of the anti-backflow function.

[0015] Preferably, the shaft rods are each provided with a fan blade group, and the fan blade groups constitute a rotating structure with the center rod as the center.

[0016] The fan blade groups provided outside the shaft rods constitute a rotating structure with the center rod as the center. When the range hood works to generate suction, the fan blade groups can rotate under the action of the suction, and when the smoke exhaust passage is opened, the fan blade groups as a whole rotate to form a fan to accelerate smoke exhaust.

[0017] Preferably, the fan blade group includes a first fan blade and a second fan blade, and the first fan blade and the second fan blade are both hingedly connected to the two sides outside the shaft rod.

[0018] The first and second leaves of the leaf group are both hinged to the two sides of the shaft rod outside, and the double-leaf structure is similar to a butterfly check valve, which accelerates smoke exhaust when opened and enhances the sealing property of anti-backflow when closed, effectively preventing the backflow of oil fume into the kitchen.

[0019] Preferably, a torsional spring is fixedly installed in the middle of the shaft rod, and the left and right ends of the torsional spring are clamped to the upper surfaces of the first and second leaves.

[0020] The torsional spring fixedly installed in the middle of the shaft rod has the left and right ends clamped to the upper surfaces of the first and second leaves, and the torsional spring provides the leaf group with an automatic reset elastic force, so that the first and second leaves can be quickly closed after the oil fume extractor stops working and the suction force disappears, thereby preventing the backflow of oil fume in time.

[0021] Compared with the prior art, the high-wind-pressure oil fume extractor with the anti-backflow structure has the beneficial effects that:

[0022] 1. Accelerating smoke exhaust: the shaft rod outside is provided with a leaf group, and the leaf group is formed into a rotating structure with the center rod as the center; when the oil fume extractor works to generate a suction force, the leaf group can rotate under the action of the suction force, and the whole leaf group rotates to form a fan to accelerate smoke exhaust when the smoke exhaust passage is opened.

[0023] 2. Anti-backflow function: the leaf group comprises a first leaf and a second leaf, and the first and second leaves are both hinged to the two sides of the shaft rod outside; the first and second leaves of the leaf group are both hinged to the two sides of the shaft rod outside, and the double-leaf structure accelerates smoke exhaust when opened and enhances the sealing property of anti-backflow when closed, effectively preventing the backflow of oil fume into the kitchen. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is an appearance structure schematic view of the utility model;

[0025] Figure 2 It is an automatic door opening structure schematic view of the utility model;

[0026] Figure 3 It is a case cut structure schematic view of the utility model;

[0027] Figure 4 It is an anti-backflow device shell structure schematic view of the utility model;

[0028] Figure 5 It is a first leaf and second leaf opening structure schematic view of the utility model.

[0029] In the figure: 1, the range hood shell; 2, the machine box; 3, the air duct body; 4, the switch touch screen interface; 5, the oil fume filtering tank; 6, the automatic door; 7, the oil fume separation net; 8, the fan shell; 9, the exhaust fan; 10, the exhaust pipe; 11, the anti-backflow device shell; 12, the center rod; 13, the shaft; 14, the fan blade group; 141, the first fan blade; 142, the second fan blade; 15, the torsional spring. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0031] Please refer to Figures 1-5 The utility model provides a technical scheme:

[0032] A high wind pressure range hood with an anti-backflow structure, comprising a range hood shell 1, the front side of the range hood shell 1 is inclined, and a switch touch screen interface 4 is arranged on the upper side of the front side of the range hood shell 1, a machine box 2 is arranged on the rear side of the range hood shell 1, and an air duct body 3 is connected and installed on the upper side of the machine box 2, an automatic door 6 is arranged on the front side of the range hood shell 1, and an oil fume filtering tank 5 is arranged on the lower side of the front side of the range hood shell 1, a fan shell 8 is arranged in the machine box 2, an exhaust fan 9 is arranged in the fan shell 8, a three-phase direct-current brushless motor is connected and installed on the filter element on the right side of the exhaust fan 9, an exhaust pipe 10 is connected on the upper side of the fan shell 8, and an anti-backflow device shell 11 is arranged in the exhaust pipe 10.

[0033] The automatic door 6 is electrically connected with the switch touch screen interface 4, and the automatic door 6 constitutes an automatic rotating structure, an oil fume separation net 7 is arranged on the rear side of the automatic door 6 and installed on the front side of the range hood shell 1, the automatic door 6 is electrically connected with the switch touch screen interface 4 and constitutes an automatic rotating structure, so that the user can operate more conveniently without manually opening and closing the door body, and in the case that the hands are full of oil stains and the like, the automatic door 6 can be easily opened and closed through touch screen control, the use experience is improved, the oil fume separation net 7 on the rear side of the automatic door 6 is installed on the front side of the range hood shell 1, a large amount of oil in the oil fume can be intercepted in advance, the amount of oil entering the inside of the range hood is reduced, the degree of oil stain adhesion of the internal components is reduced, the trouble of frequent cleaning is reduced, and the overall service life of the range hood is prolonged.

[0034] The center rod 12 is fixedly installed in the middle of the anti-backflow device shell 11, a plurality of shaft rods 13 are fixedly connected around the center rod 12, a leaf group 14 is arranged outside each shaft rod 13, the leaf group 14 is in a rotating structure with the center rod 12 as the center, the leaf group 14 comprises first leaves 141 and second leaves 142, the first leaves 141 and the second leaves 142 are hingedly connected to the two sides outside the shaft rod 13, a torsional spring 15 is fixedly installed in the middle of the shaft rod 13, and the left and right ends of the torsional spring 15 are clamped on the upper surfaces of the first leaves 141 and the second leaves 142, the center rod 12 and the shaft rod 13 in the anti-backflow device shell 11 build a stable frame for the entire anti-backflow structure, so that the leaf group 14 and other components installed subsequently have a reliable support basis, and the anti-backflow function can be stably played, the leaf group 14 arranged outside the shaft rod 13 is in a rotating structure with the center rod 12 as the center, when the range hood works, the leaf group 14 can be smoothly opened to allow the oil fume to be discharged; when the range hood stops working, the leaf group 14 can be automatically closed by relying on the self structure and external wind pressure, the oil fume is effectively blocked from backflowing, and the realization of the anti-backflow function is guaranteed, the leaf group 14 is composed of the first leaves 141 and the second leaves 142 hingedly connected to the two sides outside the shaft rod 13, the double-leaf structure is matched with each other when being closed, can be more closely fitted, and the sealing performance of the anti-backflow is improved, so that the oil fume is effectively prevented from backflowing into the kitchen, the left and right ends of the torsional spring 15 in the middle of the shaft rod 13 are clamped on the upper surfaces of the first leaves 141 and the second leaves 142, and the torsional spring 15 provides power for the automatic reset of the leaf group 14, when the range hood stops working and the suction force disappears, the torsional spring 15 rapidly pushes the leaves to be closed, the oil fume is timely prevented from backflowing, and the timeliness and reliability of the anti-backflow are enhanced.

[0035] Working principle:

[0036] In use, the automatic door 6 is automatically opened by the switch touch screen interface 4, and a three-phase direct-current brushless motor is started at the same time, the exhaust fan 9 is driven to rotate, the exhaust fan 9 generates suction force, oil fume generated by the stove is sucked into the range hood, the oil fume passes through the oil fume separation net 7 first, most of the oil is filtered out, then enters the fan housing 8, and is discharged to the outside through the smoke exhaust pipe 10,

[0037] In the smoke exhaust process, the anti-backflow device shell 11 in the smoke exhaust pipe 10 plays a role, when the range hood works, the suction force generated by the range hood drives the leaf group 14 to rotate around the center rod 12, the first leaves 141 and the second leaves 142 are opened, and the oil fume is smoothly discharged; when the range hood stops working or the pressure in the flue is greater than the suction force of the range hood, the external wind pressure drives the leaf group 14 to be closed, and the elastic force provided by the torsional spring 15 also assists the leaf group 14 to be rapidly closed, so that the oil fume is prevented from backflowing.

[0038] The contents not described in detail in the specification belong to the prior art known by the person skilled in the art.

[0039] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-pressure range hood with an anti-backflow structure in its ductwork, comprising a range hood housing (1), wherein the front side of the range hood housing (1) is inclined, and a switch touch screen interface (4) is provided on the upper front side of the range hood housing (1); a housing (2) is provided on the rear side of the range hood housing (1), and a duct body (3) is connected and installed on the upper part of the housing (2), characterized in that: An automatic door (6) is provided on the front side of the range hood housing (1), and an oil fume filter groove (5) is provided on the lower front side of the range hood housing (1). A fan housing (8) is provided inside the casing (2), and an exhaust fan (9) is provided inside the fan housing (8). A three-phase DC brushless motor is connected to the filter element on the right side of the exhaust fan (9). An exhaust pipe (10) is connected to the top of the fan housing (8), and an anti-backflow device housing (11) is provided inside the exhaust pipe (10).

2. A high-pressure range hood with an anti-backflow structure in its duct as described in claim 1, characterized in that: The automatic door (6) is electrically connected to the touch screen interface (4), and the automatic door (6) constitutes an automatic rotation structure.

3. A high-pressure range hood with an anti-backflow structure in its duct as described in claim 1, characterized in that: An oil fume separation net (7) is provided on the rear side of the automatic door (6), and the oil fume separation net (7) is installed on the front side of the range hood casing (1).

4. A high-pressure range hood with an anti-backflow structure in its duct as described in claim 1, characterized in that: The anti-backflow device has a central rod (12) fixedly installed in the middle of the outer shell (11), and several shafts (13) are fixedly connected around the central rod (12).

5. A high-pressure range hood with an anti-backflow structure in its duct as described in claim 4, characterized in that: Each of the shafts (13) is provided with a fan blade assembly (14), and the fan blade assembly (14) forms a rotating structure with the central rod (12) as the center.

6. A high-pressure range hood with an anti-backflow structure in its duct as described in claim 5, characterized in that: The fan blade assembly (14) includes a first fan blade (141) and a second fan blade (142), and both the first fan blade (141) and the second fan blade (142) are hinged to the two outer sides of the shaft (13).

7. A high-pressure range hood with an anti-backflow structure in its duct as described in claim 6, characterized in that: A torsion spring (15) is fixedly installed in the middle of the shaft (13), and the two ends of the torsion spring (15) are engaged with the upper surfaces of the first blade (141) and the second blade (142).

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