CN110686295A - Fume exhaust fan - Google Patents

Abstract

The invention discloses a range hood, which comprises a fume collecting hood, a box body and a fan system arranged in the box body, wherein the fume collecting hood and the box body are fixedly connected, and the range hood is characterized in that: the range hood further comprises a moving mechanism, the moving mechanism comprises a slide rail assembly, the slide rail assembly comprises a first slide rail and a second slide rail, the first slide rail can be fixedly connected with an external installation base, the second slide rail is installed on the outer side of the top of the box body, and the first slide rail and the second slide rail are in sliding fit to enable the box body to move back and forth. Compared with the prior art, the invention has the advantages that: through carrying out the back-and-forth movement to range hood whole for the power center (the source that produces the negative pressure) of fan system and holding together the regional back-and-forth movement of cigarette, thereby can deal with the actual oil smoke state when the user cooks in a flexible way, promote ultimate range hood effect on the basis of not improving performance parameters such as lampblack absorber rotational speed, promote the travelling comfort, adaptability and the flexibility ratio of range hood greatly.

Description

Fume exhaust fan

Technical Field

The invention relates to an oil fume purification device, in particular to a range hood.

Background

The range hood has become one of the indispensable kitchen household electrical appliances in modern families. The range hood works by utilizing the fluid dynamics principle, sucks and exhausts oil smoke through a centrifugal fan arranged in the range hood, and filters partial grease particles by using a filter screen. The centrifugal fan comprises a volute, an impeller arranged in the volute and a motor driving the impeller to rotate. When the impeller rotates, negative pressure suction is generated in the center of the fan, oil smoke below the range hood is sucked into the fan, accelerated by the fan and then collected and guided by the volute to be discharged out of a room.

The current range hood comprises various styles such as an European style, a deep suction style and a near suction style, and basically, the range hood is fixed on a wall to work. In the actual use process, the use of the kitchen range has various different conditions, and the negative pressure region of the range hood is required to be changed along with the use of the kitchen range, so that a good oil fume suction effect can be obtained.

The existing movable range hood can only aim at the condition of two-hole stoves, for example, the movable range hood disclosed in the chinese patent with the application number of 201210533477.7 comprises a range hood body which can be connected with a support body, wherein the support body is fixedly connected with at least two slide ways which are arranged in parallel up and down, the slide ways are horizontally arranged, and the back of the range hood body is fixedly connected with a slide rail which is matched with the slide ways; the range hood body can slide left and right relative to the support body, and can move left and right when the range hoods at different positions need to be used for smoke extraction and smoke exhaust, so that the range hood body is positioned right above the range hood, and the smoke extraction effect of the range hood is best; still like chinese patent application No. 201520172780.8 discloses a remove installation slip table for domestic smoke ventilator, including moving power device, moving rail set up and down, remove rail set and mount table about, move the rail set back up and down and remove rail set openly about through an mount table slidable mounting, will move rail set slidable mounting about and remove rail set slidable mounting by remove power device and drive about, the smoke ventilator can be removed about, and the position of nimble adjustment smoke ventilator on the horizontal direction makes it can be in all the time directly over the kitchen range of using, guarantees good work efficiency.

When the range hood is installed above a cooking bench with more holes, the four-hole gas cooker disclosed in chinese patent application No. 201620338175.8 includes a housing and four burner holes, wherein the burner holes are located on the housing, and the burner holes have four rows arranged in the left and right direction. At the moment, the range hood cannot well cover the oil smoke area due to insufficient front and back depth, so that a lot of oil smoke escapes, and especially direct impact is generated on a user standing in front of the range hood, and the user experience is greatly reduced.

Disclosure of Invention

The invention aims to solve the technical problem that the prior art is not enough, and provides the range hood which can move in the front-back depth direction, reduce the escape of oil smoke and improve the user experience.

The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a range hood, includes collection petticoat pipe, box and sets up the fan system in the box, collection petticoat pipe and box connection are fixed, its characterized in that: the range hood further comprises a moving mechanism, the moving mechanism comprises a slide rail assembly, the slide rail assembly comprises a first slide rail and a second slide rail, the first slide rail can be fixedly connected with an external installation base, the second slide rail is installed on the outer side of the top of the box body, and the first slide rail and the second slide rail are in sliding fit to enable the box body to move back and forth.

In order to enable the whole range hood to move more easily, move in a constrained state and improve the moving precision, the moving mechanism further comprises an electric push rod serving as a driving device and a moving part which can be fixedly connected with an external installation base, the electric push rod is fixedly connected with the box body, and the moving part is arranged on an output shaft of the electric push rod.

In order to guarantee that the range hood can be in a stable state in the moving process, the electric push rod is arranged on the inner side of the top of the box body, a sliding groove is formed in the top of the box body, the sliding groove extends in the front-back direction, the top of the moving part upwards penetrates through the sliding groove and is fixedly connected with the mounting plate, the moving center of the electric push rod and the whole moving track of the moving centers of the two sliding rail assemblies are of a triangular prism structure, the vertical section of the triangular prism at any position forms an obtuse triangle, and the obtuse vertex is located on an output shaft of the electric push rod.

In order to further inhibit the complete machine of the range hood from freely sliding under the will of a non-user and reduce the noise of the complete machine of the range hood, the electric push rod comprises a push rod motor, a worm gear and a screw rod used as an output shaft of the electric push rod, the push rod motor transmits the output to the screw rod through the worm gear and the screw rod, and the screw rod extends in the front-back direction.

In order to form a closed connecting structure and effectively avoid the risk that the whole range hood drops, the bottom of the moving part comprises an annular shaft sleeve, and the shaft sleeve is sleeved on the periphery of the screw rod and is in threaded fit with the screw rod.

In order to automatically control the movement of the range hood according to actual cooking conditions, the range hood further comprises an induction device used for detecting the oil smoke environment and controlling the electric push rod, and the induction device is arranged at the bottom of the front side of the smoke collecting hood.

In order to facilitate the installation of the range hood, the range hood further comprises a mounting plate which is used for being fixedly connected with the installation foundation, the first slide rail is arranged on the bottom surface of the mounting plate, and the moving part is fixedly connected with the mounting plate.

In order to facilitate air outlet of the fan system and further avoid forward overturning of the whole range hood, the fan system is provided with a fan air outlet, an air outlet cover is arranged at a position above the box body corresponding to the fan air outlet, a first through hole is formed in the hanging support plate, the air outlet cover upwards penetrates through the first through hole, and the width of the first through hole in the front-back direction is larger than that of the air outlet cover.

In order to ensure that the range hood keeps flexible connection with the outside all the time when moving back and forth, the end part of the air outlet cover penetrating through the hanging support plate is connected with a smoke exhaust pipe, and the smoke exhaust pipe is a flexible aluminum foil pipe.

For improving oil absorption cigarette efficiency, realize directly inhaling directly and directly arranging, set up the air intake on the collection petticoat pipe, the fan system includes the spiral case, sets up the impeller in the spiral case and is used for driving the rotatory motor of impeller, be formed with the fan air intake on the spiral case, the fan air intake makes the fan system become horizontal arrangement down, the air intake on fan air intake and the collection petticoat pipe is just to setting up.

Compared with the prior art, the invention has the advantages that: the whole range hood moves back and forth, so that a power center (a source generating negative pressure) and a smoke gathering area of a fan system move back and forth, the actual oil smoke state of a user during cooking can be flexibly responded, the final range hood effect is improved on the basis of performance parameters such as the rotating speed of the range hood is not improved (under the same condition of other conditions, the noise is inevitably increased by improving the rotating speed), and the comfort, the adaptability and the flexibility of the range hood are greatly improved; meanwhile, the moving mode can keep the cabinet door closed state of the upper cabinet of the cabinet while taking the actual oil fume absorption effect of a user into account, the situation that the upper cabinet door of the cabinet cannot be closed or detached structurally for installing the oil fume absorption machine is avoided, and various aesthetic requirements of the user on the kitchen cabinet are met.

Drawings

Fig. 1 is a schematic view (against a wall) of an installation state of a range hood according to an embodiment of the present invention;

fig. 2 is a sectional view (front-rear section) of a range hood according to an embodiment of the present invention in an installation state;

fig. 3 is an exploded schematic view of a range hood according to an embodiment of the present invention;

fig. 4 is a sectional view (left-right direction section) of the range hood according to the embodiment of the present invention;

FIG. 5 is a schematic view of a portion of a moving mechanism of the range hood according to the embodiment of the present invention;

fig. 6 is a schematic view of a moving part of a moving mechanism of a range hood according to an embodiment of the present invention;

fig. 7 is a schematic view (moved forward) of the installation state of the range hood according to the embodiment of the present invention.

Detailed Description

The invention is described in further detail below with reference to the accompanying examples.

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar functions.

In the description of the present invention, it is to be understood that the terms "central," "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 are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

Referring to fig. 1 to 4, a range hood is installed above a cooking bench 100, four cooking holes 101 are provided on the cooking bench 100, two cooking holes are arranged in a group at intervals in the left-right direction, and two groups of cooking holes 101 are arranged in the front-back direction at intervals to form a four-hole range.

The range hood comprises a smoke collecting hood 1, a box body 2, a fan system 3 arranged in the box body 2 and an air outlet hood 4 arranged at an air outlet of the fan system 3, wherein the air outlet hood 4 extends into the cabinet upper cabinet 200 from the lower part of the cabinet upper cabinet 200, a smoke exhaust pipe 5 is connected with the air outlet hood 4, and the smoke sucked by the fan system 3 can be exhausted to a public flue through the smoke exhaust pipe 5.

An upwards sunken smoke collecting cavity 11 is formed on the inner side of the smoke collecting cover 1, the periphery of the smoke collecting cover 1 is connected to the bottom of the box body 2, and the smoke collecting cavity 11 extends into the box body 2. An air inlet 12 is arranged on the smoke collecting cover 1, such as the top of the smoke collecting cavity 11, and a filter screen 13 can be arranged at the air inlet 12. The front side of the box body 2 is provided with a detachable front panel 21, and the front panel 21 is provided with a control panel 22 so as to operate the range hood.

The fan system 3 is arranged in the box body 2 and above the smoke collecting cavity 11. The fan system 3 is preferably a centrifugal fan, and includes a volute 31, an impeller 32 disposed in the volute 31, and a motor 33 for driving the impeller 32 to rotate, a fan inlet 311 and a fan outlet 312 are formed on the volute 31, in this embodiment, the fan inlet 311 faces downward so that the fan system 3 is arranged horizontally, the fan inlet 311 is disposed opposite to the air inlet 12 on the smoke collection hood 1, and the motor 33 is disposed above the impeller 32 and its output shaft extends longitudinally. At the stage of the fan air outlet 312, the volute casing 31 is connected with the air outlet housing 4 after guiding the horizontal outlet air in the vertical direction through the large-radian curved surface, and the radius of the curved surface is greater than or equal to the thickness (the longitudinal dimension) of the fan system 3.

Therefore, the smoke collecting hood 1 and the fan system 3 are fixedly connected with the box body 2 to form a whole and can be synchronously synchronized.

A hanging plate 6 is arranged between the top of the box body 2 and the bottom of the cabinet upper cabinet 200, and the hanging plate 6 is fixedly connected with the bottom of the cabinet upper cabinet 200. The hanging plate 6 has a length in the left-right direction substantially equal to that of the box body 2 and a width substantially equal to that of the cabinet upper 200. The hanging and supporting plate 6 is fixed at the bottom of the cabinet upper 200 from bottom to top during installation. The hanging support plate 6 is provided with a first through hole 61, the bottom of the cabinet upper cabinet 200 is provided with a second through hole 201, the first through hole 61 corresponds to the second through hole 201 in position, the air outlet hood 4 can sequentially penetrate through the first through hole 61 and the second through hole 201 to enter the cabinet upper cabinet 200 so as to be connected with the smoke exhaust pipe 5, and the smoke exhaust pipe 5 is preferably a flexible aluminum foil pipe. The first through hole 61 and the second through hole 201 are rectangular in the present embodiment, and have a width in the front-rear direction larger than that of the outlet housing 4, so that the outlet housing 4 can move back and forth with the cabinet 2 relative to the hanging plate 6 and the cabinet upper 200. The power line connector of the fan system 3 can also penetrate through the first through hole 61 and can move along with the fan system 3 relative to the hanging plate 6. Before the whole range hood is installed, redundant materials at the bottom of the upper cabinet 200 of the cabinet can be conveniently cut off according to the extension edge of the first through hole 61 on the hanging and carrying plate 6, so that a corresponding second through hole 201 is formed.

In order to avoid the structural interference between the range hood and the upper cabinet 200 of the cabinet when the range hood moves, wherein the most important characteristic of the range hood is that the top surface is relatively flat, in this embodiment, the fan system 3 is placed in the box body 2, only the air outlet cover 4 and the power line structure are protruded on the top surface, and the air outlet cover 4 is located at a position behind the top surface of the range hood.

Referring to fig. 3, the movement mechanism includes a slide rail assembly 71, wherein the slide rail assembly 71 includes a first slide rail 711 and a second slide rail 712 which are slidably engaged with each other, and the slide rail assembly 71 extends in the front-rear direction, so that the second slide rail 712 can slide in the front-rear direction relative to the first slide rail 711. In order to reduce the actual installation time and the installation difficulty, the bottom surface of the hanging and carrying plate 23 is preset with positioning points, the first sliding rail 711 is installed on the bottom surface of the hanging and carrying plate 6 in advance, the sliding rail assemblies 71 have two sets, the first sliding rails 711 of the two sets of sliding rail assemblies 71 are respectively located on the left side and the right side of the bottom surface of the hanging and carrying plate 6, and the first sliding rails 711 are also located on the left side and the right side of the first through hole 61. The second sliding rails 712 are installed on the outer side of the top of the box body 2, and are respectively in sliding fit with the first sliding rails 711 at corresponding positions.

In the installation stage, firstly, the whole range hood is lifted, so that the second slide rail 712 on the box body 2 is matched with the first slide rail 711 on the bottom surface of the mounting plate 6 to slide in, the range hood can be preassembled at the bottom of the upper cabinet 200, then the upper cabinet 200 is opened, the air outlet cover 4 is installed from top to bottom, the air outlet cover 4 is limited to move back and forth only at two through holes by the connection between the air outlet cover 4 and the box body 2 of the range hood, and the range hood 4 can be prevented from accidentally slipping forwards to cause the range hood to fall. And finally, connecting one end of a smoke exhaust pipe 5 with the air outlet housing 4, and connecting the other end of the smoke exhaust pipe with an external outlet, wherein the external outlet is generally an external wall outlet or a public flue and the like. The smoke exhaust pipe 5 is a flexible aluminum foil pipe, so that the range hood is ensured to be flexibly connected with the outside all the time when moving back and forth.

The use of the sliding rail assembly 71 enables the range hood to move back and forth, but in actual installation, after the fan system 3, preferably a centrifugal fan, is used, the gravity center of the whole range hood cannot be completely centered, the sliding rail assembly 71 is difficult to be installed absolutely horizontally due to the uneven bottom of the cabinet 200, and other factors, the simple use of the sliding rail assembly 71 can cause the front and back direction of the whole range hood to lack necessary limit constraints, and the whole range hood can be caused to slide in the front and back direction under the will of a non-user.

Therefore, in the present invention, the electric push rod 72 is used as a driving device of the movement mechanism to realize the front and back positioning movement of the range hood. The telescopic motion direction of the electric push rod 72 is parallel to the motion direction of the two side sliding rail assemblies 71, and both are in the front-back direction. In order to ensure that the range hood can be in a stable state in the moving process, the electric push rod 72 is installed on the inner side of the top of the box body 2 of the range hood, so that the whole moving track of the moving center A of the electric push rod 72 and the moving centers B of the two slide rail assemblies 71 is a triangular prism three-dimensional structure, referring to a dotted line shadow area shown in fig. 4, a vertical section of a rhomboid C at any position forms an obtuse triangle, an obtuse vertex is positioned on an output shaft (the moving center is positioned on an axis) of the electric push rod 72, a structural surface of the obtuse triangle forms a relatively stable structure relative to a structure of a line of two points, meanwhile, under the premise of not interfering with other structures, the electric push rod 72 can be installed at any position on a horizontal line of the obtuse vertex, the stability is consistent, namely, on the basis of ensuring that the three moving centers, the electric push rod 72 may be positioned at any position in the horizontal direction.

Referring to fig. 3 to 6, the moving mechanism further includes a moving member 73 provided on the output shaft of the electric push rod 72. The sliding groove 23 is formed in the top of the box body 2, the sliding groove 23 extends in the front-rear direction, the top of the moving part 73 upwards penetrates through the sliding groove 23 and is fixedly connected with the hanging plate 6, and the box body 2 can slide back and forth relative to the moving part 73 through the sliding groove 23, so that the whole range hood moves back and forth. In order to make the installation process flexible, the moving part 73 is provided with a screw hole 731, the mounting plate 6 is provided with a screw through hole 62 corresponding to the screw hole 731, and the screw through hole 62 needs to be opened at the bottom before the mounting plate 6 is installed at the bottom of the cabinet upper 200. When the range hood is preassembled at the bottom of the cabinet 200, the entire position of the range hood is manually slid by the slide rail assembly 71, so that the screw through hole 62 on the mounting plate 6 is aligned with the screw hole 731 of the moving part 73. After the screw 63 is locked, the moving part 73 is tightly connected with the mounting plate 6. Then, the control board 22 on the front panel 21 of the range hood controls the electric push rod 72 on the range hood to send an instruction, so that the electric push rod 72 drives the whole range hood to move back and forth on the sliding rail assembly 71.

In order to avoid the occurrence of sliding locking, a sliding gap inevitably exists between the first sliding rail 711 and the second sliding rail 712. Meanwhile, the operating principle of the range hood is that a centrifugal impeller with high rotating speed sucks oil smoke. If the whole range hood is only installed through the sliding rail assembly 71, the installation is loose because the sliding part is not restrained, and the noise of the whole range hood is further expanded. The electric push rod 72 can make the user move the range hood more easily, and completely avoid the free sliding of the range hood without the teaching of the user, and simultaneously greatly improve the moving precision.

The electric push rod 72 includes a push rod motor 721, a worm gear 722, and a screw rod 723, an output shaft of the push rod motor 721 transmits an output to the screw rod 723 through a worm gear 722 structure, and the screw rod 723 extends in the front-rear direction as an output shaft of the electric push rod 72. Specifically, a worm is arranged on an output shaft of the push rod motor 721, a worm wheel is meshed with the worm, and the screw rod 723 and the worm wheel are coaxially connected. The screw 723 is rotatably disposed in the housing 724, and the housing 724 is fixedly connected to the case 2. The bottom of the moving component 73 comprises an annular shaft sleeve 732, the inner periphery of the shaft sleeve 732 is provided with internal threads, the shaft sleeve 732 is sleeved on the outer periphery of the screw rod 723 and is in threaded fit with the screw rod 723, so that when the screw rod 723 rotates, the screw rod 723 moves back and forth relative to the moving component 73 due to the relative fixation of the moving component 73, and the electric push rod 72 is fixed on the inner side of the box body 2, so that the box body 2, namely the whole range hood, is driven to move back and forth.

The worm gear 722 has the following advantages: 1. can obtain a great transmission ratio and is more compact than a staggered shaft helical gear mechanism. 2. The two wheels are in line contact with each other between the meshing tooth surfaces, and the bearing capacity of the mechanism is greatly higher than that of a staggered shaft helical gear mechanism; 3. the worm transmission is equivalent to spiral transmission and is multi-tooth meshing transmission, so that the transmission is stable and the noise is low; 4. the mechanism has self-locking property, when the lead angle of the worm is smaller than the equivalent friction angle between the teeth of the meshing wheel, the mechanism has self-locking property, and can realize reverse self-locking, namely, only the worm drives the worm wheel, but not the worm is driven by the worm wheel. Due to the use of the worm gear 72 structure, the moving part 73 and the electric push rod 72 move in a threaded fit manner. The range hood completely inhibits the whole range hood from freely sliding under the condition of no intention of a user, and meanwhile, the whole range hood is stabilized, and the noise of the whole range hood is further reduced.

Meanwhile, the whole range hood can be firmly fixed below the hanging support plate 6 due to the addition of the electric push rod 72, so that the risk of falling of the whole range hood is avoided. The reason is that the matching of the shaft sleeve 732 of the moving part 73 and the output shaft (the screw rod 723) of the electric push rod 72 belongs to a closed structure. The sliding track assembly 71 is of a C-wrap configuration and still of an open design. Because of the effects of manufacturing process, installation accuracy and various stresses in the later period in the actual installation process, the risk of derailment is inevitably existed only by relying on the open structure. And the electric push rod 72 just compensates for this risk. The enclosed construction of the shaft and sleeve ensures that the moving member 73 can still grip the lead screw 723 when the slide assembly 71 is released. Because the screw rod 723 is installed in the electric push rod 72 and cannot be loosened, the electric push rod 72 is installed in the whole range hood and cannot be loosened. And the moving part 73 is fastened below the hanging and carrying plate 6 through a plurality of screws, thereby effectively avoiding the risk that the whole range hood falls off.

In order to enable the whole range hood to automatically judge the oil smoke environment according to the actual condition of a user's house and then electrically move, the induction device 8 is further arranged at the bottom of the front side of the smoke collecting cover 1, and the induction device 8 and the electric push rod 72 are electrically connected to the control board 22 of the range hood. The sensing device 8 can be selected in various types, such as a temperature sensor for detecting the temperature of the oil smoke generated by the cooker; or an infrared sensor is used for detecting the concentration of the actually generated oil smoke and the like.

Preferably, the sensing device 8 is arranged at a left-right central position, in this embodiment, taking a temperature sensor as an example, referring to fig. 2, a sensing area of the temperature sensor is divided into a front area and a rear area, and a front side area Q1 is an area where an included angle β is formed by the sensing device 8 vertically downward and outward; the rear region Q2 is the region of the induction device 8 that is angled vertically downwards and inwards by an angle α. Under the condition of a specified installation height, the front-back depth S2 of the rear side area Q2 on the cooking bench 100 is more than or equal to the depth of the range hood plus the front-back movement distance of the range hood, and the front-back depth S1 of the front side area Q1 on the cooking bench 100 is more than or equal to the front-back movement distance of the range hood. Since the temperature of the oil smoke is high, the temperature detection result can be used as the determination condition.

In the initial installation state, the whole body of the extractor hood body 2 is located below the upper cabinet 200 of the cabinet, see fig. 1. When the front side region Q1 detects a higher temperature than the inner side region Q2, it can be determined that the front side region Q1 has more oil smoke, and the range hood automatically moves forward, see fig. 7. When the rear area Q1 detects a higher temperature, it can be determined that the center of gravity of the oil smoke is inside, and the whole range hood moves (backwards) toward the back wall 300 through signal feedback. The range hood is ensured to be always positioned above the heating source with the highest temperature, and the range hood is ensured to cover the oil smoke area to the maximum extent to improve the oil smoke absorption effect.

Compare than traditional lampblack absorber, traditional fan system generally arranges the position that range hood is more leaned on the back in, therefore fan system also generally more leaned on the back as the source that provides the negative pressure, therefore traditional range hood can provide great amount of wind index under test condition, nevertheless in the in-service use because of pressure is comparatively leaned on the back, at the range hood front end, also is that the suction in user operation region is obvious not enough exactly, leads to relatively poor experience and feels.

Certainly, when the problem that the front end smoke gathering capacity of the traditional range hood is insufficient is solved, the method of increasing the depth is generally adopted, so that the front end face of the range hood is far away from the back wall 300, but the method plays a little role in smoke gathering, and due to the fact that suction force generated by enough negative pressure is not available, the oil smoke still has a high probability of escaping. But this scheme not only can be free the selection hold up the position of cigarette, and along with the removal of position, the source of negative pressure also moves along with, has promoted the ability of inhaling oil smoke greatly.

The traditional range hood still has a problem when increasing the depth and just causes the collision risk easily, often has more than one user to use range hood in the actual culinary art moreover, because the user of different heights also has different demands to range hood. The invention can enable the user to independently adjust the front and back depth of the range hood, thereby greatly reducing the head collision risk of the user and improving the satisfaction degree of the user.

Meanwhile, unlike the conventional range hood, the range hood of the present invention can move the suction port and the center of the fan at the same time to ensure that the smoke collecting cavity 12 holds up the oil smoke and simultaneously maintains sufficient negative pressure to suck the oil smoke into the fan system 3.

Claims (10)

1. The utility model provides a range hood, includes collection petticoat pipe (1), box (2) and sets up fan system (3) in box (2), collection petticoat pipe (1) and box (2) are connected fixedly, its characterized in that: the range hood further comprises a moving mechanism, the moving mechanism comprises a sliding rail assembly (71), the sliding rail assembly (71) comprises a first sliding rail (711) which can be fixedly connected with an external installation base and a second sliding rail (712) which is installed on the outer side of the top of the box body (2), and the first sliding rail (711) and the second sliding rail (712) are in sliding fit to enable the box body (2) to move back and forth.

2. The range hood of claim 1, wherein: the movement mechanism further comprises an electric push rod (72) serving as a driving device and a movement part (73) which can be fixedly connected with an external installation base, the electric push rod (72) is fixedly connected with the box body (2), and the movement part (73) is arranged on an output shaft of the electric push rod (72).

3. The range hood of claim 2, wherein: electric putter (72) set up at box (2) top inboard, sliding tray (23) have been seted up at the top of box (2), sliding tray (23) extend in the front and back direction, the top of moving part (73) upwards passes sliding tray (23) and can be connected fixedly with outside installation basis, the whole movement track of movement center (A) of electric putter (72) and the movement center (B) of two slide rail set spares (71) is a triangular prism structure, the vertical cross-section of rhombus at the optional position constitutes an obtuse triangle, and the obtuse vertex is located the output shaft of electric putter (72).

4. The range hood of claim 3, wherein: the electric push rod (72) comprises a push rod motor (721), a worm gear (722) and a screw rod (723) serving as an output shaft of the electric push rod (72), the push rod motor (721) transmits output to the screw rod (723) through the worm gear (722), and the screw rod (723) extends in the front-rear direction.

5. The range hood of claim 4, wherein: the bottom of the moving component (73) comprises an annular shaft sleeve (732), and the shaft sleeve (732) is sleeved on the periphery of the screw rod (723) and is in threaded fit with the screw rod (723).

6. The range hood according to any one of claims 2 to 5, wherein: the range hood further comprises an induction device (8) used for detecting the oil smoke environment and controlling the electric push rod (72), and the induction device (8) is arranged at the bottom of the front side of the smoke collecting hood (1).

7. The range hood according to any one of claims 2 to 5, wherein: the mounting base is used for being fixedly connected with a mounting plate (6), the first sliding rail (711) is arranged on the bottom surface of the mounting plate (6), and the moving part (73) is fixedly connected with the mounting plate (6).

8. The range hood of claim 7, wherein: fan system (3) have fan air outlet (312), the position that box (2) top and fan air outlet (312) correspond is provided with out fan housing (4), hang and seted up first through-hole (61) on support plate (6), it upwards passes first through-hole (61) to go out fan housing (4), the ascending width in first through-hole (61) fore-and-aft direction is greater than out fan housing (4).

9. The range hood of claim 8, wherein: the end part of the air outlet cover (4) penetrating through the hanging support plate (6) is connected with a smoke exhaust pipe (5), and the smoke exhaust pipe (5) is a flexible aluminum foil pipe.

10. The range hood according to any one of claims 1 to 5, wherein: set up air intake (12) on collection petticoat pipe (1), fan system (3) include spiral case (31), set up impeller (32) in spiral case (31) and be used for driving motor (33) that impeller (32) are rotatory, be formed with fan air intake (311) on spiral case (31), fan air intake (311) make fan system (3) become horizontal arrangement down, fan air intake (311) are just to setting up with air intake (12) on the collection petticoat pipe (1).

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