Air duct, air duct assembly, smoke guide stove and air curtain machine

Abstract

The embodiment of the present invention discloses an air duct, an air duct group, a smoke guide stove and an air curtain machine, wherein the air duct comprises an outer tube, a rotatable object is arranged inside the outer tube, the rotation axis of the rotatable object is parallel to the length direction of the outer tube, one or more closed cavities are formed between the rotatable object and the inner wall of the outer tube; an air outlet slot is opened on the outer tube along the length direction of the outer tube. The air duct of the present invention has uniform air outlet and simple structure; the air curtain machine of the present invention has high energy efficiency ratio and small size; the smoke guide stove of the present invention has more uniform air outlet.

Description

Technical Field

[0001] The present invention relates to the technical field of building heating and ventilation, and in particular to an air guide duct, an air guide duct group, a smoke guide stove and an air curtain machine. Background Art

[0002] Air curtains are widely used in the building HVAC industry. Crossflow fans are now mostly used as wind sources. Due to structural reasons, the energy efficiency ratio of crossflow fans is only 20~30%, which is much lower than that of axial flow fans and centrifugal fans. In addition, crossflow fans are large in size, difficult to install and occupy a large space. On the other hand, the existing smoke guide uses air ducts without air storage devices. When in use, due to the characteristics of gas flow, the wind force is greater at the end close to the air inlet, and as the distance from the air inlet increases, the air volume and wind pressure gradually weaken, making it difficult to achieve a longer air curtain, or the wind force is too strong near the air inlet and too weak at the end far from the air inlet, resulting in poor user experience and actual effects. Summary of the invention

[0003] The technical problem to be solved by the embodiments of the present invention is to provide an air guide duct, an air guide duct group, a smoke guide stove and an air curtain machine to achieve uniform air outlet, simplify the structure and improve the energy efficiency ratio.

[0004] In order to solve the above technical problems, an embodiment of the present invention proposes an air guide duct, including an outer tube, a rotatable object is provided inside the outer tube, the rotation axis of the rotatable object is parallel to the length direction of the outer tube, and one or more closed cavities are formed between the rotatable object and the inner wall of the outer tube; an air outlet groove is opened on the outer tube along the length direction of the outer tube.

[0005] Furthermore, it also includes a driving mechanism connected to the rotatable object to drive the rotatable object to rotate.

[0006] Furthermore, the driving mechanism is a wind wheel or a motor driving mechanism.

[0007] Furthermore, an air guide plate is provided at the corresponding air outlet slot inside or outside the outer tube.

[0008] Furthermore, the outer tube is provided with an outer cover corresponding to the air outlet slot and capable of being opened / closed.

[0009] Furthermore, the rotatable object is an arc plate.

[0010] Furthermore, the rotatable object is a vane group, and the vane group is composed of a plurality of vanes distributed circumferentially around the rotation axis.

[0011] Correspondingly, an embodiment of the present invention further provides an air duct group, comprising a plurality of the above-mentioned air ducts, wherein the plurality of air ducts are connected in sequence at preset angles, each air duct supplies air individually or at one end, and the rotatable objects of each air duct are linked via a transmission pair.

[0012] Correspondingly, an embodiment of the present invention further provides a smoke guide cooker, comprising the above-mentioned air guide duct group.

[0013] Correspondingly, an embodiment of the present invention further provides an air curtain machine, comprising the above-mentioned air guide duct, wherein the air guide duct is connected to an axial flow fan or a centrifugal fan.

[0014] The beneficial effects of the present invention are as follows: the air guide duct of the present invention has uniform air discharge and a simple structure; the air curtain of the present invention has high energy efficiency and a small size; and the smoke guide stove of the present invention has more uniform air discharge. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional structural diagram of the air guide duct of Example 1 of the present invention.

[0016] Figure 2 It is an exploded view of the air duct of Example 1 of the present invention.

[0017] Figure 3 It is a partial cross-sectional view of the air guide duct of Example 1 of the present invention.

[0018] Figure 4 It is a three-dimensional structural diagram of the air duct of Example 2 of the present invention.

[0019] Figure 5 It is a partial cross-sectional view of the air duct of Example 2 of the present invention.

[0020] Figure 6 It is an exploded view of the air duct of Example 2 of the present invention.

[0021] Figure 7 It is a three-dimensional structural diagram of the air duct of Example 3 of the present invention.

[0022] Figure 8 1 is a diagram showing the internal structure of the air duct according to Embodiment 3 of the present invention.

[0023] Fig. 9 It is a cross-sectional view of the rotatable object of the air duct of Example 3 of the present invention when it is rotated to different angles.

[0024] Fig.10 It is a three-dimensional structural diagram of the air guide duct group according to an embodiment of the present invention.

[0025] Description of Figure Numbers

[0026] Figure 1 to Figure 3 In the middle, the outer tube 10, the air outlet slot 11, the end cover 12, the wind wheel 20, the arc plate 30, the ventilation slot 31;

[0027] Figures 4 to 6 In the middle, the outer tube 10, the air outlet slot 11, the end cover 12, the outer cover 13, the base 14, the wind wheel 20, the wing group 30, the wing clip 31, and the partition 32;

[0028] Figure 7 to Figure 9 In the middle, the outer tube 10, the air outlet slot 11, the end cover 12, the wind wheel 20, the wing group 30, the wing clip 31, and the partition 32;

[0029] Fig.10 Middle, air duct 1. DETAILED DESCRIPTION

[0030] It should be noted that, in the absence of conflict, the embodiments in the present application and the features in the embodiments may be combined with each other. The present invention will be further described in detail below in conjunction with the drawings and specific embodiments.

[0031] In the embodiments of the present invention, if there are directional indications (such as up, down, left, right, front, back, etc.), they are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0032] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0033] The air duct of the embodiment of the present invention includes an outer tube. A rotatable object is provided in the outer tube, and the rotation axis of the rotatable object is parallel to the length direction of the outer tube, and one or more closed cavities are formed between the rotatable object and the inner wall of the outer tube. An air outlet groove is provided on the outer tube (preferably along the length direction of the outer tube). When the rotatable object rotates in the outer tube, the closed cavity accumulates wind, and when it turns to the air outlet groove, the wind is discharged from the air outlet groove, realizing the accumulation-release cycle of wind force. When the rotatable object rotates at a high speed, the cycle frequency is also very high. Due to the characteristics of the air flow, the generated wind curtain has strong and weak cycles, but will not be interrupted. Preferably, the air duct also includes a driving mechanism connected to the rotatable object to drive the rotatable object to rotate. When the air duct of the embodiment of the present invention is used as a single tube, the driving mechanism is arranged at one end of the outer tube, and the other end of the outer tube is sealed by an end cover.

[0034] As an implementation mode, the driving mechanism is a wind wheel, and the rotatable object is an arc plate (a ventilation slot is formed between two ends of the arc plate). The wind wheel is composed of blades and a hub.

[0035] Example 1, as an implementation method, the rotatable object is an arc plate. Figure 1 to Figure 3 As shown, the air guide pipe of the embodiment of the present invention comprises an outer pipe, a wind wheel, an arc plate, and an end cover, wherein the wind wheel is composed of blades and a hub.

[0036] Among them, the wind wheel and the arc plate can rotate freely in the outer tube. When working, the external wind is input from the wind wheel end of the outer tube, blowing the blades of the wind wheel, which can drive the wind wheel and the arc plate to rotate. When the arc plate blocks the air outlet slot, the outer tube can accumulate wind force. When the arc plate does not block the air outlet slot, the wind force accumulated in the outer tube is released simultaneously in the length direction of the entire air outlet slot.

[0037] The gap between the outer wall of the arc plate and the inner wall of the outer tube is small, and still air is carried between the tube walls due to capillary action. When the wind wheel and the arc plate rotate at high speed, when the arc plate blocks the air outlet slot, the outer tube can accumulate wind force, and the air leaked from the outer wall of the arc plate and the inner wall of the outer tube can be ignored; when the arc plate does not block the air outlet slot, the wind force accumulated in the outer tube is released simultaneously along the length direction of the entire air outlet slot, thereby realizing the cycle of accumulating and releasing wind force.

[0038] Example 2, as an implementation method, the rotatable object is a vane group, and the vane group is composed of a plurality of vanes distributed circumferentially around the rotation axis. Preferably, the rotatable object also includes a vane clamp for fixing the vanes of the vane group, and the vane clamp prevents the vanes of the vane group from deforming. A partition is provided at one end of the outer tube connected to the drive mechanism. The vane group and the partition divide the outer tube into two half areas: a wind accumulation area and a wind outlet area. Figures 4 to 6 As shown, the air guide duct of the embodiment of the present invention includes a wind wheel, a wing group, a wing clamp, an outer tube, a partition, an outer cover, an end cover, and a base. The wind wheel, the wing group and the wing clamp are combined into one body, and the partition is fixed on the outer tube. When in use, the blades on the wind wheel are blown by the wind, driving the wing group and the wing clamp to rotate together. During operation, from the cross-section of the outer tube, the wing group and the partition divide the outer tube into two halves, a wind accumulation area and a wind outlet area. Together with the rotation of the wing group, a wind accumulation-release cycle is realized. The outer cover is used to prevent dust, guide wind, and prevent liquids and insects from entering. It is opened when in use and closed when not in use. The base is used for support. The end cover is used for sealing.

[0039] Example 3, as an implementation method, the cross section of the outer tube is circular, square or other polygonal. When it is square or other polygonal, the wings of the wing group are made of elastic material, and the wings will deform when rotating in the outer tube, and the cross section of some wings is curved. Figure 7 to Figure 9 As shown, the air guide duct of the embodiment of the present invention includes a wind wheel, a vane group, a vane clamp, an outer tube, a partition, and an end cover. The wind wheel, the vane group, and the vane clamp are combined into one body, and the partition is fixed on the outer tube. When in use, the blades on the wind wheel are blown by the wind, driving the vane group and the vane clamp to rotate together. Among them, the combination of the wind wheel, the vane group, and the vane clamp has a rotation axis that does not coincide with the center line of the cross-section of the outer tube. During operation, when looking at the space enclosed by the vanes and the inner wall of the outer tube from the cross-section of the outer tube, the vane group and the partition divide the inner space of the outer tube into three parts: a wind storage area, a compression area, and an air outlet area. Fig. 9The lower part of the dotted line is the air accumulation area. As the vane group rotates, the air in the accumulation area moves to the upper left corner of the inner space of the outer tube. As the space decreases, the air volume decreases and the pressure increases. When the vanes of the vane group move to the air outlet slot, the air is released, realizing the "accumulation-compression-release" cycle of air.

[0040] Please refer to Fig.10 The air duct group of the embodiment of the present invention includes a plurality of air ducts. The plurality of air ducts are connected end to end at a preset angle, and each air duct supplies air independently or the rotatable objects of each air duct are linked by a transmission pair. One end of the air duct group is connected to the driving mechanism, and the other end is sealed ( Fig.10 The sealing cover at the middle end is not shown). The transmission pair can be a gear transmission pair. The air ducts of the air duct group supply air uniformly or individually and are arranged around the cooking area of ​​the stove. When they are working, they can form an air curtain around the cooking area of ​​the stove to prevent the cooking fumes from escaping and allow the fumes to be sucked away by the range hood as much as possible.

[0041] The smoke guide stove of the embodiment of the present invention comprises an air guide duct group. The air guide duct group can be attached to the periphery of the stove panel of a common gas stove, an induction cooker, etc., and become one with the stove to form the smoke guide stove of the embodiment of the present invention.

[0042] The air curtain machine of the embodiment of the present invention comprises an air duct, wherein the air duct is connected to an axial flow fan or a centrifugal fan. The axial flow fan or the centrifugal fan drives the rotatable object to rotate, thereby generating an uninterrupted and strong and weak cycle air curtain.

[0043] In order to reduce vibration and noise during operation, the rotating body can be dynamically balanced and counterweights can be added at some locations. This method is widely used in the fan industry and does not need to be explained in detail here.

[0044] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An air duct, characterized in that: The outer tube comprises an outer tube, a rotatable object is arranged inside the outer tube, the rotation axis of the rotatable object is parallel to the length direction of the outer tube, and one or more closed cavities are formed between the rotatable object and the inner wall of the outer tube; an air outlet slot is opened on the outer tube along the length direction of the outer tube; The air guide duct also includes a driving mechanism connected to the rotatable object to drive the rotatable object to rotate; The driving mechanism is a wind wheel or a motor driving mechanism; When the rotatable object rotates in the outer tube, the closed cavity accumulates wind, and when it rotates to the air outlet slot, the wind is discharged from the air outlet slot, thus realizing the cycle of wind accumulation and release.

2. The air guide duct according to claim 1, characterized in that: An air guide plate is arranged at the corresponding air outlet slot inside or outside the outer tube.

3. The air guide duct according to claim 1, characterized in that: The outer tube is also provided with an outer cover corresponding to the air outlet slot and can be opened / closed.

4. The air guide duct according to claim 1, characterized in that: The rotatable object is an arc plate.

5. The air guide duct according to claim 1, characterized in that: The rotatable object is a vane group, which is composed of a plurality of vanes distributed circumferentially around a rotation axis.

6. An air duct assembly, characterized in that: It comprises a plurality of air ducts as described in any one of claims 1 to 5, wherein the plurality of air ducts are connected in sequence at preset angles, each air duct supplies air independently or at one end, and the rotatable objects of the air ducts are linked via a transmission pair.

7. A smoke-conducting stove, characterized in that: It comprises the air guide duct assembly as described in claim 6.

8. An air curtain machine, characterized in that: It comprises the air guide duct as claimed in any one of claims 1 to 5, wherein the air guide duct is connected to an axial flow fan or a centrifugal fan.

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