Adjustable airflow system for the oven

Abstract

This invention discloses an adjustable air supply system for an oven, including a distribution box with a spaced-out air inlet channel and an air outlet channel. The bottom wall of the air inlet channel has an air inlet hole, and the bottom wall of the air outlet channel has a return air hole. An air nozzle structure is connected to the distribution box and communicates with the corresponding air inlet hole. Return air channels are provided on both sides of the air nozzle structure, connecting the return air hole and the air nozzle structure. An airflow regulating valve is provided at the air inlet hole to regulate the airflow entering the air nozzle structure from the air inlet channel via the air inlet hole. In this way, the airflow entering the air nozzle structure through the air inlet hole can be adjusted according to different drying processes, thereby meeting the requirements of different drying processes.

Description

Technical Field

[0001] This invention relates to the field of air supply system technology, and more specifically to an adjustable air supply system for an oven. Background Technology

[0002] In the lithium battery industry, electrode drying is carried out in tunnel furnaces. Drying mainly requires two conditions: a continuous heat source and airflow to reduce the saturation concentration difference.

[0003] Once an oven is designed and manufactured into a finished product, its internal airflow structure is fixed, and related parameters cannot be adjusted during subsequent use. However, ovens face variable processes during operation, such as changes in coating speed or drying load. Different processes require significantly different airflow volumes from the oven; however, because the parameters of the pre-built oven cannot be adjusted, it cannot be adapted to different processes.

[0004] Given the shortcomings of existing ovens, it is necessary to design an adjustable air supply system for ovens. Summary of the Invention

[0005] Therefore, the technical problem to be solved by the present invention is that the relevant parameters of existing finished ovens cannot be adjusted and cannot adapt to various processes, thereby providing an adjustable air supply system for ovens.

[0006] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows:

[0007] An adjustable ventilation system for an oven, comprising:

[0008] The distribution box has an air inlet channel and an air outlet channel that are separated from each other. The bottom wall of the air inlet channel has an air inlet hole, and the bottom wall of the air outlet channel has an air return hole.

[0009] A nozzle structure is connected to the distribution box and communicates with the corresponding air inlet. Return air channels are provided on both sides of the nozzle structure, and these return air channels connect the return air inlet and the nozzle structure.

[0010] An air intake regulating valve is provided at the air intake hole to regulate the air volume entering the nozzle structure from the air intake channel through the air intake hole.

[0011] Furthermore, a return air volume regulating valve is provided at the return air hole to regulate the air volume entering the outlet air channel from the return air channel through the return air hole.

[0012] Furthermore, it also includes an air inlet pipe connected to one end of the distribution box and an air outlet pipe connected to the other end of the distribution box. One end of the air inlet channel is closed and the other end is connected to the air inlet pipe, and one end of the air outlet channel is closed and the other end is connected to the air outlet pipe.

[0013] Furthermore, it also includes an air inlet regulating structure, which is slidably mounted on the distribution box and is disposed near one end of the air inlet channel that connects to the air inlet pipe, so as to regulate the air volume entering the air inlet channel from the air inlet pipe, and / or, it also includes an air outlet regulating structure, which is slidably mounted on the distribution box and is disposed near one end of the air outlet channel that connects to the air outlet pipe, so as to regulate the air volume entering the air outlet pipe from the air outlet channel.

[0014] Furthermore, the nozzle structure is provided with a nozzle pressure equalizing plate, and / or the return air channel is provided with a return air pressure equalizing plate.

[0015] Furthermore, the length extension direction of the nozzle structure is perpendicular to the length extension direction of the air inlet channel.

[0016] Furthermore, there are at least two air inlet channels and at least two air outlet channels, and the air inlet channels and the air outlet channels are arranged alternately side by side.

[0017] Furthermore, the size of the air inlet holes on the bottom wall of the same air inlet channel gradually increases along the air inlet direction.

[0018] Furthermore, the size of the return air hole on the bottom wall of the same air outlet duct gradually decreases along the air outlet direction.

[0019] Furthermore, it also includes a sensor, a control mechanism, and a drive mechanism. The sensor and the drive mechanism are electrically connected to the control mechanism. The sensor is configured as a pressure sensor or a flow sensor. The sensor is installed at one or more locations, including the air inlet, the air return outlet, the inlet of the air inlet channel, and the outlet of the air outlet channel. The control mechanism controls the drive mechanism to move according to the detection signal of the sensor to drive the air volume adjustment structure to move.

[0020] The technical solution of this invention has the following advantages:

[0021] 1. The adjustable air supply system of the oven provided by the present invention has an air inlet hole on the bottom wall of the air inlet channel of the distribution box, and an air nozzle structure connected to the distribution box communicates with the air inlet hole. An air inlet volume regulating valve is provided at the position of the air inlet hole. In this way, the air volume entering the air nozzle structure from the air inlet channel through the air inlet hole can be adjusted by the air inlet volume regulating valve, so as to realize the adjustment of the air volume blown to the workpiece to be dried, so as to suit the needs of various drying processes and different drying uniformity requirements.

[0022] 2. The adjustable air supply system of the oven provided by the present invention has a return air hole on the bottom wall of the air outlet channel and a return air volume regulating valve at the return air hole. In this way, the air volume entering the air outlet channel from the return air channel through the return air hole can be adjusted by the return air volume regulating valve. In conjunction with the inlet air volume regulating valve, the vertical air volume in the distribution box can be adjusted, thereby further meeting the needs of various drying processes and different drying uniformity requirements.

[0023] 3. The adjustable air supply system of the oven provided by the present invention has an air inlet adjustment structure at one end connected to the air inlet pipe near the air inlet pipe, and / or an air outlet adjustment structure at one end connected to the air outlet pipe near the air outlet pipe. In this way, the air volume entering the air inlet channel from the air inlet pipe can be adjusted accordingly, so that the air volume entering each air inlet pipe is consistent or the air volume entering the air inlet channel can be adjusted according to actual needs, and / or the air volume entering the air outlet pipe from the air outlet channel can be adjusted accordingly. The setting of the air outlet adjustment structure and the air inlet adjustment structure can realize the adjustment of the horizontal air volume in the oven.

[0024] 4. The adjustable air supply system of the oven provided by the present invention has a return air pressure equalization plate in the return air channel and / or an air nozzle pressure equalization plate in the air nozzle structure, which can further homogenize the airflow through the return air pressure equalization plate and / or the air nozzle pressure equalization plate, thereby further improving the uniformity of airflow and air pressure from the air nozzle to the workpiece to be dried and / or the uniformity of airflow and air pressure from the return air hole into the air outlet channel, and ultimately improving the drying uniformity of the drying surface.

[0025] 5. The adjustable air supply system of the oven provided by the present invention has an air inlet hole size that gradually increases along the air inlet direction on the same air inlet channel, and a return air hole size that gradually decreases along the air outlet direction on the same air outlet channel. In this way, the uniformity of the air inlet pressure entering the corresponding air nozzle structure from each air inlet hole and the uniformity of the return air pressure entering the corresponding air outlet channel from each return air hole can be improved, thereby improving the uniformity of drying of the drying surface. Attached Figure Description

[0026] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0027] Figure 1 This is a three-dimensional structural diagram of the adjustable air supply system of the oven of the present invention;

[0028] Figure 2 This is a front view of the adjustable air supply system of the oven of the present invention;

[0029] Figure 3 This is a top view of the adjustable air supply system of the oven of the present invention;

[0030] Figure 4 This is a schematic diagram showing the cooperation between the nozzle structure, the nozzle pressure equalizing plate, and the return air pressure equalizing plate in this invention.

[0031] Figure 5 for Figure 4 A schematic diagram of the structure without the nozzles and end plates;

[0032] Figure 6 This is a partially enlarged view of the adjustable air supply system of the oven of the present invention, excluding the air inlet pipe.

[0033] Figure 7 Another enlarged view of the adjustable air supply system of the oven of the present invention, with the air inlet pipe and air volume regulating valve removed;

[0034] Figure 8 This is another partially enlarged view of the adjustable air supply system of the oven of the present invention;

[0035] Figure 9 This is a three-dimensional schematic diagram of the nozzle structure in this invention;

[0036] Figure 10 for Figure 9 A three-dimensional schematic diagram after removing the end plates;

[0037] Figure 11 This is a three-dimensional schematic diagram of the nozzle in this invention;

[0038] Figure 12 This is a front view of the nozzle in this invention.

[0039] Explanation of reference numerals in the attached figures:

[0040] 1. Distribution box; 2. Air inlet duct; 21. Air inlet adjustment structure; 22. Air inlet; 3. Air inlet channel; 31. Air inlet hole; 32. Air inlet volume regulating valve; 4. Air nozzle structure; 41. Air cavity; 411. Flow hole; 42. Air nozzle; 43. Air nozzle pressure equalizing plate; 5. Return air channel; 51. Return air pressure equalizing plate; 6. Air outlet channel; 61. Return air hole; 62. Return air volume regulating valve; 7. Air outlet duct; 71. Air outlet adjustment structure; 72. Air outlet; 36. Partition plate. Detailed Implementation

[0041] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0042] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0043] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0044] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0045] Example

[0046] like Figures 1 to 12 As shown, this embodiment provides an adjustable air supply system for an oven, including a distribution box 1, an air inlet pipe 2, an air inlet adjustment structure 21, an air inlet channel 3, an air nozzle structure 4, a return air channel 5, an air outlet channel 6, an air outlet pipe 7, an air outlet adjustment structure 71, an air nozzle pressure equalizing plate 43, and a return air pressure equalizing plate 51.

[0047] The distribution box 1 has at least two parallel and alternately arranged air inlet channels 3 and at least two air outlet channels 6. Each air inlet channel 3 and each air outlet channel 6 is closed at one end and open at the other. Each air inlet channel 3 has at least two air inlet holes 31 on its bottom wall. The positions of the air inlet holes 31 on the bottom walls of different air inlet channels 3 are consistent, so that the line connecting the corresponding air inlet holes 31 on the at least two parallel air inlet channels 3 in the distribution box 1 is perpendicular to the length extension direction of the air inlet channel 3. Each air outlet channel 6 has at least two return air holes 61 on its bottom wall. The positions of the return air holes 61 on the bottom walls of different air outlet channels 6 are consistent, so that the line connecting the corresponding return air holes 61 on the at least two parallel air outlet channels 6 in the distribution box 1 is perpendicular to the length extension direction of the air outlet channel 6. Furthermore, considering that the inlet air pressure gradually decreases along the inlet direction within the inlet channel 3, the size of the inlet hole 31 gradually increases in the inlet direction of the inlet channel 3, and / or, considering that the outlet air pressure gradually decreases along the outlet direction within the outlet channel 6, the size of the return air hole 61 gradually decreases in the outlet direction of the outlet channel 6, so as to correspondingly improve the uniformity of the inlet air pressure entering the nozzle structure 4 through the inlet hole 31 and / or the uniformity of the outlet air pressure entering the outlet channel 6 through the return air hole 61, ultimately improving the drying uniformity of the drying surface. In this embodiment, there are multiple inlet holes 31 and return air holes 61, and adjacent inlet channels 3 and outlet channels 6 are separated by a partition 36. The bottom wall of the inlet channel 3 and the bottom wall of the outlet channel 6 are both the bottom wall of the distribution box 1. Specifically, an air intake volume regulating valve 32 is provided at the air intake hole 31 to regulate the air volume entering the nozzle structure 4 from the air intake channel 3 through the air intake hole 31, and a return air volume regulating valve 62 is provided at the return air hole 61 to regulate the air volume entering the air outlet channel 6 from the aforementioned return air channel 5 through the return air hole 61.

[0048] One end of the distribution box 1 is connected to an air inlet pipe 2, and the other end is connected to an air outlet pipe 7. Both the air inlet pipe 2 and the air outlet pipe 7 have rectangular cross-sections, and the air inlet 22 of the air inlet pipe 2 and the air outlet 72 of the air outlet pipe 7 are located on the same side, which facilitates the arrangement of blower and exhaust equipment. The air inlet direction of the air inlet pipe 2 is perpendicular to the length extension direction of the distribution box 1, and the air outlet direction of the air outlet pipe 7 is perpendicular to the length extension direction of the distribution box 1. That is, both the air inlet pipe 2 and the air outlet pipe 7 are perpendicular to the air inlet channel 3 and the air outlet channel 6. Of course, the air inlet pipe 2 and the air outlet pipe 7 can also be set at a certain angle to the air inlet channel 3 and the air outlet channel 6. The air inlet pipe 2 connects to the open end of the air inlet channel 3, and the air outlet pipe 7 connects to the open end of the air outlet channel 6.

[0049] The distribution box 1 is also equipped with an air inlet regulating structure 21 and / or an air outlet regulating structure 71. The air inlet regulating structure 21 is positioned near the end of the air inlet channel 3 that connects to the air inlet pipe 2, to regulate the airflow entering the air inlet channel 3 from the air inlet pipe 2. In this embodiment, the air inlet regulating structure 21 is slidably mounted on the distribution box 1 and extends into the air inlet channel 3. The air outlet regulating structure 71 is positioned near the end of the air outlet channel 6 that connects to the air outlet pipe 7, to regulate the airflow entering the air outlet pipe 7 from the air outlet channel 6. In this embodiment, the air outlet regulating structure 71 is slidably mounted on the distribution box 1 and extends into the air outlet channel 6. In this embodiment, both the air inlet regulating structure 21 and the air outlet regulating structure 71 are plate-shaped structures; however, they can also be columnar or other shapes, which are not specifically limited here. Figure 2 From this perspective, both the air inlet regulating structure 21 and the air outlet regulating structure 71 can move vertically up and down relative to the bottom wall of the distribution box 1, thereby changing the flow area of ​​the airflow entering the air inlet channel 3 from the air inlet pipe 2, and / or changing the flow area of ​​the airflow entering the air outlet pipe 7 from the air outlet channel 6, thus changing the air volume and air pressure entering the air inlet channel 3 from the air inlet pipe 2, and / or changing the air volume and air pressure entering the air outlet pipe 7 from the air outlet channel 6. Of course, the air inlet regulating structure 21 and the air outlet regulating structure 71 can also be configured to move horizontally back and forth.

[0050] The aforementioned air intake volume regulating valve 32, air intake regulating structure 21, return air volume regulating valve 62, and air outlet regulating structure 71 are collectively referred to as the air volume regulating structure.

[0051] The nozzle structure 4 is connected to the distribution box 1, and there are at least two nozzle structures 4. Figure 4 From this perspective, the front and rear ends of the nozzle structure 4 are sealed by end plates (unmarked). Both sides of the nozzle structure 4 are provided with return air channels 5, which are adjacent to the bottom wall of the outlet air channel 6 and connected to the corresponding return air holes 61. The nozzle structure 4 spans the bottom of multiple inlet air channels 3 within the distribution box 1. In this embodiment, since the bottom wall of the inlet air channel 3 is also the bottom wall of the distribution box 1, it can also be said that the nozzle structure 4 is fixedly connected to the bottom wall of the distribution box 1. In short, regardless of its form, the nozzle structure 4 is always located at the bottom of the distribution box 1. The length extension direction of the nozzle structure 4 is perpendicular to the length extension direction of the air inlet channel 3. Correspondingly, the return air channel 5 spans multiple air outlet channels 6 within the distribution box 1, and the length extension direction of the return air channel 5 is perpendicular to the length extension direction of the air outlet channel 6. Of course, the nozzle structure 4 and the air inlet channel 3 can also be set at an angle, and the return air channel 5 and the air outlet channel 6 can also be set at an angle, but the angle should not be too large. Preferably, the length extension direction of the nozzle structure 4 is perpendicular to the length extension direction of the air inlet channel 3, so that the air pressure of the hot air entering the same nozzle structure 4 will not differ greatly, which is beneficial to the uniform distribution of the impact jet by the nozzle pressure equalizing plate 43 within the nozzle structure 4.

[0052] The nozzle structure 4 includes an air cavity 41 and a nozzle 42 fixed to the side of the air cavity 41 away from the distribution box 1. The air cavity 41 has a rectangular cross-section and a flow hole 411 at the top that is directly opposite to and communicates with the aforementioned air inlet 31. A nozzle equalizing plate 43 is fixedly installed inside the air cavity 41. The nozzle equalizing plate 43 is spaced apart from the top wall of the air cavity 41. The nozzle equalizing plate 43 is a flat plate structure with multiple holes. The installation of the nozzle equalizing plate 43 ensures that the impact jet entering the air cavity 41 from the air inlet 31 on the bottom wall of the air inlet channel 3 through the flow hole 411 will be mixed in the air cavity 41 and buffered and distributed by the nozzle equalizing plate 43 before entering the nozzle 42 in a more uniform manner.

[0053] The following describes the operation of the oven's adjustable convection system:

[0054] Hot air enters the air inlet 22 of the air inlet 2 laterally. Since an air inlet adjustment structure 21 is provided at one end of the air inlet 2 adjacent to the air inlet channel 3, the flow area of ​​the hot air entering the air inlet channel 3 can be changed by altering the vertical distance between the air inlet adjustment structure 21 and the bottom wall of the distribution box 1. This allows for the adjustment of the air volume and pressure of the lateral airflow entering the air inlet channel 3. Here, the air inlet adjustment structure 21 not only ensures that the air volume in each air inlet channel 3 is the same, but even if the air volume in each air inlet channel 3 is the same, it can be adjusted to different values ​​according to actual conditions. Furthermore, it can adjust the air volume according to actual needs. The air volume in different air inlet channels 3 is different. For example, when the horizontal dimension of the part to be dried is small, the air inlet adjustment structure 21 can be used to block part of the air inlet channel 3 and only open part of the air inlet channel 3. When a part to be dried needs to be dried more intensely, the vertical distance between the corresponding air inlet adjustment structure 21 and the bottom wall of the distribution box 1 can be increased so that more hot air can enter the corresponding air inlet channel 3. Conversely, the same adjustment can be made. The adjustment of the air volume and air pressure of the air inlet through the air inlet adjustment structure 21 can be called the first stage adjustment, also known as the adjustment of the horizontal air volume, and also known as the coarse adjustment of the air volume and air pressure of the air inlet.

[0055] Hot air entering the air inlet channel 3 enters the corresponding flow passage 411 through the air inlet hole 31 on the bottom wall of the air inlet channel 3. Since an air inlet volume regulating valve 32 is provided at the air inlet hole 31, the air volume of hot air entering the flow passage 411 can be changed by changing the vertical distance between the air inlet volume regulating valve 32 and the air inlet hole 31. In this way, the vertical air volume can be adjusted by means of the air inlet volume regulating valve 32. The adjustment of the air volume by the air inlet volume regulating valve 32 is called the second stage adjustment, also known as fine adjustment of the air volume.

[0056] The hot air jet entering the air cavity 41 from the flow hole 411 is mixed in the air cavity 41 and buffered and distributed by the air nozzle pressure equalization plate 43 before entering the air nozzle 42 in a more uniform manner. The adjustment of the air pressure uniformity of the air inlet by the air nozzle pressure equalization plate 43 is called the third stage adjustment. The hot air is blown from the air nozzle 42 to the workpiece to be dried, and the temperature of the hot air is reduced to become cold air. Of course, the so-called cold air is not cool air, but only the temperature of the air is reduced relative to the hot air.

[0057] The cold air enters the return air hole 61 after being uniformly distributed through the return air equalization plate 51 from the return air duct 5. The uniform adjustment of the return air pressure by the return air equalization plate 51 is called the fourth stage of adjustment. Furthermore, since there is a return air volume regulating valve 62 at the return air hole 61, the air volume of the cold air entering the outlet air duct 6 can be changed by changing the vertical distance between the return air volume regulating valve 62 and the return air hole 61. In this way, the vertical air volume can be adjusted by means of the return air volume regulating valve 62. The adjustment of the return air volume by the return air volume regulating valve 62 is called the fifth stage of adjustment, also known as fine adjustment of the air volume.

[0058] Cold air enters the air outlet duct 6 through the return air hole 61, and after the air outlet regulating structure 71 adjusts the air volume and air pressure, it enters the air outlet pipe 7 and is discharged from the air outlet 72 of the air outlet pipe 7. The adjustment of the air volume and air pressure of the horizontal air outlet through the air outlet regulating structure 71 is called the sixth stage adjustment, also known as the coarse adjustment of the air volume and air pressure of the air outlet.

[0059] In this embodiment, the first to sixth adjustment stages can be selected or selectively activated according to the requirements of different industries for air supply uniformity. Furthermore, by coarse adjustment of the horizontal air volume (through the adjustment of the air inlet adjustment structure 21 and the air outlet adjustment structure 71) combined with fine adjustment of the vertical air volume (through the adjustment of the air inlet air volume adjustment valve 32 and the air return air volume adjustment valve 62), the drying uniformity of the entire drying surface can be improved, and the needs of different drying processes can also be met.

[0060] In addition, in this embodiment, the adjustable air intake system of the oven also includes a sensor, a control mechanism, and a drive mechanism. Both the sensor and the drive mechanism are electrically connected to the control mechanism. The sensor is configured as a pressure sensor or a flow sensor. Both the control mechanism and the drive mechanism are existing mechanisms. Sensors are installed at one or more locations, including the air inlet 31, the return air vent 61, the inlet of the air intake channel 3, and the outlet of the air outlet channel 6. The control mechanism controls the drive mechanism to move based on the sensor's detection signal, thereby driving the corresponding airflow adjustment structure. For example, if the sensor is located at the air inlet 31, the sensor's detection signal is sent to the control mechanism, which then controls the drive mechanism to move the air intake airflow regulating valve 32, thereby changing the vertical distance between the air intake airflow regulating valve 32 and the air inlet 31, thus automatically and in real-time adjusting the air intake airflow. For example, a sensor can be installed at the return air vent 61. The sensor's detection signal is sent to the control mechanism, which then controls the drive mechanism to move the return air volume regulating valve 62, thereby changing the vertical distance between the return air volume regulating valve 62 and the return air vent 61, thus automatically adjusting the return air volume in real time. Alternatively, a sensor can be installed at the inlet of the air inlet channel 3. The sensor's detection signal is sent to the control mechanism, which then controls the drive mechanism to move the air inlet regulating structure 21, thereby changing the airflow area and automatically adjusting the airflow from the air inlet pipe 2 into the air inlet channel 3 in real time. Similarly, a sensor can be installed at the outlet of the air outlet channel 6. The sensor's detection signal is sent to the control mechanism, which then controls the drive mechanism to move the air outlet regulating structure 71, thereby changing the airflow area and automatically adjusting the airflow from the air outlet channel 6 into the air outlet pipe 7 in real time. An oven with an adjustable air supply system equipped with sensors, a control mechanism, and a drive mechanism exhibits stronger uniformity and compatibility, and can handle different drying processes.

[0061] In this embodiment, the number of air inlet channel 3, air inlet hole 31, air inlet volume regulating valve 32, flow passage hole 411, nozzle structure 4, air outlet channel 6, return air hole 61, and return air volume regulating valve 62 are all two or three or more. The specific number is not limited and can be adjusted according to the actual drying uniformity requirements of the equipment and different drying process requirements.

[0062] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. An adjustable air supply system for an oven, characterized in that, include: The distribution box (1) is provided with an air inlet channel (3) and an air outlet channel (6) inside. The bottom wall of the air inlet channel (3) is provided with an air inlet hole (31), and the bottom wall of the air outlet channel (6) is provided with a return air hole (61). A nozzle structure (4) is connected to the distribution box (1) and communicates with the corresponding air inlet (31). Return air channels (5) are provided on both sides of the nozzle structure (4), and the return air channels (5) communicate with the return air inlet (61) and the nozzle structure (4). An air inlet flow regulating valve (32) is provided at the air inlet (31) to regulate the air volume entering the nozzle structure (4) from the air inlet channel (3) through the air inlet (31); the nozzle structure (4) includes an air cavity (41) and a nozzle (42) fixed on the side of the air cavity (41) away from the distribution box (1); the top of the air cavity (41) is provided with a flow passage (411) that is directly opposite to and communicates with the air inlet (31); wherein, the air inlet flow regulating valve (32) changes the air volume of hot air entering the flow passage (411) by changing the vertical distance between the air inlet flow regulating valve (32) and the air inlet (31).

2. The adjustable air supply system of the oven according to claim 1, characterized in that, A return air volume regulating valve (62) is provided at the return air hole (61) to regulate the air volume entering the air outlet channel (6) from the return air channel (5) through the return air hole (61).

3. The adjustable air supply system of the oven according to claim 1 or 2, characterized in that, It also includes an air inlet pipe (2) connected to one end of the distribution box (1) and an air outlet pipe (7) connected to the other end of the distribution box (1). One end of the air inlet channel (3) is closed and the other end is connected to the air inlet pipe (2). One end of the air outlet channel (6) is closed and the other end is connected to the air outlet pipe (7).

4. The adjustable air supply system of the oven according to claim 3, characterized in that, It also includes an air intake adjustment structure (21), which is slidably mounted on the distribution box (1) and is located near the end of the air intake channel (3) that connects to the air intake pipe (2) to adjust the air volume entering the air intake channel (3) from the air intake pipe (2), and / or, it also includes an air outlet adjustment structure (71), which is slidably mounted on the distribution box (1) and is located near the end of the air outlet channel (6) that connects to the air outlet pipe (7) to adjust the air volume entering the air outlet pipe (7) from the air outlet channel (6).

5. The adjustable air supply system of the oven according to claim 1 or 2, characterized in that, The nozzle structure (4) is provided with a nozzle pressure equalizing plate (43), and / or the return air channel (5) is provided with a return air pressure equalizing plate (51).

6. The adjustable air supply system of the oven according to claim 1 or 2, characterized in that, The length extension direction of the nozzle structure (4) is perpendicular to the length extension direction of the air inlet channel (3).

7. The adjustable air supply system of the oven according to claim 1 or 2, characterized in that, There are at least two air inlet channels (3) and at least two air outlet channels (6), and the air inlet channels (3) and the air outlet channels (6) are arranged alternately side by side.

8. The adjustable air supply system of the oven according to claim 1 or 2, characterized in that, The size of the air inlet hole (31) on the bottom wall of the same air inlet channel (3) gradually increases along the air inlet direction.

9. The adjustable air supply system of the oven according to claim 1 or 2, characterized in that, The size of the return air hole (61) on the bottom wall of the same air outlet channel (6) gradually decreases along the air outlet direction.

10. The adjustable air supply system of the oven according to claim 4, characterized in that, It also includes a sensor, a control mechanism, and a drive mechanism. The sensor and the drive mechanism are electrically connected to the control mechanism. The sensor is configured as a pressure sensor or a flow sensor. The sensor is installed at one or more locations, such as the air inlet, the air return, the inlet of the air inlet channel, and the outlet of the air outlet channel. The control mechanism controls the drive mechanism to move according to the detection signal of the sensor to drive the air volume adjustment structure to move.

Images