Air supply device for drying equipment and design method of air supply device

Abstract

The invention relates to the technical field of drying equipment, and discloses an air supply device for drying equipment and a design method thereof, and the air supply device comprises a first air supply cavity, a second air supply cavity, an air mixing chamber and spoilers. Part of high-temperature and high-humidity airflow in the drying equipment can be guided into the second air supply cavity through the second air inlet, guided into the air mixing chamber from the second air outlet and guided into the drying equipment through the third air outlet after being mixed with hot air guided into the first air supply cavity in the air mixing chamber, and materials in the drying equipment are dried; besides, a spoiler arranged in the air mixing chamber can play a role in spoiling, the mixing effect of airflow at the first air outlet and the second air outlet is improved, the temperature uniformity of high-temperature airflow in the air mixing chamber is improved, and the problem that the temperature of the airflow entering the drying equipment is not uniform is avoided; and the throttling area at the spoiler in the air mixing chamber can be accurately controlled, and accurate matching of the flow of the air supply device and design parameters of the drying equipment is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of drying equipment, and in particular to an air supply device for drying equipment and a design method thereof. Background Art

[0002] In traditional heat pump drying equipment, although the ambient fresh air can be mixed with the high-temperature and high-humidity return air in the drying chamber for heat exchange after entering the chassis, and then dehumidified and cooled by the evaporator, and then heated by the condenser and sent to the drying room to achieve heating and drying of the materials, the existing drying equipment lacks a precise adjustment mechanism for the return air volume according to the fresh air temperature and flow rate, resulting in large fluctuations in the temperature in the drying chamber. Summary of the invention

[0003] In view of this, the present invention provides an air supply device for drying equipment and a design method thereof, which improves the utilization rate of heat, reduces energy consumption, and can avoid the problem of uneven temperature of air flow entering the drying equipment; it can also achieve precise control of the throttling area at the spoiler in the air mixing chamber, ensuring the precise match between the flow rate of the air supply device and the design parameters of the drying equipment.

[0004] In order to achieve the above technical effects, the present invention provides an air supply device for a drying device, comprising:

[0005] A first air supply cavity, wherein the first air supply cavity is provided with a first air inlet and a first air outlet; the first air inlet is connected to a hot air duct;

[0006] a second air supply cavity, wherein the second air supply cavity is provided with a second air inlet and a second air outlet; the second air inlet is connected to the inner cavity of the drying device, and is used to introduce the high-temperature and high-humidity airflow in the inner cavity of the drying device into the second air supply cavity;

[0007] An air mixing chamber, wherein the air mixing chamber is provided with a third air inlet and a third air outlet, the first air outlet and the second air outlet are evenly connected to the third air inlet, and the third air outlet is connected to the inner cavity of the drying device, so as to provide hot air for the drying device;

[0008] The spoiler is located in the air mixing chamber at a position directly opposite to the third air inlet. The spoiler is a plate-like structure. Rotation shafts are coaxially arranged on both sides of the length direction of the spoiler. The rotation shafts are movably installed in the air mixing chamber to adjust the deflection angle of the spoiler relative to the horizontal direction.

[0009] Furthermore, the air supply device includes a plurality of air supply units, and each air supply unit includes one first air supply cavity and one second air supply cavity.

[0010] Furthermore, each air supply unit includes an independent air mixing chamber or multiple air supply units share the same air mixing chamber.

[0011] Furthermore, it includes a chassis arranged on the outside of the drying equipment along the length direction of the drying equipment, and the inner cavity of the chassis is provided with multiple partitions along the vertical direction, and the multiple partitions divide the inner cavity of the chassis into independent chambers, respectively forming a first air supply chamber and a second air supply chamber, and the first air supply chamber and the second air supply chamber are arranged at intervals from each other; the first air outlet is located at the bottom of the chassis corresponding to the first air supply chamber, and the second air outlet is located at the bottom of the chassis corresponding to the second air supply chamber; the first air inlet chamber and the second air inlet chamber are respectively located on the side or top surface of the corresponding chamber.

[0012] Furthermore, the partition is a metal plate, and is provided with heat conducting fins extending toward the inner side of the corresponding chamber.

[0013] Furthermore, two adjacent first air outlets and second air outlets share a third air inlet, and at least one spoiler is arranged in the air mixing chamber opposite to each third air inlet.

[0014] Furthermore, one end of the rotating shaft of the spoiler extends out of the air mixing chamber, and the rotating shaft end outside the air mixing chamber is connected to a servo motor for adjusting a deflection angle of the spoiler relative to the horizontal direction through the servo motor.

[0015] Furthermore, an air guide plate is provided between the spoiler and the third air outlet.

[0016] In order to achieve the above technical effects, the present invention also provides a method for designing an air supply device for a drying device, which is used to obtain the throttling area at the spoiler of the air supply device, comprising:

[0017] Establishing a three-dimensional model including a first air supply cavity, a second air supply cavity and an air mixing chamber;

[0018] Taking the total air supply flow of the first air supply cavity and the second air supply cavity and the cross-sectional area of ​​the third air inlet of the air mixing chamber as combined constraints, the three-dimensional model is simulated and analyzed using fluid simulation software to obtain the simulated value of the flow of the third air outlet of the air mixing chamber corresponding to different throttling areas at the spoiler in the air mixing chamber;

[0019] According to the total air supply flow of the first air supply cavity and the second air supply cavity, the cross-sectional area of ​​the third air inlet of the air mixing chamber, and the simulated value of the flow rate of the third air outlet of the air mixing chamber corresponding to different throttling areas at the spoiler in the air mixing chamber, a functional relationship between the flow rate of the third air outlet and the throttling area is constructed;

[0020] According to the designed total air supply flow of the first air supply cavity and the second air supply cavity of the air supply device, the size parameters of the air mixing chamber and the design value of the third air outlet flow of the air mixing chamber, the throttling area at the spoiler in the air mixing chamber is obtained by analyzing the functional relationship between the third air outlet flow and the throttling area.

[0021] Furthermore, the functional relationship between the third air outlet flow rate and the throttling area is constructed as follows: Where Q3 is the mass flow rate of the third outlet of the air mixing chamber, A s is the throttling area at the spoiler in the air mixing chamber, Q1 is the air supply mass flow rate of the first air supply cavity, Q2 is the air supply mass flow rate of the second air supply cavity, K is the fitting coefficient, K is obtained by fitting the combined constraint condition parameters and the simulation data value, and A2 is the cross-sectional area of ​​the third air inlet of the air mixing chamber.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. The present invention can utilize part of the high-temperature and high-humidity airflow in the drying equipment, thereby improving the utilization rate of heat and reducing energy consumption; in addition, the spoiler arranged in the air mixing chamber can play a role in spoiling the airflow, improve the mixing effect of the airflows at the first air outlet and the second air outlet, improve the temperature uniformity of the high-temperature airflow in the air mixing chamber, and avoid the problem of uneven temperature of the airflow entering the drying equipment.

[0024] 2. The present invention also obtains the simulation value of the flow rate at the third air outlet of the mixing chamber corresponding to different throttling areas at the spoiler in the mixing chamber through simulation, so as to construct a functional relationship between the flow rate at the third air outlet and the throttling area. The functional relationship takes into account the aerodynamic state and pressure loss at the spoiler, and can realize precise control of the throttling area at the spoiler in the mixing chamber, thereby ensuring the precise matching of the flow rate of the air supply device with the design parameters of the drying equipment, and providing a strong guarantee for the drying efficiency and equipment performance of the drying equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 This is a schematic diagram of the structure of the air supply device used for the drying equipment in the embodiment;

[0027] Figure 2 This is a schematic diagram of the installation structure of the air supply device on the drying equipment in the embodiment;

[0028] Figure 3It is a structural schematic diagram of an air supply device in which a partition is used to form a first air supply cavity and a second air supply cavity in an embodiment;

[0029] Figure 4 Schematic diagram of the structure of the partition with heat-conducting fins in the embodiment;

[0030] Figure 5 It is a flow chart of the method for designing an air supply device for drying equipment in the embodiment;

[0031] Among them, 1. first air supply cavity; 101. first air inlet; 102. first air outlet; 2. second air supply cavity; 201. second air inlet; 202. second air outlet; 3. drying equipment; 4. air mixing chamber; 401. third air inlet; 402. third air outlet; 5. spoiler; 6. rotating shaft; 7. chassis; 8. partition; 9. thermal fins; 10. air guide plate. DETAILED DESCRIPTION

[0032] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0033] The following describes the implementation methods of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific implementation methods, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, in the absence of conflict, the following embodiments and the features in the embodiments can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work belong to the scope of protection of the present application.

[0034] Example

[0035] See also Figure 1 and Figure 2 , an air supply device for a drying device, comprising:

[0036] A first air supply cavity 1, wherein the first air supply cavity 1 is provided with a first air inlet 101 and a first air outlet 102; the first air inlet 101 is connected to a hot air duct;

[0037] A second air supply cavity 2, wherein the second air supply cavity 2 is provided with a second air inlet 201 and a second air outlet 202; the second air inlet 201 is connected to the inner cavity of the drying device 3, and is used to introduce the high-temperature and high-humidity airflow in the inner cavity of the drying device 3 into the second air supply cavity 2;

[0038] The air mixing chamber 4 is provided with a third air inlet 401 and a third air outlet 402, the first air outlet 102 and the second air outlet 202 are evenly connected to the third air inlet 401, and the third air outlet 402 is connected to the inner cavity of the drying device 3, so as to provide hot air for the drying device 3;

[0039] The spoiler 5 is located in the air mixing chamber 4 at a position directly opposite to the third air inlet 401. The spoiler 5 is a plate-like structure. Rotating shafts 6 are coaxially arranged on both sides of the length direction of the spoiler 5. The rotating shafts 6 are movably installed in the air mixing chamber to adjust the deflection angle of the spoiler 5 relative to the horizontal direction.

[0040] In this embodiment, part of the high-temperature and high-humidity airflow in the drying equipment 3 can be introduced into the second air supply chamber 2 through the second air inlet 201, and introduced into the mixing chamber 4 from the second air outlet 202. After being mixed with the hot air introduced from the first air supply chamber 1 in the mixing chamber 4, it is introduced into the drying equipment 3 through the third air outlet 402, so as to dry the materials in the drying equipment 3, and part of the high-temperature and high-humidity airflow in the drying equipment 3 can be utilized, thereby improving the utilization rate of heat and reducing energy consumption; in addition, the spoiler 5 arranged in the mixing chamber 4 can play a role of spoiler, improve the mixing effect of the airflow at the first air outlet 102 and the second air outlet 202, improve the temperature uniformity of the high-temperature airflow in the mixing chamber 4, and avoid the problem of uneven temperature of the airflow entering the drying equipment 3.

[0041] In order to match the air supply device flow rate with the design parameters of the drying equipment, this embodiment also provides a design method for the air supply device of the drying equipment to obtain the throttling area at the spoiler 5 of the air supply device, see Figure 5 The specific operation process is as follows:

[0042] Step 1: Establish a three-dimensional model including the first air supply cavity 1, the second air supply cavity 2 and the air mixing chamber 4;

[0043] Step 2: Taking the total air supply flow of the first air supply cavity 1 and the second air supply cavity 2 and the cross-sectional area of ​​the third air inlet 401 of the air mixing chamber 4 as combined constraints, the three-dimensional model is simulated and analyzed using fluid simulation software to obtain the flow simulation value of the third air outlet 402 of the air mixing chamber corresponding to different throttling areas at the spoiler 5 in the air mixing chamber 4;

[0044] Step 3, constructing a functional relationship between the flow rate of the third air outlet 402 and the throttling area according to the total air supply flow of the first air supply cavity 1 and the second air supply cavity 2, the cross-sectional area of ​​the third air inlet 401 of the air mixing chamber 4, and the flow simulation value of the third air outlet 402 of the air mixing chamber 4 corresponding to different throttling areas at the spoiler 5 in the air mixing chamber 4;

[0045] In this embodiment, the functional relationship between the flow rate of the third air outlet 402 and the throttling area is constructed as follows: Where Q3 is the mass flow rate of the third air outlet 402 of the air mixing chamber 4, A s is the throttling area at the spoiler 5 in the air mixing chamber 4, Q1 is the air supply mass flow rate of the first air supply chamber 1, Q2 is the air supply mass flow rate of the second air supply chamber 2, K is the fitting coefficient, K is obtained by fitting the combined constraint condition parameters and the simulation data value, and A2 is the cross-sectional area of ​​the third air inlet 401 of the air mixing chamber 4;

[0046] Step 4: According to the designed total air supply flow of the first air supply chamber 1 and the second air supply chamber 2 of the air supply device, the size parameters of the mixing chamber 4 and the design value of the flow of the third air outlet 402 of the mixing chamber 4, the throttling area at the spoiler 5 in the mixing chamber 4 is analyzed using the functional relationship between the flow of the third air outlet 402 and the throttling area.

[0047] In this embodiment, simulation is performed to obtain flow simulation values ​​of the third air outlet 402 of the mixing chamber 4 corresponding to different throttling areas at the spoiler 5 in the mixing chamber 4, so as to construct a functional relationship between the flow at the third air outlet 402 and the throttling area. The functional relationship takes into account the aerodynamic state and pressure loss at the spoiler 5, and can achieve precise control of the throttling area at the spoiler 5 in the mixing chamber 4, thereby ensuring a precise match between the flow of the air supply device and the design parameters of the drying equipment 3, and providing a strong guarantee for the drying efficiency and equipment performance of the drying equipment 3.

[0048] In this embodiment, the air supply device includes a plurality of air supply units, each of which includes a first air supply cavity 1 and a second air supply cavity 2. In each air supply unit, the first air supply cavity 1 is used to introduce external hot air, and the second air supply cavity 2 is used to reintroduce part of the high-temperature and high-humidity airflow in the drying device 3 to achieve heat recycling; and each air supply unit can work independently, especially the air supply volume can be flexibly adjusted according to the actual needs in the drying device 3, thereby improving the adaptability and drying efficiency of the air supply device. It should be noted that each air supply unit includes an independent air mixing chamber 4 or multiple air supply units share the same air mixing chamber 4. If each air supply unit uses an independent air mixing chamber 4, the position of the air supply unit can be adaptively adjusted according to the position of the air inlet of the drying device 3, further improving the flexibility of the air supply device and the matching of the air supply device with the drying device 3. When multiple air supply units share the same air mixing chamber 4, the structure of the air supply device can be further simplified and the manufacturing cost can be reduced.

[0049] See also Figure 3 and Figure 4In a specific implementation process, the air supply device includes a chassis 7 arranged outside the drying device 3 along the length direction of the drying device 3, and the inner cavity of the chassis 7 is provided with a plurality of partitions 8 along the vertical direction, and the plurality of partitions 8 divide the inner cavity of the chassis 7 into independent chambers, respectively forming a first air supply chamber 1 and a second air supply chamber 2, and the first air supply chamber 1 and the second air supply chamber 2 are arranged at intervals from each other; the first air outlet 102 is located at the bottom of the chassis 7 corresponding to the first air supply chamber 1, and the second air outlet 202 is located at the bottom of the chassis 7 corresponding to the second air supply chamber 2; the first air inlet chamber and the second air inlet chamber are respectively located on the side or top surface of the corresponding chamber. The air supply device has a simple structure and is easy to process and manufacture.

[0050] In this embodiment, the partition 8 is a metal plate, and the partition 8 is further provided with heat-conducting fins 9 extending toward the inner side of the corresponding chamber. The provision of the heat-conducting fins 9 can enhance the heat conduction performance of the partition 8, so that when the air supply device is in operation, the airflow in the first air supply chamber 1 and the airflow in the second air supply chamber 2 are preliminarily heat-exchanged through the heat-conducting fins 9, ensuring that the temperature in the air mixing chamber 4 can reach a balanced state more quickly, further improving the uniformity of the airflow temperature in the air mixing chamber 4.

[0051] In this embodiment, two adjacent first air outlets 102 and second air outlets 202 share a third air inlet 401, and at least one spoiler 5 is provided in the air mixing chamber 4 opposite to each third air inlet 401. The number of spoilers 5 at the same air supply unit position may be one or more than one, and the specific number is set with the goal of effectively disturbing the airflow entering the air mixing chamber 4, so as to ensure that the airflow is more fully mixed in the air mixing chamber 4.

[0052] In this embodiment, one end of the rotating shaft 6 of the spoiler 5 extends out of the air mixing chamber 4, and the end of the rotating shaft 6 located outside the air mixing chamber 4 is connected to the servo motor drive, which is used to adjust the deflection angle of the spoiler 5 relative to the horizontal direction through the servo motor. The servo motor accurately controls the angle of the spoiler 5, optimizes the uniformity of airflow mixing, and improves the efficiency of temperature and humidity adjustment.

[0053] In this embodiment, an air guide plate 10 is disposed between the spoiler 5 and the third air outlet 402 .

[0054] The function of the air guide plate is to guide the airflow out of the third air outlet so that it can flow in a predetermined direction. The design of the air guide plate can be streamlined to reduce the resistance of the airflow passing through and reduce the flow loss of the airflow at the third air outlet. By using the air guide plate in conjunction with the spoiler, the temperature, direction and velocity of the airflow can be precisely controlled, thereby meeting the requirements of the drying equipment for precise temperature and humidity regulation.

[0055] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. An air supply device for drying equipment, characterized in that: include: A first air supply cavity, wherein the first air supply cavity is provided with a first air inlet and a first air outlet; The first air inlet is connected to the hot air duct; a second air supply cavity, wherein the second air supply cavity is provided with a second air inlet and a second air outlet; the second air inlet is connected to the inner cavity of the drying device, and is used to introduce the high-temperature and high-humidity airflow in the inner cavity of the drying device into the second air supply cavity; An air mixing chamber, wherein the air mixing chamber is provided with a third air inlet and a third air outlet, the first air outlet and the second air outlet are evenly connected to the third air inlet, and the third air outlet is connected to the inner cavity of the drying device, so as to provide hot air for the drying device; The spoiler is located in the air mixing chamber at a position directly opposite to the third air inlet. The spoiler is a plate-like structure. Rotation shafts are coaxially arranged on both sides of the length direction of the spoiler. The rotation shafts are movably installed in the air mixing chamber to adjust the deflection angle of the spoiler relative to the horizontal direction.

2. The air supply device according to claim 1, characterized in that: The air supply device includes a plurality of air supply units, and each air supply unit includes one first air supply cavity and one second air supply cavity.

3. The air supply device according to claim 2, characterized in that: Each air supply unit includes an independent air mixing chamber or multiple air supply units share the same air mixing chamber.

4. The air supply device according to claim 1, characterized in that: It includes a chassis arranged on the outside of the drying equipment along the length direction of the drying equipment, and the inner cavity of the chassis is provided with multiple partitions along the vertical direction, and the multiple partitions divide the inner cavity of the chassis into independent chambers, respectively forming a first air supply chamber and a second air supply chamber, and the first air supply chamber and the second air supply chamber are arranged at intervals from each other; the first air outlet is located at the bottom of the chassis corresponding to the first air supply chamber, and the second air outlet is located at the bottom of the chassis corresponding to the second air supply chamber; the first air inlet chamber and the second air inlet chamber are respectively located on the side or top surface of the corresponding chamber.

5. The air supply device according to claim 4, characterized in that: The partition is a metal plate, and is further provided with heat conducting fins extending toward the inner side of the corresponding chamber.

6. The air supply device according to claim 4, characterized in that: Two adjacent first air outlets and second air outlets share a third air inlet, and at least one spoiler is arranged in the air mixing chamber opposite to each third air inlet.

7. The air supply device according to claim 1, characterized in that: One end of the rotating shaft of the spoiler extends out of the air mixing chamber, and the end of the rotating shaft outside the air mixing chamber is connected to the servo motor for adjusting the deflection angle of the spoiler relative to the horizontal direction through the servo motor.

8. The air supply device according to claim 1, characterized in that: An air guide plate is arranged between the spoiler and the third air outlet.

9. A method for designing an air supply device for drying equipment, for obtaining the throttling area at the spoiler of the air supply device according to any one of claims 1 to 8, characterized in that: include: Establishing a three-dimensional model including a first air supply cavity, a second air supply cavity and an air mixing chamber; Taking the total air supply flow of the first air supply cavity and the second air supply cavity and the cross-sectional area of ​​the third air inlet of the air mixing chamber as combined constraints, the three-dimensional model is simulated and analyzed using fluid simulation software to obtain the simulated value of the flow of the third air outlet of the air mixing chamber corresponding to different throttling areas at the spoiler in the air mixing chamber; According to the total air supply flow of the first air supply cavity and the second air supply cavity, the cross-sectional area of ​​the third air inlet of the air mixing chamber, and the simulated value of the flow rate of the third air outlet of the air mixing chamber corresponding to different throttling areas at the spoiler in the air mixing chamber, a functional relationship between the flow rate of the third air outlet and the throttling area is constructed; According to the designed total air supply flow of the first air supply cavity and the second air supply cavity of the air supply device, the size parameters of the air mixing chamber and the design value of the third air outlet flow of the air mixing chamber, the throttling area at the spoiler in the air mixing chamber is obtained by analyzing the functional relationship between the third air outlet flow and the throttling area.

10. The air supply device design method according to claim 9, characterized in that: The functional relationship between the third air outlet flow and the throttling area is constructed as follows: Where Q3 is the mass flow rate of the third outlet of the air mixing chamber, A s is the throttling area at the spoiler in the air mixing chamber, Q1 is the air supply mass flow rate of the first air supply cavity, Q2 is the air supply mass flow rate of the second air supply cavity, K is the fitting coefficient, K is obtained by fitting the combined constraint condition parameters and the simulation data value, and A2 is the cross-sectional area of ​​the third air inlet of the air mixing chamber.

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