Parallel air duct overflow regulation and control design method, air conditioner air duct structure and air conditioner

Abstract

The invention provides a parallel air duct overflow regulation and control design method, an air conditioner air duct structure and an air conditioner. The parallel air duct overflow regulation and control design method comprises the steps that the air duct structure is determined; determining whether a condition Q1-Q0gt is satisfied or not; if yes, a first overflow structure is additionally arranged; the first overflow structure comprises a first overflow hole, a first baffle and a first control mechanism, the first overflow hole is formed in the adjacent position of the first air outlet end and the second air outlet end in a penetrating mode so that the first air channel can communicate with the second air channel, and the first control mechanism can control the first baffle to move so as to open or close the first overflow hole. According to the parallel air duct overflow regulation and control design method, the overflow structure is selectively additionally arranged between the two parallel air ducts, so that the high-resistance air duct sections are combined and recombined to reduce the air duct resistance, and the air flow pressure of each branch air duct is regulated and controlled in a balanced manner, so that the resistance of each branch air duct is reduced, and the air supply amount is increased.

Description

Technical Field

[0001] The present invention relates to the technical field of air-conditioning duct design methods, and more particularly to a parallel duct overflow regulation design method, an air-conditioning duct structure for implementing this design method, and an air conditioner having the air-conditioning duct structure. Background Art

[0002] The duct is an important component of an air conditioner. The fan conveys air into the duct, and the duct distributes and conveys the air to improve energy efficiency and comfort. Among them, during the process of conveying and distributing air, the inner wall of the duct will have resistance to the air. Excessive duct resistance will affect the ventilation efficiency, cause the fan to deviate from the optimal operating condition, and lead to an increase in energy consumption. In severe cases, it will also cause large vibrations and noises, thus affecting the normal operation of the equipment.

[0003] In order to reduce the duct resistance, one existing method is to optimize the duct structure design, such as changing the effective ventilation area of the duct, reducing the duct curvature, etc. However, the optimization design of the duct structure will lead to the complication of the duct structure and increase the difficulty of the duct injection molding and demolding process. Another existing method is to change the flow condition in the duct, such as setting a flow guiding structure and a drag reducing member to reduce the local resistance loss in the duct. However, setting a flow guiding structure and a drag reducing member in the duct will lead to the complication of the manufacturing process of the duct structure. Summary of the Invention

[0004] The first object of the present invention is to provide a parallel duct overflow regulation design method, which can selectively add an overflow structure between two parallel ducts to merge and reorganize the high-resistance duct sections to reduce the duct resistance, balance and regulate the air flow pressure of each branch duct, thereby reducing the resistance of each branch duct, further increasing the air supply volume, and having a simple and compact duct structure design and a simple and fast manufacturing process.

[0005] The second object of the present invention is to provide an air-conditioning duct structure for implementing the above parallel duct overflow regulation design method.

[0006] The third object of the present invention is to provide an air conditioner having the above air-conditioning duct structure.

[0007] To achieve the first object of the present invention, the present invention provides a parallel air duct overflow regulation design method, including: determining the air duct structure, the air duct structure includes a first fan, a first air duct, a second fan and a second air duct, the first air duct is connected to the first air outlet of the first fan, the second air duct is connected to the second air outlet of the second fan, and the first air outlet end of the first air duct and the second air outlet end of the second air duct are arranged side by side in the first direction, so that the first air outlet of the first air duct and the second air outlet of the second air duct are located on the first air outlet side of the air duct structure; in the first direction, the first width C1 of the inner cavity duct of the first air outlet end is less than the second width D1 of the inner cavity duct of the second air outlet end; determining whether the condition Q1 - Q0 > 0 is satisfied, if so, adding a first overflow structure; the first overflow structure includes a first overflow hole, a first baffle and a first control mechanism, the first overflow hole is penetrated and opened at the adjacent position of the first air outlet end and the second air outlet end to connect the first air duct and the second air duct, and the first control mechanism can control the movement of the first baffle to open or close the first overflow hole; where Q0 is the first actual air volume on the first air outlet side before adding the first overflow structure, Q1 is the first target air volume on the first air outlet side, the maximum opening degree of the first overflow hole is B1, and

[0008] As can be seen from the above solution, the parallel air duct overflow regulation design method of the present invention can selectively add an overflow structure between two parallel air ducts to merge and reorganize the high-resistance air duct section to reduce the air duct resistance, evenly regulate the air flow pressure of each branch air duct, thereby reducing the resistance of each branch air duct, further increasing the air supply volume, and the air duct structure design is simple and compact, and the manufacturing process is simple and fast.

[0009] A preferred solution is that the first control mechanism includes a motor and a gear, the gear is sleeved on the driving shaft of the motor, a rack is arranged on the first baffle, and the rack meshes with the gear.

[0010] A further solution is that when determining the air duct structure, the first dimension condition is satisfied

[0011]

[0012] A further solution is that the distance between the first fan or the second fan close to the first overflow hole and the first overflow hole is A, and A ≥ 100 mm.

[0013] A further solution is that the air duct structure further includes a third air duct, a first arc-shaped plate, a first driving mechanism, a fourth air duct, a second arc-shaped plate and a second driving mechanism. The third air duct is connected to the third air outlet of the first fan, and the fourth air duct is connected to the fourth air outlet of the second fan. The third air outlet end of the third air duct and the fourth air outlet end of the fourth air duct are arranged side by side in the first direction, so that the third air outlet of the third air duct and the fourth air outlet of the fourth air duct are located on the second air outlet side of the air duct structure. The second air outlet side and the first air outlet side are respectively located on both sides of the air duct structure in the second direction, and the second direction is perpendicular to the first direction. The first driving mechanism can control the first arc-shaped plate to open / close the first air outlet or the third air outlet, and the second driving mechanism can control the second arc-shaped plate to open / close the second air outlet or the fourth air outlet; in the first direction, the third width C2 of the inner cavity pipeline of the fourth air outlet end is smaller than the fourth width D2 of the inner cavity pipeline of the third air outlet end; and it is determined whether the condition Q3 - Q2 > 0 is satisfied. If so, a second overflow structure is added; the second overflow structure includes a second overflow hole, a second baffle and a second control mechanism. The second overflow hole is penetrated and opened at the adjacent position of the third air outlet end and the fourth air outlet end to connect the third air duct and the fourth air duct. The second control mechanism can control the movement of the second baffle to open or close the second overflow hole; where Q2 is the second actual air volume of the second air outlet side before adding the second overflow structure, Q3 is the second target air volume of the second air outlet side, the maximum opening degree of the second overflow hole is B2, and

[0014] A further solution is that the first fan and the second fan are arranged side by side in the second direction, and both the first fan and the second fan are centrifugal fans.

[0015] A further solution is to calculate the first adjustment impedance S c :

[0016]

[0017] And calculate the first adjustment air volume Q4:

[0018]

[0019] Judge whether the condition is satisfied. If so, set the actual opening degree of the first overflow hole to be B1; where k is the resistance coefficient of the first fan or the second fan, b is the PQ curve offset term of the first fan or the second fan, S1 is the impedance of the first air duct before adding the first overflow structure, S2 is the impedance of the second air duct before adding the first overflow structure, P1 is the first preset ratio and is less than 0.5, α is the impedance adjustment coefficient of the first air duct, β is the impedance adjustment coefficient of the second air duct, and 1 > α ≥ 0.3 and 0 < β ≤ 0.8 are satisfied, or 0 < α ≤ 0.75 and 1 > β ≥ 0.57.

[0020] A further solution is to determine whether the conditions are met If so, set the actual opening degree of the first overflow hole to where P2 is a second preset ratio and is less than 1.

[0021] A further solution is that the first preset ratio P1 is 0.15, and / or the second preset ratio P2 is 0.3.

[0022] To achieve the second object of the present invention, the present invention provides an air-conditioning duct structure, and the air-conditioning duct structure is the duct structure designed by the above-mentioned parallel duct overflow regulation design method.

[0023] To achieve the third object of the present invention, the present invention provides an air conditioner, including a duct structure, and the duct structure is the above-mentioned air-conditioning duct structure. Description of the Drawings

[0024] Figure 1 It is a schematic diagram of the duct structure before the first overflow structure and the second overflow structure are added to the present invention.

[0025] Figure 2 It is a first perspective schematic diagram of the duct structure of the present invention with the first overflow structure added.

[0026] Figure 3 It is a second perspective schematic diagram of the duct structure of the present invention with the first overflow structure added.

[0027] Figure 4 It is a schematic diagram of the up-and-down air outlet mode of the duct structure of the present invention.

[0028] Figure 5 It is a schematic diagram of the up air outlet mode of the duct structure of the present invention.

[0029] Figure 6 It is a schematic diagram of the down air outlet mode of the duct structure of the present invention with the first overflow structure added.

[0030] Figure 7 It is a schematic diagram of the up air outlet mode of the duct structure of the present invention with the second overflow structure added.

[0031] Figure 8 It is a first flowchart of an embodiment of the parallel duct overflow regulation design method of the present invention.

[0032] Figure 9 It is a second flowchart of an embodiment of the parallel duct overflow regulation design method of the present invention.

[0033] Figure 10 It is a distribution diagram of the improvement rate of the impedance adjustment coefficient on the first adjusted air volume in an embodiment of the parallel duct overflow regulation design method of the present invention.

[0034] Figure 11 It is a comparison diagram of the original air duct structure and the optimized air duct structure in the embodiment of the parallel air duct overflow regulation design method of the present invention.

[0035] The present invention will be further described below in conjunction with the accompanying drawings and embodiments. Specific Embodiments

[0036] Refer to Figure 8 , which is the first flowchart of the parallel air duct overflow regulation design method of this embodiment. The specific steps are as follows.

[0037] First, execute step S10 to determine the air duct structure.

[0038] Refer to Figure 1 , at this time, the determined air duct structure includes a first fan 12, a first air duct 14, a second fan 13, and a second air duct 15. The first air duct 14 is connected to the first exhaust port of the first fan 12, the second air duct 15 is connected to the second exhaust port of the second fan 13, and the first air outlet end 141 of the first air duct 14 and the second air outlet end 151 of the second air duct 15 are arranged side by side in the first direction X, so that the first air outlet 142 of the first air duct 14 and the second air outlet 152 of the second air duct 15 are located on the first air outlet side 101 of the air duct structure; in the first direction X, the first width C1 of the inner cavity duct of the first air outlet end 141 of the first air duct 14 is smaller than the second width D1 of the inner cavity duct of the second air outlet end 151 of the second air duct 15.

[0039] Next, execute step S11 to determine whether the first size condition is met If so, execute step S12; if not, execute step S10 to redesign the first width C1 of the inner cavity duct of the first air outlet end 141 of the first air duct 14 and the second width D1 of the inner cavity duct of the second air outlet end 151 of the second air duct 15 to meet the first size condition

[0040] When step S11 determines that the first size condition is met It shows that the size difference between the first width C1 of the inner cavity duct of the first air outlet end 141 of the first air duct 14 and the second width D1 of the inner cavity duct of the second air outlet end 151 of the second air duct 15 is not too large, and can initially meet the air outlet performance of the air duct. Then execute step S12 to determine whether Q1 - Q0 > 0 is satisfied. If so, execute step S14; if not, execute step S13. Wherein, Q0 is the first actual air volume on the first air outlet side 101 before adding the first overflow structure 16, and Q1 is the first target air volume on the first air outlet side 101.

[0041] When it is judged in step S12 that the condition Q1 - Q0 > 0 is not satisfied, it indicates that the first actual air volume Q0 of the first air outlet side 101 before adding the first overflow structure 16 is equal to or greater than the first target air volume Q1 of the first air outlet side 101. It can be seen that the first actual air volume Q0 of the first air outlet side 101 of the air duct structure before adding the first overflow structure 16 (the total actual air volume of the first air outlet 142 of the first air duct 14 and the second air outlet 152 of the second air duct 15) already meets the first target air volume Q1 of the first air outlet side 101 of the air duct structure (the total target air volume set for the first air outlet 142 of the first air duct 14 and the second air outlet 152 of the second air duct 15 when designing the air duct structure). Then, there is no need to increase the air volume anymore, so step S13 is executed, and the air duct structure maintains the current structural design. Refer to Figure 1 as shown.

[0042] It should be noted that the first actual air volume Q0 of the first air outlet side 101 of the air duct structure before adding the first overflow structure 16 (the total actual air volume of the first air outlet 142 of the first air duct 14 and the second air outlet 152 of the second air duct 15) can obtain relevant data through simulation, experiments, etc.

[0043] When it is judged in step S12 that the condition Q1 - Q0 > 0 is satisfied, it indicates that the first actual air volume Q0 of the first air outlet side 101 before adding the first overflow structure 16 is less than the first target air volume Q1 of the first air outlet side 101. It can be seen that the first actual air volume Q0 of the first air outlet side 101 of the air duct structure before adding the first overflow structure 16 (the total actual air volume of the first air outlet 142 of the first air duct 14 and the second air outlet 152 of the second air duct 15) does not meet the first target air volume Q1 of the first air outlet side 101 of the air duct structure (the total target air volume set for the first air outlet 142 of the first air duct 14 and the second air outlet 152 of the second air duct 15 when designing the air duct structure). In order to increase the air volume, step S14 is executed to add the first overflow structure 16.

[0044] Refer to Figure 2 , the first overflow structure 16 of this embodiment includes a first overflow hole 161, a first baffle 162 and a first control mechanism. The first overflow hole 161 is opened through at the adjacent position of the first air outlet end 141 and the second air outlet end 151 to connect the first air duct 14 and the second air duct 15. The first control mechanism can control the movement of the first baffle 162 to open or close the first overflow hole 161. Among them, the maximum opening degree of the first overflow hole 161 of this embodiment is B1, and

[0045] Therefore, when the first fan 12 rotates forward so that the air flow is sent out from the first air outlet 142 of the first air duct 14 and the second air outlet 152 of the second air duct 15 does not supply air, the first control mechanism controls the movement of the first baffle 162 to close the first overflow hole 161; when the second fan 13 rotates forward so that the air flow is sent out from the second air outlet 152 of the second air duct 15 and the first air outlet 142 of the first air duct 14 does not supply air, the first control mechanism controls the movement of the first baffle 162 to close the first overflow hole 161. Thus, when the first air duct 14 or the second air duct 15 supplies air alone, there will be no air pressure difference between the two parallel first air duct 14 and the second air duct 15, and the first control mechanism controls the movement of the first baffle 162 to close the first overflow hole 161, without the need to open the first overflow hole 161 to adjust the air pressure difference between the two parallel first air duct 14 and the second air duct 15. When the first fan 12 rotates forward so that the air flow is sent out from the first air outlet 142 of the first air duct 14, and the second fan 13 rotates forward so that the air flow is sent out from the second air outlet 152 of the second air duct 15, the first control mechanism controls the movement of the first baffle 162 to open the first overflow hole 161. The first overflow hole 161 penetrating through the adjacent position of the first air outlet end 141 of the first air duct 14 and the second air outlet end 151 of the second air duct 15 connects the first air duct 14 and the second air duct 15, enabling the balanced regulation of the air flow pressure between the first air duct 14 and the second air duct 15, so as to merge and reorganize the high-resistance air duct section to reduce the air duct resistance, thereby reducing the resistance of the first air duct 14 and the second air duct 15, further increasing the air supply volume, and the air duct structure design is simple and compact, and the manufacturing process is simple and fast.

[0046] To improve the working stability and reliability of the first overflow structure 16, the first control mechanism of this embodiment includes a motor and a gear 163. The gear 163 is sleeved on the driving shaft of the motor, and a rack 164 is provided on the first baffle 162. The rack 164 meshes with the gear 163.

[0047] To further reduce the air duct resistance, the distance between the first fan 12 or the second fan 13 close to the first overflow hole 161 and the first overflow hole 161 is A, and A≥100mm.

[0048] After adding the first overflow structure 16 in step S14, step S15 is executed to calculate the first adjusted impedance S c and the first adjusted air volume Q4.

[0049] Calculate the first adjusted impedance S c The formula is:

[0050]

[0051] The formula for calculating the first adjusted air volume Q4 is:

[0052]

[0053] Among them, k is the resistance coefficient of the first fan 12 or the second fan 13, b is the PQ curve offset term of the first fan 12 or the second fan 13, and k and b are known parameters that can be obtained when selecting the fan during design. Generally, the first fan 12 and the second fan 13 will select the same type of fan.

[0054] Moreover, S1 is the impedance of the first air duct 14 before adding the first overflow structure 16, and S2 is the impedance of the second air duct 15 before adding the first overflow structure 16. Moreover, α is the impedance adjustment coefficient of the first air duct 14, and β is the impedance adjustment coefficient of the second air duct 15, satisfying 1 > α ≥ 0.3 and 0 < β ≤ 0.8, or 0 < α ≤ 0.75 and 1 > β ≥ 0.57.

[0055] The theoretical calculation formula (1) of the single air duct impedance is as follows:

[0056]

[0057] In the formula, S is the single air duct impedance, which is the decisive factor affecting the shape of the air duct characteristic curve, λ is the friction resistance coefficient, l is the flow path length, d is the inner cavity diameter of the air duct, ∑ξ is the local resistance coefficient, and ρ is the fluid density.

[0058] In a plurality of parallel air duct structures, the total impedance Sc of the plurality of parallel air duct structures and the impedance Si of each single air duct have the following relationship (2):

[0059]

[0060] Expand the above-mentioned plurality of parallel air duct structures and the single air duct impedance in series (3):

[0061]

[0062] According to the application of adding the first overflow structure 16 between the parallel sections of the first air duct 14 and the second air duct 15 in this embodiment, the above formula is corrected (4):

[0063]

[0064] Performing mathematical derivation on the above formula can obtain the calculation formula (5) of the first adjusted impedance S c of this embodiment:

[0065]

[0066] Among them, the above formulas (1), (2), and (3) are existing known theoretical calculation formulas.

[0067] In addition, the fan performance curve equation (6):

[0068] P = Kq 2 + b (6);

[0069] Where k is the fan resistance coefficient and b is the offset term of the fan PQ curve.

[0070] Combined with the impedance S1, S2 and air volume Q of the first air duct 14 and the second air duct 15 after adding the first overflow structure 16 in this embodiment 41 、Q 42 Relationship analysis (7):

[0071]

[0072] By performing mathematical derivation on the above formula, the calculation formula (8) of the first adjusted air volume Q4 in this embodiment can be obtained:

[0073]

[0074] In this embodiment, α is the impedance adjustment coefficient of the first air duct 14, and β is the impedance adjustment coefficient of the second air duct 15. Preferably, 1 > α ≥ 0.3 and 0 < β ≤ 0.8, or, 0 < α ≤ 0.75 and 1 > β ≥ 0.57. As Figure 10 shown, when in the two red triangular regions where 1 > α ≥ 0.3 and 0 < β ≤ 0.8, or, 0 < α ≤ 0.75 and 1 > β ≥ 0.57, the first adjusted air volume will increase, and the maximum increase rate of the theoretical limit air volume can reach 30%.

[0075] See Figure 11 , the three black curves are the original air duct structure characteristic curves before adding the first overflow structure 16, the two red curves are the actual equivalent characteristic curves of the optimized air duct structure after adding the first overflow structure 16, the two ginger curves are the optimized equivalent characteristic curves, 1 and 2 are the operating points of the original air duct structure, 1' and 2' are the actual equivalent operating points of the optimized air duct structure, and A is the optimized equivalent operating point. Thus, it can be seen that the initial pressures of the first air duct 14 and the second air duct 15 are P1 and P2. After adding the first overflow structure 16 between the first air duct 14 and the second air duct 15 and optimizing, the pressures of the two air ducts are evenly reduced to P' after being evenly distributed by the first overflow structure 16, resulting in a reduction in the air duct resistance and an increase in the available space for the fan capacity, prompting the equivalent operating point to shift significantly to the right to the actual equivalent operating points 1', 2', and the corresponding flows q1, q2 shift to the right to q'1, q'2, making the air duct pressures at the air outlet ends where the first air outlet end 141 of the first air duct 14 and the second air outlet end 151 of the second air duct 15 are connected in parallel equal, the flow rate (air supply volume) increases, and the overall machine flow rate is increased to q'1 + q'2.

[0076] Subsequently, step S16 is executed to determine whether the condition is satisfied If so, step S17 is executed; if not, step S18 is executed. Wherein, P1 is a first preset ratio and is less than 0.5.

[0077] When it is judged in step S16 that the condition is satisfied it indicates that the increase amplitude of the first adjusted air volume Q4 of the first air outlet side 101 of the air duct structure after adding the first overflow structure 16 relative to the first target air volume Q1 of the first air outlet side 101 of the air duct structure is small. In order to ensure that the actual air volume of the first air outlet side 101 during actual use by the user can always be greater than the first target air volume Q1 of the first air outlet side 101 to improve the use comfort, step S17 is executed, and the actual opening degree of the first overflow hole 161 is set to B1, that is, the actual opening degree of the first overflow hole 161 is adjusted to the maximum opening degree B1, so as to ensure that the air supply volume can be increased during actual use by the user.

[0078] When it is judged that the condition is not satisfied then step S18 is executed to judge whether the condition is satisfied If so, step S19 is executed. Wherein, P2 is a second preset ratio and is less than 1.

[0079] When it is judged in step S18 that the condition is satisfied it indicates that the increase amplitude of the first adjusted air volume Q4 of the first air outlet side 101 of the air duct structure after adding the first overflow structure 16 relative to the first target air volume Q1 of the first air outlet side 101 of the air duct structure is large. In order to save energy consumption, step S19 is executed, and the actual opening degree of the first overflow hole 161 is set to that is, the actual opening degree of the first overflow hole 161 is adjusted to half of the maximum opening degree B1, so as to save energy consumption while ensuring that the air supply volume can be increased during actual use by the user.

[0080] Specifically, in this embodiment, the first preset ratio P1 is 0.15, and / or the second preset ratio P2 is 0.3.

[0081] See Figures 1 to 3, the air duct structure of this embodiment further includes a third air duct 18, a first arc-shaped plate, a first driving mechanism, a fourth air duct 17, a second arc-shaped plate and a second driving mechanism. The third air duct 18 is connected to the third air outlet of the first fan 12, and the fourth air duct 17 is connected to the fourth air outlet of the second fan 13. Moreover, the third air outlet end 181 of the third air duct 18 and the fourth air outlet end 171 of the fourth air duct 17 are arranged side by side in the first direction X, so that the third air outlet 182 of the third air duct 18 and the fourth air outlet 172 of the fourth air duct 17 are located on the second air outlet side 102 of the air duct structure. The second air outlet side 102 and the first air outlet side 101 are respectively located on both sides of the air duct structure in the second direction Z, and the second direction Z is perpendicular to the first direction X. The first driving mechanism can control the first arc-shaped plate to open / close the first air outlet or the third air outlet, and the second driving mechanism can control the second arc-shaped plate to open / close the second air outlet or the fourth air outlet. In the first direction X, the third width C2 of the inner cavity duct of the fourth air outlet end 171 is smaller than the fourth width D2 of the inner cavity duct of the third air outlet end 181.

[0082] See Figure 4 , when the air duct structure of this embodiment executes the up-and-down air outlet mode, the first air outlet is closed, the first air duct 14 does not supply air, and the third air outlet is opened. The third air duct 18 blows air upward toward the second air outlet side 102 of the air duct structure. At the same time, the second air outlet is opened, the second air duct 15 blows air downward toward the first air outlet side 101 of the air duct structure, and the fourth air outlet is closed, and the fourth air duct 17 does not supply air.

[0083] See Figure 5 , when the air duct structure of this embodiment executes the upward air outlet mode, the first air outlet is closed, the first air duct 14 does not supply air, and the third air outlet is opened. The third air duct 18 blows air upward toward the second air outlet side 102 of the air duct structure. At the same time, the second air outlet is closed, the second air duct 15 does not supply air, and the fourth air outlet is opened. The fourth air duct 17 blows air upward toward the second air outlet side 102 of the air duct structure.

[0084] See Figure 6, when the air duct structure of this embodiment executes the downward air outlet mode, the first air outlet is opened, the first air duct 14 blows air downward towards the first air outlet side 101 of the air duct structure, and the third air outlet is closed, and the third air duct 18 does not supply air. At the same time, the second air outlet is opened, the second air duct 15 blows air downward towards the first air outlet side 101 of the air duct structure, and the fourth air outlet is closed, and the fourth air duct 17 does not supply air. Since the first air outlet end 141 of the first air duct 14 and the second air outlet end 151 of the second air duct 15 are arranged in parallel in this embodiment and are provided with a first overflow structure 16, the first overflow structure 16 can combine and reorganize the high-resistance air duct sections in the first air duct 14 and the second air duct 15 to reduce the air duct resistance, evenly regulate the air flow pressure of the first air duct 14 and the second air duct 15, thereby reducing the air duct resistance of the first air duct 14 and the second air duct 15, and further increasing the air supply volume of the downward air outlet on the first air outlet side 101 of the air duct structure.

[0085] To increase the air supply volume of the upward air outlet on the second air outlet side 102 of the air duct structure, refer to Figure 9 , which is the second flowchart of the parallel air duct overflow regulation design method of this embodiment, and the specific steps are as follows.

[0086] The parallel air duct overflow regulation design method of this embodiment executes step S20 to determine that the air duct structure further includes a third air duct 18, a first arc plate, a first driving mechanism, a fourth air duct 17, a second arc plate, and a second driving mechanism.

[0087] Then, execute step S21 to determine whether the second dimension condition is satisfied If so, execute step S22; if not, execute step S20 to redesign the third width C2 of the inner cavity pipeline of the fourth air outlet end 171 of the fourth air duct 17 and the fourth width D2 of the inner cavity pipeline of the third air outlet end 181 of the third air duct 18 to meet the second dimension condition

[0088] When step S21 determines that the second dimension condition is satisfied It shows that the dimensional difference between the third width C2 of the inner cavity pipeline of the fourth air outlet end 171 of the fourth air duct 17 and the fourth width D2 of the inner cavity pipeline of the third air outlet end 181 of the third air duct 18 is not too large, and the air outlet performance of the air duct can be initially satisfied. Then execute step S22 to determine whether the condition Q3 - Q2 > 0 is satisfied. If so, execute step S24; if not, execute step S23. Wherein, Q2 is the second actual air volume of the second air outlet side 102 before the second overflow structure 19 is added, and Q3 is the second target air volume of the second air outlet side 102.

[0089] When it is determined in step S22 that the condition Q3 - Q2 > 0 is not satisfied, it indicates that the second actual air volume Q2 of the second air outlet side 102 before adding the second overflow structure 19 is equal to or greater than the second target air volume Q3 of the second air outlet side 102. It can be seen that the second actual air volume Q2 (the total actual air volume of the third air outlet 182 of the third air duct 18 and the fourth air outlet 172 of the fourth air duct 17) of the second air outlet side 102 of the air duct structure before adding the second overflow structure 19 already meets the second target air volume Q2 (the total target air volume of the third air outlet 182 of the third air duct 18 and the fourth air outlet 172 of the fourth air duct 17 set when designing the air duct structure) of the second air outlet side 102 of the air duct structure. Then, there is no need to increase the air volume further, so step S23 is executed, and the air duct structure maintains the current structural design. See Figure 1 as shown.

[0090] When it is determined in step S22 that the condition Q3 - Q2 > 0 is satisfied, it indicates that the second actual air volume Q2 of the second air outlet side 102 before adding the second overflow structure 19 is less than the second target air volume Q3 of the second air outlet side 102. It can be seen that the second actual air volume Q2 of the second air outlet side 102 of the air duct structure before adding the second overflow structure 19 does not meet the second target air volume Q3 of the second air outlet side 102 of the air duct structure. In order to increase the air volume, step S24 is executed to add the second overflow structure 19.

[0091] See Figure 7 In this embodiment, the second overflow structure 19 includes a second overflow hole, a second baffle, and a second control mechanism. The second overflow hole is formed through the adjacent positions of the third air outlet end 181 and the fourth air outlet end 171 to connect the third air duct 18 and the fourth air duct 17. The second control mechanism can control the movement of the second baffle to open or close the second overflow hole. Among them, the maximum opening degree of the second overflow hole in this embodiment is B2, and

[0092] Therefore, when the first fan 12 rotates reversely so that the air flow is sent out from the third air outlet 182 of the third air duct 18, and the second fan 13 rotates reversely so that the air flow is sent out from the fourth air outlet 172 of the fourth air duct 17, the second control mechanism controls the movement of the second baffle to open the second overflow hole. The second overflow hole formed through the adjacent positions of the third air outlet end 181 of the third air duct 18 and the fourth air outlet end 171 of the fourth air duct 17 connects the third air duct 18 and the fourth air duct 17, and can evenly regulate the air flow pressure of the third air duct 18 and the fourth air duct 17, so as to merge and reorganize the high-resistance air duct sections to reduce the air duct resistance, thereby reducing the resistance of the third air duct 18 and the fourth air duct 17, and further increasing the air delivery volume. Moreover, the air duct structure design is simple and compact, and the manufacturing process is simple and fast.

[0093] Specifically, the structure of the second control mechanism in this embodiment is the same as that of the first control mechanism in this embodiment.

[0094] After adding the second overflow structure 19 in step S24, step S25 is executed to calculate the second adjusted impedance S d and the second adjusted air volume Q5.

[0095] The formula for calculating the second adjusted impedance S d is as follows:

[0096]

[0097] The formula for calculating the second adjusted air volume Q5 is:

[0098]

[0099] Where k is the resistance coefficient of the first fan 12 or the second fan 12, b is the PQ curve offset term of the first fan 12 or the second fan 12, and k and b are known parameters that can be obtained when the fan is selected during design. S3 is the impedance of the third air duct 18 before adding the second overflow structure 19, and S4 is the impedance of the fourth air duct 17 before adding the second overflow structure 19. And, α is the impedance adjustment coefficient of the third air duct 18, and β is the impedance adjustment coefficient of the fourth air duct 17, satisfying 1>α≥0.3 and 0<β≤0.8, or 0<α≤0.75 and 1>β≥0.57.

[0100] Subsequently, step S26 is executed to determine whether the condition is satisfied. If so, step S27 is executed; if not, step S28 is executed. Where P3 is the third preset ratio and is less than 0.5.

[0101] When it is determined in step S26 that the condition is satisfied, it indicates that the increase in the second adjusted air volume Q5 of the second air outlet side 102 of the air duct structure after adding the second overflow structure 19 relative to the second target air volume Q3 of the second air outlet side 102 of the air duct structure is relatively small. To ensure that the actual air volume of the second air outlet side 102 during actual use by the user can always be greater than the second target air volume Q3 of the second air outlet side 102 to improve the use comfort, step S27 is executed to set the actual opening degree of the second overflow hole to B2, that is, to adjust the actual opening degree of the second overflow hole to the maximum opening degree B3, so as to ensure that the air supply volume can be increased during actual use by the user.

[0102] When it is determined that the condition is not satisfied , then step S28 is executed to determine whether the condition is satisfied. If so, step S29 is executed. Where P4 is the fourth preset ratio and is less than 1.

[0103] When it is determined in step S28 that the condition is satisfied , it indicates that the increase in the second adjusted air volume Q5 of the second air outlet side 102 of the air duct structure after adding the second overflow structure 19 is relatively large compared to the second target air volume Q3 of the second air outlet side 102 of the air duct structure. In order to save energy consumption, step S29 is executed, and the actual opening degree of the second overflow hole is set to That is, the actual opening degree of the second overflow hole is adjusted to half of the maximum opening degree B2, so as to save energy consumption while ensuring that the air supply volume can be increased during actual use by the user.

[0104] Specifically, the third preset ratio P3 in this embodiment is 0.15, and / or the fourth preset ratio P4 is 0.3.

[0105] In order to improve the simplicity and compactness of the air duct structure, the first fan 12 and the second fan 13 in this embodiment are arranged side by side in the second direction Z, and both the first fan 12 and the second fan 13 are centrifugal fans. In the first direction X, the evaporator 11 of the air conditioner is located on the side of the first fan 12 and the second fan 13 away from the first air duct 14, the second air duct 15, the third air duct 18, and the fourth air duct 17.

[0106] The above embodiments are only preferred examples of the present invention and do not limit the scope of implementation of the present invention. Therefore, all equivalent changes or modifications made according to the structure, features, and principles of the scope of the patent application of the present invention should be included within the scope of the patent application of the present invention.

Claims

1. A parallel duct overflow control design method, characterized in that: include: Determine an air duct structure, the air duct structure comprising a first fan, a first air duct, a second fan and a second air duct, the first air duct is connected to a first air outlet of the first fan, the second air duct is connected to a second air outlet of the second fan, and a first air outlet end of the first air duct and a second air outlet end of the second air duct are arranged side by side in a first direction, so that the first air outlet of the first air duct and the second air outlet of the second air duct are located on a first air outlet side of the air duct structure; in the first direction, a first width C1 of an inner cavity pipe of the first air outlet end is smaller than a second width D1 of an inner cavity pipe of the second air outlet end; Determine whether the condition Q1-Q0>0 is satisfied, if so, add a first overflow structure; The first overflow structure includes a first overflow hole, a first baffle and a first control mechanism, wherein the first overflow hole is opened through adjacent positions of the first air outlet end and the second air outlet end to connect the first air duct with the second air duct, and the first control mechanism can control the movement of the first baffle to open or close the first overflow hole; Wherein, Q0 is the first actual air volume on the first air outlet side before the first overflow structure is added, Q1 is the first target air volume on the first air outlet side, the maximum opening of the first overflow hole is B1, and 2. The parallel air duct overflow control design method according to claim 1, characterized in that: The first control mechanism includes a motor and a gear, the gear is sleeved on the driving shaft of the motor, a rack is arranged on the first baffle, and the rack and the gear are meshed with each other.

3. The parallel air duct overflow control design method according to claim 1, characterized in that: When determining the air duct structure, the first size condition is met 4. The parallel air duct overflow control design method according to claim 1, characterized in that: The distance between the first fan or the second fan close to the first overflow hole and the first overflow hole is A, and A≥100 mm.

5. The parallel air duct overflow control design method according to claim 1, characterized in that: The air duct structure also includes a third air duct, a first curved plate, a first driving mechanism, a fourth air duct, a second curved plate and a second driving mechanism, the third air duct is connected to the third air outlet of the first fan, the fourth air duct is connected to the fourth air outlet of the second fan, and the third air outlet end of the third air duct and the fourth air outlet end of the fourth air duct are arranged side by side in the first direction, so that the third air outlet of the third air duct and the fourth air outlet of the fourth air duct are located on the second air outlet side of the air duct structure, the second air outlet side and the first air outlet side are respectively located on both sides of the air duct structure in the second direction, the second direction is arranged perpendicular to the first direction, the first driving mechanism can control the first curved plate to open / close the first air outlet or the third air outlet, and the second driving mechanism can control the second curved plate to open / close the second air outlet or the fourth air outlet; in the first direction, the third width C2 of the inner cavity pipe of the fourth air outlet end is smaller than the fourth width D2 of the inner cavity pipe of the third air outlet end; And determine whether the condition Q3-Q2>0 is met, if so, add a second overflow structure; The second overflow structure includes a second overflow hole, a second baffle and a second control mechanism, the second overflow hole is opened through the adjacent positions of the third air outlet end and the fourth air outlet end to connect the third air duct with the fourth air duct, and the second control mechanism can control the movement of the second baffle to open or close the second overflow hole; Wherein, Q2 is the second actual air volume on the second air outlet side before the second overflow structure is added, Q3 is the second target air volume on the second air outlet side, the maximum opening of the second overflow hole is B2, and 6. The parallel air duct overflow control design method according to claim 5, characterized in that: The first fan and the second fan are arranged side by side in the second direction, and both the first fan and the second fan are centrifugal fans.

7. The parallel air duct overflow control design method according to any one of claims 1 to 6, characterized in that: Calculate the first adjustment impedance S c : And calculate the first adjusted air volume Q4: Determine whether the conditions are met If yes, then the actual opening of the first overflow hole is set to B1; Among them, k is the resistance coefficient of the first fan or the second fan, b is the PQ curve offset item of the first fan or the second fan, S1 is the impedance of the first duct before the first overflow structure is added, S2 is the impedance of the second duct before the first overflow structure is added, P1 is a first preset ratio and is less than 0.5, α is the impedance adjustment coefficient of the first duct, β is the impedance adjustment coefficient of the second duct, satisfying 1>α≥0.3 and 0<β≤0.8, or, 0<α≤0.75 and 1>β≥0.

57.

8. The parallel air duct overflow control design method according to claim 7, characterized in that: Determine whether the conditions are met If so, the actual opening of the first overflow hole is set to Wherein, P2 is a second preset ratio and is less than 1.

9. The parallel air duct overflow control design method according to claim 8, characterized in that: The first preset ratio P1 is 0.15, and / or the second preset ratio P2 is 0.

3.

10. Air conditioning duct structure, characterized by: The air conditioning duct structure is an air duct structure designed by the parallel duct overflow control design method described in any one of claims 1 to 9 above.

11. An air conditioner, comprising an air duct structure, characterized in that: The air duct structure is the air conditioning air duct structure described in claim 10 above.

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