An air supply device and its control method

Abstract

The present invention discloses an air supply device and a control method thereof. The control method includes: driving the fan of the air supply device to rotate at a test speed, and measuring the electrical parameters of the fan; taking the pipe diameter corresponding to the electrical parameters as the pipe diameter of the current air inlet pipe; obtaining a preset speed corresponding to the pipe diameter of the current air inlet pipe; and driving the fan of the air supply device to supply air to the air inlet interface at the preset speed. The technical solution provided by the present invention aims to solve the technical problems of high noise or low air volume caused by the mismatch between the fan speed and the pipe diameter of the actually installed air inlet pipe in the prior art.

Description

Technical Field

[0001] The present invention relates to the field of electrical equipment, and particularly to a air supply device and a control method thereof. Background Art

[0002] Currently, users have higher and higher requirements for air quality. Many families use fresh air fans or air conditioners with fresh air function to circulate indoor and outdoor air to keep the indoor air fresh. The fresh air fan or air conditioner can supply air into the room through the air inlet pipe. Since the air inlet pipe is usually purchased by the user himself / herself, different users may connect air inlet pipes with different pipe diameters to the fresh air fan or air conditioner. And the fan speed of the fresh air fan or air conditioner is usually fixed. The pipe diameter of the air inlet pipe will affect the air outlet resistance of the fresh air fan or air conditioner, and further affect the air outlet flow rate of the fresh air fan or air conditioner. When the fan speed is constant, the larger the pipe diameter of the air inlet pipe, the larger the air outlet flow rate. When the pipe diameter of the air inlet pipe is too large, the overall noise will be relatively large due to the too large air outlet flow rate. When the pipe diameter of the air inlet pipe is too small, the air outlet will be too slow due to the too small air outlet flow rate. Summary of the Invention

[0003] The main object of the present invention is to provide a control method for an air supply device and the air supply device, aiming to solve the technical problem of large noise or low air volume caused by the mismatch between the fan speed and the pipe diameter of the actually installed air inlet pipe.

[0004] To achieve the above object, the control method for the air supply device proposed by the embodiment of the present invention includes:

[0005] Driving the fan of the air supply device to rotate at a test speed, and measuring the electrical parameters of the fan;

[0006] Taking the pipe diameter preset and corresponding to the electrical parameters as the pipe diameter of the current air inlet pipe;

[0007] Obtaining the preset speed corresponding to the pipe diameter of the current air inlet pipe;

[0008] Driving the fan of the air supply device to supply air to the air inlet interface at the preset speed.

[0009] In a schematic embodiment, the electrical parameter is the input current value of the fan or the input power value of the fan.

[0010] In a schematic embodiment, there are multiple non-overlapping numerical ranges of electrical parameters preset, and each numerical range corresponds to a pipe diameter of an air inlet pipe;

[0011] Taking the pipe diameter corresponding to the electrical parameters as the pipe diameter of the current air inlet pipe includes:

[0012] Determine the numerical range where the power parameter is located, obtain the pipe diameter of the air inlet pipe corresponding to this numerical range, and use this pipe diameter as the pipe diameter of the current air inlet pipe.

[0013] In a schematic embodiment, at the test rotation speed of the fan, the larger the pipe diameter, the smaller the value in the numerical range corresponding to this pipe diameter.

[0014] In a schematic embodiment, at the same wind speed gear, the lower the preset rotation speed, the larger the corresponding pipe diameter.

[0015] In a schematic embodiment, there are multiple wind speed gears, and the preset rotation speeds corresponding to the same pipe diameter under different wind speed gears are different;

[0016] The control method further includes: obtaining the set wind speed gear information;

[0017] The obtaining of the preset rotation speed corresponding to the current air inlet pipe diameter includes: obtaining the preset rotation speed corresponding to the current air inlet pipe diameter under the set wind speed gear.

[0018] In a schematic embodiment, multiple pipe diameters respectively correspond one-to-one to multiple rotation speed groups, and each rotation speed group contains multiple preset rotation speeds respectively corresponding one-to-one to multiple wind speed gears;

[0019] The smaller the preset rotation speed corresponding to at least one wind speed gear, the larger the pipe diameter corresponding to the rotation speed group where this preset rotation speed is located;

[0020] The obtaining of the preset rotation speed corresponding to the current air inlet pipe diameter includes:

[0021] According to the set wind speed gear and the current air inlet pipe diameter, select the preset rotation speed corresponding to the set wind speed gear from the rotation speed group corresponding to the current air inlet pipe diameter as the preset rotation speed to be executed by the fan.

[0022] In a schematic embodiment, one of the multiple pipe diameters corresponds to a basic rotation speed group, and the remaining all pipe diameters respectively correspond one-to-one to multiple change amount groups;

[0023] The basic rotation speed group contains multiple preset rotation speeds respectively corresponding one-to-one to multiple wind speed gears;

[0024] The change amount group contains multiple change amounts respectively corresponding one-to-one to multiple wind speed gears;

[0025] The steps of obtaining the preset rotation speed corresponding to this pipe diameter include:

[0026] When the pipe diameter of the current air inlet pipe is the pipe diameter corresponding to the basic rotation speed group, select the preset rotation speed corresponding to the set wind speed gear from the basic rotation speed group as the preset rotation speed to be executed by the fan;

[0027] When the diameter of the current air inlet pipe is not the diameter corresponding to the basic speed group, select the change amount corresponding to the set wind speed gear from the change amount group corresponding to the diameter of the current air inlet pipe, select the preset speed corresponding to the set wind speed gear from the basic speed group, and add the preset speed and the change amount to obtain the preset speed to be executed by the fan;

[0028] Under at least one wind speed gear, the smaller the preset speed to be executed by the fan, the larger the diameter of the current air inlet pipe.

[0029] The present invention also provides an air supply device, which includes:

[0030] An air inlet interface capable of externally connecting air inlet pipes of various diameters;

[0031] A fan for supplying air to the air inlet interface;

[0032] A detection device for measuring the electrical parameters of the fan;

[0033] A controller connected to the detection device and configured to control the air supply device according to the above control method.

[0034] In a schematic embodiment, the detection device is a current measurement device or a power measurement device.

[0035] In a schematic embodiment, the air supply device is a fresh air fan or an air conditioner with a fresh air function.

[0036] In the technical solution of the present invention, the diameter of the current air inlet pipe can be automatically identified according to the electrical parameters of the fan at the test speed, without manually configuring the parameters of the diameter of the current air inlet pipe, reducing manual operation and improving the user experience; at the same time, the preset speed corresponding to the diameter can be obtained according to the diameter of the current air inlet pipe, and the fan is driven to rotate at the preset speed. If the diameter of the current air inlet pipe is large, the fan can operate at a lower preset speed, and the air outlet volume will not be too high, so as to avoid generating excessive noise; if the diameter of the current air inlet pipe is small, the fan can operate at a higher preset speed, and the air outlet volume will not be too small, so as to avoid the problem of too small air outlet speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without creative efforts.

[0038] Figure 1 Front view schematic diagram of the air supply device for implementing the present invention;

[0039] Figure 2 Schematic diagram of the connection of the control module of the air supply device for implementing the present invention;

[0040] Figure 3 Flowchart of the control method of the air supply device for implementing the present invention;

[0041] Figure 4 Left view schematic diagram of the air supply device for implementing the present invention;

[0042] Figure 5 is Figure 4 Enlarged schematic diagram of part E of;

[0043] Figure 6 Left view schematic diagram of the air supply device for implementing the present invention;

[0044] Figure 7 is Figure 6 Enlarged schematic diagram of part F of;

[0045] Explanation of the reference numerals in the drawings:

[0046] Label Name Label Name 1 Chassis 2 Air inlet duct 10 Fan 11 Air inlet interface 111 Cylinder 12 Detection device 13 Controller

[0047] The realization, functional features and advantages of the object of the present invention will be further described in conjunction with the embodiments with reference to the drawings. Specific embodiments

[0048] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0049] As Figure 1 shown, Figure 1 Shows an air supply device, which can be a fresh air fan, an air conditioner with a fresh air function, an air purifier or an exhaust fan. The air supply device includes: a chassis 1, a fan 10, an air inlet interface 11, a controller 13 and a detection device 12.

[0050] The blower 10 is provided inside the chassis 1. The air inlet interface 11 extends out of the chassis 1. The blower 10 is connected to the air inlet interface 11 through a pipeline. The blower 10 includes a motor and an impeller. The impeller is sleeved on the main shaft of the motor. The motor can drive the impeller to rotate, and when the impeller rotates, air is sent to the air outlet 11. The controller 13 is electrically connected to the motor of the blower 10. The controller 13 can control the start and stop of the motor and the rotation speed of the motor. Thus, the controller 13 can drive the blower 10 to send air to the air inlet interface 11 and can control the rotation speed of the blower 10.

[0051] As Figure 2 shown, the detection device 12 is electrically connected to the controller 13. The detection device 12 is used to detect the electrical parameters of the blower 10 and send the detected electrical parameters to the controller 13. The detection device 12 can be connected to the power supply line of the blower 10. The detection device 12 can be a current measuring device, and the electrical parameter can be the input current value of the blower 10. The detection device 12 can also be a power measuring device, and the electrical parameter can also be the input power value of the blower 10.

[0052] The air inlet interface 11 can be externally connected to air inlet pipes 2 of various pipe diameters, and the air supply device sends air into the inner chamber through the air inlet pipe 2. The air inlet interface 11 can be externally connected to air inlet pipes 2 of different pipe diameters in the following ways:

[0053] The air inlet interface 11 can be connected to air inlet pipes 2 of different pipe diameters through different adapters; the air inlet pipe 3 can be a flexible pipe, and one end of air inlet pipes 3 of different pipe diameters can be tied to the air inlet interface 11.

[0054] As Figure 3 shown, this embodiment also proposes a control method for the air supply device. This control method is implemented based on the above air supply device, and this control method includes the following steps:

[0055] Step S1: The controller 13 receives a start air supply instruction, drives the blower 10 of the air supply device to rotate at a test rotation speed, and measures the electrical parameters of the blower 10;

[0056] The start air supply instruction is used to instruct the controller 13 to drive the blower 10 to supply air. The start air supply instruction can be sent by the user to the controller 13 through the control panel or remote control of the air supply device. The start air supply instruction can also be sent through a mobile terminal, and the mobile terminal and the controller 13 can be connected through a local area network or the Internet. The mobile terminal can be a mobile phone or a tablet computer.

[0057] After receiving the start air supply instruction, the controller 13 drives the blower 10 of the air supply device to rotate, and the rotation speed of the blower 10 is a preset test rotation speed. After the blower 10 rotates smoothly at the test rotation speed, the controller 13 measures the electrical parameters of the blower 10 through the detection device 12. The electrical parameter is the input current value of the blower or the input power value of the blower.

[0058] Step S2: The controller 13 uses the pipe diameter corresponding to the power parameter as the pipe diameter of the current air inlet pipe.

[0059] The current air inlet pipe 2 is the air inlet pipe 2 that is currently connected to the air inlet interface 11 of the air supply device. The power parameter of the fan 10 is negatively correlated with the pipe diameter of the current air inlet pipe 2. The larger the pipe diameter of the air inlet pipe 2, the smaller the air resistance of the fan 10 for air supply, the smaller the load of the fan 10, and the smaller the power parameter of the fan 10, that is, both the input current value and the input power value of the fan are smaller. The air inlet interface 11 of the air supply device can be externally connected to air inlet pipes 2 with various pipe diameters. The corresponding relationship between the pipe diameters of different air inlet pipes and the power parameters of the fan at the test speed can be pre-calibrated. The larger the pipe diameter corresponding to the lower power parameter. The corresponding relationship between the pipe diameter of the air inlet pipe and the power parameter of the fan at the measured speed is pre-stored in the controller 13.

[0060] The controller 13 can query the pipe diameter corresponding to the power parameter from the corresponding relationship between the power parameter and the pipe diameter according to the actually measured power parameter, and use this pipe diameter as the pipe diameter of the current air inlet pipe.

[0061] S3: The controller 13 obtains the preset speed corresponding to the pipe diameter of the current air inlet pipe 2.

[0062] In the controller 13, the corresponding relationship between various pipe diameters of the air inlet pipe 2 and multiple preset speeds of the fan 10 is pre-stored. The corresponding relationship between the pipe diameter of the air inlet pipe 2 and the preset speed of the fan 10 can be stored in the form of a table. The preset speed has a decreasing trend as the pipe diameter increases. The controller 13 can query the preset speed corresponding to the pipe diameter according to the pipe diameter.

[0063] For example, the pipe diameters of the air inlet pipes 2 that can be externally connected to the air inlet interface 11 are d1, d2, and d3 respectively, where d1 < d2 < d3. The multiple preset speeds are N1, N2, and N3 respectively. The pipe diameter d1 corresponds to the preset speed N1, the pipe diameter d2 corresponds to the preset speed N2, and the pipe diameter d3 corresponds to the preset speed N3. The relationship between N1, N2, and N3 can be N1 = N2 > N3, or N1 > N2 > N3, or N1 > N2 = N3. When the pipe diameter of the current air inlet pipe 2 is d1, the preset speed is N1.

[0064] It should be noted that the pipe diameters d1, d2, and d3 of the air inlet pipe 2 can be specific values respectively, or can be ranges of values respectively.

[0065] S4: The controller 13 drives the fan 10 to supply air to the air inlet interface 11 at the preset speed corresponding to the pipe diameter of the current air inlet pipe 2.

[0066] In this embodiment, the controller 13 can automatically identify the diameter of the current air inlet pipe according to the power parameters of the fan at the test speed, without the need for manual parameter configuration of the diameter of the current air inlet pipe, reducing manual operation and improving the user experience. The controller 13 can also obtain the preset speed corresponding to the diameter of the current air inlet pipe according to the diameter of the current air inlet pipe, and drive the fan 10 to rotate at the preset speed. If the diameter of the current air inlet pipe 2 is large, the fan 10 can operate at a lower preset speed, and the air output volume will not be too high, so that excessive noise can be avoided; if the diameter of the current air inlet pipe 2 is small, the fan 10 can operate at a higher preset speed, and the air output volume will not be too small, so that the problem of too small air output speed can be avoided.

[0067] In a schematic embodiment, the controller 13 stores multiple numerical ranges of power parameters. The numerical range is a numerical range of power parameters. The numerical range can be a continuous numerical range, such as [1, 2]. The numerical ranges of multiple numerical ranges do not overlap with each other. The number of numerical ranges is the same as the number of types of air inlet pipes 2 with different diameters that the air inlet interface 11 can be externally connected to. The multiple numerical ranges correspond to multiple diameters one by one. The larger the diameter, the smaller the value in the numerical range corresponding to the diameter.

[0068] For example, the diameters of the air inlet pipes 2 that the air inlet interface 11 can be externally connected to are d1, d2, and d3 respectively, where d1 < d2 < d3. The multiple numerical ranges are [0, F1], (F1, F2], and (F2, +∞) respectively, where 0 < F1 < F2. Then the values in [0, F1], (F1, F2], and (F2, +∞) increase in sequence. [0, F1] corresponds to the diameter d1, (F1, F2] corresponds to the diameter d2, and (F2, +∞) corresponds to the diameter d3.

[0069] Step S2 includes steps S21 to S23.

[0070] Step S21: The controller 13 determines the numerical range in which the measured power parameter is located;

[0071] After measuring the power parameter, the controller 13 compares the value of the power parameter with multiple numerical ranges in sequence. When the value of the power parameter falls within a numerical range, then this numerical range is the numerical range in which the power parameter is located.

[0072] Step S22: The controller 13 obtains the diameter of the air inlet pipe corresponding to this numerical range, and uses this diameter as the diameter of the current air inlet pipe;

[0073] After determining the numerical range in step S21, the controller 13 queries the diameter corresponding to this numerical range according to the corresponding relationship between the numerical range and the diameter, and then uses this diameter as the diameter of the current air inlet pipe.

[0074] In an exemplary embodiment, multiple wind speed gears may be configured in the controller 13. The multiple wind speed gears may be, for example, "strong gear", "high gear", "medium gear", and "low gear" respectively. The preset speeds corresponding to the same diameter of the air inlet pipe 2 are different under different wind speed gears. For example, when the diameter of the air inlet pipe 2 is the smallest, the preset speeds corresponding to "strong gear", "high gear", "medium gear", and "low gear" increase in sequence.

[0075] Under the same wind speed gear, for example, under any one of the wind speed gears of "strong gear", "high gear", "medium gear", and "low gear", the lower the preset speed, the larger the diameter of the air inlet pipe 2. For example, the diameters of the air inlet pipes 2 that the air inlet interface 11 can be externally connected to are d1, d2, and d3 respectively, where d1 < d2 < d3. Under the "strong gear", the multiple preset speeds are N1, N2, and N3 respectively. The pipe diameter d1 corresponds to the preset speed N1, the pipe diameter d2 corresponds to the preset speed N2, and the pipe diameter d3 corresponds to the preset speed N3. The relationship among N1, N2, and N3 is N1 > N2 > N3.

[0076] In step S2, obtaining the preset speed corresponding to the current diameter of the air inlet pipe includes: obtaining the preset speed corresponding to the current diameter of the air inlet pipe under the set wind speed gear.

[0077] In step S1, the start air supply instruction includes information on the set wind speed gear. For example, when the user sends a start air supply instruction to the controller 13 through a remote controller or a mobile terminal, the remote controller selects a wind speed gear as the set wind speed gear and attaches it to the start air supply instruction.

[0078] Setting multiple wind speed gears allows the user to independently set the air supply speed of the air supply device. At the same time, under the same wind speed gear, the lower the preset speed, the larger the diameter of the air inlet pipe 2, which can avoid the problem of excessive noise caused by a too large diameter of the current air inlet pipe 2 and the problem of too small air supply speed caused by a too small diameter of the current air inlet pipe 2 at this wind speed gear.

[0079] In an exemplary embodiment, multiple wind speed gears may be configured in the controller 13. The multiple wind speed gears may be, for example, "strong gear", "high gear", "medium gear", and "low gear" respectively.

[0080] The controller 13 is also configured with multiple speed groups. The number of speed groups is the same as the number of types of air inlet pipes 2 with different diameters that the air inlet interface 11 can connect to, and the speed groups correspond to the diameters of the air inlet pipes 2 one by one. Each speed group is provided with multiple preset speeds, and the number of preset speeds in each speed group is the same as the number of wind speed gears. The multiple preset speeds in each group of wind speeds correspond to the wind speed gears one by one. In each group of wind speeds, as the wind speed gear increases, the value of the preset speed corresponding to this wind speed gear also increases.

[0081] All the preset speeds corresponding to at least one wind speed gear tend to decrease as the pipe diameter corresponding to the speed group where they are located increases.

[0082] For example, the pipe diameters of the air inlet pipes 2 that can be installed on the air inlet interface 11 are d1, d2, and d3 respectively, and d1 < d2 < d3. The multiple speed groups are speed group A, speed group B, and speed group C. The pipe diameter d1 of the air inlet pipe 2 corresponds to speed group A; the pipe diameter d2 of the air inlet pipe 2 corresponds to speed group B; the pipe diameter d3 of the air inlet pipe 2 corresponds to speed group C.

[0083] The preset speeds included in speed group A are a1, a2, a3, and a4, and a1 > a2 > a3 > a4. The corresponding relationships between the wind speed gears and the multiple preset speeds included in speed group A are: "strong gear" corresponds to the preset speed a1 in speed group A, "high gear" corresponds to the preset speed a2 in speed group A, "medium gear" corresponds to the preset speed a3 in speed group A, and "low gear" corresponds to the preset speed a4 in speed group A.

[0084] The preset speeds included in speed group B are b1, b2, b3, and b4, and b1 > b2 > b3 > b4. The corresponding relationships between the wind speed gears and the multiple preset speeds included in speed group B are: "strong gear" corresponds to the preset speed b1 in speed group B, "high gear" corresponds to the preset speed b2 in speed group B, "medium gear" corresponds to the preset speed b3 in speed group B, and "low gear" corresponds to the preset speed b4 in speed group B.

[0085] The preset speeds included in speed group C are c1, c2, c3, and c4, and c1 > c2 > c3 > c4. The corresponding relationships between the wind speed gears and the multiple preset speeds included in speed group C are: "strong gear" corresponds to the preset speed c1 in speed group C, "high gear" corresponds to the preset speed c2 in speed group C, "medium gear" corresponds to the preset speed c3 in speed group C, and "low gear" corresponds to the preset speed c4 in speed group C.

[0086] Among them, there is at least one of the following configurations in the controller 13: the preset speeds a1, b1, and c1 tend to decrease, for example, a1 > b1 > c1, or a1 > b1 = c1, or a1 = b1 > c1; the preset speeds a2, b2, and c2 tend to decrease, for example, a2 > b2 > c2, or a2 > b2 = c2, or a2 = b2 > c2; the preset speeds a3, b3, and c3 tend to decrease, for example, a3 > b3 > c3, or a3 > b3 = c3, or a3 = b3 > c3; the preset speeds a4, b4, and c4 tend to decrease, for example, a4 > b4 > c4, or a4 > b4 = c4, or a4 = b4 > c4.

[0087] In step S1, the start air supply instruction includes information on the set air speed gear. For example, when the user sends a start air supply instruction to the controller 13 through a remote controller or a mobile terminal, the remote controller selects an air speed gear as the set air speed gear and attaches it to the start air supply instruction. This air speed gear can be the air speed gear set when the air supply device was started last time. For example, if the air speed gear was switched to "medium gear" when the air supply device was started last time, then the air supply device will default to start at "medium gear" the next time it is started.

[0088] Step S3 includes S31 to S32.

[0089] Step S31: The controller 13 obtains the corresponding rotation speed group according to the current diameter of the air inlet pipe and enters step S32;

[0090] Step S32: The controller 13 selects a preset rotation speed corresponding to the set air speed gear from the rotation speed group corresponding to the current diameter of the air inlet pipe according to the set air speed gear in the start air supply instruction and enters step S4.

[0091] For example, the diameter of the current air inlet pipe is d1 and the set air speed gear is "medium gear". When the controller 13 executes step S31, it obtains the rotation speed group A corresponding to this diameter d1, and when executing step S22, it selects the preset rotation speed a3 from the rotation speed group A. This preset rotation speed a3 is the preset rotation speed that the fan is to execute in step S3.

[0092] Setting multiple air speed gears allows the user to independently set the air supply speed of the air supply device. At the same time, for at least one air speed gear, all the corresponding preset rotation speeds tend to decrease as the diameter of the air inlet pipe 2 corresponding to the rotation speed group where it is located increases. This can avoid the problem of excessive noise caused by a relatively large diameter of the current air inlet pipe 2 and the problem of too low air supply speed caused by a relatively small diameter of the current air inlet pipe 2 at this air speed gear.

[0093] In another exemplary embodiment, multiple air speed gears can be configured in the controller 13. The multiple air speed gears can be, for example, "strong gear", "high gear", "medium gear", and "low gear" respectively.

[0094] The controller 13 is also configured with a basic rotation speed group and multiple change amount groups. The basic rotation speed group corresponds to an air inlet pipe 2 of a certain diameter that can be connected to an air inlet interface 11. The number of change amount groups is the same as the number of types of the remaining air inlet pipes 2 with different diameters, and the change amount groups correspond to the remaining air inlet pipes 2 one by one.

[0095] Multiple preset rotation speeds are set in the basic rotation speed group. The number of preset rotation speeds in the basic rotation speed group is the same as the number of air speed gears, and the multiple preset air speeds correspond to the air speed gears one by one.

[0096] Each set of variation quantities has multiple variation quantities. The number of variation quantities in each set of variation quantities is the same as the number of wind speed gears, and the multiple variation quantities correspond to the wind speed gears one by one. This variation quantity can be a positive value or a negative value.

[0097] For example, the pipe diameters of the air inlet pipes 2 that can be installed at the air inlet interface 11 are d1, d2, and d3 respectively, where d1 < d2 < d3. The pipe diameter corresponding to the basic speed group is the pipe diameter d1, and the preset speeds included in the basic speed group are a1, a2, a3, and a4 respectively, where a1 > a2 > a3 > a4. The corresponding relationship between the multiple preset speeds and the wind speed gears is: "strong gear" corresponds to the preset speed a1 in the speed group A, "high gear" corresponds to the preset speed a2 in the speed group A, "medium gear" corresponds to the preset speed a3 in the speed group A, and "low gear" corresponds to the preset speed a4 in the preset speed group A.

[0098] The multiple sets of variation quantities are respectively the variation quantity group B and the variation quantity group C. The pipe diameter d2 of the air inlet pipe 2 corresponds to the variation quantity group B; the pipe diameter d3 of the air inlet pipe 2 corresponds to the variation quantity group C.

[0099] The variation quantities included in the variation quantity group B are respectively Δb1, Δb2, Δb3, and Δb4, where Δb1 > Δb2 > Δb3 > Δb4. The corresponding relationship between the wind speed gears and the multiple variation quantities is: "strong gear" corresponds to the variation quantity Δb1 in the speed group B, "high gear" corresponds to the variation quantity Δb2 in the speed group B, "medium gear" corresponds to the variation quantity Δb3 in the speed group B, and "low gear" corresponds to the variation quantity Δb4 in the preset speed group B.

[0100] The variation quantities included in the variation quantity group C are respectively Δc1, Δc2, Δc3, and Δc4, where Δc1 > Δc2 > Δc3 > Δc4. The corresponding relationship between the wind speed gears and the multiple variation quantities is: "strong gear" corresponds to the variation quantity Δc1 in the speed group C, "high gear" corresponds to the variation quantity Δc2 in the speed group B, "medium gear" corresponds to the variation quantity Δc3 in the speed group C, and "low gear" corresponds to the variation quantity Δc4 in the preset speed group C.

[0101] In step S1, the start air supply instruction includes information on the set wind speed gear. For example, when the user sends a start air supply instruction to the controller 13 through a remote controller or a mobile terminal, the remote controller selects a wind speed gear as the set wind speed gear and attaches it to the start air supply instruction. This wind speed gear can be the wind speed gear set when the air supply device was started last time. For example, if the wind speed gear was switched to "medium gear" when the air supply device was started last time, then the air supply device will be started with "medium gear" by default the next time it is started.

[0102] Step S3 includes S31a to S36a.

[0103] Step S31a: The controller 13 determines whether the current diameter of the air inlet pipe is the diameter corresponding to the basic speed group. If so, it proceeds to step S32a; otherwise, it proceeds to step S33a.

[0104] Step S32a: The controller 13 obtains the preset speed corresponding to the set wind speed gear from the basic speed group according to the set wind speed gear in the start air supply command, and uses this preset speed as the preset speed to be executed by the fan, and proceeds to step S4.

[0105] Step S33a: The controller 13 obtains the preset speed corresponding to the set wind speed gear from the basic speed group according to the set wind speed gear, and proceeds to step S34a.

[0106] Step S34a: The controller 13 obtains the change amount group corresponding to this diameter according to the current diameter of the air inlet pipe, and proceeds to step S35a.

[0107] Step S35a: The controller 13 obtains the change amount corresponding to the set wind speed gear from this change amount group according to the set wind speed gear in the start air supply command.

[0108] Step S36a: Add this change amount to this preset speed to obtain the preset speed to be executed by the fan, and proceed to step S4.

[0109] The preset speed to be executed by the fan is the speed at which the controller 13 drives the fan to rotate in step S4.

[0110] In this way, if the current diameter of the air inlet pipe is the diameter corresponding to the basic speed group, the preset speed corresponding to the set wind speed gear in the basic speed group is directly used as the preset speed to be executed by the fan in step S4. If the current diameter of the air inlet pipe is the diameter corresponding to the change amount group, the change amount corresponding to the set wind speed gear in this change amount group and the preset speed corresponding to the set wind speed gear in the basic speed group are obtained, and then this preset speed is added to this change amount to obtain the preset speed to be executed by the fan in step S4.

[0111] For example, when the current diameter of the air inlet pipe is d1 and the set wind speed gear is "medium gear", the controller 13 first determines whether the current diameter d1 of the air inlet pipe is the diameter corresponding to the basic speed group. After the controller 13 determines that the diameter d1 is the diameter corresponding to the basic speed group, it obtains the preset speed a3 corresponding to this "medium gear" from the basic speed group, and uses this preset speed a3 as the preset speed to be executed by the fan.

[0112] When the diameter of the current air inlet pipe is d2 and the set wind speed gear is "high gear", the controller on line 13 determines whether the diameter d2 of the current air inlet pipe is the diameter corresponding to the basic speed group. After the controller 13 determines that the diameter d2 is not the diameter corresponding to the basic speed group, it first obtains the preset speed a2 corresponding to the "high gear" from the basic speed group, and then obtains the change amount Δb2 corresponding to the "high gear" from the change amount group B corresponding to the diameter d2. Then, it calculates the sum of the preset speed a2 and the change amount Δb2, and takes the calculation result as the preset speed to be executed by the fan.

[0113] All the preset speeds corresponding to at least one wind speed gear tend to decrease as the diameter of the speed group they belong to increases. In this embodiment, there is at least one of the following configurations: the preset speed corresponding to the "strong gear" has a decreasing trend, a1 > (a1 + Δb1) > (a1 + Δc1), or a1 > (a1 + Δb1) = (a1 + Δc1), or a1 = (a1 + Δb1) > (a1 + Δc1); the preset speed corresponding to the "high gear" has a decreasing trend, for example, a2 > (a2 + Δb2) > (a2 + Δc2), or a2 > (a2 + Δb2) = (a2 + Δc2), or a2 = (a2 + Δb2) > (a2 + Δc2); the preset speed corresponding to the "medium gear" has a decreasing trend, for example, a3 > (a3 + Δb3) > (a3 + Δc3), or a3 > (a3 + Δb3) = (a3 + Δc3); the preset speed corresponding to the "low gear" has a decreasing trend, for example, a4 > b4 > c4, or a4 > b4 = c4, or a4 = b4 > c4.

[0114] Setting multiple wind speed gears allows users to independently set the air supply speed of the air supply device. At the same time, all the preset speeds corresponding to at least one wind speed gear tend to decrease as the diameter of the speed group they belong to increases, which can avoid the problem of excessive noise caused by a too large diameter of the current air inlet pipe 2 and the problem of too low air supply speed caused by a too small diameter of the current air inlet pipe 2 at this wind speed gear.

[0115] In an exemplary embodiment, as Figures 4 - 7 shown, the air inlet interface 11 is configured as a tubular structure. The air inlet interface 11 can be set as a straight pipe with a changing diameter along its extending direction. In the direction away from the box body 1, the diameter of the air inlet interface 11 tends to decrease.

[0116] The larger the diameter of the air inlet pipe 2, the closer the air inlet pipe 2 is to the box body 1 when the air inlet pipe 2 is sleeved on the air inlet interface 11.

[0117] In an exemplary embodiment, as Figure 4 、 5As shown, the air inlet interface 11 of the air supply device 1 is provided as a conical cylinder. The end with the larger diameter of the air inlet interface 11 faces the box body 1, and the end with the smaller diameter of the air inlet interface 11 faces away from the box body 1. The larger the pipe diameter of the air inlet pipe 2, the closer the air inlet pipe 2 is to the box body 1 when the air inlet pipe 2 is sleeved on the air inlet interface 11.

[0118] In another embodiment, as Figure 6 , 7 shown, the outer peripheral surface of the air inlet interface 11 is stepped, and the outer peripheral surface includes a plurality of cylindrical surfaces 111. The cylindrical surfaces 111 can be cylindrical surfaces. The diameters of the plurality of cylindrical surfaces 111 change sequentially from large to small. The cylindrical surface 111 closer to the box body 1 has a larger diameter. Air inlet pipes 2 with multiple pipe diameters correspond to the plurality of cylindrical surfaces 111 one by one, and each air inlet pipe 2 with a specific pipe diameter can be sleeved on the corresponding cylindrical surface 111.

[0119] It should be noted that the control method of the above air supply device can be applied to the air supply device of this embodiment, and any example in the explanation of the above control method can be used to explain the air supply device of this embodiment, which will not be elaborated here.

[0120] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative position relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0121] In addition, in the present invention, descriptions such as "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0122] In the present invention, unless otherwise clearly specified and limited, terms such as "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and can be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0123] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0124] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structural transformation made under the concept of the present invention by using the content of the specification and drawings of the present invention, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A control method for a air supply device, characterized in that, The air inlet interface of the air supply device can be externally connected to air inlet pipes of various pipe diameters, and the control method includes: Driving the fan of the air supply device to rotate at a test speed, and measuring the power parameters of the fan; Taking the pipe diameter preset and corresponding to the power parameters as the pipe diameter of the current air inlet pipe; Obtaining the preset speed corresponding to the pipe diameter of the current air inlet pipe; Driving the fan of the air supply device to supply air to the air inlet interface at the preset speed; One of the various pipe diameters corresponds to a basic speed group, and the remaining all pipe diameters correspond to multiple change amount groups one by one; The basic speed group includes multiple preset speeds respectively corresponding to various wind speed gears one by one; The change amount group includes multiple change amounts respectively corresponding to various wind speed gears one by one; The step of obtaining the preset speed corresponding to the current pipe diameter includes: When the pipe diameter of the current air inlet pipe is the pipe diameter corresponding to the basic speed group, selecting the preset speed corresponding to the set wind speed gear from the basic speed group as the preset speed to be executed by the fan; When the pipe diameter of the current air inlet pipe is not the pipe diameter corresponding to the basic speed group, selecting the change amount corresponding to the set wind speed gear from the change amount group corresponding to the pipe diameter of the current air inlet pipe, selecting the preset speed corresponding to the set wind speed gear from the basic speed group, and adding the preset speed and the change amount to obtain the preset speed to be executed by the fan; Under at least one wind speed gear, the smaller the preset speed to be executed by the fan, the larger the pipe diameter of the current air inlet pipe.

2. The control method according to claim 1, wherein The power parameter is the input current value of the fan or the input power value of the fan.

3. The control method according to claim 2, characterized in that, There are multiple non-overlapping numerical ranges of power parameters preset, and each numerical range corresponds to the pipe diameter of an air inlet pipe; Taking the pipe diameter corresponding to the power parameter as the pipe diameter of the current air inlet pipe includes: Determining the numerical range where the power parameter is located, obtaining the pipe diameter of the air inlet pipe corresponding to the numerical range, and taking the pipe diameter as the pipe diameter of the current air inlet pipe.

4. The control method according to claim 3, wherein At the test speed of the fan, the larger the pipe diameter, the smaller the value in the numerical range corresponding to the pipe diameter.

5. The control method according to any one of claims 1 to 4, characterized in that, Under the same wind speed gear, the larger the pipe diameter corresponding to the lower preset speed.

6. The control method according to claim 5, characterized in that, There are multiple wind speed gears, and the preset speeds corresponding to the same pipe diameter under different wind speed gears are different; The control method further includes: obtaining set wind speed gear information; The obtaining of the preset speed corresponding to the pipe diameter of the current air inlet pipe includes: obtaining the preset speed corresponding to the pipe diameter of the current air inlet pipe under the set wind speed gear.

7. An air supply device, characterized in that, Includes: An air inlet interface that can be externally connected to air inlet pipes of various pipe diameters; A fan for supplying air to the air inlet interface; A detection device for measuring the power parameters of the fan; A controller connected to the detection device and configured to control the air supply device according to the control method described in any one of claims 1 to 6.

8. The air supply device according to claim 7, characterized in that The detection device is a current measurement device or a power measurement device.

9. The air supply device according to claim 7 or 8, characterized in that, The air supply device is a fresh air fan or an air conditioner with a fresh air function.

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