Identification method and ventilation system

Abstract

An identification method for identifying the type of fan motor unit in an air blowing system comprising a fan motor unit, which has a motor, a fan, and a case, and which blows air to the outside, and a control unit, which controls the fan motor unit, said method including: a first step, in which the control unit outputs to the fan motor unit a first air volume command that is output when carrying out a control for causing the fan motor unit to operate normally; a second step, in which the control unit acquires a first velocity notification that is output from the fan motor unit in accordance with the output of the first air volume command; and a third step, in which the control unit identifies the type of the fan motor unit on the basis of the first air volume command and the first velocity notification, and outputs a type identification signal indicating the identified type.

Description

[Technical field]

[0001] The present disclosure relates to a method for identifying a type of a fan motor unit, and a blower system including a fan motor unit. [Background technology]

[0002] Patent Document 1 describes a fan motor unit that has a motor, a fan that rotates when the motor rotates, and a case that covers at least a part of the fan, and that blows air to the outside.

[0003] A conventional air blowing system includes a fan motor unit and a controller that controls the fan motor unit. The controller outputs an air volume command to the fan motor unit to control the volume of air blown by the fan motor unit, thereby enabling the fan motor unit to blow a desired volume of air.

[0004] Generally, in a fan motor unit, the relationship between an input air volume command and the volume of air blown varies depending on the type of fan motor unit.

[0005] Therefore, in order to achieve a desired volume of airflow in the air blowing system, the control unit needs to output an appropriate airflow command according to the type of fan motor unit. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] JP 2013-104365 A Summary of the Invention

[0007] Therefore, the present disclosure aims to provide a method for identifying the type of fan motor unit without the control unit outputting a special signal to identify the type of fan motor unit, and a blower system etc. that can execute the method.

[0008] A method for identifying the type of a fan motor unit in a ventilation system comprising a motor, a fan that rotates by rotation of the motor, and a case that covers at least a portion of the fan, the fan motor unit having an air flow command to control the volume of air blown by the fan motor unit, and the fan motor unit outputting a speed notification indicating the rotation state of the motor to the control unit, the method including a first step of the control unit outputting to the fan motor unit a first air flow command that is output when controlling the fan motor unit to operate normally, a second step of the control unit acquiring a first speed notification output from the fan motor unit in response to the output of the first air flow command, and a third step of the control unit identifying the type of the fan motor unit based on the first air flow command and the first speed notification, and outputting a type identification signal indicating the identified type.

[0009] According to another aspect of the present disclosure, a blowing system includes a fan motor unit having a motor, a fan that rotates by rotation of the motor, and a case covering at least a portion of the fan, and which blows air to the outside, and a control unit that controls the fan motor unit, wherein the control unit outputs an air volume command to the fan motor unit to control the volume of air blown by the fan motor unit, and the fan motor unit outputs a speed notification indicating the rotation state of the motor to the control unit, and when the control unit outputs a first air volume command to the fan motor unit when controlling the fan motor unit to operate normally, when a first speed notification is output from the fan motor unit in response to the first air volume command, the control unit identifies the type of the fan motor unit based on the first air volume command and the first speed notification, and outputs a type identification signal indicating the identified type.

[0010] There are provided a method for identifying the type of fan motor unit without a control unit outputting a special signal for identifying the type of fan motor unit, and a ventilation system capable of executing the method. [Brief description of the drawings]

[0011] [Figure 1] FIG. 1 is a block diagram showing an example of the configuration of a ventilation system according to the first embodiment. [Diagram 2] FIG. 2 is a schematic diagram showing an example of use of the air blowing system according to the first embodiment. [Diagram 3] FIG. 3 is a block diagram showing an example of the configuration of the fan motor unit according to the first embodiment. As shown in FIG. [Figure 4] FIG. 4 is a schematic diagram showing an example of a waveform of a Hall signal output by a Hall sensor and an example of a waveform of a speed notification according to the first embodiment. [Diagram 5] FIG. 5 is a schematic diagram showing an example of a waveform of an air volume command acquired by a microcomputer (microcontroller), that is, an example of a waveform of an air volume command output by a control unit according to the first embodiment. [Figure 6] FIG. 6 is a schematic diagram showing the relationship between the static pressure and the flow rate of the fan motor unit, the relationship between the rotation speed of the motor and the flow rate, and the operating point of the fan motor unit according to the first embodiment. [Figure 7] FIG. 7 is a block diagram illustrating an example of a configuration of a control unit according to the first embodiment. [Figure 8] FIG. 8 is a schematic diagram showing the relationship between the rotation speed of the motor and the flow rate in the unit A and the unit B according to the first embodiment. [Figure 9] FIG. 9 is a schematic diagram showing the relationship between the duty of the airflow command and the rotation speed of the motor in unit A and unit B, determined in the second stage according to the first embodiment. [Figure 10] FIG. 10 is a schematic diagram showing the relationship between the duty of the airflow command and the frequency of the speed notification in unit A and unit B, determined in the third stage according to the first embodiment. [Figure 11A]FIG. 11A is a schematic diagram showing a waveform of a first speed notification output from unit A in response to a first airflow command when an airflow command output unit in embodiment 1 outputs a first airflow command to unit A. [Figure 11B] FIG. 11B is a schematic diagram showing a waveform of a first speed notification output from unit B in response to a first airflow command when the airflow command output section in embodiment 1 outputs a first airflow command to unit B. [Figure 12] FIG. 12 is a flowchart of the first identification process according to the first embodiment. [Figure 13] FIG. 13 is a block diagram illustrating an example of a configuration of a control unit according to the second embodiment. As shown in FIG. [Figure 14] FIG. 14 is a schematic diagram showing the relationship between the rotation speed of the motor and the flow rate in the unit B and the unit C according to the second embodiment. [Figure 15] FIG. 15 is a schematic diagram showing the relationship between the duty of the airflow command and the rotation speed of the motor in unit B and unit C, determined in the second stage according to the second embodiment. [Figure 16] FIG. 16 is a schematic diagram showing the relationship between the duty of the airflow command and the frequency of the speed notification in unit B and unit C, determined in the third stage according to the second embodiment. [Figure 17A] FIG. 17A is a schematic diagram showing a waveform of a first speed notification output from unit B in response to a first airflow command when an airflow command output unit in embodiment 2 outputs a first airflow command to unit B. [Figure 17B] FIG. 17B is a schematic diagram showing the waveform of a first speed notification output from unit C in response to a first airflow command when the airflow command output unit in embodiment 2 outputs a first airflow command to unit C. [Figure 18] FIG. 18 is a schematic diagram showing the relationship between the static pressure and the flow rate of the fan motor unit, the relationship between the rotation speed of the motor and the flow rate, and the operating point of the fan motor unit according to the third embodiment. [Figure 19]FIG. 19 is a block diagram illustrating an example of a configuration of a control unit according to the third embodiment. As shown in FIG. [Figure 20] FIG. 20 is a schematic diagram showing the relationship between the duty of the airflow command and the frequency of the speed notification for one type of fan motor unit, which is shown by the correspondence table stored in the correspondence holding unit according to the third embodiment. [Figure 21] FIG. 21 is a block diagram illustrating an example of a configuration of a control unit according to the fourth embodiment. As shown in FIG. [Figure 22] FIG. 22 is a schematic diagram illustrating how the relationship between the airflow command and the speed notification changes due to an abnormality in the fan motor unit according to the fourth embodiment. [Figure 23] FIG. 23 is a flowchart of the second identification process according to the fourth embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] (How one aspect of the present disclosure was achieved) Hybrid vehicles, electric vehicles, and other vehicles equipped with large-capacity secondary batteries are equipped with a ventilation system for cooling the secondary batteries. This ventilation system is composed of a fan motor unit that blows air into the battery pack that stores the secondary batteries, and an ECU (Electronic Control Unit) that functions as a control unit that controls the fan motor unit.

[0013] The ECU outputs an air volume command to the fan motor unit to control the volume of air blown by the fan motor unit, depending on the temperature inside the battery pack detected by a temperature sensor arranged in the battery pack.

[0014] Generally, in a fan motor unit, the relationship between an input air volume command and the volume of air blown varies depending on the type of fan motor unit.

[0015] Therefore, in order to blow air at a desired volume, the ECU needs to output an appropriate air volume command according to the type of fan motor unit.

[0016] For example, if a fan motor unit has an interface that outputs an identification signal to the ECU in response to a special signal output from the ECU to identify the type of fan motor unit, the ECU can identify the type of the fan motor unit by outputting that special signal.

[0017] However, on the other hand, it is desirable that the fan motor unit used in the air blowing system be a general-purpose fan motor unit, without being limited to a specific fan motor unit having a special interface.

[0018] Therefore, the inventors conducted extensive research and experiments on a method for identifying the type of fan motor unit without the control unit (e.g., ECU) outputting a special signal for identifying the type of fan motor unit as described above. As a result, the inventors came up with the following identification method and a blower system capable of executing the method.

[0019] A method for identifying the type of a fan motor unit in a ventilation system comprising a motor, a fan that rotates by rotation of the motor, and a case that covers at least a portion of the fan, the fan motor unit having an air flow command to control the volume of air blown by the fan motor unit, and the fan motor unit outputting a speed notification indicating the rotation state of the motor to the control unit, the method including a first step of the control unit outputting to the fan motor unit a first air flow command that is output when controlling the fan motor unit to operate normally, a second step of the control unit acquiring a first speed notification output from the fan motor unit in response to the output of the first air flow command, and a third step of the control unit identifying the type of the fan motor unit based on the first air flow command and the first speed notification, and outputting a type identification signal indicating the identified type.

[0020] According to the above-described identification method, the control unit can identify the type of the fan motor unit by outputting to the fan motor unit the first air volume command that is output when controlling the fan motor unit to operate normally.

[0021] In this way, according to the above-described identification method, it is possible to identify the type of fan motor unit without outputting a special signal for identifying the type of fan motor unit.

[0022] In addition, the control unit may further retain correspondence information indicating the correspondence between the air volume command and the speed notification for each of the multiple types of fan motor units, and in the third step, when the correspondence between the first air volume command and the first speed notification corresponds to one type of fan motor unit among the multiple types of fan motor units based on the correspondence information, the control unit may output the type identification signal for identifying the one type of fan motor unit.

[0023] As a result, when a new type of fan motor unit is added to the specified targets, the correspondence relationship information held by the control unit can be updated.

[0024] In addition, the third step may further include a fourth step in which the control unit outputs an abnormality detection signal indicating that an abnormality related to the fan motor unit has been detected when the correspondence between the first airflow command and the first speed notification does not apply to any of the multiple types of fan motor units based on the correspondence information.

[0025] This allows any abnormality in the fan motor unit to be quickly discovered.

[0026] In addition, the rotation of the motor may be controlled by PWM (Pulse Width Modulation) control, the air volume command may be a PWM duty signal for controlling the rotation of the motor by PWM control, and the speed notification may be a pulse signal having a frequency n / 2 times the rotation frequency of the motor when the number of poles of the motor is n (n is an integer greater than or equal to 2).

[0027] This makes it possible to output a type identification signal based on the relationship between the PWM duty signal output by the control unit and the pulse signal output by the fan motor unit.

[0028] In addition, in the first step, the control unit may output the first airflow command having a duty within a range in which a relationship between the duty of the PWM duty signal and the frequency of the pulse signal is linear.

[0029] This makes it possible to output the type-specific signal relatively easily.

[0030] According to one embodiment of the present disclosure, the air blowing system includes a fan motor unit having a motor, a fan that rotates by rotation of the motor, and a case covering at least a portion of the fan, and blows air to the outside, and a control unit that controls the fan motor unit, wherein the control unit outputs an air volume command to the fan motor unit for controlling the volume of air blown by the fan motor unit, and the fan motor unit outputs a speed notification indicating the rotation state of the motor to the control unit, and when the control unit outputs a first air volume command to the fan motor unit when controlling the fan motor unit to operate normally, when a first speed notification is output from the fan motor unit in response to the first air volume command, the control unit outputs a type identification signal to identify the type of the fan motor unit based on the first air volume command and the first speed notification.

[0031] According to the above-described air blowing system, the control unit can identify the type of the fan motor unit by outputting a first air volume command to the fan motor unit when controlling the fan motor unit to operate normally.

[0032] In this manner, according to the above-described air blowing system, it is possible to identify the type of fan motor unit without outputting a special signal for identifying the type of fan motor unit.

[0033] In addition, the control unit may further retain correspondence information indicating the correspondence between the air volume command and the speed notification for each of a plurality of types of fan motor units, and when the correspondence between the first air volume command and the first speed notification corresponds to one type of fan motor unit among the plurality of types of fan motor units based on the correspondence information, output the type identification signal for identifying the one type of fan motor unit.

[0034] As a result, when a new type of fan motor unit is added to the specified targets, the correspondence relationship information held by the control unit can be updated.

[0035] In addition, the control unit may further output an abnormality detection signal indicating that an abnormality related to the fan motor unit has been detected when the correspondence between the first airflow command and the first speed notification does not apply to any of the multiple types of fan motor units based on the correspondence information.

[0036] This allows any abnormality in the fan motor unit to be quickly discovered.

[0037] Hereinafter, a specific example of a blower system according to one aspect of the present disclosure will be described with reference to the drawings. Each embodiment shown here shows one specific example of the present disclosure. Therefore, the numerical values, shapes, components, arrangement and connection of the components, steps (processes) and order of steps shown in the following embodiments are merely examples and are not intended to limit the present disclosure. Furthermore, each figure is a schematic diagram and is not necessarily a precise illustration.

[0038] In addition, a comprehensive or specific aspect of the present disclosure may be realized by a system, a method, an integrated circuit, a computer program, or a recording medium such as a computer-readable CD-ROM (Compact Disk Read Only Memory), or may be realized by any combination of a system, a method, an integrated circuit, a computer program, and a recording medium.

[0039] (Embodiment 1) <Configuration> FIG. 1 is a block diagram showing an example of the configuration of a ventilation system 1 according to the first embodiment.

[0040] As shown in FIG. 1, the air blowing system 1 includes a fan motor unit 20 that blows air to the outside, and a control unit 10 that controls the fan motor unit 20.

[0041] The control unit 10 outputs an air volume command S to the fan motor unit 20 for controlling the volume of air blown by the fan motor unit 20 .

[0042] Fan motor unit 20 blows air in response to an air volume command S output from control unit 10. Fan motor unit 20 has a motor (motor 21, described later, see FIG. 3) therein, and outputs a speed notification FG to control unit 10 indicating the rotation state of the motor.

[0043] FIG. 2 is a schematic diagram showing an example of use of the air blowing system 1. As shown in FIG.

[0044] 2, the air blowing system 1 is mounted, as an example, on an electric vehicle 110 powered by a large-capacity secondary battery. The air blowing system 1 is used to cool the secondary battery by blowing air into the inside of a battery pack 30 that stores the secondary battery. In this example, the control unit 10 is realized by an ECU 100 that controls the electric vehicle 110. More specifically, the control unit 10 is realized by a processor (not shown) included in the ECU 100 executing a program stored in a memory (not shown) included in the ECU 100.

[0045] FIG. 3 is a block diagram showing an example of the configuration of the fan motor unit 20. As shown in FIG.

[0046] As shown in FIG. 3, the fan motor unit 20 includes a motor 21, a fan 22, a case 23, a Hall sensor 25, a microcontroller 26, and a drive circuit .

[0047] The motor 21 is driven by three-phase AC power (described later) output from a drive circuit 28 to rotate.

[0048] The fan 22 is attached to the rotating shaft of the motor 21, and rotates with the rotation of the motor 21. Therefore, the fan 22 generates wind when the motor 21 rotates.

[0049] The case 23 covers at least a portion of the fan 22. The case 23 has a duct (not shown) that blows out the wind generated by the fan 22 to the outside. Thus, the fan motor unit 20 blows the wind generated by the fan 22 to the outside through the duct.

[0050] The hall sensor 25 is a sensor that detects a variation in the magnetic field in the motor 21 and outputs a hall signal H.

[0051] 4 is a schematic diagram showing an example of a waveform of a Hall signal H output by the Hall sensor 25 and an example of a waveform of a speed notification FG (frame ground) according to the embodiment 1. Here, the waveform of the Hall signal H will be described, and the waveform of the speed notification FG will be described later.

[0052] 4, the Hall signal H is a pulse signal whose signal level alternates between a "High" level and a "Low" level every time the electrical angle of the magnetic field in the rotating motor 21 changes by 180 degrees. The electrical angle of the magnetic field in the rotating motor 21 is n / 2 times the rotation angle of the rotor of the motor 21, where the number of poles of the motor 21 is n (n is an integer equal to or greater than 2). Therefore, the Hall signal H is a pulse signal whose frequency is n / 2 times the rotation frequency of the rotor of the motor 21.

[0053] Returning to FIG. 3, the description of the fan motor unit 20 will continue.

[0054] The microcomputer 26 acquires the air volume command S output from the control unit 10, converts the acquired air volume command S into a three-phase PWM (Pulse Width Modulation) signal that drives the motor 21, and outputs the signal to the drive circuit .

[0055] FIG. 5 is a schematic diagram showing an example of the waveform of air volume command S acquired by microcomputer 26, that is, air volume command S output by control unit 10 according to the first embodiment.

[0056] 5, the airflow command S is a PWM duty signal. Here, the airflow command S is a PWM duty signal with one cycle of 2 ms and a duty of x (%).

[0057] Returning to FIG. 3, the description of the fan motor unit 20 will continue.

[0058] The microcomputer 26 further acquires the Hall signal H output from the Hall sensor 25, converts the acquired Hall signal H into a speed notification FG, and outputs the speed notification FG to the control unit 10.

[0059] 4, the speed notification FG is a signal whose signal level changes from "High" level to "Low" level at the timing when the signal level of the Hall signal H changes from "High" level to "Low" level, and whose signal level changes from "Low" level to "High" level at the timing when the signal level of the Hall signal H changes from "Low" level to "High" level. Therefore, the speed notification FG is a pulse signal whose frequency is 2 / n times the rotation frequency of the rotor of the motor 21.

[0060] The microcomputer 26 described above can also be realized by other hardware, for example, a motor driving integrated circuit, so-called a driver IC (Integrated Circuit), or software.

[0061] In the above explanation, an example has been given in which the Hall sensor 25 is used as a means for detecting the rotation state of the motor 21. The means for detecting the rotation state of the motor 21 may be any other method as long as it can detect the rotation state of the motor 21. For example, as in the case of a brushless motor driven without using a Hall sensor, a method for detecting an induced voltage or a method for detecting a current flowing through a motor may be used. In other words, it is not always necessary to use the Hall sensor 25 to detect the rotation state of the motor 21.

[0062] Returning to FIG. 3, the description of the fan motor unit 20 will continue.

[0063] The drive circuit 28 generates three-phase AC power by switching the DC power with the three-phase PWM signal output from the microcomputer 26, and drives the motor 21 with the generated three-phase AC power.

[0064] With the above-mentioned configuration of the fan motor unit 20, the fan motor unit 20 blows air in accordance with the air volume command S output from the control unit 10 for controlling the air volume blown by the fan motor unit 20, and outputs a speed notification FG indicating the rotation state of the motor 21 to the control unit 10.

[0065] FIG. 6 is a graph showing the relationship between the static pressure P [Pa] and the flow rate Q [m 3 / h], the relationship between the rotation speed Sr [rpm] of the motor 21 and the flow rate Q [m 3 1 is a schematic diagram showing the relationship between the load current and the load current [V / h] and the operating points of the fan motor unit 20.

[0066] As shown in FIG. 6, when the operating point of the fan motor unit 20 is in a region where the static pressure P is relatively high, the load on the motor 21 is relatively low, and the relationship between the rotation speed Sr and the flow rate Q is linear. Hereinafter, the operating region of the fan motor unit 20 where the relationship between the rotation speed Sr and the flow rate Q is linear is also referred to as the "linear region T1". On the other hand, when the operating point of the fan motor unit 20 is in a region where the static pressure P is relatively low, the load on the motor 21 is relatively high, and the relationship between the rotation speed Sr and the flow rate Q is not linear. Hereinafter, the operating region of the fan motor unit 20 where the relationship between the rotation speed Sr and the flow rate Q is not linear is also referred to as the "nonlinear region T2". In the first embodiment, a case where the operating point of the fan motor unit 20 is limited to the linear region T1 is illustrated.

[0067] FIG. 7 is a block diagram showing an example of the configuration of the control unit 10 according to the first embodiment.

[0068] 7, control unit 10 has air volume command output unit 11, speed notification acquisition unit 12, identification unit 13, correspondence relationship storage unit 14, and characteristic storage unit 15. Control unit 10 is realized, for example, by a computer device including a processor (not shown) and a memory (not shown), and the processor executes a program stored in the memory.

[0069] The characteristic storage unit 15 stores, for each of the types of the plurality of fan motor units, the duty [%] of the air volume command S output to the fan motor unit and the air flow rate Q [m 3 The "air volume command-flow rate characteristic" showing the relationship between the air volume command and the flow rate [air volume command-flow rate characteristic] is stored in the memory.

[0070] The air volume command output unit 11 determines the volume of air to be blown by the fan motor unit 20. The air volume command output unit 11 references the "air volume command-flow rate characteristics" for the type of fan motor unit 20 currently connected to the control unit 10, which are stored in the characteristics holding unit 15, and generates an air volume command S for causing the fan motor unit 20 to blow air at the determined air volume. The air volume command output unit 11 outputs the generated air volume command S to the fan motor unit 20.

[0071] For example, when a temperature sensor for detecting temperature is disposed inside the battery pack 30, the air volume command output unit 11 may determine the air volume to be blown by the fan motor unit 20 in accordance with the temperature inside the battery pack detected by the temperature sensor. Alternatively, for example, when the control unit 10 has a function of accepting an operation by a user who uses the air blowing system 1, the air volume command output unit 11 may determine the air volume to be blown by the fan motor unit 20 in accordance with the operation by the user accepted by the control unit 10.

[0072] For example, when the control unit 10 has a function of accepting an operation by a user who uses the air blowing system 1, the air volume command output unit 11 may identify the type of fan motor unit 20 currently connected to the control unit 10 in response to the user operation accepted by the control unit 10. Alternatively, the air volume command output unit 11 may identify the type of fan motor unit 20 currently connected to the control unit 10 based on a type identification signal (described later) output from the identification unit 13. The type identification signal output from the control unit 10 is output into the ECU, for example, as shown in FIG. 2. Specifically, the type identification signal is output to a determination unit (not shown) or the like provided in the ECU.

[0073] The speed notification acquisition unit 12 acquires the speed notification FG output from the fan motor unit 20.

[0074] The correspondence holding unit 14 holds a correspondence table indicating the correspondence between the air volume command S and the speed notification FG for each of the multiple types of fan motor units. The correspondence table is created in advance. In the first embodiment, a case is illustrated in which the multiple types of fan motor units covered by the correspondence table are different from each other in at least one of the shape of the fan and the shape of the case, but have the same number of poles of the motor. That is, the multiple types of fan motor units covered by the correspondence table held by the correspondence holding unit 14 are different from each other in at least one of the shape of the fan and the shape of the case, but have the same number of poles of the motor.

[0075] A specific example of a method for creating the correspondence table held by the correspondence holding unit 14 will be described below with reference to the drawings. In the following, the multiple types of fan motor units will be described as two types of fan motor units, a fan motor unit A (hereinafter also referred to as "unit A") having a motor with 10 poles, and a fan motor unit B (hereinafter also referred to as "unit B") having a motor with 10 poles, as an example. However, the multiple types of fan motor units do not need to be limited to the two types of fan motor units A and B, as long as they are different from each other in at least one of the shape of the fan and the shape of the case, but have the same number of poles of the motor.

[0076] The duty of the air volume command S and the motor rotation speed Sr have the following relationship: At the minimum duty Smin, the motor 21 rotates at the minimum controllable rotation speed Srmin. At the maximum duty Smax, the motor 21 rotates at the maximum controllable rotation speed Srmax.

[0077] The following description will be given taking as an example a motor 21 in which the range of controllable rotation speeds of the motor, i.e., the minimum rotation speed Srmin to the maximum rotation speed Srmax, can be realized in a range of a minimum duty of 10% to a maximum duty of 90%. Note that the minimum and maximum duties that realize the minimum and maximum rotation speeds Srmin to Srmax are not limited to 10% and 90%. These values ​​are derived appropriately from the specifications of the motor to be used.

[0078] FIG. 8 shows the relationship between the rotation speed Sr [rpm] and the flow rate Q [m 3 1 is a schematic diagram showing the relationship between [0.15% / h] and [0.25% / h].

[0079] As described above, the operating points of unit A and unit B are in the linear region T1 (see FIG. 6). Therefore, as shown in FIG. 8, the relationship between the rotation speed Sr and the flow rate Q in unit A and unit B is linear. However, since unit A and unit B differ from each other in at least one of the shape of the fan and the shape of the case, the flow rates Q are different between unit A and unit B even if the motors rotate at the same rotation speed Sr.

[0080] First, in the first stage, when the maximum flow rate required in the blower system 1 is Qmax, the motor rotation speed Sr for realizing the flow rate Qmax in the unit A is calculated. A and the motor speed Sr to realize the flow rate Qmax in unit B. B It is decided that:

[0081] Next, in the second stage, for unit A, when the duty of the air volume command S becomes 90%, the motor rotation speed Sr becomes Sr A (The maximum rotation speed Srmax mentioned above. The same applies below.) The relationship between the air volume command S and the rotation speed Sr is determined so that the motor rotation speed Sr is Sr B (The above-mentioned maximum rotation speed Srmax. The same applies below.) The relationship between the air volume command S and the rotation speed Sr is determined.

[0082] FIG. 9 is a schematic diagram showing the relationship between the duty [%] of the airflow command S and the motor rotation speed Sr [rpm] in unit A and unit B determined in the second stage according to the first embodiment.

[0083] As described above, the relationship between the frequency of the speed notification FG, i.e., the frequency of the Hall signal H, and the rotation frequency of the motor is such that the frequency of the speed notification FG is the motor rotation frequency x the number of poles of the motor (here, 10) x 1 / 2. Finally, using this relationship, in the third stage, the relationship between the duty [%] of the airflow command S and the frequency [Hz] of the speed notification FG in units A and B is calculated based on the relationship between the duty [%] of the airflow command S and the motor rotation speed Sr [rpm] in units A and B determined in the second stage.

[0084] FIG. 10 is a schematic diagram showing the relationship between the duty [%] of the airflow command S and the frequency [Hz] of the speed notification FG in the unit A and the unit B, determined in the third stage according to the first embodiment.

[0085] The correspondence relationship storage unit 14 pre-stores a correspondence table indicating the relationship between the duty [%] of the air volume command S and the frequency [Hz] of the speed notification FG in the unit A and the unit B calculated in the third stage.

[0086] 10, the duty [%] of the airflow command S and the frequency [Hz] of the speed notification FG are linearly related. This is because, as described above, in the air blowing system 1, the operating point of the fan motor unit 20 is limited to the linear region T1. In this way, the airflow command output unit 11 outputs the first airflow command S having a duty in a range in which the duty of the airflow command S, which is a PWM duty signal, and the frequency of the speed notification FG, which is a pulse signal, are linearly related.

[0087] Returning to FIG. 7, the description of the control unit 10 will be continued.

[0088] When the air volume command output unit 11 outputs the first air volume command S to the fan motor unit 20 when controlling the fan motor unit 20 to operate normally, and when the first speed notification FG is output from the fan motor unit 20 in response to the first air volume command S, the specifying unit 13 specifies the type of the fan motor unit 20 based on the first air volume command S and the first speed notification FG, and outputs a type specifying signal indicating the specified type. More specifically, based on the correspondence table held in the correspondence holding unit 14, when the correspondence between the first air volume command S and the first speed notification FG corresponds to one type of fan motor unit among the multiple types of fan motor units targeted by the correspondence table, the specifying unit 13 specifies the one type of fan motor unit, and outputs a type specifying signal indicating the specified type. The type specifying signal output from the control unit 10 is output, for example, to an ECU as shown in FIG. 2. Specifically, the type specifying signal is output to a determination unit (not shown) or the like provided in the ECU.

[0089] Here, the first air volume command S output when controlling the fan motor unit 20 to operate normally refers to the air volume command S output by the control unit 10 to cause the fan motor unit 20 to output a specific air volume within the range of air volumes specified in the ventilation system 1.

[0090] Fig. 11A is a schematic diagram showing a waveform of a first speed notification FG output from unit A in response to a first airflow command S when airflow command output unit 11 according to embodiment 1 outputs a first airflow command S to unit A. Fig. 11B is a schematic diagram showing a waveform of a first speed notification FG output from unit B in response to a first airflow command S when airflow command output unit 11 according to embodiment 1 outputs a first airflow command S to unit B.

[0091] As shown in FIGS. 11A and 11B, when the fan motor unit 20 is unit A and when the fan motor unit 20 is unit B, the frequency of the first speed notification signal FG differs from each other.

[0092] Based on the correspondence table stored in the correspondence storage unit 14, the identification unit 13 outputs a type identification signal for identifying unit A when the relationship between the first airflow command S and the first speed notification FG corresponds to unit A, and outputs a type identification signal for identifying unit B when the relationship between the first airflow command S and the first speed notification FG corresponds to unit B.

[0093] <Operation> The operation of the ventilation system 1 having the above configuration will be described below.

[0094] The air blowing system 1 executes a first identification process to output a type identification signal.

[0095] FIG. 12 is a flowchart of the first identification process according to the first embodiment.

[0096] The first identification process may be started when a predetermined time has elapsed since the blowing system 1 was started, or when the replacement work of the fan motor unit 20 has been completed, or may be started periodically at predetermined intervals.

[0097] When the first identification process is started, the air volume command output unit 11 outputs to the fan motor unit 20 a first air volume command S to be output when controlling the fan motor unit 20 to operate normally (step S100).

[0098] When the first air volume command S is output, the microcontroller 26 acquires the first air volume command S. The microcontroller 26 converts the acquired air volume command S into a three-phase PWM signal that drives the motor 21. The microcontroller 26 outputs the converted three-phase PWM signal to the drive circuit 28 (step S110).

[0099] When the three-phase PWM signal is output, the drive circuit 28 generates three-phase AC power by switching the DC power with the three-phase PWM signal. The drive circuit 28 drives the motor 21 with the generated three-phase AC power. Then, the motor 21 rotates in response to the three-phase PWM signal (step S120).

[0100] When the motor 21 rotates, the Hall sensor 25 detects a change in the magnetic field in the motor 21 and outputs a first Hall signal H.

[0101] When the first Hall signal H is output, the microcomputer 26 acquires the first Hall signal H. The acquired first Hall signal H is converted into a first speed notification FG. The microcomputer 26 outputs the converted first speed notification FG to the control unit 10 (step S130).

[0102] When the first speed notification FG is output, the speed notification acquisition unit 12 acquires the first speed notification FG (step S140).

[0103] When the first speed notification FG is acquired, the identification unit 13 identifies the type of the fan motor unit 20 based on the first air volume command S and the first speed notification FG, and outputs a type identification signal indicating the identified type (step S150). At this time, based on the correspondence table held in the correspondence holding unit 14, when the correspondence between the first air volume command S and the first speed notification FG corresponds to one type of fan motor unit among the multiple types of fan motor units targeted by the correspondence table, the identification unit 13 outputs a type identification signal for identifying the one type of fan motor unit.

[0104] When the process of step S150 ends, the ventilation system 1 ends the first identification process.

[0105] <Consideration> According to the air blowing system 1, the control unit 10 can identify the type of fan motor unit 20 by outputting a first air volume command to the fan motor unit when controlling the fan motor unit 20 to operate normally.

[0106] In this way, according to the air blowing system 1, it is possible to identify the type of the fan motor unit 20 without outputting a special signal for identifying the type of the fan motor unit 20.

[0107] According to the air blowing system 1, when a new type of fan motor unit is added to the specific targets, the correspondence table held by the correspondence holding unit 14 can be updated to accommodate the addition.

[0108] As described above, in the air blowing system 1, the control unit 10 outputs the first air volume command S having a duty in a range in which the relationship between the duty of the air volume command S, which is a PWM duty signal, and the frequency of the speed notification FG, which is a pulse signal, is linear.

[0109] Therefore, the control unit 10 can output the type identification signal relatively easily.

[0110] (Embodiment 2) The following describes the air blowing system according to embodiment 2. Here, regarding the air blowing system according to embodiment 2, components similar to those of the air blowing system 1 according to embodiment 1 have already been described, so they are given the same reference numerals and detailed descriptions thereof are omitted.

[0111] The air blowing system 1 according to the first embodiment is a configuration example illustrating a case where the multiple types of fan motor units covered by the correspondence table have at least one of different fan shapes and case shapes, but the number of poles of the motors is the same. In contrast, the air blowing system according to the second embodiment is a configuration example illustrating a case where the multiple types of fan motor units covered by the correspondence table have at least one of different fan shapes and case shapes, but the number of poles of the motors is different.

[0112] In the second embodiment, similarly to the first embodiment, a case in which the operating point of the fan motor unit 20 is limited to the linear region T1 will be illustrated.

[0113] The air blowing system according to the second embodiment is configured by changing the control unit 10 of the air blowing system according to the first embodiment to a control unit 10A according to the second embodiment.

[0114] FIG. 13 is a block diagram showing an example of the configuration of a control unit 10A according to the second embodiment.

[0115] 13, the control unit 10A is modified from the control unit 10 according to the embodiment 1. The correspondence holding unit 14 is changed to a correspondence holding unit 14A.

[0116] The correspondence holding unit 14A holds a correspondence table indicating the correspondence between the air volume command S and the speed notification FG for each of the multiple types of fan motor units. The correspondence table is created in advance. In the second embodiment, the multiple types of fan motor units covered by the correspondence table held by the correspondence holding unit 14A have the same fan shape and case shape, but different numbers of poles of the motor.

[0117] A specific example of a method for creating the correspondence table held by the correspondence holding unit 14A will be described below with reference to the drawings. In the following, the multiple types of fan motor units will be described as two types of fan motor units, a fan motor unit B (hereinafter also referred to as "unit B") having a motor with 10 poles, and a fan motor unit C (hereinafter also referred to as "unit C") having a motor with 8 poles, as an example. However, the multiple types of fan motor units do not need to be limited to the two types of fan motor units B and C, as long as they have the same fan shape and case shape but different numbers of motor poles.

[0118] FIG. 14 shows the relationship between the motor rotation speed Sr [rpm] and the flow rate Q [m 3 1 is a schematic diagram showing the relationship between [0.15% / h] and [0.25% / h].

[0119] As described above, the operating points of unit B and unit C are in the linear region T1 (see FIG. 6). Therefore, as shown in FIG. 14, the relationship between the rotation speed Sr and the flow rate Q in unit B and unit C is linear. On the other hand, since unit B and unit C have the same fan shape and case shape, the flow rate Q is the same in unit B and unit C when the motor rotates at the same rotation speed Sr.

[0120] As a first step, when the maximum flow rate required in the blower system according to the second embodiment is Qmax, the motor rotation speed Sr for realizing the flow rate Qmax in the unit B is calculated. B and the motor speed Sr to realize the flow rate Qmax in unit C. C Since the fan shape and case shape of unit B and unit C are the same, as shown in FIG. B and Sr C is equal to

[0121] In the second stage, for unit B, when the duty of the airflow command S becomes 90%, the motor speed Sr becomes Sr B The relationship between the airflow command S and the rotation speed Sr is determined so that, for unit C, when the duty of the airflow command S is 90%, the motor rotation speed Sr is Sr C The relationship between the air volume command S and the rotation speed Sr is determined so as to satisfy the following equation.

[0122] FIG. 15 is a schematic diagram showing the relationship between the duty [%] of the airflow command S and the motor rotation speed Sr [rpm] in the unit B and the unit C determined in the second stage according to the second embodiment. B and Sr C 15, the relationship between the duty [%] of the airflow command S and the motor rotation speed Sr [rpm] is the same in unit B and unit C.

[0123] As described above, the relationship between the frequency of the speed notification FG, i.e., the frequency of the Hall signal H, and the rotation frequency of the motor is such that the frequency of the speed notification FG is the motor rotation frequency x the number of poles of the motor (here, 10) x 1 / 2. Using this relationship, in the third stage, the relationship between the duty [%] of the airflow command S and the frequency [Hz] of the speed notification FG in units B and C is calculated based on the relationship between the duty [%] of the airflow command S and the motor rotation speed Sr [rpm] in units B and C determined in the second stage.

[0124] FIG. 16 is a schematic diagram showing the relationship between the duty [%] of the airflow command S and the frequency [Hz] of the speed notification FG in unit B and unit C determined in the third stage according to embodiment 2. The relationship between the duty [%] of the airflow command S and the motor rotation speed Sr [rpm] in unit B and unit C is the same. However, the number of poles of the motor in unit B is different from the number of poles of the motor in unit C. Therefore, as shown in FIG. 16, the relationship between the duty [%] of the airflow command S and the frequency [Hz] of the speed notification FG in unit B and unit C is different from each other.

[0125] Correspondence holding unit 14A pre-stores a correspondence table indicating the relationship between the duty [%] of air volume command S and the frequency [Hz] of speed notification FG in unit B and unit C calculated in the third stage.

[0126] Fig. 17A is a schematic diagram showing a waveform of a first speed notification FG output from unit B in response to a first airflow command S when airflow command output unit 11 according to embodiment 2 outputs a first airflow command S to unit B. Fig. 17B is a schematic diagram showing a waveform of a first speed notification FG output from unit C in response to a first airflow command S when airflow command output unit 11 according to embodiment 2 outputs a first airflow command S to unit C.

[0127] As shown in FIGS. 17A and 17B, when the fan motor unit 20 is unit B and when the fan motor unit 20 is unit C, the frequency of the first speed notification signal FG differs from each other.

[0128] Therefore, based on the correspondence table stored in the correspondence storage unit 14A, when the relationship between the first airflow command S and the first speed notification FG corresponds to unit B, the identification unit 13 outputs a type identification signal for identifying unit B, and when the relationship between the first airflow command S and the first speed notification FG corresponds to unit C, the identification unit 13 outputs a type identification signal for identifying unit C.

[0129] The type identification signal output from the control unit 10A is output to, for example, an ECU as shown in Fig. 2. Specifically, the type identification signal is output to a determination unit (not shown) or the like provided in the ECU.

[0130] <Consideration> As described above, the air blowing system of embodiment 2 can identify the type of fan motor unit 20 based on the first air volume command S and the first speed notification FG, and output a type identification signal indicating the identified type, even if the multiple types of fan motor units covered by the correspondence table have the same fan shape and case shape but different numbers of motor poles.

[0131] Furthermore, as disclosed in embodiment 1, the ventilation system 1 can output a type identification signal for identifying the type of fan motor unit 20 based on the first airflow command S and the first speed notification FG when multiple types of fan motor units covered by the correspondence table differ in at least one of the fan shape and the case shape, but have the same number of motor poles.

[0132] Therefore, by applying the technology disclosed in embodiment 1 to the air blowing system of embodiment 2, it is clear that the air blowing system of embodiment 2 will be able to identify the type of fan motor unit 20 based on the first airflow command S and the first speed notification FG, and output a type identification signal indicating the identified type, even if the multiple types of fan motor units covered by the correspondence table differ from each other in at least one of the fan shape, case shape, and number of motor poles.

[0133] (Embodiment 3) The following describes the air blowing system according to embodiment 3. Here, for the air blowing system according to embodiment 3, components similar to those of the air blowing system 1 according to embodiment 1 have already been described, so they are denoted by the same reference numerals and detailed description thereof is omitted.

[0134] The air blowing system 1 according to the first embodiment and the air blowing system according to the second embodiment are configuration examples illustrating a case where the operating point of the fan motor unit 20 is limited to the linear region T1 (see FIG. 6). In contrast, the air blowing system according to the third embodiment is a configuration example illustrating a case where the operating point of the fan motor unit 20 is not limited to the linear region T1.

[0135] FIG. 18 is a graph showing the relationship between the static pressure P [Pa] and the flow rate Q [m 3 / h], the relationship between the rotation speed Sr [rpm] of the motor 21 and the flow rate Q [m 3 1 is a schematic diagram showing the relationship between the load current and the load current [V / h] and the operating points of the fan motor unit 20.

[0136] As shown in FIG. 18, in the third embodiment, the operating point of fan motor unit 20 straddles a linear region T1 and a non-linear region T2.

[0137] The air blowing system according to the third embodiment is configured by changing the control unit 10 of the air blowing system according to the first embodiment to a control unit 10B according to the third embodiment.

[0138] FIG. 19 is a block diagram showing an example of the configuration of a control unit 10B according to the third embodiment.

[0139] 19, the control unit 10B is configured by modifying the control unit 10 according to the embodiment 1. The correspondence holding unit 14 is modified to a correspondence holding unit 14B.

[0140] The correspondence relationship holding unit 14B holds a correspondence table indicating the correspondence relationship between the air volume command S and the speed notification FG for each of a plurality of types of fan motor units. The correspondence table is created in advance.

[0141] FIG. 20 is a schematic diagram showing the correspondence relationship between the duty [%] of the airflow command S and the frequency [Hz] of the speed notification FG for one type of fan motor unit 20, which is shown by the correspondence table stored in the correspondence holding unit 14B.

[0142] 20, when the operating point of fan motor unit 20 is in linear region T1, the relationship between airflow command S and speed notification FG is linear. On the other hand, when the operating point of fan motor unit 20 is in nonlinear region T2, the relationship between airflow command S and speed notification FG is not linear. This is because the load on motor 21 is relatively high in nonlinear region T2, and therefore motor 21 cannot rotate at the rotation speed corresponding to the three-phase AC power supplied from drive circuit 28.

[0143] In this way, when the operating point of the fan motor unit 20 is not limited to the linear region T1, the relationship between the airflow command S and the speed notification FG is not necessarily linear. However, the relationship between the airflow command S and the speed notification FG can be created, for example, by performing a test using an actual device or by a simulation using a simulator. The correspondence holding unit 14B stores the correspondence table created in advance in this way.

[0144] The type identification signal output from the control unit 10B is output to, for example, an ECU as shown in Fig. 2. Specifically, the type identification signal is output to a determination unit (not shown) or the like provided in the ECU.

[0145] <Consideration> As described above, in the air blowing system according to the third embodiment, the correspondence holding unit 14B holds a correspondence table for cases in which the operating point of the fan motor unit 20 is not limited to the linear region T1. Therefore, according to the air blowing system according to the third embodiment, even if the operating point of the fan motor unit 20 is not limited to the linear region T1, it is possible to identify the type of the fan motor unit 20 based on the first air volume command S and the first speed notification FG, and to output a type identification signal indicating the identified type.

[0146] (Embodiment 4) The following describes the air blowing system according to embodiment 4. Here, for the air blowing system according to embodiment 4, components similar to those of the air blowing system according to embodiment 3 have already been described, so they are given the same reference numerals and detailed descriptions thereof are omitted.

[0147] The air blowing system according to embodiment 4 has the same functions as those of the air blowing system according to embodiment 3. The air blowing system according to embodiment 4 further has a function of outputting an abnormality detection signal indicating that an abnormality in fan motor unit 20 has been detected when the relationship between first air volume command S and first speed notification FG satisfies a predetermined relationship.

[0148] The air blowing system according to the fourth embodiment is configured by changing the control unit 10B of the air blowing system according to the third embodiment to a control unit 10C according to the fourth embodiment.

[0149] FIG. 21 is a block diagram showing an example of a configuration of a control unit 10C according to the fourth embodiment.

[0150] 21, the control unit 10C is configured by modifying the control unit 10B according to the embodiment 3. The determination unit 13 is modified to a determination unit 13C.

[0151] The determination unit 13C has the same functions as those of the determination unit 13 according to the embodiment 3. The determination unit 13C further has the following functions.

[0152] In other words, when the correspondence between the first air volume command S and the first speed notification FG based on the correspondence table stored in the correspondence storage unit 14B does not correspond to any of the multiple types of fan motor units covered by the correspondence table, the identification unit 13C outputs an abnormality detection signal indicating that an abnormality related to the fan motor unit 20 has been detected.

[0153] As exemplified below, in the air blowing system according to the fourth embodiment, among the abnormalities related to the fan motor unit 20, there is an abnormality of a type in which the relationship between the air volume command S and the speed notification FG varies. Therefore, when the correspondence relationship between the first air volume command S and the first speed notification FG does not correspond to any of the multiple types of fan motor units covered by the correspondence table, it is considered that an abnormality related to the fan motor unit 20 of a type in which the relationship between the air volume command S and the speed notification FG varies has occurred. Therefore, the identification unit 13C outputs an abnormality detection signal when the correspondence relationship between the first air volume command S and the first speed notification FG does not correspond to any of the multiple types of fan motor units covered by the correspondence table.

[0154] FIG. 22 is a schematic diagram illustrating how the relationship between airflow command S and speed notification FG changes due to an abnormality in fan motor unit 20 according to the fourth embodiment.

[0155] As shown in Fig. 22, for example, when an abnormality occurs such as a separator between cells in the battery pack 30 becoming detached, the wind resistance of the air blown by the fan motor unit 20 decreases. This causes the operating point of the fan motor unit 20 to move toward the nonlinear region T2. ​​This causes the relationship between the air volume command S and the speed notification FG to fluctuate. More specifically, the relationship between the air volume command S and the speed notification FG fluctuates so that the range in which the relationship is linear becomes narrower.

[0156] For example, if an abnormality occurs in which the duct of the fan motor unit 20 becomes detached from the battery pack 30, the wind resistance of the air blown by the fan motor unit 20 decreases. This causes the operating point of the fan motor unit 20 to move toward the nonlinear region T2. ​​This causes the relationship between the air volume command S and the speed notification FG to fluctuate. More specifically, the relationship between the air volume command S and the speed notification FG fluctuates so that the range in which the relationship is linear becomes narrower.

[0157] For example, if an abnormality occurs in which something is stuck between the cells in the battery pack 30, the wind resistance of the air blown by the fan motor unit 20 increases. This causes the operating point of the fan motor unit 20 to move toward the linear region T1. This causes the relationship between the air volume command S and the speed notification FG to fluctuate. More specifically, the relationship between the air volume command S and the speed notification FG fluctuates so that the range in which the relationship is linear becomes wider.

[0158] For example, if an abnormality occurs such as clogging of the duct of the fan motor unit 20, the wind resistance of the air blown by the fan motor unit 20 increases. This causes the operating point of the fan motor unit 20 to move toward the linear region T1. This causes the relationship between the air volume command S and the speed notification FG to fluctuate. More specifically, the relationship between the air volume command S and the speed notification FG fluctuates so that the range in which the relationship is linear becomes wider.

[0159] Hereinafter, the operation of the air blowing system according to the fourth embodiment having the above configuration will be described.

[0160] The air blowing system according to the fourth embodiment executes a second identification process that outputs a type identification signal or an abnormality detection signal.

[0161] FIG. 23 is a flowchart of the second identification process.

[0162] 23, the processes of steps S200 to S240 are respectively the same as the processes of steps S100 to S140 in the first identification process according to embodiment 1, except that identification unit 13 is replaced with identification unit 13C. Therefore, since the processes of steps S200 to S240 have already been described, detailed description thereof will be omitted here, and the description will focus on the processes of steps S260 to S280.

[0163] When the processing of step S240 is completed, the identification unit 13C determines, based on the correspondence table stored in the correspondence storage unit 14B, whether the correspondence between the first airflow command S and the first speed notification FG corresponds to any of the multiple types of fan motor units covered by the correspondence table (step S260).

[0164] In the processing of step S260, if the correspondence between the first airflow command S and the first speed notification FG corresponds to any of the multiple types of fan motor units covered by the correspondence table (step S260: Yes), the identification unit 13C outputs a type identification signal to identify the corresponding type of fan motor unit (step S270).

[0165] In the processing of step S260, if the correspondence between the first airflow command S and the first speed notification FG does not correspond to any of the multiple types of fan motor units covered by the correspondence table (step S260: No), the identification unit 13C outputs an abnormality detection signal indicating that an abnormality related to the fan motor unit 20 has been detected (step S280).

[0166] The type identification signal or the abnormality detection signal output from the control unit 10C is output to an ECU, for example, as shown in Fig. 2. Specifically, the type identification signal or the abnormality detection signal is output to a determination unit (not shown) or the like provided in the ECU.

[0167] When the process of step S270 is completed and when the process of step S280 is completed, the ventilation system according to the fourth embodiment ends the second identification process.

[0168] <Consideration> As described above, in the air blowing system according to the fourth embodiment, when the correspondence between the first air volume command S and the first speed notification FG does not correspond to any of the multiple types of fan motor units covered by the correspondence table, an abnormality detection signal is output. This allows an abnormality in fan motor unit 20 to be quickly discovered.

[0169] (Other embodiments) As described above, the first to fourth embodiments have been described as examples of the technology disclosed in this application. However, the technology according to this disclosure is not limited to these embodiments. As long as it does not deviate from the gist of this disclosure, various modifications conceived by a person skilled in the art to the present embodiments, or forms constructed by combining components in different embodiments, may also be included within the scope of the technology disclosed in this application.

[0170] (1) In the first to fourth embodiments, the correspondence relationship holding unit 14 to the correspondence relationship holding unit 14B have been described as holding a correspondence table indicating the correspondence between the airflow command S and the speed notification FG for each of the multiple types of fan motor units. However, the correspondence relationship holding unit 14 to the correspondence relationship holding unit 14B are not necessarily limited to a configuration in which a correspondence table is held as the correspondence relationship information, as long as they hold correspondence relationship information indicating the correspondence between the airflow command S and the speed notification FG for each of the multiple types of fan motor units. For example, the correspondence relationship holding unit 14 may be configured to hold a function indicating the correspondence between the airflow command S and the speed notification FG for each of the multiple types of fan motor units as the correspondence relationship information.

[0171] (2) One aspect of the present disclosure may be not only such an air blowing system, but also a method having steps corresponding to the characteristic processes performed by the air blowing system. Also, one aspect of the present disclosure may be a computer program that causes a computer to execute each step included in the method. Also, one aspect of the present disclosure may be a computer-readable non-transitory recording medium having such a computer program recorded thereon. [Industrial Applicability]

[0172] The present disclosure can be widely used in ventilation systems that blow air. [Explanation of symbols]

[0173] 1. Air Blower System 10, 10A, 10B, 10C Control section 11 Air volume command output section 12 Speed ​​notification acquisition unit 13, 13C specific part 14, 14A, 14B Correspondence retention section 15 Characteristic retention part 20 Fan motor unit 21 Motor 22 Fan 23 cases 25 Hall Sensor 26 Microcomputer 28 Drive circuit 30 Battery Pack 100 ECU 110 Electric Vehicles

Claims

1. a fan motor unit that has a motor, a fan that rotates by rotation of the motor, and a case that covers at least a part of the fan, and that blows air to the outside; and a control unit that controls the fan motor unit, the control unit outputs an air volume command to the fan motor unit to control the volume of air blown by the fan motor unit; The fan motor unit outputs a speed notification indicating a rotation state of the motor to the control unit, a first step of outputting a first air volume command to the fan motor unit by the control unit when performing control for causing the fan motor unit to operate normally; a second step of the control unit acquiring a first speed notification output from the fan motor unit in response to the output of the first air volume command; a third step of the control unit identifying a type of the fan motor unit based on the first air volume command and the first speed notification, and outputting a type identification signal indicating the identified type, a correspondence table indicating a relationship between the duty of the air volume command and the speed notification is stored in advance; the control unit outputs the type identification signal based on the correspondence table. Specific method.

2. The control unit further holds correspondence information indicating a correspondence between the air volume command and the speed notification for each of a plurality of types of fan motor units, The method of claim 1, wherein in the third step, when the correspondence between the first air volume command and the first speed notification corresponds to one type of fan motor unit among the multiple types of fan motor units based on the correspondence information, the control unit outputs the type identification signal for identifying the one type of fan motor unit.

3. The third step further includes, when the control unit determines based on the correspondence information that the correspondence between the first air volume command and the first speed notification does not correspond to any of the plurality of types of fan motor units, indicating that an abnormality related to the fan motor unit has been detected. The method according to claim 2 , further comprising a fourth step of outputting an anomaly detection signal.

4. The rotation of the motor is controlled by PWM (Pulse Width Modulation) control, the air volume command is a PWM duty signal for controlling the rotation of the motor by PWM control, 4. The method according to claim 1, wherein the speed notification is a pulse signal having a frequency n / 2 times the rotational frequency of the motor, where n is an integer equal to or greater than 2, and the number of poles of the motor is n.

5. 5. The method according to claim 4, wherein in the first step, the control unit outputs the first airflow command having a duty in a range in which a relationship between the duty of the PWM duty signal and the frequency of the pulse signal is linear.

6. a fan motor unit that has a motor, a fan that rotates by rotation of the motor, and a case that covers at least a part of the fan, and that blows air to the outside; and a control unit that controls the fan motor unit, the control unit outputs an air volume command to the fan motor unit to control the volume of air blown by the fan motor unit; the fan motor unit outputs a speed notification indicating a rotation state of the motor to the control unit; when the control unit outputs a first air volume command to the fan motor unit when controlling the fan motor unit to operate normally, and when a first speed notification is output from the fan motor unit in response to the first air volume command, the control unit identifies a type of the fan motor unit based on the first air volume command and the first speed notification, and outputs a type identification signal indicating the identified type; a correspondence table indicating a relationship between the duty of the air volume command and the speed notification is stored in advance; the control unit outputs the type identification signal based on the correspondence table. Blowing system.

7. The control unit further holds correspondence information indicating the correspondence between the air volume command and the speed notification for each of a plurality of types of fan motor units, and when the correspondence between the first air volume command and the first speed notification corresponds to one type of fan motor unit among the plurality of types of fan motor units based on the correspondence information, outputs the type identification signal for identifying the one type of fan motor unit.

8. The air blowing system of claim 7, wherein the control unit further outputs an abnormality detection signal indicating that an abnormality related to the fan motor unit has been detected when the correspondence between the first airflow command and the first speed notification based on the correspondence information does not apply to any of the multiple types of fan motor units.

Images