JP2001238491A - Motor operation control circuit and blower - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a motor operation control circuit at a low cost, which divides a plurality of motors into groups, performs operation control of the groups by different control systems, and can readily exchange the control systems with respect to the groups. SOLUTION: This motor operation control circuit makes a plurality of control switches 12, 13, 14 and a control part 16 provided with a relay 15 operate motors 10, 11 by two different control systems with respect to the motor 10 belong to one group and the motor 11 belonging to the other group. The respective motors 10, 11 have circuit constitutions of the same number of notches. Two kinds of control outputs from the control part 16 by the control switches 12, 13, 14 are constituted to be exchangeable with respect to each of the motors 10, 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ventilator for exchanging indoor air by supplying and exhausting air to ventilate, a blower having a circulation function for circulating indoor air to the ventilator, and operating these motors. The present invention relates to a motor operation control circuit for controlling.

[0002]

2. Description of the Related Art A wide variety of air blowers have been developed for ventilation by exchanging indoor air by supplying and exhausting air. Some of them include a heat exchanger and perform ventilation by supply and exhaust while exchanging heat between the supply and exhaust streams. In addition, a blower has been developed in which an air purifier for purifying indoor air by circulating indoor air separately from the ventilation system is incorporated. In many of such blowers, the operation of the blower has conventionally been controlled by a motor operation control circuit as shown in FIGS. 7 and 8.

That is, the motor 50 of the exhaust blower having a notch for adjusting the speed and the motor 51 of the air blower having no notch for adjusting the speed are provided with first and second control switches 52 and 53 and a relay. The operation of the motor 50 belonging to the exhaust gas and the motor 51 belonging to the air supply are controlled by two different control methods by the control unit 55 provided with 54. The first control switch 52 is for starting and stopping the two motors 50, 51, and the second control switch 53 is for switching the notch of the motor 50 belonging to the exhaust, and via a relay contact 56. It is connected to a motor 50 belonging to the exhaust. When the first control switch 52 is operated, a voltage is applied to the two motors 50 and 51, and the exhaust blower and the air supply blower simultaneously start operating. Here, when the second control switch 53 is operated, a voltage is applied to the relay coil 57 of the relay 54, the relay contact 56 is switched, and the notch of the motor 50 of the exhaust blower is switched. Further, when the first control switch 52 is opened, both the exhaust blower and the air supply blower are stopped. FIG.
The motor operation control circuit of the control unit 55 and the motor 50,
8 are connected by a swaging terminal 58 with an insulating cover, and in FIG.

[0004] In addition, FIG.
In the apparatus disclosed in Japanese Patent Publication No. 4 (JP-A-4), motors 50 and 51 of an exhaust blower and an air supply blower are provided with notches for adjusting speed, and a motor 62 for operating a damper plate is provided. Control is simultaneous start / stop by the first control switch 52, simultaneous weak / strong switching by the second control switch 53,
The third control switch 61 starts and stops the motor 62. By providing a changeover switch 60 to this, the notches of the motors 50 and 51 can be individually changed. When the second control switch 53 is used to switch to the high level, the switch 60 can be used to switch the high level to the very high level.

[0005] The motor operation control circuit described above is also applied to a ventilator incorporating an air purifier. For example, the operation of a motor belonging to ventilation can be controlled by a variable speed control method, and the operation of a circulation motor belonging to air purification can be controlled by a start / stop control method.

[0006]

Controlling a plurality of motors individually is not so difficult according to electronic control technology using a microcomputer.
It can also be performed by providing a control switch for starting and stopping and a control switch for speed switching in each motor, but the former has a problem that causes a significant increase in cost,
The latter has a problem that the number of control switches increases. The switch box of JIS C8336, which is commonly used, can contain only three standard tumbler switches in a row. For example, two motors are provided with individual start / stop control switches and individual speed switching control switches. In this case, four tumbler switches are required and two rows are required, which is disadvantageous in terms of design and space saving of the switch occupation area. Further, in Japanese Unexamined Utility Model Publication No. 61-192234, although the notch of the motor can be changed in a state where the air blower and the exhaust blower are independent from each other, a control method using a control switch is used. The air blower and the exhaust blower cannot be interchanged (see FIG. 10).

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems. An object of the present invention is to group a plurality of motors and control the operation of the groups by different control methods. The purpose is to obtain a low-cost motor operation control circuit that can easily change the control method in order to prevent an increase in the switch occupation area of the operation circuit, and to group a plurality of blowers. Another object of the present invention is to provide a low-cost blower that can control the operation of a group using a different control method and can easily change the control method for the group.

[0008]

According to a first aspect of the present invention, there is provided a motor control system comprising two or more motors which are controlled by a plurality of control switches and a control unit having switching means. Regarding the motor operation control circuit that operates each motor with two different control methods different from the motor belonging to the other, each motor has a circuit configuration with the same number of notches, and each control output from the control unit by the control switch is different. A means for making the motor interchangeable is employed.

In order to achieve the above object, a second aspect of the present invention employs a means for replacing two types of control outputs in the means according to the first aspect with replaceable connection means having the same configuration. .

According to a third aspect of the present invention, there is provided a control unit of the first aspect, wherein the control unit includes a circuit connected to one of the motors via the switching unit and the other connected to the other motor without the switching unit. , A circuit that connects to a motor that belongs to the other motor via the switching means, and a switch that switches to a circuit that connects to a motor that belongs to one of the motors without passing through the switching means.

According to a fourth aspect of the present invention, there is provided a control unit according to the third aspect, wherein the control unit is provided with a second switching means which operates by switching a switch, and the switching means switches the switching means. The circuit that leads to the motor belonging to one of the motors is switched to the circuit that leads to the motor that belongs to the other without passing through the switching means, and the circuit that leads to the motor that belongs to the other via the switching means passes through the switching means. A means for switching to a circuit leading to the motor belonging to the other without using the circuit is adopted.

In order to achieve the above object, an invention according to claim 5 is characterized in that two or more blowers are divided into one blower belonging to one and another blower belonging to the other by a control unit having a plurality of control switches and switching means. Regarding a blower with an operation control circuit that operates each blower with two different control methods,
The motor of each blower has a circuit configuration with the same number of notches, and a means is employed in which two types of control outputs from the control unit by the control switches are interchangeable for each motor of each blower.

According to a sixth aspect of the present invention, there is provided a means for changing the control output in the means according to the fifth aspect, wherein the two kinds of control outputs can be exchanged by the replaceable connection means having the same configuration. adopt.

According to a seventh aspect of the present invention, there is provided a control device according to the fifth aspect, wherein the control unit includes a circuit that communicates with the blower belonging to one of the units via the switching unit and the other that does not pass through the switching unit. And a circuit leading to the fan belonging to the other via the switching means,
Means having a switch for switching to a circuit leading to one of the blowers without passing through the switching means is employed.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 The present embodiment shown in FIGS. 1 to 4 has a ventilation function of exhausting indoor air to the outside of a room, exchanging heat between supply and exhaust flows while supplying the outdoor air to the room, and ventilation of the room. The present invention relates to an air purification ventilator as a blower having a purification processing function of purifying indoor air by circulating air. This air purifying and ventilating device is provided with a ventilation unit including a laminated hexahedral heat exchanger 2, an air supply blower 3, and an exhaust blower 4 in a main body box 1 having an open rectangular parallelepiped box structure. 5 and a purifying section 7 comprising a circulation blower 6 and a deodorizing filter are arranged adjacent to each other (see FIG. 1).

The ventilation section 5 and the purification section 7 are separated from each other by a partition. An exhaust passage that passes through an exhaust flow, which is a primary air flow, that is continuous through one working fluid passage of the heat exchanger 2 inside the main body box 1 that serves as the ventilation unit 5 and the other working fluid passage of the heat exchanger 2 , And an air supply passage through which the air supply flow as the secondary air flow passes are formed independently of each other over the entire path.

The heat exchanger 2 is arranged such that the ridges are directed sideward and forward and rearward at substantially the center of the main body 1, and the two closed edges face the rear and front open portions of the main body 1, respectively. The working fluid passage is installed so as to be able to be vertically inserted and removed with the working fluid passage oriented substantially horizontally. The outlet end and the inlet end of the working fluid passage communicating with the air supply passage of the heat exchanger 2 are respectively opened on two opposite surfaces, and the outlet end and the inlet end of the other working fluid passage communicating with the exhaust passage are It is open on each of the other two opposite surfaces. Except for the two small edges of the heat exchanger 2, the four ridges serving as boundaries of the other four sides are constituted by holding frames that hold the heat exchanger 2, and each holding frame has an angle-shaped filter mounting rail. The filter is provided so as to be opposed to the filter, so that the filter can be detached by inserting and removing the heat exchanger 2 from the edge side.

The exhaust passage has an indoor suction port formed on the rear side of the open portion on the front side of the main body box 1 as an inlet end, communicates with the front side of the main body box 1 and has one end of the heat exchanger 2. An exhaust blower 4 is assembled between the indoor suction port and the heat exchanger 2 in a series of ventilation paths having an outdoor outlet 9 provided on the rear surface of the main body box 1 via a working fluid passage and having an outlet end. ing. The air supply passage is provided with an outdoor suction port 8 provided on the rear surface of the main body box 1.
Is an inlet end, and a series of ventilation with an indoor air outlet opened in front of the main body box 1 through the other working fluid passage of the heat exchanger 2 through the rear side of the main body box 1 as an outlet end. The air supply blower 3 is mounted between the outdoor suction port 8 and the heat exchanger 2 on the road. The motor 10 of the exhaust blower 4 and the motor 10 of the air supply blower 3 are common, and are mounted on a partition partitioning the air supply passage and the exhaust passage so that both motor shafts are substantially horizontal in the front-rear direction (width direction). Have been. Ducts (not shown) are connected to the outdoor suction port 8 and the outdoor blowout port 9, respectively.
Outside (mostly outside).

On the other hand, in the main body box 1 serving as the purifying section 7,
The indoor suction port formed side by side adjacent to the indoor suction port of the ventilation unit 5 is set as an inlet end, and is configured side by side from one side of the main body box 1 adjacent to the indoor outlet of the ventilation unit 5. A circulation air passage having an indoor outlet as an exit end is formed, and a circulation blower 6 is incorporated in a portion of the main body box 1 on one side. The circulation blower 6 includes a double-suction type multi-blade fan, and the motor axis of the motor 11 is arranged in the lateral direction so as to be substantially perpendicular to the motor axis of the motor 10 of the ventilation unit 5. A deodorizing filter is detachably mounted on the indoor suction port side of the opening of the main body box 1 of the purification unit 7. The deodorizing filter has a configuration in which activated carbon is attached to paper serving as a base material, and a filter material having a honeycomb structure is held by a holding frame, and mainly adsorbs ammonia, methyl mercaptan, hydrogen sulfide, and the like. The filter medium has been subjected to a copper ionization immersion treatment in order to extend the life.

This air purification ventilator has an air supply blower 3
An operation control circuit as shown in FIGS. 2 and 3 for controlling the operation of the exhaust blower 4 and the circulation blower 6 is mounted. The operation control circuit controls the operation of the motor 10 belonging to ventilation and the motor 11 belonging to circulation.
And a control unit 16 having a relay 15 as a switching means. The motor 10 belonging to the ventilation and the motor 11 belonging to the circulation are different from each other. Operation is controlled by the control method. Both the motor 10 belonging to the ventilation and the motor 11 belonging to the circulation have the same notch number (in this embodiment, two notches of strong / weak), and the control unit 16 has the same shape and replaceable connection. Connector 17 as a means
, The connection relation can be exchanged.

The connector 1 on the motor 10 side belonging to the ventilation
7 and the connector 17 on the side of the motor 11 belonging to the circulation are arranged in a close position, and the connection relation can be easily replaced by replacement (see FIGS. 2 and 3). Control unit 1
6 is a relay coil 18 and relay contacts 19, 20, 21
, And is connected to the first to third control switches 12, 13, and 14 via the terminal block 22. The first control switch 12 is a switch for starting and stopping the motor 10 of the air supply fan 3 and the exhaust fan 4 belonging to ventilation, and the second control switch 13 is a switch for switching a notch of the motor 10 belonging to ventilation. The third control switch 14 is a switch for starting and stopping the motor 11 of the circulation blower 6 belonging to the circulation. First to third
The control switches 12, 13, and 14 are assembled in a line in a switch box 23 of JIS C8336, which is often used, and are arranged at appropriate places in a room for easy operation.

This air purifying and ventilating apparatus is suspended and fixed in a space such as the space above the ceiling with anchor bolts or the like so that the front of the main body 1 is on the ceiling side, and the front of the main body 1 is along the ceiling. A makeup grill is attached to the form. Thus, the ventilation function involving heat exchange and the purification processing function for removing the odor can be performed individually or in parallel with respect to the indoor space.

When the first control switch 12 is operated,
The exhaust blower 4 and the supply blower 3 operate at a strong notch,
An exhaust flow and a supply air flow are formed, and heat exchange ventilation is performed by the ventilation unit 5. When the second control switch 13 is actuated, a voltage is applied to the relay coil 18 and the relay contacts 20 to 21
And the exhaust blower 4 and the air supply blower 3 are operated at a weak notch, and heat exchange ventilation with a low air flow is performed. When the third control switch 14 is operated, the power is supplied to the motor 11 and the purification unit 7 operates. The motor 11 operates at a strong notch, and the circulating blower 6 forms a circulating airflow in the room. The indoor air is sucked from the suction opening of the makeup grill, passes through the deodorizing filter, passes through the indoor blower through the circulation blower 6, passes through the indoor outlet, and is again blown into the room from the outlet opening of the makeup grill.

That is, the operation of the motor 10 belonging to the ventilation is controlled by two control methods, namely, the control method of starting and stopping and the switching of the strength, and the operation of the motor 11 belonging to the circulation is controlled by two control methods. If a situation arises in which it is desired to control the operation of the ventilation unit 5 by a start / stop control method and the purifying unit 7 by a start / stop and strength switching control method, the connector 17 of the motor 10 belonging to the ventilation and the motor 1 belonging to the circulation.
If the one connector 17 is replaced with another, the operation can be easily performed by operating the first to third control switches 12, 13, and 14, which are hand switches. When the connector 17 is replaced, the motor 11 of the circulation blower 6 is started and stopped by the first control switch 12, and the notch is switched by the second control switch 13. The third switch 14 for the motor 10 belonging to ventilation
As a result, the operation control is performed by the start / stop control method with the strong notch fixed (see FIG. 4). At this time, if the function display of the first to third control switches 12, 13, 14 in the switch box 23 can be changed at any time, it is easy to use.

In this embodiment, the motor 1 belonging to the ventilation
0 and the motor 11 belonging to the circulation, it is possible to exchange the control method. However, in the air supply / exhaust ventilation device in which the air supply blower 3 and the exhaust blower 4 are constituted by separate motors, It is also possible to switch the control method between the motor belonging to the motor and the motor belonging to the exhaust. In this case, the ventilation operation in which the supply air flow is larger than the exhaust air flow or the ventilation operation in which the supply air flow is smaller than the exhaust air flow can be easily performed at hand by simply replacing the connector 17. Further, the switching of the control method between the grouped motor groups or the blower groups can be performed in a similar manner. In this case, even if the group of motors or the group of blowers are controlled from different places and it is desired to change the place of control, the control place can be easily changed without changing the wiring. Also, the present invention can be applied to a blower that performs simultaneous start / stop and the notch switching operation of only one of the blowers as in the conventional example shown in FIGS. 7 and 8.

Embodiment 2 FIG. In the present embodiment shown in FIG. 5, the switching of the control method for the operation control circuit of the blower shown in Embodiment 1 is enabled by switching without using the connector 17, and the configuration other than the configuration related to this is possible. This is the same as that of the first embodiment. Therefore, the same portions as those of the first embodiment are denoted by the same reference numerals as those of the first embodiment, and the description thereof will be omitted.

The operation control circuit of the air purifying and ventilating apparatus according to the present embodiment includes a control unit 16 shown in the first embodiment, a circuit that leads to the motor 10 belonging to ventilation via the relay contact 20 of the relay 15, A circuit leading to the motor 11 belonging to the circulation without passing through the relay 15 is a circuit connecting to the motor 11 belonging to the circulation via the relay contact 26 of the relay 15 and a motor 1 belonging to the ventilation without passing through the relay 15.
A three-way switch 27 for switching to a circuit leading to zero is provided. The contact 29 of the three-way switch 27 has a path leading to the motor 10 belonging to ventilation through the relay contact 19,
A path leading to the motor 11 belonging to the circulation without passing through the relay 15 is connected. The contact 30 is connected to a path leading to the motor 10 belonging to the ventilation through the relay contact 24 and the relay 15.
Are connected to a path leading to the motor 11 belonging to the circulation without passing through. In addition, the first and second control switches 12,
Four-way switch 31 between 14 and both motors 10, 11
Is provided. Although the contacts 32 and 34 and the contacts 33 and 35 of the four-way switch 31 are connected,
By switching the road switch 31, the contact 32 and the contact 35,
The contacts 33 and 34 are connected.

When the contact 33 and the contact 35 of the four-way switch 31 are connected, the motor 10 belonging to ventilation can be started and stopped by the first control switch 12, and the contact 32
When the contact 34 is connected to the third control switch 14, the third control switch 14 can start and stop the motor 11 belonging to the circulation. When the contact 29 of the three-way switch 27 is connected, the motor 10 belonging to the ventilation is controlled by the second control switch 13.
Can be switched. When the three-way switch 27 is switched from the contact point 29 to the contact point 30, and the four-way switch 31 is switched so that the contact point 32 and the contact point 35 are connected and the contact point 33 and the contact point 34 are connected, the first control switch 12 belongs to the circulation. The motor 11 can be started and stopped, and the notch of the motor 11 belonging to the circulation can be switched by the second control switch 13. The third control switch 14 allows the motor 10 belonging to ventilation to start and stop.

The three-way switch 27 is moved from the contact 29 to the contact 30
When the four-way switch 31 is set in a state where the contacts 32 and 34 and the contacts 33 and 35 are connected, the first control switch 12 starts and stops the motor 10 belonging to ventilation, and the second control switch 13 enables switching of the notch of the motor 11 belonging to the circulation, and the third control switch 14 enables starting and stopping of the motor 11 belonging to the circulation. As described above, according to the second embodiment, the control can be switched as shown in the first embodiment. Other functions are the same as those of the first embodiment.

Embodiment 3 The present embodiment shown in FIG. 6 is different from the control unit 6 of the operation control circuit shown in the second embodiment.
And the second relay 36 is provided, and the control method is switched by the three-way switch 27, the four-way switch 31, and the second relay 36. The basic configuration is the same as that of the second embodiment. It is. Therefore, the same portions as those of the second embodiment are denoted by the same reference numerals as those of the second embodiment, and description thereof will be omitted.

The control unit 16 of the present embodiment includes a second relay 36 between the contact 30 of the three-way switch 27 and the contact 35 of the four-way switch 31 of the control unit 16 shown in the second embodiment.
The relay contact 37 is connected to the power supply, the relay contact 40 is connected to the motor 11 belonging to the circulation via the relay 15, and the relay contact 39 is connected without the relay 15. If the contact 28 and the contact 29 of the three-way switch 27 are connected, the notch of the motor 10 belonging to the ventilation can be switched between the relay contact 20 and the relay contact 21 by the second control switch 13, but belongs to the circulation. Motor 11 notch is relay 15
The connection is made without passing through the vehicle, so the notch is fixed. When the contact 28 and the contact 30 of the three-way switch 27 are connected, the notch of the motor 10 belonging to the ventilation is connected without passing through the relay 15, so that the notch is fixed, and the relay contact 39 of the second relay 36 is set to the relay contact. 4
Since it is switched to 0, the notch of the motor 11 belonging to the circulation can be switched by switching the relay contact 26 to the relay contact 25 by the second control switch 13. Other functions are the same as those of the second embodiment.

[0032]

According to the first aspect of the present invention, a plurality of motors are grouped, and the operation of the groups is controlled by different control methods, and the control method can be easily replaced for each group at a low cost. An operation control circuit for a motor that occupies a small area can be obtained.

According to the second aspect of the present invention, a plurality of motors are grouped, the operation of the groups is controlled by different control methods, and the switch occupation area can be reduced at a low cost so that the control methods can be easily replaced for the groups. A motor operation control circuit with less motors can be obtained.

According to the third aspect of the present invention, a plurality of motors are grouped, the operation of the groups is controlled by different control methods, and the switch occupation area can be reduced at a low cost so that the control methods can be easily replaced for the groups. A motor operation control circuit with less motors can be obtained.

According to the fourth aspect of the present invention, a plurality of motors are grouped, the operation of the groups is controlled by different control methods, and the switch occupation area can be reduced at a low cost so that the control methods can be easily replaced for the groups. A motor operation control circuit with less motors can be obtained.

According to the fifth aspect of the present invention, a plurality of blowers are grouped, the operation of the groups is controlled by different control systems, and the control system can be easily switched for the blowers of the group at a low cost. A blower with a small occupation area can be obtained.

According to the sixth aspect of the present invention, a plurality of blowers are grouped, the operation of the groups is controlled by different control systems, and the control system can be easily replaced for the blowers of the group at a low cost. A blower with a small occupation area can be obtained.

According to the seventh aspect of the present invention, a plurality of blowers are grouped, and the operation of the groups is controlled by different control systems, and the control system can be easily replaced for the group of blowers at a low cost. A blower with a small occupation area can be obtained.

[Brief description of the drawings]

FIG. 1 is a front view illustrating a configuration of an air purification and ventilation device according to a first embodiment.

FIG. 2 is a circuit configuration diagram of an operation control circuit according to the first embodiment.

FIG. 3 is a circuit configuration diagram in which a connector of the operation control circuit according to the first embodiment is switched.

FIG. 4 is an explanatory diagram showing a control system switching function by an operation control circuit according to the first embodiment;

FIG. 5 is a circuit configuration diagram of an operation control circuit according to a second embodiment.

FIG. 6 is a circuit configuration diagram of an operation control circuit according to a third embodiment.

FIG. 7 is a circuit configuration diagram of a conventional operation control circuit.

FIG. 8 is a circuit configuration diagram of another conventional operation control circuit.

FIG. 9 is a circuit configuration diagram of another conventional operation control circuit.

FIG. 10 is an explanatory diagram showing a notch switching function by a conventional operation control circuit.

[Explanation of symbols]

3 air blower, 4 exhaust blower, 6 circulation blower, 10 motors, 11 motors, 12
A first control switch, 13 a second control switch,
14 third control switch, 15 relay, 16
Control unit, 17 connectors, 27 three-way switch,
31 Four-way switch, 36 Second relay.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Katsuhiko Waki, 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Mitsui Electric Co., Ltd. (72) Takahiko Nishida 2-3-2, Marunouchi, Chiyoda-ku, Tokyo F term in Mitsubishi Electric Corporation (reference) 3L060 AA05 DD02 EE45 3L061 BB04 5H572 AA10 BB03 DD03 EE05 GG07 HA04 HA05 HB02 HC01 JJ03 KK05

Claims (7)

[Claims] 1. A motor having two or more motors operated by a plurality of control switches and a control unit provided with a switching means so that each of the motors is operated in two different control modes for a motor belonging to one motor and a motor belonging to the other motor. A motor operation control circuit, wherein each motor has a circuit configuration with the same number of notches, and two control outputs from a control unit by the control switch are interchangeable for each motor. 2. The motor operation control circuit according to claim 1, wherein two kinds of control outputs can be exchanged by interchangeable connection means having the same configuration. 3. The motor operation control circuit according to claim 1, wherein the control unit is connected to a motor belonging to one of the motors via a switching unit, and is connected to a motor belonging to the other without passing through the switching unit. A motor operation control circuit including a circuit, a switch for switching to a circuit that leads to the motor belonging to the other via the switching means, and a circuit that leads to the motor belonging to one without passing through the switching means. 4. The motor operation control circuit according to claim 3, wherein the control unit includes a second operation unit that operates by switching a switch.
A switching means, and a circuit that leads to one of the motors via the switching means by switching the switch,
The circuit connected to the motor belonging to one side is switched without passing through the switching means, and the circuit connected to the motor belonging to the other via the switching means is switched to a circuit connected to the motor belonging to the other without passing through the switching means. Motor operation control circuit that can be replaced. 5. Each of the two or more blowers is operated by a plurality of control switches and a control unit having a switching means so that the blowers belonging to one and the other belong to two different control systems. A blower provided with an operation control circuit for causing the motors of the respective blowers to have the same number of notches in a circuit configuration, and outputting two types of control outputs from a control unit by the control switches to the respective motors of the respective blowers. A blower that can be replaced. 6. The blower according to claim 5, wherein the two kinds of control outputs can be exchanged by replaceable connection means having the same configuration. 7. The blower according to claim 5, wherein the control unit includes a circuit connected to the fan belonging to one of the units via the switching unit, and a circuit connected to the fan belonging to the other unit without passing through the switching unit. An air blower having a switch for switching between a circuit connected to the blower belonging to the other via the switching means and a circuit connected to the blower belonging to one without passing through the switching means.