WO2023175874A1

WO2023175874A1 - Air conditioner

Info

Publication number: WO2023175874A1
Application number: PCT/JP2022/012501
Authority: WO
Inventors: 優人浦辺
Original assignee: 三菱電機株式会社
Priority date: 2022-03-18
Filing date: 2022-03-18
Publication date: 2023-09-21

Abstract

This air conditioner comprises a suction port for sucking in air from a space to be air conditioned, a blower, a heat exchanger, and a blowout port for blowing air into the space to be air conditioned. Further, the air conditioner comprises: a ventilation duct hole for connection via a duct to a ventilating device which is controlled independently by means of an operating system different from an operating system of the air conditioner; and a control unit for controlling the blower in accordance with control by the operating system of the air conditioner, and, in a state in which the ventilating device is connected to the ventilation duct hole via the duct, determining a driving state of the ventilating device on the basis of a control state of the blower.

Description

air conditioner

The present disclosure relates to an air conditioner.

When air conditioning spaces where moisture tends to accumulate, such as bathrooms, a ventilation device may be required in addition to an air conditioner. To cope with such environments, there are air conditioners equipped with ventilation devices. For example, in an air conditioner equipped with a ventilation device, when the ventilation fan is driven, the air conditioning fan is controlled in relation to the ventilation fan to prevent fluctuations in air conditioning performance. Disclosed. (For example, Patent Document 1).

Japanese Patent Application Publication No. 2001-304661

In the configuration in which the air conditioner is equipped with a ventilation device as in Patent Document 1, the air conditioner becomes large-sized, resulting in deterioration of workability, limitations on installation locations, and the capacity of the ventilation device provided in the air conditioner. There are restrictions on the exhaust route (shape, length, pressure drop). For example, if you use separate products for an air conditioner and a ventilation system, the air conditioner and ventilation system will not be bulky, and you will have more flexibility in where they can be installed, which will reduce the impact on workability. It can be suppressed. However, when using separate products such as an air conditioner and a ventilation system, each is controlled independently by a different operation system, so it is not possible to determine the operating status of the ventilation system from the air conditioner. There is a problem.

The present disclosure has been made in view of the above circumstances, and provides an air conditioner that can easily determine the operating state of a ventilation device that is independently controlled by an operation system different from that of the air conditioner. This is one of the purposes.

An air conditioner according to the present disclosure includes an inlet for sucking air from an air-conditioned space, an air blower, a heat exchanger, and an outlet for blowing air into the air-conditioned space, a ventilation duct hole for connecting via a duct to a ventilation system that is independently controlled by an operation system different from the operation system of the air conditioner; and a control unit that determines the operating state of the ventilation device based on the control state of the blower in a state where the ventilation device is connected to the ventilation duct hole via the duct. .

According to the present disclosure, it is possible to easily determine the operating state of a ventilation device that is independently controlled by an operation system different from the operation system of the air conditioner.

FIG. 1 is a system diagram showing an example of an air conditioning system according to a first embodiment. FIG. 1 is a perspective view showing an example of the appearance of the indoor unit according to the first embodiment. FIG. 2 is a perspective view showing an example of the internal configuration of the cabinet of the indoor unit according to the first embodiment. FIG. 1 is a cross-sectional view showing an example of the internal configuration of the indoor unit according to the first embodiment. 1 is a cross-sectional view showing an example of the structure of a fan motor according to a first embodiment. FIG. 1 is a perspective view showing an example of the appearance of the ventilation device according to the first embodiment. FIG. 1 is a cross-sectional view showing an example of the internal configuration of the ventilation device according to the first embodiment. FIG. 2 is a block diagram showing an example of the configuration of an air conditioning control section and a fan motor drive section according to the first embodiment. FIG. 3 is a diagram showing the correlation between speed command voltage and rotation speed in the case of the centrifugal fan according to the first embodiment. FIG. 3 is a diagram showing the correlation between speed command voltage and rotation speed in the case of the axial fan according to the first embodiment. The figure which shows the example of a structure regarding the output of the information based on the operating state of the ventilation device based on 1st Embodiment. 5 is a flowchart showing an example of a driving state determination process according to the first embodiment. FIG. 7 is a block diagram showing an example of the configuration of an air conditioning control section and a fan motor drive section according to a second embodiment. FIG. 7 is a diagram showing the correlation between current value and rotation speed in the case of a centrifugal fan according to a second embodiment. FIG. 7 is a diagram showing the correlation between current value and rotation speed in the case of the axial fan according to the second embodiment.

Embodiments will be described below with reference to the drawings.
[First embodiment]
First, a first embodiment will be described.

FIG. 1 is a system diagram showing an example of an air conditioning system according to this embodiment.
The illustrated air conditioning system SYS includes an air conditioner 1 and a ventilation device 40.

The air conditioner 1 includes an indoor unit 10, an outdoor unit 20, a liquid extension pipe 2 and a gas extension pipe 3 that connect the indoor unit 10 and the outdoor unit 20, and a remote control 30.

The indoor unit 10 is installed in a closed space in a building (hereinafter referred to as "indoor"), which is an air-conditioned space. The indoor unit 10 includes an indoor heat exchanger (not shown) that executes a part of the refrigeration cycle. The outdoor unit 20 is installed outdoors and includes a compressor that executes part of a refrigeration cycle, an outdoor heat exchanger, an expansion valve (all not shown), and the like. The compressor, outdoor heat exchanger, and expansion valve of the outdoor unit 20 and the indoor heat exchanger of the indoor unit 10 are connected to refrigerant pipes (liquid extension pipe 2, gas extension pipe 3, and connected by pipes (not included).

Furthermore, one end of a ventilation duct 6 for exhausting indoor air to the outdoors is connected to the indoor unit 10, and the other end of the ventilation duct 6 is connected to a ventilation device 40. The ventilation device 40 is further connected to the other end of a ventilation duct 7, one end of which is piped to the outside. Air discharged from the indoor unit 10 passes through the ventilation duct 6, the ventilation device 40, and the ventilation duct 7, and is exhausted to the outside.

The remote controller 30 is a remote controller that accepts user operations regarding ON/OFF (start/stop) of cooling or heating operation of the air conditioner 1, temperature settings during operation, and the like. The remote control 30 is connected to the indoor unit 10 via a wired signal line 4. The remote controller 30 outputs an operation signal based on a user's operation on the remote controller 30. The operation signal output from the remote controller 30 is transmitted via the signal line 4 to the air conditioning control section 150 provided in the indoor unit 10. The air conditioning control unit 150 is configured by a board including electronic components and circuits for controlling each part of the air conditioner 1.

The remote controller 50 is a remote controller that accepts user operations for turning on/off (starting/stopping) the operation of the ventilation system 40, setting air volume during operation, and the like. The remote control 50 is connected to the ventilation device 40 via a wired signal line 5. The remote controller 50 outputs an operation signal based on a user's operation on the remote controller 50. The operation signal output from the remote control 50 is transmitted to the ventilation device control unit 450 of the ventilation device 40 via the signal line 5. The ventilator control unit 450 is configured by a board including electronic components and circuits for controlling each part of the ventilator 40.

In this way, the operation system of the air conditioner 1 (the operation system in which the operation signal is sent from the remote control 30 to the indoor unit 10 via the signal line 4) and the operation system of the ventilation device 40 (the operation system in which the operation signal is sent from the remote control 50 to the indoor unit 10 via the signal line 5) This is a different operation system from the operation system in which the operation signal is sent to the ventilation device 40. The air conditioner 1 is independently controlled by the operation system of the air conditioner 1. The ventilation device 40 is independently controlled by the operation system of the ventilation device 40. In other words, the air conditioner 1 and the ventilation device 40 are connected to the indoor unit 10 and the ventilation device 40 by the ventilation duct 6, but are not electrically connected and are controlled separately by operating separate remote controllers. will be held.

Note that the specifications of the ventilation device 40 are selected depending on the volume of the room to be ventilated. Further, when selecting the specifications, the specifications are selected by taking into consideration the pressure loss of the air conditioner 1 and the duct pressure loss of the ventilation duct, which varies depending on each building. Since the route and length of the ventilation duct differ depending on each building, the specifications of the ventilation system 40 suitable for each building are selected.

(Indoor unit configuration)
Next, the configuration of the indoor unit 10 will be described in detail with reference to FIGS. 2 to 4.
FIG. 2 is a perspective view showing an example of the appearance of the indoor unit according to the present embodiment. The indoor unit 10 covers a cabinet 11 that is a substantially rectangular box (a bottomed housing with a square cross section) with an open bottom side when installed indoors (on the ceiling), and the open side (bottom side) of the cabinet 11. A rectangular decorative panel 12 is provided. The decorative panel 12 has an inlet 13 (opening) and an outlet 14 formed therein. The cabinet 11 is provided with a ventilation duct hole 15 to which the ventilation duct 6 is connected.

FIG. 3 is a perspective view showing an example of the internal configuration of the cabinet of the indoor unit according to the present embodiment. Note that this FIG. 3 shows a state in which the decorative panel 12 has been removed from FIG. 2, and the side to which the decorative panel 12 is attached is the upper side in the illustration. Moreover, FIG. 4 is a sectional view showing an example of the internal configuration of the indoor unit according to the present embodiment.

A blower 110 is installed on the blower room 16 side of the cabinet 11. The blower 110 includes a fan motor 111,

fans

112 and 113, and a fan casing 114. Fan motor 111 is a motor for rotating

fans

112 and 113.

Fans

112 and 113 are attached to a rotating shaft of a fan motor 111. In the example shown in FIG. 3, two

sirocco type fans

112 and 113 are installed on both sides of the fan motor 111 on both shafts. The illustrated configuration of the blower 110 is an example, and the type of fan, number of fans, number of fan motors, etc. may vary depending on the size and cost of the indoor unit 10 (unit), and the capacity required of the air conditioner 1. Set.

An indoor heat exchanger 120 is arranged on the wind blowing side of the blower 110. The piping component 125 is provided with refrigerant piping and the like connected to the indoor heat exchanger 120. An air passage 17 is configured on the downstream side of the indoor heat exchanger 120 (downstream side of the air from the blower 110), and an inner cover is provided to insulate the air heat exchanged in the indoor heat exchanger 120 from the outside of the indoor unit 10. , are arranged inside the top and side surfaces of the cabinet 11 so as to surround the indoor heat exchanger 120. Further, a drain pan 19 that receives condensed water generated during heat exchange and serves as one of the elements constituting the air passage 17 is arranged at the lower part of the indoor heat exchanger 120 (on the decorative panel 12 side). A decorative panel 12 is attached to the lower part of the drain pan 19.

In the decorative panel 12, a filter 121 is provided at the suction port 13 (opening) communicating with the blower chamber 16 of the cabinet 11 to prevent dust and the like from entering the interior of the indoor unit 10. The filter 121 is supported by a grill 131 provided at the suction port 13 or by the decorative panel itself. The grill 131 has a mesh structure that functions as a blindfold. Further, the air outlet 14 formed in the decorative panel 12 communicates with an air passage 17 formed by an inner cover 18 and a drain pan 19. The fan casing 114 includes a bell mouth for smoothly introducing air sucked in from the suction port 13 into the

fans

112, 113, and is arranged so as to surround the

fans

112, 113.

Air sucked in from the suction port 13 flows toward the indoor heat exchanger 120 by rotating the

fans

112 and 113, undergoes heat exchange in the indoor heat exchanger 120, passes through the air path 17, and is blown out from the blowout port 14. A wind direction vane 141 that can control the blowing direction in the vertical direction is installed at the blower outlet 14 . Note that the air outlet 14 may be provided with a wind direction flap that can control the air blowing direction in the left and right directions.

A ventilation duct hole 15 is provided on the side surface of the blower room 16 to connect the ventilation duct 6. The diameter of the ventilation duct hole 15 is selected depending on the diameter of the ventilation duct 6, or the size and shape are designed in accordance with the pressure loss design within the air conditioner 1. Note that the ventilation duct hole 15 does not need to be circular, and may be oval or square. For example, the specifications of the ventilation duct hole 15 are determined from those specified by industrial standards.

Note that in order to design the pressure loss inside the air conditioner 1, a pressure loss design may be made such as providing an obstacle (not shown) between the ventilation duct hole 15 and the blower 110. Thereby, when the air is exhausted through the ventilation device 40, it is also possible to suppress the deterioration of the performance of the air conditioner 1 to some extent.

(Fan motor configuration)
FIG. 5 is a cross-sectional view showing an example of the structure of the fan motor according to this embodiment. The illustrated fan motor 111 is a brushless DC motor. The fan motor 111 mainly includes a rotor 161 and a stator 162.

The rotor 161 is arranged inside the stator 162 and has a magnet 165 made of a permanent magnet arranged on the outer circumferential side of the rotating shaft 164 facing the stator core 163. The magnet 165 is fastened to the rotating shaft 164. Note that resin, rubber, or the like may be interposed between the magnet 165 and the rotating shaft 164. The rotating shaft 164 is held by a bearing (not shown) and rotates in the rotational direction. The stator 162 includes a stator core 163 configured by laminating electromagnetic steel plates, an insulator 167 for insulating the winding 166, and a stator core 163 that is wound around each slot of the stator core 163 that is integrated with the insulator 167. The winding 166 is configured to include a winding 166.

Further, the fan motor 111 includes a fan motor drive unit 200 that includes a board on which a circuit for driving the fan motor 111 is mounted. Note that the fan motor drive unit 200 may not be built into the fan motor 111 but may be provided in a higher-level system (for example, on the air conditioner 1 side). In this embodiment, an example of a configuration in which the fan motor drive section 200 is built into the fan motor 111 will be described.

(Configuration of ventilation system)
Next, the configuration of the ventilation device 40 will be described in detail with reference to FIGS. 6 and 7. FIG. 6 is a perspective view showing an example of the appearance of the ventilation device according to the present embodiment. Moreover, FIG. 7 is a sectional view showing an example of the internal configuration of the ventilation device according to the present embodiment.

The casing of the ventilation device 40 is provided with

duct connection ports

41 and 42, a power line connection portion 43, and a ceiling mount fitting 44. The duct connection port 41 is a duct hole on the suction side (upstream side) to which the ventilation duct 6 is connected. The duct connection port 42 is a duct hole on the outlet side (downstream side) to which the ventilation duct 7 is connected. A power line that supplies power to the ventilation device 40 is connected to the power line connection portion 43 . A plurality of ceiling mount fittings 44 are provided and are used as a support part when installing the ventilation device 40.

Further, inside the ventilation device 40, a blower 45 and a ventilation device control section 450 that controls the drive of the blower 45 are provided. The blower 45 includes a ventilation fan 46, a fan motor (not shown) for rotating the ventilation fan 46, a fan casing 47 for allowing air to flow smoothly through the ventilation device 40, and the like.

The ventilation device control unit 450 is connected to the signal line 5 from the remote controller 50, and controls the operating state according to the user's operation on the remote controller 50. For example, in the ON state (operating state), the ventilation system control unit 450 drives the blower 45 of the ventilation system 40 to control the air taken in from the duct connection port 41 (the air sent from the indoor unit 10). The indoor air) is blown out from the duct connection port 42 through the ventilation duct 7 to the outside. On the other hand, in the operation OFF state (operation stopped state), the ventilation device control unit 450 stops the blower 45 of the ventilation device 40, so that the ventilation function is stopped.

(About control)
Next, control of the air conditioner 1 according to this embodiment will be explained. The air conditioning control unit 150 controls the execution of the refrigeration cycle (compressor of the outdoor unit 20) and the operation of the blower 110 based on the operation signal from the remote controller 30. In this embodiment, an example is shown in which the air conditioning control unit 150 is installed in the indoor unit 10 as shown in FIG. Alternatively, the indoor unit 10 and the outdoor unit 20 may be provided separately.

Additionally, the air conditioning control unit 150 determines the operating state of the ventilation device 40 connected via the ventilation duct 6. For example, the air conditioning control unit 150 determines the operating state of the ventilation device 40 based on the control state of the blower 110. Hereinafter, with reference to FIG. 8, a configuration for determining the operating state of the ventilation device 40 based on the control state of the blower 110 will be described in detail.

FIG. 8 is a block diagram showing an example of the configuration of the air conditioning control section and fan motor drive section according to the present embodiment. The blower 110 includes a circuit including a fan motor drive unit 200 including a board on which a power IC 201 and a control IC 202 are mounted, and a magnetic sensor 210 (for example, a Hall IC) that detects the position of the rotor 161 of the fan motor 111. It is equipped with Power IC 201 and winding 166 of stator 162 are connected via winding terminals. The board of the fan motor drive section 200 is connected to the board of the air conditioning control section 150 via lead wires.

Note that the control IC 202 may be composed of, for example, a microcomputer. Further, the control IC 202 and the power IC 201 may be configured as one IC. The power IC 201 switches at appropriate timing depending on the magnetic pole position of the magnet 165 of the rotor 161. As a result, the fan motor 111, which is a brushless DC motor, obtains rotational power. This switching signal is generated by the control IC 202.

The control IC 202 outputs a switching signal according to the speed command voltage (Vsp) output from the air conditioning control unit 150 to the power IC 201. Power IC 201 applies voltage to winding 166 of stator 162 in response to this switching signal. This generates a magnetic field in the stator 162, and the rotor 161 is drawn in, causing the fan motor 111 to rotate or change its rotational speed. That is, the speed command voltage (Vsp) from the air conditioning control unit 150 determines the rotation speed of the blower 110 (fan motor 111). Note that the "number of rotations" refers to the number of rotations per unit time. Further, the control IC 202 outputs a rotation speed signal indicating the rotation speed of the blower 110 to the air conditioning control unit 150 based on the detection result of the magnetic sensor 210.

The air conditioning control unit 150 is configured to include a CPU (Central Processing Unit) or a microcomputer, a memory (storage unit), various devices, and the like. The illustrated air conditioning control unit 150 includes a voltage control unit 151, a rotation speed detection unit 152, an operating state determination unit 153, and an output control unit 154 as functional configurations realized by, for example, a CPU executing a program. We are prepared. The air conditioning control unit 150 also includes a storage unit 155 that stores various data.

The voltage control unit 151 outputs a bus voltage (Vdc) for rotating the fan motor 111 and a control voltage (Vcc) for driving the control IC 202 to the fan motor drive unit 200. Further, the voltage control section 151 controls a speed command voltage (Vsp) for driving the blower 110 so that the rotation speed becomes a desired rotation speed, and outputs the speed command voltage (Vsp) to the fan motor drive section 200 (control IC 202).

The rotation speed detection section 152 detects the rotation speed of the blower 110 by acquiring the rotation speed signal output from the fan motor drive section 200 (control IC 202). As a result, information on the rotation speed of the blower 110 is transmitted (feedback) from the fan motor drive section 200 to the air conditioning control section 150.

The voltage control unit 151 performs feedback control of the rotation speed of the fan 110 based on information on the rotation speed of the fan motor 111 detected by the rotation speed detection unit 152. The voltage control unit 151 controls the speed command voltage (Vsp) based on the detected rotation speed of the fan motor 111 so that the blower 110 has a predetermined rotation speed. The fan motor 111 is driven by the fan motor drive section 200 according to its speed command voltage (Vsp), and the rotation speed is determined.

The relationship between the rotation speed and air volume changes due to pressure loss (hereinafter referred to as "pressure loss") in the air passage 17 of the indoor unit 10 or temperature change (density change) of the air, but from the perspective of the fan motor 111, the rotation This means that the relationship between number and torque changes.

Here, in a normal load state, there is a certain correlation between the rotation speed of the blower 110 and the speed command voltage (Vsp). However, if a change occurs such as worsening of the pressure drop on the air passage 17, the relationship between the rotation speed and the air volume (=torque) changes, and the speed command voltage (Vsp) required to rotate the desired rotation speed changes. It will change. In other words, the relationship between the rotation speed and the speed command voltage (Vsp) changes due to a change in the pressure loss of the indoor unit 10.

The relationship between the rotational speed of the indoor unit 10 due to the load and the speed command voltage (Vsp) differs depending on the type of fan of the blower 110. For example, in the case of centrifugal fans (sirocco fans, turbo fans, cross flow fans, etc.) such as the

fans

112 and 113 shown in FIG. In this case, the force of the blades bending the wind is small, so the torque is small. Therefore, the larger the pressure loss, the smaller the torque load, and the smaller the speed command voltage (Vsp) for producing the desired rotation speed.

When the ventilation device 40 is in the ON state, pressure loss is applied to the fan, so the torque load becomes small and the speed command voltage (Vsp) for producing the desired rotation speed becomes small. On the other hand, when the ventilation device 40 is in an OFF state, the torque load is applied to the indoor unit 10 alone to which the ventilation device 40 is not connected.

The operating state determination unit 153 uses the fact that the relationship between the rotation speed of the blower 110 and the speed command voltage (Vsp) changes depending on the load on the indoor unit 10 to determine whether the ventilation device 40 connected via the ventilation duct 6 Determine driving status.

FIG. 9 is a diagram showing the correlation between the speed command voltage (Vsp) and the rotation speed in the case of a centrifugal fan. In this figure, the horizontal axis is the rotation speed of the blower 110, and the vertical axis is the speed command voltage (Vsp). (A) in FIG. 9 shows conditions for determining that the ventilation device 40 is in the ON state. On the other hand, (B) of FIG. 9 shows conditions for determining that the ventilation device 40 is in an OFF state.

The speed command voltage threshold (Vspm) is a threshold for determining whether the ventilation device 40 is in an ON state or in an OFF state. For example, the speed command voltage threshold (Vspm) is the actual speed command voltage (Vsp) when the ventilation device 40 is in an ON state, and the actual speed command voltage (Vsp) when the ventilation device 40 is in an OFF state. This is a design value set in advance based on the following.

As shown in (A) of FIG. 9, the conditions for determining that the ventilation device 40 is in the operation ON state are such that the speed command voltage (Vsp) is the speed command voltage threshold when compared under the same rotation speed condition. (Vspm) (Vsp<Vspm). On the other hand, as shown in FIG. 9B, the conditions for determining that the ventilation device 40 is in the OFF state are such that when compared under the same rotation speed condition, the speed command voltage (Vsp) is The voltage is equal to or higher than the voltage threshold (Vspm) (Vsp≧Vspm).

Information indicating the determination conditions shown in FIG. 9 (determination condition information) is stored in the storage unit 155. The operating state determination unit 153 determines whether the ventilation device 40 is operating based on the speed command voltage (Vsp) controlled by the voltage control unit 151, the rotation speed of the blower 110 detected by the rotation speed detection unit 152, and the above-mentioned determination condition information. Determine driving status.

For example, the operating state determination unit 153 compares the speed command voltage (Vsp) and the speed command voltage threshold (Vspm) under the same condition when the rotation speed of the blower 110 is the same, and the speed command voltage (Vsp) is compared with the speed command voltage threshold (Vspm). If it is less than the threshold value (Vspm) (Vsp<Vspm), it is determined that the operating state of the ventilation device 40 is in the ON state. On the other hand, when the speed command voltage (Vsp) is equal to or higher than the speed command voltage threshold (Vspm) (Vsp≧Vspm), the operating state determining unit 153 determines that the operating state of the ventilation device 40 is the operating OFF state. do.

Note that when the type of fan of the blower 110 is an axial fan (propeller fan), the determination conditions are different from those for the above-mentioned centrifugal fan. In the case of an axial fan, when the pressure drop increases, the force that pushes the wind forward (in the axial direction) decreases, so the wind flows in the centrifugal direction of the blades. Since a larger torque is required to blow air in the centrifugal direction, a larger torque is generated. Therefore, the larger the pressure loss, the larger the torque load, and the larger the speed command voltage (Vsp) for producing the desired rotation speed.

When the ventilation device 40 is in the ON state, pressure loss is applied to the fan, so the torque load becomes large and the speed command voltage (Vsp) for producing the desired rotation speed becomes large. On the other hand, when the ventilation device 40 is in an OFF state, the torque load is applied to the indoor unit 10 alone to which the ventilation device 40 is not connected.

FIG. 10 is a diagram showing the correlation between the speed command voltage (Vsp) and the rotation speed in the case of an axial fan. In this figure, the horizontal axis is the rotation speed of the blower 110, and the vertical axis is the speed command voltage (Vsp). (A) of FIG. 10 shows the conditions for determining that the ventilation device 40 is in the ON state. On the other hand, (B) of FIG. 10 shows conditions for determining that the ventilation device 40 is in an OFF state.

As shown in (A) of FIG. 10, the conditions for determining that the ventilation device 40 is in the ON state are such that the speed command voltage (Vsp) is the speed command voltage threshold when compared under the same rotation speed condition. (Vspm) or more (Vsp≧Vspm). On the other hand, as shown in FIG. 10 (B), the conditions for determining that the ventilation device 40 is in the OFF state are such that when compared under the same rotation speed condition, the speed command voltage (Vsp) is It is less than the voltage threshold (Vspm) (Vsp<Vspm).

In the case of an axial fan, the determination condition information shown in FIG. 10 is stored in the storage unit 155. For example, the operating state determination unit 153 compares the speed command voltage (Vsp) and the speed command voltage threshold (Vspm) under the same condition when the rotation speed of the blower 110 is the same, and the speed command voltage (Vsp) is compared with the speed command voltage threshold (Vspm). If the threshold value (Vspm) or more (Vsp≧Vspm), it is determined that the operating state of the ventilation device 40 is in the ON state. On the other hand, when the speed command voltage (Vsp) is less than the speed command voltage threshold (Vspm) (Vsp<Vspm), the operating state determining unit 153 determines that the operating state of the ventilation device 40 is in the OFF state. do.

In this way, the magnitude relationship between the speed command voltage (Vspc) and the speed command voltage threshold (Vspm) differs depending on the type of fan used. Therefore, in the control for determining the operating state of the ventilation device 40, the magnitude relationship between the speed command voltage (Vspc) and the speed command voltage threshold (Vspm), which are the determination conditions, is changed depending on the type of fan.

Returning to FIG. 8, the output control unit 154 outputs information based on the operating state of the ventilation device 40 determined by the operating state determining unit 153 to the remote controller 30. Further, the output control unit 154 may output information based on the operating state of the ventilation device 40 determined by the operating state determining unit 153 to the mobile terminal 70.

FIG. 11 is a diagram illustrating a configuration example regarding output of information based on the operating state of the ventilation device according to the present embodiment. As explained in FIG. 1, the indoor unit 10 and the remote controller 30 are connected by a wired signal line 4. Note that the indoor unit 10 and the remote controller 30 may be connected by wireless communication.

The remote controller 30 can be operated by the user to command the start or stop of the refrigeration cycle, set air conditioning operation modes such as cooling, heating, and drying, set the temperature of the blown air, and control the direction and speed of the blown air. Operation signals for setting air conditioning conditions such as the above are transmitted to the indoor unit 10 via the signal line 4.

Furthermore, the output control unit 154 of the indoor unit 10 transmits information based on the operating state of the ventilation device 40 to the remote controller 30 via this signal line 4. The remote controller 30 includes a display section 31 and displays information based on the operating state of the ventilation device 40 transmitted from the indoor unit 10 on the display section 31. The display section 31 includes a display device such as a liquid crystal display. By displaying the operating status of the ventilation device 40 by the remote controller 30, the user can check the operating status of the ventilation device 40 on the display screen of the remote controller 30.

Note that the output control unit 154 may transmit information based on the operating state of the ventilation device 40 to the remote control 30 or the mobile terminal 70 only when it is determined that the ventilation device 40 is in the ON state.

Here, the information based on the operating state of the ventilation device 40 is information indicating the operating state of the ventilation device 40, for example. The information indicating the operating state is, for example, "operating ON", "running", "driving", "operating OFF", "stopped", etc.

Furthermore, the information based on the operating state of the ventilation device 40 may be information that presents appropriate operation details to the user based on the operating state of the ventilation device 40. For example, it is also possible to display on the remote control 30 the optimum state for the current operating mode of the air conditioner 1. As an example, when the operation mode of the air conditioner 1 is "cooling", the air conditioner 1 sucks in room air, exchanges heat with it, and blows out cold air. At this time, if the ventilation device 40 is in the ON state, the amount of air taken in decreases, so the desired amount of air cannot be secured, and the maximum capacity may not be secured. Also, unnecessary power is consumed. Therefore, by displaying on the remote controller 30 a message such as ``It is more efficient to cool down the air conditioner by stopping the ventilation system during cooling operation.Why don't you stop the ventilation system?'', the optimal operating state can be suggested to the user. I can do it.

Although the remote control 30 is mainly used to operate the air conditioner 1, the mobile terminal 70 used by the user may be used instead of or in addition to the remote control 30. For example, the indoor unit 10 may be connectable to the mobile terminal 70 via wireless communication. The mobile terminal 70 is an electronic device used by a user, such as a smartphone or a tablet-type PC (Personal Computer). For example, the output control unit 154 includes a communication device compatible with wireless communication such as Wi-Fi (registered trademark), and transmits information based on the operating state of the ventilation device 40 to the mobile terminal 70. The mobile terminal 70 includes a display section 71 and displays information based on the operating state of the ventilation device 40 transmitted from the indoor unit 10 on the display section 71. The display section 71 includes a display device such as a liquid crystal display. Similar to the remote control 30, the mobile terminal 70 obtains similar effects by displaying information based on the operating state of the ventilation device 40.

(Operation of ventilation system operating state determination processing)
Next, with reference to FIG. 12, the operation of the operating state determination process in which the air conditioning control unit 150 determines the operating state of the ventilation device 40 will be described.
FIG. 12 is a flowchart illustrating an example of the driving state determination process according to the present embodiment. Here, the processing operation when the fan of the blower 110 is a centrifugal fan will be described.

In the stopped state, when an operation to start a cooling operation or a heating operation (operation ON) is performed using the remote control 30, the air conditioning control unit 150 acquires an operation signal for operation ON from the remote controller 30 (step S101).

When the air conditioning control unit 150 receives the operation signal to turn on the operation, the air conditioning control unit 150 uses the air conditioning conditions set in advance, such as the blowing air temperature, blowing air direction, and wind speed, or based on the new settings set by the user by operating the remote control 30. Cooling operation or heating operation is started based on air conditioning conditions such as a set temperature, and the compressor (not shown) of the outdoor unit 20 is operated and the fan motor 111 is rotated at a target rotation speed. Specifically, the air conditioning control unit 150 transmits a speed command voltage (Vspc) for achieving the target rotation speed to the fan motor drive unit 200, so that the fan motor 111 rotates and the blower 110 is operated. will be started. (Step S103)

Next, when the blower 110 starts operating, information on the actual rotational speed (actual rotational speed) of the blower 110 is fed back from the fan motor drive section 200 to the air conditioning control section 150. The air conditioning control unit 150 acquires information on the actual rotation speed of the blower 110 from the fan motor drive unit 200 (step S105).

The air conditioning control unit 150 calculates a speed command voltage (Vspc) based on the information on the actual rotation speed of the blower 110 so as to reach the target rotation speed, and controls the speed command voltage (Vspc) to the calculated speed command voltage (Vspc) (step S107). .

The air conditioning control unit 150 reads the determination condition based on the correlation between the speed command voltage (Vsp) and the rotation speed (see FIG. 9) from the storage unit 155, and sets the speed command voltage (Vsp) and the speed command voltage threshold (Vspm). are compared when the rotational speed of the blower 110 is the same (step S109).

As a result of the comparison in step S109, if the speed command voltage (Vsp) is less than the speed command voltage threshold (Vspm) (Vsp<Vspm), the air conditioning control unit 150 determines that the ventilation device 40 is in the ON state (operating). state) (step S111).

If the air conditioning control unit 150 determines in step S111 that the ventilation device 40 is in the ON state, it transmits information indicating that the ventilation device 40 is in the ON state to the remote controller 30. As a result, the remote control 30 displays information indicating that the ventilation device 40 is in the ON state. Note that instead of or in addition to the information indicating that the ventilation system 40 is in the ON state, information indicating appropriate operation details based on the operating state of the ventilation system 40 (for example, "In cooling operation, the ventilation system is turned off." "How about turning off the ventilation system?").

Furthermore, the air conditioning control unit 150 determines whether or not the operation of the air conditioner 1 is turned off using the remote controller 30, based on the operation signal transmitted from the remote controller 30 (step S115). If the air conditioning control unit 150 determines that the operation OFF operation has not been performed using the remote controller 30 (NO), the process returns to step S105. On the other hand, if the air conditioning control unit 150 determines that the operation to turn off the operation has been performed using the remote controller 30 (YES), the air conditioner control unit 150 stops the operation of the air conditioner 1 (step S117), and ends the process.

On the other hand, if the speed command voltage (Vsp) is equal to or higher than the speed command voltage threshold (Vspm) (Vsp≧Vspm) as a result of the comparison in step S109, the air conditioning control unit 150 determines that the ventilation device 40 is in an OFF state (not in operation). (step S121).

If the air conditioning control unit 150 determines in step S121 that the ventilation device 40 is in the OFF state, the air conditioner 1 is turned OFF using the remote controller 30 based on the operation signal transmitted from the remote controller 30. It is determined whether or not it has been performed (step S123). If the air conditioning control unit 150 determines that the operation OFF operation has not been performed using the remote controller 30 (NO), the process returns to step S105. On the other hand, if the air conditioning control unit 150 determines that the operation to turn off the operation has been performed using the remote controller 30 (YES), the air conditioner control unit 150 stops the operation of the air conditioner 1 (step S125), and ends the process.

Regarding the concept of this speed command voltage threshold, the "relationship between the rotation speed and the speed command voltage" at the time of normal load is memorized, and the speed command voltage at the time of normal load and the relationship controlled by the voltage control unit 151 are A method may also be used in which the difference from the speed command voltage (Vspc) is measured, and when the difference exceeds a certain threshold, it is determined that the ventilation device 40 is in an OFF state.

Note that the operation state determination process shown in FIG. 12 is an example of the process when the fan of the blower 110 is a centrifugal fan, but in the case of an axial fan, the process in step S109 may be changed. For example, in the operation state determination process for an axial fan, the air conditioning control unit 150 turns on the ventilation device 40 when the speed command voltage (Vsp) is equal to or higher than the speed command voltage threshold (Vspm) (Vsp≧Vspm). It is determined that the vehicle is in the state (driving state) (step S111). Furthermore, when the speed command voltage (Vsp) is less than the speed command voltage threshold (Vspm) (Vsp<Vspm), the air conditioning control unit 150 determines that the ventilation device 40 is in an OFF state (not in operation). Determination is made (step S121).

Furthermore, whether or not to perform the operating state determination process for determining the operating state of the ventilation device 40 according to the present embodiment can be set at the time of construction of the air conditioner 1, etc. For example, when the air conditioner 1 and the ventilation device 40 are not connected, the operation state determination process may not be performed. Furthermore, even if the air conditioner 1 and the ventilation device 40 are connected, if there is an intention not to perform the process of determining the operating state of the ventilation device 40, it is possible to leave the operation state determination process unimplemented. It is.

Furthermore, the pressure loss of the indoor unit 10 increases over time due to the accumulation of dust on the filter 121 and the like. Therefore, due to the accumulation of dust on the filter 121, etc., the speed command voltage gradually changes over time (decreases in the case of a centrifugal fan and increases in the case of an axial fan). If the increase or decrease in the speed command voltage over time straddles the speed command voltage threshold (Vspm) of the determination conditions (see FIGS. 9 and 10) stored in the storage unit 155, the operating state of the ventilation device 40 is changed to "operation". Even if it is OFF, it may be mistakenly determined that the operation is ON. Therefore, when the cumulative operating time of the air conditioner 1 has reached a predetermined cumulative time, the operating state determination process may be disabled.

For example, the cumulative operating time of the air conditioner 1 is measured by the air conditioning control unit 150 and stored in the storage unit 155. The air conditioning control unit 150 may have a function of displaying a "filter cleaning sign" on the remote control 30 or the mobile terminal 70 when the cumulative operating time reaches a predetermined cumulative time. The air conditioning control unit 150 may use this cumulative driving time to invalidate the driving state determination process when the cumulative driving time has reached a predetermined cumulative time as described above.

As described above, the air conditioner 1 according to the present embodiment includes the suction port 13 that sucks air from the air-conditioned space (for example, indoors), the blower 110, and the indoor heat exchanger 120 (an example of a heat exchanger). ) and an air outlet 14 that blows out air into the air-conditioned space. The air conditioner 1 also has a ventilation duct for connecting via a ventilation duct 6 (an example of a duct) to a ventilation device 40 that is independently controlled by an operation system different from the operation system of the air conditioner 1. A hole 15 is provided. Then, the air conditioner 1 controls the blower 110 according to the control by the operation system of the air conditioner 1, and in a state where the ventilation device 40 is connected to the ventilation duct hole 15 via the ventilation duct 6, The operating state of the ventilation device 40 is determined based on the control state of the blower 110.

As a result, even if the air conditioner 1 is connected via the ventilation duct 6 to the ventilation device 40, which is independently controlled by an operation system different from that of the air conditioner 1, the air conditioner 1 can The operating state of the ventilation device 40 can be easily determined using the information in the conditioner 1. Therefore, the air conditioner 1 can support the user in optimal air conditioning operation in the air-conditioned space, taking into consideration the ventilation operation of the ventilation device 40.

For example, the air conditioner 1 controls a speed command voltage (an example of a voltage) for driving the blower 110 so that the rotation speed of the blower 110 becomes a desired rotation speed (for example, a target rotation speed). Furthermore, the air conditioner 1 detects the rotation speed of the blower 110 driven by the speed command voltage (Vspc). The air conditioner 1 also stores in the storage unit 155 determination condition information (first information, see FIG. 9 or 10) based on the correlation between the rotation speed of the blower 110 and the speed command voltage (Vspc). . Then, the air conditioner 1 determines the operating state of the ventilation device 40 based on the speed command voltage (Vspc), the rotation speed of the blower 110, and the determination condition information.

As a result, the air conditioner 1 utilizes the fact that the relationship between the voltage that drives the blower 110 and the rotational speed of the blower 110 changes depending on the load of the indoor unit 10 to provide ventilation to the air conditioner connected via the ventilation duct 6. The operating state of the device 40 can be easily determined.

Specifically, the determination condition information includes information on a speed command voltage threshold (Vspm) indicating a threshold of the speed command voltage with respect to the rotation speed of the blower 110. The air conditioner 1 determines the operating state of the ventilation device 40 based on the result of comparing the speed command voltage (Vspc) and the speed command voltage threshold (Vspm) under the condition that the rotation speed of the blower 110 is the same.

Furthermore, the operation system of the air conditioner 1 includes a remote control 30 that commands and sets the operation of the air conditioner 1. The air conditioner 1 outputs information based on the determined operating state of the ventilation device 40 to the remote controller 30.

Thereby, the air conditioner 1 can display the operating state of the ventilation device 40 on the remote control 30, so that the operating state of the ventilation device 40 can be easily communicated to the user.

Additionally, the air conditioner 1 includes a communication device (communication unit) that can communicate with a mobile terminal 70 (an example of a terminal device) using wireless communication. The air conditioner 1 outputs information based on the determined operating state of the ventilation device 40 to the mobile terminal 70 via the communication device.

Thereby, the air conditioner 1 can display the operating state of the ventilation device 40 on the mobile terminal 70 carried by the user, so that the operating state of the ventilation device 40 can be easily communicated to the user.

Note that instead of or in addition to transmitting the operating state of the ventilation device 40 to the user through a display, the air conditioner 1 may transmit the operating state to the user through a buzzer, voice, or the like.

For example, the air conditioner 1 may output, as information based on the operating state of the ventilation device 40, information that presents the user with appropriate operation details based on the operating state of the ventilation device 40. For example, based on the operating status of the ventilation system 40, the air conditioner 1 sends a message to the remote control 30 or mobile terminal 70 saying, "During cooling operation, it will be more efficient to turn off the ventilation system to cool the room. Why not stop the ventilation system?" ” may be displayed.

Thereby, the air conditioner 1 can suggest to the user an optimal operating state that also takes into consideration the ventilation operation of the ventilation device 40, depending on the operating state of the ventilation device 40.

[Second embodiment]
Next, a second embodiment will be described.
In the first embodiment, the operating state of the ventilator 40 was determined by setting a threshold value for the speed command voltage (Vspc), but in this embodiment, the current value flowing through the fan motor 111 is replaced with the speed command voltage. Make a judgment using . This determination method is effective, for example, in the case of a configuration in which a circuit for driving the fan motor 111 is provided on a board on the indoor unit 10 side.

FIG. 13 is a block diagram showing an example of the configuration of the air conditioning control section and fan motor drive section according to the present embodiment. In this embodiment, the fan motor drive unit 200A is mounted on a board on the air conditioner 1 (here, the indoor unit 10) side. In this embodiment, the configuration corresponding to the air conditioning control section 150 in the first embodiment is an air conditioning control section 150A, and the air conditioning control section 150A includes a fan motor drive section 200A. Further, the blower 110A according to the present embodiment differs from the blower 110 according to the first embodiment in that it does not include a fan motor drive section.

The fan motor drive unit 200A includes a power IC 201A, a control IC 202A, and a current detection unit 203A. The current detection unit 203A can measure the value of the current flowing through the windings of the fan motor 111. Since this current value has a correlation with the torque generated by the fan motor 111, the pressure loss load of the indoor unit 10 can be predicted from the current value. Therefore, it becomes possible to determine the operating state of the ventilation device 40 from information on this current value.

The power IC 201A and the control IC 202A correspond to the power IC 201A and the control IC 202A in FIG. 8, respectively. In addition to the fan motor drive section 200A, the air conditioning control section 150A includes a rotation speed instruction section 151A, an operating state determination section 153A, an output control section 154A, and a storage section 155A.

Requested rotation speed information for rotating the fan motor 111 at a target rotation speed is input from the rotation speed instruction section 151A to the control IC 202A of the fan motor drive section 220A. The control IC 202A generates a drive signal according to the input required rotation speed information and outputs it to the power IC 201A. Power IC 201 and winding 166 of stator 162 are connected via winding terminals. The power IC 201A generates pulses according to the drive signal input from the control IC 202A, and applies voltage to the winding 166 of the stator 162 of the fan motor 111. As a result, the fan motor 111 rotates at the target rotation speed.

Here, the load fluctuation of the indoor unit 10 is correlated with the magnitude of the phase current flowing through the fan motor 111. The larger the load on the indoor unit 10, the larger the current flowing through each phase current. The rotation speed of the fan motor 111 is controlled by changing the voltage applied to the winding 166 according to the magnitude of the phase current. The voltage is changed depending on the ON time of the pulse, and the longer the average ON time, the higher the voltage (that is, the rotation speed increases).

The operating state determination unit 153A determines the operation of the ventilation device 40 connected via the ventilation duct 6 by utilizing the fact that the current value flowing through the winding of the fan motor 111 is correlated with the torque generated by the fan motor 111. Determine the condition.

With reference to FIGS. 14 and 15, conditions for determining the operating state of the ventilation device 40 according to the present embodiment will be described.

FIG. 14 is a diagram showing the correlation between the current value (Ic) and the rotation speed in the case of a centrifugal fan. In this figure, the horizontal axis represents the rotational speed of the blower 110A, and the vertical axis represents the current value (Ic) flowing through the winding of the fan motor 111. (A) of FIG. 14 shows conditions for determining that the ventilation device 40 is in the ON state. On the other hand, (B) of FIG. 14 shows conditions for determining that the ventilation device 40 is in an OFF state.

The current threshold value (Im) is a threshold value for determining whether the ventilation device 40 is in an ON state or in an OFF state. For example, the current threshold (Im) is based on the actual current threshold (Im) when the ventilation device 40 is in the ON state and the actual current threshold (Im) when the ventilation device 40 is in the OFF state. This is a preset design value.

As shown in (A) of FIG. 14, the conditions for determining that the ventilation device 40 is in the ON state are such that the current value (Ic) is equal to the current threshold value (Im) when compared under the same rotation speed condition. (Ic<Im). On the other hand, as shown in FIG. 14(B), the conditions for determining that the ventilation device 40 is in the OFF state are such that the current value (Ic) is the current threshold ( Im) or more (Ic≧Im).

The determination condition information shown in FIG. 14 is stored in the storage unit 155A. The operating state determination unit 153A determines the operating state of the ventilation device 40 based on the current value (Ic) flowing through the winding of the fan motor 111, the rotational speed of the blower 110A, and the above-mentioned determination condition information.

For example, the operating state determination unit 153A compares the current value (Ic) and the current threshold value (Im) when the rotation speed of the blower 110A is the same condition, and determines that the current value (Ic) is less than the current threshold value (Im) ( If Ic<Im), it is determined that the operating state of the ventilation device 40 is ON. On the other hand, when the current value (Ic) is greater than or equal to the current threshold value (Im) (Ic≧Im), the operating state determination unit 153A determines that the operating state of the ventilation device 40 is in the OFF state.

FIG. 15 is a diagram showing the correlation between the current value (Ic) and the rotation speed in the case of an axial fan. In this figure, the horizontal axis represents the rotational speed of the blower 110A, and the vertical axis represents the current value (Ic) flowing through the winding of the fan motor 111. (A) of FIG. 15 shows the conditions for determining that the ventilation device 40 is in the ON state. On the other hand, (B) of FIG. 15 shows conditions for determining that the ventilation device 40 is in an OFF state.

As shown in (A) of FIG. 15, the conditions for determining that the ventilation device 40 is in the ON state are such that the current value (Ic) is equal to the current threshold value (Im) when compared under the same rotation speed condition. or more (Ic≧Im). On the other hand, as shown in FIG. 15(B), the conditions for determining that the ventilation device 40 is in the OFF state are such that the current value (Ic) is the current threshold ( Im) (Ic<Im).

In the case of an axial fan, the determination condition information shown in FIG. 15 is stored in the storage unit 155A. For example, the operating state determination unit 153A compares the current value (Ic) and the current threshold value (Im) when the rotation speed of the blower 110A is the same condition, and determines that the current value (Ic) is equal to or higher than the current threshold value (Im) ( If Ic≧Im), it is determined that the operating state of the ventilation device 40 is ON. On the other hand, when the current value (Ic) is less than the current threshold value (Im) (Ic<Im), the operating state determination unit 153A determines that the operating state of the ventilator 40 is OFF.

The output control unit 154A outputs information based on the operating state of the ventilation device 40 determined by the operating state determining unit 153A to the remote controller 30. Further, the output control unit 154A may output information based on the operating state of the ventilation device 40 determined by the operating state determining unit 153A to the mobile terminal 70.

As explained above, the air conditioner 1 according to the present embodiment detects the current value (Ic) flowing through the blower 110A (winding of the fan motor 111). In addition, the air conditioner 1 stores judgment condition information (second information, see FIG. 14 or 15) based on the correlation between the rotation speed of the blower 110A and the current value (Ic) flowing through the blower 110A in the storage unit 155A. are doing. Then, the air conditioner 1 determines the operating state of the ventilation device 40 based on the detected current value (Ic) flowing through the blower 110A, the rotation speed of the blower 110A, and the determination condition information.

As a result, the air conditioner 1 utilizes the fact that the relationship between the current value flowing through the blower 110 and the rotational speed of the blower 110 changes depending on the load of the indoor unit 10 to provide ventilation to the air conditioner connected via the ventilation duct 6. The operating state of the device 40 can be easily determined.

Specifically, the determination condition information includes information on a current threshold value (Im) indicating a threshold value of a current value with respect to the rotation speed of the blower 110A. The air conditioner 1 determines the operating state of the ventilation device 40 based on the result of comparing the detected current value (Ic) and the current threshold value (Im) under the condition that the rotation speed of the blower 110A is the same.

Note that the program for realizing the functions of the air conditioning control unit 150 (150A) is recorded on a computer-readable recording medium, and the program recorded on the recording medium is read into a computer system and executed, thereby controlling the air conditioning. The processing of section 150 (150A) may also be performed. Note that the "computer system" herein includes hardware such as an OS and peripheral devices.

Furthermore, the term "computer-readable recording medium" refers to portable media such as flexible disks, magneto-optical disks, ROMs, and CD-ROMs, and storage devices such as hard disks built into computer systems. Furthermore, a "computer-readable recording medium" refers to a storage medium that dynamically stores a program for a short period of time, such as a communication line when transmitting a program via a network such as the Internet or a communication line such as a telephone line. This includes things that retain programs for a certain period of time, such as volatile memory inside a computer system that serves as a server or client. Further, the above-mentioned program may be one for realizing a part of the above-mentioned functions, or may be one that can realize the above-mentioned functions in combination with a program already recorded in the computer system. Alternatively, the above program may be stored in a predetermined server, and the program may be distributed (downloaded, etc.) via a communication line in response to a request from another device.

Further, part or all of the functions of the air conditioning control unit 150 (150A) may be realized as an integrated circuit such as an LSI (Large Scale Integration). Each function may be implemented as an individual processor, or a part or all of them may be integrated into a processor. Further, the method of circuit integration is not limited to LSI, but may be implemented using a dedicated circuit or a general-purpose processor. Further, if an integrated circuit technology that replaces LSI emerges due to advances in semiconductor technology, an integrated circuit based on this technology may be used.

1 Air conditioner 2 Liquid extension pipe 3

Gas extension pipe

4,5 Signal line 6,7 Ventilation duct 7 Ventilation duct 11 Cabinet 12 Decorative panel 13 Inlet 14 Outlet 15 Ventilation duct hole 20 Outdoor unit 30 Remote control 31 Display section 40

Ventilation device

41, 42 Duct connection port 46 Ventilation fan 50

Remote control

110, 110A Blower 111

Fan motor

112, 113 Fan 120

Indoor heat exchanger

150, 150A Air conditioning control section 151 Voltage control section 151A Rotation speed indicator 152, Rotation

speed detection Section

153, 153A Operating

state determination section

154, 154A

Output control section

155, 155A Storage section 161 Rotor 162 Stator 166

Winding

200, 200A Fan

motor drive section

201, 201A Power IC
202, 202A control IC
203A Current detection unit 210 Magnetic sensor 450 Ventilator control unit

Claims

An air conditioner comprising an inlet that sucks air from an air-conditioned space, a blower, a heat exchanger, and an outlet that blows air into the air-conditioned space,
a ventilation duct hole for connecting via a duct to a ventilation device that is independently controlled by an operation system different from the operation system of the air conditioner;
The blower is controlled in accordance with the control by the operation system of the air conditioner, and in a state where the ventilation device is connected to the ventilation duct hole via the duct, the blower is controlled based on the control state of the blower. a control unit that determines the operating state of the ventilation system;
Air conditioner equipped with.
The control unit includes:
a voltage control unit that controls a voltage for driving the blower so that the rotation speed of the blower becomes a desired rotation speed;
a rotation speed detection section that detects the rotation speed of the blower driven by the voltage controlled by the voltage control section;
a storage unit storing first information based on a correlation between the rotation speed of the blower and the voltage;
an operating state determination unit that determines an operating state of the ventilation device based on the voltage controlled by the voltage control unit, the rotational speed of the blower detected by the rotational speed detection unit, and the first information;
The air conditioner according to claim 1, comprising:
The first information includes information on a voltage threshold indicating a threshold of the voltage with respect to the rotation speed of the blower,
The driving state determination section includes:
determining the operating state of the ventilator based on the result of comparing the voltage controlled by the voltage control unit and the voltage threshold under the condition that the rotation speed of the blower is the same;
The air conditioner according to claim 2.
The control unit includes:
a current detection unit that detects a current value flowing through the blower;
a storage unit storing second information based on a correlation between the rotation speed of the blower and the current value;
an operating state determining unit that determines an operating state of the ventilation device based on the current value detected by the current detecting unit, the rotation speed of the blower, and the second information;
The air conditioner according to claim 1, comprising:
The second information includes information on a current threshold value indicating a threshold value of the current value with respect to the rotation speed of the blower,
The driving state determination section includes:
Determining the operating state of the ventilation device based on the result of comparing the current value detected by the current detection unit and the current threshold value under the condition that the rotation speed of the blower is the same;
The air conditioner according to claim 4.
The operation system of the air conditioner includes a remote controller that commands and sets the operation of the air conditioner,
The control unit includes:
an output control unit that outputs information based on the determined operating state of the ventilation device to the remote controller;
The air conditioner according to any one of claims 1 to 5, comprising:
Equipped with a communication unit capable of communicating with a terminal device using wireless communication,
The control unit includes:
an output control unit that outputs information based on the determined operating state of the ventilation device to the terminal device via the communication unit;
The air conditioner according to any one of claims 1 to 5, comprising:
The output control section includes:
outputting, as information based on the operating state of the ventilation device, information that presents appropriate operation details to the user based on the operating state of the ventilation device;
The air conditioner according to claim 6 or 7.