TW202346765A - Air conditioning device and air conditioning system - Google Patents

Abstract

Provided are a device and a system with which it is possible to reliably prevent a current exceeding an upper limit, even when a power source of an optional apparatus is turned on while an air conditioner is operating in isolation. This air conditioning device comprises an indoor unit 10 and an outdoor unit 11, and includes an outdoor control circuit 36 which carries out control such that the maximum current of the outdoor unit 11 when the indoor unit 10 is connected to an optional apparatus 13 becomes lower than the maximum current of the outdoor unit 11 when the indoor unit 10 is not connected to the optional apparatus 13 or when initially configured.

Description

Air conditioning units and air conditioning systems

The present invention relates to air conditioning devices and air conditioning systems.

A technology is proposed to connect additional equipment (optional equipment) such as a humidifier to an air conditioning unit. In the case where an option device is connected to the air conditioning device, power needs to be supplied to the option device as well, so the current consumed by the system connecting the option device to the air conditioning device will increase.

Patent Document 1 describes a technology in which, in order to control the current consumed by the system to a rated value, the maximum current is reduced to a value lower than usual when the humidification operation of the humidification unit is started. [Prior technical literature] [Patent Document]

[Patent Document 1] Japanese Patent Application Publication No. 2002-089942

[Problem to be solved by the invention]

However, in the above-mentioned conventional technology, when the power of the optional device is turned on, there may be a problem that the upper limit of the current is exceeded. [Means used to solve problems]

In view of the above problems, the present invention provides an air conditioning device including an indoor unit and an outdoor unit, wherein: The air conditioning device includes control means that controls the maximum current of the outdoor unit when the optional equipment is connected to the indoor unit to be lower than the outdoor current when the optional equipment is not connected to the indoor unit or when it is initially set. The maximum current of the machine. [Effects of the invention]

According to the present invention, even when the power of the optional device is turned on, it is possible to reliably prevent the current from exceeding the upper limit.

FIG. 1 is a diagram showing a configuration example of an air conditioning system. The air conditioning system includes an indoor unit 10 installed indoors such as a house and an outdoor unit 11 installed outdoors. The air conditioning system is provided with an operating device (remote control) 12 in a room where the indoor unit 10 is installed, for wirelessly communicating with the indoor unit 10 and operating the indoor unit 10 . In addition to the indoor unit 10, the remote controller 12 may also have a function of operating an optional device 13 described later.

The indoor unit 10 and the outdoor unit 11 are connected by two pipes through which a refrigerant as a heat medium circulates. As the refrigerant, for example, hydrofluorocarbons such as R410a and R32 are used. In addition, the indoor unit 10 and the outdoor unit 11 are connected through a communication cable or the like in order to communicate with each other. In addition, the indoor unit 10 and the outdoor unit 11 are not limited to wired connection through communication cables, etc., but may also be connected wirelessly using Wi-Fi (registered trademark) or the like. Furthermore, when only one of the indoor unit 10 and the outdoor unit 11 has a socket for supplying commercial power, the socket and the indoor unit 10 can be connected through a power cable, for example, so that power can be supplied from the indoor unit 10 to the outdoor unit 11 . In addition, the invention is not limited to this. The socket and the outdoor unit 11 may also be connected through a power cable, and power may be supplied from the outdoor unit 11 to the indoor unit 10 .

The indoor unit 10 receives instructions from the remote controller 12 to start or stop. When the indoor unit 10 is started, it issues a start command to the outdoor unit 11 and notifies the set temperature set in the indoor unit 10 or the measured room temperature, etc. When the indoor unit 10 receives a change in operating conditions such as an operating mode or a set temperature from the remote controller 12, it also notifies the outdoor unit 11 of the changed operating conditions. When the indoor unit 10 is stopped, it issues a stop operation command to the outdoor unit 11 .

The indoor unit 10 sucks in indoor air during operation, performs heat exchange between the sucked air and the refrigerant supplied from the outdoor unit 11, blows out the cooled air or heated air, and cools or heats the room to a set temperature. .

The outdoor unit 11 is connected to the indoor unit 10 via pipes to circulate the refrigerant. The outdoor unit 11 compresses the refrigerant, exchanges heat between the refrigerant and outside air, adjusts the flow rate of the refrigerant, and supplies the refrigerant to the indoor unit 10 .

The air conditioning device can be additionally connected with optional equipment according to the user's choice. In the example shown in FIG. 1 , the optional device 13 is connected next to the indoor unit 10 . The optional device 13 is a device connected to add functions to the air conditioning device, and examples thereof include a ventilator, a humidifier, an air purifier, an aroma diffuser, and a remote adapter. A remote adapter is a relay device that relays communication between a communication terminal such as a smartphone or a tablet terminal and an air conditioner.

Here, "option" means that it can be installed according to a predetermined standard specification according to the buyer's choice, but also means that it can be installed later, or that the indoor unit 10 or the outdoor unit 11 is in a different form. For example, the ventilation device is sold in a set together with the indoor unit 10 or the outdoor unit 11 in a sales method in which the user cannot choose whether to install the ventilation device. Even in this case, when the ventilation device is in a different form from the indoor unit 10 or the outdoor unit 11 , the ventilation device is also set as the optional device 13 .

When the ventilation device is connected as the optional device 13, the indoor unit 10 that can receive the power supply from the outlet supplies power to the ventilation device, and the indoor unit 10 operates while maintaining the indoor temperature at the set temperature. While performing indoor ventilation. When the humidification device is connected as the optional device 13, the indoor unit 10 that can receive the power supply from the outlet supplies power to the ventilation device, and the indoor unit 10 operates while maintaining the indoor temperature at the set temperature. While maintaining the indoor humidity at a predetermined level. When the power plug of the outdoor unit is connected to the outlet, power can be supplied from the outdoor unit 11 to the optional device 13 .

FIG. 2 is a diagram showing a refrigerant circuit of the air conditioner. In FIG. 2 , the arrows indicated by solid lines indicate the flow of the refrigerant during the heating operation, and the arrows indicated by the dotted lines indicate the flow of the refrigerant during the cooling operation.

The indoor unit 10 includes a heat exchanger 20 and an indoor fan 21 as a blower. The heat exchanger 20 has a plurality of heat transfer tubes, and performs heat exchange between the refrigerant flowing in the plurality of heat transfer tubes and the indoor air flowing outside the plurality of heat transfer tubes. The indoor fan 21 is driven by a motor to suck indoor air into the casing of the indoor unit 10 and blows the air heat-exchanged by the heat exchanger 20 into the room.

The outdoor unit 11 includes a compressor 30, a heat exchanger 31, an outdoor fan 32 as a blower, an outdoor expansion valve 33, and a four-way valve 34. The compressor 30 is driven by the motor to compress the low-temperature and low-pressure refrigerant gas, and discharges the high-temperature and high-pressure refrigerant gas. The heat exchanger 31 performs heat exchange between the high-temperature and high-pressure refrigerant gas from the compressor 30 or the low-temperature and low-pressure liquid refrigerant from the indoor unit 10 and outside air. The outdoor fan 32 is driven by a motor to suck outside air into the casing of the outdoor unit 11 and blows the air heat-exchanged by the heat exchanger 31 to the outside.

The outdoor expansion valve 33 decompresses the refrigerant condensed from the heat exchanger 31 or the heat exchanger 20 of the indoor unit 10 to adjust the amount of refrigerant circulating in the system. The four-way valve 34 is a valve that switches the direction in which the refrigerant flows according to the operation mode of the air conditioner.

When the operation mode of the air conditioner is set to the heating operation mode by the remote controller 12, the refrigerant flows in the direction of the arrow indicated by the solid line through switching of the four-way valve 34. The high-temperature and high-pressure refrigerant gas compressed by the compressor 30 is supplied to the indoor unit 10 via the four-way valve 34 .

In the indoor unit 10, heat is exchanged between high-temperature and high-pressure refrigerant gas and indoor air through the heat exchanger 20, and is condensed into high-pressure liquid refrigerant. The indoor unit 10 returns high-pressure liquid refrigerant to the outdoor unit 11 .

The high-pressure liquid refrigerant returned to the outdoor unit 11 is decompressed by the outdoor expansion valve 33 . The decompressed refrigerant is liquid refrigerant or a part of it is vaporized, becomes a two-phase flow in which liquid and gas are mixed together, and is sent to the heat exchanger 31 . In the heat exchanger 31, heat is exchanged between the refrigerant and the outside air, and the refrigerant is vaporized and turned into a low-pressure, low-temperature refrigerant gas. The low-temperature and low-pressure refrigerant gas is supplied to the compressor 30 via the four-way valve 34 .

When the operation mode of the air conditioner is set to the cooling room operation mode by the remote controller 12, the refrigerant flows in the direction of the arrow shown by the dotted line through the switching of the four-way valve 34. The high-temperature and high-pressure refrigerant gas compressed by the compressor 30 is supplied to the heat exchanger 31 via the four-way valve 34 .

In the heat exchanger 31, heat is exchanged between the refrigerant and the outside air, and the refrigerant is condensed into a high-pressure liquid refrigerant. The liquid refrigerant is decompressed by the outdoor expansion valve (33). The decompressed refrigerant becomes a liquid refrigerant or a two-phase flow of liquid and gas, and is supplied to the indoor unit 10 .

In the indoor unit 10 , heat is exchanged between the liquid refrigerant or the two-phase flow refrigerant and the indoor air through the heat exchanger 20 , and the liquid refrigerant is evaporated and becomes a low-pressure refrigerant gas. The indoor unit 10 supplies low-pressure refrigerant gas to the outdoor unit 11 .

The low-pressure refrigerant gas returned to the outdoor unit 11 returns to the compressor 30 via the four-way valve 34 .

FIG. 3 is an external view showing a ventilation device as an example of optional equipment. The ventilation device 40 is substantially flat so that its back surface can be disposed adjacent to an indoor wall, and its side surfaces have the same shape and substantially the same size as the side surfaces of the indoor unit 10 . Therefore, the ventilation device 40 can be arranged adjacent to one side surface of the indoor unit 10 .

FIG. 4 is an external view showing a case where the ventilation device 40 is arranged adjacent to one side surface of the indoor unit 10 . FIG. 4(a) is a perspective view of the indoor unit 10 and the ventilation device 40 viewed from above, and FIG. 4(b) is a perspective view of the indoor unit 10 and the ventilation device 40 viewed from below.

The indoor unit 10 has an inlet 22 on the upper surface for sucking indoor air. The indoor unit 10 has a blower outlet for blowing out the heat-exchanged air on the lower side of the front surface. The air outlet is provided with a louver 23 as a plurality of blades. By changing the angle of the louver 23, the flow rate of the blown air is adjusted.

In the indoor unit 10, an indoor fan 21 is disposed in the center of the casing, and the heat exchanger 20 is disposed to surround the upper side of the indoor fan 21. Therefore, the indoor air is sucked into the casing from the suction port 22 through the heat exchanger 20 through the rotation of the indoor fan 21, and the flow rate of the heat-exchanged air is adjusted by the louver 23, and is blown out from the blower outlet.

FIG. 5 is a diagram showing a configuration example of the indoor unit 10 , the outdoor unit 11 , and the optional equipment 13 . The indoor unit 10 includes an indoor terminal block 24, an indoor control circuit 25, an indoor display unit 26, and a power plug 27 in addition to the heat exchanger 20, the indoor fan 21, the suction port 22, and the louver 23 shown in FIG. 2 . In FIG. 5 , only the indoor terminal block 24 , the indoor control circuit 25 , the indoor display unit 26 , and the power plug 27 are shown as examples.

The indoor control circuit 25 includes a relay 50 , a noise filter (NF) 51 , a rectifier circuit (CNV) 52 , a switching (SW) power supply 53 , a communication circuit 54 , and a home automation (HA) terminal 55 .

The relay 50 is controlled in such a way that when the air conditioning operation or the ventilation operation is stopped, the power supply to the outdoor unit 11 or the ventilation device 40 is stopped, and when the air conditioning operation or the ventilation operation is started, the power supply to the outdoor unit 11 or the ventilation device 40 is started. Power supply to the ventilation device 40. NF 51 eliminates unnecessary noise generated on cables, etc. CNV 52 converts AC current into DC current. The SW power supply 53 is a power supply device that controls the ratio (DUTY ratio) of the ON time to the OFF time of the semiconductor switching element and stabilizes the output.

The communication circuit 54 communicates with the outdoor unit 11 via the indoor terminal block 24 . In the communication between the indoor unit 10 and the outdoor unit 11, information such as instructions received from the remote controller 12 is transmitted and received. The information transmitted and received is information related to air conditioning control such as an instruction to start the operation of the outdoor unit 11, an instruction to stop the operation of the outdoor unit 11, an instruction to change the temperature setting, and the like.

The home automation terminal 55 is connected to the HA terminal 76 provided in the ventilation device 40 through a cable, thereby enabling communication between the indoor unit 10 and the ventilation device 40 . In the communication between the indoor unit 10 and the ventilation device 40, information such as instructions received from the remote controller 12 is transmitted and received. The information transmitted and received is information related to ventilation control, such as an instruction to start the operation of the ventilation device 40 and an instruction to stop the operation of the ventilation device 40 .

The indoor display unit 26 displays the operation or stop state of the indoor unit 10 . The power plug 27 is connected to an outlet installed indoors and supplies commercial power to the indoor unit 10 .

The outdoor unit 11 includes an outdoor terminal block 35 and an outdoor control circuit 36 in addition to the compressor 30 , the heat exchanger 31 , the outdoor fan 32 , the outdoor expansion valve 33 , and the four-way valve 34 shown in FIG. 2 . In FIG. 5 , only the outdoor terminal block 35 and the outdoor control circuit 36 are shown as examples.

The outdoor control circuit 36 includes an NF 60 , a CNV 61 , a SW power supply 62 , and a communication circuit 63 . The NF 60, CNV 61, and SW power supply 62 have the same functions as the NF 51, CNV 52, and SW power supply 53 of the indoor unit 10, so description thereof is omitted here. The communication circuit 63 communicates with the indoor unit 10 via the outdoor terminal block 35 .

The ventilation device 40 includes a first terminal block 41 , a second terminal block 42 , a ventilation control circuit 43 , a display unit 44 , SW 45 , a ventilation fan 46 , and a stepping (ST) motor 47 .

The first terminal block 41 is connected to the indoor terminal block 24 of the indoor unit 10 and two power cables through a communication cable. The second terminal block 42 is connected to the outdoor terminal block 35 of the outdoor unit 11 and two power cables through a communication cable.

The ventilation control circuit 43 includes an NF 70, a CNV 71, a SW power supply 72, a field effect transistor (FET) 73, an MPU (Micro Processing Unit) 74, a photo-coupler 75, and an HA terminal. 76. The NF 70, CNV 71, and SW power supply 72 have the same functions as the NF 51, CNV 52, and SW power supply 53 of the indoor unit 10. The HA terminal 76 has already been described, so the description is omitted here.

The FET 73 controls the current supplied from the SW power supply 72 to the ventilation fan 46 and the like under the MPU 74 . The MPU 74 receives power supply from the SW power supply 72 and operates, and controls communication with the indoor unit 10, the number of revolutions of the ST motor 47, and the like. The optical coupler 75 converts the optical signal sent from the indoor unit 10 into an electrical signal.

The display unit 44 is composed of an LED (light emitting diode) or the like, and displays the status of the ventilation device 40 . SW 45 switches the ST motor 47 on and off under the MPU 74 . The ventilation fan 46 is rotated by the ST motor 47 to exchange indoor air and outside air.

FIG. 6 is a diagram showing a connection example of the indoor unit 10 , the outdoor unit 11 and the ventilation device 40 . The power plug 27 provided in the indoor unit 10 is connected to an outlet installed indoors. Commercial power supplied from the socket can be supplied to the indoor unit 10 via the power plug 27 and the power cable, and then supplied to the outdoor unit 11 or the ventilation device 40 via the relay 50 of the indoor unit 10 . Therefore, even if there is only one outlet near the installation place of the air conditioner, power can be supplied to the outdoor unit 11 or the optional device 13 via the power plug 27 of the indoor unit 10 .

FIG. 6(a) shows a connection example in which power is supplied from the indoor unit 10 to the outdoor unit 11 via the ventilation device 40, and FIG. 6(b) shows a connection example in which power is supplied from the indoor unit 10 to the outdoor unit 11 and the ventilation device 40. Example of connection using separate power supplies. In addition, these connection examples are only examples. A power plug may be provided on the outdoor unit 11 and the power supplied to the outdoor unit 11 may be connected to the indoor unit 10 and the ventilation device 40 respectively. Alternatively, the ventilation device 40 may be connected via the indoor unit 10 . The air supply device 40 is connected to the indoor unit 10 via the ventilation device 40 .

When the power plug 27 of the indoor unit 10 is inserted into an outlet, and the indoor unit 10 receives commercial power and supplies the power to the outdoor unit 11, when the power of the air conditioner is turned on, the operation of the air conditioner starts.

Each outlet has a power limit, and the air conditioner needs to prevent current that exceeds the power limit from flowing to the outlet. In an air conditioner to which optional equipment can be connected, if the maximum current value is set to a value close to the upper limit current of the outlet while the optional equipment is not connected, there will be electrical power exceeding the upper limit of power due to the connection of the optional equipment. Possibility of flow to socket.

On the contrary, if the maximum current value for connecting optional equipment is predetermined, the maximum current value used will be reduced even when the optional equipment is not connected, thereby inhibiting the capability.

Therefore, this structure is adopted: it is recognized that the optional device is connected, and when the optional device is connected, control is performed by reducing the upper limit of the current to reduce the maximum current value.

In the air conditioning apparatus, most of the current is consumed by the compressor 30 of the outdoor unit 11. The current supplied to the compressor 30 depends on the number of revolutions of the compressor 30 .

FIG. 7 is a diagram showing the relationship between the current consumed by the outdoor unit 11 and the number of revolutions of the compressor 30 . FIG. 7(a) is a graph when the optional device 13 of the indoor unit 10 is not connected (when it is not connected). The current used by the outdoor unit 11 increases as the rotational speed of the compressor 30 increases. The air conditioning device sets the upper limit of the rotation speed of the compressor 30 to a predetermined rotation speed and sets the current limit value to, for example, 19 A.

When the optional device 13 is connected to the indoor unit 10, as shown in FIG. 7(b), by lowering the upper limit of the rotation speed of the compressor 30, the current limit value is lowered to, for example, 18.5 A. Here, let the maximum current consumed by the optional device 13 be 0.5A, subtract 0.5A from the limit value of the optional device 13 when it is not connected, 19A, and set the limit value of the optional device 13 when it is connected to 18.5A. . In addition, FIG. 7(c) shows a graph comparing the graph shown in FIG. 7(a) and the graph shown in FIG. 7(b).

In this way, when the optional device 13 is connected, by limiting the maximum current in advance, it is possible to reliably prevent the maximum current from exceeding.

The difference (limiting width) between the maximum current when the optional device 13 is connected and when it is not connected is sufficient as long as it is greater than the maximum current consumed by the optional device 13. The limit width does not necessarily need to be equal to that of the optional device 13. The maximum current consumed. In order to ensure safety, it is better to make the limiting amplitude larger than the maximum current consumed by the optional machine 13.

On the other hand, when the total value of the maximum power consumption of the indoor unit 10 and the maximum power consumption of the outdoor unit 11 is lower than the upper limit current of the socket supplying the commercial power supply, it can also be within a range that does not exceed the upper limit current of the socket. Set the limit width to a value smaller than the maximum current consumed by the optional device 13.

Furthermore, the maximum current consumed by the optional device 13 is different depending on the type of the optional device 13 . Therefore, the limit width can be changed according to the type of the optional device 13 based on the model code of the optional device 13 or the like.

In the outdoor unit 11, in addition to the compressor 30, there is an outdoor fan 32 as a device that consumes electric current. When the optional device 13 is not connected, since the current limit value of the outdoor unit 11 is high, the upper limit value of the rotation speed of the compressor 30 is high. When the compressor 30 is operated at a high rotation speed, the circulation amount of the refrigerant is large, and the outdoor fan 32 also needs to be operated at a high rotation speed.

When the optional device 13 is connected, by lowering the upper limit of the rotation speed of the compressor 30, the circulation amount of the refrigerant will be reduced, and the rotation speed of the outdoor fan 32 can be reduced. Therefore, there is no need to rotate the outdoor fan 32 at a high number of revolutions.

Machines powered by motors such as the compressor 30 are configured to stop operating in order to protect the motor when the operating current exceeds the rated value. The current value at which the machine stops is the stop threshold. According to the stop threshold, it is possible to prevent the current from exceeding the limit value and prevent overcurrent from flowing to the electronic components and causing damage to the electronic components. The stop threshold value of the current that stops the compressor 30 is a threshold value for the purpose of protecting electronic components. Therefore, the stop threshold value does not change when the optional device 13 of the indoor unit 10 is connected or disconnected. Only the outdoor unit 11 changes. current limit value.

The number of revolutions of the compressor 30 is the number of revolutions (speed) of the motor per unit time, and the change in the number of revolutions is acceleration. A sudden change in the number of revolutions will lead to the upper limit of the number of revolutions. Even if the vehicle is stopped in an emergency near the upper limit, it may overrun and exceed the upper limit.

Therefore, it is also possible to set an acceleration threshold value that limits the change in the rotational speed of the compressor 30 , that is, the acceleration.

Since the current limit value is controlled to be lower when the optional device 13 is connected than when it is not connected, the upper limit value of the current becomes lower when the optional device 13 is connected, so that the upper limit value is easily reached. Therefore, the acceleration threshold value changes between the time when the option device 13 is connected and the time when it is not connected, and the acceleration threshold value can be lowered when the optional device 13 is connected than when it is not connected.

FIG. 8 is a flowchart showing the flow of control for limiting the maximum current of the outdoor unit 11. The remote control 12 is a button pressed by the user to start the operation of the air conditioner, and instructs the indoor unit 10 to start the operation. In the indoor unit 10, upon receiving an operation start instruction from the remote controller 12, the indoor control circuit 25 starts control of the indoor unit 10 and instructs the outdoor unit 11 to start the operation. The outdoor unit 11 receives an instruction from the indoor unit 10 to start the operation, and the outdoor control circuit 36 starts the control of the outdoor unit 11 from step 100 .

In step 101, the indoor control circuit 25 determines whether the optional device 13 is connected to the indoor unit 10. Whether the optional device 13 is connected to the indoor unit 10 can be inquired through the indoor control circuit 25 and whether there is a response. Furthermore, it can be determined by whether current is supplied from the indoor unit 10 and current is returned from the optional device 13 . In other words, when the optional device 13 is connected, the optional device 13 can return a response through the MPU or the like because the current supplied from the indoor unit 10 is changed and used, and the converted current is returned.

Whether the optional device 13 is connected to the indoor unit 10 can be set to indicate that the optional device 13 is connected when the optional device 13 is connected, or it can be judged by the presence or absence of this setting. In addition, these methods are examples, and the method of determining whether or not the optional device 13 is connected is not limited to these methods. If electricity is supplied to the optional device 13, it can be determined whether the optional device 13 is connected. Therefore, for example, a method of determination may be considered when air conditioning operation is started or when independent operation of the optional device 13 is started.

Here, when there is no response from the optional device 13 in a state where the optional device 13 is connected, the setting value is not switched from the connection to the non-connection of the optional device 13, and the indoor unit 10 is An error is displayed on the display unit 26 or the display unit 44 of the optional device 13 . Since there is a possibility that the optional device 13 fails and there is no response from the optional device 13, the error display can prevent continued operation in a state where the optional device 13 fails. The error can be displayed on the remote controller 12 for operating the indoor unit 10 or the remote controller 12 of the optional device 13 . These remote controllers 12 also include operating devices that communicate via the Internet.

On the other hand, there is a possibility that there is no response from the optional device 13 because the optional device 13 is removed. Therefore, the error display can be canceled by operating the remote controller 12 or the remote controller 12 for operating the optional device 13, and the setting value can be switched from the connection to the optional device 13 to the non-connection.

If it is determined in step 101 that the optional device 13 is connected, the process proceeds to step 102, and the outdoor control circuit 36 receives a notification from the indoor control circuit 25 that the optional device 13 is connected, thereby limiting the maximum current of the outdoor unit 11. value. The maximum current value of the outdoor unit 11 can be limited by lowering the upper limit of the rotation speed of the compressor 30 included in the outdoor unit 11 . Specifically, the upper limit value is lowered from, for example, 19A to 18.5A. The maximum current value can be reduced as shown in the optional machine 13.

If it is determined in step 101 that the optional device 13 is not connected, or after the maximum current value of the outdoor unit 11 is limited in step 102, the process proceeds to step 103 to end this control.

Furthermore, the indoor unit 10 may retain the limit information of the maximum current value and send a signal to the outdoor unit 11 at the start of each operation, or the outdoor unit 11 may retain the limit information of the maximum current value.

Up to now, the air-conditioning device and the air-conditioning system of the present invention have been described in detail using the above-mentioned embodiments. However, the present invention is not limited to the above-mentioned embodiments, and may be implemented in other embodiments or additions, changes, deletions, etc. in this field. Modifications can be made within the scope that a person of ordinary skill can think of, and as long as the functions and effects of the present invention are achieved in any aspect, they are included in the scope of the present invention.

In the above embodiment, description is made on the premise that the maximum current of the outdoor unit 11 returns to 19A when the optional device 13 is switched from connection to non-connection. However, the maximum current may not return to 19A. Furthermore, as mentioned above, after detecting the switching from connection to non-connection of the optional device 13, the process may be returned to 19A by operating the remote controller 12 or the optional device 13. Instead of using the time when the optional device 13 is not connected to the indoor unit 10 as the reference, the value at the time of initial setting of the outdoor unit 11 may be used as the reference. For example, when the maximum current consumed by the optional device 13 is set to 0.5A, 0.5A can be subtracted from the limit value 19A of the outdoor unit 11 at the time of initial setting, and the value when the optional device 13 is connected can be reduced. The limit value is set to 18.5A. The value at the time of initial setting is a value set at the time of manufacture or initial installation of the air-conditioning apparatus, for example.

10: Indoor unit 11:Outdoor unit 12:Remote control 13: Optional machine 20:Heat exchanger 21:Indoor fan 22:Suction port 23:Louvres 24:Indoor terminal block 25: Indoor control circuit 26:Indoor display department 27:Power plug 30:Compressor 31:Heat exchanger 32:Outdoor fan 33: Outdoor expansion valve 34:Four-way valve 35:Outdoor terminal block 36: Outdoor control circuit 40: Ventilation device 41: First terminal block 42: Second terminal block 43: Ventilation control circuit 44:Display part 45:SW 46:Ventilation fan 47:ST motor 50:Relay 51:NF 52:CNV 53:SW power supply 54: Communication circuit 55:HA terminal 60:NF 61:CNV 62:SW power supply 63: Communication circuit 70:NF 71:CNV 72:SW power supply 73:FET 74:MPU 75: Optocoupler 76:HA terminal

[Fig. 1] is a diagram showing a configuration example of an air conditioning system. [Fig. 2] is a diagram showing the refrigerant circuit of the air conditioner. [Fig. 3] is an external view showing a ventilator as an example of optional equipment. [Figure 4] is an external view showing the optional equipment connected to the indoor unit. [Fig. 5] is a diagram showing a configuration example of an indoor unit, an outdoor unit, and optional equipment. [Fig. 6] is a diagram showing an example of connecting the power cables of the indoor unit, outdoor unit, and optional equipment. [Fig. 7] is a graph showing the relationship between the maximum current of the outdoor unit and the rotational speed of the compressor. [Fig. 8] is a flowchart showing the flow of control for limiting the maximum current of the outdoor unit.

10: Indoor unit

11:Outdoor unit

24:Indoor terminal block

25: Indoor control circuit

26:Indoor display department

27:Power plug

35:Outdoor terminal block

36: Outdoor control circuit

40: Ventilation device

41: First terminal block

42: Second terminal block

44:Display part

45:SW

46:Ventilation fan

47:ST motor

50:Relay

51:NF

52:CNV

53:SW power supply

54: Communication circuit

55:HA terminal

60:NF

61:CNV

62:SW power supply

63: Communication circuit

70:NF

71:CNV

72:SW power supply

73:FET

74:MPU

75: Optocoupler

76:HA terminal

Claims (16)

An air conditioning device is provided with an indoor unit and an outdoor unit, and only the aforementioned indoor unit or the aforementioned outdoor unit is connected to a socket, wherein: The aforementioned air-conditioning device includes a control component that is controlled in such a manner that when the optional device is connected to the air-conditioning device, the total maximum current of the air-conditioning device and the optional device does not exceed the upper limit current of the socket, the air-conditioning device is connected to the optional device. The maximum current of the outdoor unit when the air-conditioning device is connected to the optional device is lower than the maximum current of the outdoor unit when the optional device is not connected to the air-conditioning device or during initial setting. The air conditioning device according to claim 1, wherein the outdoor unit has a compressor; The control component controls the maximum rotation speed of the compressor when the optional device is connected to be lower than the maximum rotation speed of the compressor when the optional device is not connected or initially set. The air conditioning device according to claim 2, wherein the aforementioned outdoor unit has an outdoor fan; The control component controls the maximum rotation speed of the outdoor fan when the optional device is connected to be lower than the maximum rotation speed of the outdoor fan when the optional device is not connected or initially set. The air conditioning device according to claim 1, wherein the outdoor unit has a compressor; The aforementioned control component is controlled in such a manner that the stop threshold value for stopping the current of the compressor is equal when the aforementioned optional equipment is connected and when the aforementioned optional equipment is not connected or initialized, and the stop threshold value is equalized when the aforementioned optional equipment is connected. The upper limit value of the current that reduces the rotational speed of the compressor when the optional equipment is connected is lower than the upper limit value of the current that reduces the rotational speed of the compressor when the optional equipment is disconnected or initialized. The air conditioning device according to claim 4, wherein the control component is controlled in such a manner that the acceleration threshold of the limiting current as the acceleration of the change in rotation number of the compressor when the optional equipment is connected is lower than The acceleration threshold that limits the current of the acceleration of the compressor when the optional equipment is disconnected or initially set. The air conditioning device according to claim 1, wherein the difference between the maximum current of the outdoor unit when the optional equipment is not connected or when initially set and the maximum current of the outdoor unit when the optional equipment is connected, It is above the maximum current consumed by the optional machine mentioned above. The air conditioning device according to claim 6, wherein the difference between the maximum current of the outdoor unit when the optional equipment is not connected or when initially set and the maximum current of the outdoor unit when the optional equipment is connected, It is larger than the maximum current consumed by the optional machine mentioned above. The air conditioning device as claimed in claim 1 is provided with a remote control, which is at least used to operate the aforementioned indoor unit; When switching from a state in which the air-conditioning apparatus is connected to the optional equipment to a state in which the air-conditioning apparatus is not connected to the optional equipment, an error is displayed on the display unit of the indoor unit or the remote controller. The air conditioning device according to claim 1, wherein the air conditioner is maintained connected to the air conditioner even if the air conditioner is switched from a state in which the optional device is connected to a state in which the optional device is not connected to the air conditioner. The maximum current value of the aforementioned outdoor unit when the device is connected to the aforementioned optional equipment. The air conditioning device according to claim 9 is provided with a remote control, which is at least used to operate the aforementioned indoor unit; When a predetermined operation is performed on the remote control, the maximum current of the outdoor unit is restored to the initial setting value. The air conditioning device according to claim 1, wherein the indoor unit is connected to a commercial power supply; When the optional device is connected to the air conditioning device, the outdoor unit receives a supply of electric current from the indoor unit via the optional device. The air conditioning device according to claim 1, wherein the indoor unit is connected to a commercial power supply; When the optional device is connected to the air conditioning device, the outdoor unit receives supply of electric current from the indoor unit and the optional device respectively. An air conditioning system includes an air conditioning device and an optional machine. The air conditioning device has an indoor unit and an outdoor unit. Only the indoor unit or the outdoor unit is connected to a socket, and the optional machine is electrically connected to the indoor unit or the outdoor unit. in: The aforementioned air conditioning devices include: A control means that controls the connection to the air-conditioning device in such a manner that the total maximum current of the air-conditioning device and the optional device when the optional device is connected to the air-conditioning device does not exceed the upper limit current of the socket. The maximum current of the outdoor unit when the optional equipment is installed is lower than the maximum current of the outdoor unit when the optional equipment is not connected to the air conditioning device or when it is initially set. The air conditioning system as described in claim 13 is provided with a remote control, which is at least used to operate the aforementioned indoor unit or the aforementioned optional equipment; Among them, even if the state where the optional equipment is connected to the air-conditioning apparatus is switched to a state where the optional equipment is not connected to the air-conditioning apparatus, the outdoor position when the optional equipment is connected to the air-conditioning apparatus is maintained. The value of the maximum current of the machine; When a predetermined operation is performed on the remote control, the maximum current of the outdoor unit is restored to the initial setting value. The air conditioning system as described in claim 13 is provided with a remote control, which is at least used to operate the aforementioned indoor unit or the aforementioned optional equipment; Wherein, when switching from a state in which the air-conditioning device is connected to the optional device to a state in which the air-conditioning device is not connected to the optional device, the display unit of the indoor unit or the display unit of the optional device or the remote control An error is displayed. An air conditioning device is provided with an indoor unit and an outdoor unit, and only the aforementioned indoor unit or the aforementioned outdoor unit is connected to a socket, wherein: The air-conditioning device includes a control component that controls the air-conditioning device in such a way that the total maximum current of the air-conditioning device and the ventilating device does not exceed the upper limit current of the socket when the ventilation device is connected to the air-conditioning device. The maximum current of the outdoor unit when the air conditioning device is connected to the ventilation device is lower than the maximum current of the outdoor unit when the ventilation device is not connected to the air conditioning device or during initial setting.

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