JP2005180770A - Automatic heating/cooling switching system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an automatic heating/cooling switching system in which a plurality of pieces of indoor equipment connected to the outdoor equipment of one refrigerant system can be automatically switched between heating and cooling. <P>SOLUTION: An air-conditioning system, in which a predetermined piece of outdoor equipment 100a and a plurality of pieces of indoor equipment 110a, 110b, ..., 110e are connected together by a refrigerant pipe, includes temperature controlling means 214, 243 that detect and control the ambient temperature of each piece of indoor equipment; a control means 212 that determines the operational mode of the air-conditioning system by integrating the operating conditions of the pieces of indoor equipment that correspond to differences between the ambient temperatures and the set temperatures of the pieces of indoor equipment; and an operational mode switch means 216 that switches all the pieces of indoor equipment to heating or cooling operation according to the determination. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an air conditioning automatic switching system in an air conditioner.

  In general, in an air conditioner installed in a building, a plurality of indoor units are connected to one outdoor unit. However, when only one system is provided with the refrigerant pipe connecting the outdoor unit and each indoor unit, if any one of the indoor units is in the heating operation, the other indoor units in the same system are in the cooling operation. However, since the outdoor unit is in a heating operation, it cannot be switched to a cooling operation, and therefore, a part of the indoor unit cannot be heated and at the same time, another part of the indoor unit cannot be cooled. .

  As a measure for solving this problem, each of the indoor units connected to one outdoor unit by installing two cooling system refrigerant pipes for cooling and heating between one outdoor unit and a plurality of indoor units. In each of the above, an air conditioner that can be operated by arbitrarily selecting cooling or heating is embodied.

  As another solution, one of a plurality of indoor units is represented as a master unit, and the master unit is set to cooling or heating operation based on a temperature sensor of the master unit, and connected to the same outdoor unit. Other indoor units are collectively operated in the same operation mode as the main unit, that is, if the main unit is in cooling operation, other indoor units are also in cooling operation, and if the main unit is in heating operation, other indoor units are also in heating operation. Has been proposed. (For example, refer to Patent Document 1).

Japanese Patent Laid-Open No. 7-12393 (paragraphs 0010-0025, FIG. 1)

  Of the conventional automatic cooling / heating switching systems in an air-conditioning apparatus, a system in which two refrigerant pipes are installed is one outdoor unit that can simultaneously perform cooling / heating, two refrigerant pipes, a cooling refrigerant system, and a heating system. Although it is embodied as an air conditioner composed of a branching device that switches between the refrigerant systems, an air conditioner that can simultaneously use cooling and heating costs less than an air conditioner of one refrigerant system that can use only one of the cooling and heating systems. In addition to installing two systems of refrigerant pipes, it is necessary to install a branching apparatus for the refrigerant pipes, resulting in a problem that the apparatus price and construction cost increase.

  However, in order to reduce the price, when an outdoor unit of one refrigerant system that can use only one of the cooling and heating systems is used, it is impossible to perform cooling and heating at the same time. When it was, other indoor units could not be forced to switch to cooling operation, which had an impact on comfort. In order to switch this device to cooling operation, it is necessary to find an indoor unit that is connected to the same outdoor unit and is performing heating operation, and operate the remote controller to stop the indoor unit that is heating or switch to cooling However, in general, users of air conditioners often do not know which indoor unit is connected to which outdoor unit, and therefore it is difficult to determine which indoor unit should be stopped. Met.

  Further, in the air conditioner disclosed in Patent Literature 1, since a specific indoor unit is represented as a parent unit, the comfort of the entire room may be impaired depending on the installation location of the parent unit. For example, when the base unit is installed by the window, the temperature at the window rises on a hot day, so that even when the center of the room is cold, the air conditioner may be switched to cooling. Also, on cold days, the temperature at the window drops, so even if the center of the room is hot, it may be switched to heating.

  Furthermore, when the base unit is installed in the center of the room, the window may become hot or cold for the same reason. In addition, since each indoor unit is equipped with a means for setting the master unit and slave units (indoor units other than the master unit), if you want to change the settings of the master unit and slave units after operating the air conditioner, There was a problem that it was necessary to climb the back of the ceiling where the indoor unit was installed and to reset the master unit and slave unit.

  The present invention was made to solve the above-described problems, and provides an automatic cooling / heating switching system that enables automatic switching between heating and cooling by using a low-cost one-refrigerant cooling / heating switching air conditioner. It is for the purpose.

  In the air conditioning system in which a predetermined outdoor unit and a plurality of indoor units are connected by a single refrigerant pipe, the air conditioning / automatic switching system according to the present invention detects and manages the ambient temperature of each indoor unit. Means, a management means for determining the operation mode of the air conditioning system by comprehensively operating the operation state of each indoor unit corresponding to the difference between the ambient temperature of each indoor unit and the set temperature of each indoor unit, and the above based on the determination Operation mode switching means for switching each indoor unit to cooling or heating operation collectively is provided.

  Since the air conditioning automatic switching system according to the present invention is configured as described above, the user can enter the indoor environment without using the remote controller to perform switching operation while using an inexpensive air conditioner that can use only the same operation mode. In addition, it is possible to automatically switch between cooling and heating, and a comfortable air-conditioning environment can be provided to the user.

Embodiment 1 FIG.
Embodiment 1 of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the configuration of the cooling / heating automatic switching system according to the first embodiment.
As shown in FIG. 1, this automatic cooling / heating switching system includes an outdoor unit 100a, 100b,... Of an air conditioner installed in a facility having one or more buildings, and one refrigerant pipe for a predetermined outdoor unit, for example, 100a. 110e connected to each other by the communication line 11 and constituting a group, and a user in the facility provided for each indoor unit can operate the corresponding indoor unit. And a remote controller 120a, 120b ... 120e for displaying the operating state of the indoor unit, and a plurality of units that are connected to another predetermined outdoor unit 100b by one system refrigerant pipe and communication line 11 and constitute another group 110f..., And these indoor units are provided corresponding to the indoor units 110f... Configured in the same manner as the remote controllers 120a, 120b... 120e so that the corresponding indoor units can be operated. Each outdoor unit supplies a cooling or heating refrigerant generated by a compressor (not shown) through a refrigerant pipe based on a request from each indoor unit in the group. ing.

  In addition, in order to monitor and control a group of air conditioners composed of the above-described outdoor unit and a plurality of indoor units, the air conditioners are connected to each other by a dedicated communication line or a general-purpose communication line 10 such as a LAN. An air conditioning management device 200 is provided so that an operation control signal can be transmitted from the air conditioning management device 200 to each air conditioning device, and a signal for notifying the air conditioning management device 200 of its own operating state can be transmitted from each air conditioning device. It has become. The detailed configuration of the air conditioning management device 200 will be described later.

  In addition, a management device 300 is provided as an operation terminal for the facility manager to perform various settings such as monitoring and operation of the air conditioner, monitoring of various histories such as abnormality and operation time, and schedule, and a general-purpose communication line such as a LAN. 20 is connected to the air conditioning management apparatus 200 via That is, monitoring and various settings are performed via the air conditioning management device 200.

  The air conditioning management device 200 includes an interface 260 for connecting to the outdoor units 100a, 100b,... Constituting each group of the air conditioning devices, an interface 270 for connecting to the management device 300, and a central processing unit of a computer. Correspondingly, it has a control unit 210 that executes control processing of each air conditioner and a plurality of monitoring screens corresponding to each air conditioner, and displays the control processing and operation state of each air conditioner under the control of the control unit 210 A display device 220 to be operated and a user interface operated by a user of the facility, and an input device 230 for supplying a control screen 210 with a command for switching a monitoring screen of the display device 220 and operating the air conditioner according to a user input. Storage of the connection between the outdoor unit of the air conditioner and the indoor unit, the operating state of the air conditioner, temperature information An air conditioning information storage unit 240, a predetermined outdoor unit of the air conditioner, a switching information storage unit 250 for setting and storing a switching block of indoor units connected to the outdoor unit and a priority of the indoor unit to be described later, etc. It has.

  The control unit 210 responds to a request content analysis unit 211 that analyzes whether the command requested from the management device 300 is a request for monitoring the operating state of the air conditioner or an operation request for the air conditioner, and the analysis result of the request content analysis unit 211 The air conditioning management unit 212 generates a control signal and responds necessary information and operation content to the management device 300. The air conditioning management unit 212 further includes an air conditioner operating state management unit 213 and a temperature management unit 214. And a compressor state management unit 215 and an operation mode switching management unit 216.

  The input device 230 has an operation button for operating the air conditioner. When the operation button for switching the monitor screen is pressed, a command for switching the monitor screen is supplied to the control unit 210, and the screen of the air conditioner to be operated is displayed. For example, ON / OFF distinction, set temperature, air conditioning distinction, wind power, and the like are displayed on the display device 220. When an operation button for operating state operation is pressed, an operation control command for the air conditioner is supplied to the control unit 210. Thus, the operating state of the air conditioner to be operated can be controlled.

  The air conditioning information storage unit 240 stores connection information 241 and air conditioner operating states 242 that are information related to each air conditioning device controlled by the air conditioning management device 200. The connection information 241 includes connection relationships between the outdoor units 100a, 100b... Connected to the air conditioning management apparatus 200 and the indoor units 110a, 110b,. For example, the connection information 241 is initially stored according to a command from the management device 300. Further, the air conditioning management unit 212 monitors the connection state between each outdoor unit and the indoor unit based on communication with the air conditioner. If there is a change in the connection state, new connection information 241 indicating the connection relationship after the change. Is stored.

  The air conditioner operation state 242 and the temperature information 243 include the operation state of the air conditioner, for example, on / off distinction, set temperature, presence / absence of abnormality, and the indoor units 110a, 110b,... 110e, 110f or the remote controllers 120a, 120b,. The room temperature collected by 120e and 120f is included. The operation state information of the air conditioner operation state 242 is based on a signal indicating an operation notified from the input device 230 to the control unit 210 when the operation state of the air conditioner is switched by the operation of the input device 230 by the user of the facility. It is updated by the air conditioning management unit 212.

  In addition, the air conditioner operation state information of the air conditioner operation state 242 includes a signal indicating that a user of each air conditioner has operated with a remote controller from the remote controllers 120a, 120b,... 120e, 120f via the interface 260. When notified to 210, the air conditioning management unit 212 updates it.

  The switching information storage unit 250 stores a switching block 251 and an indoor unit priority 252 that are information relating to operation mode switching of each air conditioner. The switching block 251 stores an indoor unit switching block for simultaneously switching between the cooling and heating operation modes, and the indoor unit priority 252 compares the operation state of each indoor unit, and makes heating or cooling. A priority list indicating which indoor unit is to be determined with higher priority is stored.

  Each of the indoor units 110a, 110b,... 110e, 110f of the air conditioner is operated from any of the management device 300, the air conditioning management device 200, or the remote controllers 120a, 120b,. Even in response to requests, operation / stop and switching of operation modes are possible.

  FIG. 2 is a diagram illustrating an example of data contents stored in the switching block 251 in the air conditioning management device 200, and includes an indoor unit address and a switching block number. The switching block number indicates a group for switching between cooling and heating modes at the same time. When an outdoor unit of one refrigerant system that cannot use both cooling and heating is connected, each indoor unit connected to the outdoor unit is connected. Are set to the same switching block number as the same switching block. In FIG. 2, five indoor units indicated by indoor unit addresses 1 to 5 correspond to, for example, the indoor units 110a to 110e in FIG. 1, and these indoor units are predetermined outdoor units of one refrigerant system, for example, the outdoor units in FIG. It is shown that it is connected to the machine 100a.

  FIG. 3 is a diagram showing an example of the data content of the indoor unit priority 252 in the switching information storage unit 250 of the air conditioning management device 200, and includes an indoor unit address and a priority set for each indoor unit. Yes. The priority is set according to the installation location and operating capacity ratio of each indoor unit. If you want to operate an air conditioner installed in a conference room or executive room with priority over other air conditioners, When it is desired to reflect the size of the room to be performed (driving capacity ratio) in the priority, the number is set according to the priority. A higher number indicates a higher priority.

FIG. 4 shows a temperature difference score table for each indoor unit used when determining the operation mode to be switched in the air conditioning automatic switching system according to Embodiment 1 of the present invention.
The air conditioning management device 200 adds up the scores of all the indoor units belonging to the same switching block, and determines the operation mode based on the total score. In the figure, Δt represents the difference between the set temperature of the indoor unit and the ambient temperature. This figure shows an example in which the score is set in three categories of (set temperature-room temperature) less than 1.5 degrees, 1.5 degrees or more and less than 3 degrees, and 3 degrees or more.

  Next, a specific method for automatically and collectively switching the operation modes of the indoor units belonging to the same switching block in the cooling / heating automatic switching system according to this embodiment will be described.

  When it is desired to automatically switch the operation mode of a plurality of indoor units connected to a predetermined outdoor unit, for example, 110a, for example, 110a, 110b,... 110e, first, the air conditioning management device 200 and the outdoor unit .. 110e and remote controllers 120a, 120b,... 120e are set in connection information 241 in the air conditioning information storage unit 240 of the air conditioning management device 200.

This connection information may be set by input from the input device 230 of the air conditioning management device 200 or communication from the management device 300, and the air conditioning management device 200 itself may be the outdoor units 100a, 100b,. 110a, 110b,... 110e, 110f and the remote controllers 120a, 120b,... 120e, 120f may be communicated and automatically set.
The control unit 210 of the air conditioning management device 200 stores the set connection information in the connection information 241 in the air conditioning information storage unit 240.

  Next, the switching block 251 in the air conditioning management device 200 is set from the input device 230 or the management device 300 in the air conditioning management device 200 as illustrated in FIG. The switching block 251 is a block that displays indoor units whose operation modes are to be switched simultaneously, and a plurality of indoor units 110a, 110b,... 110e connected to one outdoor unit 100a are all set as the same switching block. However, when the remote controller for operating the indoor unit is connected so that a plurality of indoor units spanning the plurality of outdoor units 100a and 100b can be operated simultaneously, all the indoor units 110a connected to the spanning outdoor units are connected. 110b... 110e, 110f are the same switching block, and the operation modes of a plurality of outdoor units belonging to the same switching block are switched simultaneously.

  Next, the indoor unit priority 252 in the air conditioning management device 200 is set as illustrated in FIG. When switching between cooling and heating based on the ratio of the number of indoor units that require cooling operation and heating operation, the same priority is set for all indoor units. If priority is to be added according to the capacity ratio of the indoor units, a priority proportional to the capacity ratio is set. Any one of the indoor units is set as the master unit, and the operation mode of other indoor units belonging to the same switching block as the master unit is switched to the same operation mode as the master unit in response to a cooling operation or heating operation request of the master unit. If this is desired, the priority of indoor units other than the parent unit is set to zero.

  When operating the operation state of the indoor units 110a, 110b,... 110e from the remote controllers 120a, 120b,... 120e, the operation mode such as cooling and heating, and the operation state such as the set temperature, the interface 260 is used. Then, the air conditioning management device 200 is notified, and the operation state management unit 213 in the operation state management unit 212 stores each operation state in the air conditioner operation state 242 in the air conditioning information storage unit 240.

  When operating the operation state of the indoor units 110a, 110b,... 110e from the management device 300, the operation content from the management device 300 is notified to the air conditioning management device 200 via the interface 270, and the request in the control unit 210 is transmitted. After the requested content is analyzed by the content analysis unit 211, the air conditioning management unit 212 notifies the operation content to the indoor units 110 a, 110 b,... 110 e via the interface 260, and the operation state management unit 213 in the control unit 210. Thus, the air conditioner operation state 242 in the air conditioning information storage unit 240 is stored.

  When operating the operation status of the indoor units 110a, 110b,... 110e from the air conditioning management device 200, the operation content from the input device 230 is analyzed by the request content analysis unit 211 in the control unit 210, and the air conditioning management unit 212 notifies the indoor units 110a, 110b,... 110e via the interface 260, and the operation state is stored in the air conditioner operation state 242 in the air conditioner information storage unit 240 by the operation state management unit 213.

  The room temperature around each indoor unit is periodically collected by the temperature management unit 214 in the control unit 210 of the air conditioning management unit 200 and stored in the temperature information 243 in the air conditioning information storage unit 240. This room temperature information is collected using either a temperature sensor that measures the suction temperature installed inside the indoor unit, a temperature sensor installed inside the remote control, or a dedicated temperature sensor installed around the indoor unit. You may go.

  The compressor operation state of each outdoor unit is periodically collected by the compressor state management unit 215 in the control unit 210 of the air conditioning management unit 200, and the continuous operation time and stop time of the compressor are held.

The operation mode switching management unit 216 of the air conditioning management device 200 determines whether to switch between cooling and heating for each switching block in a fixed time unit.
The operation mode switching management unit 216 acquires information on the indoor units belonging to each switching block from the contents of the switching block 251 in the switching information storage unit 250, and displays the operation state of each indoor unit in the air conditioning unit in the air conditioning information storage unit 240. While acquiring from the operating state 242, the room temperature information around each indoor unit is acquired from the temperature information 243 in the air conditioning information storage unit 240.

  Among indoor units belonging to the same switching block, except for those that are stopped and those that are blowing, only indoor units that are operating in the cooling or heating mode are targeted, and the target indoor units are shown in FIG. Score according to the temperature difference score table shown. If the room temperature is higher than the set temperature of the indoor unit, a positive score will be given as if cooling is required.If the set temperature is higher than the room temperature, a positive score will be given as if heating is required. I do.

  Also, as the priority in FIG. 4, a number set in the indoor unit priority 252 in the switching information storage unit 250 based on FIG. 3 is used. Points are given to all target indoor units in the same switching block, and if the sum is positive, it is determined as cooling mode, and if it is negative, it is determined as heating mode and all target indoor units are in operation mode. Are switched at once.

  When the indoor unit priority 252 is set according to the capacity of the indoor unit, the operation mode is switched with priority on the one with the higher capacity, and the indoor unit other than the specific indoor unit designated as the master unit is switched. When the priority is set to 0, the operation mode of all indoor units is switched according to the request of the indoor unit designated as the parent unit.

  In the above example, the score is set to 0 if (set temperature-room temperature) is less than 1.5 degrees, and if (set temperature-room temperature) is 1.5 degrees or more and less than 3.0 degrees (1 point x priority) ), (2 points x priority) if (set temperature-room temperature) is 3.0 degrees or more, but the temperature range setting and score distribution are not limited to this, and can be changed as appropriate Needless to say.

  In the above example, the scoring is based on the difference between the set temperature and room temperature at a specific time. However, the temperature management unit 214 in the control unit 210 calculates the indoor temperature change rate within a certain time. Then, the temperature information 243 in the air conditioning information storage unit 240 may be held, and using this temperature change rate, the number of points assigned to an indoor unit with a high change rate may be increased to score each indoor unit.

  In addition to the set temperature and room temperature, the scoring system periodically detects the outdoor temperature using a temperature sensor installed in the outdoor unit or a dedicated temperature sensor in the temperature management unit 214 in the control unit 210. The temperature information 243 in the air conditioning information storage unit 240 is stored and this outdoor temperature is also used. When the outside air temperature is high, the distribution of the set temperature in the temperature difference score table of FIG. When the outside air temperature is low, the indoor units may be scored so that the heating side is prioritized by increasing the distribution of the set temperature> the room temperature in the temperature difference score table of FIG.

  Furthermore, control by the operation time of the compressor of the outdoor unit is not specified, but when the compressor has been stopped for a certain period of time, it may be a mechanism to make the timing for switching between cooling and heating earlier than usual. .

  In the above example, when switching between cooling and heating, the set temperature of each indoor unit is not changed, but at the timing of switching between cooling and heating, a specified value is added to the current set temperature, Or it is good also as a mechanism which reduces and changes preset temperature.

  As described above, according to the automatic cooling / heating switching system according to the first embodiment, even in an outdoor unit having only one refrigerant system, the cooling and heating are automatically performed in consideration of the set temperature and room temperature of each indoor unit. Therefore, the indoor unit can be automatically switched without installing an expensive outdoor unit equipped with refrigerant pipes for the two refrigerant systems for cooling and heating. Even if the indoor unit is in heating operation, if there are many indoor units whose room temperature is higher than the set temperature, it is possible to forcibly switch to cooling without operating the remote control. On the other hand, when there are many indoor units with low room temperature, it is possible to forcibly switch to heating.

Furthermore, it is not affected by the environment of a specific indoor unit because it decides which operation mode to switch from the set temperature and room temperature of all the indoor units that are operating without using the specific indoor unit as a master unit. Depending on the temperature distribution of the entire room, it is possible to switch between cooling and heating operation.
Further, it is not necessary to climb the back of the ceiling and switch the setting of the indoor unit in order to change the base unit and the slave unit.

In addition, by adding priority to each indoor unit and making it possible to perform switching determination between cooling and heating operation, the difference between the set temperature and room temperature is calculated only by the number of indoor units to determine the operation mode Instead, it is possible to adjust the operation mode switching timing by adding fine priorities according to the indoor environment, such as the capacity ratio of each indoor unit and the installation location of the indoor unit.
In addition, by adding priority only to specific indoor units in the same switching block, it is possible to switch between cooling and heating operation depending on the air conditioning environment of the room to be prioritized such as a conference room or an executive room.

  Furthermore, because the difference between the set temperature and room temperature of each indoor unit is large, it is possible to make a switching judgment between cooling and heating operation by increasing the number of points. It is possible to switch to the cooling operation after sufficiently warming the vicinity of the air conditioner installed in the air conditioner.

  In addition, since the rate of change of the indoor temperature near each indoor unit can be managed and the operation mode can be determined with priority given to indoor units with a large rate of change, the indoor unit that has not yet warmed to the set temperature or has not cooled. It is possible to switch between cooling and heating operation when the indoor unit reaches a certain temperature.

  Also, it is possible to manage the outside air temperature, raise the priority of heating when the outside air temperature is low, and raise the priority of cooling when the outside air temperature is high, so that the operation mode can be determined. In the cooling center and late autumn, it can be operated in the center of heating, and automatic operation according to the season is possible.

  In addition, even when an indoor unit operation group is set across multiple outdoor units, by including all the indoor units connected to the spanned outdoor unit in the same switching block, even in the same operation group, The problem that only the indoor unit operates normally can be solved.

  In addition, when switching between cooling and heating operation, the set temperature can be changed at the same time, so even if the comfortable temperature during cooling differs from the comfortable temperature during heating, the optimal set temperature for each operation mode It is possible to match.

It is a block diagram which shows the structure of the heating / cooling automatic switching system which concerns on Embodiment 1 of this invention. It is a figure which shows an example of the data content of the switching block in Embodiment 1 of this invention. It is a figure which shows an example of the data content of the indoor unit priority in Embodiment 1 of this invention. It is a figure which shows the temperature difference score table provided corresponding to the difference of the setting temperature of each indoor unit and room temperature in Embodiment 1 of this invention.

Explanation of symbols

10 Dedicated communication line or general-purpose communication line such as LAN, 11 Refrigerant piping and communication line,
20 General-purpose communication line such as LAN, 100a, 100b, ... Outdoor unit, 110a, 110b, ... 110e, 110f Indoor unit, 120a, 120b, ... 120e, 120f Remote control, 200 Air-conditioning management device, 210 Control unit, 211 Request content analysis Part,
212 air conditioning management unit, 213 operation state management unit, 214 temperature management unit, 215 compressor state management unit, 216 operation mode switching management unit, 220 display device, 230 input device, 240 air conditioning information storage unit, 241 connection information, 242 air conditioning Machine operating state,
243 temperature information, 250 switching information storage unit, 251 switching block, 252 indoor unit priority, 260, 270 interface, 300 management device.

Claims (7)

  In an air conditioning system in which a predetermined outdoor unit and a plurality of indoor units are connected by a single refrigerant pipe, temperature management means for detecting and managing the ambient temperature of each indoor unit, and the ambient temperature of each indoor unit And a management means for determining the operation mode of the air conditioning system by integrating the operation states of the indoor units corresponding to the set temperature differences of the indoor units, and cooling or heating the indoor units collectively based on the determination. An air-conditioning automatic switching system characterized by comprising an operation mode switching means for switching to operation.   A priority is set for each indoor unit, and the operation mode of the air conditioning system is determined based on the difference between the ambient temperature of each indoor unit and the set temperature of each indoor unit and the priority. The air conditioning automatic switching system according to claim 1.   In an air conditioning system in which a predetermined outdoor unit and a plurality of indoor units are connected by one system of refrigerant piping, temperature management means for detecting the ambient temperature of each of the indoor units and calculating a temperature change rate within a predetermined time period; In addition to setting a priority for each indoor unit according to the temperature change rate, the management means for determining the operation mode of the air conditioning system by comprehensively operating the indoor unit including the priority, and for the determination An air conditioning / automatic switching system characterized by comprising operation mode switching means for switching the indoor units to the cooling or heating operation collectively.   In an air conditioning system in which a predetermined outdoor unit and a plurality of indoor units are connected by one system refrigerant pipe, temperature management means for detecting and managing the ambient temperature and the outside air temperature of each indoor unit, The operation state of each indoor unit corresponding to the difference between the ambient temperature and the set temperature of each indoor unit is determined to determine whether the air conditioning system is to be cooled or heated, and according to the outside air temperature in the above determination A management means for changing the priority of cooling or heating operation, and an operation mode switching means for collectively switching the indoor units to cooling or heating operation based on the determination including the priority. Air conditioning automatic switching system.   The compressor state management means for managing the operation state of the compressor of the outdoor unit is provided, and the switching timing of the operation mode is changed according to the operation state of the compressor. Air-conditioning automatic switching system.   A plurality of the above-mentioned outdoor units are provided, and operation modes of the plurality of indoor units connected to the predetermined outdoor unit and the indoor units connected to the other outdoor units by one system refrigerant pipe are collectively controlled. In the air conditioning system, the management means determines the operation mode of the air conditioning system by comprehensively determining the operation state of all the indoor units connected to the plurality of outdoor units, and all the units connected to the plurality of outdoor units are connected. 2. The air conditioning / automatic switching system according to claim 1, wherein the operation modes of the indoor units are collectively switched.   2. The automatic cooling / heating switching system according to claim 1, wherein the set temperature of each indoor unit is switched when the operation mode is switched.

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