JP7438452B2 - air conditioning system - Google Patents

Description

The present disclosure relates to air conditioning systems.

Japanese Patent Laid-Open No. 2017-142013 (Patent Document 1) discloses that an air conditioner installed in an air conditioning compartment in which an opening with a structure that can be opened and closed continues to operate without the opening being closed. An air conditioner control device for suppressing an increase in energy consumption is disclosed.

JP 2017-142013 Publication

In recent years, it has been recognized that ventilation is important even in summer and winter when air conditioning is required to prevent infectious diseases. However, as shown in Japanese Unexamined Patent Application Publication No. 2017-142013 (Patent Document 1), measures have been taken to suppress the operation of air conditioners during ventilation to save energy; The decline was not seen as a problem. Furthermore, there was room for further improvement in ventilation efficiency when air conditioning and ventilation were performed simultaneously.

The present disclosure aims to disclose an air conditioning system that can maintain comfort even during ventilation. Another object of the present disclosure is to disclose an air conditioning system that can promote ventilation during ventilation.

The present disclosure relates to an air conditioning system that air-conditions a room. An air conditioning system consists of a sensor configured to detect the open/closed state of an opening provided in a room, an air conditioner that sucks in air from the room, conditions it, and sends it out to the room, and an air conditioner that controls the air conditioner according to the output of the sensor. and a control device that controls the. The control device is configured to allow the air conditioner to increase air conditioning when the sensor detects that the opening changes from a closed state to an open state.

An air conditioning system according to another aspect of the present disclosure includes a sensor configured to detect an open/closed state of an opening provided in a room, an air conditioner that sucks in air from the room, conditions the air, and sends the air to the room. The air conditioner includes a wind direction changing section that can change the direction of air sent toward the air conditioner, and a control device that controls the air conditioner according to the output of the sensor. The control device has a wind direction control system that uses a wind direction change unit to control the direction of air sent into the room so that ventilation of the room is promoted when the sensor detects that the opening has changed from a closed state to an open state. It is configured so that it can be carried out.

According to the air conditioning system of the present disclosure, it is possible to quickly increase air conditioning operation during ventilation, so the comfort of the room during ventilation can be maintained.

According to the air conditioning system according to another aspect of the present disclosure, ventilation is promoted when windows and the like are opened.

1 is a diagram showing the configuration of an air conditioning system according to Embodiment 1. FIG. It is a block diagram for explaining the composition of each control part of an outdoor unit, an indoor unit, and a remote control. It is a sectional view for explaining the composition of an indoor unit. It is a flowchart for explaining the process of switching control of the air conditioning system during ventilation and during normal operation. It is a flowchart for explaining thermo ON determination processing during normal control (cooling). It is a flowchart for explaining thermo-off determination processing during normal control (cooling). It is a flowchart for explaining thermo ON determination processing during normal control (heating). It is a flowchart for explaining thermo-OFF determination processing during normal control (heating). 5 is a flowchart for explaining ventilation control in Embodiment 1. FIG. It is a figure for explaining the wind direction when ventilation is not performed. FIG. 3 is a diagram for explaining wind direction control during ventilation during summer or intermediate season in Embodiment 1. FIG. 3 is a diagram for explaining wind direction control during ventilation during the winter season or the intermediate season in the first embodiment. FIG. 7 is a top view showing an example of a floor map of an air-conditioned space targeted in Embodiment 2; FIG. 7 is a side view for explaining wind direction control during ventilation during cooling operation in summer in Embodiment 2; FIG. 7 is a top view for explaining wind direction control during ventilation during cooling operation in summer in Embodiment 2; FIG. 7 is a side view for explaining wind direction control during ventilation during heating operation in winter in Embodiment 2; FIG. 7 is a top view for explaining wind direction control during ventilation during heating operation in winter in Embodiment 2; 7 is a flowchart for explaining control during ventilation in Embodiment 2. FIG. FIG. 2 is a diagram illustrating an example of a floor map in which an area that is difficult to ventilate occurs in a room. FIG. 7 is a top view for explaining wind direction control during ventilation in Embodiment 3. FIG. 7 is a side view for explaining wind direction control during ventilation in Embodiment 3. FIG. 2 is a diagram for explaining an example in which natural wind during ventilation is obstructed by an air conditioning system. FIG. 7 is a side view for explaining wind direction control during ventilation in Embodiment 4. It is a figure for explaining the modification of an opening-and-closing sensor.

Embodiments of the present disclosure will be described in detail below with reference to the drawings. Although a plurality of embodiments will be described below, it has been planned from the beginning of the application to appropriately combine the configurations described in each embodiment. In addition, the same reference numerals are attached to the same or corresponding parts in the drawings, and the description thereof will not be repeated. Note that in the following figures, the size relationship of each component may differ from the actual one.

Embodiment 1.
FIG. 1 is a diagram showing the configuration of an air conditioning system according to the first embodiment. The air conditioning system 1 shown in FIG. 1 includes an outdoor unit 10 that functions as a heat source and a cold source, an indoor unit 20 that uses heat and cold, a remote control 30, and an opening/closing detection sensor 40. The outdoor unit 10 and the indoor unit 20 constitute an air conditioner 2 that air-conditions a room 100.

The outdoor unit 10 includes a compressor 11 , an outdoor heat exchanger 12 , a fan 13 , a four-way valve 14 , and a control device 15 .

The indoor unit 20 includes a plurality of air conditioning units 20A to 20D arranged in the same room 100. The air conditioning unit 20A includes an expansion valve 21A, an indoor heat exchanger 22A, a fan 23A, a wind direction changing section 24A, and a control device 25A. The air conditioning unit 20B includes an expansion valve 21B, an indoor heat exchanger 22B, a fan 23B, a wind direction changing section 24B, and a control device 25B. The air conditioning unit 20C includes an expansion valve 21C, an indoor heat exchanger 22C, a fan 23C, a wind direction changing section 24C, and a control device 25C. The air conditioning unit 20D includes an expansion valve 21D, an indoor heat exchanger 22D, a fan 23D, a wind direction changing section 24D, and a control device 25D.

The control device 15 controls the compressor 11, the four-way valve 14, and the fan 13 according to the operation command signal given by the user and the outputs of various sensors.

The control device 15 includes a CPU (Central Processing Unit) 16, a memory 17, an input/output buffer (not shown), and the like. The CPU 16 develops and executes the program stored in the memory 17. This program is a program in which the processing procedure of the control device 15 is written. The control device 15 executes control of each device in the air conditioning system 1 according to these programs. The air conditioning control performed by the control device 15 is not limited to software processing, but may also be processed using dedicated hardware (electronic circuits).

Compressor 11 is configured to change its operating frequency in response to a control signal received from control device 15 . By changing the operating frequency of the compressor 11, the output of the compressor 11 is adjusted. The compressor 11 may be of various types, such as a rotary type, a reciprocating type, a scroll type, or a screw type.

The four-way valve 14 is controlled by a control signal received from the control device 15 to be in either a cooling operating state or a heating operating state. In the cooling operation state, the refrigerant discharged from the compressor 11 is sent to the outdoor heat exchanger 12, and the refrigerant that has passed through the indoor unit 20 is sucked into the compressor 11. In the heating operation state, the refrigerant discharged from the compressor 11 is sent to the indoor unit 20, and the refrigerant that has passed through the outdoor heat exchanger 12 is sucked into the compressor 11. Note that an accumulator (not shown) may be provided between the suction port of the compressor 11 and the four-way valve 14. Further, an oil separator (not shown) may be provided between the discharge port of the compressor 11 and the four-way valve 14.

The opening degree of the expansion valve 21A is controlled based on a control signal received from the control device 25A so that it is fully open, SH (superheat) control, SC (subcooling degree) control, or closed. be done. The fan 23A and the wind direction changing unit 24A control the blowout air volume and wind direction based on the control signal received from the control device 25A.

The opening degree of the expansion valve 21B is controlled based on a control signal received from the control device 25B so that it is fully open, SH controlled, SC controlled, or closed. The fan 23B and the wind direction changing unit 24B control the blowout air volume and wind direction based on the control signal received from the control device 25B.

The opening degree of the expansion valve 21C is controlled based on a control signal received from the control device 25C so that it is fully open, SH control, SC control, or closed. The fan 23C and the wind direction changing unit 24C control the blowout air volume and wind direction based on the control signal received from the control device 25C.

The opening degree of the expansion valve 21D is controlled based on a control signal received from the control device 25D so that it is fully open, SH controlled, SC controlled, or closed. The fan 23D and the wind direction changing unit 24D control the blowout air volume and wind direction based on the control signal received from the control device 25D.

The remote controller 30 is placed on a wall or the like and is configured to set and display the target temperature of the space to be air-conditioned. The remote control 30 includes a CPU 31, a memory 32, a display section 33, and the like. The settings, display, and other controls performed by the remote controller 30 are not limited to software processing, and can also be processed using dedicated hardware (electronic circuits).

The opening/closing detection sensor 40 is configured to detect the opening/closing state of openings such as windows and doors provided in the room 100.

The air conditioning system 1 of the first embodiment controls the air conditioner 2 including the outdoor unit 10 and the indoor unit 20 based on the open/closed state of the opening of the room 100 so as to prevent a decrease in comfort during ventilation. Furthermore, the air conditioning system of the first embodiment controls the air conditioner including the outdoor unit 10 and the indoor unit 20 to promote ventilation during ventilation based on the open/closed state of the opening of the room 100.

FIG. 2 is a block diagram for explaining the configuration of each control section of the outdoor unit, indoor unit, and remote controller. In FIG. 2, the control devices 25A to 25D for the indoor units are typically referred to as a control device 25.

The control device 25 receives commands from the remote controller 30 and controls the indoor unit 20 in general, for example. The control device 25 includes a CPU 26 that operates as a control section, a memory 27 that operates as a storage section, an input section 28 that receives input signals from a sensor, etc., and an output section 29 that outputs various control signals. The CPU 26, memory 27, input section 28, and output section 29 are connected by a data bus and exchange data.

The opening/closing detection sensor 40 includes an opening/closing sensor 41 that detects opening/closing of the opening on the window side, and an opening/closing sensor 42 that detects the opening/closing of the opening on the hallway side. Note that the number of opening/closing sensors may be increased or decreased depending on the number of openings used for ventilation.

The input unit 28 includes a room temperature recognition unit that receives input from a room temperature sensor (not shown), and an open/close recognition unit that receives outputs from the open/close sensors 41 and 42.

The CPU 26 operates as a normal control section, a window open determination section, a window closed determination section, and a ventilation control section by executing programs. The normal control section performs normal control of air conditioning. The window open determination unit determines whether an opening such as a window is open based on the open/close sensors 41 and 42. The window closing determination unit determines whether an opening such as a window is closed based on the opening/closing sensors 41 and 42. The ventilation control section performs ventilation control when the opening is open.

The memory 27 stores programs executed by the CPU 26 and data used by the CPU 26 for control. For example, a floor map of the room 100 in which the indoor unit 20 is installed is stored in the memory 27 as data. Note that the floor map data may not be the map itself in the memory, but may be a pointer or address number indicating position information.

The output unit 29 outputs control signals for controlling the wind direction, air volume, and refrigerant flow rate to the vane, fan, and expansion valve of the indoor unit 20, respectively. During ventilation, the output unit 29 outputs a control signal to the control device 15 of the outdoor unit to perform enhanced operation.

The control device 15 includes a CPU 16 that operates as a control section, a memory 17 that operates as a storage section, and an input section 18 that receives input signals from sensors and the like.

The CPU 16 controls the compressor, four-way valve, outdoor fan, etc. inside the outdoor unit. The memory 17 stores programs executed by the CPU 16 and data used by the CPU 16 for control. The input unit 18 receives a detection signal from an outside temperature sensor (not shown), etc.

The remote control 30 includes an operation switching unit that switches between cooling and heating, a temperature setting unit that sets a target temperature of the air-conditioned space, a display unit 33, and the like. When the display section 33 is a touch panel or the like, an operation switching section and a temperature setting section are also integrated with the display section 33. Note that the operation switching section and the temperature setting section may be configured with push buttons, adjustment knobs, and the like.

In this embodiment, the control device 25 disposed in the indoor unit, the control device 15 disposed in the outdoor unit, and the remote control 30 cooperate to execute control. Note that the control does not necessarily need to be performed by three control devices, and the control devices may be combined into one, and the number of control devices can be changed arbitrarily.

FIG. 3 is a sectional view for explaining the configuration of the indoor unit. The indoor unit 20 shown in FIG. 3 includes a fan 23, which is an example of a blower, and a heat exchanger 22. Although not shown in FIG. 3, the indoor unit 20 further includes a control device 25 and a suction temperature sensor.

The indoor unit 20 is a ceiling-embedded indoor unit that is installed embedded in the ceiling of the room 100, as shown in the cross-sectional view of FIG. The indoor unit 20 conditions the indoor air sucked in through an inlet provided at the center, and then blows out the conditioned air into the room from an outlet provided around the inlet. A vane, which is a type of wind direction changing section 24, is provided at the air outlet to control the air direction and open and close the air outlet. Although FIG. 3 shows vertical wind direction vanes that change the wind direction in the vertical direction, left and right wind direction vanes (not shown) are also provided. The wind direction changing unit 24 includes upper and lower wind direction vanes and left and right wind direction vanes. Note that the vane is sometimes called a flap or a louver.

The fan 23 is controlled by the control device 25 and generates a flow of air from the suction port toward the blowout port. That is, as the fan 23 rotates, it sucks in indoor air from the suction port and blows out conditioned air that has passed through the heat exchanger 22 from the blowout port.

During heating operation, when the current indoor temperature reaches the set temperature and the thermostat is turned off, the fan 23 is controlled to suppress the air volume. For example, the indoor temperature and the set temperature are transmitted from the remote control 30, and the control device 25 determines that the thermostat is turned off. The control device 25 that determines that the thermostat is OFF suppresses the air volume of the fan 23.

The suction temperature sensor is placed near the fan 23, for example, and measures the suction temperature of air sucked in from the suction port as the fan 23 rotates. The control device 25 receives information on the measured suction temperature directly from the suction temperature sensor or through the remote control 30. Note that the suction temperature sensor may be placed at another position within the air conditioner 100. For example, the suction temperature sensor may be placed near the suction port.

The heat exchanger 22 conditions the air by, for example, exchanging heat between the refrigerant circulating with the outdoor unit 10 and the air sucked in from the suction port. For example, the heat exchanger 22 cools, heats, or dehumidifies the air sucked in from the suction port.

Note that when the thermostat is turned off, the heat exchange by the heat exchanger 22 is controlled to stop. For example, in the thermo-OFF state, the control device 25 stops heat exchange in the heat exchanger 22 by closing the expansion valve to stop the circulation of the refrigerant or by stopping the compressor that compresses the refrigerant.

FIG. 4 is a flowchart illustrating a process for switching between control of the air conditioning system during ventilation and during normal operation. The processing in this flowchart is executed in the control device 25 in FIG. The processing in this flowchart corresponds to the processing when the CPU 26 operates as a window open determination section, a window closed determination section, and a ventilation control section. Note that the process of this flowchart may be executed by the remote controller 30 or the control device 15.

First, in step S1, the control device 25 determines whether an opening such as a window has changed from a closed state to an open state based on the output of the opening/closing sensor. If no change is detected (NO in S1), normal control is executed in step S5.

If a change is detected (YES in S1), it is determined in step S2 whether the open state of the opening continues for a certain period of time. If the open state does not continue for a certain period of time and returns to the closed state (NO in S2), normal control is executed in step S5. This eliminates the opening and closing of windows, etc. that are not for ventilation purposes.

If the open state continues for a certain period of time (YES in S2), ventilation control is executed in step S3. Then, in step S4, the control device 25 determines whether an opening such as a window has changed from an open state to a closed state based on the output of the opening/closing sensor. If no change is detected (NO in S4), the ventilation control in step S3 is maintained. If a change is detected (YES in S4), normal control is executed in step S5.

FIG. 5 is a flowchart for explaining thermo ON determination processing during normal control (cooling). The processing in this flowchart is executed by the control device 25 of the indoor unit 20. In step S11, the control device 25 determines whether a certain period of time has elapsed after the thermo-off determination. If the certain period of time has not elapsed (NO in S11), the process returns to the start of this flowchart.

If a certain period of time has elapsed (YES in S11), in step S12, the control device 25 determines whether the room temperature is higher than the determination temperature indicated by "set temperature + constant". If the room temperature is not higher than the determination temperature (NO in S12), the process returns to the start of this flowchart.

If the room temperature is higher than the determination temperature (YES in S12), the control is switched to the thermo ON state. In the thermo ON state, the compressor 11 is in operation, the opening degree of the expansion valve 21 of the indoor unit 20 is controlled, and the fan 23 also rotates according to the air volume setting.

FIG. 6 is a flowchart for explaining the thermo-off determination process during normal control (cooling). The processing in this flowchart is executed by the control device 25 of the indoor unit 20. In step S21, the control device 25 determines whether the room temperature is lower than the determination temperature expressed by "set temperature - constant". If the room temperature is not lower than the determination temperature (NO in S21), the process returns to the start of this flowchart.

If the room temperature is lower than the determination temperature (YES in S21), the control is switched to the thermo-off state. In the thermo-OFF state, the compressor 11 is stopped or the expansion valve 21 of the indoor unit 20 is closed.

Note that in the thermo ON determination and the thermo OFF determination, in the rapid operation performed during ventilation control, the determination temperature is changed from that in the normal operation. The difference between rapid operation and normal control is the rate of temperature rise or fall. Rapid operation basically cools the air quickly and strongly. During the ventilation control performed in step S3 in FIG. 4, rapid operation is performed to accelerate the timing of thermo ON determination.

In addition, during rapid operation, restrictions on compressor capacity control are made more relaxed than during normal control. In normal control, when the difference between the set temperature and the ambient temperature narrows, the indoor unit's expansion valve and compressor capacity control are put into energy-saving control, but in rapid operation, these restrictions are weakened.

For example, when ventilation occurs in the summer, the room temperature rises all at once, so if normal control is used, the room temperature will rise to some extent, but by performing rapid operation, the room temperature can be kept from rising as much as normal control.

An example during cooling explained in FIGS. 5 and 6 will be explained.
It is assumed that in normal times, the determination temperature is set as follows.
Thermo ON condition: room temperature > set temperature + constant A
Thermo OFF condition: room temperature < set temperature - constant A
On the other hand, during rapid operation, the determination temperature is set as follows.
Thermo ON condition: room temperature > set temperature + constant B
Thermo OFF condition: room temperature < set temperature - constant B
Note that constants A and B indicate a temperature range indicating a margin, and A>B.

By changing the determination temperature in this manner, rapid operation can be performed during ventilation, and the timing of determining whether the thermostat is ON or OFF can be brought forward.

FIG. 7 is a flowchart for explaining thermo ON determination processing during normal control (heating). The processing in this flowchart is executed by the control device 25 of the indoor unit 20. In step S31, the control device 25 determines whether a certain period of time has elapsed after determining that the thermostat is turned off. If the certain period of time has not elapsed (NO in S31), the process returns to the start of this flowchart.

If a certain period of time has elapsed (YES in S31), in step S32, the control device 25 determines whether the room temperature is lower than the determination temperature indicated by "set temperature - constant". If the room temperature is not lower than the determination temperature (NO in S32), the process returns to the start of this flowchart.

If the room temperature is lower than the determination temperature (YES in S32), the control is switched to the thermo ON state. In the thermo ON state, the compressor 11 and the fan 13 are in operation, the opening degree of the expansion valve 21 of the indoor unit 20 is controlled, and the fan 23 also rotates.

FIG. 8 is a flowchart for explaining the thermo-off determination process during normal control (heating). The processing in this flowchart is executed by the control device 25 of the indoor unit 20. In step S41, the control device 25 determines whether the room temperature is higher than the determination temperature represented by "set temperature + constant". If the room temperature is not higher than the determination temperature (NO in S41), the process returns to the start of this flowchart.

If the room temperature is higher than the determination temperature (YES in S41), the control is switched to the thermo-OFF state. In the thermo-OFF state, the compressor 11 is stopped or the expansion valve 21 of the indoor unit 20 is closed.

Even during heating, the determination temperature for thermo ON determination and thermo OFF determination is changed in the rapid operation performed during ventilation control compared to the normal operation. The difference between rapid operation and normal control is the rate of temperature rise or fall. Rapid operation basically heats the room quickly and strongly. Even during heating, rapid operation is performed during the ventilation control performed in step S3 in FIG. 4, and the timing of thermo ON determination is accelerated.

For example, when ventilation occurs in winter, the room temperature suddenly drops, so normal control will cause the room temperature to drop to a certain extent. Therefore, during ventilation, perform rapid operation to prevent the room temperature from falling below normal control.

FIG. 9 is a flowchart for explaining ventilation control in the first embodiment. The process in this flowchart shows details of the process in step S3 in FIG.

In the ventilation control, in step S51, the air conditioner performs an operation to enhance air conditioning. Specifically, the control device 25 increases the rotation speed of the fan 23 compared to the rotation speed set during normal operation, and in the outdoor unit, the control device 15 increases the operating frequency of the compressor 11. Note that the air conditioning may be increased by increasing only one of the rotational speed of the fan and the operating frequency of the compressor. Particularly in summer and winter, when the difference between the outside temperature and the indoor temperature is large, it is desirable to increase the operating frequency of the compressor 11 to increase the amount of refrigerant circulated. Further, the determination temperature for thermo ON/OFF determination is also changed to allow rapid operation.

Subsequently, in step S52, the control device 25 determines whether the indoor temperature is lower than the outdoor temperature. If indoor temperature<outdoor temperature holds true (YES in S52), the control device 25 sets the wind direction in the opposite direction to the opening in step S53. On the other hand, if indoor temperature<outdoor temperature does not hold (NO in S52), the control device 25 sets the wind direction in the direction of the opening in step S54.

The relationship between the wind direction and ventilation in steps S53 and S54 will be explained below. FIG. 10 is a diagram for explaining the wind direction when ventilation is not performed. As shown in FIG. 10, the wind direction changing units 24A and 24B control the vanes to an angle corresponding to the wind direction set by a remote controller or the like. Generally, indoor air is sucked in through the central suction port, conditioned, and the conditioned air is blown out from the air outlets around the suction port. is circulating.

That is, during normal control, the indoor unit circulates air to keep the temperature constant. Indoor units only circulate air, but cannot provide ventilation.

FIG. 11 is a diagram for explaining wind direction control during ventilation in the summer or intermediate season in the first embodiment. In summer, the outside temperature is higher than the room temperature. Even in intermediate seasons such as spring and autumn, the outside temperature may be higher than the room temperature. In such a case, the wind direction of the indoor unit is controlled as shown in FIG.

In this embodiment, the air flow throughout the room is created by giving directionality to the wind direction of the ceiling-embedded indoor unit that blows out in four directions. The premise behind this is the law that cold air moves towards warm air. This is because cold air has high pressure and warm air has low pressure.

The basic idea is that in summer, when the temperature outside the room is higher than inside, the wind direction is controlled in the direction opposite to the opening. Then, as shown in FIG. 11, the warm air is sent toward the back of the room 100 through the window 103, which is an opening, as shown by arrows W1 and W2. Then, the cold air flows as shown by arrows W3, W4, and W5 and is pushed out of the room 100 from below the window 103.

In this way, when there is air flow throughout the room, the air is sequentially exchanged at the openings due to the temperature difference between indoors and outdoors, making it possible to ventilate the entire room using an indoor unit.

When a normal indoor unit is operated, ventilation is basically performed only near the window, but in this embodiment, when it is detected that an opening is opened, the wind direction is controlled to promote ventilation.

FIG. 12 is a diagram for explaining wind direction control during ventilation during the winter season or the intermediate season in the first embodiment. In winter, the outside temperature is lower than room temperature. Furthermore, the outside temperature may be lower than the room temperature even in intermediate seasons such as spring and autumn. In such a case, the wind direction of the indoor unit is controlled as shown in FIG. 12.

The basic idea is that in winter, when the temperature outside the room is lower than inside, the direction of the wind is controlled in the direction of the opening. Then, as shown in FIG. 12, warm air is sent from the back of the room 100 toward the window 103 as shown by arrows W14, W13, and W15. Then, cold outside air flows into the room 100 from below the window 103 as shown by arrows W11 and W12.

Strictly speaking, even with normal airflow direction control, the vanes of the indoor unit move, stirring the air, and air moving outside of the window area due to people moving around, resulting in some ventilation. However, in this embodiment, air from the back of the room is actively moved toward the opening, so the ventilation effect is higher than when operating a normal indoor unit.

Note that several methods can be considered to automatically determine the wind direction during ventilation.
First, if the remote control is set to cooling mode, it is summer (outside temperature > room temperature), and if heating mode is set, it is winter (outside temperature < room temperature), and the wind direction during ventilation can be changed.

In addition, if the remote control is set to automatic cooling/heating switching mode, you can use the schedule function with a built-in calendar to determine the season and set the wind direction, or receive the weather forecast and determine the high or low temperature and set the wind direction. You can also

In addition, during the intermediate period, since the outside temperature and the set temperature are close to each other, the compressor should not be operated at increased capacity during ventilation, and only the wind direction and volume should be controlled in response to changes in the opening conditions. Also good.

As explained above, the air conditioning system of Embodiment 1 enhances air conditioning operation in the open state depending on the state of the opening.

Specifically, immediately after detecting that the opening has opened, in summer and winter, the operating frequency of the compressor is increased to perform rapid cooling or rapid heating. At the same time, the fan is controlled to increase the wind speed one step higher than normal. Either one of the compressor operating frequency and the fan rotation speed may be increased.

Thereby, it is possible to reduce the possibility that the room temperature deviates from the target temperature of the air conditioner during ventilation. Therefore, user comfort during ventilation can be improved.

In addition, the air conditioning system of Embodiment 1 controls the wind direction to create an air flow throughout the room that promotes ventilation, in addition to increasing the air conditioning operation when the opening is open. Note that the wind direction may be controlled to promote ventilation without increasing air conditioning operation. In particular, only the air volume or direction may be controlled during the spring and autumn seasons.

This facilitates ventilation by the air conditioning system during ventilation. Therefore, the entire room can be ventilated and the ventilation time can be shortened.

In addition, in this embodiment, a case has been described in which the air conditioning operation is increased, but there is a mode in which ventilation is prioritized as in this embodiment, and a mode in which energy saving is prioritized when windows are opened as in the past. The air conditioning system may be configured to be able to execute both modes, and the user may be able to select which mode to use.

Embodiment 2.
In addition to windows, openings such as doors may also be opened during ventilation. In the second embodiment, a plurality of openings are considered. To promote ventilation, it is preferable to have two or more openings such as windows and doors. The air conditioning system may be configured so that input signals from two locations, such as contacts or temperature sensors provided at each of the plurality of openings, are input to the indoor unit.

FIG. 13 is a top view showing an example of a floor map of a space to be air-conditioned in the second embodiment. FIG. 13 shows a view of the floor viewed from the ceiling. In the room 100A shown in FIG. 13, a window 103 is provided on a wall facing outdoors, and a door 104 is provided on a wall that is a boundary with a hallway or another room. Air conditioning units 20A to 20D are arranged on the ceiling.

Each of the air conditioning units 20A to 20D has the configuration shown in FIG. 3, but it can be clearly seen in FIG. 13 that they are ceiling-embedded cassette-type indoor units that can send air in four directions from four outlets. Each of the four air outlets is provided with a vane, and the air outlet can be opened and closed, and the wind direction can be changed in the open state.

An opening/closing sensor 41 for detecting opening/closing of the window 103 is arranged near the window 103, and an opening/closing sensor 42 for detecting opening/closing of the door 104 is arranged near the door 104. As each opening/closing sensor, a contact type opening/closing sensor or a temperature sensor that detects opening/closing based on a change in temperature can be used.

FIG. 14 is a side view for explaining wind direction control during ventilation during summer cooling operation in the second embodiment. FIG. 14 shows a usage example including a case where there is a hallway, which corresponds to the XIV-XIV cross section in FIG. 13. Wind direction control when ventilation is performed by opening the window 103 and door 104 during summer cooling operation will be explained with reference to FIG. However, assume that the environment is such that strong winds do not blow in even if the windows are opened.

If no air is blowing out from the indoor unit, cold air will accumulate at the bottom of the room and warm air will accumulate at the top of the room. If you are in an environment where strong winds do not blow in even when you open the windows, when you open the windows, the air slowly moves from the cold indoors at the bottom of the room to the warm outdoors.

Considering these air characteristics, if the hallway or separate room side is a closed space, by blowing air from each of the air conditioning units 20A and 20B toward the opening of the door 104, as shown by the large arrow in FIG. It is possible to create an air flow that takes warm air into the room, circulates the cool air inside the room around the lower part of the room, and moves it to the outside. This allows fresh air to come in through the windows and improves ventilation throughout the room.

Note that even if the hallway or separate room on the opposite side of the wall where the door 104 is installed is not a closed space and has an opening to another outside, the passage from the outside through the room 100A and from the hallway to another outside. Since there is a flow of air towards the area, ventilation can be achieved without any problems in this case as well.

FIG. 15 is a top view for explaining wind direction control during ventilation during summer cooling operation in the second embodiment. The four indoor units in this example are operated by one remote control attached to the wall. The four indoor units can be put into ventilation operation or into normal control at the same time by operating a remote control or the like. However, since the temperature sensors are individually attached, the timing of turning on the thermostat etc. differs from case to case.

In the example of room 100B in FIG. 15, the window and door are not provided on opposing walls, but even in such a case, the air outlet near the window in each indoor unit is closed, and the air outlet near the door is closed. Ventilation can be promoted by opening the door and setting the wind direction as shown by the arrow in the figure.

That is, when there are multiple indoor units for a room, the wind direction and angle of each indoor unit is changed during ventilation so that air can be smoothly taken in and exhausted from the room.

In summer or mid-season when the outside temperature is high, set the wind direction toward the door that is the opening on the indoor side or in the direction of the air conditioning unit 20A located close to the door, cool the outside air and send it to the upper part of the room, and the cooled air will flow indoors. This creates an airflow that flows through the bottom and exits the room through the window, ventilating the entire room. Note that the arrangement of indoor units that are close to the door and the direction of the door in each indoor unit can be determined from a floor map that is stored in advance.

FIG. 16 is a side view for explaining wind direction control during ventilation during heating operation in winter in the second embodiment. FIG. 17 is a top view for explaining wind direction control during ventilation during heating operation in winter in the second embodiment. Similarly, during heating operation in the winter, the air conditioning is reinforced during ventilation, and the wind direction is controlled in the opposite direction to that in the summer.

That is, during the cold season, in each of the air conditioning units 20A to 20D, the air outlet near the window is opened, the air outlet near the door is closed, and the wind direction is set so that the air outlet is directed toward the outdoor opening.

In winter or during the middle months when the outside temperature is low, the wind direction is set in the direction of the window or vent that is the outdoor opening, or in the direction of the air conditioning unit 20D located close to these, so that warm air flows through the upper part of the room and cool air creates an airflow that flows through the lower part of the room, ventilating the entire room. Note that the arrangement of the indoor units that are close to the windows or vents, and the direction of the windows or vents in each indoor unit can be known from the floor map stored in advance.

FIG. 18 is a flowchart for explaining control during ventilation in the second embodiment. In step S101, the non-ventilation time is reset. Then, normal control is started in step S102. Until a certain period of time has elapsed (NO in S103), normal control is continued without ventilation. If a certain period of time has passed without ventilation (YES in S103), in step S104, the control device 25 outputs a notification requesting opening of the opening. For example, in step S104, a message "Can ventilation control be started?" is displayed on the screen of the remote control. If the user refuses to release (YES in S105), the process from step S101 is repeated again. On the other hand, if the user agrees to open the window, for example, if the user manually opens the window and presses the OK button (NO in S105), in step S106 the control device 25 controls the window based on the output of the opening/closing sensor of the opening. Then, it is determined whether the opening of the opening is completed.

If the opening of the opening has not been completed (NO in S106), the process returns to step S104 and the control device 25 again outputs a message requesting opening of the opening to the remote control screen or the like.

On the other hand, when opening of the opening is completed (YES in S106), ventilation control from step S107 onwards is executed.

In addition, in step S104, the screen "Can you start ventilation control?" is displayed on the remote control, and if the user manually opens the window and presses the OK button (YES in S105 and YES in S106), step You may make it start ventilation control after S107.

Alternatively, you can set it to allow periodic ventilation control, and if the building has a system that automatically opens the windows when the time comes, you can set it to automatically start ventilation control. Also good.

In the ventilation control, first, in step S107, the control device 25 determines the current season. The season can be determined based on the calendar, temperature, distributed weather forecast, etc. Then, in step S108, as explained in FIGS. 14 to 17, the wind direction and air volume corresponding to the season are determined. Then, in step S109, a criterion for ending ventilation is calculated. For example, when determining the end of ventilation in step S109 based on the passage of time in ventilation control, the time required to exchange a certain percentage of air or more is calculated based on the ventilation amount determined from the site area and opening degree, and the time elapsed. Based on. Further, when determining the end of ventilation based on temperature, the end of ventilation control is determined using a normal relational expression for thermo ON/OFF of cooling and heating. For example, when air conditioning is being stably performed in a closed space under normal conditions, most of the time the thermostat is turned off. In such a case, opening the opening for ventilation creates a large difference between the room temperature and the outside temperature, satisfying the thermo ON condition. Rapidly enhanced air conditioning (comfort ventilation operation) is performed from the moment the thermo ON condition is met, and ventilation control is then terminated when the thermo OFF condition is reached.

Subsequently, in step S110, the control device 25 executes a comfortable ventilation operation that maintains comfort during ventilation with the determined air volume and wind direction. The comfortable ventilation operation is performed until the ventilation control end determination condition is satisfied in step S111.

The conditions for determining the end of ventilation control in step S111 can be determined based on the elapsed time of ventilation control or the relationship between the room temperature and the set temperature. The user may be able to select which condition to use for the termination determination, or whether to use both AND or OR.

If the ventilation control end determination condition is satisfied (YES in S111), in step S112, the control device 25 notifies the remote controller screen of a message requesting closing the opening. Then, in step S113, the control device 25 determines whether or not the opening has been completely closed, based on the output of the opening/closing sensor for the opening. In order to maintain comfort after ventilation, we used a remote control display to notify the user that the opening should be closed once sufficient ventilation was achieved, and the user could manually close the opening. The opening may be closed by pressing the button.

If the closing of the opening is not completed (NO in S113), the processes from step S110 onwards are repeated. On the other hand, when the opening has been completely closed (YES in S113), the process returns to step S101, the unventilated time is reset, and the processes from step S102 onwards are repeated.

Furthermore, after the opening/closing sensor detects that the opening has been closed (YES in S113), control is performed to perform enhanced operation in all directions for a short but fixed period of time to make the entire room comfortable. may be added before the processing in step S101. However, at this time, unlike during ventilation, it is preferable to return the wind direction to the state before the opening was opened.

As explained above, according to the air conditioning system of Embodiment 2, the following wind direction switching is performed in ventilation during cooling operation and ventilation during heating operation.

As shown in FIGS. 14 and 15, in ventilation during cooling operation, when a window is opened, dirty cold air moves to the warm air outside, so the entire room is ventilated. Then, fresh warm air enters the upper part of the room to replace the cold air that leaves. The indoor unit cools the air and blows it toward the door, which is an opening inside the room.

Further, as shown in FIGS. 16 and 17, during ventilation during heating operation, dirty warm air is blown by the indoor unit to an opening to the outdoors and is discharged outdoors. Then, to replace the outgoing warm air, fresh cold air enters the lower part of the room, and some of it flows out from the door, which is the opening inside the room.

In this way, according to the air conditioning system of this embodiment, ventilation is promoted by the indoor unit both during cooling operation and during heating operation.

Embodiment 3.
Depending on the placement of the openings, there may be areas in the room that are difficult to ventilate. In Embodiment 3, control during ventilation when such an area exists will be described.

FIG. 19 is a diagram showing an example of a floor map in which areas that are difficult to ventilate occur in a room. In the room 100C shown in FIG. 19, two openings, a door and a window, are close to each other, and when the wind direction is controlled as in the second embodiment, an area 110 is created that is difficult to ventilate.

FIG. 20 is a top view for explaining wind direction control during ventilation in Embodiment 3. FIG. 21 is a side view for explaining wind direction control during ventilation in Embodiment 3. As shown in FIGS. 20 and 21, an air outlet that can blow air into an area 110 facing the wall that is difficult to ventilate is opened, and the air direction setting during ventilation control of the air conditioning units 20A and 20B is set to "automatic". By changing the settings, you can agitate and ventilate the air in areas that are difficult to ventilate.

Note that some air circulates between the area 110, which is difficult to ventilate, and the air conditioning units 20A, 20B, so ventilation efficiency decreases, but a certain amount of air also flows to the right side, so ventilation is possible. Therefore, ventilation efficiency is improved compared to performing control as in the second embodiment.

Which outlet of which indoor unit should be opened during ventilation can be determined in advance from the floor map.

In addition, in the case of such an indoor configuration, ventilation efficiency is better if you simply place a circulator instead of trying to promote ventilation with the indoor unit alone. Therefore, the indoor unit may be provided with a function of turning on the contact during ventilation control, and the circulator may be powered on only during ventilation control.

Embodiment 4.
Depending on the arrangement of the openings, relatively strong winds may blow through during ventilation. In Embodiment 4, ventilation control in such a case will be described.

FIG. 22 is a diagram for explaining an example in which natural wind during ventilation is obstructed by an air conditioning system. For example, consider a room 100D in which windows are provided on each of two opposing walls. In such cases, strong winds may blow from window to window. For example, this situation is likely to occur on the upper floors of an apartment building.

For example, consider a case where when the ventilation mode is controlled during cooling operation, a strong wind blows in from the window 104D, and the air blowing direction of the indoor units 120A and 120B in the ventilation mode is opposite to the natural wind.

If the wind is strong enough that the natural airflow is not hindered by the indoor unit's airflow, this will not be a problem. For example, if you live in an environment where strong winds blow in when you open the windows, such as in an apartment with no shields around you, just opening the windows will provide sufficient ventilation, even if the indoor unit's wind direction and speed impede the natural wind. It's not a problem. To maintain comfort, the air conditioning system only needs to be able to operate at increased capacity.

However, if it is difficult for natural wind to pass through, such as when there is poor visibility around the house, the air blown from the indoor unit will hinder ventilation.

Therefore, in this embodiment, the direction of the air blown out from the indoor unit is made to match the direction in which the natural wind passes. FIG. 23 is a side view for explaining wind direction control during ventilation in Embodiment 4.

As shown in FIG. 23, in the fourth embodiment, wind direction and flow meters 41E and 42E are provided at two openings of a room 100E, a window 103E and a door 104E, respectively. By installing the wind direction and flow meter 41E, 42E in a position where the indoor units 120A, 120B are not directly exposed to the wind, it is possible to accurately detect the direction of the natural wind.

The control device 25 determines the direction of air blowing from the indoor unit based on the wind direction and air volume detected by the wind direction and air volume meters 41E and 42E in addition to the output from the opening/closing sensor. In FIG. 23, the control device 25 uses the wind direction control sections 124A and 124B of the indoor units 120A and 120B to match the main wind flow indicated by the large arrow detected by the wind direction and flow rate meters 41E and 42E. control. This makes it possible to increase the overall amount of air passing through the opening, thereby increasing the amount of ventilation.

In Embodiment 4, as shown in FIG. 23, the amount of ventilation can be increased by installing a wind vane in the opening and controlling the air to be blown toward the outlet side.

Note that even if a wind direction and flow meter is not attached, the user may be able to select the wind direction of the indoor unit during ventilation. For example, if the installation location is such that the natural wind always blows in the same direction, you can manually set the wind direction to the same direction as the natural wind. If the wind direction changes depending on the day, a message may be output to request the user to set the opening, ``Please set the opening with the strongest wind blowing.''

Various variations.
FIG. 24 is a diagram for explaining a modification of the opening/closing sensor. In the first to fourth embodiments, a contact point or a temperature sensor installed near the opening is used to recognize the state of the opening. Instead of this, an infrared sensor installed at a position away from the opening may be used.

For example, an infrared sensor installed in an indoor unit obtains a thermal image that displays temperature distribution in color, and displays it on a smartphone via communication. At the time of initial setting, the user specifies the position of the opening in the thermal image on the smartphone by touching the finger. Through this operation, the location of the opening may be input to the indoor unit from the position of the pixel of the thermal image, and the temperature change in that area may be detected by an infrared sensor to detect whether the opening is open or closed.

In this way, it is not necessary to install a temperature sensor near the opening.
The method of specifying the opening on the thermal image is, for example, by touching four points and specifying the opening in a rectangular range, or by touching one point and automatically calculating the temperature range of similar colors around the touched point. It may also be designated as an opening. Furthermore, various designation methods are possible, such as touching two places on the thermal image to designate two openings. Basically, if the control is to blow air toward the open area, and if the indoor opening and the outdoor opening are recognized separately, it becomes possible to control the air to align the direction of the air throughout the room.

Further, as for commands regarding the wind direction and angle of a plurality of indoor units as shown in FIGS. 15 and 17, settings prepared in advance according to the floor map pattern may be set for each indoor unit. In addition, we have prepared a system controller that manages the control of multiple indoor units, and in conjunction with an app that displays temperature distribution in color, the system controller determines and sends commands that instruct each indoor unit to the optimal wind direction and angle. You can also send it. Alternatively, a thermal image showing the temperature distribution may be recorded to confirm the effect.

Note that the control device 25 representatively shown in FIG. 2 is a control device that is managed as a representative by address number, DIP switch, communication, etc. among the control devices 25A to 25D of the indoor units 20A to 20D in FIG. It is also possible to decide on one. The wind direction instruction from the representative control device is transmitted to control devices other than the representative control device among the control devices 25A to 25D. In that case, the map, the location of the equipment, and the information on the opening location are held in the storage unit of the control device managed by the representative. In the representative control device, in the case of the arrangement as shown in FIG. 11, the wind direction instructions for the map may be determined differently for the indoor unit 20B located on the window side and the indoor unit 20A located on the wall side.

(summary)
The present disclosure relates to an air conditioning system 1 that air-conditions a room 100. The air conditioning system 1 includes an opening/closing detection sensor 40 configured to detect the opening/closing state of an opening provided in a room 100, an air conditioner 2 that sucks in air from the room 100, conditions it, and sends it out to the room 100. A control device 25 that controls the air conditioner 2 according to the output of the opening/closing detection sensor 40 is provided. The control device 25 is configured to be able to cause the air conditioner 2 to increase air conditioning when the opening/closing detection sensor 40 detects that the opening changes from the closed state to the open state.

Preferably, the air conditioner 2 includes a compressor 11 for circulating refrigerant, a heat exchanger 22 for exchanging heat between the air in the room 100 and the refrigerant, and a heat exchanger 22 for sending the air in the room to the heat exchanger 22. and a fan 23. The air conditioner 2 enhances air conditioning by increasing the operating frequency of the compressor 11 or increasing the rotational speed of the fan 23.

Preferably, the control device 25 is configured to select either the first mode or the second mode as the operating mode based on the user's settings. The first mode is an operation mode that causes the air conditioner 2 to increase air conditioning when the opening/closing detection sensor 40 detects that the opening changes from the closed state to the open state (ventilation priority). The second mode is an operation mode in which the air conditioner 2 suppresses air conditioning when the opening/closing detection sensor 40 detects that the opening changes from the closed state to the open state (eco-driving priority).

Preferably, the air conditioner 2 further includes a wind direction changing unit 24 that can change the direction of air sent toward the room 100. The control device 25 is capable of performing wind direction control in which the direction of air sent into the room 100 is controlled by the wind direction changing unit 24 so that ventilation of the room 100 is promoted when the opening is in the open state. configured.

More preferably, in the wind direction control, the control device 25 controls the wind direction changing unit 24 to send air in a first direction toward the opening when the room temperature is higher than the outside temperature, and when the room temperature is higher than the outside temperature. When the airflow direction is lower than the airflow direction, the airflow direction changing unit 24 is controlled to send air in a second direction opposite to the first direction.

More preferably, the air conditioning system 1 further includes wind direction and flow meters 41E and 42E that detect the direction of wind passing through the opening. In the wind direction control, the control device 25 controls the wind direction changing unit 24 based on the outputs of the wind direction and air volume meters 41E and 42E.

An air conditioning system 1 according to another aspect of the present disclosure includes an opening/closing detection sensor 40 configured to detect the opening/closing state of an opening provided in a room 100, and an opening/closing detection sensor 40 that sucks air from the room 100, air-conditions it, and supplies it to the room 100. An air conditioner 2 that sends out air, a wind direction change unit 24 that can change the direction of the air that is sent toward the room 100, and a control device 25 that controls the air conditioner 2 according to the output of the opening/closing detection sensor 40. Equipped with. When the opening/closing detection sensor 40 detects that the opening has changed from the closed state to the open state, the control device 25 changes the direction of the air sent to the room 100 so that ventilation of the room 100 is promoted. It is configured such that the wind direction can be controlled by the section 24.

The embodiments disclosed this time should be considered to be illustrative in all respects and not restrictive. The scope of the present disclosure is indicated by the claims rather than the description of the embodiments described above, and it is intended that all changes within the meaning and range equivalent to the claims are included.

1 Air conditioning system, 2 Air conditioner, 10 Outdoor unit, 11 Compressor, 12, 22, 22A, 22B, 22C, 22D Heat exchanger, 13, 23, 23A, 23B, 23C, 23D Fan, 14 Four-way valve, 15, 25, 25A, 25B, 25C, 25D Control device, 16, 26 CPU, 17, 27, 32 Memory, 18, 28 Input section, 20, 120A, 120B Indoor unit, 20A, 20B, 20C, 20D Air conditioning unit, 21, 21A, 21B, 21C, 21D Expansion valve, 24, 24A, 24B, 24C, 24D Wind direction changing section, 29 Output section, 30 Remote control, 33 Display section, 40 Open/close detection sensor, 41, 42 Open/close sensor, 41E, 42E Wind direction/air volume Total, 100, 100A, 100C, 100D, 100E Room, 103, 103E, 104D Window, 104, 104E Door, 110 Area, 124A, 124B Wind direction control section.

Claims (5)

An air conditioning system that air-conditions a room,
a sensor configured to detect an open/closed state of an opening provided in the room;
a wind direction sensor that detects the direction of wind passing through the opening;
an air conditioner that sucks in air from the room, conditions it, and sends it to the room;
and a control device that controls the air conditioner according to the output of the sensor,
The control device is configured to be able to cause the air conditioner to increase air conditioning when the sensor detects that the opening changes from a closed state to an open state,
The air conditioner includes:
including a wind direction changing unit capable of changing the direction of air sent toward the room,
The control device is capable of performing wind direction control in which the direction of air sent into the room is controlled by the wind direction changing unit so that ventilation of the room is promoted when the opening is in an open state. consists of
In the air-conditioning system, in the wind direction control, the control device controls the wind direction changing section based on the output of the wind direction sensor. The air conditioner includes:
a compressor for circulating refrigerant;
a heat exchanger that exchanges heat between the air in the room and the refrigerant;
a fan for sending air from the room to the heat exchanger,
The air conditioning system according to claim 1, wherein the air conditioner enhances air conditioning by increasing the operating frequency of the compressor or increasing the rotational speed of the fan. The control device is configured to select either a first mode or a second mode as an operating mode based on user settings,
The first mode is an operation mode in which the air conditioner increases air conditioning when the sensor detects that the opening changes from a closed state to an open state,
The air conditioning system according to claim 1 , wherein the second mode is an operation mode that causes the air conditioner to suppress air conditioning when the sensor detects that the opening changes from a closed state to an open state. . The air conditioner includes:
a compressor for circulating refrigerant;
a heat exchanger that exchanges heat between the air in the room and the refrigerant;
a fan for sending air from the room to the heat exchanger,
The air conditioning system according to claim 1 , wherein the air conditioner enhances air conditioning by increasing the operating frequency of the compressor or increasing the rotational speed of the fan. In the wind direction control, the control device controls the wind direction changing unit to send air in a first direction toward the opening when the room temperature is higher than the outside temperature, and when the room temperature is higher than the outside temperature. The air conditioning system according to claim 1 , wherein when the airflow direction is low, the air direction changing unit is controlled to send air in a second direction opposite to the first direction.

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