WO2022195853A1

WO2022195853A1 - Air conditioning system

Info

Publication number: WO2022195853A1
Application number: PCT/JP2021/011409
Authority: WO
Inventors: 千賀田邊; 宗一郎 ▲徳▼久
Original assignee: 三菱電機株式会社
Priority date: 2021-03-19
Filing date: 2021-03-19
Publication date: 2022-09-22
Also published as: JP7438452B2; JPWO2022195853A1

Abstract

An air conditioning system (1) is provided with: an open/close detection sensor (40) configured to detect an open/close state of an opening provided in a room (100); an air conditioning device (2) that draws in air from the room (100), and conditions and delivers the air to the room (100); and a control device (25) that controls the air conditioning device (2) in accordance with the output from the open/close detection sensor (40). The control device (25) is configured to be able to cause, when the open/close detection sensor (40) detects that the opening has changed from a closed state to an open state, the air conditioning device (2) to enhance air conditioning.

Description

air conditioning system

This disclosure relates to an air conditioning system.

Japanese Patent Application Laid-Open No. 2017-142013 (Patent Document 1) discloses that an air conditioner provided in an air conditioning section having an opening having a structure that can be opened and closed continues to operate while the opening is not closed. Disclosed is an air conditioner control device for suppressing an increase in the amount of energy.

JP 2017-142013 A

In recent years, it has become recognized that ventilation is important for the prevention of infectious diseases, even in summer and winter when air conditioning is required. However, as shown in Japanese Patent Application Laid-Open No. 2017-142013 (Patent Document 1), measures are taken to suppress the operation of the air conditioner during ventilation and perform energy saving operation, but comfort due to ventilation is improved. Decrease was not seen as a problem. In addition, there is still room for improvement in terms of ventilation efficiency when air conditioning and ventilation are performed at the same time.

The purpose of this disclosure is 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 capable of promoting ventilation during ventilation.

The present disclosure relates to an air conditioning system that air-conditions a room. The air conditioning system includes a sensor configured to detect the open/closed state of an opening provided in a room, an air conditioner that draws air from the room, air-conditions it, and sends it out to the room, and an air conditioner that responds to the output of the sensor. and a control device for controlling the The control device is configured to allow the air conditioner to increase air conditioning when the sensor detects that the opening has changed from the closed state to the open state.

An air-conditioning system according to another aspect of the present disclosure includes a sensor configured to detect the open/closed state of an opening provided in a room, an air conditioner that takes in air in the room, air-conditions it, and delivers it to the room, and a controller for controlling the air conditioner according to the output of the sensor. When the sensor detects that the opening changes from closed to open, the control device controls the direction of the air sent to the room by the air direction changing unit so as to promote ventilation of the room. is configured to be able to perform

According to the air conditioning system of the present disclosure, it is possible to rapidly increase the air conditioning operation during ventilation, so it is possible to maintain the comfort of the room during ventilation.

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

1 is a diagram showing the configuration of an air conditioning system according to Embodiment 1; FIG. FIG. 3 is a block diagram for explaining the configuration of each control unit of the outdoor unit, indoor unit, and remote control; It is a sectional view for explaining composition of an indoor unit. 4 is a flowchart for explaining a process of switching control of the air conditioning system between ventilation and normal control; 7 is a flowchart for explaining thermo ON determination processing during normal control (cooling); 7 is a flowchart for explaining thermo-OFF determination processing during normal control (cooling); 7 is a flowchart for explaining thermo ON determination processing during normal control (heating); 9 is a flowchart for explaining thermo-OFF determination processing during normal control (heating). 4 is a flowchart for explaining control during ventilation according to Embodiment 1. FIG. FIG. 5 is a diagram for explaining the wind direction when ventilation is not performed; FIG. 4 is a diagram for explaining wind direction control during ventilation in the summer or intermediate season according to Embodiment 1; FIG. 4 is a diagram for explaining wind direction control during ventilation in the winter season or intermediate season according to Embodiment 1; FIG. 9 is a top view showing an example of a floor map of an air-conditioned space targeted in Embodiment 2; FIG. 11 is a side view for explaining wind direction control during ventilation during cooling operation in summer in Embodiment 2; FIG. 11 is a top view for explaining wind direction control during ventilation during cooling operation in summer in Embodiment 2; FIG. 11 is a side view for explaining wind direction control during ventilation during heating operation in winter in Embodiment 2; FIG. 11 is a top view for explaining wind direction control during ventilation during heating operation in winter in Embodiment 2; 10 is a flow chart for explaining control during ventilation according to Embodiment 2. FIG. FIG. 10 is a diagram showing an example of a floor map in which an area that is difficult to ventilate occurs in a room; FIG. 11 is a top view for explaining wind direction control during ventilation in Embodiment 3; FIG. 11 is a side view for explaining wind direction control during ventilation in Embodiment 3; FIG. 4 is a diagram for explaining an example in which natural wind during ventilation is blocked by an air conditioning system; FIG. 12 is a side view for explaining wind direction control during ventilation in Embodiment 4; It is a figure for demonstrating the modification of an opening-and-closing sensor.

Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. A plurality of embodiments will be described below, but appropriate combinations of the configurations described in the respective embodiments have been planned since the filing of the application. The same or corresponding parts in the drawings are denoted by the same reference numerals, and the description thereof will not be repeated. In the following figures, the size relationship of each component may differ from the actual size.

Embodiment 1.
FIG. 1 is a diagram showing the configuration of an air conditioning system according to Embodiment 1. FIG. 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 open/close detection sensor 40 . The outdoor unit 10 and the indoor unit 20 constitute an air conditioner 2 that air-conditions the 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 a program stored in the memory 17 . This program is a program in which processing procedures of the control device 15 are described. 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 processing by software, and processing by dedicated hardware (electronic circuit) is also possible.

The compressor 11 is configured to change the operating frequency according to a control signal received from the control device 15 . By changing the operating frequency of the compressor 11, the output of the compressor 11 is adjusted. Various types such as a rotary type, a reciprocating type, a scroll type, and a screw type can be adopted for the compressor 11 .

The four-way valve 14 is controlled by a control signal received from the control device 15 so as to be in either the cooling operation state or the heating operation 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 . An accumulator (not shown) may be provided between the suction port of the compressor 11 and the four-way valve 14 . An oil separator (not shown) may be provided between the discharge port of the compressor 11 and the four-way valve 14 .

The expansion valve 21A is controlled in its degree of opening based on a control signal received from the control device 25A so as to be fully open, SH (superheat: degree of heating) control, SC (subcool: degree of supercooling) control, or closed. be done. The fan 23A and the wind direction changer 24A control the blowing air volume and wind direction based on the control signal received from the control device 25A.

The opening of the expansion valve 21B is controlled based on a control signal received from the control device 25B so as to perform either full opening, SH control, SC control or closing. The fan 23B and the wind direction changer 24B control the blowing air volume and wind direction based on the control signal received from the control device 25B.

The opening of the expansion valve 21C is controlled based on a control signal received from the control device 25C so as to perform either full opening, SH control, SC control or closing. The fan 23C and the wind direction changer 24C control the blowing air volume and wind direction based on the control signal received from the control device 25C.

The opening of the expansion valve 21D is controlled based on a control signal received from the control device 25D so as to perform either full opening, SH control, SC control or closing. The fan 23D and the wind direction changer 24D control the blowing air volume and wind direction based on the control signal received from the control device 25D.

The remote controller 30 is arranged on a wall surface or the like, and configured to set and display the target temperature of the space to be air-conditioned. Remote controller 30 includes CPU 31, memory 32, display unit 33, and the like. The control of setting, display, etc. performed by the remote control 30 is not limited to processing by software, and can be processed by dedicated hardware (electronic circuit).

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

The air conditioning system 1 of Embodiment 1 controls the air conditioner 2 consisting of 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 deterioration of comfort during ventilation. Further, the air conditioning system of Embodiment 1 controls the air conditioner composed of the outdoor unit 10 and the indoor unit 20 based on the opening/closing state of the opening of the room 100 so as to promote ventilation during ventilation.

FIG. 2 is a block diagram for explaining the configuration of each control unit for the outdoor unit, indoor unit, and remote control. In FIG. 2, the control devices 25A to 25D of the indoor units are represented as the control device 25. As shown in FIG.

For example, the control device 25 receives commands from the remote control 30 and controls the indoor unit 20 in general. 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 sensors and the like, 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 to 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 opening/closing of the opening on the corridor 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 inputs 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 unit performs normal control of air conditioning. The window open determination unit determines whether an opening such as a window is open based on 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 unit provides control for ventilation 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, the 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 does not necessarily exist in the memory itself, but may be a pointer indicating position information or an address number.

The output unit 29 outputs control signals for controlling the wind direction, air volume, and refrigerant flow rate to the vanes, fans, and expansion valves 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 so as to execute the augmented operation.

The control device 15 includes a CPU 16 that operates as a control unit, a memory 17 that operates as a storage unit, and an input unit 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 detection signals from an outside air temperature sensor (not shown) and the like.

The remote controller 30 includes an operation switching unit for switching cooling/heating operation, a temperature setting unit for setting the target temperature of the air-conditioned space, a display unit 33, and the like. When the display unit 33 is a touch panel or the like, the operation switching unit and the temperature setting unit are also integrated with the display unit 33 . The operation switching unit and temperature setting unit may be configured by push buttons, adjustment knobs, and the like.

In the present embodiment, the control device 25 arranged in the indoor unit, the control device 15 arranged in the outdoor unit, and the remote control 30 cooperate to execute control. It should be noted that the control does not necessarily have to be performed by three control devices, the control devices may be integrated into one, and the number of control devices can be changed arbitrarily.

FIG. 3 is a cross-sectional view for explaining the configuration of the indoor unit. The indoor unit 20 shown in FIG. 3 includes a fan 23 and a heat exchanger 22, which are an example of a blower. Although not shown in FIG. 3, 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 embedded in the ceiling of the room 100 as shown in the cross-sectional view of FIG. The indoor unit 20 air-conditions the indoor air taken in through the suction port provided in the center, and blows out the air-conditioned air into the room through outlets provided around the suction port. The air outlet is provided with a vane, which is a kind of air direction changing unit 24, to control the air direction and open and close the air outlet. FIG. 3 shows vertical airflow direction vanes for changing the vertical airflow direction, but horizontal airflow direction vanes (not shown) are also provided. The wind direction changing unit 24 includes vertical wind direction vanes and horizontal wind direction vanes. The vanes are sometimes called flaps or louvers.

The fan 23 is controlled by the control device 25 to generate a flow of air from the inlet to the outlet. That is, as the fan 23 rotates, the fan 23 sucks indoor air through the suction port, and blows the conditioned air that has passed through the heat exchanger 22 through the blowout port.

When the current indoor temperature reaches the set temperature during heating operation and the thermostat is turned off, the fan 23 is controlled to reduce the air volume. For example, the indoor temperature and the set temperature are transmitted from the remote controller 30, and the controller 25 determines that the thermostat is OFF. When the controller 25 determines that the thermostat is OFF, the air volume of the fan 23 is suppressed.

The suction temperature sensor is arranged, for example, near the fan 23 and measures the suction temperature of the air sucked from the suction port as the fan 23 rotates. The controller 25 receives information on the measured suction temperature directly from the suction temperature sensor or via the remote controller 30 . Note that the intake temperature sensor may be arranged at another position within the air conditioner 100 . For example, the suction temperature sensor may be located 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 from the suction port. For example, the heat exchanger 22 cools, heats, or dehumidifies the air sucked from the suction port.

It should be noted 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 circulation of the refrigerant or by stopping the compressor that compresses the refrigerant.

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

First, in step S1, the control device 25 determines whether or not the opening such as the window has changed from the closed state to the open state based on the output of the open/close 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 or not the opening has remained open 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 and the like 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 or not the opening such as the window has changed from the open state to the closed state based on the output of the open/close sensor. If no change is detected (NO in S4), the ventilatory 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 of this flowchart is executed by the controller 25 of the indoor unit 20 . In step S11, the control device 25 determines whether or not a certain period of time has elapsed after the thermo-off determination. If the predetermined time has not passed (NO in S11), the process is returned to the start of this flowchart.

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

When the room temperature is higher than the judgment temperature (YES in S12), control is switched to the thermo ON state. In the thermo ON state, the compressor 11 is in an operating state, the degree of opening 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 of this flowchart is executed by the controller 25 of the indoor unit 20 . In step S21, the control device 25 determines whether or not the room temperature is lower than the determination temperature indicated by "set temperature - constant". If the room temperature is not lower than the judgment temperature (NO in S21), the process is returned to the start of this flowchart.

When the room temperature is lower than the judgment temperature (YES in S21), 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.

It should be noted that the determination temperatures for the thermo ON determination and the thermo OFF determination are changed in rapid operation executed during ventilation control compared to normal operation. The difference between rapid operation and normal control is the rate of temperature rise or fall. Rapid operation basically cools quickly and strongly. During the ventilation control executed in step S3 of FIG. 4, rapid operation is executed, and the timing of the thermo ON determination is advanced.

In addition, during rapid operation, the restrictions on compressor capacity control are loosened more than during normal control. In normal control, when the difference between the set temperature and the ambient temperature is reduced, the expansion valve and compressor capacity control of the indoor unit are controlled to save energy.

For example, if you ventilate in the summer, the room temperature rises at once, so with normal control, the room temperature rises to some extent, but by performing rapid operation, you can prevent the room temperature from rising more than normal control.

An example at the time of cooling described with reference to FIGS. 5 and 6 will be described.
Assume that the determination temperature is set as follows under normal conditions.
Thermo ON conditions: 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 the constants A and B indicate temperature ranges indicating margins, where A>B.

By changing the determination temperature in this way, rapid operation can be performed during ventilation, and the timing of determination of thermo ON or thermo OFF can be advanced.

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

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

When the room temperature is lower than the judgment temperature (YES in S32), 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 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 of this flowchart is executed by the controller 25 of the indoor unit 20 . In step S41, the control device 25 determines whether or not the room temperature is higher than the determination temperature indicated by "set temperature + constant". If the room temperature is not higher than the judgment temperature (NO in S41), the process is returned to the start of this flowchart.

When the room temperature is higher than the judgment temperature (YES in S41), 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 judgment temperatures for the thermo ON judgment and thermo OFF judgment are changed in rapid operation executed during ventilation control compared to normal operation. The difference between rapid operation and normal control is the rate of temperature rise or fall. Rapid operation basically heats quickly and strongly. Also during heating, rapid operation is executed during the ventilation control executed in step S3 of FIG.

For example, if you ventilate in winter, the room temperature will drop at once, so if you use normal control, the room temperature will drop to some extent. Therefore, during ventilation, rapid operation is performed so that the room temperature does not fall below normal control.

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

In the ventilation control, in step S51, the air conditioner is operated to increase the air conditioning. Specifically, the controller 25 increases the rotation speed of the fan 23 above the rotation speed set during normal operation, and the controller 15 increases the operating frequency of the compressor 11 in the outdoor unit. It should be noted that the enhancement of air conditioning may be either an increase in the rotation speed of the fan or an increase in the operating frequency of the compressor. In particular, in summer and winter, when there is a large difference between the outside air temperature and the indoor temperature, it is desirable to increase the operating frequency of the compressor 11 to increase the circulation amount of the refrigerant. Also, the judgment temperature for thermo ON/OFF judgment is changed so as to allow rapid operation.

Subsequently, in step S52, the control device 25 determines whether the indoor temperature is lower than the outdoor temperature. If the indoor temperature<outdoor temperature is established (YES in S52), the control device 25 sets the wind direction in the direction opposite to the opening in step S53. On the other hand, if the indoor temperature<outdoor temperature does not hold (NO in S52), the controller 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 described 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. In general, room air is sucked in from the central suction port, air-conditioned, and the conditioned air is blown out from outlets around the suction port, and the air flows into the room 100 as indicated by the arrows in the figure. is circulating.

That is, during normal control, the indoor unit circulates air to keep the temperature constant. The indoor unit only circulates air and does not provide ventilation.

FIG. 11 is a diagram for explaining wind direction control during ventilation in the summer or intermediate season according to the first embodiment. In summer, the outside temperature is higher than the room temperature. The outside air temperature may be higher 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.

In this embodiment, the airflow of the entire room is created by giving directionality to the airflow direction of the ceiling-embedded four-way blowing indoor unit. The premise is that cold air moves toward warm air. 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, warm air is sent to the interior of the room 100 through the window 103, which is an opening, as indicated by arrows W1 and W2. Then, cold air flows as indicated by arrows W3, W4, and W5 and is pushed out of the room 100 from below the window 103. FIG.

In this way, if there is an air flow throughout the room, the temperature difference between the indoor and outdoor areas will cause the air to be sequentially replaced at the openings, so the indoor unit can be used to ventilate the entire room.

In normal indoor unit operation, ventilation is basically only performed near the windows, but in this embodiment, when it is detected that the opening is open, the wind direction is controlled to promote ventilation.

FIG. 12 is a diagram for explaining wind direction control during ventilation in the winter season or intermediate season according to the first embodiment. In winter, the outside temperature is lower than the room temperature. In addition, the outside air 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.

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

Strictly speaking, even with normal wind direction control, the air is agitated because the vanes of the indoor unit move, and the air outside the window area moves due to the movement of people, etc., so there is some ventilation. However, in this embodiment, since the air in the back of the room is actively moved to the opening side, the ventilation effect is higher than that of the normal operation of the indoor unit.

Several methods are conceivable for automatically determining the wind direction during ventilation.
First, it is possible to switch the direction of the wind during ventilation by simply setting the remote controller to summer (outside temperature > room temperature) in the cooling mode and winter (outside temperature < room temperature) in the heating mode.

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

In addition, during the interim period, the outside temperature and the set temperature are close to each other, so the compressor is not boosted during ventilation, and only the air direction and air volume are controlled in response to changes in the state of the opening. Also good.

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

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

This makes it possible to reduce the deviation of the room temperature from the air conditioning target temperature during ventilation. Therefore, the user's comfort during ventilation can be improved.

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

As a result, ventilation is promoted by the air conditioning system during ventilation. Therefore, the entire room can be ventilated and the ventilation time can be shortened.

In the present embodiment, the case where the air conditioning operation is enhanced has been described. The air conditioning system may be configured so that both modes can be executed, and the user can select which one to use.

Embodiment 2.
In addition to windows, openings such as doors may also be opened during ventilation. In Embodiment 2, multiple openings are considered. In order to promote ventilation, it is desirable to have two or more openings such as windows and doors. The air conditioning system may be configured such that two input signals from contacts or temperature sensors provided in each of the plurality of openings are input to the indoor units.

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

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

An open/close sensor 41 for detecting opening/closing of the window 103 is arranged near the window 103, and an open/close 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 temperature change can be used.

FIG. 14 is a side view for explaining wind direction control during ventilation during cooling operation in summer according to the second embodiment. FIG. 14 shows the state of an example of use including the case where there is a corridor, which corresponds to the XIV-XIV section of FIG. FIG. 14 will be used to explain wind direction control when windows 103 and doors 104 are opened for ventilation during cooling operation in summer. However, even if the window is opened, the environment is such that a strong wind does not blow in.

When air is not blowing out from the indoor unit, cool air accumulates in the lower part of the room and warm air accumulates in the upper part of the room. If the window is open and no strong wind blows in, the air will slowly move from the cold interior to the warm exterior in the lower part of the room when the window is opened.

Considering these characteristics of air, if the corridor or separate room 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 arrows in FIG. Warm air is taken into the room, and cold air in the room goes around the lower part of the room and moves to the outside. This allows fresh air to enter through the windows and promote ventilation throughout the room.

Even if the corridor opposite to the wall on which the door 104 is provided or the separate room is not a closed space but has an opening to the outside, the room 100A can be passed through from the outside to the outside from the corridor. In this case, too, ventilation can be performed without problems because of the flow of air toward the room.

FIG. 15 is a top view for explaining wind direction control during ventilation during cooling operation in summer according to the second embodiment. The four indoor units in this example are operated by one remote controller attached to the wall. The four indoor units are simultaneously set to ventilation operation or normal control by operating the remote control or the like. However, since the temperature sensors are individually attached, the timing for turning on the thermostat differs from one to another.

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

In other words, if there are multiple indoor units for a room, change the wind direction angle of each indoor unit during ventilation so that air intake into and exhaust from the room goes smoothly.

In the summer or in the middle of the season when the outside temperature is high, the wind direction is set in the direction of the door that is the indoor side opening or in the direction of the air conditioning unit 20A that is close to the door, and the outside air is cooled and sent to the upper part of the room, and the cold air is sent to the room. Ventilate the entire room by creating an air current that flows through the lower part and goes out of the room through the window. The layout of the indoor units close to the door and the direction of the door for each indoor unit can be known from a pre-stored floor map.

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

That is, in the cold season, in each of the air conditioning units 20A to 20D, the air outlets near the windows are opened, the air outlets near the doors are closed, and the wind is directed toward the outdoor openings.

In winter or in the middle of the season when the outside temperature is low, the wind direction is set in the direction of the window or the ventilation opening that is the outdoor side opening, or in the direction of the air conditioning unit 20D that is close to them, and warm air flows in the upper part of the room, and cold air creates an air current that flows through the lower part of the room and ventilates the entire room. The layout of the indoor units close to the windows or ventilation openings and the direction of the windows or ventilation openings for each indoor unit can be known from a pre-stored floor map.

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 elapses (NO in S103), normal control is continued with no 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 "Do you want to start ventilation control?" is displayed on the screen of the remote control. If the user refuses to open the door (YES at S105), the process from step S101 is repeated. 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 opening/closing sensor based on the output of the opening/closing sensor. to determine whether or not the opening of the opening has been completed.

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

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

In step S104, the remote controller displays a screen asking "Are you sure you want to start control during ventilation?" You may make it start the ventilation control after S107.

Also, instead of this, if the building is set to allow periodic ventilation control, and if the building has a mechanism that automatically opens the windows when the time is up, the ventilation control will start automatically. Also good.

In the ventilation control, first, in step S107, the control device 25 determines the current season. Season determination can be based on calendars, temperatures, distributed weather forecasts, and the like. Then, in step S108, as described with reference to FIGS. 14 to 17, the wind direction and wind volume corresponding to the season are determined. Then, in step S109, a criterion for ending ventilation is calculated. The criterion for ending ventilation in step S109 is, for example, when judging by the passage of time in ventilation control, the time in which a certain percentage or more of the air can be replaced based on the amount of ventilation determined from the site area and the opening opening is calculated, and the passage of time based on Further, when judging the end of ventilation by temperature, the end of ventilation control is determined using the relational expression of thermo ON/OFF of normal cooling and heating. For example, when air conditioning is stably performed in a closed space at normal times, most of the thermostats are basically in the OFF state. In such a case, if the opening is opened for ventilation, a large difference between the room temperature and the outside air temperature is generated, satisfying the thermo ON condition. When the thermo-ON condition is satisfied, the rapid-enhancement air conditioning (comfortable ventilation operation) is performed, and then the ventilation control is terminated when the thermo-OFF condition is met.

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 end determination condition of the ventilation control is satisfied in step S111.

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

When the ventilation control end determination condition is satisfied (YES in S111), in step S112, the control device 25 notifies a message requesting that the opening be closed on the remote control screen or the like. Then, in step S113, the control device 25 determines whether or not the closing of the opening is completed based on the output of the open/close sensor of the opening. In addition, in order to maintain comfort after ventilation, the user was notified by a remote control display unit that the opening would be closed when sufficient ventilation was achieved, and the opening was closed manually. to close the opening.

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

Furthermore, after the open/close sensor detects that the opening has been closed (YES in S113), the control is such that the augmented operation is performed in all directions for a short period of time but for a certain period of time so that the entire room becomes comfortable. may be added before the process of step S101. However, at this time, unlike during ventilation, it is preferable to return the wind direction to the state before opening the opening.

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

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

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

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

Embodiment 3.
Depending on the placement of the openings, there may be areas in the room that are poorly ventilated. Embodiment 3 will describe control during ventilation when such an area exists.

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

FIG. 20 is a top view for explaining wind direction control during ventilation in the third embodiment. FIG. 21 is a side view for explaining wind direction control during ventilation according to the third embodiment. As shown in FIGS. 20 and 21, an air outlet capable of blowing air to an area 110 facing a 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, it is possible to stir and ventilate the air in areas that are difficult to ventilate.

Some of the air circulates between the hard-to-ventilate area 110 and the air-

conditioning units

20A and 20B, so ventilation efficiency drops, but a certain amount of air also flows to the right side, so ventilation is possible. Therefore, the ventilation efficiency is improved more than the control as in the second embodiment.

It is possible to determine in advance from the floor map which air outlets of which indoor units are to be opened during ventilation.

In addition, in the case of such an indoor configuration, ventilation efficiency is better if a circulator is simply placed 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 so that the circulator power is turned on only during ventilation control.

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

FIG. 22 is a diagram for explaining an example in which the natural wind during ventilation is blocked by the air conditioning system. For example, consider a room 100D with windows on each of two opposing walls. In such a case, it is conceivable that a strong wind blows through from window to window. For example, such a situation is likely to occur on the upper floors of an apartment building.

For example, when the ventilation mode is controlled during the cooling operation, a strong wind blows from the window 104D, and the ventilation direction of the

indoor units

120A and 120B in the ventilation mode is opposite to the natural wind.

If the wind is so strong that the natural air volume is not blocked by the air volume of the indoor unit, it will not be a problem. For example, in environments where strong winds blow in by opening windows, such as in apartments with no shielding around them, simply opening the windows will provide sufficient ventilation, so even if the wind direction and speed of the indoor unit block the natural wind, Not a problem. In order to maintain comfort, the air-conditioning system only needs to be in augmented operation.

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

Therefore, in the present embodiment, the direction of the air blown out from the indoor unit is matched with the passage direction of the natural wind. FIG. 23 is a side view for explaining wind direction control during ventilation according to the fourth embodiment.

As shown in FIG. 23, in the fourth embodiment, wind direction and air volume meters 41E and 42E are provided in the two openings of a room 100E, namely a window 103E and a door 104E. By installing the anemometers 41E and 42E at positions where the wind from the

indoor units

120A and 120B does not directly hit, the direction of the natural wind can be accurately detected.

The control device 25 determines the air blowing direction from the indoor unit based on the wind direction and air volume detected by the anemometers 41E and 42E in addition to the output from the opening/closing sensor. In FIG. 23, the control device 25 controls the wind direction using the wind

direction control units

124A and 124B of the

indoor units

120A and 120B so as to match the main wind flows indicated by the large arrows detected by the anemometers 41E and 42E. to control. As a result, the total amount of air passing through the opening can be increased to increase the amount of ventilation.

In the fourth embodiment, as shown in FIG. 23, a wind vane is installed at the opening and controlled to blow air toward the outlet side of the wind, thereby increasing the amount of ventilation.

It should be noted that the user may be able to select the wind direction of the indoor unit during ventilation even if the wind direction and air volume meter is not attached. For example, in the case of an installation location where the natural wind always blows in the same direction, the wind direction can be manually set in the same direction as the natural wind. If the direction of the wind changes from day to day, the user may be requested to make the setting by outputting a message "Please set the opening where the wind is blowing stronger."

Various modifications.
FIG. 24 is a diagram for explaining a modification of the open/close sensor. In Embodiments 1 to 4, a contact or a temperature sensor installed near the opening is used for recognizing the state of the opening. Alternatively, an infrared sensor installed at a position away from the opening may be used.

For example, an infrared sensor installed in the indoor unit obtains a thermal image that displays the temperature distribution in color, and displays it on a smartphone via communication. At the initial setting, the user designates the position of the opening in the thermal image on the smartphone with a finger touch. By this operation, the position of the opening may be input to the indoor unit from the position of the pixel of the thermal image, and the infrared sensor may detect the temperature change of that portion to detect the opening/closing of the opening.

In this way, it is not necessary to carry out work to install the temperature sensor near the opening.
The method of specifying the opening on the thermal image can be, for example, by touching four points to specify the opening in a rectangular range, or by touching one point and automatically drawing a temperature band of a similar color around the touched point. You may designate it as an opening directly. Also, various designation methods are conceivable, such as designating two openings by touching two locations on the thermal image. Basically, the control is such that the air is blown toward the open area, and if the indoor opening and the outdoor opening are recognized separately, it becomes possible to control the direction of the air in the entire room.

In addition, as for commands regarding the wind direction angles of a plurality of indoor units as shown in FIGS. 15 and 17, settings prepared in advance according to the pattern of the floor map may be set for each indoor unit. In addition, a system controller that manages the control of multiple indoor units is prepared, and the system controller judges and issues a command that instructs the optimum wind direction angle to each indoor unit so that it cooperates with an application that displays the temperature distribution in colors. You may send. Also, 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 which of the control devices 25A to 25D of the indoor units 20A to 20D in FIG. or one may be determined. A wind direction instruction from the representative control device is transmitted to control devices other than the representative control devices 25A to 25D. In that case, the information on the map, the position of the equipment, and the position of the opening is held in the storage unit of the control device managed by the representative. Then, in the representative control device, in the case of the arrangement shown in FIG. 11, etc., the indoor unit 20B on the window side and the indoor unit 20A on the wall side may be determined to indicate different wind directions with respect to the map.

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

Preferably, the air conditioner 2 includes a compressor 11 for circulating the 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. and a fan 23 of . 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 operation mode based on user settings. The first mode is an operation mode in which the air conditioner 2 is made to increase the air conditioning when the opening/closing detection sensor 40 detects that the opening has changed 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 has changed from the closed state to the open state (eco-drive priority).

Preferably, the air conditioner 2 further includes a wind direction changing unit 24 capable of changing the direction of the air sent toward the room 100. When the opening is open, the control device 25 can control the direction of the air sent to the room 100 by the air direction changing unit 24 so as to facilitate ventilation of the room 100. Configured.

More preferably, in the wind direction control, when the room temperature is higher than the outside temperature, the controller 25 controls the wind direction changing unit 24 so as to send air in the first direction toward the opening. If it is lower than , the wind 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 anemometers 41E and 42E that detect the direction of the wind passing through the opening. In the wind direction control, the control device 25 controls the wind direction changer 24 based on the outputs of the wind direction and air volume meters 41E and 42E.

An air conditioning system 1 related to another aspect of the present disclosure includes an open/close detection sensor 40 configured to detect the open/closed state of an opening provided in a room 100, and sucks in the air in the room 100 and air-conditions the air in the room 100. The air conditioner 2 that sends air, the wind direction changing unit 24 that can change the direction of the air that is sent toward the room 100, and the control device 25 that controls the air conditioner 2 according to the output of the open/close detection sensor 40. Prepare. When the open/close 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 as to promote ventilation of the room 100. It is configured to be able to perform wind direction control controlled by the unit 24 .

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

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 unit, 20, 120A, 120B indoor unit, 20A, 20B, 20C, 20D air conditioning unit, 21, 21A, 21B, 21C, 21D expansion valves, 24, 24A, 24B, 24C, 24D wind direction change unit, 29 output unit, 30 remote controller, 33 display unit, 40 open/close detection sensor, 41, 42 open/close sensor, 41E, 42E wind direction and air volume Total, 100, 100A, 100C, 100D, 100E rooms, 103, 103E, 104D windows, 104, 104E doors, 110 areas, 124A, 124B wind direction control unit.

Claims

An air conditioning system for air conditioning a room,
a sensor configured to detect an open/closed state of an opening provided in the room;
an air conditioner that draws air from the room, air-conditions the air, and delivers the air to the room;
A control device that controls the air conditioner according to the output of the sensor,
The air conditioning system, wherein the controller is configured to allow the air conditioner to increase air conditioning when the sensor detects that the opening has changed from a closed state to an open state.
The air conditioner is
a compressor for circulating the refrigerant;
a heat exchanger that exchanges heat between the air in the room and the refrigerant;
a fan for blowing air in the room to the heat exchanger;
2. The air conditioning system of 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 operation mode based on user settings,
The first mode is an operation mode that causes the air conditioner to increase air conditioning when the sensor detects that the opening has changed from a closed state to an open state,
2. The air conditioning system according to claim 1, wherein said second mode is an operation mode in which said air conditioner suppresses air conditioning when said sensor detects that said opening has changed from a closed state to an open state. .
The air conditioner is
further comprising a wind direction changing unit capable of changing the direction of the air delivered toward the room;
The control device can perform wind direction control for controlling the direction of air sent to the room by the wind direction changing unit so as to facilitate ventilation of the room when the opening is in an open state. 2. The air conditioning system of claim 1, wherein the air conditioning system comprises:
In the wind direction control, when the room temperature is higher than the outside temperature, the control device controls the wind direction changing unit to send air in a first direction toward the opening, and the room temperature is higher than the outside temperature. 5. The air conditioning system according to claim 4, wherein, if low, said wind direction changer is controlled to send air in a second direction opposite to said first direction.
Further comprising a wind direction sensor that detects the direction of the wind passing through the opening,
5. The air conditioning system according to claim 4, wherein in said wind direction control, said controller controls said wind direction changing unit based on the output of said wind direction sensor.
An air conditioning system for air conditioning a room,
a sensor configured to detect an open/closed state of an opening provided in the room;
an air conditioner that draws air from the room, air-conditions the air, and delivers the air to the room;
a wind direction changing unit capable of changing the direction of the air sent toward the room;
A control device that controls the air conditioner according to the output of the sensor,
When the sensor detects that the opening has changed from a closed state to an open state, the control device changes the direction of the air delivered to the room so as to facilitate ventilation of the room. An air conditioning system configured to be capable of performing wind direction control controlled by a unit.