Air conditioning ventilation system

Abstract

An air conditioning and ventilation system (100) includes an air conditioning device (1), a ventilation device (50), and a control unit (5). The control unit (5) controls the operation of the air conditioning device (1) and the ventilation device (50). The control unit (5) causes the air conditioning device (1) to perform a compensating operation before causing the ventilation device (50) to perform a ventilation operation. The compensating operation is an operation for compensating for changes in indoor temperature and / or humidity caused by the ventilation operation.

Description

Technical Field

[0001] The invention relates to an air conditioning ventilation system. Background Art

[0002] When a ventilation operation is performed using a ventilator, the temperature and humidity of the air in the air-conditioning space may change due to the outside air supplied to the air-conditioning space during the ventilation.

[0003] To address such a problem, conventionally, an air conditioner is known that controls the air conditioning capacity according to the temperature of the supplied outdoor air when supplying outdoor air to an air-conditioned space, as disclosed in Patent Document 1 (Japanese Patent Application Laid-Open No. 8-145432). Summary of the Invention

[0004] Problems to be solved by the invention

[0005] In the air conditioner described in Patent Document 1, the air conditioning capacity is controlled when outdoor air is supplied. Therefore, the temperature and humidity of the air in the air-conditioned space may temporarily change, which may impair the user's comfort.

[0006] Means for solving problems

[0007] A first aspect of an air conditioning and ventilation system includes an air conditioner, a ventilation device, and a control unit. The control unit controls the operation of the air conditioner and the ventilation device. The control unit causes the air conditioner to perform a compensating operation before causing the ventilation device to perform a ventilation operation. The compensating operation is an operation for compensating for changes in indoor temperature and / or humidity caused by the ventilation operation.

[0008] The control unit of the air conditioning and ventilation system of the first aspect performs a compensating operation to compensate for changes in indoor temperature and / or humidity caused by the ventilation operation. The compensating operation is performed before the ventilation operation. With this configuration, the temperature and / or humidity of the indoor air are pre-adjusted based on the temperature and / or humidity of the air introduced during the ventilation operation. Therefore, even when outdoor air is supplied to the room during the ventilation operation, changes in the temperature and / or humidity of the indoor air are gradual, thereby maintaining user comfort.

[0009] The air conditioning and ventilation system according to the second aspect is the system according to the first aspect, further comprising an indoor environment sensor for detecting an indoor environment. The control unit determines a start timing of the ventilation operation based on a detection value of the indoor environment sensor.

[0010] According to this configuration, the control unit can start the ventilation operation at an appropriate timing.

[0011] The air conditioning and ventilation system according to a third aspect is the system according to the first aspect or the second aspect, further comprising an indoor environment sensor for detecting an indoor environment. The control unit determines a start timing of the compensation operation based on a detection value of the indoor environment sensor.

[0012] According to this configuration, the control unit can start the compensation operation at an appropriate timing.

[0013] A fourth aspect of the air conditioning and ventilation system is the system according to any one of the first to third aspects, further comprising an outdoor sensor for detecting outdoor temperature and / or humidity. The control unit determines the content of the compensation operation based on the detection value of the outdoor sensor.

[0014] According to this configuration, the control unit can determine the content of the compensation operation based on the outdoor temperature.

[0015] According to a fifth aspect, in the air-conditioning and ventilation system according to the second aspect or the third aspect, the control unit determines the start timing of the compensation operation based on the detection value of the indoor environment sensor and the rate of change of the detection value of the indoor environment sensor.

[0016] According to this configuration, the control unit can start the compensation operation at appropriate timing.

[0017] A sixth aspect of the air conditioning and ventilation system is the system according to the second or third aspect, wherein the control unit starts a compensation operation when the detection value of the indoor environment sensor exceeds a second threshold value, and the control unit starts a ventilation operation when the detection value of the indoor environment sensor exceeds a first threshold value that is higher than the second threshold value.

[0018] The air conditioning and ventilation system of the 7th aspect is based on the system of any one of the 1st to 6th aspects, and the compensation operation is based on cooling operation, dehumidification operation or heating operation with a second target temperature that is different from the first target temperature set at the start of the compensation operation by a specified temperature.

[0019] According to an eighth aspect, in the air conditioning and ventilation system according to the fifth or sixth aspect, the control unit terminates the compensation operation based on the start of the ventilation operation. Alternatively, the control unit terminates the compensation operation based on the time elapsed since the start of the compensation operation. Alternatively, the control unit terminates the compensation operation based on a detection value of an indoor environment sensor.

[0020] According to a ninth aspect, the air-conditioning and ventilation system is the system according to any one of the first to eighth aspects, further comprising a notification unit that notifies a user of the start and / or end of the compensation operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of an air conditioning ventilation system.

[0022] Figure 2 This is a diagram schematically showing the overall structure of an air-conditioning ventilation system.

[0023] Figure 3 It is the control block diagram of the air conditioning ventilation system.

[0024] Figure 4 This is a flowchart showing the flow of processing performed by the control unit during the compensation operation and the ventilation operation.

[0025] Figure 5 This is a schematic diagram of an air conditioning ventilation system. DETAILED DESCRIPTION

[0026] The following describes embodiments of the air conditioning and ventilation system disclosed herein, with appropriate reference to the accompanying drawings. However, unnecessary detailed descriptions may be omitted. For example, detailed descriptions of well-known matters and repetitive descriptions of substantially identical structures may be omitted. This is to avoid unnecessary redundancy and to facilitate understanding by those skilled in the art.

[0027] In addition, each figure is not necessarily a strictly illustrated figure. In addition, in each figure, the same figure number is attached to the substantially same structure, and the repeated description is omitted or simplified.

[0028] <First embodiment>

[0029] (1) Overall structure

[0030] First, refer to Figure 1 The air-conditioning and ventilation system 100 will be described. Figure 1 This is a diagram schematically showing an air conditioning and ventilation system 100 according to this embodiment. The air conditioning and ventilation system 100 is a system that stabilizes temperature changes in an indoor space IS (equivalent to the "indoor" described in the technical proposal) by performing a compensation operation before ventilation operation. The air conditioning and ventilation system 100 mainly includes an air conditioner 1, a ventilation device 50, an indoor environment sensor 60, and an outdoor sensor 70 (see FIG. 1 ). Figure 1 The air conditioner 1 is a device capable of performing a compensation operation. The ventilation device 50 is a device capable of performing a ventilation operation. The indoor environment sensor 60 is a sensor unit capable of detecting the environment of the indoor space IS. In this embodiment, the indoor environment sensor 60 is built into the controller 86. The outdoor sensor 70 is a sensor unit capable of detecting the outdoor temperature.

[0031] Furthermore, in this embodiment, the air conditioner 1 includes a first wireless LAN adapter 101, the ventilation device 50 includes a second wireless LAN adapter 102, and the controller 86 includes a third wireless LAN adapter 103. This enables the air conditioning control unit 9, the ventilation control unit 77, and the control unit 5, which will be described later, to communicate wirelessly via the wireless LAN router 210. The air conditioning control unit 9, the ventilation control unit 77, and the control unit 5 can exchange control signals, information, and the like with each other through wireless communication.

[0032] (2) Detailed structure

[0033] (2-1) Air conditioning unit

[0034] Reference Figure 1 and Figure 2 The air conditioning apparatus 1 will be described. Figure 2 This diagram schematically illustrates the overall configuration of an air conditioning and ventilation system 100. The air conditioning device 1 is a device that performs cooling, heating, and dehumidification operations to condition the indoor space IS. Furthermore, the air conditioning device 1 of this embodiment is capable of performing a boost operation. Hereinafter, the state in which the air conditioning device 1 performs a boost operation will sometimes be referred to as a boost operation mode. Hereinafter, the state in which the air conditioning device 1 performs operations other than the boost operation will sometimes be referred to as a normal operation mode.

[0035] like Figure 1 and Figure 2 As shown, the air conditioning apparatus 1 mainly includes an outdoor unit 10 installed in an outdoor space OS (equivalent to the "outdoor" described in the technical proposal) and an indoor unit 20 installed on a wall WL or the like in an indoor space IS. The outdoor unit 10 and the indoor unit 20 are connected by refrigerant communication pipes 11 and 12. In the air conditioning apparatus 1, the outdoor unit 10 and the indoor unit 20 are connected by the refrigerant communication pipes 11 and 12, thereby forming a refrigerant circuit 13 (see Figure 2 In the air conditioning apparatus 1, a vapor compression refrigeration cycle is performed in which the refrigerant sealed in the refrigerant circuit 13 is compressed, condensed, decompressed, evaporated, and then compressed again.

[0036] The operation of the air-conditioning device 1 is controlled by an air-conditioning control unit 9. The air-conditioning control unit 9 is configured by connecting an outdoor control unit 10a and an indoor control unit 20a via a transmission line 8a, for example.

[0037] (2-1-1) Outdoor Unit

[0038] The outdoor unit 10 is a device installed in the outdoor space OS and mainly includes a compressor 14, a four-way switching valve 15, an accumulator 16, an outdoor heat exchanger 17, an outdoor fan 18, an electric expansion valve 19, and an outdoor control unit 10a.

[0039] The compressor 14 draws refrigerant from the suction pipe through the suction port and compresses the drawn refrigerant. The compressed refrigerant is discharged from the discharge port of the compressor 14. The refrigerant discharged from the compressor 14 is sent to the first port 15a of the four-way switching valve 15 through the discharge pipe.

[0040] The four-way switching valve 15 is a mechanism for switching the flow direction of the refrigerant. When the air conditioner 1 performs cooling operation, the four-way switching valve 15 allows the refrigerant to flow between the first port 15a and the second port 15b, and at the same time allows the refrigerant to flow between the third port 15c and the fourth port 15d (see Figure 2 When the air conditioner 1 performs heating operation, the four-way switching valve 15 allows the refrigerant to flow between the first port 15a and the fourth port 15d, and simultaneously allows the refrigerant to flow between the second port 15b and the third port 15c (see Figure 2 dashed line).

[0041] In addition, an accumulator 16 is provided in the suction pipe connecting the third port 15c of the four-way switching valve 15 and the suction port of the compressor 14. In the accumulator 16, the refrigerant flowing from the third port 15c of the four-way switching valve 15 to the compressor 14 is separated into gas refrigerant and liquid refrigerant. The gas refrigerant is mainly supplied from the accumulator 16 to the suction port of the compressor 14.

[0042] The outdoor heat exchanger 17 exchanges heat between the outdoor air and the refrigerant. During cooling operation, the outdoor heat exchanger 17 functions as a refrigerant condenser. During heating operation, the outdoor heat exchanger 17 functions as a refrigerant condenser. In this embodiment, the outdoor heat exchanger 17 is, for example, a fin-and-tube heat exchanger having a plurality of heat transfer tubes and a plurality of heat transfer fins.

[0043] The outdoor fan 18 is a blower that generates a flow of outdoor air that flows into the outdoor unit 10, passes through the outdoor heat exchanger 17, and then flows out of the outdoor unit 10. In this embodiment, the outdoor fan 18 is, for example, a propeller fan. However, the outdoor fan 18 is not limited to a propeller fan and may be any suitable type.

[0044] The electric expansion valve 19 is a valve used to adjust the refrigerant pressure and refrigerant flow rate between the outdoor heat exchanger 17 and the indoor heat exchanger 21. In this embodiment, the electric expansion valve 19 is used as the expansion mechanism, but the expansion mechanism is not limited to this as long as it can adjust the refrigerant pressure and refrigerant flow rate.

[0045] The outdoor control unit 10 a controls the operation of each component constituting the outdoor unit 10 .

[0046] The outdoor control unit 10a is implemented by a microcomputer, a memory, etc. The microcomputer includes a control operation device and a storage device. The control operation device can use a processor such as a CPU or a GPU. The control operation device reads out a program stored in the storage device and performs a predetermined operation process according to the program. Furthermore, the control operation device can write the operation result to the storage device or read out the information stored in the storage device according to the program. The outdoor control unit 10a is electrically connected to the compressor 14, the four-way switching valve 15, the outdoor fan 18, the electric expansion valve 19, etc. of the outdoor unit 10 in a manner that can transmit and receive control signals, information, etc. In addition, the outdoor control unit 10a is connected to the indoor control unit 20a via a transmission line 8a in a manner that can transmit and receive control signals, information, etc. By connecting the outdoor control unit 10a and the indoor control unit 20a, an air-conditioning control unit 9 that controls the operation of the air-conditioning device 1 is formed.

[0047] (2-1-2) Indoor unit

[0048] like Figure 1 As shown, the indoor unit 20 of this embodiment is a wall-mounted indoor unit. However, the type of indoor unit 20 is not limited to this. For example, the indoor unit 20 may be a type installed on the ceiling or floor. The indoor unit 20 mainly includes an indoor heat exchanger 21, an indoor fan 22, and an indoor control unit 20a.

[0049] The indoor heat exchanger 21 is a device that performs heat exchange between indoor air and refrigerant. During cooling operation, the indoor heat exchanger 21 functions as an evaporator for the refrigerant, cooling the indoor air. During heating operation, the indoor heat exchanger 21 functions as a condenser for the refrigerant, heating the indoor air. In this embodiment, the indoor heat exchanger 21 is, for example, a fin-and-tube heat exchanger having multiple heat transfer tubes and multiple heat transfer fins.

[0050] The indoor fan 22 is a blower that draws indoor air into the indoor unit 20 and supplies the air, which has undergone heat exchange with the refrigerant in the indoor heat exchanger 21, back into the room. In this embodiment, the indoor fan 22 is a crossflow fan that is driven to generate airflow in a direction intersecting the rotation axis. However, the indoor fan 22 is not limited to a crossflow fan; any suitable fan may be selected.

[0051] The indoor control unit 20 a controls the operation of each component constituting the indoor unit 20 .

[0052] The indoor control unit 20a is implemented by a microcomputer, a memory, and the like. The microcomputer includes a control operation device and a storage device. The control operation device can use a processor such as a CPU or a GPU. The control operation device reads a program stored in the storage device and performs predetermined operations according to the program. Furthermore, the control operation device can write the operation results to the storage device or read information stored in the storage device according to the program. The indoor control unit 20a is electrically connected to the indoor fan 22 and the like in a manner that enables transmission and reception of control signals, information, and the like. In addition, the indoor control unit 20a is connected to the outdoor control unit 10a of the outdoor unit 10 via a transmission line 8a in a manner that enables transmission and reception of control signals, information, and the like. By connecting the indoor control unit 20a and the outdoor control unit 10a, an air conditioning control unit 9 that controls the operation of the air conditioning device 1 is formed. In addition, the indoor control unit 20a and the outdoor control unit 10a can also be connected wirelessly in a communicative manner instead of being connected by a physical transmission line 8a.

[0053] The indoor control unit 20a is also configured to receive various signals transmitted from the remote controller 25 for operating the indoor unit 20. These signals include signals related to the operation / stop of the indoor unit 20 and signals related to various settings. Signals related to various settings include, for example, signals for switching operating modes and target temperatures for cooling and heating operations.

[0054] In addition, the indoor unit 20 of this embodiment has a built-in first wireless LAN adapter 101 (see Figure 1 The indoor control unit 20 a can communicate with the wireless LAN router 210 by using the first wireless LAN adapter 101 .

[0055] (2-2) Ventilation device

[0056] The ventilation device 50 is a device that ventilates the indoor space IS by performing a ventilation operation described later. Figure 1 As shown in FIG, the ventilator 50 of this embodiment is attached to the wall WL of the indoor space IS. However, the ventilator 50 may be installed on the ceiling or the floor of the indoor space IS.

[0057] The ventilation device 50 of this embodiment primarily comprises a ventilation fan 56 for generating an air flow for supplying air; a ventilation fan motor (not shown) for driving the ventilation fan 56; and a ventilation control unit 77 for controlling the start and stop of the ventilation fan motor and the rotation speed (air volume). The configuration of the ventilation device 50 is not limited to this; the ventilation device 50 may also include, for example, a total heat exchanger or an active species generator.

[0058] The ventilation control unit 77 includes a microcomputer, a memory, and the like for controlling the operation of each component constituting the ventilation device 50 .

[0059] Furthermore, the ventilation device 50 of this embodiment has a built-in second wireless LAN adapter 102 (see Figure 1 The ventilation control unit 77 can communicate with the wireless LAN router 210 by using the second wireless LAN adapter 102 .

[0060] (2-3) Controller

[0061] The controller 86 is a device installed in the indoor space IS and mainly includes the indoor environment sensor 60 , the notification unit 23 , and the control unit 5 .

[0062] The indoor environment sensor 60 is a sensor unit capable of detecting the environment of the indoor space IS. The indoor environment sensor 60 of this embodiment is a CO 2 sensor capable of detecting the CO 2 concentration in the indoor space IS. The CO 2 concentration detected by the indoor environment sensor is transmitted to the control unit 5 .

[0063] The control unit 5 is implemented by a microcomputer, a memory, etc. The control unit 5 includes a control operation device and a storage device. The control operation device of the control unit 5 can use a processor such as a CPU or a GPU. The control operation device of the control unit 5 can read out a program stored in the storage device and perform a predetermined operation process according to the program. Furthermore, the control operation device can write the operation result to the storage device according to the program, or read out the information stored in the storage device. The storage device can be used as a database. The control unit 5 of this embodiment controls the operation of the air conditioning device 1 and the ventilation device 50 by sending and receiving control signals, information, etc. with the air conditioning control unit 9 and the ventilation control unit 77.

[0064] The notification unit 23 is a device that notifies the user of the start and end of the compensation operation. In this embodiment, the notification unit 23 is, for example, a speaker built into the controller 86. However, the example of the notification unit 23 is not limited to this. For example, the remote control 25 having the display unit 250 may also function as the notification unit.

[0065] In addition, the controller 86 of this embodiment has a built-in third wireless LAN adapter 103 (see Figure 1 The control unit 5 can communicate with the wireless LAN router 210 by using the third wireless LAN adapter 103 .

[0066] (2-4) Outdoor sensor

[0067] like Figure 1As shown, the outdoor sensor 70 is a sensor unit located in the outdoor space OS. The outdoor sensor 70 is capable of detecting the temperature of the outdoor space OS. The outdoor sensor 70 is connected to the controller 86 via a transmission line 8b, enabling transmission and reception of various signals and information. The temperature of the outdoor space OS detected by the outdoor sensor 70 is transmitted to the control unit 5 of the controller 86 via the transmission line 8b.

[0068] (3) Ventilation operation and compensation operation

[0069] Hereinafter, the ventilation operation performed by the ventilator 50 and the compensation operation performed by the air-conditioning apparatus 1 will be described in detail.

[0070] (3-1) Ventilation Operation

[0071] The ventilation operation is an operation in which air from the outdoor space OS is supplied to the indoor space IS by the ventilation device 50. By performing the ventilation operation, the CO 2 concentration in the indoor space IS is reduced.

[0072] In this embodiment, the start timing of the ventilation operation is determined by the control unit 5. The control unit 5 determines the start timing of the ventilation operation based on the detection value of the indoor environment sensor 60. For example, the control unit 5 starts the ventilation operation when the detection value detected by the CO2 sensor, i.e., the indoor environment sensor 60, exceeds the first threshold value. In addition, the first threshold value is a numerical value related to the CO2 concentration, and is 1000 ppm in this case. Therefore, the control unit 5 of this embodiment starts the ventilation operation when the indoor CO2 concentration exceeds 1000 ppm. The control unit 5 that has determined the start timing of the ventilation operation sends a control signal to the ventilation control unit 77 so that the ventilation operation starts at the start timing.

[0073] The ventilation operation of this embodiment is continued until the CO2 concentration in the room decreases to a predetermined concentration. For example, the ventilation operation is continued until the CO2 concentration in the room becomes less than 800 ppm.

[0074] As described above, the ventilation operation supplies air from the outdoor space OS (outside air) to the indoor space IS. The outside air supplied to the indoor space IS may be hotter or colder than the indoor air. For example, when the air conditioner 1 is in cooling operation (during the cooling season), the ventilation operation may supply hot outside air to the indoor space IS. Alternatively, when the air conditioner 1 is in heating operation (during the heating season), the ventilation operation may supply cold outside air to the indoor space IS. Supplying hot or cold outside air to the indoor space IS may impair the comfort of users in the indoor space IS.

[0075] (3-2) Compensation Operation

[0076] Compensation operation is performed before ventilation operation. Compensation operation is used to compensate for changes in indoor temperature caused by ventilation operation. By performing compensation operation, changes in indoor air temperature accompanying ventilation operation are smoothed.

[0077] In the present embodiment, the content of the compensation operation is determined by the control unit 5. The control unit 5 determines the content of the compensation operation based on the detection value of the outdoor sensor 70. For example, the control unit 5 determines the second target temperature based on the detection value of the outdoor sensor 70. The second target temperature is a target temperature that is different from the first target temperature set at the start of the compensation operation (immediately before the start). The compensation operation is performed based on the second target temperature. In addition, the first target temperature is substantially the same temperature as the target temperature set in the normal operation mode. Therefore, it can be interpreted that the compensation operation is an operation performed before the ventilation operation, and is an operation performed based on a target temperature that is different from the target temperature set in the normal operation mode by a specified temperature.

[0078] For example, let's assume that the outdoor temperature detected by the outdoor sensor 70 is 35°C, and the target temperature set for the air conditioner 1 at the start of the compensation operation is 27°C (the first target temperature is 27°C). In this way, when there is a possibility that the temperature of the indoor air will rise due to the ventilation operation, the control unit 5 performs the compensation operation by performing a cooling operation based on a target temperature that is a predetermined temperature lower than the first target temperature (for example, 24°C). Alternatively, let's assume that the outdoor temperature detected by the outdoor sensor 70 is 5°C, and the target temperature set for the air conditioner 1 at the start of the compensation operation is 20°C. In this way, when there is a possibility that the temperature of the indoor air will fall due to the ventilation operation, the control unit 5 performs the compensation operation by performing a heating operation based on a target temperature that is a predetermined temperature higher than the first target temperature (for example, 23°C). Note that these numerical values are merely examples and can be changed as appropriate.

[0079] The start timing of the compensation operation is determined by the control unit 5. The control unit 5 determines the start timing of the ventilation operation based on the detection value of the indoor environment sensor 60. Specifically, the control unit 5 determines the start timing of the compensation operation based on the CO2 concentration detected by the indoor environment sensor 60 and the rate of change of the CO2 concentration. For example, if the CO2 concentration in the indoor space IS is predicted to exceed the first threshold value in 10 minutes, the control unit 5 determines to execute the compensation operation in 5 minutes. These numerical values are merely examples and can be modified as appropriate.

[0080] The control unit 5 of this embodiment uses the indoor CO2 concentration exceeding the second threshold as a trigger, and predicts that the indoor CO2 concentration will exceed the first threshold in a few minutes based on the rate of change of the CO2 concentration (the ventilation operation will start in a few minutes). In addition, the second threshold is a numerical value related to the CO2 concentration, for example, 950 ppm in this case. The rate of change of the CO2 concentration can be calculated by confirming the transition of the CO2 concentration in the indoor space IS. For example, the storage device of the control unit 5 of this embodiment pre-stores a program for the control unit 5 to confirm the detection value (CO2 concentration) of the indoor environment sensor 60 every 5 minutes. The CO2 concentration referenced by the control unit 5 is stored in the storage device of the control unit 5 in chronological order. As a result, the storage device of the control unit 5 stores the CO2 concentration 5 minutes ago, the CO2 concentration 10 minutes ago, the CO2 concentration 15 minutes ago, etc. The control unit 5 can calculate the rate of change of the CO2 concentration by performing predetermined operations based on these data.

[0081] The control unit 5 that has determined the start timing of the compensation operation transmits a control signal to the air-conditioning control unit 9 so as to start the compensation operation at the start timing.

[0082] In addition, the compensation operation of this embodiment ends based on the start of the ventilation operation. For example, the compensation operation ends at the same time as the start of the ventilation operation.

[0083] In addition, the control unit 5 may restart the normal operation mode after the compensation operation mode ends.

[0084] (4) Operation of the air conditioning ventilation system

[0085] Next, the operation of the air conditioning and ventilation system 100 of this embodiment will be described. The air conditioning and ventilation system 100 receives the operation instruction from the user and is controlled by the control unit 5. Figure 4 The following refers to the process shown in the flowchart. Figure 4 The flowchart shown in FIG. 1 illustrates the operation of the air conditioning ventilation system 100. Figure 4 The flowchart shown is merely an example and may be modified as appropriate within a consistent range. For example, other steps not shown may be included before or after each step, and the order of each step may be modified as appropriate within a consistent range.

[0086] In step S1, the air-conditioning ventilation system 100 starts the operation of the air-conditioning apparatus 1. Specifically, the normal operation mode is started.

[0087] In step S2, the air-conditioning and ventilation system 100 checks the detection value of the indoor environment sensor 60. Specifically, the air-conditioning and ventilation system 100 checks the CO2 concentration in the indoor space IS.

[0088] In step S3, the air conditioning and ventilation system 100 determines whether the CO2 concentration in the indoor space IS is greater than or equal to the second threshold. If the CO2 concentration in the indoor space IS is greater than or equal to the second threshold, the air conditioning and ventilation system 100 proceeds to step S4. If the CO2 concentration in the indoor space IS is less than the second threshold, the air conditioning and ventilation system 100 returns to step S2.

[0089] In step S4 , the air-conditioning and ventilation system 100 determines the start timing of the compensation operation based on the rate of change of the CO 2 concentration in the indoor space IS.

[0090] In step S5, the air-conditioning and ventilation system 100 checks the detection value of the outdoor sensor 70. Specifically, the air-conditioning and ventilation system 100 checks the temperature of the outdoor air.

[0091] In step S6 , the air conditioning and ventilation system 100 determines the content of the compensation operation based on the detection value of the outdoor sensor 70 .

[0092] In step S7, the air conditioning system 100 compares the start timing determined in step S4 with the current time. When the current time matches the start timing determined in step S4, the air conditioning system 100 starts the compensation operation. Furthermore, in step S7, the notification unit 23 notifies the user of the start of the compensation operation.

[0093] In step S8, the air conditioning and ventilation system 100 determines whether the CO2 concentration in the indoor space IS is above a first threshold value based on the detection value of the indoor environment sensor 60. If the CO2 concentration in the indoor space IS is above the first threshold value, the air conditioning and ventilation system 100 proceeds to step S9. If the CO2 concentration in the indoor space IS is below the first threshold value, the air conditioning and ventilation system 100 continues the compensation operation until the CO2 concentration in the indoor space IS reaches above the first threshold value.

[0094] In step S9, the air conditioning and ventilation system 100 ends the compensation operation and starts the ventilation operation. In step S9, the notification unit 23 notifies the user of the end of the compensation operation.

[0095] In step S10, the air conditioning and ventilation system 100 checks whether the indoor CO2 concentration is less than a specified value. If the indoor CO2 concentration is less than the specified value, the air conditioning and ventilation system 100 proceeds to step S11. If the indoor CO2 concentration is above the specified value, the air conditioning and ventilation system 100 continues ventilation operation until the indoor CO2 concentration is less than the specified value.

[0096] In step S11 , the air-conditioning and ventilation system 100 ends the ventilation operation.

[0097] In this manner, the air conditioning and ventilation system 100 operates. The air conditioning and ventilation system 100 that has performed the operation in step S11 may repeat the operations from step S2 to step S11 until receiving an operation end instruction from the user.

[0098] (5) Characteristics

[0099] When a ventilation operation is performed using a ventilator, the temperature of the air in the air-conditioning space may change due to the outside air supplied to the air-conditioning space accompanying the ventilation.

[0100] To address such a problem, conventionally, there is known an air conditioner as disclosed in Patent Document 1 that controls the air conditioning capacity according to the temperature of the supplied outdoor air when supplying outdoor air to an air-conditioned space.

[0101] However, in the air conditioner described in Patent Document 1, air conditioning capacity is controlled while outdoor air is being supplied. Consequently, the temperature of the air-conditioned space temporarily fluctuates, potentially impairing user comfort. In particular, the temperature of the air-conditioned space may fluctuate significantly immediately after the start of outdoor air supply.

[0102] (5-1)

[0103] The air conditioning and ventilation system 100 of this embodiment includes an air conditioning unit 1, a ventilation unit 50, and a control unit 5. The control unit 5 controls the operation of the air conditioning unit 1 and the ventilation unit 50. Before the ventilation unit 50 performs the ventilation operation, the control unit 5 causes the air conditioning unit 1 to perform a compensating operation. The compensating operation is an operation to compensate for changes in indoor temperature caused by the ventilation operation.

[0104] The controller 5 of the air conditioning and ventilation system 100 of this embodiment performs a compensating operation to compensate for changes in indoor temperature caused by the ventilation operation. This compensating operation is performed before the ventilation operation. With this configuration, the indoor air temperature is pre-adjusted based on the temperature of the air introduced during the ventilation operation. Therefore, even when outdoor air is supplied to the indoor space IS during the ventilation operation, changes in indoor air temperature are gradual, thereby maintaining user comfort.

[0105] (5-2)

[0106] As mentioned above, the execution of ventilation operation may cause the indoor air temperature to fluctuate. Therefore, from the perspective of stabilizing the indoor air temperature, it is preferable to perform ventilation operation less frequently. However, Patent Document 1 does not provide detailed research on the timing of performing ventilation operation. Therefore, the air conditioner of Patent Document 1 may perform ventilation operation at a time when ventilation operation is not necessary.

[0107] The air conditioning and ventilation system 100 of this embodiment further includes an indoor environment sensor 60 for detecting the indoor environment. The control unit 5 determines the start timing of the ventilation operation based on the detection value of the indoor environment sensor 60.

[0108] According to this configuration, the control unit 5 can start the ventilation operation at an appropriate timing. Therefore, the frequency of temperature changes in the indoor air can be suppressed to a minimum, thereby achieving stabilization of the indoor air temperature.

[0109] Furthermore, by stabilizing the temperature of the indoor air, the user's comfort can be maintained.

[0110] (5-3)

[0111] The air conditioning and ventilation system 100 of this embodiment further includes an indoor environment sensor 60 for detecting the indoor environment. The control unit 5 determines the start timing of the compensation operation based on the detection value of the indoor environment sensor 60.

[0112] According to this configuration, the control unit 5 can start the compensation operation at an appropriate timing.

[0113] (5-4)

[0114] The air conditioning and ventilation system 100 of this embodiment further includes an outdoor sensor 70 for detecting the outdoor temperature. The control unit 5 determines the content of the compensation operation based on the detection value of the outdoor sensor 70.

[0115] According to this configuration, the control unit 5 can determine the content of the compensation operation based on the outdoor temperature.

[0116] (5-5)

[0117] The indoor environment changes due to various factors. Therefore, if the start timing of the boost operation is uniformly determined, the boost operation duration may be excessively long or insufficient. Excessively long boost operation duration may lead to increased power consumption. Furthermore, if the boost operation duration is insufficient, the supply of outdoor air may begin when the air temperature in the indoor space IS is insufficiently adjusted.

[0118] In the air-conditioning and ventilation system 100 of the present embodiment, the control unit 5 determines the start timing of the compensation operation based on the detection value of the indoor environment sensor 60 and the rate of change of the detection value of the indoor environment sensor 60 .

[0119] According to this configuration, the control unit 5 can start the compensation operation at an appropriate timing. Specifically, the control unit 5 can start the compensation operation at a timing that the operation time of the compensation operation does not become too long. In addition, the control unit 5 can start the compensation operation at a timing that the operation time of the compensation operation does not become insufficient.

[0120] (5-6)

[0121] In the air conditioning and ventilation system 100 of the present embodiment, the compensation operation is a cooling operation or a heating operation based on a second target temperature that is different by a predetermined temperature from a first target temperature set at the start of the compensation operation.

[0122] According to this configuration, the compensation operation can be performed at a target temperature that is higher or lower than the target temperature set at the start of the compensation operation.

[0123] (5-7)

[0124] In the air-conditioning ventilation system 100 of the present embodiment, the control unit 5 ends the compensation operation based on the start of the ventilation operation.

[0125] (5-8)

[0126] The air conditioning and ventilation system 100 of the present embodiment further includes a notification unit 23 for notifying the user of the start and end of the compensation operation.

[0127] (6) Modification

[0128] The following describes modified examples of the above embodiment. The modified examples can be appropriately combined within the scope of non-inconsistency.

[0129] (6-1) Modification 1A

[0130] In the above embodiment, the controller 5 has been described as causing the air conditioner 1 to perform a compensating operation to smooth changes in the indoor air temperature caused by ventilation operation. However, examples of compensating operation are not limited to this. For example, if there is a possibility that high-humidity outdoor air will be supplied to the indoor space IS due to ventilation operation, the following operation may be performed.

[0131] (6-1-1)

[0132] For example, the control unit 5 can also make the change of the indoor air humidity caused by the ventilation operation smooth by making the air conditioner 1 perform the compensation operation. In this modification, the dehumidification operation can also be performed during the compensation operation. Here, the outdoor sensor 70 can also be a sensor for detecting the outdoor humidity.

[0133] The air-conditioning and ventilation system of this modification can make the humidity of the indoor air change gradually even when outdoor air is supplied to the indoor space IS during the ventilation operation, thereby maintaining the user's comfort.

[0134] (6-1-2)

[0135] For example, the control unit 5 can also smooth the changes in indoor temperature and humidity caused by ventilation operation by causing the air conditioner 1 to perform compensating operation. During the compensating operation of this variation, cooling operation, heating operation, and dehumidification operation can also be performed. For example, during the compensating operation of this variation, cooling operation can be performed for a predetermined time after performing dehumidification operation for a predetermined time. Here, the outdoor sensor 70 can also be a sensor that detects outdoor temperature and humidity.

[0136] The air-conditioning and ventilation system of this modification can make the temperature and humidity changes of the indoor air gentle even when outdoor air is supplied to the indoor space IS during the ventilation operation, thereby maintaining the user's comfort.

[0137] (6-2) Modification 1B

[0138] In the above embodiment, an example is described in which the control unit 5 determines the start timing of the compensation operation based on the detection value of the indoor environment sensor 60 and the rate of change of the detection value of the indoor environment sensor 60. However, the control example performed by the control unit 5 is not limited to the above example. For example, the control unit 5 may start the compensation operation when the detection value of the indoor environment sensor 60 exceeds the second threshold value, and start the ventilation operation when the detection value of the indoor environment sensor 60 exceeds the first threshold value higher than the second threshold value.

[0139] For example, assuming that the second threshold value is 950 ppm and the first threshold value is 1000 ppm, the controller 5 starts the compensation operation when the CO2 concentration exceeds 950 ppm and starts the ventilation operation when the CO2 concentration exceeds 1000 ppm.

[0140] (6-3) Modification 1C

[0141] In the above embodiment, the control unit 5 has been described as terminating the compensation operation simultaneously with the start of the ventilation operation. However, the control example performed by the control unit 5 is not limited to this example. The control unit 5 may also terminate the compensation operation after a predetermined time has elapsed from the start of the ventilation operation. In this case, the control unit 5 may also confirm whether the predetermined time has elapsed since the start of the ventilation operation by measuring using a timer (not shown).

[0142] Alternatively, the control unit 5 may terminate the compensation operation based on the time elapsed since the start of the compensation operation. More specifically, the compensation operation may be terminated after a predetermined time has elapsed since the start of the compensation operation. In this case, the control unit 5 may also confirm whether the predetermined time has elapsed since the start of the compensation operation by measuring using a timer (not shown).

[0143] Alternatively, the control unit 5 may end the compensation operation based on the detection value of the indoor environment sensor 60. For example, the control unit 5 may end the compensation operation if the detection value of the indoor environment sensor 60 does not increase after a predetermined time has passed since the start of the compensation operation.

[0144] (6-4) Modification 1D

[0145] In the above embodiment, a paired air conditioner 1 is described in which one outdoor unit and one indoor unit are connected in parallel via refrigerant communication pipes 11 and 12. However, the structure of the air conditioner is not limited to this. For example, the air conditioner may also be a multi-type air conditioner 1a in which one outdoor unit 10 is connected to a plurality of indoor units 20 (see FIG. Figure 5 ).

[0146] In addition, in the above embodiment, the ventilation device 50 is described as being connected to the outdoor space OS. However, the structure of the ventilation device is not limited thereto. For example, the ventilation device 50 may also include a device body 51 connected to the following parts: an intake duct 107 connected to an intake port 107a for taking outdoor air into the indoor space IS; an air supply duct 108 connected to an air supply port 108a for supplying outdoor air to the indoor space IS; an exhaust duct 109 connected to an exhaust port 109a for extracting indoor air from the indoor space IS; and an exhaust duct 110 connected to an exhaust port 110a for exhausting indoor air to the outdoor space OS (see FIG. 1 ). Figure 5 ).

[0147] (6-5) Modification 1E

[0148] In the above embodiment, an example is described in which the air conditioning and ventilation system 100 includes an indoor environment sensor 60, and the control unit 5 of the air conditioning and ventilation system 100 determines the start timing of the compensation operation based on the detection value of the indoor environment sensor 60 and the rate of change of the detection value of the indoor environment sensor 60. Furthermore, in the above embodiment, an example is described in which the control unit 5 starts the ventilation operation when the CO2 concentration detected by the indoor environment sensor 60 exceeds the first threshold value. However, the structure of the air conditioning and ventilation system 100 is not limited to this, and the air conditioning and ventilation system may not include the indoor environment sensor 60, for example. In this case, the start timings of the compensation operation and the ventilation operation may be pre-stored in the storage device of the control unit 5.

[0149] For example, the storage device of the control unit 5 may store a program that causes the ventilation device 50 to perform a ventilation operation every time a predetermined time period has elapsed. More specifically, the storage device of the control unit 5 may store a program that causes the ventilation operation to be performed once every hour. Furthermore, the storage device of the control unit 5 may store a program that causes the ventilation device 50 to perform a compensation operation 10 minutes before the ventilation operation.

[0150] Furthermore, the execution time of the ventilation operation (for example, 10 minutes) and the execution time of the compensation operation (for example, 5 minutes) may be stored in advance in the storage device of the control unit 5 .

[0151] The air-conditioning and ventilation system of this modification does not include the indoor environment sensor 60. Therefore, the manufacturing cost of the air-conditioning and ventilation system is reduced.

[0152] (6-6) Modification 1F

[0153] In the above embodiment, the air conditioning and ventilation system 100 is equipped with an indoor environment sensor 60, and the control unit 5 of the air conditioning and ventilation system 100 determines the start timing of the compensation operation based on the detection value of the indoor environment sensor 60 and the rate of change of the detection value of the indoor environment sensor 60. However, the configuration of the air conditioning and ventilation system 100 is not limited to this. For example, the air conditioning and ventilation system 100 may be equipped with a human presence sensor capable of detecting the number of users present in the indoor space IS in place of the indoor environment sensor 60. In this case, the control unit 5 may also roughly calculate the CO2 concentration in the indoor space IS based on the number of users present in the indoor space IS, the length of stay of each user in the indoor space IS, the floor area of the indoor space IS, and the like. Furthermore, the start timing of the compensation operation and ventilation operation may also be determined based on the CO2 concentration in the indoor space IS calculated by the control unit 5.

[0154] Alternatively, the air conditioning and ventilation system may include a human presence sensor in addition to the indoor environment sensor 60. In this case, the control unit 5 may also take into account the number of users present in the indoor space IS when calculating the rate of change of the detection value of the indoor environment sensor 60. This configuration allows the rate of change of the detection value of the indoor environment sensor 60 to be corrected according to the increase or decrease in the number of users present in the indoor space IS. Consequently, the compensation operation can be initiated at a more appropriate timing.

[0155] (6-7) Modification 1G

[0156] In the above embodiment, the ventilation device 50 is installed in the indoor space IS and performs ventilation operation. However, the structure of the air conditioning system 100 is not limited to this. For example, the ventilation device 50 may be integrated with the air conditioning device.

[0157] The air conditioning apparatus of this modified example may also include, for example, an outdoor unit having a ventilation device 50 and an intake and exhaust hose. The intake and exhaust hose connects the indoor space IS to the outdoor unit and serves as a ventilation path for the air flow generated by the ventilation device 50. The air conditioning apparatus can supply outdoor air to the indoor space IS via the intake and exhaust hose by driving the ventilation device 50 included in the outdoor unit.

[0158] (6-8) Modification 1H

[0159] In the above embodiment, an example is described in which the controller 86 includes the control unit 5. However, the structure of the air conditioning and ventilation system 100 is not limited to this. For example, the air conditioning device 1 and the ventilation device 50 may also include the control unit 5. In addition, the control unit 5 may not have some or all of the functions described in the above embodiment. For example, some or all of the functions of the control unit 5 described in the above embodiment may also be implemented by a server or the like that is set in a place different from the air conditioning and ventilation system. In other words, the functions of the control unit 5 may not only be performed by the air conditioning and ventilation system, but may also be implemented by a server or the like that is set separately from the air conditioning and ventilation system and is not shown in the figure.

[0160] (6-9) Modification 1I

[0161] In the above embodiment, the air conditioning control unit 9, the ventilation control unit 77, and the control unit 5 are described as performing wireless communication via the wireless LAN router 210, thereby exchanging control signals and information with each other. However, the structure of the air conditioning and ventilation system is not limited to this. For example, the air conditioning control unit 9, the ventilation control unit 77, and the control unit 5 may also be connected via a physical wired connection (communication line). Alternatively, the air conditioning control unit 9, the ventilation control unit 77, and the control unit 5 may also exchange control signals and information with each other via a physical wired connection.

[0162] <Other Implementation Methods>

[0163] While the embodiments of the present disclosure have been described above, it should be understood that various modifications may be made to the embodiments and details without departing from the spirit and scope of the claims.

[0164] The present disclosure is not directly limited to the above-mentioned embodiments. The present disclosure can be embodied by deforming the constituent elements in the implementation stage without departing from its main purpose. In addition, the present disclosure can form various disclosures by appropriate combinations of multiple constituent elements disclosed in the above-mentioned embodiments. For example, several constituent elements can also be deleted from all the constituent elements shown in the embodiments. Furthermore, constituent elements can also be appropriately combined in different embodiments. Therefore, it should be considered that the present embodiment is merely an example in all aspects and is not limiting. Therefore, all modifications obvious to those skilled in the art are included in the embodiments.

[0165] Description of labels

[0166] 1: Air conditioning device; 5: Control unit; 23: Notification unit; 50: Ventilation device; 60: Indoor environment sensor; 70: Outdoor sensor; 100: Air conditioning and ventilation system.

[0167] Prior art literature

[0168] Patent Literature

[0169] Patent Document 1: Japanese Patent Application Laid-Open No. 8-145432

Claims

1. An air conditioning ventilation system (100), comprising: Air conditioning unit (1); Ventilation device (50); an indoor environment sensor (60) for detecting an indoor environment; and A control unit (5) controls the operation of the air conditioning device and the ventilation device, The control unit causes the air conditioner to perform a compensating operation before causing the ventilator to perform a ventilation operation, wherein the compensating operation is for compensating for changes in indoor temperature and / or humidity caused by the ventilation operation. The control unit determines the start timing of the ventilation operation based on the detection value of the indoor environment sensor. When the detection value of the indoor environment sensor exceeds a second threshold value, the control unit starts the compensation operation. The control unit starts the ventilation operation when the detection value of the indoor environment sensor exceeds a first threshold value that is higher than the second threshold value.

2. The air conditioning ventilation system according to claim 1, wherein: The compensating operation is a cooling operation, a dehumidifying operation, or a heating operation based on a second target temperature that is different by a predetermined temperature from a first target temperature set at the start of the compensating operation.

3. The air conditioning ventilation system according to claim 1 or 2, wherein: The control unit ends the compensation operation based on the start of the ventilation operation, based on the elapsed time from the start of the compensation operation, or based on the detection value of the indoor environment sensor.

4. The air conditioning ventilation system according to claim 1 or 2, wherein: The air conditioning and ventilation system further includes a notification unit (23) for notifying a user of the start and / or end of the compensation operation.

5. The air conditioning ventilation system according to claim 3, wherein: The air conditioning and ventilation system further includes a notification unit (23) for notifying a user of the start and / or end of the compensation operation.

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