Ventilation device

Abstract

A ventilation device (90) is provided with: a ventilation means (50) for ventilating a target space (I); an irradiation unit (60) that sterilizes the air in the object space (I) with ultraviolet rays; and a control unit (C) that performs coordinated control of the ventilation amount of the ventilation means (50) and the output of the irradiation means (60).

Description

TECHNICAL FIELD

[0001] The present disclosure relates to an air exchange device. BACKGROUND

[0002] In Patent Literature 1, there is disclosed an air conditioning device including a suction and exhaust device that exhausts indoor air to the outside. That is, the air conditioning device constitutes an air exchange device that exchanges air in an indoor space as an object space.

[0003] PRIOR ART DOCUMENTS

[0004] PATENT LITERATURE

[0005] Patent Literature 1: Japanese Patent No. 3992722 SUMMARY

[0006] PROBLEMS TO BE SOLVED BY THE INVENTION

[0007] With the air exchange by the suction and exhaust device (air exchange unit) described in Patent Literature 1 alone, it can be difficult to sufficiently reduce viruses and bacteria in the object space.

[0008] An object of the present disclosure is to provide an air exchange device that can appropriately deal with viruses and bacteria in an object space.

[0009] SOLUTION TO THE PROBLEMS

[0010] The first aspect relates to an air exchange device including an air exchange unit 50 that exchanges air in an object space I, an irradiation unit 60 that sterilizes air in the object space I with ultraviolet rays, and a control section C that controls the amount of air exchange of the air exchange unit 50 and the output of the irradiation unit 60 in linkage.

[0011] The amount of air exchange of the air exchange unit 50 and the output of the irradiation unit 60 both have an effect on reducing viruses and bacteria in the object space I. In the first aspect, since the control section C controls the amount of air exchange of the air exchange unit 50 and the output of the irradiation unit 60 in linkage, it is possible to appropriately deal with viruses and bacteria in the object space I.

[0012] The second aspect is based on the first aspect, and the control section C controls the amount of air exchange of the air exchange unit 50 and the output of the irradiation unit 60 in linkage such that the smaller the amount of air exchange of the air exchange unit 50, the larger the output of the irradiation unit 60.

[0013] In the second aspect, the control section C increases the output of the irradiation unit 60 when decreasing the ventilation amount of the ventilation unit 50, and decreases the output of the irradiation unit 60 when increasing the ventilation amount of the ventilation unit 50. The control section C decreases the ventilation amount of the ventilation unit 50 when increasing the output of the irradiation unit 60, and increases the ventilation amount of the ventilation unit 50 when decreasing the output of the irradiation unit 60.

[0014] The third aspect is based on the first or second aspect, and the control section C controls the ventilation amount of the ventilation unit 50 and the output of the irradiation unit 60 in linkage based on the ventilation amount of the subject space I corresponding to the output of the irradiation unit 60, i.e., the equivalent ventilation amount.

[0015] Since the output of the irradiation unit 60 has an effect on reducing viruses and bacteria in the subject space I, the output can be converted into the ventilation amount of the subject space I (the equivalent ventilation amount). Therefore, the control section C of the third aspect controls the ventilation amount of the ventilation unit 50 and the output of the irradiation unit 60 in linkage based on the equivalent ventilation amount of the irradiation unit 60. Thus, viruses and bacteria in the subject space I can be appropriately treated.

[0016] The fourth aspect is based on the third aspect, and the control section C controls the ventilation amount of the ventilation unit 50 and the output of the irradiation unit 60 in linkage so that the total ventilation amount, which is the sum of the equivalent ventilation amount corresponding to the output of the irradiation unit 60 and the ventilation amount of the ventilation unit 50, is equal to or greater than the necessary ventilation amount of the subject space I.

[0017] In the fourth aspect, since the total ventilation amount, which is the sum of the equivalent ventilation amount of the irradiation unit 60 and the ventilation amount of the ventilation unit 50, is equal to or greater than the necessary ventilation amount in the subject space I, viruses and bacteria in the subject space I can be sufficiently reduced.

[0018] The fifth aspect is based on the fourth aspect, and the control section C controls the ventilation unit 50 so that the ventilation amount of the ventilation unit 50 is equal to the target ventilation amount, and controls the output of the irradiation unit 60 so that the total ventilation amount, which is the sum of the equivalent ventilation amount corresponding to the output of the irradiation unit 60 and the target ventilation amount of the ventilation unit 50, is equal to or greater than the necessary ventilation amount.

[0019] In the fifth aspect, the control section C controls the ventilation unit 50 so that the ventilation amount of the ventilation unit 50 approaches the target ventilation amount. The control section C determines the output of the irradiation unit 60 so that the estimated ventilation amount based on the sum of the equivalent ventilation amount of the irradiation unit 60 and the target ventilation amount of the ventilation unit 50 reaches the necessary ventilation amount or more. The control section C controls the irradiation unit 60 so that the output of the irradiation unit 60 approaches the determined output.

[0020] The sixth aspect is based on the fourth aspect, and the control section C controls the irradiation unit 60 so that the output of the irradiation unit 60 reaches the target output, and controls the ventilation amount of the ventilation unit 50 so that the total ventilation amount reaches the necessary ventilation amount or more, the total ventilation amount being the total ventilation amount based on the sum of the equivalent ventilation amount corresponding to the target output of the irradiation unit 60 and the ventilation amount of the ventilation unit 50.

[0021] In the sixth aspect, the control section C controls the irradiation unit 60 so that the output of the irradiation unit 60 approaches the target capacity. The control section C determines the ventilation amount of the ventilation unit 50 so that the estimated ventilation amount based on the sum of the equivalent ventilation amount corresponding to the target output and the ventilation amount of the ventilation unit 50 reaches the necessary ventilation amount or more. The control section C controls the ventilation unit 50 so that the ventilation amount of the ventilation unit 50 approaches the determined ventilation amount.

[0022] The seventh aspect is based on any one of the fourth to sixth aspects, and the control section C determines the necessary ventilation amount based on the number of indoor persons in the subject space I.

[0023] In the seventh aspect, the sterilization capacity of the irradiation unit 60 and the ventilation amount of the ventilation unit 50 can be controlled based on the number of indoor persons in the subject space I.

[0024] In the eighth aspect, the greater the degree of degradation of the irradiation unit 60, the greater the ventilation amount of the ventilation unit 50 made by the control section C.

[0025] When the irradiation unit 60 is degraded, the actual output of the irradiation unit 60 decreases. Since the greater the degree of degradation of the irradiation unit 60, the greater the ventilation amount of the ventilation unit 50 made by the control section C, even if the irradiation unit 60 is degraded, viruses and bacteria in the subject space I can be appropriately treated.

[0026] The ninth aspect is based on any one of the first to eighth aspects, and the air exchange device further includes a first casing 30a in which an air passage 43 for air in the subject space I to flow is formed, and a first heat exchanger 32 arranged in the air passage 43. The air exchange unit 50 has a duct 51 that communicates the outdoor space O with the air passage 43. The irradiation unit 60 is arranged in the air passage 43 or the duct 51.

[0027] In the ninth aspect, the first heat exchanger 32 cools or heats the air in the air passage 43. The air exchange unit 50 exhausts the air in the air passage 43 to the outdoor space O through the duct 51, or supplies outdoor air from the outdoor space O to the subject space I through the duct 51. Thus, the subject space I can be ventilated. The irradiation unit 60 is arranged in the air passage 43 or the duct 51, and thus the air flowing in the air passage 43 or the duct 51 is sterilized with ultraviolet rays.

[0028] The tenth aspect is based on the ninth aspect, and the air exchange unit 50 is configured to exhaust the air in the air passage 43 to the outdoor space O through the duct 51. The irradiation unit 60 is arranged in the air passage 43 at a position on the downstream side of the air flow from the connection port 44 of the duct 51.

[0029] In the tenth aspect, the air in the subject space I is exhausted to the outdoor space O through the air passage 43 and the duct 51, and thus the air exchange unit 50 ventilates the subject space I. Since the irradiation unit 60 is arranged in the air passage 43 at a position on the downstream side of the air flow from the connection port 44 of the duct 51, the air sterilized by the irradiation unit 60 can be inhibited from being exhausted to the outdoor space O through the duct 51. In other words, the irradiation unit 60 is used to sterilize the air in the subject space I.

[0030] The eleventh aspect is based on the ninth aspect, and the air exchange unit 50 is configured to supply the air in the outdoor space O to the air passage 43 through the duct 51. The irradiation unit 60 is arranged in the air passage 43 at a position on the upstream side of the air flow from the connection port 44 of the duct 51.

[0031] In the eleventh aspect, the outdoor air in the outdoor space O is supplied to the subject space I through the duct 51 and the air passage 43, and thus the air exchange unit 50 ventilates the subject space I. Since the irradiation unit 60 is arranged in the air passage 43 at a position on the upstream side of the air flow from the connection port 44 of the duct 51, the irradiation unit 60 can sterilize the air in the air passage 43 before the outdoor air merges with the air. In other words, the irradiation unit 60 is used to sterilize the air in the subject space I.

[0032] The twelfth aspect is based on the ninth aspect, and the ventilation unit 50 is configured to supply air in the outdoor space O to the air passage 43 via the duct 51. The irradiation unit 60 is arranged in the air passage 43 at a position on the downstream side of the air flow from the connection port 44 of the duct 51.

[0033] In the twelfth aspect, since the irradiation unit 60 is arranged in the air passage 43 at a position on the downstream side of the air flow from the connection port 44 of the duct 51, the irradiation unit 60 is able to sterilize bacteria (mold, bacteria) contained in the outdoor air with ultraviolet rays.

[0034] The thirteenth aspect is based on the ninth aspect, and the irradiation unit 60 is arranged in the air passage 43 in parallel with the connection port 44 of the duct 51.

[0035] In the thirteenth aspect, a region in the air passage 43 in which air is sterilized by the irradiation unit 60 is less likely to be affected by air flowing in the duct 51.

[0036] The fourteenth aspect is based on any one of the first to eighth aspects, and the ventilation device further includes a second casing 91 in which a supply air passage 103 for supplying outdoor air to the subject space I and an exhaust air passage 104 for discharging air in the subject space I toward the outdoor space are formed, and a second heat exchanger 94 that exchanges heat between air in the supply air passage 103 and air in the exhaust air passage 104. The irradiation unit 60 is arranged in the supply air passage 103.

[0037] In the fourteenth aspect, the second heat exchanger 94 exchanges heat between air flowing in the supply air passage 103 and air flowing in the exhaust air passage 104. Thus, the second heat exchanger 94 heats or cools air supplied from the supply air passage 103 to the subject space I. The irradiation unit 60 sterilizes air supplied from the supply air passage 103 to the subject space I with ultraviolet rays.

[0038] The fifteenth aspect is based on the fourteenth aspect, and a circulation passage 107 that sends air in the subject space I to the subject space I is formed in the second casing 91. The irradiation unit 60 is arranged in the circulation passage 107.

[0039] In the fifteenth aspect, air in the subject space I is supplied to the subject space I through the circulation passage 107. The irradiation unit 60 sterilizes air supplied from the circulation passage 107 to the subject space I with ultraviolet rays.

[0040] The sixteenth aspect is based on any one of the first to eighth aspects, and the ventilation device 90 includes an air conditioning unit 120 that adjusts air in the subject space I, and the air conditioning unit 120 has the irradiation unit 60. The ventilation unit 50 is provided independently from the air conditioning unit 120.

[0041] In the sixteenth aspect, a ventilation system is constituted in which the air conditioning unit 120 having the irradiation unit 60 is provided independently from the ventilation unit 50. BRIEF DESCRIPTION OF DRAWINGS

[0042] Figure 1 is a configuration diagram of an air conditioning device to which the embodiment relates.

[0043] Figure 2 is a piping system diagram of the air conditioning device.

[0044] Figure 3 is a configuration diagram showing the internal structure of the indoor unit.

[0045] Figure 4 is a block diagram showing the main devices of the air conditioning device.

[0046] Figure 5 is a flowchart of the linkage control.

[0047] Figure 6 is a flowchart to which the modified example 1A relates.

[0048] Figure 7 is a flowchart to which the modified example 1B relates.

[0049] Figure 8 is a flowchart to which the modified example 1C relates.

[0050] Figure 9 is a diagram corresponding to Figure 3 to which the modified example 2A relates.

[0051] Figure 10 is a diagram corresponding to Figure 3 to which the other example of the modified example 2A relates.

[0052] Figure 11 is a diagram corresponding to Figure 3 to which the modified example 2B relates.

[0053] Figure 12 is a whole configuration diagram of the ventilation device to which the modified example 3 relates, showing the air flow in the ventilation operation.

[0054] Figure 13 is a whole configuration diagram of the ventilation device to which the modified example 3 relates, showing the air flow in the circulation operation.

[0055] Figure 14 This is a schematic diagram of the overall structure of the ventilation system involved in Modification Example 4. DETAILED DESCRIPTION

[0056] Below, embodiments of the present disclosure are described in detail with reference to the accompanying drawings. It should be noted that the present disclosure is not limited to the embodiments shown below, and various modifications are possible without departing from the technical scope of the present disclosure. The drawings are intended to conceptually illustrate the present disclosure, and therefore, dimensions, proportions, or quantities may be exaggerated or simplified as necessary to facilitate understanding.

[0057] (1) Structure of ventilation device

[0058] The ventilation device of this embodiment constitutes an air conditioning device 10. The air conditioning device 10 adjusts the temperature of the air in an indoor space I, which is a target space. The air conditioning device 10 includes a ventilation unit 50 for ventilating the indoor space I and an irradiation unit 60 for sterilizing the air in the indoor space I using ultraviolet light. The air conditioning device 10 includes a control unit C that controls the ventilation volume of the ventilation unit 50 and the output of the irradiation unit 60 in a coordinated manner.

[0059] (1-1) Overall structure

[0060] like Figure 1 and Figure 2 As shown, the air conditioning apparatus 10 includes an outdoor unit 20, an indoor unit 30, and two connecting pipes 12 and 13. The outdoor unit 20 and the indoor unit 30 are connected to each other via the two connecting pipes 12 and 13, thereby forming a refrigerant circuit 11. The refrigerant circuit 11 performs a refrigeration cycle by circulating a refrigerant.

[0061] (1-2) Outdoor unit

[0062] The outdoor unit 20 is installed outdoors and includes an outdoor casing 20 a , a compressor 21 , an outdoor heat exchanger 22 , an expansion valve 23 , a four-way reversing valve 24 , and an outdoor fan 25 .

[0063] The four-way reversing valve 24 is in the first state ( Figure 2 The state shown by the solid line in the figure) and the second state ( Figure 2 to switch between the states shown by dotted lines in the figure).

[0064] (1-3) Indoor unit

[0065] like Figure 1 and Figure 2As shown, the indoor unit 30 is installed in the indoor space I. The indoor unit 30 includes an indoor casing 30a as a first casing, an indoor heat exchanger 32 as a first heat exchanger, an indoor fan 33, and an air guide plate 35. The indoor unit 30 includes an irradiation unit 60 for irradiating ultraviolet rays.

[0066] The indoor casing 30a houses the indoor heat exchanger 32 and the indoor fan 33. An air inlet 41 and an air outlet 42 are formed in the indoor casing 30a. The air inlet 41 is formed in the upper portion of the indoor casing 30a. The air outlet 42 is formed in the lower portion of the indoor casing 30a, near the front. An air passage 43 is formed between the air inlet 41 and the air outlet 42.

[0067] The indoor heat exchanger 32 is arranged upstream of the indoor fan 33 in the air passage 43. The indoor heat exchanger 32 exchanges heat between the refrigerant flowing therein and the air sent by the indoor fan 33.

[0068] The indoor fan 33 is driven to rotate by a fan motor 33a. The indoor fan 33 conveys air in the air passage 43. The indoor fan 33 is configured to adjust the volume of air blown out from the air outlet 42 to the indoor space I. The volume of the blown air is adjusted by adjusting the rotation speed of the fan motor 33a.

[0069] (1-3) Ventilation unit

[0070] like Figure 1 and Figure 2 As shown, the ventilation unit 50 includes a duct 51 , a ventilation casing 52 connected to the duct 51 , and a ventilation fan 53 housed in the ventilation casing 52 .

[0071] The duct 51 forms a communication path for connecting the indoor space I with the outdoor space O. The duct 51 is a component that forms a flow path for air flow and may also include a flexible hose or tube. A through hole 5 is formed in the wall W that separates the indoor space I from the outdoor space O. The duct 51 passes through the through hole 5 together with the connecting ducts 12 and 13. One end of the duct 51 is connected to the air passage 43 in the indoor casing 30a. Figure 3 As shown, a connection port 44 to which one end of a duct 51 is connected is formed in the air passage 43. The connection port 44 is formed in the indoor casing 30a. The other end of the duct 51 communicates with the outdoor space O.

[0072] The ventilator casing 52 is installed outdoors. A first opening 52a and a second opening 52b are formed in the ventilator casing 52. The first opening 52a is connected to the other end of the duct 51. The second opening 52b opens to the outdoor space O. A flow path for air flow is formed inside the ventilator casing 52.

[0073] The ventilation fan 53 is arranged inside the ventilation casing 52. The ventilation fan 53 transports the air in the duct 51. The ventilation fan 53 of the present embodiment is an exhaust fan that transports the air in the duct 51 toward the outdoor space O. The ventilation fan 53 is configured to be variable in air volume. Specifically, a first motor 53a of the ventilation fan 53 is configured to be variable in rotational speed.

[0074] As Figure 2 Illustratively, the ventilation unit 50 has a switching mechanism 54. The switching mechanism 54 opens and closes the flow path in the duct 51. The switching mechanism 54 is configured by a damper, a shutter, a switching valve, or the like. The switching mechanism 54 opens and closes the connection port 44 of the duct 51.

[0075] (1-4) Irradiation Unit

[0076] The irradiation unit 60 inactivates viruses and bacteria in the air by irradiating ultraviolet rays into the air. As Figure 2 and Figure 4 Illustratively, the irradiation unit 60 has an LED (Light Emitting Diode) 61 and a circuit board 62 that controls the LED 61.

[0077] The LED 61 is a light source that irradiates ultraviolet rays. The peak wavelength of the ultraviolet rays irradiated by the LED 61 is 280 nm or less. Thereby, the sterilization effect on the air can be improved. The peak wavelength of the ultraviolet rays irradiated by the LED 61 is preferably 255 nm or more and 275 nm or less. Thereby, the sterilization effect on the air can be improved in particular. The peak wavelength of the ultraviolet rays irradiated by the LED 61 can also be 230 nm or less. Thereby, in the case where the ultraviolet rays leak to the outside of the indoor unit casing 30a, the safety when a human body is exposed to the ultraviolet rays can be improved.

[0078] The circuit board 62 includes a control substrate for controlling the LED 61. Specifically, the circuit board 62 includes a control device for switching the on / off of the LED 61 and adjusting the output (specifically, the illuminance) of the LED 61. The control device of the circuit board 62 can also be provided in the control section C for controlling the air conditioning device 10.

[0079] As Figure 3 Illustratively, the irradiation unit 60 of the present embodiment is arranged in the air passage 43 at a position that is on the downstream side of the air flow from the connection port 44 of the duct 51. The irradiation unit 60 is arranged between the indoor heat exchanger 32 and the indoor fan 33. The irradiation unit 60 can also be arranged between the connection port 44 and the indoor heat exchanger 32.

[0080] (1-5) Remote Controller

[0081] As Figure 2 and Figure 4As shown, the air conditioner 10 includes a remote control 70. The remote control 70 includes an operating unit 71 and a display unit 72. The operating unit 71 is used by the user to input various instructions for the air conditioner 10. The operating unit 71 is composed of buttons, switches, a touch panel, etc. Instructions include turning the air conditioner 10 on / off, selecting the operating mode of the air conditioner 10, and changing the set temperature of the indoor space I. The display unit 72 displays information related to the status and operation of the air conditioner 10. This information includes the operating mode and set temperature of the air conditioner 10.

[0082] In this embodiment, the user can set the target ventilation volume of the ventilation unit 50 and the target output of the irradiation unit 60 by operating the operation unit 71. Here, the output of the irradiation unit 60 corresponds to the intensity or illumination of the LED 61.

[0083] (1-6) Sensors

[0084] like Figure 4 As shown, the air conditioning unit 10 includes multiple sensors. In this embodiment, the multiple sensors include an indoor temperature sensor 80, an infrared sensor 81, and an outdoor temperature sensor 82. The indoor temperature sensor 80 detects the temperature of the indoor air in the indoor space I. The indoor temperature sensor 80 is, for example, located near the air inlet 41. The infrared sensor 81 is a person detection unit that detects the number of people present in the indoor space I. The infrared sensor 81 is located on the front surface of the indoor casing 30a. The outdoor temperature sensor 82 detects the temperature of the outdoor air in the outdoor space O. The outdoor temperature sensor 82 is provided in the outdoor unit 20.

[0085] (1-7) Control Unit

[0086] The control unit C controls the air conditioner 10 as a ventilation device. Figure 4 As shown, the control unit C includes an indoor control unit IC, an outdoor control unit OC, and an operator control unit RC. These units are configured to communicate with each other via wired or wireless means. Each of the indoor control unit IC, outdoor control unit OC, and operator control unit RC includes an MCU (Micro Control Unit), electrical circuits, and electronic circuits. The MCU includes a CPU (Central Processing Unit), memory, and a communication interface. The memory stores various programs for execution by the CPU.

[0087] The outdoor control section OC is provided in the outdoor unit 20. The outdoor control section OC is arranged inside the outdoor unit case 20a. The outdoor control section OC controls mechanical elements provided in the outdoor unit 20. The outdoor control section OC controls the air exchange amount of the air exchange unit 50. Specifically, the outdoor control section OC switches the on / off of the air exchange fan 53, or adjusts the air volume of the air exchange fan 53. Here, the air volume of the air exchange fan 53 corresponds to the air exchange amount of the air exchange unit 50. The outdoor control section OC controls the rotation speed of the first motor 53a to adjust the air volume of the air exchange unit 50. The detection signal of the outdoor temperature sensor 82 is input to the outdoor control section OC.

[0088] The indoor control section IC is provided in the indoor unit 30. The indoor control section IC is arranged inside the indoor unit case 30a. The indoor control section IC controls mechanical elements provided in the indoor unit 30. The indoor control section IC controls the output of the irradiation unit 60. Here, the output of the irradiation unit 60 of the present embodiment is the illuminance (ultraviolet intensity) of the LED 61. The indoor control section IC switches the on / off of the LED 61 of the irradiation unit 60, or adjusts the output (ultraviolet intensity) of the LED 61. The detection signals of the indoor temperature sensor 80 and the infrared sensor 81 are input to the indoor control section IC.

[0089] The operation control section RC sends to the indoor control section IC an instruction related to the operation mode and the set temperature input by the user through the operation section 71. The instruction is sent from the indoor control section IC to the outdoor control section OC.

[0090] (2) Operation Action

[0091] The air conditioning device 10 performs a cooling operation, a heating operation, and an air exchange operation.

[0092] (2-1) Cooling Operation

[0093] The cooling operation is an operation to cool the air in the indoor space I to approach the set temperature (target temperature). In the cooling operation, the control section C operates the compressor 21, the outdoor fan 25, and the indoor fan 33, makes the four-way valve 24 be in the first state, and adjusts the opening degree of the expansion valve 23. The control section C makes the switching mechanism 54 be in the closed state, and stops the air exchange fan 53 and the irradiation unit 60.

[0094] In the cooling operation, the refrigerant compressed in the compressor 21 is heat-released in the outdoor heat exchanger 22, and then depressurized in the expansion valve 23. The depressurized refrigerant is evaporated in the indoor heat exchanger 32. The air cooled by the indoor heat exchanger 32 is supplied to the indoor space I. The refrigerant evaporated in the indoor heat exchanger 32 is sucked into the compressor 21.

[0095] (2-2) Heating operation

[0096] The heating operation is an operation in which air in the indoor space I is heated to approach a set temperature (target temperature). In the heating operation, the control portion C causes the compressor 21, the outdoor fan 25, and the indoor fan 33 to operate, causes the four-way reversing valve 24 to be in the second state, and adjusts the opening degree of the expansion valve 23. The control portion C causes the switching mechanism 54 to be in the closed state, and causes the ventilation fan 53 to stop. The control portion C causes the switching mechanism 54 to be in the closed state, and causes the ventilation fan 53 and the irradiation unit 60 to stop.

[0097] In the heating operation, the refrigerant compressed in the compressor 21 is discharged to the indoor heat exchanger 32, and then is expanded in the expansion valve 23. The air heated by the indoor heat exchanger 32 is supplied to the indoor space I. The refrigerant expanded in the expansion valve 23 is evaporated in the outdoor heat exchanger 22, and then is sucked into the compressor 21.

[0098] (2-3) Ventilation operation

[0099] The ventilation operation is an operation in which air in the indoor space I is ventilated. The ventilation operation of the present embodiment discharges the indoor air of the indoor space I to the outdoor space O. In the ventilation operation, the ventilation unit 50 and the irradiation unit 60 are operated, so that viruses and bacteria in the indoor space I are reduced. The ventilation operation includes a separate ventilation operation, a cooling ventilation operation, and a heating ventilation operation.

[0100] In the separate ventilation operation, the control portion C causes the compressor 21 and the outdoor fan 25 to stop, and causes the indoor fan 33 to operate. The control portion C causes the switching mechanism 54 to be in the open state, and causes the ventilation fan 53 to operate. The control portion C appropriately turns on the irradiation unit 60 according to the operation conditions.

[0101] In the separate ventilation operation, the indoor air of the indoor space I flows into the air passage 43 through the suction port 41. Part of the air in the air passage 43 flows into the duct 51 from the connection port 44 (refer to the solid arrow in FIG. 6). The air flowing into the duct 51 is discharged to the outdoor space O. The remaining air in the air passage 43 passes through the irradiation unit 60 in the on state. Figure 3

[0102] The LED 61 of the irradiation unit 60 irradiates ultraviolet rays toward the air. Thus, viruses and bacteria in the air are inactivated. The air after passing through the irradiation unit 60 is supplied to the indoor space I from the blowout port 42.

[0103] ​During cooling and ventilation operation, the controller C operates the compressor 21, outdoor fan 25, and indoor fan 33, sets the four-way reversing valve 24 to the first state, and adjusts the opening of the expansion valve 23. Simultaneously, the controller C opens the switch mechanism 54, activating the irradiation unit 60 and the ventilation unit 50. This allows the indoor space I to be cooled and ventilated simultaneously.

[0104] During the heating and ventilation operation, the controller C operates the compressor 21, the outdoor fan 25, and the indoor fan 33, sets the four-way reversing valve 24 to the second state, and adjusts the opening of the expansion valve 23. Simultaneously, the controller C opens the switch mechanism 54, activating the irradiation unit 60 and the ventilation unit 50. This allows the indoor space I to be heated and ventilated simultaneously.

[0105] (3) Linkage control

[0106] In the ventilation operation, the control unit C controls the irradiation unit 60 and the ventilation unit 50 in conjunction with each other. Figure 5 The details of the interlocking control will be described. In the air-conditioning apparatus 10 of the present embodiment, the ventilation volume of the ventilation unit 50 is determined with priority over the output of the irradiation unit 60 .

[0107] When a ventilation operation start command is input to the control unit C, in step ST1 , the control unit C determines the number of people in the indoor space I, which is the target space. Specifically, the control unit C determines the number of people in the indoor space I based on a signal detected by the infrared sensor 81 .

[0108] In step ST2, the control unit C calculates the required ventilation volume Vn of the indoor space I. The required ventilation volume Vn is the ventilation volume required to prevent viral infection. The required ventilation volume Vn is expressed by the following formula (1), for example.

[0109] Vn=α×n……(1)

[0110] Here, α is the ventilation rate required for each person in the indoor space I, for example, 30 [m 3 / h / person]. n is the number of people in the indoor space I.

[0111] In step ST3, the control unit C determines the target ventilation volume of the ventilation unit 50. The target ventilation volume corresponds to, for example, a set ventilation volume set in advance by the user.

[0112] In step ST4 , the control unit C determines the equivalent ventilation volume of the irradiation unit 60 so that the total ventilation volume Vt of the air-conditioning apparatus 10 becomes equal to or greater than the required ventilation volume Vn.

[0113] Here, the total ventilation volume Vt is expressed by the following formula (2).

[0114] Total ventilation amount Vt = ventilation amount of ventilation unit V1 + forced ventilation amount V2 + equivalent ventilation amount Ve … (2)

[0115] The total ventilation amount Vt is a ventilation amount for reducing the risk of infection with respect to the entire indoor space I. Therefore, when the total ventilation amount Vt reaches the necessary ventilation amount Vn or more, viruses and bacteria in the indoor space I can be sufficiently treated.

[0116] The ventilation amount V1 of the ventilation unit 50 is a ventilation amount in which the ventilation unit 50 ventilates the indoor space I. In the present embodiment, as the ventilation amount V1, the target ventilation amount decided in step ST3 is used.

[0117] The forced ventilation amount V2 is obtained by multiplying the ventilation frequency (forced ventilation) prescribed by the building standard law by the volume of the indoor space I. For example, the forced ventilation amount V2, the volume of the indoor space I are set in the control section C by an installer, a user, or the like via the remote controller 70 or the like.

[0118] The equivalent ventilation amount Ve is a ventilation amount of the indoor space I corresponding to the output of the irradiation unit 60. The equivalent ventilation amount Ve is obtained by converting the sterilization effect of the irradiation unit 60 into a ventilation amount of the indoor space I. When the air is irradiated with ultraviolet rays by the irradiation unit 60, viruses and bacteria are inactivated, and thus the risk of infection by air-borne transmission, droplet-borne transmission, aerosol-borne transmission, or the like can be reduced. The equivalent ventilation amount Ve can be obtained by multiplying the ventilation frequency ACH [1 / h] corresponding to the output of the irradiation unit 60 by the volume of the indoor space I. Here, the ventilation frequency ACH corresponds to the decay rate (sterilization capacity) of viruses and bacteria by the irradiation unit 60, and is an index corresponding to the output of the irradiation unit 60.

[0119] The control section C stores first data in which the output of the irradiation unit 60 and the equivalent ventilation amount are associated. The data can be a function between the output of the irradiation unit 60 and the equivalent ventilation amount Ve, or a data table having a plurality of outputs of the irradiation unit 60 and the equivalent ventilation amounts Ve corresponding to each of the outputs of the irradiation unit 60.

[0120] In step ST4, the control section C obtains the equivalent ventilation amount Ve of the irradiation unit 60 so that the total ventilation amount Vt obtained by the above formula (2) reaches the necessary ventilation amount Vn or more. In the present embodiment, the control section C obtains the equivalent ventilation amount Ve so that the total ventilation amount Vt is equal to the necessary ventilation amount Vn. In a case where the sum of the ventilation amount V1 of the ventilation unit 50 and the forced ventilation amount V3 reaches the total ventilation amount Vt or more, the equivalent ventilation amount Ve is zero.

[0121] In step ST5, the control section C decides the target output of the irradiation unit 60 corresponding to the equivalent ventilation volume Ve on the basis of the first data. In the case where the equivalent ventilation volume Ve is zero, the target output of the irradiation unit 60 is zero.

[0122] In step ST6, the control section C controls the ventilation unit 50 and the irradiation unit 60 using the ventilation target volume decided in step ST2 and the target output of the irradiation unit 60 decided in step ST5 as control commands. Specifically, the control section C controls the ventilation fan 53 so that the air volume of the ventilation fan 53 of the ventilation unit 50 approaches the target ventilation volume. The control section C controls the irradiation unit 60 so that the output of the irradiation unit 60 approaches the target output. In the case where the target output of the irradiation unit 60 is zero, the control section C turns off the irradiation unit 60.

[0123] Through the above control, in the ventilation operation, the total ventilation volume Vt reaches the necessary ventilation volume Vn or more. As a result, viruses and bacteria in the indoor space I can be properly treated.

[0124] After that, in the case where the number of people in the subject space I increases, the necessary ventilation volume Vn decided in step ST2 increases. In this case, the equivalent ventilation volume Ve decided in step ST4 increases, and further, the target output of the irradiation unit 60 decided in step ST5 increases.

[0125] On the contrary, in the case where the number of people in the subject space I decreases, the necessary ventilation volume Vn decided in step ST2 decreases. In this case, the equivalent ventilation volume Ve decided in step ST4 decreases, and further, the target output of the irradiation unit 60 decided in step ST5 decreases.

[0126] There is also a case where the target ventilation volume (ventilation volume V1) of the ventilation unit 50 in step ST3 increases due to a change in setting by a user or the like. In this case, the equivalent ventilation volume Ve decided in step ST4 decreases, and further, the target output of the irradiation unit 60 decided in step ST5 decreases.

[0127] On the contrary, there is also a case where the target ventilation volume (ventilation volume V1) of the ventilation unit 50 in step ST3 decreases due to a change in setting by a user or the like. In this case, the equivalent ventilation volume Ve decided in step ST4 increases, and further, the target output of the irradiation unit 60 decided in step ST5 increases.

[0128] (4) Effects of Embodiments

[0129] Since the control section C controls the ventilation volume of the ventilation unit 50 and the output of the irradiation unit 60 in linkage, viruses and bacteria in the indoor space I can be properly treated.

[0130] The control section C controls the ventilation amount of the ventilation unit 50 and the output of the irradiation unit 60 in linkage so that the smaller the ventilation amount of the ventilation unit 50 is, the larger the output of the irradiation unit 60 is.

[0131] In this configuration, in a case where the ventilation amount of the ventilation unit 50 is insufficient, by increasing the output of the irradiation unit 60, the virus and bacteria in the indoor space I can be properly treated. Conversely, in a case where the ventilation amount of the ventilation unit 50 is sufficiently large, by decreasing the output of the irradiation unit 60, the power consumption of the irradiation unit 60 can be reduced.

[0132] The control section C controls the ventilation amount of the ventilation unit 50 and the output of the irradiation unit 60 in linkage based on the ventilation amount of the indoor space I, i.e., the equivalent ventilation amount Ve, corresponding to the output of the irradiation unit 60.

[0133] In this configuration, by finding the equivalent ventilation amount Ve corresponding to the output of the irradiation unit 60, ventilation that takes into account the reduction effect of the irradiation unit 60 on the infection risk can be achieved.

[0134] The control section C controls the ventilation amount of the ventilation unit 50 and the output of the irradiation unit 60 in linkage so that the total ventilation amount Vt, which is the total ventilation amount based on the sum of the equivalent ventilation amount Ve corresponding to the output of the irradiation unit 60 and the ventilation amount of the ventilation unit 50, reaches the necessary ventilation amount Vn of the indoor space I.

[0135] In this configuration, by making the total ventilation amount Vt be the necessary ventilation amount Vn or more, the virus and bacteria in the indoor space I can be reliably treated.

[0136] The control section C controls the ventilation unit 50 so that the ventilation amount of the ventilation unit 50 reaches a target ventilation amount. The control section C controls the output of the irradiation unit 60 so that the total ventilation amount Vt, which is the total ventilation amount based on the sum of the equivalent ventilation amount Ve corresponding to the output of the irradiation unit 60 and the target ventilation amount of the ventilation unit 50, reaches the necessary ventilation amount Vn.

[0137] In this configuration, ventilation operation in which the ventilation amount of the ventilation unit 50 is set to the target ventilation amount that has been set can be performed. In a case where the target ventilation amount of the ventilation unit 50 is insufficient with respect to the necessary ventilation amount, by turning on the irradiation unit 60 or increasing the output of the irradiation unit 60, the insufficiency can be compensated for. In a case where the target ventilation amount of the ventilation unit 50 is excessive with respect to the necessary ventilation amount, by turning off the irradiation unit 60 or decreasing the output of the irradiation unit 60, the power consumption of the irradiation unit 60 can be reduced.

[0138] The control section C determines the necessary ventilation amount based on the number of indoor persons in the indoor space I.

[0139] In this configuration, ventilation that takes into account the infection risk corresponding to the number of people in the room can be realized.

[0140] The air-conditioning device 10 includes an indoor unit casing 30a in which an air passage 43 through which air in the indoor space I flows is formed, and an indoor heat exchanger 32 arranged in the air passage 43. The ventilation unit 50 has a duct 51 that communicates the outdoor space O with the air passage 43. The irradiation unit 60 is arranged in the air passage 43 or the duct 51.

[0141] In this configuration, the ventilation function of the ventilation unit 50 can be added to the air-conditioning device 10. Further, the sterilization function of the irradiation unit 60 can be added to the air-conditioning device 10, and further, the ventilation function that contributes to the reduction of the infection risk can be added to the air-conditioning device 10.

[0142] The ventilation unit 50 is configured to discharge air in the air passage 43 to the outdoor space O via the duct 51. The irradiation unit 60 is arranged in the air passage 43 at a position on the downstream side of the air flow from the connection port 44 of the duct 51.

[0143] In this configuration, air sterilized by the irradiation unit 60 can be inhibited from being discharged to the outdoor space via the duct 51. Thus, the actual equivalent ventilation volume of the irradiation unit 60 can be inhibited from being smaller than the decided equivalent ventilation volume Ve.

[0144] (5) Modification of the Embodiment

[0145] In the above-described embodiment, the following modification can also be employed. Hereinafter, points different from the above-described embodiment will be described.

[0146] (5-1) Modification 1: Modification of the Linkage Control

[0147] The linkage control of the above-described embodiment can also employ the following modification.

[0148] (5-1A) Modification 1A

[0149] In the linkage control of Modification 1A, the control section C reduces the ventilation volume of the ventilation unit 50 in a case where the temperature difference between the outdoor air and the indoor air is large. The control section C performs the process of Figure 5 between the steps ST2 and ST3 of the above-described embodiment. Figure 6The control is shown. In step ST11, the control section C acquires the indoor temperature Ti. The indoor temperature Ti is detected by the indoor temperature sensor 80. The detected indoor temperature Ti is input into the control section C. In step ST12, the control section C acquires the outdoor temperature To. The outdoor temperature To is detected by the outdoor temperature sensor 82. The detected outdoor temperature To is input into the control section C.

[0150] In step ST13, the control section C determines whether the difference ΔT between the indoor temperature Ti and the outdoor temperature To is above a prescribed value. When ventilation is performed in a case where ΔT is large, the air conditioning load of the indoor space I increases. Especially, as will be described later in detail, in ventilation in which outdoor air of the outdoor space O is supplied to the indoor space I, and in ventilation in which indoor air of the indoor space I is discharged to the outdoor space O while outdoor air of the outdoor space O is supplied to the indoor space I, this problem becomes significant. Therefore, in a case where ΔT is above the prescribed value in step ST13, the control section C reduces the target ventilation amount of the ventilation unit 50 in step ST15. In a case where ΔT is not above the prescribed value in step ST13, the control section C maintains the target ventilation amount of the ventilation unit 50 in step ST14.

[0151] In a case where the target ventilation amount of the ventilation unit 50 is reduced in step ST15, the target ventilation amount (ventilation amount Vi) decided in step ST3 is reduced. As a result, in step ST4, the equivalent ventilation amount Ve of the irradiation unit 60 is increased, and in step ST5, the target output of the irradiation unit 60 is increased. As a result, it is possible to sufficiently treat viruses and bacteria in the indoor space I while suppressing an increase in the air conditioning load of the indoor space I due to intrusion of outside air into the indoor space I.

[0152] Note that in step ST11, the indoor temperature sensor 80 that detects the temperature of indoor air can also be arranged near the blowout port 42, at a prescribed position of the indoor space I, or in the remote controller 70. In step ST11, the set temperature of the indoor space I in the cooling ventilation operation or the heating ventilation operation can also be used instead of the temperature of indoor air. This is in order to cause the temperature of indoor air to converge on the set temperature. The control section C can also acquire the outdoor temperature included in weather information or the like from an external data server via a network.

[0153] In a case where ΔT is below the prescribed value in step ST13, the control section C can also increase the target ventilation amount of the ventilation unit 50 in step ST15. In this structure, in a case where ΔT is not below the prescribed value in step ST15, the control section C maintains the target ventilation amount of the ventilation unit 50 in step ST14.

[0154] When the target ventilation volume of the ventilation unit 50 is increased in step ST15, the target ventilation volume (ventilation volume V1) determined in step ST3 is increased. As a result, the equivalent ventilation volume Ve of the irradiation unit 60 is reduced in step ST4, and the target output of the irradiation unit 60 is reduced in step ST5. This prevents accelerated degradation of the LED 61 due to excessive output from the irradiation unit 60. Furthermore, the power consumption of the LED 61 can be reduced.

[0155] In step ST13 , the control unit C may decrease the target ventilation volume of the ventilation unit 50 as ΔT increases, and may increase the target ventilation volume of the ventilation unit 50 as ΔT decreases.

[0156] (5-1B) Modification 1B

[0157] In the interlocking control of Modification 1B, the output of the irradiation unit 60 is determined with priority over the ventilation volume of the ventilation unit 50 .

[0158] like Figure 7 As shown, in step ST21, the control unit C determines the number of people in the target space I. In step ST22, the control unit C determines the required ventilation volume Vn. Next, in step ST23, the control unit C determines the target output of the irradiation unit 60. The target output of the irradiation unit 60 is the set output of the irradiation unit 60 determined by settings made by the user or the like.

[0159] In step ST24, the control unit C determines the equivalent ventilation volume Ve corresponding to the target output of the irradiation unit 60. The control unit C determines the equivalent ventilation volume Ve corresponding to the target capacity based on the target output of the irradiation unit 60 and the first data.

[0160] In step ST25, the control unit C calculates the ventilation volume V1 of the ventilation unit 50 so that the total ventilation volume Vt is equal to or greater than the required ventilation volume Vn, based on the above-mentioned equation (2). In this example, the control unit C calculates the ventilation volume V1 so that the total ventilation volume Vt is equal to the required ventilation volume Vn, and uses this ventilation volume V1 as the target ventilation volume of the ventilation unit 50.

[0161] In step ST26, the control unit C uses the target output of the irradiation unit 60 determined in step ST23 and the target ventilation volume determined in step ST25 as control commands to control the ventilation unit 50 and the irradiation unit 60. Specifically, the control unit C controls the irradiation unit 60 so that the output of the irradiation unit 60 approaches the target output. The control unit C controls the ventilation fan 53 so that the air volume of the ventilation fan 53 of the ventilation unit 50 approaches the target ventilation volume.

[0162] By the above control, in the ventilation operation, the total ventilation amount Vt reaches the necessary ventilation amount Vn or more. As a result, the virus, bacteria in the indoor space I can be properly treated.

[0163] In step ST23, the control portion 100 can also decrease the target output of the irradiation unit 60 in a case where the difference ΔT between the indoor temperature Ti and the outdoor temperature To is smaller than a prescribed value. In this case, the target ventilation amount of the ventilation unit 50 increases as the target output decreases. However, since ΔT is not particularly large, the increase in the air conditioning load in the indoor space can be suppressed. The power consumption of the irradiation unit 60 can also be reduced. The control portion 100 can also increase the target output of the irradiation unit 60 in a case where ΔT is larger than the prescribed value. The control portion 100 can also increase the target output of the irradiation unit 60 as ΔT is larger, and decrease the target output of the irradiation unit 60 as ΔT is smaller.

[0164] In step ST23, the control portion 100 can also make the target output of the irradiation unit 60, specifically, make the illuminance of the LED 61 smaller as the degree of deterioration of the LED 61 is larger. In this case, the target ventilation amount of the ventilation unit 50 increases as the target output decreases. By decreasing the illuminance of the LED 61, the acceleration of the deterioration of the LED 61 can be suppressed.

[0165] Here, the degree of deterioration of the LED 61 is an index showing how much the output of the current LED 61 has decreased from the output of the LED 61 in the initial state. Specifically, in a case where the illuminance of the LED 61 in the initial state with respect to a certain control command value is set to I1, and the illuminance of the current LED 61 with respect to the same control command value is set to I2, the degree of deterioration (%) can be expressed by the following equation.

[0166] Degree of deterioration (%) = (I1 - I2) / I1 x 100

[0167] The control portion 100 estimates the degree of deterioration of the LED 61 on the basis of data (data table, correlation formula, etc.) on the correlation between the cumulative value of the time during which the LED 61 is in the on state and the degree of deterioration. This data is stored in the storage portion of the control portion 100. The control portion 100 can also estimate the degree of deterioration of the LED 61 on the basis of the detection value of the output sensor 84 and the control output value of the LED 61, which will be described later in detail.

[0168] (5-1C) Modification 1C

[0169] In Modification 1C, the control portion C performs control taking into account the degree of deterioration of the irradiation unit 60 on the basis of the linkage control of Modification IB. As in Modification IB, the control portion C can also decrease the target output of the irradiation unit 60 in a case where the difference ΔT between the indoor temperature Ti and the outdoor temperature To is smaller than a prescribed value. In this case, the target ventilation amount of the ventilation unit 50 increases as the target output decreases. However, since ΔT is not particularly large, the increase in the air conditioning load in the indoor space can be suppressed. The power consumption of the irradiation unit 60 can also be reduced. The control portion C can also increase the target output of the irradiation unit 60 in a case where ΔT is larger than the prescribed value. The control portion C can also increase the target output of the irradiation unit 60 as ΔT is larger, and decrease the target output of the irradiation unit 60 as ΔT is smaller. Figure 8As shown in the air-conditioning apparatus 10 of Modification 1C, a deterioration degree estimation section 83 is provided. The deterioration degree estimation section 83 estimates the degree of deterioration of the LED 61 with use.

[0170] The deterioration degree estimation section 83 of this example includes an output sensor 84 and an arithmetic section 85 provided in the control section C. The output sensor 84 is constituted by an illuminance sensor or the like that detects the intensity of the ultraviolet light output from the LED 61. The arithmetic section 85 calculates the degree of deterioration of the LED 61 based on the control output value sent from the control section C to the LED 61 of the irradiation unit 60 and the detection value of the output sensor 84.

[0171] In the linked control of Modification 1C, in Figure 7 step ST24, the control section C determines the equivalent air exchange amount based on the degree of deterioration. Specifically, in the case where the degree of deterioration of the LED 61 is large, the actual output of the irradiation unit 60 (specifically, the illuminance of the LED 61) decreases, and the number of air exchanges (ACH) for sterilization also decreases. Therefore, the control section C performs correction that decreases the equivalent air exchange amount Ve when the degree of deterioration of the LED 61 is large. As a result, the target air exchange amount of the air exchange unit 50 determined in step ST25 increases.

[0172] As described above, in Modification 1C, the larger the degree of deterioration of the irradiation unit 60, the larger the air exchange amount of the air exchange unit 50 made by the control section C. As a result, it is possible to suppress an increase in the infection risk of the indoor space I due to deterioration of the irradiation unit 60.

[0173] As described above, the deterioration degree estimation section 83 can estimate the degree of deterioration of the LED 61 based on data related to the correlation between the cumulative value of the time during which the LED 61 is in the on state and the degree of deterioration.

[0174] (5-2) Modification 2: Modification of Air Exchange Unit and Irradiation Unit

[0175] In the air-conditioning apparatus 10 of the above-described embodiment, the air exchange unit 50 and the irradiation unit 60 can also be configured as shown below.

[0176] (5-2A) Modification 2A

[0177] In Modification 2A, the air exchange fan 53 supplies outdoor air of the outdoor space O to the air passage 43 in the first housing 30a through the duct 51. In other words, the air exchange fan 53 is an air supply fan that supplies outdoor air to the indoor space I.

[0178] As shown in Figure 9 the irradiation unit 60 is disposed at a position in the air passage 43 that is on the upstream side of the flow of air from the connection port 44 of the duct 51. The connection port 44 is disposed between the irradiation unit 60 and the first heat exchanger 32.

[0179] During ventilation operation, indoor air from the indoor space I flows into the air passage 43 through the intake port 41. The air in the air passage 43 passes through the irradiation unit 60 before flowing through the connection port 44. Meanwhile, outdoor air from the outdoor space O flows from the connection port 44 into the air passage 43 through the duct 51. In the air passage 43, the air that has passed through the irradiation unit 60 merges with the air that has flowed in from the duct 51 before being supplied to the indoor space I.

[0180] In Modification 2A, the air flowing from duct 51 into connection port 44 does not pass through irradiation unit 60. Therefore, the ultraviolet rays from irradiation unit 60 are used only to sterilize the indoor air. This prevents the actual equivalent ventilation volume of irradiation unit 60 from falling below the determined equivalent ventilation volume Ve.

[0181] like Figure 10 As shown, the irradiation unit 60 is arranged in the air passage 43, downstream of the connection port 44 of the duct 51 in the air flow direction. The connection port 44 is arranged between the irradiation unit 60 and the first heat exchanger 32. Outdoor air from the outdoor space O flows through the duct 51 from the connection port 44 into the air passage 43. After passing through the irradiation unit 60, this outdoor air is supplied to the indoor space I. In this configuration, the irradiation unit 60 can sterilize bacteria (bacteria and mold) contained in the outdoor air.

[0182] (5-2B) Modification 2B

[0183] In Modification 2B, the ventilation unit 50 is configured to reverse the direction of air flowing through the duct 51. For example, the ventilation unit 50 includes a ventilation fan 53 that delivers air in one direction and a flow path switching mechanism (not shown) that reverses the direction of air flowing through the duct 51. Alternatively, the ventilation fan 53 may be a type in which the rotation direction of the first motor 53a is reversible.

[0184] The ventilation unit 50 switches between a first operation in which the air in the air passage 43 is discharged to the outdoor space O through the duct 51 and a second operation in which the outdoor air in the outdoor space O is supplied to the air passage 43 through the duct 51 .

[0185] like Figure 11 As shown, the irradiation unit 60 is arranged in parallel with the connection port 44 of the duct 51 in the air passage 43. The air in the air passage 43 flows in parallel through the connection port 44 of the duct 51 and the irradiation unit 60. Specifically, the connection port 44 and the irradiation unit 60 are arranged in a direction perpendicular to the air flow.

[0186] In the modified example 2B, in the first operation, the outflow of the air from the connection port 44 to the outdoor space O after the irradiation unit 60 is suppressed. In the second operation, the flow of the air from the connection port 44 to the air passage 43 through the irradiation unit 60 is suppressed. In this way, in the modified example 2B, the indoor air for the indoor space I can sufficiently utilize the sterilization function of the irradiation unit 60. As a result, the actual equivalent air change amount of the irradiation unit 60 can be suppressed to be smaller than the decided equivalent air change amount Ve.

[0187] The present configuration can also be applied to the air conditioning device 10 in which the air exchange unit 50 performs only the first operation or only the second operation.

[0188] (5-3) Modified Example 3: Example of Total Heat Exchange Type Air Exchange Device

[0189] Figure 12 The air exchange device 90 of the modified example 3 shown in the figure performs air exchange for the indoor space I by simultaneously performing the supply of the air to the indoor space I and the exhaust of the air to the outdoor space O. The air exchange device 90 causes the air supplied to the indoor space I to exchange heat with the air exhausted to the outdoor space O. The air exchange device 90 is provided, for example, on the back surface of the ceiling and connected to a duct for transporting the air.

[0190] (5-3-1) Overall Configuration

[0191] The air exchange device 90 includes a housing 91 as a second housing, a supply fan 92, an exhaust fan 93, a total heat exchanger 94 as a second heat exchanger, and the irradiation unit 60. The supply fan 92 and the exhaust fan 93 constitute the air exchange unit 50 for performing air exchange for the indoor space I.

[0192] An indoor suction port 95 and a supply port 96 are formed on a first side wall 91a of the housing 91. An outdoor suction port 97 and an exhaust port 98 are formed on a second side wall 91b of the housing 91. The indoor suction port 95 and the supply port 96 are respectively communicated with the indoor space I via ducts. The outdoor suction port 97 and the exhaust port 98 are respectively communicated with the outdoor space O via ducts.

[0193] A first partition 101 and a second partition 102 are provided inside the housing 91. The first passage PI, the second passage P2, the third passage P3, and the fourth passage P4 are divided in the inside of the housing 91 by the first partition 101, the second partition 102, and the total heat exchanger 94. The first passage PI and the second passage P2 constitute a supply passage 103. The third passage P3 and the fourth passage P4 constitute an exhaust passage 104. The supply passage 103 is a passage for supplying the outdoor air OA as the supply air SA to the indoor space I. The exhaust passage 104 is a passage for exhausting the indoor air RA as the exhaust air EA to the outdoor space O.

[0194] The supply air fan 92 is disposed in the supply air passage 103. The supply air fan 92 is disposed in the second passage P2. The exhaust air fan 93 is disposed in the fourth passage P4.

[0195] The total heat exchanger 94 causes the air in the supply air passage 103 to exchange heat with the air in the exhaust air passage 104. The total heat exchanger 94 is formed with a first heat exchange flow path 94a that communicates with the supply air passage 103 and a second heat exchange flow path 94b that communicates with the exhaust air passage 104. The total heat exchanger 94 causes the air in the first heat exchange flow path 94a to exchange heat of sensible heat and latent heat with the air in the second heat exchange flow path 94b. The second heat exchanger can also not be the total heat exchanger 94, but can cause the air in both to exchange heat of sensible heat only.

[0196] A damper 105 is provided on the first damper 101 that separates the third passage P3 from the second passage P2. The damper 105 opens and closes a damper port 106 formed on the first damper 101. As shown in FIG. 6, when the damper 105 is in the open state, the third passage P3 communicates with the second passage P2 through the damper port 106. A circulation passage 107 that sends the indoor air of the indoor space I to the indoor space I is formed by the third passage P3, the damper port 106, and the second passage P2. Figure 13

[0197] The irradiation unit 60 is disposed in the supply air passage 103. Specifically, the irradiation unit 60 is disposed in the second passage P2. In other words, the irradiation unit 60 is disposed in the circulation passage 107. The irradiation unit 60 irradiates the air flowing in the supply air passage 103 or the circulation passage 107 with ultraviolet rays, thereby sterilizing the air.

[0198] (5-3-2) Air Exchange Operation

[0199] In the air exchange operation of the air exchange device 90 of the modification example 3, the control section C operates the supply air fan 92 and the exhaust air fan 93. The control section C suitably turns on the irradiation unit 60. The control section C causes the damper 105 to be in the closed state. Outdoor air flows into the supply air passage 103 from the outdoor air inlet 97. The air in the supply air passage 103 flows in the first heat exchange flow path 94a of the total heat exchanger 94. The indoor air of the indoor space I flows into the exhaust air passage 104 from the indoor air inlet 95 via the duct. The air in the exhaust air passage 104 flows in the second heat exchange flow path 94b of the total heat exchanger 94. The total heat exchanger 94 causes the air in the first heat exchange flow path 94a to exchange heat with the air in the second heat exchange flow path 94b.

[0200] ​For example, in the summer, the temperature of the indoor air in the air-conditioned indoor space I is lower than the temperature of the outdoor air, and the humidity of the indoor air is lower than the humidity of the outdoor air. Therefore, in the total heat exchanger 94, the air in the first heat exchange flow path 94a is cooled and dehumidified. For example, in the winter, the temperature of the indoor air in the air-conditioned indoor space I is higher than the temperature of the outdoor air, and the humidity of the indoor air is higher than the humidity of the outdoor air. Therefore, in the total heat exchanger 94, the air in the first heat exchange flow path 94a is heated and humidified.

[0201] As described above, the air whose temperature and humidity have been regulated in the first heat exchange flow path 94a passes through the irradiation unit 60. The air is sterilized by ultraviolet radiation emitted from the LEDs in the irradiation unit 60. The air that has passed through the irradiation unit 60 is supplied to the indoor space I via the air supply path 103, the air supply port 96, and the duct. The air in the second heat exchange flow path 94b is exhausted to the outdoor space O via the exhaust path 104, the exhaust port 98, and the duct.

[0202] During ventilation operation, as in the aforementioned embodiment and variations, the control unit C controls the ventilation unit 50 and the irradiation unit 60 in a coordinated manner. The control unit C controls the air volume of the air supply fan 92 and the air volume of the exhaust fan 93 so that the air volumes of the two are equal. In other words, the ventilation volume of the ventilation unit 50 is equal to the air volume of the air supply fan 92 and the air volume of the exhaust fan 93.

[0203] (5-3-3) Circular operation

[0204] The ventilator 90 performs a circulation operation for sterilizing the indoor air while circulating it. During the circulation operation, the controller C operates the air supply fan 92, stops the exhaust fan 93, turns on the irradiation unit 60, and opens the damper 105.

[0205] like Figure 12 As shown, during circulation operation, indoor air from indoor space I flows into third passage P3 through the duct and indoor air inlet 95. Air in third passage P3 flows into second passage P2 through damper port 106. Air in second passage P2 passes through irradiation unit 60. Ultraviolet light from the LEDs in irradiation unit 60 sterilizes the air. The air that has passed through irradiation unit 60 is then supplied to indoor space I via air supply passage 103, air supply port 96, and duct.

[0206] As described above, in the ventilator 90 , the air can be sterilized by the irradiation unit 60 not only in the ventilation operation but also in the circulation operation.

[0207] (5-4) Modification 4: Example of a ventilation system having an air conditioning unit

[0208] Figure 13 The ventilation device of Modification 4 shown constitutes a ventilation system 110. The ventilation system 110 includes a ventilation unit 50 that ventilates an indoor space I and an air conditioning unit 120 that has an irradiation unit 60. The ventilation unit 50 and the air conditioning unit 120 constitute units independent of each other. The air conditioning unit 120 adjusts air in the indoor space I.

[0209] The air conditioning unit 120 is a so-called indoor multi-type air conditioning unit that has a plurality of indoor units 30. The air conditioning unit 120 has one outdoor unit 20, but can also be a so-called outdoor multi-type air conditioning unit that has a plurality of outdoor units 20.

[0210] Each indoor unit 30 is provided, for example, at a ceiling back surface, and adjusts the temperature of air in the indoor space I. As in the above embodiment, the irradiation unit 60 and the indoor control section IC are provided in each indoor unit 30. The irradiation unit 60 irradiates ultraviolet rays to indoor air flowing inside the indoor unit 30, thereby sterilizing the air.

[0211] The outdoor unit 20 is provided outdoors. As in the embodiment, the outdoor control section OC that controls the compressor 21 and the like is provided in the outdoor unit 20. The air conditioning control section AC that controls the air conditioning unit 120 is constituted by the outdoor control section OC and the indoor control section IC.

[0212] The ventilation unit 50 simultaneously performs air supply and air exhaust of the indoor space I. The ventilation unit 50 can perform only air supply of outdoor air of the outdoor space O to the indoor space I, or can perform only air exhaust of indoor air of the indoor space I to the outdoor space O. The ventilation fan 53 and the ventilation control section VC for performing air supply and air exhaust are provided in the ventilation unit 50. The ventilation control section VC controls the ventilation fan 53.

[0213] The control section C of Modification 4 is configured to be able to communicate with the air conditioning control section AC and the ventilation control section VC by wired or wireless communication. The control section C is provided in a server device, a centralized management device of a building, or the like connected to a network. As in the above embodiment and the modifications, the control section C performs linkage control of the ventilation unit 50 and the air conditioning unit 120.

[0214] In the ventilation system 110 of Modification 4, the control section C can also be provided in the ventilation unit 50. In other words, the control section C can also be provided integrally with the ventilation control section VC. The control section C can also be provided in the air conditioning unit 120. In other words, the control section C can also be provided integrally with the air conditioning control section AC.

[0215] (6) Other Embodiments

[0216] In the above embodiment and modification, the following configuration can also be employed.

[0217] The control section 100 can also control the output of the irradiation unit 60 as the irradiation amount of the irradiation unit 60, the time for the air to pass through the irradiation region of the LED 61, the air volume of the air in the irradiation region of the LED 61, the irradiation time of the LED 61, and the like.

[0218] Here, the irradiation amount of the LED 61 is the product of the illuminance of the LED 61 and the time for the air to pass through the irradiation region of the LED 61. The passing time of the air is the reciprocal of the wind speed (linear velocity) of the air flowing in the irradiation region. The wind speed of the air is a value obtained by dividing the air volume of the air flowing in the irradiation region by the cross-sectional area of the flow path through which the air flows. For example, when the irradiation amount of the LED 61, the passing time, or the irradiation time increases, or the air volume of the air decreases, the output of the irradiation unit 60 increases. For example, when the irradiation amount of the LED 61, the passing time, or the irradiation time decreases, or the air volume of the air increases, the output of the irradiation unit 60 decreases.

[0219] The control section 100 can also control the LED 61 that is repeatedly turned on / off periodically. In this case, the control section 100 controls the output of the irradiation unit 60 as the on time for the LED 61 to be in the on state (lit state), the off time for the LED 61 to be in the off state (unlit state), the period for the LED 61 to be turned on / off periodically, the duty ratio (on time with respect to the period of on / off) of the LED 61, and the like.

[0220] The control section 100 can also control the output of the irradiation unit 60 by adjusting the circulating air volume of the air in the circulating air conditioner. The air conditioner supplies the air, which has been sucked from the object space and passed through the irradiation unit 60, to the object space again. When the circulating air volume of the air increases, the number of times the air passes through the irradiation unit 60 increases, and the output of the irradiation unit 60 increases. Conversely, when the circulating air volume of the air decreases, the number of times the air passes through the irradiation unit 60 decreases, and the output of the irradiation unit 60 decreases. Specifically, the circulating air volume of the air is the air volume of the fan provided in the air conditioner. The air conditioner referred to here includes not only a device that adjusts the temperature and humidity, but also an air cleaner.

[0221] The total ventilation volume Vt calculated by the control section C can also not be based on the forced ventilation volume V2, but the sum of the equivalent ventilation volume Ve and the ventilation volume V1 of the ventilation unit 50 can be the total ventilation volume Vt.

[0222] The control section C can also control the ventilation unit 50 and the irradiation unit 60 so that the total ventilation volume Vt reaches a prescribed value that is larger than the necessary ventilation volume Vn.

[0223] The control section C can also estimate the number of people in the indoor space I from the CO2 concentration in the indoor space I detected by the CO2 sensor, and thereby determine the necessary ventilation amount Vn.

[0224] The control section C can also correct the necessary ventilation amount Vn in accordance with the virus concentration in the indoor space I detected by the sensor. In the case where the virus concentration is high, the control section C increases the necessary ventilation amount Vn, and in the case where the virus concentration is low, the control section C decreases the necessary ventilation amount.

[0225] The ventilation unit 50 can also have an adsorption member that adsorbs moisture, and supply the outdoor air that has been humidified or dehumidified by the adsorption member to the indoor space I.

[0226] The above describes the embodiments and modified examples, but it is understood that various changes can be made to the modes and details thereof without departing from the gist and scope of the claims. The elements of the above-described embodiments, modified examples, and other embodiments can also be appropriately combined or replaced.

[0227] The words "first", "second", "third", and the like described above are used only to distinguish the sentences containing the words, and do not limit the number or order of the sentences.

[0228] - Industrial applicability -

[0229] As described above, the present disclosure is useful for a ventilation device.

[0230] - Symbol explanation -

[0231] 10 Air conditioning device (ventilation device)

[0232] 30a Indoor unit case (first unit case)

[0233] 32 Indoor heat exchanger (first heat exchanger)

[0234] 43 Air passage

[0235] 44 Connection port

[0236] 50 Ventilation unit

[0237] 51 Duct

[0238] 60 Irradiation unit

[0239] 90 Ventilation device

[0240] 94 Total heat exchanger (second heat exchanger)

[0241] 103 Supply air passage

[0242] 104 Exhaust air passage

[0243] 107 circulation passage

[0244] 110 ventilation system (ventilation device)

[0245] 120 air conditioning unit

[0246] C control section

[0247] I indoor space (target space)

[0248] O outdoor space

Claims

1. An air exchange device characterized by: the air exchange device including an air exchange unit (50), an irradiation unit (60), and a control section (C), the air exchange unit (50) performing air exchange on an object space (I), the irradiation unit (60) sterilizing air in the object space (I) with ultraviolet rays, the control section (C) performing linkage control of an air exchange amount of the air exchange unit (50) and an output of the irradiation unit (60).

2. The air exchange device according to claim 1, characterized in that: the control section (C) performs linkage control of the air exchange amount of the air exchange unit (50) and the output of the irradiation unit (60) so that the smaller the air exchange amount of the air exchange unit (50), the larger the output of the irradiation unit (60).

3. The air exchange device according to claim 1 or 2, characterized in that: the control section (C) performs linkage control of the air exchange amount of the air exchange unit (50) and the output of the irradiation unit (60) based on an air exchange amount of the object space (I) corresponding to the output of the irradiation unit (60), that is, an equivalent air exchange amount.

4. The air exchange device according to claim 3, characterized in that: the control section (C) performs linkage control of the air exchange amount of the air exchange unit (50) and the output of the irradiation unit (60) so that a total air exchange amount, which is a total air exchange amount based on a sum of the equivalent air exchange amount corresponding to the output of the irradiation unit (60) and the air exchange amount of the air exchange unit (50), reaches a necessary air exchange amount of the object space (I).

5. The air exchange device according to claim 4, characterized in that: the control section (C) controls the air exchange unit (50) so that the air exchange amount of the air exchange unit (50) reaches a target air exchange amount, the control section (C) controls the output of the irradiation unit (60) so that the total air exchange amount, which is a total air exchange amount based on a sum of the equivalent air exchange amount corresponding to the output of the irradiation unit (60) and the target air exchange amount of the air exchange unit (50), reaches the necessary air exchange amount.

6. The air exchange device according to claim 4, characterized in that: the control section (C) controls the irradiation unit (60) so that the output of the irradiation unit (60) reaches a target output, the control section (C) controls the air exchange amount of the air exchange unit (50) so that the total air exchange amount, which is a total air exchange amount based on a sum of the equivalent air exchange amount corresponding to the target output of the irradiation unit (60) and the air exchange amount of the air exchange unit (50), reaches the necessary air exchange amount.

7. The air exchange device according to any one of claims 4 to 6, characterized in that: the control section (C) determines the necessary air exchange amount based on a number of indoor people in the object space (I).

8. The air exchange device according to any one of claims 1 to 7, characterized in that: The greater the degree of degradation of the irradiation unit (60), the greater the ventilation volume of the ventilation unit (50) is caused by the control unit (C).

9. The ventilation device according to any one of claims 1 to 8, characterized in that: The ventilation device further includes a first housing (30a) and a first heat exchanger (32). An air passage (43) for allowing air in the target space (I) to flow is formed in the first housing (30a). The first heat exchanger (32) is arranged in the air passage (43), The ventilation unit (50) has a pipe (51) connecting the outdoor space (O) and the air passage (43). The irradiation unit (60) is arranged in the air passage (43) or the duct (51).

10. The ventilation device according to claim 9, characterized in that: The ventilation unit (50) is configured to discharge the air in the air passage (43) to the outdoor space (O) via the duct (51). The irradiation unit (60) is arranged in the air passage (43) at a position downstream of the connection port (44) of the duct (51) in the air flow.

11. The ventilation device according to claim 9, characterized in that: The ventilation unit (50) is configured to supply the air in the outdoor space (O) to the air passage (43) via the pipe (51). The irradiation unit (60) is arranged in the air passage (43) at a position upstream of the connection port (44) of the duct (51) in the air flow.

12. The ventilation device according to claim 9, characterized in that: The ventilation unit (50) is configured to supply the air in the outdoor space (O) to the air passage (43) via the pipe (51). The irradiation unit (60) is arranged in the air passage (43) at a position downstream of the connection port (44) of the duct (51) in the air flow.

13. The ventilation device according to claim 9, characterized in that: The irradiation unit (60) is arranged in parallel with the connection port (44) of the duct (51) in the air passage (43).

14. The ventilation device according to any one of claims 1 to 8, characterized in that: The ventilation device further includes a second housing (91) and a second heat exchanger (94). An air supply passage (103) and an exhaust passage (104) are formed in the second housing (91). The air supply passage (103) is used to supply outdoor air to the target space (I), and the exhaust passage (104) is used to exhaust the air in the target space (I) toward the outdoor space. The second heat exchanger (94) exchanges heat between the air in the air supply passage (103) and the air in the air exhaust passage (104). The irradiation unit (60) is arranged in the air supply passage (103).

15. The ventilation device according to claim 14, characterized in that: A circulation passage (107) is formed in the second housing (91), which sends air in the subject space (I) to the subject space (I), The irradiation unit (60) is arranged in the circulation passage (107).

16. The ventilation device according to any one of claims 1 to 8, characterized in that: The ventilation device includes an air conditioning unit (120) that adjusts air in the subject space (I), and the air conditioning unit (120) has the irradiation unit (60), The ventilation unit (50) is provided independently from the air conditioning unit (120).

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