WO2023112285A1

WO2023112285A1 - Blower device

Info

Publication number: WO2023112285A1
Application number: PCT/JP2021/046637
Authority: WO
Inventors: 洋平朝日; 映吾清水; 浩志郎 ▲高▼野
Original assignee: 三菱電機株式会社
Priority date: 2021-12-16
Filing date: 2021-12-16
Publication date: 2023-06-22

Abstract

This blower device comprises: an air inlet communicating with indoor space; an air outlet communicating with the indoor space; an internal air path from the air inlet to the air outlet; an electric blower that generates an airflow from the air inlet to the air outlet through the internal air path; and a UV irradiator that irradiates at least part of the internal air path with ultraviolet rays. The UV irradiator may be equipped with a heat sink and a substrate. At least part of the heat sink or at least part of the substrate may be exposed to the internal air path. This blower device may further comprise a controller that changes the average output of the UV irradiator in response to the air flow rate of the electric blower.

Description

blower

The present disclosure relates to blowers.

Patent Document 1 below proposes a method of placing an ultraviolet irradiation device and an ozone generator indoors or in a vehicle, irradiating ultraviolet rays and generating ozone to sterilize the air in the room.

Japanese Patent Laid-Open No. 03-215265

With the method proposed in Patent Document 1, it is difficult to sterilize indoor air efficiently.

The present disclosure has been made to solve the problems described above, and aims to provide an air blower that is advantageous in improving the sanitation of the indoor space.

The air blower according to the present disclosure includes an air inlet communicating with the indoor space, an air outlet communicating with the indoor space, an internal air passage from the air inlet to the air outlet, and an internal air passage from the air inlet to the air outlet. It is provided with an electric blower that generates a directed airflow and a UV irradiator that irradiates at least part of the internal air passage with ultraviolet rays.

According to the present disclosure, it is possible to provide an air blower that is advantageous in improving the hygiene of the indoor space.

FIG. 2 is a cross-sectional side view showing the air blower according to Embodiment 1; 2 is a functional block diagram of the blower device according to Embodiment 1; FIG. 3 is a diagram showing an example of a hardware configuration of a processing circuit of the air blower according to Embodiment 1; FIG. 4 is a flow chart showing an example of processing executed by the blower device according to Embodiment 1. FIG. 4 is a flow chart showing an example of processing executed by the blower device according to Embodiment 1. FIG. 4 is a flow chart showing an example of processing executed by the blower device according to Embodiment 1. FIG. 4 is a flow chart showing an example of processing executed by the blower device according to Embodiment 1. FIG. 4 is a flow chart showing an example of processing executed by the blower device according to Embodiment 1. FIG. FIG. 9 is a time chart showing an example of change in the average output of the UV irradiator and an example of change in the blowing volume of the electric blower when the flowchart of FIG. 8 is executed; FIG. FIG. 2 is a cross-sectional side view showing the air blower according to Embodiment 1; 5 is a time chart showing an example of changes in the heat radiation efficiency of the UV irradiator and an example of changes in the temperature detected by the temperature detector when the controller controls the wind direction changer according to the detection result of the temperature detector. FIG. 4 is a cross-sectional side view of the air blower provided with the mover during heating operation; FIG. 4 is a cross-sectional side view of the air blower provided with the mover during cooling operation; Fig. 3 is a side view of the mover; FIG. 4 is a cross-sectional side view of the air blower provided with a plurality of UV irradiators during heating operation; FIG. 4 is a cross-sectional side view of the air blower provided with a plurality of UV irradiators during cooling operation; 3 is a perspective view of a UV irradiator included in the air blower according to Embodiment 1. FIG. 3 is an exploded perspective view of a UV irradiator included in the air blower according to Embodiment 1. FIG. 4 is a front view of a UV irradiator included in the air blower according to Embodiment 1. FIG. 4 is a rear view of a UV irradiator included in the air blower according to Embodiment 1. FIG. FIG. 20 is a cross-sectional view of the UV irradiator included in the air blower according to Embodiment 1, taken along line BB in FIG. 19; 4 is a cross-sectional view of a UV irradiator included in the air blower according to Embodiment 1. FIG. 4 is a cross-sectional view showing a modification of the UV irradiator included in the air blower according to Embodiment 1. FIG. FIG. 10 is a cross-sectional view showing another modification of the UV irradiator included in the air blower according to Embodiment 1; FIG. 10 is a cross-sectional view showing another modification of the UV irradiator included in the air blower according to Embodiment 1; FIG. 10 is a cross-sectional view showing another modification of the UV irradiator included in the air blower according to Embodiment 1; FIG. 10 is a cross-sectional view showing another modification of the UV irradiator included in the air blower according to Embodiment 1; FIG. 4 is a cross-sectional side view showing an example of attaching a UV irradiator to a wall of an internal air passage; FIG. 10 is a cross-sectional side view showing another example of attaching the UV irradiator to the wall of the internal air passage;

Embodiments will be described below with reference to the drawings. Elements that are common or correspond to each figure are denoted by the same reference numerals, and their explanations are simplified or omitted. In addition, when referring to angles in the present disclosure, when there is a dominant angle and a minor angle whose sum is 360 degrees, in principle, it refers to a minor angle, and there are an acute angle and an obtuse angle whose sum is 180 degrees. In principle, it refers to an acute angle. In addition, the configurations shown in the embodiments shown below are examples of technical ideas according to the present disclosure, and can be combined with other known technologies, and multiple technologies described in the present disclosure can be combined. It is also possible to combine different ideas. Also, part of the configuration can be omitted or changed without departing from the gist of the present disclosure.

Embodiment 1.
FIG. 1 is a cross-sectional side view showing a blower device 1 according to Embodiment 1. FIG. As shown in FIG. 1 , the blower device 1 according to Embodiment 1 includes a main housing 2 , an electric blower 10 and a UV irradiator 23 . The body housing 2 includes an intake port 6 communicating with the indoor space, and an air outlet 7 communicating with the indoor space. An internal air passage 5 from the intake port 6 to the blowout port 7 is formed inside the main housing 2 . The electric blower 10 generates an airflow AF from the intake port 6 to the blowout port 7 through the internal air passage 5 . The electric blower 10 is arranged inside the main housing 2 . The UV irradiator 23 irradiates at least part of the internal air passage 5 with ultraviolet rays. The main housing 2 has a wall portion 3 . The wall portion 3 forms the wall surface of the internal air passage 5 . FIG. 1 corresponds to a side view of the blower device 1 . Electric blower 10 has an electric motor and a fan.

In the present disclosure, the term "blower" is used in a broad sense. The "blower" in the present disclosure may be, for example, all or part of an air cleaner, all or part of an air conditioner, all or part of a dehumidifier, or a humidifier. It may be all or part. In addition, the "blower" in the present disclosure may be all or part of a dryer, all or part of a drying device, all or part of a hand drying device, or all or part of an electric fan. It may be a unit, all or part of a heater, all or part of a moisturizing machine, or all or part of a device having a blower function.

The ultraviolet rays emitted by the UV irradiator 23 may be UVC, for example. The ultraviolet rays emitted by the UV irradiator 23 have a sterilizing effect. The light rays emitted from the UV irradiator 23 hit the inner wall surface of the internal air passage 5 and also hit the air passing through the internal air passage 5 . The surface of the internal air duct 5 irradiated with ultraviolet rays, the components formed in the internal air duct 5, and the air in the internal air duct 5 are sterilized by the ultraviolet rays from the UV irradiator 23. Components configured in the internal air duct 5 are, for example, an air filter, a fan, and the like.

In the present embodiment, by sterilizing the surface of the internal air passage 5, the components in the internal air passage 5, and the air in the internal air passage 5, the air from the air intake 6 into the main body housing 2 Air that is more hygienic than the sucked room air can be blown into the room from the outlet 7. - 特許庁Therefore, it is hygienic.

In this embodiment, an example in which the blower device 1 is used as an indoor unit of an air conditioner will be mainly described. However, the following description is similarly applicable to the above-described various blower devices 1 other than air conditioners. An upper heat exchanger 4 , an upper heat exchanger 8 , and a lower heat exchanger 9 are arranged inside the main body housing 2 . The upper heat exchanger 4, the upper heat exchanger 8, and the lower heat exchanger 9 exchange heat between the air flowing through the internal air passage 5 and the refrigerant supplied from the outdoor unit (not shown) of the air conditioner. to replace. At least part of the upper heat exchanger 8 is arranged on the front side. All or part of the lower heat exchanger 9 is arranged on the front side.

The blower device 1 in this embodiment includes a panel 17 and louvers 18 . The panel 17 forms the front surface of the main housing 2 . The louver 18 operates or rotates so as to adjust the direction of airflow blown out from the outlet 7 into the room. The louver 18 may have a rotation shaft along the left-right direction so that the blowing direction in the up-down direction can be adjusted. The louver 18 may have a rotation shaft so that the blowing direction in the horizontal direction can be adjusted. The louver 18 may have a plurality of rotating shafts so that the blowing direction in the vertical direction and the horizontal direction can be adjusted.

FIG. 2 is a functional block diagram of the blower device 1 according to the first embodiment. As shown in FIG. 2 , the blower 1 includes a controller 22 that controls the operation of the electric blower 10 and the operation of the UV irradiator 23 . At least one of the contamination level detection estimator 11, body temperature detector 12, human identifier 13, temperature detector 14, wind direction changer 15, mover 16, hand detector 21, and human detector 39, which will be described later, One may be provided in the blower device 1 .

FIG. 3 is a diagram showing an example of the hardware configuration of the processing circuit of the blower device 1 according to Embodiment 1. As shown in FIG. The functions of the controller 22 may be achieved, for example, by the processing circuitry of the hardware configuration shown in FIG. For example, the functions of controller 22 may be achieved by processor 101 shown in FIG. 3 executing a program stored in memory 102 . Also, multiple processors and multiple memories may work together to accomplish the functions of the controller 22 . Also, some of the functions of controller 22 may be implemented as electronic circuitry and other parts may be accomplished using processor 101 and memory 102 .

The UV irradiator 23 may include at least one of a heat sink 28 and a substrate 27, which will be described later. At least part of the heat sink 28 or at least part of the substrate 27 may be exposed to the internal air passage 5 . The air flowing through the internal air passage 5 can reliably cool the UV irradiator 23 . If the UV irradiator 23 does not have a heat sink 28, the substrate 27 is cooled.

In the present disclosure, the air volume generated by driving the electric blower 10 may be expressed as the air volume of the electric blower 10. The controller 22 may change the average output of the UV irradiator 23 according to the air volume of the electric blower 10 . In the present disclosure, the average output of the UV irradiator 23 may be, for example, the average output for 1 minute or the average output for 10 minutes. The controller 22 may cause the UV irradiator 23 to turn on continuously with a constant output. In that case, the average output of the UV irradiator 23 is equal to the output of the UV irradiator 23 when lit. The controller 22 may repeat turning on and off the UV irradiator 23 . In that case, the average output of the UV irradiator 23 becomes a lower value than the output of the UV irradiator 23 during lighting. Also, in that case, the average output of the UV irradiator 23 is equal to the average output of the UV irradiator 23 when it is lit and the UV irradiator 23 when it is extinguished. Moreover, the output of the UV irradiator 23 may repeat the first output and the second output, or the output of the UV irradiator 23 may change with time. Also, in that case, the average output of the UV irradiator 23 is equal to the average output in the series of UV irradiator 23 controls.

The controller 22 may make the average output of the UV irradiator 23 higher when the air volume of the electric blower 10 is relatively high than the average output of the UV irradiator 23 when the air volume of the electric blower 10 is relatively low. The UV irradiator 23 generates heat by light emission. If the UV irradiation is continued while the temperature of the UV irradiation device 23 is high, the life of the UV irradiation device 23 is shortened. That is, the time during which the UV irradiator 23 continues to emit light with high illuminance is shortened. For example, the UV irradiator 23 that can irradiate for 10000 hours under normal circumstances can irradiate for only 8000 hours. In general, the total luminous flux of the UV irradiator 23 gradually decreases as the total irradiation time increases. Generally, when the total luminous flux of the UV irradiator 23 decreases to a predetermined ratio (for example, 70%) of the total luminous flux when new, the life of the UV irradiator 23 is defined as the end. Therefore, it is difficult to continuously irradiate the UV irradiator 23 with a high output. However, when the air volume of the electric blower 10 is high, the temperature of the UV irradiator 23 can be lowered by applying a part of the air to the UV irradiator 23 to cool it. Therefore, it is possible to irradiate the UV irradiator 23 in a high output state. As a result, shortening of the life of the UV irradiator 23 can be prevented, and sanitation can be improved.

As described above, the UV irradiator 23 may repeat turning on and off at predetermined intervals. In this case, when the air volume of the electric blower 10 is high, the turn-on time becomes longer than when the air volume of the electric blower 10 is low. may be controlled.

The human detector 39 detects a presence state in which there is a person in the indoor space and an absent state in which there is no person in the indoor space. The human detector 39 may use, for example, a camera, a thermopile, a heat detection sensor, a carbon dioxide concentration detection sensor, or the like. The controller 22 may change the average output of the UV irradiator 23 according to the detection result of the human detector 39 . By changing the average output of the UV irradiator 23 depending on whether or not a person is present in the indoor space, deterioration of the life of the light source 24 of the UV irradiator 23 is suppressed while keeping the indoor space hygienic. be done. It also reduces the exposure risk of the human body. The light source 24 of the UV irradiator 23 may be hereinafter referred to as "UV light source".

In the present disclosure, the operation mode in which the UV irradiator 23 irradiates ultraviolet rays is referred to as "sterilization mode". The air conditioner of which the blower device 1 forms a part may be capable of performing cooling operation, heating operation, dehumidifying operation, blowing operation, humidifying operation, ventilation operation, cool air operation, warm air operation, and the like. The sterilization mode may be operable independently of other functions such as cooling operation, heating operation, dehumidification operation, air blowing operation, humidification operation, ventilation operation, cool air operation, warm air operation, and the like. The sterilization mode can also be used in combination with other functions such as cooling operation, heating operation, dehumidification operation, air blowing operation, humidification operation, ventilation operation, cold air operation, and warm air operation.

It is desirable that the controller 22 blows air by driving the electric blower 10 even in the sterilization mode alone. This makes it possible to sterilize the indoor space. In addition, the controller 22 may lower the air volume of the electric blower 10 when driving in the sterilization mode alone than during the air blowing operation. This enables sterilization while operating silently. In the sterilization mode, UV irradiation and air blowing may be interlocked. For example, when the UV irradiation is turned on, air blowing is started at the same time or after some time. When the UV irradiation is turned off, air blowing ends at the same time or after some time. This is not the case when used in combination with other operation modes, and ON-OFF is switched by UV irradiation alone.

FIG. 4 is a flow chart showing an example of processing executed by the blower device 1 according to the first embodiment. It is assumed that the blower 1 is powered on and the sterilization mode is selected in step S1 of FIG. When the sterilization mode is selected, the UV irradiation may be turned ON or may be turned OFF, but if the UV irradiation is ON, sterilization becomes possible immediately. Note that the blower device 1 may not be equipped with a dedicated sterilization mode. For example, the cooling function may be provided with a sterilization mode as standard. The above is common throughout the present disclosure. A cooling operation, a heating operation, a dehumidifying operation, an air blowing operation, and the like may or may not be performed while the blower 1 is powered on. When the cooling operation, heating operation, dehumidifying operation, air blowing operation, etc. are not performed, the human detector 39 is in a state of only sensing.

The process proceeds from step S1 to step S2. At step S2, the controller 22 determines whether the human detector 39 has detected the presence state. When the human detector 39 detects the presence state, the process proceeds from step S2 to step S3. In step S3, the UV irradiation of the UV irradiator 23 is turned ON, and the air blowing of the electric blower 10 is turned ON during the single operation in the sterilization mode.

In step S2, when the human detector 39 detects the absence state, the process proceeds from step S2 to step S4. In step S4, the UV irradiation of the UV irradiator 23 is turned off, and the air blowing of the electric blower 10 is turned off during the single operation in the sterilization mode. In the present disclosure, "the UV irradiation is in an OFF state" or "the UV irradiation device 23 is turned off" means not only that the average output of the UV irradiation device 23 becomes zero, but also "the UV irradiation is in an ON state" or " It also includes operating the UV illuminator 23 at a lower average output than when the UV illuminator 23 is on. In addition, in the present disclosure, “the air blowing OFF state” means not only that the output of the electric blower 10 becomes zero, but also that the electric blower 10 operates at a lower output or rotation speed than when the “air blowing ON state”. It also includes

FIG. 5 is a flowchart showing an example of processing executed by the blower device 1 according to the first embodiment. Steps S1 to S4 in FIG. 5 are the same as steps S1 to S4 in FIG. 4, so the description is simplified or omitted. When the presence of the human detector 39 is detected in step S2 of FIG. 5 and the UV irradiation is turned ON and the air blowing is turned ON in step S3, the process proceeds from step S3 to step S5. At step S5, the controller 22 determines whether the human detector 39 has detected the presence state. When the human detector 39 does not detect the presence state, that is, when the human detector 39 detects the absence state, the process proceeds from step S5 to step S6. In step S6, the controller 22 turns off the UV irradiation of the UV irradiator 23, and also turns off the blowing of the electric blower 10 during the single operation in the sterilization mode. In this way, the presence state is detected, the UV irradiation is turned ON, and if the absence state is detected after that, the UV irradiation is turned OFF after a predetermined time has elapsed. By doing so, even if the air in the indoor space cannot be sterilized while the user is present, sterilization can be continued for a predetermined period of time while the user is absent, thereby improving sanitation. In the sterilization mode independent operation, it is desirable to turn the blowing air on and off in synchronization with the UV irradiation.

The body temperature detector 12 detects the body temperature of people in the indoor space. The controller 22 may change the average output of the UV irradiator 23 according to the body temperature of people in the indoor space. A person with a high body temperature may carry bacteria or viruses that can infect others. By increasing the average output of the UV irradiator 23 when there is a person whose body temperature is higher than a predetermined body temperature, the risk of infection can be reduced. Further, when there is no longer a person whose body temperature is higher than the predetermined body temperature, the controller 22 reduces the average output of the UV irradiator 23 or turns off the UV irradiation after a predetermined period of time has elapsed.

FIG. 6 is a flowchart showing an example of processing executed by the blower device 1 according to the first embodiment. At step S7 in FIG. 6, the body temperature detector 12 detects the body temperature of the person in the room. Processing proceeds from step S7 to step S8. At step S8, the controller 22 determines whether there is a person whose body temperature is higher than a predetermined body temperature. If there is a person whose body temperature is higher than the predetermined body temperature, the process proceeds from step S8 to step S9. In step S9 , the controller 22 increases the average output of the UV irradiator 23 and increases the blowing volume of the electric blower 10 . Processing proceeds from step S9 to step S10. At step S10, the controller 22 determines whether there are still people whose body temperature is higher than the predetermined body temperature. When there is no person whose body temperature is higher than the predetermined body temperature, the process proceeds from step S10 to step S11. In step S11, the controller 22 waits for a predetermined time to pass, then turns off the UV irradiation of the UV irradiator 23 or lowers the average output, and turns off or blows air from the electric blower 10. Decrease airflow. In this manner, by irradiating UV rays for a predetermined period of time even after there is no one with a temperature higher than a predetermined temperature, sanitation can be improved.

If there is a person whose body temperature is higher than a predetermined value, the average output of the UV irradiator 23 is increased because there is a possibility that bacteria or viruses that infect humans are scattered in the air. Hygiene is improved by continuing to sterilize for a predetermined time even when a person with a high body temperature is absent. At the same time, ventilation is also continued for a predetermined time. As a result, sanitation is improved, deterioration of the UV light source is suppressed, and the risk of human exposure to radiation is reduced. If it is determined in step S10 that there are still people whose body temperature is higher than the predetermined body temperature, the process proceeds from step S10 to step S12. In step S12, the average output of the UV irradiator 23 is maintained, and the blowing volume of the electric blower 10 is maintained. The process returns from step S12 to step S10.

The human identifier 13 identifies a person in the indoor space. Body temperature detector 12 detects the body temperature of the individual identified by person identifier 13 . The controller 22 may memorize the normal body temperature of the individual identified by the person identifier 13 by daily recording the body temperature of the individual. The controller 22 may increase the average power of the UV irradiator 23 if the current body temperature of the individual identified by the person identifier 13 is higher than that individual's normal body temperature. In this way, by identifying a person and memorizing their normal body temperature, it is possible to more accurately determine whether the body temperature is higher or lower than the normal body temperature. Therefore, sanitation is improved, deterioration of the UV light source is suppressed, and the risk of human exposure to radiation is reduced.

The human identifier 13 may identify or record features such as a face or body shape as a method of identifying a person. In addition, the person identification device 13 may identify or record an employee ID card, a business card, a name tag, or the like. Also, the person identifier 13 may record a pattern such as a bar code or two-dimensional code for identification, or an identifier. For example, if an employee ID card, business card, name tag, or the like has a pattern such as a bar code or two-dimensional code, the person identifier 13 can identify the person. The controller 22 determines whether the body temperature of the identified person is higher than the body temperature when identified in the past.

FIG. 7 is a flow chart showing an example of processing executed by the blower device 1 according to the first embodiment. At step S13 in FIG. 7, the human identifier 13 determines whether or not there is a person in the room. If there is a person in the room, the process proceeds from step S13 to step S14. At step S14, the person identifier 13 determines whether or not the person in the room can be identified. If the person in the room can be identified, the process proceeds from step S14 to step S15. At step S15, the controller 22 determines whether the identified individual's current body temperature is higher than the individual's normal body temperature. If the identified individual's current body temperature is higher than the individual's usual body temperature, processing proceeds from step S15 to step S16. In step S16 , the controller 22 increases the average output of the UV irradiator 23 and increases the blowing volume of the electric blower 10 . A person with a higher than normal body temperature may be infected with the virus. By increasing the average output of the UV irradiator 23 when such people are present, it is possible to clean the room and suppress infection to the surrounding people. If the current body temperature of the individual identified in step S14 is not higher than the individual's usual body temperature, processing proceeds from step S15 to step S17. In step S17, the controller 22 waits for a predetermined time to pass, then turns off the UV irradiation of the UV irradiator 23 or lowers the average output, and turns off or blows air from the electric blower 10. Decrease airflow.

The controller 22 may be configured to increase the average output of the UV irradiator 23 when the detection result of the human detector 39 changes from the presence state to the absence state. When the human detector 39 detects the presence of a person and then detects the absence of a person, the controller 22 may increase the average output of the UV irradiator 23 after a predetermined period of time has elapsed. By increasing the average output of the UV irradiator 23 when the user is absent, sterilization can be performed in a short time while suppressing the risk of exposure to the human body. After sterilizing for a predetermined period of time, controller 22 reduces the average power of UV irradiator 23 . By doing so, sanitation is improved, deterioration of the UV light source is suppressed, and the risk of human exposure to radiation is reduced.

FIG. 8 is a flowchart showing an example of processing executed by the blower device 1 according to the first embodiment. FIG. 9 is a time chart showing an example of changes in the average output of the UV irradiator 23 and an example of changes in the blowing volume of the electric blower 10 when the flowchart of FIG. 8 is executed.

At step S18 in FIG. 8, when the human detector 39 confirms the existence of a person in the room, the process proceeds from step S18 to step S19. In step S19, UV irradiation by the UV irradiator 23 and air blowing by the electric blower 10 are performed. When people are present, safety is emphasized, and the controller 22 may lower the average output of the UV irradiator 23 and increase the amount of air blown by the electric blower 10 . Processing proceeds from step S19 to step S20. In step S20, when the human detector 39 confirms that no one is in the room, the process proceeds from step S20 to step S21. In step S21 , the controller 22 increases the average output of the UV irradiator 23 and increases the amount of air blown by the electric blower 10 . In this way, when the person is gone, the controller 22 performs control with an emphasis on sterilization power.

The process proceeds from step S21 to step S22. At step S22, the controller 22 determines whether a predetermined period of time has elapsed. After the predetermined time has passed, the process proceeds from step S22 to step S23. In step S23 , the controller 22 reduces the average output of the UV irradiator 23 and reduces the amount of air blown by the electric blower 10 . Processing proceeds from step S23 to step S24. At step S24, the controller 22 again determines whether the predetermined time has elapsed. After a predetermined period of time has elapsed, the process proceeds from step S24 to step S25. In step S25 , the controller 22 reduces the average output of the UV irradiator 23 and reduces the amount of air blown by the electric blower 10 . In this way, the life of the UV light source can be extended by lowering the average output of the UV irradiator 23 and the amount of air blown by the electric blower 10 over time after the person is gone. In the present disclosure, the amount of air blown by the electric blower 10 may be simply referred to as “air volume”.

According to the control of FIGS. 8 and 9, while suppressing the influence on the human body when UV leaks out of the main body housing 2, the average output of the UV irradiator 23 and the By increasing the air volume of the electric blower 10, sanitation can be improved. As described above, when the absent state continues for a predetermined time, the average output of the UV irradiator 23 may be decreased or the air volume of the electric blower 10 may be decreased. The reduction in the average output of the UV irradiator 23 and the reduction in the air volume may be reduced all at once, may be gradually reduced over time, or may be reduced in stages. Moreover, the average output of the UV irradiator 23 and the air volume do not necessarily need to be raised and lowered at the same time, and the timing may be different. In addition, the average output of the UV irradiator 23 and the air volume are increased and decreased in different directions, such as increasing the average output of the UV irradiator 23 to decrease the air volume, or decreasing the average output of the UV irradiator 23 to increase the air volume. may be For example, by increasing the air volume while decreasing the average output of the UV irradiator 23, it is possible to maintain or improve the sterilization performance while ensuring safety for humans. By increasing the average output of the UV irradiator 23 while decreasing the air volume, it is possible to maintain or improve the sterilization performance while reducing the noise.

In FIG. 9, the average output of the UV irradiator 23 and the air volume are respectively "a", "b", "c", "d", "e", "f", "g", and "h". , 'i', 'j', 'k', 'm', 'n'.

The contamination degree detection estimator 11 detects or estimates the degree of contamination of the air in the indoor space. The controller 22 may change the average output of the UV irradiator 23 according to the degree of contamination. The contamination level detection estimator 11 may detect, for example, the number of people in the room, or may detect the carbon dioxide concentration in the room. The contamination degree detection estimator 11 may be, for example, a camera, a thermopile, a heat detection sensor, a carbon dioxide concentration detection sensor, or the like. For example, when there are many people in the indoor space, the contamination level detection and estimator 11 detects that the contamination level is high, or estimates that the contamination level will be high. The contamination level detection estimator 11 determines that the contamination level is high when the carbon dioxide concentration is high. When the contamination level detection estimator 11 detects that the contamination level is high or estimates that the contamination level is high, the controller 22 controls the average output of the UV irradiator 23 to be increased. Conversely, when the contamination level detection estimator 11 detects that the contamination level is low or estimates that the contamination level is low, the controller 22 controls the average output of the UV irradiator 23 to be low. Also, the air volume may be changed according to the average output of the UV irradiator 23 . The risk of viral infection increases when there are many people in the room or when the carbon dioxide concentration in the room is high. A high carbon dioxide concentration corresponds to a large number of people in the room. The indoor air can be made clean by increasing the average output of the UV irradiator 23 when it is determined that there are many people in the room. By increasing the air volume while increasing the average output of the UV irradiator 23, the amount of air that can be sterilized increases, and the sterilization efficiency can be further enhanced.

At least part of the UV irradiator 23 may be exposed to the internal air passage 5. Preferably, the heat sink 28 or substrate 27 of the UV irradiator 23 is exposed to the internal air passage 5 . A temperature detector 14 detects the temperature of the UV irradiator 23 . The temperature detector 14 detects the temperature of the UV irradiator 23, particularly the substrate 27 or the temperature of the UV light source.

The air direction changer 15 changes the direction of the airflow AF in the internal air passage 5. 10 is a cross-sectional side view showing the blower device 1 according to Embodiment 1. FIG. FIG. 10 shows a state in which the airflow direction changer 15 changes the direction of the airflow AF in the internal air passage 5 so that the airflow AF hits the UV irradiator 23 more strongly than in FIG.

The controller 22 may change the direction of the airflow AF in the internal air passage 5 by using the air direction changer 15 according to the temperature of the UV irradiator 23 . As a result, the temperature rise of the UV irradiator 23 can be suppressed more reliably, and the life of the UV light source can be extended.

The temperature detector 14 may use, for example, an IC sensor, a thermistor, an RTD, a thermocouple, or the like. The wind direction changer 15 may be provided so as to be able to change the direction of the airflow that has flowed in from the intake port 6 . The wind direction changer 15 may have, for example, a plurality of thin plate-like members arranged parallel to each other and change the direction of these thin plate-like members. In the illustrated example, the wind deflector 15 is arranged near the air intake 6 . The arrangement of the wind direction changer 15 is not limited to the vicinity of the intake port 6 . Any configuration and arrangement of the wind direction changer 15 may be used as long as the configuration and arrangement of the wind direction changer 15 change how the wind hits the UV irradiator 23 .

The controller 22 controls the wind direction changer 15 according to the detection result of the temperature detector 14 . The controller 22 controls the wind direction changer 15 when the temperature detected by the temperature detector 14 is higher than a predetermined temperature. When the temperature detected by the temperature detector 14 is higher than a predetermined temperature, the controller 22 causes the UV irradiator 23 to receive more wind than when the temperature detected by the temperature detector 14 is lower than the predetermined temperature. , the wind direction changer 15 is controlled. When the temperature detected by the temperature detector 14 is higher than a predetermined temperature, the controller 22 causes more wind to hit the heat sink 28 or the substrate 27 than when the temperature detected by the temperature detector 14 is lower than the predetermined temperature. The wind direction changer 15 is controlled as follows. The air deflector 15 may be controlled to direct the airflow towards the UV irradiator 23 .

In the present disclosure, the efficiency with which the heat of the UV irradiator 23 is dissipated is referred to as "heat dissipation efficiency". As an example, the higher the air volume hitting the UV irradiator 23, the higher the heat radiation efficiency. FIG. 11 shows an example of changes in the heat dissipation efficiency of the UV irradiator 23 and changes in the temperature detected by the temperature detector 14 when the controller 22 controls the wind direction changer 15 according to the detection result of the temperature detector 14. 4 is a time chart showing an example;

A description will be given below based on the example of FIG. When the temperature detected by the temperature detector 14 exceeds the (first) predetermined temperature at time T1, the controller 22 controls the wind direction changer 15 so that more wind hits the UV irradiator 23. . After that, when the temperature detected by the temperature detector 14 becomes lower than the second predetermined temperature at time T2, the controller 22 controls the wind direction changer 15 again to increase the amount of air hitting the UV irradiator 23. may be lowered. The second predetermined temperature is a value lower than the (first) predetermined temperature. The heat dissipation efficiency of the UV irradiator 23 after time T2 may be equal to the heat dissipation efficiency before time T1 when the first predetermined temperature is reached. Alternatively, the heat radiation efficiency of the UV irradiator 23 after the time T2 is higher than the heat radiation efficiency before the time T1 when the first predetermined temperature is reached, and the heat radiation efficiency is higher than the heat radiation efficiency before the time T1 when the first predetermined temperature is reached. It may be a value lower than the heat dissipation efficiency up to. In the latter case, the temperature rise of the UV irradiator 23 can be more reliably prevented, and the life of the UV light source can be more reliably extended.

The controller 22 may change the air volume of the electric blower 10 according to the detection result of the temperature detector 14. The controller 22 may increase the air volume of the electric blower 10 when the temperature detected by the temperature detector 14 is higher than the (first) predetermined temperature. Further, after the temperature detected by the temperature detector 14 exceeds the (first) predetermined temperature and the air volume of the electric blower 10 is increased, the temperature detected by the temperature detector 14 becomes lower than the second predetermined temperature. In that case, the controller 22 may reduce the air volume of the electric blower 10 . The air volume at this time may be the same as the air volume before the temperature detected by the temperature detector 14 reaches the first predetermined temperature, or the temperature detected by the temperature detector 14 may be the same as the air volume when the temperature detected by the temperature detector 14 reaches the first predetermined temperature. It may be a value that is higher than the air volume before reaching and lower than the air volume after the temperature detected by the temperature sensor 14 reaches the first predetermined temperature. In the latter case, the temperature rise of the UV irradiator 23 can be more reliably prevented, and the life of the UV light source can be more reliably extended.

The blower device 1 may include a mover 16 that moves the UV irradiator 23 between the first position and the second position. FIG. 12 is a cross-sectional side view of the air blower 1 having the mover 16 during heating operation. FIG. 13 is a cross-sectional side view of the air blower 1 having the mover 16 during cooling operation. 14 is a side view of the mover 16. FIG.

At the time of FIG. 12, the UV irradiator 23 is at the first position. The first position is in the air path from the air intake 6 to the upper heat exchanger 4 . The first position is in the air passage upstream of the upper heat exchanger 4 in the internal air passage 5 . The first position is the same position as the UV illuminator 23 in FIGS.

At the time of FIG. 13, the UV irradiator 23 is at the second position. A second position is in the air path from the upper heat exchanger 4 to the outlet 7 . The second position is in the air passage downstream of the upper heat exchanger 4 in the internal air passage 5 .

The heat dissipation efficiency of the UV irradiator 23 at the first position and the heat dissipation efficiency of the UV irradiator 23 at the second position have different values. For example, the heat radiation efficiency may differ due to the difference in the amount of air hitting the UV irradiator 23 at the first position and the amount of air hitting the UV irradiator 23 at the second position. Alternatively, the heat dissipation efficiency may differ due to the difference in the temperature of the air hitting the UV irradiator 23 at the first position and the temperature of the air hitting the UV irradiator 23 at the second position.

The controller 22 may move the UV irradiator 23 between the first position and the second position using the mover 16 according to the temperature of the UV irradiator 23 . For example, when the temperature of the UV irradiator 23 rises and the temperature of the UV irradiator 23 exceeds the first predetermined temperature, the wind blows to the UV irradiator 23 between the first position and the second position. The UV irradiator 23 may be moved to a position where it hits more strongly. As a result, the heat dissipation efficiency is increased, the temperature rise of the UV irradiator 23 can be more reliably prevented, and the life of the UV light source can be more reliably extended. Based on the same idea as the example of FIG. 11, the controller 22 causes the mover 16 to move the UV irradiator 23 between the first position and the second position according to the temperature of the UV irradiator 23. , may be moved.

The controller 22 may move the UV irradiator 23 to the first position by the mover 16 during the heating operation, and move the UV irradiator 23 to the second position by the mover 16 during the cooling operation. . During heating operation, the temperature of the air at the first location is lower than the temperature of the air at the second location. During cooling operation, the temperature of the air at the second location is lower than the temperature of the air at the first location. By moving the UV irradiator 23 to a position where the temperature of the air is lower, the heat radiation efficiency is increased, the temperature of the UV irradiator 23 can be lowered, and the life of the UV light source can be extended more reliably. The timing of movement may be, for example, the timing of switching between cooling operation and heating operation. Alternatively, when the heating operation is switched to the cooling operation, it is desirable to move the UV irradiator 23 at the timing when a predetermined time has passed. The UV irradiator 23 may be moved immediately after switching from the power OFF state or the fan operation state to the heating operation or the cooling operation. However, when the heating mode is switched to the cooling mode, it is desirable to move after a predetermined period of time, because if the mode is switched from the heating mode to the cooling mode, the destination will be hot if the mode is moved immediately.

The moving direction of the UV irradiator 23 by the mover 16 may be the optical axis direction of the UV irradiator 23 or the direction perpendicular to the optical axis. The position to which the UV irradiator 23 is moved by the mover 16 may be more than two. The UV irradiator 23 moves, for example, in one axis. The UV irradiator 23 moves vertically or horizontally, for example. The UV irradiator 23 moves, for example, in the front-rear direction or in the left-right direction. In this embodiment, the UV irradiator 23 moves vertically. The mover 16 may be configured using at least one of, for example, a linear actuator, a fluid pressure cylinder, a rack and pinion, a feed screw, and a link mechanism.

The blower device 1 may include a plurality of UV irradiators 23. FIG. 15 is a cross-sectional side view of the air blower 1 having a plurality of UV irradiators 23 during heating operation. FIG. 16 is a cross-sectional side view of the air blower 1 having a plurality of UV irradiators 23 during cooling operation.

15 and 16 includes a first UV irradiator 23A and a second UV irradiator 23B as the plurality of UV irradiators 23. The first UV irradiator 23A and the second UV irradiator 23B may be the same. The same light source, wavelength, specifications, model number, etc. may be used for the first UV irradiator 23A and the second UV irradiator 23B. A first UV irradiator 23A is arranged in the air passage from the intake port 6 to the upper heat exchanger 4 . That is, the first UV irradiator 23A is arranged at the first position described above. A second UV irradiator 23B is arranged in the air passage from the upper heat exchanger 4 to the outlet 7 . That is, the second UV irradiator 23B is arranged at the second position described above. Also, the first UV irradiator 23A is arranged upstream of at least one of the upper heat exchanger 8 and the lower heat exchanger 9 . Also, the second UV irradiator 23B is arranged downstream of at least one of the upper heat exchanger 8 and the lower heat exchanger 9 . Also, the first UV irradiator 23A is arranged upstream of the upper heat exchanger 8 and the lower heat exchanger 9 . Also, the second UV irradiator 23B is arranged downstream of the upper heat exchanger 8 and the lower heat exchanger 9 .

The controller 22 turns on the first UV irradiation device 23A and turns off the second UV irradiation device 23B during the heating operation, and turns off the first UV irradiation device 23A and turns off the second UV irradiation device 23B during the cooling operation. may be configured to light up. During heating operation, the temperature of the air at the position of the first UV irradiator 23A is lower than the temperature of the air at the position of the second UV irradiator 23B. During cooling operation, the temperature of the air at the position of the second UV irradiator 23B is lower than the temperature of the air at the position of the first UV irradiator 23A. Of the first UV irradiator 23A and the second UV irradiator 23B, the UV irradiator 23 with the lower air temperature is turned on, and the UV irradiator 23 with the higher air temperature is turned off. is increased, the temperature of the UV irradiator 23 can be lowered, and the life of the UV light source can be extended more reliably. Further, as already described, "the UV irradiation device 23 is turned off" means not only that the average output of the UV irradiation device 23 becomes zero, but also that "the UV irradiation is in an ON state" or "the UV irradiation device 23 is turned on". It also includes operating the UV irradiator 23 at a lower average power than when. That is, both the first UV irradiator 23A and the second UV irradiator 23B may be lit. In this case, by making the average output of the UV irradiator 23 with the higher air temperature lower than the average output of the UV irradiator 23 with the lower air temperature, the heat dissipation efficiency is increased, and the UV irradiator 23 temperature can be lowered, and the life of the UV light source can be extended more reliably.

The blower device 1 according to the present disclosure may include a heat source (not shown) arranged in the internal air passage 5 . The heat source may be, for example, an electric heater, a heating wire, a heating element, or the like. The heat source may include a heat exchanger. The air blower 1 provided with a heat source may carry out a hot air operation in which hot air heated by the heat source is blown out from the outlet 7 . The controller 22 may perform the same or similar control as described above during the warm air operation instead of the above control during the heating operation. The temperature of the air is higher downstream or downwind from the heat source. Also, the temperature of the air at the second location is higher than the temperature of the air at the first location. Also, the temperature of the air at a second location downstream or downwind from the heat source is higher than the temperature of the air at a first location upstream or upwind from the heat source. During hot air operation, the controller 22 may move the UV irradiator 23 to the first position by the mover 16 . Further, the controller 22 may be configured to turn on the first UV irradiator 23A and turn off the second UV irradiator 23B during the warm air operation. Further, during hot air operation, the controller 22 makes the average output of the second UV irradiator 23B lower than the average output of the first UV irradiator 23A, or turns off the second UV irradiator 23B. may be configured to As a result, the heat dissipation efficiency is increased, the temperature of the UV irradiator 23, the first UV irradiator 23A, and the second UV irradiator 23B can be lowered, and the life of the UV light source can be extended more reliably.

The blower device 1 according to the present disclosure may include a cold source (not shown) arranged in the internal air passage 5 . A cold source is defined as a word paired with a heat source. The cold source may include, for example, ice, dry ice, water, a refrigerant, a coolant, or the like, or may be electrically cooled by a Peltier element or the like. The cold source may include a heat exchanger. The air blower 1 provided with a cold source may perform cold air operation in which cool air cooled by the cold source is blown out from the outlet 7 . The controller 22 may perform the same or similar control as described above during cooling operation instead of the above control during cooling operation. The temperature of the air is lower downstream or downwind from the cold source. Also, the temperature of the air at the second location is lower than the temperature of the air at the first location. Also, the temperature of the air at a second location downstream or downwind from the cold source is lower than the temperature of the air at a first location upstream or upwind from the cold source. During cold air operation, controller 22 may move UV irradiator 23 to a second position by mover 16 . Further, the controller 22 may be configured to turn off the first UV irradiator 23A and turn on the second UV irradiator 23B during cold wind operation. As a result, the heat dissipation efficiency is increased, the temperature of the UV irradiator 23, the first UV irradiator 23A, and the second UV irradiator 23B can be lowered, and the life of the UV light source can be extended more reliably.

Also, the blower device 1 according to the present disclosure may be provided with a plurality of temperature detectors 14 . For example, a plurality of temperature detectors 14 included in the blower 1 may detect the temperature of the first UV irradiator 23A and the temperature of the second UV irradiator 23B. The air blower 1 may include a first temperature detector 14A that detects the temperature of the first UV irradiator 23A and a second temperature detector 14B that detects the temperature of the second UV irradiator 23B.

The controller 22 controls the average output of the first UV irradiator 23A and the average output of the second UV irradiator 23B according to the detection results of one or more temperature detectors 14, using a combination of the techniques described above. You may In this case, the controller 22 makes the average output of the UV irradiator 23 with relatively or absolutely higher air temperature lower than the average output of the other UV irradiator 23 . Alternatively, the controller 22 lowers the average output of the UV irradiator 23 whose temperature detected by the temperature detector 14 is relatively or absolutely higher than the average output of the other UV irradiator 23 . For example, when comparing the temperature of the first UV irradiator 23A detected by the first temperature detector 14A and the temperature of the second UV irradiator 23B detected by the second temperature detector 14B, It is determined whether the temperature difference is higher than a predetermined value or by what the temperature ratio is.

The controller 22 determines the average temperature of the second UV irradiator 23B according to the temperature of the second UV irradiator 23B detected by the second temperature detector 14B during heating operation, cooling operation, hot air operation, or cold air operation. It may be configured to vary the output. Alternatively, the controller 22 detects the temperature of the second UV irradiator 23B detected by the second temperature detector 14B and the temperature of the second UV irradiator 23B detected by the first temperature detector 14A during heating operation, cooling operation, hot air operation, or cold air operation. The average output of at least one of the average output of the second UV irradiator 23B and the average output of the first UV irradiator 23A is changed according to the temperature of the first UV irradiator 23A. may be

According to these controls described above, the heat dissipation efficiency is increased, the temperature of the UV irradiator 23 can be lowered, and the life of the UV light source can be more reliably extended. Further, when the controller 22 controls the average output of the first UV irradiator 23A and the average output of the second UV irradiator 23B, when the average output of one is lowered, the average output of the other is raised. may Preferably, the controller 22 increases the average power of the other while having less impact on the life of the UV light source. As a result, deterioration in sterilization performance can be suppressed.

Also, when switching from cooling operation, cold air operation, heating operation, or hot air operation to another operation, or when the detection result of the temperature detector 14, the first temperature detector 14A, or the second temperature detector 14B changes. In some cases, the controller 22 may change the average output of the UV irradiator 23, the first UV irradiator 23A, or the second UV irradiator 23B accordingly. As a result, the life of the UV light source can be extended more reliably.

Below, the blower device 1 of the present embodiment will be further described, particularly focusing on the UV irradiator 23 . The UV irradiator 23 comprises a light source 24 that produces light. The UV irradiator 23 irradiates the internal air passage 5 with the light generated by the light source 24 .

The UV irradiator 23 irradiates ultraviolet rays. UV is an abbreviation for Ultra Violet. That is, the UV irradiator 23 is a device that irradiates ultraviolet rays. In general, ultraviolet light is a general term for light with a shorter wavelength than visible light, and is an electromagnetic wave with a wavelength of approximately 1 nm to 400 nm. Generally, the wavelength range from 100 nm to 280 nm is called UVC, the wavelength range from 280 nm to 315 nm is called UVB, and the wavelength range from 315 nm to 400 nm is called UVA.

In the present disclosure, "microorganisms" include at least one of bacteria and viruses. Some microorganisms are harmful to humans. Ultraviolet rays act on microorganisms. In the present disclosure, sterilization by ultraviolet light means that the deoxyribonucleic acid (hereinafter referred to as "DNA") of microorganisms is acted upon by light energy to render the microorganisms in an inactivated state where they cannot proliferate any more. Or defined as reducing the number of microorganisms. In addition, in the present disclosure, it may be expressed as inactivation≈sterilization. It is generally said that UVB has a higher ability to inactivate microorganisms than UVA, and UVC has an even higher ability to inactivate microorganisms than UVB. In particular, UVC wavelengths have a high ability to directly destroy DNA, thereby inactivating microorganisms at a high rate. Furthermore, in the UVC region, wavelengths of 200 nm to 285 nm have particularly high sterilizing power. More specifically, it is said to have high sterilizing power at wavelengths centered around 222 nm and 260 nm.

The dominant wavelength of the UV irradiator 23 is ultraviolet rays. In other words, among the rays emitted by the UV irradiator 23, the wavelength with the highest output, ie, the highest radiation intensity, is ultraviolet rays. According to the present embodiment, by irradiating the surface of the internal air passage 5 with ultraviolet rays from the UV irradiator 23, the microorganisms adhering to the surface of the internal air passage 5 can be sterilized.

The light source 24 of the UV irradiator 23 in this embodiment is a light emitting diode (LED). In other words, the light source 24 is an LED that produces ultraviolet light, hereinafter referred to as UV-LED. UV-LEDs do not contain mercury. Mercury in general is toxic and has a bad side to the environment. Since UV-LEDs do not contain mercury, they are highly safe and have little risk of adversely affecting the environment. UV-LEDs, for example, are high power at only a single wavelength. Among the light generated by the light source 24, the wavelength with the highest radiant intensity is hereinafter referred to as the "dominant wavelength". The dominant wavelength of light generated by light source 24 may be in any of the UVA, UVB, and UVC bands. In particular, it is desirable that the dominant wavelength of the light generated by the light source 24 is in the UVC region, which has high sterilizing power.

When enhancing the sterilization power, the dominant wavelength of the light generated by the light source 24 is preferably between 220 nm and 280 nm. More preferably, the dominant wavelength of light generated by light source 24 is in the range of 220 nm to 225 nm, or in the range of 250 nm to 285 nm. More preferably, the dominant wavelength of light generated by light source 24 is in the range of 255 nm to 280 nm. Since the sterilization power is particularly high within the above wavelength range, sterilization can be efficiently performed in a relatively short period of time, with relatively low output, or with a relatively small number of light sources 24 . The preferred wavelength range is the same for UV-lamps, which will be described later.

The light source 24 of the UV irradiator 23 may be a lamp instead of an LED. Also, the light source 24 may contain mercury or may not contain mercury (mercury-free). Those containing mercury have high sterilizing power due to their high efficiency and output. Mercury-free lamps are also highly safe and have a low risk of adversely affecting the environment.

In general, ultraviolet rays are invisible wavelengths. Although the dominant wavelength of the light generated by the light source 24 of the present embodiment is in the ultraviolet region, the light generated by the light source 24 may include wavelengths in the visible light region. For example, light source 24 may produce blue or violet visible light along with ultraviolet light. Visible light is light that can be seen by the human eye. In the present disclosure, a person in the indoor space may be called a "person in the room". For example, when the light from the light source 24 is emitted, the person in the room can identify the color of the emitted light. For example, when looking at the light source 24, or when looking at the light beam, or when the light beam is projected onto an object, the person in the room can identify what color the projected light is. A person in the room can distinguish, for example, whether the emitted light is red, blue, or purple. This makes it possible to determine whether the light source 24 is on or off. For example, if it is found that the light source 24 is not lit when it should be lit, a failure is suspected. In other words, failures can be discovered early. In addition, depending on the specification of the UV irradiator 23, it is harmful to the human body, so that the light source 24 is turned on when a person is present in the room may not be the original specification. In such a specification, if the light source 24 is lit when there is a person in the room, it can be decided to stop using it. The color of the internal air duct 5 when the light source 24 is on or the color of the light emitted from the UV irradiator 23 and the color of the internal air duct 5 or the color of the light emitted from the UV irradiator 23 when the light source 24 is off The effect described above can be achieved by making the color of the emitted light different.

The blower device 1 includes one or more UV irradiators 23. The blower device 1 may include multiple UV irradiators 23 . Also, one UV irradiator 23 may have only one light source 24 , or one UV irradiator 23 may have a plurality of light sources 24 . Also, a plurality of UV irradiators 23 may be provided with a plurality of light sources 24 . When the blower device 1 includes a plurality of light sources 24, each light source 24 may have the same dominant wavelength, or each light source 24 may have different dominant wavelengths. If a plurality of light sources 24 having the same dominant wavelength, for example, a plurality of light sources 24 having the same specifications are used, the unit price may be reduced. Also, if multiple light sources 24 with different dominant wavelengths are used, the sterilization speed may be faster. For example, when three light sources 24 with dominant wavelengths of 260 nm, 265 nm, and 275 nm are used, the sterilization speed is said to be faster than when three light sources 24 with dominant wavelengths of 265 nm are used. This allows more efficient sterilization.

A member for transmitting light rays including ultraviolet rays emitted from the light source 24 is called a window portion 26 . Details of the window portion 26 will be described later. Both the light source 24 and the window portion 26 or either one of the light source 24 and the window portion 26 are arranged at a position that cannot be visually recognized when the blower device 1 is viewed from the front. Both the light source 24 and the window portion 26 or either one of the light source 24 and the window portion 26 are arranged at a position that cannot be visually recognized in a side view of the exterior of the air blower 1 . Both the light source 24 and the window portion 26 or either one of the light source 24 and the window portion 26 are arranged at a position that cannot be visually recognized when the blower device 1 is viewed from above. Both the light source 24 and the window portion 26 or either one of the light source 24 and the window portion 26 are arranged at a position that cannot be visually recognized when the blower device 1 is viewed from the bottom. In the present disclosure, both the light source 24 and the window portion 26 or either one of the light source 24 and the window portion 26 cannot be visually recognized. 26 or either one of the light source 24 and the window 26 are arranged. In the present embodiment, in the external appearance of the blower 1, both the light source 24 and the window 26, or Either one of the light source 24 and the window portion 26 is covered with the main housing 2, so that either the light source 24 and the window portion 26 or either the light source 24 and the window portion 26 cannot be visually recognized. This reduces the possibility that a person in the room will look directly at both the light source 24 and the window 26, or either the light source 24 and the window 26, and also reduces the risk of light entering the eye. It is possible and safe.

The light beam emitted from the light source 24 is arranged so that the area behind and above the light source 24 is not irradiated. That is, the area behind and above the light source 24 is not included in the beam angle range. As a result, it is possible to reduce the risk of radiation exposure to people in the vicinity. In particular, it is possible to reduce the irradiation risk for the person in the room holding the blower 1 .

Both the light source 24 and the window part 26, or either one of the light source 24 and the window part 26 may be arranged at a position that cannot be visually recognized when viewed from the horizontal direction. Moreover, both the light source 24 and the window 26, or either one of the light source 24 and the window 26 may be arranged at a position that cannot be visually recognized from any direction from 0 degrees to 360 degrees in the horizontal direction. good. That is, both the light source 24 and the window portion 26 or either one of the light source 24 and the window portion 26 is covered with the main body housing 2 when the blower device 1 is viewed from any direction perpendicular to the vertical line. You may allow This can reduce the possibility that the person in the room will look directly at both the light source 24 and the window 26, or either the light source 24 and the window 26, and also reduce the risk of light rays entering the eye. can be done and is very safe.

Further, in the air blower 1 of the present embodiment, the light source 24 and the UV irradiator 23 are not visible even when the air blower 1 is viewed from the outside of the main body housing 2 with a line of sight in all directions in the three-dimensional space. , the light source 24 and the UV irradiator 23 are covered by the main housing 2. As shown in FIG. In other words, assuming that the light source 24 or the UV irradiator 23 emits light in all directions in the three-dimensional space, the The light source 24 and the UV irradiator 23 are covered with the main housing 2 . As a result, the risk of the light beam from the light source 24 entering the eye can be more reliably reduced, and the safety is even higher.

Further, the air blower 1 of the present embodiment is configured such that the light source 24 is not visible even when the air blower 1 is viewed from outside the main body housing 2 with a line of sight in all directions in a three-dimensional space. is covered by the main housing 2 . In other words, assuming that the light source 24 emits light in all directions in a three-dimensional space, the light source 24 is positioned within the main body housing 2 so that no light beam directly exits the main body housing 2 from the light source 24. It is covered by body 2. As a result, the risk of the light beam from the light source 24 entering the eye can be more reliably reduced, and the safety is even higher.

Both the light source 24 and the window portion 26, or either one of the light source 24 and the window portion 26, do not necessarily have to be arranged at positions that are not visible from all the above-described directions. However, it is desirable that both the light source 24 and the window 26 or either one of the light source 24 and the window 26 be placed at a position that is difficult to see as much as possible.

In the present embodiment, the light source 24 has, for example, a cuboid shape. The shape of the light source 24 in the present disclosure is not particularly limited, and may be, for example, a cylindrical shape or a cannonball shape. The cannonball shape is, for example, a shape obtained by joining a hemispherical shape and a cylindrical shape.

The light source 24 emits a myriad of rays radially around the optical axis. For example, when the light source 24 is a rectangular parallelepiped, the optical axis is a direction parallel to the thickness direction of the rectangular parallelepiped. The thickness direction is the direction with the smallest dimension when the rectangular parallelepiped has three directions of the width direction, the depth direction, and the thickness direction. The beam angle of the light source 24 may be, for example, 30 degrees to 150 degrees, or 360 degrees. The beam angle of light source 24 is preferably between 50 degrees and 140 degrees. A beam angle of 30 degrees indicates, for example, a direction inclined by 15 degrees to one side from the optical axis when viewed from a direction perpendicular to the optical axis. The beam angle is, for example, the angle at which the radiant intensity is 50% when the radiant intensity in the direction of the optical axis is 100%. For example, a beam angle of 30 degrees means that when viewed from a direction perpendicular to the optical axis, the radiant intensity at a position inclined 15 degrees to one side from the optical axis is 50% of the radiant intensity in the optical axis direction. indicates If the beam angle is too small, there is a possibility that only part of the internal air passage 5 can be illuminated. If the beam angle is too wide, there is a possibility that the amount of irradiation outside the internal air duct 5 will increase. Therefore, it is desirable that the beam angle is neither too small nor too large.

FIG. 17 is a perspective view of the UV irradiator 23 included in the air blower 1 according to Embodiment 1. FIG. FIG. 18 is an exploded perspective view of the UV irradiator 23 included in the air blower 1 according to Embodiment 1. FIG. FIG. 19 is a front view of UV irradiator 23 included in blower device 1 according to Embodiment 1. FIG. FIG. 20 is a rear view of the UV irradiator 23 included in the air blower 1 according to Embodiment 1. FIG. FIG. 21 is a cross-sectional view of the UV irradiator 23 included in the blower device 1 according to Embodiment 1, taken along line BB in FIG.

As shown in FIGS. 17 to 21, the UV irradiator 23 includes a light source 24, a case 25, a window 26, a substrate 27, a heat sink 28, a spacer 29, a seal member 30, and a fixture. 31 and wiring 32 . Note that the components of the UV irradiator 23 are not limited to these, and may be omitted, added, or replaced as appropriate.

The case 25 is a part that forms the appearance of the UV irradiator 23. Case 25 has an opening at a position where window 26 is attached. A light source 24 is installed on the substrate 27 . Power is supplied from the substrate 27 to the light source 24 so that the light source 24 emits light. Window 26 protects light source 24 . The window part 26 covers the light source 24 from the side opposite to the substrate 27 . The light generated by the light source 24 is transmitted through the window portion 26 and then radiated onto the air passing through the internal air duct 5 and the surface of the internal air duct 5 .

The heat sink 28 is for dissipating the heat of the light source 24 and the substrate 27 heated by light emission. The heat sink 28 in the illustrated example has fins to increase the surface area. Spacer 29 is for maintaining the distance between window 26 and light source 24 . A spacer 29 is arranged between the substrate 27 and the window 26 .

The sealing member 30 is, for example, a member that maintains airtightness and liquidtightness by sealing the gap between the case 25 and the window portion 26 . The fixture 31 is for fixing the position or positional relationship of a plurality of members. The fixture 31 is preferably detachable from the UV irradiator 23 or the internal air passage 5 . The fixture 31 may be for fixing the UV irradiator 23 to the air blower 1 or the internal air passage 5 . The fixture 31 may be for fixing at least one of the case 25 , the heat sink 28 and the substrate 27 to the blower device 1 or the internal air passage 5 . The fixture 31 may be for fixing the positions of the case 25, the substrate 27 and the heat sink 28 by fastening them. The fixture 31 may be for fixing the positions of the case 25 and the heat sink 28 by fastening them. The fixture 31 may be, for example, a screw as in the illustrated example. The wiring 32 is for connecting the substrate 27 to the power source.

The UV irradiator 23 may have a cooling section instead of or in addition to the heat sink 28 . A cooling unit is, for example, a blower such as a fan.

As shown in FIG. 21, the window part 26 is arranged with a gap with respect to the light source 24 . The gap may be, for example, a distance of approximately 0.1 mm to 50 mm. The window 26 protects the light source 24 .

The window part 26 in the illustrated example has a disk shape or a circular plate shape. As a modification, the window 26 may have, for example, a rectangular parallelepiped shape or a lens-like shape. The lens-like shape of the window 26 allows the light emitted by the light source 24 to be collected and a relatively small beam angle to be achieved.

The thickness of the window portion 26 is thin. However, it is preferable that the window portion 26 has a thickness that can withstand vibrations during operation of the blower 1 or shocks that may occur during cleaning or maintenance of the blower 1 . In general, as the thickness of the window portion 26 increases, its transmittance tends to decrease. Therefore, the thickness of the window portion 26 is, for example, about 0.5 mm to 3 mm. Preferably, the thickness of the window portion 26 is about 1 mm to 2 mm.

The window part 26 has an entrance surface, an exit surface, and a peripheral surface. The incident surface is the surface on which the light beam from the light source 24 is incident. The exit surface is the surface opposite to the entrance surface. The exit surface is a surface that emits light incident from the incident surface toward the facing surface of the internal air duct 5 or toward the air passing through the internal air duct 5 . The peripheral surface is a surface located laterally of the incident surface. The peripheral surface is a surface located laterally of the exit surface. The plane of incidence may be parallel to the plane of exit. The peripheral surface may be perpendicular to the entrance surface and the exit surface. The direction from the entrance surface to the exit surface is the thickness direction. The dimension of the window portion 26 in the thickness direction is preferably within the range described above (0.5 mm to 3 mm, or 1 mm to 2 mm), for example.

When the window portion 26 has a lens-like shape, the lens-like curved surfaces are the entrance surface and the exit surface. Moreover, when the window 26 has a lens-like shape, the window 26 has a central axis passing through the convex portion. A central axis of the window 26 or an imaginary extension of the central axis intersects the light source 24 . That is, the lens-shaped window portion 26 and the light source 24 are arranged on a straight line. The central axis of the window 26 or an imaginary extension of the central axis may pass through another window. That is, the lens-shaped window portion 26 and another window portion may be arranged on a straight line.

The light emitting surface of the light source 24 is desirably parallel to the incident surface of the window 26. If the light emitting surface of the light source 24 is not parallel to the incident surface of the window 26, the transmittance may decrease, and the illuminance of the internal air passage 5 to which the light from the output surface of the window 26 is emitted. may decline. If the light emitting surface of the light source 24 is parallel to the incident surface of the window portion 26, the decrease in transmittance can be reliably suppressed.

The light emitting surface of the light source 24 is provided at a position close to the incident surface of the window portion 26 . Since the light rays from the light source 24 travel radially, if the distance between the light source 24 and the incident surface of the window portion 26 increases, the number of light rays that do not enter the window portion 26 may increase. As a result, there is a possibility that the illuminance of the illuminated internal air passage 5 will decrease. In order for all the light rays from the light source 24 to enter the window 26, the larger the distance between the light source 24 and the window 26, the larger the size of the window 26 is required. If the distance between the light source 24 and the window portion 26 is short, all or most of the light beams from the light source 24 can enter the window portion 26 even if the size of the window portion 26 is small. can be raised.

The window part 26 is made of a material that transmits at least part of the wavelengths of the ultraviolet rays generated by the light source 24 . The window 26 is desirably made of a material having a high ultraviolet transmittance. Transmittance is the rate at which incident light of a specific wavelength passes through the window section 26 . Incident light that is not transmitted is either reflected or absorbed by the window 26 . The sum of transmittance, reflectance and absorptance is 100%. For example, the transmittance of the window 26 for UVA or UVB wavelengths is preferably 80% or more, more preferably 90% or more. For example, the transmittance of the window 26 for most of the UVA and UVB wavelengths is preferably 80% or more, more preferably 90% or more. Further, for example, among UVC, the transmittance of the window part 26 for wavelengths of 200 nm or more is preferably 80% or more, and more preferably 90% or more. In addition, the transmittance of the window 26 for most UVC wavelengths of 200 nm or more is preferably 80% or more, more preferably 90% or more. Further, the transmittance of the window portion 26 for wavelengths of 250 nm to 285 nm is preferably 80% or more, more preferably 90% or more. Further, the transmittance of the window portion 26 for most wavelengths of 250 nm to 285 nm is preferably 80% or more, more preferably 90% or more. Further, the transmittance of the window portion 26 for the dominant wavelength of the light source 24 is preferably 80% or more, more preferably 90% or more.

FIG. 22 is a cross-sectional view of the UV irradiator 23 included in the air blower 1 according to Embodiment 1. FIG. The blower device 1 or the UV irradiator 23 is provided with screws 33 . The screw 33 corresponds to a fixture for fixing the UV irradiator 23 to the wall 3 of the internal air passage 5 . The UV irradiator 23 is detachably fixed to the wall portion 3 of the internal air passage 5 by a detachable fixture such as a screw 33 . Note that the UV irradiator 23 may be fixed to the wall portion 3 of the internal air passage 5 by a fixture other than the screw 33 as long as the fixture is detachable. In the example shown in FIG. 22, the window portion 26 and the portion of the case 25 corresponding to the window frame of the window portion 26 extend from the opening 3j formed in the wall portion 3 of the internal air passage 5 to the internal air passage 5. A UV irradiator 23 is installed so as to expose the The wall portion 3 of the internal air duct 5 has bosses 3 k protruding from the back surface opposite to the surface facing the internal air duct 5 . The UV irradiator 23 is fixed to the internal air passage 5 by fastening the case 25 to the boss 3 k with the screw 33 .

A single UV irradiator 23 may have a plurality of windows 26 . The plurality of windows 26 may be arranged parallel to each other, or may be arranged substantially parallel to each other. FIG. 23 is a cross-sectional view showing a modification of the UV irradiator 23 included in the air blower 1 according to Embodiment 1. As shown in FIG. The UV irradiator 23 shown in FIG. 23 has a first window portion 26a and a second window portion 26b. The first window portion 26 a and the second window portion 26 b correspond to the plurality of window portions 26 . The first window portion 26 a covers the light source 24 . The second window portion 26b covers the first window portion 26a.

The light source 24, the first window portion 26a and the second window portion 26b are arranged on a straight line. Preferably, the second window portion 26b is arranged parallel to the first window portion 26a. Preferably, the incident surface of the first window portion 26 a is arranged parallel to the light emitting surface of the light source 24 . For example, the first window portion 26a and the second window portion 26b are arranged at positions that intersect the optical axis of the light source 24 or an imaginary extension line of the optical axis. At least one of the plurality of windows 26 included in one UV irradiator 23 may have a lens-like shape. The first window portion 26a is arranged at a position closer to the light source 24 than the second window portion 26b. The second window portion 26b is arranged at a position farther from the light source 24 than the first window portion 26a. The second window portion 26 b prevents water or foreign matter from entering the inside of the UV irradiator 23 and the inside of the main housing 2 by cooperating with the sealing member 30 . The second window portion 26b also has a function of preventing the light source 24 from being touched by a person's hand or the like. The first window portion 26a has a function of preventing the light source 24 from coming into contact with water, a foreign object, a human hand, or the like. Also, the first window portion 26 a has a function of protecting the light source 24 .

A configuration in which one UV irradiator 23 has only one window 26 is more preferable if the above-described sealing property is maintained. A portion of the light is reflected or absorbed by the window 26 . Therefore, the smaller the number of windows 26, the more efficiently the ultraviolet rays can be irradiated. In particular, if there is one window portion 26, the ultraviolet rays can be irradiated more efficiently.

The window part 26 may have a property of not transmitting short wavelength ultraviolet rays. Moreover, the window part 26 may have a property of not transmitting short wavelength ultraviolet rays by a filter or a band pass. The window part 26 may have a property of not transmitting wavelengths of 180 nm or less, for example. Further, the window portion 26 may have a property of not transmitting wavelengths of 150 nm or less. Short-wave ultraviolet rays can have adverse effects on the human body. Safety is further improved by using the window 26 that does not transmit short-wave ultraviolet rays.

The window part 26 is preferably made of a material with high UV transparency. The window 26 may be made of quartz glass, for example. The window 26 may be made of synthetic quartz glass, for example. The window part 26 may be made of, for example, UV cut glass that cuts part of UV. The window part 26 may be made of, for example, a highly UV-transmissive resin material. The window part 26 may be made of, for example, fluororesin. Examples of fluororesins include PFA, FEP, ETFE, and PCTFE.

An antireflection film may be formed on at least one of the entrance surface and the exit surface of the window 26 . An antireflection film prevents reflection of light incident on an incident surface from a light source, and is generally called an AR coat (antireflection coating). Since the antireflection film is a known technology, the explanation of its mechanism is omitted. Light that is not reflected is either transmitted or absorbed. For example, most of the light that is not reflected is transmitted and some is absorbed. For example, when the transmittance of quartz glass in the UVB region is 90%, if one side is treated with an antireflection film, the transmittance becomes 94%. It becomes about 98%. Therefore, by providing the window portion 26 with the antireflection film, it is possible to irradiate the ultraviolet rays more efficiently. The material used for the window 26 is not limited to quartz glass, and may be treated with an antireflection film. For example, fluororesin, which has higher transmittance than general materials but lower transmittance than quartz glass, may be treated with an antireflection film. Thereby, it is possible to increase the transmittance while suppressing the cost.

The window part 26 is made of, for example, a transparent material, a translucent material, or a highly transparent material. The window 26 is for example made of a material with a higher UV transmittance than most of the walls 3 of the internal air duct 5 . The window part 26 is made of, for example, a material having a higher UV transmittance than most of the wall part 3 of the internal air duct 5 facing the internal air duct 5 .

Also, the window 26 may be filtered to reduce the radiation intensity of a specific wavelength. A filter is, for example, a bandpass filter. For example, filtering may be applied to window 26 to reduce wavelengths harmful to the human body.

The window part 26 is arranged at a position close to the surface of the wall part 3 of the internal air duct 5 facing the internal air duct 5 . The window 26 may cooperate with the fixture 31 or the case 25 to improve airtightness with the internal air passage 5 . The window portion 26 may be arranged such that its thickness direction or central axis is parallel to the horizontal direction. Also, the window 26 may be arranged such that its thickness direction or central axis is not parallel to the horizontal direction. In this case, it is desirable that the window 26 be arranged in an inclined posture so that the upper side of the window 26 is located closer to the internal air duct 5 than the lower side of the window 26 . That is, it is desirable that the optical axis of the light source 24 is also inclined. In this case, the optical axis of the light source 24 is inclined downward from the horizontal. Therefore, it is possible to irradiate the ultraviolet rays to a slightly lower side of the internal air passage 5, thereby suppressing upward leakage of light rays.

The window part 26 may be fixed by being fitted into an opening provided in the wall part 3 of the internal air duct 5 . The surface of the wall portion 3 of the internal air passage 5 on which the window portion 26 is arranged and the window portion 26 may be arranged substantially on the same plane. That is, the window portion 26 may be arranged at a position recessed from the surface of the wall portion 3 around the window portion 26 or at a position recessed by one step. This makes it difficult for the hand to touch the window part 26 even when the hand is inserted into the internal air passage 5, and the window part 26 is easily prevented from being damaged.

The case 25 forms the appearance of the UV irradiator 23. A seal member 30 , a window 26 , a light source 24 , a spacer 29 and a substrate 27 are arranged between the case 25 and the heat sink 28 . The case 25 is arranged in contact with the wall portion 3 of the internal air passage 5 . The case 25 may be fixed so as to be in contact with the wall portion 3 of the internal air passage 5 via fixtures 31 . The case 25 may be fixed to the wall portion 3 of the internal air passage 5 without using the fixtures 31 . For example, the case 25 may be secured to the wall 3 of the internal air passage 5 using press fit or snap fit techniques. Alternatively, a male thread provided on the outer periphery of the case 25 is screwed into a female thread provided on the inner periphery of an opening formed in the wall portion 3 of the internal air passage 5, whereby the case 25 is secured to the internal airflow. It may be fixed to the wall 3 of the channel 5 .

The UV irradiator 23 does not necessarily have to include the case 25. Components of the UV irradiator 23 other than the case 25 may be fixed to the wall 3 of the internal air passage 5 . The case 25 is arranged at a position equivalent to the surface of the wall portion 3 of the internal air passage 5 or at a position recessed from the surface of the wall portion 3 of the internal air passage 5 . For example, the case 25 is located at a position equivalent to the wall portion 3 of the internal air passage 5, or at a distance from the wall portion 3 of the internal air passage 5, compared to the wall portion 3 of the internal air passage 5 around the case 25. placed slightly further away. As a result, there is little possibility of touching the case 25 when a person in the room puts his or her hand into the internal air duct 5, which is hygienic. Case 25 has an opening near its center. The opening is for passing light emitted from the light source 24 . Case 25 may have a groove for fixing seal member 30 . By fitting the seal member 30 into the groove, the seal member 30 is positioned in the circumferential direction.

The fixture 31 of the UV irradiator 23 is, for example, a screw. Fixtures 31 other than screws may be used. The fixture 31 is for fixing the UV irradiator 23 to the wall 3 of the internal air passage 5, for example.

In the present disclosure, a seal member may be provided to fill the gap between the wall portion 3 of the internal air passage 5 and the UV irradiator 23 . The sealing member and the aforementioned sealing member 30 are collectively referred to as "sealing member 30" hereinafter. The sealing member 30 is made of, for example, a softer material than the wall portion 3 of the internal air passage 5 . The sealing member 30 is made of, for example, a softer material than most of the walls 3 of the internal air passage 5 . The sealing member 30 may be a component generally called packing, O-ring, gasket, or the like. The seal member 30 is, for example, a soft material such as rubber, silicon, or elastomer. The sealing member 30 may be an integrated component insert-molded into the wall portion 3 of the internal air passage 5 . The UV irradiator 23 is fixed to the wall portion 3 of the internal air passage 5 via a fixture 31 or the like. A plurality of sealing members 30 may be provided. The sealing member 30 is, for example, interposed between the wall portion 3 of the internal air passage 5 and the case 25 to seal the wall portion 3 of the internal air passage 5 and the case 25 . The sealing member 30 is, for example, interposed between the wall portion 3 of the internal air passage 5 and the window portion 26 to seal the wall portion 3 and the window portion 26 of the internal air passage 5 . The sealing member 30 is, for example, interposed between the case 25 and the window 26 to seal the case 25 and the window 26 . The cross section of the sealing member 30 is slightly crushed when the UV irradiator 23 is fixed by the fixture 31 . For example, the cross-sectional area of seal member 30 may be reduced by compression, eg, by 10%-20%. Such deformation of the seal member 30 enhances the sealing performance. Without the seal member 30, water may enter the inside of the main body housing 2 or the inside of the UV irradiator 23 through a slight gap between the wall 3 of the internal air passage 5 and the UV irradiator 23. There is Without the sealing member 30 , water may enter the inside of the main housing 2 or the inside of the UV irradiator 23 through a slight gap between the case 25 and the window 26 . If water adheres to the UV irradiator 23, it may malfunction. By using the sealing member 30 described above, it is possible to suppress the entry of water.

The heat sink 28 dissipates the heat of the substrate 27 and the light source 24 to cool them and suppress their temperature rise. The heat sink 28 is attached to the surface of the substrate 27 opposite to the light source 24 or in the vicinity of the surface. The heat sink 28 is fixed so as to contact the substrate 27 directly or indirectly. At least part of the substrate 27 or at least part of the heat sink 28 may be positioned to be exposed to the internal air passage 5 . As a result, the substrate 27 or the heat sink 28 can be cooled by the airflow during operation of the blower 1 . As a result, in addition to heat dissipation from the heat sink 28 by natural convection during normal operation, the heat dissipation efficiency can be further enhanced by forced convection during operation of the blower 1 . Also, the substrate 27 or the heat sink 28 may be cooled by operating the electric blower 10 in a gentle breeze. As a means for adjusting the air volume, it is desirable that the motor of the electric blower 10 is a brushless motor because the air volume can be easily controlled.

The substrate 27 is for causing the light source 24 to emit light. Substrate 27 is electrically connected to light source 24 . The board 27 is electrically connected to the power supply. The substrate 27 may have a plate-like shape. For example, the optical axis of light source 24 is arranged perpendicular to substrate 27 . Various other electronic components or electric components may be connected to the substrate 27 . The substrate 27 may have hardness to the extent that it does not deform when an external force is applied, for example, when a force is applied by one hand. Alternatively, the substrate 27 may have such rigidity that it deforms when force is applied with one hand. Further, the substrate 27 may have such rigidity that it bends due to its own weight. For example, if a portion of the substrate 27 has a thickness of 1 mm or less, the rigidity of that portion will be low. For example, if a portion of the substrate 27 has a thickness of 0.1 mm or less, the rigidity of that portion will be further reduced. Further, if the substrate 27 has a shape with notches, the rigidity is lowered. A portion of the substrate 27 may have a thin film-like portion. With such a configuration, the substrate 27 can be easily deformed and the bent state can be maintained.

For example, when two light sources 24 are arranged on one flat substrate 27, the optical axes of the light sources 24 are arranged in parallel. However, in order to irradiate the wide range of the internal air passage 5 with ultraviolet rays, it is more efficient to irradiate the two light sources 24 so that the optical axes thereof are non-parallel to each other. In this case, by mounting one light source 24 on one substrate 27 and arranging the two substrates 27 at different angles, the optical axes of the two light sources 24 are arranged in a non-parallel state. For example, when the rigidity of the substrate 27 is low as described above, the substrate 27 can be used as a part of the UV irradiator 23 while being bent. Thereby, after arranging a plurality of light sources 24 on one substrate 27, the optical axes of the plurality of light sources 24 can be arranged in different directions. As a result, the number of substrates 27 can be reduced, leading to space saving.

The spacer 29 has the function of keeping the distance between the substrate 27 and the window 26 constant. The spacer 29 is made of resin material or metal material, for example. The shape of the spacer 29 may be a hollow cylindrical shape or a hollow rectangular tube shape. Spacer 29 may have the same contour as window 26 . For example, if the outer shape of the window portion 26 is circular, the shape of the spacer 29 may be a hollow cylindrical shape. Moreover, if the outer shape of the window portion 26 is a rectangular parallelepiped shape, the shape of the spacer 29 may be a hollow prismatic shape. The substrate 27 is in contact with one end side of the spacer 29 . The window portion 26 is in contact with the other end side of the spacer 29 .

The spacer 29 has a thickness direction, a width direction and a length direction. When the spacer 29 has a hollow cylindrical shape, the length of the spacer 29 in the width direction is equal to the length of the spacer 29 in the length direction. The length of the spacer 29 in the thickness direction is shorter than the length of the spacer 29 in the width direction and shorter than the length of the spacer 29 in the length direction. For example, the dimension of the spacer 29 in the thickness direction corresponds to the dimension of the shortest direction among the three axes of the x-direction, the y-direction, and the z-direction which are orthogonal to each other. The spacer 29 has surfaces facing each other in the thickness direction. The length of the spacer 29 in the thickness direction is longer than the length of the light source 24 in the thickness direction. The spacer 29 has an axis along the thickness direction. The axis of spacer 29 is preferably parallel to the optical axis of light source 24 . The axis of spacer 29 may be the central axis. Further, the light source 24 and the spacer 29 are arranged so that the virtual extension line of the optical axis of the light source 24 and the virtual extension line of the thickness direction axis of the spacer 29 pass through the opposing wall portions 3 of the internal air passage 5. preferably. The spacer 29 may have a hollow shape, and the light source 24 may be arranged inside the spacer 29 , that is, in the hollow portion of the spacer 29 . It is preferable that the light source 24 and the spacer 29 are arranged such that the thickness direction of the spacer 29 matches or substantially matches the thickness direction of the light source 24 . One side surface of the spacer 29 in the thickness direction corresponds to a surface close to the wall portion 3 of the internal air passage 5, and a surface opposite to the one side surface is a surface far from the wall portion 3 of the internal air passage 5. Equivalent to. Spacer 29 and light source 24 are in contact with substrate 27 . A surface of the spacer 29 far from the wall 3 of the internal air duct 5 in the thickness direction and a surface of the light source 24 far from the wall 3 in the thickness direction are in contact with the substrate 27 . In other words, the surface of the spacer 29 farther from the wall 3 of the internal air duct 5 in the thickness direction and the surface farther from the wall 3 of the internal air duct 5 in the thickness direction of the light source 24 are arranged on the same plane, They are arranged on almost the same plane. This is combined with the fact that the length of the spacer 29 in the thickness direction is longer than the length of the light source 24 in the thickness direction. , closer to the wall portion 3 of the internal air passage 5 than the surface closer to the wall portion 3 of the internal air passage 5 in the thickness direction of the light source 24 . Accordingly, the light beam emitted from the light source 24 hits the spacer 29 and is reflected on the front side of the surface of the internal air passage 5 near the wall portion 3 in the thickness direction of the light source 24 .

A light source 24 is mounted on the surface of the substrate 27 . The light source 24 is arranged so as to be surrounded by the substrate 27 , the window 26 and the spacer 29 . By doing so, it is possible to more reliably prevent damage to the light source 24 due to impact from the outside of the light source 24 . The spacer 29 may be made of a material with high UV reflectance. The spacer 29 may be configured to reflect at least the dominant wavelength of the light generated by the light source 24 . For example, when the reflectance of the spacer 29 is low, such as when the spacer 29 has a high absorptivity, part of the light beam is absorbed by the spacer 29, and the light beam reaching the wall portion 3 of the internal air passage 5 is reduced. illuminance is reduced. Further, for example, when the reflectance of the spacer 29 is low, such as when the spacer 29 has a high transmittance, the light beam emitted from the light source 24 in a wide range is applied to the wall 3 of the internal air passage 5. In addition, a window portion 26 having a large size is required. If the window portion 26 is large, its thickness must be increased in order to ensure its strength. As the thickness of the window portion 26 increases, the transmittance decreases. By using the spacer 29 that has a high reflectance with respect to the wavelength of the ultraviolet rays generated by the light source 24 used, it is possible to reflect light rays irradiated at a wide angle, suppress the size and thickness of the window 26, and reduce the illuminance. can be suppressed. Materials with high reflectance include, for example, fluororesins as resins, and aluminum, members subjected to surface treatment such as alumite processing and vapor deposition as metals. High reflectance means, for example, that the reflectance for the dominant wavelength of the light source 24 is 80% or more, preferably 90% or more. Alternatively, high reflectivity may be relatively high reflectivity when compared to other materials used for the walls 3 of the internal air passage 5 .

It should be noted that the spacer 29 does not have to be hollow. Although it is desirable that the light source 24 is surrounded by the spacer 29 360 degrees or all around, it is not limited to such a configuration. For example, light source 24 may be surrounded by multiple spacers 29 . For example, the light source 24 may be surrounded by a plurality of spaced apart spacers 29 . For example, the light source 24 may be surrounded by the spacers 29 over a range of 180 degrees or more around the center of the light source 24 and the optical axis, or the light source 24 may be surrounded by the spacers 29 over a range of 270 degrees or more. may The shape of the spacer 29 may not be circular or rectangular, but may be a columnar shape with a part missing, such as a C-shape, a U-shape, or an arch shape. However, the shape of the spacer 29 is preferably a hollow circle or a hollow square with four sides closed. This is because the spacer 29 cooperates with the window portion 26 or the seal member 30 to provide a structure that makes it difficult for water or dust to enter the light source 24 . For the same reason, when the spacer 29 has a shape in which a part is missing, it is preferable to have a shape in which the missing range is as small as possible. Moreover, it is preferable that the missing portion of the spacer 29 be positioned on the lower side in the vertical direction. For example, the missing part of the spacer 29 may be within a range below the center of the light source 24 in the vertical direction. For example, the spacer 29 may be missing in a range below the lower end of the light source 24 with respect to the vertical position. For example, the shape of the spacer 29 may be a hollow prismatic C-shaped or U-shaped shape with a missing base or lower portion. Part of the light beam emitted from the light source 24 disposed inside the spacer 29 having a hollow cylindrical shape or a hollow prismatic shape, that is, in the hollow portion, strikes the spacer 29 and is reflected. A light ray that hits the spacer 29 only once and is reflected advances toward the wall portion 3 side of the internal air passage 5 . At this time, of the spacers 29, the light rays that strike the vertically lower part of the spacers 29 only once, are reflected, and then proceed to the wall portion 3 side of the internal air passage 5 without hitting the spacers 29, are vertically upward. move on. Such light beams do not hit the wall portion 3 of the internal air passage 5, but irradiate the space in which the blower device 1 is installed. On the other hand, if the spacer 29 lacks the lower portion in the vertical direction, it is possible to reduce the amount of light that strikes the spacer 29 and is reflected to irradiate the space in which the blower device 1 is installed. As a result, the risk of radiation exposure to people in the vicinity can be reduced.

The fixing of the UV irradiator 23 is not limited to the fixture 31. For example, the fixture 31 may be part of the blower device 1 or part of the wall 3 of the internal air passage 5 . The fixture 31 may be part of the case 25 or part of the heat sink 28 . Further, if the UV irradiator 23 can be fixed, the fixture 31 may not be provided.

24 to 27 are cross-sectional views showing other modifications of the UV irradiator 23 included in the air blower 1 according to Embodiment 1. FIG. 24 to 27 each show a modification of the UV irradiator 23 that does not have the case 25. FIG. 24 to 27, the screws 33 fasten the heat sink 28 to the boss 3k of the wall 3 of the internal air passage 5 so that the UV irradiator 23 is attached to the wall 3 of the internal air passage 5. is fixed.

In the modified example shown in FIG. 24 and the modified example shown in FIG. 25, the seal member 30 seals the gap between the window portion 26 and the wall portion 3 of the internal air passage 5 .

The modified examples shown in FIGS. 25 to 27 are examples without spacers 29 . In these modifications, the window portion 26 is held by the wall portion 3 of the internal air duct 5 .

In the modification shown in FIG. 25, the window portion 26 is supported by a protruding portion 3m protruding from the boss 3k to the inner peripheral side.

The modified examples shown in FIGS. 26 and 27 are examples without the sealing member 30 .

In the modification shown in FIG. 26, the window part 26 is attached to the wall part 3 of the internal air duct 5 using bushes 34 . The outer peripheral portion of the bush 34 fits into the inner peripheral portion of the opening formed in the wall portion 3 of the internal air passage 5 . The outer peripheral portion of the window portion 26 fits into the inner peripheral portion of the bush 34 . The bushing 34 has, for example, a structure similar to a cable bushing. The bush 34 may also have the function of sealing the gap between the window portion 26 and the wall portion 3 of the internal air passage 5 . In this case, the window part 26 is attached by pushing the window part 26 from the wall part 3 side of the internal air passage 5 toward the light source 24 .

The air blower 1 may be configured such that the UV irradiator 23 is removable. In other words, the UV irradiator 23 may be configured to be removable from the wall 3 of the internal air passage 5 . In addition, the main body portion of the blower device 1 excluding the UV irradiator 23 can be separated from the UV irradiator 23, and the blower device 1 is configured so that the UV irradiator 23 can be removed from the main body portion. may be configured. The blower device 1 may be configured such that the UV irradiator 23 can be removed and replaced with a new UV irradiator 23 . By doing so, when the light source 24 reaches the end of its life and its performance deteriorates, the performance can be restored by replacing it with a new UV irradiator 23 . Also, by replacing with a new UV irradiator 23, the performance of the window part 26 or the sealing member 30 can be restored. Further, by removing the fixture 31, the light source 24 or the window portion 26 can be replaced while the case 25 or the sealing member 30 is still attached to the blower device 1. FIG. That is, it is possible to easily replace the entire UV irradiator 23 or selectively replace a part of the UV irradiator 23 according to the part to be removed or as required. Further, the light source section including the light source 24 can be removed by removing the screw 33 as a fixture or the fixture 31 . That is, the light source unit can be removed by multiple methods or by removing multiple parts. As already mentioned, it is preferable that the upper portion of the light source 24 or the window portion 26 be positioned closer to the wall portion 3 of the internal air passage 5 than the lower portion of the light source 24 or the window portion 26 . That is, the upper portion of the UV irradiator 23 as a whole may be located closer to the wall portion 3 of the internal air passage 5 than the lower portion. In this case, when the fixture 31 is removed and the light source 24 or the window portion 26 is replaced, the sealing member 30 is less likely to fall off, thus facilitating attachment/detachment and replacement work.

In the modified example shown in FIG. 27, the window part 26 is attached to the wall part 3 of the internal air passage 5 using double-sided adhesive tape 35 . A peripheral edge portion of the window portion 26 is adhered to the edge portion of the opening formed in the wall portion 3 of the internal air passage 5 with a double-sided adhesive tape 35 . A double-faced adhesive tape 35 seals the gap between the window portion 26 and the wall portion 3 of the internal air passage 5 .

The window part 26 or the UV irradiator 23 can be removed by removing the screw 33 or the fixing tool 31 as a fixing tool. Thus, the blower device 1 may be configured such that the window portion 26 is removable. The blower 1 may be configured such that the window 26 can be removed and replaced with a new window 26 . By doing so, when the window part 26 deteriorates and the transmittance decreases, the transmittance can be recovered by replacing it with a new window part 26 . If the window 26 is separate from the UV irradiator 23 , the window 26 may be removed without removing the UV irradiator 23 . Moreover, when the window portion 26 is integrated with the UV irradiator 23, the window portion 26 may be replaced with a new one by replacing the entire UV irradiator 23 with a new one.

The blower device 1 may further comprise a controller 22 configured to reduce the average output of the UV irradiator 23 or set the average output of the UV irradiator 23 to zero in response to detection by the hand detector 21. good. Ultraviolet rays can be harmful when they hit the human body. If the controller 22 reduces the average output of the UV irradiator 23 or sets the average output of the UV irradiator 23 to zero in response to the detection of the hand by the hand detector 21, the human body is exposed to ultraviolet rays. You can more reliably prevent it from hitting you. Controller 22 can adjust the average output of UV irradiator 23 by adjusting the current of light source 24 .

Here, the hand detector 21 can detect the presence or absence of a hand inserted into the internal air duct 5 or a hand placed on the wall 3 of the internal air duct 5 . The controller 22 of the air blower 1 may be configured so that the UV irradiator 23 irradiates ultraviolet rays when the hand detector 21 detects that there is no hand. The UV irradiator 23 irradiates ultraviolet rays when the wall 3 of the internal air passage 5 is free of hands, so that both safety and sanitation can be achieved more reliably.

As described above, the blower device 1 may further include the human detector 39. A human detector 39 detects a human body approaching the blower 1 . The human detector 39 may have, for example, a human sensor installed in the main housing 2 . It should be noted that the blower device according to the present disclosure may not include a human detector. For example, the human detector 39 detects a human body located closer than a predetermined distance to the air blower 1 . For example, the human detector 39 detects movement of a human body located closer than a predetermined distance to the blower 1 . For example, the human detector 39 detects a person standing in a predetermined area with respect to the blower 1 . For example, the human detector 39 detects the posture of a human body.

The blower device 1 may further comprise a controller 22 configured to reduce the average output of the UV irradiator 23 or set the average output of the UV irradiator 23 to zero in response to detection by the occupant detector 39. good. If the controller 22 reduces the average output of the UV irradiator 23 or sets the average output of the UV irradiator 23 to zero in response to the detection of a person by the human detector 39, the human body is exposed to ultraviolet rays. You can more reliably prevent it from hitting you.

The amount of UV irradiation is proportional to the product of the illuminance and the irradiation time. Assuming that the illuminance is constant, it is possible to calculate the irradiation time corresponding to the amount of ultraviolet irradiation necessary for sufficiently sterilizing the indoor space or the inside of the internal air duct 5 .

The controller 22 reduces the average output of the UV irradiator 23 when the time for which the hand detector 21 continues to fail to detect a hand or the time for which the human detector 39 continues to fail to detect a person exceeds the reference. It may be configured to reduce or zero the average power of the UV illuminator 23 . This is advantageous in preventing deterioration of the constituent material of the wall portion 3 of the internal air passage 5 .

The controller 22 is configured to reduce the average output of the UV irradiator 23 or set the average output of the UV irradiator 23 to zero when the duration of UV irradiation by the UV irradiator 23 exceeds a reference. may be This can prevent one irradiation time from becoming longer than necessary. Therefore, it is advantageous in extending the life of the light source 24, preventing a decrease in the transmittance of the window portion 26, and preventing deterioration of the constituent material of the wall portion 3 of the internal air passage 5.

The controller 22 is configured to reduce the average output of the UV irradiator 23 or set the average output of the UV irradiator 23 to zero when the duration of UV irradiation by the UV irradiator 23 exceeds a reference. may be This can prevent one irradiation time from becoming longer than necessary. Therefore, it is advantageous in extending the life of the light source 24 , preventing a decrease in the transmittance of the window 26 , and preventing deterioration of the constituent material of the wall 3 .

Further, when the temperature of the UV irradiator 23 or the temperature of the substrate 27 or chip of the UV irradiator 23 exceeds the first reference, the controller 22 reduces the average output of the UV irradiator 23 or may be configured to zero the average output of The first reference is, for example, 50°C to 200°C, more preferably 80°C to 140°C. The reference is, for example, the temperature of the UV irradiator 23 or the temperature of the substrate 27 or chip of the UV irradiator 23 as the reference junction temperature. The controller 22 may also increase the average power of the UV illuminator 23 again when the temperature of the UV illuminator 23 or the temperature of the substrate 27 or chip of the UV illuminator 23 exceeds the second criterion. The average output of the UV irradiator 23 in this case is the output before the output is reduced, or a value lower than the output before the average output of the UV irradiator 23 is reduced. The second reference may be the same temperature as the first reference temperature. More preferably, the second reference is a temperature lower than the temperature of the first reference. Moreover, the blower device 1 may be provided with a junction temperature detector. The junction temperature detector may derive the junction temperature by calculation or directly detect the junction temperature. The junction temperature detectors may include, for example, a thermal resistance detector that detects thermal resistance, an ambient temperature detector that detects ambient temperature, and a case temperature detector that detects case temperature. As a method of calculating the junction temperature, for example, the following formula (1) or formula (2) may be used. By these things, failure and deterioration of the UV irradiator 23 can be suppressed.

Tj=Ta+Rth(ja)×P (1)
Tj: junction temperature Ta: ambient temperature Rth(ja): thermal resistance between junction and atmosphere P: power consumption

Tj=Tc+Rth(j−c)×P (2)
Tj: Junction temperature Tc: Case temperature Rth(j-c): Thermal resistance between junction and case P: Power consumption

28 is a cross-sectional side view showing an example of attaching the UV irradiator 23 to the wall portion 3 of the internal air passage 5. FIG. In the example of FIG. 28 , the internal air passage 5 has a bypass air passage 41 . The bypass air passage 41 is formed by a cover 42 that covers the UV irradiator 23 from the heat sink 28 side. A part of the airflow AF flowing through the internal airflow passage 5 is divided as a bypass airflow BAF and flows into the bypass airflow passage 41 from the inlet 43 . The bypass airflow BAF that has passed through the bypass airflow path 41 joins the original airflow AF after exiting the outlet 44 . By the bypass airflow BAF passing through the bypass airflow path 41, the heat sink 28 in particular of the UV irradiator 23 can be efficiently cooled.

In the example of FIG. 28, a wall section 45 is provided facing the wall section 3 to which the UV irradiator 23 is attached. An airflow AF flows between the wall portion 3 and the wall portion 45 . The window portion 26 faces the wall portion 45 . Airflow AF flows between the window portion 26 and the wall portion 45 . The wall portion 45 may be omitted.

29 is a cross-sectional side view showing another example of attaching the UV irradiator 23 to the wall portion 3 of the internal air passage 5. FIG. Regarding the example of FIG. 29, differences from FIG. 28 will be described. In the example of FIG. 29, the cover 42 is removably attached using fasteners 46 . Fixtures 46 may be, for example, screws. Removing the fixture 46 allows the cover 42 to be removed. By removing the cover 42, the UV irradiator 23 can be easily removed.

1 blower, 2 main body, 3 wall, 3j opening, 3k boss, 3m protrusion, 4 upper heat exchanger, 5 internal air passage, 6 air intake, 7 outlet, 8 upper heat exchanger, 9 lower Heat exchanger, 10 Electric blower, 11 Contamination level detection estimator, 12 Body temperature detector, 13 Person identifier, 14 Temperature detector, 14A First temperature detector, 14B Second temperature detector, 15 Wind direction changer, 16 Mover, 17 Panel, 18 Louver, 21 Hand detector, 22 Controller, 23 UV irradiator, 23A First UV irradiator, 23B Second UV irradiator, 24 Light source, 25 Case, 26 Window, 26a First window Part 26b Second window part 27 Substrate 28 Heat sink 29 Spacer 30 Sealing member 31 Fixing tool 32 Wiring 33 Screw 34 Bushing 35 Double-sided adhesive tape 39 Human detector 41 Bypass airway 42 cover, 43 inlet, 44 outlet, 45 wall, 46 fixture, 101 processor, 102 memory

Claims

an intake port communicating with the indoor space;
an air outlet communicating with the indoor space;
an internal air passage from the inlet to the outlet;
an electric blower that generates an airflow from the intake port to the blowout port through the internal air passage;
a UV irradiator that irradiates at least part of the internal air passage with ultraviolet rays;
A blower with.
The UV irradiator comprises a heat sink and a substrate,
at least part of the heat sink or at least part of the substrate is exposed to the internal air passage;
2. The blower device according to claim 1, further comprising a controller that changes the average output of said UV irradiator according to the air volume of said electric blower.
a human detector that detects a presence state in which a person is present in the indoor space and an absence state in which no person is present in the indoor space;
a controller that changes the average output of the UV irradiator according to the detection result of the human detector;
The blower device of claim 1, further comprising:
The blower device according to claim 3, wherein the controller is configured to increase the average output of the UV irradiator when changing from the present state to the absent state.
a contamination level detection and estimator for detecting or estimating the contamination level of the indoor space;
a controller that changes the average output of the UV irradiator according to the degree of contamination;
The blower device of claim 1, further comprising:
a body temperature detector that detects the body temperature of a person in the indoor space;
a controller that changes the average output of the UV irradiator according to the body temperature;
The blower device of claim 1, further comprising:
a person identifier that identifies a person in the indoor space;
a body temperature detector that detects the body temperature of a person in the indoor space;
a controller that increases the average output of the UV irradiator when the current body temperature of the person identified by the person identifier is higher than the person's normal temperature;
The blower device of claim 1, further comprising:
At least part of the UV irradiator is exposed to the internal air passage,
a temperature detector for detecting the temperature of the UV irradiator;
an air direction changer that changes the direction of airflow in the internal air passage;
a controller that changes the direction of the airflow in the internal air passage with the wind direction changer according to the temperature of the UV irradiator;
The blower device of claim 1, further comprising:
a mover for moving the UV irradiator between a first position and a second position;
a temperature detector for detecting the temperature of the UV irradiator;
a controller for moving the UV irradiator by the mover according to the temperature of the UV irradiator;
further comprising
2. The blower device according to claim 1, wherein the heat dissipation efficiency of the UV irradiator at the first position is different from the heat dissipation efficiency of the UV irradiator at the second position.
The blower device according to any one of claims 1 to 8, which is used as an indoor unit of an air conditioner,
a heat exchanger arranged in the internal air passage;
a mover for moving the UV irradiator between a first position in the air path from the inlet to the heat exchanger and a second position in the air path from the heat exchanger to the outlet; and,
a controller that moves the UV irradiator to the first position during heating operation and moves the UV irradiator to the second position during cooling operation;
A blower device further comprising:
The blower device according to any one of claims 1 to 8, which is used as an indoor unit of an air conditioner,
The UV irradiator is a first UV irradiator,
a second UV irradiator that irradiates ultraviolet rays to at least part of the internal air passage;
a heat exchanger arranged in the internal air passage;
a controller;
further comprising
The first UV irradiator is arranged in an air passage from the air inlet to the heat exchanger,
The second UV irradiator is arranged in an air passage from the heat exchanger to the outlet,
The controller turns on the first UV irradiator and turns off the second UV irradiator during heating operation, and turns off the first UV irradiator and turns off the second UV irradiator during cooling operation. A blower configured to illuminate a
The UV irradiator is a first UV irradiator,
a second UV irradiator that irradiates ultraviolet rays to at least part of the internal air passage;
a heat source arranged in the internal air passage;
a controller;
further comprising
The first UV irradiator is arranged in an air passage from the air inlet to the heat source,
The second UV irradiator is arranged in an air passage from the heat source to the outlet,
The controller is configured to make the average output of the second UV irradiator lower than the average output of the first UV irradiator or turn off the second UV irradiator during hot air operation. 2. The blower device according to claim 1.
The UV irradiator is a first UV irradiator,
a second UV irradiator that irradiates ultraviolet rays to at least part of the internal air passage;
a heat source arranged in the internal air passage;
a controller;
a first temperature detector that detects the temperature of the first UV irradiator;
a second temperature detector that detects the temperature of the second UV irradiator;
further comprising
The first UV irradiator is arranged in an air passage from the air inlet to the heat source,
The second UV irradiator is arranged in an air passage from the heat source to the outlet,
The controller is configured to vary the average output of the second UV illuminator in response to the temperature of the second UV illuminator sensed by the second temperature sensor, or to change the average output of the second UV irradiator according to the temperature of the second UV irradiator detected by the device and the temperature of the first UV irradiator detected by the first temperature detector. The blower device according to claim 1.