JP2018162898A - Air conditioning device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air conditioning device that can supply conditioned air (air that is conditioned) that is efficiently sterilized without using water cluster that has high-oxidation force and is in an active state, in a package type air conditioning device.SOLUTION: In an air conditioning device constituting a heat pump type refrigeration cycle with an outdoor unit and an indoor unit, an air sterilization unit not having blower function is fixed in the vicinity of an air intake port of the indoor unit that can sterilize air circulating therethrough with an ultraviolet ray. The air conditioning device uses suction force of an indoor fan of the indoor unit to introduce the air sterilized with an ultraviolet ray by the air sterilization unit into the indoor unit, and conditions air.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an air conditioner.

  A so-called package type air conditioner (sometimes referred to as a package type air conditioner) in which an indoor unit and an outdoor unit serving as a heat source unit are connected by a refrigerant pipe is widely used. In such a package-type air conditioner, atmospheric air is introduced into the indoor unit from the inlet of the indoor unit via a filter, and the introduced atmospheric air and the surface of the heat exchanger (in which the refrigerant flows inside) ( (Normally, a large number of fins are formed in contact with each other), and heat exchange is performed to adjust the temperature and humidity of the ambient air, and conditioned air is blown out from the air outlet (Patent Document) 1). In addition, during dehumidification and cooling operation, condensed water condensed from water vapor contained in the ambient air adheres to the surface of the indoor heat exchanger, so this condensed water is dropped down along the surface of the indoor heat exchanger. This is received by a drain pan installed below the indoor heat exchanger, and discharged to the outside through a drain pipe connected to the drain pan.

  By the way, in such an air conditioner, removal of odorous components adhering to indoor walls, curtains, etc., inactivation of allergens, viruses, etc. floating or adhering in the room and sterilization of mold, bacteria, etc. Some have a function of performing (see Patent Document 2).

  That is, Patent Document 2 states that “having a heat exchanger, a blower, a blower circuit that leads from the suction port to the heat exchanger, the blower and the blower outlet, and a Peltier element, discharge on the cooling surface side thereof. A water cluster generator that has heat radiation fins on the electrode and heat radiation surface side, and discharges water generated on the cooling surface side into the air as fine water particles containing radicals and ions with high oxidizing power by discharge of the discharge electrode And an air conditioner having an opening for passing indoor air through the heat dissipating fins and discharging fine water particles from the water cluster generator from the outlet. And according to the air conditioner described in this patent document 2, since the water cluster discharged | emitted in the air is high in safety and has high oxidizing power, allergen floating or adhering in the room, It is said that a high effect can be obtained against inactivation of viruses and the like and sterilization of fungi and bacteria.

  Further, as an air cleaner that does not have an air conditioning function such as cooling, heating, and dehumidification, an air purifier having a sterilizing function using a sterilizing wire is known (see Patent Document 3). That is, in Patent Document 3, “a plurality of ultraviolet light-emitting diodes that emit deep ultraviolet light having a wavelength of 200 to 350 nm is formed inside a casing made of a box having an air inlet opening and an air outlet opening. An air sterilization unit that forms a sterilization chamber by detachably fixing the substrate mounted on the array, and a blower, and irradiates the air flowing through the sterilization chamber with deep ultraviolet rays emitted from the ultraviolet light emitting diodes The ultraviolet light emitting diode is packaged or modularized and mounted on the substrate in a structure that emits parallel light, and is mounted on the inner wall surface of the sterilization chamber. A reflecting plate made of a plate-shaped body, at least a part of which is made of an ultraviolet reflecting material or at least a part of the surface of which is made of an ultraviolet reflecting material, is fixed in the sterilization chamber. The deep ultraviolet light emitted from the ultraviolet light-emitting diode passes through the air present in the sterilization chamber and is then reflected by the inner wall surface formed of the ultraviolet reflecting material or the surface of the reflector, An “air purifying device characterized in that air is further passed once or more” is described. According to the air cleaning device described in Patent Document 3, air can be sterilized efficiently, and there is no need to use a large number of ultraviolet light emitting elements side by side, so that the device can be made compact. It is supposed to be possible.

Japanese Patent No. 5516695 JP 2008-275311 A Japanese Patent No. 5812970

  As described above, according to the air conditioner described in Patent Document 2, the water clusters released into the air can safely sterilize microorganisms floating or adhering in the room. ing.

  However, based on the sterilization principle, it is premised on the contact between the active water cluster and the microorganisms to be sterilized, and the sterilizing effect in the entire room as the air conditioning target space must be limited. . This is because the discharged water cluster reacts indiscriminately with various indoor objects such as ceilings, walls, and furniture as well as indoor atmosphere air, dust and dust floating in the room, as well as those to be sterilized. This is because the ratio of water clusters used for sterilization of microorganisms is reduced because the microorganisms are deactivated. In addition, it is not always clear what the active species of the water cluster is, but it is known that the lifetime of hydroxyl radical, which is an active species with strong oxidizing power, is extremely short. By analogy with the above, it may be inactivated before contact with microorganisms to be sterilized. Furthermore, when indoor interiors and furniture such as curtains come into contact with active water clusters, there is a concern that the surface color tone of these interiors and furniture may change (fading) due to its strong oxidizing action. The

  Moreover, according to the air purifying apparatus described in Patent Document 3, indoor air can be sterilized, but air conditioning such as cooling, heating, and dehumidification cannot be performed. Furthermore, when taking advantage of the feature that the device can be made compact, the volume of the sterilization chamber cannot be made very large, and in order to sterilize the entire atmosphere in the room, the operation is continued continuously for a long time. There is a need to do.

  Therefore, the present invention can efficiently sterilize conditioned air (harmonized) without causing the above-described problems (in other words, without using an active water cluster having high oxidizing power). It is an object of the present invention to provide an air conditioner that can supply (air).

  The present inventor has intensively studied to solve the above problems. As a result, it has been found that there are various merits when a sterilization unit capable of ultraviolet sterilization of air is arranged on the upstream side of the suction port of the indoor unit so that the air sterilized with ultraviolet rays can be sucked therefrom. That is, in this case, since the suction force by the indoor fan of the indoor unit can be used, the sterilization unit does not need to be provided with a blowing means such as a fan. Further, since there is no air blowing means, the proportion of the sterilization space (ultraviolet irradiation region) in the sterilization unit can be increased, and the weight of the apparatus can be reduced. It becomes possible to install a sterilization unit in a place with a sufficient installation area. Furthermore, as a result of these, the ultraviolet irradiation area can be widened to increase the amount of sterilization treatment per unit time, and sterilized conditioned air can be efficiently obtained.

The air conditioner of the present invention has been made based on such knowledge, an outdoor unit having an outdoor fan, a compressor, an outdoor heat exchanger, and an expansion valve,
An indoor unit having a first casing having an air inlet and an air outlet and having a first air passage formed therein, and an indoor fan and an indoor heat exchanger respectively disposed in the first air passage And having
In the air conditioner in which the compressor of the outdoor unit, the outdoor heat exchanger and the expansion valve, and the indoor heat exchanger of the indoor unit are connected via a refrigerant pipe to constitute a heat pump refrigeration cycle,
An ultraviolet ray provided in the second air passage having an air inlet and an air outlet, a second casing having a second air passage formed therein, and an ultraviolet ray emitting portion for emitting ultraviolet rays. Further comprising an air sterilization unit that sterilizes the air by irradiating the ultraviolet light emitted from the ultraviolet light emitting unit to the air present in the irradiation region;
The air sterilization unit does not have a blowing means,
The air in the second air passage is moved by the suction force of the indoor fan of the indoor unit, discharged from the air discharge port of the air sterilization unit, and the discharged air is sucked from the intake port of the indoor unit It was made to do.

  In the air conditioning apparatus of the present invention, the air discharged from the air discharge port of the air sterilization unit and the indoor atmosphere air that does not pass through the air sterilization unit are simultaneously sucked from the intake port of the indoor unit. It is preferable to do.

By carrying out like this, in the air conditioner which can change a ventilation volume largely, for example with about 7-20 (m < ³ > / min) according to ventilation intensity modes, such as slight, weak, and strong, ventilation intensity is strong ( Even when the amount of air flow is increased), the speed of the air passing through the sterilization unit can be adjusted to a speed at which sufficient ultraviolet sterilization can be performed.

Further, in the air conditioner of the present invention, the air is exhausted from the air exhaust port of the air sterilization unit that occupies the entire suction speed V _T (m ³ / min) of the air sucked from the air inlet of the indoor unit. It is preferable to have suction ratio control means for controlling the suction ratio (V ₁ / V _T ), which is the rate of the velocity V ₁ (m ³ / min) of air sucked from the inlet.

Then, the suction ratio control means determines the residence time of the air passing through the ultraviolet irradiation region in the air sterilization unit according to the suction speed V _T (m ³ / min) of the entire air. _The suction ratio (V ₁ / V _T ) is controlled so as to be _pd (seconds), or in the air sterilization unit according to the suction speed V _T (m ³ / min) of the entire air. It is preferable that the suction ratio (V ₁ / V _T ) is controlled so that an integrated ultraviolet irradiation amount with respect to the air passing through the ultraviolet irradiation region becomes 7 mJ / cm ² or more.

  Furthermore, in the air conditioner of the present invention, an ultraviolet light emitting element that emits ultraviolet rays having a peak in the wavelength region of 240 to 280 nm is used as a light source of ultraviolet rays emitted from the ultraviolet ray emitting unit. It is preferable.

  According to the air conditioner of the present invention, the air sterilization unit and, if necessary, the suction ratio control means are attached to the indoor unit of a general package type air conditioner (package air conditioner), so that sterilization can be ensured. The conditioned air can be supplied to the room in harmony. Moreover, since the air sterilization unit does not require a blowing means such as a fan, the air sterilization unit can be reduced in weight. As a result, the air sterilization unit can be easily installed in a place with a sufficient installation area such as a ceiling or a ceiling. As a result, it is possible to secure a large volume of ultraviolet irradiation area compared to general air purifiers, and to sterilize a large amount of air at once, purifying the air in the whole room in a shorter time. It becomes possible.

  In addition, when the filter is attached to the air sterilization unit, the filter-treated and sterilized air is sucked into the indoor unit, so that not only the filter contamination of the indoor unit can be reduced, but also on the surface of the indoor heat exchanger, etc. It is also possible to suppress the growth of microorganisms.

Further, when the air discharged from the air discharge port of the air sterilization unit and the indoor atmosphere air that does not pass through the air sterilization unit can be simultaneously sucked from the intake port of the indoor unit, In an air conditioner that can be changed greatly, for example, about 7 to 20 (m ³ / min) according to the air blowing intensity mode (such as fine, weak, strong), the air blowing intensity is increased (the air flow rate is increased). Even in this case, the speed of the air passing through the sterilization unit can be adjusted to a speed at which sufficient ultraviolet sterilization can be performed.

  Furthermore, when an ultraviolet light emitting element that emits ultraviolet rays having a peak in the wavelength range of 240 to 280 nm is used as an ultraviolet light source, not only efficient ultraviolet sterilization can be performed but also ozone is generated from oxygen. Unlike the case of using an ultraviolet lamp that inevitably emits ultraviolet rays having such a short wavelength, harmful ozone is not generated.

This figure is a schematic diagram for explaining a heat pump refrigeration cycle constituted by each device of an outdoor unit and an indoor unit in the air conditioner of the present invention. This figure is a schematic diagram showing a state when an indoor unit and an air sterilization unit in a typical air conditioner of the present invention are arranged indoors. This figure is a schematic view showing a state when an indoor unit and an air sterilization unit in another representative air conditioner of the present invention are arranged indoors. This figure is the schematic of the air sterilization unit which can be used with the air conditioning apparatus of this invention. This figure is the schematic of another air sterilization unit which can be used with the air conditioning apparatus of this invention.

  The above-mentioned operation and gain of the present invention will be clarified from embodiments for carrying out the invention described below. Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the present invention is not limited to these forms. Further, the drawings do not necessarily reflect accurate dimensions, and some symbols may be omitted from the drawings.

  The air conditioner of the present invention includes an outdoor unit and an indoor unit as in the conventional package type air conditioner. The structure of the outdoor unit and the indoor unit is the same as that of the conventional package type air conditioner. That is, as shown in FIG. 1, the outdoor unit 100 includes an outdoor fan 110, a compressor 120, an outdoor heat exchanger 130, and an expansion valve 140. The indoor unit 200 has an air inlet 211 and an air outlet 212, and is disposed in the first casing 210 having the first air passage 214 formed therein and in the first air passage 214, respectively. Indoor fan 230 and indoor heat exchanger 220. The compressor 120, the outdoor heat exchanger 130 and the expansion valve 140 of the outdoor unit 100, and the indoor heat exchanger 220 of the indoor unit 200 are connected via a refrigerant pipe 160 to constitute a heat pump refrigeration cycle. ing.

  As shown in FIGS. 2 and 3, in the indoor unit 200, the indoor heat exchanger 220 and the indoors in the air passage 214 from the upstream (inlet port) side to the downstream (blower port) side. The fans 230 are arranged in this order, and drain pans 240 a and 240 b are arranged below the indoor heat exchanger 220. Condensed water (drain) generated on the surface of the indoor heat exchanger 220 during the air conditioning falls from the surface to the drain pans 240a and 240b, and outside the indoor unit (mainly outdoors) through the drain piping connected to the drain pan. Discharged. Further, a filter 213 for collecting dust and dirt contained in the indoor atmosphere air sucked from the intake port 211 is installed on the upstream side of the air flow path 220 with respect to the indoor heat exchanger 220.

  The indoor unit 200 shown in FIGS. 2 and 3 is a wall-hanging type. However, in the air conditioner of the present invention, if the indoor unit has such a basic structure, a ceiling cassette type, a ceiling embedded type, A ceiling-suspended type or a floor-mounted type can be used without particular limitation.

  The air conditioner of the present invention has a great feature in that an air sterilization unit 300 is attached and sterilized air discharged from the air sterilization unit 300 is sucked into the indoor unit 200 from the intake port 211. The air sterilization unit 300 includes an air suction port 320 and an air discharge port 330, and includes a second casing 310 having a second air passage 340 formed therein, and an ultraviolet emitting unit 353 that emits ultraviolet rays. , Does not have air blowing means. And the said air is sterilized by irradiating the ultraviolet-ray radiate | emitted from the said ultraviolet-ray emission part 353 with respect to the air which exists in the ultraviolet irradiation area | region 341 provided in said 2nd ventilation path 340. FIG. As described above, the air sterilization unit 300 has no air blowing means, but can move the air in the second air passage 340 by the suction force of the indoor fan 230 of the indoor unit 200. It has become.

  In order to allow the air discharged from the air discharge port 330 of the air sterilization unit 300 to be sucked into the indoor unit 200 from the intake port 211 using the suction force of the indoor fan 230, for example, the air discharge unit The air sterilization unit 300 may be arranged so that the outlet 330 is close to the intake port 211, or the air discharge port 330 and the intake port 211 may be connected by a pipe such as a duct.

  2 and 3, the indoor unit 200 is attached to the upper portion of the indoor surface of the wall 1, and the air sterilization unit 300, 300 ′ is installed on the indoor side of the ceiling 2 with the air outlet 330 close to the air inlet 211. It is installed on the surface (Fig. 2) or the back of the ceiling (Fig. 3). In addition, the air discharged from the air discharge ports 330 of the air sterilization units 300 and 300 ′ and the indoor atmosphere air that does not pass through the air sterilization units 300 and 300 ′ are simultaneously sucked from the intake port 211 of the indoor unit 200. In order to do so, the air inlet 211 is divided into an air inlet 211a for sterilizing air and an air inlet 211b for atmospheric air, and the air outlet 330 and the air inlet 211a for sterilizing air are connected by piping such as a duct. It is connected.

Further, in the air conditioner of the present invention, the indoor unit is provided with a suction ratio control means (not shown), and the air occupies the entire suction speed V _T (m ³ / min) of air sucked from the air inlet of the indoor unit. The suction ratio (V ₁ / V _T ), which is the ratio of the velocity V ₁ (m ³ / min) of air discharged from the air discharge port of the sterilization unit and sucked from the intake port, can be controlled.

Such suction ratio control means, sterilizing the opening area of the air intake port 211a and _{S a,} when the atmosphere air inlet 211b opening area _{S b,} S a _/ the value of _(S a + S _b) Is preferably a means (for example, a slide auto damper mechanism) for moving the position of the partition member between the sterilizing air inlet 211a and the atmospheric air inlet 211b so that becomes equal to (V ₁ / V _T ). Can be adopted.

By using such a suction ratio control means, the air flow rate can be changed greatly, for example, about 7 to 20 (m ³ / min) in accordance with the air blowing intensity mode (such as fine, weak, strong). Even in the case where the air blowing intensity is increased (the air flow rate is increased) in the air conditioner configured as described above, the suction speed (V ₁ / V _T ) is controlled to be small so that the speed of the air passing through the sterilization unit is sufficient. It is possible to adjust the speed so that ultraviolet sterilization is possible.

In the above intake ratio control means, the cumulative amount of ultraviolet irradiation for air passing through the UV irradiation region in the air sterilizing unit 7 mJ / cm ² or more, preferably 10 mJ / cm ² or more 100 mJ / cm ² or less, most It is preferable to control the suction ratio (V ₁ / V _T ) so that it is preferably 15 mJ / cm ² or more and 70 mJ / cm ² or less. For this purpose, the residence time of the air passing through the ultraviolet irradiation region in the air sterilization unit gives the integrated ultraviolet irradiation amount based on the intensity of ultraviolet rays to be irradiated and the size (volume) of the ultraviolet irradiation region. The suction ratio (V ₁ / V _T ) may be controlled so that the stay time t _pd (seconds) is _reached . Such control is based on the specifications of the air sterilization unit (specifications such as the intensity of ultraviolet rays to be irradiated and the size of the ultraviolet irradiation area), and V ₁ (m ³ / min) and the air passing through the ultraviolet irradiation area in advance. The total ultraviolet irradiation amount I _total with respect to I _total is examined so that V _{1 -calc} (m ³ / min) can be determined so that I _total becomes the above preferred value. for each intensity mode (actual value of _{V T),} to determine the actual value _{V 1-calc} of _{V 1} ^{(m 3} / min) becomes equal to the suction ratio _(V 1 / V _T), the air blowing intensity mode sometimes the set (decided actual value of V _T), it is preferable to be automatically controlled to a suction ratio corresponding to the (actual value of V _T) of the air blowing intensity mode is set.

  In the air sterilization unit used in the present invention, an ultraviolet light emitting diode (UV-LED) is used as a light source of ultraviolet rays emitted from the ultraviolet ray emitting portion from the viewpoint that the apparatus can be downsized and maintenance can be facilitated. Is preferred. Furthermore, for the reason that the bactericidal effect is high, it is preferable to use a UV-LED that emits ultraviolet light having a peak in a wavelength region of 240 nm or more and 280 nm or less.

  Further, in the air sterilization unit used in the present invention, it is preferable that a dust-proof filter is disposed at the air suction port, and ultraviolet leakage prevention means is provided at the air suction port and / or the air discharge port. It is preferable.

  FIG. 4 shows a schematic diagram of an air sterilization unit 300 preferably used in the air conditioner of the present invention. The air sterilization unit 300 has a vertically long flat box-like second casing 310 made of metal, resin, or the like. One width surface (the surface surrounded by the width and height of the box) of the second casing 310 is opened to form an air suction port 320, and an air discharge port 330 is opened in the other width surface. A second air passage 340 is formed. The main part of the second air passage 340 is an ultraviolet irradiation region 341. The air discharge port 330 is provided with a connection port 331, and the sterilized air from the connection port 331 through the second air passage 340 and the ultraviolet irradiation region 341 through a duct or the like is an indoor unit. The air is sucked from 200 sterilization air inlets 211a.

  On the bottom surface of the second casing 310, an ultraviolet light emitting portion 353 that is a surface light emitter (light guide plate) having substantially the same shape and size as the bottom surface is installed, and a surface light emitter (inside the second casing 310 ( The upper space of the light emitting surface of the light guide plate is an ultraviolet irradiation region 341. The inner surface of the ultraviolet irradiation region 341 (excluding the light emitting surface of the surface light emitter) has a reflectance of 40% or more, preferably 60% or more, and most preferably 70% for ultraviolet light having a wavelength of 240 to 280 nm, preferably 250 to 270 nm, particularly 265 nm. % Of the ultraviolet reflecting material is preferable, and from the viewpoint of durability, the ultraviolet reflecting material is preferably coated with a material having high transparency to the ultraviolet light, such as quartz and fluororesin. . As an example of an ultraviolet reflecting material, chromium (ultraviolet ray reflectance: about 50%), platinum (ultraviolet ray reflectance: about 50%), rhodium (ultraviolet ray reflectance: about 65%), magnesium carbonate (ultraviolet ray reflectance: About 75%), calcium carbonate (ultraviolet reflectance: about 75%), magnesium oxide (ultraviolet reflectance: about 90%), aluminum (ultraviolet reflectance: about 90%), and the like.

  A plurality of ultraviolet light emitting diodes (UV-LEDs) 350 are arranged on the end surface of the ultraviolet emitting portion 353 on the air inlet 320 side. The plurality of UV-LEDs 350 are made of a metal such as aluminum or copper, and are mounted on a heat sink substrate 351 having an insulating layer or wiring as necessary. The UV-LED mounting substrate surrounds the air inlet 320. Embedded in the heat insulating material 360. The heat insulating material 360 has a function of preventing the peripheral member from directly touching the heated LED mounting substrate and being heated.

  The heat sink substrate 351 has heat radiating fins 352, which are exposed from the heat insulating material 360 so as to extend in the top surface direction of the second casing 310, and UV− Heat generated from the LED can be dissipated.

  Further, a dustproof filter 370 is detachably disposed upstream from the place where the UV-LED mounting substrate is disposed. Furthermore, electric power for turning on the UV-LED is supplied to the air sterilization unit 300 by an electric cord connected to an external power source (not shown).

  Although the air sterilization unit 300 using the light guide plate is shown in FIG. 4, ultraviolet rays emitted from the UV-LED may be directly irradiated to the intake air without using the light guide plate. The air sterilization unit 300 ′ shown in FIG. 5 is an example of a type that directly irradiates the intake air with ultraviolet rays emitted from the UV-LED, and two substrates 351 a and 351 b on which a plurality of UV-LEDs 350 are mounted are on the air inlet 320 side. And on the air outlet 330 side. These substrates 351a and 351b are both disposed at a predetermined angle with respect to the bottom surface and the top surface of the second casing 310, and the UV-LED is irradiated with ultraviolet rays while being repeatedly reflected on the inner wall surface of the second air passage 340. The air in the area 341 can be irradiated with ultraviolet rays.

What is necessary is just to determine suitably the volume of the ultraviolet irradiation region 341 in the 2nd casing 310 in an air sterilization unit according to the capability of the indoor fan 230, LED output, etc. so that it can fully sterilize. From the viewpoint of supplying conditioned air containing as much sterilizing air as possible with a large air volume and sterilizing the atmospheric air in the entire room in a short time, the volume of the ultraviolet irradiation region 341 is set to the following value. It is preferable. That is, when the air conditioner is operated at the maximum air volume, the entire suction speed V _Tmax (m of the air sucked from the intake port 211 (the sterilization air intake port 211a and the atmospheric air intake port 211b) of the indoor unit 200. ³ / min), when the speed of the sterilized air discharged from the air outlet 330 of the air sterilization unit 300 is V ₁ (m ³ / min), V ₁ / V _Tmax is 1 / The volume is preferably 20 to 1/5.

For example, when 100 UV-LEDs with an output of 100 (mW) are used to sterilize air passing through an ultraviolet irradiation region having a width of 1 (m), a length of 2 (m) and a height of 0.2 (m), the principle Specifically, air irradiated with ultraviolet rays at 12 (mJ / cm ² ) can be supplied at a speed of 1 m ³ / min. Incidentally, it is known that the amount of UV irradiation necessary to inactivate 99.9% of influenza virus is 6.6 mW sec / cm ² (= mJ / cm ² ) when 254 nm UV light is irradiated. Even if V ₁ is increased to 1.8 (m ³ / min), 99.9% inactivation of influenza virus is possible. Therefore, when the air sterilization unit having the above specifications is used, even when the air conditioner is operated at a maximum wind speed of 20 (m ³ / min), it was sterilized at a rate of about 1/10. Conditioned air containing air can be supplied indoors.

  The indoor unit of the present invention has been described above with reference to the drawings. However, the present invention is not limited to this, and various modifications can be made without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 ... Wall 2 ... Ceiling 100 ... Outdoor unit 110 ... Outdoor fan 120 ... Compressor 130 ... Outdoor heat exchanger 140 ... Expansion valve 150 ... Four-way switching valve 160 ... Refrigerant pipe 200 ... Indoor unit 210 ... First casing 211 ... Intake port 211a ... Sterilization air intake port 211b ... Ambient air intake port 212 ... Blowing port 213 ... Filter 214 ... First air passage 220 ... Indoor heat exchanger 230 ... Indoor fans 240a, 240b ... Drain pan 300, 300 '... Air sterilization unit 310 ... Second Casing 320 ... air inlet 330 ... air outlet 331 ... connection port 340 ... second air passage 341 ... ultraviolet irradiation region 350 ... ultraviolet light emitting diode (UV- ED)
351, 351a, 351b... Heat sink substrate 352... Fin 353.

Claims (6)

An outdoor unit having an outdoor fan, a compressor, an outdoor heat exchanger, and an expansion valve;
An indoor unit having a first casing having an air inlet and an air outlet and having a first air passage formed therein, and an indoor fan and an indoor heat exchanger respectively disposed in the first air passage ,When,
An air conditioner in which a compressor of the outdoor unit, an outdoor heat exchanger and an expansion valve, and an indoor heat exchanger of the indoor unit are connected via a refrigerant pipe to constitute a heat pump refrigeration cycle,
An ultraviolet ray provided in the second air passage having an air inlet and an air outlet, a second casing having a second air passage formed therein, and an ultraviolet ray emitting portion for emitting ultraviolet rays. Further comprising an air sterilization unit that sterilizes the air by irradiating the ultraviolet light emitted from the ultraviolet light emitting unit to the air present in the irradiation region;
The air sterilization unit does not have a blowing means,
The air in the second air passage is moved by the suction force of the indoor fan of the indoor unit, discharged from the air discharge port of the air sterilization unit, and the discharged air is sucked from the intake port of the indoor unit An air conditioner characterized by that.   The air discharged from the air discharge port of the air sterilization unit and the indoor atmosphere air that does not pass through the air sterilization unit are simultaneously sucked from the intake port of the indoor unit. The air conditioning apparatus described. Velocity V ₁ of the air discharged from the air discharge port of the air sterilization unit and occupying the intake velocity V _T (m ³ / min) of the whole air sucked from the intake port of the indoor unit suction ratio is a ratio of m 3 ^/ min) for controlling _(V 1 _/ V _T), and having a suction ratio control means, the air conditioning apparatus according to claim 2. It said suction ratio control means, depending on the overall air intake velocity V _{T (m} 3 ^/ min), the residence time of air passing through the UV irradiation region in the air sterilizing unit is a predetermined dwell time t _pd ( The air conditioning apparatus according to claim 3, wherein the suction ratio (V ₁ / V _T ) is controlled to be equal to (second). The suction ratio control means has an integrated ultraviolet irradiation amount of 7 mJ / cm ² or more for air passing through the ultraviolet irradiation region in the air sterilization unit in accordance with the suction speed V _T (m ³ / min) of the entire air. The air conditioner according to claim 3, wherein the suction ratio (V ₁ / V _T ) is controlled so that   6. The air conditioner according to claim 1, wherein an ultraviolet light emitting element that emits ultraviolet light having a peak in a wavelength region of 240 to 280 nm is used as a light source of ultraviolet light emitted from the ultraviolet light emitting unit.

Images