JP3364708B2 - Air conditioner - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner equipped with sterilizing means and a sterilizing method. More specifically, the present invention relates to an air conditioner equipped with a sterilizing means and a sterilizing method in a medical facility such as a hospital or a food manufacturing facility.

[0002]

2. Description of the Related Art Heretofore, various sterilizing apparatuses and methods for air conditioners have been proposed as follows.

(1) There are various kinds of ozone gas, UV lamps, chemicals, etc. for sterilization of microorganisms inside the air conditioner, in hospitals, in hospitals, in the room where sterilization is required, such as in food production.

(2) Some air conditioners are provided with sterilizing means in the air, such as an ozone generator and an ozone decomposition catalyst device (for example, see Japanese Patent Laid-Open No. 8-114332).

(3) An ozone generator is provided inside the air conditioner to generate ozone when the room requiring sterilization is unattended to sterilize the air conditioner itself and the room (for example, Japanese Patent Laid-Open No. 5-322220). (See Japanese Patent Publication).

(4) Inside the air conditioner, an ozone generator,
A device provided with a sheet filter containing an antibacterial agent such as silver zeolite in addition to the ozone decomposition catalyst device (see, for example, Japanese Patent Laid-Open No.
-323571).

Further, the inside or the inner wall of the air conditioner, the heat exchanger,
There is one in which a sheet containing an antibacterial agent such as silver zeolite is pasted or a coating film is formed on the surface of a fan, a filter or the like (see, for example, JP-A-7-55176).

(5) There is an air-conditioning duct equipped with an ultraviolet lamp, a dust collecting electrode, etc. to sterilize microorganisms (see, for example, JP-A-7-303688).

(6) A photocatalyst provided outside the ultraviolet lamp (for example, see Japanese Patent Laid-Open No. 8-121827).
There is.

[0010]

The sterilization process performed by the above-mentioned conventional air conditioner is not sufficient. Therefore, there is a possibility that the air in which the microorganisms have propagated may be sent to, for example, a hospital room or a food manufacturing room.

In the above-mentioned prior art, since the sterilizing means is simply provided inside the air conditioner or in the flow path, the flow through the room or the air conditioner is transient, and therefore, for example, even in the air conditioner itself. However, I couldn't quite sterilize it.

In particular, conventionally, since the sterilizing means is provided inside the air conditioner, this cannot be done when it is desired to sterilize the room or the air conditioner itself in a concentrated manner.

Even if there is a conventional one that is circulated for sterilization as in the above (3), it cannot be used when there is a person in the room.

Further, since the sterilizing means is provided inside the air conditioner, when repairing or replacing the sterilizer, it is necessary to stop the air conditioner one by one, which requires labor and cost.

Further, due to the structure in which the sterilizing means is provided inside the air conditioner, the scale and capacity of the air purifier have been limited due to its spatial limitation.

Further, since the sterilizing means is provided inside the air conditioner, it is difficult to adjust the sterilizing action as necessary.

When it is desired to attach a sterilizer to an existing air conditioner, it is difficult to attach it because it has a built-in system.

When the antibacterial agent sheet is used as a sterilizing means for a long period of time, dust, oil smoke, and the like adhere to the surface of the coating film containing the antibacterial agent, which prevents direct contact with microorganisms or immediate approach. When it is done, the antibacterial effect is significantly reduced. Therefore, the antibacterial action is significantly impaired, and invasion of bacteria and the like cannot be avoided.

The present invention provides a room for improving the above problems,
It is an object of the present invention to provide an air conditioner and an air conditioner capable of sterilizing air such as a flow path associated therewith. More specifically, it is an object of the present invention to obtain an air conditioner that can sterilize an indoor air conditioner and / or an air conditioner singly or both.

[0020]

In order to solve the above problems, according to the present invention, a first passage 43 and an air conditioner connecting an outlet side of a room 3 of a hospital or a food manufacturing facility and an inlet side of an air conditioner 1 are provided. 1, a second passage 41 and a third passage 42 connecting the outlet side of the chamber 3 and the inlet side of the chamber 3, and a fourth passage 44 connecting the outlet side of the air conditioner 1 and the inlet side of the air purifier 2. And a fifth passage 46 connecting the outlet side of the air purifier 2 and the outlet side of the air conditioner 1, and a sixth passage 40 connecting the outlet side of the air purifier 2 to the second and third passages. The switching control means for each circulation path and each passage is composed of a first passage 43,
The second and third passages 41, 42, and the fifth passage 46 are provided, and the sixth passage 40 is provided with a check valve 33. The check valve 33 is sterilized in the room, the air conditioner, and the air conditioner and the room. Provided is an air conditioner that performs the four functions of supplying sterilized circulating air into a room.

Since the sixth passage 40 connecting the outlet side of the air purifier 2 and the second and third passages 41 and 42 is provided with a venturi means composed of a nozzle portion and a throat portion, The suction effect can be enhanced.

For the passage of circulating air between the room and the air conditioner,
Since the air purifier is separately provided and the circulation path is provided in parallel with the air conditioner, it is possible to sterilize the room or the air conditioner itself independently and intensively.

In particular, since the air purifier is provided in parallel with the air conditioner, the purifying function is further enhanced as compared with the conventional air conditioner built-in type. Also, if necessary, increase the capacity of the air purifier or replace it with another one.

Further, since the air purifier is installed side by side, the repair or replacement of parts does not have to be stopped but the operation of the air conditioner can be immediately performed.

Further, since the air purifier is provided in parallel with the air conditioner, the necessary amount for sterilizing action is adjusted by the valve mechanism.

When the air conditioner is stopped, a circulatory path is formed by the switching control means in the room or the air conditioner, or both of them, and sterilization is performed even when manned or unmanned.

When there is no person in the room such as at night when the air conditioner is stopped, or when there is no person in the room, the switching control means forms a circulation path to sterilize the inside of the room.

When the air conditioner is stopped, sterilization of the air conditioner itself can be performed by the switching control means by forming a circulation path regardless of manned or unmanned.

Further, even when a person is always in the room and the air conditioner is operating, a part of the air is guided to the air purifier by the switching control means and sterilized by the sterilization means. To do. Also in this case, the sterilization action is controlled by the valve mechanism.

[0030]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described based on examples with reference to the drawings. FIG. 1 shows an embodiment of the present invention.

FIG. 1 shows an embodiment of the present invention. Air conditioner 1, air purifier 2, interior of hospital or food manufacturing plant 3,
The outside air intake 27 and the like are shown.

From the outside air intake 27, the air enters the air conditioner 1 through the filter 4, the duct 45, and the automatic switching valve 30 as in the conventional case.

FIG. 1 shows a pre-filter 5, a medium-performance filter 6 (or an electric dust collector 7), a heat exchanger 8, a humidifier 10, a blower 9, a heat insulating material 19, and a casing 36 in the air conditioner 1. .

In addition, a humidifier 10, a drain pan 11 for storing water drops, and an eliminator 2 which is a draining filter.
0 is provided for each.

On the inside surface of these air conditioners, an antibacterial agent may be contained in a coating film or the like and held. In this case, the purifying ability should be improved in combination with the air purifier 2. You can The antibacterial agent is contained in paint etc., and it is applied by baking coating, roller coating, spraying, etc.

As the antibacterial agent, an inorganic material such as silver, zinc oxide or copper is used alone or in a mixture. By the action of the antibacterial agent, the growth of bacteria such as bacteria and mold on or near the surface of the coating film is suppressed, and the sterilization can be reduced.

An ultraviolet lamp 13 may be provided inside the air conditioner 1 in order to obtain a sterilizing effect. Instead of a coating film containing an antibacterial agent or the like, the photocatalyst 14 is attached to the inside of the air conditioner 1 as a filter containing a photoexcitation catalyst that has the effect of cooperating with ultraviolet rays, or a coating film containing a photocatalyst is formed. For example, on the inner and outer surfaces of the drain pan, a photocatalyst film is applied or the surface of the coating is processed within the irradiation range of ultraviolet rays. Alternatively, the photoexcited catalyst film 21 may be provided on the wall surface as shown in the drawing to sterilize the collected microorganisms by irradiating the ultraviolet lamp 13 with light.

The air purifier 2 is installed side by side with the air conditioner 1, and a pre-filter 5, a medium performance filter 6 (or an electric dust collector 7), a fan 12, an ultraviolet lamp 13, a photocatalyst 14 and the like are provided inside thereof.

Further, as in the case of the air conditioner, an antibacterial agent may be contained in a coating film or the like and held on the inner surface thereof.

FIG. 2 shows an ultraviolet lamp 13, an ozone generator 15, an ozone inlet 16, an ozone decomposition catalyst device 17.
And another damper 18 is provided. In this case, since the fan 12 is of a suction type, the ozone gas is
Does not leak outside.

The damper 18 is, as shown in FIG.
Move to the position indicated by the dotted line. The damper 18 needs to be decomposed by the ozone decomposing catalyst device 17 when the circulating air is being sent to the manned chamber 3, so that the damper 18 is moved to recirculate through the ozone decomposing catalyst device 17. Let

Further, if the air purifier 2 is provided with a normal shutoff valve 26 at its inlet and outlet, both of them can be closed, and the air purifier 2 can be removed and replaced or repaired even while the air conditioner 1 is in operation.

Automatic switching valves 28, 29 and 30 are provided in the middle of the duct for switching the circulating air to the room or the air conditioner (see FIG. 3). Further, automatic switching valves 31, 32 and a check valve 33 are provided. Further, the flow rate control valve 34 is provided in the duct 44. In addition to this, the valve is not limited to an automatic switching valve, and various control valves such as a flow control valve are adopted as needed.

The automatic switching valve 32 is provided in the duct 46, but since it is connected to the suction side of the blower 9 of the air conditioner 1, when the air conditioner 1 is operated, it is automatically sucked in and a special suction device is provided. Is not necessary.

In particular, without providing the automatic switching valves 31 and 32 and the check valve 33, the portion A shown in FIG. 4 may be replaced with the venturi pipe 50 as shown in FIG. Blower 9
Since the air discharged from the air is squeezed by the narrow throat portion 500, the pressure drops and sucks the flow on the duct 40 side. Alternatively, it may have a nozzle shape so that the tip of the duct 40 can be ejected.

Contrary to the above example, the configuration of the Venturi tube 50 is as follows:
The duct 40 side can also be designed as the attracted side.

The characteristics of the sterilizing system for pathogenic bacteria will be further described. In the air purifier 2, the components of the sterilizing system are the ultraviolet lamp 13 and the photocatalyst 14 for non-treated air.
It is the order of.

Regarding the irradiation of ultraviolet rays, it is also possible to carry out irradiation in two stages with different wavelengths, with and without a photocatalyst. That is, the airborne bacteria contained in the untreated air are first irradiated with the ultraviolet lamp 13 having a wavelength of 254 mm. Here, the light energy of the ultraviolet lamp 13 damages the DNA of the bacterium, and as a result, the self-proliferation function is deteriorated by the formation of chimming dimers. The UV light 13 at the front of FIGS. 1 and 2 performs this function.

After that, the titanium oxide photocatalyst 14 (anatase type) having an oxidation-reduction potential of 3 V by the light of the ultraviolet lamp 13 is used.
Are activated, active oxygen is generated, and bacterial spores and verotoxin are destroyed. It was confirmed by experiments that the sterilization effect can be further improved by changing the wavelength of the ultraviolet rays and irradiating the ultraviolet rays in two steps. The irradiation may be reversed, but the effect will be reduced. The reason is that active oxygen changes the surface layer of spores and part of the DNA inside, resulting in UV
This is because the generation of TDHT in spores is suppressed during irradiation, and some bacteria cannot be completely sterilized. Further, the reason why ozone treatment is performed after the photocatalyst is that the former has a higher redox potential.

For airborne bacteria contained in untreated air, a combination of a titanium oxide photocatalyst as a photocatalyst and an ultraviolet lamp of a specific wavelength is effective. A feature of the titanium oxide photocatalyst system is that the reaction occurs when its surface comes into contact with water. Due to its adsorptive properties, the same happens on contact with air unless it is completely dry.

With respect to the titanium oxide photocatalyst, ultraviolet rays having a wavelength range of 315 to 400 nm are preferable for exciting the photocatalyst. When an ultraviolet lamp having a wavelength of about 400 nm hits the surface of titanium oxide, a strong oxidation potential of 3 v is generated on the titanium oxide photocatalyst (anatase type), water is decomposed and active oxygen is generated. This has a larger oxidation potential than chlorine, hydrogen peroxide, ozone, etc., and can decompose and oxidize almost everything. On the other hand, the ultraviolet light in the vicinity of the fan 12 without the photocatalyst 14 may be a normal germicidal lamp having a wavelength of 100 to 280 nm.
Although it has the effect of causing that effect on the photocatalyst,
This is because the effect is lower than that of the ultraviolet lamp.

Even if the ozone generator 15 is provided, the sterilization effect can be improved in addition to the above-mentioned sterilization effect. However, in the case of human beings, ozone is harmful to the human body at a certain concentration or higher, and therefore ozone is harmful. Circulation is carried out through the cracking catalyst device 17.

The air sterilized in this manner circulates in the air conditioner and / or the room to continuously perform the purifying action.

In the air conditioner 1, the prefilter 5, the filter 6, the heat exchanger 8, the blower 9, the humidifier 10, the drain pan 11, the eliminator 20, and the air conditioner casing 36 are made of antibacterial agents which are expected to be effective at all times. be able to. As the antibacterial agent, an inorganic antibacterial agent that is safe and has high heat resistance is used. On the surface of the inner wall of the air conditioner 1, antibacterial paint, antibacterial film, sheet, non-woven fabric, etc.
Painted or pasted.

As the fibers of the prefilter, the medium-performance filter, etc., an antibacterial agent is carried on the surface or fibers containing an antibacterial agent are used.

The inorganic antibacterial agent has a broad antibacterial spectrum and is effective in not causing resistant bacteria. As a method of maximizing the sterilization effect, when the antibacterial agent is mixed with the paint, the dispersibility is improved and the antibacterial effect can be improved by floating the antibacterial agent on the surface.

Bacteria that have come into contact with the antibacterial agent die by causing metal cations (eg, silver, zinc, copper ions, etc.) to destroy the protein and cause a lytic phenomenon. The air conditioner 1 is mainly provided with a function of sterilizing dropped bacteria. The above configuration enables systematic sterilization.

If a coating film containing an antibacterial agent is applied to the inside of the air conditioner 1, the growth of bacteria or the like is usually suppressed inside the air conditioner 1, and the sterilizing action is always performed regardless of whether ozone gas is generated or not. receive.

As described above, the antibacterial agent can be expected to have a constant sterilizing effect. In addition, when used in combination with ozone gas, it becomes possible to further sterilize the bacteria, and the sterilization time can be shortened.

When dust or oily smoke adheres to the inner surface of the air conditioner 1, as a result of the air purifier 2 being provided in the present invention, the air conditioner is continuously operated for repeated sterilization. The sterilization of the inside of 1 becomes good. This action will be described below.

In performing sterilization, the following processes are generally performed in a room or an air conditioner. 1 and 2
In this case, an example will be described. (1) Indoor sterilization (air conditioner stopped), 1 in FIG. 6 (2) Air conditioner sterilization (air conditioner stopped), 2 in FIG. 6 (3) Indoor and air conditioner sterilization (air conditioner stopped), FIG. 3 (4) Supply of sterilized circulating air into the room (during operation of the air conditioner), 4 in FIG.

(1) Room sterilization will be described. The automatic switching valves 28 and 29 are opened to guide the air from the chamber 3 to the air purifier 2 through the ducts 40, 42 and 43. In this case,
Since the operation of the air conditioner 1 is stopped, the automatic switching valve 31
If is closed, useless circulation can be stopped.

Therefore, the air in the chamber 3 can be sterilized by a continuous circulating flow.

In the embodiment using the ozone generator 15, the ozone-containing air may be sent to the chamber 3 at an unattended time when there is no harmful problem. In the unattended cases (1) and (3), the ozone generator 15 is stopped when the ozone concentration sensor 35 reaches a predetermined value. The operation of the fan 12 inside the purifier 2 is stopped. Further, by providing a timer, the ozone generator can be operated for a predetermined time in advance and then stopped to achieve the same ozone concentration. The sterilization inside the chamber 3 is performed when a predetermined time elapses while maintaining the ozone concentration inside the chamber 3.

After this, again, the fan 12 of the air purifier 2
Restart operation. However, at this time, the switching damper 1
8 moves to the position indicated by the broken line in FIG. In this way
The air inside the chamber 3 circulates, and the ozone is decomposed by the action of the ozone decomposition catalyst device 17. Hereinafter, in each example, the operation of the ozone decomposition catalyst device after sterilization is performed in the same manner.

In this way, the ozone concentration in the zero atmosphere inside the chamber 3 decreases and reaches the human safety limit or less. At that time, the operation of the air purifier 2 is stopped. Then, the operation of the air conditioner 1 can be restarted.

(2) Sterilization of the air conditioner will be described.

In the air purifier 2, air flows in from the air conditioner 1 by the duct 44 and the fan 12. It is guided to the rear side duct 41 of the blower 9 through the duct 40 through the regions such as the ultraviolet lamp 13 and the photocatalyst 14.

When the automatic switching valves 28 and 29 are closed, this inflow air is returned to the inside of the air conditioner 1 by opening the automatic switching valve 31. At this time, the air inside the air conditioner 1 circulates through the inside of the air purifier 2. If necessary, the automatic switching valve 32 can be opened to circulate the part of the air conditioner 1 excluding the blower 9. ,

When the ozone generator 15 is used,
Ozone-containing air is sent to the air conditioner 1. Air conditioner 1,
The ozone concentration inside the air purifier 2 rises, and when the ozone concentration sensor 35 reaches a predetermined concentration, the operation of the ozone generator 15 is stopped. By maintaining the ozone concentration inside the air conditioner 1 within a predetermined range for a certain period of time, the inside of the air conditioner 1 and the air purifier 2 is sterilized.

(3) The sterilization of the room and the air conditioner will be described. When the air conditioner 1 is stopped (usually at night), the air flows from the air conditioner 1 by obtaining the duct 44 and the fan 12. It is guided to the duct 40 through the regions such as the ultraviolet lamp 13 and the photocatalyst 14. In this case, since the air conditioner 1 is stopped, if the automatic switching valves 28 and 31 are opened, it will flow from the air purifier 2 into the air conditioner 1 and the chamber 3, and its flow will be the air purifier. Since it passes through the ducts 43 and 44 to 2, it is sterilized by the air purifier 2.

Further, the automatic switching valve 32 is opened and the duct 4 is opened.
A flow path from 6 to the air conditioner 1 may be formed. Both of the automatic switching valves 31 may be opened, or one of them may be opened, and this can be performed as needed.

The same applies when the ozone generator 15 is used. At this time, if the ozone supply path of the chamber is long, ozone may be decomposed with a normal material, and therefore ozone is supplied by a duct such as SUS, ABS resin, or vinyl chloride.

(4) The supply of sterilized circulating air into the room will be described. Further, even when the air conditioner 1 is operating in the room 3 in which a person is always present, a part of the air can be guided to the air purifier 2 to perform the sterilization action as described above.

In this case, the automatic switching valve 31 is opened to direct the flow from the air conditioner 1 to the chamber 3. When the discharge pressure of the blower 9 is higher than the pressure of the air purifier 2, the sterilized and deodorized air from the air purifier 2 is opened to the intake side of the blower 9 from the automatic switching valve 32. It automatically flows into the air conditioner 1 through the connecting duct 46. The flow from the duct 41 to the duct 40 is the check valve 33.
Blocked for.

In the case of the above-described embodiment (FIG. 2), when the ozone generator 15 and the ozone decomposition catalyst device 17 are used, the action of the ozone generator 15 and the ozone decomposition catalyst device 17 causes the air purifier 2 to operate during normal operation of the air conditioner. When the position of the switching damper 18 is moved to the broken line side and the air purifier 2 is operated, the air purifier 2
The air passing through is subject to sterilization.

The air subjected to the sterilization is supplied to the chamber 3 through the duct 40 and the like. By performing such air circulation, the sterilizing action in the air in the chamber 3 is continuously performed. The ozone from the ozone generator 15 is decomposed and rendered harmless by the action of the ozone decomposition catalyst device 17.

As described above, even when the air conditioner is not operating,
It is also possible to close the automatic switching valves 31 and 32 and send sterilized circulating air into the chamber 3.

When manned, the sterilized air can be circulated to the room and the air conditioner, but when it is not necessary to circulate the sterilized air to the air conditioner, the automatic switching valve 3
Close 1 and 32.

Further, since the circulating flow can be continuously formed, the circulating flow can be formed for the purpose of cleaning even if the sterilizing means is not operated.

As an antibacterial means, dust and oily smoke adhered to the antibacterial sheet or the portion coated with paint are removed by cleaning the sterilized air by simply circulating air even when the sterile air is being circulated. You can also do things.

In the above embodiment, the automatic switching valves 31, 32 are provided.
The case where the check valve 33 is provided has been described. The portion A shown in FIG. 4 is replaced with the venturi tube 5 as shown in FIG.
When it is set as 0, the following example will be described. (1) Indoor sterilization (air conditioner stopped) (2) Air conditioner sterilization (air conditioner stopped) (3) Indoor and air conditioner sterilization (air conditioner stopped) (4) Sterilized circulating air supply to the room (Operating air conditioner)

(1) When the sterilization air conditioner 1 in the room is stopped, the automatic switching valve 31 is closed, and the flow from the air purifier 2 is guided as it is to the room 3 through the ducts 40 and 42, and the duct 43. , 44, and is circulated to the air purifier 2 and sterilized.

(2) Sterilization of air conditioner Since the automatic switching valve 28 is closed when the air conditioner 1 is stopped, the flow from the air purifier 2 is guided to the air conditioner 1 through the duct 41 side. After passing through the duct 44, it is circulated to the air purifier 2 and sterilized.

(3) Sterilization of indoors and air conditioners When the air conditioner 1 is stopped (usually at night), the automatic switching valve 2
When the valves 8 and 31 are opened, the flow from the air purifier 2 passes through the nozzle portion 400 of the duct 40 of the Venturi pipe 50, sucks the air from the duct 41, and the duct 42.
Is led to room 3. The air guided from the room 3 to the air conditioner 1 goes to the air purifier 2 and the blower 9. As described above, the flow from the blower 9 to the duct 41 is sucked and circulated by the jet flow passing through the nozzle portion 400 of the duct 40 of the Venturi pipe 50, and one of the split flows passes through the duct 44 to purify air. It is circulated to the machine 2 and sterilized.

(4) Supply of sterilized circulating air into the room (during operation of the air conditioner) When the air conditioner 1 is in operation and manned, the automatic switching valves 28, 31
Is opened and, due to the Venturi effect, is guided to the chamber 3 through the duct 42, and is circulated to the air purifier 2 through the duct 44 to be sterilized.

When the ozone generator 15 is used, the same procedure as described above is performed.

As described above, the same operation can be performed by providing the structure of the Venturi tube.

When sterilizing a room, an air conditioner or an air purifier, the ducts attached to it are sterilized.
Of course.

[0090]

According to the present invention, in an air conditioner equipped with a sterilizing means, an air purifier is provided in parallel with the air conditioner, and a switching control means capable of sterilizing the air conditioner and the chamber individually or both. Therefore, the sterilizing action can be performed quickly and selectively for each of the air conditioner and the chamber or both of them.

By configuring the circulation path of the circulating flow connecting the air conditioner and / or the room and the air purifier by the switching control means, it is possible to continuously perform the sterilization action.

Conventionally, since sterilizing means is provided inside the air conditioner, it is possible to sterilize the room or the air conditioner itself in a concentrated manner.
The sterilization of the air conditioner itself, which was not possible before, has been realized.

In particular, since the air purifier is provided in parallel with the air conditioner, the purifying function can be further enhanced as compared with the conventional air conditioner built-in type, and if necessary, the air purifier can be expanded to increase the capacity. It is also possible to replace the air purifier with another.

Further, since the air purifier is installed side by side, the repair or replacement of the parts does not need to be stopped and the operation of the air conditioner can be immediately performed.

Further, since the air purifier is provided in parallel with the air conditioner, the sterilization action can be adjusted by providing the valve mechanism for controlling the flow rate.

When it was desired to attach a sterilizer to an existing air conditioner, it was difficult because it had a built-in system. However, since it only needs to be installed outside the air conditioner, it is possible to easily install the sterilizer. It is also possible for existing air conditioners.

When the air conditioner is stopped, a circulation path is formed by the switching control means, and sterilization of the room and the air conditioner can be performed independently or both of them, and even when manned or unattended. You can

The air conditioner can sterilize the inside of the room by forming a circulation path by the switching control means when there is no person in the room such as at night when there is no person in the room.

When the air conditioner is stopped, sterilization of the air conditioner itself can be performed by the switching control means regardless of manned or unmanned by forming a circulation path.

Further, even when a person is always in the room and the air conditioner is operating, a part of the air can be introduced to the air purifier by the switching control means and the sterilization means can perform the sterilization action. Yes, and its sterilization effect is controlled by a valve mechanism.

Further, even when the antibacterial means which is a sterilizing means is used, since the sterilizing air or the circulating air is circulated in the air conditioner, dust, oil smoke, etc. are prevented from adhering.

[Brief description of drawings]

FIG. 1 shows an embodiment of an air conditioner of the present invention.

FIG. 2 shows another embodiment of the air conditioner of the present invention.

FIG. 3 shows a valve mechanism as switching control means of the air conditioner of the present invention.

FIG. 4 shows another embodiment as the switching control means of the air conditioner of the present invention.

5 shows an enlarged view of part A of FIG. 3 of the air conditioner of the present invention.

FIG. 6 shows a relationship of sterilizing a room or an air conditioner by switching control means by the air conditioner and method of the present invention.

[Explanation of symbols]

1 air conditioner 2 Air purifier 3 rooms 4 filters 5 pre-filter 6 Medium performance filter 7 Electric dust collector 8 heat exchanger 9 blower 10 humidifier 11 drain pan 12 fans 13 UV lamp 14 Photocatalyst 15 Ozone generator 16 Ozone supply port 17 Ozone decomposition catalyst device 18 damper 19 thermal insulation 20 Eliminator 21 Photoexcited catalyst film 26 valves 27 Outside air intake 28 Automatic switching valve 29 Automatic switching valve 30 Automatic switching valve 31 Automatic switching valve 32 Automatic switching valve 33 Check valve 34 Flow control valve 35 Ozone concentration sensor 36 casing 40 ducts 41 duct 42 duct 43 duct 44 duct 45 duct 46 ducts 50 Venturi tube 400 nozzle 500 throat

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-8-200736 (JP, A) JP-A-2-302536 (JP, A) JP-A-3-213926 (JP, A) JP-A-5- 322220 (JP, A) JP-A-7-55176 (JP, A) JP-A-8-121827 (JP, A) JP-A-2-77524 (JP, A) JP-A-58-190635 (JP, A) JP-A 8-114332 (JP, A) JP-A 6-323571 (JP, A) JP-A 7-303688 (JP, A) Actually open 4-29618 (JP, U) Actually open 54-10200 (JP, U) (58) Fields surveyed (Int.Cl. ⁷ , DB name) F24F 3/16

Claims (3)

(57) [Claims] 1. A first passage 43 and an air conditioner 1 for connecting an outlet side of a room 3 of a hospital or a food manufacturing facility to an inlet side of the air conditioner 1.
Second passage 41 and third passage connecting the outlet side of the chamber and the inlet side of the chamber 3
, A fourth passage 44 connecting the outlet side of the air conditioner 1 with the inlet side of the air purifier 2, and a fourth passage connecting the outlet side of the air purifier 2 with the outlet side of the air conditioner 1. 5 of the passage 46 and the outlet side of the air purifier 2 and the second and third
The sixth passage 40 connecting the passages of the first passage 40 and the switching control means of the respective passages are provided as the first passage 43, the second and third passages 41, 42, and the fifth passage 46. In addition, the non-return valve 33 is provided in the sixth passage 40, and has four functions of sterilization of the room and the air conditioner, sterilization of the air conditioner and the room, and supply of sterilized circulating air into the room. Air conditioner characterized by 2. A venturi means comprising a nozzle portion and a throat portion is provided in an outlet side of the air purifier 2 and a sixth passage 40 connecting between the second and third passages 41 and 42. The air conditioner according to claim 1, wherein 3. The air conditioner according to claim 1, wherein the fifth passage 46 connects the outlet side of the air purifier 2 and the suction side of the blower 9 of the air conditioner 1.