JP2001248864A - Air conditioner and its system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air conditioner that can perform dehumidification in a room by utilizing the electroendosmose phenemonon of a proton exchange film, and at the same time is provided with a cooling function for also controlling the temperature in the room. SOLUTION: In the air-conditioning device that is provided with a catalysis layer and a gas diffusion layer while a proton exchange film is pinched by outer-air-side and inner-air-side plates, the outer-air-side and inner-air-side plates are provided with a capillary for supplying water that wets the proton exchange film, and the proton exchange film is humidified directly by water. Also, in the air-conditioning system where the humidification device of fuel batteries and the air-conditioning device are combined, one portion of wet air being generated by the humidification device is taken out of the latter or middle stage of the humidification device for air-conditioning.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dehumidifier having a cooling function having a proton exchange membrane and an air conditioning system, and more particularly, to a water tower such as a cooling tower for industrial use or a cooling fan for home use. Air cooling using latent heat of evaporation,
The present invention relates to an air conditioner and a system that combine a dehumidification method using an electroosmosis phenomenon of a proton exchange membrane.

[0002]

2. Description of the Related Art A conventional air-conditioning system using a proton exchange membrane utilizes an electroosmosis phenomenon of the exchange membrane to electrolyze and remove moisture in the atmosphere using a steam electrolysis cell.
2. Description of the Related Art A dehumidifier that discharges steam as electroosmotic water to the outside of a room is known. For example, Japanese Patent Application Laid-Open No. 62-277126 discloses that water contained in one electrode is removed by transferring protons from one side of a membrane to the other side by utilizing an electrolysis reaction of water. The disclosed moisture remover is disclosed. Japanese Patent Application Laid-Open No. 61-285326 also discloses that a belt-like body rich in water retention is rotated while being immersed in a liquid tank, so that the belt is passed and circulated through room air, thereby controlling indoor humidity. Is disclosed.
However, in any of the above methods and systems, the only effect in the room is dehumidification, and temperature control is not considered.

[0003]

SUMMARY OF THE INVENTION In view of the above problems, the inventors of the present invention utilize the electroosmosis phenomenon of the above-mentioned proton exchange membrane to perform indoor dehumidification and to control indoor temperature control. We worked diligently to develop an air conditioner with functions. As a result, the present inventors have found that when a combination of cooling by water evaporation and electroosmotic dehumidification of a polymer membrane has an entropy endothermic in a proton exchange membrane,
Cooling the indoor air is mainly performed by water evaporation in the cooling section, so the room can be cooled by selectively discharging the evaporated water vapor from the proton exchange membrane, which is a polymer membrane, to the outside, which solves this problem. I found something to be done. Also,
In such an air conditioning method, a polymer membrane is used as the proton exchange membrane. However, the polymer membrane is easily dried, and a problem that an overvoltage increases may occur. In order to avoid such a problem, it has been found that the overvoltage can be adjusted by flowing water for wetting the membrane through a thin tube through the proton exchange membrane which is a polymer membrane. The present invention has been completed from such a viewpoint.

[0004]

That is, according to the present invention, a proton exchange membrane is sandwiched between an outside air side plate and an inside air side plate having a gas passage, and a catalyst layer, And an air conditioner provided with a gas diffusion layer that is a porous electrode on the outside of each catalyst layer, wherein the outside air side plate and the inside air side plate each have a thin tube for supplying water for wetting the proton exchange membrane. The present invention provides an air conditioner which is provided for directly humidifying the proton exchange membrane with moisture. In this air conditioner, the cooling unit and the dehumidifying unit are integrated, or the outside air side plate unit and the inside air side plate unit are connected to load electric charges on the entire device. It is mentioned as a preferred embodiment.

[0005] In the air conditioner of the present invention, the plate on the outside air side
The (interconnector) is provided with a water supply passage to wet the proton exchange membrane, so that the introduced outside air is cooled by evaporating water from the wet membrane, and the cooled air cools the entire apparatus . The thin tube, which is a passage on the outside air side, supplies water for evaporative cooling. In addition, a water supply passage is also provided in the plate (interconnector) on the inside air side to wet the proton exchange membrane, which has the effect of preventing the electrical conductivity of the membrane from being lowered. The narrow tube, which is a passage on the inside air side, suppresses an increase in electric resistance due to drying of the film. Since the water supply capillary provided in the plate (interconnector) is formed into a thin hole, water is supplied by capillary action and the proton exchange membrane can be kept wet. The proton exchange membrane is of a direct humidification type, which replenishes moisture directly to the membrane, so that the thickness of the membrane can be increased and the reliability with respect to mechanical strength is improved. Furthermore, the present invention does not use a medium such as chlorofluorocarbon, and is therefore an environmentally superior technology. In addition, since the cooling unit and the dehumidifying unit are integrated in the device of the present invention, dehumidification and cooling can be performed in one cell, and the device structure is simple. The cost can be made lower than when trying to obtain In addition, by applying a charge to the entire device, the dehumidification and cooling unit are integrated, so that dehumidification is performed by water splitting and electroosmosis, and the carried water evaporates as outside air, and the device is cooled. Used for cooling.

On the other hand, since the supply amount of water can be controlled by the pressure, a response is made by a capillary phenomenon in order to reduce the influence of the fluctuation of the water carried by the inside air and the fluctuation of the evaporation amount due to the humidity of the outside air. If not, it is necessary to control the supply of water at a pressure higher than the pressure of the inside air or the outside air. For example, if the humidity of the inside air is low, increase the water supply,
Control so that the film does not dry abnormally. However, the outlet humidity is monitored so that the humidity of the inside air does not increase due to oversupply. If the humidity of the inside air is high, reduce the main supply amount on the inside air side. In a normal humidity range, the humidity of the inside air inlet / outlet is monitored and feedback control is performed so that the dehumidifying effect is not deteriorated due to excessive supply of moisture to the film surface on the inside air side. By controlling the supply amount of water on the outside air side, it is possible to perform cooling control based on the flow rate of outside air and the evaporation amount of water. However, if flooding occurs due to oversupply, the electric distribution of water and the electric penetration are hindered. Therefore, the humidity at the entrance of the outside air is monitored and feedback control is performed.

Further, the present invention is a system in which a humidifier for a fuel cell is combined with any one of the above-mentioned air conditioners. A system which is drawn out from the middle of the system and used for air conditioning. And as this air conditioning system, a part of the humid air generated from the humidifier is introduced into the gas passage of the inside air side plate of the air conditioner, or in the air conditioner, the outside air side plate having the gas passage is provided. It is preferable that the outside air taken into the gas passage be replaced with the inside air in the room to perform the inside air circulation.

In the air conditioning system of the present invention, a part of the generated humid air is used in combination with the humidifier of the fuel cell, so that heating is possible. In other words, wet / high temperature (60 ~ 90 ℃
Part of the air) to the inside of the air conditioner,
The entrapped air releases heat from the air conditioner to the outside air and loses moisture by electroosmosis. By this air-conditioning action, the air that has become suitable temperature and humidity is sent into the room as heating. Here, in the above-mentioned system, since the humidified air is taken into the inside of the device, the air conditioning may deviate from the appropriate temperature and humidity due to the load fluctuation of the fuel cell.
Then, the extracted air is introduced into the air inside the air conditioner to control the humidity. In the case of the exchange membrane humidification method,
The heating changes continuously depending on the passage area. According to the structure in which humidified air is extracted from the middle of the humidifier of the fuel cell, the air extracted from the appropriate part is not high-temperature, high-humidity air used in fuel cells, so it is used for air conditioning as it is This is possible and the simplest method. When the load fluctuation of the fuel cell is expected in this way, it is preferable to provide several outlets and perform control by switching.

In the air conditioning system of the present invention, when the outside air is replaced with the inside air in the room and the inside air is circulated,
Since a large amount of air sent into the fuel cell is taken in from the outside, the room air can be circulated by switching the outside air taken into the inside air side of the device to the inside air in order to control the room air. The inside air can also be circulated by sending inside air to the outside air side of the device and humidifying and heating the device.
In this air conditioning system, by using the blower of the fuel cell system, the cost can be reduced without using a special blower for air conditioning, and the entire system can be reduced in weight. Then, the fuel cell blower and the air conditioning system can be connected to perform cooling.

Further, the present invention is an air conditioning system including any one of the above air conditioners, wherein a catalytic combustion device is provided at an outlet of outside air from the air conditioner, and an oxygen sensor is provided at an outlet of inside air. The air-conditioning system is also provided. In the above air conditioner, most of the hydrogen reacts with oxygen on the opposite side of the membrane to produce water, but there is a possibility that the presence of hydrogen that cannot be reacted and jumps out as a gas may be confirmed. In such a case, by providing a catalytic combustion device at the outlet of the outside air, even if hydrogen gas of several percent or less may be generated due to the electroosmosis of water during dehumidification, water may be generated by the catalytic combustion device. Can be Further, in the above air conditioning system, since the electrolysis of water is involved, the oxygen concentration on the inside air side increases. When the inside air circulates in the room, the oxygen concentration keeps increasing unless there is an oxygen consuming source such as a person in the room. Therefore, by providing an oxygen sensor at the outlet of the inside air, it is preferable that the sensor performs concentration control such as forcibly ventilating some of the air so that the oxygen concentration does not increase too much. In addition, by providing a hollow fiber membrane used in a nitrogen gas generator at a part of the outlet of the inside air, it is also effective to separate oxygen and carbon dioxide and reduce the concentration of oxygen by controlling only the flow rate. Hereinafter, embodiments of the present invention will be described in detail.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In general, unless the enclosed space is cooled by evaporating water and the generated steam is not released to the outside, the humidity of the space increases and the discomfort index only increases. As a method of improving this point, a method of cooling the room temperature with an evaporative cooler and dehumidifying the evaporated water vapor by electrolysis and electroosmosis with a proton exchange membrane is effective. The apparatus of the present invention is an apparatus for performing an air conditioning method that combines cooling by water evaporation and electroosmotic dehumidification of a polymer membrane. FIG. 5 schematically shows the principle of the air conditioning method used in the present invention. In this air conditioning method, while entropy heat absorption (heat transfer) occurs in the proton exchange membrane of the present apparatus, cooling of room air is mainly performed by evaporation of water in a cooling unit. Therefore, the evaporated water vapor can be selectively discharged from the proton exchange membrane, which is a polymer membrane, to the outside of the room (outside air), and dried cooling air can be sent into the room. Here, the porous collectors 10 on both sides of the cation exchange membrane 11 are electrodes made of a material such as carbon paper. The hydrogen gas is exhausted as water by the combustion reaction of the catalyst 15. In such an air conditioning method, it is conceivable to use a polymer membrane having a large electroosmosis coefficient as the proton exchange membrane. In this case, however, the polymer membrane is easily dried and an overvoltage is increased. For this reason, in the apparatus of the present invention, it is possible to flow water for wetting the membrane through the proton exchange membrane, which is a polymer membrane, to reduce the overvoltage.
Hereinafter, embodiments of the present invention will be specifically described with reference to the accompanying drawings.

Embodiment (No. 1) FIG. 1 is a schematic diagram showing a dehumidifier having a cooling function according to the present invention, and FIG. 6 is a schematic diagram showing a dehumidifier using a proton exchange membrane. is there. The dehumidifier with a cooling function of the present invention (FIG. 1) is based on a structure in which the proton exchange membrane 5 is sandwiched by a plate 9 having a groove through which gas passes, similarly to the dehumidifier of FIG. The catalyst layer 4 exists. Outside the catalyst layer of the exchange membrane, there is a gas diffusion layer 3 which is a porous electrode made of carbon paper or carbon cloth or the like, and a plate 9 is present outside the gas diffusion layer 3. It is a basic structure of a dehumidifier.

A further feature of the air conditioner of the present invention shown in FIG. 1 is that a thin tube 1 (water distributor) through which water is formed in the plate 9 is provided. By directly wetting the exchange membrane 5 with the thin tube 1, it is possible to simultaneously perform the dehumidifying function and the cooling function.
The inside air taken in by a blower or the like is sent to the inside air passage 2 in the air conditioner. At the same time, outside air is sent into the outside air passage 6 which is a cooling unit. Water is supplied to the proton exchange membrane 5 from the thin tube 1 and keeps a wet state.

The cooling action can be explained as follows. First, when the outside air travels through the outside air passage 6, water on the surface of the proton exchange membrane 5 evaporates, and the introduced outside air itself is cooled by the latent heat of evaporation. Next, the cooled outside air deprives the device of heat, and the air conditioner itself is also cooled. Then, the inside air is cooled by heat exchange between the cooled device and the inside air. next,
The dehumidifying action can be explained as follows. First,
The proton exchange membrane 5 is charged by the electric charge applied to the air conditioner.
Of water is electrolyzed. Here, the protons generated by the decomposition move to the opposite side of the exchange membrane 5 according to the direction of the charge. At the same time, several moles of water molecules move with respect to one mole of protons due to electroosmosis. Next, in order to maintain the equilibrium state between the sent inside air and the humidity of the membrane, the moisture in the inside air moves to the proton exchange membrane 5, so that the inside air is dehumidified.

The supply of water is spontaneously supplied by capillary action that occurs when the proton exchange membrane 5 dries. With this method, the wet state of the exchange membrane can be kept constant without being affected by the water supply by electroosmosis. Further, when it becomes necessary to respond to a sudden load change or to force the supply of water when a large amount of air is required, the pressure on the supply water side is controlled to control the film moisture. I do. For example, in the system of FIG. 3 described later, the water tank 22 and the water pressure control device 21 outside the air conditioner main body 20 control the amount of water supplied to the membrane. At this time, the humidity of the gas on the inside air side and the gas on the outside air side are measured by the hygrometer 23 and transmitted to the pressure control device 21. On the other hand, in order to reduce the effect of fluctuations in the amount of evaporation due to changes in the external situation, when the response cannot be made due to the capillary phenomenon, it is necessary to control the supply of water at a pressure higher than the pressure of the inside air or outside air. The inside air side and the outside air side perform different controls due to the difference in their properties.

That is, on the inside air side, (i) When the humidity of the inside air is low, as the drying of the membrane proceeds, the electrical resistance increases due to the nature of the proton exchange membrane, and the function decreases. Because of this, increase the pressure to rehydrate. With this method, it was necessary to make the membrane thinner in order to determine the wet state of the membrane by the reverse diffusion due to the concentration gradient of water in the thickness direction of the membrane, but in this method, the mechanical strength of the membrane was reduced. Problems may occur.
For this purpose, the pressure difference on both sides of the membrane must be reduced, whereas the method of the present invention, which can make the membrane thicker, can apply a certain amount of pressure to the inside air and the outside air, so that dehumidification and cooling can be handled independently. it can. (ii) If the humidity of the inside air is high, reduce the water supply on the inside air side. (iii) Normally in the humidity range, due to oversupply, etc., monitor the humidity at the inside air outlet so that the dehumidifying effect does not deteriorate,
Perform feedback control.

On the outside air side, (i) by controlling the supply amount of water on the outside air side, it is possible to perform cooling control based on the flow rate of outside air and the evaporation amount of water. (ii) When flooding (a phenomenon in which the diffusion layer outside the membrane becomes flooded) occurs due to oversupply, it is considered that the reaction between protons and oxygen on the catalyst layer is inhibited, and the concentration of hydrogen gas increases. As a result, the concentration of protons in the membrane increases, preventing the electrolysis and electroosmosis of water. (iii) On the other hand, if the supply is small and the film is too dry due to evaporation, the conductivity on the cooling surface (outside air) side decreases, which may have an adverse effect on the dehumidifying function. Therefore, the optimum operation can be performed by monitoring the flow rate and the humidity change at the inlet and outlet of the outside air and performing feedback control.

FIG. 1B is a schematic perspective view of the air conditioner shown in FIG. 1A. If the pressure loss of the supply water becomes a problem by using the small tube 1 and the small hole, as shown in Fig. 2, a groove is dug on the opposite side to reduce the total length of the small tube. it can. In addition, carbon is often used for the plate 9 in consideration of electric conductivity. However, since carbon permeates a gas as it is, it is usually used by impregnating with a resin. By omitting this impregnation treatment, it is possible to make water permeate.

FIG. 3 shows an example of an air conditioning system using the air conditioner of the present invention. Protons generated by the electrolysis of water move to the opposite side of the membrane with an electroosmosis phenomenon, but most of the protons react with oxygen supplied from outside air at the opposite side catalyst layer to produce water. However, some protons cannot be completely reacted and are released as hydrogen gas. Although the ratio is estimated to be about 1%, it is preferable that this hydrogen gas is treated by placing the catalytic combustion device 24 outside. As a result, the product becomes water. As a modified example, in FIG. 3 (b), the catalyst can be carried on the passage side of the diffusion layer or on the whole, so that catalytic combustion can be substituted. here,
Hydrogen gas that has not been processed on the proton exchange membrane is trapped in the diffusion layer 3 and reacted. The diffusion layer passage surface catalyst layer 28 in FIG. 3B has a function of catalytic combustion, and traps generated hydrogen gas to generate water. According to this method, there is an advantage that even when the effective reaction area of the catalyst layer on the membrane is reduced by flooding, there is almost no effect.

The electrolysis of water that occurs when using the above air conditioner simultaneously generates oxygen. Oxygen is harmless as it is, but toxicity is caused when the concentration becomes high. Therefore, the control by the oxygen sensor 29 is effective, and the flow distribution control 25 is performed. If inside air is circulating, the oxygen concentration will continue to rise in the absence of oxygen sources such as humans. Since this apparatus is based on a large amount of electrolysis, it is considered that the amount of generated oxygen is also larger than that of a normal dehumidifier. If there is a source of oxygen consumption such as a person, the system can be operated continuously without ventilation, but if not, ventilation must be performed automatically.

That is, when operating the apparatus, a certain standard is set so that the oxygen does not exceed the respiratory range. When the standard is reached, a part of the room air is released, the outside air is introduced, and ventilation is performed. As a ventilation method, a method of forcibly ventilating a part of the inside air and a method of separating oxygen or carbon dioxide gas are considered. In the forced ventilation, a part of the inside air is sent to a ventilation duct and passed through the heat exchanger 26. Similarly, heat exchange is performed with the outside air sent by the blower 27, and the same amount of outside air is sent into the room, thereby suppressing a decrease in thermal efficiency. In the separation method, as in the case of the nitrogen generator, the oxygen (or carbon dioxide) is separated by passing through a hollow fiber membrane and using a difference in passage speed. The distribution of the amount of air sent to the separation device needs to be controlled according to the performance of the hollow fiber membrane.

Embodiment (Part 2) This embodiment is a system in which a fuel cell system and the above-described air conditioner of the present invention are combined, and the schematic configuration of the system is shown in FIG. Generally, in the system of the fuel cell 30, it is necessary to humidify the air, and the air conditioner 34 can be connected as an auxiliary device by using a part of the humid air. The humidifier 32 of the fuel cell usually has a function of increasing the temperature and humidity of the gas by bringing hot water and gas into contact with each other. At the outlet of the humidifier, the humidifier operates at the operating temperature of the fuel cell or higher. It is desirable to contain a saturated amount of water. This air is ideal as hot air with high humidity in dry conditions in winter.

In the air conditioning system of the present invention, the method of extracting heating air from the humidifier 32 is not particularly limited, but in the present embodiment, a method of extracting heating air from the humidifier through three systems. Is shown.
The system 1 is a method of extracting a part of the humid air from the outlet of the humidifier 32. This air contains approximately 60
This is sent to the air conditioner 34 with hot air of about 90 ° C. The humidity is reduced in the device 34, and the cooled air is sent into the room. The system 2 is a method in which air is taken out from the middle of the humidifier 32. The steam outlet pressure is not saturated, and the temperature is not increased to the operating temperature of the fuel cell. If it is an appropriate outlet, it can be treated as heated air as it is. Line 3
The adjustment is performed when the temperature and humidity of the taken-out air fluctuates due to a change in the load of the fuel cell or the auxiliary device, etc., at the take-out point set in the system 2. Apart from the case where the humidifier is shared, only the blower 33 can be shared. This makes it possible to omit the blower 33 as a single air conditioning system. In this case, the blower 33 is used for cooling, and is similar to the case of FIG.

[0024]

According to the present invention, it is possible to provide an air conditioner capable of dehumidifying a room by using the electroosmosis phenomenon of a proton exchange membrane and having a cooling function capable of controlling the temperature of the room. That is, in the air conditioner of the present invention, since the thin tube for water supply provided in the plate (interconnector) is formed into a thin hole, water is supplied by capillary action, and the proton exchange membrane can be kept in a wet state. it can. The proton exchange membrane is of a direct humidification type, which replenishes moisture directly to the membrane, so that the thickness of the membrane can be increased and the reliability with respect to mechanical strength is improved. Furthermore, the present invention does not use a medium such as chlorofluorocarbon, and is therefore an environmentally superior technology. In addition, since the cooling unit and the dehumidifying unit are integrated in the device of the present invention, dehumidification and cooling can be performed in one cell, and the device structure is simple. The cost can be made lower than when trying to obtain In the air conditioning system of the present invention, a part of the generated humid air is utilized by combining the humidifier of the fuel cell and the air conditioner, so that heating is possible. According to the structure for extracting humidified air from the humidifying device of the fuel cell, the air extracted from the appropriate portion is not high-temperature, high-humidity air used in the fuel cell, and can be used as it is, Air conditioning can be easily performed. Further, in the air conditioning system of the present invention, the outside air can be replaced with the inside air in the room, and the inside air can be circulated.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing an example of a dehumidifier with a cooling function of the present invention.

FIG. 2 is a schematic configuration diagram showing another example of the dehumidifier with a cooling function of the present invention.

FIG. 3 is an example of an air conditioning system using the air conditioner of the present invention.

FIG. 4 is a configuration diagram showing an example of a system in which a fuel cell system and an air conditioner are combined.

FIG. 5 is a diagram showing the principle of the air conditioning method used in the present invention.

FIG. 6 is a configuration diagram schematically showing a dehumidifier using a proton exchange membrane.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 thin tube (water distributor) 2 inside air passage 3 gas diffusion layer 4 catalyst layer 5 proton exchange membrane 6 outside air passage 7 water passage 8 water supply pipe 9 plate 10 porous collector electrode 11 cation exchange membrane 12 wet rotating belt 13 blower 14 power 15 Catalyst 17 Lid 20 Air conditioner body 21 Water pressure control device 22 Water tank 23 Hygrometer 24 Catalytic combustion device 25 Flow distribution control device 26 Heat exchanger 27 Blower 28 Diffusion layer passage catalyst layer 29 Oxygen sensor 30 Fuel cell 31 Motor controller 32 Humidifier 33 Blower 34 Air conditioner body

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI theme coat ゛ (reference) H01M 8/00 H01M 8/00 Z 8/04 8/04 JK F term (reference) 3L053 BC05 BC06 3L055 AA10 BA01 BB01 4D006 GA28 JA26Z JA42Z KA15 KA22 KB01 KB30 MA12 MB07 MC09 PB17 PB65 PC72 4D052 AA08 BA01 BA03 BB01 EA01 EA05 5H027 AA06 DD00

Claims (7)

[Claims] 1. A proton exchange membrane is sandwiched between an outside air side plate and an inside air side plate having gas passages,
An air conditioner provided with a gas diffusion layer and a catalyst layer, which are porous electrodes, respectively, between the proton exchange membrane and each plate, wherein the proton exchange membrane is provided on the outside air side plate and the inside air side plate. An air conditioner comprising a thin tube for supplying water to be moistened, wherein the proton exchange membrane is directly humidified by moisture. 2. The air conditioner according to claim 1, wherein the cooling unit and the dehumidifying unit are integrated. 3. The air conditioner according to claim 1, wherein the outside air side plate portion and the inside air side plate portion are connected to load an electric charge on the entire device. 4. A system in which a humidifier for a fuel cell and the air conditioner according to claim 1 are combined,
An air conditioning system characterized in that a part of the humid air generated from the humidifier is drawn out from a stage after the humidifier or in the middle of the humidifier and used for air conditioning. 5. The air conditioning system according to claim 4, wherein a part of the humid air generated by said humidifier is introduced into a gas passage of an inside air side plate of said air conditioner. 6. The air conditioner according to claim 4, wherein in the air conditioner, the outside air taken into the gas passage of the outside air side plate having the gas passage is replaced with the inside air in the room to perform the inside air circulation. system. 7. An air conditioning system including the air conditioner according to claim 1, wherein a catalyst combustion device is provided at an outlet of the outside air from the air conditioner, and an oxygen outlet is provided at an outlet of the inside air. An air conditioning system comprising a sensor.