JP2009052753A - Ventilation fan - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a ventilation fan with high energy efficiency free from energy loss during ventilation. <P>SOLUTION: To solve the above problem, this invention comprises a honeycomb rotor 1 supporting acidic gas absorber for carbon dioxide, etc., or alkaline gas absorber and VOC absorber, as required. The honeycomb rotor 1 is divided at least in an absorption zone 4 and a desorption zone 2. Indoor air is made to pass through the absorption zone 4, the air passing through the absorption zone 4 is returned to a room inside again, and the air passing through the desorption zone 2 is emitted to the outside air, which can emit the carbon dioxide and other harmful gases in the room air to the outside. Accordingly, the interior carbon dioxide can be removed by a small amount of ventilation. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention uses, for example, an acidic gas absorbent such as potassium carbonate or an acidic gas adsorbent such as a weak basic ion exchange resin, and removes carbon dioxide and acidic gas to improve the quality of indoor air, particularly by slight ventilation. A ventilation fan that can be raised is provided.

  Ventilation fans used in people's living spaces are mainly used for the purpose of discharging carbon dioxide, organic solvent vapor (hereinafter referred to as “VOC”), etc. contained in human breath. When ventilation is performed during cooling and heating, the heating and cooling load increases, so a total heat exchanger is used in the ventilation pipe.

  As such total heat exchangers, a rotor type and a stationary type are mainly used. A rotor type has a total heat exchange efficiency of about 70%, and a small static type has a total heat exchange efficiency of 50%. Degree. In other words, 30 to 50% of energy is wasted even if energy that is discarded by total heat exchange is recovered.

Furthermore, recent houses have air conditioning facilities that are independent of each room, and a ventilation fan is provided for each room, and ventilation is performed through a duct that passes from each ventilation fan to the ceiling. Such a duct may be a long pipe line, and in such a case, air resistance is large. Therefore, the energy required for ventilation also increased, which was also wasted energy due to ventilation, and overall energy efficiency was reduced.
JP 2005-98571 A JP 2007-37670 A

  In response to the above problem, as shown in Patent Document 1, a ventilation fan that is operated when the indoor carbon dioxide concentration reaches a certain value or more has been developed. However, this still did not sufficiently reduce the energy loss associated with ventilation.

  For this reason, as shown in Patent Document 2, a deodorization apparatus having a filter that adsorbs or decomposes harmful gases in the air has been developed. However, such a device has a problem in that it requires additional operation costs because the filter must be replaced.

  An object of the present invention is to provide a ventilating fan that can purify indoor air while reducing energy loss while performing ventilation and has low operating costs.

  In order to solve the above-described problems, the present invention has a honeycomb rotor carrying an acidic gas adsorbent such as carbon dioxide or an absorbent, and the honeycomb rotor is divided into at least an adsorption zone and a desorption zone, The air was circulated to release the air that passed through the desorption zone.

  Since the ventilation fan of the present invention is configured as described above, carbon dioxide generated by a person in the room, and SOx, NOx, such as SOx and NOx generated by a stove or entering from outside air, are also adsorbed to the honeycomb rotor at the same time. It is desorbed and released to the outside air. Here, since the indoor air is not ventilated with the outside air, the oxygen in the indoor air gradually decreases, but the oxygen concentration in the air is about 20%, and a slight decrease has no influence on human breathing.

On the other hand, the concentration of carbon dioxide is said to be 0.1% in the Building Standards Act (0.5% allowed by the National Institute of Occupational Safety and Health and the US Occupational Health Experts Council), Therefore, ventilation of 30m ³ / H per person in the room is required to increase human health. Therefore, if only carbon dioxide can be discharged from the room, the indoor environment can be maintained without ventilation of 30 m 3 / H.

  Furthermore, since the ventilation fan of the present invention uses a honeycomb rotor having carbon dioxide and acid gas absorption / desorption action, there is no member to be replaced like an object using a filter, and the operating cost can be reduced.

  In particular, in recent years, photochemical smog has been generated one after another in urban areas, and in such a case, there is a concern that photochemical smog may enter the room by ventilation. In addition, automobile exhaust gas along the main road and odor from cooking exhaust in the downtown area may enter the room due to ventilation. However, the ventilation fan of the present invention does not have such a problem because the ventilation amount is small.

  The invention according to claim 1 of the present invention has a honeycomb rotor having a function of adsorbing or absorbing acidic gas such as carbon dioxide, dividing the honeycomb rotor into at least an adsorption zone and a desorption zone, and passing indoor air through the adsorption zone. Since the air that has passed through the adsorption zone is returned to the room again, and the air that has passed through the desorption zone is released to the outside air, acid gases such as carbon dioxide and SOx, NOx in the room air can be released to the outside. It has the action.

  Furthermore, since the ventilation air volume can be reduced by concentrating, desorbing and exhausting acidic gas such as carbon dioxide gas, the energy consumption is saved without losing the cooling and heating energy due to the large air volume ventilation. Even if the total heat exchanger is used for ventilation, 30 to 50% of energy is lost due to ventilation. For example, if the indoor carbon dioxide gas can be concentrated 10 times or more and exhausted and ventilated, the total heat exchanger The energy saving effect is expected to exceed.

  Embodiments of the ventilation fan of the present invention will be described in detail below with reference to the drawings. 1 is a honeycomb rotor, which is a corrugated (corrugated) processed non-combustible sheet such as ceramic fiber paper. For example, an inorganic adsorbent such as zeolite adsorbing carbon dioxide, hydrotalcite, etc. An inorganic absorbent such as potassium carbonate (potassium bicarbonate) or sodium carbonate (sodium bicarbonate), an organic absorbent such as triethanolamine or monoethanolamine, or a weakly basic ion exchange resin is supported.

  In the case of a weakly basic ion exchange resin, itself can be made into a sheet, and in this case, a honeycomb rotor can be made from the sheet-like ion exchange resin.

  Further, when a weak basic ion exchange resin and a weak acid ion exchange resin are mixed and supported on the honeycomb rotor, an acidic gas such as carbon dioxide and an alkaline gas such as ammonia can be removed. Furthermore, VOC and odor can be simultaneously removed by mixing VOC adsorbents such as activated carbon, hydrophobic zeolite, and synthetic adsorbents HP20 and SP207 manufactured by Mitsubishi Chemical. Alternatively, the rotor can be manufactured separately without mixing the adsorbent, and can be made by superimposing them together.

  The honeycomb rotor 1 is divided into a desorption zone 2, a purge zone 3, and an adsorption zone 4. Room air is supplied to the purge zone 3 and the adsorption zone 4 by a blower or the like (not shown because it is general).

  The air that has passed through the purge zone 3 is heated by the heater 5, passes through the desorption zone 2, and is released to the outside air. The air that has passed through the adsorption zone 4 is returned again into the room 6. The outside air introduction port 7 sends outside air into the room as it is, and is used when a minimum amount of outside air is necessary so that the amount of oxygen is not insufficient and the outside air is clean.

  The ventilation fan of this invention is comprised as mentioned above, and the operation | movement is demonstrated below. If there is a person in the room and there is a possibility that the carbon dioxide concentration in the room may increase due to the carbon dioxide in the breath, or if the open carbon stove is used indoors in the winter, the carbon dioxide concentration in the room due to the carbon dioxide in the exhaust It is necessary to ventilate room air, such as when there is a possibility of rising.

  In such a case, the indoor air is passed through the adsorption zone 4 and the purge zone 3 while rotating the honeycomb rotor 1. The air that has passed through the adsorption zone 4 is returned to the room again after removing acidic gases such as carbon dioxide, SOx, and NOx.

  At the same time, the heater 5 is energized, and the heated air passes through the desorption zone 2 and desorbs carbon dioxide, SOx, NOx and other acidic gases adsorbed and is released to the outside air. In this way, carbon dioxide, SOx, NOx and other acidic gases in the indoor air are released to the outside of the room.

  A person in the room consumes oxygen in the room air. However, oxygen is about 20% in the atmosphere, and a small amount of consumption does not cause a problem. Further, the discharge of air containing a large amount of carbon dioxide that has passed through the desorption zone 2 results in a negative pressure in the room, and outside air enters from the windows and doors as gap air, or oxygen is supplied by diffusion due to a concentration difference. In other words, an amount of outside air substantially equal to the amount of air discharged from the desorption zone 2 to the outside is supplied as a gap air, and there is almost 20% of oxygen in the air, so there is no shortage of oxygen.

  The amount of air exhausted from the desorption zone 2 is small compared to the amount of air passing through the adsorption zone 4. Therefore, when the air that has passed through the desorption zone 2 is discharged to the outside through a duct, the energy required for this exhaust is reduced. Less is enough. Moreover, since the diameter of a duct may be small, the installation work of a duct is easy and the installation cost of a duct is low.

  In large office buildings with centralized ventilation and air conditioning systems, the ventilation ducts are also large, and the building must be designed with the duct space in mind, but if the ventilation fan of the present invention is used, the ventilation design is small. Therefore, the cost of the building itself can be reduced.

  Some residential air conditioners have a ventilation function, but the ventilation duct is passed through a construction hole for passing refrigerant piping for the outdoor unit of the air conditioner. Although it was not desired, the ventilator of the present invention can concentrate and exhaust the carbon dioxide gas, so that effective ventilation operation is possible even with a small air volume.

  And since the exhaust of the ventilation fan of the present invention has a high carbon dioxide concentration, if the exhaust is led to a plant growth room such as a greenhouse, the growth of the plant is accelerated and the release of carbon dioxide to the environment can be suppressed. .

  Thus, in order to exhaust only a few to several hundred ppm of pollutants in the room, waste of energy can be reduced as compared with exhausting a large amount of air to the outside of the room. Further, if a carbon dioxide sensor is provided so as to operate only when the carbon dioxide concentration exceeds a predetermined value, energy waste can be further prevented.

  In particular, ammonia has a low human perception range, and many people feel uncomfortable at a concentration of only a few ppm. In such a case, a lot of air is exchanged to discharge a small amount of material, which is a waste of energy. However, in the present invention, only such an odorous material is discharged, so that a waste of energy is generated. Less is.

  As described above, carbon dioxide and VOC in the room are discharged with a small amount of ventilation, and loss of energy accompanying ventilation can be prevented. Also, even if the outside air contains pollutants, there is no problem because the amount of ventilation is small.

  If the indoor carbon dioxide concentration increases extremely, such as when there are many people using an open stove indoors, the outside air is temporarily taken in.

  The present invention provides a ventilation fan that can release indoor carbon dioxide to the outside without performing ventilation, and thus can provide a ventilation fan that can prevent energy loss associated with ventilation.

It is a systematic diagram which shows Example 1 of the ventilation fan of this invention.

Explanation of symbols

1 Honeycomb rotor 2 Desorption zone 3 Purge zone 4 Adsorption zone 5 Heater 6 Room 7 Outside air inlet

Claims (5)

A honeycomb rotor having a function of adsorbing or absorbing acidic gas such as carbon dioxide, dividing the honeycomb rotor into at least an adsorption zone and a desorption zone, passing indoor air through the adsorption zone, and passing the air that has passed through the adsorption zone A ventilating fan which is returned to the room again and discharges air that has passed through the desorption zone. A honeycomb rotor having an adsorption or absorption function of an acidic gas such as carbon dioxide and an adsorption or absorption function of an alkaline gas and an adsorption function of an organic solvent vapor, and the honeycomb rotor is divided into at least an adsorption zone and a desorption zone; Through the adsorption zone, the air that has passed through the adsorption zone is returned to the room again, and the air that has passed through the desorption zone is discharged to the outside. The ventilation fan according to claim 2, comprising a rotor in which a honeycomb rotor having an adsorption or absorption function of acidic gas such as carbon dioxide, a honeycomb rotor having an adsorption or absorption function of alkaline gas, and a rotor having an organic solvent vapor adsorption function are combined. 2. When ventilation is performed, if the outside air is not clean, the outside air is passed through the adsorption zone together with the room air, and if the outside air is clean, the outside air is directly supplied to the room. Ventilation fan. A purge zone is provided in the honeycomb rotor, indoor air is passed through the purge zone, air that has passed through the purge zone is heated and passed through the desorption zone, and air that has passed through the desorption zone is discharged to the outside of the room. 1 ventilation fan.

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