JP2019015488A - Air circulation heater under ceiling - Google Patents

Abstract

To provide a simple method for preventing mold occurring at a ceiling part of a room.SOLUTION: Air-conditioning is performed so as to change temperature between an upper space and a lower space where people come and go, in a room, and thus a temperature near a ceiling is made high to make temperature-humidity environment where mold is hard to occur. Specifically, an air blower 4 and a heat exchanger 3 are attached into an air channel 2; air existing within a range of 1 m under a target ceiling surface where an air state is adjusted is held between an opening part 1 of the air channel provided on an air suction side of the air blower and an opening part 9 of the air channel provided on an air blowout side of the air blower; and the opening part 9 on the air blowout side is opened toward the opening part 1 on the air suction side.SELECTED DRAWING: Figure 1

Description

    The present invention relates to an apparatus that prevents mold from occurring on the ceiling of a room.

In stores such as supermarkets, the low-temperature preservation of foods using refrigerated showcases has increased, and the surrounding walls and ceilings have been cooled by the leaking cold air, causing condensation and mold. In Japan, it became prominent in the summer when the absolute humidity of the outside air was high, and there were many problems that the ceiling became black due to mold.
In the vicinity of stores where refrigerated showcases are concentrated, there is a problem that the cooling load is small and the number of installed air conditioners is small, and the cooling operation cannot be performed due to low temperature, or the dehumidification is not performed because the operation time is short. .

In a store where a refrigerated showcase is frequently used, the temperature around the refrigerated showcase is lowered and the temperature is lower than in other places in the store, so that the relative humidity in the vicinity increases.
When air at different temperatures is mixed, the relative humidity is always high.
Even at low temperatures, air with high relative humidity will lighten the specific gravity and create an updraft that will cool the ceiling.
Various solutions have been proposed for such problems.

    In stores such as supermarkets, large propeller fans called ceiling fans have been installed for the purpose of preventing mold on the ceiling and eliminating the temperature difference between the top and bottom of the room. This is to increase the flow velocity of the air near the ceiling, thereby reducing the temperature difference between the air and the ceiling surface to prevent the formation of condensation and mold.

    There was also a ceiling fan (8 in FIG. 3) that blows air sideways. The wind in the direction along the ceiling lower surface 6 was blown directly to increase the air flow velocity on the surface to reduce the temperature difference between the air and the ceiling surface 6 to prevent the formation of condensation and mold.

In the freezing and refrigerated showcases, cold air was constantly flowing out, creating a pool of cold air near the floor of the store, and the feet of the passersby were cooled, giving an unpleasant feeling.
In addition, the infrared radiation from the cooled floor surface is reduced, which causes the lower surface of the ceiling to cool.

    In such a case, from the compressor discharge side of the refrigerator for a refrigerated showcase, draw a pipe through which high-temperature refrigerant gas passes into the store, pass it through the heat exchanger, exchange heat with the store air, and dry the air at a high temperature As the temperature inside the store using a method called heat reclaim, which blows out toward the floor, sucks low temperature air from near the floor and exchanges heat, and blows it out toward the top of the store as hot air We have taken measures against humidity.

    In summer shops, direct outside air intrusion causes an increase in humidity. Humidity rises when hot outside air mixes with cold store air, and further spreads along the ceiling, so moisture is sent to the back of the store, causing condensation on the cold ceiling surface . Of course, it causes mold.

    In order to prevent outside air from entering the store, a windbreak room with double entrance doors is provided, but the front and rear doors often open at the same time, which is not a sufficient measure.

    Although there is a method to prevent the outside air that has entered the store from blowing down on the air curtain installed at the doorway and mixing it to prevent it from spreading to the ceiling surface, it is not possible to eliminate the outside air. Even in mixed air, if it is hot and humid, it rises and spreads on the ceiling.

In many cases, the store air is in a negative pressure where the air pressure in the store is lower than that in the outside air due to imbalance between the intake and exhaust of the store or room.
When the store air is under negative pressure, outside air comes in directly from various places.
In order to secure the necessary ventilation and eliminate the negative pressure, the air supply must be increased.

In stores, ventilation is required to ensure combustion air and human expiration, and a ventilator that balances supply and exhaust is required. If you ’re in a place where direct outside air is being supplied,
You will end up suffering in a cold or hot environment. Various methods have been devised for the place and method of supplying air.

    In order to solve both air supply and ventilation at the same time, there is a method of supplying air after adjusting the outside air through an air conditioner. This method supplies outside air that is too hot or too cold at the temperature and humidity necessary to maintain the store environment. Moreover, the atmospheric pressure in the store can be maintained at a positive pressure.

In many cases, mold grows at night when the store is closed. The method of supplying the air after passing outside air through the air conditioner needs to be operated for 24 hours.
Compared to adjusting the temperature and humidity environment by recirculating the cooled air, ordinary air conditioners always operate with a large heat load because the outside air is cooled and heated.
In times when there is a large difference between the temperature and humidity of the outside in summer and the temperature in the store, there are cases where 1.4 times the power is used.

    Although it is effective to reduce the humidity in the store using a large dehumidifier, electrical work must be done separately, and wasteful power is consumed in hot summer.

Countermeasures for temperature and humidity by air conditioners are implemented in the store or the entire room.
Therefore, it becomes insufficient as a measure against the ceiling near the freezer / refrigerated showcase, which is prone to mold. This is because both people and molds grow in a similar environment.

    There is a method to make molds difficult to attach by creating a surface with no irregularities by painting with anti-mold paint. The effect may last for several years, but under in-store conditions where condensation forms on the ceiling, dust adheres and then dries, causing mold to stick to the dirt. Since dust drifting in the air becomes a nutrient source, it is necessary to prevent the vicinity of the ceiling 6 from becoming a high relative humidity.

    Because the ceiling lighting has changed from fluorescent lamps to high frequency lamps and to LED lighting, the surface temperature of the lower surface of the ceiling is lowered along with a significant drop in the ceiling lighting power, which further promotes the generation of mold. It was.

    The conventional ceiling fan 8 or transfer fan 8 does not provide sufficient countermeasures against the lowering of the surface temperature and the increase of relative humidity on the lower surface of the ceiling, but only stirs air in a high relative humidity, generating mold. The situation that cannot be suppressed occurs.

The measures described above for the cold air leaking from the conventional air conditioner (Fig. 2) and the refrigerated showcase are not concentrated on the mold 6 on the ceiling. The goal was to improve.
For this reason, the influence affects the entire room 7 and is not good for mold, and often does not result in a temperature and humidity environment in which mold is difficult to live. Especially at night, air conditioning is often stopped, so an environment with high relative humidity occurs. The solution to the problem was to separate the environment where people live and measures against mold.
The present invention avoids the influence on the human living space 7 and changes only the air state of the ceiling lower surface 6 of the room to a high temperature. This air conditioner aims to divide the environment of the space 6 under the ceiling and suppress the occurrence of mold on the ceiling.

In a conventional air conditioner or air conditioner, the blown-out air that has been conditioned is not directed to the air inlet of the same device. It is a structure that should not be said to be a short circuit, so that the air outlet is directed toward the suction port, and even if there is something wrong, the basic structure is an air current short circuit. There was no air conditioner.
The present invention has been accomplished by a new idea that breaks the common sense of air conditioners and effectively uses a short circuit of airflow, unlike conventional ceiling mold countermeasures.

The present invention will be described with reference to FIG. The place where mold occurs on the ceiling in a store such as a supermarket can be predicted. A place where the installation density of the refrigerated showcases 13 is high in a place where the temperature is low in the store, and the ceiling 6 at the top of the flat showcase 13 which is open at the top, particularly the freezer showcase 13, It becomes colder than other places and black mold occurs.
A device that circulates air through the ceiling portion 6 that needs such countermeasures and short-circuits the airflow to reheat is installed. The heated airflow accumulates in the upper part of the room and does not mix with the air in the living space 7 below.

    If this invention is demonstrated along FIG. 4, the air blower 4 and the heat exchanger 3 will be attached in the wind tunnel 2 installed on the ceiling, and the opening opened in the space under the ceiling of the wind tunnel in the air suction side of the air blower. The structure of sandwiching the air within 1 m below the ceiling surface 6 to be adjusted with the opening portion 9 opened in the space under the ceiling of the wind tunnel on the air blowing side of the blower, This is an air circulation device in which the opening 9 on the blowing side is opened in the direction of the opening 1 on the air suction side.

    Since various instruments are attached to the ceiling, a temperature controller is provided so as not to exceed 40 ° C., and the gas flow on the compressor discharge side is controlled.

    An air conditioner called a ceiling-embedded air conditioner adjusts the temperature and humidity of the entire room, creating a comfortable space that is free of temperature unevenness as a living environment for people. You have to use wasted power.

The heating of the air according to the present invention does not affect the living space 7 of the person, and the occurrence of mold on the top portion 6 heated in a concentrated manner can be suppressed. No extra power is required by using the discharge gas heat of the refrigerator.
Unlike normal air conditioners, it continues to overheat only the ceiling without using wasted power at night.

  Overall view of equipment showing an embodiment of the present invention   Conventional ceiling-mounted air conditioner diagram   Ceiling fan installation diagram as a form of conventional measures against ceiling mold   Main equipment diagram of the present invention

Claims (2)

    A ceiling that requires measures to adjust the surface air condition by installing a blower and heat exchanger in the wind tunnel, and opening the wind tunnel on the air suction side of the blower and the opening of the wind tunnel on the air blowing side of the blower An air circulation device that has a structure that sandwiches air within 1 m below the part, and that opens toward the direction of the air suction side opening on the air blowing side     The air circulation device according to claim 1, wherein the air blowing side opening has a honeycomb structure.

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