JPS6325449A - Method and device for preventing condensation in blow-off port - Google Patents

Abstract

PURPOSE:To prevent the dropping of water drips from a blow-off port, by a method wherein a face frame is provided with a heating means such as an electric heater or the like and a method and a device for putting an electric source of the heating means ON, OFF in accordance with the increase or reduction of the temperature of the face frame are provided. CONSTITUTION:When atmosphere A flows into a cooled room 1 through an opening 1b by the entrance or exit of a man or the like and, further, the surface temperature of a face frame 3a is reduced to the dew point of indoor air near the frame 3a which is disturbed by the outer air A, water drips 9 are formed on the insulating part of the frame 3a. However, the dew point temperature of the indoor air near the frame 3a is inputted into a temperature difference regulator 6 at all times by a dew point temperature detector 7, while the temperature of conditioned air is inputted also into the regulator 6 by a temperature detector 8 provided in a duct 2, therefore, the regulator 6 compares these two temperature signals at all times. When the conditioned air temperature has arrived at the dew point temperature, the electric source of an electric heater 4 is put ON through a transformer 5 to heat the frame 3a and increase the temperature of the same, whereby the generation of the condensation of water on the frame 3a may be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method and apparatus for preventing dew condensation at an outlet for preventing water droplets from forming at an outlet for conditioned air.

[Conventional technology]

BACKGROUND ART In order to blow out conditioned air indoors, outlets are provided on ceilings, walls, etc., and many ceiling outlets are usually installed with a face frame, such as an anemo-shaped outlet. In addition to general buildings, these air outlets are also installed in railway station buildings, airport terminal buildings, department stores, etc. Because these buildings have a lot of people going in and out, air conditioning outlets near the entrances are often installed. Condensation occurs on the face frame of the outlet due to the influence of outside air being blown in, and there are many problems in which water droplets fall on people, products, or computer ticket sales terminals.

Therefore, in order to prevent such condensation, the blowing airflow of conditioned air is made uniform to prevent outside air from being drawn in, and dew condensation prevention tape is attached to the surface of the face frame.

[Problem that the invention seeks to solve]

However, with such conventional countermeasures, for example, even if the blowout airflow is made uniform, it cannot counteract disturbances caused by intruding outside air and condensation occurs, and the application of anti-condensation tape also makes it difficult to ensure that the insulation material is sufficiently thick. Therefore, when used for a long period of time, the face frame is cooled by the conditioned air and reaches the dew point relative to the incoming outside air, resulting in condensation.

This invention has been made in view of the above-mentioned problems of the conventional technology.The face frame is provided with a heating means such as an electric heater, and the power of the heating means is turned on in accordance with the rise in the temperature of the face frame. The object of the present invention is to solve the above-mentioned problems by providing a method for turning off the power and a device therefor.

[Means for Solving the Problems] The present invention provides a heating means on the face frame of a conditioned air outlet, and controls the dew point temperature of indoor air near the outlet and supplies conditioned air to the outlet. The temperature of the conditioned air in the duct is measured, and when the measured temperature of the conditioned air reaches the dew point temperature, the heating means is turned on, and when the dew point temperature is not reached, the heating means is turned off. As an invention of a dew condensation prevention method for always keeping the temperature of the face frame above the dew point temperature by doing so, and a device used in carrying out this method, a heating means provided on the face frame of a conditioned air outlet, a dew point temperature detector that detects the dew point temperature of indoor air near the outlet; a temperature sensor that detects the temperature of conditioned air in a duct that supplies conditioned air to the outlet; and a conditioned air corresponding to the detected dew point temperature. The dew condensation prevention device is equipped with a temperature difference regulator that turns on and off the power of the heating means provided on the face frame depending on the temperature difference.

[Effect]

A dew point temperature sensor detects the dew point temperature of the air by detecting the temperature and humidity of the air, and the dew point temperature on the indoor side near the conditioned air outlet is detected.Meanwhile, the temperature sensor detects the conditioned air at the outlet. Detects the temperature of conditioned air in the supply duct. These detected temperature values are then input to the temperature difference controller and compared. As a result, when the conditioned air temperature approaches or reaches the dew point temperature, the heating provided in the face frame is activated by the temperature difference controller. The power supply of the means is O
N, the face frame is heated, and when the face frame temperature rises above the dew point temperature due to heating, no dew condensation occurs on the face frame. Moreover, as a result of the comparison, since no dew condensation occurs on the face frame while the temperature of the conditioned air has not reached the dew point temperature, the power to the heating means is maintained in the OFF state by the temperature difference regulator.

〔Example〕

The present invention will be explained below based on the drawings. 1 to 3 are diagrams showing an embodiment of the present invention.

In the figure, 1 indicates an indoor room of a building, and 2 is a duct provided in the ceiling la for supplying conditioned air to this room. Reference numeral 3 denotes a conditioned air outlet, which is of an anemo type in this embodiment.

Reference numeral 3a denotes a face frame of this air outlet, and 4 an electric heater (in this embodiment, a surface heating type) as a heating means attached to this face frame, which is connected to a temperature difference regulator 6 via a transformer 5 and is controlled. be done. 7 is a dew point temperature detector attached to the ceiling 1a near the air outlet 3, which detects the temperature and humidity of the indoor air near the air outlet 3, detects the dew point temperature based on the detected value, and detects the detected value. 8 is a temperature sensor attached to the duct 2, which detects the temperature of the conditioned air in the duct 2 and sends the detected value to the temperature difference controller 6. It has become.

FIG. 3 is a broken perspective view showing details of the electric heater 4 as a heating means, which is called a surface heating type. 4a is a conductive wire, and 4b is a self-regulating resistor which is a heating element and forms a parallel circuit heater, which has the property of always keeping the amount of heat generated per unit length constant. 4C is a covering body that covers and insulates the heating element 4b. The electric heater 4 is attached along the periphery of the face frame 3a as shown in FIG. 2, and is connected to a power source via a transformer 5.

Now, when outside air A is blown into the air-conditioned room 1 through the opening 1b due to people coming in and out, etc., the temperature on the surface of the face frame 3a, that is, the temperature of the conditioned air blown out from the face frame 3a, is disturbed by the outside air A. When the dew point temperature of the indoor air near the face frame 3a is lowered, water vapor in the air condenses to form water droplets 9 at the edge of the face frame 3a. However, at this time, face frame 3a
The dew point temperature of the indoor air in the vicinity is constantly inputted to the temperature difference regulator 6 by the dew point temperature detector 7, while the temperature of the conditioned air is similarly inputted to the temperature difference controller 6 by the temperature detector 8 provided in the duct 2. Since the temperature signal is input to the regulator 6, the temperature difference regulator 6 constantly compares these two temperature signals, and if the conditioned air temperature reaches the dew point temperature, it switches on the power to the electric heater 4 via the transformer 5. When turned ON, the face frame 3a is heated and the temperature is increased to prevent condensation from forming on the face frame 3a.Also, if the conditioned air temperature has not reached the dew point temperature, condensation will not occur, so the electric heater 4 is turned off. It is kept in the OFF state.

With the above configuration, the face frame 3a can be used only when necessary.
It is heated by an electric heater 4 to constantly prevent dew condensation.

Figures 4 to 6 show other types of conditioned air outlets; Figure 4 is a nozzle type outlet, Figure 5 is a VH3 type blowout outlet; 6 Figure is a breeze line type outlet; In each case, the electric heater 4 used in the previous embodiment is attached along the periphery of the end portion, and the same temperature control device as in the previous embodiment is provided.

〔Effect of the invention〕

As described above, according to the present invention, water droplets are prevented from falling from the air outlets located near the population of a department store or store, and products etc. can be laid out freely. In addition, the unhygienic problem caused by condensation in restaurants and the like with high humidity can be solved. In addition, various effects can be obtained in places where moisture is averse, such as computer rooms and electrical equipment rooms.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram of an embodiment according to the present invention, Fig. 2 is a partially enlarged view of Fig. 1, Fig. 3 is a cutaway perspective view showing the configuration of an electric heater serving as a heating means, Figs. , 6 illustrate various types of conditioned air outlets. 1...Room, 2...Duct, 3...
...Air outlet, 3a...Face frame, 4...
...Heating means (electric heater). 6... Temperature difference controller, 7... Dew point temperature detector, 8... Temperature detector. Patent Applicant Taisei Corporation Representative Patent Attorney Tetsuya Mori Patent Attorney Yoshiaki Naito Representative Patent Attorney Tadashi Shimizu

Claims (2)

[Claims] (1) A heating means is provided on the face frame of the conditioned air outlet, and the dew point temperature of the indoor air near this outlet and the temperature of the conditioned air in the duct that supplies conditioned air to the outlet are measured. , when the measured temperature of the conditioned air approaches or reaches the dew point temperature, the heating means is turned on;
When the dew point temperature is not reached, turn off the power to the heating means.
A method for preventing dew condensation at an air outlet, characterized in that the temperature of the face frame is always kept above the dew point temperature by setting F. (2) A heating means provided on the face frame of the conditioned air outlet, a dew point temperature detector that detects the dew point temperature of the indoor air near the outlet, and a dew point temperature detector installed in the duct that supplies conditioned air to the outlet. A temperature detector that detects the temperature of the conditioned air and a temperature difference between the conditioned air temperature and the detected dew point temperature are used to turn on and off the power to the heating means provided on the face frame.
1. A dew condensation prevention device for an air outlet, characterized in that it is equipped with a temperature difference regulator that adjusts temperature.