JP2018087671A - Coanda airflow air conditioning system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a Coanda airflow air conditioning system capable of quickly adjusting the temperature and humidity of a whole air-conditioning target room while avoiding variations in the room temperature and the room humidity in the air-conditioning target room. A Coanda airflow air-conditioning system for air-conditioning air A blown from an air-conditioning apparatus 1 by adhering to a ceiling surface 3 of an air-conditioning target room 2 by a Coanda effect so as to flow the air-conditioned air. In a state in which the control device 5 that is configured to be capable of adjusting the blowing air amount of A and automatically controls the operation of the air conditioner 1 maintains a constant separation distance L for separating the conditioned air A from the air conditioner 1 from the ceiling surface 3. The air volume of the conditioned air A from the air conditioner 1 is adjusted. [Selection diagram] Figure 1

Description

  TECHNICAL FIELD The present invention relates to a Coanda airflow air conditioning system that air-conditions air-conditioning air that is blown out from an air-conditioning apparatus due to the Coanda effect while flowing on the ceiling surface of an air-conditioning target room.

The fluid has a characteristic of flowing while adhering to a smooth surface (Coanda effect), and in the Coanda airflow air conditioning system using such a Coanda effect, the conditioned air from the air conditioner separates from the ceiling surface of the air conditioning target room. The air conditioning is performed while flowing the conditioned air along the ceiling surface until the separation distance is reached, and is conventionally known.
In this Coanda airflow air-conditioning system, the entire air-conditioned room is scanned sequentially from one end to the other with an infrared sensor, and when a change in heat load is detected in a specific area, that is, when cooling is taken as an example, When a high indoor temperature is detected in a region, it is known that air conditioning is performed by actively sending cold air to the high indoor temperature region by adjusting the above-described separation distance (see, for example, Patent Document 1).

Japanese Patent Laid-Open No. 6-101892

  However, in the prior art described in the above-mentioned patent document, the reach distance of conditioned air is adjusted only when a high indoor temperature region occurs during cooling, and the reach distance depends on the air conditioning load of the entire air conditioned room. It is not adjusted. For example, if the air-conditioning load of the entire air-conditioned room during cooling is reduced and the blown air volume of the air-conditioned air from the air conditioner is reduced, the blown air volume decreases until the thermal load fluctuates in a specific area As a result, the reach distance of the conditioned air is shortened. As a result, there is a problem in that the temperature of the entire air conditioned room varies and the comfort is impaired.

  The present invention pays attention to such a conventional problem, and its purpose is to quickly achieve the desired temperature and humidity in the entire air-conditioned room while avoiding variations in the room temperature and humidity in the air-conditioned room. The object is to provide a Coanda airflow air conditioning system that can be adjusted.

  A first characteristic configuration of the present invention is a Coanda airflow air-conditioning system that air-conditions air-conditioning air that is blown out from an air-conditioning apparatus by a Coanda effect while adhering to the ceiling surface of the air-conditioning target room. The control unit for automatically controlling the operation of the air conditioner is configured to be capable of adjusting the amount of air blown out, and the air conditioning unit maintains a constant separation distance from which the air conditioned air from the air conditioner separates from the ceiling surface. It is in the point which adjusts the blowing air volume of the conditioned air from the apparatus.

  According to this configuration, the control device that automatically controls the operation of the air conditioner maintains a constant separation distance from which the conditioned air from the air conditioner detaches from the ceiling surface, and controls the blown air volume of the conditioned air from the air conditioner. Since the air conditioning air separation distance from the ceiling surface is kept constant to avoid variations in the indoor temperature and humidity in the air conditioning target room, the entire air conditioning target room is desired by adjusting the air flow rate of the air conditioning air. The temperature and humidity can be adjusted quickly.

  According to a second characteristic configuration of the present invention, the control device determines an air volume determining unit that determines a blown air volume of the conditioned air from the air conditioner according to an indoor condition of the air conditioning target room, and a determined air volume by the air volume determining unit. Correspondingly, it comprises a wind speed determining means for determining the blown air speed of the conditioned air for maintaining the separation distance constant, and adjusting the blown air volume of the conditioned air from the air conditioner to the determined air volume by the air volume determining means, It is in the point which adjusts the blowing wind speed of the conditioned air from the said air conditioner to the determined wind speed by the said wind speed determination means.

  According to this configuration, the air volume determining means determines the blown air volume of the conditioned air according to the room condition of the air-conditioning target room, and the wind speed determining means corresponds to the determined air volume by the air volume determining means and the separation distance of the conditioned air The blowout wind speed for maintaining a constant value is determined. Then, the control device that automatically controls the operation of the air conditioner adjusts the blown air volume of the conditioned air to the determined air volume by the air volume determining means, and adjusts the blown air speed of the conditioned air to the determined air speed by the wind speed determining means. It is possible to automatically perform quick air conditioning without variations in indoor temperature and humidity.

3rd characteristic structure of this invention is equipped with the opening area change means to change the opening area of the blowing part of the said air conditioner,
The control device is configured to adjust the blown air speed of the conditioned air from the air conditioner by changing the opening area of the blowing portion by the opening area changing means.

  According to this configuration, it is possible to reliably adjust the blown air speed of the conditioned air by changing the opening area of the blowing portion of the air conditioner using the opening area changing means that is relatively simple and inexpensive.

  According to a fourth characteristic configuration of the present invention, when the farthest indoor temperature in the farthest area of the air conditioning target room away from the air conditioner deviates from a target temperature by a predetermined temperature difference or more, the control device The point is to increase the blown air velocity of the conditioned air, or to increase both the blown air amount and the blown air velocity of the conditioned air from the air conditioner.

  According to this configuration, in the farthest area far from the air conditioner, when the farthest indoor temperature deviates from the target temperature by a predetermined temperature difference or more, the control device increases the blown air speed of the conditioned air, or the conditioned air Therefore, it is possible to quickly air-condition the air in a desired state even in the farthest area where it is difficult to air-condition.

Side view showing outline of Coanda airflow air conditioning system Front view showing air conditioner damper Front view showing another embodiment of the damper Front view showing still another embodiment of the damper

An embodiment of a Coanda airflow air conditioning system according to the present invention will be described with reference to the drawings.
The Coanda airflow air conditioning system applies the Coanda effect of a fluid, that is, the characteristic that “the fluid flows while adhering to a smooth surface” to the air conditioning system. Therefore, as shown in FIG. 1, the air conditioner 1 is arranged near the ceiling surface 3 of the air-conditioning target room 2, and the conditioned air A blown from the blowing unit 4 of the air conditioner 1 is formed on the flat ceiling surface 3. Installed to flow while adhering.
A part of the conditioned air A blown out from the blowing unit 4 of the air conditioner 1 gradually departs downward immediately after the blowout, mainly air-conditioning the air conditioner 1 side, and finally all departs downward. Thus, the entire air-conditioned room 2 is air-conditioned. However, in FIG. 1, for ease of understanding, the average flow (flow in the center portion) of the conditioned air A is illustrated, and after being blown out from the blowout portion 4, the ceiling surface 3 adheres to the ceiling surface 3. 3, and then flows downward from the ceiling surface 3.

Referring to FIG. 1, the separation distance L from the blowing unit 4 of the air conditioner 1 to the separation point is related to the blowing air speed of the conditioned air A, and the separation distance L becomes long as the blowing wind speed increases. The separation distance L is shortened when the blowout wind speed is reduced. However, if the opening area of the blowing unit 4 is constant, the blowing air speed increases when the blowing air volume of the conditioned air A is increased, and the blowing wind speed decreases when the blowing air volume is decreased. Therefore, it is difficult to change and adjust the blown air volume of the conditioned air A while maintaining the separation distance L constant.
The Coanda airflow air-conditioning system of the present invention makes it possible to adjust the blown air volume of the conditioned air A in the air conditioner 1 in which the blown air volume of the conditioned air A can be adjusted while the separation distance L of the conditioned air A is maintained constant. Is. For this reason, a control device 5 with a built-in computer that automatically controls the operation of the air conditioner 1 is provided, and a damper 6 (an example of an opening area changing means) that changes the opening area of the blowout portion 4 of the air conditioner 1 is provided. As shown in FIG. 2, the damper 6 is provided at an opening portion of the blowing portion 4, and has a fixed plate body 6 a having a large number of openings that are elongated in the vertical direction, and a large number of openings that are also elongated in the vertical direction. A movable plate 6b slidable in the lateral direction is provided. Incidentally, FIG. 2A shows the fully opened state of the damper 6 and FIG. 2B shows the half-opened state.

The control device 5 includes an air volume determining unit 5a and an air speed determining unit 5b. The air volume determining unit 5a is configured to control the air conditioning target room 2 based on temperature information from a plurality of temperature sensors 7a and 7b provided in the air conditioning target room 2. The room temperature is detected, and thereby the blown air volume of the conditioned air A is determined. On the other hand, the wind speed determining means 5b determines the blown air speed of the conditioned air A for maintaining the separation distance L of the conditioned air A constant corresponding to the determined air volume by the air volume determining means 5a.
Based on the information from the air volume determination means 5a, the control device 5 changes, for example, the rotational speed of the fan built in the air conditioner 1 to change the blown air volume of the conditioned air A from the air conditioner 1 as the air volume determination means. Adjust to the determined air volume according to 5a. And based on the information from the wind speed determination means 5b, the movable plate body 6b of the damper 6 is slid and the opening area of the blowing part 4 is changed and adjusted, and the blown air speed of the conditioned air A from the air conditioner 1 is determined as the wind speed determination means. Adjust to the determined wind speed according to 5b.
The adjustment of the blown air volume and the blown air velocity (opening area of the blowing unit 4) of the conditioned air A can be handled by, for example, collecting the relational data of both in advance through experiments and storing them in the control device 5. Is possible.

Next, the operation of this Coanda airflow air conditioning system will be described.
First, based on, for example, data collected in advance by an experiment or the like, the controller 5 determines the separation distance L of the conditioned air A suitable for air-conditioning the entire air-conditioned room 2 almost uniformly. Then, the air-conditioning target room 2 is air-conditioned.
In the case of cooling the air-conditioning target room 2, cool air as the air-conditioned air A is blown out from the blowing unit 4 of the air-conditioning apparatus 1, and the temperature of the air-conditioning target room 2 is maintained at a set desired cooling temperature.
In this state, for example, when a large number of people enter the air-conditioning target room 2 and the room temperature rises as a whole, the air volume determining means 5a determines the amount of cool air blown out based on the temperature information from the temperature sensors 7a and 7b. The controller 5 decides on the increase side, and the control device 5 adjusts the blown air volume of the cold air so that the increased determined air volume is obtained. On the other hand, when the room temperature becomes lower as a whole, the air volume determining means 5a determines the cool air blowing air volume to the decreasing side, and the control device 5 adjusts the cold air blowing air volume so that the reduced determined air volume is obtained. To do.

In any case, the wind speed determining means 5b determines the blowing wind speed for maintaining the cold wind separation distance L constant, and the control device 5 adjusts the opening area of the blowing section 4 by the damper 6 so that the cold wind The blown wind speed is adjusted to the determined wind speed by the wind speed determining means 5b, and the separation distance L of the cold wind is maintained constant.
And, for example, as shown in FIG. 1, the farthest room temperature detected by the temperature sensor 7b located in the farthest area due to the influence of solar radiation is the glass window 8 in the farthest area away from the air conditioner 1. When the temperature difference deviates from a desired cooling temperature (target temperature) by a predetermined temperature difference or more, the control device 5 performs control so as to increase the blowing air speed of the cold air, and the farthest indoor temperature in the farthest area is set to the desired cooling temperature. To adjust quickly. Thereafter, when the farthest indoor temperature in the farthest area is adjusted to the desired cooling temperature, the control returns to the original control state, that is, the control for keeping the cold air separation distance L constant.

On the other hand, in the case of heating, hot air as conditioned air A is blown out from the outlet 4 of the air conditioner 1 to maintain the temperature of the air-conditioning target room 2 at a set desired heating temperature.
In this state, when the indoor temperature of the air-conditioning target room 2 is lowered as a whole, the air volume determining means 5a determines the amount of hot air blown to the increase side based on the temperature information from the temperature sensors 7a, 7b, and the control device 5 adjusts the blowing air volume of the warm air to the increased determined air volume. On the other hand, when the room temperature increases as a whole, the air volume determining means 5a determines the hot air blowing air volume to the decreasing side, and the control device 5 adjusts the hot air blowing air volume to the reduced determined air volume.

Also in the case of this heating, the wind speed determining means 5 b determines the blown air speed for maintaining the hot air separation distance L constant, and the control device 5 determines the wind speed of the hot air by adjusting the damper 6. By adjusting the determined wind speed by means 5b, the separation distance L of the warm air is kept constant.
For example, the farthest indoor temperature detected by the temperature sensor 7b located in the farthest area under the influence of the cold outside air temperature through the glass window 8 is a predetermined temperature set in advance from a desired heating temperature (target temperature). When the difference is more than the difference, the control device 5 performs control so as to increase the blowing air speed of the hot air, and quickly adjusts the farthest indoor temperature in the farthest area to a desired heating temperature. Thereafter, as soon as the farthest indoor temperature in the farthest area is adjusted to the desired heating temperature, the control returns to the original control for maintaining the hot air separation distance L constant.

  Further, during cooling or heating, the control device 5 may not adjust the farthest indoor temperature in the farthest area to the desired target temperature even if the state where the blown air speed of the conditioned air is increased for a certain period of time. In addition to the increase in the blown air speed of the conditioned air, the control can be performed to increase the blown air volume of the conditioned air to further promote the adjustment of the farthest indoor temperature in the farthest area to the desired target temperature. . In the present embodiment, when the farthest indoor temperature deviates from the target temperature by a predetermined temperature difference or more, the control device 5 initially increases the blown air speed of the conditioned air, and then increases the blown air volume of the conditioned air as appropriate. Although it is configured to increase both the blown air volume and the blown air speed in a form to be performed, for example, the blown air volume is not increased only by increasing the blown air speed, or both the blown air volume and the blown air speed of the conditioned air are increased from the beginning. As described above, in addition to the increase in the blown air speed of the conditioned air, whether or not to increase the blown air volume of the conditioned air and the start timing thereof can be appropriately changed.

[Another embodiment]
(1) In the previous embodiment, the configuration of the damper 6 shown in FIG. 2 was shown as an example of the opening area changing means for changing the opening area of the blow-out portion 4, but as shown in FIG. A damper 6 comprising a fixed plate 6c having a plurality of elongated openings and a movable plate 6d having a plurality of openings elongated in the lateral direction and slidable in the vertical direction may be used as the opening area changing means. 3A shows a fully open state, and FIG. 3B shows a half-open state.
Furthermore, as shown in FIG. 4, the fixed plate body 6e in which a large number of small openings are arranged in a staggered pattern, and a large number of small openings are also arranged in a staggered pattern and can be slid in the horizontal direction. The damper 6 comprising the movable plate 6f can also be used as the opening area changing means. FIG. 4A shows a fully open state, and FIG. 4B shows a half open state.
Moreover, about the installation location of the damper 6 as an opening area change means, it is not limited to the opening site | part of the blowing part 6 like previous embodiment, For example, it is a little behind the opening site | part in the blowing part 6. The opening area of the blowing part 6 can be set as appropriate within a range that can be changed, such as being installed at a position.

(2) In the previous embodiment, the temperature sensor 7a, 7b was provided in the air-conditioning target room 2 to detect the indoor temperature, thereby detecting the indoor state of the air-conditioning target room 2, but the air-conditioning target room 2 It is also possible to provide a humidity sensor to detect indoor conditions based on indoor humidity. Furthermore, it is also possible to provide a temperature sensor and a humidity sensor to detect the room condition from both the room temperature and the room humidity.
Moreover, although the air volume determination means 5a showed the structure which determines automatically the blowing air volume of the conditioned air A according to the indoor condition of the air-conditioning target room 2, regarding the blowing air volume of the conditioned air A, for example, for air volume adjustment It is also possible to provide a dial, a switch, etc. so that the user can artificially set by manual operation. In this case, the wind speed determining means 5b determines the blown wind speed of the conditioned air A based on information from a dial or switch for air volume adjustment.

DESCRIPTION OF SYMBOLS 1 Air conditioning apparatus 2 Air-conditioning object room 3 Ceiling surface 4 Outlet part 5 Control apparatus 5a Air volume determination means 5b Wind speed determination means 6 Damper (opening area change means)
A Air-conditioned air L Separation distance

Claims (4)

A Coanda airflow air conditioning system that air-conditions the air-conditioned air that is blown from the air-conditioning device by the Coanda effect while flowing on the ceiling surface of the air-conditioning target room.
The blowout air volume of the conditioned air from the air conditioner is configured to be adjustable,
A control device that automatically controls the operation of the air conditioner adjusts the blown air volume of the conditioned air from the air conditioner in a state where the separation distance from which the conditioned air from the air conditioner detaches from the ceiling surface is maintained constant. Coanda airflow air conditioning system.   The control device determines an air volume determining means for determining an air volume blown out from the air conditioner according to an indoor condition of the air conditioning target room, and makes the separation distance constant corresponding to the air volume determined by the air volume determining means. A wind speed determining means for determining the blown air speed of the conditioned air to be maintained, adjusting the blown air volume of the conditioned air from the air conditioner to the determined air volume by the air volume determining means, and blowing the conditioned air from the air conditioner The Coanda airflow air conditioning system according to claim 1, wherein a wind speed is adjusted to a wind speed determined by the wind speed determining means. Comprising an opening area changing means for changing the opening area of the outlet of the air conditioner;
3. The Coanda airflow air conditioning system according to claim 1, wherein the control device adjusts the blown air speed of the conditioned air from the air conditioner by changing the opening area of the blowing portion by the opening area changing unit.   When the farthest indoor temperature in the farthest area of the air conditioning target room away from the air conditioner deviates from a target temperature by a predetermined temperature difference or more, the control device increases the blown air speed of the air conditioned air from the air conditioner, Or the Coanda airflow air-conditioning system of any one of Claims 1-3 which increases both the blowing air volume and the blowing wind speed of the air-conditioning air from the said air conditioner.

Images