JPH0367948A - Controller of air conditioner by blowing floor - Google Patents

Abstract

PURPOSE:To obtain the optimum rise characteristics of a blowout air flow by changing a blowout air capacity in accordance with the characteristics of cooling and heating based on a difference between a blowout air temperature and an indoor temperature. CONSTITUTION:The blowout air 7 of an air conditioner 6 equipped with a heat exchanger and a blower is guided to an underfloor space 3 by an inlet duct or the like connected to the air conditioner 6 and blown out from a blowout opening 5 into a room 4 to be air-conditioned. Temperature sensors 8 and 8a provided in the passage of the blowout air 7 convert a temperature to an electric current value or an electric voltage value. The conversion characteristics of the sensors 8 and 8a may show a linearly proportional relationship between both as well as possible. The sensors 8 and 8a are the same as each other. The output of the sensors 8 and 8a is inputted to a comparator 9 and a difference in input signal levels is outputted as a temperature difference. The comparator 9 is composed of a differential amplifier and the like. A body sensory temperature is different in heating and cooling. Therefore, it is desir able that the height of the blowout opening 5 is large in cooling and, inversely, small in heating. When above-mentioned temperature difference is large, an air capacity is increased and, when the temperature difference is small, the supply air capacity is inversely reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a control device for a floor blowing air conditioner in which an air outlet is provided in the floor so as to blow out conditioned air from the floor.

(Prior art) Conventionally, this type of floor-blowing air conditioner uses an air supply chamber under the floor in order to give the outlet airflow characteristics unique to the outlet. Control is performed based on various factors such as.

These factors were determined within the expected range for actual use, and when used within this range, a blowout airflow was obtained that maintained a good thermal environment in the room.

However, if the amount of blown air and the temperature difference between the blown air temperature during cooling and the indoor temperature are not appropriate, especially when this temperature difference is large, there is a drawback that the cold air stays near the floor surface.

Therefore, some devices are equipped with guide vanes at the air outlet to control the rising characteristics of the airflow. That is, the direction of the guide vane is controlled based on the amount of air blown out and the temperature difference between the room temperature and the blown air temperature.

(Problems to be Solved by the Invention) Description: Although a device in which a guide vane is provided at the air outlet enables ideal air conditioning control, it has the drawback that the mechanical configuration of the floor air outlet is complicated.

The present invention has been made in view of the above circumstances, and its purpose is to provide a control device for an air conditioner using floor blowing, which can secure an ideal air-conditioned room while using a conventional simple air outlet. .

(Means for Solving the Problems) In order to achieve the above object, a control device for a floor blowing air conditioner according to the present invention includes a control device for controlling a temperature of the air blown from the air conditioner, and A comparator is provided to compare the measured temperature difference between the blown air temperature measuring device and the indoor temperature measuring device, and based on the difference output from the comparator, the amount of air blown from the air conditioner is determined. It increases or decreases.

(Function) The smaller the temperature difference between the temperature of the air blown out from the air conditioner and the temperature inside the air-conditioned room, the higher the rise of the blown airflow becomes as a thermal characteristic. Furthermore, this tendency is more pronounced in heating than in cooling.

Understand this temperature difference using a temperature measuring device and a comparator,
During cooling, when the temperature difference is large, the amount of air blown is increased so that the air flow is higher. Conversely, when the temperature difference is small during heating, by reducing the volume of air blown out, the rise height of the hot air is lowered and an ideal temperature can be obtained.

In either case, the optimal rising characteristics of the blown airflow can be obtained by changing the blown air volume in accordance with the air conditioning characteristics based on the above-mentioned temperature difference.

(Embodiments) Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

Figure 1 shows for convenience a control system for an air conditioner using floor blowing.The floating floor 2 is constructed by floating a certain space above the surface of a concrete floor slab, and the space under the floating floor 2 is shown in Fig. 1. 3 is the air supply duct.

The floating floor 2 has air outlets 5 disposed at appropriate intervals and at arbitrary positions from the underfloor space 3 to the air-conditioned room 4.

Blow air 7 of an air conditioner 6 comprising a heat exchanger and a blower
is connected and guided to the underfloor space 3 by an air supply duct or the like, and is blown out from the air outlet 5 into the air-conditioned room 4.

Temperature sensors 8 and 8a are connected to indoor air 4 and air 7 blown from air conditioner 6.
It is installed in the passageway.

The temperature sensors 8 and 8a convert temperature into an electrical current value or voltage value, and the conversion characteristics preferably show a linear proportional relationship as much as possible.
The same sensor 8a is used as the sensor 8a installed in the passage of the blown air 7.

The outputs of these sensors 8 and 8a are input to a comparator 9, and the difference in input signal levels is output as a temperature difference. This comparator 9 may be constructed from a differential amplifier or the like.

The perceived temperature is different between heating and cooling, and it is desirable that the height of the cold air blown out from the air outlet 5 during cooling is increased.
On the contrary, it is desirable to lower the temperature during heating.

Therefore, the comparator 9 may include a phase reversal circuit or the like based on the standard air flow rate, and this may be used to switch between heating and cooling.

If the difference between the temperature of the room 4, which is the air-conditioned space, and the temperature of the blown air 7 is small, the air volume or the shape of the blown air outlet 5 can be set so that the height of the air flow from the blown air outlet 5 is at an ideal height. However, when the above-mentioned temperature difference is large, the amount of air supplied by the air conditioner 6 is increased during cooling, and the height of the airflow blown from the air outlet 5 is increased. That is, when the output level of the comparator 9 increases, the supplied air volume is increased. This is the same during heating, but when the temperature difference between the blown air 7 and the room 4 is small due to the difference in perceived temperature, the supplied air volume is reduced and the height of the blown air current is lowered. The heat convergence supplied by the air conditioner 6 may be constant.

(Effects) As described in detail above, according to the control device for a floor-blown air conditioner according to the present invention, a temperature measuring device for the outlet air of the air conditioner and a temperature meter in the air-conditioned room are provided, These measured temperature differences are compared using a comparator, so you can always know the temperature difference between the indoor temperature and the air conditioner outlet temperature, and respond to the thermal environment by simply changing the amount of air outlet based on this temperature difference. The height of the airflow from the air outlet can be adjusted.

Therefore, the shape mechanism of the air outlet may be a simple opening, and there is an effect that air conditioning with a good sensible temperature can be achieved without adding a variable guide vane or the like.

[Brief explanation of drawings]

FIG. 1 is a partially cross-sectional explanatory view of an air-conditioned room for convenience and explanation of an embodiment of the present invention. 1...Floor slab 3...Underfloor space 5...1 Air outlet 7...Blowout air 9...Comparator 2... Floating floor 4...Air conditioned room 6...Air conditioner 8...Temperature sensor

Claims (1)

[Claims] A temperature measuring device for the air discharged from an air conditioner and a temperature measuring device in a room to be conditioned by the air conditioner are provided, and a comparator is provided to compare the difference in temperature between the temperature measuring device for the discharged air and the temperature measuring device in the room. A control device for an air conditioner using floor blowing, characterized in that the amount of air blown from the air conditioner is increased or decreased based on the difference output from the comparator.