JPH02166338A - Air conditioner - Google Patents

Abstract

PURPOSE:To provide an automatic control of a blowing angle and a blowing volume by a method wherein an interior thermal load is calculated in reference to a set temperature and a suction air temperature and a temperature unbalanced state within a dwelling area is detected in a precision manner in reference to a radiation temperature at a floor within a dwelling area and a surrounding temperature near a radiation heat sensing means. CONSTITUTION:This system is comprised of a thermal load calculation means 26 for use in calculating a thermal load value in an interior in reference to a sucked air temperature sensing means and a set temperature sensing means 18, a convex lens 26 and a temperature sensing element 23 arranged near a focal point of the convex lens. A floor surface temperature and a desk top surface temperature or the like and a surrounding temperature near the radiation temperature sensing means are detected in a high precision manner by the radiation temperature sensing means 20 for use in detecting the radiation temperature near the floor surface and then an unbalanced temperature is detected in reference from these both values. When the thermal load and the unbalanced temperature are lower than the set values, an air blowing volume is reduced in a substantial parallel direction to the ceiling surface by the blowing angle changing-over means 29a and 29b and in turn when both of them or either one of them is large, the air is blown slantly and downwardly and then an amount of blown air is increased.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an air conditioner, and in particular to control of the direction of air discharged therefrom.

Prior Art The conventional technology will be explained with reference to FIGS. 7 to 9. 1 is an indoor unit of a ceiling-embedded air conditioner;
The lower surface of the indoor unit 1 is opened onto the ceiling 4 and the road surface. The indoor unit 1 is composed of an outer shell 5 and a lower grille 6, and inside thereof are installed indoor heat exchangers 7a and γb of the cooling system, and a blower 8 is installed so as to be able to exchange heat with each of them. .

A rectangular suction port 1o is provided in the center of the lower grille 6, and outlet grilles 11, a, 11 are provided around the suction port 1o.
b. Approximately half of the air blown from the blower 8 passes through the heat exchanger 7a, passes through the blowout grille 11a, and blows out diagonally downward and forward. In addition, the remaining air blown from the blower 8 is passed through the heat exchanger 7b, and is passed through the air outlet grill 11.
The structure is such that the air passes through b and blows out diagonally downward and forward.

Furthermore, movable louvers 12a and 12b are installed to control the direction of each blowout air.

A remote control type temperature setting means 1oo is provided which allows the user to set the room temperature to any desired temperature.

A suction temperature detection means 13 is fixedly installed inside the suction port 10, and it measures the suction temperature and detects the temperature difference from the temperature set by the temperature setting means 100, and turns the cooling system OFF. is maintained roughly.

The operation of the conventional ceiling-embedded air conditioner configured in this manner will be explained.

Then, the temperature of the chamber 14 is adjusted.

The room 14 has a ceiling 4. It is composed of side walls 15, 16 and a floor 17. Also, the space surrounded by the two-dot chain line in FIG. 8 is the living area, and in ASHRAE's 5TANDARD, the living area is defined as a space with a height of 1800 degrees or less and a distance of 600 degrees or more from the side wall. It is defined that humans generally operate in this habitat.

At this time, the streamlines of the blown air are such that the air warmed by the heat exchangers ya and 7b (cooled during cooling) is blown diagonally downward from the outlet grilles 11a and 11b, and Warm the inside of room 14 in a large arc within the area (
(cooled) and then sucked into the central suction port 10 of the indoor unit 1. At this time, each of the blown air flows a and b is the blown air volume between the roads.

In the blowing direction, the streamlines of airflows a and b all draw approximately the same arc.

By detecting the temperature of the air sucked in in this manner by the suction temperature detection means 13, the temperature of the blown air is adjusted to maintain the average temperature in the living area of the room 14 at approximately the set temperature.

Problems that the invention aims to solve The ceiling of a store, office, or living room is 2.5 to 3 cm above the floor.
This is the height of the body, and when the indoor unit is installed at this position,
In order to send the temperature-controlled air blown out from the indoor unit into the living area and maintain a good temperature distribution, the blowing air speed must be extremely high. Therefore, people who are directly under the air outlet must The blown wind causes a sensation of pleasure on the head and face, causing a sensation of coldness, which poses a problem in that a high level of comfortable space cannot be provided.

In addition, especially during heating, high temperature air stagnates near the ceiling due to the specific weight of air, and the area above the ceiling, which is the area of human activity, is heated unnecessarily, making it extremely inefficient. This resulted in poor heating performance and high running costs.

The present invention calculates the indoor heat load amount from the set temperature and the intake air temperature, and accurately detects the temperature imbalance in the living area from the radiant temperature of the floor etc. in the living area and the ambient temperature near the radiant temperature detection means. It is an object of the present invention to provide an air conditioner that automatically controls the blowout angle and the blowout air volume using a blowout angle switching means and a blowout air volume switching means based on these output results.

Means for Solving the Problems In order to achieve the above object, the air conditioner of the present invention detects the radiant temperature of the floor, etc. from the radiant temperature detecting means, which is composed of a convex lens and a temperature detecting element provided near the focal point of the convex lens. Calculate the temperature imbalance from both the power and the ambient temperature output from the ambient temperature detection means installed near the radiant temperature detection means,
It also has an indoor heat load calculating means for calculating the indoor heat load from the intake air temperature and the set temperature output. Only when the above-mentioned temperature imbalance and indoor heat load are both smaller than the preset values, the air conditioner's air outlet angle should be set approximately parallel to the ceiling surface. In order to bring the temperature closer to the set value, the air blowing angle is directed into the living area in order to reduce the temperature distribution in the vertical direction, and the air blowing angle switching means and blowing air volume switching means are provided to increase the blowing air volume.

Effect The present invention has the above-described configuration, so that the temperature of the intake air and
In addition to detecting and calculating the set temperature and determining the amount of heat load in the room, the temperature imbalance detection means accurately detects the amount of imbalance between the temperature of the living area and the temperature of the floor surface, etc., and detects the amount of heat load and temperature imbalance. If either of them is large, the blowing angle switching means blows out diagonally downward and increasing the blowing air volume, and if both the heat load amount and temperature imbalance are small, the blowing angle switching means By controlling the air to blow out almost horizontally with the ceiling surface, when there is a large difference in heat load and temperature between the living area air temperature and the floor surface, etc. at the beginning of operation, when you want to quickly cool or heat the living area, the air blows out diagonally forward and downward. Blows out a large amount of air and adjusts the temperature in a short time. When the room temperature becomes stable, the difference between the indoor temperature and the set temperature becomes smaller, and the temperature imbalance also becomes smaller.If the air outlet angle is set almost parallel to the ceiling, strong winds will hit people in the living area, making them uncomfortable. prevent this from occurring. In addition, since the blowing air blows out along the ceiling surface, the wind speed is difficult to decelerate, and a large circulation is generated throughout the room from the ceiling to the side wall to the floor to the air conditioner suction opening, making the entire room uniform. Adjust the temperature. In addition, especially in heating operation,
It becomes possible to carry high-temperature air that tends to accumulate near the ceiling above the living area into the living area by a substantially horizontal blowout flow.

In addition, if there are obstacles on the side walls or ceiling that impede convection (for example, bookshelves, fluorescent lights, etc.), circulation will not reach the floor area and the temperature difference between the floor temperature and the set temperature will increase. In order to accurately detect large imbalances between the air temperature in the living area and the floor temperature using the radiant temperature detection means, even when the temperature is low, the temperature in the living area is maintained near the set temperature by blowing diagonally downward at a large air volume. can.

EXAMPLE An example of the present invention will be described below with reference to FIGS. 1 to 6. Note that explanations of the same components as those of the prior art will be omitted, and only the different points will be described.

FIG. 1 is a configuration diagram showing an embodiment of the present invention. Reference numeral 18 indicates indoor temperature setting means, and reference numeral 19 indicates intake air temperature detection means provided inside the suction grill 10, which indicates the temperature of the intake air in the upper part of the chamber 14. Detect.

Further, 2o is a radiant temperature detection means, which has a configuration in which a convex lens 22 is tightly fitted to the lower surface of a cylindrical outer shell 21 that opens downward, and a temperature detection element 23 is provided near the focal point of the convex lens 22. . Further, the ambient temperature detecting means 24 should be installed inside the radiant temperature detecting means 20, but should not be installed near the focal point of the convex lens.

As a result, the heat is collected by the convex lens 22, and the radiation temperature detection means 2o, which can amplify and detect the effects of radiation from the floor, etc., accurately detects the temperature affected by the floor temperature and the surface temperature of desks, etc. placed in the living area. At the same time, the ambient temperature detection means 24 detects the temperature around the radiant temperature detection means 20.

The temperature signal detected in this manner is sent to the control device 26. The control device includes a heat load calculation means 26.a temperature amparanne detection means 27. Blowout angle determining means 28. It is composed of blowing angle switching means 2ga and 2gb. The heat load calculation means 26 calculates the heat load based on the temperature signals from the suction air temperature detection means 19 and the indoor temperature setting means 18, and the temperature imbalance detection means 27 calculates the heat load based on the temperature signals from the radiant temperature detection means 2o. Signal and ambient temperature detection means 24
The system detects the temperature imbalance between the floor and the living area based on the temperature signal from the floor. The blowing angle determining means 28 and the blowing air volume determining means 30 determine the blowing angle and the blowing air volume based on the output signals of the heat load calculation means 26 and the temperature imbalance detecting means 27.

The blowout angle switching means 29&, 29b change the angles of the loopers 12a, 12b based on the blowout angle setting signal sent from the blowout angle determining means 28.

Further, the blowing air volume switching means 31 is the blowing air volume determining means 3o.
The airflow volume is changed based on the airflow setting signal sent from the controller.

The blowout angle switching means 29& includes a pulse motor 33a with a motor shaft 32a having a female thread at the tip as shown in FIG. It is constructed with a shaft 32a, and the male thread of the drive shirt 32a is screwed into the female thread of the motor shaft 32a.

Next, the operation of the air conditioner configured as described above will be explained using the flowchart shown in FIG.

After the person using the room 14 turns on the power of the air conditioner 1, the temperature is set to a desired room temperature Taet in step 36, and the operation of the air conditioner is started.

Further, in step 3e, the suction air temperature T0 is detected by the suction air temperature detection means 13 provided inside the substantially central portion of the suction grille 1o. Then, in step 37, the radiant temperature detection means 20 detects the radiant temperature Tr of the floor, desk, etc. below the indoor unit main body 1. At the same time, the radiation temperature detection means 2
The ambient temperature Ta around o is detected by the ambient temperature detection means 24.

In step 38, first, the heat load amount ΔTt is calculated from both the intake air temperature T0 and the set temperature Tset using the following equation.

ΔTl = l To−Tsat l Then, the heat load amount Δ calculated with the preset reference heat load amount ΔTt (here, Δtt=6°C)
and Tt (step 39). Here, the heat load Δ
When Tt is larger than the standard heat load amount Δtt=s°C, if the absolute value of the difference between the block suction air temperature T0 and the set temperature Tset is 5°C or more, the inside of the block room is far from the set temperature. Sometimes, go to the No side and move the louver 12a.
, 12b from the ceiling surface, it is determined that the amount of air blown out will be increased (step 40), and the air will be blown diagonally downward with a large amount of air. On the other hand, the suction air temperature T
The difference ΔTt between 0 and the set temperature Tset is the reference heat load amount Δ
If Tt is smaller than 6°C, the process proceeds to step 41 on the YES side. In step 41, the temperature imbalance ΔTa between the radiation temperature Tr detected in step 37 and the ambient temperature Ta is calculated using the following equation 3. Then, in step 42, a preset reference temperature imbalance Δta (here, Δ
ta=8°C) and the temperature imbalance ΔTa
Compare with. Here, if the temperature imbalance Δτ& is larger than the reference temperature imbalance Δta, then
If the temperature of the floor surface is significantly different from the temperature of the living area, such as during start-up operation, proceed to the No side and close the louvers 12a,
It is determined that if the angle from the ceiling of 12b is increased, the air will be blown diagonally downward and the air volume will be increased (
Step 40). As a result, the louvers 12a and 12b are closed during start-up operation, such as at the beginning of operation, or during operation under high load, such as when there is a large difference between the temperature of the floor surface and the temperature of the living area due to obstructions, etc. By increasing the angle and blowing air volume, it is possible to blow out temperature-controlled air directly into the living area, as shown in Figure 6, and the living area can quickly reach the set temperature. . When the temperature of the chamber 14 approaches the set temperature, the heat load ΔTt and the temperature imbalance ΔTa gradually become smaller.
The heat load amount ΔTt is smaller than the reference heat load amount Δ11, and as a result of temperature control of the floor surface, the temperature imbalance 7fI'a becomes smaller than the reference temperature imbalance Δta. As a result, the answer in step 42 is YES, and it is determined that the angles of the louvers 12&, 12b should be made smaller (step 43). Then, proceeding to step 42, the blowing angle switching means 29a,
29b drives each looper 12a, 12b, and sets the blowing direction so that it is approximately parallel to the ceiling surface and the blowing air volume is set to be small. . Therefore, the blown air is the 6th
Flows along the ceiling 4 as shown in the figure, facing side walls 15.16
hit the top of the. The colliding flow then changes into a downward flow and flows downward along the side walls 15, 16. After reaching the floor 17, the air spreads across the floor 17 and is sucked in from the suction port 1o of the indoor unit 1, making noise and generating large circulation throughout the room 14. Therefore, strong winds do not occur in the living area, and the temperature can be controlled softly from the outer shell near the wall of the room 14.

According to the above embodiment, when the heat load is large, when the temperature imbalance is large, or when the operation is in the early stages, the control directs the blowing direction toward the front floor and increases the blowing air volume. By doing so, temperature-controlled air is rapidly delivered into the living area and controlled so that the desired temperature is quickly reached. On the other hand, the temperature of the chamber 14 approaches the set temperature, and the heat load amount ΔTt and the temperature imbalance Δ
If either Ta is smaller than the reference value, the direction of the air is set to be horizontal to the ceiling, and the amount of air is also reduced to generate a flow along the ceiling surface. Since the blown air flows along the ceiling surface, the wind speed is difficult to decrease, and after reaching the upper end of the side wall 15.16 while following the ceiling surface, it flows downward along the side wall 15.16 to the floor surface 17. hand,
It is sucked into the suction port 1o of the indoor unit 1. This result room 1
4, a large circulation occurs along the wall surface. In other words, when the temperature of the room 14 reaches a substantially stable temperature, the air outlet is placed near the ceiling outside the living area, and the temperature of the living area is controlled from the outer shell. This prevents strong winds from reaching the living area and eliminates the discomfort caused by the wind. In addition, since the airflow flows along the wall, it is difficult to decelerate and the airflow is reliably circulated, making it possible to achieve a more uniform temperature distribution in the room.

Especially during heating, high-temperature air tends to stay near the ceiling 4, and it wastefully heats the upper part of the room.

This kind of high-temperature air is blown away by a horizontal blowout flow,
Since it is carried into the living area, efficient heating is possible.

In addition, if an obstacle such as a library is installed near the side wall 16, the above-mentioned circulation will be difficult to occur.
The temperature in the vicinity is significantly different from the set temperature Ttet. The temperature of the bed floor 17 is detected by the radiant temperature detection means, and when it is determined that the temperature imbalance has become large, step 41) switches to diagonally downward blowing, so that the living area can be maintained at a desired temperature.

In this embodiment, the motors 33a and 33b are used to drive the louvers 12a and 12b, but it is also possible to drive the louvers 12a and 12b using a shape memory alloy or the like. It is.

Effects of the Invention As is clear from the embodiments, the present invention provides a heat load calculating means for calculating the indoor heat load using a suction air temperature detecting means and a set temperature detecting means, and a convex lens provided near the focal point of the convex lens. The radiant temperature detection means, which consists of a temperature detection element and detects the radiant temperature near the floor surface, detects the surface temperature of the floor, desk, etc. as well as the ambient temperature near the radiant temperature detection means with high precision, and detects temperature imbalance from both. Detect.

When both the heat load amount and the temperature imbalance are smaller than preset values, the air blowing angle switching means controls the blowing air so that it blows out substantially horizontally to the ceiling surface, and controls the blowing air volume to a small value. In addition, if either or both of them are large, the air is blown diagonally downward and the air volume is controlled to be large. In the early stages, temperature-controlled air must be fed into the living area to quickly reach the desired temperature. Then, when the operation becomes stable and the temperature approaches the set temperature, and the temperature imbalance becomes small, a horizontal blowout flow is generated in the non-inhabited area, and a large convection flow is generated throughout the room along the ceiling surface.

For this reason, the blown airflow does not directly illuminate people in the living area, so they do not feel uncomfortable due to the airflow.

In addition, since the airflow flows along the ceiling surface, the wind speed is less likely to drop, ensuring more reliable circulation throughout the room, and greatly improving the indoor temperature distribution.

Furthermore, since the temperature of the ceiling surface and side walls is controlled at the same time, discomfort caused by cold radiation and warm radiation from these surfaces is reduced.

Especially during heating, high-temperature air tends to accumulate near the ceiling, but horizontal blowing allows the high-temperature air from above to be carried into the living area, allowing for more efficient heating.

In addition, if there are obstacles such as a library or fluorescent light near the side walls or near the ceiling, circulation will be difficult to occur and it will be difficult to control the temperature down to the floor near the bottom of the living area. However, in this case, the temperature imbalance becomes large, so the horizontal blowing state is changed to the downward blowing state, and the control is performed to bring the living area to the desired temperature.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIGS. 2 and 3 are enlarged views of main parts of the embodiment, and FIG. 4 is a flowchart showing an example of a program for determining the blowout angle. Figure 5 is a diagram showing the indoor airflow during startup operation, Figure 6 is a diagram showing the indoor airflow during stable operation (horizontal blowout), Figure 7 is a bottom view of a conventional air conditioner, and Figure 8 is a diagram showing the indoor airflow during startup operation. The figure is a central sectional view of the air conditioner, and FIG. 9 is a diagram showing indoor airflow in a conventional example. 18... Indoor temperature setting means, 19...
Blowing air temperature detection means, 20... Radiation temperature detection means, 23... Temperature detection element, 24...
...Ambient temperature detection means, 25...Control device, 2
6...Heat load calculation means, 27...Temperature unbalance detection means, 28...Blowout angle determination means, 29a, 29b...Blowout angle switching Means, 3o...- Blowing air volume determining means, 31...
...Blowout air volume switching means. Name of agent: Patent attorney Shigetaka Awano and 1 other person

Claims (1)

[Claims] A convex lens, a temperature detection element provided near the focal point of the convex lens, and a radiant temperature output from a radiant temperature detection means for detecting the radiant temperature of a floor, etc. in a living area based on a signal from the temperature detection element, and a temperature detection element provided near the radiant temperature detection means. Temperature unbalance detection means detects the temperature imbalance between the indoor temperature and the floor surface etc. based on the ambient temperature output from the ambient temperature detection means, and the indoor an indoor heat load amount calculation means for calculating the heat load amount of the indoor heat load amount calculation means; a blowout angle switching means and a blowout air volume switching means for arbitrarily changing the blowout angle based on the output signals of both the temperature imbalance detection means and the indoor heat load amount calculation means; An air conditioner characterized by: