JPH01169256A - Air-conditioner - Google Patents

Abstract

PURPOSE:To prevent feeling of discomfort produced when subjected to a strong wind for a long time, by deciding indoor thermal load from setting temperature output and temperature output, measuring the rate of change within a specified time at a room temperature, changing over a blowoff angle from these signals, and performing time control. CONSTITUTION:A thermal load decision means 21 for a control device 20 measures thermal load from temperature signals transmitted from a room temperature detection means 19 and a room temperature setting means 18 while a temperature change rate measurement means 22 measures the rate of change in a room 14. A blowoff angle decision means 23 decides from said thermal load decision means 21 and said temperature change rate measurement means 22 whether a blowoff angle should be a downward blowoff angle to a floor surface 17 or a repetition mode should be selected where a horizontal blowoff parallel to a ceiling 4 and a downward blowoff are repeated intermittently. A time control means 24 of the blowoff angle controls blowoff time. A blowoff angle change over means 25a and 25b change the angle of a damper from signals transmitted from the blowoff angle decision means 23.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an air conditioner, and particularly to a method for controlling the direction of air blown therefrom.

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

A rectangular inlet 1o is provided in the center of the lower grille 6, and outlet grilles 11a, 11b are provided around the inlet 10.
has been established. 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 passes through the heat exchanger 7b and passes through the air outlet grill 1''1.
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 (100) is provided so that the user can set the room temperature to any desired temperature. A suction temperature sensor 13 is fixedly installed inside the suction port 10, and measures the suction temperature as well as temperature setting means (100
) is detected, and the cooling system is turned ON-OFF or capacity controlled to maintain the indoor temperature at approximately -.

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

Generally, the air conditioner of the present invention is often installed on the ceiling of a living room, and adjusts the temperature of the room 14.

The room 14 is composed of a ceiling 4, side walls 15, 16, and a floor 17. Furthermore, 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 1 in 1800 or less and a distance of 600 FIn or more from the side wall. In other words, it is defined that humans generally operate within this habitat.

At this time, the flow lines of the blown air are as shown in FIG. 8, where the air warmed by the heat exchangers a and 7b (cooled during cooling) is blown diagonally downward from the air outlet grilles 1ta and 11b. It warms the inside of room 14 in a large arc within the living area (
(cooling) Then, it is sucked in from the central suction port 10 of the indoor unit 1. At this time, each blown airflow a1 and b is the blown air volume between the paths.

This is the blowing direction, and the streamlines of airflows a and b both symmetrically draw approximately the same arc.

The temperature of the air sucked in this way is measured by the suction temperature sensor 1.
3, and by controlling the capacity of the cooling system, the temperature of the blown air is adjusted, and the average temperature in the living area of the room 14 is maintained at approximately the set temperature.

The problem that the invention aims to solve The ceiling of a living room, store or office is 2.5 to 3 meters above the floor.
When the indoor unit is installed in this position, the blowing air speed must be extremely high in order to send the temperature-controlled air blown from the indoor unit into the living area and maintain a good temperature distribution. There must be. For this reason, people who are directly under the air outlet may experience discomfort as the air blows against their head or face, or they may feel cold due to the wind, so they may not be able to maintain a high level of comfortable space. There was a problem that it could not be provided.

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

The present invention determines the indoor heat load from the set temperature and room temperature, detects both the temperature change rate of the room temperature, and when either of these is larger than a preset value, the temperature of the indoor unit is adjusted. When the controlled air is blown out diagonally downward and directly blown into the living area, and both the heat load calculation result and the temperature change rate calculation result are smaller than the preset value, In other words, once stable operation is reached, a time control means such as a timer is used to alternate between horizontal air blowing almost horizontally to the ceiling and diagonally downward blowing into the living area, using a timer or other time control means. The purpose is to provide air conditioners.

Means for Solving the Problems In order to achieve the above object, the air conditioner of the present invention calculates the indoor heat load based on the set temperature output from the set temperature detection means and the temperature output from the room temperature detection means. an indoor temperature detecting means and a temperature change rate measuring means for measuring a temperature change rate within a predetermined period of time of the temperature detected by the indoor temperature detecting means; Equipped with a blow-off angle determining means for determining the angle, a blow-off angle switching means for switching from diagonal downward blow-out to substantially horizontal blow-off, and a blow-off angle time control means, the difference between the indoor temperature and the set temperature is large, as at the beginning of operation. , when the rate of temperature change is large, the air is blown diagonally downward, - direction, K during stable operation,
When the difference between the indoor temperature and the set temperature is small and the rate of temperature change is small, the air outlet angle is set to a repeating mode that alternates between horizontal air blowing almost horizontally to the ceiling and diagonally downward air blowing into the living area. Equipped with time control means.

Function: With the above-described configuration, the present invention detects the indoor temperature and the set temperature to determine the indoor heat load, and also measures the temperature change rate of the room temperature within a predetermined time using the temperature change rate measuring means. If either the heat load amount or the temperature change rate is large, the air is blown diagonally downward, and if both the heat load amount or the temperature change rate is small, the air outlet angle is changed to approximately parallel to the ceiling surface. By controlling it so that it blows out,
When the heat load and temperature change rate are large, such as at the beginning of operation, and you want to quickly cool or heat the living area, the air is blown diagonally forward and downward to control the temperature in a short period of time. When the room temperature becomes stable, the difference between the indoor temperature and the set temperature becomes smaller, and the rate of temperature change also becomes smaller.Based on these output signals, the air blowing angle is made horizontal to the ceiling surface, and air is blown directly into the living area. Since it is in a repeating mode that repeatedly blows diagonally downward, it prevents people in the living area from being exposed to strong wind for a long time and causing discomfort. In addition, since the horizontal air blows out along the ceiling surface, the wind speed is difficult to slow down, and a large circulation is generated from the ceiling to the side wall, one floor to one air conditioner inlet, and the temperature of the entire room is uniformly controlled. Moreover, especially in the case of 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 in a substantially horizontal blowout flow.

EXAMPLE An example of the present invention will be described below with reference to FIGS. 1 to 5. 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, in which 18 is an indoor temperature setting means, 19 is an indoor temperature detecting means provided approximately in the center of the suction port 1Q, and the room temperature in the room 14 is representatively determined. and at predetermined time intervals. The temperature signal detected in this manner is sent to the control device 2o. The control device is composed of a heat load amount determining means 21, a temperature change rate measuring means 22, a blowing angle determining means 23, a blowing angle time control means 24, and blowing angle switching means 25a and 25b.

The heat load determining means 21 determines the heat load based on the temperature signals from the indoor temperature detecting means 19 and the indoor temperature setting means 18, and the temperature change rate measuring means 22 determines the heat load based on the temperature signals from the indoor temperature detecting means 19 and the indoor temperature setting means 18.
The rate of temperature change in the chamber 14 is measured based on the temperature signal from the chamber 9. Based on the output signals of the heat load amount determining means 21 and the temperature change rate measuring means 22, the blowing angle determining means 23 sets the blowing angle to be a downward blowing angle toward the floor 17 or a horizontal blowing angle parallel to the ceiling 4. This is to determine whether the mode is repeat mode, which alternately repeats and downward blow-out. Further, the blowing angle time control means 24 controls the time of each blowing when horizontal blowing and diagonally downward blowing are repeated.

The blow-off angle switching means 26a, 25b change the angles of the dampers 31a, 31b based on the blow-off angle setting signal sent from the blow-off angle determining means 23 and the signal from the blow-off angle time control means 24.

On the other hand, 26 is a lower grille, which has a horizontal outlet 27 that contacts the ceiling surface 4 and opens toward the side wall 15.16, and an obliquely downward outlet 28 that opens toward the floor 17.
It communicates with air passage 29.

Further, rotatable dampers 31a and 31b are installed with one edge 3° of the obliquely downward outlet 28 as a fulcrum, and the air flowing from the air passage 29 is directed to the dampers 318 and 31b.
This makes it possible to select either the horizontal outlet 27 side or the obliquely downward outlet 28 side.

Further, the blowout angle switching means 26 includes the damper s1a,
31b, which is made of a shape memory alloy coil, and is configured to be able to switch from diagonally downward blowing to horizontal blowing as shown by the broken line in FIG. 2 as the temperature rises due to energization.

Incidentally, the blowing angle switching means may be driven by an electric motor such as a Stesobing motor.

Next, the operation of the air conditioner configured as described above is explained at 7 in Figure 3.
This will be explained using a 0-chart.

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 'Lsθt in step 32.

Further, in step 33, the initial room temperature T0 is detected by the room temperature detection means 19 provided approximately at the center of the suction port 1o.

Then, when a preset time θ has elapsed, the room temperature T1 is detected again by the room temperature detection means 19 (step 34).

Then, in step 35, the chamber @T1 and the set temperature Tge
The heat load amount Δt is calculated from both of t and t using the following formula.

ΔT = Tset −T1 Then, the preset reference heat load amount Δt and the calculated heat load amount ΔT,7 are compared. Here, sugar loading amount Δ
When Tl is larger than the standard heat load amount Δt, that is, when the difference between the room temperature T1 and the set temperature Tset is large, proceed to the No side and increase the angle of the loopers 28 and 12b from the ceiling surface to blow diagonally downward. The louver is driven so that (step 36). On the other hand, if the difference between the room temperature T1 and the set temperature Tset is small, the process proceeds to step 3 on the YES side. In step 37, the initial room temperature T,
The temperature change rate ΔT is calculated using the following formula % based on the room temperature T1 after a certain period of time. Then, in step 38t1, a preset reference temperature change rate Δt is compared with the temperature change rate ΔT. Here, the temperature change rate ΔT is the reference temperature change rate Δt
In other words, when the chamber 14 is larger than the
If there is a large temperature change and the operation is in a transient operation period, proceed to the NO side and change the dampers s1a and s1b to the blowing angle switching means 2.
Based on rsa and 2tsb, it is determined that the air is blown diagonally downward (step 39). And blow-out angle switching means 25a.

25b, each damper 31a, 31b is set at a position with a large angle from the ceiling surface. As a result, the coils of the blow-off angle switching means 25&, 25b are not energized during start-up operation such as at the beginning of operation, or during operation under high load such as when there is a very large difference between the outside temperature and the room temperature. The air passage 29 is in a compressed state and is located at the solid line in Figure 2.
Since the air outlet 28a communicates with the diagonally downward outlet 28a, the temperature-controlled air can be blown directly into the living area as shown in FIG. 4, and the living area can quickly be brought close to the set temperature. When the temperature of the chamber 14 approaches the set temperature, the heat load amount B and the temperature change rate ΔT gradually become smaller, the heat load amount ΔT is smaller than the reference heat load amount Δt, and the temperature change rate ΔT is the reference value. It becomes smaller than the temperature change rate Δt. As a result, the answer in step 38 is YES, and the blowing angle switching means 25a is made of a coil made of an energized shape memory alloy.

26b is energized and the coil expands as shown by the broken line in FIG. 2 as the temperature rises, so the dampers 31a and 31b shield the obliquely downward air outlets 28a and 28b. Therefore, the heat-exchanged air flows through the horizontal outlet 27a.

2yb, and is blown out along the ceiling surface substantially horizontally (step 40). Then, the horizontal blowing state is maintained for a predetermined period of time by a blowing angle time integration means 24 consisting of a timer. Therefore, the blown air flows along the ceiling 4 as shown in FIG. 5 and hits the upper portions of the opposing side walls 15 and 16. For this reason, the colliding flow changes into a downward flow and flows downward along the side walls 15, 1θ. After reaching the floor 17, the air spreads across the floor 17 and is sucked in through the suction port 10 of the indoor unit 1, generating large circulation throughout the room 14. Therefore, strong winds do not occur in the living area, and it is possible to gently control the temperature from the surroundings of the room 14. After a certain period of time has elapsed, the supply of electricity to the coils of the blow-off angle switching means 25a, 2e; b is stopped, and the horizontal blow-off port 27a is shielded. For this reason, the blowing direction changes to diagonally downward blowing, and temperature-controlled air is sent directly into the living area. This diagonally downward blowing state is maintained for a certain period of time. After a certain period of time,
The indoor temperature change rate and heat load are determined again, and if both are small, the horizontal blowout and diagonal downward blowout are repeated alternately as described above. Therefore, while gently controlling the temperature from the surroundings of the room 14, the living area is also directly cooled and heated, resulting in a more comfortable space.

According to the above embodiment, when the difference between the room temperature and the set temperature is large and the indoor temperature change rate is large, such as at the beginning of operation, the blowing direction is directed diagonally downward to the floor surface, Temperature-controlled air is rapidly fed into the area and controlled so that the desired temperature is quickly reached. On the other hand, if the temperature of the chamber 14 approaches the set temperature and both the heat load ΔT and the temperature change rate ΔT become smaller than the reference values, the blowing direction is alternated between blowing horizontally to the ceiling and blowing diagonally downward. Control the speech bubbles so that they repeat. When a flow is generated along the ceiling surface for a certain period of time, the blown air flows along the ceiling surface, so the wind speed is difficult to decrease, and while controlling the temperature of the ceiling surface, it reaches the side wall 15. It flows downward along the line 16, passes through the floor surface 17, and is sucked into the suction port 10 of the indoor unit 1. As a result, large circulation occurs in the chamber 14 along the wall surface. In other words, when 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 outside. This prevents strong winds from reaching the living area, eliminating discomfort caused by the wind. Also, since the flow is along the wall, the airflow slows down and circulates reliably.

Especially during heating, high-temperature air tends to stay near the ceiling 4, wasting heat above the head.

By blowing off such high-temperature air with a horizontal blowout flow, it becomes possible to carry it into the living area.

After a certain period of time, the air blows out diagonally downward to directly control the temperature in the living area. This also sufficiently controls the temperature of the occupants directly below the indoor unit, providing an extremely high-quality comfortable space. can.

Furthermore, in this embodiment, a ceiling-embedded air conditioner is explained, but the present invention is applicable to an air conditioner in which the indoor unit is installed at a height of 1.8 m or more in a living area, that is, a ceiling-mounted type or a wall-mounted type. A similar effect can be obtained for air conditioners.

Effects of the Invention As is clear from the embodiments, the present invention provides a heat load amount determining means for determining the amount of indoor heat load using an indoor temperature detecting means and a set temperature detecting means, and a heat load amount determining means for determining the amount of indoor heat load by using the indoor temperature detecting means. The indoor temperature is detected at intervals, and the temperature change rate of the room is measured by the temperature change rate measuring means. When both the heat load amount and the temperature change rate are larger than preset values, the blowout angle switching means controls the blowout to diagonally downward. In the case of starting operation where the
By rapidly pumping temperature-controlled air into the living area,
Reach the desired temperature quickly.

Then, when the room temperature becomes stable and approaches the set temperature, and the rate of temperature change becomes small, horizontal blowing along the ceiling surface and diagonally downward blowing are alternately repeated for a certain period of time. When the air blows horizontally, the air blows along the ceiling surface, creating a horizontal air flow in the non-residential area near the ceiling, and generating a large convection flow along the ceiling walls and floor of the room. Therefore, the blown airflow does not directly hit the people in the living area, so there is no discomfort caused by the airflow. At this time, the temperature of the ceiling, walls, and floor is controlled at the same time, so cold radiation is emitted from these surfaces.

Discomfort due to warm radiation is also reduced. In addition, during heating, high-temperature air tends to accumulate near the ceiling, but horizontal blow-off allows the high-temperature air from the upper part to be carried into the living area, allowing for more effective heating.

After a certain period of time, the blow direction changes diagonally downward, blowing warm air directly into the living area, ensuring that the living area is maintained at the set temperature. In addition, since the horizontal and diagonal downward blows are repeated alternately, even people in the living area can feel the wind intermittently, and the temperature is controlled in a way that feels similar to natural wind, allowing for comfortable heating and cooling.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing an embodiment of the present invention, Fig. 2 is an enlarged view of the main parts of this embodiment, Fig. 3 is a flowchart showing an example of a program for determining the blowout angle, and Fig. 4 is a diagram showing an example of a program for determining the blowout angle. Figure 6 shows the indoor airflow during startup operation, Figure 6 shows the indoor airflow during stable operation (horizontal blowout), Figure 6 is a bottom view of a conventional air conditioner, and Figure 7 shows the above air conditioner. Central sectional view of
FIG. 8 is a diagram showing indoor airflow in a conventional example. 18... Indoor temperature setting means, 19...
Indoor temperature detection means, 20...control device, 21.
...Heat load amount determining means, 22...Temperature change rate measuring means, 23...Blowout angle determining means, 24
...Time control means, 26a, sb...
Blow angle switching means. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 zt 306 23 (Figure 3 Figure 4 Figure 6 Figure 7

Claims (2)

[Claims] (1) A heat load amount determining means for determining the indoor heat load amount based on the temperature output of the indoor temperature detecting means and the temperature output from the set temperature detecting means, the indoor temperature detecting means and the temperature detecting means temperature change rate measuring means that measures the amount of change in indoor temperature using the temperature detected by the input signal as an input signal; and a blowing angle judgment that determines the blowing angle based on output signals of both the temperature change rate measuring means and the heat load amount determining means. What is claimed is: 1. An air conditioner comprising: a blowing angle switching means for arbitrarily switching the blowing angle; and a blowing angle time control means. (2) Only when both the output signal from the temperature change rate measuring means and the output signal from the heat load amount determining means are smaller than a preset value, the time integrating means and the blowing angle switching means change the blowing angle to the ceiling. Claim 1, characterized by comprising a time control means for the blowing angle that alternately repeats substantially horizontal blowing along the surface and diagonally downward blowing.
Air conditioner as described in section.