JPH0313753A - Controlling method for air conditioner - Google Patents

Abstract

PURPOSE:To achieve more comfortable air conditioning by a method wherein when capacity operation of a compressor is continued in a specified state for a given time, based on a detecting discharge temperature, capacity of a compressor and drive of a moving louver are controlled. CONSTITUTION:When, for example, a temperature difference T between an indoor temperature Ta and a set temperature Ts is between T1 and T2, operation of a compres sor 5 is continued at an operation frequency F2 for a specified time, and a discharge temperature Tf of indoor blast is decreased to a value lower than a set temperature t1, through control of the operation frequency of the compressor 5, the operation frequency is decreased to F1 being one stage lower. When a moving louver 10 is stopped, control through which the louver is driven is effected. Namely, an air flow responding to the temperature difference T is automatically set, and when capacity operation of the compressor 5 is continued in a specified state for a given time, control of capacity of the compressor 5 and control of automatic drive of the moving louver 10 are performed by means of the discharge temperature Tf. This method prevents cold air from being discharged in succession in a specified direction for a long time to prevent the occurrence of overcooling and production of an uncomfortable feeling, and enables execution of more comfortable air conditioning.

Description

[Detailed Description of the Invention] [Objective of the Invention] (Industrial Application Field) The present invention provides a method for controlling an air conditioner, in particular, detects the temperature of the indoor air outlet, and controls the indoor air outlet temperature based on the detected outlet temperature. The present invention relates to a method for controlling an air conditioner.

(Prior Art) Conventionally, as shown in FIG. 4, an air conditioner for cooling and heating has been constructed by sequentially connecting an outdoor heat exchanger 1, a capillary for cooling and heating 2, and an outdoor heat exchanger 3. The open side of 1.3 is connected to a variable capacity compressor 5 through a four-way valve 4, and by switching the four-way valve 4, the refrigerant is circulated as shown by the solid line arrow during cooling, and as shown by the broken line arrow during heating. It is generally known that the system is made to circulate.

As shown in FIG. 5, this indoor heat exchanger 3 is housed inside a casing 6 having a U-shaped cross section with an open front.
A freely rotatable cross-flow fan 7 is disposed at the rear and lower part of the indoor heat exchanger 3, and is located below the cross-flow fan 7 at the lower part of the casing 6, with the front opening end serving as an air outlet 8. A blowout passage 9 was provided, and a movable louver 10 rotatable in the vertical direction for changing the direction of air blowing into the room was provided inside the blowout passage 9.

Then, the control of the air conditioner detects the indoor temperature,
The temperature difference between this detected temperature and a preset temperature set by the user is determined, and the capacity of the compressor 5 is controlled by changing the operating frequency according to this temperature difference. This was generally achieved by manual on-off control such as a switch.

(Problem to be solved by the invention) However, in the above conventional example, especially when the indoor temperature is set to be low, such as during cooling operation, the compressor operates in accordance with the load, and the blowing temperature is low. If the movable louver remains facing in a certain direction, the user who is directly exposed to the blowing air may become too cold and feel uncomfortable. There were some problems.

The present invention was made in consideration of the above-mentioned circumstances, and the present invention detects the outlet temperature of indoor air and controls the indoor air based on this detected temperature, thereby achieving more comfortable air conditioning. The purpose is to provide a control method for a harmonizer.

[Structure of the invention]

(Means for Solving the Problems) In order to achieve the above object, a method for controlling an air conditioner according to the present invention sequentially connects an outdoor heat exchanger, a variable capacity compressor, and an outdoor heat exchanger, and In a control method for an air conditioner in which a heat exchanger is housed in a casing provided with a blowout passage, and a movable louver is rotatably arranged in the blowout passage to change the direction of indoor air blowing, the indoor temperature and indoor air blowing can be controlled. The blowout temperature is detected separately, and the capacity is controlled by changing the operating frequency of the compressor based on the temperature difference between the set temperature and the detected indoor temperature, and the capacity operation of the compressor is maintained at a constant state for a predetermined period of time. At times, the capacity of the compressor and the drive of the movable louver are controlled based on the detected blowout temperature.

(Function) According to the present invention having the above configuration, by controlling the capacity by changing the operating frequency of the compressor based on the temperature difference between the set temperature and the detected indoor temperature, the air volume is automatically set according to this temperature difference. In addition, when the compressor continues to operate at a constant capacity for a predetermined period of time, the compressor capacity is controlled and the movable louvers are automatically controlled based on the detected blow-off temperature. It is possible to prevent air from being continuously blown towards the air, eliminate excessive cold and discomfort, and achieve more comfortable air conditioning.

(Example) Embodiments of the present invention will be described below with reference to the drawings.

Similar to the above conventional example, the air conditioner is mainly composed of an outdoor heat exchanger 1, a capillary for heating and cooling 2, an outdoor heat exchanger 3, a four-way valve 4, and a compressor 5 with variable capacity. and,
The indoor heat exchanger 3 is housed inside a casing 6 having a U-shaped cross section, and a rotatable cross-flow fan 7 is disposed at the lower rear of the indoor heat exchanger 3. Further, in the lower part of this casing 6, there is provided a blowout passage 9 whose front opening end is a blowout port 8, and inside this blowout passage 9,
A movable louver 10 is provided that can freely rotate in the vertical direction to change the direction of indoor air blowing.

Furthermore, as shown in FIG. 1, this air conditioner is equipped with an indoor temperature sensor 1 for detecting the indoor temperature and an outlet temperature sensor 2 for detecting the outlet temperature of indoor air. The detection signal from ゜12 is CPU1
3 will be done manually.

This blowout temperature sensor 2 is attached to the blowout portion of the blowout passage 9.

The CPU 13 outputs an output to the inverter controller 14 to change the operating frequency of the compressor 5, and outputs an output to the louver drive unit 15 to drive the movable louver 10.

Figure 2 shows the pressure S caused by the temperature difference T (T-T-T) between the indoor temperature T detected by the indoor temperature sensor 1 and the set temperature T preset by the user.
a A diagram showing allocation of operating frequencies F4 to Fo of the S compressor 5.

That is, when the temperature difference T between the set temperature T and the indoor temperature T during cooling is greater than or equal to T (for example, T3-3°C), the operating frequency F4 (for example, F
-60H2), and this temperature difference T is
and T (e.g., T2-2℃), the operating frequency F3 (e.g., F
-50H2), the compressor 5 is operated at this temperature, the difference T is T
and T (e.g., Tl-1°C), the operating frequency F2 (e.g., F
-40H2), and this temperature difference T is T1
When the operating frequency F (
For example, if the compressor 5 is operated at F -30H2), and the temperature difference T is negative (indoor temperature T
is below the set temperature T), a
The compressor 50 is stopped at the operating frequency F CF -0H2). Then, when the indoor temperature T rises and the temperature difference T from the set temperature T becomes T1 or more, the compressor 5 is operated at the operating frequency F1, and the operating frequency is sequentially increased as the indoor temperature rises in the same way as above. The compressor 5 is set to operate with the

FIG. 3 is a diagram showing the drive control state of the movable louver 10 depending on the difference in the air outlet temperature Tr detected by the air outlet temperature sensor 1.

That is, the set temperature 11 (e.g., tt -13°C) and F2 (e.g., F2 - 15°C) are set in advance, and the set temperature t, F2, and blowing temperature T determine the blowing temperature under certain conditions. If the movable louver 10 is stopped when Tr becomes lower than the set temperature 11, it is driven, and when the blowout temperature Tr gradually rises to the set temperature 12 or higher, the movable louver 10 is activated before being controlled. By stopping the louver drive unit 15 in the state of
It is like automatic on-off control.

For example, when the temperature difference T between the room temperature T and the set temperature TS is between Tl and T2 (T-T1 to T2), the compressor 5 is operated at the operating frequency -F2 for a certain period of time. If the operation continues and the indoor air blowing temperature Tr becomes lower than the set temperature t1, the operating frequency of the compressor 5 is controlled to lower it to Fl, which is one step lower, and if the movable louver 10 is stopped, performs control to drive this.

Then, when the indoor air outlet temperature gradually rises and becomes higher than the set temperature t2, the above control is released and the original state is restored.
That is, the operating frequency of the compressor 5 is returned to F2, which is one step higher, and the control of the movable louver 10 is released to stop it.

As a result, the air volume is automatically set according to the temperature difference T, and when the capacity operation of the compressor 5 continues for a predetermined period in a constant state, the capacity of the compressor 5 is controlled and the movable louver 10 is automatically controlled based on the blowing temperature T. By performing precise drive control,
It is possible to prevent cold air from continuing to be blown in a certain direction for a long time, eliminate excessive cold and discomfort, and achieve more comfortable air conditioning.

〔Effect of the invention〕

Since the present invention has the above-described configuration, by detecting the indoor air outlet temperature and controlling the air conditioner based on the detected indoor air outlet temperature, the present invention eliminates the discomfort caused by the cold air from the indoor air outlet. This has the effect of making the environment more comfortable for residents by reducing the chances of cold air hitting the human body directly.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing an embodiment of the present invention, Fig. 2 is a graph showing the assignment of the operating frequency of the compressor according to the difference between the room temperature and the set temperature, and Fig. 3 is the control state of the movable louver according to the blowout temperature. 4 is a system diagram of an air conditioner, and FIG. 5 is a cross-sectional view of a casing housing an indoor heat exchanger. 1... Outdoor heat exchanger, 3... Indoor heat exchanger, 5...
・Compressor, 8...Blowout port, 9...Blowout passage, 1
0...nJ moving louver, 11...Indoor temperature sensor, 1
2...Blowout temperature sensor, 13...CPU, 14.
... Inverter controller, 15... Louver drive unit.

Claims (1)

[Claims] An outdoor heat exchanger, a compressor with variable capacity, and an outdoor heat exchanger are sequentially connected, the indoor heat exchanger is housed in a casing provided with a blowout passage, and a movable louver is installed in the blowout passage to change the direction of indoor air. In a control method for an air conditioner in which the compressor is rotatably arranged, the indoor temperature and indoor air outlet temperature are detected separately, and the operating frequency of the compressor is changed based on the temperature difference between the set temperature and the detected indoor temperature. The compressor is characterized in that the capacity of the compressor is controlled and the drive of the movable louver is controlled based on the detected blowout temperature when the capacity of the compressor continues to operate in a constant state for a predetermined period of time. How to control an air conditioner.