JPH0384351A - Controlling method for air conditioner - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (A) Industrial Application Field The present invention relates to a control method for controlling the angle of a wind direction changing plate that changes the discharge air of conditioned air.

(b) Prior Art A prior art technique for controlling a wind direction control plate for adjusting the direction of air discharged from an air conditioner is the one described in Japanese Utility Model Publication No. 61-23240. This publication describes a structure in which a user can easily select from a plurality of windings by operating a switch or the like.

Problems to be Solved by the Invention In the conventional device configured as described above, the user had to select the swinging operation, concentrated operation, and diffused operation according to the driving condition. Therefore, for example, if you perform this concentrated operation when heating with low-temperature hot air, the wind speed will increase and you will feel a cold air feeling.If you perform a diffusion operation at the start of heating, the temperature of the hot air blown out will decrease and you will also feel the cold air. In order to obtain comfortable air conditioning, the user must frequently switch between oscillating, diffuse, and concentrated operations according to the air conditioner's operating status.

In order to solve these problems, the present invention provides a control method that can always provide optimum wind direction control in accordance with the operating conditions of the air conditioner.

(d) Means for Solving the Problems The present invention constructs a refrigeration cycle by connecting a compressor, an indoor heat exchanger, a pressure reducing device, and an outdoor heat exchanger in a ring shape with refrigerant piping, and also provides an indoor heat exchanger. An air conditioner that has a discharge port that blows out air that has been heat exchanged in a chamber toward a room to be conditioned, and a plurality of wind direction changing plates that are provided at the discharge port and arbitrarily change the direction of the discharged air. The plurality of wind direction changing plates are automatically switched between an angle where the wind direction changing plate becomes tapered along the flow of the discharged air and an angle where the wind direction change plate becomes tapered along the flow of the discharged air based on the operating state of the ,
When the temperature of the indoor heat exchanger is below a predetermined temperature, the angle of the plurality of wind direction changing plates is set to an angle where the tip becomes thicker along the flow of discharged air, and the temperature setting value of the air conditioner is set. When is set to a specific value, the angle of the plurality of wind direction changing plates is set to an angle that becomes thicker along the flow of discharged air, and the operating capacity of the compressor is adjusted to its maximum capacity by the temperature control unit. When set, the plurality of wind direction changing plates are set at an angle such that they become tapered along the flow of discharged air.

(E) Function When using the air conditioner control method configured as described above, the wind direction is controlled so that the optimum wind direction is obtained depending on the operating status of the air conditioner, the temperature of the indoor heat exchanger, the room temperature setting value, etc. The angle of the change plate can be changed automatically.

(F> Example) Examples of the present invention will be described below based on the drawings. Fig. 1 is a sectional view showing the internal state of an indoor unit of an air conditioner. In this figure, 1 is an indoor unit; It houses an indoor heat exchanger 2 and an indoor blower 3.The indoor heat exchanger 2 constitutes a refrigeration cycle together with a compressor (compression capacity can be changed depending on the rotation speed), a pressure reduction device, and an outdoor heat exchanger. When this indoor heat exchanger 2 acts as an evaporator, cooling operation of the conditioned room becomes possible, and when this indoor side heat exchanger 2 acts as a condenser, cooling operation of the conditioned room becomes possible. heating operation is possible.This switching requires 4 steps.
You can use a dialect.

The indoor blower is a three-discharge centrifugal blower type fan. By operating this blower, the air in the room to be conditioned is sucked in from the suction port 4 as shown by the solid line arrow, and then cooled or heated by the indoor heat exchanger and replaced. , and is again blown out from the outlet 5 into the chamber to be conditioned.

Reference numeral 6.7 indicates a wind direction changing plate whose horizontal angle can be changed, and the angle of each plate can be changed by rotation of a step motor. 8 is a wind direction changing plate whose vertical angle can be changed, and the angle can be changed manually.

In addition, 9 is an exterior body of this indoor unit, and 1O is a drain pan, which is arranged below the indoor heat exchanger. 11
is an air filter, which is housed on the back side of the suction port 4. 12 is an air purifier, which is housed between the air filter 11 and the indoor heat exchanger 2.

Reference numeral 13 denotes a temperature detector, which detects the temperature of the indoor heat exchanger 2.

FIG. 2 is an electrical circuit diagram for controlling the air conditioner shown in 1130. FIG. In this figure, 14 is a micro blower processor that controls the operation of the indoor unit, and 15 is a switch section, which is comprised of a power switch, a power select switch that determines the upper limit of overcurrent protection, a trial run switch, etc. This switch section 15
is addressed to the microprocessor by a scan operation of the microprocessor 14. 16
1 is a detection section, which converts detected values such as room temperature and humidity into A/D (analog/digital) and then inputs them to the microprocessor. Note that the temperature of the indoor heat exchanger 2 detected by the temperature detector 13 is also processed by the microprocessor 14 after A/D conversion.

17 is a fan motor that drives the indoor blower 3; 18.1
Reference numerals 9 denote step motors for determining the angles of the wind direction changing plates 6 and 7, respectively. The rotation speed of the fan motor 17 is controlled by a rotation speed control section 20 . Examples of this control method include, for AC motors, phase control by feeding back the number of revolutions, frequency control by changing the frequency of applied AC, and for DC motors, methods such as control of applied voltage. The rotation of the step motors 18 and 19 is controlled by pulse control units 21 and 22, and this control method is as follows.
A four-phase current control system is used.

The operating step range of this step motor is 0 to 200 steps.

Reference numeral 23 denotes an infrared signal receiving section, which receives the signal sent from the remote controller 24, converts it into a pulse train, and outputs it to the microprocessor. The remote controller 24 generates signals for controlling the operation of the air conditioner, signals for starting/stopping, signals for switching between cooling/warming/dehumidifying modes, and signals for automatically switching the air flow rate of the indoor blower and setting it to strong wind/medium wind/weak wind. , time signal during timer operation, function A,
After modulating with carrier waves such as B and C signals (functions A, B, and C will be described later), the signals are output as infrared rays. The microprocessor 14 controls the operation of equipment such as motors and compressors based on this signal.

A signal line 25 connects the microprocessor 14 of the indoor unit 1 and the microprocessor 27 of the outdoor unit so that signals can be exchanged. 28 is a compressor;
29 is a fan motor for an outdoor blower. Compressor 28
The rotation speed (ability) is controlled by the speed control section 30. This speed control section 28 controls the rotation speed of the compressor using a PWM method. The output frequency is set by a signal provided by microprocessor 27. The rotation speed of the fan motor 29 is controlled by a speed control section 31. In addition to the same function as the rotation speed control section 20, this rotation speed control method may utilize an intermediate tap of the stator winding to switch the speed.

FIG. 3 is a front view schematically showing the indoor unit 1 shown in FIG. 1. In this figure, the wind direction changing plates 6 and 7 are provided with step motors 1B and 19, respectively, as shown in the figure. By rotating the step motors 18 and 19, the horizontal angles of the wind direction changing plates 6 and 7 can be changed.

FIG. 4 is a partial sectional view of the vicinity of the discharge port 5 of the indoor unit shown in FIG. 3. In this state, the angle of the wind direction changing plates 6 and 7 is Oo.

5 to 15 are partial cross-sectional views showing the angles of the wind direction changing plates 6 and 7. FIG. The wind direction changing plates 6 and 7 are controlled by a signal from the microprocessor 14 so that they are at a predetermined angle. That is, pulse trains are set in the pulse motors 8 and 19 in the forward rotation direction until the wind direction changing plates 6 and 7 reach a desired rotation angle.

FIG. 5 is a diagram showing the state of the air direction changing plate of function A during cooling operation. The wind direction changing plate 6 is rotated 135° clockwise from the 0° position, and the wind direction changing plate 7 is rotated 118° clockwise from the 0° position. That is, the wind direction changing plate 6 has an angle α downward with respect to the horizontal line H, and the wind direction changing plate 7 has an angle β downward with respect to the horizontal line H.

Therefore, the wind direction changing plate 6 and the wind direction changing plate 7 are in a state where the ends thereof become thicker by 7=15°11 along the flow of the discharged air discharged from the discharge port 5.

FIG. 6 is a diagram showing the state of the wind direction changing plate of function A during heating operation. The wind direction changing plate 6 and the wind direction changing plate 7 form the discharge port 5.
This shows a state in which the tip becomes thicker by 7=35'' along the flow of the discharged air discharged from the air.

FIG. 7 is a diagram showing the state of the air direction changing plate of function B during cooling operation. The wind direction changing plate 6 is rotated 93° clockwise from the Oo position, and the wind direction changing plate 7 is rotated 60° counterclockwise from the 0° position. That is, the wind direction changing plate 6 has an angle α downward with respect to the horizontal line H, and the wind direction changing plate 7 has an angle β downward with respect to the horizontal line H. Therefore, the wind direction changing plate 6 and the wind direction changing plate 7 are in a tapered state of 7=27° along the flow of the discharged air discharged from the discharge port 5.

FIG. 7 is a diagram showing the state of the wind direction changing plate of function B during heating operation. The wind direction changing plate 6 and the wind direction changing plate 7 form the discharge port 5.
2 shows a state in which the air is tapered at 7=60° along the flow of the discharged air discharged from the 2.

This figure shows the change in the state of the wind direction changing plates 6 and 7 when they are simultaneously swung along the flow of air with the tip being widened at 7=5°. This change in wind direction change plate 6.7 is the 9th change.
The state shown in the figure→the state shown in FIG. 10→the state shown in FIG. 11→the state shown in FIG. 10→the state shown in FIG. 9→the state shown in FIG. 10...・It changes sequentially in the order of .

FIGS. 12 to 15 are diagrams showing the state of the wind direction changing plate of function C during heating operation. Wind direction changing board 6 and wind direction changing board 7
7 along the flow of discharged air discharged from the discharge port 5.
This figure shows the change in the state of the wind direction changing plates 6 and 7 when they are simultaneously swung while maintaining the tip width of =5°.

This change in the wind direction changing plates 6 and 7 is shown in Fig. 12→
The state shown in Fig. 13 → the state shown in Fig. 14 → the 15th
The state shown in the figure→the state shown in FIG. 14→the state shown in FIG. 13→the state shown in FIG. 12→the state shown in FIG. 12→the state shown in FIG. 13...・It changes sequentially in the order of .

Swing states shown in Figures 9 to 11 and Figures 12 to 12
The swing state shown in FIG. 15 differs in that the direction of the air discharged from the discharge port 5 is upward and downward.

The operating conditions in which the wind direction changing plates 6 and 7 are set in this manner will be described below.

First, function A starts operating when the microprocessor 14 receives a function A signal from the remote controller. First, the room temperature setting value is set to 30±2° during cooling operation and 10° ± 2° during heating operation, the fan motor 17 of the indoor blower 3 is set to a low rotational speed, and the operating capacity of the compressor 28 is reduced. It is set to ability. Therefore, when this function A is performed, the conditioned air discharged from the discharge port 5 of the indoor unit 1 is discharged widely in the discharge direction at a weak wind speed. During heating operation, low-temperature air is discharged in this way, so the feeling of cold air can be eliminated despite the low-temperature warm air. In addition, since conditioned air is discharged over a wide range during both cooling and heating operations, the air in the conditioned room can be circulated well even in weak winds, and the set temperature and the temperature in the conditioned room can be adjusted. Air conditioning can be kept comfortable when the conditions match.

Moreover, this function A operates automatically when the temperature of the indoor heat exchanger 2 is below a predetermined value. That is, when the microprocessor 14 determines that the temperature detected by the temperature detector 13 is below a predetermined temperature (a temperature at which the user cannot obtain hot air that makes the user feel warm), the microprocessor 1
4 automatically sets the state of function A. This state occurs, for example, when the temperature of the indoor heat exchanger has not yet warmed up sufficiently at the start of heating operation, or when the compressor is stopped due to the thermostat being turned off.

The operation of function A by the microprocessor 14 is canceled when the temperature detected by the temperature detector 13 is several degrees higher than the predetermined temperature.

15 Function B is such that the microprocessor 14 is set to the remote controller number, the operating capacity of the compressor 28 is set to the maximum capacity, and the room temperature set value is ignored. Therefore, when performing this function B, the discharge port 5 of the indoor unit 1
The conditioned air discharged from the outlet is concentratedly discharged in the discharge direction. During heating operation, high-temperature air is discharged in a concentrated manner by operating at maximum capacity and with weak wind, allowing you to feel a concentrated sense of heating when starting the heating when returning home in the winter. . Further, even during cooling operation, it is possible to similarly obtain an intensive feeling of cooling.

This function B is canceled after a predetermined period of time has elapsed since the start of the function B's operation, or by a predetermined release operation.

Note that after this function B is completed, the operation of the compressor is limited to the minimum capacity and maintained for a certain period of time.

Function C begins operating when microprocessor 14 receives a function C signal from remote controller 16-controller.

FIG. 16 shows the flow route when the microprocessor 14 performs the above operations. First, in step S1, startup processing such as initial setting is performed. Then step S2
At the microprocessor 14, data such as temperature detected by each detector, infrared signal from a remote controller, etc. are input and stored and maintained in the microprocessor 14. Next, the process proceeds to step S3, and based on these data, constants such as cooling/heating, operating capacity of the compressor, air volume setting of the indoor blower, and angle of the wind direction changing plate are set. The following steps correct this constant. In step S4, it is determined whether the operation mode is cooling or heating. In the case of heating operation, the process proceeds to step S5 and it is determined whether the temperature of the indoor heat exchanger 2 is equal to or higher than a predetermined value. When the conditions in step S5 are met, the process advances to step S6 to set function A (constants indicating the angle of the wind direction change plate so that the wind direction change plate 6.7 is in the state shown in FIGS. 5 and 6, etc.) Correct each constant so that Thereafter, the process proceeds to step S12, where operation is performed based on these corrected constants. Further, in step S7, it is determined whether or not data for performing the operation of function A has been input, and if there is a setting for function A, the process advances to step S6.

Next, in step S8, if there is a setting for function B, as in step S7, the process proceeds to step S9, and each constant is corrected so that it becomes the setting for function B, as in step S6. Further, in step 810, it is determined whether or not function C is set. When the function C is set, the process advances to step S11, and each constant is corrected so that the function B is set.

(G) Effects of the Invention As described above, when the control method of the present invention is used, an air conditioner in which a plurality of wind direction changing plates for changing the direction of the discharged air are provided at the discharge port for discharging conditioned air. The angle control of the change plate can be automatically changed between an angle that tapers along the flow of discharged air and an angle that tapers along the flow of discharged air, based on the operating status of the air conditioner. Therefore, the discharged air can be concentrated and diffused as necessary, and comfortable air conditioning suitable for the use can be achieved.

Also, when the temperature of the indoor heat exchanger is below a predetermined value,
Since the wind direction changing plate becomes thicker and can diffuse the discharged air, the feeling of cold air when the temperature of the discharged air is still low during heating operation can be alleviated.

In addition, when the air conditioner's temperature set point is set to a specific value, the wind direction change plate becomes thicker at the tip and can diffuse the discharged air, so even in weak winds, the air in the conditioned room can be circulated. It is possible to ensure good air conditioning.

Furthermore, when the operating capacity of the compressor is set to its maximum, the wind direction changing plate becomes tapered and the discharged air can be concentrated, making it possible to centrally cool and heat a predetermined area. be.

[Brief explanation of drawings]

Figure 1 is a sectional view showing the internal state of the indoor unit of the air conditioner, Figure 2 is an electric circuit diagram for control used in the air conditioner shown in Figure 1, and Figure 3 is the same as shown in Figure 1. FIG. 4 is a partial cross-sectional view of the indoor unit near the discharge port shown in FIG. 3, and FIGS. 5 to 15 are partial cross-sectional views showing the state of the wind direction change plate. 16 is a flowchart showing the operation of the microprocessor shown in FIG. 2. 1... Indoor unit, 2... Indoor heat exchanger, 5
...Discharge port, 6,7...Wind direction change plate.

Claims (4)

[Claims] (1) A compressor, an indoor heat exchanger, a pressure reducer, and an outdoor heat exchanger are connected in a ring with refrigerant piping to form a refrigeration cycle, and the air that has been heat exchanged in the indoor heat exchanger is In an air conditioner that has a discharge port that blows out toward a conditioning room, and a plurality of wind direction changing plates that are provided at the discharge port and arbitrarily change the direction of the discharged air, the plurality of wind directions can be changed based on the operating state of the air conditioner. A control method for an air conditioner, characterized in that a change plate is automatically switched between an angle where the change plate becomes tapered along the flow of discharged air and an angle where the change plate becomes tapered along the flow of discharged air. (2) A compressor, an indoor heat exchanger, a pressure reducer, and an outdoor heat exchanger are connected in a ring with refrigerant piping to form a refrigeration cycle for heating operation. In an air conditioner having a discharge port that blows air toward a room to be conditioned, and a plurality of wind direction changing plates provided at the discharge port to arbitrarily change the wind direction of the discharged air, the temperature of the indoor heat exchanger is set to a predetermined temperature. A method for controlling an air conditioner, characterized in that the angle of the plurality of wind direction changing plates is set to an angle that becomes thicker toward the tip along the flow of discharge air when the temperature is lower than or equal to . (3) Temperature control that connects the compressor, indoor heat exchanger, pressure reducer, and outdoor heat exchanger in a ring with refrigerant piping to form a refrigeration cycle, and controls the operation of the compressor based on the temperature set value. a discharge port which blows out the air heat-exchanged in the indoor heat exchanger toward the conditioned room, and a plurality of wind direction changing plates provided at the discharge port to arbitrarily change the direction of the discharged air. In the air conditioner, the angle of the plurality of wind direction changing plates is set to an angle that becomes thicker toward the tip along the flow of discharge air when the temperature setting value of the air conditioner is set to a specific value. How to control an air conditioner. (4) Temperature control that connects the compressor, indoor heat exchanger, pressure reduction device, and outdoor heat exchanger in a ring with refrigerant piping to form a refrigeration cycle, and controls the operation of the compressor based on the temperature setting value. a discharge port which blows out the air heat-exchanged in the indoor heat exchanger toward the conditioned room, and a plurality of wind direction changing plates provided at the discharge port to arbitrarily change the direction of the discharged air. In the air conditioner, when the operating capacity of the compressor is set to the maximum capacity by the temperature control section, the plurality of wind direction changing plates are set at an angle such that they become tapered along the flow of discharge air. Characteristic air conditioner control method.