JPH0387552A - High temperature air blow control method of air conditioner - Google Patents

Abstract

PURPOSE:To maintain high temperature air at a target temperature by a method wherein according to the high temperature air blow instruction, the frequency of an inverter is increased, the air flow of a room fan is reduced, the air flow of an outdoor fan is increased to blow out high temperature air, and the air flow of the room fan is controlled so as to maintain the target temperature. CONSTITUTION:The temperature of high temperature air detected by a blow air temperature sensor 14 is input to a comparator 31 to compare it with the target temperature input from a blow temperature setting device 32 and calculate the deviation between them. The deviation is input to a room fan rotating speed decision device 28 to decide the rotating speed of a room fan 11 corresponding to the output from a memory 33. The air flow rate Q1 of the room fan 11 corresponding to the target temperature Td is previously stored in the memory 33. The rotating speed decided by the room fan rotating speed decision device 28 is output to a variable speed motor 8 through an output device 30 to operate the room fan 11 at the decided rotating speed. At the rotating speed of the room fan 11 is controlled so as to keep the high temperature air at the target temperature, the high temperature air is maintained at the target temperature, for example, at 65 deg.C.

Description

[Detailed description of the invention] (Industrial application field) TECHNICAL FIELD The present invention relates to a method for controlling high-temperature air blowing from an air conditioner.

(Prior art and its problems) During heating operation of an air conditioner, it is sometimes desired to blow high-temperature air indoors.

Conventionally, when blowing out high-temperature air, the air volume of the indoor fan was lower than that during normal heating operation, but with this method, the temperature of the high-temperature air could not be increased, and the temperature of the high-temperature air could not be set to the target temperature. The problem was that it could not be maintained.

(Means for Solving the Problems) The present invention was invented to solve the above problems, and the gist thereof is to provide an inverter-driven compressor, an indoor fan driven by a variable speed motor, and an indoor fan driven by a variable speed motor. In an air conditioner equipped with an outdoor fan, a high temperature air blowing command increases the frequency of the inverter, reduces the air volume of the indoor fan, and increases the air volume of the outdoor fan to blow out high temperature air. A method for controlling a high temperature air blower for an air conditioner, characterized in that the air volume of the indoor fan is controlled so that the temperature of the high temperature air becomes a target temperature.

(Function) In the present invention, by outputting a high-temperature air blowing command, the frequency of the inverter is increased, the air volume of the indoor fan is reduced, and the air volume of the outdoor fan is increased. It can be blown out. By controlling the air volume of the indoor fan, the temperature of this high-temperature air can be maintained at the target temperature.

(Example) Hereinafter, a detailed explanation will be given with reference to an example shown in the drawings.

A system diagram is shown in FIG.

During cooling operation, the refrigerant gas discharged from the inverter drive pressure II unit 1 passes through the four-way switching valve 2 and enters the outdoor heat exchanger 3, as shown by the solid arrow, where it enters the outdoor heat exchanger 3 driven by the variable speed motor 9. The refrigerant liquid is condensed and liquefied by dissipating heat from the outside air blown by the fan 10.Next, this refrigerant liquid enters the electronic expansion valve 4, where it is throttled to reduce the pressure, and then enters the indoor heat exchanger 5, where it is By variable speed motor 8! %! The indoor air blown by the indoor fan 11 is cooled to evaporate and vaporize.
Next, this refrigerant gas passes through the four-way switching valve 2 and the achievator 6 and returns to the inverter-driven compressor 1.

During TL operation, the refrigerant flows through the inverter-driven compressor 1, four-way switching valve 2, indoor heat exchanger 5, electronic expansion valve 4, outdoor heat exchange 2S3, four-way switching valve 2, and accumulator 6, as shown by the broken line arrows. Cycle in this order.

Each input from the remote controller 13, the indoor temperature detected by the room temperature sensor 7, the outlet air temperature detected by the outlet air temperature sensor 14, etc. are input to the control device 20 built into the main body of the air conditioner. Commands from the control device 20 are output to the compressor driving inverter 12, variable speed motors 8 and 9, and the like.

A control block diagram of the control device 20 is shown in FIG.

The room temperature detected by the room temperature sensor 7 is input to the comparison means 21 of the control device 20, where it is compared with the set temperature input from the room temperature setting device 22 to calculate the deviation between the two. This deviation is input manually to the frequency determining means 23, where the frequency is determined according to the input from the storage means 24. Note that the storage means 24 stores a predetermined frequency corresponding to the deviation. The determined frequency is output to the inverter 12 via the output means 25, where the frequency of the current supplied to the pressure ml1l is changed to the determined frequency. As a result, the capacity of the pressure mal changes.

During heating operation, when the high temperature air blowing button 26 provided on the remote controller 13 is operated, a signal from this is outputted to the frequency determining means 23, the outdoor fan rotation speed determining means 27, and the indoor fan rotation speed determining means 28. On the other hand, the outdoor fan rotation speed determining means 27 determines to increase the rotation speed of the outdoor fan 10, and this determination is outputted to the variable speed motor 9 via the output means 29, so that the outdoor fan IO rotates at high speed. In addition, the indoor fan rotation speed determining means 2B determines to reduce the rotation speed of the indoor fan 11, and this determination is output to the variable speed motor 8 via the output means 30, so that the indoor fan 11 rotates at a low speed. Thus, hot air is blown into the room.

When the high temperature air blowing button 26 is turned OFF, the inverter 1
2 frequency, the rotation speed of the outdoor fan 10, and the indoor fan 1
The rotation speed of 1 returns to that during normal heating operation.

When high-temperature air is blown out, the temperature of the high-temperature air detected by the blow-out air temperature sensor 14 is input to the comparison means 31, where it is compared to the target temperature input from the blow-out temperature setting device 32 (for example,
65°C) and the deviation between the two is calculated. This deviation is input to the indoor fan rotation speed determination means 28, where the rotation speed of the indoor fan 11 is determined according to the human power from the storage means 33. As shown in FIG. 3, the storage means 33 has the following information:
Wind of the indoor fan 11 corresponding to the target temperature ↑d it ct
+ is predetermined and stored. Note that the rotation speed of the indoor fan 11 can also be determined by PID controlling this deviation. The rotation speed determined by the indoor fan rotation speed determination means 28 is outputted to the variable speed motor 8 via the output means 30, and the indoor fan 11 rotates at the determined rotation speed.

In order to blow out high-temperature air, it is necessary to increase the temperature of the indoor heat exchanger 5, that is, the condensation temperature of the refrigerant, and for this purpose, it is necessary to increase the discharge pressure saturation temperature (DST) of the compressor 1. .

As shown in FIG. 4, this DST increases as the frequency of the inverter 12 increases, as shown in FIG. 5, it decreases as the air volume of the indoor fan 11 increases, and as shown in FIG. As such, it increases as the air volume of the outdoor fan IO increases. As shown in FIG. 7, the temperature of the blown air increases as the DST increases, but decreases as the air volume of the indoor fan 11 increases.

In this way, the frequency of the inverter 12 is increased, the air volume of the outdoor fan 10 is increased, and the air volume of the indoor fan 11 is increased.
Since the DST can be increased by reducing the air volume, the temperature of the high-temperature air can be increased.

Since the rotation speed of the indoor fan 11 is controlled so that the temperature of this high temperature air becomes the target temperature, the temperature of the high temperature air can be maintained at the target temperature, for example, 65°C.

In the above embodiment, the temperature of the hot air is detected by the outlet air temperature sensor 14, but as shown in FIG. Instead, a sensor that detects the temperature of the indoor heat exchanger 5 can be used.

(Effects of the Invention) In the present invention, by outputting a high temperature air blowing command, the frequency of the inverter is increased, the air volume of the indoor fan is reduced, and the air volume of the outdoor fan is increased. can be blown out. By controlling the air volume of the indoor fan, the temperature of this high-temperature air can be maintained at the target temperature.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, FIG. 1 is a system diagram, and FIG. 2 is a system diagram.
The figure is a control diagram of the control device, Figure 3 is a line diagram showing the relationship between high temperature air temperature and indoor fan air volume, Figure 4 is a line diagram showing the relationship between inverter frequency and DST, and Figure 5 is a line diagram showing the relationship between the inverter frequency and DST. is a diagram showing the relationship between the air volume of an indoor fan and DST, Figure 6 is a diagram showing the relationship between the air volume of an outdoor fan and DST, and Figure 7 is a diagram showing the relationship between the air volume of an outdoor fan and DST.
The figure is a diagram showing the relationship between DST, the temperature of the blown air, and the air volume of the indoor fan, and FIG. 8 is a diagram showing the relationship between DST and the temperature of the indoor heat exchanger.

Claims (1)

[Claims] In an air conditioner equipped with an inverter-driven compressor, and an indoor fan and an outdoor fan driven by a variable speed motor, the frequency of the inverter is increased and the air volume of the indoor fan is reduced by a high-temperature air blowing command, and A high temperature air blowing control method for an air conditioner, characterized in that high temperature air is blown by increasing the air volume of the outdoor fan, and the air volume of the indoor fan is controlled so that the temperature of the high temperature air becomes a target temperature.