JPS58140542A - Controlling method of blowing operation of air conditioner - Google Patents

Abstract

PURPOSE:To prevent chilly air from being blown off, by operating a room-side blower when the difference between room temperature and the surface temperature of room-side heat exchanger reaches or exceeds a set point. CONSTITUTION:With the progress of time after an operating switch is closed, room temperature is detected by a first thermistor 11 under the control by a controller 10, while the temperature of a room-side heat exchanger 3 is detected by a second thermistor 12, and when the difference between the two temperatures reaches the set point, the controller 10 drives a fan motor 8 to start blowing off hot air. Accordingly, even when it is extremely cold, blow-off of air is not started before the room-side heat exchanger 3 is heated to such a temperature that blow-off air is free from chillness, so that chillness is not felt even when the blow-off air collides directly to the human body.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for controlling the blowing operation of an air conditioner, and one of its objects is to improve comfort by preventing cold air from blowing out when heating operation starts. be.

Conventionally, this type of blow-off control has been carried out by (1) measuring the time at the start of operation and blowing air after a certain period of time; (2) detecting the temperature of the indoor heat exchanger at the same time as the start of operation; A control method is known that starts blowing air two pages after the temperature reaches a set value.

In both cases, when the room temperature is relatively high during heating, you will feel warmth when the air starts blowing, but if the room temperature is quite low, you will not necessarily feel warmth. However, some improvement measures were required since the user sometimes experienced a feeling of cold air.

The present invention eliminates the drawbacks found in the conventional air blowing operation control method described above.The present invention will be explained below with reference to the attached drawings showing one embodiment of the present invention. The general structure of the cycle system will be explained. In the same figure, 1 is a compressor, 2 is a four-way switching valve, 3 is an indoor heat exchanger, 4 is a pressure reduction device, 5 is an outdoor heat exchanger,
A refrigeration cycle is constructed by connecting these in a ring. The indoor heat exchanger 3 and the outdoor heat exchanger 6 are each provided with a forced ventilation fan 6.7 and its motors 8, 9, respectively. The refrigerant from the compressor 1 flows as shown by the solid arrow when the four-way switching valve 2 is operated for cooling, and flows as shown by the broken arrow during heating. In addition,
In the figure, A indicates an indoor unit of a separate air conditioner. 1o is a control device that controls the operation of the seven-arm motor 8 on the indoor side, and includes a first thermistor 11 that detects the ambient temperature of the indoor heat exchanger 3 at the time of starting heating, and a first thermistor 11 that detects the ambient temperature of the indoor heat exchanger 3 when heating starts, and a first thermistor 11 that detects the ambient temperature of the indoor heat exchanger 3 when heating starts A signal from a second thermistor 12 that detects the temperature on the inlet side of the vessel 3 is inputted.

Next, a schematic electrical circuit of the air conditioner will be explained with reference to FIG. Here, the same parts as in Fig. 1 are given the same numbers and the explanation is omitted. In the figure, 13 is a power supply, 14 is an operation switch, 16
16 is a switch for controlling the operation of the indoor motor 8 by the control device 10; 17 is for controlling the operation of the compressor 1 by the control device 10 in the same way as the switch 16;
This is a thermo switch that controls the operation of the room, and is mainly used to control room temperature. Here, the control device 10 is composed of an electronic circuit including a microcomputer, and stores various modes for performing well-known air conditioning control.

In the above configuration, heating operation will be explained based on FIG. 3. Note that the cooling operation is a well-known mode and is not the subject of the present invention, so a description thereof will be omitted.

First, when the operation switch 14 is turned on, the compressor 1 is driven, and the refrigerant flows as shown by the broken line arrow in FIG. 1 by the operation of the four-way switching valve 2. At this time, the control device 1o
The thermistor 11 detects the room temperature, and at the same time the second thermistor 12 starts detecting the temperature of the indoor heat exchanger 3. At this time, the first thermistor 11
The temperature detected by the second thermistor 12 is T1, and the temperature detected by the second thermistor 12 is T2. But? Well, first. 2nd Ryosu ~ Mr. 11,. The detected temperature difference of 12' is the predetermined value ΔTl/1
Therefore, the indoor fan motor 8 is stopped.

And with the passage of time, the above-mentioned first. Second car? -Miss 11112 (7) Detected temperature difference T3-T2! >f%
/N6 page The controller 1o starts to drive the indoor fan motor 8 at the time t0 when the fixed value of 4 pages is reached, and the blowing of hot air is started.

Here, this predetermined value ΔT is selected to be a temperature that does not give a feeling of cold air at the start of blowing, and is changed depending on the indoor temperature before the start of operation.

That is, since the control device 10 calculates and selects it, it changes each time depending on the detected temperature at the start of operation.

Therefore, even if it is extremely cold, the air will not start blowing unless the indoor heat exchanger 3 is warmed to a temperature that does not give a feeling of cold air when blowing starts, so the blowing air will not directly hit the human body. It does not make you feel chilly even when you wear it, and it improves comfort. Furthermore, since the temperature of the hot air blown out is determined based on the air temperature at the start of operation, there is no possibility that chilly air will be blown out depending on the weather conditions.

Note that in this embodiment, the second thermistor 12
The temperature of the indoor heat exchanger 3 was detected using the refrigeration cycle pressure switch.

Even if the temperature is detected separately, this does not deviate from the gist of the present invention. Further, the predetermined value ΔT may not be set at a constant value of 6 pages, but may be a value obtained from an inverse proportional expression so that the value becomes smaller as the detection room temperature increases.

As is clear from the above embodiments, the method for controlling the blowing operation of an air conditioner according to the present invention includes a refrigeration cycle consisting of a compressor, a four-way switching valve, an indoor heat exchanger, a pressure reduction mechanism, and an outdoor heat exchanger. When starting heating operation with an air conditioner configured with The inner blower has a lotus-like design, and the outlet temperature is determined based on the indoor temperature at the start of heating operation, so even if the temperature of the indoor heat exchanger reaches a predetermined value, the room temperature remains extremely low. This has various advantages, such as the fact that the blown air does not make you feel chilly, it can always blow warm air that does not make you feel chilly according to the detected indoor temperature, and it improves comfort.

[Brief explanation of drawings]

FIG. 1 is a refrigeration cycle diagram of an air conditioner equipped with an air blowing operation control method according to an embodiment of the present invention, FIG. 2 is a schematic electrical circuit diagram of the air conditioner, and FIG. 3 is a diagram. FIG. 2 is an explanatory diagram showing the operating state of the indoor fan according to the same ventilation operation control method. 1... Compressor, 2... Four-way switching valve, 3
... Indoor heat exchanger, 4 ... Pressure reducing device, 6 ... Outdoor heat exchanger, 6 ... Fan, 8 ... ...Fan motor, 1o...Control device, 11...First thermistor, 12...
...Second thermistor. Name of agent: Patent attorney Toshio Nakao and 1 other person 2nd
figure

Claims (1)

[Claims] When configuring an air conditioner equipped with a refrigeration cycle consisting of a compressor, a four-way switching valve, an indoor heat exchanger, a pressure reducing mechanism, and an outdoor heat exchanger, and starting heating operation, after operating the compressor, A blower operation control method for an air conditioner that operates an indoor blower when the difference between the indoor air temperature and the surface temperature of an indoor heat exchanger reaches a set value or less.