JPS61243242A - Control of ventilation of air-conditioning machine - Google Patents

Abstract

PURPOSE:To permit continuous room heating operation for a long period of time compared with conventional air-conditioning machine and obtain the effect of electric power saving by a method wherein an outdoor fan is operated an stopped periodically in the room heating operation when room temperature has arrived at a set temperature. CONSTITUTION:When the room heating operation is started, an operation mode is decided at first by the output of a temperature detecting unit 17 and the outputs of a set temperature switching switch 15 as well as a set value switching unit 16 whether it is on room heating mode or not, subsequently, an outdoor temperature is decided whether it is higher than a given temperature or not. In case these two conditions are satisfied, the control process of soft heating, which controls the ON-OFF of the outdoor fan is started comes. In the control process of ON-OFF of the soft heating, an indoor ran 3 is operated by a driving unit 19 when the temperature detecting unit 17 has detected that the room temperature has arrived at a set temperature A and the ON time DELTAt as well as the OFF time DELTAt' of the outdoor fan 1 are produced by a time memory unit 20. According to this constitution 1 are produced by a time memory unit 20. According to this constitution, the room heating operation is effected until the room temperature arrives at another set temperature B.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method for controlling air blowing of an air conditioner.

BACKGROUND OF THE INVENTION Conventional air blowing control for air conditioners includes, for example, opening/closing 60 degrees.
As described in Publication No. 44746, the indoor blower is operated at high and low speeds, or the outdoor blower is controlled to control the pressure rise on the high pressure side during heating operation under overload conditions. It is known that by detecting the temperature, the system turns off when the temperature exceeds a set value.

Problems to be Solved by the Invention However, with this method, the blower and compressor must be turned on and off frequently during heating operation under overload conditions. Technology has been developed to minimize ON-OFF operations by converting the operating frequency of the blower, thereby stabilizing the outlet temperature of the indoor blower and achieving comfortable and economical operation. Repeated ON-OFF operations of the blower have disadvantages in terms of economy and comfort.

Therefore, the present invention solves the above-mentioned conventional drawbacks by periodically turning the outdoor fan on and off during heating operation when the outdoor temperature exceeds a certain temperature or during overload heating operation. The aim is to be able to operate continuously for longer periods of time than conventional models, and to also achieve power saving effects.

Means for Solving the Problems In order to achieve the above object, the present invention provides an air conditioner body equipped with a compressor, an indoor blower, and an outdoor blower whose air volume can be switched on and off. A power switch that energizes the indoor blower, a drive device that operates the blower, a switch control device that switches between the compressor, the indoor blower, and the outdoor blower, and a switching device that switches the input of the outdoor blower between running and stopping. A temperature detection device for detecting indoor temperature is provided, and the outdoor blower is periodically operated and stopped when the indoor temperature reaches a set temperature during heating operation.

For production The effect of this technical means is as follows.

In other words, during overload heating operation, by operating the compressor at a low frequency and periodically turning the outdoor fan on and off, the amount of heat absorbed by the outdoor heat exchanger is reduced and air at the appropriate temperature is delivered indoors. It is possible to save power by keeping the operating current to a minimum.

EXAMPLE Hereinafter, an example of the present invention will be described based on the accompanying drawings.

First, a schematic electric circuit will be explained with reference to FIG.

In the figure, reference numeral 11 denotes a power source, to which an outdoor blower motor 1, a compressor 2, and an indoor blower motor 3 are connected in parallel via a power switch 12, respectively. The outdoor blower motor 1 is equipped with an ON terminal 4 and a FF terminal 5t, and is connected to a switching terminal 7 to perform ○N-FFFi. Reference numeral 14 denotes a transformer rectifier that generates a DC voltage from the power source 11 to serve as a power source for the blower control device 10, and has a well-known structure. Numerals 8 and 9 are actuators for operating the power switch 12 and the switching terminal 7, respectively.

Next, the configuration of the ventilation control device 10 will be explained with reference to FIG.

In the figure, the air blow control device 10 includes a temperature detection device 17, a determination device 18 that compares the output of the temperature detection device 17 with the set temperature of the set value switching device 16, and outputs the result to the switch control device 13; It is comprised of a drive device 19 that inputs the output and controls the indoor blower motor 3 and compressor 2 from ON to FF.

On the other hand, for the outdoor side as well, the output from the switch control device 13 is periodically turned on and off by the time storage device 20, and the output from the outdoor blower motor 1'1O is output through the drive device 21.
N-OFF control.

When the set temperature changeover switch 15 is turned on, the time from that point is recorded in the timer, and when the set time has elapsed, a signal is sent to the setting changeover device 16 to change the steam setpoint temperature, which outputs it to the determination device 18 to determine the temperature. A determination is made between the output from the detection device 17 and the determination device 18, and the result is output from the switch control device 13.

In the above configuration, the operation when heating operation is fully started is as follows.
The third flowchart of signal processing will be explained based on FIG.

Output from temperature detection device 17 and set temperature selector switch 1
5. Based on the output from the set value switching device 16, first it is determined whether the mode is heating mode, and then it is determined whether the outdoor temperature is above a certain temperature. When these two conditions are met, a control process for a mode (hereinafter referred to as soft heating) for controlling ON/OFF of the outdoor fan is entered.

The ON-OFF control process for soft heating starts with ON-O.
Generates a numerical value for the FF time (Δt to Δt), sets the numerical value to the soft heating timer, and outputs a command signal to the drive device 21 to stop if the outdoor blower 1 was in operation last time, and to operate if it was in a stopped state. The outdoor fan 1 is then periodically turned on and off by the signal. This operation is repeated until the indoor temperature reaches the set temperature.

FIG. 5 shows the operating status of the outdoor blower 1 and the indoor blower 3. When the total temperature detection device 17 detects that the indoor temperature has reached the set temperature A, the indoor blower 3 is activated by the drive device 1.
9, and the outdoor blower 1 is also operated by the time storage device 20.
Accordingly, the ON time Δt.

An OFF time Δt is generated. As a result, the above-described control processing is performed until the indoor temperature reaches the set temperature B.

A comparison of the performance with and without the soft heating air blowing control during the heating operation will be explained with reference to the Mollier diagram shown in FIG.

If no control is performed, the refrigerant is sucked into the compressor 2 in the state d and is discharged in the state E'. Next, the refrigerant is cooled in the indoor heat exchanger, becomes F, is depressurized in the pressure reducer, enters the outdoor heat exchanger in the state C, and returns to the compressor 2 in the state d.
Return to At this time, the amount of heat absorbed by the outdoor heat exchanger is d, and the compressor discharge temperature is T1.

On the other hand, when the soft heating control is performed, DE
It is represented by FC, the amount of heat absorbed by the outdoor heat exchanger is represented by Q, and the compressor discharge temperature is represented by T2. As a result, the discharge temperature can be lowered by ΔT.

Therefore, when performing a heating operation for a long time in an overloaded state, the heating operation can be performed with less increase in the discharge temperature, and it is possible to maintain the indoor air outlet temperature constant for a long time.

Effects of the Invention As is clear from the above embodiments, the present invention reduces the amount of heat absorbed by the outdoor heat exchanger during heating operation and prevents the rise in discharge temperature by periodically controlling the operation of the outdoor blower on and off. By reducing the amount as much as possible to lengthen the continuous operation time of the compressor during overload, a continuous heating effect can be obtained with a moderate capacity.

[Brief explanation of drawings]

Fig. 1 is a schematic electrical circuit diagram of an air conditioner according to an embodiment of the present invention, Fig. 2 is a block circuit diagram of an air blow control device in the air conditioner, and Figs. 3 and 4 are signals for air blow control. FIG. 5 is an explanatory diagram showing the operating state of the air conditioner, and FIG. 6 is a Mollier diagram showing the control according to the present invention. 1, '-0, outdoor blower motor, 2...compressor, 3...indoor blower motor, 4...
ON terminal, 5...OFF terminal, 17...
・Temperature detection device, 18... Determination device, 13...
...Switch control device, 15... Setting temperature changeover switch, 16 ... Setting value changeover device, 19
... Drive device, 2o... Time storage device. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 3
Figure 4 Figure 5

Claims (1)

[Claims] An air conditioner body equipped with a compressor, an indoor blower, and an outdoor blower whose air volume can be switched on and off; a power switch for energizing the compressor, the outdoor blower, and the indoor blower;
A drive device for operating the blower; a switch control device for switching between the compressor, indoor blower, and outdoor blower; switching means for switching input of the outdoor blower between operation and stop; and a temperature detection device for detecting indoor temperature. A method for controlling air blowing of an air conditioner, wherein the outdoor blower is periodically operated and stopped when the indoor temperature reaches a set temperature during heating operation.