JPS6160333B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a dehumidifying mechanism for an air conditioner.

[Conventional technology]

Conventional dehumidification mechanisms use two indoor heat exchangers of air conditioners.
It had a layered structure, one was used as a cooler and the other was used as a condenser, and indoor air was blown into the room to cool it and reheat it, keeping the temperature constant and dehumidifying it.

FIG. 7 is an electric circuit diagram showing a conventional air conditioner control device disclosed in, for example, Japanese Utility Model Application Publication No. 55-87444, in which 2 is a power supply, 3 is an indoor thermostat for controlling the compressor 10 on and off. 9 is a fan motor (shown as one for convenience). However, power supply 2
Before the branch point of the circuit from to the fan motor 9 and compressor 10, there is a timer contact 11 that controls turning on and off of the fan motor 9 and compressor 10.
act directly on the fan motor 9 and act on the compressor 3 through a side path 12 to the indoor thermostat 3, which is provided with a normally open electromagnetic switch contact, and close the contact 13. Therefore, regardless of the indoor thermostat 3, the fan motor 9 and the compressor 10 are controlled to be turned on and off at the same time, and the side path 14 is provided with a normally closed electromagnetic switch contact 13 for the timer contact. form,
Normally, the contacts 11 are short-circuited to disable on/off control, so that only the compressor 10 is controlled on/off by the indoor thermostat 3.

The timer motor 15 that operates the timer contact 11 and the electromagnetic switch coil 16 that operates the electromagnetic switch contacts 3' and 13 are connected to the operation selector switch 8 along with the compressor 10 and fan motor 9.
It is designed to be operated selectively in several combinations.

Further, FIG. 8 is a schematic electrical circuit diagram of a second conventional dehumidifying device for an air conditioner disclosed in, for example, Japanese Utility Model Application Publication No. 55-59240, and the electrical circuit according to FIG. 8 will be explained.

In the figure, 15 is a timer whose contacts are turned on and off intermittently by the rotation of a motor, etc., 8 is a dehumidification switch, and 8 is an air conditioner switch interlocked with the dehumidification switch 8.

[Problem that the invention seeks to solve]

In the conventional device configured in this way,
When dehumidifying operation is used, the blower is controlled only by turning on and off at set times using a timer motor, regardless of the indoor thermostat, and weak cooling is performed intermittently, which poses the problem of not being able to perform detailed dehumidification control. It was hot.

This invention was made to solve the above-mentioned problems, and instead of using the conventional mechanism, the indoor side has a single-layer structure with only a cooler, and the air passing through the indoor cooler is compressed. The purpose of this is to provide a mechanism that dehumidifies the room by detecting a sudden change in room temperature while the machine is on, and only reducing the room temperature within a range that does not impair comfort.

[Means for solving problems]

This invention provides means for rapidly changing the indoor air flow rate in multiple cycles during compressor operation, storing the initial indoor temperature at the time of dehumidifying operation start operation, and selectively fixing the compressor operating rate based on this indoor temperature value. It is something.

[Effect]

The dehumidification control device according to the present invention stores the initial room temperature at the time of the dehumidification operation start operation in the microcomputer,
The compressor operating rate is selected and fixed based on this indoor temperature value, and the indoor air flow rate is programmed to be rapidly changed in multiple cycles while the compressor is operating, thereby controlling finely tuned dehumidification operation.

[Embodiments of the invention]

The embodiments shown in FIGS. 1 to 6 will be described in detail below. 1 is an optically insulated semiconductor relay that combines a bidirectional semiconductor switching device 1b such as a triac and an insulated signal transmission device 1a such as a light emitting diode.
PHOT SSR (hereinafter referred to as PHOT SSR).
4 is a relay contact for switching the wind speed of the indoor blower, and 9 is an indoor blower motor.

These PHOT SSR1, wind speed switching relay contact 4
The blower motor 9 is connected in series to the AC power source 2, and the compressor motor opening/closing relay contact 3 and the compressor motor 10 are connected in parallel thereto.

Next, as a control system on the low power side, explained with reference to FIG. and is configured to send a signal to the input circuit 62 together with the input switch 8 for switching between cooling mode and dehumidification mode. An output circuit 65 is provided for outputting a signal from a memory 64 or the like for selectively fixing. This output circuit 65 is the PHOT SSR
Insulated signal transmission element 1a such as a light emitting diode in 1
is output to the output buffer 7. This output buffer 7 consists of resistors 72 and 74 and transistors 71 and 7.
3, which are connected to the compressor motor opening/closing coil 3' and the indoor fan motor coil 4', respectively, and configured to receive respective signals from the output circuit 65 of the microcomputer 6, and furthermore, the microcomputer 6 is insulated while the compressor 3 is ON. The signal transmission element 1a is connected to output from the output circuit 65 so that the blower 4 is repeatedly turned on and off in multiple cycles.

Hereinafter, the effects of the present invention will be explained in detail.

For example, when the mode selector switch 8 is ON, the microcomputer 6 detects the difference between the temperature detected by the indoor temperature detection element 5 and the indoor temperature setting volume 11, and when the indoor temperature is higher, the microcomputer 6 selects the insulated signal transmission element 1 such as a light emitting diode.
Turn on a and compressor relay 3. Normal cooling is then performed.

Here, when the mode changeover switch 8 is changed from ON to OFF, the microcomputer 6 memorizes the room temperature at the initial stage of this mode operation changeover operation, and thereafter, for example,
As shown in the figure, the operating rate of the compressor is selected based on the value of the initial room temperature, and the compressor is repeatedly turned on and off at that operating rate.

In other words, the microcomputer 6 turns on and off the compressor relay 3 depending on the operating rate as shown in the graph of Figure 3.
is output to buffer 7 repeatedly.

While the compressor is ON at this time, the microcomputer 6 outputs an output to the insulated signal transmission element 1a such as a light emitting diode so that it is repeatedly turned ON and OFF in multiple cycles within the compressor ON time. Specifically, the compressor is turned on for 3 minutes at an initial indoor air temperature of 25℃, then turned off for 3 minutes.
Repeatedly at a 50% operating rate, the insulated signal transmission element 1a such as a light emitting diode is connected for 10 seconds while the compressor is ON.
The microcomputer 6 controls the power to turn off and turn on for 20 seconds.

Further, when the initial indoor air temperature is, for example, 28° C., the temperature load is high, so the program of the microcomputer 6 is configured to select the operating rate at, for example, 60%.

With the above-mentioned control, when the compressor is ON, the surface of the indoor cooler fin is turned on, and when the insulated signal transmission element 1a, such as a light emitting diode, is ON, the tri-attack 1b operates the indoor blower to blow indoor air through the cooler fin. By ventilation, the temperature approaches the indoor temperature, and while the insulated signal transmission element 1a such as a light emitting diode is OFF, the indoor blower is stopped and the compressor is ON, so the temperature rapidly drops due to the cooling effect of the refrigerant. This temperature rise and fall on the surface of the indoor cooler fins promotes dew condensation on the surface of the cooler fins of the indoor air passing therethrough, thereby making it possible to dehumidify the indoor air.

Remembering the indoor air temperature at the start of dehumidification operation and selecting the compressor operating rate means that at the start of operation, the indoor air temperature is almost the same as the outdoor air temperature, and therefore the outdoor air temperature load is This is the same as determining the operating rate depending on the state.

Furthermore, by operating the compressor at a fixed operating rate, considering the relative relationship between the cooler and the condenser in the refrigerant circuit, the dehumidification operation according to the present invention is ultimately stabilized according to changes in the outdoor air temperature. It is possible to have an effect of following the outdoor temperature by linking the indoor air temperature.

Ideally, the indoor air temperature could change according to the outside temperature and dehumidify, creating a comfortable dehumidifying space that would detect the outside temperature with a thermistor and follow the outside temperature without having to set the room temperature. be able to.

FIG. 2 is a graph showing the temperature and humidity of indoor air obtained by the present invention over time from the start of operation. In the figure, A is a progress graph of indoor humidity, and 21 is outdoor air humidity. 22 is an indoor humidity curve obtained by dehumidifying operation according to the present invention. B is a graph of the indoor and outdoor air temperature over the course of a day and night during the rainy season in Japan, 23 is the outdoor air temperature, and 24 is the indoor air temperature curve during the main dehumidification operation. 25 (due to the above-mentioned indoor blower control), the air conditioner is slightly cooled to a temperature slightly lower than the room temperature at the beginning of operation, but it is at a level that does not impair comfort, and since the compressor operation rate is a constant rate, the outdoor air temperature The air temperature will be followed at a relatively constant ratio.

Figure 5 shows the fixed memory inside the microcomputer 6 of the present invention.
It is a program flow diagram stored in ROM.

When the dehumidification notch (electronics dry) shown in FIG. 4 is switched to the indoor air temperature detection element 5 as an input, the initial room temperature is set to 27° C. or higher, for example, through a command 51 that detects and stores the initial room temperature at that time. There are instructions 53 and 54 that branch off from the instruction 52 that determines whether the compressor operation rate is 50% or 60%, and set the time corresponding to 50% and 60% of the compressor operating rate in the G counter.

Furthermore, it branches according to an instruction to determine whether the G counter is up. When the G counter is up, the compressor 10 and indoor blower 9 are
The program is configured to pass through the instruction 57 to turn OFF, turn on the compressor 10 while the G counter is counting, and pass the instruction 56 to control the dehumidification control operation of the indoor blower 9 described above. In the figure, G and F←1 represent the setting of instruction branching flags, and G and F←0 represent a reset. Also, G.F.
=1 is a command for setting the timer counter only once under each setting condition. Further, G counter 1 indicates that each counter is decremented by 1 every loop of the program to form a subtraction timer.

〔Effect of the invention〕

As described above, according to the present invention, an air conditioner having a refrigerant circuit that performs a cooling cycle and a semiconductor logic control LSI such as a one-chip microcomputer is a means for rapidly changing the indoor air flow rate in multiple cycles while the compressor is ON. In addition, the system memorizes the initial indoor air temperature at the time of the dehumidification operation start operation and selects and fixes the compressor operation rate based on the initial indoor air temperature value, which eliminates the need for conventional dehumidifiers due to the refrigerant circuit dedicated to cooling. This is highly effective in that it provides a low-cost air conditioner that eliminates the two-layer structure of a solenoid valve and a heat exchanger, and also provides an air conditioner that can easily carry out detailed dehumidification operation.

[Brief explanation of the drawing]

Fig. 1 is an electric circuit block diagram showing the dehumidification control device for an air conditioner according to the present invention, Fig. 2 is an explanatory diagram showing the time course of the temperature and humidity of indoor air according to the invention, and Fig. 3 is a diagram showing the change in compressor operating rate. An explanatory diagram showing the relationship between the indoor temperature at the initial stage of the dehumidification operation, FIG. 4 is a perspective view of the remote control body, FIG. 5 is a program flow diagram of the present invention, and FIG. 6 is a detailed diagram of the electric circuit block diagram of FIG. 1. , FIG. 7 is an electric circuit diagram of a conventional control device, and FIG. 8 is a second conventional electric circuit. In the diagram, 1 is an optically insulated semiconductor relay PHOT
SSR, 2 is the power supply, 6 is the microcomputer, 6
4 is a memory, 65 is an output circuit, and 7 is an output buffer.

Claims (1)

[Claims] 1. In an air conditioner that has a refrigerant circuit that performs a cooling cycle and a semiconductor logic control LSI such as a one-chip microcomputer, the air conditioner has a means for rapidly changing the indoor air flow rate in multiple cycles while the compressor is ON, and
1. A dehumidification control device for an air conditioner, comprising means for storing an initial indoor air temperature at the time of a dehumidifying operation start operation and selecting and fixing a compressor operating rate based on the initial indoor air temperature value.