JPS586345A - Temperature controlling device of 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 The present invention relates to an improvement of a temperature control device in an air conditioner equipped with a refrigeration cycle.

In recent years, there has been a global trend toward energy conservation, and naturally air conditioners have also become energy efficient. In terms of energy conservation, in air conditioners, we aim to achieve energy savings by improving the performance of individual equipment (for example, compressors and heat exchangers), and by achieving energy savings through the most efficient control throughout the entire period of cooling operation. There are two directions to achieve this.

Therefore, the present invention realizes energy saving through the most efficient operation control throughout the entire period of the latter cooling operation.

Conventionally, as shown in FIG. 4, a temperature control device for an air conditioner sets the temperature completely independently of the set air volume.

In other words, by operating the air volume selector switch 103 consisting of two selector switches 103a and 1031), the fan motor 1
Even if the rotational speed of No. 16 was changed and the set air volume was changed from a light breeze to a strong wind, the temperature setting did not change and was always constant. Therefore, since the speed of wind generated indoors differs between operating in a light wind and operating in a strong wind, the airflow has an effect on the human body's bodily sensation. Generally, the wind speed is higher in strong wind operation than in light wind operation, so your body heat is easily taken away and you feel colder. In this way, with conventional control methods, when the air volume is changed, the temperature setting remains constant, so there is a problem that it feels hot when operating with a light breeze and cold when operating with a strong wind, which results in unnecessary cooling operation, especially when operating with a strong wind. This was contrary to energy conservation.

The present invention eliminates the drawbacks found in these conventional temperature control devices for air conditioners.

Hereinafter, the present invention will be explained with reference to accompanying drawings showing one embodiment thereof.

In FIG. 1, 11 is a compressor, 12 is an outdoor heat exchanger, 13 is a capillary tube, 14 is an indoor heat exchanger,
Reference numeral 16 denotes an outdoor side blower, and 16 denotes an indoor side blower having at least two or more variable speed taps. These constitute an air conditioner equipped with a well-known refrigeration cycle. The operation of this refrigeration cycle has been well known for some time.
The explanation will be omitted.

Next, referring to FIG. 2, a description will be given of a comfort diagram in consideration of the airflow of the generally known P and OoFanger during summer cooling operation.

The horizontal axis Td is the indoor dry bulb temperature, and the vertical axis Tw is the indoor wet bulb temperature, and a relative humidity curve RH (%) on the right side is drawn by these Td and Tw. Further, a curve V descending to the right is a curve showing the wind speed of the indoor airflow, and within this range, the same level of comfort can be obtained. In addition, the air conditioner should be set to high, low, and breeze mode.
Corresponding to the wind speed in the comfort diagram shown in the figure, it is generally v-〇 when driving in strong winds. 6-1.0 m/sec (X area) 1
V-〇 during weak driving. 3 to 0°e (Y area), and about 0.15 to 0.3 (Z area) during light wind operation. Therefore, when the wind speed V is high (X region), the same comfort can be obtained even though the indoor dry bulb temperature T (i) is higher than when the wind speed V is low (Y and Z regions).

Based on the above-mentioned comfort diagram, a specific circuit of the temperature control device and its operation will be explained with reference to FIGS. 3a and 3b.

Here, as the cooling operation control, temperature control is performed by operating and stopping the compressor 11.

In FIG. 3B, R1 is a temperature-sensitive resistance element such as a thermistor for detecting the cooling load, and is connected in series with a series circuit consisting of a volume R2 for adjusting the suction temperature of the indoor heat exchanger 14. 1 is a comparator whose input terminal (10) is connected between the temperature-sensitive resistance element R1 and the temperature control volume R2, and the reference terminal (→) is connected between the series circuit of resistors R3 and R4. The output terminal of the comparator 1 is connected to the base terminal of the transistor Q1 via a diode D1. 2 is a relay coil connected to the collector terminal of the transistor Q1, and the contact 2a shown in FIG. Open and close to control the operation of the compressor 11. R5, R6
is a resistor for changing the set temperature by switching the contacts 3av 3b of the air volume changeover switch 3, and is connected in series between the temperature control volume R2 and the ground.

During strong wind operation, both contacts 3a and 3b are turned OFF; during weak wind operation, contact 3a is turned on and contact 3b is turned off; during light wind operation, both contacts 3a and 3b are turned on. Note that contacts 3a and 3b (l''j: are connected in parallel with resistor R5 and resistor R6, respectively. R7 is a resistor that creates ON and OFF points of the compressor 11 for temperature adjustment volume R2. It is connected in parallel between the input terminal (+) and the output terminal of comparator 1 via diode D2.R8 is a resistor for driving transistor Q1, and D3
is a diode connected in parallel with compressor relay 2 to prevent malfunction. 4 is a DC power supply.

The operation of the temperature control device using the above circuit configuration will be explained.

During strong wind operation, the contacts 3a and 3b of the air volume changeover switch 3 are in the ON state, and the indoor temperature setting is determined only by the resistance value of the temperature setting polycomb R2. and,
During low wind operation, only the contact 3a of the air volume selector switch 3 is in the ON state, the resistance value of the indoor temperature setting volume R2 and the series combined resistance value of the resistor R6 increases, and the input terminal voltage V (T) of the comparator 1 becomes As a result, the indoor temperature setting is lowered by the resistance R6. It's a trench, when driving in a breeze,
Contacts 3a and 3b of the air volume selector switch 3 are in the OFF state, and the indoor temperature is set using the temperature setting volume R2.
, and the series combined resistance value of resistors R5 and R6, the input terminal voltage (4) of comparator 1 becomes even higher, and the indoor temperature setting decreases by the amount of resistors R5 and R6. Here, if the change in room temperature setting corresponding to the change in wind speed is replaced with resistors R4 and R6, energy saving can be achieved without sacrificing comfort.As is clear from the above embodiment, the temperature control device according to the present invention By switching the air volume switching device, you can change the air volume of the indoor fan and also change the setting value of the temperature setting device, so you can finely adjust the temperature you feel when operating with strong winds and the temperature you feel when operating with gentle winds. ,
It not only maintains comfort by preventing the chilly weather that can be a problem when wind speeds are high, such as when driving in strong winds, but also has various advantages, such as being able to save energy by raising the set temperature.

[Brief explanation of the drawing]

FIG. 1 is a refrigeration cycle diagram of an air conditioner equipped with a temperature control device according to an embodiment of the present invention, FIG. 2 is a P.0.Fanger comfort diagram explaining the temperature control device, and FIG.
Figure & is an electric circuit diagram of the temperature control device, Figure 3 is an electric circuit diagram of the compressor and blower, and Figure 4 is an electric circuit 1-1 showing conventional air volume switching. 1... Comparator, 3... Wind @9J
J'A switch (air volume switching device), 11...
Compressor, 16... Indoor blower, R1...
...Temperature-sensitive resistance element (temperature detector), R2...Temperature setting volume (temperature setting device), R6/R6...
··resistance. Name of agent: Patent attorney Toshio Nakao and one other person (Aji Somi a H'ri)

Claims (2)

[Claims] (1) In an air conditioner having a refrigeration cycle consisting of a compressor, an indoor heat exchanger, a pressure reducer, and an outdoor heat exchanger, an indoor blower that sends air that has exchanged heat with the indoor heat exchanger indoors; , an air volume switching device that changes the rotational speed of the indoor fan to change the amount of air blown; a temperature detector that detects the load temperature state and outputs a signal to control the operation of the compressor; and a temperature sensor that sets the room temperature to a desired temperature. 1. A temperature control device for an air conditioner, comprising a temperature setting device, and a control circuit that changes a set value of the temperature setting device in response to air volume switching by the air volume switching device. (2) The temperature of the air conditioner according to claim 1, wherein the control circuit is a resistor that changes the voltage divided by the temperature setting device and the temperature detector according to the opening and closing of the contacts of the air volume switching device. Control device.