JPS618544A - Apparatus for controlling blower in air conditioner - Google Patents

Abstract

PURPOSE:To reduce a feeling of cold air when an operation of compressor is terminated during a heating operation by a method wherein a first and a second measuring means for stopping an operation of the blower after a specified time is elapsed from a stopped time of the compressor and reoperating the blower after a specified period of time is elapsed are arranged. CONSTITUTION:A suction air temperature sensor 3 may operate and terminate a compressor 10 in response to a suction temperature of air and at the same time when the compressor 10 is stopped, a measuring action of the first timer 8 and the second timer 9 is started. A setting time t1 of the first timer 8 is elapsed and a blowing temperature is decreased, resulting in that the air direction change-over vane 4 is directed upward, the blower 2 is stopped to operate and then the blower 2 is reenergized after a setting time t2 of the second timer 9 is elapsed. Further, when the time t4 is elapsed, it shows that a minimum stopped time t3 of the compressor 10 has been elapsed and as soon as the suction air temperature sensor 3 detects that a room temperature is lower than a set temperature, the compressor 10 is reenergized. In this case, a feeling of cold air is kept during a time of t5 and during this time the air direction changing vane 4 is directed upward, so that no high feeling of cold air is found. Only the blower 2 is continued to rotate until the room temperature is decreased down to a desired temperature after the time t3 is elapsed and no feeling of cold air is found due to a high room temperature.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a blower control device for an air conditioner for both heating and cooling purposes.

Configuration of the conventional example and its problems As is well known, the air conditioner for both cooling and heating according to the present invention generally has a refrigerant circuit in which a compressor, a four-way valve, a condenser, a pressure reducer, an evaporator, etc. are connected in a ring. It is used for both cooling and heating by switching the four-way valve and reversing the direction of refrigerant circulation.

During heating, indoor air is heated as it passes through the condenser and blown into the room by the blower. 1st
The figure shows the schematic structure of such a conventional general air conditioner, in which a suction temperature sensor (suction temperature detector) 3 is provided in front of a condenser (heat exchanger) 1. When the indoor temperature reaches the temperature set by the user or the built-in microcomputer, the suction temperature sensor 3 detects the temperature of the suction air and stops the compressor, and when the room temperature drops, the suction temperature sensor 3 detects this. Then run the compressor again to heat the room. Further, the blowing section is provided with a wind direction changing blade 4 and a blowing temperature sensor (blowout temperature sensor) 6, and when the blowing temperature sensor 5 detects that the temperature of the air blown into the room is high, the wind direction changing blade 4 is installed. The blowing air is directed downward, and when the blowing temperature sensor 6 detects that the temperature of the blowing air is low, the wind direction changing blade 4 is turned upward. As a result, low-density, high-temperature air is blown downward during heating, and high-density, low-temperature air is blown upward during cooling, or when the compressor is stopped, to achieve a good room temperature distribution. . In addition,
2 is a blower. However, as shown in the time chart in Figure 4, conventionally during heating with this type of air conditioner, if the suction temperature sensor 3 detects a high temperature and the compressor stops, the time until the next compressor operation is In addition to the room temperature decreasing during t3, low-temperature blown air that has not received condensation heat circulates in the room, resulting in a disadvantage that the user's perceived temperature significantly decreases. In addition, even if the blowing air is directed upward by the wind direction change blade 4 at this time so that the low temperature blowing air does not directly hit the user, the cold blowing air hits the ceiling or walls and generates an air current throughout the room. The feeling was unavoidable.

Therefore, as shown in FIG. 6, it was considered to stop the blower 2 while the compressor is stopped, but in this case, the airflow around the suction temperature sensor 3 disappears, and the suction temperature sensor 3
Even when the compressor is stopped, the high temperature of the air accumulated around the condenser 1 is sensed, so even though the room temperature has fallen, the compressor restarts operation is delayed, resulting in a significant drop in the room temperature, which can actually harm the user. often felt cold.

OBJECTS OF THE INVENTION The present invention solves the problems of the conventional example described above, and reduces the feeling of cold air when the compressor is stopped during heating in an air conditioner.

Composition of the Invention In order to achieve this object, the air blowing control device for an air conditioner of the present invention includes a blower that blows heat exchange air into the room by a heat exchanger that constitutes a refrigeration cycle together with a compressor, and a blower that controls the direction of the blowing air. A wind direction changing blade that changes up and down is provided, a suction temperature detector is provided on the upstream side of the heat exchanger to detect the air suction temperature and start and stop the compressor, and near the wind direction changing blade, a first timer that includes a blowout temperature detector that detects the blowout temperature of the air and operates the wind direction changing vane, and further stops the blower after a certain period of time has passed from the time when the compressor is stopped while the compressor is stopped; Similarly, a second timing means is provided for restarting the blower after a certain period of time has elapsed from the time when the compressor was stopped.

With this configuration, when the compressor is stopped, the blower is stopped after a certain period of time during which the blowout temperature has not dropped significantly, and then the blower is operated immediately before the next time when the compressor may be restarted to accurately measure the suction temperature sensor. The compressor can be restarted accurately by detecting the room temperature, thereby reducing the feeling of cold air.

DESCRIPTION OF EMBODIMENTS The present invention will be described below with reference to FIGS. 2 and 3 showing one embodiment thereof.

First, a blower control device (electric circuit) for an air conditioner according to the present invention will be explained with reference to FIG. 6 is a power supply, and a suction temperature detector 3 controls the operation and operation of the compressor 10 according to the air suction temperature.
At the same time, when the compressor 10 is stopped, the timer 9 of the first timer 8 and second timer 9 starts the blower 2 after the set time t2 has elapsed. Let it run again.

Next, normal heating operation will be explained with reference to FIG. First, while the suction temperature detector 3 detects that the room temperature is higher than the set temperature, the contacts 11, 12, and 13 are open, and the blower 2 and compressor 1o are stopped. When the suction temperature detector 3 detects that the room temperature has fallen below the set temperature, the contacts 11, 12, and 13 close, and the first timer 8 contact S
1 is closed, the blower 2 and the compressor 1o are in operation, and at the same time the first timer 8. The second timer 9 starts timing. When the first timer 8 measures the time t1, the contact S1 opens and the blower 2 stops, and when the second timer 9 measures the time t2, the contact S2 closes and the blower 2 restarts.

Generally, in this type of air conditioner, even if it is detected that the room temperature is lower than the set temperature while the compressor 10 is stopped, the difference between the discharge pressure and suction pressure of the compressor 1o is sufficiently small. In order to prevent restarting, there is a minimum stop time variation t3 of about 2 to 3 minutes. Further, there is a time delay t4 until the suction temperature detector 3 can detect the room temperature with sufficient accuracy after the blower 2 starts operating. Furthermore, compressor 10
After stopping, when the blowing temperature decreases, there is a time delay t6 at 1 in which this is detected and the wind direction changing blade 4 is turned upward. If t1≧16.12=13-14 is set here, the blower 2 will stop when the time t1 measured by the first timer 8 has elapsed, the blowout temperature has decreased slightly, and the wind direction changing blade 4 has turned upward, and then the blower 2 will stop. After the time t2 measured by the second timer 9 has elapsed, the blower 2 is restarted. Then, when the time t4 further passes after the blower 2 is restarted, the minimum stop time rII5t3 of the compressor 1Q has passed, and when the suction temperature detector 3 detects that the room temperature is below the set temperature, the compressor is immediately compressed. Machine 10 restarts. In this case, in a general environment, the room temperature is often already below the set temperature after time t3, so the feeling of cold air only occurs at time t.
6, and since the wind direction changing blade 4 is facing upward during this period, the feeling of cold air is not so strong. Further, if the room temperature is higher than the set temperature after time t3 has elapsed, only the blower 2 continues to run for a considerable period of time until the temperature drops to the set temperature, but in this case, since the room temperature is high, there is no such cold feeling.

Effects of the Invention As is clear from the above embodiments, the blower control device for an air conditioner of the present invention stops the blower for most of the time when the air blowing temperature is the lowest when the compressor is stopped during heating.
The blower is operated immediately before restarting the compressor to prevent a drop in room temperature due to a delay in restarting the compressor, while reducing the feeling of cold air.

[Brief explanation of the drawing]

FIG. 1 is a schematic sectional view of a general air conditioner according to the present invention, and FIG. 2 is an operation time chart of a blower control device for a conditioner according to an embodiment of the present invention. 1...Condenser (heat exchanger), 2...Blower, 3...Suction temperature detector, 4...Wind direction changing blade, 6... ... Blowout temperature detector, 6... Power source, 8... First time measuring means, 9... Second time measuring means, 10... Compressor. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 Figure 4

Claims (1)

[Claims] A blower blows heat exchanged air into the room by a heat exchanger that forms a refrigeration cycle together with a compressor, and a wind direction changing blade that changes the direction of the blowing air up and down. A suction temperature detector is provided to detect the temperature and operate/stop the compressor, and a blowout temperature detector is provided near the wind direction changing blade to detect the air blowing temperature and operate the wind direction changing blade. Furthermore, while the compressor is stopped, a first timer for stopping the blower after a certain period of time has elapsed from the time when the compressor is stopped; A blower control device for an air conditioner equipped with a timing means.