JPH062914A - Air conditioning device - Google Patents

Abstract

PURPOSE:To provide an air conditioning device which is capable of minimizing upper and lower differential room temperatures and hence reduce the feeling of discomfort. CONSTITUTION:There is provided a control device 4 which controls the operation of an air conditioning device, maintaining the drive of a fan 3 in such a fashion that the capacity of room temperature with heat exchange may be changed and halted by providing an indoor heat exchanger 2 which heat- exchanges an indoor air, the fan 3 which supplies the air, a thermistor 5 which detects the room temperature at an indoor high spot, a thermistor 10 which detects the room temperature in a lower spot and comparing the room temperatures detected by the thermistors 5 and 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner for cooling and heating indoor air for home use, business use, etc. by directly heating and cooling it.

[0002]

2. Description of the Related Art Conventionally, for example, a room temperature control method for an air conditioner for heating and cooling indoor air used for home use by directly heating and cooling, detects the intake air temperature,
The cooling / heating capacity of the air conditioner is controlled so that the temperature becomes a set value. In addition, such an air conditioner is often a wall-mounted type, and since the indoor unit is attached near the ceiling of the room wall surface, the room temperature control is performed by sensing only the air temperature near the ceiling.

[0003]

However, in such a conventional air conditioner, especially during heating, temperature stratification is formed due to a difference in air density, so that low temperature air stays downward and high temperature air stays upward, so that room temperature of room temperature is high. There was a large difference between the upper and lower temperatures. Figure 3 shows the measurement result of (air temperature of 10 cm above the floor-air temperature of 230 cm above the floor) when heating was performed with a conventional air conditioner, and the value increased with time and reached 8.6 ° C in 1 hour.
There was a temperature difference between the top and bottom of For this reason, the air temperature near the feet is low even though the room temperature has reached the set room temperature, which often causes discomfort. Further, if the set room temperature is raised in order to increase the air temperature near the feet, the room temperature near the head becomes even higher, which is also uncomfortable.

The present invention has been made in consideration of the above-mentioned conventional problems,
It is an object of the present invention to provide an air conditioner that can reduce uncomfortable feeling by reducing the temperature difference between room temperature and room temperature.

[0005]

SUMMARY OF THE INVENTION The present invention is directed to a temperature control means for controlling the temperature of the room air, a blowing means for blowing the temperature-controlled air, and a room temperature at a predetermined high place in the room. First room temperature detecting means for detecting the room temperature, and second room temperature detecting means for detecting the room temperature in a place lower than a predetermined high place,
The comparing means for comparing the room temperatures detected by the first room temperature detecting means and the second room temperature detecting means, and the capacity of the temperature adjusting means while maintaining the operation of the air blowing means according to the comparison result of the two room temperatures. Alternatively, it is an air conditioner provided with a control means for controlling so as to stop.

[0006]

According to the present invention, the first room temperature detecting means detects the room temperature at a predetermined high place in the room, the second room temperature detecting means detects the room temperature at a lower place than the high predetermined place, and the comparing means detects the first room temperature. And comparing the room temperatures detected by the second room temperature detecting means and the control means so as to change or stop the capacity of the temperature adjusting means while maintaining the operation of the air blowing means in accordance with the comparison result of the two room temperatures. It controls the temperature adjusting means and the blowing means.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings showing its embodiments.

FIG. 1 is a block diagram of a heat pump type air conditioner according to an embodiment of the present invention. That is, the heat pump type air conditioner (hereinafter referred to as a heat pump type air conditioner) is composed of the indoor unit 1 installed on the upper side of the indoor wall 12 and the outdoor unit 6 installed outdoors.

On the other hand, the indoor unit 1 has an indoor heat exchanger 2 for directly heating or cooling the indoor air, a fan 3 for circulating and blowing the heated or cooled indoor air, and a control device 4 for controlling the air conditioner. Etc. The control device 4 is composed of control means (not shown) for controlling the compressor 8, fan 3 and the like, and comparison means (not shown) for comparing the temperature difference. Thermistor 5 which is the first room temperature detecting means for detecting room temperature
(For example, it is installed on the floor 230 cm) and the thermistor 10 (for example, installed on the floor 10 cm) which is the second room temperature detecting means for detecting the room temperature of the lower room is connected.

The other outdoor unit 6 is an outdoor heat exchanger 7 for radiating heat to the outside air or taking in the heat of the outside air, a compressor 8 for compressing the refrigerant, and an expansion valve 9 for adjusting the flow rate of the refrigerant. Etc. The control device 4 and the compressor 8 provided on the indoor unit 1 side are connected by a control line 11.

Next, the operation of the above embodiment will be described.

First, for example, when the heating operation is started, the refrigerant is compressed by the compressor 8, and the compressed refrigerant is sent to the indoor heat exchanger 2, where the condensation heat is dissipated to heat the indoor air. The refrigerant cooled by exchanging heat with the indoor air is sent to the outdoor unit 6 side, decompressed by the expansion valve 9 and sent to the outdoor heat exchanger 7, where it evaporates and takes in heat from the outside air.
The refrigerant that has exchanged heat with the outside air is compressed again by the compressor 8. The above cycle is repeated to perform the heating operation.

On the other hand, during the heating operation, the thermistors 5, 10
The room temperature of the indoor upper layer and the room temperature of the indoor lower layer are detected by the above, and the room temperature is compared by the comparison means of the control device 4 (wherein generally, the air with a high temperature rises upward and the air with a low temperature falls below. Since it descends, it is considered that the temperature difference between the room upper room temperature and the room lower room temperature is near the maximum temperature difference in the room). After the heating operation, when the temperature difference becomes equal to or more than the preset temperature difference as a result of the comparison, the control means of the control device 4 stops the operation of the compressor 8 and continues the operation of the fan 3 alone. Then, since the indoor air is mixed without being heated, the indoor air is agitated and the temperature difference becomes smaller (see FIG. 2). After that, when the temperature difference falls below a certain value, the operation of the compressor 8 is restarted. By repeating such an operation, it becomes possible to prevent the temperature difference between the upper and lower sides of the room temperature from exceeding the set temperature difference.

FIG. 2 is a measurement result of the time change of the temperature difference (upper and lower temperature difference) detected by the thermistors 5 and 10 when heating operation is performed by the heat pump type cooling and heating apparatus of the present invention.

Although there is no difference between the upper and lower temperatures immediately after starting the heating operation, the amount of heated air staying in the upper layer of the room increases with the passage of time, and the difference between the upper and lower temperatures increases.

On the other hand, the room temperatures detected by the thermistor 5 and the thermistor 10 are compared by the comparison means. Then, when the difference between the upper and lower temperatures of the comparison result becomes a certain value (for example, 3 ° C.) or more, the control means of the control device 4 stops the operation of the compressor 8 to stop the refrigerant circulation, and only the fan 3 of the indoor unit 1 remains unchanged. Operate and circulate the air without heating the indoor air.
Then, the difference between the upper and lower temperatures became smaller, and the difference between the upper and lower temperatures became 1 ° C. as shown in FIG. Then again compressor 8
The heating operation was continued until the temperature difference between the upper and lower sides exceeded a certain value. As a result of performing the heating operation with the temperature difference between the upper and lower sides within 3 ° C, only 2 out of 10 people feel uncomfortable,
What was discomfort for 9 out of 10 people in the conventional heating operation was greatly improved.

In the above embodiment, the control means controls the compressor 8 when the temperature difference between the upper and lower temperatures of the comparison result becomes a certain value or more.
However, the operation capacity of the compressor 8 may be controlled to change when the difference between the upper and lower temperatures exceeds a certain value. Alternatively, the operating capacity of the compressor 8 may be controlled to be continuously or stepwise changed according to the value of the temperature difference between the upper and lower sides.

Further, in the above embodiment, the case of the heating operation has been described, but the present invention is not limited to this, and the above control may of course be performed during the cooling operation.

Further, in the above embodiment, when the operation of the compressor 8 is stopped, the control means continues the operation of the fan 3 as the air blowing means as it is, but instead of this, in order to promote the stirring of air. The operation of the fan 3 may be controlled to be enhanced.

Further, in the above embodiment, the setting of the upper and lower temperature difference is set to 3 ° C., but the set temperature difference is not limited to this.

In the above embodiment, the control means and the comparison means are constituted by dedicated hardware, but instead of this, the same function may be constituted by software using a computer.

Further, in the above-mentioned embodiment, the first room temperature detecting means and the second room temperature detecting means are installed at the room temperature detecting place. However, the present invention is not limited to this, and if the room temperature of the place to be detected can be detected from a remote place, the installing place. May be elsewhere.

[0023]

As is apparent from the above description, the present invention provides temperature control means for controlling the temperature of indoor air, air blowing means for blowing the temperature-controlled air, and indoor air temperature control means. A first room temperature detecting means for detecting a room temperature at a high predetermined place, a second room temperature detecting means for detecting a room temperature at a place lower than the high predetermined place, the first room temperature detecting means and the second room temperature detecting means.
Comparing means for comparing the room temperatures detected by the room temperature detecting means, and control means for controlling so as to change or stop the capacity of the temperature adjusting means while maintaining the operation of the air blowing means according to the comparison result of the two room temperatures. Since it is provided with, it has an advantage that it is possible to reduce uncomfortable feeling by reducing the temperature difference between the upper and lower sides of room temperature.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a heat pump type air conditioner according to an embodiment of the present invention.

FIG. 2 is a diagram showing a change in an indoor upper and lower temperature difference by the air conditioning apparatus of the same embodiment.

FIG. 3 is a diagram showing a change in an indoor upper-lower temperature difference by a conventional air conditioner.

[Simple explanation of symbols]

 2 Indoor heat exchanger 3 Fan 4 Control device 5 Thermistor 8 Compressor 10 Thermistor

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Hisashi Kodama Hisashi Kodama 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. Within Seiko Co., Ltd.

Claims (2)

[Claims] 1. A temperature control means for controlling the temperature of indoor air, a blowing means for blowing the temperature-controlled air, and a first room temperature detector for detecting a room temperature at a high predetermined place in the room. Means, a second room temperature detecting means for detecting a room temperature at a place lower than the predetermined place, a comparing means for comparing the room temperatures detected by the first room temperature detecting means and the second room temperature detecting means, and the two room temperatures. The air conditioner according to the comparison result, the control means controlling to change or stop the capacity of the temperature adjusting means while maintaining the operation of the air blowing means. 2. The control means enhances ventilation when maintaining the operation of the ventilation means.
The air conditioner described.