JPH04320745A - Control device for air conditioner - Google Patents

Abstract

PURPOSE:To enable a cold state or a hot state to be rapidly eased when an operation is started by a method wherein in the case that a difference between an indoor air temperature and a temperature at an indoor wall surface is small when either a cooling or a heating operation is started, a set temperature is lowered when the cooling operation is carried out and increased when the heating operation is carried out in view of a radiation heat at the indoor wall surface. CONSTITUTION:A temperature of indoor air in a dwelling spacing is detected by the first temperature sensor 9. In turn, since the second temperature sensor 12 is stored in a remote controller 10, the second temperature sensor 12 detects a temperature of air near the wall surface. A control device 13 of an air conditioner has inputs from a value detected by the first temperature sensor 9, a value detected by the second temperature sensor 12 and a set temperature optionally defined by a customer and then it outputs an operating signal of the air conditioner 4. Phenomenon where the temperature difference is decreased is detected only when the cooling operation of the air conditioner 1 is started and when the temperature difference is smaller than the predetermined value, the set value defined by the customer is forcedly decreased and the cooling operation of the air conditioner is controlled in response to the reduced value.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device that includes sensors for detecting room temperature and the like at two locations in a room and controls the operation of an air conditioner based on the values detected by the sensors.

0002

[Prior Art] Japanese Patent Publication No. 58-54334 discloses that a first temperature sensor that detects the indoor temperature and a second temperature sensor that detects the temperature of the walls and floor of the room are provided. When the difference between the respective detected values is less than a certain value, based on the value detected by the first temperature sensor, that is, the indoor temperature,
It has been shown to control the operation of air conditioners.

0003

[Problem to be Solved by the Invention] Here, in particular, when the operation of the air conditioner is restarted after the operation of the air conditioner has stopped for a long time (for example, the operation of the air conditioner has been stopped all night). When the operation is started the next morning), the temperature inside the room and the temperature of the walls and floor in the room are approximately the same, or the difference between the two temperatures is small (below a certain value).

[0004] When the temperature difference between the two is below a certain value, if the operation of the air conditioner is controlled based on the indoor temperature, the temperature will increase due to the thermal influence (thermal radiation) of the indoor wall and floor temperatures. , it took a long time for the indoor temperature to reach the set temperature, and there was a risk that it would be difficult to eliminate the cold (when cooling) or heat (when heating) at the start of operation.

An object of the present invention is to quickly bring the indoor temperature to a set temperature when the air conditioner has stopped operating for a long time and the difference between the indoor temperature and the temperature of the indoor wall surface becomes small. That is.

[0006]

[Means for Solving the Problems] In order to achieve this object, the present invention includes a second temperature sensor that detects the temperature of the wall or ceiling of the room or the temperature of the air adjacent to the wall, and and a first temperature sensor that detects the temperature of the living space, and if the difference between the values detected by both temperature sensors at the start of operation is smaller than a predetermined value, the set temperature is changed (
The system is equipped with a control means that lowers the temperature during cooling and increases it during heating.

[0007]

[Function] At the start of operation, if the difference between the temperature of the indoor wall surface or the air adjacent to this wall surface and the temperature of the indoor air is smaller than a predetermined value, the set temperature will be lowered during cooling and raised during heating. To promptly control the temperature of indoor air even if it is affected by radiant heat from indoor walls by operating an air conditioner.

[0008]

[Embodiment] In FIG. 1, 1 is an indoor unit installed on the ceiling of a room 50, 2 is an outdoor unit connected to this indoor unit 1 by a refrigerant pipe 3, and these two units constitute an air conditioner 4. There is. The indoor unit 1 has a built-in fan 5 and a heat exchanger 6, and indoor air is sucked into the indoor unit 1 from the suction port 7, cooled or heated by the heat exchanger 6, and then discharged. It is blown out from outlet 8. 9 is a first temperature sensor provided inside the suction port. 10 is a remote control for this air conditioner 4, which is attached to an indoor wall surface 11. 12 is a second temperature sensor housed in this remote controller. Here, the first temperature sensor 9 detects the temperature of the air sucked into the indoor unit 1, that is, the temperature of the air in the indoor living space (T1). On the other hand, the second temperature sensor 12 is built into the remote control 10 and therefore detects the temperature of the indoor wall surface 11 or the temperature (T2) of the air adjacent to this wall surface. Reference numeral 13 denotes a control device for this air conditioner, which measures a value T1 detected by the first temperature sensor 9, a value T2 detected by the second temperature sensor 12,
A set temperature arbitrarily determined by the customer is input, and an operating signal for the air conditioner 4 is output.

This control device operates as shown in FIG. First, when the operation starts, the first
The indoor air temperature T1 detected by the temperature sensor 9 of the second
The temperature T2 of the indoor wall surface or the air adjacent to this wall surface detected by the temperature sensor 12 is input. Further, in step 21, it is determined whether the above-mentioned operation is a cooling operation or a heating operation, and if the operation is a cooling operation, the process proceeds to step 22, and if it is a heating operation, the process proceeds to step 23.

First, during cooling operation, it is determined in step 22 whether the absolute value of the difference between the indoor air temperature T1 and the indoor wall temperature T2, that is, |T1-T2|, is larger or smaller than a predetermined value C1. Then, only when the value is smaller than the predetermined value C1, the process moves to step 24, and a value S1 that is lower than the set temperature determined by the customer by α (several degrees Celsius) is determined. Then, the cooling operation is continued until the value T2 detected by the second temperature sensor reaches (decreases) the above-mentioned value S1, and T2
When becomes S1 or less, this cooling operation is stopped (steps 25 and 26). After this stop, step 27
T2 is compared with the above-mentioned set temperature, and when T2 reaches the set temperature, operation is restarted. When the above-mentioned |T1-T2| is larger than the predetermined value C1, the cooling operation is continued until T2 reaches the set temperature, and when it reaches the set temperature, the process moves to step 26 and this operation is stopped.

[0011] As described above, when the cooling operation of the air conditioner is stopped for a long time, the indoor air temperature T1 and the indoor wall surface 11
The difference between the temperature T2 and the temperature T2 becomes small. This reduced phenomenon is detected in step 22 only when the air conditioner 1 starts cooling operation, and when the above-mentioned temperature difference is smaller than the predetermined value C1,
In step 24, the setting value set by the customer is forced to α (several degrees Celsius).
), and the cooling operation of the air conditioner is controlled based on the reduced value S1. Therefore, steps 22 and 24 serve as control means 28 for adjusting the set temperature.

On the other hand, during heating operation, it is determined in step 23 whether the absolute value of the difference between the indoor air temperature T1 and the indoor wall temperature T2, that is, |T1-T2|, is larger or smaller than a predetermined value C2. Then, only when the value is smaller than the predetermined value C2, the process moves to step 30, and a value S2 is determined which is increased by β (several degrees Celsius) from the set temperature determined by the customer. Then, the value T detected by the second temperature sensor is added to the above-mentioned value S2.
Heating operation is continued until T2 reaches (decreases) T2, and when T2 becomes equal to or lower than S1, this heating operation is stopped (steps 31 and 32). After this stop, T2 is compared with the above-mentioned set temperature in step 33, and when T2 reaches the set temperature, operation is restarted. When the above-mentioned |T1-T2| is larger than the predetermined value C1, the process moves to step 33, and the heating operation is continued until T2 reaches the set temperature, and when it reaches the set temperature, the process moves to step 32 to stop this operation.

[0013] As described above, when the heating operation of the air conditioner 1 is stopped for a long time, the difference between the indoor air temperature T1 and the indoor wall temperature T2 becomes small. This reduced phenomenon is detected in step 23 only when the heating operation of the air conditioner is started, and when the above-mentioned temperature difference is smaller than the predetermined value C2, the set value determined by the customer is forcibly changed to β (several degrees Celsius). ), and the heating operation of the air conditioner 1 is controlled based on the increased value S2. Therefore steps 23, 30
becomes the control means 34 that adjusts the set temperature.

[0014]

[Effects of the Invention] As described above, when starting cooling or heating operation, if the difference between the temperature of the indoor air and the temperature of the indoor wall is small, the radiant heat of the indoor wall is taken into account and the set temperature is set for cooling. Since the temperature is lowered and raised during heating, the cold (when heating) or heat (when cooling) at the start of operation can be quickly alleviated.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing an installed state of an air conditioner according to the present invention.

FIG. 2 is a flowchart showing control of the air conditioner control device shown in FIG. 1;

[Explanation of symbols]

4 Air conditioner 9 First temperature sensor 12 Second temperature sensor 13 Control device 28, 34 Control means C1, C2 Predetermined value

Claims (1)

[Claims] [Claim 1] A first device for detecting the temperature of an indoor living space.
and a second temperature sensor that detects the temperature of the wall surface of this room or the temperature of the air adjacent to this wall surface, and operates the air conditioner based on the value detected by both temperature sensors and the set temperature. A control device for controlling an air conditioner, characterized in that the air conditioner is equipped with a control means that changes the set temperature if the difference between the values detected by both sensors is smaller than a predetermined value when the air conditioner starts operating. Machine control device.