JPH04302936A - Air conditioner - Google Patents

Abstract

PURPOSE:To control a shifting time for a set temperature in a sleeping operation mode of an air conditioner in compliance with a temperature of surrounding air. CONSTITUTION:In order to accomplish the aforesaid purpose, it is possible to extend a time required for shifting operation when a temperature of surrounding air detected by a surrounding air temperature sensor is high, to shorten a time required for performing a shifting operation when the surrounding air temperature is low and to perform a proper selection of a time required for performing the shifting operation. Accordingly, it is possible to get a comfortable sleeping operation mode where too cold state or too hot state may not be produced.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner, and more particularly to an air conditioner that controls a set temperature shift in a sleeping mode in accordance with outside air temperature.

0002

[Prior Art] When using an air conditioner for both cooling and heating while sleeping, for example, in order to prevent the air conditioner from becoming too cold while sleeping or being too warm while heating, for example, it is necessary to turn off the air conditioner during sleep when cooling. One hour after entering the room, the set temperature is raised by 1℃,
During heating, the temperature is lowered by 9 degrees Celsius one hour after entering sleep mode. This is sometimes provided as a sleeping driving mode, which is called a "sleep driving" or the like, and is separate from the normal driving mode.

0003

[Problem to be Solved by the Invention] However, as shown in the example above, simply changing the set temperature to prevent excessive cooling or overheating does not necessarily produce the desired effect. There are cases where it is not possible. That is, even if the air temperature in the air-conditioned space is shifted to a predetermined set temperature, the set temperature and the sensible temperature do not necessarily match due to the effects of radiant heat from walls, windows, etc. that do not correspond to the temperature. For example, even if you set the air conditioner to sleep mode, which shifts the set temperature by 1°C after an hour, if the radiant heat from walls and windows is high, it will feel hot and humid, and if it is low, it will feel too cold. this is,
This is because walls and windows are affected by the outside temperature, which means that a comfortable sleeping mode cannot be achieved simply by shifting the set temperature.

0004

[Means for Solving the Problems] The present invention to solve the above-mentioned problems provides a sleeping system that is equipped with at least a compressor, an outdoor heat exchanger, and an indoor heat exchanger, and that automatically shifts the set temperature after a predetermined time. The air conditioner is equipped with a control circuit that variably controls the time it takes to shift the set temperature in response to the outside air temperature detected by an outside air temperature sensor.

[0005]

[Operation] According to the present invention, since the time required to shift the set temperature is changed in accordance with the outside temperature, for example, when the outside temperature detected by the outside temperature sensor during cooling is high, the time required for shifting is lengthened, Sometimes, when the outside temperature is low, the time required for shifting can be shortened and the time required for shifting can be appropriately selected. Therefore, a comfortable sleeping driving mode can be achieved without getting too cold or too warm.

[0006]

[Example] Fig. 1 is a flowchart showing the operation control method of an air conditioner according to an embodiment of the present invention, Fig. 2 is an air conditioning cycle configuration diagram of the air conditioner of the embodiment, and Fig. 3 is an electrical diagram of the air conditioner of the embodiment. It is a circuit diagram. First, the operation of the air conditioner will be explained with reference to FIGS. 2 and 3. In Fig. 2, during cooling operation, a compressor 1, a four-way switching valve 2, an outdoor heat exchanger 3, and a pressure reducing device 4 are shown.
, an indoor heat exchanger 5 are connected by a circulation path in the order of the refrigerant flow direction, and during heating operation, the four-way switching valve 2 is switched to operate the compressor 1, the four-way switching valve 2, the indoor heat exchanger 5, and the pressure reducing device 4.
, connected to the circulation path in the flow direction of the outdoor heat exchanger 3. Reference numeral 6 denotes an outdoor blower used for heat exchange with the outdoor heat exchanger 3, and 7 an indoor blower used for heat exchange with the indoor heat exchanger 5. Further, 8 is a room temperature sensor that detects the indoor temperature, and 9 is an outside temperature sensor that detects the outside temperature. During cooling operation and heating operation, by circulating the refrigerant through the circulation path described above, heat exchange is performed by liquefaction and vaporization of the refrigerant between the indoor heat exchanger 5 and the outdoor heat exchanger 3, and cooling and heating are performed. It will be done. FIG. 3 shows an electric circuit for operating the above configuration, in which a compressor 1, a four-way switching valve 2, an outdoor blower 6, and an indoor blower 7 are each connected to a power source 11, and are turned on and off by a control circuit 10. controlled. Further, a room temperature sensor 8 and an outside temperature sensor 9 are connected to the control circuit 10. Now, cooling operation in normal operation mode is shown in Figure 1.
When starting at the set temperature Ta as shown in the flow, if the indoor temperature T detected by the room temperature sensor 8 is higher than the set temperature Ta, the control circuit 10 closes the on/off contacts 12, 14, and 15 to turn on the compressor 1 and the outdoor air blower. 6 and indoor blower 7 are activated. The indoor temperature T decreases due to cooling operation, and the set temperature Ta
When the room temperature sensor 8 detects that the room temperature is below, the control circuit 10 opens the switching contacts 14 and 15 to stop the compressor 1 and the outdoor blower 6.

Next, the operation when the sleep mode is set will be explained with reference to the flowchart shown in FIG. When the sleep mode is turned on, a timer is set for a predetermined time t until the set temperature Ta is shifted. Next, the outside temperature T
o is detected by the outside air temperature sensor 9, and the outside air temperature To
The shift time ts corresponding to the end of the shift is determined. The shift time ts is the shift time ts according to the outside temperature To as shown in FIG. 5 as an example, and the set temperature T
Shift a. In the example shown in FIG. 5, for example, when the outdoor temperature is 32° C., the shift time ts is 90 minutes, which is the required time to complete the shift. FIG. 4 is a graph of the state of this temperature control, and shows how the set temperature shifts from the room temperature that reaches the set temperature Ta depending on the sleep mode. The set temperature Ta starts shifting from time t,
The shift temperature Tb is increased to maintain a temperature that prevents excessive cooling. This shift time ts is controlled by setting a time corresponding to a preset outside temperature To by a timer circuit. In order to apply the shift time ts to reach the shift temperature Tb, the temperature is increased stepwise by d°C. That is, as shown in the flow of FIG. 1, the step temperature d is
Shift temperature Tb/number of steps n. The step time tc to maintain the step temperature d is the shift time ts
/step number n-1. The control circuit 10 performs control as shown in the flowchart of FIG. 1, so that during cooling operation, the shift time is lengthened when the outside temperature is high.
When the outside air temperature is low, the shift time is shortened and the set temperature is shifted according to the outside air temperature. A similar method is used during heating operation, and a comfortable sleeping operation is achieved without being too cold or too warm.

[0008]

[Effects of the Invention] As explained above, according to the present invention, it is possible to appropriately select the elapsed time for shifting the set temperature in the sleeping operation mode according to the outside temperature, so that the temperature can be comfortably maintained without becoming too cold or too warm. This makes it possible to realize an air conditioner that has a sleeping operation mode.

[Brief explanation of drawings]

FIG. 1 is a flowchart showing operation control of the embodiment device.

FIG. 2 is a configuration diagram of the embodiment device.

FIG. 3 is an electrical circuit diagram of the embodiment device.

FIG. 4 is a temperature change graph showing the state of temperature control.

[Figure 5] Chart comparing outside temperature and shift time.

[Explanation of symbols]

1...Compressor 3...Outdoor heat exchanger 5...Indoor heat exchanger 9...Outside temperature sensor Ta...Set temperature To...Outside temperature

Claims (1)

[Claims] Claim 1: An air conditioner that is equipped with at least a compressor, an outdoor heat exchanger, and an indoor heat exchanger, and has a sleep mode that automatically shifts the set temperature after a predetermined time, in which the set temperature is shifted. An air conditioner characterized by being equipped with a control circuit that variably controls the amount of time it takes to reach the target temperature in response to the outside temperature detected by an outside temperature sensor.