JPH0468538B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to the operation control of an air conditioner in which a room temperature sensor, an operating section for starting and stopping, a compressor, and a four-way switching valve are respectively connected to a control circuit. The present invention relates to an apparatus, and particularly relates to switching control of operating modes between cooling, driving, and heating.

(Prior Art) In this type of operation control device, when the operation is stopped once and then restarted, the room temperature sensor is generally used both at the initial start of operation and at the time of restarting the operation. For example, if the indoor temperature is lower than the set temperature, the indoor temperature detected by
The operating mode was always automatically selected based on the indoor temperature at the start of operation, such as cooling if the opposite was the case, and dry mode if the difference between the indoor temperature and the set temperature was small. .

However, with such a configuration, if the operation is temporarily stopped during dry operation and restarted for dry operation after a short period of time, the entire indoor temperature will become high and the room temperature sensor will not be able to detect it. The difference between the temperature and the set temperature is large, the indoor air conditioning load is small, and even though you want dry operation, the cooling mode is automatically selected and the air conditioning is performed in an operating mode that is contrary to the actual situation. It was hot.

(Problems to be Solved by the Invention) The present invention has been made in view of the above circumstances, and the present invention has been made in view of the above circumstances, and is capable of achieving the required operation mode regardless of the length of the operation stop time while avoiding erroneous selection of the operation mode. The purpose is to make it possible to obtain a good operating mode.

(Means for solving the problems) In order to achieve such an object, the present invention has the following features:
As shown in the correspondence diagram with the claims in FIG. 1, a manually operated operation and stop operation section 1
After the operation of the compressor 6 is stopped, the clock means 5 measures whether or not the operation stop time has elapsed for a set time, and the operation mode at the time of the operation stop is memorized until the operation stop time has elapsed for the set time. , and storage means A for erasing the operation mode at the time of operation stop after the set time of operation stop time has elapsed.
Based on the measurement and determination of the operation stop time by the timer 5 when the operation is started by the operation unit 1,
When the operation stop time has not passed the set time, the operation mode stored in the storage means A is selected, and when the operation stop time has passed the set time, the operation mode is set based on the room temperature detected by the room temperature sensor 2. Each control circuit 4 is provided with an operation mode selection means B for selecting an operation mode, and the operation mode set based on the room temperature detected by the room temperature sensor 2 in the operation mode selection means B is selected depending on the detected room temperature. When the temperature is in the low temperature range lower than the first set temperature, the mode is heating mode. When the temperature is in the medium temperature range between the first set temperature and the second set temperature, which is higher than that, the mode is set to dry mode. The mode is in the high temperature range higher than the second set temperature. It is characterized by being in cooling mode at one point.

(Function) With this configuration, a predetermined period of time, such as 60 minutes, during which the air conditioning load does not change significantly before the operation is stopped, is set, and within the set time when the air conditioning load is considered not to have changed significantly from before the operation is stopped. When restarting operation, the same operation mode as before the operation was stopped is selected regardless of the room temperature detected by the room temperature sensor, and conversely, the air conditioning load may have changed significantly from before the operation was stopped. After a period of time has elapsed, the vehicle is operated in the operating mode selected based on the room temperature detected by the room temperature sensor.

(Example) Hereinafter, the present invention will be described in detail based on an example shown in the drawings. FIG. 2 is a schematic circuit diagram showing an operation control device for an air conditioner according to an embodiment of the present invention, and FIG. 3 is an electric circuit diagram, in which 1 is a manually operated operation and stop operation section, 2 3 is a room temperature sensor, 3 is a room temperature setting device, 4 is a control circuit, and 5 is a timer as a time measurement means. 6 is a compressor, 6a is a compressor 6
6b is a relay switch for starting the relay. Reference numeral 7 designates a four-way switching valve for switching the refrigerant circulation flow path for cooling/warming switching, 7a a relay for switching the four-way switching valve 7, and 7b a relay switch thereof. 8 is an indoor fan, 8a is a relay for starting the indoor fan 8, and 8b is a relay switch thereof. 9 is an outdoor fan, 9a is a relay for starting the outdoor fan 9, and 9b is a relay switch thereof. 10 is a buffer circuit.

The operation unit 1 includes an operation switch 11 for starting and stopping the air conditioner, a changeover switch 12 for switching between a fully automatic state for automatically selecting the operating mode and a manually selected state, and a selector switch 12 for selecting the cooling mode. A switch 13 for selecting the dry mode, a switch 14 for selecting the dry mode, and a switch 15 for selecting the heating mode are provided. Further, although not shown, the operation section 1 allows selection of air blowing.

After the operation of the compressor 6 is stopped, the timer 5 is operated for a set time and reset by a signal from the control circuit 4. This setting time is set to a time during which when the air conditioner is operated in a predetermined operation mode and then stopped or turned on to blow air, the air conditioning load in that operation mode does not change significantly, such as 60 minutes. Set.

Next, the operation of this embodiment will be explained using the flowchart shown in FIG.

First, it is determined whether the compressor 6 is being operated (F1). If you decide that you are not driving here,
Next, it is determined whether the timer 5 is turned on (F2), and if the timer 5 is not turned on, the timer 5 is turned on (F3), and then the process moves to subroutine S1 for stop processing. If the timer 5 is turned on in step F2, then it is determined whether the set time has elapsed (timer over) or not (F4). If the set time has not elapsed, the timer 5 is turned on before the compressor 6 is stopped The process moves to subroutine S1 for stopping processing while keeping the operating mode stored. In step F4, if it is determined that the set time has elapsed, the cooling mode flag Fmc, the dry mode flag Fmd, and the heating mode flag are set.
When both Fmw and the fully automatic flag Mfull are 0, the operating mode of the compressor 6 before the operation stop is erased from the storage means A (F5), and then the process moves to the subroutine S1 of the stop processing. In the stop processing subroutine S1, as shown in FIG. 5, the compressor 6, the four-way selector valve 7 selector switch, the indoor fan, and the outdoor fan are both turned OFF.
Return to step F1. Therefore, the above flow is repeated when the operation is stopped.

If it is determined to be driving in step F1,
Next, it is determined whether or not it is fully automatic based on the state of the changeover switch 12 (F6), and if it is determined that it is not fully automatic, the fully automatic flag is set to 0 (F6).
7). Thereafter, the switch 13 determines whether or not the air conditioner is in the cooling state (F8), and if it is determined that the air conditioner is in the cooling state, it is then determined whether the thermostat is on (F9). Here, if it is determined that the thermostat is ON, only the cooling mode flag is set to 1 (F10), and the timer 5 is reset (F11).
Then, the process moves to the cooling mode subroutine S2.
Also, when it is determined in step F9 that the thermostat is not turned on, the process moves to the cooling mode subroutine S2. In the cooling mode subroutine S2, as shown in FIG. 6, the changeover switch for the four-way selector valve 7 is turned on, and the temperature is adjusted according to the fully automatic state and manual state of the fully automatic flag. The compressor 6, the indoor fan, and the outdoor fan are each turned on in response to the thermostat being turned on by comparison, and the process returns to step F1.

If it is determined in step F8 that the air conditioner is not in the cooling condition, then it is determined by the switch 14 whether or not the air conditioner is in the dry condition (F12). If it is determined that the condition is dry, then it is determined whether the thermostat is on (F13). Here, if it is determined that the thermostat is ON, only the dry mode flag is set to 1 (F14), the timer 5 is reset (F15), and the process moves to the dry mode subroutine S3. In addition, the above steps
Even when it is determined at F13 that the thermostat is not ON, the process moves to the dry mode subroutine S3. In the dry mode subroutine S3, as shown in FIG. 7, the changeover switch for the four-way selector valve 7 is turned on, and the room temperature Ta is set according to the fully automatic state and manual state of the fully automatic flag. Thermo by comparison with temperature
In response to this, the compressor 6 and the outdoor fan are turned on, and the indoor fan is turned on in a state of ultra-light wind, and the process returns to step F1.

If it is determined in step F12 that the dry state is not present, then it is determined by the switch 15 whether or not the heating state is present (F16). If it is determined that the heating is on, it is then determined whether the thermostat is on (F17). Here, the thermo
If it is determined that it is ON, only the heating mode flag is set to 1 (F18), the timer 5 is reset (F19), and the process moves to the heating mode subroutine S4. Also, when it is determined in step F17 that the thermostat is not turned on, the process moves to the heating mode subroutine S4.
In the heating mode subroutine S4, the eighth
As shown in the figure, depending on the fully automatic state and manual state of the fully automatic flag, the compressor 6, indoor fan, and outdoor fan are each turned on in response to the thermostat being turned on by comparing the room temperature Ta and the set temperature.
Then, it returns to step F1.

If it is determined in step F16 that there is no heating state, then it is determined whether or not the timer 5 is turned on (F20), and if the timer 5 is not turned on, the timer 5 is turned on (F21).
The flow then moves to the air blowing subroutine S5. If timer 5 is turned on in step F20,
Next, it is determined whether the set time has elapsed (F22), and if the set time has not elapsed,
The operation mode before the operation of the compressor 6 is stopped remains stored, and the process moves to the air blowing subroutine S5. If the set time has elapsed in step F22,
When the flags for any of the cooling, drying, and heating modes are set to 0, the operating mode of the compressor 6 before the operation is stopped is erased from the storage means A (F23), and then the flow shifts to the air blowing subroutine S5. In the air blowing subroutine S5, as shown in FIG. 9, the indoor fan is operated with either ultra-light wind, light wind, weak wind, or strong wind, depending on the air volume setting.

In step F6, if it is determined that the system is fully automatic, the fully automatic flag is set to 1 (F24).
Thereafter, it is determined whether or not it is the cooling mode based on the cooling mode flag (F25), and if it is the cooling mode, the process moves to step F11. If it is not the cooling mode, then it is determined whether it is the dry mode based on the dry mode flag (F26), and if it is the dry mode, the process moves to step F15. If it is not the dry mode, then it is determined whether it is the heating mode based on the heating mode flag (F27);
If it is heating mode, proceed to step F19. If it is not in heating mode, it is determined whether the room temperature Ta detected by room temperature sensor 2 is higher than 27°C (F2
8) If the temperature is higher than 27℃, proceed to step F10.
Automatically select cooling mode. Room temperature Ta is 23℃
It is determined whether the temperature is higher than 23°C (F29), and if it is higher than 23°C, the process moves to step F14 and the dry mode is automatically selected. If the room temperature Ta is lower than 23°C, the process moves to step F16 and the heating mode is automatically selected.

The flow consisting of steps F27 and F28, and steps F2 to F5 and F20 to F23 described above is referred to as operation mode selection means B.

As a result of the above action, for example, if the vehicle stops while driving in dry mode, the first
As shown in Figure 0, if the elapsed time from the time when the compressor 6 is stopped and the operation is stopped or starts blowing air until the time when it is restarted has not passed the set time tm, the indoor temperature is in the cooling zone. will continue to operate in dry mode. If the elapsed time until restarting exceeds the set time tm, the system is operated in the operating mode selected based on the room temperature Ta. This figure shows a state in which the cooling mode is selected.

In the above embodiment, the set time of the timer 5 is the same regardless of whether the compressor 6 is stopped due to the complete stop of the air conditioner or when the air conditioner is switched to blowing air. The invention takes into account that, for example, in the case of blowing air, the air-conditioned atmosphere before the compressor 6 stops operating relatively quickly disappears,
In the case of blowing air, it may be set to a shorter time than in the case of complete stop.

(Effects of the Invention) As described above, according to the present invention, when restarting operation, the elapsed time from the time of operation stop is taken into consideration, and the room temperature is Since the same operating mode as before the operation is stopped is selected regardless of the temperature detected by the sensor, it is possible to prevent unexpectedly selecting a different operating mode. In addition, when the set time has elapsed after stopping operation, the operating mode is selected based on the temperature detected by the room temperature sensor, so in situations where the air conditioning load may change significantly, the room temperature is detected and the operation mode is adjusted according to the actual situation. Now you can select the operating mode based on the current condition and automatically control the air conditioning.

[Brief explanation of the drawing]

FIG. 1 is a diagram corresponding to the claims, FIG. 2 is a circuit diagram showing a control device according to an embodiment of the present invention, and FIG.
The figure is an electric circuit diagram, Figure 4 is a flowchart, and Figure 5 is a flowchart.
6 is a flowchart showing a subroutine for cooling mode, FIG. 7 is a flowchart showing a subroutine for dry mode, and FIG. 8 is a flowchart showing a subroutine for heating mode. FIG. 9 is a flowchart showing the air blowing subroutine, the first
Figure 0 is a diagram for explaining the action. 1... Operation unit, 2... Room temperature sensor, 4... Control circuit, 5... Timing means, 6... Compressor, 7... Four-way switching valve, A... Memory means, B... Operating mode selection means.

Claims (1)

[Scope of Claims] 1. In an operation control device for an air conditioner, in which a room temperature sensor 2, a manually operated operation/stop operation section 1, a compressor 6, and a four-way selector valve 7 are connected to a control circuit 4, respectively. , a timer 5 for measuring whether or not the operation stop time has elapsed for a set time after the operation of the compressor 6 is stopped by the operation unit 1; storage means A for storing the operation mode of the operation mode and erasing the operation mode at the time of operation stop after the operation stop time has elapsed for a set time; Based on the measurement determination of the stop time, if the stop time has not exceeded the set time, the operation mode stored in the storage means A is selected, and if the stop time has exceeded the set time, the room temperature sensor 2 Each of the control circuits 4 includes an operation mode selection means B for selecting an operation mode set based on the room temperature detected by the operation mode selection means B, and the operation mode selection means B selects the operation mode set based on the room temperature detected by the room temperature sensor 2. The operating mode is a heating mode when the detected room temperature is in a low temperature range lower than the first set temperature, a dry mode when the detected room temperature is in a medium temperature range between the first set temperature and a second set temperature higher than the first set temperature, Second
An operation control device for an air conditioner, characterized in that a cooling mode is set when the temperature is in a high temperature range higher than a set temperature.