JPH07107459B2 - Control method for forward operation of air conditioner - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a forward operation control method for an air conditioner, and is particularly suitable for operating an indoor temperature at a designated time at a target temperature with a minimum amount of electric power. The present invention relates to a method for controlling the forward operation of an air conditioner.

[Prior Art] Japanese Patent Publication No. Sho 60-19407 discloses a method of pre-cooling and pre-heating in which the air conditioner is started in advance before the scheduled time so that the indoor temperature reaches the required target temperature at the specified time (scheduled time). As described, a method of measuring the temperature change in the room before starting operation, predicting the room temperature, multiplying the proportional coefficient of each room to obtain the room precooling and preheating loads, and determining the start time of the air conditioner There is.

However, the method described in the above publication does not take into consideration that the air conditioner is started in advance, that is, the so-called forward operation control, that the operation control is performed with the minimum amount of electric power, and that the indoor load is calculated. The proportional coefficient had to be input to the arithmetic control means such as the microcomputer of the air conditioner for each building and each room.

[Problems to be Solved by the Invention] In the above-mentioned prior art, the amount of electric power of the air conditioner for regularly setting the indoor temperature to the target temperature is not taken into consideration, and the proportional coefficient of each room, for example, the heat leakage coefficient. Therefore, there is a problem in that it cannot be applied to a wide range of household appliances such as a domestic air conditioner that is mass produced.

The present invention has been made to solve the above-mentioned problems of the prior art. According to the size of the room and the room temperature at the time of startup, the target temperature can be set to the target temperature with the minimum amount of power. It is an object of the present invention to provide a forward operation control method for an air conditioner, which has great effects on power saving, improvement of comfort, and usability when applied to control of an air conditioner for use.

[Means for Solving the Problems] In order to achieve the above object, the configuration of the forward operation control method for an air conditioner according to the present invention is configured so that the indoor temperature is set to a specified time and then to a target temperature. In the forward operation control method of the air conditioner that starts the air conditioner at the time of, the compressor rotation speed at the constant speed at the time of startup and this speed are determined according to the magnitude of the temperature difference between the sensed room temperature and the target temperature. The branch room temperature at which operation is performed at a constant speed compressor speed and operation is performed at a compressor speed that is higher than the constant speed compressor speed, and the predicted advance time at which operation should start before the specified time Each is proportionally increased, and the air conditioner is started at the time when the sum of the predicted advance time corresponding to the sensed indoor temperature and the current time reaches the specified time, and the indoor temperature is the target temperature at the specified time. Must be In this case, the advance time is corrected from the difference between the actual operation time required to reach the target temperature and the advance time, and the next advance operation is performed.

More specifically, in the present invention, the operation control of the compressor is at least two stages, and the constant speed rotation speed of the compressor at the start of operation and the branch room temperature at which the rotation speed of the compressor should be switched are set to the indoor temperature at the start of operation. As a function, after the room temperature reaches the branch room temperature, the compressor operating speed higher than the constant speed rotating speed, in particular, the forward operating method of the air conditioner operating at full speed to the target temperature. Is.

In addition, the above-mentioned purpose is to compare the start-up performance by changing the room temperature, the room capacity, the compressor rotation speed, and the branch room temperature in various ways, and the forward time that is the minimum electric energy, the compressor rotation speed,
The branch room temperature is input to the control device as a function of the room temperature at the start of operation of the air conditioner, and the rise time during actual operation is stored, and the coefficient of the above function, especially the advance time is corrected according to the load of the room. It is achieved by

[Operation] The time is monitored by the clock after the air conditioner is stopped, the indoor temperature is measured at the same time, and the relational expression or data that is the minimum electric energy for the indoor temperature to reach the target temperature is input in advance. The forward moving time is set, and the operation of the air conditioner is started when the sum of the current time and the forward moving time reaches the designated time.

Furthermore, a controller having an operation algorithm (a function for learning according to the flow chart of FIG. 1 described later) that stores actual operation data and corrects the relational expression or the data is set at a specified time even when the load of the room changes. The target temperature can be set with the minimum amount of power.

Embodiments Embodiments of the present invention will be described below with reference to FIGS. 1 to 9.

First, FIG. 1 is a flow chart showing an operation algorithm of an operation control method for an air conditioner according to an embodiment of the present invention, and FIG. 2 shows heart sound changes with respect to time in the operation control method shown in FIG. The diagram shown, FIGS. 3 and 4,
FIG. 5 is a characteristic diagram that derives a relational expression that gives the minimum amount of power, FIG. 5 is a diagram showing a method of correcting the forward-moving time when the load of the room changes, and FIG. 6 is an air diagram according to an embodiment of the present invention. It is a block diagram showing composition of a control device which realizes an operation control method of a harmony machine.

First, the meanings of the diagrams will be described with reference to FIGS.

In FIG. 2, the horizontal axis represents the change in time, τ ₁ represents the current time when the forward running operation is started, and τ _set represents the scheduled time associated with the designated time. The vertical axis represents the temperature of the room to be air-conditioned, that is, room temperature, and T _s is the room temperature at startup, T _set
Is the required target temperature, and T _m is the room temperature at which the rotation speed of the compressor should be switched, that is, the branch room temperature.

Here, Fig. 2 shows an example of heating operation, and the solid line from the stop of the compressor to the current time τ ₁ is a state in which the room temperature has dropped to T _s while the heating operation is stopped, such as at night. Is. Those in this state, scheduled tau _{The set,} for example, the target temperature of the room temperature at morning 6 T _{The set,} in order to, for example, 20 ° C., in the earliest current time tau ₁ predicted advance interval .DELTA..tau ₀ than scheduled launch an air conditioner In this state, the room temperature is raised. In Figure 2, branches from startup room T _s at room temperature
The solid line from T _m to the target temperature T _set indicates the predicted change in room temperature accompanying the operation of the compressor (operation of the air conditioner) under the conditions set by the calculation described later. Compressor, branches rt T _m until the constant speed of the compressor speed during startup N _m
After reaching the branch room temperature T _m , the compressor is operated at a full speed compressor speed higher than the constant speed compressor speed up to the target temperature T _set . In this embodiment, an example in which full power operation is performed even when the branch room temperature T _m is reached will be described below.

In FIG. 2, the broken line indicates the room temperature change in the actual operation when the room temperature does not reach the target temperature T _set at the fixed time τ _set . At this time, the actual required time required to actually reach the target temperature T _set is Δτ ₀ ′.

FIGS. 3 and 4 show the formulas for calculating the predicted advance time Δτ ₀ that is the minimum power amount, the constant speed compressor rotation speed N _m , and the branch room temperature T _m , which are used in the control algorithm of FIG. 1 described later. It is a figure explaining a ground, and is a line diagram which plotted the result computed by each formula.

Figure 3 is the size of the room, the track at room temperature, under the condition of fixing the outside air temperature, the branched room temperature T _m to switch the compressor to full power operation from the constant-speed operation on the horizontal axis, at each branch room temperature T _m 2 is a graph in which the compressor rotation speed N _m , which is the minimum amount of power, and the advance time Δτ ₀ are plotted on the vertical axis. The branch room temperature at which the power amount P is the minimum, the compressor rotation speed, and the advance time are shown. here,
The amount of electric power at the branch room temperature, the compressor rotation speed, and the advance time are the power consumption and the compressor rotation speed when the power is saved by changing the constant-speed compressor rotation speed at start-up under certain branch room temperature conditions. , It is a display of the advance time. When this is calculated and displayed according to each branch room temperature, the result shown in Fig. 3 is obtained,
The size of a certain fixed room, room temperature at start-up, branch room temperature T _m that is the most power-saving under the conditions of target temperature, compressor speed
N _m and the advance time Δτ ₀ are determined.

Here, when the branch room temperature is lowered in FIG. 3 (when the branch room temperature is the same as the room temperature at startup), and when the branch room temperature is floored (the highest branch room temperature and the target temperature). Are equal) is the same as the conventional operation. When the compressor is full power operation from the start, the amount of power, compressor speed is about 20% larger than the method of full power operation after reaching the constant speed N starts in _m branches room temperature T _m . This is because the air temperature rises in a short time because the compressor operates at high speed, but the temperature difference with the wall surface where the temperature rises later increases, and the amount of heat absorbed by the wall increases. This is because the efficiency of is decreased at the high speed side and the power consumption of the air conditioner is increased. In addition, when operating at a highly efficient intermediate speed only, the time to reach the target temperature is prolonged, so the amount of heat is accumulated from the wall surface to the inside of the wall,
Not used for effective raising of room temperature.

Therefore, in order to increase the air temperature and the wall surface temperature that affect the thermal sensation of the human body with power saving, the air and the wall surface temperature are increased to some extent with an efficient compressor rotation speed,
After that, there is an appropriate branch room temperature that runs the compressor at high speed to raise the air temperature in a short time.

FIG. 4 shows the branch room temperature T _m , which is the minimum power shown in FIG.
A study was conducted to find the compressor rotation speed N _m and the advance time Δτ ₀ by changing the room temperature at startup, the room size, and the outside air temperature.

As shown in FIG. 4, it is understood that the branch room temperature T _m and the compressor rotation speed N _m are not affected by the room size and the outside air temperature, and are determined by the starting room temperature T _s . When the startup room temperature T _s is low, the compressor rotation speed N _m is high and the branch room temperature T _m is low. Conversely, when the startup room temperature T _s is high, the compressor rotation speed N _m is low and the branch temperature T _m is low. Setting _m to be high allows operation with the minimum amount of electricity. That is, when the room temperature T _s at startup is low, the compressor rotation speed N _m is set high and the branch temperature T _m is set low to prevent the operating time from being too long. Conversely, when the room temperature T _s at startup is high. Is to reduce the compressor rotation speed N _m and the branch room temperature T _m to shorten the full power operation time to save power.

The solid line of the predicted advance time Δτ ₀ shown in FIG. 4 is the plot result when the size of the room is used as a reference, the dashed line is the large room, and the broken line is the plot result of the small room. The predicted advance time Δτ ₀ is the room. It depends on the size of.

The air conditioner pre-estimates the size of the target room according to its capacity, and the result of calculating the predicted advance time Δτ ₀ for this assumed standard room is a temporary function of the room temperature T _s at startup. When expressed, the formula (1) is obtained.

The reference coefficient in each of the following equations is a coefficient in each calculation when the above-mentioned reference room is assumed, and is set when the air conditioner is shipped from the factory.

Δτ ₀ = a · T _s + b (1) where a and b are the reference coefficients, a is the slope of the solid line of the advance time with respect to the starting room temperature T _{s in} Fig. 4, and b is the starting room temperature T _s. 0
It is the forward moving time at ℃.

Further, the constant speed compressor rotation speed N _m is correlated with the room temperature at startup T _s, and the equation (2) is obtained as a function of the room temperature at startup.

N _m = c · S _s + d (2) where c and d are reference coefficients, c is the slope of the straight line of the compressor speed with respect to the starting room temperature T _{s in} Fig. 4, and d is the starting room temperature T. It is the number of revolutions of the compressor when _s is 0 ° C.

Further, the branch room temperature T _m has a strong correlation with the starting room temperature T _s, and the equation (3) is obtained.

T _m = eT _s + f (3) where e and f are reference coefficients, e is the slope of the straight line of the branch room temperature with respect to the room temperature T _s at startup in Fig. 4, and f is the room temperature T _s at startup. 0 ° C
It is the room temperature of branching.

Next, FIG. 5 shows the predicted advance time Δτ ₀ and the actual required time Δ.
It is a diagram used for estimating the room actual load from the difference with τ ₀ ′ and calculating the next advance time Δτ ₀ ″.

In FIG. 5, the horizontal axis represents the room temperature at startup, T _s represents the room temperature at startup in this operation, and T _s ′ represents the room temperature at next startup at the next advance time Δτ ₀ ″. Also, the vertical axis represents the room temperature at startup. Is taking time ahead of schedule.

As shown in FIG. 4, the method for obtaining the actual load in FIG. 5 is to calculate a predicted advance time assuming a plurality of loads different from the reference load in advance, for example, a heat load applied to the room depending on the season, and calculate each load. Slope, that is, the amount of change in the advance time when the room temperature changes by 1 ° C at startup, and the startup own room temperature T _s ,
A reference load in the room temperature T _s, different when the difference in their advance interval the load, when starting at room temperature T _s, the difference between the accelerated time (Δτ _{0 '-Δτ 0)} as a variable, the slope at any actual load K Equation (4) for obtaining is obtained.

K = g + h · T _s + i (Δτ ₀ ′ -Δτ ₀ ) (4) where g, h, i is the reference coefficient. In this way, the actual load is calculated by the equation (4) and the forward load corresponding to that load is calculated. The time Δτ ₀ ″ is calculated by the equation (5) in consideration of the difference between the starting room temperature T _s at the standard load and the next starting room temperature T _s ′ and the slope K of the actual load shown by the broken line.

Δτ ₀ ″ = Δτ ₀ ′ + K (T _s −T _s ′) (5) As described above, in this embodiment, the first forward driving is performed using the equations (1), (2), and (3). and performed and a second time, the compressor rotational speed N _m by startup room temperature T _s' from (2) to calculate the branch room temperature T _m from the equation (3), first launch room temperature T _s,
From the predicted advance time Δτ ₀ and the actual required time Δτ ₀ ′, the predicted advance time Δτ ₀ ″ is calculated using the equations (4) and (5).

The third time, the second data T _s ′ is set to T _s , and Δτ ₀ ″ is set to Δτ _0.
Then, the advance time Δτ ₀ ″ is newly obtained using the second actual required time Δτ ₀ ′ and the third room temperature T _s ′.
In this way, the data is sequentially updated and the compressor rotation speed is changed.
N _m , branch room temperature T _m , and predicted advance time Δτ ₀ are determined.

Next, the procedure of the forward operation control of the air conditioner of the present embodiment will be described according to the steps of the flow chart of FIG.
The description will be made with particular reference to FIG.

First of all, the user must check the time τ _set and the target temperature T in advance.
_{Set set} and input to the input unit of the control device described later.

After the air conditioner is stopped (step), the clock monitors the time, at the same time measures the room temperature T _s , calculates the predicted advance time Δτ ₀ by the equation (1), and calculates the current time τ ₁ and the predicted advance time Δτ ₀ . When the sum reaches the scheduled τ _set (step)
Then, the constant rotation speed N _m of the compressor and the branch room temperature T _m are (2),
It is calculated by the equation (3) (step), the air conditioner is started, and the compressor is operated at a constant speed compressor rotation speed N _m (step).

After the room temperature reaches the branching room temperature T _m (step), the target temperature T
Perform full power operation up to _set (step).

When the target temperature T _set does not reach the target temperature T _set at the fixed time τ _set , the actual required time Δτ ₀ ′ when the room temperature actually reaches the target temperature (step) is read (step), and the data is stored in the data file of the control device. (Step). Then, as shown in FIG. 5, the actual load of the room is estimated from the difference between the predicted advance time Δτ ₀ and the actual required time Δτ ₀ ′ by using the equations (4) and (5), and the next advance time is calculated. Δτ ₀ ″ is calculated, and the coefficient is corrected (step).

An example of a control device that performs such a forward operation control method will be described with reference to FIG.

In FIG. 6, reference numeral 1 is an indoor temperature sensor, and the detected temperature is taken into the operation control unit 3 through the measurement circuit 2.
Reference numeral 4 denotes a clock, which is used to determine the stop time of the air conditioner, the current time, the temperature measurement cycle, and the start of operation. Reference numeral 5 is a data file for storing performance data and actual operation results of the air conditioner, 6 is an input unit for setting a designated time (fixed time) and target temperature, and 7 is an air conditioner for controlling a compressor or the like. Hit the object.

By inserting a program having a control algorithm as shown in FIG. 1 into the operation control unit 3, each calculation is performed and a control command for the controlled object 7 is output. That is, the operation control unit 3 corresponds to a calculation control device such as a calculation unit and an output unit of a microcomputer.

According to the present embodiment, the target temperature can be set to the target temperature with the minimum amount of power on time according to the size of the room and the room temperature at the time of startup, and power saving and comfort when applied to the control of the home air conditioner and the like. It has a great effect on the improvement of usability and usability.

Next, another embodiment of the present invention will be described with reference to FIGS. 7 to 9.

7 to 9 are table data diagrams used in the operation control method according to another embodiment of the present invention.

In the above-described embodiment, the predicted advance time Δτ ₀ is the equation (1), the rotation speed N _m of the constant speed compressor is the equation (2), and the branch room temperature T _m is (3).
Calculated by the formula, and next advance time Δτ ₀ ″ is (4), (5)
Although the calculation is performed by the formula, the table data stored in the data file may be used for the control instead of the calculation.

FIG. 7 is table data for carrying out the above-described control. Targets are the predicted advance time Δτ ₀ , the branch temperature (the temperature difference between the branch room temperature T _m and the startup room temperature T _s ), and the compressor speed N _m . temperature
It is obtained from the temperature difference between T _set and room temperature T _s at startup.
Further, FIG. 7 is also a diagram for explaining the control of FIGS. 3 to 5 described above by giving concrete numerical values.

That is, the user can reach room temperature (target temperature
_Assuming that T _set ) is _set to 20 ° C., the operation controller of the air conditioner senses the room temperature from the time when the air conditioner is stopped, and if the room temperature drops to 9 ° C. at 5 o'clock the next day, the temperature difference (T _set −
T _s ) is 11 ° C., and the advance time Δτ ₀ is 15 minutes. However, if the operation is started here, the target temperature is reached at 5:15, and unnecessary operation is performed for 45 minutes until 6 o'clock, so the air conditioner does not start operation. If the room temperature drops to 7 ° C at 5:30, the advance time Δτ ₀ is selected with a temperature difference of 13 ° C, and if the advance time of 30 minutes is added to the current time of 5:30, the time is 6:00. Therefore, the air conditioner selects 3000 rpm of the compressor rotation speed N _m and starts the operation. At the same time, the branch temperature of 8 ° C is selected, so the air conditioner will start at room temperature T _s of 7 ° C and branch temperature of 8 ° C.
The compressor is continuously operated at 3000 rpm up to 15 ° C. of the branch room temperature T _m obtained by adding, and then full power operation (for example, 7000 rpm) is performed up to the target temperature of 20 ° C.

Here, the result of actually controlling the air conditioner and performing the start-up operation will be described.
Up to 1.3kwh with conventional control method
In contrast, the compressor rotation speed at startup is 4000 rpm and room temperature is 1
When operating up to 2 ℃ and full power operation after that, it was 1.03kWh, and a power saving effect of 21% was confirmed. It took 64 minutes.

In addition, when the air conditioner is shipped, table data as shown in FIG. 7 is prepared in the control unit in advance assuming a standard load, but the load in the actually installed room may be different. , As shown in Fig. 9, the advance time is corrected.

Specifically, in the first forward driving, as described above,
As a result of operation using the table data in Fig., When the room temperature has not reached the target temperature on time is corrected from the difference between the actual room temperature T _{'The set} target temperature T _set in timed as shown in FIG. 8 The time is selected and next time, it is added to the advance time Δτ ₀ selected from the data in FIG. 7.

When the room temperature reaches the target temperature before the scheduled time,
As shown in the figure, the correction case is selected from the difference between the scheduled τ _set and the time τ ′ _{set at} which the target temperature is actually reached, and next time, the correction time is subtracted from the advance time Δτ ₀ selected from the data in FIG. 7. Drive forward.

Even in this case, the same effect as that of the previous embodiment is expected.

In the above-described embodiment shown in FIGS. 1 and 2, the operation control of the compressor is performed in two stages, and the compressor is operated at a constant speed compressor rotation speed N _m up to the branch room temperature T _{m to} reach the branch room temperature T _m . After reaching the above, an example in which the compressor is operated at full power has been described, but it is also possible to finely control the operation control of the compressor in a plurality of stages of three stages or more.

As described above, according to the present invention, as can be seen from each of the embodiments, the number of revolutions of the compressor at the time of start-up and the number of revolutions at the time of start-up are larger depending on the magnitude of the temperature difference between the indoor temperature and the target temperature. By making the branch room temperature that switches to operation at the number of revolutions and the predicted advance time at which operation should start before the specified time proportionally larger, it is possible to accurately approach the target temperature at the specified time (scheduled time) and the above temperature difference. It is possible to perform power-saving operation according to the above.

[Effects of the Invention] As described above, according to the present invention, the target temperature can be set to the target temperature with the minimum amount of power at the designated time according to the size of the room and the room temperature at the time of startup, and the home air conditioning. It is possible to provide a forward-running operation control method for an air conditioner, which is highly effective in power saving, improvement in comfort, and usability when applied to control of an air conditioner or the like.

It is possible that the target temperature may not be reached at the specified time even with the minimum power consumption described above, but since the result of the previous operation is reflected, the target temperature will not be greatly deviated, and if the comfort is almost poor, In addition, since this result is reflected next time, in the next operation, it is possible to bring the temperature closer to the target temperature more accurately with the minimum electric energy at the specified time.

[Brief description of drawings]

FIG. 1 is a flow chart showing an operation algorithm of an operation control method for an air conditioner according to an embodiment of the present invention, and FIG. 2 is a diagram showing changes in room temperature with respect to time in the operation control method shown in FIG. , FIG. 3 and FIG. 4 are characteristic diagrams that derive the relational expression that gives the minimum electric energy, and FIG. 5 is a diagram showing a method of correcting the forward moving time when the load of the room changes,
FIG. 6 is a block diagram showing a configuration of a control device that realizes an operation control method for an air conditioner according to an embodiment of the present invention, and FIGS. 7 to 9 relate to another embodiment of the present invention. It is a table data figure used for a driving control method. 1 ...... indoor temperature sensor, 3 ...... operation control unit, 5 ...... data files, 6 ...... input unit, 7 ...... control target, T _s ......
Room temperature at startup, T _m …… Branch room temperature, T _set …… Target temperature, τ
_est …… On-time, Δτ ₀ …… Predicted advance time, Δτ ₀ ′…
… Actual required time, Δτ ₀ ″ …… Next advance time. N _m …… Compressor speed.

Claims (1)

[Claims] 1. A forward-running operation control method for an air conditioner, which starts an air conditioner at a time before a specified time so that the indoor temperature reaches a target temperature at a specified time. Depending on the magnitude of the temperature difference between the constant speed compressor speed at start-up and the operation at this constant speed compressor speed, The branch room temperature for switching to operation and the predicted advance time at which operation should start before the specified time are proportionally increased, and the sum of the predicted advance time corresponding to the sensed indoor temperature and the current time is specified as above. Start the air conditioner at the time, and if the room temperature does not reach the target temperature at the specified time,
A forward operating method for an air conditioner, characterized in that the forward operating time is corrected based on the difference between the actual operating time required to reach the target temperature and the forward operating time, and is used for the next operation.