JPH031034A - Control method for air conditioning device - Google Patents

Abstract

PURPOSE:To provide an air conditioning device which is suitable for quiet sleep operation and prevents an uncomfortable feeling from being exerted on a user by providing a selecting means to select first and second operation modes. CONSTITUTION:A selecting means 2 to select which of a first operation mode suitable for continuance of operation and a second operation mode suitable for operation during sleeping of a user, and a control part 3 to control blowers 9 and 12, a compressor 6, a 4-way valve 7, and an expansion valve 10 according to control signals transmitted from an operation content input part 1 and the selecting means 2 are provided. A protection control operation in the second operation mode disconnects, unlikely the first operation mode, a power source 4 to a compressor 6 instead of forced high speed rotation of the indoor blower 12. This operation is made so as to be suitable for running during sleeping of a user, and enables prevention of awaking of a user and production of an uncomfortable feeling due to noise and strong air occasioned by high speed rotation of the indoor blower 12 during sleeping.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a control method for protecting a compressor of an air conditioner.

(Conventional technology) Conventionally, in the heating operation of an air conditioner, the input current of the compressor is detected as a control to protect the compressor from overload, and the indoor blower is rotated at high speed according to the current value, or the indoor blower is There is a current release control that stops the blower or the compressor. In this conventional current release control, as shown in FIG. 5, when the compressor is started and the current value is less than Ia, the indoor/outdoor blower is operated continuously at a pressure of 8 m. When the load on the pressure a machine increases and the current value exceeds 1a, the outdoor blower is stopped and the heat absorption effect in the outdoor heat exchanger is reduced.

Reduces the load on the compressor.

When the current value further increases and exceeds Ib, the indoor ventilation is driven at high speed rotation to increase the heat dissipation effect in the indoor heat exchanger and reduce the load on the compressor. Even so, when the current value rises and exceeds Ic, the input power to the compressor is cut off and stopped to protect the compressor from damage due to overload.

(Problem to be Solved by the Invention) In current release control of conventional air conditioners, as a measure to reduce the load on the compressor, the indoor blower is operated at high speed. Since the sound generated when air is blown is large, if the system is operated in the safe + 11ti operation, which is applied and controlled while the user is sleeping, there are inconveniences such as the user waking up.

The present invention has been made in consideration of the above circumstances, and an object of the present invention is to provide a method for controlling an air conditioner that is suitable for sleepy driving and does not cause discomfort to the user.

[Structure of the Invention] (Means for Solving the Problems) In the present invention, in order to solve the F-opening purpose, a compressor, an outdoor heat exchanger, an expansion valve, and an indoor heat exchanger are sequentially connected by refrigerant piping. a refrigeration cycle; a blower provided in each of the outdoor heat exchanger and the indoor heat exchanger in the refrigeration cycle; current detection means for detecting a $ flow value of input current to a compressor in the refrigeration cycle; A selection means for selecting an operation mode and a second operation mode is provided, and when the selection means selects the first operation mode, the current value detected by the current detection means is read, and the current value is set to the first value. If the temperature exceeds that level, the indoor fan will be forced to rotate at high speed, and the current value will further increase.
When the current value exceeds the second value, the compressor is stopped, and when the second operation mode is selected, the current value detected by the current detection means is read, and the indoor blower is forced to speed up as the current value increases. The compressor is stopped when the current value exceeds a predetermined value without rotating the compressor.

(Function) According to such a configuration, when the first operation mode is selected by the selection means, when the input current value of the compressor exceeds the first value, the indoor blower is forced to rotate at high speed. It increases the heat dissipation effect in the indoor heat exchanger, avoids the overload condition of the pressure machine that occurs due to an excessive rise in the temperature of the indoor heat exchanger, and reduces the pressure aa1 when the first flow value exceeds the second value. to stop.

Further, when the second operation mode is selected by the selection means,
When the input 'th'lL value of the pressure am exceeds a predetermined value without forcibly rotating the indoor blower at high speed, the compressor is stopped.

Therefore, it is possible to select a first operation mode that emphasizes continuous operation of the compressor and a second operation mode that emphasizes indoor quietness and comfort, depending on the indoor situation.

(Real Ii color example) Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 4 is a block diagram showing the configuration of an air conditioner according to an embodiment of the present invention. The refrigeration cycle connected by A compression V & power supply 4 to be supplied, a current detection means 5 for detecting the current value of the input current of the compressor 6,
There is an operation content input section 1 for inputting operating means such as power supply, heating and cooling switching, set temperature, set wind violet, etc., and a first operation mode applied to continue operation, and a second operation mode applied when the user sleeps. The selection means 2 selects whether the air blower 9.12, the pressure 41Ml16, the four-way valve 7, the expansion valve 1.
It is composed of a control section 3 that controls 0, etc.

The operation of the protection control of the compressor in the air conditioner having two configurations as described above will be explained with reference to FIGS. 1, 2, and 3.

FIG. 1 is a flowchart showing the operation of protection control in this embodiment. First, in step 101, the operation content input section]
If it is determined that the power switch is on, the process proceeds to step 102, where it determines whether it is cooling or heating, and if it is not determined to be cooling, the process proceeds to step 103, where cooling control is performed, and whether heating is determined. If so, proceed to step 104.
Step 1: Read control contents such as set temperature, aX, first and second operation modes from operation contents input section 1 and selection means 2.
Proceed to step 05. In step 105, depending on the control details in step 104, indoor and outdoor ventilation fi12.9, s expansion valve i
o, start controlling the pressure mats source 4, etc., and proceed to step 10.
6, and in step 106, the current 1ii1 of the input current to the compression fi6 is detected by the current detection means, and depending on the magnitude of the current value ■, steps 107, 110, and 114 are performed.
．． 120 or 127 for control.

The control operations from step 106 onwards will be described below in conjunction with FIG. 3.

Note that FIG. 3 is an operation explanatory diagram showing the control contents corresponding to the current value I when the first operation mode is selected with the selector P12.

In step 106, when the current value I is at point m1 on the hysteresis line indicated by 31st], the current value ■ is detected as I < 10, and the process proceeds to Stella 7107, and the process proceeds to step 1°8. In step 108, the heating operation is performed as set. , step 109
The process proceeds to step 106, where 7 lags A=O are set to indicate that the current is on the hysteresis line in an upward loop from point m1, and the process proceeds to step 106 again, where the current value I is detected.

If I<II, the process advances from step 106 to Stella 1107 or step 110, returns to step 105, and repeatedly heats as set.

Here, when the current value ■ increases to rn 2 points on the hysteresis line, the current (a I is detected as 10 < I < II, and the process proceeds to step 110 and proceeds to step 111.

Check whether the input current is in a rising loop on the hysteresis line.
=O or not, it is A according to the previous step 109.
=O, so it is determined that A=O and step 108
, proceed to step 109, and return to step 106.

Here, when the current value ■ rises from point m2 to point m3 on the hysteresis line, the current value ■ at point m3 becomes It (1
(12 is detected, the process proceeds to step 115, and step 1
16, it is determined whether the driving mode is the second driving mode. In this case, since it is not the second operation mode, the process advances to step 117. In step 117, it is determined whether the flag is A=2.

In this case, since A=O in step 109, the process proceeds to step 112, stops the outdoor fan fi9, proceeds to step 113, sets the indoor blower 12 to the set air volume, proceeds to step 114, sets the flag to A=1, and causes the indoor blower 12 to stop.
In step 106, the heating control is continued while the
The current value I is detected. Here, when the current value 1 increases and rises from point m3 to point m4 on the hysteresis line, m4
The current value I at the point is detected as I2 < I < [3,
The process advances to step 121, and then to step 122, where it is determined whether the driving mode is the second driving mode.

In this case, it is not the operation mode of tube 2, so step 11
Proceed to Step 8, stop the outdoor ventilation tl19, and proceed to Step 11.
Proceed to Step 9, rotate the indoor fan 12 at high speed, and proceed to Step 1.
The process proceeds to step 20, where the flag is set to A=2, and the process returns to step 106, where the current value ■ is detected.

Here, when the current value I increases from point m4 to point m5 on the hysteresis line, the current value I at point m5 becomes I> 1
3 is detected, the process proceeds to step 128, and step 123
Proceed to stop the outdoor ventilation l19, proceed to step 124, activate the timer, proceed to step 125, turn off the power supply 4 to the pressure aa 16, and proceed to step 126, in step 126 it is determined whether or not the timer has ended. When it is finished, set the flag to A=O and step 105
Return to step 106 to restart heating.

Note that the flag is set to A=O because the current value becomes I<IO when the compression R6 is restarted after being stopped for a certain period of time.

In addition, from the m4 point on the hysteresis line, m6 is
If the current value I has dropped to a point II < 1 < 12, the current value I is detected as II < 1 < 12, and the process proceeds to step 115 and step 116, where it is determined whether the operation mode is the second operation mode. Therefore, the process proceeds to step 117, and it is determined whether the flag is A=2, and since A=2 from step 120, the process passes through steps 118 and 119, proceeds to step 120, sets the flag to A=2, and proceeds to step 106. return.

That is, hysteresis is provided in the control based on current detection.

Subsequently, when the current value I decreases to the m7 point and 10<l111 is detected, the process proceeds to step 110 and step 111, and it is determined whether the flag is A=O. In this case step 12
Since flag A=2 from 0, step 112
Then, the process proceeds to step 113 with the outdoor air blower 19 kept turned off, and the indoor fan 12 is changed from high speed rotation to the set rotation, and the process proceeds to step 114, where the flag is set to A=1 and the process returns to step 106.

Here, when the current value ■ decreases to the m8 point and I<10 is detected, the process proceeds to step 107 and step 108, returns to the initial setting control operation, and proceeds to step 109, setting the flag to A=O. Return to 106.

The above is the operation of the protective control when the first operation mode is selected by the selection means 2, and the m of the hysteresis line in FIG.
In the ascending loop from point 1 to point m5, the current value ■ is I (II
Until then, the initial setting control operation is performed, and when II<, 1<12, the outdoor blower 9 is stopped to reduce the heat absorption in the outdoor heat exchanger 8, thereby increasing the temperature of the refrigerant sent to the indoor heat exchanger 11. 4. Suppress overload caused by 4.

Then, when the current value I increases by 1 to 12 < 1 < 13, in addition to stopping the outdoor fan 9, the indoor fan 12 is rotated at high speed to increase the heat dissipation effect in the indoor heat exchanger 11. I (Compared to IZ, the temperature rise in the indoor heat exchanger 11 is further suppressed to avoid an overload state of the pressure w4 machine 6.

Furthermore, when the current value I increases to T>I3, the pressure 9
The input power to the fi 6 is turned off to protect the compressor 6.

Such protection control is preferably applied when continuation of heating operation is important.

FIG. 2 is an operation explanatory diagram showing the control contents corresponding to the current value I when the second operation mode is selected by the selection means 2. The operation of the protection control in the driving mode will be explained with reference to FIGS. 1 and 2.

Up to step 106, the process proceeds in the same manner as in the first operation mode described above.

Then, in step 106, the current value I of the input to the compression 116 is detected by the current detection means 5, and when the current value ■ is at point β1 on the hysteresis line, the current value I is I (To
is detected, the process proceeds to step 107 and step 108 to perform heating as set, and the process proceeds to step 109, where the flag is set to A=O to indicate that the system is in an ascending loop from point J21 to point J25, and operation is continued as set. Step 1
Return to 06.

Here, t flow fiflI is from point β1 on the hysteresis line to I
When the current value increases to 2 points, the current value I is detected as 10 <I il, and the process proceeds to step 110 and step tti, where it is determined whether the flag is A=O, and from step 109, A=O.
Therefore, it is determined that A=O, and the process proceeds to steps 108 and 109, and then to step 106, where the current value I is detected again. Continue. Here, the current value ■ changes from β2 point on the hysteresis line to β
When the current value increases to three points, the current value ■ is detected as II<1<72, and the process proceeds to step 115 and step 116.

In step 116, it is determined whether the operation mode is the second operation mode. In this case, since the operation mode is the second operation mode, the process proceeds to step 112, and the outdoor ventilation is turned on.
19 and proceed to step 113, indoor ventilation at
12 is rotated as set and proceeds to step 114, where the flag is set to A=1 and the process returns to step 106.

Here, when the current value ■ increases from point J23 to point β4 on the steresis line, the current value I is detected as I2 < 1 < 13, and the process proceeds to steps 121 and 122, where it is determined whether the operation mode is the second operation mode or not. In this case, it is the second operation mode, so the process goes to step 123, the outdoor blower 9 is stopped, the process goes to step 124, the timer is activated, and the process goes to step 125, where the input current to the pressure 1a machine is cut off. The process proceeds to step 126, where it is determined whether the timer has expired or not, and the compression 816 is stopped until the timer has expired, and when the timer has expired, the process proceeds to step 127.
The reason for setting A=O here is to cut off the power supply 4 and stop the compressor, so the next time the power supply 4 is input, the current value will be 1 (To
This is because.

Also, the current fIiI suddenly rises and is on the hysteresis line β.
If it reaches 5 points, it is detected as I-in-13, and step 1 is executed.
28, the process proceeds to step 129, where it is determined whether the operating mode is the second operating mode, and in this case, since it is the second operating mode, the pressure at
After stopping l16 for a certain period of time, the process returns to step 105 and heating is restarted.

Also, from point J23 on the hysteresis line, I
When the current value I has decreased to 26 points, the current value I is detected as IO(1(TI), and the process proceeds to step 110 and step 111. In step 111, it is determined whether the flag is A=0, and here, the current value I at point I23 is detected. In the control in the second operation mode, flag A=1 in step 114, and A=
Since it is not O, proceed to step 112, stop the outdoor blower 9, proceed to step 113, set the indoor blower 12 at the set rotation speed, proceed to step 114, set the flag to A=1, return to step 106, and check whether the current value I or 10 ( 1<I
Repeat the same steps until it is no longer I.

Here, when the hysteresis line decreases from 6 points to 7 points due to protection control, the current value ■ is set to I<
After detecting IO, the process proceeds to steps 107 and 108, where the control operation is returned to the initial setting, and the process proceeds to step 109, where the flag is set to A=O and the process returns to step 106.

The above is the operation of the protective control in the second operation mode.
Unlike the first operation mode, the indoor blower 12 is not forced to rotate at high speed, but ti4 to the compression 816 is turned off.

This is applied when the user sleeps, and trt
It is possible to avoid the noise caused by rotating the indoor fan 12 at high speed while sleeping, and avoid waking the user and discomfort caused by strong winds, and it is useful when comfort and quietness are important. .

Furthermore, in recent years, in the sound sleep mode applied while the user is sleeping, an increasing number of systems are setting the blown air to upward so that the air blown by the indoor blower 12 does not directly hit the user.

In such an air conditioner, overload and overcurrent are likely to occur in the sleep mode due to a reduction in the opening area of the air outlet during top blowing and an increase in ventilation resistance, so this embodiment is particularly effective.

In this embodiment, when the current value becomes II < I < I2 in the second operation mode, the outdoor blower 9 is stopped, and when II < 1, the compressor 6 is stopped. The outdoor air blower 11!9 may be stopped in the range of II <I <13, and the compressor 6 may be stopped in the range of I>13.

〔Effect of the invention〕

According to the present invention, when the first driving mode is selected,
When the input current value of the compressor exceeds the first value, the indoor blower is forced to rotate at high speed to avoid compressor overload, and when the input current value exceeds the second value, the pressure Bll & When the compressor is stopped and the second operation mode is selected, if the input current value of the compressor a exceeds a predetermined value, the compressor is stopped without forcing the indoor blower to rotate at high speed. Therefore, it is possible to select a first operation mode that emphasizes continuous operation of the compressor and a second operation mode that emphasizes indoor quietness and comfort.

[Brief explanation of drawings]

FIG. 1 is a flowchart showing the control operation of the air conditioner according to the embodiment of the present invention, FIG. 2 is an explanatory diagram of the operation corresponding to the current value in the first operation mode of the embodiment, and The figure is an explanatory diagram of the operation corresponding to the current value in the second operation mode of the same embodiment, Fig. 4 is a function block diagram of the air conditioner of the same embodiment, and Fig. 5 is a diagram of the conventional air conditioner. It is an operation explanatory diagram. 1...Operation content input section 3...Control section 5...Current detection means 9...Outdoor transmission! f & machine 2...selection means 4...compression a power supply 6...compressor 12...indoor blower

Claims (1)

[Scope of Claims] A refrigeration cycle in which a compressor, an outdoor heat exchanger, an expansion valve, and an indoor heat exchanger are sequentially connected by refrigerant piping, and a refrigeration cycle provided in each of the outdoor heat exchanger and the indoor heat exchanger in this refrigeration cycle. a current detection means for detecting the current value of the input current of the compressor; and a selection means for selecting a first operation mode and a second operation mode; When the operating mode is selected, when the current value detected by the current detection means exceeds the first value, the indoor blower is forced to rotate at high speed, and the current value further increases until it reaches the second value or more. When the compressor is stopped, and the second operation mode is selected, the current value increases without forcing the indoor blower to rotate at high speed in response to an increase in the current value detected by the current detection means. A method for controlling an air conditioner, characterized in that the compressor is stopped when the temperature exceeds a predetermined value.