JPS6071843A - Running control device of air conditioning device - Google Patents

Abstract

PURPOSE:To shorten the time for the actual room temperature to converge to the desired value even under the large load fluctuation during cooling or heating operation and consequently contrive to improve the responsiveness by a method wherein the width of step, by which the rotational frequency of a compressor is increased and decreased, is changed in response to the temperature deviation or the larger the temperature deviation between the actual room temperature and the desired value of room temperature is, the larger the width of step is made. CONSTITUTION:A first frequency setting signal generating means 21 generates the signal, which makes the change of the rotational frequency of a rotational frequency variable type compressor 3 larger in proportion to the magnitude of the temperature deviation. A second signal generating means 22 checks the generation of signal when the signal to change the rotational frequency in large scale is the zero signal, resulting in rotating the compressor 3 at its lowest rotational frequency. When the temperature deviation lies in a temperature region not exceeding the set value, a third signal generating means 24 checks the generation of the minimum signal and at the same time generates the zero signal. The compressor 3 is driven based upon the respective setting signals as mentioned above.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention provides an air conditioner equipped with a variable rotation speed compressor, in which the variable rotation speed compressor is rotated so that the actual room temperature converges to a set value. The present invention relates to an improvement of an operation control device for an air conditioner that performs numerical control.

(Prior Art) Conventionally, as an operation control device for this type of air conditioner, one disclosed in, for example, Japanese Unexamined Patent Publication No. 57-67735 is known. As shown in Fig. 10, the high-temperature zones (A) to (C)-3- and the low-temperature zones (D) to ( F), and a frequency setting signal (for example, "75Hz J, r65Hz
J-r35f-1z J and f'of-1z J) respectively, and for example, during cooling operation, each time the actual room temperature shifts from the zone to which it initially belongs (for example (A)) to the zone (C) near the set value. By using the frequency setting signal as a frequency corresponding to each zone and gradually lowering the rotational speed of the compressor one step at a time, the actual room temperature is converged to the set value.

However, in the conventional system mentioned above, the frequency setting signal, that is, the rotation speed of the compressor, is set in advance according to the temperature deviation between the actual room temperature and the room temperature target value, and the above temperature deviation is in the adjacent temperature range. At the time of transition, the speed at which the compressor increases or decreases the rotation speed is always one step at a time regardless of the temperature deviation, so if there is a large load fluctuation during cooling or heating operation, the temperature will converge to the target value. This has the drawback that it takes time to cool down, has poor responsiveness, and cannot provide comfortable cooling (heating).

(Object of the Invention) An object of the present invention is to change the step width by which the compressor increases or decreases the rotation speed according to the temperature deviation, without making the rotation speed of the compressor correspond to the temperature deviation from the target room temperature value. By increasing the step width when the temperature deviation from the room temperature target value is large, the time for the actual room temperature to converge to the room temperature target value can be shortened even when there is a large load change during cooling or heating operation. The objective is to improve its responsiveness.

Furthermore, if the step width of the compressor rotation speed change is set to be larger as the temperature deviation is larger, the compressor may change from medium or high rotation to low rotation, depending on the setting of the room temperature target value. It may stop immediately and may not be able to provide comfortable heating and cooling. For example, during cooling operation in which the cooling capacity is increased by driving the compressor at high speed, if the room temperature actually drops rapidly and reaches the room temperature target value, the rotation speed will increase, for example, by 1.
- 5 - Due to the step reduction, the cooling capacity will decrease slightly due to medium and high rotation speeds, but in reality the room temperature will further decrease and the temperature deviation will become wider (if this happens, the compressor will become medium and high rotation speeds due to the decrease of several steps). In this case, since the compressor stops immediately, it is not possible to quickly find a cooling capacity that balances the heat load, and the compressor's stopped state may cause inconvenience to the occupants. This is undesirable as it gives a pleasant sensation.To prevent this, for example, during cooling operation, if the actual room temperature drops more than the target room temperature value, the compressor is first rotated at the lowest rotational speed and then By continuing or stopping the rotation of the compressor in accordance with the actual room temperature changes, it is possible to find an appropriate cooling capacity at an early stage and to minimize the discomfort caused to occupants. The aim is to eliminate this issue in a proactive manner.

(Structure of the Invention) In order to achieve the above object, the structure of the present invention is as shown in FIG. - a temperature detection means (11), a room temperature setting means (17) for setting the room temperature target value (TV), and a temperature deviation (ΔT) between the actual room 1' (TS) and the room temperature target value (TV); A temperature range discriminating means (15) in which temperature ranges (Zl) to (Zl) are stored in advance, an actual room temperature signal of the room temperature detection means (11), a set value signal of the room temperature setting means (17), and a thirst mark region memory. Temperature range (71) to (Zl) of means (15)
Temperature region determining means (20) for determining over time in which temperature region the current temperature deviation (ΔT) is located based on ), and each time the temperature region discriminating means (20) detects the point in time when the current temperature deviation (6th) shifts to the adjacent drought trend region, the larger the current temperature deviation (ΔT), the higher the rotation speed. A first frequency setting signal generating means (21) that generates a frequency setting signal that greatly changes the rotation speed of the variable compressor (3), and a frequency setting signal of the first frequency setting signal generating means (21). Variable rotation speed pressure machine (3)
When the zero frequency setting signal is designed to significantly change the rotation speed of the variable speed compressor (
3) a second frequency setting signal generating means (22) for generating a minimum frequency setting signal to rotate the second frequency setting signal at the lowest rotation speed;
A timer (23) that starts measuring a predetermined time when the minimum frequency setting signal of the frequency setting signal generating means (22) is generated, and -1 warm mark area determining means (20) when the measurement by the timer (23) is completed. When it is determined that the current temperature deviation (ΔT) is in the temperature range (Z5) to (77) below the setting 1 m (Tv), the minimum frequency setting signal of the second frequency setting signal generating means (22) is a third frequency setting signal generating means (24) that prevents the occurrence of the zero frequency setting signal and generates a zero frequency setting signal; and the first to third frequency setting signal generating means (21), (22), and (24). A frequency conversion device (16) for rotationally driving the variable rotation speed compressor (3) based on a frequency setting signal, the rotation speed increases as the actual room temperature is wider than the set value (room temperature target value). When the rotation speed of the variable speed compressor is greatly increased or decreased -8- and the rotation speed is increased (lowered) by this increase or decrease and the variable speed compressor is to be stopped, -B for a predetermined period of time is required. After being rotated at the lowest rotational speed for a period of time, it is designed to stop only when the cooling or heating capacity is still large.

(Effects of the Invention) Therefore, according to the present invention, the step width by which the compressor increases or decreases its rotation speed is set to be larger as the temperature deviation from the set value is larger, and the step width is set based on this setting. If the compressor needs to be stopped immediately from a medium or high speed state by increasing the speed, the compressor is driven at the lowest speed per day, and if the capacity is still large in this state, the compressor is stopped. Therefore, even if there is a large load change during cooling or heating operation, the actual room temperature can be converged to the set value with good response, and the cooling and heating capacity that balances the heat load can be found early, and the occupants can It is possible to eliminate the discomfort caused by the air conditioner, thereby making it possible to enjoy even more comfortable heating and cooling.

(Example) Hereinafter, an example of the present invention will be described in detail based on the drawings.

Fig. 2 shows an embodiment in which the present invention is applied to a heat pump air-conditioning system, in which (1) is an outdoor unit and (2) is an indoor unit, where the outdoor unit (1) has a variable rotation speed type inside. Compressor (
3), four-way switching valve (8), expansion mechanism for heating and cooling (4a>,
(4b) and an outdoor heat exchanger (5).
) is equipped with an indoor heat exchanger (6) inside. The solenoid valve (SV) opens when the rotation speed of the compressor (3) is equal to or higher than a predetermined value, and closes when the rotation speed of the compressor (3) is lower than a predetermined value. Each of the devices (3) to (6) is connected by a refrigerant pipe (7) to form a closed circuit, and during cooling operation, the four-way selector valve (8) is turned on as shown by the solid line in the figure. (
By switching the refrigerant and circulating the refrigerant as shown by the solid line arrow in the figure, the amount of heat contained in the refrigerant is radiated to the outdoor air in the outdoor heat exchanger (5), and then the amount of heat is removed from the indoor air by -10 in the indoor heat exchanger (6). - While cooling the room by repeatedly absorbing heat, during heating operation, the four-way switching valve (8) is switched as shown by the broken line in the figure to circulate the refrigerant as shown by the broken line arrow in the figure, thereby transferring heat. In contrast to the above, indoor heating is performed.

The rotation speed of the variable rotation speed compressor (3) is controlled by a control device (10) shown in FIG.

That is, in the control device (10) of FIG.
) is a room temperature sensor composed of a thermistor with a negative resistance temperature characteristic for detecting room temperature, and (12) is the room temperature sensor (11).
) to convert the actual room temperature signal from analog to digital.
/D converter, (13) is an operation switch for setting the room temperature target value, and (14) is a plurality of lights that display the set value (TV) (room temperature target value) set by the operation switch (13). A set value display (15) consisting of light emitting diodes (14a) receives an actual room temperature signal from the room temperature sensor (11) and an operation signal from the operation switch (13), and displays the set value display (14). ) to the set value (Tv
A microcomputer (16) generates a frequency setting signal based on the flowcharts of FIGS. Based on the above variable speed compressor (
3) is an inverter that rotationally drives. Therefore, the room temperature sensor (11) constitutes a room temperature detection means, the operation switch (13) and set value display (14) constitute a room temperature setting means (17), and the inverter (16) constitutes a frequency conversion device. There is.

Moreover, inside the microcomputer (15),
As shown in Figure 4, the actual room 11! High temperature side region (Z+), (Z2 >, (Za), corresponding to the deviation ΔT (=TS - TV) between (TS') and the set value (Tv >
stable region (Z4) and low temperature region (Z5).

A leakage area consisting of (Za) and <Zy) is input and stored in advance, and the microcomputer (15) constitutes a leakage area storage means. Furthermore, as shown in FIG. 5, the microcomputer (15) has seven types of wave numbers (0, 30, 40, 50, 60, 70° 75
Steps N (N=1 to 7) are input and stored in advance.

Next, the operation of the microcomputer (15) will be explained. As shown in FIG. 6, the microcomputer (15) shows that the actual room temperature (Ts) decreases as shown by the broken line arrow during cooling operation, and the set value (Tv) decreases as indicated by the symbol ■ in the figure.
When it reaches and the deviation (ΔT) moves to the region (Z5), step N is lowered by one step, and it further descends until the actual room m (TS) reaches <TV-0.5℃ as shown by the symbol ■ in the figure. When the deviation (ΔT) moves from the region (Z5) to (Za), the step N is lowered by two steps, and the actual room temperature (TS) reaches <'rv-1,0°C as shown by the symbol ■ in the figure and moves into the region. (Za
) to (Zl), the step N is set to the minimum value "2", and on the other hand, the actual room temperature (TS) rises as shown by the solid arrow and reaches <TV +0.5°C as indicated by the symbol ■ in the figure. When the deviation (ΔT) shifts from the region (Z4) to the region (Za), the step N is raised by one step, and it further increases by -13- until it reaches <TV+1.0°C, as shown by the symbol ■ in the figure, and moves into the region. (z
When moving to 2), the step N is raised by two steps, and the actual room '14 (Ts) becomes Tv+1.5 as shown by the symbol ■ in the figure.
a first function that operates to set the step N to the maximum value "7" when the temperature reaches the temperature range (Zl);
When each of the above steps N changes, a timer of timer time (t) (for example, 3 minutes) is activated, and the temperature deviation (ΔT) is the same at the start and end of the time measurement and is in the stable region (Z4). ), the step N is kept unchanged, and when it is in the high temperature region (Zl) to (Za), it is changed to 1 to further improve the convergence to the set value (Tv).
There is a second function that operates to raise the stage and lower it by one stage when the temperature is in the low temperature region (Z5) to (Zl), and during the time measurement of the above timer, as shown in Fig. 7 (step N in the previous time).
Even if the room temperature actually changes due to the change process (see the symbol ■ in the figure) and the same step process as the previous process is performed again (see the symbol ■ in the figure), the third step that does not perform this step process Specifically, these operations are performed based on the operation start flow and frequency determination flow shown in FIGS. 8(a) and 8(b).

That is, in the flowchart of FIGS. 8(a) and 8(b) (S+ to 83B indicate step numbers), it is first determined in Sl whether or not the initial startup end flag F, which will be described later, is 11", and if NO, that is, At the first startup, Sl
After calculating the temperature deviation (ΔT) based on the actual room temperature signal of the room temperature sensor (11) and the set value (Tv) according to the operation signal of the operation switch (13), this is set at a predetermined temperature of 1m (T+> (for example, 1.5℃).Then, the temperature value (T1) or higher (TS-TV≧T+)
If YES, it is determined that rapid cooling operation is necessary, and in S3, step N is initialized to the maximum value "7" and a frequency setting signal of the highest frequency is output to the inverter (16). In S4, initial startup end flag F
is set to "1" and returns. On the other hand, in Sl, the temperature deviation (ΔT) is smaller than the predetermined temperature * (T+)
In the case of −15 − of o, the temperature deviation (Δc) further becomes “0” at 85
If NO is greater than or equal to "0", cooling operation is required, but it is determined that the heat load is small and rapid cooling operation is not necessary, and step N is intermediated in S6. After initially setting the value to, for example, "4" and outputting a frequency selection signal of an intermediate frequency (for example, 50 Hz) to the inverter (16), and setting the timer in S7 to start measuring a predetermined time (1), In S4, the initial startup end flag F is set to "1" and the process returns. In addition, if the temperature deviation (ΔT) is smaller than rOJ in S5 and is YES, it is determined that cooling operation is not required, and in S8 step N is set to "1", that is, the compressor (3) is kept in a stopped state. and return.

On the other hand, if the initial startup completion flag F is "1" (YES) in Sl, that is, after the cooling operation startup is completed,
In S9, it is determined whether the temperature deviation (ΔT) is rOJ or not, that is, the actual room m (TF, ) is set w1 (Tv
), and in the case of No, further at 810 the above-mentioned timer time (
It is determined whether or not the measurement in 1) has been completed, and if the measurement is completed (YES), it is determined that the temperature decrease to the set value (Tv) is gradual, and step N is set to the maximum value in Su. 7" and then returns. If the answer is No, where the measurement is not yet completed, step N is held as is and the process returns immediately. Also, in S9, the actual room 21 (T
If S) reaches the setting fill (Tv) (YES), step N is lowered by two steps in 812, and then the process returns.

Next time, the process proceeds to the frequency determination flow shown in FIG. 8(b) and starts the increase/decrease control in step N according to the actual room MA (Ts).

Then, in S13, the current temperature deviation (ΔT) is
After determining in which region the temperature range (Zl) to (zl) in the figure exists, it is determined whether the current temperature deviation (ΔT) is in the high concentration region (zl) to (z3). However, in the case of YES in the high concentration side region (Zl) to (Z3), it is further determined in S14 whether or not the measurement of the timer time (1) has been completed -17-. If the determination is NO that the measurement is not completed, the temperature range (2+
> with the temperature range (Zi') to which the temperature deviation (ΔT') found in the previous process belongs, and determine whether the current humidity deviation (ΔT) has shifted from the temperature range (Z4) to the range (Z3) for the first time. If the result is YES, step N is increased by one step in S16, and a timer is set in S17 to start measuring the timer time (1), and the process returns. On the other hand, N does not move to area (Z3) in SL5.

In the case of , the current thermal deviation (Δ
It is determined whether or not T) has moved from area (Z3) to area (zl) for the first time, and if YES that it has moved to area (Zl), S1 is also responsible for raising step N by two steps at S +s.
Set the timer at 7 and return. In addition, if No in S18 to not move to the area (Zl), further S t
At o, the current m-maro deviation (ΔT) first reaches the area (Zl
) to the area < Z+ ), and if YES, step N is set to the maximum value [7]. , If the answer is No, the process returns immediately.

On the other hand, if YES is determined in S14 that the measurement of the timer time (1) has been completed, step N is increased by one step in 822, and the timer is set in 823 and the measurement of the timer time (1) is started. Return.

In addition, in the case of NO in S13 where the current temperature deviation (ΔT) is not in the Toritsu side region (Zl) to (Z3), S
At 24, the current temperature deviation (ΔT) is in the stable region (74
), and ☆ YE in the window area (Z4).
In the case of S, it is determined that step N is appropriate and returns immediately, while in the case of No, which is not in the stable region (Z4), the current temperature deviation (6 teeth) is in the low temperature region (Z5) ~ (
Zl) and proceeds to 825.

Next, in S25, it is determined whether or not the measurement of the timer time (1) has been completed. If NO, the measurement is not completed, further in 82B, the temperature deviation (ΔT) -19- is changed from the area <Z4) to the area for the first time. It is determined whether or not the transition has been made to <z5), and if the transition is YES, it is further determined in S27 whether or not step N is "3" or more, and "3" is determined.
If the answer is YES, the step N is lowered by one step in the S field, and then the timer is set in S29 to start measuring the timer time (1) and return. on the other hand,
If the number is smaller than "3", step N is determined by subtraction.
is determined to be "1", that is, the compressor is in a stopped state, and the step N is set to the minimum value of "12" in S30, and then the timer is returned to CEL+-L in S29. In addition, in the case of No in 828 that does not shift to the area (Z5), the current humidity deviation (ΔT
) has shifted from the area (Z5) to the area (Z6) for the first time. If YES, it is further determined in step 832 whether or not step N is "4" or more.
” If YES, step N in S
After lowering the value by two steps, a timer is set at 829 and the process returns. On the other hand, in the case of No smaller than "4" -
20- Step N becomes “1” by subtraction, that is, the compressor (
3) is in a stopped state and sets step N to the minimum value "2" in 834, sets a timer in 829, and returns.

Furthermore, in 831, the No.
In the case of , it is further determined in S35 whether the current temperature deviation (8T) has shifted from the region (Z6) to the region (Zl) for the first time, and in the case of YES that it has shifted, step N is set to the minimum value in 836. After setting the value to “2”,
In step 29, the timer is set and the process returns, while if No, the process does not move to the area (Zl), the process returns immediately.

Furthermore, if the determination of the timer time (1) is completed in 825 and YES, the process proceeds to step N in S37.
is lowered by one step, and the timer is set at 83B, and then the process returns.

Therefore, in S13, the i-plane region (Zi) to which the current temperature deviation (ΔT) belongs is determined, and Sea, Sea.

By determining whether or not the current humidity deviation (8T) has shifted to the adjacent 2fl area at 820, 828, S3+ and S forces, it is possible to determine which temperature area the current temperature deviation is in. It constitutes a partial region determining means (20) that determines over time and detects the point in time when the current temperature deviation shifts to an adjacent temperature region. Also, the actual room temperature (
When TS) reaches the temperature indicated by the symbol ■ in Fig. 6, step N is increased by one step (Sea, 816), and the temperature indicated by the symbol ■
When the temperature reaches , step N is increased by two steps (Sea
, Sea ), and when the temperature of symbol ■ is reached, step N should be set to the maximum value "7" S2a +
821), on the other hand, the actual room ff1(Ts) has the code ■
When the temperature reaches , step N is lowered by one step (82B
, 82B), and when the temperature reaches the symbol ■, lower the temperature by two steps (
S31.533), and when the temperature with code ■ is reached, the minimum value r2J is set (S35.5se). The first frequency setting signal generation means (21) generates a frequency setting signal that changes the rotation speed of the variable rotation speed compressor (3) more greatly as the temperature deviation of the rotation speed variable compressor (3) increases. Also, in the case of YES that the temperature deviation (6 teeth) has shifted from the temperature range (Z5) to (76) at -22-8g+, step N is
4", the two-stage sieving process ('833) is not performed and step N is set to the minimum value "2" in 834, so that step N is the rotation of the variable rotation speed compressor (3). If the number is locked out to "1" and a zero frequency setting signal is generated, the generation of the zero frequency setting signal is prevented, and the variable rotation speed compressor (3) A second frequency setting signal generating means (22) is configured to generate a minimum frequency setting signal for rotating the motor at the minimum rotation speed. Furthermore, after setting step N to the minimum value "2" in Sγ, 829
By setting the timer in , a timer (23) is constructed which starts measuring the predetermined time (1) when the minimum frequency setting signal of the second frequency setting signal generating means (22) is generated. In addition, the temperature deviation (8T) after setting the timer in S29 is in the high temperature side region (Zl) ~
(Z3) and if it is not in the stable region, that is, the low temperature side -23
- If it is in the area (Z5) to (Zl), it is determined in 825 that the timer time (1) measurement has been completed, and if the measurement is completed (YES), step N is lowered by one step and changed to "1". By doing this, if it is determined that the current temperature deviation (ΔT) is in the temperature range below the set value (TV), that is, in the low temperature side range (Z5) to (Zl), when the measurement of timer time (1) is completed, , the second frequency setting signal generation circuit (2
2) prevents the generation of the frequency setting signal from
A third frequency setting signal generating means (24) is configured to generate a zero frequency setting signal.

Next, an example of the operation of the above embodiment will be explained based on FIG.
While operating the compressor (3) as
) decreases and reaches the set value (Tv), step N decreases by one step and becomes "5" (828) (at this time, measurement of timer time (1) is started (829)), so
The rotational speed of the compressor decreases slightly, and the degree of decrease in room temperature (Ts) actually slows down somewhat. And, actual room 1 (TS
> reaches the temperature (T-24-V-0.5℃), step N is lowered by two steps and becomes
3'' (S33), and the rotational speed of the compressor (3) decreases significantly. As a result, even if the actual room temperature (Ts) rises and the measurement of the timer time (1) is completed thereafter, if the actual room 21 (Ts) is in the temperature range (74), step N changes. No (S2a), li1 degree (T
v+0.5° C.), the step N increases by one step to "4"(S's), and the degree of hot eruption becomes gentle. After that, if the temperature is still in the temperature range (Z3) after the timer time (1) has elapsed, the step N increases by one step to "5" (S22), and the actual room m (Ts) is set to the set value (Tv ) begins to descend. If the temperature is in the temperature range (Z4) after the timer time (1) has elapsed, step N remains unchanged (824) and the actual room '4A
When (Ts) reaches the set value (Tv), step N
is lowered by one level to [4] (S28), and the degree of decrease in room temperature becomes gradual. If the temperature is still in the temperature range (Z5) when the timer time (1) has elapsed, the step N becomes "3" (837), so the actual room 111if
i(TS) begins to rise slowly again and reaches the setting of 1m(Tv
). In this way, during cooling operation,
High temperature side region (zl) to (Z3) and low temperature side region (Z5
) to (Zl), the temperature deviation (
6) is large, the change range of step N is large, so if there is a large load fluctuation, the set value ('Tv)
You can significantly reduce the time it takes to reach
High temperature side area (71) to (Z3) and low temperature side area (Z5
) to (Zl), the temperature deviation (Δ
Since the change width of step N is small in the temperature range (Z3 >, (Z5)) where T) is small, the actual room am(Ts)
can be converged to the set value (Tv) with good stability.

Furthermore, the actual room temperature (TS>) changes from the set value (T
v ) and then the temperature range (Z5) to (Z6
), the step N is normally lowered by two steps, but if that value is smaller than "4", that is, when that calculation is performed, it becomes "1" and the compressor (3) goes into operation. If the rotation is to stop immediately from a high speed rotation state, the calculation is not performed and the minimum value "2" is used.
(834), the compressor (3) is once driven to rotate at the lowest rotation speed. And after that,
When the timer time (1) elapses, the actual room temperature (TS)
is still in the low temperature region (z5) to (z7), step N is set to [1] for the first time (S37
), the compressor (3) will stop, and as the compressor (3) rotates at the lowest rotational speed, the cooling capacity will be insufficient and the actual room temperature (TS> will exceed the set value (Tv )). If the temperature rises, normal step N increase control is performed according to the temperature deviation (ΔT), so it is possible to quickly find the cooling capacity that balances the heat load, and the compressor (
3) can be prevented from immediately stopping from the medium speed rotation state, and the discomfort caused to the occupants in the room can be eliminated.

In addition, although the above-mentioned embodiment describes the case where it is applied to the cooling operation of a heat pump type air-conditioning device, the present invention can be similarly applied to its heating operation or a heating or -27- cooling-only device. Of course. In this case, the stable region in heating operation may be set to the low temperature region side of the set value (Tv >
Further, the increase/decrease in step N may be set to be opposite to that during cooling operation.

Furthermore, in the above embodiment, a stable region (Z4) is set in which the step N is not changed, but this stable region (Z4) is preferable in that convergence to the set value (Tv) can be performed with good stability. However, in the present invention, the stability region (Z
4) does not necessarily need to be set; the point is that step N may be changed more greatly when the temperature deviation (ΔT) from the set value is larger.

In addition, it goes without saying that the present invention is not limited to the beat pump type air conditioner as in the above embodiment, but can be similarly applied to various other types of air conditioners. .

[Brief explanation of drawings]

Fig. 1 is a block diagram showing the configuration of the present invention, Figs. 2 to 9 show embodiments of the present invention, and Fig. 2-28- is a refrigerant piping system diagram when applied to a heat pump air-conditioning device. FIG. 3 is a block diagram showing the internal configuration of the control device, FIGS. 4 and 5 are diagrams each showing the memory contents of the microcomputer, FIGS. 6 and 7 are diagrams each showing the operation of the microcomputer, and FIGS. Figures (a) and (b) are flowcharts explaining the operation of the microcomputer, Figure 9 is an explanatory diagram showing how the actual room temperature converges to the set value, and Figure 10 is the zone and frequency setting signal showing the conventional example. FIG. (3)... Variable rotation speed compressor, (11)... Room temperature sensor (room temperature detection means), (15)... Microcomputer (also I! degree area storage means), (16)... - Inverter (frequency conversion device), (17)...Room temperature setting means, (20)...Temperature range discrimination means, (21)...
・First frequency setting signal generation means, (22)...Second frequency setting signal generation means, (23)...Timer, (24)
)...Third frequency setting signal generation means. Figure 8 (a)

Claims (1)

[Claims] (1) In an air conditioner equipped with a variable rotation speed compressor (3), a room temperature detection means (11) for detecting the indoor temperature and a room temperature setting means (17) for setting a room temperature target value (Tv >
) and the temperature range tiffl(Z+) corresponding to the temperature deviation (ΔT) between the actual room temperature (TS) and the room temperature target value (Tv).
Wet surface area storage means (15) in which ~(Z7) is stored in advance
The current temperature deviation ( 11&area discriminating means (20
), and each time the temperature range discriminating means (20) detects the point at which the current temperature deviation (ΔT) shifts to an adjacent temperature range, the larger the current temperature deviation (ΔT), the faster the rotation speed increases. a first frequency step constant signal generating means (21) that generates a frequency setting signal that greatly changes the rotation speed of the variable number compressor (3); and a first frequency setting value generating means (
21) When the frequency setting signal is a zero frequency setting signal designed to greatly change the rotation speed of the variable rotation speed compressor <3>, generation of the zero frequency setting signal is prevented, and the rotation speed is increased. a second frequency setting value generating means (22) that generates a minimum frequency setting signal for rotating the variable compressor (3) at a minimum rotational speed; and a minimum frequency setting of the second frequency setting value generating means (22). A timer (23) starts measuring a predetermined time when a signal is generated, and when the timer (23) completes measurement, the temperature range determining means (20) determines that the current temperature deviation (ΔT) is below the set value (Tv). If it is determined that the temperature is in the temperature range (75) to (Z7), the generation of the minimum frequency setting signal of the second frequency setting value generating means (22) is prevented, and the zero frequency -2- setting signal is generated. The third frequency setting signal generating means (24
), and the first to third frequency setting signal generating means (2
Operation of an air conditioner characterized by comprising a frequency converter (16) that rotationally drives the variable rotation speed compressor (3) based on the frequency setting signals of 1>, (22), and (24). Control device.