JPS6071844A - Running control device of air conditioning device - Google Patents

Abstract

PURPOSE:To enable to restart the titled device without giving any sense of over- cooling or over-heating to room-occupants by a method wherein, when restarting is intended, a compressor is driven at the predetermined lower rotational frequency, which is lower than the rotational frequency at its initial start. CONSTITUTION:A computing means 21 computes the temperature deviation between the actual room temperature and the desired value of room temperature based upon the actual room temperature signal sent from a room temperature detecting means 11 and the signal sent from a room temperature setting means 17, when a temperature detecting means 20 of restart detects the restart of the titled device. A frequency setting signal generating means 22 compares the temperature deviation with the predetermined value. When the temperature deviation is smaller than the predetermined value, the signal corresponding to the minimum frequency is generated, while when equal to or larger, the signal corresponding to the intermediate frequency is generated. A rotational frequency variable type compressor 3 is driven at the minimum or intermediate rotational frequency based upon the minimum frequency setting signal or intermediate signal generated by the signal generating means 22.

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 configured to converge the actual room temperature to a target room temperature value. The present invention relates to an improvement in an operation control device for an air conditioner that controls the rotational speed of the air conditioner.

(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. This item, as shown in Figure 9,
The high temperature side zones (A) to (C) and the low side zones (D) to (F
) are set respectively, and a frequency setting signal (for example [75 ) IZJ, r65H
2J...r351-1z J, rOHz J) respectively, and for example, during cooling operation, the frequency changes 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. The actual room temperature is made to converge to the target room temperature value by gradually lowering the rotational speed of the compressor one step at a time using the setting signal as a frequency corresponding to each zone.

By the way, for example, when the actual room temperature becomes lower than the room temperature target value due to cooling operation, the compressor operation stops [L, and then the compressor restarts when the actual room temperature naturally rises above the room temperature target value again. At startup, like the previous version above,
It is conceivable to rotate the compressor using a frequency setting signal corresponding to the zone to which the temperature deviation belongs at that time, that is, to restart the compressor with the same cooling capacity as at the time of initial startup.

However, indoors when the compressor restarts = 3
− The state is that once the actual room temperature has reached the room temperature target value, the structures and equipment around the room have been sufficiently cooled, and therefore the cooling capacity for restarting is Doing the same thing as when starting up has the disadvantage that it tends to give the occupants a feeling of overcooling.

Moreover, it is not preferable in terms of energy saving.

(Objective of the Invention) The object of the present invention is to provide occupants with a feeling of overcooling or overheating by rotating the compressor at a predetermined low rotational speed, which is lower than that at the time of initial startup, at the time of restart. The purpose is to restart the air conditioner without any trouble and provide comfortable cooling or heating while saving energy.

(Structure of the Invention) In order to achieve the above object, the structure of the present invention is as shown in FIG. (11) and a room temperature setting means (17) for setting the room temperature target value (TV).
), a restart detecting means (20) for detecting the restart, and a restart detecting means (20) for detecting the restart when the restart detecting means (20) detects the actual temperature of the room temperature detecting means (11). a calculation means (21) for calculating the temperature deviation (ΔT) between the actual room temperature (Ts > and the room temperature target value (TV)) based on the room temperature signal and the setting value signal of the room temperature setting means (17); Temperature deviation (ΔT
) is compared with a predetermined value (T1), and if it is smaller than the predetermined value (T1), a frequency setting signal corresponding to the minimum frequency is set.
A frequency setting signal generating means (22) which generates a frequency setting signal corresponding to the intermediate frequency when the frequency is equal to or higher than a predetermined value (T1), and a minimum frequency setting signal or an intermediate frequency setting signal of the frequency setting signal generating means (22). and a frequency conversion device (16) for rotating the variable rotation speed compressor (3) to a minimum rotation speed or an intermediate rotation speed, respectively, so that when restarting, the compressor is driven to a predetermined minimum rotation speed according to the temperature deviation. Or, it is designed to be driven to rotate at an intermediate rotation speed.

(Effects of the Invention) Therefore, according to the present invention, at the time of restart, the compressor is rotated at a predetermined minimum or intermediate rotation speed -5- which is lower than that at the time of initial start-up, so that occupants in the room are not overcooled or Cooling or heating operation can be performed without giving a feeling of overheating and while saving energy, thereby enabling comfortable heating and cooling while reducing heating and cooling costs.

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

Figure 2 shows an embodiment in which the present invention is applied to a heat pump type air-conditioning system, in which (1) is an outdoor unit, (2) is an indoor unit, and 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 an open circuit, and during cooling operation, the four-way switching valve -6- (8) is connected to the refrigerant pipe (7). By switching the refrigerant as shown by the solid line and circulating the refrigerant as shown by the solid arrow in the figure, the heat contained in the refrigerant is radiated to the outdoor air in the outdoor heat exchanger (5), and then transferred to the indoor air in the indoor heat exchanger (6). The room is cooled by repeatedly absorbing heat from the air, while during heating operation the four-way switching valve (8)
By switching the refrigerant as indicated by the broken line in the figure and circulating the refrigerant as indicated by the broken line arrow in the figure, the exchange of heat is reversed to heat the room.

The variable rotation speed compressor (3) is controlled by a control device (1).
The rotation speed is controlled by 0).

The control device 10) has an internal configuration as shown in FIG.
12) is an A/D converter that converts the actual room temperature signal from the room temperature sensor (11) from analog to digital, (13) is an operation switch for setting a target room temperature value, and (14) is the operation switch ( Setting value set by 13) (King V)
A set value display consisting of a plurality of light emitting diodes -7- (14a)... that lights up and displays (room temperature target value), (15) is the actual value converted into digital from the A/D converter (12). Upon receiving the operation signal from the room temperature signal operation switch (13), the set value display (14) lights up the setting (m (TV)) and displays the settings in Fig. 8 (a), (b) and (
A microcomputer (16) that generates the frequency setting signal shown in the flowchart in c) rotates the variable rotation speed compressor (3) based on the frequency setting signal from the microcomputer (15). This is an inverter that Therefore, the room temperature detection means is activated by the room temperature sensor (11), and the operation switch (13) and the set value display (
14) constitutes a room temperature setting means (17), and the inverter (16) constitutes a frequency conversion device.

Moreover, inside the microcomputer (15),
As shown in FIG. 4, the high temperature side region (Z+ >, (Z2 >, (Zs),
stable region (Z4) and low temperature side region (Zs).

-8- The thirst region consisting of (Z6) and (Zy) is input and stored in advance, and the operating frequencies of the variable rotation speed compressor (3) shown in Fig. 5 are set to 7 types (0゜30.40
．． Steps N (N=1 to 7) divided into 50, 60, 70, 751-1z) are input and stored in advance.

Next, the operation of the microcomputer (15) will be described for the case of cooling operation. The microcomputer (15) has a first function of setting the rotation speed of the compressor (3) to a predetermined value at the time of initial startup and restart, and as shown in FIG. During operation, the temperature decreases as shown by the dashed arrow, and when the set value (TV) is reached and the deviation (ΔT) moves into the range (Zs) as indicated by the symbol ■ in the figure, the step N is lowered by one step, and the temperature further decreases until the actual room temperature is reached. (Ts) is like the symbol ■ in the figure <TV-
When the temperature reaches 0.5℃, the deviation (ΔT) changes from the area (Zs) to (Z
When moving to 6), step N is lowered by two steps, and the actual room temperature (TS > reaches <TV-1, 0°C as shown by the symbol ■ in the figure, and the temperature shifts from the region (Z6) to -9- to (Zy). In this case, set step N to the minimum value “2”.
'', and on the other hand, the actual room temperature (S) rises as shown by the solid arrow, reaching <TV+0°5℃ as shown by the symbol ■ in the figure, and the deviation (ΔT) changes from the region (74) to the region (Zs). When the transition occurs, the step N is raised by one step, and it further increases to TV +1. Reach OoC and enter the area (7
When moving to 2), step N is increased by two steps, and when the actual room m (TS) reaches <Tv+1.5°C as shown by the symbol ■ in the figure and moves to region (71), step N is increased to the maximum value. 7", and when each step N changes, a timer for timer time (1) (for example, 3 minutes) is activated, and the local deviation ( ΔT) belongs to the same humidity region and the stable region (
74), the step N is kept unchanged, and when it is in the Hatto side area 11i (Z+) to (Z3), it is raised by one step to further improve the convergence to the set value (TV). , a third function that operates to lower the temperature by one step when the temperature is in the low temperature region (Zs) to (Zy), and a third function that operates to lower the temperature by one step when the timer is in the low temperature region (Zs) to (Zy). Even if the actual room temperature changes due to (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 44th function that does not perform this step process is also set. Specifically, these operations are performed based on the operation start flow and frequency determination flow shown in Fig. 8 (a), (b), and (c) (see Fig. 8 (a), (b)). ) and (c) middle S1-834
and 5A-8F indicate step numbers).

That is, at the start of operation [1-] in FIG. 8(a),
First, in Sl, the initial startup end flag F, which will be described later, is set to "1".
”, and if No, that is, at the first startup,
In S2, the set value (Tv) is determined according to the actual room temperature signal of the room temperature sensor (11) and the operation signal of the operation switch (13).
After calculating the temperature difference (ΔT) based on the above, it is compared in magnitude with a predetermined temperature value (T+) (for example, 1.5° C.).

And the part! a(T + ) or more (TS-Tv≧T+
> If YES, rapid cooling operation is required.
11- After making a judgment and initializing step N to the maximum value "A" in S3 and outputting the frequency setting signal of the maximum frequency to the inverter (16), the initial startup end flag F is set to "1" in S4. and return. On the other hand, if the temperature difference (ΔT) is smaller than the predetermined temperature value (T1) in 82, the temperature difference (ΔT) is further determined in S5.
Determine whether or not is smaller than “0”, and if No
In this case, 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 initialized to an intermediate value, for example, "4" in S6, and the inverter (16) After outputting a frequency setting signal of an intermediate frequency (for example, 50H2), and setting a timer to start measuring a predetermined time (1) in S7, the initial startup end flag F is set to "1" in S4. Return.

In addition, if the temperature deviation (ΔT) is smaller than [0] in S5, it is determined that cooling operation is not required, and S8
In this step, step N is set to "1", that is, the compression *(3) is maintained in a stopped state, and the process returns to -12-.

On the other hand, if the initial startup end flag F is "1" (YES) in Sl, that is, after the cooling operation startup is completed, S
9, whether the temperature deviation (6th door) is "0" or not, that is, the actual room 11iK (TS') is changed to the set value (T
It is determined whether the timer time (1) has been measured or not, and if No, it is further determined at S+o whether or not the measurement of the timer time (1) has been completed, and if the measurement is completed and YES, the set value is It is judged that the temperature decrease to (Tv ) is gradual, and the step N is increased to the maximum value of 17'' at Sn and then the return is made.If the measurement is not completed yet and the answer is No, the step N is held as it is. Return immediately.

Also, in S9, the actual room 1 (Ts) is set to the set value (TV
), in the case of YES, step N is lowered by two steps in S12, 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 m (Ts ).

Then, in SA, it is determined whether step N is "1", which corresponds to stopping the compressor for the first time, and Y
In the case of ES, it was determined that the compressor (3) was stopped, a restart timer was set at 8B, and measurement of the timer time, that is, the restart prevention time (to) of the compressor (3) was started. Will return later. On the other hand, step N is “1” for the first time.
”, in the case of No, it is determined whether N=1 in Sc, and in the case of YES, it is determined in So that the measurement of restart prevention time (to) is completed, and if the measurement is not completed, If so, please return immediately.

On the other hand, if YES in SD, that is, when rebooting, a predetermined value (Tv) corresponding to the actual room temperature signal of the room temperature sensor (11) and the operation signal of the operation switch (13) is set in SE.
Actual room 1 based on and! (TS) and setting 1 (Tv)
After calculating the temperature deviation (ΔT) from
8T) with a predetermined value Tα (for example, 0.5° C.). If YES is smaller than the predetermined 1 dl (Tα), the process immediately returns. Conversely, if No is larger than the predetermined 111 (Tα), the temperature deviation (ΔT
) is compared in magnitude with a predetermined -14- value (T+) (for example, 1.5°C).

If YES is smaller than the predetermined value (T1), S
In c, the C step N is initialized to the minimum value "2", while in the case of NO greater than a predetermined value (T1), the step N is initialized to an intermediate value, for example "4", in SH.

Thereafter, in S■, a timer is set and measurement of timer time (1) is started, and then the process proceeds to SHa.

In addition, if N is not 1 in Sc, that is, if it is not at the time of restart, the current temperature deviation (ΔT) at 813 in FIG.
After determining which region of Zl) it is in, the current temperature deviation (ΔT) is determined as i! i% warm side area )~(
It is determined whether or not the temperature is in the high temperature side region (Zl) to (Z3).
In the case of YES in Z3), it is further determined in 814 whether or not the measurement of the timer time (1) has been completed.

If the measurement is not completed (No), the temperature range (Zi) to which the current temperature deviation (ΔT) belongs is determined at S+s.
The current temperature deviation (ΔT') is compared with the temperature range (Zi') of the temperature deviation (ΔT') obtained in the previous process.
It is determined whether T) has shifted from the temperature range (Zi) to the range (Z3) for the first time, and if YES, it is 816.
After incrementing step N by one step, a timer is set in S17 to start measuring the timer time ([), and the process returns. On the other hand, in the case of NO in S15 not to shift to the region (Z3), it is further determined in S+a whether the current m-eating deviation (ΔT) has shifted from the region (Z8) to the region (Z2) for the first time; YE moved to area (Z2)
In the case of S, step N is increased by two steps at SHs, and then a timer is set at S17 and the process returns.

In addition, in the case of No that does not result in a transition to the area (72) in S+a, it is further determined whether the current temperature deviation (8T) in Sn has transitioned from the area (Z2) to the area (Zl) for the first time, and the transition is made. If the answer is YES, the step N is set to the maximum value "7" and then the timer is set in Say, and the process returns. If the answer is NO, the process returns immediately.

On the other hand, in S14, the timer time (t) is measured by -16
- If YES, the step N is increased by one step in 822, and the timer is set in 823 to start counting the timer time (1), and then the process returns.

In addition, in the case of NO in which the current temperature deviation (ΔT) is not in the high temperature side region (Zl) to (z3) in S13, S
At 24, the current temperature deviation (ΔD) is in the stable region (Zi
), and determine whether YE is in the stable region (Zi).
In the case of S, it is determined that step N is appropriate and the process immediately returns. On the other hand, in the case of NO which is not in the stable region (Zi), the current temperature deviation (ΔT) is in the low temperature region (z5) ~
(Zl) and proceeds to 825.

Subsequently, 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 826, the temperature deviation (ΔT) has reached the region (
It is determined whether or not the area (Zi) has transitioned to the area (Z5). If YES, the step N is lowered by one step in SU, and then the timer is set in S28, and the total of the timer time (1) is - 17- Start measurement and return. On the other hand, in the case of No in S2s that does not shift to the area (Z5), the current temperature deviation (ΔT) changes from the area (25) for the first time in 829 to the area (
z6), and if it is YES, step N is lowered by two steps at 830, and then
At step 28, a timer is set and the process returns. Also,
If the answer in 829 is No that the temperature does not shift to the region (Z6), it is further determined in 831 whether the current temperature deviation (ΔT) has shifted from the region (Z6) to the region (z7) for the first time, and if YES that the shift has occurred, it is determined. In this case, step N is set to the minimum value "2" at step 832, and then the timer is set at S and returns, while the area (Zl)
If the answer is No, the process returns immediately.

Furthermore, in the case of YES in step 825, which means that the timer time (1) measurement has been completed, step N is lowered by one step in 833, and the timer is set in 834, and then the process returns.

Therefore, by determining whether or not it is a restart in S-18-A and Sc of the frequency determination flow in FIG. 8 (b), the restart detection means ( 20), and when the restart detection means (20) detects the restart, that is, when the determination in Sc is YES, the SE and SF
Calculating means that calculates the temperature deviation (ΔT) between the actual room temperature (S) and the room temperature target value (TV) at the time of restart by excluding the temperature deviation (ΔT) (=Ts − Tv) at (21). In addition, by comparing the magnitude of the temperature deviation (6 teeth) in SF with the predetermined 1lII (T1), setting the step N in Sc to the minimum value, and setting the step N in SF to the intermediate value, the temperature deviation <ΔT) can be calculated. The predetermined value (a
The frequency setting signal generating means (22) is configured to generate a minimum frequency setting signal when the frequency is smaller than (T+) (however, ΔT≧0) and to generate an intermediate frequency setting signal when the frequency is greater than or equal to a predetermined value (T1). ing.

Therefore, in the above embodiment, the temperature deviation (ΔT) is set to a predetermined value (T+>(for example, 1.
5℃) or higher, the step N is set to the maximum value "7" (S3), while when it is smaller than the predetermined value (m(T1)), the step N is set to the intermediate value "4" (Sc). The air conditioner (3) is rotated at the maximum rotation speed or an intermediate rotation speed to start the cooling operation for the first time.Then, in step N, based on the flowchart of FIG. 8(c), the room temperature target value (Tv > Temperature deviation 〈ΔT
), and when the actual room temperature (TS) converges to the room temperature target value (Tv>), it is set to 11'' and the compressor (3) is stopped.

Then, with the stop of the compressor <3), the actual room temperature (Ts
When the compression 11 (3) is restarted in a state where > naturally rises to −F and becomes higher than the room temperature target value (Tv ) and the restart prevention time (tO) has elapsed, the temperature deviation from the room temperature target value (TV ) (ΔT) is smaller than the predetermined value (T1), step N is different from the value at the time of initial startup (i.e., the intermediate value of 14") and is set to a smaller minimum value of 12" (Sc >On the other hand, if the temperature deviation (ΔT) is a predetermined value (10(T)
1) In the above cases, the compressor (3) is set to a value smaller than the value at the time of initial startup (i.e., the maximum value "7"), such as the intermediate value [4], so the compressor (3) is set to the minimum or intermediate rotation speed. It is rotated and the cooling capacity becomes smaller than when it is first started. Therefore, it is possible to comfortably cool the occupants in the room without giving them a feeling of overcooling, and it is also possible to save energy and reduce cooling costs.

In the above embodiment, the case where the present invention is applied to the cooling operation of a heat pump type air-conditioning/heating device has been described, but it goes without saying that the present invention can be similarly applied to the heating operation or to a device exclusively for heating or cooling. It is.

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

[Brief explanation of drawings]

Figure 1 is a block diagram showing the configuration of the present invention, Figure 2-21
- Figures 8 through 8 show embodiments of the present invention, Figure 2 is a refrigerant piping system diagram when applied to a heat pump air conditioning system, and Figure 3 is a block diagram showing the internal configuration of the control device. Figures 4 and 5 are diagrams showing the memory contents of the micro combi coater, Figures 6 and 7 are illustrations of the operation of the microcomputer, respectively, and Figures 8 (a), (b), and (c) are FIG. 9 is a flowchart explaining the operation of the microcomputer, and is a diagram showing the correspondence between zones and frequency setting signals in a conventional example. (3)... Variable rotation speed compressor, <11)... Room temperature sensor (room temperature detection means), (16)... Inverter (
Frequency conversion device @), (17)...Room temperature setting means, (2
0)...Detection means at restart, (21)...? i# rod means, (22)...frequency setting signal generating means. -22- Figure 4 Delivery 6M Figure 5; T-Fri LC- Figure 7 Figure 10 Procedural correction tooth (method) February 6, 1980 Waka (Mr. Kazuo Koto, Commissioner of the Patent Office, Case) Indication of 1982 Patent Application No. 182468 2 Name of the invention Operation control device for air conditioner 3 Relationship with the case of the person making the amendment Patent applicant address 1-12-39 Umeda, Kita-ku, Osaka-shi, Osaka Prefecture No. New Hankyu Pill Name (285) Daikin Industries Co., Ltd. Representative Yama [1] Representative Minoruo ・550 !06 (445), 2128 January 11, 1980 (shipment date 59.1.31) 6, Figure 10-1-7 of the drawing to be amended, "Figure 10" of the content drawing of the amendment is corrected to "Figure 9" in red ink on the attached amended drawing (copy). 8. List of attached documents (1) Corrected drawing (copy) 1 copy - 2 - Figure 4 Figure 5 Figure 6 Figure 7 Meeting diagram

Claims (1)

[Claims] (1) In an air conditioner equipped with a variable rotation speed compressor (3), a room temperature detection means (11) for detecting indoor temperature and a room temperature setting means (17) for setting a room temperature target value (Tv).
and restart detection means (20) for detecting restart.
When the restart time detection means (20) detects the time of restart, the actual room temperature (
A calculating means (21) for calculating the temperature deviation (6 pieces) between the room temperature target value (Tv) and the room temperature target value (Tv), and comparing the concentration deviation (6 pieces) of the calculating means (21) with a predetermined value (T+), The predetermined value (
-1- a frequency setting signal generating means (22) that generates a frequency setting signal corresponding to the minimum frequency when the frequency is smaller than T1) and a frequency setting signal corresponding to the intermediate frequency when the frequency is greater than or equal to a predetermined value (T1); a frequency conversion device m (16) for rotationally driving the variable rotation speed compressor (3) to a minimum rotation speed or an intermediate rotation speed based on a minimum frequency setting signal or an intermediate frequency setting signal of the setting signal generating means (22); An operation control device for an air conditioner, comprising: