JPH0727393A - Controller for air-conditioner - Google Patents

Abstract

PURPOSE:To calculate the number of revolutions of a compressor which obtains comfortable humidity by fuzzy logic operation on the basis of a comfortability index and a rate of index changes with time. CONSTITUTION:A controller for an air-conditioner has a comfortability calculating means 8 for computing a comfortability index on the basis of a temperature of air in a room, a mean radiation temperature, a water vapor pressure, air velocity and the clothes resistances, metabolic rates and workloads of occupants staying in the room, and a fuzzy operation means 11 for computing the number of revolutions of a compressor, which obtains comfortable humidity by fuzzy logic operation on the basis of the comfortability index and a rate of index changes with time.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for a reheat dry type inverter driven air conditioner having a reheat portion in an indoor heat exchanger.

[0002]

2. Description of the Related Art In a conventional air conditioner, when performing a dry operation, a compressor is driven at a constant rotation speed to perform dehumidification. In the room, the range (comfort zone) that the occupant feels comfortable changes depending on the room temperature and the humidity as shown in FIG. 7.

The comfort index (PMV value or PMV * value) of a person in the room varies greatly depending on the radiation temperature in the room, the wind speed, the amount of clothes of the person in the room, and the like. Nevertheless, the conventional air conditioner always controls the compressor at a constant rotation speed in the dry operation (dehumidification) as described above.
For this reason, depending on the surrounding environment, the user may be out of the comfort zone, which hinders the comfort of the occupants.

[0004]

As described above, since the conventional air conditioner control device always controls the compressor at a constant rotation speed during the dry operation (dehumidification), the surrounding environment. Depending on the location,
There was a problem of impairing the comfort of the occupants.

The present invention has been made in view of the above circumstances,
An object of the present invention is to provide a control device for an air conditioner that can perform a dry operation (dehumidification) so that the comfort of the person in the room can always be maintained even if the surrounding environment changes.

[0006]

DISCLOSURE OF THE INVENTION The present invention is a reheat dry type inverter driven air conditioner having a reheat portion in an indoor exchanger, the temperature of the indoor air, the average radiation temperature, the water vapor pressure, the wind speed and the presence of the room. Means for calculating a comfort index based on the wearer's clothing resistance, metabolic rate, and work load, and compression to obtain comfortable humidity by fuzzy logic operation based on the comfort index calculated by this means and its temporal change rate And a means for calculating the number of revolutions of the machine.

[0007]

First, the comfort level calculating means calculates the comfort level index based on the indoor air temperature, the average radiation temperature, the water vapor pressure, the wind speed, and the clothing resistance, metabolic rate, and work rate of the person in the room. Then, based on the comfort index calculated by the comfort calculation means and the temporal change rate thereof, the number of revolutions of the compressor for obtaining comfortable humidity is calculated by the fuzzy calculation means,
The rotary motor of the compressor that controls the dehumidification amount is driven.

By controlling the number of revolutions of the compressor based on the comfort index as described above, it is possible to perform dry operation (dehumidification) while maintaining a comfortable feeling for the occupants.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a control block diagram of an air conditioner according to an embodiment of the present invention. As shown in FIG. 1, the clothing resistance CLO (m ² ° C.) of the occupant set by the clothing resistance setting means 1 is set.
/ W), the metabolic rate (W / m ² ) of the occupant set by the metabolic rate setting means 2, the work rate W (W / m ² ) of the occupant set by the work rate setting means 3, room temperature Room temperature Ta (° C.) detected by the detection means 4 and average radiation temperature Tr in the room detected by the average radiation temperature detection means 5
(° C.), the indoor wind speed Var (m / s) detected by the wind speed detecting means 6, and the indoor water vapor pressure Pa (Pa) detected by the water vapor pressure detecting means 7 are input to the comfort level calculating means 8. The comfort index, that is, the PMV value or the PMV * value P is calculated from the PMV logic or the PMV * logic known in.

PMV calculated by the comfort level calculating means 8
The value or PMV * value P is input to the comfort level storage means 9 and stored therein, and at the same time, input to the subtractor 10. The subtractor 10 compares the PMV value or the PMV * value stored in the previous sampling input from the comfort degree storage means 9 with each other, and calculates the temporal change rate ΔP of the PMV value or the PMV * value. This time change rate ΔP and PMV value or P
The MV * value P is input to the fuzzy calculation means 11. Then, the fuzzy operation means 11 performs a known fuzzy logic operation based on the control rule input from the control rule storage means 12, thereby calculating the fuzzy distribution Δf of the increment of the compressor rotation speed.

This fuzzy distribution Δf is input to the defuzzification means 13 and is quantized here to obtain:
The increment ΔF of the setting variable F of the compressor speed is obtained. This increment ΔF is input to the adder 14 and is added to the setting variable F of the compressor rotation speed obtained at the previous sampling, which is input from the setting variable storage means 15 here.
The setting variable F for the current compressor rotation speed is calculated by adding it to the setting variable F for the current compressor rotation speed. The setting variable F is stored in the setting variable storage means 15 and, at the same time, is output to the rotary motor (not shown) of the compressor that regulates the dehumidification amount via the compressor rotation speed command means 16.

Next, the operation of the above embodiment will be described. 2 is a membership function of the fuzzy variable corresponding to the comfort index (PMV value or PMV * value) P, FIG. 3 is a membership function of the fuzzy variable corresponding to the temporal change rate ΔP, and FIG. 4 corresponds to ΔF. It is the figure which showed the membership function of a fuzzy variable.

Further, the control rule storage means 12 stores the following control rules. Rule 1: IF P = NB, ΔP = NB THEN
ΔF = NB Rule 8: IFP = ZO, ΔP = ZO THEN
ΔF = ZO Rule 11: IFP = PS, ΔP = PS THEN
ΔF = PS Rule 12: IF P = PS, ΔP = ZO THEN
ΔF = PS Rule 14: IF P = PB, ΔP = ZO THEN
ΔF = PB (Rules 2, 3, 4, 5, 6, 7, 9, 10, 13, 1
2, 3, 4, and the control rule, NB is large in the negative direction, NS is small, ZO is zero, PS is small in the positive direction, and P is small.
B means large in the positive direction.

First, the fuzzy operation in the fuzzy operation means 11 will be described. The calculated PMV * value is P
1 and the temporal change rate is ΔP1. P for rule i
When the membership function of the MV * value P is Ai1 and the membership function of the temporal change rate ΔP is Ai2, the fitness Wi of each rule is represented by the following equation (1).

Wi = Ai1 (P1) ΛAi2 (ΔP1) (1) (where Λ is min) Increment Δ of the setting variable F of the rotation speed of the compressor related to rule i
If the membership function of F is Bi, PMV * value P
The increment ΔF1 by 1 and the time change rate ΔP1 is the value of the center of gravity of Δf1 calculated by the equation (2).

[0016]

[Equation 1]

(However, V is max.) The setting variable F for the number of revolutions of the compressor is given by the sum of ΔF1 and the setting variable F'for the number of revolutions of the compressor at the previous sampling.

Next, with reference to FIG. 5, the operation amount calculation process at the start of the dry operation (dehumidification) in the intermediate period will be described. FIG. 5 is a diagram showing a process of calculating the operation amount at the start of the dry operation (dehumidification).

Here, the PMV * value P is P2, and the temporal change rate ΔP is ΔP2. Further, in FIG. 5, (a)
Is the flow of rule 11, (b) is the flow of rule 12,
(C) shows the flow of rule 14, the mountain is P, Δ from the left.
The evaluation function of P and ΔF is shown. Then, the mountain inside ΔF indicates ΔF evaluated by the conformity of each rule, and the mountain on the right side represents a composite output distribution of each rule.

The rule used in this case is rule 1
1, the rule 12, and the rule 14, the fitness W11, W12, and W14 of these rules have the following values from the equation (1). W11 = 0.5Λ0.4 = 0.4 W12 = 0.5Λ0.6 = 0.5 W14 = 0.5Λ0.6 = 0.5 The output distribution Δf2 is Δf2 = [W11 · B11] V from the equation (2). [W12 / B12] V
It is calculated by [W14 / B14]. The membership function B11 of ΔF for rule 11 is PS, the membership function B12 for rule 12 is PS, and the membership function B14 for rule 14 is PB.

Here, the output distribution of Δf2 is as shown at the right end of FIG. 5, and the increment ΔF2 of the setting variable F for the rotational speed of the compressor is the center of gravity of the output distribution Δf2. As described above, when the dry operation (dehumidification) is started in the middle period or the like, by increasing the rotation speed of the compressor, it is possible to increase the dehumidification amount as shown in FIG. 7 and quickly enter the comfort zone.
Further, in order to maintain a comfortable state, it is possible to adjust the dehumidification amount by increasing or decreasing the rotation speed of the compressor.

Next, referring to FIG. 6, dry operation (dehumidification)
The operation amount calculation process inside will be described. Here, the PMV * value P is P3, and the temporal change rate ΔP is ΔP3. The rules corresponding to this state are rule 8 ((d) of FIG. 6) and rule 12 ((e) of FIG. 6). The suitability W8 and W12 of the rules 8 and 12 are expressed by the following equations.

W8 = 0.8Λ1.0 = 0.8 W12 = 0.2Λ1.0 = 0.2 The output distribution Δf3 is obtained by the following equation.

Δf3 = [W8 · B8] V [W12 · B12] The membership function B8 of ΔF for rule 8 is Z
O, membership function B12 for rule 12 is PS. Therefore, the output distribution of Δf3 is as shown in the lower part of FIG. The increment ΔF3 of the compressor rotation speed setting variable F is the center of gravity of Δf3.

As described above, when the PMV * value P reaches a comfortable state of almost zero, the setting variable F of the rotation speed of the compressor hardly changes, and P is maintained by keeping the dehumidification amount constant.
It is possible to keep the MV value at zero. This makes it possible to maintain a comfortable state in a good condition.

[0026]

As described above in detail, according to the present invention, in the dry operation (dehumidification), the temperature of the indoor air, the average radiation temperature, the water vapor pressure, the wind speed, the clothing resistance of the person in the room, the amount of metabolism, the amount of work. Based on the comfort index, the comfort index is calculated based on this comfort index and the temporal change rate, and the comfort level is improved by operating the rotation speed of the compressor that changes the dehumidification amount by fuzzy logic operation. It is possible to maintain.

[Brief description of drawings]

FIG. 1 is a control block diagram of an air conditioner according to an embodiment of the present invention.

FIG. 2 is a diagram showing a membership function of comfort level according to the embodiment.

FIG. 3 is a diagram showing a membership function of a temporal change rate according to the example.

FIG. 4 is a diagram showing a membership function of a compressor frequency increment according to the embodiment.

FIG. 5 is a diagram showing a process of calculating an operation amount at the start of dry operation (dehumidification) according to the embodiment.

FIG. 6 is a diagram showing a process of calculating an operation amount in a normal dry operation (dehumidification) according to the embodiment.

FIG. 7 is a characteristic diagram showing states of a conventional dry operation (dehumidification) and a dry operation (dehumidification) of the present invention in a comfortable zone viewed from room temperature and humidity.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Clothing resistance setting means, 2 ... Metabolism setting means, 3 ... Work amount setting means, 4 ... Room temperature detection means, 5 ... Average radiation temperature detection means, 6 ... Wind speed detection means, 7 ... Water vapor pressure detection means, 8 ...
Comfort degree calculating means, 9 ... Comfort degree storing means, 10 ... Subtractor,
11 ... Fuzzy operation means, 12 ... Control rule storage means,
13 ... Defuzzification means, 14 ... Adder, 15 ... F storage means, 16 ... Compressor rotation speed command means.

Claims (1)

[Claims] 1. In a reheat dry type inverter driven air conditioner having a reheat portion in an indoor exchanger, temperature of indoor air, average radiation temperature, water vapor pressure, wind speed and clothing resistance, metabolic rate of occupants, Means for calculating a comfort index based on the amount of work, and means for calculating the number of revolutions of a compressor that obtains comfortable humidity by fuzzy logic operation based on the comfort index calculated by this means and the temporal change rate thereof An air conditioner control device comprising: