JPS593652B2 - air conditioner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a controller for an air conditioner.

In a heat pump air conditioning system, a temperature sensor detects the temperature of indoor air sucked into an indoor unit, and the indoor temperature is adjusted by turning on and off a compressor based on the output of the temperature sensor.

Furthermore, in hot air blowers that use gas or oil as fuel, the indoor temperature is similarly adjusted by controlling the combustion of the fuel based on the output detected by the temperature detector.

By the way, the temperature control of these conventional air conditioners fixes the temperature difference between the upper and lower sides detected by the temperature detector, that is, the differential, so the temporal delay of the compressor operation and the temperature of the air conditioned space are fixed. Various conditions such as changes in air flow, indoor temperature distribution, and the blowing direction of conditioned air cause large temperature swings at the location where people live indoors, making it difficult to constantly adjust the temperature to the optimal temperature. be.

This also applies when adjusting the indoor temperature.

In view of this point, it is an object of the present invention to provide a controller for an air conditioner that does not have the above-mentioned drawbacks and has excellent control characteristics.

FIG. 1 is a block diagram showing the configuration of a separate heat pump air-conditioning system to which the present invention is applied.

In the figure, 1 is the indoor unit, 2 is the outdoor unit, and 3 is the indoor unit.
is a compressor, 4 is a four-way valve that switches the direction of refrigerant, 5 is an outdoor heat exchanger (evaporator for heating, condenser for cooling), 6 is a fan motor for the outdoor heat exchanger, 7 is a throttle valve for heating , 8 is a cooling check valve.

9 is an indoor heat exchanger (condenser for heating, evaporator for cooling)
, 10 is a fan motor for an indoor heat exchanger, 11 is a cooling throttle valve, and 12 is a heating check valve.

13 is a temperature or humidity detector provided at the indoor air intake port of the indoor unit 10, and 14 is a controller of the present invention that controls the compressor 3 based on the output of the detector 13.

The figure shows cooling, and the refrigerant coming out of the compressor 3 passes through the four-way valve 4 and is condensed in the outdoor heat exchanger 5, and the cooling check valve 8
The pressure is reduced by the cooling throttle valve 11 through the fox indoor heat exchanger 9.
It evaporates and returns to the compressor 3 through the four-way valve 4.

The detector 13 detects the temperature or humidity of the indoor air sucked by the indoor fan motor 10 and transmits the output to the controller 1.
4, and the controller 14 controls the on/off of the compressor 3 and its drive.

FIG. 2 shows a hot air fan using gas or oil as fuel, to which the present invention is also applied.

In FIG. 3, 15 is a case of the indoor unit, 16 is a combustor having a burner 1T therein, and 18 is a double pipe that supplies combustion air to the combustor 16 and discharges combustion gas.

19 is a fuel supply pipe for the combustor 16, and 20 is a valve that adjusts the amount of fuel supplied.

A temperature detector 21 detects the temperature of indoor air sucked in by the blower 22, and a controller 23 is operated by the output of the detector 21 to control the valve 20.

The present invention includes a detector that detects one or both of indoor air temperature 3 and humidity, and a controller main body (hereinafter abbreviated as controller) that controls a heat source device based on the output of the detector, The controller includes a signal change rate detection unit that detects a change rate of the signal of the detector at a set value of temperature or humidity, a time setter that sets a time based on the signal of the signal change rate detection unit, and a and a heat source controller that controls the heat source device based on a signal from the time setting device and a signal from the time setting device. , which attempts to temporally control the heat source device by the rate of change (rate of change) of temperature or humidity at a predetermined temperature or humidity setting value, and Fig. 3 shows its basic configuration. ing.

In the figure, 24 is a detector for detecting indoor temperature or humidity, which corresponds to 13 in FIG. 1 and 21 in FIG. 2.

25 is a controller, which corresponds to 142 in FIG. 1 and 23 in FIG.

26 is a heat source device, which corresponds to the compressor 3 in FIG. 1 and the combustor 16 in FIG. 2.

The temperature or humidity signal detected by the detector 24 is sent 31 to the signal change rate detection section 27.

The signal change rate detection unit 21 detects the signal change rate at a predetermined temperature or humidity setting value (or a value in the vicinity thereof), and sends a signal corresponding to this change rate to the time setting device. be.

The time setter 28 sets a time according to this signal and sends it to the heat source controller 29, and the heat source controller 29 receives the time signal from the time setter 28 and the temperature or humidity signal from the detector 24. The heat source device 26 is controlled based on the following.

That is, it controls switching on/off (or high speed and low speed) of the compressor 30 or opening/closing (or throttling) the valve 20.

FIG. 4 shows a specific embodiment of the invention.

In the same figure, the heat source controller 29 in FIG. It is configured to compare the signal of the detector 24 with a reference signal and control the heat source device 26.

Further, the signal change rate detection section 27 in FIG. A signal is sent to a time setting device 37 (28 in FIG. 3), and the time setting device 37 is configured to send its output to the heat source control section 31.

That is, in this embodiment, the reference signal generator 38
The first comparator 30 is shared by both the signal change rate detection section 27 and the heat source controller 29 in FIG.

Next, the operation of this controller 25 will be explained in the case of temperature control with respect to the apparatuses shown in FIGS. 1 and 5.

At time t during cooling. Suppose that the detected temperature has reached T□.

At this time, the output of the comparator 30 is sent to a heat source controller 31, and an operating device 32 consisting of a triac switch means.
Then, the heat source device 26 (compressor 3) is operated.

Therefore, the detected temperature decreases as shown by the solid line in FIG.

Also, the oscillator 34 is caused to oscillate. When the temperature decreases from T1 to T2, the comparator 35 sends an output to the oscillation controller 33,
The oscillation controller 33 stops the oscillation of the oscillator 34.

That is, the oscillator 34 oscillates for a period of time Δt1 in FIG.

The number of output pulses from this oscillator 34 is counted by a counter 36 and sent to a time setter 37.
determines the time ts1 for operating the compressor 3.

tsl is determined, for example, by the following calculation formula.

tsl -α+βΔt1 However, when the constant time ts□ elapses and the temperature drops to T3, the heat source controller 31 turns off the operating section 32 and stops the compressor 3, so the temperature rises again and becomes T□ again. Return to

38 is a reference signal generator for setting the operating temperature.

By freely adjusting this reference signal from outside the device, the operating temperature can be changed.

If more sophisticated control is required, the constant β in the calculation formula may be adjusted.

In Fig. 5, the score 2 indicates that the air conditioning load is large, that is, the time Δt2 for the temperature to drop from T1 to T2 is Δt2.
In this case, the time ts2 during which the compressor 3 is driven is longer than tsl.

FIG. 6 is a diagram showing another embodiment of the apparatus of the present invention, in which the one in FIG. 5 controls the on-time of the compressor 30, while the one in FIG. 6 controls the off-time. It's in control.

In the figure, T1 is the temperature at which the compressor 3 turns off, and Δr1 is the time during which the oscillator 34 is oscillating, that is,
This is the time for the temperature to rise from T1 to T2.

Δts1 is the time during which the compressor 3 is stopped, and T3 is the temperature at which the compressor 3 starts driving.

Dotted line and Δt2. ts2 is a case where the air conditioning load is large, which is the same as in the case of FIG.

The control method shown in FIG. 6 is preferable during cooling.

FIG. 7 shows an embodiment of a more sophisticated control method that incorporates both the control methods shown in FIG. 5S and FIG.
This time is determined as the time to turn off the compressor 3, t'sIK is determined by the time Δt1 for the temperature to drop from T2 to T1, and this time is used to turn on the compressor 3.

T3 is the temperature at which the compressor 3 starts driving, and T4 is the temperature at which the compressor 3 stops driving.

Note that the dotted line S and Δt2. ts2tΔi'2 + j'
s2 is a case where the air conditioning load is large, as in the case of FIGS. 52 and 6.

In the third embodiment described above, the magnitude of the rate of temperature change can be determined by measuring the time Δt□ or Δt2 during which the detected temperature changes by a certain minute temperature difference, and by measuring the time Δt1 or Δt2 during which the temperature changes. However, the present invention is not limited to this means, and for example, it is also possible to detect a temperature change within a certain minute time and use it as the magnitude of the temperature change rate.

The control method of the present invention can be implemented in the same way for a hot air fan as shown in FIG. 2, and can also be implemented in the same way for humidity control.

Furthermore, if a microcomputer or the like is used as the controller 25, it can be implemented simply and easily.

By performing fine-grained temperature S and humidity control for heating and cooling the air-conditioned space, we can improve the conventional control method described at the beginning, which has large swings in temperature and humidity, and achieve comfortable optimal temperature and humidity. It has an excellent retention effect.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the structure of an embodiment of a heat pump type air conditioning system to which the present invention is applied, and FIG. 2 is a diagram showing the structure of an embodiment of a hot air fan to which the present invention is applied. FIG. 3 is a block diagram showing the basic configuration of the controller of the present invention, and FIG.
This figure is a block diagram showing one embodiment of the specific configuration shown in FIG. 3, and FIGS. 5 to 7 are graphs explaining the operation of the apparatus of the present invention. 3...Compressor, 13...Detector, 14
...Controller, 16...Combustor, 20.
... Valve, 21 ... Temperature detector, 23
...Controller, 24...Detector, 25.
...Controller, 26...Heat source device, 27...
...Signal change speed detection unit, 28...Time setting device, 29...Heat source controller, 30, 35...
... Comparator, 31 ... Heat source controller, 32 ...
...Operator, 33...Oscillation controller, 34.
...Oscillator, 36...Counter, 37.
...Time setting device, 38...Reference signal generator.

Claims (1)

[Claims] 1. A device comprising: a detector that detects one or both of indoor air temperature and humidity; and a controller body that controls a heat source device based on a signal from the detector; The controller main body includes a signal change rate detection unit that detects a change rate of the signal of the detector at a set value of temperature or humidity, a time setter that sets a time based on the signal of the signal change rate detection unit, and the detection unit. and a heat source controller that controls the heat source device based on a signal from the heat source device and a signal from the time setting device. 2. The heat source controller includes a reference signal generation section that generates first and second reference signals, and a reference signal generation section that generates the first and second reference signals, and
a first comparator for comparison with a reference signal; and a heat source control unit for controlling the heat source device based on the output of the first comparator, and the signal change rate detection unit , the first comparator S and the second comparator that respectively compare the two reference signals and the signal of the detector, an oscillator whose oscillation is controlled by the outputs of the two comparators, and an output of the oscillator. and a counter for counting, and the output of the counter is configured to be sent to the time setting device as a signal change rate signal.
Air conditioner described in section