JPS5946437A - Temperature and humidity control method for air conditioner - Google Patents

Abstract

PURPOSE:To make it possible to control the temperature and humidity in a room to the levels pleasant to a human body by a simple structure by a method wherein the operating conditions of a blower and a compressor with respect to the room temperature are controlled sequentially. CONSTITUTION:An initial OFF point T1OFF is taken at a point lower than the room temperature by an allowable temperature width Tc for a forced compressor operation, a temperature DELTAT is taken at a point higher than the OFF point so as to make that point an initial ON point T1ON and a cooling operation is performed with the blow of the maximum air quantity by an indoor blower during the time in which the room temperature TR drops down to T1OFF. The above-mentioned temperature width Tc can be an index of load and therefore, when the room temperature TR after a lapse of a time ts is lower than T1ON, the next operation time is determined to be t1 and when higher, the next operation time is corrected to t1+ DELTAt. Then when the compressor has run into an ordinary operation condition and the room temperature TR has reached the T1OFF point before the time t1 lapses, the operation of the compressor is stopped and the next operation time t2 is determined to be t1-DELTAt but when the room temperature TR is still higher than T1OFF after a lapse of the time t1, the operation of the compressor is stopped and the next operation time t2 is determined to be t2=t1. Thus the same process is repeated and when the number of revolutions of the compressor comes to a predetermined value N, the above-mentioned ON point is made equal to the room temperature TR in the initial stage and the above-mentioned OFF point is taken at a point lower than the ON point by DELTAT so that the operation and stoppage of the compressor are performed in a repetitive fashion.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method for controlling temperature and humidity in an air conditioner.

The configuration of the conventional example and its problems The basic and typical mechanism of the temperature and humidity control g4+ of the conventional air conditioner will be explained with reference to FIG. In the same figure,
Thermostat settings i' that Ushizu users can set arbitrarily
Based on l'li'1 degree TT, the ON point TON and OFF point T are set with a constant disoare/noyal ΔT above and below it.
oyy is set. If the operation switch is turned on when the room temperature Ti is TR>TOFF, cooling operation is performed until TR=TOFF, then the air conditioner is stopped and TR=Ton'.
When the room temperature rises by -4- at J, operation starts again.

By the way, when the temperature is high and humid like in midsummer, the conventional control described above allows a comfortable temperature of around 7 cm to be obtained, and at the same time, the evaporator 1a1, which normally falls below the dew point temperature of the indoor air during cooling operation, As a result of dehumidification,
A reduction in relative humidity will result in greater comfort.

However, when the temperature is low and humid, such as at a seamount, the room temperature TR is
<TOFF> In such cases, the air conditioner does not operate despite the discomfort caused by high humidity. Even if there is a case where TR>TOFF, the operating time is short because the temperature difference is small, and the engine may be stopped before sufficient dehumidification is performed. If the setting temperature TT is lowered by 1 degree, sufficient operating time will be secured and the dehumidification effect will be sufficiently accelerated, but the room temperature will drop too much due to long-term cooling operation, and other problems may occur. This will increase the pleasure.

A conventional air conditioner that eliminates these drawbacks and can perform dehumidification without lowering the room temperature will be described with reference to FIG. The refrigerant circuit is a compressor5. Condenser 6° Cooling pressure reducer 7. Sub-condenser 1. It is constructed by connecting a dehumidifying pressure reducer 2° and an evaporator 8, and each of the Yamashiro pressure reducers 2° and 7 has a bypass circuit having two-way valves 3 and 4 in the middle. When the temperature is high, switch to the 4th direction valve.
By closing the second two-way valve 3 and opening the second two-way valve 3, a normal cooling refrigerant circuit is formed. When the temperature is low, first open valve 4,
By closing the second two-way valve 3, high-pressure and high-temperature refrigerant flows through the sub-condenser 1. At this time, the indoor air, which has been dehumidified and has a low temperature after passing through the evaporator 8, is reheated when it passes through the sub-condenser 1, and the I'! ! It comes back to normal and is blown out into the room.

However, with this method, the pressure reducer 2. 7 is 2 pieces, 2-way valve 3
.

OBJECTS OF THE INVENTION The present invention eliminates the above-mentioned conventional drawbacks and aims to simplify the structure of a frozen cycle.

Structure of the Invention In order to achieve this object, the present invention samples the room temperature TR at the start of operation, and calculates the compressor forced operation temperature [i] by Tc, which is set at 1 to 3°C from this room temperature TR. By setting the low temperature position as the initial OFF point, this first JIJJ OF
The initial ON point was set at a temperature position higher than point F by 7 YAR ΔT, and when the room temperature fell to the initial OFF point from the start of operation, cooling operation was performed with the maximum air volume of the indoor blower for 11 hours of operation. The next operation time t1 is determined and set based on t, the indoor blower is stopped at the same time as the compressor is stopped, and the same state is set for a certain stop time ts between 2.6 and 3.5 minutes. Only if the room temperature after this stop time has elapsed exceeds the initial ON point by 1, change the setting of the previously set operation time t1 to a value that is extended by a certain period of time [IJΔt, and then turn the indoor The cooling operation is restarted at the maximum airflow of the blower, and if the room temperature falls to the initial OFF point within the operating time t1, the compressor and indoor blower are simultaneously stopped and the next operating time t is reached.
2 is set as tl - Δt, and the chamber width remains at the initial OF even after 1+ elapses.
At that point, the compressor and indoor blower of the platform after point F are stopped, and the next operation time t2 is set as tz=t+, and for the next 9 operations of L1, if the room temperature falls to the OFF point within 10 minutes, At the same time, the compressor and indoor blower are stopped, and the next operating time +1 is set to OFF -Δt, so that the room temperature remains OFF even after heating.
In the above case, the compressor and indoor blower are stopped at that point, and the next operating time tn+1 is set as tn+-+ = tn.
Only when the room temperature is above the ON point after the stop is removed,
By repeating the operation of setting the value 1 determined in the previous operation to a value extended by Δt, the number of compressor operations N is 6.
When a predetermined number of times between ~1o is reached, the ON point is set to the initial O
From the N point to the initial room temperature TR, the initial OFF point is set again from the initial room temperature to a temperature lower than 1/Ncial ΔT, and the above-mentioned operation-stop 1-operation is repeated. be. , Description of Embodiments Hereinafter, embodiments of the present invention will be described with reference to FIGS. 3 to 7 of the accompanying drawings.

In a moment, the refrigerant circuit of the air conditioner 11 will be explained with reference to FIG. Components that are the same as those in FIG. 1 will be designated by the same reference numerals and their explanations will be omitted.1 In the figure, 9 indicates an outdoor blower and 10 indicates an indoor blower. This refrigerant circuit is a conventionally well-known cooling circuit.

Next, an example of temperature and humidity control according to the present invention will be explained with reference to FIGS. 4 to 6.

Figure 4 shows the changes in temperature and humidity when an air conditioner is installed in a general room of a general house and the temperature and humidity control described above in the conventional cooling operation is performed under the initial conditions of high temperature and humidity. . In the same figure, both the temperature and humidity decrease due to one continuous stop rotation up to point A, but how the temperature and humidity return during the subsequent stoppage is shown in Note 1. This shows the case where the indoor blower was operated while the compressor was stopped. The solid line indicates I: ]: The humidity return is 11 points higher than the temperature return, but the broken line indicates the case where the indoor blower also stops while the compressor is stopped, and the humidity returns? It will be later than the recovery of lu'h degree.

Therefore, as shown in the figure, the result of continuous operation stoppage of the compressor is that a large humidity difference appears from 19 various experimental results. I know it will get results.

FIG. 5 illustrates the state during temperature and humidity control of the present invention, particularly immediately after the start of operation.

First, the initial OFF point Trovy is set at a location lower than the room temperature TR by the compressor forced operation allowable temperature 1jTc in the range of 1 to 3℃.
Then, take the three-way differential ΔT of -'c and set this point as the initial ON, aTION. Tc=
The range of 1 to 3°C has been determined empirically, and under temperature conditions under which dehumidifying operation is normally performed, a temperature drop within this range will hardly cause any discomfort.

From room temperature TR to Troyp, the indoor blower is at its maximum."
;Perform cooling operation.

After that, when both the compressor and the indoor blower are stopped, the temperature returns quickly and the humidity returns slowly, as described above in FIG.

By the way, if we add 1;
o can be used as a load index. So next time driving from to 11
．． Set t1 for 5 minutes.

In the example shown in the figure, the next operation time is set as tl=o, rato. Next, the compressor stop time must be kept as short as possible in order to minimize the return of humidity, and should be 2.5 to 3.5 minutes, at which time the difference between the discharge and suction pressures is sufficiently small and the compressor can be restarted. stipulated in Solid line: If the room temperature is below Tl0N after time ts has elapsed, the next operation will be at the operation time t1 specified above; if it is above Txo* as shown by the broken line, the load is heavy and the next operation time is t1. The setting is changed to the above operation time t1 plus a certain period of time [IJΔt.

Next, referring to FIG. 5, temperature and humidity control after entering steady operation will be explained.

The set operating time t1iI as shown by the broken line! Y: Previously Tlo
When the FF point is reached, the operation is stopped and the load is light, so the next operation time t2 is determined as tl-Δt.

As shown by the solid line, if T10FF is still exceeded even after t1 has elapsed, the operation is stopped here and t2=t+ is set. After repeating the same operation, when the number of compressor operations reaches a predetermined number N (N is determined between 5 and 1o), the ON point is set to L equal to the initial TH, and the OFF point is set to the differential Δτ. Change the settings to the point taken downwards, and then operate as described above.
Repeat the operations at stop tl:.

j [For compressor operation after t1, the indoor blower is operated at the lowest speed to keep the sensible heat ratio low. As a result, the cooling capacity also decreases, but as a result, the operating time becomes longer, so if the integrated amount of sensible heat capacity does not change and the integrated amount of sensible heat capacity is constant, the amount of dehumidification increases.

In this embodiment, even if the room temperature is lower than the thermo set value and the compressor does not operate with the temperature/humidity control mechanism of the air conditioner that only performs normal cooling operation, the compressor will not operate until the room temperature drops to the TloFF point. In order to operate, the relative humidity is reduced by a perceptually acceptable degree reduction 1]. Moreover, during this time, the indoor blower operates at maximum wind speed, and the maximum cooling capacity of the air conditioner is demonstrated, and although the sensible heat generation is large, the absolute value of the dehumidification capacity is large, so the humidity is quickly reduced.

The subsequent operation control is to maintain the minimum stop time that allows the compressor to start, and also to stop the indoor fan during this time to prevent the re-evaporation of dew on the evaporator surface and its return to the room, thereby minimizing the increase in humidity. After pressing, the operating time is changed as needed according to the fluctuation of the load, and during operation during this period, the indoor blower is operated at the minimum airflow h;° to maximize the total amount of dehumidification.

By repeating this type of dehumidification 5 to 10 times, the rare moisture contained in the walls, floor, ceiling, etc. of the room will be removed by approximately iI#ls, and after that, even if the operating rate of the compressor is lowered, the humidity will not increase. Since the temperature decreases, the ON point and OFF point are returned to near the initial room temperature to eliminate the slight cold caused by the low temperature, and from then on, steady operation is continued to maintain humidity.

In addition, as shown in FIG. 7, a bypass circuit 3 is provided in the refrigerant circuit.
1 may be provided to have a variable capacity structure, and the capacity may be changed in conjunction with the control of the indoor blower to a low 18 ports 1.5''. Similar effects can be obtained by performing similar control.
In the figure, 32 is a three-way valve, 33 is a heating capillary tube,
34 is a two-way valve, 35d: 17 contractions 1 and 5 abilities 11 changes (
It is 21.

"Effects of the Invention" - As is clear from the examples described, the present invention has no difference in the refrigerant circuit compared to a conventional air conditioner that operates only for cooling operation, and thus the present invention is a dehumidifier with a conventional heat exchanger. It is much cheaper and has a simpler structure than an air conditioner with a built-in function.In addition, during low and humid times such as during the rainy season, an air conditioner that only operates as a cooling unit will not operate below the thermosetting setting. This has the great advantage that even if the system becomes too cold if forced to operate, the relative humidity can be sufficiently reduced by only reducing the temperature to an acceptable level immediately after the start of operation.

[Brief explanation of drawings]

11th 1 is a refrigerant circuit diagram of the 11th air conditioner showing a conventional example, Fig. 2 is an operation control diagram of the conventional cooling operation control method, and Fig. 3 is an embodiment of the present invention. FIG. 4 is a humidity change diagram due to conventional temperature and humidity control operation, FIGS. 15 is a refrigerant circuit diagram showing another embodiment of the present invention. Compressor, 6.
...Condenser, γ...Reducer, 8...
・・Evaporator, 9・・・・・Outdoor blower, 10・・・・
・Indoor blower. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure II Dan-kaku Figure 3 Figure 4 Figure 5 Figure B Hand-stitched Figure 6 Figure 7 □ 1 combination and -r umbrella transfer-1--1-;

Claims (1)

[Claims] The room temperature TR at the start of operation is sampled, and this room temperature TR
The initial 077 point is the temperature position lower than Tc within the allowable compressor forced operation temperature, which is determined to be 1 to 3℃ from 1 to 3℃.
The initial ON point is set at a temperature higher than the temperature point by the thermometer ΔT, and cooling operation is performed at the indoor blower's maximum air volume from the start of operation until the room temperature drops to the initial 077 point, and the operation time is turned off during this time. Based on this, set the next operation time t1, stop the compressor and the indoor blower, and continue the circular and lie for a fixed stop time ts, which is set between 2.5 and 3.5 minutes. , only when the room temperature after this stop time has passed has passed L times around the initial ON point, first change the setting to a value that extends the operating time t1 by a certain time width Δt, and then cool the room with the minimum air volume of the indoor blower. If the room temperature reaches the initial 077 point F within operating time t1, the compressor and indoor blower will be stopped at 3 o'clock and the next operating time t2 will be set to t.
Set l-Δt, the chamber remains OFF initially even after t1 has elapsed.
At that point, the compressor and indoor blower are stopped, and the next operation time t2 is set to t2 = t+. From then on, for the n-th operation, if the room temperature falls to the OFF point within 30 seconds, the compressor and indoor blower are stopped at the same time. , the indoor blower is stopped and the next operation time is tn+1.
If the room temperature remains above OFF even after the successful completion, the compression is stopped at that point (stop the pig room fan, set the next operating time tn++ to tn4-1-beats, and stop
Only when the room temperature is equal to or higher than the ON point when the after-heating period has elapsed, repeat the operation of setting tn-t-+ set in the previous operation to a value extended by Δt. When the number of times determined between is reached, the ON point is changed from the initial ON point to the initial room temperature TH, and the OFF point is changed to the initial 077.
A temperature/humidity control method for an air conditioner in which the temperature point is set to a temperature position lower than the initial room temperature by a thermodifferential ΔT, and the above-described start-stop operation is repeated.