JPS59185931A - Air conditioner - Google Patents

Abstract

PURPOSE:To shorten the warming up time after a start-up and to make a temperature fluctuation range small during the air conditioner operation by quickly adjusting the compressor output in response to the existing load. CONSTITUTION:The present air conditioner has a compressor 1 consisting of two compressors 1A, 1B which are adjustable in their capacity in stages by the operation of a capacity controller 2. For instance, when a six cylinder reciprocating compressor is used, the low pressure induction gas passage in the compressor casing may be divided into two to allow a separate induction by each group of three cylinders so that a selection of 100% or 50% capacity operation may be done by opening or closing an induction passage to one group of three cylinders. At the time of start-up, a switch means is operated to cause the compressor 1 to start at an intermediate capacity of 50%+50%, and at the same time the sampling frequency for temperature comparison by a thermo 4 is shortened from three minutes to one minute. As the comparison of the induction air temperature and the set temperature is made by a repetition of short cycles, a step control to move up by one stage can be quickly done while the capacity increasing signal is being outputted.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an air conditioner that enables temperature control with a small fluctuation range by operating a compressor without performing capacity control by comparing the temperature with a set temperature.

Many devices are used that periodically detect the temperature of the blown air, control the capacity of the compressor, and perform air conditioning to maintain a constant temperature.
- As in the device disclosed in Publication No. 10492, the capacity controller is deactivated until the air temperature reaches the predetermined thermostat setting after startup, so that the operation can be stopped. Usually, the control circuit is configured to shorten the rise time at startup.

For example, if you are using a compressor that is capable of staged capacity control with a large number of steps (usually 5 to 9 stages), when you start it up in a low capacity range, the capacity will be controlled in one cycle in one step. This is because it takes a long time to reach the capacity range commensurate with the load, and it becomes impossible to quickly reach the desired temperature range, which has the disadvantage of causing discomfort.

Therefore, at startup, it operates at 100% capacity, and from the point when the blown air temperature reaches a predetermined temperature, it operates normally periodically.

This is a step-by-step capacity control.

However, with this, when the air conditioning load is small and the air conditioner is started at 100% capacity, the humidity exceeds the predetermined humidity setting. @
In the case of a room, it becomes too cold, and in the case of only one heating, it becomes too hot, and the predetermined set temperature is reached slowly through subsequent step capacity control.

In this way, with conventional equipment, it takes a long time, especially when starting up.
The present invention has been developed with a focus on the above, and its purpose is to shorten the warm-up time during starting operation and to quickly reach the compression function commensurate with one load. By performing air conditioning operation with small humidity fluctuations, a comfortable environment is ensured) +I
1. The point is that it is easy to obtain.

To this end, the present invention provides a compressor capable of controlling the capacity, a capacity controller capable of controlling the capacity of the compressor stepwise, a temperature detecting means for detecting the air temperature in an air-conditioned area, and the temperature detecting means. A capacity control command that periodically and repeatedly compares the detected temperature with a set temperature that has a temperature band, and selects and issues the corresponding one of a capacity increase signal, a capacity decrease signal, and a current capacity maintenance signal. and if the signal issued by the capacity control command means is a capacity increase signal or a capacity decrease signal, a step control output of one step increase or one step decrease is given to the capacity controller, while a current capacity maintenance signal is issued. If so, the capacity control output means maintains the capacity controller in the current controlled output state, and the capacity control output means operates the capacity controller at an intermediate capacity between the maximum capacity and the minimum capacity in conjunction with starting operation of the compressor. D) activate the signal and issue a signal to the capacity control command means to shorten the cycle for temperature comparison; and D) continue the signal until the point where the current capacity maintenance signal is issued, and then release the signal. The air conditioner is equipped with a switching means (61) for restoring the cycle.
)7)・It is possible to reach the capacity commensurate with the load quickly (without overturning), and it is also possible to eliminate the overrun phenomenon ff: exceeding the set temperature range, thus achieving the above purpose. The monkey is the one who does it.

Hereinafter, an embodiment of the air JM summation device of the present invention will be described in detail based on drawing VC.

The air delta damping device according to the embodiment of the present invention shown in FIG. For example, by using a 6-cylinder reciprocating compressor, the low-pressure intake gas passage in the compressor casing is divided into two, so that three cylinders can each take in suction. The passage can be opened and closed to enable 100% and 50% operation.

When these two compressors (IA) and (IE) are combined and operated at 100% operation of the capacity controller + 21, the maximum (first stage) capacity is achieved, one being 100%.

Capacity of the second stage with the other operating at 50% 1 Both 50%
The ability of the 3rd stage to operate at 100% on one side, the ability of the 4th stage to operate at 100% on one side, the 5th stage ability to operate on only one side at 50%, and the ability to fully stop is added to the 6th stage of MIV. Capacity control is possible.

Therefore, in the cooling operation of this device, the gas discharged from the compressor [+1w] is condensed and liquefied in a condenser (not shown), and then reduced in pressure with a pressure reducer to form a low-pressure refrigerant liquid.
1, the heat of vaporization is exchanged with indoor return air, and then returned to the compressor (1);
It is configured to have two independent refrigerant circuits.

Then, the evaporator (7) cools T1. The indoor return air is sent indoors through the air supply duct (91) by the indoor fan (8).

Is that so? ! ? In the i room operation, the temperature of the air in the area to be cooled (for example, the air supply temperature)
Rf3B: Temperature control to keep the temperature constant based on the signal from the temperature sensor is performed under the capacity control of the compressor mentioned above.

To explain this 1lrlJ simple 1 system with reference to Figs. 1 to 3, the i]'' humidity sensor (31 is used as a human power signal input, and the /l' capacity controller (2) is used as an output element. Ability! 1i14 command 10th stage (4) For example, 3rd stage finger <?-shaped blade - Mostara I and - equipped with a control circuit (lOj).

3PiN thermostat (hereinafter abbreviated as T1-Mo)
For t=l+, as shown in Fig. 3, the set temperature points differ by several degrees, and the temperature W,'] node (4A), (4B) each has a differential of about 1°C for each υ. When the high temperature side 1 (4A) and the low temperature side 1 (4B) both move by 1 to form the contact a', this -1 is taken as the capacity boost n signal, while the High humidity 111! l(
When the low temperature side (4B) is activated and closes the contact (ON), the current capacity is maintained. Signal output, high humidity l1111 (4, A ) + low temperature side 1 (413
If the contact is turned off (OFF) with both of them inactive, this is a signal to reduce the capacity.
One of the three numbers A, -C, etc., such as L, is selected depending on the level of air temperature in the area to be air conditioned (in the case of this example, the temperature of the outlet air), and the periodicity is determined by combining it with a timer circuit. Target (
It used to be issued repeatedly over a period of 3 minutes (usually 3 minutes).

Thermo+41, which performs the above-mentioned operation, is of course used for cooling, and for heating, a capacity increase signal and a capacity decrease signal are input.
Needless to say, it's best to change things by one.

Next, the control circuit (10j is shown as a block in FIG. 2, consisting of capacity control output means (51 and switching means (6)) 89 to capacity control output means (5) is connected to the Capacity controller (2
If the signal from the thermometer (4) is a capacity increase signal or a capacity decrease signal, the step control output increases or decreases by one level. is issued to the capacity controller (2), while the current capacity maintenance signal 1''1. issues an output to maintain the capacity controller (2) in its current control output state.

The switching means (6) receives a command signal (S) from the compressor (1) to start operation, for example, when a temperature control switch is closed, and generates a command signal (S) for starting the operation of the compressor (1).
1 to the highest capacity (Zoo%+100%) and lowest capacity (0%
100%) at an intermediate capacity (for example, 50% + 50%), and sends a signal to the timer circuit of the thermometer (4) to set the temperature comparison cycle. 9'', for example, the normal period of 3 minutes (the period of 1 minute of 'ro l (T
1).

This shortening signal is continued from the start of operation until the signal from the thermostat 141 switches from the capacity increase signal to the current capacity maintenance signal, and then is divided by vcys. The thermometer +41 is operated at the normal cycle ('
This will restore it to work with rol.

The cycle can be shortened in this way simply by changing the discharge time constant for timing in an electronic timer circuit comprising a capacitor and a resistor.

The cooling operation of an air conditioner having the following structure is as follows.

Due to the closing of the temperature control switch (see Figure 4),
The compressor (1) starts, but at that time, as mentioned above, the switching means 16+ operates and the compressor (1) changes to (50% + 50%).
), the Thermo+41 is simultaneously forced to shorten the sample period for temperature comparison from 3 minutes to 1 minute.

Therefore, as shown in Fig. 5, the suction air temperature is compared with the set temperature by nine repetitions of a short TI = 1 minute, and as a result, while the capacity increase signal is issued, the Increased step control is performed quickly.

In that case, when the cooling load is large, the maximum capacity is naturally reached (quickly), while when the cooling load is small, the temperature reaches the set temperature quickly, so the capacity increase signal switches to the current capacity maintenance signal by the time the cooling load reaches the maximum capacity. .

In this way, at the same time as the signal issued by the thermometer (41) switches to the current capacity maintenance signal (c), the thermometer +41 restores the sampling period from 1 minute force to 3 minutes (=J, and then 3 minutes). By comparing the temperature every minute, the compressor capacity is controlled according to the type of signal issued by the thermometer (4), and the capacity suitable for the load is selected (speed or power), reducing the number of starts and stops. - Cooling operation with stable temperature is performed.

Furthermore, since the compressor is started at an intermediate capacity, sudden suction of refrigerant does not occur, and therefore, problems such as damage to the compressor due to liquid bag do not occur.

Incidentally, although the above-mentioned embodiment has been described with respect to cooling operation, the present invention also has a similar configuration for temperature control in heating operation.

It goes without saying that this can be achieved by action and can be applied to heat pump type air-conditioning devices and the like.

Next, the effects of the present invention are as follows.

(I) Since the engine is operated at an intermediate capacity instead of the maximum capacity at the time of starting, it is possible to eliminate the overrun phenomenon that tends to occur when operating at an excessive capacity.

(1) When the load is large, the engine capacity is increased in the stirrup cycle from the intermediate capacity after starting, so the maximum capacity operation is quickly reached and the warm-up time is shortened.

(Button) By shortening the sampling period at startup, the system quickly reaches a capacity commensurate with the load, resulting in extremely high comfort.

■ After the rapid capacity control after startup is completed, the sampling period is returned to normal, so
There is no need for short-term repetitions of starting/stopping the compressor and changing the capacity, which improves operating economy and reliability.

[v] Since the engine is started at intermediate capacity, liquid back-up is prevented.

[Brief explanation of the drawing]

Each figure shows an aspect of an embodiment of the present invention, and FIG. 1 is a schematic structural diagram, FIG. 2 is a control circuit block diagram, and FIG. 3 is an explanatory diagram of the operation of the capacity control command means in FIG. 2. , FIG. 4 is a flowchart relating to the switching means of the control circuit shown in FIG. 2, and FIG. 5 is an operation explanatory diagram showing changes in the temperature of the blown air with respect to operating time. ill...compressor, (2)...capacity controller (3)...
...Temperature detection means, (4j... Capacity control command means. (51... Capacity control output means, (6)... Switching means.

Claims (1)

[Claims] / A capacity controllable compressor (1), a capacity controller (f2'l) that can control the capacity of the compressor (1) in stages, and a temperature detection means (3) that detects the air temperature in an air-conditioned area. , the temperature detected by this temperature detection means (3) is periodically compared with a set temperature having a temperature range, and a capacity increase signal,
If the capacity control command means +41 selects and issues the corresponding one of the capacity reduction signal and the current capacity maintenance signal, and the signal issued by this capacity control command means (4) is a capacity increase signal or a capacity decrease signal. , the capacity controller +21 V
One step more for C, 7J! ] or the capacity control output means (51) which maintains the capacity controller (21) in the current control output state with the current capacity maintenance signal and the compressor (1) while giving a step control output of one step decrease. In conjunction with the start of operation, the capacity controller (21) is operated at an intermediate capacity between the maximum capacity and the minimum capacity, and the cycle for temperature comparison is shortened for the capacity control command means +41. An air conditioner characterized by comprising a switching means (61) for issuing a signal and continuing the signal until switching to issuing a current capacity maintenance signal, and then canceling the signal and restoring the cycle. .