JPS5830509B2 - thick and cold - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvements in compressor control devices used in compressors of air conditioners and the like.

Generally, an air conditioner has a compressor that uses a pole number switching motor that is configured to switch between two and four poles, and a compressor that has two cylinders, one of which is configured to stop. The compressor is equipped with a compressor that has a two-stage compression capacity including starting and stopping, or a compressor that has a higher compression capacity, and the compression capacity of this compressor is switched by a control device.

Conventionally, this control device sets the compression capacity of the compressor to high capacity at the start of operation, regardless of whether the air conditioner is in heating or cooling operation. The compressor's compression capacity was switched to a lower capacity with higher operating efficiency, thereby increasing the operating efficiency of the compressor.

However, with conventional control devices, even at the start of cooling operation, which has a load 30 to 40 times smaller than heating operation, the compressor's compression capacity is set to high capacity with low operating efficiency, so the compressor is not operated. This has the disadvantage that the efficiency decreases and the power consumption of the compressor increases.

Therefore, an object of the present invention is to provide a control device that can operate the compressor at a low capacity with high operating efficiency during cooling operation when the load is lower than that during heating operation.

As a configuration for this purpose, the present invention includes a compressor that performs high-capacity and low-capacity operation, a detector that detects room temperature, and a temperature controller that switches the operating state of the compressor based on the room temperature detected by the detector, A first movable contact and a second movable contact of the temperature regulator are connected to one end of the power supply via an operating switch, and a third fixed contact and a fourth fixed contact of the temperature regulator are respectively connected to a third fixed contact of the cooling/heating changeover switch. The second movable pole is connected to the pole and the fourth fixed pole, the second fixed pole is connected to the fourth fixed pole, and the third fixed pole and the fourth fixed pole are switched through the coil of the power relay. The first movable pole is connected to the other end of the power source via a four-way valve coil, and the fixed contact of the temperature regulator is connected to the other end of the power source via the coil of the pole number switching device. The movable pole and fixed pole of the power supply relay are connected in series to one end of the power supply that is the same as the power supply or different from the power supply, and the movable pole of the pole number switching device is connected to the other end, and the first fixed pole of the pole number switching device is connected in series. is connected to the other end of the power source via the four-pole winding of the compressor, and the second fixed pole of the pole number switching device is connected to the other end of the power source via the two-pole winding.

Hereinafter, the present invention will be explained with reference to FIGS. 1 to 3 showing one embodiment thereof.

In the figure, A is a power source, and a temperature regulator 2 is connected to the power source A via an operation switch 1.

This temperature regulator 2 has a first movable contact 2a, a second movable contact 2
b, a first fixed contact 2cs, a second fixed contact 2d, a third fixed contact 2e, and a fourth fixed contact 2f.

Reference numeral 3 denotes a detector for detecting room temperature. This detector 3 is connected to the temperature regulator 2, and the output of this detector 3 causes the first movable contact 2a and the second movable contact 2b of the temperature regulator 2 to move. It has become.

4 is a compressor for switching the number of poles, which is equipped with a 4-pole winding 4a and a 2-pole winding 4b; when the compressor 4 is operated at high capacity, the 2-pole winding 4b is operated, and vice versa. 4 when driving with
A pole winding 4a is used.

The first movable contact 2a of the seismic intensity controller 2 determines whether the temperature detected by the detector 3 is the cooling low capacity operating set temperature T1 of the compressor 4 during cooling operation and the heating low capacity operating set temperature T2 of the compressor during heating operation. If it is high, that is, during cooling operation, T > T, (1)
During heating operation T>T2・・・・・・・・・ [■
], the first fixed contact 2c is turned on.

Moreover, this first movable contact 2a is connected to the room temperature T detected by the detector 3.
However, if it is lower than the cooling high capacity operation setting temperature T3 of the compressor 4 during cooling operation and the heating high capacity operation setting temperature T4 of the compressor 4 during heating operation, that is, T<T3 during cooling operation.・・〔■〕
During heating operation, T<T4... (l'
TV), the second fixed contact 2d is turned on.

The second movable contact 2b of the temperature regulator 2 indicates that the room temperature T detected by the detector 3 is set to the cooling start temperature T5 of the compressor 4 during cooling operation. If it is higher than the heating stop set temperature T6 of the compressor 4 during heating operation, that is, during cooling operation, T>T
5・・・・・・・・・ [■] During heating operation T>T
6...... If the relationship [■] holds, the third fixed contact 2e is turned on.

In addition, this second movable contact 2b is connected to the room temperature T detected by the detector 3, and the cooling stop set temperature T7 of the compressor 4 during cooling operation.
, if the temperature is lower than the heating start temperature T3 during heating operation,
In other words, if the relationship T<T7...[■] is strong during cooling operation, and T<T8......[■] during heating operation, the fixed contact 2f It is set to turn on.

In addition, the above cooling set temperature TI, T3 + T5 +
T7 has a relationship as shown in the following equation (IX).

T5〉T1〉T7〉T8 ・・・・・・・・・(
■) Also, the above heating set temperature T2 y T4 + T6
, TB have a relationship as shown in the following equation (X).

T6〉T2〉T3〉T4 ・・・・・・・・・(
X) 5 is a cooling/heating changeover switch, which has a first fixed pole 5a, a second fixed pole 5b, a third fixed pole 5c, a fourth fixed pole 5d, a double-pole double-throw first movable pole 5A, and a second movable pole. During cooling operation, the first movable pole 5A, the second movable pole
The movable pole 5A' is turned on to the first fixed pole 5a and the third fixed pole 5c, and during heating operation, the first movable pole 5A and the second movable pole 5A are turned on to the second fixed pole 5b and the fourth fixed pole 5d, respectively. .

6 is a pole number switching device, and this pole number switching device 6 has a coil 6a electrically connected to the second fixed contact 2d of the temperature controller 2, and a first fixed pole electrically connected to the four-pole winding 4a of the compressor 4. 6b, a second fixed pole 6c electrically connected to the bipolar winding 4b, and a coil 6a.
and a movable rod 6d which is attracted by the movable rod 6d and switches from the first fixed pole 6b to the second fixed pole 6c.

A four-way valve coil 7 is electrically connected to the movable rod 5A of the cooling/heating changeover switch 5, and when current flows through the coil 7, the refrigerant circuit (not shown) is switched from the cooling cycle to the heat pump cycle.

Reference numeral 8 denotes a power supply relay, and this power supply relay 8 has a coil 8a electrically connected to the movable rod 5A' of the cooling/heating changeover switch 5, a fixed pole 8b electrically connected to the movable rod 6d of the pole number switching device 6, and a coil 8a that is attracted to the coil 8a. and a movable rod 8c that is turned on to the fixed pole 8b.

B is a power source for the compressor 4. Next, the circuit operation of the control device configured as described above will be explained.

First, heating operation will be explained using FIGS. 1 and 2.

In this case, first, the first moving pole 5A of the cooling/heating changeover switch 5,
The second movable pole 5A' is switched to the second fixed pole 5b and the fourth fixed pole 5d, and the operation switch 1 is first turned on.

In the initial state when the operation switch 1 is turned on, the room temperature T detected by the detector 3 is lower than the heating high capacity operation set temperature T4 of the compressor 4.

Therefore, the first movable contact 2a of the temperature regulator 2 turns on the second fixed contact 2d, and the second movable contact 2b turns on the fourth fixed contact 2f.

The first movable contact 2a is the second fixed contact 2d, and the second movable contact 2
When b is turned on to the fourth fixed contact 2f, first, current flows to the four-way valve coil 7, the refrigerant circuit switches to the heat pump cycle, and then the coil 6 of the pole number changeover switch 6
A current flows to switch the movable rod 6d to the second fixed pole 6cG, and a current also flows to the coil 8a of the power relay 8, turning the movable rod 8c on to the fixed pole 8b.

Therefore, the power source B is applied to the compressor 4, and as shown in FIG. 2, the high capacity operation period H of the bipolar winding 4b begins, and the room is heated.

Then, when the room temperature T rises and exceeds the heating low capacity operation set temperature T2, the detector 3 detects the room temperature T, and the first movable contact 2a of the temperature regulator 2 changes from the second fixed contact 2d to the first Switched to fixed contact 2c.

Then, no current flows through the coil 6a of the pole number switching device 6, and the movable rod 6d separates from the second fixed pole 6c and returns to the first fixed pole 6b, thereby causing the compressor 4 to operate as shown in FIG. During the low-capacity operation period of the four-pole winding 4a, which has high operating efficiency, the switching is performed.

Furthermore, the room temperature T rises, and the room temperature T becomes the heating stop setting temperature T.
6, the detector 3 detects the room temperature T, and the second movable contact 2b of the temperature regulator 2 changes to the fourth fixed contact 2.
f to the third fixed contact 2e.

Then, current no longer flows through the coil 8a of the power relay 8, and the movable rod 8c separates from the fixed pole 8b. As a result, the power supply B is no longer supplied to the compressor 4, and the operation is stopped for a period S as shown in FIG. enter.

When the compressor 4 enters the operation stop period S, the room temperature T decreases, and when the room temperature T reaches the heating start set temperature T8, the second movable contact 2b of the temperature regulator 2 changes from the third fixed contact 2e to the fourth fixed contact. 2f, the movable rod 8c of the power source J-ray 8 is turned on to the fixed pole 8b again, and the compressor 8 starts operating again.

In this case, since the room temperature T is higher than the heating high-capacity operation setting temperature T4, the compressor 8 performs low-capacity operation, and the room temperature T rises as shown by the dashed line in FIG.

However, if the room temperature is very low and the compressor 8 is operating at low capacity, and the room temperature T cannot be raised, as shown by the solid line in Figure 2, the room temperature T is set at the heating high capacity operation setting temperature T4. When the room temperature T falls to this temperature T4, the compressor 8 again performs high capacity operation, enters a high capacity operation period H, and heats the room.

Next, the cooling operation will be explained using FIGS. 1 and 3.

In this case, first move the movable rod 5A of the cooling/heating switch 5 to the
The fixed pole 5a and the movable rod 5A' are switched to the third fixed pole 5cF, and then the operation switch 1 is turned on.

In the initial state when the operation switch 1 is turned on, the room temperature T detected by the detector 3 is higher than the cooling low capacity operation set temperature T1 of the compressor 4.

Therefore, the first movable contact 2a of the temperature regulator 2 is connected to the first fixed contact 2c, and the second movable contact 2b is connected to the third fixed contact 2e.

In this way, when the first movable contact 2a is connected to the first fixed contact 2c and the second movable contact 2b is connected to the third fixed contact 2e, no current flows through the four-way valve coil 7, so the refrigerant circuit goes into the cooling cycle. In addition, since a current flows through the coil 8a of the power supply relay 8, the movable pole 8c is connected to the fixed pole 8b, and the compressor 4 receives power B and starts cooling operation.

In this case, since no current flows through the coil 6a of the pole number switching device 6, the movable pole 6d of this device 6 is connected to the fixed pole 6b, and the compressor 4 is operated during the low capacity operation period as shown in FIG. The room is cooled at low capacity.

Thereafter, when the room is cooled and the room temperature T reaches the cooling stop setting temperature T7 of the compressor 11, the second movable contact 2b of the temperature regulator 2 switches from the third fixed contact 2e to the fourth fixed contact 2f; As a result, current no longer flows through the coil 8a of the power supply relay 8, and the compressor 4 enters a shutdown period St as shown in FIG.

When the compressor 4 stops operating, the room temperature T rises, and when the room temperature T reaches the cooling start temperature T of the compressor 4, the second movable contact 2b of the temperature regulator 2 returns to the third fixed contact 2e.
As a result, current flows through the coil 8a of the power supply relay 8, and the compressor 4 enters the low capacity operation period again.

In this way, the compressor 4 is not operated at high capacity during cooling operation.

This means that the load is 3 times lower during cooling operation than during heating operation.
This is because the efficiency is higher when the number is 0 to 40 times smaller and the compressor 4 is operated at a lower capacity.

As described above, according to the present invention, the compressor can be operated at a low capacity with high operating efficiency during the cooling operation where the load is 30 to 40φ smaller than during the heating operation, and this makes it possible to operate the compressor at a low capacity with high operating efficiency. The performance is significantly improved, and power consumption can be significantly reduced.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram of a compressor control device according to an embodiment of the present invention, FIG. 2 is a diagram showing an example of the operating state of a compressor controlled by the device during heating, and FIG. 3 is a diagram of the same device. FIG. 3 is a diagram showing an example of the operating state of the compressor during cooling, which is controlled by the compressor. 1... Operation switch, 2... Temperature controller, 2a... First movable contact, 2b...
Second movable contact, 2c...First fixed contact, 2d.
...Second fixed contact, 2e...Third fixed contact, 2f...Fourth fixed contact, 3...Detector, 4...・Compressor, 4a...4-pole winding, 4b...2-pole winding, 5...cooling/heating changeover switch, 5A...1st movable pole , 5A...
...Second movable pole, 5a...First fixed pole, 5b
...Second fixed pole, 5c...Third fixed pole, 5d...Fourth fixed pole, 6...Pole number switching device, 6a... ... Coil, 7... Four-way valve coil, 8a... Coil.

Claims (1)

[Claims] 1. A compressor that operates at high capacity and low capacity, a detector that detects room temperature, and the room temperature detected by this detector activates the first and second movable contacts, and when the temperature is high, the first fixed contact and The third fixed contact is closed and at medium temperature,
A temperature regulator that closes the first fixed contact and the fourth fixed contact and closes the second fixed contact and the fourth fixed contact when the temperature is low, and the first movable pole and the second movable pole, respectively, during cooling, A cooling/heating changeover switch is provided that closes the first fixed pole and the third fixed pole, and closes the second fixed pole and the fourth fixed contact during heating. Connect the first movable contact and the second movable contact, connect the third fixed contact and fourth fixed contact of the temperature controller to the third fixed pole and fourth fixed pole of the cooling/heating changeover switch, respectively, and The second movable pole that switches between the third fixed pole and the fourth fixed pole is connected to the other end of the power supply via the coil of the power supply relay, and the first movable pole is connected to the fourth fixed pole. A pole is connected to the other end of the power source via a four-way valve coil, and a second fixed contact of the temperature regulator is connected to the other end of the power source via a coil of a pole number switching device. Connect one end of another power supply, the movable pole and fixed pole of the power supply relay, and the movable pole of the pole number switching device in series, and connect the first fixed pole of the pole number switching device to the 4-pole winding of the compressor. A compressor control device connected to the other end of the power source, and a second fixed pole of a pole number switching device connected to the other end of the power source via a two-pole winding.