JPS6045333B2 - air conditioner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an air conditioner equipped with a variable capacity compressor.

BACKGROUND ART Conventionally, some air conditioners using a variable capacity compressor change the capacity depending on the load.

However, in this case, if the room temperature suddenly rises at night, etc., the variable capacity compressor may be operated at a large capacity for a short period of time, causing noise. In addition, in the case of manually selecting the compressor capacity, the operation is cumbersome.
There was a risk that the compressor would always be fixed at a large capacity, and the energy savings that could be realized when operating the compressor at a small capacity were not realized.
The present invention solves the above-mentioned drawbacks, and aims to extend the energy-saving operation time to a greater or lesser extent according to the will of the user, even if the air conditioning capacity is sacrificed to some extent. An embodiment of the present invention will be described below with reference to the accompanying drawings.

In Figure 1, 1 is a variable pole number compressor as a variable capacity compressor, 2 is a condenser as a heat exchanger on the heat source side, 3 is a pressure reduction device, and 4 is an evaporator as a heat exchanger on the user side. constitutes a refrigeration cycle. In FIG. 2, 5 is a power supply, and an operation switch 6, a room temperature controller 7, and a pole number changeover switch 8, which is a capacity conversion switch serving as a capacity variable means, are connected in series to the motor 9 of the variable pole number compressor 1. has been done. Reference numeral 10 denotes a timer device, which is always energized by the power source 5.

Reference numeral 11 denotes a relay coil whose energization is regulated by a timer device 10, and this relay coil 11 is connected to a switch 13 as a capacity fixing means for short-circuiting the four-pole side terminal 12 of the motor 9, and when this switch 13 is closed. It opens and closes the switch 14 which turns off the power to the pole number changeover switch 8 at times. The relay coil 11 and the switch 14 constitute a switching means, and the switching means operates the capacity fixing means for a predetermined time set by the timer device. Further, a switch 15 that is closed at the same time as the operation switch 6 is connected in series with the relay coil 11. Note that the blower circuits for the condenser 2 and evaporator 4 are omitted.
With the above configuration, the operation of the present invention will now be explained. First, since the timer device 10 is always energized, it functions as a so-called electric hour, and if this timer device 10 is used in the main body of the air conditioner, it can also be used as a clock. Therefore,
By setting the timer device 10 to a time period when the cooling load is considered to be relatively small (for example, between 6 p.m. and 7 a.m.), the relay coil 11 and timer device 10 are automatically turned off during this time period. The sides are connected. When the operation switch 6 is turned on during the above time period and the room temperature controller 7 is closed, the switch 15 is also closed, so the relay coil 11 is energized, the switch 13 is closed, and the switch 1
4 is released. Therefore, regardless of the number of poles of the pole number changeover switch 8, the motor 9 always rotates at a low speed with four poles, and the variable pole number compressor 1 is operated at a low capacity. As a result, the amount of refrigerant discharged is small compared to the capacity of the evaporator, so the refrigeration effect can be increased, cooling can be performed with high efficiency, and energy-saving operation can be achieved. Further, when the motor is operated outside the above-mentioned time period, the number of poles is automatically changed by the pole number changeover switch 8. As described above, in this embodiment, four-pole operation is always performed during hours when the cooling load is relatively low, depending on the user's will.
Noise prevention at night and savings in operating costs are achieved.

In this embodiment, the timer device 10 is operated by the operation switch 6.
However, the present invention is not limited to this, and a switch for turning off the power may be provided inside the timer device 10, or the power may be supplied from the downstream side of the operation 5 switch 6.

In this way, the timer device will operate only when necessary.
The number of poles can be fixed for a desired number of hours. Also,
Some sleep timers are used to stop the operation using a so-called sleep timer 5, but according to the present invention, the sleep timer clock device may be used in common with a timer device for setting the number of poles. Alternatively, the pole number fixing time may be set independently of the operation stop time.

In addition, in this example, the air conditioner was used exclusively for cooling, but
A heat pump type may also be used.

Also, during the time set by the timer device, the capacitance is fixed at a small capacity of 4 poles, but it may also be fixed at a large capacity of 2 poles. In this case, during the set time, the number of poles changes. This helps extend the life of the pole number switching device.

Furthermore, a multi-room air-conditioning/heating machine with a plurality of user-side heat exchangers may be used. In this case, frequent switching of the number of poles at night etc. can be avoided and noise can be prevented.

Further, the variable pole number compressor is not necessarily a variable capacity compressor, such as an unloader type or a continuously variable rotation speed type.

As described above, according to the present invention, a refrigeration cycle is configured by connecting a variable capacity compressor, a heat exchanger on the heat source side, a pressure reduction device, a heat exchanger on the user side, etc., and only the capacity of the variable capacity compressor is connected. Since it is equipped with an independent timer device that fixes only the set time, energy-saving operation is possible according to the user's free will, and it is an excellent product that helps extend the life of the device without frequent operation of the variable capacity device. It is effective.

[Brief explanation of the drawing]

FIG. 1 is a cooling cycle diagram of an air conditioner according to an embodiment of the present invention, and FIG. 2 is a control circuit diagram thereof. 1... variable capacity compressor, 2... condenser, 3... evaporator, 4... pressure reducing device, 5...
...Power supply, 6...Operation switch, 8...
... Pole number changeover switch (capacity conversion switch as capacity variable means), 10... Timer device, 11.
...Relay coil (switching means), 13...
Switch (capacity fixing means), 14... switch (switching means).

Claims (1)

[Claims] 1 Configure a refrigeration cycle by connecting a variable capacity compressor, a heat source side heat exchanger, a pressure reduction device, and a user side heat exchanger, and
An operation switch connected in series to a power source, a capacity variable means such as a capacity conversion switch for the variable capacity compressor, a capacity fixing means such as a switch that fixes the capacity of the variable capacity compressor to a specific capacity, and a setting time. An air conditioner comprising: a timer device that can arbitrarily set a variable value; and a switching device that operates the capacity fixing device for a predetermined period of time set by the timer device.