JPS60133250A - Air conditioner - Google Patents

Abstract

PURPOSE:To reduce the quantity of air flowing into a room in defrosting to thereby eliminate uncomfortableness, by a construction wherein a plurality of blowers are provided, and an appropriate number of blower motors are so connected that they can be selectively connected in a Y-connection or a DELTA-connection. CONSTITUTION:In the figure, two room heat exchanger blowers and motors for the blowers are provided. The blowers are connected in the DELTA-connection when electromagnetic contactors 52F1, 52F2 are turned ON and an electromagnetic contactor 52F3 is turned OFF, and the blowers are connected in the Y-connection when the contactors 52F1, 52F3 are turned ON and the contactor 52F2 is turned OFF. When an exterior heat exchanger is frosted and a temperature switch 26D is turned ON, a b-contact x1 for a relay coil (x) is turned OFF, a four-way valve coil 21S4 is turned OFF, a c-contact x2 for the relay coil (x) is switched to the right side, the contactor 52F2 is turned OFF, the contactor 52F3 is turned ON, and an electromagnetic contactor 52F4 is turned OFF, so that a No.1 blower is rotated through the Y-connection, while a No.2 blower is stopped.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] This invention relates to an air phase conditioner that is fully equipped with a cold air prevention device by defrosting during heating. [Prior Art] Fig. 1 shows a conventional X embodiment. This is an electrical wiring diagram shown in gold. In the same figure, (52F) is the electromagnetic contactor of the fi indoor heat exchanger blower, (520) is the electromagnetic contactor of the rice compaction machine, and (1B4)
fl four-way valve coil, tX) fd relay coil, (2
6D) is the temperature switch for defrost, (28WA) is the temperature regulator for indoor temperature, (SWI) is the heating switch,
(SW2) is a cooling switch.

To explain the operation, the heating switch (SWI) '(il)
When it is turned on, the electromagnetic connection for the blower and the 1i11 unit (52F) are turned on, and the fiber feeder and compressor rotate. Furthermore, a temperature switch (26
D) is off, the relay coil LXI is off, and the relay coil (Kl's b contact (x+), which is connected in series with the four-way valve coil (1 day 4), is on, and the four-way valve coil (
When 2xs+3 is turned on, heating operation begins.During that time, as the outside temperature drops, the fins of the outdoor heat exchanger begin to grow frost.

Then, the temperature of the fin part starts to drop and when it reaches the set temperature of the temperature switch (26D) attached to the fin part, A
K switch (26D) is on, relay coil fX)
is on, its b contact (xl) is off, and the four-way valve coil (2
184) is turned off, a four-way valve (not shown) is turned off on the refrigerant circuit side, and the circuit is switched to the defrost circuit. During this time, the blower (not shown) continues to rotate due to the electromagnetic contactor (52F), and cold air is blown into the room, causing discomfort. During defrosting, high-temperature discharge gas flows through the outdoor heat exchanger, melting the ura, and the temperature of the fin begins to rise, turning off the temperature switch (26D).
X) is off, its b contact c When it is low, this cycle is repeated. Also, during defrosting, if you turn off the magnetic contactor (52F) and turn off the JR machine (not shown) to prevent cold air, the suction capacity from the room will be reduced, and the defrost capacity will be reduced. This had the disadvantage that the defrost time was longer.

[Summary of the invention]

This invention was made to improve this drawback, and is designed to reduce the amount of air blown into the room during the defrosting period, thereby eliminating the discomfort 'ff:.

[Embodiments of the invention]

FIG. 2 is a control circuit diagram showing one embodiment of the present invention.

FIG. 8 shows a part of the main circuit.

As shown in the figure, a magnetic motor is used as a blower for two indoor heat exchangers (52Fl) (52F2) (
52FB) is an electromagnetic contactor for the blower motor, as shown in Figure 8, and is connected in a delta connection and large connection as shown in Figure 8.
is on and the electromagnetic contactor (52F2) is off, it will be a large connection (low torque). Note that (MFJ is the 4-movement 1 [coil], (58F4) is the 'magnetic contactor of the blower motor of 52). It is.

In such a circuit, when the 1 support switch (SWI) k is turned on, the temperature switch (26D) is turned off and the relay coil tXl is turned off.
b contact (x,) is on, four-way valve coil (21E+4
) is turned on and the refrigerant circuit becomes a heating circuit. , the electromagnetic contactor (52Fη on), and the relay coil tXl
Since the C contact (X,) is on the left side in the figure, the '4 magnetic contactor (52F2) is on, the magnetic contactor (52F3) is off, and the C1 blower rotates due to the Δ connection. Furthermore, when the Shima magnetic contactor M (52FiS) is turned on, the two main blowers also rotate at the same time. When the outdoor heat exchanger becomes frosted and the temperature switch (26D) is turned on, the b contact (x1) of the relay coil (X) is turned off, the four-way valve coil (81s4) is turned off, and the relay coil (Xi's O
Point f (Xρ switches to the right in the figure, the magnetic contactor (51SFf) is off, the magnetic contactor (52FJl) is on, the magnetic contactor (52F4) is off, and the fan and l blower rotate with a large connection. , the second blower stops.At this time, the blower M
The amount of A is proportional to the number of rotations of the blower.

The rotation speed ratio of the , me, and l blowers when connected in a delta connection and in a large connection is approximately 1.
00: 'In, so the ratio of air flow during normal operation and during defrost is [100+100) near 0ζ8:
1, and the air flow rate decreases to %. Therefore, there is almost no possibility that the cold air blown toward the indoor side will cause discomfort. Also, since the defrosting capacity is exchanging heat indoors, the rate of decrease is small and it does not take a long time.

〔Effect of the invention〕

As explained above, this invention connects an appropriate number of blower motors among a plurality of blowers so that they can be switched to large connection or delta connection, and switches to large connection at the time of defrosting, making it possible to prevent cold air blowing. It has the effect of creating a comfortable full tone.

[Brief explanation of the drawing]

FIG. 1 is a conventional electrical circuit diagram, FIGS. 2 and 3 show an embodiment of the present invention, FIG. 2 is a control circuit diagram, and FIG. 8 is a royal circuit diagram. In the figure, (52F), (li2Fl), (
52F2), (52F8). (52F4) is an electromagnetic contactor for the blower, (520) is an electromagnetic contactor for the compressor, (GLS4) is a four-way valve coil, X is a relay coil, (26Il is a temperature switch, (28WA)
is once the regulator, (SWI) is the heating switch, (SW2)
is the air conditioner switch. In the drawings, the same reference numerals indicate the same or ri-equivalent metals. Figure 1 Figure 2 SW+ Figure 3 2F2

Claims (1)

[Claims] In the case where the plurality of blowers for the indoor heat exchanger are configured to stop the above-mentioned blowers during defrosting of the outdoor heat exchanger, an appropriate number of the above-mentioned blowers can be switched to large connection or delta connection. An air conditioner characterized in that the above-mentioned method J@MA is switched to a large connection when the outdoor heat exchanger is defrosted.