JPS5912271A - Air conditioner - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an air conditioner that can perform cooling or heating by changing the refrigerant circuit by switching a solenoid valve. It is something to do.

The refrigerant circuit diagram of a conventional air conditioner is shown in FIG.
Capillary 5.6. and a check valve 7.8,
During cooling, the electromagnetic coil (not shown) of the electromagnetic four-way valve 2 is not energized, and the refrigerant flows in the 1-2-3-5-8-4-
The heat flows in the order of 2-1, radiates heat in the outdoor heat exchanger 3, and absorbs heat in the indoor heat exchanger 4, thereby cooling the room. Next, during heating, by energizing the electromagnetic coil of the electromagnetic four-way valve 2, the electromagnetic four-way valve 2 switches as shown by the dotted line, and the refrigerant changes to 1-2-4.
-6-7-3-2-1, heat is radiated by the indoor heat exchanger 4, and heat is absorbed by the outdoor heat exchanger 3, thereby heating the room.

In the conventional air conditioner as described above, switching between high-temperature discharge gas and low-temperature suction gas of the compressor 1 is performed within the main body of the electromagnetic four-way valve 2, and high-temperature gas and low-temperature gas constantly flow within the same main body. Therefore, heat exchange between the high-temperature gas and the low-temperature gas occurs through the main body or the valve body, which has the disadvantage that the heating capacity is reduced due to a drop in the temperature of the high-temperature gas during heating. In addition, since the coil of the electromagnetic four-way valve is constantly energized during heating, it consumes a large amount of power and has problems such as a decrease in the life of the coil and the generation of electromagnetic noise due to an increase in the temperature of the coil. Furthermore, in order to suppress the rise in temperature of the electromagnetic coil and to generate suction power, the coil had to be thickened and had a large number of turns, and the electromagnetic coil had to be large and expensive.

In addition, to take an example of a conventional electromagnetic four-way valve, the heat loss is about 100 K/h, and the human power of the electromagnetic coil is about 10 W.

SUMMARY OF THE INVENTION An object of the present invention is to provide an air conditioner with good heating efficiency by improving the above-mentioned conventional drawbacks and reducing heat loss during heating and power consumption of the electromagnetic coil.

In other words, we focused on the fact that conventional air conditioners use a single electromagnetic four-way valve to switch between cooling and heating, resulting in problems such as heat loss, large electromagnetic coils, and high power consumption. By switching between the discharge refrigerant and suction refrigerant of the compressor using separate switching valves, switching between cooling and heating is performed, and the electromagnetic coil of the electromagnetic switching valve is energized intermittently, reducing heat loss and power consumption ( Moreover, the present invention provides an air conditioner that has fewer problems such as electromagnetic noise.

An embodiment of the present invention will be described below. In Fig. 2, 9 is a compressor, 10 is an electromagnetic three-way valve, 11 is an outdoor heat exchanger, 1
2 is an indoor heat exchanger, 13.14 is a capillary, 15.1
6 is a check valve, and 17 is a differential pressure type three-way valve.

First, in the cooling state, the electromagnetic three-way valve 10 operates as shown in FIGS. 3 and 4.
As shown in the figure, the valve body 21 is pushed down by the return spring 19 via the plunger 20, and the ball 21 interlocks with the valve body 21.
2, port CI QC is blocked and port BIOB
and port AI OA communicate. That is, in the refrigerant circuit of FIG. 2, 9-10B-10A-11-13-
The heat flows in the order of 16-12-17C-17B-9, radiates heat in the outdoor heat exchanger 11, and absorbs heat in the indoor heat exchanger 12, thereby cooling the room. Next, when heating, the electromagnetic coil 2
3 by applying a DC voltage that generates an electromagnetic force in the same direction as the permanent magnet 24 to attract the plunger 20.
The force of the permanent magnet 24 and the electromagnetic coil 23 causes the return spring 19
Overcoming the force, the plunger 20 is sucked, the valve body 21 and the ball 22 are rotated, and the ball 22 is moved from the C boat to the A boat.
When moving to the port, the C boat is opened and the A port is closed. In other words, the electromagnetic three-way valve opens between B and C and opens between B and A, and the high-pressure discharge gas flows to the C boat side, so the differential pressure three-way valve 17
In Figure 5, the A boat 17A side has high pressure, so
The movable valve 26 is pushed in the direction of the arrow, so that the A boat 17A is closed and the B-C ports 17B and 17C are opened.

That is, in FIG. 2, the refrigerant is 9-10B-10C-12-
The heat flows in the order of 14-15-11-17A-17B-9, radiates heat in the indoor heat exchanger 12, and absorbs heat in the outdoor heat exchanger 11, thereby heating the room.

Note that the electromagnetic coil 23 only needs to be energized for several seconds until the valve body 21 is switched. That is, after the valve body 21 is moved, the ball 22 is pressed against the A port IOA due to the pressure difference between the high pressure gas from the B boat IOB and the low pressure of the A boat IOA, and the plunger 20 is attracted and tightly contacts the magnetic pole face 25. Therefore, the force of the permanent magnet 24 is selected so that the sum of the attraction force of the plunger 20 by the permanent magnet 24 and the differential pressure of the refrigerant is stronger than the force of the return spring 19.

Furthermore, when switching from heating to cooling, a DC voltage in the opposite direction to that during heating is applied to the electromagnetic coil 23, and the magnetic force of the permanent magnet is canceled by the reverse magnetic field of the electromagnetic coil 23, so that the force of the return spring 19 causes the valve body 21 to be It is switched by rotating it.

That is, they are selected so that the following relationship holds: (1) refrigerant differential pressure <return spring force (2) refrigerant differential pressure + permanent magnet force> return spring force (3) refrigerant differential pressure + return spring force <coil attraction force. However, since the electromagnetic coil 23 is energized for a short time, there is no need to consider coil temperature rise or power consumption (current flow), so the electromagnetic coil can be made smaller than conventional ones.

As described above, according to the present invention, by switching between compressed @9 high-temperature, high-pressure discharge gas and low-temperature, low-pressure suction gas using separate switching valves, it is possible to reduce the reduction in heating capacity due to heat exchange between refrigerants, and The electromagnetic coil only needs to be installed in the electromagnetic three-way valve 10, and it only needs to be energized for a few seconds when switching between cooling and heating, so the power consumption of the coil is equal to 0, and there is no increase in the temperature of the coil, deterioration of its life, or electromagnetic noise. This has great effects, such as eliminating the risk of problems such as the following.

In the electromagnetic three-way valve lO, either boat A or C becomes a low-pressure boat, but as shown in Figure 3, the low-pressure refrigerant is blocked and the area is small, so there is almost no heat loss.
While the heat loss of a conventional four-way valve is about 100 K-/h, the combined heat loss of the electromagnetic three-way valve 10 and the differential pressure three-way valve of the present invention can be reduced to less than V2 of the conventional one.

The present invention uses an artificial boat IOB on the discharge side of the compressor 9, and an outlet port IOA on the outdoor heat exchanger 11 and the indoor heat exchanger 12.
, an electromagnetic three-way valve 17 that can switch IOc, and a differential pressure three-way valve 17 that can switch the output bow) 17B on the suction side of the compressor 9 and the artificial bow) 17A, 17C between the outdoor heat exchanger l] and the indoor heat exchanger 12. As a result, heat loss during heating can be significantly reduced. In addition, the electromagnetic three-way valve 10
By providing the electromagnetic coil 23 and the return spring 19 as a driving source, and the permanent magnet 24 as a holding source, the coil of the electromagnetic three-way valve can be energized intermittently for only a few seconds, reducing the power consumption of the electromagnetic coil 23. can be made almost equal to 0, and an air conditioner can be easily manufactured that has great effects such as reducing the size of the coil and preventing the generation of electromagnetic noise.

[Brief explanation of the drawing]

FIG. 1 is a refrigerant circuit diagram of a conventional air conditioner, FIG. 2 is a refrigerant circuit diagram of an air conditioner showing an embodiment of the present invention, and FIG.
FIG. 4 is a sectional view of the electromagnetic three-way valve, and FIG. 5 is a sectional view of the differential pressure three-way valve. 9...Compressor, lO...Solenoid three-way valve, 11...
Outdoor heat exchanger, 12... Indoor heat exchanger, 13.14.
...Capillary, 15.16...Check valve, 17...
Differential pressure type three-way valve, 19...Return spring, 20...Plunger, 21...Valve body, 22...Ball, 23...
Electromagnetic coil, 24...Permanent magnet. Figure 2

Claims (1)

[Claims] 1. An electromagnetic type in which the discharge side of the compressor (9) is an artificial port (10B) and the outlet ports Cl0A, 10C) are switched between an outdoor heat exchanger (11) and an indoor heat exchanger (12). Three-way valve (1
0) and the suction side of the compressor (9) to the outlet boat (17B
) and has a differential pressure type three-way valve (17) that can switch the inlet ports (17A, 17C) between the outdoor heat exchanger (11) and the indoor heat exchanger (12), and the electromagnetic type three-way valve (10).
) is equipped with an electromagnetic coil (23) and a return spring (19) as a driving source.
) and a permanent magnet (24) as a holding source, so that the operation of the electromagnetic three-way valve is made to be intermittently energized. 2. The air conditioner according to claim 1, wherein the voltage applied to the electromagnetic coil (23) is applied in opposite directions during cooling and heating.