JPS5912270A - 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. 1, and includes a compressor 1, an electromagnetic four-way valve 2, an outdoor heat exchanger 3, an indoor heat exchanger 4.
Consists of a capillary 5.6 and a check valve 7.8,
During cooling, the electromagnetic coil (not shown) of the four-way electromagnetic 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 is switched as shown by the dotted line, and the refrigerant is 1-2-4-
The heat flows in the order of 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. Furthermore, 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 approximately 100 I'W/h, and the human power of the electromagnetic coil is approximately 10W.
It also reaches.

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. The present invention provides an air conditioner with fewer problems such as electromagnetic noise.

An embodiment of the present invention will be described below. In Fig. 2, 9 is a compressor, 1O 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, as shown in FIGS. 3 and 4, the solenoid three-way valve 10 pushes down the valve body 21 via the plunger 20 by the return spring 19, and the boat CIOC is closed by the ball 22 interlocking with the valve body 21. , BO) BIOB and BOAT Al0A
is connected. In other words, in the refrigerant circuit of Fig. 2, the solid line
9-10B-10A-11-13-16-12-17
The heat flows in the order of G-17B-9, radiates heat in the outdoor heat exchanger 11, and absorbs heat in the indoor heat exchanger 12, thereby cooling the room.

Next, during heating, by applying a DC voltage that generates an electromagnetic force in the same direction as the permanent magnet 24 so as to attract the plunger 20 to the electromagnetic coil 23, the force of the permanent magnet 24 and the electromagnetic coil 23 becomes the force of the return spring 19. The plunger 2o is suctioned and the valve body 21 and the ball 22 are rotated.
The ball 22 moves from the C boat to the A boat, with the C boat being open and the A boat being 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 opens between A and B in FIG.
Since the pressure on the side 17A is high, the movable valves 28 and 29 are pushed in the direction of the arrow, the A port 17A is closed, and the ports 17B and 17C between the B and C boats are opened. That is, in FIG. 2, the refrigerant is 9-10B-IOC-12-14-15-11-
17A-17B-9, the indoor heat exchanger 12 radiates heat, and the outdoor heat exchanger 11 absorbs heat, 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 moves, the ball 22 is pressed against the A boat 10A due to the pressure difference between the high pressure gas from the B port 10B and the low pressure at the A port 10A, and the plunger 20 is attracted and comes into close contact with the magnetic pole face 25. Therefore, the force of the permanent magnet 24 shall be 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. Next, as shown in FIG. The differential pressure type three-way valve will be explained. An outlet port 17B is provided in the center of the hollow body 26, and two nylon movable valves 28, 29 connected by a bar 27 and interlocking with each other are housed in the left and right hollow parts, and caps 30, 31 are connected to both left and right ends. Two artificial boats 17A, 17
A groove is provided on the outer periphery of the cap 30.31 and the θ ring 32.33 is fitted therein.
Caulk both ends 17D and 17E of the body through the screws. Note that the material of the θ ring is usually heat-resistant rubber, but stainless steel wire can also be used if it is to be made more heat resistant.

Conventionally, in this type of switching valve, all connections between the body and the cap were brazed, so when the nylon valve 28, 29 is inside like this differential pressure type three-way valve, the valve deforms due to heating of the brazed part. Therefore, it was necessary to make the switching valve longer than necessary in order to separate the solder part from the valve part.

However, in the differential pressure type three-way valve structure of the present invention, the body ends 17D and 17E are caulked through the θ rings 32 and 33 to provide airtightness, so there is no need to heat the material of the movable valve 28 and 29. The refrigerant can be made of plastic such as nylon, which has good sealing properties, and the size of the differential pressure type three-way valve can be reduced, so that heat loss from the high-pressure refrigerant port can also be reduced. In addition, although the C port side is a high-pressure port in FIG. 5, since the refrigerant does not flow as shown in FIG. 2, there is almost no effect on the temperature of the high-temperature refrigerant flowing to the indoor heat exchanger 12. It is.

As described above, according to the present invention, by switching the high-temperature, high-pressure discharge gas and the low-temperature, low-pressure suction gas of the compressor 9 using separate switching valves, it is possible to reduce the reduction in heating capacity due to heat exchange between refrigerants, and The differential pressure type three-way valve 17 can be made small and have good sealing properties, and while the conventional four-way valve has a heat loss of about 100 K4'h, the electromagnetic type three-way valve 10 and the differential pressure type three-way valve of the present invention The combined heat loss of the valve 17 can be lower than that of the conventional IA.Also, since the electromagnetic coil is not required for the differential pressure type three-way valve 17,
Since it only needs to be provided in the electromagnetic three-way valve 10, and it only needs to be energized for a few seconds when switching between cooling and heating, the power consumption of the coil is almost equal to 0, and the power consumption of the coil can be reduced. In addition, it has great effects such as eliminating the risk of problems such as increase in coil temperature, deterioration of coil life, and generation of electromagnetic noise.

In the present invention, the discharge side of the compressor 9 is set to the outlet bow) 10B, and the outdoor heat exchanger 11 and the indoor heat exchanger 12 are connected to the outlet bow) 10A.
, lOc, and the suction side of the compressor 9 is the outlet port 17B. , heat loss during heating can be significantly reduced. In addition, the structure of the differential pressure type three-way valve 17 is changed to a movable valve 28.2 that interlocks the left and right sides of the hollow body 26.
9 and an exit bow on the center side) 17A.

17c is provided, and the left and right ends are caulked to the body 26 through θ rings, so that the movable valves 28 and 29 can be made of nylon, producing a compact differential pressure type three-way valve 17 with good sealing performance, and thus an electromagnetic four-way valve. By separating the electromagnetic three-way valve and the differential pressure three-way valve, it is possible to easily manufacture an air conditioner that has great effects such as reducing heat loss and reducing power consumption by intermittent energization of the electromagnetic coil.

[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 type three-way valve. 9... Compressor, 10... 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, 26...Hollow body, 28.29...
・Movable valve, 32.33...θ ring. Figure 3 IOA Figure 4 Figure 5

Claims (1)

[Claims] 1. The discharge side of the compressor (9) is an artificial boat Cl0B), and an outlet port 1-(l OA, I 0( 1), and the suction side of the compressor (9) is used as the outlet port (17B), and is connected to the outdoor heat exchanger (11) and the indoor heat exchanger (12). 17C) in an air conditioner having a differential pressure type three-way valve (17) that can switch. The structure of the differential pressure type three-way valve 17 is such that movable valves (28, 29) interlocked with the left and right sides of the hollow body (26) are provided, an outlet bow (17B) is provided on the central side, and artificial boats (17B) are provided on both the left and right ends.
A, 17c) is provided, and both left and right ends are provided with θ rings (3
An air conditioner characterized in that the body (26) is caulked through the body (26).