JP2003130483A - Air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air conditioner capable of increasing the efficiency of a refrigerating cycle by providing a heat exchange part allowing space saving to increase a supercooling area. SOLUTION: In cooling operation, a first solenoid valve 13 is opened and a second solenoid valve 14 is closed to exchange heat from pipe to pipe between a connection pipe 6 on the outlet side of an outdoor heat exchanger 3 and a closed circuit 9 forming a first heat exchange part 7 and continued to the suction side of a compressor 1. In heating operation, the first solenoid valve 13 is closed and the second solenoid valve 14 is opened to exchange heat between the connection pipe 6 on the outside of the indoor heat exchanger 5 and the closed circuit 9 forming a second heat exchange part 8 and continued to the fourth port d of a four-way valve 2 through pipes.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner, and more particularly, to a supercooling area provided with two heat exchange units capable of saving space. And to improve the efficiency of the refrigeration cycle. 2. Description of the Related Art As shown in FIG. 2, a conventional air conditioner includes a compressor 1, a four-way valve 2, an outdoor heat exchanger 3, an expansion valve 4, and an indoor heat exchanger 5. Are connected in sequence by a connection pipe 6, and in the cooling operation, the refrigerant, the four-way valve 2, the outdoor heat exchanger 3, the expansion valve 4, and the indoor heat exchange as indicated by the practical arrows are shown. During the heating operation, the refrigerant circulates to the compressor 1, the four-way valve 2, the indoor heat exchanger 5, the expansion valve 4, and the outdoor heat exchanger 3 as indicated by a broken arrow. It was a configuration consisting of However, in recent years, the efficiency of the refrigeration cycle can be further improved without increasing the size of the outdoor heat exchanger 3 or the indoor heat exchanger 5 or increasing the size of the indoor and outdoor blowers. Was desired. SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems, and increases the supercooling area by providing two heat exchange units capable of saving space, thereby increasing the efficiency of the refrigeration cycle. An object is to provide an air conditioner that can be improved. [0005] In order to solve the above problems, the present invention provides a compressor, a four-way valve having first to fourth ports, an outdoor heat exchanger, and an expansion valve. , An indoor heat exchanger, a discharge side of the compressor, a first port and a second port of the four-way valve, the outdoor heat exchanger, the expansion valve, the indoor heat exchanger, and the four-way valve. Connecting the connection pipe connecting the third port and the fourth port of the valve, between the outdoor heat exchanger and the expansion valve, and between the expansion valve and the indoor heat exchanger along the connection pipe; A closed circuit forming a first heat exchange section and a second heat exchange section, a suction side of the compressor, one side of the closed circuit, a fourth port of the four-way valve, and the other side of the closed circuit. A connection pipe for connecting the connection pipe and one side of the closed circuit. A connection portion provided via a connection portion and provided with a first check valve and a second check valve that are opened in a forward direction with respect to the connection portion, and a connection portion that connects the connection pipe and the other side of the closed circuit. A first solenoid valve provided on the first heat exchange unit side and a second solenoid valve provided on the second heat exchange unit side via the first opening of the first solenoid valve during cooling operation With, so as to exchange heat in the first heat exchange section by closing the second solenoid valve, during the heating operation, the first port and the third port of the four-way valve, the second port and the fourth port. Are connected to each other to close the second solenoid valve and open the first solenoid valve so that heat is exchanged in the second heat exchange unit. Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a refrigeration cycle diagram of an air conditioner according to the present invention. As shown in FIG. 1, the air conditioner according to the present invention comprises a compressor 1, a four-way valve 2 having first to fourth ports ad, an outdoor heat exchanger 3, and an expansion valve 4. And an indoor heat exchanger 5. The discharge side of the compressor 1, the first port a and the second port b of the four-way valve 2, the outdoor heat exchanger 3, the expansion valve 4, and the indoor heat exchanger 5 And a connection pipe 6 for connecting the third port c and the fourth port d of the four-way valve 2, between the outdoor heat exchanger 3 and the expansion valve 4, the expansion valve 4 and the indoor heat exchanger 5 A closed circuit 9 that forms the first heat exchange unit 7 and the second heat exchange unit 8 by extending along the connection pipe 6 between the first and second heat exchangers, and the suction side of the compressor 1 and one side of the closed circuit 9 And a connection pipe 6 for connecting the fourth port d of the four-way valve 2 to the other side of the closed circuit 9. Further, the closed circuit 9 has a first check valve 11 and a second check valve which open in a forward direction toward a connection portion 10 with a connection pipe 6 connected to the suction side of the compressor 1, respectively. A valve 12 is provided, and a first solenoid valve 13 and a second solenoid valve 14 are provided via a connection portion 10 with a connection pipe 6 connected to a fourth port d of the four-way valve 2. The first check valve 11 and the second check valve 12 and the first solenoid valve 13 and the second solenoid valve 14 are connected to one side of the closed circuit 9 shown in FIG. The left and right positions on the other side may be interchanged, and the connecting portion 10 may be similarly arranged so that the left and right positions are interchanged. Next, the operation of the above configuration will be described. By the refrigeration cycle having the above configuration, during the cooling operation, the first solenoid valve 13 is opened and the second solenoid valve 14 is closed so that the liquid refrigerant flows through the outlet side of the outdoor heat exchanger 3. Connection pipe 6
And the first heat exchanging section 7 and the closed circuit 9 connected to the suction side of the compressor 1 and through which gaseous refrigerant flows so that heat can be exchanged between the tubes. Become. Thus, the heat exchange efficiency of the refrigeration cycle can be increased by the first heat exchange section 7,
The performance as an air conditioner can be further improved without increasing the size of the outdoor heat exchanger 3 or the indoor heat exchanger 5 or increasing the size of indoor and outdoor blowers (not shown). . In this case, the refrigerant exchanged by the first heat exchange section 7 is prevented from flowing into the second heat exchange section 8 which is not exchanged by the second check valve 12. . During the heating operation, the first port a and the third port c of the four-way valve are connected to the second port b and the fourth port d to close the first solenoid valve 13, while By opening the second solenoid valve 14,
The connection pipe 6 on the outlet side of the indoor heat exchanger 5 through which the liquid refrigerant flows, and the second heat exchange section 8 constitute a gaseous refrigerant connected to the fourth port d of the four-way valve 2. Heat can be exchanged between the tubes with the flowing closed circuit 9. Thus, the heat exchange efficiency of the refrigeration cycle can be increased by the second heat exchange section 8,
The performance as an air conditioner can be further improved without increasing the size of the outdoor heat exchanger 3 or the indoor heat exchanger 5 or increasing the size of indoor and outdoor blowers (not shown). . In this case, the refrigerant exchanged by the second heat exchange section 8 is prevented from flowing into the first heat exchange section 7 which is not exchanged by the first check valve 11. . As described above, according to the present invention,
By providing a heat exchange unit capable of saving space, the air conditioner can increase the supercooling region and improve the efficiency of the refrigeration cycle.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a refrigeration cycle diagram of an air conditioner according to the present invention. FIG. 2 is a refrigeration cycle diagram of an air conditioner according to a conventional example. [Description of Signs] 1 Compressor 2 Four-way valve 3 Outdoor heat exchanger 4 Expansion valve 5 Indoor heat exchanger 6 Connection pipe 7 First heat exchange unit 8 Second heat exchange unit 9 Closed circuit 10 Connection unit 11 First check Valve 12 Second check valve 13 First solenoid valve 14 Second solenoid valve

Claims (1)

Claims 1. A compressor comprising: a compressor, a four-way valve having first to fourth ports, an outdoor heat exchanger, an expansion valve, and an indoor heat exchanger. The discharge side, the first port and the second port of the four-way valve, the outdoor heat exchanger, the expansion valve, and the third port and the fourth port of the indoor heat exchanger and the four-way valve are connected. The connection pipe, between the outdoor heat exchanger and the expansion valve, and along the connection pipe between the expansion valve and the indoor heat exchanger, the first heat exchange unit and the second heat exchange unit And a connection pipe for connecting the suction side of the compressor, one side of the closed circuit and a fourth port of the four-way valve and the other side of the closed circuit, respectively, and the connection pipe It is provided through a connecting portion connecting one side of the closed circuit, and is provided in a forward direction with respect to the connecting portion. A first check valve and a second check valve, and a first electromagnetic unit provided on the first heat exchange unit side through a connection unit connecting the connection pipe and the other side of the closed circuit. A valve and a second solenoid valve provided on the side of the second heat exchange unit. During the cooling operation, the first heat exchange unit is opened by opening the first solenoid valve and closing the second solenoid valve. In the heating operation, the first port and the third port of the four-way valve are connected to the second port and the fourth port, respectively, and the second solenoid valve is closed, and the first solenoid valve is closed. An air conditioner characterized in that heat is exchanged in the second heat exchange section by opening an electromagnetic valve.