JP2001280766A - Air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air conditioner for rapidly conducting defrosting of an outdoor heat exchanger while continuing a heating operation. SOLUTION: In the air conditioner, a compressor 1, a four-way valve 2, an outdoor heat exchanger 3 and an expansion valve 4 for constituting an outdoor unit A and an indoor heat exchanger 5 for constituting an indoor unit B are sequentially connected via connecting piping. In this case, an auxiliary heat exchanger 6 is connected from the four-way valve to the outdoor heat exchanger. In the case of defrosting, the heating operation can be simultaneously continued with the outdoor heat exchanger and the indoor heat exchanger used as a condenser and with the auxiliary heat exchanger used as an evaporator.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner, and more particularly to a structure capable of quickly defrosting an outdoor heat exchanger while heating operation is continued.

[0002]

2. Description of the Related Art As shown in FIG. 3, for example, 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 unit B which constitute an outdoor unit A.
And the indoor heat exchanger 5 is sequentially connected by a connection pipe to form a refrigeration cycle. During the cooling operation, a refrigerant circuit as shown by a solid arrow is formed, and during a heating operation, a refrigerant as shown by a dashed arrow. A circuit was formed.

However, when defrosting the frost adhering to the outdoor heat exchanger 3 during the heating operation, for example, the refrigeration cycle is quickly removed by a reverse method in which the refrigerant circuit is switched from the refrigerant circuit in the heating operation to the refrigerant circuit in the cooling operation. Although it was frosted, in this case, there was a drawback that the heating operation was temporarily interrupted.

Alternatively, defrosting is performed by a hot gas bypass system in which the discharged gas is mixed with the outdoor heat exchanger 3 in the refrigerant circuit during the heating operation. In this case, the heating operation is continued, but the discharged gas is discharged. And the two-phase refrigerant (low temperature) are mixed to perform the defrost, so that there is a disadvantage that the defrost time becomes long.

[0005]

SUMMARY OF THE INVENTION In view of the above-mentioned problems, the present invention provides an air conditioner capable of rapidly defrosting an outdoor heat exchanger while continuing a heating operation. Aim.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a compressor constituting an outdoor unit, a four-way valve,
In an air conditioner in which an outdoor heat exchanger and an expansion valve and an indoor heat exchanger constituting an indoor unit are sequentially connected by a connection pipe, auxiliary heat exchange is performed between the four-way valve and the outdoor heat exchanger. When the defrosting operation is performed, the outdoor heat exchanger and the indoor heat exchanger are used as a condenser, and the auxiliary heat exchanger is used as an evaporator so that the heating operation can be simultaneously continued. I have.

[0007] Further, the auxiliary heat exchanger is arranged close to the compressor.

Further, an electromagnetic valve for limiting the amount of refrigerant flowing into the auxiliary heat exchanger is provided between the four-way valve and the auxiliary heat exchanger and between the auxiliary heat exchanger and the outdoor heat exchanger. It is configured to connect the provided bypass path.

An auxiliary expansion valve is provided between the auxiliary heat exchanger and a connection portion of the bypass passage connected between the auxiliary heat exchanger and the outdoor heat exchanger. By adjusting the degree of opening and closing with the expansion valve provided between the outdoor heat exchanger and the indoor heat exchanger, respectively, the outdoor heat exchanger, the indoor heat exchanger, and / or the auxiliary heat exchange The device is configured to function as a condenser and / or an evaporator.

The interior of the outdoor unit includes a heat exchanger room having the outdoor heat exchanger and the like in which a blower is opposed by a partition plate, and the compressor and the like in which the auxiliary heat exchanger is provided. The partition plate is divided into a compressor room, and the partition plate is provided with a vent hole connecting the outdoor heat exchanger and the auxiliary heat exchanger.

Further, the auxiliary heat exchanger is formed so as to be substantially parallel to the partition plate, and is provided between the partition plate and the compressor.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention will be described below as examples based on the attached drawings. 1 is a refrigeration cycle diagram of an air conditioner according to the present invention, FIG. 2 is an explanatory diagram of an outdoor unit constituting the air conditioner according to the present invention, (A) is a transmission plan view, and (B) is a main part. It is a perspective view.

In the figure, A is an outdoor unit constituting the air conditioner according to the present invention, 1 is a compressor constituting the outdoor unit A, 2 is a four-way valve, 3 is an outdoor heat exchanger, 4 is an expansion valve, B is an indoor unit constituting the air conditioner according to the present invention, and 5 is an indoor heat exchanger constituting the indoor unit B.

Next, in the air conditioner having the above-described basic configuration, the outdoor heat exchanger 3 is maintained while the heating operation is continued.
A structure that can quickly perform the defrosting will be described below. When an auxiliary heat exchanger 6 is connected between the four-way valve 2 and the outdoor heat exchanger 3 to perform a defrosting operation, the outdoor heat exchanger 3 and the indoor heat exchanger 5 are used as condensers,
By allowing the auxiliary heat exchanger 6 to be used as an evaporator so that the heating operation can be continued at the same time, the outdoor heat exchange can be performed while the heating operation is continued without interrupting the heating operation as in the related art described above. The defrosting of the vessel 3 can be performed quickly, and comfortable air conditioning can be realized.

The auxiliary heat exchanger 6 is connected to the compressor 1
, The compressor 1 rises in temperature and heats the auxiliary heat exchanger 6, so that the auxiliary heat exchanger 6 is used as a more effective evaporator to continue the heating operation at the same time. become able to.

The amount of refrigerant flowing into the auxiliary heat exchanger 6 is set between the four-way valve 2 and the auxiliary heat exchanger 6 and between the auxiliary heat exchanger 6 and the outdoor heat exchanger 3. The auxiliary heat exchanger 6 functions as a more effective evaporator by closing the electromagnetic valve 7 during the heating operation and the defrosting operation by connecting the bypass passage 8 including the restricting electromagnetic valve 7. By opening the electromagnetic valve 7 during the cooling operation, the auxiliary heat exchanger 6 can be bypassed.

An auxiliary expansion valve 9 is provided between the auxiliary heat exchanger 6 and a connection portion of the bypass passage 8 connected between the auxiliary heat exchanger 6 and the outdoor heat exchanger 3. By adjusting the opening / closing degree of the auxiliary expansion valve 9 and the expansion valve 4 provided between the outdoor heat exchanger 3 and the indoor heat exchanger 5, respectively, the outdoor heat exchanger 3 and the indoor By allowing the heat exchanger 5 and / or the auxiliary heat exchanger 6 to function as a condenser and / or an evaporator, the throttle valve of the expansion valve 4 is adjusted during the heating operation, and the auxiliary expansion valve 9 is fully opened. By closing the electromagnetic valve 7, the auxiliary heat exchanger 6 and the outdoor heat exchanger 3 function as more effective evaporators. During the defrosting operation, the expansion valve 4 is fully opened. , The throttle of the auxiliary expansion valve 9 is adjusted to By closing the valve 7, the outdoor heat exchanger 3 and the indoor heat exchanger 5 as a condenser,
The auxiliary heat exchanger 6 functions as an evaporator. During cooling operation, the expansion valve 4 is throttled, the auxiliary expansion valve 9 is fully closed, and the electromagnetic valve 7 is opened.
The surrounding temperature of the auxiliary heat exchanger 6 is high due to the heat generated by the compressor 1, and the use of the auxiliary heat exchanger 6 as a condenser lowers the efficiency, so that the refrigerant can be prevented from flowing.

As shown in FIGS. 2A and 2B, the inside of the outdoor unit A has the outdoor heat exchanger 3 and the like in which a blower 11 is opposed by a partition plate 10. And a compressor room having the compressor 1 and the like, in which the auxiliary heat exchanger 6 is provided, and the partition plate 10 is provided.
In addition, since the ventilation hole 10a connecting the outdoor heat exchanger 3 and the auxiliary heat exchanger 6 is provided, a ventilation path to the auxiliary heat exchanger 6 can be connected to a ventilation path of the heat exchanger room.

Further, the auxiliary heat exchanger 6 is provided with the partition plate.
The auxiliary heat exchanger 6 is formed in a shape substantially parallel to the partition 10 and is disposed between the partition plate 10 and the compressor 1 so that the auxiliary heat exchanger 6 can be placed in a narrow space facing the air hole 10a. Can be installed effectively.

With the above configuration, as shown in FIGS. 1, 2A and 2B, the auxiliary heat exchange between the outdoor heat exchanger 3 and the suction pipe of the compressor 1 is performed. When the defrosting operation is performed by connecting the heat exchanger 6, the outdoor heat exchanger 3 and the indoor heat exchanger 5 are used as condensers, and the auxiliary heat exchanger 6 is used as an evaporator so that the heating operation can be simultaneously continued. Therefore, the defrosting of the outdoor heat exchanger 3 can be promptly performed without interrupting the heating operation as in the above-described prior art, while continuing the heating operation, thereby realizing comfortable air conditioning. It becomes an air conditioner that can do it.

[0021]

As described above, according to the present invention, there is provided an air conditioner capable of quickly performing defrosting of an outdoor heat exchanger while heating operation is continued.

[Brief description of the drawings]

FIG. 1 is a refrigeration cycle diagram of an air conditioner according to the present invention.

FIG. 2 is an explanatory view of an outdoor unit constituting the air conditioner according to the present invention, wherein (A) is a transparent plan view and (B) is a perspective view of a main part.

FIG. 3 is a refrigeration cycle diagram of an air conditioner according to a conventional example.

[Explanation of symbols]

 A Outdoor unit B Indoor unit 1 Compressor 2 Four-way valve 3 Outdoor heat exchanger 4 Expansion valve 5 Indoor heat exchanger 6 Auxiliary heat exchanger 7 Solenoid valve 8 Bypass path 9 Auxiliary expansion valve 10 Partition plate 10a Vent hole

Claims (6)

[Claims] 1. An air conditioner in which a compressor, a four-way valve, an outdoor heat exchanger, and an expansion valve constituting an outdoor unit and an indoor heat exchanger constituting an indoor unit are sequentially connected by a connection pipe. A four-way valve, connecting an auxiliary heat exchanger between the outdoor heat exchanger, when performing a defrosting operation, the outdoor heat exchanger and the indoor heat exchanger as a condenser, the auxiliary heat exchanger An air conditioner characterized in that heating operation can be simultaneously continued as an evaporator. 2. The air conditioner according to claim 1, wherein the auxiliary heat exchanger is disposed near the compressor. 3. Between the four-way valve and the auxiliary heat exchanger and between the auxiliary heat exchanger and the outdoor heat exchanger,
The air conditioner according to claim 1 or 2, wherein a bypass having an electromagnetic valve for limiting an amount of refrigerant flowing into the auxiliary heat exchanger is connected. 4. An auxiliary expansion valve is provided between the auxiliary heat exchanger and a connection portion of the bypass passage connected between the auxiliary heat exchanger and the outdoor heat exchanger. ,
By adjusting the degree of opening and closing with the expansion valve provided between the outdoor heat exchanger and the indoor heat exchanger, respectively,
The said outdoor heat exchanger, the said indoor heat exchanger, and / or the said auxiliary heat exchanger were made to function as a condenser and / or an evaporator, The Claims any one of Claims 1 thru | or 3 characterized by the above-mentioned. Air conditioner. 5. The interior of the outdoor unit includes a heat exchanger room having the outdoor heat exchanger and the like in which a blower is opposed by a partition plate, and the compressor and the like in which the auxiliary heat exchanger is provided. The air conditioner according to claim 2 or 4, wherein the partition plate is divided into a compressor room, and the partition plate is provided with a vent hole connecting the outdoor heat exchanger and the auxiliary heat exchanger. Machine. 6. The apparatus according to claim 1, wherein the auxiliary heat exchanger is formed in a shape substantially parallel to the partition plate, and is provided between the partition plate and the compressor. The air conditioner according to claim 5.