JP2000274804A - Air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air conditioning indoor machine, secure subcooling, improve heating performance at a low cost, and save energy. SOLUTION: This air conditioner comprises a compressor contained in an outdoor machine; an outdoor heat-exchanger, a throttle device, and an indoor apparatus provided with an indoor heat-exchanger having two paths arrayed in two trains in a manner to extend orthogonally to a draft direction. The members described above are orderly interconnected through a refrigerant piping to form a refrigerant circuit. In a so formed air conditioner, a central part forming the outflow side during condensation of one of the trains of an indoor heat-exchanger 11 is notched, one train part 11a being only the other train remaining and two train parts 11b are situated thereabove and therebelow.

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 an indoor heat exchanger.

[0002]

2. Description of the Related Art FIG. 6A is a sectional view of an indoor heat exchanger of an air conditioner showing an example of the related art, and FIG. 6B is a sectional view of a main part. FIG. 7 is a refrigerant circuit diagram of an air conditioner showing an example of the related art. As shown in the figure, a refrigerant circuit of a conventional air conditioner includes a compressor 2 housed in an outdoor unit 1, a four-way valve 3,
The outdoor heat exchanger 5, the expansion device 6, and the indoor heat exchanger 11 housed in the indoor unit 10 are sequentially connected to form a refrigerant circuit.

In the above configuration, during the cooling operation, the refrigerant flow in the outdoor unit 1 passes through the compressor 2 and the four-way valve 3 to the two-pass outdoor heat exchanger 5 as indicated by a broken line arrow. The refrigerant flows from the outdoor heat exchanger 5 via the expansion device 6 into the indoor heat exchanger 11 of the indoor unit 10. And
The refrigerant returns to the compressor 2 via the four-way valve 3 of the outdoor unit 1. Further, during the heating operation, the refrigerant flow path returns to the compressor 2 via the expansion device 6 along a path opposite to that during the cooling as indicated by a solid arrow.

The indoor heat exchanger 11 is composed of two rows 11x and 11y so as to be orthogonal to the ventilation direction. When the indoor heat exchanger 11 becomes a condenser,
When subcooling (supercooling) is taken, the amount of refrigerant is increased, the amount of throttle is increased, and the amount of air is increased. In addition, when the amount of the refrigerant is added, a difference between the optimum amount of the refrigerant at the time of cooling and the amount of the refrigerant at the time of heating becomes large, and a receiver or the like needs to be installed. On the other hand, if the rotation speed of the compressor 2 is increased to increase the amount of circulating refrigerant, power consumption increases and energy saving becomes difficult. Further, when the throttle amount is increased, there is a problem that the refrigerant circulation amount is reduced and the capacity may be insufficient. Alternatively, in the case of an increase in the air flow, there is a problem that power consumption may increase as the rotation speed of the fan motor increases.

[0005]

SUMMARY OF THE INVENTION In view of the above-mentioned problems, the present invention provides an air conditioner for an indoor unit which secures a sub-cooling, reduces heating cost, improves heating performance, and achieves energy saving. It is an object.

[0006]

DISCLOSURE OF THE INVENTION The present invention has been made to solve the above problems, and has a compressor, a four-way valve, an outdoor heat exchanger, a throttle device, and a filter which is orthogonal to a ventilation direction. In an air conditioner comprising two rows of indoor heat exchangers, which are sequentially connected by refrigerant pipes to form a refrigerant circuit, when air is condensed in one of the rows of the indoor heat exchangers, The outflow-side central portion is cut out, and one row portion where only the other row is left and two row portions are provided above and below it.

[0007] Then, the one row portion is made to have two passes, and the two row portion is made to have four passes. In addition, a piping connection portion that is connected to the expansion device by piping is provided at the center of the one-row portion.

[0008] A pipe connecting portion for connecting each refrigerant pipe to the four-way valve is provided at each cut end of the two-row portion, and a refrigerant pipe is connected to the other end of the two-row portion. A connecting portion for communication is provided. Alternatively, a connecting portion communicating with one end of each refrigerant pipe of the two-row portion is provided at both ends of the one-row portion, and the refrigerant pipes are communicated with each other at the other end of the two-row portion. A pipe connection part to be connected is provided. In the center of each of the two rows, an intersecting portion for exchanging the refrigerant pipes on the leeward and leeward sides is provided.

On the other hand, the refrigerant pipes are arranged so that the one row portion has one pass and the two row portions have two passes. Further, a pipe connection portion connected to the throttle device by a pipe is provided at one end of the one row portion. A pipe connecting portion for connecting each refrigerant pipe to the four-way valve is provided at each of the notched ends of the two-row portion, and each of the two-row portions is provided with an uncut one end and the other of the one-row portion. A connecting portion communicating with the ends is provided, and a connecting portion communicating the refrigerant pipes with each other is provided at the other end of the two-row portion. Alternatively, a pipe connecting portion for connecting each refrigerant pipe to the four-way valve is provided at each of the uncut ends of the two-row portion, and the cut ends of the two-row portion and the other end of the one-row portion are provided. A connecting part communicating with the end is provided,
The other end of the two-row portion is provided with a connecting portion for connecting the refrigerant pipes to each other.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail based on embodiments with reference to the accompanying drawings. FIG.
(A) is a cross-sectional view of an indoor heat exchanger of an air conditioner showing one embodiment of the present invention, (b) is a cross-sectional view of a main part, and FIG. 7 is an air conditioner showing one embodiment of the present invention. It is a refrigerant circuit diagram. 1 is a refrigerant circuit diagram of an air conditioner showing one embodiment of the present invention. The same numbers are used for the same components. In the figure, 1 is an outdoor unit, 2 is a compressor, 3 is a four-way valve, 5 is an outdoor heat exchanger, 6 is a throttle device, 10 is an indoor unit, and 11 is an indoor heat exchanger. In this embodiment, expansion valves are used for the outdoor heat exchangers 5 arranged in two rows having two passes and the expansion device 6.

[0011] The compressor 2, housed in the outdoor unit 1, a four-way valve 3, an outdoor heat exchanger 5, a throttle device 6, and an indoor heat source having two paths arranged in two rows perpendicular to the ventilation direction. An indoor unit 10 having an exchanger 11 is connected by a refrigerant pipe to form a refrigerant circuit.

At this time, a central portion on one side of the indoor heat exchanger 11 which becomes an outflow side when condensing is cut off, and only one other row is left, and two rows 11b above and below the one row portion 11a. Is provided. In the case of this embodiment,
Both the first row portion 11a and the second row portion 11b have two passes so that the number of passes does not change.

In addition, a piping connection portion 11a1 is provided at the center of the one-row portion 11a. A pipe connecting portion 11b1 for connecting each refrigerant pipe to the four-way valve 3 is provided at each of the cut ends of the two-row portion 11b. At the same time, the connecting portion 1 for connecting the refrigerant pipes to each other at the other end of the two-row portion 11b.
1c is provided.

Next, the operation of the present invention in the above configuration will be described. The first row portion 5a is connected to the indoor heat exchanger 11
Therefore, the air passing through the indoor heat exchanger 11 can easily pass through the single-row portion 11a, which is a portion having low resistance. For this reason, a subcool (supercooling) amount can be secured using the wind speed distribution.

FIG. 2A is a sectional view of an indoor heat exchanger of an air conditioner showing another embodiment of the present invention, and FIG. 2B is a sectional view of a main part. In the case of this embodiment, a connecting portion 11d communicating with one end of each refrigerant pipe of the two-row portion 11b is provided at both ends of the one-row portion 11a, and a refrigerant pipe is provided at the other end of the two-row portion 11b. A piping connection portion 11b2 is provided which communicates with each other and is connected to the four-way valve 3 by piping. And
The first row portion 11a has two passes, and the second row portion 11b has four passes.
Make it a path.

The operation in this case is the same as that of the embodiment of FIG. 1, and the sub-cooling (supercooling) amount is secured by using the wind speed distribution by the single-row portion 11a in which the number of passes is reduced to two passes. .

FIG. 3A is a sectional view of an indoor heat exchanger of an air conditioner showing another embodiment of the present invention, and FIG. 3B is a sectional view of a main part. In this embodiment, a crossing portion 1 for exchanging the refrigerant pipes on the leeward side and the leeward side is provided at the center of each of the two rows 11b.
1e is provided. The first row portion 11a has two passes and the second row portion 11b has four passes.

The operation in this case is the same as that of the embodiment of FIG. 2, and a subcool (supercooling) amount is secured by using the wind speed distribution by the single-row portion 5a in which the number of passes is reduced to two passes. .

Furthermore, since the refrigerant pipes on the leeward and leeward sides are exchanged by the crossing portion 11e, the two-row portion 1
Since the path balance of 1b is also improved, it is easy to secure a subcool (supercooling) amount.

FIG. 4A is a sectional view of an indoor heat exchanger of an air conditioner showing another embodiment of the present invention, and FIG. 4B is a sectional view of a main part. In the case of this embodiment, the one row portion 11a is 1
A refrigerant pipe is arranged on the windward side so as to form a path, and the two-row portion 11b forms two paths. The above 1
At one end of the row portion 11a, a piping connection portion 11a2 that is connected to the expansion device by piping is provided. At each of the cut ends of the two-row portion 11b, there is provided a pipe connection portion 11b1 for connecting each refrigerant pipe to the four-way valve 3.
At the same time, a connecting portion 11f is provided for connecting one end of the two-row portion 11b, which is not cut, to the other end of the one-row portion, and a connecting portion 11c for connecting a refrigerant pipe to the other end of the two-row portion 11b. Is provided.

The operation in this case is the same as that of the embodiment shown in FIG. 1, except that the number of passes is reduced to one in the row 11a to make one pass. Is secured using the wind speed distribution.

FIG. 5A is a sectional view of an indoor heat exchanger of an air conditioner showing another embodiment of the present invention, and FIG. 5B is a sectional view of a main part. In the case of this embodiment, the one row portion 11a is 1
A refrigerant pipe is arranged on the leeward side so as to form a path so that the two-row portion 11b forms two paths. The above 1
At one end of the row portion 11a, a piping connection portion 11a2 that is connected to the expansion device by piping is provided. A pipe connection portion 11b3 for connecting each refrigerant pipe to the four-way valve 3 is provided at each end of the two-row portion 11b that is not cut. At the same time, the connecting portion 1 that connects the cut-out one end of the two-row portion 11b to the other end of the one-row portion 11a.
1g, and a connecting portion 11c for connecting the refrigerant pipes to each other is provided at the other end of the two-row portion 11b.

The operation in this case is the same as that of the embodiment of FIG. 4. Since the number of passes in the one-row portion 11a is reduced to one pass, there is no difference between passes and the amount of subcooling (supercooling) can be reduced. It is secured using the wind speed distribution.

[0024]

As described above, according to the present invention, the compressor, the four-way valve, the outdoor heat exchanger, the expansion device, and the indoor heat exchanger formed in two rows so as to be orthogonal to the ventilation direction. In an air conditioner configured by sequentially connecting these with a refrigerant pipe to form a refrigerant circuit, a central portion that is an outflow side when condensing one of the rows of the indoor heat exchanger is cut off, One row portion where only the other row is left and two row portions are provided above and below it. As a result, it is possible to provide an indoor unit air conditioner that secures a sub-cooling, improves heating performance (COP) at low cost, and achieves energy saving.

[Brief description of the drawings]

FIG. 1A is a cross-sectional view of an indoor heat exchanger of an air conditioner showing one embodiment of the present invention, and FIG. 1B is a cross-sectional view of a main part.

FIG. 2A is a cross-sectional view of an indoor heat exchanger of an air conditioner showing another embodiment of the present invention, and FIG. 2B is a cross-sectional view of a main part.

FIG. 3A is a sectional view of an indoor heat exchanger of an air conditioner according to another embodiment of the present invention, and FIG. 3B is a sectional view of a main part.

FIG. 4A is a sectional view of an indoor heat exchanger of an air conditioner showing another embodiment of the present invention, and FIG. 4B is a sectional view of a main part.

FIG. 5A is a sectional view of an indoor heat exchanger of an air conditioner according to another embodiment of the present invention, and FIG. 5B is a sectional view of a main part.

FIG. 6A is a cross-sectional view of an indoor heat exchanger of an air conditioner showing an example of the related art, and FIG. 6B is a cross-sectional view of a main part.

FIG. 7 is a refrigerant circuit diagram of an air conditioner showing an example of the present invention and a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Outdoor unit 2 Compressor 3 Four-way valve 5 Outdoor heat exchanger 6 Throttle device 10 Indoor unit 11 Indoor heat exchanger 11a 1 row part 11a1 Pipe connection part 11a2 Pipe connection part 11b Two row part 11b1 Pipe connection part 11b2 Pipe connection part 11b3 Piping connection part 11c Connection part 11d Connection part 11e Crossover part 11f Connection part 11g Connection part

Claims (10)

[Claims] 1. A compressor, a four-way valve, an outdoor heat exchanger,
An air conditioner comprising an expansion device and indoor heat exchangers arranged in two rows so as to be orthogonal to the direction of ventilation, and sequentially connecting these with refrigerant pipes to form a refrigerant circuit, An air conditioner comprising: a central portion which is an outflow side when condensing one of the rows of an exchanger; and a row having two rows above and below a row where only the other row is left. . 2. The air conditioner according to claim 1, wherein the refrigerant pipes are arranged such that the one row portion has two passes and the two row portions have four passes. 3. The air conditioner according to claim 2, wherein a pipe connection portion connected to the throttle device by a pipe is provided at the center of the one row portion. 4. A pipe connecting portion for connecting each refrigerant pipe to the four-way valve at each cut-off one end of the two-row portion, and connecting a refrigerant pipe to each other at the other end of the two-row portion. The air conditioner according to claim 3, further comprising a connecting portion that communicates with the air conditioner. 5. A connecting portion communicating with one end of each of the refrigerant pipes of the two-row portion is provided at both ends of the one-row portion, and the refrigerant pipes are connected to each other at the other end of the two-row portion. The air conditioner according to claim 3, further comprising a pipe connection portion connected to the valve by a pipe. 6. The air conditioner according to claim 4, wherein a crossing portion for exchanging the refrigerant pipes on the leeward side and the leeward side is provided at a central portion of each of the two rows. 7. The air conditioner according to claim 1, wherein the refrigerant pipes are arranged so that the one row portion has one pass and the two row portions have two passes. 8. The air conditioner according to claim 7, wherein a pipe connection portion connected to the throttle device by a pipe is provided at one end of the one row portion. 9. A pipe connecting portion for connecting each refrigerant pipe to the four-way valve at each of the notched one ends of the two-row portion, and each of the two-row portions not cut and one of the one-row portions. A connecting portion communicating with the other end of the portion;
9. The air conditioner according to claim 8, wherein a connecting portion for connecting the refrigerant pipes to each other is provided at the other end of the row portion. 10. A pipe connecting portion for connecting a refrigerant pipe to the four-way valve at each one end of the two-row portion which is not cut, and a cut-out end of the two-row portion and the one row are provided. 9. The air conditioner according to claim 8, wherein a connecting portion communicating with the other end of the portion is provided, and a connecting portion communicating the refrigerant pipes with each other is provided at the other end of the two-row portion.