JPH01247973A - Air-conditioning machine - Google Patents

Abstract

PURPOSE:To branch hot gas in accordance with the flow rate of air of an outdoor fan upon room heating operation and make it flow through an outdoor side heat exchanger uniformly upon defrosting operation, by a method wherein the flow resistance of circulating refrigerant, which flows from the inlet port of the circulating refrigerant into the large flow rate area of the outdoor side heat exchanger, is made smaller than the flow resistance of the circulating refrigerant, which flows into the small flow rate area of the same heat exchanger. CONSTITUTION:The flow resistance of circulating refrigerant of a small-diametral pipe 22, connected to the upper meandering pipe 12 of an outdoor side heat exchanger 3, is big while the flow resistance of the circulating refrigerant in a large-diametral pipe 23, connected to the lower meandering pipe 14, is small, therefore, big amount of the refrigerant flows through the meandering pipe 14 and small amount of refrigerant flows through the meandering pipe 12. However, hot gas, which flows from the inlet port 27 of the hot gas into a flow distributor 21, is branched on the half way of the small-diametral pipe 22, therefore, it is distributed uniformly and it flows into the upper meandering pipe 12 and the lower meandering pipe 14 of the outdoor side heat exchanger 3.

Description

[Detailed Description of the Invention] [Objective of the Invention] (Industrial Application Field) This invention provides a flow divider in the outdoor heat exchanger, and distributes circulating refrigerant and defrosting hot gas to the outdoor heat exchanger. This invention relates to an air conditioner that allows air flow to be divided into upper and lower levels.

(Prior Art) A refrigeration cycle of a heat pump type air conditioner is generally configured as shown in FIG. That is, 1 is a compressor, and its discharge side is connected to an outdoor heat exchanger 3 via a four-way valve 2.
It is connected to the. This outdoor heat exchanger 3 is a pressure reducing device 4
The indoor heat exchanger 5 is connected to the suction side of the compressor 1 via the four-way valve 2. By switching the four-way valve 2, the refrigerant circulates as shown by the solid arrow during cooling operation.
During heating operation, the refrigerant circulates as shown by the dashed arrow. Furthermore, the discharge side of the compressor 1 is connected to the refrigerant inlet side of the outdoor heat exchanger 3 during heating through a bypass pipe 7 having an on-off valve 6 in the middle, It is designed to allow hot gas to flow during frost.

Therefore, as shown in FIG. 7, a flow divider 8 is provided on the refrigerant inlet side of the outdoor heat exchanger 3 during heating.
This flow divider 8 has a common inlet 1 for circulating refrigerant and hot gas.
0 is set. Furthermore, one branch outlet 11 of the flow divider 8 is connected to the upper meandering vibe 12 of the outdoor heat exchanger 3.
The other branch outlet 13 is connected to the lower meandering vibes 14 of the outdoor heat exchanger 3, so that the circulating refrigerant and hot gas can be divided into the upper and lower parts of the outdoor heat exchanger 3.

However, an air conditioner equipped with electrical components 15 such as an inverter control device to vary the capacity of the compressor 1,
In order to prevent the electrical component 15 from heating, the electrical component 1
5 is provided facing the outdoor heat exchanger 3.
Moreover, it is installed at a position offset above the outdoor heat exchanger 3. Therefore, the electrical component 15 becomes the ventilation resistance of the outdoor fan 16, and the upper part of the outdoor heat exchanger 3 facing the electrical component 15 becomes a small air volume region 3a.
The lower region not facing the electrical component 15 becomes a large air volume region 3b. In other words, there is a large difference in the air volume from the outdoor fan 16 between the upper and lower parts of the outdoor heat exchanger 3, but the
Because the whole is formed by a vibrator of the same diameter,
The refrigerant evenly flows through the upper meandering vibrator 12 and the lower meandering vibrator 14.

(Problem 8 to be Solved by the Invention) As described above, the flow divider 8 to the outdoor heat exchanger 3 of the conventional air conditioner simply diverts the circulating refrigerant and hot gas to the outdoor heat exchanger 3. Since the hot gas flows into the upper and lower parts of the air, the same divided flow is used both during normal heating operation and when defrosting by circulating hot gas, resulting in a problem of poor heat exchange efficiency.

This invention was made with attention to the above-mentioned circumstances, and its purpose is to divide the flow of hot gas according to the air volume of the outdoor fan during normal heating operation, and to distribute hot gas evenly to the outdoor heat exchanger during defrosting. Our goal is to provide an air conditioner that can distribute

[Structure of the invention]

(Means and effects for solving communication problems) The present invention provides an air conditioner in which an outdoor heat exchanger is provided with a large air volume area and a small air volume area by an outdoor fan. In addition to providing a circulating refrigerant inlet and a hot gas inlet in the flow divider, the flow resistance of the circulating refrigerant from the circulating refrigerant inlet to the large air volume region of the outdoor heat exchanger is made smaller than the circulating refrigerant flow resistance toward the small air volume region. The refrigerant flow rate is increased in areas where the air volume is large, and the refrigerant flow rate is divided into areas where the air volume is small. Furthermore, the hot gas flowing from the hot gas inlet to the outdoor heat exchanger is distributed evenly throughout the outdoor heat exchanger to defrost the air.

(Embodiment) Hereinafter, an embodiment of the present invention will be described based on the drawings, and the same components as those in the conventional art will be given the same numbers and the explanation will be omitted.

In FIG. 1, reference numeral 21 denotes a flow divider, which basically consists of a small-diameter vibrator 22 bent in an inverted U-shape and a large-diameter vibrator 23 bent in an O-shape. and,
One end of the small diameter vibe 22 is connected to one end of the large diameter vibe 23 via a joint pipe 24, and the other end of the small diameter vibe 22 is connected to the upper part of the outdoor heat exchanger 3 via a refrigerant inlet 25. It is connected to the meandering vibrator 12. The other end of the large-diameter vibrator 23 is connected to the lower meandering vibrator 14 of the outdoor heat exchanger 3 via a refrigerant inlet 26 . Furthermore, a hot gas population 2 is provided in the middle of the small diameter vibrator 22.
7, a circulating refrigerant port 28 is provided in the middle of the joint pipe 24.

Therefore, the upper meandering vibe 12 of the outdoor heat exchanger 3
The small-diameter vibrator 22 connected to the refrigerant has a large resistance to circulation,
The large-diameter pipe 23 connected to the lower meandering vibrator 14 has a small circulating refrigerant flow resistance, and the circulating refrigerant flowing into the flow divider 21 from the circulating refrigerant population 28 passes through the joint pipe 24 to the small-diameter vibrator 22 and the large-diameter pipe. A large amount of refrigerant flows to the lower meandering vibrator 14 of the outdoor heat exchanger 3 through the large-diameter vibrator 23 with low flow resistance, and conversely flows through the small-diameter vibrator 22 with high flow resistance. A small amount of refrigerant flows into the meandering vibe 12 above the outdoor heat exchanger 3. However, since the hot gas flowing into the flow divider 21 from the hot gas population 27 is diverted from the middle part of the small-diameter vibrator 22, it is evenly distributed to the upper meandering vibrator 12 of the outdoor heat exchanger 3.
and flows into the lower meandering vibrator 14.

Therefore, during normal heating operation, the refrigerant circulates as shown by the broken line arrow in FIG.
is turned on and air is blown toward the outdoor heat exchanger 3, but
In order to vary the capacity of the compressor 1, an electrical component 15 such as an inverter control device is installed between an outdoor fan 16 provided opposite to the outdoor heat exchanger 3, and moreover, located above the outdoor heat exchanger 3. It is installed in the correct position. Therefore, the electrical component 15 acts as ventilation resistance for the outdoor fan 16, the upper part of the outdoor heat exchanger 3 facing the electrical component 15 becomes a small air volume region 3a, and the lower part not facing the electrical component 15 becomes a large air volume region 3b. ing. Therefore, a small amount of refrigerant flows from the small diameter vibrator 22 into the small air volume area 3a, and a small amount of refrigerant flows into the large air volume area 3a.
A large amount of refrigerant flows from the large-diameter vibe 23 to b. Therefore, a refrigerant suitable for the air volume is circulated through the outdoor heat exchanger 3. Furthermore, during defrosting, the outdoor fan 16 is turned off and the on-off valve 6 is opened. Therefore, the hot gas discharged from the compressor 1 flows into the flow divider 21 from the hot gas port 27 of the flow divider 21 via the bypass pipe 7 . Then, it is evenly distributed by the small-diameter vibrator 22 and flows to the upper and lower meandering vibrators 12 and 14 of the outdoor heat exchanger 3 for defrosting, thereby uniformly defrosting the entire outdoor heat exchanger 3. be able to.

In the above embodiment, the flow divider 21 is formed by the small-diameter vibrator 22 and the large-diameter vibrator 23 to adjust the circulating refrigerant flow resistance, but the present invention is not limited to this, and as shown in FIG. Even if the vibrator 21a has the same diameter, the upper and lower meandering vibrators 12.
The length of the passage up to 14 can be changed, and as a result, the refrigerant flow resistance can be adjusted.

Further, in FIG. 1, the flow divider 21 is formed by an inverted U-shaped small-diameter vibrator 22 and a U-shaped large-diameter vibrator 23, but the present invention is not limited to this, and it may be configured as shown in FIG. 3. Distribution can also be performed in the same manner as in the previous embodiment. That is, a hot gas inlet 30 is provided at the bent portion 29 of the U-shaped small diameter vibe 28, and one end of this small diameter vibe 28 is connected to a refrigerant inlet 31 that connects to the upper meandering vibe 12.
The other end is connected via a joint pipe 33 having a circulating refrigerant port 32 to a refrigerant inlet 34 that connects to the lower meandering vibe 14 . In each of the embodiments described above, the flow dividing ratio is adjusted by changing the diameter of the vibrator, but the shape of the vibrator may also be changed.

Further, in the above embodiment, one pressure reducing device 4 was provided between the outdoor heat exchanger 3 and the indoor heat exchanger 5, but
As shown in FIG. 4, the outdoor pressure reducing device 35 and the indoor pressure reducing device 36 may be provided separately. With this configuration, during cooling operation, as shown in the Mollier diagram of FIG. 5, the outdoor pressure reducing device 35 causes the stroke b1, and the indoor pressure reducing device 36 causes the stroke b2.

That is, in the connecting piping section, the e-stroke occurs, and the state of the refrigerant is close to that under equal pressure, and if the refrigerant temperature at the start of the e-stroke is high, heat can be dissipated even in the e-stroke. Moreover, even if the refrigerant temperature is lower than the outside air at the start of the e-stroke, the refrigerant temperature is sufficiently high, so heat loss due to heat radiation is reduced. Therefore, in addition to increasing the capacity, the decompression device was divided into two parts.
Since the amount of pressure reduction per unit can be reduced, the generation of refrigerant noise is reduced.

〔Effect of the invention〕

As explained above, according to the present invention, during normal heating operation, the refrigerant can be divided according to the large air volume region and the small air volume region of the outdoor heat exchanger, and during defrosting, the refrigerant can be distributed throughout the outdoor heat exchanger. It has the effect of uniform defrosting by distributing hot gas.

[Brief explanation of the drawing]

FIG. 1 is a front view of a flow divider showing one embodiment of this invention, FIG. 2 is a front view of an outdoor heat exchanger showing another embodiment of this invention, and FIG. 3 is a front view of a flow divider of this invention. A front view showing another embodiment, Fig. 4 is a system diagram showing another embodiment of the refrigeration cycle, Fig. 5 is a Mollier diagram, Fig. 6 is a system diagram of a conventional refrigeration cycle, and Fig. 7 is a conventional refrigeration cycle. FIG. 3 is a front view of the outdoor heat exchanger of FIG. DESCRIPTION OF SYMBOLS 1... Compressor, 2... Four-way valve, 3... Outdoor heat exchanger, 4... Pressure reduction device, 5... Indoor heat exchanger, 6
...Opening/closing valve, 7...Bypass pipe, 8...Flow divider,
3a... Large air volume area, 3b... Small air volume area, 21.
... Flow divider, 27... Hot gas inlet, 28... Circulating refrigerant inlet. Applicant's agent Patent attorney Takehiko Suzue Figure 4 Figure 5 Figure 6

Claims (1)

[Claims] A refrigeration cycle is constructed by sequentially connecting a compressor, a four-way valve, an indoor heat exchanger, a pressure reducing device, and an outdoor heat exchanger having a flow divider through refrigerant pipes, and has an on-off valve on the discharge side of the compressor. The air conditioner is connected to a flow divider of the outdoor heat exchanger via a bypass pipe, and is configured to flow hot gas to the outdoor heat exchanger for defrosting, the air conditioner being connected to a flow divider of the outdoor heat exchanger, the air conditioner being able to defrost the outdoor heat exchanger by supplying heating to the outdoor heat exchanger. In the air conditioner, an outdoor fan is provided that is turned on during operation and turned off during defrosting operation, and the outdoor heat exchanger is formed with a large air volume region and a small air volume region by the outdoor fan, the flow divider A circulating refrigerant inlet and a hot gas inlet are provided in the hot gas inlet, and the flow resistance of the circulating refrigerant from the circulating refrigerant inlet to the large air volume region of the outdoor heat exchanger is made smaller than the circulating refrigerant flow resistance toward the small air volume region. An air conditioner characterized in that hot gas flowing from the room to the outdoor heat exchanger is distributed evenly throughout the outdoor heat exchanger.