JPH08159615A - Refrigerant distribution structure of refrigeration cycle - Google Patents

Abstract

PURPOSE: To provide a refrigerant distribution structure of a new refrigeration cycle which is capable distributing refrigerant in a constant and stable manner without being affected by refrigerant properties or molding variability of a distributor or slanted piping or the like. CONSTITUTION: In a refrigerant distribution structure of a refrigeration cycle which comprises a flow inlet 9 which lets refrigerant to flow in and a distributor 8 provided with a plurality of flow outlets 10 opposed to the flow inlet 9 and connects an inlet pipeline 13 and outlet pipelines 14 and 15 to the flow inlet 9 and the flow outlets 10 respectively, taper-shaped throttling parts 13a, 14a and 15a are formed on connection ends of the inlet pipeline 13 and the outlet pipelines 14 and 15. The throttling parts 13a, 14a and 15a are projected in the distributor 8 from the flow inlet pipeline 9 and the flow outlet pipeline 10 and connected thereto.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigeration cycle used in an air conditioner, and more particularly to a refrigerant distribution structure for branching and flowing a refrigerant flowing to the evaporator side.

[0002]

2. Description of the Related Art FIG. 3 shows a basic structure of a refrigeration cycle used in an air conditioner. As shown in the figure, this refrigeration cycle has a compressor 1, a four-way valve 2, an indoor heat exchanger 3, an expansion valve 4, an outdoor heat exchanger 5, and a gas-liquid separator 6 connected in a loop by a refrigerant pipe. By circulating a refrigerant in this loop, the room is heated and cooled. That is, as shown by the solid line arrow in the figure, the gaseous refrigerant discharged from the compressor 1 and having a high pressure is sent to the outdoor heat exchanger 5 side by the four-way valve 2 where it is condensed and liquefied. While being decompressed by the expansion valve 4, it is sent to the indoor heat exchanger 3, where it absorbs the heat in the room, evaporates and vaporizes, and then is sent to the gas-liquid separator 6 via the four-way valve 2. Gas-liquid separation is performed, and a gaseous substance is sucked into the compressor 1, compressed again and sent out to perform a cooling operation, and the refrigerant is circulated in the opposite direction as indicated by a broken line arrow in the figure. Heating operation will be performed.

[0003]

By the way, as shown by a portion A in FIG. 3, the refrigerant inlet portion of the indoor heat exchanger 3 is
The flow distributor 8 is provided, and the refrigerant flowing in the loop is branched and allowed to flow into the indoor heat exchanger 3 to improve the heat exchange rate. That is, as shown in FIG. 4, this flow divider 8 has one refrigerant inlet 9 and two refrigerant outlets 1.
0 and 10 are formed in a Y shape so as to face each other, and a refrigerant inflow pipe 11 is connected to the refrigerant inflow port 9 and a refrigerant outflow port 10, 1
The refrigerant outlet pipes 12 and 12 are integrally connected to 0 at their tips, and the refrigerant flowing from the refrigerant inflow pipe 11 side is branched to the refrigerant outlet pipes 12 and 12 side.

However, since the refrigerant flowing through the flow divider 8 is a two-phase flow in which a liquid and a gas are mixed, it may flow unevenly, the molding variations of the flow divider, the inclination of the pipe to be connected, the arrangement position, etc. It was unstable because normal diversion was not performed according to the initial design value.

Therefore, the present invention has been devised to solve the above problems, and its purpose is always stable without being affected by the properties of the refrigerant, variations in molding of the flow divider, inclination of the pipe, and the like. Another object of the present invention is to provide a new refrigerant flow dividing structure for a refrigeration cycle capable of performing various flow divisions.

[0006]

In order to achieve the above object, the present invention provides a flow distributor having one inflow port for inflowing a refrigerant and a plurality of outflow ports so as to face the inflow port. In the refrigerant distribution structure of the refrigeration cycle in which the inlet pipe and the outlet pipe are connected to the outlet port and the outlet port, respectively, a tapered throttle portion is formed at the connection end portion of the inlet pipe and the outlet pipe, and the throttle portion is connected to the flow passage. It is connected so as to project into the flow divider from the inlet and the outlet.

The throttle portions of the outlet pipes are made to have different throttle amounts and projecting amounts, and the front end portions of the throttle portions of the inlet pipes are located between the throttle portions of the outlet pipes, and The diameter of the tip of the throttle portion is smaller than the distance between the throttle portions of the outlet pipe.

[0008]

As described above, according to the present invention, a tapered throttle portion is formed at the connecting end portion of the inlet pipe and the outlet pipe, and the throttle portion of the inlet pipe is located between the throttle portions of the outlet pipes. Since it is provided so as to project in the flow distributor, the refrigerant flowing from the inlet pipe into the flow distributor is agitated here and stays for a predetermined time, and then is branched to the outlet pipe side, so the refrigerant is in a two-phase flow state. It is possible to always perform the stable flow divergence as designed even if there is variation in molding of the flow diverter, inclination of the pipe, and the like. Further, the flow dividing ratio in the flow divider can be easily controlled only by changing the amount of protrusion and the diameter of the throttle portion.

[0009]

An embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 shows a flow dividing structure according to the present invention. Among them, a flow divider 8 used in the present embodiment is one pipe-like inlet 9 and a pipe-like inlet 9 which is opposed to the inlet 9 like the conventional one. Two pipe-shaped outlets 10 and 10
It is formed in a Y shape with and. Then, as shown in the figure, a tip portion of an inflow pipe 13 for inflowing the refrigerant into the flow distributor 8 is provided at the inflow port 9, and an outflow pipe 14, for distributing the refrigerant in the flow distributor 8 at the outflow ports 10, 10. The tips of 15 are respectively inserted and connected.

Further, these inflow pipe 13 and outflow pipe 1
Tapered throttle portions 13a, 14a and 15a are formed at the insertion end portions of the nozzles 4 and 15, respectively, and are narrowed so that the opening diameters at their tips are smaller than the respective pipe diameters. In addition, these throttle parts 13a, 14a, 1
5a is provided so as to protrude inward of the flow divider 8 from the respective inlets 9 and outlets 10 and the tip end on the throttle portion 13a side is located between the throttle portions 14a and 15a. Has been. And, further, this throttle portion 14a
The distance between the holes 15a and 15a is set to be sufficiently larger than the opening diameter of the throttle portion 13a.

By adopting such a branch structure, the refrigerant flowing from the inflow pipe 13 into the flow distributor 8 is divided into the narrowed portions 14a and 15a from the narrowed portion 13a of the inflow pipe 13 as shown by an arrow in the figure. After colliding with the shunt wall 8a once and flowing toward the squeezing portion 13a side along the squeezing portions 14a and 15a and the shunt inner wall, the outflow pipes 14 and 15 from the tip opening portions of the squeezing portions 14a and 15a, respectively. Shunted to the side. That is, the refrigerant that has flowed from the inflow pipe 13 into the flow distributor 8 is not directly split while maintaining its power as in the conventional case, but after being stirred in the flow distributor 8 and staying for a predetermined time, It will be divided into the outflow pipes 14 and 15 side. Therefore, even if the molding variation of the flow divider 8 or the inclination of the pipe or the refrigerant in the state of the two-phase flow in which the gas and the liquid are mixed flows, the stable flow division according to the original design plan can be easily performed. be able to.

Further, the narrowed portion 14 of the outflow pipes 14, 15
It is also possible to easily control the flow dividing ratio without changing the diameters of the outflow pipes 14 and 15 by making the protrusion amounts of the a and 15a different from each other and the throttle diameter to be different. For example, if the protrusion amount of the throttle portion 15a of the outflow pipe 15 is larger than that of the throttle portion 14a of the outflow pipe 14 not to mention the throttle diameter, it becomes difficult for the refrigerant to flow to the outflow pipe 15 side, and the outflow pipe 14 accordingly. Can be increased. Therefore, as shown in FIG. 2, two or more flow dividers 8 are used and one of the outflow pipes is also used as the inflow pipe, and the protrusion amount of the outflow pipe is
By adjusting the throttle diameter and the like, it is possible to easily perform multi-stage branch flow control, which was difficult with the conventional structure.

[0014]

In summary, according to the present invention, a stable diversion is always performed by a slight processing of the pipe without being affected by the characteristics of the refrigerant, the molding variation of the flow divider, the inclination of the pipe, and the like. It has an excellent effect such as being able to.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an embodiment of the present invention.

FIG. 2 is a vertical sectional view showing a modified embodiment of the present invention.

FIG. 3 is a configuration diagram showing a conventional refrigeration cycle.

FIG. 4 is a vertical cross-sectional view showing a conventional flow dividing structure.

[Explanation of symbols]

 8 Flow divider 9 Inlet 10 Outlet 13 Inflow pipe 14,15 Outflow pipe 13a, 14a, 15a Throttling part

Claims (4)

[Claims] 1. An inlet pipe and an outlet pipe are respectively inserted and connected to a flow divider having one inflow port for inflowing a refrigerant and a plurality of outflow ports at positions opposite to the inflow port. In the refrigerant distribution structure of the refrigeration cycle consisting of, a tapered throttle portion is formed at the insertion end of the inlet pipe and the outlet pipe, and the throttle portion is connected so as to project from the inlet and the outlet into the flow distributor. A refrigerating cycle refrigerant flow dividing structure. 2. The refrigerant distribution structure of the refrigeration cycle according to claim 1, wherein the throttle portions of the outlet pipes have different throttle amounts. 3. The refrigerant distribution structure for a refrigeration cycle according to claim 1, wherein the projections of the throttle portions of the outlet pipes are different from each other. 4. The throttle pipe tip of the inlet pipe is located between the throttle pipes of the outlet pipes, and the diameter of the throttle pipe tip is smaller than the distance between the throttle pipes of the outlet pipe. The refrigerant distribution structure of the refrigeration cycle according to claim 1.