JP2006118821A - Flow distributing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent the deviation of refrigerant flow rate in a case that refrigerant of two-layer state flows into a refrigerant flow distributing device. <P>SOLUTION: As a pipe to be connected to a distributer 31, an inflow pipe 33 having a substantially circular and spiral shape with a diameter twice or more the pipe diameter is used. According to this, when the refrigerant of two-layer state is passed therein, since the refrigerant of liquid phase with a high density is greatly influenced by centrifugal force, compared with that with a small density, generating a radial flow, its mixing with the gas phase can be promoted in an orifice part 31a provided within the distributor 31. Accordingly, the difference in the refrigerant mass per unit time carried to an outflow pipe can be significantly reduced regardless of the shape of inner wall of the inflow pipe. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a flow dividing device.

Conventionally, when a refrigerant in a two-layer state flows into the refrigerant diverter, the liquid-phase refrigerant having a high density is more difficult to obtain due to centrifugal force Since it flows along the wall surface of the biased part greatly influenced by gravity, the amount of heat exchanged by the heat exchanger is reduced by increasing the mass of refrigerant per unit time in some outflow pipes. In order to prevent this, a protrusion is provided on the inner wall of the distributor inflow pipe to inhibit liquid refrigerant flowing through the wall surface, thereby preventing refrigerant drift in the heat exchanger against changes in the refrigerant flow rate (for example, patents). Reference 1).
FIG. 6 shows a conventional refrigerant branching device described in Patent Document 1. In FIG. As shown in FIG. 6, an inflow pipe 32 through which the refrigerant flows into the distributor 31 is connected to a distributor 31 that distributes the refrigerant to a heat exchanger having a plurality of refrigerant paths, and the distributor 31 has a heat exchanger. An outflow pipe 32 for distributing the refrigerant is connected.
JP 2000-105026 A

  However, in the conventional configuration, since the inflow pipe connected to the distributor is grooved, not only the processing cost per pipe is increased, but also when the average wall thickness is the same as the smooth pipe, Since the thickness of the concave portion is reduced, there is a problem that durability such as strength and corrosion of the piping is lowered.

  The present invention solves the above-described conventional problems, and an object thereof is to provide a flow dividing device that has durability equivalent to that of a smooth tube and can simultaneously prevent refrigerant drift against refrigerant flow rate changes.

  In order to solve the above-described conventional problems, in the flow dividing device of the present invention, the pipe connected to the distributor has a spiral shape, and the diameter of the spiral is twice or more the pipe diameter.

  As a result, the liquid phase refrigerant having a high density of the two-layer refrigerant is more greatly affected by the centrifugal force than the low density refrigerant, so that a radial flow is generated. Therefore, the mixing with the gas phase can be promoted, so that the difference in refrigerant mass per unit time flowing through the outflow pipe can be greatly reduced regardless of the shape of the inner wall of the inflow pipe.

  Further, the flow dividing device of the present invention is provided with a distributor inflow pipe connected to the distributor, the distributor inflow pipe is made smaller in diameter than other pipes, and this part is from the distributor up to 5 times the pipe diameter of the connection pipe. This configuration makes it easier for the liquid refrigerant flowing on the wall surface to flow into the central part by contracting the refrigerant, so that the liquid and gas are mixed and flowed into the distributor. Therefore, regardless of the shape of the inner wall of the inflow pipe, the difference in refrigerant mass per unit time flowing through the outflow pipe can be greatly reduced.

Further, the flow dividing device of the present invention uses a contraction pipe for the distributor inflow pipe. By making this configuration, the refrigerant contracts and expands to cause turbulence in the pipe, and flows on the wall surface. Since the refrigerant easily flows to the central portion, the difference in mass of the refrigerant per unit time flowing to the outflow pipe can be greatly reduced regardless of the shape of the inner wall of the inflow pipe.

  Further, the flow dividing device of the present invention is provided with a resonance means for exciting the refrigerant in the pipe immediately before the refrigerant flows into the distributor. By making this configuration, the refrigerant can be excited. Therefore, the difference in the mass of the refrigerant per unit time flowing through the outflow pipe can be greatly reduced regardless of the shape of the inner wall of the inflow pipe.

  In addition, since the diversion device of the present invention has a shape in which the aspect ratio of the cross section perpendicular to the refrigerant flow direction of the resonance means does not become 1, the refrigerant vibrated by the resonance means is strongly vibrated in a specific direction. The ability to form a corrugated waveform not only enables high-level mixing of liquid refrigerant and gas refrigerant flowing on the wall surface, but also makes it less susceptible to centrifugal force and gravity due to the shape of the connecting pipe. Regardless of the shape, not only can the difference in refrigerant mass per unit time flowing through the outflow pipe be greatly reduced, but the degree of freedom of installation of the flow dividing device is increased.

  Further, the shunting device of the present invention can maintain the state of the mixed liquid refrigerant and gas refrigerant by providing the resonance means within a distance from the distributor up to 5 times the pipe diameter of the connection pipe. Regardless of the shape of the inner wall, the refrigerant mass difference per unit time flowing through the outflow pipe can be greatly reduced.

  The refrigerant branching device of the present invention has the function of inhibiting the liquid refrigerant flowing from the inflow pipe to the distributor wall surface, so that the flow rate deviation of the refrigerant flowing through the outflow pipe connected to the inlet side of the heat exchanger having a plurality of refrigerant paths is reduced. Can be greatly reduced.

  In the first aspect of the present invention, the pipe connected to the distributor is spiraled with a substantially arc having a diameter of at least twice the pipe diameter. Compared to the case of a small state, the flow in the radial direction is greatly influenced by the centrifugal force. Therefore, in the case of the same circulation amount and the same pipe length, the refrigerant flow rate becomes longer by increasing the refrigerant flow path length. As the flow rate rises, not only can the mixing of the liquid and gas layers be expected in the inflow pipe, but also the speed when flowing into the orifice in the distributor can be expected to increase mixing between the liquid layer and the gas phase. Therefore, regardless of the shape of the inner wall of the inflow pipe, the difference in refrigerant mass per unit time flowing through the outflow pipe can be greatly reduced.

  In the second aspect of the present invention, when a two-layer refrigerant flows, a distributor inflow pipe whose pipe diameter immediately before flowing into the distributor is smaller than other inflow pipe diameters is 5 times the pipe diameter of the connecting pipe from the distributor. By providing within the distance, the liquid refrigerant flowing on the wall surface is easily flown to the central part due to the refrigerant being contracted, so that the liquid and gas are mixed and flowed into the distributor. Regardless of the shape, the difference in mass of refrigerant per unit time flowing through the outflow pipe can be greatly reduced.

  According to a third aspect of the present invention, when a refrigerant in a two-layer state flows, a distributor contraction pipe obtained by reducing the pipe immediately before flowing into the distributor is provided within a distance of 5 times the pipe diameter of the connection pipe from the distributor. Therefore, the refrigerant contracts and expands to cause turbulence in the pipe, so that the liquid refrigerant flowing on the wall easily flows to the center portion, so that it flows to the outflow pipe regardless of the shape of the inner wall of the inflow pipe. The difference in refrigerant mass per unit time can be greatly reduced.

According to the fourth aspect of the present invention, when the refrigerant in the two-layer state flows, the liquid refrigerant flowing on the wall surface can be vibrated by providing the resonance means for exciting the refrigerant in the pipe immediately before the refrigerant flows into the distributor. Therefore, the difference in the mass of the refrigerant per unit time flowing through the outflow pipe can be greatly reduced regardless of the shape of the inner wall of the inflow pipe.

  In the fifth aspect of the present invention, when the refrigerant in the two-layer state flows, the aspect ratio of the cross section perpendicular to the refrigerant flow direction of the resonance means does not become 1, so the refrigerant vibrated by the resonance means is The ability to form a waveform that is strongly vibrated in a specific direction enables mixing of liquid refrigerant and gas refrigerant flowing on the wall surface at a high level, and is less susceptible to centrifugal force and gravity due to the shape of the connecting pipe. Therefore, regardless of the shape of the inner wall of the inflow pipe, not only can the difference in refrigerant mass per unit time flowing through the outflow pipe be greatly reduced, but the degree of freedom in installing the flow dividing device is increased.

  In a sixth aspect of the present invention, when the two-layer refrigerant flows, the resonance means is provided within a distance from the distributor to five times the pipe diameter of the connection pipe, so that the mixed liquid refrigerant and gas refrigerant are mixed. Since the state can be maintained, the difference in refrigerant mass per unit time flowing through the outflow pipe can be greatly reduced regardless of the shape of the inner wall of the inflow pipe.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a schematic cross-sectional view of a refrigerant flow dividing device according to a first embodiment of the present invention.

  In FIG. 1, a distributor 31 that distributes the refrigerant to a heat exchanger having a plurality of refrigerant paths, an orifice portion 31 a provided with a constriction portion for reducing the flow of the refrigerant inside the distributor 31, and the distributor 31. The distributor 31 includes an inflow pipe 32 and the distributor 31 includes an outflow pipe 32 for distributing the heat exchanger refrigerant.

  About the refrigerant | coolant diversion apparatus comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  First, the refrigerant in the two-layer state condensed by the condenser is a liquid-phase refrigerant having a high density due to the shape of the substantially circular arc having a diameter D that is twice or more the pipe diameter d and entering the spiral shaped inflow pipe 32. Compared with the low density state, the flow in the radial direction is greatly influenced by the centrifugal force. By increasing the flow velocity, not only can the liquid layer and the gas layer be mixed in the inflow pipe, but also the speed when flowing into the orifice part 31a in the distributor 31 can be expected to increase. Since mixing with the gas phase can be promoted, the difference in refrigerant mass per unit time flowing through the outflow pipe 32 can be greatly reduced regardless of the shape of the inner wall of the inflow pipe.

(Embodiment 2)
FIG. 2 shows a refrigerant branching device according to the second embodiment of the present invention.

  2, the distributor inflow pipe 42 is configured to be smaller than the pipe diameter d1 of the inflow pipe 32 connecting the pipe diameter d2 of the pipe immediately before flowing into the distributor 31.

  About the refrigerant | coolant diversion apparatus comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

First, when the refrigerant in the two-layer state condensed by the condenser flows into the flow dividing device, the distributor inflow is made smaller than the pipe diameter d1 of the inflow pipe 32 connecting the pipe diameter d2 of the pipe just before flowing into the distributor 31. The pipe 42 not only contracts the refrigerant but also hinders the flow of the liquid refrigerant that has passed through the wall surface, and it tends to flow toward the center by directing it toward the center of the pipe, so that the liquid and gas are mixed to the distributor. Since the refrigerant flows in, the refrigerant mass difference per unit time flowing through the outflow pipe can be greatly reduced regardless of the shape of the inner wall of the inflow pipe. Further, since the installation position of the distributor inflow pipe 42 is within a distance up to five times the diameter of the distributor inflow pipe 42, the effect of mixing the liquid and the gas can be maintained to some extent.

(Embodiment 3)
FIG. 3 shows a refrigerant branching device according to a third embodiment of the present invention.

  In FIG. 3, the distributor is configured by a distributor contracted tube 52 in which a pipe immediately before flowing into the distributor 31 is contracted.

  About the refrigerant | coolant diversion apparatus comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  First, when the refrigerant in the two-layer state condensed by the condenser flows into the flow dividing device, the refrigerant is contracted and expanded by the distributor contracted tube 52 in which the piping immediately before flowing into the distributor 31 is contracted. Therefore, the difference in the mass of refrigerant per unit time flowing to the outflow pipe regardless of the shape of the inner wall of the inflow pipe Can be greatly reduced.

  Further, by providing within a distance L from the distributor up to 5 times the pipe diameter d2 of the connection pipe, the effect of mixing the liquid and gas can be maintained to some extent.

(Embodiment 4)
FIG. 4 shows a refrigerant branching device in the fourth embodiment of the present invention.

  In FIG. 4, the piping just before flowing into the distributor is constituted by the resonance means 61.

  About the refrigerant | coolant diversion apparatus comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  First, when the two-layer refrigerant condensed in the condenser flows into the flow dividing device, the refrigerant is excited by providing the resonance means 61 for exciting the refrigerant in the pipe immediately before the refrigerant flows into the distributor 31. Therefore, since mixing of the liquid refrigerant and the gas refrigerant flowing on the wall surface is possible at a high level, the difference in mass of refrigerant per unit time flowing in the outflow pipe can be greatly reduced regardless of the shape of the inner wall of the inflow pipe.

(Embodiment 5)
FIG. 5 shows a refrigerant branching device according to the fifth embodiment of the present invention.

  In FIG. 5, the pipe immediately before flowing into the distributor is constituted by a resonance means 71 having a shape in which the aspect ratio d3 / d4 does not become 1.

  About the refrigerant | coolant diversion apparatus comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

First, when the two-layer refrigerant condensed by the condenser flows into the flow dividing device, the refrigerant is vibrated by the resonance means 71 having a shape in which the aspect ratio of the cross section perpendicular to the refrigerant flow direction is not 1. Since the refrigerant can form a waveform that is strongly vibrated in a specific direction, mixing of liquid refrigerant and gas refrigerant flowing on the wall surface is not only possible at a high level, but also the influence of centrifugal force and gravity due to the shape of the connecting pipe. Since it becomes hard to receive, not only the shape of the inner wall of the inflow pipe, but also the difference in refrigerant mass per unit time flowing to the outflow pipe can be greatly reduced, and the degree of freedom in installing the flow dividing device is increased.

  As described above, the flow dividing device according to the present invention has a function of hindering the fluid flowing from the inlet pipe to the wall surface of the distributor, so that the flow rate deviation can be greatly reduced. For example, the present invention can be applied to a diversion device such as water, water vapor, and brine.

1 is a schematic cross-sectional view of a refrigerant distribution device in Embodiment 1 of the present invention. Schematic cross-sectional view of a refrigerant distribution device in Embodiment 2 of the present invention Schematic cross-sectional view of a refrigerant distribution device in Embodiment 3 of the present invention Schematic cross-sectional view of a refrigerant distribution device in Embodiment 4 of the present invention Schematic cross-sectional view of a refrigerant distribution device in Embodiment 5 of the present invention Schematic cross-sectional view of a conventional refrigerant distribution device

Explanation of symbols

31 Distributor 32 Inflow pipe 33 Outflow pipe 42 Distributor inflow pipe 52 Distributor contraction pipe 61 Resonance means 71 Resonance means

Claims (6)

In a refrigeration circuit unit having a compressor, a multi-pass heat exchanger having a plurality of refrigerant paths, a distributor disposed on the heat exchanger inlet side, and a heat exchange fan of the heat exchanger, A pipe for connecting to a distributor has a spiral shape, and the diameter of the spiral is twice or more the pipe diameter. In a refrigeration circuit unit having a compressor, a multi-pass heat exchanger having a plurality of refrigerant paths, a distributor disposed on the heat exchanger inlet side, and a heat exchange fan of the heat exchanger, Distributor inflow pipe connected to the distributor is provided, the distributor inflow pipe is smaller in diameter than other pipes, and this part is provided within a distance of 5 times the pipe diameter of the connection pipe from the distributor. A diverter characterized by. The flow dividing device according to claim 2, wherein the distributor inflow pipe is a contraction pipe. In a refrigeration circuit unit having a compressor, a multi-pass heat exchanger having a plurality of refrigerant paths, a distributor disposed on the inlet side of the heat exchanger, and a heat exchange fan of the heat exchanger, A shunting device comprising a resonance means for exciting a refrigerant in a pipe immediately before the refrigerant flows into the distributor. 5. The refrigerant distribution device for a refrigeration cycle according to claim 4, wherein the aspect ratio of the cross section in the direction perpendicular to the refrigerant flow direction of the resonance means is not 1. 6. The flow dividing device according to claim 4, wherein the resonance means is provided within a distance from the distributor up to five times the pipe diameter of the connection pipe.

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