JP4560939B2 - Refrigerant shunt and air conditioner using the same - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a refrigerant flow divider that diverts refrigerant flowing in from an inflow pipe to a plurality of flow dividing passages, and an air conditioner using the refrigerant flow divider.
[0002]
[Prior art]
Conventionally, some air conditioners include a refrigerant circuit configured by connecting a compressor, an outdoor heat exchanger, an expansion valve, and an indoor heat exchanger in an annular shape. The outdoor heat exchanger and the indoor heat exchanger of this air conditioner distribute the refrigerant to a plurality of paths using a refrigerant flow divider and a branch pipe in order to reduce pressure loss. In such an air conditioner, there are few refrigerant drifts in an evaporator (indoor heat exchanger or outdoor heat exchanger) having a plurality of paths and low pressure loss in dry operation, cooling operation, and heating operation for temperature control. A refrigerant shunt is indispensable.
[0003]
[Problems to be solved by the invention]
However, in the air conditioner described above, if an attempt is made to reduce refrigerant drift by placing importance on the flow dividing performance of the refrigerant flow divider, pressure loss and noise increase, while conversely, if an attempt is made to reduce the pressure loss of the refrigerant flow divider, There is a problem that refrigerant drift tends to increase due to fluctuations in the degree of dryness and refrigerant flow rate, and the operating capacity decreases.
[0004]
Accordingly, an object of the present invention is to reduce the refrigerant drift with low loss and low noise with a simple configuration, and to provide a refrigerant flow divider capable of arbitrarily setting the refrigerant distribution ratio and a highly efficient and low noise air conditioner using the refrigerant flow divider. Is to provide a machine.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, an air conditioner according to claim 1 comprises:
In the refrigerant flow divider that diverts the refrigerant flowing in from the inflow pipe to the plurality of diversion passages,
A branch space for distributing the refrigerant flowing in from the inflow pipe to the plurality of branch passages;
An inflow side throttle portion provided between the inflow pipe and the branch space;
A collision wall provided so that the refrigerant flowing in from the inflow side throttle portion collides in the branch space;
The flow rate of refrigerant flowing into the inflow pipe is G [kg / s], the height in the direction in which the refrigerant flows in the branch space is H [m], the inner diameter of the inflow pipe is Di [mm], and the inflow side When the inner diameter of the throttle is D0 [mm]
G / H> 3
Di / D0 <2
Together to satisfy the conditions,
A diversion-side throttle portion is provided between the branch space and the plurality of diversion passages,
When the inner diameter of the diversion-side restricting portion is Dn and the number of the diversion passages is n,
Dn> Di / n
Satisfy the conditions of
The diversion-side restricting portion is disposed in the circumferential direction around the axis of the inflow pipe,
The minimum radius Dw centered on the axis of the inflow pipe in the inner region surrounded by the diversion-side restricting portion is larger than the inner diameter D0 of the inflow-side restricting portion .
[0006]
According to the refrigerant flow divider of the first aspect, the refrigerant that has flowed from the inflow pipe collides with the collision wall in the branch space after the flow velocity increases through the inflow side constricted portion, and is agitated. To be mixed. And the refrigerant | coolant mixed uniformly in the said branch space is divided into a some branch path. At this time, the refrigerant flow rate G flowing into the inflow pipe and the height H in the direction in which the refrigerant flows in the branch space are set so as to satisfy the condition of G / H> 3. By setting the inner diameter Di and the inner diameter D0 of the inflow side throttle portion so as to satisfy the condition of Di / D0 <2, it is possible to prevent an increase in pressure loss. Therefore, it is possible to realize a refrigerant flow divider that can reduce refrigerant drift with low loss and low noise with a simple configuration.
In addition, the refrigerant distribution ratio can be arbitrarily set by appropriately setting the inner diameter Dn of the diversion-side restricting portion provided between the branch space and the plurality of diversion passages. In addition, by setting the inner diameter of each diversion-side restricting portion so as to satisfy Dn> Di / n, the diversion-side restricting portion is not excessively restricted to increase the pressure loss, so that the refrigerant drift is not affected. Can be made into an aperture structure.
[0007]
A refrigerant flow divider according to claim 2 is the refrigerant flow divider according to claim 1, characterized in that a concave portion is provided in the collision wall.
[0008]
According to the refrigerant flow divider of the second aspect, the refrigerant that has flowed in from the inflow pipe through the inflow side restricting portion collides with the concave portion of the collision wall and is stirred by the concave portion provided in the collision wall. Mix evenly.
[0009]
[0010]
[0011]
Moreover, the air conditioner of Claim 3 is an air conditioner provided with the evaporator which has a some heat exchange part, The connection which connects the upstream and downstream heat exchange part of the said some heat exchange parts In this respect, the refrigerant flow divider according to claim 1 or 2 is arranged at a branch point where the refrigerant is divided into two or more heat exchange sections on the downstream side.
[0012]
According to the air conditioner of claim 3 , the connection point that connects the upstream side and the downstream side heat exchange unit among the plurality of heat exchange units, and the downstream side of the plurality of heat exchange units. At the branch point where the refrigerant is divided into two or more heat exchange parts, the refrigerant is in particular a gas-liquid two-phase flow. In the middle part of such an evaporator, the refrigerant drift can be reduced with low loss and low noise. By arranging the refrigerant flow divider, a highly efficient and low noise air conditioner can be realized.
[0013]
The air conditioner according to claim 4 is configured by connecting a compressor, an outdoor heat exchanger, a first pressure reducer, a first indoor heat exchanger, a second pressure reducer, and a second indoor heat exchanger in an annular shape. In the air conditioner provided with the refrigerant circuit, the second indoor heat exchanger includes a plurality of heat exchange units connected in parallel, and a branch point between the second decompressor and the second indoor heat exchanger. Further, the refrigerant distributor according to claim 1 or 2 is provided.
[0014]
According to the air conditioner of claim 4 , the first pressure reducer is fully opened and the second pressure reducer is throttled to obtain a compressor, an outdoor heat exchanger, a first pressure reducer, a first indoor heat exchanger, The refrigerant is circulated in the order of the second decompressor and the second indoor heat exchanger, the first indoor heat exchanger is used as a condenser for reheating, and the second indoor heat exchanger is used as an evaporator for dehumidification. Do the driving. In an air conditioner that performs such a dry operation, the refrigerant drifts with low loss and low noise at the branch point between the plurality of heat exchange units connected in parallel in the second indoor heat exchanger and the second pressure reducer. Since the refrigerant after being expanded by the second pressure reducer is diverted using the refrigerant diverter that can reduce the temperature, a highly efficient and low noise air conditioner can be realized.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a refrigerant flow divider of the present invention and an air conditioner using the refrigerant flow divider will be described in detail with reference to illustrated embodiments.
[0016]
FIG. 1 is a circuit diagram showing a configuration of an air conditioner using a refrigerant flow divider according to an embodiment of the present invention. 1 is a compressor, 2 is a four-way valve connected to the discharge side of the compressor 1 3 is an outdoor heat exchanger having one end connected to the four-way valve 2, 4 is a liquid receiver having one end connected to the other end of the outdoor heat exchanger 3, and 5 is the other end of the liquid receiver 4. 1 is an indoor heat exchanger in which one end is connected to the other end of the expansion valve 5 and the other end is connected to the suction side of the compressor 1 via the four-way valve 2. . The indoor heat exchanger 6 has three paths, and a refrigerant flow divider 7 is disposed at one end of the indoor heat exchanger 6. The compressor 1, the four-way valve 2, the outdoor heat exchanger 3, the liquid receiver 4, the expansion valve 5 and the indoor heat exchanger 6 constitute a refrigerant circuit.
[0017]
FIG. 2 shows a cross-sectional view of the main part of the refrigerant flow divider 7. As shown in FIG. 2, the refrigerant flow divider 7 has a large-diameter portion 20a formed on the inflow side and three diversion passages 21 and 22 (only two are shown in FIG. 2) on the outflow side. It has a cylindrical base portion 20 and an inflow pipe connecting portion 30 fitted to the large diameter portion 20a of the base portion 20. A medium diameter part 31, a small diameter inflow side throttle part 32, and a large diameter part 33 are formed in this order from the inflow side of the inflow pipe connecting part 30. A branch space 34 is formed by the collision wall 27 which is the bottom surface portion of the large diameter portion 20 a of the base portion 20 and the large diameter portion 33 of the inflow pipe connecting portion 30. One end of an outflow pipe (not shown) is fitted in each of the three branch passages 21 and 22 (only two are shown in FIG. 2), and the large-diameter portion 31 of the inflow pipe connection portion 30 is fitted. One end of the inflow pipe 39 is fitted to the end.
[0018]
3 is an enlarged arrow view of the refrigerant flow divider 7 of FIG. 1 as viewed from the direction of the arrow R1, and as shown in FIG. 3, the inflow of the three flow dividing passages 21, 22, 23 of the base 20 On the side, there are provided diversion-side throttle portions 24, 25 and 26, respectively.
[0019]
Here, in FIG. 2, the flow rate of the refrigerant flowing into the inflow pipe 31 is G [kg / s], the height of the flow direction of the refrigerant in the branch space 34 is H [m], and the inner diameter of the inflow pipe 39 is Di [mm] and when the inner diameter of the small diameter inflow side throttle portion 32 of the inflow pipe connection portion 30 is D0 [mm],
G / H> 3 ……………… (Formula 1)
Di / D0 <2 ……………… (Formula 2)
G, H, Di and D0 are set so as to satisfy the above condition. The inner diameter D0 of the inflow side throttle portion 32 is equal to or less than the inner diameter Di of the inflow pipe 39.
[0020]
Further, when the inner diameter of the flow restrictor is D1 to Dn (n = 2, 3,...) And the number of the flow diverting passages is n, the inner diameters D1 to Dn of the flow restrictor are more than Di / n, respectively. Set to be larger. That is, in FIG.
Dm> Di / 3 ……………… (Formula 3)
(However, m = 1,2,3)
It is set to satisfy the conditions.
[0021]
In this way, the refrigerant flowing in from the inflow pipe 39 passes through the inflow side throttle portion 32 and then collides with the collision wall 27 in the branch space 34 and is stirred and mixed uniformly. Further, by setting the refrigerant flow rate G flowing into the inflow pipe 39 and the height H in the flow direction of the refrigerant in the branch space 34 so as to satisfy the condition of G / H> 3, the refrigerant drift can be suppressed. In addition, an increase in pressure loss can be prevented by setting the inner diameter Di of the inflow pipe 39 and the inner diameter D0 of the inflow side restricting portion 32 so as to satisfy the condition of Di / D0 <2. Therefore, this simple configuration refrigerant flow divider can reduce refrigerant drift with low loss and low noise, and can realize an air conditioner with high efficiency and low noise.
[0022]
The refrigerant distribution ratio can be arbitrarily set by appropriately setting the inner diameters D1 to D3 of the diversion-side throttle portions 24 to 26 provided between the branch space 34 and the diversion passages 21 to 23. By setting the inner diameters D1 to D3 of the side throttle portions 24 to 26 to be larger than Dn> Di / 3, the refrigerant drift flows without excessively narrowing the flow dividing side throttle portions 24 to 26 and increasing the pressure loss. The aperture structure can be made to an extent that does not affect
[0023]
Further, as shown in FIG. 3, the minimum radius Dw inside the diversion-side restricting portions 24 to 26 around the axis of the cylindrical base portion 20 is larger than the inner diameter D0 of the inflow-side restricting portion 32 of the inflow pipe connecting portion 30. Set as follows. By doing so, it is possible to secure a collision wall 27 wider than the cross-sectional area of the inner periphery of the inflow side throttle portion 32 of the inflow pipe connection portion 30, and the refrigerant flowing from the inflow pipe 39 collides with the collision wall 27. Since it is stirred, it can mix uniformly.
[0024]
FIG. 4 shows a cross-sectional view of the main part of another refrigerant distributor. The refrigerant flow divider 17 has the same configuration as the refrigerant flow divider 7 shown in FIGS. 2 and 3 except for the collision wall.
[0025]
As shown in FIG. 4, the refrigerant distributor 17 has a large-diameter portion 40a formed on the inflow side and three branch passages 41 and 42 (only two are shown in FIG. 4) on the outflow side. It has a cylindrical base 40 and an inflow pipe connecting portion 50 fitted to the large diameter portion 40 a of the cylindrical base 40. A medium diameter part 51, a small diameter throttle part 52, and a large diameter part 53 are formed in this order from the inflow side of the inflow pipe connecting part 50. The collision wall 47 which is the bottom surface portion of the large diameter portion 40 a of the cylindrical base portion 40 and the large diameter portion 53 of the inflow pipe connection portion 50 form a branch space 54. Then, one end of the inflow pipe 59 is fitted in the large diameter part 51 of the inflow pipe connection part 50. A conical recess 48 is formed in the collision wall 47, and the conical angle of the recess 48 is 120 °.
[0026]
5 is an enlarged arrow view of the refrigerant flow divider of FIG. 4 as viewed from the direction of the arrow R2, and the flow dividing side restricting portion 44, on the inflow side of the three flow dividing passages 41, 42, 43 of the cylindrical base 40. 45 and 46 are provided.
[0027]
In the refrigerant flow divider 17, the concave portion 48 provided in the collision wall 47 causes the refrigerant flowing from the inflow pipe 59 through the inflow side restricting portion 52 to collide with the concave portion 48 of the collision wall 47 and be agitated. Mixed.
[0028]
The concave portion 48 provided in the collision wall 47 of the refrigerant distributor 17 has a conical shape with a cone angle of 120 °. However, the shape of the concave portion is not limited to this, and a spherical concave portion or the like is provided in the collision wall. May be.
[0029]
FIG. 6 is a schematic diagram showing the configuration of an indoor heat exchanger of an air conditioner using a refrigerant distributor according to another embodiment of the present invention, and the air conditioner shown in FIG. 1 except for the indoor heat exchanger. It has the same configuration as the machine.
[0030]
As shown in FIG. 6, the indoor heat exchanger of the air conditioner includes a first heat exchange unit 61 for reheating that functions as a condenser during dry operation, and a second heat exchange unit 62 that functions as an evaporator during dry operation. , 63. A refrigerant flow distributor 65 is disposed at a branch point between the first heat exchange section 61 and the second heat exchange sections 62 and 63, and an expansion valve is provided between the refrigerant flow distributor 65 and the first heat exchange section 61. 65 is disposed. The refrigerant distributor 65 has the same configuration as the refrigerant distributor shown in FIG. 2 except that the number of outlet pipes is two. In this case, (Expression 1) to (Expression 3) are satisfied.
[0031]
In particular, a refrigerant distributor 65 that can reduce refrigerant drift with low loss and low noise at an intermediate point between the first heat exchanging part 61 for reheating and the second heat exchanging parts 62 and 63 where the refrigerant becomes a gas-liquid two-phase flow. By providing the air conditioner, a highly efficient and low noise air conditioner can be realized.
[0032]
In the said embodiment, although it was set as the indoor heat exchanger which has the 2nd 2nd heat exchange parts 62 and 63 connected in parallel, a 2nd or more 2nd heat exchange part may be sufficient.
[0033]
The present applicant conducted an experiment using an indoor heat exchanger configured as shown in FIG. 7 in order to obtain the conditions of the above (formula 1) and (formula 2). The experimental results will be described below. The refrigerant flow divider used in the experiment has the same configuration as the refrigerant flow divider shown in FIG. 2 except that there are two flow dividing passages.
[0034]
As shown in FIG. 7, the indoor heat exchanger includes a first heat exchanger 71 for reheating and a second heat exchanger 72 having two passes. One end of the inlet refrigerant pipe 73 is connected to the upper inlet side of the first heat exchanger 71, and one end of the refrigerant pipe 74 is connected to the lower outlet side of the first heat exchanger 71. The other end of the refrigerant pipe 74 is connected to the inflow side of the refrigerant flow divider 76, and an expansion valve 75 is disposed in the refrigerant pipe 74. Then, the two outflow pipes 77A and 77B of the refrigerant distributor 76 are connected to the inlet sides of the two paths of the second heat exchanger 72, respectively. A merger 78 is connected to the outlet side of the two paths of the second heat exchanger 72, and an outlet refrigerant pipe 79 is connected to the outflow side of the merger 78. Note that the heat exchange area, the air volume, etc. of the two-pass refrigerant path of the second heat exchanger 72 are set to the same conditions.
[0035]
The refrigerant flow rate of the refrigerant flowing into the inlet refrigerant pipe 73 of the indoor heat exchanger shown in FIG. 7, that is, the refrigerant flow rate G of refrigerant flowing into the inflow side of the refrigerant flow divider 76 = 0.01 [kg / s], and G = 0. At 0.02 [kg / s], the refrigerant temperatures TA and TB at the two-pass outlets A and B of the second heat exchanger 72 are measured to determine the drift width (absolute value of the temperature difference between the refrigerant temperatures TA and TB). The results are shown in FIG. In addition, the inner diameter Di = 6.5 [mm] of the inflow pipe of the refrigerant flow divider 76, the inner diameter D0 = 5 [mm] of the throttle part of the inflow pipe connecting portion, and Di / D0 = 1.3. In FIG. 8, the horizontal axis indicates G / H, the vertical axis indicates the drift width, black circles indicate data when G = 0.01 [kg / s], and white triangles indicate G = 0.02. The data is for [kg / s]. As can be seen from FIG. 8, when G / H is less than 3 [kg / s · m], the drift width is less than 2 [deg]. It can be seen that it is within the range.
[0036]
Next, FIG. 9 shows the result of measuring the pressure loss [kPa · G] by changing the ratio Di / D0 of the inner diameter Di of the inflow pipe to the inner diameter D0 of the throttle section of the inflow pipe connecting portion of the refrigerant flow divider 76. Yes. In FIG. 9, the horizontal axis indicates Di / D0, the vertical axis indicates pressure loss, black circles indicate data when G = 0.01 [kg / s], and white triangles indicate G = 0.02. The data is for [kg / s]. As is clear from FIG. 9, when Di / D0 is less than 2, even if the refrigerant flow rate G is 0.02 [kg / s], the pressure loss is less than 150 [kPa · G], It can be seen that the pressure loss falls within a practically non-problematic range by satisfying the condition (1).
[0037]
In the above embodiment, an air conditioner using a refrigerant flow divider has been described. However, the refrigerant flow divider may be used for a device having a refrigerant circuit such as another refrigerator.
[0038]
【The invention's effect】
As is clear from the above, according to the refrigerant flow divider of the first aspect of the present invention, in the refrigerant flow divider that diverts the refrigerant that flows in from the inflow pipe to the plurality of branch passages, the refrigerant that flows in from the inflow pipe A branch space distributed to the branch flow path, an inflow side throttle portion provided between the inflow pipe and the branch space, and a collision wall in which the refrigerant flowing in from the inflow side throttle portion collides in the branch space. The refrigerant flow rate G flowing into the inflow pipe and the height H in the direction in which the refrigerant flows in the branch space are set so as to satisfy the condition of G / H> 3. By setting the inner diameter Di of the tube and the inner diameter D0 of the inflow side throttle portion so as to satisfy the condition of Di / D0 <2, an increase in pressure loss can be prevented. Accordingly, it is possible to realize a refrigerant flow divider that can reduce refrigerant drift with low loss and low noise with a simple configuration.
In addition, the refrigerant distribution ratio can be arbitrarily set by appropriately setting the inner diameter Dn of the diversion-side restricting portion provided between the branch space and the plurality of diversion passages, and the inner diameter of each diversion-side restricting portion. By setting Dn to satisfy Dn> Di / n (n is the number of flow dividing passages), it is possible to prevent the pressure loss from being increased by excessively restricting the flow dividing side restricting portion and not to affect refrigerant drift. The aperture structure can be made.
[0039]
Further, according to the refrigerant flow divider of the invention of claim 2, in the refrigerant flow divider of claim 1, the refrigerant that has flowed from the inflow pipe through the inflow side restricting portion is caused by the recess provided in the collision wall. It collides with the concave portion of the collision wall and is stirred, so that it can be mixed more uniformly.
[0040]
[0041]
Moreover, according to the air conditioner of the invention of claim 3 , in the air conditioner including an evaporator having a plurality of heat exchange units, the upstream side and the downstream side heat exchange units of the plurality of heat exchange units. And a branch point where the refrigerant is diverted to two or more heat exchange parts on the downstream side, particularly in the middle part of the evaporator where the refrigerant becomes a gas-liquid two-phase flow with low loss. Therefore, by disposing the refrigerant flow divider that can reduce refrigerant drift with low noise, a highly efficient and low noise air conditioner can be realized.
[0042]
According to a fourth aspect of the present invention, there is provided an air conditioner in which a compressor, an outdoor heat exchanger, a first pressure reducer, a first indoor heat exchanger, a second pressure reducer, and a second indoor heat exchanger are connected in a ring shape. In an air conditioner having a constructed refrigerant circuit, the first pressure reducer is fully opened and the second pressure reducer is throttled to produce a compressor, an outdoor heat exchanger, a first pressure reducer, and a first indoor heat exchanger. , Circulating the refrigerant in the order of the second decompressor and the second indoor heat exchanger, using the first indoor heat exchanger as a condenser for reheating, and using the second indoor heat exchanger as an evaporator for dehumidifying When the dry operation is performed, the refrigerant after the expansion by the second pressure reducer is reduced in loss and noise, and the refrigerant flow divider that can reduce the refrigerant drift is used to connect a plurality of the second indoor heat exchangers connected in parallel. Since the air is diverted to the heat exchanging section, a highly efficient and low noise air conditioner can be realized.
[Brief description of the drawings]
FIG. 1 is a circuit diagram showing a configuration of an air conditioner using a refrigerant flow divider according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view of a main part of the refrigerant flow divider of the air conditioner.
FIG. 3 is an arrow view when FIG. 2 is viewed from the direction of an arrow R1.
FIG. 4 is a cross-sectional view of the main part of another refrigerant distributor.
FIG. 5 is an arrow view of FIG. 4 viewed from the direction of arrow R2.
FIG. 6 is a schematic view showing a configuration of an indoor heat exchanger of an air conditioner using a refrigerant flow divider according to another embodiment of the present invention.
FIG. 7 is a schematic view showing a configuration of a heat exchanger using a refrigerant flow divider.
FIG. 8 is a diagram showing a characteristic of drift width with respect to G / H in the heat exchanger shown in FIG.
FIG. 9 is a graph showing the characteristics of pressure loss with respect to Di / D0 in the heat exchanger shown in FIG.
[Explanation of symbols]
1 ... compressor, 2 ... four-way valve,
3 ... outdoor heat exchanger, 4 ... liquid receiver,
5 ... expansion valve, 6 ... indoor heat exchanger,
7 ... refrigerant shunt,
20, 40 ... base, 20a, 40a ... large diameter part,
21 to 23, 41 to 43 ...
24 to 26, 44 to 46, ...
27, 47 ... collision wall, 30, 50 ... inflow pipe connection,
31, 51 ... medium diameter part, 32, 52 ... inflow side throttle part,
33, 53 ... large diameter part, 34, 54 ... branch space,
39,59 ... inflow pipe, 48 ... concave,
61 ... 1st heat exchange part, 62,63 ... 2nd heat exchange part,
64 ... expansion valve, 65 ... refrigerant flow divider,
71 ... 1st heat exchanger, 72 ... 2nd heat exchanger,
73 ... Inlet refrigerant piping, 74 ... Refrigerant piping,
75 ... expansion valve, 76 ... refrigerant flow divider,
77A, 77B ... Outflow piping, 78 ... Merger 78,
79 ... Outlet refrigerant piping.

Claims (4)

In the refrigerant flow divider for diverting the refrigerant flowing in from the inflow pipe (39, 59) to the plurality of diversion passages (21 to 23, 41 to 43),
A branch space (34, 54) for distributing the refrigerant flowing in from the inflow pipe (39, 59) to the plurality of branch passages (21-23, 41-43);
An inflow side throttle (32, 52) provided between the inflow pipe (39, 59) and the branch space (34, 54);
A collision wall (27, 47) provided so that the refrigerant flowing in from the inflow side throttle portion (32, 52) collides in the branch space (34, 54),
The flow rate of refrigerant flowing into the inflow pipe (39, 59) is G [kg / s], the height of the branch space (34, 54) in the direction in which the refrigerant flows is H [m], and the inflow pipe (39 , 59) is Di [mm], and the inflow side throttle part (32, 52) is D0 [mm],
G / H> 3
Di / D0 <2
Together to satisfy the conditions,
A diversion side restricting portion (24 to 26, 44 to 46) is provided between the branch space (34, 54) and the plurality of diversion passages (21 to 23, 41 to 43), respectively.
When the inner diameter of the diversion-side restricting portion (24 to 26, 44 to 46) is Dn and the number of the diversion passages is n,
Dn> Di / n
Satisfy the conditions of
The diversion-side restricting portions (24 to 26, 44 to 46) are arranged in the circumferential direction around the axis of the inflow pipe (39, 59),
The minimum radius Dw centered on the axis of the inflow pipe (39, 59) in the inner region surrounded by the diversion side restricting portion (24 to 26, 44 to 46) is set to the inflow side restricting portion (32, 52). A refrigerant shunt characterized in that it is larger than the inner diameter D0 . The refrigerant shunt according to claim 1, wherein
A refrigerant distributor according to claim 1, wherein a concave portion (48) is provided in the collision wall (47). In an air conditioner including an evaporator having a plurality of heat exchange units (61 to 63),
The refrigerant is divided into two or more heat exchange sections (62, 63) at the connection point connecting the upstream and downstream heat exchange sections among the plurality of heat exchange sections (61 to 63). An air conditioner characterized in that the refrigerant distributor (65) according to claim 1 or 2 is disposed at a branching point. Compressor (1), outdoor heat exchanger (3), first decompressor (5), first indoor heat exchanger (61), second decompressor (65), and second indoor heat exchanger are connected in an annular shape In an air conditioner equipped with a refrigerant circuit configured as
The second indoor heat exchanger comprises a plurality of heat exchange parts (62, 63) connected in parallel,
The refrigerant flow divider (65) according to claim 1 or 2 is disposed at a branch point between the second pressure reducer (65) and the second indoor heat exchanger (62, 63). Air conditioner.

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