JP2002130868A - Refrigerant distributor and air conditioner employing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a refrigerant distributor, low in loss as well as in noise and capable of reducing the bias flow of refrigerant by a simple constitution while being capable of setting a refrigerant distributing ratio arbitrarily, and an air conditioner, high in an efficiency and low in noise while employing the refrigerant distributor. SOLUTION: The refrigerant, conducted to flow into a branching space 34 from an inflow pipe 39 through an inflow side choking unit 27, is collided against a colliding wall 27 and is mixed, then, is distributed into distributing flow passages 21, 22 from the branching space 34 through distributing side choking units 24, 25. The flow amount G of refrigerant conducted to flow into the inflow pipe 39, the height H in the flow direction of the refrigerant in the branching space 34, the inner diameter Di of the inflow pipe 39 and the inner diameter D0 of the inflow side choking unit 32 are set respectively so as to satisfy the conditions of G/H>3 and Di/D0<2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerant distribution device for dividing a refrigerant flowing from an inflow pipe into a plurality of distribution passages, and an air conditioner using the same.

[0002]

2. Description of the Related Art Conventionally, there is an air conditioner provided with a refrigerant circuit constituted by connecting a compressor, an outdoor heat exchanger, an expansion valve and an indoor heat exchanger in a ring shape. In the outdoor heat exchanger and the indoor heat exchanger of the air conditioner, the refrigerant is distributed 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, in the dry operation, the cooling operation, and the heating operation for controlling the temperature, the refrigerant drift in the evaporator having a plurality of paths (the indoor heat exchanger or the outdoor heat exchanger) is small and the pressure loss is low. A refrigerant shunt has become essential.

[0003]

However, in the above-described air conditioner, if the refrigerant flow is reduced by focusing on the flow dividing performance of the refrigerant flow divider, pressure loss and noise increase, while conversely, the flow rate of the refrigerant flow divider increases. If an attempt is made to reduce the pressure loss, there is a problem that the refrigerant drift tends to increase due to fluctuations in the dryness of the refrigerant and the flow velocity of the refrigerant, resulting in a decrease in operating capacity.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a refrigerant diverter which can reduce refrigerant drift with low loss and low noise by a simple structure, and which can set a refrigerant distribution ratio arbitrarily. It is to provide a simple air conditioner.

[0005]

To achieve the above object, an air conditioner according to a first aspect of the present invention is a refrigerant distributor which divides refrigerant flowing from an inlet pipe into a plurality of branch passages. Branch space for distributing the divided refrigerant to the plurality of branch passages, an inflow-side restrictor provided between the inflow pipe and the branch space, and a refrigerant flowing from the inflow-side restrictor is disposed in the branch space. And a collision wall provided so as to collide with the refrigerant at a flow rate of G [kg
/ S], the height of the branch space in the direction in which the refrigerant flows is H [m], the inside diameter of the inflow pipe is Di [mm], and the inside diameter of the inflow-side throttle is D0 [mm]. , G / H> 3Di / D0 <2.

According to the refrigerant distribution device of the first aspect, the refrigerant flowing from the inflow pipe collides with the collision wall in the branch space and agitates after the flow velocity increases through the inflow-side throttle. And mixed evenly. Then, the refrigerant uniformly mixed in the branch space is divided into a plurality of branch passages. At this time, by setting the flow rate G of the refrigerant flowing into the inflow pipe and the height H in the direction in which the refrigerant flows in the branch space so as to satisfy the condition of G / H> 3, it is possible to suppress the refrigerant drift and suppress the inflow pipe. By setting the inner diameter Di and the inner diameter D0 of the inflow-side restrictor so as to satisfy the condition of Di / D0 <2, an increase in pressure loss can be prevented. 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.

[0007] The refrigerant flow divider according to claim 2 is based on claim 1.
In the above refrigerant distribution device, a recess is provided in the collision wall.

According to the refrigerant distributor of the second aspect, the refrigerant flowing from the inflow pipe through the inflow-side throttle portion collides with the concave portion of the collision wall by the concave portion provided in the collision wall and is stirred. And more evenly mixed.

[0009] Further, the refrigerant flow divider according to claim 3 is based on claim 1.
Alternatively, in the two refrigerant flow dividers, a flow restricting portion is provided between the branch space and the plurality of flow dividing passages, the inner diameter of the flow dividing side restricting portion is Dn, and the number of the flow dividing passages is n.
Where the condition of Dn> Di / n is satisfied.

According to the refrigerant distribution device of the third aspect, by appropriately setting the inner diameter Dn of the distribution-side restricting portion provided between the branch space and the plurality of distribution passages, the refrigerant distribution ratio can be improved. Can be set arbitrarily. Further, by setting the inner diameter of each branch-side throttle portion so as to satisfy Dn> Di / n, pressure loss does not increase due to excessive narrowing of the branch-side throttle portion, so that the refrigerant flow is not affected. A diaphragm structure can be used.

According to a fourth aspect of the present invention, there is provided an air conditioner including an evaporator having a plurality of heat exchange sections, wherein the upstream and downstream heat exchange sections of the plurality of heat exchange sections are separated. 4. The method according to claim 1, wherein the connection point is a connection point and a branch point for dividing the refrigerant into two or more heat exchange units on the downstream side.
It is characterized in that two refrigerant flow dividers are provided.

According to the air conditioner of the fourth aspect, at the connection point connecting the upstream and downstream heat exchange sections of the plurality of heat exchange sections, and at the connection point of the plurality of heat exchange sections. At the branch point where the refrigerant is diverted to two or more heat exchange sections on the downstream side of
In particular, the refrigerant becomes a gas-liquid two-phase flow, but by arranging the refrigerant diverter capable of reducing refrigerant drift with low loss and low noise in the middle part of such an evaporator, high efficiency and low noise are achieved. An air conditioner can be realized.

The air conditioner according to claim 5 is a compressor,
An air conditioner including a refrigerant circuit configured by connecting an outdoor heat exchanger, a first decompressor, a first indoor heat exchanger, a second decompressor, and a second indoor heat exchanger in an annular manner, An indoor heat exchanger is composed of a plurality of heat exchange units connected in parallel, and at a branch point between the second decompressor and the second indoor heat exchanger,
A refrigerant distributor according to any one of claims 1 to 3 is provided.

According to the air conditioner of the fifth aspect, the first decompressor is fully opened, and the second decompressor is squeezed to reduce the compressor, the outdoor heat exchanger, the first decompressor, the first indoor heat exchanger. The refrigerant is circulated in the order of the exchanger, 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 dehumidifying. And dry operation. In the air conditioner performing such a dry operation, the refrigerant deflection with low loss, low noise, and the branch point between the plurality of heat exchangers connected in parallel of the second indoor heat exchanger and the second pressure reducer. Since the refrigerant after expansion by the second decompressor is diverted by using the refrigerant diverter capable of reducing
High efficiency and low noise air conditioner can be realized.

[0015]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a refrigerant flow divider according to the present invention and an air conditioner using the same.

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, wherein 1 is a compressor, and 2 is connected to the discharge side of the compressor 1. The four-way valve 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 liquid receiver 4. Is an expansion valve having one end connected to the other end, and 6 is an indoor heat exchanger having one end connected to the other end of the expansion valve 5 and the other end connected to the suction side of the compressor 1 via the four-way valve 2. It is a vessel. The indoor heat exchanger 6 has three paths, and a refrigerant flow divider 7 is provided at one end of the indoor heat exchanger 6. The compressor 1, the four-way valve 2, the outdoor heat exchanger 3, the receiver 4,
The expansion valve 5 and the indoor heat exchanger 6 constitute a refrigerant circuit.

FIG. 2 is a sectional view of a main part of the refrigerant flow divider 7. As shown in FIG. 2, the refrigerant distributor 7 has a large-diameter portion 20a formed on the inflow side, and three distribution passages 21 and 22 (only two are shown in FIG. 2) on the outflow side. It has a cylindrical base 20 and an inflow pipe connection 30 fitted into the large diameter portion 20a of the base 20.
From the inflow side of the inflow pipe connection portion 30, a middle diameter portion 31, a small diameter inflow side throttle portion 32, and a large diameter portion 33 are formed in this order. A branch space 34 is formed by the collision wall 27, which is the bottom surface of the large diameter portion 20a of the base 20, and the large diameter portion 33 of the inflow pipe connecting portion 30.
Is formed. Then, the above three branch passages 21 and 2
2 (only two are shown in FIG. 2), one end of each of the outflow pipes (not shown) is fitted, and the large-diameter portion 3 of the inflow pipe connection portion 30 is fitted.
One end of the inflow pipe 39 is fitted into the inside 1.

FIG. 3 shows the refrigerant flow divider 7 of FIG.
FIG. 4 is an enlarged view taken in the direction of arrow 1 and, as shown in FIG. 3, diversion-side restrictors 24, 25, and 26 are provided on the inflow sides of the three diversion passages 21, 22, and 23 of the base 20, respectively. ing.

In FIG. 2, the flow rate of the refrigerant flowing into the inflow pipe 31 is represented by G [kg / s], the height of the branch space 34 in the direction in which the refrigerant flows is represented by H [m], and the inflow pipe 39 is formed.
G / H> 3 (3) where Di / mm is the inner diameter of Di and the inner diameter of the small-diameter inflow-side throttle portion 32 of the inflow pipe connection portion 30 is D0 [mm]. D0 <2 ... G, H, Di and D0 are each set so as to satisfy the condition of (Equation 2). The inner diameter D0 of the inflow-side restrictor 32 is equal to or less than the inner diameter Di of the inflow pipe 39.

Further, the inside diameter of the branching portion on the branch side is D1 to Dn (n
= 2, 3,...) And the number of branch paths is n, the inner diameters D1 to Dn of the branch portions on the branch side are set to be larger than Di / n. That is, in FIG. 3, Dm> Di / 3... (3) (where m = 1, 2, 3).

As described above, the refrigerant flowing from the inflow pipe 39 collides with the collision wall 27 in the branch space 34 after passing through the inflow-side restricting portion 32, and is stirred and uniformly mixed.
Further, by setting the flow rate G of the refrigerant flowing into the inflow pipe 39 and the height H in the direction in which the refrigerant flows in the branch space 34 so as to satisfy the condition of G / H> 3, it is possible to suppress the refrigerant drift. In addition, by setting the inner diameter Di of the inflow pipe 39 and the inner diameter D0 of the inflow-side throttle portion 32 so as to satisfy the condition of Di / D0 <2, it is possible to prevent an increase in pressure loss. Therefore, with this simple configuration of the refrigerant flow divider, the refrigerant drift can be reduced with low loss and low noise, and an air conditioner with high efficiency and low noise can be realized.

The inside diameters D1 to D1 of the branching side throttles 24 to 26 provided between the branch space 34 and the branching passages 21 to 23 are defined.
By appropriately setting D3, the refrigerant distribution ratio can be arbitrarily set, and by setting the inner diameters D1 to D3 of the respective diversion-side restrictors 24 to 26 so as to be larger than Dn> Di / 3, the diversion is achieved. A throttle structure that does not affect the refrigerant drift can be provided without increasing the pressure loss by excessively narrowing the side throttle portions 24-26.

Further, as shown in FIG. 3, the minimum radius Dw inside the diversion-side restriction portions 24 to 26 around the axis of the cylindrical base 20 is set to the inner diameter D0 of the inflow-side restriction portion 32 of the inflow pipe connection portion 30. Set to be larger than By doing so, it is possible to secure a collision wall 27 that is wider than the inner peripheral cross-sectional area of the inflow-side throttle portion 32 of the inflow-pipe connection portion 30.
Since the refrigerant flowing from the inflow pipe 39 collides with the collision wall 27 and is agitated, the refrigerant can be uniformly mixed.

FIG. 4 is a cross-sectional view of a main part of another refrigerant diverter. This refrigerant distributor 17 has the same configuration as the refrigerant distributor 7 shown in FIGS. 2 and 3 except for the collision wall.

As shown in FIG.
Has a cylindrical base 40 in which a large-diameter portion 40a is formed on the inflow side and three branch passages 41 and 42 (only two are shown in FIG. 4) are formed on the outflow side. It has an inflow pipe connection part 50 fitted to the large diameter part 40a. From the inflow side of the inflow pipe connecting portion 50, the middle diameter portion 5 is sequentially arranged.
1. A small diameter narrowed portion 52 and a large diameter portion 53 are formed. A branch space 54 is formed by the collision wall 47, which is the bottom surface of the large diameter portion 40a of the cylindrical base 40, and the large diameter portion 53 of the inflow pipe connecting portion 50. One end of the inflow pipe 59 is fitted into the large-diameter portion 51 of the inflow pipe connection section 50. Further, a conical recess 48 is formed in the collision wall 47, and the cone angle of the recess 48 is 120 °.

FIG. 5 shows the refrigerant flow divider of FIG.
FIG. 5 is an enlarged view as viewed from the direction of FIG.
4, 45 and 46 are provided respectively.

In the refrigerant flow divider 17, the refrigerant flowing from the inflow pipe 59 via the inflow-side throttle 52 collides with the concave portion 48 of the collision wall 47 and is stirred by the concave portion 48 provided in the collision wall 47. More evenly mixed.

The concave portion 48 provided on the collision wall 47 of the refrigerant flow divider 17 has a conical shape with a conical angle of 120 °. However, the shape of the concave portion is not limited to this. It may be provided on a wall.

FIG. 6 is a schematic diagram showing the configuration of an indoor heat exchanger of an air conditioner using a refrigerant flow divider according to another embodiment of the present invention. It has the same configuration as the air conditioner shown.

As shown in FIG. 6, the indoor heat exchanger of the air conditioner has a first heat exchange section 61 for reheating functioning as a condenser during a dry operation, and a second heat exchanger functioning as an evaporator during a dry operation. Exchange units 62 and 63 are provided. A refrigerant flow divider 65 is disposed at a branch point between the first heat exchange unit 61 and the second heat exchange units 62 and 63, and an expansion valve is provided between the refrigerant flow divider 65 and the first heat exchange unit 61. 65 are arranged. The refrigerant distributor 65 has the same configuration as the refrigerant distributor shown in FIG. 2 except that there are two outflow pipes. In this case, (Equation 1)
It is assumed that (Equation 3) is satisfied.

In particular, the first refrigerant for reheating, in which the refrigerant becomes a gas-liquid two-phase flow,
At an intermediate point between the heat exchange unit 61 and the second heat exchange units 62 and 63,
Refrigerant flow divider 65 that can reduce refrigerant drift with low loss and low noise
By disposing the air conditioner, an air conditioner with high efficiency and low noise can be realized.

In the above embodiment, the indoor heat exchanger has the two second heat exchangers 62 and 63 connected in parallel. However, the number of the second heat exchangers may be three or more.

The applicant conducted an experiment using an indoor heat exchanger having the configuration shown in FIG. 7 in order to obtain the conditions of the above (Equation 1) and (Equation 2). Hereinafter, the experimental results will be described. Note that 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 branch passages.

This indoor heat exchanger is, as shown in FIG.
A first heat exchanger 71 for reheating and a two-pass second heat exchanger 7
And 2. One end of an inlet refrigerant pipe 73 is connected to the upper inlet side of the first heat exchanger 71, and the first heat exchanger 7
One end of the refrigerant pipe 74 is connected to the lower outlet side of the refrigerant pipe 1. 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 provided in the refrigerant pipe 74. The two outlet 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. Then, the second heat exchanger 72
A junction 78 is connected to the outlet side of the two paths, and an outlet refrigerant pipe 79 is connected to the outlet side of the junction 78. Note that the heat exchange area, the air volume, and the like of the two refrigerant paths of the second heat exchanger 72 are set to the same conditions.

The inlet refrigerant pipe 7 of the indoor heat exchanger shown in FIG.
3, the refrigerant flow rate G of the refrigerant flowing into the inflow side of the refrigerant flow divider 76 = 0.01 [kg /
s] and G = 0.02 [kg / s], the refrigerant temperatures TA and TB at the outlets A and B of the two passes of the second heat exchanger 72 are measured, and the drift width (the temperature of the refrigerant temperatures TA and TB) is measured. FIG. 8 shows the result of calculating the absolute value of the difference). The inside diameter Di of the inflow pipe of the refrigerant flow divider 76 was 6.5 mm, the inside diameter D0 of the constricted portion at the connection of the inflow pipe was 5 mm, and Di / D0 was 1.3. FIG.
In the graph, the horizontal axis represents G / H, the vertical axis represents the drift width, black circles indicate data when G = 0.01 [kg / s], and white triangles indicate G = 0.02 [kg. / S]. As is clear from FIG. 8, G / H is 3 [kg /
When the value is less than [s · m], the drift width is less than 2 [deg], and it can be seen that by satisfying the condition of the above (Equation 1), it is within a range in which there is no practical problem.

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 constriction portion of the inflow pipe connection part of the refrigerant flow divider 76. Is shown in In FIG. 9, the horizontal axis represents Di / D0, the vertical axis represents pressure loss, and the black circles represent G = 0.01 [kg / kg].
s], the white triangle indicates G = 0.02 [kg / s]
It is the data at the time of. As is apparent from FIG.
When / 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], and by satisfying the condition of the above (Equation 2), It can be seen that the pressure loss falls within a range where there is no practical problem.

In the above embodiment, the air conditioner using the refrigerant flow divider has been described. However, the refrigerant flow divider may be used for other devices having a refrigerant circuit such as a refrigerator.

[0038]

As is apparent from the above description, according to the refrigerant distributor of the first aspect of the present invention, in the refrigerant distributor which divides the refrigerant flowing from the inlet pipe into a plurality of branch passages, the refrigerant flows from the inlet pipe. Branch space that distributes the divided refrigerant to the plurality of branch passages, an inflow-side restrictor provided between the inflow pipe and the branch space, and a refrigerant flowing from the inflow-side restrictor is disposed in the branch space. A collision flow wall that flows into the inflow pipe and a height H of the branch space in the direction in which the refrigerant flows so as to satisfy the condition of G / H> 3. And the inner diameter D of the inflow pipe
By setting i and the inner diameter D0 of the inflow-side restrictor so as to satisfy the condition of Di / D0 <2, an increase in pressure loss can be prevented. 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.

According to the refrigerant distributor of the second aspect of the present invention, in the refrigerant distributor of the first aspect, the refrigerant flows from the inflow pipe through the inflow-side throttle portion by the recess provided in the collision wall. The refrigerant collides with the concave portion of the collision wall and is stirred, and can be mixed more uniformly.

According to a third aspect of the present invention, there is provided the refrigerant flow divider according to the first or second aspect, wherein the branch flow restrictor provided between the branch space and the plurality of flow paths is provided. By appropriately setting the inner diameter Dn, the refrigerant distribution ratio can be set arbitrarily, and the inner diameter D
By setting n so as to satisfy Dn> Di / n (n is the number of branch passages), the pressure loss does not increase due to excessive narrowing of the branch portion on the branch side, so that it does not affect the refrigerant drift. Aperture structure.

According to the air conditioner of the fourth aspect of the present invention, in an air conditioner provided with an evaporator having a plurality of heat exchange units, the upstream and downstream sides of the plurality of heat exchange units are provided. A connection point for connecting the heat exchange units, and a branch point for diverting the refrigerant to two or more heat exchange units on the downstream side, particularly at an intermediate portion of the evaporator where the refrigerant becomes a gas-liquid two-phase flow. , Low loss,
By arranging the refrigerant flow divider capable of reducing the refrigerant drift with low noise, an air conditioner with high efficiency and low noise can be realized.

The air conditioner according to the fifth aspect of the present invention comprises a compressor, an outdoor heat exchanger, a first decompressor, a first indoor heat exchanger,
In an air conditioner including a refrigerant circuit configured by connecting a decompressor and a second indoor heat exchanger in a ring shape, the first decompressor is fully opened, and the second decompressor is squeezed, and a compressor and an outdoor A refrigerant is circulated in the order of a heat exchanger, a first decompressor, a first indoor heat exchanger, a second decompressor, and a second indoor heat exchanger, and the first indoor heat exchanger is used as a condenser for reheating, When the dry operation is performed using the second indoor heat exchanger as an evaporator for dehumidifying, the refrigerant after expansion by the second decompressor is reduced in loss, using the refrigerant diverter that can reduce refrigerant drift with low noise. ,
Since the flow is divided into a plurality of heat exchangers connected in parallel of the second indoor heat exchanger, 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 sectional view of a main part of a refrigerant flow divider of the air conditioner.

FIG. 3 is an arrow view of FIG. 2 viewed from the direction of arrow R1.

FIG. 4 is a cross-sectional view of a main part of another refrigerant flow divider.

FIG. 5 is an arrow view of FIG. 4 viewed from the direction of arrow R2.

FIG. 6 is a schematic diagram 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 diagram showing a configuration of a heat exchanger using a refrigerant flow divider.

FIG. 8 is a diagram showing characteristics of a drift width with respect to G / H in the heat exchanger shown in FIG.

FIG. 9 is a diagram showing Di / D0 in the heat exchanger shown in FIG. 7;
FIG. 6 is a diagram showing characteristics of pressure loss with respect to FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Compressor, 2 ... Four-way valve, 3 ... Outdoor heat exchanger, 4 ... Liquid receiver, 5 ... Expansion valve, 6 ... Indoor heat exchanger, 7 ... Refrigerant diverter,
20, 40: base portion, 20a, 40a: large diameter portion, 21 to 23,
41-43 diverting passage, 24-26, 44-46 diverting-side constriction, 27, 47 collision wall, 30, 50 inflow pipe connection, 31, 51 medium-diameter portion, 32, 52 inflow Side throttle, 3
3, 53 ... large diameter part, 34, 54 ... branch space, 39, 59 ...
Inflow pipe, 48 recess, 61 first heat exchange section, 62, 63
... second heat exchange section, 64 ... expansion valve, 65 ... refrigerant flow divider, 7
DESCRIPTION OF SYMBOLS 1 ... 1st heat exchanger, 72 ... 2nd heat exchanger, 73 ... Inlet refrigerant piping, 74 ... Refrigerant piping, 75 ... Expansion valve, 76 ... Refrigerant splitter, 77A, 77B ... Outflow piping, 78 ... Merging device 78 ,
79 ... outlet refrigerant pipe.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Atsushi Endo, Inventor Atsushi Oya 1000, Okamotocho, Kusatsu-shi, Shiga Prefecture Daiga Industries Co., Ltd. Shiga Works (72) Inventor Yuji Yoneda 1000, Oya, Okamotocho, Kusatsu-shi, Shiga No.2 F-term (reference) in Daikin Industries, Ltd. Shiga Works 3H019 BA43 BC01 BC03

Claims (5)

[Claims] A refrigerant distribution device for dividing a refrigerant flowing from an inflow pipe (39, 59) into a plurality of distribution passages (21 to 23, 41 to 43), wherein the refrigerant flows from the inflow pipe (39, 59). Branch space for distributing refrigerant to the plurality of branch passages (21 to 23, 41 to 43)
(34, 54), an inflow-side throttle (32, 52) provided between the inflow pipe (39, 59) and the branch space (34, 54), and an inflow-side throttle (32, 52). 52), and a collision wall (27, 47) provided so that the refrigerant flowing from the branch space (34, 54) collides in the branch space (34, 54). [kg /
s], the height of the branch space (34, 54) in the direction in which the refrigerant flows is H [m], the inner diameter of the inflow pipe (39, 59) is Di [mm], and the inflow-side restrictor ( 32, 52), wherein when the inner diameter is D0 [mm], the following condition is satisfied: G / H> 3 Di / D0 <2. 2. The refrigerant flow divider according to claim 1, wherein a recess (48) is provided in the collision wall (47). 3. The refrigerant flow divider according to claim 1, wherein the branch space (34, 54) and the plurality of branch passages (21 to 21).
23, 41 to 43) and the branching portion on the diversion side (24 to 26, 4).
4 to 46), and the inner diameter of the diversion-side restrictor (24 to 26, 44 to 46) is Dn.
Wherein the number of the flow passages is n, and the condition of Dn> Di / n is satisfied. 4. An air conditioner provided with an evaporator having a plurality of heat exchange sections (61-63), wherein the upstream and downstream heat exchange sections of the plurality of heat exchange sections (61-63) are provided. At the junction where the refrigerant is diverted to the two or more heat exchangers (62, 63) on the downstream side,
The refrigerant flow divider (6) according to any one of claims 1 to 3,
An air conditioner characterized by including (5). 5. A compressor (1), an outdoor heat exchanger (3), a first pressure reducer (5), a first indoor heat exchanger (61), a second pressure reducer (65), and a second indoor heat exchange. An air conditioner provided with a refrigerant circuit configured by annularly connecting heat exchangers, wherein a plurality of heat exchange units in which the second indoor heat exchanger is connected in parallel
(62, 63), the second decompressor (65) and the second indoor heat exchanger (62, 6).
An air conditioner comprising the refrigerant diverter (65) according to any one of claims 1 to 3 disposed at a branch point between the air conditioner and the air conditioner.