JP3007839B2 - Shunt - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is mainly used for air conditioners and the like, and distributes two-phase refrigerants, gas phase and liquid phase, evenly.
Alternatively, it relates to a merging diverter.

[0002]

2. Description of the Related Art An evaporator constituting a refrigeration cycle includes:
In the case of a small size, the internal resistance of the refrigerant is small and the refrigerant flow path may be one flow path, but in the case of a large size, the total flow rate of the refrigerant increases, and in one flow path, the internal resistance increases, so that a plurality of flow paths are required. In addition, a uniform flow divider that can maximize the capacity of the evaporator is required.

Hereinafter, a conventional flow divider will be described with reference to FIGS. FIG. 3 is a front view of an evaporator using the conventional flow divider, FIG. 4 is a perspective view of the conventional flow divider, and FIGS. 5 and 6 are longitudinal sectional views of the conventional flow divider.

In FIG. 3, reference numeral 1 denotes an inlet side flow divider, 2 denotes an outlet side flow divider, 3 denotes a heat transfer tube, 4 denotes a fin, 5 denotes an inflow tube, 6
Is an outflow pipe. FIG. 4 is a perspective view of the inlet-side flow divider 1.

In FIG. 3, a refrigerant in a gas-liquid two-phase state flows into the inlet-side splitter 1 from the side A via the inflow pipe 5, then passes through a plurality of heat transfer tubes 3, and joins at the outlet-side splitter 2. Thereafter, it flows out of the outflow pipe 6 to the E side.

Next, the inside of a conventional flow divider will be described with reference to FIG. Note that δ represents the variation in the length of the insertion portion of the heat transfer tube 3 inserted into the flow divider 1 or the flow divider 2, and this amount δ is unavoidable in the assembly process and greatly affects the distribution balance. Was an influential factor.

Therefore, in order to restrict the amount δ to a small value, as shown in FIG. 6, the tip of the heat transfer tube 3 is tapered to form a tapered portion 8, and a hole is formed between the tapered portion 8 and the container 9. Δ was regulated by the mutual tolerance of.

[0008]

However, the above configuration has the following problems.

In general, the volume velocity of the refrigerant is low in the inlet-side flow divider 1 having a small degree of dryness, and the gas phase and the liquid phase are separated vertically by the influence of gravity, so that the refrigerant does not flow evenly through each heat transfer tube 3. There was a problem.

On the other hand, since the gas is in a gaseous state in the outlet flow divider 2 having a high degree of dryness, the volume velocity at the upper part of the outlet flow divider 2 is very high, but it merges at the lower part of the outlet flow divider 2. Since the number of flow paths is small and the volume speed is low, there is a problem that a pool is formed and the refrigerant does not flow evenly through each heat transfer tube 3.

SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide a flow divider on the inlet side and the outlet side on which the refrigerant flows evenly in each heat transfer tube.

[0012]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to inserting an insertion member into a vessel of a flow divider.
Therefore, the flow path cross-sectional area of the portion where the heat transfer tube on the side closest to the inflow pipe (or outflow pipe) connection position in the container is connected,
The flow passage cross-sectional area of the portion where the heat transfer tube on the side farthest from the inflow pipe (or outflow pipe) connection position is connected is made larger, and the inflow pipe (or outflow pipe) connection position in the vessel is the most. The flow path cross-sectional area of the portion where the heat transfer tube is connected between the heat transfer tube closest to the heat transfer tube and the heat transfer tube farthest from the connection position of the inflow pipe (or outflow pipe) is determined by the inflow pipe (or outflow pipe). ) Side is smaller than the flow path cross-sectional area of the portion where the adjacent heat transfer tubes are connected, and is larger than the flow path cross-sectional area of the portion where the adjacent heat transfer tubes are connected on the anti-inflow pipe (or outflow pipe) side. .

[0013] This allows the refrigerant to flow evenly through each heat transfer tube.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention is directed to a container having an inflow pipe connected to one end thereof and a plurality of vessels connected in parallel to each other along a direction away from the inflow pipe connection position. A heat transfer tube, wherein a refrigerant flowing into the container from the inflow tube is divided into a plurality of heat transfer tubes and flows out , and an insertion member is inserted into the container.
Accordingly, the flow path cross-sectional area of the portion where the heat transfer tube closest to the inflow pipe connection position in the vessel is connected is the portion where the heat transfer tube most remote from the inflow pipe connection position is connected. And the heat transfer tube between the heat transfer tube closest to the inflow pipe connection position and the heat transfer tube closest to the inflow tube connection position in the container is connected. The cross-sectional area of the flow path at the portion where the heat transfer pipe adjacent to the heat transfer pipe is connected on the inflow pipe side is smaller than the cross-sectional area of the flow path at the section where the adjacent heat transfer pipe is connected at the anti-inflow pipe side. The area is larger than the area, and by inserting the insertion member into the container, the shape of the space inside the container is optimized easily and at low cost, and the volume velocity of the refrigerant is made uniform to suppress the pressure loss. Can suppress the separation of gas and liquid phases and the accumulation of liquid. Refrigerant evenly distribute can flow evenly Kakuden heat pipe coolant.

The invention according to a second aspect of the present invention includes a container having one end connected to an outflow pipe, and a plurality of heat transfer tubes connected to the container in parallel along a direction away from the outflow pipe connection position. A diverter in which the refrigerant flowing into the container from the plurality of heat transfer tubes merges and flows out of the outflow tube; by inserting an insertion member into the container, the most outflow tube in the container; The flow path cross-sectional area of the portion where the heat transfer tube on the side close to the connection position is connected is made larger than the flow path cross-sectional area of the portion where the heat transfer tube on the side farthest from the outflow pipe connection position is connected. The flow path cross-sectional area of a portion where the heat transfer tube is connected between the heat transfer tube closest to the outlet pipe connection position and the heat transfer tube closest to the outlet tube connection position in the container, The adjacent heat transfer tube is connected on the outflow tube side. The cross-sectional area of the part is smaller than the cross-sectional area of the flow path and the cross-sectional area of the flow path of the part to which the adjacent heat transfer tube is connected on the anti-outflow pipe side. By optimizing the shape of the space inside the container, the pressure loss can be suppressed by making the volume velocity of the refrigerant uniform, suppressing the separation and pooling of the gas and liquid phases, and distributing the refrigerant evenly. Thus, the refrigerant can be uniformly flowed through each heat transfer tube.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. (Embodiment 1) FIG. 1 is a longitudinal sectional view of an inlet-side flow divider according to Embodiment 1 of the present invention. In the figure, reference numeral 1 denotes an inlet-side flow divider, 3 denotes a heat transfer tube, 5 denotes an inflow tube, 7c denotes an inlet-side insertion member, and 9 denotes a container for collectively connecting the heat transfer tubes 3.

In FIG. 1, an inlet pipe 5 is connected to a lower end of a vessel 9 of an inlet-side flow divider 1, and heat transfer tubes 3 are connected in a row at a predetermined pitch on a ridge line of the inlet-side flow divider 1. I have. In addition, an inlet-side insertion member 7c having an inclined surface 7 whose cross-sectional area increases as the distance from the connection position of the inflow pipe 5 increases, and is inserted into the inlet-side flow divider 1 at the same time. To cover the insertion portion of the heat transfer tube 3.

According to the above configuration, the refrigerant flowing in the gas-liquid two-phase state from the A side in FIG. 1 passes through the inflow pipe 5, flows into the container 9 of the inlet side flow divider 1 (B), and To the evaporator side (C).

Generally, the volume velocity is low in the inlet-side flow divider 1 having a small dryness, and the gas phase and the liquid phase are separated vertically by the influence of gravity. Since the cross-sectional area of the flow path becomes smaller toward the upper part, the volume velocity becomes relatively uniform in the container 9 (B) of the inlet-side flow divider 1, and the gas-liquid can be stirred while suppressing the pressure loss. It can be evenly distributed to each heat transfer tube 3.

As described above, in the present embodiment, the container 9 having one end connected to the inflow pipe 5 and the plurality of containers 9 connected to the container 9 in parallel along the direction away from the connection position between the container 9 and the inflow pipe 5. In the inlet-side flow divider 1 in which the refrigerant flowing from the inflow pipe 5 into the container 9 is divided into a plurality of heat transfer tubes 3 and flows out, the inlet-side insertion member 7c provides
The farther upward from the connection position of the inlet pipe 5 at the lower end, the smaller the cross-sectional area of the flow path in the container 9, and the smaller the portion of the container 9 to which the heat transfer tube 3 closest to the connection position of the inlet pipe 5 is connected. The cross-sectional area of the flow passage is made larger than the cross-sectional area of the flow passage at the portion where the heat transfer tube 3 farthest from the connection position of the inflow pipe 5 is connected, and the side of the vessel 9 closest to the connection position of the inflow pipe 5 The flow passage cross-sectional area of the portion where the heat transfer tube 3 is connected between the heat transfer tube 3 and the heat transfer tube 3 on the side farthest from the connection position of the inflow tube 5 is determined by the heat transfer tube 3 adjacent to the inflow tube 5 side. The insertion member 7c is inserted into the container 9 below the flow path cross-sectional area of the connected part and the flow path cross-sectional area of the part where the adjacent heat transfer tube 3 is connected on the side opposite to the inflow pipe 5. By doing
Easy and low cost, the further away from the connecting position of the inflow pipe 5,
By reducing the cross-sectional area of the flow path, the refrigerant can be evenly distributed and the refrigerant can flow to each heat transfer tube 3 evenly while suppressing the pressure loss according to the volume velocity.

Further, according to the present embodiment, the use of the inlet side insertion member 7c makes it possible to easily regulate the variation in the insertion amount of the heat transfer tube 3 into the vessel 9 (B) of the inlet side flow divider 1. Even distribution is possible.

In this embodiment, the entrance-side insertion member 7
c, the cross-sectional area of the flow path in the vessel 9 of the inlet-side flow divider 1 was continuously reduced as the distance from the connection position of the inflow pipe 5 at the lower end of the vessel 9 to the upper side increased, but the invention is not limited to this. The flow path cross-sectional area of the portion where the heat transfer tube 3 closest to the inflow pipe 5 connection position is connected to the flow cross-sectional area of the portion where the heat transfer tube 3 closest to the inflow pipe 5 connection position is connected The heat transfer tube 3 is connected between the heat transfer tube 3 on the side closest to the connection position of the inflow pipe 5 and the heat transfer tube 3 on the side farthest from the connection position of the inflow tube 5 in the container 9 while being larger than the cross-sectional area of the passage. The cross-sectional area of the flow path of the portion is smaller than the cross-sectional area of the flow path where the adjacent heat transfer tube 3 is connected on the inflow pipe 5 side, and the adjacent heat transfer pipe 3 is connected on the side opposite to the inflow pipe 5. What is necessary is just to make it larger than the flow path cross-sectional area of a part.

(Embodiment 2) FIG. 2 is a longitudinal sectional view of an inlet-side flow divider according to Embodiment 2 of the present invention. In the figure, 2 is an outlet side flow divider, 3 is a heat transfer tube, 6 is an outflow tube, 7d
Is an outlet side insertion member, and 9 is a container for collectively connecting the heat transfer tubes 3.

In FIG. 2, an outlet pipe 6 is connected to the upper end of the vessel 9 of the outlet side flow divider 2, and the heat transfer tubes 3 are connected in a row at a predetermined pitch on the ridge line of the outlet side flow divider 2. I have. Further, an outlet side insertion member 7d having an inclined surface 7 whose cross-sectional area becomes larger toward the lower portion away from the outlet pipe 6 connecting position is inserted into the outlet side flow distributor 2, and at the same time, inside the outlet side flow distributor 2 To cover the insertion portion of the heat transfer tube 3.

According to the above configuration, in FIG. 2, the refrigerant absorbs heat in the evaporator, flows into the outlet-side flow divider 2 in a gaseous state from the evaporator side (C), and the container 9 of the outlet-side flow divider 2 Inside (D)
And then guided to the E side from the outflow pipe 6.

Since the inside of the container 9 (D) of the outlet side flow divider 2 having a large dryness is in a gaseous phase, the volume velocity is very high.
In addition, although the flow rate is higher in the upper part, the flow path that merges in the lower part of the outlet side flow divider 2 is small and the volume velocity is low, so that a liquid pool may occur. Therefore, the outlet side insertion member 7d increases the cross-sectional area of the flow path in the container 9 of the outlet side flow divider 2 (D) toward the upper portion, so that the volume velocity is relatively uniform, the pressure loss is suppressed, and the formation of a liquid pool occurs. The heat transfer tubes 3
And can be evenly distributed.

As described above, in the present embodiment, the container 9 having the outflow pipe 6 connected to one end thereof and the plurality of vessels 9 connected to the container 9 in parallel along the direction away from the connection position between the container 9 and the outflow pipe 6. Of the outlet-side distributor 2 in which the refrigerant flowing into the vessel 9 from the plurality of heat-transfer pipes 3 merges and flows out of the outflow pipe 6 by the outlet-side insertion member 7d. The further away from the outflow pipe 6 connection position, the lower the container 9
The cross-sectional area of the flow passage in the container 9 is reduced, and
The flow path cross-sectional area of the portion where the heat transfer tube 3 closer to the connection position is connected is larger than the flow path cross-sectional area of the portion where the heat transfer tube 3 closest to the outflow pipe 6 connection position is connected. At the same time, the flow of the portion where the heat transfer tube 3 is connected between the heat transfer tube 3 closest to the outlet pipe 6 connection position and the heat transfer tube 3 closest to the outlet pipe 6 connection position in the container 9 is The cross-sectional area of the passage is equal to or smaller than the cross-sectional area of the flow passage of the portion where the adjacent heat transfer tube 3 is connected on the outflow pipe 6 side and the cross-sectional area of the flow passage of the portion where the adjacent heat transfer tube 3 is connected on the anti-outflow pipe 6 side. As described above, by inserting the insertion member 7d into the container 9,
Easy and low cost , the refrigerant is distributed evenly while reducing the pressure loss according to the volume velocity by reducing the cross-sectional area of the flow path as the distance from the connection position of the outflow pipe 6 increases. It can flow through the heat transfer tube 3.

Further, according to the present embodiment, the use of the outlet side insertion member 7d allows the outlet side flow divider 2 of the heat transfer tube 3 to be used.
The variation in the insertion amount into the container 9 (D) can also be easily regulated, and can be evenly distributed.

In the present embodiment, the outlet side insertion member 7
d, the cross-sectional area of the flow path in the container 9 of the outlet side flow divider 2 was continuously reduced as the distance from the outlet pipe 6 connection position at the upper end of the container 9 became lower, but the present invention is not limited to this. The cross-sectional area of the flow path of the portion where the heat transfer tube 3 closest to the connection position of the outflow pipe 6 is connected to the portion of the portion where the heat transfer tube 3 farthest from the connection position of the outflow tube 6 is connected. The heat transfer tube 3 between the heat transfer tube 3 on the side closest to the connection position of the outlet pipe 6 and the heat transfer tube 3 on the side farthest from the connection position of the outlet tube 6 in the container 9 is made larger than the cross-sectional area of the flow path. The flow passage cross-sectional area of the connected portion is equal to or smaller than the flow passage cross-sectional area of the portion where the adjacent heat transfer tube 3 is connected on the outflow tube 6 side, and the adjacent heat transfer tube 3 is connected on the anti-outflow tube 6 side. It is only necessary that the flow path cross-sectional area be equal to or larger than the flow path cross-sectional area of the part where the liquid crystal is present.

[0030]

As described above, the present invention comprises a vessel having one end connected to an inflow pipe, and a plurality of heat transfer tubes connected to the vessel in parallel along a direction away from the inflow pipe connection position, in flow divider refrigerant flowing into the container from the inlet pipe flows out is diverted to a plurality of the heat transfer tube, before
By inserting the insertion member into the container, the flow path cross-sectional area of the portion where the heat transfer tube on the side closest to the inflow pipe connection position in the container is connected, the most remote from the inflow pipe connection position The heat transfer tubes on the side closest to the inflow pipe connection position and the heat transfer tubes on the side furthest from the inflow tube connection position in the container are made larger than the flow path cross-sectional area of the portion where the heat transfer tubes on the side are connected. The heat transfer pipes between the heat pipes connected to the heat pipes are smaller than the flow path cross section of the part where the adjacent heat transfer pipes are connected on the inflow pipe side, and the heat transfer pipes adjacent on the anti-inflow pipe side Is greater than or equal to the cross-sectional area of the flow path of the part to which it is connected, and by inserting the insertion member into the container.
Easy and low cost, the pressure loss can be suppressed by optimizing the shape of the space inside the container to make the volume velocity of the refrigerant uniform, and the volume velocity of the refrigerant does not decrease in the flow divider. It is possible to stir gas and liquid, suppress separation of a gas phase and a liquid phase, suppress pooling, distribute the refrigerant evenly, and flow the refrigerant evenly through each heat transfer tube.

Also, a vessel having an outlet pipe connected to one end thereof, and a plurality of heat transfer pipes connected to the vessel in parallel along a direction away from the outflow pipe connection position are provided. in flow divider inflow refrigerant flows out from the outflow pipe joins the inner insertion portion into the container
By inserting the material, the flow passage cross-sectional area of the portion where the heat transfer tube closest to the outflow pipe connection position in the container is connected, the heat transfer tube most remote from the outflow pipe connection position is The flow path cross-sectional area of the connected portion is made larger, and between the heat transfer tube closest to the outlet pipe connection position and the heat transfer tube closest to the outlet tube connection position in the container. The flow path cross-sectional area of the portion where the heat transfer tube is connected is equal to or less than the flow path cross-sectional area of the portion where the adjacent heat transfer tube is connected on the outflow tube side, and the adjacent heat transfer tube is connected on the anti-outflow tube side. It is obtained by the above flow path cross-sectional area of the portion, volume
Easy and low cost by inserting the insertion member into the container
In this way, it is possible to optimize the shape of the space inside the container, make the volume velocity of the refrigerant uniform, suppress the pressure loss, suppress the separation and pooling of the gas and liquid phases, and distribute the refrigerant evenly. The refrigerant can be distributed and the refrigerant can be evenly passed through each heat transfer tube.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of an inlet-side flow divider according to a first embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of an outlet-side flow divider according to a second embodiment of the present invention.

FIG. 3 is a front view of a conventional evaporator equipped with a flow divider.

FIG. 4 is a perspective view of a conventional flow divider.

FIG. 5 is a longitudinal sectional view of a conventional flow divider.

FIG. 6 is a longitudinal sectional view of another conventional flow divider.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Inlet side flow splitter 2 Outlet side flow splitter 3 Heat transfer tube 5 Inflow pipe 6 Outflow pipe 9 Container

Continuation of front page (72) Inventor Hiroaki Kase 4-5-2-5 Takaida Hondori, Higashi-Osaka City, Osaka Inside Matsushita Refrigerating Machinery Co., Ltd. (72) Nagao Kido 4-2-2-5 Takaida Hondori, Higashi-Osaka City, Osaka Prefecture No. Matsushita Refrigeration Machinery Co., Ltd. (72) Inventor Takashi Nakason Matsushita Seiko Co., Ltd., 6-2-61 Imafukunishi, Joto-ku, Osaka-shi, Osaka (56) References JP-A-57-196045 (JP, A) Jpn. , U) (58) Fields investigated (Int. Cl. ⁷ , DB name) F25B 41/00 F28F 9/22

Claims (2)

(57) [Claims] 1. A container having one end connected to an inflow pipe, and a plurality of heat transfer tubes connected in parallel to the container along a direction away from the inflow pipe connection position, wherein the heat transfer pipe is provided in the container from the inflow pipe. In a flow divider in which the inflowing refrigerant is divided into a plurality of heat transfer tubes and flows out , an insertion member is inserted into the container.
By inserting, the heat transfer tube on the side farthest from the inflow pipe connection position is connected to the flow path cross-sectional area of the portion where the heat transfer tube on the side closest to the inflow pipe connection position in the container is connected. Heat transfer tube between the heat transfer tube closest to the inflow pipe connection position and the heat transfer tube most remote from the inflow pipe connection position in the container, The flow path cross-sectional area of the portion where is connected is smaller than the flow path cross-sectional area of the portion where the adjacent heat transfer tube is connected on the inflow pipe side, and of the portion where the adjacent heat transfer tube is connected on the anti-inflow pipe side. A flow divider characterized by having a flow path cross-sectional area or more. 2. A container having one end connected to an outflow pipe, and a plurality of heat transfer tubes connected in parallel to the container along a direction away from the outflow pipe connection position, wherein a plurality of heat transfer tubes are connected to the container. In the flow divider in which the refrigerant flowing into merges and flows out from the outflow pipe , the insertion member is inserted into the container.
By inserting, the heat transfer tube on the side farthest from the outlet pipe connection position is connected to the flow path cross-sectional area of the portion where the heat transfer tube closest to the outlet pipe connection position in the container is connected. Heat transfer tube between the heat transfer tube closest to the outlet pipe connection position and the heat transfer tube closest to the outlet tube connection position in the container, Is the flow path cross-sectional area of the part where
A flow splitter characterized in that the flow cross-sectional area is equal to or less than the flow path cross-sectional area of a portion where an adjacent heat transfer tube is connected on the outflow pipe side and is equal to or greater than the flow path cross-sectional area of a portion where an adjacent heat transfer tube is connected on the anti-outflow pipe side vessel.