JPWO2013172181A1 - Heat exchanger and refrigeration cycle apparatus - Google Patents

Abstract

The first fluid flow paths 3 arranged to be parallel to each other on the same plane and the second fluid flow paths 4 arranged on a plane parallel to the plane on which the first fluid flow paths 3 are arranged are combined. A pair of communication holes 5 extending in the direction perpendicular to the direction of the second fluid flow path 4 are formed at both ends of the second fluid flow path 4. And the second fluid flow path 4 is configured to communicate with each other, and is provided with an inlet conduit 6a coaxially connected to one communication hole 5 on the side surface of the heat transfer block 2, and includes one communication hole. The first fluid distribution mechanism 712 that partitions the inside of the spiral 5 and the first fluid distribution mechanism 712 at the end on the one communication hole 5 side of the inlet conduit 6a. A fluid distribution mechanism 711, and the end of the first fluid distribution mechanism 711 opposite to the one communication hole 5 is an inlet guide. 6a and in which it is divided parallel to the direction of gravity.

Description

  The present invention relates to a heat exchanger and a refrigeration cycle apparatus that perform heat exchange between a first fluid that is a high-temperature fluid and a second fluid that is a low-temperature fluid.

  Conventionally, a heat pump refrigeration / air-conditioning system including a vapor compression refrigeration circuit has been used. The refrigeration circuit includes a heat exchanger that exchanges heat between the first fluid and the second fluid. The first fluid is heated by the second fluid, and the cooled second fluid condenses. And a condenser for performing the evaporation, and the first fluid is cooled by the second fluid and the heated second fluid is evaporated. As this heat exchanger, there is a laminated plate heat exchanger in which a flow path for passing a first fluid and a flow path for a second fluid that exchanges heat with the first fluid are alternately formed by stacking plates.

  However, the laminated plate heat exchanger has a plurality of parallel flow paths, and when a two-phase refrigerant flows into the heat exchanger (for example, when used in an evaporator), the heat exchanger inflow portion In this case, the distribution of the refrigerant is biased such that the ratio of the gas and the liquid is shifted to each flow path. As described above, when the distribution of the refrigerant is biased, the heat transfer performance of the heat exchanger is deteriorated, so that a countermeasure for improving the bias of the distribution is required.

  In order to improve non-uniform distribution, a distribution pipe is provided as a refrigerant distribution means at the refrigerant inlet of the heat exchanger, and gas and liquid are evenly distributed to each flow path to improve the heat transfer performance of the heat exchanger. There exists a heat exchanger (for example, refer patent document 1).

JP-A-10-267586 (summary)

  In the heat exchanger of Patent Document 1, the heat exchange performance is improved by distributing the refrigerant equally to each flow path using a distribution pipe in the refrigerant distribution means. However, even when a distribution pipe is used in the structure of Patent Document 1, uneven distribution cannot be improved depending on the flow state of the refrigerant, and uneven distribution may occur. In this case, there has been a problem that the heat exchange performance may not be improved.

  The present invention has been made in view of such points, and heat exchange capable of suppressing the uneven distribution of the refrigerant and improving the heat transfer performance regardless of the flow state of the refrigerant flowing into the heat exchanger. An object is to provide a container and a refrigeration cycle apparatus.

  The heat exchanger according to the present invention includes a first fluid channel arranged to be parallel to each other on the same plane, and a second column arranged on a plane parallel to the plane on which the first fluid channel is arranged. A pair of layers with the fluid flow path is formed in the heat transfer block, and a pair of ends extending in a direction perpendicular to the direction of the second fluid flow path are provided at both ends of the second fluid flow path. An inlet conduit having a communication hole formed so that the second fluid flow path is in communication with each other and coaxially connected to one of the pair of communication holes on the side surface of the heat transfer block. , A second fluid distribution mechanism that spirally partitions the inside of one communication hole, and a first fluid that spirally partitions the interior of the inlet conduit and communicates with the second fluid distribution mechanism at one end of the inlet conduit on the side of the one communication hole And an end of the first fluid distribution mechanism opposite to the one communication hole is arranged so that the inlet conduit is aligned with the direction of gravity. It is one that is divided into.

  The heat exchanger according to the present invention is a heat exchanger capable of suppressing the uneven distribution of the refrigerant and improving the heat exchange performance by providing a fluid distribution mechanism in the inlet channel of the heat exchanger. Can be obtained.

It is a perspective view which shows typically the heat exchanger which concerns on Embodiment 1 of this invention. 2A is a cross-sectional view perpendicular to the longitudinal direction of FIG. 1 and is a longitudinal cross-sectional view cut at the communicating hole portion, and FIG. 2B is a vertical cross-sectional view parallel to the longitudinal direction of FIG. It is a principal part cross-sectional view cut | disconnected in the 2nd fluid flow-path part of the heat exchanger which concerns on Embodiment 1 of this invention. It is a perspective view which shows typically the heat exchanger comprised by the multiple layer which concerns on Embodiment 1 of this invention. It is a figure which shows the fluid distribution mechanism of FIG. It is a figure which shows the modification 1 of the fluid distribution mechanism of FIG. It is a figure which shows the modification 2 of the fluid distribution mechanism of FIG. It is a figure which shows the modification 3 of the fluid distribution mechanism of FIG. It is a principal part cross-sectional view of the entrance / exit of the inlet conduit part of the heat exchanger which concerns on Embodiment 1 of this invention. It is a principal part cross-sectional view which shows the flow state of the fluid in the inlet / outlet of the inlet conduit part of the heat exchanger which concerns on Embodiment 1 of this invention, and the inlet of an inlet communicating hole. It is a figure which shows the flow state of the fluid which flows in into the inlet nozzle of FIG. It is a block diagram of the apparatus which shows the heat pump type heating system explaining the refrigeration cycle apparatus which concerns on Embodiment 2 of this invention. It is a block diagram of the apparatus which shows the heat pump type hot-water supply system explaining the refrigeration cycle apparatus which concerns on Embodiment 3 of this invention.

Embodiment 1 FIG.
FIG. 1 is a perspective view schematically showing a heat exchanger according to Embodiment 1 of the present invention. 2A is a cross-sectional view perpendicular to the longitudinal direction of FIG. 1, and is a vertical cross-sectional view cut along the inlet communication hole and the inlet nozzle portion. FIG. 2B is a vertical cross-section parallel to the longitudinal direction of FIG. FIG. FIG. 3 is a cross-sectional view of the main part taken along the second fluid flow path part of FIG. In FIG. 1, the number of rows of the second fluid flow paths is smaller than that shown in FIGS. 2 and 3 because the configuration of the heat exchanger is illustrated in an easily understandable manner. In FIG. 1 and the drawings to be described later, the same reference numerals are the same or equivalent, and this is common throughout the entire specification. Furthermore, the forms of the constituent elements appearing in the entire specification are merely examples and are not limited to these descriptions.

  The heat exchanger 1 includes a heat transfer block 2, a first fluid flow path 3 (five rows in the example of FIG. 1), and a flow direction parallel to the first fluid flow path 3, and a second fluid flow path 4 ( In the example of FIG. 1, there is a configuration in which a layer (one layer in the example of FIG. 1) that forms a set of 13 columns and 2 rows) is formed. This configuration is formed by integral extrusion using a metal material such as aluminum.

  The both ends of the second fluid channel 4 of each layer extend in a direction orthogonal to the channel direction of the second fluid channel 4, and communicate with all of the plurality of rows of the second fluid channels 4 in the layer. A pair of communication holes 5 formed as described above are provided. Further, a conduit 6 is provided on the side of the heat transfer block 2 so as to be coaxial with the communication hole 5. Moreover, the 2nd fluid flow path 4 has penetrated the heat-transfer block 2 in the flow path direction, and the open end part is sealed with the lid | cover (not shown).

  The two conduits 6a and 6b are opened on the side surface 2a of the heat transfer block 2, and are connected to an external fluid circuit, and serve as an inlet for the fluid from the fluid circuit or an outlet for the fluid to flow out. Here, the conduit 6a at the end on the near side is referred to as an inlet conduit 6a, and the conduit 6b at the end on the far side is referred to as an outlet conduit 6b. The present heat exchanger 1 can be used by connecting the inlet conduit 6a and the outlet conduit 6b to piping of an external fluid circuit.

  In the heat exchanger 1 configured as described above, fluid flows from the external fluid circuit into the inlet conduit 6a in the direction of the arrow, and the second fluid channel 4 is connected to the communication hole (exit port) from the communication hole (inlet communication hole) 5a side. After flowing toward the communication hole 5b, the flow flows out from the outlet conduit 6b toward the external fluid circuit.

  In addition, the fluid distribution mechanism 7 that allows the fluid that has flowed in the two-phase state to flow into the second fluid flow path 4 is fitted or brazed into the inlet conduit 6a and the communication hole 5a that are located on the fluid inlet side of the second fluid flow path 4. It is provided by attaching.

The inlet conduit 6a located on the fluid inlet side of the second fluid channel 4 is provided with a first fluid distribution mechanism 711 that allows the fluid that has flowed in a two-phase state to flow into the communication hole 5a, and further, the second fluid channel 4 The second fluid distribution mechanism 712 that allows the fluid that has flowed in the two-phase state to flow into the second fluid flow path 4 is provided in the communication hole 5a that is located on the fluid inlet side.

The second fluid distribution mechanism 712 has a structure that partitions the inside of the communication hole 5a in a spiral shape. The first fluid distribution mechanism 711 connected to the second fluid distribution mechanism 712 at the end of the inlet conduit 6a on the side of the one communication hole 5 has an end of the first fluid distribution mechanism 711 on the opposite side to the communication hole 5. It has a structure that divides parallel to the direction of gravity.

(First fluid channel, second fluid channel)
The first fluid flow paths 3 are arranged in parallel to each other on the same plane, penetrate the heat transfer block 2 in the flow path direction, and have a circular cross section.
The second fluid channel 4 is arranged on a plane parallel to the plane on which the first fluid channel 3 is arranged so that the direction of the first fluid channel 3 and the flowing direction are parallel to each other. Presents.

  Here, the first fluid channel 3 is configured by a channel having a larger cross-sectional area than the second fluid channel 4, but the present invention is not limited to this, and each cross-sectional area is arbitrary. Can be set to

  Here, the first fluid channel 3 has a circular cross-sectional area and the second fluid channel 4 has a rectangular cross-sectional area. However, the present invention is not limited to this, and the respective cross-sections are not limited thereto. The shape can be set arbitrarily.

  In addition, here, the flow direction of the first fluid flow path 3 and the flow direction of the second fluid flow path are the same direction, but they are not necessarily the same direction.

In addition, here, the first fluid flow path 3 has five rows and the second fluid flow path 4 has 13 rows, but may be one row or a plurality of rows.

  In addition, here, the second fluid flow paths 4 are two rows, but may be one row or a plurality of rows. In addition, the number of layers of the first fluid channel 3 and the second fluid channel 4 is one layer here, but may be two or more layers.

FIG. 4 is a perspective view schematically showing a heat exchanger composed of a plurality of layers according to Embodiment 1 of the present invention.
In the heat exchanger 1 shown in FIG. 4, interlayer communication holes 51 that extend from the communication holes 5 in the stacking direction (vertical direction in FIG. 4) and communicate with the communication holes 5 having different layers are formed in one place. The two fluid channel 4 communicates. The connected flow path is a flow path that folds back in the heat transfer block 2, and a pair of communication holes 5 of adjacent layers in a plurality of layers are alternately positioned in one or the other of the pair of communication holes 5 in the stacking direction. The interlayer communication holes 51 are arranged to communicate with each other. The positions of the interlayer communication holes 51 in the plane direction orthogonal to the stacking direction are alternately set to one or the other of the both ends of the communication holes 5. In this description, the “alternate” portions are not substantially alternate in the case of two layers, but the gist of the idea is the same. Of all the communication holes 5, two communication holes that are not in direct communication with the interlayer communication hole 51 are opened to the side surface 2 a of the heat transfer block 2, and are used as inlets or outlets through which fluid flows in from the outside. That's fine. Similarly, in this configuration, the fluid distribution mechanism 7 (712) is disposed in the communication holes (inlet communication holes) 5a and 5c on the inlet side among the pair of communication holes 5 of each layer.

(Communication hole)
Since the communication hole 5 communicates the second fluid flow path 4 with each other, the communication hole 5 has a diameter capable of straddling the second fluid flow path 4.
The communication hole 5 is a hole drilled from one side surface 2a of the heat transfer block 2 by machining (drilling) or plastic working (punching). However, the present invention does not limit the formation method. Absent.
Although the communication hole 5 is circular here, the present invention is not limited to this.

(Fluid distribution mechanism)
FIG. 5 is a view showing the fluid distribution mechanism of FIG. FIG. 6 is a cross-sectional view of the main part of the entrance / exit of the entrance conduit portion of the heat exchanger according to Embodiment 1 of the present invention. FIG. 7 is a cross-sectional view of the main part showing the fluid flow state at the inlet / outlet of the inlet conduit portion and the inlet of the inlet communication hole of the heat exchanger according to Embodiment 1 of the present invention.
The first fluid distribution mechanism 711 has a flat plate twisted in a spiral. By inserting the first fluid distribution mechanism 711 into the inlet conduit 6a, two divided flow paths 8e and 8f are formed on the inlet side of the inlet conduit 6a as shown in FIG. 6A. Similarly, as shown in FIG. 6B, two divided flow paths 8e and 8f are formed on the outlet side of the inlet conduit 6a.

  As shown in FIG. 7A, the fluid in a two-phase state (for example, a wavy flow) flowing into the inlet conduit 6a is distributed to the two divided flow paths 8e and 8f when the inlet conduit 6a flows. Then, the fluid distributed to the two divided flow paths 8e and 8f flows spirally along the divided flow paths in the inlet conduit 6a, and the distribution shown in FIG. And flows into the communication hole 5a.

  The second fluid distribution mechanism 712 has a cross-shaped bar member twisted in a spiral shape. By inserting the second fluid distribution mechanism 712 into the communication hole 5a, four spiral divided flow paths 8a, 8b, 8c and 8d are formed in the communication hole 5a as shown in FIGS. Is done.

  The two-phase fluid that flows into the communication hole 5a from the inlet conduit 6a is distributed to the four divided flow paths 8a, 8b, 8c, and 8d that are partitioned by a cross as shown in FIG. 7C when the communication hole 5a flows. Is done. Then, it flows spirally along each divided flow path in the inlet communication hole 5a, and flows into the second fluid flow path 4 as shown by the arrow in FIG. 3 in the region facing the second fluid flow path 4.

  As described above, by inserting the first fluid distribution mechanism 711 and the second fluid distribution mechanism 712 into the inlet conduit 6a and the communication hole 5a, respectively, distribution by dividing the flow path into the second fluid flow path 4 becomes possible.

The first fluid distribution mechanism 711 has a structure in which the flow path at the inlet portion of the inlet conduit 6a is divided in parallel with the direction of gravity, and is connected to the second fluid distribution mechanism 712 at one end of the inlet conduit 6a on the one communication hole 5 side. . For this reason, the twist angle of the first fluid distribution mechanism 711 is determined by the insertion direction of the second fluid distribution mechanism 712.
The twist angle of the second fluid distribution mechanism 712 is determined so that all formed divided flow channels face the second fluid flow channel 4.

The structure of the 1st fluid distribution mechanism 711 and the 2nd fluid distribution mechanism 712 is not restricted to the structure shown in FIG. 5, You may comprise like FIG. 5A, FIG. 5B, and FIG. 5C below.

FIG. 5A is a diagram illustrating a first modification of the fluid distribution mechanism in FIG. 5.
In FIG. 5, the first fluid distribution mechanism 711 is a flat plate and the twist angle of the flat plate is 90 degrees. However, the twist angle of the flat plate is not limited to this, and may be 90 degrees or more, for example, as shown in FIG. 5A.
Yes.

FIG. 5B is a diagram illustrating a second modification of the fluid distribution mechanism in FIG. 5.
In FIG. 5, the cross-sectional shape of the second fluid distribution mechanism 712 is a cross-shaped cross-section and the spiral twist angle is 360 degrees, but the cross-sectional shape and the spiral twist angle are not limited thereto.

FIG. 5B is a diagram illustrating a third modification of the fluid distribution mechanism in FIG. 5.
In FIG. 5, the first fluid distribution mechanism 711 and the second fluid distribution mechanism 712 are configured separately, but may be configured integrally as shown in FIG. 5B. Thus, when the 1st fluid distribution mechanism 711 and the 2nd fluid distribution mechanism 712 are comprised integrally, a number of parts can be reduced and manufacture can be simplified.

  2 and the like show a configuration in which the fluid distribution mechanism 7 reaches the end portion of the communication hole 5a. However, the configuration is not necessarily limited to this configuration, and there may be a small gap without reaching. However, for the following reason, it is more preferable that there is no gap because the effect is higher when there is no gap. That is, the liquid refrigerant having a high density goes to the depth of the communication hole due to inertia. When the fluid distribution mechanism 7 reaches the end portion of the communication hole 5a and the end portion of the communication hole 5 is closed, there is no place for the liquid refrigerant, so that the liquid refrigerant flows from the predetermined divided flow path to the second fluid flow. It becomes easy to flow into the road 4. However, when the end portion is not closed, the liquid refrigerant is bypassed to the other divided flow path and easily flows into the second fluid flow path 4 in the vicinity of the end portion, and fluid division is not performed well.

(Flow state of two-phase refrigerant)
FIG. 8 is a cross-sectional view of the flow path showing the flow state of the refrigerant flowing into the inlet conduit of FIG. FIG. 8A is a cross-sectional view of an annular flow, and FIG. 8B is a cross-sectional view of a wavy flow. The flow state of the two-phase refrigerant can be broadly divided into an annular flow in which gas flows in the center of the flow path cross section and liquid flows in the vicinity of the pipe wall surface, and a wave flow in which gas flows in the upper section of the flow path and liquid flows in the lower section of the pipe Divided. The major features of these flows are that the former is unaffected by gravity and the latter is gravity-affected.

(Function and effect)
In the heat exchanger 1 configured as described above, the following effects can be obtained.
Since the first fluid distribution mechanism 711 and the second fluid distribution mechanism 712 are provided on the inflow side of the second fluid channel 4, the fluid that flows in the two-phase state in the second fluid channel 4 is divided into channels. Inflow. Thus, fluid drift in the second fluid flow path 4 can be suppressed. Therefore, the heat exchange performance between the second fluid flowing through the second fluid channel 4 and the first fluid flowing through the first fluid channel 3 can be improved.

In addition, since the first fluid distribution mechanism 711 whose end on the inflow side is configured to divide the inlet conduit 6a in parallel with the direction of gravity is provided on the inflow side of the second fluid flow path 4, it is in a two-phase state. In any flow state of the fluid that flows in, the fluid flows evenly. Thus, fluid drift in the second fluid flow path 4 can be suppressed. Therefore, heat exchange performance between the second fluid flowing through the second fluid flow path 4 and the first fluid flowing through the first fluid flow path 3 can be improved, and the heat exchanger can be used even under conditions of flowing in a wavy flow. Reliability in terms of performance can be ensured.

In the present invention, when the first fluid distribution mechanism 711 and the second fluid distribution mechanism 712 are configured separately, the twist angles of the first fluid distribution mechanism 711 and the second fluid distribution mechanism 712 are independently determined. Therefore, the flow path to the second fluid flow path 4 by the second fluid distribution mechanism 712 can be divided equally. Therefore, the heat exchange performance can be improved as compared with the one integrally formed.

Furthermore, although the conventional heat exchanger of Patent Document 1 has means for evenly distributing the refrigerant to each flow path, the heat exchanger is placed vertically (the heat transfer plate is installed vertically). It was necessary to limit to. That is, when the heat exchanger of Patent Document 1 is set horizontally, for example (with the heat transfer plate installed horizontally), in the flow path, the liquid flows in the lower part and the gas flows in the upper part based on the direction of gravity. This can cause knitting and can result in uneven distribution. On the other hand, in the present invention, since the first fluid distribution mechanism 711 and the second fluid distribution mechanism 712 are provided on the inflow side of the second fluid flow path 4, no drift in the flow path is caused. Therefore, the heat exchanger 1 of the present invention can be used without limiting the arrangement method.

Embodiment 2. FIG.
The second embodiment relates to a refrigeration cycle apparatus to which the heat exchanger 1 of the first embodiment is applied.
FIG. 9 illustrates a refrigeration cycle apparatus according to Embodiment 2 of the present invention, and is a configuration diagram of an apparatus showing a heat pump heating system that uses warm heat.
In FIG. 9, the heat pump heating system 20 is a heat exchange that performs heat exchange between the use-side fluid piping 21 through which the first fluid flows, the heat-source-side fluid piping 22 through which the second fluid flows, and the first fluid and the second fluid. And a container 1. That is, the first fluid flow path 3 of the heat exchanger 1 forms a part of the use side fluid pipe 21, and the second fluid flow path 4 of the heat exchanger 1 forms a part of the heat source side fluid pipe 22. Yes.

In the heat pump heating system 20, “water” is used as the first fluid and “R410A” is used as the second fluid.
The use side fluid pipe 21 sequentially connects the heat exchanger 1 (first fluid flow path 3), the pump 9, and the use side heat exchanger 10 to enable circulation of the first fluid.
The heat source side fluid piping 22 connects the compressor 11, the heat exchanger 1 (second fluid return channel 40), the expansion valve 12, the heat source side heat exchanger 13, and the fan 14 in order to circulate the second fluid. I have to.

  The first fluid in the usage-side fluid pipe 21 is heated in the heat exchanger 1 (receives heat from the second fluid), is sent out by the pump 9, and radiates heat in the usage-side heat exchanger 10 (to the usage-side fluid or the like). Hand over the heat). As the use-side heat exchanger 10, for example, a radiator or a floor heating heater is applied and used as a heating system.

  In the heat source side fluid piping 22, the second fluid that has become high temperature and high pressure in the compressor 11 exchanges heat with the first fluid in the heat exchanger 1 (delivering the heat). After that, the second fluid that has been decompressed by the expansion valve 12 and has become low temperature and pressure undergoes heat exchange (cold heat release) with the air blown by the fan 14 in the heat source side heat exchanger 13, and after evaporating, the compressor Return to 11.

  As shown in FIG. 9, a heating system using a conventional boiler as a heat source is obtained by heating or hot water supply using a heat pump hot water supply / heating system 20 using the heat exchanger 1 of the present invention as a heat source in the use side heat exchanger 10. Compared with energy saving effect.

  In the second embodiment, water is used as the fluid flowing through the first fluid flow path 3, and R410A is used as the fluid flowing through the second fluid flow path 4. The type of fluid is not limited to this, and water such as tap water, distilled water, and brine may be used as the first fluid. Moreover, you may use natural refrigerant | coolants, such as a CFC-type refrigerant | coolant, hydrocarbon, and mixtures thereof, as a 2nd fluid.

Embodiment 3 FIG.
The third embodiment relates to a refrigeration cycle apparatus to which the heat exchanger 1 of the first embodiment is applied.

FIG. 10 illustrates a refrigeration cycle apparatus according to Embodiment 3 of the present invention, and is a configuration diagram of an apparatus showing a heat pump hot water supply system that uses warm heat.
In FIG. 10, the heat pump hot water supply system 30 is a hot water supply system in which the use-side heat exchanger 10 in the heat pump heating system 20 is installed in the tank 15 and the water supplied to the tank 15 is heated to take water. is there.

  As shown in FIG. 10, the heat pump type hot water supply system 30 using the heat exchanger 1 of the present invention is used as a heat source for heating or hot water supply in the use side heat exchanger 10, thereby comparing with a conventional hot water supply system using a boiler as a heat source. Energy saving effect.

  DESCRIPTION OF SYMBOLS 1 Heat exchanger, 2 Heat transfer block, 2a Side surface, 3rd fluid flow path, 4th fluid flow path, 4A Upper layer side 2nd fluid flow path, 4B Lower layer side 2nd fluid flow path, 5 Communication hole, 5a Communication hole (inlet communication hole), 5b Communication hole (outlet communication hole), 5c Communication hole (inlet communication hole), 5d Communication hole (exit communication hole), 6 nozzle, 6a Inlet nozzle, 6b Outlet nozzle, 7 Fluid distribution mechanism 711, first fluid distribution mechanism, 712 second fluid distribution mechanism, 8a to f, divided flow path, 9 pump, 10 utilization side heat exchanger, 11 compressor, 12 expansion valve, 13 heat source side heat exchanger, 14 fan, DESCRIPTION OF SYMBOLS 15 Tank, 20 Heat pump type heating system, 21 Use side fluid piping, 22 Heat source side fluid piping, 30 Heat pump type hot water supply system, 40 2nd fluid return flow path.

The heat exchanger according to the present invention includes a first fluid channel arranged to be parallel to each other on the same plane, and a second column arranged on a plane parallel to the plane on which the first fluid channel is arranged. A pair of layers with the fluid flow path is formed in the heat transfer block, and a pair of ends extending in a direction perpendicular to the direction of the second fluid flow path are provided at both ends of the second fluid flow path. An inlet conduit having a communication hole formed so that the second fluid flow path is in communication with each other and coaxially connected to one of the pair of communication holes on the side surface of the heat transfer block. , A second fluid distribution mechanism that spirally partitions the inside of one communication hole, and a first fluid that spirally partitions the interior of the inlet conduit and communicates with the second fluid distribution mechanism at one end of the inlet conduit on the side of the one communication hole It has a distribution mechanism, the first fluid distribution mechanism and the second fluid distribution mechanism are formed separately, and one of the communication holes End pair of the first fluid distribution mechanism, which divides the inlet conduit in parallel with the direction of gravity, and both the direction of gravity than the first fluid distribution mechanism and the second fluid distribution mechanism at the end of one of the communication hole side They are connected by partitions that divide vertically .

Claims (8)

A set of first fluid channels arranged in parallel to each other on the same plane and second fluid channels arranged on a plane parallel to the plane on which the first fluid channels are arranged A layer to be formed in the heat transfer block,
A pair of communication holes extending in a direction orthogonal to the direction of the second fluid flow path is formed at both ends of the second fluid flow path, and the second fluid flow path is configured to communicate with each other. An inlet conduit coaxially connected to one communication hole of the pair of communication holes on a side surface of the heat transfer block;
A second fluid distribution mechanism that spirally partitions the inside of the one communication hole;
A first fluid distribution mechanism that spirally partitions the interior of the inlet conduit and communicates with the second fluid distribution mechanism at an end of the inlet conduit on the one communication hole side;
The heat exchanger in which the end of the first fluid distribution mechanism opposite to the one communication hole divides the inlet conduit in parallel with the direction of gravity.   2. The heat exchange according to claim 1, wherein the first fluid distribution mechanism has a spiral shape that is twisted so that a surface rotates by 90 degrees or more from an opposite side to the one communication hole to an end on the one communication hole side. vessel. The second fluid distribution mechanism includes a structure in which two spiral surfaces intersect perpendicularly to divide the inside of the one communication hole into four spirals, and the second fluid distribution mechanism at an end on the one communication hole side The heat exchanger according to claim 1 or 2, wherein one of the two spiral surfaces of the first fluid distribution surface and the partition surface of the first fluid distribution mechanism are continuous.   The heat exchanger according to any one of claims 1 to 3, wherein the first fluid distribution mechanism and the second fluid distribution mechanism are integrally formed.   The first fluid distribution mechanism and the second fluid distribution mechanism are formed separately, and both the first fluid distribution mechanism and the second fluid distribution mechanism are perpendicular to the direction of gravity at the end on the one communication hole side. The heat exchanger as described in any one of Claims 1-3 connected by the partition divided | segmented into. The heat exchanger according to claim 5, wherein the twist angle of the spiral of the first fluid distribution mechanism is different from the twist angle of the spiral of the second fluid distribution mechanism. A plurality of rows of first fluid flow paths arranged in parallel with each other on the same plane, and a plurality of rows of second fluid flows arranged on a plane parallel to the plane on which the first fluid flow paths are arranged The layer having a set of paths has a configuration in which a plurality of layers are formed in the heat transfer block,
The plurality of rows of first fluid flow paths are formed through the heat transfer block,
In each of the layers, a pair of communication holes extending in a direction orthogonal to the direction of the second fluid flow path are formed at both ends of the plurality of rows of the second fluid flow paths, and the plurality of rows of the second fluid flow paths of the layers are formed. All the fluid flow paths are configured to communicate with each other, and the pair of communication holes of adjacent layers in the plurality of layers are arranged so as to be alternately positioned in one or the other of the pair of communication holes in the stacking direction. The communication holes communicate with each other, and the positions of the interlayer communication holes in the plane direction orthogonal to the stacking direction are alternately arranged at one or the other of both ends of the communication holes, and among all the communication holes, The two communication holes that are not in direct communication with the interlayer communication holes are openings at the side surfaces of the heat transfer block and serve as inlets or outlets through which fluid flows from the outside, thereby communicating from the inlets to the outlets. Second flow Turning flow path is formed,
Of the communication holes in the second fluid return channel, each of the inlet communication holes, which are communication holes located on the fluid inlet side in the second fluid channel of each of the layers, is an inner part of its own inlet communication hole. A heat exchanger having a second fluid distribution mechanism for partitioning the chamber in a spiral shape. The heat exchange is performed between the first-side fluid and the second-side fluid piping through which the first fluid flows, the heat-source-side fluid piping through which the second fluid flows, and the first fluid and the second fluid. A heat exchanger as described
The usage-side fluid piping sequentially connects the first fluid flow path of the heat exchanger, the pump that sends out the first fluid, and the usage-side heat exchanger, and enables circulation of the first fluid.
The heat source side fluid pipe sequentially connects the compressor that compresses the second fluid of the heat exchanger, the second fluid flow path, the expansion valve, and the heat source side heat exchanger to enable circulation of the second fluid. A refrigeration cycle apparatus characterized by comprising:

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