Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
  • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
  • F28D9/0006—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the plate-like or laminated conduits being enclosed within a pressure vessel
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
  • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
  • F25B39/00—Evaporators; Condensers
  • F25B39/02—Evaporators
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
  • F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
  • F28F13/06—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
  • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
  • F28F3/08—Elements constructed for building-up into stacks, e.g. capable of being taken apart for cleaning
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
  • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
  • F25B2339/00—Details of evaporators; Details of condensers
  • F25B2339/02—Details of evaporators
  • F25B2339/024—Evaporators with refrigerant in a vessel in which is situated a heat exchanger
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
  • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
  • F25B2339/00—Details of evaporators; Details of condensers
  • F25B2339/02—Details of evaporators
  • F25B2339/024—Evaporators with refrigerant in a vessel in which is situated a heat exchanger
  • F25B2339/0241—Evaporators with refrigerant in a vessel in which is situated a heat exchanger having plate-like elements

Definitions

• This disclosure relates to a shell-and-plate heat exchanger and a refrigeration system.
• Patent Document 1 discloses an evaporator that includes a pressure vessel into which a refrigerant flows, a number of heat transfer tube support plates spaced apart along the longitudinal axis of the pressure vessel, and a group of heat transfer tubes that penetrate the heat transfer tube support plates.
• the purpose of this disclosure is to increase the heat exchange efficiency of the entire plate stack.
• the first aspect of the present disclosure is a shell-and-plate type heat exchanger comprising a shell (11) having an internal space (15), and a plate stack (30) having a plurality of heat transfer plates (40) stacked and joined to one another and housed in the internal space (15), and exchanging heat between a refrigerant flowing into the internal space (15) of the shell (11) and a heat medium flowing into a heat medium flow path (32) of the plate stack (30), the shell (11) being provided at the bottom and allowing the refrigerant to flow into the internal space (15), and a refrigerant inlet (21) being disposed between the plate stack (30) and the refrigerant inlet (21) and configured to be connected to the plate stack (30) and having a thickness of 100 mm.
• the partition member (5) has a plurality of communication holes (50) that open toward the plate stack (30) at positions facing the central heat exchange section (35), the first heat exchange section (36), and the second heat exchange section (37).
• the partition member (5) reduces the variation in the amount of refrigerant flowing in the first direction, thereby improving the heat exchange efficiency of the plate stack (30) as a whole.
• a second aspect of the present disclosure is a shell-and-plate type heat exchanger according to the first aspect, wherein the partition member (5) has a first partition plate (61) extending along the first direction, and below the first partition plate (61) is provided an internal flow path (55) through which the refrigerant flowing in from the refrigerant inlet (21) flows, and the internal flow path (55) extends along the first direction and has a first flow path (56) that guides the refrigerant flowing in from the refrigerant inlet (21) to a position below the first heat exchange section (36) and the second heat exchange section (37), and and a second flow path (57) that is turned back at the end of the first flow path (56) in the first direction and guides the refrigerant that has passed through the first flow path (56) to a position below the central heat exchange section (35).
• the partition member (5) has a first partition plate (61) extending along the first direction, and below the first partition plate (61) is provided an internal flow path (55) through which the refrigerant flowing in from the ref
• the communication hole (50) includes a first communication hole (58) that is provided in the first partition plate (61), communicates with the first flow path (56) and opens toward the plate stack (30), and a second communication hole (59) that is provided in the first partition plate (61), communicates with the second flow path (57), and opens toward the plate stack (30).
• the refrigerant flowing in from the refrigerant inlet (21) is guided to a position below the first heat exchange section (36) and the second heat exchange section (37) via the first flow path (56), and the refrigerant that has passed through the first flow path (56) is guided to a position below the central heat exchange section (35), thereby reducing the variation in the amount of refrigerant flowing in the first direction.
• a third aspect of the present disclosure is a shell-and-plate type heat exchanger according to the first aspect, wherein the partition member (5) has a first partition plate (61) extending along the first direction, and a second partition plate (62) disposed below the first partition plate (61) and extending along the first direction, the downstream end of the refrigerant inlet (21) is connected to the second partition plate (62), and a space is provided between the first partition plate (61) and the second partition plate (62).
• An internal flow path (55) is provided through which the refrigerant flowing in from the refrigerant inlet (21) flows, and the communication hole (50) is provided in the first partition plate (61) and includes a first communication hole (68) that communicates with the internal flow path (55) and opens toward the plate stack (30), and the second partition plate (62) is provided with a plurality of second communication holes (69) that communicate with the internal flow path (55) and open to the opposite side to the plate stack (30).
• the refrigerant flowing in from the refrigerant inlet (21) is guided to a position below the first heat exchange section (36) and the second heat exchange section (37) via the internal flow path (55), and the gas refrigerant flows out from the first communication hole (68) and the liquid refrigerant flows out from the second communication hole (69), thereby reducing the variation in the amount of refrigerant flowing in the first direction.
• the fourth aspect of the present disclosure is a shell-and-plate type heat exchanger according to the first aspect, in which the partition member (5) has a first partition plate (61) extending along the first direction, and below the first partition plate (61) is provided an internal flow path (55) through which the refrigerant flowing in from the refrigerant inlet (21) flows, and the communication hole (50) is provided in the first partition plate (61), communicates with the internal flow path (55) and opens toward the plate stack (30), and includes a stirring member (82) disposed in the internal flow path (55) for stirring the liquid refrigerant and gas refrigerant contained in the refrigerant.
• the liquid refrigerant and gas refrigerant contained in the refrigerant that flows in from the refrigerant inlet (21) are circulated in the first direction, the liquid refrigerant and gas refrigerant are stirred by the stirring member (82), thereby reducing the variation in the ratio of liquid refrigerant to gas refrigerant in the first direction.
• a fifth aspect of the present disclosure is a shell-and-plate type heat exchanger according to the first aspect, wherein the partition member (5) has a first partition plate (61) extending along the first direction, and a second partition plate (62) disposed below the first partition plate (61) and extending along the first direction, and an upper flow path (76) is provided between the first partition plate (61) and the second partition plate (62), and the second partition plate (62) is disposed between the first partition plate (61) and the second partition plate (62).
• a lower flow path (77) is provided through which the refrigerant flowing in from the refrigerant inlet (21) flows, and the communication holes (50) are provided in the first partition plate (61) and include an upper communication hole (78) that communicates with the upper flow path (76) and opens toward the plate stack (30), and the second partition plate (62) is provided with a plurality of lower communication holes (79) that communicate with the upper flow path (76) and the lower flow path (77).
• the refrigerant flowing in from the refrigerant inlet (21) is circulated in the first direction by the lower flow path (77), and then guided to a position below the first heat exchange section (36) and the second heat exchange section (37) by the upper flow path (76). This allows the liquid refrigerant and gas refrigerant contained in the refrigerant to be mixed, and also reduces the variation in the amount of refrigerant flowing in the first direction.
• the sixth aspect of the present disclosure is a shell-and-plate type heat exchanger according to any one of the first to fifth aspects, in which the variation between the dryness of the refrigerant heat-exchanged in the central heat exchange section (35) and the dryness of the refrigerant heat-exchanged in the first heat exchange section (36) and the second heat exchange section (37) is 70% or less, and the variation between the mass flow rate of the liquid refrigerant heat-exchanged in the central heat exchange section (35) and the mass flow rate of the liquid refrigerant heat-exchanged in the first heat exchange section (36) and the second heat exchange section (37) is 30% or less.
• the heat exchange efficiency of the plate stack (30) as a whole can be improved by appropriately setting the dryness of the refrigerant and the mass flow rate of the liquid refrigerant in the first direction.
• the seventh aspect of the present disclosure is a shell-and-plate type heat exchanger according to the sixth aspect, in which the variation between the dryness of the refrigerant heat-exchanged in the central heat exchange section (35) and the dryness of the refrigerant heat-exchanged in the first heat exchange section (36) and the second heat exchange section (37) is 40% or less, and the variation between the mass flow rate of the liquid refrigerant heat-exchanged in the central heat exchange section (35) and the mass flow rate of the liquid refrigerant heat-exchanged in the first heat exchange section (36) and the second heat exchange section (37) is 20% or less.
• the heat exchange efficiency of the plate stack (30) as a whole can be improved by appropriately setting the dryness of the refrigerant and the mass flow rate of the liquid refrigerant in the first direction.
• the eighth aspect of the present disclosure is a shell-and-plate heat exchanger according to any one of the first to seventh aspects, in which the refrigerant inlet (21) is provided at a central position in the first direction at the bottom of the shell (11).
• the refrigerant that flows from the refrigerant inlet (21) into the internal space (15) can be evenly distributed toward both ends in the first direction.
• the ninth aspect of the present disclosure is a shell-and-plate heat exchanger according to any one of the first to seventh aspects, in which the refrigerant inlet (21) is provided at a position shifted in the first direction from the center position in the first direction at the bottom of the shell (11).
• the refrigerant inlet (21) is provided at a position shifted in the first direction from the center position in the first direction, so that the refrigerant inlet (21) can be positioned at any position.
• the tenth aspect of the present disclosure is a shell-and-plate heat exchanger according to any one of the first to ninth aspects, in which the hole diameter d1 of the communication hole (50) closest to the refrigerant inlet (21) and the hole diameter d2 of the communication hole (50) farthest from the refrigerant inlet (21) satisfy the condition d1 ⁇ d2.
• the hole diameter of the communication hole (50) is set so that the refrigerant easily flows to the communication hole (50) located far from the refrigerant inlet (21), thereby suppressing the variation in the amount of refrigerant distributed.
• An eleventh aspect of the present disclosure is a shell-and-plate heat exchanger according to any one of the first to fourth aspects, wherein the partition member (5) has a first partition plate (61) extending along the first direction, the refrigerant inlet (21) is provided at a position shifted in the first direction from a central position in the first direction at the lower part of the shell (11), one end of the first partition plate (61) in the first direction is a first end (91) and the other end is a second end (92), and a length from the refrigerant inlet (21) to the first end (91) is is longer than the distance from the refrigerant inlet (21) to the second end (92), and when viewed in the thickness direction of the first partition plate (61), the first region is the side of the first end (91) from the refrigerant inlet (21) of the first partition plate (61), and the second region is the side of the second end (92) from the refrigerant inlet (21).
• the hole diameter d3 of the communication hole is the hole diameter d
• the hole diameters of the communication holes (50) in the first and second regions are set so that the refrigerant can easily flow through the communication holes (50) in the first region, which is located a long distance from the refrigerant inlet (21) in the first partition plate (61), thereby reducing variation in the amount of refrigerant distributed.
• a twelfth aspect of the present disclosure is a shell-and-plate heat exchanger according to the fifth aspect, wherein the refrigerant inlet (21) is provided at a position shifted in the stacking direction from the center position in the first direction at the lower part of the shell (11), one end of the second partition plate (62) in the first direction is designated as a first end (91) and the other end is designated as a second end (92), and the distance from the refrigerant inlet (21) to the first end (91) is set to 100 mm from the refrigerant inlet (21) to the second end (92).
• the first region is the side of the first end (91) of the second partition plate (62) from the refrigerant inlet (21), and the second region is the side of the second end (92) from the refrigerant inlet (21), and among the multiple lower communication holes (79), the hole diameter d5 of the lower communication hole (79) formed in the first region and the hole diameter d6 of the lower communication hole (79) formed in the second region satisfy the condition d5>d6.
• the hole diameters of the lower communication holes (79) in the first and second regions are set so that the refrigerant can easily flow through the lower communication holes (79) in the first region, which is located a long distance from the refrigerant inlet (21) in the second partition plate (62), thereby reducing variation in the amount of refrigerant distributed.
• the thirteenth aspect of the present disclosure is a shell-and-plate heat exchanger according to the second aspect, in which the refrigerant inlet (21) is provided at a position shifted in the first direction from the center position in the first direction at the lower part of the shell (11), one end of the first partition plate (61) in the first direction is a first end (91), and the other end is a second end (92), the distance from the refrigerant inlet (21) to the first end (91) is longer than the distance from the refrigerant inlet (21) to the second end (92), the first region is a side of the first flow path (56) from the refrigerant inlet (21) to the first end (91), and the second region is a side of the second flow path (56) from the refrigerant inlet (21) to the second end (92), as viewed in the thickness direction of the first partition plate (61), and the flow path width L1 of the first region and the flow path width L2 of the second region satisfy the condition L1>L2.
• the flow path widths of the first and second regions are set so that the refrigerant flows easily through the first region, which is located a long distance from the refrigerant inlet (21) in the first flow path (56), thereby reducing variation in the amount of refrigerant distributed.
• a fourteenth aspect of the present disclosure is a refrigeration system including a shell-and-plate heat exchanger (10) according to any one of the first to thirteenth aspects, and a refrigerant circuit (1a) through which a refrigerant flows to be subjected to heat exchange in the shell-and-plate heat exchanger (10).
• a refrigeration system equipped with a shell-and-plate heat exchanger (10) can be provided.
• FIG. 1 is a refrigerant circuit diagram showing the configuration of a refrigeration device according to the first embodiment.
• FIG. 2 is a side cross-sectional view showing the configuration of a shell-and-plate heat exchanger.
• FIG. 3 is a front cross-sectional view showing the configuration of a shell-and-plate heat exchanger.
• FIG. 4 is a side cross-sectional view showing the configuration of the plate stack.
• FIG. 5 is a plan view showing the configuration of the partition member.
• FIG. 6 is a cross-sectional view taken along line AA of FIG.
• FIG. 7 is a side cross-sectional view showing the configuration of a shell-and-plate heat exchanger according to the second embodiment.
• FIG. 1 is a refrigerant circuit diagram showing the configuration of a refrigeration device according to the first embodiment.
• FIG. 2 is a side cross-sectional view showing the configuration of a shell-and-plate heat exchanger.
• FIG. 3 is a front cross-sectional view showing the configuration of
• FIG. 8 is a front cross-sectional view showing the configuration of a shell-and-plate heat exchanger.
• FIG. 9 is a cross-sectional view taken along line B1-B1 of FIG.
• FIG. 10 is a cross-sectional view taken along line B2-B2 of FIG.
• FIG. 11 is a view corresponding to FIG. 9 of a partition member according to a modified example of the second embodiment.
• FIG. 12 is a view corresponding to FIG. 10 of a partition member according to a modified example of the second embodiment.
• FIG. 13 is a side cross-sectional view showing the configuration of a shell-and-plate heat exchanger according to the third embodiment.
• FIG. 14 is a front cross-sectional view showing the configuration of a shell-and-plate heat exchanger.
• FIG. 15 is a cross-sectional view taken along the line C1-C1 of FIG. 16 is a cross-sectional view taken along the line C2-C2 of FIG. 17 is a cross-sectional view taken along line C3-C3 of FIG. 13.
• FIG. 18 is a side cross-sectional view showing the configuration of a shell-and-plate heat exchanger according to the fourth embodiment.
• FIG. 19 is a front cross-sectional view showing the configuration of a shell-and-plate heat exchanger.
• FIG. 20 is a cross-sectional view taken along the line DD in FIG.
• FIG. 21 is a plan view showing the configuration of a partition member according to the fifth embodiment.
• FIG. 22 is a cross-sectional plan view showing the position of the refrigerant inlet.
• FIG. 23 is a plan view showing the configuration of a partition member according to the sixth embodiment.
• FIG. 24 is a cross-sectional plan view showing the position of the refrigerant inlet.
• FIG. 25 is a plan view showing the configuration of the partition member according to the seventh embodiment.
• FIG. 26 is a cross-sectional plan view showing the position of the refrigerant inlet.
• FIG. 27 is a plan view showing the configuration of a partition member according to the eighth embodiment.
• FIG. 28 is a cross-sectional plan view showing the position of the refrigerant inlet.
• FIG. 29 is a plan view showing the configuration of a partition member according to the ninth embodiment.
• a shell-and-plate heat exchanger (10) (hereinafter referred to as a "heat exchanger") is provided in a refrigeration system (1).
• the refrigeration system (1) has a refrigerant circuit (1a) filled with a refrigerant.
• the refrigerant circuit (1a) has a compressor (2), a radiator (3), a pressure reduction mechanism (4), and a heat exchanger (10) serving as an evaporator.
• the pressure reduction mechanism (4) is, for example, an expansion valve.
• the refrigerant circuit (1a) performs a vapor compression refrigeration cycle.
• the refrigeration system (1) is an air conditioning system.
• the air conditioning system may be a cooling-only system, a heating-only system, or an air conditioning system that switches between cooling and heating.
• the air conditioning system has a switching mechanism (e.g., a four-way switching valve) that switches the refrigerant circulation direction.
• the refrigeration system (1) may be a water heater, a chiller unit, a cooling system that cools the air inside a storage unit, etc.
• a cooling system cools the air inside a refrigerator, a freezer, a container, etc.
• the heat exchanger (10) includes a shell (11) and a plate stack (30).
• the plate stack (30) is housed in the internal space (15) of the shell (11).
• a refrigerant flows into the internal space (15) of the shell (11).
• the refrigerant includes a gas refrigerant and a liquid refrigerant.
• the refrigerant exchanges heat with a heat medium flowing through the plate stack (30).
• the heat exchanger (10) functions as an evaporator by evaporating the refrigerant that flows into the internal space (15) of the shell (11).
• water or brine is used as the heat medium.
• the shell (11) has a tubular body (12), a first closing member (13), and a second closing member (14).
• the tubular body (12) is formed of a cylindrical member that extends horizontally and is open at both axial ends.
• the first blocking member (13) is composed of a disk-shaped member.
• the first blocking member (13) blocks the opening at one end side (the left end side in FIG. 2) of the cylindrical body (12).
• the first blocking member (13) is attached to the cylindrical body (12) by welding.
• the second blocking member (14) is composed of a disk-shaped member.
• the second blocking member (14) blocks the opening at the other end side (the right end side in FIG. 2) of the cylindrical body (12).
• the second blocking member (14) is attached to the cylindrical body (12) by welding.
• the shell (11) defines an internal space (15) by the cylindrical body (12), the first closing member (13), and the second closing member (14). Liquid refrigerant is stored in the internal space (15).
• the internal space (15) contains a plate stack (30).
• the cylindrical body (12) is provided with a refrigerant inlet (21) and a refrigerant outlet (22).
• the refrigerant inlet (21) is provided at the bottom of the cylindrical body (12).
• the refrigerant is introduced into the internal space (15) through the refrigerant inlet (21).
• the refrigerant inlet (21) is provided at the center of the lower part of the shell (11) in the stacking direction of the plate stack (30).
• the refrigerant outlet (22) is provided at the top of the cylindrical body (12).
• the refrigerant evaporated in the internal space (15) is discharged from the refrigerant outlet (22) to the outside of the shell (11).
• the refrigerant inlet (21) and the refrigerant outlet (22) are connected to the refrigerant circuit (1a).
• the first blocking member (13) is provided with a heat medium inlet (23) and a heat medium outlet (24).
• the heat medium inlet (23) and the heat medium outlet (24) are tubular members.
• the heat medium inlet (23) penetrates the first blocking member (13).
• the heat medium inlet (23) is connected to the heat medium introduction passage (33) of the plate stack (30).
• the heat medium inlet (23) supplies the heat medium to the plate stack (30). Heat exchange occurs between the refrigerant that has flowed into the internal space (15) of the shell (11) and the heat medium that has flowed into a heat medium flow passage (32) of the plate stack (30) described below.
• the heat medium outlet (24) penetrates the first blocking member (13) at a position above the heat medium inlet (23).
• the heat medium outlet (24) is connected to the heat medium discharge path (34) of the plate stack (30).
• the heat medium outlet (24) discharges the heat medium from the plate stack (30).
• the plate stack (30) has a plurality of heat transfer plates (40) that are stacked and joined together.
• the plate stack (30) is accommodated in the internal space (15) of the shell (11) with the stacking direction of the heat transfer plates (40) oriented horizontally.
• the stacking direction of the plate stack (30) is referred to as a first direction.
• the heat transfer plate (40) includes a first plate (40a) and a second plate (40b).
• the first plates (40a) and the second plates (40b) are stacked alternately.
• the left side of the first plate (40a) and the second plate (40b) in FIG. 4 will be referred to as the front side
• the right side of the first plate (40a) and the second plate (40b) in FIG. 5 will be referred to as the back side.
• the first plate (40a) has an inlet protrusion (41a) and an outlet protrusion (43a).
• the inlet protrusion (41a) and the outlet protrusion (43a) are disposed on one side of the first plate (40a). It is formed by bulging the part toward the surface.
• the inlet protrusion (41a) is formed in the lower part of the first plate (40a).
• the first inlet hole (42a) is formed in the center of the inlet protrusion (41a).
• the first inlet hole (42a) is a circular hole that penetrates the first plate (40a) in the thickness direction.
• the outlet protrusion (43a) is formed on the upper part of the first plate (40a).
• the outlet protrusion (43a) has a first outlet hole (44a) formed in the center thereof.
• the first outlet hole (44a) is a circular hole that penetrates the first plate (40a) in the thickness direction.
• the second plate (40b) has an inlet recess (41b) and an outlet recess (43b).
• the inlet recess (41b) and the outlet recess (43b) are formed by bulging a part of the second plate (40b) toward the back surface side.
• the inlet recess (41b) is formed in the lower part of the second plate (40b).
• the second inlet hole (42b) is formed in the center of the inlet recess (41b).
• the second inlet hole (42b) is a circular hole that penetrates the second plate (40b) in the thickness direction.
• the inlet recess (41b) is formed at a position corresponding to the inlet protrusion (41a) of the first plate (40a).
• the second inlet hole (42b) is formed at a position corresponding to the first inlet hole (42a) of the first plate (40a).
• the outlet recess (43b) is formed in the upper part of the second plate (40b).
• the second outlet hole (44b) is formed in the center of the outlet recess (43b).
• the second outlet hole (44b) is a circular hole penetrating the second plate (40b) in the thickness direction.
• the outlet recess (43b) is formed at a position corresponding to the outlet protrusion (43a) of the first plate (40a).
• the second outlet hole (44b) is formed at a position corresponding to the first outlet hole (44a) of the first plate (40a).
• the peripheral portion of the first plate (40a) and the peripheral portion of the second plate (40b) adjacent to the back side of the first plate (40a) are joined by welding around the entire circumference. They may also be joined by brazing.
• the first inlet hole (42a) of the first plate (40a) overlaps with the second inlet hole (42b) of the second plate (40b) adjacent to the front surface side of the first plate (40a).
• the edges of the overlapping first inlet hole (42a) and second inlet hole (42b) are joined by welding around the entire circumference. They may also be joined by brazing.
• the first inlet hole (42a) and second inlet hole (42b) communicate with the heat medium flow path (32) described later and introduce the heat medium into the heat medium flow path (32).
• the first outlet hole (44a) of the first plate (40a) overlaps with the second outlet hole (44b) of the second plate (40b) adjacent to the front surface side of the first plate (40a).
• the edges of the overlapping first outlet hole (44a) and second outlet hole (44b) are joined by welding around the entire circumference. They may also be joined by brazing.
• the first outlet hole (44a) and second outlet hole (44b) communicate with the heat medium flow path (32) described later and lead out the heat medium from the heat medium flow path (32).
• the heat medium introduction passage (33) is formed by the inlet protrusion (41a) and the first inlet hole (42a) of the first plate (40a) and the inlet recess (41b) and the second inlet hole (42b) of the second plate (40b).
• the outlet protrusion (43a) and the first outlet hole (44a) of the first plate (40a) and the outlet recess (43b) and the second outlet hole (44b) of the second plate (40b) form a heat medium outlet passage (34).
• the heat medium inlet passage (33) is a passage that extends in the stacking direction of the heat transfer plates (40) in the plate stack (30).
• the heat medium inlet passage (33) is a passage that is isolated from the internal space (15) of the shell (11) and connects all the heat medium flow paths (32) to the heat medium inlet (23).
• the heat medium outlet path (34) is a passage that extends in the stacking direction of the heat transfer plates (40) in the plate stack (30).
• the heat medium outlet path (34) is a passage that is isolated from the internal space (15) of the shell (11) and connects all the heat medium flow paths (32) to the heat medium outlet (24).
• the plate stack (30) has a refrigerant flow path (31) and a heat medium flow path (32).
• a plurality of refrigerant flow paths (31) and a plurality of heat medium flow paths (32) are formed with a heat transfer plate (40) therebetween.
• the refrigerant flow paths (31) and the heat medium flow paths (32) are separated from each other by the heat transfer plate (40).
• the first plate (40a) and the second plate (40b) each have repeated elongated ridge-like projections and recesses.
• the first plate (40a) has first front side protrusions (45a) and first back side protrusions (47a) arranged alternately.
• the first front side protrusions (45a) bulge out toward the front side of the first plate (40a).
• the first back side protrusions (47a) bulge out toward the back side of the first plate (40a).
• the second plate (40b) has second front side protrusions (47b) and second back side protrusions (45b) arranged alternately.
• the second front side protrusions (47b) bulge out toward the front side of the second plate (40b).
• the second back side protrusions (45b) bulge out toward the back side of the second plate (40b).
• the refrigerant flow path (31) is a flow path sandwiched between the front surface of the first plate (40a) and the back surface of the second plate (40b).
• the refrigerant flow path (31) is a flow path through which the refrigerant flows, communicating with the internal space (15) of the shell (11).
• the refrigerant flow path (31) includes a flow path formed between the front surface of the first rear side convex portion (47a) and the rear surface of the second front side convex portion (47b), and a space formed between the first front side convex portion (45a) and the second rear side convex portion (45b).
• the heat medium flow path (32) is a flow path sandwiched between the back surface of the first plate (40a) and the front surface of the second plate (40b).
• the heat medium flow path (32) is a flow path through which the heat medium flows, isolated from the internal space (15) of the shell (11).
• the heat medium flow path (32) includes a flow path formed between the back surface of the first front side convex portion (45a) and the front surface of the second back side convex portion (45b), and a space formed between the first back side convex portion (47a) and the second front side convex portion (47b).
• the heat medium flows into the heat medium inlet (23) through the heat medium inlet passage (33).
• the heat medium flowing through the heat medium inlet passage (33) flows through the heat medium flow passage (32) from the first inlet hole (42a) and the second inlet hole (42b) toward the first outlet hole (44a) and the second outlet hole (44b).
• the heat medium flowing through the heat medium introduction passage (33) flows into the heat medium flow path (32). While flowing through the heat medium flow path (32), the heat medium passes through the space formed between the first back side protrusion (47a) and the second front side protrusion (47b) and flows into the heat medium flow path (32) adjacent to the upper side of the heat medium flow path (32). In this way, the heat medium flows upward while flowing over both side ends of the heat transfer plate (40).
• the refrigerant that has passed through the pressure reducing mechanism (4) flows toward the heat exchanger (10).
• the liquid refrigerant flows into the internal space (15) of the shell (11) from the refrigerant inlet (21).
• the liquid refrigerant is stored up to near the upper end of the plate stack (30).
• the plate stack (30) is immersed in the liquid refrigerant.
• the refrigerant stored in the internal space (15) is at a relatively low pressure.
• the low-pressure refrigerant exchanges heat with the heat medium flowing through the heat medium flow path (32).
• the refrigerant flow path (31) and the heat medium flow path (32) are adjacent to each other with the heat transfer plate (40) in between, so when the heat medium flows through the heat medium flow path (32), the liquid refrigerant absorbs heat from the heat medium and evaporates.
• the evaporated refrigerant moves from the refrigerant flow path (31) upward beyond the plate stack (30).
• the evaporated refrigerant flows out of the refrigerant outlet (22) into the refrigerant circuit.
• the shell-and-plate type heat exchanger (10) of the present embodiment is configured with a plate stack (30) having a plurality of heat transfer plates (40) that are stacked and joined to one another, so that the refrigerant flowing between the plurality of heat transfer plates (40) cannot flow in the stacking direction.
• the heat exchange efficiency of the entire plate stack (30) is improved.
• the section located in the center of the stacking direction is the central heat exchange section (35)
• the section located on one end side of the central heat exchange section (35) in the stacking direction (the left end side in Figure 2) is the first heat exchange section (36)
• the section located on the other end side of the central heat exchange section (35) in the stacking direction (the right end side in Figure 2) is the second heat exchange section (37).
• the heat exchanger (10) includes a partition member (5).
• the partition member (5) reduces the variation in the ratio of liquid refrigerant to gas refrigerant contained in the refrigerant undergoing heat exchange in the central heat exchange section (35) and the ratio of liquid refrigerant to gas refrigerant contained in the refrigerant undergoing heat exchange in the first heat exchange section (36) and the second heat exchange section (37).
• the partition member (5) is disposed below the plate stack (30).
• the partition member (5) has a first partition plate (61), a pair of guide plates (52), and a first side wall portion (63).
• the first partition plate (61) separates the plate stack (30) from the refrigerant inlet (21).
• the first partition plate (61) extends in the internal space (15) of the shell (11) along the stacking direction of the plate stack (30) between the first closing member (13) and the second closing member (14).
• the stacking direction of the plate stack (30) is referred to as the first direction (left-right direction in FIG. 2)
• the width direction of the first partition plate (61) perpendicular to the first direction is referred to as the second direction (left-right direction in FIG. 3).
• the first side wall portion (63) is formed by bending the edges of both ends of the first partition plate (61) in the second direction so as to be inclined downward. Both ends of the first side wall portion (63) in the second direction abut against the inner peripheral surface of the cylindrical body (12) of the shell (11).
• the partition member (5) has an internal flow path (55).
• the internal flow path (55) extends along the stacking direction of the plate stack (30).
• the refrigerant that flows in from the refrigerant inlet (21) flows through the internal flow path (55).
• the internal flow path (55) is provided in a space surrounded by the first partition plate (61), the first side wall portion (63), the cylindrical body (12), the first blocking member (13), and the second blocking member (14).
• the pair of guide plates (52) are provided below the first partition plate (61).
• the pair of guide plates (52) extend along the stacking direction of the plate stack (30) with a gap between them in the second direction. Both ends of the pair of guide plates (52) in the first direction are positioned inside both ends of the first partition plate (61) in the first direction (see FIG. 5). As a result, a gap is provided between the left end of the guide plate (52) and the first blocking member (13) and between the right end of the guide plate (52) and the second blocking member (14).
• the pair of guide plates (52) are inclined so as to widen outward in the second direction of the first partition plate (61) as they extend downward.
• the lower ends of the pair of guide plates (52) abut against the inner peripheral surface of the cylindrical body (12) of the shell (11).
• the internal flow path (55) includes a first flow path (56) and a second flow path (57).
• the first flow path (56) is formed of a space provided between the pair of guide plates (52).
• the first flow path (56) guides the refrigerant that has flowed in from the refrigerant inlet (21) to a position below the first heat exchange section (36) and the second heat exchange section (37).
• the second flow path (57) is formed by the space between the first side wall portion (63), which is the bent portion at both ends of the first partition plate (61) in the second direction, and the guide plate (52).
• the second flow path (57) is folded back at the end of the first flow path (56) in the first direction, and guides the refrigerant that has passed through the first flow path (56) to a position below the central heat exchange section (35).
• the partition member (5) has a first communication hole (58) and a second communication hole (59).
• the first communication hole (58) and the second communication hole (59) are provided in the first partition plate (61).
• the first communication holes (58) communicate with the first flow path (56) and open toward the plate stack (30).
• a plurality of first communication holes (58) are provided at intervals in the first and second directions of the first partition plate (61).
• the first communication holes (58) discharge gas refrigerant contained in the refrigerant flowing through the first flow path (56).
• the second communication holes (59) communicate with the second flow path (57) and open toward the plate stack (30).
• a plurality of second communication holes (59) are provided at intervals in the first direction of the first partition plate (61).
• the second communication holes (59) discharge liquid refrigerant contained in the refrigerant flowing through the second flow path (57).
• the refrigerant that flows from the refrigerant inlet (21) into the internal space (15) of the shell (11) passes through the first flow path (56) of the partition member (5) and flows along the first direction. This allows the refrigerant to be distributed to the central heat exchange section (35), the first heat exchange section (36), and the second heat exchange section (37) in the plate stack (30).
• the variation between the dryness of the refrigerant heat-exchanged in the central heat exchange section (35) and the dryness of the refrigerant heat-exchanged in the first heat exchange section (36) and the second heat exchange section (37) is 70% or less, and in particular, 40% or less.
• the variation between the mass flow rate of the liquid refrigerant undergoing heat exchange in the central heat exchange section (35) and the mass flow rate of the liquid refrigerant undergoing heat exchange in the first heat exchange section (36) and the second heat exchange section (37) is 30% or less, and particularly 20% or less.
• the partition member (5) reduces the variation in the amount of refrigerant flowing in the stacking direction of the plate stack (30), thereby improving the heat exchange efficiency of the plate stack (30) as a whole.
• the refrigerant flowing in from the refrigerant inlet (21) is guided to a position below the first heat exchange section (36) and the second heat exchange section (37) via the first flow path (56), and the refrigerant that has passed through the first flow path (56) is guided to a position below the central heat exchange section (35), thereby reducing the variation in the amount of refrigerant flowing in the stacking direction of the plate stack (30).
• the heat exchange efficiency of the plate stack (30) as a whole can be improved by appropriately setting the dryness of the refrigerant and the mass flow rate of the liquid refrigerant in the stacking direction of the plate stack (30).
• the refrigerant that flows from the refrigerant inlet (21) into the internal space (15) can be evenly distributed toward both ends in the first direction.
• a shell-and-plate heat exchanger (10) and a refrigerant circuit (1a) through which a refrigerant flows to be subjected to heat exchange in the shell-and-plate heat exchanger (10) are provided.
• the heat exchanger (10) includes a partition member (5).
• the partition member (5) reduces the variation in the ratio of liquid refrigerant to gas refrigerant contained in the refrigerant undergoing heat exchange in the central heat exchange section (35) and the ratio of liquid refrigerant to gas refrigerant contained in the refrigerant undergoing heat exchange in the first heat exchange section (36) and the second heat exchange section (37).
• the partition member (5) is disposed below the plate stack (30).
• the partition member (5) has a first partition plate (61), a second partition plate (62), and a first side wall portion (63).
• the first partition plate (61) extends along the first direction.
• the second partition plate (62) is disposed below the first partition plate (61) and extends along the first direction.
• the first side wall portion (63) extends along the peripheral portions of the first partition plate (61) and the second partition plate (62) and connects the first partition plate (61) and the second partition plate (62).
• the partition member (5) is configured as a box-shaped member having an internal flow path (55).
• the partition member (5) extends in the first direction between the first blocking member (13) and the second blocking member (14) in the internal space (15) of the shell (11).
• the downstream end of the refrigerant inlet (21) is connected to the second partition plate (62).
• the refrigerant inlet (21) is disposed below the central heat exchange section (35) of the plate stack (30).
• the refrigerant that flows in from the refrigerant inlet (21) flows through the internal flow path (55).
• the internal flow path (55) guides the refrigerant that flows from the refrigerant inlet (21) to a position below the central heat exchange section (35) to a position below the first heat exchange section (36) and the second heat exchange section (37).
• the partition member (5) has a first communication hole (68) and a second communication hole (69).
• the first communication hole (68) is provided in the first partition plate (61).
• the second communication hole (69) is provided in the second partition plate (62).
• the first communication holes (68) communicate with the internal flow path (55) and open toward the plate stack (30).
• a plurality of first communication holes (68) are provided at intervals in the first and second directions of the first partition plate (61) (see FIG. 9).
• the first communication holes (68) discharge the gas refrigerant contained in the refrigerant flowing through the internal flow path (55).
• the pitch of the first communication holes (68) arranged in the first direction is changed as appropriate. Specifically, the pitch (P1) between adjacent first communication holes (68) near the refrigerant inlet (21) is made larger than the pitch (P2) between adjacent first communication holes (68) at the end positions in the first direction.
• the refrigerant is more easily discharged from the end position in the first direction of the internal flow path (55). This prevents most of the gas refrigerant that flows into the internal flow path (55) from the refrigerant inlet (21) from being discharged toward the central heat exchange section (35), making it easier to distribute the refrigerant to the first heat exchange section (36) and the second heat exchange section (37).
• the second communication holes (69) communicate with the internal flow path (55) and open toward the opposite side of the plate stack (30).
• a plurality of second communication holes (69) are provided at intervals in the first and second directions of the second partition plate (62) (see FIG. 10).
• the second communication holes (69) discharge the liquid refrigerant contained in the refrigerant flowing through the internal flow path (55).
• the pitch of the second communication holes (69) arranged in the first direction is changed as appropriate. Specifically, the pitch (P1) between adjacent second communication holes (69) near the refrigerant inlet (21) is made larger than the pitch (P2) between adjacent second communication holes (69) at the end positions in the first direction.
• the refrigerant is more easily discharged from the end position in the first direction of the internal flow path (55). This prevents most of the liquid refrigerant that flows into the internal flow path (55) from the refrigerant inlet (21) from being discharged toward the central heat exchange section (35), making it easier to distribute the refrigerant to the first heat exchange section (36) and the second heat exchange section (37).
• the refrigerant flowing from the refrigerant inlet (21) toward the partition member (5) passes through the internal flow passage (55) of the partition member (5) and flows along the first direction. This allows the refrigerant to be distributed to the central heat exchange section (35), the first heat exchange section (36), and the second heat exchange section (37) in the plate stack (30).
• the refrigerant flowing in from the refrigerant inlet (21) is guided via the internal flow path (55) to a position below the first heat exchange section (36) and the second heat exchange section (37), and gas refrigerant is allowed to flow out from the first communication hole (68) and liquid refrigerant is allowed to flow out from the second communication hole (69). This reduces variation in the amount of refrigerant flowing in the stacking direction of the plate stack (30).
• the first communication holes (68) arranged in the first direction are arranged at the same pitch. Specifically, the pitch (P1) between adjacent first communication holes (68) near the refrigerant inlet (21) and the pitch (P2) between adjacent first communication holes (68) at the ends in the first direction are set to the same value.
• the hole diameters of the first communication holes (68) aligned in the first direction are appropriately changed. Specifically, the hole diameter d2 of the first communication holes (68) at the end positions in the first direction is made larger than the hole diameter d1 of the first communication holes (68) located closer to the refrigerant inlet (21).
• the hole diameter d1 of the communication hole (50) located closest to the refrigerant inlet (21) and the hole diameter d2 of the communication hole (50) located farthest from the refrigerant inlet (21) are set to satisfy the condition d1 ⁇ d2.
• the refrigerant is more easily discharged from the end position in the first direction of the internal flow path (55). This prevents most of the gas refrigerant that flows into the internal flow path (55) from the refrigerant inlet (21) from being discharged toward the central heat exchange section (35), making it easier to distribute the refrigerant to the first heat exchange section (36) and the second heat exchange section (37).
• the pitches of the second communication holes (69) arranged in the first direction are the same. Specifically, the pitch (P1) between adjacent second communication holes (69) near the refrigerant inlet (21) and the pitch (P2) between adjacent second communication holes (69) at the end positions in the first direction are set to the same size.
• the hole diameters of the second communication holes (69) aligned in the first direction are appropriately changed. Specifically, the hole diameter d2 of the second communication holes (69) at the end positions in the first direction is made larger than the hole diameter d1 of the second communication holes (69) located closer to the refrigerant inlet (21).
• the refrigerant is more easily discharged from the end position in the first direction of the internal flow path (55). This prevents most of the liquid refrigerant that has flowed into the internal flow path (55) from the refrigerant inlet (21) from being discharged toward the central heat exchange section (35), making it easier to distribute the refrigerant to the first heat exchange section (36) and the second heat exchange section (37).
• the heat exchanger (10) includes a partition member (5).
• the partition member (5) reduces variation in the ratio of liquid refrigerant to gas refrigerant contained in the refrigerant subjected to heat exchange in the central heat exchange section (35) and the ratio of liquid refrigerant to gas refrigerant contained in the refrigerant subjected to heat exchange in the first heat exchange section (36) and the second heat exchange section (37).
• the partition member (5) is disposed below the plate stack (30).
• the partition member (5) has an internal flow path (55) through which the refrigerant flowing in from the refrigerant inlet (21) flows.
• the partition member (5) includes a first partition plate (61), a second partition plate (62), a first side wall portion (63), and a second side wall portion (64).
• the internal flow path (55) includes an upper flow path (76) and a lower flow path (77).
• the first partition plate (61) extends along the first direction.
• the second partition plate (62) is disposed below the first partition plate (61) and extends along the first direction.
• the first side wall portion (63) extends along the peripheral edges of the first partition plate (61) and the second partition plate (62) and connects the first partition plate (61) and the second partition plate (62).
• the second side wall portion (64) extends downward from the peripheral edge of the second partition plate (62). The lower end of the second side wall portion (64) abuts against the inner peripheral surface of the cylindrical body (12) of the shell (11).
• an upper flow path (76) is provided between the first partition plate (61), the second partition plate (62), and the first side wall portion (63).
• a lower flow path (77) is provided between the second partition plate (62), the second side wall portion (64), and the cylindrical body (12).
• the refrigerant inlet (21) is connected to the lower flow path (77).
• the refrigerant that flows in from the refrigerant inlet (21) flows through the lower flow path (77).
• the refrigerant inlet (21) is provided at the center of the lower part of the shell (11) in the stacking direction of the plate stack (30).
• the partition member (5) has an upper communication hole (78) and a lower communication hole (79).
• the upper communication hole (78) is provided in the first partition plate (61).
• the lower communication hole (79) is provided in the second partition plate (62).
• the upper communication holes (78) communicate with the upper flow path (76) and open toward the plate stack (30).
• a plurality of upper communication holes (78) are provided at intervals in the first and second directions of the first partition plate (61) (see FIG. 15).
• the upper communication holes (78) discharge the refrigerant flowing through the upper flow path (76).
• the lower communication holes (79) communicate the lower flow path (77) and the upper flow path (76).
• a plurality of the lower communication holes (79) are provided at intervals in the first and second directions of the second partition plate (62) (see FIG. 16).
• the number of the lower communication holes (79) is smaller than the number of the upper communication holes (78).
• the lower communication holes (79) open at a position away from the refrigerant inlet (21).
• the lower communication holes (79) discharge the refrigerant flowing through the lower flow path (77) to the upper flow path (76).
• the refrigerant that flows in from the refrigerant inlet (21) flows through the lower flow path (77).
• the lower flow path (77) guides the refrigerant that flows from the refrigerant inlet (21) to a position below the central heat exchange section (35) to a position below the first heat exchange section (36) and the second heat exchange section (37).
• the refrigerant that flows into the lower flow passage (77) flows from the lower communication hole (79) toward the upper flow passage (76).
• the upper flow passage (76) guides the refrigerant that flows from the lower communication hole (79) to a position below the first heat exchange section (36) and the second heat exchange section (37) to a position below the central heat exchange section (35), the first heat exchange section (36), and the second heat exchange section (37), respectively.
• the refrigerant flowing through the upper flow passage (76) is discharged from the upper communication hole (78) toward the plate stack (30).
• the refrigerant flowing in from the refrigerant inlet (21) is circulated in the stacking direction of the plate stack (30) through the lower flow path (77), and is then guided to a position below the first heat exchange section (36) and the second heat exchange section (37) through the upper flow path (76). This mixes the liquid refrigerant and the gas refrigerant contained in the refrigerant and reduces variation in the amount of refrigerant flowing in the stacking direction of the plate stack (30).
• the heat exchanger (10) includes a partition member (5).
• the partition member (5) reduces variation in the ratio of liquid refrigerant to gas refrigerant contained in the refrigerant subjected to heat exchange in the central heat exchange section (35) and the ratio of liquid refrigerant to gas refrigerant contained in the refrigerant subjected to heat exchange in the first heat exchange section (36) and the second heat exchange section (37).
• the partition member (5) is disposed below the plate stack (30).
• the partition member (5) has a first partition plate (61), a stirring member (82), and a first side wall portion (63).
• the first partition plate (61) separates the plate stack (30) from the refrigerant inlet (21).
• the first partition plate (61) extends in the first direction between the first closing member (13) and the second closing member (14) in the internal space (15) of the shell (11).
• the first side wall portion (63) is formed by bending the edges of both ends of the first partition plate (61) in the second direction so as to be inclined downward. Both ends of the first side wall portion (63) in the second direction abut against the inner peripheral surface of the cylindrical body (12) of the shell (11).
• the partition member (5) has an internal flow path (55).
• the internal flow path (55) extends along the stacking direction of the plate stack (30).
• the refrigerant that flows in from the refrigerant inlet (21) flows through the internal flow path (55).
• the internal flow path (55) is provided in a space surrounded by the first partition plate (61), the first side wall portion (63), the cylindrical body (12), the first blocking member (13), and the second blocking member (14).
• the stirring member (82) is disposed in the internal flow path (55).
• the stirring member (82) is made of a porous material such as a mesh material.
• the gas refrigerant and liquid refrigerant contained in the refrigerant flowing through the internal flow path (55) are stirred when passing through the stirring member (82).
• the partition member (5) has a communication hole (50).
• the communication hole (50) is provided in the first partition plate (61).
• the communication hole (50) communicates with the internal flow path (55) and opens toward the plate stack (30).
• a plurality of communication holes (50) are provided at intervals in the first and second directions of the first partition plate (61).
• the communication holes (50) discharge the refrigerant flowing through the internal flow path (55).
• the partition member (5) has a first partition plate (61), a pair of guide plates (52), and a first side wall portion (63).
• the partition member (5) has an internal flow path (55).
• the internal flow path (55) extends along a first direction.
• the internal flow path (55) includes a first flow path (56) and a second flow path (57).
• the partition member (5) has a plurality of communication holes (50).
• the communication holes (50) include a first communication hole (58) and a second communication hole (59).
• the first communication hole (58) and the second communication hole (59) are provided in the first partition plate (61).
• the first communication hole (58) communicates with the first flow path (56). A plurality of the first communication holes (58) are provided at intervals in the first and second directions of the first partition plate (61).
• the second communication hole (59) communicates with the second flow path (57). A plurality of the second communication holes (59) are provided at intervals in the first direction of the first partition plate (61).
• the refrigerant inlet (21) is provided at a position shifted in the first direction from the center position in the first direction in the lower part of the shell (11).
• One end of the first partition plate (61) in the first direction is called the first end (91), and the other end is called the second end (92).
• the distance from the refrigerant inlet (21) to the first end (91) is longer than the distance from the refrigerant inlet (21) to the second end (92).
• the first region When viewed in the thickness direction of the first partition plate (61), the first region is the side of the first end (91) relative to the refrigerant inlet (21) of the first partition plate (61), and the second region is the side of the second end (92) relative to the refrigerant inlet (21).
• the first region and the second region are divided into left and right regions based on a center line passing through the center of the refrigerant inlet (21).
• the hole diameter d3 of the communication hole (50) formed in the first region and the hole diameter d4 of the communication hole (50) formed in the second region are set so as to satisfy the condition d3>d4.
• the partition member (5) has a first partition plate (61), a pair of guide plates (52), and a first side wall portion (63).
• the partition member (5) has an internal flow path (55).
• the internal flow path (55) extends along a first direction.
• the internal flow path (55) includes a first flow path (56) and a second flow path (57).
• the partition member (5) has a plurality of communication holes (50).
• the communication holes (50) include a first communication hole (58) and a second communication hole (59).
• the first communication hole (58) and the second communication hole (59) are provided in the first partition plate (61).
• the first communication hole (58) communicates with the first flow path (56). A plurality of the first communication holes (58) are provided at intervals in the first and second directions of the first partition plate (61).
• the second communication hole (59) communicates with the second flow path (57). A plurality of the second communication holes (59) are provided at intervals in the first direction of the first partition plate (61).
• the refrigerant inlet (21) is provided at a position shifted in the first direction from the center position in the first direction in the lower part of the shell (11).
• One end of the first partition plate (61) in the first direction is called the first end (91), and the other end is called the second end (92).
• the distance from the refrigerant inlet (21) to the first end (91) is longer than the distance from the refrigerant inlet (21) to the second end (92).
• the first region When viewed in the thickness direction of the first partition plate (61), the first region is the side of the first end (91) relative to the refrigerant inlet (21) of the first partition plate (61), and the second region is the side of the second end (92) relative to the refrigerant inlet (21).
• the flow path width L1 of the first region in the first flow path (56) and the flow path width L2 of the second region are set so as to satisfy the condition L1>L2.
• the flow path width of the first flow path (56) is constant.
• the flow path width of the first flow path (56) is narrowest at the end on the second end (92) side.
• the flow path width of the first flow path (56) gradually narrows from the first region to the second region. That is, in the first flow path (56), the refrigerant flows more easily in the first region, which has a larger flow path width, than in the second region, which has a smaller flow path width.
• the partition member (5) has a first partition plate (61), a second partition plate (62), and a first side wall portion (63).
• the partition member (5) has an internal flow path (55).
• the internal flow path (55) extends along the first direction.
• the downstream end of the refrigerant inlet (21) is connected to the second partition plate (62).
• the refrigerant inlet (21) is provided at a position shifted in the first direction from the center position in the first direction at the bottom of the shell (11).
• the partition member (5) has a plurality of communication holes (50).
• the communication holes (50) include a first communication hole (68) and a second communication hole (69).
• the first communication holes (68) are provided at intervals in the first direction and the second direction of the first partition plate (61).
• the second communication holes (69) are provided at intervals in the first direction and the second direction of the second partition plate (62).
• first end (91) One end of the first partition plate (61) in the first direction is called the first end (91), and the other end is called the second end (92).
• the distance from the refrigerant inlet (21) to the first end (91) is longer than the distance from the refrigerant inlet (21) to the second end (92).
• the first region When viewed in the thickness direction of the first partition plate (61), the first region is the side of the first end (91) relative to the refrigerant inlet (21) of the first partition plate (61), and the second region is the side of the second end (92) relative to the refrigerant inlet (21).
• the hole diameter d3 of the first communication hole (68) formed in the first region and the hole diameter d4 of the first communication hole (68) formed in the second region are set so as to satisfy the condition d3>d4.
• the hole diameter d5 of the second communication hole (69) formed in the first region and the hole diameter d6 of the second communication hole (69) formed in the second region are set so as to satisfy the condition d5>d6.
• the hole diameters of the communication holes (50) in the first region and the second region are set so that the refrigerant can easily flow through the communication holes (50) in the first region, which is located a long distance from the refrigerant inlet (21) in the first partition plate (61) and the second partition plate (62), thereby suppressing variation in the amount of refrigerant distributed.
• the partition member (5) has a first partition plate (61), a second partition plate (62), a first side wall portion (63), and a second side wall portion (64).
• the partition member (5) has an internal flow path (55).
• the internal flow path (55) extends along the first direction.
• the internal flow path (55) includes an upper flow path (76) and a lower flow path (77).
• the refrigerant inlet (21) communicates with the lower flow path (77).
• the refrigerant inlet (21) is provided at a position shifted from the center position in the first direction at the lower part of the shell (11).
• the partition member (5) has a plurality of communication holes (50).
• the communication holes (50) include an upper communication hole (78) and a lower communication hole (79).
• the upper communication holes (78) are provided at intervals in the first and second directions of the first partition plate (61).
• the upper communication holes (78) communicate with the upper flow path (76).
• the lower communication holes (79) are provided at intervals in the first and second directions of the second partition plate (62).
• the lower communication holes (79) communicate with the upper flow path (76) and the lower flow path (77).
• One end of the second partition plate (62) in the first direction is called the first end (91), and the other end is called the second end (92).
• the distance from the refrigerant inlet (21) to the first end (91) is longer than the distance from the refrigerant inlet (21) to the second end (92).
• the first region is the side of the second partition plate (62) closer to the first end (91) than the refrigerant inlet (21), and the second region is the side of the second end (92) than the refrigerant inlet (21).
• the hole diameter d5 of the lower communication hole (79) formed in the first region and the hole diameter d6 of the lower communication hole (79) formed in the second region are set so as to satisfy the condition d5>d6.
• the hole diameters of the lower communication holes (79) of the first and second regions are set so that the refrigerant can easily flow through the lower communication holes (79) of the first region, which is located a long distance from the refrigerant inlet (21) of the second partition plate (62), thereby suppressing variation in the amount of refrigerant distributed.
• the partition member (5) has a first partition plate (61), a stirring member (82), and a first side wall portion (63).
• the partition member (5) has an internal flow path (55).
• the internal flow path (55) extends along the first direction.
• the refrigerant inlet (21) communicates with the internal flow path (55).
• the refrigerant inlet (21) is provided at a position shifted from the center position in the first direction in the lower part of the shell (11).
• the partition member (5) has a plurality of communication holes (50).
• the communication holes (50) are provided at intervals in the first direction and the second direction of the first partition plate (61).
• the communication holes (50) communicate with the internal flow path (55).
• first end (91) One end of the first partition plate (61) in the first direction is called the first end (91), and the other end is called the second end (92).
• the distance from the refrigerant inlet (21) to the first end (91) is longer than the distance from the refrigerant inlet (21) to the second end (92).
• the first region When viewed in the thickness direction of the first partition plate (61), the first region is the side of the first end (91) relative to the refrigerant inlet (21) of the first partition plate (61), and the second region is the side of the second end (92) relative to the refrigerant inlet (21).
• the hole diameter d3 of the communication hole (50) formed in the first region and the hole diameter d4 of the communication hole (50) formed in the second region are set so as to satisfy the condition d3>d4.
• the hole diameters of the communication holes (50) in the first and second regions are set so that the refrigerant can easily flow through the communication holes (50) in the first region, which is located a long distance from the refrigerant inlet (21) in the first partition plate (61), thereby suppressing variation in the amount of refrigerant distributed.
• the present disclosure is useful for shell-and-plate heat exchangers and refrigeration systems.
• Refrigeration device 1 a Refrigerant circuit 5 Partition member 10 Shell and plate type heat exchanger REFERENCE SIGNS LIST 11 shell 15 internal space 21 refrigerant inlet 30 plate stack 32 heat medium flow path 35 central heat exchange section 36 first heat exchange section 37 second heat exchange section 40 heat transfer plate 50 communication hole 55 internal flow path 56 first flow path 57 second flow path 58 first communication hole 59 second communication hole 68 first communication hole 69 second communication hole 76 upper flow path 77 lower flow path 78 upper communication hole 79 lower communication hole 82 stirring member 91 first end 92 second end

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• 2024
  • 2024-03-25 WO PCT/JP2024/011788 patent/WO2024204114A1/ja unknown
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