Shell-and-plate type heat exchanger and refrigerating device
Patent Information
- Application Number
- JP2025008729
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2025-01-21
- Publication Date
- 2026-03-03
AI Technical Summary
In existing refrigerator condensers, the thickness of the housing increases to improve rigidity, but leads to an increase in overall weight, affecting the performance of the equipment.
A curved shell closure structure is adopted to reduce the overall size and weight of the shell. At the same time, the overall rigidity and compressive resistance are enhanced by providing plate-like materials in the curved shell.
It effectively reduces the overall weight of the refrigerator condenser, while avoiding housing deformation caused by pressure, and improving the overall performance of the equipment.
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Abstract
Description
[Technical field]
[0001] The present disclosure relates to a shell-and-plate heat exchanger and a refrigeration system. [Background technology]
[0002] Patent Document 1 discloses a refrigerant heat exchanger including a hollow container and a plate polymer housed in the internal space of the hollow container. In the refrigerant heat exchanger of Patent Document 1, refrigerant liquid introduced from a refrigerant pipe into the internal space of the hollow container exchanges heat with refrigerant liquid flowing through a through passage of the plate polymer. [Prior art documents] [Patent documents]
[0003] [Patent Document 1] JP 2018-204886 A Summary of the Invention [Problem to be solved by the invention]
[0004] Incidentally, in the refrigerant heat exchanger of Patent Document 1, the hollow vessel is composed of a cylindrical shell and disk-shaped flat ends that close the openings at both axial ends of the shell.
[0005] Here, since there is a risk that the disk-shaped flat end may be deformed by the pressure of the refrigerant liquid introduced into the internal space, it is conceivable to increase the thickness of the flat end to increase its rigidity.
[0006] However, increasing the thickness of the flat end poses the problem of increasing the weight of the entire hollow container.
[0007] An object of the present disclosure is to reduce the weight of the entire shell. [Means for solving the problem]
[0008] A first aspect of the present disclosure is a plate-and-shell heat exchanger including 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 a cylindrical body having both axial ends open. (12), a first blocking member (13) blocking an opening at one end of the cylindrical body (12), and a second blocking member (14) blocking an opening at the other end of the cylindrical body (12), wherein at least one of the first blocking member (13) and the second blocking member (14) is formed in a curved shape protruding outward in the axial direction of the cylindrical body (12), and a portion of the plate stack (30) is positioned inside at least one of the first blocking member (13) and the second blocking member (14), which are formed in a curved shape.
[0009] In the first aspect, by forming at least one of the first closing member (13) and the second closing member (14) in a curved shape, it is possible to reduce the weight of the shell (11) as a whole while suppressing deformation due to the pressure of the refrigerant that has flowed into the internal space (15) of the shell (11). In addition, by arranging a part of the plate stack (30) inside at least one of the first closing member (13) and the second closing member (14) that are formed in a curved shape, it is possible to reduce the size of the shell (11) as a whole.
[0010] A second aspect of the present disclosure is the plate-and-shell heat exchanger of the first aspect, wherein the axial length of the cylindrical body (12) is shorter than the length of the plate stack (30) in the stacking direction.
[0011] In the second embodiment, the axial length of the cylindrical body (12) is made shorter than the length of the plate stack (30) in the stacking direction, thereby making it possible to reduce the size of the shell (11) as a whole.
[0012] A third aspect of the present disclosure is a shell-and-plate type heat exchanger of the first or second aspect, wherein both the first blocking member (13) and the second blocking member (14) are formed in a curved shape protruding axially outward from the cylindrical body (12).
[0013] In the third aspect, by forming both the first closing member (13) and the second closing member (14) in a curved shape, it is possible to reduce the weight of the shell (11) as a whole while suppressing deformation due to the pressure of the refrigerant that has flowed into the internal space (15) of the shell (11).
[0014] A fourth aspect of the present disclosure is a plate-and-shell heat exchanger according to the first or second aspect, further comprising a reinforcing member (50) arranged between the plate stack (30) and at least one of the first blocking member (13) and the second blocking member (14) formed in a curved shape, and supporting the plate stack (30).
[0015] In the fourth aspect, the plate stack (30) is supported by the reinforcing member (50), so that the strength of the shell-and-plate heat exchanger as a whole can be increased.
[0016] A fifth aspect of the present disclosure is a shell-and-plate type heat exchanger of the fourth aspect, in which the reinforcing member (50) is arranged to extend between an end of the plate stack (30) in the stacking direction and at least one of the inner wall surfaces of the first blocking member (13) and the second blocking member (14), which are formed in a curved shape.
[0017] In the fifth embodiment, the reinforcing member (50) can prevent the plate stack (30) from deforming in the stacking direction.
[0018] A sixth aspect of the present disclosure is the shell-and-plate heat exchanger according to the fifth aspect, wherein a plurality of the reinforcing members (50) are provided at intervals from each other.
[0019] In the sixth aspect, by providing a plurality of reinforcing members (50), the strength of the shell-and-plate heat exchanger as a whole can be increased.
[0020] A seventh aspect of the present disclosure is the shell-and-plate heat exchanger of the first or second aspect, wherein the first closing member (13) and the second closing member (14) are attached to the cylindrical body (12) by welding.
[0021] In the seventh aspect, the first closing member (13) and the second closing member (14) are attached to the cylindrical body (12) by welding, thereby making it possible to increase the strength of the shell (11).
[0022] An eighth aspect of the present disclosure is a refrigeration system comprising a shell-and-plate heat exchanger (10) of the first or second aspect, and a refrigerant circuit (1a) through which a refrigerant flows to be subjected to heat exchange in the shell-and-plate heat exchanger (10).
[0023] In an eighth aspect, a refrigeration system including a shell-and-plate heat exchanger (10) can be provided. [Brief description of the drawings]
[0024] [Figure 1] FIG. 1 is a refrigerant circuit diagram showing the configuration of the refrigeration device of the first embodiment. [Diagram 2] FIG. 2 is a side cross-sectional view showing the configuration of a shell-and-plate heat exchanger. [Diagram 3] FIG. 3 is a front cross-sectional view showing the configuration of a shell-and-plate heat exchanger. [Figure 4] FIG. 4 is a cross-sectional plan view showing the configuration of a shell-and-plate heat exchanger. [Diagram 5] FIG. 5 is a side cross-sectional view showing the configuration of the plate stack. [Figure 6] FIG. 6 is a side cross-sectional view showing the configuration of the shell-and-plate heat exchanger of the second embodiment. [Figure 7] FIG. 7 is a cross-sectional plan view showing the configuration of a shell-and-plate heat exchanger. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0025] First Embodiment As shown in FIG. 1, a shell-and-plate heat exchanger (10) (hereinafter referred to as "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.
[0026] The refrigeration system (1) is an air conditioner. The air conditioner may be a cooling only machine, a heating only machine, or an air conditioner that switches between cooling and heating. In this case, the air conditioner has a switching mechanism (e.g., a four-way switching valve) that switches the circulation direction of the refrigerant. The refrigeration system (1) may be a water heater, a chiller unit, a cooling device that cools the air inside a storage unit, or the like. The cooling device cools the air inside a refrigerator, a freezer, a container, or the like.
[0027] <Heat exchanger> 2 to 4, 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).
[0028] A liquid refrigerant flows into the internal space (15) of the shell (11). The liquid refrigerant exchanges heat with a heat transfer medium flowing through the plate stack (30). In this manner, the heat exchanger (10) functions as an evaporator by evaporating the refrigerant that has flowed into the internal space (15) of the shell (11). The heat transfer medium may be, for example, water or brine.
[0029] <shell> The shell (11) has a tubular body (12), a first closing member (13), and a second closing member (14). The tubular body (12) is composed of a cylindrical member that extends horizontally and is open at both axial ends.
[0030] The first closing member (13) closes an opening at one end side (the left end side in FIG. 2) of the cylindrical body (12). The first closing member (13) is attached to the cylindrical body (12) by welding. The first closing member (13) is formed in a curved shape that protrudes outward in the axial direction of the cylindrical body (12).
[0031] The second closing member (14) closes the opening at the other end (the right end in FIG. 2) of the cylindrical body (12). The second closing member (14) is attached to the cylindrical body (12) by welding. The second closing member (14) is formed in a curved shape that protrudes outward in the axial direction of the cylindrical body (12).
[0032] 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). A plate stack (30) is housed in the internal space (15). The axial length of the cylindrical body (12) is shorter than the length of the plate stack (30) in the stacking direction.
[0033] As a result, the left end of the plate stack (30) protruding from the left end of the cylindrical body (12) is disposed inside the first closing member (13), and the right end of the plate stack (30) protruding from the right end of the cylindrical body (12) is disposed inside the second closing member (14).
[0034] In this manner, by forming the first closing member (13) and the second closing member (14) in a curved shape, it is possible to reduce the weight of the shell (11) as a whole while suppressing deformation due to the pressure of the refrigerant that has flowed into the internal space (15) of the shell (11). In addition, by arranging a part of the plate stack (30) inside the first closing member (13) and the second closing member (14) that are formed in a curved shape, it is possible to reduce the size of the shell (11) as a whole.
[0035] 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.
[0036] The refrigerant outlet (22) is provided at an upper portion 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).
[0037] The first closing 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.
[0038] The heat medium inlet (23) penetrates the first blocking member (13). The heat medium inlet (23) is connected to a heat medium introduction passage (33) of the plate stack (30). The heat medium inlet (23) supplies a 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 later).
[0039] 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).
[0040] Plate Stack 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) aligned horizontally.
[0041] As shown in Fig. 5, the heat transfer plate (40) includes a first plate (40a) and a second plate (40b). In the plate stack (30), the first plates (40a) and the second plates (40b) are stacked alternately. In the following description, the left side of the first plate (40a) and the second plate (40b) in Fig. 5 are referred to as the front side, and the right side of the first plate (40a) and the second plate (40b) in Fig. 5 are referred to as the back side.
[0042] <Heat medium introduction path, heat medium outlet path> The first plate (40a) has an inlet convex portion (41a) and an outlet convex portion (43a). The inlet convex portion (41a) and the outlet convex portion (43a) are formed by bulging a part of the first plate (40a) toward the front surface side.
[0043] The inlet protrusion (41a) is formed in the lower part of the first plate (40a). A 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.
[0044] The outlet protrusion (43a) is formed on the upper part of the first plate (40a). A first outlet hole (44a) is formed in the center of the outlet protrusion (43a). The first outlet hole (44a) is a circular hole that penetrates the first plate (40a) in the thickness direction.
[0045] 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 protruding a part of the second plate (40b) toward the rear surface side.
[0046] 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 penetrating 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).
[0047] The outlet recess (43b) is formed in the upper part of the second plate (40b). A 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).
[0048] In the plate stack 30, the peripheral edge of the first plate 40a and the peripheral edge of the second plate 40b adjacent to the rear surface of the first plate 40a are joined together by welding along the entire periphery. Alternatively, they may be joined together by brazing.
[0049] In the plate stack (30), 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 overlapping edges of the first inlet hole (42a) and the second inlet hole (42b) are joined by welding around the entire periphery. Alternatively, they may be joined by brazing. The first inlet hole (42a) and the second inlet hole (42b) communicate with a heat medium flow path (32) described later and introduce a heat medium into the heat medium flow path (32).
[0050] In the plate stack (30), 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 overlapping edges of the first outlet hole (44a) and the second outlet hole (44b) are joined by welding around the entire periphery. Alternatively, they may be joined by brazing. The first outlet hole (44a) and the second outlet hole (44b) communicate with a heat medium flow path (32) described later and guide the heat medium from the heat medium flow path (32).
[0051] In the plate stack (30), a heat medium introduction passage (33) is formed by the inlet convex portion (41a) and the first inlet hole (42a) of the first plate (40a) and the inlet concave portion (41b) and the second inlet hole (42b) of the second plate (40b).
[0052] In the plate stack (30), the outlet convex portion (43a) and the first outlet hole (44a) of the first plate (40a) and the outlet concave portion (43b) and the second outlet hole (44b) of the second plate (40b) form a heat medium discharge passage (34).
[0053] The heat medium inlet passage (33) is a passage extending in the stacking direction of the heat transfer plates (40) in the plate stack (30). The heat medium inlet passage (33) is a passage isolated from the internal space (15) of the shell (11) and connects all the heat medium flow passages (32) to the heat medium inlet (23).
[0054] The heat medium outlet path (34) is a passage extending in the stacking direction of the heat transfer plates (40) in the plate stack (30). The heat medium outlet path (34) is a passage isolated from the internal space (15) of the shell (11) and connects all the heat medium flow paths (32) to the heat medium outlets (24).
[0055] <Refrigerant flow path, heat medium flow path> The plate stack (30) has refrigerant channels (31) and heat medium channels (32). A plurality of refrigerant channels (31) and a plurality of heat medium channels (32) are formed with a heat transfer plate (40) interposed therebetween. The refrigerant channels (31) and the heat medium channels (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.
[0056] The first plate (40a) is provided with first front-side protrusions (45a) and first back-side protrusions (47a) that are alternately arranged. The first front-side protrusions (45a) bulge toward the front side of the first plate (40a). The first back-side protrusions (47a) bulge toward the back side of the first plate (40a).
[0057] The second plate (40b) is provided with second front-side protrusions (47b) and second rear-side protrusions (45b) that are alternately arranged. The second front-side protrusions (47b) bulge toward the front side of the second plate (40b). The second rear-side protrusions (45b) bulge toward the rear side of the second plate (40b).
[0058] 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 that communicates with the internal space (15) of the shell (11) and through which the refrigerant flows.
[0059] Specifically, the refrigerant flow path (31) includes a flow path formed between the front surface of the first back side convex portion (47a) and the back surface of the second front side convex portion (47b), and a space formed between the first front side convex portion (45a) and the second back side convex portion (45b).
[0060] 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).
[0061] Specifically, 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).
[0062] <Flow of heat transfer medium and refrigerant> The flow of the heat medium and the refrigerant in the heat exchanger 10 will now be described. Note that in Fig. 5, the flow of the heat medium is indicated by arrows.
[0063] 5, the heat medium flows into the heat medium inlet (23) through the heat medium introduction passage (33). The heat medium flowing through the heat medium introduction 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).
[0064] Specifically, the heat medium flowing through the heat medium introduction passage (33) flows into the heat medium flow path (32). The heat medium flows through the heat medium flow path (32) and at the same time passes through a space formed between the first back side convex portion (47a) and the second front side convex portion (47b) and flows into the heat medium flow path (32) adjacent to the upper side of the heat medium flow path (32). In this manner, the heat medium flows upward while flowing over both side ends of the heat transfer plate (40).
[0065] Next, the flow of the refrigerant will be described. In the refrigerant circuit (1a), the refrigerant that has passed through the pressure reducing mechanism (4) flows toward the heat exchanger (10). The liquid refrigerant flows from the refrigerant inlet (21) into the internal space (15) of the shell (11). In the internal space (15), 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).
[0066] Specifically, the refrigerant flow path (31) and the heat medium flow path (32) are adjacent to each other with the heat transfer plate (40) interposed therebetween, so that 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.
[0067] -Effects of embodiment 1- According to the features of the present embodiment, by forming at least one of the first closing member (13) and the second closing member (14) in a curved shape, it is possible to reduce the weight of the shell (11) as a whole while suppressing deformation due to the pressure of the refrigerant that has flowed into the internal space (15) of the shell (11). In addition, by arranging a part of the plate stack (30) inside at least one of the first closing member (13) and the second closing member (14) that are formed in a curved shape, it is possible to reduce the size of the shell (11) as a whole.
[0068] According to a feature of this embodiment, the axial length of the cylindrical body (12) is made shorter than the length of the plate stack (30) in the stacking direction, thereby making it possible to reduce the size of the shell (11) as a whole.
[0069] According to a feature of the present embodiment, by forming both the first closing member (13) and the second closing member (14) in a curved shape, it is possible to reduce the weight of the shell (11) as a whole while suppressing deformation due to the pressure of the refrigerant flowing into the internal space (15) of the shell (11).
[0070] According to the feature of the present embodiment, the first closing member (13) and the second closing member (14) are attached to the cylindrical body (12) by welding, thereby making it possible to increase the strength of the shell (11).
[0071] According to a feature of the present embodiment, a refrigeration system including a shell-and-plate heat exchanger (10) and a refrigerant circuit (1a) through which a refrigerant flows for heat exchange in the shell-and-plate heat exchanger (10) is provided. This makes it possible to provide a refrigeration system including the shell-and-plate heat exchanger (10).
[0072] Second Embodiment Hereinafter, the same parts as those in the first embodiment will be denoted by the same reference numerals, and only the differences will be described.
[0073] 6 and 7, the shell (11) has a cylindrical body (12), a first closing member (13), and a second closing member (14). A plate stack (30) is housed in an internal space (15) of the shell (11).
[0074] The shell (11) has a reinforcing member (50). The reinforcing member (50) includes a first reinforcing member (51) and a second reinforcing member (52). The first reinforcing member (51) and the second reinforcing member (52) are each formed of a plate-like member extending in the vertical direction.
[0075] The first reinforcing member (51) is disposed between one end (the right end in FIG. 6) of the plate stack (30) in the stacking direction and the inner wall surface of the curved first closing member (13). The first reinforcing member (51) is welded to the first closing member (13). The first reinforcing member (51) may be welded to the plate stack (30).
[0076] The first reinforcing member 51 supports the left end of the plate stack 30. A plurality of first reinforcing members 51 are provided at intervals from each other in the depth direction of the paper in Fig. 6 (the vertical direction in Fig. 7).
[0077] The second reinforcing member (52) is disposed between the other end (the right end in FIG. 6) of the plate stack (30) in the stacking direction and the inner wall surface of the curved second closing member (14). The second reinforcing member (52) is welded to the second closing member (14). The second reinforcing member (52) may be welded to the plate stack (30).
[0078] The second reinforcing member 52 supports the right end portion of the plate stack 30. A plurality of second reinforcing members 52 are provided at intervals from each other in the depth direction of the paper in Fig. 6 (the vertical direction in Fig. 7).
[0079] -Effects of embodiment 2- According to the feature of this embodiment, the plate stack (30) is supported by the reinforcing members (50), so that the strength of the shell-and-plate heat exchanger as a whole can be increased.
[0080] According to the feature of this embodiment, the reinforcing member (50) can suppress deformation of the plate stack (30) in the stacking direction.
[0081] According to the feature of this embodiment, by providing a plurality of reinforcing members (50), the strength of the shell-and-plate heat exchanger as a whole can be increased.
[0082] In addition, as long as the strength of the plate stack (30) in the stacking direction can be sufficiently ensured, such as when adjacent heat transfer plates (40) are brazed to each other inside the plate stack (30), the reinforcing member (50) may not be provided.
[0083] Other Embodiments Although the embodiments and modifications have been described above, it will be understood that various modifications of form and details are possible without departing from the spirit and scope of the claims. In addition, the elements of the above embodiments, modifications, and other embodiments may be appropriately combined or substituted. In addition, the descriptions "first," "second," "third," etc. in the specification and claims are used to distinguish the words to which these descriptions are attached, and do not limit the number or order of the words. [Industrial Applicability]
[0084] INDUSTRIAL APPLICABILITY As described above, the present disclosure is useful for a shell-and-plate heat exchanger and a refrigeration device. [Explanation of symbols]
[0085] 1 Refrigeration equipment 1a Refrigerant circuit 10. Shell and plate heat exchanger 11. Shell 12 Cylindrical body 13 First blocking member 14 Second blocking member 15. Interior Space 30 Plate stack 32 Heat transfer medium flow path 40 Heat transfer plate 50 Reinforcement member
Claims
[Claim 1] A shell-and-plate 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 accommodated in the internal space (15), wherein a refrigerant flowing into the internal space (15) of the shell (11) exchanges heat with a heat medium flowing into a heat medium flow path (32) of the plate stack (30), The shell (11) has a cylindrical body (12) that is open at both axial ends, a first closing member (13) that closes the opening at one end of the cylindrical body (12), and a second closing member (14) that closes the opening at the other end of the cylindrical body (12), At least one of the first closing member (13) and the second closing member (14) is formed in a curved shape that protrudes outward in the axial direction of the cylindrical body (12), A part of the plate stack (30) is disposed inside at least one of the first closing member (13) and the second closing member (14), which are formed in a curved shape. Shell and plate heat exchanger.