Heat exchanger and electric appliance with heat exchanger

Abstract

This heat exchanger (10) includes a bag (20), a first member (50), a second member (60), and a charging / discharging member (40). The first member (50) is disposed inside the bag (20) and fixed to a first inner surface (201) of the bag (20). The second member (60) is disposed inside the bag (20) and fixed to a second inner surface (202) of the bag (20). The second member (60) is disposed inside the bag (20) and fixed to a second inner surface (202) of the bag (20). The charging / discharging member (40) forms a charging / discharging inlet / outlet (40x) for charging / discharging a fluid into / from the bag (20). The first member (50) includes a linear protrusion (52) protruding toward the second inner surface (202). The second member (60) includes a linear recess (62) capable of holding the linear protrusion (52). The first member (50) and the second member (60) form a wall part (70) that divides the flow path (PT) in the bag (20) when the linear protrusion (52) is held in the linear recess (62). In a state in which the linear protrusion (52) is held in the linear recess (62), the first member (50) can move in the longitudinal direction of the linear protrusion (52) with respect to the second member (60).

Description

Heat exchangers and electrical appliances with heat exchangers

[0001] The present disclosure relates to heat exchangers and appliances with heat exchangers.

[0002] As disclosed in JP2007333314A, a heat exchanger including a bag containing a fluid is known. The heat exchanger exchanges heat between the fluid flowing in the bag and a heat exchange target. The heat exchanger heats or cools the heat exchange target. The heat exchanger has a temperature control function for controlling the temperature of the heat exchange target.

[0003] In the heat exchanger disclosed in JP2007333314A, the bag includes a first inner surface and a second inner surface facing each other. The heat exchanger includes a wall portion located within the bag and dividing a fluid flow path. The wall portion is formed by joining a sheet forming the first inner surface and a sheet forming the second inner surface. The sheet forming the first inner surface and the sheet forming the second inner surface are restricted from moving relative to each other at the portion forming the wall portion.

[0004] To improve temperature management performance, the heat exchanger is placed in a curved state to conform to the shape of the heat exchange target. When a conventional heat exchanger is placed in a curved state, wrinkles occur in one of the sheets forming the first inner surface or the second inner surface. In the conventional heat exchanger, the flow path within the bag is narrowed or blocked by the wrinkles, reducing the flow rate of the fluid flowing through the flow path. In the conventional heat exchanger, the reduced flow rate of the fluid reduces the temperature management performance.

[0005] The present disclosure is directed to improving the thermal management capabilities of heat exchangers.

[0006] A heat exchanger according to one embodiment of the present disclosure comprises: a bag including a first inner surface and a second inner surface facing each other in a first direction; a first member disposed within the bag and fixed to the first inner surface; a second member disposed within the bag and fixed to the second inner surface; and an inlet / outlet member forming an inlet / outlet for fluid to the bag, wherein the first member includes a linear protrusion protruding toward the second inner surface; the second member includes a linear recess capable of holding the linear protrusion; the first member and the second member form a wall portion that divides a flow path within the bag when the linear protrusion is held in the linear recess; and the first member is movable relative to the second member in the longitudinal direction of the linear protrusion when the linear protrusion is held in the linear recess.

[0007] According to the present disclosure, the temperature management function of the heat exchanger can be improved.

[0008] FIG. 1 is a plan view of a heat exchanger for explaining one embodiment. FIG. 2 is a cross-sectional view of the heat exchanger of FIG. 1 taken along line II-II. FIG. 3 is a cross-sectional view of a first sheet, a first member, a second sheet, and a second member. FIG. 4 is a perspective view of a first member and a linear protrusion. FIG. 5 is a perspective view of a second member and a linear recess. FIG. 6 is a cross-sectional view of the heat exchanger in a state in which the linear protrusion is held in the linear recess. FIG. 7 is a view showing the heat exchanger of FIG. 1 placed in an electrical appliance. FIG. 8 is an enlarged view of a first bent portion of FIG. 7. FIG. 9 is an enlarged view of a second bent portion of FIG. 7. FIG. 10 is a view showing a modified example of the heat exchanger. FIG. 11 is a cross-sectional view of the heat exchanger of FIG. 10 taken along line XI-XI. FIG. 12 is a view showing another modified example of the heat exchanger.

[0009] An embodiment of the present disclosure relates to the following [1] to

[11] .

[0010] [1] A heat exchanger comprising: a bag including a first inner surface and a second inner surface opposing each other in a first direction; a first member disposed within the bag and fixed to the first inner surface; a second member disposed within the bag and fixed to the second inner surface; and an inlet / outlet member forming an inlet / outlet for fluid into the bag, wherein the first member includes a linear protrusion protruding toward the second inner surface; the second member includes a linear recess capable of holding the linear protrusion; the first member and the second member form a wall portion that divides a flow path within the bag when the linear protrusion is held in the linear recess; and the first member is movable relative to the second member in the longitudinal direction of the linear protrusion when the linear protrusion is held in the linear recess.

[0011] [2] The heat exchanger according to [1], wherein the first member is movable in the first direction relative to the second member in a state in which the linear protrusions are held in the linear recesses.

[0012] [3] The heat exchanger according to [1] or [2], wherein the linear protrusion is detachable from the linear recess.

[0013] [4] The heat exchanger according to any one of [1] to [3], wherein the bag includes a heat seal layer that forms the first inner surface, the first member is bonded to the heat seal layer, and a holding force by which the linear recesses hold the linear protrusions is smaller than a joining force between the first member and the heat seal layer.

[0014] [5] The heat exchanger according to any one of [1] to [4], wherein the bag includes a heat seal layer that forms the second inner surface, the second member is bonded to the heat seal layer, and the holding force with which the linear recesses hold the linear protrusions is smaller than the bonding force between the first member and the heat seal layer.

[0015] [6] The heat exchanger of any one of [1] to [5], further comprising a spacer fixed to one of the first inner surface and the second inner surface within the bag and protruding toward the other of the first inner surface and the second inner surface.

[0016] [7] The heat exchanger according to [6], wherein the inlet / outlet member opens in the first direction, and the spacer overlaps with the inlet / outlet member in the first direction.

[0017] [8] The heat exchanger of any one of [1] to [7], wherein the pouring / unloading member is fixed to one of the first inner surface and the second inner surface and opens in the first direction, and the pouring / unloading member includes a protrusion that protrudes in the first direction toward the other of the first inner surface and the second inner surface within the bag.

[0018] [9] The heat exchanger according to any one of [1] to [8], wherein the bag has a width direction perpendicular to the longitudinal direction of the linear protrusion, and the first member and the second member are located on a center line of the bag in the width direction.

[0019]

[10] The heat exchanger of any of [1] to [9], comprising two inlet / outlet members, wherein the bag has a width direction perpendicular to the longitudinal direction of the linear convex portion, one of the two inlet / outlet members is an inlet member that forms an inlet for the fluid into the bag, and the other of the two inlet / outlet members is a outlet member that forms an outlet for the fluid from the bag, wherein the flow path includes a portion that extends from the inlet member in the longitudinal direction and a portion that extends in the longitudinal direction toward the outlet member, and wherein the wall portion is located between the inlet member and the outlet member in the width direction.

[0020]

[11] An electrical appliance with a heat exchanger, comprising: the heat exchanger according to any one of [1] to

[10] ; and an electrical appliance having a portion in contact with the heat exchanger.

[0021] Hereinafter, an embodiment of the present disclosure will be described with reference to the drawings. In the drawings, the scale and dimensional ratios are appropriately exaggerated from those of the actual objects in order to facilitate illustration and understanding. Note that configurations shown in some drawings may be omitted in other drawings.

[0022] In the following description, terms such as "orthogonal" and "same" for specifying shapes, geometric conditions, and their degrees, lengths, and angles are not limited to their strict meanings, but are to be interpreted to include a range of degrees within which similar functions can be expected.

[0023] Directions common to the drawings are indicated by arrows with the same symbol in each drawing. In each direction, the tip of the arrow is the first side. In each direction, the side opposite the first side, i.e., the base of the arrow, is the second side. An arrow pointing from the back to the front of the paper in a direction perpendicular to the paper surface is indicated by a symbol with a dot in a circle, as shown in FIG. 1, for example. An arrow pointing from the front to the back of the paper in a direction perpendicular to the paper surface is indicated by a symbol with an X in a circle, as shown in FIG. 2, for example.

[0024] 1 is a plan view of a heat exchanger 10. The heat exchanger 10 exchanges heat with a heat exchange target that is in contact with the heat exchanger 10. The heat exchanger 10 has a temperature control function that controls the temperature of the heat exchange target. The heat exchanger 10 may also cool the heat exchange target.

[0025] The heat exchanger 10 shown in FIGS. 1 and 2 includes a bag 20. The illustrated bag 20 has a certain thickness in a first direction DX. The thickness direction of the bag 20 is parallel to the first direction DX. The bag 20 has an elongated shape. The bag 20 has a longitudinal direction that is non-parallel to the thickness direction. The longitudinal direction of the illustrated bag 20 is parallel to a second direction DY that is perpendicular to the first direction DX. The longitudinal direction of the bag 20 may be referred to as a first longitudinal direction DL1. The bag 20 has a width direction that is non-parallel to both the thickness direction and the longitudinal direction (first longitudinal direction DL1). The width direction of the illustrated bag 20 is parallel to a third direction DZ that is perpendicular to both the first direction DX and the second direction DY. FIG. 1 shows a plan view of the heat exchanger 10 as viewed from a first side in the third direction DZ.

[0026] The bag 20 shown in Figures 1 and 2 contains a fluid. The fluid flows inside the bag 20. As will be described later, a fluid flow path is formed inside the bag 20. When the heat exchanger 10 heats a heat exchange target, the fluid flowing inside the bag 20 may be cooled. When the heat exchanger 10 cools a heat exchange target, the fluid flowing inside the bag 20 may be heated. The fluid may include water. The fluid may include antifreeze. The fluid may include an organic compound.

[0027] The heat exchanger 10 shown in FIG. 1 includes an inlet / outlet member 40 that forms a fluid inlet / outlet 40x into the bag 20. The fluid inlet / outlet 40x may be a fluid inlet 40y. The fluid inlet / outlet 40x may be a fluid outlet 40z. The heat exchanger 10 includes a wall portion 70 that divides the flow path PT. As will be described later, the wall portion 70 is formed by a first member 50 and a second member 60 that are positioned within the bag 20. The heat exchanger 10 includes the first member 50 and the second member 60 that are positioned within the bag 20.

[0028] 1 connects the inside of the bag 20 with the outside of the bag 20. The pouring / exiting member 40 has openings to both the inside of the bag 20 and the outside of the bag 20. The pouring / exiting member 40 may also be described as a connecting member. In the illustrated pouring / exiting member 40, the opening to the outside of the bag 20 forms the pouring / exiting port 40x described above.

[0029] The heat exchanger 10 shown in FIG. 1 includes two inlet / outlet members 40. One of the inlet / outlet members 40 is an inlet member 41 that forms an inlet for injecting a fluid into the bag 20. The other inlet / outlet member 40 is a outlet member 42 that forms an outlet for pouring a fluid from the bag 20. The illustrated bag 20 has an opening on a first side in the first direction DX at a portion where the inlet member 41 is attached. The bag 20 has an opening on a portion where the outlet member 42 is attached, facing the same direction as the inlet in the first direction DX. Fluid flows into the bag 20 from the inlet member 41. Fluid is discharged out of the bag 20 from the outlet member 42. The illustrated wall portion 70 is located between the inlet member 41 and the outlet member 42 in the width direction of the bag 20.

[0030] 1 and 2 is a pouch. The illustrated bag 20 includes a first sheet 21 and a second sheet 22 that face each other in a first direction DX. In the illustrated bag 20, the first sheet 21 is a single sheet. The second sheet 22 is a separate sheet from the first sheet 21.

[0031] 1 and 2 includes a joint 20p where the first sheet 21 and the second sheet 22 are joined to each other. The first sheet 21 and the second sheet 22 are heat-sealed to each other at the joint 20p. In the heat exchanger 10 shown in FIG. 1, the joint 20p is located on the periphery of the bag 20. In the illustrated bag 20, a storage section 20c for storing a fluid is formed in the central portion surrounded by the joint 20p.

[0032] The term "bonding" includes "adhesion," "bonding," and "welding."

[0033] The bag 20 shown in Fig. 2 has a first inner surface 201 and a second inner surface 202. In the illustrated bag 20, the first inner surface 201 is formed by the first sheet 21. The second inner surface 202 is formed by the second sheet 22. The first inner surface 201 and the second inner surface 202 face the fluid storage space in the storage portion 20c. The first inner surface 201 and the second inner surface 202 contact each other at the joint portion 20p.

[0034] The first sheet 21 and the second sheet 22 shown in Fig. 2 have the same layer structure. However, unlike the illustration, the first sheet 21 and the second sheet 22 may have different layer structures. Hereinafter, the layer structure of the first sheet 21 will be described mainly with reference to Fig. 3.

[0035] The first sheet 21 shown in Fig. 3 has a first surface 211 and a second surface 212 opposite to the first surface 211. The first surface 211 forms the outer surface of the bag 20. The second surface 212 forms the first inner surface 201 of the bag 20. The illustrated first sheet 21 includes, from the first surface 211 to the second surface 212, a first resin layer 31, a barrier layer 34, a second resin layer 32, and a heat-seal layer 35, in this order. In the illustrated first sheet 21, the first surface 211 is formed by the first resin layer 31. The second surface 212 is formed by the heat-seal layer 35.

[0036] As shown in FIG. 3 , the first sheet 21 may include a bonding layer 36. The bonding layer 36 contacts adjacent layers in the thickness direction of the first sheet 21. The illustrated first sheet 21 includes a first bonding layer 361, a second bonding layer 362, and a third bonding layer 363 as the bonding layer 36. The first sheet 21 includes the first bonding layer 361, the second bonding layer 362, and the third bonding layer 363 in this order from the first surface 211 to the second surface 212. Note that in the first sheet 21 shown in FIG. 3 , the thickness direction of the first sheet 21 is parallel to the thickness direction of the bag 20. The bonding layer 36 may include one or more of polyester, polyether, polyurethane, epoxy resin, phenolic resin, polyamide, polyolefin resin, polyvinyl acetate, cellulose, (meth)acrylic resin, polyimide, polycarbonate, amino resin, rubber, and silicone resin as materials. The bonding layer 36 may be made of one of these materials alone. The bonding layer 36 may be made of a combination of two or more of these materials.

[0037] 3 is located between the first resin layer 31 and the barrier layer 34. The first bonding layer 361 is in contact with the first resin layer 31 and the barrier layer 34. The first bonding layer 361 restricts the first resin layer 31 and the barrier layer 34 from moving relative to each other.

[0038] 3 is located between the barrier layer 34 and the second resin layer 32. The second bonding layer 362 is in contact with the barrier layer 34 and the second resin layer 32. The second bonding layer 362 restricts the barrier layer 34 and the second resin layer 32 from moving relative to each other.

[0039] 3 is located between the second resin layer 32 and the heat seal layer 35. The third bonding layer 363 is in contact with the second resin layer 32 and the heat seal layer 35. The third bonding layer 363 restricts the second resin layer 32 and the heat seal layer 35 from moving relative to each other.

[0040] The first resin layer 31 shown in FIG. 3 is made of resin. The first resin layer 31 supports the layers of the first sheet 21 other than the first resin layer 31. The first resin layer 31 may be referred to as a base layer. The first resin layer 31 may have electrical insulation properties. The first resin layer 31 may electrically insulate the heat exchange target from the flow path. The illustrated first resin layer 31 is in a film form. A resin film may be used as the first resin layer 31. The first resin layer 31 may be a biaxially oriented nylon film (ONy). From the viewpoint of suppressing deformation of the heat exchanger 10 under high-temperature conditions, the material of the first resin layer 31 may be a polyester-based resin such as polyethylene terephthalate (PET). The thickness of the first resin layer 31 may be 10 μm or more, or 12 μm or more. The thickness of the first resin layer 31 may be 40 μm or less. The thickness of the first resin layer 31 may be 25 μm or less.

[0041] The second resin layer 32 shown in FIG. 3 is made of resin. The second resin layer 32 improves the strength of the first sheet 21 against external forces. Specifically, the second resin layer 32 improves one or more of the bending resistance and impact resistance of the first sheet 21. The illustrated second resin layer 32 is in the form of a film. A resin film may be used as the second resin layer 32. From the viewpoint of improving the strength of the first sheet 21 against external forces, the material of the second resin layer 32 may be a polyamide-based resin. The thickness of the second resin layer 32 may be 10 μm or more, or 12 μm or more. The thickness of the second resin layer 32 may be 40 μm or less. The thickness of the second resin layer 32 may be 25 μm or less.

[0042] The barrier layer 34 shown in FIG. 3 is located between the first resin layer 31 and the second resin layer 32. The barrier layer 34 is located between the first bonding layer 361 and the second bonding layer 362. The barrier layer 34 is in contact with the first bonding layer 361 and the second bonding layer 362. The barrier layer 34 has barrier properties. The barrier layer 34 with barrier properties prevents water vapor and the like from entering the flow paths. The barrier layer 34 with barrier properties prevents fluid from leaking from the flow paths. The barrier layer 34 may have a function of improving the tensile strength of the first sheet 21.

[0043] The barrier layer 34 may be a metal foil. The material of the metal foil may include one or more of an aluminum alloy, stainless steel, and titanium steel. The barrier layer 34 may be a vapor-deposited film. The barrier layer 34 may be a vapor-deposited film of a metal such as aluminum, chromium, or tin. The barrier layer 34 may be a vapor-deposited film of an inorganic oxide such as silicon dioxide, zirconia, or aluminum oxide. The barrier layer 34 may be a vapor-deposited film of a carbon-containing inorganic oxide.

[0044] The heat seal layer 35 shown in Fig. 3 has heat-welding properties that allow it to be welded to other members at high temperatures. The "high temperature state" at which the heat seal layer 35 has heat-welding properties may be 100°C or higher, 150°C or higher, 170°C or higher, or 180°C or higher. The illustrated heat seal layer 35 of the first sheet 21 is welded to the heat seal layer 35 of the second sheet 22 at the peripheral edge of the heat exchanger 10. From the viewpoint of improving heat-welding properties with other members, the heat seal layer 35 may contain one or more of polypropylene, high-density polyethylene, low-density polyethylene, and linear low-density polyethylene-based resin.

[0045] The above description of the layer structure of the first sheet 21 also applies to the layer structure of the second sheet 22 shown in FIGS. 2 and 3 . That is, the second sheet 22 shown in FIGS. 2 and 3 has a first surface 221 and a second surface 222 opposite the first surface 221. The first surface 221 forms the outer surface of the bag 20. The second surface 222 forms the second inner surface 202 of the bag 20. The second sheet 22 includes, in this order from the first surface 221 to the second surface 222, the first resin layer 31, the barrier layer 34, the second resin layer 32, and the heat seal layer 35. The first surface 221 is formed by the first resin layer 31. The second surface 222 is formed by the heat seal layer 35. The illustrated second sheet 22 includes the first bonding layer 361, the second bonding layer 362, and the third bonding layer 363 as the bonding layer 36.

[0046] 3, when the first inner surface 201 and the second inner surface 202 are both formed by the heat seal layer 35, the heat seal layer 35 forming the first inner surface 201 may be referred to as a first heat seal layer 351. The heat seal layer 35 forming the second inner surface 202 may be referred to as a second heat seal layer 352.

[0047] 1 and 2 is cylindrical. The inlet / outlet member 40 has a first opening 40a and a second opening 40b. The first opening 40a is located outside the bag 20. The second opening 40b is located inside the bag 20. The first opening 40a forms an inlet / outlet 40x for fluid into the bag 20.

[0048] The heat exchanger 10 shown in FIGS. 1 and 2 includes two inlet / outlet members 40. In the illustrated heat exchanger 10, one of the two inlet / outlet members 40 is an inlet member 41. The inlet member 41 has an inlet 40y as an inlet / outlet port 40x. The other of the two inlet / outlet members 40 is a outlet member 42. The outlet member 42 has an outlet 40z as an inlet / outlet port 40x. The two inlet / outlet members 40 are each bonded to the first sheet 21. The two inlet / outlet members 40 are each fixed to the first inner surface 201. The inlet / outlet members 40 may be manufactured by injection molding. That is, the inlet / outlet members 40 may be manufactured by solidifying molten injected resin.

[0049] 1 and 2, the fluid flowing into the bag 20 passes through the inlet / outlet member 40 via the first opening 40a and then the second opening 40b. The fluid flowing into the bag 20 passes through the injection member 41 via the first opening 40a and then the second opening 40b. The fluid flowing out of the bag 20 passes through the inlet / outlet member 40 via the second opening 40b and then the first opening 40a. The fluid flowing out of the bag 20 passes through the outlet member 42 via the second opening 40b and then the first opening 40a.

[0050] A hose (not shown) may be attached to the inlet / outlet member 40. The fluid may be supplied from the hose. As shown in FIG. 2, the inlet / outlet member 40 may include a claw 40n capable of holding the hose attachment port. The illustrated claw 40n extends in a direction non-parallel to the direction in which the inlet / outlet member 40 protrudes from the bag 20 (first direction DX in FIG. 2). In the illustrated heat exchanger 10, the hose attachment port is held by the claw 40n, thereby preventing the hose from coming off the inlet / outlet member 40. The inlet / outlet member 40 including the claw 40n allows for a stable supply of fluid into the bag 20.

[0051] 1 and 2 include protrusions 45 that protrude in the first direction DX toward the second inner surface 202. The protrusions 45 are located within the bag 20. The illustrated pouring / unloading member 40 includes a plurality of protrusions 45 spaced apart in the circumferential direction about an axis extending in the first direction DX. Passage between adjacent protrusions 45 is possible.

[0052] 1 and 2 , the second sheet 22 is restricted from moving in the first direction DX toward the first sheet 21 by contacting the protrusion 45 of the inlet / outlet member 40. In the illustrated heat exchanger 10, the first inner surface 201 and the second inner surface 202 are separated from each other in the first direction DX by the protrusion 45 that protrudes toward the second inner surface 202. The inlet / outlet member 40 including the protrusion 45 allows the heat exchanger 10 to expand the flow path PT within the bag 20 in the first direction DX at the portion of the bag 20 where the inlet / outlet member 40 is attached.

[0053] The heat exchanger 10 shown in Figures 2 to 4 includes a first member 50 fixed to the first inner surface 201 of the bag 20. The first member 50 is joined to the first inner surface 201. The illustrated first member 50 contacts the first surface 211 of the first sheet 21 at a contact surface 50a. The contact surface 50a extends in the second direction DY and the third direction DZ. The illustrated first member 50 contacts the heat seal layer 35 of the first sheet 21 from the contact surface 50a.

[0054] The first member 50 shown in FIGS. 2 to 4 may be bonded to the heat seal layer 35 by being pressed against the heat seal layer 35 at a high temperature. The illustrated first member 50 is bonded to the heat seal layer 35 with a certain degree of bonding force. The bonding force between the first member 50 and the heat seal layer 35 is the force required to peel the first member 50 from the sheet including the heat seal layer 35. The first sheet 21 may be welded to the first member 50 at the heat seal layer 35, as shown in FIG. 3. The thickness of the heat seal layer 35 shown in FIG. 3 is smaller at the portion contacting the first member 50 than at the portion other than the portion contacting the first member 50.

[0055] The first member 50 may contain a resin such as polypropylene, high-density polyethylene, low-density polyethylene, or linear low-density polyethylene. The first member 50 may be produced by extrusion molding. That is, the first member 50 may be produced by solidifying a resin extruded from a mold in a molten state. The glass transition temperature of the resin contained in the first member 50 may be higher than the glass transition temperature of the resin contained in the heat seal layer 35 of the first sheet 21.

[0056] 3 and 4 includes a base 51 and a linear protrusion 52 protruding from the base 51 toward the second inner surface 202. The illustrated base 51 and linear protrusion 52 are connected to each other without a joint. In the illustrated first member 50, the contact surface 50a is located on the base 51. That is, the first member 50 contacts the first inner surface 201 at the base 51.

[0057] The linear protrusions 52 shown in Figures 3 and 4 have a longitudinal direction. The longitudinal direction of the linear protrusions 52 may be referred to as a second longitudinal direction DL2. The second longitudinal direction DL2 is the direction in which the linear protrusions 52 extend. In the illustrated heat exchanger 10, when the first member 50 is fixed to the first inner surface 201, the second longitudinal direction DL2 is parallel to the first longitudinal direction DL1. When the first member 50 is fixed to the first inner surface 201, the second longitudinal direction DL2 is parallel to the second direction DY. The illustrated linear protrusions 52 protrude from the base 51 toward the second side in the first direction DX.

[0058] The linear protrusion 52 shown in FIGS. 3 and 4 includes a first portion 521 and a second portion 522 connected to the first portion 521. The illustrated first portion 521 is located between the base 51 and the second portion 522 in the first direction DX. The width of the illustrated second portion 522, i.e., its length in the third direction DZ, increases toward the first portion 521. In the linear protrusion 52 shown in FIG. 3, the maximum width WD2 of the second portion 522 is greater than the maximum width WD1 of the first portion 521. When viewed from the second longitudinal direction DL2, i.e., in the state shown in FIG. 3, the linear protrusion 52 has an arrow-shaped configuration. The first portion 521 may be referred to as a shaft portion. The second portion 522 may be referred to as a widened portion.

[0059] The heat exchanger 10 shown in Figures 2, 3, and 5 includes a second member 60 fixed to the second inner surface 202 of the bag 20. The second member 60 is joined to the second inner surface 202. The illustrated second member 60 contacts the first surface 221 of the second sheet 22 at a contact surface 60a. The contact surface 60a extends in the second direction DY and the third direction DZ. The illustrated second member 60 contacts the heat seal layer 35 of the second sheet 22 from the contact surface 60a.

[0060] The second member 60 shown in Figures 2, 3, and 5 may be bonded to the heat seal layer 35 by being pressed against the heat seal layer 35 at a high temperature. The illustrated second member 60 is bonded to the heat seal layer 35 with a certain degree of bonding force. The bonding force between the second member 60 and the heat seal layer 35 is the force required to peel the second member 60 from the sheet including the heat seal layer 35. The second sheet 22 may be welded to the second member 60 at the heat seal layer 35, as shown in Figure 3. The thickness of the heat seal layer 35 shown in Figure 3 is smaller at the portion welded to the second member 60 than at the portion other than the portion welded to the second member 60.

[0061] The second member 60 may contain a resin such as polypropylene, high-density polyethylene, low-density polyethylene, or linear low-density polyethylene. The second member 60 may be produced by extrusion molding. The glass transition temperature of the resin contained in the second member 60 may be higher than the glass transition temperature of the resin contained in the heat seal layer 35 of the second sheet 22.

[0062] The second member 60 shown in FIG. 5 includes a base 61 and a linear recess 62 protruding from the base 61 toward the first inner surface 201. The base 61 and the linear recess 62 are seamlessly connected to each other. In the illustrated second member 60, the contact surface 60a is located on the base 61. That is, the second member 60 contacts the second inner surface 202 at the base 61. When the second member 60 is fixed to the second inner surface 202, the linear recess 62 extends linearly in a direction parallel to the second longitudinal direction DL2. The linear recess 62 protrudes from the base 61 toward the first side in the first direction DX.

[0063] 2, 3, and 5 includes a bottom 621 and a wall 622 protruding from the bottom 621 toward the first inner surface 201. In the illustrated linear recess 62, the bottom 621 and the wall 622 are connected to each other without a joint. In the illustrated linear recess 62, the bottom 621 and the wall 622 form an accommodation space 60s for at least partially accommodating the linear protrusion 52.

[0064] The linear recess 62 shown in Figures 2, 3, and 5 includes, as wall portions 622, a first wall portion 622a and a second wall portion 622b protruding from both ends of the bottom portion 621 in the third direction DZ. As shown in Figure 5, the first wall portion 622a and the second wall portion 622b each extend in the second direction DY. The first wall portion 622a and the second wall portion 622b face each other in the third direction DZ. As shown in Figure 3, the first wall portion 622a and the second wall portion 622b may include claw portions 60n protruding toward each other at ends opposite the end connected to the bottom portion 621.

[0065] The linear recess 62 shown in Figures 3 and 5 can at least partially accommodate the linear protrusion 52, as shown in Figure 2. The illustrated accommodation space 60s is open toward the linear protrusion 52. In Figure 2, the linear protrusion 52 is accommodated in the accommodation space 60s at the second portion 522 and a part of the first portion 521. In the illustrated linear recess 62, the accommodation space 60s is formed by a bottom portion 621 and a wall portion 622.

[0066] The minimum opening width WD3 of the storage space 60s shown in FIG. 3 is larger than the maximum width WD1 of the first portion 521. The minimum opening width WD3 of the storage space 60s shown in the figure is smaller than the maximum width WD2 of the second portion 522. The minimum opening width is the smallest value of the opening width of the storage space 60s. The opening width of the storage space 60s in the illustrated linear recess 62 is the distance between the first wall portion 622a and the second wall portion 622b in the third direction DZ. In the illustrated linear recess 62, the opening of the storage space 60s is formed by the portions of the first wall portion 622a and the second wall portion 622b that protrude toward each other.

[0067] 6 is restricted from moving out of the storage space 60s because the minimum opening width WD3 of the storage space 60s is smaller than the maximum width WD2 of the second portion 522. When the second portion 522 is accommodated within the storage space 62s, movement of the linear protrusion 52 in the first direction DX relative to the linear recess 62 is restricted. Therefore, the illustrated linear recess 62 can hold the second portion 522 of the linear protrusion 52 within the storage space 60s.

[0068] The linear protrusion 52 may be at least partially accommodated in the accommodation space 60s of the linear recess 62 as shown in Fig. 6 by pressing the second portion 522 against the opening of the accommodation space 60s from the state shown in Fig. 3. When the second portion 522 is accommodated in the accommodation space 60s, the illustrated first wall portion 622a and second wall portion 622b may be deformed from the state shown in Fig. 3. When the second portion 522 is disposed in the accommodation space 60s, the first wall portion 622a and second wall portion 622b may return from the deformed state to the state shown in Fig. 3.

[0069] The linear protrusions 52, while held by the linear recesses 62, are movable in the second longitudinal direction DL2 relative to the linear recesses 62. The linear protrusions 52 may move in the second longitudinal direction DL2 relative to the linear recesses 62 while in contact with the linear recesses 62. As the linear protrusions 52 move in the second longitudinal direction DL2 relative to the linear recesses 62, the first member 50 to which the linear protrusions 52 are fixed is movable in the second longitudinal direction DL2 relative to the second member 60 to which the linear recesses 62 are fixed. In the illustrated heat exchanger 10, the first member 50 is movable in the first longitudinal direction DL1 relative to the second member 60.

[0070] When the first member 50 moves in the second longitudinal direction DL2 relative to the second member 60, the first sheet 21 forming the first inner surface 201 is movable relative to the second sheet 22 forming the second inner surface 202. The first sheet 21 is movable in the second longitudinal direction DL2 relative to the second sheet 22 at the portion where the first member 50 is fixed, i.e., the central portion in the width direction of the bag 20. In the illustrated heat exchanger 10, the first sheet 21 is movable in the first longitudinal direction DL1 relative to the second sheet 22.

[0071] When the linear protrusions 52 are held in the linear recesses 62, the first member 50 and the second member 60 form a wall portion 70 as shown in FIGS. 1 and 2 within the bag 20. The wall portion 70 shown in FIG. 1 is located in the storage portion 20c of the bag 20. The wall portion 70 extends in the second direction DY. The wall portion 70 extends in the first longitudinal direction DL1. The wall portion 70 extends in the second longitudinal direction DL2. The wall portion 70 is located in the central portion of the width direction of the bag 20 (the third direction DZ in FIG. 1). The illustrated wall portion 70 includes a portion located on the center line WL in the width direction of the bag 20. As long as the linear protrusions 52 are held in the linear recesses 62, the first member 50 forms the wall portion 70 even when moved in the second longitudinal direction DL2 from the state shown in FIG. 1 relative to the second member 60.

[0072] The wall portion 70 shown in FIG. 1 has a first end 71 and a second end 72 in the second longitudinal direction DL2. In the illustrated wall portion 70, the first end 71 is the end on the second side in the second longitudinal direction DL2. The second end 72 is the end on the first side in the second longitudinal direction DL2. As shown in FIGS. 8 and 9 , the first end 71 and the second end 72 extend in the thickness direction of the bag 20 between the first inner surface 201 and the second inner surface 202. As shown in FIG. 8 , the first end 71 includes a first connecting portion 711 connecting to the first inner surface 201 and a second connecting portion 712 connecting to the second inner surface 202. As shown in FIG. 9 , the second end 72 includes a third connecting portion 721 connecting to the first inner surface 201 and a fourth connecting portion 722 connecting to the second inner surface 202.

[0073] 1 , the wall portion 70 divides the flow path PT within the bag 20. In the illustrated heat exchanger 10, a gap through which a fluid can pass is formed between the first side end of the wall portion 70 in the second direction DY and the joint portion 20p of the bag 20. The wall portion 70 is connected to the joint portion 20p of the bag 20 at the second side end in the second direction DY.

[0074] The wall portion 70 separates the first inner surface 201 and the second inner surface 202 from each other in the first direction DX. In the heat exchanger 10 shown in Fig. 1, the wall portion 70 separates the first sheet 21 and the second sheet 22 from each other in the first direction DX. In the heat exchanger 10, the flow path PT may be enlarged in the first direction DX around the wall portion 70.

[0075] The flow path PT shown in FIG. 1 includes a portion extending in the second longitudinal direction DL2 along the wall portion 70. The illustrated flow path PT includes a first flow path PT1 extending from the injection member 41 to a first side in the second longitudinal direction DL2 and a second flow path PT2 extending to a second side in the second longitudinal direction DL2 toward the discharging member 42. In FIG. 1, the first flow path PT1 and the second flow path PT2 are indicated by arrows extending in opposite directions. The illustrated flow path PT also includes a connection flow path PT3 connecting the first flow path PT1 and the second flow path PT2. The connection flow path PT3 is located at the first end of the flow path PT in the second direction DY. The connection flow path PT3 is formed between the first end of the wall portion 70 in the second direction DY and the joint portion 20p.

[0076] 1, the fluid flows into the bag 20 from the injection member 41. The fluid flows through the flow paths PT formed in the bag 20 in the order of the first flow path PT1, the connecting flow path PT3, and the second flow path PT2, and is discharged from the outlet member 42.

[0077] 1 and 2, the fluid flows into the first flow path PT1 by passing between the circumferentially adjacent protrusions 45 of the injection member 41. In the illustrated pouring member 42, the fluid that has passed through the second flow path PT2 passes between the circumferentially adjacent protrusions 45 of the pouring member 42 and flows out of the bag 20.

[0078] As shown in FIG. 6 , the first member 50 may be movable in the first direction DX relative to the second member 60 with the linear protrusions 52 held in the linear recesses 62. In the bag 20 shown in FIG. 6 , the first sheet 21 and the second sheet 22 are pushed away from each other in the first direction DX, compared to the state shown in FIG. 2 . By pushing the first sheet 21 and the second sheet 22 away from each other, the linear protrusions 52 and the linear recesses 62 are pulled away from each other in the first direction DX. The linear protrusions 52 and the linear recesses 62 may be pulled as shown in FIG. 6 due to an increase in the pressure of the fluid flowing through the bag 20. Even in the state shown in FIG. 6 , the second portion 522 of the linear protrusion 52 is accommodated in the accommodation space 60s by the claws 60n formed on the first wall portion 622a and the second wall portion 622b. The linear protrusions 52 are held by the linear recesses 62 even in the state shown in FIG.

[0079] Because the linear protrusions 52 are held in the linear recesses 62, the first member 50 and the second member 60 form a wall 70 within the bag 20 even in the state shown in Fig. 6. In the heat exchanger 10 shown in Fig. 6, the flow path PT within the bag 20 is expanded in the first direction DX compared to the state shown in Fig. 2. Expanding the flow path PT increases the flow rate of the fluid flowing within the bag 20, thereby improving the temperature management function of the heat exchanger 10.

[0080] 3, the first member 50 may move away from the second member 60 in the first direction DX. In FIG. 3, the linear protrusion 52 moves away from the linear recess 62, causing the first member 50 to move away from the second member 60 in the first direction DX. The second portion 522 of the illustrated linear protrusion 52 can move away from the accommodation space 60s of the linear recess 62 by the claws 60n formed on the first wall 622a and the second wall 622b moving away from each other in the third direction DZ.

[0081] The illustrated claw portion 60n moves away from each other as the first wall portion 622a and the second wall portion 622b are pulled by the second portion 522 of the linear protrusion 52. The illustrated first wall portion 622a and the second wall portion 622b are pushed toward the first inner surface 201 at the claw portion 60n by the second portion 522 of the linear protrusion 52. As a result, the claw portions 60n bend in directions away from each other in the third direction DZ, with the connection portion with the bottom portion 621 as the axis.

[0082] In the state shown in Fig. 3, the first member 50 is not connected to the second member 60. In the bag 20 shown in Fig. 3, the first inner surface 201 and the second inner surface 202 are further pulled in a direction away from each other in the first direction DX, compared to the bag 20 shown in Fig. 6. The bag 20 may be pulled as shown in Fig. 3 by further increasing the pressure of the fluid flowing inside the bag 20 from the state shown in Fig. 6.

[0083] The illustrated linear protrusions 52 detach from the linear recesses 62 when pulled by a certain amount of force toward the first side in the first direction DX relative to the linear recesses 62. The illustrated linear protrusions 52 detach from the linear recesses 62 when the force pulling the linear protrusions 52 in the first direction DX relative to the linear recesses 62 exceeds the holding force with which the linear recesses 62 hold the linear protrusions 52.

[0084] As shown in FIGS. 1 and 2 , the heat exchanger 10 may include a spacer 80 positioned within the bag 20. The spacer 80 is positioned in the storage portion 20c of the bag 20. The spacer 80 is fixed to one of the first inner surface 201 and the second inner surface 202. The illustrated spacer 80 is bonded to one of the first inner surface 201 and the second inner surface 202. The spacer 80 bonded to one of the first inner surface 201 and the second inner surface 202 protrudes toward the other of the first inner surface 201 and the second inner surface 202. The illustrated heat exchanger 10 includes three spacers 80 positioned within the bag 20. Two spacers 80 extend in the second direction DY. One spacer 80 extends in the third direction DZ.

[0085] The spacer 80 shown in FIGS. 1 and 2 is joined to the second sheet 22. The spacer 80 protrudes toward the first sheet 21. The first sheet 21 can contact the spacer 80 from a first side in the first direction DX. In the illustrated heat exchanger 10, the first sheet 21 is restricted from moving toward the second sheet 22 by contacting the spacer 80. The spacer 80 can separate the first inner surfaces 201 and 202 from each other. Therefore, the illustrated spacer 80 can expand the flow path PT in the bag 20 in the first direction DX.

[0086] The two spacers 80 shown in FIG. 2 each extend in the longitudinal direction DL. The spacer 80 shown in FIG. 2 includes a base portion 81 and a protruding portion 82 protruding from the base portion 81. In the illustrated spacer 80, the base portion 81 and the protruding portion 82 are connected to each other seamlessly. In FIG. 2, each spacer 80 contacts the heat seal layer 35 of the second sheet 22 from the base portion 81. The spacer 80 may be joined to the heat seal layer 35 by being pressed against the heat seal layer 35 in a hot state. As shown in FIG. 3, the second sheet 22 may be welded to the spacer 80 at the heat seal layer 35. In FIG. 2, each spacer 80 includes two protruding portions 82 protruding from the base portion 81. Each protruding portion 82 extends in the second direction DY. In each spacer 80, the two protruding portions 82 are spaced apart from each other in the third direction DZ.

[0087] The spacer 80 may contain a resin such as polypropylene, high-density polyethylene, low-density polyethylene, linear low-density polyethylene, etc. The glass transition temperature of the resin contained in the spacer 80 may be higher than the glass transition temperature of the resin contained in the heat seal layer 35 of the second sheet 22.

[0088] 7 to 9, the operation of the heat exchanger 10 will be described with reference to the heat exchanger 10 of Fig. 1 disposed within the electrical appliance 1. The illustrated heat exchanger 10, together with the electrical appliance 1, constitutes an electrical appliance with a heat exchanger.

[0089] 7 to 9 is disposed in a serpentine state between a plurality of heat exchange objects 2. The serpentine heat exchanger 10 is bent at a plurality of locations around an axis parallel to the third direction DZ.

[0090] 7 shows four heat exchange objects 2. A heat exchanger 10 is disposed between adjacent heat exchange objects 2. The illustrated heat exchange objects 2 extend in a direction parallel to the third direction DZ. The heat exchange objects 2 have a longitudinal direction parallel to the third direction DZ. The heat exchange objects 2 have the same shape. The heat exchange objects 2 included in the electrical appliance 1 may be batteries or cooling fins.

[0091] The heat exchanger 10 shown in Figures 7 to 9 has a first bent portion 91 bent in a first direction about an axis parallel to the third direction DZ, and a second bent portion 92 bent in a second direction opposite to the first direction. Figure 8 shows an enlarged view of the first bent portion 91. Figure 9 shows an enlarged view of the second bent portion 92. The illustrated heat exchanger 10 is bent 90 degrees clockwise around the axis at the first bent portion 91. The illustrated heat exchanger 10 is bent 90 degrees counterclockwise around the axis at the second bent portion 92.

[0092] In the heat exchanger 10 shown in FIG. 8 , the length of the first bent portion 91 differs between the first inner surface 201 and the second inner surface 202. The first inner surface 201 shown in FIG. 8 is radially farther from the axis AS1 than the second inner surface 202 at the first bent portion 91. As a result, the circumferential length of the first inner surface 201 is greater than the circumferential length of the second inner surface 202 at the first bent portion 91. The radial direction in FIG. 8 is a direction perpendicular to the direction in which the axis AS1 extends (third direction DZ) and passing through the axis AS1. As will be described later with reference to FIG. 8 , the first bent portion 91 is a portion that moves the first member 50 relative to the second member 60 toward the first end of the wall portion 70.

[0093] In the heat exchanger 10 shown in FIG. 9 , the length of the second bent portion 92 differs between the first inner surface 201 and the second inner surface 202. The second inner surface 202 shown in FIG. 9 is radially farther from the axis AS2 than the first inner surface 201 at the second bent portion 92. As a result, in the second bent portion 92, the circumferential length of the second inner surface 202 is greater than the circumferential length of the first inner surface 201, unlike the first bent portion 91. The radial direction in FIG. 9 is a direction perpendicular to the direction in which the axis AS2 extends (third direction DZ) and passing through the axis AS2. As will be described later with reference to FIG. 9 , the second bent portion 92 is a portion that moves the first member 50 relative to the second member 60 toward the second end 72 of the wall portion 70.

[0094] The heat exchanger 10 shown in FIG. 7 has a plurality of first bent portions 91 and a plurality of second bent portions 92. The number of first bent portions 91 is the same as the number of second bent portions 92. The sum of the circumferential differences between the first inner surface 201 and the second inner surface 202 in the plurality of first bent portions 91 is the same as the sum of the circumferential differences between the first inner surface 201 and the second inner surface 202 in the plurality of second bent portions 92. In particular, in the illustrated heat exchanger 10, the circumferential differences between the first inner surface 201 and the second inner surface 202 are the same among the plurality of first bent portions 91. Furthermore, the circumferential differences between the first inner surface 201 and the second inner surface 202 are the same among the plurality of second bent portions 92.

[0095] 7, the heat exchanger 10 is arranged in a serpentine manner between the heat exchange objects 2, thereby forming a moving portion 93 where the first member 50 moves relative to the second member 60. In the moving portion 93 shown in FIGS. 7 to 9, the linear protrusions 52 are held by the linear recesses 62. Therefore, in the illustrated heat exchanger 10, the wall portion 70 is formed by the first member 50 and the second member 60 even in the moving portion 93.

[0096] In Figure 8, multiple line segments extending between the first inner surface 201 and the second inner surface 202 are indicated by two-dot chain lines. Each line segment indicates a portion that is equidistant from the first end 71 of the wall portion 70 in the second longitudinal direction DL2. Each line segment connects a portion that is a certain length away from the first connection portion 711 of the first inner surface 201 in the second longitudinal direction DL2 to a portion that is the same length away from the second connection portion 712 of the second inner surface 202 in the second longitudinal direction DL2. In Figure 8, ten line segments L1 to L10 that are spaced apart in the second longitudinal direction DL2 are indicated by two-dot chain lines.

[0097] Of the ten line segments L1 to L10 shown in FIG. 8, five line segments L6 to L10 are located in the moving portion 93. Of the ten line segments L1 to L10 shown, the other five line segments L1 to L5 are not located in the moving portion 93. In the illustrated heat exchanger 10, the first member 50 moves in the second longitudinal direction DL2 toward the first end 71 relative to the second member 60 at the first bent portion 91. Due to the movement of the first member 50 at the first bent portion 91, the five line segments L6 to L10 shown are inclined with respect to the thickness direction of the bag 20 compared to the other five line segments L1 to L5. Furthermore, of the five line segments L6 to L10 shown, the inclination of line segments L7 to L10 with respect to the thickness direction of the bag 20 is greater than that of line segment L6 located at the second bent portion 92.

[0098] 9, multiple line segments extending between the first inner surface 201 and the second inner surface 202 are indicated by two-dot chain lines. Each line segment indicates a portion that is equidistant from the second end 72 of the wall portion 70 in the second longitudinal direction DL2. Each line segment connects a portion that is a certain length away from the third connecting portion 721 of the first inner surface 201 in the second longitudinal direction DL2 to a portion that is the same length away from the fourth connecting portion 722 of the second inner surface 202 in the second longitudinal direction DL2. In FIG. 9, ten line segments L11 to L20 that are spaced apart in the second longitudinal direction DL2 are indicated by two-dot chain lines.

[0099] Of the ten line segments L11 to L20 shown in FIG. 9 , five line segments L16 to L20 are located in the moving portion 93. Of the ten line segments L11 to L20 shown, the other five line segments L11 to L15 are not located in the moving portion 93. In the illustrated heat exchanger 10, the first member 50 moves in the second longitudinal direction DL2 toward the second end 72 relative to the second member 60 in the second portion 92. Due to the movement of the first member 50 in the second portion 92, the five line segments L11 to L15 shown in the figure have a reduced inclination with respect to the thickness direction of the bag 20 compared to the other five line segments L16 to L20. Furthermore, of the five line segments L16 to L20 shown in the figure, the inclination of the line segment L16 located at the second bend portion 92 with respect to the thickness direction of the bag 20 is reduced compared to the other line segments L17 to L20.

[0100] In a conventional heat exchanger including a bag containing a fluid, a first inner surface and a second inner surface facing each other in the thickness direction of the bag are joined together at a wall that divides the fluid flow path. In the conventional heat exchanger bag, a joint is formed at the wall where the sheet forming the first inner surface and the sheet forming the second inner surface are joined together. In the conventional heat exchanger, the wall restricts the movement of the sheet forming the first inner surface and the sheet forming the second inner surface relative to each other.

[0101] In order to improve the temperature management function of a heat exchanger, it is necessary to increase the area of ​​the portion that comes into contact with the heat exchange target. The heat exchanger is arranged in a bent state to conform to the shape of the heat exchange target. The heat exchanger is provided with a bent portion that is bent around an axis that extends in a direction non-parallel to the thickness direction of the bag.

[0102] At the bent portion of the heat exchanger, a difference in circumferential length occurs between the sheet forming the first inner surface and the sheet forming the second inner surface. In conventional heat exchangers, the sheet forming the first inner surface and the sheet forming the second inner surface are restricted from moving relative to each other by the wall portion, even when a difference in circumferential length occurs between them. In conventional heat exchangers, the sheet located on the inner periphery of the bent portion is left over, causing wrinkles. Conventional heat exchangers including bent portions may be placed in a wrinkled state.

[0103] Wrinkles are likely to occur in the storage section that stores the fluid. In the storage section, the sheet that constitutes the first inner surface and the sheet that constitutes the second inner surface are not restricted from moving relative to each other, making wrinkles likely to occur. When wrinkles occur in the storage section, the first inner surface and the second inner surface may approach each other in the storage section. The approach of the first inner surface and the second inner surface may narrow the flow path within the bag. When wrinkles occur in the storage section, the first inner surface and the second inner surface may come into contact with each other in the storage section. The contact of the first inner surface and the second inner surface may block the flow path within the bag.

[0104] In conventional heat exchangers that are installed with wrinkled bags, the flow path can be reduced or blocked, significantly reducing the fluid flow rate within the bag. Therefore, conventional heat exchangers that are installed with bent portions can have reduced temperature management capabilities.

[0105] The heat exchanger 10 shown in FIGS. 1 to 9 includes a first member 50 and a second member 60 disposed within a bag 20. The first member 50 is fixed to a first inner surface 201. The second member 60 is fixed to a second inner surface 202. The first member 50 includes linear protrusions 52 protruding toward the second inner surface 202. The second member 60 includes linear recesses 62 capable of holding the linear protrusions 52. The first member 50 and the second member 60 form a wall 70 when the linear protrusions 52 are held in the linear recesses 62. The wall 70 divides the flow paths PT within the bag 20. With the linear protrusions 52 held in the linear recesses 62, the first member 50 is movable in a second longitudinal direction DL2 relative to the second member 60.

[0106] When the heat exchanger 10 shown in FIGS. 1 to 9 is bent and positioned, the first member 50 and the second member 60 can move relative to each other while maintaining the wall portion 70 by retaining the linear protrusions 52 with the linear recesses 62. The outermost one of the first member 50 and the second member 60 moves relative to the innermost one. At the first bent portion 91 shown in FIG. 8 , the first member 50 moves relative to the second member 60 in the second longitudinal direction DL2 toward the first end 71. The movement of the first member 50 relative to the second member 60 prevents the second sheet 22 located on the inner side from wrinkling in FIG. 8 . Meanwhile, at the second bent portion 92 shown in FIG. 9 , the second member 60 moves relative to the first member 50 in the second longitudinal direction DL2 toward the second end 72. The movement of the second member 60 relative to the first member 50 prevents the first sheet 21 located on the inner side from wrinkling in FIG. 9 .

[0107] 1 to 9, the occurrence of shrinkage and blockage of the flow path PT described above can be suppressed by suppressing the occurrence of wrinkles in the first sheet 21 and the second sheet 22. The illustrated heat exchanger 10 allows a stable flow of fluid through the flow path PT within the bag 20. Therefore, even if the illustrated heat exchanger 10 is placed in the electrical appliance 1 with a bent portion provided, a decrease in the temperature management function can be suppressed.

[0108] In particular, in the heat exchanger 10 shown in FIG. 1 , the bag 20 has a width direction perpendicular to the second longitudinal direction DL2, which is the longitudinal direction of the linear protrusions 52. The first member 50 and the second member 60 are located on the center line WL in the width direction of the bag 20. In the illustrated heat exchanger 10, the first member 50 and the second member 60 are spaced apart from joints 20p located at both ends of the bag 20 in the width direction. The first sheet 21 and the second sheet 22 are restricted from moving relative to each other at the joints 20p. By separating the first member 50 and the second member 60 from the joints 20p in the width direction of the bag 20, restriction on the movement of the first sheet 21 and the second sheet 22 relative to each other can be suppressed. Therefore, in the illustrated heat exchanger 10, movement of the first member 50 and the second member 60 relative to each other is promoted, effectively suppressing the occurrence of wrinkles.

[0109] 1 to 9 , the force with which the linear protrusions 52 hold the linear recesses 62 is smaller than the bonding force between the first member 50 and the heat seal layer 35 of the first sheet 21. Furthermore, the force with which the linear protrusions 52 hold the linear recesses 62 is smaller than the bonding force between the second member 60 and the heat seal layer 35 of the second sheet 22. In the illustrated heat exchanger 10, when the first sheet 21 and the second sheet 22 are pulled away from each other in the first direction DX, the linear recesses 62 detach from the linear protrusions 52. However, the first member 50 does not detach from the first sheet 21, and the second member 60 does not detach from the second sheet 22.

[0110] The bag 20 may be pulled as described above due to various factors, such as an increase in the pressure of the fluid flowing through the bag 20. The bag 20 may be damaged by the separation of the first member 50 from the first sheet 21 or the separation of the second member 60 from the second sheet 22. In the illustrated bag 20, damage to the barrier layer 34 included in the first sheet 21 and the second sheet 22 may cause problems such as leakage of fluid outside the bag 20. In the illustrated heat exchanger 10, the separation of the linear protrusions 52 from the linear recesses 62 suppresses damage to the first sheet 21 and the second sheet 22, including the barrier layer 34, and suppresses leakage of fluid outside the bag 20.

[0111] The magnitude relationship between the holding force with which the linear recess 62 holds the linear protrusion 52, the bonding force between the first member 50 and the heat seal layer 35, and the bonding force between the second member 60 and the heat seal layer 35 is determined by the following method.

[0112] A sample is prepared. Two sheets including a heat seal layer 35 are prepared. Each sheet has a dimension of 50 mm or more in the longitudinal direction. Each sheet has a dimension of 50 mm or more in the width direction. One of the two sheets is a sheet that forms the first inner surface 201. The other of the two sheets is a sheet that forms the second inner surface 202.

[0113] The first member 50 is fixed to one of the sheets. The first member 50 is fixed across the entire width of the one of the sheets. The one of the sheets is welded to the first member 50 via the heat seal layer 35. In the first member 50 fixed to the one of the sheets, the linear protrusions 52 are at least partially located on the center line in the longitudinal direction of the one of the sheets. In the one of the sheets, the longitudinal direction of the linear protrusions 52 extends parallel to the width direction of the one of the sheets.

[0114] The second member 60 is fixed to the other sheet. The second member 60 is fixed across the entire width of the other sheet. The other sheet is welded to the second member 60 via the heat seal layer 35. In the second member 60 fixed to the other sheet, the linear recess 62 is at least partially located on the center line in the longitudinal direction of the other sheet. In the other sheet, the longitudinal direction of the linear recess 62 extends parallel to the width direction of the other sheet.

[0115] The linear convex portion 52 of the first member 50 fixed to one sheet is held by the linear concave portion 62 of the second member 60 fixed to the other sheet. In this manner, a sample is produced. The sample includes a sheet forming the first inner surface 201, a sheet forming the second inner surface 202, the first member 50 fixed to the first inner surface 201, and the second member 60 fixed to the second inner surface 202.

[0116] The prepared sample is subjected to a 180-degree peel test by the following method. The 180-degree peel test includes a first test and a second test. The order of the first and second tests does not matter.

[0117] In the first test, one longitudinal end of one sheet is clamped in one chuck of a tensile tester (Shimadzu Corporation's "Autograph AGS-X Series" conforming to JIS B 7721:2018). In the first test, the longitudinal end of the other sheet located on the same side as the one end is clamped in the other chuck of the tensile tester. The sample in this state is pulled at a pulling rate of 200 mm / min under a condition of 25 degrees Celsius. The above first test is performed on five different samples.

[0118] In the second test, the other longitudinal end of one sheet is clamped in one chuck of the tensile tester. The other longitudinal end of the other sheet, located on the same side as the one end, is clamped in the other chuck of the tensile tester. The sample in this state is pulled at a pulling rate of 200 mm / min under a temperature of 25 degrees Celsius. This second test is performed on five different samples.

[0119] When the holding force of the linear recess 62 to hold the linear protrusion 52 is smaller than both the bonding force between the first member 50 and the heat seal layer 35 of the first sheet 11 and the bonding force between the second member 60 and the heat seal layer 35 of the second sheet 22, the sample is in the following state. That is, in five samples subjected to the first test and five samples subjected to the second test, the linear protrusion 52 detaches from the linear recess 62 across the entire width of the sample. However, in five samples subjected to the first test and five samples subjected to the second test, the first member 50 does not detach from one of the sheets. Furthermore, in five samples subjected to the test and five samples subjected to the second test, the second member 60 does not detach from the other sheet.

[0120] In the embodiment described above, the heat exchanger 10 includes a bag 20, a first member 50, a second member 60, and an inlet / outlet member 40. The bag 20 includes a first inner surface 201 and a second inner surface 202 that face each other in the first direction DX. The first member 50 is disposed within the bag 20 and fixed to the first inner surface 201. The second member 60 is disposed within the bag 20 and fixed to the second inner surface 202. The inlet / outlet member 40 forms an inlet / outlet 40x for fluid into the bag 20. The first member 50 includes a linear protrusion 52 that protrudes toward the second inner surface 202. The second member 60 includes a linear recess 62 that can hold the linear protrusion 52. The first member 50 and the second member 60 form a wall 70 that divides a flow path PT within the bag 20 when the linear protrusion 52 is held in the linear recess 62. With the linear protrusions 52 held in the linear recesses 62 , the first member 50 is movable relative to the second member 60 in the longitudinal direction of the linear protrusions 52 .

[0121] According to this embodiment, in the heat exchanger 10 with the bent portion provided, the wall portion 70 is formed by the first member 50 and the second member 60 that move relative to each other. The first member 50 and the second member 60 that move relative to each other suppress the occurrence of wrinkles in the sheet that forms the first inner surface 201 and the sheet that forms the second inner surface 202. In the heat exchanger 10 according to this embodiment, the wall portion 70 separates the flow paths PT and can suppress the occurrence of shrinkage and blockage of the flow paths PT. Therefore, the heat exchanger 10 according to this embodiment can improve the temperature management function.

[0122] Although one embodiment has been described with reference to specific examples, the above-described specific examples do not limit the present invention. The above-described embodiment can be implemented with various other specific examples, and various omissions, substitutions, changes, additions, etc. can be made without departing from the spirit of the present invention.

[0123] The above-described bag 20 was composed of a first sheet 21 and a second sheet 22. The first sheet 21 and the second sheet 22 included a first resin layer 31 and a second resin layer 32. The first sheet 21 and the second sheet 22 included two resin layers. The sheets constituting the bag 20 may include three or more resin layers. The sheets constituting the bag 20 may include a third resin layer. In a sheet including the first resin layer 31, the second resin layer 32, and the third resin layer, the barrier layer 34 may be disposed between the first resin layer 31 and the second resin layer 32, or may be disposed between the second resin layer 32 and the third resin layer. Alternatively, the sheets constituting the bag 20 may include one resin layer.

[0124] As shown in Fig. 10, the bag 20 may be formed from a single sheet. The first inner surface 201 and the second inner surface 202 may be formed by folding a single sheet 23. The illustrated bag 20 is a three-sided seal type pouch. In the illustrated bag 20, adjacent portions of the single sheet 23 form the first inner surface 201 and the second inner surface 202.

[0125] 10 to 12, which are referred to in order to explain one example of the modification, the same reference numerals as those used for the corresponding parts in the above-mentioned specific example are used for parts that can be configured in the same way as the specific example described in Figures 1 to 9. In Figures 10 to 12, the description of parts that overlap with the above-mentioned specific example is omitted.

[0126] The bag 20 is not limited to the four-side seal type and three-side seal type described above, but may be various other pouches such as a pillow type or a gusset type.

[0127] As shown in Fig. 10, the heat exchanger 10 may include a plurality of spacers 80 spaced apart in the second longitudinal direction DL2. The heat exchanger 10 shown in Fig. 10 can be easily bent around an axis extending in the third direction DZ from a portion in the second direction DY where no spacers 80 are formed. According to the heat exchanger 10 shown in Fig. 10, the heat exchanger 10 can be easily bent to fit the shape of the heat exchange target, and the spacers 80 can stably secure the flow path PT.

[0128] In the heat exchanger 10 shown in Fig. 10, the inlet / outlet member 40 is fixed to the first inner surface 201. As shown in Fig. 10, the inlet / outlet member 40 does not have to include the protrusion 45. In the heat exchanger 10 shown in Fig. 10, even if the inlet / outlet member 40 does not include the protrusion 45, the flow path PT within the bag 20 can be expanded in the first direction DX at the portion of the bag 20 where the inlet / outlet member 40 is attached.

[0129] The spacer 80 described above includes a base portion 81 and two protrusions 82 protruding from the base portion 81. The spacer 80 may have a shape other than the above-described shape. The spacer 80 shown in FIG. 11 includes a base portion 81 and one protrusion 82 protruding from the base portion 81. The illustrated spacer 80 is fixed to the second inner surface 202 from the base portion 81.

[0130] The above-described inlet / outlet member 40 includes a claw portion 40n capable of holding a hose attachment port (not shown). Instead of the claw portion 40n, the inlet / outlet member 40 may include a threaded portion 40s capable of holding a hose attachment port, as shown in FIG. 11 . In the heat exchanger 10 shown in FIG. 11 , the hose attachment port is fastened to the threaded portion 40s by rotating the hose about an axis extending in the first direction DX. Fastening the hose to the inlet / outlet member 40 may prevent the hose from coming off the inlet / outlet member 40.

[0131] In the heat exchanger 10 described above, the inlet / outlet member 40 is attached to the sheet that forms the first inner surface 201. The inlet / outlet member 40 protrudes from the bag 20 in the first direction DX. However, this is not limiting, and the inlet / outlet member 40 may be attached to the bag 20 in a state where it is sandwiched between the sheet that forms the first inner surface 201 and the sheet that forms the second inner surface 202, as shown in FIG. 12 . The inlet / outlet member 40 may protrude from the bag 20 in a direction that is not parallel to the first direction DX. As an example, the inlet / outlet member 40 may protrude in a direction parallel to the second longitudinal direction DL2, as shown in FIG. 12 .

[0132] The plurality of inlet / outlet members 40 arranged between the sheet forming the first inner surface 201 and the sheet forming the second inner surface 202 may be connected to each other. The two inlet / outlet members 40 may be integrally molded. The two inlet / outlet members 40 shown in FIG. 12 are connected to each other by a connecting portion 46. The illustrated connecting portion 46 overlaps the joint portion 20p of the bag 20 in the first direction DX. By connecting the plurality of inlet / outlet members 40 to each other, it is possible to easily produce a bag 20 including inlet / outlet members 40 that open to the inside.

Claims

1. A heat exchanger comprising: a bag including a first inner surface and a second inner surface facing each other in a first direction; a first member disposed in the bag and fixed to the first inner surface; a second member disposed in the bag and fixed to the second inner surface; and an injection / extraction member forming an injection / extraction port for fluid into / from the bag, wherein the first member includes a linear convex portion protruding toward the second inner surface, the second member includes a linear concave portion capable of holding the linear convex portion, the first member and the second member form a wall portion that divides a flow path in the bag when the linear convex portion is held in the linear concave portion, and the first member is movable in the longitudinal direction of the linear convex portion with respect to the second member when the linear convex portion is held in the linear concave portion.

2. The heat exchanger according to claim 1, wherein the first member is movable in the first direction with respect to the second member when the linear convex portion is held in the linear concave portion.

3. The heat exchanger according to claim 1, wherein the linear convex portion is detachable from the linear concave portion.

4. The bag includes a heat-sealing layer forming the first inner surface, the first member is joined to the heat-sealing layer, and the holding force by which the linear concave portion holds the linear convex portion is smaller than the joining force between the first member and the heat-sealing layer. The heat exchanger according to claim 1.

5. The bag includes a heat-sealing layer forming the second inner surface, the second member is joined to the heat-sealing layer, and the holding force by which the linear concave portion holds the linear convex portion is smaller than the joining force between the first member and the heat-sealing layer. The heat exchanger according to claim 1.

6. The heat exchanger according to claim 1, further comprising a spacer fixed to one of the first inner surface and the second inner surface in the bag and protruding toward the other of the first inner surface and the second inner surface.

7. The heat exchanger according to claim 6, wherein the injection / extraction member opens in the first direction, and the spacer overlaps with the injection / extraction member in the first direction.

8. The injection / extraction member is fixed to one of the first inner surface and the second inner surface and opens in the first direction, and the injection / extraction member includes a protruding portion protruding in the first direction toward the other of the first inner surface and the second inner surface in the bag. The heat exchanger according to claim 1.

9. The bag has a width direction in a direction orthogonal to the longitudinal direction of the linear convex portion, and the first member and the second member are located on the center line in the width direction of the bag. The heat exchanger according to claim 1.

10. The heat exchanger according to claim 9, comprising two injection / extraction members, one of the two injection / extraction members being an injection member that forms an injection port for the fluid into the bag, the other of the two injection / extraction members being an extraction member that forms an extraction port for the fluid from the bag, the flow path including a portion extending in the longitudinal direction from the injection member and a portion extending in the longitudinal direction toward the extraction member, and the wall portion being located between the injection member and the extraction member in the width direction.

11. An electrical appliance with a heat exchanger, comprising the heat exchanger according to any one of claims 1 to 10 and an electrical appliance having a portion in contact with the heat exchanger.

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