Heat exchanger and electric appliance with the same

Abstract

To improve a temperature control function of a heat exchanger.SOLUTION: A heat exchanger 10 includes a bag 20, a first member 50, a second member 60, and an inlet and outlet member 40. The first member 50 is arranged in the bag 20 and is fixed to a first inner surface 201 of the bag 20. The second member 60 is arranged in the bag 20 and is fixed to a second inner surface 202 of the bag 20. The inlet and outlet member 40 forms an inlet and outlet port of fluid to 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 recession 62 which can hold the linear protrusion 52. The first member 50 and the second member 60 form a wall 70 which partitions a flow passage PT in the bag 20 when the linear protrusion 52 is held by the linear recession 62. The first member 50 is movable with respect to the second member 60 in a longitudinal direction of the linear protrusion 52 when the linear protrusion 52 is held by the linear recession 62.SELECTED DRAWING: Figure 8

Description

Technical Field

[0001] The present disclosure relates to a heat exchanger and an electrical appliance equipped with the heat exchanger.

Background Art

[0002] As disclosed in Patent Document 1, a heat exchanger including a bag for containing a fluid is known. The heat exchanger performs heat exchange between the fluid flowing in the bag and the object to be heat-exchanged. The heat exchanger heats or cools the object to be heat-exchanged. The heat exchanger has a temperature control function for controlling the temperature of the object to be heat-exchanged.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the heat exchanger disclosed in Patent Document 1, the bag includes a first inner surface and a second inner surface facing each other. The heat exchanger includes a wall portion located inside the bag and partitioning the flow path of the fluid. 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.

[0005]

Means for Solving the Problem

[0006] The heat exchanger according to an embodiment of the present disclosure includes 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 that forms an injection / extraction port for a fluid to the bag. 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, the first member is movable in the longitudinal direction of the linear convex portion with respect to the second member in a state where the linear convex portion is held in the linear concave portion.

Advantages of the Invention

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

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

DETAILED DESCRIPTION OF THE INVENTION

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

[11] .

[0010] [1] 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, An injection and discharge member forming an injection and discharge port for a fluid to the bag, 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, The first member is movable in the longitudinal direction of the linear convex portion with respect to the second member in a state where the linear convex portion is held in the linear concave portion, the heat exchanger.

[0011] [2] The heat exchanger according to [1], wherein the first member is movable in the first direction with respect to the second member in a state where the linear convex portion is held in the linear concave portion.

[0012] [3] The linear convex portion of the heat exchanger according to [1] or [2] is detachable from the linear concave portion.

[0013] [4] The bag includes a heat-sealing layer that forms the first inner surface, The first member is joined to the heat-sealing layer, In the heat exchanger according to any one of [1] to [3], the holding force with 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.

[0014] [5] The bag includes a heat-sealing layer that forms the second inner surface, The second member is joined to the heat-sealing layer, In the heat exchanger according to any one of [1] to [4], the holding force with 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.

[0015] [6] The heat exchanger according to any one of [1] to [5] includes a spacer that is fixed to one of the first inner surface and the second inner surface inside the bag and protrudes toward the other of the first inner surface and the second inner surface.

[0016] [7] The injection / extraction member opens in the first direction, In the heat exchanger according to [6], the spacer overlaps with the injection / extraction member in the first direction.

[0017] [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, The heat exchanger according to any one of [1] to [7] includes a protruding portion that protrudes in the first direction toward the other of the first inner surface and the second inner surface inside the bag.

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

[0019]

[10] Two of the injection / extraction members are provided. The bag has a width direction in a direction orthogonal to the longitudinal direction of the linear convex portion. One of the two injection / extraction members is an injection member that forms an injection port for the fluid into the bag. The other of the two injection / extraction members is an extraction member that forms an extraction port for the fluid from the bag. The flow path includes a portion extending in the longitudinal direction from the injection member and a portion extending in the longitudinal direction toward the extraction member. The wall portion is a heat exchanger according to any one of [1] to [9] located between the injection member and the extraction member in the width direction.

[0020]

[11] A household appliance including any one of the heat exchangers according to [1] to

[10] , and a household 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, for the sake of illustration and easy understanding, the scale, dimensional ratios, etc. are exaggerated from those of the actual objects as appropriate. Note that the configurations shown in some of the drawings may be omitted in other drawings.

[0022] In the following description, terms such as "orthogonal" and "identical" for specifying shapes, geometric conditions, and their degrees, lengths, and angles are not limited to strict meanings. These are interpreted to include ranges in which similar functions can be expected.

[0023] The directions common among the drawings are indicated by arrows with the same reference numerals in each drawing. In each direction, the tip side of the arrow is the first side. In each direction, the side opposite to the first side, i.e., the base end side 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 plane of the paper 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 plane of the paper is indicated by a symbol with an X in a circle, as shown in FIG. 2 for example.

[0024] FIG. 1 is a plan view of the heat exchanger 10. The heat exchanger 10 performs heat exchange with a heat exchange target that contacts the heat exchanger 10. The heat exchanger 10 has a temperature control function for controlling the temperature of the heat exchange target. The heat exchanger 10 may 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 the 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 not parallel to the thickness direction. The longitudinal direction of the illustrated bag 20 is parallel to the second direction DY that is orthogonal to the first direction DX. The longitudinal direction of the bag 20 may be referred to as the first longitudinal direction DL1. The bag 20 has a width direction that is not parallel to both the thickness direction and the longitudinal direction (the first longitudinal direction DL1). The width direction of the illustrated bag 20 is parallel to the third direction DZ that is orthogonal to both the first direction DX and the second direction DY. In FIG. 1, as a plan view of the heat exchanger 10, the heat exchanger 10 as observed from the first side in the third direction DZ is shown.

[0026] The bag 20 shown in FIGS. 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 the heat exchange target, the fluid flowing inside the bag 20 may be cooled. When the heat exchanger 10 cools the heat exchange target, the fluid flowing inside the bag 20 may be heated. The fluid may contain water. The fluid may contain antifreeze. The fluid may contain an organic compound.

[0027] The heat exchanger 10 shown in FIG. 1 includes an injection and discharge member 40 that forms an injection and discharge port for fluid to the bag 20. The injection and discharge port for fluid may be an injection port for fluid. The injection and discharge port for fluid may be a discharge port for fluid. 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 located within the bag 20. The heat exchanger 10 includes a first member 50 and a second member 60 located within the bag 20.

[0028] The heat exchanger 10 shown in FIG. 1 includes two injection and discharge members 40. One injection and discharge member 40 is an injection member 41 that forms an injection port for fluid to the bag 20. The other injection and discharge member 40 is a discharge member 42 that forms a discharge port for fluid from the bag 20. The illustrated bag 20 opens to the first side in the first direction DX at the portion where the injection member 41 is attached. The bag 20 opens in the same direction as the injection port in the first direction DX at the portion where the discharge member 42 is attached. Fluid flows into the bag 20 from the injection member 41. Fluid is discharged from the bag 20 through the discharge member 42. The illustrated wall portion 70 is located between the injection member 41 and the discharge member 42 in the width direction of the bag 20.

[0029] The bag 20 shown in FIGS. 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 the first direction DX. In the illustrated bag 20, the first sheet 21 is a single-sheet. The second sheet 22 is a single-sheet different from the first sheet 21.

[0030] The bag 20 shown in FIGS. 1 and 2 includes a joint portion 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 portion 20p. In the heat exchanger 10 shown in FIG. 1, the joint portion 20p is located at the peripheral portion of the bag 20. In the illustrated bag 20, a housing portion 20c for housing fluid is formed in the central portion surrounded by the joint portion 20p.

[0031] Note that "joining" includes "adhering", "bonding", and "welding".

[0032] The bag 20 shown in FIG. 2 forms 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 accommodation space in the accommodation portion 20c. The first inner surface 201 and the second inner surface 202 are in contact with each other at the joint portion 20p.

[0033] The first sheet 21 and the second sheet 22 shown in FIG. 2 have the same layer structure as each other. Different from the illustration, the first sheet 21 and the second sheet 22 may have different layer structures from each other. Hereinafter, mainly with reference to FIG. 3, the layer structure of the first sheet 21 will be described.

[0034] 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 a first resin layer 31, a barrier layer 34, a second resin layer 32, and a heat seal layer 35 in this order from the first surface 211 toward the second surface 212. 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.

[0035] As shown in FIG. 3, the first sheet 21 may include a bonding layer 36. The bonding layer 36 contacts the layers adjacent 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. 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, phenol 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 use one of these materials alone. The bonding layer 36 may use a combination of two or more of these materials.

[0036] The first bonding layer 361 shown in FIG. 3 is located between the first resin layer 31 and the barrier layer 34. The first bonding layer 361 contacts the first resin layer 31 and the barrier layer 34. The first bonding layer 361 restricts the relative movement of the first resin layer 31 and the barrier layer 34.

[0037] The second bonding layer 362 shown in FIG. 3 is located between the barrier layer 34 and the second resin layer 32. The second bonding layer 362 contacts the barrier layer 34 and the second resin layer 32. The second bonding layer 362 restricts the relative movement of the barrier layer 34 and the second resin layer 32.

[0038] The third bonding layer 363 shown in FIG. 3 is located between the second resin layer 32 and the heat-seal layer 35. The third bonding layer 363 contacts the second resin layer 32 and the heat-seal layer 35. The third bonding layer 363 restricts the relative movement of the second resin layer 32 and the heat-seal layer 35.

[0039] 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 material layer. The first resin layer 31 may have electrical insulation properties. The first resin layer 31 may electrically insulate the heat exchange target and the flow path. The illustrated first resin layer 31 is in the form of a film. As the first resin layer 31, a resin film may be used. The first resin layer 31 may be a biaxially stretched 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 resin such as polyethylene terephthalate (PET). The thickness of the first resin layer 31 may be 10 μm or more, and may be 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.

[0040] 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 flexural resistance and impact resistance of the first sheet 21. The illustrated second resin layer 32 is in the form of a film. As the second resin layer 32, a resin film may be used. 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 resin. The thickness of the second resin layer 32 may be 10 μm or more, and may be 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.

[0041] 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 having barrier properties suppresses the inflow of water vapor and the like into the flow path. The barrier layer 34 having barrier properties suppresses the outflow of fluid from the flow path. The barrier layer 34 may have a function of improving the tensile strength of the first sheet 21.

[0042] The barrier layer 34 may be a metal foil. The material of the metal foil may include one or more of aluminum alloy, stainless steel, and titanium steel. The barrier layer 34 may be a vapor deposition film. The barrier layer 34 may be a vapor deposition film of a metal such as aluminum, chromium, or tin. The barrier layer 34 may be a vapor deposition film of an inorganic oxide such as silicon dioxide, zirconia, or aluminum oxide. The barrier layer 34 may be a vapor deposition film of a carbon-containing inorganic oxide.

[0043] The heat seal layer 35 shown in FIG. 3 has heat weldability to weld to other members in a high-temperature state. The "high-temperature state" in which the heat seal layer 35 has heat weldability may be 100 degrees Celsius or higher, 150 degrees Celsius or higher, 170 degrees Celsius or higher, or 180 degrees Celsius or higher. The heat seal layer 35 of the illustrated first sheet 21 is welded to the heat seal layer 35 of the second sheet 22 at the peripheral portion of the heat exchanger 10. From the viewpoint of improving the heat weldability with other members, the heat seal layer 35 may include one or more of polypropylene, high-density polyethylene, low-density polyethylene, and linear low-density polyethylene-based resins.

[0044] The above description of the layer configuration of the first sheet 21 also applies equally to the layer configuration 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 to 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 the above-described first resin layer 31, barrier layer 34, second resin layer 32, and heat seal layer 35 in this order from the first surface 221 toward the second surface 222. 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 above-described first bonding layer 361, second bonding layer 362, and third bonding layer 363 as the bonding layer 36.

[0045] In addition, as shown in FIG. 3, in the bag 20 in which both the first inner surface 201 and the second inner surface 202 are formed by the heat-sealing layer 35, the heat-sealing layer 35 forming the first inner surface 201 may be referred to as the first heat-sealing layer 351. The heat-sealing layer 35 forming the second inner surface 202 may be referred to as the second heat-sealing layer 352.

[0046] The inlet / outlet member 40 shown in FIGS. 1 and 2 is cylindrical. The inlet / outlet member 40 is provided with 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.

[0047] 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 the injection member 41. The other of the two inlet / outlet members 40 is the outlet member 42. The two inlet / outlet members 40 are each joined to the first sheet 21. The two inlet / outlet members 40 are each fixed to the first inner surface 201. The inlet / outlet member 40 may be manufactured by injection molding. That is, the inlet / outlet member 40 may be manufactured by solidifying molten injection resin.

[0048] In the heat exchanger 10 shown in FIGS. 1 and 2, the fluid flowing into the bag 20 passes through the inlet / outlet member 40 in the order of the first opening 40a and the second opening 40b. The fluid flowing into the bag 20 passes through the injection member 41 in the order of the first opening 40a and the second opening 40b. The fluid flowing out of the bag 20 passes through the inlet / outlet member 40 in the order of the second opening 40b and the first opening 40a. The fluid flowing out of the bag 20 passes through the outlet member 42 in the order of the second opening 40b and the first opening 40a.

[0049] A hose (not shown) may be attached to the injection / extraction member 40. The fluid may be supplied from the hose. As shown in FIG. 2, the injection / extraction member 40 may include a claw portion 40n capable of holding the attachment port of the hose. The illustrated claw portion 40n extends in a direction non-parallel to the direction (the first direction DX in FIG. 2) in which it protrudes from the bag 20 of the injection / extraction member 40. In the illustrated heat exchanger 10, when the attachment port of the hose is held by the claw portion 40n, the hose is prevented from coming off the injection / extraction member 40. By including the claw portion 40n in the injection / extraction member 40, the fluid can be stably supplied into the bag 20.

[0050] The two injection / extraction members 40 shown in FIGS. 1 and 2 include a protruding portion 45 that protrudes in the first direction DX toward the second inner surface 202. The protruding portion 45 is located within the bag 20. The illustrated injection / extraction member 40 includes a plurality of protruding portions 45 spaced apart in the circumferential direction about an axis extending in the first direction DX. It is possible to pass between adjacent protruding portions 45.

[0051] In the heat exchanger 10 shown in FIGS. 1 and 2, the second sheet 22 is restricted from moving in the first direction DX toward the first sheet 21 by contacting the protruding portion 45 of the injection / extraction 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 protruding portion 45 that protrudes toward the second inner surface 202. According to the injection / extraction member 40 including the protruding portion 45, the heat exchanger 10 can expand the flow path PT in the bag 20 in the first direction DX at the portion of the bag 20 where the injection / extraction member 40 is attached.

[0052] The heat exchanger 10 shown in FIGS. 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 is in contact with the first surface 211 of the first sheet 21 at the contact surface 50a. The contact surface 50a extends in the second direction DY and the third direction DZ. The illustrated first member 50 is in contact with the heat seal layer 35 of the first sheet 21 from the contact surface 50a.

[0053] The first member 50 shown in FIGS. 2 to 4 may be joined to the heat seal layer 35 by being pressed against the heat seal layer 35 in a high-temperature state. The illustrated first member 50 is joined 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 in 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 in contact with the first member 50 than at the portion other than the portion in contact with the first member 50.

[0054] The first member 50 may contain a resin such as polypropylene, high-density polyethylene, low-density polyethylene, linear low-density polyethylene, etc. The first member 50 may be manufactured by extrusion molding. That is, the first member 50 may be manufactured by solidifying the resin extruded from the 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.

[0055] The first member 50 shown in FIGS. 3 and 4 includes a base portion 51 and a linear convex portion 52 protruding from the base portion 51 toward the second inner surface 202. The illustrated base portion 51 and the linear convex portion 52 are connected to each other without a seam. In the illustrated first member 50, the contact surface 50a is located on the base portion 51. That is, the first member 50 is in contact with the first inner surface 201 at the base portion 51.

[0056] The linear convex portion 52 shown in FIGS. 3 and 4 has a longitudinal direction. The longitudinal direction of the linear convex portion 52 may be referred to as the second longitudinal direction DL2. The second longitudinal direction DL2 is the direction in which the linear convex portion 52 extends. In the illustrated heat exchanger 10, in a state where 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. In a state where 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 convex portion 52 protrudes from the base portion 51 to the second side in the first direction DX.

[0057] The linear convex portion 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 portion 51 and the second portion 522 in the first direction DX. The width of the illustrated second portion 522, that is, the length in the third direction DZ, increases as it approaches the first portion 521. In the linear convex portion 52 shown in FIG. 3, the maximum width WD2 of the second portion 522 is larger than the maximum width WD1 of the first portion 521. The linear convex portion 52 has an arrowhead shape when observed from the second longitudinal direction DL2, that is, in the state shown in FIG. 3. The first portion 521 may be referred to as a shaft portion. The second portion 522 may be referred to as a widened portion.

[0058] The heat exchanger 10 shown in FIGS. 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 is in contact with the first surface 221 of the second sheet 22 at the contact surface 60a. The contact surface 60a extends in the second direction DY and the third direction DZ. The illustrated second member 60 is in contact with the heat seal layer 35 of the second sheet 22 from the contact surface 60a.

[0059] The second member 60 shown in FIGS. 2, 3, and 5 may be joined to the heat seal layer 35 by being pressed against the heat seal layer 35 in a high-temperature state. The illustrated second member 60 is joined to the heat seal layer 35 with a certain degree of joining force. The joining 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 in the heat seal layer 35 as shown in FIG. 3. The thickness of the heat seal layer 35 shown in FIG. 3 is smaller in the portion welded to the second member 60 than in the portion other than the portion welded to the second member 60.

[0060] The second member 60 may contain resins such as polypropylene, high-density polyethylene, low-density polyethylene, and 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.

[0061] The second member 60 shown in FIG. 5 includes a base portion 61 and a linear recess 62 protruding from the base portion 61 toward the first inner surface 201. The base portion 61 and the linear recess 62 are connected to each other without a seam. In the illustrated second member 60, the contact surface 60a is located on the base portion 61. That is, the second member 60 is in contact with the second inner surface 202 at the base portion 61. In a state where the second member 60 is fixed to the second inner surface 202, the linear recess 62 linearly extends in a direction parallel to the second longitudinal direction DL2. The linear recess 62 protrudes from the base portion 61 to the first side in the first direction DX.

[0062] The linear recess 62 shown in FIGS. 2, 3, and 5 includes a bottom portion 621 and a wall portion 622 protruding from the bottom portion 621 toward the first inner surface 201. In the illustrated linear recess 62, the bottom portion 621 and the wall portion 622 are connected to each other without a seam. In the illustrated linear recess 62, an accommodation space 60s for at least partially accommodating the linear protrusion 52 is formed by the bottom portion 621 and the wall portion 622.

[0063] The linear recess 62 shown in FIGS. 2, 3, and 5 includes, as a wall portion 622, a first wall portion 622a and a second wall portion 622b that protrude from both ends of the bottom portion 621 in the third direction DZ. As shown in FIG. 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 FIG. 3, the first wall portion 622a and the second wall portion 622b may include claw portions 60n that protrude toward each other at ends opposite to the ends connected to the bottom portion 621.

[0064] As shown in FIG. 2, the linear recess 62 shown in FIGS. 3 and 5 can at least partially accommodate the linear protrusion 52. The illustrated accommodation space 60s opens toward the linear protrusion 52. In FIG. 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. The accommodation space 60s is formed by the bottom portion 621 and the wall portion 622 in the illustrated linear recess 62.

[0065] The minimum opening width WD3 of the accommodation space 60s shown in FIG. 3 is larger than the maximum width WD1 of the first portion 521. Also, the minimum opening width WD3 of the illustrated accommodation space 60s is smaller than the maximum width WD2 of the second portion 522. Note that the minimum opening width is the minimum value of the opening width of the accommodation space 60s. The opening width of the accommodation space 60s in the illustrated linear recess 62 is the distance in the third direction DZ between the first wall portion 622a and the second wall portion 622b. In the illustrated linear recess 62, the opening of the accommodation space 60s is formed by the portions of the first wall portion 622a and the second wall portion 622b that protrude toward each other.

[0066] Since the minimum opening width WD3 of the accommodation space 60s is smaller than the maximum width WD2 of the second portion 522, the second portion 522 shown in FIG. 6 is restricted from moving outside the accommodation space 60s. When the second portion 522 is accommodated in the accommodation space 62s, the movement of the linear protrusion 52 in the first direction DX with respect 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 accommodation space 60s.

[0067] 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 accommodating the second portion 522 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 within the accommodation space 60s, the first wall portion 622a and the second wall portion 622b may return from the deformed state to the state shown in FIG. 3.

[0068] The linear protrusion 52 is movable in the second longitudinal direction DL2 with respect to the linear recess 62 while being held in the linear recess 62. The linear protrusion 52 may move in the second longitudinal direction DL2 with respect to the linear recess 62 while contacting the linear recess 62. By the linear protrusion 52 moving in the second longitudinal direction DL2 with respect to the linear recess 62, the first member 50 to which the linear protrusion 52 is fixed is movable in the second longitudinal direction DL2 with respect to the second member 60 to which the linear recess 62 is fixed. In the illustrated heat exchanger 10, the first member 50 is movable in the first longitudinal direction DL1 with respect to the second member 60.

[0069] In the heat exchanger 10 shown in FIGS. 1 and 2, when the first member 50 moves with respect to the second member 60 in the second longitudinal direction DL2, the first sheet 21 forming the first inner surface 201 is movable with respect to the second sheet 22 forming the second inner surface 202. The first sheet 21 is movable in the second longitudinal direction DL2 with respect to the second sheet 22 at the portion where the first member 50 is fixed, that is, at 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 with respect to the second sheet 22.

[0070] When the linear convex portion 52 is held in the linear concave portion 62, the first member 50 and the second member 60 form the wall portion 70 in the bag 20 as shown in FIGS. 1 and 2. The wall portion 70 shown in FIG. 1 is located in the accommodating 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 at the central portion in the width direction (the third direction DZ in FIG. 1) of the bag 20. The illustrated wall portion 70 includes a portion located on the center line WL in the width direction of the bag 20. The first member 50 forms the wall portion 70 even when it moves in the second longitudinal direction DL2 with respect to the second member 60 from the state shown in FIG. 1 as long as the linear convex portion 52 is held in the linear concave portion 62.

[0071] The wall portion 70 shown in FIG. 1 has a first end portion 71 and a second end portion 72 in the second longitudinal direction DL2. In the illustrated wall portion 70, the first end portion 71 is the end portion on the second side of the second longitudinal direction DL2. The second end portion 72 is the end portion on the first side of the second longitudinal direction DL2. The first end portion 71 and the second end portion 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 FIGS. 8 and 9. The first end portion 71 includes a first connection portion 711 connected to the first inner surface 201 and a second connection portion 712 connected to the second inner surface 202 as shown in FIG. 8. The second end portion 72 includes a third connection portion 721 connected to the first inner surface 201 and a fourth connection portion 722 connected to the second inner surface 202 as shown in FIG. 9.

[0072] As shown in FIG. 1, the wall portion 70 divides the flow path PT in the bag 20. In the illustrated heat exchanger 10, a gap through which fluid can pass is formed between the end of the wall portion 70 on the first side 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 end on the second side in the second direction DY.

[0073] 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 expanded in the first direction DX around the wall portion 70.

[0074] The flow path PT shown in FIG. 1 includes a portion extending along the wall portion 70 in the second longitudinal direction DL2. The illustrated flow path PT includes a first flow path PT1 extending from the injection member 41 to the first side in the second longitudinal direction DL2 and a second flow path PT2 extending from the injection member 41 to the second side in the second longitudinal direction DL2 toward the discharge member 42. In FIG. 1, the first flow path PT1 and the second flow path PT2 are shown as arrows extending in opposite directions to each other. Further, the illustrated flow path PT 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 end of the flow path PT on the first side in the second direction DY. The connection flow path PT3 is formed between the end of the wall portion 70 on the first side in the second direction DY and the joint portion 20p.

[0075] In the heat exchanger 10 shown in FIG. 1, fluid flows into the bag 20 from the injection member 41. The fluid flows through the flow path PT formed in the bag 20 in the order of the first flow path PT1, the connection flow path PT3, and the second flow path PT2, and is discharged from the discharge member 42.

[0076] In the heat exchanger 10 shown in FIGS. 1 and 2, the fluid passes between the protruding portions 45 adjacent to each other in the circumferential direction of the injection member 41 and flows into the first flow path PT1. In the illustrated discharge member 42, the fluid that has passed through the second flow path PT2 passes between the protruding portions 45 adjacent to each other in the circumferential direction of the discharge member 42 and flows out of the bag 20.

[0077] Note that, as shown in FIG. 6, the first member 50 may be movable in the first direction DX with respect to the second member 60 in a state where the linear convex portion 52 is held by the linear concave portion 62. In the bag 20 shown in FIG. 6, compared with the state shown in FIG. 2, the first sheet 21 and the second sheet 22 are pushed in a direction away from each other in the first direction DX. By pushing the first sheet 21 and the second sheet 22 away from each other, the linear convex portion 52 and the linear concave portion 62 are pulled in a direction away from each other in the first direction DX. The linear convex portion 52 and the linear concave portion 62 may be pulled as shown in FIG. 6 by an increase in the pressure of the fluid flowing in the bag 20. The second portion 522 of the linear convex portion 52 is also accommodated in the accommodation space 60s by the claw portions 60n formed on the first wall portion 622a and the second wall portion 622b in the state shown in FIG. 6. The linear convex portion 52 is held by the linear concave portion 62 even in the state shown in FIG. 6.

[0078] By the linear convex portion 52 being held by the linear concave portion 62, the first member 50 and the second member 60 form a wall portion 70 in the bag 20 even in the state shown in FIG. 6. In the heat exchanger 10 shown in FIG. 6, compared with the state shown in FIG. 2, the flow path PT in the bag 20 is expanded in the first direction DX. By expanding the flow path PT, the flow rate of the fluid flowing in the bag 20 can be increased, and the temperature control function of the heat exchanger 10 can be improved.

[0079] Further, as shown in FIG. 3, the first member 50 may be separated from the second member 60 in the first direction DX. In FIG. 3, the first member 50 is separated from the second member 60 in the first direction DX by the linear convex portion 52 being separated from the linear concave portion 62. The second portion 522 of the illustrated linear convex portion 52 can be separated from the accommodation space 60s of the linear concave portion 62 by the claw portions 60n formed on the first wall portion 622a and the second wall portion 622b moving away from each other in the third direction DZ.

[0080] The illustrated claw portion 60n is separated from each other by the first wall portion 622a and the second wall portion 622b being pulled by the second portion 522 of the linear convex portion 52. The illustrated first wall portion 622a and second wall portion 622b are bent away from each other in the third direction DZ with the connection portion to the bottom portion 621 as the axis by being pushed from the second portion 522 of the linear convex portion 52 toward the first inner surface 201 at the claw portion 60n.

[0081] In the state shown in FIG. 3, the first member 50 is not connected to the second member 60. Compared with the bag 20 shown in FIG. 6, the first inner surface 201 and the second inner surface 202 of the bag 20 shown in FIG. 3 are further pulled in a direction away from each other in the first direction DX. The bag 20 may be pulled as shown in FIG. 3 when the pressure of the fluid flowing in the bag 20 further increases from the state shown in FIG. 6.

[0082] The illustrated linear convex portion 52 detaches from the linear concave portion 62 when pulled by a certain force on the first side in the first direction DX with respect to the linear concave portion 62. The illustrated linear convex portion 52 detaches from the linear concave portion 62 when the force pulling the linear convex portion 52 in the first direction DX with respect to the linear concave portion 62 exceeds the holding force by which the linear concave portion 62 holds the linear convex portion 52.

[0083] The heat exchanger 10 may include a spacer 80 located within the bag 20 as shown in FIGS. 1 and 2. The spacer 80 is located in the accommodating 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 joined to one of the first inner surface 201 and the second inner surface 202. The spacer 80 joined 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 located within the bag 20. Two spacers 80 extend in the second direction DY. One spacer 80 extends in the third direction DZ.

[0084] 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 the 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.

[0085] 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 without a seam. 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 high-temperature state. The second sheet 22 may be welded to the spacer 80 in the heat seal layer 35 as shown in FIG. 3. 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 separated from each other in the third direction DZ.

[0086] 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.

[0087] Next, mainly with reference to FIGS. 7 to 9, as the operation of the heat exchanger 10, the heat exchanger 10 of FIG. 1 disposed in the electric appliance 1 will be described. The illustrated heat exchanger 10, together with the electric appliance 1, constitutes an electric appliance with a heat exchanger.

[0088] The heat exchanger 10 shown in FIGS. 7 to 9 is arranged in a meandering state between a plurality of heat exchange targets 2. The meandering heat exchanger 10 is bent at a plurality of locations around an axis parallel to the third direction DZ.

[0089] FIG. 7 shows four heat exchange targets 2. A heat exchanger 10 is arranged between adjacent heat exchange targets 2. The illustrated heat exchange targets 2 extend in a direction parallel to the third direction DZ. The heat exchange targets 2 have a longitudinal direction in a direction parallel to the third direction DZ. Each heat exchange target 2 has the same shape as each other. The heat exchange target 2 included in the electrical appliance 1 may be a battery or a cooling fin.

[0090] The heat exchanger 10 shown in FIGS. 7 to 9 is provided with a first bent portion 91 bent in a first direction around an axis parallel to the third direction DZ and a second bent portion 92 bent in a second direction opposite to the first direction. In FIG. 8, the first bent portion 91 is shown enlarged. In FIG. 9, the second bent portion 92 is shown enlarged. 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.

[0091] In the heat exchanger 10 shown in FIG. 8, there is a difference in the length of the first bent portion 91 between the first inner surface 201 and the second inner surface 202. The first inner surface 201 shown in FIG. 8 is radially separated from the axis AS1 more than the second inner surface 202 in the first bent portion 91. As a result, in the first bent portion 91, the circumferential length of the first inner surface 201 is larger than the circumferential length of the second inner surface 202. Note that the radial direction in FIG. 8 is orthogonal to the direction in which the axis AS1 extends (the third direction DZ) and passes 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 toward the first end portion of the wall portion 70 with respect to the second member 60.

[0092] In the heat exchanger 10 shown in Fig. 9, there is a difference between the first inner surface 201 and the second inner surface 202 in terms of the length of the second bent portion 92. The second inner surface 202 shown in Fig. 9 is radially separated from the axis AS2 more than the first inner surface 201 in the second bent portion 92. As a result, in the second bent portion 92, contrary to the first bent portion 91, the perimeter of the second inner surface 202 is larger than the perimeter of the first inner surface 201. Note that the radial direction in Fig. 9 is orthogonal to the direction in which the axis AS2 extends (the third direction DZ) and passes 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 toward the second end portion 72 of the wall portion 70 with respect to the second member 60.

[0093] The heat exchanger 10 shown in Fig. 7 is provided with a plurality of first bent portions 91 and a plurality of second bent portions 92. The number of the first bent portions 91 is the same as the number of the second bent portions 92. In the illustrated heat exchanger 10, the total perimeter difference 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 total perimeter difference 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 perimeter difference between the first inner surface 201 and the second inner surface 202 is the same among the plurality of first bent portions 91. Also, the perimeter difference between the first inner surface 201 and the second inner surface 202 is the same among the plurality of second bent portions 92.

[0094] In the heat exchanger 10 shown in Fig. 7, by being arranged in a meandering state between the heat exchange objects 2, a moving portion 93 is formed where the first member 50 moves with respect to the second member 60. In the moving portion 93 shown in Figs. 7 to 9, the linear convex portion 52 is held in the linear concave portion 62. Therefore, in the illustrated heat exchanger 10, also in the moving portion 93, the wall portion 70 is formed by the first member 50 and the second member 60.

[0095] In Fig. 8, a plurality of line segments extending between the first inner surface 201 and the second inner surface 202 are shown by two-dot chain lines. Each line segment indicates a portion where the distance in the second longitudinal direction DL2 from the first end portion 71 of the wall portion 70 is equal. Each line segment connects a portion separated by a certain length in the second longitudinal direction DL2 from the first connection portion 711 of the first inner surface 201 and a portion separated by the same length as the certain length in the second longitudinal direction DL2 from the second connection portion 712 of the second inner surface 202. In Fig. 8, ten line segments L1 to L10 arranged at intervals in the second longitudinal direction DL2 are shown by two-dot chain lines.

[0096] Among the ten line segments L1 to L10 shown in Fig. 8, five line segments L6 to L10 are located in the moving portion 93. Among 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, in the first moving portion 91, the first member 50 moves in the second longitudinal direction DL2 toward the first end portion 71 with respect to the second member 60. Due to the movement of the first member 50 in the first moving portion 91, the illustrated five line segments L6 to L10 are inclined with respect to the thickness direction of the bag 20 as compared with the other five line segments L1 to L5. Further, among the illustrated five line segments L6 to L10, the inclination of the line segments L7 to L10 with respect to the thickness direction is larger as compared with the bag 20 of the line segment L6 located in the second bending portion 92.

[0097] In Fig. 9, a plurality of line segments extending between the first inner surface 201 and the second inner surface 202 are shown by two-dot chain lines. Each line segment indicates a portion where the distance in the second longitudinal direction DL2 from the second end portion 72 of the wall portion 70 is equal. Each line segment connects a portion separated by a certain length in the second longitudinal direction DL2 from the third connection portion 721 of the first inner surface 201 and a portion separated by the same length as the certain length in the second longitudinal direction DL2 from the fourth connection portion 722 of the second inner surface 202. In Fig. 9, ten line segments L11 to L20 arranged at intervals in the second longitudinal direction DL2 are shown by two-dot chain lines.

[0098] Of the ten line segments L11 to L20 shown in FIG. 9, five line segments L16 to L20 are located in the moving part 93. Of the ten line segments L11 to L20 shown, the other five line segments L11 to L15 are not located in the moving part 93. In the illustrated heat exchanger 10, in the second part 92, the first member 50 moves in the second longitudinal direction DL2 toward the second end 72 with respect to the second member 60. Due to the movement of the first member 50 in the second part 92, in the illustrated five line segments L11 to L15, the inclination with respect to the thickness direction of the bag 20 is reduced compared to the other five line segments L16 to L20. Further, among the illustrated five line segments L16 to L20, the inclination of the line segment L16 located in the second bending part 92 with respect to the thickness direction of the bag 20 is reduced compared to the other line segments L17 to L20.

[0099] By the way, in a conventional heat exchanger including a bag for containing a fluid, in a wall portion that divides a fluid flow path, a first inner surface and a second inner surface that face each other in the thickness direction of the bag are joined to each other. In the bag of the conventional heat exchanger, a joint portion is formed in the wall portion where a sheet forming the first inner surface and a sheet forming the second inner surface are joined to each other. In the conventional heat exchanger, in the wall portion, the movement of the sheet forming the first inner surface and the sheet forming the second inner surface relative to each other is restricted.

[0100] From the viewpoint of improving the temperature control function of the heat exchanger, an improvement in the area of the portion in contact with the heat exchange target is required. The heat exchanger is arranged in a state bent along the shape of the heat exchange target. The heat exchanger is provided with a bending portion that is bent about an axis extending in a direction non-parallel to the thickness direction of the bag.

[0101] In the bending portion of the heat exchanger, a circumferential length difference occurs between the sheet forming the first inner surface and the sheet forming the second inner surface. In the conventional heat exchanger, even when a circumferential length difference occurs between the sheet forming the first inner surface and the sheet forming the second inner surface, their relative movement is restricted in the wall portion. In the conventional heat exchanger, the sheet located on the inner peripheral side in the bending portion is excessive and wrinkles are generated. The conventional heat exchanger including the bending portion can be arranged in a state where wrinkles are generated in the bag.

[0102] Wrinkles are likely to occur in the accommodating portion that accommodates the fluid. In the accommodating portion, the movement of the sheet constituting the first inner surface and the sheet constituting the second inner surface relative to each other is not restricted, and wrinkles are likely to occur. When wrinkles occur in the accommodating portion, the first inner surface and the second inner surface can approach each other in the accommodating portion. Due to the approach of the first inner surface and the second inner surface, the flow path in the bag can be reduced. When wrinkles occur in the accommodating portion, the first inner surface and the second inner surface can contact each other in the accommodating portion. Due to the contact of the first inner surface and the second inner surface, the flow path in the bag can be blocked.

[0103] In a conventional heat exchanger arranged in a state where wrinkles are formed in the bag, the flow rate of the fluid in the bag can be greatly reduced due to the reduction or blockage of the flow path. Therefore, in a conventional heat exchanger arranged in a state including a bent portion, the temperature control function can be degraded.

[0104] The heat exchanger 10 shown in FIGS. 1 to 9 includes a first member 50 and a second member 60 disposed in the bag 20. The first member 50 is fixed to the first inner surface 201. The second member 60 is fixed to the second inner surface 202. The first member 50 includes a linear convex portion 52 protruding toward the second inner surface 202. The second member 60 includes a linear concave portion 62 capable of holding the linear convex portion 52. The first member 50 and the second member 60 form a wall portion 70 when the linear convex portion 52 is held by the linear concave portion 62. The wall portion 70 divides the flow path PT in the bag 20. The first member 50 is movable relative to the second member 60 in the second longitudinal direction DL2 in a state where the linear convex portion 52 is held by the linear concave portion 62.

[0105] When the heat exchanger 10 shown in FIGS. 1 to 9 is bent and arranged, the first member 50 and the second member 60 are movable relative to each other while forming the wall portion 70 by the linear convex portion 52 being held by the linear concave portion 62. Among the first member 50 and the second member 60, the member located on the outer peripheral side moves relative to the member located on the inner peripheral side. In the first bending portion 91 shown in FIG. 8, the first member 50 moves in the second longitudinal direction DL2 toward the first end portion 71 with respect to the second member 60. By the first member 50 moving relative to the second member 60, in FIG. 8, it is possible to suppress the occurrence of wrinkles in the second sheet 22 located on the inner peripheral side. On the other hand, in the second bending portion 92 shown in FIG. 9, the second member 60 moves in the second longitudinal direction DL2 toward the second end portion 72 with respect to the first member 50. By the second member 60 moving relative to the first member 50, in FIG. 9, it is possible to suppress the occurrence of wrinkles in the first sheet 21 located on the inner peripheral side.

[0106] By suppressing the occurrence of wrinkles in the first sheet 21 and the occurrence of wrinkles in the second sheet 22, in the heat exchanger 10 shown in FIGS. 1 to 9, it is possible to suppress the reduction and blockage of the flow path PT described above. In the illustrated heat exchanger 10, a fluid can flow stably through the flow path PT in the bag 20. Therefore, even when the illustrated heat exchanger 10 is arranged in the electrical appliance 1 with the bending portion provided, it is possible to suppress a decrease in the temperature control function.

[0107] In particular, in the heat exchanger 10 shown in FIG. 1, the bag 20 has a width direction in a direction orthogonal to the second longitudinal direction DL2 which is the longitudinal direction of the linear convex portion 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 separated from the joint portion 20p located at both ends in the width direction of the bag 20. The first sheet 21 and the second sheet 22 are restricted from moving relative to each other at the joint portion 20p. By separating the first member 50 and the second member 60 from the joint portion 20p in the width direction of the bag 20, it is possible to suppress the restriction of the relative movement of the first sheet 21 and the second sheet 22. Therefore, in the illustrated heat exchanger 10, the relative movement of the first member 50 and the second member 60 is promoted, and the generation of wrinkles can be effectively suppressed.

[0108] In the heat exchanger 10 shown in FIGS. 1 to 9, the holding force by which the linear convex portion 52 holds the linear concave portion 62 is smaller than the bonding force between the first member 50 and the heat seal layer 35 of the first sheet 21. Further, the holding force by which the linear convex portion 52 holds the linear concave portion 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 in a direction away from each other in the first direction DX, the linear concave portion 62 is detached from the linear convex portion 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.

[0109] Due to various factors such as an increase in the pressure of the fluid flowing inside the bag 20, the bag 20 can be pulled as described above. The bag 20 can be damaged due to the detachment of the first member 50 from the first sheet 21 or the detachment of the second member 60 from the second sheet 22. In the illustrated bag 20, in particular, due to the damage of the barrier layer 34 included in the first sheet 21 and the second sheet 22, problems such as the leakage of the fluid outside the bag 20 can occur. According to the illustrated heat exchanger 10, the detachment of the linear convex portion 52 from the linear concave portion 62 suppresses the damage of the first sheet 21 and the second sheet 22 including the barrier layer 34, and can suppress the fluid from leaking outside the bag 20.

[0110] The magnitude relationship among the holding force by which the linear concave portion 62 holds the linear convex portion 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.

[0111] Prepare a sample. Prepare two sheets including the heat seal layer 35. Each sheet has a dimension of 50 mm or more in the longitudinal direction. Each sheet has a dimension of 50 mm in the width direction. Of the two sheets, one sheet is the sheet forming the first inner surface 201. Of the two sheets, the other sheet is the sheet forming the second inner surface 202.

[0112] Fix the first member 50 to one sheet. The first member 50 is fixed across the entire width of one sheet. One sheet is welded from the heat seal layer 35 to the first member 50. In the first member 50 fixed to one sheet, the linear convex portion 52 is at least partially located on the center line in the longitudinal direction of one sheet. In one sheet, the longitudinal direction of the linear convex portion 52 extends parallel to the width direction of one sheet.

[0113] Fix the second member 60 to the other sheet. The second member 60 is fixed across the entire width of the other sheet. The other sheet is welded from the heat-sealing layer 35 to the second member 60. 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.

[0114] Hold the linear protrusion 52 of the first member 50 fixed to one sheet by the linear recess 62 of the second member 60 fixed to the other sheet. In this way, a sample is prepared. 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.

[0115] Perform a 180-degree peel test on the prepared sample by the following method. The 180-degree peel test includes a first test and a second test. The order of the first test and the second test does not matter.

[0116] In the first test, one end in the longitudinal direction of one sheet is clamped by one chuck of a tensile testing machine (Autograph AGS-X series, manufactured by Shimadzu Corporation, compliant with JIS B 7721:2018). In the first test, in the other sheet, the longitudinal end located on the same side as the one end is clamped by the other chuck of the tensile testing machine. The sample in this state is pulled at a tensile speed of 200 mm / min under the condition of 25 degrees Celsius. The above first test is performed on five different samples.

[0117] In the second test, the other end in the longitudinal direction of one sheet is clamped by one chuck of the tensile testing machine. In the other sheet, the longitudinal end located on the same side as the one end is clamped by the other chuck of the tensile testing machine. The sample in this state is pulled at a tensile speed of 200 mm / min under the condition of 25 degrees Celsius. The above second test is performed on five different samples.

[0118] When the holding force with which the linear recess 62 holds the linear projection 52 is smaller than the bonding force between the first member 50 and the heat-sealing layer 35 of the first sheet 11 and the holding force with which the linear recess 62 holds the linear projection 52 is smaller than the bonding force between the second member 60 and the heat-sealing layer 35 of the second sheet 22, the following state occurs. That is, in the five samples in which the first test was conducted and the five samples in which the second test was conducted, the linear projection 52 detaches from the linear recess 62 over the entire width of the sample. However, the first member 50 does not detach from one of the sheets in the five samples in which the first test was conducted and the five samples in which the second test was conducted. Also, the second member 60 does not detach from the other sheet in the five samples in which the test was conducted and the five samples in which the second test was conducted.

[0119] In one embodiment described above, the heat exchanger 10 includes the bag 20, the first member 50, the second member 60, and the injection / extraction 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 injection / extraction member 40 forms an injection / extraction port for fluid into / from the bag 20. The first member 50 includes a linear projection 52 that protrudes toward the second inner surface 202. The second member 60 includes a linear recess 62 that can hold the linear projection 52. The first member 50 and the second member 60 form a wall portion 70 that divides the flow path PT within the bag 20 when the linear projection 52 is held by the linear recess 62. The first member 50 is movable relative to the second member 60 in the longitudinal direction of the linear projection 52 in a state where the linear projection 52 is held by the linear recess 62.

[0120] According to the present embodiment, in the heat exchanger 10 in a state where a bent portion is provided, the wall portion 70 is formed by the first member 50 and the second member 60 that move relative to each other. The generation of wrinkles in the sheet forming the first inner surface 201 and the sheet forming the second inner surface 202 is suppressed by the first member 50 and the second member 60 that move relative to each other. The heat exchanger 10 according to the present embodiment can partition the flow path PT by the wall portion 70 and suppress the occurrence of reduction and blockage of the flow path PT. Therefore, the heat exchanger 10 according to the present embodiment can improve the temperature management function.

[0121] Although one embodiment has been described with reference to specific examples, the above specific examples do not limit one embodiment. The above-described one embodiment can be implemented with various other specific examples, and various omissions, replacements, changes, additions, etc. can be made without departing from the gist thereof.

[0122] The above-described bag 20 was composed of the first sheet 21 and the second sheet 22. The first sheet 21 and the second sheet 22 included the first resin layer 31 and the second resin layer 32. The first sheet 21 and the second sheet 22 included two resin layers. The sheet constituting the bag 20 may include three or more resin layers. The sheet constituting the bag 20 may include a third resin layer. In the 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. Further, the sheet constituting the bag 20 may include one resin layer.

[0123] As shown in FIG. 10, the bag 20 may be formed by 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 a single sheet 23 form the first inner surface 201 and the second inner surface 202.

[0124] In FIGS. 10 to 12, which are referred to for explaining an example of deformation, the same reference numerals as those used for the corresponding parts in the above-described specific examples are used for the parts that can be configured in the same manner as the specific examples described in FIGS. 1 to 9. In FIGS. 10 to 12, the description of the parts overlapping with the above-described specific examples is omitted.

[0125] Note that the bag 20 is not limited to the above-described four-side seal type and three-side seal type, and may be various pouches such as a pillow type and a gusset type.

[0126] As shown in FIG. 10, the heat exchanger 10 may include a plurality of spacers 80 arranged at intervals in the second longitudinal direction DL2. The heat exchanger 10 shown in FIG. 10 can be easily bent about an axis extending in the third direction DZ from a portion where the spacer 80 is not formed in the second direction DY. According to the heat exchanger 10 shown in FIG. 10, the heat exchanger 10 can be easily bent according to the shape of the object to be heat-exchanged, and the flow path PT can be stably secured by the spacer 80.

[0127] In the heat exchanger 10 shown in FIG. 10, the inlet / outlet member 40 is fixed to the first inner surface 201. The inlet / outlet member 40 may not include the protruding portion 45 as shown in FIG. 10. In the heat exchanger 10 shown in FIG. 10, even if the inlet / outlet member 40 does not include the protruding portion 45, the flow path PT in the bag 20 can be expanded in the first direction DX at the portion where the inlet / outlet member 40 of the bag 20 is attached.

[0128] The above-described spacer 80 included a base portion 81 and two protruding portions 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 protruding portion 82 protruding from the base portion 81. The illustrated spacer 80 is fixed to the second inner surface 202 from the base portion 81.

[0129] The above-mentioned injection / extraction member 40 included a claw portion 40n capable of holding a mounting port of a hose (not shown). Instead of the claw portion 40n, the injection / extraction member 40 may include a threaded portion 40s capable of holding a mounting port of a hose as shown in FIG. 11. In the heat exchanger 10 shown in FIG. 11, by rotating the hose about an axis extending in the first direction DX, the mounting port of the hose is fastened to the threaded portion 40s. By fastening the hose to the injection / extraction member 40, it may be possible to prevent the hose from coming off the injection / extraction member 40.

[0130] In the above-mentioned heat exchanger 10, the injection / extraction member 40 was attached to the sheet forming the first inner surface 201. The injection / extraction member 40 protruded from the bag 20 in the first direction DX. Not limited thereto, the injection / extraction member 40 may be attached to the bag 20 while being sandwiched between the sheet forming the first inner surface 201 and the sheet forming the second inner surface 202 as shown in FIG. 12. The injection / extraction member 40 may protrude from the bag 20 in a direction non-parallel to the first direction DX. As an example, the injection / extraction member 40 may protrude in a direction parallel to the second longitudinal direction DL2 as shown in FIG. 12.

[0131] A plurality of injection / extraction 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. Two injection / extraction members 40 may be integrally formed. The two injection / extraction members 40 shown in FIG. 12 are connected to each other by a connection portion 46. The illustrated connection portion 46 overlaps with the joint portion 20p of the bag 20 in the first direction DX. By connecting a plurality of injection / extraction members 40 to each other, it is possible to easily manufacture the bag 20 including the injection / extraction member 40 that opens to the inside.

Explanation of Reference Numerals

[0132] 1: Electrical appliance, 2: Object to be heat-exchanged, 10: Heat exchanger, 20: Bag, 201: First inner surface, 202: Second inner surface, 35: Heat-sealing layer, 40: Injection / extraction member, 41: Injection member, 42: Extraction member, 50: First member, 52: Linear convex portion, 60: Second member, 62: Linear concave portion, 70: Wall portion, 80: Spacer, PT: Flow path, WL: Center line

Claims

1. 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 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 within the bag when the linear convex portion is held in the linear concave portion, and the first member is movable relative to the second member in the longitudinal direction of the linear convex portion when the linear convex portion is held in the linear concave portion, a heat exchanger.

2. The heat exchanger according to claim 1, wherein the first member is movable in the first direction relative 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 seal layer forming the first inner surface, the first member is joined to the heat seal layer, and the holding force by which the linear concave portion holds the linear convex portion is smaller than the bonding force between the first member and the heat seal layer, the heat exchanger according to claim 1.

5. The bag includes a heat seal layer forming the second inner surface, the second member is joined to the heat seal layer, and the holding force by which the linear concave portion holds the linear convex portion is smaller than the bonding force between the first member and the heat seal 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 within the bag and protruding toward the other of the first inner surface and the second inner surface.

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

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 within 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, The heat exchanger according to claim 1, wherein the first member and the second member are located on the center line in the width direction of the bag.

10. comprising two of the injection / extraction members, wherein one of the two injection / extraction members is an injection member that forms an inlet for the fluid into the bag, and the other of the two injection / extraction members is an extraction member that forms an outlet for the fluid from the bag, wherein the flow path includes a portion extending in the longitudinal direction from the injection member and a portion extending in the longitudinal direction toward the extraction member, The heat exchanger according to claim 9, wherein the wall portion is 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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