In a fluid transport tube (1) having a plurality of layers (2, 3) layered therein, an outer layer (3) of the plurality of layers (2, 3) is made of a thermoplastic elastomer foam body. An inner layer (2) of the plurality of layers (2, 3) is made of a thermoplastic elastomer or a thermoplastic resin. The outer layer (3) and the inner layer (2) are tightly attached to each other. The expansion ratio of the thermoplastic elastomer foam body is 2-5.5 fold. This allows an improvement in heat insulation and production stability of the fluid transport tube (1).
B32B 5/18 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by features of a layer containing foamed or specifically porous material
An internal heat exchanger (18) has an outer pipe (181) and an inner pipe (182). The internal heat exchanger (18) is connected to a non-expansion-valve-side connector (31) so that a relationship of fluid communication is provided. The internal heat exchanger (18) is connected to an expansion-valve-side connector (186) so that a relationship of fluid communication is provided. The outer pipe (181) and the inner pipe (182) are pressure-bonded to each other with a same-core structure interposed therebetween. The pressure-bonding contributes to suppression of relative deviation between the outer pipe (181) and the inner pipe (182). At least one of the non-expansion-valve-side connector (31) and the expansion-valve-side connector (186) accommodates movement of the inner pipe (182). A manufacturing method includes a step for restoring the extent to which the distal end of an outer pipe (181) and the distal end of an inner pipe (182) are coaxial with each other.
F28D 7/10 - Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically
F28F 1/32 - Tubular elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely the means having portions engaging further tubular elements
F28F 1/42 - Tubular elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being both outside and inside the tubular element
3.
Internal heat exchanger and refrigeration cycle apparatus having the internal heat exchanger
A double pipe forms an inner flow path, through which a low-pressure side refrigerant flows, inside an inner pipe, and forms an inner-outer flow path, through which a high-pressure side refrigerant flows, between the outer pipe and the inner pipe. It comprises an expansion valve side connector and a counter-expansion valve side connector which are interposed between distal ends of the outer pipe and the inner pipe and members to be connected. An outer diameter of the outer pipe is 30 millimeters or less. A ratio of a difference between an inner diameter of the outer pipe and an outer diameter of the inner pipe with respect to the inner diameter of the outer pipe is 25% or less. A sealing member is provided to prevent a refrigerant leakage. The plurality of members are mechanically fixed.
F16L 39/00 - Joints or fittings for double-walled or multi-channel pipes or pipe assemblies
F28D 7/10 - Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically
F28F 9/22 - Arrangements for directing heat-exchange media into successive compartments, e.g. arrangements of guide plates
F25B 41/33 - Expansion valves with the valve member being actuated by the fluid pressure, e.g. by the pressure of the refrigerant
4.
INTERNAL HEAT EXCHANGER AND REFRIGERATING CYCLE DEVICE EQUIPPED WITH INTERNAL HEAT EXCHANGER
In the present invention, an internal flow path (18 b) through which a refrigerant flows is formed on the inside of the inner pipe (182) of a double-walled pipe, and an interior/exterior flowpath (18a) through which high-pressure-side refrigerant flows is formed between the outer pipe (181) and the inner pipe (182). An expansion valve-side connector (186) and connector (31) on the opposite side from the expansion valve are provided, interposed between the tip of the outer pipe (181) and the inner pipe (182) and the members to be connected (14, 35, 37). The outer diameter of the outer pipe does not exceed 30 mm. The ratio of the difference between the inner diameter of the outer pipe and the outer diameter of the inner pipe with respect to the inner diameter of the outer pipe does not exceed 25%. Seal members (191 and 192) which prevent the leakage of refrigerant are provided. The plurality of members are mechanically fixed in place.
F25B 41/06 - Flow restrictors, e.g. capillary tubes; Disposition thereof
F28D 7/10 - Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically
F28F 9/00 - CasingsHeader boxesAuxiliary supports for elementsAuxiliary members within casings
F28F 9/22 - Arrangements for directing heat-exchange media into successive compartments, e.g. arrangements of guide plates
5.
HEAT TRANSFER MEMBER, HEAT TRANSFER PIPE, HEAT EXCHANGER, METHOD FOR MANUFACTURING HEAT TRANSFER PIPE, AND METHOD FOR MANUFACTURING HEAT EXCHANGER
A heat transfer member is provided with a group of heat transfer promoting portions (2) including a set of upstream side edge portions (20), a set of downstream side edge portions (21), and a recessed portion (22), provided on a fluid contacting surface (11). Adjacent sets of the upstream side edge portions protrude out from the contacting surface, each form an acute angle relative to the main direction of flow of the fluid, and extend in such a way as to approach one another with increasing distance toward the upstream side. Adjacent sets of the downstream side edge portions protrude out on the downstream side, to a greater extent than the upstream side edge portions, each form an acute angle relative to the main direction of flow, and extend in such a way as to approach one another with increasing distance toward the downstream side. The recessed portions are recessed to a greater extent than the upstream side edge portions and the downstream side edge portions, inside the sets of upstream side edge portions and the sets of downstream side edge portions. A plurality of the groups of heat transfer promoting portions are provided consecutively in the downstream direction. The downstream side edge portions of the upstream side heat transfer promoting portions are integral with the upstream side edge portions of the downstream side heat transfer promoting portions.
F28F 13/12 - Arrangements for modifying heat transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media by creating turbulence, e.g. by stirring, by increasing the force of circulation
F28D 7/10 - Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically
F28F 1/12 - Tubular elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
F28F 1/40 - Tubular elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only inside the tubular element
F28F 1/42 - Tubular elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being both outside and inside the tubular element
F28F 3/04 - Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element
F28F 13/08 - Arrangements for modifying heat transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media by varying the cross-section of the flow channels
This method for joining a double pipe is applied to a heat exchanger provided with a double pipe comprising an outer pipe (1) and an inner pipe (2) that are made of an aluminum alloy. The heat exchanger performs heat exchange between a refrigerant flowing between the inner pipe (2) and the outer pipe (1) and a refrigerant flowing inside the inner pipe (2). In the joining method, the outer pipe (1) and the inner pipe (2) in the heat exchanger configured in this manner are joined by brazing. More specifically, protrusions (3) that project radially from the outer periphery of the inner pipe (2) toward the outer pipe (1) are formed on the inner pipe (2), and the outer pipe (1) and the inner pipe (2) are brazed at the protrusions (3).
F28D 7/10 - Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically
B23K 1/00 - Soldering, e.g. brazing, or unsoldering
B23K 1/19 - Soldering, e.g. brazing, or unsoldering taking account of the properties of the materials to be soldered
B23K 31/02 - Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by any single one of main groups relating to soldering or welding
B23K 33/00 - Specially-profiled edge portions of workpieces for making soldering or welding connectionsFilling the seams formed thereby
F28F 21/08 - Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
This method for joining a double pipe is applied to a heat exchanger provided with a double pipe comprising an outer pipe (1) and an inner pipe (2) that are made of an aluminum alloy. The heat exchanger performs heat exchange between a refrigerant flowing between the inner pipe (2) and the outer pipe (1) and a refrigerant flowing inside of the inner pipe (2). In the joining method, the outer pipe (1) and the inner pipe (2) are joined by brazing/heating via a brazing member positioned therebetween. More specifically, the space between the outer pipe (1) and the inner pipe (2) is filled with an inert gas before brazing/heating, whereupon the outer pipe (1) and the inner pipe (2) are joined together by brazing/heating.
F28D 7/10 - Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically
B23K 1/00 - Soldering, e.g. brazing, or unsoldering
B23K 1/19 - Soldering, e.g. brazing, or unsoldering taking account of the properties of the materials to be soldered
B23K 31/02 - Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by any single one of main groups relating to soldering or welding
B23K 33/00 - Specially-profiled edge portions of workpieces for making soldering or welding connectionsFilling the seams formed thereby
F28F 21/08 - Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
A piping structure in which a first pipe member (12) and a second pipe member (14) are connected to each other in an insulated state. A first connecting pipe part (121) constitutes a portion of the first pipe member and includes a tip end (12a) of the first pipe member. A second connecting pipe part (141) constitutes a portion of the second pipe member and includes a tip end (14a) of the second pipe member. The second connecting pipe part is arranged in line with the first connecting pipe part such that the tip end of the second pipe member faces the tip end of the first pipe member in the axial direction with a gap (20) therebetween. A first elastic part is inserted into a tubular first pressing part (181), and the first pressing part keeps the first elastic part pressed against the first connecting pipe part. A second elastic part is inserted into a tubular second pressing part (182), and the second pressing part keeps the second elastic part pressed against the second connecting pipe part. Insulating spacer parts (163, 221) are provided between the tip end of the first pipe member and the tip end of the second pipe member.
F16L 13/14 - Non-disconnectable pipe joints, e.g. soldered, adhesive, or caulked joints made by plastically deforming the material of the pipe, e.g. by flanging, rolling
F16L 25/02 - Construction or details of pipe joints not provided for in, or of interest apart from, groups specially adapted for electrically insulating the two pipe ends of the joint from each other
Provided is a double-pipe heat exchanger comprising an outer pipe (181), an inner pipe (182), and a joint (183). The outer pipe forms the outer pipe of the double pipe. The inner pipe forms the inner pipe of the double pipe. The joint metallurgically joins the inner surface of the outer pipe and the outer surface of the inner pipe. The outer pipe and the inner pipe are made of a metal. An inner flow path (18b) through which an inner fluid flows is formed in the inner pipe. A flow path (18a) between the inside and the outside through which an inside and outside fluid having a temperature difference with respect to the inner fluid flow is formed between the outer pipe and the inner pipe. As a result, it is possible to transfer heat from the outer pipe to the inner pipe through the joint, and to increase the amount of heat exchange.
F28D 7/10 - Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically
F28F 1/06 - Tubular elements of cross-section which is non-circular crimped or corrugated in cross-section
F28F 1/36 - Tubular elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending obliquely the means being helically-wound fins or wire spirals
F28F 1/40 - Tubular elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only inside the tubular element
F28F 13/12 - Arrangements for modifying heat transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media by creating turbulence, e.g. by stirring, by increasing the force of circulation
Piping provided with: a hose (1) made of an elastic material; a metal pipe (2) with an insert section (22) that is inserted inside the hose from an end of the hose; and a sleeve (4) that is disposed to the outside of the insert section and the hose in the radial direction and is for pressing the hose on the insert section. The insert section is provided with an uneven surface (30) having ring-shaped grooves (31) and ring-shaped protrusions (32) on the outer circumferential surface of the insert section. The grooves are provided with an inclined groove surface (305) that narrows toward the tip of the insert section and a groove bottom surface (306) extending from the end of the inclined groove surface that is toward the tip of the insert section to a protrusion and having a constant outer diameter. The sleeve is provided with small diameter sections (421) that are located to the outside of the uneven surface in the radial direction and are for pressing the hose onto the uneven surface.
F16L 33/207 - Undivided rings, sleeves, or like members contracted on the hose or expanded inside the hose by means of toolsArrangements using such members only a sleeve being contracted on the hose
A refrigeration cycle device includes a flow channel coupling member which constitutes at least one of a branching portion and a joining portion of a third refrigerant passage and a branching portion and a joining portion of a bypass passage. One of three refrigerant ports of the flow channel coupling member is directly connected to one of two refrigerant ports of a first switching device or a second switching device, and a sealing mechanism preventing a refrigerant leakage is provided in a connecting portion between the refrigerant port of the flow channel coupling member and the refrigerant port of the first switching device or the second switching device. The flow channel coupling member is fixed to one of the switching devices at a position different from a position of the sealing mechanism.
Provided is a processing unit (10) for processing a rod-shaped member (W). The processing unit (10) has: a first unit (23) comprising an upper first split-type section of a pair of upper and lower split-type sections having a bend groove for bending the rod-shaped member (W), and an upper first clamp section of a pair of upper and lower clamp sections for retaining the rod-shaped member that has been inserted into the bend groove; a second unit (22) comprising a lower second split-type section of the pair of upper and lower split-type sections and a lower second clamp section of the pair of upper and lower clamp sections; a pressure part (30) having a retaining groove for retaining the rod-shaped member in the bend groove from the outer peripheral side of the bend groove; and an opening and closing unit (69) for opening and closing the first unit (23), the second unit (22), and the pressure part (30) in three different directions with respect to a setting center (C), which is the position of a center axis of the rod-shaped member (W) in the state of being fit into the bend groove.
B21D 7/025 - Bending rods, profiles, or tubes over a stationary forming memberBending rods, profiles, or tubes by use of a swinging forming member or abutment by a swinging forming member and pulling or pushing the ends of the work
A refrigeration cycle device comprising flow path connecting members (50, 51, 55, 56) that configure at least one of either: a branched section and a confluence section for a third refrigerant passage (18); or a branched section and a confluence section for a bypass passage (22). One of three refrigerant ports for the flow path connecting members is directly connected to one of two refrigerant ports for a first switching device (17) and a second switching device (23). Sealing mechanisms (50a, 17a, 58) that prevent refrigerant leakage are provided in the connection section between the refrigerant port for the flow path connection members and the refrigerant port for the first switching device or second switching device. The flow path connection members are fixed to one of the switching devices at a site different from the sealing mechanisms. As a result, vehicle mounting space can be reduced, the number of components can be reduced, cooling and heating performance can be increased, the amount of refrigerant or refrigerator oil enclosed can be reduced, and refrigerant leakage can be suppressed.
A part connection device is provided in a refrigerant circulation cycle for circulating a refrigerant, and connects members to be coupled so as to be in communication with each other, said members to be coupled being three constituent parts constituting the refrigerant circulation cycle. The part connection device comprises: a block-shaped joint member which has connecting openings formed so as to be opened on each end face that contacts a member to be coupled, and an internal channel which is in communication with all connecting openings, said block-shaped joint member allowing communication between the members to be coupled via the internal channel; a male joint member that is a cylindrical body supported in a situation of being inserted in the connecting opening, has a seal which is in contact with the inner wall of the connecting opening and prevents refrigerant from leaking from the inner channel to the exterior, said male joint member coupling the block-shaped joint member to each of the members to be coupled; and a fixture for fixing each of the members to be coupled to the block-shaped joint member.
A pipe joint includes a soft pipe, a hard pipe and a sleeve. The hard pipe includes an insert portion inserted into an inside of the soft pipe from an end portion of the soft pipe. The sleeve is arranged radially outside of the insert portion and the soft pipe, and presses the soft pipe toward the insert portion. The insert portion includes a corrugated surface, which is arranged on an outer surface of the insert portion, and a column surface, which is arranged on the outer surface at a tip side of the insert portion. The sleeve includes a first small diameter portion, which is arranged radially outside of the corrugated surface and presses the soft pipe toward the corrugated surface, and a second small diameter portion arranged radially outside of the column surface and presses the soft pipe toward the column surface.
F16L 33/00 - Arrangements for connecting hoses to rigid membersRigid hose-connectors, i.e. single members engaging both hoses
F16L 33/207 - Undivided rings, sleeves, or like members contracted on the hose or expanded inside the hose by means of toolsArrangements using such members only a sleeve being contracted on the hose
patents
