WO2022210879A1 - 冷媒流路ユニット、及び、冷凍装置 - Google Patents
冷媒流路ユニット、及び、冷凍装置 Download PDFInfo
- Publication number
- WO2022210879A1 WO2022210879A1 PCT/JP2022/016001 JP2022016001W WO2022210879A1 WO 2022210879 A1 WO2022210879 A1 WO 2022210879A1 JP 2022016001 W JP2022016001 W JP 2022016001W WO 2022210879 A1 WO2022210879 A1 WO 2022210879A1
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- WIPO (PCT)
- Prior art keywords
- plate
- refrigerant
- opening
- pipe
- refrigerant pipe
- Prior art date
Links
- 239000003507 refrigerant Substances 0.000 title claims abstract description 152
- 238000005219 brazing Methods 0.000 claims abstract description 92
- 239000000463 material Substances 0.000 claims abstract description 63
- 230000002093 peripheral effect Effects 0.000 claims abstract description 33
- 238000002844 melting Methods 0.000 claims description 21
- 230000008018 melting Effects 0.000 claims description 21
- 239000002826 coolant Substances 0.000 claims description 10
- 238000005057 refrigeration Methods 0.000 claims description 6
- 239000000945 filler Substances 0.000 description 18
- 229910052751 metal Inorganic materials 0.000 description 18
- 239000002184 metal Substances 0.000 description 18
- 239000000758 substrate Substances 0.000 description 6
- 229910000906 Bronze Inorganic materials 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000010974 bronze Substances 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 4
- RIRXDDRGHVUXNJ-UHFFFAOYSA-N [Cu].[P] Chemical compound [Cu].[P] RIRXDDRGHVUXNJ-UHFFFAOYSA-N 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- 229910000881 Cu alloy Inorganic materials 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 229910000679 solder Inorganic materials 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/40—Fluid line arrangements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K1/00—Soldering, e.g. brazing, or unsoldering
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/0008—Soldering, e.g. brazing, or unsoldering specially adapted for particular articles or work
- B23K1/0012—Brazing heat exchangers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/19—Soldering, e.g. brazing, or unsoldering taking account of the properties of the materials to be soldered
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/20—Preliminary treatment of work or areas to be soldered, e.g. in respect of a galvanic coating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
- F24F1/26—Refrigerant piping
Definitions
- the present disclosure relates to a refrigerant channel unit and a refrigeration system.
- Patent Literature 1 discloses a substrate (coolant channel unit) in which an upper substrate and a lower substrate are laminated to each other and coolant channels are formed therein. A hole is formed in the upper substrate of this substrate, and an auxiliary pipe leading to a compressor, a heat exchanger, etc. is connected to this hole.
- An object of the present disclosure is to firmly join a plate and a refrigerant pipe that constitute a refrigerant channel unit.
- the refrigerant channel unit of the present disclosure is a unit body having a plurality of plates stacked on each other and having a coolant channel formed therein; a refrigerant pipe; a first brazing material that joins the unit main body and the refrigerant pipe,
- the unit body has a first plate formed with a first opening, and a second plate formed with a second opening communicating with the first opening and laminated on the first plate,
- the refrigerant pipe is inserted into the first opening and the second opening,
- the first brazing material joins the inner peripheral surface of the first opening, the inner peripheral surface of the second opening, and the outer peripheral surface of the refrigerant pipe.
- the refrigerant pipes are joined across the first and second plates, so the joint length between the unit main body and the refrigerant pipes can be increased and the joint strength can be increased.
- the refrigerant pipe is connected to another refrigerant pipe connected to a compressor of an air conditioner.
- the compressor is a vibration source that generates vibrations, it is more preferable to increase the joint strength between the refrigerant pipes through which vibrations from the compressor are transmitted and the unit main body.
- the coolant channel unit further includes a second brazing material that joins the first plate and the second plate.
- the melting point of the first brazing material and the melting point of the second brazing material are the same. According to this configuration, when joining the first plate and the second plate and joining the first plate and the second plate to the refrigerant pipe are performed simultaneously by brazing in the furnace, the temperature in the furnace can be easily controlled. be able to.
- the first plate is thinner than the second plate. With such a configuration, it is possible to reduce the weight of the refrigerant channel unit.
- the first plate has a cylindrical protrusion that protrudes in the stacking direction of the first plate and the second plate and forms the first opening. According to this configuration, by inserting the refrigerant pipe into the first opening formed in the cylinder of the projecting portion and joining the inner peripheral surface of the projecting portion and the outer peripheral surface of the refrigerant pipe with the first brazing material, both can be increased.
- the refrigerant pipe includes a first refrigerant pipe and a second refrigerant pipe having a smaller diameter than the first refrigerant pipe,
- the joint length of the first refrigerant pipe with the first plate and the second plate in the pipe axis direction is longer than that of the second refrigerant pipe. According to this configuration, the bonding strength between the first refrigerant pipe having a large diameter and the unit main body can be increased compared to the second refrigerant pipe having a small diameter.
- a refrigeration system of the present disclosure has the refrigerant channel unit according to any one of (1) to (7) above.
- FIG. 1 is a perspective view of a refrigerant channel unit according to a first embodiment of the present disclosure, viewed from one side;
- FIG. FIG. 4 is a perspective view of the refrigerant channel unit according to the first embodiment of the present disclosure, viewed from the other side;
- FIG. 4 is a cross-sectional view of part of the refrigerant channel unit;
- Fig. 4 is a cross-sectional view showing an enlarged joint portion between the unit main body and the refrigerant pipe;
- FIG. 8 is an enlarged cross-sectional view showing a joint portion between a unit main body and a refrigerant pipe of a refrigerant channel unit according to a second embodiment;
- FIG. 11 is an enlarged cross-sectional view showing a joint portion between a unit main body and a refrigerant pipe of a refrigerant channel unit according to a third embodiment;
- FIG. 11 is a cross-sectional view of part of a coolant channel unit according to a fourth embodiment;
- FIG. 1 is a perspective view of a refrigerant channel unit according to a first embodiment of the present disclosure, viewed from one side.
- FIG. 2 is a perspective view of the refrigerant channel unit according to the first embodiment of the present disclosure, viewed from the other side.
- FIG. 3 is a cross-sectional view of a part of the refrigerant channel unit.
- the refrigerant flow path unit 10 of the present embodiment is applied, for example, to a refrigeration system equipped with a refrigerant circuit that performs a vapor compression refrigeration cycle operation.
- Refrigerating devices include air conditioners, refrigerators, freezers, water heaters, and the like.
- Equipment such as a four-way switching valve, an electric valve, a compressor, an accumulator, an oil separator, etc. that constitute a refrigerant circuit are connected to the refrigerant channel unit 10 .
- functional parts such as a four-way switching valve 61 and an electric valve 62 are connected to one surface of the refrigerant channel unit 10, as shown in FIG.
- the refrigerant channel unit 10 in the present embodiment is fixed to the bottom plate or the like of the air conditioner in an upright posture (a posture in which the plate surface is vertically aligned) via a support base 63, for example.
- the refrigerant channel unit 10 has a unit body 11, a first joint pipe 12 that is a refrigerant pipe, and a second joint pipe 13 that is a refrigerant pipe.
- the unit main body 11 has a plurality of plates 21, 22, 23. As shown in FIG. A plurality of plates 21, 22, 23 are stacked and joined together. The plates 21, 22, 23 of this embodiment are made of stainless steel.
- a coolant channel 15 is formed inside the unit main body 11 .
- the direction in which the plurality of plates 21, 22, and 23 are stacked normal direction of each plate
- a direction parallel to the surfaces of the plates 21, 22, and 23 (a direction orthogonal to the first direction) is also referred to as a second direction.
- the plurality of plates 21 , 22 , 23 has a first plate 21 , a second plate 22 laminated on the first plate 21 , and a third plate 23 laminated on the second plate 22 .
- the plates 21, 22, 23 adjacent to each other are joined by brazing.
- the first plates 21 are arranged at both ends of the unit body 11 in the first direction.
- the first plate 21 is formed thinner than the other second and third plates 22,23.
- the first plate 21 is provided with a connection cylinder 21b that is a protruding portion that protrudes outward from the unit main body 11 in the first direction.
- the connection cylinder 21b is formed in a cylindrical shape.
- the tube axis of the connection tube 21b is parallel to the first direction.
- the inside of the connecting tube 21b forms a first opening 21a.
- the first opening 21 a is a circular hole penetrating the first plate 21 .
- a total of three first openings 21a are shown in the two first plates 21 shown in FIG.
- the connecting tube 21b and the first opening 21a are formed by burring the first plate 21. As shown in FIG.
- the second plate 22 is positioned second from both ends of the unit main body 11 in the first direction.
- the second plate 22 is formed thicker than the first plate 21 .
- the thickness of the second plate 22 can be set to 4 mm, which is four times the thickness.
- a second opening 22a is formed in the second plate 22 .
- the second opening 22 a is a circular hole penetrating the second plate 22 .
- a total of three second openings 22a are shown in the two second plates 22 shown in FIG.
- the second opening 22 a communicates with the first opening 21 a of the first plate 21 .
- the first opening 21a and the second opening 22a have the same inner diameter.
- the first plate 21 on one side (upper side) shown in FIG. 3 has two first openings 21a (connection cylinders 21b) on the left and right sides, which have different diameters.
- the second plate 22 on one side (upper side) shown in FIG. 3 has two second openings 22a on the left and right, which have different diameters.
- the third plate 23 is arranged between two second plates 22 spaced apart in the first direction. In this embodiment, three third plates 23 are stacked between two second plates 22 .
- the third plate 23 is formed to have the same thickness as the second plate 22 . Therefore, the second plate 22 and the third plate 23 can be formed by processing the same material.
- the third plate 23 is formed with a third opening 23a that constitutes the coolant channel 15. As shown in FIG.
- the third openings 23a are holes passing through each third plate 23 or slits extending in the second direction. In the example shown in FIG. 3, the third opening 23a is formed in a range extending over the two second openings 22a of the second plate 22 on one side.
- the third opening 23 a communicates with the second opening 22 a of the second plate 22 .
- the first to third plates 21, 22, 23 may be made of materials other than stainless steel, such as aluminum, aluminum alloy, iron, and the like.
- FIG. 4 is a cross-sectional view showing an enlarged joint portion between the unit main body and the refrigerant pipe.
- the first joint pipe 12 is attached to a first plate 21 and a second plate 22 arranged on one side (upper side in FIG. 3) in the first direction.
- the first joint pipe 12 has a large-diameter portion 12a on one end side in the pipe axial direction, a small-diameter portion 12b on the other end side, and a stepped portion 12c in the middle.
- the large diameter portion 12a and the small diameter portion 12b are cylindrical.
- the diameter of the large diameter portion 12a is larger than the diameter of the small diameter portion 12b.
- the stepped portion 12c is formed in a conical shape so that the diameter gradually decreases from the large diameter portion 12a toward the small diameter portion 12b.
- the small diameter portion 12b of the first joint pipe 12 is inserted into the first opening 21a and the second opening 22a.
- the length of the small-diameter portion 12b in the axial direction is substantially the same as the sum of the length of the connecting tube 21b in the first direction and the length of the second opening 22a (thickness of the second plate 22).
- the outer peripheral surface of the small-diameter portion 12b of the first joint pipe 12, the inner peripheral surface of the first opening 21a, and the inner peripheral surface of the second opening 22a are joined by brazing with a brazing material (first brazing material) B3.
- the inner peripheral surface of the first opening 21a means the surface of the first plate 21 forming the first opening 21a.
- the inner peripheral surface of the second opening 22a means the surface forming the second opening 22a of the second plate 22 .
- the first joint pipe 12 of this embodiment is made of a material containing copper as a main component, such as copper or copper alloy.
- the first joint pipe 12 may be made of other materials such as stainless steel, aluminum, aluminum alloy, and iron.
- This refrigerant pipe 101 is connected to the large diameter portion 12 a of the first joint pipe 12 .
- This refrigerant pipe 101 is, for example, a refrigerant pipe extending from a four-way switching valve 61 or an electric valve 62 as shown in FIG.
- this type of refrigerant pipe 101 is made of a material containing copper as a main component, such as copper or a copper alloy.
- One end of the refrigerant pipe 101 is inserted into the large diameter portion 12a of the first joint pipe 12, and the outer peripheral surface of the refrigerant pipe 101 and the inner peripheral surface of the large diameter portion 12a are joined by brazing with a brazing material B2. ing.
- Two first joint pipes 12 are connected to the left and right of the first and second plates 21 and 22 on one side (upper side) shown in FIG. is different.
- the large-diameter first joint pipe 12 (shown with reference numeral 51 in FIG. 3) is joined to the inner peripheral surfaces of the large-diameter first opening 21a1 and the second opening 22a1.
- the small-diameter first joint pipe 12 (shown with reference numeral 52 in FIG. 3) is joined to the inner peripheral surfaces of the small-diameter first opening 21a2 and the second opening 22a2.
- the connecting tube 21b1 forming the large-diameter first opening 21a1 is longer in the first direction than the connecting tube 21b2 forming the small-diameter first opening 21a2. Therefore, the joint length in the first direction between the large-diameter first joint pipe 51 and the first and second plates 21 and 22 is equal to that of the small-diameter first joint pipe 52 and the first and second plates 21 and 22. is greater than the junction length in the first direction.
- the first joint pipe 12 may be a pipe with a constant diameter that does not include the large-diameter portion 12a, the small-diameter portion 12b, and the stepped portion 12c.
- the second joint pipe (refrigerant pipe) 13 is attached to the first plate 21 and the second plate 22 arranged on the other side in the first direction (lower side in FIG. 3).
- Another refrigerant pipe 102 connected to a container such as a compressor or an accumulator is connected to the second joint pipe 13 .
- One end 13a of the second joint pipe 13 is inserted into the first opening 21a and the second opening 22a.
- the outer peripheral surface of the second joint pipe 13, the inner peripheral surface of the first opening 21a, and the inner peripheral surface of the second opening 22a are joined by brazing using a brazing material (first brazing material) B3.
- the second joint pipe 13 includes one end 13a connected to the first and second plates 21 and 22, a curved portion 13b curved 90° from the one end 13a, and extending along the second direction from the curved portion 13b. and a straight portion 13c.
- the other end 13d of the refrigerant pipe 102 is arranged upward or sideways with the refrigerant channel unit 10 standing upright. Therefore, another refrigerant pipe 102 extending from a container such as a compressor can be easily connected to the other end portion 13d of the second joint pipe 13 by burner brazing or the like.
- One end of the refrigerant pipe 102 is inserted into the other end 13d of the second joint pipe 13, and the outer peripheral surface of the refrigerant pipe 102 and the inner peripheral surface of the other end 13d are joined by brazing with a brazing material B2. ing.
- bronze brazing material is used as the brazing material (second brazing material) B1 that joins the plurality of plates 21, 22, 23 together.
- Bronze brazing is also used for the brazing material (first brazing material) B3 that joins the first plate 21 and the second plate 22 to the first joint pipe 12 .
- Bronze brazing is also used for the brazing filler metal (first brazing filler metal) B3 that joins the first and second plates 21 and 22 and the second joint pipe 13 .
- the brazing filler metal B2 that joins the first joint pipe 12 and the other refrigerant pipe 101 is phosphor copper brazing.
- Phosphor copper brazing is also used for the brazing filler metal B2 that joins the second joint pipe 13 and the other refrigerant pipe 102 .
- BCu-3 for example, is used as the bronze solder.
- BCuP-2 for example, is used as the phosphor copper solder.
- the brazing filler metals B1 and B3 have higher melting points than the brazing filler metal B2. Since the brazing filler metal B1 and the brazing filler metal B3 are the same brazing filler metal, they have the same melting point. However, the brazing material B1 and the brazing material B3 may be different materials having the same melting point. The brazing material B1 and the brazing material B3 may be different materials with different melting points.
- the joining of the plurality of plates 21, 22, 23 and the joining of the first and second plates 21, 22 to the first and second joint pipes 12, 13 are performed by furnace brazing.
- a sheet-like brazing material B1 is set between the plates 21, 22, and 23.
- a ring-shaped brazing material B3 is set between the connecting tube 21b of one of the first plates 21 and the first joint pipe 12.
- a ring-shaped brazing filler metal B3 is set between the connecting tube 21b of the other first plate 21 and the second joint pipe 13.
- the coolant channel unit 10 is manufactured.
- the first and second joint pipes 12, 13 of the refrigerant channel unit 10 manufactured as described above and the other refrigerant pipes 101, 102 are joined by burner brazing using the brazing material B2.
- the heat of the burner is transferred not only to the first and second joint pipes 12 and 13 but also to the unit main body by radiation and heat conduction. 11 is also transmitted.
- the unit body 11 is formed in a block shape by stacking a plurality of plates 21, 22, and 23, and has a large heat capacity, so it easily absorbs the heat of the burner. Therefore, the heat is easily transferred to the brazing material B1 that joins the plates 21, 22, and 23 together.
- the brazing material B1 has a higher melting point than the brazing material B2. Therefore, by heating the brazing filler metal B2 (and the surrounding first and second joint pipes 12 and 13 and the refrigerant pipes 101 and 102) at a temperature lower than the melting point of the brazing filler metal B1 and higher than the melting point of the brazing filler metal B2, , melting of the brazing material B1 due to the heat generated when the first and second joint pipes 12 and 13 and the refrigerant pipes 101 and 102 are joined can be suppressed.
- the melting point of the brazing filler metal B3 that joins the first and second plates 21 and 22 to the first and second joint pipes 12 and 13 is also higher than the melting point of the brazing filler metal B2. Therefore, it is possible to suppress melting of the brazing material B3 due to the heat generated when the first and second joint pipes 12 and 13 and the refrigerant pipes 101 and 102 are joined.
- the distance L between the connecting tube 21b of the first plate 21 and the refrigerant pipe 101 attached to the large-diameter portion 12a of the first joint pipe 12 is, for example, 100 mm or less.
- the second joint pipe 13 is longer than the first joint pipe 12 in the axial direction.
- the distance between the connection tube 21b of the first plate 21 and the refrigerant pipe 102 connected to the second joint pipe 13 exceeds 100 mm. Therefore, the heat of the burner for brazing the second joint pipe 13 and the refrigerant pipe 102 is less likely to be transmitted to the unit main body 11 than the first joint pipe 12 due to heat conduction.
- the second joint pipe 13 is bent by 90° in the middle, and the other end 13 d to which the refrigerant pipe 102 is connected is close to the unit main body 11 . Therefore, the heat of the burner is easily transmitted to the unit main body 11 by radiation. Therefore, like the first joint pipe 12, it is preferable to connect the refrigerant pipe 102 to the second joint pipe 13 using the brazing filler metal B2 having a lower melting point than the brazing filler metal B1.
- FIG. 5 is an enlarged cross-sectional view showing a joint portion between a unit main body and a refrigerant pipe of a refrigerant channel unit according to the second embodiment.
- the first plates 21 arranged at both end portions in the first direction are the connecting cylinders 21b as in the first embodiment. does not have
- the first joint pipe 12 is inserted into the first opening 21a formed in the first plate 21 and the second opening 22a formed in the second plate 22, and the inner peripheral surface of the first opening 21a and the second opening It is joined to the inner peripheral surface of 22a with brazing material B3.
- the first plate 21 of the present embodiment has the same thickness as the second plate 22 and the third plate 23 in order to secure the joint length with the first joint pipe 12 .
- the unit main body 11 is arranged between two first plates 21 on both sides in the first direction, two second plates 22 stacked on each first plate 21 , and the two second plates 22 . It consists of a total of five or more plates 21, 22, 23, including one or more third plates 23.
- the second joint pipe 13 (see FIG. 3), like the first joint pipe 12, has a first opening 21a formed in the first plate 21 having the same thickness as the second plate 22. , and the second opening 22a formed in the second plate 22, and joined with the brazing material B3.
- Other configurations are the same as those of the first embodiment.
- the relationship between the melting points of the brazing materials B1, B2, and B3 is the same as in the first embodiment.
- FIG. 6 is an enlarged cross-sectional view showing a joint portion between a unit main body and a refrigerant pipe of a refrigerant channel unit according to the third embodiment.
- the refrigerant channel unit 10 of this embodiment has the same configuration of the plates 21, 22, and 23 of the unit body 11 as the unit body 11 shown in FIGS. .
- the refrigerant channel unit 10 of this embodiment also does not include the second joint pipe 13 .
- the refrigerant pipe 103 is directly inserted into the first opening 21a of the first plate 21 and the second opening 22a of the second plate 22, and the inner peripheral surface of the first opening 21a and the inner peripheral surface of the second opening 22a,
- the outer peripheral surface of the refrigerant pipe 103 is brazed with a brazing material (first brazing material) B4.
- This brazing material B4 has a melting point lower than that of the brazing material B1.
- the refrigerant pipe 103 is joined to the unit main body 11 by burner brazing or the like.
- the connection tube 21b may be omitted.
- FIG. 7 is a cross-sectional view of part of a refrigerant channel unit according to a fourth embodiment.
- the refrigerant channel unit 10 of the present embodiment is provided with first joint pipes 12 on both sides of the unit main body 11 in the first direction, and other refrigerant pipes 101 are connected to the first joint pipes 12 .
- Other configurations are substantially the same as those of the first embodiment.
- the refrigerant channel unit 10 of each of the above-described embodiments includes a unit body 11 having a plurality of plates 21, 22, and 23 stacked on each other and having a refrigerant channel 15 formed therein, and a joint which is a refrigerant pipe. It comprises pipes 12, 13 or refrigerant pipe 103, and first brazing materials B3, B4 for joining unit main body 11 and refrigerant pipes 12, 13, 103.
- the unit body 11 has a first plate 21 formed with a first opening 21a, and a second plate 22 formed with a second opening 22a communicating with the first opening 21a and laminated on the first plate 21. .
- the refrigerant pipes 12, 13, 103 are inserted into the first opening 21a and the second opening 22a.
- the first brazing materials B3 and B4 join the inner peripheral surfaces of the first and second openings 21a and 22a to the outer peripheral surfaces of the refrigerant pipes 12, 13, and 103, respectively.
- the joint length between the unit main body 11 and the refrigerant pipes 12, 13, 103 is can be increased to increase the bonding strength. Therefore, for example, when a component that generates vibration such as a compressor is connected to the refrigerant pipes 12, 13, 103, the influence of the vibration on the joint portion between the refrigerant pipes 12, 13, 103 and the unit main body 11 is suppressed. can do.
- the second joint pipe 13, which is a refrigerant pipe is connected to another refrigerant pipe 102 connected to the compressor of the air conditioner.
- the refrigerant channel unit 10 further includes the second brazing material B1 that joins the first plate 21 and the second plate 22 together.
- the melting point of the first brazing material B3 and the melting point of the second brazing material B1 are the same. Therefore, when joining the first plate 21 and the second plate 22 and joining the first plate 21 and the second plate 22 to the refrigerant pipes 12 and 13 at the same time by furnace brazing, temperature control in the furnace is required. It can be done easily.
- the first plate 21 is formed thinner than the second plate 22 . Therefore, the weight of the refrigerant channel unit 10 can be reduced.
- the first plate 21 protrudes in the stacking direction of the first plate 21 and the second plate 22 to form the first opening 21a. have. Therefore, the refrigerant pipes 12, 13, 103 are inserted into the first opening 21a and the second opening 22a formed in the cylinder of the connecting cylinder 21b, and the inner peripheral surface of the first opening 21a and the inner periphery of the second opening 22a are By joining the surfaces and the outer peripheral surfaces of the refrigerant pipes 12, 13, 103 with the first brazing filler metals B3, B4, the joint length between the two can be increased.
- the process of forming the connection tube 21b on the first plate 21 can be easily performed.
- the refrigerant pipe exemplified by the first joint pipe 12 includes the first refrigerant pipe 51 and the second refrigerant pipe 52 having a smaller diameter than the first refrigerant pipe 51,
- the joint length of the first refrigerant pipe 51 with the first plate 21 and the second plate 22 in the pipe axis direction is longer than that of the second refrigerant pipe 52 . Therefore, the first refrigerant pipe 51 having a large diameter can increase the joint strength with the unit body 11 more than the second refrigerant pipe 52 having a small diameter.
- the present disclosure is not limited to the above examples, but is indicated by the scope of the claims, and is intended to include all modifications within the scope and meaning equivalent to the scope of the claims.
- the number of plates constituting the unit main body 11 is not limited to the above embodiment, and the coolant channel unit of the present disclosure only needs to include the first plate and the second plate.
- the unit body 11 of the refrigerant channel unit 10 is not limited to a plate shape, and can take any shape such as a block shape.
- Refrigerant channel unit 11 Unit body 12: First joint pipe (refrigerant pipe) 13: Second joint pipe (refrigerant pipe) 21: first plate 21a: first opening 21b: connection tube (projection) 22: Second plate 22a: Second opening 103: Refrigerant pipe B1: Brazing material (second brazing material) B3: Brazing material (first brazing material) B4: Brazing material (first brazing material)
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- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
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Abstract
Description
互いに積層される複数のプレートを有し内部に冷媒流路が形成されたユニット本体と、
冷媒管と、
前記ユニット本体と前記冷媒管とを接合させる第1ろう材と、を備え、
前記ユニット本体が、第1開口が形成された第1プレートと、前記第1開口に連通する第2開口が形成され、前記第1プレートに積層される第2プレートと、を有し、
前記冷媒管が、前記第1開口及び前記第2開口に挿入され、
前記第1ろう材が、前記第1開口の内周面及び前記第2開口の内周面と前記冷媒管の外周面とを接合させる。
圧縮機は、振動を発生する振動源となるので、圧縮機からの振動が伝わる冷媒管とユニット本体との接合強度を高めることがより好適である。
この構成によれば、第1プレートと第2プレートとの接合と、第1プレート及び第2プレートと冷媒管との接合を炉中ろう付けで同時に行う場合、炉内の温度管理を容易に行うことができる。
このような構成によって、冷媒流路ユニットの軽量化を図ることができる。
この構成によれば、突出部の筒内に形成される第1開口に冷媒管を挿入し、突出部の内周面と冷媒管の外周面とを第1ろう材で接合させることで、両者の接合長さを大きくすることができる。
前記第2の冷媒管よりも前記第1の冷媒管の方が、管軸方向における前記第1プレート及び前記第2プレートとの接合長さが大きい。
この構成によれば、径の小さい第2の冷媒管よりも、径の大きい第1冷媒管とユニット本体との接合強度を高めることができる。
[第1の実施形態]
図1は、本開示の第1実施形態に係る冷媒流路ユニットを一方側からみた斜視図である。図2は、本開示の第1実施形態に係る冷媒流路ユニットを他方側からみた斜視図である。図3は、冷媒流路ユニットの一部の断面図である。
第1継手管12は、第1方向の一方側(図3における上側)に配置された第1プレート21及び第2プレート22に取り付けられる。第1継手管12は、管軸心方向の一端側に大径部12a、他端側に小径部12b、中間に段差部12cを有している。大径部12a及び小径部12bは円筒形状である。大径部12aの径は小径部12bの径よりも大きい。段差部12cは、大径部12aから小径部12bに向けて徐々に径が小さくなるように円錐状に形成されている。
ろう材B1とろう材B3とは、同一のろう材であるため、融点は同じである。ただし、ろう材B1とろう材B3とは、異なる材料で融点が同一であってもよい。ろう材B1とろう材B3とは、異なる材料で融点が異なっていてもよい。
図5は、第2実施形態に係る冷媒流路ユニットのユニット本体と冷媒管との接合部分を拡大して示す断面図である。
本実施形態の冷媒流路ユニット10は、ユニット本体11を構成する複数のプレートのうち、第1方向の両端部に配置される第1プレート21が、第1の実施形態のような接続筒21bを備えていない。第1継手管12は、第1プレート21に形成された第1開口21aと、第2プレート22に形成された第2開口22aとに挿入され、第1開口21aの内周面と第2開口22aの内周面とにろう材B3で接合されている。
その他の構成は、第1の実施形態と同様である。本実施形態においても、ろう材B1,B2,B3の融点の関係は、第1の実施形態と同様である。
図6は、第3実施形態に係る冷媒流路ユニットのユニット本体と冷媒管との接合部分を拡大して示す断面図である。
本実施形態の冷媒流路ユニット10は、ユニット本体11のプレート21,22,23の構成が、図3及び図4に示すユニット本体11と同様であるが、第1継手管12を備えていない。図示はしていないが、本実施形態の冷媒流路ユニット10は、第2継手管13も備えていない。
図7は、第4実施形態に係る冷媒流路ユニットの一部の断面図である。
本実施形態の冷媒流路ユニット10は、第1方向におけるユニット本体11の両側に第1継手管12が設けられ、当該第1継手管12に他の冷媒管101が接続されている。それ以外の構成は、第1の実施形態と略同様である。
(1)上記各実施形態の冷媒流路ユニット10は、互いに積層される複数のプレート21,22,23を有し内部に冷媒流路15が形成されたユニット本体11と、冷媒管である継手管12,13又は冷媒管103と、ユニット本体11と冷媒管12,13,103とを接合させる第1ろう材B3、B4と、を備える。ユニット本体11は、第1開口21aが形成された第1プレート21と、第1開口21aに連通する第2開口22aが形成され、第1プレート21に積層される第2プレート22と、を有する。冷媒管12,13,103は、第1開口21a及び前記第2開口22aに挿入される。第1ろう材B3,B4は、第1開口21aの内周面及び第2開口22aの内周面と冷媒管12,13,103の外周面とを接合させる。
例えば、ユニット本体11を構成するプレートの枚数は、上記実施形態に限定されるものではなく、本開示の冷媒流路ユニットは、第1プレートと第2プレートとを含んでいればよい。また、冷媒流路ユニット10のユニット本体11は、板状に限定されず、ブロック状等のあらゆる形態をとることができる。
11 :ユニット本体
12 :第1継手管(冷媒管)
13 :第2継手管(冷媒管)
21 :第1プレート
21a :第1開口
21b :接続筒(突出部)
22 :第2プレート
22a :第2開口
103 :冷媒管
B1 :ろう材(第2ろう材)
B3 :ろう材(第1ろう材)
B4 :ろう材(第1ろう材)
Claims (8)
- 互いに積層される複数のプレート(21,22,23)を有し内部に冷媒流路(15)が形成されたユニット本体(11)と、
冷媒管(12,13,103)と、
前記ユニット本体(11)と前記冷媒管(12,13,103)とを接合させる第1ろう材(B3,B4)と、を備え、
前記ユニット本体(11)が、第1開口(21a)が形成された第1プレート(21)と、前記第1開口(21a)に連通する第2開口(22a)が形成され、前記第1プレート(21)に積層される第2プレート(22)と、を有し、
前記冷媒管(12,13,103)が、前記第1開口(21a)及び前記第2開口(22a)に挿入され、
前記第1ろう材(B3,B4)が、前記第1開口(21a)の内周面及び前記第2開口(22a)の内周面と前記冷媒管(12,13,103)の外周面とを接合させる、冷媒流路ユニット。 - 前記冷媒管(13)は、空気調和機の圧縮機に繋がる他の冷媒管(102)に接続される、請求項1に記載の冷媒流路ユニット。
- 前記第1プレート(21)と前記第2プレート(22)とを接合する第2ろう材(B1)をさらに備える請求項1又は2に記載の冷媒流路ユニット。
- 前記第1ろう材(B3)の融点と前記第2ろう材(B1)の融点とが同一である、請求項3に記載の冷媒流路ユニット。
- 前記第1プレート(21)は、前記第2プレート(22)よりも薄く形成される、請求項1~4のいずれか1項に記載の冷媒流路ユニット。
- 前記第1プレート(21)が、前記第1プレート(21)及び第2プレート(22)の積層方向に突出し前記第1開口(21a)を形成する筒状の突出部(21b)を有している、請求項1~5のいずれか1項に記載の冷媒流路ユニット。
- 前記冷媒管(12)が、第1の冷媒管(51)と、前記第1の冷媒管(51)よりも径が小さい第2の冷媒管(52)とを含み、
前記第2の冷媒管(52)よりも前記第1の冷媒管(51)の方が、管軸方向における前記第1プレート(21)及び前記第2プレート(22)との接合長さが大きい、請求項1~6のいずれか1項に記載の冷媒流路ユニット。 - 請求項1~7のいずれか1項に記載の冷媒流路ユニットを有する、冷凍装置。
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