CN105180523B - Refrigerating circulatory device - Google Patents

Refrigerating circulatory device Download PDF

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Publication number
CN105180523B
CN105180523B CN201510558064.8A CN201510558064A CN105180523B CN 105180523 B CN105180523 B CN 105180523B CN 201510558064 A CN201510558064 A CN 201510558064A CN 105180523 B CN105180523 B CN 105180523B
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China
Prior art keywords
refrigerant pipe
copper
heat exchanger
aluminium
inverted
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CN201510558064.8A
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Chinese (zh)
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CN105180523A (en
Inventor
谷口胜志
横山昭
横山昭一
野间富之
山本宪昭
杉尾孝
高桥正敏
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Panasonic Intellectual Property Management Co Ltd
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Panasonic Intellectual Property Management Co Ltd
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/0246—Arrangements for connecting header boxes with flow lines
    • F28F9/0256—Arrangements for coupling connectors with flow lines
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F17/00—Removing ice or water from heat-exchange apparatus
    • F28F17/005—Means for draining condensates from heat exchangers, e.g. from evaporators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
    • F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
    • F28F21/081—Heat exchange elements made from metals or metal alloys
    • F28F21/084—Heat exchange elements made from metals or metal alloys from aluminium or aluminium alloys
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
    • F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
    • F28F21/081—Heat exchange elements made from metals or metal alloys
    • F28F21/085—Heat exchange elements made from metals or metal alloys from copper or copper alloys
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/0068—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for refrigerant cycles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2275/00—Fastening; Joining

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Air Filters, Heat-Exchange Apparatuses, And Housings Of Air-Conditioning Units (AREA)
  • Other Air-Conditioning Systems (AREA)

Abstract

Air conditioner (1) includes outdoor heat converter (2) and indoor heat converter (3), refrigerant is set to be circulated along the pipe arrangement being arranged between heat exchanger (2,3), kind of refrigeration cycle (4) is formed, the air conditioner includes：Form a part for kind of refrigeration cycle (4), the aluminium refrigerant pipe comprising aluminum or aluminum alloy；With other parts for forming kind of refrigeration cycle (4) and the copper refrigerant pipe comprising copper or copper alloy being connected with aluminium refrigerant pipe, (P1, P2) is provided with the inverted U-shaped portion that aluminium refrigerant pipe is made to the shape convex towards upside and above-mentioned copper refrigerant pipe is made at least one in the U-shaped portion of the shape convex towards downside near connecting portion of the aluminium refrigerant pipe with copper refrigerant pipe.

Description

Refrigerating circulatory device
The application be the applying date be on March 4th, 2011, Application No. 201180066624.8, entitled " refrigeration is followed The divisional application of the application of loop device ".
Technical field
The present invention relates to including being inhaled by heat exchange to the first heat exchanger of external heat rejection and by heat exchange from outside The second heat exchanger of heat, and make refrigerant along the pipe arrangement stream being arranged between the first heat exchanger and second heat exchanger Logical refrigerating circulatory device.
Background technology
In the prior art, as refrigerating circulatory device, particularly in air conditioner, use with copper or copper alloy shape Into refrigeration of the duct member (copper refrigerant pipe) as the respective inside for being configured at outdoor heat converter and indoor heat converter Agent pipe, and as connect these heat exchangers between refrigerant pipe be main flow.But according to lightweight and cost degradation will Ask, in recent years it has been proposed that using the scheme (reference of the duct member (aluminium refrigerant pipe) formed by aluminum or aluminum alloy in a part Patent document 1).
But because aluminium is the bigger material of ionization tendency, so by the not same metal with copper etc. contact and Easily produce corrosion (galvanic corrosion).In addition, it is this corrosion in addition to being produced because of the direct contact of aluminium and copper, also by comprising copper from The water droplet of son is contacted and produced with aluminium.Particularly, in air conditioner, the refrigeration of heat exchanger indoors when cooling operates The refrigerant of circulation low temperature in agent pipe, the refrigeration for the low temperature that circulated when warming operation in the refrigerant pipe of outdoor heat converter Agent, it is possible to the vapor dew being contained in extraneous air, water droplet is attached to refrigerant pipe, and aluminium is entered because of the water droplet Row corrosion.Then, in above-mentioned patent document 1, it is proposed that the bonding part of aluminium refrigerant pipe and copper refrigerant pipe is entered The scheme of row cladding.
Prior art literature
Patent document
Patent document 1：Japanese Unexamined Patent Publication 2005-90761 publications
The content of the invention
The invention problem to be solved
But, it is necessary to new cladding parts in the case of above-mentioned patent document 1, it is difficult to the requirement of corresponding cost degradation.Separately Outside, the live flow chart in the refrigerating circulatory device for setting air conditioner etc. is added, also, if without suitably wrapping Cover, the corrosion of aluminium refrigerant pipe cannot be prevented.And then the limitation for the durable years that must take into consideration cladding parts also be present.
Then, in view of the foregoing, can be more reliably prevented from freezing with copper it is an object of the invention to provide one kind The refrigerating circulatory device of the corrosion of the aluminium refrigerant pipe of agent pipe connection.
For solving the method for problem
According to such structure, in the case where aluminium refrigerant pipe sets inverted U-shaped portion, can suppress to be attached to copper system The moisture of refrigerant tube moves to aluminium refrigerant pipe, and the moisture in the surface sweating of aluminium refrigerant pipe is freezed to copper Agent pipe draining.In addition, in the case where copper refrigerant pipe sets U-shaped portion, the water for being attached to copper refrigerant pipe can be captured Point, suppress the moisture and moved to aluminium refrigerant pipe, and moisture can be made to concentrate on the foot of U-shaped portion, make it downwards Drip.
It is configured at alternatively, it is also possible to above-mentioned aluminium refrigerant pipe in above-mentioned first heat exchanger, in above-mentioned aluminium refrigerant The connecting portion of pipe and above-mentioned copper refrigerant pipe is nearby provided with above-mentioned inverted U-shaped portion or above-mentioned U-shaped portion.According to such structure The corrosion of the passageway part for the aluminium refrigerant pipe being disposed in first heat exchanger can be reliably suppressed.And then due to Compressor and outdoor fan are set near heat exchanger, so setting inverted U-shaped portion or U-shaped near heat exchanger as described above Portion, make refrigerant pipe that there is redundancy, thus enable that due to their driving and caused vibration decay, suppression propagates to be formed The pipeline of kind of refrigeration cycle is overall.
Alternatively, it is also possible to above-mentioned aluminium refrigerant pipe in the upper side and lower side of above-mentioned first heat exchanger and above-mentioned copper system Refrigerant tube connects, and near the connecting portion of upside, above-mentioned copper refrigerant pipe is provided with above-mentioned U-shaped portion, the company in downside Near sites are connect, above-mentioned aluminium refrigerant pipe is provided with above-mentioned inverted U-shaped portion.According to such structure, inverted U-shaped portion or U-shaped portion It will not just or downwards be protruded more up from the top and bottom of first heat exchanger, the large-scale of overall dimensions can be suppressed Change.
Alternatively, it is also possible to the connecting portion of the above-mentioned aluminium refrigerant pipe and above-mentioned copper refrigerant pipe of downside, positioned at phase The position offset in the horizontal direction for the plumb line of the above-mentioned U-shaped portion by upside.According to such structure, can prevent From the attachment of moisture that the foot of the U-shaped portion of upside drips in the aluminium refrigerant pipe of downside.
Alternatively, it is also possible to also have expansion valve, it is disposed in above-mentioned kind of refrigeration cycle, make above-mentioned first heat exchanger with The pressure of the refrigerant to be circulated between above-mentioned second heat exchanger declines, and the expansion valve has the copper being connected with aluminium refrigerant pipe Refrigerant pipe processed, above-mentioned aluminium refrigerant pipe is connected between above-mentioned expansion valve and above-mentioned first heat exchanger, in above-mentioned expansion valve The connecting portion of the above-mentioned copper refrigerant pipe having and above-mentioned aluminium refrigerant pipe is nearby provided with above-mentioned inverted U-shaped portion or above-mentioned U-shaped portion.According to such structure, the aluminium refrigerant pipe that is connected with the copper refrigerant pipe of expansion valve can be reliably suppressed Corrosion.
Alternatively, it is also possible to also include：Compressor, it is disposed in above-mentioned kind of refrigeration cycle, and the refrigerant of low-temp low-pressure is entered Row compression, make refrigerant boosting high temperature；And four-way valve, its circulating direction to the refrigerant in above-mentioned kind of refrigeration cycle are carried out Switching, it is above-mentioned that above-mentioned four-way valve uses the port that the refrigerant of the gasification from above-mentioned compressor flows into when cooling operates Copper refrigerant pipe, the copper refrigerant pipe is with connecting the aluminium refrigerant Guan Lian between above-mentioned four-way valve and above-mentioned compressor Connect, be provided near connecting portion of the above-mentioned copper refrigerant pipe that above-mentioned four-way valve has with above-mentioned aluminium refrigerant pipe State inverted U-shaped portion or above-mentioned U-shaped portion.According to such structure, it can be reliably suppressed and be connected with the copper refrigerant pipe of four-way valve Aluminium refrigerant pipe corrosion.
The duct member formed by aluminum or aluminum alloy is utilized to form alternatively, it is also possible to above-mentioned inverted U-shaped portion, the one of the duct member End eutectic bonding has the duct member of the straight tube-like formed by copper or copper alloy.According to such structure, due to that can manufacture now The duct member that inverted u-shaped is pre-machined into and has eutectic bonding part is connected by field or repairing scene etc. with to hand unit, institute Become easy with operation at the scene.
The duct member formed by copper or copper alloy is utilized to form alternatively, it is also possible to above-mentioned U-shaped portion, in one end of the duct member Eutectic bonding has the duct member of the straight tube-like formed by aluminum or aluminum alloy.According to such structure, as described above, due to can be with U-shape will be pre-machined at manufacture scene or repairing scene etc. and there is the duct member of eutectic bonding part with connecting to hand unit Connect, so operation at the scene becomes easy.
The effect of invention
A kind of aluminium refrigerant pipe that can be more reliably prevented from being connected with copper refrigerant pipe is provided according to the present invention The refrigerating circulatory device of corrosion.
Brief description of the drawings
Fig. 1 is a kind of signal of the structure for the air conditioner as refrigerating circulatory device for representing present embodiment Figure.
Fig. 2 is for illustrating to be arranged at the inverted U-shaped portion near outdoor heat converter and the schematic diagram of U-shaped portion.
Fig. 3 is the schematic front figure of the U-tube and inverted-loop tube shown in enlarged representation Fig. 2, and (a) represents U-tube, and (b) is represented Inverted-loop tube.
Fig. 4 is the schematic diagram in the inverted U-shaped portion in the place near the four-way valve being arranged at for explanation shown in Fig. 1.
Fig. 5 is the schematic diagram in the inverted U-shaped portion in the place near the expansion valve being arranged at for explanation shown in Fig. 1.
Embodiment
Hereinafter, referring to the drawings, to a kind of air conditioner as refrigerating circulatory device of embodiments of the present invention Illustrate.Fig. 1 is the schematic diagram of the structure for the air conditioner for representing present embodiment.As shown in Figure 1, air conditioner 1 includes：To the first exchanger 2 (hereinafter referred to as " outdoor heat converter 2 ") of external heat rejection when cooling operates；Absorbed heat from extraneous air Second heat exchanger 3 (hereinafter referred to as " indoor heat converter 3 ")；With the kind of refrigeration cycle formed comprising these heat exchangers 2,3 4.In addition, the fan driven respectively by motor 5,6 is provided near the outdoor heat converter 2 and indoor heat converter 3 7th, 8, by the rotation driving of fan 7,8 and caused airflow passes heat exchanger 2,3.
In addition, in the following description, for convenience, the manifestation mode of " upstream " and " downstream " is used, still, these are Refer to, when making air conditioner 1 carry out cooling operating, in " upstream " and " downstream " in the refrigerant flow direction in path 4. Also, shown in Fig. 1 along the arrow added around path 4 refer to cooling operating when refrigerant from " upstream " flow direction " downstream " Direction.In addition, in advance additionally, the refrigerant when flow direction of refrigerant during warming operation operates with cooling flows to phase Instead, it is shown in dotted line.
As shown in figure 1, there is the refrigerant pipe 4a for the part for forming kind of refrigeration cycle 4 indoors, from it in heat exchanger 3 Downstream, which is extended, refrigerant pipe 4b, refrigerant pipe 4b and indoor set connecting portion 10 (from indoor heat converter 3, The connecting portion in downstream when cooling operates) connection.Being extended from the indoor set connecting portion 10 has other refrigerant pipe 4c, Refrigerant pipe 4c downstream is connected with refrigerant pipe 4d, refrigerant pipe 4d downstream and four-way valve 12 via triple valve 11 First port connects.In four-way valve 12, the second port connected when being operated from cooling with first port, which is extended, refrigerant Pipe 4e, refrigerant pipe 4e downstream are connected with compressor 13.The compressor 13 is when cooling operates to from indoor heat converter 3 The refrigerant of the low-temp low-pressure gone to outdoor heat converter 2 is compressed, make its boost high temperature, in warming operation, to from The refrigerant for the low-temp low-pressure that outdoor heat converter 2 is gone to indoor heat converter 3 is compressed, and makes its high temperature of boosting.In addition, Although not shown, but before compressor 13 reservoir (Accumulator) is generally connected with, carries out the gas-liquid separation of refrigerant, Liquid refrigerant is set not return to compressor 13.
In addition, being extended from compressor 13 has another refrigerant pipe 4f, refrigerant pipe 4f downstream and four-way valve 12 the 3rd port connection.In four-way valve 12, the remaining 4th port extension connected when being operated from cooling with the 3rd port is set Refrigerant pipe 4g is equipped with, refrigerant pipe 4g downstream connects with the upstream end of the refrigerant pipe 4h of installation in outdoor heat converter 2 Connect.The downstream of refrigerant pipe 4h out of this outdoor heat converter 2, which is extended, another refrigerant pipe 4i, refrigerant pipe 4i downstream is connected with expansion valve 14.The expansion valve 14 is when cooling operates to from outdoor heat converter 2 to indoor heat exchange The refrigerant that device 3 is gone is depressured, the refrigerant in warming operation to being gone from indoor heat converter 3 to outdoor heat converter 2 It is depressured.
Being extended from expansion valve 14 has another refrigerant pipe 4j, refrigerant pipe 4j downstream and the one of two-port valve 15 Individual port connection.Being extended from another port of the two-port valve 15 has a refrigerant pipe 4k, refrigerant pipe 4k downstream with Indoor set connecting portion 16 (from indoor heat converter 3, the connecting portion of upstream side when cooling operates) connection.Also, from this Indoor set connecting portion 16, which is extended, another refrigerant pipe 4m, refrigerant pipe 4m downstream and above-mentioned indoor heat exchange The upstream end connection of refrigerant pipe 4a in device 3.
So, kind of refrigeration cycle 4 is formed by refrigerant pipe 4a~4k, 4m, by the kind of refrigeration cycle 4 by indoor heat converter 3rd, four-way valve 12, compressor 13, outdoor heat converter 3, expansion valve 14 etc. connect.In addition, in above-mentioned structure, along system Construct of the flow direction of cryogen from triple valve 11 to two-port valve 15 is (that is, including four-way valve 12, compressor 13, outdoor heat converter 2 With expansion valve 14) form present embodiment air conditioner 1 outdoor unit 1A.In addition, along the flow direction of refrigerant from interior The construct (that is, including indoor heat converter 3) of machine connecting portion 16 to indoor set connecting portion 10 forms the air of present embodiment The indoor set 1B of regulation machine 1.
In addition, above-mentioned each composition can use any known product in itself.In addition, for this air conditioner 1 It is known that cooling, which is operated with action during warming operation, so in this description will be omitted.
But the air conditioner 1 of present embodiment is provided with the suitable position for the refrigerant pipe for forming kind of refrigeration cycle 4 Inverted U-shaped portion and U-shaped portion.Specifically, in Fig. 1, one or more of place P1~P4 shown in the circle in dotted line portions Position is provided with inverted U-shaped portion and U-shaped portion.The refrigerant pipe 4h and its upstream side that wherein place P1 expression outdoor heat converters 2 have Refrigerant pipe 4g connecting portion near.The refrigerant pipe 4h and side downstream that P2 expression outdoor heat converters 2 in place have Refrigerant pipe 4i connecting portion near.Place P3 is represented from the refrigerant pipe 4f that compressor 13 is extended and four-way valve 12 The 3rd port connecting portion near.And place P4 represent from outdoor heat converter 2 be extended refrigerant pipe 4i with Near the connecting portion of expansion valve 14.The inverted U-shaped portion and U-shaped portion that are arranged at this four place P1~P4 are chatted in detail below State.
Fig. 2 is the inverted U-shaped portion and the schematic diagram of U-shaped portion for illustrating to be arranged at place P1, P2.As shown in Fig. 2 outdoor heat Exchanger 2 is in the shape of the approximately parallelepiped body of lengthwise, and from the top of its vertical side, refrigerant pipe 4h upstream end 4h-1 is to big Horizontal direction is caused to protrude given size, refrigerant pipe 4h downstream 4h-2 provides chi from bottom to general horizontal direction is prominent It is very little.And refrigerant pipe 4h upstream end 4h-1 connects refrigerant pipe 4g downstream via U-tube 21, under refrigerant pipe 4h Swim the upstream end that end 4h-2 connects refrigerant pipe 4i via inverted-loop tube 22.
In addition, in the example shown in Fig. 2, compared with refrigerant pipe 4h upstream end 4h-1, refrigerant pipe 4g downstream Hold it is above, compared with refrigerant pipe 4h downstream 4h-2 refrigerant pipe 4i upstream end also be located at top.In addition, scheming In 2, the aluminum refrigerant tube for using as refrigerant pipe 4h and being formed by aluminum or aluminum alloy is shown, in the following theory of reference picture 2 In bright, refrigerant pipe 4h is referred to as " aluminium refrigerant pipe 4h ".In addition, similarly, in the example shown in Fig. 2, show work The copper refrigerant pipe formed by copper or copper alloy is used for above-mentioned refrigerant pipe 4g, 4i, in the following explanation of reference picture 2 In, these refrigerant pipes 4g, 4i are referred to as " copper refrigerant pipe 4g " and " copper refrigerant pipe 4i ".And then for side Just illustrate, as shown in Fig. 2 using the direction of the interarea direction of outdoor heat converter 2 as fore-and-aft direction.
Fig. 3 is the schematic front figure of enlarged representation U-tube 21 and inverted-loop tube 22, and (a) represents U-tube 21, and (b) represents U Shape pipe 22.Shown in such as Fig. 3 (a), connection aluminium refrigerant pipe 4h upstream end 4h-1 and copper refrigerant pipe 4g downstream U-tube 21 formed towards the convex shape in downside.It is further described, U-tube 21, which has, to be formed towards the convex shape in downside U-shaped portion divide 21a, from one end thereof to general horizontal direction be extended have downstream extended portion 21b, from another End is extended to opposite general horizontal direction upstream side extended portion 21c.These U-shaped portion divide 21a, downstream to prolong It is the copper refrigerant pipe formed by copper or copper alloy to stretch setting unit 21b and upstream side extended portion 21c.In addition, in downstream Side extended portion 21b end eutectic bonding has the short sized straight tube part 21d formed by aluminum or aluminum alloy.
Such U-tube 21 is as shown in Fig. 2 its short sized straight tube part 21d openend passes through " soldering " and aluminum system Refrigerant tube 4h upstream end 4h-1 connections, upstream side extended portion 21c openend pass through " soldering " and copper refrigerant pipe 4g downstream connection.
According to such structure, the U-shaped portion using the U-tube 21 formed by copper or copper alloy divides 21a to capture moisture, It can prevent the moisture from being moved to aluminium refrigerant pipe 4h.Further, since it is bonded in advance by aluminum or aluminum alloy shape in U-tube 21 Into short sized straight tube part 21d, so much less U-tube 21 and copper refrigerant pipe 4g connection operation, even if U-tube 21 Easily it can also implement at the scene with aluminium refrigerant pipe 4h connection operation.
On the other hand, as shown in Fig. 3 (b), connection aluminium refrigerant pipe 4h downstream 4h-2 and copper refrigerant pipe 4i The inverted-loop tube 22 of upstream end formed towards the convex shape in upside.It is further described, inverted-loop tube 22, which has, forms direction The inverted U-shaped part 22a of the convex shape in upside, being extended from one end thereof to general horizontal direction has downstream to be extended Portion 22b, being extended from another end to opposite general horizontal direction has upstream side extended portion 22c.These are inverted U-shaped Part 22a, downstream extended portion 22b and upstream side extended portion 22c are the aluminium-made refrigeration formed by aluminum or aluminum alloy Agent pipe.In addition, the end eutectic bonding in downstream extended portion 22b has the short sized straight tube portion that is formed by copper or copper alloy Part 22d.
Such inverted-loop tube 22 is as shown in Fig. 2 its short sized straight tube part 22d openend passes through " soldering " and copper Refrigerant pipe 4i upstream end connection, upstream side extended portion 22c openend passes through " soldering " and aluminium refrigerant pipe 4h Downstream 4h-2 connections.
According to such structure, can prevent moisture from copper refrigerant pipe 4i to formed towards the convex shape in upside by The inverted U-shaped part 22a movements that aluminum or aluminum alloy is formed.In addition, the moisture for being attached to inverted U-shaped part 22a, can make its to Move copper refrigerant pipe 4i sides.And then due to being bonded to the short size formed by copper or copper alloy in advance in inverted-loop tube 22 Straighttube part 22d, so much less inverted-loop tube 22 and aluminium refrigerant pipe 4h connection operation, even inverted-loop tube 22 and copper Refrigerant pipe 4i processed connection operation easily can also be implemented at the scene.
Here, if the connecting portion in refrigerant pipe sets U-tube and inverted-loop tube, it can produce and be limited by space Situation.Such as in the case of Fig. 2 for, due to the limitation in space, in upside, connecting portion (that is, upstream end 4h-1) is difficult to set The inverted-loop tube towards the convex shape in upside is formed, is difficult to set formation towards downside in lower connection part (that is, downstream 4h-2) The U-tube of convex shape.Therefore, it is necessary to it is used separately U-tube and inverted-loop tube as shown in Figure 2 respectively.
In addition, as shown in Fig. 2 the inverted-loop tube 22 of above-mentioned downside and aluminium refrigerant pipe 4h downstream 4h-2 are formed For, 21a plumb line L is divided with respect to the U-shaped portion of the U-tube 21 of upside, it is inclined positioned at (front in Fig. 2) in the horizontal direction Move predetermined distance D position.Thus, even if the U-shaped portion of water droplet from the U-tube 21 of upside divides the 21a to fall, this can also be prevented Water droplet is attached to the inverted-loop tube 22 and aluminium refrigerant pipe 4h of downside.
In addition, the mode as the skew, as shown in Fig. 2 by the way that as above effect can be played certainly in fore-and-aft direction skew, It can also be offset in left and right directions, in this case, can also prevent water droplet from falling the inverted-loop tube 22 and aluminum for being attached to downside Refrigerant pipe 4h.Like this left and right directions offset in the case of, at least upside U-tube 21 U-shaped portion divide 21a stagger to than The position of outdoor heat converter 2 is more left in the eutectic bonding part of the inverted-loop tube 22 of downside, and thereby, it is possible to prevent moisture from falling And it is attached to inverted-loop tube 22 and aluminium refrigerant pipe 4h.
Fig. 4 is the schematic diagram in the inverted U-shaped portion of the place P3 near the four-way valve 12 being arranged at for explanation shown in Fig. 1.Such as Shown in Fig. 4, four-way valve 12 includes：The valve incorporating section 120 for making axle center be set for horizontal direction；It is downward from the valve incorporating section 120 Side be extended and with the first port 121, second port 122, the 4th port of refrigerant pipe 4d, 4e, 4g tubulose being connected 124；With from valve incorporating section 120 upward be extended and with the 3rd port 123 of the refrigerant pipe 4f tubuloses being connected.Also, When carrying out the switching of heating and cooling operating, four-way valve 12 is switched over.That is, cooling operate when, by make port 121 with It is respectively communicated with, and between refrigerant pipe 4d and refrigerant pipe 4e and will be made between port 123 and port 124 between port 122 It is respectively communicated between refrigerant tube 4f and refrigerant pipe 4g.On the other hand, during warming operation, by make port 121 and port 123 it Between be respectively communicated between port 122 and port 124, and by between refrigerant pipe 4d and refrigerant pipe 4f and refrigerant pipe 4e with It is respectively communicated between refrigerant pipe 4g.
In addition, in the example in fig. 4, in such four-way valve 12, at least the 3rd port 123 is using by copper or copper alloy shape Into duct member (copper refrigerant pipe) form.
On the other hand, the inverted-loop tube 23 shown in Fig. 4 has the inverted U-shaped part 23a formed towards the convex shape in upside, its Two ends, i.e. end of downstream side 23b and upstream-side-end 23c is respectively facing lower section and is extended with roughly the same length. These inverted U-shaped part 23a, end of downstream side 23b and upstream-side-end 23c are the aluminium refrigerant formed by aluminum or aluminum alloy Pipe.Also, there is the short sized straight tube part 23d formed by copper or copper alloy in end of downstream side 23b eutectic bondings.In addition, altogether Crystalline substance engagement be using eutectic reaction material joint method, make mother metal (base material) snugly into each other, with the fusing point of mother metal with Under temperature pressurizeed, engaged using in atoms permeating caused by composition surface, different types of metal can be made firm Ground engages.
Such inverted-loop tube 23 is as shown in figure 4, its short sized straight tube part 23d openend passes through " soldering " and four-way The upstream end connection of the 3rd port 123 formed by copper or copper alloy of valve 12.In addition, the upstream-side-end 23c of inverted-loop tube 23 Connected in the example in fig. 4 by the refrigerant pipe 4f (aluminium refrigerant pipe) of " soldering " with being formed by aluminum or aluminum alloy downstream Connect.
According to such structure, in attachment of moisture in the case of the 3rd port 123 of four-way valve 12, moisture can be prevented Moved to the inverted-loop tube 23 formed by aluminum or aluminum alloy and connected refrigerant pipe 4f.In addition for being attached to U-shaped portion point 23a moisture, it can be made to be moved to the side of the 3rd port 123 of four-way valve 12.And then due to being connect in advance in inverted-loop tube 23 Closing has the short sized straight tube part 23d formed by copper or copper alloy, so much less inverted-loop tube 23 by aluminum or aluminum alloy with being formed Refrigerant pipe 4f connection operation, even inverted-loop tube 23 and the 3rd port of four-way valve 12 formed by copper or copper alloy 123 connection operation easily can also be implemented at the scene.
In addition, here, be illustrated by taking the 3rd port 123 as an example, but similarly can certainly for other ports It is enough to be applicable the present invention.
Fig. 5 is the schematic diagram in the inverted U-shaped portion of the place P4 near the expansion valve 14 being arranged at for explanation shown in Fig. 1.Such as Shown in the Fig. 5, expansion valve 14 includes：The valve incorporating section 140 for making axle center be set for horizontal direction；From the valve incorporating section 140 to The first port 141 of the extended tubulose of general horizontal direction；With the second port 142 of tubulose extended downward. In addition, in the example of fig. 5, at least first port 141 in such expansion valve 14 utilizes the pipe formed by copper or copper alloy Part (copper refrigerant pipe) is formed.
On the other hand, the inverted-loop tube 24 shown in Fig. 5, which has to be formed towards the U-shaped portion of the convex shape in upside, divides 24a, and it two Individual end, i.e. end of downstream side 24b and upstream-side-end 24c is respectively facing lower section and upstream-side-end 24c compares end of downstream side 24b is extended downwards.These U-shaped portion divide 24a, end of downstream side 24b and upstream-side-end 24c to be to be closed by aluminium or aluminium The aluminium refrigerant pipe that gold is formed.Also, in the L font pipe portions that end of downstream side 24b eutectic bondings are formed by copper or copper alloy The end of upward opening possessed by part 24d.
Such inverted-loop tube 24 is as shown in figure 5, the end being open in the horizontal direction that its L font duct member 24d has leads to The upstream end that " soldering " is crossed with the first port 141 formed by copper or copper alloy of expansion valve 14 is connected.In addition, inverted-loop tube 24 Upstream-side-end 24c pass through " soldering " and the refrigerant pipe 4i (aluminium-made refrigerations that are formed by aluminum or aluminum alloy in the example of fig. 5 Agent pipe) downstream connection.
According to such structure, it can prevent from being attached to the moisture of first port 141 of expansion valve 14 to by aluminium or aluminium conjunction The inverted-loop tube 24 and connected refrigerant pipe 4i movements that gold is formed.In addition, divide 24a moisture for being attached to U-shaped portion, It can be made to be moved to the side of first port 141 of expansion valve 14.And then due to being bonded in advance by copper in inverted-loop tube 24 or The L font straighttube part 24d that copper alloy is formed, so much less inverted-loop tube 24 and the refrigerant pipe formed by aluminum or aluminum alloy The connection of 4i connection operation, even inverted-loop tube 24 and the first port 141 of the expansion valve 14 formed by copper or copper alloy is made Industry easily can also be implemented at the scene.
Alternatively, it is also possible to the downstream extended portion 22b such as the inverted-loop tube 22 illustrated using Fig. 3 (a), make The end of downstream side 24b of inverted-loop tube 24 turns to horizontal direction, anterior at it, is transformed to L font straighttube part 24d, and eutectic Engage short sized straight tube part 22d.In addition, in the above description, exemplified with U-tube 21, inverted-loop tube 22,23,24, By the structure of the duct member formed by aluminum or aluminum alloy and the duct member formed by copper or copper alloy " eutectic bonding ", still, this The mutual juncture not limited to this of a little duct members, can also use other junctures.For example, it is also possible to using being referred to as The method engaged in local flow's super-high-current of flash welding (flash butt), coating, soldering, heat-shrinkable tube etc., also may be used To utilize the combination of these methods.In addition, in the present embodiment, to setting U-shaped in four places of P1~P4 shown in Fig. 1 Portion or inverted U-shaped portion are illustrated, as long as but the duct member that is formed by aluminum or aluminum alloy and formed by copper or copper alloy The connecting portion of duct member, it is readily applicable to other positions.
And then not only in the case of connection aluminium refrigerant pipe with copper refrigerant pipe, in connection ionization tendency phase Also can in the case of the duct member formed to the duct member that big perishable material is formed with the relatively small material of ionization tendency The enough thought for being applicable the present invention.In this case, the relatively large duct member of ionization tendency can be regarded as above-mentioned aluminum Refrigerant pipe, and regard the relatively small duct member of ionization tendency as copper refrigerant pipe.
Industrial applicability
The present invention provides a kind of corrosion for the aluminium refrigerant pipe that can be more reliably prevented from being connected with copper refrigerant pipe Refrigerating circulatory device.
The explanation of reference
1 air conditioner
2 first heat exchangers (outdoor heat converter)
3 second heat exchangers (indoor heat converter)
4 around path
4g refrigerant pipes (copper refrigerant pipe)
4h refrigerant pipes (aluminium refrigerant pipe)
4i refrigerant pipes (copper refrigerant pipe)
12 four-way valves
13 compressors
14 expansion valves
21 U-tubes (U-shaped portion)
22 inverted-loop tubes (inverted U-shaped portion)
23 inverted-loop tubes (inverted U-shaped portion)
23 inverted-loop tubes (inverted U-shaped portion)

Claims (4)

  1. A kind of 1. refrigerating circulatory device, it is characterised in that：
    Including first heat exchanger and second heat exchanger, refrigerant is set to be handed over along the first heat exchanger is arranged at the second heat Pipe arrangement circulation between parallel operation, forms kind of refrigeration cycle,
    The refrigerating circulatory device includes：
    A part for the kind of refrigeration cycle is formed, the aluminium refrigerant pipe comprising aluminum or aluminum alloy；
    Other parts of the kind of refrigeration cycle are formed, the copper comprising copper or copper alloy being connected with the aluminium refrigerant pipe Refrigerant pipe；
    Configuration makes the refrigeration to be circulated between the first heat exchanger and the second heat exchanger in the kind of refrigeration cycle The expansion valve that the pressure of agent reduces；With
    Switch the four-way valve of the circulating direction of the refrigerant in the kind of refrigeration cycle,
    The aluminium refrigerant pipe is configured at the first heat exchanger, with one end of external connection from the first heat exchanger It is prominent,
    The aluminium refrigerant pipe and be arranged at outside the first heat exchanger with the expansion valve or the four-way valve Connection the copper refrigerant pipe connecting portion near, be provided with the aluminium refrigerant pipe is made it is convex towards upside The inverted U-shaped portion of shape,
    The inverted U-shaped portion and the connecting portion of the copper refrigerant pipe, are arranged at than the inverted U-shaped portion and first heat exchange The position of the connecting portion of device by the top.
  2. A kind of 2. refrigerating circulatory device, it is characterised in that：
    Including first heat exchanger and second heat exchanger, refrigerant is set to be handed over along the first heat exchanger is arranged at the second heat Pipe arrangement circulation between parallel operation, forms kind of refrigeration cycle,
    The refrigerating circulatory device includes：
    A part for the kind of refrigeration cycle is formed, the aluminium refrigerant pipe comprising aluminum or aluminum alloy；
    Other parts of the kind of refrigeration cycle are formed, the copper comprising copper or copper alloy being connected with the aluminium refrigerant pipe Refrigerant pipe；
    Configuration makes the refrigeration to be circulated between the first heat exchanger and the second heat exchanger in the kind of refrigeration cycle The expansion valve that the pressure of agent reduces；With
    Switch the four-way valve of the circulating direction of the refrigerant in the kind of refrigeration cycle,
    The aluminium refrigerant pipe is configured at the first heat exchanger, with one end of external connection from the first heat exchanger It is prominent,
    The aluminium refrigerant pipe and be arranged at outside the first heat exchanger with the expansion valve or the four-way valve Connection the copper refrigerant pipe connecting portion near, be provided with the copper refrigerant pipe is made it is convex towards downside The U-shaped portion of shape,
    The connecting portion of the U-shaped portion and the copper refrigerant pipe being arranged at outside the first heat exchanger, is arranged at ratio The position of the connecting portion of the U-shaped portion and the first heat exchanger by the top.
  3. 3. refrigerating circulatory device as claimed in claim 1, it is characterised in that：
    The inverted U-shaped portion utilizes the duct member that is formed by aluminum or aluminum alloy to form, one end eutectic bonding of the duct member have by The duct member for the straight tube-like that copper or copper alloy are formed.
  4. 4. refrigerating circulatory device as claimed in claim 2, it is characterised in that：
    The U-shaped portion utilizes the duct member formed by copper or copper alloy to form, and has in one end eutectic bonding of the duct member by aluminium Or the duct member of the straight tube-like of aluminium alloy formation.
CN201510558064.8A 2011-03-04 2011-03-04 Refrigerating circulatory device Active CN105180523B (en)

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CN201180066624.8A CN103348201B (en) 2011-03-04 2011-03-04 Refrigerating circulatory device
PCT/JP2011/001296 WO2012120554A1 (en) 2011-03-04 2011-03-04 Refrigeration cycle apparatus

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* Cited by examiner, † Cited by third party
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JP5354004B2 (en) 2011-12-22 2013-11-27 ダイキン工業株式会社 Air conditioner
JP6669187B2 (en) * 2018-03-30 2020-03-18 ダイキン工業株式会社 Refrigeration cycle device

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59184065U (en) * 1983-05-25 1984-12-07 ダイキン工業株式会社 Heat pump air conditioning system
JPH04359797A (en) * 1991-06-05 1992-12-14 Showa Alum Corp Heat exchanger
JP2004028355A (en) * 2002-06-21 2004-01-29 Hitachi Home & Life Solutions Inc Refrigerator
JP2005090761A (en) * 2003-09-12 2005-04-07 Matsushita Electric Ind Co Ltd Air conditioner
JP2010112667A (en) * 2008-11-10 2010-05-20 Mitsubishi Electric Corp Air conditioner

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CN103348201B (en) 2015-10-07

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