CN1182187A - Air conditioner - Google Patents
Air conditioner Download PDFInfo
- Publication number
- CN1182187A CN1182187A CN 97120212 CN97120212A CN1182187A CN 1182187 A CN1182187 A CN 1182187A CN 97120212 CN97120212 CN 97120212 CN 97120212 A CN97120212 A CN 97120212A CN 1182187 A CN1182187 A CN 1182187A
- Authority
- CN
- China
- Prior art keywords
- heat
- cold
- producing medium
- air conditioner
- exchange tube
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Air Filters, Heat-Exchange Apparatuses, And Housings Of Air-Conditioning Units (AREA)
- Other Air-Conditioning Systems (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention discloses an air conditioner capable of securing sufficient safety about the sue of a refrigerant which does not destroy an ozone layer. This air conditioner is provided with an outdoor unit A and an indoor unit B and uses a high pressure refrigerant, a combustible refrigerant and a toxic refrigerant as a refrigerant which flows in a refrigeration cycle pipeline. Out of the refrigeration cycle pipelines, the pressure resistant strength of a pipeline on the side of the indoor unit B is specified to be larger than that of a pipeline on the side of the outdoor unit A. When the pressure of the refrigerant is subjected to an abnormal rise, an unexpected state, such as piping damage, and refrigerant leakage is generated in the pipeline on the outdoor side thus, this can avoid dwelling inside.
Description
The present invention relates to be suitable for the air conditioner of variety classes cold-producing medium, pressure.
In the prior art, the cold-producing medium that uses in the air conditioner has HCFC cold-producing medium (chlorofluorocarbon that contains protium), and wherein the most frequently used is the HCFC22 cold-producing medium.But these HCFC cold-producing mediums contain chlorine, so exist the problem that damages the ozone layer.
The ozone layer destroying coefficient is zero cold-producing medium, and HFC (fluorocarbon that contains protium) cold-producing medium, CO are arranged
2Cold-producing medium (R744).Also consider to adopt HFE (hydrogen fluorine ether) cold-producing medium in the future.
For the HFC cold-producing medium, once considered the unitary system cryogen of HFC-32 (Difluoroethane), HFC-125 (pentafluoroethane), HFC-134a (HFC-134a) etc., perhaps by the composite R410A cold-producing medium of these unitary system cryogens (HFC-125 of the HFC-32 of 50% weight and 50% weight mixes), R407C cold-producing medium (mix refrigerant of HFC-32, HFC-125 and HFC-134a).In the hydrocarbon class, once considered propane L3H8 (R-290) etc.
The fin-tube type heat exchanger that is used for air conditioner or other refrigerating machine, its structure is, several tabular heat release fins are arranged setting, some U-shaped heat-exchange tubes pass these heat release fins and fix it, among these heat-exchange tubes,, insert and connecting the both ends of U-shaped tube connector in the end of each heat-exchange tube adjacent one another are, insertion by means of this U-shaped pipe connects, and each heat-exchange tube is communicated with successively.Its unitary construction such as Fig. 8 and shown in Figure 9, it wants cage structure as shown in figure 10.
The 1st, several rectangular plate shape heat release fin 2 apart certain intervals ground that heat exchanger, the aluminium that heat-conductive characteristic is good etc. are made are arranged, and pipe 3 passes these heat release fins 2 and fixing.
Compressor, exapnsion valve and other heat exchanger are connected with this heat exchanger 1, constitute kind of refrigeration cycle.
Both ends 31a, the 31a of each heat-exchange tube 31 and both ends 32a, the 32a of each return bend 32 are connected and fixed with soldering.
Both ends 31a, the 31a of each heat-exchange tube 31 stretch out predetermined length (K from heat release fin 2
2+ K
1), in this extension, enlarge caliber and form tubaeform part 31b.Caliber enlarged 31a, the 31a at two ends are also referred to as recess portion, are positioned at apart from opening K
1Scope in, its internal diameter R
2The external diameter S that can hold return bend 32
2
Can see between the outer peripheral face of the inner peripheral surface of heat-exchange tube 31 and return bend 32 gappedly from figure, but in fact this gap is connected by soldering and does not exist.
Among each heat-exchange tube 31, on an end 31a of the heat-exchange tube 31 of cold-producing medium inflow side and outflow side, connecting outside pipe arrangement 4, this outside pipe arrangement 4 is used to connect other kind of refrigeration cycle machinery with inserting.This inserts ways of connecting and connects identical with the insertion of above-mentioned return bend 32.
The ozone layer destroying coefficient is zero HFC cold-producing medium or CO
2Cold-producing medium, the HCFC22 that its pressure ratio adopts before is much higher.Therefore, when using this cold-producing medium, kind of refrigeration cycle machinery must be high pressure resistant.
In heat exchanger 1, there is following problem in the structure that is connected of its heat-exchange tube 31 and return bend 32.
(1) be expanded into flaring part 31b place, the stress that caused by refrigerant pressure is concentrated, and makes this part lack durability.
(2) from corresponding to length K 2 parts of heat release fin 2, a little less than its strength ratio caliber expansion section 31a to the heat-exchange tube 31 the 31a of caliber expansion section.
(3) be used to weld the scolder of heat-exchange tube 31 inner faces and return bend 32 outer peripheral faces, not only rest on this inner peripheral surface and the contact area of locating side face, also be expressed into heat-exchange tube 31 inside, cause that scolder stops up, flowing of this scolder congestion affects cold-producing medium, thus the running of air conditioner etc. influenced.
The present invention makes in view of the above problems, and its 1st purpose is to provide a kind of air conditioner, and this air conditioner uses the cold-producing medium that do not damage the ozone layer, promptly mixed the HCFC alternative refrigerant of the R410A etc. of HFC32 or HFC125, and can guarantee safety.
The 2nd purpose of the present invention provides a kind of air conditioner, and the stress that this air conditioner causes for refrigerant pressure is concentrated has enough durability and intensity, is suitable for using high-pressure refrigerant, and, during the welding of heat-exchange tube, can eliminate scolder and stop up, guarantee that flow of refrigerant is smooth and easy.
The 3rd purpose of the present invention provides a kind of air conditioner, and this air conditioner is concentrated for the stress of outside tubing connection portion has enough durability and intensity, is suitable for using high-pressure refrigerant.
For the present invention that achieves the above object takes following technical scheme:
A kind of air conditioner has outdoor unit and indoor unit, and high-pressure refrigerant flows in the pipe arrangement of kind of refrigeration cycle, it is characterized in that among the pipe arrangement of kind of refrigeration cycle, the compressive resistance of indoor unit side line is greater than the compressive resistance of outdoor unit side line.
Described air conditioner is characterized in that, the diameter of indoor unit side line is less than the diameter of outdoor unit side line.
Described air conditioner is characterized in that, the pipe thickness of indoor unit side line is greater than the pipe thickness of outdoor unit side line.
Described air conditioner is characterized in that, the strength of materials of indoor unit side line is greater than the strength of materials of outdoor unit side line.
Described air conditioner is characterized in that, the intensity of outdoor unit side line privileged site is less than the intensity at this other position of outdoor unit side line, and when the refrigerant pressure abnormal ascending, cold-producing medium leaks from this privileged site.
Described air conditioner is characterized in that, the privileged site of outdoor unit side line surrounds with cap assembly.
A kind of air conditioner, it has heat exchanger, the structure of this heat exchanger is, some heat-exchange tubes pass the heat release fin, among these heat-exchange tubes,, connecting the both ends of tube connector in the end of adjacent each heat-exchange tube with inserting, by this insertion connection each heat-exchange tube is communicated with successively, cold-producing medium flows therein; It is characterized in that:
Both ends with each heat-exchange tube of above-mentioned heat exchanger, expander forms tubaeform and expansion tube department, with the both ends of tube connector, the draw forms tubaeform and draw portion, and the draw portion of this tube connector is inserted into the position of the expansion tube department of each heat-exchange tube with the lining.
Described air conditioner is characterized in that, the through side of the length of the draw portion of tube connector to heat exchanger be the heat release fin near.
A kind of air conditioner, have heat exchanger, the structure of this heat exchanger is, some heat-exchange tubes pass the heat release fin, these heat-exchange tubes are communicated with successively, and high-pressure refrigerant flows therein, it is characterized in that, among the heat-exchange tube of above-mentioned heat exchanger, the mechanical strength of heat-exchange tube that is positioned at cold-producing medium inflow side or outflow side is greater than the mechanical strength of other heat-exchange tube.
Described air conditioner is characterized in that, the pipe thickness of heat-exchange tube that is positioned at cold-producing medium inflow side or outflow side is greater than the pipe thickness of other heat-exchange tube.
Described air conditioner is characterized in that, is positioned at the heat-exchange tube of cold-producing medium inflow side or outflow side, is used to accept the join domain that outside pipe arrangement inserts, and is length at tube axial direction as far as possible.
Described air conditioner is characterized in that, the cold-producing medium that flows in each heat-exchange tube and tube connector is the HFC cold-producing medium, and the saturation pressure of this HFC cold-producing medium in the time of 50 ℃ is more than 2500 kPas.
Described air conditioner is characterized in that, the cold-producing medium that flows in the pipe arrangement of kind of refrigeration cycle is the mix refrigerant of Difluoroethane and pentafluoroethane.
Described air conditioner is characterized in that, the cold-producing medium that flows in the pipe arrangement of kind of refrigeration cycle is HFC cold-producing medium, HFE cold-producing medium, CO
2Cold-producing medium, wherein a kind of of cold-producing medium who contains hydrocarbon class material or ammonia.
The air conditioner of the 1st invention has outdoor unit and indoor unit, and high-pressure refrigerant flows in the pipe arrangement of kind of refrigeration cycle, it is characterized in that among the pipe arrangement of kind of refrigeration cycle, the compressive resistance of indoor unit side line is greater than the compressive resistance of outdoor unit side line.
The air conditioner of the 2nd invention is to increase following feature in the 1st invention, that is, the diameter of indoor unit side line is less than the diameter of outdoor unit side line.
The air conditioner of the 3rd invention is to increase following feature in the 1st invention, that is, the pipe thickness of indoor unit side line is greater than the pipe thickness of outdoor unit side line.
The air conditioner of the 4th invention is to increase following feature in the 1st invention, that is, the strength of materials of indoor unit side line is greater than the strength of materials of outdoor unit side line.
The air conditioner of the 5th invention is to increase following feature in the 1st invention, that is, the intensity of the privileged site of outdoor unit side line is less than the intensity at other position of this outdoor unit side line, and when the refrigerant pressure abnormal ascending, cold-producing medium leaks from this privileged site.
The air conditioner of the 6th invention is to increase following feature in the 5th invention, that is, the privileged site of outdoor unit side line surrounds with cap assembly.
The air conditioner of the 7th invention, have heat exchanger, the structure of this heat exchanger is, some heat-exchange tubes pass the heat release fin, among these heat-exchange tubes,, connecting the both ends of tube connector in the end of adjacent each heat-exchange tube with inserting, by this insertion connection each heat-exchange tube is communicated with successively, cold-producing medium flows therein; It is characterized in that, with the both ends of each heat-exchange tube of above-mentioned heat exchanger, expander forms tubaeform and expansion tube department, with the both ends of tube connector, the draw forms tubaeform and draw portion, and the draw portion of this tube connector is inserted into the position of the expansion tube department of each heat-exchange tube with the lining.
The air conditioner of the 8th invention is to increase following feature in the 7th invention, that is, the through side of the length of the draw portion of tube connector to heat exchanger be the heat release fin near.
The air conditioner of the 9th invention, have heat exchanger, the structure of this heat exchanger is, some heat-exchange tubes pass the heat release fin, these heat-exchange tubes are communicated with successively, and high-pressure refrigerant flows therein, it is characterized in that, among the heat-exchange tube of above-mentioned heat exchanger, the mechanical strength of heat-exchange tube that is positioned at cold-producing medium inflow side or outflow side is greater than the mechanical strength of other heat-exchange tube.
The air conditioner of the 10th invention is to increase following feature in the 9th invention, that is, the pipe thickness of heat-exchange tube that is positioned at cold-producing medium inflow side or outflow side is greater than the pipe thickness of other heat-exchange tube.
The air conditioner of the 11st invention is to increase following feature in the 9th invention,, is positioned at the heat-exchange tube of cold-producing medium inflow side or outflow side that is, is used to accept the join domain that outside pipe arrangement inserts, and is long as far as possible at tube axial direction.
The air conditioner of the 12nd invention is to increase following feature in the 1st, the 7th or the 9th invention, that is, the cold-producing medium that flows in each heat-exchange tube and tube connector is the HFC cold-producing medium, and the saturation pressure of this HFC cold-producing medium in the time of 50 ℃ is more than 2500 kPas.
The air conditioner of the 13rd invention is to increase following feature in the 1st, the 7th or the 9th invention, that is, the cold-producing medium that flows in the pipe arrangement of kind of refrigeration cycle is the mix refrigerant of Difluoroethane and pentafluoroethane.
The air conditioner of the 14th invention is to increase following feature in the 1st, the 7th or the 9th invention, that is, the cold-producing medium that flows in the pipe arrangement of kind of refrigeration cycle is HFC cold-producing medium, HEF cold-producing medium, CO
2Cold-producing medium, wherein a kind of of cold-producing medium who contains hydrocarbon class material or ammonia.
In the 1st to the 6th invention, refrigerant pressure abnormal ascending and the gas that causes leak and easily occur in the outside, as the 12nd to the 14th invention, when adopting the high pressure alternative refrigerant of HCFC cold-producing medium before, also can guarantee safety.
7th, in the 8th invention, the coupling part of heat-exchange tube has enough durability and intensity, and eliminates the scolder obstruction when welding, and adopts high-pressure refrigerant also can guarantee safety.
In the 9th to the 11st invention, concentrate for the stress of outside tubing connection portion to have enough durability and intensity, so, as Figure 12 to the 14 inventions like that, also can guarantee safety during the high pressure alternative refrigerant of employing HCFC cold-producing medium.
Good effect of the present invention:
As mentioned above, air conditioner of the present invention, among the kind of refrigeration cycle pipe arrangement, make the compressive resistance of the compressive resistance of indoor unit side line greater than the outdoor unit side line, when refrigerant pressure raise unusually, gas leaked and easily occurs in the outside, so, even adopt high-pressure refrigerant to replace the HCFC cold-producing medium, also can guarantee safety.
Because each heat-exchange tube both ends expander of the heat exchanger among the present invention is formed tubaeform and expansion tube department, and, the both ends draw of tube connector is formed tubaeform and draw portion, the draw portion of this tube connector is inserted into the more inboard position of expansion tube department of each heat-exchange tube, so, in the coupling part of heat-exchange tube, the stress that causes for refrigerant pressure is concentrated has enough durability and intensity.And, when welding, eliminated the scolder obstruction, guarantee that the smooth and easy of cold-producing medium flows, and can improve the air conditioner security of using the high pressure alternative refrigerant.
In addition, because among each heat-exchange tube of heat exchanger, the mechanical strength of heat-exchange tube that is positioned at cold-producing medium inflow side or outflow side is bigger than the mechanical strength of other heat-exchange tube, so, also have enough durability and intensity to the stress of outside pipe arrangement junction is concentrated, can improve the security of the air conditioner that uses the high pressure alternative refrigerant.
The figure of flow of refrigerant situation when Fig. 1 is the structure of kind of refrigeration cycle in the expression one embodiment of the invention air conditioner and refrigeration.
Fig. 2 is the figure of flow of refrigerant situation when the structure of kind of refrigeration cycle and heating in the expression air conditioner shown in Figure 1.
Fig. 3 is the sectional drawing of the heat exchanger configuration in expression one embodiment of the invention air conditioner.
Fig. 4 is the figure of the return bend structure in the presentation graphs 3.
Fig. 5 is the sectional drawing of presentation graphs 3 variation structure.
Fig. 6 is the sectional drawing of the variation structure of the outside tubing connection portion of heat exchanger in the expression air conditioner shown in Figure 3.
Fig. 7 is the sectional drawing of another variation structure of the outside tubing connection portion of heat exchanger in the expression air conditioner shown in Figure 3.
Fig. 8 is the stereogram of the heat exchanger configuration in this embodiment of expression and the existing air conditioner.
Fig. 9 is the figure that wants cage structure in the presentation graphs 8.
Figure 10 is the schematic partial sectional view of the existing heat exchanger configuration of expression.
Below, with reference to description of drawings one embodiment of the invention.Among the figure, annotate with same numeral with part identical among Fig. 8, Fig. 9, Figure 10, its detailed description is omitted.
Fig. 1 and Fig. 2 represent the unitary construction of air conditioner.A is an outdoor unit, and B is an indoor unit.
In this outdoor unit A and indoor unit B, carrying out the heat pump type refrigerating circulation.
That is, condenser 43 is connected with the outlet of compressor 41 by cross valve 42, and evaporimeter 45 is connected with this condenser 43 by electronic exapnsion valve 44.The suction inlet of compressor 41 is connected with evaporimeter 45 by cross valve 42.
During refrigeration, cross valve 42 is set in the state of Fig. 1, the cold-producing medium of discharging from compressor 41 flows to cross valve 42, condenser 43, electronic exapnsion valve 44, evaporimeter 45 as shown by arrows, and the cold-producing medium that has passed through evaporimeter 45 is inhaled into compressor 41 by cross valve 42.
During heating, cross valve 42 is set in the state of Fig. 2, the cold-producing medium of discharging from compressor 41 flows to cross valve 42, condenser 45, electronic exapnsion valve 44, evaporimeter 43 as shown by arrows, and the cold-producing medium that has passed through evaporimeter 43 is inhaled into compressor 41 by cross valve 42.
Cold-producing medium in the kind of refrigeration cycle is that the ozone layer destroying coefficient is zero cold-producing medium, for example HFC cold-producing medium, HFE cold-producing medium (hydrogen fluorine ether), CO
2Cold-producing medium, propane L
3H
8(R-290) etc. the cold-producing medium that contains hydrocarbon class material or ammonia.Wherein, make the HFC cold-producing medium, the unitary system cryogen that HFC-32 (Difluoroethane), HFC-125 (pentafluoroethane), HFC-134a (HFC-134a) etc. are arranged, perhaps, be the mixing of these cold-producing mediums, for example R410A cold-producing medium (HFC-125 of the HFC-32 of 50% weight and 50% weight mixes), R407C (mixing of HFC-32, HFC-125, HFC134a) etc.Also can use the propane L of hydrocarbon class
3H
8(R-290).
But, these refrigerant pressure height, poisonous, and have combustibility.Must guarantee safety in use.
In order to ensure safety,, set greater than the compressive resistance of the outdoor piping 51 that is used for outdoor unit A the compressive resistance that is used for the indoor tube 52 that indoor unit B connects.
The compressive resistance of indoor tube 52 set under the situation greater than the compressive resistance of outdoor piping 51, when refrigerant pressure raises unusually, situations such as pipe arrangement breakage, cold-producing medium leakage are compared with indoor (residential area) pipe arrangement 52, take place in outside pipe arrangement 52 earlier.Like this, can prevent to produce in indoor (residential area) pipe arrangement 52 breakage or cold-producing medium leakage.Even adopt pressure height, combustibility, poisonous cold-producing medium, the gas of fire or insalubrity can not relate to the indoor people that lives, and can guarantee safety.
In kind of refrigeration cycle; pressure switch or compressor motor current detector etc. are set detect the unusual device that raises of refrigerant pressures, detecting when unusual, the running of compressor is stopped or reducing the rotation number compressed etc.; protect control, this is common way.When this protection control lost function because of the failure and other reasons of checkout gear, as mentioned above, the breakage of pipe arrangement, cold-producing medium leakage etc. occurred in the pipe arrangement 51 of outside, can make the indoor people of living not be subjected to its evil.
The compressive resistance of indoor tube 52 set for example have greater than the concrete way of the compressive resistance of outdoor piping 51 following etc.: (1) does the external diameter of indoor tube 52 less than the external diameter of outdoor piping 51.(2) do the pipe thickness of indoor tube 52 greater than the pipe thickness of outdoor piping 51.(3) make the strength of materials of the strength of materials of indoor tube 52 greater than outdoor piping 51.(4) make the intensity at other position of this pipe arrangement 51 of strength ratio of certain privileged site of outdoor piping 51 slightly little.
When doing less than the external diameter of outdoor piping 51, can lower the stress of refrigerant pressure to the external diameter of indoor tube 52 to indoor tube 52.
If the external diameter of indoor tube 52 is d
1, pipe thickness is t
1, material allowable stress value is k
1, allowable pressure is p
2The time, p then
1=k
1(t
2/ d
1).
If the external diameter of outdoor piping 51 is d
2, pipe thickness is t
2, material allowable stress value is k
2, allowable pressure is p
2The time, p then
2=k
2(t
2/ d
2).
Therefore, can obtain p
1/ p
2=k
1/ k
2T
2/ t
2D
1/ d
2Relation.According to this relation, select p as shown in the formula (a)～(c)
1＞p
2Combination, can set the compressive resistance of indoor tube 52 to such an extent that open the compressive resistance of outdoor piping 51 greatly.
(a) t
1=t
2, k
1=k
2The time, d
1＜d
2
(b) d
1=d
2, k
1=k
2The time, t
1＞t
2
(c) t
1=t
2, d
1=d
2The time, k
1＞k
2
Setting the compressive resistance of indoor tube 52 greater than one of concrete way of the compressive resistance of outdoor piping 51, is above-mentioned (4), that is, the intensity of certain privileged site that makes pipe arrangement 5 is less than the intensity at other position of this pipe arrangement 51.Like this, when refrigerant pressure raise unusually, situations such as the damage of pipe arrangement or cold-producing medium leakage occurred in the privileged site of outside pipe arrangement 51.
In this structure, surround the privileged site of pipe arrangement 51, can prevent or reduce cold-producing medium and leak influence other parts of outdoor unit A with cap assembly.
Below, another embodiment is described.Among this embodiment,, be the heat exchanger that has high withstand voltage properties for the such high-pressure refrigerant of R-410A as the heat exchanger 1 of condenser 43 and evaporimeter 45 uses.Fig. 3 and Fig. 4 represent the cage structure of wanting of this heat exchanger.The unitary construction of this heat exchanger 1 and Fig. 8, shown in Figure 9 identical.
Both ends 32a, the 32a of return bend 32, through forging processing, the draw forms tubaeform 32b and the 32a of draw portion, 32a, and the 32a of this draw portion, 32a are inserted into expansion tube department 31a, 31a more inboard of heat-exchange tube 31.
Along the 32a of draw portion of heat-exchange tube 31 tube axial directions, the length L a of 32a, be set at the position that can reach corresponding to heat exchanger side end face heat release fin 2.Along the length L b of tubaeform 32b, 32b of heat-exchange tube 31 tube axial directions, be set at and equal in length along heat-exchange tube 31 tube axial directions tubaeform 31b, 31b.
Among the figure, can see between heat-exchange tube 31 inner peripheral surfaces and return bend 32 outer peripheral faces gappedly, but in fact this gap is minimum, perhaps with the soldering welding and do not exist.This lap couples together return bend 32 and heat-exchange tube 31 by soldering.
According to this structure, for the part (length=k that stretches out in heat release fin 2 of heat-exchange tube 31
1+ k
2), the outer peripheral face of return bend 32 and its tight contact form dual pipe structure herein.
Because this dual pipe structure at the whole join domain of heat-exchange tube 31 with return bend 32, can obtain high strength and durability.
Promptly, bear the stress that refrigerant pressure (interior pressure) produces jointly by tubaeform 31b, the 31b both sides of tubaeform 32b, 32b of return bend 32 and heat-exchange tube 31 and concentrate, stress is concentrated can avoid resembling in the prior art only acts on tubaeform 31b, the 31b of heat-exchange tube 31.
And, because the lap of heat-exchange tube 31 inner peripheral surfaces and return bend 32 outer peripheral faces is longer along the pipe range direction, so welding can not be expressed into heat-exchange tube 31 the insides with solder, can carry out good welding.Therefore, do not have scolder to stop up in the inside of heat-exchange tube 31, can guarantee that the smooth and easy of cold-producing medium flows.
As shown in Figure 5, the length of the 32a of draw portion, the 32a of return bend 32 is prolonged, make the 32a of this draw portion, 32a further reach side in the heat exchanger from the position corresponding to heat release fin 2, then heat-exchange tube 31 is more with the lap of return bend 32, can improve intensity and durability more.
As shown in Figure 9, among each heat-exchange tube 31, end at the heat-exchange tube 31 of cold-producing medium inflow side and inflow side, connecting outside pipe arrangement 4 with inserting, this outside pipe arrangement 4 is used to connect other kind of refrigeration cycle parts, this outside pipe arrangement 4 inserts the heat-exchange tube 31 that is connecting, and as Fig. 6, ground shown in Figure 7, sets its mechanical strength bigger than other the mechanical strength of heat-exchange tube 31.
Make the mechanical strength of inserting the heat-exchange tube 31 that is connecting outside pipe arrangement 4 bigger than the mechanical strength of other heat-exchange tube 31, its concrete way as shown in Figure 6, do pipe thickness bigger than other heat-exchange tube 31, perhaps as shown in Figure 7, the join domain (brazing area) of accepting outside pipe arrangement 4 is long as much as possible along tube axial direction.
The connecting portion of pipe arrangement 4 and heat-exchange tube 31 externally, except the concentrated stress that refrigerant pressure causes was arranged, the stress that also has the vibration of vibration of compressor or air blast to cause was concentrated.But, because its mechanical strength is big, so, even effect has two kinds of above-mentioned collection power to concentrate, also can sustain.And low cost of manufacture.
Fig. 3 is in embodiment illustrated in fig. 7, and cold-producing medium is the R-410A that contains the above HFC-32 of 45% weight that adopts, the saturation pressure of this cold-producing medium in the time of 50 ℃ be 2500kpa (kPa) more than.With respect to existing R-22 cold-producing medium (saturation pressure during 65 ℃ of condensation temperatures is 2800kpa), though need high pressure resistant design, the heat exchanger of Fig. 3 to Fig. 7 structure has the enough high strength and the durability that can adapt to this cold-producing medium.
The present invention is not limited to the foregoing description, in the scope that does not change principal character, can do various changes.
Claims (14)
1. an air conditioner has outdoor unit and indoor unit, and high-pressure refrigerant flows in the pipe arrangement of kind of refrigeration cycle, it is characterized in that among the pipe arrangement of kind of refrigeration cycle, the compressive resistance of indoor unit side line is greater than the compressive resistance of outdoor unit side line.
2. air conditioner as claimed in claim 1 is characterized in that the diameter of indoor unit side line is less than the diameter of outdoor unit side line.
3. air conditioner as claimed in claim 1 is characterized in that the pipe thickness of indoor unit side line is greater than the pipe thickness of outdoor unit side line.
4. air conditioner as claimed in claim 1 is characterized in that the strength of materials of indoor unit side line is greater than the strength of materials of outdoor unit side line.
5. air conditioner as claimed in claim 1 is characterized in that, the intensity of outdoor unit side line privileged site is less than the intensity at this other position of outdoor unit side line, and when the refrigerant pressure abnormal ascending, cold-producing medium leaks from this privileged site.
6. air conditioner as claimed in claim 5 is characterized in that the privileged site of outdoor unit side line surrounds with cap assembly.
7. air conditioner, it has heat exchanger, the structure of this heat exchanger is, some heat-exchange tubes pass the heat release fin, among these heat-exchange tubes,, connecting the both ends of tube connector in the end of adjacent each heat-exchange tube with inserting, by this insertion connection each heat-exchange tube is communicated with successively, cold-producing medium flows therein; It is characterized in that:
Both ends with each heat-exchange tube of above-mentioned heat exchanger, expander forms tubaeform and expansion tube department, with the both ends of tube connector, the draw forms tubaeform and draw portion, and the draw portion of this tube connector is inserted into the position of the expansion tube department of each heat-exchange tube with the lining.
8. air conditioner as claimed in claim 7 is characterized in that, the through side of the length of the draw portion of tube connector to heat exchanger be the heat release fin near.
9. air conditioner, have heat exchanger, the structure of this heat exchanger is, some heat-exchange tubes pass the heat release fin, these heat-exchange tubes are communicated with successively, and high-pressure refrigerant flows therein, it is characterized in that, among the heat-exchange tube of above-mentioned heat exchanger, the mechanical strength of heat-exchange tube that is positioned at cold-producing medium inflow side or outflow side is greater than the mechanical strength of other heat-exchange tube.
10. air conditioner as claimed in claim 9 is characterized in that, the pipe thickness of heat-exchange tube that is positioned at cold-producing medium inflow side or outflow side is greater than the pipe thickness of other heat-exchange tube.
11. air conditioner as claimed in claim 9 is characterized in that, is positioned at the heat-exchange tube of cold-producing medium inflow side or outflow side, is used to accept the join domain that outside pipe arrangement inserts, and is length at tube axial direction as far as possible.
12., it is characterized in that the cold-producing medium that flows in each heat-exchange tube and tube connector is the HFC cold-producing medium as claim 1 or 7 or 9 described air conditioners, the saturation pressure of this HFC cold-producing medium in the time of 50 ℃ is more than 2500 kPas.
13., it is characterized in that the cold-producing medium that flows is the mix refrigerant of Difluoroethane and pentafluoroethane as claim 1 or 7 or 9 described air conditioners in the pipe arrangement of kind of refrigeration cycle.
14., it is characterized in that the cold-producing medium that flows is HFC cold-producing medium, HFE cold-producing medium, CO as claim 1 or 7 or 9 described air conditioners in the pipe arrangement of kind of refrigeration cycle
2Cold-producing medium, wherein a kind of of cold-producing medium who contains hydrocarbon class material or ammonia.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29526696A JP3454647B2 (en) | 1996-11-07 | 1996-11-07 | Air conditioner |
| JP295266/96 | 1996-11-07 | ||
| JP295266/1996 | 1996-11-07 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1182187A true CN1182187A (en) | 1998-05-20 |
| CN1155781C CN1155781C (en) | 2004-06-30 |
Family
ID=17818374
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB971202125A Expired - Fee Related CN1155781C (en) | 1996-11-07 | 1997-11-05 | Air conditioner |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP3454647B2 (en) |
| CN (1) | CN1155781C (en) |
| TW (1) | TW360387U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103620336A (en) * | 2011-07-05 | 2014-03-05 | 夏普株式会社 | Heat exchanger and air conditioner equipped with same |
| CN104456721A (en) * | 2013-09-13 | 2015-03-25 | 三菱电机株式会社 | Refrigeration cycle device |
| CN108351138A (en) * | 2015-11-12 | 2018-07-31 | 三菱电机株式会社 | Air-conditioning |
| CN108885038A (en) * | 2016-03-28 | 2018-11-23 | 三菱电机株式会社 | Outdoor unit |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19983376T1 (en) * | 1998-07-14 | 2001-06-28 | Schlumberger Technologies Inc | Device, method and system for a liquid-based temperature change stress control of electronic components with a wide range and quick response |
| JP2000249384A (en) * | 1999-02-25 | 2000-09-12 | Daikin Ind Ltd | Freezer |
| JP3903851B2 (en) | 2002-06-11 | 2007-04-11 | 株式会社デンソー | Heat exchanger |
| JP2007093084A (en) * | 2005-09-28 | 2007-04-12 | Toshiba Kyaria Kk | Air-conditioner |
| JP2010260398A (en) * | 2009-04-30 | 2010-11-18 | Mitsubishi Electric Corp | Air conditioner for vehicle |
| CN102374582A (en) * | 2010-08-05 | 2012-03-14 | 隋榕育 | Air-duct-type one-drivers-two air conditioner indoor machine |
| JP5477315B2 (en) * | 2011-03-07 | 2014-04-23 | 三菱電機株式会社 | Refrigeration air conditioner |
| CN104061644B (en) * | 2014-06-26 | 2017-01-18 | 中国科学院宁波材料技术与工程研究所 | Rapid cooling device |
| GB2545109B (en) * | 2014-09-25 | 2020-09-30 | Mitsubishi Electric Corp | Refrigerant pipe, method of manufacturing the refrigerant pipe, and heat exchanger including the refrigerant pipe |
| CN110940042B (en) * | 2018-09-21 | 2021-05-18 | 奥克斯空调股份有限公司 | Refrigerant leakage detection method and air conditioning device |
| JP6865809B2 (en) * | 2019-12-24 | 2021-04-28 | 三菱電機株式会社 | Air conditioner |
| JP7227512B2 (en) * | 2021-04-28 | 2023-02-22 | ダイキン工業株式会社 | Piping connection structure and refrigeration cycle device |
-
1996
- 1996-11-07 JP JP29526696A patent/JP3454647B2/en not_active Expired - Fee Related
-
1997
- 1997-09-12 TW TW087208371U patent/TW360387U/en unknown
- 1997-11-05 CN CNB971202125A patent/CN1155781C/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103620336A (en) * | 2011-07-05 | 2014-03-05 | 夏普株式会社 | Heat exchanger and air conditioner equipped with same |
| CN104456721A (en) * | 2013-09-13 | 2015-03-25 | 三菱电机株式会社 | Refrigeration cycle device |
| CN104456721B (en) * | 2013-09-13 | 2017-06-13 | 三菱电机株式会社 | Refrigerating circulatory device |
| CN108351138A (en) * | 2015-11-12 | 2018-07-31 | 三菱电机株式会社 | Air-conditioning |
| US10627127B2 (en) | 2015-11-12 | 2020-04-21 | Mitsubishi Electric Corporation | Air conditioner in which a flammable refrigerant flows |
| CN108351138B (en) * | 2015-11-12 | 2020-07-07 | 三菱电机株式会社 | Air conditioner |
| CN108885038A (en) * | 2016-03-28 | 2018-11-23 | 三菱电机株式会社 | Outdoor unit |
| US11105521B2 (en) | 2016-03-28 | 2021-08-31 | Mitsubishi Electric Corporation | Outdoor unit |
| CN114777216A (en) * | 2016-03-28 | 2022-07-22 | 三菱电机株式会社 | Outdoor machine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1155781C (en) | 2004-06-30 |
| TW360387U (en) | 1999-06-01 |
| JP3454647B2 (en) | 2003-10-06 |
| JPH10141804A (en) | 1998-05-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1155781C (en) | Air conditioner | |
| JP6065429B2 (en) | Air conditioner | |
| WO2019124361A1 (en) | Refrigeration cycle device | |
| JPWO2019124361A1 (en) | Refrigeration cycle equipment | |
| AU2007232820B2 (en) | Flareless pipe coupling structure, flareless pipe coupling method, and on-site pipe coupling method | |
| CN1166907C (en) | Air conditioners using inflammable refrigerant | |
| CN1990132A (en) | Method of making sleeve tube | |
| KR20070086837A (en) | Heat transfer tube with inner surface grooves, used for high-pressure refrigerant | |
| KR20040036874A (en) | Refrigerating cycle device | |
| US20230038644A1 (en) | Air conditioning process | |
| JP2008069993A (en) | Heat exchanger and heat pump water heater using the same | |
| WO2009150763A1 (en) | Air-conditioning device | |
| JP3783208B2 (en) | Air conditioner piping structure | |
| JP4826343B2 (en) | Heat transfer tube for refrigerant of heat pump type heat exchange device and gas cooler using the same | |
| JP6565277B2 (en) | Refrigeration equipment | |
| JP4855305B2 (en) | Air conditioner | |
| CN103542565A (en) | Room air conditioner | |
| CN215675501U (en) | High-pressure pipe | |
| KR100558819B1 (en) | A return-bend connecting method of a heat exchanger | |
| JP2005077062A (en) | Heat pump water heater | |
| KR100867314B1 (en) | Heat exchanger for CO2 cooling & heating system | |
| JP2003148755A (en) | Air conditioner | |
| JP2010078256A (en) | Fin tube type heat exchanger, and refrigerating cycle device and air conditioner using the same | |
| JP3309778B2 (en) | Air conditioner | |
| JP4967256B2 (en) | Refrigeration cycle system and working fluid suitable for the refrigeration cycle system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20040630 Termination date: 20151105 |
|
| EXPY | Termination of patent right or utility model |