CN100381769C - Refrigerating apparatus - Google Patents
Refrigerating apparatus Download PDFInfo
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- CN100381769C CN100381769C CNB2004800057502A CN200480005750A CN100381769C CN 100381769 C CN100381769 C CN 100381769C CN B2004800057502 A CNB2004800057502 A CN B2004800057502A CN 200480005750 A CN200480005750 A CN 200480005750A CN 100381769 C CN100381769 C CN 100381769C
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Abstract
A refrigerating apparatus, wherein the capacity of a compressor (21) is set based on a Froude number Fr during the washing operation. The Froude number represents the ratio of the inertia force of a gas refrigerant flowing in a gas side communication tube (70) to a gravity acting on a fluid in the gas side communication tube (70). During the washing operation, the capacity of the compressor (21) is set so that the Froude number Fr is equal to or larger than 1, and the inertia force of the gas refrigerant flowing in the gas side communication tube (70) becomes larger than the gravity acting on the fluid containing mineral oils and foreign matters in the gas side communication tube (70). Accordingly, the fluid containing the mineral oils and foreign matters is pushed up by the gas refrigerant also at the vertical portion of the gas side communication tube (70). Thus, the mineral oils and foreign matters remaining in an existing fluid side communication tube (60) and the gas side communication tube (70) can be collected.
Description
Technical field
The present invention relates to a kind of being connected on the connecting pipe of both having established, connecting pipe is carried out the refrigerating plant of cleaning.
Background technology
Up to now, have refrigerating plant by the refrigerant loop of cold-producing medium circulation carrying out steam compression type refrigerating circulation, well-known.Described refrigerating plant is made of the indoor and outdoor unit, and these indoor and outdoor units are connected to each other by connecting pipe.This connecting pipe, great majority are embedded in interior of building.Therefore, be difficult to change connecting pipe when upgrading refrigerating plant, continue to utilize the connecting pipe of both having established, introduce new refrigerating plant.
Because environment is produced bad influence such as damage the ozone layer, so as the cold-producing medium that is filled in the described refrigerant loop, used up to now CFC cold-producing medium and HCFC cold-producing medium have been stopped using comprehensively.Therefore, when upgrading refrigerating plant, need be the refrigerating plant of HFC cold-producing medium etc. with having used new refrigerant, be connected on the connecting pipe of both having established of having used CFC cold-producing medium, HCFC cold-producing medium.But, in the connecting pipe of both having established, also exist the CFC cold-producing medium, the HCFC cold-producing medium is a mineral oil with refrigerator oil.Owing to CFC cold-producing medium or HCFC cold-producing medium and mineral oil worsen acid and the ion that produces, might cause the corrosion of expansion valve etc.Therefore, before introducing new refrigerating plant, carrying out test running, need to clean the connecting pipe of both having established, remove mineral oil.
So the refrigerating plant (for example, with reference to patent documentation 1) that can carry out the cleaning of the connecting pipe of both having established is crossed in motion.In this refrigerating plant, having the heat source machine of compressor, heat source side heat exchanger and having the indoor set that utilizes the side heat exchanger is that first and second connecting pipes couple together by the connecting pipe of both having established, and has constituted refrigerant loop.In air entry one side of compressor, be provided with for the foreign matter of from cold-producing medium, isolating and reclaim mineral oil and foreign matter and catch mechanism.In described refrigerating plant, fill the HFC cold-producing medium after, carry out cleaning with refrigeration mode, clean first and second connecting pipes by the cold-producing medium that in refrigerant loop, circulates, mineral oil and foreign matter are recovered in foreign matter catch in the mechanism.
" patent documentation 1 " Japanese publication communique spy opens the 2000-329432 communique.
At this, for example about a kind of air conditioner of refrigerator, the situation that the installation position of outdoor unit and indoor units is equipped with difference of height is also a lot.In this case, use so that extend along vertical direction with regard to some in the connecting pipe that off-premises station group and indoor units couple together.
In order to remove mineral oil and the foreign matter in the connecting pipe that remains in gaseous state one side, need be by the mobile mineral oil and the foreign matter of washing away of gas refrigerant.Particularly, the part of vertically extending in the connecting pipe of gaseous state one side also has the situation that must utilize gas refrigerant mineral oil and foreign matter to be pushed to the top.
Yet, in existing refrigerating plant, do not consider the operating condition in the cleaning.Therefore, such worry is arranged also, in the operating condition that has, the gas refrigerant flow velocity in the connecting pipe of gaseous state one side is too low, is the state that can not wash away mineral oil and foreign matter, and mineral oil and foreign matter remain in the connecting pipe, become the reason of trouble.
Summary of the invention
The present invention researchs and develops out for addressing this problem just.Its purpose is: the connecting pipe of both having established is being carried out in the refrigerating plant of cleaning, positively reducing the mineral oil in the connecting pipe and the residual volume of foreign matter, preventing trouble before it happens.
The technical scheme that the present invention takes is described.
First and second technical schemes, with following refrigerating plant is object: be provided with compressor 21, heat source side heat exchanger 24, have liquid side tube connector 60, gaseous state side tube connector 70 and the heat source side loop 11 that utilizes side heat exchanger 33 to be connected, drive described compressor 21 and carry out from described liquid side tube connector of both having established 60 and gaseous state side tube connector 70, removing of the cleaning of old system cryogen with refrigerator oil by both having established.
First technical scheme, according to the operating condition in the described cleaning of the following setting of Froude number Fr: in the speed of establishing the gas refrigerant that flows through described gaseous state side tube connector 70 is U, if the internal diameter of this gaseous state side tube connector 70 is D, the density of establishing the gas refrigerant that flows through this gaseous state side tube connector 70 is d
g, establishing the fluid density that is present in this gaseous state side tube connector 70 is d
1, when establishing acceleration of gravity and being g, make and utilize formula Fr=(d
g/ d
1) * (U
2/ Froude number the Fr that gD) represents becomes more than 1.5 below 2.
Second technical scheme, the gaseous state side tube connector 70 that is connected with the heat source side loop 11 of described refrigerating plant a plurality ofly utilizes pairing that in the side heat exchanger to utilize a plurality of arms 71 on the side heat exchanger to constitute with the person in charge 72 that these a plurality of arms 71 are connected thereon by being connected to, according to the operating condition in the described cleaning of the following setting of Froude number Fr: the speed at the gas refrigerant of establishing the person in charge 72 of flowing through described gaseous state side tube connector 70 is U, if this person in charge's 72 internal diameter is D, the density of establishing the gas refrigerant that flows through this person in charge 72 is d
g, establishing the fluid density that is present among this person in charge 72 is d
1, when establishing acceleration of gravity and being g, make and utilize formula Fr=(d
g/ d
1) * (U
2/ Froude number the Fr that gD) represents becomes more than 1.5 below 2.
Third and fourth technical scheme, with following refrigerating plant is object: be provided with compressor 21, heat source side heat exchanger 24, has liquid side tube connector 60 by both having established, gaseous state side tube connector 70 is connected heat source side loop 11 that utilizes on the side heat exchanger 33 and air entry one side that is located at the compressor 21 in the described heat source side loop 11, the returnable 40 of storage isolated refrigerator oil from gas refrigerant is driven described compressor 21 and is carried out being recovered to cleaning in the described returnable 40 with remaining in described liquid tube connector of both having established 60 and old system cryogen in the gaseous state tube connector 70 with refrigerator oil.
The 3rd technical scheme, according to the operating condition in the described cleaning of the following setting of Froude number Fr: in the speed of establishing the gas refrigerant that flows through described gaseous state side tube connector 70 is U, if the internal diameter of this gaseous state side tube connector 70 is D, the density of establishing the gas refrigerant that flows through this gaseous state side tube connector 70 is d
g, establishing the fluid density that is present in this gaseous state side tube connector 70 is d
1, when establishing acceleration of gravity and being g, make and utilize formula Fr=(d
g/ d
1) * (U
2/ Froude number the Fr that gD) represents becomes more than 1.5 below 2.
The 4th technical scheme, the gaseous state side tube connector 70 that is connected with the heat source side loop 11 of described refrigerating plant a plurality ofly utilizes pairing that in the side heat exchanger to utilize a plurality of arms 71 on the side heat exchanger to constitute with the person in charge 72 that these a plurality of arms 71 are connected thereon by being connected to, according to the operating condition in the described cleaning of the following setting of Froude number Fr: the speed at the gas refrigerant of establishing the person in charge 72 of flowing through described gaseous state side tube connector 70 is U, if this person in charge's 72 internal diameter is D, the density of establishing the gas refrigerant that flows through this person in charge 72 is d
g, establishing the fluid density that is present among this person in charge 70 is d
1, when establishing acceleration of gravity and being g, make and utilize formula Fr=(d
g/ d
1) * (U
2/ Froude number the Fr that gD) represents becomes more than 1.5 below 2.
The 5th technical scheme, in the first, second, third or the 4th technical scheme, the cold-producing medium that is filled in the heat source side loop 11 is the mix refrigerant that contains R32, or natural refrigerant.
-effect-
In described first and second technical schemes, heat source side loop 11 is connected by the liquid side tube connector 60 both established and gaseous state side tube connector 70 and utilizes on the side heat exchanger 33.In the cleaning of cleaning the liquid side tube connector 60 both established and gaseous state side tube connector 70, the compressor 21 in heat source side loop 11 is starting, and cold-producing medium flows through liquid side tube connector 60 and gaseous state side tube connector 70.In cleaning, remain in the liquid side tube connector 60 both established and old system cryogen refrigerator oil in the gaseous state side tube connector 70, cooled dose washes away, and removes from liquid side tube connector 60 and gaseous state side tube connector 70.
In described third and fourth technical scheme, heat source side loop 11 is connected by the liquid side tube connector 60 both established and gaseous state side tube connector 70 and utilizes on the side heat exchanger 33.In the cleaning of cleaning the liquid side tube connector 60 both established and gaseous state side tube connector 70, the compressor 21 in heat source side loop 11 is starting, and cold-producing medium flows through liquid side tube connector 60 and gaseous state side tube connector 70.In cleaning, remain in the liquid side tube connector 60 both established and old system cryogen refrigerator oil in the gaseous state side tube connector 70, flow in the heat source side loop 11, from gas refrigerant, separate and be recycled in the returnable 40.
In the described first and the 3rd technical scheme, Froude number Fr show gravity on the liquid of inertia force relativity in gaseous state side tube connector 70 of the gas refrigerant flow through gaseous state side tube connector 70 ratio.In other words, Froude number Fr shows the gravity on the liquid act in the gaseous state side tube connector 70 and flows through the magnitude relationship of inertia force of the gas refrigerant of gaseous state side tube connector 70.So, in these technical schemes, set operating condition in the cleaning according to this Froude number Fr.
In the described second and the 4th technical scheme, gaseous state side tube connector 70 is made of a plurality of arms 71 and 1 person in charge 72.A plurality of arms 71, an end separately are connected to and a plurality ofly utilize pairing that in the side heat exchanger 33 to utilize on the side heat exchanger 33, and the other end separately is connected to be responsible on 72.Froude number Fr in this technical scheme shows the ratio of the gravity on the person in charge's 72 of flowing through gaseous state side tube connector 70 the liquid of inertia force relativity in this person in charge 72 of gas refrigerant.In other words, Froude number Fr shows the gravity on the liquid in the person in charge 72 act on gaseous state side tube connector 70 and flows through the magnitude relationship of inertia force of this person in charge's 72 gas refrigerant.So, in these technical schemes, set operating condition in the cleaning according to this Froude number Fr.
At this, might be present in the liquid in the gaseous state side tube connector 70, can be listed below: old system cryogen is with refrigerator oil, new refrigerant and new refrigerant refrigerator oil.The fluid density d that preferably uses old system cryogen to use when drawing Froude number Fr with the value of density maximum in the refrigerator oil with refrigerator oil, new refrigerant and new refrigerant
1Value.The d of She Dinging like this
1Value, necessarily big with the density of the mixture of refrigerator oil with refrigerator oil, new refrigerant and new refrigerant than old system cryogen, the liquid in the gaseous state side tube connector 70 are positively washed away by gas refrigerant.
In described technical scheme, the operating condition of setting in the cleaning makes Froude number Fr more than or equal to 1.5.As mentioned above, Froude number Fr shows the ratio of the gravity on the liquid of inertia force relativity in gaseous state side tube connector 70 of the gas refrigerant flow through gaseous state side tube connector 70.Therefore, under the setting operating condition made that Froude number Fr is more than or equal to 1.5 state, the inertia force that flows through the gas refrigerant of gaseous state side tube connector 70 was more than 1.5 times or 1.5 times of gravity on the liquid that acts in the gaseous state side tube connector 70.
In the 5th technical scheme, being filled in the heat source side loop 11 for the mix refrigerant or the natural refrigerant of one of its composition with R32.For example, the mix refrigerant that contains R32 is HFC mix refrigerants such as R410A, R407C; For example, natural refrigerant is carbon dioxide (CO
2), ammonia (NH
3) and propane (C
3H
8) wait hydrocarbon.
The effect of-invention-
In the present invention, set operating condition in the cleaning according to Froude number Fr.Specifically, in the described first and the 3rd technical scheme, consider the Froude number Fr of relation of the inertia force of the gas refrigerant that shows the gravity on the liquid act in the gaseous state side tube connector 70 and flow through gaseous state side tube connector 70, set the operating condition in the cleaning.In the described second and the 4th technical scheme, consider the gravity on the liquid that shows in the person in charge 72 act on gaseous state side tube connector 70 and flow through the Froude number Fr of relation of this person in charge's 72 gas refrigerant, set the operating condition in the cleaning.
At this, because dissolving each other with refrigerator oil, old system cryogen and old system cryogen flow through liquid side tube connector 60, foreign matter is washed away by old system cryogen of liquid phase, so old system cryogen that remains in this liquid state side tube connector 60 is considerably less with refrigerator oil, foreign matter amount.Flow through the liquid refrigerant of liquid side tube connector 60, to compare proportion bigger with the gas refrigerant that flows through gaseous state side tube connector 70, and the inertia force of liquid refrigerant is compared bigger with the inertia force of gas refrigerant.So, in cleaning,, then can wash away old system cryogen refrigerator oil and the foreign matter that remain in the liquid side tube connector 60 if can wash away old system cryogen refrigerator oil and the foreign matter that remains in the gaseous state side tube connector 70.
Therefore, the first and the 3rd technical scheme is such as described, if set operating condition, just can positively wash away old system cryogen refrigerator oil and the foreign matter that remains in liquid side tube connector 60 and the gaseous state side tube connector 70 with cold-producing medium according to Froude number Fr to the liquids and gases cold-producing medium in the gaseous state side tube connector 70; The second and the 4th technical scheme is such as described, if set operating condition according to Froude number Fr to the liquids and gases cold-producing medium in the person in charge 72 of gaseous state side tube connector 70, just can with cold-producing medium positively wash away remain in liquid side tube connector 60 and by be responsible for 72, old system cryogen in the gaseous state side tube connector 70 that arm 71 constitutes is with refrigerator oil and foreign matter.
Thereby, according to the present invention, can be by cleaning, positively reduce old system cryogen in the connecting pipe of both having established with the residual volume of refrigerator oil and foreign matter, can prevent resulting from the trouble of old system cryogen with refrigerator oil and foreign matter.
In described technical scheme, the operating condition of setting in the cleaning makes Froude number Fr more than or equal to 1.5.Under this state, the inertia force that flows through the gas refrigerant of gaseous state side tube connector 70 is more than 1.5 times or 1.5 times of gravity on the liquid that acts in the gaseous state side tube connector 70, the part of vertically extending in gaseous state side tube connector 70, the effect of pushing old system cryogen to top with refrigerator oil and foreign matter with gas refrigerant also increases.So,, can more positively reduce old system cryogen in the connecting pipe of both having established with the residual volume of refrigerator oil and foreign matter according to this technical scheme.
Description of drawings
Fig. 1 is the refrigerant loop figure of the related air conditioner of example 1.
Fig. 2 is the figure that shows the relation of Froude number Fr and residual volume ratio.
Fig. 3 is the refrigerant loop figure of the related air conditioner of example 2.
Symbol description
11-heat source side loop (outdoor loop); The 21-compressor; 24-heat source side heat exchanger (outdoor heat converter); 33-utilizes side heat exchanger (indoor heat converter); The 40-returnable; The liquid side tube connector of 60-; 70-gaseous state side tube connector; The 71-arm; 72-is responsible for.
The specific embodiment
Below, describe example of the present invention with reference to the accompanying drawings in detail.
(working of an invention form 1)
As shown in Figure 1, the air conditioner of this example has 1 outdoor unit 20 and 1 indoor units 30.Outdoor unit 20 and indoor units 30 are to be used for the HFC cold-producing medium.Outdoor unit 20 constitutes refrigerating plant involved in the present invention.
The outdoor loop 11 of described outdoor unit 20 constitutes the heat source side loop.Compressor 21, separator 22, four-way change-over valve 23 and heat source side heat exchanger are that outdoor heat converter 24 is connected on this outdoor loop 11 by refrigerant tubing, are filled with the HFC cold-producing medium in this outdoor loop 11.In outdoor unit 20, be provided with outdoor fan 24a.
Remark additionally, for example, be filled in the mix refrigerant of mix refrigerant, R32 and R125 that HFC cold-producing medium in the described outdoor loop 11 is R32, R134a, R404A, R407C, R410A, R507A, R32 and R125 and R134a and contain in the mix refrigerant of R32 with R32 be main component or the like.In described outdoor loop 11, be not limited to the HFC cold-producing medium, also can be filled with non-fluorine is natural refrigerant.For example, this natural refrigerant is CO
2, C
mH
n, NH
3And H
2O etc.
In described outdoor loop 11, outlet one side of compressor 21 is connected with first valve port of four-way change-over valve 23 by separator 22.Second valve port of four-way change-over valve 23 is connected an end of outdoor heat converter 24.The 3rd valve port of four-way change-over valve 23 is connected air entry one side of compressor 21 by returnable 40 described later.The 4th valve port of four-way change-over valve 23 is connected with gaseous state side draught excluder 27.The other end of described outdoor heat converter 24 is connected with liquid side draught excluder 26 by outdoor expansion valve 25.
Described compressor 21 is closed-type scroll compressors.Compressor 21 constitutes so-called high pressure dome type.In other words, in this compressor 21, constitute like this, the gas refrigerant that has compressed in compressing mechanism 21b flows to earlier in the housing 21a, is discharged to outside the housing 21a again.The HFC cold-producing medium is stored in housing 21a bottom with refrigerator oil.For example use artificial oil such as ether oil and ester oil as this refrigerator oil.
Described compressor 21, it is variable establishing its capacity.Supply with the motor 21c power of compressor 21 by the converter that does not show.If the output frequency of change converter, the rotary speed of motor 21c just changes, and the capacity of compressor 21 just changes.
Make described refrigerant loop 10 be such structure, switch the running of refrigeration mode and the running of heating mode by the switching of four-way change-over valve 23.Specifically, the state that if first valve port and second valve port that switch to described four-way change-over valve 23 interconnect, the 3rd valve port and the 4th valve port interconnect (among Fig. 1 with the state shown in the solid line), then cold-producing medium is in refrigerant loop 10, become the running that condenser, indoor heat converter 33 become the refrigeration mode of evaporimeter by outdoor heat converter 24, circulation; The state (state among Fig. 1 shown in the with dashed lines) that if first valve port and the 4th valve port that switch to described four-way change-over valve 23 interconnect, second valve port and the 3rd valve port interconnect, then cold-producing medium is in refrigerant loop 10, become the running that evaporimeter, indoor heat converter 33 become the heating mode of condenser by outdoor heat converter 24, circulation.
In described outdoor loop 11, be provided with and reclaim that to remain in liquid side tube connector 60 and old system cryogen in the gaseous state side tube connector 70 both established be the returnable 40 of mineral wet goods foreign matter with refrigerator oil.This returnable 40 forms air-tight state, is connected on inflow pipe 41 and the effuser 42.Inflow pipe 41 is connected with the 3rd valve port of four-way change-over valve 23; Effuser is connected with air entry one side of compressor 21.
Be formed with described inflow pipe 41, make its port of export be positioned at the bottom of returnable 40, mouth is opened towards the bottom of returnable 40.In inflow pipe 41, be provided with and flow into valve 51.Be formed with described effuser 42, make its arrival end be positioned at the top of returnable 40, mouth is opened towards the bottom of returnable 40.In effuser 42, be provided with and flow out valve 52.Remark additionally, described inflow valve 51 and outflow valve 52 constitute switch valves.
In described outdoor loop 11, be provided with the shunt valve 54 that is used for returnable 40 bypasses.Shunt valve 54, one end are connected between the 3rd valve port that flows into valve 51 and four-way change-over valve 23; Its other end is connected between air entry one side that flows out valve 52 and compressor 21.Being provided with switch valve in shunt valve 54 is bypass valve 53.
The end of oil return pipe 22a is connected on the described separator 22.The other end of oil return pipe 22a is connected between air entry one side that flows out valve 52 and compressor 21, and the coupling part of relative shunt valve 54 is positioned at the place of downstream one side.Be mixed in the artificial oil of discharging the gas refrigerant for 21 li from compressor, after separating from gas refrigerant by separator 22, again by this oil return pipe 22a, air entry one side of getting back to compressor 21.
In the indoor loop 12 of described indoor units 30, indoor expansion valve 32 is indoor heat converter 33 series connection with utilizing the side heat exchanger.In indoor units 30, be provided with indoor fan 33a.
Described liquid side tube connector 60, the one end is connected with outdoor loop 11 by liquid side draught excluder 26.The other end of liquid side tube connector 60 is connected with indoor loop 12 in the indoor units 30 by liquid side fastening means 31.Described gaseous state side tube connector 70, the one end is connected with outdoor loop 11 by gaseous state side draught excluder 27.The other end of gaseous state side tube connector 70 is connected with indoor loop in the indoor units 30 by gaseous state side fastening means 34.
In the air conditioner of this example, set the capacity of the compressor 21 in the cleaning according to the Froude number Fr that represents with following formula.
Fr=(d
g/ d
1) * (U
2/ gD) (formula 1)
In above-mentioned formula, Froude number Fr is the dimensionless number that shows the ratio of the gravity on the liquid of inertia force relativity in gaseous state side tube connector 70 of the gas refrigerant flow through gaseous state side tube connector 70.In this formula, U is the speed that flows through the gas refrigerant of gaseous state side tube connector 70, and its unit is (m/s); D is the internal diameter of gaseous state side tube connector 70, and its unit is (m); d
gBe the density that flows through the gas refrigerant of gaseous state side tube connector 70, its unit is (kg/m
3); d
1Be the density of liquid in being present in gaseous state side tube connector 70, its unit is (kg/m
3); G is an acceleration of gravity, and its unit is (m/s
2).
At this, in carrying out the gaseous state side tube connector 70 of cleaning, mineral oil (old system cryogen refrigerator oil), new refrigerant, artificial oil (new refrigerant refrigerator oil) and solid shape or aqueous foreign matter mix.Remark additionally various acid and the ion that solid shape or aqueous foreign matter be the wearing and tearing powder that produces of the slip because of compressor 21, produce because of the deterioration of mineral oil and old system cryogen and invade moisture in the pipeline etc.In cleaning, the mixture of mineral oil, new refrigerant, artificial oil and various foreign matters is washed away by gas refrigerant.
But, to be present in each components in proportions in the mixture in the gaseous state side tube connector 70 almost be impossible for prediction or actual measurement.Say that again each components in proportions in this mixture changes momently in cleaning.So, preferably use value maximum in the value that can expect as the fluid density d that is present in the gaseous state side tube connector 70
1
Can specifically enumerate, the liquid that might be present in the gaseous state side tube connector 70 is mineral oil, new refrigerant and artificial oil.Consider the amount of foreign matters such as abrasion powder etc. and few, the fluid density d that the value of preferably using the liquid of density maximum in mineral oil, new refrigerant and the artificial oil is used when drawing Froude number Fr
1Value.Such as, using under the situation of R410A as new refrigerant the density maximum of aqueous R410A in these 3 kinds of liquid.Therefore, preferably use the density conduct fluid density d in this case of aqueous R410A
1Value.
Also can be such, in cleaning,, set Froude number Fr according to being located at the outdoor expansion valve 32 in the refrigerant loop 10, the aperture of indoor expansion valve 25 and the air quantity of outdoor fan 24a, indoor fan 33a.The aperture of expansion valve 25,32 and fan 24a, setting value one decision of the air quantity of 33a, the circulating mass of refrigerant in the refrigerant loop 10 has just determined that the speed that flows through the gas refrigerant of gaseous state side tube connector 70 has also just determined.
The switching method of-indoor, outdoor unit-
Having used old system cryogen is the renewal of the air conditioner of CFC cold-producing medium or HCFC cold-producing medium, continue to use liquid side tube connector 60 and the gaseous state side tube connector 70 both established, to change newly-installed new refrigerant into be the HFC cold-producing medium with outdoor unit 20, indoor units 30 the outdoor unit of both having established and indoor units.
Specifically, at first from air conditioner, reclaim CFC cold-producing medium or HCFC cold-producing medium.Afterwards, on the liquid side tube connector 60 both established and the gaseous state side tube connector 70 with the CFC cold-producing medium with or the HCFC cold-producing medium remove with outdoor unit, indoor units.Afterwards,, the HFC cold-producing medium is connected on the liquid side tube connector of both having established 60 and gaseous state side tube connector 70 with outdoor unit 20, indoor units 30, constitutes described refrigerant loop 10 by fastening means 31,34 and draught excluder 26,27.
Then, close under the state of valve 27 closing liquid side draught excluder 26 and gaseous state side seal, indoor units 30, liquid side tube connector 60 and gaseous state side tube connector 70 are vacuumized, remove air in the refrigerant loop 10 beyond the outdoor unit 20 and moisture etc.Afterwards, open liquid side draught excluder 26 and gaseous state side seal and close valve 27, in refrigerant loop 10, append and fill the HFC cold-producing medium.
-cleaning-
Below, the cleaning of described air conditioner is described.This cleaning is to carry out for removing the mineral wet goods foreign matters that remain in the liquid side tube connector 60 both established and the gaseous state side tube connector 70, the HFC cold-producing medium just has been installed has been carried out afterwards with indoor units 30, outdoor unit 20.
After installing HFC cold-producing medium indoor units 30, outdoor unit 20, start compressor 21, four-way change-over valve 23 is switched to the state of representing with solid line among Fig. 1.Open and flow into valve 51 and outflow valve 52, close bypass valve 53.Remark additionally, in cleaning, suitably adjust the aperture of outdoor expansion valve 25, indoor expansion valve 32.
One drive compression machine 21, the gas refrigerant that has compressed just ejects from compressor 21.The gas refrigerant that ejects flows in the four-way change-over valve 23 by centrifugal oil separator 22.Passed through the gas refrigerant of four-way change-over valve 23, flow in the outdoor heat converter 24, condensed with the outdoor air heat exchange again.Afterwards, liquid refrigerant flows in the liquid side tube connector 60 through liquid side draught excluder 26 by outdoor expansion valve 25 again.
Old system cryogen is that mineral oil and foreign matter remain in the liquid side tube connector 60 with refrigerator oil.This mineral oil and foreign matter are flowed into the liquid refrigerant that comes in the liquid side tube connector 60 and are washed away.Then, liquid refrigerant and the mixtures of liquids that contains mineral oil, foreign matter are in indoor expansion valve 32 inflow indoor heat exchangers 33.In indoor heat converter 33, liquid refrigerant and room air heat exchange and evaporate.Vaporized cold-producing medium flows in the gaseous state side tube connector 70 together with the liquid that contains mineral oil, foreign matter.
Old system cryogen is that mineral oil and foreign matter remain in the gaseous state side tube connector 70 with refrigerator oil.This mineral oil and foreign matter are followed the liquid that contains mineral oil, foreign matter that flows out in the liquid side tube connector 60 and are washed away by gas refrigerant together.Then, gas refrigerant and the mixtures of liquids that contains mineral oil, foreign matter through gaseous state side draught excluder 27 and four-way change-over valve 23, flow in the returnable 40 from inflow pipe 41 again.
Flowed into gas refrigerant and the mixtures of liquids that contains mineral oil, foreign matter in the returnable 40, discharged towards the bottom of this returnable 40.Wherein contain the bottom of the fluid storage of mineral oil, foreign matter in returnable 40.Gas refrigerant is discharged to the refrigerant loop 10 from 40 li of returnable by effuser 42, again from the air entry one side inflow compressor 21 of compressor 21.
Described cleaning was carried out after the stipulated time, remained in the liquid side tube connector 60 both established and the liquid that contains mineral oil and foreign matter in the gaseous state side tube connector 70, was recycled to together in the returnable 40 with the gas refrigerant that flows through refrigerant loop 10.Thus, old system cryogen is that mineral oil and foreign matter are removed from liquid side tube connector 60 and gaseous state side tube connector 70 with refrigerator oil.
After cleaning finishes, close and flow into valve 51 and outflow valve 52, open bypass valve 53.Afterwards, flow into valve 51 and flow out valve 52 and close always, bypass valve 53 is opened always.Under this state, it is the running of refrigeration mode, the running of heating mode that switching is turned round usually.
-refrigeration mode, heating mode-
In the running of refrigeration mode, four-way change-over valve 23 becomes the state of representing with solid line among Fig. 1.The cold-producing medium of discharging from compressor 21 flows into 22 li of separators, by behind the four-way change-over valve 23, condenses with the outdoor air heat exchange in outdoor heat converter 24 again.Curdy cold-producing medium, by outdoor expansion valve 25, flow through liquid side tube connector 60 again after, in indoor heat converter 33, evaporate with the room air heat exchange.Vaporized cold-producing medium flows through gaseous state side tube connector 70, flow through four-way change-over valve 23 and shunt valve 54 again after, air entry one side of getting back to compressor 21.
In the running of heating mode, four-way change-over valve 23 becomes the state that dots among Fig. 1.The cold-producing medium of discharging from compressor 21 flows into 22 li of separators, by behind four-way change-over valve 23 and the gaseous state side tube connector 70, condenses with the room air heat exchange in indoor heat converter 33 again.Curdy cold-producing medium flows through liquid side tube connector 60, by behind the outdoor expansion valve 25, evaporates with the outdoor air heat exchange in outdoor heat converter 24 again.Vaporized cold-producing medium behind four-way change-over valve 23 and shunt valve 54, is got back to air entry one side of compressor 21.
Operating condition in the-cleaning-
As mentioned above, in the cleaning of described air conditioner, wash away by the cold-producing medium that flows through refrigerant loop 10 and to remain in the liquid side tube connector 60 both established and the liquid that contains mineral oil and foreign matter in the gaseous state side tube connector 70, be recovered in the returnable 40.Remark additionally, in cleaning, the cold-producing medium that also can flow through gaseous state side tube connector 70 only is the dried running of gas phase; The cold-producing medium that also can flow through gaseous state side tube connector 70 is the wet running of gas phase and liquid phase.
At this, in described air conditioner, also there is outdoor unit 20 to be installed in the situation of the top of indoor units 30.In this case, along vertical direction liquid side tube connector 60 and gaseous state side tube connector 70 are set.If carry out cleaning with the described air conditioner that is provided with like this, towards current downflow, gas refrigerant flows in gaseous state side tube connector 70 liquid refrigerant up in liquid side tube connector 60.
The air conditioner of this example, the capacity of setting the compressor 21 in the cleaning makes Froude number Fr greater than 1.Under this state, to compare with acting on the gravity that remains in the gaseous state side tube connector 70, contains on the liquid of mineral oil and foreign matter, the inertia force of gas refrigerant that flows through gaseous state side tube connector 70 is bigger.In other words, the part of extending along vertical direction in gaseous state side tube connector 70 acts on making a concerted effort up on the liquid that contains mineral oil and foreign matter.Therefore, the part of in gaseous state side tube connector 70, extending along vertical direction, the liquid that contains mineral oil and foreign matter is also pushed to the top by gas refrigerant.Like this, the liquid that remain in the gaseous state side tube connector of both having established 70, contains mineral oil and foreign matter is just removed from the gaseous state side tube connector of both having established 70 by cleaning.The liquid of having removed from the gaseous state side tube connector of both having established 70, contain mineral oil and foreign matter positively is recovered in the returnable 40.
At this, because old system cryogen and old system cryogen are that mineral oil is dissolving each other and flows through liquid side tube connector 60 with refrigerator oil, foreign matter is washed away by old system cryogen of liquid phase, so the mineral oil, the foreign matter amount that remain in this liquid state side tube connector 60 are considerably less.In carrying out the liquid side tube connector 60 of cleaning, liquid refrigerant is towards current downflow.Therefore, mineral oil and the foreign matter that remains in the liquid side tube connector 60 pushed to the below by liquid refrigerant.So, consider the Froude number Fr in the gaseous state side tube connector 70, then can from liquid side tube connector 60, also positively remove mineral oil and foreign matter.
In the air conditioner of this example, the capacity of setting the compressor 21 in the cleaning makes the Froude number Fr of gaseous state side tube connector 70 greater than 1.With reference to Fig. 2 its reason is described.
In Fig. 2, transverse axis shows the Froude number Fr with (formula 1) expression, and the longitudinal axis shows the residual volume ratio.The ratio of residual volume, be to be under the situation of a reference value, carried out remaining in after the cleaning in 1 to 3 hours the mineral oil in liquid side tube connector 60 and the gaseous state side tube connector 70, the ratio of relative this a reference value of foreign matter amount to remain in the mineral oil in liquid side tube connector 60 and the gaseous state side tube connector 70 and the tolerance of foreign matter.
As shown in Figure 2, greater than 1 zone, Froude number Fr is big more at Froude number Fr, and residual volume is than just more little.This is because along with the increase of Froude number Fr, and the inertia force of gas refrigerant and the difference that acts on the gravity on the liquid that contains mineral oil, foreign matter enlarge, the power that contains the gas refrigerant that the liquid of mineral oil, foreign matter is subjected to increase so.If Froude number Fr is increased to more than 1.4 or 1.4, then residual volume is bigger than the slope of relative Froude number Fr; If Froude number Fr becomes more than 1.5 or 1.5, the residual volume ratio is just smaller or equal to 1; If Froude number Fr becomes 1.6, residual volume becomes about 0.3 than just; If Froude number Fr becomes more than 1.6 or 1.6, residual volume is than just reducing very lentamente.
Like this, greater than 1 and less than 1.5 zone, about 1 to 3 hours residual volumes after the cleaning have been carried out than greater than 1 at Froude number Fr.In other words, more residual down in liquid side tube connector 60 and the gaseous state side tube connector 70 after the cleaning than more mineral oil of tolerance and foreign matter.Yet, if carry out longer cleaning of time, just can make residual volume than less than 1, make to remain in liquid side tube connector 60 and compare still less with tolerance with mineral oil, foreign matter amount in the gaseous state side tube connector 70.
So in cleaning, the capacity of setting compressor 21 makes Froude number Fr greater than 1.Say that the capacity of more preferably setting compressor 21 makes Froude number Fr more than or equal to 1.5; The best is to make that Froude number Fr is about 1.6.
Remark additionally, in described cleaning, set the capacity of compressor 21, make Froude number Fr on be limited to 120.Under the capacity of setting compressor 21 makes that Froude number Fr is more than or equal to 1.5 state, even under the different situation of operating conditions such as air conditions outside, also can be by carrying out cleaning in about 1 to 3 hours, make residual volume than less than 1, can finish the liquid side tube connector 60 both established and the cleaning of gaseous state side tube connector 70.
At this, established the capacity of the compressor 21 in the cleaning in advance in the design phase of air conditioner, so that in the condition that can estimate under the strictest condition, Froude number Fr is also greater than 1.The strictest condition is, in the condition that can estimate, and the gas refrigerant density d in the gaseous state side tube connector 70
gFluid density d in minimum and the gaseous state side tube connector 70
1Maximum operating condition.Use might be present in the value of the liquid component of density maximum in the liquid component in the gaseous state side tube connector 70 as fluid density d
1Value.The d of She Dinging like this
1Value, certain bigger than actually existing in the interior density of liquid of gaseous state side tube connector 70.Therefore, if in cleaning, start compressor 21 with the capacity of setting as described above, the Froude number Fr in the gaseous state side tube connector 70 just positively surpasses 1, and the liquid in the gaseous state side tube connector 70 is positively washed away by gas refrigerant.
But, gas refrigerant density d
g, density of liquid d
1Value change with temperature and pressure.So, in the air conditioner of this example, consider measured value, the guess value of actual temperature and pressure when carrying out cleaning, the setting value of the capacity of the compressor 21 in the cleaning that revisal is set in advance.
Remark additionally, also can be such, each condition in a plurality of operating conditions is stored compressor 21 capacity that are suitable in the cleaning, from a plurality of setting values of having stored, select to be suitable for the setting value of actual operating condition when carrying out cleaning then.In this case, carry out test under the different operating conditions, determine positively to clean compressor 21 capacity of gaseous state side tube connector 70, this value is stored in the air conditioner by the cleaning down of each operating condition in the design phase of air conditioner.
The effect of-example 1-
In this example, according to compressor 21 capacity in the Froude number Fr setting cleaning.In other words, consider the Froude number Fr of relation of the inertia force of the gas refrigerant that shows the gravity on the liquid act in the gaseous state side tube connector 70 and flow through gaseous state side tube connector 70, set compressor 21 capacity in the cleaning.
At this, because old system cryogen and old system cryogen are that mineral oil is dissolving each other and flows through liquid side tube connector 60 with refrigerator oil, foreign matter is washed away by old system cryogen of liquid phase, so the mineral oil, the foreign matter amount that remain in this liquid state side tube connector 60 are considerably less.Flow through the liquid refrigerant of liquid side tube connector 60, to compare proportion bigger with the gas refrigerant that flows through gaseous state side tube connector 70, and the inertia force of liquid refrigerant is compared bigger with the inertia force of gas refrigerant.So,, then can wash away the mineral oil and the foreign matter that remain in the liquid side tube connector 60 if can wash away mineral oil and the foreign matter that remains in the gaseous state side tube connector 70.
Therefore, behind Froude number Fr setting compressor 21 capacity to the liquid in the gaseous state side tube connector 70, gas refrigerant, just can positively wash away the liquid that contains mineral oil, foreign matter that remains in liquid side tube connector 60 and the gaseous state side tube connector 70 with cold-producing medium, be recovered in the returnable 40.Thereby, according to the present invention, can be by cleaning, positively reduce liquid side tube connector 60 and the mineral oil in the gaseous state side tube connector 70 and the residual volume of both having established of foreign matter, can prevent resulting from the trouble of mineral oil.
In this example, compressor 21 capacity of setting in the cleaning make Froude number Fr greater than 1.In this case, flow through gaseous state side tube connector 70 gas refrigerant inertia force with act on the gravity that remains in the gaseous state side tube connector 70, contains on the liquid of mineral oil and foreign matter and compare bigger, the part of vertically extending in gaseous state side tube connector 70 also can be pushed the top to the liquid that gas refrigerant will contain mineral oil and foreign matter.So,, can further reduce liquid side tube connector 60 and the mineral oil in the gaseous state side tube connector 70 and the residual volume of foreign matter both established according to this example.
If compressor 21 capacity of also setting in the cleaning make Froude number Fr more than or equal to 1.5, the inertia force that flows through the gas refrigerant of gaseous state side tube connector 70 just becomes to act on and remains in the gaseous state side tube connector 70, contains more than 1.5 times or 1.5 times of gravity on the liquid of mineral oil and foreign matter, the part of vertically extending in gaseous state side tube connector 70, the effect that the liquid that will contain mineral oil and foreign matter with gas refrigerant is pushed the top to also increases.So, can spend the scavenging period about 1 to 3 hours positively to reduce liquid side tube connector 60 and the mineral oil in the gaseous state side tube connector 70 and the residual volume of both having established of foreign matter.
The variation of-example 1-
In described example 1, be provided with 1 compressor 21, set compressor 21 capacity by the output frequency of adjusting converter.Be not limited thereto, also multiple compressors 21 can be set, the platform number of the compressor 21 that starts by change is set compressor 21 capacity.
(working of an invention form 2)
Example 2 of the present invention is described.The structure that this example changes the air conditioner of described example 1 constitutes.At this, the place different with described example 1 is described in this example.
The structure that example 2 of the present invention changes the air conditioner of described example 1 constitutes.At this, the place different with described example 1 is described in this example.
The air conditioner of this example has 1 outdoor unit 20 and 3 indoor units 30,30,30.Remark additionally, the platform number of indoor units 30 is only for an example.In each indoor units 30, be provided with indoor loop 12.With liquid side tube connector of both having established 60 and gaseous state side tube connector 70 the outdoor loop 11 of outdoor unit 20 and the indoor loop 12 of each indoor units 30 are coupled together, constituted refrigerant loop 10.
In the indoor loop 12 of described each indoor units 30, indoor expansion valve 32 and indoor heat converter 33 series connection.In each indoor units 30, be provided with indoor fan 33a.
Described liquid side tube connector 60 is responsible for 62 and 3 arms 61,61,61 by 1 and is constituted.The person in charge 62 of liquid side tube connector 60, the one end is connected with outdoor loop 11 by liquid side draught excluder 26.The person in charge 62 of liquid side tube connector 60 has connected 3 arms 61,61,61.The arm 61,61,61 of liquid side tube connector 60, the indoor loop 12 by each indoor units 30 in liquid side fastening means 31 and the indoor units 30 is connected respectively.
Described gaseous state side tube connector 70 is responsible for 72 and 3 arms 71,71,71 by 1 and is constituted.The person in charge 72 of gaseous state side tube connector 70, the one end is connected with outdoor loop 11 by gaseous state side draught excluder 26.The person in charge 72 of gaseous state side tube connector 70 has connected 3 arms 71,71,71.The arm 71,71,71 of gaseous state side tube connector 70, the indoor loop 12 by each indoor units 30 in gaseous state side fastening means 34 and the indoor units 30 is connected respectively.
The same with example 1, in the air conditioner of this example, according to compressor 21 capacity in the Froude number Fr setting cleaning of representing with (formula 1).But, in this example, U, D, d
g, d
1Definition different with described example 1.Specifically, U is the speed of gas refrigerant that flows through the person in charge 72 of gaseous state side tube connector 70, and D is the person in charge's 72 of gaseous state side tube connector 70 a internal diameter; d
gBe the density of gas refrigerant that flows through the person in charge 72 of gaseous state side tube connector 70, d
1It is the fluid density that is present among the person in charge 72 of gaseous state side tube connector 70.
At this, for example be configured on the roof of building at outdoor unit 20, indoor units 30 is configured under the situation in each floor of interior of building, the arm 71,71 of gaseous state side tube connector 70 flatly is set along floor under many circumstances,, 71, this person in charge 72 vertically is set.Under this set state,, also just can from this arm 71,71,71, positively remove mineral oil and foreign matter if consider the person in charge's 72 of gaseous state side tube connector 70 Froude number Fr.
In the air conditioner of this example, compressor 21 capacity of setting in the cleaning make Froude number Fr greater than 1.Under this state, with act on the person in charge 72 who remains in gaseous state side tube connector 70 in, the gravity that contains on the liquid of mineral oil and foreign matter compares, the inertia force of gas refrigerant that flows through this person in charge 72 is bigger.In other words, in the person in charge 72 of gaseous state side tube connector 70, act on making a concerted effort up on the liquid that contains mineral oil and foreign matter.Therefore, in the person in charge 72 of the gaseous state side tube connector 70 that extends along vertical direction, the liquid that contains mineral oil and foreign matter is also pushed to the top by gas refrigerant.Like this, the liquid that remain in the gaseous state side tube connector of both having established 70, contains mineral oil and foreign matter is just removed from the gaseous state side tube connector of both having established 70 by cleaning.The liquid of having removed from the gaseous state side tube connector of both having established 70, contain mineral oil and foreign matter positively is recovered in the returnable 40.
Remark additionally, in described cleaning, the capacity that also can set compressor 21 makes the Froude number Fr of the person in charge 72 of gaseous state side tube connector 70 and arm 71,71,71 all greater than 1.
In this example, consider to show the gravity on the liquid that acts in the gaseous state side tube connector 70 and flow through the Froude number Fr of relation of this person in charge's 72 gas refrigerant, set compressor 21 capacity in the cleaning.
As mentioned above, if can wash away mineral oil and the foreign matter that remains in the gaseous state side tube connector 70, also just can wash away mineral oil and the foreign matter that remains in the liquid side tube connector 60.Therefore, set compressor 21 capacity according to Froude number Fr to the liquids and gases cold-producing medium in the person in charge 72 of gaseous state side tube connector 70, just can positively wash away the person in charge 72 and the arm 71 that remains in liquid side tube connector 60 and gaseous state side tube connector 70 with cold-producing medium, 71, the liquid that contains mineral oil and foreign matter in 71 is recovered in the returnable 40.So, according to this example, be connected with at refrigerating plant under the situation of a plurality of indoor heat converters 33, also can be by cleaning, positively reduce liquid side tube connector 60 and the mineral oil in the gaseous state side tube connector 70 and the residual volume of foreign matter both established, can prevent resulting from the trouble of mineral oil.
-practicality-
In sum, the present invention pair is connected with the connecting pipe of both having established, connecting pipe is carried out scavenger The refrigerating plant of doing, of great use.
Claims (5)
1. refrigerating plant, be provided with compressor (21) and heat source side heat exchanger (24), the liquid side tube connector (60) and the gaseous state side tube connector (70) that have by both having established are connected the heat source side loop (11) that utilizes on the side heat exchanger (33), start described compressor (21), carry out from described liquid side tube connector of both having established (60) and gaseous state side tube connector (70), removing of the cleaning of old system cryogen, it is characterized in that with refrigerator oil:
The following setting of operating condition in the described cleaning: in the speed of establishing the gas refrigerant that flows through described gaseous state side tube connector (70) is U, if the internal diameter of this gaseous state side tube connector (70) is D, the density of establishing the gas refrigerant that flows through this gaseous state side tube connector (70) is d
g, establishing the fluid density that is present in this gaseous state side tube connector (70) is d
1, when establishing acceleration of gravity and being g, make and utilize formula Fr=(d
g/ d
1) * (U
2/ Froude number the Fr that gD) represents becomes more than 1.5 below 2.
2. refrigerating plant, be provided with compressor (21) and heat source side heat exchanger (24), the liquid side tube connector (60) and the gaseous state side tube connector (70) that have by both having established are connected the heat source side loop (11) that utilizes on the side heat exchanger (33), start described compressor (21), carry out from described liquid side tube connector of both having established (60) and gaseous state side tube connector (70), removing of the cleaning of old system cryogen with refrigerator oil, be connected with the gaseous state side tube connector (70) in the heat source side loop (11) of described refrigerating plant, a plurality ofly utilize the pairing person in charge (72) that utilizes a plurality of arms (71) on the side heat exchanger to be connected with these a plurality of arms (71) thereon in the side heat exchanger to constitute by being connected to, it is characterized in that:
The following setting of operating condition in the described cleaning: the speed at the gas refrigerant of establishing the person in charge (72) of flowing through described gaseous state side tube connector (70) is U, and the internal diameter of establishing this person in charge (72) is D, and the density of establishing the gas refrigerant that flows through this person in charge (72) is d
g, establishing the fluid density that is present among this person in charge (72) is d
1, when establishing acceleration of gravity and being g, make and utilize formula Fr=(d
g/ d
1) * (U
2/ Froude number the Fr that gD) represents becomes more than 1.5 below 2.
3. refrigerating plant, be provided with compressor (21) and heat source side heat exchanger (24), the liquid side tube connector (60) and the gaseous state side tube connector (70) that have by both having established are connected the heat source side loop (11) that utilizes on the side heat exchanger (33), with air entry one side that is located at the compressor (21) in the described heat source side loop (11), the returnable (40) of storage isolated refrigerator oil from gas refrigerant, start described compressor (21), carry out remaining in described liquid side tube connector of both having established (60) and old system cryogen in the gaseous state side tube connector (70) and be recovered to cleaning in the described returnable (40), it is characterized in that with refrigerator oil:
The following setting of operating condition in the described cleaning: in the speed of establishing the gas refrigerant that flows through described gaseous state side tube connector (70) is U, if the internal diameter of this gaseous state side tube connector (70) is D, the density of establishing the gas refrigerant that flows through this gaseous state side tube connector (70) is d
g, establishing the fluid density that is present in this gaseous state side tube connector (70) is d
1, when establishing acceleration of gravity and being g, make and utilize formula Fr=(d
g/ d
1) * (U
2/ Froude number the Fr that gD) represents becomes more than 1.5 below 2.
4. refrigerating plant, be provided with compressor (21) and heat source side heat exchanger (24), the liquid side tube connector (60) and the gaseous state side tube connector (70) that have by both having established are connected the heat source side loop (11) that utilizes on the side heat exchanger (33), with air entry one side that is located at the compressor (21) in the described heat source side loop (11), the returnable (40) of storage isolated refrigerator oil from gas refrigerant, start described compressor (21), carry out to remain in described liquid side tube connector of both having established (60) and old system cryogen in the gaseous state side tube connector (70) and be recovered to cleaning in the described returnable (40) with refrigerator oil, be connected with the gaseous state side tube connector (70) in the heat source side loop (11) of described refrigerating plant, a plurality ofly utilize the pairing person in charge (72) that utilizes a plurality of arms (71) on the side heat exchanger to be connected with these a plurality of arms (71) thereon in the side heat exchanger to constitute by being connected to, it is characterized in that:
The following setting of operating condition in the described cleaning: the speed at the gas refrigerant of establishing the person in charge (72) of flowing through described gaseous state side tube connector (70) is U, and the internal diameter of establishing this person in charge (72) is D, and the density of establishing the gas refrigerant that flows through this person in charge (72) is d
g, establishing the fluid density that is present among this person in charge (72) is d
1, when establishing acceleration of gravity and being g, make and utilize formula Fr=(d
g/ d
1) * (U
2/ Froude number the Fr that gD) represents becomes more than 1.5 below 2.
5. according to claim 1,2,3 or 4 described refrigerating plants, it is characterized in that:
The cold-producing medium that is filled in the heat source side loop (11) is mix refrigerant or the natural refrigerant that contains R32.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003394236 | 2003-11-25 | ||
| JP394236/2003 | 2003-11-25 | ||
| JP026881/2004 | 2004-02-03 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1756931A CN1756931A (en) | 2006-04-05 |
| CN100381769C true CN100381769C (en) | 2008-04-16 |
Family
ID=36689378
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004800057502A Expired - Fee Related CN100381769C (en) | 2003-11-25 | 2004-11-24 | Refrigerating apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100381769C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2997483A3 (en) * | 2012-10-26 | 2014-05-02 | Cinetic Filling | METHOD AND DEVICE FOR FILLING A REFRIGERATED CIRCUIT AT HIGH RATE WITH DIFFERENT FLUIDS SO AS TO FINALLY OBTAIN A HOMOGENEOUS REFRIGERANT FLUID |
| JP6028816B2 (en) * | 2015-01-30 | 2016-11-24 | ダイキン工業株式会社 | Air conditioner |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0783545A (en) * | 1993-09-17 | 1995-03-28 | Hitachi Ltd | Refrigerant change method of air conditioner |
| EP0952407A2 (en) * | 1998-04-24 | 1999-10-27 | Mitsubishi Denki Kabushiki Kaisha | A refrigeration cycle device, a method of producing the device, and a method of operating the device |
| JP2001141340A (en) * | 1999-11-16 | 2001-05-25 | Mitsubishi Electric Corp | Cleaner, method for cleaning piping, refrigeration air conditioner and method for replacing the same |
| JP2002107011A (en) * | 2000-10-02 | 2002-04-10 | Mitsubishi Electric Corp | Cleaning operation method of refrigerating cycle equipment |
-
2004
- 2004-11-24 CN CNB2004800057502A patent/CN100381769C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0783545A (en) * | 1993-09-17 | 1995-03-28 | Hitachi Ltd | Refrigerant change method of air conditioner |
| EP0952407A2 (en) * | 1998-04-24 | 1999-10-27 | Mitsubishi Denki Kabushiki Kaisha | A refrigeration cycle device, a method of producing the device, and a method of operating the device |
| JP2001141340A (en) * | 1999-11-16 | 2001-05-25 | Mitsubishi Electric Corp | Cleaner, method for cleaning piping, refrigeration air conditioner and method for replacing the same |
| JP2002107011A (en) * | 2000-10-02 | 2002-04-10 | Mitsubishi Electric Corp | Cleaning operation method of refrigerating cycle equipment |
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| CN1756931A (en) | 2006-04-05 |
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