CN105408704B - Refrigerating plant - Google Patents
Refrigerating plant Download PDFInfo
- Publication number
- CN105408704B CN105408704B CN201480042573.9A CN201480042573A CN105408704B CN 105408704 B CN105408704 B CN 105408704B CN 201480042573 A CN201480042573 A CN 201480042573A CN 105408704 B CN105408704 B CN 105408704B
- Authority
- CN
- China
- Prior art keywords
- refrigerant
- heat exchanger
- accumulator
- refrigerating plant
- temperature
- 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.)
- Active
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/006—Fluid-circulation arrangements optical fluid control arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B45/00—Arrangements for charging or discharging refrigerant
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/13—Economisers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/16—Receivers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2500/00—Problems to be solved
- F25B2500/01—Geometry problems, e.g. for reducing size
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2500/00—Problems to be solved
- F25B2500/23—High amount of refrigerant in the system
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2500/00—Problems to be solved
- F25B2500/24—Low amount of refrigerant in the system
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
- F25B2700/2106—Temperatures of fresh outdoor air
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
- F25B2700/2116—Temperatures of a condenser
- F25B2700/21162—Temperatures of a condenser of the refrigerant at the inlet of the condenser
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
- F25B2700/2116—Temperatures of a condenser
- F25B2700/21163—Temperatures of a condenser of the refrigerant at the outlet of the condenser
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B40/00—Subcoolers, desuperheaters or superheaters
- F25B40/02—Subcoolers
Abstract
Refrigerating plant at least has compressor (1) through liquid pipe and gas pipe connection, heat source side heat exchanger, supercooling heat exchanger (5), the thermal source side unit of accumulator (4) and the load side unit at least with load side expansion member and load side heat exchanger, formation makes refrigerant in compressor (1), heat source side heat exchanger, supercooling heat exchanger (5), accumulator (4), the refrigerant loop circulated in load side expansion member and load side heat exchanger, wherein, possesses hagioscope (14) in the side of accumulator (4), hagioscope (14) is arranged at can be to the accumulator (4) in operating on the annual position confirmed for maximum refrigerant liquid level (11) position.
Description
Technical field
The present invention relates to refrigerating plant.
Background technology
In the past, in the showcase for supermarket cooling, cooling of the cold store carried out by unit cooler etc.
Refrigerating plant in, showcase is primarily disposed in food sales field, still, and its quantity, size, species, configuration etc. are because of shop
Difference, accordingly, the internal volume for the evaporator being configured in showcase are also different.In addition, the appearance of the evaporator of unit cooler
Product is also different because of species etc., and this point is similarly.In addition, having stored the setting of compressor, condenser, the refrigerator of accumulator
It is also different because of the construction in shop, for example, there is the situation on the back side for being arranged on food sales field or roof.Therefore, evaporator
Change with the distance of compressor, condenser, accumulator because of the setting place of refrigerator, gas extension pipe arrangement, liquid extension are matched somebody with somebody
The length of the extension pipe arrangement such as pipe is also different.
Although freeze cycle is in order to play the refrigerant amount that defined performance needs to be consistent with the internal volume of freeze cycle,
It is that, if the internal volume of evaporator or the length of extension pipe arrangement are different, necessary refrigerant amount (is hereinafter referred to as in freeze cycle
Necessary refrigerant amount) it is also different.Therefore, the refrigerant of refrigerator is filled with (inclosure) after freeze cycle is constituted at the scene.Separately
Outside, the necessary refrigerant amount of freeze cycle is also different because of the state of freeze cycle, the state of freeze cycle also because outside air temperature,
Operating condition of load side apparatus of showcase etc. and it is different.Therefore, the influence of operating condition is generally free from, in filling refrigerant
When, fill much, always to distribute necessary refrigerant amount to each constitution equipment such as condenser, evaporator.
Fig. 7 is the figure of one of the refrigerant loop for representing conventional refrigerating plant.
As the method for judging refrigerant amount, as shown in fig. 7, the liquid that hagioscope 17 is arranged on into the downstream of accumulator 4 is matched somebody with somebody
Pipe, in test running, design temperature, operating stabilization are reduced in storehouse temperature (temperature of the object space cooled down by evaporator)
At the time of, confirm the flash gas in refrigerant (bubble) by visual observation.Further it is proposed to following method, i.e. due to
It is now no remaining refrigerant amount after flash gas disappearance, so, filling is certain ratio relative to the refrigerant amount
Refrigerant.In addition, the charging quantity is corresponding with the variation of the necessary refrigerant amount of the state change generation because of freeze cycle
Residual refrigerant amount.The ratio is in the specification of some producers relative to the system enclosed untill at the time of flash gas disappears
Cryogen amount is 5~10%, still, the proprietary technology as each same dealer, if very few, and lack of refrigerant, cooling is bad, because
This, the situation of refrigerant addition much is more.
In addition, it is proposed that following methods, i.e. the refrigerant liquid level in accumulator is checked by static capacity sensor, will be made
Cryogen amount is determined as remaining, suitable, deficiency, calculates the refrigerant amount of deficiency；And following methods, i.e. set in accumulator side
Hagioscope is put, people detects liquid level by visual observation, to the relation of the refrigerant amount and liquid level position (height) that are provided as data
It is compared, judges remaining, suitable, not enough.Further it is proposed to following methods, i.e. calculate the system of remainder, insufficient section
Cryogen amount, if remaining, then releases refrigerant, if not enough, is then filled (referring to patent document 1).
Citation
Patent document
Patent document 1：Japanese Patent No. 2997487 (for example, see page 2~3, Fig. 4)
The content of the invention
Invent problem to be solved
In method by visual observation to confirm flash gas, flash gas once disappear and liquid refrigerant is accumulated in
In the case of in accumulator, it is not known that the refrigerant amount of actually what kind of degree is accumulated in accumulator.Even if particularly wrong
Be filled with substantial amounts of refrigerant amount by mistake, can not to confirming in accumulator, therefore, as remain be filled with it is unnecessary
Refrigerant over packing state situation it is a lot.In addition, being let out when because the in poor shape of equipment, maintenance etc. generate refrigerant
After the situation of leakage, equipment recovers normal, unclear in the case of not producing flash gas when starting again at the operating of refrigerator
Chu is that the refrigerant amount in accumulator is just suitable, or the refrigerant amount in accumulator is abundant.Therefore, filling with allowing some leeway
Refrigerant, still, in the case of refrigerant amount in accumulator is sufficient, as a result, unnecessary refrigerant is filled with, into
For refrigerant over packing.
In the case of as refrigerant over packing, on the basis of in refrigerant over packing part cost being uprised, also
Produce following shortcoming.The liquid refrigerant quantitative change accumulated in condenser is more, and heat exchanger performance reduction, high pressure rises.And
And, COP reductions, consumption electricity increase, in the worst case, the operating of refrigerator stops because of High Abnormal Pressure.In addition, because
Evaporator it is in poor shape etc., refrigerator produce refrigerant do not evaporate but with liquid condition return return liquid in the case of,
Generally, if residual refrigerant part is deposited in reservoir, high-pressure side turns into lack of refrigerant, and condensator outlet is from liquid condition
As two-phase state, therefore, the refrigerant flow passed through in expansion valve 6 is reduced, and refrigerant is difficult to overflow from reservoir.With this phase
Right, if residual refrigerant is more, even if reservoir is the full liquid of refrigerant, high-pressure side will not also turn into lack of refrigerant, condenser
Outlet maintains liquid phase, and refrigerant flow is not reduced, even if possessing reservoir, and liquid refrigerant can also overflow from reservoir.
Moreover, the liquid refrigerant of the spilling returns to compressor suction, there is compressor because of the oil concentration reduction in compressor, from pressure
Oil export of contracting machine etc. and occur damaged situation.
Further, since in the case where being contemplated and being filled with refrigerant, it is necessary to set to reduce back infringement during liquid
Put reservoir or increase the volume of reservoir, so, cost is improved and the outer deformation of product is big.Further, since by making accumulator
The liquid operation valve in downstream, liquid electromagnetic valve are closed, and refrigerant can be reclaimed into accumulator, thus, it is necessary to hold accumulator
Product becomes big, and cost is improved and the outer deformation of product is big.
In addition, in order to confirm flash gas, it is necessary to which the size with liquid pipe will correspondingly be spied on as shown in FIG. 7
Window 17 is arranged on the liquid pipe in the downstream of accumulator 4, and cost is uprised.
In addition, in the case of just in case refrigerant have leaked because of the not good grade of status of equipment, the infringement for giving environment enters one
Step becomes big.
In addition, by determining amount of refrigerant be remaining, suitable, not enough as the static capacity sensor shown in patent document 1, and
The method for calculating the refrigerant amount of deficiency is high cost, is almost not reaching to practical, such case is present situation.In addition, inciting somebody to action
It can interpolate that suitable, remaining, not enough hagioscope is arranged in the method for accumulator side, internal volume, extension in evaporator
The operating conditions such as length, the storehouse temperature of pipe arrangement are significantly in different refrigerator, and suitable, remaining, not enough refrigerant amount is every
Individual refrigeration system is widely different.Therefore, to tackle the change of the refrigerant amount, it is necessary to which big hagioscope, still, this is not also existing
It is real, also it is high cost even if implementing.
The present invention is the invention made at least one in the problem as solving above, and the purpose is to provide
A kind of refrigerant charge that can be easily and when being suitably carried out test running or during refrigerating plant maintenance, over packing can be suppressed
Refrigerating plant.
Means for solving the problems
Refrigerating plant for the present invention is connected to through liquid pipe and gas pipe at least has compressor, heat source side
Heat exchanger, supercooling heat exchanger, the thermal source side unit of accumulator and at least have load side expansion member and load side heat
The load side unit of exchanger, foring makes refrigerant in the compressor, the heat source side heat exchanger, supercooling heat
The refrigerant loop circulated in exchanger, the accumulator, the load side expansion member and the load side heat exchanger,
Wherein, possesses hagioscope in the side of the accumulator, the hagioscope is arranged on can be to the accumulator in operating
On the annual position confirmed for maximum refrigerant liquid level position.
The effect of invention
According to refrigerating plant for the present invention, because being configured to set the refrigerant liquid level position for being able to confirm that accumulator
Hagioscope, the liquid level position represents the maximum refrigerant liquid level position in operating, thus it is possible to easily, it is rapid and accurate
Refrigerant charge when test running is implemented on ground or when refrigerating plant is repaired, can suppress over packing.
Brief description of the drawings
Fig. 1 is the figure of one of the refrigerant loop for the refrigerating plant for representing embodiment 1 for the present invention.
Fig. 2 is the Mollier line corresponding from different condensation temperatures of the refrigerating plant of embodiment 1 for the present invention
Figure.
Fig. 3 is liquid in the accumulator relative to outside air temperature for the refrigerating plant for representing embodiment 1 for the present invention
The figure of body ratio.
Fig. 4 is the figure of one of the hagioscope for the refrigerating plant for representing embodiment 1 for the present invention.
Fig. 5 is the figure of other examples of the refrigerant loop for the refrigerating plant for representing embodiment 1 for the present invention.
Fig. 6 is the figure of one of the hagioscope for the refrigerating plant for representing embodiment 2 for the present invention.
Fig. 7 is the figure of one of the refrigerant loop for representing conventional refrigerating plant.
Embodiment
Below, embodiments of the present invention are illustrated with reference to the accompanying drawings.In addition, the present invention is not by embodiment party described below
The invention that formula is limited.In addition, in following accompanying drawing, the magnitude relationship that there is each component parts is different from actual magnitude relationship
Situation.
Embodiment 1.
Fig. 1 is the figure of one of the refrigerant loop for the refrigerating plant for representing embodiment 1 for the present invention.
Possess outdoor unit 100 and indoor unit 200 about the refrigerating plant of present embodiment 1.
Outdoor unit 100 possesses compressor 1, condenser 3, accumulator 4 and supercooling heat exchanger 5.
In addition, in the downstream of supercooling heat exchanger 5, being branched to the primary flow path of the evaporator 7 of whereabouts indoor unit 200
22 and whereabouts compressor 1 injection tip 1a injection stream 23, liquid operation valve 10 is set in the side of primary flow path 22, in injection stream
The side of road 23 sets expansion valve 8.In addition, indoor unit 200 is utilized by showcase, unit cooler etc..
Indoor unit 200 possesses liquid electromagnetic valve 9, expansion valve 6 and evaporator 7.In addition, indoor unit 200 passes through liquid
Body extension pipe arrangement 18 and gas extension pipe arrangement 19 are connected with outdoor unit 100.Moreover, being formed makes refrigerant successively in compressor
1st, the refrigerant loop that condenser 3, accumulator 4, supercooling heat exchanger 5, expansion valve 6 and evaporator 7 are circulated.
To condenser 3, accumulator 4, supercooling heat exchanger 5, evaporator 7, liquid extension pipe arrangement 18 and gas extension
The refrigerant amount that pipe arrangement 19 is distributed is determined by respective internal volume, performance and operating condition, is filled in the system of freeze cycle
Each constitution equipment of freeze cycle in cryogen turn into appropriate refrigeration dosage after residual refrigerant accumulated in accumulator 4 it
In.
Compressor 1 is to suck refrigerant and by the refrigerant compression, becomes the part of the state of HTHP.Separately
Outside, injection tip 1a is the port of the intermediate pressure for the discharge chambe for making refrigerant flow into the compression way of compressor 1.Condenser 3 is
Heat exchange is carried out between the air and refrigerant from the pressure fan supply for omitting diagram, and refrigerant is condensed, is made
The part of liquid refrigerant.
Accumulator 4 is configured between condenser 3 and evaporator 7, is the part for accumulating residual refrigerant.In addition, by liquid
As long as device 4 can accumulate the container of residual refrigerant.Supercooling heat exchanger 5 be with condenser 3 it is same in air and
Heat exchange is carried out between refrigerant and by the overcooled part of liquid refrigerant.Expansion valve 6,8 is that refrigerant is depressurized and is allowed to
The part of expansion.The expansion valve 6,8 can by changeably can control aperture part, such as precision based on electronic expansion valve
Cheap refrigerant flow adjustment means such as flow control member, capillary etc. constitute.
Evaporator 7 is that heat exchange is carried out between the air and refrigerant from the pressure fan supply for omitting diagram, and will system
Cryogen evaporates the part for making gas refrigerant.The object spaces such as showcase are cooled down by the evaporator 7.Liquid electromagnetic valve 9
It is to be made whether to make the part of the control of refrigerant inflow evaporator 7 by the opening and closing of electronic type.Liquid operation valve 10 is to pass through
The opening and closing of hand, makes the part that refrigerant is flowed into or influent does not extend pipe arrangement 18.
In addition, about present embodiment 1 refrigerating plant possess judge be filled in refrigerant loop refrigerant whether
It is filled with the determining amount of refrigerant component 20 of minimum necessary amount.Determining amount of refrigerant component 20 for example can be by being arranged on freezing
Microcomputer in the control base board of device etc. is constituted.Inputted to the determining amount of refrigerant component 20 by the 1st temperature sensor
(TH5), the temperature information that the 2nd temperature sensor (TH8) and the 3rd temperature sensor (TH6) are checked.
1st temperature sensor (TH5) is in the outlet side or condenser 3 of condenser 3, and being arranged on from refrigerant turns into
The part of two-phase state to the optional position of the stream of the entrance side of supercooling heat exchanger 5, checks the temperature of refrigerant.
2nd temperature sensor (TH8) is arranged on the entrance side from the outlet side of supercooling heat exchanger 5 to expansion valve 6
Stream optional position, check refrigerant temperature.
3rd temperature sensor (TH6) checks the temperature that the air before heat exchange is carried out in condenser 3 and refrigerant.
In addition, setting the display part 21 for showing result of determination and various information in determining amount of refrigerant component 20, this shows
Show that portion 21 is constituted such as by 7 sections of LED.
In addition, when filling refrigerant to refrigerant loop, using the liquefied gas bottle for omitting diagram.
The refrigerant circulated in refrigerant loop is primarily present in condenser 3, accumulator 4, liquid extension pipe arrangement 18, evaporation
Device 7 and gas extension pipe arrangement 19.In the case where refrigerant is gas phase, because temperature is higher, density is higher, so, in gas
In condenser 3 more than phase, condensation temperature is higher, and refrigerant more accumulates in condenser 3.For accumulator 4, gas phase be it is leading,
Condensation temperature is higher, and refrigerant more accumulates in accumulator 4.In addition, in the case of for liquid phase, because temperature is lower, density is got over
Height, so, fluid temperature is lower, and refrigerant more accumulates in liquid extension pipe arrangement 18.
Fig. 2 is the Mollier line corresponding from different condensation temperatures of the refrigerating plant of embodiment 1 for the present invention
Figure.In addition, the Tc in Fig. 2 represents condensation temperature, Te represents evaporating temperature.
In the evaporator 7, although the two-phase system cryogen throttled by expansion valve 6 is evaporated, as gas phase, still, such as Fig. 2 institutes
Show, it is bigger close to the humidity after expansion valve 6 because condensation temperature is lower, so, substantial amounts of refrigerant accumulates in evaporator 7
It is interior.
Thus, the variation produced by season of refrigerant amount is certain in evaporating temperature necessary to operating refrigerating plant
When, the relativeness for extending pipe arrangement+evaporator capacity by the volume of condenser 3, the volume of accumulator 4 and liquid is determined, if condenser
3rd, the ratio of the volume of accumulator 4 becomes big, then condensation temperature is higher, and necessary refrigerant amount is more, if liquid extends pipe arrangement+evaporator
The ratio of volume is bigger, then condensation temperature is lower, and necessary refrigerant amount is more.
In addition, the necessary volume of accumulator 4 due to being necessary by closing the liquid operation valve 10 in the downstream of accumulator 4 and
Refrigerant can be reclaimed into accumulator 4, so, it is big by the volume for being added the volume of condenser 3 and the liquid extension volume of pipe arrangement 18
Cause to determine, be following value.
[formula 1]
Accumulator volume=(condenser volume+liquid extension pipe arrangement volume) × (125% ± 25%)
Fig. 3 is liquid in the accumulator 4 relative to outside air temperature for the refrigerating plant for representing embodiment 1 for the present invention
The figure of body ratio.Fig. 4 is the figure of one of the hagioscope 14 for the refrigerating plant for representing embodiment 1 for the present invention.
Fig. 3 according to condition represent liquor ratio in accumulator 4 (part that liquid refrigerant in=accumulator 4 is present
The volume of volume ÷ accumulators 4) because outside air temperature changes and how to change.
The use scope of outside air temperature around outdoor unit 100 is -15~43 DEG C.In graphical representation accumulator 4
Refrigerant amount how to be changed according to the change of outside air temperature.Generally, the volume of the volumetric ratio unit cooler of showcase is big.
In the case where Fig. 3 load is showcase, under conditions of piping length 100m curve map be load volume is big, extension pipe arrangement
The rate of change of liquor ratio is maximum example in the small accumulator 4 of the volume of long, condenser 3 and accumulator 4.With regard to accumulator
In 4 for the maximum of the rate of change of liquor ratio, refrigerant amount is the volume of accumulator 4 in 43 DEG C of outside air temperature
22.7%, it is 0.0% in -15 DEG C of outside air temperature, its amplitude of variation is 22.7% on the other hand.
That is, during due to 43 DEG C of outside air temperature, necessary refrigerant is few, so, residual refrigerant largely accumulates in collection
In liquid case, because in -15 DEG C of outside air temperature, necessary refrigerant is more, so, residual refrigerant disappears, and accumulates in catch box
Refrigerant disappear.Outside air temperature is lower, more in the presence of the increased trend of necessary refrigerant amount, because with condenser 3, by liquid
The variable quantity of the inner refrigerant amount of device 4 is compared, and the variable quantity of liquid extension pipe arrangement+evaporator capacity inner refrigerant amount is big.In outer gas
The change for not having liquor ratio in accumulator when below 5 DEG C of temperature be because implement be manipulate condenser 3 air quantity of fan simultaneously
Condensation temperature is remained to constant control.
Therefore, as shown in figure 4, hagioscope 14 to be arranged on to the side of accumulator 4, and it is relative to catch box inner refrigerant
Amount maximum (above-mentioned 22.7%) with leaving about 10% leeway maximum 33.0% position, so as to confirm accumulator 4
Refrigerant liquid level 11 position, using the position as annual for the maximum position of refrigerant liquid level 11.Hagioscope 14 is installed
On the runner plate from accumulator 4, the copper pipe arrangement 16 of trunk.In addition, hagioscope 14 has the function of determining whether moisture, make
The size identical or less than that with the liquid size for extending pipe arrangement 18.Or, the shell of accumulator 4 can also be set directly at,
But, the refrigerant liquid level 11 in accumulator 4 is easily upset in the flowing of refrigerant, it is difficult to confirm refrigerant liquid level 11.
Fig. 5 is the figure of other examples of the refrigerant loop for the refrigerating plant for representing embodiment 1 for the present invention.
Indoor unit 100A is same with Fig. 1, possesses compressor 1, condenser 3, accumulator 4 and supercooling heat exchanger
5A, still, the heat that supercooling heat exchanger 5A can carry out refrigerant and refrigerant by the dual pipe of heat-exchangers of the plate type, copper pipe are handed over
Change.It is primary flow path 22 and the injection tip of whereabouts compressor 1 towards evaporator 7 in supercooling heat exchanger 5A downstream branch
1a injection stream 23, in injection stream 23 side, is linked in sequence according to expansion valve 8, supercooling heat exchanger 5A.
In addition, " outdoor unit 100 " is equivalent to " the thermal source side unit " in the present invention.
In addition, " indoor unit 200 " is equivalent to " the load side unit " in the present invention.
In addition, " condenser 3 " is equivalent to " the heat source side heat exchanger " in the present invention.
In addition, " expansion valve 6 " is equivalent to " the load side expansion member " in the present invention.
In addition, " evaporator 7 " is equivalent to " the load side heat exchanger " in the present invention.
In addition, " liquid extends pipe arrangement 18 " equivalent to " liquid pipe " in the present invention.
In addition, " gas extends pipe arrangement 19 " equivalent to " gas pipe " in the present invention.
Then, according to Fig. 1 and Fig. 5, the flowing to the refrigerant of the refrigerating plant of embodiment 1 for the present invention is entered
Row explanation.
The gas refrigerant for the HTHP discharged from compressor 1 flows into condenser 3.The high temperature for being flowed into condenser 3 is high
The gas refrigerant of pressure in condenser 3 with air carry out heat exchange and be condensed, as high pressure liquid refrigerant (liquid phase or
Two-phase state), accumulated in accumulator 4.The high pressure liquid refrigerant of accumulator 4 is accumulated in further in supercooling heat exchange
Device 5 and air heat exchange, as the liquid refrigerant being over cooled.
Here, liquid refrigerant is accumulated in accumulator 4 and occurred only at each structure in addition to accumulator 4 of freeze cycle
The refrigerant amount of forming apparatus is appropriate amount and in the case of generating residual refrigerant, is set in each composition in addition to accumulator 4
In the case of standby short of refrigerant, accumulate in accumulator 4 is only gas refrigerant.
In addition, in the downstream of supercooling heat exchanger 5 to the refrigerant of the HTHP of injection stream 23 side branch swollen
Swollen valve 8 is depressurized as intermediate pressure, hereafter, the spray for the intermediate pressure that the discharge chambe flowed directly into the compression way with compressor 1 is connected
Port 1a is penetrated, accordingly, making the discharge temperature of compressor 1 reduces.
In addition, in the case of fig. 5, the refrigerant to the HTHP of injection stream 23 side branch is subtracted in expansion valve 8
Press as intermediate pressure, hereafter, carry out heat exchange in supercooling heat exchanger 5 and high-temperature high-pressure refrigerant, flow into the injection of compressor 1
Port 1a.
Determining amount of refrigerant component 20 in present embodiment 1 is judged using the temperature efficiency ε of supercooling heat exchanger 5
Whether refrigerant is filled with whether minimum necessary amount (is that liquid refrigerant is accumulated in accumulator 4, freeze cycle removes accumulator
The refrigerant charge of each constitution equipment beyond 4 appropriate amount).The temperature efficiency ε of supercooling heat exchanger 5 is supercooling heat friendship
Degree of subcooling (the outlet temperature of 3 outlet temperature TH5- supercooling heat exchanger of condenser 5 of refrigerant in the outlet of parallel operation 5
TH8) divided by obtained by maximum temperature difference (the outlet temperature TH5- outside air temperature TH6 of condenser 3) it is worth, is represented with following (formulas 1).
For example, at the time of ε reaches 0.6, being judged to being filled with minimum necessary refrigerant amount.
[formula 2]
ε=(TH5-TH8) ÷ (TH5-TH6)
(method of filling in coolant during test running)
Then, to used the accumulator 4 shown in such temperature efficiency ε and Fig. 4 hagioscope 14 test running when
The specific method of refrigerant charge is illustrated.
First, after vacuumizing in the loop for implementing refrigerating plant, filled in the state of refrigerating plant is stopped
Refrigerant.Hereafter, refrigerating plant is simultaneously operated, refrigerant is simultaneously little by little filled.Now, by using the control of refrigerating plant
Switch on substrate processed etc. is configured to determining amount of refrigerant pattern, shows whether refrigerant fills on the LED of substrate according to above-mentioned ε
It is filled with minimum necessary amount.For example, the value in ε is more than 0.6, in the case that refrigerant reaches minimum necessary amount, O is shown in LED
(pronunciation)。
In addition, ε value less than 0.6, in the case of not up to minimum necessary amount, LED show N.Operating personnel's one side
Confirm the display, simultaneously implement refrigerant charge, LED display from N become turn to O () at the time of, filled with the record such as note
The refrigerant amount filled out.Quality of the calculating of the refrigerant amount of filling generally by measuring the liquefied gas bottle before filling and after filling
To implement.Moreover, from LED display from N become turn to O () at the time of, be hereafter filled with refrigerant amount turn into by
The remaining refrigerant amount accumulated in liquid device 4 as liquid refrigerant.
Hereafter, somewhat close to target temperature, after the stable state of operating, operating personnel in refrigerating plant
Simultaneously confirm the hagioscope 14 of the side of accumulator 4, simultaneously little by little add refrigerant until that can confirm by hagioscope 14
Refrigerant liquid level 11.Because at the time of can confirm refrigerant liquid level 11 by hagioscope 14, refrigerant amount is in by liquid
32.0% position of the volume of device 4, so, even if hereafter the condition such as outside air temperature changes, also turn into not in the absence of refrigerant amount
The situation of sufficient state.
That is, from LED display from N become turn to O () at the time of, refrigerant is appended to can be by accumulator 4
The hagioscope 14 of side confirms that the amount of refrigerant liquid level 11 turns into remaining refrigerant.And, although due to outside air temperature, evaporation
Temperature, operating frequency are different because of season, cause necessary refrigerant amount to change, but be filled with the refrigerant of the part of the change
Amount.
Further, since the refrigerant amount filled at the time of can confirm refrigerant liquid level 11 by hagioscope 14 is enough,
So, do not refill refrigerant.
If in addition, the display that the controller in refrigerator can recognize the LED of above-mentioned record becomes at the time of turning to O from N
The storehouse temperatures such as reading value, refrigeration, the showcase of each portion's sensor such as outside air temperature TH6, the length and load for extending pipe arrangement
The field datas such as showcase or unit cooler, then can be from Fig. 3 curve map or Japanese Unexamined Patent Publication 2012-132639
Publication etc. adds how many Kg refrigerants after calculating and can enclose annual enough refrigerant amounts.The amount is included in LED, if
It can enclose, then It is not necessary to which refrigerant to be sealing into the position of hagioscope 14.For example, when the value in outside air temperature TH6 is -15
DEG C when implement refrigerant inclosure in the case of, additional refrigerant amount is the 10% of the volume of accumulator 4 of substantial portion, display
The amount.In addition, when outside air temperature TH6 value be 30 DEG C, to extend the length of pipe arrangement be that 80m, load are showcase when, implement refrigeration
In the case that agent is enclosed, additional refrigerant amount is the 12.1%+ substantial portion 10%=22.1% of the volume of accumulator 4, is shown
Show the amount.
(method of filling in coolant during maintenance)
Then, the system in the state of the refrigerant such as situation to repairing product is somewhat remained in refrigerant loop
Cryogen placement method is illustrated.
Operating personnel's one side operating refrigerating plant, simultaneously confirms the hagioscope 14 of the side of accumulator 4.It is being able to confirm that liquid
In the case of refrigerant, due to different so that necessary refrigerant because of season including outside air temperature, evaporating temperature, operating frequency
The part of amount change has been filled with enough refrigerant amounts interiorly, so, it is not necessary that especially add refrigerant.Conversely,
In the case that there is filling refrigerant too much, refrigerant is reclaimed until being able to confirm that refrigerant liquid level 11.
In addition, in the case where not can confirm that refrigerant liquid face 11, passing through switch in the control base board of refrigerating plant etc.
Determining amount of refrigerant pattern is configured to, LED is confirmed.In the case where being shown as N, it is known that be not enough minimum necessary refrigerant amount
Refrigerant amount, refrigerant additional quantity needs much.Be shown as O () in the case of, it is known that due to reaching minimum necessary refrigeration
Dosage, so, by additional a small amount of refrigerant, including difference causes because of season for outside air temperature, evaporating temperature, operating frequency
The possibility that the part of necessary refrigerant amount change has been filled with enough refrigerant amounts interiorly is high.Especially in the winter time etc.
In the case that outside air temperature is low, it is known that be shown as O () in the case of, be filled with annual enough refrigerant amounts can
Can property height.
Further, since the refrigeration filled at the time of being also and confirming refrigerant liquid level 11 by hagioscope 14 in maintenance
Dosage is enough, so, do not refill refrigerant.
Then, illustrate by there is the method for no moisture in the confirmation refrigerant loop of hagioscope 14.
Closing liquid magnetic valve 9 or liquid operation valve 10 are implemented into accumulator 4 in by being operated in refrigerating plant
Reclaim the evacuation of refrigerant.Accordingly, the hagioscope 14 of the side of accumulator 4 turns into full liquid condition, can be spied on by being attached to
The water content indicator (moisture detector) of the omission diagram of window 14 confirms there is no moisture in refrigerant loop.
As noted previously, as making the hagioscope 14 for setting the position of refrigerant liquid level 11 for being able to confirm that accumulator 4 and being somebody's turn to do
Liquid level position represents the structure of the maximum position of refrigerant liquid level 11 in operating, thus it is possible to easily, it is quickly and accurately real
Refrigerant charge when applying test running or when refrigerating plant is repaired, can prevent over packing.Thus, due to by suppressing high pressure
Rise and become energy-conservation, and refrigerant charge amount can be made few, so can become the influence caused to cost, environment, infringement
It is small.And then, accumulator 4, the reservoir for omitting diagram, hagioscope 14 can be made to diminish, goods cost can be reduced, be allowed to tight
Gather.
In addition, by making the hagioscope 14 of the side of accumulator 4 identical with the size that main liquid extends pipe arrangement 18 or comparing
It is small, and with water content indicator (moisture detector), can reduce goods cost, and be able to confirm that in refrigerant there is anhydrous
Point.Therefore, can prevent because the burn into that moisture is mixed into the refrigerant loop part produced in refrigerant loop gets rusty, because of ice
The undesirable conditions such as the oil return hole plug of reservoir that accumulation is caused, it is possible to increase reliability.
In addition, being taken out in hagioscope 14 by copper pipe arrangement 16 from runner plate, the trunk of accumulator 4 without being set directly at accumulator
In the case of on 4, the stabilization of refrigerant liquid level 11 can be made, the confirmation for whetheing there is refrigerant liquid level 11 is become easy.
Embodiment 2.
Fig. 6 is the figure of one of the hagioscope 14,15 for the refrigerating plant for representing embodiment 2 for the present invention.
In addition, in present embodiment 2, by with being illustrated centered on the difference of present embodiment 1, pair with this embodiment party
The identical part of formula 1 marks identical symbol, omits the description.
In embodiment 2, to being made according to season, outside air temperature, high pressure etc. annual for maximum refrigerant liquid level 11
Change in location confirm that the situation of refrigerant charge amount is illustrated.
In the winter time etc., in the case that outside air temperature is low in refrigerant charge operation, if filling refrigerant is until in control base
The LED of plate from N turn into O () after, refrigerant liquid level 11 can be confirmed by hagioscope 14, then presence exceedes and necessarily filled
The situation of refrigerant.Accordingly it is also possible to which high pressure when being operated according to outside air temperature or refrigerator adds the system filled to change
Cryogen amount.
That is, as shown in figure 3, the length that the refrigerant amount in accumulator 4 changes maximum extension pipe arrangement is 100m, display
In the case that cabinet is load, the reduction of outside air temperature from 30 DEG C of inner refrigerant amounts of the accumulator varied in the case of -15 DEG C 4 is
12.1%.Therefore, in the case of implementing refrigerant adjustment by test running when in 32 DEG C of outside air temperature, LED from N turn into O () after additional filling refrigerant amount can also be 12.1%+ substantial portions 10%=22.1%.
Therefore, as outside air temperature be less than 30 DEG C in the case of carry out refrigerant charge operation situation countermeasure, such as
Shown in Fig. 6, hagioscope (summer confirms to use) 15 is set in the position of 22.1% (=12.1%+ substantial portions 10%), by the position
Put as outside air temperature be less than 30 DEG C in the case of the position of refrigerant liquid level 12.That is, relative to the hagioscope 14 of embodiment 1
Position, additional hagioscope (being used in the case where outside air temperature is less than 30 DEG C) 15, is spied on by 2 in embodiment 2
Window confirms refrigerant liquid level 11,12.
So, when can more accurately implement test running than embodiment 1 or refrigerating plant maintenance when system
Cryogen is filled, and can prevent over packing.Thus, due to becoming energy-conservation by suppressing high pressure rising, and refrigerant can be filled
Fill out that quantitative change is few, thus it is possible to make the influence caused to cost, environment, infringement diminish.And then, can make accumulator 4, reservoir,
Hagioscope 14,15 diminishes, it is possible to decrease goods cost, is allowed to compact.
Symbol description
1：Compressor；1a：Injection tip；3：Condenser；4：Accumulator；5：Supercooling heat exchanger；6：Expansion valve；7：Steam
Send out device；8：Expansion valve；9：Liquid electromagnetic valve；10：Liquid operation valve；11：Refrigerant liquid level；12：Refrigerant liquid level (summer)；
14：Hagioscope；15：Hagioscope (summer confirms to use)；16：Copper pipe arrangement；17：Hagioscope；18：Liquid extends pipe arrangement；19：Gas prolongs
Super long tube；20：Determining amount of refrigerant component；21：Display part；22：Primary flow path；23：Spray stream；100：Outdoor unit；100A：
Outdoor unit；100B：Outdoor unit；200：Indoor unit；200A：Indoor unit；200B：Indoor unit.
Claims (8)
1. a kind of refrigerating plant, the refrigerating plant is connected to through liquid pipe and gas pipe at least has compressor, heat
Source heat exchanger, supercooling heat exchanger, the thermal source side unit of accumulator and at least have load side expansion member and load
The load side unit of side heat exchanger,
Foring makes refrigerant in the compressor, the heat source side heat exchanger, the supercooling heat exchanger, described by liquid
The refrigerant loop circulated in device, the load side expansion member and the load side heat exchanger,
Characterized in that,
Possess hagioscope in the side of the accumulator,
The hagioscope, which is arranged on, to be entered to the accumulator in operating annual for maximum refrigerant liquid level position
What row confirmed and refrigerant liquid level position of the refrigerant in less than the 33% of the volume of the accumulator can be confirmed
On position,
The hagioscope is size identical with the liquid pipe or smaller than the liquid pipe.
2. refrigerating plant as claimed in claim 1, it is characterised in that
The volume of the accumulator is defined in the volume of the heat source side heat exchanger and the volume sum of the liquid pipe
125% ± 25% in the range of.
3. refrigerating plant as claimed in claim 1 or 2, it is characterised in that
Can to defining outside air temperature in the case of the position that is confirmed of highest liquid level position on, be additionally provided with least
One hagioscope.
4. refrigerating plant as claimed in claim 1 or 2, it is characterised in that
Possess the refrigerant for judging to be filled in the refrigerant loop and whether be filled with the refrigerant amount of minimum necessary amount and sentence
Determine component.
5. refrigerating plant as claimed in claim 4, it is characterised in that
Possess the 1st temperature sensor, the 2nd temperature sensor and outside air temperature sensor,
1st temperature sensor is arranged on from the outlet side of the heat source side heat exchanger to the supercooling heat exchanger
Entrance side stream optional position, detect the temperature of the refrigerant,
2nd temperature sensor is arranged on from the outlet side of the supercooling heat exchanger to the load side expansion member
Entrance side stream optional position, detect the temperature of the refrigerant,
The outside air temperature sensor detection carries out the air of heat exchange in the heat source side heat exchanger and the refrigerant
Temperature,
The determining amount of refrigerant component
According to the detection temperature of the 1st temperature sensor and the temperature difference of the detection temperature of the 2nd temperature sensor, obtain
Degree of subcooling,
According to the detection temperature of the 1st temperature sensor and the temperature difference of the detection temperature of the outside air temperature sensor, ask
Go out the maximum temperature difference of the supercooling heat exchanger.
6. refrigerating plant as claimed in claim 4, it is characterised in that
The determining amount of refrigerant component possesses display part,
Show whether the refrigerant for being filled in the refrigerant loop has been filled with sentencing for minimum necessary amount in the display part
Determine result.
7. refrigerating plant as claimed in claim 6, it is characterised in that
The display part is made up of 7 sections of LED.
8. refrigerating plant as claimed in claim 1 or 2, it is characterised in that
The hagioscope carries moisture audit function.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2014/051690 WO2015111222A1 (en) | 2014-01-27 | 2014-01-27 | Refrigeration device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105408704A CN105408704A (en) | 2016-03-16 |
| CN105408704B true CN105408704B (en) | 2017-10-24 |
Family
ID=53681048
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201480042573.9A Active CN105408704B (en) | 2014-01-27 | 2014-01-27 | Refrigerating plant |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPWO2015111222A1 (en) |
| CN (1) | CN105408704B (en) |
| WO (1) | WO2015111222A1 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6605131B2 (en) * | 2016-05-09 | 2019-11-13 | 三菱電機株式会社 | Refrigeration equipment |
| US11085683B2 (en) * | 2018-06-22 | 2021-08-10 | Emerson Climate Technologies Retail Solutions, Inc. | Systems and methods for optical detection of refrigeration system abnormalities |
| EP3951288A4 (en) * | 2019-03-26 | 2022-03-23 | Mitsubishi Electric Corporation | Outdoor unit and refrigeration cycle device equipped with same |
| WO2020242736A1 (en) * | 2019-05-24 | 2020-12-03 | Carrier Corporation | Low refrigerant charge detection in transport refrigeration system |
| CN110763273A (en) * | 2019-10-30 | 2020-02-07 | 无锡纽思铁科能源科技有限公司 | Ice plug forming process detection device |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4973752A (en) * | 1972-11-18 | 1974-07-16 | ||
| JPS63156979A (en) * | 1986-12-19 | 1988-06-30 | 松下電器産業株式会社 | Heat pump type air conditioner |
| JP2997487B2 (en) * | 1989-12-13 | 2000-01-11 | 株式会社日立製作所 | Refrigeration apparatus and method for indicating amount of refrigerant in refrigeration apparatus |
| JPH03204574A (en) * | 1990-01-04 | 1991-09-06 | Sanden Corp | Receiver drier for air-conditioning system |
| JPH0571835A (en) * | 1991-09-12 | 1993-03-23 | Daikin Ind Ltd | Receiver |
| JP3644077B2 (en) * | 1995-07-18 | 2005-04-27 | 株式会社デンソー | Refrigeration cycle |
| JPH09243215A (en) * | 1996-03-07 | 1997-09-19 | Calsonic Corp | Steam compression type refrigerating machine and refrigerant quantity judging apparatus |
| JPH10281599A (en) * | 1997-04-02 | 1998-10-23 | Hitachi Ltd | Refrigerant amount determining apparatus |
| JPH11182990A (en) * | 1997-12-18 | 1999-07-06 | Yamaha Motor Co Ltd | Refrigerant recirculating type heat transfer device |
| JP2002295915A (en) * | 2001-03-30 | 2002-10-09 | Mitsubishi Electric Corp | Air conditioner |
| KR100654178B1 (en) * | 2001-12-19 | 2006-12-05 | 한라공조주식회사 | Method for making a decision receiver dryer's volume and condenser and receiver dryer having the volume by it in one united body |
| CN101769655A (en) * | 2010-01-25 | 2010-07-07 | 大连三洋压缩机有限公司 | Automatic recovery and fill system of refrigeration system |
| JP5674452B2 (en) * | 2010-12-22 | 2015-02-25 | 三菱電機株式会社 | Refrigeration equipment |
| CN201935493U (en) * | 2011-03-01 | 2011-08-17 | 合肥天鹅制冷科技有限公司 | Liquid storage tank |
-
2014
- 2014-01-27 CN CN201480042573.9A patent/CN105408704B/en active Active
- 2014-01-27 JP JP2015558712A patent/JPWO2015111222A1/en active Pending
- 2014-01-27 WO PCT/JP2014/051690 patent/WO2015111222A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| CN105408704A (en) | 2016-03-16 |
| JPWO2015111222A1 (en) | 2017-03-23 |
| WO2015111222A1 (en) | 2015-07-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7065979B2 (en) | Refrigeration system | |
| CN105408704B (en) | Refrigerating plant | |
| CN204063699U (en) | Refrigerating circulatory device | |
| CN102792108B (en) | Refrigeration air conditioning device | |
| CN108027188A (en) | Freezing cycle device | |
| CN102472542B (en) | Air conditioner and refrigerant amount detection method for air conditioner | |
| CN103968588B (en) | Refrigeration machine and the refrigeration plant using the refrigeration machine | |
| CN105378393B (en) | Refrigerating plant | |
| CN104813120B (en) | Refrigerating plant | |
| CN105917178B (en) | Refrigerating plant | |
| CN104596172B (en) | Refrigeration air conditioning device | |
| CN104833123B (en) | Refrigerating plant | |
| CN104833124B (en) | Refrigerating plant | |
| WO2006087004A1 (en) | Control of a refrigeration circuit with an internal heat exchanger | |
| CN106415153A (en) | Refrigeration cycle device | |
| CN104142033B (en) | A kind of carbon dioxide refrigeration apparatus structure | |
| CN106382768B (en) | Air conditioner | |
| CN206055994U (en) | Refrigerating circulatory device | |
| CN207600009U (en) | A kind of folding type cooling system of freezer with hot gas defrosting | |
| CN103822419B (en) | Refrigerating plant | |
| JP6157182B2 (en) | Refrigeration equipment | |
| JP5756919B2 (en) | Refrigeration equipment | |
| CN102538269B (en) | Compression refrigerating machine | |
| CN111486635A (en) | Low-temperature storage device and control method thereof | |
| CN100485285C (en) | Ultralow temperature refrigerator, refrigerating system, and vacuum apparatus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |