CN105431692B - Refrigerating circuit - Google Patents
Refrigerating circuit Download PDFInfo
- Publication number
- CN105431692B CN105431692B CN201380077073.4A CN201380077073A CN105431692B CN 105431692 B CN105431692 B CN 105431692B CN 201380077073 A CN201380077073 A CN 201380077073A CN 105431692 B CN105431692 B CN 105431692B
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- Prior art keywords
- refrigerating circuit
- sub
- refrigerant
- condenser
- cooled
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- 239000003507 refrigerant Substances 0.000 claims abstract description 114
- 238000005259 measurement Methods 0.000 claims abstract description 22
- 239000007788 liquid Substances 0.000 claims description 42
- 238000001816 cooling Methods 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 10
- 230000006835 compression Effects 0.000 claims description 7
- 238000007906 compression Methods 0.000 claims description 7
- 230000000977 initiatory effect Effects 0.000 claims description 5
- 239000007791 liquid phase Substances 0.000 claims 2
- 239000012071 phase Substances 0.000 claims 1
- 238000005191 phase separation Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 6
- 238000001514 detection method Methods 0.000 description 4
- 238000001704 evaporation Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 238000005057 refrigeration Methods 0.000 description 4
- 238000011144 upstream manufacturing Methods 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000010339 dilation Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000006200 vaporizer Substances 0.000 description 1
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
- F25B49/005—Arrangement or mounting of control or safety devices of safety devices
-
- 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
-
- 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
- F25B2339/00—Details of evaporators; Details of condensers
- F25B2339/04—Details of condensers
- F25B2339/044—Condensers with an integrated receiver
-
- 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
- F25B2500/19—Calculation of parameters
-
- 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
- F25B2500/22—Preventing, detecting or repairing leaks of refrigeration fluids
- F25B2500/222—Detecting refrigerant leaks
-
- 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
- F25B2700/2115—Temperatures of a compressor or the drive means therefor
- F25B2700/21151—Temperatures of a compressor or the drive means therefor at the suction side of the compressor
-
- 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
- F25B2700/2115—Temperatures of a compressor or the drive means therefor
- F25B2700/21152—Temperatures of a compressor or the drive means therefor at the discharge side of the compressor
-
- 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
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
- F25B2700/2117—Temperatures of an evaporator
- F25B2700/21174—Temperatures of an evaporator of the refrigerant at the inlet of the evaporator
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
- Air Conditioning Control Device (AREA)
Abstract
A kind of refrigerating circuit (1a) includes on the flow direction of circulating refrigerant：Compressor unit (2), it is used to compress the refrigerant；Condenser (4)；And at least one evaporator (10), it has the expansion gear (6) for being connected thereto trip.The refrigerating circuit (1a) also includes：Sub-cooled temperature sensor (6), it is located at the temperature that the refrigerant of the condenser (4) is left in the exit of the condenser (4) for measurement；Control unit (12), it is functionally connected to the sub-cooled temperature sensor (6), and is configured for detecting the leakage in the refrigerating circuit (1a) by the refrigerant temperature of the sub-cooled temperature sensor (6) measurement.The condenser (4) includes：Liquefaction portion (4a), it is arranged to make the refrigerant liquefy at least in part；And subsequent sub-cooled part (4b), it is arranged to sub-cooled and stores liquefied refrigerant, and the outlet of the outlet of the condenser (4), specifically the sub-cooled part (4b), the expansion gear (8) of at least one evaporator (10) is connected to by the connecting line (7) without receiver.
Description
The present invention relates to a kind of refrigerating circuit, and more particularly to a kind of refrigeration of the device including for leak detection
Loop.
Include compressor unit, at least one condenser for compression refrigerant on the flow direction of circulating refrigerant
Refrigerating circuit with least one evaporator (having the expansion gear for being connected thereto trip) is well known in the art.
In order to allow refrigerating circuit effectively to operate, it is necessary to optimal refrigerant charge.This optimal charging amount is with environmental condition
(such as environment temperature) and cooling capacity (such as quantity by cooling cabinet/refrigerating chamber of supply) and change.In order to all
Corresponding optimal charging amount, the commonly provided refrigerant receiver (or buffer) are ensured under possible environmental condition.The refrigerant
The current unwanted excess liquid refrigerant of institute of the Optimum Operation of receiver storage system, and if necessary to more refrigerants or
If system loses refrigerant due to leakage, liquid refrigerant is released back into system.The receiver is generally equipped with
For detecting the device for the liquid level being stored in receiver, such as liquid level sensor.Refrigerant due to leakage and
In the case of loss, the level one for the refrigerant being stored in receiver falls below predetermined minimum liquid level, liquid level
Sensor is provided with alarm signal.However, because the amount of the refrigerant included by system is usually noticeably greater than in most of operations
Under the conditions of needed for refrigerant amount, so system can lose before reaching predetermined minimum refrigerant level and initiating alarm
A large amount of refrigerants.
Therefore by it is beneficial that provide a kind of refrigerating circuit for including improved leak detecting device, the improved leakage
Detection means allows the early stage in leakage to detect refrigerating circuit or even very little leakage.
Further it is beneficial that provide it is a kind of can low cost produce and operate and take the refrigeration of only little space
Loop.
A kind of refrigerating circuit in accordance with an exemplary embodiment of the invention includes on the flow direction of circulating refrigerant：
Compressor unit for compression refrigerant；Condenser；And at least one evaporator, it has the expansion for being connected thereto trip
Device；Refrigerating circuit also includes：Sub-cooled temperature sensor, it is located at the exit of condenser and leaves condensation for measurement
The temperature of the refrigerant of device；Control unit, it is functionally connected to sub-cooled temperature sensor and is configured for
Leakage in refrigerating circuit is detected by the refrigerant temperature of sub-cooled temperature sensor measurement, wherein condenser includes：Liquid
Change part, it is arranged to make refrigerant liquefy at least in part；And subsequent sub-cooled part, it is arranged to
Sub-cooled simultaneously stores liquefied refrigerant；The wherein outlet of the outlet of condenser, specifically sub-cooled part, by without connecing
The connecting line for receiving device is connected to the expansion gear of at least one evaporator.Sub-cooled part is directly connected to liquefaction portion,
I.e. in the case of without the other device being arranged between liquefaction portion and sub-cooled part, or simply by means of such as by reference
The gas-liquid separator that Fig. 3 is described in detail.
A kind of method that is used to detect the leakage in refrigerating circuit of other exemplaries according to the present invention
Comprise the following steps：Compression refrigerant；Refrigerant is set to be liquefied at least in part in the liquefaction portion of condenser；Make at least partly
Liquefied refrigerant flow to the subsequent sub-cooled part of condenser from liquefaction portion；In the sub-cooled part of condenser
Middle sub-cool agent；By directly, without receiver in a manner of, by refrigerant from the outlet of condenser, specifically low temperature
The outlets direct of cooling segment is to the expansion gear of at least one evaporator, and evaporated refrigerant；Methods described also includes following
Step：The temperature of the liquid refrigerant of the sub-cooled part of condenser is left in measurement；And based on being passed by sub-cooled temperature
The fluid temperature of sensor measurement detects the leakage in refrigerating circuit.At least partly liquefied refrigerant is guided directly into liquefaction
Part, i.e., in the case of without the other device being arranged between liquefaction portion and sub-cooled part, or simply by means of such as
The gas-liquid separator for separating gaseous parts with liquid portion that reference picture 3 is described in detail.
The exemplary of the present invention is described in detail referring to the drawings, in the drawing：
Fig. 1 shows the schematic diagram of the refrigerating circuit of the first exemplary according to the present invention.
Fig. 2 shows the schematic diagram of the refrigerating circuit of the second exemplary according to the present invention.
Fig. 3 shows the schematic diagram of the refrigerating circuit of the 3rd exemplary according to the present invention.
Fig. 1 shows the refrigerating circuit 1a of the first exemplary according to present invention schematic diagram.
Refrigerating circuit 1a includes on the flow direction of the circulating refrigerant indicated by arrow A：Compressor unit, it includes
At least one compressor 2 for compression refrigerant；At least one condenser 4；And at least one evaporator 10, it, which has, connects
Connect corresponding expansion gear 8 at its upstream.
At least one condenser 4 includes：Upstream side liquefaction portion 4a, its be fluidly connected to the outlet of compressor 2 and by with
The refrigerant for making to be supplied by compressor 2 is put to liquefy at least in part；And subsequent downstream sub-cooled part 4b, its
It is arranged to sub-cooled and stores via the liquefied refrigerants of liquefaction portion 4a of condenser 4.Liquefaction portion 4a's goes out
Mouth be directly connected to liquefaction portion 4b, i.e. liquefaction portion 4a and sub-cooled part 4b and be integral with each other and/or by means of
Connecting line connection without receiver so that liquefied refrigerant is directly flow to from liquefaction portion 4a in liquefaction portion 4a
In the 4b of sub-cooled part.The outlet of condenser 4, specifically sub-cooled part 4b outlet, by means of without receiver
Connecting line 7 is fluidly connected to the expansion gear 8 of at least one evaporator 10 so that liquefaction and sub-cooled refrigerant directly,
I.e. from sub-cooled part, 4b is flow in expansion gear 8 in the case of without receiver, without by another dress
Put, specifically need not move through receiver.
The sub-cooled part 4b of condenser 4 is not only configured for cryogenic liquid refrigerant, and for storing
Refrigerating circuit 1a operates the unwanted any excess liquid refrigerant of institute under current environmental condition, to meet actual cooling need
Ask.Therefore, in contrast to the prior art, it is not necessary to provide a store for the other receiver of superfluous refrigerant.
Sub-cooled temperature sensor 6 is arranged on the sub-cooled part 4b of condenser 4 exit, is left to measure
The liquefaction of condenser 4 and the temperature of the refrigerant of sub-cooled.
The expansion gear 8 expanded for the refrigerant for making liquefaction and sub-cooled is arranged on sub-cooled temperature sensor 6
Downstream.The expanding refrigerant for leaving expansion gear 8 is delivered to the outlet for being fluidly coupled to expansion gear 8 and at least one pressure
At least one evaporator 10 between the entrance of contracting machine 2.In at least one evaporator 10, refrigerant is evaporated, so as to
The cooling capacity of refrigerating circuit 1a needed for providing.
In Fig. 1 in shown exemplary, only single compressor 2, single condenser 4, single is shown respectively
Expansion gear 8 and single evaporator 10；However, technical staff will readily appreciate that：If necessary or desired, it is possible to provide multiple described
Every kind of device in device 2,4,8,10.Such as, it is possible to provide include multiple evaporators 10 of associated expansion gear 8 respectively, with
Just multiple radiators are provided, the multiple radiator is arranged in many refrigerated goods display cases for example in supermarket.
Sub-cooled temperature sensor 6 is functionally for example electrically coupled to control unit 12, the quilt of described control unit 12
Monitoring is configured to be grasped as leak detection system by the temperature signal that sub-cooled temperature sensor 6 provides
Make.Specifically, control unit 12 can be configured to the actual temperature signal that will be provided by sub-cooled temperature sensor 6 with it is pre-
Constant temperature degree is compared, and the predetermined temperature is counted by means of the calculating that is arranged in control unit 12 and/or memory cell 14
Calculate and/or store.
If control unit 12 detects that refrigerant leaks from refrigerating circuit 1a, then it is by means of being functionally connected to control
At least one appropriate alarm device 16,18 of unit 12 processed initiates alarm, such as optics and/or acoustic alert.Additionally
Or alternately, control unit 12 can stop the operation of compressor 2, to avoid further loss refrigerant.Alternately, may be used
Make the deceleration-operation of compressor 2, to provide at least part of refrigerating capacity in the case where not losing too many refrigerant.
Calculate and/or memory cell 14 can be based on by least one temperature that temperature sensor 20,22,24,26 measures in addition
Degree calculates predetermined temperature or selection is by the predetermined temperature compared with the temperature of measurement from multiple storage values, and described at least one
Individual temperature sensor 20,22,24,26 in addition includes such as air temperature sensor 20 and/or is arranged on refrigerating circuit 1a
Farther opening position for measure the refrigerant temperature sensors 22 of the temperature of refrigerant circulated in refrigerating circuit 1a,
24、26。
The calculating and/or selection of predetermined temperature can also be based on external value, such as via operating personnel by means of being connected to
The required cooling capacity that the input unit 28 of control unit 12 inputs.
Carry out having kept constant refrigeration for the overheat at wherein evaporating temperature, evaporator 10 and cooling capacity
The example calculation in loop：
- 10 DEG C of evaporating temperature
Cross hot vaporizer 10K
Cooling capacity 100kW
In the first step, influence of the environment temperature to sub-cooled under constant refrigerant charge on inspection：
1. initial fill amount：
Input：
Refrigerant charge 23.4kg
Environment temperature Tamb35℃
Output：
Sub-cooled temperature Tsub 3K
2. the change of environment temperature：
Input：
Refrigerant charge 23.4kg
Environment temperature Tamb 25℃
Output：
Sub-cooled temperature Tsub 4.7K
That is, environment temperature TambFor Δ Tamb=-10 DEG C of reduction causes the sub-cooled temperature measured by temperature sensor 6
TsubFor Δ Tsub=+1.7K increase (from 3K to 4.7K).
In the second step, the evaluated charging amount under constant ambient temperature loses the influence to sub-cooled temperature：
1. initial fill amount
Input：
Environment temperature Tamb 25℃
Refrigerant charge 23.4kg
Output：
Sub-cooled Tsub 4.7K
2.5% charging amount loss (=1.17kg)
Input：
Environment temperature Tamb 25℃
Refrigerant charge 22.21kg
Output：
Sub-cooled Tsub 3.6K
Therefore, Δ be present between 4.7K expectation sub-cooled temperature and 3.6K actual measurement sub-cooled temperature
TsubLoss of refrigerant in systems be present in=1.1K difference, this instruction.
Perform many measuring and calculations or even can allow by the way that (calculating) will it is expected and the sub-cooled temperature that actually measures
TsubIt is compared to determine the amount of loss of refrigerant.
Fig. 2 shows the refrigerating circuit 1b of the second exemplary according to present invention schematic diagram.
Included according to the refrigerating circuit 1b of the second embodiment essentially identical with the refrigerating circuit 1a of the first embodiment
Part, i.e., include on the flow direction such as by the arrow A circulating refrigerants indicated：Compressor unit, it includes being used to compress
At least one compressor 2 of refrigerant；Condenser 4；And at least one evaporator 10a, 10b, it, which has, is connected thereto trip
Corresponding expansion gear 8a, 8b.With the complete phase of corresponding component of the refrigerating circuit 1a according to the first embodiment shown in Fig. 1
The same refrigerating circuit 1b according to the second embodiment part is marked with identical reference symbol, and will no longer be carried out in detail
Discuss.
According to the present invention the second exemplary refrigerating circuit 1b include two or more evaporators 10a,
10b, it has corresponding expansion gear 8a, the 8b for being connected to each evaporator 10a, 10b upstream, the wherein outlet of condenser 4, tool
It is sub-cooled part 4b outlet body, two or more evaporators 10a, 10b is connected to by the connecting line 7 without receiver
Corresponding expansion gear 8a, 8b, the connecting line 7 of the no receiver is branched off into be connect with corresponding expansion gear 8a, 8b nothing being connected
Receive branch line 9a, 9b of device.
Refrigerant temperature sensors 22,23 may be arranged at is connected to accordingly associated evaporator by expansion gear 8a, 8b
At each in 10a, 10b pipeline.
Each expansion gear 8a, 8b can be arranged between open mode and closed mode can to switch changeable swollen
Swollen device 8a, 8b, in open mode, it expands the refrigerant that is circulated in refrigerating circuit 1b, in off position in, it hinders
Disconnected refrigerant flows through associated evaporator 10a, 10b, so as to allow optionally to activate and deactivate each evaporation
Device 10a, 10b operation.
Can be adjustable by expansion gear 8a, 8b dilation provided as another option.
It is also possible to using single common expansion gear 8 for expanding refrigerant is delivered into two or more evaporations
Device 10a, 10b.
Fig. 3 shows the refrigerating circuit 1c of the 3rd exemplary according to present invention schematic diagram.
Included according to the refrigerating circuit 1c of the 3rd embodiment essentially identical with the refrigerating circuit 1a of the first embodiment
Part, i.e., include on the flow direction such as by the arrow A circulating refrigerants indicated：Compressor unit, it includes being used to compress
The compressor 2 of refrigerant；Condenser 40；And evaporator 10, it has the corresponding expansion gear 8 for being connected thereto trip.With Fig. 1
Shown in the refrigerating circuit 1a according to the first embodiment the identical system according to the 3rd embodiment of corresponding component
Cold loop 1c part is marked with identical reference symbol, and will be no longer discussed in detail.
It is according to the difference of the condenser 40 of the 3rd embodiment and the condenser 4 of the first embodiment：Cold
Gas-liquid separator 42 is provided between the liquefaction portion 40a of condenser 40 and subsequent sub-cooled part 40b.
Gas-liquid separator 42 is arranged to separate the gas part of gas-liquid mixture with liquid portion, in liquefaction portion
40a condensing capacity is not enough to all gaseous refrigerants for condensing the liquefaction portion 40a that condenser 40 is delivered to from compressor 2
In the case of agent, the gas-liquid mixture leaves the liquefaction portion 40a of condenser 40.In the 3rd embodiment, gas-liquid mixed
The liquid portion of thing is delivered to the sub-cooled part 40b of condenser 40 for sub-cooled and storage, as in Fig. 1
It is the same in the first shown embodiment, and the gas part of the gas-liquid mixture separated is passed by means of gas backstreaming line 44
Send back to liquefaction portion 40aEntrance, so as to again through liquid part 40a so as to being also liquefied.
Therefore, in the refrigerating circuit 1c according to the 3rd embodiment, only liquefied refrigerant is delivered to condenser 40
Sub-cooled part 40b, this improves sub-cooled part 40b efficiency.This lifting refrigerating circuit 1c efficiency, because in root
In refrigerating circuit 1b according to the 3rd embodiment, no gaseous refrigerant leaves condenser 40 and enters at least one expansion gear
In 8.
A kind of refrigerating circuit in accordance with an exemplary embodiment of the invention includes on the flow direction of circulating refrigerant：
Compressor unit, it is used for compression refrigerant；At least one condenser；And at least one evaporator, it, which has, is connected to it
The expansion gear of upstream.Condenser includes：Liquefaction portion, it is arranged to make refrigerant liquefy at least in part；And with
Sub-cooled part afterwards, it is arranged to sub-cooled and stores liquefied refrigerant.The outlet of liquefaction portion is by means of nothing
The connecting line of receiver is connected to sub-cooled part so that liquefied refrigerant directly, i.e. in the case of without receiver
It is flow to from liquefaction portion in sub-cooled part.The outlet of the outlet of condenser, specifically sub-cooled part, by means of
Directly, specifically the connecting line without receiver is connected to the expansion gear of at least one evaporator so that leaves condenser
The refrigerant of liquefaction and sub-cooled is flow in expansion gear from sub-cooled part, without passing through another device, tool
Need not move through receiver body.
A kind of method for being used to detect leakage in refrigerating circuit in accordance with an exemplary embodiment of the invention include with
Lower step：Compression refrigerant；Refrigerant is set to be liquefied at least in part in the liquefaction portion of condenser；Will be at least partly liquefied
Refrigerant is directed to the sub-cooled part then immediately of condenser from liquefaction portion；In the sub-cooled part of condenser
Sub-cool agent；By directly, i.e. without receiver in a manner of, by refrigerant from the outlet of condenser, specifically low temperature
The outlets direct of cooling segment is to the expansion gear of at least one evaporator, and evaporated refrigerant.Methods described also includes following
Step：The temperature of the liquid refrigerant of the sub-cooled part of condenser is left in measurement；And based on being passed by sub-cooled temperature
The fluid temperature of sensor measurement detects the leakage in refrigerating circuit.
Refrigerating circuit in accordance with an exemplary embodiment of the invention also includes：Sub-cooled temperature sensor, it is located at
The exit of condenser and the temperature for being arranged to measure the refrigerant for the sub-cooled part for leaving condenser；And control
Unit processed, it is functionally connected to temperature sensor and is configured for the refrigerant temperature by temperature sensor measurement
To detect the leakage in refrigerating circuit.
In accordance with an exemplary embodiment of the invention, measure and monitoring leaves condenser and specifically leaves condenser
The temperature of the liquefied refrigerant of sub-cooled part allows refrigerant that is highly reliable and detecting even very little exactly from refrigeration
The loss in loop.Therefore any refrigerant leakage can be reliably detected in the early stage of leakage, even if in the loop still
In the presence of a large amount of refrigerants, and a large amount of refrigerants of avoidable loss.
Because refrigerating circuit in accordance with an exemplary embodiment of the invention does not include receiver, save for providing
The cost of this receiver and space.Therefore, cold loop can low cost produce and operate and only only take up little space.
In one embodiment, control unit includes being arranged to by the temperature of sub-cooled temperature sensor measurement
Spend the comparing unit compared with least one predetermined value.By by the temperature of sub-cooled temperature sensor measurement and at least one
Individual predetermined value is compared permission readily and reliably leak detection, and such as in the case where leaking generation, sub-cooled temperature will
Considerably change and deviate with predetermined value.
In one embodiment, control unit includes being arranged to the computing unit for calculating predetermined value.There is provided this
Computing unit allows actual environment based on refrigerating circuit and operating condition to calculate predetermined value.Therefore allowing neatly will be predetermined
The environment and operating condition are arrived in value regulation.
In one embodiment, control unit also includes memory cell, and it is arranged to be computed before storage
At least one predetermined value that is going out and/or being input to from external source in memory cell.Permitted using storage value as predetermined value
Perhaps save the cost for providing computing unit and/or allow to use by means of the mould outside the computer based of precision
The predetermined value that the simulation carried out in plan system is calculated.Alternatively or additionally, can store and before use, specifically in reality
The predetermined value measured during the operation of border system.
In one embodiment, refrigerating circuit includes being functionally connected at least one temperature biography in addition of control unit
Sensor, and control unit is configured to calculate using the temperature value by least one temperature sensor measurement in addition
Predetermined value and/or from it is multiple storage predetermined values in select predetermined value.At least one temperature sensor in addition can be surrounding air
The temperature sensor of the temperature of temperature sensor or the circulating refrigerant being arranged at the diverse location of measurement refrigerating circuit
In one.This allows the temperature for the refrigerant that predetermined value is adjusted into actual environment temperature and/or circulated in refrigerating circuit.
In one embodiment, control unit is configured to stop at least one after the leakage of refrigerating circuit is detected
The operation and/or initiation alarm signal of individual compressor, to avoid the further loss of refrigerant.
In one embodiment, gas-liquid separator is arranged between the liquefaction portion of condenser and sub-cooled part,
The entrance of gas-liquid separator is fluidly connected to the outlet of the liquefaction portion of condenser, the gas outlet stream connection of gas-liquid separator
Liquid outlet to the entrance of the liquefaction portion of condenser, and gas-liquid separator is fluidly connected to the sub-cooled portion of condenser
The entrance divided, so as to which the entrance of gaseous delivery to liquefaction portion is liquefied.This gas-liquid separator allows that condensation will be left
The gas part of the gas-liquid mixture of the liquefaction portion of device separates with liquid portion.Liquid refrigerant is only delivered to sub-cooled
The efficiency of part lifting sub-cooled part and the efficiency of refrigerating circuit.
In one embodiment, there is provided two or more evaporators, it has the corresponding expansion for being connected thereto trip
Device.In the embodiment described in which, the outlet of the outlet of condenser, specifically sub-cooled part, by the company without receiver
Wiring is connected to the corresponding expansion gear of two or more evaporators, and the connecting line of the no receiver, which is branched off into, is connected to phase
Answer the branch line of expansion gear.There is provided multiple evaporators allows to provide multiple radiators at diverse location, such as is being arranged on
In many refrigerated goods display cases operated by single refrigerating circuit in supermarket.
Although describing the present invention with reference to exemplary, it will be understood by those of skill in the art that
In the case of without departing substantially from the scope of the present invention, various changes can be made and equivalent can be used to substitute its element.In addition, not
In the case of the base region of the present invention, modification can be made to make concrete condition or material adapt to the religious doctrine of the present invention.Cause
This, the present invention is not intended to be limited to disclosed specific embodiment, but the present invention will include falling in appended claims
All embodiments in the range of book.
Reference numeral row Yuan
1a, 1b, 1c refrigerating circuit
2 compressor units
4th, 40 condenser
4a, 40a liquefaction portion
4b, 40b sub-cooled part
6 sub-cooled temperature sensors
7 connecting lines without receiver
8th, 8a, 8b expansion gear
9a, 9b branch line
10th, 10a, 10b evaporator
12 control units
14 calculating and/or memory cell
16 acoustic alert devices
18 optical alert devices
20 air temperature sensors
22nd, 23,24,26 refrigerant temperature sensors
28 input units
42 gas-liquid separators
44 gas backstreaming lines
Claims (25)
1. refrigerating circuit (1a；1b；1c), it includes on the flow direction of circulating refrigerant：
Compressor unit (2), it is used to compress the refrigerant；
Condenser (4,40)；And
At least one evaporator (10；10a, 10b), it has the expansion gear (6) for being connected thereto trip；
Refrigerating circuit (the 1a；1b；1c) also include：
Sub-cooled temperature sensor (6), its be located at the exit of the condenser (4,40) for measurement leave it is described cold
The temperature of the refrigerant of condenser (4,40)；
Control unit (12), it is functionally connected to the sub-cooled temperature sensor (6), and is configured for by institute
The refrigerant temperature for stating sub-cooled temperature sensor (6) measurement detects the refrigerating circuit (1a；1b；Leakage in 1c)；
Wherein described condenser (4,40) includes：Liquefaction portion (4a, 40a), it is arranged to make the refrigerant at least portion
Divide ground liquefaction；And subsequent sub-cooled part (4b, 40b), it is arranged to sub-cooled and stores liquefied refrigerant；
And
The outlet of the outlet of wherein described condenser (4,40), specifically the sub-cooled part (4b, 40b), lead to
The connecting line (7) for crossing no receiver is connected at least one evaporator (10；10a, 10b) the expansion gear (8；8a、
8b)；
Wherein, by the temperature measured at the condensator outlet compared with predetermined temperature, the predetermined temperature is based on measurement
Environment temperature or desired cooling capacity calculate.
2. refrigerating circuit (1a according to claim 1；1b；1c), wherein, the sub-cooled part (4b, 40b) and institute
Liquefaction portion (4a, 40a) is stated in the case where being disposed there between without another device or only by means of gas-liquid separator (42) to connect
Connect.
3. refrigerating circuit (1a according to claim 1；1b；1c), wherein described control unit (12) includes being configured to use
In comparing unit of the temperature that will be measured by the sub-cooled temperature sensor (6) compared with predetermined value.
4. refrigerating circuit (1a according to claim 2；1b；1c), wherein described control unit (12) includes being configured to use
In comparing unit of the temperature that will be measured by the sub-cooled temperature sensor (6) compared with predetermined value.
5. refrigerating circuit (1a according to claim 3；1b；1c), wherein described control unit (12) also includes being configured
For calculating the computing unit of the predetermined value.
6. refrigerating circuit (1a according to claim 4；1b；1c), wherein described control unit (12) also includes being configured
For calculating the computing unit of the predetermined value.
7. according to the refrigerating circuit (1a described in claim 3,4,5 or 6；1b；1c), wherein described control unit (12) also includes
It is arranged to store the memory cell of at least one predetermined value.
8. refrigerating circuit (the 1a according to claim 5 or 6；1b；1c), it also includes being functionally connected to the control list
At least one temperature sensor (20,22,23,24,26), the wherein described control unit (12) in addition of first (12) are arranged to
Institute is calculated and/or selects using by the temperature value that temperature sensor (20,22,23,24,26) measures at least one in addition
State predetermined value.
9. refrigerating circuit (1a according to claim 7；1b；1c), it also includes being functionally connected to described control unit
(12) at least one temperature sensor (20,22,23,24,26), wherein described control unit (12) in addition is arranged to make
Described in being calculated and/or being selected by the temperature value that temperature sensor (20,22,23,24,26) measures at least one in addition
Predetermined value.
10. refrigerating circuit (1a according to claim 8；1b；1c), wherein at least one other temperature sensor
(20,22,23,24,26) are air temperature sensor (20) and are arranged to measurement in the refrigerating circuit (1a；1b；
It is at least one in the temperature sensor (22,23,24,26) of the temperature of the refrigerant of circulation in 1c).
11. refrigerating circuit (1a according to claim 9；1b；1c), wherein at least one other temperature sensor
(20,22,23,24,26) are air temperature sensor (20) and are arranged to measurement in the refrigerating circuit (1a；1b；
It is at least one in the temperature sensor (22,23,24,26) of the temperature of the refrigerant of circulation in 1c).
12. refrigerating circuit (the 1a according to any one of claim 5 to 6；1b；1c), wherein described control unit (12)
It is configured to reduce after the leakage of the refrigerating circuit is detected or even stop the behaviour of at least one compressor (2)
Make and/or initiate alarm signal.
13. refrigerating circuit (1a according to claim 7；1b；1c), wherein described control unit (12) is configured to examining
The leakage for measuring the refrigerating circuit reduces or even stopped the operation and/or initiation of at least one compressor (2) afterwards
Alarm signal.
14. refrigerating circuit (1a according to claim 8；1b；1c), wherein described control unit (12) is configured to examining
The leakage for measuring the refrigerating circuit reduces or even stopped the operation and/or initiation of at least one compressor (2) afterwards
Alarm signal.
15. refrigerating circuit (1a according to claim 9；1b；1c), wherein described control unit (12) is configured to examining
The leakage for measuring the refrigerating circuit reduces or even stopped the operation and/or initiation of at least one compressor (2) afterwards
Alarm signal.
16. refrigerating circuit (1a according to claim 10；1b；1c), wherein described control unit (12) is configured to
Detect that the leakage of the refrigerating circuit reduces or even stopped operation and/or the hair of at least one compressor (2) afterwards
Play alarm signal.
17. refrigerating circuit (1a according to claim 11；1b；1c), wherein described control unit (12) is configured to
Detect that the leakage of the refrigerating circuit reduces or even stopped operation and/or the hair of at least one compressor (2) afterwards
Play alarm signal.
18. according to the refrigerating circuit any one of preceding claims 1-6, wherein, gas-liquid separator (42) is disposed in
Between the liquefaction portion (4a, 40a) of the condenser (4,40) and the sub-cooled part (4b, 40b), the gas-liquid
The entrance of separator (42) is fluidly connected to the outlet of the liquefaction portion (4a, 40a) of the condenser (4,40).
19. refrigerating circuit according to claim 18, wherein the gas outlet stream of the gas-liquid separator (42) even
Be connected to the entrance of the condenser (4,40), and the liquid outlet of wherein described gas-liquid separator (42) be fluidly connected to it is described
The entrance of the sub-cooled part (4b, 40b) of condenser (4,40).
20. according to the refrigerating circuit any one of preceding claims 1-6, wherein, there is provided two or more evaporators
(10a, 10b), it, which has, is connected thereto the corresponding expansion gear (8a, 8b) of trip, and wherein described condenser (4,40)
The outlet of the outlet, specifically the sub-cooled part (4b, 40b), is connected by the connecting line (7) without receiver
To described two or more evaporators (10；10a, 10b) the corresponding expansion gear (8a, 8b), the no receiver
Connecting line (7) is branched off into the branch line (9a, 9b) without receiver for being connected to the corresponding expansion gear (8a, 8b).
21. for detecting refrigerating circuit (1a；1b；The method of leakage in 1c), it comprises the following steps：
Compression refrigerant；
The refrigerant is set to be liquefied at least in part in the liquefaction portion (4a, 40a) of condenser (4,40)；
It flow to the liquefaction portion (4a, 40a) of the liquefied refrigerant of described at least part from the condenser (4,40)
The subsequent sub-cooled part (4b, 40b) of the condenser (4,40)；
The refrigerant described in sub-cooled in the sub-cooled part (4b, 40b) of the condenser (4,40)；
In a manner of without receiver, by the refrigerant from the outlet of the condenser (4,40), the specifically low temperature cold
But the outlets direct of part (4b, 40b) is at least one evaporator (10；10a, 10b) expansion gear (8；8a, 8b), and steam
Send out refrigerant described；
Methods described is further comprising the steps of：
The temperature of the liquid refrigerant of the sub-cooled part (4b, 40b) of the condenser (4,40) is left in measurement；And
It is compared to examine with predetermined temperature based on the liquid refrigerant temperature measured by the sub-cooled temperature sensor (6)
Survey the refrigerating circuit (1a；1b；Leakage in 1c), the predetermined temperature environment temperature based on measurement or desired cooling energy
Power calculates.
22. according to the method for claim 21, wherein the liquefied refrigerant of described at least part is from the liquefaction portion
(4a, 40a) is directed into the sub-cooled part (4b, 40b), without by addition to optional gas-liquid separator (42)
Another device.
23. according to the method for claim 21, wherein the refrigerant by directly, the connecting line (7) without receiver from
The outlet of the condenser (4), the specifically outlet of the sub-cooled part (4b) be directed into two or
More evaporators (10a, 10b), described two or more evaporators (10a, 10b), which have, is connected thereto the corresponding swollen of trip
Swollen device (8a, 8b), the connecting line (7) of the no receiver are branched off into the nothing for being connected to the corresponding expansion gear (8a, 8b)
The branch line (9a, 9b) of receiver.
24. according to the method for claim 22, wherein the refrigerant by directly, the connecting line (7) without receiver from
The outlet of the condenser (4), the specifically outlet of the sub-cooled part (4b) be directed into two or
More evaporators (10a, 10b), described two or more evaporators (10a, 10b), which have, is connected thereto the corresponding swollen of trip
Swollen device (8a, 8b), the connecting line (7) of the no receiver are branched off into the nothing for being connected to the corresponding expansion gear (8a, 8b)
The branch line (9a, 9b) of receiver.
25. the method according to any one of claim 21 to 24, its is further comprising the steps of：Will be at least partly liquefied
The gas phase and liquid phase separation of refrigerant；The liquid phase is delivered to the sub-cooled part (40b) of the condenser (40)
And by the liquefaction portion (40a) of the gaseous delivery to the condenser (40).
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/EP2013/061099 WO2014191035A1 (en) | 2013-05-29 | 2013-05-29 | Refrigeration circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105431692A CN105431692A (en) | 2016-03-23 |
| CN105431692B true CN105431692B (en) | 2018-01-02 |
Family
ID=48539158
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201380077073.4A Expired - Fee Related CN105431692B (en) | 2013-05-29 | 2013-05-29 | Refrigerating circuit |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20160109170A1 (en) |
| EP (1) | EP3004756B1 (en) |
| CN (1) | CN105431692B (en) |
| WO (1) | WO2014191035A1 (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107850356B (en) * | 2015-07-01 | 2020-12-08 | 特灵空调***(中国)有限公司 | Heat recovery system with liquid separator application |
| WO2017006462A1 (en) * | 2015-07-08 | 2017-01-12 | 三菱電機株式会社 | Air conditioner |
| DE102016110585A1 (en) * | 2016-06-08 | 2017-12-14 | Truma Gerätetechnik GmbH & Co. KG | Air conditioning system and leak detection method in an air conditioning system |
| US11060775B2 (en) | 2017-03-09 | 2021-07-13 | Lennox Industries Inc. | Method and apparatus for refrigerant leak detection |
| CN110375468B (en) | 2018-04-13 | 2022-10-11 | 开利公司 | Air-cooled heat pump system, and refrigerant leakage detection method and detection system for same |
| CN110375466B (en) | 2018-04-13 | 2022-10-28 | 开利公司 | Device and method for detecting refrigerant leakage of air source heat pump system |
| US11287153B2 (en) * | 2019-12-02 | 2022-03-29 | Lennox Industries Inc. | Method and apparatus for risk reduction during refrigerant leak |
| JP6793862B1 (en) * | 2020-01-14 | 2020-12-02 | 三菱電機株式会社 | Refrigeration cycle equipment |
| JP7260806B2 (en) * | 2021-04-27 | 2023-04-19 | ダイキン工業株式会社 | Air conditioning system, operation control method thereof, and operation control device for air conditioning system |
| JP7112008B1 (en) * | 2021-05-21 | 2022-08-03 | ダイキン工業株式会社 | refrigeration cycle equipment |
| CN113701410B (en) * | 2021-09-09 | 2022-08-26 | 珠海格力电器股份有限公司 | Refrigerating unit and refrigerant quantity control method and device thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1320794A (en) * | 2000-04-26 | 2001-11-07 | 株式会社电装 | Refrigerant circulation system |
| CN103148642A (en) * | 2011-12-07 | 2013-06-12 | 现代自动车株式会社 | Condenser for vehicle |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0518639A (en) * | 1991-07-11 | 1993-01-26 | Sanyo Electric Co Ltd | Refrigerator |
| US5802860A (en) * | 1997-04-25 | 1998-09-08 | Tyler Refrigeration Corporation | Refrigeration system |
| EP1360445B1 (en) * | 2001-02-05 | 2007-08-29 | Showa Denko K.K. | Duplex-type heat exchanger and refrigeration system equipped with said heat exchanger |
| US7386985B2 (en) * | 2005-12-05 | 2008-06-17 | Carrier Corporation | Detection of refrigerant charge adequacy based on multiple temperature measurements |
| JP5011957B2 (en) * | 2006-09-07 | 2012-08-29 | ダイキン工業株式会社 | Air conditioner |
| JP4803199B2 (en) * | 2008-03-27 | 2011-10-26 | 株式会社デンソー | Refrigeration cycle equipment |
| JP5664063B2 (en) * | 2010-09-21 | 2015-02-04 | 株式会社デンソー | Condenser |
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2013
- 2013-05-29 WO PCT/EP2013/061099 patent/WO2014191035A1/en active Application Filing
- 2013-05-29 US US14/893,290 patent/US20160109170A1/en not_active Abandoned
- 2013-05-29 EP EP13726194.7A patent/EP3004756B1/en not_active Not-in-force
- 2013-05-29 CN CN201380077073.4A patent/CN105431692B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1320794A (en) * | 2000-04-26 | 2001-11-07 | 株式会社电装 | Refrigerant circulation system |
| CN103148642A (en) * | 2011-12-07 | 2013-06-12 | 现代自动车株式会社 | Condenser for vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2014191035A1 (en) | 2014-12-04 |
| EP3004756B1 (en) | 2018-04-11 |
| EP3004756A1 (en) | 2016-04-13 |
| US20160109170A1 (en) | 2016-04-21 |
| CN105431692A (en) | 2016-03-23 |
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