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CN107752587A - Refrigerated display case, refrigeration system and constant-temperature control method - Google Patents

Refrigerated display case, refrigeration system and constant-temperature control method Download PDF

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Publication number
CN107752587A
CN107752587A CN201610670396.XA CN201610670396A CN107752587A CN 107752587 A CN107752587 A CN 107752587A CN 201610670396 A CN201610670396 A CN 201610670396A CN 107752587 A CN107752587 A CN 107752587A
Authority
CN
China
Prior art keywords
evaporator
refrigerating circuit
suction temperature
display case
refrigerated display
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.)
Pending
Application number
CN201610670396.XA
Other languages
Chinese (zh)
Inventor
张朝昌
傅千里
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Carrier Corp
Original Assignee
Carrier Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Carrier Corp filed Critical Carrier Corp
Priority to CN201610670396.XA priority Critical patent/CN107752587A/en
Priority to EP17751219.1A priority patent/EP3500808A1/en
Priority to PCT/US2017/045112 priority patent/WO2018034846A1/en
Publication of CN107752587A publication Critical patent/CN107752587A/en
Pending legal-status Critical Current

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
    • F25B49/022—Compressor control arrangements
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47F—SPECIAL FURNITURE, FITTINGS, OR ACCESSORIES FOR SHOPS, STOREHOUSES, BARS, RESTAURANTS OR THE LIKE; PAYING COUNTERS
    • A47F3/00—Show cases or show cabinets
    • A47F3/04—Show cases or show cabinets air-conditioned, refrigerated
    • A47F3/0439—Cases or cabinets of the open type
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47F—SPECIAL FURNITURE, FITTINGS, OR ACCESSORIES FOR SHOPS, STOREHOUSES, BARS, RESTAURANTS OR THE LIKE; PAYING COUNTERS
    • A47F3/00—Show cases or show cabinets
    • A47F3/04—Show cases or show cabinets air-conditioned, refrigerated
    • A47F3/0478—Control or safety 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
    • F25B39/00—Evaporators; Condensers
    • F25B39/02—Evaporators
    • 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
    • F25B41/30—Expansion means; Dispositions thereof
    • 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
    • F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
    • F25B47/006—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass for preventing frost
    • 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
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
    • F25D21/04—Preventing the formation of frost or condensate
    • 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
    • F25B2400/22—Refrigeration systems for supermarkets
    • 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
    • F25B2600/00—Control issues
    • F25B2600/02—Compressor control
    • F25B2600/025—Compressor control by controlling speed
    • F25B2600/0251—Compressor control by controlling speed with on-off operation
    • 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
    • F25B2700/19—Pressures
    • F25B2700/197—Pressures of the evaporator
    • 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
    • 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
    • F25B2700/21175—Temperatures of an evaporator of the refrigerant at the outlet of the evaporator

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
  • Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
  • Defrosting Systems (AREA)

Abstract

The present invention provides a kind of refrigerated display case, refrigeration system and constant-temperature control method, and it includes：Refrigerating circuit, it includes compressor, condenser, restricting element and the evaporator being sequentially connected by pipeline；Control device, it is communicated to connect with the refrigerating circuit, and for directly or indirectly controlling the saturated suction temperature of the refrigerating circuit in 2 DEG C to+2 DEG C of predetermined threshold value section；Wherein, the evaporator is finned heat exchanger, and with the fin density not less than 6FPI.The refrigerating circuit can realize generation frosting problem on the fin for while enough refrigerating capacitys are provided for refrigerated display case, avoiding evaporator, and then avoid that white obstruction problem occurs on fin.

Description

Refrigerated display case, refrigeration system and constant-temperature control method
Technical field
The present invention relates to art of refrigeration units, more specifically, it relates to which one kind being capable of thermostatically controlled refrigeration plant.
Background technology
For ease of the fresh-keeping of goods and displaying, refrigerated display case is arisen at the historic moment and has undergone years development.At present, it is existing The refrigerated display case of diversified forms, such as：Island showcase, vertical display case etc..Wherein, most refrigerated display cases are equal It is easy to client to watch and choose the spacial flex of goods for providing one, meanwhile, it needs to provide relative constant temperature for goods Environment, so that it can preserve as permanent as possible.In addition, the isoperibol is usually the environment of relative low temperature, it is therefore desirable to Refrigeration system is equipped with to meet the needs of it is to low temperature environment.
In the refrigerated display case design of routine, the saturated suction temperature of compressor is in -3 DEG C -10 DEG C of scope.Herein In class design, the frosting on the coil pipe or fin of evaporator will occur because saturated suction temperature temperature is relatively low, in system Phenomenon, and it is energy therefore to influence heat exchange.To avoid the heat exchange obstructing problem caused by frosting, it is generally designed to have in evaporator There are relatively low fin density, namely less FPI（For example, fin density<6FPI）, this be due to when spacing of fin is too small, A small amount of frosting is all readily able to cause obstructing problem；In addition, it need to also be defrosted with specific frequency.During defrosting, it will draw Enter outside heat, which results in the waste of energy.In addition, defrosting will also cause the temperature of evaporator lift, and then cause and Air themperature lifting in its refrigerated display case to be exchanged heat, this can have the goods of higher constant temperature requirement to some（For example, Food）In the presence of negative effect.
The content of the invention
Present invention aims at provide a kind of refrigerated display case without defrost.
The object of the invention, which also resides in, provides a kind of refrigeration system without defrost.
The object of the invention, which also resides in, provides a kind of constant-temperature control method.
According to an aspect of the present invention, there is provided a kind of refrigerated display case, it includes：Refrigerating circuit, it includes passing through pipe Compressor, condenser, restricting element and the evaporator that road is sequentially connected；Control device, it is communicated to connect with the refrigerating circuit, And for directly or indirectly by predetermined threshold value section of the saturated suction temperature control of the refrigerating circuit at -2 DEG C to+2 DEG C It is interior；Wherein, the evaporator is finned heat exchanger, and with the fin density not less than 6FPI.
According to another aspect of the present invention, a kind of refrigeration system is also provided, it includes：Refrigerating circuit, it includes passing through Compressor, condenser, restricting element and the evaporator that pipeline is sequentially connected；Control device, itself and the refrigerating circuit communication link Connect, and for directly or indirectly by predetermined threshold value area of the saturated suction temperature control of the refrigerating circuit at -2 DEG C to+2 DEG C In；Wherein, the evaporator is finned heat exchanger, and with the fin density not less than 6FPI.
According to a further aspect of the invention, a kind of constant-temperature control method is also provided, it includes：Parameters acquiring procedure S100, obtain the monitoring parameters for the saturated suction temperature for directly or indirectly reacting refrigerating circuit；Comparison step S200, it will monitor Parameter is compared with monitoring parameters preset value；Rate-determining steps S300, based on comparative result come directly or indirectly by the system The saturated suction temperature of cold loop is controlled in -2 DEG C to+2 DEG C of predetermined threshold value section.
Brief description of the drawings
Fig. 1 is the schematic diagram of the refrigerated display case with one embodiment of the present of invention.
Fig. 2 is the schematic diagram for having the refrigerating circuit in the refrigerated display case of one embodiment of the present of invention.
Embodiment
Accompanying drawing 1 shows a kind of refrigerated display case 100, and it includes：For providing the refrigeration of refrigerating capacity for goods to be saved Loop 110 and for providing thermostatically controlled control device for the refrigerating circuit 110., should with the help of the control device Refrigerating circuit 110 can realize the wing for while enough refrigerating capacitys are provided for refrigerated display case 100, avoiding evaporator 114 Frosting problem occurs on piece, and then avoids that white obstruction problem occurs on fin.
Specifically, as shown in Fig. 2 the refrigerating circuit 110 includes compressor 111, the condensation being sequentially connected by pipeline Device 112, restricting element 113 and evaporator 114.In addition, also including control device, it is communicated to connect with the refrigerating circuit 110, And for directly or indirectly by predetermined threshold value area of the saturated suction temperature control of the refrigerating circuit 110 at -2 DEG C to+2 DEG C In.Wherein, evaporator 114 is finned heat exchanger, and with the fin density not less than 6FPI.Now, due to freezing back The saturated suction temperature on road 110 is controlled in -2 DEG C to+2 DEG C, relative to existing -3 DEG C to -10 DEG C of conventional design scope Speech, the refrigerating circuit 110 has higher saturated suction temperature, that is, the refrigerating circuit 110 is less prone to frosting.Similarly, Due to its higher saturated suction temperature, therefore the refrigerating capacity that can be brought on monolithic fin is also relatively reduced.Now, this structure Want by further improving the fin density of evaporator 114, namely be designed to the fin density not less than 6FPI, to change The overall refrigerant amount of kind evaporator 114, it is equally reached it and uses required scope.Accordingly, due to saturation air-breathing The increase of temperature, the generation of frosting problem will not also be caused again because of the diminution of spacing of fin by being now further added by fin density. In summary, this conception keep refrigerated display case 100 effectively work refrigerating capacity it is constant in the case of, on the one hand avoid frosting The generation of problem, therefore the temperature that it also avoid occurring by defrost rises sharply rapid drawdown problem, improves the goods for needing constant temperature to preserve Quality.On the other hand, the defrost branch road that need to be additionally configured by defrost and one be additionally provided by defrost are also eliminated Divide heat, and then reduce parts cost and energy loss.
As follows by displaying to each component in previous embodiment or integrally-built further improvement.
Alternatively, for the fin density of evaporator 114, one group of specific design example is provided herein.For example, should The fin density applied in embodiment is in 6-25FPI（fins per inches）Between.This allow for it is too intensive will The windage for flowing through air-flow is greatly increased, is unfavorable for exchanging heat on the contrary.Therefore, scope provided above is more closed after actual measurement The scope of reason.More specifically, the fin density of evaporator 114 substantially 11FPI.What " substantially " described herein represented is pair A kind of adaptability of existing deviation between Theoretical Design and actual configuration.For example, in some cases, although wanting design It is that the fin density of evaporator 114 is 11FPI, but the problems such as due to its machining accuracy, design deviation, causes what practical situation occurred It is 11.3FPI or 10.9FPI.Now, still it is considered as it and meets fin density substantially 11FPI situation.
Alternatively, control device herein can use frequency converter 120, the operating frequency that it can be to frequency-changeable compressor 111 Rate, namely running speed, are controlled, and it is could be adjusted to saturated suction temperature control in rational scope.
Alternatively, the control device should be controlled based on the parameter that it gets to saturated suction temperature.The ginseng Number is not specifically for a certain parameter, as long as it can reflect the current state of saturated suction temperature and variation tendency.
For example, under an example, the refrigerated display case 100 also includes the evaporating pressure for detecting evaporator 114 Pressure sensor 115；Control device can the relation based on evaporating pressure and saturated suction temperature come indirectly by refrigerating circuit 110 Saturated suction temperature control in predetermined threshold value section.Further, more accurately and easily to obtain the parameter, will can press Force snesor 115 is arranged close to the export pipeline of evaporator 114.
For another example, under another example, the refrigerated display case 100 also includes being used for the saturation air-breathing for detecting evaporator 114 The temperature sensor of temperature；Control device can be based on the saturated suction temperature come directly by the full of the refrigerating circuit 110 With suction temperature control in predetermined threshold value section.Further, more accurately and easily to obtain the parameter, temperature can be passed Sensor is arranged on the heat exchanging pipe of evaporator 114.
Alternatively, the setting of the refrigerating circuit 110 in refrigerated display case 100 is specifically engaged.Evaporator 114 can be arranged At the bottom of refrigerated display case 100 or back, the cabinet of refrigerated display case 100 so more can be equably transferred heat to In.
According to the teaching of previous embodiment, it can deduce that this conception can be applied in refrigerated display case incessantly.Broadly, its It can be applied to a variety of controlled for cryogenic thermostat in the refrigeration system application with demand.
Specifically, the embodiment of such refrigeration system is provided herein.It should include：Refrigerating circuit, it includes Compressor, condenser, restricting element and the evaporator being sequentially connected by pipeline；Control device, itself and refrigerating circuit communication link Connect, and for directly or indirectly controlling the saturated suction temperature of refrigerating circuit；Wherein, evaporator is finned heat exchanger, and With the fin density not less than 6FPI.Similar to the situation in previous embodiment, now, due to the saturation air-breathing of refrigerating circuit Temperature is controlled in -2 DEG C to+2 DEG C, and for existing -3 DEG C to -10 DEG C of conventional design scope, the refrigerating circuit has Higher saturated suction temperature, that is, the refrigerating circuit is less prone to frosting.Similarly, due to its higher saturation air-breathing temperature Degree, therefore the refrigerating capacity that can be brought on monolithic fin is also relatively reduced.Now, this conception is by further improving evaporation The fin density of device, namely the fin density not less than 6FPI is designed to, to improve the overall refrigerant amount of evaporator, make it It is equally reached and uses required scope.Accordingly, due to the increase of saturated suction temperature, fin density is now further added by Also the generation of frosting problem will not be caused again because of the diminution of spacing of fin.In summary, this conception is keeping refrigerated display Cabinet effectively work refrigerating capacity it is constant in the case of, on the one hand avoid the generation of frosting problem, thus it also avoid because of defrost and The temperature of generation rises sharply rapid drawdown problem, improves the quality for the goods for needing constant temperature to preserve.On the other hand, also eliminate because of defrost and The defrost branch road that need to additionally configure and a part of heat being additionally provided by defrost, and then reduce parts cost and energy Loss.
In addition, other that refrigerated display case is non-specific in previous embodiment integrally-built change to component or further It is kind also to go for the present embodiment.For example, the specific design to fin density；And for example, to the specific design of sensor；Again Such as, to specific design of control object of control device etc..
In addition, to coordinate the constant temperature application of refrigerated display case or other refrigeration systems in previous embodiment, one is also provided The constant-temperature control method of adaptability is covered, it includes：Parameters acquiring procedure S100, obtain and directly or indirectly react refrigerating circuit The monitoring parameters of saturated suction temperature；Comparison step S200, by monitoring parameters compared with monitoring parameters preset value；Control step Rapid S300, directly or indirectly the saturated suction temperature of the refrigerating circuit is controlled at -2 DEG C to+2 DEG C based on comparative result Predetermined threshold value section in.More specifically, rate-determining steps S300 also includes：In monitoring parameters and the ratio of monitoring parameters preset value When going out saturated suction temperature compared with bearing reaction and being higher than predetermined threshold value section, increase the rotating speed of compressor in the refrigerating circuit 110； And/or reflect saturated suction temperature in the comparative result of monitoring parameters and monitoring parameters preset value and be less than predetermined threshold value section When, reduce the rotating speed of compressor in the refrigerating circuit.Due to always controlling saturated suction temperature at -2 DEG C to+2 DEG C, therefore The refrigerating circuit can avoid that frosting problem occurs, therefore the temperature that it also avoid occurring by defrost rises sharply rapid drawdown problem, improve Need the quality for the goods that constant temperature preserves.On the other hand, the defrost branch road that need to additionally be configured by defrost is also eliminated and to change A part of heat that frost is additionally provided, and then reduce parts cost and energy loss.
Alternatively, the monitoring parameters include evaporating pressure and/or suction temperature.Because suction temperature can be directly anti- Should go out the saturated suction temperature of refrigerating circuit, but its to measure levels of precision relatively low, correspondingly also have relatively low material into This.And the measurement levels of precision of evaporating pressure is of a relatively high, and corresponding saturated suction temperature can be calculated by formula, Therefore generally more by the way of such a indirect monitoring.
Example above primarily illustrates refrigerated display case, refrigeration system and the constant-temperature control method of the present invention.It is although only right Some of embodiments of the present invention are described, but those of ordinary skill in the art are it is to be appreciated that the present invention can be with Without departing from its spirit with scope in the form of many other implement.Therefore, the example shown is considered as with embodiment It is illustrative and not restrictive, do not departing from the situation of the spirit and scope of the present invention as defined in appended claims Under, the present invention may cover various modification and replacement.

Claims (20)

  1. A kind of 1. refrigerated display case, it is characterised in that including：
    Refrigerating circuit, it includes compressor, condenser, restricting element and the evaporator being sequentially connected by pipeline；
    Control device, it is communicated to connect with the refrigerating circuit, and for directly or indirectly by the saturation of the refrigerating circuit Suction temperature is controlled in -2 DEG C to+2 DEG C of predetermined threshold value section；
    Wherein, the evaporator is finned heat exchanger, and with the fin density not less than 6FPI.
  2. 2. refrigerated display case according to claim 1, it is characterised in that：The fin density of the evaporator is in 6-25FPI Between.
  3. 3. refrigerated display case according to claim 2, it is characterised in that：The fin density of the evaporator is substantially 11FPI。
  4. 4. according to the refrigerated display case described in claims 1 to 3 any one, it is characterised in that also including pressure sensor, its For detecting the evaporating pressure of the evaporator；Relation of the control device based on the evaporating pressure and saturated suction temperature Indirectly to control the saturated suction temperature of the refrigerating circuit in predetermined threshold value section.
  5. 5. refrigerated display case according to claim 4, it is characterised in that the pressure sensor is close to the evaporator Export pipeline is arranged.
  6. 6. according to the refrigerated display case described in claims 1 to 3 any one, it is characterised in that also including temperature sensor, its For detecting the saturated suction temperature of the evaporator；The control device is based on the saturated suction temperature come directly by institute The saturated suction temperature for stating refrigerating circuit is controlled in predetermined threshold value section.
  7. 7. refrigerated display case according to claim 6, it is characterised in that the temperature sensor arranges the evaporator On heat exchanging pipe.
  8. 8. according to the refrigerated display case described in claims 1 to 3 any one, it is characterised in that the control device is arranged Into by controlling the rotating speed of the compressor come the saturated suction temperature of the refrigerating circuit.
  9. 9. according to the refrigerated display case described in claims 1 to 3 any one, it is characterised in that the evaporator is arranged in institute State the bottom or back of refrigerated display case.
  10. A kind of 10. refrigeration system, it is characterised in that including：
    Refrigerating circuit, it includes compressor, condenser, restricting element and the evaporator being sequentially connected by pipeline；
    Control device, it is communicated to connect with the refrigerating circuit, and for directly or indirectly by the saturation of the refrigerating circuit Suction temperature is controlled in -2 DEG C to+2 DEG C of predetermined threshold value section；
    Wherein, the evaporator is finned heat exchanger, and with the fin density not less than 6FPI.
  11. 11. refrigeration system according to claim 10, it is characterised in that：The fin density of the evaporator is in 6-25FPI Between.
  12. 12. refrigeration system according to claim 11, it is characterised in that：The fin density of the evaporator is substantially 11FPI。
  13. 13. according to the refrigeration system described in claim 10 to 12 any one, it is characterised in that also including pressure sensor, It is used for the evaporating pressure for detecting the evaporator；Pass of the control device based on the evaporating pressure and saturated suction temperature System indirectly to control the saturated suction temperature of the refrigerating circuit in predetermined threshold value section.
  14. 14. refrigeration system according to claim 13, it is characterised in that the pressure sensor is close to the evaporator Export pipeline is arranged.
  15. 15. according to the refrigeration system described in claim 10 to 12 any one, it is characterised in that also including temperature sensor, It is used for the saturated suction temperature for detecting the evaporator；The control device is based on the saturated suction temperature directly will The saturated suction temperature of the refrigerating circuit is controlled in predetermined threshold value section.
  16. 16. refrigeration system according to claim 15, it is characterised in that the temperature sensor arranges the evaporator On heat exchanging pipe.
  17. 17. according to the refrigeration system described in claim 10 to 12 any one, it is characterised in that the control device is arranged Into by controlling the rotating speed of the compressor come the saturated suction temperature of the refrigerating circuit.
  18. A kind of 18. constant-temperature control method, it is characterised in that including：
    Parameters acquiring procedure S100, obtain the monitoring parameters for the saturated suction temperature for directly or indirectly reacting refrigerating circuit；
    Comparison step S200, by monitoring parameters compared with monitoring parameters preset value；
    Rate-determining steps S300, directly or indirectly the saturated suction temperature of the refrigerating circuit is controlled based on comparative result In -2 DEG C to+2 DEG C of predetermined threshold value section.
  19. 19. constant-temperature control method according to claim 18, it is characterised in that the monitoring parameters include evaporating pressure And/or suction temperature.
  20. 20. constant-temperature control method according to claim 18, it is characterised in that rate-determining steps S300 also includes：Monitoring When the comparative result of parameter and monitoring parameters preset value reflects saturated suction temperature and is higher than predetermined threshold value section, increase the system The rotating speed of compressor in cold loop；And/or reflect saturation air-breathing in the comparative result of monitoring parameters and monitoring parameters preset value When temperature is less than predetermined threshold value section, the rotating speed of compressor in the refrigerating circuit is reduced.
CN201610670396.XA 2016-08-16 2016-08-16 Refrigerated display case, refrigeration system and constant-temperature control method Pending CN107752587A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN201610670396.XA CN107752587A (en) 2016-08-16 2016-08-16 Refrigerated display case, refrigeration system and constant-temperature control method
EP17751219.1A EP3500808A1 (en) 2016-08-16 2017-08-02 Refrigeration display case, refrigeration system and thermostatic control method
PCT/US2017/045112 WO2018034846A1 (en) 2016-08-16 2017-08-02 Refrigeration display case, refrigeration system and thermostatic control method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610670396.XA CN107752587A (en) 2016-08-16 2016-08-16 Refrigerated display case, refrigeration system and constant-temperature control method

Publications (1)

Publication Number Publication Date
CN107752587A true CN107752587A (en) 2018-03-06

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CN201610670396.XA Pending CN107752587A (en) 2016-08-16 2016-08-16 Refrigerated display case, refrigeration system and constant-temperature control method

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EP (1) EP3500808A1 (en)
CN (1) CN107752587A (en)
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Application publication date: 20180306