CN111207534A - Refrigeration system, refrigeration equipment and control method of refrigeration system - Google Patents
Refrigeration system, refrigeration equipment and control method of refrigeration system Download PDFInfo
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- CN111207534A CN111207534A CN202010021345.0A CN202010021345A CN111207534A CN 111207534 A CN111207534 A CN 111207534A CN 202010021345 A CN202010021345 A CN 202010021345A CN 111207534 A CN111207534 A CN 111207534A
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- defrosting
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- 238000005057 refrigeration Methods 0.000 title claims abstract description 159
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000007710 freezing Methods 0.000 claims abstract description 85
- 230000008014 freezing Effects 0.000 claims abstract description 85
- 238000010257 thawing Methods 0.000 claims abstract description 65
- 239000003507 refrigerant Substances 0.000 claims abstract description 41
- 238000009825 accumulation Methods 0.000 claims description 24
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 238000005485 electric heating Methods 0.000 abstract description 8
- 238000013508 migration Methods 0.000 description 6
- 230000005012 migration Effects 0.000 description 6
- 238000001816 cooling Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 2
- 235000013305 food Nutrition 0.000 description 2
- 239000011232 storage material Substances 0.000 description 2
- 238000007599 discharging Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
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Classifications
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- 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
- F25B47/02—Defrosting cycles
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- 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
-
- 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
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Defrosting Systems (AREA)
Abstract
The invention relates to a refrigeration system, a refrigeration device and a control method of the refrigeration system, wherein the refrigeration system comprises: a compressor; the inlet end of the freezing evaporator is connected with the exhaust port of the compressor through a first connecting pipeline; the inlet end of the defrosting throttling unit is connected with the outlet end of the refrigeration evaporator; the inlet end of the refrigeration evaporator is connected with the outlet end of the throttling defrosting unit, and the outlet end of the refrigeration evaporator is connected with the air inlet of the compressor; the compressor, the freezing evaporator, the defrosting throttling unit and the refrigerating evaporator can be communicated in sequence to form a defrosting loop allowing a refrigerant to flow. According to the refrigeration system, the high-temperature and high-pressure refrigerant flowing out of the compressor directly enters the freezing evaporator to defrost the freezing evaporator, and an electric heating device is not additionally arranged, so that the defrosting efficiency is improved, the defrosting time is shortened, and the defrosting power is effectively reduced.
Description
Technical Field
The invention relates to the technical field of refrigeration, in particular to a refrigeration system, refrigeration equipment and a control method of the refrigeration system.
Background
Refrigerators for refrigerating or freezing foods (or other articles) are essential home appliances, and provide great convenience to people's lives. In the working process of the refrigerator, because the temperature of the freezing evaporator is low, the wet air flowing through the freezing evaporator is easy to frost on the evaporator, and the refrigeration function of the freezing evaporator is further influenced.
At present, many refrigerators defrost a freezing evaporator by means of electric heating. Specifically, an electric heating pipe is arranged below the evaporator, and air is heated by the electric heating pipe to form natural convection and heat radiation of the electric heating pipe to defrost the refrigeration evaporator. However, defrosting by electric heating has disadvantages of low defrosting efficiency, long defrosting time, high defrosting power consumption, and the like.
Disclosure of Invention
Accordingly, it is necessary to provide a refrigeration system, a refrigeration device, and a control method for the refrigeration system, which have high defrosting efficiency, short defrosting time, and low defrosting power, in order to solve the problems of low defrosting efficiency, long defrosting time, and high defrosting power of a refrigerator.
A refrigeration system comprising:
a compressor;
the inlet end of the freezing evaporator is connected with the exhaust port of the compressor through a first connecting pipeline;
the inlet end of the defrosting throttling unit is connected with the outlet end of the refrigeration evaporator; and
the inlet end of the refrigeration evaporator is connected with the outlet end of the defrosting throttling unit, and the outlet end of the refrigeration evaporator is connected with the air inlet of the compressor;
the compressor, the freezing evaporator, the defrosting throttling unit and the refrigerating evaporator can be communicated in sequence to form a defrosting loop allowing a refrigerant to flow.
According to the refrigeration system, the high-temperature and high-pressure refrigerant flowing out of the compressor directly enters the freezing evaporator to defrost the freezing evaporator, and an electric heating device is not additionally arranged, so that the defrosting efficiency is improved, the defrosting time is shortened, and the defrosting power is effectively reduced.
In one embodiment, the refrigeration system further comprises a condenser and a freezing throttling unit, the condenser and the freezing throttling unit and the first connecting pipeline are connected in parallel between the exhaust port of the compressor and the inlet end of the freezing evaporator, and the exhaust port of the compressor can be alternatively communicated with the inlet end of the condenser or the inlet end of the first connecting pipeline.
In one embodiment, the refrigeration system includes a first electrically operated switching valve through which a discharge port of the compressor connects the condenser and the first connecting pipe, the first electrically operated switching valve controllably communicating the compressor with the freezing evaporator or the first connecting pipe.
In one embodiment, the refrigeration system further comprises a second connecting pipeline, the second connecting pipeline and the defrosting throttling unit are connected in parallel between the outlet end of the freezing evaporator and the refrigerating evaporator, and the refrigerating evaporator is selectively communicated with the defrosting throttling unit or the second connecting pipeline;
the compressor, the condenser, the freezing throttling unit, the freezing evaporator, the second connecting pipeline and the refrigerating evaporator can be sequentially communicated to form a first refrigeration loop allowing a refrigerant to flow.
In one embodiment, the refrigeration system further comprises a third connecting pipeline, the third connecting pipeline and the refrigerating evaporator are connected in parallel between the outlet end of the refrigerating evaporator and the air inlet of the compressor, and the refrigerating evaporator is selectively communicated with the third connecting pipeline or the refrigerating evaporator;
the compressor, the condenser, the freezing throttling unit, the freezing evaporator and the third connecting pipeline can be communicated in sequence to form a second refrigeration loop allowing a refrigerant to flow.
In one embodiment, the refrigeration system further comprises a cold accumulation module, the cold accumulation module is arranged on one side of the refrigeration evaporator, and the cold accumulation module is used for absorbing and storing cold energy of the refrigeration evaporator.
In one embodiment, the cold accumulation module comprises a receiving structure and a cold accumulation agent contained in the receiving structure, and the cold accumulation agent can freeze and solidify at a preset temperature to absorb and store the cold of the refrigeration evaporator.
A refrigeration device comprises the refrigeration system.
A control method of the refrigeration system comprises the following steps:
when the refrigerating system is in a defrosting mode, the compressor, the freezing evaporator, the defrosting throttling unit and the refrigerating evaporator are controlled to be communicated in sequence to form a defrosting loop.
In one embodiment, the refrigeration system further comprises a cold accumulation module, the cold accumulation module is arranged on one side of the refrigeration evaporator, and when the refrigeration system is in the defrosting mode, the cold accumulation module absorbs and stores cold energy of the refrigeration evaporator.
In one embodiment, the refrigeration system further comprises a refrigeration mode, and after the refrigeration system finishes the defrosting mode, the control method comprises the following steps:
acquiring the temperature of a target refrigeration area;
when the temperature of the target refrigeration area is judged to rise to the preset temperature, the cold accumulation module is controlled to provide cold energy to the target refrigeration area, and meanwhile, the temperature of the target refrigeration area is continuously obtained;
and when the temperature of the target refrigeration area is judged to rise to the preset temperature again, controlling the refrigeration system to switch to the refrigeration mode.
Drawings
FIG. 1 is a schematic diagram of the operation of a refrigeration system according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of the operation of the refrigeration system of FIG. 1 in a first refrigeration mode;
FIG. 3 is a schematic diagram of the operation of the refrigeration system of FIG. 1 in a second refrigeration mode;
fig. 4 is a schematic diagram illustrating the operation of the refrigeration system shown in fig. 1 in a defrosting mode.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
As shown in fig. 1, a refrigeration apparatus of an embodiment of the present invention is provided with a refrigeration system 100 for forming a low temperature environment. The structure of the refrigeration system 100 in the present application will be described below by taking a refrigeration apparatus as an example of a refrigerator having a freezing chamber and a refrigerating chamber. The present embodiment is described as an example, and the technical scope of the present application is not limited thereto. It is understood that in other embodiments, the refrigeration device may also be embodied as other devices provided with the refrigeration system 100, such as an ice chest, etc., without limitation.
The refrigeration system 100 includes a control module (not shown), a compressor 10, a condenser 32, a freezing throttle unit 34, a freezing evaporator 50, a refrigerating evaporator 81, a first connecting pipe 40, a second connecting pipe 72, a third connecting pipe 90, a first electric switching valve 20, and a second electric switching valve 60, which are connected to each other through pipes and can form a first refrigeration circuit or a second refrigeration circuit under the control of the control module. When the first refrigeration circuit is in a connected state, the refrigeration system 100 is in a first refrigeration mode in which the refrigerating compartment and the freezing compartment are simultaneously refrigerated; when the second refrigeration circuit is in the connected state, the refrigeration system 100 is in the second refrigeration mode for refrigerating only the freezing compartment.
Specifically, the compressor 10 includes a discharge port for discharging the refrigerant and an intake port for recovering the refrigerant, and the discharge port of the compressor 10 is connected to an inlet end of the first electric changeover valve 20. The first electric switching valve 20 comprises two outlet ends which can be opened and closed under the control of the control module, one outlet end of the first electric switching valve 20 is connected to the inlet end of the condenser 32, the outlet end of the condenser 32 is connected to the inlet end of the freezing throttling unit 34, and the inlet end of the freezing throttling unit 34 is connected to the inlet end of the freezing evaporator 50; the other outlet end of the first electrically operated switching valve 20 is connected to the inlet end of a first connecting pipe 40, and the outlet end of the first connecting pipe 40 is connected to the inlet end of a freezing evaporator 50. Wherein the freezing throttling unit 34 is formed by a capillary tube.
In this way, the condenser 32 and the freezing and throttling unit 34 are connected in parallel with the first connecting pipeline 40 between the outlet end of the compressor 10 and the inlet end of the freezing evaporator 50, and the first electric switching valve 20 controls the opening and closing of the two outlet ends of the first electric switching valve 20 under the control of the control module, so as to control the compressor 10 to alternatively communicate with the condenser 32 or the first connecting pipeline 40.
Further, the outlet end of the freezing evaporator 50 is connected to the inlet end of the second electrically-operated switching valve 60, and the second electrically-operated switching valve 60 includes three outlet ends which can be opened and closed under the control of the control module. One of outlet ends of the first electrically operated switching valve 20 is connected to an inlet end of the defrosting throttle unit 74, an outlet end of the defrosting throttle unit 74 is connected to an inlet end of the refrigerating evaporator 81, and an outlet end of the refrigerating evaporator 81 is connected to an air inlet of the compressor 10. The other outlet end of the second electrically operated switching valve 60 is connected to the inlet end of a second connecting pipe 72, and the outlet end of the second connecting pipe 72 is connected to the inlet end of the refrigerating evaporator 81. The other outlet end of the second electrically operated switching valve 60 is connected to the inlet end of a third connecting pipe 90, and the outlet end of the third connecting pipe 90 is connected to the outlet end of the compressor 10. Wherein the defrosting throttle unit 74 is formed of a capillary tube.
In this way, the defrosting throttle unit 74 and the second connecting pipe 72 are connected in parallel between the freezing evaporator 50 and the refrigerating evaporator 81, the refrigerating evaporator 81 and the third connecting pipe 90 are connected in parallel between the freezing evaporator 50 and the compressor 10, and the second electric switching valve 60 controls the opening and closing of three outlet ends of the second electric switching valve 60 under the control of the control module, so as to control the freezing evaporator 50 to alternatively communicate with one of the defrosting throttle unit 74, the second connecting pipe 72 and the third connecting pipe 90.
Further, the refrigeration system 100 further includes a freezing fan 52 and a refrigerating fan 812. A freezing fan 52 is installed at one side of the freezing evaporator 50 for transferring the cooling energy in the freezing evaporator 50 to the freezing chamber. The refrigerating fan 812 is installed at one side of the refrigerating evaporator 81 to transfer the cooling energy in the refrigerating evaporator 81 to the refrigerating chamber.
As shown in fig. 2, when the refrigeration system 100 is in the first refrigeration mode, the first electric switching valve 20 and the second electric switching valve 60 sequentially communicate the compressor 10, the condenser 32, the freezing throttle unit 34, the freezing evaporator 50, the second connecting pipe 72, and the refrigerating evaporator 81 under the control of the control module, thereby forming a first refrigeration circuit allowing a refrigerant to flow.
Specifically, a high-temperature and high-pressure gaseous refrigerant flows out of an exhaust port of the compressor 10, enters the condenser 32 to be discharged and condensed into a medium-temperature and medium-pressure refrigerant, and then enters the freezing throttling unit 34 to be throttled into a low-temperature and low-pressure liquid refrigerant. The throttled liquid refrigerant enters the freezing evaporator 50 to absorb heat, and the freezing fan 52 transmits the cold energy in the freezing evaporator 50 to the freezing chamber, so that the freezing chamber is refrigerated. The refrigerant flowing out of the freezing evaporator 50 flows into the refrigerating evaporator 81 through the second connection pipe, further absorbs heat in the refrigerating evaporator 81 and evaporates, and the refrigerating fan 812 transfers the cold in the refrigerating evaporator 81 to the refrigerating chamber, thereby refrigerating the refrigerating chamber. Finally, the refrigerant flowing out of the refrigeration evaporator 81 returns to the compressor 10. The above process is continuously cycled to simultaneously refrigerate the freezer compartment and the fresh food compartment.
As shown in fig. 3, when the refrigeration system 100 is in the second refrigeration mode, the first electric switching valve 20 and the second electric switching valve 60 sequentially communicate the compressor 10, the condenser 32, the freezing throttle unit 34, the freezing evaporator 50, and the third connecting pipe 90 under the control of the control module, thereby forming a second refrigeration circuit allowing a refrigerant to flow.
Specifically, a high-temperature and high-pressure gaseous refrigerant flows out of an exhaust port of the compressor 10, enters the condenser 32 to be cooled and condensed into a medium-temperature and medium-pressure refrigerant, and then enters the freezing throttling unit 34 to be throttled into a low-temperature and low-pressure liquid refrigerant. The throttled liquid refrigerant enters the freezing evaporator 50 to absorb heat, and the freezing fan 52 transmits the cold energy in the freezing evaporator 50 to the freezing chamber, so that the freezing chamber is refrigerated. The refrigerant flowing out of the freezing evaporator 50 is directly returned to the compressor 10 through the third connecting pipe 90. The above process is continuously circulated so that only the freezing chamber is refrigerated.
As shown in fig. 4, the refrigeration system 100 also has a defrosting mode because the wet air in the refrigerator is very likely to frost on the surface of the freezing evaporator 50 when passing through the freezing evaporator 50. When the refrigeration system 100 is in the defrosting mode, the first electric switching valve 20 and the second electric switching valve 60 sequentially communicate the compressor 10, the first connection pipe 40, the freezing evaporator 50, the defrosting throttle unit 74, and the refrigerating evaporator 81 under the control of the control module, thereby forming a defrosting circuit allowing a refrigerant to flow.
Specifically, a high-temperature and high-pressure gaseous refrigerant flows out of an exhaust port of the compressor 10, and enters the refrigeration evaporator 50 through the first connection pipe, and the high-temperature and high-pressure refrigerant is thermally released into a medium-temperature and medium-pressure refrigerant in the refrigeration evaporator 50, thereby defrosting the refrigeration evaporator 50. The refrigerant flowing out of the freezing evaporator 50 enters the defrosting throttle unit 74 through the second electric switching valve 60, is throttled into a low-temperature and low-pressure refrigerant in the defrosting throttle unit 74, then enters the refrigerating evaporator 81 to absorb heat and evaporate into a gaseous refrigerant, and finally returns to the compressor 10 again. The above process is continuously circulated, so that the freezing evaporator 50 is defrosted by using a high-temperature and high-pressure refrigerant.
Therefore, the refrigeration system 100 directly enters the freezing evaporator 50 to defrost the freezing evaporator 50 by using the high-temperature and high-pressure refrigerant flowing out of the compressor 10, and therefore, an electric heating device is not required to be additionally arranged, thereby effectively improving defrosting efficiency, shortening defrosting time, effectively reducing defrosting power and reducing energy consumption of refrigeration equipment.
In some embodiments, the refrigeration system 100 further includes a cold storage module 83, and the cold storage module 83 is disposed at one side of the refrigeration evaporator 81 and is used for absorbing and storing cold energy of the refrigeration evaporator 81, so as to provide heat for the refrigerant to ensure that the defrosting process can be continuously performed. Specifically, the cold storage module 83 includes a receiving structure and a cold storage agent received in the receiving structure, and the cold storage agent can be frozen and solidified at a predetermined temperature (e.g., 0 ℃ to-20 ℃) to absorb and store the cold energy of the refrigeration evaporator 81. When the refrigerator is in the first refrigeration mode or the second refrigeration mode, after the refrigeration of the refrigeration evaporator 81 is stopped, the cold storage module 83 can continue to provide cold energy for the refrigeration chamber, so that the refrigeration frequency of the refrigeration evaporator 81 is reduced, the refrigerant migration frequency and the refrigerant migration loss are reduced, and the heat exchange equipment is more energy-saving.
In some embodiments, after the refrigeration system 100 ends the defrosting mode, the control method of the refrigeration system 100 includes the following steps:
s110: and acquiring the temperature of the target refrigeration area.
Specifically, the target refrigeration area is a refrigerating chamber, and the control module can acquire the temperature of the refrigerating chamber in real time.
S120: when the temperature of the target refrigeration area is judged to rise to the preset temperature, the cold accumulation module 83 is controlled to provide cold energy to the target refrigeration area, and meanwhile, the temperature of the target refrigeration area is continuously obtained.
Specifically, when the control module determines that the temperature of the refrigerating chamber rises to the preset temperature, it indicates that the temperature of the refrigerating chamber reaches the maximum critical value, and therefore the control module controls the refrigerating fan 812 to operate to deliver the cooling energy of the cold accumulation module 83 to the refrigerating chamber, thereby lowering and maintaining the temperature of the refrigerating chamber. Because only the cold accumulation module 83 needs to provide cold energy and does not need to start the refrigeration evaporator 81, the refrigeration frequency and the refrigerant migration frequency of the refrigeration evaporator 81 are reduced, and further, the refrigerant migration loss is reduced, and the refrigeration equipment is more energy-saving and power-saving.
S130: and when the temperature of the target refrigeration area is judged to rise to the preset temperature again, controlling the refrigeration system 100 to switch to the refrigeration mode.
Specifically, since the cooling capacity provided by the cold accumulation module 83 is limited, when the control module determines that the temperature of the refrigerating chamber rises to the preset temperature again, it indicates that the cooling capacity stored in the cold accumulation module 83 cannot keep the refrigerating chamber at a lower temperature, and therefore the control module controls the first electric switching valve 20 to communicate the compressor 10 with the condenser 32, and controls the refrigerating evaporator 81 communicated with the freezing evaporator 50 through the second connecting pipe 72, so that the refrigerating evaporator 81 recovers the refrigerating function to lower and maintain the temperature of the refrigerating chamber.
In the refrigeration system 100, the refrigeration device, and the control method of the refrigeration system 100, the refrigeration evaporator 50 is defrosted by using the high-temperature and high-pressure refrigerant output from the compressor 10, which has higher defrosting efficiency compared with the defrosting of an electric heater in the prior art, and has low defrosting power consumption, and the temperature rise of the freezing chamber is very small during defrosting. In addition, the cold accumulation module 83 can keep the cold generated during the defrosting process in the refrigeration equipment, and can play a role in refrigerating for a certain time after the refrigeration equipment is defrosted, and in a normal refrigeration cycle, when the refrigeration evaporator 81 stops refrigerating, the cold accumulation module 83 can also continue to provide cold for the refrigerating chamber. Therefore, the refrigeration frequency of the refrigeration evaporator 81 is effectively reduced, the frequency of refrigerant migration is reduced, the refrigerant migration loss is further reduced, the energy consumption of the refrigeration equipment is finally reduced, and the refrigeration equipment is more energy-saving and environment-friendly.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (11)
1. A refrigeration system, comprising:
a compressor (10);
a freezing evaporator (50), wherein the inlet end of the freezing evaporator (50) is connected with the exhaust port of the compressor (10) through a first connecting pipeline (40);
the inlet end of the defrosting throttling unit (74) is connected with the outlet end of the refrigeration evaporator (50); the inlet end of the refrigerating evaporator (81) is connected with the outlet end of the defrosting throttling unit (74), and the outlet end of the refrigerating evaporator (81) is connected with the air inlet of the compressor (10);
the compressor (10), the freezing evaporator (50), the defrosting throttling unit (74) and the refrigerating evaporator (81) can be communicated in sequence to form a defrosting circuit allowing a refrigerant to flow.
2. The refrigeration system according to claim 1, further comprising a condenser (32) and a freezing throttling unit (34), the condenser (32) and the freezing throttling unit (34) being connected in parallel with the first connecting conduit (40) between a discharge of the compressor (10) and an inlet of the freezing evaporator (50), the discharge of the compressor (10) being alternatively in communication with the inlet of the condenser (32) or the inlet of the first connecting conduit (40).
3. Refrigeration system according to claim 2, characterized in that it comprises a first electrically operated switching valve (20), the discharge of the compressor (10) connecting the condenser (32) with the first connection duct (40) through the first electrically operated switching valve (20), the first electrically operated switching valve (20) controllably communicating the compressor (10) with the freezing evaporator (50) or the first connection duct (40).
4. The refrigeration system according to claim 2, further comprising a second connecting duct (72), the second connecting duct (72) and the defrosting throttling unit (74) being connected in parallel between an outlet end of the freezing evaporator (50) and the refrigerating evaporator (81), the refrigerating evaporator (81) being in communication with the defrosting throttling unit (74) or the second connecting duct (72) selectively;
the compressor (10), the condenser (32), the freezing throttling unit (34), the freezing evaporator (50), the second connecting pipeline (72) and the refrigerating evaporator (81) can be sequentially communicated to form a first refrigeration loop allowing a refrigerant to flow.
5. A refrigeration system as claimed in claim 2, characterized in that it further comprises a third connecting duct (90), said third connecting duct (90) and said refrigerating evaporator (81) being connected in parallel between the outlet end of said refrigerating evaporator (81) and the air inlet of said compressor (10), said refrigerating evaporator (81) being in communication with said third connecting duct (90) or with said refrigerating evaporator (81) selectively;
the compressor (10), the condenser (32), the freezing throttling unit (34), the freezing evaporator (50) and the third connecting pipeline (90) can be sequentially communicated to form a second refrigeration loop allowing a refrigerant to flow.
6. Refrigeration system according to any of claims 1 to 5, characterized in that it further comprises a cold storage module (83), said cold storage module (83) being provided at one side of said refrigeration evaporator (81), said cold storage module (83) being adapted to absorb and store cold from said refrigeration evaporator (81).
7. The refrigeration system as recited in claim 6, characterized in that the cold accumulation module (83) comprises a receiving structure and a cold accumulation agent contained in the receiving structure, the cold accumulation agent can freeze and solidify at a preset temperature to absorb and store the cold of the refrigeration evaporator (81).
8. Refrigeration device, characterized in that it comprises a refrigeration system according to any one of claims 1 to 7.
9. A control method of a refrigerating system as recited in any one of claims 1 to 7, comprising the steps of:
when the refrigeration system is in a defrosting mode, the compressor (10), the freezing evaporator (50), the defrosting throttling unit (74) and the refrigerating evaporator (81) are controlled to be communicated in sequence to form a defrosting circuit.
10. The control method according to claim 9, characterized in that the refrigeration system further comprises a cold accumulation module (83), the cold accumulation module (83) is arranged at one side of the refrigeration evaporator (81), and when the refrigeration system is in the defrosting mode, the cold accumulation module (83) absorbs and stores cold energy of the refrigeration evaporator (81).
11. The control method as set forth in claim 10, wherein said refrigeration system further includes a refrigeration mode, and after said refrigeration system finishes said defrosting mode, said refrigeration system control method includes the steps of:
acquiring the temperature of a target refrigeration area;
when the temperature of the target refrigeration area is judged to rise to the preset temperature, the cold accumulation module (83) is controlled to provide cold to the target refrigeration area, and meanwhile, the temperature of the target refrigeration area is continuously obtained;
and when the temperature of the target refrigeration area is judged to rise to the preset temperature again, controlling the refrigeration system to switch to the refrigeration mode.
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| CN113432365A (en) * | 2020-03-23 | 2021-09-24 | 青岛海尔电冰箱有限公司 | Refrigerating system for refrigerating and freezing device and refrigerating and freezing device |
| CN113720088A (en) * | 2021-08-31 | 2021-11-30 | 青岛海尔电冰箱有限公司 | Refrigerating and freezing device and control method thereof |
| CN115289744A (en) * | 2022-07-25 | 2022-11-04 | 珠海格力电器股份有限公司 | Refrigeration system, control method thereof and display cabinet equipment |
| CN115540408A (en) * | 2021-06-30 | 2022-12-30 | 青岛海尔电冰箱有限公司 | Refrigerating system for refrigerating and freezing device and refrigerating and freezing device |
| CN115540406A (en) * | 2021-06-29 | 2022-12-30 | 青岛海尔电冰箱有限公司 | Refrigerating system for refrigerating and freezing device and refrigerating and freezing device |
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Application publication date: 20200529 |