CN111895691A - Variable flow hot gas defrosting mechanism of small refrigeration system - Google Patents
Variable flow hot gas defrosting mechanism of small refrigeration system Download PDFInfo
- Publication number
- CN111895691A CN111895691A CN202010815479.XA CN202010815479A CN111895691A CN 111895691 A CN111895691 A CN 111895691A CN 202010815479 A CN202010815479 A CN 202010815479A CN 111895691 A CN111895691 A CN 111895691A
- Authority
- CN
- China
- Prior art keywords
- defrosting
- compressor
- hot gas
- refrigeration system
- variable flow
- 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
Links
Images
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
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
- F25B47/02—Defrosting cycles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2347/00—Details for preventing or removing deposits or corrosion
- F25B2347/02—Details of defrosting cycles
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Defrosting Systems (AREA)
Abstract
The invention discloses a variable-flow hot gas defrosting mechanism of a small refrigeration system, which comprises a compressor, wherein an output port of the compressor is connected with three or more one-way electromagnetic valves connected in parallel through an air pipe, one ends of the three or more one-way electromagnetic valves are respectively connected with an evaporator through the air pipe, the heat of a medium is directly transferred to snow frost on the surface of the evaporator without a throttling device, so that the snow frost is melted, and the medium after heat exchange returns to the compressor through an air return pipeline, so that the circulation is realized. (the loop is shown as a solid line, not a dashed line). The invention adopts the unidirectional electromagnetic valve to combine the circulating hot air for defrosting, has high defrosting efficiency, can adjust the flow according to the change of the defrosting return air pressure, and has simple control and structure and maturity and stability of the electromagnetic valve.
Description
Technical Field
The invention relates to the technical field of refrigeration, in particular to a variable-flow hot gas defrosting mechanism of a small refrigeration system.
Background
The refrigerant in the refrigeration system is subjected to continuous refrigeration circulation to exchange heat with air continuously on the surface of the evaporator, so that frost is formed due to low temperature, cold transmission and emission of the refrigeration evaporator (pipeline) are prevented, and the refrigeration effect is influenced. When the thickness of the frost layer (ice layer) on the surface of the evaporator reaches a certain degree, the refrigeration efficiency even drops below 10%, resulting in a large waste of electric energy and a shortened service life of the refrigeration system. It is therefore necessary to perform a freezer defrost operation in a suitable cycle, for the purpose of defrosting: the refrigeration efficiency of the system is improved, the quality of frozen products in the refrigerator is guaranteed, electric energy is saved, and the service life of the refrigerator system is prolonged.
The defrosting mode adopted by the existing small refrigeration system is electric heating defrosting or hot gas defrosting by using a steering valve. The electric heating defrosting mode adopts an electric heating mode, the efficiency is very low, and the electric heating has the danger of electric leakage; the steering valve used in the hot gas defrosting of the steering valve has a complex structure, the flow is fixed and cannot be adjusted, the reaction is not rapid enough, and the risk of maintaining equipment is increased.
Disclosure of Invention
Based on the technical problems in the prior art, the invention provides a variable-flow hot gas defrosting mechanism of a small refrigeration system.
The invention provides a variable-flow hot gas defrosting mechanism of a small refrigeration system, which comprises a compressor, one-way electromagnetic valves and an evaporator, wherein an output port of the compressor is connected with three or more one-way electromagnetic valve groups connected in parallel through an air pipe, one ends of the three or more one-way electromagnetic valves are respectively connected with the evaporator through the air pipe, the heat of a medium is directly transferred to snow frost on the surface of the evaporator without a throttling device, so that the snow frost is melted, and the medium after heat exchange returns to the compressor through an air return pipeline, so that the circulation is realized.
Preferably, the defrosting system needs the number of parallel combination of the one-way solenoid valves.
Preferably, the defrosting system is matched with the size of the pipe diameter according to the discharge quantity of the compressor.
Preferably, the defrosting system controls the number of starting and stopping of the one-way solenoid valves according to the defrosting pressure requirement.
The invention adopts the unidirectional electromagnetic valve to combine the circulating hot air for defrosting, has high defrosting efficiency, can adjust the flow according to the change of the defrosting return air pressure, has simple, mature and stable electromagnetic valve, better implements stable and efficient defrosting, reduces easily damaged parts and has better power consumption.
Drawings
Fig. 1 is a schematic view of the working principle of the variable flow hot gas defrosting mechanism of the small refrigeration system provided by the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1, the variable flow hot gas defrosting mechanism of the small refrigeration system comprises a compressor 1, a one-way solenoid valve 3 and an evaporator 5, wherein an output port of the compressor 1 is connected with three or more one-way solenoid valves connected in parallel through air pipes, the three or more one ends of the one-way solenoid valves are respectively connected with the evaporator 5 through air pipes, and the evaporator 5 directly transfers heat of a medium to snow frost on the surface of the evaporator 5 without passing through a throttling device 4, so that the snow frost is melted, and the medium after heat exchange is finished returns to the compressor 1 through an air return pipeline, and the process is repeated.
The variable-flow hot gas defrosting mechanism of the small refrigeration system is characterized by comprising a plurality of parallel combination of one-way electromagnetic valves; matching the discharge capacity of the compressor 1 with the pipe diameter; and controlling the starting and stopping quantity of the one-way electromagnetic valve set according to the defrosting pressure requirement.
The working principle is as follows: the invention relates to a process for defrosting in a refrigeration process, which is designed aiming at a defrosting process, wherein in the process of low-temperature refrigeration, because the surface temperature of an evaporator 5 is too low, moisture in air flowing through the surface can be condensed into frost, and when the condensed frost is continuously thickened, the heat exchange efficiency of the evaporator 5 can be continuously reduced, so that the refrigeration effect is influenced.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (4)
1. Variable flow steam defrosting mechanism of small-size refrigerating system, including compressor (1), check solenoid valve group (3), evaporimeter (5), compressor (1) delivery outlet is connected with three or a plurality of parallelly connected check solenoid valve (3), three or a plurality of through the trachea evaporator (5) are being connected respectively to check solenoid valve's one end through the trachea, do not pass through throttling arrangement (4), directly give the snow frost on evaporimeter (5) surface with the heat transfer of medium to make it melt, the medium that the heat transfer finishes returns compressor (1) via the return-air pipeline again, so circulation.
2. The variable flowrate hot gas defrost mechanism of a small refrigeration system of claim 1, wherein there are a number of parallel combinations of one-way solenoid valves.
3. The variable flow hot gas defrosting mechanism of a small refrigeration system according to claim 1 is characterized in that the discharge capacity of the compressor (1) is matched with the size of the pipe diameter.
4. The variable flow hot gas defrosting mechanism of the small refrigeration system according to claim 1 is characterized in that the number of the starting and stopping of the check solenoid valve set (3) is controlled according to the defrosting pressure requirement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010815479.XA CN111895691A (en) | 2020-08-14 | 2020-08-14 | Variable flow hot gas defrosting mechanism of small refrigeration system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010815479.XA CN111895691A (en) | 2020-08-14 | 2020-08-14 | Variable flow hot gas defrosting mechanism of small refrigeration system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111895691A true CN111895691A (en) | 2020-11-06 |
Family
ID=73229035
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010815479.XA Pending CN111895691A (en) | 2020-08-14 | 2020-08-14 | Variable flow hot gas defrosting mechanism of small refrigeration system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111895691A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112944784A (en) * | 2021-03-22 | 2021-06-11 | 加西贝拉压缩机有限公司 | Variable-cooling-capacity external member for sealed reciprocating refrigerator compressor and using method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104634019A (en) * | 2015-01-22 | 2015-05-20 | 青岛澳柯玛超低温冷冻设备有限公司 | Medical refrigeration container hot gas defrosting system for temperature and humidity control |
| CN106403205A (en) * | 2016-11-29 | 2017-02-15 | 广东美的制冷设备有限公司 | Air-conditioner defrosting system and defrosting control method |
| CN107178941A (en) * | 2017-07-06 | 2017-09-19 | 王道均 | Three source refrigeration control systems of intelligence |
| CN208458309U (en) * | 2018-06-21 | 2019-02-01 | 广州骊阳能源科技有限公司 | A kind of novel bypass defrosting heat pump system |
| CN110595093A (en) * | 2019-09-30 | 2019-12-20 | 海信（广东）空调有限公司 | Air conditioning system |
-
2020
- 2020-08-14 CN CN202010815479.XA patent/CN111895691A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104634019A (en) * | 2015-01-22 | 2015-05-20 | 青岛澳柯玛超低温冷冻设备有限公司 | Medical refrigeration container hot gas defrosting system for temperature and humidity control |
| CN106403205A (en) * | 2016-11-29 | 2017-02-15 | 广东美的制冷设备有限公司 | Air-conditioner defrosting system and defrosting control method |
| CN107178941A (en) * | 2017-07-06 | 2017-09-19 | 王道均 | Three source refrigeration control systems of intelligence |
| CN208458309U (en) * | 2018-06-21 | 2019-02-01 | 广州骊阳能源科技有限公司 | A kind of novel bypass defrosting heat pump system |
| CN110595093A (en) * | 2019-09-30 | 2019-12-20 | 海信（广东）空调有限公司 | Air conditioning system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112944784A (en) * | 2021-03-22 | 2021-06-11 | 加西贝拉压缩机有限公司 | Variable-cooling-capacity external member for sealed reciprocating refrigerator compressor and using method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105299987A (en) | Air source heat pump sprinkling defrosting device based on super-hydrophobic finned tube exchanger | |
| CN201706831U (en) | Energy-saving constant-temperature constant-humid preserving refrigeratory system | |
| CN101644508B (en) | Multi-connected air conditioner multifunctional system for cold water and hot water | |
| CN100365357C (en) | Heat pump and structure of extraction heat exchanger thereof | |
| CN108224774A (en) | A kind of carbon dioxide heat pump water heater with defrosting | |
| CN211823378U (en) | Refrigerator with a door | |
| CN102563974A (en) | Coupling injection enthalpy-increasing air source heat pump system | |
| CN110762872A (en) | Air cooler system capable of alternately defrosting | |
| CN101487639B (en) | Air-cooling double-evaporator heat pump unit | |
| CN105276861A (en) | Compensation type double-source heat pump cold and hot air air-conditioner unit | |
| CN104061727A (en) | Air source heat pump defrosting device based on fast evaporation of liquid drops in initial process of frosting | |
| CN105258389A (en) | Compensation type dual-source heat pump cold and hot water unit | |
| CN111895691A (en) | Variable flow hot gas defrosting mechanism of small refrigeration system | |
| CN201463433U (en) | Hot air defroster for multi-set parallel evaporator refrigeration system | |
| CN201637184U (en) | Energy-saving refrigerating house and quick-freeze tunnel refrigeration equipment thereof | |
| CN105135553A (en) | Multiple-on-line system and method for enhancing supercooling degree of multiple-on-line system | |
| CN101532743B (en) | Heat pump unit of air and water source double-condenser | |
| CN201429262Y (en) | Heat pump system for air-source heat pump water heater | |
| CN200986276Y (en) | Composite multiple controlled cold and warm air conditioner hot-water center | |
| CN205580023U (en) | Transducer air conditioning with refrigerant storage container | |
| CN209910203U (en) | Air-cooled water chilling unit integrating vapor compression circulation and natural cooling | |
| CN201072271Y (en) | Energy-saving defrosting heat pump units | |
| CN203964488U (en) | Adopt the air source heat pump defrosting device of hot-air evaporation initial liquid drop | |
| CN114234503A (en) | Defrosting assembly, control method thereof and air conditioning system | |
| CN207893918U (en) | A kind of improved heat source tower heat pump device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20201106 |
|
| RJ01 | Rejection of invention patent application after publication |