CN115406137A - Refrigerator control system - Google Patents
Refrigerator control system Download PDFInfo
- Publication number
- CN115406137A CN115406137A CN202211049314.1A CN202211049314A CN115406137A CN 115406137 A CN115406137 A CN 115406137A CN 202211049314 A CN202211049314 A CN 202211049314A CN 115406137 A CN115406137 A CN 115406137A
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- Prior art keywords
- outlet
- flow path
- evaporator
- inlet
- solenoid valve
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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
- F25B13/00—Compression machines, plants or systems, with reversible cycle
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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
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
- F25B41/24—Arrangement of shut-off valves for disconnecting a part of the refrigerant cycle, e.g. an outdoor part
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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
- F25B41/40—Fluid line arrangements
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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
Abstract
The invention discloses a refrigerator control system, which comprises a refrigerant flow path, wherein a compressor, a four-way electromagnetic valve, a first condenser, a first throttling device, a first evaporator, a first dual-way electromagnetic valve, a second condenser, a second throttling device, a second evaporator and a second dual-way electromagnetic valve are arranged on the refrigerant flow path.
Description
Technical Field
The invention relates to the technical field of refrigerator control, in particular to a refrigerator control system.
Background
With the improvement of living standard, the requirement of people on low-temperature freezing of the refrigerator is higher and higher, the refrigeration efficiency of the existing refrigerator refrigeration system is relatively higher at relatively lower temperature, and when the temperature is further reduced, the refrigeration capacity and efficiency are reduced quickly, so that the application scene of larger refrigeration capacity cannot be met. In addition, the conventional air-cooled frostless refrigerator generally carries out defrosting on an evaporator regularly through a heater, a compressor is turned off when the refrigerator is in a defrosting mode, a refrigerating system of the refrigerator stops working, the evaporator is defrosted by heat generated by electrifying and heating the heater, the heater generally needs a long time to complete defrosting of the evaporator, defrosting efficiency is low, energy consumption is high, and the risk of food deterioration is caused when the temperature in a refrigerating chamber is increased in the defrosting mode. There is a need for improvements in the prior art.
Disclosure of Invention
The invention aims to provide a refrigerator control system to solve the problems that in the prior art, a refrigerator is low in refrigeration efficiency in a low-temperature mode, low in defrosting efficiency in a defrosting mode and high in energy consumption.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a refrigerator control system comprises a refrigerant flow path, wherein a compressor, a four-way electromagnetic valve, a first condenser, a first throttling device, a first evaporator, a first dual-way electromagnetic valve, a second condenser, a second throttling device, a second evaporator and a second dual-way electromagnetic valve are arranged on the refrigerant flow path;
the four-way solenoid valve has a first inlet, a first outlet, a second outlet, a third outlet, and a fourth outlet, the first dual-way solenoid valve has a second inlet, a fifth outlet, and a sixth outlet, the second dual-way solenoid valve has a third inlet, a seventh outlet, and an eighth outlet;
the exhaust port of the compressor is connected with the first inlet;
the first outlet is connected with the inlet ends of the first condenser, the first throttling device and the first evaporator in sequence, the outlet end of the first evaporator is connected with the second inlet, and the fifth outlet is connected with the air suction port of the compressor;
the second outlet is connected with the second condenser, the second throttling device and the inlet end of the second evaporator in sequence, the outlet end of the second evaporator is connected with the third inlet, and the seventh outlet is connected with the air suction port of the compressor;
the third outlet is connected with the inlet end of the first evaporator;
the sixth outlet is connected with the inlet end of the second evaporator;
the fourth outlet is connected with the inlet end of the second evaporator;
the eighth outlet is connected to the inlet end of the first evaporator.
Preferably, the system includes a standard refrigeration mode, a cryogenic mode, a first evaporator defrost mode, and a second evaporator defrost mode.
Preferably, in the standard refrigeration mode, the four-way solenoid valve controls a first flow path from the first inlet to the first outlet to be communicated, the first dual-way solenoid valve controls a second flow path from the second inlet to the fifth outlet to be communicated, and the refrigerant sequentially passes through the compressor, the first flow path, the first condenser, the first throttling device, the first evaporator, and the second flow path to form a refrigerant circulation loop.
Preferably, in the standard refrigeration mode, the four-way solenoid valve controls a third flow path from the first inlet to the second outlet to be communicated, the second dual-way solenoid valve controls a fourth flow path from the third inlet to the seventh outlet to be communicated, and the refrigerant sequentially passes through the compressor, the third flow path, the second condenser, the second throttling device, the second evaporator, and the fourth flow path to form a refrigerant circulation loop.
Preferably, in the deep cooling mode, the four-way solenoid valve controls a first flow path from the first inlet to the first outlet to be communicated, a third flow path from the first inlet to the second outlet is communicated, the first dual-way solenoid valve controls a second flow path from the second inlet to the fifth outlet to be communicated, the second dual-way solenoid valve controls a fourth flow path from the third inlet to the seventh outlet to be communicated, the refrigerant is divided into two paths after passing through the compressor, the first path sequentially passes through the first flow path, the first condenser, the first throttling device, the first evaporator and the second flow path, the second path sequentially passes through the third flow path, the second condenser, the second throttling device, the second evaporator and the fourth flow path, and the first path and the second path are converged back to the compressor to form a refrigerant circulation loop.
Preferably, in the first evaporator defrosting mode, the four-way solenoid valve controls a fifth flow path from the first inlet to the third outlet to be communicated, the first dual-flow solenoid valve controls a sixth flow path from the second inlet to the sixth outlet to be communicated, the second dual-flow solenoid valve controls a fourth flow path from the third inlet to the seventh outlet to be communicated, and the refrigerant sequentially passes through the compressor, the fifth flow path, the first evaporator, the sixth flow path, the second evaporator and the fourth flow path to form a refrigerant circulation loop.
Preferably, in the second evaporator defrosting mode, the four-way solenoid valve controls a seventh flow path from the first inlet to the fourth outlet to be communicated, the second dual-way solenoid valve controls an eighth flow path from the third inlet to the eighth outlet to be communicated, the first dual-way solenoid valve controls a second flow path from the second inlet to the fifth outlet to be communicated, and the refrigerant sequentially passes through the compressor, the seventh flow path, the second evaporator, the eighth flow path, the first evaporator and the fourth flow path to form a refrigerant circulation loop.
Compared with the prior art, the invention has the following beneficial effects:
the refrigerator control system has a deep cooling mode, and the first evaporator and the second evaporator participate in refrigeration at the same time, so that the refrigeration efficiency of the refrigerator is further improved, and low-temperature refrigeration is realized. Through changing the circulation path of refrigerant under the mode of changing the frost, compromise the refrigeration when changing the frost, it is efficient to change the frost, and the energy consumption is low, has avoided food to take place to deteriorate simultaneously effectively.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings required to be used in the embodiments will be briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a refrigerator control system according to the present invention.
In the figure: 1. a compressor; 2. a four-way solenoid valve; 3. a first condenser; 4. a first throttling device; 5. a first evaporator; 6. a first dual-mode solenoid valve; 7. a second condenser; 8. a second throttling device; 9. a second evaporator; 10. a second dual-way solenoid valve; a. a first inlet; b. a first outlet; c. a second outlet; d. a third outlet; e. a fourth outlet; f. a second inlet; g. a fifth outlet; h. a sixth outlet; i. a third inlet; j. a seventh outlet; k. and an eighth outlet.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; may be a mechanical connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1, a refrigerator control system according to a preferred embodiment of the present invention includes a refrigerant flow path, and a compressor 1, a four-way solenoid valve 2, a first condenser 3, a first throttling device 4, a first evaporator 5, a first dual-way solenoid valve 6, a second condenser 7, a second throttling device 8, a second evaporator 9, and a second dual-way solenoid valve 10 are disposed in the refrigerant flow path.
The four-way solenoid valve 2 is electrically connected with a control device of the refrigerator, the control device controls the four-way solenoid valve 2 to perform corresponding opening and closing actions, and specifically, the four-way solenoid valve 2 is provided with a first inlet a, a first outlet b, a second outlet c, a third outlet d and a fourth outlet e.
The first dual-purpose magnetic valve 6 is electrically connected to a control device of the refrigerator, and the control device controls the first dual-purpose magnetic valve 6 to perform corresponding opening and closing actions, specifically, the first dual-purpose magnetic valve 6 has a second inlet f, a fifth outlet g and a sixth outlet h.
The second dual-purpose solenoid valve 10 is electrically connected to a control device of the refrigerator, and the control device controls the second dual-purpose solenoid valve 10 to perform corresponding opening and closing operations, and specifically, the second dual-purpose solenoid valve 10 has a third inlet i, a seventh outlet j, and an eighth outlet k.
The components on the refrigerant flow path are connected through pipelines, and specifically, an exhaust port of the compressor 1 is connected with a first inlet a of the four-way solenoid valve 2.
The first outlet b of the four-way electromagnetic valve 2 is connected with the inlet ends of the first condenser 3, the first throttling device 4 and the first evaporator 5 in sequence, the outlet end of the first evaporator 5 is connected with the second inlet f of the first double-way electromagnetic valve 6, and the fifth outlet g of the first double-way electromagnetic valve 6 is connected with the air suction port of the compressor 1.
The second outlet c of the four-way solenoid valve 2 is connected with the inlet ends of the second condenser 7, the second throttling device 8 and the second evaporator 9 in sequence, the outlet end of the second evaporator 9 is connected with the third inlet i of the second dual-purpose solenoid valve 10, and the seventh outlet j of the second dual-purpose solenoid valve 10 is connected with the air suction port of the compressor 1.
The third outlet d of the four-way solenoid valve 2 is connected with the inlet end of the first evaporator 5.
The sixth outlet h of the first dual-way solenoid valve 6 is connected to the inlet end of the second evaporator 9.
The fourth outlet e of the four-way solenoid valve 2 is connected with the inlet end of the second evaporator 9.
The eighth outlet k of the second dual-way solenoid valve 10 is connected to the inlet end of the first evaporator 5.
The refrigerator control system includes: the system comprises a standard refrigeration mode, a deep cooling mode, a first evaporator defrosting mode and a second evaporator defrosting mode.
The standard refrigeration mode comprises two refrigerant circulation loops.
The first quasi-cooling mode: the compressor 1 is started, the four-way electromagnetic valve 2 controls the conduction of a first flow path from the first inlet a to the first outlet b, the first dual-way electromagnetic valve 6 controls the conduction of a second flow path from the second inlet f to the fifth outlet g, and a refrigerant is compressed by the compressor 1 and then sequentially passes through the first flow path, the first condenser 3, the first throttling device 4, the first evaporator 5 and the second flow path to form a refrigerant circulation loop.
A first quasi-cooling mode: the compressor 1 is started, the four-way electromagnetic valve 2 controls the conduction of a third flow path from the first inlet a to the second outlet c, the second dual-way electromagnetic valve 10 controls the conduction of a fourth flow path from the third inlet i to the seventh outlet j, and a refrigerant is compressed by the compressor 1 and then sequentially passes through the third flow path, the second condenser 7, the second throttling device 8, the second evaporator 9 and the fourth flow path to form a refrigerant circulation loop.
The refrigerator can select any one of the refrigerant circulation loops in the standard refrigeration mode.
The deep cooling mode or the rapid cooling mode requires a large cooling capacity.
In the deep cooling mode, the four-way electromagnetic valve 2 controls a first flow path from a first inlet a to a first outlet b to be conducted, the four-way electromagnetic valve 2 controls a third flow path from the first inlet a to a second outlet c to be conducted, the first dual-way electromagnetic valve 6 controls a second flow path from a second inlet f to a fifth outlet g to be conducted, the second dual-way electromagnetic valve 10 controls a fourth flow path from a third inlet i to a seventh outlet j to be conducted, a refrigerant is compressed by the compressor 1 and then divided into two paths, the first path sequentially passes through the first flow path, the first condenser 3, the first throttling device 4, the first evaporator 5 and the second flow path, the second path sequentially passes through the third flow path, the second condenser 7, the second throttling device 8, the second evaporator 9 and the fourth flow path, and the first path and the second path are converged and return to the compressor 1 to form a circulation loop.
The first evaporator 5 and the second evaporator 9 participate in refrigeration at the same time in the deep cooling mode, so that the refrigerating capacity is improved, and the refrigerating efficiency is further improved.
In a defrosting mode of the first evaporator, the four-way electromagnetic valve 2 controls a fifth flow path from the first inlet a to the third outlet d to be communicated, the first dual-flow electromagnetic valve 6 controls a sixth flow path from the second inlet f to the sixth outlet h to be communicated, the second dual-flow electromagnetic valve 10 controls a fourth flow path from the third inlet i to the seventh outlet j to be communicated, and a refrigerant is compressed by the compressor 1 and then sequentially passes through the fifth flow path, the first evaporator 5, the sixth flow path, the second evaporator 9 and the fourth flow path to form a refrigerant circulation loop.
Under the defrosting mode of the first evaporator, a high-temperature and high-pressure refrigerant enters the first evaporator 5 to release heat, so that the defrosting purpose of the first evaporator 5 is achieved, at the moment, the first evaporator 5 is equivalent to a condenser, and then the refrigerant enters the second evaporator 9 to absorb heat, so that the refrigerating effect is achieved. Compared with the traditional heater for heating to defrost, the defrosting device has the advantages of high defrosting efficiency, low energy consumption, refrigeration while defrosting, and effective prevention of food deterioration.
Under a defrosting mode of a second evaporator, the four-way electromagnetic valve 2 controls a seventh flow path from the first inlet a to the fourth outlet e to be communicated, the second dual-pass electromagnetic valve 10 controls an eighth flow path from the third inlet i to the eighth outlet k to be communicated, the first dual-pass electromagnetic valve 6 controls a second flow path from the second inlet f to the fifth outlet g to be communicated, and a refrigerant is compressed by the compressor 1 and then sequentially passes through the seventh flow path, the second evaporator 9, the eighth flow path, the first evaporator 5 and the fourth flow path to form a refrigerant circulation loop.
In the defrosting mode of the second evaporator, a high-temperature and high-pressure refrigerant enters the second evaporator 9 to release heat, so that the purpose of defrosting the second evaporator 9 is achieved, at the moment, the second evaporator 9 is equivalent to a condenser, and then the refrigerant enters the first evaporator 5 to absorb heat, so that the refrigerating effect is achieved. Compared with the traditional heater for heating and defrosting, the defrosting device has the advantages of high defrosting efficiency, low energy consumption, refrigeration while defrosting, and effective prevention of food deterioration.
In summary, the refrigerator control system according to the embodiment of the invention has a deep cooling mode, and the first evaporator and the second evaporator participate in refrigeration at the same time, so that the refrigeration efficiency of the refrigerator is further improved, and low-temperature refrigeration is realized. Through changing the circulation path of refrigerant under the mode of changing the frost, compromise the refrigeration when changing the frost, it is efficient to change the frost, and the energy consumption is low, has avoided food to take place to deteriorate simultaneously effectively.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (7)
1. A refrigerator control system is characterized by comprising a refrigerant flow path, wherein a compressor, a four-way electromagnetic valve, a first condenser, a first throttling device, a first evaporator, a first double-way electromagnetic valve, a second condenser, a second throttling device, a second evaporator and a second double-way electromagnetic valve are arranged on the refrigerant flow path;
the four-way solenoid valve has a first inlet, a first outlet, a second outlet, a third outlet, and a fourth outlet, the first dual-way solenoid valve has a second inlet, a fifth outlet, and a sixth outlet, the second dual-way solenoid valve has a third inlet, a seventh outlet, and an eighth outlet;
the exhaust port of the compressor is connected with the first inlet;
the first outlet is connected with the inlet ends of the first condenser, the first throttling device and the first evaporator in sequence, the outlet end of the first evaporator is connected with the second inlet, and the fifth outlet is connected with the air suction port of the compressor;
the second outlet is connected with the second condenser, the second throttling device and the inlet end of the second evaporator in sequence, the outlet end of the second evaporator is connected with the third inlet, and the seventh outlet is connected with the air suction port of the compressor;
the third outlet is connected with the inlet end of the first evaporator;
the sixth outlet is connected with the inlet end of the second evaporator;
the fourth outlet is connected with the inlet end of the second evaporator;
the eighth outlet is connected with the inlet end of the first evaporator.
2. The control system of claim 1, wherein the system comprises a normal cooling mode, a deep cooling mode, a first evaporator defrost mode, and a second evaporator defrost mode.
3. The system as claimed in claim 2, wherein in the normal cooling mode, the four-way solenoid valve controls a first flow path from the first inlet to the first outlet to be conducted, the first dual-way solenoid valve controls a second flow path from the second inlet to the fifth outlet to be conducted, and the refrigerant passes through the compressor, the first flow path, the first condenser, the first throttling device, the first evaporator and the second flow path in sequence to form a refrigerant circulation loop.
4. The system as claimed in claim 2, wherein in the normal cooling mode, the four-way solenoid valve controls a third flow path from the first inlet to the second outlet to be conducted, the second dual-way solenoid valve controls a fourth flow path from the third inlet to the seventh outlet to be conducted, and the refrigerant passes through the compressor, the third flow path, the second condenser, the second throttling device, the second evaporator and the fourth flow path in sequence to form a refrigerant circulation loop.
5. The control system of claim 2, wherein in the deep cooling mode, the four-way solenoid valve controls a first flow path from the first inlet to the first outlet to be conducted, a third flow path from the first inlet to the second outlet to be conducted, the first dual-way solenoid valve controls a second flow path from the second inlet to the fifth outlet to be conducted, the second dual-way solenoid valve controls a fourth flow path from the third inlet to the seventh outlet to be conducted, the refrigerant passes through the compressor and then is divided into two paths, the first path sequentially passes through the first flow path, the first condenser, the first throttling device, the first evaporator and the second flow path, the second path sequentially passes through the third flow path, the second condenser, the second throttling device, the second evaporator and the fourth flow path, and the first path and the second path are converged and returned to the compressor to form a refrigerant circulation loop.
6. The refrigerator control system of claim 2, wherein in the first evaporator defrosting mode, the four-way solenoid valve controls a fifth flow path from the first inlet to the third outlet to be conducted, the first dual-way solenoid valve controls a sixth flow path from the second inlet to the sixth outlet to be conducted, the second dual-way solenoid valve controls a fourth flow path from the third inlet to the seventh outlet to be conducted, and the refrigerant sequentially passes through the compressor, the fifth flow path, the first evaporator, the sixth flow path, the second evaporator and the fourth flow path to form a refrigerant circulation loop.
7. The refrigerator control system of claim 2, wherein in the second evaporator defrosting mode, the four-way solenoid valve controls a seventh flow path from the first inlet to the fourth outlet to be conducted, the second dual-way solenoid valve controls an eighth flow path from the third inlet to the eighth outlet to be conducted, the first dual-way solenoid valve controls a second flow path from the second inlet to the fifth outlet to be conducted, and the refrigerant sequentially passes through the compressor, the seventh flow path, the second evaporator, the eighth flow path, the first evaporator and the fourth flow path to form a refrigerant circulation loop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211049314.1A CN115406137A (en) | 2022-08-30 | 2022-08-30 | Refrigerator control system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211049314.1A CN115406137A (en) | 2022-08-30 | 2022-08-30 | Refrigerator control system |
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| CN115406137A true CN115406137A (en) | 2022-11-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202211049314.1A Pending CN115406137A (en) | 2022-08-30 | 2022-08-30 | Refrigerator control system |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101532747A (en) * | 2009-04-21 | 2009-09-16 | 四川长虹电器股份有限公司 | An air-conditioner |
| CN106403466A (en) * | 2015-07-28 | 2017-02-15 | Lg电子株式会社 | Refrigerator |
| CN215059704U (en) * | 2021-05-18 | 2021-12-07 | 浙江盾安机械有限公司 | Reversing valve and air conditioning system with same |
| CN215892902U (en) * | 2021-06-29 | 2022-02-22 | 青岛海尔电冰箱有限公司 | Refrigerating and freezing device |
-
2022
- 2022-08-30 CN CN202211049314.1A patent/CN115406137A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101532747A (en) * | 2009-04-21 | 2009-09-16 | 四川长虹电器股份有限公司 | An air-conditioner |
| CN106403466A (en) * | 2015-07-28 | 2017-02-15 | Lg电子株式会社 | Refrigerator |
| CN215059704U (en) * | 2021-05-18 | 2021-12-07 | 浙江盾安机械有限公司 | Reversing valve and air conditioning system with same |
| CN215892902U (en) * | 2021-06-29 | 2022-02-22 | 青岛海尔电冰箱有限公司 | Refrigerating and freezing device |
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