CN112393477A - Defrosting control method and refrigeration equipment adopting same - Google Patents

Defrosting control method and refrigeration equipment adopting same Download PDF

Info

Publication number
CN112393477A
CN112393477A CN202011364913.3A CN202011364913A CN112393477A CN 112393477 A CN112393477 A CN 112393477A CN 202011364913 A CN202011364913 A CN 202011364913A CN 112393477 A CN112393477 A CN 112393477A
Authority
CN
China
Prior art keywords
evaporator
defrosting
control method
compressor
refrigerant
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.)
Withdrawn
Application number
CN202011364913.3A
Other languages
Chinese (zh)
Inventor
石祎明
李全星
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.)
Gree Electric Appliances Inc of Zhuhai
Original Assignee
Gree Electric Appliances Inc of Zhuhai
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 Gree Electric Appliances Inc of Zhuhai filed Critical Gree Electric Appliances Inc of Zhuhai
Priority to CN202011364913.3A priority Critical patent/CN112393477A/en
Publication of CN112393477A publication Critical patent/CN112393477A/en
Withdrawn legal-status Critical Current

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
    • 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
    • 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
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
    • F25D21/002—Defroster control
    • F25D21/004—Control mechanisms
    • 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
    • F25D21/06—Removing frost
    • F25D21/08—Removing frost by electric heating
    • 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
    • F25D29/00—Arrangement or mounting of control or safety devices
    • F25D29/003—Arrangement or mounting of control or safety devices for movable devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D29/00—Arrangement or mounting of control or safety devices
    • F25D29/005—Mounting of control devices

Abstract

The invention discloses a defrosting control method and a refrigeration device adopting the defrosting control method, wherein the refrigeration device comprises: the defrosting control method comprises the following steps of: judging whether the refrigeration equipment needs defrosting or not; if yes, executing the refrigerant transferring action to reduce the refrigerant amount in the evaporator; and judging whether the refrigerant transferring action is finished or not, and if so, heating the evaporator to defrost. Before defrosting of the evaporator, the refrigerant in the evaporator is transferred outwards, so that the amount of the refrigerant in the evaporator is reduced, the heat required to be absorbed by the refrigerant in the evaporator during phase change is reduced, the defrosting efficiency of the evaporator is improved, and the defrosting time is shortened.

Description

Defrosting control method and refrigeration equipment adopting same
Technical Field
The invention relates to the technical field of refrigeration equipment, in particular to a defrosting control method and refrigeration equipment adopting the defrosting control method.
Background
In the daily life of refrigeration equipment widely used, a refrigerator is the most common refrigeration equipment, and the defrosting process of a frost-free refrigerator in the industry at present is mainly realized by immediately and forcibly heating an evaporator after the refrigeration stage is finished until the defrosting requirement is met. However, at the end of the refrigeration stage, a large amount of liquid refrigerant exists in the evaporator, the phase change point of frost on the surface of the evaporator is 0 ℃, and the phase change point of the refrigerant used by most refrigerators is-20 to-35 ℃, so that the refrigerant is subjected to phase change before the frost in the defrosting process of heating the evaporator, a large amount of heat is consumed in the phase change process, the defrosting on the surface of the evaporator is not facilitated, the defrosting time is long, and the power consumption caused by defrosting is increased.
Therefore, how to design a defrosting control method for effectively improving defrosting efficiency is a technical problem to be solved in the industry.
Disclosure of Invention
In order to solve the defects in the prior art, the invention provides a defrosting control method and refrigeration equipment adopting the defrosting control method.
The technical scheme adopted by the invention is that a defrosting control method of refrigeration equipment is designed, and the refrigeration equipment comprises the following components: the defrosting control method comprises the following steps of: judging whether the refrigeration equipment needs defrosting or not; if yes, executing the refrigerant transferring action to reduce the refrigerant amount in the evaporator; and judging whether the refrigerant transferring action is finished or not, and if so, heating the evaporator to defrost.
Preferably, the judging whether the refrigeration equipment needs defrosting includes: collecting the running time of a compressor; judging whether the running time meets the set starting defrosting time or not; and if so, judging that the refrigeration equipment needs defrosting.
Preferably, the refrigerant transferring operation includes: judging whether the compressor is in a starting state or not; if yes, closing an outlet of the condenser and maintaining the starting state of the compressor; if not, the outlet of the refrigerant device is closed, and the compressor is started.
Preferably, the judging whether the refrigerant transferring operation is completed includes: and after the outlet of the condenser is closed, timing the starting operation time of the compressor, and when the starting operation time reaches the set delay time, closing the compressor and judging that the refrigerant transferring action is finished.
Preferably, the outlet of the condenser is kept closed while the evaporator is heated for defrosting.
Preferably, after the evaporator is heated to defrost, whether the evaporator is defrosted is judged, if yes, an outlet of the condenser is opened, the compressor is started in a delayed mode, and a fan of the evaporator is started later than the compressor.
Preferably, the judging whether defrosting of the evaporator is completed includes: collecting the tube temperature of the evaporator, judging whether the tube temperature reaches a set temperature, if so, stopping heating the evaporator and judging that the defrosting of the evaporator is finished.
Preferably, the rotation speed when the compressor is started is the set optimal starting rotation speed.
The invention also provides refrigeration equipment adopting the defrosting control method, wherein an evaporator of the refrigeration equipment is provided with a defrosting heater for providing heat during defrosting, and the outlet of the condenser is provided with a stop valve.
In one embodiment, the refrigeration appliance is a refrigerator.
Compared with the prior art, the invention reduces the amount of the refrigerant in the evaporator by transferring the refrigerant in the evaporator outwards before defrosting the evaporator, reduces the heat quantity which needs to be absorbed by the phase change of the refrigerant in the evaporator, improves the defrosting efficiency of the evaporator and shortens the defrosting time. Compared with the existing defrosting method, the defrosting control method can greatly reduce the power consumption, can effectively reduce the room temperature rise amplitude caused by the defrosting process, and is favorable for ensuring that refrigeration equipment such as a refrigerator meets the standard requirement that the room temperature rise of a frostless refrigeration appliance does not exceed 3K in the defrosting and recovery periods.
Drawings
The invention is described in detail below with reference to examples and figures, in which:
fig. 1 is a schematic view of piping connections of a refrigeration apparatus according to an embodiment of the present invention.
Detailed Description
As shown in fig. 1, the defrosting control method provided by the present invention is applied to a refrigeration device, and is described by taking a common refrigeration device, namely a refrigerator, as an example, where all of the refrigerators mentioned herein are replaced by refrigeration devices, the refrigerator includes: the compressor 1, the condenser 2, the throttling element 5 and the evaporator 4 are connected in sequence, the compressor 1, the condenser 2, the throttling element 5 and the evaporator 4 are connected to form a refrigeration circuit allowing a refrigerant to circularly flow, and the throttling element 5 can be a capillary tube. When the refrigerator operates in a refrigerating mode, the compressor 1 is started, refrigerant is compressed by the compressor 1, then condensed in the condenser 2, throttled by the throttling element 5, enters the evaporator 4 to absorb heat for evaporation, and then returns to the compressor 1 again, and the refrigerating cycle is completed. After the refrigeration cycle is started and stopped for a certain number of cycles, because frost is attached to the evaporator 4 due to continuous low temperature, forced defrosting of the evaporator 4 is required.
The specific steps of the defrosting control method are described in detail below with reference to the examples.
The first step, judge whether the refrigerator needs to change the frost, carry on the second step when the refrigerator needs to change the frost.
The existing defrosting start judgment logic can be adopted for whether the refrigerator is defrosted, for example, according to the pipe temperature of the evaporator 4, the running time of the compressor 1 and the like, taking the running time of the compressor 1 as an example, judging whether the refrigerator needs defrosting includes collecting the running time of the compressor 1, judging whether the running time meets the set starting defrosting time, and if so, judging that the refrigerator needs defrosting.
And the second step, executing the refrigerant transferring action to reduce the refrigerant amount in the evaporator 4, judging whether the refrigerant transferring action is finished or not, and executing the third step when the refrigerant transferring action is finished.
The refrigerant transfer operation is to transfer the refrigerant in the evaporator 4 to the outside, so that the amount of the refrigerant in the evaporator 4 is reduced, and various methods are available for the refrigerant transfer operation. In a preferred embodiment of the present invention, a stop valve 3 is installed at the outlet of the condenser 2, and the stop valve 3 is closed to close the outlet of the condenser 2, and the refrigerant transferring action includes: judging whether the compressor 1 is in a starting state or not; when the compressor 1 is in a starting state, closing the stop valve 3, maintaining the starting state of the compressor 1, and transferring the refrigerant in the evaporator 4 to the condenser 2 by using the compressor 1 while continuously cooling the compartment; when the compressor 1 is in a shutdown state, the stop valve 3 is closed, the compressor 1 is started, and the refrigerant in the evaporator 4 is transferred to the condenser 2 by the compressor 1 while the compartment is continuously cooled.
Judging whether the refrigerant transferring action is completed comprises the following steps: and after the stop valve is closed, timing the starting operation time of the compressor 1, and when the starting operation time reaches the set delay time, closing the compressor 1 and judging that the refrigerant transferring action is finished. That is, after the stop valve 3 is closed, the compressor 1 is delayed to be closed, so that the refrigerant in the evaporator 4 is transferred outward, and when the delay time reaches the set delay time, the amount of the remaining refrigerant in the evaporator 4 is small, so that the compressor 1 can be closed to finish the refrigerant transfer operation, that is, it is determined that the refrigerant transfer operation is completed. In the process of executing the refrigerant transferring action, because the refrigerant in the evaporator 4 is gradually reduced, the refrigerating capacity of the refrigerating circuit is reduced along with the refrigerant transferring action, and in order to ensure that the temperature of the compartment after the process is finished is lower than that of the compartment in the normal refrigerating stage, a proper fixed time t needs to be set for the process, different refrigerators have different characteristics, and the length of the set delay time is recommended to be 1 h-2 h.
And step three, heating the evaporator 4 to defrost, judging whether the evaporator 4 is defrosted completely, and performing the step four when the evaporator 4 is defrosted completely.
In order to prevent the refrigerant from flowing into the evaporator 4 when the evaporator 4 is defrosted, the stop valve 3 is kept closed during the defrosting process of the evaporator. In a preferred embodiment of the present invention, the evaporator 4 is provided with a defrosting heater 6 and a tube temperature sensor, the defrosting heater 6 supplying heat to the evaporator 4 when the evaporator 4 is defrosted, the tube temperature sensor detecting the tube temperature of the evaporator 4. When the refrigerant transferring action is finished, the residual liquid refrigerant in the evaporator 4 is not much, the heat provided by the defrosting heater 6 is fully utilized to melt the frost on the surface of the evaporator 4, and the residual refrigerant in the pipeline is not greatly consumed due to evaporation, so that the working time of the defrosting heater 6 is shortened, and the purpose of reducing the power consumption increment caused by defrosting is achieved. Meanwhile, the working time of the defrosting heater 6 is shortened, the heat release effect on the compartment is weakened, the compartment temperature is protected, and the standard requirement that the temperature rise of the compartment of the frost-free refrigeration appliance does not exceed 3K in the defrosting and recovery periods is met.
Whether defrosting of the evaporator 4 is completed or not may be determined by using an existing defrosting end determination logic, for example, according to a tube temperature of the evaporator, a heating time of the evaporator, and the like, taking the tube temperature of the evaporator 4 as an example, determining whether defrosting of the evaporator 4 is completed or not includes: and collecting the tube temperature of the evaporator 4, judging whether the tube temperature reaches a set temperature, if so, closing the defrosting heater 6 and judging that the defrosting of the evaporator 4 is finished.
And fourthly, opening an outlet of the condenser 2, delaying to start the compressor 1, and starting a fan of the evaporator 4 later than the compressor 1.
After defrosting of the evaporator is completed, the compressor 1 is kept in a stop state, the stop valve 3 is opened, refrigerant enters the evaporator 4 from the condenser 2 under the action of pressure difference, and the process is used for balancing the pressure between the high-pressure end and the low-pressure end of the refrigeration circuit. After the stop valve 3 is opened for a certain time, the compressor 1 is started, the compressor 1 is controlled according to the set optimal starting rotating speed when being started, the set optimal starting rotating speed needs to be designed according to the self characteristics of the compressor, the fan of the evaporator 4 is started later than the compressor, namely, after the compressor 1 is started for a certain time, the fan of the evaporator 4 is started, and the starting failure of the compressor caused by overhigh pressure of refrigerant in the condenser 2 is avoided.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims (12)

1. A defrosting control method of a refrigeration apparatus, the refrigeration apparatus comprising: the compressor, the condenser, the throttling element and the evaporator are connected in sequence; the defrosting control method is characterized by comprising the following steps:
judging whether the refrigeration equipment needs defrosting or not;
if yes, executing a refrigerant transferring action to reduce the amount of the refrigerant in the evaporator;
and judging whether the refrigerant transferring action is finished or not, and if so, heating the evaporator to defrost.
2. The defrosting control method according to claim 1, wherein determining whether the refrigeration apparatus needs defrosting includes:
collecting the running time of the compressor;
judging whether the running time meets the set starting defrosting time or not;
and if so, judging that the refrigeration equipment needs defrosting.
3. The defrosting control method according to claim 1, wherein the refrigerant transferring operation includes:
judging whether the compressor is in a starting state or not;
if so, closing an outlet of the condenser and maintaining the starting state of the compressor;
if not, the outlet of the refrigerant device is closed, and the compressor is started.
4. The defrosting control method of claim 3, wherein determining whether the refrigerant transferring action is completed comprises: and after the outlet of the condenser is closed, timing the starting operation time of the compressor, and when the starting operation time reaches the set delay time, closing the compressor and judging that the refrigerant transferring action is finished.
5. The defrosting control method of claim 1 wherein the outlet of the condenser is maintained in a closed state while the evaporator is heated for defrosting.
6. The defrosting control method according to any one of claims 1 to 5, wherein after the evaporator is heated for defrosting, whether the evaporator is defrosted is judged, if yes, an outlet of the condenser is opened, and the compressor is started with a delay.
7. The defrosting control method of claim 6, wherein determining whether defrosting of the evaporator is completed comprises: collecting the temperature of the evaporator, judging whether the temperature of the evaporator reaches a set temperature, if so, stopping heating the evaporator and judging that defrosting of the evaporator is finished.
8. The defrosting control method of claim 6 wherein the fan of the evaporator is turned on later than the compressor.
9. The defrosting control method according to claim 6, wherein the rotation speed at which the compressor is turned on is a set optimum start-up rotation speed.
10. A refrigerating apparatus, characterized in that it employs the defrosting control method according to any one of claims 1 to 9.
11. The refrigeration apparatus as claimed in claim 10, wherein the evaporator is provided with a defrosting heater for providing heat when defrosting, and the outlet of the condenser is provided with a shutoff valve.
12. The refrigeration appliance of claim 10 wherein the refrigeration appliance is a refrigerator.
CN202011364913.3A 2020-11-27 2020-11-27 Defrosting control method and refrigeration equipment adopting same Withdrawn CN112393477A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011364913.3A CN112393477A (en) 2020-11-27 2020-11-27 Defrosting control method and refrigeration equipment adopting same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011364913.3A CN112393477A (en) 2020-11-27 2020-11-27 Defrosting control method and refrigeration equipment adopting same

Publications (1)

Publication Number Publication Date
CN112393477A true CN112393477A (en) 2021-02-23

Family

ID=74605450

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202011364913.3A Withdrawn CN112393477A (en) 2020-11-27 2020-11-27 Defrosting control method and refrigeration equipment adopting same

Country Status (1)

Country Link
CN (1) CN112393477A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113915870A (en) * 2021-03-05 2022-01-11 海信（山东）冰箱有限公司 Refrigerator and control method thereof

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11132635A (en) * 1997-10-31 1999-05-21 Matsushita Refrig Co Ltd Refrigerator
CN105758077A (en) * 2016-04-13 2016-07-13 青岛海尔股份有限公司 Refrigerator and control method thereof
CN107894058A (en) * 2017-11-03 2018-04-10 宁波奥克斯电气股份有限公司 A kind of air-conditioning state control method and device
CN108603712A (en) * 2016-04-13 2018-09-28 松下知识产权经营株式会社 Freezer and cooling system
CN110094904A (en) * 2019-03-18 2019-08-06 珠海格力电器股份有限公司 Except defrosting system, control method, device and refrigeration equipment

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11132635A (en) * 1997-10-31 1999-05-21 Matsushita Refrig Co Ltd Refrigerator
CN105758077A (en) * 2016-04-13 2016-07-13 青岛海尔股份有限公司 Refrigerator and control method thereof
CN108603712A (en) * 2016-04-13 2018-09-28 松下知识产权经营株式会社 Freezer and cooling system
CN107894058A (en) * 2017-11-03 2018-04-10 宁波奥克斯电气股份有限公司 A kind of air-conditioning state control method and device
CN110094904A (en) * 2019-03-18 2019-08-06 珠海格力电器股份有限公司 Except defrosting system, control method, device and refrigeration equipment

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113915870A (en) * 2021-03-05 2022-01-11 海信（山东）冰箱有限公司 Refrigerator and control method thereof

Similar Documents

Publication Publication Date Title
JP5575192B2 (en) Dual refrigeration equipment
EP1912029B1 (en) Refrigeration unit
CN101258369B (en) Refrigeration device
CN109869954B (en) Air source heat pump water heater and defrosting method thereof
JP5575191B2 (en) Dual refrigeration equipment
JP2010532462A (en) High temperature gas defrosting method and apparatus
CN105135772B (en) Water refrigerating plant and its control method for preventing cold water from freezing
JP2012207803A (en) Control method of air conditioner
KR20090046152A (en) Controlling method for the refrigerator
CN104697276B (en) There is the air cooling type refrigerator of heat pipe type thermal storage defrosting mechanism
JP2003240391A (en) Air conditioner
CN210801680U (en) Cold and warm dual-purpose air source heat pump system
JP5558132B2 (en) Refrigerator and refrigeration apparatus to which the refrigerator is connected
CN112393477A (en) Defrosting control method and refrigeration equipment adopting same
CN110940136B (en) Refrigerator refrigerating system and defrosting control method thereof
CN106091457B (en) Refrigeration system and its control method and control device, refrigerator
CN206269436U (en) A kind of flow controller for adapting to cryogenic quick freezing
JP2008121918A (en) Air conditioner
CN107023917B (en) Air conditioner and refrigerator integrated machine and operation control method thereof
CN105222517A (en) The control method of refrigerator, the control device of refrigerator and refrigerator
JP6048549B1 (en) Refrigeration equipment
CN113720088A (en) Refrigerating and freezing device and control method thereof
CN111947379A (en) Air conditioning unit capable of effectively utilizing energy and control method and device thereof
US20220057122A1 (en) Refrigeration cycle apparatus
CN112856889B (en) Refrigerator and control method thereof

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
WW01 Invention patent application withdrawn after publication
WW01 Invention patent application withdrawn after publication

Application publication date: 20210223