CN112665241A - Frosting detection structure, condensing unit and defrosting method thereof - Google Patents
Frosting detection structure, condensing unit and defrosting method thereof Download PDFInfo
- Publication number
- CN112665241A CN112665241A CN202011434858.0A CN202011434858A CN112665241A CN 112665241 A CN112665241 A CN 112665241A CN 202011434858 A CN202011434858 A CN 202011434858A CN 112665241 A CN112665241 A CN 112665241A
- Authority
- CN
- China
- Prior art keywords
- vibration frequency
- evaporator
- sensor
- preset
- defrosting
- 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
Abstract
The invention discloses a frosting detection structure, a condensing unit and a defrosting method thereof, belonging to the field of defrosting; the specific frosting condition is known through the upper vibration frequency obtained by the upper sensor arranged on the evaporator fin at the upper air opening of the evaporator and the lower vibration frequency obtained by the lower sensor arranged on the evaporator fin at the lower air opening of the evaporator, so that whether the compressor of the unit is refrigerated or not and whether the defrosting module is started or not is controlled. The problem of the specific conditions of the frosting of unknown during defrosting in the past has been solved to the scheme of this application, and what can be accurate changes the frost, guarantees refrigeration efficiency when the energy saving.
Description
Technical Field
The invention relates to a defrosting technology, in particular to a frosting detection structure, a condensing unit and a defrosting method thereof.
Background
The condensing unit is used for refrigerating, and in the refrigerating process, the fins of the evaporator can frost, so that the refrigerating efficiency of the condensing unit is influenced after the frost is formed; therefore, defrosting of the evaporator is required. Generally, a condensing unit counts the running time T of a compressor through a timer, when the T is increased to a certain value, the compressor is disconnected for refrigeration, an electric heating deicing and defrosting module is started, and a refrigerator returns to the refrigeration state of the compressor again after heating defrosting is finished. However, the existing defrosting mode cannot be used for defrosting according to the actual frosting condition at the fin of the evaporator; the defrosting time is earlier, and energy is wasted; or the defrosting time is later, so that the refrigerating efficiency is influenced.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a frosting detection structure, a condensing unit and a defrosting method thereof, which aim to solve the problem that the existing defrosting mode can not carry out defrosting according to the actual frosting condition at the fin of an evaporator; the defrosting time is earlier, and energy is wasted; or the defrosting time is later, which affects the refrigeration efficiency.
The technical scheme adopted by the invention for solving the technical problems is as follows:
in a first aspect,
a frost detection structure comprising:
the upper sensor is arranged on an evaporator fin at an upper air inlet of the evaporator and used for acquiring the vibration frequency of the evaporator fin at the upper air inlet;
and the lower sensor is arranged on the evaporator fins at the lower air inlet of the evaporator and used for acquiring the vibration frequency of the evaporator fins at the lower air inlet.
Furthermore, at least two upper sensors are arranged on different evaporator fins at the upper air inlet of the evaporator.
Furthermore, the number of the lower sensors is at least two, and the lower sensors are arranged on different evaporator fins at a lower air inlet of the evaporator.
Further, the upper sensor and/or the lower sensor are flat-film piezoelectric resonant sensors.
In a second aspect of the present invention,
a condensing unit comprising: the structure according to any one of the above claims.
In a third aspect,
the defrosting method for the condensing unit in the technical scheme comprises the following steps:
respectively acquiring an upper vibration frequency and a lower vibration frequency through an upper sensor and a lower sensor, wherein the upper vibration frequency is the vibration frequency of an evaporator fin at an upper air inlet; the lower vibration frequency is the vibration frequency of the evaporator fin at the lower air inlet;
and controlling whether the compressor is refrigerated or not and whether the defrosting module is started or not according to the upper vibration frequency and the lower vibration frequency.
Further, whether the defrosting module is controlled to be opened or not according to the upper vibration frequency and the lower vibration frequency comprises:
when the upper vibration frequency is within a first preset frequency range and the lower vibration frequency is within a second preset frequency range, controlling the compressor to stop refrigerating and controlling the defrosting module to start;
after the defrosting module is started, when the upper vibration frequency and the lower vibration frequency are both in a third preset frequency range, controlling the defrosting module to be closed;
and after the defrosting module is closed, when the upper vibration frequency and the lower vibration frequency are within a fourth preset frequency range, controlling the compressor to start refrigerating.
Further, still include:
when the upper vibration frequency reaches a first preset frequency range, the lower vibration frequency is not detected to reach a second preset frequency range for a first preset time; judging the fault of the unit or the lower sensor;
when the lower vibration frequency reaches a second preset frequency range, the upper vibration frequency is not detected to reach the first preset frequency range for a second preset time; and judging the fault of the unit or the upper sensor.
Further, when the upper vibration frequency and the lower vibration frequency are the same and are not in a fourth preset range; and judging the failure of the evaporator fin.
Further, when the number of the upper sensor or the lower sensor is at least two, the method further comprises:
when the compressor starts to refrigerate, judging whether the upper vibration frequency of all the upper sensors or the lower vibration frequency of all the lower sensors is in a fourth preset frequency range;
when the upper vibration frequency of any upper sensor is not in a fourth preset frequency range and the duration time exceeds a third preset time length, judging that the unit or the upper sensor has a fault; and when the lower vibration frequency of any lower sensor is not in the fourth preset frequency range and the duration time exceeds the third preset time length, judging that the unit or the lower sensor has a fault.
This application adopts above technical scheme, possesses following beneficial effect at least:
the technical scheme of the application provides a frosting detects structure, condensation unit and method of defrosting thereof, learns specific frosting condition through last vibrational frequency that last sensor that sets up on the evaporimeter fin of wind gap department on the evaporimeter obtained and the lower vibrational frequency that the lower sensor that sets up on the evaporimeter fin of wind gap department under the evaporimeter obtained, and then whether the compressor of control unit refrigerates and whether the module of defrosting is opened. The problem of the specific conditions of the frosting of unknown during defrosting in the past has been solved to the scheme of this application, and what can be accurate changes the frost, guarantees refrigeration efficiency when the energy saving.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of a frosting detection structure according to an embodiment of the present invention;
FIG. 2 is a schematic view of another frosting detection structure provided by the embodiment of the present invention;
fig. 3 is a flowchart of a defrosting method of a condenser unit according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the following detailed description of the technical solutions of the present invention is provided with reference to the accompanying drawings and examples. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without making any creative effort, shall fall within the protection scope of the present application.
Referring to fig. 1, an embodiment of the present invention provides a frosting detection structure, including:
the upper sensor 11 is arranged on an evaporator fin 13 at an upper air inlet of the evaporator 10 and used for acquiring the vibration frequency of the evaporator fin at the upper air inlet;
and the lower sensor 12 is arranged on the evaporator fins at the lower wind port of the evaporator and used for acquiring the vibration frequency of the evaporator fins at the lower wind port.
Referring to fig. 1, the working principle of the frost detection structure according to the embodiment of the present invention is described, and the evaporator includes an evaporator fin and a refrigerant pipe 14. During refrigeration, a refrigerant passes through the refrigerant pipeline, so that the temperature of the evaporator fins of the refrigerant pipeline accessory is lower; the air then flows from the upper tuyere to the lower tuyere (from top to bottom in fig. 1), and frost starts to form when the air meets the evaporator fins. The evaporator has different vibration frequencies before and after frosting. The vibration frequency of the frost thickness has a linear relation, so that the frost thickness can be corresponding to the vibration frequency. Moreover, because the air meets the evaporator fins at the upper air inlet, the evaporator fins at the upper air inlet are frozen thickly at the same time; and the evaporator fins at the lower air inlet are frozen and thin. Therefore, the current frosting condition can be accurately judged according to the upper vibration frequency of the upper sensor and the lower vibration frequency of the lower sensor.
An embodiment of the present invention further provides another frost formation detection structure, as shown in fig. 2, including: the upper sensor 21 is arranged on an evaporator fin 23 at an upper air inlet of the evaporator 20 and used for acquiring the vibration frequency of the evaporator fin at the upper air inlet;
and the lower sensor 22 is arranged on the evaporator fins at the lower wind port of the evaporator and is used for acquiring the vibration frequency of the evaporator fins at the lower wind port.
The upper sensors are at least two (only two are shown in figure 2) and are arranged on different evaporator fins at the air inlet of the evaporator. The lower sensors are at least two and are arranged on different evaporator fins at the lower air inlet of the evaporator.
As a preferred implementation manner of the embodiment of the present invention, the upper sensor and/or the lower sensor both use a flat-film piezoelectric resonant sensor.
According to the frosting detection structure provided by the embodiment of the invention, the plurality of upper sensors or lower sensors are arranged to detect the vibration frequencies at a plurality of positions, so that the frosting condition of the whole evaporator can be more accurately judged.
In an embodiment, the invention further provides a condensing unit comprising the frosting detection structure provided by the embodiment, and the condensing unit provided by the embodiment of the invention can acquire the frosting condition according to the frosting detection structure and control the unit to defrost, so that the problem that the specific frosting condition cannot be known during defrosting is solved, defrosting can be carried out in time, energy sources cannot be wasted, and the refrigerating efficiency of the unit cannot be influenced.
In an embodiment, an embodiment of the present invention provides a defrosting method for a condensing unit, as shown in fig. 3, including the following steps:
respectively acquiring an upper vibration frequency and a lower vibration frequency through an upper sensor and a lower sensor, wherein the upper vibration frequency is the vibration frequency of the evaporator fin at the upper air inlet; the lower vibration frequency is the vibration frequency of the evaporator fin at the lower air inlet;
and controlling whether the compressor is refrigerated or not and whether the defrosting module is started or not according to the upper vibration frequency and the lower vibration frequency.
As an optional implementation manner of the embodiment of the present invention, controlling whether the defrosting module is turned on according to the upper vibration frequency and the lower vibration frequency includes:
when the upper vibration frequency is within a first preset frequency range and the lower vibration frequency is within a second preset frequency range, controlling the compressor to stop refrigerating and controlling the defrosting module to start; and stopping the refrigeration of the compressor and starting a defrosting module to defrost when the frosting thickness reaches the condition of defrosting. It should be noted that the first preset frequency range and the second preset frequency range are frequency ranges corresponding to the frosting thickness when defrosting is required.
After the defrosting module is started, when the upper vibration frequency and the lower vibration frequency are both in a third preset frequency range, controlling the defrosting module to be closed; at the moment, the defrosting module turns the frost into water, the water drops downwards from the evaporator fin, and the vibration frequency at the moment is different from the vibration frequency during frosting and is also different from the normal vibration frequency; the defrosting module does not need to be started at the moment. Therefore, the third predetermined frequency range is the vibration frequency when water drops.
And after the defrosting module is closed, controlling the compressor to start refrigerating when the upper vibration frequency and the lower vibration frequency are within the fourth preset frequency range. At this time, the water is completely dripped, and the vibration frequency is recovered to the vibration frequency without frosting, so that the fourth preset frequency range is the vibration frequency without frosting.
In the actual working process, the unit or the sensor is difficult to avoid faults, so in some optional embodiments, after the upper vibration frequency reaches the first preset frequency range, the lower vibration frequency is not detected to reach the second preset frequency range for the first preset time; judging the fault of the unit or the lower sensor;
after the lower vibration frequency reaches a second preset frequency range, the upper vibration frequency is not detected to reach the first preset frequency range for a second preset time; and judging the faults of the set or the upper sensor.
After defrosting, when the upper vibration frequency and the lower vibration frequency are the same and are not in the fourth preset range; and judging the failure of the evaporator fin.
As an optional implementation manner of the embodiment of the present invention, when there are at least two upper sensors or at least two lower sensors, the method further includes:
when the compressor starts to refrigerate, judging whether the upper vibration frequency of all the upper sensors or the lower vibration frequency of all the lower sensors is in a fourth preset frequency range;
when the upper vibration frequency of any upper sensor is not in the fourth preset frequency range and the duration time exceeds the third preset time length, judging that the unit or the upper sensor has a fault; and when the lower vibration frequency of any lower sensor is not in the fourth preset frequency range and the duration time exceeds the third preset time length, judging that the unit or the lower sensor has a fault.
According to the defrosting method provided by the embodiment of the invention, the specific frosting condition is known through the upper vibration frequency acquired by the upper sensor and the lower vibration frequency acquired by the lower sensor, so that whether a compressor of a unit is refrigerated or not and whether a defrosting module is started or not are controlled. The problem of the specific conditions of the frosting of unknown during defrosting in the past has been solved to the scheme of this application, and what can be accurate changes the frost, guarantees refrigeration efficiency when the energy saving.
It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar parts in other embodiments may be referred to for the content which is not described in detail in some embodiments.
It should be noted that, in the description of the present application, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Further, in the description of the present application, the meaning of "a plurality" means at least two unless otherwise specified.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and the scope of the preferred embodiments of the present application includes other implementations in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present application.
It should be understood that portions of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present application may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc.
In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.
Claims (10)
1. A frost detection structure, comprising:
the upper sensor is arranged on an evaporator fin at an upper air inlet of the evaporator and used for acquiring the vibration frequency of the evaporator fin at the upper air inlet;
and the lower sensor is arranged on the evaporator fins at the lower air inlet of the evaporator and used for acquiring the vibration frequency of the evaporator fins at the lower air inlet.
2. The structure of claim 1, wherein: the upper sensors are at least two and are arranged on different evaporator fins at an upper air inlet of the evaporator.
3. The structure of claim 1, wherein: the number of the lower sensors is at least two, and the lower sensors are arranged on different evaporator fins at the lower air inlet of the evaporator.
4. A structure according to any one of claims 1 to 3, characterized in that: the upper sensor and/or the lower sensor are flat-film piezoelectric resonant sensors.
5. A condensing unit, comprising: the structure of any one of claims 1-4.
6. A defrosting method of a condensing unit according to claim 5, comprising the following steps:
respectively acquiring an upper vibration frequency and a lower vibration frequency through an upper sensor and a lower sensor, wherein the upper vibration frequency is the vibration frequency of an evaporator fin at an upper air inlet; the lower vibration frequency is the vibration frequency of the evaporator fin at the lower air inlet;
and controlling whether the compressor is refrigerated or not and whether the defrosting module is started or not according to the upper vibration frequency and the lower vibration frequency.
7. The method of claim 6, wherein: whether the frost removal module of control opens according to go up vibration frequency and vibration frequency down includes:
when the upper vibration frequency is within a first preset frequency range and the lower vibration frequency is within a second preset frequency range, controlling the compressor to stop refrigerating and controlling the defrosting module to start;
after the defrosting module is started, when the upper vibration frequency and the lower vibration frequency are both in a third preset frequency range, controlling the defrosting module to be closed;
and after the defrosting module is closed, when the upper vibration frequency and the lower vibration frequency are within a fourth preset frequency range, controlling the compressor to start refrigerating.
8. The method of claim 7, further comprising:
when the upper vibration frequency reaches a first preset frequency range, the lower vibration frequency is not detected to reach a second preset frequency range for a first preset time; judging the fault of the unit or the lower sensor;
when the lower vibration frequency reaches a second preset frequency range, the upper vibration frequency is not detected to reach the first preset frequency range for a second preset time; and judging the fault of the unit or the upper sensor.
9. The method of claim 7, wherein: when the upper vibration frequency and the lower vibration frequency are the same and are not in a fourth preset range; and judging the failure of the evaporator fin.
10. The method of claim 7, wherein: when the number of the upper sensor or the lower sensor is at least two, the method further comprises the following steps:
when the compressor starts to refrigerate, judging whether the upper vibration frequency of all the upper sensors or the lower vibration frequency of all the lower sensors is in a fourth preset frequency range;
when the upper vibration frequency of any upper sensor is not in a fourth preset frequency range and the duration time exceeds a third preset time length, judging that the unit or the upper sensor has a fault; and when the lower vibration frequency of any lower sensor is not in the fourth preset frequency range and the duration time exceeds the third preset time length, judging that the unit or the lower sensor has a fault.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011434858.0A CN112665241A (en) | 2020-12-10 | 2020-12-10 | Frosting detection structure, condensing unit and defrosting method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011434858.0A CN112665241A (en) | 2020-12-10 | 2020-12-10 | Frosting detection structure, condensing unit and defrosting method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112665241A true CN112665241A (en) | 2021-04-16 |
Family
ID=75401721
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011434858.0A Pending CN112665241A (en) | 2020-12-10 | 2020-12-10 | Frosting detection structure, condensing unit and defrosting method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112665241A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115264759A (en) * | 2022-07-04 | 2022-11-01 | 珠海格力电器股份有限公司 | Pneumatic induction mechanism, defrosting device, air conditioning system and control method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4176524A (en) * | 1976-11-10 | 1979-12-04 | Matsushita Electric Industrial Co., Ltd. | Frost detector |
| CN106403093A (en) * | 2015-07-30 | 2017-02-15 | 杭州三花研究院有限公司 | Heat pump air conditioning system, heat exchanger and control method of heat pump air conditioning system |
| CN209326560U (en) * | 2018-12-24 | 2019-08-30 | 天津天商酷凌科技有限公司 | A kind of condenser type multiple-effect frost sensor that evaporator has |
| CN110567357A (en) * | 2019-09-26 | 2019-12-13 | 成都凯天电子股份有限公司 | Dynamic strain piezoelectric ceramic icing detection sensor |
| CN211261438U (en) * | 2019-11-19 | 2020-08-14 | 浙江工业大学 | Defrosting control system based on fan vibration and information fusion |
-
2020
- 2020-12-10 CN CN202011434858.0A patent/CN112665241A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4176524A (en) * | 1976-11-10 | 1979-12-04 | Matsushita Electric Industrial Co., Ltd. | Frost detector |
| CN106403093A (en) * | 2015-07-30 | 2017-02-15 | 杭州三花研究院有限公司 | Heat pump air conditioning system, heat exchanger and control method of heat pump air conditioning system |
| CN209326560U (en) * | 2018-12-24 | 2019-08-30 | 天津天商酷凌科技有限公司 | A kind of condenser type multiple-effect frost sensor that evaporator has |
| CN110567357A (en) * | 2019-09-26 | 2019-12-13 | 成都凯天电子股份有限公司 | Dynamic strain piezoelectric ceramic icing detection sensor |
| CN211261438U (en) * | 2019-11-19 | 2020-08-14 | 浙江工业大学 | Defrosting control system based on fan vibration and information fusion |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115264759A (en) * | 2022-07-04 | 2022-11-01 | 珠海格力电器股份有限公司 | Pneumatic induction mechanism, defrosting device, air conditioning system and control method |
| CN115264759B (en) * | 2022-07-04 | 2023-11-03 | 珠海格力电器股份有限公司 | Pneumatic sensing mechanism, defrosting device, air conditioning system and control method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4365378B2 (en) | Defrosting operation control device and defrosting operation control method | |
| CN109579231B (en) | Water pan fault detection and control method and device | |
| CN110762754B (en) | Intelligent defrosting method and system for air conditioner and air conditioner | |
| CN111076460B (en) | Defrosting control method and refrigerator | |
| CN111503994B (en) | Control method of air-cooled refrigerator and air-cooled refrigerator | |
| CN111322812A (en) | Control method and control device for intelligently defrosting air-cooled refrigerator and refrigerator | |
| JP2020056509A (en) | Refrigerant leakage determination device, freezing device with refrigerant leakage determination device, and refrigerant leakage determination method | |
| CN111811198A (en) | Defrosting control method and device and electric equipment | |
| CN111089393A (en) | Intelligent defrosting method and device for air cooler and controller | |
| CN113739460B (en) | Evaporator defrosting treatment method and device and heat pump equipment | |
| CN112665241A (en) | Frosting detection structure, condensing unit and defrosting method thereof | |
| CN104329897A (en) | Defrosting control method and system for compression refrigerator | |
| WO2023035997A1 (en) | Refrigerator control method and refrigerator | |
| CN114279162B (en) | Control method and device of air-cooled refrigerator and refrigerator | |
| JP3034781B2 (en) | refrigerator | |
| CN113154790B (en) | Refrigerator control method and device and refrigerator | |
| JPH0534049A (en) | Defrosting operation control device for freezing device for container | |
| CN113503675A (en) | Refrigerator defrosting demand judgment method | |
| CN112556291A (en) | Defrosting control method of air-cooled refrigerator and air-cooled refrigerator | |
| CN113739464B (en) | Method and device for controlling defrosting of direct expansion unit and related equipment | |
| CN111076461A (en) | Defrosting control method and device for refrigeration equipment and refrigeration equipment | |
| CN106996675A (en) | refrigeration temperature control intelligent defrosting control device | |
| CN115406151B (en) | Instantaneous freezing control method, device and system for freezing chamber of refrigerator and refrigerator | |
| CN112146348B (en) | Control method and control device for detecting flash seam of refrigerator door and refrigerator | |
| CN112146345B (en) | Refrigerator door flash seam detection method, control device and refrigerator |
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 |