CN114413564A - Method for preventing fire of refrigerator - Google Patents
Method for preventing fire of refrigerator Download PDFInfo
- Publication number
- CN114413564A CN114413564A CN202210083126.4A CN202210083126A CN114413564A CN 114413564 A CN114413564 A CN 114413564A CN 202210083126 A CN202210083126 A CN 202210083126A CN 114413564 A CN114413564 A CN 114413564A
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- CN
- China
- Prior art keywords
- defrosting
- temperature
- refrigerator
- defrosting heater
- heater
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- 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.)
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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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D29/00—Arrangement or mounting of control or safety devices
- F25D29/006—Safety devices
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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
- 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
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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
- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Defrosting Systems (AREA)
Abstract
The invention discloses a method for preventing a refrigerator from being ignited, and relates to the technical field of refrigerator safety. The method is intelligently controlled by a control system consisting of a control module, a defrosting heater, a temperature sensing module and a WIFI module, and the state of the defrosting heater is monitored by the control module. When the defrosting heater is in an open state, the temperature sensing module monitors the real-time temperature of each sensor: if the temperature of the K-type thermocouple is less than 394 ℃ and the temperature of the defrosting sensor is higher than the exit temperature, the defrosting heater is turned off; and if the temperature of the K-type thermocouple is higher than 394 ℃ and the temperature of the defrosting sensor is lower than the exit temperature, forcibly turning off the defrosting heater, and recording the forced turning-off times of the defrosting heater as n. If n is less than 2, judging that the defrosting system is not abnormal; and if n is larger than or equal to 2, judging that the defrosting system is abnormal, and sending early warning information to the user and the manufacturer by the WIFI module. The invention controls the highest working temperature of the defrosting heater by monitoring the surface temperature of the defrosting heater in real time, and further guarantees the safety of the refrigerator in the aspect of software control.
Description
Technical Field
The invention belongs to the technical field of refrigerator safety, and particularly relates to a method for preventing a refrigerator from being ignited.
Background
The air-cooled refrigerator is widely popularized in the household appliance market, and the defrosting electric heater in the air-cooled refrigerator can automatically melt frost accumulated on the surface of the evaporator when working without manual defrosting by a user. In the working process of the electric heater, the surface temperature of the electric heater can be increased to 394 ℃ (the surface temperature of the defrosting heater of the refrigerator is not higher than 394 ℃ according to the national standard requirement), and the highest working temperature of the surface of the defrosting electric heater can be controlled during the design of the frostless refrigerator. Generally, the temperature control of the defrosting electric heater is realized by connecting a temperature fuse in series on leads at two ends of the defrosting electric heater respectively. The temperature fuse can be immediately fused when reaching a specific temperature, the working loop of the defrosting electric heater is cut off, and the electric heater is forcibly stopped.
If the temperature fuse is short-circuited due to unqualified quality or other external factors during the use process of a user, the defrosting heater loses the only temperature control component, the temperature of the defrosting heater can continuously rise, and the refrigerator is likely to be ignited. The R600a refrigerant, which is commonly used in refrigerators, is subject to explosion under certain high temperature conditions. If the heater encounters refrigerant leakage after being out of control, the consequences can not be imagined.
The temperature fuse can play the restriction effect to the operating temperature of defrosting electric heater, and once failing, the result will be very serious. The refrigerator after-sale data can be used for obtaining that many brands have the refrigerator burning accident. Such failures bring great loss to users and also bring adverse side effects to household electrical appliances manufacturers.
Disclosure of Invention
The invention aims to provide a method for preventing a refrigerator from being ignited, which provides further safety guarantee for the refrigerator in the aspect of software control by monitoring the surface temperature of a defrosting heater in real time and controlling the highest working temperature of the defrosting heater at the same time, and solves the problem of potential fire safety hazard after the conventional defrosting electric heater breaks down.
In order to solve the technical problems, the invention is realized by the following technical scheme:
the invention relates to a method for preventing a refrigerator from being ignited, which comprises a control system and a control method, wherein the control system comprises: the defrosting heater is arranged at the bottom of the evaporator and can rapidly generate heat to melt frost accumulated on the surface of the evaporator in a starting state; the temperature sensing module is used for detecting the surface temperature of the defrosting heater and the environmental temperature of the top position of the evaporator; the control module is used for detecting the state of the defrosting heater and controlling the on and off of the defrosting heater, and can receive the temperature data transmitted by the temperature sensing module and analyze the data; the WIFI module is installed in a hinge cover at the top of the refrigerator and can be connected with a network to realize the connection of the mobile phone and the refrigerator;
the control method comprises the following steps:
detecting the defrosting requirement of the refrigerator through a control module;
determining whether to start a defrosting heater according to the defrosting requirement of the refrigerator;
after the defrosting heater is started, monitoring the real-time temperature of each sensor through a temperature sensing module;
the defrosting heater is turned off through the real-time temperature of the temperature sensing module, whether the defrosting heater is turned off forcibly is judged, and the times of turning off the defrosting heater forcibly are recorded;
whether the defrosting system is normal or not is judged according to the times of forcibly turning off the defrosting heater, whether the abnormal early warning information of the defrosting system is sent to users and manufacturers or not is determined through the WIFI module, and the users and the manufacturers are prompted to overhaul.
As a preferred technical scheme of the invention, when the control module detects that the refrigerator has a defrosting demand, the defrosting heater is turned on, and if the refrigerator has no defrosting demand, the defrosting heater is not turned on, and the control module continues to detect the defrosting demand.
As a preferred aspect of the present invention, the temperature sensing module includes: the K-type thermocouple is fixed on the surface of the defrosting heater, can detect high temperature and is used for detecting the surface temperature of the defrosting heater; and the defrosting sensor is arranged at the top of the evaporator and is used for detecting the ambient temperature at the position.
As a preferred technical scheme of the invention, after the defrosting heater is started, if the sensing temperature of a K-type thermocouple in the temperature sensing module is less than 394 ℃ and the temperature of the defrosting sensor is greater than the exit temperature, the defrosting process is normally completed, the control module normally closes the defrosting heater, and the control module continuously detects the defrosting requirement of the refrigerator.
As a preferable technical scheme of the invention, after the defrosting heater is started, if the sensing temperature of the K-type thermocouple is not less than 394 ℃ and the temperature of the defrosting sensor is less than the exit temperature, the control module forcibly turns off the defrosting heater to prevent the surface temperature of the defrosting heater from exceeding 394 ℃.
In a preferred embodiment of the present invention, the defrosting heater is forcibly turned off for a number of times n.
As a preferable technical scheme of the invention, when n is less than 2, the accidental situation is judged, the non-defrosting system is abnormal, and the control module continues to detect the defrosting requirement of the refrigerator.
As a preferred technical scheme of the invention, when n is more than or equal to 2, the non-accidental condition is judged, the defrosting system is abnormal, and the WIFI module sends risk early warning information to users and manufacturers.
The invention has the following beneficial effects:
the invention provides a method for preventing a refrigerator from being ignited, which acts on the normal operation process of the refrigerator, can monitor the surface temperature of a defrosting heater in real time under the working state of the defrosting heater, can cut off the defrosting heater in time under an abnormal state, prevents the surface temperature from exceeding a dangerous temperature limit value, and can effectively prevent the occurrence of accidents such as the ignition of the refrigerator and the like caused by the continuous working of the defrosting heater due to some abnormal factors. The invention can judge the state of the defrosting system, and can send abnormal information to users and manufacturers in time after judging the abnormality of the defrosting system, thereby facilitating the maintenance work of after-sales personnel on the defrosting system.
Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and 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 flow chart of a control method of the present 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. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Please refer to fig. 1: the method for preventing the refrigerator from being on fire is characterized by comprising a control system consisting of a control module, a defrosting heater, a temperature sensing module and a WIFI module.
The control module can monitor the state of the defrosting heater and control the on and off of the defrosting heater; the temperature data transmitted by the temperature sensing module can be received and the data can be analyzed;
the defrosting heater is arranged at the bottom of the evaporator and can rapidly generate heat to melt frost accumulated on the surface of the evaporator in a starting state;
the temperature sensing module comprises a K-type thermocouple and a defrosting sensor, the K-type thermocouple is fixed on the surface of the defrosting heater, and the K-type thermocouple can detect high temperature and is used for detecting the surface temperature of the defrosting heater; the defrosting sensor is arranged at the top of the evaporator and is used for detecting the ambient temperature at the position;
the WIFI module is installed in a hinge cover at the top of the refrigerator and can be connected with a network, so that the mobile phone and the refrigerator are connected and communicated.
The control module detects a defrosting request of the refrigerator:
when the refrigerator has a defrosting request, the control module starts a defrosting heater, and the temperature sensing module monitors the real-time temperature of each temperature sensor:
if the temperature of the K-type thermocouple is less than 394 ℃ and the temperature of the defrosting sensor is higher than the exit temperature, the defrosting process is normally finished, and the control module normally turns off the defrosting heater;
if the temperature of the K-type thermocouple is more than or equal to 394 ℃ and the temperature of the defrosting sensor is less than the exit temperature, the defrosting process is not normally finished, the surface temperature of the heater is about to exceed a safety limit value, the control module forcibly turns off the defrosting heater, and the number n of times of forcibly turning off the defrosting heater is recorded;
if n is less than 2, judging that the condition is accidental, and judging that a non-defrosting system is abnormal;
if n is larger than or equal to 2, the condition that the defrosting is not sporadic is judged, the defrosting is abnormal, and the WIFI module sends the abnormal early warning information of the defrosting system to the user and the manufacturer to prompt the user to visit the door for maintenance as soon as possible.
The specific control method comprises the following steps:
1. the refrigerator is powered on, the control system operates, and the control module detects a defrosting request of the refrigerator:
2. if the refrigerator has no defrosting request, continuing monitoring;
3. if the refrigerator has a defrosting request, the control module starts a defrosting heater, and the temperature sensing module monitors the real-time temperature of each temperature sensor;
if the temperature of the K-type thermocouple is less than 394 ℃ and the temperature of the defrosting sensor is higher than the exit temperature, the defrosting process is normally finished, and the control module normally turns off the defrosting heater;
if the temperature of the K-type thermocouple is more than or equal to 394 ℃ and the temperature of the defrosting sensor is less than the exit temperature, the defrosting process is not normally finished, the surface temperature of the heater is about to exceed a safety limit value, the control module forcibly turns off the defrosting heater, and the number n of times of forcibly turning off the defrosting heater is recorded;
if n is less than 2, judging that the condition is accidental, and judging that a non-defrosting system is abnormal;
if n is larger than or equal to 2, the condition is judged to be not accidental, the defrosting system is abnormal, and the WIFI module immediately sends the abnormal early warning information of the defrosting system to the user and the manufacturer to prompt the user to visit the door for maintenance as soon as possible.
In this embodiment: monitoring the real-time temperature of the surface of the defrosting heater through a K-type thermocouple in the temperature sensing module, and if the temperature is lower than 394 ℃, keeping the temperature of the heater within a safety limit temperature value; if the temperature is higher than 394 ℃, the temperature of the heater enters a dangerous temperature value range. When the temperature of the defrosting sensor is lower than 394 ℃, the temperature reaches the exit temperature, and the defrosting system is normal; if the defrosting sensor does not reach the exit temperature when the temperature of the K-type thermocouple is lower than 394 ℃, the control module forcibly disconnects the defrosting heater to prevent the surface temperature of the defrosting heater from exceeding 394 ℃. If the defrosting heater is forcibly turned off for 1 time, and the subsequent defrosting process normally exits defrosting, the defrosting system is judged to be normal (the temperature rise of the defrosting system is slowed probably due to accumulated frost falling on the surfaces of the temperature fuse and the defrosting sensor under accidental conditions); and if the defrosting heater is forcibly disconnected for more than 1 time, judging that the defrosting system is abnormal.
The invention can monitor the surface temperature of the defrosting heater in real time in the working state of the defrosting heater when acting on the normal running process of the refrigerator, and can cut off the defrosting heater in time in an abnormal state to prevent the surface temperature of the defrosting heater from exceeding a dangerous temperature limit value, thereby effectively preventing the occurrence of accidents such as fire of the refrigerator and the like caused by the continuous working of the defrosting heater due to some abnormal factors. The invention can judge the state of the defrosting system, and can send abnormal information to users and manufacturers in time after judging the abnormality of the defrosting system, thereby facilitating the maintenance work of after-sales personnel on the defrosting system.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean 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 invention. 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.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (8)
1. A method of preventing a fire in a refrigerator, comprising: the control system comprises a control system and a control method, wherein the control system comprises:
the defrosting heater is arranged at the bottom of the evaporator and can rapidly generate heat to melt frost accumulated on the surface of the evaporator in a starting state;
the temperature sensing module is used for detecting the surface temperature of the defrosting heater and the environmental temperature of the top position of the evaporator;
the control module is used for detecting the state of the defrosting heater and controlling the on and off of the defrosting heater, and can receive the temperature data transmitted by the temperature sensing module and analyze the data;
the WIFI module is installed in a hinge cover at the top of the refrigerator and can be connected with a network to realize the connection of the mobile phone and the refrigerator;
the control method comprises the following steps:
detecting the defrosting requirement of the refrigerator through a control module;
determining whether to start a defrosting heater according to the defrosting requirement of the refrigerator;
after the defrosting heater is started, monitoring the real-time temperature of each sensor through a temperature sensing module;
the defrosting heater is turned off through the real-time temperature of the temperature sensing module, whether the defrosting heater is turned off forcibly is judged, and the times of turning off the defrosting heater forcibly are recorded;
whether the defrosting system is normal or not is judged according to the times of forcibly turning off the defrosting heater, whether the abnormal early warning information of the defrosting system is sent to users and manufacturers or not is determined through the WIFI module, and the users and the manufacturers are prompted to overhaul.
2. The method as claimed in claim 1, wherein the defrosting heater is turned on when the control module detects that there is a defrosting demand for the refrigerator, and the defrosting heater is not turned on if there is no defrosting demand for the refrigerator, and the control module continues to detect the defrosting demand.
3. The method for preventing fire of a refrigerator according to claim 1, wherein the temperature sensing module comprises:
the K-type thermocouple is fixed on the surface of the defrosting heater, can detect high temperature and is used for detecting the surface temperature of the defrosting heater;
and the defrosting sensor is arranged at the top of the evaporator and is used for detecting the ambient temperature at the position.
4. The method for preventing the fire of the refrigerator as claimed in claim 3, wherein after the defrosting heater is turned on, if the sensing temperature of the K-type thermocouple in the temperature sensing module is less than 394 ℃ and the temperature of the defrosting sensor is greater than the exit temperature, the defrosting process is normally completed, the control module normally turns off the defrosting heater, and the control module continues to detect the defrosting requirement of the refrigerator.
5. The method as claimed in claim 3, wherein when the defrosting heater is turned on, if the sensing temperature of the type K thermocouple is not less than 394 ℃ and the temperature of the defrosting sensor is less than the exit temperature, the control module forcibly turns off the defrosting heater to prevent the surface temperature of the defrosting heater from exceeding 394 ℃.
6. The method for preventing fire of a refrigerator according to claim 5, wherein the defrosting heater is forcibly turned off for a number of times n.
7. The method for preventing the fire of the refrigerator as claimed in claim 6, wherein when n <2, it is determined that the condition is sporadic, the non-defrosting system is abnormal, and the control module continues to detect the defrosting requirement of the refrigerator.
8. The method for preventing the fire of the refrigerator as claimed in claim 6, wherein when n is greater than or equal to 2, the non-accidental condition is determined, the defrosting system is abnormal, and the WIFI module sends risk early warning information to the user and the manufacturer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210083126.4A CN114413564A (en) | 2022-01-25 | 2022-01-25 | Method for preventing fire of refrigerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210083126.4A CN114413564A (en) | 2022-01-25 | 2022-01-25 | Method for preventing fire of refrigerator |
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| Publication Number | Publication Date |
|---|---|
| CN114413564A true CN114413564A (en) | 2022-04-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210083126.4A Pending CN114413564A (en) | 2022-01-25 | 2022-01-25 | Method for preventing fire of refrigerator |
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| Country | Link |
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| CN (1) | CN114413564A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4309999A (en) * | 1979-03-28 | 1982-01-12 | Holger Lueder | Equipment for the homogeneous radiant conditioning of a room enclosure for therapeutic purposes |
| US20060086000A1 (en) * | 2004-10-26 | 2006-04-27 | Samsung Electronics Co., Ltd. | Dryer and method for controlling the same |
| CN202305712U (en) * | 2011-11-09 | 2012-07-04 | 高见泽电脑科技股份有限公司 | Temperature testing device |
| CN102927786A (en) * | 2012-11-30 | 2013-02-13 | 合肥美的荣事达电冰箱有限公司 | Defrosting control method and system of refrigerator and refrigerator |
| CN112595006A (en) * | 2020-12-16 | 2021-04-02 | 珠海格力电器股份有限公司 | Refrigerating and defrosting method and device for refrigerator, refrigerator and processor |
-
2022
- 2022-01-25 CN CN202210083126.4A patent/CN114413564A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4309999A (en) * | 1979-03-28 | 1982-01-12 | Holger Lueder | Equipment for the homogeneous radiant conditioning of a room enclosure for therapeutic purposes |
| US20060086000A1 (en) * | 2004-10-26 | 2006-04-27 | Samsung Electronics Co., Ltd. | Dryer and method for controlling the same |
| CN1766218A (en) * | 2004-10-26 | 2006-05-03 | 三星电子株式会社 | Drying machine and control method thereof |
| CN202305712U (en) * | 2011-11-09 | 2012-07-04 | 高见泽电脑科技股份有限公司 | Temperature testing device |
| CN102927786A (en) * | 2012-11-30 | 2013-02-13 | 合肥美的荣事达电冰箱有限公司 | Defrosting control method and system of refrigerator and refrigerator |
| CN112595006A (en) * | 2020-12-16 | 2021-04-02 | 珠海格力电器股份有限公司 | Refrigerating and defrosting method and device for refrigerator, refrigerator and processor |
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