CN103791683A - Liquid nitrogen control system of food freezer - Google Patents
Liquid nitrogen control system of food freezer Download PDFInfo
- Publication number
- CN103791683A CN103791683A CN201210433573.4A CN201210433573A CN103791683A CN 103791683 A CN103791683 A CN 103791683A CN 201210433573 A CN201210433573 A CN 201210433573A CN 103791683 A CN103791683 A CN 103791683A
- Authority
- CN
- China
- Prior art keywords
- liquid nitrogen
- mcu
- output
- control system
- valve switch
- 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
Landscapes
- Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
Abstract
Disclosed is a liquid nitrogen control system of a food freezer. A temperature sensor is arranged in a liquid nitrogen container, the output of the temperature sensor is connected with an MCU (micro control unit), an output control signal of the MCU is connected with a relay controlling an electronic valve switch, the electronic valve switch controls a motor to perform heating or cooling, and the MCU is connected with a display module and a warning module. The liquid nitrogen control system is characterized by further comprising a liquid level sensor with the output connected with the MCU. Liquid nitrogen capacity in the container can be monitored in real time while temperature control is performed, and a warning can be given out.
Description
Technical field
The present invention relates to refrigeration technology field, particularly a kind of liquid nitrogen control system of foodstuffs refrigerator.
Background technology
At present very ripe to the cold storing and fresh-keeping technology of food, wherein utilize liquid nitrogen refrigerating can reach subzero 50 degree, and liquid nitrogen is nontoxic, originates wider, mechanical refrigeration relatively, cost is lower, has obtained more application.But, in liquid nitrogen refrigerating process, owing to lowering the temperature sharply, therefore need refrigerated storage temperature strictly to control, in order to avoid excessively cooling, and due to when refrigeration liquid nitrogen amount ratio larger, so also will strictly control the consumption of liquid nitrogen, cause refrigerating capacity deficiency in order to avoid amount of liquid nitrogen is not enough.In existing technology, mostly be to pay close attention to temperature, and ignore the control of amount of liquid nitrogen, because liquid nitrogen container seals completely, in refrigerating environment, cannot obtain its surplus, can only be that this mode has very large hysteresis quality according to keeping the situation of low temperature to judge whether to also have enough liquid nitrogen, give the food refrigerated inconvenience that brought.
Summary of the invention
In order to overcome above-mentioned the deficiencies in the prior art, the object of the present invention is to provide a kind of liquid nitrogen control system of foodstuffs refrigerator.
To achieve these goals, the technical solution used in the present invention is:
A kind of liquid nitrogen control system of foodstuffs refrigerator, set temperature sensor in liquid nitrogen container, the output of temperature sensor meets MCU, MCU output control signal connects the relay of controlling electronic valve switch, electronic valve switch control motor heats up or lowers the temperature, and described MCU is connected to display module and alarm module, it is characterized in that, also comprise liquid level sensor, the output of liquid level sensor meets MCU.
Compared with prior art, the present invention can carry out the temperature controlled while, liquid nitrogen capacity in real time monitoring container, and send alarm prompt.
Accompanying drawing explanation
Accompanying drawing is structural representation of the present invention.
The specific embodiment
Below in conjunction with drawings and Examples, the present invention is carried out to more detailed explanation.
As shown in the figure, the present invention is a kind of liquid nitrogen control system of foodstuffs refrigerator, set temperature sensor in liquid nitrogen container, the output of temperature sensor meets MCU, and MCU output control signal connects the relay of controlling electronic valve switch, and electronic valve switch control motor heats up or lowers the temperature, described MCU is connected to display module and alarm module, it is characterized in that, also comprise liquid level sensor, the output of liquid level sensor meets MCU.
The present invention utilizes liquid level sensor, when liquid level is lower than setting value time, will send alarm, and prompting liquid nitrogen deficiency, reminds staff to change liquid nitrogen container, or add nitrogen.
Claims (1)
1. the liquid nitrogen control system of a foodstuffs refrigerator, set temperature sensor in liquid nitrogen container, the output of temperature sensor meets MCU, MCU output control signal connects the relay of controlling electronic valve switch, electronic valve switch control motor heats up or lowers the temperature, and described MCU is connected to display module and alarm module, it is characterized in that, also comprise liquid level sensor, the output of liquid level sensor meets MCU.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201210433573.4A CN103791683A (en) | 2012-11-02 | 2012-11-02 | Liquid nitrogen control system of food freezer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201210433573.4A CN103791683A (en) | 2012-11-02 | 2012-11-02 | Liquid nitrogen control system of food freezer |
Publications (1)
Publication Number | Publication Date |
---|---|
CN103791683A true CN103791683A (en) | 2014-05-14 |
Family
ID=50667582
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201210433573.4A Pending CN103791683A (en) | 2012-11-02 | 2012-11-02 | Liquid nitrogen control system of food freezer |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN103791683A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104197574A (en) * | 2014-08-27 | 2014-12-10 | 严佳乐 | Frozen dessert refrigerating device and method |
-
2012
- 2012-11-02 CN CN201210433573.4A patent/CN103791683A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104197574A (en) * | 2014-08-27 | 2014-12-10 | 严佳乐 | Frozen dessert refrigerating device and method |
CN104197574B (en) * | 2014-08-27 | 2016-08-31 | 严佳乐 | The refrigeration plant of frozen dessert and method |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN201917169U (en) | Refrigerator capable of monitoring freshness preservation degree of food | |
CN102435042B (en) | Control method of draught fan of refrigerator compartment | |
CN202393167U (en) | Three-door refrigerator | |
CN105492844B (en) | Power consumption output device | |
CN203024533U (en) | Networking refrigerator with function for remotely controlling thawing and identifying freshness of food | |
CN201392070Y (en) | Intelligent full-automatic cold-hot dual purpose heat insulation cabinet | |
EP2743622A3 (en) | Refrigerator | |
CN102506557B (en) | Refrigeration equipment and switching unit control method in defrosting process of refrigeration equipment | |
WO2009128647A3 (en) | Ice-full state detecting apparatus and refrigerator having the same | |
WO2015025236A1 (en) | Refrigerator and control method therefor | |
CN103017479B (en) | Water dispenser and refrigerating plant thereof | |
CN103388955B (en) | Refrigerator and control method thereof | |
CN202993746U (en) | Water dispenser and refrigeration apparatus thereof | |
CN103363759B (en) | Refrigerator defrosting method and system | |
CN103791683A (en) | Liquid nitrogen control system of food freezer | |
EP2738484A3 (en) | Refrigerator with thermoelectric device control process for an icemaker | |
CN108981267B (en) | Fresh-keeping refrigerator and control method thereof | |
CN103438631B (en) | There is the refrigeration plant of the frequency conversion type of low startup noise | |
CN209042851U (en) | A kind of freeze preservation refrigerator | |
JP5747144B2 (en) | refrigerator | |
CN104329903A (en) | Single system refrigerator | |
CN204478695U (en) | For refrigeration plant wine frame and there is its refrigerator | |
CN107894129A (en) | A kind of commercial refrigerator intelligence control system | |
CN113280564A (en) | Intelligent control ware based on commercial freezer | |
CN204006952U (en) | Single system refrigerator |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
C06 | Publication | ||
PB01 | Publication | ||
C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140514 |