Food non-freezing fresh-keeping control method, refrigeration equipment and storage medium

A control method and technology for refrigeration equipment, which are applied to household refrigeration devices, lighting and heating equipment, cooling fluid circulation devices, etc., can solve the problems of lowering of fresh-keeping quality, freezing, and food freezing, and achieve the effect of improving fresh-keeping effect and quality.

Inactive Publication Date: 2020-07-10
GREE ELECTRIC APPLIANCES INC OF ZHUHAI
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AI-Extracted Technical Summary

Problems solved by technology

[0005] But then comes the problem of food freezing. Under a single temperature condition, such as soft freezing at -3°C, the meat will continue to freeze and become harder and harder.
The control program of high and low temperature alternates, if the low temperature stage is too long, there will be a risk of freezing, especially in the existing technology, which is often based on the design concept that rapid cooling and freezing can maintain the quality of food to the greatest e...
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Abstract

The invention provides a food non-freezing fresh-keeping control method, refrigeration equipment and a storage medium. The control method comprises the following steps that an instruction acquisitionstep is used for acquiring a fresh-keeping storage instruction; a heating step is used for controlling a compressor to operate at a heating preset temperature Tons so as to heat stored food to the freezing point temperature of the stored food or above; a supercooling introduction step is used for controlling the compressor to operate at an introduction preset temperature Tond so as to reduce the temperature of the stored food to the freezing point temperature of the stored food or below; and a supercooling maintaining step is used for controlling the compressor to operate at a maintaining preset temperature Tonw for a preset time tw so as to maintain the temperature of the stored food at the freezing point temperature of the stored food or below. According to the food non-freezing fresh-keeping control method, when the newly input food is stored, the heating step is firstly carried out, so that the previously stored food in an over-frozen state is effectively prevented from being frozen due to cooling, and the fresh-keeping effect and quality of the food are further improved.

Application Domain

Lighting and heating apparatusCooling fluid circulation

Technology Topic

ChemistryProcess engineering +5

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  • Food non-freezing fresh-keeping control method, refrigeration equipment and storage medium

Examples

  • Experimental program(1)

Example Embodiment

[0029] In order to make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described clearly and completely with reference to specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.
[0030] It should be noted that the terms "first" and "second" in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and not necessarily used to describe a specific sequence or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations of them are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to the clearly listed Those steps or units may include other steps or units that are not clearly listed or are inherent to these processes, methods, products, or equipment.
[0031] See figure 1 As shown, according to an embodiment of the present invention, there is provided a method for controlling food freshness without freezing, including:
[0032] The instruction obtaining step is used to obtain the fresh-keeping storage instruction, and enter the heating step after obtaining the fresh-keeping storage instruction;
[0033] The heating step is used to control the compressor to run at the heating preset temperature Tons, so as to raise the temperature of the stored food above the freezing point temperature of the stored food. After the heating step continues to rise for the preset time ts, enter the supercooling introduction step ;
[0034] The supercooling introduction step is used to control the compressor to run at a preset temperature Tond, so as to reduce the temperature of the stored food to below the freezing point temperature of the stored food, and continue the introduction for a preset time during the supercooling introduction step After td, enter the subcooling maintenance step;
[0035] The subcooling maintenance step is used to control the compressor to maintain the preset temperature Tonw and run for a preset time tw to maintain the temperature of the stored food below the freezing point temperature of the stored food, and continue to maintain during the subcooling maintenance step After the preset time tw, enter the heating step; wherein, Tons>Tond=Tonw. In this technical solution, when the user selects fresh-keeping storage, a fresh-keeping storage instruction will be issued, which means that the user has put or will put the food to be kept fresh in the fresh-keeping space (for example, the fresh-keeping room on the refrigerator). Different from the prior art, it is no longer required to perform rapid cooling control on the fresh-keeping space but adopts a temperature-rising step. Such control can effectively prevent the previously stored food in an over-frozen state from freezing due to cooling, and it can also ensure the fresh-keeping space The food is in a non-frozen state, thereby improving the preservation effect and quality of the food.
[0036] Further, the supercooling introduction step is a stepwise gradient cooling control method. Specifically, the introduction of the preset temperature Tond includes the first introduction of the preset temperature Tond1, the second introduction of the preset temperature Tond2, ..., the nth introduction of the preset temperature The temperature Tondn is used to control the compressor to introduce the preset temperature Tond1, the second preset temperature Tond2, ..., the nth preset temperature Tondn, so as to reduce the temperature of the stored food in stages The freezing point temperature of the stored food is below the freezing point temperature, where Tons>Tond1>Tond2>...>Tondn=Tonw, n≥2, where the specific value of n depends on the type of food in the fresh-keeping space, for example, for general meat In other words, the freezing point temperature is generally around -1.7°C to -2°C. At this time, a value of 4 is more appropriate. For foods with a lower freezing point temperature, the corresponding value of n can be larger, that is, n The value of can be negatively related to the freezing point temperature of the food. The lower the freezing point temperature, the greater the value of n. As the supercooling introduction step progresses, the introduction preset temperature corresponding to each stage gradually decreases and actively approaches the freezing point temperature of the food until it drops below the freezing point temperature of the stored food.
[0037] In order to effectively prevent the single duration of the super-cooling maintenance step from being too long and leading to freezing of the food and leading to a decrease in the preservation quality, preferably, tw≤td/n, that is, to limit the super-cooling maintenance step to continue to maintain the preset time tw It takes more time for the average stage of introduction of the pre-set time td than the supercooling introduction step, and the best one is 1h Tond1>Tond2>…>Tondn=Tonw≥-40℃.
[0038] In order to accurately control the operation or shutdown of the compressor after the corresponding preset time to ensure the preservation effect, preferably, in terms of the limit of the compressor start-up temperature, Tons=TS0+TB1/2; Tond1=TS1+TB1/2 , Tond2=TS2+TB1/2,..., Tondn=TSn+TB1/2; Tonw=Tondn, where TS0 is the preset temperature for heating, TS1 is the first preset temperature, TS2 is the second preset temperature, TSn is the first n Preset temperature, TB1 is the floating temperature of the compressor starting point, 0℃
[0039] In order to make the technical solution of the present invention clearer and clearer, see the following for details:
[0040] When the user selects the tender freeze storage function, follow the steps below:
[0041] Heating process: During the heating process, the control parameters of the tender freeze function zone (that is, the aforementioned fresh-keeping space) are adjusted as follows: Turn-on temperature point of the tender freeze function zone: Tons=TS0+TB1/2; Shut down temperature point of the tender freeze function zone :Toffs=Tons-TB2/2, 2℃≥TB1>0℃, 2℃≥TB2>0℃, according to the start-stop temperature control, this step continues ts. Among them, 5≥TS0≥0℃, 2h≥ts≥1h.
[0042] The supercooling introduction process is divided into n stages:
[0043] The first stage: According to the preset temperature TS1 control, the control parameters of the tender freeze function area are adjusted as follows: the start temperature point of the tender freeze function area: Tond1=TS1+TB1/2; the shutdown temperature point of the tender freeze function area: Toffd1=Tond1-TB2 /2, according to the start and stop temperature control to make the temperature of the tender freeze function close to TS1, the control time is td1.
[0044] Phase 2: When the maintenance time of the first phase reaches td1, the temperature will be lowered according to the preset temperature TS2. The start-up temperature point of the tender freeze function area: Tond2=TS2+TB1/2; the switch-off temperature point of the tender freeze function area: Toffd2=Tond2- TB2/2 2≥TB1, TB2>0 is controlled according to the start-stop temperature, so that the temperature of the tender freeze function area is close to TS2, and the maintenance time is td2.
[0045] Stage 3: When the maintenance time of the second stage reaches td2, the temperature will be lowered according to the preset temperature TS3. The start-up temperature point of the tender freeze function zone: Tond3=TS3+TB1/2; the switch-off temperature point of the tender freeze function zone: Toffd3=Tond3-TB2 /2 2≥TB1, TB 2>0 is controlled according to the start-stop point temperature, so that the temperature of the tender freeze function area is close to TS3, and the maintenance time is td3;
...
[0046] Until the temperature starts to drop according to the preset temperature TSn, the start-up temperature point of the tender freeze function zone: Tondn=TSn+TB1/2; the switch-off temperature point of the tender freeze function zone: Toffdn=Tondn-TB2/2. Make the temperature of the tender freeze functional area close to TSn, and the maintenance time is tdn.
[0047] Overcooling maintenance process: the tender freeze function zone is controlled according to the preset temperature Tw, the start temperature point of the tender freeze function zone: Tonw=TSn+TB1/2; the shutdown temperature point of the tender freeze function zone: Toffw=TSn-TB2/2, overcooling The maintenance time is tw. After the control time reaches tw, it returns to the heating process for cyclic control.
[0048] Further, in order to improve the preservation effect of food, preferably, the control method further includes: an energy field preservation step, which operates synchronously with the supercooling maintenance step to perform energy action on the stored food. The energy field may, for example, Including: electric field, magnetic field, etc., to act on the water molecules in the food to keep the water molecules in a resonant state, reduce the temperature of the supercooling point, and extend the period of time for the supercooling stability.
[0049] The present invention also provides a computer-readable storage medium on which a computer program is stored, and when the computer program is executed by a processor, the steps of the above-mentioned control method are realized.
[0050] The present invention also provides a refrigeration equipment, including a controller, the controller including a processor, a memory, and a computer program stored in the memory that can run on the processor. The processor implements the above method when the program is executed. step. It can be understood that, as a component of the control system of the refrigeration equipment, the controller is also connected or electrically connected to various temperature sensors, temperature adjustment devices, and corresponding timers of the refrigeration equipment. Preferably, The refrigerating equipment is provided with a corresponding display, and a button for selecting the function of tender freezing or non-freezing of food is provided on the refrigeration equipment for the user to choose.
[0051] The refrigeration equipment has a corresponding refrigeration system, which specifically includes a compressor, a condenser, an anti-condensation tube, a filter drier, a refrigeration evaporator, and an air return pipe assembly. Here, it is connected as a traditional refrigeration system component of a refrigerator or a freezer. The present invention does not Do repeat.
[0052] Preferably, the refrigeration equipment includes any one of a refrigerator and a freezer.
[0053] The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions can be stored as one or more instructions or codes on a computer-readable medium or transmitted via the computer-readable medium. Other examples and implementations are within the scope and spirit of the invention and the appended claims. For example, due to the nature of software, the functions described above can be implemented using software executed by a processor, hardware, firmware, hardwired, or a combination of any of these. In addition, each functional unit may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
[0054] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are only illustrative. For example, the division of the units may be a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components may be combined or may be Integrate into another system, or some features can be ignored or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, units or modules, and may be in electrical or other forms.
[0055] The units described as separate components may or may not be physically separate, and the components used as the control device may or may not be physical units, and may be located in one place or distributed on multiple units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.
[0056] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium. Based on this understanding, the technical solution of the present invention essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium , Including several instructions to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage media include: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, magnetic disk or optical disk and other media that can store program code .
[0057] The above descriptions are only the embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various modifications and changes. Any modification, equivalent replacement, improvement, etc., made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

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