Instant freezing chamber structure, refrigerator and windless instant freezing control method

Abstract

The invention provides an instant freezing chamber structure, a refrigerator and a windless instant freezing control method.The instant freezing chamber structure comprises an instant freezing chamber arranged in a freezing space of the refrigerator, cold conduction walls are arranged on the two sides of the instant freezing chamber and spaced from the side walls of the freezing space, and heat preservation layers are arranged on the top face and the bottom face of the instant freezing chamber; a heater is arranged on the inner side of the heat preservation layer. According to the instant freezing chamber and the freezing space of the refrigerator, cold energy transfer is conducted in a cold conduction mode, temperature fluctuation is prevented from being influenced by disturbance of cold air in the freezing chamber, and the temperature in the instant freezing chamber is kept and controlled more accurately and reliably through the heater.

Description

Technical Field

[0001] The invention relates to the technical field of refrigerators, and in particular to a quick freezing compartment structure, a refrigerator and a control method for windless quick freezing. Background Art

[0002] With the rapid development of refrigerators and the improvement of consumers' requirements for food preservation, the multi-functions of refrigerators have been rapidly developed, and the control requirements for food storage in refrigerators have become increasingly stringent. Among them, the existing technology includes instant freezing storage.

[0003] Through program control, the fresh-keeping function is realized through supercooling environment preparation, supercooling introduction, supercooling maintenance, supercooling release, and -5℃ maintenance operation. In each stage, the temperature of the compartment is controlled by the sensor to control the opening and closing of the electric damper;

[0004] However, this method has the disadvantages of uneven temperature distribution in the compartments and fluctuations in the air volume of the damper, resulting in a low success rate of instant freezing and an unobvious preservation effect. Summary of the invention

[0005] In order to solve the technical problems of low success rate of instant freezing and unclear fresh-keeping effect of refrigerators in the prior art, the present invention provides an instant freezing compartment structure, a refrigerator and a windless instant freezing control method.

[0006] The technical solution adopted by the present invention is:

[0007] The present invention proposes a quick freezing chamber structure of a refrigerator, comprising: a quick freezing chamber arranged in a freezing space of the refrigerator, cold conduction walls are arranged on both sides of the quick freezing chamber and are spaced from the side walls of the freezing space, a heat preservation layer is arranged on the top and bottom surfaces of the quick freezing chamber, and a heater is arranged inside the heat preservation layer.

[0008] Furthermore, a drawer is provided in the instant freezing room, and the side walls of the drawer serve as the cold conduction surfaces.

[0009] Preferably, the heater is an aluminum foil heater.

[0010] Furthermore, the instant freezing compartment is located in the middle of the freezing space.

[0011] Furthermore, it also includes: a damper arranged on the back side of the instant freezing chamber and / or a vibration device arranged on the bottom of the instant freezing chamber.

[0012] The present invention also provides a refrigerator, comprising the instant freezing chamber structure.

[0013] The present invention also provides a windless instant freezing control method, using the above refrigerator, comprising the steps of:

[0014] The refrigerator runs the flash freeze program;

[0015] Execute the supercooling environment preparation stage, and start the heater to make the instant freezing chamber reach the supercooling preparation state;

[0016] Execute the supercooling introduction stage, and start the heater to make the instant freezing chamber gradually approach and reach the supercooling maintenance temperature;

[0017] During the supercooling maintenance phase, the heater is turned on to maintain the instant freezing chamber at the supercooling maintenance temperature.

[0018] Furthermore, the step of executing the supercooling environment preparation stage specifically includes the following steps:

[0019] When the temperature of the instant freezing compartment reaches the first control temperature through cold conduction, the heater is turned on and operated at a first power-on rate to maintain the temperature of the instant freezing compartment near the first control temperature, and the heater is operated at the first power-on rate for a first heating time;

[0020] The set temperature of the instant freezing compartment is modified to a second control temperature, the heater is controlled to operate at a second power-on rate to maintain the temperature of the instant freezing compartment near the second control temperature, and the heater is operated for a second heating time.

[0021] Furthermore, the step of executing the supercooling introduction stage includes the following steps:

[0022] The temperature setting of the instant freezing compartment is modified to the third control temperature, and the temperature value is reduced every third heating time, and the power supply rate of the heater is synchronously controlled to maintain the temperature of the instant freezing compartment near the set temperature until the supercooling maintenance temperature is reached.

[0023] Furthermore, the power-on rate of the heater is revised by a revision value d, and the value of the revision value d is determined according to the operating time of the compressor, the number of times the refrigerator door is opened, and the change in outdoor ambient temperature.

[0024] Compared with the prior art, the instant freezing chamber of the present invention and the freezing space of the refrigerator transfer cold energy by cold conduction. Generally, the temperature of the freezing space is -18°. The temperature of the freezing space can be transferred to the instant freezing chamber through the cold conduction wall to cool the instant freezing chamber. Since the instant freezing chamber is not directly connected to the freezing space, there is no need to open or close the damper to prevent the disturbance of cold air in the freezing room from affecting the temperature fluctuation. Therefore, the temperature maintenance and control of the instant freezing chamber by the heater are more accurate and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0026] Figure 1 This is a schematic diagram of the structure of the instant freezing compartment area of ​​the freezing space in an embodiment of the present invention;

[0027] Figure 2 is a schematic structural diagram of a refrigerator in an embodiment of the present invention;

[0028] Figure 3 is a flow chart in an embodiment of the present invention;

[0029] Figure 4 A functional diagram of instant freezing to releasing in an embodiment of the present invention;

[0030] Figure 5 A flowchart in a specific embodiment of the present invention;

[0031] Figure 6 Schematic diagram of temperature curves and heater power-on states corresponding to various stages in an embodiment of the present invention.

[0032] 1. Refrigerator;

[0033] 2. Freezer space;

[0034] 3. Instant freezing room;

[0035] 31. Heater; 32. Temperature sensor. DETAILED DESCRIPTION

[0036] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0037] The principle and structure of the present invention are described in detail below with reference to the accompanying drawings and embodiments.

[0038] With the rapid development of refrigerators and the increasing requirements of consumers for food preservation, the multifunctionality of refrigerators has developed rapidly. At the same time, the control requirements for food storage in refrigerators have become increasingly stringent. Instantaneous freezing refers to instant freezing and making the water evenly form round ice crystals. The quickly formed round ice crystals capture and lock food cells. The round ice crystals are evenly distributed in the food cells, and no hard ice crystal bands are produced. The food cell tissue is not pierced. It is a refrigeration technology method that preserves food from deterioration and does not lose nutrients.

[0039] The flash freezing technology is specifically to realize the preservation function through program control after supercooling environment preparation, supercooling introduction, supercooling maintenance, supercooling release, and -5℃ maintenance operation. In each stage, the temperature of the compartment is controlled by the sensor to open and close the electric damper. However, this method has the disadvantages of uneven temperature distribution in the compartment and fluctuation of the damper air volume, resulting in a low success rate of flash freezing and an unobvious preservation effect.

[0040] In this regard, Figure 1 As shown, the present invention proposes a quick freezing chamber structure of a refrigerator, specifically comprising a quick freezing chamber 3, which is arranged in a freezer box of a refrigerator 1 (the freezer box has a freezing space 2), that is, the quick freezing chamber 3 inside is arranged in the freezing space 2, cold conduction walls are arranged on both sides of the quick freezing chamber, and there is a gap between the inner walls on both sides of the freezing space 2 and the cold conduction walls on both sides of the quick freezing chamber, so that the cold energy of the freezing space 2 can reach both sides of the quick freezing chamber 3 through the gap, and then be transferred to the quick freezing chamber 3, and a heat preservation layer is arranged on the top and bottom surfaces of the quick freezing chamber 3 to prevent the cold energy from being conducted from the top and bottom surfaces of the quick freezing chamber, and a heater 31 is arranged on the side of the heat preservation layer facing the quick freezing chamber.

[0041] That is, the instant freezing chamber of the present invention and the freezing space of the refrigerator transfer cold energy by cold conduction. Generally, the temperature of the freezing space is -18°. The temperature of the freezing space can be transferred to the instant freezing chamber through the cold conduction wall to cool the instant freezing chamber. Since the instant freezing chamber is not directly connected to the freezing space, it is not necessary to open or close the damper to prevent the disturbance of cold air in the freezing room from affecting the temperature fluctuation. Therefore, the temperature maintenance and control of the instant freezing chamber by the heater are more accurate and reliable.

[0042] In a specific embodiment, a drawer is arranged in the flash freezing room, and the two side walls of the drawer are cold conduction walls.

[0043] By arranging the drawer, the instant freezing compartment is in a completely closed state after the drawer is pushed in, and is not directly connected with the freezing space, so as to avoid cold disturbance and facilitate the storage of food in the instant freezing compartment.

[0044] In a specific embodiment, the heater is an aluminum foil heater.

[0045] Aluminum foil heater is used in the room because it heats evenly and has a large heating area. It also comes with a self-adhesive bottom layer, which is convenient for installation in the instant freezing room and takes up less space in the instant freezing room.

[0046] like Figure 2 As shown, in a specific embodiment, the instant freezing chamber is located in the middle of the freezing space in the vertical direction. Since cold energy is easy to accumulate, the temperature may deviate if it is set at the bottom or the top. The cold energy set in the middle is moderate and easy to control.

[0047] In a specific embodiment, a damper on the back side of the instant freezing chamber and / or a vibration device at the bottom of the instant freezing chamber may be provided. The damper on the back side and the vibration device at the bottom do not affect the cold conduction of the instant freezing chamber. When the instant freezing chamber needs to be overcooled, the damper on the back side is directly opened, or the vibration device is opened in conjunction with the damper, which can increase the air flow between the freezing space and the instant freezing chamber and improve the overcooling release speed.

[0048] In addition, a temperature sensor is provided in the instant freezing room. The temperature sensor 32 can be specifically arranged on the back side of the instant freezing room.

[0049] like Figure 2 As shown, the present invention also provides a refrigerator using the above-mentioned instant freezing compartment structure.

[0050] The refrigerator using the instant freezing chamber has an instant freezing chamber directly arranged in the freezer box or freezer compartment of the refrigerator, the instant freezing chamber is provided in the instant freezing chamber, and the freezer compartment or freezing space is not directly connected to the instant freezing chamber, thereby avoiding air turbulence in the instant freezing chamber, thereby improving the instant freezing success rate of the instant freezing chamber.

[0051] like Figure 3 As shown, the present invention also proposes a windless instant freezing method, using the above refrigerator, specifically comprising the steps of:

[0052] The refrigerator runs the flash freeze program;

[0053] Execute the supercooling environment preparation stage, and start the heater to make the instant freezing chamber reach the supercooling preparation state;

[0054] Execute the supercooling introduction stage, and start the heater to make the instant freezing chamber gradually approach and reach the supercooling maintenance temperature;

[0055] During the supercooling maintenance phase, the heater is turned on to maintain the instant freezing chamber at the supercooling maintenance temperature.

[0056] When the freezer space of the refrigerator operates normally within its normal temperature range, the instant freezing compartment can be overcooled to gradually reduce the temperature to the corresponding overcooling temperature to meet the instant freezing requirements. Since there is no cold wind disturbance, the instant freezing compartment can be controlled more accurately through the heater, improving the success rate of instant freezing.

[0057] like Figure 5 As shown, in a specific embodiment, executing the supercooling environment preparation stage specifically includes the following steps:

[0058] When the temperature of the instant freezing compartment reaches the first control temperature through cold conduction, the set temperature of the instant freezing compartment is modified to the first control temperature, the heater is turned on and operated at a first power-on rate, so that the temperature of the instant freezing compartment is maintained near the first control temperature, and the heater is operated at the first power-on rate for a first heating time;

[0059] The set temperature of the instant freezing compartment is modified to the second control temperature, the power-on rate of the heater is controlled (operated according to the second power-on rate) to maintain the temperature of the instant freezing compartment near the second control temperature, and the second heating time is operated.

[0060] The first control temperature is greater than 0°, and the specific value is 2°. The second control temperature is less than 0°, and the specific value can be -1.5°. The first and second heating times can be set to 60 minutes. By performing a supercooling environment preparation stage near 0°, the success rate of subsequent instant freezing can be improved.

[0061] The steps of executing the supercooling introduction phase include:

[0062] The set temperature of the instant freezing chamber is modified to the third control temperature, and the temperature value is reduced every third heating time, and the power supply rate of the heater is synchronously controlled to maintain the temperature of the instant freezing chamber near the set temperature until the supercooling maintenance temperature is reached.

[0063] The specific third control temperature is -2°C, the supercooling maintenance temperature is -5.5°C, and the third control temperature to the supercooling maintenance temperature can be specifically divided into 8 control stages, that is, it is reduced by 0.5° each time, and the third heating time set for each control stage can be specifically 30 minutes.

[0064] By adjusting the power-on rate of the heater, the heater's temperature can be changed and the heat supply of the heater can be gradually reduced, so that the temperature of the instant freezing chamber can be gradually reduced. At the same time, since cold conduction is used to transfer cold, the temperature fluctuation is small and the temperature can be accurately controlled through the heater.

[0065] In the supercooling maintenance stage, the energization rate of the heater is directly set to the third energization rate, so that the temperature of the instant freezing chamber is maintained at the supercooling maintenance temperature.

[0066] like Figure 6 As shown, the first power-on rate A is greater than the second power-on rate B, and the second power-on rate B is greater than the third power-on rate C, that is, the power-on rate is gradually reduced before the supercooling maintenance stage.

[0067] like Figure 4 As shown, after supercooling maintenance, it also includes a supercooling release stage and a re-maintenance stage. If supercooling release is required, the heater is directly turned off, the set temperature of the instant freezing chamber is modified to the set temperature of the freezing space, and the speed of the compressor is increased to increase the refrigeration capacity so that the instant freezing chamber can quickly reach the set temperature.

[0068] Subsequently, the set temperature of the instant freezing chamber is modified to a maintenance temperature close to the supercooling temperature, and the heater is turned on to make the temperature of the instant freezing chamber reach the maintenance temperature, and the operation is maintained at the maintenance temperature. The non-freezing preservation effect of the supercooling state can only be maintained for a short time. The supercooling state can be released by controlling the temperature at -18℃. However, if it is stored at -18℃ for a long time, the food will freeze into ice. For example, meat materials need to be taken out and thawed before they can be cut. Therefore, after -18℃, the temperature is maintained at -5℃. Meat food can be taken out and cut directly, achieving the "one-size-fits-all" effect after freezing. The storage time at -5℃ is generally about 10 days.

[0069] In a specific embodiment, the power-on rate of the heater is revised by a revision value d, and the value of the revision value d is determined according to the running time of the compressor, the number of times the refrigerator door is opened, and the change in the outdoor ambient temperature.

[0070] Specifically, for example, if the compressor operating time (operating time before starting the instant freezing program) is greater than the preset time, the revised value e corresponding to the compressor factor is set to -1%; if it is less than or equal to the preset time, it is set to 0; if the number of refrigerator door openings is greater than the preset number of times when executing the instant freezing program, the revised value f corresponding to the number of refrigerator door openings is set to -2%; when the difference between the lowest temperature and the highest temperature of the outdoor ambient temperature during the instant freezing program time is greater than the preset temperature, the revised value g corresponding to the change in the outdoor ambient temperature is set to -1%; d=e(compressor factor)+f(door opening factor)+g(ambient temperature factor), the specific heater's power-on rate is revised by the revised value d to the original power-on rate a plus the revised value d, and the revised power-on rate of the heater can be obtained.

[0071] By setting the revised value to revise the power-on rate, the influence of various factors on the temperature of the freezing space can be offset, making the instantaneous freezing room temperature control more accurate and stable.

[0072] It should be noted that the terms used above are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0073] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0074] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0075] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0076] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0077] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A quick freezing compartment structure of a refrigerator, characterized in that: include: A flash freezing chamber is arranged in the freezer space of the refrigerator, cold conduction walls are arranged on both sides of the flash freezing chamber and are separated from the side walls of the freezer space to form a gap through which cold water can pass, and a heat preservation layer is arranged on the top and bottom surfaces of the flash freezing chamber, and a heater is arranged inside the heat preservation layer.

2. The instant freezing compartment structure of the refrigerator according to claim 1, characterized in that: A drawer is arranged in the instant freezing room, and the side walls of the drawer serve as the cold conduction surfaces.

3. The instant freezing compartment structure of the refrigerator according to claim 1, characterized in that: The heater is an aluminum foil heater.

4. The instant freezing compartment structure of the refrigerator according to claim 1, characterized in that: The instant freezing compartment is located in the middle of the freezing space.

5. The instant freezing compartment structure of a refrigerator according to claim 1, characterized in that: Also includes: A damper arranged on the back side of the instant freezing chamber and / or a vibration device arranged on the bottom of the instant freezing chamber.

6. A refrigerator, characterized in that: The invention comprises the instant freezing chamber structure as claimed in any one of claims 1 to 5.

7. A windless instant freezing control method, characterized in that: Using the refrigerator according to claim 6 comprises the steps of: The refrigerator runs the flash freeze program; Execute the supercooling environment preparation stage to make the flash freezing chamber reach the supercooling preparation state; Execute the supercooling introduction stage to make the flash freezing compartment gradually approach and reach the supercooling maintenance temperature; The supercooling maintenance stage is performed to maintain the flash freezing compartment at the supercooling maintenance temperature.

8. The windless instantaneous freezing control method according to claim 7, characterized in that: The step of preparing the supercooling environment specifically includes the following steps: When the temperature of the instant freezing compartment reaches the first control temperature through cold conduction, the heater is turned on and operated at a first power-on rate to maintain the temperature of the instant freezing compartment near the first control temperature, and the heater is operated at the first power-on rate for a first heating time; The set temperature of the instant freezing compartment is modified to a second control temperature, the heater is controlled to operate at a second power-on rate to maintain the temperature of the instant freezing compartment near the second control temperature, and the heater is operated for a second heating time.

9. The windless instant freezing control method according to claim 7, characterized in that: The step of executing the supercooling introduction phase includes the following steps: The temperature setting of the instant freezing compartment is modified to the third control temperature, and the temperature value is reduced every third heating time, and the power supply rate of the heater is synchronously controlled to maintain the temperature of the instant freezing compartment near the set temperature until the supercooling maintenance temperature is reached.

10. The windless instantaneous freezing control method according to claim 8 or 9, characterized in that: The power-on rate of the heater is revised by a revision value d, and the value of the revision value d is determined according to the running time of the compressor, the number of times the refrigerator door is opened, and the change in the outdoor ambient temperature.

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