Constant temperature fresh-keeping refrigerator, constant temperature control method and fresh-keeping control method

Abstract

The present invention discloses a constant temperature fresh-keeping refrigerator and a constant temperature control method and a fresh-keeping control method, and relates to the technical field of refrigerators. The present invention includes a refrigerating compartment, a freezing compartment, a slightly freezing compartment, a refrigeration system and a control system, the refrigerating compartment is hinged with a refrigerating compartment door body, the slightly freezing compartment is arranged in the refrigerating compartment, a damper for transmitting cold air from the freezing compartment to the refrigerating compartment is arranged between the freezing compartment and the refrigerating compartment, a plurality of temperature sensors and freshness sensors are installed on the slightly freezing compartment, and the temperature sensor, the freshness sensor, the refrigeration system, the door switch, and the display panel are all electrically connected to the control system. The present invention arranges the slightly freezing compartment in the refrigerating compartment, and a plurality of temperature sensors and freshness sensors are installed on the slightly freezing compartment, and judges whether the slightly freezing compartment needs refrigeration in combination with the set temperature threshold and the odor threshold, and controls the flow of cold air to the slightly freezing compartment through the damper, so as to achieve the purpose of maintaining the temperature stability of the slightly freezing compartment.

Description

Technical Field

[0001] The present invention belongs to the technical field of refrigerators, and in particular relates to a constant temperature fresh-keeping refrigerator, a constant temperature control method, and a fresh-keeping control method. Background Art

[0002] Refrigerators are the most commonly used household appliances for food preservation in people's lives. With the diversification of user needs and the improvement of living standards, people have higher and higher requirements for food preservation. Temperature is an indispensable condition for food preservation control. Food preservation requires constant temperature and suitable low temperature. Ensuring fluctuations within the smallest temperature range is more conducive to food preservation. In order to ensure constant temperature and suitable low temperature, existing refrigerators are designed with micro-freezing compartments. The micro-freezing compartment is usually arranged between the refrigeration compartment and the freezing compartment, but the direct temperature difference between the micro-freezing compartment and the freezing compartment is large, and the micro-freezing compartment is easily affected by the freezing compartment and is prone to large temperature fluctuations.

[0003] The existing Chinese invention patent with publication number CN113915854A discloses a "Refrigerator and Refrigerator Constant Temperature Control Method", in which a micro-freezing compartment is arranged in the freezer compartment of the refrigerator, and an independent heating device and hot air circuit are arranged in the micro-freezing compartment to adjust the temperature in the micro-freezing compartment, thereby avoiding the extra workload of cooling the refrigerant required for the micro-freezing compartment, so that the cold energy is fully used for refrigerating the food in the micro-freezing compartment, which is conducive to the rapid cooling of the food, thereby benefiting the preservation of the food. However, the heating device and hot air circuit of the invention have problems such as complex structure, high cost, and low assembly efficiency. Moreover, the user cannot obtain whether the food in the micro-freezing compartment is fresh. Summary of the invention

[0004] The object of the present invention is to provide a constant temperature fresh-keeping refrigerator, by arranging a micro-freezing chamber in a cold storage chamber, installing a plurality of temperature sensors and freshness sensors on the micro-freezing chamber, judging whether the micro-freezing chamber needs refrigeration in combination with a set temperature threshold, and controlling the flow of cold air from the freezing chamber to the micro-freezing chamber through a damper, so as to achieve the purpose of maintaining the temperature of the micro-freezing chamber. The problem that the existing micro-freezing chamber is arranged in the freezing chamber, and an independent heating device and a hot air circuit are arranged in the micro-freezing chamber to adjust the temperature in the micro-freezing chamber, which is complex in structure, high in cost, and low in installation efficiency is solved. Another object of the present invention is to provide a constant temperature control method for a constant temperature fresh-keeping refrigerator and a fresh-keeping control method for a constant temperature fresh-keeping refrigerator.

[0005] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0006] The present invention is a constant temperature fresh-keeping refrigerator and a constant temperature control method and a fresh-keeping control method, comprising a refrigerating compartment, a freezing compartment, a slightly freezing compartment, a refrigeration system and a control system, wherein the refrigerating compartment is hinged with a refrigerating compartment door body, the slightly freezing compartment is arranged in the refrigerating compartment, a damper for transmitting cold air from the freezing compartment to the refrigerating compartment is arranged between the freezing compartment and the refrigerating compartment, the damper comprises a first air outlet and a second air outlet, the first air outlet is connected to the refrigerating compartment, and the second air outlet is connected to the slightly freezing compartment. A door switch for detecting the opening and closing of the refrigerating compartment door body is installed in the refrigerating compartment, and a display panel is provided on the outer surface of the refrigerating compartment door body, and the display panel comprises a buzzer. A plurality of temperature sensors and freshness sensors are installed on the slightly freezing compartment, and the temperature sensor, freshness sensor, refrigeration system, damper, door switch and display panel are all electrically connected to the control system.

[0007] As a preferred technical solution of the present invention, the refrigerating compartment is arranged above the freezing compartment, and the partially freezing compartment is arranged in the lower inner part of the refrigerating compartment.

[0008] As a preferred technical solution of the present invention, the second air outlet is connected to the slightly frozen compartment through an air duct, a blower is installed in the air duct, and the blower is arranged at one end close to the second air outlet. The setting of the blower makes it easier for cold air to enter the slightly frozen compartment, speeds up air circulation, and cools down faster.

[0009] As a preferred technical solution of the present invention, the plurality of temperature sensors include a first temperature sensor and a second temperature sensor, wherein the first temperature sensor is installed on the outer surface of the micro-freezing chamber, and the second temperature sensor is installed on the inner surface of the micro-freezing chamber.

[0010] As a preferred technical solution of the present invention, the second temperature sensor and the freshness sensor are fixedly installed on the top of the micro-freezing chamber.

[0011] As a preferred technical solution of the present invention, the freshness sensor is an odor sensor.

[0012] A constant temperature control method for a constant temperature fresh-keeping refrigerator, comprising the following steps: S1: The refrigeration system operates normally, and the first temperature sensor detects the temperature t1 of the outdoor surface of the micro-freezing room, and transmits the detection data to the control system. S2: The control system determines whether the temperature t1 is less than or equal to the temperature threshold value T1*70%. If so, execute S4; if not, execute S3. S3: Keep the refrigeration system in operation, open the second air outlet, and run the blower. S4: The control system sends a signal to shut down the refrigeration system, and at the same time close the second air outlet and the blower. S5: The second temperature sensor detects the temperature t2 inside the micro-freezing room, and transmits the detection data to the control system. S6: The control system determines whether the temperature t2 is less than or equal to the threshold value T2. If so, close the second air outlet and the blower; if not, open the second air outlet and the blower;

[0013] As a preferred technical solution of the present invention, the temperature threshold T1 in S2 is the lowest temperature value detected by the first temperature sensor after running for 8 hours; the temperature threshold T2 in S6 is 0°C.

[0014] A method for controlling the freshness of a constant temperature fresh-keeping refrigerator comprises the following steps: S1: a freshness sensor continuously operates to detect odors in a slightly frozen room, and transmits the detection data to a control system. S2: the control system determines whether the detected odor value is less than an odor threshold value, if so, executes S3; if not, executes S4. S3: the freshness icon on the display panel lights up, indicating that the food is fresh. S4: the freshness icon on the display panel turns off or flashes, indicating that the food is not fresh, and executes S5. S5: the control system detects whether the door of the refrigerated compartment is open through a door switch, if so, the buzzer sounds; if not, the buzzer remains closed.

[0015] As a preferred technical solution of the present invention, the odor threshold is 25%.

[0016] The present invention has the following beneficial effects:

[0017] 1. The present invention arranges a micro-freezing chamber in a cold storage chamber, and installs a first temperature sensor and a second temperature sensor inside and outside the micro-freezing chamber respectively for detecting the internal and external temperatures of the micro-freezing chamber. It judges whether the micro-freezing chamber needs refrigeration in combination with a set temperature threshold, and controls the flow of cold air from the freezing chamber to the micro-freezing chamber through a damper, so as to achieve the purpose of maintaining the temperature of the micro-freezing chamber stable, and the temperature control is more accurate.

[0018] 2. The present invention sets a freshness sensor in the micro-freezing room. The freshness sensor is an odor sensor for detecting odors. It can detect whether the food is spoiled in time according to the set odor threshold, and issue prompts through a display panel and a buzzer to further ensure the freshness of the food.

[0019] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0021] Figure 1 It is a structural schematic diagram of a constant temperature fresh-keeping refrigerator of the present invention;

[0022] Figure 2 It is a system diagram of the constant temperature fresh-keeping refrigerator of the present invention;

[0023] Figure 3 It is a flow chart of a constant temperature control method of a constant temperature fresh-keeping refrigerator of the present invention;

[0024] Figure 4 It is a flow chart of a method for controlling a fresh-keeping constant temperature refrigerator according to the present invention;

[0025] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0026] 1-refrigeration compartment, 2-freezing compartment, 3-slightly freezing compartment, 4-air door, 401-first air outlet, 402-second air outlet, 5-first temperature sensor, 6-second temperature sensor, 7-freshness sensor, 8-blower. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "all around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0029] Embodiment 1

[0030] See also Figure 1-Figure 2As shown, this embodiment provides a constant temperature fresh-keeping refrigerator, including a refrigerating compartment 1, a freezing compartment 2, a slightly freezing compartment 3, a refrigeration system and a control system. The refrigerating compartment 1 is arranged above the freezing compartment 2, and the slightly freezing compartment 3 is arranged in the lower part of the refrigerating compartment 1. The slightly freezing compartment 3 is arranged in the refrigerating compartment 1, and a damper 4 for transmitting cold air from the freezing compartment 2 to the refrigerating compartment 1 is arranged between the freezing compartment 2 and the refrigerating compartment 1, and the damper 4 includes a first air outlet 401 and a second air outlet 402, the first air outlet 401 is connected to the refrigerating compartment 1, and the second air outlet 402 is connected to the slightly freezing compartment 3 through an air duct, and a blower 8 is installed in the air duct, and the blower 8 is arranged at one end close to the second air outlet 402.

[0031] The refrigerating compartment 1 is hinged with a refrigerating compartment door body, and a door switch for detecting the opening and closing of the refrigerating compartment door body is installed in the refrigerating compartment 1. A display panel is provided on the outer surface of the refrigerating compartment door body, and a buzzer is provided on the display panel.

[0032] A first temperature sensor 5 is installed on the outer surface of the micro-freezing chamber 3, and a second temperature sensor 6 and a freshness sensor 7 are installed on the top of the micro-freezing chamber 3. The freshness sensor 7 is an odor sensor.

[0033] Among them, the first temperature sensor 5, the second temperature sensor 6, the freshness sensor 7, the refrigeration system, the damper 4, the door switch, and the display panel are all electrically connected to the control system.

[0034] Embodiment 2

[0035] See also Figure 3 As shown, based on the first embodiment, this embodiment provides a constant temperature control method for a constant temperature fresh-keeping refrigerator, comprising the following steps:

[0036] S1: The refrigeration system operates normally, and the first temperature sensor 5 detects the temperature t1 of the outer surface of the micro-freezing chamber 3 and transmits the detection data to the control system.

[0037] S2: The control system determines whether the temperature t1 is less than or equal to the temperature threshold T1*70%. If so, S4 is executed; if not, S3 is executed.

[0038] S3: Keep the refrigeration system in operation, open the second air outlet 402, and operate the blower 8.

[0039] S4: The control system sends a signal to shut down the refrigeration system, and simultaneously shuts down the second air outlet 402 and the blower 8 .

[0040] S5: The second temperature sensor 6 detects the temperature t2 in the slightly freezing chamber 3 and transmits the detection data to the control system.

[0041] S6: The control system determines whether the temperature t2 is less than or equal to the threshold value T2, where T2 is 0° C. If yes, the second air outlet 402 and the blower 8 are closed; if no, the second air outlet 402 and the blower 8 are opened.

[0042] The temperature threshold T1 in S2 is the lowest temperature value detected by the first temperature sensor 5 after running for 8 hours.

[0043] In this embodiment, the micro-freezing chamber 3 is arranged in the refrigerating chamber 1, and the first temperature sensor 5 and the second temperature sensor 6 are respectively installed inside and outside the micro-freezing chamber 3 to detect the internal and external temperatures of the micro-freezing chamber 3. Combined with the set temperature threshold, it is judged whether the micro-freezing chamber 3 needs to be refrigerated. At the same time, the air door 4 is used to control the cold air flow from the freezing chamber 2 to the micro-freezing chamber 3, so as to achieve the purpose of maintaining the temperature of the micro-freezing chamber 3 stable, and the temperature control is more accurate.

[0044] Embodiment 3

[0045] See also Figure 4 As shown, based on the first embodiment, this embodiment provides a method for controlling the freshness of a constant temperature freshness-keeping refrigerator, comprising the following steps:

[0046] S1: The freshness sensor 7 continuously operates to detect the odor in the slightly frozen compartment 3, and transmits the detection data to the control system.

[0047] S2: The control system determines whether the detected odor value is less than the odor threshold value, which is 25%. If so, S3 is executed; if not, S4 is executed.

[0048] S3: The freshness icon on the display panel lights up, indicating that the food is fresh.

[0049] S4: The freshness icon on the display panel turns off or flashes, indicating that the food is not fresh, and S5 is executed.

[0050] S5: The control system detects whether the door of the refrigerating compartment is open through the door switch. If so, the buzzer sounds; if not, the buzzer remains closed.

[0051] In this embodiment, a freshness sensor 7 is provided in the micro-freezing chamber 3. The freshness sensor 7 is an odor sensor for detecting odors. According to the set odor threshold, it can timely detect whether the food is spoiled, and issue a prompt through the display panel and the buzzer, thereby further ensuring the freshness of the food.

[0052] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0053] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A constant temperature control method for a constant temperature fresh-keeping refrigerator, characterized in that: The constant temperature fresh-keeping refrigerator comprises a refrigerating compartment (1), a freezing compartment (2), a refrigeration system and a control system, wherein the refrigerating compartment (1) is hingedly connected to a refrigerating compartment door; The refrigerator further comprises a partially frozen compartment (3), the partially frozen compartment (3) being arranged in the refrigerating compartment (1), a damper (4) being arranged between the frozen compartment (2) and the refrigerating compartment (1) for transmitting cold air from the frozen compartment (2) to the refrigerating compartment (1), the damper (4) comprising a first air outlet (401) and a second air outlet (402), the first air outlet (401) being in communication with the refrigerating compartment (1), and the second air outlet (402) being in communication with the partially frozen compartment (3); A door switch for detecting the opening and closing of the refrigerating compartment door is installed in the refrigerating compartment (1), and a display panel is provided on the outer surface of the refrigerating compartment door, wherein the display panel includes a buzzer; A plurality of temperature sensors and freshness sensors (7) are installed on the micro-freezing chamber (3); the temperature sensors, freshness sensors (7), the refrigeration system, the damper (4), the door switch, and the display panel are all electrically connected to the control system; The refrigerating compartment (1) is arranged above the freezing compartment (2), and the slightly freezing compartment (3) is arranged in the lower part of the refrigerating compartment (1); The second air outlet (402) is connected to the slightly frozen compartment (3) via an air duct, a blower (8) is installed in the air duct, and the blower (8) is arranged at one end close to the second air outlet (402); The plurality of temperature sensors include a first temperature sensor (5) and a second temperature sensor (6), wherein the first temperature sensor (5) is installed on the outer surface of the micro-freezing chamber (3), and the second temperature sensor (6) is installed on the inner surface of the micro-freezing chamber (3); The second temperature sensor (6) and the freshness sensor (7) are fixedly installed on the top of the micro-freezing chamber (3); The constant temperature control method of the constant temperature fresh-keeping refrigerator comprises the following steps: S1: The refrigeration system operates normally, and the first temperature sensor (5) detects the temperature t1 of the outer surface of the micro-freezing chamber (3), and transmits the detection data to the control system; S2: The control system determines whether the temperature t1 is less than or equal to the temperature threshold T1*70%. If so, S4 is executed; if not, S3 is executed; S3: Keep the refrigeration system in operation, open the second air outlet (402) and operate the blower (8); S4: The control system sends a signal to shut down the refrigeration system, and simultaneously shuts down the second air outlet (402) and the blower (8); S5: the second temperature sensor (6) detects the temperature t2 in the slightly freezing chamber (3) and transmits the detection data to the control system; S6: The control system determines whether the temperature t2 is less than or equal to the threshold value T2. If so, the second air outlet (402) and the blower (8) are closed; if not, the second air outlet (402) and the blower (8) are opened; The temperature threshold T1 in S2 is the lowest temperature value detected by the first temperature sensor (5) after running for 8 hours; the temperature threshold T2 in S6 is 0°C.

2. A constant temperature control method for a constant temperature fresh-keeping refrigerator according to claim 1, characterized in that: The freshness sensor (7) is an odor sensor.

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