A constant temperature and humidity drawer assembly and a refrigerator

Abstract

The application provides a constant temperature and humidity drawer assembly and a refrigerator. The drawer assembly comprises a sealed cavity, a drawer assembly arranged in the sealed cavity, an evaporator and a fan arranged outside the sealed cavity, a temperature and humidity sensor and a compensation heater arranged in the drawer assembly, and a controller. The controller is configured to obtain a target temperature and a target humidity, and control the evaporator, the fan, the compensation heater, the temperature sensor, a first air duct and a second air duct to open or close based on the humidity and the temperature in the drawer assembly, so that the humidity and the temperature in the drawer assembly meet the constant temperature and humidity condition. The minimum temperature adjustment range in the drawer assembly is 0.1 DEG C, and the minimum humidity adjustment range is 0.1%. The problem that the current refrigerator needs to add a humidifying device in the refrigerator to meet the user's demand for adjusting the humidity in the refrigerator, resulting in high manufacturing cost of the refrigerator, large power consumption and large noise of the humidifying device during operation is solved.

Description

Technical Field

[0001] This application relates to the field of refrigeration equipment technology, and in particular to a constant temperature and humidity drawer assembly and a refrigerator. Background Technology

[0002] Refrigerators are now widely used in people's daily lives. As people's living standards improve, their requirements for various refrigerator performances also increase. Among these, the refrigerator's heat preservation and moisture retention performance has become an important reference indicator for refrigerator quality.

[0003] Currently, the refrigerators on the market only have temperature control capabilities, lacking humidity control devices. This makes them unsuitable for the different temperature and humidity requirements of all foods, failing to meet user needs. On the other hand, to meet users' humidity control needs, additional humidifiers need to be added inside the refrigerator. However, this results in high manufacturing costs, high power consumption, and loud noise during operation. Furthermore, mold easily grows inside and around the humidifier. Summary of the Invention

[0004] This application provides a constant temperature and humidity drawer assembly and refrigerator to solve the technical problem that existing refrigerators require an additional humidifier to meet users' needs for humidity regulation, resulting in high manufacturing costs, high power consumption, and loud noise during operation of the humidifier. Moreover, the humidifier and its surroundings are prone to mold growth.

[0005] The first aspect of this application provides a temperature and humidity constant drawer assembly, comprising:

[0006] Sealed cavity;

[0007] A drawer assembly is disposed within the sealed cavity, and the drawer assembly is slidably connected to the sealed cavity;

[0008] An evaporator and a fan are disposed outside the sealed cavity; the fan is provided with a first air duct and a second air duct.

[0009] A temperature and humidity sensor and a compensating heater are disposed within the drawer assembly. The temperature and humidity sensor is configured to:

[0010] Obtain the humidity and temperature inside the drawer assembly;

[0011] The compensation heater is configured as follows:

[0012] Increase the temperature inside the drawer assembly;

[0013] A temperature sensor, electrically connected to the evaporator, is configured to:

[0014] Obtain the temperature of the evaporator;

[0015] The controller, which is electrically connected to the evaporator, fan, temperature and humidity sensor, compensating heater, and temperature sensor, is configured to:

[0016] The system acquires target temperature and target humidity, and based on the humidity and temperature inside the drawer assembly, controls the evaporator, fan, compensating heater, temperature sensor, first air duct, and second air duct to open or close, ensuring that the humidity and temperature inside the drawer assembly meet constant temperature and humidity conditions. These constant temperature and humidity conditions are defined as follows: the absolute value of the difference between the humidity inside the drawer assembly and the target humidity is less than or equal to 5%; the absolute value of the difference between the temperature inside the drawer assembly and the target temperature is less than or equal to 0.5℃; and the minimum temperature adjustment range inside the drawer assembly is 0.1℃, and the minimum humidity adjustment range is 0.1%.

[0017] In some embodiments, a first air duct assembly is provided on the first air duct;

[0018] The first air duct assembly includes:

[0019] The first valve and the first return air inlet are installed on the sealed cavity;

[0020] The fan blows cold air into the sealed cavity along the first air duct through the first valve, and returns it to the evaporator from the first return air inlet.

[0021] In some embodiments, a second air duct assembly is provided on the second air duct;

[0022] The second air duct assembly includes:

[0023] A second valve is provided on the sealed cavity;

[0024] A second return air vent is provided on the drawer assembly, and the second return air vent and the second valve are opened or closed simultaneously.

[0025] The fan blows cold air into the drawer assembly through the second air duct via the second valve, through the notch on the drawer assembly, and returns it to the evaporator from the second return air inlet via the first return air inlet.

[0026] In some embodiments, the controller is further configured to:

[0027] Obtain the target temperature and target humidity;

[0028] Based on the target temperature and target humidity, calculate the start-up temperature, shutdown temperature, start-up humidity, and shutdown humidity;

[0029] The temperature inside the drawer assembly is compared with the start-up temperature and the stop-down temperature; if the temperature inside the drawer assembly is greater than the start-up temperature, the fan and the first valve are controlled to open.

[0030] If the temperature inside the drawer assembly is less than or equal to the stop point temperature within a preset time, then control the first valve to close and determine if the humidity inside the drawer assembly is greater than the start point humidity.

[0031] If so, control the fan to stop until the temperature of the evaporator is lower than the dew point temperature inside the drawer assembly; control the second valve, compensating heater, fan, and second return air vent to open until the humidity inside the drawer assembly is less than or equal to the humidity at the shutdown point; control the fan, first valve, second valve, and second return air vent to close so that the humidity and temperature inside the drawer assembly meet the constant temperature and humidity conditions.

[0032] In some embodiments, after the step of obtaining whether the temperature inside the drawer assembly within a preset time period is less than or equal to the stop point temperature, the method further includes:

[0033] If not, control the fan, second valve, and second return air vent to open, and the compensation heater to close, until the temperature inside the drawer assembly is less than or equal to the shutdown point temperature. Then, control the first valve to close and execute the step of determining whether the humidity inside the drawer assembly is greater than the startup point humidity.

[0034] In some embodiments, after determining whether the humidity inside the drawer assembly is greater than the humidity at the power-on point, the method further includes:

[0035] If not, then control the second valve, the second return air inlet, and the compensation heater to close.

[0036] In some embodiments, the controller is further configured to:

[0037] If the temperature inside the drawer assembly is lower than the shutdown point temperature, then the first valve, the second valve, and the second return air vent are closed, and the compensation heater is turned on, until the temperature inside the drawer assembly is greater than or equal to the startup point temperature, and then the step of determining whether the humidity inside the drawer assembly is greater than the startup point humidity is executed.

[0038] In some embodiments, the controller is further configured to:

[0039] If the temperature inside the drawer assembly is not lower than the stop point temperature and not higher than the start point temperature, then the step of determining whether the humidity inside the drawer assembly is higher than the start point humidity is performed.

[0040] In some embodiments, the drawer assembly includes:

[0041] The drawer body has a drawer cover that is snapped into its opening; the drawer body is slidably connected to the sealed cavity.

[0042] A pull-out panel is connected to the drawer body via a fixed connector; the pull-out panel and the sealed cavity are tightly connected via a seal.

[0043] A second aspect of this application provides a refrigerator, comprising:

[0044] A temperature and humidity constant drawer assembly as described in any of the first aspects above.

[0045] This application provides a constant temperature and humidity drawer assembly and a refrigerator. The drawer assembly includes: a sealed cavity; a drawer assembly disposed within the sealed cavity, the drawer assembly being slidably connected to the sealed cavity; an evaporator and a fan disposed outside the sealed cavity; the fan being provided with a first air duct and a second air duct; a temperature and humidity sensor and a compensating heater disposed within the drawer assembly, the temperature and humidity sensor being configured to: acquire the humidity and temperature within the drawer assembly; the compensating heater being configured to: increase the temperature within the drawer assembly; a temperature sensor electrically connected to the evaporator, the temperature sensor being configured to: acquire the temperature of the evaporator; and a controller electrically connected to the evaporator, the fan, the temperature and humidity sensor, the compensating heater, and the temperature sensor, the controller being configured to: acquire a target temperature and a target humidity. The system controls the opening and closing of the evaporator, fan, compensating heater, temperature sensor, first air duct, and second air duct based on the humidity and temperature inside the drawer assembly, ensuring that the humidity and temperature inside the drawer assembly meet constant temperature and humidity conditions. These constant temperature and humidity conditions are defined as follows: the absolute value of the difference between the humidity inside the drawer assembly and the target humidity is less than or equal to 5%; the absolute value of the difference between the temperature inside the drawer assembly and the target temperature is less than or equal to 0.5℃; and the minimum temperature adjustment range inside the drawer assembly 2 is 0.1℃, and the minimum humidity adjustment range is 0.1%. This addresses the drawbacks of current refrigerators, which require additional humidifiers to meet user humidity control needs, resulting in high manufacturing costs, high power consumption, and loud noise during operation. Furthermore, the humidifiers themselves are prone to mold growth inside and around the humidifier. Attached Figure Description

[0046] To more clearly illustrate the technical solution of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0047] Figure 1 This is a schematic diagram of the temperature and humidity constant drawer assembly in this application;

[0048] Figure 2 The flowchart shows a method for controlling the constant temperature and humidity drawer assembly in one embodiment of this application.

[0049] Figure 3 This is a flowchart of another embodiment of the control method for the constant temperature and humidity drawer assembly in this application.

[0050] Explanation of reference numerals in the attached figures:

[0051] 1-Sealed cavity; 2-Drawer assembly; 21-Drawer body; 22-Drawer cover; 23-Pull-out panel; 24-Fixed connector; 25-Sealing component; 3-Evaporator; 4-Fan; 41-First valve; 42-First return air vent; 43-Second valve; 44-Second return air vent; 5-Temperature and humidity sensor; 6-Compensating heater; 7-Temperature sensor; 8-Controller. Detailed Implementation

[0052] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of this application.

[0053] In some technologies, refrigerators require an additional humidifier to meet users' humidity control needs. This results in high manufacturing costs, high power consumption, and loud noise from the humidifier. Furthermore, mold easily grows inside and around the humidifier. To address this problem, this application provides a temperature and humidity-controlled drawer assembly and a refrigerator. The structure of each part of the temperature and humidity-controlled drawer assembly and refrigerator is described below:

[0054] Depend on Figure 1As can be seen, the first aspect of this application provides a constant temperature and humidity drawer assembly, including: a sealed cavity 1; the inner wall of the sealed cavity 1 is provided with heat insulation measures, the heat insulation measures including: heat insulation material, double-layer hollow, vacuuming, etc.; a drawer assembly 2 disposed in the sealed cavity 1, the drawer assembly 2 being slidably connected to the sealed cavity 1; a first air duct is provided between the outer surface of the drawer assembly 2 and the inner surface of the sealed cavity 1, providing a spatial distance for cold air to pass through; an evaporator 3 and a fan 4 disposed outside the sealed cavity 1; the fan 4 is provided with a first air duct and a second air duct, such as... Figure 1 As shown; a temperature and humidity sensor 5 and a compensating heater 6 are installed inside the drawer assembly 2. The temperature and humidity sensor 5 is configured to acquire the humidity and temperature inside the drawer assembly 2; the compensating heater 6 is configured to increase the temperature inside the drawer assembly 2; the compensating heater 6 is located near the second air duct; the installation of the compensating heater 6 can prevent the temperature inside the drawer assembly 2 from exceeding the preset start-up and shutdown temperature range during the humidification process; a temperature sensor 7 is electrically connected to the evaporator 3 and is configured to acquire the temperature of the evaporator 3; a controller 8 is electrically connected to the evaporator 3, the fan 4, the temperature and humidity sensor 5, the compensating heater 6, and the temperature sensor 7, and is configured to:

[0055] The system acquires target temperature and humidity, and based on the humidity and temperature within the drawer assembly 2, controls the evaporator 3, fan 4, compensating heater 6, temperature sensor 7, first air duct, and second air duct to open or close, ensuring that the humidity and temperature within the drawer assembly 2 meet constant temperature and humidity conditions. These constant temperature and humidity conditions are defined as follows: the absolute value of the difference between the humidity within the drawer assembly 2 and the target humidity is less than or equal to 5%; the absolute value of the difference between the temperature within the drawer assembly 2 and the target temperature is less than or equal to 0.5℃; the minimum temperature adjustment range within the drawer assembly 2 is 0.1℃, and the minimum humidity adjustment range is 0.1%. The target temperature and humidity can be acquired by the user inputting the name of the food item on the smart device, which then retrieves the corresponding values ​​from the controller 8; or by selecting a specific setting on the controller 8, which then retrieves the corresponding target temperature and humidity values; or by directly setting the target temperature and humidity on the display. These methods are not limited here.

[0056] This application provides a drawer assembly with constant temperature and humidity, which has the following advantages:

[0057] Advantage 1: Adjustable temperature and humidity. Temperature adjustment range: -30℃ to 20℃, minimum temperature adjustment increment: 0.1℃; Humidity adjustment range: 15% to 100%, minimum humidity adjustment increment: 0.1%.

[0058] Advantage 2: Constant temperature and humidity. Temperature fluctuations can be controlled within ±0.5℃, and humidity fluctuations within 5%.

[0059] Advantage 3: Traditional temperature control in designated zones typically ranges from 0 to 8°C, making it impossible to achieve high humidity or adjust humidity below freezing. Above freezing, temperature control only allows for two vague adjustments: humidity below 45% or above 90%. This application offers a wider temperature control range: -30°C to 20°C with a minimum adjustment increment of 0.1°C. It also offers a wider humidity control range: generally 15% to 100% with a minimum adjustment increment of 0.1%. This allows it to meet the precise temperature and humidity requirements of various food ingredients.

[0060] This application provides a temperature and humidity constant drawer assembly, solving the problem of one or more temperature and humidity levels being unadjustable in refrigerators, without requiring additional humidification devices. It utilizes the refrigerator's own refrigeration and airflow system (i.e., the first and second air ducts) to achieve a dedicated zone where both temperature and humidity are adjustable and constant. The temperature and humidity of this dedicated zone can be independently adjusted to meet the storage temperature and humidity requirements of any food item.

[0061] Depend on Figure 1 It is known that a first air duct assembly is provided on the first air duct; the first air duct assembly includes: a first valve 41 and a first return air inlet 42 disposed on the sealed cavity 1; wherein, the fan 4 blows cold air into the sealed cavity 1 along the first air duct through the first valve 41, and returns it to the evaporator 3 from the first return air inlet 42. The temperature inside the sealed cavity 1 is controlled to fluctuate within a threshold range by the first air duct, and the temperature is circulated and cooled around the drawer assembly 2.

[0062] Depend on Figure 1It is known that a second air duct assembly is provided on the second air duct; the second air duct assembly includes: a second valve 43 disposed on the sealed cavity 1; and a second return air inlet 44 disposed on the drawer assembly 2. The second return air inlet 44 and the second valve 43 open or close simultaneously. The second return air inlet 44 can be one of mechanical, lightweight baffle, or electronic types, and opens or closes simultaneously with the second valve 43. The fan 4 blows cold air along the second air duct through the second valve 43 into the drawer assembly 2 through the notch on the drawer assembly 2, and returns it from the second return air inlet 44 to the evaporator 3 via the first return air inlet 42. The second air duct penetrates deep into the drawer assembly 2 to perform isothermal dehumidification. Dehumidification is performed only after temperature control, and the temperature of the drawer assembly 2 is kept constant during dehumidification by a compensating heater 6. During dehumidification, the temperature will not exceed the preset start-up and shutdown temperature range. The second return air vent 44 is equipped with a controllable opening and closing structure. When the second air duct is not dehumidifying, the closed second valve 43 and second return air vent 44 keep the drawer assembly 2 relatively sealed, maintaining the humidity inside the drawer assembly 2. When the second valve 43 is opened, the second return air vent 44 also opens, allowing the second air duct inside the drawer assembly 2 to circulate. Therefore, a relatively wide humidity control range of 15% to 100% is achieved. The first and second air ducts provide auxiliary cooling.

[0063] Depend on Figure 2 and Figure 3 It can be seen that the controller 8 is also configured as follows:

[0064] S1: Obtain the target temperature T and target humidity H; calculate the power-on temperature T based on the target temperature T and target humidity H. on Stop point temperature T Off Humidity at startup (H) on Humidity at the shutdown point H Off Start-up temperature T on = Target temperature T + natural number; Stop point temperature T Off =Start-up temperature T on - Natural number; Humidity at startup (H) on = Target humidity H + natural number; Humidity at shutdown point H Off = Humidity at startup H on - Natural numbers; the range of values ​​for the natural numbers is from 0.5 to 15.

[0065] S2: Compare the temperature inside the drawer assembly 2 with the power-on temperature T. on Stop point temperature T Off If the temperature inside the drawer assembly 2 is greater than the start-up temperature T... on Then, the fan 4 and the first valve 41 are opened.

[0066] S3: Determine whether the temperature inside the drawer assembly 2 within a preset time is less than or equal to the stop point temperature T. Off If so, S8: then control the first valve 41 to close and execute step S5: determine whether the humidity inside the drawer assembly 2 is greater than the humidity H at the start-up point. on .

[0067] S6: If so, control the fan 4 to stop until the temperature of the evaporator 3 is lower than the dew point temperature A inside the drawer assembly 2; control the second valve 43, the compensating heater 6, the fan 4, and the second return air vent 44 to open until the humidity inside the drawer assembly 2 is less than or equal to the humidity at the shutdown point; then control the fan 4, the first valve 41, the second valve 43, and the second return air vent 44 to close, so that the humidity and temperature inside the drawer assembly 2 meet the constant temperature and humidity conditions. The dew point temperature A is calculated using the real-time temperature and relative humidity inside the drawer assembly 2.

[0068] After the step of determining whether the temperature inside the drawer assembly 2 within a preset time period is less than or equal to the stop point temperature, the method further includes:

[0069] S10: If not, control the fan 4, the second valve 43, and the second return air vent 44 to open, and the compensation heater 6 to close, until the temperature inside the drawer assembly 2 is less than or equal to the shutdown point temperature, control the first valve 41 to close, and execute the step of judging whether the humidity inside the drawer assembly 2 is greater than the startup point humidity.

[0070] After the step of determining whether the humidity inside the drawer assembly 2 is greater than the humidity at the power-on point, the method further includes:

[0071] S7: If not, then control the second valve 43, the second return air inlet 44, and the compensation heater 6 to close.

[0072] The controller 8 is also configured to:

[0073] S4: If the temperature inside the drawer assembly 2 is lower than the shutdown point temperature, then control the first valve 41, the second valve 43, and the second return air vent 44 to close, and the compensation heater 6 to turn on, until the temperature inside the drawer assembly 2 is greater than or equal to the startup point temperature, and then execute the step of determining whether the humidity inside the drawer assembly 2 is greater than the startup point humidity.

[0074] The controller 8 is also configured to:

[0075] If the temperature inside the drawer assembly 2 is not less than the stop point temperature and not greater than the start point temperature, then the step of determining whether the humidity inside the drawer assembly 2 is greater than the start point humidity is executed.

[0076] Depend on Figure 1 It is understood that the drawer assembly 2 includes: a drawer body 21, with a drawer cover 22 snapped onto the opening of the drawer body 21; the drawer body 21 is slidably connected to the sealed cavity 1; a pull-out panel 23, which is connected to the drawer body 21 via a fixing connector 24; the pull-out panel 23 and the sealed cavity 1 are tightly connected via a sealing member 25. The fixing connector 24 is a buckle, screw, etc., and the drawer body 21 can move horizontally and synchronously as a whole via the pull-out panel 23.

[0077] This application provides a temperature and humidity constant drawer assembly with two independent air paths: a first air duct and a second air duct. The first air duct controls the temperature within the sealed cavity 1 to fluctuate within a threshold range, while the second air duct dehumidifies the drawer assembly 2 at an isothermal temperature. Dehumidification is only performed after temperature control, with compensating heating to maintain a constant temperature during dehumidification. During dehumidification, the temperature will not exceed the preset start-up and shutdown temperature range. The second return air vent 44 has a controllable opening and closing structure. When the second air duct is not dehumidifying, the closed second valve 43 and second return air vent 44 keep the drawer assembly 2 relatively sealed, maintaining humidity. Opening the second valve 43 and second return air vent 44 allows the second air duct within the drawer assembly 2 to circulate. Therefore, a relatively wide humidity control range of 15% to 100% is achieved. The first air duct circulates and cools the drawer assembly 2 from the outside, while the second air duct provides auxiliary cooling.

[0078] A second aspect of this application provides a refrigerator, including a temperature and humidity constant drawer assembly as described in any of the above embodiments. The effects of the refrigerator during operation can be found in the effects of the temperature and humidity constant drawer assembly embodiments described above, and will not be repeated here.

[0079] This application provides a constant temperature and humidity drawer assembly and a refrigerator, with specific embodiments as follows:

[0080] When a user wants to store spinach, they input a target temperature of 2℃ and a target humidity of 90%. After obtaining the target temperature T = 2℃ and humidity H = 90%, the value of T is calculated. on =2.5℃ and T off =1.5℃, H on =92% and H off =88%; Determine the real-time temperature t of the current drawer assembly 2 and the start-up temperature T. on Stop point temperature T Off Make comparisons.

[0081] Example 1: If the real-time temperature t is detected to be 5℃, then the real-time temperature t > the start-up temperature T. onThe timing begins, and the cooling process in step S3 is executed. This involves controlling the evaporator 3 to cool down, the fan 4 to start, the first valve 41 to open, and the first air duct circulation to begin. The air circulates between the outer wall of the entire drawer assembly 2 and the inner wall of the sealed cavity 1 until the temperature and humidity sensor 5 collects a reading of t = T. off After the cooling is achieved within time X, the first valve 41 closes, and the humidity determination process S5 step is performed: determine whether the real-time humidity h of the current drawer assembly 2 is greater than the threshold H. on =92%. If the real-time humidity h = 99% > 92%, then the evaporator 3 is cooled down, and the fan 4 stops, until the temperature sensor 7 detects that the temperature of the evaporator 3 is below 4.9℃. Then, the second valve 43 opens, the compensating heater 6 turns on, the fan 4 turns on, the second return air vent 44 turns on, and the second air duct turns on. The compensating heater 6 ensures that the temperature inside the drawer assembly 2 does not decrease due to dehumidification, forcing the high-humidity air out of the drawer assembly 2 and then out of the sealed cavity 1 through the first return air vent 42 to be condensed and removed from the evaporator 3, until the real-time humidity h of the drawer assembly 2 drops to H. off A is the dew point temperature calculated from the real-time temperature t and real-time humidity h inside the drawer, which is 4.9℃. (Isothermal dehumidification process) After the process is completed, the second valve 43 is closed, the second return air vent 44 is closed, and the compensation heater 6 is closed. If the cooling is not achieved within time X, the second air duct is used for auxiliary cooling. At this time, the evaporator 3 is cooled, the fan 4 is turned on, the second valve 43 is opened, the compensation heater 6 is closed, and the second return air vent 44 is opened. The first and second air ducts are opened simultaneously to perform cooling, which is suitable for situations where a large heat load is placed and the initial temperature inside the sealed cavity 1 is very high.

[0082] Example 2: If it is detected that t is 0℃ at this time, satisfying t < T off Then, the heating process in step S4 is executed: the compensation heater 6 is turned on until the temperature rises back to 2.5℃. After this is achieved, the humidity determination process S5 is executed: it is determined whether the real-time humidity h of the current sealed drawer is greater than the threshold H. on =92%. If the real-time humidity h = 99% > 92%, then the evaporator 3 will be cooled down and the fan 4 will stop. This continues until the temperature sensor 7 detects that the temperature of the evaporator 3 is below 4.9℃. At this point, the second valve 43 will open, the compensating heater 6 will turn on, the fan 4 will turn on, the second return air vent 44 will open, and the second air duct will open. The compensating heater 6 ensures that the temperature inside the drawer assembly 2 will not decrease due to dehumidification, forcing the high-humidity air out of the drawer assembly 2 and then out of the sealed cavity 1 through the first air duct to be condensed and removed by the low-temperature evaporator 3, until the real-time humidity h drops to the shutdown point humidity H. off A is the dew point temperature calculated from the real-time temperature t and real-time humidity h inside the drawer, which is 4.9℃. (Isothermal dehumidification process) After the process is completed, control the second valve 43 to close, the second return air vent 44 to close, and the compensation heater 6 to close.

[0083] Example 3: If t = 1.8℃ satisfies T off ≤t≤T on If the humidity is not controlled, then execute the S5 humidity control process; execute the humidity determination S5 process: determine whether the current real-time humidity h of the sealed drawer is greater than the threshold H. on =92%. If the real-time humidity h = 99% > 92%, then the evaporator 3 will be cooled down and the fan 4 will stop. This continues until the temperature sensor 7 detects that the temperature of the evaporator 3 is below 4.9℃. Then, the second valve 43 will open, the compensating heater 6 will turn on, the fan 4 will turn on, the second return air vent 44 will open, and the second air duct will open. The compensating heater 6 ensures that the temperature inside the drawer assembly 2 will not decrease due to dehumidification, forcing the high-humidity air out of the drawer assembly 2 and then out of the sealed cavity 1 through the first return air vent 42 to be condensed and removed from the evaporator 3, until the real-time humidity h drops to the shutdown point humidity H. off A is the dew point temperature calculated from the real-time temperature t and real-time humidity h inside the drawer, which is 4.9℃. (Isothermal dehumidification process) After the process is completed, the second valve 43, the second return air vent 44, and the compensation heater 6 are closed. The status of step S2 is judged in real time. If both the temperature control and humidity control processes are completed, then step S9 is executed: the evaporator 3 stops cooling, and the fan 4, the first valve 41, the second valve 43, and the second return air vent 44 are closed.

[0084] The above detailed embodiments further illustrate the purpose, technical solution, and beneficial effects of the embodiments of this application. It should be understood that the above are merely specific embodiments of the embodiments of this application and are not intended to limit the protection scope of the embodiments of this application. Any modifications, equivalent substitutions, improvements, etc., made on the basis of the technical solutions of the embodiments of this application should be included within the protection scope of the embodiments of this application.

Claims

1. A temperature and humidity constant drawer assembly, characterized in that, include: Sealed cavity (1); The drawer assembly (2) is disposed within the sealed cavity (1), and the drawer assembly (2) is slidably connected within the sealed cavity (1); An evaporator (3) and a fan (4) are disposed outside the sealed cavity (1); the fan (4) is provided with a first air duct and a second air duct; A temperature and humidity sensor (5) and a compensating heater (6) are disposed within the drawer assembly (2). The temperature and humidity sensor (5) is configured as follows: Obtain the humidity and temperature inside the drawer assembly (2); The compensation heater (6) is configured as follows: Increase the temperature inside the drawer assembly (2); Temperature sensor (7), which is electrically connected to the evaporator (3), is configured to: Obtain the temperature of the evaporator (3); Controller (8), which is electrically connected to the evaporator (3), fan (4), temperature and humidity sensor (5), compensating heater (6), and temperature sensor (7), is configured to: The target temperature and target humidity are obtained, and based on the humidity and temperature inside the drawer assembly (2), the evaporator (3), fan (4), compensating heater (6), temperature sensor (7), first air duct, and second air duct are controlled to open or close, so that the humidity and temperature inside the drawer assembly (2) meet the constant temperature and humidity conditions; the constant temperature and humidity conditions are that the absolute value of the difference between the humidity inside the drawer assembly (2) and the target humidity is less than or equal to 5%; the absolute value of the difference between the temperature inside the drawer assembly (2) and the target temperature is less than or equal to 0.5℃; the minimum temperature adjustment range inside the drawer assembly (2) is 0.1℃, and the minimum humidity adjustment range is 0.1%. The first air duct is equipped with a first air duct assembly; The first air duct assembly includes: The first valve (41) and the first return air inlet (42) are provided on the sealed cavity (1); The fan (4) blows cold air into the sealed cavity (1) along the first air duct through the first valve (41) and returns it to the evaporator (3) from the first return air port (42). The second air duct is equipped with a second air duct assembly; The second air duct assembly includes: The second valve (43) is installed on the sealed cavity (1); The second return air vent (44) is provided on the drawer assembly (2), and the second return air vent (44) and the second valve (43) are opened or closed simultaneously; The fan (4) blows cold air into the drawer assembly (2) through the second air duct via the second valve (43) and through the notch on the drawer assembly (2), and returns it to the evaporator (3) from the second return air port (44) via the first return air port (42). The controller (8) is also configured to: Obtain the target temperature and target humidity; Based on the target temperature and target humidity, calculate the start-up temperature, shutdown temperature, start-up humidity, and shutdown humidity; Compare the temperature inside the drawer assembly (2) with the start-up temperature and the stop-down temperature; if the temperature inside the drawer assembly (2) is greater than the start-up temperature, then control the fan (4) and the first valve (41) to open; If the temperature inside the drawer assembly (2) within a preset time is less than or equal to the stop point temperature, then control the first valve (41) to close and determine whether the humidity inside the drawer assembly (2) is greater than the start point humidity. If so, control the fan (4) to stop until the temperature of the evaporator (3) is lower than the dew point temperature inside the drawer assembly (2); control the second valve (43), the compensation heater (6), the fan (4), and the second return air vent (44) to open until the humidity inside the drawer assembly (2) is less than or equal to the humidity at the shutdown point; control the fan (4), the first valve (41), the second valve (43), and the second return air vent (44) to close so that the humidity and temperature inside the drawer assembly (2) meet the constant temperature and humidity conditions. The controller (8) is also configured to: If the temperature inside the drawer assembly (2) is lower than the shutdown point temperature, the first valve (41), the second valve (43), and the second return air vent (44) are closed, and the compensation heater (6) is turned on until the temperature inside the drawer assembly (2) is greater than or equal to the startup point temperature, and the step of determining whether the humidity inside the drawer assembly (2) is greater than the startup point humidity is executed. The controller (8) is also configured to: If the temperature inside the drawer assembly (2) is not less than the stop point temperature and not greater than the start point temperature, then the step of determining whether the humidity inside the drawer assembly (2) is greater than the start point humidity is executed.

2. The constant temperature and humidity drawer assembly according to claim 1, characterized in that, After the step of determining whether the temperature inside the drawer assembly (2) within a preset time period is less than or equal to the stop point temperature, the method further includes: If not, control the fan (4), the second valve (43), and the second return air inlet (44) to open, and the compensation heater (6) to close, until the temperature inside the drawer assembly (2) is less than or equal to the shutdown point temperature, control the first valve (41) to close and execute the step of judging whether the humidity inside the drawer assembly (2) is greater than the startup point humidity.

3. The constant temperature and humidity drawer assembly according to claim 1, characterized in that, After the step of determining whether the humidity inside the drawer assembly (2) is greater than the humidity at the power-on point, the method further includes: If not, then control the second valve (43), the second return air inlet (44), and the compensation heater (6) to close.

4. A drawer assembly with constant temperature and humidity according to claim 1, characterized in that, The drawer assembly (2) includes: The drawer body (21) has a drawer cover (22) snapped into its opening; the drawer body (21) is slidably connected to the sealed cavity (1); A pull-out panel (23) is connected to the drawer body (21) via a fixing connector (24); The pull-out panel (23) and the sealed cavity (1) are tightly connected by a seal (25).

5. A refrigerator, characterized in that, include: A temperature and humidity constant drawer assembly as described in any one of claims 1 to 4 above.

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