Refrigeration house defrosting assembly, refrigeration house air conditioning system and control method of refrigeration house air conditioning system
By setting up a dual refrigeration component system in the cold storage and actively frosting in the cold storage using semiconductor refrigeration devices, the problem of warehouse temperature fluctuations caused by cold storage defrost is solved, and the temperature stability in the cold storage is achieved.
Patent Information
- Application Number
- CN202411818770.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-11
- Publication Date
- 2025-03-04
AI Technical Summary
Existing cold storage defrosting methods will cause fluctuations in the warehouse temperature and affect cargo storage.
A dual refrigeration component system is adopted, wherein the first refrigeration component includes an evaporator of the refrigerant circulation circuit is arranged in the cold storage, and the second refrigeration component includes a semiconductor refrigeration device is arranged in the cold storage. When the frosting critical point is reached, the second refrigeration component performs refrigeration frosting to avoid frosting of the evaporator of the first refrigeration component.
Through active defrosting, the humidity in the cold storage is reduced, temperature fluctuations are avoided, and the temperature stability in the cold storage is ensured.
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Figure CN119554820A_ABST
Abstract
Description
Technical Field
[0001] The present application belongs to the technical field of cold storage air conditioning systems, and specifically relates to a cold storage defrosting component and a cold storage air conditioning system and a control method thereof. Background Art
[0002] At present, the main defrosting method for cold storage is to defrost the evaporator through various heating methods after the evaporator is frosted. The heating defrosting methods used in this defrosting include electric heating defrosting, hot air recovery defrosting, energy storage defrosting, etc.; because the evaporator end needs to be heated during this passive defrosting, the warehouse temperature fluctuates easily during defrosting, which is not conducive to the storage of goods. Summary of the invention
[0003] Therefore, the present application provides a cold storage defrosting component and a cold storage air conditioning system and a control method thereof, which can solve the problem in the prior art that cold storage defrosting may cause storage temperature fluctuations.
[0004] In order to solve the above problems, the present application provides a cold storage defrosting component, including:
[0005] A first refrigeration component includes a refrigerant circulation loop, wherein an evaporator in the refrigerant circulation loop is arranged in the cold storage;
[0006] The second refrigeration component includes a refrigeration unit, which is arranged in the cold storage; when the critical point of frosting is reached in the cold storage, the refrigeration unit performs refrigeration and frosting.
[0007] In some embodiments,
[0008] The second refrigeration component includes a semiconductor refrigeration device, which includes an N-type semiconductor, a P-type semiconductor and a DC power supply. The N-type semiconductor and the P-type semiconductor are arranged side by side, the first ends of the two are connected, and the second ends are respectively connected to the DC power supply to form the semiconductor refrigeration device; the first end is set as a cold end, and the refrigeration part includes the cold end.
[0009] In some embodiments,
[0010] The semiconductor refrigeration device also includes a switching structure, and the switching structure is used to change the current direction of the DC power supply flowing to the N-type semiconductor or the P-type semiconductor.
[0011] In some embodiments,
[0012] There are multiple N-type semiconductors and multiple P-type semiconductors. One P-type semiconductor is arranged between every two N-type semiconductors, and one N-type semiconductor is arranged between every two P-type semiconductors.
[0013] According to another aspect of the present application, a cold storage air conditioning system is provided, comprising the cold storage defrosting assembly as described above.
[0014] In some embodiments,
[0015] The cold storage air conditioning system also includes a temperature sensor and a humidity sensor. The temperature sensors include at least two: a first temperature sensor and a second temperature sensor. The humidity sensors include at least two: a first humidity sensor and a second humidity sensor. The first temperature sensor is used to monitor the temperature at the evaporator, and the first humidity sensor is used to monitor the humidity at the evaporator; the second temperature sensor is used to monitor the temperature at the cold storage door, and the second humidity sensor is used to monitor the humidity at the cold storage door.
[0016] According to another aspect of the present application, a control method for the cold storage air conditioning system as described above is provided, comprising:
[0017] Acquire monitoring data of the temperature sensor and the humidity sensor in the cold storage;
[0018] Compare the acquired temperature and humidity values with the preset frosting temperature and humidity in the cold storage;
[0019] According to the temperature and humidity comparison result, the operation states of the first refrigeration component and the second refrigeration component are controlled respectively.
[0020] In some embodiments,
[0021] The control method includes a normal operating mode, and the normal operating mode is set as:
[0022] The data monitored by the first temperature sensor and the second temperature sensor, the first humidity sensor and the second humidity sensor are all lower than the preset frosting temperature and humidity, so the first refrigeration component is regulated to operate for cooling and the second refrigeration component is stopped.
[0023] In some embodiments,
[0024] The control method further includes a forced cooling mode, wherein the forced cooling mode is set as follows:
[0025] The data monitored by the first temperature sensor and the second temperature sensor, and the first humidity sensor and the second humidity sensor are all higher than the preset frosting temperature and humidity, and the first refrigeration component is regulated to operate refrigeration and cooling, and the second refrigeration component is regulated to operate refrigeration and cooling;
[0026] The normal operation mode is entered when the data monitored by the first temperature sensor and the second temperature sensor, and the first humidity sensor and the second humidity sensor are all lower than the preset frosting temperature and humidity.
[0027] In some embodiments,
[0028] The control method includes a defrost mode, and the defrost mode is set to:
[0029] The data monitored by the second temperature sensor and the second humidity sensor reach the preset frosting temperature and humidity, while the data monitored by the first temperature sensor and the first humidity sensor are lower than the preset frosting temperature and humidity, and the first refrigeration component is regulated to operate refrigeration and cooling, and the second refrigeration component is regulated to operate refrigeration and frosting;
[0030] When the data monitored by the second temperature sensor and the second humidity sensor are both lower than the preset frosting temperature and humidity, the second refrigeration component includes a semiconductor refrigeration device, and the current direction of the semiconductor refrigeration device is adjusted until defrosting of the refrigeration part of the second refrigeration component is completed.
[0031] In some embodiments,
[0032] The control method further includes a forced defrost mode, and the forced defrost mode is set as:
[0033] When the data monitored by the second temperature sensor and the second humidity sensor are lower than the preset frosting temperature and humidity, and the data monitored by the first temperature sensor and the first humidity sensor reach the preset frosting temperature and humidity, the operation of the second refrigeration component is regulated to make the refrigeration part frost, and the first refrigeration component operates to cool and reduce the temperature; until the data monitored by the first temperature sensor and the first humidity sensor are lower than the preset frosting temperature and humidity.
[0034] A cold storage defrosting component provided in the present application includes: a first refrigeration component, including a refrigerant circulation loop, and an evaporator in the refrigerant circulation loop is arranged in the cold storage; a second refrigeration component, including a refrigeration part, and the refrigeration part is arranged in the cold storage; when the critical point of frost formation is reached in the cold storage, the refrigeration part performs refrigeration and frosting.
[0035] This application has the following beneficial effects:
[0036] By setting up dual refrigeration components in the cold storage and using the second refrigeration component to perform frosting operations, frost on the evaporator of the first refrigeration component can be avoided. The temperature of the cold storage is less affected and there will be no large temperature fluctuations. BRIEF DESCRIPTION OF THE DRAWINGS
[0037] In order to more clearly illustrate the implementation methods of the present application or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the implementation methods or the prior art descriptions. The drawings described below are merely exemplary, and for those of ordinary skill in the art, other implementation drawings can be derived from the provided drawings without creative work.
[0038] Figure 1 This is a schematic diagram of the structure of the cold storage air conditioning system of the embodiment of the present application;
[0039] Figure 2 This is a flow chart of the control method of the cold storage air conditioning system according to an embodiment of the present application.
[0040] The reference numerals are:
[0041] 1. Compressor; 2. Condenser; 3. Electronic expansion valve; 4. Evaporator; 5. Insulating ceramic sheet; 6. N-type semiconductor; 7. P-type semiconductor; 8. Metal conductor; 9. Insulating ceramic sheet; 10. Fan; 11. DC power supply; 12. First temperature sensor; 13. First humidity sensor 1; 14. Second temperature sensor; 15. Second humidity sensor; 16. Door; 17. Cold storage. DETAILED DESCRIPTION
[0042] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.
[0043] In the description of the present application, it should be understood 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, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.
[0044] 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.
[0045] 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. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.
[0046] See also Figure 1 to Figure 2 As shown, according to an embodiment of the present application, a cold storage defrosting component includes:
[0047] The first refrigeration component includes a refrigerant circulation loop, and the evaporator 4 in the refrigerant circulation loop is arranged in the cold storage 17;
[0048] The second refrigeration component includes a refrigeration unit, which is arranged in the cold storage 17; when the critical point of frosting in the cold storage 17 is reached, the refrigeration unit performs refrigeration and frosting.
[0049] The present application sets up dual refrigeration components in the cold storage 17, uses the second refrigeration component to perform frosting operation, avoids frost on the evaporator 4 of the first refrigeration component, and has the technical effect that the temperature of the cold storage 17 is less affected and does not fluctuate.
[0050] The present application utilizes the active defrosting method of the second refrigeration component. When the cold storage 17 reaches the frosting condition, the second refrigeration component independently operates the refrigeration and frosting to reduce the humidity in the cold storage 17. When the cold storage 17 does not meet the frosting conditions, it is defrosted uniformly.
[0051] This active defrosting method will not affect the air volume of the first refrigeration component because the second refrigeration component is separated from the first refrigeration component that mainly refrigerates the cold storage 17; and since the first refrigeration component of the cold storage 17 does not need to stop operating during defrosting, it has little impact on the temperature of the cold storage 17.
[0052] The refrigerant circulation loop of the first refrigeration component further includes a compressor 1, a condenser 2 and an electronic expansion valve 3. The compressor 1, the condenser 2, the electronic expansion valve 3 and the evaporator 4 are connected in sequence to form a refrigerant circulation loop. The evaporator 4 is in the cold storage 17 and serves as a refrigeration component that mainly reduces the temperature of the cold storage 17.
[0053] In some embodiments,
[0054] The second refrigeration component includes a semiconductor refrigeration device, which includes an N-type semiconductor 6, a P-type semiconductor 7 and a DC power supply 11. The N-type semiconductor 6 and the P-type semiconductor 7 are arranged side by side, and the first ends of the two are connected, and the second ends are respectively connected to the DC power supply 11 to form the semiconductor refrigeration device; the first end is set as a cold end, and the refrigeration part includes the cold end.
[0055] The second refrigeration component uses a semiconductor refrigeration device. The semiconductor refrigeration technology is a solid-state refrigeration method that does not require any refrigerant. It uses the temperature change generated when the current passes through the junction composed of two different materials (including N-type semiconductor 6 and P-type semiconductor 7) to achieve cooling or heating. Since the semiconductor refrigeration controls the temperature by adjusting the current size, it has a fast response speed and accurate temperature control.
[0056] When the critical point of frost formation is reached in the cold storage 17, the second refrigeration component operates in the refrigeration mode, so that the refrigeration part is quickly cooled down to frost, so that the temperature and humidity in the cold storage 17 are reduced, and frost formation on the evaporator 4 of the first refrigeration component is avoided, so that the temperature fluctuation of the cold storage 17 is smaller.
[0057] In some embodiments,
[0058] The semiconductor refrigeration device further includes a switching structure, and the switching structure is used to change the direction of the current from the DC power source 11 to the N-type semiconductor 6 or the P-type semiconductor 7 .
[0059] The semiconductor refrigeration device is improved by setting a reversing structure to change the direction of the current, thereby changing the function of the semiconductor, including changing the original refrigeration part into a heating part, so as to defrost the frost on the surface; since the semiconductor refrigeration device runs at a high speed, the frost will directly sublimate and there will be no dripping problem.
[0060] Sublimation is a physical change in which a substance changes directly from a solid state to a gaseous state. When the temperature of the frost is below the freezing point, if the humidity of the surrounding air is less than the saturated humidity of the air at the corresponding temperature, the frost will absorb a certain amount of heat from the surrounding environment and sublimate, changing from a solid state to gaseous water vapor.
[0061] In some embodiments,
[0062] There are multiple N-type semiconductors 6 and multiple P-type semiconductors 7 . One P-type semiconductor 7 is disposed between every two N-type semiconductors 6 , and one N-type semiconductor 6 is disposed between every two P-type semiconductors 7 .
[0063] In the specific setting of the semiconductor refrigeration device, N-type semiconductors 6 and P-type semiconductors 7 are alternately set, that is, a P-type semiconductor 7 is set between every two N-type semiconductors 6, and an N-type semiconductor 6 is set between every two P-type semiconductors 7. One end of an N-type semiconductor 6 is connected to one end of the adjacent P-type semiconductor 7 on one side, and the other end of the N-type semiconductor 6 is connected to one end of the adjacent P-type semiconductor 7 on the other side; similarly, one end of a P-type semiconductor 7 is connected to one end of the adjacent N-type semiconductor 6 on one side, and the other end of the P-type semiconductor 7 is connected to one end of the adjacent N-type semiconductor 6 on the other side; finally, the outermost N-type semiconductor 6 and P-type semiconductor 7 are connected to the two ends of the DC power supply 11 through the metal conductor 8 and the metal conductor 9 respectively.
[0064] A ceramic sheet is attached to the outside of the connection end of the N-type semiconductor 6 and the P-type semiconductor 7. The ceramic sheet has an insulating effect and can increase the heat exchange area with the air inside the cold storage 17 and increase the frosting surface.
[0065] According to another aspect of the present application, a cold storage air conditioning system is provided, comprising the cold storage defrosting assembly as described above.
[0066] In some embodiments,
[0067] The air conditioning system of the cold storage 17 also includes a temperature sensor and a humidity sensor. The temperature sensors include at least two: a first temperature sensor 12 and a second temperature sensor 14. The humidity sensors include at least two: a first humidity sensor and a second humidity sensor 15. The first temperature sensor 12 is used to monitor the temperature at the evaporator 4, and the first humidity sensor is used to monitor the humidity at the evaporator 4; the second temperature sensor is used to monitor the temperature at the door 16 of the cold storage 17, and the second humidity sensor 15 is used to monitor the humidity at the door 16 of the cold storage 17.
[0068] Corresponding temperature sensors and humidity sensors are arranged in the cold storage 17 to monitor the corresponding temperature and humidity so as to regulate the operation of the first refrigeration component and the second refrigeration component.
[0069] The evaporator 4 of the refrigerant circulation loop is arranged on the side wall adjacent to the door 16 of the cold storage 17 to prevent cold wind from blowing directly toward the door 16; and the second refrigeration component can be arranged on the side wall where the door 16 is located, especially near the door 16, because opening and closing the door is the key factor that causes the most obvious changes in temperature and humidity in the cold storage 17.
[0070] The first temperature sensor 12 and the first humidity sensor are specifically arranged near the evaporator 4 to monitor the temperature and humidity near the evaporator 4 in order to ensure normal refrigeration of the cold storage 17 and prevent frost on the evaporator 4; the second temperature sensor 14 and the second humidity sensor 15 are arranged near the door of the cold storage 17 to monitor the temperature and humidity at the door of the cold storage 17.
[0071] According to another aspect of the present application, a control method for the air conditioning system of the cold storage 17 as described above is provided, comprising:
[0072] Acquire monitoring data of the temperature sensor and the humidity sensor in the cold storage 17;
[0073] Compare the acquired temperature and humidity values with the preset frosting temperature and humidity in the cold storage 17;
[0074] According to the temperature and humidity comparison result, the operation states of the first refrigeration component and the second refrigeration component are controlled respectively.
[0075] Two refrigeration components are provided in the cold storage 17 of the present application, and the operating states of the two refrigeration components can be adjusted according to the real-time temperature and humidity obtained, including refrigeration mode, frosting mode, defrosting mode, etc., so as to reduce the temperature and humidity inside the cold storage 17, avoid the occurrence of invalid frosting, and ensure the stability of the internal temperature of the cold storage 17.
[0076] In the air conditioning system of the cold storage 17 of the present application, the evaporator 4 in the refrigerant circulation loop always cools down the cold storage 17, and the operation modes of the entire air conditioning system can be divided into normal operation mode, forced cooling mode, defrost mode, and forced defrost mode.
[0077] The normal operating mode is set as follows: the data monitored by the first temperature sensor 12 and the second temperature sensor 14, the first humidity sensor and the second humidity sensor 15 are all lower than the preset frosting temperature and humidity, and the first refrigeration component is regulated to operate refrigeration and cooling, and the second refrigeration component is stopped.
[0078] The forced cooling mode is set as follows: the data monitored by the first temperature sensor 12 and the second temperature sensor 14, the first humidity sensor and the second humidity sensor 15 are all higher than the preset frosting temperature and humidity, and the first refrigeration component is regulated to operate refrigeration and cooling, and the second refrigeration component is regulated to operate refrigeration and cooling;
[0079] The normal operation mode is entered when the data monitored by the first temperature sensor 12 and the second temperature sensor 14, the first humidity sensor and the second humidity sensor 15 are all lower than the preset frosting temperature and humidity.
[0080] The forced cooling mode is because the storage temperature is too high (such as when the cold storage 17 is just started), and the storage temperature needs to be quickly lowered, so the first refrigeration component and the second refrigeration component are all turned on for cooling.
[0081] The defrost mode is set as follows: when the data monitored by the second temperature sensor 14 and the second humidity sensor 15 reaches the preset frosting temperature and humidity, and the data monitored by the first temperature sensor 12 and the first humidity sensor is lower than the preset frosting temperature and humidity, the first refrigeration component is regulated to operate for refrigeration and cooling, and the second refrigeration component is regulated to operate for refrigeration and frosting;
[0082] When the data monitored by the second temperature sensor 14 and the second humidity sensor 15 are both lower than the preset frosting temperature and humidity, the second refrigeration component includes a semiconductor refrigeration device, and the current direction of the semiconductor refrigeration device is adjusted until defrosting of the refrigeration part of the second refrigeration component is completed.
[0083] The defrost mode is turned on when the system detects that the temperature and humidity on the side of the cold storage 17 door 16 rise to a preset value. The defrost process includes a semiconductor refrigeration device heating the bottom of the frost layer by changing the direction of the current to generate heat.
[0084] The forced defrost mode is set to: the data monitored by the second temperature sensor 14 and the second humidity sensor 15 are lower than the preset frosting temperature and humidity, while the data monitored by the first temperature sensor 12 and the first humidity sensor reach the preset frosting temperature and humidity, and the operation of the second refrigeration component is regulated to make the refrigeration part frost, and the first refrigeration component operates for refrigeration and cooling; until the data monitored by the first temperature sensor 12 and the first humidity sensor are lower than the preset frosting temperature and humidity.
[0085] When the temperature or humidity of the cold storage 17 rises and reaches the critical point of frosting, the air conditioning system of the present application uses a semiconductor refrigeration device to actively frost; when the temperature and humidity of the cold storage 17 decrease to the critical point of frosting, the bottom of the frost layer is heated by adjusting the direction of the current, thereby forming a temperature difference to make the frost layer fall off, thereby achieving the purpose of rapid defrosting. Since the refrigerant circulation loop is always in a cooling and cooling state, the temperature inside the cold storage 17 will not fluctuate greatly.
[0086] It is easy for those skilled in the art to understand that the above-mentioned implementation modes can be freely combined and superimposed without conflict.
[0087] The above is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application shall be included in the protection scope of the present application. The above is only a preferred implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present application, and these improvements and variations should also be regarded as the protection scope of the present application.
Claims
1. A cold storage defrosting component, characterized in that: include: A first refrigeration component includes a refrigerant circulation loop, wherein an evaporator (4) in the refrigerant circulation loop is arranged in the cold storage (17); The second refrigeration component comprises a refrigeration unit, which is arranged in the cold storage (17); when the critical point of frost formation is reached in the cold storage (17), the refrigeration unit performs refrigeration and frosting.
2. The cold storage defrosting assembly according to claim 1, characterized in that: The second refrigeration component comprises a semiconductor refrigeration device, which comprises an N-type semiconductor (6), a P-type semiconductor (7) and a DC power supply (11). The N-type semiconductor (6) and the P-type semiconductor (7) are arranged side by side, with their first ends connected to each other and their second ends respectively connected to the DC power supply (11), thereby forming the semiconductor refrigeration device; the first end is set as a cold end, and the refrigeration part comprises the cold end.
3. The cold storage defrosting assembly according to claim 2, characterized in that: The semiconductor refrigeration device also includes a commutation structure, which is used to change the direction of the current flowing from the DC power supply (11) to the N-type semiconductor (6) or the P-type semiconductor (7).
4. The cold storage defrosting assembly according to claim 2 or 3, characterized in that: A plurality of the N-type semiconductors (6) and the P-type semiconductors (7) are provided, one P-type semiconductor (7) is provided between every two N-type semiconductors (6), and one N-type semiconductor (6) is provided between every two P-type semiconductors (7).
5. A cold storage air conditioning system, characterized in that: It comprises a cold storage defrosting component as described in any one of claims 1 to 4.
6. The cold storage air conditioning system according to claim 5, characterized in that: The cold storage air conditioning system also includes a temperature sensor and a humidity sensor. The temperature sensors include at least two: a first temperature sensor (12) and a second temperature sensor (14). The humidity sensors include at least two: a first humidity sensor and a second humidity sensor (15). The first temperature sensor (12) is used to monitor the temperature at the evaporator (4), and the first humidity sensor is used to monitor the humidity at the evaporator (4). The second temperature sensor is used to monitor the temperature at the door (16) of the cold storage (17), and the second humidity sensor (15) is used to monitor the humidity at the door (16) of the cold storage (17).
7. A control method for a cold storage air conditioning system as claimed in claim 6, characterized in that: include: Acquiring monitoring data of the temperature sensor and the humidity sensor in the cold storage (17); Comparing the acquired temperature and humidity values with the preset frosting temperature and humidity in the cold storage (17); According to the temperature and humidity comparison result, the operation states of the first refrigeration component and the second refrigeration component are controlled respectively.
8. The control method according to claim 7, characterized in that: The control method includes a normal operating mode, and the normal operating mode is set as: The data monitored by the first temperature sensor (12) and the second temperature sensor (14), and the first humidity sensor and the second humidity sensor (15) are all lower than the preset frosting temperature and humidity, and the first refrigeration component is regulated to operate for refrigeration and cooling, while the second refrigeration component is stopped.
9. The control method according to claim 8, characterized in that: The control method further includes a forced cooling mode, wherein the forced cooling mode is set to: The data monitored by the first temperature sensor (12) and the second temperature sensor (14), and the first humidity sensor and the second humidity sensor (15) are all higher than the preset frosting temperature and humidity, and the first refrigeration component is regulated to operate refrigeration and cooling, and the second refrigeration component is regulated to operate refrigeration and cooling; When the data monitored by the first temperature sensor (12) and the second temperature sensor (14), and the first humidity sensor and the second humidity sensor (15) are all lower than the preset frosting temperature and humidity, the normal operation mode is entered.
10. The control method according to claim 7, characterized in that: The control method includes a defrost mode, and the defrost mode is set to: The data monitored by the second temperature sensor (14) and the second humidity sensor (15) reach the preset frosting temperature and humidity, while the data monitored by the first temperature sensor (12) and the first humidity sensor are lower than the preset frosting temperature and humidity, and the first refrigeration component is regulated to operate for refrigeration and cooling, and the second refrigeration component is regulated to operate for refrigeration and frosting; When the data monitored by the second temperature sensor (14) and the second humidity sensor (15) are both lower than the preset frosting temperature and humidity, the second refrigeration component includes a semiconductor refrigeration device, and the current direction of the semiconductor refrigeration device is adjusted until defrosting of the refrigeration part of the second refrigeration component is completed.
11. The control method according to claim 10, characterized in that: The control method further includes a forced defrost mode, and the forced defrost mode is set as: The data monitored by the second temperature sensor (14) and the second humidity sensor (15) are lower than the preset frosting temperature and humidity, while the data monitored by the first temperature sensor (12) and the first humidity sensor reach the preset frosting temperature and humidity. The operation of the second refrigeration component is regulated to cause the refrigeration part to frost, and the first refrigeration component is operated to cool down; until the data monitored by the first temperature sensor (12) and the first humidity sensor are lower than the preset frosting temperature and humidity.