Storage equipment

Abstract

The invention discloses storage equipment, and belongs to the technical field of refrigeration. The storage device comprises an inner container forming a refrigeration chamber; the refrigerating circuit comprises a compressor, and a condenser, a main throttling element and a main evaporator which are sequentially connected between an outlet and an inlet of the compressor through pipelines; the first pipeline is arranged in parallel with a pipeline consisting of the condenser and the main throttling element and is used for conveying heat discharged by the compressor to the main evaporator in a defrosting mode so as to heat and defrost the main evaporator; the refrigerating assembly is arranged in parallel with a second pipeline between the outlet of the main evaporator and the inlet of the compressor and is used for supplying cold to the refrigerating chamber in the defrosting mode; and the control device is electrically connected with the refrigeration assembly and used for adjusting the evaporation temperature of the refrigeration assembly in the defrosting mode. Cold can be supplied to the refrigerating chamber in the defrosting process of the main evaporator, the temperature of the refrigerating chamber is prevented from rising in the defrosting process, and the inner container is prevented from frosting while the refrigerating effect of the refrigerating assembly is guaranteed.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of refrigeration, and particularly relates to a storage equipment. BACKGROUND

[0002] The refrigerator mainly has two refrigeration modes of direct cooling and air cooling. The evaporator of the air-cooled refrigerator (the refrigerator adopting the air-cooled refrigeration mode) is prone to frosting during use, which increases the return air resistance and reduces the return air volume, thereby affecting the refrigeration effect of the refrigerator.

[0003] The related art mainly has two defrosting schemes of hot gas defrosting and heating wire defrosting. The hot gas defrosting scheme is to directly deliver the heat discharged by the compressor to the evaporator, and the heat is directly returned to the compressor after being released. The heating wire defrosting scheme is to defrost by heating the surface of the evaporator through the heating wire. Both of the two defrosting schemes will release heat during the defrosting process, which causes the temperature of the refrigeration chamber of the refrigerator to rise. SUMMARY

[0004] The application aims to at least solve one of the technical problems existing in the prior art. To this end, the application provides a storage equipment which can supply cold to the refrigeration chamber during the defrosting process of the main evaporator, avoids the temperature rise of the refrigeration chamber during the defrosting process, and ensures the refrigeration effect of the refrigeration assembly while avoiding frosting of the inner container.

[0005] In a first aspect, the application provides a storage equipment, comprising:

[0006] an inner container forming a refrigeration chamber;

[0007] a refrigeration circuit comprising a compressor, a condenser, a main throttling element and a main evaporator connected in sequence through pipelines between the outlet and the inlet of the compressor, and used for supplying cold to the refrigeration chamber in a refrigeration mode;

[0008] a first pipeline connected in parallel with the pipeline composed of the condenser and the main throttling element, and used for delivering the heat discharged by the compressor to the main evaporator to heat and defrost the main evaporator in a defrosting mode;

[0009] a refrigeration assembly connected in parallel with a second pipeline between the outlet of the main evaporator and the inlet of the compressor, and used for supplying cold to the refrigeration chamber in the defrosting mode;

[0010] a control device electrically connected with the refrigeration assembly, and used for adjusting the evaporation temperature of the refrigeration assembly in the defrosting mode.

[0011] According to the storage device, the compressor, the main evaporator and the refrigeration assembly constitute a defrosting circuit by arranging the first pipeline and the refrigeration assembly, so that the heat discharged by the compressor is transmitted to the main evaporator to heat and defrost the main evaporator in the defrosting mode, and the refrigeration assembly supplies cold to the refrigeration chamber to avoid temperature rise of the refrigeration chamber during the defrosting process. Meanwhile, the control device adjusts the evaporation temperature of the refrigeration assembly to ensure the refrigeration effect of the refrigeration assembly and avoid frost formation on the inner container.

[0012] According to an embodiment of the present application, the refrigeration assembly comprises a secondary throttling element and a secondary evaporator connected in sequence between the outlet of the main evaporator and the inlet of the compressor through the pipeline;

[0013] The control device is electrically connected with the secondary throttling element and is further configured to adjust the opening degree of the secondary throttling element to make the evaporation temperature of the secondary evaporator within a target temperature range in the defrosting mode.

[0014] According to an embodiment of the present application, the lower limit of the target temperature range is the dew point temperature of the refrigeration chamber, and the upper limit of the target temperature range is the temperature of the refrigeration chamber.

[0015] According to an embodiment of the present application, the storage device further comprises:

[0016] A first temperature sensor is arranged at the inlet of the secondary evaporator and is configured to detect the inlet temperature of the secondary evaporator.

[0017] The control device is electrically connected with the first temperature sensor and is further configured to adjust the opening degree of the secondary throttling element according to the inlet temperature of the secondary evaporator.

[0018] According to an embodiment of the present application, the control device is further configured to increase the opening degree of the secondary throttling element when it is determined that the inlet temperature of the secondary evaporator is less than or equal to the dew point temperature of the refrigeration chamber, and adjust the opening degree of the secondary throttling element according to the superheat of the secondary evaporator when it is determined that the inlet temperature of the secondary evaporator is greater than the dew point temperature of the refrigeration chamber.

[0019] According to an embodiment of the present application, the storage device further comprises:

[0020] A humidity sensor is arranged in the refrigeration chamber and is configured to detect the relative humidity of the refrigeration chamber.

[0021] A second temperature sensor is arranged in the refrigeration chamber and is configured to detect the temperature of the refrigeration chamber.

[0022] A third temperature sensor is arranged at the outlet of the secondary evaporator and is configured to detect the outlet temperature of the secondary evaporator.

[0023] The control device is electrically connected with the humidity sensor, the second temperature sensor and the third temperature sensor respectively, and is further configured to determine a dew point temperature of the refrigeration chamber according to the temperature and the relative humidity of the refrigeration chamber, and determine a superheat degree of the auxiliary evaporator according to the outlet temperature of the auxiliary evaporator.

[0024] According to an embodiment of the present application, the auxiliary evaporator is wound around the inner container.

[0025] According to an embodiment of the present application, the storage system further comprises:

[0026] A frost detection device is arranged at the main evaporator and configured to detect a frost thickness of the main evaporator.

[0027] The control device is electrically connected with the frost detection device, and is further configured to switch the refrigeration mode to a defrosting mode when the refrigeration mode is in the refrigeration mode and the frost thickness of the main evaporator meets a defrosting requirement.

[0028] According to an embodiment of the present application, the frost detection device comprises a plurality of laser instruments uniformly distributed on a windward surface of the main evaporator, and is configured to detect the frost thickness of the windward surface of the main evaporator.

[0029] The control device is electrically connected with each of the laser instruments, and is further configured to determine that the frost thickness of the main evaporator meets the defrosting requirement when at least a target number of laser instruments detect a frost thickness greater than a target thickness.

[0030] According to an embodiment of the present application, the control device is electrically connected with the compressor, and is further configured to, in the defrosting mode, and when the frost thickness of the main evaporator meets a defrosting end requirement, close the defrosting mode and the compressor, and start the compressor and the refrigeration mode when a refrigeration requirement is met.

[0031] According to an embodiment of the present application, the refrigeration requirement comprises at least one of the following: a target duration of the compressor is reached; and a target temperature of the main evaporator is exceeded.

[0032] According to an embodiment of the present application, the storage system further comprises:

[0033] An evaporative fan is configured to blow air refrigerated by the main evaporator to the refrigeration chamber.

[0034] The control device is electrically connected with the evaporative fan, and is further configured to control the evaporative fan to work in the refrigeration mode and to stop working in the defrosting mode.

[0035] According to an embodiment of the present application, the storage system further comprises:

[0036] a first valve disposed at an outlet of the compressor, configured to switch between a first valve position and a second valve position; wherein in the first valve position, the outlet of the compressor is in communication with a pipeline composed of the condenser and the main throttling element; and in the second valve position, the outlet of the compressor is in communication with the first pipeline;

[0037] a second valve disposed at an outlet of the main evaporator, configured to switch between a third valve position and a fourth valve position; wherein in the third valve position, the outlet of the main evaporator is in communication with the second pipeline; and in the fourth valve position, the outlet of the main evaporator is in communication with the refrigeration assembly;

[0038] the control device is electrically connected with the first valve and the second valve respectively, and is further configured to control the first valve to switch to the first valve position and control the second valve to switch to the third valve position in a refrigeration mode, and control the first valve to switch to the second valve position and control the second valve to switch to the fourth valve position in a defrosting mode.

[0039] The one or more technical solutions described above in the embodiments of the present application have at least one of the following technical effects:

[0040] By disposing the first pipeline and the refrigeration assembly, the compressor, the main evaporator and the refrigeration assembly form a defrosting circuit, so that in the defrosting mode, the heat discharged by the compressor is delivered to the main evaporator to heat and defrost the main evaporator, and at the same time, the refrigeration assembly supplies cold to the refrigeration chamber, avoiding the temperature rise of the refrigeration chamber during the defrosting process, and the control device adjusts the evaporation temperature of the refrigeration assembly to ensure the refrigeration effect of the refrigeration assembly while avoiding the frost formation of the inner container.

[0041] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0042] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the following description, including the appended drawings.

[0043] Figure 1 is a structural schematic diagram of a storage equipment provided by an embodiment of the present application;

[0044] Figure 2 is one of structural schematic diagrams of a refrigerant circulation system in a storage equipment provided by an embodiment of the present application;

[0045] Figure 3 is a refrigerant circulation schematic diagram of a refrigeration circuit in a storage equipment provided by an embodiment of the present application;

[0046] Figure 4 is a refrigerant circulation schematic diagram of a defrosting circuit in the storage equipment provided by the embodiment of the present application;

[0047] Figure 5 is a structural schematic diagram of a refrigerant circulation system in the storage equipment provided by the embodiment of the present application;

[0048] Figure 6 is a circuit schematic diagram of the storage equipment provided by the embodiment of the present application;

[0049] Figure 7 is a position relationship schematic diagram of a main evaporator and a laser instrument in the storage equipment provided by the embodiment of the present application;

[0050] Figure 8 is a structural schematic diagram of an auxiliary evaporator in the storage equipment provided by the embodiment of the present application.

[0051] Reference signs:

[0052] box 1, door body 2, inner container 11, refrigeration chamber 12, compressor compartment 13, compressor 3, condenser 4, main throttling element 5, main evaporator 6, first pipeline 21, second pipeline 22, refrigeration assembly 7, control device 8, first valve 41, second valve 42, auxiliary throttling element 71, auxiliary evaporator 72, first temperature sensor 31, second temperature sensor 32, third temperature sensor 33, humidity sensor 34, fourth temperature sensor 35, frost detection device 9, laser instrument 91, evaporative fan 61, filter 23. DETAILED DESCRIPTION

[0053] The embodiments of the present application are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation of the present application.

[0054] The storage equipment provided by the embodiment of the present application is described below with reference to the accompanying drawings.

[0055] Figure 1 is a structural schematic diagram of the storage equipment provided by the embodiment of the present application.

[0056] As shown in Figure 1 , the storage equipment provided by the embodiment of the present application includes a box 1 and a door body 2, and the door body 2 is hingedly installed on the box 1. The box 1 can include an outer shell, an inner container 11 and a thermal insulation layer. The inner container 11 is located in the outer shell, and the inner container 11 forms a refrigeration chamber 12. The thermal insulation layer is located between the outer shell and the inner container 11, and the thermal insulation layer can include foamed thermal insulation material.

[0057] The storage equipment also includes a refrigerant circulation system, which has both cooling and defrosting modes. Figure 2 As shown, the refrigerant circulation system includes a refrigeration circuit, which comprises a compressor 3, a condenser 4, a main throttling element 5, and a main evaporator 6. The condenser 4, main throttling element 5, and main evaporator 6 are sequentially connected via piping between the outlet and inlet of the compressor 3; specifically, the outlet of the compressor 3 is connected to the inlet of the condenser 4, the outlet of the condenser 4 is connected to the inlet of the main throttling element 5, the outlet of the main throttling element 5 is connected to the inlet of the main evaporator 6, and the outlet of the main evaporator 6 is connected to the inlet of the compressor 3. The refrigeration circuit is used to supply cooling to the refrigeration chamber 12 in refrigeration mode, thereby maintaining a low-temperature storage environment in the refrigeration chamber 12.

[0058] In cooling mode, low-temperature, low-pressure gaseous refrigerant enters compressor 3, which compresses it into high-temperature, high-pressure gaseous refrigerant. Condenser 4 condenses this high-temperature, high-pressure gaseous refrigerant into high-temperature, high-pressure liquid refrigerant, releasing heat into the surrounding environment during the condensation process. Main throttling element 5 expands the high-temperature, high-pressure liquid refrigerant into low-temperature, low-pressure liquid refrigerant. Main evaporator 6 absorbs heat and evaporates the low-temperature, low-pressure liquid refrigerant into low-temperature, low-pressure gaseous refrigerant to cool the cooling chamber 12. The low-temperature, low-pressure gaseous refrigerant then enters compressor 3 for the next cycle.

[0059] like Figure 2 As shown, the refrigerant circulation system also includes a first pipe 21 and a refrigeration assembly 7. The first pipe 21 is connected in parallel with the pipe consisting of the condenser 4 and the main throttling element 5, that is, the inlet of the first pipe 21 is connected to the outlet of the compressor 3, and the outlet of the first pipe 21 is connected to the inlet of the main evaporator 6. The first pipe 21 is used to transfer the heat discharged by the compressor 3 to the main evaporator 6 in defrost mode to heat and defrost the main evaporator 6.

[0060] It should be noted that the outlet of compressor 3 is connected to either the first pipe 21 or the pipe consisting of condenser 4 and main throttling element 5. In cooling mode, the outlet of compressor 3 is connected to the pipe consisting of condenser 4 and main throttling element 5, and the outlet of compressor 3 is disconnected from the first pipe 21; in defrosting mode, the outlet of compressor 3 is connected to the first pipe 21, and the outlet of compressor 3 is disconnected from the pipe consisting of condenser 4 and main throttling element 5.

[0061] In the process of the main evaporator 6 supplying cold to the refrigeration chamber 12 in the refrigeration mode, water vapor in the air is easy to condense on the surface of the main evaporator 6, thereby frosting on the surface of the main evaporator 6, affecting the refrigeration effect. Therefore, it is necessary to defrost the main evaporator 6. In the defrosting mode, the low-temperature and low-pressure gaseous refrigerant enters the compressor 3, and the compressor 3 compresses the low-temperature and low-pressure gaseous refrigerant into high-temperature and high-pressure gaseous refrigerant. The high-temperature and high-pressure gaseous refrigerant is transported to the main evaporator 6 through the first pipeline 21, so that the high-temperature and high-pressure gaseous refrigerant directly enters the main evaporator 6 and releases heat to heat and defrost the main evaporator 6. The defrosting water generated by the heating and defrosting of the main evaporator 6 can be discharged to the evaporating pan outside the box through the drain pipe.

[0062] The second pipeline 22 between the outlet of the main evaporator 6 and the inlet of the compressor 3 is connected in parallel with the refrigeration assembly 7, that is, the inlet of the refrigeration assembly 7 is connected with the outlet of the main evaporator 6, and the outlet of the refrigeration assembly 7 is connected with the inlet of the compressor 3. The refrigeration assembly 7 is used to supply cold to the refrigeration chamber 12 in the defrosting mode.

[0063] It should be noted that the outlet of the main evaporator 6 is selectively connected with the refrigeration assembly 7 or the second pipeline 22. In the refrigeration mode, the outlet of the main evaporator 6 is connected with the second pipeline 22, and the outlet of the main evaporator 6 is disconnected with the refrigeration assembly 7; in the defrosting mode, the outlet of the main evaporator 6 is connected with the refrigeration assembly 7, and the outlet of the main evaporator 6 is disconnected with the second pipeline 22.

[0064] In the defrosting mode, the high-temperature and high-pressure gaseous refrigerant discharged by the compressor 3 directly enters the main evaporator 6, the high-temperature and high-pressure gaseous refrigerant releases heat to heat and defrost the main evaporator 6, so that the high-temperature and high-pressure gaseous refrigerant becomes high-temperature and high-pressure liquid refrigerant. The refrigeration assembly 7 expands the high-temperature and high-pressure liquid refrigerant into low-temperature and low-pressure liquid refrigerant, absorbs heat to evaporate the low-temperature and low-pressure liquid refrigerant into low-temperature and low-pressure gaseous refrigerant, and supplies cold to the refrigeration chamber 12. The low-temperature and low-pressure gaseous refrigerant enters the compressor 3 to perform the next cycle.

[0065] In this embodiment, the compressor 3, the main evaporator 6 and the refrigeration assembly 7 constitute a defrosting circuit, so that in the defrosting mode, the high-temperature and high-pressure gaseous refrigerant discharged by the compressor 3 is directly transported to the main evaporator 6 to heat and defrost the main evaporator 6, and at the same time, the refrigeration assembly 7 supplies cold to the refrigeration chamber 12, so that synchronous refrigeration is realized in the defrosting process, and the temperature of the refrigeration chamber 12 is prevented from rising in the defrosting process.

[0066] In combination Figure 6 As shown in the figure, the storage device further comprises a control device 8, and the control device 8 is electrically connected with the refrigeration assembly 7. The control device 8 is used to adjust the evaporation temperature of the refrigeration assembly 7 in the defrosting mode.

[0067] The control device 8 adjusts the evaporation temperature of the refrigeration assembly 7 to a target temperature range, so as to ensure the refrigeration effect of the refrigeration assembly 7 and avoid frost formation on the inner container 11 caused by excessively low evaporation temperature of the refrigeration assembly 7.

[0068] In some embodiments, as shown in Figure 2 The storage device further comprises a first valve 41 and a second valve 42. The first valve 41 is arranged at the outlet of the compressor 3, and the second valve 42 is arranged at the outlet of the main evaporator 6. Figure 6 The control device 8 is electrically connected to the first valve 41 and the second valve 42, respectively.

[0069] The first valve 41 is configured to switch between a first valve position and a second valve position. In the first valve position, the outlet of the compressor 3 is connected to the pipeline formed by the condenser 4 and the main throttling element 5, and the outlet of the compressor 3 is disconnected from the first pipeline 21. In the second valve position, the outlet of the compressor 3 is connected to the first pipeline 21, and the outlet of the compressor 3 is disconnected from the pipeline formed by the condenser 4 and the main throttling element 5.

[0070] The second valve 42 is configured to switch between a third valve position and a fourth valve position. In the third valve position, the outlet of the main evaporator 6 is connected to the second pipeline 21, and the outlet of the main evaporator 6 is disconnected from the refrigeration assembly 7. In the fourth valve position, the outlet of the main evaporator 6 is connected to the refrigeration assembly 7, and the outlet of the main evaporator 6 is disconnected from the second pipeline 21.

[0071] The control device 8 is further configured to control the first valve 41 to switch to the first valve position and control the second valve 42 to switch to the third valve position in the refrigeration mode, and control the first valve 41 to switch to the second valve position and control the second valve 42 to switch to the fourth valve position in the defrosting mode.

[0072] In some embodiments, the first valve 41 and the second valve 42 are both three-way valves. The inlet of the first valve 41 is connected to the outlet of the compressor 3, the first outlet of the first valve 41 is connected to the inlet of the condenser 4, and the second outlet of the first valve 41 is connected to the inlet of the first pipeline 21. When the first valve 41 switches to the first valve position, the inlet of the first valve 41 is connected to the first outlet, so that the outlet of the compressor 3 is connected to the pipeline formed by the condenser 4 and the main throttling element 5. When the first valve 41 switches to the second valve position, the inlet of the first valve 41 is connected to the second outlet, so that the outlet of the compressor 3 is connected to the first pipeline 21.

[0073] The inlet of the second valve 42 is connected with the outlet of the main evaporator 6, the first outlet of the second valve 42 is connected with the inlet of the second pipeline 21, and the second outlet of the second valve 42 is connected with the inlet of the refrigeration assembly 7. When the second valve 42 is switched to the third valve position, the inlet of the second valve 42 is communicated with the first outlet, so that the outlet of the main evaporator 6 is communicated with the second pipeline 21; when the second valve 42 is switched to the fourth valve position, the inlet of the second valve 42 is communicated with the second outlet, so that the outlet of the main evaporator 6 is communicated with the refrigeration assembly 7.

[0074] In the refrigeration mode, as shown in FIG. 2, the control device 8 controls the first valve 41 to switch to the first valve position and controls the second valve 42 to switch to the third valve position, so that the compressor 3, the condenser 4, the main throttling element 5 and the main evaporator 6 form a refrigeration circuit to supply cold to the refrigeration chamber 12. Figure 3 In the defrosting mode, as shown in FIG. 3, the control device 8 controls the first valve 41 to switch to the second valve position and controls the second valve 42 to switch to the fourth valve position, so that the compressor 3, the main evaporator 6 and the refrigeration assembly 7 form a defrosting circuit to heat and defrost the main evaporator 6 and supply cold to the refrigeration chamber 12 through the refrigeration assembly 7. Figure 4

[0075] In some embodiments, as shown in FIG. 4, the refrigeration assembly 7 comprises a secondary throttling element 71 and a secondary evaporator 72. The secondary throttling element 71 and the secondary evaporator 72 are connected in sequence between the outlet of the main evaporator 6 and the inlet of the compressor 3 through pipelines, i.e., the inlet of the secondary throttling element 71 is connected with the outlet of the main evaporator 6, the outlet of the secondary throttling element 71 is connected with the inlet of the secondary evaporator 72, and the outlet of the secondary evaporator 72 is connected with the inlet of the compressor 3. Figure 2 In the defrosting mode, the compressor 3, the main evaporator 6, the secondary throttling element 71 and the secondary evaporator 72 form a defrosting circuit. The high-temperature and high-pressure gaseous refrigerant discharged by the compressor 3 directly enters the main evaporator 6, the high-temperature and high-pressure gaseous refrigerant releases heat to heat and defrost the main evaporator 6, so that the high-temperature and high-pressure gaseous refrigerant becomes high-temperature and high-pressure liquid refrigerant. The secondary throttling element 71 expands the high-temperature and high-pressure liquid refrigerant into low-temperature and low-pressure liquid refrigerant. The secondary evaporator 72 absorbs heat to evaporate the low-temperature and low-pressure liquid refrigerant into low-temperature and low-pressure gaseous refrigerant to supply cold to the refrigeration chamber 12. The low-temperature and low-pressure gaseous refrigerant enters the compressor 3 to perform the next cycle.

[0076] By adjusting the refrigerant flow through the secondary throttling element 71, the evaporation temperature of the secondary evaporator 72 can be adjusted, so that the temperature of the cold supply to the refrigeration chamber 12 can be adjusted.

[0077]

[0078] ​​In some embodiments, the auxiliary throttling element 71 can include at least one of a capillary tube and an electronic expansion valve. In the case where the auxiliary throttling element 71 includes a capillary tube, the refrigerant flow rate passing through the auxiliary throttling element 71 can be adjusted by adjusting the specification parameters of the capillary tube, such as the inner diameter and length of the capillary tube, and the like. In the case where the auxiliary throttling element 71 includes an electronic expansion valve, the refrigerant flow rate passing through the auxiliary throttling element 71 can be adjusted by adjusting the opening degree of the electronic expansion valve.

[0079] In combination Figure 5 and Figure 6 As shown in FIG. 7, in the case where the auxiliary throttling element 71 includes an electronic expansion valve, the control device 8 is electrically connected with the auxiliary throttling element 71. The control device 8 is further configured to adjust the opening degree of the auxiliary throttling element 71 in the defrosting mode, so that the evaporation temperature of the auxiliary evaporator 72 is within a target temperature range. The lower limit of the target temperature range is the dew point temperature of the refrigeration chamber 12, and the upper limit of the target temperature range is the temperature of the refrigeration chamber 12. For example, the target temperature range is -20°C-30°C.

[0080] The control device 8 in the embodiment adjusts the opening degree of the auxiliary throttling element 71 in the defrosting mode, so that the evaporation temperature of the auxiliary evaporator 72 is lower than the temperature of the refrigeration chamber 12 to supply cold to the refrigeration chamber 12, and the evaporation temperature of the auxiliary evaporator 72 is higher than the dew point temperature of the refrigeration chamber 12 to avoid the liner 11 from frosting.

[0081] In some embodiments, as shown in FIG. 8, the storage device can further include a first temperature sensor 31 arranged at the inlet of the auxiliary evaporator 72, and the control device 8 is further electrically connected with the first temperature sensor 31. Figure 5 The first temperature sensor 31 is configured to detect the inlet temperature of the auxiliary evaporator 72, and the control device 8 is further configured to adjust the opening degree of the auxiliary throttling element 71 according to the inlet temperature of the auxiliary evaporator 72. Figure 6 In the defrosting mode, the first temperature sensor 31 detects the inlet temperature of the auxiliary evaporator 72 in real time, and sends the real-time detected inlet temperature of the auxiliary evaporator 72 to the control device 8. The control device 8 adjusts the opening degree of the auxiliary throttling element 71 according to the inlet temperature of the auxiliary evaporator 72, so that the evaporation temperature of the auxiliary evaporator 72 is within a target temperature range, to ensure the refrigeration effect of the auxiliary evaporator 72 while avoiding the liner 11 from frosting.

[0082] In some embodiments, the control device 8 is further configured to increase the opening degree of the auxiliary throttling element 71 in the case where it is determined that the inlet temperature of the auxiliary evaporator 72 is less than or equal to the dew point temperature of the refrigeration chamber 12, and adjust the opening degree of the auxiliary throttling element 71 according to the superheat degree of the auxiliary evaporator 72 in the case where it is determined that the inlet temperature of the auxiliary evaporator 72 is greater than the dew point temperature of the refrigeration chamber 12.

[0083] In some embodiments, the control device 8 is further configured to increase the opening degree of the auxiliary throttling element 71 in the case where it is determined that the inlet temperature of the auxiliary evaporator 72 is less than or equal to the dew point temperature of the refrigeration chamber 12, and adjust the opening degree of the auxiliary throttling element 71 according to the superheat degree of the auxiliary evaporator 72 in the case where it is determined that the inlet temperature of the auxiliary evaporator 72 is greater than the dew point temperature of the refrigeration chamber 12.

[0084] In the defrosting mode, the control device 8 compares the inlet temperature T1 of the auxiliary evaporator 72 with the dew point temperature T 露 of the refrigeration chamber 12 in real time. If the inlet temperature T1 of the auxiliary evaporator 72 is less than or equal to the dew point temperature T 露 of the refrigeration chamber 12, i.e. T1≤T 露 , the opening degree of the auxiliary throttling element 71 is increased to increase the evaporation temperature of the auxiliary evaporator 72 to avoid frosting of the liner 11. If the inlet temperature T1 of the auxiliary evaporator 72 is greater than the dew point temperature T 露 of the refrigeration chamber 12, i.e. T1>T 露 , the opening degree of the auxiliary throttling element 71 is adjusted according to the superheat of the auxiliary evaporator 72. For example, when the superheat of the auxiliary evaporator 72 is too high, the opening degree of the auxiliary throttling element 71 is increased to increase the evaporation temperature of the auxiliary evaporator 72; when the superheat of the auxiliary evaporator 72 is too low, the opening degree of the auxiliary throttling element 71 is decreased to decrease the evaporation temperature of the auxiliary evaporator 72, so that the evaporation temperature of the auxiliary evaporator 72 is within the target temperature range.

[0085] In some embodiments, the storage device can further include a second temperature sensor 32 and a humidity sensor 34, both of which are arranged in the refrigeration chamber 12, as shown in Figure 6 The control device 8 is further electrically connected with the second temperature sensor 32 and the humidity sensor 34 respectively. The second temperature sensor 32 is used to detect the temperature of the refrigeration chamber 12, and the humidity sensor 34 is used to detect the relative humidity of the refrigeration chamber 12. The control device 8 is further used to determine the dew point temperature of the refrigeration chamber 12 according to the temperature and the relative humidity of the refrigeration chamber 12.

[0086] In the defrosting mode, the second temperature sensor 32 detects the temperature of the refrigeration chamber 12 in real time and sends the real-time detected temperature of the refrigeration chamber 12 to the control device 8. The humidity sensor 34 detects the relative humidity of the refrigeration chamber 12 in real time and sends the real-time detected relative humidity of the refrigeration chamber 12 to the control device 8. The control device 8 calculates the dew point temperature of the refrigeration chamber 12 according to the temperature and the relative humidity of the refrigeration chamber 12, and compares the inlet temperature of the auxiliary evaporator 72 with the dew point temperature of the refrigeration chamber 12 to adjust the opening degree of the auxiliary throttling element 71 according to the comparison result.

[0087] In some embodiments, as shown in Figure 5 , the storage device can further include a third temperature sensor 33 arranged at the outlet of the auxiliary evaporator 72, and the control device 8 is further electrically connected with the third temperature sensor 33. The third temperature sensor 33 is used to detect the outlet temperature of the auxiliary evaporator 72, and the control device 8 is further used to determine the superheat of the auxiliary evaporator 72 according to the outlet temperature of the auxiliary evaporator 72.

[0088] In the defrosting mode, and in the case that the inlet temperature of the auxiliary evaporator 72 is greater than the dew point temperature of the refrigeration chamber 12, the third temperature sensor 33 detects the outlet temperature of the auxiliary evaporator 72 in real time, and sends the detected outlet temperature of the auxiliary evaporator 72 to the control device 8. The control device 8 calculates the difference between the outlet temperature of the auxiliary evaporator 72 and the evaporation temperature of the auxiliary evaporator 72 to obtain the superheat degree of the auxiliary evaporator 72, so as to adjust the opening degree of the auxiliary throttling element 71 according to the superheat degree of the auxiliary evaporator 72.

[0089] In some embodiments, the storage device can further include a frost detection device 9 arranged at the main evaporator 6, and the control device 8 is further electrically connected with the frost detection device 9, as shown in Figure 6 The frost detection device 9 is used to detect the frost thickness of the main evaporator 6, and the control device 8 is further used to switch the refrigeration mode to the defrosting mode in the case that the frost thickness of the main evaporator 6 meets the defrosting requirement in the refrigeration mode.

[0090] The frost detection device 9 can detect the frost thickness of the surface of the main evaporator 6 in real time, and send the detected frost thickness to the control device 8. In the refrigeration mode, the control device 8 detects whether the frost thickness of the surface of the main evaporator 6 meets the defrosting requirement in real time, and switches the refrigeration mode to the defrosting mode if the frost thickness meets the defrosting requirement, so as to heat and defrost the main evaporator 6. The defrosting requirement can be set according to actual needs, for example, the defrosting requirement can include that the frost thickness of the surface of the main evaporator 6 is less than a target thickness.

[0091] The related art sets a fixed defrosting time to periodically and regularly heat and defrost the main evaporator, and this defrosting method cannot timely and effectively defrost the main evaporator. The embodiment detects the frost thickness of the surface of the main evaporator 6 in real time, so as to timely and effectively heat and defrost the main evaporator 6 when it is determined that the frost thickness of the surface of the main evaporator 6 meets the defrosting requirement.

[0092] In some embodiments, the frost detection device 9 can be arranged at the windward surface of the main evaporator 6 to detect the frost thickness of the windward surface of the main evaporator 6. Since the windward surface of the main evaporator 6 has a large air flow and is in contact with air flow more, the windward surface of the main evaporator 6 is prone to frost. The embodiment arranges the frost detection device 9 at the windward surface of the main evaporator 6 to improve the accuracy of frost detection.

[0093] In some embodiments, as shown in Figure 7 The frost detection device 9 includes a plurality of laser instruments 91, and the plurality of laser instruments 91 are uniformly distributed on the windward surface of the main evaporator 6. Each laser instrument 91 can be spaced apart from the windward surface of the main evaporator 6 by a certain distance (such as 2mm-10mm). As shown in Figure 6As shown, the control device 8 is also electrically connected with each laser instrument 91. Each laser instrument 91 is used to detect the frost thickness of the windward surface of the main evaporator 6, so that the frost detection device 9 can detect the frost thickness at different positions of the windward surface of the main evaporator 6, to improve the detection accuracy. The control device 8 is also used to determine that the frost thickness of the main evaporator 6 meets the defrosting requirement, in the case that at least the target number of laser instruments 91 detect that the frost thickness is greater than the target thickness.

[0094] Each laser instrument 91 detects the frost thickness of the windward surface of the main evaporator 6 in real time, and sends the real-time detected frost thickness to the control device 8. In the refrigeration mode, the control device 8 compares the frost thickness detected by each laser instrument 91 with the target thickness in real time, and determines that the frost thickness of the main evaporator 6 meets the defrosting requirement, in the case that at least the target number of laser instruments 91 detect that the frost thickness is greater than the target thickness. The control device 8 switches the refrigeration mode to the defrosting mode, to heat and defrost the main evaporator 6.

[0095] For example, the frost detection device 9 includes three laser instruments 91, and the target number is two. In the refrigeration mode, the control device 8 compares the frost thickness detected by each laser instrument 91 with the target thickness, and switches the refrigeration mode to the defrosting mode to heat and defrost the main evaporator 6, in the case that at least two laser instruments 91 detect that the frost thickness is greater than the target thickness.

[0096] In some embodiments, as shown, Figure 4 As shown, the control device 8 is also electrically connected with the compressor 3. The control device 8 is also used to close the defrosting mode and close the compressor 3, in the case that the frost thickness of the main evaporator 6 meets the defrosting end requirement in the defrosting mode. The control device 8 is also used to start the compressor 3 and start the refrigeration mode, in the case that the refrigeration requirement is met during the compressor 3 is closed.

[0097] In the defrosting mode, the frost detection device 9 detects the frost thickness of the surface of the main evaporator 6 in real time, and sends the real-time detected frost thickness to the control device 8. The control device 8 detects whether the frost thickness of the surface of the main evaporator 6 meets the defrosting end requirement in real time, to close the defrosting mode and close the refrigerant circulation system, i.e. to close the compressor 3 (the compressor 3 stops working), to continue to heat and defrost the main evaporator 6 by using the residual heat, in the case that the frost thickness of the main evaporator 6 meets the defrosting end requirement.

[0098] The defrost termination requirement can be set according to actual needs. For example, the defrost termination requirement includes the frost thickness on the main evaporator 6 being less than a preset thickness (e.g., 2mm). When the frost detection device 9 includes multiple lasers 91, each laser 91 detects the frost thickness on the main evaporator 6 in real time and sends the data to the control device 8. If the control device 8 determines that at least a target number of lasers 91 have detected a frost thickness less than the preset thickness, it determines that the frost thickness on the main evaporator 6 meets the defrost termination requirement, shuts down the defrost mode, and turns off the compressor 3.

[0099] During the shutdown of compressor 3, control device 8 monitors in real time whether the cooling requirements are met. If the cooling requirements are met, compressor 3 is started (compressor 3 resumes operation) and the cooling mode is activated to resume normal cooling of the cooling chamber 12.

[0100] The cooling requirements can be set according to actual needs. In some embodiments, the cooling requirements include at least one of the following: the compressor 3 is off for a longer period than a target duration; the main evaporator 6 is at a higher temperature than a target temperature.

[0101] When the cooling requirement includes the compressor 3's shutdown time reaching a target duration, timing can begin when the compressor 3 shuts down. When the controller 8 detects that the target duration has been reached, it starts the compressor 3 and activates the cooling mode, resuming normal cooling of the cooling chamber 12. The target duration can be set based on the time required for residual heat defrosting, ensuring that the frost on the surface of the main evaporator 6 is completely melted when the compressor 3's shutdown time reaches the target duration. For example, the target duration could be 10 minutes.

[0102] When the cooling requirement includes the temperature of the main evaporator 6 exceeding the target temperature, such as Figure 5 As shown, the storage device may also include a fourth temperature sensor 35, which is located at the main evaporator 6. The control device 8 is also electrically connected to the fourth temperature sensor 35, such as... Figure 6 As shown. The fourth temperature sensor 35 detects the temperature of the main evaporator 6 and sends it to the control device 8. The control device 8 compares the temperature of the main evaporator 6 with the target temperature. When the temperature of the main evaporator 6 exceeds the target temperature, the compressor 3 is started, and the cooling mode is activated to resume normal cooling of the cooling chamber 12. The target temperature can be set based on the temperature of the main evaporator 6 when the frost on its surface has just completely melted. For example, the target temperature is 0°C.

[0103] In some embodiments, such as Figure 2 As shown, the storage device also includes an evaporator fan 61, and the control device 8 is electrically connected to the evaporator fan 61, such as... Figure 6The evaporating fan 61 is used to blow the air cooled by the main evaporator 6 to the refrigeration chamber 12. The control device 8 is also used to control the evaporating fan 61 to work in the refrigeration mode and to stop working in the defrosting mode.

[0104] In the refrigeration mode, the control device 8 starts the evaporating fan 61, and the evaporating fan 61 works to blow the air cooled by the main evaporator 6 to the refrigeration chamber 12. In the defrosting mode, the control device 8 stops the evaporating fan 61, and the evaporating fan 61 stops working to avoid blowing the hot air heated by the main evaporator 6 to the refrigeration chamber 12 to cause the temperature of the refrigeration chamber 12 to rise.

[0105] In some embodiments, as shown in Figure 2 The refrigeration circuit further includes a filter 23 arranged at the outlet of the condenser 4. The filter 23 is used to filter the impurities in the refrigerant, improve the refrigeration efficiency, and reduce the risk of pipeline blockage.

[0106] In some embodiments, as shown in Figure 8 The auxiliary evaporator 72 is wound on the inner container 11. For example, the auxiliary evaporator 72 can include a light tube evaporator wound in a spiral on the inner container 11. In this embodiment, the auxiliary evaporator 72 is wound on the inner container 11 to provide circumferential cooling for the refrigeration chamber 12, thereby improving the temperature uniformity of the refrigeration chamber 12.

[0107] In some embodiments, as shown in Figure 1 The inner container 11 further forms a compressor compartment 13 in which the compressor 3 is located. The main evaporator 6 can be located in the refrigeration chamber 12, and the main evaporator 6 can be arranged close to the compressor compartment 13 and above the compressor compartment 13.

[0108] In some embodiments, the main evaporator 6 includes a finned evaporator.

[0109] In some embodiments, the main throttling element 5 includes at least one of an electronic expansion valve and a capillary tube.

[0110] It should be noted that the storage device in this embodiment can be understood as a general refrigeration storage device, including but not limited to a refrigerator, a freezer, a display cabinet, a beverage cabinet, a wine cabinet, a cold fresh cabinet, and a refrigeration vending machine, and the like. The refrigeration storage device has various structural forms and a wide range of applications.

[0111] According to the storage device of the present application, by arranging the first pipeline 21 and the refrigeration assembly 7, the compressor 3, the main evaporator 6 and the refrigeration assembly 7 form a defrosting circuit, so that in the defrosting mode, the heat discharged by the compressor 3 is delivered to the main evaporator 6 to heat and defrost the main evaporator 6, and at the same time, the refrigeration assembly 7 supplies cold to the refrigeration chamber, so that synchronous refrigeration during defrosting is realized, and the temperature of the refrigeration chamber 12 during defrosting is prevented from rising, and the control device 8 adjusts the evaporation temperature of the refrigeration assembly 7, so that the refrigeration effect of the refrigeration assembly 7 is ensured, and at the same time, the liner 11 is prevented from frosting.

[0112] The terms "first", "second", and the like in the description and claims of the present application are used for distinguishing between similar objects and not necessarily for describing a specific sequential or chronological order. It is to be understood that the use of these terms in the description and claims of the present application is merely for distinguishing between the similar objects and these terms are not necessarily used to describe a specific sequential or chronological order. It is to be understood that the data so used in the description and claims is meant to be inter-changeable and can be used in any order, unless otherwise specifically provided.

[0113] In the description of the present application, the meaning of "a plurality of" is two or more.

[0114] In the description of the present application, the description referring to the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" etc. means that the specific feature, structure, material or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. The illustrative description of the above terms in the present specification does not necessarily refer to the same embodiment or example. Moreover, the specific feature, structure, material or characteristic described can be combined in any appropriate manner in one or more embodiments or examples.

[0115] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made hereto without departing from the principles and spirit of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A storage device, characterized in that, include: The inner liner forms a cooling chamber; The refrigeration circuit includes a compressor, and a condenser, a main throttling element, and a main evaporator connected in sequence between the outlet and inlet of the compressor via pipelines, for supplying cooling to the refrigeration chamber in refrigeration mode; The first pipeline, which is connected in parallel with the pipeline consisting of the condenser and the main throttling element, is used to transfer the heat discharged by the compressor to the main evaporator in defrosting mode, so as to heat and defrost the main evaporator. A refrigeration assembly is provided in parallel with a second pipeline between the outlet of the main evaporator and the inlet of the compressor for supplying cooling to the refrigeration chamber in defrost mode; A control device, electrically connected to the refrigeration component, is used to adjust the evaporation temperature of the refrigeration component in defrost mode.

2. The storage device according to claim 1, characterized in that, The refrigeration assembly includes an auxiliary throttling element and an auxiliary evaporator connected in sequence between the outlet of the main evaporator and the inlet of the compressor via pipelines; The control device is electrically connected to the auxiliary throttling element and is also used to adjust the opening of the auxiliary throttling element in defrosting mode so that the evaporation temperature of the auxiliary evaporator is within the target temperature range.

3. The storage device according to claim 2, characterized in that, The lower limit of the target temperature range is the dew point temperature of the cooling chamber, and the upper limit of the target temperature range is the temperature of the cooling chamber.

4. The storage device according to claim 2, characterized in that, The storage device also includes: A first temperature sensor is located at the inlet of the auxiliary evaporator and is used to detect the inlet temperature of the auxiliary evaporator; The control device is electrically connected to the first temperature sensor and is also used to adjust the opening degree of the auxiliary throttling element according to the inlet temperature of the auxiliary evaporator.

5. The storage device according to claim 4, characterized in that, The control device is further configured to increase the opening degree of the auxiliary throttling element when the inlet temperature of the auxiliary evaporator is determined to be less than or equal to the dew point temperature of the refrigeration chamber; and to adjust the opening degree of the auxiliary throttling element according to the superheat of the auxiliary evaporator when the inlet temperature of the auxiliary evaporator is determined to be greater than the dew point temperature of the refrigeration chamber.

6. The storage device according to claim 5, characterized in that, The storage device also includes: A humidity sensor, located inside the cooling chamber, is used to detect the relative humidity of the cooling chamber; A second temperature sensor is installed inside the cooling chamber to detect the temperature of the cooling chamber. A third temperature sensor is located at the outlet of the auxiliary evaporator and is used to detect the outlet temperature of the auxiliary evaporator. The control device is electrically connected to the humidity sensor, the second temperature sensor, and the third temperature sensor, respectively, and is also used to determine the dew point temperature of the refrigeration chamber based on the temperature and relative humidity of the refrigeration chamber; and to determine the superheat of the auxiliary evaporator based on the outlet temperature of the auxiliary evaporator.

7. The storage device according to claim 1, characterized in that, The storage device also includes: A frost detection device is installed at the main evaporator to detect the frost thickness on the main evaporator; The control device is electrically connected to the frost detection device and is also used to switch the refrigeration mode to the defrost mode in the refrigeration mode and when it is determined that the frost thickness of the main evaporator meets the defrost requirements.

8. The storage device according to claim 7, characterized in that, The frost detection device includes multiple lasers evenly distributed on the windward side of the main evaporator, used to detect the frost thickness on the windward side of the main evaporator. The control device is electrically connected to each of the laser instruments and is also used to determine that the frost thickness of the main evaporator meets the defrosting requirements when at least a target number of laser instruments detect that the frost thickness is greater than the target thickness.

9. The storage device according to claim 7, characterized in that, The control device is electrically connected to the compressor and is also used to, in defrost mode, and when it is determined that the frost thickness of the main evaporator meets the defrost end requirement, to close the defrost mode and shut down the compressor; and when the refrigeration requirement is met, to start the compressor and start the refrigeration mode.

10. The storage device according to claim 9, characterized in that, The refrigeration requirements include at least one of the following: the compressor is shut off for a target duration; the temperature of the main evaporator exceeds the target temperature.

11. The storage device according to claim 1, characterized in that, The storage system also includes: An evaporator fan is used to blow the cooled air from the main evaporator into the cooling chamber; The control device is electrically connected to the evaporator fan and is also used to control the evaporator fan to work in cooling mode and to control the evaporator fan to stop working in defrosting mode.

12. The storage device according to any one of claims 1-11, characterized in that, The storage device also includes: A first valve is located at the outlet of the compressor and is used to switch between a first valve position and a second valve position; wherein, in the first valve position, the outlet of the compressor is connected to the pipeline composed of the condenser and the main throttling element; and in the second valve position, the outlet of the compressor is connected to the first pipeline. A second valve is located at the outlet of the main evaporator and is used to switch between a third valve position and a fourth valve position; wherein, in the third valve position, the outlet of the main evaporator is connected to the second pipeline; and in the fourth valve position, the outlet of the main evaporator is connected to the refrigeration assembly. The control device is electrically connected to the first valve and the second valve respectively, and is also used to control the first valve to switch to the first valve position and control the second valve to switch to the third valve position in the refrigeration mode; and to control the first valve to switch to the second valve position and control the second valve to switch to the fourth valve position in the defrosting mode.

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