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; a compressor; the refrigeration branch comprises 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, and the refrigeration branch is used for supplying cold to the refrigeration chamber in a refrigeration mode; the defrosting branch is connected with the refrigerating branch in parallel and comprises a heating pipe and a refrigerating assembly which are sequentially connected between an outlet and an inlet of the compressor through a pipeline, the heating pipe is arranged close to the main evaporator and used for heating and defrosting the main evaporator in the defrosting mode, and the refrigerating assembly is used for heating and defrosting the main evaporator in the defrosting mode. And cold is supplied to the refrigeration chamber. Cold can be supplied to the refrigeration chamber in the defrosting process of the main evaporator, and the temperature of the refrigeration chamber is prevented from rising in the defrosting process.

Description

TECHNICAL FIELD

[0001] The present 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 transmit 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 heat and defrost through the heating wire on the surface of the evaporator. 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 present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application provides a storage equipment which can supply cold to the refrigeration chamber during the defrosting process of the main evaporator, thereby avoiding the temperature rise of the refrigeration chamber during the defrosting process.

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

[0006] an inner container forming a refrigeration chamber;

[0007] a compressor;

[0008] a refrigeration branch comprising a condenser, a main throttling element and a main evaporator connected in sequence through pipelines between the outlet and the inlet of the compressor, for supplying cold to the refrigeration chamber in a refrigeration mode;

[0009] a defrosting branch connected in parallel with the refrigeration branch, comprising a heating pipe and a refrigeration assembly connected in sequence through pipelines between the outlet and the inlet of the compressor, the heating pipe being arranged close to the main evaporator, for heating and defrosting the main evaporator in a defrosting mode, and the refrigeration assembly being used for supplying cold to the refrigeration chamber in the defrosting mode.

[0010] According to the storage equipment of the present application, the heating pipe and the refrigeration assembly are arranged, so that the compressor, the heating pipe and the refrigeration assembly form a defrosting circuit, and the heating pipe is arranged close to the main evaporator, so as to deliver the heat discharged by the compressor to the heating pipe to heat and defrost the main evaporator in the defrosting mode, and the refrigeration assembly supplies cold to the refrigeration chamber, thereby avoiding the temperature rise of the refrigeration chamber during the defrosting process.

[0011] According to one 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 heating pipe and the inlet of the compressor through pipelines.

[0012] According to one embodiment of the present application, the storage device further comprises:

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

[0014] According to one 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 one embodiment of the present application, the secondary evaporator is wound on the inner container.

[0016] According to one embodiment of the present application, the secondary evaporator comprises a light pipe evaporator, and the light pipe evaporator is spirally wound on the inner container.

[0017] According to one embodiment of the present application, the secondary throttling element comprises at least one of an electronic expansion valve and a capillary tube.

[0018] According to one embodiment of the present application, the storage device further comprises:

[0019] A valve is arranged at the outlet of the compressor, and is configured to switch to a first valve position in the refrigeration mode and switch to a second valve position in the defrosting mode; wherein in the first valve position, the compressor is in conduction with the refrigeration branch; and in the second valve position, the compressor is in conduction with the defrosting branch.

[0020] According to one embodiment of the present application, the storage system further comprises:

[0021] An evaporative fan is configured to work in the refrigeration mode to blow the air refrigerated by the main evaporator to the refrigeration chamber, and stop working in the defrosting mode.

[0022] According to one embodiment of the present application, the heating pipe is spirally wound on the main evaporator.

[0023] The one or more technical solutions in the embodiments of the present application at least have one of the following technical effects:

[0024] The heating pipe and the refrigeration assembly are arranged, so that the compressor, the heating pipe and the refrigeration assembly form a defrosting circuit, and the heating pipe is arranged close to the main evaporator, so that in the defrosting mode, the heat discharged by the compressor is delivered to the heating pipe to heat and defrost the main evaporator, and the refrigeration assembly supplies cold to the refrigeration chamber to avoid temperature rise of the refrigeration chamber during defrosting.

[0025] The opening degree of the auxiliary throttling element is adjusted, so that the evaporation temperature of the auxiliary evaporator is located in the target temperature range, so as to ensure that the auxiliary evaporator supplies cold to the refrigeration chamber while avoiding frosting of the inner container.

[0026] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0027] 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.

[0028] Figure 1 is a structural schematic diagram of a storage equipment provided by an embodiment of the present application;

[0029] Figure 2 is a structural schematic diagram of a refrigerant circulation system in the storage equipment provided by an embodiment of the present application;

[0030] Figure 3 is a refrigerant circulation schematic diagram of a refrigeration circuit in the storage equipment provided by an embodiment of the present application;

[0031] Figure 4 is a refrigerant circulation schematic diagram of a defrosting circuit in the storage equipment provided by an embodiment of the present application;

[0032] Figure 5 is a structural schematic diagram of a refrigerant circulation system in the storage equipment provided by an embodiment of the present application;

[0033] Figure 6 is a circuit schematic diagram of the storage equipment provided by an embodiment of the present application;

[0034] Figure 7 is a positional relationship schematic diagram of a main evaporator and a laser instrument in the storage equipment provided by an embodiment of the present application;

[0035] Figure 8 is a structural schematic diagram of an auxiliary evaporator in the storage equipment provided by an embodiment of the present application;

[0036] Figure 9 is a positional relationship schematic diagram of a main evaporator and a heating pipe in the storage equipment provided by an embodiment of the present application.

[0037] REFERENCE NUMERALS:

[0038] 10. Cabinet body, 20. Inner liner, 11. Refrigeration chamber, 12. Compressor compartment, 13. Compressor, 3. Condenser, 4. Main throttling element, 5. Main evaporator, 6. Heating tube, 2. Refrigeration assembly, 7. Control device, 8. Valve, 41. 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. Evaporator fan, 61. Filter, 23. Detailed Implementation

[0039] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0040] The storage device provided in the embodiments of this application is described below with reference to the accompanying drawings.

[0041] Figure 1 This is a schematic diagram of the structure of the storage device provided in an embodiment of this application.

[0042] like Figure 1 As shown, the storage device provided in this embodiment includes a housing 10 and a door 20, with the door 20 being installable and closable on the housing 10. The housing 10 may include an outer shell, an inner liner 11, and an insulation layer. The inner liner 11 is located inside the outer shell, forming a cooling chamber 12. The insulation layer is located between the outer shell and the inner liner 11, and the insulation layer may include a foamed thermal insulation material.

[0043] 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 compressor 3, a refrigeration branch, and a defrost branch. Either the refrigeration branch or the defrost branch can be selectively connected. When compressor 3 is connected to the refrigeration branch, compressor 3 and the refrigeration branch constitute a refrigeration circuit; when compressor 3 is connected to the defrost branch, compressor 3 and the defrost branch constitute a defrost circuit.

[0044] Combination Figure 2As shown, the refrigeration branch circuit comprises the condenser 4, the main throttling element 5 and the main evaporator 6. The condenser 4, the main throttling element 5 and the main evaporator 6 are connected in sequence by pipelines between the outlet and the inlet of the compressor 3, i.e. the outlet of the compressor 3 is connected with the inlet of the condenser 4, the outlet of the condenser 4 is connected with the inlet of the main throttling element 5, the outlet of the main throttling element 5 is connected with the inlet of the main evaporator 6, and the outlet of the main evaporator 6 is connected with the inlet of the compressor 3. The refrigeration branch circuit is used to supply cold to the refrigeration chamber 12 in the refrigeration mode, so as to maintain a low-temperature storage environment in the refrigeration chamber 12.

[0045] In the refrigeration 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 condenser 4 condenses the high-temperature and high-pressure gaseous refrigerant into high-temperature and high-pressure liquid refrigerant, and heat is released to the surrounding environment during the condensation process. The main throttling element 5 expands the high-temperature and high-pressure liquid refrigerant into low-temperature and low-pressure liquid refrigerant. The main evaporator 6 absorbs heat to evaporate the low-temperature and low-pressure liquid refrigerant into low-temperature and low-pressure gaseous refrigerant, so as to supply cold to the refrigeration chamber 12. The low-temperature and low-pressure gaseous refrigerant enters the compressor 3 for the next cycle.

[0046] In combination Figure 2 As shown, the defrosting branch circuit comprises the heating pipe 2 and the refrigeration assembly 7. The heating pipe 2 and the refrigeration assembly 7 are connected in sequence by pipelines between the outlet and the inlet of the compressor 3, i.e. the outlet of the compressor 3 is connected with the inlet of the heating pipe 2, the outlet of the heating pipe 2 is connected with the inlet of the refrigeration assembly 7, and the outlet of the refrigeration assembly 7 is connected with the inlet of the compressor 3. The defrosting branch circuit is used to heat and defrost the main evaporator 6 and supply cold to the refrigeration chamber 12 in the defrosting mode.

[0047] The heating pipe 2 is arranged close to the main evaporator 6 and is used to heat and defrost the main evaporator 6 in the defrosting mode. The refrigeration assembly 7 is used to supply cold to the refrigeration chamber 12 in the defrosting mode.

[0048] In the refrigeration mode, water vapor in the air is easy to condense on the surface of the main evaporator 6, thereby frosting the surface of the main evaporator 6 and affecting the refrigeration effect. Therefore, the main evaporator 6 needs to be defrosted. 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 enters the heating pipe 2 arranged close to the main evaporator 6 to release heat and heat and defrost the main evaporator 6, and the high-temperature and high-pressure gaseous refrigerant becomes high-temperature and high-pressure liquid refrigerant. The defrosting water generated by heating and defrosting of the main evaporator 6 can be discharged to the evaporating pan outside the box through the drain pipe. The refrigeration assembly 7 expands the high-temperature and high-pressure liquid refrigerant into low-temperature and low-pressure liquid refrigerant, absorbs heat, evaporates 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.

[0049] In the defrosting mode, the high-temperature and high-pressure gaseous refrigerant discharged by the compressor 3 is transported to the heating pipe 2 arranged close 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 as to realize synchronous refrigeration during the defrosting process and avoid the temperature rise of the refrigeration chamber 12 during the defrosting process.

[0050] In some embodiments, in combination with Figure 6 As shown, the storage device further comprises a control device 8 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.

[0051] The control device 8 adjusts the evaporation temperature of the refrigeration assembly 7 to a target temperature range, so as to supply cold to the refrigeration chamber 12 by the refrigeration assembly 7, ensure the refrigeration effect of the refrigeration assembly 7, and avoid frosting of the inner container 11 caused by too low evaporation temperature of the refrigeration assembly 7.

[0052] In some embodiments, as Figure 2 As shown, the storage device further comprises a valve 41 arranged at the outlet of the compressor 3. The valve 41 is used to switch to a first valve position in the refrigeration mode and switch to a second valve position in the defrosting mode; wherein in the first valve position, the compressor 3 is in conduction with the refrigeration branch; and in the second valve position, the compressor 3 is in conduction with the defrosting branch.

[0053] Valve 41 can switch between a first valve position and a second valve position. In cooling mode, valve 41 switches to the first valve position, connecting compressor 3 to the cooling branch, i.e., compressor 3, condenser 4, main throttling element 5, and main evaporator 6 are connected, while compressor 3 is disconnected from the defrost branch. In defrost mode, valve 41 switches to the second valve position, connecting compressor 3 to the defrost branch, i.e., compressor 3, heating element 2, and cooling assembly 7 are connected, while compressor 3 is disconnected from the cooling branch.

[0054] In some embodiments, valve 41 is a three-way valve. The inlet of valve 41 is connected to the outlet of compressor 3, the first outlet of valve 41 is connected to the inlet of condenser 4, and the second outlet of valve 41 is connected to the inlet of heating element 2. When valve 41 is switched to the first position, the inlet and first outlet of valve 41 are connected, thereby connecting compressor 3 to the refrigeration branch; when valve 41 is switched to the second position, the inlet and second outlet of valve 41 are connected, thereby connecting compressor 3 to the defrosting branch.

[0055] In some embodiments, such as Figure 6 As shown, the control device 8 is also electrically connected to the valve 41. The control device 8 is also used to control the valve 41 to switch to the first valve position in the cooling mode and to switch the valve 41 to the second valve position in the defrosting mode.

[0056] In cooling mode, such as Figure 3 As shown, control device 8 controls valve 41 to switch to the first valve position, so that compressor 3, condenser 4, main throttling element 5 and main evaporator 6 form a refrigeration circuit to supply cooling to refrigeration chamber 12. In defrost mode, as... Figure 4 As shown, the control device 8 controls the valve 41 to switch to the second valve position, so that the compressor 3, the heating tube 2 and the refrigeration component 7 form a defrosting circuit, so as to heat and defrost the main evaporator 6 through the heating tube 2, and at the same time supply cooling to the refrigeration chamber 12 through the refrigeration component 7.

[0057] In some embodiments, the refrigeration assembly 7 includes an auxiliary throttling element 71 and an auxiliary evaporator 72 connected in sequence between the outlet of the heating tube 2 and the inlet of the compressor 3 via pipelines. Specifically, the inlet of the auxiliary throttling element 71 is connected to the outlet of the heating tube 2, the outlet of the auxiliary throttling element 71 is connected to the inlet of the auxiliary evaporator 72, and the outlet of the auxiliary evaporator 72 is connected to the inlet of the compressor 3.

[0058] In the defrosting mode, the compressor 3, the heating pipe 2, the auxiliary throttling element 71 and the auxiliary evaporator 72 constitute a defrosting circuit. The high-temperature and high-pressure gaseous refrigerant discharged by the compressor 3 enters the heating pipe 2 arranged close to 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 auxiliary throttling element 71 expands the high-temperature and high-pressure liquid refrigerant into low-temperature and low-pressure liquid refrigerant. The auxiliary 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.

[0059] 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. 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.

[0060] In combination Figure 5 and Figure 6 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℃-30℃.

[0061] 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 frosting of the inner container 11.

[0062] In some embodiments, as shown in Figure 5 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 electrically connected with the first temperature sensor 31, as shown in Figure 6 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.

[0063] In the defrosting mode, the first temperature sensor 31 detects the inlet temperature of the auxiliary evaporator 72 in real time and sends the 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 the target temperature range, thereby ensuring the refrigeration effect of the auxiliary evaporator 72 and avoiding the liner 11 from frosting.

[0064] In some embodiments, the control device 8 is further configured to increase the opening degree of the auxiliary throttling element 71 when 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 of the auxiliary evaporator 72 when it is determined that the inlet temperature of the auxiliary evaporator 72 is greater than the dew point temperature of the refrigeration chamber 12.

[0065] 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. When 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, thereby avoiding the liner 11 from frosting. When 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, thereby making the evaporation temperature of the auxiliary evaporator 72 within the target temperature range.

[0066] 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 FIG. 1, and the control device 8 is further electrically connected with the second temperature sensor 32 and the humidity sensor 34, respectively. Figure 6 The second temperature sensor 32 is configured to detect the temperature of the refrigeration chamber 12, the humidity sensor 34 is configured to detect the relative humidity of the refrigeration chamber 12, and the control device 8 is further configured to determine the dew point temperature of the refrigeration chamber 12 according to the temperature and the relative humidity of the refrigeration chamber 12.

[0067] In the defrosting mode, the second temperature sensor 32 detects the temperature of the refrigeration chamber 12 in real time and sends the detected temperature of the refrigeration chamber 12 in real time to the control device 8. The humidity sensor 34 detects the relative humidity of the refrigeration chamber 12 in real time and sends the detected relative humidity of the refrigeration chamber 12 in real time 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.

[0068] In some embodiments, as shown in FIG. 1, 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 configured to detect the outlet temperature of the auxiliary evaporator 72, and the control device 8 is further configured to determine the superheat degree of the auxiliary evaporator 72 according to the outlet temperature of the auxiliary evaporator 72. Figure 5

[0069] 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 in real time 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, and adjusts the opening degree of the auxiliary throttling element 71 according to the superheat degree of the auxiliary evaporator 72.

[0070] 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 FIG. 1. The frost detection device 9 is configured to detect the frost thickness of the main evaporator 6, and the control device 8 is further configured 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. Figure 6

[0071] 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 in real time 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 to heat and defrost the main evaporator 6 if the frost thickness meets the defrosting requirement. 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.

[0072] ​​The related art sets a fixed defrosting time to periodically and regularly heat the main evaporator for defrosting, which cannot effectively defrost the main evaporator in time. The embodiment detects the frost thickness on the surface of the main evaporator 6 in real time, and effectively defrosts the main evaporator 6 in time when the frost thickness on the surface of the main evaporator 6 meets the defrosting requirement.

[0073] In some embodiments, the frost detection device 9 can be arranged on the windward surface of the main evaporator 6 to detect the frost thickness on 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 the air flow more, the windward surface of the main evaporator 6 is prone to frost. The embodiment arranges the frost detection device 9 on the windward surface of the main evaporator 6 to improve the accuracy of frost detection.

[0074] 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 2-10 mm). As shown in Figure 6 The control device 8 is also electrically connected with each laser instrument 91. Each laser instrument 91 is used to detect the frost thickness on the windward surface of the main evaporator 6, so that the frost detection device 9 can detect the frost thickness at different positions on 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 when at least a target number of laser instruments 91 detect that the frost thickness is greater than a target thickness.

[0075] Each laser instrument 91 detects the frost thickness on 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 if at least a 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.

[0076] 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 the three laser instruments 91 with the target thickness respectively, and switches the refrigeration mode to the defrosting mode to heat and defrost the main evaporator 6 if at least two laser instruments 91 detect that the frost thickness is greater than the target thickness.

[0077] In some embodiments, as shown in Figure 4As shown, the control device 8 is also electrically connected with the compressor 3. The control device 8 is also configured to, in the defrosting mode, and in a case where it is determined that the frost thickness of the main evaporator 6 meets the defrosting end requirement, turn off the defrosting mode, and turn off the compressor 3; during the compressor 3 is turned off, and in a case where the refrigeration requirement is met, start the compressor 3, and start the refrigeration mode.

[0078] 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 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, so as to, in a case where it is determined that the frost thickness of the main evaporator 6 meets the defrosting end requirement, turn off the defrosting mode, and turn off the refrigerant circulation system, i.e., turn off the compressor 3 (the compressor 3 stops working), so as to continue heating and defrosting the main evaporator 6 by using the residual heat.

[0079] In some embodiments, the defrosting end requirement includes that the frost thickness of the main evaporator 6 is less than a preset thickness (e.g., 2 mm). In a case where the frost detection device 9 includes a plurality of laser instruments 91, each laser instrument 91 detects the frost thickness of the main evaporator 6 in real time and sends the detected frost thickness to the control device 8. The control device 8 determines that the frost thickness of the main evaporator 6 meets the defrosting end requirement in a case where at least a target number of laser instruments 91 detect that the frost thickness is less than the preset thickness, turns off the defrosting mode, and turns off the compressor 3.

[0080] During the compressor 3 is turned off, the control device 8 detects whether the refrigeration requirement is met in real time, and in a case where the refrigeration requirement is met, starts the compressor 3 (the compressor 3 resumes working), and starts the refrigeration mode, so as to resume normal cooling supply to the refrigeration chamber 12.

[0081] In some embodiments, the refrigeration requirement includes at least one of the following: the turned-off time length of the compressor 3 exceeds a target time length; the temperature of the main evaporator 6 exceeds a target temperature.

[0082] In a case where the refrigeration requirement includes that the turned-off time length of the compressor 3 reaches the target time length, the controller 8 can start the compressor 3 and start the refrigeration mode to resume normal cooling supply to the refrigeration chamber 12 when it is detected that the turned-off time length of the compressor 3 reaches the target time length. The target time length can be set according to the time length of the residual heat defrosting, so that the frost on the surface of the main evaporator 6 is completely melted when the turned-off time length of the compressor 3 reaches the target time length. For example, the target time length is 10 min.

[0083] In a case where the refrigeration requirement includes that the temperature of the main evaporator 6 exceeds the target temperature, the controller 8 can start the compressor 3 and start the refrigeration mode to resume normal cooling supply to the refrigeration chamber 12 when it is detected that the temperature of the main evaporator 6 exceeds the target temperature. Figure 5As 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.

[0084] In some embodiments, such as Figure 2 As shown, the storage device also includes an evaporator fan 61, which operates in cooling mode to blow the air cooled by the main evaporator 6 to the cooling chamber 12; and stops operating in defrost mode.

[0085] In some embodiments, the control device 8 is electrically connected to the evaporator fan 61, such as... Figure 6 As shown. The control device 8 is also used to control the operation of the evaporator fan 61 in cooling mode and to control the evaporator fan 61 to stop operating in defrosting mode.

[0086] In cooling mode, control device 8 starts evaporator fan 61, which blows the cooled air supplied by main evaporator 6 towards cooling chamber 12. In defrost mode, control device 8 shuts off evaporator fan 61, preventing it from blowing hot air from main evaporator 6 during defrost towards cooling chamber 12 and causing the temperature of cooling chamber 12 to rise.

[0087] In some embodiments, such as Figure 2 As shown, the refrigeration branch also includes a filter 23, which is located at the outlet of the condenser 4. The filter 23 is used to filter impurities in the refrigerant, improve refrigeration efficiency, and reduce the risk of pipe blockage.

[0088] In some embodiments, such as Figure 8 As shown, the auxiliary evaporator 72 is wound around the inner liner 11. For example, the auxiliary evaporator 72 may include a bare tube evaporator, which is spirally wound around the inner liner 11. In this embodiment, the auxiliary evaporator 72 is wound around the inner liner 11 to provide circumferential cooling to the cooling chamber 12, thereby improving the temperature uniformity of the cooling chamber 12.

[0089] In some embodiments, such as Figure 1 As shown, the inner liner 11 also forms a compressor compartment 13, and the compressor 3 is located inside the compressor compartment 13. The main evaporator 6 can be located inside the refrigeration chamber 12, the main evaporator 6 can be set close to the compressor compartment 13, and the main evaporator 6 can be located above the compressor compartment 13.

[0090] In some embodiments, the main evaporator 6 comprises a finned evaporator.

[0091] In some embodiments, the heating pipe 2 is located at least at the windward side of the main evaporator 6. Since the windward side of the evaporator 6 has a large air flow and is in contact with the air flow more, once blocked, it has a greater impact on the flow smoothness of the air flow. Therefore, the defrosting demand of the windward side of the evaporator 6 is greater, and the heating pipe 2 is located at the windward side of the main evaporator 6, which can improve the defrosting efficiency of the main evaporator 6.

[0092] In some embodiments, as shown in FIG. 2, the heating pipe 2 is wound around the main evaporator 6. For example, the heating pipe is wound around the main evaporator 6 in a serpentine shape to increase the contact area between the heating pipe 2 and the main evaporator 6 and improve the defrosting efficiency. Figure 9

[0093] In some embodiments, the region where the heating pipe 2 is wound around the main evaporator 6 includes the windward side of the main evaporator 6. In some embodiments, the spacing of the heating pipe 2 wound around the windward side of the main evaporator 6 can be smaller than the spacing of the heating pipe 2 wound around other regions of the main evaporator 6.

[0094] In some embodiments, the main throttling element 5 comprises at least one of an electronic expansion valve and a capillary tube.

[0095] It should be noted that the storage device in the present 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, etc. The refrigeration storage device has various structural forms and a wide range of applications.

[0096] According to the storage device of the present application, by arranging the heating pipe 2 and the refrigeration assembly 7, the compressor 3, the heating pipe 2 and the refrigeration assembly 7 form a defrosting circuit, and the heating pipe 2 is arranged close to the main evaporator 6, so that in the defrosting mode, the heat discharged by the compressor 3 is delivered to the heating pipe 2 to heat and defrost the main evaporator 6, and at the same time, the refrigeration assembly 7 supplies cold to the refrigeration chamber to avoid the temperature rise of the refrigeration chamber during the defrosting process. Moreover, by adjusting the evaporation temperature of the refrigeration assembly 7, the refrigeration effect of the refrigeration assembly 7 is ensured, and at the same time, the inner container 11 is prevented from frosting.

[0097] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of a kind and are not limited in number, for example, the first object can be one or more.

[0098] ​In the description of the application, the meaning of "a plurality" is two or more.

[0099] In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary expressions of the above terms do not necessarily refer to the same embodiment or example. Also, the specific features, structures, materials or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

[0100] Although the embodiments of the present application have been shown and described, it will be understood by those having ordinary skill in the art that various changes, modifications, alternatives, and variations can be made to the embodiments without departing from the principles and spirit of the 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; compressor; The refrigeration branch includes 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 defrosting branch, which is connected in parallel with the refrigeration branch, includes a heating pipe and a refrigeration assembly connected in sequence between the outlet and inlet of the compressor via pipelines. The heating pipe is located close to the main evaporator and is used to heat and defrost the main evaporator in defrosting mode. The refrigeration assembly is used to supply cooling to the refrigeration chamber in defrosting mode.

2. The storage device according to claim 1, characterized in that, The refrigeration assembly includes an auxiliary throttling element and an auxiliary evaporator, which are connected in sequence via pipes between the outlet of the heating tube and the inlet of the compressor.

3. The storage device according to claim 2, characterized in that, The storage device also includes: A control device, electrically connected to the auxiliary throttling element, is 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.

4. The storage device according to claim 3, 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.

5. The storage device according to claim 2, characterized in that, The auxiliary evaporator is wound around the inner liner.

6. The storage device according to claim 5, characterized in that, The auxiliary evaporator includes a bare tube evaporator, which is spirally wound around the inner liner.

7. The storage device according to claim 2, characterized in that, The auxiliary throttling element includes at least one of an electronic expansion valve and a capillary tube.

8. The storage device according to claim 1, characterized in that, The storage device also includes: A valve is located at the outlet of the compressor and is used to switch to a first valve position in refrigeration mode and a second valve position in defrosting mode; wherein, in the first valve position, the compressor is connected to the refrigeration branch; and in the second valve position, the compressor is connected to the defrosting branch.

9. The storage device according to claim 1, characterized in that, The storage system also includes: An evaporator fan is used to operate in cooling mode to blow the air cooled by the main evaporator into the cooling chamber; it stops operating in defrost mode.

10. The storage device according to any one of claims 1-9, characterized in that, The heating element is wound in a serpentine shape around the main evaporator.

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