Refrigeration equipment and defrosting control method thereof

Abstract

The invention provides refrigeration equipment and a defrosting control method thereof.The refrigeration equipment comprises a machine shell, a heat exchanger, a defrosting device and a water pan, the defrosting device is located below the heat exchanger and comprises a lifting control mechanism, a lifting frame, a rotation control mechanism, defrosting rotating blades and a distance sensor, and the lifting control mechanism controls the lifting frame to move; the rotating control mechanism is arranged on the lifting frame and controls the defrosting rotating blade to rotate, a middle hub of the defrosting rotating blade is connected with the first electric heating module, the distance sensor is arranged on the lifting frame and detects the vertical distance between a surface frost layer of the heat exchange pipe and the defrosting rotating blade, and the defrosting rotating blade and the water pan both comprise heat conduction materials. The water pan is located below the defrosting device and connected with the second electric heating module. The refrigeration equipment can automatically, stably, reliably and quickly perform effective defrosting operation on the heat exchanger, the defrosting effect and efficiency of the heat exchanger are improved, the defrosting operation cannot cause any damage influence on the heat exchanger, and the refrigeration performance of the heat exchanger is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of refrigeration equipment, in particular to a refrigeration equipment and a defrosting control method of the refrigeration equipment. BACKGROUND

[0002] With the progress of modern technology and the continuous improvement of people's quality of life, refrigeration equipment, as a kind of indispensable electrical equipment in modern intelligent electrical equipment integration, is used to maintain a low-temperature environment through a refrigeration system, and is a professional device for fresh-keeping storage of food, medicine and other items, which is widely used in human production and life, including household refrigerators, commercial refrigerators and industrial refrigeration equipment.

[0003] During the long-term use of the refrigeration equipment, the water vapor in the air will enter the interior of the refrigeration equipment during the frequent opening of the sealed door of the refrigeration equipment for taking and placing food, thereby condensing ice and frost on the surface of the heat exchanger in the refrigeration equipment. The ice and frost attached to the surface of the heat exchanger will affect the refrigeration effect and efficiency of the heat exchanger, and increase the operating energy consumption of the refrigeration equipment.

[0004] In order to defrost the heat exchanger in the refrigeration equipment, one way is to set a defrosting wheel and control the defrosting wheel to move relative to the heat exchange pipe, thereby removing the frost layer on the wall of the heat exchange pipe.

[0005] However, during the process of water vapor in the air entering the interior of the refrigeration equipment, ice and frost will also condense on the surface of the defrosting wheel, which is easy to freeze the defrosting wheel, resulting in that the defrosting wheel cannot work normally, affecting the reliability of the defrosting work. In addition, once the frost layer accumulated on the surface of the heat exchange pipe is too thick, the defrosting wheel removes the thick frost layer by using a hard impact and scraping method, which is easy to cause deformation damage to the heat exchange pipe, affecting the refrigeration performance of the heat exchange pipe. SUMMARY

[0006] In order to achieve the first purpose of the present application, the present application provides a refrigeration equipment which can automatically, stably, reliably and quickly perform effective defrosting operation on the heat exchanger, thereby improving the defrosting effect and efficiency of the heat exchanger, and the defrosting operation will not cause any damage to the heat exchanger, thereby ensuring the refrigeration performance of the heat exchanger.

[0007] In order to achieve the second purpose of the present application, the present application provides a defrosting control method of the above refrigeration equipment.

[0008] In order to achieve the first object of the present application, the present application provides a refrigeration equipment, comprising a cabinet, a heat exchanger, a defrosting device and a water collecting tray, the heat exchanger, the defrosting device and the water collecting tray are located in the cabinet, and the heat exchange pipes of the heat exchanger are arranged horizontally, the defrosting device is located below the heat exchanger in the vertical direction, and the defrosting device comprises a lifting control mechanism, a lifting frame, a rotating control mechanism, a defrosting rotating blade and a distance sensor, the lifting control mechanism controls the lifting frame to move in the vertical direction, the rotating control mechanism is arranged on the lifting frame and controls the rotation of the defrosting rotating blade, the middle hub of the defrosting rotating blade is connected with a first electric heating module, and the distance sensor is arranged on the lifting frame and detects the vertical distance between the frost layer on the surface of the heat exchange pipes and the defrosting rotating blade, the defrosting rotating blade and the water collecting tray both comprise a heat-conducting material, the water collecting tray is located below the defrosting device and is provided with a water collecting opening and a water discharging opening, the upper end of the water collecting tray is open to the water collecting opening, and the water collecting tray is connected with a second electric heating module.

[0009] Further, a first heat-conducting sheet is arranged on each blade of the defrosting rotating blade, the first heat-conducting sheet is a heat-conducting metal sheet, the first heat-conducting sheet is connected with the first electric heating module, or the first heat-conducting sheet is not connected with the first electric heating module.

[0010] Further, the first heat-conducting sheet is arranged in a prismatic grid shape.

[0011] Further, the first heat-conducting sheet is arranged on the back surface of the blade away from the heat exchanger, or the first heat-conducting sheet is arranged in the interior of the blade.

[0012] Further, the first electric heating module is a first electric heating sheet, and the first electric heating sheet is arranged on the middle hub.

[0013] Further, the number of the defrosting rotating blades is at least two, and the plurality of defrosting rotating blades are arranged in rotation support on the lifting frame to cover the heat exchanger in the vertical direction, and / or the number of the distance sensors is at least two, and the plurality of distance sensors are arranged on the lifting frame in the horizontal direction.

[0014] Further, the water collecting tray is provided with a heat-conducting slide rail, the inner side surface of the heat-conducting slide rail is provided with a first sliding groove extending in the vertical direction, the lifting frame is provided with a first sliding block which is slidably embedded in the first sliding groove in the vertical direction, or the inner side surface of the heat-conducting slide rail is provided with a second sliding block, the lifting frame is provided with a second sliding groove extending in the vertical direction, and the second sliding groove is slidably sleeved on the second sliding block in the vertical direction.

[0015] Further, the heat-conducting slide rail is provided with a second heat-conducting sheet, the second heat-conducting sheet is a heat-conducting metal sheet, the second heat-conducting sheet is connected with the second electric heating module, or the second heat-conducting sheet is not connected with the second electric heating module.

[0016] A further proposed solution is to arrange the second heat-conducting plate in a diamond-shaped grid pattern.

[0017] A further option is to place the second heat-conducting plate on the outer surface of the heat-conducting slide rail, with the outer surface of the heat-conducting slide rail facing the inner surface of the heat-conducting slide rail; or, the second heat-conducting plate is placed inside the heat-conducting slide rail.

[0018] A further embodiment is that the water receiving tray includes multiple open slots and multiple closed slots, which are arranged alternately and connected in the horizontal direction. The upper ends of the multiple open slots are open to form water inlets. Each open slot and each closed slot is connected to a drain outlet. The walls of the closed slots adjacent to the open slots are perforated to allow communication between adjacent closed slots and open slots.

[0019] A further option is that the second electric heating module includes multiple second heating element groups, with each second heating element group being adapted to an opening slot.

[0020] A further option is that a second heating element group is located on the bottom end face of an open slot; and / or, each second heating element group is arranged in a diamond-shaped grid pattern.

[0021] To achieve the second objective of this invention, this invention provides a defrosting control method for a refrigeration device, wherein the refrigeration device is as described above, and the defrosting control method includes: acquiring the cumulative duration for which the refrigeration device is in the open state. When the cumulative duration Equal to or greater than the preset duration At that time, the refrigeration equipment is controlled to stop refrigeration operation, and the vertical distance between the frost layer on the surface of the heat exchange tube and the defrost rotor is obtained. When it is determined that the condition is met When the conditions are met, the first and second electric heating modules are activated, and the lifting control mechanism controls the lifting frame to move vertically upwards towards the heat exchange tubes, while the rotation control mechanism controls the defrosting blades to rotate; when it is determined that the conditions are not met... When the time is right, the first and second electric heating modules are turned on first. After the first electric heating module has run for a preset time, the control mechanism is rotated to control the defrost vanes to rotate until the desired time is met. Then the lifting control mechanism controls the lifting frame to move vertically upwards towards the heat exchange tube.

[0022] A further solution is to install a flow sensor at the drain outlet of the refrigeration equipment. The flow sensor is used to detect the drainage flow rate per unit time at the drain outlet. Defrosting control methods for refrigeration equipment also include: obtaining the drainage flow rate of the drain outlet. When the drainage flow rate If the flow rate is less than the preset flow rate, the heating power of the second electric heating module will be increased.

[0023] During the refrigeration operation of the refrigeration equipment of this invention, the cumulative duration of the refrigeration equipment being in the open state is obtained. Because of the temperature difference between the inside and outside of the refrigeration equipment, water vapor in the air will enter the interior of the refrigeration equipment. This means that frost of a certain thickness will condense on the surface of the heat exchanger tubes inside the refrigeration equipment. If the temperature difference between the inside and outside of the refrigeration equipment is small and the air humidity is low, the frost layer on the surface of the heat exchanger tubes will be thin. If the temperature difference between the inside and outside of the refrigeration equipment is large and the air humidity is high, the frost layer on the surface of the heat exchanger tubes will be thick. Therefore, the cumulative time when the refrigeration equipment of this invention is in the open state... Equal to or greater than the preset duration If the frost layer condensing on the surface of the heat exchanger tubes indicates that the heat exchanger's cooling performance will be affected, the refrigeration equipment will be controlled to stop cooling operation. This means the heat exchanger in the refrigeration equipment will stop cooling operation, and the vertical distance between the frost layer on the heat exchanger tube surface and the defrosting impeller will be detected by a distance sensor installed on the lifting frame. .

[0024] When the distance sensor detects the vertical distance between the frost layer on the surface of the heat exchange tube and the defrosting impeller... When the value is greater than 0, it indicates that the defrosting blades are not frozen by frost, thus controlling the first and second electric heating modules to turn on. At the same time, the lifting control mechanism controls the lifting frame to move vertically upwards towards the heat exchange tube, and the rotation control mechanism controls the defrosting blades to rotate. That is, the lifting control mechanism controls the lifting frame to move the defrosting blades closer to the heat exchange tube in the vertical direction. Since the defrosting blades contain thermally conductive material and the central hub of the defrosting blades is connected to the first electric heating module, the heat from the first electric heating module is transferred to the defrosting blades. With the rotation control mechanism controlling the defrosting blades to rotate, the heat on the defrosting blades is dispersed to quickly melt the frost layer on the surface of the heat exchange tube over a large area. The adhesion of the melting frost layer is reduced, so the rotating blades can flexibly and quickly scrape off the frost layer on the surface of the heat exchange tube, avoiding the deformation and damage to the heat exchange tube that can easily be caused by hard scraping to remove the frost layer, thus ensuring the cooling performance of the heat exchanger. As the lifting control mechanism controls the lifting frame to move the rotating defrost vane in the vertical direction closer to the heat exchange tube and to the preset safe position, the preset safe position is to avoid collision between the defrost vane and the heat exchange tube, which would cause damage to both. This allows the defrost vane to remain in the preset safe position for a certain period of time, and the heat emitted by the defrost vane to completely remove the frost layer on the surface of the heat exchange tube.

[0025] When the distance sensor detects the vertical distance between the frost layer on the surface of the heat exchange tube and the defrosting impeller... When the vertical distance is less than or equal to 0, it indicates that the frost layer of the defrosting rotary blade is frozen, and the first electric heating module is controlled to be turned on first. Since the defrosting rotary blade contains heat-conducting material, and the middle hub of the defrosting rotary blade is connected with the first electric heating module, the heat of the first electric heating module is transmitted to the defrosting rotary blade and diffused, thereby melting the frozen frost layer of the defrosting rotary blade. After the first electric heating module operates for a preset time, the frozen frost layer of the defrosting rotary blade is softened and dissolved, and the defrosting rotary blade is rotated by the rotation control mechanism until the distance sensor detects that the vertical distance between the frost layer on the surface of the heat exchange pipe and the defrosting rotary blade is greater than 0 When the vertical distance is greater than 0, it indicates that the defrosting rotary blade is not frozen by the frost layer, and then the lifting control mechanism controls the lifting frame to move the defrosting rotary blade in a rotating state upward in the vertical direction to approach the heat exchange pipe, so as to quickly remove the frost layer on the surface of the heat exchange pipe.

[0026] In the process of quickly removing the frost layer by the defrosting device, the removed frost layer or frost water falls into the water collecting tray below, and the second electric heating module is controlled to be turned on synchronously. Since the water collecting tray contains heat-conducting material, and the water collecting tray is connected with the second electric heating module, the frost layer falling into the water collecting tray is further melted to form frost water, so that the frost water is smoothly and quickly discharged from the drain port of the water collecting tray, and the melting speed of the frost layer falling into the water collecting tray is prevented from being too slow to affect the discharge speed of the frost water.

[0027] Therefore, the defrosting device of the refrigeration equipment detects the vertical distance between the frost layer on the surface of the heat exchange pipe and the defrosting rotary blade by the distance sensor , and controls the defrosting operation of the heat exchanger based on the vertical distance between the frost layer on the surface of the heat exchange pipe and the defrosting rotary blade , so as to reliably and effectively defrost the heat exchanger. The defrosting rotary blade contains heat-conducting material, and the heat is diffused when the defrosting rotary blade rotates, so that the frost layer on the surface of the heat exchange pipe can be quickly and widely melted, the adhesion of the melting frost layer is reduced, the frost layer on the surface of the heat exchange pipe can be quickly and flexibly scraped by the rotating defrosting rotary blade, and the heat exchange pipe is prevented from being deformed and damaged by hard scraping, so as to ensure the refrigeration performance of the heat exchanger. Therefore, the refrigeration equipment can automatically, stably, reliably and quickly effectively defrost the heat exchanger, so as to improve the defrosting effect and efficiency of the heat exchanger, and the defrosting operation will not cause any damage to the heat exchanger, thereby ensuring the refrigeration performance of the heat exchanger. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a front view of an embodiment of the refrigeration equipment.

[0029] Figure 2 is Figure 1 is an enlarged view at A-A.

[0030] Figure 3 is the top view of the heat exchanger, defrosting device and water pan cooperation in the embodiment of the refrigerator of the present application.

[0031] Figure 4 is Figure 3 is the sectional view at B-B.

[0032] Figure 5 is the front view of the heat exchanger, defrosting device and water pan cooperation in the embodiment of the refrigerator of the present application.

[0033] Figure 6 is the structural view of the heat exchanger, defrosting device and water pan cooperation in the embodiment of the refrigerator of the present application.

[0034] Figure 7 is the first perspective exploded view of the heat exchanger, defrosting device and water pan cooperation in the embodiment of the refrigerator of the present application.

[0035] Figure 8 is the second perspective exploded view of the heat exchanger, defrosting device and water pan cooperation in the embodiment of the refrigerator of the present application.

[0036] Figure 9 is the third perspective exploded view of the heat exchanger, defrosting device and water pan cooperation in the embodiment of the refrigerator of the present application.

[0037] Figure 10 is Figure 9 is the enlarged view at C.

[0038] Figure 11 is the top view of the defrosting device in the embodiment of the refrigerator of the present application.

[0039] Figure 12 is Figure 11 is the sectional view at D-D.

[0040] Figure 13 is the first perspective structural view of the defrosting device in the embodiment of the refrigerator of the present application.

[0041] Figure 14 is the second perspective structural view of the defrosting device in the embodiment of the refrigerator of the present application.

[0042] Figure 15 is the structural view of the defrosting rotating blade in the embodiment of the refrigerator of the present application.

[0043] Figure 16 is the first perspective structural view of the water pan in the embodiment of the refrigerator of the present application.

[0044] Figure 17 is the second perspective structural view of the water pan in the embodiment of the refrigerator of the present application.

[0045] Figure 18 is Figure 17 An enlarged view of E.

[0046] Figure 19 is a top view of a water pan in an embodiment of the refrigerator of the present invention.

[0047] Figure 20 is Figure 19 A sectional view taken along line F-F.

[0048] Figure 21 is Figure 20 An enlarged view of G.

[0049] The present invention will now be described further with reference to the drawings and embodiments. DETAILED DESCRIPTION

[0050] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is only meant to be illustrative and not limiting of the present invention, its applications or uses. The present invention can be carried out in many different ways with many different embodiments and is not limited to the embodiments described here. These embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. It should be noted that the relative arrangement of components and steps, the components of materials, numerical expressions, and numerical values set forth in these embodiments are to be interpreted as merely exemplary and not as a limitation unless otherwise specifically stated.

[0051] The terms "first", "second", and similar terms in the present invention do not denote any order, quantity, or importance, but are used to distinguish different parts. The terms "include", "comprise", and similar terms mean that the elements before the term encompass the elements listed after the term, and do not exclude the possibility of also encompassing other elements. The terms "upper", "lower", "left", "right", and the like are used only to indicate relative positional relationships, and when the absolute positions of the described objects are changed, the relative positional relationships can also be changed accordingly.

[0052] In the present invention, when it is described that a particular device is located between a first device and a second device, there can be an intervening device between the particular device and the first device or the second device, or there can be no intervening device. When it is described that a particular device is connected to another device, the particular device can be directly connected to the other device without an intervening device, or can not be directly connected to the other device with an intervening device.

[0053] All terms used in the description herein, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs unless specifically defined otherwise. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

[0054] Techniques, methods, and apparatus known to the relevant art can not be discussed in detail, but where appropriate, the techniques, methods, and apparatus should be considered as part of the specification.

[0055] Refrigeration device embodiment: Referring to Figures 1 to 21 The refrigeration device 10 of the present embodiment comprises a cabinet 11 and a heat exchanger 12, the heat exchanger 12 is located in the cabinet 11, and the heat exchange pipes 121 of the heat exchanger 12 are arranged horizontally. Among them, the refrigeration chamber 112 is arranged in the cabinet 11, and the cabinet 11 is provided with a door panel 111 corresponding to the refrigeration chamber 112 to open or seal the refrigeration chamber 112.

[0056] And the refrigeration device 10 of the present embodiment also comprises a defrosting device 13 and a water collecting tray 14 located in the cabinet 11, the defrosting device 13 is located below the heat exchanger 12 in the vertical direction, and the defrosting device 13 comprises a lifting control mechanism, a lifting frame 131, a rotating control mechanism, a defrosting rotating blade 132 and a distance sensor 134, the lifting control mechanism controls the lifting frame 131 to move in the vertical direction, the rotating control mechanism is arranged on the lifting frame 131 and controls the defrosting rotating blade 132 to rotate, the middle hub 1321 of the defrosting rotating blade 132 is connected with the first electric heating module, and the distance sensor 134 is arranged on the lifting frame 131 and detects the vertical distance between the frost layer on the surface of the heat exchange pipe 121 and the defrosting rotating blade 132 .

[0057] And the defrosting rotating blade 132 and the water collecting tray 14 of the present embodiment both contain heat-conducting materials, the water collecting tray 14 is located below the defrosting device 13 and is provided with a water collecting port and a drain port 142, the upper end of the water collecting tray 14 is open to the water collecting port, and the water collecting tray 14 is connected with the second electric heating module.

[0058] In the refrigeration operation process of the refrigeration device 10 of the present embodiment, the cumulative time length of the refrigeration device 10 in the open state is obtained This refers to the cumulative time spent by the user frequently opening the door 111 of the refrigerator 10 to retrieve food from the refrigerator compartment 112. For example, if the user opens the door 111 of the refrigerator 10 once for 10 seconds, the second time for 20 seconds, the third time for 15 seconds, the fourth time for 30 seconds, the fifth time for 1 minute, the sixth time for 40 seconds, and so on, the total duration of the refrigerator 10 being in the open state. It is the sum of 10s, 20s, 15s, 30s, 1min, 40s...

[0059] Because of the temperature difference between the inside and outside of the refrigeration equipment 10, water vapor in the air will enter the interior of the refrigeration equipment 10. This means that frost of a certain thickness will condense on the surface of the heat exchange tubes 121 of the heat exchanger 12 inside the refrigeration equipment 10. If the temperature difference between the inside and outside of the refrigeration equipment 10 is small and the air humidity is low, the frost layer condensed on the surface of the heat exchange tubes 121 of the heat exchanger 12 will be thin. If the temperature difference between the inside and outside of the refrigeration equipment 10 is large and the air humidity is high, the frost layer condensed on the surface of the heat exchange tubes 121 of the heat exchanger 12 will be thick. Therefore, the cumulative time when the refrigeration equipment 10 is in the open state in this embodiment is... Equal to or greater than the preset duration If the frost layer condensed on the surface of the heat exchanger tube 121 affects the refrigeration performance of the heat exchanger 12, then the refrigeration equipment 10 will be controlled to stop refrigeration operation, that is, the heat exchanger 12 of the refrigeration equipment 10 will stop refrigeration operation. The vertical distance between the frost layer on the surface of the heat exchanger tube 121 and the defrost vane 132 will be detected by the distance sensor 134 installed on the lifting frame 131. .

[0060] When the distance sensor 134 detects the vertical distance between the frost layer on the surface of the heat exchange tube 121 and the defrosting rotor 132 When the value is greater than 0, it indicates that the defrost rotor 132 is not frozen by frost, thus controlling the first and second electric heating modules to turn on. Simultaneously, the lifting control mechanism controls the lifting frame 131 to move vertically upwards towards the heat exchange tube 121, and the rotation control mechanism controls the defrost rotor 132 to rotate. That is, the lifting control mechanism controls the lifting frame 131 to move the defrost rotor 132 vertically towards the heat exchange tube 121. Since the defrost rotor 132 contains thermally conductive material, and the central hub 1321 of the defrost rotor 132 is connected to the first electric heating module... The heat is connected to the heating module, so that the heat from the first electric heating module is transferred to the defrost vane 132. The defrost vane 132 is rotated by the rotation control mechanism to spread the heat on the defrost vane 132 to melt the frost layer on the surface of the heat exchange tube 121 over a large area. The adhesion of the frost layer during melting is reduced, so the blades of the rotating defrost vane 132 can flexibly and quickly scrape off the frost layer on the surface of the heat exchange tube 121, avoiding the deformation and damage to the heat exchange tube 121 that is easily caused by hard scraping to remove the frost layer, thereby ensuring the cooling performance of the heat exchanger 12. As the lifting control mechanism controls the lifting frame 131 to move the rotating defrost vane 132 in the vertical direction closer to the heat exchange tube 121 and to a preset safe position, the preset safe position is to avoid collision between the defrost vane 132 and the heat exchange tube 121, which would cause collision damage to both. This allows the defrost vane 132 to remain in the preset safe position for a certain period of time, and the heat emitted by the defrost vane 132 completely removes the frost layer on the surface of the heat exchange tube 121.

[0061] When the distance sensor 134 detects the vertical distance between the frost layer on the surface of the heat exchange tube 121 and the defrosting rotor 132 When the value is less than or equal to 0, it indicates that the defrosting rotor 132 is frozen by frost. The first electric heating module is then activated. Since the defrosting rotor 132 contains heat-conducting material and its central hub 1321 is connected to the first electric heating module, heat from the first electric heating module is transferred to and dissipated from the defrosting rotor 132, melting the frost layer. After the first electric heating module has operated for a preset time (i.e., after the defrosting rotor 132 has transferred heat to melt the frozen frost layer for the preset time), the frost layer on the defrosting rotor 132 softens and dissolves. The rotation control mechanism then controls the defrosting rotor 132 to rotate until the distance sensor 134 detects the vertical distance between the frost layer on the surface of the heat exchange tube 121 and the defrosting rotor 132. When the value is greater than 0, it indicates that the defrosting blade 132 is no longer frozen by the frost layer. Then, the lifting control mechanism controls the lifting frame 131 to drive the rotating defrosting blade 132 to move upward in the vertical direction and approach the heat exchange tube 121, so as to quickly remove the frost layer on the surface of the heat exchange tube 121.

[0062] In the process of rapid removal of frost layer by the defrosting device 13, the removed frost layer or frost water falls into the water pan 14 below, and the second electric heating module is opened synchronously. Since the water pan 14 is made of heat-conducting material and is connected with the second electric heating module, the frost layer falling into the water pan 14 is further melted to form frost water, so that the frost water is smoothly and quickly discharged from the drain port 142 of the water pan 14, avoiding that the melting speed of the frost layer falling into the water pan 14 is too slow to affect the discharge speed of the frost water.

[0063] Therefore, the defrosting device 13 of the refrigeration equipment 10 detects the vertical distance between the surface frost layer of the heat exchange pipe 121 and the defrosting rotating blade 132 by arranging the distance sensor 134 , and the vertical distance between the surface frost layer of the heat exchange pipe 121 and the defrosting rotating blade 132 is used as a basis to identify whether the defrosting rotating blade 132 is frozen by the frost layer, so as to reliably and effectively defrost the heat exchanger 12. The defrosting rotating blade 132 is made of heat-conducting material, and can quickly melt the frost layer on the surface of the heat exchange pipe 121 in a large area when the defrosting rotating blade 132 rotates to spread heat, so that the adhesion of the melting frost layer is reduced, and the defrosting rotating blade of the rotating defrosting rotating blade 132 can flexibly and quickly scrape off the frost layer on the surface of the heat exchange pipe 121, avoiding that the hard impact and scraping way to remove the frost layer easily causes deformation and damage to the heat exchange pipe 121, so as to ensure the refrigeration performance of the heat exchanger 12. Therefore, the refrigeration equipment 10 can automatically, stably, reliably and quickly effectively defrost the heat exchanger 12, so as to improve the defrosting effect and efficiency of the heat exchanger 12, and the defrosting operation will not cause any damage to the heat exchanger 12, thereby ensuring the refrigeration performance of the heat exchanger 12.

[0064] In order to further improve the heat conduction performance of the blades of the defrosting rotating blade 132, the first heat-conducting sheet 135 is arranged on each blade 1322 of the defrosting rotating blade 132, and the first heat-conducting sheet 135 is a heat-conducting metal sheet, so as to increase the heat transfer of the blade 1322 of the defrosting rotating blade 132, thereby accelerating the melting of the frost layer.

[0065] In combination Figures 11 to 15 , the first heat-conducting sheet 135 on each blade 1322 is not connected with the first electric heating module, so that the heat of the first heat-conducting sheet 135 is derived from the blade 1322. Alternatively, the first heat-conducting sheet 135 on each blade 1322 is connected with the first electric heating module, so that the heat of the first heat-conducting sheet 135 is derived from the first electric heating module, so that the heat of the first heat-conducting sheet 135 is higher.

[0066] In order to further increase the heat dissipation area, the first heat-conducting sheet 135 on each blade 1322 is arranged in a prismatic grid shape.

[0067] Specifically, the first heat-conducting sheet 135 is arranged on the back of the blade 1322 away from the heat exchanger 12, or the first heat-conducting sheet 135 is arranged inside the blade 1322, so as to avoid damage to the first heat-conducting sheet 135 caused by the blade 1322 of the defrosting rotating blade 132 in the process of scraping off frost layer, thereby improving the working reliability and stability of the first heat-conducting sheet 135.

[0068] Further, the first electric heating module of the embodiment is a first electric heating sheet, which is arranged on the middle hub 1321 of the defrosting rotating blade 132, so that the first electric heating sheet can heat the middle hub 1321 of the defrosting rotating blade 132 after being turned on, and the heat is quickly transferred to each blade 1322 of the defrosting rotating blade 132 to quickly melt the frost layer.

[0069] In order to further improve the defrosting effect and efficiency, the number of the defrosting rotating blades 132 of the embodiment is at least two, and the plurality of defrosting rotating blades 132 are arranged in rotation support on the lifting frame 131 to cover the heat exchanger 12 in the vertical direction, so as to completely remove the frost layer on the surface of the horizontally laid heat exchanger tube 121 of the heat exchanger 12.

[0070] In order to stably and reliably detect the vertical distance between the surface frost layer of the heat exchanger tube 121 and the defrosting rotating blade 132 , the number of the distance sensors 134 of the embodiment is at least two, and the plurality of distance sensors 134 are arranged in the horizontal direction on the lifting frame 131.

[0071] In combination Figure 9 and Figure 10 , the water collecting tray 14 of the embodiment is provided with a heat-conducting slide rail 141, the inner side of the heat-conducting slide rail 141 is provided with a first sliding groove 1411, the first sliding groove 1411 extends in the vertical direction, the lifting frame 131 is provided with a first sliding block 1311, the first sliding block 1311 is slidably embedded in the first sliding groove 1411 in the vertical direction, or the inner side of the heat-conducting slide rail 141 is provided with a second sliding block, the lifting frame 131 is provided with a second sliding groove, the second sliding groove extends in the vertical direction, and the second sliding groove is slidably sleeved on the second sliding block in the vertical direction. Therefore, the sliding block and the sliding groove are slidably matched in the vertical direction, which can ensure that the lifting frame 131 moves stably and reliably in the vertical direction.

[0072] Specifically, the lifting control mechanism for controlling the lifting frame 131 to move in the vertical direction is an electric motor, a lead screw, or a lifting mechanism such as an electric motor, a gear, and a rack. Moreover, the rotating control mechanism is a small electric motor 133, which is installed on the lifting frame 131, and the middle hub 1321 of the defrosting rotating blade 132 is sleeved on the driving shaft of the small electric motor 133.

[0073] In order to avoid frost at the slider and the sliding groove to affect the sliding work, the heat-conducting slide rail 141 of the embodiment is provided with a second heat-conducting sheet 142, which is a heat-conducting metal sheet, thereby increasing the heat transfer of the heat-conducting slide rail 141 to prevent frost from occurring on the heat-conducting slide rail 141, thereby ensuring the smoothness of the sliding fit of the slider and the sliding groove in the vertical direction. Specifically, the second heat-conducting sheet 142 on the heat-conducting slide rail 141 of the embodiment is not connected with the second electric heating module, so that the heat of the second heat-conducting sheet 142 is derived from the water pan 14 transmission. Alternatively, the second heat-conducting sheet 142 on the heat-conducting slide rail 141 is connected with the second electric heating module, so that the heat of the second heat-conducting sheet 142 is derived from the second electric heating module, so that the heat of the second heat-conducting sheet 142 is higher.

[0074] In order to further increase the heat dissipation area, the second heat-conducting sheet 142 on the heat-conducting slide rail 141 of the embodiment is arranged in a prismatic grid shape. And, in order to avoid damage to the second heat-conducting sheet 142 on the heat-conducting slide rail 141, the second heat-conducting sheet 142 of the embodiment is arranged on the outer side of the heat-conducting slide rail 141, which is arranged opposite to the inner side of the heat-conducting slide rail 141, or the second heat-conducting sheet 142 is arranged inside the heat-conducting slide rail 141, thereby avoiding the second heat-conducting sheet 142 from being arranged close to the lifting frame 131 to cause damage to the second heat-conducting sheet 142 during the movement of the lifting frame 131, thereby improving the working reliability and stability of the second heat-conducting sheet 142, In combination Figures 16 to 21 The water pan 14 of the embodiment includes a plurality of open grooves 144 and a plurality of closed grooves 145, which are alternately arranged and connected in the horizontal direction, the upper end of each open groove 144 is open to form a water receiving port, each open groove 144 and each closed groove 145 is respectively communicated with the drain port 142, and the groove wall adjacent to the closed groove 145 and the open groove 144 is provided with a perforated groove 146, so that the adjacent closed groove 145 and open groove 144 are communicated.

[0075] Thus, the large frost layer scraped off from the surface of the heat exchange tube 121 of the heat exchanger 12 will first fall on the upper end of the closed groove 145 for support, and then melt into frost water under the heat transfer of the water pan 14 to flow into the open groove 144, and then quickly and smoothly drain out through the drain port 142, thereby avoiding the large frost layer from directly falling into the pan groove containing the frost water, causing the frost water in the pan groove to splash into other areas of the refrigeration equipment 10, and then causing frost to appear in other areas of the refrigeration equipment 10, affecting the normal operation of the refrigeration equipment 10. Therefore, the water pan 14 of the present embodiment is formed by alternately arranging and connecting a plurality of open grooves 144 and a plurality of closed grooves 145 in the horizontal direction, which can prevent the frost water in the open groove 144 from splashing. Moreover, the groove wall adjacent to the closed groove 145 and the open groove 144 of the present embodiment is provided with a perforated groove 146, which enables the adjacent closed groove 145 and open groove 144 to communicate, and enables the hot air near the water pan 14 to flow through the perforated groove 146 better, thereby improving the heat dissipation rate and the melting rate of the frost layer on the closed groove 145.

[0076] Specifically, the second electric heating module of the present embodiment includes a plurality of second heating sheet groups 143, and one second heating sheet group 143 is arranged in one open groove 144. Moreover, one second heating sheet group 143 is located on the bottom end face of one open groove 144. Furthermore, each second heating sheet group 143 of the present embodiment is arranged in a prismatic grid shape, thereby further increasing the heat dissipation area.

[0077] Defrosting control method of refrigeration equipment The defrosting control method of the refrigeration equipment 10 of the present embodiment is the defrosting control method of the refrigeration equipment 10 described above, and the specific steps are as follows.

[0078] The refrigeration equipment 10 of the present embodiment is operated at a preset target temperature. For example, the preset target temperature of the refrigeration operation is 5℃.

[0079] Real-time acquisition of the cumulative duration of the refrigeration equipment 10 of the present embodiment in the open state The cumulative time that the user frequently opens the door panel 111 of the refrigeration equipment 10 to take and place food in the refrigeration chamber 112, for example, the time that the user opens the door panel 111 of the refrigeration equipment 10 to take and place food in the refrigeration chamber 112 for the first time is 10 s, the time that the user opens the door panel 111 of the refrigeration equipment 10 to take and place food in the refrigeration chamber 112 for the second time is 20 s, the time that the user opens the door panel 111 of the refrigeration equipment 10 to take and place food in the refrigeration chamber 112 for the third time is 15 s, the time that the user opens the door panel 111 of the refrigeration equipment 10 to take and place food in the refrigeration chamber 112 for the fourth time is 30 s, the time that the user opens the door panel 111 of the refrigeration equipment 10 to take and place food in the refrigeration chamber 112 for the fifth time is 1 min, the time that the user opens the door panel 111 of the refrigeration equipment 10 to take and place food in the refrigeration chamber 112 for the sixth time is 40 s, and so on, so that the cumulative time that the refrigeration equipment 10 is in the open state is the sum of 10 s, 20 s, 15 s, 30 s, 1 min, 40 s, and so on.

[0080] When the cumulative time that the refrigeration equipment 10 is in the open state is equal to or greater than the preset time length , it indicates that the frost layer condensed on the surface of the heat exchange pipe 121 will affect the refrigeration performance of the heat exchanger 12, and the refrigeration equipment 10 is controlled to stop refrigeration operation, that is, the heat exchanger 12 of the refrigeration equipment 10 stops refrigeration operation, and the distance sensor 134 arranged on the lifting frame 131 detects the vertical distance between the surface frost layer of the heat exchange pipe 121 and the defrosting rotating blade 132 . For example, the preset time length is 10 hours.

[0081] When it is determined that , that is, when the distance sensor 134 detects that the vertical distance between the surface frost layer of the heat exchange pipe 121 and the defrosting rotating blade 132 is When the value is greater than 0, it indicates that the defrost rotor 132 is not frozen by frost, thus controlling the first and second electric heating modules to turn on. Simultaneously, the lifting control mechanism controls the lifting frame 131 to move vertically upwards towards the heat exchange tube 121, and the rotation control mechanism controls the defrost rotor 132 to rotate. That is, the lifting control mechanism controls the lifting frame 131 to move the defrost rotor 132 vertically towards the heat exchange tube 121. Since the defrost rotor 132 contains heat-conducting material, and the central hub 1321 of the defrost rotor 132 is connected to the first electric heating module... The blocks are connected so that the heat from the first electric heating module is transferred to the defrost vane 132. The defrost vane 132 is rotated by the rotation control mechanism to spread the heat on the defrost vane 132 to melt the frost layer on the surface of the heat exchange tube 121 over a large area. The adhesion of the melting frost layer is reduced, so the blades 1322 of the rotating defrost vane 132 can flexibly and quickly scrape off the frost layer on the surface of the heat exchange tube 121, avoiding the deformation and damage to the heat exchange tube 121 that is easily caused by hard scraping to remove the frost layer, thereby ensuring the cooling performance of the heat exchanger 12. As the lifting control mechanism controls the lifting frame 131 to move the rotating defrost vane 132 in the vertical direction closer to the heat exchange tube 121 and to a preset safe position, the preset safe position is to avoid collision between the defrost vane 132 and the heat exchange tube 121, which would cause collision damage to both. This allows the defrost vane 132 to remain in the preset safe position for a certain period of time, and the heat emitted by the defrost vane 132 completely removes the frost layer on the surface of the heat exchange tube 121.

[0082] When it is determined that the condition is not met. When the distance sensor 134 detects the vertical distance between the frost layer on the surface of the heat exchange tube 121 and the defrosting rotor 132, that is, when the distance sensor 134 detects the vertical distance between the frost layer on the surface of the heat exchange tube 121 and the defrosting rotor 132. When the value is less than or equal to 0, it indicates that the defrosting rotor 132 is frozen by frost. The first and second electric heating modules are then activated. Since the defrosting rotor 132 contains heat-conducting material and its central hub 1321 is connected to the first electric heating module, heat from the first electric heating module is transferred to and dissipated from the rotor, melting the frost. After the first electric heating module has operated for a preset time (i.e., after the defrosting rotor 132 has transferred heat to melt the frozen frost), the frost has softened and dissolved. The rotation control mechanism then controls the rotor 132 to rotate until the distance sensor 134 detects the vertical distance between the frost on the surface of the heat exchange tube 121 and the defrosting rotor 132. When it is greater than 0, that is, until it is determined that the condition is met. When the preset time is reached, it indicates that the defrosting rotating blade 132 has not been frozen by the frost layer, and then the lifting control mechanism controls the lifting frame 131 to drive the defrosting rotating blade 132 in the rotating state to move upward in the vertical direction to approach the heat exchange pipe 121, so as to quickly remove the frost layer on the surface of the heat exchange pipe 121. For example, the preset time is 10 seconds.

[0083] Therefore, the defrosting device 13 of the refrigeration equipment 10 in the embodiment detects the vertical distance between the frost layer on the surface of the heat exchange pipe 121 and the defrosting rotating blade 132 by arranging the distance sensor 134 , so as to determine whether the defrosting rotating blade 132 is frozen by the frost layer based on the vertical distance between the frost layer on the surface of the heat exchange pipe 121 and the defrosting rotating blade 132 . The defrosting rotating blade 132 is made of a heat-conducting material, and can quickly melt the frost layer on the surface of the heat exchange pipe 121 in a large area when the defrosting rotating blade 132 rotates to spread heat, so that the adhesion of the melting frost layer is reduced, and the blade 1322 of the rotating defrosting rotating blade 132 can quickly and flexibly scrape off the frost layer on the surface of the heat exchange pipe 121, thereby avoiding the hard impact and scraping method for removing the frost layer, which can easily cause deformation and damage to the heat exchange pipe 121, so as to ensure the refrigeration performance of the heat exchanger 12. Therefore, the refrigeration equipment 10 in the embodiment can automatically, stably, reliably and quickly perform effective defrosting operation on the heat exchanger 12, so as to improve the defrosting effect and efficiency of the heat exchanger 12, and the defrosting operation will not cause any damage to the heat exchanger 12, thereby ensuring the refrigeration performance of the heat exchanger 12.

[0084] Further, the flow sensor is arranged at the drain port 142 of the water collecting tray 14 of the refrigeration equipment 10, and the flow sensor is used to detect the drainage flow rate of the drain port 142 per unit time . Therefore, the defrosting control method of the refrigeration equipment 10 in the embodiment further comprises: obtaining the drainage flow rate of the drain port 142 of the water collecting tray 14 per unit time ; when the drainage flow rate is less than the preset flow rate, increasing the heating power of the second electric heating module, so as to increase the transmission temperature of the water collecting tray 14, and accelerate the melting of the frost layer falling to the water collecting tray 14.

[0085] The above embodiments are only preferred examples of the present application, and do not limit the scope of the present application. Any equivalent changes or modifications made according to the structure, features and principles of the present application shall be included in the scope of the present application.​

Claims

1. A refrigeration device, comprising a cabinet and a heat exchanger, wherein the heat exchanger is located in the cabinet, and the heat exchange tubes of the heat exchanger are arranged horizontally, characterized in that: the refrigeration device further comprises a defrosting device and a water collecting tray located in the cabinet, the defrosting device is located below the heat exchanger in the vertical direction, and the defrosting device comprises a lifting control mechanism, a lifting frame, a rotating control mechanism, a defrosting rotating blade and a distance sensor, the lifting control mechanism controls the lifting frame to move in the vertical direction, the rotating control mechanism is arranged on the lifting frame and controls the rotation of the defrosting rotating blade, the middle hub of the defrosting rotating blade is connected with a first electric heating module, and the distance sensor is arranged on the lifting frame and detects the vertical distance between the frost layer on the surface of the heat exchange tube and the defrosting rotating blade; the defrosting rotating blade and the water collecting tray both comprise a heat-conducting material, the water collecting tray is located below the defrosting device and is provided with a water collecting port and a drainage port, the upper end of the water collecting tray is open to the water collecting port, and the water collecting tray is connected with a second electric heating module.

2. The refrigeration device according to claim 1, characterized in that: a first heat-conducting sheet is arranged on each blade of the defrosting rotating blade, and the first heat-conducting sheet is a heat-conducting metal sheet; the first heat-conducting sheet is connected with the first electric heating module, or the first heat-conducting sheet is not connected with the first electric heating module.

3. The refrigeration device according to claim 2, characterized in that: the first heat-conducting sheet is arranged in a prismatic grid shape.

4. The refrigeration device according to claim 2, characterized in that: the first heat-conducting sheet is arranged on the back surface of the blade away from the heat exchanger; or the first heat-conducting sheet is arranged inside the blade.

5. The refrigeration device according to claim 1, characterized in that: the first electric heating module is a first electric heating sheet, and the first electric heating sheet is arranged on the middle hub.

6. The refrigeration device according to claim 1, characterized in that: the number of the defrosting rotating blades is at least two, and a plurality of the defrosting rotating blades are arranged in rotation support on the lifting frame to cover the heat exchanger in the vertical direction; and / or the number of the distance sensors is at least two, and a plurality of the distance sensors are arranged in the horizontal direction on the lifting frame.

7. The refrigeration device according to claim 1, characterized in that: the water collecting tray is provided with a heat-conducting slide rail; an inner side surface of the heat-conducting slide rail is provided with a first sliding groove extending in the vertical direction, the lifting frame is provided with a first sliding block which is slidably embedded in the first sliding groove in the vertical direction; or an inner side surface of the heat-conducting slide rail is provided with a second sliding block, the lifting frame is provided with a second sliding groove extending in the vertical direction, and the second sliding groove is slidably sleeved on the second sliding block in the vertical direction.

8. The refrigeration device according to claim 7, characterized in that: the heat-conducting slide rail is provided with a second heat-conducting sheet, and the second heat-conducting sheet is a heat-conducting metal sheet. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The second heat-conducting sheet is connected with the second electric heating module, or the second heat-conducting sheet is not connected with the second electric heating module.

9. The refrigeration device according to claim 8, characterized in that: The second heat-conducting sheet is arranged in a prismatic grid shape.

10. The refrigeration device according to claim 8, characterized in that: The second heat-conducting sheet is arranged on the outer side of the heat-conducting slide rail, which is arranged opposite to the inner side of the heat-conducting slide rail. Or, the second heat-conducting sheet is arranged inside the heat-conducting slide rail.

11. The refrigeration device according to any one of claims 1 to 10, characterized in that: The water collecting tray comprises a plurality of open grooves and a plurality of closed grooves, the plurality of open grooves and the plurality of closed grooves are arranged alternately in the horizontal direction, the upper end of each open groove is open to form the water collecting opening, and each open groove and each closed groove is in communication with the water drainage opening; The groove wall adjacent to the closed groove and the open groove is provided with a perforated groove, so that the adjacent closed groove and open groove are in communication.

12. The refrigeration device according to claim 11, characterized in that: The second electric heating module comprises a plurality of second heating sheet groups, and one second heating sheet group is arranged in one open groove.

13. The refrigeration device according to claim 12, characterized in that: One second heating sheet group is arranged on the bottom end surface of one open groove; And / or, each second heating sheet group is arranged in a prismatic grid shape.

14. A defrosting control method of a refrigeration device, characterized in that: The refrigeration device is the refrigeration device according to any one of claims 1 to 13, and the defrosting control method comprises: Acquiring cumulative length of time during which a refrigeration appliance is in an open state ; When the accumulated length of time is equal to or greater than a preset length of time , the refrigeration device is controlled to stop a refrigeration operation, and a vertical distance between a frost layer on a surface of the heat exchange pipe and the defrosting rotating blade is obtained . When it is determined that the condition is met then the first and second electric heating modules are controlled to be turned on, the lifting control mechanism is controlled to move the lifting frame upward in the vertical direction to approach the heat exchange tube, and the rotation control mechanism is controlled to rotate the defrosting rotating blade. When it is determined that the condition is not met , the first electric heating module and the second electric heating module are first controlled to be turned on. When the first electric heating module operates for a preset time, the defrosting rotating blade is controlled to rotate by the rotating control mechanism until it is determined that the condition is met . Then, the lifting control mechanism controls the lifting frame to move upward in the vertical direction to approach the heat exchange tube.

15. The defrosting control method of the refrigeration device according to claim 14, characterized in that: A flow sensor is provided at a drain port of the refrigeration device, and the flow sensor is used to detect the drain flow per unit time of the drain port ; The defrosting control method of the refrigeration device further comprises: acquiring a drain flow rate of the drain port ; When the drainage flow rate is less than a preset flow rate, the heating power of the second electric heating module is increased.

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