Refrigeration equipment, defrosting control method and storage medium thereof

Abstract

The embodiment of the invention discloses refrigeration equipment, a defrosting control method and a storage medium thereof, the refrigeration equipment comprises a freezing chamber, the freezing chamber comprises a storage drawer, a defrosting space is formed between a front panel of the storage drawer and a door body of the refrigeration equipment, and a turbulent flow device is arranged in the defrosting space; a fan and an evaporator are arranged in the first air duct; the second air duct comprises a heating device, and at least one part of the second air duct communicates with the defrosting space; and the air door assembly is used for adjusting the first air duct to be in butt joint with the second air duct to form a first circulating air duct in a defrosting mode. By arranging the fan and the heating device, a defrosting space which is higher than the freezing chamber in temperature and prevents frost from being directly melted can be established between the storage drawer and the door body of the refrigeration equipment, a frost layer on a front panel of the storage drawer is subjected to heat exchange evaporation, and evaporated water vapor is carried to a low-temperature evaporator under the action of the fan to re-frost; the defrosting time is shortened; and the load temperature rise caused by defrosting is reduced.

Description

Technical Field

[0001] The present invention relates to the field of defrosting technology, and in particular to a refrigeration device, a defrosting control method and a storage medium thereof. Background Art

[0002] After a deep freezer has been running for a long time, frost will accumulate and form on the front panel of the refrigerator drawer. Frost will exist for a long time and accompany the opening and closing of the refrigerator door. The frost on the surface will easily melt into water and condense into ice again, which will not only affect the user experience, but also cause the refrigerator door to be unable to open and close normally. At present, existing refrigerators defrost through a freezing evaporator, but this defrosting method cannot remove the frost layer on the front panel of the drawer. Some refrigerators also extend the defrosting time to raise the temperature of the entire freezer compartment to above 0°C, melt the frost layer into water and discharge it into the water collection box, which will cause the food stored in the freezer compartment to warm up too much, which is not conducive to the refrigerated storage of food. Summary of the invention

[0003] The purpose of the present invention is to solve at least one of the technical problems existing in the prior art, and to provide a refrigeration device, a defrost control method and a storage medium thereof, which can effectively improve the defrost efficiency of the refrigerator, shorten the defrost time, and effectively reduce the load temperature rise caused by defrosting.

[0004] In a first aspect, an embodiment of the present invention provides a refrigeration device, including:

[0005] A freezer compartment, the freezer compartment comprising a storage drawer, a defrost space being formed between a front panel of the storage drawer and a door body of the refrigeration device, and a turbulent device for slowing down air flow speed being provided in the defrost space;

[0006] a first air duct, wherein a fan and an evaporator are disposed in the first air duct;

[0007] a second air duct, comprising a heating device, wherein at least a portion of the second air duct is connected to the defrost space;

[0008] The damper assembly is used to adjust the first air duct and the second air duct to connect to form a first circulation air duct in the defrost mode.

[0009] The refrigeration device provided according to the embodiment of the present invention has at least the following beneficial effects: by arranging a fan and a heating device, a defrost space can be established between the storage drawer and the door body of the refrigeration device, the temperature of which is higher than that of the freezer but prevents frost from melting directly, so that the frost layer on the front panel of the storage drawer can be evaporated by heat exchange, and the evaporated water vapor is carried to the low-temperature evaporator under the action of the fan to re-frost, thereby achieving the purpose of frost removal, effectively enhancing the defrost efficiency, shortening the defrost time and reducing the load temperature rise caused by defrosting.

[0010] In the above refrigeration device, the damper assembly is also used to adjust the first air duct to dock with the storage drawer to form a second circulation air duct in the refrigeration mode.

[0011] In the above-mentioned refrigeration equipment, the first air duct is provided with a first air outlet connected to the air inlet of the second air duct and a second air outlet connected to the air inlet of the storage drawer; the damper assembly switches the first air outlet and the second air outlet so that the first air duct is connected to the second air duct and the storage drawer respectively.

[0012] In the above refrigeration device, the air outlet of the second air duct is located at the top of the defrost space, and the air inlet of the first air duct is located below the storage drawer.

[0013] In the above refrigeration device, the surface of the flow-turbulating device has at least one of a wave shape, a bow shape, a square shape and a needle shape, or the flow-turbulating device includes a flow-around blade that rotates in a controlled manner.

[0014] In the above refrigeration device, the spoiler is mounted on a side of the door body facing the front panel of the storage drawer, or the front panel of the storage drawer forms the spoiler.

[0015] In a second aspect, an embodiment of the present invention provides a defrost control method, which is applied to the refrigeration equipment as described above;

[0016] The defrost control method comprises:

[0017] When the cumulative refrigeration operation time of the refrigeration device reaches a first predetermined time, the temperature of the freezer compartment is less than or equal to a set temperature and the temperature of the defrost space is less than a first temperature, the defrost mode is entered, and the first temperature is determined according to the ice crystal zone temperature of the items in the storage drawer and a preset first compensation temperature;

[0018] Controlling the damper assembly to connect the first air duct with the second air duct to form a first circulation air duct, and starting the heating device;

[0019] When the temperature of the defrost space is greater than the second temperature and the accumulated time of entering the defrost mode is less than the second predetermined time, the heating device is turned off, the compressor is started and the damper assembly is controlled to allow the first air duct to dock with the storage drawer to form a second circulation air duct, and the second temperature is determined based on the ice crystal zone temperature of the items in the freezer and a preset second compensation temperature.

[0020] The defrost control method provided in the embodiment of the present invention has at least the following beneficial effects: by arranging a fan and a heating device, a defrost space can be established between the storage drawer and the door body of the refrigeration equipment, the temperature of which is higher than that of the freezer but prevents the frost from melting directly, the frost layer on the front panel of the storage drawer is evaporated by heat exchange, and the evaporated water vapor is carried to the low-temperature evaporator by the action of the fan to re-frost, thereby achieving the purpose of frost removal, effectively enhancing the defrost efficiency, shortening the defrost time and reducing the load temperature rise caused by defrosting.

[0021] In the above-mentioned defrost control method, the method further comprises:

[0022] When the temperature of the freezing chamber is higher than the set temperature, the freezing mode is entered;

[0023] The compressor is started and the damper assembly is controlled so that the first air duct is docked with the storage drawer to form a second circulation air duct.

[0024] In the above-mentioned defrost control method, after entering the defrost mode, the method includes:

[0025] The compressor is controlled to stop, and the fan is controlled to run at a preset speed.

[0026] In the above-mentioned defrost control method, when the cumulative refrigeration operation time of the refrigeration equipment reaches a first predetermined time, the temperature of the freezing chamber is less than or equal to the set temperature and the temperature of the defrost space is less than a first temperature, entering the defrost mode includes:

[0027] When the cumulative refrigeration operation time of the refrigeration device reaches a first predetermined time, the temperature of the freezer compartment is less than or equal to the set temperature, the temperature of the defrost space is less than the first temperature, and the cumulative number of door openings of the refrigeration device is greater than a preset door opening threshold, the defrost mode is entered;

[0028] or,

[0029] When the cumulative refrigeration operation time of the refrigeration equipment reaches a first predetermined time, the temperature of the freezer compartment is less than or equal to the set temperature, the temperature of the defrost space is less than the first temperature and the cumulative door opening time of the refrigeration equipment is greater than a preset time threshold, the defrost mode is entered.

[0030] In the above-mentioned defrost control method, when entering the defrost mode, the method further includes:

[0031] The accumulated refrigeration operation time is reset to zero, and the accumulated time of entering the defrost mode is recorded.

[0032] In the above-mentioned defrost control method, after starting the heating device, the method further includes:

[0033] When the temperature of the defrost space is greater than the second temperature, and the accumulated time of entering the defrost mode is greater than the second predetermined time, the accumulated time of entering the defrost mode is reset to zero, the heating device is turned off, the compressor is started and the damper assembly is controlled to allow the first air duct to dock with the storage drawer to form a second circulation air duct.

[0034] In third aspect, an embodiment of the present invention provides a defrost control device, characterized in that it comprises at least one control processor and a memory for communicating with the at least one control processor; the memory stores instructions executable by the at least one control processor, and the instructions are executed by the at least one control processor so that the at least one control processor can execute the control method as described above.

[0035] The defrost control device provided in accordance with the embodiment of the present invention has at least the following beneficial effects: by arranging a fan and a heating device, a defrost space can be established between the storage drawer and the door body of the refrigeration equipment, the temperature of which is higher than that of the freezer but prevents the frost from melting directly, the frost layer on the front panel of the storage drawer is evaporated by heat exchange, and the evaporated water vapor is carried to the low-temperature evaporator by the action of the fan to re-frost, thereby achieving the purpose of frost removal, effectively enhancing the defrost efficiency, shortening the defrost time and reducing the load temperature rise caused by defrosting.

[0036] In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, characterized in that the computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are used to enable a computer to execute the control method as described above.

[0037] The computer-readable storage medium provided in accordance with the embodiment of the present invention has at least the following beneficial effects: by arranging a fan and a heating device, a defrost space can be established between the storage drawer and the door body of the refrigeration equipment, the temperature of which is higher than that of the freezer but prevents frost from melting directly, so that the frost layer on the front panel of the storage drawer can be evaporated by heat exchange, and the evaporated water vapor is carried to the low-temperature evaporator under the action of the fan to re-frost, thereby achieving the purpose of frost removal, effectively enhancing the defrost efficiency, shortening the defrost time and reducing the load temperature rise caused by defrosting.

[0038] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The accompanying drawings are used to provide a further understanding of the technical solution of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the technical solution of the present invention and do not constitute a limitation on the technical solution of the present invention.

[0040] Figure 1 is a structural schematic diagram of a refrigeration device provided by an embodiment of the present invention;

[0041] Figure 2 is a structural schematic diagram of a refrigeration device provided by another embodiment of the present invention;

[0042] Figure 3 is a flow chart of a defrosting control method provided by an embodiment of the present invention;

[0043] Figure 4 is a flow chart of a defrosting control method provided by another embodiment of the present invention;

[0044] Figure 5 yes Figure 3 Flow chart of step S1000;

[0045] Figure 6 yes Figure 3 Flow chart of step S2000;

[0046] Figure 7 yes Figure 3 Flowchart of step S3000;

[0047] Figure 8 It is a schematic diagram of a refrigeration control device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0048] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0049] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0050] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0051] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0052] The embodiment of the present invention provides a refrigeration device, a defrost control method and a storage medium thereof. By arranging a fan and a heating device, a defrost space can be established between a storage drawer and a door body of the refrigeration device, the temperature of which is higher than that of the freezer but prevents frost from melting directly. The frost layer on the front panel of the storage drawer is evaporated by heat exchange, and the evaporated water vapor is carried to a low-temperature evaporator under the action of the fan to re-frost, thereby achieving the purpose of frost removal, effectively enhancing the defrost efficiency, shortening the defrost time and reducing the load temperature rise caused by defrosting.

[0053] The embodiments of the present invention are further described below in conjunction with the accompanying drawings.

[0054] See also Figure 1 and Figure 2 , Figure 1 and Figure 2 The first aspect of the present invention provides a schematic diagram of the structure of a refrigeration device. Figure 1 and Figure 2 As shown, the refrigeration equipment provided in this embodiment includes: a freezer chamber 600, the freezer chamber 600 includes a storage drawer 610, a defrost space 630 is formed between the front panel 611 of the storage drawer and the door body 620 of the refrigeration equipment, and a spoiler 640 for slowing down the air flow speed is provided in the defrost space 630; a first air duct 700, a fan 710 and an evaporator 720 are provided in the first air duct 700; a second air duct 800, including a heating device 810, at least a part of the second air duct 800 is connected to the defrost space 630; a damper assembly 730, used to adjust the first air duct 700 and the second air duct 800 to connect to form a first circulation air duct in the defrost mode.

[0055] It is understandable that by providing the fan 710 and the heating device 810, a defrost space 630 with a temperature higher than that of the freezer 600 but preventing the frost from melting directly can be established between the storage drawer 610 and the door body 620 of the refrigeration device, and the frost layer on the front panel 611 of the storage drawer is evaporated by heat exchange, and the evaporated water vapor is carried to the low-temperature evaporator 720 for re-frost under the action of the fan 710, so as to achieve the purpose of frost removal, effectively enhance the defrost efficiency, shorten the defrost time and reduce the load temperature rise caused by defrosting. By providing the spoiler 640, the air flow speed in the defrost space 630 is effectively slowed down to improve the defrost effect.

[0056] It is understandable that the heating device 810 can use a heating wire, a heating film, an external hot air duct, a condenser tube and other structures to heat the air in the second air duct 800. When the first air duct 700 and the second air duct 800 are connected to form a first circulation air duct, the fan 710 drives the air with a lower temperature in the first air duct 700 into the second air duct 800, and after the heating operation of the heating device 810, it becomes air with a higher temperature, and heats and defrosts the defrost space 630. In addition, a spoiler can be set between the second air duct 800 and the heating device 810, so that the air with a lower temperature can fully contact the heating device 810, thereby improving the heating effect of the heating device 810.

[0057] In another embodiment, the damper assembly 730 is also used to adjust the first air duct 700 to dock with the storage drawer 610 to form a second circulation air duct in the cooling mode. By setting the damper assembly 730, the first air duct 700 is docked with the storage drawer 610 to form a second circulation air duct, so that the compressor 660 and the evaporator 720 can cool the storage drawer 610, thereby improving the cooling effect of the refrigeration equipment.

[0058] In another embodiment, the first air duct 700 is provided with a first air vent 740 connected to the air inlet of the second air duct 800 and a second air vent 750 connected to the air inlet of the storage drawer; the damper assembly 730 switches the first air vent 740 and the second air vent 750 so that the first air duct 700 is docked with the second air duct 800 and the storage drawer 610 respectively. By providing the first air vent 740 and the second air vent 750, it is convenient for the damper assembly 730 to dock the first air duct 700 with the second air duct 800 and the storage drawer 610 respectively through the switching operation, so as to ensure that the refrigeration equipment can quickly switch between the defrosting mode and the refrigeration mode, and ensure the defrosting efficiency of the refrigeration equipment. In actual application, the damper assembly 730 can switch the first air vent 740 and the second air vent 750 by using the structure of a rotating damper, and can also install valves on the first air vent 740 and the second air vent 750 respectively, and switch by controlling the valve, which will not be repeated here.

[0059] In another embodiment, the air outlet of the second air duct 800 is located at the top of the defrosting space 630, and the air inlet of the first air duct 700 is located below the storage drawer 610. This structure ensures that in the defrosting mode, the hot air after passing through the heating device 810 can evenly and stably defrost the front panel 611 of the storage drawer, and the water vapor enters the first air duct 700 along the first circulation air duct, avoiding the situation of incomplete defrosting.

[0060] In another embodiment, the surface of the spoiler 640 has at least one of a wave shape, an arch shape, a square shape and a needle shape, or the spoiler 640 includes a flow-circling blade that rotates in a controlled manner. By arranging the spoiler 640 in the defrost space 630, the defrosting efficiency can be enhanced, the defrosting time can be shortened, and the load temperature rise caused by defrosting can be effectively reduced. Among them, the surface of the spoiler 640 has different shapes, or the spoiler 640 is a flow-circling blade that rotates in a controlled manner, which effectively increases the contact time between the hot air and the front panel 611 of the storage drawer, and improves the heat exchange efficiency between the hot air and the frost layer.

[0061] In another embodiment, the spoiler 640 is mounted on the side of the door body 620 facing the front panel 611 of the storage drawer, or the front panel 611 of the storage drawer forms the spoiler 640. Figure 1 As shown, the spoiler 640 is an independently installed spoiler plate and is installed on the side of the front panel 611 of the door body 620 facing the storage drawer. In actual application, the spoiler 640 can be assembled on the door body 620 by gluing, screws, ferrules, etc., so as to facilitate the disassembly and maintenance of the spoiler 640. It is understandable that, if Figure 2 As shown, the front panel 611 of the storage drawer forms a spoiler 640, that is, the surface of the front panel 611 of the storage drawer forms a wavy, arched, square, needle-shaped and other shapes, which not only enhances the defrosting effect, but also improves the integrity of the spoiler 640 and the storage drawer 610.

[0062] It is understandable that in order to ensure that the defrost status of the front panel 611 of the storage drawer can be obtained in real time, the temperature of the defrost space 630 needs to be detected. In actual applications, a temperature sensor 650 is set in the defrost space 630. Specifically, the temperature sensor 650 is installed on the side of the door body 620 facing the defrost space 630.

[0063] See also Figure 3 , Figure 3 FIG. 2 is a flow chart showing a defrosting control method provided by an embodiment of the second aspect of the present invention. Figure 3 As shown, the defrost control method includes the following steps:

[0064] Step S1000: When the cumulative refrigeration operation time of the refrigeration equipment reaches a first predetermined time, the temperature of the freezer is less than or equal to the set temperature and the temperature of the defrost space is less than a first temperature, the defrost mode is entered, and the first temperature is determined according to the ice crystal zone temperature of the items in the storage drawer and a preset first compensation temperature.

[0065] It is understandable that before defrosting the refrigeration equipment, the refrigeration equipment needs to be installed and prepared for operation, such as ensuring that the refrigerant pipeline connection between the compressor 660 and the evaporator 720 in the refrigeration equipment is stable; the fan 710, the evaporator 720 and the damper assembly 730 in the first air duct 700 are all operating normally, and the heating device 810 in the second air duct 800 is operating normally; the connection between the first air duct 700, the second air duct 800 and the storage drawer 610 is stable, and through the switching of the damper assembly 730, the first air duct 700 is connected to the second air duct 800 and the storage drawer 610 respectively; the temperature sensor 650 can accurately obtain the temperature of the defrost space 630; the opening control unit of the compressor 660, the fan 710, the damper assembly 730 and the heating device 810 operate normally, and can accurately control the damper assembly 730 to switch the air outlet, and accurately control the shutdown and startup of the compressor 660, the fan 710 and the heating device 810. At the same time, when the compressor 660, the fan 710, the damper assembly 730 and the heating device 810 are in operation, the refrigeration device communicates with the compressor 660, the fan 710, the damper assembly 730 and the temperature sensor 650 to obtain the temperature of the defrost space 630 in real time.

[0066] It is understandable that when a refrigeration device such as a refrigerator, after a period of refrigeration in the freezer compartment 600, a large temperature difference is formed between the inside and outside of the freezer compartment 600. When the water vapor around the refrigerator is cooled, frost will form in the refrigerator. If the refrigeration device is in the refrigeration mode for a long time, the temperature of the freezer compartment 600 and the temperature of the defrost space 630 are too low, and a layer of frost will form in the freezer compartment 600, especially on the front panel 611 of the storage drawer. At the same time, the frost will gradually become thicker as the door body 620 of the refrigeration device is opened, affecting the normal use of the refrigeration device. Therefore, the judgment standard for whether the refrigeration device enters the defrost mode is the cumulative refrigeration operation time, the temperature of the freezer compartment 600, and the temperature of the defrost space 630. In actual application, when the cumulative refrigeration operation time of the refrigeration device reaches the first predetermined time, the temperature of the freezer compartment 600 is less than or equal to the set temperature, and the temperature of the defrost space 630 is less than the first temperature, the refrigeration device determines that there is a frost layer in the freezer compartment 600 and enters the defrost mode.

[0067] It is understandable that the cumulative refrigeration operation time can be counted by the working time of the refrigeration components in the refrigeration equipment. In practical applications, the cumulative refrigeration operation time of the refrigeration equipment can be counted by recording the cumulative start time of the compressor 660 through a timing device matched with the compressor 660. Among them, recording the cumulative refrigeration operation time of the refrigeration equipment by a timing device belongs to the prior art and will not be repeated here.

[0068] It is understandable that since the main cause of frost is the large temperature difference between the inside and outside of the freezing chamber 600, which causes water vapor to condense when it encounters cold, it is necessary to monitor the temperature of the freezing chamber 600 in real time to avoid the temperature difference between the inside and outside of the freezing chamber 600 being too large, which causes the frost to form too quickly in the freezing chamber 600. In addition, since the defrost space 630 is formed between the front panel 611 of the storage drawer and the door body 620 of the refrigeration device, when the door body 620 of the refrigeration device is opened, the defrost space 630 is connected to the outside, which makes it easy for water vapor around the refrigeration device to encounter cold and condense on the defrost space 630 and the front panel 611 of the storage drawer. By monitoring and controlling the temperature of the defrost space 630 in real time, the accumulation of frost in the freezing chamber 600 and the defrost space 630 can be effectively grasped, so that the refrigeration device can accurately determine whether to enter the defrost mode, and avoid the situation where the frost is too thick or the refrigeration effect of the freezing chamber 600 is poor.

[0069] See also Figure 5 , Figure 5 FIG. 5 shows a schematic diagram of a specific implementation process of the above step S1000. Figure 5 As shown, step S1000 at least includes the following steps:

[0070] Step S1100: determining a first temperature according to the ice crystal zone temperature of the items in the storage drawer and a preset first compensation temperature.

[0071] It can be understood that the ice crystal zone is the maximum ice crystal formation zone. When the center temperature of most foods drops from -1°C to -5°C, nearly 80% of the water can be frozen into ice. This temperature range is called the maximum ice crystal formation zone. Most ice crystals are formed between -1 and -5°C. The maximum ice crystal formation zone is the most important temperature range to ensure the quality of frozen food. The formation method of ice crystals in the maximum ice crystal formation zone has a great impact on the quality of food. However, the freezing point of many foods is lower than -1°C, so the temperature range of the maximum ice crystal formation zone is also different. In order to ensure the refrigeration effect of the items in the freezer 600, the temperature Tfd of the defrost space 630 needs to be maintained below the ice crystal zone temperature Tice of the items in the storage drawer in the defrosting mode to achieve the effect of freezing and defrosting. Therefore, in actual application, the ice crystal zone temperature Tice of the items in the freezer and the preset first compensation temperature Δt1 are introduced to determine the first temperature T1.

[0072] It is understandable that after obtaining the current temperature Tfd of the defrost space 630 by setting a temperature sensor 650 in the defrost space 630, the magnitude relationship between the temperature Tfd of the defrost space 630 and the first temperature T1 can be determined. The first temperature T1 is determined according to the ice crystal zone temperature Tice of the items in the storage drawer and the preset first compensation temperature Δt1. Therefore, it is necessary to adjust the ice crystal zone temperature and the first compensation temperature for the items in different storage drawers, and ensure that the temperature of the defrost space is lower than the first temperature to ensure the preservation effect of the items, and also prevent the heating device 810 from working for a long time, causing the items in the storage drawer to exceed the ice crystal zone temperature.

[0073] Step S1200: When the cumulative refrigeration operation time of the refrigeration equipment reaches the first predetermined time, the temperature of the freezer compartment is less than or equal to the set temperature, the temperature of the defrost space is less than the first temperature and the cumulative number of door openings of the refrigeration equipment is greater than the preset door opening threshold, enter the defrost mode.

[0074] It is understandable that, in addition to considering the cumulative refrigeration operation time of the refrigeration equipment, the temperature of the freezer compartment and the temperature of the defrosting space, if the cumulative number of door openings of the refrigeration equipment is too many, it will also cause excessive water vapor around the refrigeration equipment to condense on the front panel 611 of the storage drawer with a lower temperature and form frost. After the door body 620 of the refrigeration equipment is opened and closed many times, the frost on the front panel 611 of the storage drawer accumulates to a certain thickness, which will affect the normal closure of the door body 620 of the refrigeration equipment, making it impossible to seal the freezer compartment 600, greatly affecting the refrigeration effect of the refrigeration equipment.

[0075] In practical applications, a trigger is provided between the door body 620 of the refrigeration device and the freezer compartment 600, and a counting device connected to the trigger is provided. When the door body 620 of the refrigeration device is opened, the trigger is activated and records the door opening time. When the door opening time reaches a certain time, such as 10 seconds, the current door opening operation is recorded, and the trigger sends a counting instruction to the counting device, and the cumulative number of door openings of the refrigeration device is increased by one, so as to ensure the accuracy and authenticity of the cumulative number of door openings of the refrigeration device, and avoid the false triggering of the trigger and the situation where the door opening time is too short, which affects the authenticity of the cumulative number of door openings of the refrigeration device, and leads to the frequent start-up of the fan 710 and the heating device 810.

[0076] It is understandable that after obtaining the cumulative number of door openings of the refrigeration equipment through the trigger and the counting device, the thickness of the frost in the freezer compartment 600 can be determined. In actual applications, the preset door opening threshold is set to 3 times, that is, when the cumulative refrigeration operation time of the refrigeration equipment reaches the first predetermined time, the temperature of the freezer compartment is less than or equal to the set temperature, and the temperature of the defrosting space is less than the first temperature, the cumulative number of door openings of the refrigeration equipment is greater than 3 times, and the refrigeration equipment enters the defrosting mode. By counting the cumulative number of door openings of the refrigeration equipment in real time, it can effectively ensure that the fan 710, the heating device 810 and the damper assembly 730 can determine whether to defrost the freezer compartment according to the number of times the door body 620 of the refrigeration equipment is opened, thereby improving the correlation between the number of times the door body 620 is opened and the working state of the fan 710, the heating device 810 and the damper assembly 730.

[0077] Step S1300: When the cumulative refrigeration operation time of the refrigeration equipment reaches the first predetermined time, the temperature of the freezer compartment is less than or equal to the set temperature, the temperature of the defrost space is less than the first temperature and the cumulative door opening time of the refrigeration equipment is greater than the preset time threshold, enter the defrost mode.

[0078] It is understandable that, in addition to considering the cumulative refrigeration operation time of the refrigeration equipment, the temperature of the freezer compartment and the temperature of the defrosting space, if the cumulative door opening time of the refrigeration equipment is too long, it will also cause excessive water vapor around the refrigeration equipment to condense on the front panel 611 of the storage drawer with a lower temperature and form frost. After the opening time of the door body 620 of the refrigeration equipment reaches a certain length, the frost on the front panel 611 of the storage drawer accumulates to a certain thickness, which will affect the normal closing of the door body 620 of the refrigeration equipment, making it impossible to seal the freezer compartment 600, greatly affecting the refrigeration effect of the refrigeration equipment.

[0079] In practical applications, a trigger is provided between the door body 620 of the refrigeration device and the freezer compartment 600, and a timing device connected to the trigger is provided. When the door body 620 of the refrigeration device is opened, the trigger is activated and sends a counting instruction to the timing device to record the accumulated door opening time of the refrigeration device, so as to ensure the accuracy and authenticity of the accumulated door opening time statistics of the refrigeration device.

[0080] It is understandable that after obtaining the cumulative door opening time of the refrigeration equipment through the trigger and the timing device, the thickness of the frost in the freezer compartment 600 can be determined. In actual applications, the preset time threshold is set to 5 minutes, that is, when the cumulative refrigeration operation time of the refrigeration equipment reaches the first predetermined time, the temperature of the freezer compartment is less than or equal to the set temperature, and the temperature of the defrosting space is less than the first temperature, the cumulative door opening time of the refrigeration equipment is greater than 5 minutes, and the refrigeration equipment enters the defrosting mode. By real-time statistics of the cumulative door opening time of the refrigeration equipment, it can be effectively ensured that the fan 710, the heating device 810 and the damper assembly 730 can determine whether to defrost the freezer compartment according to the opening time of the door body 620 of the refrigeration equipment, thereby improving the correlation between the opening time of the door body 620 and the working state of the fan 710, the heating device 810 and the damper assembly 730.

[0081] Step S1400: reset the accumulated refrigeration operation time and record the accumulated time of entering the defrost mode.

[0082] It is understandable that, since the compressor 660 is shut down, the refrigeration device stops refrigeration. In order to ensure the statistical accuracy of the cumulative refrigeration operation time, the cumulative refrigeration operation time t1 recorded by the above step S1200 needs to be reset. At the same time, since the refrigeration device enters the defrost mode, in order to ensure the statistical accuracy of the cumulative time entering the defrost mode, it is necessary to record the cumulative time t2 entering the defrost mode. In actual applications, the cumulative refrigeration operation time t1 is reset to zero, and the cumulative time t2 entering the defrost mode can be recorded and counted by a timing device matching the compressor 660, which belongs to the prior art and will not be described here.

[0083] Step S2000: Control the damper assembly to connect the first air duct with the second air duct to form a first circulation air duct, and start the heating device.

[0084] It is understandable that after the compressor 660 stops working, in order to ensure that a defrost space 630 with a temperature higher than that of the freezer chamber 600 but preventing the frost from melting directly can be established between the storage drawer 610 and the door body 620 of the refrigeration equipment, it is necessary to connect the first air duct with the second air duct to form a first circulation air duct, and transmit the heated air to the defrost space 630 through the fan 710 and the heating device 810, and the water vapor after the frost evaporates is transported through the first circulation air duct to the evaporator 720 to re-frost, thereby achieving the effect of removing frost.

[0085] It is understandable that if Figure 1 and 2In the refrigeration device shown, the damper assembly 730 adjusts the first air duct 700 to dock with the second air duct 800 in the defrosting mode to form a first circulation air duct; in addition, the damper assembly 730 is controlled to dock the first air duct 700 with the storage drawer 610 in the refrigeration mode to form a second circulation air duct, so that the compressor 660 and the evaporator 720 can refrigerate the storage drawer 610, thereby improving the refrigeration effect of the refrigeration device. Specifically, the first air duct 700 is provided with a first air vent 740 connected to the air inlet of the second air duct 800 and a second air vent 750 connected to the air inlet of the storage drawer; the damper assembly 730 switches the first air vent 740 and the second air vent 750, so that the first air duct 700 docks with the second air duct 800 and the storage drawer 610 respectively. By setting the first air outlet 740 and the second air outlet 750, it is convenient for the damper assembly 730 to make the first air duct 700 dock with the second air duct 800 and the storage drawer 610 respectively through the switching operation, so as to ensure that the refrigeration device can quickly switch between the defrosting mode and the cooling mode, and ensure the defrosting efficiency of the refrigeration device. In practical applications, the damper assembly 730 can use the structure of the rotary damper to switch the first air outlet 740 and the second air outlet 750, that is, when the damper assembly 730 is in the first position, the damper assembly 730 switches to the first air outlet 740, connects the first air duct 700 with the second air duct 800 and forms a first circulation air duct, at this time, the refrigeration device is in the defrosting mode; when the damper assembly 730 is in the second position, the damper assembly 730 switches to the second air outlet 750, connects the first air duct 700 with the storage drawer 610 and forms a second circulation air duct, at this time, the refrigeration device is in the cooling mode.

[0086] See also Figure 6 , Figure 6 FIG. 5 shows a schematic diagram of a specific implementation process of the above step S2000. Figure 6 As shown, step S2000 at least includes the following steps:

[0087] Step S2100: Start the heating device.

[0088] It is understandable that after controlling the damper assembly to connect the first air duct with the second air duct to form the first circulation air duct, the heating device 810 needs to be started to heat the air entering the second air duct 800. By controlling the opening of the heating device 810, the temperature of the heated air can be controlled, and then the temperature of the defrost space 630 can be accurately controlled to improve the defrosting effect of the refrigeration equipment.

[0089] Step S2200: Control the compressor to stop, and control the fan to run at a preset speed.

[0090] It is understandable that when the refrigeration equipment enters the defrost mode, it is necessary to increase the temperature of the defrost space 630 to evaporate the frost in the freezing chamber 600 through heat exchange. Therefore, it is necessary to control the compressor 660 to stop and start the fan 710 to drive the water vapor formed by the evaporation of the frost to be transmitted to the evaporator 720. Specifically, when the temperature of the freezing chamber is less than or equal to the set temperature and the temperature of the defrost space is less than the first temperature, the fan 710 is controlled to start and run at the maximum speed to accelerate the evaporation and re-condensation of the frost, thereby ensuring the defrosting efficiency of the refrigeration equipment. Among them, controlling the compressor 660 to stop and controlling the fan 710 to start running can be performed through the existing control module, which belongs to the prior art and will not be repeated here.

[0091] Step S3000: When the temperature of the defrost space is greater than the second temperature and the accumulated time of entering the defrost mode is less than the second predetermined time, turn off the heating device, start the compressor and control the damper assembly to connect the first air duct with the storage drawer to form a second circulation air duct. The second temperature is determined according to the ice crystal zone temperature of the items in the freezer and the preset second compensation temperature.

[0092] It is understandable that by real-time monitoring of the temperature Tfd of the defrost space, the temperature Tfd of the defrost space is maintained at a suitable defrosting temperature, and a defrost space 630 with a temperature higher than that of the freezer 600 but preventing frost from directly melting can be established between the storage drawer 610 and the door body 620 of the refrigeration device, so that the frost layer on the front panel 611 of the storage drawer can be evaporated stably and quickly by heat exchange. Therefore, when the temperature Tfd of the defrost space is greater than the second temperature T2, the refrigeration device needs to switch from the defrost mode to the refrigeration mode to reduce the temperature Tfd of the defrost space.

[0093] See also Figure 7 , Figure 7 FIG. 5 shows a schematic diagram of a specific implementation process of the above step S3000. Figure 7 As shown, step S3000 at least includes the following steps:

[0094] Step S3100: Determine the second temperature based on the ice crystal zone temperature of the items in the freezing chamber and a preset second compensation temperature.

[0095] It is understandable that after obtaining the current temperature Tfd of the defrost space 630 by setting a temperature sensor 650 in the defrost space 630, the magnitude relationship between the temperature Tfd of the defrost space 630 and the second temperature T2 can be determined. The second temperature T2 is determined according to the ice crystal zone temperature Tice of the items in the storage drawer and the preset second compensation temperature Δt2. Therefore, it is necessary to adjust the ice crystal zone temperature Tice and the second compensation temperature Δt2 for the items in different storage drawers to ensure that the temperature of the defrost space is less than the second temperature T2, so as to improve the preservation effect of the items, and also prevent the heating device 810 from working for a long time, causing the items in the storage drawer to exceed the ice crystal zone temperature.

[0096] It is understandable that in order to ensure the refrigeration effect of the items in the freezer 600, the temperature Tfd of the defrost space 630 needs to be maintained below the ice crystal zone temperature Tice of the items in the storage drawer in the defrosting mode to achieve the effect of freezing and defrosting. Therefore, in this embodiment, the ice crystal zone temperature Tice of the items in the freezer and the preset second compensation temperature Δt2 are introduced to determine the second temperature T2.

[0097] In practical applications, the first temperature T1 is the sum of the ice crystal zone temperature Tice of the items in the freezer and the first compensation temperature Δt1, and the second temperature T2 is the sum of the ice crystal zone temperature Tice of the items in the freezer and the second compensation temperature Δt2, wherein the first compensation temperature Δt1 and the second compensation temperature Δt2 are both less than or equal to 0, and the first compensation temperature Δt1 is less than the second compensation temperature Δt2, that is, the first temperature T1 and the second temperature T2 satisfy the following formula:

[0098] T1=Tice+Δt1

[0099] T2=Tice+Δt2

[0100] Δt1<Δt2≤0

[0101] Step S3200: When the temperature of the defrost space is greater than the second temperature and the accumulated time of entering the defrost mode is less than the second predetermined time, turn off the heating device, start the compressor and control the damper assembly to connect the first air duct with the storage drawer to form a second circulation air duct.

[0102] It is understandable that in order to ensure the defrosting effect of the refrigeration equipment and avoid excessive frost accumulation on the front panel 611 of the storage drawer, which affects the normal use of the refrigeration equipment, it is also necessary to determine whether to clear the cumulative number of door openings and the cumulative door opening time in the above step S1000 according to the cumulative time t2 of entering the defrost mode, and then refrigerate the freezer 600. That is, when the cumulative time of entering the defrost mode is less than the second predetermined time, the cumulative number of door openings and the cumulative door opening time are not cleared, and the compressor 660 refrigerates according to the set temperature until the temperature of the freezer 600 reaches the set temperature again.

[0103] In actual application, when the temperature Tfd of the defrost space is greater than the second temperature and the accumulated time t2 for entering the defrost mode is less than the second predetermined time, the heating device 810 is turned off, the compressor 660 is started and the damper assembly 730 is controlled to connect the first air duct 700 with the storage drawer 610 to form a second circulation air duct, and the freezer chamber 600 is cooled, and the accumulated time for entering the defrost mode is not reset.

[0104] Step S3300: When the temperature of the circulating air duct is greater than the second temperature and the accumulated time of entering the defrost mode is greater than the second predetermined time, the accumulated time of entering the defrost mode is reset to zero, the heating device is turned off, the compressor is started and the damper assembly is controlled to connect the first air duct with the storage drawer to form a second circulating air duct.

[0105] It is understandable that, consistent with the above step S3200, by real-time monitoring of the temperature Tfd of the defrost space, the temperature Tfd of the defrost space is maintained at a suitable defrosting temperature, and a defrost space 630 with a temperature higher than that of the freezer 600 but preventing the frost from directly melting can be established between the storage drawer 610 and the door body 620 of the refrigeration device. When the temperature Tfd of the defrost space is greater than the second temperature T2, the refrigeration device needs to switch from the defrost mode to the refrigeration mode to reduce the temperature Tfd of the defrost space. At the same time, when the accumulated time of entering the defrost mode is greater than the second predetermined time, the accumulated number of door openings, the accumulated door opening time and the accumulated time of entering the defrost mode are reset, and the compressor 660 performs refrigeration according to the set temperature until the temperature of the freezer 600 reaches the set temperature again.

[0106] It is understandable that the process of turning off the heating device 810, starting the compressor 660 and controlling the damper assembly 730 to dock the first air duct 700 with the storage drawer 610 to form a second circulation air duct and cooling the freezer chamber 600 is consistent with the above step S3200 and will not be repeated here.

[0107] See also Figure 4 , Figure 4 FIG. 2 is a flow chart showing a defrosting control method provided by another embodiment of the second aspect of the present invention. Figure 4 As shown, the defrost control method includes the following steps:

[0108] Step S4000: When the temperature of the freezer compartment is higher than the set temperature, enter the refrigeration mode.

[0109] It is understandable that the temperature of the freezer is monitored in real time so that the temperature of the freezer is maintained at a refrigeration temperature suitable for the items in the storage drawer. Therefore, when the temperature of the freezer is higher than the set temperature, the refrigeration device needs to switch from the refrigeration mode to the defrost mode to lower the temperature of the freezer and ensure the refrigeration effect of the freezer.

[0110] Step S5000: Start the compressor and control the damper assembly to connect the first air duct with the storage drawer to form a second circulation air duct.

[0111] It is understandable that the process of starting the compressor 660 and controlling the damper assembly 730 to dock the first air duct 700 with the storage drawer 610 to form a second circulation air duct and refrigerating the freezer chamber 600 is consistent with the above step S3200 and will not be repeated here.

[0112] Reference Figure 8 The third aspect embodiment of the present invention also provides a refrigeration control device 900, including at least one control processor 910 and a memory 920 for communicating with the at least one control processor 910; the memory 920 stores instructions that can be executed by the at least one control processor 910, and the instructions are executed by the at least one control processor 910 so that the at least one control processor 910 can execute the defrost control method as described above.

[0113] The refrigeration control device provided in accordance with the embodiment of the present invention has at least the following beneficial effects: by arranging a fan and a heating device, a defrost space can be established between the storage drawer and the door body of the refrigeration equipment, the temperature of which is higher than that of the freezer but prevents frost from melting directly, the frost layer on the front panel of the storage drawer is evaporated by heat exchange, and the evaporated water vapor is carried to the low-temperature evaporator by the action of the fan to re-frost, thereby achieving the purpose of frost removal, effectively enhancing the defrost efficiency, shortening the defrost time and reducing the load temperature rise caused by defrosting.

[0114] In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, characterized in that the computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are used to enable a computer to execute the control method of the embodiment of the first aspect.

[0115] The computer-readable storage medium provided in accordance with the embodiment of the present invention has at least the following beneficial effects: by arranging a fan and a heating device, a defrost space can be established between the storage drawer and the door body of the refrigeration equipment, the temperature of which is higher than that of the freezer but prevents frost from melting directly, so that the frost layer on the front panel of the storage drawer can be evaporated by heat exchange, and the evaporated water vapor is carried to the low-temperature evaporator under the action of the fan to re-frost, thereby achieving the purpose of frost removal, effectively enhancing the defrost efficiency, shortening the defrost time and reducing the load temperature rise caused by defrosting.

[0116] It will be appreciated by those skilled in the art that all or some of the steps and systems in the disclosed method above may be implemented as software, firmware, hardware and appropriate combinations thereof. Some physical components or all physical components may be implemented as software executed by a processor, such as a central processing unit, a digital signal processor or a microprocessor, or may be implemented as hardware, or may be implemented as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on a computer-readable medium, which may include a computer storage medium (or a non-transitory medium) and a communication medium (or a temporary medium). As known to those skilled in the art, the term computer storage medium includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules or other data). Computer storage media include, but are not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tapes, disk storage or other magnetic storage devices, or any other medium that may be used to store desired information and may be accessed by a computer. Furthermore, it is well known to those skilled in the art that communication media typically include computer readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media.

[0117] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0118] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A refrigeration device, characterized in that: include: A freezer compartment, the freezer compartment comprising a storage drawer, a defrost space being formed between a front panel of the storage drawer and a door body of the refrigeration device, and a turbulent device for slowing down air flow speed being provided in the defrost space; a first air duct, wherein a fan and an evaporator are disposed in the first air duct; a second air duct, comprising a heating device, wherein at least a portion of the second air duct is connected to the defrost space; The damper assembly is used to adjust the first air duct and the second air duct to connect to form a first circulation air duct in the defrost mode.

2. The refrigeration equipment according to claim 1, characterized in that: The damper assembly is also used to adjust the first air duct to dock with the storage drawer to form a second circulation air duct in the cooling mode.

3. The refrigeration equipment according to claim 2, characterized in that: The first air duct is provided with a first air outlet connected to the air inlet of the second air duct and a second air outlet connected to the air inlet of the storage drawer; the damper assembly switches the first air outlet and the second air outlet so that the first air duct is connected to the second air duct and the storage drawer respectively.

4. The refrigeration equipment according to claim 1, characterized in that: The air outlet of the second air duct is located at the top of the defrost space, and the air inlet of the first air duct is located below the storage drawer.

5. The refrigeration equipment according to claim 1, characterized in that: The surface of the spoiler has at least one of a wave shape, a bow shape, a square shape and a needle shape, or the spoiler includes a flow-circling blade that rotates in a controlled manner.

6. The refrigeration device according to claim 5, characterized in that: The spoiler is mounted on a side of the door body facing the front panel of the storage drawer, or the front panel of the storage drawer forms the spoiler.

7. A defrosting control method, characterized in that: Applicable to the refrigeration equipment according to any one of claims 1 to 6; The defrost control method comprises: When the cumulative refrigeration operation time of the refrigeration device reaches a first predetermined time, the temperature of the freezer compartment is less than or equal to a set temperature and the temperature of the defrost space is less than a first temperature, the defrost mode is entered, and the first temperature is determined according to the ice crystal zone temperature of the items in the storage drawer and a preset first compensation temperature; Controlling the damper assembly to connect the first air duct with the second air duct to form a first circulation air duct, and starting the heating device; When the temperature of the defrost space is greater than the second temperature and the accumulated time of entering the defrost mode is less than the second predetermined time, the heating device is turned off, the compressor is started and the damper assembly is controlled to allow the first air duct to dock with the storage drawer to form a second circulation air duct, and the second temperature is determined based on the ice crystal zone temperature of the items in the freezer and a preset second compensation temperature.

8. The method according to claim 7, characterized in that The method further comprises: When the temperature of the freezing chamber is higher than the set temperature, the freezing mode is entered; The compressor is started and the damper assembly is controlled so that the first air duct is docked with the storage drawer to form a second circulation air duct.

9. The method according to claim 7, characterized in that: After entering the defrost mode, the method includes: The compressor is controlled to stop, and the fan is controlled to run at a preset speed.

10. The method according to claim 7, characterized in that When the cumulative refrigeration operation time of the refrigeration device reaches a first predetermined time, the temperature of the freezing chamber is less than or equal to a set temperature and the temperature of the defrosting space is less than a first temperature, entering a defrosting mode includes: When the cumulative refrigeration operation time of the refrigeration device reaches a first predetermined time, the temperature of the freezer compartment is less than or equal to the set temperature, the temperature of the defrost space is less than a first temperature, and the cumulative number of door openings of the refrigeration device is greater than a preset door opening threshold, the defrost mode is entered; or, When the cumulative refrigeration operation time of the refrigeration equipment reaches a first predetermined time, the temperature of the freezer compartment is less than or equal to the set temperature, the temperature of the defrost space is less than the first temperature and the cumulative door opening time of the refrigeration equipment is greater than a preset time threshold, the defrost mode is entered.

11. The method according to claim 10, characterized in that When entering the defrost mode, the method further comprises: The accumulated refrigeration operation time is reset to zero, and the accumulated time of entering the defrost mode is recorded.

12. The method according to claim 11, characterized in that After starting the heating device, the method further comprises: When the temperature of the defrost space is greater than the second temperature, and the accumulated time of entering the defrost mode is greater than the second predetermined time, the accumulated time of entering the defrost mode is reset to zero, the heating device is turned off, the compressor is started and the damper assembly is controlled to allow the first air duct to dock with the storage drawer to form a second circulation air duct.

13. A defrost control device, characterized in that: It includes at least one control processor and a memory for communicating with the at least one control processor; the memory stores instructions that can be executed by the at least one control processor, and the instructions are executed by the at least one control processor so that the at least one control processor can execute the control method as described in any one of claims 7 to 12.

14. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are used to enable a computer to execute the control method according to any one of claims 7 to 12.

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