Air duct mechanism and refrigeration equipment

Abstract

The utility model relates to the technical field of refrigeration equipment, in particular to an air duct mechanism and refrigeration equipment, the air duct mechanism is applied to the refrigeration equipment, the air duct mechanism comprises a cold air channel and an adjusting assembly, the cold air channel is internally provided with a first cavity, and the first cavity is provided with an air outlet communicating with a compartment and an air inlet communicating with an evaporator mounting chamber; the adjusting assembly comprises a movable baffle movably arranged in the cold air channel, and the movable baffle has a first state for closing the air outlet and / or the air inlet and a second state for opening the air outlet and the air inlet; when the refrigeration equipment operates in the defrosting mode, the movable baffle is in the first state, and the air duct mechanism can effectively solve the problem that hot air enters the chamber in the defrosting process, and consequently the temperature of the chamber rises.

Description

Technical Field

[0001] The present application relates to the technical field of refrigeration equipment, and in particular to an air duct mechanism and refrigeration equipment. Background Art

[0002] Currently, the cold air duct of a typical single-system refrigerator draws air in through the fan and blows it out through the air outlet into the compartment. After cooling the compartment, the air returns to the evaporator installation room through the return air vent. After being cooled by the evaporator, it is then sent back into the compartment through the cold air duct, completing the cycle. Existing refrigerators have a defrosting process that includes pre-cooling, heater defrosting, forced cooling, and normal cooling after defrosting. During pre-cooling, the compressor frequency is increased to increase cooling, lowering the shutdown point by approximately 2°C. The fan and compressor are then stopped, and the heater is turned on for defrosting. After defrosting is complete, to prevent a significant rise in the compartment temperature, the fan is stopped, and the compressor is activated in forced cooling mode to lower the evaporator temperature. Finally, the fan is turned on for normal cooling. During the defrosting process, the heater heats the evaporator and the air in the cold air duct. Some of this hot air overflows into the compartment through the air outlet, affecting the compartment temperature.

[0003] Existing Chinese patent No. 201610134046.1 discloses a refrigerator and a split air supply device therefor, comprising a housing with an air inlet and multiple air outlets; an adjusting member rotatably disposed within the housing to fully, partially, or fully expose each air outlet at different rotational positions, thereby adjusting the air outlet area of each of the multiple air outlets. However, this device does not address the problem of hot air entering the compartment during defrosting, causing the compartment temperature to rise. Utility Model Content

[0004] The present application provides an air duct mechanism and a refrigeration device, which can effectively prevent the problem of hot air entering the compartment during the defrosting process and causing the compartment temperature to rise.

[0005] In the first aspect, the present application provides an air duct mechanism, which is applied to a refrigeration device, and the air duct mechanism includes: a cold air channel, a first chamber is provided in the cold air channel, the first chamber has an air outlet connected to the compartment and an air inlet connected to the evaporator installation chamber; and an adjustment component, the adjustment component includes a movable baffle movably arranged in the cold air channel, the movable baffle includes a first state of closing the air outlet and / or the air inlet and a second state of opening the air outlet and the air inlet; wherein, when the refrigeration device operates in the defrost mode, the movable baffle is in the first state.

[0006] In a possible implementation, the movable baffle is slidably disposed in the cold air passage; or the movable baffle is rotatably disposed in the cold air passage.

[0007] In one possible implementation, a wind shield and a connecting hole are provided on the movable baffle. When the movable baffle is in a first state, the wind shield closes the air outlet and / or the air inlet; when the movable baffle is in a second state, the connecting hole connects the air outlet and / or the air inlet.

[0008] In one possible implementation, a return air outlet is provided between the compartment and the evaporator installation chamber, and the adjustment assembly further includes a return air baffle connected to the movable baffle; when the movable baffle is in a first state, the return air baffle closes the return air outlet; when the movable baffle is in a second state, the return air baffle opens the return air outlet.

[0009] In a possible implementation, the movable baffle further includes a third state of closing part of the air outlet. When the movable baffle is in the third state, the return air baffle opens the return air outlet.

[0010] In a possible implementation, the air outlets include at least two groups spaced apart along the first direction, and each group of air outlets is controlled by an adjustment component.

[0011] In a possible implementation, an air guide portion is provided in the cold air channel, and the air guide portion is used to guide the gas in the first chamber to the air outlet.

[0012] In one possible implementation, a second chamber is provided in the cold air channel, the second chamber has a first air outlet connected to the first chamber and a second air outlet connected to the evaporator installation chamber, and a first baffle is provided on the movable baffle. When the movable baffle is in the first state, the first baffle opens the first air outlet, and when the movable baffle is in the second state or the third state, the first baffle closes the first air outlet.

[0013] In one possible implementation, the cold air duct includes an air duct seat and an air duct cover, the air inlet is arranged on the air duct seat, the air outlet is arranged on the air duct cover, the air duct seat is provided with an air guide portion, and a second chamber is formed between the air guide portion and the air duct cover.

[0014] In a possible implementation, the adjustment assembly further includes a driving member configured to drive the movable baffle to switch between the first state and the second state.

[0015] In a possible implementation, the movable baffle is slidably disposed in the cold air channel, and the driving component includes: a rack disposed on the movable baffle; and a motor, wherein a gear is disposed at a power output end of the motor, and the gear is meshed with the rack.

[0016] In a second aspect, an embodiment of the present application provides a refrigeration device, comprising: a box body having a compartment and an evaporator installation chamber; an evaporator and a heater, which are arranged in the evaporator installation chamber; and the above-mentioned air duct mechanism.

[0017] On the third aspect, an embodiment of the present application provides a defrost control method for the above-mentioned refrigeration equipment, including: defrost judgment: judging whether the refrigeration equipment is running in defrost mode; air duct adjustment: when the refrigeration equipment starts to run in defrost mode, the air inlet and / or air outlet is blocked by the adjustment component of the air duct mechanism; defrost: stop the fan and compressor, start the heater to defrost the evaporator; strong cooling: turn off the heater, start the compressor to cool the evaporator.

[0018] In one possible implementation, a return air outlet is provided between the compartment and the evaporator installation chamber, and the adjustment component of the air duct mechanism includes a movable baffle and a return air baffle connected to the movable baffle, the movable baffle is used to open and close the air outlet, and the return air baffle is used to open and close the return air outlet; the air duct adjustment step also includes: closing the return air outlet by the return air baffle.

[0019] In one possible implementation, a second chamber is provided in the cold air channel of the air duct mechanism, the second chamber has a first air outlet connected to the cold air channel and a second air outlet connected to the evaporator installation chamber, and a first baffle for opening and closing the first air outlet is provided on the movable baffle; the air duct adjustment step also includes: opening the first air outlet through the first baffle; the forced cooling step also includes: turning on the fan to form a circulating air path between the evaporator installation chamber, the cold air channel and the second chamber.

[0020] In one possible implementation, the defrost control method further includes: obtaining the temperature in the cold air channel; when running the defrost step, when the temperature in the cold air channel rises to a first preset value, switching to the strong cooling step; when running the strong cooling step, when the temperature in the cold air channel drops to a second preset value, switching to the defrost step; the defrost step and the strong cooling cycle are performed until the defrosting of the evaporator is completely completed.

[0021] The above technical solution provided by the embodiment of the present application has the following advantages compared with the prior art:

[0022] The air duct mechanism and refrigeration device provided in the embodiments of the present application are characterized in that the air duct mechanism switches the movable baffle of the adjustment component to the first state, thereby closing the air inlet, thereby isolating the evaporator installation room from the first chamber, or closing the air outlet, thereby isolating the compartment from the first chamber, so that hot air during defrosting does not enter the compartment through the air outlet, which can effectively avoid the problem of hot air entering the compartment during the defrosting process and causing the compartment temperature to rise. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0025] One or more embodiments are exemplarily illustrated by pictures in the corresponding drawings. These exemplifications do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements. Unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0026] Figure 1 A schematic structural diagram of an air duct mechanism provided in an embodiment of the present application when the movable baffle is in the second state;

[0027] Figure 2 A schematic side view of the structure of an air duct mechanism, a compartment, and an evaporator installation chamber provided in an embodiment of the present application;

[0028] Figure 3 A schematic structural diagram of an air duct mechanism provided in an embodiment of the present application when the movable baffle is in a first state;

[0029] Figure 4 A schematic structural diagram of a movable baffle, a first baffle, and a rack provided in an embodiment of the present application;

[0030] Figure 5 A schematic diagram of the gas flow direction of an air duct mechanism during forced cooling provided in an embodiment of the present application;

[0031] Figure 6 for Figure 5 A local enlarged structural diagram of point A;

[0032] Figure 7 A schematic diagram illustrating the gas flow direction of an air duct mechanism during normal cooling provided by an embodiment of the present application;

[0033] Figure 8 A flowchart of a defrost control method for refrigeration equipment provided in an embodiment of the present application;

[0034] Figure 9 This is a schematic diagram of the structure of an air duct mechanism in the prior art;

[0035] Figure 10 This is a temperature change diagram when a refrigerator performs defrosting in the prior art.

[0036] Description of reference numerals:

[0037] X, first direction;

[0038] 1. Cold air duct; 11. Air outlet; 12. Air inlet; 13. Air guide; 14. Second chamber; 15. First air outlet; 16. Second air outlet; 17. Air duct seat; 18. Air duct cover;

[0039] 2. Adjustment assembly; 21. Movable baffle; 211. Wind shield; 212. Communication hole; 22. Return air baffle; 23. First baffle; 24. Driving member; 241. Rack; 242. Motor;

[0040] 3. Compartment; 4. Evaporator installation room; 5. Return air outlet; 6. Evaporator; 7. Heater. DETAILED DESCRIPTION

[0041] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0042] The disclosure below provides many different embodiments or examples for implementing different configurations of the present invention. To simplify the disclosure of the present invention, the components and configurations of specific examples are described below. Of course, these are merely examples and are not intended to limit the present invention. In addition, the present invention may repeat reference numerals and / or letters in different examples. Such repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or configurations discussed.

[0043] For ease of description, spatially relative terms may be used herein to describe the relative position or movement of one element or feature relative to another element or feature as shown in the figures, such as "inside," "outside," "inside," "outside," "below," "beneath," "above," "above," "front," "back," and the like. Such spatially relative terms are intended to include different orientations of the device in use or operation other than the orientation depicted in the figures. For example, if the device in the figures undergoes a positional flip or a change in posture or a change in motion, then these directional indications will also change accordingly. For example, an element described as "below" or "below" another element or feature will subsequently be oriented as "above" or "above" another element or feature. Thus, the example term "below" can include both above and below orientations. The device may be oriented otherwise (rotated 90 degrees or in other orientations) and the spatially relative descriptors used herein will be interpreted accordingly.

[0044] like Figure 1-Figure 7 As shown, an embodiment of the present application provides an air duct mechanism applied to refrigeration equipment, and the air duct mechanism includes a cold air channel 1 and an adjustment component 2.

[0045] A first chamber 19 is provided in the cold air duct 1, and the first chamber 19 has an air outlet 11 connected to the compartment 3 and an air inlet 12 connected to the evaporator installation chamber 4. Specifically, the compartment 3 is used to store refrigerated items, the evaporator installation chamber 4 is equipped with an evaporator 6, and the cold air duct 1 is provided between the compartment 3 and the evaporator installation chamber 4.

[0046] The adjustment component 2 includes a movable baffle 21 movably arranged in the cold air channel 1. The movable baffle 21 includes a first state of closing the air outlet 11 and / or the air inlet 12 and a second state of opening the air outlet 11 and the air inlet 12.

[0047] When the refrigeration device operates in the defrost mode, the movable baffle 21 is in the first state.

[0048] In this application, if Figure 3 As shown, by switching the movable baffle 21 of the adjustment component 2 to the first state, the air inlet 12 is closed, thereby isolating the evaporator installation chamber 4 from the first chamber 19, or the air outlet 11 is closed, thereby isolating the compartment 3 from the first chamber 19, so that the hot air during defrosting will not enter the compartment 3 through the air outlet 11, which can effectively avoid the problem of hot air entering the compartment 3 and causing the temperature of the compartment 3 to rise during the defrosting process. Specifically, the movable baffle 21 can isolate the evaporator installation chamber 4 from the first chamber 19 by closing the air inlet 12, or isolate the first chamber 19 from the compartment 3 by closing the air outlet 11, or can simultaneously close the air inlet 12 and the air outlet 11, so that the hot air in the evaporator installation chamber 4 can enter the compartment 3. Preferably, the movable baffle 21 in the present application opens and closes the air outlet 11, that is, when the movable baffle 21 is in the first state, the air outlet 11 is in a closed state, and when the movable baffle 21 is in the second state, the air outlet 11 is in an open state. In this way, during defrosting, hot air can also enter the cold air channel 1 through the air inlet 12, thereby defrosting the inside of the cold air channel 1.

[0049] Specifically, such as Figure 1 As shown, when the refrigeration equipment is running in the conventional refrigeration mode, the movable baffle 21 of the adjustment component 2 is switched to the second state. At this time, the air outlet 11 and the air inlet 12 are both in the open state. The fan is installed at the air inlet 12 of the cold air duct 1, and the cooled gas in the evaporator installation room 4 is pumped into the cold air duct 1, and then sent to the compartment 3 through the air outlet 11, thereby cooling the compartment 3.

[0050] like Figure 9-10As shown, in the related art, when the existing refrigerator is defrosting, the fan and the compressor are stopped, and the heater 7 is turned on. The heater 7 is located below the evaporator 6 and defrosts the evaporator 6 and the inside of the cold air duct 1 by heat radiation. Although the fan is stopped, the hot air rises and the pressure increases, and it will overflow into the compartment 3 through the air outlet 11, thereby causing the temperature of the compartment 3 to rise, resulting in temperature fluctuations and affecting the energy consumption of the entire machine.

[0051] In the present application, the air inlet 12 and / or the air outlet 11 can be closed by adjusting the movable baffle 21 of the component 2, so that the hot air during defrosting will not enter the compartment 3 through the air outlet 11, thereby avoiding affecting the temperature of the compartment 3, avoiding temperature fluctuations in the compartment 3, and reducing the energy consumption of the entire machine.

[0052] In some embodiments, the movable baffle 21 is slidably disposed in the cold air passage 1 ; or the movable baffle 21 is rotatably disposed in the cold air passage 1 .

[0053] In the present application, the movable baffle 21 can switch between the first state and the second state by sliding, and can also switch between the first state and the second state by rotating around a center point. As long as the compartment 3 can be connected to the evaporator installation chamber 4 during cooling and isolated from the evaporator installation chamber 4 during defrosting, it will be sufficient.

[0054] like Figure 4 As shown, in some embodiments, a wind shield portion 211 and a connecting hole 212 are provided on the movable baffle 21. When the movable baffle 21 is in a first state, the wind shield portion 211 closes the air outlet 11 and / or the air inlet 12; when the movable baffle 21 is in a second state, the connecting hole 212 connects the air outlet 11 or the air inlet 12.

[0055] In the present application, the wind shield 211 is used to close the air outlet 11 or the air inlet 12 , and the connecting hole 212 is used to connect the air inlet 12 or the air outlet 11 .

[0056] In a specific embodiment, the air inlet 12 is always in an open state. When the movable baffle 21 is in the first state, the wind shield 211 closes the air outlet 11. When the movable baffle 21 is in the first state, the connecting hole 212 is connected with the air outlet 11 to realize the opening of the air outlet 11. By arranging the wind shield 211 and the connecting hole 212 on the movable baffle 21, multiple wind shields 211 can be arranged on one movable baffle 21. The multiple wind shields 211 are respectively used to close the multiple air outlets 11. The multiple wind shields 211 are respectively provided with connecting holes 212. When the connecting hole 212 is connected with the air outlet 11, the air outlet 11 is opened, which is convenient for controlling the multiple air outlets 11.

[0057] like Figure 1 、3 As shown in Figures 5 and 7, in some embodiments, a return air outlet 5 is provided between the compartment 3 and the evaporator installation chamber 4, and the adjustment component 2 further includes a return air baffle 22 connected to the movable baffle 21; when the movable baffle 21 is in the first state, the return air baffle 22 closes the return air outlet 5; when the movable baffle 21 is in the second state, the return air baffle 22 opens the return air outlet 5.

[0058] In the present application, the return air inlet 5 is generally arranged at the bottom of the compartment 3. Although it is connected to the evaporator installation chamber 4, the hot air is generally concentrated at the top. Therefore, the amount of hot air entering the compartment 3 through the return air inlet 5 is very small and will not have a significant impact on the temperature of the compartment 3. The present application closes the return air inlet 5 by the return air baffle 22. That is, when the movable baffle 21 is in the first state, the return air baffle 22 also closes the return air inlet 5. At this time, the compartment 3 is fully isolated from the evaporator installation chamber 4, which can fully prevent the hot air from entering the compartment 3 during defrosting, and further reduce the impact of the hot air on the temperature of the compartment 3 during defrosting.

[0059] In some embodiments, the movable baffle 21 further includes a third state of closing a portion of the air outlet 11 . When the movable baffle 21 is in the third state, the return air baffle 22 opens the return air outlet 5 .

[0060] In the present application, when the movable baffle 21 is in the third state, part of the air outlet 11 is closed. Specifically, the movable baffle 21 has multiple wind shields 211, each wind shield 211 corresponding to an air outlet 11. The aforementioned closed part of the air outlet 11 can be a partial wind shield 211 that closes part of the air outlet 11, while the remaining air outlets 11 remain open. Alternatively, each wind shield 211 can close a portion of an air outlet 11, so that only a portion of each air outlet 11 is open. This allows the air volume to be adjusted. At this time, the return air outlet 5 is still open, allowing the air volume to be adjusted during the cooling process.

[0061] Specifically, the movable baffle 21 closes the air outlet 11 in the first state, and the return air baffle 22 closes the return air outlet 5 at this time; when the movable baffle 21 moves to the second state, part of the air outlet 11 is opened, and the return air baffle 22 opens the return air outlet 5 at this time, but the return air outlet 5 is not fully opened, thereby controlling the air volume and wind speed; when the movable baffle 21 switches to the second state, all the air outlets 11 are opened and the return air outlet 5 is fully opened.

[0062] In some embodiments, the air outlets 11 include at least two groups spaced apart along the first direction X, and each group of air outlets 11 is controlled by one adjustment component 2 .

[0063] In the present application, the first direction X can be a horizontal direction, a vertical direction, or other directions. Each group of air outlets 11 corresponds to a return air outlet 5, and a circulating air duct is formed through the return air outlet 5, the evaporator installation chamber 4, and the cold air duct 1. An adjustment component 2 can simultaneously control a group of air outlets 11 and a return air outlet 5, thereby adjusting the wind speed and air volume of the circulating air duct, and adjusting the wind speed and air volume along the first direction X in the compartment 3, thereby achieving independent air supply and temperature control for different areas along the first direction X in the compartment 3, thereby improving the uniformity of temperature distribution in the compartment 3.

[0064] In the related art, the existing refrigerator supplies air through a fan that sucks in air and then blows it out from multiple air outlets 11. Under different scenarios, such as changes in external ambient temperature, changes in fan speed, adjustment of compressor frequency, different thickness of frost layer on evaporator 6, etc., the air outlet 11 will be fixed and cannot be adjusted, which may easily cause uneven temperature distribution in compartment 3.

[0065] Specifically, in this application, two sets of air outlets 11 are provided, and the two air outlets 11 are respectively located on the left and right sides of the compartment 3. The two return air vents 5 are respectively located below the two sets of air outlets 11. Temperature sensing packages are respectively provided on the left and right sides of the compartment 3 to detect the temperature of the left and right areas of the compartment 3 respectively. When the temperature on one side is detected to be too high, the air supply volume on that side can be appropriately increased; when the temperature on one side is detected to be too low, the air supply volume on that side can be appropriately reduced. In this way, the air intake and cooling capacity of the compartment 3 can be adjusted as needed, making the temperature more uniform.

[0066] like Figure 1 As shown, in some embodiments, an air guide portion 13 is provided in the cold air channel 1 , and the air guide portion 13 is used to guide the gas in the first chamber 19 to the air outlet 11 .

[0067] In the present application, the air in the first chamber 19 can be guided by the air guide portion 13 to the air outlet 11, thereby avoiding the problem of low wind speed and air volume caused by wind divergence, thereby ensuring the air volume.

[0068] Specifically, the air guide portion 13 is located below the air inlet 12 and is a semicircular area for guiding the downward airflow to the air outlets 11 on both sides.

[0069] like Figure 5-7As shown, in some embodiments, a second chamber 14 is provided in the cold air channel 1, the second chamber 14 has a first air outlet 15 connected to the first chamber 19 and a second air outlet 16 connected to the evaporator installation chamber 4, and a first baffle 23 is provided on the movable baffle 21. When the movable baffle 21 is in the first state, the first baffle 23 opens the first air outlet 15, and when the movable baffle 21 is in the second state or the third state, the first baffle 23 closes the first air outlet 15.

[0070] In the present application, the second chamber 14 is connected to the first chamber 19 only through the first air outlet 15. When the movable baffle 21 is in the second state or the third state, the first baffle 23 closes the first air outlet 15, which is used for normal cooling of the refrigeration equipment. The cold air in the first chamber 19 enters the compartment 3 through the air outlet 11, and then returns to the evaporator installation room 4 through the return air outlet 5. After being cooled by the evaporator 6, it enters the first chamber 19 again to realize circulation. When the refrigeration equipment is in the defrost mode, the movable baffle 21 is in the first state. At this time, the first baffle 23 opens the first air outlet 15, and a small amount of hot air in the first chamber 19 enters the second chamber 14 through the first air outlet 15. When strong cooling is performed after defrosting, the compressor is started to the strong cooling mode, and the fan can be turned on. The fan drives the air in the evaporator installation chamber 4 into the first chamber 19, and then enters the second chamber 14 through the first air outlet 15 and returns to the evaporator installation chamber 4 through the second air outlet 16, forming a cycle, which can quickly cool the air in the evaporator installation chamber 4 and the first chamber 19 to prevent heat from radiating into the compartment 3.

[0071] In the related art, when the existing refrigerator is defrosting, the evaporator 6 is heated and defrosted by the heater 7, and then the heater 7 is turned off and the compressor is started to the strong cooling mode. Because the gas in the cold air channel 1 is hot air at this time, the evaporator 6 needs to cool itself down and then radiate the cold energy to cool the gas in the first chamber 19 and the evaporator installation chamber 4 in the form of radiation, which takes a long time; if the fan is started, the hot air will be blown directly into the compartment 3, causing the compartment 3 to heat up, which has a greater impact on the temperature rise under the super freezing mode, such as the -38°C requirement.

[0072] In the embodiment of the present application, during defrosting, the first air vent 15 is opened through the first baffle 23, and a small amount of hot air will enter the second chamber 14 through the first air vent 15, but it will only gather in the second chamber 14 and will not enter the compartment 3. When forced cooling is performed after defrosting, the compressor starts the evaporator 6 to cool down. At this time, the movable baffle 21 still closes the air outlet 11, the fan is started, and the gas in the evaporator installation chamber 4 enters the freezing compartment 3 through the air inlet 12, and then enters the second chamber 14 through the first air vent 15, and then returns to the evaporator installation chamber 4 through the second air vent 16, forming a cycle. The secondary cycle does not pass through the compartment 3, so it will not affect the temperature of the compartment 3. At the same time, the temperature of the first chamber 19 and the evaporator installation chamber 4 can be quickly reduced to a low temperature, shortening the duration of forced cooling.

[0073] Specifically, the present application integrates the first baffle 23 on the movable baffle 21. When the movable baffle 21 moves to the first state, the first baffle 23 automatically opens the first air outlet 15. When the movable baffle 21 moves to the second state or the third state, the first baffle 23 automatically closes the first air outlet 15. Only one set of drives is needed to complete the adjustment of the movable baffle 21, the return air baffle 22 and the first baffle 23, and the structure is simpler.

[0074] Optionally, the first baffle 23 can also be controlled individually, that is, when strong cooling is required, the first baffle 23 is controlled individually to open the first air outlet 15. In other modes, the first baffle 23 is controlled to close the first air outlet 15.

[0075] like Figure 2 、 5 As shown in Figure 7, in some embodiments, the cold air duct 1 includes an air duct seat 17 and an air duct cover 18, the air inlet 12 is arranged on the air duct seat 17, the air outlet 11 is arranged on the air duct cover 18, and an air guide portion 13 is provided on the air duct seat 17, and a second chamber 14 is formed between the air guide portion 13 and the air duct cover 18.

[0076] In the present application, the cold air duct 1 is enclosed by the duct seat 17 and the duct cover 18. The fan is installed at the air inlet 12 to suck the gas in the evaporator installation room 4 into the first chamber 19, and then send it to the compartment 3 through the air outlet 11 on the duct cover 18. The air guide 13 is set on the duct seat 17, and the first air outlet 15 is set on the air guide 13. If the first air outlet 15 is set on the duct seat 17, it will cause the air path to be short-circuited, so that the gas in the evaporator installation room 4 directly enters the second chamber 14, and it is difficult to ensure that circulating wind can be formed to quickly cool the air in the first chamber 19 during strong cooling. Because the evaporator 6 and the duct seat 17 are tightly fitted, the return air can go up from the gap between the fins of the evaporator 6. If they are not tightly fitted and there is a gap, the wind will go up from the gap and cannot be cooled without passing through the evaporator 6.

[0077] In some embodiments, the adjustment assembly 2 further includes a driving member 24 , and the driving member 24 is used to drive the movable baffle 21 to switch between the first state and the second state.

[0078] In the present application, the movable baffle 21 can be adjusted manually and switched between multiple states. The movable baffle 21 can also be driven by the driving member 24. When in defrost mode, the driving member 24 is automatically controlled by the main board to complete the adjustment of the movable baffle 21 without manual operation, thereby improving the user experience.

[0079] like Figure 1 As shown, in some embodiments, the movable baffle 21 is slidably disposed in the cold air channel 1, and the driving member 24 includes: a rack 241, which is disposed on the movable baffle 21; and a motor 242, and a gear is disposed at the power output end of the motor 242, and the gear is engaged with the rack 241.

[0080] In the present application, the movable baffle 21 slides within the cold air duct 1. Specifically, the movable baffle 21 slides in the vertical direction. A guide member is also provided within the cold air duct 1 to guide the movable baffle 21, ensuring that the movable baffle 21 can only slide in the vertical direction. The guide member has a guide post that engages with a bar-shaped hole on the movable baffle 21. When adjusting the movable baffle 21, the motor 242 drives the gear to rotate, and the gear drives the rack 241 to move in the vertical direction. The rack 241 drives the movable baffle 21 to slide in the vertical direction. The motor 242 is a stepper motor 242, which can precisely control the movement of the movable baffle 21.

[0081] Optionally, the driving member 24 in the present application may also be other linear driving mechanisms, such as an electric push rod or a telescopic screw structure, etc., which is not limited here.

[0082] The air duct mechanism switches the movable baffle 21 of the adjustment component 2 to the first state, closing the air inlet 12, thereby isolating the evaporator installation chamber 4 from the cold air channel 1, or closing the air outlet 11, thereby isolating the compartment 3 from the cold air channel 1, so that the hot air during defrosting will not enter the compartment 3 through the air outlet 11, which can effectively avoid the problem of hot air entering the compartment 3 during the defrosting process and causing the temperature of the compartment 3 to rise.

[0083] An embodiment of the present application provides a refrigeration device, comprising: a box body having a compartment 3 and an evaporator installation chamber 4; an evaporator 6 and a heater 7, which are arranged in the evaporator installation chamber 4; and the above-mentioned air duct mechanism.

[0084] Specifically, the refrigeration device in the present application is a refrigerator. When the refrigeration mode is running, the regulating component 2 of the air duct mechanism opens both the air inlet 12 and the air outlet 11. Under the action of the fan, the gas in the evaporator installation chamber 4 is pumped into the first chamber 19, and then blown out into the compartment 3 through the air outlet 11 to achieve refrigeration of the compartment 3; when the defrost mode is running, the air inlet 12 and / or the air outlet 11 is closed by the regulating component 2, so that the hot air will not enter the compartment 3 during defrosting and affect the temperature of the compartment 3, thereby avoiding the problem of temperature rise in the compartment 3 during the defrosting process.

[0085] like Figure 10 As shown in the figure, in the related art, conventional refrigerators have a defrosting process that includes pre-cooling, heater defrosting, forced cooling, and normal cooling after defrosting. During pre-cooling, the compressor frequency is increased to increase cooling, and the shutdown point drops by about 2°C. The fan and compressor are then stopped, and the heater is turned on to defrost. After defrosting is complete, to avoid a significant rise in room temperature, the fan is stopped and the compressor is activated in forced cooling mode to lower the evaporator temperature. Finally, the fan is turned on to resume normal cooling.

[0086] Figure 8 A flowchart of a defrost control method for refrigeration equipment provided in an embodiment of the present application.

[0087] like Figure 8 As shown, the embodiment of the present application provides a defrost control method for the above-mentioned refrigeration equipment, including:

[0088] S1. Defrosting judgment: judging whether the refrigeration equipment is running in defrosting mode;

[0089] S2. Air duct adjustment: When the refrigeration equipment starts to operate in defrost mode, the air inlet 12 and / or the air outlet 11 are blocked by the adjustment component 2 of the air duct mechanism;

[0090] S3, defrosting: stop the fan and compressor, start the heater 7 to defrost the evaporator 6;

[0091] S4, forced cooling: turn off the heater 7 and start the compressor to cool the evaporator 6.

[0092] In this application, it is first determined whether the refrigerator is running in the defrost mode. Before running the defrost mode, the air duct adjustment step is performed to isolate the compartment 3 from the evaporator installation chamber 4. Then, the evaporator 6 is heated and defrosted by the heater 7 to prevent hot air from entering the compartment 3 during the defrost process. Then, the evaporator 6 is cooled by strong cooling, and the cooling of the evaporator installation chamber 4 and the cold air duct 1 is completed at the same time. After defrosting, the conventional refrigeration mode can be performed.

[0093] Specifically, the present application isolates the evaporator installation chamber 4 and the compartment 3 during defrosting so that hot air does not enter the compartment 3, thereby eliminating the pre-cooling stage in the prior art.

[0094] In some embodiments, a return air vent 5 is provided between the compartment 3 and the evaporator installation chamber 4. The regulating assembly 2 of the air duct mechanism includes a movable baffle 21 and a return air baffle 22 connected to the movable baffle 21. The movable baffle 21 is used to open and close the air outlet 11, and the return air baffle 22 is used to open and close the return air vent 5.

[0095] The steps of air duct adjustment also include:

[0096] S21 , closing the return air port 5 by the return air baffle 22 .

[0097] In this application, before defrosting, the return air port 5 is closed by the return air baffle 22, which can effectively prevent the hot air in the cold air channel 1 from overflowing into the compartment 3 through the return air port 5, further reducing the impact of the hot air on the temperature of the compartment 3 during defrosting.

[0098] In some embodiments, a second chamber 14 is provided in the cold air channel 1 of the air duct mechanism. The second chamber 14 has a first air outlet 15 communicating with the cold air channel 1 and a second air outlet 16 communicating with the evaporator installation chamber 4. A first baffle 23 for opening and closing the first air outlet 15 is provided on the movable baffle 21.

[0099] The steps of air duct adjustment also include:

[0100] S22, opening the first air outlet 15 through the first baffle 23;

[0101] The steps of strong cooling also include:

[0102] S41 , turning on the fan to form a circulating air path between the evaporator installation chamber 4 , the cold air duct 1 and the second chamber 14 .

[0103] In the present application, the first air outlet 15 is opened through the first baffle 23. When strong cooling is required after defrosting, the fan can be turned on to allow the gas in the evaporator installation chamber 4 to enter the cold air channel 1 through the air inlet 12, and then enter the second chamber 14 through the first air outlet 15, and then return to the evaporator installation chamber 4 through the second air outlet 16 to realize circulation, thereby quickly cooling the gas in the freezer compartment 3, shortening the entire defrosting time, and reducing energy consumption.

[0104] In some embodiments, the defrost control method further includes:

[0105] S5. Obtain the temperature in the cold air channel 1;

[0106] When the defrost step is running, when the temperature in the cold air channel 1 rises to a first preset value, it switches to the strong cooling step; when the strong cooling step is running, when the temperature in the cold air channel 1 drops to a second preset value, it switches to the defrost step; the defrost step and the strong cooling cycle are performed until the defrosting of the evaporator 6 is completely completed.

[0107] In the related art, when defrosting, the heater 7 is put into operation for too long during the entire defrosting process. Generally, the defrosting heating time is greater than 40 minutes. The hot air not only enters the compartment 3 through the air outlet 11, but also transfers the heat to the cold air channel 1 in the form of thermal radiation, and then conducts it to the compartment 3 through the air duct cover 18, thereby causing the problem of temperature rise in the compartment 3.

[0108] In order to avoid the heat from being transferred to the compartment 3 in the form of radiation during the defrosting process, the temperature in the first chamber 19 is detected in the present application. When the heater 7 is working during defrosting, the temperature in the first chamber 19 will rise. When the temperature rises to a first preset value, the defrosting step is suspended, and the strong cooling step is started. When the strong cooling step is turned on, the fan is turned on to achieve rapid cooling of the inside of the first chamber 19. When the temperature in the cold air channel 1 drops to a second preset value, the strong cooling step is suspended and the defrosting step is started until the entire defrosting is completed. By dividing a defrosting process into multiple times, and cooling the first chamber 19 each time, it is avoided that the temperature in the first chamber 19 is too high due to continuous heating and heat radiation to the compartment 3, thereby further improving the temperature control effect and further reducing the temperature rise problem caused to the compartment 3 during defrosting.

[0109] Specifically, the defrost mode in the present application can be divided into three times, and each heating only takes 15 minutes, so that the temperature in the cold air channel 1 is controlled below the first preset value, and the heat radiation of high temperature to the compartment 3 is reduced as much as possible.

[0110] It should be understood that the terms used herein are for the purpose of describing specific example embodiments only and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "comprise", "include", "contain" and "have" are inclusive and therefore specify the presence of stated features, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring them to be performed in the specific order described or illustrated, unless the order of execution is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0111] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates otherwise, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0112] The foregoing description is intended only to provide specific embodiments of the present invention, which will enable those skilled in the art to understand and implement the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not intended to be limited to the embodiments shown herein, but is intended to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. An air duct mechanism, applied to refrigeration equipment, characterized in that: The air duct mechanism comprises: A cold air channel (1), wherein a first chamber (19) is provided inside the cold air channel (1), and the first chamber (19) has an air outlet (11) communicating with the compartment (3) and an air inlet (12) communicating with the evaporator installation chamber (4); and An adjusting component (2), the adjusting component (2) comprising a movable baffle (21) movably arranged in the cold air channel (1), the movable baffle (21) comprising a first state of closing the air outlet (11) and / or the air inlet (12) and a second state of opening the air outlet (11) and the air inlet (12); Wherein, when the refrigeration equipment operates in a defrost mode, the movable baffle (21) is in the first state.

2. The air duct mechanism according to claim 1, characterized in that: The movable baffle (21) is slidably arranged in the cold air channel (1); or The movable baffle (21) is rotatably disposed in the cold air channel (1).

3. The air duct mechanism according to claim 1, characterized in that: The movable baffle (21) is provided with a wind shield portion (211) and a communication hole (212); when the movable baffle (21) is in the first state, the wind shield portion (211) closes the air outlet (11) and / or the air inlet (12); when the movable baffle (21) is in the second state, the communication hole (212) is connected to the air outlet (11) or the air inlet (12).

4. The air duct mechanism according to claim 1, characterized in that: A return air port (5) is provided between the compartment (3) and the evaporator installation chamber (4), and the regulating assembly (2) further comprises a return air baffle (22) connected to the movable baffle (21); When the movable baffle (21) is in the first state, the return air baffle (22) closes the return air port (5); When the movable baffle (21) is in the second state, the return air baffle (22) opens the return air port (5).

5. The air duct mechanism according to claim 4, characterized in that: The movable baffle (21) also includes a third state for closing a portion of the air outlet (11). When the movable baffle (21) is in the third state, the return air baffle (22) opens the return air outlet (5).

6. The air duct mechanism according to claim 5, characterized in that: The air outlets (11) comprise at least two groups spaced apart along a first direction, and each group of the air outlets (11) is controlled by one of the regulating components (2).

7. The air duct mechanism according to claim 5, characterized in that: An air guide portion (13) is provided in the cold air channel (1), and the air guide portion (13) is used to guide the gas in the first chamber (19) to the air outlet (11).

8. The air duct mechanism according to claim 7, characterized in that: A second chamber (14) is provided in the cold air channel (1), and the second chamber (14) has a first air outlet (15) connected to the cold air channel (1) and a second air outlet (16) connected to the evaporator installation chamber (4). A first baffle (23) is provided on the movable baffle (21). When the movable baffle (21) is in the first state, the first baffle (23) opens the first air outlet (15); when the movable baffle (21) is in the second state or the third state, the first baffle (23) closes the first air outlet (15).

9. The air duct mechanism according to claim 8, characterized in that: The cold air channel (1) includes an air duct seat (17) and an air duct cover (18), the air inlet (12) is arranged on the air duct seat (17), the air outlet (11) is arranged on the air duct cover (18), the air guide portion (13) is arranged on the air duct seat (17), and the second chamber (14) is formed between the air guide portion (13) and the air duct cover (18).

10. The air duct mechanism according to claim 1, characterized in that: The adjustment assembly (2) further comprises a driving member (24), and the driving member (24) is used to drive the movable baffle (21) to switch between the first state and the second state.

11. The air duct mechanism according to claim 10, characterized in that: The movable baffle (21) is slidably disposed in the cold air channel (1), and the driving member (24) comprises: a rack (241) disposed on the movable baffle (21); and A motor (242) is provided at a power output end of the motor (242), and the gear is meshed with the rack (241).

12. A refrigeration device, characterized in that: include: A box body, the box body having a compartment (3) and an evaporator installation chamber (4); An evaporator (6) and a heater (7) are arranged in the evaporator installation chamber (4); and The air duct mechanism according to any one of claims 1 to 11.

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