Method for controlling air humidity in refrigerator and refrigerator

Abstract

The invention belongs to the technical field of refrigerators, and particularly provides a control method for air humidity in a refrigerator and the refrigerator. The refrigerator comprises a freezing chamber, a cold storage chamber, a refrigeration chamber, an evaporator arranged in the refrigeration chamber, a fan used for driving air in the refrigeration chamber to flow to the freezing chamber and the cold storage chamber, and a cold storage air door used for controlling connection and disconnection of the cold storage chamber and the refrigeration chamber. The control method comprises the steps that in response to the situation that a freezing chamber is reduced to a freezing and refrigerating finishing temperature and a refrigerating chamber is reduced to a refrigerating and refrigerating finishing temperature, a compressor of the refrigerator is controlled to stop running, a fan is controlled to run, and a refrigerating air door is controlled to be opened, so that air in the refrigerating chamber flows into the freezing chamber; the current temperature of the refrigeration chamber is obtained, and the current temperature is recorded as the current refrigeration temperature; and in response to the situation that the current refrigeration temperature does not drop to the preset first protection temperature and the continuous operation time of the draught fan reaches the preset duration, the draught fan is controlled to stop operating.

Description

Technical Field

[0001] The invention belongs to the technical field of refrigerators, and specifically provides a method for controlling air humidity in a refrigerator and a refrigerator. Background Art

[0002] Existing air-cooled refrigerators generally have a freezing compartment and a refrigerating compartment, and an evaporator is arranged in the refrigerating compartment. When the refrigerator is working, the evaporator cools the air in the refrigerating compartment to form cold air. The fan in the refrigerator drives the cold air to flow to the freezing compartment, and forces the air in the freezing compartment to flow to the refrigerating compartment. In this reciprocating cycle, the refrigerator realizes the refrigeration and temperature reduction of the freezing compartment.

[0003] However, since the freezer is used to freeze food, its temperature is relatively low, which makes the temperature of the evaporator that provides cooling capacity even lower. This also causes the moisture in the air to condense and adhere to the evaporator when the air flows through the evaporator, which in turn causes the air humidity in the freezer to be relatively low. As a result, the food in the freezer loses more moisture, affecting the freezer's preservation effect on the food inside, making the food taste worse and causing nutrient loss.

[0004] In order to overcome the above problems, the prior art generally reduces the operating frequency of the compressor, or heats the evaporator through a heating device to increase the temperature of the evaporator, so that the frost on the evaporator is transformed into water vapor by sublimation and enters the freezer compartment, thereby achieving the purpose of increasing the air humidity in the freezer compartment. At the same time, the frost on the evaporator cannot melt during this process, otherwise it will cause the evaporator to freeze, affecting the subsequent refrigeration effect of the evaporator.

[0005] However, in the above-mentioned prior art, the sublimation rate of frost is relatively slow, and the effect of improving the air humidity in the freezer room is relatively poor, resulting in the air humidity in the freezer room remaining at a relatively low level for a long time. Summary of the invention

[0006] An object of the present invention is to solve the problem that the freezing compartment of the existing refrigerator has a poor preservation effect on food due to the low air humidity in the freezing compartment.

[0007] A further object of the present invention is to determine the working time of the fan when increasing the air humidity in the freezing compartment.

[0008] Another further object of the present invention is to prevent the temperature of the refrigerating compartment from being too low during the process of increasing the air humidity in the freezing compartment.

[0009] To achieve the above object, the present invention provides a method for controlling air humidity in a refrigerator in a first aspect, the refrigerator comprising a freezing compartment, a refrigerating compartment, a refrigerating compartment, an evaporator arranged in the refrigerating compartment, a fan for driving air in the refrigerating compartment to flow to the freezing compartment and the refrigerating compartment, and a refrigerating damper for controlling the connection between the refrigerating compartment and the refrigerating compartment, the control method comprising:

[0010] In response to the freezing compartment being lowered to a freezing and refrigeration end temperature and the refrigerating compartment being lowered to a refrigeration and refrigeration end temperature, controlling the compressor of the refrigerator to stop running, controlling the fan to run, and controlling the refrigeration damper to open, so that the air in the refrigerating compartment flows into the freezing compartment;

[0011] Acquire the current temperature of the refrigerated compartment, and record the current temperature as the current refrigerated temperature;

[0012] In response to the current refrigeration temperature not dropping to the preset first protection temperature and the continuous operation time of the fan reaching the preset time length, the fan is controlled to stop running.

[0013] Optionally, the control method further includes:

[0014] In response to the freezing compartment being lowered to the freezing and refrigeration end temperature, obtaining the continuous operation time of the fan in this refrigeration cycle;

[0015] The preset duration is determined according to the continuous operation duration.

[0016] Optionally, the step of determining the preset duration according to the continuous running duration includes:

[0017]

[0018] Among them, t is the preset duration, t0 is a preset value, T is the continuous operation time of the compressor, and T0 is a preset value.

[0019] Optionally, the step of determining the preset duration according to the continuous running duration includes:

[0020] The preset duration is determined according to the continuous operation duration and a pre-stored compressor-fan time mapping table.

[0021] Optionally, the control method further includes:

[0022] In response to the current refrigeration temperature dropping to the first protection temperature, the refrigeration damper is controlled to be closed, and the fan is controlled to stop running.

[0023] Optionally, the step of controlling the operation of the fan includes:

[0024] The fan is controlled to run at a rotation speed with a duty cycle selected from any value between 30% and 90%.

[0025] Optionally, the step of controlling the refrigeration damper to open includes:

[0026] Determining the opening degree of the refrigeration damper according to the current temperature of the evaporator;

[0027] The refrigerating damper is controlled to open to the opening degree to adjust the ratio of the air from the refrigerating compartment to the air from the freezing compartment in the refrigerating compartment, thereby preventing the freezing compartment from heating up when more air comes from the refrigerating compartment.

[0028] Optionally, the step of determining the opening degree of the refrigeration damper according to the current temperature of the evaporator includes:

[0029] The opening degree of the refrigeration damper is determined according to the current temperature of the evaporator and a pre-stored evaporator temperature-refrigeration damper opening degree mapping table.

[0030] Optionally, the refrigerator further comprises a freezing damper for controlling the opening and closing of the freezing compartment and the refrigerating compartment, and the control method further comprises:

[0031] Determining the opening degree of the freezing damper according to the current temperature of the evaporator;

[0032] The freezing air door is controlled to open to the opening degree to adjust the ratio of air from the refrigerating compartment to the cold storage compartment and the freezing compartment.

[0033] In a second aspect, the present invention provides a refrigerator, comprising:

[0034] The box body is defined as a freezer compartment, a refrigeration compartment and a refrigerator compartment;

[0035] An evaporator is arranged in the refrigeration room;

[0036] A fan, used for driving the air in the refrigeration compartment to flow toward the freezing compartment and the cold storage compartment;

[0037] A refrigeration damper, used to control the opening and closing of the refrigeration compartment and the cooling compartment;

[0038] The controller comprises a memory and a processor, wherein the memory stores a machine executable program, and when the machine executable program is executed by the processor, the control method described in any one of the first aspects can be implemented.

[0039] Based on the above description, it can be understood by those skilled in the art that, in the above technical solution of the present invention, when the freezing compartment is lowered to the freezing and refrigeration end temperature and the refrigerating compartment is lowered to the refrigeration and refrigeration end temperature, the compressor of the refrigerator is controlled to stop running, the fan is controlled to run, and the refrigerating damper is controlled to open, so that the air in the refrigerating compartment can flow into the freezing compartment through the refrigerating compartment. Since the temperature in the refrigerating compartment is higher than the temperature in the freezing compartment, the moisture content in the air in the refrigerating compartment is also higher than the moisture content in the air in the freezing compartment (this is an objective physical phenomenon), so when the air in the refrigerating compartment enters the freezing compartment, the air can be mixed quickly, thereby effectively and quickly increasing the moisture content in the air in the freezing compartment, thereby correspondingly increasing the air humidity in the freezing compartment.

[0040] Furthermore, under the premise that the current refrigeration temperature of the refrigerating compartment has not dropped to the preset first protection temperature, if the continuous operation time of the fan reaches the preset time, the fan is controlled to stop running, thereby avoiding excessive humidity in the freezing compartment and temperature rise in the freezing compartment, thereby ensuring the preservation effect of the freezing compartment on food.

[0041] Furthermore, when the freezer compartment is lowered to the freezing and refrigeration end temperature, the circulation time of the air between the freezer compartment and the refrigeration compartment can be determined by obtaining the continuous operation time of the fan in this refrigeration cycle. The longer the continuous operation time, the longer the air circulation time, the longer the time for the air in the freezer compartment to be cooled and dried, and the lower the humidity of the air in the freezer compartment. By determining the preset time according to the continuous operation time, the fan can provide a sufficient humidity environment for the freezer compartment when it runs for the preset time after the compressor stops. If the fan runs for less than the preset time after the compressor stops, it may cause insufficient humidity in the freezer compartment. If the fan runs for more than the preset time after the compressor stops, it may cause the humidity in the freezer compartment to be too high, and the temperature to rise, affecting the preservation effect of the food.

[0042] Furthermore, when the current refrigeration temperature drops to the first protection temperature, by controlling the refrigeration damper to close and controlling the fan to stop running, it is possible to prevent the cold in the refrigeration room from continuing to enter the refrigeration room with the airflow, thereby preventing the temperature in the refrigeration room from being too low.

[0043] Other beneficial effects of the present invention will be described in detail below in conjunction with the accompanying drawings so that those skilled in the art can more clearly understand the improved purposes, features and advantages of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the technical solution of the present invention, some embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood by those skilled in the art that the components or parts indicated by the same figure mark in different drawings are the same or similar; the drawings of the present invention are not necessarily drawn to scale.

[0045] In the attached figure:

[0046] Figure 1 is a schematic block diagram of a refrigerator provided by the present invention;

[0047] Figure 2 This is a schematic diagram of the effect of a refrigerator provided by the present invention;

[0048] Figure 3 yes Figure 2 A schematic cross-sectional view of the middle refrigerator along the AA direction;

[0049] Figure 4 is a flow chart of the main steps of a method for controlling air humidity in a refrigerator in some embodiments of the present invention;

[0050] Figure 5 is a flow chart of steps for controlling a refrigeration damper in some embodiments of the present invention;

[0051] Figure 6 It is an evaporator temperature-refrigeration damper opening degree mapping table provided by the present invention;

[0052] Figure 7 is a partial step flow chart of a method for controlling air humidity in a refrigerator in some embodiments of the present invention;

[0053] Figure 8 It is a compressor-blower time mapping table provided by the present invention;

[0054] Fig. 9 is a partial step flow chart of a method for controlling air humidity in a refrigerator in other embodiments of the present invention;

[0055] Fig.10 It is a schematic block diagram of some components of the refrigerator in the present invention. DETAILED DESCRIPTION

[0056] It should be understood by those skilled in the art that the embodiments described below are only some embodiments of the present invention, rather than all embodiments of the present invention, and these embodiments are intended to explain the technical principles of the present invention, rather than to limit the protection scope of the present invention. Based on the embodiments provided by the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should still fall within the protection scope of the present invention.

[0057] It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "top", "bottom", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0058] Furthermore, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0059] In addition, it should be noted that in the description of the present invention, the terms "cold" and "heat" are two descriptions of the same physical state. That is, the higher the "cold" of a certain target object (such as an evaporator, air, condenser, etc.), the lower the "heat" it has, and the lower the "cold" it has, the higher the "heat" it has. A certain target object will release "heat" while absorbing "cold", and will absorb "heat" while releasing "cold". A certain target object stores "cold" or "heat" to keep the current temperature of the target object. "Refrigeration" and "heat absorption" are two descriptions of the same physical phenomenon, that is, a certain target object (such as an evaporator) will absorb heat while cooling.

[0060] Finally, it should be noted that in the description of the present invention, each functional module can be a physical module composed of multiple structures, components or electronic components, or a virtual module composed of multiple programs; each functional module can be a module that exists independently of each other, or a module divided according to the function of an integral module. Those skilled in the art should understand that, under the premise of being able to implement the technical solution described in the present invention, no matter how the composition, implementation and positional relationship of each functional module change, they will not deviate from the technical principle of the present invention, and therefore should fall within the protection scope of the present invention.

[0061] like Figure 1 As shown, in the present invention, the refrigerator 1 includes a cabinet 100 and a refrigeration system 200 arranged on the cabinet 100 , and the refrigeration system 200 is used to provide cold energy for the refrigerator 1 .

[0062] Continue reading Figure 1 In the present invention, the refrigeration system 200 includes a compressor 210, a condenser 220, a capillary tube 230 and an evaporator 240 which are connected end to end in sequence to form a loop so that the refrigerant circulates along the following path: compressor 210 → condenser 220 → capillary tube 230 → evaporator 240 → compressor 210.

[0063] Specifically, when the refrigerant flows through the compressor 210, it is compressed by the compressor 210 into a high temperature and high pressure state (liquid state or gas-liquid mixed state). When the refrigerant flows through the condenser 220, the condenser 220 dissipates heat and the temperature is reduced to a low temperature and high pressure state (liquid state or gas-liquid mixed state). When the refrigerant flows through the capillary 230, the capillary 230 throttles and reduces the pressure to a low temperature and low pressure state (liquid state or gas-liquid mixed state). When the refrigerant flows through the evaporator 240, the evaporator 240 absorbs heat from the external environment and heats up to a high temperature and low pressure state (gas state).

[0064] It should be noted that the aforementioned states of the refrigerant in the compressor 210, the condenser 220, the capillary tube 230, and the evaporator 240, i.e., the high temperature, low temperature, high pressure, and low pressure of the refrigerant, are the states of the refrigerant after it enters the corresponding components or flows out of the corresponding components compared to the states before it flows into the corresponding components.

[0065] In addition, those skilled in the art may also replace the capillary tube 230 with any other feasible pressure-reducing and throttling component, such as an electronic expansion valve, as needed.

[0066] It should be noted that, since the refrigerator 1 has various forms, those skilled in the art may also appropriately adjust the refrigeration system 200 according to the actual form of the refrigerator 1. For example, multiple evaporators 240 are arranged in series or in parallel to form a refrigeration module that works simultaneously.

[0067] like Figure 2 and Figure 3 As shown, in some embodiments of the present invention, the cabinet 100 defines a freezing compartment 110 , a refrigerating compartment 120 and a cooling compartment 130 , and the freezing compartment 110 and the refrigerating compartment 120 are communicated with the cooling compartment 130 , respectively.

[0068] Furthermore, a refrigerating air supply passage 111 and a refrigerating air return passage 112 may be provided between the freezing chamber 110 and the refrigerating chamber 130, so that air circulates along the following path: refrigerating chamber 130 → refrigerating air supply passage 111 → freezing chamber 110 → refrigerating air return passage 112 → refrigerating chamber 130. For the convenience of description, this air circulation path is recorded as a refrigerating circulation path.

[0069] Accordingly, a refrigeration air supply passage 121 and a refrigeration return air passage 122 may be provided between the refrigeration compartment 120 and the cooling compartment 130, so that air circulates along the following path: cooling compartment 130 → refrigeration air supply passage 121 → refrigeration compartment 120 → refrigeration return air passage 122 → refrigeration compartment 130. For the convenience of description, this air circulation path is recorded as a refrigeration circulation path.

[0070] Continue reading Figure 2 and Figure 3 In some embodiments of the present invention, an evaporator 240 is arranged in the refrigerating compartment 130 to cool the air in the refrigerating compartment 130 through the evaporator 240. In addition, the refrigerator 1 further includes a fan 410 for driving the air in the refrigerating compartment 130 to flow toward the freezing compartment 110 and the refrigerating compartment 120, and a refrigerating damper 420 for controlling the opening and closing of the refrigerating compartment 120 and the refrigerating compartment 130.

[0071] The fan 410 may be a centrifugal fan 410 , an axial flow fan 410 , or a cross-flow fan 410 .

[0072] based on Figure 2 and Figure 3 It is understood by those skilled in the art that when the refrigerating damper 420 is opened, the fan 410 drives part of the air in the refrigerating compartment 130 to flow to the freezing compartment 110, and the other part to flow to the refrigerating compartment 120, and the air circulates in the refrigerating cycle path and the refrigerating cycle path described above. When the refrigerating damper 420 is closed, the fan 410 drives the air in the refrigerating compartment 130 to flow only to the freezing compartment 110, and the air circulates in the refrigerating cycle path described above.

[0073] In addition, those skilled in the art may also configure a freezing damper for the refrigerator 1 as needed, so as to control the opening and closing of the freezing compartment 110 and the refrigeration compartment 130 through the freezing damper.

[0074] It should be noted that Figure 2 and Figure 3 The relative positional relationship and the connection relationship of the freezing compartment 110, the refrigerating compartment 120 and the cooling compartment 130 are only schematically shown, and the relationship between the fan 410 and the refrigerating damper 420 and the cabinet 100 is schematically shown. On the premise of achieving the above purpose, those skilled in the art can also appropriately optimize the position or specific form of the above structures or components as needed.

[0075] For example, the fan 410 is disposed in the refrigeration compartment 130. The fan 410 is configured as an axial flow fan 410, so that the air inlet of the axial flow fan 410 faces the evaporator 240 (that is, the evaporator 240 is located on the windward side of the fan 410), and the air outlet side of the axial flow fan 410 faces the inlet of the freezing air supply channel 111 and the refrigeration air supply channel 121, and the inlet of the freezing air supply channel 111, the inlet of the refrigeration air supply channel 121, the outlet of the freezing return air channel 112, and the outlet of the refrigeration return air channel 122 are all exposed in the refrigeration compartment 130.

[0076] For another example, the refrigeration damper 420 is disposed at the outlet of the refrigeration return air passage 122 .

[0077] In addition, if Figure 2 and Figure 3 As shown, in some embodiments of the present invention, the refrigerator 1 further includes a door body 300 for shielding the freezing compartment 110 and the refrigerating compartment 120 , and a water receiving tray 430 disposed below the evaporator 240 and other conventional components.

[0078] Refer to the following Figure 2 and Figure 3 The method for controlling the air humidity in a refrigerator of the present invention is described in detail with reference to the refrigerator 1 described above.

[0079] like Figure 4 As shown, in some embodiments of the present invention, the method for controlling the air humidity in a refrigerator includes:

[0080] In step S110, in response to the freezer compartment 110 being lowered to the freezing and refrigeration end temperature and the refrigerator compartment 120 being lowered to the refrigeration and refrigeration end temperature, the compressor 210 of the refrigerator 1 is controlled to stop running, the fan 410 is controlled to run, and the refrigeration damper 420 is controlled to open, so that the air in the refrigeration compartment 120 flows into the freezer compartment 110.

[0081] The freezing and refrigeration end temperature is the temperature at which the freezing chamber 110 ends refrigeration after refrigeration begins, and it can be any feasible value, such as -16°C, -18°C, -21°C, -23°C, etc.

[0082] The refrigeration end temperature is the temperature at which the refrigeration of the refrigeration compartment 120 ends after the refrigeration starts, and it can be any feasible value, such as -4°C, 0°C, 1°C, 3°C, etc.

[0083] Step S120, obtaining the current temperature of the refrigerating compartment 120, and recording the current temperature as the current refrigerating temperature.

[0084] Since obtaining the current temperature of the refrigerating compartment 120 is a conventional technical means in the art, it will not be described in detail here.

[0085] Step S130, in response to the current refrigeration temperature not dropping to the preset first protection temperature and the continuous operation time of the fan 410 reaching the preset time length, the fan 410 is controlled to stop running.

[0086] The first protection temperature may be a critical temperature at which the food in the refrigerating chamber 120 begins to freeze, such as -2°C, -1°C, 0°C, etc.; or a temperature higher than the critical temperature but affecting the taste of the food, such as 1°C, 2°C, 3°C, 4°C, etc. Preferably, the first protection temperature is selected from any value between -2°C and 3°C.

[0087] The preset time length is data pre-stored in the refrigerator 1 or in a device connected to the refrigerator 1. The preset time length may be any feasible time length.

[0088] Furthermore, the preset duration is selected from any value between 1S and 600S, such as 20S, 50S, 150S, 200S, 300S, 500S, 590S, 600S, etc.

[0089] Based on the above description, it can be understood by those skilled in the art that, in some embodiments of the present invention, when the freezing compartment 110 is lowered to the freezing and refrigerating end temperature and the refrigerating compartment 120 is lowered to the refrigerating and refrigerating end temperature, the compressor 210 of the refrigerator 1 is controlled to stop running, the fan 410 is controlled to run, and the refrigerating damper 420 is controlled to open, so that the air in the refrigerating compartment 120 can flow into the freezing compartment 110 via the refrigerating compartment 130. Since the temperature in the refrigerating compartment 120 is higher than the temperature in the freezing compartment 110, the moisture content in the air in the refrigerating compartment 120 is also higher than the moisture content in the air in the freezing compartment 110 (this is an objective physical phenomenon), so when the air in the refrigerating compartment 120 enters the freezing compartment 110, the air can be mixed quickly, thereby effectively and quickly increasing the moisture content in the air in the freezing compartment 110, thereby correspondingly increasing the air humidity in the freezing compartment 110.

[0090] Furthermore, under the premise that the current refrigeration temperature of the refrigerating compartment 120 has not dropped to the preset first protection temperature, if the continuous operation time of the fan 410 reaches the preset time length, the fan 410 is controlled to stop running, thereby avoiding excessive humidity in the freezing compartment 110 and preventing the freezing compartment 110 from experiencing a temperature rise, thereby ensuring the preservation effect of the freezing compartment 110 on food.

[0091] Furthermore, in some embodiments of the present invention, "controlling the operation of the fan 410" in step S110 may further include: controlling the fan 410 to operate at a speed with a duty cycle selected from any value between 30% and 90%. For example, the duty cycle may be 30%, 45%, 50%, 62%, 69%, 75%, 83%, 89%, 90%, etc.

[0092] Those skilled in the art will appreciate that by controlling the fan 410 to operate according to the above duty cycle, it is possible to effectively avoid excessive cold entering the freezing compartment 110 and the refrigerating compartment 120, thereby causing the freezing compartment 110 and the temperature inside the freezing compartment 110 to be too low.

[0093] like Figure 5 As shown, in some embodiments of the present invention, the "controlling the refrigeration damper 420 to open" in step S110 may further include:

[0094] Step S111 , determining the opening degree of the refrigeration damper 420 according to the current temperature of the evaporator 240 .

[0095] The corresponding relationship between the temperature of the evaporator 240 and the opening degree of the refrigeration damper 420 can be determined through multiple tests under the premise of ensuring that the food in the refrigeration compartment 120 does not freeze. For example, the corresponding relationship between the temperature of the evaporator 240 and the opening degree of the refrigeration damper 420 is as follows: Figure 6 As shown in the table.

[0096] Specifically, the current temperature of the evaporator 240 and a pre-stored evaporator temperature-refrigeration damper opening degree mapping table (eg Figure 6 As shown), determine the opening degree of the refrigeration damper 420.

[0097] Step S112, controlling the refrigerating damper 420 to open to a certain degree, so as to adjust the ratio of the air from the refrigerating compartment 120 to the air from the freezing compartment 110 in the refrigerating compartment 130, thereby preventing the freezing compartment 110 from heating up when more air comes from the refrigerating compartment 120.

[0098] Based on the foregoing description, those skilled in the art will appreciate that, in some embodiments of the present invention, the degree of opening of the refrigeration damper 420 and the rotation speed of the fan 410 can be controlled to effectively prevent the temperatures of the freezer compartment 110 and the refrigeration compartment 120 from being too low, and to prevent the freezer compartment 110 from heating up.

[0099] It should be noted that the above-mentioned embodiment of the present invention is only a basic embodiment of the present invention. In other embodiments of the present invention, those skilled in the art may also adjust, optimize and configure the schemes and steps in the above-mentioned embodiments as needed to achieve further technical effects. Other embodiments of the present invention different from the above-mentioned embodiments will be described in conjunction with the accompanying drawings hereinafter. Of course, those skilled in the art may also make appropriate modifications to the execution order, operating conditions and quantity of the steps in the embodiments to be described hereinafter according to actual needs. The modified embodiments do not deviate from the technical concept and / or technical principle of the present invention and should still fall within the scope of protection of the present invention.

[0100] like Figure 7 As shown, compared with some embodiments described above, in some further embodiments of the present invention, the method for controlling the air humidity in the refrigerator further includes:

[0101] Step S210, in response to the freezing compartment 110 being lowered to the freezing and refrigeration end temperature, the continuous operation time of the fan 410 in the current refrigeration cycle is obtained.

[0102] Step S220: determining a preset duration according to the continuous operation duration.

[0103] The preset duration can be determined by the following formula:

[0104]

[0105] Wherein, t is a preset duration, t0 is a preset value, T is the continuous operation duration of the compressor 210, and T0 is a preset value.

[0106] Furthermore, t0 can be any value selected from 100S to 600S, and T0 can be any value selected from 5min to 15min, for example, t0=500S, T0=14min; t0=400S, T0=12min; t0=250S, T0=7min, etc.

[0107] It should be noted that the larger the value of t0 is, the smaller the value of T0 is.

[0108] Alternatively, those skilled in the art may also, as required, make step S220 include: Figure 8 ), and determine the preset duration.

[0109] It is understood by those skilled in the art that when the freezing compartment 110 is lowered to the freezing and refrigeration end temperature, the circulation time of the air between the freezing compartment 110 and the refrigeration compartment 130 can be determined by obtaining the continuous operation time of the fan 410 in this refrigeration cycle. The longer the continuous operation time, the longer the air circulation time, the longer the time for the air in the freezing compartment 110 to be cooled and dried, and the lower the humidity of the air in the freezing compartment 110. In some other embodiments of the present invention, by determining a preset time according to the continuous operation time, the fan 410 can provide a sufficient humidity environment for the freezing compartment 110 when it runs for the preset time after the compressor 210 stops. If the fan 410 runs for less than the preset time after the compressor 210 stops, the humidity in the freezing compartment 110 may be insufficient. If the fan 410 runs for more than the preset time after the compressor 210 stops, the humidity in the freezing compartment 110 may be too high, and the temperature may rise, affecting the preservation effect of the food.

[0110] Furthermore, although not shown in the figures, in some other embodiments of the present invention, the method for controlling the air humidity in the refrigerator may also include: in response to the current refrigeration temperature dropping to the first protection temperature, controlling the refrigeration damper 420 to close, and controlling the fan 410 to stop running, so as to prevent excessive cold from entering the refrigeration compartment 120, resulting in the temperature in the refrigeration compartment 120 being too low.

[0111] like Fig. 9 As shown, in other embodiments of the present invention, the refrigerator 1 further includes a freezing damper for controlling the opening and closing of the freezing chamber 110 and the refrigeration chamber 130, and the control method further includes steps S310 and S320 replacing steps S111 and S112.

[0112] Wherein, step S310 includes determining the opening degree of the freezing damper according to the current temperature of the evaporator 240.

[0113] The step S320 includes controlling the freezing air door to open to a certain degree so as to adjust the ratio of air from the refrigerating compartment 130 to the cold storage compartment 120 and the freezing compartment 110 .

[0114] The above-mentioned step S310 and step S320 may refer to the description of the above-mentioned step S111 and step S112 for details. The main difference between the two is that step S111 and step S112 adjust the ratio of the air flowing from the refrigerating compartment 130 to the refrigerating compartment 120 and the freezing compartment 110 by controlling the opening of the refrigerating damper 420, and step S310 and step S320 adjust the ratio of the air flowing from the refrigerating compartment 130 to the refrigerating compartment 120 and the freezing compartment 110 by controlling the opening of the freezing damper.

[0115] like Fig.10 As shown, in the present invention, the refrigerator 1 may further include a controller 500, which includes a memory 510 and a processor 520, the memory 510 stores a machine executable program 511, and when the machine executable program 511 is executed by the processor 520, it can implement the control method described in any of the above embodiments.

[0116] The memory 510 may include a memory and a non-volatile memory, and provide execution instructions and data to the processor 520. For example, the memory may be a high-speed random access memory (RAM), and the non-volatile memory may be at least one disk storage.

[0117] In this embodiment, the processor 520 is an integrated circuit chip that has the ability to process signals. The processor 520 can be a general-purpose processor, such as a central processing unit (CPU), a network processor (NP), a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, microprocessors, and any other conventional processors.

[0118] So far, the technical solution of the present invention has been described in combination with the above multiple embodiments, but it is easy for those skilled in the art to understand that the protection scope of the present invention is not limited to these specific embodiments. Without departing from the technical principles of the present invention, those skilled in the art can split and combine the technical solutions in the above embodiments, and can also make equivalent changes or replacements to the relevant technical features. Any changes, equivalent replacements, improvements, etc. made within the technical concept and / or technical principles of the present invention will fall within the protection scope of the present invention.

[0119] Finally, it should be noted that the refrigerator 1 of the present invention is a refrigerator in a broad sense, which not only includes the so-called refrigerator in a narrow sense, but also includes fresh-keeping equipment with refrigeration and / or freezing functions, such as refrigerators, freezers, etc.

[0120] In the present invention, the term "communication" means fluid communication, so as to allow fluid (such as air, liquid) to flow between two connected objects. And the "communication" can be to allow the fluid to flow between the two connected objects without leakage, or to allow the fluid to flow between the two connected objects with a little leakage.

Claims

1. A method for controlling air humidity in a refrigerator, the refrigerator comprising a freezing compartment, a cold storage compartment, a refrigerating compartment, an evaporator arranged in the refrigerating compartment, a fan for driving air in the refrigerating compartment to flow to the freezing compartment and the cold storage compartment, and a cold storage damper for controlling the connection and disconnection between the cold storage compartment and the refrigerating compartment, the control method comprising: In response to the freezing compartment being lowered to a freezing and refrigeration end temperature and the refrigerating compartment being lowered to a refrigeration and refrigeration end temperature, controlling the compressor of the refrigerator to stop running, controlling the fan to run, and controlling the refrigeration damper to open, so that the air in the refrigerating compartment flows into the freezing compartment; Acquire the current temperature of the refrigerated compartment, and record the current temperature as the current refrigerated temperature; In response to the current refrigeration temperature not dropping to the preset first protection temperature and the continuous operation time of the fan reaching the preset time length, the fan is controlled to stop running.

2. The control method according to claim 1, further comprising: In response to the freezing compartment being lowered to the freezing and refrigeration end temperature, obtaining the continuous operation time of the fan in this refrigeration cycle; The preset duration is determined according to the continuous operation duration.

3. The control method according to claim 2, wherein: The step of determining the preset duration according to the continuous operation duration includes: Among them, t is the preset duration, t0 is a preset value, T is the continuous operation time of the compressor, and T0 is a preset value.

4. The control method according to claim 2, wherein: The step of determining the preset duration according to the continuous operation duration includes: The preset duration is determined according to the continuous operation duration and a pre-stored compressor-fan time mapping table.

5. The control method according to claim 1, further comprising: In response to the current refrigeration temperature dropping to the first protection temperature, the refrigeration damper is controlled to be closed, and the fan is controlled to stop running.

6. The control method according to claim 1, wherein: The step of controlling the operation of the fan comprises: The fan is controlled to run at a rotation speed with a duty cycle selected from any value between 30% and 90%.

7. The control method according to claim 1, wherein: The step of controlling the refrigeration damper to open comprises: Determining the opening degree of the refrigeration damper according to the current temperature of the evaporator; The refrigerating damper is controlled to open to the opening degree to adjust the ratio of the air from the refrigerating compartment to the air from the freezing compartment in the refrigerating compartment, thereby preventing the freezing compartment from heating up when more air comes from the refrigerating compartment.

8. The control method according to claim 7, wherein: The step of determining the opening degree of the refrigeration damper according to the current temperature of the evaporator comprises: The opening degree of the refrigeration damper is determined according to the current temperature of the evaporator and a pre-stored evaporator temperature-refrigeration damper opening degree mapping table.

9. The control method according to claim 1, wherein the refrigerator further comprises a freezing damper for controlling the opening and closing of the freezing compartment and the refrigerating compartment, and the control method further comprises: Determining the opening degree of the freezing damper according to the current temperature of the evaporator; The freezing air door is controlled to open to the opening degree to adjust the ratio of air from the refrigerating compartment to the cold storage compartment and the freezing compartment.

10. A refrigerator, comprising: The box body is defined as a freezer compartment, a refrigeration compartment and a refrigerator compartment; An evaporator is arranged in the refrigeration room; A fan, used for driving the air in the refrigeration compartment to flow toward the freezing compartment and the cold storage compartment; A refrigeration damper, used to control the opening and closing of the refrigeration compartment and the cooling compartment; A controller comprises a memory and a processor, wherein the memory stores a machine executable program, and when the machine executable program is executed by the processor, the control method according to any one of claims 1 to 9 can be implemented.

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