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; and in response to the fact that the current humidity of the freezing chamber reaches the preset humidity condition, the fan is controlled to stop running. The air humidity in the freezing chamber can be improved.

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, making the air dry; 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 preservation effect of the freezer 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 prevent the temperature of the refrigerating compartment from being too low during the process of increasing the air humidity in the freezing compartment.

[0008] A further object of the present invention is to determine the heating power of a heating device when heating air flowing to a refrigerated 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] In response to the current humidity of the freezing compartment reaching a preset humidity condition, the fan is controlled to stop running.

[0012] Optionally, the step of controlling the operation of the fan includes:

[0013] obtaining the temperature of the evaporator;

[0014] Determining the speed of the fan according to the temperature of the evaporator;

[0015] The fan is controlled to operate at the determined rotation speed.

[0016] Optionally, the refrigerator further comprises a heating device for heating the air flowing toward the refrigerating compartment;

[0017] After controlling the refrigeration damper to open, the control method further includes:

[0018] Obtaining the current temperature of the refrigerated compartment and recording it as the current refrigerated temperature;

[0019] In response to the current refrigeration temperature being less than or equal to the first preset refrigeration temperature, the heating device is controlled to operate.

[0020] Optionally, the step of controlling the heating device to operate includes: controlling the heating device to operate according to the following heating power P:

[0021] P=C·M·(T 藏 -T 蒸 -4)

[0022] Wherein, C is the specific heat capacity of air; M is the air supply volume of the refrigerated compartment and is positively correlated with the speed of the fan; T 藏 is the current refrigeration temperature of the refrigeration compartment; T 蒸 is the current temperature of the evaporator and is recorded as the current evaporation temperature.

[0023] Optionally, during the process of executing the step of controlling the operation of the heating device, the control method further includes:

[0024] In response to the current refrigeration temperature reaching a second preset refrigeration temperature, controlling the heating device to stop working;

[0025] Wherein, the second preset refrigeration temperature is greater than the first preset refrigeration temperature.

[0026] Optionally, the heating device is an electric heating wire.

[0027] Optionally, in response to the current humidity of the freezing compartment reaching a preset humidity condition, the step of controlling the fan to stop running comprises:

[0028] In response to the current humidity of the freezing compartment rising to a preset humidity value, the fan is controlled to stop running.

[0029] Optionally, in response to the current humidity of the freezing compartment reaching a preset humidity condition, the step of controlling the fan to stop running comprises:

[0030] In response to the fan continuing to operate for a preset time period after the compressor stops, the fan is controlled to stop operating.

[0031] Optionally, the step of controlling the refrigeration damper to open includes:

[0032] Determining the opening degree of the refrigeration damper according to the current temperature of the evaporator;

[0033] 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.

[0034] The present invention further provides a refrigerator in a second aspect, comprising:

[0035] The box body is defined as a freezer compartment, a refrigeration compartment and a refrigerator compartment;

[0036] An evaporator is arranged in the refrigeration room;

[0037] A fan, used for driving the air in the refrigeration compartment to flow toward the freezing compartment and the cold storage compartment;

[0038] A refrigeration damper, used to control the opening and closing of the refrigeration compartment and the cooling compartment;

[0039] 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.

[0040] 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.

[0041] Furthermore, by configuring a heating device for heating the air flowing to the refrigerated compartment, and controlling the heating device to operate when the current refrigerated temperature of the refrigerated compartment is less than or equal to the first preset refrigerated temperature, the air flowing to the refrigerated compartment is heated, thereby avoiding the refrigerated compartment from having a temperature that is too low.

[0042] Going further, through the formula - P = C·M·(T 藏 -T 蒸 -4) to determine the heating power of the heating device, so that the heating power of the heating device can be automatically adjusted according to the temperature of the evaporator, the current refrigeration temperature of the refrigeration compartment and the speed of the fan, while avoiding the refrigeration compartment temperature from being too low, and also avoiding the refrigeration compartment from having a temperature rise.

[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 same reference numerals indicate the same or similar components or parts in different drawings; 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 2This 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 humidifying a freezing compartment in some embodiments of the present invention;

[0051] Figure 6 is a flow chart of steps for stopping humidification of a freezing compartment in some embodiments of the present invention;

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

[0053] Figure 8 It is a schematic block diagram of some components of the refrigerator in the present invention. DETAILED DESCRIPTION

[0054] 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.

[0055] 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.

[0056] Furthermore, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", and "connect" 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 connection 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 the specific circumstances. For example, the terms "install", "connect", "connect" and "fix", unless otherwise specifically described, can specifically be any feasible connection form such as bolt connection, screw connection, welding, plug-in, riveting, melting, and clamping.

[0057] 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.

[0058] 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 .

[0059] 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.

[0060] 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).

[0061] 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.

[0062] 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.

[0063] 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.

[0064] 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.

[0065] 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.

[0066] 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.

[0067] 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.

[0068] The fan 410 may be a centrifugal fan, an axial flow fan, or a cross flow fan.

[0069] 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.

[0070] 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.

[0071] Continue reading Figure 2 and Figure 3 In some embodiments of the present invention, the refrigerator 1 further includes a heating device 430 for heating the air flowing toward the refrigerating compartment 120 .

[0072] Specifically, the heating device 430 may be disposed in the refrigerated air supply passage 121 to heat the air flowing through the refrigerated air supply passage 121 .

[0073] Furthermore, the heating device 430 may be an electric heating wire. Alternatively, those skilled in the art may also configure the heating device 430 as any other feasible heating device as required.

[0074] It should be noted that Figure 2 and Figure 3 The relative positional relationship and the connection relationship between the freezing compartment 110, the refrigerating compartment 120 and the cooling compartment 130 are only schematically shown, and the relationship between the fan 410, the refrigerating damper 420 and the heating device 430 and the cabinet 100 is schematically shown. Under 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 set as an axial flow fan, so that the air inlet of the axial flow fan faces the evaporator 240, and the air outlet side of the axial flow fan faces the inlet of the refrigerated air supply channel 111 and the refrigerated air supply channel 121, and the inlet of the refrigerated air supply channel 111, the inlet of the refrigerated air supply channel 121, the outlet of the refrigerated return air channel 112, and the outlet of the refrigerated 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 440 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 , in response to the current humidity of the freezing chamber 110 reaching a preset humidity condition, the fan 410 is controlled to stop running.

[0084] The preset humidity condition is the optimal humidity condition for the freezing chamber 110 to preserve the food therein, and its specific value may be selected from 80% to 100%, such as 80%, 85%, 92%, 98%, 100%, etc.

[0085] Since obtaining the current humidity of the freezing compartment 110 is a conventional technical means in the art, it will not be described in detail here.

[0086] It is 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, no doubt), 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.

[0087] Those skilled in the art can also understand that, since the evaporator 240 always maintains a temperature lower than the temperature in the freezing compartment 110 during the operation of the compressor 210, the temperature of the evaporator 240 is still lower than the temperature in the freezing compartment 110 for a period of time just after the compressor 210 stops working. Therefore, after the compressor 210 stops, as long as it is ensured that the air flowing out of the refrigerating compartment 120 flows through the refrigerating compartment 130, especially the evaporator 240, the cold air in the refrigerating compartment 130 mixed with the air in the refrigerating compartment 120 will not cause the temperature rise of the freezing compartment 110. Or the temperature rise is not obvious and can be ignored.

[0088] like Figure 5 As shown, in some embodiments of the present invention, step S110 may further include:

[0089] Step S111 , obtaining the temperature of the evaporator 240 .

[0090] The evaporator 240 is provided with a temperature sensor for detecting the temperature thereof, so that the refrigerator 1 detects the temperature of the evaporator 240 through the temperature sensor.

[0091] Step S112 , determining the rotation speed of the fan 410 according to the temperature of the evaporator 240 .

[0092] The lower the temperature of the evaporator 240 is, the lower the rotation speed of the fan 410 is, so as to prevent excessive cold from entering the refrigerating compartment 120 and causing the food in the refrigerating compartment 120 to freeze.

[0093] Furthermore, the rotation speed of the fan 410 is preferably within a duty cycle of 30% to 90%.

[0094] Furthermore, the corresponding relationship between the temperature of the evaporator 240 and the rotation speed of the fan 410 can be determined through multiple tests under the premise of ensuring that the food in the refrigerated compartment 120 does not freeze. In order to promote air flow, under the premise of ensuring that the food in the refrigerated compartment 120 does not freeze, the rotation speed of the fan 410 should be as large as possible.

[0095] Step S113, controlling the fan 410 to run at the determined rotation speed, so that the food in the refrigerating chamber 120 is frozen.

[0096] In optional step S114 , the opening degree of the refrigeration damper 420 is determined according to the current temperature of the evaporator 240 .

[0097] 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 is not frozen.

[0098] Step S115, 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 the air from the refrigerating compartment 120 is greater.

[0099] like Figure 6 As shown, in some embodiments of the present invention, step S120 may further include step S121 or step S122.

[0100] Step S121 includes, in response to the current humidity of the freezing compartment 110 rising to a preset humidity value, controlling the fan 410 to stop running.

[0101] The preset humidity value may be selected from 80% to 100%, such as 80%, 85%, 92%, 98%, 100%, etc.

[0102] Step S122 includes, in response to the fan 410 continuously running for a preset time period after the compressor 210 stops, controlling the fan 410 to stop running.

[0103] Among them, the preset duration can be selected from 1 second to 600 seconds, such as 30 seconds, 45 seconds, 60 seconds, 80 seconds, 120 seconds, 300 seconds, 600 seconds, etc.

[0104] 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.

[0105] like Figure 7 As shown, compared with some embodiments described above, in other embodiments of the present invention, the method for controlling the air humidity in the refrigerator further includes, after controlling the refrigeration damper 420 to open:

[0106] Step S210, obtaining the current temperature of the refrigerating compartment 120 and recording it as the current refrigerating temperature.

[0107] 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.

[0108] Step S220, in response to the current refrigeration temperature being less than or equal to the first preset refrigeration temperature, controlling the heating device 430 to operate.

[0109] The first preset refrigeration temperature may be a critical temperature at which the food in the refrigeration compartment 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 preset refrigeration temperature is selected from any value between -2°C and 3°C.

[0110] Step S220 specifically includes controlling the heating device 430 to operate according to the following heating power P:

[0111] P=C·M·(T 藏 -T 蒸 -4)

[0112] Wherein, C is the specific heat capacity of air; M is the air supply volume of the refrigerated compartment 120 and is positively correlated with the rotation speed of the fan 410; T 藏 is the current refrigeration temperature of the refrigeration compartment 120; T 蒸 is the current temperature of the evaporator 240 and is recorded as the current evaporation temperature.

[0113] The corresponding relationship between M and the rotation speed of the fan 410 can be determined through multiple tests. This is a common technical means used by those skilled in the art, so it will not be explained in detail here.

[0114] Step S230, in response to the current refrigeration temperature reaching the second preset refrigeration temperature, controlling the heating device 430 to stop working.

[0115] The second preset refrigeration temperature is greater than the first preset refrigeration temperature. For example, the second preset refrigeration temperature is 1°C, 3°C, 5°C, 6°C, etc. greater than the first preset refrigeration temperature.

[0116] Based on the above description, those skilled in the art can understand that, in other embodiments of the present invention, by the formula - P = C·M·(T 藏 -T 蒸 -4) to determine the heating power of the heating device 430, so that the heating power of the heating device 430 can be automatically adjusted according to the temperature of the evaporator 240, the current refrigeration temperature of the refrigeration compartment 120 and the rotation speed of the fan 410, while preventing the temperature of the refrigeration compartment 120 from being too low, and also preventing the temperature of the refrigeration compartment 120 from rising.

[0117] Furthermore, in order to prevent the freezing chamber 110 from experiencing a temperature rise during the process of increasing the air humidity, the freezing chamber 110 may be pre-cooled before the freezing chamber 110 ends refrigeration, or the freezing and refrigeration end temperature may be lowered.

[0118] Furthermore, if Figure 8 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.

[0119] 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.

[0120] 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.

[0121] 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.

[0122] 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.

[0123] 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; In response to the current humidity of the freezing compartment reaching a preset humidity condition, the fan is controlled to stop running.

2. The control method according to claim 1, wherein: The step of controlling the operation of the fan comprises: obtaining the temperature of the evaporator; Determining the speed of the fan according to the temperature of the evaporator; The fan is controlled to operate at the determined rotation speed.

3. The control method according to claim 1, wherein: The refrigerator further comprises a heating device for heating air flowing toward the refrigerating compartment; After controlling the refrigeration damper to open, the control method further includes: Obtaining the current temperature of the refrigerated compartment and recording it as the current refrigerated temperature; In response to the current refrigeration temperature being less than or equal to the first preset refrigeration temperature, the heating device is controlled to operate.

4. The control method according to claim 3, wherein: The step of controlling the operation of the heating device comprises: controlling the heating device to operate according to the following heating power P, P=C·M·(T 藏 -T 蒸 -4) Wherein, C is the specific heat capacity of air; M is the air supply volume of the refrigerated compartment and is positively correlated with the speed of the fan; T 藏 is the current refrigeration temperature of the refrigeration compartment; T 蒸 is the current temperature of the evaporator and is recorded as the current evaporation temperature.

5. The control method according to claim 3, wherein: In the process of executing the step of controlling the operation of the heating device, the control method further includes: In response to the current refrigeration temperature reaching a second preset refrigeration temperature, controlling the heating device to stop working; Wherein, the second preset refrigeration temperature is greater than the first preset refrigeration temperature.

6. The control method according to any one of claims 3 to 5, wherein: The heating device is an electric heating wire.

7. The control method according to any one of claims 3 to 5, wherein: The step of controlling the fan to stop running in response to the current humidity of the freezing compartment reaching a preset humidity condition comprises: In response to the current humidity of the freezing compartment rising to a preset humidity value, the fan is controlled to stop running.

8. The control method according to any one of claims 3 to 5, wherein: The step of controlling the fan to stop running in response to the current humidity of the freezing compartment reaching a preset humidity condition comprises: In response to the fan continuing to operate for a preset time period after the compressor stops, the fan is controlled to stop operating.

9. 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.

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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