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 refrigerating chamber and the current humidity of the freezing chamber are obtained, and the current temperature is recorded as the current refrigerating temperature; and in response to the situation that the current refrigeration temperature does not drop to the preset first protection temperature and the current humidity reaches the preset humidity value, the fan is controlled to stop running.

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 prevent the temperature of the refrigerating compartment from being too low during the process of increasing the air humidity in the freezing compartment.

[0008] 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:

[0009] 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;

[0010] Acquire the current temperature of the refrigerating compartment and the current humidity of the freezing compartment, and record the current temperature as the current refrigerating temperature;

[0011] In response to the current refrigeration temperature not dropping to the preset first protection temperature and the current humidity reaching the preset humidity value, the fan is controlled to stop running.

[0012] Optionally, the control method further includes:

[0013] 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 continue to operate, so that the air in the refrigeration compartment only flows to the freezing compartment.

[0014] Optionally, after controlling the refrigeration damper to close, the control method further includes:

[0015] In response to the current humidity in the freezing compartment starting to decrease, the fan is controlled to stop operating.

[0016] Optionally, the control method further includes:

[0017] 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.

[0018] Optionally, the preset humidity value is selected from any value between 80% and 100%.

[0019] Optionally, the control method further includes:

[0020] In response to the current temperature in the freezing compartment rising to a preset second protection temperature, the fan is controlled to stop running.

[0021] Optionally, the step of controlling the operation of the fan includes:

[0022] The fan is controlled to run at a rotation speed with a duty cycle selected from any value between 30% and 90%.

[0023] Optionally, the step of controlling the refrigeration damper to open includes:

[0024] Determining the opening degree of the refrigeration damper according to the current temperature of the evaporator;

[0025] 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.

[0026] Optionally, the fan is arranged in the refrigeration room, and the evaporator is located on the windward side of the fan.

[0027] In a second aspect, the present invention provides a refrigerator, comprising:

[0028] The box body is defined as a freezer compartment, a refrigeration compartment and a refrigerator compartment;

[0029] An evaporator is arranged in the refrigeration room;

[0030] A fan, used for driving the air in the refrigeration compartment to flow toward the freezing compartment and the cold storage compartment;

[0031] A refrigeration damper, used to control the opening and closing of the refrigeration compartment and the cooling compartment;

[0032] 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.

[0033] 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.

[0034] By obtaining the current temperature of the refrigerating compartment and the current humidity of the freezing compartment, the current temperature is recorded as the current refrigerating temperature, and when the current refrigerating temperature has not dropped to the preset first protection temperature and the current humidity has reached the preset humidity value, the fan is controlled to stop running, so that the humidity in the freezing compartment can rise to the preset humidity value, thereby improving the preservation effect of the freezing compartment on the food therein.

[0035] Furthermore, when the current refrigeration temperature drops to the first protection temperature, the refrigeration damper is controlled to be closed, and the fan is controlled to continue to run, so that the air in the refrigeration room only flows to the freezer. It can be understood by those skilled in the art that when the refrigeration damper is just closed, there is still a part of the air from the refrigeration room in the refrigeration room, so that the overall humidity of the air in the refrigeration room is relatively high. At this time, by controlling the fan to continue to run, the air with relatively high humidity in the refrigeration room can continue to flow to the freezer to humidify the freezer.

[0036] Furthermore, when the current humidity in the freezer compartment begins to decrease, it indicates that the air humidity in the refrigeration compartment is substantially equal to that in the freezer compartment, and the evaporator is also performing low-temperature dehumidification on the air passing through it. At this time, by controlling the fan to stop running, dry air can be prevented from entering the freezer compartment, causing the humidity in the freezer compartment to decrease.

[0037] 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

[0038] 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.

[0039] In the attached figure:

[0040] Figure 1 is a schematic block diagram of a refrigerator provided by the present invention;

[0041] Figure 2 This is a schematic diagram of the effect of a refrigerator provided by the present invention;

[0042] Figure 3 yes Figure 2 A schematic cross-sectional view of the middle refrigerator along the AA direction;

[0043] 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;

[0044] Figure 5 is a flow chart of steps for humidifying a freezing compartment in some embodiments of the present invention;

[0045] Figure 6 is a partial step flow chart of a method for controlling air humidity in a refrigerator in other embodiments of the present invention;

[0046] Figure 7It is a schematic block diagram of some components of the refrigerator in the present invention. DETAILED DESCRIPTION

[0047] 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.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] 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 .

[0053] 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.

[0054] 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).

[0055] 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.

[0056] 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.

[0057] 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.

[0058] 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.

[0059] 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.

[0060] 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.

[0061] 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.

[0062] The fan 410 may be a centrifugal fan 410 , an axial flow fan 410 , or a cross-flow fan 410 .

[0063] 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.

[0064] 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.

[0065] 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.

[0066] 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.

[0067] For another example, the refrigeration damper 420 is disposed at the outlet of the refrigeration return air passage 122 .

[0068] 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.

[0069] 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.

[0070] like Figure 4 As shown, in some embodiments of the present invention, the method for controlling the air humidity in a refrigerator includes:

[0071] 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.

[0072] 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.

[0073] 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.

[0074] Step S120, obtaining the current temperature of the refrigerating compartment 120 and the current humidity of the freezing compartment 110, and recording the current temperature as the current refrigerating temperature.

[0075] Since obtaining the current temperature of the refrigerating compartment 120 and the current humidity of the freezing compartment 110 is a conventional technical means in the art, it will not be described in detail here.

[0076] Step S130, in response to the current refrigeration temperature not dropping to the preset first protection temperature and the current humidity reaching the preset humidity value, the fan 410 is controlled to stop running to prevent the humidity in the freezing chamber 110 from being too high and to prevent the freezing chamber 110 from having a large temperature rise.

[0077] 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.

[0078] The preset humidity value is selected from any value between 80% and 100%, such as 80%, 85%, 92%, 98%, 100%, etc.

[0079] Step S140, in response to the current refrigeration temperature dropping to the first protection temperature, the refrigeration damper 420 is controlled to close, and the fan 410 is controlled to stop running to prevent cold air from continuing to enter the refrigeration compartment 120, causing the temperature in the refrigeration compartment 120 to be too low.

[0080] Based on the foregoing description, those skilled in the art can understand that, in some embodiments of the present invention, 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 quickly mixed, 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.

[0081] By obtaining the current temperature of the refrigerating compartment 120 and the current refrigerating temperature of the freezing compartment 110, and when the current refrigerating temperature has not dropped to the preset first protection temperature and the current humidity has reached the preset humidity value, the fan 410 is controlled to stop running, so that the humidity in the freezing compartment 110 can rise to the preset humidity value, thereby improving the preservation effect of the freezing compartment 110 on the food therein.

[0082] Furthermore, if Figure 5 As shown, step S110 may further include:

[0083] Step S111, controlling the fan 410 to run at a speed with a duty cycle selected from any value between 30% and 90%, for example, the duty cycle can be 30%, 45%, 60%, 70%, 85%, 90%, etc.

[0084] Step S112 , determining the opening degree of the refrigeration damper 420 according to the current temperature of the evaporator 240 .

[0085] 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.

[0086] Step S113, controlling the refrigerating damper 420 to open to the opening degree 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, so as to prevent the freezing compartment 110 from heating up when more air comes from the refrigerating compartment 120.

[0087] Among them, step S111 corresponds to the step of "controlling the fan 410 to operate". Steps S112 and S113 correspond to the step of "controlling the refrigeration damper 420 to open".

[0088] 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.

[0089] like Figure 6 As shown, compared with some embodiments described above, in other embodiments of the present invention, step S140 may also be replaced by step S210 and step S220.

[0090] Wherein, step S210 includes, 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 continue to operate, so that the air in the refrigeration compartment 130 only flows to the freezing compartment 110 .

[0091] Those skilled in the art can understand that when the refrigeration damper 420 is just closed, a portion of the air from the refrigeration compartment 120 is still in the refrigeration compartment 130, so that the overall humidity of the air in the refrigeration compartment 130 is relatively high. At this time, by controlling the fan 410 to continue to operate, the air with relatively high humidity in the refrigeration compartment 130 can continue to flow to the freezing compartment 110, so as to humidify the freezing compartment 110.

[0092] Step S220, in response to the current humidity in the freezing chamber 110 starting to decrease, the fan 410 is controlled to stop running.

[0093] Those skilled in the art can understand that when the current humidity in the freezer compartment 110 begins to decrease, it means that the air humidity in the refrigeration compartment 130 is substantially equal to that in the freezer compartment 110, and the evaporator 240 also performs low-temperature dehumidification on the air flowing through it. At this time, by controlling the fan 410 to stop running, dry air can be prevented from entering the freezer compartment 110, resulting in a decrease in the humidity in the freezer compartment 110.

[0094] Continue reading Figure 6 Compared with some embodiments described above, in other embodiments of the present invention, the method for controlling the air humidity in the refrigerator may further include step S230: in response to the current temperature in the freezer compartment 110 rising to a preset second protection temperature, controlling the fan 410 to stop running.

[0095] The second protection temperature is lower than the maximum fresh-keeping temperature set in the freezing chamber 110 to prevent the current temperature in the freezing chamber 110 from rising to the maximum fresh-keeping temperature, thereby causing the compressor 210 to restart, thereby avoiding frequent operation of the compressor 210.

[0096] Furthermore, the second protection temperature can be any feasible temperature lower than the above-mentioned maximum fresh-keeping temperature, such as 1°C, 2°C, 3°C, 5°C, etc.

[0097] For example, the fresh-keeping temperature range of the freezing compartment 110 is -21°C to -16°C. When the temperature of the freezing compartment 110 rises to -16°C, the compressor 210 starts to operate; when the temperature of the freezing compartment 110 drops to -21°C, the compressor 210 stops operating. If the second protection temperature is 2°C less than -16°C, it is -18°C.

[0098] According to the above principle, those skilled in the art may set the second protection temperature to any other feasible value, such as -17°C, -19°C, -20°C, -20.5°C, etc.

[0099] 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.

[0100] Furthermore, if Figure 7 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.

[0101] 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.

[0102] 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.

[0103] 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.

[0104] 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.

[0105] 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 refrigerating compartment and the current humidity of the freezing compartment, and record the current temperature as the current refrigerating temperature; In response to the current refrigeration temperature not dropping to the preset first protection temperature and the current humidity reaching the preset humidity value, the fan is controlled to stop running.

2. 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 continue to operate, so that the air in the refrigeration compartment only flows to the freezing compartment.

3. The control method according to claim 2, after controlling the refrigeration damper to close, the control method further comprises: In response to the current humidity in the freezing compartment starting to decrease, the fan is controlled to stop operating.

4. 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.

5. The control method according to claim 1, wherein: The preset humidity value is selected from any value between 80% and 100%.

6. The control method according to any one of claims 1 to 5, further comprising: In response to the current temperature in the freezing compartment rising to a preset second protection temperature, the fan is controlled to stop running.

7. The control method according to any one of claims 1 to 5, 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%.

8. The control method according to any one of claims 1 to 5, 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.

9. The control method according to any one of claims 1 to 5, wherein: The fan is arranged in the refrigeration room, and the evaporator is located on the windward side of the fan.

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.

Images