Refrigerator and method for controlling rotating speed of fan of refrigerator

Abstract

The invention discloses a refrigerator and a fan rotating speed control method thereof, the refrigerator comprises a box body, a refrigerating system, a sound pressure sensor and a controller, the refrigerating system is arranged in the box body and comprises a compressor, a condenser, an evaporator, a first fan and a bottom air cooler; the sound pressure sensor is arranged at a preset position outside the box body and is used for detecting sound pressure at the preset position; the controller is configured to determine the total rotating speed of the fan of the whole machine according to the sound pressure at the preset position, the current environment temperature and the running period of the refrigerator when the refrigerator starts to run; and the rotating speed of the bottom air cooler is adjusted according to the total rotating speed, and the rotating speed of the first fan is adjusted according to the residual rotating speed and the chamber temperature. On the premise that refrigeration performance and energy consumption are guaranteed, the rotating speed combination with the low noise value at the current environment temperature is output, the overall rotating speed of multiple assemblies of a whole fan is set, the rotating speed of a single fan is distributed according to the actual situation, the noise is stabilized within the required situation, and the noise of the fan is reduced to the maximum extent.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigerators, and in particular to a refrigerator and a method for controlling the rotation speed of a fan thereof. Background Art

[0002] The refrigerator fan is an electric fan located at the back or inside of the refrigerator. Its function is to circulate the air inside the refrigerator, thereby maintaining a uniform temperature inside the refrigerator and accelerating the refrigeration and defrosting inside the refrigerator. Specifically, the refrigerator fan will blow the cooled air from the evaporator to the inside of the refrigerator, thereby keeping the temperature inside the refrigerator lower than the room temperature. At the same time, it can also take out the heat generated inside the refrigerator, thereby improving the refrigeration efficiency of the refrigerator. At the same time, some refrigerator models also have bottom cooling fans, which are placed in the compressor compartment of the product to cool the compressor and ensure the energy consumption requirements of the product. The speed control of the fan in current refrigerator products is usually based on the experience of the base model, or relies on the previous experience of R&D personnel. Therefore, it is impossible to maximize the effective use of the speed, and the excess speed will also bring noise problems. As the fan speed increases, the noise gradually increases, and the high noise will seriously affect the user experience. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a method for controlling the speed of a refrigerator and its fan, output a speed combination with a lower noise value at the current ambient temperature while ensuring refrigeration performance and energy consumption, set the overall speed of multiple components of the whole fan, allocate the speed of the single fan according to actual conditions, stabilize the noise within the required situation, and minimize the fan noise.

[0004] A refrigerator provided in a first embodiment of the present invention includes:

[0005] The box body, which serves as the supporting structure of the refrigerator, has several compartments inside;

[0006] A refrigeration system, which is arranged in the box, includes a compressor, a condenser, an evaporator, a first fan and a bottom cooling fan;

[0007] The compressor is used to provide power for the refrigeration cycle of the refrigerator, compressing the low-temperature, low-pressure refrigerant into a high-temperature, high-pressure refrigerant gas;

[0008] The condenser is used to condense and dissipate heat of high-temperature, high-pressure refrigerant gas, and cool the high-temperature, high-pressure refrigerant gas into a normal-temperature, high-pressure refrigerant liquid;

[0009] The evaporator is used to evaporate and absorb heat from a normal temperature and high pressure refrigerant liquid, and vaporize the normal temperature and high pressure refrigerant liquid into a low temperature and low pressure gas;

[0010] The first fan is used to allow air to enter the evaporator of the refrigerator for heat exchange and send the heat-released air to the refrigerator compartment;

[0011] The bottom cooling fan is arranged inside the compressor compartment and is used to cool the compressor;

[0012] A sound pressure sensor is disposed at a preset position outside the box and is used to detect the sound pressure at the preset position;

[0013] The controller is configured to, when the refrigerator starts to operate, determine the total speed of the fan of the entire machine according to the sound pressure at the preset position detected by the sound pressure sensor, the current ambient temperature and the refrigerator operation cycle; adjust the speed of the bottom cooling fan according to the total speed, and after determining the speed of the bottom cooling fan, adjust the speed of the first fan according to the remaining speed and the compartment temperature.

[0014] In the refrigerator provided by the second embodiment of the present invention, when the refrigerator starts to operate, determining the total speed of the fan of the entire machine according to the sound pressure at the preset position detected by the sound pressure sensor, the current ambient temperature and the operation cycle of the refrigerator specifically includes:

[0015] When the refrigerator starts to operate, the operating cycle of the refrigerator is identified, the sound pressure at the preset position is detected by the sound pressure sensor, and the current ambient temperature is detected by the temperature sensor; wherein the operating cycle of the refrigerator includes a stable operating period, a defrosting recovery period, and a first power-on period;

[0016] The total speed of the fan of the entire machine is determined based on the sound pressure at the preset position detected by the sound pressure sensor, the current ambient temperature and the refrigerator operation cycle; wherein the total speed during the defrost recovery period is greater than the total speed during the stable operation period; the total speed when the power is first turned on is greater than the total speed during the stable operation period; the higher the current ambient temperature, the greater the total speed.

[0017] In the refrigerator provided by the third embodiment of the present invention, the speed of the first fan is adjusted according to the remaining speed and the compartment temperature, specifically including:

[0018] Calculating a remaining speed according to the total speed and the speed of the bottom cooling fan;

[0019] Calculate the absolute value of the difference between the target temperature and the current temperature of each room;

[0020] The speed of the first fan corresponding to each chamber is adjusted according to the residual speed and the absolute value of the difference; wherein, the larger the absolute value of the difference is, the larger the speed of the first fan is.

[0021] In the refrigerator provided in the fourth embodiment of the present invention, the controller is further configured as follows:

[0022] When adjusting the rotation speed of the bottom cooling fan, the bottom cooling fan is controlled to run at a first rotation speed within a first time after the refrigerator is turned on, and the bottom cooling fan is controlled to run at a second rotation speed within a second time after the refrigerator is turned on; wherein the second rotation speed is greater than the first rotation speed;

[0023] When all the compartments have reached the corresponding target temperature, the average speed of the remaining speeds is calculated, and the first fan corresponding to each compartment is controlled to run at the average speed.

[0024] In the refrigerator provided in the fifth embodiment of the present invention, the controller is further configured as follows:

[0025] If the sound pressure sensor detects that the sound pressure at the preset position is greater than the sound pressure when determining the total speed of the fan of the entire machine, the total speed is reduced, and the speeds of the bottom cooling fan and the first fan are re-adjusted according to the new total speed.

[0026] A method for controlling the speed of a refrigerator fan is provided in a sixth embodiment of the present invention. The method is applied to a refrigerator including a cabinet, a refrigeration system and a sound pressure sensor; wherein the refrigeration system includes a compressor, a condenser, an evaporator, a first fan and a bottom cooling fan; the sound pressure sensor is disposed at a preset position outside the cabinet, and is used to detect the sound pressure at the preset position. The method for controlling the speed of a refrigerator fan includes:

[0027] When the refrigerator starts to operate, the total speed of the fan of the entire machine is determined according to the sound pressure at the preset position detected by the sound pressure sensor, the current ambient temperature and the operation cycle of the refrigerator;

[0028] The rotation speed of the bottom cooling fan is adjusted according to the total rotation speed. After the rotation speed of the bottom cooling fan is determined, the rotation speed of the first fan is adjusted according to the remaining rotation speed and the compartment temperature.

[0029] In the method for controlling the speed of a refrigerator fan provided in the seventh embodiment of the present invention, when the refrigerator starts to run, the total speed of the fan of the whole machine is determined according to the sound pressure at the preset position detected by the sound pressure sensor, the current ambient temperature and the refrigerator operation cycle, specifically including:

[0030] When the refrigerator starts to operate, the operating cycle of the refrigerator is identified, the sound pressure at the preset position is detected by the sound pressure sensor, and the current ambient temperature is detected by the temperature sensor; wherein the operating cycle of the refrigerator includes a stable operating period, a defrosting recovery period, and a first power-on period;

[0031] The total speed of the fan of the entire machine is determined based on the sound pressure at the preset position detected by the sound pressure sensor, the current ambient temperature and the refrigerator operation cycle; wherein the total speed during the defrost recovery period is greater than the total speed during the stable operation period; the total speed when the power is first turned on is greater than the total speed during the stable operation period; the higher the current ambient temperature, the greater the total speed.

[0032] In the method for controlling the speed of a refrigerator fan provided by the eighth embodiment of the present invention, the speed of the first fan is adjusted according to the residual speed and the compartment temperature, specifically including:

[0033] Calculating a remaining speed according to the total speed and the speed of the bottom cooling fan;

[0034] Calculate the absolute value of the difference between the target temperature and the current temperature of each room;

[0035] The speed of the first fan corresponding to each chamber is adjusted according to the residual speed and the absolute value of the difference; wherein, the larger the absolute value of the difference is, the larger the speed of the first fan is.

[0036] In the method for controlling the speed of a refrigerator fan provided in the ninth embodiment of the present invention, the method further includes:

[0037] When adjusting the rotation speed of the bottom cooling fan, the bottom cooling fan is controlled to run at a first rotation speed within a first time after the refrigerator is turned on, and the bottom cooling fan is controlled to run at a second rotation speed within a second time after the refrigerator is turned on; wherein the second rotation speed is greater than the first rotation speed;

[0038] When all the compartments have reached the corresponding target temperature, the average speed of the remaining speeds is calculated, and the first fan corresponding to each compartment is controlled to run at the average speed.

[0039] In the method for controlling the speed of a refrigerator fan provided in the tenth embodiment of the present invention, the method further includes:

[0040] If the sound pressure sensor detects that the sound pressure at the preset position is greater than the sound pressure when determining the total speed of the fan of the entire machine, the total speed is reduced, and the speeds of the bottom cooling fan and the first fan are re-adjusted according to the new total speed.

[0041] Compared with the prior art, the beneficial effect of a refrigerator and a method for controlling the speed of its fan provided by an embodiment of the present invention is that: the sound pressure at a preset position is detected by a sound pressure sensor arranged outside the refrigerator body, and when the refrigerator starts to run, the total speed of the fan of the whole machine is determined according to the sound pressure at the preset position detected by the sound pressure sensor, the current ambient temperature and the refrigerator operation cycle; the speed of the bottom cooling fan is adjusted according to the total speed, and after the speed of the bottom cooling fan is determined, the speed of the first fan is adjusted according to the remaining speed and the compartment temperature. The embodiment of the present invention outputs a speed combination with a lower noise value at the current ambient temperature under the premise of ensuring refrigeration performance and energy consumption, sets the overall speed of multiple components of the fan of the whole machine, allocates the speed of the single fan according to the actual situation, stabilizes the noise within the required situation, and minimizes the fan noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 is a structural schematic diagram of a refrigerator provided by an embodiment of the present invention;

[0043] Figure 2 It is a structural schematic diagram of a refrigerator body provided by one embodiment of the present invention;

[0044] Figure 3 It is a structural schematic diagram of a single refrigeration system of a refrigerator provided by an embodiment of the present invention;

[0045] Figure 4 It is a structural schematic diagram of a dual refrigeration system of a refrigerator provided by one embodiment of the present invention;

[0046] Figure 5 is a schematic diagram of the distribution of a sound pressure sensor of a refrigerator provided by an embodiment of the present invention;

[0047] Figure 6 It is a schematic diagram of the process of refrigerator noise correction in the prior art;

[0048] Figure 7 is a first working flow diagram of a controller in a refrigerator provided by an embodiment of the present invention;

[0049] Figure 8 is a second working flow diagram of a controller in a refrigerator provided by an embodiment of the present invention;

[0050] Fig. 9 is a third working flow diagram of a controller in a refrigerator provided by an embodiment of the present invention;

[0051] Fig.10 This is a fourth working flow diagram of a controller in a refrigerator provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0052] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0053] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0054] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0055] In the description of this application, it should be noted that, 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 ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0056] See also Figure 1 , Figure 1 : is a schematic diagram of the structure of a refrigerator provided in one embodiment of the present invention. The refrigerator provided in the embodiment of the present invention comprises:

[0057] The box body 10, which serves as the supporting structure of the refrigerator, is provided with a plurality of compartments inside;

[0058] A refrigeration system 20, which is arranged in the box, includes a compressor, a condenser, an evaporator, a first fan and a bottom cooling fan;

[0059] The compressor is used to provide power for the refrigeration cycle of the refrigerator, compressing the low-temperature, low-pressure refrigerant into a high-temperature, high-pressure refrigerant gas;

[0060] The condenser is used to condense and dissipate heat of high-temperature, high-pressure refrigerant gas, and cool the high-temperature, high-pressure refrigerant gas into a normal-temperature, high-pressure refrigerant liquid;

[0061] The evaporator is used to evaporate and absorb heat from a normal temperature and high pressure refrigerant liquid, and vaporize the normal temperature and high pressure refrigerant liquid into a low temperature and low pressure gas;

[0062] The first fan is used to allow air to enter the evaporator of the refrigerator for heat exchange and send the heat-released air to the refrigerator compartment;

[0063] The bottom cooling fan is arranged inside the compressor compartment and is used to cool the compressor;

[0064] A sound pressure sensor 30, which is disposed at a preset position outside the box and is used to detect the sound pressure at the preset position;

[0065] The controller 40 is configured to, when the refrigerator starts to run, determine the total speed of the fan of the entire machine according to the sound pressure at the preset position detected by the sound pressure sensor, the current ambient temperature and the refrigerator operation cycle; adjust the speed of the bottom cooling fan according to the total speed, and after determining the speed of the bottom cooling fan, adjust the speed of the first fan according to the remaining speed and the compartment temperature.

[0066] Specifically, a refrigerator provided in an embodiment of the present invention includes a cabinet 10, a refrigeration system 20, a sound pressure sensor 30 and a controller 40. Figure 2 , Figure 2 It is a structural schematic diagram of a refrigerator body provided by an embodiment of the present invention. The refrigerator in this embodiment has an approximately rectangular shape, and the refrigerator includes a body 10 that defines a storage space. The body 10 serves as a supporting structure of the refrigerator, and is provided with a chamber inside, wherein the chamber includes a component storage cavity for placing components in the refrigerator, such as a compressor, etc., and also includes a storage space for storing food, etc. The storage space can be divided into a plurality of storage rooms (i.e., compartments), and the storage rooms can be configured as a refrigeration room, a freezing room, and a temperature-changing room (also called a fresh-keeping room) according to different uses. One or more door bodies 200 are provided at the opening of each storage room, for example, Figure 2 The upper storage room is a cold storage room, which is provided with a double-opening door body. The door body 200 includes a door body outer shell 210 located outside the box body 10, a door body inner liner 220 located inside the box body 10, an upper end cover 230, a lower end cover 240, and an insulation layer located between the door body outer shell 210, the door body inner liner 220, the upper end cover 230, and the lower end cover 240; usually, the insulation layer is filled with foam material. The door body can be pivotally arranged at the opening of the box body, and can also be opened in a drawer-like manner to achieve drawer-like storage.

[0067] The refrigerator performs refrigeration operation through the refrigeration system, providing cold energy to the compartment so as to maintain the compartment at a constant low temperature. Specifically, the refrigeration system of the refrigerator in this embodiment can be a single refrigeration system or a dual refrigeration system. Figure 3 , Figure 3 The single refrigeration system of a refrigerator provided in one embodiment of the present invention is a schematic diagram of the structure. The single refrigeration system of the refrigerator described in the embodiment of the present invention comprises a compressor 1, a condenser 2, an anti-condensation tube 3, a drying filter 4, a capillary tube 5, an evaporator 6 and a gas-liquid separator 7, and the working structure of the refrigeration system includes a compression process, a condensation process, a throttling process and an evaporation process.

[0068] The compression process is as follows: plug in the power cord of the refrigerator, and when the refrigerator needs to be cooled, the compressor 1 starts to work, and the low-temperature and low-pressure refrigerant is sucked into the compressor, compressed into high-temperature and high-pressure superheated gas in the cylinder of the compressor 1, and then discharged to the condenser 2;

[0069] The condensation process is as follows: the high-temperature, high-pressure refrigerant gas dissipates heat through the condenser 2, the temperature continues to drop, and is gradually cooled to a saturated vapor at room temperature and high pressure, and further cooled to a saturated liquid, the temperature no longer drops. The temperature at this time is called the condensation temperature, and the pressure of the refrigerant remains almost unchanged during the entire condensation process;

[0070] The throttling process is as follows: the condensed refrigerant saturated liquid is filtered through the drying filter 4 to remove moisture and impurities and then flows into the capillary 5, through which the throttling and pressure reduction are carried out, and the refrigerant becomes wet steam at room temperature and low pressure;

[0071] The evaporation process is as follows: the refrigerant begins to absorb heat and vaporize in the evaporator 6, which not only reduces the temperature of the evaporator and its surroundings, but also turns the refrigerant into a low-temperature, low-pressure gas. The refrigerant coming out of the evaporator 6 passes through the gas-liquid separator 7 and returns to the compressor 1 again. The above process is repeated to transfer the heat in the refrigerator to the air outside the box, thereby achieving the purpose of refrigeration.

[0072] The fan allows air to continuously enter the fins of the evaporator 6 for heat exchange, and at the same time sends the air that becomes cold after the evaporator 6 releases heat to the refrigerator room through the air duct, so that the air in the room continuously circulates and flows, achieving the purpose of lowering the temperature.

[0073] See also Figure 4 , Figure 4: is a structural schematic diagram of a dual refrigeration system of a refrigerator provided by an embodiment of the present invention. The dual refrigeration system of the refrigerator described in the embodiment of the present invention includes a compressor 21 for compressing the refrigerant, a first capillary tube 14a and a second capillary tube 14b for decompressing the refrigerant, a refrigeration evaporator 15a and a freezing evaporator 15b as heat absorption mechanisms, a three-way valve 17 for controlling the refrigerant flow path, a one-way valve 18 for preventing the refrigerant from flowing back, a dryer 19 for removing moisture in the refrigeration cycle, and a refrigerant junction 13 for connecting the refrigerant flow path, which are connected by a pipe 20 to circulate the refrigerant to form a refrigeration cycle. In this process, the fans 12a and 12b respectively provided for each storage room are used to speed up the air flow rate, thereby speeding up the speed at which the refrigeration evaporator and the freezing evaporator absorb heat and improving the refrigeration speed of the storage room. Among them, the three-way valve 17 has a first outflow port 17a and a second outflow port 17b. When the three-way valve 17 is controlled to open the first outflow port 17a, the refrigerant flows sequentially through the first capillary tube 14a, the refrigeration evaporator 15a, the gas-liquid separator 16a, and the refrigerant junction 13, and then returns to the compressor 21. After passing through the first capillary tube 14a, the low-pressure and low-temperature refrigerant flows through the refrigeration evaporator 15a, performs heat exchange with the refrigeration evaporator 15a and the air in the refrigeration chamber 110, and refrigerates the refrigeration chamber 110. Similarly, when the three-way valve 17 is controlled to open the second outflow port 17b, the refrigerant flows sequentially through the second capillary tube 14b, the freezing evaporator 15b, the gas-liquid separator 16b, and the refrigerant junction 13, and then returns to the compressor 21. After passing through the second capillary tube 14b, the low-pressure and low-temperature refrigerant flows through the freezing evaporator 15b, performs heat exchange with the freezing evaporator 15b and the air in the freezing chamber 120, and refrigerates the freezing chamber 120.

[0074] See also Figure 5 , Figure 5 This is a distribution diagram of a sound pressure sensor for a refrigerator provided by an embodiment of the present invention. Based on the NPS feedback of refrigerator products, in the analysis of noise problems reported by users of refrigerator products, it was found that the problem of users perceiving high noise is mainly found on both sides of the refrigerator body. Therefore, according to the NPS feedback, the embodiment of the present invention sets the sound pressure sensor 30 on the left and right sides of the body 10 to detect the sound pressure on both sides of the body. At the same time, the height is set to between 1.5-1.8 meters (the conventional setting is 1.6 meters, which is the position of the human ear set according to the average height statistics), mainly considering that this height is the point where the user's auditory perception is the largest, and the measured data is more accurate. The sound pressure sensor is used to detect the sound pressure at preset positions on both sides of the body, and at the same time, the sound pressure data can be Fourier transformed to obtain the sound pressure data in the frequency domain.

[0075]

[0076] Please note that Figure 6 , Figure 6 It is a flowchart of refrigerator noise correction in the prior art. Environmental noise filtering in the traditional sense is to filter the values ​​higher than the measured noise to avoid affecting the accuracy of the data, but the embodiment of the present invention does not filter these values. The embodiment of the present invention is designed for cold products based on user thinking. If the environmental noise is greater than 10dB, the sound heard by the user is far higher than the product noise, so it will not be considered that the product has a noise problem. The noise below this value will affect the user's judgment and will be superimposed on the noise source to attract the user's attention. Therefore, the embodiment of the present invention filters this part of the noise when measuring the sound pressure level, determines the noise source value of the product, and then controls the fan speed to adjust the noise of the product. In this way, even if the user perceives that the noise is loud, he will not perceive the noise of the product if he listens specifically.

[0077] See also Figure 7 , Figure 7 This is a first working flow chart of a controller in a refrigerator provided by an embodiment of the present invention. In the embodiment of the present invention, when the refrigerator starts to run each time, the total speed of the fan of the whole machine is determined according to the sound pressure at the preset position detected by the sound pressure sensor, the current ambient temperature and the operation cycle of the refrigerator. The speed of the bottom cooling fan is first adjusted according to the total speed of the fan of the whole machine. After the speed of the bottom cooling fan is determined, the speed of the first fan is adjusted according to the remaining speed and the compartment temperature. It should be noted that when the embodiment of the present invention is applied to a refrigerator with multiple refrigeration systems, the number of first fans can be set accordingly according to the number of refrigeration systems. For example, the refrigeration system includes a refrigeration fan, the freezing system includes a freezing fan, and the variable temperature system includes a variable temperature fan. It should be noted that if the total speed decreases, the noise will definitely decrease. If the difference between the ambient noise and the refrigerator noise is large, the refrigerator speed is adjusted to the highest. Then, within this difference range, the noise fluctuation caused by the increase in the fan speed of the refrigerator will also be covered by the ambient noise and will not have any effect. This is because the difference is more than 10dB, and it is difficult to feel the noise of the refrigerator. Even if the speed is increased to the maximum, the noise fluctuation will not exceed 5DB and will not be perceived by the human ear.

[0078] The embodiment of the present invention outputs a speed combination with a lower noise value under the current ambient temperature while ensuring the refrigeration performance and energy consumption, sets the overall speed of multiple components of the whole fan, allocates the speed of the single fan according to the actual situation, stabilizes the noise within the required situation, and minimizes the fan noise.

[0079] As one of the optional embodiments, when the refrigerator starts to run, determining the total speed of the fan of the whole machine according to the sound pressure at the preset position detected by the sound pressure sensor, the current ambient temperature and the operation cycle of the refrigerator specifically includes:

[0080] When the refrigerator starts to operate, the operating cycle of the refrigerator is identified, the sound pressure at the preset position is detected by the sound pressure sensor, and the current ambient temperature is detected by the temperature sensor; wherein the operating cycle of the refrigerator includes a stable operating period, a defrosting recovery period, and a first power-on period;

[0081] The total speed of the fan of the entire machine is determined based on the sound pressure at the preset position detected by the sound pressure sensor, the current ambient temperature and the refrigerator operation cycle; wherein the total speed during the defrost recovery period is greater than the total speed during the stable operation period; the total speed when the power is first turned on is greater than the total speed during the stable operation period; the higher the current ambient temperature, the greater the total speed.

[0082] Specifically, the embodiment of the present invention identifies the operation cycle of the refrigerator each time the refrigerator is started and starts running, detects the sound pressure at a preset position by a sound pressure sensor, and detects the current ambient temperature by a temperature sensor. The operation cycle of the refrigerator includes a stable operation period, a defrost recovery period, and a first power-on period. The total speed of the fan of the whole machine is determined according to the sound pressure at a preset position detected by the sound pressure sensor, the current ambient temperature, and the operation cycle of the refrigerator. The higher the current ambient temperature, the greater the total speed. There are three corresponding cycle states at each ambient temperature, namely, a stable operation period, a defrost recovery period, and a first power-on period, that is, there are three total speed values ​​set at each ambient temperature. At the same ambient temperature, the total speed of the defrost recovery period is greater than the total speed of the stable operation period; the total speed of the first power-on period is greater than the total speed of the stable operation period. The total speed of the defrost recovery period may be equal to the total speed of the first power-on period.

[0083] As one of the optional embodiments, adjusting the speed of the first fan according to the residual speed and the compartment temperature specifically includes:

[0084] Calculating a remaining speed according to the total speed and the speed of the bottom cooling fan;

[0085] Calculate the absolute value of the difference between the target temperature and the current temperature of each room;

[0086] The speed of the first fan corresponding to each chamber is adjusted according to the residual speed and the absolute value of the difference; wherein, the larger the absolute value of the difference is, the larger the speed of the first fan is.

[0087] For details, please refer to Figure 8 , Figure 8This is a second working flow chart of a controller in a refrigerator provided by an embodiment of the present invention. In the embodiment of the present invention, the rotation speed of the bottom cooling fan is first adjusted according to the total rotation speed. After determining the rotation speed of the bottom cooling fan, the remaining rotation speed is calculated according to the total rotation speed and the rotation speed of the bottom cooling fan, that is, the remaining rotation speed = total rotation speed - the rotation speed of the bottom cooling fan. Then, the temperature relationship of each compartment is determined, and the absolute value of the difference between the target temperature and the current temperature of each compartment is calculated. According to the remaining rotation speed and the absolute value of the difference, the rotation speed of the first fan corresponding to each compartment is adjusted. Among them, the larger the absolute value of the difference, the larger the rotation speed of the first fan.

[0088] As one of the optional embodiments, the controller is further configured to:

[0089] When adjusting the rotation speed of the bottom cooling fan, the bottom cooling fan is controlled to run at a first rotation speed within a first time after the refrigerator is turned on, and the bottom cooling fan is controlled to run at a second rotation speed within a second time after the refrigerator is turned on; wherein the second rotation speed is greater than the first rotation speed;

[0090] When all the compartments have reached the corresponding target temperature, the average speed of the remaining speeds is calculated, and the first fan corresponding to each compartment is controlled to run at the average speed.

[0091] Specifically, when adjusting the rotation speed of the bottom cooling fan, the embodiment of the present invention controls the bottom cooling fan to run at a first rotation speed within the first time after the refrigerator is turned on, and controls the bottom cooling fan to run at a second rotation speed within the second time after the refrigerator is turned on. The second rotation speed is greater than the first rotation speed, that is, the bottom cooling fan adopts a lower rotation speed within the time T when the refrigerator is turned on, and adopts a higher rotation speed after the time T. Because the temperature of the compressor compartment has not yet reached the standard when the refrigerator is just started, it will not affect the energy consumption. After the time T, the rotation speed needs to be increased to reduce the temperature of the compressor compartment. Please refer to Fig. 9 , Fig. 9 This is a third working flow diagram of a controller in a refrigerator provided by an embodiment of the present invention. When all compartments reach the corresponding target temperature, the average speed of the remaining speed is calculated, and the first fan corresponding to each compartment is controlled to operate at the average speed. In addition, when a certain compartment reaches the shutdown temperature, the fan corresponding to the compartment that reaches the shutdown temperature is shut down, and the fan speed corresponding to the compartment that does not reach the shutdown temperature is increased. When all compartments reach the shutdown temperature, the fans of all compartments are shut down.

[0092] As one of the optional embodiments, the controller is further configured to:

[0093] If the sound pressure sensor detects that the sound pressure at the preset position is greater than the sound pressure when determining the total speed of the fan of the entire machine, the total speed is reduced, and the speeds of the bottom cooling fan and the first fan are re-adjusted according to the new total speed.

[0094] For details, please refer to Fig.10 , Fig.10 This is the fourth working flow chart of a controller in a refrigerator provided by an embodiment of the present invention. In the embodiment of the present invention, if the sound pressure sensor detects that the sound pressure at the preset position is greater than the sound pressure when determining the total speed of the fan of the whole machine, the total speed is reduced, and the speeds of the bottom cooling fan and the first fan are re-adjusted according to the new total speed. For example, the total speed is set to the third gear, and when the refrigerator is turned on, the total speed is selected as the highest gear of the third gear of 4000 rpm according to the ambient temperature. When the sound pressure sensor detects that the sound pressure is too high, it is reduced to the second gear of 3500 rpm and then distributed. If the sound pressure sensor detects that the sound pressure is low, it can be increased by one gear to ensure the refrigeration performance. In addition, if the specified compartment temperature is not reached within the specified time, the total speed of the fan is increased by one gear.

[0095] The embodiment of the present invention also provides a method for controlling the speed of a refrigerator fan, which is applied to a refrigerator including a box, a refrigeration system and a sound pressure sensor; wherein a plurality of compartments are provided inside the box; the refrigeration system is arranged inside the box, and includes a compressor, a condenser, an evaporator, a first fan and a bottom cooling fan; the compressor is used to provide power for the refrigeration cycle of the refrigerator, and compress the low-temperature, low-pressure refrigerant into a high-temperature, high-pressure refrigerant gas; the condenser is used to condense and dissipate heat for the high-temperature, high-pressure refrigerant gas, and cool the high-temperature, high-pressure refrigerant gas into a normal-temperature, high-pressure refrigerant liquid; the evaporator is used to evaporate and absorb heat for the normal-temperature, high-pressure refrigerant liquid, and vaporize the normal-temperature, high-pressure refrigerant liquid into a low-temperature, low-pressure gas; the first fan is used to allow air to enter the evaporator of the refrigerator for heat exchange and send the heat-released air to the refrigerator compartment; the bottom cooling fan is arranged inside the compressor compartment, and is used to cool the compressor; the sound pressure sensor is arranged at a preset position outside the box, and is used to detect the sound pressure at the preset position. The method for controlling the speed of the refrigerator fan includes:

[0096] S1, when the refrigerator starts to operate, determining the total speed of the fan of the entire machine according to the sound pressure at the preset position detected by the sound pressure sensor, the current ambient temperature and the operation cycle of the refrigerator;

[0097] S2, adjusting the rotation speed of the bottom cooling fan according to the total rotation speed, and after determining the rotation speed of the bottom cooling fan, adjusting the rotation speed of the first fan according to the remaining rotation speed and the compartment temperature.

[0098] In the embodiment of the present invention, when the refrigerator starts to run each time, the total speed of the fan of the whole machine is determined according to the sound pressure at the preset position detected by the sound pressure sensor, the current ambient temperature and the operation cycle of the refrigerator. The speed of the bottom cooling fan is first adjusted according to the total speed of the fan of the whole machine. After the speed of the bottom cooling fan is determined, the speed of the first fan is adjusted according to the remaining speed and the compartment temperature. It should be noted that when the embodiment of the present invention is applied to a refrigerator with multiple refrigeration systems, the number of first fans can be set accordingly according to the number of refrigeration systems. For example, the refrigeration system includes a refrigeration fan, the freezing system includes a freezing fan, and the variable temperature system includes a variable temperature fan. It should be noted that if the total speed decreases, the noise will definitely decrease. If the difference between the ambient noise and the refrigerator noise is large, the speed of the refrigerator is adjusted to the highest. Then, within this difference range, the noise fluctuation caused by the increase in the fan speed of the refrigerator will also be covered by the ambient noise, and there will be no impact. This is because the difference is more than 10dB, and it is difficult to feel the noise of the refrigerator. Even if the speed is increased to the maximum, the noise fluctuation will not exceed 5DB and will not be perceived by the human ear.

[0099] The embodiment of the present invention outputs a speed combination with a lower noise value under the current ambient temperature while ensuring the refrigeration performance and energy consumption, sets the overall speed of multiple components of the whole fan, allocates the speed of the single fan according to the actual situation, stabilizes the noise within the required situation, and minimizes the fan noise.

[0100] As one of the optional embodiments, when the refrigerator starts to run, determining the total speed of the fan of the whole machine according to the sound pressure at the preset position detected by the sound pressure sensor, the current ambient temperature and the operation cycle of the refrigerator specifically includes:

[0101] When the refrigerator starts to operate, the operating cycle of the refrigerator is identified, the sound pressure at the preset position is detected by the sound pressure sensor, and the current ambient temperature is detected by the temperature sensor; wherein the operating cycle of the refrigerator includes a stable operating period, a defrosting recovery period, and a first power-on period;

[0102] The total speed of the fan of the entire machine is determined based on the sound pressure at the preset position detected by the sound pressure sensor, the current ambient temperature and the refrigerator operation cycle; wherein the total speed during the defrost recovery period is greater than the total speed during the stable operation period; the total speed when the power is first turned on is greater than the total speed during the stable operation period; the higher the current ambient temperature, the greater the total speed.

[0103] Specifically, the embodiment of the present invention identifies the operation cycle of the refrigerator each time the refrigerator is started and starts running, detects the sound pressure at a preset position by a sound pressure sensor, and detects the current ambient temperature by a temperature sensor. The operation cycle of the refrigerator includes a stable operation period, a defrost recovery period, and a first power-on period. The total speed of the fan of the whole machine is determined according to the sound pressure at a preset position detected by the sound pressure sensor, the current ambient temperature, and the operation cycle of the refrigerator. The higher the current ambient temperature, the greater the total speed. There are three corresponding cycle states at each ambient temperature, namely, a stable operation period, a defrost recovery period, and a first power-on period, that is, there are three total speed values ​​set at each ambient temperature. At the same ambient temperature, the total speed of the defrost recovery period is greater than the total speed of the stable operation period; the total speed of the first power-on period is greater than the total speed of the stable operation period. The total speed of the defrost recovery period may be equal to the total speed of the first power-on period.

[0104] As one of the optional embodiments, adjusting the speed of the first fan according to the residual speed and the compartment temperature specifically includes:

[0105] Calculating a remaining speed according to the total speed and the speed of the bottom cooling fan;

[0106] Calculate the absolute value of the difference between the target temperature and the current temperature of each room;

[0107] The speed of the first fan corresponding to each chamber is adjusted according to the residual speed and the absolute value of the difference; wherein, the larger the absolute value of the difference is, the larger the speed of the first fan is.

[0108] Specifically, the embodiment of the present invention first adjusts the speed of the bottom cooling fan according to the total speed. After determining the speed of the bottom cooling fan, the remaining speed is calculated according to the total speed and the speed of the bottom cooling fan, that is, the remaining speed = total speed - the speed of the bottom cooling fan. Then, the temperature relationship of each room is determined, and the absolute value of the difference between the target temperature and the current temperature of each room is calculated. According to the remaining speed and the absolute value of the difference, the speed of the first fan corresponding to each room is adjusted. Among them, the larger the absolute value of the difference, the larger the speed of the first fan.

[0109] As an optional embodiment, the method further includes:

[0110] When adjusting the rotation speed of the bottom cooling fan, the bottom cooling fan is controlled to run at a first rotation speed within a first time after the refrigerator is turned on, and the bottom cooling fan is controlled to run at a second rotation speed within a second time after the refrigerator is turned on; wherein the second rotation speed is greater than the first rotation speed;

[0111] When all the compartments have reached the corresponding target temperature, the average speed of the remaining speeds is calculated, and the first fan corresponding to each compartment is controlled to run at the average speed.

[0112] Specifically, in the embodiment of the present invention, when adjusting the rotation speed of the bottom cooling fan, the bottom cooling fan is controlled to run at the first rotation speed within the first time after the refrigerator is turned on, and the bottom cooling fan is controlled to run at the second rotation speed within the second time after the refrigerator is turned on. Among them, the second rotation speed is greater than the first rotation speed, that is, the bottom cooling fan adopts a lower rotation speed within the T moment when the refrigerator is turned on, and the bottom cooling fan adopts a higher rotation speed after the T moment. Because the temperature of the compressor compartment has not yet reached the standard when the refrigerator is just started, it will not affect the energy consumption. After the T moment, the rotation speed needs to be increased to reduce the temperature of the compressor compartment. When all compartments reach the corresponding target temperature, the average rotation speed of the remaining rotation speed is calculated, and the first fan corresponding to each compartment is controlled to run at the average rotation speed. In addition, when a certain compartment reaches the shutdown temperature, the fan corresponding to the compartment that reaches the shutdown temperature is shut down, and the fan speed corresponding to the compartment that does not reach the shutdown temperature is increased. When all compartments reach the shutdown temperature, the fans of all compartments are shut down.

[0113] As an optional embodiment, the method further includes:

[0114] If the sound pressure sensor detects that the sound pressure at the preset position is greater than the sound pressure when determining the total speed of the fan of the entire machine, the total speed is reduced, and the speeds of the bottom cooling fan and the first fan are re-adjusted according to the new total speed.

[0115] Specifically, in the embodiment of the present invention, if the sound pressure sensor detects that the sound pressure at the preset position is greater than the sound pressure when determining the total speed of the fan of the whole machine, the total speed is reduced, and the speeds of the bottom cooling fan and the first fan are re-adjusted according to the new total speed. For example, the total speed is set to the third gear, and the total speed is selected as the highest gear of the third gear of 4000 rpm according to the ambient temperature when the refrigerator is turned on. When the sound pressure sensor detects that the sound pressure is too high, it is reduced to the second gear of 3500 rpm and then distributed. If the sound pressure sensor detects that the sound pressure is low, it can be increased by one gear to ensure the refrigeration performance. In addition, if the specified compartment temperature is not reached within the specified time, the total speed of the fan is increased by one gear.

[0116] The embodiment of the present invention provides a method for controlling the speed of a refrigerator and its fan. The sound pressure at a preset position is detected by a sound pressure sensor arranged outside the refrigerator body. When the refrigerator starts to operate, the total speed of the fan of the whole machine is determined according to the sound pressure at the preset position detected by the sound pressure sensor, the current ambient temperature and the refrigerator operation cycle; the speed of the bottom cooling fan is adjusted according to the total speed. After the speed of the bottom cooling fan is determined, the speed of the first fan is adjusted according to the remaining speed and the compartment temperature. The embodiment of the present invention outputs a speed combination with a lower noise value at the current ambient temperature under the premise of ensuring refrigeration performance and energy consumption, sets the overall speed of multiple components of the fan of the whole machine, allocates the speed of the single fan according to the actual situation, stabilizes the noise within the required situation, and minimizes the fan noise.

[0117] It should be noted that the system embodiment described above is merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. In addition, in the drawings of the system embodiment provided by the present invention, the connection relationship between the modules indicates that there is a communication connection between them, which may be specifically implemented as one or more communication buses or signal lines. A person of ordinary skill in the art may understand and implement it without paying any creative effort.

[0118] The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A refrigerator, characterized in that: include: The box body, which serves as the supporting structure of the refrigerator, has several compartments inside; A refrigeration system, which is arranged in the box, includes a compressor, a condenser, an evaporator, a first fan and a bottom cooling fan; The compressor is used to provide power for the refrigeration cycle of the refrigerator, compressing the low-temperature, low-pressure refrigerant into a high-temperature, high-pressure refrigerant gas; The condenser is used to condense and dissipate heat of high-temperature, high-pressure refrigerant gas, and cool the high-temperature, high-pressure refrigerant gas into a normal-temperature, high-pressure refrigerant liquid; The evaporator is used to evaporate and absorb heat from a normal temperature and high pressure refrigerant liquid, and vaporize the normal temperature and high pressure refrigerant liquid into a low temperature and low pressure gas; The first fan is used to allow air to enter the evaporator of the refrigerator for heat exchange and send the heat-released air to the refrigerator compartment; The bottom cooling fan is arranged inside the compressor compartment and is used to cool the compressor; A sound pressure sensor is disposed at a preset position outside the box and is used to detect the sound pressure at the preset position; The controller is configured to, when the refrigerator starts to operate, determine the total speed of the fan of the entire machine according to the sound pressure at the preset position detected by the sound pressure sensor, the current ambient temperature and the refrigerator operation cycle; adjust the speed of the bottom cooling fan according to the total speed, and after determining the speed of the bottom cooling fan, adjust the speed of the first fan according to the remaining speed and the compartment temperature.

2. The refrigerator according to claim 1, characterized in that: When the refrigerator starts to run, determining the total speed of the fan of the entire machine according to the sound pressure at the preset position detected by the sound pressure sensor, the current ambient temperature and the operation cycle of the refrigerator specifically includes: When the refrigerator starts to operate, the operating cycle of the refrigerator is identified, the sound pressure at the preset position is detected by the sound pressure sensor, and the current ambient temperature is detected by the temperature sensor; wherein the operating cycle of the refrigerator includes a stable operating period, a defrosting recovery period, and a first power-on period; The total speed of the fan of the entire machine is determined based on the sound pressure at the preset position detected by the sound pressure sensor, the current ambient temperature and the refrigerator operation cycle; wherein the total speed during the defrost recovery period is greater than the total speed during the stable operation period; the total speed when the power is first turned on is greater than the total speed during the stable operation period; the higher the current ambient temperature, the greater the total speed.

3. The refrigerator according to claim 2, characterized in that: The adjusting the speed of the first fan according to the remaining speed and the compartment temperature specifically includes: Calculating a remaining speed according to the total speed and the speed of the bottom cooling fan; Calculate the absolute value of the difference between the target temperature and the current temperature of each room; The speed of the first fan corresponding to each chamber is adjusted according to the residual speed and the absolute value of the difference; wherein, the larger the absolute value of the difference is, the larger the speed of the first fan is.

4. The refrigerator according to claim 3, characterized in that: The controller is also configured to: When adjusting the rotation speed of the bottom cooling fan, the bottom cooling fan is controlled to run at a first rotation speed within a first time after the refrigerator is turned on, and the bottom cooling fan is controlled to run at a second rotation speed within a second time after the refrigerator is turned on; wherein the second rotation speed is greater than the first rotation speed; When all the compartments have reached the corresponding target temperature, the average speed of the remaining speeds is calculated, and the first fan corresponding to each compartment is controlled to run at the average speed.

5. The refrigerator according to claim 4, characterized in that: The controller is also configured to: If the sound pressure sensor detects that the sound pressure at the preset position is greater than the sound pressure when determining the total speed of the fan of the entire machine, the total speed is reduced, and the speeds of the bottom cooling fan and the first fan are re-adjusted according to the new total speed.

6. A method for controlling the speed of a refrigerator fan, characterized in that: The method is applied to a refrigerator including a box, a refrigeration system and a sound pressure sensor; wherein the refrigeration system includes a compressor, a condenser, an evaporator, a first fan and a bottom cooling fan; the sound pressure sensor is arranged at a preset position outside the box, and is used to detect the sound pressure at the preset position. The method for controlling the speed of the refrigerator fan includes: When the refrigerator starts to operate, the total speed of the fan of the entire machine is determined according to the sound pressure at the preset position detected by the sound pressure sensor, the current ambient temperature and the operation cycle of the refrigerator; The rotation speed of the bottom cooling fan is adjusted according to the total rotation speed. After the rotation speed of the bottom cooling fan is determined, the rotation speed of the first fan is adjusted according to the remaining rotation speed and the compartment temperature.

7. The method for controlling the speed of a refrigerator fan according to claim 6, characterized in that: When the refrigerator starts to run, determining the total speed of the fan of the entire machine according to the sound pressure at the preset position detected by the sound pressure sensor, the current ambient temperature and the operation cycle of the refrigerator specifically includes: When the refrigerator starts to operate, the operating cycle of the refrigerator is identified, the sound pressure at the preset position is detected by the sound pressure sensor, and the current ambient temperature is detected by the temperature sensor; wherein the operating cycle of the refrigerator includes a stable operating period, a defrosting recovery period, and a first power-on period; The total speed of the fan of the entire machine is determined based on the sound pressure at the preset position detected by the sound pressure sensor, the current ambient temperature and the refrigerator operation cycle; wherein the total speed during the defrost recovery period is greater than the total speed during the stable operation period; the total speed when the power is first turned on is greater than the total speed during the stable operation period; the higher the current ambient temperature, the greater the total speed.

8. The method for controlling the speed of a refrigerator fan according to claim 7, characterized in that: The adjusting the speed of the first fan according to the remaining speed and the compartment temperature specifically includes: Calculating a remaining speed according to the total speed and the speed of the bottom cooling fan; Calculate the absolute value of the difference between the target temperature and the current temperature of each room; The speed of the first fan corresponding to each chamber is adjusted according to the residual speed and the absolute value of the difference; wherein, the larger the absolute value of the difference is, the larger the speed of the first fan is.

9. The method for controlling the speed of a refrigerator fan according to claim 8, characterized in that: The method further comprises: When adjusting the rotation speed of the bottom cooling fan, the bottom cooling fan is controlled to run at a first rotation speed within a first time after the refrigerator is turned on, and the bottom cooling fan is controlled to run at a second rotation speed within a second time after the refrigerator is turned on; wherein the second rotation speed is greater than the first rotation speed; When all the compartments have reached the corresponding target temperature, the average speed of the remaining speeds is calculated, and the first fan corresponding to each compartment is controlled to run at the average speed.

10. The method for controlling the speed of a refrigerator fan according to claim 9, characterized in that: The method further comprises: If the sound pressure sensor detects that the sound pressure at the preset position is greater than the sound pressure when determining the total speed of the fan of the entire machine, the total speed is reduced, and the speeds of the bottom cooling fan and the first fan are re-adjusted according to the new total speed.

Images