Refrigerating system, refrigerator and control method of refrigerator

Abstract

The invention relates to the field of refrigeration technical equipment, in particular to a refrigeration system, a refrigerator and a control method of the refrigerator. The refrigerating system comprises a compressor, an exhaust port of the compressor is connected with an exhaust pipe, an air return port of the compressor is connected with an air return pipe, the exhaust pipe comprises a first pipe section connected with the exhaust port, and the pipe diameter of the first pipe section is smaller than that of the air return pipe. Compared with the prior art, the pipe diameter of the exhaust pipe is adjusted, the pressure difference between exhaust and air return is reduced, and the pressure drop of the air return side and the exhaust side is achieved, so that the pipeline pulsation is reduced, the refrigerant flowing noise of the refrigerating system is effectively reduced, even the eruption sound and the pipeline vibration noise can be reduced, and the sound quality of the refrigerating system and the refrigerator is improved; and meanwhile, the refrigerating effect cannot be greatly influenced.

Description

Technical Field

[0001] The present invention relates to the field of refrigeration technology equipment, and in particular to a refrigeration system, a refrigerator and a refrigerator control method. Background Art

[0002] At present, refrigerators include a refrigeration system, which includes a refrigeration circuit formed by a compressor, a condenser, a throttling component, and an evaporator connected in sequence through pipelines. The refrigerant flows from the compressor to the condenser, the throttling component, the evaporator in sequence, and then returns to the compressor to form a refrigeration cycle. During the operation of the compressor, the refrigerant in the refrigeration circuit will produce large pipeline pulsations during the flow process, resulting in relatively large refrigerant flow noise and vibration, which will increase the overall noise of the refrigerator, affect the noise quality of the refrigerator, and thus lead to a poor user experience.

[0003] However, since the refrigerant flow pipes are distributed in various locations of the refrigerator and the refrigeration system is relatively complex, the issues involved in fluid noise reduction are relatively complex; therefore, how to reduce the refrigerant flow noise without affecting refrigeration is the current technical pain point and has become a bottleneck problem restricting the development of the refrigerator field. Summary of the invention

[0004] In view of the above problems, the present invention is proposed to provide a refrigeration system, a refrigerator and a refrigerator control method that overcome the above problems or at least partially solve the above problems, aiming to solve the problem of large pipeline pulsation in the refrigeration system of the existing refrigerator, so as to achieve the purpose of improving user experience.

[0005] On the one hand, the present invention provides a refrigeration system, which includes a compressor, wherein the exhaust port of the compressor is connected to an exhaust pipe, and the return port of the compressor is connected to a return pipe, the exhaust pipe includes a first pipe section connected to the exhaust port, and the diameter of the first pipe section is smaller than the diameter of the return pipe.

[0006] Optionally, the ratio of the diameter of the first pipe section to the diameter of the return air pipe is 1:2 to 1:3.

[0007] Optionally, the refrigeration system further comprises a condenser;

[0008] The exhaust pipe further includes a second pipe section, the second pipe section is located between the first pipe section and the inlet of the condenser, and the diameter of the second pipe section is equal to the diameter of the first pipe section; or

[0009] The diameter of the second pipe section is not equal to the diameter of the first pipe section.

[0010] Optionally, a portion of the exhaust pipe is distributed in a U shape and another portion is distributed in a serpentine shape;

[0011] The sizes of the pipe section in the exhaust pipe with a U-shape distribution and the pipe section in the serpentine distribution in the horizontal direction are equal or nearly equal.

[0012] Optionally, the refrigeration system further comprises a flow control device with controllable opening, which is used to control the refrigerant flow in the refrigeration system according to the exhaust pressure of the compressor and / or the compartment temperature.

[0013] Optionally, the flow control device is arranged on the exhaust pipe and / or the return pipe;

[0014] The exhaust pipe is provided with a pressure detection device for detecting the exhaust pressure.

[0015] Optionally, the refrigeration system further comprises an evaporator and a throttling device connected to the evaporator;

[0016] The throttling device is a capillary tube.

[0017] The present invention also provides a refrigerator, comprising a refrigeration system as described in any one of the above.

[0018] Optionally, the refrigerator further comprises:

[0019] The temperature detection device is used to detect the compartment temperature in the storage compartment of the refrigerator.

[0020] The present invention also provides a control method for the refrigerator, wherein the refrigerator comprises the refrigeration system as described above;

[0021] The control method comprises:

[0022] Obtaining a preset exhaust pressure value and exhaust pressure; and / or

[0023] Get the compartment temperature and user set temperature;

[0024] In response to the preset exhaust pressure value and the exhaust pressure and / or compartment temperature and the user-set temperature satisfying preset conditions, the opening of the flow control device is reduced to reduce the refrigerant flow in the refrigeration system.

[0025] In the refrigeration system of the present invention, since the diameter of at least part of the exhaust pipe is smaller than that of the return pipe, on the one hand, the gas density at the exhaust end can be made larger and the gas flow rate per unit time can be made smaller, thereby reducing the exhaust pressure and achieving a smaller pressure difference between the exhaust and return gases, thereby achieving a pressure drop between the return gas side and the exhaust side, achieving pulsation attenuation, and reducing pipeline pulsation; on the other hand, the rigidity of the exhaust pipe can also be reduced, thereby reducing the vibration transmission of the pipeline. Therefore, compared with the prior art, the present invention can effectively reduce the refrigerant flow noise of the refrigeration system, and can even reduce the blasting sound and pipeline vibration noise, thereby improving the sound quality of the refrigeration system and the refrigerator, and at the same time will not have a significant impact on the refrigeration effect.

[0026] Therefore, according to the following detailed description of the specific embodiments of the present invention in conjunction with the accompanying drawings, those skilled in the art will be more aware of the above and other objects, advantages and features of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Hereinafter, some specific embodiments of the present invention will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the accompanying drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the accompanying drawings:

[0028] Figure 1 is a schematic working principle diagram of a refrigeration system according to another embodiment of the present invention;

[0029] Figure 2 is a schematic structural diagram of an exhaust pipe according to an embodiment of the present invention;

[0030] Figure 3 is a schematic working principle diagram of a refrigeration system according to another embodiment of the present invention;

[0031] Figure 4 is a schematic flow chart of a refrigerator control method according to an embodiment of the present invention;

[0032] Figure 5 is a schematic flow chart of a refrigerator control method according to an embodiment of the present invention;

[0033] Figure 6 is a schematic flow chart of a refrigerator control method according to an embodiment of the present invention. DETAILED DESCRIPTION

[0034] Refer to the following Figures 1 to 6 The refrigeration system, refrigerator and refrigerator control method of the embodiments of the present invention are described in detail. The directions or positional relationships indicated by “front”, “rear”, “upper”, “lower”, “top”, “bottom”, “inner”, “outer” and “lateral” are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention.

[0035] The terms "first", "second", etc. 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, the features defined as "first", "second", etc. may explicitly or implicitly include at least one of the features, that is, include one or more of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. When a feature "includes or contains" one or some of the features it covers, unless otherwise specifically described, this indicates that other features are not excluded and may further include other features.

[0036] Unless otherwise clearly defined and limited, the terms "installed", "connected", "connected", "fixed", "coupled" and the like 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. A person skilled in the art should be able to understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0037] Figure 1 is a schematic working principle diagram of a refrigeration system according to an embodiment of the present invention, and combined with Figure 2-3 The present invention provides a refrigeration system, which includes a compressor 1, the exhaust port of the compressor 1 is connected to an exhaust pipe 7, the return port of the compressor is connected to a return pipe 8, the exhaust pipe includes a first pipe section 71 connected to the exhaust port, and the pipe diameter of the first pipe section 71 is smaller than the pipe diameter of the return pipe 8.

[0038] The compressor is the heart of the refrigeration system and the power source of refrigeration. The refrigeration system has a refrigeration circuit for circulating refrigerant. The flow path of the refrigerant in the refrigeration circuit is: flowing out from the exhaust port of the compressor 1, and passing through the exhaust pipe 7, the condenser 4, the throttling component, the evaporator 6, the return air pipe 8 in sequence, and then returning to the inside of the compressor 1 through the return air port of the compressor 1. In the prior art, the exhaust pressure on the exhaust side of the compressor 1 is much greater than the return air pressure on the return air side of the compressor 1, and the exhaust pressure is about 10 times the return air pressure. The inventor found through research that the large pressure difference between the exhaust pressure and the return air pressure is the main cause of pipeline pulsation. In other words, the high exhaust pressure is the main cause of pipeline pulsation. Therefore, the present application reduces pipeline pulsation by reducing the exhaust pressure. However, the existing methods or external devices for reducing the exhaust pressure will have a significant adverse effect on the refrigeration effect.

[0039] In this embodiment, since the diameter of at least part of the exhaust pipe section is smaller than that of the return pipe, the gas density at the exhaust end can be made larger and the gas flow rate per unit time can be made smaller, thereby reducing the exhaust pressure and achieving pulsation attenuation. In addition, since the suction pulsation at the return pipe end of the compressor 1 is mainly affected by the capillary 5 of the evaporator 6, it is basically constant. When the return air pressure remains basically unchanged, reducing the exhaust pressure can reduce the pressure difference between the exhaust pressure and the return air pressure of the compressor 1, thereby reducing the pipeline pulsation, and further effectively reducing the refrigerant flow noise, and even the eruption sound. In addition, compared with the prior art, reducing at least part of the diameter of the exhaust pipe can reduce the rigidity and vibration transmission of the exhaust pipe, thereby making it easier to reduce the vibration transmission of all pipes in the refrigeration system.

[0040] In summary, the present invention reduces the pressure difference between exhaust and return air by adjusting the exhaust pipe, thereby achieving a pressure drop on the return air side and the exhaust side, improving the sound quality of the refrigeration system without causing a significant adverse effect on the refrigeration effect.

[0041] In some embodiments of the present invention, the ratio of the diameter of the first pipe section to the diameter of the return air pipe is 1:2 to 1:3.

[0042] For example, the ratio of the diameter of the first pipe section to the diameter of the return air pipe is 1:2 or 1:2.1 or 1:2.2 or 1:2.3 or 1:2.4 or 1:2.5 or 1:2.6 or 1:2.7 or 1:2.8 or 1:2.9 or 1:3.

[0043] In this embodiment, by setting the diameter ratio of the first pipe section 71 to the return air pipe 8 within a specific range, it is more conducive to reducing pipeline pulsation while ensuring that the refrigeration effect of the refrigeration system is not greatly affected as much as possible.

[0044] In some embodiments of the present invention, the refrigeration system further includes a condenser 4. The exhaust pipe 7 further includes a second pipe section 72, which is located between the first pipe section 71 and the inlet of the condenser 4, and has the same diameter as the first pipe section 71.

[0045] Specifically, when the refrigeration system is in operation, the refrigerant flows out from the exhaust port of the compressor 1 , passes through the first pipe section 71 and the second pipe section 72 in sequence, and enters the condenser 4 .

[0046] In this embodiment, the first pipe section 71 and the second pipe section 72 of the exhaust pipe 7 have the same diameter, which is more conducive to the production and manufacturing of the exhaust pipe 7 and can improve the manufacturing efficiency. In addition, compared with the method in which the diameter of the second pipe section 72 is larger than the diameter of the first pipe section 71, the first pipe section 71 and the second pipe section 72 have the same diameter, which can further reduce the exhaust pressure, thereby further reducing the pipeline pulsation, and further reducing the refrigerant flow noise and the eruption sound, so that the refrigeration system has better sound quality.

[0047] In some embodiments of the present invention, the refrigeration system further includes a condenser 4. The exhaust pipe 7 further includes a second pipe section 72, which is located between the first pipe section 71 and the inlet of the condenser 4, and the pipe diameter of the second pipe section 72 is not equal to the pipe diameter of the first pipe section 71.

[0048] For example, the diameter of the second pipe section 72 is larger than the diameter of the first pipe section 71 ; or, the diameter of the second pipe section 72 is smaller than the diameter of the first pipe section 71 .

[0049] In some embodiments of the present invention, a portion of the exhaust pipe 7 is U-distributed and another portion is serpentine-distributed; the U-distributed pipe section and the serpentine-distributed pipe section in the exhaust pipe 7 have equal or nearly equal sizes in the horizontal direction.

[0050] Specifically, the size of the pipe section in the exhaust pipe that is U-shaped in horizontal direction is equal to or nearly equal to the size of the pipe section in the exhaust pipe that is serpentine in horizontal direction. For example: the first pipe section is U-shaped and the second pipe section is serpentine; or the first pipe section is serpentine and the second pipe section is U-shaped.

[0051] In this embodiment, by providing a U-shaped and serpentine structure, it is more conducive to reducing the exhaust pressure, thereby being more conducive to reducing pipeline pulsation, and further improving the sound quality of the refrigeration system.

[0052] It should be noted that the shape and distribution of the exhaust pipe can be set according to specific needs.

[0053] In some embodiments of the present invention, the refrigeration system further comprises a flow control device 3 with controllable opening, which is used to control the refrigerant flow in the refrigeration system according to the exhaust pressure of the compressor and / or the compartment temperature.

[0054] Specifically, "controlling the refrigerant flow in the refrigeration system according to the exhaust pressure of the compressor and / or the compartment temperature" includes the following situations: ① controlling the refrigerant flow in the refrigeration system according to the exhaust pressure of the compressor and the compartment temperature; ② controlling the refrigerant flow in the refrigeration system according to the exhaust pressure of the compressor; ③ controlling the refrigerant flow in the refrigeration system according to the compartment temperature.

[0055] In this embodiment, by setting the flow control device 3, the refrigerant flow in the refrigeration system can be adjusted. When the opening of the flow control device is reduced, the refrigerant flow in the refrigeration system can be reduced, thereby further reducing the exhaust pressure. In addition, in this embodiment, the refrigerant flow in the refrigeration system is controlled according to the exhaust pressure and / or the compartment temperature, which is more conducive to further reducing the exhaust pressure while ensuring that the refrigeration effect is not greatly affected, thereby further reducing the pipeline pulsation, so that the refrigeration system has better sound quality.

[0056] In some embodiments of the present invention, the flow control device 3 is disposed on the exhaust pipe 7 .

[0057] In some embodiments of the present invention, the flow control device 3 is disposed on the air return pipe 8 .

[0058] In some embodiments of the present invention, the flow control device 3 is disposed on the exhaust pipe 7 and the return pipe 8. That is, the exhaust pipe 7 and the return pipe 8 are both provided with the flow control device 3.

[0059] In some embodiments of the present invention, the flow control device 3 is a flow valve.

[0060] In other embodiments of the present invention, the flow control device 3 is a solenoid valve.

[0061] In some embodiments of the present invention, a pressure detection device 2 is provided on the exhaust pipe 7 for detecting the exhaust pressure.

[0062] like Figure 3 As shown, in some embodiments of the present invention, the refrigeration system includes a compressor 1, a pressure detection device 2, a flow control device 3, a condenser 4, a throttling device, and an evaporator 6 which are sequentially connected through pipelines.

[0063] In other embodiments of the present invention, the refrigeration system includes a compressor 1, a flow control device 3, a pressure detection device 2, a condenser 4, a throttling device, and an evaporator 6 which are sequentially connected through pipelines.

[0064] In these embodiments, the valve opening of the flow control device 3 can be controlled according to the exhaust pressure detected by the pressure detection device 2 .

[0065] The exhaust pipe 7 has an exhaust pipe inlet and an exhaust pipe outlet. The exhaust pipe inlet is connected to the exhaust port of the compressor 1, and the exhaust pipe outlet is connected to the inlet of the condenser.

[0066] In some embodiments of the present invention, a welding port 73 is provided on the exhaust pipe 7 for welding connection with the exhaust port of the compressor.

[0067] In some embodiments of the present invention, the refrigeration system further comprises a throttling device and an evaporator 6; the throttling device is connected to the evaporator 6. The throttling device may be a capillary tube or an electronic expansion valve.

[0068] Preferably, the throttling device is a capillary tube.

[0069] In this embodiment, the capillary tube 5 is used as a throttling device, so that the suction pulsation at the return air pipe end of the compressor 1 is mainly affected by the capillary tube 5 of the evaporator 6, and the suction pulsation is basically constant, so that the return air pressure is basically constant.

[0070] In some embodiments of the present invention, the refrigeration system is a refrigeration system of a refrigerator, that is, the refrigeration system can be applied to a refrigerator.

[0071] In some embodiments of the present invention, the refrigeration system is a refrigeration system for a single cooling air conditioner. That is, the refrigeration system can be applied to a single cooling air conditioner.

[0072] The present invention also provides a refrigerator, comprising a refrigeration system as described in any one of the above embodiments.

[0073] In the refrigerator of the present invention, by adjusting the exhaust pipe, the pressure difference between the exhaust and return air is reduced, thereby achieving a pressure drop on the return air side and the exhaust side, improving the sound quality of the refrigerator, and at the same time will not have a significant impact on the refrigeration effect of the refrigerator.

[0074] In some embodiments of the present invention, the refrigerator further comprises a temperature detection device for detecting the compartment temperature in the storage compartment.

[0075] Specifically, the refrigerator includes a storage compartment, and a temperature detection device is disposed in the storage compartment to collect the compartment temperature.

[0076] In some embodiments of the present invention, the refrigerator further includes a controller, the controller includes a memory and a processor, a control program is stored in the memory, and the control program is a control method of the refrigerator when executed by the processor.

[0077] The temperature detection device, the flow control device 3 and the pressure detection device 2 are all connected to the controller. During the operation of the refrigerator, the temperature detection device sends the collected compartment temperature information to the controller, and the pressure detection device 2 sends the collected exhaust pressure information to the controller. The controller can control the valve opening of the flow control device in real time according to the received compartment temperature information and / or exhaust pressure information.

[0078] like Figure 4-6As shown, the present invention also provides a control method for a refrigerator, the refrigerator comprising a refrigeration system. The refrigeration system comprises a compressor 1, the exhaust port of the compressor 1 is connected to an exhaust pipe 7, the return port of the compressor is connected to a return pipe 8, the exhaust pipe comprises a first pipe section 71 connected to the exhaust port, and the first pipe section 71 is smaller than the diameter of the return pipe 8. The refrigeration system also comprises a flow control device 3 with controllable opening, which is used to control the refrigerant flow in the refrigeration system according to the exhaust pressure of the compressor and / or the compartment temperature.

[0079] like Figure 4 As shown, the control method comprises the following steps:

[0080] Step S11, obtaining a preset exhaust pressure value and exhaust pressure.

[0081] Step S12, in response to the preset exhaust pressure value and the exhaust pressure satisfying a preset condition, reducing the opening of the flow control device 3 to reduce the flow of the refrigerant in the refrigeration system.

[0082] like Figure 5 As shown, in some other embodiments of the present invention, the control method of the refrigerator includes the following steps:

[0083] Step S21, obtaining the compartment temperature and the user set temperature.

[0084] Step S22, in response to the compartment temperature and the user set temperature satisfying the preset condition, reducing the opening of the flow control device 3 to reduce the flow of the refrigerant in the refrigeration system.

[0085] like Figure 6 As shown, in some other embodiments of the present invention, the control method includes the following steps:

[0086] Step S31, obtaining a preset exhaust pressure value and exhaust pressure, and obtaining a compartment temperature and a user-set temperature.

[0087] Step S32, in response to the preset exhaust pressure value and the exhaust pressure as well as the compartment temperature and the user-set temperature satisfying the preset conditions, reducing the opening of the flow control device 3 to reduce the flow of the refrigerant in the refrigeration system.

[0088] In the above three embodiments, the refrigeration system has a refrigeration circuit for circulating refrigerant, and a flow control device 3 with controllable opening is provided on the refrigeration circuit.

[0089] The flow path of the refrigerant in the refrigeration circuit is: flowing out from the exhaust port of the compressor 1, passing through the condenser 4, the throttling device, the evaporator 6 in sequence, and then returning to the compressor 1 through the return air port of the compressor 1. The present invention can control the flow of the refrigerant by arranging the flow control device 3 on the refrigeration circuit; specifically, when the opening of the flow control device 3 is reduced, the flow of the refrigerant in the refrigeration circuit can be reduced.

[0090] On the one hand, the present invention adjusts the diameter of the exhaust pipe to reduce the pressure difference between the exhaust and return air, thereby achieving a pressure drop on the return air side and the exhaust side, thereby improving the sound quality of the refrigerator without significantly affecting the refrigeration effect of the refrigerator.

[0091] On the other hand, the present invention reduces the flow rate of the refrigerant in the refrigeration circuit by reducing the opening of the flow control device 3, thereby further reducing the exhaust pressure. Specifically, when the flow rate of the refrigerant in the refrigeration circuit is reduced, the exhaust pressure at the exhaust end of the compressor 1 can be reduced, so that the gas density of the refrigerant in the refrigeration circuit and the change in the gas flow rate per unit time can be changed, so that pulsation attenuation can be achieved and vibration noise can be reduced. In addition, since the suction pulsation at the return air pipe end of the compressor 1 is mainly affected by the capillary 5 of the evaporator 6, it is basically constant. Therefore, when the return air pressure remains basically unchanged, reducing the exhaust pressure can reduce the pressure difference between the exhaust pressure and the return air pressure of the compressor 1, thereby reducing the pipeline pulsation, and then effectively reducing the refrigerant flow noise, and even reducing the eruption sound, thereby improving the sound quality of the refrigerator.

[0092] Furthermore, when the relationship between the preset exhaust pressure value and the exhaust pressure and / or the relationship between the compartment temperature and the user-set temperature meets the preset conditions, the pressure difference between the exhaust pressure and the return air pressure is reduced by reducing the opening of the flow control device 3. Therefore, the present invention can reduce the pipeline pulsation while ensuring that the refrigeration effect of the refrigerator is not greatly affected as much as possible.

[0093] In some embodiments of the present invention, the preset condition includes: the exhaust pressure is greater than a preset exhaust pressure value.

[0094] Specifically, in step S12, when the exhaust pressure is greater than the preset exhaust pressure value, the preset condition is met. At this time, the pressure difference between the exhaust pressure and the return air pressure is large, and the pressure difference is reduced by reducing the opening of the flow control device 3, which can minimize the impact on the refrigeration effect of the refrigerator.

[0095] In some embodiments of the present invention, the preset condition includes: the difference between the compartment temperature and the user-set temperature is less than or equal to a preset value.

[0096] Specifically, in step S22, when the difference between the compartment temperature and the user-set temperature is less than or equal to the preset value, the preset condition is met. At this time, the compartment temperature is close to or equal to the user-set temperature, and the pressure difference between the exhaust pressure and the return air pressure is reduced by reducing the opening of the flow control device 3, which can minimize the impact on the refrigeration effect of the refrigerator.

[0097] In some embodiments of the present invention, the preset conditions include: the exhaust pressure is greater than a preset exhaust pressure value, and the difference between the compartment temperature and the user-set temperature is less than or equal to a preset value.

[0098] Specifically, in step S32, when the exhaust pressure is greater than the preset exhaust pressure value, and the difference between the compartment temperature and the user-set temperature is less than or equal to the preset value, the preset condition is met. At this time, the pressure difference between the exhaust pressure and the return air pressure is large, and the compartment temperature is close to or equal to the user-set temperature. By reducing the opening of the flow control device 3 to reduce the pressure difference, the impact on the refrigerator refrigeration effect can be minimized.

[0099] In this embodiment, when both the exhaust pressure and the compartment temperature meet the preset conditions, the opening of the flow control device 3 is reduced, thereby minimizing the impact on the refrigeration effect of the refrigerator.

[0100] In some embodiments of the present invention, in response to the exhaust pressure being less than or equal to the preset exhaust pressure value, the current opening of the flow control device 3 is controlled to remain unchanged.

[0101] In this embodiment, when the exhaust pressure is less than or equal to the preset exhaust pressure value, the pressure difference between the exhaust pressure and the return air pressure is relatively small. At this time, the current opening of the flow control device 3 is controlled to remain unchanged, so that the flow rate of the refrigerant in the refrigeration circuit remains unchanged, which can reduce the impact on the refrigeration effect of the refrigerator.

[0102] In some embodiments of the present invention, in response to the exhaust pressure being greater than the preset exhaust pressure value and the difference between the compartment temperature and the user-set temperature being greater than a preset value, the current opening of the flow control device 3 is controlled to remain unchanged.

[0103] In this embodiment, when the exhaust pressure is greater than the preset exhaust pressure value, and the difference between the compartment temperature and the user-set temperature is greater than the preset value, it means that the compartment temperature is far from reaching the user-set temperature. At this time, it is necessary to give priority to rapid cooling of the refrigerator. In other words, it is necessary to give priority to ensuring the refrigeration effect of the refrigerator, and then reduce the noise of the refrigerant, thereby ensuring that the refrigeration effect of the refrigerator is not greatly affected.

[0104] In some embodiments of the present invention, reducing the opening of the flow control device 3 includes: gradually reducing the opening of the flow control device 3 so that the flow of the refrigerant decreases at a preset rate, and stopping when the exhaust pressure is adjusted to be equal to or less than the preset exhaust pressure value.

[0105] In this embodiment, the method of gradually reducing the opening of the flow control device 3 is adopted, so that the flow of the refrigerant in the refrigeration circuit can be reduced at a preset rate, so that the exhaust pressure can be gradually reduced and the pipeline pulsation can be gradually reduced, thereby ensuring that the refrigeration effect of the refrigerator is not greatly affected as much as possible.

[0106] In some embodiments of the present invention, the preset rate is 0.5% to 2%.

[0107] For example: the preset rate is 0.5%, 1.0%, 1.5%, 1.8% or 2.0%.

[0108] The preset rate refers to the percentage of the change in the refrigerant flow rate within the preset unit time relative to the initial refrigerant flow rate. The preset unit time is 1 to 100 seconds, for example: it can be 1 second, 2 seconds, 3 seconds, 10 seconds, 20 seconds, 30 seconds, 40 seconds, 60 seconds or 100 seconds; the preset unit time can be selected according to different refrigerator models.

[0109] Preferably, in some embodiments of the present invention, the preset rate is 1%.

[0110] In some embodiments of the present invention, the reducing the opening of the flow control device 3 includes: obtaining the opening of the flow control device 3 to obtain a first opening; controlling the opening of the flow control device 3 to directly adjust from the first opening to the second opening, so that the exhaust pressure is directly reduced to below the preset exhaust pressure value; after a preset time, if the exhaust pressure is still greater than the preset exhaust pressure value, gradually reducing the opening of the flow control device 3, so that the flow of the refrigerant is reduced at a preset rate, and stopping when the exhaust pressure is adjusted to be equal to or less than the preset exhaust pressure value.

[0111] In this embodiment, the second opening is obtained based on experiments or historical data, etc.: the opening is to directly reduce the preset exhaust pressure based on the current working condition to a value below the preset exhaust pressure value. In other words, the second opening refers to a preset opening to directly reduce the preset exhaust pressure based on the current working condition to a value below the preset exhaust pressure value, and the preset opening can be obtained through experiments or through historical data recorded in the refrigerator.

[0112] In some embodiments of the present invention, obtaining the preset exhaust pressure value includes the following steps: obtaining a preset ambient temperature; and obtaining a preset exhaust pressure value that matches the preset ambient temperature.

[0113] Specifically, the preset exhaust pressure value is related to the preset ambient temperature, and the preset exhaust pressure values ​​at different preset ambient temperatures are different. For example, when the preset ambient temperature is the first temperature value, the preset exhaust pressure value is 0.7. When the preset ambient temperature is the second temperature value, the preset exhaust pressure value is 0.6. When the preset ambient temperature is the third temperature value, the preset exhaust pressure value is 0.5.

[0114] In a preferred embodiment of the present invention, the refrigerator control method comprises the following steps:

[0115] Step S41, obtaining a preset ambient temperature.

[0116] Step S42, obtaining a preset exhaust pressure value that matches the preset ambient temperature.

[0117] Step S43, obtaining the actual exhaust pressure of compressor 1.

[0118] Step S44, determining whether the exhaust pressure is greater than a preset exhaust pressure value.

[0119] Step S45: if the exhaust pressure is greater than the preset exhaust pressure value, it is determined whether the difference between the compartment temperature and the user-set temperature is less than or equal to the preset value.

[0120] Step S46: If the exhaust pressure is less than or equal to the preset exhaust pressure value, the current opening of the flow control device 3 is controlled to remain unchanged.

[0121] Step S47: if the difference between the compartment temperature and the user-set temperature is less than or equal to the preset value, the opening of the flow control device 3 is reduced.

[0122] Step S48: If the difference between the compartment temperature and the user-set temperature is greater than a preset value, the current opening of the flow control device 3 is controlled to remain unchanged.

[0123] Further, after step S46 and step S48, the refrigerator control method further includes:

[0124] Step S49, controlling the compressor 1 to operate normally, executing the steps of lowering the temperature, cooling different compartments, and shutting down in the whole cycle; then executing step S43.

[0125] Multiple exemplary embodiments of the present invention, however, without departing from the spirit and scope of the present invention, many other variations or modifications that conform to the principles of the present invention can still be directly determined or derived based on the content disclosed in the present invention. Therefore, the scope of the present invention should be understood and identified as covering all these other variations or modifications.

Claims

1. A refrigeration system, comprising a compressor, an exhaust port of the compressor is connected to an exhaust pipe, and an air return port of the compressor is connected to an air return pipe, characterized in that: The exhaust pipe includes a first pipe section connected to the exhaust port, and a diameter of the first pipe section is smaller than a diameter of the return air pipe.

2. The refrigeration system according to claim 1, characterized in that: The ratio of the diameter of the first pipe section to the diameter of the return air pipe is 1:2 to 1:

3.

3. The refrigeration system according to claim 1, characterized in that: The refrigeration system also includes a condenser; The exhaust pipe further includes a second pipe section, the second pipe section is located between the first pipe section and the inlet of the condenser, and the diameter of the second pipe section is equal to the diameter of the first pipe section; or The diameter of the second pipe section is not equal to the diameter of the first pipe section.

4. The refrigeration system according to claim 1, characterized in that: A portion of the exhaust pipe is U-shaped and another portion is serpentine-shaped; The sizes of the pipe section in the exhaust pipe with a U-shape distribution and the pipe section in the serpentine distribution in the horizontal direction are equal or nearly equal.

5. The refrigeration system according to claim 1, characterized in that: The refrigeration system further comprises a flow control device with controllable opening, which is used to adjust the refrigerant flow in the refrigeration system according to the exhaust pressure of the compressor and / or the compartment temperature.

6. The refrigeration system according to claim 5, characterized in that: The flow control device is arranged on the exhaust pipe and / or the return pipe; The exhaust pipe is provided with a pressure detection device for detecting the exhaust pressure.

7. The refrigeration system according to claim 1, characterized in that: The refrigeration system also includes an evaporator and a throttling device connected to the evaporator; The throttling device is a capillary tube.

8. A refrigerator, characterized in that: A refrigeration system comprising any one of claims 1 to 7.

9. The refrigerator according to claim 8, characterized in that: Also includes: The temperature detection device is used to detect the compartment temperature in the storage compartment of the refrigerator.

10. A method for controlling a refrigerator, characterized in that: The refrigerator comprises a refrigeration system as claimed in claim 5 or 6; The control method comprises: Obtaining a preset exhaust pressure value and exhaust pressure; and / or Get the compartment temperature and user set temperature; In response to the preset exhaust pressure value and the exhaust pressure and / or compartment temperature and the user-set temperature satisfying preset conditions, the opening of the flow control device is reduced to reduce the refrigerant flow in the refrigeration system.

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