Refrigerator and control method thereof

Abstract

The invention relates to the field of refrigeration technical equipment, in particular to a refrigerator and a control method thereof. The refrigerator comprises a refrigerating system, the refrigerating system is provided with a refrigerating loop allowing a refrigerant to circularly flow, and a flow control device with the controllable opening degree is arranged on the refrigerating loop. The control method comprises the steps that a preset exhaust pressure value and exhaust pressure are obtained; and / or acquiring a chamber temperature and a temperature set by a user; and in response to the situation that the preset exhaust pressure value, the exhaust pressure and / or the chamber temperature and the user set temperature meet the preset conditions, the opening degree of the flow control device is reduced, so that the flow of a refrigerant in the refrigerating circuit is reduced. The exhaust pressure is reduced by reducing the opening degree of the flow control device, and the pressure difference value between the exhaust pressure and the air return pressure of the compressor can be reduced, so that the pipeline pulsation can be reduced, the refrigerant flowing noise can be effectively reduced, even the eruption sound can be reduced, and the sound quality of the refrigerator is improved; and the refrigeration effect of the refrigerator is not greatly influenced as much as possible.

Description

Technical Field

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

[0002] At present, refrigerators include a refrigeration system, which includes a refrigeration circuit formed by a compressor, a condenser, a throttling device, and an evaporator connected in sequence through pipelines. The refrigerant flows from the compressor to the condenser, the throttling device, 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 refrigerator and a control method thereof 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] In one aspect, the present invention provides a control method for a refrigerator, wherein the refrigerator comprises a refrigeration system, the refrigeration system comprises a refrigeration circuit for circulating a refrigerant, and the refrigeration circuit is provided with a flow control device with a controllable opening;

[0006] The control method comprises:

[0007] Obtaining a preset exhaust pressure value and exhaust pressure; and / or

[0008] Get the compartment temperature and user set temperature;

[0009] 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 flow of the refrigerant in the refrigeration circuit.

[0010] Optionally, the preset condition includes: the exhaust pressure is greater than the preset exhaust pressure value.

[0011] Optionally, the preset condition further includes: a difference between the compartment temperature and the user-set temperature is less than or equal to a preset value.

[0012] Optionally, in response to the exhaust pressure being less than or equal to the preset exhaust pressure value, or 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 is controlled to remain unchanged.

[0013] Optionally, reducing the opening of the flow control device includes:

[0014] The opening of the flow control device is gradually reduced so that the flow of the refrigerant is reduced at a preset rate, and the process stops when the exhaust pressure is adjusted to be equal to or less than the preset exhaust pressure value.

[0015] Optionally, the preset rate is 0.5% to 2%.

[0016] Optionally, reducing the opening of the flow control device includes:

[0017] Acquiring the opening of the flow control device to obtain a first opening;

[0018] Controlling the opening of the flow control device to be directly adjusted from a first opening to a second opening, so that the exhaust pressure is directly reduced to below the preset exhaust pressure value;

[0019] After the preset time, if the exhaust pressure is still greater than the preset exhaust pressure value,

[0020] The opening of the flow control device is gradually reduced so that the flow of the refrigerant is reduced at a preset rate, and the process stops when the exhaust pressure is adjusted to be equal to or less than the preset exhaust pressure value.

[0021] Optionally, the refrigeration system further comprises a compressor, and the compressor is connected to an exhaust pipe and a return pipe;

[0022] The flow control device is installed on the exhaust pipe; and / or

[0023] The flow control device is installed on the air return pipe.

[0024] Optionally, obtaining the preset exhaust pressure value includes:

[0025] Get the preset ambient temperature;

[0026] The preset exhaust pressure value matching the preset ambient temperature is obtained.

[0027] On the other hand, the present invention also provides a refrigerator, including a controller, the controller including a memory and a processor, the memory storing a control program, and the control program, when executed by the processor, is used to implement the refrigerator control method as described in any one of the above.

[0028] In the control method of the present invention, by reducing the opening of the flow control device, the flow of the refrigerant in the refrigeration circuit can be reduced, thereby reducing the exhaust pressure at the exhaust end of the compressor, and changing the gas density of the refrigerant in the refrigeration circuit and the change in the gas flow per unit time, thereby achieving pulsation attenuation and reducing vibration noise. In addition, since the suction pulsation at the return air pipe end of the compressor is mainly affected by the evaporator capillary tube, 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, 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.

[0029] 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. 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.

[0030] 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

[0031] 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:

[0032] Figure 1 is a schematic flow chart of a method for controlling a refrigerator according to an embodiment of the present invention;

[0033] Figure 2 is a schematic flow chart of a method for controlling a refrigerator according to another embodiment of the present invention;

[0034] Figure 3 is a schematic flow chart of a method for controlling a refrigerator according to another embodiment of the present invention;

[0035] Figure 4 is a schematic flow chart of a method for controlling a refrigerator according to another embodiment of the present invention;

[0036] Figure 5 is a schematic working principle diagram of a refrigeration system of a refrigerator according to another embodiment of the present invention. DETAILED DESCRIPTION

[0037] Refer to the following Figures 1 to 5 The control method of the refrigerator and the refrigerator of the embodiment of the present invention are described. The directions or positional relationships indicated by "front", "rear", "upper", "lower", "top", "bottom", "inner", "outer", "lateral", etc. 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 device or element 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.

[0038] 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.

[0039] 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.

[0040] Figure 1 is a schematic flow chart of a refrigerator control method according to an embodiment of the present invention, and Figure 2-5 The present invention provides a control method for a refrigerator, wherein the refrigerator comprises a refrigeration system, the refrigeration system having a refrigeration circuit for circulating a refrigerant, and the refrigeration circuit is provided with a flow control device 3 with a controllable opening.

[0041] The control method comprises the following steps:

[0042] Step S11, obtaining a preset exhaust pressure value and exhaust pressure.

[0043] 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 circuit.

[0044] In this embodiment, 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.

[0045] When the flow rate of the refrigerant in the refrigeration circuit decreases, the exhaust pressure at the exhaust end of the compressor 1 can be reduced, thereby changing the gas density of the refrigerant in the refrigeration circuit and the change in the gas flow rate per unit time, thereby achieving pulsation attenuation and reducing vibration noise. In addition, since 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, 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.

[0046] Furthermore, when the relationship between the preset exhaust pressure value and the exhaust pressure satisfies the preset condition, 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 pipeline pulsation while ensuring that the refrigeration effect of the refrigerator is not greatly affected as much as possible.

[0047] like Figure 2 As shown, in some embodiments of the present invention, the refrigerator includes a refrigeration system, the refrigeration system has a refrigeration circuit for circulating refrigerant, and the refrigeration circuit is provided with a flow control device 3 with controllable opening.

[0048] The control method comprises the following steps:

[0049] Step S21, obtaining the compartment temperature and the user set temperature.

[0050] 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 circuit.

[0051] In this embodiment, 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.

[0052] On the one hand, 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 is basically constant. On the other hand, when the flow rate of the refrigerant in the refrigeration circuit decreases, the exhaust pressure at the exhaust end of the compressor 1 can be reduced, thereby changing the gas density of the refrigerant in the refrigeration circuit and the change in the gas flow rate per unit time, thereby achieving pulsation attenuation and reducing vibration noise. 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.

[0053] Furthermore, when the relationship between the compartment temperature and the user-set temperature meets the preset condition, the pressure difference between the exhaust pressure and the return 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.

[0054] like Figure 3 As shown, in some embodiments of the present invention, the refrigerator includes a refrigeration system, the refrigeration system has a refrigeration circuit for circulating refrigerant, and the refrigeration circuit is provided with a flow control device 3 with controllable opening.

[0055] The control method comprises the following steps:

[0056] Step S31, obtaining a preset exhaust pressure value and exhaust pressure, and obtaining a compartment temperature and a user-set temperature.

[0057] 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 circuit.

[0058] In this embodiment, 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.

[0059] When the flow rate of the refrigerant in the refrigeration circuit decreases, the exhaust pressure at the exhaust end of the compressor 1 can be reduced, thereby changing the gas density of the refrigerant in the refrigeration circuit and the change in the gas flow rate per unit time, thereby achieving pulsation attenuation and reducing vibration noise. In addition, since 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, 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.

[0060] In this embodiment, when the relationship between the preset exhaust pressure value and the exhaust pressure and the relationship between the compartment temperature and the user-set temperature both meet 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.

[0061] Furthermore, compared with the above method of only using "the relationship between the preset exhaust pressure value and the exhaust pressure" or "the relationship between the compartment temperature and the user-set temperature" as the method for judging whether the preset conditions are met; in this embodiment, "the relationship between the preset exhaust pressure value and the exhaust pressure" and "the relationship between the compartment temperature and the user-set temperature" are simultaneously used as factors for judging whether the preset conditions are met, which can further avoid affecting the refrigeration effect of the refrigerator.

[0062] In some embodiments of the present invention, the preset condition includes: the exhaust pressure is greater than a preset exhaust pressure value.

[0063] 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.

[0064] 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.

[0065] 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.

[0066] 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.

[0067] 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.

[0068] 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.

[0069] 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.

[0070] 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.

[0071] In some embodiments of the present invention, in response to 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.

[0072] In this embodiment, when 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.

[0073] 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 is controlled to remain unchanged.

[0074] That is, 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, the current opening of the flow control device is controlled to remain unchanged.

[0075] 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.

[0076] 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.

[0077] In some embodiments of the present invention, the preset rate is 0.5% to 2%.

[0078] For example: the preset rate is 0.5%, 1.0%, 1.5%, 1.8% or 2.0%.

[0079] 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.

[0080] Preferably, in some embodiments of the present invention, the preset rate is 1%.

[0081] In some embodiments of the present invention, the reducing the opening of the flow control device 3 includes the following steps: acquiring 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.

[0082] In this embodiment, the second opening refers to a preset opening in which the exhaust pressure preset based on the current operating conditions is directly reduced to below the preset exhaust pressure value. The preset opening can be obtained through experiments or through historical data recorded in the refrigerator.

[0083] In some embodiments of the present invention, the refrigeration system further comprises a compressor 1, and an exhaust pipe and a return pipe are connected to the compressor 1. The flow control device 3 is installed on the exhaust pipe.

[0084] In some embodiments of the present invention, the refrigeration system further comprises a compressor 1, and the compressor 1 is connected with an exhaust pipe and a return pipe. The flow control device 3 is installed on the return pipe.

[0085] In some embodiments of the present invention, the refrigeration system further comprises a compressor 1, and the compressor 1 is connected to an exhaust pipe and a return pipe. The flow control device 3 is installed on both the return pipe and the exhaust pipe.

[0086] 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.

[0087] 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.

[0088] like Figure 4 As shown, in a preferred embodiment of the present invention, the refrigerator control method includes the following steps:

[0089] Step S41, obtaining a preset ambient temperature.

[0090] Step S42, obtaining a preset exhaust pressure value that matches the preset ambient temperature.

[0091] Step S43, obtaining the actual exhaust pressure of compressor 1.

[0092] Step S44, determining whether the exhaust pressure is greater than a preset exhaust pressure value.

[0093] 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.

[0094] 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.

[0095] 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.

[0096] 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.

[0097] Further, after step S46 and step S48, the refrigerator control method further includes:

[0098] 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.

[0099] like Figure 5 As shown, in some control methods of the present invention, the refrigeration system of the refrigerator includes a throttling device.

[0100] Preferably, the throttling device is a capillary tube 5 .

[0101] 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.

[0102] In some embodiments of the present invention, the flow control device 3 is a flow valve.

[0103] In other embodiments of the present invention, the flow control device 3 is a solenoid valve.

[0104] like Figure 5 As shown, in some embodiments of the present invention, the refrigeration system of the refrigerator includes a compressor 1, a condenser 4, a throttling device, and an evaporator 6 which are sequentially connected through pipelines.

[0105] like Figure 5 As shown, in some embodiments of the present invention, the refrigerator further includes a pressure sensor 2, and the pressure sensor 2 is disposed on the exhaust pipe of the compressor 1 for detecting the exhaust pressure.

[0106] In some embodiments of the present invention, the pressure sensor 2 and the flow control device 3 are arranged between the compressor 1 and the condenser 4. The pressure sensor 2 is close to the compressor 1, and the flow control device 3 is close to the condenser 4.

[0107] like Figure 5 As shown, when the compressor 1 is running, the refrigerant flows out from the exhaust port of the compressor 1, passes through the pressure sensor 2, the flow control device 3, the condenser 4, the capillary tube 5, the evaporator 6 in sequence, and finally returns to the compressor 1 through the return air pipe.

[0108] In some embodiments of the present invention, the refrigerator further includes a temperature detection device.

[0109] Specifically, the refrigerator includes a storage compartment, and the temperature detection device is arranged in the storage compartment to detect the compartment temperature in the storage compartment.

[0110] The present invention also provides a refrigerator, comprising a controller, the controller comprising a memory and a processor, the memory storing a control program, and the control program, when executed by the processor, is used to implement a control method for the refrigerator as described in any one of the above.

[0111] 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 control method for a refrigerator, the refrigerator comprising a refrigeration system, the refrigeration system having a refrigeration circuit for circulating a refrigerant, characterized in that: The refrigeration circuit is provided with a flow control device with controllable opening; 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 flow of the refrigerant in the refrigeration circuit.

2. The control method according to claim 1, characterized in that: The preset condition includes: the exhaust pressure is greater than the preset exhaust pressure value.

3. The control method according to claim 2, characterized in that: The preset condition also includes: the difference between the compartment temperature and the user-set temperature is less than or equal to a preset value.

4. The control method according to claim 3, characterized in that: In response to the exhaust pressure being less than or equal to the preset exhaust pressure value, or 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 is controlled to remain unchanged.

5. The control method according to claim 1, characterized in that: The reducing the opening of the flow control device comprises: The opening of the flow control device is gradually reduced so that the flow of the refrigerant is reduced at a preset rate, and the process stops when the exhaust pressure is adjusted to be equal to or less than the preset exhaust pressure value.

6. The control method according to claim 1, characterized in that: The reducing the opening of the flow control device comprises: Acquiring the opening of the flow control device to obtain a first opening; Controlling the opening of the flow control device to be directly adjusted from a first opening to a 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 reduce the opening of the flow control device so that the flow of the refrigerant decreases at a preset rate, and stop when the exhaust pressure is adjusted to be equal to or less than the preset exhaust pressure value.

7. The control method according to claim 5 or 6, characterized in that: The preset rate is 0.5% to 2%.

8. The control method according to claim 1, characterized in that: The refrigeration system further comprises a compressor, and the compressor is connected with an exhaust pipe and a return pipe; The flow control device is installed on the exhaust pipe; and / or The flow control device is installed on the air return pipe.

9. The control method according to claim 1, characterized in that: Obtaining the preset exhaust pressure value includes: Get the preset ambient temperature; The preset exhaust pressure value matching the preset ambient temperature is obtained.

10. A refrigerator, characterized in that: The invention comprises a controller, wherein the controller comprises a memory and a processor, wherein a control program is stored in the memory, and when the control program is executed by the processor, it is used to implement the control method of the refrigerator as described in any one of claims 1 to 9.

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