CN115435545A

CN115435545A - Refrigerator and compressor control method thereof

Info

Publication number: CN115435545A
Application number: CN202211071142.8A
Authority: CN
Inventors: 李方; 李秀军; 张善房
Original assignee: Hisense Refrigerator Co Ltd
Current assignee: Hisense Refrigerator Co Ltd
Priority date: 2022-09-02
Filing date: 2022-09-02
Publication date: 2022-12-06

Abstract

The invention discloses a refrigerator and a compressor control method thereof, which are characterized in that when a compressor starting instruction is responded, a prestored initial starting torque of a compressor is obtained, and the compressor is controlled to be started according to the initial starting torque; acquiring the starting state of the compressor, and increasing starting torque when the compressor fails to start until the compressor is started successfully; when the compressor is started successfully, recording the current starting torque as the initial starting torque of the compressor at the next starting. By adopting the embodiment of the invention, the starting torque of the variable frequency compressor is modified, various noises and electric energy consumption caused by overlarge starting torque are improved, the condition of failed starting of the compressor caused by undersize starting torque under severe working conditions can also be improved, and the starting rate is effectively improved.

Description

Refrigerator and compressor control method thereof

Technical Field

The invention relates to a refrigerator control technology, in particular to a refrigerator and a compressor control method thereof.

Background

The operation load of the refrigerator is determined by the ambient temperature and the quantity of frozen goods in the refrigerator. The internal pressure of the inverter compressor of the refrigerator is related to the current environment of the refrigerator and the operation load of the refrigerator. Under different working conditions, the starting and running processes of the variable-frequency compressor of the refrigerator are different, but the starting torque is fixed and unchanged. When the refrigerator has a small operation load, the internal pressure of the compressor is small, the required starting torque is correspondingly small, and when the refrigerator is started by using a large starting torque, the problems of cylinder collision, overhigh acceleration and the like are easily generated in the open-loop dragging process, so that large noise is generated, and unnecessary electric energy is wasted. When the refrigerator has a large operation load, the internal pressure of the compressor is large, the required starting torque is large, and the starting of the compressor is easy to fail if a small starting torque is adopted for starting.

Disclosure of Invention

The embodiment of the invention aims to provide a refrigerator and a compressor control method thereof, which can change the starting torque of a compressor in a self-adaptive manner, save energy consumption and improve the starting efficiency of the compressor.

To achieve the above object, an embodiment of the present invention provides a refrigerator, including:

a plurality of storage chambers provided at an opening of the refrigerator body for storing articles;

the refrigerating system is arranged in the refrigerator body of the refrigerator and used for providing power for the refrigerating cycle of the refrigerator so as to provide cold air for the storage chamber, and the refrigerating system comprises a compressor, an evaporator and a condenser;

the controller is arranged in a box body of the refrigerator and used for responding to a compressor starting instruction, acquiring a prestored initial starting torque of the compressor and controlling the compressor to start according to the initial starting torque; acquiring the starting state of the compressor, and increasing starting torque when the compressor fails to start until the compressor is started successfully; when the compressor is started successfully, recording the current starting torque as the initial starting torque of the compressor at the next starting.

As an improvement of the above, the controller is further configured to:

acquiring a preset maximum starting torque and a preset minimum starting torque of the compressor;

and forming a torque interval by using the maximum starting torque and the minimum starting torque, and acquiring a plurality of reference starting torques from the torque interval according to an equal distribution mode.

As an improvement of the above, when the compressor fails to start, the controller is specifically configured to:

and searching a target starting torque corresponding to the initial starting torque in the torque interval, and updating the initial starting torque into a reference starting torque larger than the target starting torque until the compressor is started successfully.

As an improvement of the above, after obtaining the pre-stored initial starting torque of the compressor, the controller is further configured to:

judging whether the initial starting torque is within a preset starting operation range or not;

if so, controlling the compressor to start according to the initial starting torque; and if not, controlling the compressor to start according to a preset standard starting torque.

judging whether the initial starting torque meets a preset aging condition or not; the aging condition is that the continuous operation time length of the initial starting torque is within a preset time length range, or the continuous operation times of the initial starting torque are within a preset time range;

In order to achieve the above object, an embodiment of the present invention further provides a refrigerator compressor control method, where the refrigerator includes a plurality of storage chambers and a refrigeration system, the refrigeration system is configured to provide power to a refrigeration cycle of the refrigerator to provide cold air to the storage chambers, and the refrigeration system includes a compressor, an evaporator, and a condenser; the refrigerator compressor control method includes:

responding to a compressor starting instruction, acquiring a pre-stored initial starting torque of the compressor, and controlling the compressor to start according to the initial starting torque;

acquiring the starting state of the compressor, and increasing starting torque when the compressor fails to start until the compressor is started successfully;

when the compressor is started successfully, recording the current starting torque as the initial starting torque of the compressor at the next starting.

As an improvement of the above, the refrigerator compressor control method further comprises:

As an improvement of the above, when the compressor fails to start, the increasing the starting torque includes:

As an improvement of the above, after obtaining the pre-stored initial starting torque of the compressor, the refrigerator compressor control method further comprises:

Compared with the prior art, the refrigerator and the compressor control method thereof disclosed by the embodiment of the invention improve various noises and electric energy consumption caused by overlarge starting torque by modifying the starting torque of the variable frequency compressor, can also improve the condition of failed starting of the compressor caused by undersize starting torque under severe working conditions, and effectively improve the starting rate.

Drawings

Fig. 1 is a schematic structural diagram of a refrigerator according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a refrigeration system in a refrigerator according to an embodiment of the present invention;

FIG. 3 is a schematic view of a blower fan in a refrigerator provided by an embodiment of the present invention;

fig. 4 is a first flowchart of a controller in a refrigerator according to an embodiment of the present invention;

fig. 5 is a second operation flowchart of the controller in the refrigerator according to the embodiment of the present invention;

fig. 6 is a third flowchart of the controller of the refrigerator according to the embodiment of the present invention;

fig. 7 is a fourth operation flowchart of the controller in the refrigerator according to the embodiment of the present invention;

fig. 8 is a fifth flowchart of a controller in a refrigerator according to an embodiment of the present invention;

FIG. 9 is a schematic diagram of information interaction between a refrigerator and a client according to an embodiment of the present invention;

fig. 10 is a flowchart of a method for controlling a compressor of a refrigerator according to an embodiment of the present invention.

100, a refrigerator; 200. a client; 300. a router; 400. a cloud server; 1. a compressor; 2. a condenser; 3. an anti-condensation pipe; 4. drying the filter; 5. a capillary tube; 6. an evaporator; 7. a gas-liquid separator; 8. a fan.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present application.

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

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

Referring to fig. 1, fig. 1 is a perspective view of an embodiment of a refrigerator according to the present application. The refrigerator of the embodiment is approximately in a cuboid shape, and comprises a refrigerator body for limiting a storage space and a plurality of door bodies arranged at an opening of the refrigerator body, wherein each door body comprises a door body shell positioned at the outer side of the refrigerator body, a door body liner positioned at the inner side of the refrigerator body, an upper end cover, a lower end cover and a heat insulation layer positioned among the door body shell, the door body liner, the upper end cover and the lower end cover; typically, the thermal insulation layer is filled with a foam material. The cabinet is provided with a chamber including a component storage chamber for storing components in the refrigerator, such as a compressor, etc., and a storage space for storing food, etc. The storage space may be partitioned into a plurality of storage chambers, and the storage chambers may be configured as a refrigerating chamber, a freezing chamber, and a temperature-variable chamber according to their uses. One or more door bodies are associated with each storage compartment, for example, in fig. 1, the storage compartment in the upper portion is provided with a double door body. The door body can be pivotally arranged at the opening of the box body and can be opened in a drawer mode to achieve drawer type storage.

Referring to fig. 2, fig. 2 is a schematic structural diagram of a refrigeration system in a refrigerator according to an embodiment of the present invention, where the refrigeration system includes a compressor 1, a condenser 2, a condensation preventing pipe 3, a dry filter 4, a capillary tube 5, an evaporator 6, and a gas-liquid separator 7. The working process of the refrigeration system comprises a compression process, a condensation process, a throttling process and an evaporation process.

Wherein, the compression process is as follows: the power line of the refrigerator is plugged, when the contact of the temperature controller is connected, the compressor 1 starts to work, the low-temperature and low-pressure refrigerant is sucked by the compressor 1, and is compressed into high-temperature and high-pressure superheated gas in the cylinder of the compressor 1 and then is discharged into the condenser 2; the condensation process is as follows: the high-temperature and high-pressure refrigerant gas is radiated by the condenser 2, the temperature is continuously reduced, the refrigerant gas is gradually cooled to be saturated vapor with normal temperature and high pressure, the refrigerant gas is further cooled to be saturated liquid, the temperature is not reduced any more, the temperature at the moment is called as the condensation temperature, and the pressure of the refrigerant in the whole condensation process is almost unchanged; the throttling process is as follows: the condensed refrigerant saturated liquid flows into the capillary tube 5 after moisture and impurities are filtered by the drying filter 4, throttling and pressure reduction are carried out through the capillary tube, and the refrigerant is changed into normal-temperature low-pressure wet vapor; the evaporation process is as follows: the normal temperature and low pressure wet steam starts to absorb heat for vaporization in the evaporator 6, which not only reduces the temperature of the evaporator and the surrounding, but also changes the refrigerant into low temperature and low pressure gas, the refrigerant from the evaporator 6 returns to the compressor 1 after passing through the gas-liquid separator 7, and the processes are repeated to transfer the heat in the refrigerator to the air outside the refrigerator, thereby realizing the purpose of refrigeration.

Referring to fig. 3, fig. 3 is a schematic position diagram of a fan 8 in the refrigerator according to the embodiment of the present invention, where the fan 8 makes air continuously enter fins of the evaporator 6 for heat exchange, and sends air that has cooled after heat release of the evaporator 6 to the refrigerating chamber and the freezing chamber through an air duct, so that air in the storage chamber continuously circulates and flows to achieve the purpose of reducing temperature.

The controller is configured to: responding to a compressor starting instruction, acquiring a prestored initial starting torque of the compressor, and controlling the compressor to start according to the initial starting torque; acquiring the starting state of the compressor, and increasing starting torque when the compressor fails to start until the compressor is started successfully; when the compressor is started successfully, recording the current starting torque as the initial starting torque of the compressor at the next starting.

Exemplarily, referring to fig. 4, fig. 4 is a first work flow chart of a controller in a refrigerator according to an embodiment of the present invention, where the controller is configured to execute steps S11 to S17:

s11, judging whether a starting instruction of the compressor is received, if so, entering a step S12, and if not, repeatedly executing the step S11.

S12, when a starting instruction of the compressor is received, the pre-stored initial starting torque of the compressor is obtained, and then the step S13 is carried out.

For example, the initial starting torque is a starting torque corresponding to a last successful start of the compressor at the start.

And S13, controlling the compressor to start according to the initial starting torque, and then entering the step S14.

S14, acquiring the starting state of the compressor, and then entering the step S15.

And S15, judging whether the compressor is started successfully or not, if so, entering a step S16, and if not, entering a step S17.

And S16, when the compressor is started successfully, recording the current starting torque as the initial starting torque of the compressor at the next starting.

And S17, when the compressor fails to start, increasing the starting torque until the compressor is started successfully.

Specifically, the controller is further configured to: acquiring a preset maximum starting torque and a preset minimum starting torque of the compressor; and forming a torque interval by using the maximum starting torque and the minimum starting torque, and acquiring a plurality of reference starting torques from the torque interval according to an equal distribution mode.

Exemplarily, referring to fig. 5, fig. 5 is a second work flow chart of the controller in the refrigerator according to the embodiment of the present invention, and after step S11 is executed, the controller is further configured to execute steps S101 to S103:

s101, acquiring a preset maximum starting torque and a preset minimum starting torque of the compressor, and then entering step S102.

S102, forming a torque interval by the maximum starting torque and the minimum starting torque, and then, entering the step S103.

S103, obtaining a plurality of reference starting moments from the moment intervals according to an equal distribution mode.

For example, the steps S101 to S103 are executed when the refrigerator is powered on for the first time, and the steps S101 to S103 need not be executed each time when the compressor is started. The maximum starting torque and the minimum starting torque are preset before the compressor leaves a factory, and the generated reference starting torques comprise the maximum starting torque and the minimum starting torque.

Specifically, when the compressor fails to start, the controller is specifically configured to: and searching a target starting torque corresponding to the initial starting torque in the torque interval, and updating the initial starting torque to a reference starting torque larger than the target starting torque until the compressor is started successfully.

Exemplarily, referring to fig. 6, fig. 6 is a third flowchart of the controller in the refrigerator according to the embodiment of the present invention, where the refrigerator is further configured to perform steps S171 to S174:

s171, after determining that the start of the compressor has failed, indicates that the start torque at that time is too small to drive the start of the compressor, and at this time, the process proceeds to step S172.

S172, searching for a target starting torque corresponding to the initial starting torque in the torque interval, and then entering step S173. It will be appreciated that the initial starting torque may be one of the reference starting torques, so that the corresponding reference starting torque may be found in the reference starting torque, when the target starting torque = one of the reference starting torques, when the initial starting torque is not one of the reference starting torques, when the target starting torque ≠ one of the reference starting torques.

S173, the initial starting torque is updated to a reference starting torque larger than the target starting torque, and then the process proceeds to step S174.

For example, the reference starting torque is obtained as a torque closest to the target starting torque, and is gradually substituted from small to large until the compressor is started successfully.

And S174, judging whether the compressor is started successfully, if so, ending the process, subsequently entering the step S16, otherwise, returning to the step S173, and continuously updating the starting torque of the compressor until the compressor is started successfully.

Specifically, after obtaining the pre-stored initial starting torque of the compressor, the controller is further configured to: judging whether the initial starting torque is within a preset starting operation range or not; if so, controlling the compressor to start according to the initial starting torque; if not, controlling the compressor to start according to a preset standard starting torque.

Exemplarily, referring to fig. 7, fig. 7 is a fourth operation flowchart of the controller in the refrigerator according to the embodiment of the present invention, in which after step S12 is executed, the controller is further configured to execute steps S121 to S122:

and S121, judging whether the initial starting torque is in a preset starting operation range, if so, entering a step S13, and otherwise, entering a step S122.

And S122, when the initial starting torque is not in the preset starting operation range, acquiring another preset standard starting torque to control the starting of the compressor.

For example, the compressor may be subjected to multiple times of torque adjustment during the last start, and if the start torque at this time is not within the start operation range (where the start operation range includes the minimum start torque), it indicates that the initial start torque is too large, and may be only applicable to the last start of the compressor, and the start is not applicable this time.

It should be noted that the standard starting torque is any value within the starting operation range, such as a fixed value, which may be customized or preset before factory shipment. In addition, considering that the standard starting torque should be not different from the torque of the last start of the compressor by too much, which may cause the start failure of the compressor, the standard starting torque may also be a dynamic value in the start operation range, which is related to the initial starting torque (by a preset difference) not in the start operation range, and when the initial starting torque not in the start operation range is larger, the standard starting torque is larger, and when the initial starting torque not in the start operation range is smaller, the standard starting torque is smaller.

Specifically, after obtaining the pre-stored initial starting torque of the compressor, the controller is further configured to: judging whether the initial starting torque meets a preset aging condition or not; the aging condition is that the continuous operation time length of the initial starting torque is within a preset time length range, or the continuous operation times of the initial starting torque are within a preset time range; if so, controlling the compressor to start according to the initial starting torque; and if not, controlling the compressor to start according to a preset standard starting torque.

Exemplarily, fig. 8 is a fifth work flow chart of the controller in the refrigerator according to the embodiment of the present invention, in which after the controller performs step S12, the controller is further configured to perform steps S131 to S132:

s131, judging whether the initial starting torque meets a preset aging condition, if so, entering a step S13, otherwise, entering a step S132.

And S132, when the initial starting torque does not meet the preset aging condition, acquiring another pre-stored standard starting torque to control the starting of the compressor.

For example, the starting torque is time-efficient, and after the starting torque is operated for a period of time or reaches a certain starting number, the starting torque needs to be reconfigured after initialization so as to adapt to a new operating condition.

Referring to fig. 9, fig. 9 is a schematic diagram of information interaction between the refrigerator 100 and the client 200 according to the embodiment of the present invention; the refrigerator 100 establishes a data connection with the client 200 through the router 300 or the cloud server 400. When the refrigerator 100 and the client 200 communicate with each other through the router 300, the refrigerator 100 and the client 200 are located at a short distance, and a user can view an operation condition or a food storage condition of the refrigerator placed in a kitchen in a living room or a room. When the refrigerator 100 and the client 200 communicate with each other through the cloud server 400, the refrigerator 100 and the client 200 are far away from each other, and a user can perform data interaction with the refrigerator 100 through an APP installed in the client 200, and meanwhile, remote control of the refrigerator 100 can be realized.

Compared with the prior art, the refrigerator disclosed by the embodiment of the invention has the advantages that when the refrigerator responds to a compressor starting instruction, the prestored initial starting torque of the compressor is obtained, and the compressor is controlled to be started according to the initial starting torque; acquiring the starting state of the compressor, and increasing starting torque when the compressor fails to start until the compressor is started successfully; when the compressor is started successfully, recording the current starting torque as the initial starting torque of the compressor at the next starting. By adopting the embodiment of the invention, the starting torque of the variable frequency compressor is modified, various noises and electric energy consumption caused by overlarge starting torque are improved, the condition of failed starting of the compressor caused by undersize starting torque under severe working conditions can be improved, and the starting rate is effectively improved.

Referring to fig. 10, fig. 10 is a flowchart of a method for controlling a refrigerator compressor according to an embodiment of the present invention, where the method for controlling a refrigerator compressor according to an embodiment of the present invention is implemented by a controller in a refrigerator, and the method for controlling a refrigerator compressor includes:

s1, responding to a compressor starting instruction, acquiring a prestored initial starting torque of the compressor, and controlling the compressor to start according to the initial starting torque;

s2, acquiring a starting state of the compressor;

s3, when the compressor fails to start, increasing a starting torque until the compressor is started successfully;

and S4, when the compressor is started successfully, recording the current starting torque as the initial starting torque of the compressor when the compressor is started next time.

Specifically, the refrigerator compressor control method further includes: acquiring a preset maximum starting torque and a preset minimum starting torque of the compressor; and forming a torque interval by using the maximum starting torque and the minimum starting torque, and acquiring a plurality of reference starting torques from the torque interval in an equal distribution mode.

This step is illustratively performed when the refrigerator is first powered up, and is not required every time the compressor is subsequently started. The maximum starting torque and the minimum starting torque are preset before the compressor leaves a factory, and the generated reference starting torques comprise the maximum starting torque and the minimum starting torque.

Specifically, when the compressor fails to start, the increasing of the starting torque includes: and searching a target starting torque corresponding to the initial starting torque in the torque interval, and updating the initial starting torque into a reference starting torque larger than the target starting torque until the compressor is started successfully.

It is understood that the initial starting torque may be one of the reference starting torques, so that the corresponding reference starting torque may be found in the reference starting torque, when the target starting torque = one of the reference starting torques, and when the initial starting torque is not one of the reference starting torques, when the target starting torque ≠ one of the reference starting torques. For example, the reference starting torque is obtained as a torque closest to the target starting torque, and is gradually substituted from small to large until the compressor is started successfully.

Specifically, after obtaining a pre-stored initial starting torque of the compressor, the refrigerator compressor control method further includes: judging whether the initial starting torque is within a preset starting operation range or not; if so, controlling the compressor to start according to the initial starting torque; if not, controlling the compressor to start according to a preset standard starting torque.

It should be noted that the standard starting torque is any value within the starting operation range, such as a fixed value, which may be customized or preset before factory shipment. In addition, considering that the standard starting torque should not differ from the torque of the compressor at the last starting, which may cause the starting failure of the compressor, the standard starting torque may also be a dynamic value in the starting operation range, which is related to the initial starting torque not in the starting operation range (by a preset difference), when the initial starting torque not in the starting operation range is larger, the standard starting torque is larger, and when the initial starting torque not in the starting operation range is smaller, the standard starting torque is smaller.

Specifically, after obtaining a pre-stored initial starting torque of the compressor, the refrigerator compressor control method further includes: judging whether the initial starting torque meets a preset aging condition or not; the aging condition is that the continuous operation time length of the initial starting torque is within a preset time length range, or the continuous operation times of the initial starting torque are within a preset time range; if so, controlling the compressor to start according to the initial starting torque; if not, controlling the compressor to start according to a preset standard starting torque.

Compared with the prior art, the refrigerator compressor control method disclosed by the embodiment of the invention has the advantages that when the method responds to a compressor starting instruction, the prestored initial starting torque of the compressor is obtained, and the compressor is controlled to be started according to the initial starting torque; acquiring the starting state of the compressor, and increasing starting torque when the compressor fails to start until the compressor is started successfully; when the compressor is started successfully, recording the current starting torque as the initial starting torque of the compressor at the next starting. By adopting the embodiment of the invention, the starting torque of the variable frequency compressor is modified, various noises and electric energy consumption caused by overlarge starting torque are improved, the condition of failed starting of the compressor caused by undersize starting torque under severe working conditions can be improved, and the starting rate is effectively improved.

While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.

Claims

1. A refrigerator, characterized by comprising:

2. The refrigerator of claim 1, wherein the controller is further configured to:

and forming a torque interval by using the maximum starting torque and the minimum starting torque, and acquiring a plurality of reference starting torques from the torque interval in an equal distribution mode.

3. The refrigerator of claim 2, wherein when the compressor fails to start, the controller is specifically configured to:

4. The refrigerator as claimed in claim 1, wherein the controller, after acquiring a pre-stored initial starting torque of the compressor, is further configured to:

5. The refrigerator as claimed in claim 1, wherein after acquiring a pre-stored initial starting torque of the compressor, the controller is further configured to:

6. A refrigerator compressor control method, wherein the refrigerator includes a plurality of storage compartments and a refrigeration system for powering a refrigeration cycle of the refrigerator to provide cool air to the storage compartments, the refrigeration system including a compressor, an evaporator and a condenser; the refrigerator compressor control method includes:

7. The refrigerator compressor control method as claimed in claim 1, further comprising:

8. The method for controlling a compressor of a refrigerator according to claim 7, wherein the increasing of the starting torque when the compressor fails to be started comprises:

9. The refrigerator compressor control method as claimed in claim 6, wherein after acquiring a pre-stored initial starting torque of the compressor, the refrigerator compressor control method further comprises:

10. The refrigerator compressor control method as claimed in claim 6, wherein after acquiring a pre-stored initial starting torque of the compressor, the refrigerator compressor control method further comprises: