CN106766535A - A kind of control method of refrigerator - Google Patents

Abstract

The present invention provides a kind of control method of refrigerator, the refrigerator includes the first refrigeration compartment with refrigeration pattern and frozen mode, the refrigeration system to first refrigeration compartment offer cold, the blower fan of the cold quantity transmission that the refrigeration system is produced to the first refrigeration compartment, air channel and controller, the refrigeration system includes the compressor, condenser, electric expansion valve and the evaporator that are sequentially connected, and the control method includes：After first refrigeration compartment needs the setting pattern freezed and judge first refrigeration compartment, it is the startup aperture corresponding with the setting pattern that the controller controls the aperture of the electric expansion valve；Judge whether the temperature of the first refrigeration compartment reaches the temperature of shutoff temperature preset temperature numerical value high more corresponding than the setting pattern, if, controller controls the aperture of the electric expansion valve to switch to the switching aperture corresponding with setting pattern, so as to reach the effect of the temperature fluctuation and energy-conservation that reduce the first refrigeration chamber.

Description

A method for controlling a refrigerator

technical field

The invention relates to the field of refrigeration devices, in particular to a control method for a refrigerator with energy-saving effects.

Background technique

In traditional refrigerators, the flow of refrigerant is generally controlled through capillary tubes. However, the throttling effect of the capillary is relatively simple, and the flow rate of the refrigerant cannot be changed according to the cooling capacity required by the cooling room, which directly affects the cooling effect of the refrigerator.

In some existing refrigerators, electronic expansion valves with variable flow rates are used instead of capillary tubes to connect to the refrigeration system, so that the flow of refrigerant can be provided according to the cooling capacity required by the refrigeration compartment, and the cooling efficiency of the refrigeration compartment can be enhanced.

However, during the start-up of the refrigerating system to provide cooling capacity to the refrigerating compartment, the electronic expansion valve always maintains an opening degree. For example, when the refrigerating compartment is a freezing compartment, when the temperature in the refrigerating compartment drops At a certain temperature, due to the large opening of the electronic expansion valve, the evaporation temperature of the evaporator is high, resulting in large temperature fluctuations in the refrigeration room, making it difficult to reach the shutdown temperature, resulting in high energy consumption.

In view of this, it is necessary to provide an improved refrigerator control method to solve the above problems.

Contents of the invention

The object of the present invention is to provide a control method of a refrigerator with energy-saving effect.

In order to achieve the purpose of the above invention, the present invention adopts the following technical solution: a control method for a refrigerator, the refrigerator includes a refrigeration compartment, a refrigeration system that provides cooling capacity for the refrigeration compartment, and converts the cooling capacity generated by the refrigeration system The fan, air duct and controller transmitted to the refrigeration compartment, the refrigeration system includes a compressor, a condenser, an electronic expansion valve and an evaporator connected in sequence, and the fan, compressor, and electronic expansion valve are all connected to the control unit Appliances are electrically connected, the refrigerating compartment includes a first refrigerating compartment with a refrigerating mode and a freezing mode; the control method includes the following steps: after the refrigerator is started, the first refrigerating compartment needs to be refrigerated and it is determined that the first refrigerating compartment needs to be refrigerated. After the setting mode of a refrigeration compartment, the compressor starts, the fan starts, and the controller controls the opening of the electronic expansion valve to be the starting opening corresponding to the setting mode;

After the controller controls the opening of the electronic expansion valve to be the starting opening corresponding to the setting mode, it is determined whether the temperature of the first refrigerating compartment reaches a preset value higher than the shutdown temperature corresponding to the setting mode If it is the temperature of the temperature value, if so, the controller controls the opening of the electronic expansion valve to switch to the switching opening corresponding to the set mode; if not, the controller controls the electronic expansion valve to keep the same The startup opening corresponding to the setting mode operates until the temperature of the first refrigeration compartment reaches a temperature higher than the shutdown temperature of the setting mode by a preset temperature value, and the corresponding startup opening when the setting mode is the refrigeration mode The opening degree is smaller than the start opening degree corresponding to when the setting mode is freezing mode; the switching opening degree corresponding to when the setting mode is refrigeration mode is larger than the corresponding switching opening degree when the setting mode is freezing mode.

As a further improved technical solution of the present invention, after the above-mentioned controller controls the opening of the electronic expansion valve to switch to the switching opening corresponding to the set mode, the control method further includes the following steps: Whether the temperature reaches the shutdown temperature corresponding to the set mode, if yes, the compressor stops, the fan stops, and the electronic expansion valve is closed; if not, the compressor continues to run, the fan continues to run, and the controller controls all The opening of the electronic expansion valve maintains the switching opening corresponding to the set mode until the temperature of the first refrigeration compartment reaches the shutdown temperature corresponding to the set mode.

As a further improved technical solution of the present invention, when the setting mode is the refrigerating mode, the corresponding starting opening is smaller than the corresponding switching opening when the setting mode is the refrigerating mode; when the setting mode is the freezing mode, the corresponding The starting opening is greater than the corresponding switching opening when the setting mode is the freezing mode.

As a further improved technical solution of the present invention, the refrigerating compartment also includes a freezing room, and the air duct includes a refrigerating air duct for transporting the cold generated by the evaporator to the freezing room and transferring the cold generated by the evaporator to the freezing room. The amount is sent to the sub-air channel of the first refrigerating compartment. The refrigerator also includes a damper for opening and closing the sub-air channel and a fan shield for opening and closing the refrigerating air channel. The control The method also includes the following steps: when the first refrigerating compartment needs cooling, start the compressor, start the fan, open the damper, and close the fan shield; when the freezing room needs cooling, start the compressor and start the fan , the fan shield is opened, and the damper is closed.

As a further improved technical solution of the present invention, when the freezer room needs to be refrigerated, the compressor is started, the fan is started, the fan shield is opened, and the damper is closed, the control method further includes the following steps: the controller controls the The opening of the electronic expansion valve is the freezing start opening, and it is determined whether the temperature of the freezing chamber reaches a preset temperature value higher than the freezing shutdown temperature, if so, the controller controls the switching of the opening of the electronic expansion valve Switch the opening for freezing; if not, the controller controls the electronic expansion valve to keep the opening opening for freezing until the temperature of the freezing chamber reaches a temperature that is higher than the freezing shutdown temperature by a preset temperature value; the freezing The starting opening is greater than the freezing switching opening.

As a further improved technical solution of the present invention, after the above-mentioned controller controls the opening of the electronic expansion valve to be switched to freezing switching, the control method further includes the following steps: determining whether the temperature of the freezing chamber reaches the freezing shutdown temperature, and if so , the compressor and the fan are stopped, the electronic expansion valve is closed, and the fan shield is closed; Opening operation until the temperature of the freezer compartment reaches the freezer shutdown temperature.

As a further improved technical solution of the present invention, the volume of the freezing compartment is smaller than that of the first refrigerating compartment; The starting opening is smaller than the corresponding starting opening when the setting mode of the first refrigerating compartment is freezing mode; the freezing switching opening is greater than the corresponding starting opening when the setting mode of the first refrigerating compartment is freezing mode At the same time, it is smaller than the corresponding switching opening when the setting mode of the first refrigerating compartment is the refrigerating mode.

As a further improved technical solution of the present invention, after the refrigerator is started, the control method further includes the following steps: determining whether the first refrigerating compartment needs to be refrigerated, and if so, then determining the setting mode of the first refrigerating compartment; if not, It is then determined whether the freezing chamber needs to be refrigerated, and if so, the compressor is started, the fan is started, the fan shield is opened, and the damper is closed, and the controller controls the opening of the electronic expansion valve to be the freezing start opening, If not, the compressor remains in the off state, the fan remains in the off state, and the electronic expansion valve remains in the closed state, and it is re-determined whether the first refrigeration compartment needs refrigeration.

As a further improved technical solution of the present invention, the compressor is an inverter compressor.

The beneficial effects of the present invention are: in the process of the compressor starting to provide cooling capacity to the refrigerating compartment, when the temperature of the refrigerating compartment reaches a preset temperature value higher than the shutdown temperature corresponding to the set mode temperature, control the opening of the electronic expansion valve from the starting opening corresponding to the setting mode to the switching opening corresponding to the mode, so as to reduce the temperature fluctuation in the refrigeration room and achieve the effect of energy saving .

Description of drawings

FIG. 1 is a flow chart of the control method in the present invention.

detailed description

The present invention will be described in detail below in conjunction with various embodiments shown in the accompanying drawings. Please refer to FIG. 1 , which is a preferred embodiment of the present invention.

Please refer to FIG. 1 , the present invention provides a control method for a refrigerator so that the refrigeration system can quickly and stably reach the shutdown temperature when the refrigeration system starts to provide cooling capacity to the refrigeration compartment, so as to achieve the effect of energy saving.

The refrigerator includes a refrigerating compartment, a refrigerating system that provides cooling capacity for the refrigerating compartment, a fan that transmits the refrigerating capacity generated by the refrigerating system to the refrigerating compartment, an air duct, and a controller, and the refrigerating system includes sequentially The connected compressor, condenser, electronic expansion valve and evaporator, the fan, compressor and electronic expansion valve are all electrically connected to the controller. The compressor is a variable frequency compressor to cooperate with the electronic expansion valve.

The refrigerating compartment includes a first refrigerating compartment with a refrigerating mode and a freezing mode and a freezing compartment, and the air duct includes a refrigerating air duct for transporting the cold generated by the evaporator to the freezing compartment and transporting the cold generated by the evaporator to the freezing compartment. The cooling capacity is delivered to the sub-air duct of the first refrigerating compartment, and the refrigerator also includes a damper for opening and closing the sub-air duct and a fan shield for opening and closing the freezing air duct.

When the damper is in the open state, the cold generated by the evaporator can be transported to the first refrigerated room through the sub-air channel and the fan; when the fan shield is in the open state, the evaporator The cold energy generated by the appliance can be delivered to the freezing chamber through the freezing air duct and the fan.

Described control method comprises the steps:

Refrigerator starts;

Determine whether the first refrigerated compartment needs to be refrigerated, if so, go to step a1; if not, go to step b1;

The above step a1 specifically includes the following steps:

a11: determine the setting mode of the first refrigeration compartment;

The setting mode in the first refrigerating compartment includes a refrigerating mode and a freezing mode, and the setting mode of the first refrigerating compartment can be adjusted according to the actual storage requirement to meet the user's storage requirement.

a12: Start the compressor, start the fan, open the damper, and close the fan shield, the controller controls the opening of the electronic expansion valve to be the starting opening corresponding to the setting mode and jumps to step a13;

In step a12, the damper is opened while the fan shield is closed so that all the cooling generated by the evaporator is transferred to the first refrigeration room through the fan and the sub-air duct, which can speed up the cooling efficiency of the first refrigeration room.

When the set mode is the refrigerating mode, the corresponding startup opening is smaller than when the setting mode is the freezing mode, and when the setting mode is the refrigerating mode, the flow rate of the refrigerant is reduced to prevent the The first refrigerated compartment is overcooled; when the set mode is the freezing mode, the flow rate of the refrigerant is increased so that the first refrigerated compartment can reach the freezing mode faster.

a13: Determine whether the temperature of the first refrigerating compartment has reached a temperature higher than the shutdown temperature corresponding to the setting mode by a preset temperature value, if so, the controller controls the opening of the electronic expansion valve to switch to the setting mode Correspondingly switch the opening degree and jump to step a14; if not, the controller controls the electronic expansion valve to keep operating at the starting opening degree corresponding to the set mode until the temperature of the first refrigerating compartment reaches A temperature higher than the preset temperature value than the shutdown temperature of the setting mode;

The preset temperature value is 2. When the set mode is the refrigerating mode, when the compressor starts to provide cooling capacity to the first refrigerating compartment, when the temperature of the first refrigerating compartment reaches the shutdown temperature corresponding to the refrigerating mode When the temperature is higher than the preset temperature value, the evaporating temperature of the evaporator is low due to the small start-up opening of the electronic expansion valve. low temperature and the food in the first refrigeration room is easy to dry out.

Therefore, when the temperature of the first refrigerating compartment reaches a temperature that is higher than the shutdown temperature corresponding to the refrigerating mode by a preset temperature value, the controller controls the opening of the electronic expansion valve to switch to a switch corresponding to the refrigerating mode. Opening degree, when the setting mode is the refrigeration mode, the corresponding starting opening degree is smaller than the corresponding switching opening degree when the setting mode is the refrigeration mode, that is, increasing the opening degree of the electronic expansion valve, thereby increasing the evaporation The evaporation temperature of the refrigerator, on the one hand, can prevent the first refrigeration compartment from being overcooled, so that the temperature of the first refrigeration compartment can reach the shutdown temperature corresponding to the refrigeration mode as soon as possible, thereby achieving the effect of energy saving; on the other hand , can achieve the effect of moisturizing, and strengthen the fresh-keeping effect of the first refrigeration compartment.

When the set mode is the freezing mode, when the compressor starts to provide cooling capacity to the first refrigerating compartment, when the temperature of the first refrigerating compartment reaches the shutdown temperature corresponding to the freezing mode When the temperature is higher than the preset temperature value, the evaporator’s evaporation temperature is higher due to the large start-up opening of the electronic expansion valve. If the start-up opening of the electronic expansion valve remains unchanged, it will easily lead to temperature fluctuations in the first refrigeration room. Larger, it takes a long time to reach the shutdown temperature corresponding to the freezing mode, resulting in greater energy consumption.

Therefore, when the temperature of the first refrigerating compartment reaches a temperature higher than the shutdown temperature corresponding to freezing by a preset temperature value, the controller controls the opening of the electronic expansion valve to switch to the switch corresponding to the freezing mode. When the setting mode is freezing mode, the corresponding startup opening is greater than the corresponding switching opening when the setting mode is freezing mode, that is, the opening of the electronic expansion valve is reduced, thereby reducing the evaporator The evaporating temperature, on the one hand, reduces the temperature fluctuation in the first refrigerating room, so that the temperature of the first refrigerating room can be lowered to the shutdown temperature corresponding to the freezing mode as soon as possible, so as to achieve the effect of energy saving and enhance the reliability of the refrigerating system On the other hand, it can reduce noise.

The corresponding switching opening degree when the setting mode is the refrigerating mode is larger than the corresponding switching opening degree when the setting mode is the freezing mode.

a14: Determine whether the temperature of the first refrigeration compartment reaches the shut-down temperature corresponding to the set mode, if yes, stop the compressor, fan, and electronic expansion valve; if not, keep the compressor running and the fan In operation, the controller controls the opening of the electronic expansion valve to maintain the switching opening corresponding to the setting mode until the temperature of the first refrigeration compartment reaches the shutdown temperature corresponding to the setting mode.

When the temperature of the first refrigerated compartment reaches the shutdown temperature corresponding to the set mode, go to step b1.

The above step b1 specifically includes the following steps:

b11: Determine whether the freezer needs to be refrigerated. If so, start the compressor, start the fan, open the fan shield, and close the damper. The controller controls the opening of the electronic expansion valve to be the opening of the freezing start and jumps to Go to step b12; if not, keep the compressor and fan in shutdown state, and the electronic expansion valve in closed state;

In step b11, the damper is closed while the fan shield is opened so that all the cooling generated by the evaporator is transferred to the freezing chamber through the fan and the freezing air duct, which can speed up the cooling efficiency of the freezing chamber.

The volume of the freezer compartment is smaller than the volume of the first refrigeration compartment, and the freezing activation opening is larger than the corresponding activation opening when the setting mode of the first refrigeration compartment is refrigeration mode, and smaller than the first refrigeration compartment opening. A corresponding start-up opening when the set mode of the refrigeration compartment is the freezing mode.

If the freezing compartment does not need cooling, it is re-determined whether the first cooling compartment needs cooling.

b12: Determine whether the temperature of the freezing chamber reaches a temperature higher than the preset temperature value of the freezing shutdown temperature, if so, the controller controls the opening of the electronic expansion valve to switch to the freezing switching opening b13; if not, the The controller controls the electronic expansion valve to keep the freezing start opening until the temperature of the freezing chamber reaches a temperature higher than the freezing shutdown temperature by a preset temperature value;

The preset temperature value is 2. During the process of the compressor starting to provide cooling capacity to the freezing chamber, when the temperature of the freezing chamber reaches a temperature higher than the freezing shutdown temperature by a preset temperature value, the opening of the electronic expansion valve is relatively large due to the freezing start. , leading to a high evaporation temperature of the evaporator, if the electronic expansion device keeps the opening of the freezing start unchanged, it will easily lead to large temperature fluctuations in the freezing chamber, and it will take a long time to reach the freezing shutdown temperature, resulting in high energy consumption.

Therefore, when the temperature of the freezing chamber reaches a preset temperature higher than the freezing shutdown temperature, the controller controls the opening of the electronic expansion valve to switch to the freezing switch opening, and the freezing start opening is greater than The opening of the freezing switch is to reduce the opening of the electronic expansion valve, thereby reducing the evaporation temperature of the evaporator. Shutdown temperature, so as to achieve the effect of energy saving, and enhance the reliability of the refrigeration system; on the other hand, can reduce the noise.

The freezing switching opening is larger than the corresponding switching opening when the setting mode of the first refrigerating compartment is freezing mode, and smaller than the corresponding switching opening when the setting mode of the first refrigerating compartment is refrigerating mode .

b13: Determine whether the temperature of the freezing chamber has reached the freezing shutdown temperature, if yes, stop the compressor and fan, close the electronic expansion valve, and close the fan shield; if not, keep the compressor running and the fan running continuously, The controller controls the opening of the electronic expansion valve to keep the freezing switching opening until the temperature of the freezing chamber reaches the freezing shutdown temperature.

When the temperature of the freezing compartment reaches the freezing shutdown temperature, it is re-determined whether the first refrigeration compartment needs to be refrigerated.

Of course, after the refrigerator is started, it is also possible to first determine whether the freezing compartment needs cooling, and then determine whether the first refrigeration compartment needs cooling when the freezing compartment does not need cooling.

In summary, in the present invention, when the compressor starts to provide cooling capacity to the refrigerating compartment, when the temperature of the refrigerating compartment reaches a temperature that is higher than the shutdown temperature corresponding to the set mode by a preset temperature value Controlling the opening of the electronic expansion valve to switch from the starting opening corresponding to the set mode to the switching opening corresponding to the mode, so as to reduce the temperature fluctuation in the refrigeration room and achieve the effect of energy saving.

It should be understood that although this description is described according to implementation modes, not each implementation mode only contains an independent technical solution, and this description in the description is only for clarity, and those skilled in the art should take the description as a whole, and each The technical solutions in the embodiments can also be properly combined to form other embodiments that can be understood by those skilled in the art.

The series of detailed descriptions listed above are only specific descriptions for feasible implementations of the present invention, and they are not intended to limit the protection scope of the present invention. Any equivalent implementation or implementation that does not depart from the technical spirit of the present invention All changes should be included within the protection scope of the present invention.

Claims (9)

1. a kind of control method of refrigerator, the refrigerator includes refrigeration compartment, the refrigeration system of cold is provided to the refrigeration compartment System, the blower fan of the cold quantity transmission that the refrigeration system is produced to refrigeration compartment, air channel and controller, the refrigeration system bag Include compressor, condenser, electric expansion valve and the evaporator being sequentially connected, the blower fan, compressor, electric expansion valve with The controller is electrically connected with, and the refrigeration compartment includes thering is refrigeration pattern and the refrigeration compartment of frozen mode first；It is special Levy and be：The control method comprises the following steps：After refrigerator starts, need to freeze and judge institute in first refrigeration compartment After stating the setting pattern of the first refrigeration compartment, the compressor start, blower fan start, while the controller controls the electronics The aperture of expansion valve is the startup aperture corresponding with the setting pattern；

The controller controls the aperture of the electric expansion valve be the startup aperture corresponding with the setting pattern after, judge Whether the temperature of the first refrigeration compartment reaches the temperature of shutoff temperature preset temperature numerical value high more corresponding than the setting pattern, if It is that then the controller controls the aperture of the electric expansion valve to switch to the switching aperture corresponding with setting pattern；If it is not, Then the controller controls the electric expansion valve to keep startup aperture operation corresponding with the setting pattern until described first The temperature of refrigeration compartment reaches the temperature of preset temperature numerical value higher than the shutoff temperature of the setting pattern, and the pattern that sets is as cold During the pattern of Tibetan it is corresponding startup aperture less than it is described set pattern as refrigeration pattern when corresponding switching aperture；The setting pattern During for frozen mode it is corresponding startup aperture more than it is described set pattern as frozen mode when corresponding switching aperture.

2. control method as claimed in claim 1, it is characterised in that：Controller noted above controls the aperture of the electric expansion valve After switching to the switching aperture corresponding with setting pattern, the control method also comprises the following steps：Between judging the first refrigeration Whether the temperature of room reaches the shutoff temperature corresponding with setting pattern, if so, the then compressor shutdown, fan parking, electricity Sub- expansion valve is closed；If it is not, then compressor continuous service, blower fan continuous service, the controller controls the electric expansion valve Aperture keep the switching aperture corresponding with setting pattern to run up to the temperature of first refrigeration compartment reaches and setting The corresponding shutoff temperature of pattern.

3. control method as claimed in claim 1, it is characterised in that：Corresponding startup when setting pattern as refrigeration pattern Aperture is less than corresponding startup aperture when setting pattern as frozen mode；It is described corresponding when setting pattern as refrigeration pattern Switching aperture more than it is described set pattern as frozen mode when corresponding switching aperture.

4. control method as claimed in claim 1, it is characterised in that：The refrigeration compartment also includes refrigerating chamber, the air channel Including by the cold that the evaporator is produced be delivered to refrigerating chamber freezing air channel and by the evaporator produce cold it is defeated Deliver to the sub-air channel of the first refrigeration compartment, the refrigerator also include in the sub-air channel for be opened and closed the air door of sub-air channel with And for being opened and closed the blower fan mask in freezing air channel, the control method also comprises the following steps：When the first refrigeration compartment needs During refrigeration, the compressor start, blower fan start, air door is opened, blower fan mask is closed；When the refrigerating chamber needs refrigeration When, the compressor start, blower fan start, blower fan mask is opened, air door is closed.

5. control method as claimed in claim 4, it is characterised in that：When the refrigerating chamber needs refrigeration, the compressor is opened When dynamic, blower fan starts, blower fan mask is opened, air door is closed, the control method also comprises the following steps：The controller control The aperture of the electric expansion valve is made for freezing starts aperture, and judges whether the temperature of refrigerating chamber is reached than freezing shutoff temperature The temperature of preset temperature numerical value high, if so, then the controller controls the aperture of the electric expansion valve to switch to freezing to switch Aperture；If it is not, then the controller control electric expansion valve keeps freezing to start aperture operation up to the refrigerating chamber Temperature reaches the temperature of preset temperature numerical value higher than the freezing shutoff temperature；The freezing starts aperture more than the freezing switching Aperture.

6. control method as claimed in claim 5, it is characterised in that：Controller noted above controls the aperture of the electric expansion valve After switching to freezing switching aperture, the control method also comprises the following steps：Judge whether the temperature of refrigerating chamber reaches freezing Shutoff temperature, if so, the then compressor shutdown, fan parking, the electric expansion valve is closed, blower fan mask is closed；If No, then compressor continuous service, blower fan continuous service, controller control the aperture of the electric expansion valve to keep freezing switching to open Degree operation is until the temperature of the refrigerating chamber reaches freezing shutoff temperature.

7. control method as claimed in claim 5, it is characterised in that：The volume of the refrigerating chamber is less than between the described first refrigeration The volume of room；The freezing starts when setting pattern as refrigeration pattern corresponding startup of the aperture more than first refrigeration compartment Aperture, while less than first refrigeration compartment corresponding startup aperture when setting pattern as frozen mode；The freezing is cut When setting pattern as frozen mode corresponding switching aperture of the aperture more than first refrigeration compartment is changed, while being less than described the Corresponding switching aperture when setting pattern as refrigeration pattern of one refrigeration compartment.

8. control method as claimed in claim 1, it is characterised in that：After refrigerator starts, the control method also includes as follows Step：Judge whether the first refrigeration compartment needs refrigeration, if so, then judging the setting pattern of the first refrigeration compartment again；If it is not, then Judge whether the refrigerating chamber needs refrigeration, if so, then the compressor start, blower fan start, blower fan mask is opened, air door Close, while the controller controls the aperture of the electric expansion valve for freezing starts aperture, if it is not, then the compressor is protected Hold stopped status, blower fan and remain shut off state, electric expansion valve and remain off, and judge first refrigeration compartment again Whether refrigeration is needed.

9. control method as claimed in claim 1, it is characterised in that：The compressor is frequency-changeable compressor.