WO2023279988A1

WO2023279988A1 - Refrigeration and freezing device and control method therefor

Info

Publication number: WO2023279988A1
Application number: PCT/CN2022/101180
Authority: WO
Inventors: 刘山山; 宋向鹏; 陈建全; 陈静
Original assignee: 青岛海尔电冰箱有限公司; 海尔智家股份有限公司
Priority date: 2021-07-08
Filing date: 2022-06-24
Publication date: 2023-01-12
Also published as: CN115597281A

Abstract

A refrigeration and freezing device and a control method therefor. The refrigeration and freezing device comprises a storage compartment and a refrigeration chamber, wherein the refrigeration chamber is internally provided with an evaporator for supplying cold to the storage compartment and a cold storage device for accumulating a cooling capacity released by the evaporator; and the refrigeration chamber is controllably closed when the evaporator is stopped supplying the cold. Moreover, the control method comprises: determining that the refrigeration chamber is closed; measuring the temperature of the storage compartment; determining whether the temperature of the storage compartment exceeds a preset temperature threshold; and if yes, opening the refrigeration chamber to supply the cold to the storage compartment by using the cooling capacity accumulated by the cold storage device. Since the refrigeration and freezing device can supply the cold to the storage compartment by using the cooling capacity accumulated by the cold storage device, the temperature of the storage compartment can be reduced without starting the evaporator.

Description

Refrigerating and freezing device and control method thereof

technical field

The invention relates to refrigeration, in particular to a refrigerating and freezing device and a control method thereof.

Background technique

Refrigerating and freezing devices, such as refrigerators, freezers, freezers, etc., use evaporators to provide cold energy to storage compartments. The refrigerant evaporates and absorbs heat in the evaporator, which lowers the surface temperature of the evaporator, thereby providing cooling energy to the surrounding air.

Generally, when the temperature of the storage compartment drops below the set temperature, the evaporator stops cooling. The inventors have realized that the temperature of the storage compartment will gradually rise as time goes by, therefore, it is necessary to start the evaporator to restore the temperature of the storage compartment to below the set temperature.

Contents of the invention

An object of the present invention is to overcome at least one technical defect in the prior art, and provide a refrigerating and freezing device and a control method thereof.

A further object of the present invention is to reduce the temperature of the storage compartment without activating the evaporator.

Another further object of the present invention is to increase the energy efficiency of refrigerator-freezers.

A further object of the present invention is to ensure the refrigeration effect of the refrigeration and freezing device.

According to one aspect of the present invention, a method for controlling a refrigerating and freezing device is provided. The refrigerating and freezing device has a storage compartment and a refrigeration chamber, wherein an evaporator for supplying cooling to the storage compartment and an evaporator for storing A cold storage device for the cold released by the evaporator; the refrigerating chamber is closed in a controlled manner when the evaporator stops cooling; and the control method includes: determining that the refrigerating chamber is closed; detecting the temperature of the storage compartment; judging whether the temperature of the storage compartment is If the preset temperature threshold is exceeded; if so, the refrigeration compartment is opened, so as to use the cold stored in the cold storage device to provide cooling to the storage compartment.

Optionally, before opening the refrigerating chamber, it also includes: obtaining the cold storage capacity of the cold storage device, which is used to indicate the cold storage capacity of the cold storage device when the evaporator is cooling; adjusting the work of the evaporator according to the cold storage capacity of the cold storage device State, the working state includes the state of cooling and the state of stopping cooling.

Optionally, the step of adjusting the cooling state of the evaporator according to the cold storage capacity of the cold storage device includes: determining that the evaporator is in a state of stopping cooling; The cold capacity required by the compartment; judge whether the cold storage capacity of the cold storage device is greater than or equal to the target demand cold capacity; if not, start the evaporator to adjust it from the stop cooling state to the cooling state.

Optionally, the step of acquiring the target required cooling capacity of the storage compartment includes: acquiring a set temperature of the storage compartment; and determining the target required cooling capacity according to the set temperature of the storage compartment.

Optionally, the step of obtaining the cold storage capacity of the cold storage device includes: obtaining a historical cooling supply record of the evaporator; and calculating the cold storage capacity of the cold storage device according to the historical cooling supply record of the evaporator.

Optionally, in the step of obtaining the cold storage capacity of the cold storage device, the cooling supply parameters of the evaporator during the last cooling supply of the evaporator are recorded in the historical cooling supply record of the evaporator, and the cooling supply parameters include the coil temperature of the evaporator and the cooling supply temperature of the evaporator. duration.

Optionally, the step of calculating the cold storage capacity of the cold storage device according to the historical cold supply records of the evaporator includes: determining the cold storage rate of the cold storage device according to the coil temperature; Cooling capacity.

Optionally, the refrigerating and freezing device also has a blower fan, which is arranged in the refrigerating chamber or downstream of the refrigerating chamber, and is used to promote the formation of a blowing air flow from the refrigerating chamber to the storage compartment; and when the refrigerating chamber is opened, The control method also includes: starting the air supply fan.

According to another aspect of the present invention, there is also provided a refrigerating and freezing device, comprising: a box body with a storage compartment and a refrigeration compartment formed inside; an evaporator disposed in the refrigeration compartment for supplying cold storage device, arranged in the refrigeration chamber, for accumulating the cold energy released by the evaporator; and the refrigeration chamber is closed in a controlled manner when the evaporator stops cooling; and a processor and a memory, in which a machine-executable program is stored , when the machine executable program is executed by the processor, it is used to realize the control method according to any one of the above.

Optionally, the refrigerating chamber includes: a bottom wall; a plurality of side walls extending upwards from the edge of the bottom wall, thereby together with the bottom wall to form a refrigerating chamber with an opening at the top; the cold storage device forms at least one side wall of the refrigerating chamber; Moreover, the refrigerating and freezing device also includes a controllable air door, which is controlled and can be opened and closed at the top opening, so as to open or close the refrigerating chamber.

In the refrigerating and freezing device and its control method of the present invention, since the refrigerating chamber is equipped with a cold storage device, it can store cold energy when the evaporator provides cooling, and by monitoring the temperature of the storage compartment, the temperature of the storage compartment exceeds When the preset temperature threshold is turned on, the refrigerating chamber is opened, and the refrigerating and freezing device can use the cold energy stored in the cold storage device to supply cooling to the storage compartment, thereby reducing the temperature of the storage compartment without starting the evaporator.

Further, the refrigerating and freezing device and its control method of the present invention, since the surface temperature is still low when the evaporator stops cooling, can release more cold energy to the surrounding environment, and use the cold storage device to store the cold energy released by the evaporator , and use the cold storage device to supply cooling to the storage compartment when there is a cooling demand in the storage compartment, which is conducive to improving the energy efficiency of the refrigeration and freezing device.

Furthermore, in the refrigeration and freezing device and its control method of the present invention, before opening the refrigeration chamber, by obtaining the cold storage capacity of the cold storage device, and adjusting the working state of the evaporator according to the cold storage capacity of the cold storage device, the cold storage capacity of the cold storage device can be adjusted. When the target cooling capacity of the storage compartment cannot be met, the evaporator is used to supply cooling to the storage compartment, which is beneficial to ensure the cooling effect of the refrigerating and freezing device.

Those skilled in the art will be more aware of the above and other objects, advantages and features of the present invention according to the following detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings.

Description of drawings

Hereinafter, some specific embodiments of the present invention will be described in detail by way of illustration and not limitation with reference to the accompanying drawings. The same reference numerals in the drawings designate the same or similar parts or parts. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the attached picture:

Fig. 1 is a schematic block diagram of a refrigerator-freezer according to one embodiment of the present invention;

Fig. 2 is a schematic structural diagram of a refrigerating and freezing device according to an embodiment of the present invention;

Fig. 3 is a schematic diagram of a control method of a refrigerating and freezing device according to an embodiment of the present invention;

Fig. 4 is the control flow chart of the refrigerator freezer according to one embodiment of the present invention;

Fig. 5 is a schematic structural diagram of a refrigerating and freezing device according to another embodiment of the present invention.

detailed description

Fig. 1 is a schematic block diagram of a refrigerating and freezing device 1 according to an embodiment of the present invention. The refrigerating and freezing device 1 may generally include a cabinet 20 , an evaporator 35 , a cold storage device 57 , a processor 70 and a storage 80 .

Wherein, a storage compartment 21 and a refrigeration compartment 25 are formed inside the box body 20 . The interior of the storage compartment 21 forms a storage space for storing items such as food, medicine, and drinks. The interior of the refrigeration chamber 25 forms a refrigeration space for storing cold sources, such as the evaporator 35 and the cold storage device 57 described below. The refrigerating chamber 25 can communicate with the inner space of the storage compartment 21 through the air supply port 61 and the air return port 62 .

The evaporator 35 is disposed in the refrigeration compartment 25 for supplying cooling to the storage compartment 21 . The evaporator 35 is part of the refrigeration system. The refrigerating system of the refrigerating and freezing device 1 may be a compression refrigerating system, and may further include a compressor 56, a condenser, a throttling device, and the like. The refrigerant evaporates and absorbs heat when flowing through the evaporator 35 , thereby realizing the cooling function of the evaporator 35 . A compressor 56 may be located within the compressor compartment 24.

The cold storage device 57 is disposed in the refrigeration chamber 25 and is used for accumulating the cooling energy released by the evaporator 35 , for example, it can store the cooling energy when the evaporator 35 provides cooling and immediately stops supplying cooling. When the evaporator 35 just stops cooling, its surface temperature is still relatively low, which can release cold energy to the surrounding air. In some embodiments, the cold storage device 57 can be a PCM (phase change material, phase change material) insulation board, and the surface of the PCM insulation board facing the inner space of the refrigeration chamber 25 can be wrapped with an aluminum material. The evaporator 35 may be provided with PCM thermal insulation fins, which may also be used to accumulate the cold released by the evaporator 35, which is beneficial to increase the cold storage area of the cold storage material, thereby improving the overall cold storage capacity.

The refrigerating chamber 25 may be substantially in the shape of a cuboid with an open top, and may include a bottom wall 251 and a plurality of side walls 252 . The bottom wall 251 may extend substantially along a horizontal plane. A plurality of side walls 252 respectively extend upwards from edges of the bottom wall 251 , thereby together with the bottom wall 251 enclose a refrigeration chamber 25 with an opening at the top. The number of sidewalls 252 may be four, which are formed by extending upwards from the periphery of the bottom wall 251 . The cold storage device 57 can form at least one side wall 252 of the refrigerating chamber 25, which is beneficial to reducing the volume of the refrigerating chamber 25 and improving space utilization.

The refrigerating and freezing device 1 may further include a controllable damper 54 , which is controllably and openably and closably provided at the top opening, so as to open or close the refrigerating chamber 25 .

The refrigeration chamber 25 is closed in a controlled manner when the evaporator 35 stops supplying cooling. For example, when the evaporator 35 stops cooling, the controllable damper 54 closes the top opening, thereby preventing the leakage of the cold released by the evaporator 35 when the cooling has just stopped, so that the cold storage device 57 continues to store cold, and at the same time prevents cold storage. The cold energy accumulated by the device 57 is lost when the evaporator 35 is cooling.

As another example, when it is necessary to utilize any one of the cold storage device 57 and the evaporator 35 to provide cooling, the controllable damper 54 can open the top opening, so that the cold provided by the cold storage device 57 and the evaporator 35 can flow out of the refrigeration chamber 25 and Enter the storage compartment 21.

The processor 70 and the memory 80 may form a control device of the refrigerating and freezing device 1 and are arranged in the box body 20 . The control device may be a main control board. The memory 80 stores a machine-executable program 801, and when the machine-executable program 801 is executed by the processor 70, it is used to implement the control method of the refrigerating and freezing device 1 in any of the following embodiments. The processor 70 may be a central processing unit (CPU), or a digital processing unit (DSP) or the like. The memory 80 is used to store programs executed by the processor 70 . Memory 80 may be, but is not limited to, any medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. The memory 80 may also be a combination of various memories. Since the machine-executable program 801 is executed by the processor 70 to implement various processes of the following method embodiments and can achieve the same technical effect, in order to avoid repetition, details are not repeated here.

Fig. 3 is a schematic diagram of a control method of the refrigerating and freezing device 1 according to an embodiment of the present invention. The control method may generally include:

In step S302, it is determined that the refrigeration chamber 25 is closed. For example, by detecting the state or position of the controllable damper 54, it can be indirectly determined whether the refrigeration compartment 25 is closed. When the controllable damper 54 closes the top opening of the refrigeration chamber 25, the refrigeration chamber 25 is closed.

Step S304 , detecting the temperature of the storage compartment 21 . For example, a temperature sensor may be provided in the storage compartment 21 for detecting the temperature of the storage compartment 21 .

Step S306, determining whether the temperature of the storage compartment 21 exceeds a preset temperature threshold.

In step S308 , if the temperature of the storage compartment 21 exceeds the preset temperature threshold, the refrigeration compartment 25 is opened to supply cooling to the storage compartment 21 by using the cold energy stored in the cold storage device 57 . For example, the controllable damper 54 can be controlled to open the top opening of the refrigeration chamber 25 , thereby opening the refrigeration chamber 25 .

Using the above method, the refrigerating and freezing device 1 of this embodiment, since the cold storage device 57 is arranged in the refrigerating chamber 25, can store cold energy when the evaporator 35 is cooling, by monitoring the temperature of the storage compartment 21, and When the temperature of the storage compartment 21 exceeds the preset temperature threshold, the refrigeration compartment 25 is opened, and the refrigerating and freezing device 1 can use the cold energy stored in the cold storage device 57 to supply cooling to the storage compartment 21, so that the evaporator 35 can be turned on without starting. The temperature of the storage compartment 21 is lowered in the case of .

Since the surface temperature of the evaporator 35 is still low when the cooling is stopped, more cold energy can be released to the surrounding environment, and the cold storage device 57 is used to store the cold energy released by the evaporator 35, and there is a cooling demand in the storage compartment 21 When using the cold storage device 57 to supply cold to the storage compartment 21, this is conducive to improving the energy efficiency of the refrigerating and freezing device 1.

Before the above step S302, for example, when a door opening and closing event occurs in the storage compartment 21 and the door body of the storage compartment 21 is closed, the evaporator 35 can be started and supply cooling to the storage compartment 21 for storage. After the temperature of the object compartment 21 reaches the set temperature, the evaporator 35 can be shut down and switched to the state of stopping cooling. While the evaporator 35 is shut down, the refrigeration chamber 25 can be closed, and the blower fan 53 in the following embodiments can be shut down.

In the above step S306, the temperature threshold can be set according to the set temperature of the storage compartment 21 and the freshness preservation requirement of the user. The freshness preservation requirement of the user is the upper limit value of the temperature fluctuation range of the storage compartment 21 allowed by the user. The temperature threshold may be the sum of the set temperature and the upper limit of the temperature variation range. For example, if the set temperature of the storage compartment 21 is 2°C and the upper limit of the temperature fluctuation range of the storage compartment 21 is 3°C, then the temperature threshold may be 5°C.

In some optional embodiments, if the temperature of the storage compartment 21 exceeds the preset temperature threshold, before opening the refrigeration compartment 25, the control method may further include: obtaining the cold storage capacity of the cold storage device 57, and the cold storage capacity is used for Indicate the cooling capacity stored by the cold storage device 57 when the evaporator 35 is cooling, and adjust the working state of the evaporator 35 according to the cold storage capacity of the cold storage device 57. The working state includes a cooling state and a cooling stop state.

For example, when the cold storage capacity is small, the cold storage capacity may not be able to meet the cooling demand of the storage compartment 21 , at this time, the evaporator 35 can be activated, and the evaporator 35 can be used to quickly supplement the cooling capacity to the storage compartment 21 . When the cold storage capacity is large, the cold storage capacity may already meet the cooling demand of the storage compartment 21 , and at this time the evaporator 35 may not be activated. In some embodiments, the cold storage capacity of the cold storage device 57 may be compared with a preset cold capacity threshold, so as to determine the amount of cold storage. For example, when the cold storage capacity of the cold storage device 57 is greater than the cold capacity threshold, it indicates that the cold storage capacity has met the cooling demand of the storage compartment 21; The cooling demand of the storage compartment 21 cannot be met. The cold capacity threshold can be determined according to the average single input cold capacity when the evaporator 35 is used to supply cold to the storage compartment 21 .

In some embodiments, the step of adjusting the cooling state of the evaporator 35 according to the cold storage capacity of the cold storage device 57 may include: determining that the evaporator 35 is in a state of stopping cooling, obtaining the target demand cooling capacity of the storage room 21, and the target demand The cooling capacity is used to indicate the cooling capacity required by the storage compartment 21, and it is judged whether the cold storage capacity of the cold storage device 57 is greater than or equal to the target required cooling capacity. cold state. If the cold storage capacity of the cold storage device 57 is greater than or equal to the target required cooling capacity, the working state of the evaporator 35 may not be adjusted, for example, the evaporator 35 is kept in a cooling off state. The target required cooling capacity may be the cooling capacity required for the temperature of the storage compartment 21 to return to the set temperature (ie to meet the cooling demand).

Since the target demand cooling capacity of the storage compartment 21 can reflect the current cooling demand of the storage compartment 21, which is a kind of real-time data, this embodiment compares the cold storage capacity of the cold storage device 57 with the target demand cooling capacity of the storage compartment 21 Make a comparison, and determine whether to start the evaporator 35 according to the comparison result, you can more accurately determine whether the cold storage capacity of the cold storage device 57 meets the cooling demand of the storage compartment 21, which is conducive to improving the reliability of the control process. The room 21 can save energy consumption while meeting the cooling demand.

The step of acquiring the target required cooling capacity of the storage compartment 21 may include: acquiring a set temperature of the storage compartment 21 , and determining the target required cooling capacity according to the set temperature of the storage compartment 21 . The set temperature of the storage compartment 21 may be the shutdown point temperature.

In the process of determining the target required cooling capacity according to the set temperature of the storage compartment 21, the difference between the temperature of the storage compartment 21 and the set temperature may be calculated, and the target required cooling capacity may be determined according to the difference. For example, in the process of determining the target required cooling capacity according to the above-mentioned difference, a plurality of preset difference ranges can be obtained first, each difference range corresponds to a target required cooling capacity, and then the difference with the above-mentioned difference belongs to The target required cooling capacity corresponding to the range is used as the target required cooling capacity of the storage compartment 21 . The corresponding relationship between each difference range and the target required cooling capacity can be determined according to the input cooling capacity required for the storage compartment 21 to reach the set temperature under different start-up temperatures.

The step of obtaining the cold storage capacity of the cold storage device 57 may include: obtaining the historical cooling record of the evaporator 35 , and calculating the cold storage capacity of the cold storage device 57 according to the historical cooling record of the evaporator 35 . Wherein, the historical cooling record indirectly reflects the cold storage rate of the cold storage device 57 when the evaporator 35 supplies cold. In this embodiment, the historical cooling records of the evaporator 35 record the cooling parameters of the evaporator 35 during the last cooling supply. For example, the cooling parameters may include the coil temperature and the cooling duration of the evaporator 35 . The coil temperature of the evaporator 35 may refer to the average value of the coil temperature during the cooling process of the evaporator 35, and the cooling duration may refer to the running time of the evaporator 35 from startup to shutdown.

In some embodiments, the step of calculating the cold storage capacity of the cold storage device 57 according to the historical cold supply records of the evaporator 35 may include: determining the cold storage rate of the cold storage device 57 according to the coil temperature, and determining the cold storage rate of the cold storage device 57 according to the cold storage rate of the cold storage device 57 and the evaporator 35 The cold storage time of the cold storage device 57 is calculated. The cold storage rate is used to describe the amount of cold stored in the cold storage device 57 per unit time, that is, the speed at which the cold storage device 57 stores cold.

In the process of determining the cold storage rate of the cold storage device 57 according to the coil temperature of the evaporator 35, a preset rate correspondence table can be obtained, which stipulates the coil temperature of the evaporator 35 and the cold storage rate of the cold storage device 57 The corresponding relationship between them, and determine the cold storage rate of the cold storage device 57 corresponding to the coil temperature according to the rate correspondence table. The rate correspondence table can be determined according to the cold storage capacity of the cold storage device 57 within the set time period at different coil temperatures and the length of the set time period.

Using the above method, by using the historical cooling records of the evaporator 35 to determine the cold storage capacity of the cold storage device 57, and judge whether to start the evaporator 35 according to the cold storage capacity, the method is simple and accurate.

In some optional embodiments, the refrigerating and freezing device 1 also has a blower fan 53, which is arranged in the refrigerating chamber 25 or at the downstream of the refrigerating chamber 25, and is used to promote the formation of air flow from the refrigerating chamber 25 to the storage compartment 21. The blowing air flow, so that the cooling provided by the evaporator 35 or the cooling provided by the cold storage device 57 enters the storage compartment 21 along with the blowing air flow. Downstream of the refrigeration chamber 25 may refer to above the top opening of the refrigeration chamber 25 .

While opening the refrigerating chamber 25, the control method may further include: starting the blower fan 53, so that the cold in the refrigerating chamber 25 enters the storage compartment 21 along with the airflow.

By starting the blower fan 53 while opening the refrigeration compartment 25, the blower fan 53 can be used to accelerate the cooling delivery efficiency, which is conducive to prompting the storage compartment 21 to quickly restore the fresh-keeping atmosphere.

In some optional embodiments, in the above step S308, before opening the refrigerating chamber 25, it may not be determined whether the evaporator 35 needs to be activated, and the cold storage device 57 is directly used to supplement the cooling capacity to the storage compartment 21 . The running time of the blower fan 53 after starting can be any value within the range of 20 to 60 minutes, such as 30 minutes, and the blower fan 53 can run at a low speed, so that the cold storage device 57 can slowly release the cooling capacity and delay the temperature of the storage room 21. rise rate. If the temperature of the storage compartment 21 does not reach the set temperature during the operation of the air blower 53, the evaporator 35 can be further started, and the speed of the air blower 53 can be increased, which can omit the cold storage capacity and the target demand cooling. Quantitative calculation process.

Fig. 4 is a control flowchart of the refrigerating and freezing device 1 according to one embodiment of the present invention. The control process may generally include the following steps:

In step S402, it is determined that the refrigeration chamber 25 is closed.

Step S404 , detecting the temperature of the storage compartment 21 .

Step S406, determine whether the temperature of the storage compartment 21 exceeds the preset temperature threshold, if yes, execute step S408, if not, execute step S402.

Step S408, acquiring historical cooling records of the evaporator 35 . The historical cooling record of the evaporator 35 records the cooling parameters of the evaporator 35 during the last cooling supply, and the cooling parameters include the coil temperature of the evaporator 35 and the cooling duration.

Step S410, determine the cold storage rate of the cold storage device 57 according to the coil temperature.

Step S412 , calculating the cold storage capacity of the cold storage device 57 according to the cold storage rate of the cold storage device 57 and the cooling duration of the evaporator 35 .

In step S414, it is determined that the evaporator 35 is in a state of stopping cooling.

In step S416, the set temperature of the storage compartment 21 is acquired.

Step S418 , determining the target required cooling capacity according to the set temperature of the storage compartment 21 . The target required cooling capacity is used to indicate the required cooling capacity of the storage compartment 21 .

Step S420, judging whether the cold storage capacity of the cold storage device 57 is greater than or equal to the target required cooling capacity, if yes, execute step S422, if not, execute step S424.

Step S422, start the evaporator 35 to adjust it from the cooling off state to the cooling state.

In step S424, the refrigeration compartment 25 is opened to supply cold to the storage compartment 21 by using the cold energy stored in the cold storage device 57.

Step S426, start the blower fan 53 .

Using the above method, the refrigerating and freezing device 1 of the present invention, since the cold storage device 57 is arranged in the refrigerating chamber 25, can store cold energy when the evaporator 35 is cooling, by monitoring the temperature of the storage compartment 21, and in the storage When the temperature of the object compartment 21 exceeds the preset temperature threshold, the refrigeration compartment 25 is opened, and the refrigerating and freezing device 1 can use the cold energy stored in the cold storage device 57 to provide cooling to the storage compartment 21, so that the evaporator 35 can not be started. In this case, the temperature of the storage compartment 21 is lowered.

Fig. 5 is a schematic structural diagram of a refrigerating and freezing device 1 according to another embodiment of the present invention. The refrigerating chamber 25 of the refrigerating and freezing apparatus 1 of this embodiment is disposed on the rear side of the storage compartment 21 . There can be two refrigerating chambers 25, which are arranged in parallel front and back. The refrigeration chamber 25 in the above embodiments may be the first refrigeration chamber 25 . The second refrigeration chamber 25 may have the same structure as the first refrigeration chamber 25 . The evaporator in the above embodiments can be named as the first evaporator 35 , and is disposed in the first refrigeration chamber 25 . In this embodiment, the refrigerating and freezing device 1 may further include a second evaporator 44 disposed in the second refrigerating chamber 25 . The first evaporator 35 can be a variable temperature evaporator for realizing variable temperature cooling, and the second evaporator 44 can be a cryogenic evaporator with a cryogenic function or an ordinary refrigeration evaporator with a general cooling function.

The cold storage device 57 may be disposed on the common side wall 252 of the first refrigeration chamber 25 and the second refrigeration chamber 25 . In some optional embodiments, the cold storage device 57 may include a first cold storage part facing the first refrigeration chamber 25 and used for accumulating the cold released by the first evaporator 35 , and a first cold storage part facing the second refrigeration chamber 25 and using The second cold storage part that stores the cold released by the second evaporator 44 . Each cold storage part can be a PCM (phase change material, phase change material) insulation board respectively.

In this embodiment, the controllable damper 54 is also controlled and openable and closed at the top opening of the second refrigeration chamber 25, so that the second refrigeration chamber 25 can be opened or closed, so that the second evaporator 44 or the second cold storage part The provided cold can be delivered to the storage compartment 21 . Both the first evaporator 35 and the second evaporator 44 can be used to supply cooling to the same storage compartment 21, for example, when the set temperature of the storage compartment 21 is the temperature gear corresponding to the first evaporator 35 , the controllable damper 54 can open the first refrigerating chamber 25 and close the second refrigerating chamber 25. The second refrigeration chamber 25 can be opened and the first refrigeration chamber 25 can be closed. In some optional embodiments, a second storage compartment 23 may also be formed in the box body 20, and the refrigerating and freezing device 1 may be further provided with a third evaporator 37 for supplying the second storage compartment 23 For cooling.

In some embodiments, a frame 58 may be provided at the top openings of the first refrigeration chamber 25 and the second refrigeration chamber 25, and the frame 58 has a first air outlet communicating with the first refrigeration chamber 25, and a first air outlet communicating with the second refrigeration chamber. 25 connected second air outlets. The controllable air door 54 is installed on the frame 58 to open or close the first air outlet and the second air outlet, which can make the structural layout more reasonable and facilitate installation.

So far, those skilled in the art should appreciate that, although a number of exemplary embodiments of the present invention have been shown and described in detail herein, without departing from the spirit and scope of the present invention, the disclosed embodiments of the present invention can still be used. Many other variations or modifications consistent with the principles of the invention are directly identified or derived from the content. Accordingly, the scope of the present invention should be understood and deemed to cover all such other variations or modifications.

Claims

A control method for a refrigerating and freezing device, the refrigerating and freezing device has a storage compartment and a refrigeration compartment, wherein an evaporator for supplying cooling to the storage compartment and storing the evaporator is arranged in the refrigeration compartment. A cold storage device for the cold released by the evaporator; the refrigeration chamber is controlled and closed when the evaporator stops cooling; and the control method includes:

determining that the refrigeration chamber is closed;

detecting the temperature of the storage compartment;

judging whether the temperature of the storage compartment exceeds a preset temperature threshold;

If so, open the refrigerating chamber to supply cold to the storage compartment by using the cold energy stored in the cold storage device.
According to the control method according to claim 1, before opening the refrigeration chamber, further comprising:

Acquiring the cold storage capacity of the cold storage device, where the cold storage capacity is used to indicate the cold storage capacity stored by the cold storage device when the evaporator provides cooling;

The working state of the evaporator is adjusted according to the cold storage capacity of the cold storage device, and the working state includes a cooling supply state and a cooling supply stop state.
The control method according to claim 2, wherein,

The step of adjusting the cooling state of the evaporator according to the cold storage capacity of the cold storage device includes:

determining that the evaporator is in a state of stopping cooling;

Obtaining the target required cooling capacity of the storage compartment, where the target required cooling capacity is used to indicate the required cooling capacity of the storage compartment;

judging whether the cold storage capacity of the cold storage device is greater than or equal to the target required cooling capacity;

If not, start the evaporator to adjust it from the cooling off state to the cooling state.
The control method according to claim 3, wherein,

The steps of obtaining the target required cooling capacity of the storage compartment include:

obtaining the set temperature of the storage compartment;

The target required cooling capacity is determined according to the set temperature of the storage compartment.
The control method according to any one of claims 2-4, wherein,

The step of obtaining the cold storage capacity of the cold storage device includes:

Obtain the historical cooling record of the evaporator;

The cold storage capacity of the cold storage device is calculated according to the historical cooling supply records of the evaporator.
The control method according to claim 5, wherein,

In the step of obtaining the cold storage capacity of the cold storage device, the cooling supply parameters of the evaporator during the last cooling supply of the evaporator are recorded in the historical cooling supply records of the evaporator, and the cooling supply parameters include the cooling parameters of the evaporator Coil temperature and cooling time.
The control method according to claim 6, wherein,

The step of calculating the cold storage capacity of the cold storage device according to the historical cold supply records of the evaporator includes:

determining the cold storage rate of the cold storage device according to the coil temperature;

The cold storage capacity of the cold storage device is calculated according to the cold storage rate of the cold storage device and the cooling duration of the evaporator.
The control method according to any one of claims 1-4, wherein,

The refrigerating and freezing device also has a blower fan, arranged in the refrigerating chamber or downstream of the refrigerating chamber, for promoting the formation of a blowing airflow flowing from the refrigerating chamber to the storage compartment; and While opening the refrigeration chamber, the control method also includes:

Start the air blower.
A refrigerating and freezing device, comprising:

The box body is formed with a storage room and a refrigeration room inside;

an evaporator, arranged in the refrigeration chamber, for supplying cooling to the storage compartment;

a cold storage device, arranged in the refrigeration chamber, for accumulating the cold released by the evaporator; and the refrigeration chamber is closed in a controlled manner when the evaporator stops supplying cooling; and

A processor and a memory, where a machine-executable program is stored in the memory, and when the machine-executable program is executed by the processor, it is used to realize the control method according to any one of claims 1-8.
The refrigerator-freezer according to claim 9, wherein,

The refrigeration chamber includes:

bottom wall;

a plurality of side walls respectively extending upwards from the edge of the bottom wall so as to jointly enclose the refrigeration chamber with a top opening with the bottom wall; the cold storage device forms at least one side wall of the refrigeration chamber; and

The refrigerating and freezing device further includes a controllable air door, which is controlled to open and close at the top opening, so as to open or close the refrigerating chamber.