CN109959201B - Control method of refrigerating and freezing device - Google Patents

Abstract

The invention provides a control method of a refrigerating and freezing device. The refrigerating and freezing device comprises: a box body and a compressor compartment arranged under the rear of the box body; wherein a bottom condenser communicated with the compressor is arranged in the compressor compartment, In order to dissipate heat to the refrigeration system, and at least one side wall of the box body is provided with a side condenser; the control method includes: acquiring the ambient temperature of the environment where the refrigerating and freezing device is located; when the ambient temperature is less than or equal to a preset upper limit threshold , start the side condenser to assist the cooling system to dissipate heat. The control method of the present invention can control the side condenser to be controlled to start when necessary to perform auxiliary heat dissipation, so that the bottom condenser and the side condenser can jointly dissipate heat from the refrigeration system, thereby improving the heat dissipation effect and heat exchange efficiency of the refrigeration system. .

Description

Control method of refrigerating and freezing device

technical field

The invention relates to the technical field of refrigeration equipment, in particular to a control method of a refrigeration and freezing device.

Background technique

Refrigerator freezers generally have a certain volume. When a household refrigerating and freezing device, such as a refrigerator, is placed in a restaurant, a kitchen, etc., it will protrude outward from the wall, which is not conducive to saving space and beautifying the appearance. At present, in order to make the indoor environment beautiful and save space, built-in refrigerators are usually installed in cabinets or walls as part of the kitchen or dining room, which is convenient to use and optimizes the indoor space. However, the airflow in the cabinets or walls is easily blocked and heat dissipation The ventilation of the system is difficult, which reduces the ventilation and heat dissipation effect of the refrigerator, and cannot meet the performance of the built-in refrigerator.

SUMMARY OF THE INVENTION

An object of the present invention is to provide a control method for a refrigerating and freezing device with good ventilation and heat dissipation.

A further object of the present invention is to improve the ventilation and heat dissipation capacity of the refrigerating and freezing device and reduce its energy consumption.

In particular, the present invention provides a control method for a refrigerating and freezing device, wherein the refrigerating and freezing device comprises: a box body and a compressor compartment disposed under the rear of the box body; wherein the compressor compartment is provided with a A bottom condenser communicated with the compressor to dissipate heat to the refrigeration system, and a side condenser is arranged inside at least one side wall of the box; the control method includes:

obtaining the ambient temperature of the environment where the refrigerating and freezing device is located;

When the ambient temperature is less than or equal to the preset upper threshold, the side condenser is activated to assist the cooling system to dissipate heat.

Further, the refrigerating and freezing device has a free heat dissipation mode and an embedded heat dissipation mode;

The control methods include:

When the refrigerating and freezing apparatus operates in the free heat dissipation mode, when the ambient temperature is less than or equal to a preset first upper limit threshold, the side condenser is activated; and

When the refrigerating and freezing apparatus operates in the built-in heat dissipation mode, when the ambient temperature is less than or equal to a preset second upper limit threshold, the side condenser is activated; and

The first upper threshold is smaller than the second upper threshold.

Further, the control method also includes:

Acquiring the distances between the refrigerating and freezing apparatus and the walls and/or cabinets located on both sides and rear sides thereof; and determining the heat dissipation mode of the refrigerating and freezing apparatus according to the acquired results.

Further, the control method also includes:

When the distance between the refrigerating and freezing device and the walls and/or cabinets located on both sides thereof is less than or equal to the first distance, and the distance between the refrigerating and freezing device and the walls and/or cabinets located on the rear side thereof is less than or equal to the first distance When the distance is less than or equal to the second distance, the refrigerating and freezing apparatus is operated in the embedded cooling mode; and

When the distance between the refrigerating and freezing device and the walls and/or cabinets located on both sides thereof is greater than the first distance, or the distance between the refrigerating and freezing device and the walls and/or cabinets located on the rear side thereof is greater than the first distance At the second distance, the refrigerating and freezing device is made to operate in a free heat dissipation mode.

Further, a cooling fan, a compressor and a blower are also arranged in the compressor compartment; and

the cooling fan is configured to cause air to flow from the bottom condenser to the blower via the cooling fan and the compressor in sequence;

The control method also includes:

obtaining the bottom condenser temperature and the ambient temperature; and

When the temperature of the bottom condenser is greater than the ambient temperature and exceeds a preset first difference value, starting the blower to perform forced heat dissipation to the compressor compartment; and

When the temperature of the bottom condenser drops to a difference value smaller than a preset second difference value smaller than the first difference value, the blower is controlled to stop.

Further, the bottom front side of the compressor compartment has a lateral opening to allow air to flow into or out of the compressor compartment; and

The blower is configured such that its air outlet is positioned toward at least a portion of the lateral opening to cause air flowing thereto to accelerate out of the compressor bay from the lateral opening, and to cause air flowing from the compressor bay to continue forward flow.

Further, the control method also includes:

When the refrigerating and freezing device starts to cool, start the compressor;

activating the cooling fan after the compressor has operated for a first activation time; and

The blower is activated after the cooling fan has operated for a second activation time.

Further, the control method also includes:

When the refrigerating and freezing device stops cooling, turning off the compressor;

turning off the blower after the compressor stops running for a first stop time; and

After the blower stops running for the second stop time, the cooling blower is turned off.

Further, the refrigerating and freezing device also includes:

a ventilation duct, which is arranged in the bottom space of the box on the front side of the blower, and whose rear end extends backward to connect with the air supply port of the blower; and

The ventilation duct is configured to have a cross-sectional area that gradually increases from the rear to the front, so that the air flowing out of the compressor compartment gradually diffuses and flows forward.

Further, the refrigerating and freezing device also includes:

The windshield baffle is arranged at the transverse middle position of the bottom of the box, and extends backward from the front of the bottom wall of the box to the rear end of the bottom of the box in the front-rear direction, so as to separate the bottom of the box. The bottom area is divided into left and right parts, and the air in the two parts is prevented from directly exchanging gas; wherein

The blower and the ventilation duct are integrally located on the same side of the windscreen in the lateral direction.

The control method of the present invention can control the side condenser to be controlled to start when necessary to perform auxiliary heat dissipation, so that the bottom condenser and the side condenser can jointly dissipate heat from the refrigeration system, thereby improving the heat dissipation effect and heat exchange efficiency of the refrigeration system. .

Further, the control method of the present invention can also start the blower to carry out active forced heat dissipation when the bottom condenser of the refrigerating and freezing device cannot effectively dissipate heat, thereby effectively prompting the high-temperature air to flow out of the compressor compartment effectively, avoiding the compressor or the condenser due to Failure due to overheating.

Further, when the heat exchange efficiency of the refrigeration system meets the refrigeration effect required by the refrigerating and freezing device, and the temperature in the compressor compartment is relatively low, the blower can be turned off under the control of this control method, and the bottom condenser is only carried out by the cooling fan. Heat dissipation to save energy consumption and reduce noise.

Further, the second difference for judging the off condition of the blower may be slightly lower than the first difference for judging the on condition of the blower to avoid repeated opening and closing of the blower.

The above and other objects, advantages and features of the present invention will be more apparent to those skilled in the art from the following detailed description of the 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 example and not limitation with reference to the accompanying drawings. The same reference numbers in the figures designate the same or similar parts or parts. It will be understood by those skilled in the art that the drawings are not necessarily to scale. In the attached picture:

1 is a schematic front view of a refrigeration and freezing apparatus according to an embodiment of the present invention;

Figure 2 is a schematic rear view of a refrigerating and freezing apparatus according to an embodiment of the present invention;

Figure 3 is a schematic side view of a refrigerating and freezing apparatus according to an embodiment of the present invention;

4 is a schematic schematic diagram of a refrigeration system according to another embodiment of the present invention;

5 is a schematic side view of a refrigeration and freezing apparatus according to another embodiment of the present invention;

6 is a schematic top view of a compressor compartment and a box bottom structure of a refrigerating and freezing apparatus according to still another embodiment of the present invention;

7 is a schematic flowchart of a method for controlling a blower of a refrigerating and freezing apparatus according to an embodiment of the present invention;

8 is a schematic flowchart of a method for controlling a blower of a refrigerating and freezing apparatus according to another embodiment of the present invention;

9 is a schematic flowchart of a method for controlling a blower of a refrigerating and freezing apparatus according to still another embodiment of the present invention;

10 is a schematic flowchart of a control method for judging the installation state of a refrigerating and freezing apparatus according to an embodiment of the present invention;

11 is a schematic flowchart of a control method for judging the installation state of a refrigerating and freezing apparatus according to another embodiment of the present invention;

12 is a schematic flowchart of a control method for a refrigerating and freezing apparatus operating in an embedded heat dissipation mode according to an embodiment of the present invention;

13 is a schematic flowchart of a control method for a refrigerating and freezing apparatus operating in a self-heating mode according to an embodiment of the present invention;

14 is a schematic flowchart of a control method for a refrigerating and freezing apparatus operating in an embedded heat dissipation mode according to another embodiment of the present invention.

Detailed ways

FIG. 1 is a schematic front view of a refrigerating and freezing apparatus 1 according to an embodiment of the present invention. FIG. 2 is a schematic rear view of the refrigerating and freezing apparatus 1 according to an embodiment of the present invention, wherein part of the back panel of the box body is hidden from the bottom to show its internal structure. 3 is a schematic side perspective view of a condenser and an air duct according to an embodiment of the present invention, wherein part of the side panel of the box body is hidden to show its internal structure.

Referring to FIG. 1 to FIG. 3 , the refrigerating and freezing apparatus 1 to which the control method of the present invention is applicable may generally include a box body 10 and a compressor compartment 100 . A storage compartment is defined in the box body 10 . The storage compartment can be set up as many as needed. The storage compartment may have a front facing opening to allow access to or from the storage compartment. The refrigerating and freezing apparatus 1 may further have a plurality of door bodies to rotatably open or close the front opening of the storage compartment from one or both sides of the box body 10 in the lateral direction. The compressor compartment 100 can be disposed under the rear of the box body 10 to install and accommodate refrigeration structures such as the compressor 110 . The refrigerating and freezing apparatus 1 may be a built-in refrigerator, at least a refrigerating compartment and a freezing compartment are defined in the box body 10 , and the refrigerating and freezing apparatus 1 is configured to be suitable for being embedded in a wall and/or a cabinet body, and allows the box body 10 The sides and back are close to the wall and/or cabinet.

Those skilled in the art can understand that for built-in refrigerators, the so-called "close" here means that ventilation may not be reserved between the sides and back of the refrigerator box 10 and the surrounding walls and/or cabinets. Space, the distances between the two sides and the back of the refrigerator box 10 and the surrounding walls and/or cabinets can be as small as possible under the condition that the refrigerator box 10 can be placed in the embedded space. Of course, the refrigerating and freezing apparatus 1 may also be installed in a relatively open space with no shield on the peripheral side. Correspondingly, when the refrigerating and freezing apparatus 1 is in different states (inserted with shielding or free standing without shielding), the refrigerating and freezing apparatus 1 can respectively operate different heat dissipation modes to dissipate heat from its refrigeration system.

FIG. 4 is a schematic schematic diagram of a refrigeration system according to another embodiment of the present invention.

Referring to FIGS. 2 to 4 , the refrigeration and freezing apparatus 1 has a compression refrigeration system, and includes refrigeration devices such as a compressor 101 , a cooling fan 102 , a condenser and an evaporator 500 . Specifically, both the compressor 101 and the cooling fan 102 may be disposed inside the compressor compartment 100 , and the compressor 101 may be configured to be located downstream of the air supply path of the cooling fan 102 . The bottom front side of the compressor bay 100 has a lateral opening 106 to allow air to flow into or out of the compressor bay 100 from the front and bottom of the compressor bay 100 . Specifically, the condensers may include: bottom condenser 103 and side condenser 105 . The bottom condenser 103 may be disposed in the compressor compartment 100 and communicate with the compressor 101 . The bottom condenser 103 may be configured to be located upstream of the air supply path of the cooling fan 102 to dissipate heat for the refrigeration system. The side condensers 105 may be one or more, and may be disposed inside at least one side wall of the case 10, and may be configured for optional controlled operation to provide additional heat dissipation for the refrigeration system when necessary. In some embodiments of the present invention, there may be two side condensers 105, and they are respectively disposed in the left side wall and the right side wall of the box body 10 to improve the heat dissipation effect.

4, in some embodiments of the present invention, the side condenser 105 is configured to be arranged in parallel with the bottom condenser 103 through a control valve, and is operated simultaneously with the bottom condenser 103 through controlled communication of the control valve, so as to jointly Cool the cooling system.

That is, the side condenser 105 can provide an additional auxiliary heat dissipation path for the refrigeration system when necessary, so that the refrigerating and freezing apparatus 1 can realize the simultaneous heat dissipation of the side condenser 105 and the bottom condenser 103, and further improve the replacement of the refrigerating and freezing apparatus 1. The heat exchange efficiency of the thermal system ensures the stable operation of the refrigeration system.

In the refrigerating and freezing device 1 of the present invention, the bottom condenser 103 , the cooling fan 102 and the compressor 101 are sequentially arranged in the compressor compartment 100 along the flow direction of the heat-dissipating air flow, thereby forming a heat-dissipating area at the bottom of the refrigerating and freezing device 1 , so that the cooling system can be used in the refrigeration system. When the freezing device 1 is embedded in a position surrounded by walls or cabinets on the peripheral side, the refrigeration system can dissipate heat through the bottom heat dissipation area, thereby ensuring the stable operation of the refrigeration system.

Further, when necessary, the refrigerating and freezing apparatus 1 can also conduct auxiliary heat dissipation through the side condenser 105, so as to further improve the heat dissipation effect and heat exchange efficiency of the refrigeration system.

5 is a schematic side view of the refrigerating and freezing apparatus 1 according to another embodiment of the present invention, in which part of the side plate of the compressor 101 and the side plate of the casing 10 are hidden to show its internal structure. 6 is a schematic top view of the compressor compartment 100 and the box bottom structure of the refrigerating and freezing apparatus 1 according to still another embodiment of the present invention, wherein a plurality of arrows show the flow direction of the cooling airflow.

Referring to FIGS. 5 and 6 , in some embodiments of the present invention, the refrigerating and freezing apparatus 1 may further include a blower 104 . The blower 104 may be disposed in the compressor compartment 100 and located downstream of the air supply path of the cooling fan 102 and the compressor 101 . That is, cooling fan 102 is configured to draw air into compressor bay 100 through at least a portion of lateral opening 106 and cause it to flow laterally through bottom condenser 103 , cooling fan 102 , and compressor 101 in sequence to blower 104 . The blower 104 then accelerates the air flowing to it that has completed heat exchange with the refrigeration device out of the compressor bay 100 through at least a portion of the lateral opening 106 .

In this embodiment, referring to FIG. 6 , the cooling fan 102 and the blower 104 are respectively arranged on both sides of the compressor 101 , and the bottom condenser 103 and the compressor 101 are respectively arranged on both sides of the cooling fan 102 . Therefore, each refrigeration device is disposed adjacent to at least one fan, and at the end of the flow path of the heat dissipation airflow, there is a special fan to accelerate the outflow of the heat exchange airflow with a higher temperature that has been exchanged with the refrigeration device in the compressor compartment 100 The blower 104 is used to ensure that there is continuous flow of cooling air on the peripheral side of each refrigeration device, and the blower 104 can force the cooling air to flow out of the compressor compartment 100 after the heat exchange is completed to achieve active forced cooling, thereby further enhancing the compressor. The overall heat dissipation efficiency inside the bin 100 can significantly improve the heat dissipation effect and heat exchange effect of the refrigeration system, especially when the refrigerating and freezing apparatus 1 is embedded in a position where the peripheral side is shielded.

In some embodiments of the present invention, the compressor compartment 100 may be configured to extend laterally and located at the lower rear of the refrigerating and freezing apparatus 1 . Accordingly, the box body 10 defining the storage compartment may be recessed inwardly at the lower rear portion thereof to allow the compressor compartment 100 to be disposed in the recessed portion with the front surface of the compressor compartment 100 and the rear surface of the box body 10 being separated. There can be gaps in between to allow airflow.

In other embodiments of the present invention, referring to FIG. 5 , the front surface of the compressor compartment 100 may also be in direct contact with the rear surface of the casing 10 , or be the same surface to make the structure of the refrigerating and freezing apparatus 1 more compact. At this time, a gap may be formed between the front end of the bottom support plate 107 of the compressor compartment 100 and the front surface of the compressor compartment 100 , that is, the rear surface of the casing 10 to allow airflow to pass therethrough. Further, the air outlet guide member of the blower 104 can also directly extend out of the compressor compartment 100 from the lateral opening 106 and extend forward to the bottom of the casing 10 to guide and promote the heat dissipation airflow to accelerate forward and flow out of the compressor compartment 100 .

That is, the lateral opening 106 may be defined by the gap between the bottom support plate 107 of the compressor compartment 100 and the rear wall plate of the casing 10 , and may be configured to extend laterally from the left end of the front end of the bottom support plate 107 of the compressor compartment 100 . all the way to the right end. Therefore, air can enter and exit the compressor compartment 100 from the bottom front side of the compressor compartment 100 at any position along the lateral direction of the compressor compartment 100 .

In some embodiments of the present invention, the bottom condenser 103 may be configured to be disposed close to the lateral opening 106 , and may have an inclined angle to cover a large area of the front side of the air inlet end of the cooling fan 102 .

The cooling fan 102 is configured to urge the air in the compressor compartment 100 to flow from the end where the bottom condenser 103 is located toward the side where the compressor 101 is located in the lateral direction, so that the bottom condenser 103 has a lower airflow pressure and is easier to be sucked into the outside world Air. In addition, since the cooling fan 102 sucks and blows air laterally inside the compressor chamber 100 , a large amount of outside air can be prevented from bypassing the bottom condenser 103 and entering the cooling fan 102 directly from the lateral opening 106 on the bottom front side of the compressor chamber 100 . Further, a small portion of the air entering the compressor compartment 100 through the lateral opening 106 near the cooling fan 102 can also supplement the cooling airflow that has passed through the bottom condenser 103 , enhancing its subsequent cooling effect on the compressor 101 . The heat-exchanged radiating airflow can also flow out of the compressor compartment 100 along any position of the lateral opening 106 , which is equivalent to increasing the area of the air inlet and the air outlet of the compressor compartment 100 , promoting the flow of the radiating airflow, and improving the heat dissipation efficiency.

In some embodiments of the present invention, the blower 104 is configured with its air outlet positioned toward at least a portion of the lateral opening 106 to encourage continued forward flow of air exiting the compressor bay 100 . That is, the cooling fan 102 and the blower 104 located on both sides of the compressor 101 respectively have different air outlet directions. The blower 104 is configured to blow the air inside the compressor compartment 100 to the outside of the compressor compartment 100, so as to ensure the continuous formation of heat dissipation airflow in the compressor compartment 100, and to prevent the two from interfering with each other in the process of suction and air supply, so that the compressor compartment can be prevented from interfering with each other. The cooling airflow in the 100 is more stable and uniform, and the cooling effect is better.

The refrigerating and freezing apparatus 1 of the present invention is formed to accelerate the heat dissipation of the bottom condenser 103 and the compressor 101 by arranging the bottom condenser 103, the cooling fan 102, the compressor 101 and the blower 104 in sequence in the compressor compartment 100 along the air supply direction. A heat dissipation air duct is provided, and a blower 104 for supplying air to the outside of the compressor compartment 100 is provided at the end of the air duct to realize active forced heat dissipation of the compressor 101 and the bottom condenser 103 in the compressor compartment 100, so as to provide air in the refrigerating and freezing device 1 When in the state of embedded setting, the refrigeration system has high heat exchange efficiency and ensures the stable operation of the refrigeration system.

In some embodiments of the present invention, the refrigerating and freezing apparatus 1 further includes a temperature sensor. A temperature sensor can be provided on the bottom condenser 103 to detect its temperature. A temperature sensor can be located in the middle of the bottom condenser 103 to obtain a more accurate temperature of the bottom condenser 103 . Further, the blower 104 may be configured to be controlled to start to perform forced heat dissipation to the compressor compartment 100 when the temperature of the bottom condenser 103 is greater than the ambient temperature and exceeds a preset first difference. At this time, the bottom condenser 103 cannot effectively dissipate heat only under the action of the cooling fan 102, and the opening of the blower 104 can effectively promote the high-temperature air to flow out of the compressor compartment 100 effectively, so as to avoid the occurrence of the compressor 101 or the condenser due to excessive temperature. Fault.

That is, when the heat exchange efficiency of the refrigeration system meets the cooling effect required by the refrigerating and freezing device 1 and the temperature in the compressor compartment 100 is relatively low, the blower 104 may not be turned on, and the bottom condenser 103 can be dissipated only by the cooling fan 102. , in order to save energy consumption and reduce noise.

Specifically, the first difference ΔT ₁ can be any temperature value between 7°C and 13°C, for example, it can be a temperature value such as 7°C, 8°C, 9°C, 10°C, 11°C, 12°C or 13°C .

Further, the blower 104 can also be configured to stop running when the temperature of the bottom condenser 103 drops to a difference value less than a preset second difference ΔT ₂ from the ambient temperature, and only the cooling fan 102 accelerates the bottom heat dissipation area. Ventilation and heat dissipation to save energy and reduce noise. Specifically, the second difference ΔT ₂ may be slightly lower than the first difference ΔT ₁ by 2° C. to 4° C. to avoid the blower 104 being repeatedly turned on and off. The second difference ΔT ₂ can be, for example, any temperature value between 5°C and 10°C, such as 5°C, 6°C, 7°C, 8°C, 9°C, 10°C, or 11°C. It should be noted that the selection of the second difference ΔT ₂ above needs to be determined according to the selection of the first difference ΔT ₁ . If the first difference ΔT ₁ is 10°C, the second difference ΔT ₂ can only be lower than Other values at 10°C. Preferably, the second difference may be 3°C lower than the first difference, for example, when the _first difference ΔT1 is 10°C, the _second difference ΔT2 may be 7°C.

In some embodiments of the invention, the blower 104 may also be started early. Specifically, when the refrigerating and freezing apparatus 1 starts to cool, the cooling fan 102 is configured to start running after the compressor 101 has been running for the first start time, and the blower 104 is configured to start running after the cooling fan 102 has been running for the second start time.

Specifically, the first startup time and the second startup time may be any value between 1 min and 3 min. For example, 1 min, 2 min or 3 min, etc. The first activation time and the second activation time may be the same or different.

That is, the blower 104 can be started together with the refrigeration system of the refrigerating and freezing apparatus 1 to perform forced ventilation and heat dissipation for the compressor compartment 100 in time. In this case, the compressor 101, the cooling fan 102, and the blower 104 can be configured to start delayed in sequence, so as to avoid meaningless operation and reduce energy consumption and noise while ensuring the ventilation and heat dissipation effect.

In some embodiments of the present invention, when the refrigerating and freezing apparatus 1 stops cooling, the blower 104 can also be stopped accordingly, without waiting for the bottom condenser 103 to cool down. Specifically, the blower 104 may be configured to stop running after the compressor 101 stops running for a first stop time, and the cooling fan 102 is configured to stop running after the blower 104 stops running for a second stop time.

Specifically, the first stop time and the second stop time may be any value between 0.2min and 0.6min. For example, 0.2min, 0.3min, 0.4min, 0.5min or 0.6min, etc. The first stop time and the second stop time may be the same or different.

That is, when the compressor 101 stops working, the blower 104 can be stopped first after continuing to blow for a short period of time. The cooling fan 102 may be stopped for a short period of time after the fan 104 is stopped. Due to the transverse opening 106 transversely extending through the compressor compartment 100 , the heat (hot air) generated by both the compressor 101 and the bottom condenser 103 can easily flow out of the compressor compartment 100 . Furthermore, when the compressor 101 is stopped, the heat generated in the compressor compartment 100 is limited, and the heat dissipation requirement can be met only by promoting the air flow in the compressor compartment 100 by the laterally blowing cooling fan 102, and the blown air can be directly discharged from the lateral outlet. Distributed out. Therefore, it is not necessary to continuously operate the blower 104 which is generally perpendicular to the lateral outlet to supply air to the outside, and the heat dissipation requirement of the compressor compartment 100 can be met at this time.

Of course, if the blower 104 is stopped, the temperature of the compressor compartment 100 does not drop significantly. The blower 104 can also be restarted according to the difference between the bottom condenser 103 and the ambient temperature to speed up heat dissipation.

Referring to FIG. 6 , in some embodiments of the present invention, the refrigerating and freezing apparatus 1 further includes a ventilation duct 200 . The ventilation duct 200 is disposed in the bottom space of the box body 10 on the front side of the blower 104 , and the rear end thereof extends backward to meet the air supply port of the blower 104 . Further, the ventilation duct 200 may be configured to have a cross-sectional area that gradually increases from the rear to the front, so that the air flowing out of the compressor bay 100 gradually diffuses and flows forward.

That is, the ventilation duct 200 can guide the cooling airflow blown out by the blower 104 to accelerate out of the compressor compartment 100, but make the cooling airflow speed when it just exits the compressor compartment 100 and enters the ventilation duct 200 is greater than the speed at which it will exit the ventilation duct 200. . Specifically, the ventilation duct 200 is set so that its cross-sectional area near the blower 104 is smaller than its cross-sectional area near the front end of the refrigerating and freezing device 1 , thereby promoting the outflow and diffusion of the cooling airflow, and avoiding standing on the front side of the refrigerating and freezing device 1 . The user can clearly feel the airflow at the bottom.

In some embodiments of the present invention, the distance between the bottom of the ventilation duct 200 and the ground is greater than 10 mm to avoid rubbing against the ground.

Referring to FIG. 1 and FIG. 6 , in some embodiments of the present invention, the refrigerating and freezing apparatus 1 may further include a wind baffle 300 . The windshield baffle 300 can be arranged at the lateral middle position of the bottom of the box body 10, and extends from the front of the bottom wall of the storage compartment to the rear end of the bottom of the box body 10 in the front-rear direction, so as to separate the bottom of the box body 10 from the rear of the bottom wall of the storage compartment. The area is divided into left and right parts, and the air in the two parts is prevented from directly exchanging gas. The blower 104 and the ventilation duct 200 are integrally located on the same side of the windshield baffle 300 in the lateral direction. It should be noted that the horizontal middle position of the bottom of the box body 10 includes but is not limited to the middle position of the box body 10 .

The cooling fan 102 may be configured to be positioned generally directly behind the windscreen 300 . The bottom condenser 103 may occupy the other side of the windshield baffle 300 in the lateral direction, thereby further reducing the possibility of air bypassing the condenser and entering the cooling fan 102 through the guidance of the windshield baffle plate 300 .

In the present embodiment, the air baffle 300 divides the space at the bottom of the refrigerating and freezing apparatus 1 on the front side of the compressor compartment 100 into two parts, the two parts are the air inlets for guiding the air to at least part of the lateral openings 106 respectively. The wind area and the lead-out area that directs the air flowing out of the compressor bay 100 to the outside environment. Further, the air inlet area and the air outlet area are only separated by the air baffle plate 300 at their junctions, so as to prevent the heat exchanged air flow from returning to the side where the bottom condenser 103 is located. Due to the corresponding arrangement of the cooling fan 102 and the blower 104 in the compressor compartment 100 , the peripheral sides of the air inlet area and the air outlet area do not need to be provided with shielding or diversion structures to continuously form heat dissipation airflow, which simplifies the operation of the refrigerating and freezing device 1 . external structure.

In some embodiments of the present invention, the wind shielding baffle 300 may be composed of a heat insulating material, so as to avoid heat exchange between the heat dissipation airflows of different temperatures flowing on both sides of the wind shielding baffle 300 , thereby affecting the heat dissipation effect.

In some embodiments of the present invention, the refrigerating and freezing apparatus 1 may have a temperature sensor that detects the ambient temperature. Further, the side condenser 105 may be configured to operate in a controlled manner when the ambient temperature is less than or equal to a preset upper threshold, so as to assist the cooling system to dissipate heat. Specifically, the upper limit threshold may be any temperature value between 30°C and 40°C, so as to avoid problems such as excessive ambient temperature caused by the side condenser 105 being turned on for a long time. The ambient temperature is the air temperature in the room where the refrigerating and freezing apparatus 1 is located (generally, the user's home). Specifically, a temperature sensor can be arranged in the hinge box of the refrigerating and freezing apparatus 1 for opening and closing the box door of the box 10 to obtain real-time ambient temperature, especially the ambient temperature of the area close to the refrigerating and freezing apparatus 1 .

In some embodiments of the present invention, the refrigerating and freezing apparatus 1 has a free heat dissipation mode and an embedded heat dissipation mode, and can be switched between the two heat dissipation modes according to the different installation positions. Specifically, when the refrigerating and freezing apparatus 1 operates in the free heat dissipation mode, the side condenser 105 is controlled to operate when the ambient temperature is less than or equal to the preset _first upper limit threshold T1. When the refrigerating and freezing apparatus 1 operates in the built-in heat dissipation mode, the side condenser 105 is controlled to operate when the ambient temperature is less than or equal to the preset second upper threshold value T ₂ . Specifically, the _first upper limit threshold T1 is smaller than the _second upper limit threshold T2. That is, the _first upper limit threshold T1 may be any value between 30°C and 35°C. The second upper limit threshold T ₂ may be any value between 36°C and 40°C.

When the refrigerating and freezing apparatus 1 is in a free-standing installation state, the space on its peripheral side allows the user to make contact with the side wall of the box body 10, so by setting the _first upper limit threshold T1 at least lower than the temperature of the human body, the box can be ensured The temperature of the side surface of the body 10 is always within a safe range, thereby ensuring that the user will not feel discomfort due to high temperature when being around the refrigerating and freezing device 1 and in contact with the box body 10 , thereby improving the user's comfort. In addition, when the refrigerating and freezing apparatus 1 is in a built-in installation state, the overheated side temperature will also affect the heating condition of the wall or closet in which it is embedded, resulting in discoloration or deformation of the wall or the closet. Accordingly, the safety temperature, ie the second upper threshold value T ₂ , is also set accordingly. The embedded installation position makes the effect of the side wall temperature of the refrigerating and freezing apparatus 1 less on the ambient temperature, so the second upper limit threshold T ₂ can be correspondingly higher than the first upper limit temperature threshold T ₁ .

In some embodiments of the present invention, the refrigerating and freezing apparatus 1 may further include at least three distance sensors 400 . 2 and 3, three distance sensors 400 can be disposed on the left, right and rear sides of the box body 10, respectively, to detect the refrigerating and freezing device 1 and the walls located on both sides and rear sides thereof, respectively. and/or distance between cabinets. Specifically, a side distance sensor 400 may be installed at a position close to the box door of the refrigerating and freezing apparatus 1 , for example, near the hinge box of the door body. Another side distance sensor 400 may be provided at the lower part of the side plate, for example, near the compressor compartment 100 . The distance sensor 400 on the rear side can be installed at a position close to the middle of the back panel of the box body 10 of the refrigerating and freezing apparatus 1 .

In some embodiments of the present invention, when the distance between the refrigerating and freezing device 1 and the walls and/or cabinets located on both sides thereof is less than or equal to the first distance D ₁ , and the refrigerating and freezing device 1 is located at the rear side wall thereof, the distance is less than or equal to the first distance D 1 . When the distance between the cabinets and/or the cabinets is less than or equal to the _second distance D2, the refrigerating and freezing apparatus 1 operates in the embedded heat dissipation mode.

When the distance between the refrigerating and freezing device 1 and the walls and/or cabinets located on both sides thereof is greater than the first distance D ₁ , or the distance between the refrigerating and freezing device 1 and the walls and/or the cabinets located on the rear side thereof is greater than the first distance D 1 At the _second distance D2, the refrigerating and freezing apparatus 1 operates in a free heat dissipation mode.

That is, only when the two sides and the rear are blocked, the refrigerating and freezing apparatus 1 is determined to be in the embedded state, and the heat dissipation is performed in the embedded heat dissipation mode. When a certain side or back of the refrigerating and freezing device 1 is far enough away from the wall or the cabinet, it can be regarded as being in the free standing mode, and the heat is dissipated in the free heat dissipation mode. In this way, the influence of the long-term operation of the side condenser 105 on the ambient temperature is reduced, and the possibility of discomfort caused by the excessive temperature of the box body 10 when the user picks and places items or moves and touches the refrigerating and freezing apparatus 1 is eliminated.

Specifically, the first distance D ₁ may be any value between 8 mm and 12 mm, for example, may be 8 mm, 9 mm, 10 mm, 11 mm, or 12 mm. The second distance D ₂ may be any value between 12 mm and 17 mm, for example, may be 12 mm, 13 mm, 14 mm, 15 mm, 16 mm or 17 mm, and the like. In some preferred embodiments of the present invention, the _first distance D1 may be set to 10 mm, and the _second distance D2 may be correspondingly set to 15 mm greater than the _first distance D1. That is, the size of the space at the side of the refrigerating and freezing apparatus 1 is given priority to ensure that the temperature of the side condenser 105 will not affect the comfort of the user.

In other embodiments of the present invention, after the refrigerating and freezing device 1 is installed and placed, the user can select the heat dissipation mode of the refrigerating and freezing device 1 through the control input terminal.

The control method for the above-mentioned refrigerating and freezing device of the present invention is suitable for controlling the aforementioned refrigerating and freezing device to conduct ventilation and heat dissipation through appropriate ventilation and heat-dissipation methods under different operating states.

7 is a schematic flowchart of a method for controlling a blower of a refrigerating and freezing apparatus according to an embodiment of the present invention.

Referring to FIG. 7 , the control method may include judging whether the refrigerating and freezing apparatus needs to use the triggering condition of the blower.

Specifically, the following steps may be included:

In step S200, the refrigerating and freezing apparatus starts cooling and operates in any heat dissipation mode.

Step S202, control the compressor and the bottom condenser to start operation, and control the cooling fan to start operation.

In step S210, it is determined whether the temperature of the bottom condenser is higher than the ambient temperature and exceeds the first difference value ΔT ₁ ; if so, step S212 is performed; if not, step S202 is returned to.

Step S212, controlling the blower to start running.

In step S214, it is determined whether the temperature of the bottom condenser has dropped to a difference less than the second difference ΔT ₂ from the ambient temperature; if so, step S216 is performed;

Wherein, the start-up operation in step S212 also includes the maintaining operation when the blower is already in a running state. The blower may be configured to be activated in a controlled manner for forced cooling of the compressor bay only when the temperature of the bottom condenser is greater than the ambient temperature by a preset first difference ΔT ₁ . At this time, the bottom condenser can not effectively dissipate heat only under the action of the cooling fan. The opening of the blower can effectively promote the high-temperature air to flow out of the compressor compartment effectively, and prevent the compressor or condenser from malfunctioning due to excessive temperature.

Further, when the heat exchange efficiency of the refrigeration system meets the refrigeration effect required by the refrigerating and freezing device, and the temperature in the compressor compartment is relatively low, the blower may not be turned on, and only the bottom condenser is dissipated by the cooling fan to save energy consumption. Reduce noise. In addition, the second difference value ΔT ₂ for judging the off condition of the blower may be slightly lower than the first difference value ΔT ₁ for judging its on condition by 2°C to 4°C to avoid the blower being repeatedly turned on and off.

8 is a schematic flowchart of a method for controlling a blower of a refrigerating and freezing apparatus according to another embodiment of the present invention. 9 is a schematic flowchart of a method for controlling a blower of a refrigerating and freezing apparatus according to still another embodiment of the present invention.

Referring to FIG. 8 , the control method can also control the blower to start up in advance to enhance the ventilation and heat dissipation effect of the refrigerating and freezing device. Specifically, the following steps may be included:

In step S300, the refrigeration system of the refrigerating and freezing apparatus is turned on, and the forced heat dissipation function is turned on.

Step S302, start the compressor.

In step S304, it is determined whether the compressor has been running for the first start-up time; if yes, step S306 is executed; if not, step S302 is returned to.

Step S306, start the cooling fan.

In step S308, it is judged whether the cooling fan has been running for the second start-up time; if so, step S310 is executed; if not, step S306 is returned to.

Step S310, start the blower.

Wherein, if the compressor or the cooling fan is already in the running state, steps S302 and S306 may also include maintaining the running state accordingly. Further, the first activation time and the second activation time may be any value between 1 min and 3 min. For example, 1 min, 2 min or 3 min, etc. The first activation time and the second activation time may be the same or different.

In this way, the blower can be controlled to start together with the refrigeration system of the refrigerating and freezing device to perform forced ventilation and heat dissipation for the compressor compartment in time. In this case, the compressor, cooling fan and blower can be configured to start delayed in sequence to avoid meaningless operation and reduce energy consumption and noise on the premise of ensuring the ventilation and heat dissipation effect.

Also, see FIG. 9 . When the refrigerating and freezing device stops cooling, the blower can also be stopped to reduce energy consumption. Specifically, the following steps may be included:

In step S400, the refrigeration system is turned off.

Step S402, the compressor is controlled to stop running.

Step S404, it is judged whether the compressor has been stopped for the first stop time; if yes, go to step S406; if not, go back to go to step S402.

Step S406, controlling the blower to stop running.

In step S408, it is determined whether the blower has been stopped for the second stop time; if so, step S410 is performed; if not, step S406 is returned to.

Step S410, controlling the cooling fan to stop running.

Wherein, if the compressor or the blower is already in the shutdown state, steps S402 and S406 may also include maintaining the shutdown state accordingly. Further, the first stop time and the second stop time may be any value between 0.2min and 0.6min. For example, 0.2min, 0.3min, 0.4min, 0.5min or 0.6min, etc. The first stop time and the second stop time may be the same or different.

Therefore, when the compressor stops working, the blower can be stopped first after continuing to blow for a short period of time. The cooling fan can be stopped for a short time after the blower is stopped. Since the transverse openings transversely penetrating the compressor compartment are provided, the heat (hot air) generated by both the compressor and the bottom condenser can easily flow out of the compressor compartment. Furthermore, when the compressor is stopped, the heat generated in the compressor compartment is limited, and the cooling fan in the compressor compartment can only promote the air flow in the compressor compartment to meet the heat dissipation requirements, and the blown air can be directly emitted from the lateral outlet. As a result, it is not necessary to continuously operate the blower that is generally perpendicular to the lateral outlet to supply air to the outside, so as to meet the heat dissipation demand of the compressor compartment at this time.

If the blower is stopped, the temperature of the compressor compartment does not drop significantly. The blower can also be restarted according to the control method in steps S210 to S214 to enhance the heat dissipation effect of the compressor compartment.

10 is a schematic flowchart of a control method for judging the installation state of a refrigerating and freezing apparatus according to an embodiment of the present invention.

Referring to FIG. 10 , the control method may include judging the installation position of the refrigerating and freezing apparatus. Specifically, the following steps may be included:

In step S100, the refrigerating and freezing apparatus is started to operate.

Step S106, the rear distance sensor is controlled to detect whether the distance between the refrigerating and freezing device and the rear shield is less than the second distance; if yes, go to step S108; if not, go to step S112.

In step S108, the distance sensors on both sides are controlled to detect whether the distances between the refrigerating and freezing device and the shields on the left and right sides are both smaller than the first distance; if so, go to step S110; if not, go to step S112.

In step S110, the refrigerating and freezing apparatus is controlled to enter the embedded heat dissipation mode.

In step S112, the refrigerating and freezing apparatus is controlled to enter a free heat dissipation mode.

Specifically, the first distance D ₁ may be any value between 8 mm and 12 mm, and the second distance D ₂ may be greater than the first distance D ₁ and may be any value between 12 mm and 17 mm.

That is, when the refrigerating and freezing device is started for the first time or restarted after each power failure, it is detected whether the rear side and both sides of the refrigerating device are blocked to confirm the cooling mode that it should operate.

The control method can ensure that the refrigerating and freezing device is determined to be in the embedded state only when the two sides and the rear of the refrigerating and freezing device are blocked, and the heat dissipation is carried out in the embedded heat dissipation mode. When a side or back of the refrigerator-freezer is far enough away from the wall or cabinet, it can be considered to be in free-standing mode and dissipate heat in free-cooling mode. Therefore, the influence of the long-term operation of the side condenser on the ambient temperature is reduced, and the possibility of discomfort caused by the excessive temperature of the box body when the user picks and places items or moves and touches the refrigerating and freezing device is eliminated.

11 is a schematic flowchart of a control method for judging the installation state of a refrigerating and freezing apparatus according to another embodiment of the present invention.

Referring to FIG. 11, in some embodiments of the present invention, the control method may further include the following steps before step S106:

Step S102, keep the refrigerating and freezing device continuously running the current heat dissipation mode;

In step S104, it is judged whether it has been 24 hours since the last distance detection; if yes, go to step S106; if not, return to continue to execute step S102.

That is, it is detected every 24 hours whether the refrigerating and freezing device has moved, so as to determine whether the two sides and the rear are blocked. Therefore, the plurality of distance detection sensors do not need to work continuously, which saves energy consumption and prolongs their service life.

12 is a schematic flowchart of a control method for a refrigerating and freezing apparatus operating in an embedded heat dissipation mode according to an embodiment of the present invention, and FIG. 13 is a control method for a refrigerating and freezing apparatus operating in a self-heating mode according to an embodiment of the present invention. Schematic flow chart.

Referring to FIG. 12 and FIG. 13 , the control method of the present invention further includes judging whether the refrigerating and freezing device needs to use the triggering condition of the side condenser in different heat dissipation modes. Specifically, referring to FIG. 12 , when the refrigerating and freezing device is in the embedded heat dissipation mode, the control method may include the following steps:

In step S200, the refrigerating and freezing apparatus starts to cool and operates in the embedded heat dissipation mode.

Step S202, control the compressor and the bottom condenser to start operation, and control the cooling fan to start operation.

Step S204, it is judged whether the ambient temperature is less than the second upper limit threshold T ₂ ; if so, go to step S206 ; if not, go to step S208 .

In step S206, the side condenser is activated to assist heat dissipation.

Step S208, stop the side condenser.

In step S210, it is determined whether the temperature of the bottom condenser is higher than the ambient temperature and exceeds the first difference; if so, step S212 is performed; if not, step S202 is returned to.

Step S212, controlling the blower to start running.

In step S214, it is determined whether the temperature of the bottom condenser has dropped to a difference less than the second difference from the ambient temperature; if yes, then step S216 is executed;

Specifically, the second upper limit threshold T ₂ may be any value between 36°C and 40°C. For example, 36°C, 37°C, 38°C, 39°C or 40°C. Therefore, when the refrigerating and freezing device is in a built-in installation state, the overheated side temperature will affect the heating condition of the wall or closet in which it is embedded, causing the wall or the closet to be discolored or deformed. By setting the second upper limit threshold as a safety temperature, it is avoided that the outer surface temperature of the refrigerator-freezer whose side is in contact with the wall or the closet is too high. Preferably, the second upper limit threshold T ₂ can be set to 40° C. to obtain the best heat dissipation effect.

Referring to FIG. 13 , when the refrigerating and freezing device is in the free heat dissipation mode, the control method may include the following steps:

In step S200, the refrigerating and freezing apparatus starts to cool and operates in the embedded heat dissipation mode.

Step S202, control the compressor and the bottom condenser to start operation, and control the cooling fan to start operation.

Step S204, determine whether the ambient temperature is less than the _first upper limit threshold T1; if yes, go to step S206; if not, go to step S208.

In step S206, the side condenser is activated to assist heat dissipation.

Step S208, stop the side condenser.

In step S210, it is determined whether the temperature of the bottom condenser is higher than the ambient temperature and exceeds the first difference; if so, step S212 is performed; if not, step S202 is returned to.

Step S212, controlling the blower to start running.

In step S214, it is determined whether the temperature of the bottom condenser has dropped to a difference less than the second difference from the ambient temperature; if yes, then step S216 is executed;

Specifically, the _first upper limit threshold T1 may be any value between 30°C and 35°C. For example, 30°C, 31°C, 32°C, 33°C, 34°C or 35°C. Preferably, the _first upper limit threshold T1 can be set to 33°C to ensure that the user will not feel discomfort due to high temperature when being around the refrigerating and freezing device and in contact with the box, thereby improving the user's comfort.

14 is a schematic flowchart of a control method for a refrigerating and freezing apparatus operating in an embedded heat dissipation mode according to another embodiment of the present invention. Specifically include the following steps:

In step S200, the refrigerating and freezing apparatus starts to cool and operates in the embedded heat dissipation mode.

Step S202, control the compressor and the bottom condenser to start operation, and control the cooling fan to start operation.

In step S203, it is determined whether the temperature of the bottom condenser is higher than the ambient temperature and exceeds the third difference value ΔT ₃ ; if so, step S206 is directly executed; if not, step S204 is executed.

Step S204, it is judged whether the ambient temperature is lower than the second upper limit threshold; if yes, go to step S206; if not, go to step S208.

In step S206, the side condenser is activated to assist heat dissipation.

Step S208, stop the side condenser.

In step S210, it is determined whether the temperature of the bottom condenser is higher than the ambient temperature and exceeds the first difference; if so, step S212 is performed; if not, step S202 is returned to.

Step S212, controlling the blower to start running.

In step S214, it is determined whether the temperature of the bottom condenser has dropped to a difference less than the second difference from the ambient temperature; if yes, then step S216 is executed;

Wherein, the third difference in the above step S203 is greater than the first difference. Specifically, it can be a temperature value greater than or equal to 13°C. Preferably, the third difference is not greater than 15°C. That is to say, in order to avoid the problem of poor heat dissipation due to surrounding shielding when the refrigerating and freezing device is operating in the embedded heat dissipation mode, thereby causing the problem that the temperature of the bottom condenser is too high, the control method in this embodiment can also set the limit temperature. The difference, which is the third difference, detects whether the bottom condenser temperature is too high. Specifically, when the temperature of the bottom condenser is too high (the temperature of the bottom condenser is higher than the ambient temperature by more than the third difference), no matter what the ambient temperature is, the side condenser is forced to operate to ensure the safe operation of the refrigeration system .

By now, those skilled in the art will recognize that, although various exemplary embodiments of the present invention have been illustrated and described in detail herein, the present invention may still be implemented in accordance with the present disclosure without departing from the spirit and scope of the present invention. The content directly determines or derives many other variations or modifications consistent with the principles of the invention. Accordingly, the scope of the present invention should be understood and deemed to cover all such other variations or modifications.

Claims (10)

1. A control method of a refrigerator-freezer comprising: the compressor comprises a box body and a compressor bin arranged below the rear part of the box body; the compressor bin is internally provided with a bottom condenser communicated with the compressor to dissipate heat of a refrigerating system, and the inside of at least one side wall of the box body is provided with a side condenser; the control method comprises the following steps:

acquiring the ambient temperature of the environment where the refrigeration and freezing device is located;

and when the ambient temperature is less than or equal to a preset upper limit threshold value, starting a side condenser to perform auxiliary heat dissipation on the refrigeration system.

2. The control method according to claim 1,

the refrigeration and freezing device has a free heat dissipation mode and an embedded heat dissipation mode;

the control method comprises the following steps:

when the refrigeration and freezing device operates in the free heat dissipation mode, starting the side condenser when the ambient temperature is less than or equal to a preset first upper limit threshold; and

when the refrigeration and freezing device operates in the embedded heat dissipation mode, starting the side condenser when the ambient temperature is less than or equal to a preset second upper threshold; and is

The first upper threshold is less than the second upper threshold.

3. The control method according to claim 2, further comprising:

acquiring the distance between the refrigerating and freezing device and the wall and/or the cabinet body positioned on the two sides and the rear side of the refrigerating and freezing device; and determining the heat dissipation mode of the refrigeration and freezing device according to the obtained result.

4. The control method according to claim 3, further comprising:

when the distance between the refrigerating and freezing device and the wall body and/or the cabinet body positioned on the two sides of the refrigerating and freezing device is smaller than or equal to a first distance, and the distance between the refrigerating and freezing device and the wall body and/or the cabinet body positioned on the rear side of the refrigerating and freezing device is smaller than or equal to a second distance, the refrigerating and freezing device is enabled to operate in an embedded heat dissipation mode; and

and when the distance between the refrigerating and freezing device and the wall body and/or the cabinet body positioned at the two sides of the refrigerating and freezing device is larger than a first distance, or the distance between the refrigerating and freezing device and the wall body and/or the cabinet body positioned at the rear side of the refrigerating and freezing device is larger than a second distance, the refrigerating and freezing device runs in a free heat dissipation mode.

5. The control method according to claim 1,

a cooling fan, a compressor and a blower are also arranged in the compressor bin; and is

The cooling fan is configured to cause air to flow from the bottom condenser to the blower via the cooling fan and the compressor in sequence;

the control method further comprises the following steps:

obtaining the bottom condenser temperature and the ambient temperature; and

when the temperature of the bottom condenser is higher than the ambient temperature and exceeds a preset first difference value, starting the air blower to perform forced heat dissipation on the compressor bin; and

and when the temperature of the bottom condenser is reduced to a second difference value smaller than the first difference value, the blower is controlled to stop.

6. The control method according to claim 5,

the front side of the bottom of the compressor bin has a transverse opening to allow air to flow into or out of the compressor bin; and is

The blower is configured to have its supply outlet disposed toward at least a portion of the lateral opening to cause air flowing thereto to accelerate out of the compressor compartment through the lateral opening and to cause air flowing out of the compressor compartment to continue to flow forwardly.

7. The control method according to claim 5, further comprising:

starting the compressor when the refrigeration and freezing device starts to refrigerate;

starting the cooling fan after the compressor operates for a first starting time; and

and starting the air blower after the cooling fan operates for a second starting time.

8. The control method according to claim 5, further comprising:

turning off the compressor when the refrigeration and freezing device stops refrigerating;

turning off the blower after the compressor stops running for a first stop time; and

and after the blower stops running for a second stop time, closing the cooling fan.

9. The control method of claim 6, the refrigeration freezer further comprising:

the ventilating duct is arranged in the bottom space of the box body positioned at the front side of the blower, and the rear end of the ventilating duct extends backwards to be in butt joint with the air supply outlet of the blower; and is

The ventilation duct is configured to have a cross-sectional area gradually increasing from the rear to the front so that the air flowing out of the compressor compartment gradually diffuses and flows forward.

10. The control method of claim 9, the refrigeration freezer further comprising:

the wind baffle plate is arranged at the transverse middle position of the bottom of the box body and extends backwards from the front part of the bottom wall of the box body to the rear end of the bottom of the box body along the front-back direction so as to divide the bottom area of the box body into a left part and a right part and prevent air in the two parts from directly exchanging gas; wherein

The blower and the ventilation duct are both located integrally on the same side of the wind-shielding partition in the lateral direction.

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