CN110274420B

CN110274420B - Control method of refrigerating and freezing device

Info

Publication number: CN110274420B
Application number: CN201810209898.1A
Authority: CN
Inventors: 何胜涛; 王铭; 徐同; 牟森
Original assignee: Haier Smart Home Co Ltd
Current assignee: Haier Smart Home Co Ltd
Priority date: 2018-03-14
Filing date: 2018-03-14
Publication date: 2020-08-28
Anticipated expiration: 2038-03-14
Also published as: CN110274420A

Abstract

The invention provides a control method of a refrigeration and freezing device, wherein the refrigeration and freezing device comprises a box body and a compressor bin arranged below the rear part of the box body; a bottom condenser communicated with the variable frequency compressor is arranged in the compressor bin, and a side condenser is arranged in at least one side wall of the box body; the control method comprises the following steps: acquiring the ambient temperature of the environment where the refrigeration and freezing device is located; when the ambient temperature is less than or equal to a preset upper limit threshold, starting a side condenser to perform auxiliary heat dissipation on the refrigeration system; setting the limit temperature difference of a bottom condenser; acquiring the temperature of a bottom condenser, and judging whether the temperature is higher than the ambient temperature by a limit temperature difference; and when the temperature of the bottom condenser is continuously higher than the ambient temperature within a preset limit duration to reach a limit temperature difference, starting the side condenser to perform auxiliary heat dissipation on the refrigeration system. The control method can control the side condenser to be controlled and started when necessary so as to carry out auxiliary heat dissipation and improve the heat dissipation effect and the 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

Refrigeration freezers typically have a volume. When a household refrigerating and freezing device, such as a refrigerator, is placed in a restaurant, a kitchen, etc., it may protrude outward from the wall, which is disadvantageous in saving space and beautifying the appearance. At present, in order to beautify the indoor environment and save space, an embedded refrigerator is usually installed in a cabinet or a wall body as a component of a kitchen or a restaurant, is convenient to use and optimizes the indoor space, but airflow in the cabinet or the wall body is easily blocked, a heat dissipation system is difficult to ventilate, the ventilation and heat dissipation effects of the refrigerator are reduced, and the use performance of the embedded refrigerator cannot be met.

Disclosure of Invention

An object of the present invention is to provide a method for controlling a refrigerating and freezing apparatus having a good ventilation and heat dissipation effect.

A further object of the present invention is to improve the ventilation and heat dissipation of a refrigeration chiller and to reduce its energy consumption.

In particular, the present invention provides a control method of a refrigerating and freezing apparatus including: 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 variable frequency compressor and a bottom condenser communicated with the variable frequency compressor so as to dissipate heat of a refrigerating system, and a side condenser is arranged in at least one side wall of the box body; the control method comprises the following steps:

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

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; and

setting a limit temperature difference of the bottom condenser, acquiring the temperature of the bottom condenser, and judging whether the temperature is higher than the environment temperature and reaches the limit temperature difference; and

and when the temperature of the bottom condenser is continuously higher than the ambient temperature within a preset limit duration to reach the limit temperature difference, the side condenser is started to perform auxiliary heat dissipation on the refrigeration system.

Further, the control method further includes:

setting a reference current of the variable frequency compressor and acquiring an instant current of the variable frequency compressor during operation;

and when the instant current exceeds the reference current and reaches a preset current early warning threshold value, reducing the rotating speed of the variable frequency compressor.

Further, 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.

Further, the control method further includes:

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.

Further, the control method further includes:

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.

Furthermore, a cooling fan, a variable frequency 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 inverter 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 by a preset first difference value, starting the blower to perform forced heat dissipation on the compressor bin; and

and when the temperature of the bottom condenser is higher than the ambient temperature and is reduced to a preset second difference value which is smaller than the first difference value, controlling the blower to stop.

Further, the bottom front side of the compressor bin has a lateral 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.

Further, the control method further includes:

when the refrigerating and freezing device starts to refrigerate, starting the variable frequency compressor;

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

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

Further, the control method further includes:

when the refrigeration and freezing device stops refrigerating, the variable frequency compressor is turned off;

when the inverter compressor stops running for a first stop time, the blower is turned off; and

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

Further, the refrigerating and freezing apparatus further includes:

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

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 ventilation duct is configured to have a cross-sectional area gradually increasing from the rear to the front so as to gradually diffuse the flow of air flowing out of the compressor compartment to the front; and is

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

The control method of the invention enables the side condenser to provide an additional auxiliary heat radiation way for the refrigerating system if necessary, and enables the refrigeration and freezing device to realize the simultaneous heat radiation of the side condenser and the bottom condenser, thereby further improving the heat exchange efficiency of the heat exchange system of the refrigeration and freezing device.

Furthermore, the control method of the invention can also start the air blower to carry out active forced heat dissipation when the condenser at the bottom of the refrigeration and freezing device can not carry out effective heat dissipation, thereby effectively promoting high-temperature air to flow out of the compressor bin in an accelerated manner and avoiding the fault of the variable frequency compressor or the condenser caused by overhigh temperature.

Further, when the heat exchange efficiency of the refrigerating system meets the refrigerating effect required by the refrigerating and freezing device and the temperature in the compressor bin is relatively low, the air blower can be turned off under the control of the control method, and the bottom condenser is only cooled through the cooling fan, so that the energy consumption is saved, and the noise is reduced.

The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.

Drawings

Some specific embodiments of the invention will be described in detail hereinafter, by way of illustration and not limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:

fig. 1 is a schematic front view of a refrigeration freezer in accordance with one embodiment of the invention;

fig. 2 is a schematic rear view of a refrigerated freezer according to one embodiment of the invention;

figure 3 is a schematic side view of a refrigerated freezer according to one embodiment of the invention;

FIG. 4 is a schematic and diagrammatic view of a refrigeration system according to another embodiment of the present invention;

FIG. 5 is a schematic top plan view of a compressor compartment and bin base structure of a refrigerated freezer according to yet another embodiment of the invention, with a plurality of arrows showing the direction of flow of the cooling airflow;

fig. 6 is a schematic side view of a refrigeration and freezing apparatus according to another embodiment of the present invention, in which a portion of a side plate of the inverter compressor and a side plate of the box body are hidden to show an inner structure thereof;

fig. 7 is a schematic flow chart of a blower control method of a refrigeration freezer according to one embodiment of the present invention;

fig. 8 is a schematic flow chart of a blower control method of a refrigeration freezer according to another embodiment of the present invention;

fig. 9 is a schematic flow chart of a blower control method of a refrigeration freezer according to yet another embodiment of the present invention;

fig. 10 is a schematic flow chart of a control method of determining an installation state of a refrigeration chiller according to an embodiment of the present invention;

fig. 11 is a schematic flow chart of a control method of determining an installation state of a refrigeration chiller according to another embodiment of the present invention;

fig. 12 is a schematic flow chart of a control method for operating a refrigeration chiller in an embedded heat rejection mode in accordance with one embodiment of the present invention;

fig. 13 is a schematic flow chart of a control method for operating a refrigeration chiller in an embedded heat rejection mode according to another embodiment of the present invention.

Detailed Description

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, in which a part of a cabinet back plate is hidden at the bottom to show the internal structure thereof. FIG. 3 is a schematic side perspective view of a condenser and air duct according to one embodiment of the invention with portions of the cabinet side panels hidden to show the internal structure thereof.

Referring to fig. 1 to 3, a refrigerating and freezing apparatus 1 to which the control method of the present invention can be applied may generally include a cabinet 10 and a compressor compartment 100. A storage compartment is defined in the case 10. The storing compartment can be set up as a plurality ofly according to the demand. The storage compartment may have a forward opening allowing access to the articles from the storage compartment or from the storage compartment. The refrigerating and freezing device 1 may further have a plurality of door bodies to rotatably open or close the forward opening of the storage compartment from one or both lateral sides of the body 10. The compressor bin 100 may be disposed below the rear portion of the cabinet 10 to mount a refrigeration structure that houses an inverter compressor 110 and the like. The refrigerating and freezing device 1 may be an embedded refrigerator, at least a refrigerating chamber and a freezing chamber are defined in the cabinet 10, and the refrigerating and freezing device 1 is configured to be embedded in a wall and/or a cabinet and allow both sides and a back of the cabinet 10 to be close to the wall and/or the cabinet.

It will be understood by those skilled in the art that, in the case of a built-in refrigerator, the term "close" as used herein means that a ventilation space may not be exclusively reserved between the sides and back of the refrigerator cabinet 10 and the surrounding walls and/or cabinets, and the space between the sides and back of the refrigerator cabinet 10 and the surrounding walls and/or cabinets may be as small as possible while ensuring that the refrigerator cabinet 10 can be placed in the built-in space. Of course, the refrigerating and freezing apparatus 1 may be provided in a relatively open space with no shielding on the peripheral side. Accordingly, when the refrigeration and freezing device 1 is in different states (embedded with shielding or free standing with no shielding), the refrigeration and freezing device 1 can respectively operate different heat dissipation modes to dissipate heat of the refrigeration system.

Fig. 4 is a schematic and diagrammatic view of a refrigeration system in accordance with another embodiment of the present invention.

Referring to fig. 2 to 4, the refrigerating and freezing apparatus 1 has a compression refrigeration system, and includes refrigeration devices such as an inverter compressor 101, a cooling fan 102, a condenser, and an evaporator 500. Specifically, the inverter compressor 101 and the cooling fan 102 may both be disposed inside the compressor compartment 100, and the inverter compressor 101 may be configured to be located downstream of the cooling fan 102 air supply path. The bottom front side of the compressor compartment 100 has a lateral opening 106 to allow air to flow into or out of the compressor compartment 100 from the front lower side of the compressor compartment 100. In particular, the condenser may comprise: a bottom condenser 103 and a side condenser 105. The bottom condenser 103 may be disposed within the compressor bin 100 and in communication with the inverter compressor 101. The bottom condenser 103 may be configured to be located upstream of the cooling fan 102 supply air path to dissipate heat from the refrigeration system. The side condenser 105 may be one or more and may be disposed inside at least one sidewall of the cabinet 10 and configured for optionally controlled operation to provide auxiliary heat rejection for the refrigeration system as necessary. In some embodiments of the present invention, the side condensers 105 may be two and disposed in the left and right sidewalls of the cabinet 10, respectively, to improve heat dissipation.

Referring to fig. 4, in some embodiments of the invention, side condenser 105 is configured to be placed in parallel with bottom condenser 103 via a control valve and to operate simultaneously with bottom condenser 103 via controlled communication of the control valve to collectively dissipate heat from the refrigeration system.

That is, the side condenser 105 can provide an additional auxiliary heat dissipation path for the refrigeration system when necessary, so that the refrigeration and freezing device 1 can dissipate heat of the side condenser 105 and the bottom condenser 103 at the same time, the heat exchange efficiency of the heat exchange system of the refrigeration and freezing device 1 is further improved, and the stable operation of the refrigeration system is ensured.

The refrigerating and freezing device 1 of the invention is provided with the bottom condenser 103, the cooling fan 102 and the variable frequency compressor 101 in sequence along the flowing direction of the heat dissipation airflow in the compressor bin 100, thereby forming a heat dissipation area at the bottom of the refrigerating and freezing device 1, so that when the refrigerating and freezing device 1 is arranged at a position surrounded by a wall or a cabinet in an embedded manner, a refrigeration system can dissipate heat through the heat dissipation area at the bottom, and the stable operation of the refrigeration system is ensured.

Further, the refrigeration and freezing apparatus 1 can also perform auxiliary heat dissipation through the side condenser 105 as necessary, thereby further improving the heat dissipation effect and the heat exchange efficiency of the refrigeration system.

Referring to fig. 5 and 6, in some embodiments of the invention, the refrigerated freezing apparatus 1 may further include a blower 104. A blower 104 may be disposed within the compressor compartment 100 and downstream of the inverter compressor 101 and the cooling fan 102 supply path. That is, the cooling fan 102 is configured to draw air into the compressor compartment 100 via at least a portion of the lateral opening 106 and cause it to flow in a lateral direction sequentially through the bottom condenser 103, the cooling fan 102, and the inverter compressor 101 to the blower 104. The blower 104 then causes the air flowing thereto that has completed heat exchange with the refrigeration unit to accelerate out of the compressor compartment 100 from at least a portion of the lateral opening 106.

In the present embodiment, referring to fig. 5, a cooling fan 102 and a blower fan 104 are respectively provided on both sides of an inverter compressor 101, and a bottom condenser 103 and the inverter compressor 101 are respectively provided on both sides of the cooling fan 102. Therefore, each refrigerating device is at least adjacent to one fan, the tail end of a flow path of the heat dissipation airflow is provided with an air blower 104 which is specially used for accelerating the outflow of the heat dissipation airflow which is used for promoting the heat exchange between the refrigerating device and the compressor bin 100 and has higher temperature, so that the peripheral side of each refrigerating device is ensured to continuously have the flowing heat dissipation air, the air blower 104 can force the heat dissipation air to flow out of the compressor bin 100 after the heat dissipation air completes the heat exchange so as to realize the active forced heat dissipation, further the integral heat dissipation efficiency in the compressor bin 100 is further enhanced, and particularly, when the refrigerating and freezing device 1 is arranged at the position with shielding at the peripheral side in an embedded mode, the heat dissipation effect and the heat exchange effect of the refrigerating system can.

In some embodiments of the invention, the compressor bin 100 may be configured to extend in a lateral direction and be located at a lower rear portion of the refrigerated freezer 1. Accordingly, the casing 10 defining the storage compartment may be inwardly recessed at a rear lower portion thereof to allow the compressor compartment 100 to be disposed in the recessed portion, and a gap may be left between a front surface of the compressor compartment 100 and a rear surface of the casing 10 to allow an air flow to pass therethrough.

In other embodiments of the present invention, referring to fig. 6, the front surface of the compressor compartment 100 may also be directly in contact with the rear surface of the box 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 case 10, to allow the air flow to pass therethrough. Further, the air outlet guide of the blower 104 may also extend out of the compressor compartment 100 directly from the lateral opening 106 and extend forward to the bottom of the casing 10 to guide and accelerate the heat dissipating air flow out of the compressor compartment 100 forward.

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

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

The cooling fan 102 is configured to cause air in the compressor compartment 100 to flow in a lateral direction from the end of the bottom condenser 103 toward the side of the inverter compressor 101, thereby providing a lower airflow pressure at the bottom condenser 103 for easier intake of outside air. Furthermore, since the cooling fan 102 sucks and blows air in the lateral direction inside the compressor compartment 100, it is possible to avoid a large amount of outside air from bypassing the bottom condenser 103 and directly entering the cooling fan 102 from the lateral opening 106 at the bottom front side of the compressor compartment 100. Further, the small portion of air entering the compressor compartment 100 via the lateral opening 106 proximate the cooling fan 102 may also supplement the heat sink airflow that has passed through the bottom condenser 103, enhancing its subsequent heat sink effect on the inverter compressor 101. The heat-dissipating airflow after heat exchange can also flow out of the compressor bin 100 along any position of the transverse opening 106, which is equivalent to increase the areas of the air inlet and the air outlet of the compressor bin 100, promote the flow of the heat-dissipating airflow, and improve the heat-dissipating efficiency.

In some embodiments of the invention, the blower 104 is configured with its supply outlet disposed toward at least a portion of the lateral opening 106 to encourage the air flowing out of the compressor compartment 100 to continue to flow forward. That is, the cooling fan 102 and the blower 104 respectively located at two sides of the inverter compressor 101 have different air outlet directions, the cooling fan 102 is configured to promote air to flow through the condenser and the inverter compressor 101 along the transverse direction of the compressor compartment 100, and the blower 104 is configured to blow air in the compressor compartment 100 to the outside of the compressor compartment 100, so that the mutual interference between the cooling fan and the blower in the air suction and air supply process is avoided while the heat dissipation air flow is continuously formed in the compressor compartment 100, the heat dissipation air flow in the compressor compartment 100 is more stable and uniform, and the heat dissipation effect is better.

The refrigeration and freezing device 1 of the invention is provided with a bottom condenser 103, a cooling fan 102, an inverter compressor 101 and a blower 104 in sequence along the air supply direction in a compressor bin 100, thereby forming a heat dissipation air path for accelerating the heat dissipation of the bottom condenser 103 and the inverter compressor 101, and the blower 104 for supplying air to the outside of the compressor bin 100 is arranged at the tail end of the air path to realize the active forced heat dissipation of the inverter compressor 101 and the bottom condenser 103 in the compressor bin 100, so that when the refrigeration and freezing device 1 is in an embedded state, the refrigeration system has high heat exchange efficiency, and the stable operation of the refrigeration system is ensured.

In some embodiments of the invention, the refrigerated freezing apparatus 1 further comprises a temperature sensor. A temperature sensor may be provided on the bottom condenser 103 to detect the temperature thereof. A temperature sensor may be located in the middle of the bottom condenser 103 to obtain a more accurate bottom condenser 103 temperature. Further, the blower 104 may be configured to be controlled to activate to forcibly dissipate heat from the compressor bin 100 when the temperature of the bottom condenser 103 is greater than the ambient temperature by 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 blower 104 is turned on to effectively accelerate high-temperature air to flow out of the compressor bin 100, so that the frequency conversion compressor 101 or the condenser is prevented from being in failure due to overhigh temperature.

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

Specifically, the first difference Δ T₁The temperature can be any value between 7 ℃ and 13 ℃, for example, 7 ℃, 8 ℃, 9 ℃, 10 ℃, 11 ℃, 12 ℃ or 13 ℃.

Further, the blower 104 may be configured to cool the bottom condenser 103 when the temperature of the bottom condenser falls below a second predetermined difference Δ T from the ambient temperature₂When the cooling fan is stopped, the cooling fan 102 only accelerates the ventilation and heat dissipation of the bottom heat dissipation area, so that the energy consumption is saved and the noise is reduced. In particular, the second difference Δ T₂Can be compared with the first difference value delta T₁Slightly below 2 deg.C to 4 deg.C to avoid repeated opening and closing of the blower 104. Second difference Δ T₂Specifically, the temperature may be any temperature of, for example, 5 ℃ to 10 ℃, and may be, for example, 5 ℃, 6 ℃, 7 ℃, 8 ℃, 9 ℃, 10 ℃ or 11 ℃. When it is noted that, the above second difference Δ T₂Is selected according to the first difference value delta T₁Is determined if the first difference Δ T is greater than the first threshold₁At 10 ℃, the second difference Δ T₂Other values below 10 ℃ are possible. Preferably, the second difference may be 3 ℃ lower than the first difference, for example when the first difference Δ T is₁At 10 ℃, the second difference DeltaT₂May be 7 deg.c.

In some embodiments of the invention, the blower 104 may also be activated prematurely. Specifically, when the refrigeration freezer 1 starts cooling, the cooling fan 102 is configured to start operating after the inverter compressor 101 has been operated for a first start-up time, and the blower 104 is configured to start operating after the cooling fan 102 has been operated for a second start-up time.

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

That is, the blower 104 may be activated along with the refrigeration system of the refrigeration freezer 1 to provide forced ventilation and heat dissipation to the compressor compartment 100 in a timely manner. In this case, the inverter compressor 101 and the cooling fan 102 may be configured to be sequentially started in a delayed manner, so as to avoid meaningless operation and reduce energy consumption and noise while ensuring ventilation and heat dissipation effects.

In some embodiments of the present invention, when the refrigeration freezer 1 stops cooling, the blower 104 may also be stopped without waiting for the bottom condenser 103 to cool down. Specifically, the blower 104 may be configured to stop operating after the inverter compressor 101 stops operating for a first stop time, and the cooling fan 102 may be configured to stop operating after the blower 104 stops operating for a second stop time.

Specifically, the first stop time and the second stop time may be any value between 0.2min and 0.6 min. 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 inverter compressor 101 stops operating, the blower 104 may stop after continuing blowing for a short time. The cooling fan 102 may be stopped after a short time after the blower 104 is stopped. Due to the provision of the transverse opening 106 extending transversely through the compressor compartment 100, the heat (hot air) generated by either the inverter compressor 101 or the bottom condenser 103 is relatively easy to flow out of the compressor compartment 100. Furthermore, after the inverter compressor 101 is stopped, the heat generated in the compressor compartment 100 is limited, the air in the compressor compartment 100 is forced to flow only by the cooling fan 102 blowing in the transverse direction, so that the heat dissipation requirement can be met, and the blown air can be directly diffused and flow out from the transverse outlet. Thus, the heat dissipation requirements of the compressor compartment 100 at this time can be met without the need to continuously run the blower 104 that blows air outwardly substantially perpendicular to the lateral outlet.

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

Referring to fig. 5, in some embodiments of the invention, the refrigerated freezer 1 further comprises a ventilation duct 200. The ventilation duct 200 is provided in the bottom space of the casing 10 at the front side of the blower 104, and its rear end extends rearward to be in abutment with the air supply opening 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 compartment 100 gradually diffuses and flows forward.

That is, the ventilation duct 200 may direct the cooling airflow blown by the blower 104 to accelerate out of the compressor compartment 100, but cause the cooling airflow to have a velocity just exiting the compressor compartment 100 into the ventilation duct 200 that is greater than the velocity at which it would exit the ventilation duct 200. Specifically, the ventilation duct 200 is provided so that its cross-sectional area near the blower fan 104 is smaller than its cross-sectional area near the front end of the refrigerator-freezer 1, whereby the outflow and diffusion of the heat-dissipating airflow can be promoted, and the airflow at the bottom can be prevented from being perceived significantly by a user standing on the front side of the refrigerator-freezer 1.

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

Referring to fig. 1 and 5, in some embodiments of the invention, the refrigerated freezer 1 may further include a weather barrier 300. The wind barrier 300 may be disposed at a horizontal middle position of the bottom of the housing 10, and extend from the front portion of the bottom wall of the storage compartment to the rear end of the bottom of the housing 10 in the front-rear direction, so as to divide the bottom area of the housing 10 into left and right portions and prevent air in the two portions from directly exchanging air. Both the blower fan 104 and the ventilation duct 200 are integrally located on the same side of the wind deflector 300 in the lateral direction. It should be noted that the lateral middle position of the bottom of the housing 10 includes, but is not limited to, the middle position of the housing 10.

The cooling fan 102 may be arranged substantially directly behind the wind screen 300. The bottom condenser 103 may occupy the other side of the windscreen 300 in the lateral direction, thereby further reducing the likelihood of air bypassing the condenser and entering the cooling fan 102 by being guided through the windscreen 300.

In this embodiment, the wind-shielding partition 300 divides the space at the bottom of the refrigerating and freezing device 1, which is located at the front side of the compressor compartment 100, into two parts, which are a guide intake area for guiding air to at least part of the lateral opening 106 and a guide outtake area for guiding air flowing out from the compressor compartment 100 to the outside environment, respectively. Further, the air inlet guiding area and the air outlet guiding area are separated at the junction thereof only by the wind shielding partition plate 300, so that the heat dissipation airflow after heat exchange is prevented from flowing back to the side where the bottom condenser 103 is located. Due to the corresponding arrangement of the cooling fan 102 and the blower 104 inside the compressor compartment 100, the heat dissipation airflow can be continuously formed without arranging shielding or flow guiding structures on the peripheral sides of the air inlet guiding region and the air outlet guiding region, and the external structure of the refrigeration and freezing device 1 is simplified.

In some embodiments of the present invention, the wind deflector 300 may be made of a heat insulating material to prevent heat exchange between the heat dissipating air flows of different temperatures flowing on both sides of the wind deflector 300, which may affect the heat dissipating effect.

In some embodiments of the invention, the refrigerator-freezer 1 may have a temperature sensor that detects the ambient temperature. Further, the side condenser 105 may be configured to operate under control when the ambient temperature is less than or equal to a preset upper threshold to provide auxiliary heat rejection to the refrigeration system. Specifically, the upper threshold may be any temperature value between 30 ℃ and 40 ℃ to avoid problems such as excessive ambient temperature caused by long-time activation of the side condenser 105. The ambient temperature is the temperature of the air in the room in which the refrigeration-freezing apparatus 1 is located (typically, in the home of the user). Specifically, the temperature sensor may be provided in a hinge box of the refrigerator freezer 1 for opening and closing a door of the cabinet 10 to obtain a real-time ambient temperature, particularly an ambient temperature of an area close to the refrigerator freezer 1.

In some embodiments of the present invention, the refrigerating and freezing apparatus 1 has a free heat radiation mode and an embedded heat radiation mode, and can switch between the two heat radiation modes depending on the position where it is disposed. In particular, when the refrigerating and freezing device 1 is operated by itselfIn the heat dissipation mode, the side condenser 105 is at the ambient temperature less than or equal to the preset first upper threshold T₁The operation is controlled. When the refrigerator-freezer 1 is operating in the embedded heat dissipation mode, the side condenser 105 is less than or equal to a preset second upper threshold T at the ambient temperature₂The operation is controlled. In particular, a first upper threshold T₁Less than a second upper threshold T₂. That is, the first upper threshold value T₁And may be any value between 30 ℃ and 35 ℃. Second upper threshold T₂And may be any value between 36 ℃ and 40 ℃.

Since the space on the peripheral side allows the user to contact the side wall of the box 10 when the refrigerator-freezer 1 is in the free standing installation state, the first upper threshold value T is set₁The temperature of the side face of the box body 10 is ensured to be always in a safe range by being at least lower than the temperature of a human body, so that the user is ensured not to feel discomfort due to high temperature when the user is around the refrigeration and freezing device 1 and is in contact with the box body 10, and the use comfort of the user is improved. Furthermore, when the refrigerator-freezer 1 is in an embedded installation state, the overheated side temperatures also affect the heating of the wall or closet in which it is embedded, causing the wall or closet to discolor or deform. Accordingly, a safety temperature, i.e. a second upper threshold value T, is also set accordingly₂. The embedded mounting position makes the influence of the side wall temperature of the refrigeration and freezing device 1 on the ambient temperature less, so the second upper threshold value T₂May be correspondingly higher than the first upper temperature threshold T₁。

In some embodiments of the present invention, the refrigerator freezer 1 may further comprise at least three distance sensors 400. Specifically, referring to fig. 2 and 3, three distance sensors 400 may be respectively disposed at left, right, and rear sides of the cabinet 10 to respectively detect distances between the refrigerating and freezing apparatus 1 and walls and/or cabinets located at both sides and rear sides thereof. Specifically, one side distance sensor 400 may be installed at a position close to the door of the refrigerating and freezing device 1, for example, near the hinge box of the door body. Another side distance sensor 400 may be disposed at a lower portion of the side plate, for example, near the compressor bin 100. The rear distance sensor 400 may be mounted near the center of the back panel of the cabinet 10 of the refrigerator/freezer 1.

In some embodiments of the present invention, when the distance between the refrigerating and freezing device 1 and the wall and/or the cabinet at the two sides thereof is less than or equal to the first distance D₁And the distance between the refrigerating and freezing device 1 and the wall body and/or the cabinet body at the rear side thereof is less than or equal to a second distance D₂At this time, 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 wall bodies and/or the cabinet bodies positioned at the two sides of the refrigerating and freezing device is larger than the first distance D₁Or the distance between the refrigerating and freezing device 1 and the wall body and/or the cabinet body at the rear side thereof is larger than the second distance D₂At this time, the refrigerating and freezing apparatus 1 operates in the free heat radiation mode.

That is, only when both sides and the rear portion have a shield, the refrigerating and freezing device 1 is determined to be in the embedded state and performs heat radiation in the embedded heat radiation mode. When a certain side or back of the refrigerating and freezing device 1 is far enough away from the wall or cabinet, it can be regarded as being in a free standing mode and heat is dissipated in a free heat dissipation mode. Therefore, the influence of long-term operation of the side condenser 105 on the environmental temperature is reduced, and the possibility that the temperature of the box body 10 is too high and discomfort is caused when a user takes and places articles or moves the refrigerator-freezer 1 is avoided.

In particular, the first distance D₁May be any value between 8mm and 12mm, for example 8mm, 9mm, 10mm, 11mm or 12mm, etc. Second distance D₂May be any value between 12mm and 17mm, for example 12mm, 13mm, 14mm, 15mm, 16mm or 17mm, etc. In some preferred embodiments of the invention, the first distance D₁Can be set to 10mm, the second distance D₂Can accordingly be set to be greater than the first distance D₁15 mm. That is, the size of the space on the side of the refrigerating and freezing apparatus 1 is preferably considered to ensure that the temperature of the side condenser 105 does not affect the comfort of the user.

In other embodiments of the present invention, the heat dissipation mode of the refrigeration and freezing apparatus 1 may be selected by the user through the control input after the refrigeration and freezing apparatus 1 is completely installed.

The control method for the refrigeration and freezing device is suitable for controlling the refrigeration and freezing device to ventilate and radiate heat in different running states through a proper ventilation and heat radiation mode, and the control method can comprise start-stop control of the blower 104 and the side condenser 105 and adjustment of the working state of the variable-frequency compressor 101.

Specifically, the control method includes 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 threshold, starting the side condenser 105 to perform auxiliary heat dissipation on the refrigeration system. That is, the bottom condenser 103 can be synchronously connected to dissipate heat when the inverter compressor 101 is started. The side condenser is controlled to be started according to the environment temperature of the environment where the refrigerating and freezing device is located, so that auxiliary heat dissipation is carried out only when necessary, and the stable operation of the refrigerating system is ensured.

In addition, the control method further comprises setting a limit temperature difference of the bottom condenser 103, and acquiring the temperature of the bottom condenser and judging whether the temperature is higher than the ambient temperature by the limit temperature difference. In particular, the limit temperature difference refers to a certain relatively high temperature difference above ambient temperature that the bottom condenser 103 can withstand during operational operation. When the temperature of the bottom condenser is continuously higher than the ambient temperature within a preset limit duration to reach a limit temperature difference, the bottom condenser is in an abnormal high-temperature state at the moment, the heat exchange pressure is high, and the side condenser 105 can be forcibly started at the moment to perform auxiliary heat dissipation on the refrigeration system, so that the stable operation of the bottom condenser 103 is ensured.

That is, the side condenser 105 can be started up in two cases under the control of the control method of the present invention. When the ambient temperature is low, the operation of the side condenser 105 is started to effectively reduce the heat exchange pressure of the bottom condenser 103, and the ambient temperature is not too high. Secondly, when the ambient temperature is already high, the side condenser 105 is generally not started to operate, but when the bottom condenser 103 is also high, the side condenser 105 can be controlled to start to operate, thereby ensuring the stable operation of the refrigeration system.

The control method of the invention enables the side condenser 105 to provide an additional auxiliary heat dissipation path for the refrigeration system if necessary, so that the refrigeration and freezing device 1 realizes the heat dissipation of the side condenser 105 and the bottom condenser 103 at the same time, thereby further improving the heat exchange efficiency of the heat exchange system of the refrigeration and freezing device 1, and the control method of the invention also has a guarantee mechanism for the bottom condenser 104 and the whole refrigeration system, and can start the side condenser 105 in time under the condition of abnormal high temperature of the bottom condenser 103 to avoid the overload of the refrigeration system.

In some embodiments of the present invention, the control method further includes setting a reference current of the inverter compressor 101 and obtaining an instantaneous current when the inverter compressor 101 is operated. Further, when the instantaneous current exceeds the reference current and reaches a preset current early warning threshold value, the rotating speed of the variable-frequency compressor 101 is reduced.

That is, when the heat exchange pressure of the condenser, especially the bottom condenser 103, is too high, the working current of the inverter compressor 101 is affected and increased accordingly, which may bring a safety hazard to the operation of the whole refrigeration system. The control method of the invention ensures the normal and stable operation of the variable frequency compressor by setting the current early warning threshold value, and prevents the overload of the refrigeration system. In addition, since the rotation speed of the inverter compressor 101 is adjusted to be low, the heat exchange pressure of the bottom condenser is reduced, and the working time of the side condenser 105 is shortened, so that the influence on the ambient temperature and the possibility of discomfort caused by the contact of a user with the side wall of the refrigeration and freezing device are reduced.

It should be noted that the upper threshold for determining the start-up operation condition of the side condenser may include a plurality of unequal first upper threshold, second upper threshold, etc., and the plurality of values may be respectively applied to the control methods when the refrigeration and freezing apparatus is in different heat dissipation modes, which will be described in more detail later.

Referring to fig. 7, the control method may include a determination of a triggering condition for whether the refrigeration freezer requires use of an air blower. Specifically, the following steps may be included:

and step S200, starting refrigeration by the refrigeration and freezing device, and operating in any heat dissipation mode.

And S202, controlling the compressor and the bottom condenser to start and operate, and controlling the cooling fan to start and operate.

Step S210, judging whether the temperature of the bottom condenser is higher than the ambient temperature by a first difference value delta T₁(ii) a If yes, go to step S212; if not, the process returns to step S202.

And step S212, controlling the blower to start running.

Step S214, determining whether the temperature of the bottom condenser is reduced to be less than a second difference value delta T with the ambient temperature₂(ii) a If yes, go to step S216; if not, the process returns to step S212.

The start operation in step S212 also includes a maintenance operation when the blower is already in an operating state. The blower may be configured to only when the temperature of the bottom condenser is greater than the ambient temperature by a preset first difference Δ T₁And when the compressor is started, the compressor is controlled to dissipate heat forcibly. The bottom condenser at this moment can not effectively dissipate heat only under the action of the cooling fan, and the starting of the air blower can effectively promote high-temperature air to flow out of the compressor bin at an accelerated speed, so that the frequency conversion compressor or the condenser is prevented from being broken down due to overhigh temperature.

Further, when the heat exchange efficiency of the refrigerating system meets the requirement of a refrigerating effect required by a refrigerating and freezing device and the temperature in the compressor bin is relatively low, the air blower can be not started, and only the cooling fan is used for radiating the bottom condenser, so that the energy consumption is saved, and the noise is reduced. Further, the second difference value Δ T for judging the blower off condition₂Can compare and judge the first difference value delta T of the opening₁Slightly lower by 2 ℃ to 4 ℃ to avoid the repeated opening and closing of the blower.

Referring to fig. 8, the control method can also control the blower to be started in advance to enhance the ventilation and heat dissipation effects on the refrigeration and freezing device. Specifically, the following steps may be included:

step S300, a refrigerating system of the refrigerating and freezing device is started, and a forced heat dissipation function is started.

Step S302, the compressor is started.

Step S304, judging whether the compressor runs for a first starting time; if yes, go to step S306; if not, the process returns to step S302.

And step S306, starting the cooling fan.

Step S308, judging whether the cooling fan operates for a second starting time; if yes, go to step S310; if not, the process returns to step S306.

In step S310, the blower is started.

If the compressor or the cooling fan is already in the start-up operation state, step S302 and step S306 may also include maintaining the operation state accordingly. Further, the first start time and the second start time may be any value between 1min and 3 min. For example, 1min, 2min, or 3min, etc. The first start-up time and the second start-up time may be the same or different.

Therefore, the air blower can be controlled to start along with the refrigerating system of the refrigerating and freezing device so as to perform forced ventilation and heat dissipation for the compressor bin in time. Under the condition, the compressor and the cooling fan blower can be configured to be started in sequence in a delayed mode, so that on the premise that the ventilation and heat dissipation effects are guaranteed, meaningless operation is avoided, and energy consumption and noise are reduced.

In addition, referring to fig. 9, when the refrigeration and freezing device stops cooling, the blower fan can also be stopped accordingly, so as to reduce energy consumption. Specifically, the following steps may be included:

step S400, the refrigeration system is turned off.

And step S402, controlling the compressor to stop running.

Step S404, judging whether the compressor is stopped for a first stop time; if yes, go to step S406; if not, the process returns to step S402.

And step S406, controlling the blower to stop running.

Step S408, judging whether the blower is stopped for a second stop time; if yes, go to step S410; if not, the process returns to step S406.

And step S410, controlling the cooling fan to stop running.

Wherein, if the compressor or the blower is already in the shutdown state, the steps S402 and S406 may also correspondingly include maintaining the shutdown state. Further, the first stop time and the second stop time may be any value between 0.2min and 0.6 min. 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 before blowing for a short time. The cooling fan may be stopped after the blower is stopped for a short time. Because the transverse opening transversely penetrating through the compressor bin is arranged, heat (hot air) generated by the variable frequency compressor or the bottom condenser easily flows out of the compressor bin. And then when the inverter compressor shut down the back, the heat that produces in the compressor storehouse is limited, only makes the interior air flow of compressor storehouse can satisfy the heat dissipation requirement through the cooling blower of horizontal blowing, and the air that is blown can directly distribute from horizontal export and flow out. Therefore, the heat dissipation requirement of the compressor bin at the moment can be met without continuously operating a blower which is approximately vertical to the transverse outlet and supplies air outwards.

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

Referring to fig. 10, the control method may include a determination of an installation location of the refrigeration freezer. Specifically, the following steps may be included:

step S100, starting the refrigeration and freezing device.

Step S106, controlling a rear distance sensor to detect whether the distance between the refrigerating and freezing device and the rear shelter is smaller than a second distance; if yes, go to step S108; if not, go to step S112.

Step S108, controlling the distance sensors at the two sides to detect whether the distances between the refrigerating and freezing device and the shelters at the left and right sides are both smaller than a first distance; if yes, go to step S110; if not, go to step S112.

And step S110, controlling the refrigerating and freezing device to enter an embedded heat dissipation mode.

And step S112, controlling the refrigerating and freezing device to enter a free heat dissipation mode.

In particular, the first distance D₁Can be any value between 8mm and 12mm, the second distance D₂May be greater than the first distance D₁Any value between 12mm and 17 mm.

That is, when the refrigerating and freezing device is started for the first time or restarted after each power failure, whether the shielding exists on the rear side and the two sides of the refrigerating and freezing device is detected to confirm the heat dissipation mode which the refrigerating and freezing device should operate.

The control method can ensure that the cold storage and freezing device is judged to be in the embedded state only when both sides and the rear part of the cold storage and freezing device are shielded, and heat is radiated in an embedded heat radiation mode. When the distance between one side or back of the refrigeration and freezing device and the wall or the cabinet is far enough, the refrigeration and freezing device can be regarded as being in a free standing mode and can radiate heat in a free heat radiation mode. Therefore, the influence of long-term operation of the side condenser on the environmental temperature is reduced, and the possibility that a user feels uncomfortable due to overhigh temperature of the box body when taking and placing articles or moving the side condenser to touch the refrigerating and freezing device is eliminated.

Referring to fig. 11, the control method may further include the following steps before step S106:

step S102, keeping the refrigeration and freezing device continuously running in a current heat dissipation mode;

step S104, judging whether the distance detection is carried out for 24 hours from the last time; if yes, go to step S106; if not, the process returns to continue to step S102.

That is, the refrigerator-freezer is detected every 24 hours to determine whether there is a shield on both sides and the rear portion. Therefore, the plurality of distance detection sensors do not need to work continuously, energy consumption is saved, and the service life of the distance detection sensors is prolonged.

Referring to fig. 12, when the refrigeration freezer is in the embedded heat dissipation mode, the control method may include:

in step S200, the refrigeration and freezing apparatus starts cooling and operates in the embedded heat dissipation mode.

And S202, controlling the variable frequency compressor and the bottom condenser to start and operate, and controlling the cooling fan to start and operate.

Step S204, judging whether the environmental temperature is less than a second upper limit threshold value T₂(ii) a If yes, go to step S206; if not, go to step S208.

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

In step S208, the side condenser is stopped.

Step S210, judging whether the temperature of the bottom condenser is higher than the ambient temperature by a first difference value; if yes, go to step S212; if not, the process returns to step S202.

And step S212, controlling the blower to start running.

Step S214, judging whether the temperature of the bottom condenser is reduced to be smaller than a second difference value with the ambient temperature; if yes, go to step S216; if not, the process returns to step S212.

And step S216, controlling the blower to stop running.

In particular, the second upper threshold T₂And may be any value between 36 ℃ and 40 ℃. For example, 36 ℃, 37 ℃, 38 ℃, 39 ℃ or 40 ℃. Thus, when the refrigerator-freezer is in an in-line installation condition, the overheating side temperatures can affect the heating of the wall or closet in which it is embedded, causing the wall or closet to discolor or deform. By setting the second upper threshold as a safe temperature, excessive temperatures of the outer surface of the refrigerator-freezer where the side portion is in contact with the wall or the closet are avoided. Preferably, the second upper threshold T₂And can be set to 40 ℃ to obtain the best heat dissipation effect.

When the refrigerator-freezer is in the free-cooling mode, step S200 in the flowchart of the control method shown in fig. 12 may be replaced with step S201, and step S204 may be replaced with step S205. The method comprises the following steps: in step S201, the refrigeration and freezing apparatus starts cooling and operates in a free heat dissipation mode. Step S205, judging whether the environmental temperature is less than the first upper limit threshold value T₁(ii) a If yes, go to step S206; if not, go to step S208.

First upper part for judging whether temperature is too high in free heat radiation modeThreshold limit value T₁And may be any value between 30 ℃ and 35 ℃. Preferably, the first upper threshold T₁The temperature can be set to be 33 ℃ so as to ensure that a user does not feel uncomfortable due to high temperature when the user is around the refrigeration and freezing device and is in contact with the box body, and the use comfort of the user is improved.

Fig. 13 is a schematic flow chart of a control method for operating a refrigeration chiller in an embedded heat rejection mode according to another embodiment of the present invention. The method specifically comprises the following steps:

Step S204, judging whether the ambient temperature is less than a second upper limit threshold value; if yes, go to step S206; if not, go to step S208.

In step S208, the side condenser is stopped.

And step S212, controlling the blower to start running.

Step S213, determining whether the bottom condenser temperature is higher than the ambient temperature by a third difference Δ T₃(ii) a If yes, go to step S214; if not, step S2130 is executed.

Step S2130, judging the temperature of the bottom condenser within a preset limit time t_maxWhether or not it continues to be higher than ambient temperature by a third difference Δ T₃(ii) a If yes, go to step S2132; if not, returning to execute the step S212;

step S2132, starting or keeping the side condenser running to perform auxiliary heat dissipation.

Step 2134, judging whether the instant current exceeds the reference current to reach a preset current early warning threshold value delta I; if yes, go to step S2136; if not, the process returns to step S212.

And step 2136, reducing the rotating speed of the variable frequency compressor.

And step S216, controlling the blower to stop running.

The current warning threshold Δ I in step S2134 may be set to any value between 5% and 15% of the reference current, for example, may be 10% of the reference current. That is, for example, if the current warning threshold Δ I is 10% of the reference current, the rotation speed of the inverter compressor is reduced when the instantaneous current reaches 110% of the reference current. In addition, step S2134 may be executed after step S216, that is, after the blower stops operating, the instant current of the inverter compressor may be continuously detected and the difference between the instant current and the reference current may be determined, so as to avoid the problem that the bottom condenser may exchange heat normally but the inverter compressor is overloaded.

In some embodiments of the present invention, the control method may further include adjusting the rotation speed of the compressor to a default rotation speed when the instantaneous current is less than or equal to the reference current or exceeds the reference current insufficient current warning threshold, so as to enhance the cooling effect of the refrigeration and freezing apparatus. The default speed may be the speed of the compressor that is varied in frequency to achieve the best refrigeration effect, either on the refrigeration system of the refrigeration chiller or selected by a user setting.

The limit time period t in the above step S213_maxMay be set according to the ambient temperature, etc. In particular, the limit duration may be any value between 10 minutes and 30 minutes, for example 20 minutes, in order to avoid that the bottom condenser is only briefly subjected to a temperature change, i.e. has a major effect on the refrigeration system. Third difference Δ T₃Is a limit temperature difference greater than the first difference. Specifically, the third difference Δ T₃And may be a temperature value greater than or equal to 13 c. Preferably, the third difference may be 15 ℃. That is, in order to avoid the poor heat dissipation effect caused by the shielding around the refrigerating and freezing device when the refrigerating and freezing device is operated in the embedded heat dissipation mode, the heat dissipation effect is not goodAnd the problem that the temperature of the bottom condenser is too high is caused, the control method in this embodiment detects whether the temperature of the bottom condenser is too high by setting a limit temperature difference, that is, a third difference. Therefore, when the temperature of the bottom condenser is too high (the temperature of the bottom condenser is higher than the ambient temperature by the third difference value), the side condenser is forced to operate no matter what the ambient temperature is, so as to ensure the safe operation of the refrigerating system.

In some embodiments of the present invention, when the refrigeration freezer is operating in the free-cooling mode, step S200 in the flowchart of the control method shown in fig. 13 may be replaced with step S201, and step S204 may be replaced with step S205. That is, in order to avoid discomfort from the user's contact with the side wall of the refrigerator freezer, the temperature threshold value in the trigger condition for the activation of the side condenser in the free heat radiation mode is the first upper threshold value which is slightly lower than the second upper threshold value, and other steps of the control method in the free heat radiation mode are the same as those of the control method in the embedded heat radiation mode.

Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been illustrated and described in detail herein, many other variations or modifications consistent with the principles of the invention may be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the invention. Accordingly, the scope of the invention should be understood and interpreted to cover all such other variations or modifications.

Claims

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 an air blower, a variable frequency compressor and a bottom condenser communicated with the variable frequency compressor so as 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 temperature of the bottom condenser and the ambient temperature of the environment where the refrigeration and freezing device is located;

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

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

setting a limit temperature difference of the bottom condenser, and judging whether the temperature of the bottom condenser is higher than the ambient temperature by the limit temperature difference or not after the blower is started; and

and when the temperature of the bottom condenser is continuously higher than the ambient temperature within a preset limit duration to reach the limit temperature difference, the side condenser is started or kept running so as to perform auxiliary heat dissipation on the refrigeration system.

2. The control method according to claim 1, further comprising:

3. The control method of claim 1, wherein the refrigeration freezer has a free heat dissipation mode and an embedded heat dissipation mode;

the control method comprises the following steps:

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

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

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

6. The control method according to claim 2, wherein,

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

the control method further comprises the following steps:

7. The control method according to claim 1,

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

8. The control method according to claim 6, further comprising:

9. The control method according to claim 6, further comprising:

10. The control method of claim 7, the refrigeration freezer further comprising: