Refrigerator having a door air outlet adjustment function and control method thereof

Abstract

The application discloses a refrigeration cabinet with a gate-controlled air outlet adjusting function and a control method thereof, and relates to the technical field of refrigeration cabinets. The refrigeration cabinet comprises a cabinet body and a control system for controlling the operation of the refrigeration cabinet. An inner wall at the top of the cabinet body is provided with an inner fan for promoting air circulation in the cabinet. The inner wall of the cabinet body is provided with a cold air outlet on the side facing the cabinet door. The cold air outlets in the horizontal direction are arranged at intervals along the inner wall of the cabinet body. The control system comprises a door state detection module, a cold air outlet speed adjusting module and an inner fan rotating speed adjusting module. The door state detection module is used for detecting the opening angle of the cabinet door and generating an opening angle signal of the cabinet door. The cold air outlet speed adjusting module is used for increasing the air outlet speed of the cold air outlet according to the increase of the opening angle of the cabinet door. The inner fan rotating speed adjusting module is used for reducing the rotating speed of the inner fan according to the increase of the opening angle of the cabinet door. The application is helpful to realize the relative stability of the air pressure and temperature in the cabinet.

Description

Technical Field

[0001] This invention relates to the field of refrigeration equipment technology, specifically to a refrigeration cabinet with door-controlled airflow adjustment function and its control method. Background Technology

[0002] Display cases and refrigerated cabinets, widely used in shopping malls, supermarkets, and other commercial venues, primarily function to maintain a low temperature inside the cabinet while displaying goods. Refrigerated cabinets typically rely on internal fans to drive air circulation, ensuring even distribution of cooling.

[0003] A document titled "A Method for Controlling an Air Curtain in a Refrigerated Display Case" (Document No. CN201911410977.X) discloses a refrigerator comprising a cabinet body and a door. A first air supply device is installed at the first end of the cabinet body near the door opening, and a first return air device is installed at the second end of the cabinet body near the door opening, opposite to the first end. The air curtain control method includes: in a horizontal air-cooled refrigerator, a first air supply device is installed at one end of the cabinet body near the door opening, and a first return air device is installed at the opposite door opening. When the door is detected to be open, the control system maintains or starts the evaporator fan, while simultaneously preventing the compressor from starting or reducing its frequency. In this way, the cold air blown out by the air supply device is drawn back by the return air device at the door opening, forming a circulating cold air curtain that effectively prevents external hot air from entering the refrigerator. However, if the internal fan continues to operate at normal power after the door is opened, hot air from outside the cabinet will still be drawn into the refrigerator, increasing the temperature inside the refrigerator and affecting the preservation effect of the goods. Summary of the Invention

[0004] This invention provides a refrigeration cabinet with door-controlled airflow adjustment function and its control method. By sensing the degree of opening of the cabinet door, the airflow intensity of the air curtain and the operating status of the internal fan are adjusted accordingly, so as to minimize the loss of cold air and maintain the relative stability of air pressure and temperature inside the cabinet.

[0005] This invention provides the following technical solution: a refrigeration cabinet with door-controlled air outlet adjustment function, comprising a cabinet body and a control system for controlling the operation of the refrigeration cabinet. An internal fan for promoting air circulation within the cabinet body is installed on the top inner wall of the cabinet body. A cold air outlet is provided on the side of the cabinet body facing the door, and horizontal cold air outlets are arranged at intervals along the inner wall of the cabinet body. The control system includes a door status detection module, a cold air outlet speed adjustment module, and an internal fan speed adjustment module. The door status detection module detects the opening angle of the cabinet door and generates an opening angle signal. The cold air outlet speed adjustment module increases the air outlet speed according to the increase in the cabinet door opening angle. The internal fan speed adjustment module decreases the internal fan speed according to the increase in the cabinet door opening angle.

[0006] As a further improvement of the present invention, the control system further includes an internal fan suction angle adjustment module, which is used to adjust the suction range of the internal fan according to the change of the cabinet door opening angle signal.

[0007] As a further improvement of the present invention, the air outlets are arranged in multiple rows at intervals, and each row of air outlets includes multiple air outlets arranged at intervals.

[0008] As a further improvement of the present invention, the cabinet is also equipped with a pressure monitoring module for monitoring the internal pressure of the cabinet. The air outlet speed adjustment module and the internal fan speed adjustment module dynamically adjust the air outlet speed of the air conditioner and the speed of the internal fan based on the pressure value fed back by the pressure monitoring module, so as to maintain the internal pressure of the cabinet within a preset positive pressure range.

[0009] As a further improvement of the present invention, the internal fan is provided with a drive mechanism for driving the internal fan to swing.

[0010] A control method for a refrigeration cabinet with door-controlled air outlet adjustment function, applicable to the aforementioned refrigeration cabinet, comprising the following steps:

[0011] S1. The door status detection module detects the opening angle of the cabinet door and generates the opening angle signal of the cabinet door;

[0012] S2. The air outlet speed adjustment module increases the air outlet speed of the air conditioner according to the increase of the cabinet door opening angle;

[0013] S3. The internal fan speed adjustment module reduces the speed of the internal fan according to the increase of the cabinet door opening angle.

[0014] As a further improvement of the present invention, the leftmost column of air vents of the cabinet is designated as the first column, and the rightmost column of air vents of the cabinet is designated as the nth column (n≥2), with n increasing sequentially from left to right; when the cabinet door is opened, the air vent speed adjustment module first increases the air vent speed of the first column of air vents, and as the opening angle of the cabinet door increases, the air vent speed adjustment module sequentially increases the air vent speed of the nth column of air vents.

[0015] As a further improvement to the present invention, the method further includes the following steps:

[0016] S4. The internal fan suction angle adjustment module adjusts the suction range of the internal fan according to the change of the cabinet door opening angle signal.

[0017] As a further improvement of the present invention, the indoor fan speed adjustment module adjusts the speed of the indoor fan, and the air outlet speed adjustment module adjusts the air outlet speed of the air conditioner, specifically including:

[0018] When the cabinet door is closed, the internal fan speed adjustment module sets the speed of the internal fan to the first preset speed, and the cold air outlet speed adjustment module sets the outlet speed of each cold air outlet to the first preset speed.

[0019] When the cabinet door rotates from the closed state to the open state, the internal fan speed adjustment module gradually reduces the speed of the internal fan according to the opening angle signal of the cabinet door; at the same time, the air outlet speed adjustment module gradually increases the air outlet speed of each row of air outlets according to the opening angle signal of the cabinet door.

[0020] When the cabinet door is opened to a preset angle threshold, the internal fan speed adjustment module reduces the speed of the internal fan to a second preset speed, which is lower than the first preset speed; at the same time, the cold air outlet speed adjustment module increases the outlet speed of each row of cold air outlets to a second preset speed, which is higher than the first preset speed.

[0021] As a further improvement of the present invention, the volume of cold air ejected from the cold air outlet is greater than the volume of gas drawn from the cabinet by the internal fan within the same time period.

[0022] The present invention has the following beneficial effects:

[0023] 1. By sensing the opening angle of the cabinet door in real time and adjusting the air outlet speed and the internal fan speed in conjunction, the dynamic matching of air curtain obstruction and opening size is achieved, which helps to maintain the relative stability of temperature and pressure inside the cabinet.

[0024] 2. By ensuring that the increase in airflow exceeds the decrease in airflow, and through optional pressure monitoring, the system can actively maintain or mitigate the loss of positive pressure inside the cabinet when the door is open. A positive pressure environment is the most effective physical mechanism to prevent the infiltration of outside air, fundamentally enhancing the insulation effect. Automated adjustment requires no manual intervention, reducing the workload of staff. At the same time, maintaining stable pressure also helps protect the refrigeration system and reduces equipment wear caused by frequent temperature and pressure fluctuations. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the cabinet in this invention.

[0026] Figure 2 This is a physical comparison image of the cabinet in this invention.

[0027] Figure 3 This is a schematic diagram of the internal structure of the cabinet in this invention.

[0028] Figure 4 This is a physical comparison diagram of the internal structure of the cabinet in this invention.

[0029] Figure 5 This is a flowchart of the control method for the refrigeration cabinet in this invention.

[0030] In the diagram: 10. Cabinet body; 11. Cabinet door; 12. Air conditioning vent; 20. Internal fan. Detailed Implementation

[0031] The technical solutions of the embodiments of this specification will be explained and described below with reference to the accompanying drawings. However, the following embodiments are only preferred embodiments of this specification and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments in the implementation methods without creative effort are all within the protection scope of this specification.

[0032] The terms "first," "second," "third," etc., in the description, claims, and accompanying drawings are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to such processes, methods, products, or apparatus.

[0033] In the following description, terms such as “inner,” “outer,” “upper,” “lower,” “left,” and “right” are used only to facilitate the description of the embodiments and to simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this specification.

[0034] All data involved in this application are information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of the relevant data comply with the relevant laws, regulations and standards of the relevant countries and regions.

[0035] For ease of description, the left side of the operator is referred to as "left" and the right side of the operator is referred to as "right" when the operator is facing the refrigeration cabinet.

[0036] Example 1

[0037] Please see Figures 1-4As shown, a refrigeration cabinet with door-controlled airflow adjustment function includes a cabinet body 10 and a control system for controlling the operation of the refrigeration cabinet. An internal fan 20 for promoting air circulation within the cabinet body 10 is installed on the top inner wall. A cold air outlet 12 is provided on the side of the inner wall of the cabinet body 10 facing the cabinet door 11, and horizontally spaced cold air outlets 12 are arranged along the inner wall of the cabinet body 10. The control system includes a door status detection module, a cold air outlet speed adjustment module, and an internal fan speed adjustment module. The door status detection module detects the opening angle of the cabinet door 11 and generates an opening angle signal for the cabinet door 11. The cold air outlet speed adjustment module increases the airflow speed of the cold air outlet 12 according to the increase in the opening angle of the cabinet door 11. The internal fan speed adjustment module decreases the speed of the internal fan 20 according to the increase in the opening angle of the cabinet door 11.

[0038] In the above scheme, the horizontal air outlets 12 are arranged at intervals along the rear inner wall of the cabinet 10. This discrete, array-like outlet layout provides a physical basis for precise local airflow control, and the cold air ejected from the rear inner wall of the cabinet 10 will also form an air curtain. The door status detection module can be implemented by setting an angle sensor or door magnetic sensor at the hinge. In the air outlet speed adjustment module, the larger the opening angle of the cabinet door 11, the more of the cabinet 10 is exposed to the outside. To avoid a sharp drop in temperature, the air outlet speed of the air outlets 12 at different positions needs to be increased to increase the internal pressure of the cabinet 10 and prevent external hot air from being drawn into the cabinet. In the internal fan speed adjustment module, its control logic is coordinated with the air outlet speed adjustment, and the speed of the internal fan 20 is reduced according to the increase of the opening angle of the cabinet door 11. This is because when the cabinet door 11 is opened, if the internal fan 20 runs at high speed, it will intensify the flow of air from inside the cabinet to the door, which is not conducive to maintaining the pressure inside the cabinet. Reducing the speed of the internal fan 20 helps to reduce its interference with the pressure inside the cabinet.

[0039] The control system also includes an internal fan suction angle adjustment module, which adjusts the suction range of the internal fan 20 according to the change in the opening angle signal of the cabinet door 11. The internal fan 20 is equipped with a drive mechanism for swinging. For example, the drive mechanism causes the internal fan 20 to swing horizontally, so that its suction port faces further away from the cabinet door 11.

[0040] The air outlets 12 are arranged in multiple rows at intervals, and each row of air outlets 12 includes multiple air outlets 12 arranged at intervals. This matrix layout with multiple rows and holes allows the control system to perform more precise regional control.

[0041] The cabinet 10 is also equipped with a pressure monitoring module for monitoring the internal pressure. The air outlet speed adjustment module and the internal fan speed adjustment module dynamically adjust the air outlet speed of the air conditioner 12 and the speed of the internal fan 20 based on the pressure value fed back by the pressure monitoring module, respectively, to maintain the internal pressure within a preset positive pressure range. The pressure monitoring module mainly consists of pressure sensors located inside the cabinet 10. Maintaining positive pressure effectively resists the infiltration of external hot air and is an important means of enhancing insulation performance.

[0042] Example 2

[0043] Please see Figure 5 As shown, a control method for a refrigeration cabinet with door-controlled airflow adjustment function, applicable to the aforementioned refrigeration cabinet, includes the following steps:

[0044] S1. The door status detection module detects the opening angle of the cabinet door 11 and generates the opening angle signal of the cabinet door 11.

[0045] S2. The air outlet speed adjustment module increases the air outlet speed of the air conditioner 12 according to the increase of the opening angle of the cabinet door 11.

[0046] S3. The internal fan speed adjustment module reduces the speed of the internal fan 20 according to the increase of the opening angle of the cabinet door 11.

[0047] S4. The internal fan suction angle adjustment module adjusts the suction range of the internal fan 20 according to the change of the cabinet door 11 opening angle signal.

[0048] Specifically, the leftmost column of air vents 12 in cabinet 10 is designated as the first column, and the rightmost column of air vents 12 in cabinet 10 is designated as the nth column (n≥2), with n increasing sequentially from left to right. When cabinet door 11 is opened, the airflow speed adjustment module first increases the airflow speed of the first column of air vents 12. As the opening angle of cabinet door 11 increases, the airflow speed adjustment module sequentially increases the airflow speed of the nth column of air vents 12. This "follow-up" activation strategy enables the enhanced area of ​​the air curtain to dynamically match the physical opening area formed by the opening of the cabinet door, achieving more precise and energy-efficient barrier protection.

[0049] The indoor fan speed adjustment module adjusts the speed of the indoor fan 20, and the air outlet speed adjustment module adjusts the air outlet speed of the air conditioner vent 12, specifically including:

[0050] When the cabinet door 11 is closed, the internal fan speed adjustment module sets the speed of the internal fan 20 to the first preset speed, and the cold air outlet speed adjustment module sets the outlet speed of each row of cold air outlets 12 to the first preset speed.

[0051] When the cabinet door 11 rotates from the closed state to the open state, the internal fan speed adjustment module gradually reduces the speed of the internal fan 20 according to the opening angle signal of the cabinet door 11; at the same time, the cold air outlet speed adjustment module gradually increases the outlet speed of each row of cold air outlets 12 according to the opening angle signal of the cabinet door 11.

[0052] When the cabinet door 11 is opened to a preset angle threshold, the internal fan speed adjustment module reduces the speed of the internal fan 20 to a second preset speed, which is lower than the first preset speed; simultaneously, the air outlet speed adjustment module increases the air outlet speed of each row of air outlets 12 to a second preset speed, which is higher than the first preset speed. Preferably, the second preset speed is 0.

[0053] Within the same time frame, the volume of cold air ejected from the air outlet 12 is greater than the volume of air drawn from the cabinet by the internal fan 20. This means that during door opening, the increase in air volume inside the cabinet is greater than the decrease in air volume. In terms of total airflow, the increase in airflow from the outlet is greater than the decrease in airflow from the intake, which helps to replenish more air into the cabinet, thereby maintaining positive pressure inside the cabinet or slowing down the rate of decrease in positive pressure, fundamentally enhancing the ability to block external hot air.

[0054] In the above, the speed of the internal fan 20 is controlled by the first microcontroller, and the air outlet speed of the cold air outlet 12 is controlled by the second microcontroller.

[0055] The embodiments described above are merely preferred embodiments of this specification and are not intended to limit the scope of this specification. Any modifications and improvements made by those skilled in the art to the technical solutions of this specification without departing from the spirit of this specification should fall within the protection scope defined by the claims of this specification.

Claims

1. A refrigeration cabinet with door-controlled air outlet adjustment function, comprising a cabinet body (10) and a control system for controlling the operation of the refrigeration cabinet, wherein an internal fan (20) for promoting air circulation inside the cabinet is provided on the top inner wall of the cabinet body (10), and a cold air outlet (12) is provided on the side of the inner wall of the cabinet body (10) facing the cabinet door (11), characterized in that: The air vents (12) in the horizontal direction are arranged at intervals along the inner wall of the cabinet (10); the control system includes a door status detection module, an air vent speed adjustment module and an internal fan speed adjustment module; the door status detection module is used to detect the opening angle of the cabinet door (11) and generate the opening angle signal of the cabinet door (11); the air vent speed adjustment module is used to increase the air vent speed of the air vents (12) according to the increase of the opening angle of the cabinet door (11); the internal fan speed adjustment module is used to decrease the speed of the internal fan (20) according to the increase of the opening angle of the cabinet door (11).

2. The refrigeration cabinet with door-controlled air outlet adjustment function according to claim 1, characterized in that, The control system also includes an internal fan suction angle adjustment module, which is used to adjust the suction range of the internal fan (20) according to the change of the cabinet door (11) opening angle signal.

3. The refrigeration cabinet with door-controlled air outlet adjustment function according to claim 1 or 2, characterized in that, The air outlets (12) are arranged in multiple rows at intervals, and each row of air outlets (12) includes multiple air outlets (12) arranged at intervals.

4. The refrigeration cabinet with door-controlled air outlet adjustment function according to claim 2, characterized in that, The cabinet (10) is also equipped with a pressure monitoring module for monitoring the internal pressure of the cabinet (10). The air outlet speed adjustment module and the internal fan speed adjustment module dynamically adjust the air outlet speed of the air outlet (12) and the speed of the internal fan (20) respectively based on the pressure value fed back by the pressure monitoring module, so as to keep the pressure inside the cabinet within the preset positive pressure range.

5. The refrigeration cabinet with door-controlled air outlet adjustment function according to claim 2, characterized in that, The internal fan (20) is provided with a drive mechanism for driving the internal fan (20) to swing.

6. A control method for a refrigeration cabinet with door-controlled airflow adjustment function, the method being applicable to the refrigeration cabinet according to any one of claims 1-5, characterized in that, Includes the following steps: S1. The door status detection module detects the opening angle of the cabinet door (11) and generates the opening angle signal of the cabinet door (11); S2. The air outlet speed adjustment module increases the air outlet speed of the air outlet (12) according to the increase of the opening angle of the cabinet door (11); S3. The internal fan speed adjustment module reduces the speed of the internal fan (20) according to the increase of the opening angle of the cabinet door (11).

7. The control method for a refrigeration cabinet with door-controlled air outlet adjustment function according to claim 6, characterized in that, The leftmost column of air vents (12) of the cabinet (10) is designated as the first column, and the rightmost column of air vents (12) of the cabinet (10) is designated as the nth column (n≥2), with n increasing sequentially from left to right. When the cabinet door (11) is opened, the air vent speed adjustment module first increases the air vent speed of the first column of air vents (12). As the opening angle of the cabinet door (11) increases, the air vent speed adjustment module sequentially increases the air vent speed of the nth column of air vents (12).

8. The control method for a refrigeration cabinet with door-controlled air outlet adjustment function according to claim 6, characterized in that, It also includes the following steps: S4. The internal fan suction angle adjustment module adjusts the suction range of the internal fan (20) according to the change of the cabinet door (11) opening angle signal.

9. The control method for a refrigeration cabinet with door-controlled air outlet adjustment function according to claim 8, characterized in that, The indoor fan speed adjustment module adjusts the speed of the indoor fan (20), and the air outlet speed adjustment module adjusts the air outlet speed of the air conditioner (12), specifically including: When the cabinet door (11) is closed, the internal fan speed adjustment module sets the speed of the internal fan (20) to the first preset speed, and the cold air outlet speed adjustment module sets the outlet speed of each cold air outlet (12) to the first preset speed. When the cabinet door (11) rotates from the closed state to the open state, the internal fan speed adjustment module gradually reduces the speed of the internal fan (20) according to the opening angle signal of the cabinet door (11); at the same time, the cold air outlet speed adjustment module gradually increases the outlet speed of each row of cold air outlets (12) according to the opening angle signal of the cabinet door (11). When the cabinet door (11) is opened to a preset angle threshold, the internal fan speed adjustment module reduces the speed of the internal fan (20) to a second preset speed, which is lower than the first preset speed; at the same time, the cold air outlet speed adjustment module increases the outlet speed of each cold air outlet (12) to a second preset speed, which is higher than the first preset speed.

10. The control method for a refrigeration cabinet with door-controlled air outlet adjustment function according to claim 9, characterized in that, Within the same time period, the volume of cold air ejected from the air outlet (12) is greater than the volume of gas drawn from the cabinet by the internal fan (20).

Images