Refrigeration control method of a cold storage device and cold storage device

Abstract

The application discloses a refrigeration control method of a cold storage device and the cold storage device. The cold storage device comprises a compressor, a first chamber, a second chamber and a third chamber arranged from top to bottom and in different temperature zones, a first damper arranged between the first chamber and the second chamber, a second damper arranged between the second chamber and the third chamber, a first fan and a second fan arranged in the first chamber and the second chamber respectively. The control method comprises the following steps: detecting current temperature values of the first chamber, the second chamber and the third chamber; comparing the current temperature values with preset target temperature values of the chambers; controlling opening and closing of the compressor, the first damper and the second damper according to the comparison result, and adjusting working states of the first fan and the second fan until temperatures of the first chamber, the second chamber and the third chamber reach the target temperature. The technical problem that cold energy distribution of each temperature zone of a multi-temperature-zone cold storage device does not match the refrigeration demand of the temperature zone in the related art can be solved.

Description

Technical Field

[0001] This invention relates to the field of refrigeration technology, and in particular to a refrigeration control method and a cold storage device. Background Technology

[0002] In related technologies, cold storage equipment usually cannot meet the refrigeration control needs of a wide temperature range. Taking vertical freezers as an example, they are usually single compressor evaporator structures. This structure is mainly for pure freezing and cannot meet the needs of some differentiated users. For example, when users need a wide temperature range, they need to store ordinary frozen foods (such as pork and mutton stored at -18℃), cryogenic foods (such as deep-sea fish and shrimp stored at temperatures below -40℃), and foods that need to be consumed in a short time (such as pork and mutton stored at -5℃).

[0003] Traditional bottom-mounted evaporator structures often suffer from insufficient or excessive cooling capacity when controlling multiple different temperature zones for refrigeration. In order to achieve refrigeration in different freezing temperature zones, the compressor starts frequently, resulting in unreasonable distribution of cooling capacity, slow cooling speed, and high energy consumption.

[0004] Patent publication CN116499181A provides a refrigerator and a method for controlling the refrigeration temperature. However, this solution can only be used for refrigerators with both refrigeration and freezing compartments. For multi-temperature zone cold storage equipment with three or more temperature zones, such as upright freezers, this solution is not applicable.

[0005] Regarding the technical problem of mismatch between the distribution of cooling capacity in each temperature zone and the cooling demand of that temperature zone in multi-temperature zone cold storage equipment mentioned above, no effective solution has yet been proposed. Summary of the Invention

[0006] The purpose of this invention is to overcome the above-mentioned technical deficiencies and provide a refrigeration control method and a refrigeration storage device to solve the technical problem of mismatch between the distribution of cooling capacity in each temperature zone and the refrigeration demand of that temperature zone in multi-temperature zone refrigeration storage devices in related technologies.

[0007] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution:

[0008] According to one aspect of the present invention, a refrigeration control method for a cold storage device is provided, the cold storage device comprising a compressor, and a first compartment, a second compartment, and a third compartment arranged from top to bottom and located in different temperature zones, wherein a first damper is provided between the first compartment and the second compartment, a second damper is provided between the second compartment and the third compartment, and a first fan and a second fan are respectively provided in the first compartment and the second compartment; the control method includes:

[0009] Detect the current temperature values ​​of the first, second, and third chambers;

[0010] Compare the current temperature value with the preset target temperature value for each room;

[0011] Based on the comparison results, the compressor, the first damper, and the second damper are controlled to open and close, and the working states of the first fan and the second fan are adjusted until the temperatures of the first chamber, the second chamber, and the third chamber reach the target temperature.

[0012] Optionally, controlling the opening and closing of the compressor, the first damper, and the second damper based on the comparison result, and adjusting the operating states of the first fan and the second fan, specifically includes:

[0013] If the current temperature values ​​of the first, second, and third compartments are all less than or equal to their respective target temperature values, then the compressor, the first damper, the second damper, the first fan, and the second fan are all shut down.

[0014] Optionally, controlling the opening and closing of the compressor, the first damper, and the second damper based on the comparison result, and adjusting the operating states of the first fan and the second fan, specifically includes:

[0015] If the current temperature value of the first chamber is greater than its target temperature value, and the current temperature values ​​of the second and third chambers are both less than or equal to their respective target temperature values, then the compressor is controlled to start, the first damper is opened, the second damper is closed, and the speed of the first fan is increased while the speed of the second fan is decreased.

[0016] Optionally, controlling the opening and closing of the compressor, the first damper, and the second damper based on the comparison result, and adjusting the operating states of the first fan and the second fan, specifically includes:

[0017] If the current temperature value of the second chamber is greater than its target temperature value, and the current temperature values ​​of the first chamber and the third chamber are both less than or equal to their respective target temperature values, then the compressor is turned on, the first damper and the second damper are both closed, the first fan is turned off, and the speed of the second fan is increased.

[0018] Optionally, controlling the opening and closing of the compressor, the first damper, and the second damper based on the comparison result, and adjusting the operating states of the first fan and the second fan, specifically includes:

[0019] If the current temperature value of the third chamber is greater than its target temperature value, and the current temperature values ​​of the first and second chambers are both less than or equal to their respective target temperature values, then the compressor is controlled to start, the first damper is closed, the second damper is opened, the first fan is controlled to stop, and the speed of the second fan is increased.

[0020] Optionally, controlling the opening and closing of the compressor, the first damper, and the second damper based on the comparison result, and adjusting the operating states of the first fan and the second fan, specifically includes:

[0021] If the current temperature values ​​of the second and third chambers are both greater than their respective target temperature values, and the current temperature value of the first chamber is less than or equal to its target temperature value, then the compressor is controlled to start, the first damper is closed, the second damper is opened, the first fan is controlled to stop, and the speed of the second fan is increased.

[0022] Optionally, controlling the opening and closing of the compressor, the first damper, and the second damper based on the comparison result, and adjusting the operating states of the first fan and the second fan, specifically includes:

[0023] If the current temperature values ​​of the first and second chambers are both greater than their respective target temperature values, and the current temperature value of the third chamber is less than or equal to its target temperature value, then the compressor is controlled to start, the first damper is opened, the second damper is closed, and the speed of the first fan is controlled to increase while the speed of the second fan remains unchanged.

[0024] Optionally, controlling the opening and closing of the compressor, the first damper, and the second damper based on the comparison result, and adjusting the operating states of the first fan and the second fan, specifically includes:

[0025] If the current temperature values ​​of the first and third chambers are both greater than their respective target temperature values, and the current temperature value of the second chamber is less than or equal to its target temperature value, then the compressor is turned on, the first damper and the second damper are both opened, and the speed of the first fan is increased while the speed of the second fan remains unchanged.

[0026] Optionally, the target temperature value of the first room is less than the target temperature value of the second room, and the target temperature value of the third room is less than the target temperature value of the first room.

[0027] In another aspect, the present invention provides a cold storage device, including a compressor, a controller, and a first compartment, a second compartment, and a third compartment arranged from top to bottom and located in different temperature zones. A first damper is provided between the first compartment and the second compartment, and a second damper is provided between the second compartment and the third compartment. A first fan and a second fan are respectively provided in the first compartment and the second compartment. A first temperature sensor, a second temperature sensor, and a third temperature sensor are respectively provided in the first compartment, the second compartment, and the third compartment.

[0028] The controller is electrically connected to the compressor, the first fan, the second fan, the first damper, the second damper, the first temperature sensor, the second temperature sensor, and the third temperature sensor, and executes the above-described refrigeration control method.

[0029] Optionally, the cold storage device further includes a first evaporator and a second evaporator, wherein the first evaporator is disposed below the first compartment and on the back side of the second compartment; and the second evaporator is disposed below the second compartment and on the back side of the third compartment.

[0030] Optionally, the first evaporator and the second evaporator are connected in series.

[0031] Optionally, the second fan includes an upper air supply end and a lower air supply end. The upper air supply end is connected to an upper refrigeration air duct mask, and the air outlet of the upper refrigeration air duct mask leads to the first compartment. The lower air supply end is connected to a lower refrigeration air duct mask, and the air outlet of the lower refrigeration air duct mask leads to the second compartment and the third compartment.

[0032] Optionally, the bottom of the upper refrigeration duct mask is provided with a first return air inlet leading to the first evaporator.

[0033] Optionally, the bottom of the lower refrigeration duct mask is provided with a second return air inlet leading to the second evaporator.

[0034] This invention provides a refrigeration control method and a refrigeration storage device. The method detects the current temperature values ​​of the first, second, and third compartments in different temperature zones, compares them with their respective preset target temperature values, and adjusts the compressor, the opening and closing of the dampers between the compartments, and the working state of the fans in the compartments according to the comparison results. This ensures that the overall refrigeration capacity of the refrigeration device is distributed in each compartment according to the refrigeration capacity matched with its target temperature, thus solving the technical problem in related technologies where the refrigeration capacity distribution in each temperature zone does not match the refrigeration demand of that temperature zone. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the structure of a cold storage device provided in an embodiment of the present invention;

[0036] Figure 2 This is a schematic diagram of the cold airflow direction of a cold storage device in the main viewing direction, provided by an embodiment of the present invention;

[0037] Figure 3 This is a schematic diagram of the cold airflow direction in a side view of a cold storage device provided in an embodiment of the present invention;

[0038] Figure 4 A schematic flowchart illustrating a refrigeration control method for a cold storage device provided in an embodiment of the present invention;

[0039] Figure 5 This invention provides a control topology diagram for a refrigeration control method for a cold storage device.

[0040] Figure 6 This is a schematic flowchart of a refrigeration control method for a cold storage device, provided as another embodiment of the present invention.

[0041] In the picture:

[0042] 1-Upper refrigeration air duct cover; 2-First evaporator; 3-Second fan; 4-Second evaporator; 5-First fan; 6-First damper; 7-Second damper; 8-Lower refrigeration air duct cover; 9-First return air outlet; 10-Second return air outlet; 11-First compartment; 12-Second compartment; 13-Third compartment. Detailed Implementation

[0043] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0044] In related technologies, the distribution of cooling capacity in each temperature zone of multi-temperature zone cold storage equipment is poorly matched with the cooling demand of that zone. Currently, there is no satisfactory solution.

[0045] To address the aforementioned problems, this invention proposes a refrigeration control method and a cold storage device to solve the technical issues described above. A detailed description follows.

[0046] For ease of understanding, this invention will first introduce a cold storage device provided by an embodiment of the present invention. In some preferred embodiments below, this cold storage device can be used as a vertical freezer. However, it should be understood that this cold storage device can also be used as other cold storage devices with multiple temperature zones.

[0047] As an example, combined Figure 1-35. The cold storage equipment includes three temperature zones arranged from top to bottom, corresponding to the first compartment 11, the second compartment 12, and the third compartment 13. Taking it as a vertical freezer as an example, since its main function is freezing, the temperatures of the three compartments can be set to -18℃, -5℃, and -40℃ respectively. The target temperature of the second compartment 12 is higher than that of the first compartment 11, and the target temperature of the first compartment 11 is higher than that of the third compartment 13. The advantage of this arrangement is that the second compartment 12 has the highest target temperature, making it suitable for storing or retrieving food items that need to be stored or retrieved in a short period. Because the frequency of storing or retrieving food in a short period is relatively high, the second compartment 12 is generally located in the middle or lower-middle part of the cold storage equipment, in a position that is easy to open and close, which is beneficial for users to frequently open or close the freezer.

[0048] For example, in this embodiment, the target temperature values ​​for the first chamber 11, the second chamber 12, and the third chamber 13 are set to -18°C, -5°C, and -40°C, respectively.

[0049] As an example, the upper part of the first compartment 11 is a shelving area (such as a -18°C shelving area and a -18°C drawer area) for easy placement of items, and the lower part is a drawer area. The second compartment 12 and the third compartment 13 are both drawer areas (such as a -5°C drawer area and a -40°C drawer area).

[0050] A first fan 5 is installed at the top of the first chamber 11, and a second fan 3 is installed in the second chamber 12. A first damper 6 is installed between the first chamber 11 and the second chamber 12, and a second damper 7 is installed between the second chamber 12 and the third chamber 13. A first temperature sensor, a second temperature sensor, and a third temperature sensor are respectively installed in the first chamber 11, the second chamber 12, and the third chamber 13 to detect the current temperature value in the three chambers.

[0051] The controller of the cold storage equipment is electrically connected to the first temperature sensor, the second temperature sensor, the third temperature sensor, the first damper 6, the second damper 7, the first fan 5, the second fan 3, and the compressor. Specifically, the controller collects the current temperature values ​​of the three compartments through the first, second, and third temperature sensors, compares them with their respective target temperature values, and then controls the working state of the first damper 6, the second damper 7, the first fan 5, the second fan 3, and the compressor based on the comparison results. This allows the cooling capacity to be reasonably distributed among the compartments when the current temperature value in a compartment does not match the target temperature value, until the target temperature value is reached.

[0052] As an example, the evaporator of the cold storage equipment includes two evaporators: a first evaporator 2 and a second evaporator 4. The first evaporator 2 is located below the first compartment 11 and on the back side of the second compartment 12; the second evaporator 4 is located below the second compartment 12 and on the back side of the third compartment 13. For this type of multi-temperature zone cold storage equipment, since the location span of each temperature zone is relatively large, it is more beneficial to set evaporators in the second compartment 12 and the third compartment 13 respectively, which is more conducive to reducing the degree of coldness attenuation during the transfer of cold energy in multiple temperature zones. Specifically, when the fan's air supply end is covered by the refrigeration duct, in order to meet the low-temperature cooling capacity (e.g., -40℃) of the third chamber 13, the evaporator will usually drop below its target temperature (e.g., -40℃). At this time, some of the cold air will pass through the refrigeration duct cover and affect the temperature inside the chamber. In order to avoid affecting the temperature inside the second chamber 12, which has the highest target temperature (e.g., -5℃), and also to meet the cooling demand of the first chamber 11 above (e.g., target temperature of -18℃), reduce the loss of cold air in the process of reaching the air outlet, and reduce energy consumption, two evaporators are installed on the back and bottom sides of the second chamber 12, which can achieve cooling capacity in different temperature zones with lower energy consumption.

[0053] As an example, the first evaporator 2 and the second evaporator 4 are connected in series, which is beneficial for the coordinated control of the two evaporators.

[0054] As an example, the second fan 3 includes an upper air supply end and a lower air supply end, which are respectively connected to the upper refrigeration duct cover 1 and the lower refrigeration duct cover 8 for delivering cold air. When the cold storage equipment is operating, the cold air cooled by the first evaporator 2 and a portion of the cold air cooled by the second evaporator 4 enters the upper refrigeration duct cover 1 of the first compartment 11 through the second fan 3, and then flows through its outlet into the first compartment 11, delivering cold air. Due to the principle of cold air sinking, in some embodiments, a first return air inlet 9 can be provided at the bottom of the upper refrigeration duct cover 1, facing the first evaporator 2, so that cold air flows back from the top of the first evaporator 2, forming a circulating air path, allowing for more complete circulation of cold air.

[0055] On the other hand, the cold air cooled by the second evaporator 4 and part of the cold air cooled by the first evaporator 2 also enter the air outlet of the lower refrigeration duct cover 8 located above the second chamber 12 and the third chamber 13 through the second fan 3, and then reach the second chamber 12 and the third chamber 13 respectively. Furthermore, a second return air inlet 10 leading to the second evaporator 4 is provided at the bottom of the lower refrigeration duct cover 8. Due to the principle of cold air sinking, the cold air can naturally flow back to the second evaporator 4 through the return air inlet below the lower refrigeration duct cover 8, forming a circulating air path, so that the cold air can circulate more fully.

[0056] Furthermore, in this embodiment, the technical solution of air outlet in the second compartment 12 and air return in the first compartment 11 using the first fan 5 at the top meets the refrigeration capacity requirements of the first compartment 11; and realizes the multi-temperature zone function of the cold storage equipment with low energy consumption.

[0057] In one embodiment, the refrigeration control method for the cold storage device provided in this invention, combined with... Figure 4 It includes the following steps:

[0058] Step S101: Detect the current temperature values ​​of the first, second, and third chambers;

[0059] Step S103: Compare the current temperature value with the preset target temperature value for each room;

[0060] Step S105: Based on the comparison result, control the opening and closing of the compressor, the first damper and the second damper, and adjust the working state of the first fan and the second fan until the temperature of the first chamber, the second chamber and the third chamber reaches the target temperature.

[0061] In one embodiment, step S105 specifically includes:

[0062] Step S1051: If the current temperature values ​​of the first compartment 11, the second compartment 12, and the third compartment 13 are all less than or equal to their respective target temperature values, then the compressor, the first damper 6, the second damper 7, the first fan 5, and the second fan 3 are all shut down.

[0063] In step S1051, since the temperature values ​​of each compartment are all lower than the target temperature value, the cooling capacity of each compartment is too low. Therefore, it is necessary to turn off the compressor, stop the cooling, and turn off all dampers and fans so that the cold air is no longer delivered.

[0064] In one embodiment, step S105 specifically includes:

[0065] In step S1052, if the current temperature value of the first chamber 11 is greater than its target temperature value, and the current temperature values ​​of the second chamber 12 and the third chamber 13 are both less than or equal to their respective target temperature values, then the compressor is controlled to start, the first damper 6 is opened, the second damper 7 is closed, and the speed of the first fan 5 is increased while the speed of the second fan 3 is decreased.

[0066] In step S1052, only the temperature value of the first chamber 11 is too high and does not meet the cooling capacity requirement. Therefore, it is necessary to increase the cooling air volume of the first chamber 11. So, with the compressor on, the first damper 6 is opened to increase the flow of cooling air to the first chamber 11, the speed of the first fan 5 is increased, and the amount of cooling air delivered to the first chamber 11 is increased. At the same time, the second damper 7 is closed and the speed of the second fan 3 is reduced to reduce the cooling air delivery to the second chamber 12 and the third chamber 13.

[0067] In one embodiment, step S105 specifically includes:

[0068] In step S0153, if the current temperature value of the second chamber 12 is greater than its target temperature value, and the current temperature values ​​of the first chamber 11 and the third chamber 13 are both less than or equal to their respective target temperature values, then the compressor is turned on, the first damper 6 and the second damper 7 are both closed, the first fan 5 is turned off, and the speed of the second fan 3 is increased.

[0069] In step S1053, only the temperature value of the second chamber 12 is too high and does not meet the cooling capacity requirement. Therefore, it is necessary to increase the cooling air volume of the second chamber 12. Thus, with the compressor on, the first damper 6 and the second damper 7 are closed to reduce the loss of cooling air in the second chamber 12. The first fan 5 is turned off to reduce the cooling air supply to the first chamber 11. At the same time, the speed of the second fan 3 is increased to increase the cooling air supply to the second chamber 12.

[0070] In one embodiment, step S105 specifically includes:

[0071] Step S1054: If the current temperature value of the third chamber 13 is greater than its target temperature value, and the current temperature values ​​of the first chamber 11 and the second chamber 12 are both less than or equal to their respective target temperature values, then control the compressor to start, the first damper 6 to close, the second damper 7 to open, and control the first fan 5 to close, and increase the speed of the second fan 3.

[0072] In step S1054, only the temperature value of the third chamber 13 is too high and does not meet the cooling capacity requirement. Therefore, it is necessary to increase the cooling air volume of the third chamber 13. Thus, with the compressor on, the first damper 6 and the first fan 5 are closed to reduce the supply of cooling air to the first chamber 11. The second damper 7 is opened to promote the supply of cooling air from the second chamber 12 to the third chamber 13. At the same time, the speed of the second fan 3 is increased to increase the supply of cooling air to the third chamber 13.

[0073] In one embodiment, step S105 specifically includes:

[0074] Step S0155: If the current temperature values ​​of the second chamber 12 and the third chamber 13 are both greater than their respective target temperature values, and the current temperature value of the first chamber 11 is less than or equal to its target temperature value, then control the compressor to start, the first damper 6 to close, the second damper 7 to open, and control the first fan 5 to close, and increase the speed of the second fan 3.

[0075] In step S1055, the second chamber 12 and the third chamber 13 are both too hot and do not meet the cooling capacity requirements, so it is necessary to increase the cooling air supply to both chambers simultaneously. Since the cooling air in the second chamber 12 and the third chamber 13 is mainly supplied by the second fan 3, the control strategy is the same as in step S1054, and will not be repeated here.

[0076] In one embodiment, step S105 specifically includes:

[0077] Step S1056: If the current temperature values ​​of the first chamber 11 and the second chamber 12 are both greater than their respective target temperature values, and the current temperature value of the third chamber 13 is less than or equal to its target temperature value, then control the compressor to start, the first damper 6 to open, the second damper 7 to close, and control the speed of the first fan 5 to increase while keeping the speed of the second fan 3 constant.

[0078] In step S1056, both the first chamber 11 and the second chamber 12 are too hot and do not meet the cooling capacity requirements, so it is necessary to increase the cooling air supply to both chambers simultaneously. Therefore, with the compressor running, the first damper 6 should be opened, the second damper 7 should be closed, and the speed of the first fan 5 should be increased. In this way, the increased cooling capacity (including the cooling capacity delivered by the second fan 3 and the return air cooling capacity of the third chamber 13) can be delivered to the first chamber 11 and flow to the second chamber 12 through the first damper 6, thereby increasing the cooling capacity of both chambers. At this time, the second fan 3 can maintain a constant speed.

[0079] In one embodiment, step S105 specifically includes:

[0080] Step S1057: If the current temperature values ​​of the first chamber 11 and the third chamber 13 are both greater than their respective target temperature values, and the current temperature value of the second chamber 12 is less than or equal to its target temperature value, then control the compressor to start, the first damper 6 and the second damper 7 to open, and control the speed of the first fan 5 to increase, while keeping the speed of the second fan 3 constant.

[0081] In step S1057, the first chamber 11 and the third chamber 13 are both too hot and do not meet the cooling capacity requirements, so it is necessary to increase the cooling air supply to these two chambers simultaneously. Therefore, with the compressor running, the first damper 6 and the second damper 7 need to be opened simultaneously to allow the cooling air to circulate between the three chambers. At this time, since the second chamber 12 does not need to increase the cooling capacity, the speed of the second fan 3 can remain unchanged, and only the speed of the first fan 5 needs to be increased.

[0082] Another embodiment of the present invention provides a refrigeration control method for a cold storage device, combined with Figure 6 Specifically, it includes:

[0083] After power is applied, the sensors in the three compartments measure the temperatures as T1, T2, and T3, respectively. In addition, target temperature values ​​for the three compartments are set as L1, L2, and L3, such as -18℃, -5℃, and -40℃.

[0084] First, determine whether T1≤L1, T2≤L2, and T3≤L3 are true. If so, control the compressor to shut down, the refrigeration and freezing dampers to close, and the refrigeration and freezing fans to shut down. Here, the refrigeration damper is the first damper 6 in the above embodiment, the freezing damper is the second damper 7 in the above embodiment, the refrigeration fan is the first fan 5 in the above embodiment, and the freezing fan is the second fan 3 in the above embodiment (the same applies below, and will not be described again).

[0085] If not, continue to determine whether T1>L1, T2≤L2, and T3≤L3 are true. If so, control the compressor to turn on, the refrigerator air damper to open, the freezer air damper to close, the refrigerator fan speed to increase, and the freezer fan speed to decrease.

[0086] If not, continue to determine whether T1≤L1, T2>L2, and T3≤L3 are true. If so, control the compressor to turn on, the refrigeration and freezing dampers to close, the refrigeration fan to turn off, and the freezing fan speed to increase.

[0087] If not, continue to determine whether T1≤L1, T2≤L2, and T3>L3 are true. If so, control the compressor to turn on, the refrigerator damper to close, the freezer damper to open, the refrigerator damper to turn off, and the freezer fan speed to increase.

[0088] If not, continue to determine whether T1≤L1, T2>L2, and T3>L3 are true. If so, control the compressor to turn on, the refrigerator air damper to close, the freezer air damper to open, the refrigerator air damper to turn off, and the freezer fan speed to increase.

[0089] If not, continue to determine whether T1 > L1, T2 > L2, and T3 ≤ L3 are true. If so, control the compressor to turn on, the refrigerator damper to open, the freezer damper to close, the refrigerator fan speed to increase, and the freezer fan to turn on but at a constant speed.

[0090] If not, continue to determine whether T1 > L1, T2 ≤ L2, and T3 > L3 are true. If so, control the compressor to turn on, the refrigerator damper to open, the freezer damper to open, the refrigerator fan speed to increase, and the freezer fan to turn on but the speed remains unchanged.

[0091] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A refrigeration control method for a cold storage device, characterized in that, The cold storage equipment includes a compressor, and a first compartment, a second compartment, and a third compartment arranged from top to bottom and located in different temperature zones. A first damper is provided between the first compartment and the second compartment, and a second damper is provided between the second compartment and the third compartment. The first compartment and the second compartment are respectively equipped with a first fan and a second fan for supplying cold air to each compartment. The control method includes: Detect the current temperature values ​​of the first, second, and third chambers; Compare the current temperature value with the preset target temperature value for each room; Based on the comparison results, the compressor, the first damper, and the second damper are controlled to open and close, and the working status of the first fan and the second fan is adjusted until the temperature of the first chamber, the second chamber, and the third chamber reaches the target temperature. The step of controlling the opening and closing of the compressor, the first damper, and the second damper based on the comparison result, and adjusting the operating states of the first fan and the second fan, specifically includes: If the current temperature value of the first chamber is greater than its target temperature value, and the current temperature values ​​of the second and third chambers are both less than or equal to their respective target temperature values, then the compressor is controlled to start, the first damper is opened, the second damper is closed, and the speed of the first fan is increased while the speed of the second fan is decreased. The cold storage equipment further includes a first evaporator and a second evaporator. The first evaporator is disposed below the first compartment and located on the back side of the second compartment; the second evaporator is disposed below the second compartment and located on the back side of the third compartment. The second fan includes an upper air supply end and a lower air supply end. The upper air supply end is connected to an upper refrigeration air duct mask, and the air outlet of the upper refrigeration air duct mask leads to the first compartment. The lower air supply end is connected to a lower refrigeration air duct mask, and the air outlet of the lower refrigeration air duct mask leads to the second compartment and the third compartment.

2. The refrigeration control method according to claim 1, characterized in that, The step of controlling the opening and closing of the compressor, the first damper, and the second damper based on the comparison result, and adjusting the operating states of the first fan and the second fan, specifically includes: If the current temperature values ​​of the first, second, and third compartments are all less than or equal to their respective target temperature values, then the compressor, the first damper, the second damper, the first fan, and the second fan are all shut down.

3. The refrigeration control method according to claim 1, characterized in that, The step of controlling the opening and closing of the compressor, the first damper, and the second damper based on the comparison result, and adjusting the operating states of the first fan and the second fan, specifically includes: If the current temperature value of the second chamber is greater than its target temperature value, and the current temperature values ​​of the first chamber and the third chamber are both less than or equal to their respective target temperature values, then the compressor is turned on, the first damper and the second damper are both closed, the first fan is turned off, and the speed of the second fan is increased.

4. The refrigeration control method according to claim 1, characterized in that, The step of controlling the opening and closing of the compressor, the first damper, and the second damper based on the comparison result, and adjusting the operating states of the first fan and the second fan, specifically includes: If the current temperature value of the third chamber is greater than its target temperature value, and the current temperature values ​​of the first and second chambers are both less than or equal to their respective target temperature values, then the compressor is controlled to start, the first damper is closed, the second damper is opened, the first fan is controlled to stop, and the speed of the second fan is increased.

5. The refrigeration control method according to claim 1, characterized in that, The step of controlling the opening and closing of the compressor, the first damper, and the second damper based on the comparison result, and adjusting the operating states of the first fan and the second fan, specifically includes: If the current temperature values ​​of the second and third chambers are both greater than their respective target temperature values, and the current temperature value of the first chamber is less than or equal to its target temperature value, then the compressor is controlled to start, the first damper is closed, the second damper is opened, the first fan is controlled to stop, and the speed of the second fan is increased.

6. The refrigeration control method according to claim 1, characterized in that, The step of controlling the opening and closing of the compressor, the first damper, and the second damper based on the comparison result, and adjusting the operating states of the first fan and the second fan, specifically includes: If the current temperature values ​​of the first and second chambers are both greater than their respective target temperature values, and the current temperature value of the third chamber is less than or equal to its target temperature value, then the compressor is controlled to start, the first damper is opened, the second damper is closed, and the speed of the first fan is controlled to increase while the speed of the second fan remains unchanged.

7. The refrigeration control method according to claim 1, characterized in that, The step of controlling the opening and closing of the compressor, the first damper, and the second damper based on the comparison result, and adjusting the operating states of the first fan and the second fan, specifically includes: If the current temperature values ​​of the first and third chambers are both greater than their respective target temperature values, and the current temperature value of the second chamber is less than or equal to its target temperature value, then the compressor is turned on, the first damper and the second damper are both opened, and the speed of the first fan is increased while the speed of the second fan remains unchanged.

8. The refrigeration control method according to any one of claims 1-7, characterized in that, The target temperature value of the first room is less than the target temperature value of the second room, and the target temperature value of the third room is less than the target temperature value of the first room.

9. A cold storage device, characterized in that, The system includes a compressor, a controller, and three compartments arranged from top to bottom and located in different temperature zones: a first damper between the first and second compartments, a second damper between the second and third compartments, and a first fan and a second fan respectively configured to supply cool air to each compartment in the first and second compartments. A first temperature sensor, a second temperature sensor, and a third temperature sensor are respectively installed in the first, second, and third compartments. The controller is electrically connected to the compressor, the first fan, the second fan, the first damper, the second damper, the first temperature sensor, the second temperature sensor, and the third temperature sensor, respectively, and executes the refrigeration control method according to any one of claims 1-8.

10. The cold storage equipment according to claim 9, characterized in that, The first evaporator and the second evaporator are connected in series.

11. The cold storage equipment according to any one of claims 9, characterized in that, The bottom of the upper refrigeration air duct mask is provided with a first return air inlet leading to the first evaporator.

12. The cold storage equipment according to any one of claims 9, characterized in that, The bottom of the lower refrigeration duct mask is provided with a second return air inlet leading to the second evaporator.

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