Refrigerating system fan control method and device

Abstract

The embodiment of the invention discloses a refrigerating system fan control method and device. The refrigerating system comprises four fan control point positions, the first fan control point position controls one fan, the second fan control point position controls at most two fans, the third fan control point position controls at most four fans, and the fourth fan control point position controls at most nine fans; the refrigerating system fan control method comprises the steps that according to refrigerating temperature parameters of a refrigerating system and a condenser fan control point position combination comparison table, a target-grade fan control point position combination is determined; and according to the target-grade fan control point position combination, fans corresponding to the target-grade fan control point position combination are controlled to operate, so that the condensation temperature of the refrigeration system is adjusted. Therefore, according to the scheme, multi-stage fine adjustment of the refrigerating system can be achieved under the limited fan control point position, and the control precision of the condensing temperature of the refrigerating system is improved.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of fan refrigeration control, and in particular, to a method and device for controlling a fan of a refrigeration system. Background Art

[0002] The traditional control of the fan of a refrigeration system usually adopts a "one-to-one" mode, that is, each fan needs to be separately configured with a control point. For example, controlling 16 fans requires 16 DO points, resulting in high hardware complexity and increased costs. To address the above problems, currently, a fan hierarchical control method is adopted under limited fan control points - that is, each fan control point controls multiple fans with the same quantity to reduce the hardware complexity and cost of the refrigeration system. However, the refrigeration system adopting the fan hierarchical control method is difficult to achieve multi-level fine adjustment under limited fan control points, and there is a problem of insufficient temperature control accuracy. Summary of the Invention

[0003] The embodiments of the present invention provide a method and device for controlling a fan of a refrigeration system to achieve multi-level fine adjustment of the refrigeration system under limited fan control points and improve the control accuracy of the condensation temperature of the refrigeration system.

[0004] In a first aspect, the embodiments of the present invention provide a method for controlling a fan of a refrigeration system. The refrigeration system includes 4 fan control points. The first fan control point controls one fan, the second fan control point controls at most two fans, the third fan control point controls at most four fans, and the fourth fan control point controls at most nine fans;

[0005] The method for controlling a fan of the refrigeration system includes:

[0006] Determine a target-level fan control point combination according to the refrigeration temperature parameter and the condenser fan control point combination comparison table of the refrigeration system;

[0007] Control the fans corresponding to the target-level fan control point combination to operate according to the target-level fan control point combination to adjust the condensation temperature of the refrigeration system.

[0008] Optionally, before determining the target-level fan control point combination, it includes:

[0009] Obtain the corresponding condenser fan control point combination comparison table according to the number of fans.

[0010] Optionally, the refrigeration temperature parameter includes the current condensation temperature and the condensation temperature change trend;

[0011] The step of determining the target-level fan control point combination includes:

[0012] Obtain the set value corresponding to each level of the fan control point combination according to the condensation temperature change trend and the condenser fan control point combination comparison table;

[0013] Determine the adaptable fan control point combination according to the current condensation temperature and the set value corresponding to each level of the fan control point combination;

[0014] If the number of the adaptable fan control point combinations is equal to 1, then the adaptable fan control point combination is the target level fan control point combination;

[0015] If the number of the adaptable fan control point combinations is greater than 1, then determine the target level fan control point combination according to the cooling adjustment ability of each level of the adaptable fan control point combination.

[0016] Optionally, the condensation temperature change trend includes an upward trend and a downward trend; the set value includes an upward threshold and a downward threshold;

[0017] The step of obtaining the set value corresponding to each level of the fan control point combination includes:

[0018] If the condensation temperature change trend is the upward trend, obtain the upward threshold corresponding to each level of the fan control point combination according to the condenser fan control point combination comparison table;

[0019] If the condensation temperature change trend is the downward trend, obtain the downward threshold corresponding to each fan control point combination according to the condenser fan control point combination comparison table.

[0020] Optionally, the adaptable fan control point combination includes a first adaptable fan control point combination or a second adaptable fan control point combination;

[0021] The step of determining the adaptable fan control point combination includes:

[0022] Screen the maximum value of the upward thresholds smaller than the current condensation temperature as the target upward threshold, and the fan control point combination corresponding to the target upward threshold is the first adaptable fan control point combination; or,

[0023] Screen the downward threshold corresponding to the next-level fan control point combination of the fan control point combination with the smallest level corresponding to the minimum value of the downward thresholds greater than the current condensation temperature as the target downward threshold, and the fan control point combination corresponding to the target downward threshold is the second adaptable fan control point combination.

[0024] Optionally, controlling the operation of the fans corresponding to the target - level fan control point combinations includes:

[0025] Determining a target fan control signal according to the target - level fan control point combinations;

[0026] Adjusting the current fan control signal to the target fan control signal based on the Gray - code encoding method.

[0027] Optionally, after obtaining the corresponding condenser fan control point combination comparison table, it further includes:

[0028] Correcting the rising threshold corresponding to each - level fan control point combination according to the environmental parameters and the rising threshold corresponding to each - level fan control point combination to obtain the corrected rising threshold corresponding to each - level fan control point combination;

[0029] Correcting the falling threshold corresponding to the next - level fan control point combination according to the corrected rising threshold corresponding to the previous - level fan control point combination to obtain the corrected falling threshold corresponding to the next - level fan control point combination;

[0030] The cooling - down adjustment ability of the previous - level fan control point combination is greater than that of the next - level fan control point combination.

[0031] Optionally, the environmental parameters include an environmental temperature value and an environmental humidity value;

[0032] The corrected rising threshold corresponding to each - level fan control point combination = the rising threshold corresponding to each - level fan control point combination+K1*(the environmental temperature value - 25)+K2*(the environmental humidity value - 50%);

[0033] Wherein, K1 is a temperature compensation coefficient and K2 is a humidity compensation coefficient.

[0034] Optionally, the corrected falling threshold corresponding to the next - level fan control point combination = the corrected rising threshold corresponding to the previous - level fan control point combination - a preset difference.

[0035] In a second aspect, an embodiment of the present invention further provides a refrigeration - system fan control device, which includes:

[0036] A target - level fan control point combination determination module, configured to determine a target - level fan control point combination according to the refrigeration temperature parameter of the refrigeration system and the condenser fan control point combination comparison table;

[0037] An adjustment module, configured to control the operation of the fans corresponding to the target - level fan control point combinations according to the target - level fan control point combinations, so as to adjust the condensation temperature of the refrigeration system.

[0038] In the embodiment of the present invention, the target - level fan control point combination is determined according to the refrigeration temperature parameter of the refrigeration system and the condenser fan control point combination comparison table; according to the target - level fan control point combination, the operation of the fans corresponding to the target - level fan control point combination is controlled to adjust the condensation temperature of the refrigeration system. Thus, this solution can achieve multi - level fine adjustment of the refrigeration system by adapting appropriate - level fan control point combinations under limited fan control points, and improve the control accuracy of the condensation temperature of the refrigeration system. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0040] Figure 1 It is a schematic flowchart of a method for controlling a fan of a refrigeration system provided by an embodiment of the present invention;

[0041] Figure 2 It is a schematic flowchart of steps for determining a target - level fan control point combination provided by an embodiment of the present invention;

[0042] Figure 3 It is a schematic structural diagram of a device for controlling a fan of a refrigeration system provided by an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0043] In order to enable those skilled in the art to better understand the solution of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0044] It should be noted that the terms "first", "second", etc. in the specification, claims and the above-mentioned drawings of the present invention are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present invention described here can be implemented in an order other than those illustrated or described here. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0045] An embodiment of the present invention provides a method for controlling a fan of a refrigeration system. This method for controlling a fan of a refrigeration system is applied to a refrigeration system that adjusts the condensation temperature through a fan. Among them, the refrigeration system includes 4 fan control points. The first fan control point controls one fan, the second fan control point controls at most two fans, the third fan control point controls at most four fans, and the fourth fan control point controls at most nine fans.

[0046] Exemplarily, Table 1 is a distribution table of the number of fans that can be driven by each fan control point when different numbers of fans are set in the refrigeration system.

[0047]

[0048]

[0049] The refrigeration system needs to control the condensation temperature within a certain range, and the condensation temperature of the refrigeration system can be adjusted by the fan. When the condensation temperature of the refrigeration system is in different temperature ranges, different combinations of fan control points (such as AB, BC, etc.) can be controlled to control different numbers of fans to operate, so as to achieve multi-level fine adjustment of the refrigeration system under limited fan control points and improve the control accuracy of the condensation temperature of the refrigeration system.

[0050] Specifically, Figure 1 is a schematic flow chart of a method for controlling a fan of a refrigeration system provided by an embodiment of the present invention. As Figure 1 shown, this method for controlling a fan of a refrigeration system specifically includes:

[0051] S110. Determine the target level fan control point combination according to the refrigeration temperature parameter of the refrigeration system and the comparison table of condenser fan control point combinations.

[0052] Among them, the refrigeration temperature parameter refers to the current temperature situation of the refrigeration system, such as the current condensation temperature and the change trend of the condensation temperature (the rise and fall change of the current condensation temperature compared with the condensation temperature collected last time). The control point combination comparison table of the condenser fan is a comparison table of the relationship between the control combinations of different fan control points and the set adjustment temperature.

[0053] Specifically, according to the refrigeration temperature parameter of the refrigeration system, by comparing the temperature set value corresponding to each fan control point combination in the control point combination comparison table of the condenser fan, the fan control point combination applicable to adjusting the current condensation temperature - the target level fan control point combination can be determined, thereby facilitating the realization of multi-level refined adjustment of the refrigeration system through the target level fan control point combination and improving the control accuracy of the condensation temperature of the refrigeration system.

[0054] S120. According to the target level fan control point combination, control the operation of the fans corresponding to the target level fan control point combination to adjust the condensation temperature of the refrigeration system.

[0055] Among them, each fan control point corresponds to controlling at least one fan. The number of fans controlled by each fan control point is determined in advance according to the total number of fans and the number of control points. The number of fans controlled by each fan control point is determined based on fan hierarchical control + combined logic optimization to realize fan hierarchical start-stop control by controlling the fan control point combination.

[0056] Exemplarily, as shown in Table 1, when the total number of fans in the refrigeration system is 8 and the number of fan control points is 4, the first fan control point A corresponds to controlling 1 fan, the second fan control point B corresponds to controlling 2 fans, the third fan control point C corresponds to controlling 4 fans, and the fourth fan control point D corresponds to controlling 1 fan. At this time, the fan control point combinations include: A, B, AB, C, AC, BC, ABC, ABCD. The first-level fan control point combination A can control 1 fan to run, the second-level fan control point combination B can control 2 fans to run, the third-level fan control point combination AB can control 3 fans to run, the fourth-level fan control point combination C can control 4 fans to run, the fifth-level fan control point combination AC can control 5 fans to run, the sixth-level fan control point combination BC can control 6 fans to run, the seventh-level fan control point combination ABC can control 7 fans to run, and the eighth-level fan control point combination ABCD can control 8 fans to run. Thus, the above refrigeration system can realize eight-level start-stop control of the fans by controlling the fan control point combination.

[0057] In an embodiment of the present invention, a target - level fan control point combination is determined according to a comparison table of refrigeration temperature parameters of a refrigeration system and condenser fan control point combinations; according to the target - level fan control point combination, the fan corresponding to the target - level fan control point combination is controlled to operate, so as to adjust the condensation temperature of the refrigeration system. Thus, this solution can achieve multi - level fine - tuning of the refrigeration system by adapting a suitable - level fan control point combination under limited fan control points, and improve the control accuracy of the condensation temperature of the refrigeration system.

[0058] On the basis of the above - mentioned embodiment, optionally, before determining the target - level fan control point combination, it includes:

[0059] According to the number of fans, obtain the corresponding comparison table of condenser fan control point combinations.

[0060] Among them, since the number of fans controlled by each fan control point is inconsistent, it is necessary to determine the number of fans corresponding to each fan control point according to the number of fans. According to the number of fans corresponding to each fan control point, a comparison table of condenser fan control point combinations including various levels of fan control point combinations can be obtained in advance, so as to subsequently screen a suitable - level fan control point combination according to the comparison table of condenser fan control point combinations to adjust the condensation temperature of the refrigeration system.

[0061] Exemplarily, Table 2 is the comparison table of condenser fan control point combinations corresponding to different numbers of fans set in the refrigeration system in Table 1.

[0062]

[0063]

[0064] Among them, the levels of the fan control point combinations included in the comparison table of condenser fan control point combinations corresponding to different numbers of fans set in the refrigeration system increase sequentially from left to right.

[0065] On the basis of the above - mentioned embodiment, optionally, the refrigeration temperature parameters include the current condensation temperature and the trend of change in the condensation temperature.

[0066] Among them, the current condensation temperature is the actual temperature of the current refrigeration of the refrigeration system, and the trend of change in the condensation temperature refers to the change in the actual temperature of the current refrigeration compared with the actual temperature of the refrigeration at the previous moment.

[0067] On the basis of the above - mentioned embodiment, optionally, Figure 2 is a schematic flow chart of the steps for determining a target - level fan control point combination provided by an embodiment of the present invention. As Figure 2 shown, the steps for determining the target - level fan control point combination are described as follows:

[0068] S210. Obtain the set value corresponding to each level of fan control point combination according to the condensation temperature change trend and the condenser fan control point combination comparison table.

[0069] Among them, the condensation temperature change trend includes an upward trend and a downward trend; the set value corresponding to each level of fan control point combination includes an upward threshold and a downward threshold.

[0070] Specifically, if the condensation temperature change trend is an upward trend, obtain the upward threshold corresponding to each level of fan control point combination according to the condenser fan control point combination comparison table;

[0071] If the condensation temperature change trend is a downward trend, obtain the downward threshold corresponding to each fan control point combination according to the condenser fan control point combination comparison table.

[0072] Exemplarily, if the refrigeration system includes 8 fans and the number of fans that each fan control point can drive refers to Table 1 (the first fan control point A corresponds to controlling 1 fan, the second fan control point B corresponds to controlling 2 fans, the third fan control point C corresponds to controlling 4 fans, and the fourth fan control point D corresponds to controlling 1 fan), according to the condenser fan control point combination comparison table of the 8 fans shown in Table 2, the set value corresponding to each level of fan control point combination can be obtained.

[0073] When the condensation temperature change trend is an upward trend, obtain that the upward threshold corresponding to the fan control point combination A is 35 according to the condenser fan control point combination comparison table, the upward threshold corresponding to the fan control point combination B is 37.8, the upward threshold corresponding to the fan control point combination AB is 40.6, the upward threshold corresponding to the fan control point combination C is 40.6, the upward threshold corresponding to the fan control point combination AC is 43.4, the upward threshold corresponding to the fan control point combination BC is 43.4, the upward threshold corresponding to the fan control point combination ABC is 46.2, and the upward threshold corresponding to the fan control point combination ABCD is 49;

[0074] When the condensation temperature change trend is a downward trend, obtain that the downward threshold corresponding to the fan control point combination fan fully closed is 28.5 according to the condenser fan control point combination comparison table, the downward threshold corresponding to the fan control point combination A is 31.3, the downward threshold corresponding to the fan control point combination B is 34.1, the downward threshold corresponding to the fan control point combination AB is 34.1, the downward threshold corresponding to the fan control point combination C is 36.9, the downward threshold corresponding to the fan control point combination AC is 36.9, the downward threshold corresponding to the fan control point combination BC is 39.7, and the downward threshold corresponding to the fan control point combination ABC is 42.5.

[0075] S220. Determine the adapted fan control point combination according to the current condensation temperature and the set value corresponding to each level of fan control point combination.

[0076] Specifically, the adapted fan control point combination includes the first adapted fan control point combination or the second adapted fan control point combination;

[0077] The steps for determining the adapted fan control point combination include:

[0078] Select the maximum value among the rising thresholds smaller than the current condensation temperature as the target rising threshold, and the fan control point combination corresponding to the target rising threshold is the first adapted fan control point combination; or,

[0079] Select the falling threshold corresponding to the next-level fan control point combination of the fan control point combination with the smallest level among the falling thresholds larger than the current condensation temperature as the target falling threshold, and the fan control point combination corresponding to the target falling threshold is the second adapted fan control point combination.

[0080] S230. If the number of adapted fan control point combinations is equal to 1, the adapted fan control point combination is the target-level fan control point combination.

[0081] S240. If the number of adapted fan control point combinations is greater than 1, determine the target-level fan control point combination according to the temperature reduction adjustment ability of each level of adapted fan control point combination.

[0082] Among them, if the number of adapted fan control point combinations is greater than 1, the first adapted fan control point combination with the strongest temperature reduction adjustment ability is the target-level fan control point combination, or the second adapted fan control point combination with the weakest temperature reduction adjustment ability is the target-level fan control point combination.

[0083] Exemplarily, the refrigeration system includes 8 fans, and the number of fans that each fan control point can drive refers to Table 1. The trend of the condensation temperature change is an upward trend. If the current condensation temperature is 44°C, then the target upward threshold at this time is 43.4, and the fan control point combinations corresponding to the target upward threshold are the first adapted fan control point combination BC and the first adapted fan control point combination AC. According to the cooling adjustment capabilities of the first adapted fan control point combination BC and the first adapted fan control point combination AC, the first adapted fan control point combination BC with strong cooling ability can be selected as the target level fan control point combination. Among them, the number of fans controlled by the fan control point combination can be used to judge the cooling adjustment ability of the adapted fan control point combination. The first adapted fan control point combination BC can control 6 fans to operate, and the first adapted fan control point combination AC can control 5 fans to operate. Therefore, the cooling adjustment ability of the first adapted fan control point combination BC is greater than that of the first adapted fan control point combination AC.

[0084] The refrigeration system includes 8 fans, and the number of fans that each fan control point can drive refers to Table 1. The trend of the condensation temperature change is an upward trend. If the current condensation temperature is 38°C, then the target upward threshold at this time is 37.8, and the fan control point combination corresponding to the target upward threshold is the first adapted fan control point combination B. At this time, the number of the first adapted fan control point combinations is equal to 1, and the first adapted fan control point combination B is the target level fan control point combination.

[0085] The refrigeration system includes 8 fans, and the number of fans that each fan control point can drive refers to Table 1. The trend of the condensation temperature change is a downward trend. If the current condensation temperature is 36°C, then the target downward threshold at this time is 34.1 (the minimum value of the downward thresholds greater than the current condensation temperature is 36.9, and the downward threshold 34.1 corresponding to the fan control point combination AB, which is the next level of the fan control point combination C with the smallest level corresponding to the downward threshold 36.9, is the target downward threshold), and the fan control point combinations corresponding to the target downward threshold are the second adapted fan control point combination B and the first adapted fan control point combination AB. According to the cooling adjustment capabilities of the second adapted fan control point combination B and the first adapted fan control point combination AB, the second adapted fan control point combination B with weak cooling ability can be selected as the target level fan control point combination. Among them, the number of fans controlled by the fan control point combination can be used to judge the cooling adjustment ability of the adapted fan control point combination. The second adapted fan control point combination B can control 2 fans to operate, and the second adapted fan control point combination AB can control 3 fans to operate. Therefore, the cooling adjustment ability of the second adapted fan control point combination AB is greater than that of the second adapted fan control point combination B.

[0086] The refrigeration system includes 8 fans, and the number of fans that each fan control point can drive refers to Table 1. The trend of the condensation temperature change is a downward trend. If the current condensation temperature is 40 °C, then the target decrease threshold at this time is 39.7, and the fan control point combination corresponding to the target decrease threshold is the second adapted fan control point combination BC. At this time, the number of the second adapted fan control point combinations is equal to 1, and the second adapted fan control point combination BC is the target level fan control point combination.

[0087] Based on the above embodiments, optionally, controlling the fans corresponding to the target level fan control point combination to operate includes:

[0088] Determining a target fan control signal according to the target level fan control point combination.

[0089] Wherein, each fan control point combination corresponds to a target fan control signal. Exemplarily, the refrigeration system includes 4 fan control points. The target fan control signal corresponding to the fan control point combination of all off is 0000, the target fan control signal corresponding to the fan control point combination A is 1000, the target fan control signal corresponding to the fan control point combination B is 0100, the target fan control signal corresponding to the fan control point combination C is 0010, the target fan control signal corresponding to the fan control point combination D is 0001, the target fan control signal corresponding to the fan control point combination AB is 1100, the target fan control signal corresponding to the fan control point combination AC is 1010, the target fan control signal corresponding to the fan control point combination AD is 1001, the target fan control signal corresponding to the fan control point combination BC is 0110, the target fan control signal corresponding to the fan control point combination BD is 0101, the target fan control signal corresponding to the fan control point combination CD is 0011, the target fan control signal corresponding to the fan control point combination ABC is 1110, the target fan control signal corresponding to the fan control point combination ACD is 1011, the target fan control signal corresponding to the fan control point combination ABD is 1101, the target fan control signal corresponding to the fan control point combination BCD is 0111, and the target fan control signal corresponding to the fan control point combination ABCD is 1111.

[0090] Adjusting the current fan control signal to the target fan control signal based on the Gray code encoding method.

[0091] Wherein, adjusting the current fan control signal to the target fan control signal based on the Gray code encoding method, that is, each time of switching only changes the data signal corresponding to 1 fan control point, which can realize the peak-shifting control of the fan control points and reduce the risk of signal conflict.

[0092] Exemplarily, the current fan control signal is 1110, and the target fan control signal is 0111. Based on the Gray code encoding method, the current fan control signal 1110 is first adjusted to 0110 and then adjusted to the target fan control signal 0111. Alternatively, based on the Gray code encoding method, the current fan control signal 1110 is first adjusted to 1111 and then adjusted to the target fan control signal 0111.

[0093] Based on the above embodiments, optionally, after obtaining the corresponding condenser fan control point combination comparison table, it further includes:

[0094] According to the environmental parameters and the rising threshold corresponding to each level of fan control point combination, the rising threshold corresponding to each level of fan control point combination is corrected to obtain the corrected rising threshold corresponding to each level of fan control point combination.

[0095] Specifically, the environmental parameters include the environmental temperature value and the environmental humidity value;

[0096] The corrected rising threshold corresponding to each level of fan control point combination = the rising threshold corresponding to each level of fan control point combination + K1 * (environmental temperature value - 25) + K2 * (environmental humidity value - 50%); where K1 is the temperature compensation coefficient and K2 is the humidity compensation coefficient.

[0097] According to the corrected rising threshold corresponding to the upper-level fan control point combination, the falling threshold corresponding to the lower-level fan control point combination is corrected to obtain the corrected falling threshold corresponding to the lower-level fan control point combination;

[0098] Specifically, the corrected falling threshold corresponding to the lower-level fan control point combination = the corrected rising threshold corresponding to the upper-level fan control point combination - a preset difference. Exemplarily, Figure 2 the preset difference in is 6.5.

[0099] The cooling adjustment ability of the upper-level fan control point combination is greater than that of the lower-level fan control point combination, that is, the number of fans controlled by the upper-level fan control point combination is greater than the number of fans controlled by the lower-level fan control point combination.

[0100] Figure 3 It is a schematic structural diagram of a fan control device for a refrigeration system provided by an embodiment of the present invention. As Figure 3 shown, the fan control device for the refrigeration system includes:

[0101] A target level fan control point combination determination module 310, configured to determine a target level fan control point combination according to the refrigeration temperature parameter of the refrigeration system and the condenser fan control point combination comparison table;

[0102] The adjustment module 320 is configured to control the operation of the fans corresponding to the target - level fan control point combination according to the target - level fan control point combination, so as to adjust the condensation temperature of the refrigeration system.

[0103] In the embodiment of the present invention, the target - level fan control point combination determination module 310 determines the target - level fan control point combination according to the refrigeration temperature parameter of the refrigeration system and the condenser fan control point combination comparison table; the adjustment module 320 controls the operation of the fans corresponding to the target - level fan control point combination according to the target - level fan control point combination, so as to adjust the condensation temperature of the refrigeration system. Thus, this solution can achieve multi - level refined adjustment of the refrigeration system by adapting the appropriate - level fan control point combination under limited fan control points, and improve the control accuracy of the condensation temperature of the refrigeration system.

[0104] Based on the above - mentioned embodiment, optionally, the refrigeration - system fan control device further includes:

[0105] An acquisition module, configured to acquire the corresponding condenser fan control point combination comparison table according to the number of fans.

[0106] Based on the above - mentioned embodiment, optionally, the refrigeration temperature parameter includes the current condensation temperature and the condensation temperature change trend;

[0107] The target - level fan control point combination determination module includes:

[0108] A set - value determination unit, configured to acquire the set value corresponding to each level of fan control point combination according to the condensation temperature change trend and the condenser fan control point combination comparison table;

[0109] An adapted - fan - control - point - combination determination unit, configured to determine the adapted fan control point combination according to the current condensation temperature and the set value corresponding to each level of fan control point combination;

[0110] A target - level fan control point combination determination unit, configured to: if the number of adapted fan control point combinations is equal to 1, the adapted fan control point combination is the target - level fan control point combination; if the number of adapted fan control point combinations is greater than 1, determine the target - level fan control point combination according to the cooling - adjustment ability of each level of adapted fan control point combination.

[0111] Based on the above - mentioned embodiment, optionally, the condensation temperature change trend includes an upward trend and a downward trend; the set value includes an upward threshold and a downward threshold;

[0112] Based on the above - mentioned embodiment, optionally, the set - value determination unit is specifically configured to:

[0113] If the change trend of the condensation temperature is an upward trend, obtain the upward threshold corresponding to each level of fan control point combination according to the condenser fan control point combination comparison table;

[0114] If the change trend of the condensation temperature is a downward trend, obtain the downward threshold corresponding to each fan control point combination according to the condenser fan control point combination comparison table.

[0115] Based on the above embodiments, optionally, the adapted fan control point combination includes a first adapted fan control point combination or a second adapted fan control point combination;

[0116] Based on the above embodiments, optionally, the adapted fan control point combination determination unit is specifically configured to:

[0117] Screen the maximum value among the upward thresholds smaller than the current condensation temperature as the target upward threshold, and the fan control point combination corresponding to the target upward threshold is the first adapted fan control point combination; or,

[0118] Screen the downward threshold corresponding to the next-level fan control point combination of the fan control point combination with the smallest level corresponding to the minimum value among the downward thresholds greater than the current condensation temperature as the target downward threshold, and the fan control point combination corresponding to the target downward threshold is the second adapted fan control point combination.

[0119] Based on the above embodiments, optionally, the adjustment module includes:

[0120] A target fan control signal determination unit, configured to determine a target fan control signal according to the target level fan control point combination;

[0121] A target fan control signal adjustment unit, configured to adjust the current fan control signal to the target fan control signal based on the Gray code encoding method.

[0122] Based on the above embodiments, optionally, the refrigeration system fan control device further includes:

[0123] A first correction module, configured to correct the upward threshold corresponding to each level of fan control point combination according to the environmental parameters and the upward threshold corresponding to each level of fan control point combination, to obtain the corrected upward threshold corresponding to each level of fan control point combination;

[0124] A second correction module, configured to correct the downward threshold corresponding to the next-level fan control point combination according to the corrected upward threshold corresponding to the previous-level fan control point combination, to obtain the corrected downward threshold corresponding to the next-level fan control point combination;

[0125] The temperature reduction adjustment ability of the upper-level fan control point combination is greater than that of the lower-level fan control point combination.

[0126] It should be understood that various forms of the processes shown above can be used, steps can be reordered, added or deleted. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and no limitation is made herein.

[0127] The above specific embodiments do not constitute a limitation on the protection scope of the present invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A method for controlling a fan of a refrigeration system, characterized in that, The refrigeration system includes four fan control points. The first fan control point controls one fan, the second fan control point controls at most two fans, the third fan control point controls at most four fans, and the fourth fan control point controls at most nine fans; The method for controlling the fans of the refrigeration system includes: Determine the target-level fan control point combination according to the refrigeration temperature parameter of the refrigeration system and the condenser fan control point combination comparison table; Control the fans corresponding to the target-level fan control point combination to operate according to the target-level fan control point combination, so as to adjust the condensation temperature of the refrigeration system.

2. The method for controlling a blower of a refrigeration system according to claim 1, wherein Before determining the target-level fan control point combination, it includes: Obtain the corresponding condenser fan control point combination comparison table according to the number of fans.

3. The method for controlling a fan of a refrigeration system according to claim 1, characterized in that, The refrigeration temperature parameter includes the current condensation temperature and the condensation temperature change trend; The step of determining the target-level fan control point combination includes: Obtain the set value corresponding to each level of the fan control point combination according to the condensation temperature change trend and the condenser fan control point combination comparison table; Determine the adaptable fan control point combination according to the current condensation temperature and the set value corresponding to each level of the fan control point combination; If the number of the adaptable fan control point combinations is equal to 1, then the adaptable fan control point combination is the target-level fan control point combination; If the number of the adaptable fan control point combinations is greater than 1, then determine the target-level fan control point combination according to the cooling adjustment ability of each level of the adaptable fan control point combination.

4. The method for controlling a blower of a refrigeration system according to claim 3, wherein, The condensation temperature change trend includes an upward trend and a downward trend; the set value includes an upward threshold and a downward threshold; The step of obtaining the set value corresponding to each level of the fan control point combination includes: If the condensation temperature change trend is the upward trend, obtain the corresponding upward threshold of each level of the fan control point combination according to the condenser fan control point combination comparison table; If the condensation temperature change trend is the downward trend, obtain the corresponding downward threshold of each fan control point combination according to the condenser fan control point combination comparison table.

5. The method for controlling a blower of a refrigeration system according to claim 4, wherein The adaptable fan control point combination includes a first adaptable fan control point combination or a second adaptable fan control point combination; The step of determining the adaptable fan control point combination includes: Select the maximum value of the upward thresholds smaller than the current condensation temperature as the target upward threshold, and the fan control point combination corresponding to the target upward threshold is the first adaptable fan control point combination; or, Select the downward threshold corresponding to the next-level fan control point combination of the fan control point combination with the smallest level corresponding to the minimum value of the downward thresholds greater than the current condensation temperature as the target downward threshold, and the fan control point combination corresponding to the target downward threshold is the second adaptable fan control point combination.

6. The method for controlling a blower of a refrigeration system according to claim 1, wherein Controlling the operation of the fan corresponding to the target - level fan control point combination as described above includes: Determining a target fan control signal according to the target - level fan control point combination; Adjusting the current fan control signal to the target fan control signal based on the Gray - code encoding method.

7. The method for controlling a blower of a refrigeration system according to claim 2, wherein After obtaining the corresponding condenser fan control point combination comparison table, it further includes: According to the environmental parameters and the rising threshold corresponding to each level of fan control point combination, correcting the rising threshold corresponding to each level of fan control point combination to obtain the corrected rising threshold corresponding to each level of fan control point combination; Correcting the falling threshold corresponding to the next - level fan control point combination according to the corrected rising threshold corresponding to the previous - level fan control point combination to obtain the corrected falling threshold corresponding to the next - level fan control point combination; The cooling - down adjustment ability of the previous - level fan control point combination is greater than that of the next - level fan control point combination.

8. The method for controlling a fan of a refrigeration system according to claim 7, wherein, The environmental parameters include the environmental temperature value and the environmental humidity value; The corrected rising threshold corresponding to each level of fan control point combination = the rising threshold corresponding to each level of fan control point combination+K1*(the environmental temperature value - 25)+K2*(the environmental humidity value - 50%); Where K1 is the temperature compensation coefficient and K2 is the humidity compensation coefficient.

9. The method for controlling a fan of a refrigeration system according to claim 7, characterized in that, The corrected falling threshold corresponding to the next - level fan control point combination = the corrected rising threshold corresponding to the previous - level fan control point combination - a preset difference.

10. A fan control device for a refrigeration system, characterized in that, It includes: A target - level fan control point combination determination module, configured to determine a target - level fan control point combination according to the refrigeration temperature parameter of the refrigeration system and the condenser fan control point combination comparison table; An adjustment module, configured to control the operation of the fan corresponding to the target - level fan control point combination according to the target - level fan control point combination to adjust the condensation temperature of the refrigeration system.

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