Heating system fan control method and device

Abstract

The embodiment of the invention discloses a heating system fan control method and device. The heating 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 heating system draught fan control method comprises the steps that according to heating temperature parameters of a heating system and an evaporator draught fan control point position combination comparison table, a target draught fan control point position combination is determined; and according to the target fan control point position combination, a fan corresponding to the target fan control point position combination is controlled to operate, so that the evaporation temperature of the heating system is adjusted. According to the scheme, multi-stage fine adjustment of the heating system can be achieved under the limited fan control point position, and the control precision of the evaporation temperature of the heating system is improved.

Description

Technical Field

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

[0002] Traditional fan control of heating systems 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 number to reduce the hardware complexity and cost of the heating system. However, the heating system using 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 heating system to achieve multi-level fine adjustment of the heating system under limited fan control points and improve the control accuracy of the evaporation temperature of the heating system.

[0004] In a first aspect, the embodiments of the present invention provide a method for controlling a fan of a heating system. The heating 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 heating system includes:

[0006] Determine a target fan control point combination according to the heating temperature parameter of the heating system and the evaporator fan control point combination comparison table;

[0007] Control the fans corresponding to the target fan control point combination to operate according to the target fan control point combination to adjust the evaporation temperature of the heating system.

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

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

[0010] Optionally, the heating temperature parameter includes the current evaporation temperature and the evaporation temperature change trend;

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

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

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

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

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

[0016] Optionally, the evaporation 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 evaporation temperature change trend is the upward trend, obtain the upward threshold corresponding to each level of the fan control point combination according to the evaporator fan control point combination comparison table;

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

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

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

[0022] Screen the next-level fan control point combination corresponding to the fan control point combination with the smallest rank corresponding to the maximum value of the upward thresholds smaller than the current evaporation 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,

[0023] Screen the minimum value of the downward thresholds greater than the current evaporation 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.

[0024] Optionally, controlling the operation of the fan corresponding to the target fan control point combination according to the target fan control point combination includes:

[0025] Determine the target fan control signal according to the target fan control point combination;

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

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

[0028] According to the environmental parameters and the rising threshold corresponding to each level of fan control point combination, correct 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;

[0029] According to the corrected rising threshold corresponding to the upper-level fan control point combination, correct the falling threshold corresponding to the lower-level fan control point combination to obtain the corrected falling threshold corresponding to the lower-level fan control point combination;

[0030] The cooling adjustment ability of the upper-level fan control point combination is less than that of the lower-level fan control point combination.

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

[0032] 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%);

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

[0034] Optionally, 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 - the preset difference.

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

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

[0037] An adjustment module, configured to control the operation of the fan corresponding to the target fan control point combination according to the target fan control point combination to adjust the evaporation temperature of the heating system.

[0038] In an embodiment of the present invention, a target fan control point combination is determined according to a heating temperature parameter of a heating system and a comparison table of evaporator fan control point combinations; according to the target fan control point combination, the fan corresponding to the target fan control point combination is controlled to operate, so as to adjust the evaporation temperature of the heating system. Thus, this solution can achieve multi-level fine adjustment of the heating system by adapting a suitable level of fan control point combination under limited fan control points, and improve the control accuracy of the evaporation temperature of the heating system. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly introduced below. 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 according to these drawings.

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

[0041] Figure 2 It is a schematic flowchart of steps for determining a target 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 heating 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 technical solutions in the embodiments of the present invention will be clearly and completely described below 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 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 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 such data used can be interchanged under appropriate circumstances, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. 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 blower of a heating system. The method for controlling a blower of a heating system is applied to a heating system that adjusts the evaporation temperature through a blower. Among them, the heating system includes 4 blower control points. The first blower control point controls one blower, the second blower control point controls at most two blowers, the third blower control point controls at most four blowers, and the fourth blower control point controls at most nine blowers.

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

[0047]

[0048]

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

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

[0051] S110. Determine a target blower control point combination according to the heating temperature parameter of the heating system and the comparison table of the evaporator blower control point combination.

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

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

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

[0055] Among them, each fan control point controls at least one fan, and 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 achieve 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 heating system is 8 and the number of fan control points is 4, the first fan control point A controls 1 fan, the second fan control point B controls 2 fans, the third fan control point C controls 4 fans, and the fourth fan control point D controls 1 fan. At this time, the fan control point combinations include: A, B, AB, C, AC, BC, ABC, ABCD. The eighth - level fan control point combination A can control 1 fan to operate, the seventh - level fan control point combination B can control 2 fans to operate, the sixth - level fan control point combination AB can control 3 fans to operate, the fifth - level fan control point combination C can control 4 fans to operate, the fourth - level fan control point combination AC can control 5 fans to operate, the third - level fan control point combination BC can control 6 fans to operate, the second - level fan control point combination ABC can control 7 fans to operate, and the first - level fan control point combination ABCD can control 8 fans to operate. Thus, the above - mentioned heating system can achieve 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 fan control point combination is determined according to a heating temperature parameter of a heating system and an evaporator fan control point combination comparison table; according to the target fan control point combination, the fan corresponding to the target fan control point combination is controlled to operate, so as to adjust the evaporation temperature of the heating system. Thus, this solution can achieve multi-level fine adjustment of the heating system by adapting a suitable level of fan control point combination under limited fan control points, and improve the control accuracy of the evaporation temperature of the heating system.

[0058] Based on the above embodiment, optionally, before determining the target fan control point combination, it includes:

[0059] Obtain the corresponding evaporator fan control point combination comparison table according to the number of fans.

[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, an evaporator fan control point combination comparison table including various levels of fan control point combinations can be obtained in advance, so as to subsequently screen a suitable level of fan control point combination to adjust the evaporation temperature of the heating system.

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

[0062]

[0063]

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

[0065] Based on the above embodiment, optionally, the heating temperature parameter includes the current evaporation temperature and the evaporation temperature change trend.

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

[0067] Based on the above embodiment, optionally, Figure 2 is a schematic flow chart of the steps for determining a target fan control point combination provided by an embodiment of the present invention. As Figure 2 shown, the steps for determining the target fan control point combination are described:

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

[0069] Among them, the evaporation 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 evaporation temperature change trend is an upward trend, obtain the upward threshold corresponding to each level of fan control point combination according to the evaporator fan control point combination comparison table.

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

[0072] Exemplarily, if the heating 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 evaporator fan control point combination comparison table shown in Table 2, the set value corresponding to each level of fan control point combination can be obtained.

[0073] When the evaporation temperature change trend is an upward trend, obtain the upward threshold corresponding to the fan control point combination A as 22.6 according to the evaporator fan control point combination comparison table, the upward threshold corresponding to the fan control point combination B as 20.2, the upward threshold corresponding to the fan control point combination AB as 20.2, the upward threshold corresponding to the fan control point combination C as 17.8, the upward threshold corresponding to the fan control point combination AC as 17.8, the upward threshold corresponding to the fan control point combination BC as 15.4, and the upward threshold corresponding to the fan control point combination ABC as 13.2.

[0074] When the evaporation temperature change trend is a downward trend, obtain the downward threshold corresponding to the fan control point combination A as 16.5 according to the evaporator fan control point combination comparison table, the downward threshold corresponding to the fan control point combination B as 14.1, the downward threshold corresponding to the fan control point combination AB as 11.7, the downward threshold corresponding to the fan control point combination C as 11.7, the downward threshold corresponding to the fan control point combination AC as 9.3, the downward threshold corresponding to the fan control point combination BC as 9.3, the downward threshold corresponding to the fan control point combination ABC as 6.9, and the downward threshold corresponding to the fan control point combination ABCD as 4.7.

[0075] S220. Determine the adapted fan control point combination according to the current evaporation 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 next-level fan control point combination corresponding to the rising threshold with the smallest rank among the maximum values of the rising thresholds lower than the current evaporation 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 minimum value of the falling thresholds higher than the current evaporation 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 fan control point combination.

[0081] S240. If the number of adapted fan control point combinations is greater than 1, determine the target fan control point combination according to the cooling 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 cooling adjustment ability is the target fan control point combination, or the second adapted fan control point combination with the weakest cooling adjustment ability is the target fan control point combination.

[0083] Exemplarily, the heating system includes 8 fans, and the number of fans that each fan control point can drive refers to Table 1. The evaporation temperature change trend is an upward trend. If the current evaporation temperature is 21°C, then the target upward threshold at this time is 17.8 (the minimum of the upward thresholds greater than the current evaporation temperature is 20.2, and the upward threshold 17.8 corresponding to the fan control point combination C, which is the next level of the fan control point combination AB with the smallest level corresponding to the upward threshold 20.2, is the target upward threshold). The fan control point combinations corresponding to the target upward threshold are the first adapted fan control point combination C and the first adapted fan control point combination AC. According to the cooling adjustment capabilities of the first adapted fan control point combination C and the first adapted fan control point combination AC, the first adapted fan control point combination AC with strong cooling ability can be selected as the target 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 C can control 4 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 AC is greater than that of the first adapted fan control point combination C.

[0084] The heating system includes 8 fans, and the number of fans that each fan control point can drive refers to Table 1. The evaporation temperature change trend is an upward trend. If the current evaporation temperature is 18°C, then the target upward threshold at this time is 15.4, and the fan control point combination corresponding to the target upward threshold is the first adapted fan control point combination BC. 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 BC is the target fan control point combination.

[0085] The heating system includes 8 fans, and the number of fans that each fan control point can drive refers to Table 1. The evaporation temperature change trend is a downward trend. If the current evaporation temperature is 10°C, then the target downward threshold at this time is 11.7, and the fan control point combinations corresponding to the target downward threshold are the second adapted fan control point combination C and the second adapted fan control point combination AB. According to the cooling adjustment capabilities of the second adapted fan control point combination C and the second adapted fan control point combination AB, the second adapted fan control point combination AB with weak cooling ability can be selected as the target 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 C can control 4 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 C is greater than that of the second adapted fan control point combination AB.

[0086] The heating system includes 8 fans, and the number of fans that each fan control point can drive refers to Table 1. The evaporation temperature change trend is a downward trend. If the current evaporation temperature is 12 °C, then the target decrease threshold at this time is 14.1, and the fan control point combination corresponding to the target decrease threshold is the second adapted fan control point combination B. 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 B is the target fan control point combination. On the basis of the above embodiments, optionally, according to the target fan control point combination, controlling the fans corresponding to the target fan control point combination to operate includes:

[0087] Determine a target fan control signal according to the target fan control point combination.

[0088] Among them, each fan control point combination corresponds to a target fan control signal. Exemplarily, the heating 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.

[0089] Adjust the current fan control signal to the target fan control signal based on the Gray code encoding method.

[0090] Among them, adjusting the current fan control signal to the target fan control signal based on the Gray code encoding method, that is, only changing the data signal corresponding to 1 fan control point each time the switch is made, can achieve staggered control of the fan control points and reduce the risk of signal conflict.

[0091] Exemplarily, the current fan control signal is 1010, and the target fan control signal is 0111. Based on the Gray code encoding method, the current fan control signal 1010 is first adjusted to 0010, then adjusted to 0110, and then adjusted to the target fan control signal 0111.

[0092] Based on the above embodiments, optionally, after obtaining the corresponding evaporator fan control point combination comparison table, it further includes:

[0093] According to the environmental parameters and the rising threshold corresponding to each level of fan control point combination, correct 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.

[0094] Among them, the environmental parameters include the environmental temperature value and the environmental humidity value;

[0095] 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.

[0096] According to the corrected rising threshold corresponding to the upper-level fan control point combination, correct the falling threshold corresponding to the lower-level fan control point combination to obtain the corrected falling threshold corresponding to the lower-level fan control point combination.

[0097] 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 - the preset difference. Exemplarily, Figure 2 the preset difference in [] is 8.5.

[0098] The cooling adjustment ability of the upper-level fan control point combination is less 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 less than the number of fans controlled by the lower-level fan control point combination.

[0099] Figure 3 FIG. is a schematic structural diagram of a fan control device for a heating system provided by an embodiment of the present invention. As Figure 3 shown, the fan control device for the heating system includes:

[0100] A target fan control point combination determination module 310, configured to determine a target fan control point combination according to the heating temperature parameter of the heating system and the evaporator fan control point combination comparison table;

[0101] The adjustment module 320 is configured to control the operation of the fans corresponding to the target fan control point combination according to the target fan control point combination, so as to adjust the evaporation temperature of the heating system.

[0102] In the embodiment of the present invention, the target fan control point combination determination module 310 determines the target fan control point combination according to the heating temperature parameter of the heating system and the evaporator fan control point combination comparison table; the adjustment module 320 controls the operation of the fans corresponding to the target fan control point combination according to the target fan control point combination, so as to adjust the evaporation temperature of the heating system. Thus, this solution can achieve multi-level fine adjustment of the heating system by adapting the appropriate level of fan control point combination under limited fan control points, and improve the control accuracy of the evaporation temperature of the heating system.

[0103] Optionally, based on the above embodiment, the heating system fan control device further includes:

[0104] An acquisition module, configured to acquire the corresponding evaporator fan control point combination comparison table according to the number of fans.

[0105] Optionally, based on the above embodiment, the heating temperature parameter includes the current evaporation temperature and the evaporation temperature change trend;

[0106] The target fan control point combination determination module includes:

[0107] A set value determination unit, configured to acquire the set value corresponding to each level of fan control point combination according to the evaporation temperature change trend and the evaporator fan control point combination comparison table;

[0108] An adapted fan control point combination determination unit, configured to determine the adapted fan control point combination according to the current evaporation temperature and the set value corresponding to each level of fan control point combination;

[0109] A target 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 fan control point combination; if the number of adapted fan control point combinations is greater than 1, determine the target fan control point combination according to the cooling adjustment ability of each level of adapted fan control point combination.

[0110] Optionally, based on the above embodiment, the evaporation temperature change trend includes an upward trend and a downward trend; the set value includes an upward threshold and a downward threshold;

[0111] Optionally, based on the above embodiment, the set value determination unit is specifically configured to:

[0112] If the evaporation temperature change trend is an upward trend, obtain the rising threshold corresponding to each level of fan control point combination according to the evaporator fan control point combination comparison table;

[0113] If the evaporation temperature change trend is a downward trend, obtain the falling threshold corresponding to each fan control point combination according to the evaporator fan control point combination comparison table.

[0114] 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;

[0115] Based on the above embodiments, optionally, the adapted fan control point combination determining unit is specifically configured to:

[0116] Screen the rising threshold corresponding to the next-level fan control point combination with the smallest rank corresponding to the maximum value among the rising thresholds smaller than the current evaporation 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,

[0117] Screen the minimum value among the falling thresholds greater than the current evaporation 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.

[0118] Based on the above embodiments, optionally, the adjustment module includes:

[0119] A target fan control signal determining unit, configured to determine a target fan control signal according to the target fan control point combination;

[0120] 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.

[0121] Based on the above embodiments, optionally, the heating system fan control device further includes:

[0122] A first correction module, configured to correct the rising threshold corresponding to each level of fan control point combination according to the environmental parameters and 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;

[0123] A second correction module, configured to correct 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;

[0124] The cooling adjustment ability of the previous-level fan control point combination is less than that of the next-level fan control point combination.

[0125] It should be understood that the various forms of processes shown above can be used, with steps 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.

[0126] The above specific embodiments do not constitute a limitation to 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 principles 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 heating system, characterized in that, The heating 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; The method for controlling the fans of the heating system includes: Determine the target fan control point combination according to the heating temperature parameter of the heating system and the evaporator fan control point combination comparison table; Control the fans corresponding to the target fan control point combination to operate according to the target fan control point combination, so as to adjust the evaporation temperature of the heating system.

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

3. The method for controlling a blower of a heating system according to claim 1, wherein, The heating temperature parameter includes the current evaporation temperature and the evaporation temperature change trend; The step of determining the target fan control point combination includes: Obtain the set value corresponding to each level of the fan control point combination according to the evaporation temperature change trend and the evaporator fan control point combination comparison table; Determine the adaptable fan control point combination according to the current evaporation 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 fan control point combination; If the number of the adaptable fan control point combinations is greater than 1, then determine the target 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 heating system according to claim 3, wherein The evaporation 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 evaporation temperature change trend is the upward trend, obtain the upward threshold corresponding to each level of the fan control point combination according to the evaporator fan control point combination comparison table; If the evaporation temperature change trend is the downward trend, obtain the downward threshold corresponding to each fan control point combination according to the evaporator fan control point combination comparison table.

5. The method for controlling the fan of the heating system according to claim 4, characterized in that, 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: Screen the maximum value of the upward thresholds smaller than the current evaporation temperature, and the next-level fan control point combination corresponding to the fan control point combination with the smallest level corresponding to the maximum value is 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, Screen the minimum value of the downward thresholds greater than the current evaporation 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 heating system according to claim 1, characterized in that, Controlling the fans corresponding to the target fan control point combination according to the target fan control point combination includes: Determine the target fan control signal according to the target fan control point combination; Adjust the current fan control signal to the target fan control signal based on the Gray code encoding method.

7. The method for controlling the fan of the heating system according to claim 2, wherein, After obtaining the corresponding evaporator 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, correct 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; According to the corrected rising threshold corresponding to the previous level of fan control point combination, correct the falling threshold corresponding to the next level of fan control point combination to obtain the corrected falling threshold corresponding to the next level of fan control point combination; The cooling adjustment ability of the previous level of fan control point combination is less than that of the next level of fan control point combination.

8. The method for controlling a blower of a heating 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%); Wherein, K1 is the temperature compensation coefficient and K2 is the humidity compensation coefficient.

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

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

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