Energy-saving control method and control device, air conditioning system and storage medium

Abstract

The present disclosure provides an energy-saving control method and control device, an air conditioning system, and a storage medium, relating to the field of control. The energy-saving control method includes: detecting indoor temperature and indoor humidity; and if the indoor temperature is within a first preset range and the indoor humidity is within a second preset range, reducing the speed of the indoor fan at a preset period.

Description

Technical Field

[0001] The present disclosure relates to the field of control, and in particular to an energy-saving control method and control device, an air-conditioning system, and a storage medium. Background Art

[0002] To improve people's comfort, air conditioning systems adjust the temperature and humidity of the environment. During the dehumidification and reheating process, air conditioning systems usually use a process of first dehumidifying and cooling, and then heating and raising the temperature. Summary of the Invention

[0003] Through research, the inventors found that in the relevant technologies of dehumidification and reheating, since the air-conditioning system usually adopts a process of first dehumidifying and cooling, and then heating and heating, when the air volume on the indoor side of the unit is too large, the reheat capacity of the air-conditioning unit will be far greater than the sensible heat load of the building, and the cooling capacity will be far greater than the latent heat load of the building, thereby causing serious energy waste.

[0004] Accordingly, the present disclosure provides an energy-saving control solution that can significantly reduce the cooling capacity and reheating capacity of the air-conditioning unit while meeting the indoor heat and humidity load, thereby improving the dehumidification and reheating energy efficiency of the air-conditioning unit.

[0005] According to a first aspect of an embodiment of the present disclosure, an energy-saving control method is provided, including: detecting indoor temperature and indoor humidity; if the indoor temperature is within a first preset range and the indoor humidity is within a second preset range, reducing the speed of the indoor fan at a preset period.

[0006] In some embodiments, the lower limit of the first preset range is the difference between the indoor target temperature and the preset temperature deviation; the upper limit of the first preset range is the sum of the indoor target temperature and the preset temperature deviation; the lower limit of the second preset range is the difference between the indoor target humidity and the preset humidity deviation; the upper limit of the second preset range is the sum of the indoor target humidity and the preset humidity deviation.

[0007] In some embodiments, reducing the speed of the indoor fan in a preset cycle includes: determining whether the evaporation temperature is not less than a first temperature threshold; if the evaporation temperature is not less than the first temperature threshold, reducing the speed of the indoor fan in a preset first cycle.

[0008] In some embodiments, the evaporation temperature is the inlet pipe temperature of the indoor heat exchanger in the evaporating state, or the low-pressure saturation temperature of the air-conditioning system.

[0009] In some embodiments, reducing the speed of the indoor fan in a preset first cycle includes: determining whether the current output of the compressor is not less than the output threshold; if the current output of the compressor is not less than the output threshold, reducing the speed of the indoor fan according to the first cycle.

[0010] In some embodiments, reducing the speed of the indoor fan according to the first cycle includes: determining whether the load rate of the electric heater is not less than the load rate threshold; if the load rate of the electric heater is not less than the load rate threshold, reducing the speed of the indoor fan according to the first cycle.

[0011] In some embodiments, the load rate of the electric heater is a result of dividing the current power of the electric heater by the full load power of the electric heater.

[0012] In some embodiments, reducing the speed of the indoor fan according to the first cycle includes: if the opening of the electronic expansion valve connected to the indoor heat exchanger in the condensing state is not less than the first opening threshold, then reducing the speed of the indoor fan according to the first cycle.

[0013] In some embodiments, reducing the speed of the indoor fan according to the first cycle includes: within a continuously preset second cycle, if the speed of the outdoor fan used to control the heat exchange of the outdoor heat exchanger in the condensing state is not greater than the speed threshold, then the speed of the indoor fan is reduced according to the first cycle.

[0014] In some embodiments, reducing the speed of the indoor fan according to the first cycle includes: within a continuous preset second cycle, if the opening of the electronic expansion valve connected to the outdoor heat exchanger in the condensing state is not greater than the second opening threshold, then reducing the speed of the indoor fan according to the first cycle.

[0015] In some embodiments, reducing the speed of the indoor fan according to a preset first cycle includes: within a continuous preset third cycle, if the difference between the outlet temperature and the return air outlet temperature of the indoor fan is not greater than a second temperature threshold, then reducing the speed of the indoor fan according to the first cycle.

[0016] According to a second aspect of an embodiment of the present disclosure, an energy-saving control device is provided, including: a first processing module, configured to detect indoor temperature and indoor humidity; a second processing module, configured to reduce the speed of the indoor fan at a preset period if the indoor temperature is within a first preset range and the indoor humidity is within a second preset range.

[0017] According to a third aspect of an embodiment of the present disclosure, an energy-saving control device is provided, comprising: a memory configured to store instructions; a processor coupled to the memory, the processor being configured to execute a method as described in any of the above embodiments based on the instructions stored in the memory.

[0018] According to a fourth aspect of an embodiment of the present disclosure, there is provided an air-conditioning system, comprising: an energy-saving control device as described in any one of the above embodiments.

[0019] According to a fifth aspect of an embodiment of the present disclosure, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores computer instructions, and when the instructions are executed by a processor, the method described in any of the above embodiments is implemented.

[0020] Other features and advantages of the present disclosure will become apparent from the following detailed description of exemplary embodiments of the present disclosure with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0022] Figure 1 This is a structural diagram of an air conditioning system according to an embodiment of the present disclosure;

[0023] Figure 2 This is a structural diagram of an air conditioning system according to another embodiment of the present disclosure;

[0024] Figure 3 A schematic flow chart of an energy-saving control method according to an embodiment of the present disclosure;

[0025] Figure 4 This is a flow chart of an energy-saving control method according to another embodiment of the present disclosure;

[0026] Figure 5 This is a flow chart of an energy-saving control method according to another embodiment of the present disclosure;

[0027] Figure 6 This is a flow chart of an energy-saving control method according to another embodiment of the present disclosure;

[0028] Figure 7 This is a structural diagram of an energy-saving control device according to an embodiment of the present disclosure;

[0029] Figure 8 This is a structural diagram of an energy-saving control device according to another embodiment of the present disclosure;

[0030] Figure 9 The figure is a schematic structural diagram of an air conditioning system according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present disclosure and its application or use. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present disclosure.

[0032] Unless specifically stated otherwise, the relative arrangement of components and steps, the numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present disclosure.

[0033] At the same time, it should be understood that for the convenience of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship.

[0034] Technologies, methods and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, such technologies, methods and equipment should be considered part of the authorization specification.

[0035] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0036] It should be noted that like reference numerals and letters refer to like items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0037] Figure 1 This is a schematic diagram of the structure of an air conditioning system according to an embodiment of the present disclosure. Figure 1 In FIG, the air conditioning system includes an indoor unit 100 and an outdoor unit 200. Reference numeral 1 denotes a compressor, reference numeral 2 denotes a valve assembly, reference numeral 3 denotes a first indoor heat exchanger, reference numeral 4 denotes a second indoor heat exchanger, reference numeral 5 denotes an electronic expansion valve connected to the first indoor heat exchanger 3, reference numeral 6 denotes an electronic expansion valve connected to the second indoor heat exchanger 4, reference numerals 7-9 denote shut-off valves, and reference numeral 10 denotes an indoor fan. Reference numeral 11 denotes a first outdoor heat exchanger, reference numeral 12 denotes a second outdoor heat exchanger, reference numeral 13 denotes an outdoor fan for controlling the heat exchange rate of the first outdoor heat exchanger 11, reference numeral 14 denotes an outdoor fan for controlling the heat exchange rate of the second outdoor heat exchanger 12, reference numeral 15 denotes an electronic expansion valve connected to the first outdoor heat exchanger 11, reference numeral 16 denotes an electronic expansion valve connected to the second outdoor heat exchanger 12, and reference numerals 17-20 denote shut-off valves.

[0038] It should be noted that, to facilitate temperature and humidity control, one of the first indoor heat exchanger 3 and the second indoor heat exchanger 4 operates in the evaporation state, while the other operates in the condensation state. Furthermore, one of the first outdoor heat exchanger 11 and the second outdoor heat exchanger 12 operates in the evaporation state, while the other operates in the condensation state. By controlling the valve assembly 2, the first indoor heat exchanger 3, the second indoor heat exchanger 4, the first outdoor heat exchanger 11, and the second outdoor heat exchanger 12 can be switched between the evaporation and condensation states at will.

[0039] For example, it is assumed that the first indoor heat exchanger 3 operates in an evaporating state, the second indoor heat exchanger 4 operates in a condensing state, the first outdoor heat exchanger 11 operates in an evaporating state, and the second outdoor heat exchanger 12 operates in a condensing state.

[0040] Figure 2 This is a structural diagram of an air conditioning system according to another embodiment of the present disclosure. Figure 2 and Figure 1 The difference is that in Figure 2 In the illustrated embodiment, the second indoor heat exchanger 4 and the electronic expansion valve 6 communicating with the second indoor heat exchanger 4 are replaced by an electric heater 21 .

[0041] Figure 3 The following is a flow chart of an energy-saving control method according to an embodiment of the present disclosure. In some embodiments, the following energy-saving control method is executed by an energy-saving control device.

[0042] In step 301, the indoor temperature and indoor humidity are detected.

[0043] In step 302, if the indoor temperature is within a first preset range and the indoor humidity is within a second preset range, the speed of the indoor fan is reduced at a preset cycle.

[0044] In some embodiments, if the indoor temperature T ID-Amb Satisfying formula (1), indoor humidity RH ID-Amb If formula (2) is satisfied, the speed of the indoor fan is reduced at a preset period.

[0045] T Set -T deviation ≤T ID-Amb ≤T Set +T deviation (1)

[0046] RH Set -RH deviation ≤RH ID-Amb ≤RH Set +RH deviation (2)

[0047] Among them, T Set is the indoor target temperature, Tdeviation is the preset temperature deviation, RH Set is the indoor target humidity, RH deviation is the preset humidity deviation.

[0048] In the energy-saving control method provided in the above-mentioned embodiment of the present disclosure, when both the indoor temperature and indoor humidity are within a preset range, the speed of the indoor fan is reduced at a preset cycle. This significantly reduces the cooling capacity and reheating capacity of the air conditioning unit while meeting the indoor heat and humidity load, thereby improving the dehumidification and reheating energy efficiency of the air conditioning unit.

[0049] In some embodiments, the step of reducing the speed of the indoor fan in a preset period includes: determining whether the evaporation temperature is not less than a first temperature threshold; if the evaporation temperature is not less than the first temperature threshold, reducing the speed of the indoor fan in a preset first period.

[0050] For example, the evaporation temperature is the inlet pipe temperature T of the indoor heat exchanger in the evaporation state. 21 , or the low pressure saturation temperature T of the air conditioning system LPS .

[0051] It should be noted that if the evaporation temperature is too low, for example, lower than the indoor air dew point temperature and below 0°C, the evaporator will frost. The worsening of frost will cause the air circulation area of ​​the evaporator to decrease, the heat transfer coefficient to decrease, and the evaporator performance to decline, which may lead to imbalance of indoor temperature and humidity.

[0052] For example, if the following formula (3) or (4) is satisfied, the rotation speed of the indoor fan is reduced in a preset first cycle.

[0053] T LPS ≥T1 (3)

[0054] T 21 ≥T1 (4)

[0055] Wherein, T1 is the first temperature threshold, for example, T1 = -2°C.

[0056] In some embodiments, the above-mentioned reduction of the speed of the indoor fan in a preset first cycle includes: determining whether the current output of the compressor is not less than the output threshold; if the current output of the compressor is not less than the output threshold, reducing the speed of the indoor fan according to the first cycle.

[0057] For example, the output of the compressor is determined according to the frequency of the compressor. If the following formula (5) is satisfied, it indicates that the compressor has a large energy-saving potential, and the speed of the indoor fan is reduced according to the first cycle.

[0058] F Comp-T ≥F Comp-V1 (5)

[0059] Among them, F Comp-T is the current frequency of the compressor, F Comp-V1 is the compressor frequency threshold.

[0060] In some embodiments, the above-mentioned reduction of the speed of the indoor fan according to the first cycle includes: determining whether the load rate of the electric heater is not less than the load rate threshold; if the load rate of the electric heater is not less than the load rate threshold, the speed of the indoor fan is reduced according to the first cycle.

[0061] For example, the load rate of the electric heater is the result of dividing the current power of the electric heater by the full load power of the electric heater.

[0062] It should be noted that if the following formula (6) is satisfied, it indicates that there is still energy-saving potential, and the speed of the indoor fan can be reduced in the first cycle. Otherwise, it means that the power of the electric heater is low, the cooling capacity is wasted, and the energy-saving effect is limited, so there is no need to reduce the speed of the indoor fan.

[0063]

[0064] in, is the load rate of the electric heater, is the load rate threshold.

[0065] Figure 4 1 is a flow chart of an energy-saving control method according to another embodiment of the present disclosure. In some embodiments, the following energy-saving control method is executed by an energy-saving control device.

[0066] In step 401, variable air volume energy-saving control is enabled.

[0067] In step 402, the indoor temperature and indoor humidity are detected.

[0068] In step 403, it is determined whether the indoor temperature is within a first preset range and whether the indoor humidity is within a second preset range.

[0069] If the indoor temperature is within the first preset range and the indoor humidity is within the second preset range, step 404 is executed; otherwise, the process returns to step 402 .

[0070] For example, the above formulas (1) and (2) are used to determine whether the indoor temperature is within a first preset range and whether the indoor humidity is within a second preset range.

[0071] In step 404 , it is determined whether the evaporation temperature is not less than a first temperature threshold.

[0072] For example, the above formula (3) or formula (4) is used to determine whether the evaporation temperature is not less than the first temperature threshold.

[0073] If the evaporation temperature is not less than the first temperature threshold, execute step 405; otherwise, return to step 402.

[0074] In step 405 , it is determined whether the current output of the compressor is not less than an output threshold.

[0075] For example, the above formula (5) is used to determine whether the current output of the compressor is not less than the output threshold.

[0076] If the current output of the compressor is not less than the output threshold, step 406 is executed; otherwise, the process returns to step 402 .

[0077] In step 406 , it is determined whether the load rate of the electric heater is not less than a load rate threshold.

[0078] For example, the above formula (6) is used to determine whether the load rate of the electric heater is not less than the load rate threshold.

[0079] If the load rate of the electric heater is not less than the load rate threshold, step 407 is executed; otherwise, the process returns to step 402 .

[0080] In step 407, the rotation speed of the indoor fan is reduced in a first cycle.

[0081] Figure 5 FIG2 is a flow chart of an energy-saving control method according to another embodiment of the present disclosure. In some embodiments, the following energy-saving control method is executed by an energy-saving control device.

[0082] In step 501, variable air volume energy-saving control is enabled.

[0083] In step 502, the indoor temperature and indoor humidity are detected.

[0084] In step 503, it is determined whether the indoor temperature is within a first preset range and whether the indoor humidity is within a second preset range.

[0085] If the indoor temperature is within the first preset range and the indoor humidity is within the second preset range, step 504 is executed; otherwise, the process returns to step 502 .

[0086] For example, the above formulas (1) and (2) are used to determine whether the indoor temperature is within a first preset range and whether the indoor humidity is within a second preset range.

[0087] In step 504 , it is determined whether the evaporation temperature is not less than a first temperature threshold.

[0088] For example, the above formula (3) or formula (4) is used to determine whether the evaporation temperature is not less than the first temperature threshold.

[0089] If the evaporation temperature is not less than the first temperature threshold, execute step 505; otherwise, return to step 502.

[0090] In step 505 , it is determined whether the current output of the compressor is not less than an output threshold.

[0091] For example, the above formula (5) is used to determine whether the current output of the compressor is not less than the output threshold.

[0092] If the current output of the compressor is not less than the output threshold, execute step 506 , 507 or 508 ; otherwise, return to step 502 .

[0093] In step 506 , it is determined whether a first condition is met, that is, whether the opening of the electronic expansion valve connected to the indoor heat exchanger in the condensing state is not less than a first opening threshold.

[0094] It should be noted that if the reheating amount of the indoor heat exchanger in the condensing state is too large, the refrigerant flow rate inside it will increase, and therefore the opening of the corresponding electronic expansion valve will also increase.

[0095] For example, if the following formula (7) is satisfied, it indicates that the speed of the indoor fan needs to be reduced.

[0096] EXV 6-T ≥EXV V1 (7)

[0097] Among them, EXV 6-T EXV is the opening of the electronic expansion valve connected to the indoor heat exchanger in the condensing state. V1 is the first opening threshold.

[0098] If the opening degree of the electronic expansion valve connected to the indoor heat exchanger in the condensing state is not less than the first opening degree threshold, step 509 is executed; otherwise, the process returns to step 502 .

[0099] In step 507 , it is determined whether the second condition is met, that is, whether the speed of the outdoor fan for controlling the heat exchange of the outdoor heat exchanger in the condensing state is not greater than the speed threshold within the continuously preset second period.

[0100] It's important to note that the primary function of the outdoor heat exchanger operating in condensing mode is to divert reheat from the indoor reheater. If the reheater reheat rate decreases while the compressor output remains constant, the heat transfer rate of the outdoor heat exchanger operating in condensing mode increases. Conversely, if the reheater reheat rate increases, the heat transfer rate of the outdoor heat exchanger operating in condensing mode decreases. Therefore, the status of the indoor reheater can be indirectly reflected by controlling the outdoor fan's heat transfer rate in the condensing outdoor heat exchanger.

[0101] For example, if the following formula (8) is satisfied, it indicates that the speed of the indoor fan needs to be reduced.

[0102] Fan 14-T ≤Fan V1 (8)

[0103] Among them, Fan 14-T The speed of the outdoor fan used to control the heat exchange of the outdoor heat exchanger in the condensing state is Fan V1 is the speed threshold.

[0104] If the speed of the outdoor fan for controlling the heat exchange of the outdoor heat exchanger in the condensing state is not greater than the speed threshold within the continuous preset second cycle, step 509 is executed; otherwise, the process returns to step 502 .

[0105] In step 508 , it is determined whether a third condition is met, that is, whether the opening of the electronic expansion valve connected to the outdoor heat exchanger in the condensing state is not greater than a second opening threshold within a continuous preset second period.

[0106] As mentioned above, the primary function of the outdoor heat exchanger operating in condensing mode is to divert reheat from the indoor reheater. If the reheat capacity of the outdoor heat exchanger decreases while the compressor output remains constant, the heat transfer rate of the outdoor heat exchanger operating in condensing mode increases. Conversely, if the reheat capacity of the outdoor heat exchanger increases, the heat transfer rate of the outdoor heat exchanger operating in condensing mode decreases. Therefore, controlling the opening of the electronic expansion valve connected to the outdoor heat exchanger in condensing mode indirectly reflects the status of the indoor reheater.

[0107] For example, if the following formula (9) is satisfied, it indicates that the speed of the indoor fan needs to be reduced.

[0108] EXV 16-T ≤EXV V2 (9)

[0109] Among them, EXV 16-T EXV is the opening of the electronic expansion valve connected to the outdoor heat exchanger in the condensing state. V2 is the second opening threshold.

[0110] If the opening degree of the electronic expansion valve connected to the outdoor heat exchanger in the condensing state is not greater than the second opening degree threshold value within the continuous preset second cycle, step 509 is executed; otherwise, the process returns to step 502 .

[0111] In step 509, the rotation speed of the indoor fan is reduced in a first cycle.

[0112] Figure 6 FIG2 is a flow chart of an energy-saving control method according to another embodiment of the present disclosure. In some embodiments, the following energy-saving control method is executed by an energy-saving control device.

[0113] In step 601, variable air volume energy-saving control is enabled.

[0114] In step 602, the indoor temperature and indoor humidity are detected.

[0115] In step 603, it is determined whether the indoor temperature is within a first preset range and whether the indoor humidity is within a second preset range.

[0116] If the indoor temperature is within the first preset range and the indoor humidity is within the second preset range, step 604 is executed; otherwise, the process returns to step 602 .

[0117] For example, the above formulas (1) and (2) are used to determine whether the indoor temperature is within a first preset range and whether the indoor humidity is within a second preset range.

[0118] In step 604 , it is determined whether the evaporation temperature is not less than a first temperature threshold.

[0119] For example, the above formula (3) or formula (4) is used to determine whether the evaporation temperature is not less than the first temperature threshold.

[0120] If the evaporation temperature is not less than the first temperature threshold, execute step 605; otherwise, return to step 602.

[0121] In step 605, it is determined whether the fourth condition is satisfied, that is, whether the difference between the outlet temperature of the indoor fan and the return air outlet temperature is not greater than the second temperature threshold value within the third consecutive preset period.

[0122] It should be noted that if the difference between the outlet temperature of the indoor fan and the return air outlet temperature is not greater than the second temperature threshold, it means that the current cooling capacity and reheating capacity of the air-conditioning unit are close, and the dehumidification latent heat is much smaller than the cooling capacity or heating capacity. In this case, the indoor fan speed needs to be reduced.

[0123] For example, if the following formula (10) is satisfied, it indicates that the speed of the indoor fan needs to be reduced.

[0124] T 10 -T ID-Amb ≤T2 (10)

[0125] Among them, T 10 is the outlet temperature of the indoor fan, T ID-Amb is the return air outlet temperature of the indoor fan, and T2 is the second temperature threshold.

[0126] If the difference between the air outlet temperature of the indoor fan and the return air outlet temperature is less than the second temperature threshold, step 606 is executed; otherwise, the process returns to step 602.

[0127] In step 606, the rotation speed of the indoor fan is reduced in a first cycle.

[0128] Figure 7FIG. 1 is a schematic diagram of the structure of an energy-saving control device according to an embodiment of the present disclosure. Figure 7 As shown, the energy-saving control device includes a first processing module 71 and a second processing module 72 .

[0129] The first processing module 71 is configured to detect indoor temperature and indoor humidity.

[0130] The second processing module 72 is configured to reduce the speed of the indoor fan at a preset period if the indoor temperature is within a first preset range and the indoor humidity is within a second preset range.

[0131] In some embodiments, the lower limit of the first preset range is the difference between the indoor target temperature and the preset temperature deviation, the upper limit of the first preset range is the sum of the indoor target temperature and the preset temperature deviation, the lower limit of the second preset range is the difference between the indoor target humidity and the preset humidity deviation, and the upper limit of the second preset range is the sum of the indoor target humidity and the preset humidity deviation.

[0132] In some embodiments, the second processing module 72 determines whether the evaporation temperature is not less than the first temperature threshold during the process of reducing the speed of the indoor fan in a preset cycle. If the evaporation temperature is not less than the first temperature threshold, the speed of the indoor fan is reduced in a preset first cycle.

[0133] For example, the evaporation temperature is the inlet pipe temperature of an indoor heat exchanger in an evaporating state, or the low-pressure saturation temperature of an air-conditioning system.

[0134] In some embodiments, when the second processing module 72 reduces the speed of the indoor fan in a preset first cycle, it determines whether the current output of the compressor is not less than the output threshold. If the current output of the compressor is not less than the output threshold, the speed of the indoor fan is reduced according to the first cycle.

[0135] In some embodiments, the second processing module 72 reduces the speed of the indoor fan according to the first cycle, including: determining whether the load rate of the electric heater is not less than the load rate threshold; if the load rate of the electric heater is not less than the load rate threshold, reducing the speed of the indoor fan according to the first cycle.

[0136] For example, the load rate of the electric heater is the result of dividing the current power of the electric heater by the full load power of the electric heater.

[0137] In some embodiments, the second processing module 72 reduces the speed of the indoor fan according to the first cycle, including: if the opening of the electronic expansion valve connected to the indoor heat exchanger in the condensing state is not less than the first opening threshold, the speed of the indoor fan is reduced according to the first cycle.

[0138] In some embodiments, the second processing module 72 reduces the speed of the indoor fan according to the first cycle, including: within a continuous preset second cycle, if the speed of the outdoor fan used to control the heat exchange of the outdoor heat exchanger in the condensing state is not greater than the speed threshold, the speed of the indoor fan is reduced according to the first cycle.

[0139] In some embodiments, the second processing module 72 reduces the speed of the indoor fan according to the first cycle, including: within a continuous preset second cycle, if the opening of the electronic expansion valve connected to the outdoor heat exchanger in the condensing state is not greater than the second opening threshold, the speed of the indoor fan is reduced according to the first cycle.

[0140] In some embodiments, the second processing module 72 reduces the speed of the indoor fan in a preset first cycle, including: within a continuous preset third cycle, if the difference between the outlet temperature and the return air outlet temperature of the indoor fan is not greater than the second temperature threshold, the speed of the indoor fan is reduced in the first cycle.

[0141] Figure 8 FIG. 1 is a schematic diagram of the structure of an energy-saving control device according to an embodiment of the present disclosure. Figure 8 As shown, the energy-saving control device includes a memory 81 and a processor 82 .

[0142] The memory 81 is used to store instructions. The processor 82 is coupled to the memory 81. The processor 82 is configured to execute the instructions stored in the memory. Figure 3-6 The method according to any one of the embodiments.

[0143] like Figure 8 As shown, the energy-saving control device further includes a communication interface 83 for exchanging information with other devices. At the same time, the energy-saving control device further includes a bus 84 through which the processor 82, the communication interface 83, and the memory 81 communicate with each other.

[0144] Memory 81 may include high-speed RAM memory or non-volatile memory, such as at least one disk storage device. Memory 81 may also be a memory array. Memory 81 may also be divided into blocks, and the blocks may be combined into virtual volumes according to certain rules.

[0145] Furthermore, the processor 82 may be a central processing unit (CPU), or may be an application-specific integrated circuit (ASIC), or may be configured to implement one or more integrated circuits of the present disclosure.

[0146] The present disclosure also relates to a computer-readable storage medium, wherein the computer-readable storage medium stores computer instructions, which, when executed by a processor, implement the following Figure 3-6 The method according to any one of the embodiments.

[0147] Figure 9 FIG. 1 is a schematic diagram of the structure of an air conditioning system according to an embodiment of the present disclosure. Figure 9 As shown, the air conditioning system 91 includes an energy-saving control device 92. The energy-saving control device 92 is Figure 7 or Figure 8 In some embodiments, the structure of the air conditioning system 91 is as follows: Figure 1 or Figure 2 shown.

[0148] In some embodiments, the functional units described above may be implemented as general-purpose processors, programmable logic controllers (PLC), digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or any appropriate combination thereof, for performing the functions described in the present disclosure.

[0149] Those skilled in the art will understand that all or part of the steps to implement the above embodiments may be accomplished by hardware, or by a program to instruct the relevant hardware, and the program may be stored in a computer-readable storage medium, which may be a read-only memory, a disk, or an optical disk, etc.

[0150] The description of the present disclosure is provided for purposes of illustration and description and is not intended to be exhaustive or to limit the disclosure to the disclosed form. Many modifications and variations will be apparent to those skilled in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present disclosure and to enable those skilled in the art to understand the present disclosure and design various embodiments with various modifications suitable for specific applications.

Claims

1. An energy-saving control method, comprising: Detect indoor temperature and indoor humidity; If the indoor temperature is within a first preset range and the indoor humidity is within a second preset range, reducing the speed of the indoor fan at a preset period; Reducing the speed of the indoor fan at a preset period includes: determining whether the evaporation temperature is not less than a first temperature threshold; If the evaporation temperature is not less than the first temperature threshold, the rotation speed of the indoor fan is reduced in a preset first cycle.

2. The method according to claim 1, wherein The lower limit of the first preset range is the difference between the indoor target temperature and the preset temperature deviation; The upper limit of the first preset range is the sum of the indoor target temperature and the preset temperature deviation; The lower limit of the second preset range is the difference between the indoor target humidity and the preset humidity deviation; The upper limit of the second preset range is the sum of the indoor target humidity and the preset humidity deviation.

3. The method according to claim 1, wherein The evaporation temperature is the inlet pipe temperature of the indoor heat exchanger in the evaporating state, or the low-pressure saturation temperature of the air-conditioning system.

4. The method according to claim 1, wherein Reducing the speed of the indoor fan in a preset first cycle includes: Determine whether the current output of the compressor is not less than the output threshold; If the current output of the compressor is not less than the output threshold, the rotation speed of the indoor fan is reduced according to the first cycle.

5. The method according to claim 4, wherein Reducing the speed of the indoor fan according to the first cycle includes: Determining whether the load rate of the electric heater is not less than a load rate threshold; If the load rate of the electric heater is not less than the load rate threshold, the rotation speed of the indoor fan is reduced according to the first cycle.

6. The method according to claim 5, wherein: The load rate of the electric heater is the result of dividing the current power of the electric heater by the full load power of the electric heater.

7. The method according to claim 4, wherein: Reducing the speed of the indoor fan according to the first cycle includes: If the opening degree of the electronic expansion valve connected to the indoor heat exchanger in the condensing state is not less than a first opening degree threshold, the rotation speed of the indoor fan is reduced according to the first cycle.

8. The method according to claim 4, wherein: Reducing the speed of the indoor fan according to the first cycle includes: In a continuously preset second cycle, if the speed of the outdoor fan used to control the heat exchange of the outdoor heat exchanger in the condensing state is not greater than the speed threshold, the speed of the indoor fan is reduced according to the first cycle.

9. The method according to claim 4, wherein: Reducing the speed of the indoor fan according to the first cycle includes: In a continuously preset second cycle, if the opening of the electronic expansion valve connected to the outdoor heat exchanger in the condensing state is not greater than a second opening threshold, the speed of the indoor fan is reduced according to the first cycle.

10. The method according to claim 1, wherein Reducing the speed of the indoor fan in a preset first cycle includes: In a third consecutive preset cycle, if the difference between the air outlet temperature and the return air outlet temperature of the indoor fan is not greater than a second temperature threshold, the rotation speed of the indoor fan is reduced according to the first cycle.

11. An energy-saving control device, comprising: A first processing module is configured to detect indoor temperature and indoor humidity; The second processing module is configured to reduce the speed of the indoor fan in a preset period if the indoor temperature is within a first preset range and the indoor humidity is within a second preset range, wherein it is determined whether the evaporation temperature is not less than a first temperature threshold. If the evaporation temperature is not less than the first temperature threshold, the speed of the indoor fan is reduced in a preset first period.

12. An energy-saving control device, comprising: a memory configured to store instructions; A processor is coupled to the memory, and the processor is configured to execute the method according to any one of claims 1 to 10 based on instructions stored in the memory.

13. An air conditioning system comprising: The energy-saving control device according to claim 11 or 12.

14. A non-transitory computer-readable storage medium, wherein: The computer-readable storage medium stores computer instructions, and when the instructions are executed by a processor, the method according to any one of claims 1 to 10 is implemented.

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