Dual-system air conditioning control method, device, electronic device and readable storage medium

Abstract

The present application relates to a dual-system air conditioning control method, device, electronic device and readable storage medium, the method comprising the steps of: obtaining a first exhaust pressure and a second exhaust pressure, and obtaining difference state data according to the first exhaust pressure and the second exhaust pressure, the first exhaust pressure being the exhaust pressure of the first system, and the second exhaust pressure being the exhaust pressure of the second system; judging whether the difference state data satisfies a preset difference condition; if the difference state data does not satisfy the preset difference condition, adjusting the speeds of the first compressor and the second compressor according to the difference state data, so that the difference state data obtained after the adjustment satisfies the preset difference condition. By setting a preset difference condition for the difference state data, it is judged whether the exhaust pressure between the two systems is in a stable state, and when it is unstable, the compressor speed is adjusted based on the degree of instability, so as to ensure that the exhaust pressure of the two systems is restored to a stable state, avoiding affecting the operation of the air conditioner.

Description

Technical Field

[0001] The present application relates to the field of equipment control, and in particular to a dual-system air conditioning control method, device, electronic device and readable storage medium. Background Art

[0002] The dual independent variable frequency compressor system is a common form of computer room air conditioning, but because the compressor is variable frequency regulated and the condenser shares the fan output regulation, when the outdoor temperature is low in winter, when the dual systems are running, the pressure of one system may be too low or the pressure of the two systems may fluctuate. Summary of the invention

[0003] The present application provides a dual-system air-conditioning control method, device, electronic device and readable storage medium, aiming to solve the technical problem of pressure fluctuation of dual-system air-conditioning under low outdoor temperature in the prior art.

[0004] In order to solve the above technical problem or at least partially solve the above technical problem, the present application provides a dual-system air conditioning control method, the method comprising the steps of:

[0005] Acquire a first exhaust pressure and a second exhaust pressure, and obtain difference state data according to the first exhaust pressure and the second exhaust pressure, wherein the first exhaust pressure is the exhaust pressure of the first system, and the second exhaust pressure is the exhaust pressure of the second system;

[0006] Determining whether the difference status data meets a preset difference condition;

[0007] If the difference state data does not satisfy the preset difference condition, the rotation speeds of the first compressor and the second compressor are adjusted according to the difference state data so that the difference state data obtained after adjustment satisfies the preset difference condition.

[0008] Optionally, the difference state data includes a pressure difference between the first exhaust pressure and the second exhaust pressure; and the step of determining whether the difference state data satisfies a preset difference condition includes:

[0009] Determine whether the pressure difference is greater than a preset difference, where the preset difference is the difference between the start-up pressure and the shutdown pressure of the condensing fan;

[0010] If the pressure difference is greater than the preset difference, the difference state data does not satisfy the preset difference condition.

[0011] Optionally, the difference state data includes the first exhaust pressure and the second exhaust pressure, and the step of determining whether the difference state data satisfies a preset difference condition includes:

[0012] Determining whether the first exhaust pressure and the second exhaust pressure are both greater than or equal to a preset minimum high pressure value;

[0013] If the first exhaust pressure or the second exhaust pressure is less than the preset minimum high pressure value, the difference state data does not satisfy the preset difference condition.

[0014] Optionally, the step of adjusting the rotation speeds of the first compressor and the second compressor according to the difference state data includes:

[0015] determining whether the first exhaust pressure and the second exhaust pressure are less than a preset minimum high pressure value;

[0016] If the first exhaust pressure is less than or the second exhaust pressure is less than the preset minimum high pressure value, the rotation speed of the compressor corresponding to the larger exhaust pressure is reduced, and the rotation speed of the compressor corresponding to the smaller exhaust pressure is increased.

[0017] Optionally, the step of determining whether the first exhaust pressure and the second exhaust pressure are less than a preset minimum high pressure value includes:

[0018] If the first exhaust pressure and the second exhaust pressure are greater than or equal to the preset minimum high pressure value, the current speed demand is obtained, and it is determined whether the current speed demand is greater than / less than the initial speed demand, where the initial speed demand is the speed demand set when the dual-system air conditioner is started;

[0019] If the current speed requirement is greater than / less than the initial speed requirement, the speed of the compressor corresponding to the smaller / larger exhaust pressure is increased / decreased.

[0020] Optionally, the step of determining whether the first exhaust pressure and the second exhaust pressure are less than a preset minimum high pressure value includes:

[0021] If the first exhaust pressure and the second exhaust pressure are lower than the preset minimum high pressure value, the rotation speeds of the first compressor and the second compressor are increased synchronously.

[0022] Optionally, before the step of obtaining the first exhaust pressure and the second exhaust pressure, the step further includes:

[0023] receiving a start instruction, generating an initial speed requirement in response to the start instruction, and starting the first compressor based on the initial speed requirement;

[0024] After the operation time of the first compressor reaches the preset single-machine operation time, obtaining the current speed requirement, and determining whether the current speed requirement is less than the initial speed requirement;

[0025] If the current speed requirement is greater than or equal to the initial speed requirement, the second compressor is started.

[0026] To achieve the above object, the present invention further provides a dual-system air conditioning control device, the dual-system air conditioning control device comprising:

[0027] a first acquisition module, configured to acquire a first exhaust pressure and a second exhaust pressure, and obtain difference state data according to the first exhaust pressure and the second exhaust pressure, wherein the first exhaust pressure is the exhaust pressure of the first system, and the second exhaust pressure is the exhaust pressure of the second system;

[0028] A first judgment module, used to judge whether the difference state data meets a preset difference condition;

[0029] The first adjustment module is used to adjust the rotation speeds of the first compressor and the second compressor according to the difference state data if the difference state data does not meet the preset difference condition, so that the difference state data obtained after adjustment meets the preset difference condition.

[0030] To achieve the above objectives, the present invention also provides an electronic device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program implements the steps of the dual-system air conditioning control method as described above when executed by the processor.

[0031] To achieve the above objectives, the present invention further provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the steps of the dual-system air conditioning control method as described above are implemented.

[0032] The present invention proposes a dual-system air conditioning control method, device, electronic device and readable storage medium, which obtains a first exhaust pressure and a second exhaust pressure, and obtains difference state data according to the first exhaust pressure and the second exhaust pressure, wherein the first exhaust pressure is the exhaust pressure of the first system, and the second exhaust pressure is the exhaust pressure of the second system; determines whether the difference state data satisfies a preset difference condition; if the difference state data does not satisfy the preset difference condition, adjusts the speed of the first compressor and the second compressor according to the difference state data, so that the difference state data obtained after adjustment satisfies the preset difference condition. By setting a preset difference condition for the difference state data, it is determined whether the exhaust pressure between the two systems is in a stable state, and when it is unstable, the compressor speed is adjusted based on the degree of instability, that is, the difference state data, so as to ensure that the exhaust pressure of the two systems is restored to a stable state, avoiding affecting the operation of the air conditioner. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0034] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0035] Figure 1 It is a structural schematic diagram of a dual-system air conditioner in a dual-system air conditioner control method of the present invention;

[0036] Figure 2 Schematic diagram of the corresponding relationship between the exhaust pressure and the condensing fan frequency in the dual-system air conditioning control method of the present invention;

[0037] Figure 3 It is a flowchart of a first embodiment of a dual-system air conditioning control method of the present invention;

[0038] Figure 4 It is a schematic diagram of the overall process of the dual-system air conditioning control method of the present invention;

[0039] Figure 5 It is a schematic diagram of the module structure of the electronic device of the present invention. DETAILED DESCRIPTION

[0040] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only embodiments of a part of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work should fall within the scope of protection of the present application.

[0041] The present invention provides a dual-system air conditioning control method, which is applied to a dual-system air conditioning control device. First, referring to Figure 1 , Figure 1 This is a schematic diagram of the structure of the dual-system air conditioner in this embodiment. It should be noted that: Figure 1 Only one embodiment is provided for reference, and the structure of the dual-system air conditioner for specific application can be set based on the actual application scenario and needs.

[0042] The dual-system air conditioner includes a controller C, a condensing fan inverter LB and two sets of heat exchange systems with the same structure. It should be noted that the same structure means that the basic components and connection methods used in the heat exchange system in this embodiment are the same. In actual applications, the specific settings of the two heat exchange systems may be the same or different. For the sake of convenience, the two heat exchange systems in this embodiment are divided into a main heat exchange system and an auxiliary heat exchange system.

[0043] A single heat exchange system includes a compressor (corresponding to the first compressor Y1 in the main heat exchange system and the second compressor Y2 in the auxiliary heat exchange system), an evaporator (corresponding to the first evaporator Z1 in the main heat exchange system and the second evaporator Z2 in the auxiliary heat exchange system), a throttle valve (corresponding to the first throttle valve J1 in the main heat exchange system and the second throttle valve J2 in the auxiliary heat exchange system), and a condenser (corresponding to the first condenser L1 in the main heat exchange system and the second condenser L2 in the auxiliary heat exchange system). The air inlet of the compressor is connected to the exhaust port of the compressor through the evaporator, the throttle valve and the condenser in sequence. At the same time, an exhaust pressure sensor is arranged at the exhaust port of the compressor (corresponding to the first exhaust pressure sensor P1 in the main heat exchange system and the second exhaust pressure sensor P2 in the auxiliary heat exchange system). The exhaust pressure sensor is connected to the condensing fan inverter LB. The throttle valve in this embodiment is an electronic expansion valve.

[0044] The condensers of the two heat exchange systems can share the condensing fan LF, or they can respectively set corresponding condensing fans LF, the speeds of each condensing fan LF remain synchronized, and the condensing fans LF are connected to the condensing fan inverter LB; the evaporators of the two heat exchange systems can share the evaporating fan ZF, or they can respectively set corresponding evaporating fans ZF, the speeds of each evaporating fan ZF remain synchronized, and a temperature and humidity sensor Q is provided near the evaporator, and the temperature and humidity sensor Q is connected to the controller C.

[0045] The controller C and the condensing fan inverter LB can be integrated into a dual-system air-conditioning control device or can be independently set.

[0046] The main heat exchange system is a heat exchange system that is started and operated by default; the main heat exchange system includes a first compressor Y1, a first evaporator Z1, a first throttle valve J1 and a first condenser L1, wherein a first exhaust pressure sensor P1 is arranged at the exhaust port of the first compressor Y1, and the first exhaust pressure sensor P1 collects the first exhaust pressure; the auxiliary heat exchange system includes a second compressor Y2, a second evaporator Z2, a second throttle valve J2 and a second condenser L2, wherein a second exhaust pressure sensor P2 is arranged at the exhaust port of the second compressor Y2, and the second exhaust pressure sensor P2 collects the second exhaust pressure.

[0047] The basic heat exchange principle of dual-system air conditioning can be found in the prior art and will not be elaborated here;

[0048] The following is an explanation of the basic control method of the compressor in the dual-system air conditioner in one embodiment:

[0049] When the dual-system air conditioner is started, the current temperature and humidity are obtained through the temperature and humidity sensor Q, and the temperature difference and humidity difference between the current temperature, the current humidity and the target temperature and humidity are obtained. The cooling demand and the dehumidification demand are determined according to the temperature difference and the humidity difference. The cooling demand and the dehumidification demand can be combined into a speed demand. At this time, the speed demand is the initial speed demand, and then the compressor speed is determined according to the initial speed demand, and the compressor is controlled to operate at the compressor speed. It should be noted that when only one heat exchange system is operating, generally, when only the main heat exchange system is operating, the speed of the first compressor Y1 is determined according to the initial speed demand; when the two heat exchange systems are operating at the same time, the speeds of the first compressor Y1 and the second compressor Y2 are determined at the same time according to the initial speed demand; when the speed demand changes, the system frequency value is synchronously adjusted to the maximum operating frequency of the compressor, and then the compressor speed is determined according to the new speed demand.

[0050] During the operation of the dual-system air conditioner, it is necessary to continuously update the output compressor speed to ensure the accuracy of the speed. The specific update method can be set according to the actual application scenario. For example, in this embodiment, the output compressor speed is adjusted by PID control. Specifically:

[0051]

[0052] Among them, N CF (k) is the compressor output value corresponding to the kth sampling period, N CF The value range of (k) is the minimum frequency of the compressor N min ~Compressor rated frequency N rat , unit is Hz;

[0053] u pCF (k) is the P action value of the kth sampling period, u pCF The value range of (k) is N min -N rat ~N rat -N min , unit is Hz;

[0054] u iCF (k) is the I action value of the kth sampling period, u iCF The value range of (k) is N min -N rat ~N rat -N min , unit is Hz;

[0055] N C_rec is the starting frequency of the compressor, in Hz.

[0056] The following is an explanation of the basic control method of the condensing fan LF in the dual-system air conditioner in one embodiment:

[0057] The frequency of the condensing fan LF is adjusted according to the pressure of the refrigerant in the condenser, that is, the exhaust pressure. Figure 2 , the correspondence between the exhaust pressure and the frequency of the condensing fan LF is pre-set, and the condensing fan inverter obtains the first exhaust pressure and the second exhaust pressure. If the first exhaust pressure is the same as the second exhaust pressure, the frequency of the condensing fan LF is obtained by matching any exhaust pressure. If the first exhaust pressure is different from the second exhaust pressure, the exhaust pressure with a higher pressure value is used as the matching basis to match the frequency of the condensing fan LF; wherein, the starting pressure refers to the exhaust pressure value that triggers the start of the condensing fan LF; the shutdown pressure refers to the exhaust pressure value that triggers the condensing fan LF to stop running; the speed limit pressure refers to the minimum exhaust pressure value corresponding to the maximum frequency of the condensing fan LF.

[0058] It should be noted that the above-mentioned basic control method of the dual-system air conditioner is only for clarifying the technical solution of the present invention. In actual applications, the basic control method of the dual-system air conditioner can be adjusted accordingly based on the actual application scenario.

[0059] Reference Figure 3 , Figure 3 This is a flow chart of a first embodiment of a dual-system air conditioning control method of the present invention, the method comprising the steps of:

[0060] Step S10, acquiring a first exhaust pressure and a second exhaust pressure, and obtaining difference state data according to the first exhaust pressure and the second exhaust pressure, wherein the first exhaust pressure is the exhaust pressure of the first system, and the second exhaust pressure is the exhaust pressure of the second system;

[0061] The difference state data is used to reflect the states of the first exhaust pressure and the second exhaust pressure, and the degree of difference between the first exhaust pressure and the second exhaust pressure.

[0062] Step S20, determining whether the difference status data meets a preset difference condition;

[0063] The preset difference condition is used to characterize the requirement for difference status data during normal operation.

[0064] If the difference status data meets the preset difference condition, it means that the difference status data between the current first exhaust pressure and the second exhaust pressure meets the normal operating requirements. Therefore, the current compressor speed can be maintained at this time; it should be noted that maintaining the current compressor speed means not making additional adjustments to the compressor speed based on the difference status data, rather than keeping the compressor speed unchanged. At this time, the compressor speed can still be adjusted by the aforementioned basic control method or other additional speed control methods.

[0065] Step S30: If the difference state data does not satisfy the preset difference condition, the rotation speeds of the first compressor and the second compressor are adjusted according to the difference state data, so that the difference state data obtained after adjustment satisfies the preset difference condition.

[0066] If the difference status data does not meet the preset difference condition, it means that the difference status data between the current first exhaust pressure and the second exhaust pressure does not meet the normal operating requirements. At this time, the speed of the compressor needs to be adjusted so that the difference status data meets the normal operating requirements. It should be noted that the compressor speed adjustment based on the difference status data and the aforementioned basic control method are two independent compressor speed adjustment mechanisms, one based on the difference status data, and the other based on the speed requirement. In the application, the priority of the difference status data is higher than the priority of the speed requirement. When there is a need for speed adjustment in both adjustment methods, the speed is adjusted based on the difference status data first. After the adjustment makes the difference status data meet the preset difference condition, the speed is adjusted based on the speed requirement.

[0067] This embodiment determines whether the exhaust pressure between the two systems is in a stable state by setting a preset difference condition for the difference state data, and when it is unstable, adjusts the compressor speed based on the degree of instability, that is, the difference state data, thereby ensuring that the exhaust pressure of the two systems returns to a stable state and avoiding affecting the operation of the air conditioner.

[0068] Further, see also Figure 4 , wherein P1 is the first exhaust pressure, P2 is the second exhaust pressure, Pm is the preset minimum high pressure value, and Pw is the preset difference value. In the second embodiment of the dual-system air conditioning control method of the present invention proposed based on the first embodiment of the present invention, the difference state data includes the pressure difference between the first exhaust pressure and the second exhaust pressure; the step S20 includes the steps of:

[0069] Step S21, determining whether the pressure difference is greater than a preset difference, wherein the preset difference is the difference between the start-up pressure and the shutdown pressure of the condensing fan;

[0070] Step S22: If the pressure difference is greater than the preset difference, the difference state data does not satisfy the preset difference condition.

[0071] If the pressure difference is less than or equal to the preset difference, the difference state data satisfies the preset difference condition.

[0072] The pressure difference is used to represent the difference between the first exhaust pressure and the second exhaust pressure.

[0073] The preset difference is used to characterize the maximum difference between the first exhaust pressure and the second exhaust pressure allowed under normal conditions. The starting pressure of the condensing fan refers to the exhaust pressure value that triggers the condensing fan to start, and the stopping pressure refers to the exhaust pressure value that triggers the condensing fan to stop running. It should be noted that in theory, the starting pressure and the stopping pressure are the same. In practical applications, in order to avoid the condensing fan frequently switching between starting and stopping when the exhaust pressure is near the starting pressure, the stopping pressure is set to be smaller than the starting pressure, such as Figure 2 As shown. In the case where two heat exchange systems share the output of the condensing fan, if the required air volume of the condensing fan is too much less than the actual air volume, the heat exchange system with lower exhaust pressure will continue to reduce the exhaust pressure due to the throttle valve superheat adjustment; if the throttle valve is close to fully closed, such as generally about 15%, the refrigerant flow rate changes dramatically at this time, making it difficult for the system to stabilize. When the compressor is at the lowest speed, the condensing fan is at the lowest speed, the throttle valve opening is close to fully closed, and the outdoor temperature is the lowest cooling temperature, such as -40℃ and the system pressure value with lower exhaust pressure is the preset minimum high pressure value, the evaporator should be maintained above the minimum evaporation temperature and maintain the set superheat. The current is the critical point for the normal operation of the system. At this time, if the exhaust pressure of the heat exchange system with higher exhaust pressure is greater than the starting pressure of the condensing fan, the condensing fan will increase the speed, and the heat exchange system with lower exhaust pressure will continue to reduce due to the increase in the condensing fan speed; therefore, the difference between the starting pressure and the shutdown pressure of the condensing fan is used as the preset difference.

[0074] When the pressure difference is greater than the preset difference, it is considered that the difference between the first exhaust pressure and the second exhaust pressure is too large. If the system continues to operate in this way, it will easily lead to system instability. Therefore, the preset difference condition is not met.

[0075] Further, the difference state data includes the first exhaust pressure and the second exhaust pressure, and the step S20 includes the steps of:

[0076] Step S23, determining whether the first exhaust pressure and the second exhaust pressure are both greater than or equal to a preset minimum high pressure value;

[0077] Step S24: if the first exhaust pressure or the second exhaust pressure is less than the preset minimum high pressure value, the difference state data does not satisfy the preset difference condition.

[0078] If the first exhaust pressure and the second exhaust pressure are greater than or equal to the preset minimum high pressure value, the difference state data satisfies the preset difference condition.

[0079] The preset minimum high pressure value is the lowest working high pressure value allowed for the compressor to operate. The preset minimum high pressure value is the same as the shutdown pressure value of the condensing fan. Under the preset minimum high pressure value, the configured throttle valve can ensure the liquid supply of the unit when the opening is fully opened, and the rated evaporation temperature and the established superheat can be maintained. Optionally, the preset minimum high pressure value in this embodiment is equal to the sum of the pressure drop of the electronic expansion valve at the maximum opening, the pressure drop of the liquid distributor, the pressure drop of the liquid distributor capillary, the pressure drop of the evaporator, and the rated evaporation pressure.

[0080] When at least one exhaust pressure is lower than the preset minimum high pressure value, it means that the exhaust pressure cannot support the minimum high pressure requirement of the heat exchange system, that is, the normal operation of the heat exchange system cannot be guaranteed. Therefore, it is considered that the preset difference condition is not met.

[0081] It should be noted that the above two judgment methods, namely the preset difference judgment and the preset minimum high pressure value judgment, can be set separately or in combination. As long as any one of the judgments is considered to not meet the preset difference condition, it is considered that the difference status data does not meet the preset difference condition.

[0082] This embodiment can reasonably determine whether the difference status data meets the preset difference condition.

[0083] Further, in a third embodiment of the dual-system air conditioning control method of the present invention proposed based on the first embodiment of the present invention, step S30 includes the following steps:

[0084] Step S31, determining whether the first exhaust pressure and the second exhaust pressure are less than a preset minimum high pressure value;

[0085] Step S32: if the first exhaust pressure is less than or the second exhaust pressure is less than the preset minimum high pressure value, the speed of the compressor corresponding to the larger exhaust pressure is reduced, and the speed of the compressor corresponding to the smaller exhaust pressure is increased.

[0086] When one of the first exhaust pressure and the second exhaust pressure is greater than or equal to the preset minimum high pressure value, and the other is less than the preset minimum high pressure value, in order to increase the smaller exhaust pressure to above the preset minimum high pressure value as quickly as possible, the compressors of the two heat exchange systems are adjusted synchronously, and the compressor speed corresponding to the smaller exhaust pressure is increased to increase the corresponding exhaust pressure, and the compressor speed corresponding to the larger exhaust pressure is reduced to reduce the corresponding exhaust pressure, so that the exhaust pressures in the two heat exchange systems can be quickly adjusted and the smaller exhaust pressure can be quickly increased; at the same time, the larger exhaust pressure is reduced and the smaller exhaust pressure is increased, so that the pressure difference between the two exhaust pressures is gradually reduced, so that the pressure difference can be made or maintained less than the preset difference. It should be noted that the speed of the compressor has a maximum speed and a minimum speed. When the compressor speed is increased to the maximum speed or reduced to the minimum speed during the adjustment process, it is maintained at the maximum speed or the minimum speed. The same applies to the subsequent embodiments and will not be repeated.

[0087] Step S33, if the first exhaust pressure and the second exhaust pressure are greater than or equal to the preset minimum high pressure value, obtain the current speed demand, and determine whether the current speed demand is greater than / less than the initial speed demand, where the initial speed demand is the speed demand set when the dual-system air conditioner is started;

[0088] If the current speed requirement is greater than / less than the initial speed requirement, the speed of the compressor corresponding to the smaller / larger exhaust pressure is increased / decreased.

[0089] When the first exhaust pressure and the second exhaust pressure are greater than or equal to the preset minimum high pressure value, since the preset difference condition is not met at this time, the pressure difference between the first exhaust pressure and the second exhaust pressure must be greater than the preset difference. At this time, the exhaust pressure needs to be adjusted to reduce the pressure difference until the pressure difference is less than or equal to the preset difference.

[0090] Since the first exhaust pressure and the second exhaust pressure are both greater than or equal to the preset minimum high pressure value, both heat exchange systems can meet the minimum high pressure requirement at this time. In order to avoid the sudden change of the compressor speed affecting normal refrigeration or dehumidification, the compressor speed is adjusted in combination with the actual refrigeration demand and dehumidification demand, that is, the speed demand; specifically, if the current speed demand is consistent with the initial speed demand, the compressor speed is kept unchanged until the current speed demand is greater than / less than the initial speed demand. If the current speed demand is greater than the initial speed demand, it indicates that a greater speed intensity is currently required. Therefore, the speed of the compressor corresponding to the larger exhaust pressure is kept unchanged, and the speed of the compressor corresponding to the smaller exhaust pressure is increased at the same time, until the pressure difference is less than or equal to the preset difference, thereby increasing the compressor speed as a whole to meet the speed demand;

[0091] If the current speed requirement is less than the initial speed requirement, it means that a smaller speed intensity is currently required. Therefore, the speed of the compressor corresponding to the smaller exhaust pressure is kept unchanged, and the speed of the compressor corresponding to the larger exhaust pressure is reduced until the pressure difference is less than or equal to the preset difference. The overall speed of the compressor is reduced to meet the speed requirement.

[0092] Step S34: if the first exhaust pressure and the second exhaust pressure are lower than the preset minimum high pressure value, the rotation speeds of the first compressor and the second compressor are increased synchronously.

[0093] When the first exhaust pressure and the second exhaust pressure are both less than the preset minimum high pressure value, it means that the pressures of the two heat exchange systems are insufficient to support normal operation. If they are still running at a low speed, it is easy to cause system instability. Therefore, the speeds of the first compressor and the second compressor are increased synchronously to adjust the exhaust pressure.

[0094] It should be noted that the adjustment strategies for different exhaust pressures are adjusted based on the current different states. For example, when the first exhaust pressure and the second exhaust pressure are both less than the preset minimum high pressure value, the adjustment strategy is to synchronously increase the speeds of the first compressor and the second compressor. During the adjustment process, if the state of the first exhaust pressure and the second exhaust pressure becomes that the first exhaust pressure is different or the second exhaust pressure is less than the preset minimum high pressure value, the adjustment strategy is adjusted to reduce the speed of the compressor corresponding to the larger exhaust pressure and increase the speed of the compressor corresponding to the smaller exhaust pressure, and so on, until the difference state data meets the preset difference condition.

[0095] This embodiment can reasonably make the difference state data meet the preset difference condition.

[0096] Furthermore, in a fourth embodiment of the dual-system air conditioning control method of the present invention proposed based on the first embodiment of the present invention, the following steps are included before step S10:

[0097] Step S40, receiving a start instruction, generating an initial speed requirement in response to the start instruction, and starting the first compressor based on the initial speed requirement;

[0098] Step S50, after the first compressor operation time reaches the preset stand-alone operation time, obtaining the current speed requirement, and determining whether the current speed requirement is less than the initial speed requirement;

[0099] Step S60: If the current speed requirement is greater than or equal to the initial speed requirement, the second compressor is started.

[0100] The start command can be triggered automatically or by the user. When triggered automatically, the target temperature and target humidity are set. When the difference between the current temperature and the target temperature or the difference between the current humidity and the target humidity is greater than the preset value, the start command is triggered, and the cooling demand is obtained based on the difference between the current temperature and the target temperature, and the dehumidification demand is obtained based on the difference between the current humidity and the target humidity.

[0101] When the speed demand is relatively small, the cooling or dehumidification task can be achieved through a single heat exchange system. Therefore, when the air conditioner is started, only the first heat exchange system is operated, the first compressor is started, and the first heat exchange system is independently operated for a preset stand-alone operation time. The preset stand-alone operation time can be set according to the actual application scenario. After the preset stand-alone operation time, it is determined whether the current speed demand is less than the initial speed demand. If the current speed demand is less than the initial speed demand, it is considered that the independent operation of the first heat exchange system has achieved the expected effect. Therefore, the independent operation of the first heat exchange system can be maintained; if the current speed demand is greater than or equal to the initial speed demand, it is considered that the independent operation of the first heat exchange system has not achieved the expected effect. Therefore, the second heat exchange system is started, and the dual systems perform cooling and dehumidification tasks.

[0102] It should be noted that when judging whether the current speed demand is less than the initial speed demand, a certain minimum expected value can be set. Only when the current speed demand is less than the initial speed demand and reaches the minimum expected value, the current speed demand is considered to be less than the initial speed demand. The minimum expected value can be a specific value or a percentage, such as the current speed demand is less than the initial speed demand, and the difference reaches 30rps, or the current speed demand is less than the initial speed demand, and the difference accounts for at least 30% of the initial speed demand.

[0103] Furthermore, it should be noted that when starting the first compressor, the first compressor is operated at a starting speed for a preset starting time, and when starting the second compressor, the first compressor and the second compressor are operated at a starting speed for a preset starting time, and after the preset starting time, the control frequency of the second compressor is kept consistent with that of the first compressor during the second starting time; the starting speed and the preset starting time can be set based on actual application scenarios and needs, such as a starting speed of 30 to 75 rps, and a preset starting time of 60 to 999s; by running the compressor at the starting speed for a preset starting time when starting, the stability of the system is ensured.

[0104] This embodiment can operate with a single heat exchange system or dual systems when the speed requirements are different, thereby reducing energy consumption.

[0105] It should be noted that, for the aforementioned method embodiments, for the sake of simplicity, they are all expressed as a series of action combinations, but those skilled in the art should be aware that the present application is not limited by the described order of actions, because according to the present application, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present application.

[0106] Through the description of the above implementation methods, those skilled in the art can clearly understand that the method according to the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), and includes a number of instructions for a terminal device (which can be a mobile phone, computer, server, or network device, etc.) to execute the methods described in each embodiment of the present application.

[0107] The present application also provides a dual-system air conditioning control device for implementing the dual-system air conditioning control method, the dual-system air conditioning control device comprising:

[0108] a first acquisition module, configured to acquire a first exhaust pressure and a second exhaust pressure, and obtain difference state data according to the first exhaust pressure and the second exhaust pressure, wherein the first exhaust pressure is the exhaust pressure of the first system, and the second exhaust pressure is the exhaust pressure of the second system;

[0109] A first judgment module, used to judge whether the difference state data meets a preset difference condition;

[0110] The first adjustment module is used to adjust the rotation speeds of the first compressor and the second compressor according to the difference state data if the difference state data does not meet the preset difference condition, so that the difference state data obtained after adjustment meets the preset difference condition.

[0111] The dual-system air-conditioning control device determines whether the exhaust pressure between the two systems is in a stable state by setting a preset difference condition for the difference state data, and when it is unstable, adjusts the compressor speed based on the degree of instability, that is, the difference state data, thereby ensuring that the exhaust pressure of the two systems returns to a stable state to avoid affecting the operation of the air conditioner.

[0112] It should be noted that the first acquisition module in this embodiment can be used to execute step S10 in the embodiment of the present application, the first judgment module in this embodiment can be used to execute step S20 in the embodiment of the present application, and the first adjustment module in this embodiment can be used to execute step S30 in the embodiment of the present application.

[0113] Further, the difference state data includes a pressure difference between the first exhaust pressure and the second exhaust pressure; and the first judgment module includes:

[0114] A first judgment unit, used to judge whether the pressure difference is greater than a preset difference, wherein the preset difference is the difference between the start pressure and the stop pressure of the condensing fan;

[0115] The first execution unit is configured to determine that if the pressure difference is greater than the preset difference, the difference state data does not satisfy the preset difference condition.

[0116] Further, the difference state data includes the first exhaust pressure and the second exhaust pressure, and the first judgment module includes:

[0117] a second judgment unit, configured to judge whether the first exhaust pressure and the second exhaust pressure are both greater than or equal to a preset minimum high pressure value;

[0118] The second execution unit is configured to determine that the difference state data does not satisfy the preset difference condition if the first exhaust pressure or the second exhaust pressure is less than the preset minimum high pressure value.

[0119] Furthermore, the first adjustment module includes:

[0120] a third judging unit, configured to judge whether the first exhaust pressure and the second exhaust pressure are less than a preset minimum high pressure value;

[0121] The first regulating unit is used to reduce the speed of the compressor corresponding to the larger exhaust pressure and increase the speed of the compressor corresponding to the smaller exhaust pressure if the first exhaust pressure is less than or the second exhaust pressure is less than the preset minimum high pressure value.

[0122] Furthermore, the first adjustment module includes:

[0123] a fourth judgment unit, configured to obtain a current speed demand if the first exhaust pressure and the second exhaust pressure are greater than or equal to the preset minimum high pressure value, and to judge whether the current speed demand is greater than / less than an initial speed demand, wherein the initial speed demand is a speed demand set when the dual-system air conditioner is started;

[0124] The second regulating unit is used to increase / decrease the speed of the compressor corresponding to the smaller / larger exhaust pressure if the current speed requirement is greater / less than the initial speed requirement.

[0125] Furthermore, the first adjustment module includes:

[0126] The third regulating unit synchronously increases the rotation speeds of the first compressor and the second compressor if the first exhaust pressure and the second exhaust pressure are less than the preset minimum high pressure value.

[0127] Furthermore, the device also includes:

[0128] a first receiving module, configured to receive a start instruction, generate an initial speed requirement in response to the start instruction, and start the first compressor based on the initial speed requirement;

[0129] A second acquisition module is used to acquire a current speed requirement after the operation time of the first compressor reaches a preset single-machine operation time, and determine whether the current speed requirement is less than the initial speed requirement;

[0130] The first starting module is configured to start the second compressor if the current speed requirement is greater than or equal to the initial speed requirement.

[0131] It should be noted that the examples and application scenarios implemented by the above modules and corresponding steps are the same, but are not limited to the contents disclosed in the above embodiments. It should be noted that the above modules as part of the device can be implemented by software or hardware, wherein the hardware environment includes a network environment.

[0132] Reference Figure 5 In terms of hardware structure, the electronic device may include components such as a communication module 10, a memory 20, and a processor 30. In the electronic device, the processor 30 is connected to the memory 20 and the communication module 10 respectively, and a computer program is stored in the memory 20. The computer program is executed by the processor 30 at the same time, and the steps of the above method embodiment are implemented when the computer program is executed.

[0133] The communication module 10 can be connected to an external communication device through a network. The communication module 10 can receive requests from an external communication device, and can also send requests, instructions and information to the external communication device, which can be other electronic devices, servers or Internet of Things devices, such as televisions, etc.

[0134] The memory 20 can be used to store software programs and various data. The memory 20 can mainly include a program storage area and a data storage area, wherein the program storage area can store an operating system, an application required for at least one function (such as obtaining the first exhaust pressure and the second exhaust pressure), etc.; the data storage area can include a database, and the data storage area can store data or information created according to the use of the system, etc. In addition, the memory 20 can include a high-speed random access memory, and can also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other volatile solid-state storage devices.

[0135] The processor 30 is the control center of the electronic device. It uses various interfaces and lines to connect various parts of the entire electronic device. It executes various functions of the electronic device and processes data by running or executing software programs and / or modules stored in the memory 20, and calling data stored in the memory 20, so as to monitor the electronic device as a whole. The processor 30 may include one or more processing units; optionally, the processor 30 may integrate an application processor and a modem processor, wherein the application processor mainly processes the operating system, user interface, and application programs, and the modem processor mainly processes wireless communications. It is understandable that the above-mentioned modem processor may not be integrated into the processor 30.

[0136] although Figure 5 Although not shown, the electronic device may further include a circuit control module, which is used to connect to a power source to ensure the normal operation of other components. Figure 5 The electronic device structure shown in the figure does not constitute a limitation of the electronic device, and may include more or less components than shown in the figure, or combine certain components, or arrange the components differently.

[0137] The present invention also provides a computer-readable storage medium on which a computer program is stored. The computer-readable storage medium may be Figure 5 The memory 20 in the electronic device may also be at least one of a ROM (Read-Only Memory) / RAM (Random Access Memory), a magnetic disk, and an optical disk. The computer-readable storage medium includes a number of instructions for enabling a terminal device with a processor (which may be a television, a car, a mobile phone, a computer, a server, a terminal, or a network device, etc.) to execute the methods described in the various embodiments of the present invention.

[0138] In the present invention, the terms "first", "second", "third", "fourth" and "fifth" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0139] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0140] Although the embodiments of the present invention have been shown and described above, the scope of protection of the present invention is not limited thereto. It is understood that the above embodiments are exemplary and cannot be understood as limiting the present invention. A person of ordinary skill in the art can change, modify and replace the above embodiments within the scope of the present invention, and these changes, modifications and replacements should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope of protection of the claims.

Claims

1. A dual-system air conditioning control method, characterized in that: The method comprises: Acquire a first exhaust pressure and a second exhaust pressure, and obtain difference state data according to the first exhaust pressure and the second exhaust pressure, wherein the first exhaust pressure is the exhaust pressure of the first system, and the second exhaust pressure is the exhaust pressure of the second system; Determining whether the difference status data meets a preset difference condition; If the difference state data does not satisfy the preset difference condition, adjusting the rotation speeds of the first compressor and the second compressor according to the difference state data so that the difference state data obtained after adjustment satisfies the preset difference condition; The step of adjusting the rotation speeds of the first compressor and the second compressor according to the difference state data comprises: determining whether the first exhaust pressure and the second exhaust pressure are less than a preset minimum high pressure value; If the first exhaust pressure is less than or the second exhaust pressure is less than the preset minimum high pressure value, the rotation speed of the compressor corresponding to the larger exhaust pressure is reduced, and the rotation speed of the compressor corresponding to the smaller exhaust pressure is increased.

2. The dual-system air conditioning control method according to claim 1, characterized in that: The difference state data includes a pressure difference between the first exhaust pressure and the second exhaust pressure; The step of determining whether the difference status data meets a preset difference condition comprises: Determine whether the pressure difference is greater than a preset difference, where the preset difference is the difference between the start-up pressure and the shutdown pressure of the condensing fan; If the pressure difference is greater than the preset difference, the difference state data does not satisfy the preset difference condition.

3. The dual-system air conditioning control method according to claim 1, characterized in that: The difference state data includes the first exhaust pressure and the second exhaust pressure, and the step of determining whether the difference state data meets a preset difference condition includes: Determining whether the first exhaust pressure and the second exhaust pressure are both greater than or equal to a preset minimum high pressure value; If the first exhaust pressure or the second exhaust pressure is less than the preset minimum high pressure value, the difference state data does not satisfy the preset difference condition.

4. The dual-system air conditioning control method according to claim 1, characterized in that: The step of determining whether the first exhaust pressure and the second exhaust pressure are less than a preset minimum high pressure value comprises: If the first exhaust pressure and the second exhaust pressure are greater than or equal to the preset minimum high pressure value, the current speed demand is obtained, and it is determined whether the current speed demand is greater than / less than the initial speed demand, where the initial speed demand is the speed demand set when the dual-system air conditioner is started; If the current speed requirement is greater than / less than the initial speed requirement, the speed of the compressor corresponding to the smaller / larger exhaust pressure is increased / decreased.

5. The dual-system air conditioning control method according to claim 1, characterized in that: The step of determining whether the first exhaust pressure and the second exhaust pressure are less than a preset minimum high pressure value comprises: If the first exhaust pressure and the second exhaust pressure are lower than the preset minimum high pressure value, the rotation speeds of the first compressor and the second compressor are increased synchronously.

6. The dual-system air conditioning control method according to claim 1, characterized in that: Before the step of obtaining the first exhaust pressure and the second exhaust pressure, the following steps are further included: receiving a start instruction, generating an initial speed requirement in response to the start instruction, and starting the first compressor based on the initial speed requirement; After the operation time of the first compressor reaches the preset single-machine operation time, obtaining the current speed requirement, and determining whether the current speed requirement is less than the initial speed requirement; If the current speed requirement is greater than or equal to the initial speed requirement, the second compressor is started.

7. A dual-system air conditioning control device, characterized in that: Applicable to the dual-system air conditioning control method according to any one of claims 1 to 6, the dual-system air conditioning control device comprises: a first acquisition module, configured to acquire a first exhaust pressure and a second exhaust pressure, and obtain difference state data according to the first exhaust pressure and the second exhaust pressure, wherein the first exhaust pressure is the exhaust pressure of the first system, and the second exhaust pressure is the exhaust pressure of the second system; A first judgment module, used to judge whether the difference state data meets a preset difference condition; The first adjustment module is used to adjust the rotation speeds of the first compressor and the second compressor according to the difference state data if the difference state data does not meet the preset difference condition, so that the difference state data obtained after adjustment meets the preset difference condition.

8. An electronic device, characterized in that: The electronic device includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program, when executed by the processor, implements the steps of the dual-system air conditioning control method as described in any one of claims 1 to 6.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the dual-system air-conditioning control method according to any one of claims 1 to 6 are implemented.

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