Control method for low-load dehumidification of an air conditioner and related device

Abstract

The embodiment of the present application provides a kind of air conditioner low load dehumidification control method and related equipment, for maintaining the environmental humidity of machine room site, to guarantee machine room system stable operation as far as possible.The method of the embodiment of the present application comprises: when the current load rate value of the air conditioning equipment in the machine room system is in the first load rate interval, start the low load refrigeration mode of the compressor, and configure the first refrigeration parameter of the compressor based on the low load refrigeration mode;Obtain the current humidity value of the compressor running the first refrigeration parameter in a predetermined time period, determine whether the current humidity value meets the preset humidity value;If the current humidity value does not meet the preset humidity value, adjust the current equipment parameter value of the air conditioning equipment to target equipment parameter value, to determine the target refrigeration mode of the air conditioning equipment according to the target equipment parameter value.

Description

[0001] This application claims priority to the Chinese patent application No. 202410003382.7, filed on January 02, 2024, and entitled "A control method for low-load dehumidification of an air conditioner and related equipment", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] Embodiments of the present application relate to the technical field of intelligent air conditioners, and in particular to a control method for low-load dehumidification of an air conditioner and related equipment. BACKGROUND

[0003] Currently, when selecting an air conditioner for a computer room, the selected air conditioner often has a higher cooling capacity than the actual heat load, and there are cases where the load of a small or medium-sized network point is much lower than the minimum cooling capacity of the air conditioner. This results in a mismatch between the cooling capacity of the air conditioner and the heat load in the computer room, causing the compressor of the air conditioner to frequently start and stop as the temperature in the computer room changes, reducing the effective operation time of the air conditioner, and further reducing the dehumidification capacity of the air conditioner. The servers in the computer room operate in an environment with high humidity.

[0004] At the same time, when the compressor is working at a low frequency for a long time, there is a risk of insufficient lubrication of the compressor due to delayed oil return. At the same time, when the oil is returned, the frequency of the compressor suddenly increases, which can cause the system to output too much cold energy and the outlet air temperature to be too low, resulting in high humidity.

[0005] Therefore, how to control the operating parameters of the air conditioner to meet the cooling and dehumidification requirements of the servers in the computer room is a technical problem that needs to be solved. SUMMARY

[0006] Embodiments of the present application provide a control method for low-load dehumidification of an air conditioner and related equipment for maintaining the humidity of the computer room environment to ensure stable operation of the computer room system as much as possible.

[0007] The first aspect of the embodiments of the present application provides a control method for low-load dehumidification of an air conditioner, comprising:

[0008] When the current load rate value of the air conditioner device in the computer room system is in a first load rate interval, a low-load cooling mode of the compressor is started, and a first cooling parameter of the compressor is configured based on the low-load cooling mode;

[0009] A current humidity value of the compressor running the first cooling parameter within a preset time period is obtained, and it is determined whether the current humidity value meets a preset humidity value;

[0010] If the current humidity value does not satisfy the preset humidity value, the current device parameter value of the air conditioning equipment is adjusted to a target device parameter value, so as to determine a target refrigeration mode of the air conditioning equipment according to the target device parameter value.

[0011] Optionally, the method further comprises:

[0012] Optionally, the method further comprises:

[0013] Optionally, the method further comprises:

[0014] Optionally, the method further comprises:

[0015] Optionally, the method further comprises:

[0016] Optionally, the method further comprises:

[0017] Optionally, the method further comprises:

[0018] Optionally, the method further comprises:

[0019] According to the second load rate interval or the third load rate interval, a second return air temperature value and a second refrigeration demand value are set, the second return air temperature value is controlled to change over time, the second refrigeration demand value is controlled to maintain in a second refrigeration demand interval, a standard refrigeration mode of the compressor is started, and a second refrigeration parameter of the compressor is configured based on the standard refrigeration mode; wherein the second return air temperature value is less than the first return air temperature value, and the second refrigeration demand value is greater than the first refrigeration demand value.

[0020] Optionally, the adjusting the current equipment parameter value of the air conditioning equipment to a target equipment parameter value to determine a target refrigeration mode of the air conditioning equipment according to the target equipment parameter value comprises:

[0021] When the current load rate value is in the first load rate interval, an initial suction gas superheat correction value, an initial evaporation temperature correction value, an initial indoor fan speed correction proportional coefficient value, or an initial refrigeration sensitivity correction value of the air conditioning equipment are determined;

[0022] According to the current humidity value, the initial suction gas superheat correction value is gradually reduced to a first suction gas superheat correction value, the initial evaporation temperature correction value is gradually reduced to a first evaporation temperature correction value, the initial indoor fan speed correction proportional coefficient value is maintained as a first indoor fan speed correction proportional coefficient value, and the initial refrigeration sensitivity correction value is adjusted as a first refrigeration sensitivity correction value according to a first preset correction mode; wherein the first suction gas superheat correction value is negatively correlated with a refrigeration capacity; the first evaporation temperature correction value is negatively correlated with the refrigeration capacity; the first indoor fan speed correction proportional coefficient value is positively correlated with the refrigeration capacity, and the first indoor fan speed correction proportional coefficient value is less than 1; and the first refrigeration sensitivity correction value is used to describe the sensitivity of maintaining the refrigeration mode, and the first refrigeration sensitivity correction value is greater than 1;

[0023] The target refrigeration mode is determined according to one or more of the first suction gas superheat correction value, the first evaporation temperature correction value, the first indoor fan speed correction proportional coefficient value, or the first refrigeration sensitivity correction value.

[0024] Optionally, the adjusting the current equipment parameter value of the air conditioning equipment to a target equipment parameter value to determine a target refrigeration mode of the air conditioning equipment according to the target equipment parameter value comprises:

[0025] When the current load rate value is in the second load rate interval, an initial suction gas superheat correction value, an initial evaporation temperature correction value, an initial indoor fan speed correction proportional coefficient value, or an initial refrigeration sensitivity correction value of the air conditioning equipment are determined;

[0026] According to the current humidity value, the initial suction gas superheat correction value is corrected to a second suction gas superheat correction value, the initial evaporation temperature correction value is gradually reduced to a second evaporation temperature correction value, the initial indoor fan speed correction proportional coefficient value is maintained as a second indoor fan speed correction proportional coefficient value, and the initial refrigeration sensitivity correction value is adjusted to a second refrigeration sensitivity correction value according to a second preset correction mode; the second suction gas superheat correction value is negatively correlated with the refrigeration capacity; the second evaporation temperature correction value is negatively correlated with the refrigeration capacity; the second indoor fan speed correction proportional coefficient value is positively correlated with the refrigeration capacity, and the second indoor fan speed correction proportional coefficient value is less than 1; and the second refrigeration sensitivity correction value is used to describe the sensitivity of maintaining the refrigeration mode, and the second refrigeration sensitivity correction value is equal to 1.

[0027] The target refrigeration mode is determined according to one or more of the second suction gas superheat correction value, the second evaporation temperature correction value, the second indoor fan speed correction proportional coefficient value, or the second refrigeration sensitivity correction value.

[0028] Optionally, the adjusting the current device parameter value of the air conditioning equipment to a target device parameter value to determine the target refrigeration mode of the air conditioning equipment according to the target device parameter value comprises:

[0029] When the current load rate value is located in the third load rate interval, an initial suction gas superheat correction value, an initial evaporation temperature correction value, an initial indoor fan speed correction proportional coefficient value, or an initial refrigeration sensitivity correction value of the air conditioning equipment is determined.

[0030] According to the current humidity value, the initial suction gas superheat correction value is set to a third suction gas superheat correction value, the initial evaporation temperature correction value is gradually reduced to a third evaporation temperature correction value, the initial indoor fan speed correction proportional coefficient value is maintained as a third indoor fan speed correction proportional coefficient value, and the initial refrigeration sensitivity correction value is adjusted to a third refrigeration sensitivity correction value according to a third preset correction mode; the third suction gas superheat correction value is negatively correlated with the refrigeration capacity; the third evaporation temperature correction value is negatively correlated with the refrigeration capacity; the third indoor fan speed correction proportional coefficient value is positively correlated with the refrigeration capacity, and the third indoor fan speed correction proportional coefficient value is equal to 1; and the third refrigeration sensitivity correction value is used to describe the sensitivity of maintaining the refrigeration mode, and the third refrigeration sensitivity correction value is less than 1.

[0031] The target refrigeration mode is determined according to one or more of the third suction gas superheat correction value, the third evaporation temperature correction value, the third indoor fan speed correction proportional coefficient value, or the third refrigeration sensitivity correction value.

[0032] Optionally, after the current humidity value of the compressor running the first refrigeration parameter in a preset time period is obtained, and it is determined whether the current humidity value meets a preset humidity value, the method further comprises:

[0033] When the current humidity value meets the preset humidity value, maintaining the compressor of the machine room system running the low-load refrigeration mode.

[0034] The second aspect of the embodiment of the present application provides a control system for low-load dehumidification of an air conditioner, comprising:

[0035] A starting unit is configured to start a low-load refrigeration mode of the compressor when a current load rate value of the air conditioner in the machine room system is in a first load rate interval, and configure a first refrigeration parameter of the compressor based on the low-load refrigeration mode.

[0036] An obtaining unit is configured to obtain a current humidity value of the compressor running the first refrigeration parameter in a preset time period, and determine whether the current humidity value meets a preset humidity value.

[0037] An adjusting unit is configured to adjust a current device parameter value of the air conditioner to a target device parameter value when the current humidity value does not meet the preset humidity value, so as to determine a target refrigeration mode of the air conditioner according to the target device parameter value.

[0038] The second aspect of the embodiment of the present application provides a control method for low-load dehumidification of an air conditioner.

[0039] The third aspect of the embodiment of the present application provides a control device for low-load dehumidification of an air conditioner, comprising:

[0040] A central processing unit, a memory, an input and output interface, a wired or wireless network interface, and a power supply;

[0041] The memory is a transient storage memory or a persistent storage memory.

[0042] The central processing unit is configured to communicate with the memory, and execute instruction operations in the memory to execute the control method for low-load dehumidification of an air conditioner in the first aspect.

[0043] The fourth aspect of the embodiment of the present application provides a computer readable storage medium, characterized in that the computer readable storage medium comprises instructions, when the instructions are executed on a computer, so that the computer executes the control method for low-load dehumidification of an air conditioner in the first aspect.

[0044] From the above technical solution can be seen, the application embodiment has the following advantages: by the air conditioner low load dehumidification control method disclosed in the application embodiment, when the current load rate value of the air conditioning equipment in the machine room system is in the first load rate interval, the low load refrigeration mode of the compressor is started, and the first refrigeration parameter of the compressor is configured based on the low load refrigeration mode; then the current humidity value of the compressor running the first refrigeration parameter in the preset time period is obtained, and whether the current humidity value meets the preset humidity value is judged; finally, when the current humidity value does not meet the preset humidity value, the current equipment parameter value of the air conditioning equipment is adjusted to the target equipment parameter value, so as to determine the target refrigeration mode of the air conditioning equipment according to the target equipment parameter value. Thus, when the machine room system needs to dehumidify, the refrigeration parameter of the compressor can be configured based on the refrigeration requirement, so that the compressor runs the related refrigeration mode to maintain the normal refrigeration operation of the air conditioning equipment. At the same time, the equipment parameter value of the air conditioning equipment is adjusted according to the humidity value after the compressor runs for a period of time, so as to avoid excessive dehumidification. BRIEF DESCRIPTION OF DRAWINGS

[0045] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments described in the present application, and other drawings can also be obtained by those skilled in the art according to these drawings.

[0046] Figure 1 The flowchart of the air conditioner low load dehumidification control method disclosed in the embodiment of the present application is shown in the figure.

[0047] Figure 2 The flowchart of another air conditioner low load dehumidification control method disclosed in the embodiment of the present application is shown in the figure.

[0048] Figure 3 The flowchart of another air conditioner low load dehumidification control method disclosed in the embodiment of the present application is shown in the figure.

[0049] Figure 4 The structure diagram of the air conditioner low load dehumidification control system disclosed in the embodiment of the present application is shown in the figure.

[0050] Figure 5 The structure diagram of the air conditioner low load dehumidification control device disclosed in the embodiment of the present application is shown in the figure. DETAILED DESCRIPTION

[0051] The terms "first", "second", "third", "fourth" and the like in the description and in the claims of the present application, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the use of these terms herein is to be construed as interchangeable in order to distinguish over the prior art where appropriate so as to cover any step or embodiment, including possible mixed circuitry and / or structures, of the embodiments described herein, unless otherwise indicated. Furthermore, the terms "comprising", "having", "containing", and "including", and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, product, or apparatus that comprises, has, contains, or includes an item or list of items who have the item or list does not include only those items regardless of whether other items are present or absent, but can also include other items not expressly listed or inherent to such process, method, system, product, or apparatus.

[0052] It should be noted that the terms "first", "second", and the like in the description and in the claims of the present application are used for the purpose of description and are not intended to indicate or imply that a specific order or sequence of steps is required, unless otherwise specifically indicated. Thus, unless specifically stated otherwise, the terms "first", "second", and the like are not intended to indicate or imply that a specific order or sequence of steps is required, unless otherwise specifically indicated. Thus, unless specifically stated otherwise, the terms "first", "second", and the like are not intended to indicate or imply that a specific order or sequence of steps is required, unless otherwise specifically indicated.

[0053] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0054] In a precision air conditioner, humidity is mainly adjusted by two parts. One is that when air passes through the surface of an evaporator, the water vapor in the air will liquefy because the temperature is lower than the dew point of water vapor, thereby reducing the humidity in the air. The other is that when the humidity is lower than the set value during the refrigeration process, a humidifier is turned on to humidify and ensure that the humidity is within the set range. Therefore, the process of dehumidification will inevitably be accompanied by a decrease in the ambient temperature, and the precision air conditioner has a large refrigeration capacity. At present, it is impossible to achieve constant temperature dehumidification simply and at low cost in the precision air conditioner system.

[0055] Since the rack air conditioner is placed in the integrated cabinet, the integrated system load rate can be collected and synchronized to the air conditioner, the actual load rate proportion is determined, and the humidity is determined according to the cold channel temperature and humidity sensor arranged on the spot, and the actual environment temperature and humidity sensor determines the actual environment temperature and humidity. Due to the strong penetration of humidity, in high humidity environment, it is easy to cause the same high humidity in the cabinet, which has some risks for actual server application. Among them, it is not difficult to understand that the actual load rate proportion refers to the ratio of the system load in the cabinet to the total load of the cabinet design. For the convenience of understanding and description, the following will not be described.

[0056] To solve the above technical problems, please refer to Figure 1 , Figure 1 A flowchart of a control method for air conditioner low-load dehumidification disclosed by an embodiment of the present application. It includes steps 101-103.

[0057] 101, when the current load rate value of the air conditioning equipment in the computer room system is in the first load rate interval, start the low-load refrigeration mode of the compressor, and configure the first refrigeration parameter of the compressor based on the low-load refrigeration mode.

[0058] Since the air conditioning equipment in the computer room system is generally placed in the integrated cabinet, the integrated system load rate can be collected and synchronized to the air conditioner, thus the current load rate value of the air conditioning equipment in the computer room system needs to be obtained to determine the load rate interval satisfied by the current load rate value. Thus, when the current load rate value of the air conditioning equipment in the computer room system is in the first load rate interval, start the low-load refrigeration mode of the compressor, and configure the first refrigeration parameter of the compressor based on the low-load refrigeration mode.

[0059] In one specific embodiment, the air conditioning equipment described above can be understood as an air conditioning system, and the compressor of the air conditioning system can realize computer room refrigeration, that is, output relevant refrigeration capacity to realize temperature change in the computer room. In addition, the effective operation of the air conditioner can also realize environmental dehumidification. It is not difficult to understand that the specific structure of the air conditioning system or the air conditioning equipment is not described here, only the specific functions realized by the air conditioning system or the air conditioning equipment are described, and the following will not be described. It is also necessary to say that the computer room system includes corresponding network servers or cabinets, etc., and the content contained in the computer room system is not limited here.

[0060] Based on the above embodiment, further, by acquiring the current system in the machine room, the system (mainly air conditioning) in the cabinet uses the load, the ratio of the total load of the cabinet design, thereby determining the current load rate value described above. Thus, when the current load rate value is in the first load rate interval, then the high return air temperature can be set, thereby starting the compressor to enter the low load refrigeration mode. Thus, based on the low load refrigeration mode, the refrigeration parameters of the compressor can be configured. It is not difficult to understand that the air conditioning equipment in the actual development process will make corresponding parameter setting for different extreme conditions, but the final open setting value is in the normal operating state, which has high stability. At the same time, the value of parameter correction or coefficient correction in the embodiment is mainly determined according to the experience value of the project during system development. Not limited here.

[0061] Further, in another implementable technical solution, in order to avoid the continuous correction of parameters leading to excessive dehumidification in the room, the running time of the air conditioner can be accumulated and calculated, and the amplitude adjustment is performed every certain time according to the running time, and the correction value is adjusted to 0 (for the variable adjustment parameter), thereby avoiding excessive dehumidification. For the convenience of understanding and description, this will not be described hereinafter.

[0062] 102, acquire the current humidity value of the compressor running the first refrigeration parameter in the preset time period, and determine whether the current humidity value meets the preset humidity value.

[0063] Based on step 101, the current humidity value of the compressor of the machine room system running in the low load refrigeration mode in the preset time period can be acquired, and whether the current humidity value meets the corresponding preset humidity value is determined.

[0064] In one specific embodiment, the cold channel temperature and humidity sensor in the machine room system can acquire the actual temperature and humidity of the air conditioning equipment after running for a period of time. Specifically, the corresponding cold channel temperature and humidity sensor acquires the humidity value in the current machine room, and compares the humidity value with the determination value of the preset humidity value to determine the size relationship between the humidity value and the preset humidity value.

[0065] Based on the above embodiment, in one of the implementable technical solutions, the cold channel temperature and humidity sensor acquires the current humidity value in the current machine room after the compressor of the air conditioning equipment runs for 2 hours, and then determines whether the current humidity value is less than 70%. It is not difficult to understand that 70% is the preset humidity value described above. It should be noted that the above description is only one specific implementation, and in other implementable ways, the corresponding preset humidity value can also be 60% or 80%, and the specific place is not limited.

[0066] 103. When the current humidity value does not meet the preset humidity value, adjust the current equipment parameter value of the air conditioner to the target equipment parameter value, so as to determine the target cooling mode of the air conditioner based on the target equipment parameter value.

[0067] Based on the determination in step 102, if the current humidity value does not meet the preset humidity value, the current device parameter value of the initial device can be adjusted to the target device parameter value, thereby determining the target cooling mode of the initial device according to the target device parameter value.

[0068] In one specific embodiment, based on step 103, when the current humidity value is less than 70%, the current parameter values ​​related to dehumidification and cooling of the air conditioning equipment can be adjusted to the target equipment parameter values ​​based on the relevant target load rate range. That is, the parameter values ​​are corrected by setting relevant correction values ​​to determine the target equipment parameter values. Therefore, the low-load cooling mode can be adjusted according to the target equipment parameter values ​​and then adjusted to the target cooling mode. The air conditioning equipment then operates in this target cooling mode to perform dehumidification and cooling operations. It is easy to understand that the current target cooling mode and the low-load cooling mode can belong to the same cooling mode, differing only in their parameter values. For ease of understanding, this will not be elaborated further below.

[0069] Based on the above embodiments, the correction value will be related to the load rate ratio and humidity. Once the lowest value of the ambient humidity and the cold aisle humidity is determined, if the lowest value is higher than the target value, the parameter correction value will be adjusted.

[0070] This embodiment discloses a control method for low-load dehumidification of an air conditioner. First, when the current load rate of the air conditioning equipment in the computer room system is within a first load rate range, the compressor's low-load cooling mode is activated, and based on this mode, the compressor's first cooling parameters are configured. Next, the current humidity value of the compressor operating within a preset time period using the first cooling parameters is obtained, and it is determined whether the current humidity value meets a preset humidity value. Finally, if the current humidity value does not meet the preset humidity value, the current equipment parameter value of the air conditioning equipment is adjusted to the target equipment parameter value, and the target cooling mode of the air conditioning equipment is determined based on this target parameter value. Therefore, when the computer room system requires dehumidification, the compressor can be configured with cooling parameters to operate in a relevant cooling mode according to the cooling demand, maintaining the normal cooling operation of the air conditioning equipment. Simultaneously, by adjusting the humidity value after the compressor has run for a period of time, the equipment parameter value of the air conditioning equipment is adjusted to avoid over-dehumidification.

[0071] For the convenience of understanding the above Figure 1 For a detailed description of the air conditioning low-load dehumidification control method described in [the document], please refer to [the document / reference]. Figure 2 , Figure 2Another flowchart of the control method for low-load dehumidification of an air conditioner is disclosed in the embodiments of the present application. The control method comprises steps 201-209.

[0072] 201、set a load rate interval less than or equal to a first load rate value as a first load rate interval, set a load rate interval greater than the first load rate value and less than or equal to a second load rate value as a second load rate interval, and set a load rate interval greater than the second load rate value as a third load rate interval.

[0073] To determine the load rate interval in which the current load rate value of the air conditioner is located, so as to facilitate subsequent determination. Specifically, set a load rate interval less than or equal to a first load rate value as a first load rate interval, set a load rate interval greater than the first load rate value and less than or equal to a second load rate value as a second load rate interval, and set a load rate interval greater than the second load rate value as a third load rate interval. It is not difficult to understand that the second load rate value is greater than the first load rate value.

[0074] In one specific embodiment, the load rate interval is set to three segments. One of them is that the first segment load rate interval is less than or equal to 30%, the second segment load rate interval is greater than 30% and less than or equal to 60%, and the third segment load rate interval is greater than 60%. In this embodiment, the first load rate value is 30% and the second load rate value is 60%. Thus, if the current load rate value is 25%, it can be determined that the current load rate value meets the first segment load rate interval.

[0075] 202、obtain the current load rate value of the air conditioner in the computer room system, and determine whether the current load rate value is less than or equal to the first load rate value.

[0076] Step 202 in the embodiment is similar to step 101 in the foregoing Figure 1 embodiment. Specifically, the current load rate value described in the foregoing embodiment can be determined by obtaining the ratio of the load used by the system in the cabinet (mainly the air conditioner) to the total load designed for the cabinet. Thus, based on the current load rate value obtained, it is determined whether the current load rate value is less than or equal to the first load rate value. In other words, it is determined whether the current load rate value is located in the first load rate interval.

[0077] In one specific embodiment, when the dynamic load rate value is obtained, it is first determined whether the dynamic load rate value is less than or equal to 30%. It is not difficult to understand that the dynamic load rate value is the current load rate value described in the foregoing embodiment, i.e., the ratio of the load used by the system in the cabinet to the total load designed for the cabinet. Correspondingly, "30%" is the first load rate value described in the foregoing embodiment.

[0078] It is understandable that the above is only one specific implementation, and in other implementable technical solutions, the first load rate value can also be 20% or 40%, etc., and the specific implementation is not limited here.

[0079] 203、When the current load rate value is less than or equal to the first load rate value, set the first return air temperature value and the first refrigeration demand value of the air conditioning equipment, control the first return air temperature value to change with time, and control the first refrigeration demand value to maintain in the first refrigeration demand interval.

[0080] Therefore, when the current load rate value is less than or equal to the first load rate value, it can be determined that the current load rate value is located in the first load rate interval. Thus, the first return air temperature value and the first refrigeration demand value of the air conditioning equipment can be set, so as to control the first return air temperature value to change with time, and control the first refrigeration demand value to maintain in the first refrigeration demand interval. In one specific embodiment, in combination with the description of step 201, it is understandable that the first load rate interval is the interval range of For the convenience of understanding, the first load rate interval will not be described again in the following.

[0081] In one specific embodiment, the adjustment is started when the lowest value after comparison between the humidity in the environment temperature and humidity and the humidity in the cold channel is higher than the target set humidity. For temperature, there is no judgment requirement, and the air conditioner is controlled according to the target set value on the return air side. Specifically, a high return air temperature is set, and a related refrigeration demand value is set accordingly.

[0082] Further, in one implementable technical solution, the specific way of low-load refrigeration or dehumidification is to start detection after a delay of 60s after the unit ends soft start or protection adjustment. If the following conditions are detected continuously for 30s: {all the actual frequencies of the compressors in the on state are ≤ (the minimum frequency of the variable frequency compressor + 5HZ)} & {the refrigeration demand ≤ -50%} & {the return air temperature change rate: }, the "low-load refrigeration & dehumidification" flag is activated, and the unit still displays the refrigeration (and refrigeration and humidification) mode; the reheater is turned on. In the dehumidification (and dehumidification and heating) mode, if the following conditions are detected continuously for 30s: {the refrigeration demand ≤ -50%} & {the return air temperature change rate: }, the "low-load refrigeration & dehumidification" flag is activated, and the unit still displays the dehumidification (and dehumidification and heating) mode. It is understandable that is the detection value of the return air temperature sensor in the n-th demand calculation period, is the detection value of the return air temperature sensor in the n-1-th demand calculation period. Thus, the air conditioning equipment can enter the corresponding low-load refrigeration mode.

[0083] Further, for the convenience of description in the following, in the running logic after the "low-load refrigeration & dehumidification" flag is activated, specifically,

[0084] A, if the low-load refrigeration & dehumidification flag is activated, and the low-load refrigeration & dehumidification exit condition is not met, the unit always remains in the activated state;

[0085] B, if the number of currently running compressors in the refrigeration & dehumidification mode is greater than or equal to 1, turn on all reheaters (no response when no reheater is configured), and the compressor continues to be controlled according to the refrigeration & dehumidification demand.

[0086] It should be noted that the above is the specific operation logic of the low-load refrigeration mode, and will not be described in detail hereinafter.

[0087] In another implementable technical solution, in the judgment of the low-load refrigeration or dehumidification exit condition, specifically,

[0088] A, in the refrigeration mode, after the soft start or protection adjustment of the unit is completed, start detection, and if the following conditions are detected for 120s: {the actual frequency of at least one compressor is greater than (the oil return frequency of the variable frequency compressor - 2HZ)} & {the refrigeration demand is less than or equal to 0%} & {the return air temperature change rate: }, exit the low-load refrigeration, and the corresponding flag is cleared;

[0089] B, in the dehumidification mode, if the following conditions are detected for 120s: {the refrigeration demand is greater than 50%} & {the return air temperature change rate: }, exit the low-load refrigeration, and the corresponding flag is cleared;

[0090] C, the unit is powered off and restarted.

[0091] Thus, the exit of the low-load refrigeration mode can be completed. For the convenience of understanding, this will not be described in detail hereinafter.

[0092] 204, start the low-load refrigeration mode of the compressor, and based on the low-load refrigeration mode, set the current working frequency of the compressor as the target working frequency, set the current refrigeration return air temperature difference of the compressor as the target refrigeration return air temperature difference, set the current oil return time of the compressor as the target oil return time, and set the current oil return frequency of the compressor as the target oil return frequency.

[0093] Based on the description of step 203, the relevant low-load refrigeration mode can be determined. Specifically, after setting the first return air temperature value and the first refrigeration demand value of the air conditioning device, the low-load refrigeration mode of the compressor can be started, and based on the low-load refrigeration mode, the current working frequency of the compressor is set to the target working frequency, the current refrigeration return air temperature difference of the compressor is set to the target refrigeration return air temperature difference, the current oil return time of the compressor is set to the target oil return time, and the current oil return frequency of the compressor is set to the target oil return frequency. It is not difficult to understand that the target working frequency is less than the current working frequency, the target refrigeration return air temperature difference is less than the current refrigeration return air temperature difference, the target oil return time is less than the current oil return time, and the target oil return frequency is greater than the current oil return frequency. The target working frequency is associated with the refrigerating capacity of the compressor, and the target refrigeration return air temperature difference, the target oil return time and the target oil return frequency are associated with the humidity value.

[0094] In one specific embodiment, the compressor operating frequency is adjusted from the lowest frequency (if the lowest frequency is 20 Hz, it is reduced to 20 Hz) according to the refrigeration demand, and then the refrigeration return air temperature difference is adjusted from 12℃ to 6℃. The main purpose is that the larger the previous return air temperature difference, the lower the air speed, and the lower the temperature. However, in the low-load mode, the humidity is too high because the outlet air temperature is too low. Therefore, the return air temperature difference is now adjusted to 6℃, the outlet air speed is higher, the outlet air temperature is larger, and the humidity is lower. After running for a period of time, the humidity is judged, and if it cannot meet the requirements, the next step of parameter adjustment is performed. Correspondingly, the oil return logic can be understood as follows: when the system is in long-term low-frequency operation, the oil return time is adjusted from the original normal 3 minutes to 2 minutes. The frequency reduction rate is changed from 0.2 Hz / s to 0.5 Hz / s (frequency reduction rate: the speed at which the frequency of the compressor decreases from the frequency at the previous time to the frequency at the next time).

[0095] It should be noted that when the oil is returned, the frequency of the compressor will suddenly increase. The sudden increase in the frequency of the compressor will cause the system to output too much cold energy, the outlet air temperature will be too low, and the humidity will be too high. Therefore, in this embodiment, the oil return frequency is reduced, i.e. the oil return time is shortened. At the same time, the speed at which the frequency of the compressor decreases from high frequency to low frequency at the end of oil return is also increased.

[0096] 205, acquire the current humidity value of the compressor running the first refrigeration parameter within a preset time period, and judge whether the current humidity value meets the preset humidity value. If the current humidity value meets the preset humidity value, step 209 is performed; if the current humidity value does not meet the preset humidity value, step 206 is performed.

[0097] In step 205 of this embodiment, the current humidity value of the compressor running the first refrigeration parameter within a preset time period is acquired, and whether the current humidity value meets the preset humidity value is judged. Figure 1The step 102 is similar to the step 102 in the embodiment, and details are not repeated here. It should be noted that in the embodiment, when the current humidity value meets the preset humidity value, the step 209 is performed; and when the current humidity value does not meet the preset humidity value, the step 206 is performed.

[0098] In one specific embodiment, after running for 2 hours, it is determined whether the current humidity value is less than 70%. If yes, it is determined that the preset humidity value is met, and the step 209 is performed; if no, it is determined that the preset humidity value is not met, and the step 206 is performed.

[0099] 206. When the current load rate value is in the first load rate interval, the initial suction superheat correction value, the initial evaporation temperature correction value, the initial indoor fan speed correction proportional coefficient value, or the initial refrigeration sensitivity correction value of the air conditioning equipment is determined.

[0100] Therefore, when the current load rate value is in the first load rate interval, the initial suction superheat correction value, the initial evaporation temperature correction value, the initial indoor fan speed correction proportional coefficient value, or the initial refrigeration sensitivity correction value of the current air conditioning equipment can be determined.

[0101] In one specific embodiment, the running parameters of the current air conditioning equipment are first determined, including but not limited to the suction superheat, the evaporation temperature, the indoor fan speed correction proportional coefficient, or the refrigeration sensitivity correction value. In the low-load refrigeration mode, the corresponding running parameters in the above-mentioned embodiments can also have related correction values, i.e., the initial suction superheat correction value, the initial evaporation temperature correction value, the initial indoor fan speed correction proportional coefficient value, or the initial refrigeration sensitivity correction value in the above-mentioned embodiments.

[0102] Based on the above-mentioned embodiments, it should be noted that the suction superheat correction value is negatively correlated with the refrigeration capacity; the evaporation temperature correction value is negatively correlated with the refrigeration capacity; the indoor fan speed correction proportional coefficient value is positively correlated with the refrigeration capacity; and the first refrigeration sensitivity correction value is used to maintain the refrigeration mode. Based on the above description, it is not difficult to understand that, corresponding to the suction superheat correction value, the larger the correction value, the smaller the superheat, the higher the actual evaporation temperature, and the smaller the refrigeration capacity. Corresponding to the evaporation temperature correction value, the larger the correction value, the higher the actual evaporation temperature, and the smaller the refrigeration capacity. Corresponding to the indoor fan speed correction coefficient, the larger the proportional coefficient, the higher the fan speed, and the higher the actual refrigeration capacity. Corresponding to the refrigeration sensitivity correction value, the larger the sensitivity correction value, the larger the actual refrigeration sensitivity range value, and the less likely to exit the refrigeration mode, which can ensure stable operation of the system. For the convenience of understanding and description, the suction superheat correction value, the evaporation temperature correction value, the indoor fan speed correction coefficient, or the refrigeration sensitivity correction value will not be described hereinafter.

[0103] 207、According to the current humidity value, the initial suction gas superheat correction value is gradually reduced to a first suction gas superheat correction value, the initial evaporation temperature correction value is gradually reduced to a first evaporation temperature correction value, the initial indoor fan speed correction proportional coefficient value is maintained as a first indoor fan speed correction proportional coefficient value, and the initial refrigeration sensitivity correction value is adjusted to a first refrigeration sensitivity correction value according to a first preset correction mode.

[0104] Therefore, according to the current humidity value, the initial suction gas superheat correction value is gradually reduced to a first suction gas superheat correction value, the initial evaporation temperature correction value is gradually reduced to a first evaporation temperature correction value, the initial indoor fan speed correction proportional coefficient value is maintained as a first indoor fan speed correction proportional coefficient value, and the initial refrigeration sensitivity correction value is adjusted to a first refrigeration sensitivity correction value according to a first preset correction mode. Based on the description of step 206, it is not difficult to understand that the first suction gas superheat correction value is negatively correlated with the refrigeration capacity; the first evaporation temperature correction value is negatively correlated with the refrigeration capacity; the first indoor fan speed correction proportional coefficient value is positively correlated with the refrigeration capacity, and the first indoor fan speed correction proportional coefficient value is less than 1; and the first refrigeration sensitivity correction value is used to maintain the sensitivity of the refrigeration mode, and the first refrigeration sensitivity correction value is greater than 1.

[0105] In one specific embodiment, when the current load rate value is less than or equal to 30% and the current humidity value is greater than 70%, the first suction gas superheat correction value can be set to -3, the first evaporation temperature correction value can be set to -3, the first indoor fan speed correction proportional coefficient value can be set to 0.3, and the first refrigeration sensitivity correction value can be set to +3. It is not difficult to understand that the above is only one specific implementation.

[0106] Based on the above embodiment, the above corresponding correction values are the final correction values. During the change of the correction values, if the condition is met, it remains unchanged. If it is not met, it continues to be gradually corrected, but in order to ensure the normal and stable operation of the unit, it cannot be infinitely reduced or increased. For example, the first suction gas superheat correction value is constantly -1 (initially 0), the first evaporation temperature correction value is constantly -1 (initially 0), the first indoor fan speed correction proportional coefficient value is maintained at 0.3, and the first refrigeration sensitivity correction value is +3.

[0107] 208、According to one or more of the first suction gas superheat correction value, the first evaporation temperature correction value, the first indoor fan speed correction proportional coefficient value, or the first refrigeration sensitivity correction value, determine the target refrigeration mode.

[0108] Therefore, based on one or more of the first suction gas superheat correction value, the first evaporation temperature correction value, the first indoor fan speed correction proportional coefficient value, or the first refrigeration sensitivity correction value set in step 207, the parameter value of the target refrigeration mode is determined.

[0109] In one specific embodiment, the final correction value is determined based on the various correction values set forth above. Thus, based on the parameter values set for the air conditioning system, the current device parameter values are adjusted to target device parameter values based on the corresponding correction values. It is not difficult to understand that the various parameter values of the target cooling mode are the target device parameter values, so that the air conditioning device runs the corresponding target cooling mode based on the target device parameter values.

[0110] Further, in the present embodiment, the target cooling mode can also be understood as a kind of low-load cooling mode, wherein the difference between the two can be the difference in device parameter values, or the difference in description, which will not be described here.

[0111] 209、When the current humidity value meets the preset humidity value, the compressor of the machine room system is maintained to run the low-load cooling mode.

[0112] When the current humidity value meets the preset humidity value, the machine room system is maintained to run the current cooling mode, i.e. the low-load cooling mode.

[0113] Based on steps 202-205, in one specific embodiment, when the current humidity value is less than 70%, the current state is maintained to run.

[0114] Further, the corresponding low-load cooling mode is maintained until the low-load cooling or dehumidification exit condition is met, which will not be described here.

[0115] Through the air conditioning low-load dehumidification control method disclosed in the embodiment, when the unit receives a signal from the ambient temperature and humidity, dehumidification is needed, the correction value of the related parameter is adjusted to meet the cabinet temperature and humidity, the air conditioning system refrigeration normal refrigeration operation under different humidity conditions. At the same time, it can also solve the problem of poor control of air conditioning low-load dehumidification in the machine room, and through the actual refrigeration capacity modification coefficient, the refrigeration capacity output and load matching of the air conditioner are guaranteed.

[0116] Further, in another implementable technical solution, the corresponding cooling mode is not the same under different load rate conditions. Correspondingly, based on the different determination conditions of step 202, the corresponding cooling mode also has differences. It needs to be pointed out in advance that, Figure 3 The embodiment shown is Figure 2 other implementable solutions after step 202 in the embodiment.

[0117] For convenience of description, please refer to Figure 3 , Figure 3 is another flowchart of the air conditioning low-load dehumidification control method disclosed in the embodiment. It includes steps 301-308.

[0118] 301、when the current load ratio value is in the second load ratio interval or the third load ratio interval, a second return air temperature value and a second refrigeration demand value are set, the second return air temperature value is controlled to change over time, and the second refrigeration demand value is controlled to maintain in the second refrigeration demand interval, so as to execute the standard refrigeration mode of the air conditioning equipment.

[0119] It should be noted that steps 303 and 305 in the embodiment are parallel solutions, and details are not described herein. However, it should be noted that in the embodiment, when the target load ratio interval is the second load ratio interval or the third load ratio interval, a second return air temperature value and a second refrigeration demand value are set, the second return air temperature value is controlled to change over time, and the second refrigeration demand value is controlled to maintain in the second refrigeration demand interval, so as to execute the standard refrigeration mode of the air conditioning equipment. Figure 2

[0120] In one specific embodiment, when the target load ratio interval is the second load ratio interval or the third load ratio interval, a suitable target return air temperature needs to be set, and normal refrigeration control is performed, so as to realize the standard refrigeration mode. It can be understood that the suitable target return air temperature is the second return air temperature value described in the above, and the corresponding second refrigeration demand value is the refrigeration demand value required when the normal refrigeration control is performed.

[0121] Based on the above steps, when the second load ratio interval is met, for example, the system load is 2kW, the actual design total load is 6kW, the load ratio is less than 60% but greater than 30%, the return air temperature is set to 28℃. The remaining air conditioning units are controlled according to their own operation logic to ensure that the temperature fluctuates up and down. There is no need to enter the low-load refrigeration mode, and the intermediate parameters will be adjusted only after it is determined that the humidity is greater than 70%.

[0122] When the third load ratio interval is met, the system load is 4kW, the actual design total load is 6kW, and the load ratio is greater than 60%. The return air temperature is set to 28℃. The remaining air conditioning units are controlled according to their own operation logic to ensure that the temperature fluctuates up and down. There is no need to enter the low-load refrigeration mode, and the intermediate parameters will be adjusted only after it is determined that the humidity is greater than 70%.

[0123] The specific control mode will be described in detail later, and details are not described herein.

[0124] 302、acquire the current humidity value of the compressor running the first refrigeration parameter in a preset time period, and determine whether the current humidity value meets a preset humidity value. If the current humidity value does not meet the preset humidity value, steps 303-305 or steps 306-308 are executed.

[0125] In the embodiment, step 302 is the same as the foregoing step 202. Figure 2 ​Step 205 is similar and will not be described in detail here. However, it should be noted that in this embodiment, when executing steps 303-305, the aforementioned current load rate value meets the second load rate range. When executing steps 306-306, the aforementioned current load rate value meets the third load rate range.

[0126] In another specific embodiment, if the current humidity value meets the preset humidity value, execute... Figure 2 Step 209.

[0127] 303. When the current load rate value is in the second load rate range, determine the initial suction superheat correction value, initial evaporation temperature correction value, initial internal fan speed correction ratio coefficient value, or initial cooling sensitivity correction value of the air conditioning equipment.

[0128] In this embodiment, step 303 is the same as described above. Figure 2 Step 206 is similar and will not be described in detail here. However, it should be noted that in this embodiment, when the target load rate range is the second load rate range, the initial suction superheat correction value, the initial evaporation temperature correction value, the initial internal fan speed correction coefficient value, or the initial cooling sensitivity correction value of the current air conditioning equipment can be determined.

[0129] 304. Based on the current humidity value, according to the second preset correction mode, reduce the initial intake superheat correction value to the second intake superheat correction value, gradually reduce the initial evaporation temperature correction value to the second evaporation temperature correction value, maintain the initial internal fan speed correction ratio coefficient value to the second internal fan speed correction ratio coefficient value, and adjust the initial cooling sensitivity correction value to the second cooling sensitivity correction value.

[0130] In this embodiment, step 304 is the same as described above. Figure 2 Step 207 is similar and will not be elaborated here. However, it should be noted that in one specific embodiment, when the current load rate is greater than 30% and less than or equal to 60%, and the current humidity is greater than 70%, the second suction superheat correction value can be set to -1, the second evaporation temperature correction value to -3, the second internal fan speed correction ratio coefficient to 0.6, and the second cooling sensitivity correction value to +1. It is easy to understand that the above is only one specific achievable method.

[0131] Based on the above embodiments, the corresponding correction values ​​are the final correction values. During the change of correction values, if the conditions are met, they remain unchanged. If not, they continue to be gradually corrected, but to ensure the normal and stable operation of the unit, they cannot be infinitely reduced or increased. For example, the second suction superheat correction value is set to -1, the first evaporation temperature correction value continuously decreases by 1 (initially 0), the first internal fan speed correction coefficient remains at 0.6, and the first cooling sensitivity correction value increases by 1.

[0132] In one of the implementable technical solutions, the second suction gas superheat correction value is negatively correlated with the refrigerating capacity; the second evaporation temperature correction value is negatively correlated with the refrigerating capacity; the second indoor fan rotating speed correction proportional coefficient value is positively correlated with the refrigerating capacity; and the second refrigeration sensitivity correction value is used to maintain the refrigeration mode.

[0133] 305. Determine the target refrigeration mode according to one or more of the second suction gas superheat correction value, the second evaporation temperature correction value, the second indoor fan rotating speed correction proportional coefficient value, or the second refrigeration sensitivity correction value.

[0134] The step 305 in the embodiment is similar to the step 208 in the foregoing Figure 2 embodiment, and will not be described here in detail. It should be noted that the parameter value of the target refrigeration mode is determined based on one or more of the second suction gas superheat correction value, the second evaporation temperature correction value, the second indoor fan rotating speed correction proportional coefficient value, or the second refrigeration sensitivity correction value set in the step 306.

[0135] In one of the specific embodiments, the final correction value is determined based on the correction values set in the foregoing

[0136] 306. When the target load rate interval is the third load rate interval, determine the initial suction gas superheat correction value, the initial evaporation temperature correction value, the initial indoor fan rotating speed correction proportional coefficient value, or the initial refrigeration sensitivity correction value of the air conditioning device.

[0137] The step 306 in the embodiment is similar to the step 206 in the foregoing Figure 2 embodiment, and will not be described here in detail. It should be noted that in the embodiment, when the target load rate interval is the third load rate interval, the initial suction gas superheat correction value, the initial evaporation temperature correction value, the initial indoor fan rotating speed correction proportional coefficient value, or the initial refrigeration sensitivity correction value of the current air conditioning device can be determined.

[0138] 307. According to the current humidity value, set the initial suction gas superheat correction value as the third suction gas superheat correction value, gradually reduce the initial evaporation temperature correction value to the third evaporation temperature correction value, maintain the initial indoor fan rotating speed correction proportional coefficient value as the third indoor fan rotating speed correction proportional coefficient value, and adjust the initial refrigeration sensitivity correction value as the third refrigeration sensitivity correction value according to the third preset correction mode.

[0139] The step 307 in the embodiment is similar to the step 207 in the foregoing Figure 2The step 207 is similar to the step 207 in the embodiment 1, and details are not repeated here. It should be noted that in one of the embodiments, when the current load ratio value is greater than 60% and the current humidity value is greater than 70%, the third suction gas superheat correction value is set to 0, the third evaporation temperature correction value is set to -3, the third indoor fan speed correction proportional coefficient value is set to 1, and the third refrigeration sensitivity correction value is set to -1. It can be understood that the above is only one of the possible implementations.

[0140] Based on the above embodiments, the corresponding correction values are the final correction values. During the correction value change process, if the condition is met, it remains unchanged. If it is not met, it continues to be gradually corrected, but in order to ensure the normal and stable operation of the unit, the correction value cannot be infinitely reduced or increased. For example, the third suction gas superheat correction value is set to 0, the first evaporation temperature correction value is constantly -1 (initially 0), the first indoor fan speed correction proportional coefficient value is kept at 1, and the first refrigeration sensitivity correction value is -1.

[0141] In one of the possible technical solutions, the third suction gas superheat correction value is negatively correlated with the refrigeration capacity; the third evaporation temperature correction value is negatively correlated with the refrigeration capacity; the third indoor fan speed correction proportional coefficient value is positively correlated with the refrigeration capacity; and the third refrigeration sensitivity correction value is used to maintain the refrigeration mode.

[0142] For the convenience of describing the correlation between the load ratio value, the humidity value, the suction gas superheat correction value, the evaporation temperature correction value, the indoor fan speed correction proportional coefficient value, and the refrigeration sensitivity correction value described in the above Figure 2 and Figure 3 , please refer to Table 1.

[0143]

[0144] As can be seen from Table 1, under different load conditions and humidity conditions, the correction values in Table 1 are the final correction values required to be achieved, but during the correction value change process, if the relevant refrigeration mode or humidity condition is met, it remains unchanged. If it is not met, it continues to be gradually corrected. It can be understood that in order to ensure the normal and stable operation of the unit, the correction value cannot be infinitely reduced or increased. Details are not repeated here.

[0145] 308. Determine the target refrigeration mode according to one or more of the third suction gas superheat correction value, the third evaporation temperature correction value, the third indoor fan speed correction proportional coefficient value, or the third refrigeration sensitivity correction value.

[0146] The step 308 in the embodiment is similar to the step 308 in the embodiment 1, and details are not repeated here. Figure 2The step 208 is similar to the step 208, and details are not repeated here. It should be noted that the parameter value of the target refrigeration mode is determined based on one or more of the third suction superheat correction value, the third evaporation temperature correction value, the third internal fan speed correction proportional coefficient value, or the third refrigeration sensitivity correction value set in the step 307.

[0147] In one specific embodiment, the final correction value is determined based on the above-mentioned various correction values. Thus, based on the parameter value set by the initial air conditioning system, the current device parameter value is adjusted to the target device parameter value based on the corresponding correction value. It is not difficult to understand that the various parameter values of the target refrigeration mode are the target device parameter values, so that the air conditioning device operates the corresponding target refrigeration mode based on the target device parameter values.

[0148] Through the control system for air conditioner low-load dehumidification disclosed in the embodiment, different correction values of dehumidification parameters are set for different load rates of the air conditioning device under different conditions, so that the indoor temperature and humidity and the normal refrigeration operation of the air conditioning system are met under different humidity conditions and load conditions, and the realizability of the scheme is improved.

[0149] It should be understood that although each step in the flowchart involved in each embodiment described above is displayed in sequence according to the arrow, these steps are not necessarily executed in the order indicated by the arrow. Unless otherwise stated herein, the execution of these steps is not strictly limited in sequence, and these steps can be executed in other orders. Moreover, at least part of the steps in the flowchart involved in each embodiment described above can include multiple steps or stages, which are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily sequential, but can be executed in rotation or alternation with at least part of other steps or steps or stages in other steps.

[0150] Please refer to Figure 4 , Figure 4 The structure diagram of the control system for air conditioner low-load dehumidification disclosed in the embodiment of the application is shown.

[0151] The starting unit 401 is configured to start the low-load refrigeration mode of the compressor when the current load rate value of the air conditioning device in the computer room system is in the first load rate interval, and configure the first refrigeration parameter of the compressor based on the low-load refrigeration mode.

[0152] The acquisition unit 402 is configured to acquire the current humidity value of the compressor running the first refrigeration parameter in a preset time period, and determine whether the current humidity value meets the preset humidity value.

[0153] The adjusting unit 403 is configured to adjust a current device parameter value of the air conditioning equipment to a target device parameter value when the current humidity value does not satisfy the preset humidity value, so as to determine a target refrigeration mode of the air conditioning equipment according to the target device parameter value.

[0154] Exemplarily, the system further comprises a setting unit 404.

[0155] The setting unit 404 is configured to set the current working frequency of the compressor to a target working frequency, set the current refrigeration return air temperature difference of the compressor to a target refrigeration return air temperature difference, set the current oil return time length of the compressor to a target oil return time length, and set the current oil return frequency of the compressor to a target oil return frequency; wherein the target working frequency is less than the current working frequency, the target refrigeration return air temperature difference is less than the current refrigeration return air temperature difference, the target oil return time length is less than the current oil return time length, the target oil return frequency is greater than the current oil return frequency, the target working frequency is associated with the refrigerating capacity of the compressor, and the target refrigeration return air temperature difference, the target oil return time length and the target oil return frequency are associated with the humidity value.

[0156] Exemplarily, the system further comprises:

[0157] The setting unit 404 is further configured to set a load rate interval less than or equal to a first load rate value as a first load rate interval, set a load rate interval greater than the first load rate value and less than or equal to a second load rate value as a second load rate interval, and set a load rate interval greater than the second load rate value as a third load rate interval; wherein the second load rate value is greater than the first load rate value.

[0158] The obtaining unit 402 is further configured to obtain a current load rate value of the air conditioning equipment in the machine room system, and determine whether the current load rate value is less than or equal to the first load rate value.

[0159] The setting unit 404 is further configured to set a first return air temperature value and a first refrigeration demand value of the air conditioning equipment when the current load rate value is less than or equal to the first load rate value, control the first return air temperature value to change with time, control the first refrigeration demand value to maintain in a first refrigeration demand interval, and execute the step of starting the low-load refrigeration mode of the compressor.

[0160] Exemplarily, the system further comprises a determining unit 405.

[0161] The determining unit 405 is configured to determine that the current load rate value is located in the second load rate interval or the third load rate interval when the current load rate value is greater than the first load rate value.

[0162] The setting unit 404 is further configured to set a second return air temperature value and a second refrigeration demand value according to the second load rate interval or the third load rate interval, control the second return air temperature value to change over time, control the second refrigeration demand value to maintain in a second refrigeration demand interval, start a standard refrigeration mode of the compressor, and configure a second refrigeration parameter of the compressor based on the standard refrigeration mode; the second return air temperature value is less than the first return air temperature value, and the second refrigeration demand value is greater than the first refrigeration demand value.

[0163] Exemplarily, the system comprises:

[0164] The determining unit 405 is specifically configured to determine an initial suction superheat correction value, an initial evaporation temperature correction value, an initial indoor fan speed correction proportional coefficient value, or an initial refrigeration sensitivity correction value of the air conditioning equipment when the current load rate value is located in the first load rate interval.

[0165] The adjusting unit 403 is specifically configured to gradually reduce the initial suction superheat correction value to a first suction superheat correction value, gradually reduce the initial evaporation temperature correction value to a first evaporation temperature correction value, maintain the initial indoor fan speed correction proportional coefficient value as a first indoor fan speed correction proportional coefficient value, and adjust the initial refrigeration sensitivity correction value to a first refrigeration sensitivity correction value according to the current humidity value in a first preset correction mode; the first suction superheat correction value is negatively correlated with the refrigeration capacity; the first evaporation temperature correction value is negatively correlated with the refrigeration capacity; the first indoor fan speed correction proportional coefficient value is positively correlated with the refrigeration capacity, and the first indoor fan speed correction proportional coefficient value is less than 1; and the first refrigeration sensitivity correction value is used to describe the sensitivity of maintaining the refrigeration mode, and the first refrigeration sensitivity correction value is greater than 1.

[0166] The determining unit 405 is further configured to determine the target refrigeration mode according to one or more of the first suction superheat correction value, the first evaporation temperature correction value, the first indoor fan speed correction proportional coefficient value, or the first refrigeration sensitivity correction value.

[0167] Exemplarily, the system comprises:

[0168] The determining unit 405 is specifically configured to determine an initial suction superheat correction value, an initial evaporation temperature correction value, an initial indoor fan speed correction proportional coefficient value, or an initial refrigeration sensitivity correction value of the air conditioning equipment when the current load rate value is located in the second load rate interval.

[0169] The adjusting unit 403 is specifically configured to correct, according to the current humidity value, the initial suction superheat correction value to a second suction superheat correction value, gradually reduce the initial evaporation temperature correction value to a second evaporation temperature correction value, maintain the initial indoor fan speed correction proportional coefficient value as a second indoor fan speed correction proportional coefficient value, and adjust the initial refrigeration sensitivity correction value to a second refrigeration sensitivity correction value according to a second preset correction mode; wherein the second suction superheat correction value is negatively correlated with the refrigeration capacity; the second evaporation temperature correction value is negatively correlated with the refrigeration capacity; the second indoor fan speed correction proportional coefficient value is positively correlated with the refrigeration capacity, and the second indoor fan speed correction proportional coefficient value is less than 1; and the second refrigeration sensitivity correction value is used to describe the sensitivity of maintaining the refrigeration mode, and the second refrigeration sensitivity correction value is equal to 1.

[0170] The determining unit 405 is further configured to determine the target refrigeration mode according to one or more of the second suction superheat correction value, the second evaporation temperature correction value, the second indoor fan speed correction proportional coefficient value, or the second refrigeration sensitivity correction value.

[0171] Exemplarily, the system comprises:

[0172] The determining unit 405 is specifically configured to determine the initial suction superheat correction value, the initial evaporation temperature correction value, the initial indoor fan speed correction proportional coefficient value, or the initial refrigeration sensitivity correction value of the air conditioning device when the current load rate value is located in the third load rate interval.

[0173] The adjusting unit 403 is specifically configured to correct, according to the current humidity value, the initial suction superheat correction value to a third suction superheat correction value, gradually reduce the initial evaporation temperature correction value to a third evaporation temperature correction value, maintain the initial indoor fan speed correction proportional coefficient value as a third indoor fan speed correction proportional coefficient value, and adjust the initial refrigeration sensitivity correction value to a third refrigeration sensitivity correction value according to a third preset correction mode; wherein the third suction superheat correction value is negatively correlated with the refrigeration capacity; the third evaporation temperature correction value is negatively correlated with the refrigeration capacity; the third indoor fan speed correction proportional coefficient value is positively correlated with the refrigeration capacity, and the third indoor fan speed correction proportional coefficient value is equal to 1; and the third refrigeration sensitivity correction value is used to describe the sensitivity of maintaining the refrigeration mode, and the third refrigeration sensitivity correction value is less than 1.

[0174] The determining unit 405 is further configured to determine the target refrigeration mode according to one or more of the third suction superheat correction value, the third evaporation temperature correction value, the third indoor fan speed correction proportional coefficient value, or the third refrigeration sensitivity correction value.

[0175] Exemplarily, the system further comprises a maintaining unit 406.

[0176] The maintaining unit 406 is configured to maintain the compressor of the machine room system in the low-load refrigeration mode when the current humidity value meets the preset humidity value.

[0177] Please refer to Figure 5 The structure diagram of the control device for low-load dehumidification of the air conditioner disclosed in the embodiments of the present application includes:

[0178] The central processing unit 501, the memory 505, the input and output interface 504, the wired or wireless network interface 503 and the power supply 502;

[0179] The memory 505 is a temporary storage memory or a persistent storage memory.

[0180] The central processing unit 501 is configured to communicate with the memory 505 and execute the instruction operation in the memory 505 to perform the control method for low-load dehumidification of the air conditioner in any one of the embodiments described above. Figures 1 to 3

[0181] The embodiments of the present application also provide a chip system, characterized by comprising at least one processor and a communication interface, the communication interface and the at least one processor are interconnected through a line, and the at least one processor is used to run a computer program or an instruction to execute the control method for low-load dehumidification of the air conditioner in any one of the embodiments described above. Figures 1 to 3

[0182] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the system, device and unit described above can refer to the corresponding processes in the foregoing method embodiments, which will not be described here.

[0183] In the several embodiments provided in the present application, it should be understood that the disclosed system, device and method can be implemented by other ways. For example, the device embodiments described above are only schematic, and the division of the units is only a logical function division, and there can be another division way in actual implementation, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units shown or discussed can be indirect coupling or communication connection through some interfaces, devices or units, and can be electrical, mechanical or other forms.

[0184] The units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, that is, they can be located in one place, or can be distributed on a plurality of network units. According to actual needs, part or all of the units can be selected to achieve the purpose of the embodiments of the present application.

[0185] ​​In addition, each function unit in each embodiment of the present application can be integrated in one processing unit, or each unit can be physically present separately, or two or more units can be integrated in one unit. The integrated unit can be realized in the form of hardware or in the form of a software function unit.

[0186] When the integrated unit is realized in the form of a software function unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solutions of the present application, essentially or in the form of a contribution to the prior art, or all or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium, and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in each embodiment of the present application. The aforementioned storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM, read-only memory), a random access memory (RAM, random access memory), a magnetic disk or an optical disk, and various media that can store program codes.

Claims

1. A control method of an air conditioner low load dehumidification, characterized by, The method is applied to an air conditioning device comprising a compressor, and comprises the following steps: when a current load rate value of the air conditioning device in a machine room system is in a first load rate interval, starting a low-load refrigeration mode of the compressor, and configuring a first refrigeration parameter of the compressor based on the low-load refrigeration mode; obtaining a current humidity value of the compressor running the first refrigeration parameter in a preset time period, and determining whether the current humidity value is less than a preset humidity value; if the current humidity value is greater than or equal to the preset humidity value, adjusting a current device parameter value of the air conditioning device to a target device parameter value, so as to determine a target refrigeration mode of the air conditioning device according to the target device parameter value, and performing dehumidification refrigeration; before the steps of starting the low-load refrigeration mode of the compressor and configuring the first refrigeration parameter of the compressor based on the low-load refrigeration mode, the method further comprises the following steps: setting a load rate interval less than or equal to a first load rate value as the first load rate interval, setting a load rate interval greater than the first load rate value and less than or equal to a second load rate value as a second load rate interval, and setting a load rate interval greater than the second load rate value as a third load rate interval; wherein the second load rate value is greater than the first load rate value; obtaining the current load rate value of the air conditioning device in the machine room system, and determining whether the current load rate value is less than or equal to the first load rate value; when the current load rate value is less than or equal to the first load rate value, setting a first return air temperature value and a first refrigeration demand value of the air conditioning device, controlling the first return air temperature value to change over time, controlling the first refrigeration demand value to maintain in a first refrigeration demand interval, and executing the step of starting the low-load refrigeration mode of the compressor; the method further comprises the following steps: when the current load rate value is greater than the first load rate value, determining that the current load rate value is in the second load rate interval or the third load rate interval; according to the second load rate interval or the third load rate interval, setting a second return air temperature value and a second refrigeration demand value, controlling the second return air temperature value to change over time, controlling the second refrigeration demand value to maintain in a second refrigeration demand interval, starting a standard refrigeration mode of the compressor, and configuring a second refrigeration parameter of the compressor based on the standard refrigeration mode; wherein the second return air temperature value is less than the first return air temperature value, and the second refrigeration demand value is greater than the first refrigeration demand value.

2. The control method of claim 1, wherein, the step of configuring the first refrigeration parameter of the compressor comprises the following steps: set the current working frequency of the compressor as a target working frequency, set the current refrigeration supply-return air temperature difference of the compressor as a target refrigeration supply-return air temperature difference, set the current oil return time length of the compressor as a target oil return time length, and set the current oil return frequency of the compressor as a target oil return frequency; the target working frequency is less than the current working frequency, the target refrigeration supply-return air temperature difference is less than the current refrigeration supply-return air temperature difference, the target oil return time length is less than the current oil return time length, and the target oil return frequency is greater than the current oil return frequency; the target working frequency is associated with the refrigerating capacity of the compressor, and the target refrigeration supply-return air temperature difference, the target oil return time length, and the target oil return frequency are associated with the humidity value.

3. The control method of claim 1, wherein, The adjusting the current device parameter value of the air conditioning equipment as a target device parameter value comprises: when the current load rate value is located in the first load rate interval, determining an initial suction gas superheat correction value, an initial evaporation temperature correction value, an initial indoor fan speed correction proportional coefficient value, or an initial refrigeration sensitivity correction value of the air conditioning equipment; according to the current humidity value, gradually reducing the initial suction gas superheat correction value to a first suction gas superheat correction value, gradually reducing the initial evaporation temperature correction value to a first evaporation temperature correction value, maintaining the initial indoor fan speed correction proportional coefficient value as a first indoor fan speed correction proportional coefficient value, and adjusting the initial refrigeration sensitivity correction value as a first refrigeration sensitivity correction value according to a first preset correction mode; the first suction gas superheat correction value is negatively correlated with the refrigerating capacity; the first evaporation temperature correction value is negatively correlated with the refrigerating capacity; the first indoor fan speed correction proportional coefficient value is positively correlated with the refrigerating capacity, and the first indoor fan speed correction proportional coefficient value is less than 1; and the first refrigeration sensitivity correction value is used to describe the sensitivity of maintaining the refrigeration mode, and the first refrigeration sensitivity correction value is greater than 1; determining the target refrigeration mode according to one or more of the first suction gas superheat correction value, the first evaporation temperature correction value, the first indoor fan speed correction proportional coefficient value, or the first refrigeration sensitivity correction value.

4. The control method of claim 1, wherein, The adjusting the current device parameter value of the air conditioning equipment as a target device parameter value comprises: when the current load rate value is located in the second load rate interval, determining an initial suction gas superheat correction value, an initial evaporation temperature correction value, an initial indoor fan speed correction proportional coefficient value, or an initial refrigeration sensitivity correction value of the air conditioning equipment; According to the current humidity value, the initial suction gas superheat correction value is corrected to a second suction gas superheat correction value, the initial evaporation temperature correction value is gradually reduced to a second evaporation temperature correction value, the initial indoor fan speed correction proportional coefficient value is maintained as a second indoor fan speed correction proportional coefficient value, and the initial refrigeration sensitivity correction value is adjusted to a second refrigeration sensitivity correction value according to a second preset correction mode; wherein the second suction gas superheat correction value is negatively correlated with the refrigeration capacity; the second evaporation temperature correction value is negatively correlated with the refrigeration capacity; the second indoor fan speed correction proportional coefficient value is positively correlated with the refrigeration capacity, and the second indoor fan speed correction proportional coefficient value is less than 1; and the second refrigeration sensitivity correction value is used to describe the sensitivity of maintaining the refrigeration mode, and the second refrigeration sensitivity correction value is equal to 1. The target refrigeration mode is determined according to one or more of the second suction gas superheat correction value, the second evaporation temperature correction value, the second indoor fan speed correction proportional coefficient value, or the second refrigeration sensitivity correction value.

5. The control method of claim 1, wherein, The method further comprises: When the current load rate value is located in the third load rate interval, an initial suction gas superheat correction value, an initial evaporation temperature correction value, an initial indoor fan speed correction proportional coefficient value, or an initial refrigeration sensitivity correction value of the air conditioning equipment is determined; According to the current humidity value, the initial suction gas superheat correction value is corrected to a third suction gas superheat correction value, the initial evaporation temperature correction value is gradually reduced to a third evaporation temperature correction value, the initial indoor fan speed correction proportional coefficient value is maintained as a third indoor fan speed correction proportional coefficient value, and the initial refrigeration sensitivity correction value is adjusted to a third refrigeration sensitivity correction value according to a third preset correction mode; wherein the third suction gas superheat correction value is negatively correlated with the refrigeration capacity; the third evaporation temperature correction value is negatively correlated with the refrigeration capacity; the third indoor fan speed correction proportional coefficient value is positively correlated with the refrigeration capacity, and the third indoor fan speed correction proportional coefficient value is equal to 1; and the third refrigeration sensitivity correction value is used to describe the sensitivity of maintaining the refrigeration mode, and the third refrigeration sensitivity correction value is less than 1. The target refrigeration mode is determined according to one or more of the third suction gas superheat correction value, the third evaporation temperature correction value, the third indoor fan speed correction proportional coefficient value, or the third refrigeration sensitivity correction value.

6. The control method of claim 1, wherein, After the current humidity value of the compressor running the first refrigeration parameter in a preset time period is obtained, and it is determined whether the current humidity value meets a preset humidity value, the method further comprises: When the current humidity value is less than the preset humidity value, the compressor of the machine room system is maintained to run the low-load refrigeration mode.

7. A control system for low load dehumidification of an air conditioner, characterized by, The system is applied to an air conditioning equipment, and the air conditioning equipment comprises a compressor. The starting unit is configured to start a low-load refrigeration mode of the compressor when a current load rate value of the air conditioning equipment in the machine room system is in a first load rate interval, and configure a first refrigeration parameter of the compressor based on the low-load refrigeration mode. The obtaining unit is configured to obtain a current humidity value of the first refrigeration parameter of the compressor in a preset time period, and determine whether the current humidity value is less than a preset humidity value. The adjusting unit is configured to adjust a current equipment parameter value of the air conditioning equipment to a target equipment parameter value when the current humidity value is greater than or equal to the preset humidity value, to determine a target refrigeration mode of the air conditioning equipment according to the target equipment parameter value, and to perform dehumidification refrigeration. The setting unit is further configured to set a load rate interval less than or equal to a first load rate value as the first load rate interval, set a load rate interval greater than the first load rate value and less than or equal to a second load rate value as a second load rate interval, and set a load rate interval greater than the second load rate value as a third load rate interval, wherein the second load rate value is greater than the first load rate value. The obtaining unit is further configured to obtain the current load rate value of the air conditioning equipment in the machine room system, and determine whether the current load rate value is less than or equal to the first load rate value. The setting unit is further configured to set a first return air temperature value and a first refrigeration demand value of the air conditioning equipment when the current load rate value is less than or equal to the first load rate value, control the first return air temperature value to change over time, control the first refrigeration demand value to maintain in a first refrigeration demand interval, and perform the step of starting the low-load refrigeration mode of the compressor. The system further comprises a determining unit. The determining unit is configured to determine that the current load rate value is located in the second load rate interval or the third load rate interval when the current load rate value is greater than the first load rate value. The setting unit is further configured to set a second return air temperature value and a second refrigeration demand value according to the second load rate interval or the third load rate interval, control the second return air temperature value to change over time, control the second refrigeration demand value to maintain in a second refrigeration demand interval, start a standard refrigeration mode of the compressor, and configure a second refrigeration parameter of the compressor based on the standard refrigeration mode, wherein the second return air temperature value is less than the first return air temperature value, and the second refrigeration demand value is greater than the first refrigeration demand value.

8. A control device for low-load dehumidification of an air conditioner, characterized in that, The device comprises: a central processor, a memory, an input-output interface, a wired or wireless network interface, and a power supply; the memory is a transient storage memory or a persistent storage memory; the central processor is configured to communicate with the memory and execute instruction operations in the memory to perform the control method for air conditioner low-load dehumidification in any one of claims 1 to 6.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium comprises instructions which, when executed on a computer, cause the computer to perform the control method for air conditioner low-load dehumidification in any one of claims 1 to 6.

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