Liquid chiller control methods, systems, devices, and non-volatile storage media

Abstract

This invention provides a control method, system, device, and non-volatile storage medium for a liquid-cooled chiller unit. The control method includes: acquiring the ambient temperature value of the liquid-cooled chiller unit; determining a corresponding ambient temperature range based on the ambient temperature value; determining a corresponding adjustment target value based on the ambient temperature range; and adjusting the operation of the compressor and / or fan of the liquid-cooled chiller unit according to the adjustment target value. The technical solution provided by this invention can solve the technical problem of low energy efficiency in existing energy storage liquid-cooled chiller units.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of liquid cooling unit, in particular to a liquid cooling unit control method, system and device and a nonvolatile storage medium. BACKGROUND

[0002] At present, in order to improve the energy efficiency of the energy storage liquid cooling unit, the common improvement methods include using high energy efficiency compressor and increasing the area of heat exchanger.

[0003] However, these common energy efficiency improvement methods not only improve the energy efficiency of the unit, but also increase the cost of the unit. At the same time, the conventional control method of the energy storage liquid cooling unit usually only performs single adjustment in the compressor frequency adjustment, only focuses on the control of the compressor as one load, and ignores the joint control with other structural components in the liquid cooling unit, so that the overall unit cannot be kept in the best energy efficiency state. SUMMARY

[0004] The main purpose of the present application is to provide a liquid cooling unit control method, system, device and nonvolatile storage medium to solve the technical problem of low energy efficiency of the existing energy storage liquid cooling unit.

[0005] In order to achieve the above purpose, according to one aspect of the present application, a liquid cooling unit control method is provided, comprising:

[0006] Obtaining an environmental temperature value of the working liquid cooling unit;

[0007] Determining a corresponding environmental temperature interval according to the environmental temperature value;

[0008] Determining a corresponding adjustment target value according to the environmental temperature interval, and adjusting the running condition of the compressor and / or fan of the liquid cooling unit according to the adjustment target value.

[0009] Further, the adjustment target value includes a target frequency value of the compressor of the liquid cooling unit and / or a target rotating speed value of the fan of the liquid cooling unit; adjusting the running condition of the compressor and / or fan of the liquid cooling unit according to the adjustment target value, comprising:

[0010] Adjusting the running frequency of the compressor according to the target frequency value of the compressor; and / or,

[0011] Adjusting the rotating speed of the fan according to the target rotating speed value of the fan; and / or,

[0012] Determining a current condensing temperature value according to the target frequency value of the compressor, and adjusting the rotating speed of the fan according to the current condensing temperature value.

[0013] Further, the adjustment target value comprises a target frequency value of a compressor of the liquid-cooled unit; the corresponding adjustment target value is determined according to the environmental temperature interval, comprising:

[0014] The operating frequency range of the compressor is determined according to the environmental temperature interval;

[0015] The target frequency value is determined within the operating frequency range of the compressor.

[0016] Further, the target frequency value determined within the operating frequency range of the compressor is the adjustment target value, comprising:

[0017] The energy efficiency ratio corresponding to each frequency value in the operating frequency range is obtained;

[0018] The energy efficiency ratio is compared with a preset energy efficiency ratio to obtain an optimal frequency value with an energy efficiency ratio greater than the preset energy efficiency ratio;

[0019] The target frequency value is determined according to the optimal frequency value.

[0020] Further, the adjustment target value is determined according to the optimal frequency value, comprising:

[0021] In the case of one optimal frequency value, the optimal frequency value is determined as the target frequency value; and / or,

[0022] In the case of multiple optimal frequency values, an actual operating frequency value of the compressor is obtained;

[0023] The actual operating frequency value is compared with the optimal frequency value greater than the actual operating frequency value among the optimal frequency values to obtain a first optimal frequency value with the smallest difference from the actual operating frequency value; and the actual operating frequency value is compared with the optimal frequency value less than the actual operating frequency value among the optimal frequency values to obtain a second optimal frequency value with the smallest difference from the actual operating frequency value;

[0024] In the case of needing to increase the operating frequency of the compressor, the first optimal frequency value is determined as the target frequency value; in the case of needing to decrease the operating frequency of the compressor, the second optimal frequency value is determined as the target frequency value.

[0025] Further, the control method further comprises:

[0026] An actual liquid supply temperature value of the liquid-cooled unit is obtained, and a temperature difference value between the actual liquid supply temperature value and a preset liquid supply temperature value is obtained;

[0027] The operating frequency of the compressor is adjusted according to the temperature difference value;

[0028] The temperature difference value includes the size of the temperature difference value and the change rate of the temperature difference value.

[0029] Further, the operating frequency of the compressor is adjusted according to the temperature difference value, comprising:

[0030] when the temperature difference value is greater than or equal to the preset temperature difference value, and the difference between the temperature difference value and the preset temperature difference value increases and / or the change rate of the temperature difference value decreases, the operating frequency of the compressor is increased;

[0031] when the temperature difference value is greater than or equal to the preset temperature difference value, and the difference between the temperature difference value and the preset temperature difference value decreases and / or the change rate of the temperature difference value increases, the operating frequency of the compressor is decreased;

[0032] when the temperature difference value is less than the preset temperature difference value, the compressor is turned off.

[0033] Further, the control method further comprises:

[0034] when T h1 ≤T h <T h2 , the environment temperature value T h is in a first environment temperature interval, and the first environment temperature interval corresponds to an operating frequency range of [F min , F max1 ];

[0035] when T h2 ≤T h <T h3 , the environment temperature value T h is in a second environment temperature interval, and the second environment temperature interval corresponds to an operating frequency range of [F min , F max2 ];

[0036] when T h3 ≤T h <T h4 , the environment temperature value T h is in a third environment temperature interval, and the third environment temperature interval corresponds to an operating frequency range of [F min , F max3 ];

[0037] when T h4 ≤T h <T h5 , the environment temperature value T h is in a fourth environment temperature interval, and the fourth environment temperature interval corresponds to an operating frequency range of [F min , F max4 ];

[0038] when T h5 ≤T h <T h6 , the environment temperature value T hIn the fifth environmental temperature interval, the corresponding operating frequency range of the fifth environmental temperature interval is [F min , F max5 ];

[0039] Wherein, F max1 <F max2 <F max3 <F max4 <F max5 ; T h1 is a first preset environmental temperature value, T h2 is a second preset environmental temperature value, T h3 is a third preset environmental temperature value, T h4 is a fourth preset environmental temperature value, T h5 is a fifth preset environmental temperature value, T h6 is a sixth preset environmental temperature value.

[0040] Further, the adjustment target value includes a target speed value of a fan of the liquid cooling unit; the corresponding adjustment target value is determined according to the environmental temperature interval, including:

[0041] Obtaining a pressure value at the outlet of a compressor of the liquid cooling unit;

[0042] Obtaining a current condensing temperature value T1 corresponding to the pressure value;

[0043] Determining a target condensing temperature value T0 corresponding to the environmental temperature interval;

[0044] Obtaining a condensing temperature difference ΔT between the current condensing temperature value T1 and the target condensing temperature value T0, ΔT=T1-T0;

[0045] Determining the target speed value according to the condensing temperature difference ΔT.

[0046] Further, the target speed value determined according to the condensing temperature difference ΔT is the adjustment target value, including:

[0047] Obtaining an actual speed value of the fan;

[0048] When ΔT≥T a1 , the target speed value is greater than the actual speed value;

[0049] When T b1 ≤ΔT<T a1 , the target speed value is equal to the actual speed value;

[0050] When ΔT<T b1 , the target speed value is less than the actual speed value.

[0051] Further, the target speed value greater than the actual speed value includes: when T a1 ≤ΔT<Ta2 when T a2 ≤ ΔT < T a3 , the target speed value is the sum of the actual speed value and the second preset speed-up value; when T a3 ≤ ΔT < T a4 , the target speed value is the sum of the actual speed value and the third preset speed-up value; when ΔT ≥ T a4 , the target speed value is the sum of the actual speed value and the fourth preset speed-up value; wherein the fourth preset speed-up value is greater than the third preset speed-up value, the third preset speed-up value is greater than the second preset speed-up value, and the second preset speed-up value is greater than the first preset speed-up value; and / or,

[0052] when T b2 ≤ ΔT < T b1 , the target speed value is the difference between the actual speed value and the first preset speed-down value; when ΔT < T b2 , the target speed value is the difference between the actual speed value and the second preset speed-down value; wherein the second preset speed-down value is greater than the first preset speed-down value; and / or,

[0053] when T b2 ≤ ΔT < T b1 , the target speed value is the difference between the actual speed value and the first preset speed-down value; when ΔT < T b2 , the target speed value is the difference between the actual speed value and the second preset speed-down value; wherein the second preset speed-down value is greater than the first preset speed-down value; and / or,

[0054] Further, the target value comprises a target speed value of a fan of the liquid cooling unit; the fan is at least two, and the control method further comprises:

[0055] obtaining the target speed value of each fan, comparing each target speed value to obtain a maximum speed target value among the at least two target speed values; and adjusting the speed of the at least two fans to the maximum speed target value; and / or,

[0056] after the speeds of the at least two fans are made consistent, simultaneously adjusting the speed of the at least two fans.

[0057] Further, the fan is at least two, and the control method further comprises:

[0058] obtaining a pressure value at the outlet of the compressor of the liquid cooling unit;

[0059] obtaining a current condensing temperature value corresponding to the pressure value;

[0060] adjusting the number of fans to be turned on according to the size of the current condensing temperature value.

[0061] Further, the liquid cooling unit further comprises a condenser; the fan comprises a middle fan arranged towards the middle part of the condenser and a side fan arranged at one side of the middle fan; the number of the opened fans is adjusted according to the current condensing temperature value, comprising:

[0062] when T1>T N , the middle fan and the side fan are both normally operated;

[0063] when T1≤T N , the middle fan is normally operated and the side fan is closed;

[0064] wherein, T N is a preset temperature value and T1 is a current condensing temperature value.

[0065] Further, in the process that the current condensing temperature value T1 changes from T1≤T N to T1>T N , the control method further comprises:

[0066] the side fan is rotated at a minimum rotating speed value and the rotating speed of the middle fan is adjusted to the minimum rotating speed value;

[0067] after the rotating speed of the side fan and the middle fan are both at the minimum rotating speed value, the middle fan and the side fan are simultaneously speed-adjusted.

[0068] According to another aspect of the present application, a liquid cooling unit system is provided, which is suitable for the liquid cooling unit control method provided above, and the liquid cooling unit system comprises:

[0069] a compressor and a fan;

[0070] a temperature detecting member for obtaining an environmental temperature value of the liquid cooling unit;

[0071] Further, the liquid cooling unit system further comprises a pressure detecting member arranged at the outlet of the compressor to obtain a pressure value at the outlet of the compressor; and / or,

[0072] the liquid cooling unit system further comprises a condenser; the fan is arranged at one side of the condenser and the air outlet end of the fan is arranged towards the condenser.

[0073] According to still another aspect of the present application, a liquid cooling unit control device is provided, which is used to execute the liquid cooling unit control method provided above, and the liquid cooling unit control device comprises:

[0074] an obtaining unit for obtaining an environmental temperature value of the liquid cooling unit;

[0075] a judging unit for determining a corresponding environmental temperature interval according to the environmental temperature value;

[0076] An adjusting unit is configured to determine a corresponding adjusting target value according to the environmental temperature interval and adjust the operation of the compressor and / or the fan of the liquid cooling unit according to the adjusting target value.

[0077] According to still another aspect of the present application, there is provided a nonvolatile storage medium comprising a stored program, wherein the program, when executed, controls a device in which the nonvolatile storage medium is located to perform the above-provided liquid cooling unit control method.

[0078] The technical solution of the present application can determine the environmental temperature interval corresponding to the environmental temperature value and the adjusting target value corresponding to the environmental temperature interval through detection of the environmental temperature of the working liquid cooling unit, so as to adjust the operation of the compressor and / or the fan of the liquid cooling unit according to the adjusting target value, thereby fully adjusting the compressor and / or the fan according to the actual working environmental temperature of the liquid cooling unit, avoiding performance waste, and effectively improving the operation energy efficiency of the liquid cooling unit. Therefore, the technical solution of the present application can solve the technical problem of low energy efficiency of the energy storage liquid cooling unit in the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0079] The accompanying drawings, which form a part of the present application, are used to provide further understanding of the present application, and the illustrative embodiments of the present application and their descriptions are used to explain the present application, and do not constitute improper limitations on the present application. In the drawings:

[0080] Figure 1 A step schematic diagram of the liquid cooling unit control method provided by the embodiment one of the present application is shown;

[0081] Figure 2 A structural schematic diagram of the liquid cooling unit system provided by the embodiment two of the present application is shown.

[0082] In the above drawings, the following reference signs are used:

[0083] 10, compressor;

[0084] 20, fan; 21, middle fan; 22, side fan;

[0085] 30, temperature detection member;

[0086] 40, heat exchanger;

[0087] 50, condenser;

[0088] 61, first connecting portion; 62, second connecting portion; 63, third connecting portion;

[0089] 70, pressure detection member;

[0090] 80, exhaust temperature detection member;

[0091] 90, an air suction temperature detecting member;

[0092] 100, a low-pressure switch;

[0093] 110, a filter;

[0094] 120, an electronic expansion valve;

[0095] 130, a liquid accumulator;

[0096] 140, a liquid inlet;

[0097] 150, a liquid outlet. DETAILED DESCRIPTION

[0098] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0099] As shown in Figure 1 Embodiment One of the present application provides a liquid cooling unit control method, which comprises: acquiring an ambient temperature value of the working of the liquid cooling unit; determining a corresponding ambient temperature interval according to the ambient temperature value; determining a corresponding adjustment target value according to the ambient temperature interval, and adjusting the running condition of the compressor and / or the fan of the liquid cooling unit according to the adjustment target value.

[0100] The liquid cooling unit control method provided by Embodiment One of the present application can determine the ambient temperature interval corresponding to the ambient temperature value and determine the adjustment target value corresponding to the ambient temperature interval by detecting the ambient temperature of the working of the liquid cooling unit, so as to adjust the running condition of the compressor 10 and / or the fan 20 of the liquid cooling unit according to the adjustment target value, thereby being able to adaptively adjust the compressor 10 and / or the fan 20 according to the actual working ambient temperature of the liquid cooling unit, so as to avoid the performance waste and effectively improve the operation energy efficiency of the liquid cooling unit. Therefore, the liquid cooling unit control method provided by the present embodiment can solve the technical problem of low energy efficiency of the energy storage liquid cooling unit in the prior art.

[0101] Specifically, the relationship between the ambient temperature range and the compressor frequency range ensures the efficient operation of the compressor 10 under different temperature conditions. At lower ambient temperatures, the compressor 10 is prevented from maintaining a high frequency when it is not necessary, thereby reducing unnecessary energy consumption and wear and tear. Conversely, at higher ambient temperatures, the refrigeration effect under high load demand can be ensured, while maintaining the overall energy efficiency of the system by operating at the optimal energy efficiency frequency point. The adjustment of the fan 20 speed is also responsive to changes in ambient temperature. As the ambient temperature increases, increasing the fan 20 speed can speed up air flow, thereby speeding up heat dissipation, reducing condensation temperature, and improving the efficiency of the refrigeration system. Conversely, when the ambient temperature is low, appropriately reducing the fan 20 speed not only reduces the energy consumption of the fan 20, but also maintains the high-low pressure difference of the system, ensuring the stability and energy efficiency of the refrigeration cycle. The combined control of the compressor 10 and the fan 20 enables the operating conditions of the two to be matched and optimized under different ambient temperatures, avoiding the problems of low system energy efficiency and excessive equipment wear and tear that may exist under a single control strategy. This control strategy can be automatically adjusted according to real-time environmental conditions, ensuring that the system can operate at the best energy efficiency state within a wide range of ambient temperatures, thereby significantly reducing energy consumption while meeting cooling demands, improving the economy and environmental protection of the entire energy storage liquid cooling unit. In addition, by avoiding the operation of the compressor 10 and the fan 20 at non-efficiency points, the service life of the equipment is also extended, further reducing maintenance costs and enhancing the reliability and stability of the system.

[0102] Specifically, the liquid cooling unit to which the embodiment is applied is a whole machine that is arranged in a cabinet and placed outdoors. Specifically, the ambient temperature value at which the liquid cooling unit operates is the ambient temperature value of the outdoor environment in which the liquid cooling unit is placed.

[0103] Specifically, the adjustment target value includes a target frequency value of the compressor 10 of the liquid cooling unit. The method of adjusting the operating condition of the compressor 10 of the liquid cooling unit according to the adjustment target value includes adjusting the operating frequency of the compressor 10 according to the target frequency value of the compressor 10. With such a method, this adjustment mechanism ensures that the compressor 10 operates at an appropriate frequency, avoiding energy efficiency decline and equipment protection problems caused by excessively high or low frequency. The compressor 10 operates at the target frequency value point, which can maximize refrigeration efficiency while reducing energy consumption, especially when the ambient temperature changes, it can quickly adapt to maintain a high energy efficiency ratio. Dynamic adjustment of the operating frequency of the compressor 10 can maintain the stable operation of the system according to the actual refrigeration demand and environmental conditions, avoiding mismatch between refrigeration capacity and heat load.

[0104] Specifically, the adjustment target value includes a target rotational speed value of the fan 20 of the liquid cooling unit. The method for adjusting the operation of the fan 20 of the liquid cooling unit according to the adjustment target value includes adjusting the rotational speed of the fan 20 according to the target rotational speed value of the fan 20. With such a method, by determining the target rotational speed value and adjusting the rotational speed accordingly, efficient management of the heat dissipation process of the liquid cooling unit is achieved. The automatic adjustment of the rotational speed of the fan 20 reduces unnecessary energy consumption and improves the overall energy efficiency of the system. The adjustment of the rotational speed of the fan 20 directly responds to changes in the ambient temperature, ensuring that the fan 20 can effectively dissipate heat under different ambient temperatures and heat loads, maintaining the condensing temperature within the target range and ensuring the efficiency of the refrigeration cycle. In addition, when high-intensity heat dissipation is not required, the target rotational speed value can also be adjusted to reduce the rotational speed of the fan, thereby reducing noise and improving the comfort of the operating environment.

[0105] Specifically, the adjustment target value includes a target rotational speed value of the fan 20 of the liquid cooling unit. The method for adjusting the operation of the fan 20 of the liquid cooling unit according to the adjustment target value includes adjusting the rotational speed of the fan 20 according to the target rotational speed value of the fan 20. With such a method, by determining the target rotational speed value and adjusting the rotational speed accordingly, efficient management of the heat dissipation process of the liquid cooling unit is achieved. The automatic adjustment of the rotational speed of the fan 20 reduces unnecessary energy consumption and improves the overall energy efficiency of the system. The adjustment of the rotational speed of the fan 20 directly responds to changes in the ambient temperature, ensuring that the fan 20 can effectively dissipate heat under different ambient temperatures and heat loads, maintaining the condensing temperature within the target range and ensuring the efficiency of the refrigeration cycle. In addition, when high-intensity heat dissipation is not required, the target rotational speed value can also be adjusted to reduce the rotational speed of the fan, thereby reducing noise and improving the comfort of the operating environment.

[0106] Specifically, the method for determining the current condensing temperature value according to the target frequency value of the compressor 10 includes: setting the operating frequency of the compressor 10 to the target frequency value; obtaining the pressure value at the outlet of the compressor 10; and obtaining the current condensing temperature value corresponding to the pressure value. With such a method, joint control of the compressor 10 and the fan 20 can be easily achieved, thereby improving the energy efficiency of the operation of the liquid cooling unit.

[0107] In the embodiment, the adjustment target value comprises a target frequency value of the compressor 10 of the liquid cooling unit. The method for determining the corresponding adjustment target value according to the environmental temperature interval comprises: determining a range of the operable frequency of the compressor 10 according to the environmental temperature interval; and determining the target frequency value within the range of the operable frequency of the compressor 10. By setting a reasonable range of the operable frequency of the compressor 10 corresponding to different environmental temperature intervals, the method can greatly reduce the situation of protection shutdown during the operation of the compressor 10, further prolong the service life of the compressor 10, and meanwhile, the refrigeration effect of the energy storage liquid cooling unit is taken into account. In addition, the determined range of the operable frequency of the compressor 10 takes into account the performance characteristics and safe operation requirements of the compressor 10 under different environmental temperatures, avoiding the protection shutdown or abnormal state that may be caused by the operation of the compressor 10 at an extreme frequency, and enhancing the stability and reliability of the system.

[0108] Specifically, after the main control board of the energy storage liquid cooling unit issues a start command, the compressor 10 operates at an initial frequency for a preset time length, and then determines the range of the operable frequency of the compressor 10 according to the environmental temperature, to preferentially ensure that the compressor 10 will not appear protection or abnormal state due to too high or too low operating frequency. Specifically, the preset time length is 2 minutes.

[0109] Specifically, the method for determining the target frequency value within the range of the operable frequency of the compressor 10 as the adjustment target value comprises: obtaining the energy efficiency ratio corresponding to each frequency value within the range of the operable frequency; comparing each energy efficiency ratio with a preset energy efficiency ratio to obtain an optimal frequency value with an energy efficiency ratio greater than the preset energy efficiency ratio; and determining the target frequency value according to the optimal frequency value. Since the energy efficiency of the compressor 10 is different at different operating frequencies, the frequency control method of the traditional variable frequency compressor 10 is to freely adjust the frequency of the compressor 10 according to the change of the load within the operable range. This method cannot make the compressor 10 operate at the frequency point with the highest energy efficiency for a long time. In the embodiment, by selecting the optimal frequency value from the range of the operable frequency of the compressor 10 under each environmental temperature interval, the load demand can be met while improving the operating energy efficiency of the unit on the basis of ensuring that the operating frequency of the compressor 10 is within the operable range.

[0110] Specifically, the method for determining the adjustment target value according to the optimal frequency value comprises: in the case where the optimal frequency value is one, determining the optimal frequency value as the target frequency value. In this way, comparison and selection are not required, and the convenience of adjusting the operating frequency of the compressor 10 can be improved.

[0111] Specifically, the method for determining the adjustment target value according to the preferred frequency value comprises: in the case of multiple preferred frequency values, obtaining an actual operating frequency value of the compressor; comparing the actual operating frequency value with each preferred frequency value that is greater than the actual operating frequency value to obtain a first preferred frequency value with the smallest difference from the actual operating frequency value; comparing the actual operating frequency value with each preferred frequency value that is less than the actual operating frequency value to obtain a second preferred frequency value with the smallest difference from the actual operating frequency value; in the case of needing to increase the operating frequency of the compressor, determining the first preferred frequency value as the target frequency value; in the case of needing to decrease the operating frequency of the compressor, determining the second preferred frequency value as the target frequency value. With such a method, the most suitable target frequency value can be selected from multiple preferred frequency values to reduce frequency adjustment consumption and improve operating energy efficiency. In the case of needing to adjust the operating frequency of the compressor 10, whether to increase or decrease the frequency, the method can quickly find the preferred frequency value closest to the current operating frequency, avoid system impact caused by sudden and large frequency adjustment, realize smooth transition of frequency adjustment, and enhance the stability and comfort of the system.

[0112] Specifically, the energy efficiency ratio is the ratio of the refrigeration capacity to the operating power. Specifically, the preferred frequency value in each operable frequency range is at least four. In this way, the number of selectable preferred frequency values can be ensured, thereby facilitating adjustment of the actual operating frequency to a preferred frequency value close thereto. Specifically, when the operating frequency of the compressor 10 is at a preferred frequency value, the operating energy efficiency improvement rate of the liquid-cooled chiller is greater than or equal to 5%.

[0113] In the present embodiment, the control method further comprises: obtaining an actual liquid supply temperature value of the liquid-cooled chiller, and obtaining a temperature difference value between the actual liquid supply temperature value and a preset liquid supply temperature value; adjusting the operating frequency of the compressor 10 according to the condition of the temperature difference value; wherein the condition of the temperature difference value includes the size of the temperature difference value and the change rate of the temperature difference value. Specifically, the temperature difference value is the absolute value of the difference between the actual liquid supply temperature value and the preset liquid supply temperature value. With such a method, the frequency of the compressor 10 can be determined to be increased or decreased according to the temperature difference between the set liquid supply temperature and the actual liquid supply temperature and the change rate of the temperature difference, thereby ensuring that the chiller can meet the required refrigeration capacity and ensuring the refrigeration effect of the liquid-cooled chiller. Specifically, the actual liquid supply temperature value of the chiller refers to the liquid temperature at the liquid outlet 150 of the liquid-cooled chiller.

[0114] Specifically, the method of adjusting the operating frequency of the compressor 10 according to the temperature difference value includes: when the temperature difference value is greater than or equal to a preset temperature difference value, and the difference between the temperature difference value and the preset temperature difference value increases and / or the change rate of the temperature difference value decreases, increasing the operating frequency of the compressor 10; when the temperature difference value is greater than or equal to the preset temperature difference value, and the difference between the temperature difference value and the preset temperature difference value decreases and / or the change rate of the temperature difference value increases, decreasing the operating frequency of the compressor 10; when the temperature difference value is less than the preset temperature difference value, turning off the compressor 10. By using such a method, the operating frequency of the compressor 10 can be accurately adjusted according to the size of the temperature difference value and the change rate of the temperature difference value, so as to reduce energy consumption while ensuring the refrigerating capacity, and further improve the energy efficiency of the liquid chiller unit.

[0115] Specifically, the preset temperature difference value can be 2℃.

[0116] In the embodiment, the control method further includes: when T h1 ≤T h <T h2 , the environment temperature value T h is in a first environment temperature interval, and the first environment temperature interval corresponds to an operating frequency range of [F min , F max1 ]; when T h2 ≤T h <T h3 , the environment temperature value T h is in a second environment temperature interval, and the second environment temperature interval corresponds to an operating frequency range of [F min , F max2 ]; when T h3 ≤T h <T h4 , the environment temperature value T h is in a third environment temperature interval, and the third environment temperature interval corresponds to an operating frequency range of [F min , F max3 ]; when T h4 ≤T h <T h5 , the environment temperature value T h is in a fourth environment temperature interval, and the fourth environment temperature interval corresponds to an operating frequency range of [F min , F max4 ]; when T h5 ≤T h <T h6 , the environment temperature value T h is in a fifth environment temperature interval, and the fifth environment temperature interval corresponds to an operating frequency range of [F min , F max5 ]; wherein F max1 <F max2<F max3 <F max4 <F max5 ;T h1 is a first preset ambient temperature value, T h2 is a second preset ambient temperature value, T h3 is a third preset ambient temperature value, T h4 is a fourth preset ambient temperature value, T h5 is a fifth preset ambient temperature value, T h6 is a sixth preset ambient temperature value. Specifically, the working environment temperature of the liquid cooling unit in the embodiment is usually-15℃ to 30℃ (including-15℃ and 30℃), and by setting five ambient temperature intervals, this method can better adapt to the refrigeration demand under different ambient temperatures by setting the running frequency range of the compressor 10, and thus the running frequency of the compressor 10 can be better adapted to the ambient temperature to improve the energy efficiency ratio of the liquid cooling unit.

[0117] Specifically, when-15℃≤T h <9℃, the ambient temperature value T h is in the first ambient temperature interval, and the first ambient temperature interval corresponds to a running frequency range of [F min , F max1 ]; when 9℃≤T h <30℃, the ambient temperature value T h is in the second ambient temperature interval, and the second ambient temperature interval corresponds to a running frequency range of [F min , F max2 ]; when 30℃≤T h <40℃, the ambient temperature value T h is in the third ambient temperature interval, and the third ambient temperature interval corresponds to a running frequency range of [F min , F max3 ]; when 40℃≤T h <49℃, the ambient temperature value T h is in the fourth ambient temperature interval, and the fourth ambient temperature interval corresponds to a running frequency range of [F min , F max4 ]; when 49℃≤T h <55℃, the ambient temperature value T h is in the fifth ambient temperature interval, and the fifth ambient temperature interval corresponds to a running frequency range of [F min , F max5 ]; wherein, F max1 <F max2 <F max3 <F max4 <F max5By using such a method, since the higher the ambient temperature, the greater the influence on the refrigeration effect of the liquid cooling unit, therefore, by setting such five ambient temperature intervals, the refrigeration effect of the liquid cooling unit can be better ensured.

[0118] In the embodiment, the adjustment target value comprises a target rotating speed value of the fan 20 of the liquid cooling unit. The method for determining the corresponding adjustment target value according to the ambient temperature interval comprises: obtaining a pressure value at the outlet of the compressor 10 of the liquid cooling unit; obtaining a current condensing temperature value T1 corresponding to the pressure value; determining a corresponding target condensing temperature value T0 according to the ambient temperature interval; obtaining a condensing temperature difference value ΔT between the current condensing temperature value T1 and the target condensing temperature value T0, ΔT=T1-T0; and determining the target rotating speed value according to the condensing temperature difference value ΔT. By using such a method, since the fan 20 in the conventional energy storage liquid cooling unit is usually set to have high, medium and low rotating speeds, the adjustment of the fan 20 is relatively simple and it is difficult to adapt to the change of the ambient temperature. Such a setting in the embodiment enables the fan 20 to adjust the rotating speed according to the change of the ambient temperature, thereby avoiding power waste and further improving the energy efficiency of the liquid cooling unit.

[0119] Specifically, the ambient temperature interval and the target condensing temperature value are both multiple, and the multiple ambient temperature intervals and the multiple target condensing temperature values correspond to each other one by one.

[0120] Specifically, the method for determining the target rotating speed value as the adjustment target value according to the condensing temperature difference value ΔT comprises: obtaining an actual rotating speed value of the fan 20; when ΔT≥T a1 , making the target rotating speed value greater than the actual rotating speed value; when T b1 ≤ΔT<T a1 , making the target rotating speed value equal to the actual rotating speed value; and when ΔT<T b1 , making the target rotating speed value less than the actual rotating speed value. By using such a method, the rotating speed of the fan 20 can be increased when ΔT≥T a1 , the current rotating speed of the fan 20 can be kept unchanged when T b1 ≤ΔT<T a1 , and the rotating speed of the fan 20 can be decreased when ΔT<T b1 . Such a setting directly adjusts the rotating speed of the fan 20 according to the condensing temperature, can quickly intervene in the operation state of the unit, and when the ambient temperature is relatively high, the current condensing temperature value of the unit is increased, the rotating speed of the fan 20 is increased, thereby the current condensing temperature value is decreased, and the decrease of the current condensing temperature value can improve the energy efficiency of the refrigeration system; when the ambient temperature is relatively low, the current condensing temperature value of the unit is decreased, the high-low pressure difference is small, and the rotating speed of the fan 20 is decreased to ensure that the high-low pressure difference meets the needs of the operation of the refrigeration system of the unit, and the decrease of the rotating speed of the fan 20 can further improve the energy efficiency.

[0121] Specifically, the method of making the target speed value greater than the actual speed value includes: when T a1 ≤ ΔT < T a2 , making the target speed value the sum of the actual speed value and a first preset speed-up value; when T a2 ≤ ΔT < T a3 , making the target speed value the sum of the actual speed value and a second preset speed-up value; when T a3 ≤ ΔT < T a4 , making the target speed value the sum of the actual speed value and a third preset speed-up value; when ΔT ≥ T a4 , making the target speed value the sum of the actual speed value and a fourth preset speed-up value; wherein the fourth preset speed-up value is greater than the third preset speed-up value, the third preset speed-up value is greater than the second preset speed-up value, and the second preset speed-up value is greater than the first preset speed-up value. With such a method, the speed of the fan 20 can be directly adjusted according to the condensing temperature, so that the running state of the unit is quickly intervened. In the case of high external ambient temperature, increasing the speed of the fan 20 can reduce the current condensing temperature value, thereby improving the energy efficiency of the unit refrigeration system. When the difference ΔT between the condensing temperature and the target temperature is in different ranges, the method intelligently adjusts the speed of the fan 20 according to the preset speed-up values T a1 , T a2 , T a3 and T a4 . This ensures that the adjustment of the speed of the fan 20 can accurately match the needs of the refrigeration system, quickly respond to changes in the condensing temperature, maintain the thermal balance of the system, and especially when the ambient temperature changes rapidly, the speed can be quickly adjusted to an appropriate speed to prevent the condensing temperature from deviating from the set value.

[0122] Specifically, the method of making the target speed value less than the actual speed value includes: when T b2 ≤ ΔT < T b1 , making the target speed value the difference between the actual speed value and a first preset speed-down value; when ΔT < T b2 , making the target speed value the difference between the actual speed value and a second preset speed-down value; wherein the second preset speed-down value is greater than the first preset speed-down value. With such a method, when the external ambient temperature is low, the current condensing temperature value of the unit decreases, resulting in a small high-low pressure difference. By reducing the speed of the fan 20, the high-low pressure difference can be ensured to meet the needs of the unit refrigeration system, and the reduction of the speed of the fan 20 can bring a reduction in power, thereby further improving the energy efficiency of the liquid cooling unit.

[0123] Specifically, to make the target speed value greater than the actual speed value, the method includes: making the speed of the fan not exceed the maximum speed value. To make the target speed value less than the actual speed value, the method includes: making the speed of the fan not be lower than the minimum speed value. Specifically, the minimum speed value of the fan 20 is confirmed by a jumper cap.

[0124] Specifically, when ΔT < -2℃, the target speed value is the difference between the actual speed value and the second preset speed reduction value; when -2℃≤ΔT < -1℃, the target speed value is the difference between the actual speed value and the first preset speed reduction value; when -1℃≤ΔT < 0℃, the target speed value is equal to the actual speed value; when 0℃≤ΔT < 1℃, the target speed value is the sum of the actual speed value and the first preset speed increase value; when 1℃≤ΔT < 3℃, the target speed value is the sum of the actual speed value and the second preset speed increase value; when 3℃≤ΔT < 5℃, the target speed value is the sum of the actual speed value and the third preset speed increase value; when ΔT≥5℃, the target speed value is the sum of the actual speed value and the fourth preset speed increase value. Specifically, the second preset speed reduction value is greater than 0 rpm and less than or equal to 100 rpm. The first preset speed reduction value is greater than 0 rpm and less than or equal to 50 rpm. The first preset speed increase value is greater than 0 rpm and less than or equal to 50 rpm. The second preset speed increase value is greater than 0 rpm and less than or equal to 100 rpm. The third preset speed increase value is greater than or equal to 50 rpm and less than or equal to 200 rpm. The fourth preset speed increase value is greater than or equal to 100 rpm and less than or equal to 300 rpm.

[0125] In the embodiment, the target value includes the target speed value of the fan 20 of the liquid cooling unit; the fan 20 is at least two, and the control method further includes: obtaining the target speed value of each fan 20, comparing each target speed value to obtain the maximum speed target value among the at least two target speed values; and making the speed of the at least two fans 20 all adjust to the maximum speed target value. By using such a method, when there are at least two fans 20, the speed of the at least two fans 20 can be synchronously increased or decreased according to the maximum speed target value, so as to ensure that the fan 20 effectively intervenes in the current condensation temperature value, thereby further improving the energy efficiency of the liquid cooling unit. The uniform adjustment of the speed of the fan 20 reduces the system instability that may be caused by the speed difference between different fans 20, such as uneven airflow, local overheating and the like. All the fans 20 operate at the same maximum speed target value, which can ensure the uniformity and consistency of the surrounding air flow, maintain the thermal balance of the system, and enhance the stability and reliability of the system.

[0126] Specifically, the adjustment target value includes a target rotating speed value of the fan 20 of the liquid cooling unit; the fan 20 is at least two, and the control method further includes: synchronizing the rotating speeds of the at least two fans 20, and then simultaneously adjusting the rotating speeds of the at least two fans 20. By using such a method, the rotating speeds of the at least two fans 20 can be synchronously increased or decreased when there are at least two fans 20, and airflow non-uniformity caused by the rotating speed difference of different fans 20 can be avoided, so that the effective intervention of the fan 20 on the current condensation temperature value can be ensured, and the energy efficiency of the liquid cooling unit can be further improved. Moreover, unified speed adjustment can avoid system vibration or noise problems caused by the adjustment of the rotating speed of a single fan 20, ensure the stability and low noise of system operation, and improve the comfort of the working environment. By regarding multiple fans 20 as a unified control unit, the complexity of the control system is simplified, the performance requirement of the control system is reduced, the adjustment of the rotating speed of the fan 20 is easier to implement, the control error is reduced, and the controllability and reliability of the system are improved.

[0127] Specifically, the fan 20 is at least two, and the control method further includes: acquiring a pressure value at the outlet of the compressor 10 of the liquid cooling unit; acquiring a current condensation temperature value corresponding to the pressure value; and adjusting the number of fans 20 to be turned on according to the size of the current condensation temperature value. By using such a method, the number of fans 20 to be turned on can be adjusted according to the current condensation temperature value, so that the adaptability between the number of fans 20 to be turned on and the ambient temperature can be improved, and the energy efficiency of the liquid cooling unit can be further improved.

[0128] In the embodiment, the liquid cooling unit further includes a condenser 50. The fan 20 includes a middle fan 21 arranged towards the middle part of the condenser 50 and a side fan 22 located at one side of the middle fan 21. The method of adjusting the number of fans 20 to be turned on according to the size of the current condensation temperature value includes: when T1>T N , the middle fan and the side fan are both normally operated; and when T1≤T N , the middle fan is normally operated and the side fan is turned off; wherein T N is a preset temperature value, and T1 is a current condensation temperature value. By using such a method, only the middle fan 21 can be turned on when the current condensation temperature value is less than or equal to the preset temperature value, so that the cooling effect can be ensured and the energy consumption can be saved. When the current condensation temperature value is greater than the preset temperature value, the middle fan 21 and the side fan 22 are both turned on, so that the current condensation temperature value can be effectively reduced.

[0129] Specifically, T N = 20℃.

[0130] Specifically, when the current condensation temperature value T1 changes from T1≤T N to T1>T NIn the case that the condensing temperature value is lower than the first threshold value, the control method further comprises: rotating the side fan 22 at the lowest speed value and adjusting the rotating speed of the middle fan 21 to the lowest speed value; after the rotating speed of the side fan 22 and the middle fan 21 are both at the lowest speed value, simultaneously adjusting the rotating speed of the middle fan 21 and the side fan 22. By using such a method, the rotating speed of the middle fan 21 and the side fan 22 can be synchronously increased or decreased, so that the effective intervention of the fan 20 on the current condensing temperature value can be ensured, and the energy efficiency of the liquid cooling unit is further improved. The cooperative speed adjustment of the side fan 22 and the middle fan 21 ensures the uniformity of the airflow distribution in the whole system, enhances the heat dissipation effect, and improves the overall heat exchange efficiency of the system. Such a cooperative working mode is particularly important when the condensing temperature changes, and can quickly restore the thermal balance state of the system.

[0131] As shown in Figure 2 Embodiment two of the present application provides a liquid cooling unit system, which is suitable for the liquid cooling unit control method provided in embodiment one, and comprises a compressor 10, a fan 20 and a temperature detection member 30, wherein the temperature detection member 30 is used to obtain the ambient temperature value of the working environment of the liquid cooling unit.

[0132] By using the liquid cooling unit system provided in embodiment two of the present application, the temperature detection member 30 can detect the ambient temperature of the working environment of the liquid cooling unit, determine the ambient temperature interval corresponding to the ambient temperature value, and determine the adjustment target value corresponding to the ambient temperature interval, so that the running state of the compressor 10 and / or the fan 20 of the liquid cooling unit can be adjusted according to the adjustment target value, the compressor 10 and / or the fan 20 can be adaptively adjusted according to the actual working ambient temperature of the liquid cooling unit, and the performance waste can be avoided, thereby effectively improving the running energy efficiency of the liquid cooling unit. The system dynamically adjusts the running parameters of the compressor 10 and the fan 20 according to the ambient temperature value, which can avoid the energy efficiency reduction problem caused by the traditional fixed control strategy when the ambient temperature changes. At a lower ambient temperature, the system can reduce the compressor frequency and the fan rotating speed to reduce energy consumption; at a higher ambient temperature, the system can increase the compressor frequency and the fan rotating speed to ensure efficient cooling effect, thereby improving the overall system energy efficiency. Therefore, by using the liquid cooling unit system provided in the embodiment, the technical problem of low energy efficiency of the energy storage liquid cooling unit in the prior art can be solved.

[0133] Specifically, the liquid cooling unit system further comprises a pressure detection member 70 arranged at the outlet of the compressor 10 to obtain the pressure value at the outlet of the compressor 10. In this way, the pressure at the outlet of the compressor 10 can be detected by the pressure detection member 70. Specifically, the pressure detection member 70 is a high-pressure pressure sensor.

[0134] ​Specifically, the liquid cooling unit system further comprises a condenser 50. The fan 20 is arranged at one side of the condenser 50, and the air outlet end of the fan 20 is arranged towards the condenser 50. With such an arrangement, the condenser 50 can be cooled by the fan 20. Directly aiming the air outlet end of the fan 20 at the condenser 50 can ensure that the air flow generated by the fan directly acts on the heat dissipation surface of the condenser 50, improving the heat exchange efficiency between the air and the condenser 50, thereby more effectively reducing the condensing temperature and improving the overall refrigeration effect of the liquid cooling unit. Specifically, the condenser 50 can be a micro-channel condenser. Specifically, the fan 20 includes a middle fan 21 and side fans 22, and the middle fan 21 is arranged at a position corresponding to the middle of the condenser 50. The side fans 22 are arranged at the sides of the middle fan 21. Specifically, the side fans 22 are two, and the two side fans 22 are respectively located at the two sides of the middle fan 21.

[0135] Specifically, the liquid cooling unit system further comprises a heat exchanger 40. The heat exchanger 40 is connected to the compressor 10 through a first connecting portion 61, the compressor 10 is connected to the condenser 50 through a second connecting portion 62, and the condenser 50 is connected to the heat exchanger 40 through a third connecting portion 63. Specifically, the heat exchanger 40 can be a plate heat exchanger. Specifically, the temperature detection member 30 is arranged on the third connecting portion 63 and located at the side of the third connecting portion 63 close to the condenser 50. Specifically, the liquid cooling unit system further comprises an exhaust temperature detection member 80 and a suction temperature detection member 90, the exhaust temperature detection member 80 is arranged on the second connecting portion 62 to detect the exhaust temperature of the compressor 10, and the suction temperature detection member 90 is arranged on the first connecting portion 61 to detect the suction temperature of the compressor 10. Specifically, the liquid cooling unit system further comprises a filter 110, a low-pressure switch 100, and an electronic expansion valve 120. The filter 110 is arranged on the third connecting portion 63 to filter out impurities and particulate matter in the liquid cooling unit system. The low-pressure switch 100 is arranged on the first connecting portion 61 to prevent the compressor 10 from being damaged at too low a pressure. The electronic expansion valve 120 is arranged on the third connecting portion 63 to adjust the liquid output of the liquid cooling unit system. Specifically, the liquid cooling unit system further comprises a liquid reservoir 130, a liquid inlet 140, and a liquid outlet 150. The liquid reservoir 130 is arranged on the third connecting portion 63 to store the cooling liquid. The liquid inlet 140 and the liquid outlet 150 are both connected to the heat exchanger 40 to allow the cooling liquid to enter or flow out of the heat exchanger 40.

[0136] Embodiment three of the present application provides a liquid cooling unit control device, the liquid cooling unit control device is used for executing the liquid cooling unit control method provided by embodiment one, the liquid cooling unit control device comprises an acquisition unit, a judgment unit and an adjustment unit, the acquisition unit is used for acquiring the ambient temperature value of the working liquid cooling unit, the judgment unit is used for determining the corresponding ambient temperature interval according to the ambient temperature value, and the adjustment unit is used for determining the corresponding adjustment target value according to the ambient temperature interval and adjusting the running condition of the compressor and / or fan of the liquid cooling unit according to the adjustment target value.

[0137] Embodiment four of the present application provides a nonvolatile storage medium, the nonvolatile storage medium comprises a stored program, wherein, when the program is running, the device where the nonvolatile storage medium is located executes the liquid cooling unit control method provided by embodiment one.

[0138] From the above description, it can be seen that the above-mentioned embodiments of the present application achieve the following technical effects: through the joint control of the compressor, the fan and other loads, the energy efficiency ratio of the energy storage liquid cooling unit is effectively improved.

[0139] It should be noted that the terms used herein are only intended to describe specific embodiments and are not intended to limit exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form, unless the context clearly indicates otherwise, and it should also be understood that when the terms "comprise" and / or "include" are used in the specification, there is a reference to the presence of a feature, step, operation, device, component and / or combinations thereof.

[0140] Unless specifically stated otherwise, the relative arrangement of the components and steps illustrated in these embodiments and the numerical expressions and values set forth herein are not limiting of the scope of the present application. It should be understood that the various parts of the drawings are not necessarily drawn to scale, and that, for the purpose of convenience and clarity, not all components can be shown in a given figure. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art can not be discussed in detail, but can be assumed to be part of a skilled artisan's knowledge. In all examples shown and discussed herein, any specific value should be interpreted as merely an example and not as a limitation of the application. Thus, other examples of the exemplary embodiments can have different values. It should be noted that like reference numerals and letters refer to like items in the following drawings, and thus, once an item is defined in one drawing, it need not be discussed further in subsequent drawings.

[0141] In the description of the application, it should be understood that the orientation words such as "front, back, up, down, left, right", "transverse, vertical, perpendicular, horizontal" and "top, bottom" and the like indicated orientation or position relationship are generally based on the orientation or position relationship shown in the drawings, only for the convenience of describing the application and simplifying the description, without making the opposite statement, these orientation words do not indicate and imply that the device or element referred to must have a particular orientation or be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the scope of protection of the application; The orientation words "inner, outer" refer to the inner and outer of the contour of each component itself.

[0142] For the convenience of description, spatial relative terms such as "over", "above", "upper surface", "upper" and the like can be used herein to describe the spatial position relationship of one device or feature with other devices or features as shown in the drawings. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the device described in the drawings. For example, if the device in the drawing is inverted, the device described as "above" or "over" other devices or structures will be positioned "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below" orientations. The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein are interpreted accordingly.

[0143] In addition, it should be noted that the use of "first", "second" and the like words to define parts, only for the convenience of corresponding parts, such as no further declaration, the above words have no special meaning, therefore, it cannot be understood as a limitation on the scope of protection of the application.

[0144] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A liquid chiller unit control method, characterized by, The control method comprises the following steps: acquiring an ambient temperature value of a liquid cooling unit; determining a corresponding ambient temperature interval according to the ambient temperature value; determining a corresponding adjustment target value according to the ambient temperature interval, and adjusting the operation of a compressor and / or a fan of the liquid cooling unit according to the adjustment target value; the adjustment target value comprises a target frequency value of the compressor of the liquid cooling unit; the step of determining the corresponding adjustment target value according to the ambient temperature interval comprises: determining a range of available operating frequencies of the compressor according to the ambient temperature interval; and determining the target frequency value within the range of available operating frequencies of the compressor; the control method further comprises the following steps: When T h1 ≤ T h < T h2 , the environmental temperature value T h is in a first environmental temperature interval, and the corresponding operable frequency range is [F min , F max1 ]. When T h2 ≤ T h < T h3 , the environmental temperature value T h is in a second environmental temperature interval, and the corresponding operable frequency range is [F min , F max2 ]. When T h3 ≤ T h < T h4 , the environmental temperature value T h is in a third environmental temperature interval, and the corresponding operable frequency range is [F min , F max3 ]. When T h4 ≤ T h < T h5 , the environmental temperature value T h is in a fourth environmental temperature interval, and a corresponding running frequency range of the fourth environmental temperature interval is [F min , F max4 ]. When T h5 ≤ T h < T h6 , the environmental temperature value T h is in a fifth environmental temperature interval, and the corresponding operable frequency range of the fifth environmental temperature interval is [F min , F max5 ]. wherein F max1 <F max2 <F max3 <F max4 <F max5 ; T h1 is a first preset ambient temperature value, T h2 is a second preset ambient temperature value, T h3 is a third preset ambient temperature value, T h4 is a fourth preset ambient temperature value, T h5 is a fifth preset ambient temperature value, T h6 is a sixth preset ambient temperature value.

2. The control method according to claim 1, characterized by the adjustment target value comprises a target frequency value of the compressor of the liquid cooling unit and / or a target rotating speed value of the fan of the liquid cooling unit; the step of adjusting the operation of the compressor and / or the fan of the liquid cooling unit according to the adjustment target value comprises: adjusting the operating frequency of the compressor according to the target frequency value of the compressor; and / or, adjusting the rotating speed of the fan according to the target rotating speed value of the fan; and / or, determining a current condensing temperature value according to the target frequency value of the compressor, and adjusting the rotating speed of the fan according to the current condensing temperature value. the step of determining the target frequency value within the range of available operating frequencies of the compressor as the adjustment target value comprises:

3. The control method according to claim 1, characterized by, acquiring energy efficiency ratios corresponding to each frequency value within the range of available operating frequencies; comparing each energy efficiency ratio with a preset energy efficiency ratio to obtain a preferred frequency value with a larger energy efficiency ratio than the preset energy efficiency ratio; determining the target frequency value according to the preferred frequency value. the step of determining the adjustment target value according to the preferred frequency value comprises:

4. The control method according to claim 3, characterized by, in a case where the preferred frequency value is one, determining the preferred frequency value as the target frequency value; and / or, in a case where the preferred frequency value is multiple, acquiring an actual operating frequency value of the compressor; comparing the actual operating frequency value with the preferred frequency value larger than the actual operating frequency value among the multiple preferred frequency values to obtain a first preferred frequency value with a minimum difference from the actual operating frequency value; and comparing the actual operating frequency value with the preferred frequency value smaller than the actual operating frequency value among the multiple preferred frequency values to obtain a second preferred frequency value with a minimum difference from the actual operating frequency value; in a case where the operating frequency of the compressor needs to be increased, determining the first preferred frequency value as the target frequency value; and in a case where the operating frequency of the compressor needs to be decreased, determining the second preferred frequency value as the target frequency value. the control method further comprises the following steps:

5. The control method according to claim 1, characterized by, acquiring an actual liquid supply temperature value of the liquid cooling unit, and acquiring a temperature difference value between the actual liquid supply temperature value and a preset liquid supply temperature value; adjusting the operating frequency of the compressor according to the temperature difference value; wherein, the temperature difference value includes the size of the temperature difference value and the change rate of the temperature difference value. the step of adjusting the operating frequency of the compressor according to the temperature difference value comprises:

6. The control method according to claim 5, characterized by ​ when the temperature difference value is greater than or equal to the preset temperature difference value, and the difference between the temperature difference value and the preset temperature difference value increases and / or the change rate of the temperature difference value decreases, increasing the operating frequency of the compressor; when the temperature difference value is greater than or equal to the preset temperature difference value, and the difference between the temperature difference value and the preset temperature difference value decreases and / or the change rate of the temperature difference value increases, decreasing the operating frequency of the compressor; when the temperature difference value is less than the preset temperature difference value, turning off the compressor.

7. The control method according to claim 1, characterized by, The adjustment target value includes a target rotating speed value of a fan of the liquid cooling unit; and the determining of the corresponding adjustment target value according to the environmental temperature interval includes: obtaining a pressure value at an outlet of a compressor of the liquid cooling unit; obtaining a current condensing temperature value T1 corresponding to the pressure value; determining a target condensing temperature value T0 according to the environmental temperature interval; obtaining a condensing temperature difference value ΔT between the current condensing temperature value T1 and the target condensing temperature value T0, ΔT = T1 - T0; determining the target rotating speed value according to the condensing temperature difference value ΔT.

8. The control method according to claim 7, characterized by The determining of the target rotating speed value as the adjustment target value according to the condensing temperature difference value ΔT includes: obtaining an actual rotating speed value of the fan; when ΔT ≥ T a1 the target rotational speed value is made greater than the actual rotational speed value; When T b1 ≤ ΔT < T a1 the target speed value is equal to the actual speed value. When ΔT < T b1 the target rotational speed value is made smaller than the actual rotational speed value.

9. The control method according to claim 8, characterized by, The target speed value is greater than the actual speed value, comprising: when T a1 ≤ΔT<T a2 , the target speed value is the sum of the actual speed value and a first preset speed-up value; when T a2 ≤ΔT<T a3 , the target speed value is the sum of the actual speed value and a second preset speed-up value; when T a3 ≤ΔT<T a4 , the target speed value is the sum of the actual speed value and a third preset speed-up value; when ΔT≥T a4 , the target speed value is the sum of the actual speed value and a fourth preset speed-up value; wherein, the fourth preset speed-up value is greater than the third preset speed-up value, the third preset speed-up value is greater than the second preset speed-up value, the second preset speed-up value is greater than the first preset speed-up value; and / or, The method comprises: when T b2 ≤ ΔT < T b1 , setting the target rotating speed value as the difference between the actual rotating speed value and a first preset reducing speed value; when ΔT < T b2 , setting the target rotating speed value as the difference between the actual rotating speed value and a second preset reducing speed value; wherein the second preset reducing speed value is greater than the first preset reducing speed value; and / or, The making of the target rotating speed value greater than the actual rotating speed value includes making the rotating speed of the fan not exceed a maximum rotating speed value; and the making of the target rotating speed value less than the actual rotating speed value includes making the rotating speed of the fan not be less than a minimum rotating speed value.

10. The control method according to claim 1, characterized by The adjustment target value includes a target rotating speed value of a fan of the liquid cooling unit; The fan is at least two, and the control method further includes: obtaining a target rotating speed value of each fan, comparing each target rotating speed value to obtain a maximum rotating speed target value among the at least two target rotating speed values, and adjusting the rotating speed of the at least two fans to the maximum rotating speed target value; and / or after the rotating speeds of the at least two fans are consistent, simultaneously adjusting the rotating speeds of the at least two fans.

11. The control method according to claim 1, characterized by, The fan is at least two, and the control method further includes: obtaining a pressure value at an outlet of a compressor of the liquid cooling unit; obtaining a current condensing temperature value corresponding to the pressure value; adjusting the number of the fans to be turned on according to the size of the current condensing temperature value.

12. The control method according to claim 11, characterized by The liquid cooling unit further includes a condenser; and the fan includes a middle fan arranged towards a middle part of the condenser and a side fan arranged at one side of the middle fan. The adjusting of the number of the fans to be turned on according to the size of the current condensing temperature value includes: When T1 > T N both the middle and side blowers are caused to operate normally; When T1≤T N normal operation of the middle fan and the side fan is closed. wherein T N is a preset temperature value, and T1 is the current condensing temperature value.

13. The control method according to claim 12, characterized by, in the case where the current condensation temperature value T1 changes from T1≤T N to T1>T N , the control method further comprises: making the side fan rotate at a minimum rotating speed value and adjusting the rotating speed of the middle fan to the minimum rotating speed value; and after the rotating speeds of the side fan and the middle fan are both at the minimum rotating speed value, simultaneously adjusting the rotating speeds of the middle fan and the side fan.

14. A liquid chiller unit system, comprising: The liquid cooling unit system is suitable for the liquid cooling unit control method in any one of claims 1 to 13, and includes: a compressor (10) and a fan (20); a temperature detection member (30) for obtaining an environmental temperature value at which the liquid cooling unit works.

15. The liquid cooling unit system according to claim 14, characterized in that, the liquid cooling unit system further comprises a pressure detection member (70) arranged at the outlet of the compressor (10) to obtain a pressure value at the outlet of the compressor (10); and / or, the liquid cooling unit system further comprises a condenser (50); the fan (20) is arranged at one side of the condenser (50), and the air outlet end of the fan (20) is arranged towards the condenser (50).

16. A liquid chiller unit control apparatus, comprising: A liquid cooling unit control device for executing the liquid cooling unit control method according to any one of claims 1 to 13, comprising: an obtaining unit configured to obtain an ambient temperature value of a liquid cooling unit; a determining unit configured to determine a corresponding ambient temperature interval according to the ambient temperature value; an adjusting unit configured to determine a corresponding adjusting target value according to the ambient temperature interval and adjust the operation of the compressor and / or the fan of the liquid cooling unit according to the adjusting target value.

17. A non-volatile storage medium, comprising: The non-volatile storage medium comprises a stored program, wherein when the program is running, the device where the non-volatile storage medium is located executes the liquid cooling unit control method according to any one of claims 1 to 13.

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