Water chiller, control method and device thereof, air conditioner and readable storage medium

Abstract

The application provides a water chiller, a control method and device thereof, an air conditioner and a readable storage medium. The control method of the water chiller comprises the following steps: controlling suction pressure and exhaust pressure of the water chiller; determining a system pressure difference of the water chiller according to the suction pressure and the exhaust pressure; and adjusting an operation state of the water chiller according to a comparison result of the system pressure difference and a preset pressure difference threshold. In this way, the operation high pressure and the operation low pressure of the water chiller are detected to determine the system pressure difference of the water chiller, and then the operation state of the water chiller is adjusted according to the comparison result of the system pressure difference and the preset pressure difference threshold, so that the water chiller can adapt to different working conditions, the water chiller can also operate safely in extreme environments, and the adaptability, safety, reliability and intelligence of the water chiller are improved, thereby improving the product competitiveness of the water chiller.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of chiller control, in particular to a chiller, a chiller control method and device, an air conditioner and a readable storage medium. BACKGROUND

[0002] The operation range of the chiller is related to factors such as high and low pressure, pressure difference and pressure ratio. However, the current chiller product performance is not perfect, and the working control of the chiller is not automated and intelligent enough. In the extreme working condition environment of high and low temperature, the safe operation of the chiller can only be realized through relevant operation, that is, the adaptability of the chiller is low, so as to meet the working demand in various working condition environments. SUMMARY

[0003] The present application aims at least to solve one of the problems in the prior art or related art.

[0004] To this end, a first aspect of the present application provides a chiller control method.

[0005] A second aspect of the present application provides a chiller control device.

[0006] A third aspect of the present application provides a chiller.

[0007] A fourth aspect of the present application provides a chiller.

[0008] A fifth aspect of the present application provides an air conditioner.

[0009] A sixth aspect of the present application provides a readable storage medium.

[0010] Therefore, according to one aspect of the present application, a chiller control method is provided, which comprises: detecting the suction pressure and discharge pressure of the chiller; determining the system pressure difference of the chiller according to the suction pressure and discharge pressure; and adjusting the operation state of the chiller according to the comparison result of the system pressure difference and the preset pressure difference threshold.

[0011] The execution subject of the technical solution of the chiller control method provided by the present application can be a chiller control device, and can also be determined according to actual use requirements, which is not specifically limited here. In order to more clearly describe the chiller control method provided by the present application, the execution subject of the chiller control method is taken as the chiller control device in the following description.

[0012] The water chiller control method provided by the application obtains the operation high pressure and the operation low pressure of the water chiller through a plurality of pressure sensors arranged on the water chiller. Then, the pressure difference between the operation high pressure and the operation low pressure is calculated to obtain a high-low pressure difference, that is, a system pressure difference of the water chiller. On this basis, the running state of the water chiller is adjusted according to the comparison result of the preset pressure difference threshold and the high-low pressure difference, so that the water chiller can adapt to the current high-low pressure difference and run safely under the current high-low pressure difference. In this way, the running state of the water chiller is automatically controlled according to the operation high pressure and the operation low pressure, which ensures the accuracy, reliability and intelligence of the water chiller control, thereby improving the reliability, safety and accuracy of the water chiller operation and the overall performance of the water chiller, and improving the product competitiveness of the water chiller.

[0013] It can be understood that the operation range of the water chiller is affected by the high and low pressures, the system pressure difference and the system pressure ratio in the working environment. The control method adjusts the running state of the water chiller according to the actual value of the high-low pressure difference of the water chiller, which ensures that the running state of the water chiller matches the above pressure parameters in the working environment, thereby ensuring that the water chiller can work normally under the current pressure parameters. That is, the working parameters of the water chiller are adjusted in real time according to the pressure parameters in the working environment, so that the water chiller can run within a safe range under the pressure parameters of various working conditions. In this way, the operation range of the water chiller is improved, that is, the working adaptability of the water chiller is improved, so that the water chiller can work normally under different working conditions, ensuring the reliability of the water chiller operation, expanding the use range of the water chiller, and thereby improving the overall performance of the water chiller.

[0014] Further, when the operation high pressure and the operation low pressure of the water chiller are obtained through a plurality of pressure sensors arranged on the water chiller, the operation low pressure of the water chiller can be obtained through an air suction pressure sensor arranged at the air suction port of the water chiller, and the operation high pressure of the water chiller can be obtained through an air exhaust pressure sensor arranged at the air exhaust port of the water chiller. Then, the working of the water chiller is adjusted and controlled according to the obtained air exhaust pressure (i.e. operation high pressure) and air suction pressure (i.e. operation low pressure) of the water chiller, so as to enhance the working adaptability of the water chiller.

[0015] It should be noted that in the actual application process, the running high pressure and the running low pressure of the water chiller can also be obtained through the pressure sensors arranged at other positions of the high and low pressure systems of the water chiller. The specific collection positions of the running high pressure and the running low pressure of the water chiller can be selected by the user according to the actual situation, and are not specifically limited here.

[0016] In addition, the specific value or range of the preset pressure difference threshold is related to factors such as the product type of the water chiller, the working refrigerant, and the working condition requirement. In the actual application process, the user can set the specific value or range of the preset pressure difference threshold according to the product type of the water chiller, the working refrigerant, and the working condition requirement, and the specific limitation is not made here.

[0017] Therefore, in the water chiller control method provided in the present application, the system pressure difference of the water chiller is calculated by collecting the running high pressure and the running low pressure of the water chiller, and then the running parameters of the water chiller are adjusted according to the actual value of the obtained system pressure difference. In this way, the accuracy, reliability and intelligence of the water chiller working control are ensured, the operating range of the water chiller is improved, that is, the working adaptability of the water chiller is improved, the use range of the water chiller is expanded, and the water chiller can adapt to different working condition environments to work normally, thereby improving the reliability, safety and accuracy of the water chiller working, improving the overall performance of the water chiller, and further improving the product competitiveness of the water chiller.

[0018] The water chiller control method according to the present application can have the following additional technical features:

[0019] In the above technical solution, the water chiller is provided with a plurality of fans, and the running state of the water chiller is adjusted according to the comparison result of the system pressure difference and the preset pressure difference threshold, specifically including: adjusting the running state of the plurality of fans according to the comparison result of the system pressure difference and the preset pressure difference threshold; wherein the running state includes a start state and a stop state.

[0020] In this technical solution, a plurality of fans are arranged in the water chiller, and on this basis, the specific way of adjusting the running parameters of the water chiller through the actual value of the system pressure difference is limited. Specifically, after the system pressure difference of the water chiller is calculated according to the running high pressure and the running low pressure, the system pressure difference is compared with the preset pressure difference threshold, and then the running state of the plurality of fans in the water chiller is adjusted according to the comparison result. The running state of the plurality of fans includes two states of start state and stop state, that is, the start and stop of the plurality of fans in the water chiller are controlled according to the comparison result between the obtained system pressure difference and the preset pressure difference threshold.

[0021] In the multiple groups of fans, the preset pressure difference threshold values of different groups of fans are different, that is, the trigger points of the operation state adjustment of the multiple groups of fans are different. In this way, by setting different trigger points for different groups of fans, when the operation parameters of the chiller unit are adjusted according to the pressure parameters of the chiller unit, different groups of fans are triggered to change the operation state according to the actual system pressure difference of the chiller unit, that is, different numbers of fans are started or stopped, so that the operation state of the chiller unit is changed to adapt to multiple pressure parameter conditions. In this way, the operation range of the chiller unit is improved, that is, the working adaptability of the chiller unit is improved, so that the chiller unit can work normally under different working conditions, ensures the reliability of the chiller unit, expands the use range of the chiller unit, and further improves the overall performance of the chiller unit.

[0022] In any of the above technical solutions, the preset pressure difference threshold value includes a first pressure difference threshold value, and the operation state of the multiple groups of fans is adjusted according to the comparison result of the system pressure difference and the preset pressure difference threshold value, specifically including: comparing the system pressure difference with the first pressure difference threshold value of each group of fans in the multiple groups of fans; based on the system pressure difference being greater than or equal to the first pressure difference threshold value, the corresponding fan group is controlled to start.

[0023] In this technical solution, the above-mentioned preset pressure difference threshold value includes a first pressure difference threshold value, which is the starting pressure difference threshold value of the fan group, that is, the first pressure difference threshold value is the trigger point of the fan group entering the starting state. On this basis, the technical solution limits the specific way of adjusting and controlling the operation parameters of the multiple groups of fans in the chiller unit according to the pressure parameters of the chiller unit. Specifically, after the system pressure difference of the chiller unit is calculated according to the operation high pressure and the operation low pressure of the chiller unit, the system pressure difference is compared with the starting pressure difference threshold value (that is, the first pressure difference threshold value) of each group of fans in the multiple groups of fans. Once the starting pressure difference threshold value of a group of fans is less than or equal to the value of the system pressure difference, the fan group is controlled to start working.

[0024] In the above multiple groups of fans, the specific values of the start-up pressure difference threshold of different groups of fans are different, that is, the start-up trigger points of different groups of fans are different. In this way, by setting different start-up trigger points for different groups of fans, when the operating parameters of the chiller unit are adjusted according to the pressure parameters of the chiller unit, different groups of fans are triggered to start according to the actual system pressure difference of the chiller unit. According to the difference in the number of started fan groups, the operating state of the chiller unit changes to different degrees, so that it can adapt to various pressure parameter conditions. In this way, the operating range of the chiller unit is improved, that is, the working adaptability of the chiller unit is improved, so that the chiller unit can work normally under different working conditions, ensuring the reliability of the chiller unit, expanding the use range of the chiller unit, and thus improving the overall performance of the chiller unit.

[0025] In addition, the specific value or range of the first pressure difference threshold is related to factors such as product type, working refrigerant, and working condition demand of the chiller unit. In actual application, the user can set the specific value or range of the first pressure difference threshold according to the product type, working refrigerant, and working condition demand of the chiller unit, which is not limited here.

[0026] In any of the above technical solutions, the preset pressure difference threshold further includes a second pressure difference threshold, and the operating state of the multiple groups of fans is adjusted according to the comparison result of the system pressure difference and the preset pressure difference threshold, and specifically further includes: comparing the system pressure difference with the second pressure difference threshold of each group of fans in the multiple groups of fans; based on the system pressure difference being less than or equal to the second pressure difference threshold, controlling the corresponding fan group to be closed; wherein the second pressure difference threshold of each group of fans is less than the first pressure difference threshold.

[0027] In this technical solution, the preset pressure difference threshold can further include a second pressure difference threshold, which is the closing pressure difference threshold of the fan group, that is, the second pressure difference threshold is the trigger point for the fan group to enter the closed state. On this basis, this technical solution limits the specific way of adjusting and controlling the operating parameters of the multiple groups of fans in the chiller unit according to the pressure parameters of the chiller unit. Specifically, after calculating the system pressure difference of the chiller unit according to the operating high pressure and the operating low pressure of the chiller unit, the system pressure difference is compared with the closing pressure difference threshold (i.e. the second pressure difference threshold) of each group of fans in the multiple groups of fans. Once the closing pressure difference threshold of a group of fans is greater than or equal to the value of the system pressure difference, the fan group is controlled to be closed and stopped working.

[0028] In the above multiple groups of fans, the specific values of the shutdown pressure difference thresholds of different groups of fans are different, that is, the shutdown trigger points of different groups of fans are different. In this way, by setting different shutdown trigger points for different groups of fans, when the operating parameters of the water chiller unit are adjusted according to the pressure parameters of the water chiller unit, different groups of fans are triggered to start according to the actual system pressure difference of the water chiller unit. According to the difference in the number of started fan groups, the operating state of the water chiller unit changes to different degrees, so that it can adapt to various pressure parameter conditions. In this way, the operating range of the water chiller unit is improved, that is, the working adaptability of the water chiller unit is improved, so that the water chiller unit can work normally under different working conditions, ensuring the reliability of the water chiller unit, expanding the use range of the water chiller unit, and thus improving the overall performance of the water chiller unit.

[0029] Further, the first pressure difference threshold of each group of fans in the above multiple groups of fans is greater than the second pressure difference threshold, that is, the start pressure difference threshold of each group of fans is greater than the shutdown pressure difference threshold. In this way, for each group of fans, when the high-low pressure difference of the water chiller unit is large, the fan group is controlled to start working, and when the high-low pressure difference of the water chiller unit is small, the fan group is controlled to stop working.

[0030] In addition, the specific value or range of the second pressure difference threshold is related to factors such as product type, working refrigerant, and working condition demand of the water chiller unit. In actual application, the user can set the specific value or range of the second pressure difference threshold according to the product type, working refrigerant, and working condition demand of the water chiller unit, which is not limited here.

[0031] In any of the above technical solutions, after adjusting the operating state of the multiple groups of fans, the control method further comprises: determining the reset duration of each group of fans from the current operating state to the initial operating state; adjusting the preset pressure difference threshold of each group of fans according to the comparison result of the reset duration and the preset time threshold; and continuing to adjust the operating state of the multiple groups of fans according to the comparison result of the system pressure difference and the adjusted preset pressure difference threshold.

[0032] In the technical solution, after the running state (off state or start state) of each group of fans is adjusted according to the pressure parameter of the water chiller, the reset duration of the running state of each group of fans is obtained, and the preset pressure difference threshold of the corresponding fan group is adjusted according to the specific value of the reset duration. Specifically, after the reset duration of each group of fans is obtained, the set preset time threshold is compared with the reset duration, and then the preset pressure difference threshold of the fan group is adjusted according to the comparison result, and the next start-stop action of the fan group is controlled through the adjusted preset pressure difference threshold. In this way, through self-learning, the trigger point of the running state adjustment of each group of fans is gradually optimized according to the actual running condition of each group of fans, the accuracy and intelligence of the running state adjustment of the multiple groups of fans are improved, the accuracy, reliability, adaptability and intelligence of the water chiller working control are improved, and the overall performance of the water chiller is improved, thereby improving the product competitiveness of the water chiller.

[0033] It can be understood that after the running state of the fan group is adjusted according to the comparison result of the high-low pressure difference of the water chiller and the preset pressure difference threshold of the fan group, if the running state of the fan group changes to the state before the adjustment within a short time, it indicates that the value of the preset pressure difference threshold of the fan group is not suitable for the working parameters of the fan group. At this time, the reset duration of the running state of the fan group is obtained, and the preset pressure difference value of the fan group is adjusted according to the actual comparison result of the reset duration and the set preset time threshold, so as to optimize the trigger point of the running state adjustment of the fan group, thereby improving the reliability and adaptability of the water chiller operation, and improving the overall performance of the water chiller.

[0034] The specific value or range of the preset time threshold is related to product types, working refrigerants, working condition requirements and other influencing factors of the water chiller. In actual application, the user can set the specific value or range of the preset time threshold according to the product types, working refrigerants and working condition requirements of the water chiller, which is not limited here.

[0035] In any of the above technical solutions, the preset pressure difference threshold of each group of fans is adjusted according to the comparison result of the reset duration and the preset time threshold, specifically including: based on the reset duration being greater than the preset time threshold, the first pressure difference threshold of the corresponding fan group is reduced by a first preset adjustment amount, or the second pressure difference threshold of the corresponding fan group is increased by a second preset adjustment amount.

[0036] In the technical solution, the comparison result of the reset duration of each group of fans after the running state adjustment and the preset time threshold is used to adjust the state adjustment trigger point of the corresponding fan group. Specifically, when the preset time threshold is less than the reset duration of the fan group after the running state adjustment, it indicates that the duration after the running state adjustment of the fan group is relatively long. At this time, the running state adjustment trigger point of the fan group can be adjusted appropriately to make the fan group continue to run for a longer time after the running state adjustment.

[0037] Specifically, when the running state of the fan group is adjusted from the closed state to the started state and then back to the closed state, the started pressure difference threshold (i.e., the first pressure difference threshold) of the fan group can be reduced by a set first preset adjustment amount. When the running state of the fan group is adjusted from the started state to the closed state and then back to the started state, the closed pressure difference threshold (i.e., the second pressure difference threshold) of the fan group can be increased by a set second preset adjustment amount. In this way, when the running state adjustment of the corresponding fan group is triggered by the adjusted started pressure difference threshold or closed pressure difference threshold, the duration of the fan group after the running state adjustment is longer.

[0038] In addition, the specific values or ranges of the first preset adjustment amount and the second preset adjustment amount are related to product types, working refrigerants, and working condition requirements of the water chiller. In actual application, users can set the specific values or ranges of the first preset adjustment amount and the second preset adjustment amount according to the product types, working refrigerants, and working condition requirements of the water chiller, which are not limited here.

[0039] In any of the above technical solutions, the preset pressure difference threshold of each fan group is adjusted according to the comparison result of the reset duration and the preset time threshold, and specifically includes: based on the reset duration being less than or equal to the preset time threshold, increasing the first pressure difference threshold of the corresponding fan group by a first preset adjustment amount, or decreasing the second pressure difference threshold of the corresponding fan group by a second preset adjustment amount.

[0040] In the technical solution, the comparison result of the reset duration of each group of fans after the running state adjustment and the preset time threshold is used to adjust the state adjustment trigger point of the corresponding fan group. Specifically, when the preset time threshold is less than the reset duration of the fan group after the running state adjustment, it indicates that the duration after the running state adjustment of the fan group is relatively long. At this time, the running state adjustment trigger point of the fan group can be adjusted appropriately to make the fan group continue to run for a longer time after the running state adjustment.

[0041] Specifically, in the case that the running state of the group of fans is adjusted from the closed state to the start state and then back to the closed state, the start pressure difference threshold (i.e., the first pressure difference threshold) of the group of fans can be increased by a first preset adjustment amount; and in the case that the running state of the group of fans is adjusted from the start state to the closed state and then back to the start state, the closed pressure difference threshold (i.e., the second pressure difference threshold) of the group of fans can be decreased by a second preset adjustment amount. In this way, when the next running state adjustment of the corresponding fan group is triggered by the adjusted start pressure difference threshold or closed pressure difference threshold, the duration of the running state adjustment of the fan group will be shortened to adapt to the case that the reset duration of the group of fans is short.

[0042] In any of the above technical solutions, the running state of the chiller unit is adjusted according to the comparison result of the system pressure difference and the preset pressure difference threshold, and specifically further comprising: adjusting the running frequency of the multiple groups of fans according to the comparison result of the system pressure difference and the preset pressure difference threshold.

[0043] In this technical solution, the specific way of adjusting the running state of the chiller unit by the high-low pressure difference of the chiller unit is limited. Specifically, after calculating the system pressure difference of the chiller unit according to the running high pressure and the running low pressure of the chiller unit, the system pressure difference is compared with the preset pressure difference threshold, and then the running frequency of the multiple groups of fans in the chiller unit is adjusted according to the comparison result.

[0044] Specifically, after calculating the system pressure difference of the chiller unit according to the running high pressure and the running low pressure of the chiller unit, the system pressure difference is compared with the first pressure difference threshold of each group of fans in the multiple groups of fans, and once the first pressure difference threshold of a certain group of fans is less than or equal to the value of the system pressure difference, the running frequency of the group of fans is increased to run at a higher power. At the same time, the system pressure difference is compared with the second pressure difference threshold of each group of fans in the multiple groups of fans, and once the second pressure difference threshold of a certain group of fans is greater than or equal to the value of the system pressure difference, the running frequency of the group of fans is decreased to run at a lower power.

[0045] It should be noted that when the running state or the running frequency of the multiple groups of fans is adjusted according to the actual value of the system pressure difference of the chiller unit, the specific values of the first pressure difference threshold and the second pressure threshold used above can be the same or different, and the user can set them according to the actual unit type, working refrigerant, and working condition requirements, etc., which are not limited here.

[0046] In any of the above technical solutions, after detecting the suction pressure and the discharge pressure of the chiller unit, the control method further comprises: determining the system pressure ratio of the chiller unit according to the suction pressure and the discharge pressure; and adjusting the running state of the chiller unit according to the comparison result of the system pressure ratio and the preset pressure ratio threshold.

[0047] In the technical solution, after the operation high pressure and the operation low pressure of the water chiller are respectively acquired through the plurality of pressure sensors arranged on the water chiller, the pressure ratio between the operation high pressure and the operation low pressure is calculated according to the acquired operation high pressure and operation low pressure, and a high-low pressure ratio is obtained, that is, a system pressure ratio of the water chiller is obtained. On this basis, the running state of the water chiller is adjusted according to the comparison result of the preset pressure ratio threshold and the high-low pressure ratio calculated above, specifically, the running state or the running frequency of the plurality of fans in the water chiller is adjusted, so that the water chiller can adapt to the current high-low pressure ratio, thereby safely running under the current high-low pressure ratio running condition.

[0048] Among them, the control logic of adjusting the running state of the water chiller through the system pressure ratio of the water chiller is that the pressure difference related parameters in the control logic of adjusting the running state of the water chiller through the system pressure difference of the water chiller are replaced by pressure ratio related parameters, and the specific control logic can refer to the description in the above technical solution, which will not be discussed in detail here.

[0049] In addition, the specific value or range of the preset pressure ratio threshold is related to the product type of the water chiller, the working refrigerant, the working condition demand and other influencing factors. In the actual application process, the user can set the specific value or range of the preset pressure ratio threshold according to the product type of the water chiller, the working refrigerant and the working condition demand and other influencing factors, which is not limited specifically here.

[0050] According to the second aspect of the present application, a water chiller control device is provided, which comprises: a detection unit for detecting the suction pressure and the discharge pressure of the water chiller; a processing unit for determining the system pressure difference of the water chiller according to the suction pressure and the discharge pressure; and a control unit for adjusting the running state of the water chiller according to the comparison result of the system pressure difference and the preset pressure difference threshold.

[0051] The water chiller control device provided by the application comprises a detection unit, a processing unit and a control unit. During the operation of the water chiller, the detection unit obtains the operation high pressure and the operation low pressure of the water chiller respectively. Then, the processing unit calculates the pressure difference between the operation high pressure and the operation low pressure to obtain a high-low pressure difference, that is, a system pressure difference of the water chiller. On this basis, the control unit adjusts the operation state of the water chiller according to the comparison result of the preset pressure difference threshold and the high-low pressure difference calculated above, so that the water chiller can adapt to the current high-low pressure difference and thus safely operate under the current high-low pressure difference. In this way, the operation state of the water chiller is automatically controlled according to the operation high pressure and the operation low pressure, which ensures the accuracy, reliability and intelligence of the water chiller operation control, thereby improving the reliability, safety and accuracy of the water chiller operation and the overall performance of the water chiller, and thus improving the product competitiveness of the water chiller.

[0052] It can be understood that the operation range of the water chiller is affected by the high and low pressures, the system pressure difference and the system pressure ratio in the working environment. The control device proposed by the application adjusts the operation state of the water chiller according to the actual value of the high-low pressure difference of the water chiller, which ensures that the operation state of the water chiller matches the above pressure parameters in the working environment, thereby ensuring that the water chiller can operate normally under the current pressure parameters. That is, the working parameters of the water chiller are adjusted in real time according to the pressure parameters in the working environment, so that the water chiller can operate within a safe range under the pressure parameters of various working conditions. In this way, the operation range of the water chiller is improved, that is, the working adaptability of the water chiller is improved, so that the water chiller can work normally under different working conditions, ensuring the reliability of the water chiller operation, expanding the use range of the water chiller, and thus improving the overall performance of the water chiller.

[0053] Further, when the detection unit is used to obtain the operation high pressure and the operation low pressure of the water chiller respectively, the suction pressure at the suction port of the water chiller can be obtained as the operation low pressure of the water chiller, and the exhaust pressure at the exhaust port of the water chiller can be obtained as the operation high pressure of the water chiller. Then, the working of the water chiller is adjusted and controlled according to the obtained exhaust pressure (i.e. operation high pressure) and suction pressure (i.e. operation low pressure) of the water chiller, so as to enhance the working adaptability of the water chiller.

[0054] It should be noted that in actual application, the detection unit can also obtain the operation high pressure and the operation low pressure at other points on the high-low pressure system of the water chiller. The specific collection position of the operation high pressure and the operation low pressure of the water chiller can be selected by the user according to the actual situation, and is not limited here.

[0055] Furthermore, the specific value or range of the aforementioned preset differential pressure threshold is related to factors such as the product type of the chiller unit, the working refrigerant, and operating conditions. In practical applications, users can set the specific value or range of the aforementioned preset differential pressure threshold according to factors such as the product type of the chiller unit, the working refrigerant, and operating conditions; no specific restrictions are imposed here.

[0056] Therefore, in the chiller control device proposed in this invention, the high and low operating pressures of the chiller are detected by a detection unit, the system pressure difference of the chiller is calculated by a processing unit, and then the operating parameters of the chiller are adjusted by the control unit based on the actual value of the obtained system pressure difference. This ensures the accuracy, reliability, and intelligence of the chiller's operation control, improves the chiller's operating range (i.e., enhances its adaptability), expands its application scope, and enables the chiller to operate normally under different working conditions. This improves the reliability, safety, and accuracy of the chiller's operation, enhances its overall performance, and ultimately improves its product competitiveness.

[0057] According to a third aspect of the present invention, a chiller unit is provided, comprising: a memory storing a program or instructions; and a processor, which, when executing the program or instructions, implements the steps of the chiller unit control method as described in any of the above-described technical solutions. Therefore, the chiller unit proposed in the third aspect of the present invention possesses all the beneficial effects of the chiller unit control method in any of the technical solutions of the first aspect described above, and will not be elaborated further here.

[0058] According to a fourth aspect of the present invention, a chiller unit is provided, comprising: a chiller unit control device as described above; a first pressure sensor for detecting the intake pressure of the chiller unit; a second pressure sensor for detecting the exhaust pressure of the chiller unit; and the control device adjusting the operating state of the chiller unit according to the intake pressure, the exhaust pressure, and a preset differential pressure threshold.

[0059] The chiller unit proposed in the fourth aspect of the present invention includes the chiller unit control device in the above-mentioned technical solution. Therefore, it has all the beneficial effects of the chiller unit control device in the second aspect of the technical solution, which will not be repeated here.

[0060] In this technical solution, the chiller unit further includes a first pressure sensor for detecting the intake pressure of the chiller unit and a second pressure sensor for detecting the exhaust pressure of the chiller unit. The control device can adjust the operating status of the chiller unit based on the intake pressure and exhaust pressure detected by the pressure sensors, as well as a preset differential pressure threshold.

[0061] Specifically, the first pressure sensor is an air suction pressure sensor arranged at the air suction port of the water chiller, through which the exhaust pressure of the water chiller, i.e. the operation low pressure of the water chiller, is obtained. Further, the second pressure sensor is an exhaust pressure sensor arranged at the exhaust port of the water chiller, through which the exhaust pressure of the water chiller, i.e. the operation high pressure of the water chiller, is obtained. On this basis, the pressure difference between the operation high pressure and the operation low pressure is calculated to obtain a high-low pressure difference, i.e. a system pressure difference of the water chiller. On this basis, the operation state of the water chiller is adjusted according to the comparison result of the preset pressure difference threshold and the calculated high-low pressure difference, so that the water chiller can adapt to the current high-low pressure difference and thus safely operate under the current high-low pressure difference. In this way, the operation state of the water chiller is automatically controlled according to the operation high pressure and the operation low pressure of the water chiller, which ensures the accuracy, reliability and intelligence of the control of the water chiller, thereby improving the reliability, safety and accuracy of the operation of the water chiller and the overall performance of the water chiller, and thus improving the product competitiveness of the water chiller.

[0062] The water chiller according to the present application can have the following additional technical features.

[0063] In the above technical solution, the water chiller further comprises a plurality of groups of fans, and the control device controls the starting or stopping of the plurality of groups of fans according to the air suction pressure, the exhaust pressure and the preset pressure difference threshold.

[0064] In this technical solution, the water chiller further comprises a plurality of groups of fans, and the control device controls the starting or stopping of the plurality of groups of fans according to the air suction pressure, the exhaust pressure and the preset pressure difference threshold detected by the pressure sensor.

[0065] Specifically, the preset pressure difference threshold includes a first pressure difference threshold, which is the starting pressure difference threshold of the fan group, i.e. the first pressure difference threshold is the trigger point for the fan group to enter the starting state. After the system pressure difference of the water chiller is calculated according to the operation high pressure and the operation low pressure of the water chiller, the system pressure difference is compared with the starting pressure difference threshold (i.e. the first pressure difference threshold) of each group of fans in the plurality of groups of fans. Once the starting pressure difference threshold of a group of fans is less than or equal to the value of the system pressure difference, the group of fans is controlled to start working.

[0066] Further, the preset pressure difference threshold value can further include a second pressure difference threshold value, which is a closing pressure difference threshold value of the fan group, i.e., the second pressure difference threshold value is a trigger point for the fan group to enter a closing state. After the system pressure difference of the water chiller is calculated according to the operating high pressure and the operating low pressure, the system pressure difference is compared with the closing pressure difference threshold value (i.e., the second pressure difference threshold value) of each fan group in the plurality of fan groups. Once the closing pressure difference threshold value of a fan group is greater than or equal to the value of the system pressure difference, the fan group is controlled to be closed and stopped.

[0067] According to a fifth aspect of the present application, an air conditioner is provided, which comprises the water chiller in the third aspect or the water chiller in the fourth aspect. Therefore, the air conditioner in the fifth aspect has all the advantages of the water chiller in the third aspect or the water chiller in the fourth aspect, which will not be repeated here.

[0068] According to a sixth aspect of the present application, a readable storage medium is provided, which stores a program or instructions, and the program or instructions are executed by a processor to realize the water chiller control method in any of the above aspects. Therefore, the readable storage medium in the sixth aspect has all the advantages of the water chiller control method in any of the first aspect, which will not be repeated here.

[0069] Additional aspects and advantages of the present application will become apparent from the following description, or will be learned by practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0070] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood by considering the following detailed description, including the accompanying drawings, in which:

[0071] Figure 1 Fig. 1 shows a flowchart of a water chiller control method according to an embodiment of the present application;

[0072] Figure 2 Fig. 2 shows a flowchart of a water chiller control method according to another embodiment of the present application;

[0073] Figure 3 Fig. 3 shows a flowchart of a water chiller control method according to another embodiment of the present application;

[0074] Figure 4 Fig. 4 shows a flowchart of a water chiller control method according to another embodiment of the present application;

[0075] Figure 5 Fig. 5 shows a flowchart of a water chiller control method according to another embodiment of the present application;

[0076] Figure 6 Fig. 6 shows a flowchart of a chiller control method according to an embodiment of the present application;

[0077] Figure 7 Fig. 7 shows a flowchart of a chiller control method according to an embodiment of the present application;

[0078] Figure 8 Fig. 8 shows a flowchart of a chiller control method according to an embodiment of the present application;

[0079] Figure 9 Fig. 9 shows a flowchart of a chiller control method according to an embodiment of the present application;

[0080] Figure 10 Fig. 10 shows a structure block diagram of a chiller control device according to an embodiment of the present application;

[0081] Figure 11 Fig. 11 shows a structure block diagram of a chiller according to an embodiment of the present application;

[0082] Figure 12 Fig. 12 shows a structure block diagram of a chiller according to an embodiment of the present application;

[0083] Figure 13 Fig. 13 shows a structure block diagram of an air conditioner according to an embodiment of the present application;

[0084] Figure 14 Fig. 14 shows a structure block diagram of an air conditioner according to an embodiment of the present application;

[0085] Figure 15 Fig. 15 shows a differential pressure control diagram of multiple groups of fans according to an embodiment of the present application. DETAILED DESCRIPTION

[0086] In order to more clearly understand the above-mentioned purposes, features and advantages of the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0087] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application, however, the present application can also be implemented in other ways different from those described herein, therefore, the scope of protection of the present application is not limited to the specific embodiments disclosed below.

[0088] The chiller, the control method and device thereof, the air conditioner and the readable storage medium provided by the embodiments of the present application will be described in detail below with reference to specific embodiments and application scenarios. Figures 1 to 15

[0089] ​Embodiment one, Figure 1 A flowchart of one of the control methods of the water chiller unit according to the embodiments of the present application is shown. The control method includes the following steps S102 to S106:

[0090] In step S102, the running high pressure and the running low pressure of the water chiller unit are obtained.

[0091] In step S104, the system pressure difference of the water chiller unit is determined according to the running high pressure and the running low pressure.

[0092] In step S106, the running state of the water chiller unit is adjusted according to the comparison result of the system pressure difference and the preset pressure difference threshold.

[0093] The execution subject of the technical solution of the control method of the water chiller unit according to the embodiments of the present application can be the water chiller unit control device, and can also be determined according to actual use requirements, which is not specifically limited here. In order to more clearly describe the control method of the water chiller unit provided by the present application, the execution subject of the control method of the water chiller unit is taken as the water chiller unit control device for description below.

[0094] The control method of the water chiller unit provided by the embodiments of the present application obtains the running high pressure and the running low pressure of the water chiller unit through the multiple pressure sensors arranged on the water chiller unit. Then, the pressure difference between the obtained running high pressure and the running low pressure is calculated to obtain a high-low pressure difference, that is, a system pressure difference of the water chiller unit. On this basis, the running state of the water chiller unit is adjusted according to the comparison result of the preset pressure difference threshold and the calculated high-low pressure difference, so that the water chiller unit can adapt to the current high-low pressure difference and run safely under the current high-low pressure difference. In this way, the running state of the water chiller unit is automatically controlled according to the running high pressure and the running low pressure of the water chiller unit, which ensures the accuracy, reliability and intelligence of the control of the water chiller unit, thereby improving the reliability, safety and accuracy of the operation of the water chiller unit and the overall performance of the water chiller unit, thereby improving the product competitiveness of the water chiller unit.

[0095] Wherein, it can be understood that the operation range of the water chiller is affected by the high and low pressure of its working environment, the system pressure difference and the system pressure ratio. The above-mentioned control method adjusts the operation state of the water chiller by the actual value of the high and low pressure difference of the water chiller, which can ensure that the operation state of the water chiller matches the above-mentioned pressure parameters in the working environment, so as to ensure that the water chiller can work normally under the current pressure parameters. That is, the working parameters of the water chiller are adjusted in real time by the pressure parameters of the working environment of the water chiller, so that the water chiller can operate within a safe range under the pressure parameters of various working conditions. In this way, the operation range of the water chiller is improved, that is, the working adaptability of the water chiller is improved, so that the water chiller can work normally under different working conditions, ensuring the reliability of the water chiller, expanding the use range of the water chiller, and thus improving the overall performance of the water chiller.

[0096] Further, when the operation high pressure and the operation low pressure of the water chiller are obtained by the plurality of pressure sensors arranged on the water chiller, the operation low pressure of the water chiller can be obtained by the suction pressure sensor arranged at the suction port of the water chiller, and the operation high pressure of the water chiller can be obtained by the exhaust pressure sensor arranged at the exhaust port of the water chiller, and then the working of the water chiller is adjusted and controlled according to the obtained exhaust pressure (i.e. operation high pressure) and suction pressure (i.e. operation low pressure) of the water chiller, so as to enhance the working adaptability of the water chiller.

[0097] It should be noted that in actual application, the operation high pressure and the operation low pressure of the water chiller can also be obtained by the pressure sensors arranged at other points on the high and low pressure system of the water chiller. The specific collection positions of the operation high pressure and the operation low pressure of the water chiller can be selected by the user according to the actual situation, and are not limited here.

[0098] In addition, the specific value or range of the above-mentioned preset pressure difference threshold is related to factors such as the product type of the water chiller, the working refrigerant, and the working condition demand. In actual application, the user can set the specific value or range of the above-mentioned preset pressure difference threshold according to the product type of the water chiller, the working refrigerant, and the working condition demand, and is not limited here.

[0099] Therefore, in the water chiller control method provided in the embodiment of the present application, the system pressure difference of the water chiller is calculated by collecting the running high pressure and the running low pressure of the water chiller, and then the running parameters of the water chiller are adjusted according to the actual value of the obtained system pressure difference. In this way, the accuracy, reliability and intelligence of the water chiller working control are ensured, the running range of the water chiller is improved, that is, the working adaptability of the water chiller is improved, the use range of the water chiller is expanded, the water chiller can work normally in different working condition environments, and thus the reliability, safety and accuracy of the water chiller working are improved, the overall performance of the water chiller is improved, and then the product competitiveness of the water chiller is improved.

[0100] Embodiment two, Figure 2 A flowchart of a water chiller control method according to an embodiment of the present application is shown. In this embodiment, the water chiller is provided with multiple groups of fans, and the control method includes the following steps S202 to S206:

[0101] Step S202, obtaining the running high pressure and the running low pressure of the water chiller;

[0102] Step S204, determining the system pressure difference of the water chiller according to the running high pressure and the running low pressure;

[0103] Step S206, adjusting the running state of the multiple groups of fans according to the comparison result of the system pressure difference and the preset pressure difference threshold;

[0104] The running state includes the start state and the stop state.

[0105] In this embodiment, multiple groups of fans are provided in the water chiller, and on this basis, the specific way of adjusting the running parameters of the water chiller by the actual value of the system pressure difference is limited. Specifically, after the system pressure difference of the water chiller is calculated according to the running high pressure and the running low pressure of the water chiller, the system pressure difference is compared with the preset pressure difference threshold, and then the running state of the multiple groups of fans in the water chiller is adjusted according to the comparison result. The running state of the multiple groups of fans includes two states of the start state and the stop state, that is, the opening and closing of the multiple groups of fans in the water chiller are controlled according to the comparison result between the obtained system pressure difference and the preset pressure difference threshold.

[0106] In the multiple groups of fans, the preset pressure difference threshold values of different groups of fans are different, that is, the trigger points of the operation state adjustment of the multiple groups of fans are different. In this way, by setting different trigger points for different groups of fans, when the operation parameters of the water chiller unit are adjusted according to the pressure parameters of the water chiller unit, different groups of fans are triggered to change the operation state according to the actual system pressure difference of the water chiller unit, that is, different numbers of fans are started or stopped, so that the operation state of the water chiller unit is changed to adapt to multiple pressure parameter conditions. In this way, the operation range of the water chiller unit is improved, that is, the working adaptability of the water chiller unit is improved, so that the water chiller unit can work normally under different working conditions, the reliability of the water chiller unit is ensured, the use range of the water chiller unit is expanded, and the overall performance of the water chiller unit is improved.

[0107] Embodiment three, Figure 3 A third flowchart of a water chiller unit control method according to an embodiment of the present application is shown. In this embodiment, the preset pressure difference threshold value includes a first pressure difference threshold value, and the control method includes the following steps S302 to S308:

[0108] Step S302, obtaining the operation high pressure and the operation low pressure of the water chiller unit;

[0109] Step S304, determining the system pressure difference of the water chiller unit according to the operation high pressure and the operation low pressure;

[0110] Step S306, comparing the first pressure difference threshold value of each group of fans in the multiple groups of fans with the system pressure difference;

[0111] Step S308, in the case where the first pressure difference threshold value is less than or equal to the system pressure difference, controlling the corresponding group of fans to start.

[0112] In this embodiment, the preset pressure difference threshold value includes a first pressure difference threshold value, which is the starting pressure difference threshold value of the group of fans, that is, the first pressure difference threshold value is the trigger point of the group of fans entering the starting state. On this basis, this embodiment limits the specific way of adjusting and controlling the operation parameters of the multiple groups of fans in the water chiller unit according to the pressure parameters of the water chiller unit. Specifically, after the system pressure difference of the water chiller unit is calculated according to the operation high pressure and the operation low pressure of the water chiller unit, the system pressure difference is compared with the starting pressure difference threshold value (that is, the first pressure difference threshold value) of each group of fans in the multiple groups of fans. Once the starting pressure difference threshold value of a group of fans is less than or equal to the value of the system pressure difference, the group of fans is controlled to start working.

[0113] In this embodiment, the preset pressure difference threshold value includes a first pressure difference threshold value, which is the starting pressure difference threshold value of the group of fans, that is, the first pressure difference threshold value is the trigger point of the group of fans entering the starting state. On this basis, this embodiment limits the specific way of adjusting and controlling the operation parameters of the multiple groups of fans in the water chiller unit according to the pressure parameters of the water chiller unit. Specifically, after the system pressure difference of the water chiller unit is calculated according to the operation high pressure and the operation low pressure of the water chiller unit, the system pressure difference is compared with the starting pressure difference threshold value (that is, the first pressure difference threshold value) of each group of fans in the multiple groups of fans. Once the starting pressure difference threshold value of a group of fans is less than or equal to the value of the system pressure difference, the group of fans is controlled to start working. Figure 15As shown, in the above multiple groups of fans, the specific values of the start-up pressure difference threshold of different groups of fans are different, that is, the start-up trigger points of different groups of fans are different. In this way, by setting different start-up trigger points for different groups of fans, when the operating parameters of the water chiller unit are adjusted according to the pressure parameters of the water chiller unit, different groups of fans are triggered to start according to the actual system pressure difference of the water chiller unit. According to the difference of the number of started fan groups, the operating state of the water chiller unit changes to different degrees, so as to adapt to various pressure parameter conditions. In this way, the operating range of the water chiller unit is improved, that is, the working adaptability of the water chiller unit is improved, so that the water chiller unit can work normally under different working conditions, ensuring the reliability of the water chiller unit, expanding the use range of the water chiller unit, and further improving the overall performance of the water chiller unit.

[0114] Exemplarily, as Figure 15 As shown, N groups of fans are provided in the water chiller unit, wherein the start-up pressure difference threshold of the first group to the Nth group of fans, that is, the first pressure difference threshold, is Pon1-PonN respectively, wherein Pon1-PonN increases in turn. That is, when all the N groups of fans are in the closed state, the first group of fans to the Nth group of fans are triggered to start in turn as the system pressure difference of the water chiller unit continuously increases.

[0115] In addition, the specific value or range of the first pressure difference threshold is related to factors such as product type, working refrigerant, and working condition demand of the water chiller unit. In actual application, the user can set the specific value or range of the first pressure difference threshold according to the product type, working refrigerant, and working condition demand of the water chiller unit, which is not limited here.

[0116] Embodiment four, Figure 4 A fourth flowchart of the water chiller unit control method of the embodiment of the application is shown. In this embodiment, the preset pressure difference threshold further includes a second pressure difference threshold, and the control method includes the following steps S402 to S408:

[0117] Step S402, obtaining the operating high pressure and the operating low pressure of the water chiller unit;

[0118] Step S404, determining the system pressure difference of the water chiller unit according to the operating high pressure and the operating low pressure;

[0119] Step S406, comparing the second pressure difference threshold of each group of fans in the multiple groups of fans with the system pressure difference;

[0120] Step S408, controlling the corresponding fan group to be closed in the case that the second pressure difference threshold is greater than or equal to the system pressure difference;

[0121] Wherein, the first pressure difference threshold of each group of fans is greater than the second pressure difference threshold.

[0122] In this embodiment, the aforementioned preset differential pressure threshold may further include a second differential pressure threshold, which is the shut-off differential pressure threshold of the fan unit, i.e., the trigger point for the fan unit to enter the shut-off state. Based on this, this embodiment specifies the detailed method for adjusting and controlling the operating parameters of multiple fan groups using the pressure parameters of the chiller unit. Specifically, after calculating the system differential pressure of the chiller unit based on its operating high and low pressures, the system differential pressure is compared with the shut-off differential pressure threshold (i.e., the aforementioned second differential pressure threshold) of each fan group. Once the shut-off differential pressure threshold of a certain fan group is greater than or equal to the value of the system differential pressure, that fan group is controlled to shut down and stop working.

[0123] Among them, such as Figure 15 As shown, among the aforementioned multiple groups of fans, the specific values ​​of the shut-off differential pressure thresholds differ between groups, meaning the shut-off trigger points differ for each group. Thus, by setting different shut-off trigger points for different groups of fans, when adjusting the chiller's operating parameters based on its pressure parameters, the actual system differential pressure causes different numbers of fans to be triggered and started. The varying number of fan groups activated alters the chiller's operating state to different degrees, allowing it to adapt to various pressure parameter conditions. This expands the chiller's operating range, enhancing its adaptability and enabling it to function normally under different operating conditions, ensuring reliability, broadening its application scope, and ultimately improving its overall performance.

[0124] For example, such as Figure 15 As shown, the chiller unit is equipped with N sets of fans. The shut-off differential pressure thresholds (also known as the second differential pressure thresholds) for the first to Nth sets of fans are Poff1 to PoffN, respectively, with Poff1 increasing sequentially to PoffN. In other words, with all N sets of fans on, as the system differential pressure of the chiller unit decreases, the Nth to the first set of fans are sequentially triggered to shut down.

[0125] Furthermore, the first differential pressure threshold of each of the aforementioned multiple fan groups is greater than its second differential pressure threshold, meaning that the starting differential pressure threshold of each fan group is greater than its shut-off differential pressure threshold. Thus, for each fan group, when the high and low pressure difference of the chiller unit is large, the fan group is controlled to start operating; conversely, when the high and low pressure difference of the chiller unit is small, the fan group is controlled to shut down to stop operating.

[0126] In addition, the specific value or range of the second pressure difference threshold is related to product type, working refrigerant, and working condition requirement of the water chiller. In actual application, the user can set the specific value or range of the second pressure difference threshold according to the product type, working refrigerant, and working condition requirement of the water chiller, which is not specifically limited herein.

[0127] Embodiment five, Figure 5 A flowchart of a fifth embodiment of the water chiller control method is shown. The control method includes the following steps S502 to S512:

[0128] Step S502, obtaining the running high pressure and the running low pressure of the water chiller;

[0129] Step S504, determining the system pressure difference of the water chiller according to the running high pressure and the running low pressure;

[0130] Step S506, adjusting the running state of the multiple groups of fans according to the comparison result of the system pressure difference and the preset pressure difference threshold;

[0131] Step S508, determining the reset duration of each group of fans from the current running state to the initial running state;

[0132] Step S510, adjusting the preset pressure difference threshold of each group of fans according to the comparison result of the reset duration and the preset time threshold;

[0133] Step S512, continuing to adjust the running state of the multiple groups of fans according to the comparison result of the system pressure difference and the adjusted preset pressure difference threshold.

[0134] In this embodiment, after the running state (off state or start state) of the multiple groups of fans is adjusted according to the pressure parameters of the water chiller, the reset duration of each group of fans whose running state is adjusted from the current running state to the initial running state, i.e., the running state before adjustment, is also obtained, and the preset pressure difference threshold of the corresponding fan group is adjusted according to the specific value of the reset duration. Specifically, after the reset duration of each group of fans is obtained, the set preset time threshold is compared with the reset duration, and then the preset pressure difference threshold of the group of fans is adjusted according to the comparison result of the two, and then the next start-stop action of the group of fans is controlled through the adjusted preset pressure difference threshold. In this way, through self-learning, the trigger point of the running state adjustment of each group of fans is gradually optimized according to the actual running condition of the group of fans, the accuracy and intelligence of the running state adjustment of the multiple groups of fans are improved, the accuracy, reliability, adaptability, and intelligence of the working control of the water chiller are improved, and the overall performance of the water chiller is improved, thereby improving the product competitiveness of the water chiller.

[0135] It can be understood that, after the running state of the group of fans is adjusted according to the comparison result of the high-low pressure difference of the water chiller unit and the preset pressure difference threshold of the group of fans, if the running state of the group of fans changes to the state before the adjustment again within a short time, it indicates that the numerical value of the preset pressure difference threshold of the group of fans is not suitable for the working parameters of the group of fans. At this time, the reset duration of the running state of the group of fans is obtained, and the preset pressure difference value of the group of fans is adjusted according to the actual comparison result of the reset duration and the set preset time threshold, so as to optimize the preset pressure difference threshold of the group of fans, that is, the trigger point of the running state adjustment, thereby improving the reliability and adaptability of the water chiller unit running, and improving the overall performance of the water chiller unit.

[0136] The specific numerical value or range of the preset time threshold is related to product types, working refrigerants, and working condition requirements of the water chiller unit. In actual application, the user can set the specific numerical value or range of the preset time threshold according to the product types, working refrigerants, and working condition requirements of the water chiller unit, which is not limited here.

[0137] Embodiment six, Figure 6 Fig. 6 shows a flowchart of a control method of a water chiller unit according to an embodiment of the present application. The control method comprises the following steps S602 to S614:

[0138] In step S602, the running high pressure and the running low pressure of the water chiller unit are obtained.

[0139] In step S604, the system pressure difference of the water chiller unit is determined according to the running high pressure and the running low pressure.

[0140] In step S606, the running state of the group of fans is adjusted according to the comparison result of the system pressure difference and the preset pressure difference threshold.

[0141] In step S608, the reset duration of each group of fans from the current running state to the initial running state is determined.

[0142] In step S610, in the case that the preset time threshold is less than the reset duration, the first pressure difference threshold of the corresponding group of fans is reduced by the first preset adjustment amount, or the second pressure difference threshold of the corresponding group of fans is increased by the second preset adjustment amount.

[0143] In step S612, in the case that the preset time threshold is greater than or equal to the reset duration, the first pressure difference threshold of the corresponding group of fans is increased by the first preset adjustment amount, or the second pressure difference threshold of the corresponding group of fans is reduced by the second preset adjustment amount.

[0144] Step S614, according to the comparison result of the system pressure difference and the adjusted preset pressure difference threshold, continue to adjust the running state of each group of fans.

[0145] In this embodiment, the specific way of adjusting the state adjustment trigger point of the corresponding fan group according to the comparison result of the preset time threshold and the reset time of each group of fans after the running state adjustment is limited.

[0146] Wherein, in the case that the preset time threshold is less than the reset time of the fan after the running state adjustment of a certain group, it means that the duration of the running state adjustment of this group of fans is longer, at this time, the running state adjustment trigger point of this group of fans can be adjusted appropriately to make the group of fans continue to run for a longer time after the running state adjustment.

[0147] Specifically, in the case that the running state of the group of fans is adjusted from the closed state to the start state and then to the closed state again, the start pressure difference threshold (i.e. the first pressure difference threshold) of the group of fans can be reduced by a set first preset adjustment amount; and in the case that the running state of the group of fans is adjusted from the start state to the closed state and then to the start state again, the closed pressure difference threshold (i.e. the second pressure difference threshold) of the group of fans can be increased by a set second preset adjustment amount. In this way, when the next running state adjustment of the corresponding fan group is triggered by the adjusted start pressure difference threshold or closed pressure difference threshold, the duration of the fan group after the running state adjustment is longer.

[0148] Further, in the case that the preset time threshold is greater than the reset time of the fan after the running state adjustment of a certain group, it means that the duration of the running state adjustment of this group of fans is shorter, at this time, the running state adjustment trigger point of this group of fans can be adjusted appropriately to make the duration of the group of fans after the running state adjustment shorter to adapt to the shorter reset time of the group of fans.

[0149] Specifically, in the case that the running state of the group of fans is adjusted from the closed state to the start state and then to the closed state again, the start pressure difference threshold (i.e. the first pressure difference threshold) of the group of fans can be increased by a set first preset adjustment amount; and in the case that the running state of the group of fans is adjusted from the start state to the closed state and then to the start state again, the closed pressure difference threshold (i.e. the second pressure difference threshold) of the group of fans can be reduced by a set second preset adjustment amount. In this way, when the next running state adjustment of the corresponding fan group is triggered by the adjusted start pressure difference threshold or closed pressure difference threshold, the duration of the fan group after the running state adjustment will be shorter to adapt to the shorter reset time of the group of fans.

[0150] In addition, the specific values or ranges of the first preset adjustment amount and the second preset adjustment amount are related to product types of the water chiller, working refrigerants, and working condition requirements. In actual application, the user can set the specific values or ranges of the first preset adjustment amount and the second preset adjustment amount according to the product types of the water chiller, the working refrigerants, and the working condition requirements, which are not specifically limited herein.

[0151] Embodiment seven, Figure 7 Fig. 7 shows a flowchart of a control method of a water chiller according to an embodiment of the present application. The control method comprises the following steps S702 to S706:

[0152] In step S702, the running high pressure and the running low pressure of the water chiller are obtained.

[0153] In step S704, the system pressure difference of the water chiller is determined according to the running high pressure and the running low pressure.

[0154] In step S706, the running frequencies of the multiple groups of fans are adjusted according to the comparison result of the system pressure difference and the preset pressure difference threshold.

[0155] In this embodiment, the specific manner of adjusting the running state of the water chiller by the high-low pressure difference of the water chiller is limited. Specifically, after the system pressure difference of the water chiller is calculated according to the running high pressure and the running low pressure, the system pressure difference is compared with the preset pressure difference threshold, and then the running frequencies of the multiple groups of fans in the water chiller are adjusted according to the comparison result.

[0156] Specifically, after the system pressure difference of the water chiller is calculated according to the running high pressure and the running low pressure, the system pressure difference is compared with the first pressure difference threshold of each group of fans in the multiple groups of fans. Once the first pressure difference threshold of a group of fans is less than or equal to the value of the system pressure difference, the running frequency of the group of fans is increased so that the group of fans runs at a higher power. Meanwhile, the system pressure difference is compared with the second pressure difference threshold of each group of fans in the multiple groups of fans. Once the second pressure difference threshold of a group of fans is greater than or equal to the value of the system pressure difference, the running frequency of the group of fans is decreased so that the group of fans runs at a lower power.

[0157] It should be noted that when the running state or the running frequency of the multiple groups of fans is adjusted according to the actual value of the system pressure difference of the water chiller, the specific values of the first pressure difference threshold and the second pressure threshold can be the same or different, which can be set by the user according to the actual unit type, the working refrigerant, and the working condition requirement, which are not specifically limited herein.

[0158] Embodiment eight, Figure 8Fig. 8 shows a flowchart of a control method of a water chiller according to an embodiment of the present application. The control method comprises the following steps S802-S806.

[0159] In step S802, the high pressure and the low pressure of the water chiller are obtained.

[0160] In step S804, the system pressure ratio of the water chiller is determined according to the high pressure and the low pressure.

[0161] In step S806, the operation state of the water chiller is adjusted according to the comparison result of the system pressure ratio and the preset pressure ratio threshold.

[0162] In this embodiment, after the high pressure and the low pressure of the water chiller are obtained by the pressure sensors arranged on the water chiller, the pressure ratio between the high pressure and the low pressure is calculated to obtain a high-low pressure ratio, i.e., a system pressure ratio of the water chiller. Then, the operation state of the water chiller is adjusted according to the comparison result of the preset pressure ratio threshold and the high-low pressure ratio, specifically, the operation state or the operation frequency of the multiple groups of fans in the water chiller is adjusted, so that the water chiller can adapt to the current high-low pressure ratio and run safely under the current high-low pressure ratio.

[0163] The control logic of adjusting the operation state of the water chiller according to the system pressure ratio of the water chiller is that the pressure difference related parameters in the control logic of adjusting the operation state of the water chiller according to the system pressure difference of the water chiller are replaced by the pressure ratio related parameters. The specific control logic can refer to the description in the above technical solution, which will not be discussed in detail here.

[0164] In addition, the specific value or range of the preset pressure ratio threshold is related to the product type, working refrigerant and working condition demand of the water chiller. In actual application, the user can set the specific value or range of the preset pressure ratio threshold according to the product type, working refrigerant and working condition demand of the water chiller, which will not be limited here.

[0165] Embodiment Nine, Figure 9 Fig. 9 shows a flowchart of a control method of a water chiller according to an embodiment of the present application. The control method specifically comprises the following steps S902-S926.

[0166] In step S902, the related enablement / parameters are set.

[0167] In step S904, the water chiller runs.

[0168] In step S906, the related parameters are detected and calculated.

[0169] Step S908, it is judged whether the related parameters satisfy: Pt≥Pon1~PonN, if yes, step S912 is executed, if not, step S910 is executed;

[0170] Step S910, the unit operation state remains unchanged;

[0171] Step S912, the corresponding fan unit is started;

[0172] Step S914, it is judged whether the related parameters satisfy: Pt≤Poff1~PoffN, if yes, step S918 is executed, if not, step S916 is executed;

[0173] Step S916, the unit operation state remains unchanged;

[0174] Step S918, the corresponding fan unit is stopped;

[0175] Step S920, the reset time t of the same group fan is calculated;

[0176] Step S922, it is judged whether the reset time t satisfies: t>ts, if yes, step S926 is executed, if not, step S924 is executed;

[0177] Step S924, the Pon set value is increased by PD1, or the Poff set value is decreased by PD2;

[0178] Step S926, the Pon set value is decreased by PD1, or the Poff set value is increased by PD2.

[0179] Wherein, Pt is equivalent to the above system pressure difference, Pon1~PonN is equivalent to the first pressure difference threshold of the first group fan to the Nth group fan in the above multiple group fans, Poff1~PoffN is equivalent to the second pressure difference threshold of the first group fan to the Nth group fan in the above multiple group fans, t is the above reset time, ts is the above preset time threshold, the Pon set value is the first pressure difference threshold of a group of fans corresponding to the reset time t, PD1 is equivalent to the above first preset adjustment amount, the Poff set value is the second pressure difference threshold of a group of fans corresponding to the reset time t, and PD2 is equivalent to the above second preset adjustment amount.

[0180] In this embodiment, during the application of the water chiller, firstly, the enabling and control parameters of the water chiller are set. Specifically, the self-learning enabling of the water chiller is set as ON by default, so that the water chiller optimizes its control parameters through self-learning. Further, the specific values of the control parameters, i.e., the above-mentioned Pon1-PonN, Poff1-PoffN, ts, PD1 and PD2, are set. After the parameter setting is completed, the operating high pressure and the operating low pressure of the water chiller are detected, and then the system pressure difference Pt of the water chiller is obtained according to the difference between the operating high pressure and the operating low pressure.

[0181] On this basis, it is judged whether Pt is greater than or equal to any value in Pon1-PonN, if yes, the corresponding group of fans is started, if not, the operating state of the unit is kept unchanged. At the same time, it is judged whether Pt is less than or equal to any value in Poff1-PoffN, if yes, the corresponding group of fans is stopped, if not, the operating state of the unit is kept unchanged. Further, the reset time t of the operating state of the fan group after the operating state adjustment is calculated, and it is judged whether it satisfies t>ts, if yes, the Pon set value of the corresponding fan group is reduced by PD1, or the Poff set value of the corresponding unit is increased by PD2; if not, the Pon set value of the corresponding fan group is increased by PD1, or the Poff set value of the corresponding fan group is reduced by PD2.

[0182] Specifically, if t>ts, in the case that the operating state of the fan group is adjusted from the shutdown state to the start state and then returns to the shutdown state, the Pon set value of the fan group is reduced by PD1; and in the case that the operating state of the fan group is adjusted from the start state to the shutdown state and then returns to the start state, the Poff set value of the fan group is increased by PD2. If t<ts, in the case that the operating state of the fan group is adjusted from the shutdown state to the start state and then returns to the shutdown state, the Pon set value of the fan group is increased by PD1; and in the case that the operating state of the fan group is adjusted from the start state to the shutdown state and then returns to the start state, the Poff set value of the fan group is reduced by PD2.

[0183] Embodiment Nine, Figure 10 The structural block diagram of the water chiller control device 1000 of the embodiment of the application is shown. The control device includes a detection unit 1002, a processing unit 1004 and a control unit 1006:

[0184] The detection unit 1002 is used to obtain the operating high pressure and the operating low pressure of the water chiller;

[0185] The processing unit 1004 is used to determine the system pressure difference of the water chiller according to the operating high pressure and the operating low pressure;

[0186] The control unit 1006 is configured to adjust the operation state of the water chiller according to a comparison result of the system pressure difference and the preset pressure difference threshold.

[0187] The water chiller control device 1000 provided by the embodiment of the present application comprises a detection unit 1002, a processing unit 1004 and a control unit 1006. During the operation of the water chiller, the detection unit 1002 is configured to acquire the operation high pressure and the operation low pressure of the water chiller respectively. Then, the processing unit 1004 is configured to calculate the pressure difference between the operation high pressure and the operation low pressure, and obtain a high-low pressure difference, i.e., a system pressure difference of the water chiller. On this basis, the control unit 1006 is configured to adjust the operation state of the water chiller according to a comparison result of the preset pressure difference threshold and the high-low pressure difference, so that the water chiller can adapt to the current high-low pressure difference and thus operate safely under the current high-low pressure difference. In this way, the operation state of the water chiller is automatically controlled according to the operation high pressure and the operation low pressure, which ensures the accuracy, reliability and intelligence of the control of the water chiller, thereby improving the reliability, safety and accuracy of the operation of the water chiller and the overall performance of the water chiller, and thus improving the product competitiveness of the water chiller.

[0188] It can be understood that the operation range of the water chiller is affected by the high pressure and the low pressure of the working environment, the system pressure difference and the system pressure ratio. The control device provided by the embodiment of the present application adjusts the operation state of the water chiller according to the actual value of the high-low pressure difference of the water chiller, which can ensure that the operation state of the water chiller matches the above pressure parameters in the working environment, thereby ensuring that the water chiller can operate normally under the current pressure parameters. That is, the working parameters of the water chiller are adjusted in real time according to the pressure parameters of the working environment, so that the water chiller can operate within a safe range under the pressure parameters of various working conditions. In this way, the operation range of the water chiller is improved, i.e., the working adaptability of the water chiller is improved, so that the water chiller can operate normally under different working conditions, ensuring the reliability of the water chiller, expanding the use range of the water chiller, and thus improving the overall performance of the water chiller.

[0189] Further, when the detection unit 1002 is configured to acquire the operation high pressure and the operation low pressure of the water chiller respectively, the suction pressure at the suction port of the water chiller can be acquired as the operation low pressure of the water chiller, and the exhaust pressure at the exhaust port of the water chiller can be acquired as the operation high pressure of the water chiller. Then, the operation of the water chiller is adjusted and controlled according to the exhaust pressure (i.e., the operation high pressure) and the suction pressure (i.e., the operation low pressure) of the water chiller, so as to enhance the working adaptability of the water chiller.

[0190] It should be noted that, in the actual application process, the detection unit 1002 can also obtain the operating high pressure and the operating low pressure of other points on the high and low pressure system of the water chiller. The user can select the specific collection position of the operating high pressure and the operating low pressure of the water chiller according to the actual situation, and this is not specifically limited here.

[0191] In addition, the specific value or range of the above-mentioned preset pressure difference threshold is related to factors such as the product type of the water chiller, the working refrigerant, and the working condition requirement. In the actual application process, the user can set the specific value or range of the above-mentioned preset pressure difference threshold according to the product type of the water chiller, the working refrigerant, and the working condition requirement, and this is not specifically limited here.

[0192] Therefore, in the water chiller control device 1000 proposed in the embodiment of the application, the detection unit 1002 detects the operating high pressure and the operating low pressure of the water chiller, so as to calculate the system pressure difference of the water chiller through the processing unit 1004, and then adjust the operating parameters of the water chiller according to the actual value of the obtained system pressure difference through the control unit 1006. In this way, the accuracy, reliability, and intelligence of the water chiller working control are ensured, the operating range of the water chiller is improved, that is, the working adaptability of the water chiller is improved, the use range of the water chiller is expanded, the water chiller can adapt to different working condition environments and work normally, thereby improving the reliability, safety, and accuracy of the water chiller working, improving the overall performance of the water chiller, and further improving the product competitiveness of the water chiller.

[0193] In this embodiment, further, the water chiller is provided with multiple groups of fans, and the control unit 1006 can be specifically used for adjusting the operating state of the multiple groups of fans according to the comparison result of the system pressure difference and the preset pressure difference threshold; wherein the operating state includes a start state and a stop state.

[0194] In this embodiment, further, the preset pressure difference threshold includes a first pressure difference threshold, and the processing unit 1004 can be specifically used for comparing the first pressure difference threshold of each group of fans in the multiple groups of fans with the system pressure difference; and the control unit 1006 can be specifically used for controlling the corresponding fan group to start in the case that the first pressure difference threshold is less than or equal to the system pressure difference.

[0195] In this embodiment, further, the preset pressure difference threshold also includes a second pressure difference threshold, and the processing unit 1004 can be specifically used for comparing the second pressure difference threshold of each group of fans in the multiple groups of fans with the system pressure difference; and the control unit 1006 can be specifically used for controlling the corresponding fan group to stop in the case that the second pressure difference threshold is greater than or equal to the system pressure difference; wherein the first pressure difference threshold of each group of fans is greater than the second pressure difference threshold.

[0196] In this embodiment, further, the processing unit 1004 can be specifically configured to: determine a reset duration for each group of the plurality of groups of fans to recover from the current operating state to the initial operating state; and adjust a preset pressure difference threshold of each group of the plurality of groups of fans according to a comparison result of the reset duration and a preset time threshold.

[0197] In this embodiment, further, the processing unit 1004 can be specifically configured to: in a case where the preset time threshold is less than the reset duration, decrease the first pressure difference threshold of the corresponding group of fans by a first preset adjustment amount, or increase the second pressure difference threshold of the corresponding group of fans by a second preset adjustment amount; and in a case where the preset time threshold is greater than or equal to the reset duration, increase the first pressure difference threshold of the corresponding group of fans by the first preset adjustment amount, or decrease the second pressure difference threshold of the corresponding group of fans by the second preset adjustment amount.

[0198] In this embodiment, further, the control unit 1006 can be further configured to: adjust an operating frequency of the plurality of groups of fans according to a comparison result of the system pressure difference and the preset pressure difference threshold.

[0199] In this embodiment, further, the processing unit 1004 can be further configured to: determine a system pressure ratio of the chiller unit according to the operating high pressure and the operating low pressure; and the control unit 1006 can be further configured to: adjust an operating state of the chiller unit according to a comparison result of the system pressure ratio and a preset pressure ratio threshold.

[0200] Embodiment eleven, Figure 11 A structural block diagram of the chiller unit 1100 provided by the embodiments of the present application is shown. The chiller unit 1100 includes:

[0201] a memory 1102, the memory 1102 storing programs or instructions;

[0202] a processor 1104, the processor 1104 implementing the steps of the chiller unit control method in any of the above embodiments when executing the above programs or instructions.

[0203] The chiller unit 1100 provided by the present embodiment includes the memory 1102 and the processor 1104, and the programs or instructions in the memory 1102 are executed by the processor 1104 to implement the steps of the chiller unit control method in any of the above embodiments, so that the chiller unit 1100 has all the beneficial effects of the chiller unit control method in any of the above embodiments, which will not be repeated here.

[0204] Specifically, the memory 1102 and the processor 1104 can be connected by a bus or other means. The processor 1104 can include one or more processing units, and the processor 1104 can be a central processing unit (CPU), a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), or the like chip.

[0205] Embodiment Twelve, Figure 12 A structure block diagram of a water chiller 1200 provided by an embodiment of the present application is shown, wherein the water chiller 1200 comprises the water chiller control device 1000 in the above embodiments, and thus the water chiller 1200 has all the beneficial effects of the water chiller control device 1000 in any of the above embodiments, which will not be repeated here.

[0206] In this embodiment, further, the water chiller 1200 further comprises a first pressure sensor 1202 for detecting the suction pressure of the water chiller 1200, and a second pressure sensor 1204 for detecting the discharge pressure of the water chiller 1200. The above control device can adjust the operating state of the water chiller 1200 according to the suction pressure and the discharge pressure detected by the pressure sensors and the preset pressure difference threshold.

[0207] Specifically, the first pressure sensor 1202 is an intake pressure sensor arranged at the intake port of the water chiller 1200, through which the exhaust pressure of the water chiller 1200, i.e. the running low pressure of the water chiller 1200, is obtained. Further, the second pressure sensor 1204 is an exhaust pressure sensor arranged at the exhaust port of the water chiller 1200, through which the exhaust pressure of the water chiller 1200, i.e. the running high pressure of the water chiller 1200, is obtained. On this basis, according to the obtained running high pressure and running low pressure, the pressure difference between the two is calculated to obtain a high-low pressure difference, i.e. a system pressure difference of the water chiller 1200. On this basis, according to the comparison result of the preset pressure difference threshold and the calculated high-low pressure difference, the running state of the water chiller 1200 is adjusted so that the water chiller 1200 can adapt to the current high-low pressure difference and thus run safely under the current high-low pressure difference. In this way, the running state of the water chiller 1200 is automatically controlled according to the running high pressure and running low pressure of the water chiller 1200, which ensures the accuracy, reliability and intelligence of the control of the water chiller 1200, thereby improving the reliability, safety and accuracy of the operation of the water chiller 1200 and the overall performance of the water chiller 1200, thereby improving the product competitiveness of the water chiller 1200.

[0208] In this embodiment, further, the water chiller 1200 further comprises a plurality of groups of fans 1206, and the control device is capable of controlling the starting or stopping of the plurality of groups of fans 1206 according to the intake pressure and exhaust pressure detected by the pressure sensors and the preset pressure difference threshold.

[0209] Specifically, the preset pressure difference threshold comprises a first pressure difference threshold, which is the starting pressure difference threshold of the fan group, i.e. the trigger point for the fan group to enter the starting state. After the system pressure difference of the water chiller 1200 is calculated according to the running high pressure and running low pressure of the water chiller 1200, the system pressure difference is compared with the starting pressure difference threshold (i.e. the first pressure difference threshold) of each group of fans 1206, and once the starting pressure difference threshold of a group of fans is less than or equal to the value of the system pressure difference, the group of fans is controlled to start working.

[0210] Further, the preset differential pressure threshold value can further include a second differential pressure threshold value, which is a closing differential pressure threshold value of the fan group, i.e., the second differential pressure threshold value is a trigger point for the fan group to enter a closing state. After the system differential pressure of the water chiller 1200 is calculated according to the operating high pressure and the operating low pressure of the water chiller 1200, the system differential pressure is compared with the closing differential pressure threshold value (i.e., the second differential pressure threshold value) of each fan group in the plurality of fan groups 1206. Once the closing differential pressure threshold value of a fan group is greater than or equal to the value of the system differential pressure, the fan group is controlled to be closed and stop working.

[0211] Embodiment thirteen, Figure 13 A structural block diagram of an air conditioner 1300 provided by an embodiment of the present application is shown. The air conditioner 1300 includes the water chiller 1100 in the above embodiments.

[0212] The air conditioner 1300 provided by the embodiment of the present application includes the water chiller 1100 in the above embodiments. Therefore, the air conditioner 1300 has all the technical effects of the water chiller 1100 in the above embodiments, which will not be repeated here.

[0213] Embodiment fourteen, Figure 14 A structural block diagram of an air conditioner 1400 provided by an embodiment of the present application is shown. The air conditioner 1400 includes the water chiller 1200 in the above embodiments.

[0214] The air conditioner 1400 provided by the embodiment of the present application includes the water chiller 1200 in the above embodiments. Therefore, the air conditioner 1400 has all the technical effects of the water chiller 1200 in the above embodiments, which will not be repeated here.

[0215] Embodiment fifteen, an embodiment of the sixth aspect of the present application, proposes a readable storage medium. A program or instruction is stored thereon, and the program or instruction is executed by a processor to realize the steps of the water chiller control method in any of the above embodiments.

[0216] The readable storage medium provided by the embodiment of the present application stores a program or instruction, which is executed by a processor to realize the steps of the water chiller control method in any of the above embodiments. Therefore, the readable storage medium has all the beneficial effects of the water chiller control method in any of the above embodiments, which will not be repeated here.

[0217] In particular, the aforementioned readable storage medium can include any medium capable of storing or transmitting information. Examples of the readable storage medium include an electronic circuit, a semiconductor memory device, a Read-Only Memory (ROM), a Random Access Memory (RAM), a Compact Disc Read-Only Memory (CD-ROM), a flash memory, an Erasable ROM (EROM), a magnetic tape, a floppy disc, an optical disc, a hard disc, an optical fiber medium, a Radio Frequency (RF) link, an optical data storage device, etc. The code segment can be downloaded via a computer network such as the Internet, an intranet, etc.

[0218] In the description of the present specification, the terms "first", "second", etc. are only used for the purpose of description and should not be understood as indicating or implying relative importance, unless otherwise explicitly specified and limited; the terms "connection", "installation", "fixation", etc. should be understood in a broad sense, for example, "connection" can be fixed connection, or detachable connection, or integral connection; can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0219] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "a specific embodiment", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0220] In addition, the technical solutions of various embodiments of the present application can be combined with each other, but it must be based on the fact that a person skilled in the art can realize it, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor within the scope of protection required by the present application.

[0221] 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, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A chiller control method, comprising: The control method comprises the following steps: detecting suction pressure and exhaust pressure of the water chiller; determining system pressure difference of the water chiller according to the suction pressure and the exhaust pressure; adjusting operation state of the water chiller according to comparison result of the system pressure difference and preset pressure difference threshold value; the water chiller is provided with multiple groups of fans, and the adjusting operation state of the water chiller according to the comparison result of the system pressure difference and the preset pressure difference threshold value specifically comprises: adjusting operation state of the multiple groups of fans according to the comparison result of the system pressure difference and the preset pressure difference threshold value; wherein, the operation state comprises start state and stop state; after the adjusting operation state of the multiple groups of fans, the control method further comprises: determining reset time length of each group of fans in the multiple groups of fans from current operation state to initial operation state; adjusting the preset pressure difference threshold value of each group of fans according to comparison result of the reset time length and preset time threshold value; continuing to adjust operation state of the multiple groups of fans according to comparison result of the system pressure difference and the preset pressure difference threshold value after adjustment.

2. The water chiller control method of claim 1, wherein the preset pressure difference threshold value comprises first pressure difference threshold value, and the adjusting operation state of the multiple groups of fans according to the comparison result of the system pressure difference and the preset pressure difference threshold value specifically comprises: comparing the system pressure difference with the first pressure difference threshold value of each group of fans in the multiple groups of fans; based on the system pressure difference being greater than or equal to the first pressure difference threshold value, controlling corresponding fan group to start.

3. The water chiller control method according to claim 2, characterized in that, the preset pressure difference threshold value further comprises second pressure difference threshold value, and the adjusting operation state of the multiple groups of fans according to the comparison result of the system pressure difference and the preset pressure difference threshold value specifically further comprises: comparing the system pressure difference with the second pressure difference threshold value of each group of fans in the multiple groups of fans; based on the system pressure difference being less than or equal to the second pressure difference threshold value, controlling corresponding fan group to stop; wherein, the second pressure difference threshold value of each group of fans is less than the first pressure difference threshold value.

4. The water chiller control method according to claim 1, characterized by, the adjusting the preset pressure difference threshold value of each group of fans according to the comparison result of the reset time length and preset time threshold value specifically comprises: based on the reset time length being greater than the preset time threshold value, decreasing the first pressure difference threshold value of corresponding fan group by a first preset adjustment amount, or increasing the second pressure difference threshold value of the corresponding fan group by a second preset adjustment amount.

5. The water chiller control method according to claim 4, characterized in that, the adjusting the preset pressure difference threshold value of each group of fans according to the comparison result of the reset time length and preset time threshold value specifically further comprises: based on the reset time length being less than or equal to the preset time threshold value, increasing the first pressure difference threshold value of corresponding fan group by the first preset adjustment amount, or decreasing the second pressure difference threshold value of the corresponding fan group by the second preset adjustment amount.

6. The water chiller control method according to claim 1, characterized by, the adjusting operation state of the water chiller according to the comparison result of the system pressure difference and preset pressure difference threshold value specifically further comprises: adjusting operation frequency of the multiple groups of fans according to the comparison result of the system pressure difference and the preset pressure difference threshold value.

7. The water chiller control method according to any one of claims 1 to 6, characterized by, after the detecting suction pressure and exhaust pressure of the water chiller, the control method further comprises: determining system pressure ratio of the water chiller according to the suction pressure and the exhaust pressure; Adjust the running state of the water chiller according to the comparison result of the system pressure ratio and the preset pressure ratio threshold.

8. A water chiller control device, characterized by, Comprise: A detection unit is configured to detect the suction pressure and the discharge pressure of the water chiller; A processing unit is configured to determine the system pressure difference of the water chiller according to the suction pressure and the discharge pressure; A control unit is configured to adjust the running state of the water chiller according to the comparison result of the system pressure difference and the preset pressure difference threshold; The water chiller is provided with multiple groups of fans, and the control unit is specifically configured to adjust the running state of the multiple groups of fans according to the comparison result of the system pressure difference and the preset pressure difference threshold; wherein the running state comprises a start state and a stop state; The processing unit is specifically configured to determine the reset duration of each group of fans from the current running state to the initial running state, and to adjust the preset pressure difference threshold of each group of fans according to the comparison result of the reset duration and the preset time threshold; The control unit is specifically configured to continue to adjust the running state of the multiple groups of fans according to the comparison result of the system pressure difference and the adjusted preset pressure difference threshold.

9. A water chiller, characterized by, Comprise: A memory storing programs or instructions; A processor, when executing the programs or instructions, implements the steps of the water chiller control method according to any one of claims 1 to 7.

10. A water chiller, characterized by, Comprise: The water chiller control device according to claim 8; A first pressure sensor is configured to detect the suction pressure of the water chiller; A second pressure sensor is configured to detect the discharge pressure of the water chiller; The control device adjusts the running state of the water chiller according to the suction pressure, the discharge pressure, and the preset pressure difference threshold.

11. The water chiller of claim 10, wherein, Further comprise: Multiple groups of fans; The control device controls the multiple groups of fans to start or stop according to the suction pressure, the discharge pressure, and the preset pressure difference threshold.

12. An air conditioner characterized by comprising: Comprise: The water chiller according to any one of claims 9 to 11.

13. A readable storage medium, on which a program or instructions are stored, characterized in that, The programs or instructions, when executed by the processor, implement the steps of the water chiller control method according to any one of claims 1 to 7.

Images